Patent Publication Number: US-10307772-B2

Title: Spraying device

Description:
RELATED APPLICATIONS 
     The present application is the U.S. national phase entry of PCT/CN2016/089405, with an international filing date of Jul. 8, 2016, which claims the benefit of Chinese Patent Application No. 201620171721.3, filed on Mar. 7, 2016, the entire disclosures of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The present application relates to the field of cleaning equipment, and more particularly to a spraying device. 
     BACKGROUND 
     In the automatic production line of a display device such as a Thin Film Transistor Liquid Crystal Display (TFT-LCD), it is usually necessary to clean the material such as a glass substrate, a substrate for forming a certain film, and other raw materials. By way of example, a spraying device may be used to clean the materials or the like. 
     In the prior art, it is common to use a stationary spraying device to clean the material or the like. The stationary spraying device comprises a spraying pipe which is closed at one end and is open at the other end, and a plurality of spraying holes are arranged on the side of the spraying pipe, and a control valve is arranged on the side of the stationary pipe near the open end. When the material to be cleaned is cleaned with the stationary spraying device, the material to be cleaned is placed in the spraying room, and the stationary spraying device is fixed in the spraying room so that the spraying holes on the spraying pipe faces the material to be cleaned. And then the control valve is opened, and liquid in the reservoir enter the spraying pipe through the open end of the spraying pipe, and is sprayed onto the material to be cleaned through the spraying holes of the spraying pipe to clean the material to be cleaned. 
     During practice, the inventor have found that the prior art has at least the following problems: the spraying holes of the stationary spraying device are exactly the spraying spout of the stationary spraying device, and since the spraying spout is fixed on the side of the spraying pipe, the liquid is usually sprayed from the spraying spout to the fixed area on the material to be cleaned, resulting in poor uniformity of the liquid spraying onto the material to be cleaned and poor cleaning effect of the stationary spraying device. 
     In another prior art, the spraying device comprises a swing-type spraying device. In the swing-type spraying device the swing structure is added on the basis of a stationary spraying device, which structure can make the spraying spout to swing. However, the spraying trajectory of the swing-type spraying device spraying onto the material to be cleaned is usually sinusoidal, the liquid spraying uniformity is poor, and the swing-type spraying device needs to continually swing. During the swing process, the spraying device need to do acceleration or deceleration movement, and thus the swing-type spraying device has large vibration, affecting the yield of products. And because of the need for swing, wear of the device is also larger. 
     SUMMARY 
     An embodiment of the present disclosure provides a spraying device comprising a spraying mechanism and a rotating mechanism, which rotating mechanism comprises a rotating sidewall, which sidewall is provided with multiple sets of spraying holes arranged along the circumference of the rotating sidewall. Each set of spraying holes comprises a plurality of spraying holes, and the spraying holes of at least two adjacent sets of spraying holes are arranged in a staggered arrangement. The spraying mechanism comprises an infusion channel, the sidewall of which is provided with a spraying spout. The infusion channel extends along the inside of the rotating sidewall, the rotating sidewall being configured to rotate or swing with respect to the spraying spout of the infusion channel. 
     In some embodiments, the rotating sidewall has a barrel structure or a prismatic structure or an arc sidewall having a radian, and the plurality of spraying holes in each set of spraying holes are arranged along the lengthwise direction of the rotating sidewall. 
     In some embodiments, the infusion channel has a round tubular structure with one end open and the other end closed, and the spraying spout is an elongated spraying spout with a lengthwise direction parallel to the lengthwise direction of the infusion channel. 
     In some embodiments, the lengthwise direction of the infusion channel is parallel to the lengthwise direction of the rotating sidewall, and the rotating sidewall is configured to rotate or swing relative to the spraying spout of the infusion channel to make the spraying spout to align with the different set of spraying holes at different times. 
     In some embodiments, the infusion channel is provided with a spraying member comprising a first opening and a second opening and a closed sidewall, the first opening connecting the spraying spout, the second opening facing the rotating sidewall. 
     In some embodiments, the spraying member has an elongated structure and has a fan-shaped cross-section in a direction perpendicular to the lengthwise direction of the infusion channel. 
     In some embodiments, the edge of the second opening in the spraying member is provided with a wear-resistant member, and the spraying spout is in contact with the rotating sidewall through the wear-resistant member. 
     In some embodiments, the spraying holes are evenly distributed on the rotating sidewall. 
     In some embodiments, the second opening is an elongated opening, the length of the second opening being less than or equal to the length of the rotating sidewall. 
     In some embodiments, an angle adjustment mechanism is disposed on the infusion channel for adjusting the spray angle of the spraying spout of the infusion channel. 
     In some embodiments, the spraying device further comprises: a drive mechanism for driving the rotating sidewall to rotate. 
     In some embodiments, the spraying device further comprises a first support frame and a second support frame, the first support frame being provided with a first retaining ring, the second support frame being provided with a second retaining ring; wherein the infusion channel comprises a closed end secured to the first support frame by means of the first retaining ring, and an open end secured to the second support frame by means of the second retaining ring. 
     In some embodiments, the spraying device further comprises a connecting tube and a control valve, the infusion channel comprising a closed end and an open end, the open end connecting to one end of the connecting pipe, and the control valve is arranged on the connecting pipe; when the spraying device is in operation, the open end is communicated with the reservoir through the connecting pipe, and the control valve is used to control the flow of the sprayed liquid. 
     In some embodiments, the spraying device further comprises: a first bearing, a second bearing and a first end cover, a second end cover, the closed end of the infusion channel being connected to the first bearing, the open end of the infusion channel being connected to the second bearing, the first bearing and the second bearing being respectively provided in center holes of the first end cover and the third end cover, the first end cover and the third end cover being respectively fixedly connected to the rotating sidewall. 
     In some embodiments, the spraying device further comprises a transmission mechanism disposed on the first end cover or the third end cover and a drive mechanism for driving the rotating sidewall through the transmission mechanism. 
     In some embodiments, the transmission mechanism is a gear or pulley, and the transmission mechanism is fixedly connected to the first end cover or the third end cover by key-and-slot connection. 
     The technical solution provided by the application has the beneficial effect that the liquid can be sprayed from the different set of spray hole at different times because the spraying spout is aligned with the different sets of spray holes at different times, so that the liquid is sprayed on different areas of the material to be cleaned; therefore, the uniformity of the sprayed liquid is better, and the cleaning effect is better. 
     It is to be understood that both the foregoing general description and the following detailed description are exemplary only and do not limit the invention. 
    
    
     
       BRIFE DESCRIPTION OF DRAWINGS 
       In order to more clearly illustrate the technical solution in the embodiments of the present disclosure, the drawings which are to be used in the description of the embodiments will be briefly introduced. It will be apparent that the drawings in the following description are merely examples of the present disclosure. It will be apparent to those skilled in the art that other drawings may be obtained from these drawings without expending any creative work. 
         FIG. 1  is a schematic view of a three-dimensional structure of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 2  is another schematic view of a three-dimensional structure of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 3  is a schematic partial sectional view of a three-dimensional structure of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 4  is a plan view of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 5  is a bottom view of the spraying device provided in the embodiment shown in  FIG. 4 ; 
         FIG. 6  is a schematic structural view of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 7  is another schematic structural view of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 8  is an exploded view of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 9  is another exploded view of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 10  is still another exploded view of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 11  is a diagram showing the relationship between a spray mechanism and a rotation mechanism provided by an embodiment of the present disclosure; 
         FIG. 12  is another diagram showing positional relationship between the spraying mechanism and the rotation mechanism provided by the embodiment of the present disclosure; 
         FIG. 13  is a schematic view of a spraying device according to an embodiment of the present disclosure after removal of the rotating sidewall; 
         FIG. 14  is another schematic view of a spraying device provided by an embodiment of the present disclosure after removal of the rotating sidewall; 
         FIG. 15  is a partially enlarged view of another exploded view of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 16  is a partially enlarged view of an exploded view of a spraying device provided by an embodiment of the present disclosure; 
         FIG. 17  is a view showing a use state of a spraying device according to an embodiment of the present disclosure. 
     
    
    
     The drawings herein are incorporated into and constitute a part of this specification, showing embodiments according to the disclosure and together with the description serve to explain the principles of the disclosure. 
     DETAILED EMBODIMENTS 
     In order to make the objects, technical solutions and advantages of the present disclosure to become more apparent, the present disclosure will be described in detail below in connection with the accompanying drawings. It is apparent that the described embodiments are merely part of the embodiments of the disclosure and are not all of the embodiments. All other embodiments obtained by those ordinary skilled in the art based on embodiments in the present disclosure without making creative work belong to the protection scope of the present disclosure. 
     Referring to  FIG. 1 , there is shown a schematic view of a three-dimensional structure of a spraying device  00  according to an embodiment of the present disclosure. The spraying device  00  can be used for cleaning a material such as a glass substrate, in an automated production line of a display device. Referring to  FIG. 1 , the spraying device  00  mainly comprises a spraying mechanism and a rotating mechanism. 
     The rotation mechanism comprises a rotating sidewall  01  on which multiple sets of spraying holes (not shown in  FIG. 1 ) arranged along the circumference of the rotating sidewall  01  are provided. Each set of spraying holes comprises a plurality of spraying holes A, such as a row of spraying holes A. The spraying holes A in at least two adjacent sets of spraying holes are arranged in a staggered arrangement. 
     The spraying mechanism comprises an infusion channel  02 , the sidewall of which is provided with a spraying spout (not shown in  FIG. 1 ). 
     The infusion channel  02  extends along the interior of the rotating sidewall  01 , and the rotating sidewall  01  is able to align the spraying spout with the different sets of spraying holes at different times by rotation. Here, the rotational direction of the rotating sidewall  01  may be the direction s shown in  FIG. 1 , and of course, it may be a direction opposite to the direction s. 
     In view of the above, the spraying device provided by the embodiment of the present disclosure has the advantage that the liquid can be sprayed from different sets of spraying holes at different times since the spraying spout is aligned with different sets of spray holes at different times, so that the liquid is sprayed to the different areas of the material to be cleaned, therefore, the uniformity of liquid spraying is better, and the cleaning effect is better. 
     Further, continually referring to  FIG. 1 , the rotating sidewall  01  has a barrel structure. A plurality of spraying holes A are arranged along the lengthwise direction (i.e., longitudinal direction) x of the rotating sidewall  01 , and the plurality of spraying holes in each set are evenly distributed on the rotating sidewall  01  (i.e., there is an equal spacing therebetween). The infusion channel  02  has a round tubular structure one end of which is open to and the other end of which is closed, and the spraying spout is an elongated spraying spout having a lengthwise direction parallel to the lengthwise direction of the infusion channel  02 . The lengthwise direction of the infusion channel  02  is parallel to the lengthwise direction x of the rotating sidewall  01 , and the rotating sidewall  01  can be rotated about the axis (not is shown in  FIG. 1 ) of the barrel-shaped rotating sidewall  01  so that the spraying spout is aligned with the different set of spraying holes at different times. 
     Optionally, the spraying device  00  further comprises an angle adjusting mechanism (not shown in  FIG. 1 ) provided on the infusion channel  02  for adjusting the spraying angle of the spraying spout of the infusion channel  02 . By way of example, the angle adjustment mechanism may drive the infusion channel  02  to rotate about the axis of the infusion channel  02  so that the spraying angle (or orientation) of the spraying spout of the infusion channel  02  varies so as to achieve adjustment of the spraying angle. Therein the angle adjusting mechanism may be an external handle or a motor, the handle is used for adjusting the spraying angle of the spraying spout in an artificial manner, and the motor is used to adjust the spraying angle of the spraying spout electrically. 
       FIG. 2  shows another schematic view of a three-dimensional structure of a spraying device  00  provided by an embodiment of the present disclosure. Referring to  FIGS. 1 and 2 , the spraying device  00  further comprises a first support frame  03  and a second support frame  04 . The first support frame  03  is provided with a first retaining ring  031  and a second retaining ring  041  is provided on the second support frame  04 . The infusion channel  02  comprises a closed end and an open end, and the closed end of the infusion channel  02  is fixed to the first support frame  03  by the first retaining ring  031 , and the open end is fixed to the second support frame  04  by the second retaining ring  041 . Optionally, the open end of the infusion channel  02  is provided with an angular scale k arranged along the circumference of the infusion channel  02 , and the second retaining ring  041  is provided with an opening (not shown in  FIGS. 1 and 2 ). The opening may indicate the angle scale of the infusion channel  02 , which indicates the angle of spraying of the spraying spout of the infusion channel  02 . 
     Further, continually referring to  FIGS. 1 and 2 , the spraying device  00  may further comprise a connecting pipe  05  and a control valve  06 . The open end of the infusion channel  02  is connected to one end of the connecting pipe  05 , and the control valve  06  is provided on the connecting pipe  05 . When the spraying device  00  is in operation, the open end of the infusion channel  02  is communicated with the reservoir (not shown in  FIGS. 1 and 2 ) through the connecting pipe  05  so that the liquid in the reservoir enters the infusion channel  02  through the connecting pipe  05 . The control valve  06  is used to control the flow of the liquid entering the infusion channel  02 . 
     Further, continually referring to  FIG. 1 , the spraying device  00  may further comprise a first bearing (not shown in  FIG. 1 ), a second bearing (not shown in  FIG. 1 ), and a transmission mechanism  07 . The closed end of the infusion channel  02  is connected to the first bearing, the open end is connected to the second bearing, and the infusion channel  02  is connected to the rotating sidewall  01  through the first bearing and the second bearing. The transmission mechanism  07  is, for example, a gear, and is fixed to the rotating sidewall  01  indirectly. In other embodiments, the transmission mechanism  07  may be a pulley or the like. Optionally, the spraying device  00  may also comprise a drive mechanism (not shown in  FIG. 1 ) for rotating the rotation sidewall  01  by the gear  07 . By way of example, the drive mechanism is used to rotate the rotating sidewall  01  about the axis of the rotating sidewall  01  by means of the gear  07  so that the spraying spout is aligned with the different sets of spraying holes at different times, and thus the liquid entering the infusion channel  02  through the connection pipe  05  enters the rotating sidewall  01  from the spraying spout of the infusion channel  02  and is sprayed from the different sets of spraying holes of the rotating sidewall  01 . 
     Referring to  FIG. 3 , there is shown a partial three-dimensional schematic view of a spraying device  00  according to an embodiment of the present disclosure. Referring to  FIG. 3 , the infusion channel  02  is provided with a spraying member  021  which comprises a first opening (at one end near the infusion channel  02 ) and a second opening (near one end of the rotating sidewall  01 ) and a closed spraying sidewall (for connecting the first opening and the second opening). Therein the first opening connects the spraying spout on the infusion channel  02  and the second opening faces the rotating sidewall  01 . Optionally, the spraying member  021  is of an elongated (long strip shaped) structure, and the spraying member  021  has a fan-shaped cross section in a plane perpendicular to its lengthwise direction. Therein the cross section of the spraying member  021  is in a plane on the spraying member  021  perpendicular to the lengthwise direction of the spraying member  021 , and the lengthwise direction of the spraying member  021  is parallel to the lengthwise direction x of the rotation sidewall  01 . By way of example, in the embodiment of the present disclosure, the spraying member  021  is welded (or connected in other connection way) to the infusion channel  02 . Alternatively, the spraying member  021  and the infusion channel  02  are integrally formed by molding, and the embodiments of the present disclosure are not limited thereto. 
     Optionally, as shown in  FIG. 3 , the edge of the second opening on the spraying member  021  is provided with a sealing wear-resistant member  022 , and the spraying member  021  is in contact with the rotating sidewall  01  by means of the sealing wear-resistant member  022 . The provision of the sealing wear-resistant member  022  can prevent the spraying member  021  from being worn and improve the service life of the spraying member  021 . Further, the sealing wear-resistant member  022  can maintain a certain degree of tightness between the spraying member  021  and the rotating sidewall  01 , thereby making the sprayed liquid more stable. 
       FIGS. 4 and 5  show a plan view of a spraying device  00  provided by an embodiment of the present disclosure, wherein  FIG. 5  is a bottom view of the spraying device  00  provided in the embodiment shown in  FIG. 4 . As can be seen from  FIG. 4  or  FIG. 5 , the spraying device  00  comprises a spray mechanism, a rotation mechanism, a first support frame  03 , a second support frame  04 , a connection pipe  05 , and a control valve  06 . 
     The spraying mechanism comprises an infusion channel  02  which is a circular tubular structure with one end open and one end closed. The sidewall of the infusion channel  02  is provided with a spraying spout which is a long stripe-shaped spraying spout (not shown in  FIG. 4 ) having a lengthwise direction parallel to the lengthwise direction of the infusion channel  02 . 
     The rotating mechanism comprises a rotating sidewall  01  which has, for example, a cylindrical structure, and a plurality of spraying hole sets  011  arranged along the circumference of the rotating sidewall  01  are provided on the rotating sidewall  01 . Each set of spraying holes  011  comprises a plurality of spraying holes A. By way of example, the plurality of spraying holes A are arranged along the lengthwise direction x of the rotating sidewall  01 , and the spraying holes A in at least two adjacent spraying hole sets are staggered, and the spraying holes A are uniformly distributed on the rotation sidewall  01 , so that the liquid can be uniformly sprayed from the rotating sidewall  01 . Of course, the rotating sidewall  01  may not have a cylindrical structure, for example, it may have a prismatic structure. In a further embodiment, the rotating sidewall  01  may be an arc sidewall having a radian, which arc sidewall rotates or swings under an angle centered on the spraying member  021 . 
     Referring to  FIG. 4 or 5 , the infusion channel  02  extends along the inside of the rotating sidewall  01 , and the lengthwise direction of the infusion channel  02  is parallel to the lengthwise direction x of the rotating sidewall  01 . The first support frame  03  is provided with a first retaining ring (not shown in  FIG. 4  and  FIG. 5 ), and a second retaining ring (not shown in  FIG. 4  and  FIG. 5 ) is provided on the second support frame  04 . the closed end of the infusion channel  02  is fixed to the first support frame  03  by the first retaining ring, and the open end of the infusion channel  02  is fixed to the second support frame  04  by the second retaining ring, and the open end of the infusion channel  02  is connected to one end of the connecting pipe  05 . And the control valve  06  is provided on the connecting pipe  05 . When the spraying device  00  is in operation, the opening end of the infusion channel  02  is communicated with the reservoir (not shown in  FIGS. 4 and 5 ) through the connecting pipe  05 , and the control valve  06  is used to control the flow of liquid entering the infusion channel  02 . 
     Optionally, the spraying device  00  also comprises a drive mechanism (not shown in  FIGS. 4 and 5 ) for driving the rotating sidewall  01  to rotate through the gear  07 . By way of example, under driving of the drive mechanism, the rotating sidewall  01  can be rotated about the axis of the rotating sidewall  01  so that the spraying spout is aligned with the different sets of spraying holes at different times. Since the spray holes A in at least two adjacent spray hole sets  011  of the rotating sidewall  01  are staggered, the liquid is sprayed from the different spraying hole sets  011  of the rotating sidewall  01 , onto the different areas of the material to be cleaned, so that the liquid sprayed to the material to be cleaned is more uniform, and the cleaning effect is better. By way of example, as shown in  FIG. 6 , it is assumed that at a first moment the liquid is sprayed from the spraying holes A in the spraying hole set  011  shown in  FIG. 6  and the rotation sidewall  01  is rotated in the direction s shown in  FIG. 1 , the liquid is sprayed from the spraying holes A in the spraying hole set  011  shown in  FIG. 7  at a second moment. As shown in  FIGS. 6 and 7 , it can be seen that the spray holes A in the spraying hole set  011  shown in  FIG. 6  is staggered with the spraying holes A in the spraying hole set  011  shown in  FIG. 7 . It is to be noted that R 1  shown in  FIG. 6  and R 2  shown in  FIG. 7  both indicate the spraying ranges of liquid. 
     Optionally, the infusion channel  02  is provided with a spraying member comprising a first opening and a second opening and a closed spraying sidewall. The first opening is connected to the spraying spout and the second opening faces the rotating sidewall  01 , wherein the second opening is an elongated opening which has a length less than or equal to the length of the rotating sidewall  01 . By way of example, the length of the second opening may be the length d shown in  FIG. 7 . 
       FIGS. 8 to 10  show exploded views of a spraying device  00  provided by an embodiment of the present disclosure. See  FIGS. 8 to 10 , the spraying device  00  comprises a spraying mechanism, a rotation mechanism, a first support frame  03 , a second support frame  04 , a connection pipe  05 , a control valve  06 , a gear  07 , a first bearing  08 , and a second bearing  09 . 
     The spraying mechanism comprises an infusion channel  02  which has a round tubular structure with one end open and the other end closed. The sidewall of the infusion channel  02  is provided with a spraying spout which may be an elongated opening having a lengthwise direction parallel to the lengthwise direction x 1  of the infusion channel  02 . By way of example, the spraying spout is an opening E as shown in  FIG. 10 . The infusion channel  02  is provided with a spraying member  021  which comprises a first opening and a second opening and a closed spraying sidewall. The first opening is connected to the spraying spout E, and the second opening faces the rotating sidewall  01 . Optionally, the spraying member  021  is of the elongated structure, and the cross section of the spraying member  021  in a plane perpendicular to the lengthwise direction may be fan-shaped. The second opening is located on the fan-shaped curved surface, and the edge of the second opening is provided with a sealing wear-resistant member  022 . 
     The rotating mechanism comprises a barrel-shaped rotating sidewall  01  which is, for example, a cylindrical structure in which a plurality of spraying hole sets arranged along the circumference of the rotating sidewall  01  are provided on the rotating sidewall  01  (not shown in  FIGS. 8 to 10 ), and each set of the spraying holes has a plurality of spraying holes A. For example, a plurality of spraying holes in each of the spraying hole sets are arranged along the lengthwise direction of the rotation sidewall  01 , and the spray holes A in at least two adjacent sets of spraying holes are staggered and the spray holes A are evenly distributed on the rotating sidewall  01 . 
     Referring to  FIG. 8 , the closed end of the infusion channel  02  is connected to the first bearing  08 , the open end is connected to the second bearing  09 , and the infusion channel  02  is fixedly connected to the rotating sidewall  01  through the first bearing  08  and the second bearing  09 . The gear  07  is indirectly connected to the rotating sidewall  01  and is connected to an external drive mechanism. Of course, as described above, the gear  07  is not limited to the form shown in the drawings, and may also be replaced by other drive members, such as pulleys. Optionally, as shown in  FIG. 8 , the spraying device  00  further comprises a first gasket  10 , a first end cover  11 , a second end cover  12 , a second gasket  13 , a third end cover  14 , and a fourth end cover  15 . The first end cover  11 , the second end cover  12 , the third end cover  14 , and the fourth end cover  15  are provided with openings. The first support frame  03  is provided with a first retaining ring  031 , a second retaining ring  041  is provided on the second support frame  04 , and a control valve  06  is provided on the connecting pipe  05 . 
     During assembling of the spraying device  00  as shown in  FIGS. 8 to 10 , the infusion channel  02  extends along the inside of the rotating sidewall  01 , and both ends of the infusion channel  02  extend out from both ends of the rotating sidewall  01 , respectively, and the lengthwise direction x 1  of the infusion channel is parallel to the lengthwise direction x of the rotating sidewall  01 . The spraying member  021  of the infusion channel  02  is brought into contact with the rotating sidewall  01  by the sealing wear-resistant member  022 . The closed end of the infusion channel  02  passes through the first gasket  10 , the first end cover  11 , the first bearing  08  and the second end cover  12  and extends from the opening in the second end cover  12  and finally is fixed to the first support frame  03  through the first retaining ring  031 . The first gasket  10  is disposed between the first end cover  11  and the first end of the rotating sidewall  01 , and the first bearing  08  is disposed in the center hole of the first end cover  11 . The first end cover  11  is fixedly connected to the first end of the rotating sidewall  01  by means of a screw (or other connection means) for rotatably securing the rotating sidewall  01  to the infusion channel  02  in cooperation with the first bearing  08  therein. The second end cover  12  is fixedly connected to the first end cover  11  by means of a screw (or other connection means) for axially fixing the first bearing  08  in the center hole of the first end cover  11 . The opening end of the infusion channel  02  passes through the second gasket  13 , the third end cover  14 , the second bearing  09 , the gear  07  and the fourth end cover  15  and extends from the opening in the fourth end cover  15 , and are fixed to the second support frame  04  through the second retaining ring  041 . The second gasket  13  is disposed between the third end cover  14  and the second end of the rotating sidewall  01 . The second bearing  09  is provided in the center hole of the third end cover  14 . The third end cover  14  is provided with a flat key J (shown in  FIG. 16 ), and the gear  07  is fixedly connected to the third end cover  14  by a key-and-slot connection. The third end cover  14  is fixedly connected to the second end of the rotating sidewall  01  by means of a screw (or other connection means) for rotatably securing the rotating sidewall  01  to the infusion channel  02  in cooperation with the second bearing  09  therein. The fourth end cover  15  is fixedly connected to the third end cover  14  by means of a screw (or other connection means) for axially fixing the second bearing  09  in the center hole of the third end cover  14 . Thus, the rotating sidewall  01  can be rotated about the axis of the rotating sidewall  01  (neither shown in  FIGS. 8 to 10 ) so that the spraying spout of the infusion channel  02  is aligned with the different sets of spraying holes of the rotating sidewall  01  at different times. Among them, the provision of the sealing wear-resistant member  022  can prevent the spraying member  021  from being worn and improve the service life of the spraying member  021 . 
     It should be noted that, as shown in  FIG. 8 or 9 , the open end of the infusion channel  02  is provided with an angle scale k arranged along the circumference of the infusion channel  02 , and the second retaining ring  041  is provided with an indicator (for example, an opening or notch) which may indicate the angle scale of the infusion channel  02 , the angle scale indicated by the indicator indicates the degree of the angle between the longitudinal axial cross section of the spraying member  021  of the infusion channel  02  and the vertical plane, and indicates the spraying angle of the spraying spout of the infusion channel  02 . 
     Optionally, an angle adjustment mechanism (e.g., a handle or a motor) is provided on the infusion channel  02 , which can drive the infusion channel  02  to rotate about the axis of the infusion channel  02  so that the angle between the longitudinal axial cross section of the spraying member  021  of the infusion channel  02  and the vertical plane varies to achieve the adjustment of the spraying angle of the spraying spout of the infusion channel  02 . By way of example, in an initial state, the angle scale indicated by the indicator on the second retaining ring  041  is 0 degree, and the positional relationship between the infusion channel  02  and the rotating sidewall  01  is shown in  FIG. 11 . At this time, the angle between the longitudinal axial cross section of the spraying member  021  and the vertical plane is equal to 0 degree. When the angle adjusting mechanism is actuated, for example, the angle scale indicated by the indicator on the second retaining ring  041  is 30 degrees, and the positional relationship between the infusion channel  02  and the rotating sidewall  01  is as shown in  FIG. 12 . Referring to  FIG. 12 , the angle between the longitudinal axial cross section of the spraying member  021  and the vertical plane is equal to 30 degrees. In the embodiment of the present disclosure, the angle of spraying of the infusion channel  02  in the vertical direction can be continuously and visually adjusted by setting the angle scale on the infusion channel  02  and setting the angle adjusting mechanism to drive the infusion channel  02  to rotate about the axis of the infusion channel  02 . Preferably, it is necessary to release the first and second retaining rings firstly when the above-mentioned angle adjustment is required. And after the angle adjustment, the first and second retaining rings are locked to realize the stabilization of the infusion channel  02 . 
       FIGS. 13 and 14  are schematic views of the spraying device  00  provided by the embodiment of the present disclosure after the removal of the rotating sidewall  01 . Referring to  FIG. 13  or  FIG. 14 , the spraying mechanism comprises an infusion channel  02  on the sidewall of which a spraying spout is provided. The spraying spout may be an elongated spraying spout having a lengthwise direction same as the lengthwise direction of the infusion channel  02 . The infusion channel  02  is provided with a spraying member  021  which comprises a first opening and a second opening and a closed spraying sidewall. The first opening is connected to the spraying spout and the second opening faces the rotating sidewall. And the spraying member  021  may have a long strip-like structure, in which the cross section of the spraying member  021  is fan-shaped, and the second opening is located on the fan-shaped curved surface, and the edge of the second opening is provided with a sealing wear-resistant member  022 . 
       FIGS. 15 and 16  are partial enlarged views of an exploded view of a spraying device  00  provided by an embodiment of the present disclosure. The spraying device  00  comprises a spraying mechanism and a rotation mechanism. See  FIG. 15  (which shows the construction of the closed end of the spraying device  00 ), the spraying device  00  also comprises a first bearing  08 , a first gasket  10 , a first end cover  11  and a second end cover  12 . The first end cover  11  and a second end cover  12  both are provided with openings (for passing through the infusion channel  02 ), and the first support frame  03  is provided with a first retaining ring  031 . See  FIG. 16  (which shows the construction of the open end of the spraying device  00 ), the spraying device  00  further comprises a gear  07 , a second bearing  09 , a second gasket  13 , a third end cover  14  and a fourth end cover  15 . The third end cover  14  and the fourth end cover  15  both are provided with openings (for passing through the infusion channel  02 ). The gear  07  is provided with teeth for receiving driving of the drive mechanism. The second support frame  04  is provided with a second retaining ring  041 , and the control valve  06  is provided on the connecting pipe  05 . The gear  07  is fixedly connected to the third end cover  14  by the engagement of the groove on the shaft hole thereon with the flat key J on the third end cover  14 . The gear  07  is used to drive the rotating sidewall  01 . 
     As shown in  FIG. 16 , the open end of the infusion channel  02  is provided with an angle scale k arranged along the circumference of the infusion channel  02 , and the second retaining ring  041  is provided with an indicator c which can indicate the angle scale of the infusion channel  02 . The angle scale indicated by the indicator indicates the angle of the angle between the longitudinal axial cross section of the spraying member of the infusion channel  02  and the vertical plane, indicating the spraying angle of the spraying spout. 
       FIG. 17  is a view showing the use state of the spraying device  00  provided in the embodiment of the present disclosure. See  FIG. 17 , the spraying device  00  is provided in the spraying chamber (not shown in  FIG. 17 ) by the first support frame  03  and the second support frame  04  when in use. The infusion channel  02  of the spraying mechanism is communicated with the reservoir by the connecting pipe  05 , and the valve opening degree of the control valve  06  is adjusted so that the liquid in the reservoir enters the infusion channel  02  through the connecting pipe  05  and enters the rotating sidewall  01  of the rotating mechanism through the spraying spout of the infusion channel  02 . The rotating sidewall  01  is rotated about axis of the rotation sidewall  01  by the drive mechanism in the direction s shown in  FIG. 17 , so that the liquid entering the rotating sidewall  01  is sprayed from the different sets of spraying holes on the rotating sidewall  01 , while the material to be cleaned passes under the spraying device  00  in the direction p shown in  FIG. 17 . In this process, the liquid sprayed from the different sets of spraying holes of the rotating sidewall  01  is sprayed to different areas of the material to be cleaned. 
     The rotation of the rotating sidewall  01  may be a rotation of a complete circumference or a rotation of a nonholonomic circumference, for example, a reciprocating motion within an angle. The angle is, for example, the angle centered on the spraying member  021 . The rotating sidewall  01  may be an arc sidewall having a certain degree of curvature in the case of reciprocating rotational motion at an angle. 
     When the spraying angle of the spraying spout needs to be adjusted, the infusion channel  02  is driven by the angle adjusting mechanism to rotate about the axis of the infusion channel  02  and the spray angle of the spraying spout is observed by the angle scale on the infusion channel  02 , so that the spraying angle of the spraying is adjusted to the desired spraying angle. 
     In view of the above, the embodiment of the present disclosure provides a spraying device which rotates the sidewall so that the spraying spout is aligned with different sets of spray holes at different times so that the liquid can be sprayed from the different sets of spray holes at different times, improving the uniformity of liquid spraying, with a good cleaning effect. The spraying device provided by the embodiment of the present disclosure can further improve the uniformity of liquid spraying by adjusting the rotational speed of the rotating sidewall. 
     In addition, the spraying device provided by the embodiment of the present disclosure solves the problem that the uniformity of the liquid spraying of the swing-type apparatuses in the prior art is poor. And since the rotating sidewall can be rotated at a uniform speed without acceleration or deceleration movement, the vibration of the spraying device is small, reducing the impact on product yield. And by setting the sealing wear-resistant parts, the problem of larger wear of the swing-type spraying apparatuses is further solved. In addition, the spraying device provided by the embodiment of the present disclosure can adjust the spray angle of the spraying spout of the infusion channel according to the need of the production process, so that the degree of scattering of the liquid spraying can be better controlled. 
     The foregoing is merely preferred embodiments of the present disclosure and is not intended to limit the disclosure, and any modifications, equivalent substitutions, improvements, and the like within the spirit and principles of the disclosure are intended to be encompassed by the protection scope of the disclosure. It should be noted that the wording “comprising” does not exclude the presence of elements or steps not listed in the claims. The phrase ‘a’ or ‘an’ in front of an element does not exclude the presence of multiple such elements. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that the combination of these measures cannot be used for advantage. Any reference signs in the claims should not be construed as limiting the scope.