Quick coupling with pressure relief function

Abstract

The application discloses a quick connector with pressure relief function, which comprises a connector body and a lock catch pressure relief assembly connected with each other, a valve seat and a valve core movably arranged in the connector body, and a control sleeve sleeved on the connector body and the lock catch pressure relief assembly, the control sleeve controls axial position switching of the valve seat between the lock catch pressure relief assembly and the valve core, so that one end of the valve seat is in sealed cooperation with the valve core, the other end of the valve seat is in a separated state with the lock catch pressure relief assembly, or one end of the valve seat is in a separated state with the valve core, and the other end of the valve seat is in sealed cooperation with the lock catch pressure relief assembly. The quick connector with pressure relief function disclosed by the application realizes air inlet end sealing, air outlet end pressure relief and residual gas pressure discharge in the connector through axial movement of the valve seat in the connector body, and is more convenient, faster and safer when the sub body is pulled out.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe quick couplings, in particular to a quick coupling with pressure relief function. BACKGROUND

[0002] A quick coupling is a connecting piece for realizing quick connection and disconnection of a pipeline, and is mainly used for quick installation of gas or liquid pipelines. When a common quick coupling is used in a gas pipeline, the sub body needs to overcome the pressure of compressed air in the pipeline against the valve core when being inserted into the coupling, and the sub body needs to overcome the resistance of the clamping block against the sleeve when being pulled out, and the clamping block is separated from the clamping groove at the moment of pulling the sleeve. The compressed air in the coupling quickly pushes out the sub body, causing a safety hazard. In addition, the quick coupling with a valve in the prior art essentially increases a ball valve on the common quick coupling, which is large in size, long in length, high in cost, and complex in structure, and is difficult to popularize and apply due to high manufacturing cost. The sub body needs to overcome the pressure of fluid in the coupling when being inserted, resulting in the need for a larger pushing force when the coupling is connected. SUMMARY

[0003] The present application aims to provide a quick coupling with pressure relief function, axial movement of the valve seat in the coupling body realizes sealing of the gas inlet end and pressure relief of the gas outlet end, and residual gas pressure in the coupling is discharged, which is more convenient, fast and safe when the sub body is pulled out.

[0004] To solve the above technical problems, the technical solution provided by the present application is as follows: a quick coupling with pressure relief function, comprising a coupling body and a locking pressure relief assembly connected together, a valve seat and a valve core movably arranged in the coupling body, and a control sleeve arranged outside the coupling body and the locking pressure relief assembly, the control sleeve controls axial position switching of the valve seat between the locking pressure relief assembly and the valve core, so that one end of the valve seat is in sealing cooperation with the valve core and the other end is in a separated state from the locking pressure relief assembly, or one end of the valve seat is in a separated state from the valve core and the other end is in sealing cooperation with the locking pressure relief assembly.

[0005] The present application adopts the above technical solution, the valve seat, the valve core and the coupling body form a valve, the control sleeve controls axial movement of the valve seat in the coupling body, when the valve seat approaches and pushes the valve core, one end of the valve seat is in sealing cooperation with the valve core, the valve is closed, at this time, the other end of the valve seat is in a pressure relief state with the locking pressure relief assembly, that is, when the valve seat cooperates with the valve core to close the valve, the locking pressure relief assembly is in a pressure relief state with the valve seat, the fluid pressure in the coupling can be released through pressure relief, when the sub body installed on the locking pressure relief assembly is pulled out, the gas pressure in the coupling is released, the sub body will not be ejected, and the use is safe; when one end of the valve seat is separated from the valve core, the valve is opened, at this time, the other end of the valve seat is in a sealing state with the locking pressure relief assembly, and the gas flow flows from the coupling body to the locking pressure relief assembly and finally enters the sub body.

[0006] Further, the valve core is provided with a valve core spring between the valve core and the inner wall of the joint body, and a valve sealing ring between the valve core and the valve seat. When the valve seat is close to and pushes the valve core, the force of the valve core spring is overcome, so that the valve sealing ring on the valve core is in contact with the end face of the valve seat, thereby being sealed.

[0007] Further, the control sleeve includes a locking sleeve and a rotating sleeve, the locking sleeve is sleeved on the locking pressure relief assembly to control the locking, and the rotating sleeve is rotatably sleeved on the joint body to control the axial movement of the valve seat. The locking sleeve is used to cooperate with the locking pressure relief assembly to lock and unlock the sub inserted into the locking pressure relief assembly, and the rotating sleeve is rotatable on the joint body to drive the axial movement of the valve seat in the joint body.

[0008] Further, the joint body is provided with a slanted groove and an axial guide groove, and the control sleeve is connected with the valve seat through a pin shaft, which is positioned in the slanted groove of the slanted groove part and the guide groove. When the control sleeve is rotated, the position of the pin shaft is located in the closed valve end and the open valve end of the guide groove and the flat groove corresponding to the two ends of the slanted groove, so that the valve seat cooperates with the valve core and the locking pressure relief assembly to be in the closed valve pressure relief or open valve sealing state. When the rotating sleeve is rotated on the joint body, the pin shaft is moved, and in the movement, the pin shaft rotates the slanted groove part when moving in the slanted groove, and in the rotation, the pin shaft moves axially in the guide groove of the joint body, and when moving to the closed valve end, the valve is in the closed state, and at this time, the valve seat is separated from the locking pressure relief assembly to be in the pressure relief state; when the pin shaft moves to the open valve end, the valve is in the open state, and at this time, the valve seat is sealed with the locking pressure relief assembly, and when the pin shaft is located in the closed valve end and the open valve end, it corresponds to the flat groove positions of the two ends of the slanted groove of the slanted groove part.

[0009] Further, the locking pressure relief assembly includes a locking body, a pushing sleeve and a pushing spring, the pushing sleeve and the pushing spring are installed in the locking body, and the pushing spring is arranged between the pushing sleeve and the valve seat. When the sub is inserted into the inside of the locking body, the pushing sleeve is pressed to compress the pushing spring, and through the elastic force of the pushing spring, the sub is locked, and when the sub is pulled out, the pushing spring pushes the pushing sleeve to push the sub out.

[0010] Further, a sealing stop ring is arranged between the locking body and the pushing sleeve. The sealing stop ring is used for sealing between the sub, the pushing sleeve and the locking body when the sub is inserted.

[0011] Further, the valve seat and the locking body are in sliding sealing cooperation through a sealing ring. When the valve seat is extended into the inner wall of the locking body and sealed by the sealing ring, the axial position of the valve seat is in the open valve state, and the sealing between the valve seat and the locking body prevents gas leakage. When the valve seat is away from the locking body and separated therefrom, the sealing ring is separated from the inner wall of the locking body, at this time, the valve seat cooperates with the valve core to close the valve, and the gas pressure in the joint is discharged through the gap between the valve seat and the locking body.

[0012] Further, the valve seat and the push sleeve are in sliding sealing cooperation through a sealing ring. The sliding sealing of the valve seat and the push sleeve through the sealing ring realizes the effect of pressure relief when the valve is closed and sealing when the valve is opened.

[0013] Further, the valve seat and the sealing ring are in sliding sealing cooperation through a sealing ring, and the sealing ring is arranged in a sealing groove of the sealing ring. The sealing ring is arranged in the sealing groove, and the valve seat is in sealing cooperation with the sealing ring when the valve is opened and is separated when the valve is closed to realize pressure relief.

[0014] Further, the valve seat and the push sleeve are in sliding sealing cooperation through a sealing ring, and the valve seat is provided with a through groove passing through the pin shaft. The cooperation of the sealing ring and the push sleeve realizes the sealing and pressure relief of the joint, the through groove is used for passing the pin shaft, and the rotation of the pin shaft is driven by the rotation of the sleeve, and the axial movement of the valve seat is realized under the cooperation of the inclined groove and the guide groove.

[0015] Further, the inclined groove is arranged on the joint body or the lock body, and the guide groove is arranged on the joint body or the lock body.

[0016] Further, the inclined groove is arranged on the joint body or the lock body, and the guide groove is arranged on the joint body or the lock body. Further, the control sleeve is a lock sleeve arranged on the lock body and driving the rotation of the lock body, the outer wall of the valve seat is in sliding sealing cooperation with the inner wall of the lock body through a sealing ring, the outer wall of the valve seat is provided with a pin shaft, and the pin shaft is positioned in the guide groove of the joint body and the inclined groove of the inclined groove piece. The rotation of the lock body is driven by the lock sleeve, the pin shaft is driven to move the valve seat by the inclined groove of the inclined groove piece when the lock body rotates, the valve seat is axially moved in the joint body by the positioning of the pin shaft in the guide groove of the joint body, and the sealing when the valve is opened and the pressure relief when the valve is closed are realized by the sliding cooperation of the sealing ring and the lock body.

[0017] Further, the control sleeve is a lock sleeve arranged on the lock body and driving the rotation of the lock body, the outer wall of the valve seat is in sliding sealing cooperation with the inner wall of the lock body through a sealing ring, the outer wall of the valve seat is provided with a pin shaft, and the pin shaft is positioned in the guide groove of the joint body and the inclined groove of the inclined groove piece. The rotation of the lock body is driven by the lock sleeve, the pin shaft is driven to move the valve seat by the inclined groove of the inclined groove piece when the lock body rotates, the valve seat is axially moved in the joint body by the positioning of the pin shaft in the guide groove of the joint body, and the sealing when the valve is opened and the pressure relief when the valve is closed are realized by the sliding cooperation of the sealing ring and the lock body.

[0018] Further, the lock body is provided with a sealing ring, the valve seat and the sealing ring are in sealing sliding cooperation through a sealing ring, and the valve seat and the joint body are provided with a valve seat spring. The sealing ring plays a sealing role and realizes the purpose of sealing and pressure relief in cooperation with the valve seat.

[0019] Further, the lock sleeve is provided with an axial protrusion, the rotating sleeve is provided with an axial notch, and the axial protrusion and the axial notch correspond to the closed valve state of the valve seat and the valve core.

[0020] Further, the lock sleeve and the joint body are positioned and matched through the axial notch and the axial protrusion. The axial protrusion and the axial notch correspond to the closed valve state, and the sub-body can be pulled out at this time, which has a good guarantee for safe use.

[0021] The present application also has the following beneficial effects: the quick connector is convenient, fast, easy and labor-saving when the sub-body is inserted and pulled out, the gas flow in the joint is released, the sub-body will not fly out and hurt people when pulled out, and the safety in use is high; the joint can be used as a valve, the valve is closed when the sub-body is not pulled out, and the gas source connection between the front end of the sub-body and the rear end of the quick connector is cut off; the quick connector has different working states to meet different working requirements, the valve seat and the valve core are separated when the valve is opened, the valve seat and the lock body are in a sealed state, and the gas flow cannot be released; when the valve is closed, the valve seat and the valve core are combined and sealed, the valve seat and the lock body are in a pressure relief state, the gas flow in the joint flows out from the gap, the gas pressure in the joint is reduced, and the sub-body is conveniently and safely pulled out; through the inclined groove on the inclined groove piece and the guide groove and the valve closing end on the joint body, the valve seat overcomes the pressure of the gas flow when the valve is closed, the sub-body insertion and pulling out are avoided in use, and the use is safer. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a perspective structural schematic diagram of the quick connector of the present application;

[0023] Figure 2 is an assembly structure sectional view of the quick connector of the present application;

[0024] Figure 3 is a sectional structure schematic diagram of the quick connector of the present application when the valve is opened;

[0025] Figure 4 is a sectional structure schematic diagram of the quick connector of the present application when the valve is closed and pressure relief;

[0026] Figure 5 is an explosion structure schematic diagram of the quick connector of the present application;

[0027] Figure 6 is a local structure sectional view of the rotating sleeve of the quick connector of the present application controlling the axial movement of the valve seat;

[0028] Figure 7 is a structure schematic diagram of the joint body of the quick connector of the present application;

[0029] Figure 8 is a partial structure sectional view of the lock body and the joint body assembly of the quick joint of the present application;

[0030] Figure 9 is a sectional structure schematic view of the first embodiment of the quick joint of the present application in use action;

[0031] Figure 10 is a sectional structure schematic view of the first embodiment of the quick joint of the present application in use action;

[0032] Figure 11 is a sectional structure schematic view of the second embodiment of the quick joint of the present application;

[0033] Figure 12 is a sectional structure schematic view of the third embodiment of the quick joint of the present application;

[0034] Figure 13 is a sectional structure schematic view of the fourth embodiment of the quick joint of the present application;

[0035] Figure 14 is a sectional structure schematic view of the fifth embodiment of the quick joint of the present application;

[0036] Figure 15 is a sectional structure schematic view of the sixth embodiment of the quick joint of the present application;

[0037] Figure 16 is a sectional structure schematic view of the sixth embodiment of the quick joint of the present application;

[0038] Figure 17 is a sectional structure schematic view of the sixth embodiment of the quick joint of the present application;

[0039] Figure 18 is a sectional structure schematic view of the seventh embodiment of the quick joint of the present application;

[0040] Figure 19 is a sectional structure schematic view of the seventh embodiment of the quick joint of the present application;

[0041] Figure 20 is a sectional structure schematic view of the seventh embodiment of the quick joint of the present application;

[0042] Figure 21 is a sectional structure schematic view of the seventh embodiment of the quick joint of the present application.

[0043] Explanation of reference numerals: 10 joint body, 101 ball, 102 ball groove, 103 ball hole, 11 valve seat, 111 sealing ring, 112 through groove, 113 valve seat spring, 114 valve seat inclined push surface, 115 valve seat sealing ring, 12 valve core, 121 valve sealing ring, 13 valve core spring, 14 inclined groove member, 141 inclined groove, 142 flat groove, 15 guide groove, 151 closed valve end, 152 open valve end, 16 positioning member, 161 inner protrusion, 162 outer protrusion, 17 positioning block, 2a lock buckle pressure relief assembly, 20 lock buckle body, 201 lock buckle groove hole, 202 elastic ring, 203 lock buckle, 204 axial outer protrusion, 21 push sleeve, 22 push spring, 23 sealing block ring, 211 push inclined push surface, 30 control sleeve, 31 lock buckle sleeve, 311 compression inner protrusion, 312 axial protrusion, 313 inner recess, 32 rotating sleeve, 321 pin shaft, 322 axial notch, 33 lock buckle spring, 4 sub body, 41 sub body groove. DETAILED DESCRIPTION

[0044] The application will be further described below in conjunction with the drawings and specific embodiments.

[0045] Reference Figures 1 to 8 As shown in the drawings, a quick connector with pressure relief function comprises a joint body 10 and a lock buckle pressure relief assembly 2a connected together, the joint body 10 movably has a valve seat 11 and a valve core 12, and a control sleeve 30 is sleeved on the joint body 10 and the lock buckle pressure relief assembly 2a, the control sleeve 30 controls the axial position switching of the valve seat 11 between the lock buckle pressure relief assembly 2a and the valve core 12, so that one end of the valve seat 11 is in sealing cooperation with the valve core 12 and the other end is in a spaced state with the lock buckle pressure relief assembly 2a, or one end of the valve seat 11 is in a spaced state with the valve core 12 and the other end is in sealing cooperation with the lock buckle pressure relief assembly 2a.

[0046] The valve seat 11 is provided with a valve seat sealing ring 115 to seal with the inner wall of the joint body 10.

[0047] The valve core 12 is provided with a valve core spring 13 between the valve core 12 and the inner wall of the joint body 10, and the valve core 12 is provided with a valve sealing ring 121 between the valve core 12 and the valve seat 11.

[0048] The control sleeve 30 comprises a lock buckle sleeve 31 and a rotating sleeve 32, the lock buckle sleeve 31 is sleeved on the lock buckle pressure relief assembly 2a to control the lock buckle, and the rotating sleeve 32 is rotatably sleeved on the joint body 10 to control the axial movement of the valve seat 11.

[0049] The joint body 10 is provided with a slanted groove member 14 and an axial guide groove 15. The control sleeve 30 is connected with the valve seat 11 through a pin shaft 321 which is positioned in the guide groove 15 and the slanted groove 141 of the slanted groove member 14. When the control sleeve 30 rotates, the position of the pin shaft 321 can be located in the closing valve end 151 and the opening valve end 152 of the guide groove 15 and the flat groove 142 corresponding to the two ends of the slanted groove 141, so that the valve seat 11 cooperates with the valve core 12 and the lock buckle pressure relief assembly 2a to present a closed valve pressure relief or an open valve sealing state. The guide groove 15 is in the shape of L, one end of which is the opening valve end 152 and the other end is the closing valve end 151. The direction between the closing valve end 151 and the opening valve end 152 is along the axial direction of the joint body 10. The closing valve end 151 is the end of the guide groove 15 extending in the axial direction of the joint body 10.

[0050] The lock buckle pressure relief assembly 2a includes a lock buckle body 20, a push sleeve 21 and a push spring 22. The push sleeve 21 and the push spring 22 are installed in the lock buckle body 20. The push spring 22 is arranged between the push sleeve 21 and the valve seat 11. The lock buckle body 20 is provided with a lock buckle groove 201 in which a lock buckle 203 is arranged. The lock buckle 203 is sleeved with an elastic ring 202 which is used to make the lock buckle 203 abut and engage in the body groove 41 or reset the lock buckle 203 when the body 4 is pulled out through the action of the elastic ring 202 when the compression inner convex 311 of the lock buckle sleeve 31 is not compressed on the lock buckle 203. When the body 4 is inserted, the lock buckle sleeve 31 is moved towards the joint body 10. After the body 4 is inserted and the lock buckle 203 is buckled in the body groove 41, the lock buckle sleeve 31 is released and reset by the lock buckle spring 33. The compression inner convex 311 on the inner side of the lock buckle sleeve 31 compresses the lock buckle 203 to lock the body 4.

[0051] A sealing stop ring 23 is arranged between the lock buckle body 20 and the push sleeve 21.

[0052] A positioning member 16 is installed on the end of the lock buckle body 20 towards the joint body 10. The inner wall of the positioning member 16 is provided with an inner convex 161 and the outer wall is provided with an outer convex 162. The end of the lock buckle body 20 is provided with a notch which is connected with the inner convex 161 of the positioning member 16. The inner wall of the lock buckle sleeve 31 is provided with an inner recess 313 which is connected with the outer convex 162 of the positioning member 16.

[0053] First embodiment

[0054] Further reference Figure 9 and Figure 10As shown, the valve seat 11 and the locking body 20 are in sliding sealing cooperation through the sealing ring 111. When the sleeve 32 is rotated to drive the pin shaft 321 and the valve seat 11 to move, the sealing ring 111 on the valve seat 11 is in sliding sealing cooperation with the inner wall of the locking body 20. When the sealing ring 111 is located in the inner wall of the locking body 20, the valve seat 11 and the locking body 20 are in a sealed state, at which time the joint is opened, and the gas flows from the joint body 10 into the interior and out of the sub body 4. When the valve seat 11 moves axially to drive the sealing ring 111 to slide out of the inner wall of the locking body 20, the valve seat 11 cooperates with the valve core 12 to seal the joint, and the residual pressure of the gas in the joint can be discharged through the gap between the valve seat 11 and the inner wall of the locking body 20.

[0055] Second embodiment

[0056] Further reference Figure 11 As shown, the valve seat 11 and the pushing sleeve 21 are in sliding sealing cooperation through the sealing ring 111. In this embodiment, the center of the pushing sleeve 21 is provided with a pushing piece which abuts against the end of the valve core 12 inserted into the valve seat 11, for limiting the axial position of the valve core 12, so that when the valve seat 11 and the valve core 12 are separated to open the joint, the axial position of the valve core 12 is fixed, overcoming the gas flow pressure, so that the gas flow cannot push the valve core 12 to approach the valve seat 11 to affect the gas delivery. The outer wall of the valve seat 11 cooperates with the inner wall of the pushing sleeve 21 through the sealing ring 111, so that when the joint is opened, the valve seat 11 and the pushing sleeve 21 are sealed, and when the joint is closed, the gap between the valve seat 11 and the pushing sleeve 21 can be used to discharge the residual gas flow pressure in the joint, facilitating the pulling out of the sub body 4.

[0057] Third embodiment

[0058] Further reference Figure 12 As shown, the valve seat 11 and the sealing stop ring 23 are in sliding sealing cooperation through the sealing ring 111, and the sealing stop ring 23 is provided with a sealing groove 100 in which the sealing ring 111 is arranged. In this embodiment, the sealing stop ring 23 is arranged between the inner wall of the locking body 20 and the pushing sleeve 21, and when the sub body 4 is inserted, it has a certain sealing effect. The sealing groove 100 and the sealing ring 111 on the sealing stop ring 23 are in sliding cooperation with the inner wall of the valve seat 11, and when the valve seat 11 approaches the valve core 12 to seal the joint, the sealing ring 111 separates from the inner wall of the valve seat 11 to discharge the residual gas pressure in the joint. When the valve seat 11 moves away from the valve core 12 to open the joint, the sealing ring 111 is attached to the inner wall of the valve seat 11 to seal, avoiding gas leakage.

[0059] Fourth and fifth embodiments

[0060] Further reference Figure 13 and Figure 14As shown, the valve seat 11 and the push sleeve 21 are slidably sealed together by the sealing ring 111, and the valve seat 11 is provided with a through groove 112 that passes through the pin 321.

[0061] The inclined groove 14 is provided on the connector body 10 or the locking body 20, and the guide groove 15 is provided on the connector body 12 or the locking body 20. For example, Figure 13 As shown, the inclined groove 14 is provided on the connector body 10, and the guide groove 15 is provided in the connector body 10. The connector body 10 is provided with a positioning block 17, and a locking spring 33 is provided between the positioning block 17 and the locking sleeve 31. The inclined groove 14 is fitted onto the outer wall of the connector body 10. The end of the connector body 10 is provided with an external thread, and the end of the locking body 20 is provided with an internal thread. The connector body 10 and the locking body 20 are threadedly connected. Since the end face of the connector body 10 is lower than that of the locking body 20, the positioning block 17 on the connector body 10 is provided so that when the locking spring 33 is compressed and released by moving the locking sleeve 31, one end of the locking spring 33 abuts against the positioning block 17, and the other end provides elastic force to reset the locking sleeve 31.

[0062] like Figure 14 As shown, the inclined groove 14 is provided on the locking body 20, and the guide groove 15 is provided in the locking body 20. The pin 321 is provided in the through groove 112, and its end is positioned in the inclined groove 141 and guide groove 15 of the inclined groove 14. When the rotating sleeve 32 rotates, the valve seat 11 is driven to move axially through the cooperation of the inclined groove 141 and the guide groove 15, thereby achieving the effect of sealing and closing the joint and relieving pressure, as well as opening the joint to seal and prevent leakage.

[0063] In the above embodiments, the locking sleeve 31 is provided with an axial protrusion 312, and the rotating sleeve 32 is provided with an axial notch 322. When the axial protrusion 312 and the axial notch 322 correspond, the valve seat 11 and the valve core 12 are in a sealed closed state.

[0064] In a specific implementation of this invention, the sub-body 4 is inserted into the locking body 20. The groove of the sub-body 4 pushes up the locking buckle 203, and it continues to be inserted into the locking body 20. When the groove of the sub-body 4 corresponds to the locking buckle 203, the elastic ring 202 resets the locking buckle 203 and locks the sub-body in the groove of the sub-body 4. The sub-body 4 abuts against the push sleeve 21. When the valve is opened, the rotating sleeve 32 is turned, which drives the pin 321 to move in the inclined groove 141 and the guide groove 15. When the valve seat 11 moves, it moves axially, and the valve seat 11 moves closer to or further away from the valve core 12. The other end of the valve seat 11 cooperates with the locking body 20, the push sleeve 21, or the sealing ring 23 to form a pressure relief and sealing state.

[0065] The axial protrusion 312 of the locking sleeve 31 corresponds to the axial notch 322 of the rotating sleeve 32, and when the axial protrusion 312 corresponds to the axial notch 322, the joint is in a closed state, at this time, the locking sleeve 31 can slide towards the rotating sleeve 32, and when sliding, the pressing inner protrusion 311 of the locking sleeve 31 is away from the lock, so that the sub body 4 can be pulled out of the lock body 20. When the axial protrusion 312 corresponds to the axial notch 322, the locking sleeve 31 cannot slide towards the rotating sleeve 31, and the axial protrusion 312 abuts against the end surface of the rotating sleeve 322. At this time, due to the position of the locking sleeve 31, the pressing inner protrusion 311 remains on the top of the lock 203, and the sub body 4 is locked, which ensures that the sub body 4 cannot be pulled out when the joint is not closed, and has high safety and practical performance.

[0066] Sixth embodiment

[0067] Further referring to Figure 15 , Figure 16 and Figure 17 , the inclined groove member 14 is provided in two pieces, the end surface of the lock body 20 extends axially with an axial outer protrusion 204, the inclined groove member 14 is installed on the axial outer protrusion 204, the lock body 20 is rotationally connected with the joint body 10, the control sleeve 30 is the locking sleeve 31 sleeved on the lock body 20 and driving it to rotate, the outer wall of the valve seat 11 is in sliding sealing cooperation with the inner wall of the lock body 20 through the sealing ring 111, the outer wall of the valve seat 11 is provided with a pin shaft 321, which is positioned in the inclined groove 141 of the inclined groove member 14 and the guide groove 15 of the joint body 10.

[0068] In this embodiment, the locking sleeve 31 drives the connecting ring 35 to rotate, the connecting ring 35 drives the joint body 10 to rotate, and then the inner wall of the joint body 10 connects the pin shaft 321, so as to control the axial movement of the valve seat 11 through the cooperation of the inclined groove 141 and the guide groove 15, so as to realize the function of opening and closing the joint, when the joint is closed, the residual pressure in the joint is discharged, and the sub body 4 is conveniently and safely pulled out.

[0069] Seventh embodiment

[0070] Further referring to Figures 18 to 21 , the control sleeve 30 is the locking sleeve 31 sleeved on the lock body 20, the lock body 20 is rotationally connected with the joint body 10, the locking sleeve 31 is connected with the lock body 20, and the lock body 20 is fixedly provided with a pushing sleeve 21, which is connected with the valve seat 11 through the pushing inclined pushing surface 211 and the valve seat inclined pushing surface 114.

[0071] The lock body 20 is provided with a sealing stop ring 23, and the valve seat 11 and the sealing stop ring 23 are in sealing sliding cooperation through the sealing ring 111, and the valve seat 11 and the joint body 10 are provided with a valve seat spring 113.

[0072] In the embodiment, the lock body 20 is provided with a sealing baffle 23, the outer wall of the sealing baffle 23 is provided with a sealing groove 100, the sealing groove 100 is provided with a sealing ring 111, the sealing ring 111 is in sealing sliding fit with the inner wall of the valve seat 11, and the valve seat 11 and the inner wall of the joint body 10 are provided with a valve seat spring 113.

[0073] In the sixth and seventh embodiments, the lock sleeve 31 and the joint body 10 are positioned and matched through the axial notch 322 and the axial protrusion 312. The rotating connection between the joint body 10 and the lock body 20 is realized through the ball 101, the ball groove 102 and the ball hole 103. The ball hole 103 is arranged on the joint body 10, the ball 101 is arranged in the ball hole 103, and the ball groove 102 is arranged on the lock body 20. When connected, the lock body 20 can rotate relative to the joint body 10 through the ball 101.

[0074] In summary, the application has been made into actual samples and tested for many times according to the description and the drawings. According to the effect of the use test, it can be proved that the application can achieve the intended purpose, and the practical value is not in doubt. The above examples are only used to facilitate the illustration of the application and do not limit the application in any form. Any person with ordinary knowledge in the art can make equivalent embodiments by making partial changes or modifications within the scope of the technical features disclosed in the application without departing from the technical features of the application, and the equivalent embodiments still belong to the scope of the technical features of the application.

Claims

1. A quick coupling with pressure relief function, comprising a coupling body (10) and a lock catch pressure relief assembly (2a) connected, characterized in that: The joint body (10) movably has a valve seat (11) and a valve core (12), a control sleeve (30) is sleeved on the joint body (10) and the lock buckle pressure relief assembly (2a), the control sleeve (30) controls the axial position switching of the valve seat (11) between the lock buckle pressure relief assembly (2a) and the valve core (12), so that one end of the valve seat (11) is in sealing cooperation with the valve core (12), the other end is in a separated state with the lock buckle pressure relief assembly (2a), or one end of the valve seat (11) is in a separated state with the valve core (12), the other end is in sealing cooperation with the lock buckle pressure relief assembly (2a); The valve core (12) and the inner wall of the joint body (10) are provided with a valve core spring (13), and the valve core (12) and the valve seat (11) are provided with a valve sealing ring (121); The control sleeve (30) includes a lock sleeve (31) and a rotating sleeve (32), the lock sleeve (31) is slidably sleeved on the lock buckle pressure relief assembly (2a) to control the lock buckle pressure relief assembly (2a), and the rotating sleeve (32) is rotatably sleeved on the joint body (10) to control the axial movement of the valve seat (11); The joint body (10) is provided with an inclined groove member (14) and an axial guide groove (15), the rotating sleeve (32) is connected with the valve seat (11) through a pin shaft (321), the pin shaft (321) is positioned in the inclined groove (141) of the inclined groove member (14) and the guide groove (15), and when the rotating sleeve (32) rotates, the position of the pin shaft (321) is located in the closed valve end (151) and the open valve end (152) of the guide groove (15) and the flat groove (142) corresponding to the two ends of the inclined groove (141), so that the valve seat (11) and the valve core (12) and the lock buckle pressure relief assembly (2a) are in a closed valve pressure relief or open valve sealing state; The lock buckle pressure relief assembly (2a) includes a lock body (20), a push sleeve (21) and a push spring (22), the push sleeve (21) and the push spring (22) are installed in the lock body (20), and the push spring (22) is arranged between the push sleeve (21) and the valve seat (11).

2. The quick coupling with pressure relief function according to claim 1, characterized in that: The lock body (20) and the push sleeve (21) are provided with a sealing stop ring (23).

3. The quick coupling with pressure relief function according to claim 1, characterized in that: The valve seat (11) and the lock body (20) are in sliding sealing cooperation through a sealing ring (111).

4. The quick coupling with pressure relief function according to claim 1, characterized in that: The valve seat (11) and the push sleeve (21) are in sliding sealing cooperation through a sealing ring (111).

5. The quick coupling with pressure relief function according to claim 2, characterized in that: The valve seat (11) and the sealing stop ring (23) are in sliding sealing cooperation through a sealing ring (111), the sealing stop ring (23) is provided with a sealing groove (100), and the sealing ring (111) is arranged in the sealing groove (100).

6. The quick coupling with pressure relief function according to claim 2, characterized in that: The valve seat (11) and the push sleeve (21) are in sliding sealing cooperation through a sealing ring (111), and the valve seat (11) is provided with a through groove (112) penetrating the pin shaft (321).

7. The quick coupling with pressure relief function according to claim 6, characterized in that: The inclined groove member (14) is arranged on the joint body (10) or the lock body (20), and the guide groove (15) is arranged on the joint body (10) or the lock body (20).

8. The quick coupling with pressure relief function according to any one of claims 1 to 7, characterized in that: The lock sleeve (31) is provided with an axial protrusion (312), and the rotating sleeve (32) is provided with an axial notch (322), and the axial protrusion (312) corresponds to the axial notch (322) to be in a sealing closed state of the valve seat (11) and the valve core (12).

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