CN217463651U - Quick-release joint - Google Patents

Abstract

The utility model provides a quick detach connects, include: the valve seat is provided with a movable buckling ring and steel balls which are circumferentially distributed on the valve seat at equal intervals; a valve core assembly is axially and slidably arranged in a valve cavity of the valve seat; the conducting interface is connected with a valve sleeve, and a valve rod of the valve core assembly is axially and slidably arranged in a through cavity of the valve sleeve; the valve core assembly is provided with a conducting channel corresponding to the external male plug, and the guide groove of the movable buckling ring pushes the steel balls to abut against the limiting valve cover of the valve core assembly in the circumferential direction. The utility model has stable and reliable integral structure and convenient use, and can realize the plugging and installation of the joint by one hand; the branch interface of body is provided with fast-assembling coupling, need not to realize the quick installation of coupling hose with the help of the instrument.

Description

Quick-release joint

Technical Field

The utility model relates to a quick-operation joint technical field specifically discloses a quick detach connects.

Background

The quick connector is a connector which can realize the connection or disconnection of pipelines without tools, and is usually used for gas communication connection. The pneumatic quick connector is used as an example, the pipeline can be communicated or disconnected without tools, and the pneumatic quick connector is suitable for connecting an air pressure pipeline, compressed air and nitrogen, and the pipeline can be frequently assembled and disassembled at a working position, such as the operation of a pneumatic tool on an assembly line. Some quick connectors on the market at present have the same or different structures, when a male plug connector is inserted into a parent body, the locking connection between a tolerance connector and the parent body is realized through steel ball locking, and when the male plug connector is disassembled, a movable buckle ring is axially moved to realize quick unlocking; some existing pneumatic quick connectors, such as some three-way connectors, cannot realize automatic air closing (i.e. the interface is in a normally open and conductive state); in addition, the traditional joint connection mostly needs to be operated by two hands, the movable buckle ring is slid while the external male plug connector is inserted, the operation by one hand cannot be carried out, and the use is not convenient.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a simple reliable quick detach connects of overall structure, can carry out one-hand operation, it is convenient to use.

(II) technical scheme

In order to solve the technical problem, the utility model provides a quick-release joint which is applicable to some common two-way joints, three-way joints and other joints; the method specifically comprises the following steps: the valve core component comprises a body, wherein a valve seat is detachably mounted at a conducting interface of the body, and a valve core component is axially and slidably mounted in a valve cavity of the valve seat; the valve seat is provided with a locking structure, the locking structure comprises a movable buckling ring axially and slidably mounted on the valve seat and steel balls circumferentially distributed on the valve seat at equal intervals, and the movable buckling ring is used for locking the male plug connector on the valve seat; when the external male plug connector is not plugged and conducted (namely the quick-release connector is not connected with the external male plug connector), the movable buckling ring pushes the steel balls to abut against a limiting valve cover of the valve core assembly in the circumferential direction; the valve core assembly is characterized in that the conduction interface is connected with a valve sleeve, a valve rod of the valve core assembly is axially and slidably arranged in a through cavity of the valve sleeve, and the through cavity is communicated with the conduction interface; the valve core assembly is provided with a conducting channel corresponding to the external male plug; when the external male plug connector is plugged and switched on (namely, the external male plug connector is installed on the quick-release connector), one end of the male plug connector is inserted into the switching-on channel, the limit valve cover and the valve rod of the valve core assembly are pressed downwards, the switching-on channel is connected and switched on with the switching-on interface, and the movable fastening ring pushes the steel ball to be locked with the male plug connector. The outer diameter of the connecting section of the external male plug connector is less than or equal to the outer diameter of the limiting valve cover; in the connection process, only the male plug connector is directly inserted into the conduction channel of the valve core assembly, in the pressing process, the limiting valve cover is separated from the steel ball, the steel ball abutting against the outer circumference of the limiting valve cover is guided into the annular clamping groove of the male plug connector, and the male plug connector is connected with the valve seat and the steel ball in a locking mode.

Furthermore, the locking structure further comprises a second reset elastic piece, and the second reset elastic piece is arranged between the movable buckle ring and the valve seat; an annular clamping groove matched with the steel ball is formed in the outer circumferential surface of the male plug-in connector; the second reset elastic piece is used for providing a pushing force far away from the body for the movable buckle ring all the time; when the male plug connector is not plugged and conducted, the second reset elastic piece pushes the movable buckling ring to enable the steel ball to be abutted against the limiting valve cover in the circumferential direction; when the male plug connector is plugged and conducted, the second reset elastic piece pushes the movable buckling ring to enable the steel balls to be locked on the annular clamping groove of the male plug connector; the movable buckle ring is not required to be firstly slid, and the movable buckle ring can be directly inserted into an external male plug connector.

A first reset elastic piece is arranged between the valve core assembly and the valve sleeve; the first reset elastic piece is sleeved on the valve rod; the valve rod is provided with a plurality of radially distributed conduction grooves which are communicated with the conduction channels; the conducting groove of the valve rod is circumferentially sealed in the through cavity, and the function of an air-tight valve is realized when the external male plug connector is not conducted; when the valve rod is communicated, the external male plug connector is inserted into the communication channel to push the valve rod to slide downwards, and the communication groove is separated from the communication cavity downwards and communicated with the communication interface.

The utility model discloses when public bayonet joint did not peg graft and switch on, the conduction groove of its case subassembly is that circumference is sealed and is in run through the chamber, the medium can not warp the conduction groove with switch on the interface intercommunication. When the male plug is inserted into the conduction channel of the valve core assembly, the conduction groove is not directly conducted with the conduction interface; and only after the male plug connector is continuously inserted and the valve rod of the male plug connector is pressed down, the conducting groove is axially separated from the through cavity and then is communicated with the conducting interface, and at the moment, the male plug connector is communicated with the body, so that the leakage-proof effect is good.

Furthermore, when the male plug connector is not plugged and conducted, the upper end of the limiting valve cover of the valve core assembly is limited and abutted against the bottom of the valve cavity, so that the axial limiting effect is realized, and the valve core assembly is prevented from being separated out of the valve cavity; the valve core assembly further comprises a sealing gasket mounted in the valve rod. And when the male plug connector is not plugged and conducted, the limiting valve cover is abutted against the bottom of the valve cavity to limit the axial direction of the valve core assembly.

Furthermore, the limit valve cover is buckled on the valve rod; the valve rod, the sealing gasket and the limiting valve cover form the conducting channel; the lower end of the limiting valve cover is used for limiting the sealing gasket to abut against the inside of the valve rod, the male plug connector abuts against the sealing gasket when being plugged and conducted, and the conduction groove is conducted with the conduction interface through pressing the sealing gasket and the valve rod.

Furthermore, a first sealing ring and a second sealing ring are correspondingly sleeved on the two sides of the conduction groove of the valve rod; when the male plug connector is not plugged and conducted, the conducting groove is isolated from the conducting interface through the first sealing ring.

Further, a third sealing ring is further arranged on the valve rod. The third sealing ring is used for being matched with the second sealing ring to play a further sealing role when the male plug connector is plugged and conducted, so that gas is prevented from leaking.

Furthermore, the valve seat is installed at the conduction interface through threaded connection, and the valve sleeve is detachably installed on the conduction interface.

Furthermore, a limiting piece is buckled on the valve seat to prevent the movable buckling ring from being separated from the valve seat; when the external male plug connector is plugged and conducted, the inner side end of the movable buckle ring abuts against the limiting part.

Furthermore, a quick-mounting pipe joint is arranged at the branch joint of the body.

(III) advantageous effects

The utility model discloses quick detach connects overall structure is simple reliable, and the guiding groove of activity knot circle promotes the steel ball circumference and leans on the spacing bonnet of case subassembly, need not additionally to stimulate the activity knot circle can be with external public spigot directly insert to the disk seat in, and the activity knot circle promotes the steel ball block in external public spigot's ring groove in the process of inserting, can realize one-hand operation; the valve rod of the valve core component is circumferentially provided with a conduction groove which is sealed in the through cavity of the valve sleeve, the function of the air-closing valve is realized when the valve is not inserted and conducted, and the whole anti-leakage effect is good; in addition, the branch connectors at the two ends of the body are provided with the quick pipe connectors, the hoses can be installed at the branch connectors through the quick pipe connectors without tools, the quick installation of the connecting hoses is realized, and the problem that the conventional branch connectors on the market are inconvenient to use due to the fact that adapters are additionally installed for connection is solved.

Drawings

Fig. 1 is a perspective view of a first embodiment of the present invention;

FIG. 2 is a perspective view of the embodiment of the present invention after being cut in half;

fig. 3 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 4 is an enlarged view of I in FIG. 3;

FIG. 5 is a cross-sectional view A-A of FIG. 3;

fig. 6 is an exploded view of a valve cartridge assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural view of the valve element assembly according to the embodiment of the present invention when it is not in conduction;

fig. 8 is a schematic structural view of the valve element assembly according to the embodiment of the present invention when the valve element assembly is turned on;

fig. 9 is an exploded view of a body and valve housing according to an embodiment of the present invention;

fig. 10 is a perspective view of a male plug according to an embodiment of the present invention after being plugged;

fig. 11 is a schematic structural view of a male plug according to an embodiment of the present invention after being plugged;

FIG. 12 is an enlarged view of II of FIG. 11;

FIG. 13 is a cross-sectional view taken along line B-B of FIG. 11;

fig. 14 is a schematic structural view of a valve seat according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a second embodiment of the present invention;

fig. 16 is a schematic structural diagram of a third embodiment of the present invention;

fig. 17 is a schematic structural diagram of a fourth embodiment of the present invention;

wherein: the valve comprises a body 1, a conduction interface 2, a valve seat 3, a valve cavity 4, a valve core assembly 5, a valve sleeve 6, a valve rod 7, a through cavity 8, a male plug connector 9, a conduction channel 10, a conduction groove 11, a first reset elastic element 12, a sealing gasket 13, a limit valve cover 14, a first sealing ring 15, a second sealing ring 16, a third sealing ring 17, a movable buckling ring 18, a steel ball 19, a second reset elastic element 20, a limiting element 21, a guide groove 22, an annular clamping groove 23, a guide groove 24, a thread groove 25, a quick-assembly pipe connector 26, a movable element 27 and a quick-assembly elastic sheet 28.

Detailed Description

The first embodiment is as follows:

referring to fig. 1-14, the utility model provides a quick detach connects, in this embodiment, quick detach connects for three way connection, specifically includes: a body 1, wherein the body 1 of the embodiment is a three-way joint body; a valve seat 3 is detachably mounted at the conducting interface 2 of the body 1, and a valve core assembly 5 is axially and slidably mounted in a valve cavity 4 of the valve seat 3; the conduction interface 2 is connected with a valve sleeve 6; a valve rod 7 of the valve core component 5 is axially and slidably arranged in a through cavity 8 of the valve sleeve 6, and the through cavity 8 is communicated with the communication interface 2; the valve sleeve 6 is installed on the valve rod 7 of the valve core assembly 5 in advance in the embodiment, and then is integrally installed at the conducting interface 2; the valve core component 5 is provided with a conduction channel 10 corresponding to the external male plug 9 and a plurality of conduction grooves 11 radially arranged on the valve rod 7, and the conduction grooves 11 are communicated with the conduction channel 10; a first reset elastic piece 12 is arranged between the valve core component 5 and the valve sleeve 6; the first elastic resetting piece 12 is sleeved on the valve rod 7; the passage groove 11 of the valve rod 7 is sealed circumferentially in the through-chamber 8. The inner diameter of the through cavity 8 is smaller than the inner diameter at the conducting interface 2.

Referring to fig. 3, 4 and 12, the valve seat 3 is provided with a locking structure, the locking structure includes a movable fastening ring 18 axially slidably mounted on the valve seat 3 and steel balls 19 circumferentially distributed on the valve seat 3 at equal intervals, and the movable fastening ring 18 is used for locking the male plug 9 on the valve seat 3; compared with the prior art, when the male plug 9 is not plugged and conducted, the guide groove 22 of the movable snap ring 18 pushes the steel ball 19 to abut against the limit valve cover 14 of the valve core assembly 5 in the circumferential direction, so that the male plug 9 is plugged and matched with one hand, and meanwhile, a certain limit effect can be achieved on the limit valve cover. When the quick-release connector is switched on, one end of the external male plug-in connector 9 is plugged into the conduction channel 10, the valve rod 7 is pushed to slide downwards, the conduction groove 11 is separated downwards from the through cavity 8 and is conducted with the conduction interface 2, and the guide groove 22 of the movable fastening ring 18 pushes the steel ball 19 to be clamped into the annular clamping groove 23 of the male plug-in connector in the pressing-down process, so that the valve seat 3 is locked and connected with the male plug-in connector 9; the locking connection between the steel balls 19 and the male plug 9 can be realized without pulling the movable buckle ring 18 axially and inserting the male plug at the same time like the traditional quick connector. In this embodiment, when the male plug 9 is not plugged and conducted, the conducting groove 11 of the valve core assembly 5 is circumferentially sealed in the through cavity 8, and the medium (generally, a gas medium, or a liquid medium, in this embodiment, a gas) is not communicated with the conducting interface 2 through the conducting groove 11. When the external male plug connector just begins to be inserted, the external male plug connector can not be directly conducted, and only the valve rod is pressed down through the male plug connector, so that the conducting groove in the valve rod is separated from the conducting interface conducting connection with the body after the conducting groove is separated from the through cavity.

The outer diameter of the connecting section of the male plug-in connector 9 is smaller than or equal to the outer diameter of the limiting valve cover 14, so that the movable snap ring 18 can guide the steel balls 19 to enter the annular clamping groove 23 of the male plug-in connector 9 conveniently; referring to fig. 11, in the present embodiment, the outer diameter of the connection section of the male plug 9 is smaller than the outer diameter of the limit valve cover 14; in the process of connecting the male plug 9, only the male plug 9 needs to be directly inserted into the conducting channel 10 of the valve core assembly 5, and in the process of pressing down, the steel balls 19 abutting against the outer circumference of the limiting valve cover 14 are guided into the annular clamping groove 23 of the male plug 9, so that the locking connection between the male plug 9 and the valve seat 3 is realized. The male plug connector 9 can be directly inserted without sliding the movable buckle ring 18 first, and the operation can be carried out by one hand during plug-in connection.

Fig. 3 and 7 show the quick release connector in a state where the external male luer connector 9 is not mounted, and fig. 8 and 11 show the external male luer connector 9 after it is plugged into the quick release connector.

Referring to fig. 5 and 13, the steel ball 19 is mounted in a steel ball groove of the valve seat 3. Referring to fig. 5, when the male plug 9 is not plugged and conducted, the movable snap ring 18 pushes the steel ball 19 to abut against the limit valve cover 14 in the circumferential direction; referring to fig. 13, when the male plug 9 is plugged and conducted, the movable snap ring 18 clamps the steel ball 19 on the annular groove 23 of the male plug 9, so as to lock and position the valve seat 3 and the male plug 9.

Referring to fig. 3 and 11, the locking structure further includes a second elastic restoring member 20, the second elastic restoring member 20 is disposed between the movable fastening ring 18 and the valve seat 3, and the second elastic restoring member 20 is sleeved on the valve seat 3; a guide groove 22 is arranged in the movable buckle ring 18, and an annular clamping groove 23 matched with the steel ball 19 is arranged on the outer circumferential surface of the male plug-in connector 9; the second reset elastic element 20 is used for always providing a pushing force far away from the body 1 for the movable buckle ring 18; when the male plug-in connector 9 is plugged and conducted, the movable buckle ring 18 is pushed to lock the steel balls 19 on the annular clamping groove 23 of the male plug-in connector 9; when the male plug connector 9 is not plugged and conducted, the movable fastening ring 18 is pushed to enable the steel balls 19 to abut against the limiting valve cover 14 in the circumferential direction. When the male plug-in connector 9 is disassembled and unlocked, the movable fastening ring 18 is slid downwards by hand, so that the steel balls 19 can be separated from the annular clamping groove 23 of the male plug-in connector 9, and in the process of disassembling the male plug-in connector 9, the first reset elastic piece 12 integrally pushes the valve core assembly 5, so that the sealing gasket 13 and the male plug-in connector 9 can synchronously move until the conduction groove 11 falls into the through cavity 8, and the conduction groove is not conducted with the conduction interface 2; can achieve certain leakage-proof effect in the disassembly process.

Referring to fig. 3 and 4, the upper end of the valve core assembly 5 is limited and abutted against the bottom of the valve cavity 4 when the male plug 9 is not plugged and conducted, so as to play a role of axial limitation and prevent the valve core assembly 5 from being separated from the valve cavity 4; the cartridge assembly 5 further includes a gasket 13 mounted within the valve stem 7 and a limit bonnet 14 attached to the valve stem 7. When the male plug connector 9 is not plugged and conducted, the limiting valve cover 14 abuts against the bottom of the valve cavity 4 to limit the axial direction of the valve core assembly 5.

In the embodiment, the limit valve cover 14 is buckled on the valve rod 7; the valve rod 7, the sealing gasket 13 and the limiting valve cover 14 form a conducting channel 10; the lower end of the limit valve cover 14 limits the sealing gasket 13 to be abutted against the valve rod 7, the male plug connector 9 is abutted against the sealing gasket 13 when being plugged and conducted, and the conduction groove 11 is conducted with the inner cavity of the conduction interface 2 through pressing the sealing gasket 13 and the valve rod 7.

When the male plug 9 is inserted into the conduction channel 10 of the valve core assembly 5, the conduction groove 11 is not directly conducted with the conduction interface 2; only the male plug-in connector 9 is continuously inserted, the valve rod 7 of the male plug-in connector 9 is pressed downwards, so that the conduction groove 11 is axially separated from the through cavity 8 and then is communicated with the conduction interface 2, the male plug-in connector 9 is communicated with the body 1, the male plug-in connector 9 is always sealed and abutted on the sealing gasket 13 when being inserted into the conduction channel 10, and the whole anti-leakage effect is good.

Referring to fig. 3, 7 and 8, the valve rod 7 is sleeved with a first sealing ring 15 and a second sealing ring 16 on two sides of the conduction groove 11; when the male plug connector 9 is not plugged and conducted, the first sealing ring 15 seals the through cavity 8, so that the conducting groove 11 is isolated from the conducting interface 2, and in this embodiment, the second sealing ring 16 enters the through cavity 8.

Referring to fig. 7 and 8, the valve stem 7 is further provided with a third sealing ring 17. The third sealing ring 17 is used for being matched with the second sealing ring 16 to play a further sealing role when the male plug connector 9 is plugged and conducted, so that gas is prevented from leaking. Referring to fig. 7, in the present embodiment, the specifications of the first sealing ring 15, the second sealing ring 16 and the third sealing ring 17 are the same, and the groove depth of the installation groove of the valve rod 7 for installing the first sealing ring 15 is shallower, so that the maximum outer diameter of the first sealing ring 15 after being sleeved on the valve rod 7 is larger; the valve sleeve 6 is installed on the valve rod 7 of the valve core assembly 5 in advance, the valve rod 7 is installed in the through cavity 8 of the valve sleeve 6 in a limiting mode through installing the first sealing ring 15 (namely, the valve sleeve 6 and the valve core assembly 5 form a whole and are installed on the conduction interface 2), and when the external male plug connector 9 is not plugged and conducted, the first sealing ring 15 abuts against the end portion of the valve sleeve 6 to play a sealing role.

Fig. 8 and 11 show that when the male plug 9 is plugged and conducted, the second sealing ring 16 and the third sealing ring 17 are located in the through cavity 8, so as to prevent the medium (gas or liquid, etc.) in the conducting interface 2 from leaking out through the gap between the through cavity 8 and the valve rod 7.

Referring to fig. 9, the valve seat 3 is installed on the external thread section of the conducting port 2 through a threaded connection, and the valve housing 6 is detachably installed on the conducting port 2; referring to fig. 7 and 8, the communication channel 10, the through cavity 8 and the communication interface 2 are coaxially arranged.

Referring to fig. 4 and 12, the valve seat 3 is buckled with a stopper 21 to prevent the movable buckle ring 18 from being separated from the valve seat 3; when the external male plug connector 9 is plugged and conducted, the inner end of the movable buckle ring 18 abuts against the limiting part 21.

Referring to fig. 14, the valve seat 3 of the present embodiment includes a guide groove 24, a valve cavity 4 and a thread groove 25 which are sequentially penetrated, and inner diameters of the guide groove 24, the valve cavity 4 and the thread groove 25 are sequentially increased; the thread groove 25 is used for being installed on an external thread section of the conduction connector 2; a limiting end face is formed at the joint of the guide groove 24 and the valve cavity 4, and when the male plug connector 9 is not plugged and conducted, the end face of the limiting valve cover 14 is abutted against the limiting end face, so that the limiting of the valve core assembly 5 in the axial direction is realized. Wherein the guide groove 24, the valve cavity 4 and the thread groove 25 are coaxially arranged. When the male plug-in connector 9 is plugged and conducted, the connection section of the male plug-in connector 9 enters the conduction channel 10 of the valve core assembly 5 through the guide groove 24, one end of the male plug-in connector 9 abuts against the sealing gasket 13, the male plug-in connector 9 is continuously inserted, the valve rod 7 is pressed downwards to enable the conduction groove 11 on the valve rod 7 to be exposed out of the through cavity 8 and enter the conduction interface 2, and the conduction interface 2 is in conduction connection with the male plug-in connector 9 through the conduction groove 11 and the conduction channel 10.

Referring to fig. 1-3, the body 1 of the present embodiment is a three-way member, and the branch joints at both ends of the three-way member are provided with a quick pipe joint 26, which specifically includes a movable member 27 and a plurality of elastic pieces 28 installed in the quick pipe joint 26; the movable piece 27 can slide along the axial direction of the shunt interface, the elastic sheet 28 is arranged along the radial direction of the shunt interface, and the elastic sheet 28 can be pressed and opened by pressing the movable piece 27 axially; when the connection hose is installed at the shunt interface, only the movable part 27 needs to be pressed, then the movable part 27 is loosened after the connection hose is directly inserted, and at the moment, the elastic sheet 28 resets and can be clamped on the connection hose, so that the hose can be quickly installed without the help of tools. The problem of the connection of conventional shunt joint in market need additionally install the adapter and lead to awkward is solved.

In this embodiment, the two return elastic members are springs.

In the embodiment, the valve rod of the valve core assembly is circumferentially provided with the conduction groove, and the conduction groove is sealed in the through cavity of the valve sleeve; when the external male plug connector starts to be connected in a plugging way, the external male plug connector cannot be directly conducted, and only when the valve rod is pressed down through the male plug connector, the conducting groove on the valve rod is separated from the through cavity and then is conducted and connected with the conducting interface of the body; in the process of disassembling the male plug connector, the sealing gasket on the valve rod is pushed to move synchronously with the male plug connector through the reset elastic piece, so that media such as internal gas are prevented from leaking, and the overall leakage prevention effect is good.

The second embodiment:

referring to fig. 15, the difference between the present embodiment and the first embodiment is: valve barrel 6 is integrated into one piece and sets up in body 1 conduction interface 2 department, and the internal diameter that link up the chamber 8 is less than the internal diameter of conduction interface 2 department.

Example three:

referring to fig. 16, the difference between the present embodiment and the first embodiment is: the valve sleeve 6 is fixedly arranged on the conduction interface 2 through threaded connection; the limiting of the valve core assembly 5 in the axial direction is realized by mounting a limiting bolt with the diameter larger than that of the valve rod 7 at the bottom of the valve rod 7, and the limiting of the whole valve core assembly 5 in the axial direction is realized. The valve seat 3 of the present embodiment thus comprises a valve chamber 4 and a threaded groove 25 which pass through one another in succession.

Example four:

referring to fig. 17, the difference between the present embodiment and the first embodiment is: the limit valve cover 14 is integrally formed with the valve rod 7; the sealing gasket 13 is arranged in the conducting channel 10 at the upper end of the valve rod 7 through interference fit.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A quick disconnect coupling comprising: the valve core assembly comprises a body (1), wherein a valve seat (3) is detachably mounted at a conducting interface (2) of the body (1), and a valve core assembly (5) is axially and slidably mounted in a valve cavity (4) of the valve seat (3); the valve seat (3) is provided with a locking structure, and the locking structure comprises a movable buckling ring (18) which is axially and slidably arranged on the valve seat (3) and steel balls (19) which are circumferentially distributed on the valve seat (3) at equal intervals; the method is characterized in that: the valve sleeve (6) is connected to the conduction interface (2), the valve rod (7) of the valve core assembly (5) is axially and slidably mounted in a through cavity (8) of the valve sleeve (6), and the through cavity (8) is communicated with the conduction interface (2); the valve core assembly (5) is provided with a conduction channel (10) corresponding to the external male plug connector (9); the guide groove (22) of the movable snap ring (18) pushes the steel ball (19) to abut against the limiting valve cover (14) of the valve core assembly (5) in the circumferential direction; when the valve core assembly is conducted, one end of the male plug (9) is inserted into the conducting channel (10), the valve core assembly (5) is pressed downwards to enable the conducting channel (10) to be connected and conducted with the conducting interface (2), and the movable buckling ring (18) pushes the steel ball (19) to be locked with the male plug (9).

2. The quick disconnect coupling of claim 1, wherein: the valve rod (7) is provided with a plurality of radially distributed conducting grooves (11), and the conducting grooves (11) are communicated with the conducting channel (10); the conduction groove (11) is sealed in the through cavity (8) in the circumferential direction; when the valve rod is communicated, the external male plug (9) pushes the conducting groove (11) of the valve rod (7) to be downwards separated from the through cavity (8) and communicated with the conducting interface (2).

3. The quick disconnect coupling of claim 1, wherein: the locking structure further comprises a second elastic resetting piece (20), and the second elastic resetting piece (20) is arranged between the movable clamping ring (18) and the valve seat (3); and an annular clamping groove (23) matched with the steel ball (19) is formed in the outer circumferential surface of the male plug-in connector (9).

4. The quick disconnect coupling of claim 1, wherein: a first reset elastic piece (12) is arranged between the valve core assembly (5) and the valve sleeve (6); the first reset elastic piece (12) is sleeved on the valve rod (7); the upper end of a limiting valve cover (14) of the valve core assembly (5) is limited and abutted against the bottom of the valve cavity (4) when the male plug connector (9) is not plugged and conducted, and the valve core assembly (5) further comprises a sealing gasket (13) installed in the valve rod (7).

5. The quick disconnect coupling of claim 4, wherein: the limiting valve cover (14) is buckled on the valve rod (7); the valve rod (7), the sealing gasket (13) and the limiting valve cover (14) form the conducting channel (10); the lower end of the limiting valve cover (14) is used for limiting the sealing gasket (13) to abut against the inside of the valve rod (7), and the male plug connector (9) abuts against the sealing gasket (13) when being plugged and conducted.

6. The quick disconnect coupling of claim 2, wherein: the valve rod (7) is correspondingly sleeved with a first sealing ring (15) and a second sealing ring (16) on two sides of the conduction groove (11).

7. The quick disconnect coupling of claim 1, wherein: the outer diameter of the connecting section of the external male plug-in connector (9) is less than or equal to the outer diameter of the limiting valve cover (14).

8. The quick disconnect coupling of claim 1, wherein: the valve seat (3) is installed at the conduction interface (2) through threaded connection, and the valve sleeve (6) is detachably installed on the conduction interface (2); the conduction channel (10), the through cavity (8) and the conduction interface (2) are coaxially arranged.

9. The quick disconnect coupling of claim 8, wherein: a limiting piece (21) is buckled on the valve seat (3); when the external male plug connector (9) is plugged and conducted, the inner side end of the movable buckle ring (18) abuts against the limiting piece (21).

10. The quick disconnect coupling of claim 1, wherein: and a quick-mounting pipe joint (26) is arranged at the shunt connector of the body (1).

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