CN216952155U - Quick joint capable of releasing pressure - Google Patents

Abstract

The utility model discloses a pressure-releasing quick joint, which comprises a lock catch main body and a lock catch sleeve movably sleeved on the lock catch main body, wherein a first-stage lock catch groove and a second-stage lock catch groove with axial level difference are arranged on the lock catch main body, a lock catch is arranged in the lock catch groove, a first-stage release groove and a second-stage release groove which correspond to the first-stage lock catch groove and the second-stage lock catch groove respectively are arranged on the inner wall of the lock catch sleeve, a lock catch support is arranged between the lock catch main body and the lock catch sleeve, the lock catch is limited by the lock catch sleeve and the lock catch support to be switched between the lock catch groove and the release groove in a locking or releasing state, a reset ring and a reset seat are arranged on the lock catch main body, the lock catch sleeve is connected with the reset ring and the reset seat to be matched on the lock catch main body to rotate or axially move, and an elastic piece for automatic reset is arranged between the reset ring and the lock catch support. The first and second locking grooves correspond to the first and second releasing grooves, so that the daughter is released and pulled out in the process of releasing the daughter, the use is safe, and the connector is suitable for the C-shaped connector with a longer front end face of the daughter groove.

Description

Quick joint capable of releasing pressure

Technical Field

The utility model relates to the technical field of pipeline connection, in particular to a quick joint capable of relieving pressure.

Background

A quick joint is a connecting piece for realizing quick connection and disconnection of pipelines and is mainly used for quick installation of gas or liquid pipelines. When the sub-body is required to be disassembled by the ordinary quick connector for the gas pipeline, the steel balls and the like are separated from the clamping grooves in the moment that the sub-body is loosened by pulling behind the locking sleeve, and the sub-body can be disassembled from the connector. Due to the residual air pressure in the joint, the daughter is easily pushed out quickly at the moment of separating from the lock catches such as the steel balls, and the phenomenon of hurting people is caused. And the coupling among the current prior art, it is through pulling out a certain distance pressure release with the daughter, through the clearance in sleeve and groove, lets one of them steel ball can be jack-up, and the daughter pulling is a bit displaced and is carried out the pressure release, continues to demolish the daughter after the pressure release is accomplished. However, the construction of the prior art pipe joint limits its ability to accommodate only the type of joint in which the outer end slope of the recess of the sub-body is short; the C-shaped joint sub-body is not suitable for the C-shaped joint sub-body with a longer front end face, wherein the groove of the sub-body is inserted into the joint end, which is commonly used at present. In addition, the conventional pipe joint needs manual reset after pressure relief through push-pull or rotation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pressure-relief quick connector, which is characterized in that a lock catch is limited by a lock catch support and used for locking and releasing a sub-body, the sub-body is firstly relieved in the process of releasing the sub-body by combining a first-stage lock catch groove and a second-stage lock catch groove, the use is safe, and the connector can be suitable for a C-shaped connector with a longer front end surface of a sub-body groove by combining the axial step difference of the first-stage lock catch groove and the second-stage lock catch groove.

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the utility model provides a can let out pressure quick-operation joint, establish the hasp sleeve on the hasp main part including hasp main part and activity cover, be equipped with first order hasp groove and second level hasp groove that has the axial level difference in the hasp main part, be equipped with the hasp in the hasp groove, hasp sleeve inner wall is equipped with first order release groove and second level release groove corresponding with first order hasp groove and second level hasp groove respectively, be equipped with the hasp support between hasp main part and hasp sleeve, it is locking or release state switching to inject the hasp between hasp groove and release groove through hasp sleeve and hasp support, be equipped with the ring that resets and the seat that resets in the hasp main part, hasp muffjoint resets the ring and resets and cooperates rotatory or axial motion in the hasp main part, be equipped with the elastic component that is used for automatic re-setting between the ring that resets and hasp support.

By adopting the technical scheme, the lock sleeve is matched with the lock bracket when the lock sleeve is operated through the axial difference between the first-stage lock groove and the second-stage lock groove, the position of the lock between the lock groove and the release groove is limited to be switched, and the sub-body is locked or released. When the second-stage locking groove and the second-stage release groove are aligned, the locking buckle in the second-stage locking groove can be pushed into the second-stage release groove by the body groove in the outward pulling process, at the moment, the locking buckle in the first-stage locking groove still keeps the state of locking the daughter groove, the daughter can axially move outwards for a certain distance, the valve in the joint is loosened when the daughter moves outwards, the valve is closed, and residual air pressure can be discharged from the gap between the daughter and the locking buckle main body. And when the first-stage locking groove and the first-stage release groove are aligned, the sub-body groove pushes the lock catch into the first-stage release groove in the outward pulling process, and the sub-body is released and can be pulled out from the lock catch main body. The axial step difference formed between the first-stage locking groove and the second-stage locking groove can be realized through different arrangement positions and also can be realized through different lengths of the locking grooves. When the lock catch sleeve moves, the second-stage release groove is aligned with the second-stage lock catch groove, and the lock catch sleeve is in a pressure relief state; when the first-stage release groove and the first-stage locking groove are aligned, the locking device is in a release state, and the sub-body can be released and removed by the locking and releasing sub-body; after the daughter is pulled out, the locking sleeve is loosened, and the reset ring and the reset seat reset the locking sleeve to the original position; the elastic piece is used for pushing the lock catch support to move axially, and the lock catch can be pressed into the lock catch groove when the lock catch support moves axially. The locking sleeve is in motion, and the reset ring and the reset seat can limit the motion of the locking sleeve and reset the locking sleeve when the external force of the locking sleeve is removed. Through the cooperation of the reset ring and the reset seat, when the locking sleeve is operated, the locking sleeve realizes synchronous axial motion in the rotary motion, and after the locking sleeve is loosened, the reset ring is pushed to reset through the elastic piece, so that the automatic reset of the locking sleeve is realized, and the use is more convenient.

Furthermore, the reset seat and the reset ring are connected in a matching way through the inclined plane of the reset seat and the inclined plane of the reset ring. The seat that resets is fixed in the hasp main part, and when the ring that resets through hasp sleeve drive down rotary motion, through the inclined plane cooperation, make the ring that resets have axial motion for compress the elastic component, make the elastic component save elasticity and be used for when not having the exogenic action, reset the hasp sleeve.

Further, the first-stage locking groove and the second-stage locking groove are elongated grooves extending axially along the locking body, the axial length of the first-stage locking groove is greater than that of the second-stage locking groove, and the length difference between the first-stage locking groove and the second-stage locking groove extending axially along the locking body is the axial difference. Through the axial level difference that first order hasp groove and second level hasp groove formed, realize dismantling the daughter in-process, the hasp enters into the second level release groove from the lateral wall jack-up of quilt body recess in the second level hasp groove earlier, and the daughter moves outward this moment, and the hasp in the first order hasp groove still keeps the state of locking daughter recess to follow daughter recess and follow first order hasp groove axial and move one section distance outward, this distance is the axial level difference in two hasp grooves promptly. The daughter realizes that the valve is closed when outwards moving, and the residual air pressure in the joint leaks the joint outside from the daughter and the clearance of hasp main part, and at the pressure release in-process, keeps locking through the hasp in the second grade hasp groove, avoids the daughter departure.

Furthermore, the first-stage locking groove and the second-stage locking groove respectively form an included angle with the first-stage release groove and the second-stage release groove, the first-stage release groove is an axial long groove, and the second-stage release groove and the second-stage locking groove are axially spaced by a certain distance.

Furthermore, the first-stage lock catch groove and the second-stage lock catch groove are axially spaced from the first-stage release groove and the second-stage release groove by a certain distance, the second-stage release groove is a section of circumferential flat groove, and an included angle is formed between the second-stage lock catch groove and the second-stage release groove.

Furthermore, the outer wall of the reset seat is provided with a reset seat outer protrusion, and the inner wall surface of the lock catch sleeve is provided with a limiting groove matched with the reset seat outer protrusion. Through spacing groove and the evagination cooperation of seat that resets, realize the action that the hasp sleeve was rotatory earlier and is drawn afterwards, or the hasp sleeve draws earlier and rotates afterwards, keeps the orderly and stable of hasp sleeve operation.

Furthermore, the end face of the lock catch support is provided with a support protrusion, the inner end face of the lock catch sleeve is provided with a notch, and the support protrusion is matched with the notch. When the daughter was inserted, the preceding terminal surface top of daughter recess pushed away the hasp to promote hasp support axial and move inwards, when the daughter recess corresponds with first order hasp groove and second level hasp groove, hasp support axial moves outwards and resets, pushes the hasp into the hasp groove through the support arch, with daughter locking.

Furthermore, the end part of the lock catch main body is provided with a limiting protrusion, the inner wall of the lock catch sleeve is provided with a positioning groove, and the limiting protrusion is matched with the positioning groove. When the locking sleeve rotates to enable the positioning groove to be aligned with the limiting protrusion, the locking sleeve can axially move to reset.

The beneficial effects obtained by the utility model are as follows: through the cooperation of the reset ring, the reset seat, the elastic piece and the lock catch support, the lock catch sleeve can be automatically reset after the lock catch sleeve is loosened. In the pressure relief process, after the sub-body moves outwards for a certain distance and forms a gap with the lock catch main body, the residual air pressure in the joint can be released from the gap, and the pressure relief state of the joint is realized at the moment; the daughter is loosened to the hasp in the shorter second level hasp groove of length this moment, and the hasp in the longer first level hasp groove of length still keeps the locking daughter, follows when the daughter moves outward and moves a section distance outward, so through the cooperation of first level hasp groove, second level hasp groove and first level release groove and second level release groove, be pressure release locking state when the pressure release. And continuously rotating or pushing and pulling the locking sleeve to align the first-stage release groove with the first-stage locking groove, and releasing the sub-body groove by the lock catch to completely disassemble the sub-body.

The utility model adopts the cooperation of the lock catch grooves with different lengths to realize the pressure relief and lock the daughter at the same time, thereby preventing the daughter from flying out and having good safety; after the sub-body is pulled out, the automatic resetting can be realized, and the operation is more convenient. The lock catch groove can be arranged at different axial depth positions on the lock catch main body, so that the axial difference of the two lock catch grooves is realized, and the pressure relief and the release of the sub-body are realized.

Drawings

FIG. 1 is a schematic structural diagram of an appearance of a quick coupling capable of relieving pressure according to the present invention;

FIG. 2 is a schematic cross-sectional view of a quick disconnect coupling of the present invention;

FIG. 3 is a schematic cross-sectional view of a quick release coupling of the present invention inserted into a sub-body;

FIG. 4 is a schematic view of a locking sleeve of the quick release coupling according to the present invention;

FIG. 5 is an exploded view of a quick disconnect of the present invention;

FIG. 6 is a cutaway view of an exploded construction of a quick disconnect of the present invention;

FIG. 7 is a partial sectional view of the depressible quick connector of the present invention with the sub-body inserted;

FIG. 8 is a partial cross-sectional view of a depressible quick connector of the present invention in a depressurized state;

FIG. 9 is a partial cross-sectional view of a locking sleeve reset version of a depressible quick connector of the present invention;

FIG. 10 is a cross-sectional view of a quick release coupling according to the present invention in a pressure release state;

FIG. 11 is a cutaway view of the internal structure of another embodiment of a depressible quick coupling of the present invention;

FIG. 12 is a schematic view of a locking sleeve and a locking bracket of another embodiment of a quick release coupling according to the present invention;

FIG. 13 is a schematic view of a valve core of another embodiment of the quick disconnect coupling of the present invention;

FIG. 14 is a sectional view showing the inner structure of a further embodiment of a pressure relief quick coupling according to the present invention;

FIG. 15 is a schematic cross-sectional view of a quick connector with pressure relief according to another embodiment of the present invention;

FIG. 16 is a schematic sectional view illustrating the construction of a sub-body of another embodiment of a quick disconnect according to the present invention when pulled out;

FIG. 17 is a schematic view showing a locked state of the sub-body inserted into the locker body according to still another embodiment of the quick coupling for compression release of the present invention;

FIG. 18 is a schematic view of a locking body and a locking sleeve of another embodiment of the quick release coupling of the present invention.

Description of reference numerals: 10 lock catch main body, 11 joint main body, 12 lock catch sleeve, 13 valve core, 14 valve core sealing element, 15 valve core spring, 16 sealing retaining ring, 17 sub-body sealing ring, 18 lock catch, 19 lock catch bracket, 20 reset ring, 21 reset seat, 22 elastic element, 101 first-stage lock catch groove, 102 second-stage lock catch groove, 103 outer groove, 107 limit projection, 121 first-stage release groove, 122 second-stage release groove, 123 limit groove, 124 straight groove, 125 notch, 126 inner concave inclined plane, 127 positioning groove, 191 push block, 192 convex block, 193 bracket projection, 194 convex inclined plane, 201 reset ring inclined plane, 202 reset ring outer convex, 211 reset seat inclined plane, 212 reset seat outer convex, 213 reset seat inner convex, 30 sub-body, 301 sub-body groove.

Detailed Description

The utility model is further described with reference to the following figures and detailed description.

Referring to fig. 1 to 18, a quick coupling capable of releasing pressure comprises a locking main body 10 and a locking sleeve 12 movably sleeved on the locking main body 10, wherein a first locking groove 101 and a second locking groove 102 having axial level difference are arranged on the locking main body 10, a locking device 18 is arranged in the locking groove, a first releasing groove 121 and a second releasing groove 122 corresponding to the first locking groove 101 and the second locking groove 102 respectively are arranged on the inner wall of the locking sleeve 12, the locking device is characterized in that a locking support 19 is arranged between the locking main body 10 and the locking sleeve 12, the locking 18 is limited by the locking sleeve 12 and the locking support 19 to be locked or released and switched between a locking groove and a releasing groove, a reset ring 20 and a reset seat 21 are arranged on the locking main body 10, the locking sleeve 12 is connected with the reset ring 20 and the reset seat 21 and matched with the locking main body 10 to rotate or axially move, and an elastic element 22 for automatic reset is arranged between the reset ring 20 and the locking support 19.

In the present embodiment, the reset seat 21 and the reset ring 20 are connected by the reset seat inclined plane 211 and the reset ring inclined plane 201.

The first-stage locking groove 101 and the second-stage locking groove 102 are elongated grooves extending in the axial direction of the lock body 10.

The axial length of the second-stage locking groove 102 is greater than that of the first-stage locking groove 101, and the axial difference between the lengths of the second-stage locking groove 102 and the first-stage locking groove 101 extending in the axial direction of the lock body 10 is the axial difference.

The axial difference between the first-stage locking groove 101 and the second-stage locking groove 102 is the displacement difference between the first-stage locking groove 101 and the second-stage locking groove 102 in the axial direction when the two locking grooves are disposed on the locking body 10. Wherein the displacement difference can be realized by different arrangement positions of the locking groove and different lengths of the locking groove. In the present embodiment, the length of the first-stage locking groove 101 is greater than the length of the second-stage locking groove 102.

The first-stage locking groove 101 and the second-stage locking groove 102 are elongated grooves extending axially along the locking body 10, the axial length of the first-stage locking groove 101 is greater than that of the second-stage locking groove 102, and the length difference between the first-stage locking groove 101 and the second-stage locking groove 102 extending axially along the locking body 10 is the axial step difference.

In other embodiments, the first and second latch grooves 101, 102 are axially spaced from the first and second relief grooves 121, 122, respectively, the second relief groove 122 is a circumferential flat groove, and the second latch grooves 102, 122 are angularly spaced.

The outer wall of the reset seat 21 is provided with a reset seat outer protrusion 212, and the inner wall of the locking sleeve 12 is provided with a limit groove 123 matched with the reset seat outer protrusion 212. The latch sleeve 12 drives the reset ring 20 to move, the reset ring 20 can axially move along the latch main body 10 through the cooperation of the reset ring 20 and the inclined plane structure of the reset seat 21, the elastic part 22 is compressed in the movement of the reset ring, when the latch sleeve 12 is loosened, the elastic part 22 provides an elastic force effect to push the reset ring 20 to axially reset, and in the axial movement process of the reset ring 20, through the cooperation with the reset seat 21, the reset ring simultaneously rotates to drive the latch sleeve 12 to rotationally reset. The outer wall of hasp main part 10 is equipped with outer groove 103, and the inner wall of seat 21 resets is equipped with the seat that resets and inwards projects 213, and the seat that should reset is inwards projected 213 and is fixed a position in outer groove 103 for when the reset ring 20 is rotatory, the position that keeps seat 21 resets is motionless, in order through the cooperation of seat inclined plane 211 and the inclined plane 201 of reset ring, makes reset ring 20 carry out axial motion. The outer wall of the reset seat 21 is provided with a reset seat convex 212, and the inner wall surface of the locking sleeve 12 is provided with a limit groove 123 matched with the reset seat convex 212. The limiting groove 123 is composed of an axial groove and a circumferential groove, wherein when the reset seat outer protrusion 212 is located in the circumferential groove of the limiting groove 123, the rotation motion of the locking sleeve 12 is limited, and when the reset seat outer protrusion 212 is located in the axial groove of the limiting groove 123, the axial push-pull motion of the locking sleeve 12 is limited. The outer periphery of the reset ring 20 is provided with a reset ring protrusion 202, the inner wall of the locking sleeve 12 is provided with a straight groove 124, and the reset ring protrusion 202 extends into the straight groove 124. The reset ring projection 202 is carried along by the straight groove 124 such that the reset ring 20 follows the locking sleeve 12 in rotation, the reset ring projection 202 of which is positioned in the straight groove 124 during axial movement of the reset ring 20.

The end surface of the locking bracket 19 is provided with a bracket projection 193, the inner end surface of the locking sleeve 12 is provided with a notch 125, and the bracket projection 193 is matched with the notch 125.

The end of the locking main body 10 is provided with a limiting protrusion 107, the inner wall of the locking sleeve 12 is provided with a positioning groove 127, and the limiting protrusion 107 is matched with the positioning groove 127.

The end surface of the locking bracket 19 is provided with a convex inclined surface 194, the inner side surface of the locking sleeve 12 is provided with an inner concave inclined surface 126, and the convex inclined surface 194 is matched with the inner concave inclined surface 126. When the sub-body groove 301 is aligned with the catch groove, the projection ramp 194 of the catch bracket 19 pushes the catch 18 into the catch groove to lock the sub-body 30.

The lock catch support 19 is provided with push blocks 191 and protruding blocks 192 which are arranged at intervals, the protruding blocks 192 are abutted against the elastic piece 22, and the push blocks 191 correspond to the first-stage lock catch grooves 101 and the second-stage lock catch grooves 102. When the sub-body 30 is inserted, the catch holder 19 is displaced, the projections 192 thereof compress the spring 22, and the pushers 191 correspond to the first-stage catch grooves 101 and the second-stage catch grooves 102 for retaining the catch 18 in the catch grooves when the catch holder 19 is moved back outward.

The lock catch main body 10 is connected with a joint main body 11, a valve core 13, a valve core spring 15 and a sealing stop ring 16 are arranged in the joint main body 11, the valve core 13 and the sealing stop ring 16 are sealed through a valve core sealing piece 14, and the valve core spring 15 is arranged between the valve core 13 and the inner end face of the joint main body 11. The sub-body 30 is inserted into the latch main body 10, the end part of the sub-body pushes the valve core 13, the valve core 13 compresses the valve core spring 15, at the moment, the valve core 13 is separated from the sealing stop ring 16, and the valve is opened; when the sub-body 30 is pulled out, the valve element 13 is pushed toward the seal retainer ring 16 by the elastic force of the valve element spring 15 and the fluid pressure, and is sealed by the valve element seal 14, thereby closing the valve. When the valve is closed, the sub-body 30 is separated from the valve core 13, and the residual air pressure in the joint is discharged from the gap between the sub-body 30 and the latch main body 10.

As shown in fig. 1 to 8, the sub-body 30 is inserted into the locking device body 10, the locking device 18 is pushed to move inward by a certain distance by the front slope of the sub-body groove 301, the locking device 18 pushes the locking device support 19, the locking device support 19 pushes the elastic member 22, when the sub-body groove 301 is aligned with the locking device groove, the locking device 18 stops being pushed, the locking device support 19 is pushed to move outward by the elastic force of the elastic member 22, and at this time, the locking device 18 is pushed into the first-stage locking groove 101 and the second-stage locking groove 102 by the pushing block 191 and is locked in the sub-body groove 301. The inner end part of the sub-body 30 pushes the valve core 13, the valve core 13 moves inwards in the axial direction to compress the valve core spring 15, and the valve core 13 is separated from the sealing stop ring 16, so that the valve is opened. When the sub-body 30 is inserted into the locker main body 10, the outer wall thereof is sealed with the locker main body 10 by the sub-body packing 17.

When the sub-body 30 is pulled out, the locking sleeve 12 is rotated to align the second-stage release groove 122 with the second-stage locking groove 102, and when the sub-body is pulled, the sub-body groove 301 pushes the locking buckle 18 to enter the gap between the second-stage release groove 122 and the second-stage locking groove 102, at this time, the sub-body 30 moves outwards in the axial direction by a certain distance, the locking buckle 18 in the first-stage locking groove 101 moves outwards by the same distance in the first-stage locking groove 101, and the locking of the sub-body groove 301 is maintained. After the sub-body 30 moves outwards for a certain distance, the sub-body 30 is separated from the valve core 13, the valve core 13 is pushed by the fluid pressure and the elastic force of the valve core spring 15, and the valve core sealing piece 14 and the sealing stop ring 16 are combined to be extruded and sealed, so that the valve is closed. The residual air pressure in the connector can be released from the gap between the sub-body 30 and the locking main body 10, and when the residual pressure in the connector is released, the locking sleeve 12 is pushed and pulled to align the first stage release groove 121 with the first stage locking groove 101, and the sub-body is pulled out continuously to jack up the locking device 18, so that the locking device 18 releases the sub-body groove 301 to detach the sub-body from the connector.

When the locking sleeve 12 rotates and the notch 125 formed on the inner end surface of the locking sleeve is aligned with the bracket projection 193, the elastic member 22 can push the locking bracket 19 to make the bracket projection 193 match with the notch 125, and at this time, the locking sleeve 12 can drive the locking bracket 19 to rotate, so that the pushing block 191 of the locking bracket 19 rotates away from the first-stage locking groove 101 and the second-stage locking groove 102, and the locking 18 is stopped being limited. At this time, the decompression and detachment operation can be performed by pulling the sub-body 30.

As shown in fig. 1 to 6 and fig. 9 and 10, the locking sleeve 12 is rotated to align the second-stage release groove 122 with the second-stage locking groove 102, when the sub-body is pulled, the sub-body groove 301 pushes the locking buckle 18 to enter the gap between the second-stage release groove 122 and the second-stage locking groove 102, at this time, the sub-body 30 moves outward in the axial direction by a distance, and the locking buckle 19 in the first-stage locking groove 101 keeps locking the sub-body groove 301 and follows the first-stage locking groove 101 by the same distance. After the sub-body 30 is separated from the valve core 13, the valve is closed, and the residual air pressure in the joint is discharged from the gap between the sub-body 30 and the latch main body 10. The sub-body 30 is released by pulling back the locking sleeve 12 so that the first release groove 121 is aligned with the first locking groove 101 and the sub-body 30 is pulled out, the locking tab 18 entering the gap between the first release groove 121 and the first locking groove 101, and the sub-body 30 can be pulled out of the joint.

As shown in fig. 11, 12 and 13, the present embodiment is characterized in that the inner end surface of the locking sleeve 12 is provided with an inner concave inclined surface 126, the end surface of the locking bracket 19 is provided with a convex inclined surface 194, and when the locking bracket 19 pushes the locking device 18 into the locking groove by the urging of the elastic member 22, the convex inclined surface 194 abuts against and engages with the inner concave inclined surface 126.

Referring to fig. 14-15, the shackle 18 in the first stage shackle slot 101 retains the lock sub-body 30 from flying out by pulling the shackle sleeve 12 back so that the second stage release slot 122 is first aligned with the second stage shackle slot 102 and the sub-body 30 is released after moving outward a distance. After the pressure relief is completed, the latch sleeve 12 is rotated on the latch body 10 such that the first stage relief groove 121 is aligned with the first stage latch groove 101, and the latch 18 releases the sub-body 30, allowing the sub-body 30 to be removed from the latch body 10.

Referring to fig. 16 to 18, the locking sleeve 12 is pulled backward, and when the second stage release groove 122 is aligned with the second stage locking groove 102, the pressure releasing operation is performed, and after the pressure releasing operation is completed, the locking sleeve 12 is rotated to align the first stage release groove 121 with the first stage locking groove 101, so that the sub-body 30 is released and pulled out. When the locking device needs to be reset, the locking sleeve 12 is rotated, so that the positioning groove 127 formed in the inner wall of the locking sleeve 12 is aligned and matched with the limiting protrusion 107 on the locking main body 10, and the locking sleeve 12 can move forward and reset.

In summary, the actual samples of the present invention are prepared according to the description and the drawings, and after a plurality of usage tests, the effect of the usage tests proves that the present invention can achieve the expected purpose, and the practical value is undoubted. The above-mentioned embodiments are only for convenience of illustration and not intended to limit the utility model in any way, and those skilled in the art will be able to make equivalents of the features of the utility model without departing from the technical scope of the utility model.

Claims (8)

1. The utility model provides a can let out pressure quick-operation joint which characterized in that: the locking device comprises a locking main body (10) and a locking sleeve (12) movably sleeved on the locking main body (10), wherein a first-stage locking groove (101) and a second-stage locking groove (102) with axial level difference are arranged on the locking main body (10), a lock catch (18) is arranged in the locking groove, a first-stage release groove (121) and a second-stage release groove (122) which correspond to the first-stage locking groove (101) and the second-stage locking groove (102) respectively are arranged on the inner wall of the locking sleeve (12), a locking bracket (19) is arranged between the locking main body (10) and the locking sleeve (12), the locking sleeve (18) is limited by the locking sleeve (12) and the locking bracket (19) to be in locking or releasing state switching between the locking groove and the release groove, a reset ring (20) and a reset seat (21) are arranged on the locking main body (10), the locking sleeve (12) is connected with the reset ring (20) and the reset seat (21) to be matched on the locking main body (10) to rotate or move axially, an elastic piece (22) for automatic reset is arranged between the reset ring (20) and the lock catch bracket (19).

2. The depressible quick coupling of claim 1, wherein: the reset seat (21) is connected with the reset ring (20) in a matching way through a reset seat inclined plane (211) and a reset ring inclined plane (201).

3. The depressible quick coupling of claim 1, wherein: the lock catch comprises a lock catch body (10), and is characterized in that a first-stage lock catch groove (101) and a second-stage lock catch groove (102) are elongated grooves which extend axially along the lock catch body (10), the axial length of the first-stage lock catch groove (101) is larger than that of the second-stage lock catch groove (102), and the axial difference of the lengths of the first-stage lock catch groove (101) and the second-stage lock catch groove (102) extending axially along the lock catch body (10) is the axial difference.

4. The depressible quick coupling of claim 1, wherein: the first-stage locking groove (101) and the second-stage locking groove (102) respectively form an included angle with the first-stage releasing groove (121) and the second-stage releasing groove (122) at intervals, the first-stage releasing groove (121) is an axial long groove, and the second-stage releasing groove (122) and the second-stage locking groove (102) are axially spaced at intervals.

5. The depressible quick coupling of claim 1, wherein: the first-stage locking groove (101) and the second-stage locking groove (102) are axially spaced from the first-stage release groove (121) and the second-stage release groove (122) at intervals, the second-stage release groove (122) is a circumferential flat groove, and the second-stage locking groove (102) and the second-stage release groove (122) are spaced at an included angle.

6. The depressible quick coupling of claim 1, wherein: the outer wall of the reset seat (21) is provided with a reset seat convex (212), and the inner wall surface of the lock catch sleeve (12) is provided with a limiting groove (123) matched with the reset seat convex (212).

7. The depressible quick coupling of claim 1, wherein: the end face of the lock catch support (19) is provided with a support protrusion (193), the inner end face of the lock catch sleeve (12) is provided with a notch (125), and the support protrusion (193) is matched with the notch (125).

8. The depressible quick coupling of claim 1, wherein: the end part of the lock catch main body (10) is provided with a limiting protrusion (107), the inner wall of the lock catch sleeve (12) is provided with a positioning groove (127), and the limiting protrusion (107) is matched with the positioning groove (127).

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