Patent Publication Number: US-2023135481-A1

Title: Connection device

Description:
TECHNICAL FIELD 
     The present disclosure relates to a connection device and, more particularly, to a connection device capable of easily connecting a pipe or the like. 
     BACKGROUND ART 
     In general, a connection device, for connecting pipes or the like, connects a plurality of pipes by applying a coupling method such as welding. Accordingly, the connection device is used to extend a length of a pipe or to change a flow direction of a fluid whose movement is guided through the pipe. 
     In conventional connection devices, a welding method is mainly applied, so that expensive welding equipment may be required and the quality of the connection device may vary depending on an operator. 
     In addition, when a fusion method is used in a conventional connection device for connecting pipes, the conventional connection device requires expensive equipment and an expert for application of compression, wedge, or the like. Therefore, there is a need to improve the conventional connection device. 
     Background art of the present disclosure is disclosed in Korean Patent Publication No. 10-1863582 (registered on May 28, 2018, entitled “Pipe connection device”). 
     DISCLOSURE 
     Technical Problem 
     In view of improving the above problems, the present disclosure provides a connection device having a simple configuration which makes it easy to connect pipes, and capable of stably connecting pipes of various materials. 
     Technical Solution 
     A connection device according to the present disclosure includes: a housing part into which a pipe is inserted; a fixing part which is inserted between the pipe and the housing part in response to rotation to fix the pipe; and a sealing part provided between the housing part and the pipe to seal between the housing part and the pipe. 
     In the present disclosure, the housing part includes: a housing body portion into which the pipe is inserted; and a housing guide portion which is connected to the housing body portion and has an inner diameter gradually decreased as going toward the housing body portion. 
     In the present disclosure, the housing body portion includes: a housing body member in which a housing body hole portion into which the pipe is inserted is formed; and a pipe insertion limiting portion protruding from the housing body hole portion to limit the degree of insertion of the pipe. 
     The housing guide portion in the present disclosure includes: a pipe insertion portion into which the pipe is inserted; and a pipe guide portion which connects the pipe insertion portion and the housing body portion, and is formed to have an inner diameter gradually decreased as going toward the housing body portion. 
     In the present disclosure, the housing part may further include a pressing protrusion protruding from an inner peripheral surface of the housing body portion or the pipe guide portion to press the pipe or the fixing part moving toward the housing body hole portion. 
     In the present disclosure, the fixing part includes: a rotating member rotatably coupled to the housing part and moved in a length direction of the housing part in response to rotation; and a fixing member connected to the rotating member, and provided in a shape in which an outer diameter is gradually decreased in an insertion direction of the pipe. 
     In the present disclosure, the rotating member is screw-coupled with the housing part. 
     In the present disclosure, the fixing member is deformed as being moved in contact with the housing guide portion in response to rotation of the rotation member to press the pipe. 
     In the present disclosure, the fixing member includes a plurality of fixing members arranged in a circumferential direction of the rotating member. 
     In the present disclosure, the rotating member and the fixing member are integrally formed. 
     Advantageous Effects 
     The connection device according to the present disclosure can easily connect various pipes with a simple configuration. 
     In addition, the connection device according to this disclosure can accurately control and indicate the degree of insertion of the pipe inserted in the housing part by applying the pipe insertion restriction portion and a pipe insertion indication portion to the housing part. 
     Further, the connection device according to the present disclosure can stably fix the pipe and prevent the pipe from sagging or the like by applying the fixing part and the fixing reinforcement part. 
     Furthermore, the connection device according to the present disclosure can prevent the fluid guided along the pipe from leaking between the housing part and the pipe by applying the sealing part between the housing part and the pipe. 
     Moreover, the connection device according to the present disclosure can prevent the fixing part from being loosened by applying the fixing locking portion, the housing locking portion, the fixing reinforcement part, and the loosening prevention part to stably maintain the connection state of the pipe. 
    
    
     
       DESCRIPTION OF DRAWINGS 
         FIG.  1    is a cross-sectional view illustrating a connection device according to one embodiment of the present disclosure. 
         FIG.  2    is a block diagram illustrating a configuration of the connection device according to one embodiment of the present disclosure. 
         FIG.  3    shows a cross-sectional view and a side view illustrating a housing part according to one embodiment of the present disclosure. 
         FIG.  4    shows a cross-sectional view and a side view illustrating a fixing part according to one embodiment of the present disclosure. 
         FIG.  5    is a cross-sectional view illustrating a fixing part according to another embodiment of the present disclosure. 
         FIG.  6    shows a cross-sectional view and a side view illustrating a fixing reinforcement part according to one embodiment of the present disclosure. 
         FIG.  7    is a cross-sectional view illustrating a state in which a housing part and a sealing part are coupled to each other according to one embodiment of the present disclosure. 
         FIG.  8    is a cross-sectional view illustrating a state in which the fixing part and the fixing reinforcement part are coupled to the housing part according to one embodiment of the present disclosure. 
         FIG.  9    is a cross-sectional view illustrating a state in which a pipe is inserted into the housing part in the connection device according to one embodiment of the present disclosure. 
         FIG.  10    is a cross-sectional view illustrating that the fixing part and the fixing reinforcement part are rotated to fix the pipe in the connection device according to one embodiment of the present disclosure. 
         FIG.  11    is a cross-sectional view illustrating that a loosening prevention part is coupled to the housing part and the fixing part in the connection device according to one embodiment of the present disclosure. 
     
    
    
     MODE FOR DISCLOSURE 
     Hereinafter, one embodiment of a connection device according to the present disclosure will be described with reference to the accompanying drawings. In the description, thicknesses of lines or sizes of components shown in the drawings may be exaggerated for clarity and convenience of explanation. 
     In addition, the terms to be described below are terms defined in consideration of functions in the present disclosure, which may vary depending on intention or practices of a user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification. 
       FIG.  1    is a cross-sectional view illustrating a connection device according to one embodiment of the present disclosure, and  FIG.  2    is a block diagram illustrating a configuration of the connection device according to one embodiment of the present disclosure. 
       FIGS.  3 A and  3 B  are respectively a cross-sectional view and a side view illustrating a housing part according to one embodiment of the present disclosure. 
     Referring to  FIGS.  1  to  3 B , the connection device  1  according to one embodiment of the present disclosure includes a housing part  100 , a fixing part  300 , and a sealing part  500 . 
     One or more pipes  10  are inserted into the housing part  100 . Here, the pipe  10  inserted into the housing part  100  includes a pipe for guiding movement of a fluid, and may be made of a material such as metal or synthetic resin. The housing part  100  according to the present embodiment includes a housing body portion  110  and a housing guide portion  130 . 
     A pipe  10  is inserted into the housing body portion  110 . In the present embodiment, the housing body portion  110  is exemplified as being formed in a substantially cylindrical shape, and the pipe  10  is inserted therein. 
     Besides, the housing body portion  110  may be manufactured in a shape in which a plurality of cylinders having different diameters are connected depending on the shape and number of the pipes  10  to be inserted, or may be formed in a ‘T’ shape or the like. In the present embodiment, the housing body portion  110  includes a housing body member  111  and a pipe insertion restriction portion  113 . 
     The housing body member  111  has a housing body hole portion  112  through which the pipe  10  is inserted, and the pipe  10  is inserted into the housing body hole portion  112 . In the present embodiment, the housing body member  111  is made of a metal material and may be connected to a neighboring housing body member  111  by welding, screw coupling, or the like. 
     The pipe insertion restriction portion  113  is formed to protrude from the housing body hole portion  112  to limit the insertion degree of the pipe  10 . In the present embodiment, the pipe insertion restriction portion  113  is formed in a substantially ring shape along an inner peripheral surface of the housing body hole portion  112 , and is provided in contact with a leading end of the pipe  10  depending on the degree of insertion of the pipe  10  to limit the extent to which the pipe  10  is inserted into the housing body member  111 . 
     In the present embodiment, the housing body portion  110  further includes a pipe insertion indicating portion  115 . The pipe insertion indication portion  115  is indicated on an outer peripheral surface of the housing body member  111  at a position corresponding to the pipe insertion restriction portion  113  so that the position of the leading end of the pipe  10  inserted in the housing body member  111  can be checked from the outside of the housing body member  111 . 
     In the present embodiment, when the housing body member  111  is coupled by welding or the like at a position where the pipe insertion restriction portion  115  is applied, the pipe insertion indication portion  115  may have a groove formed to have the same width as that of the pipe insertion restriction portion  115  with reference to a portion where the housing body members  111  are coupled to each other, for example, a welding line. 
     In addition, the pipe insertion indication portion  115  may be indicated by coloring the outer peripheral surface of the housing body member  111  with paint or the like. 
     When the pipe insertion indication portion  115  is applied, an operator may accurately check the degree of insertion of the pipe  10 . Accordingly, in the inserting operation of the pipe  10  or the like, before the pipe  10  is inserted into the housing body member  111 , the pipe  10  can be accurately inserted or mounted by indicating a distance from the pipe insertion indication portion  115  to an end of the housing body member  111  on the pipe  10 . 
     Accordingly, by allowing the operator to easily check the position of the pipe  10 , the pipe insertion indication portion  115  can facilitate the operation for confirming the degree of insertion of the pipe  10  at the time of operation of management, disassembly, etc. of the connection device  1 , and enable the accurate insertion of the pipe  10  to prevent damage to the pipe  10  and the like. 
     In addition, the connection device  1  in the present embodiment can insert the pipe  10  to an accurate position, thereby minimizing the front and rear clearance of the pipe  10  to ensure sealing between the housing body member  111  and the pipe  10 . Further, the connection device  1  in the present embodiment can secure uniform assembly regardless of the skill level of the operator by applying the pipe insertion indication portion  115 . 
     The housing guide portion  130  is connected to the housing body portion  110  and is formed so that an inner diameter thereof is gradually decreased as going toward the housing body portion  110 . Accordingly, in the present embodiment, the housing guide portion  130  allows the fixing part  300  to press the pipe  10  by allowing a front end portion of the fixing part  300  to contract while moving along an inner surface of the housing guide portion  130 . 
     An inclination angle of the inner inclined surface of the housing guide portion  130  may be equal to or greater than an inclination angle of the front end portion of the fixing part  300  to increase the deformation of the front end portion of the fixing part  300 . 
     Accordingly, in the present embodiment, when the front end portion of the fixing part  300  moves along the inner inclined surface of the housing guide portion  130 , the front end portion of the fixing part  300  contracts to compress and fix the pipe  10 . In the present embodiment, the housing guide portion  130  includes a pipe insertion portion  131  and a pipe guide portion  133 . 
     An opening is formed in the pipe insertion part  131  and the pipe  10  is inserted into the pipe insertion portion  131  through the opening. In the present embodiment, the pipe insertion part  131  is formed in a substantially cylindrical shape so that the pipe  10  may be inserted therein, and a side of the pipe insertion portion  131  opposite to the opening is connected to the pipe guide portion  133 . 
     In the present embodiment, the pipe insertion part  131  has a screw thread formed on an inner peripheral surface thereof and is screw-coupled with the fixing part  300 , so that when the fixing part  300  rotates with respect to the housing part  100 , the fixing part  300  can move in a longitudinal direction of the housing part  100 . 
     The pipe guide portion  133  connects the pipe insertion part  131  and the housing body portion  110 , and is formed to have an inner diameter gradually decreased toward the housing body portion  110 . In the present embodiment, one end of the pipe guide portion  133  is connected to the pipe insertion part  131 , and the other end having an inner diameter smaller than that of the one end of the pipe guide portion  133  is connected to the housing body portion  110 . 
     Since the inner diameter of the pipe guide portion  133  is formed to be gradually decreased along the insertion direction of the pipe  10 , the front end portion of the fixing part  300  moving along the inner surface of the pipe guide portion  133  can be contracted. 
     In the present embodiment, the housing part  100  further includes a pressing protrusion  150 . The pressure protrusion  150  protrudes from an inner peripheral surface of the housing body portion  110  or the pipe guide portion  133  and presses the pipe  10  or the fixing part  300  moving toward the housing body hole portion  112 . 
     In the present embodiment, the housing body portion  110  and the housing guide portion  130  may include a metal material and may be integrally formed. 
     In the present embodiment, the housing part  100  may further include a fixing locking portion  170 . The fixing locking portion  170  is formed in the housing guide portion  130 , specifically, the pipe insertion part  131 , and is configured to lock the fixing part  300  depending on the degree of insertion of the fixing part  300  into the housing body portion  110  or the housing guide portion  130 . 
     In the present embodiment, the fixing locking portion  170  includes a fixing locking body  171  protruding from the housing guide portion  130  in the insertion direction of the pipe  10 , and a fixing locking member  173  protruding from the fixing locking body  171  in a direction intersecting with the protruding direction of the fixing locking body  171 . 
       FIGS.  4 A and  4 B  are respectively a cross-sectional view and a side view illustrating the fixing part according to one embodiment of the present disclosure, and  FIG.  5    is a cross-sectional view illustrating a fixing part according to another embodiment of the present disclosure. 
     Referring to  FIGS.  4 A,  4 B and  5   , the fixing part  300  is inserted between the pipe  10  and the housing part  100  in response to rotation and fixes the pipe  10  to the housing part  100 . In the present embodiment, the fixing part  300  includes a rotation member  310  and a fixing member  330 . 
     The rotation member  310  is screw-coupled with the housing part  100  and moves in the longitudinal direction of the housing part  100  in response to rotation. In the present embodiment, the rotation member  310  includes a rotation coupling part  311  and a rotation body part  313 . 
     A screw thread is formed on the rotation coupling part  311  to be screw-coupled with the housing part  100 . The degree to which the rotation coupling part  311  is inserted in the housing part  100  is adjusted depending on the degree to which the rotation coupling part  311  is screw-coupled with the housing part  100 . 
     Referring to  FIGS.  4 A and  4 B , a screw thread is formed on an outer peripheral surface of the rotation coupling part  311  and may be screw-coupled with the outer peripheral surface of the housing part  100 . In addition, as shown in  FIG.  5   , the rotation coupling part  311  may be provided to surround both the inner and outer sides of the opening portion of the housing part  100  and may be screw-coupled with the outer peripheral surface of the housing part  100 . 
     The rotation body part  313  may be connected to the rotation coupling part  311  and may have an outer diameter larger than an inner diameter of the opening of the housing part  100  to limit the insertion degree of the rotation coupling part  311 . 
     In addition, the rotating body part  313  has an outer peripheral surface formed in a substantially polygonal shape to facilitate work by preventing a tool from slipping and improving the transmission of force when being rotated with the tool or the like. 
     In the present embodiment, the fixing part  300  further includes a housing locking portion  370  to prevent the rotating member  310  or the fixing member  330  from being separated from the housing part  100 . 
     In the present embodiment, the housing locking portion  370  is provided in a shape corresponding to the fixing locking portion  170  at a position corresponding to the fixing locking portion  170 , and when the rotating member  310  is inserted into the housing part  100  by a preset distance or more, the housing locking portion  370  is engaged with the fixing locking portion  170 . In the present embodiment, the housing locking portion  370  includes a housing locking insertion portion  371  and a housing locking member  373 . 
     The housing locking insertion portion  371  is concavely formed in the rotation member  310 , and when the rotation member  310  moves by a preset distance or more in the insertion direction of the pipe  10 , the fixing locking portion  170  is inserted into the housing locking insertion portion  371 . 
     Since the housing locking member  373  is concavely formed in a shape corresponding to the fixing locking member  173  to lock it at a position corresponding to the fixing locking member  173 , the fixing locking member  173  is fitted in the housing locking member  373  to prevent the fixing part  300  including the rotation member  310  from moving in the housing part  100 . 
     In the present embodiment, it has been described that the fixing locking portion  170  is formed to protrude, and the housing locking portion  370  is concavely formed to correspond to the shape of the fixing locking portion  170 , but it goes without saying that the shapes of the fixing locking portion  170  and the housing locking portion  370  may be changed within the technical idea of the present disclosure that the fixing locking portion  170  and the housing locking portion  370  are engaged with each other to prevent relative movement thereof. 
     That is, the housing locking portion  370  may protrude from the rotating member  310 , and the fixing locking portion  170  may be concavely formed in the housing guide portion  130  so that they are engaged with each other. 
     In the present embodiment, the fixing member  330  is connected to the rotation member  310 , and is provided in a shape in which an outer diameter thereof gradually decreases as it goes in the insertion direction of the pipe  10 , and is interposed between the housing unit  100  and the pipe  10 . In the present embodiment, the fixing member  330  is deformed while moving in contact with the housing guide portion  130  in response to the rotation of the rotation member  310  to press the pipe  10 . 
     In the present embodiment, a plurality of fixing members  330  are provided and arranged to be spaced apart from each other at equal intervals in a circumferential direction of the rotating member  310 . 
     Since the plurality of fixing members  330  are arranged to be spaced apart, when the front end portions of the fixing members  330  receives a force while moving in contact with the housing guide  130 , a gap between the fixing members  330  is reduced, which prevents the fixing members  330  from being twisted by the deformation of the fixing members  330  and enables the fixing members  330  to press the pipe  10 . 
     In the present embodiment, the rotating member  310  and the fixing member  330  includes a metal material and are integrally formed. 
     The sealing part  500  is provided between the housing part  100  and the pipe  10 , and is deformed when the pipe  10  is inserted into the housing part  100  to seal between the pipe and the housing part  100 . In the present embodiment, the sealing part  500  includes an elastic material such as synthetic resin or the like, and when the pipe  10  is inserted into the housing part  100 , the sealing part  500  is deformed to seal a gap between the pipe  10  and the housing part  100 . 
     In particular, in the present embodiment, the sealing part  500  includes various materials such as NBR, EPDM or the like, so that sealing performance may be maintained even in case of dents during assembly, or a medium/high pressure. 
     In the present embodiment, the sealing part  500  is formed in a substantially ‘ring’ shape and is mounted on the housing part  100  in a manner that is inserted into a groove concavely formed on the inner peripheral surface of the housing part  100 . 
       FIGS.  6 A and  6 B  are respectively a cross-sectional view and a side view illustrating a fixing reinforcement part according to one embodiment of the present disclosure. Referring to  FIGS.  1 ,  2 ,  6 A and  6 B , in the present embodiment, the connection device  1  may further include a fixing reinforcement part  700 . The fixing reinforcement part  700  is inserted between the fixing part  300  and the pipe  10  to press the fixing part  300 . 
     Accordingly, the fixing reinforcement part  700  prevents the fixing part  300  from being released from the state in which the fixing part  300  is coupled to the housing part  100  or the pipe  10 , and prevents the pipe  10  from sagging when the pipe  10  is connected. In the present embodiment, the fixing reinforcement part  700  includes a reinforcing rotation member  710  and a reinforcing fixing member  730 . 
     The reinforcing rotation member  710  is screw-coupled with the fixing part  300 , and is moved along the longitudinal direction of the housing part  100  in response to rotation and screw-coupled with the fixing part  300 . In the present embodiment, the reinforcing rotation member  710  includes a reinforcing rotation coupling portion  711  and a reinforcing rotation body portion  713 . 
     The reinforcing rotation coupling portion  711  has a screw thread formed on an outer peripheral surface thereof and is screw-coupled to the fixing part  300 . The degree to which the reinforcing rotation coupling part  711  is inserted in the fixing part  300  is adjusted depending on the degree to which the reinforcing rotation coupling part  711  is screw-coupled with the fixing part  300 . 
     The reinforcing rotation body portion  713  is connected to the reinforcing rotation coupling part  711  and has an outer diameter larger than an inner diameter of a hole formed in the fixing part  300  to limit the insertion degree into the fixing part  300 . 
     In addition, the reinforcing rotation body portion  713  has an outer peripheral surface formed in a substantially polygonal shape to facilitate work by preventing a tool from slipping and improving the transmission of force when being rotated with the tool or the like. 
     The reinforcing fixing member  730  is connected to the reinforcing rotation member  710 , and is provided in a shape in which an external diameter thereof gradually decreases as it goes in the insertion direction of the pipe  10 , and is interposed between the fixing part  300  and the pipe  10 . 
     In the present embodiment, the reinforcing fixing member  730  is deformed while being moved in contact with the inner inclined surface of the fixing part  300  in response to the rotation of the reinforcing rotating member  710  to press the pipe  10 . 
     In the present embodiment, a plurality of reinforcing fixing members  730  are provided and are arranged to be spaced apart from each other at equal intervals in a circumferential direction of the reinforcing rotating member  710 . 
     Since a plurality of reinforcing fixing members  730  are arranged to be spaced apart, when front end portions of the reinforcing fixing members  730  receive a force while moving in contact with the inner inclined surface of the fixing part  300 , a gap between the reinforcing fixing members  730  is reduced, which enables the reinforcing fixing member  730  to press the pipe. In the present embodiment, the reinforcing rotation member  710  and the reinforcing fixing member  730  includes a metal material and are integrally formed. 
     In the present embodiment, the connection device  1  may further include a loosening prevention part  900 . The loosening prevention part  900  prevents the fixing part  300  from rotating with respect to the housing part  100  in a manner that passes through the housing part  100  to press the fixing part  300  (see  FIGS.  1  and  2   ), or conversely, passes through the fixing part  300  to press the housing part  100  (See  FIG.  5   ). 
     Alternatively, the loosening prevention part  900  prevents the fixing part  300  from rotating with respect to the housing part  100  in a manner that passes through the fixing part  300  to press the housing part  100  (See  FIG.  5   ), or the like. 
     In the present embodiment, the loosening prevention part  900  includes a loosening prevention penetration portion  910  and a loosening prevention penetration adjustment portion  930 . 
     The loosening prevention penetration part  910  passes through the fixing part  300  or the housing part  100  and has a screw thread formed on an outer peripheral surface thereof. 
     The loosening prevention penetration adjustment portion  930  is connected to the loosening prevention penetration portion  910  and has a larger diameter than that of the loosening prevention penetration portion  910  to adjust the degree to which the loosening prevention penetration portion  910  is coupled. 
     One or more loosening prevention parts  900  are provided on a circumference with respect to the rotation axis of the housing part  100  or the fixing part  300 . When a plurality of loosening prevention parts  900  are provided, they are arranged at equal intervals to stably fix the fixing part  300  to the housing part  100 . In the present embodiment, the loosening prevention part  900  may be exemplified as a tapping bolt with a flat head. 
       FIG.  7    is a cross-sectional view illustrating a state in which the housing part and the sealing part are coupled to each other according to one embodiment of the present disclosure,  FIG.  8    is a cross-sectional view illustrating a state in which the fixing part and the fixing reinforcement part are coupled to the housing part according to one embodiment of the present disclosure, and  FIG.  9    is a cross-sectional view illustrating a state in which a pipe is inserted into the housing part in the connection device according to one embodiment of the present disclosure. 
       FIG.  10    is a cross-sectional view illustrating that the fixing part and the fixing reinforcement part are rotated to fix the pipe in the connection device according to one embodiment of the present disclosure, and  FIG.  11    is a cross-sectional view illustrating that the loosening prevention part is coupled to the housing part and the fixing part in the connection device according to one embodiment of the present disclosure. 
     Hereinafter, the operating principle and effect of the connection device  1  according to one embodiment of the present disclosure will be described with reference to  FIGS.  7  to  11   . 
     First, the sealing part  500  is pushed into the inside of the housing part  100  so that the sealing part  500  is fitted into the groove formed on the inner surface the housing part  100 . Grease, and the like may be applied to the sealing part  500  so that airtightness between the pipe  10  and the housing part  100  can be maintained (see  FIG.  7   ). 
     When the sealing part  500  is mounted on the housing part  100 , the fixing part  300  and the housing part  100  are assembled with rotation. In this case, the assembling is temporarily performed through an manual operation by an operator, so that the pipe  10  may be inserted into the housing  100  through the fixing reinforcement part  700  and the fixing part  300  (see  FIG.  8   ). 
     When the fixing part  300  and the fixing reinforcement part  700  are temporarily assembled to the housing part  100 , the pipe  10  is inserted through the fixing reinforcement part  700  and the fixing part  300  through the hollow hole formed therein, and the leading end of the pipe  10  is brought into contact with the pipe insertion restriction portion  113 . The leading end of the pipe  10  may be chamfered before assembling so that the pipe  10  can stably reach a preset position (see  FIG.  9   ). 
     In addition, the operator can indirectly check whether the pipe  10  has reached the preset position by inserting the pipe  10  with reference to the pipe insertion indication portion  115  indicated on the outer surface of the housing  100 . 
     When the pipe  10  is inserted into the housing part  100 , the operator rotates the fixing part  300  with a tool such as a spanner so that the fixing part  300  moves in the longitudinal direction of the housing part  100  while being screw-coupled with the housing part  100 , and the fixing member  330  compresses and fixes the pipe  10 . In addition, due to the screw thread formed on the inner peripheral surface of the fixing part  300 , a screw thread is formed on the outer peripheral surface of the pipe  10 , so that the fixing part  300  and the pipe  10  are also strongly fixed by screw coupling. 
     When the screw coupling between the fixing part  300  and the housing part  100  is completed, by rotating the fixing reinforcement part  700  with respect to the fixing part  300  to strengthen the screw coupling with the fixing part  300 , the coupling between the fixing part  300  and the housing part  100  is strengthened (see  FIG.  10   ). 
     In addition, by additionally fixing the housing part  100  and the fixing part  300  using the loosening prevention part  900 , the coupling between the fixing part  300  and the housing part  100  is prevented from being loosened (refer to  FIG.  11   ). 
     Accordingly, the connecting device  1  according to the present embodiment can easily connect various pipes  10  with a simple configuration. Further, the connection device  1  according to the present embodiment can accurately control and indicate the insertion degree of the pipe  10  inserted into the housing  100  by applying the pipe insertion restriction portion  113  and the pipe insertion indication portion  115  to the housing part  100 . 
     In addition, the connection device  1  according to the present embodiment can stably fix the pipe  10  and prevent the pipe  10  from sagging by applying the fixing part  300  and the fixing reinforcement part  700 . 
     Further, the connection device  1  according to the present embodiment can prevent the fluid guided along the pipe from leaking between the housing part  100  and the pipe  10  by applying the sealing part  500  between the housing part  100  and the pipe  10 . 
     Furthermore, the connection device  1  according to the present embodiment prevents loosening of the fixing part  300  by applying the fixing part  170 , the housing locking portion  370 , the fixing reinforcement part  700 , and the loosening prevention part  900 , so that the connection state of the pipe  10  can be stably maintained. 
     Although the present disclosure has been described with reference to the embodiments shown in the drawings, this is merely an example, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. 
     Accordingly, the technical protection scope of the present disclosure should be determined by the following claims.