Patent Publication Number: US-2018051820-A1

Title: Right angle valve

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to right angle valves, and more particularly, to a right angle valve capable of covering the disc spring in order to prevent the disc spring from being stuck by other objects and facilitate the position recovering operation thereof. 
     2. Description of the Related Art 
     Referring to  FIG. 1 , a sectional view of a known right angle valve is shown. The known right angle valve is used to adjusting or block the air flowing in a vacuum system. The known right angle valve often includes a three way pipe  1 , a piston  2 , a controlling shaft  3 , and a valve plate  4 . The piston  2  is movably disposed on one end of the three way pipe  1 . One end of the controlling shaft  3  is connected to the piston  2 , with the other end thereof connected to the valve plate  4  for controlling the valve plate  4  to open or close the three way pipe  1 . Also, a disc spring  5  is disposed between the valve plate  4  and the controlling shaft  3 , so as to provide a position recovering force to the piston  2 . 
     When the piston  2  is driven due to an air pressure, the piston  2  forces the controlling shaft  3  to move, thereby triggering the valve plate  4  to allow the connection in the three way pipe  1 ; at the meantime, the disc spring  5  is compressed. When the air pressure is removed, with the resilient force provided by the disc spring  5 , the piston  2  moves to make the valve plate  4  block the connection in the three way pipe  1 . With such operation, the air inflow and outflow are achieved. However, during the air inflow and outflow, the air might contain a certain amount of impurities, foreign matter, or dust, such objects are easily stuck on or attached to the disc spring  5 . As a result, the movement of the disc spring  5  is kept from being facilitate, failing to accomplish a compete position recovering operation. 
     SUMMARY OF THE INVENTION 
     For improving such issues, an embodiment of the present invention discloses a right angle valve, which applies a covering measure to cover the disc spring when the air inflow is permitted, so as to prevent the disc spring from being stuck by foreign objects and facilitate the operation thereof. 
     For achieving the aforementioned objectives, an embodiment of the present invention provides a right angle valve, comprising: 
     a valve body including a cavity and a first pipe and a second pipe that are connected with the cavity; 
     a fixing member fixed to the valve body, the fixing member provided with a combining end inserted into the cavity; 
     a disc spring with one end combined to the combining end and the other end connected with a sealing member for sealing an inner end of the first pipe; 
     a cover body fixed to an end of the valve body away from the first pipe; 
     a piston member slidingly disposed in the cover body, one end of the piston member combined to the sealing member; and 
     a covering measure, the covering measure covering the disc spring when the piston member drives the sealing member to move away from the inner end of the first pipe in order to allow an air inflow, such that the disc spring is prevented from being exposed to the flowing air and prevented from being stuck or attached by foreign objects. 
     In an embodiment of the present invention, the covering measure includes a sleeve provided with a fixing end and a free end. The fixing end is fixedly combined with the fixing member, and the free end surrounds the combining end of fixing member and the disc spring. 
     In an embodiment of the present invention, when the sealing member moves away from the inner end of the first pipe to the largest distance, the sealing member resists against the free end. 
     In an embodiment of the present invention, the covering measure includes a sleeve that is fixedly combined with the sealing member and surrounds the disc spring. 
     In an embodiment of the present invention, the cover body is provided with an inner space, and the piston member has a piston body slidingly disposed in the inner space. In addition, an air inflow portion is disposed at the cover body adjacent to the valve body, and the air inflow portion is connected with the inner space. 
     In an embodiment of the present invention, the piston body is connected with a controlling shaft. The controlling shaft passes through the fixing member and is connected with the sealing member. 
     In an embodiment of the present invention, the piston body is concavely provided with a spring recess; the cover body is provided with a sealed end; a spring is disposed between the spring recess and the sealed end. 
     In an embodiment of the present invention, a positioning member is inserted in the spring. 
     In an embodiment of the present invention, the sealed end of the cover body is provided with a silencing member, wherein the inner end of the silencing member contacts the inner space. 
     In an embodiment of the present invention, a heating device is further provided for heating the valve body. 
     In an embodiment of the present invention, a heat insulating plate is further provided and disposed between the valve body and the cover body. 
     With such configuration, through the covering measure, when the sealing member opens to allow the air flow, the disc spring is covered in the sleeve, so as to prevent the disc spring from being stuck or attached by foreign matters or objects, thereby avoid the incompletion of the disc spring movement. 
     Furthermore, the heating device is used to heat the valve body, such that when the first pipe is opened, the micro-size foreign matters or objects are burned by the high temperature heat. Therefore, the foreign objects are unable to be accumulated in the pipe. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a sectional view of a known right angle valve. 
         FIG. 2  is a sectional view of a right angle valve in accordance with an embodiment of the present invention, illustrating the first pipe being blocked. 
         FIG. 3  is a sectional view of the right angle valve in accordance with an embodiment of the present invention, illustrating the first pipe being gradually opened. 
         FIG. 4  is a sectional view of the right angle valve in accordance with an embodiment of the present invention, illustrating the first pipe being completely opened and the disc spring being covered. 
         FIG. 5  is a sectional view of the right angle valve in accordance with a second embodiment of the present invention, illustrating the first pipe being blocked and the sleeve being fixedly combined with the sealing member. 
         FIG. 6  is a sectional view of the right angle valve in accordance with the second embodiment of the present invention, illustrating the first pipe being completely opened and the disc spring being covered. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The aforementioned and further advantages and features of the present invention will be understood by reference to the description of the preferred embodiment in conjunction with the accompanying drawings where the components are illustrated based on a proportion for explanation but not subject to the actual component proportion. 
     Referring to  FIG. 2  to  FIG. 4 , the right angle valve  100  provided by an embodiment of the present invention comprises a valve body  10 , a fixing member  20 , a disc spring  30 , a cover body  40 , and a piston member  50 . 
     The valve body  10  is a three way pipe, comprising a cavity  11  and a first pipe  12  and a second pipe  13  that are connected with the cavity  11 . The first pipe  12  and the cavity  11  are arranged in an axial alignment. The first pipe  12  and the second pipe  13  form a right angle arrangement. 
     The fixing member  20  is formed in a barrel shape structure and fixed on one end of the valve body  10  away from the first pipe  12 . The fixing member  20  is provided with a combining end  21  inserted into the cavity  11 . 
     The disc spring  30  has one end thereof combined with a combining end  21  of the fixing member  20 , while the other end thereof is connected with a sealing member  31  for sealing the inner end of the first pipe  12 , so as to optionally open or close to allow or block the connection between the first pipe  12  and the cavity  11 . 
     The cover body  40  is fixed on one end of the valve body  10  away from the first pipe  12  and arranged on the outer side of the fixing member  20 . The cover body  40  includes an inner space  41 . An air inflow portion  42  is disposed on the cover body  40  adjacent to the valve body  10 . The air inflow portion  42  comprises an air inlet  421  which is connected with the inner space  41  for contacting an outer air source, such that the air is input into the inner space  41 . Furthermore, one end of the cover body  40  away from the air inflow portion  42  is provided with a sealed end  43 . The sealed end  43  includes a silencing member  44 , wherein the inner end of the silencing member  44  is connected with the inner space  41  for balancing the inner pressure and the outer pressure of the cover body  40 . In addition, the sealed end  43  of the cover body  40  is provided with a positioning recess  45  which is connected with the inner space  41  and the inner end of the silencing member  44 . 
     The piston member  50  is slidingly disposed inside the cover body  40 . In an embodiment of the present invention, the piston member  50  includes a piston body  51  which is slidingly disposed in the inner space  41 . The piston body  51  is combined with a controlling shaft  52 . The controlling shaft  52  pass through the air inflow portion  42  and the fixing member  20 , wherein one end of the controlling shaft  52  is combined with the sealing member  31 . When the piston member  50  moves, the sealing member  31  optionally opens or closes the first pipe  12 . Further, the piston body  51  is axially and concavely provided with a spring recess  53  which receives a spring  54 , such that the spring  54  is disposed between the spring recess  53  and the positioning recess  45  of the sealed end  43 , thereby providing the recovering function of the piston member  50 . In addition, a positioning member  55  is disposed in the spring recess  53 , and the positioning member  55  is formed in a T shape, so as to be inserted into the spring  54  in order to position the spring  54 . 
     An embodiment of the present invention further comprises a covering measure. When the piston member  50  drives the sealing member  31  to move away from the inner end of the first pipe  12  and enables the air to flow, the disc spring  30  is covered, so that the disc spring  30  is prevented from being exposed to the flowing air. As a result, the disc spring  30  is not stuck and attached by foreign objects or dust in the air, facilitating the normal operation of the disc spring  30 . 
     The covering measure includes a sleeve  60 , which comprises a fixing end  61  and a free end  62 . The sleeve  60  is mounted around the fixing member  20 , such that the fixing end  61  is fastened with the fixing member  20  by use of screws or bolts, and the free end  62  surrounds the combining end  21  of the fixing member  20  and the disc spring  30 . Also, the outer diameter of the free end  62  of the sleeve  60  is substantially equal to the outer diameter of the sealing member  31 . When the sealing member  31  moves away from the inner end of the first pipe  12  to the largest distance, one end of the sealing member  31  away from the inner side of the first pipe  12  contacts the free end  62 , forming a blockage status. Also, the sealing member  31  seals the free end  62  of the sleeve  60 , whereby the disc spring  30  is completely compressed into the sleeve  60 . Therefore, a covering and protecting effect is provided upon the disc spring  30 . 
     Furthermore, an embodiment of the present invention includes a heating device  70 , which heats the valve body  10  by in a contact or non-contact manner. By use of heating, when the first pipe  12  is opened, the micro size foreign objects or matters are burned in a high temperature environment. Therefore, foreign objects do not stick or accumulate in the pipe. 
     Also, a heat insulating plate  71  is disposed between the valve body  10  and the cover body  40 . When the heating device  70  heats the valve body  10 , the heat is transmitted to the cover body  40 , so as to prevent the adverse effects due to the operation of the piston member  50  and the air leakage from happening. 
     Referring to  FIG. 3  and  FIG. 4 , the piston member  50  moves to open the first pipe  12 . As shown by  FIG. 3 , by inputting a high pressure air from the outside, when the piston member  50  pushes the piston body  51  to move toward the sealed end  43  of the cover body  40 , the piston body  51 , by use of the controlling shaft  52 , drives the sealing member  31  to gradually move away from the inner end of the first pipe  12 , whereby the connection between the first pipe  12  and the second pipe  13  is established. At the meantime, the disc spring  30  bears a force to be compressed. As shown by  FIG. 4 , when the piston body  51  reaches the movement limitation, the first pipe  12  is completely opened, and the inner surface of the sealing member  31  resists against the free end  62  of the sleeve  60  to form a blockage structure, such that the disc spring  30  is completely covered in the sealing member  31  and the sleeve  60 . Therefore, when the air is flowing, the disc spring  30  is prevented from being exposed in the flowing air, whereby the disc spring  30  is not stuck and attached by foreign objects and dust in the air, thus facilitating the normal operation of the disc spring  30 . Further, when the valve is closed to block the high pressure air from the outside, by use of the resilient force provided by the disc spring  30  and the spring  54 , the position of the piston member  50  is recovered, such that the first pipe  12  is blocked by the sealing member  31  to block the flowing air. 
     Referring to  FIG. 5  and  FIG. 6  illustrating another embodiment of the present invention, the elements/structures identical and similar to the corresponding elements cited in the previous drawing are marked with identical numberings. The covering measure includes a sleeve  80  which is fixedly combined with the sealing member  31  and surrounds the disc spring  30 . The sleeve  80  is allowed to be integrally formed with the sealing member  31 . Also, the combining end  21  of the fixing member  20  is provided with a held portion  22 . 
     When the piston member  50  drives the sealing member  31  to open against the first pipe  12 , the sleeve  80  gradually moves along with the sealing member  31  toward the fixing member  20 ; when the sealing member  31  is completely open against the first pipe  12 , the sleeve  80  resists against the held portion  22  of the fixing member  20 , whereby the disc spring  30  is completely covered, achieving the aforementioned covering and protecting effect. 
     To sum up, by use of the covering measure, when the sealing member  31  opens to allow the air flowing, the disc spring  30  is covered in the sleeve  60  or sleeve  80 , such that the disc spring  30  is prevented from being stuck or attached by foreign objects in the flowing air, assuring the normal operation of the disc spring  30 . 
     Furthermore, through the heating device  70  heating the valve body  10 , when the first pipe  12  is opened, the foreign matters or objects in the valve body  10  are burned by the high temperature heat, preventing the foreign objects from sticking or accumulating in the pipe. 
     Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.