CN215807015U

CN215807015U - Quick coupling

Info

Publication number: CN215807015U
Application number: CN202120957831.3U
Authority: CN
Inventors: 金文祥
Original assignee: Zhejiang Yihua Refrigeration Equipment Co ltd
Current assignee: Zhejiang Yihua Refrigeration Equipment Co ltd
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2022-02-11
Anticipated expiration: 2031-05-07
Also published as: FR3122716A3; FR3122716B3

Abstract

The application relates to a quick connector, which comprises a male connector and a female connector, wherein the male connector comprises a male cylinder, and the inner periphery of one end, facing the female connector, of the male cylinder is provided with a sealing surface; the end face of the male cylinder body facing the female joint is coaxially provided with a hard sealing ring; the female joint comprises a female cylinder body and a sealing sleeve; the end face, facing the male connector, of the female cylinder body is used for extruding the hard sealing ring; the sealing sleeve is coaxially connected in the female cylinder body, and the outer periphery of the sealing sleeve is attached to the inner periphery of the female cylinder body; one end of the sealing sleeve extends out of the female cylinder body and is embedded into the male cylinder body, and the periphery of the sealing sleeve is attached to the sealing surface. After the male connector and the female connector are connected, the sealing sleeve is embedded into the male barrel, and sealing is formed between the periphery of the sealing sleeve and the sealing surface; meanwhile, the hard sealing ring extrudes the end face of the female cylinder body, hard contact sealing is realized, two parts are sealed, the tightness of the joint is effectively ensured, the joint is convenient to install, no professional or special equipment is needed, and the installation cost is reduced.

Description

Quick coupling

Technical Field

The application relates to the field of pipe connection components, in particular to a quick connector.

Background

The present air conditioner generally comprises an indoor unit and an outdoor unit, and is called a split type air conditioner. In the traditional technology, a stop valve is used as a connecting joint, vacuumizing is needed after connection, air in an indoor unit and a pipeline is pumped, special equipment for professional personnel is needed for installation, very high installation cost is needed, and especially the installation cost of an air conditioner in European and American areas is basically equal to the price of the air conditioner.

SUMMERY OF THE UTILITY MODEL

To reduce the cost of installing the coupling, the present application provides a quick coupling.

The application provides a quick-operation joint adopts following technical scheme:

a quick connector comprises a male connector and a female connector;

the male connector comprises a male barrel body and a plug; the inner periphery of the male cylinder body is provided with a sealing ring; the plug is connected in the male cylinder body in a sliding manner; and the periphery of the plug is used for extruding the surface of the sealing ring, which is far away from the female joint;

the female joint comprises a female cylinder body, a shaft body, a butting joint and a sealing sleeve connected in the female cylinder body in a sliding manner; the female cylinder body is coaxially connected with the male cylinder body; the shaft body is fixedly connected with the female cylinder body, and one end of the shaft body extends out of the female cylinder body and is embedded into the male cylinder body; the abutting joint is connected to the end part of the shaft body extending out of the female cylinder body; the end part of the abutting joint, which is far away from the shaft body, is used for extruding and blocking the end part of the butt joint, which is far towards the female joint.

By adopting the technical scheme, before the male connector is connected with the female connector, the male sealing ring and the plug are matched with the sealing ring to plug the male cylinder, and a pipeline connected with the male connector keeps a closed state;

after the male connector and the female connector are connected, the abutting joint enables the plug and the male sealing ring to be separated from the sealing ring, and the male connector is communicated with the female connector; the male connector and the female connector are convenient to install, no professional is needed, no special equipment is needed, the pipeline connection efficiency is improved, and the installation cost is reduced.

Optionally, the seal sleeve comprises a sleeve and a female seal ring, and the outer periphery of the sleeve is in sliding fit with the inner periphery of the female cylinder body; one end of the sleeve extends out of the female cylinder body and is embedded into the male cylinder body; the female sealing ring is connected to the end part of the sleeve facing the abutting head; the female seal ring is used for extruding the abutting joint.

By adopting the technical scheme, before the male connector is connected with the female connector, the female sealing ring extrudes the butt joint, and the butt joint is matched with the fit sealing between the periphery of the sleeve and the inner periphery of the female cylinder to plug the female cylinder, so that a pipeline connected with the female connector is kept in a closed state;

after the male connector and the female connector are connected, the sealing ring enables the female sealing ring to be separated from the abutting joint, and the male connector is communicated with the female connector.

Optionally, outer clamping grooves are axially arranged at intervals on the periphery of the sleeve, and an O-shaped ring is embedded in each outer clamping groove;

the inner periphery of the male cylinder body is provided with a sealing surface, and the sealing surface is positioned on one side of the sealing ring facing the female joint;

the outer periphery of at least one O-shaped ring is used for extruding the sealing surface, and the outer periphery of at least one O-shaped ring is used for extruding the inner periphery of the female cylinder body.

By adopting the technical scheme, the O-shaped ring and the inner periphery of the female cylinder body are mutually extruded, and the sleeve and the female cylinder body are sealed through the deformation of the O-shaped ring; meanwhile, when the female connector is connected with the male connector, the O-shaped ring is embedded into the male barrel and is extruded with the sealing surface, and the sealing between the sleeve and the male barrel is realized through the deformation of the O-shaped ring.

Optionally, the plug comprises a plug and a male sealing ring; a male clamping groove is formed in the periphery of the plug, and the male sealing ring is adhered to the male clamping groove in a vulcanization or sleeving mode;

the sleeve is equipped with the end draw-in groove towards the terminal surface of butt head, female sealing washer bonds to the end draw-in groove in through the mode of vulcanizing or inlaying and establishing.

By adopting the technical scheme, the male sealing ring is precisely attached to the side wall of the male clamping groove in a vulcanization mode, no gap exists between the surface of the male sealing ring and the side wall of the male clamping groove, and the sealing property is ensured; and the female sealing ring is precisely attached to the side wall of the end clamping groove, so that no gap exists between the surface of the female sealing ring and the side wall of the female clamping groove, and the sealing property is ensured.

Optionally, a hard sealing ring is arranged on the end face, facing the female joint, of the male cylinder body; the ring width of the hard sealing ring is reduced along the axial direction of the male cylinder body along the direction away from the male cylinder body;

the hard sealing ring is used for extruding the end face of the female cylinder body.

By adopting the technical scheme, after the female joint and the male joint are connected, the hard sealing ring extrudes the end surface of the female cylinder body, and then hard contact sealing is realized between the end part of the male cylinder body and the end part of the female cylinder body; the sealing between the sealing sleeve and the male barrel body and the sealing between the sealing sleeve and the female barrel body are matched, so that the tightness of the joint is further ensured.

Optionally, the inner periphery and the outer periphery of the hard sealing ring are both conical surfaces, and the inner periphery of the hard sealing ring is adjacent to the outer periphery of the hard sealing ring, so that a sealing knife edge is formed;

the sealing knife edge is used for extruding the end face of the female cylinder body.

By adopting the technical scheme, when the hard sealing ring extrudes the female cylinder, the sealing knife edge extrudes the female cylinder, so that the contact area is reduced, the pressure intensity is increased to be beneficial to the deformation of the hard sealing ring and the female cylinder, the hard sealing ring and the female cylinder are more tightly attached, and the sealing performance is favorably improved.

Optionally, a ring groove is formed in the periphery of the female cylinder body; the female cylinder body also comprises a connecting sleeve; the inner periphery of the connecting sleeve is provided with a snap ring which is embedded into the annular groove to realize the coaxial rotary connection between the connecting sleeve and the female cylinder body;

the connecting sleeve is sleeved on the periphery of the male barrel body and is connected with the male barrel body in a sleeved mode, and relative fixation is achieved through threaded connection.

By adopting the technical scheme, the connecting sleeve and the female cylinder body can rotate relatively, and the connecting sleeve is fixed with the male cylinder body through threaded connection, so that the connection can be completed only by the rotation of the connecting sleeve in the process of connecting the male joint and the female joint; in the connecting process, the male cylinder body and the pipeline connected with the male cylinder body do not rotate, and the female cylinder body and the pipeline connected with the female cylinder body do not rotate.

Optionally, the female joint further comprises a washer, a connecting column, a nut and a female elastic member; the gasket is fixedly connected in the female cylinder body;

the connecting column is coaxially connected to one end, far away from the abutting joint, of the shaft body; the connecting column penetrates through the washer, and the shaft body extrudes the end face of the washer, which faces the male connector; the nut is connected to the periphery of the connecting column through threads, and the nut extrudes the end face of the washer, which deviates from the male connector;

one end of the female elastic piece extrudes the gasket, and the other end extrudes the sleeve.

Through adopting above-mentioned technical scheme, realize the fixed connection between center pin and the female barrel to utilize the auto-lock characteristic of screw thread, guarantee the reliability of being connected between center pin and the packing ring.

Optionally, the male connector further comprises a fixing plate, a guide rod and a male elastic part; the fixing piece is fixedly connected in the male cylinder body;

the guide rod is positioned on one side, away from the female joint, of the plug, and the outer diameter of the guide rod is smaller than that of the plug; the guide rod penetrates through the fixing sheet in a sliding manner;

one end of the male elastic piece extrudes the fixing piece, and the other end of the male elastic piece extrudes the plug.

Through adopting above-mentioned technical scheme, realize the axial fixity between packing ring and the female barrel, and then realize the axial fixity between center pin and the female barrel.

Optionally, the male connector further comprises a retainer ring, the retainer ring is sleeved on the outer periphery of the plug, and the outer periphery of the retainer ring is in sliding fit with the inner periphery of the male barrel;

one end of the male elastic piece extrudes the fixing piece, and the other end of the male elastic piece extrudes the check ring.

By adopting the technical scheme, the radial limiting and the axial sliding between the plug and the male cylinder body are realized, and the male cylinder body is plugged by utilizing the elastic force of the male elastic piece when the male connector is not connected with the female connector; when the male connector is connected with the female connector, the central shaft pushes the plug to overcome the elastic force of the male elastic piece, so that the male connector is communicated with the female connector.

Optionally, the plug further comprises a retainer ring, the retainer ring is sleeved on the outer periphery of the plug, and the outer periphery of the retainer ring is in sliding fit with the inner periphery of the male cylinder;

By adopting the technical scheme, the blockage is in the axial sliding process, the radial limitation between the plug and the male cylinder body is realized through the fixing piece, so that the male sealing ring is ensured to correctly extrude the sealing ring, and further, when the male connector is not connected with the female connector, the blockage of the male cylinder body is effectively ensured.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the male joint and the female joint are convenient to install, no professional and no special equipment are needed, the pipeline connection efficiency is improved, and the installation cost is reduced;

2. after the male joint and the female joint are connected, a sealing sleeve in the female joint is embedded into the male cylinder, and sealing is formed between the periphery of the sealing sleeve and a sealing surface; meanwhile, the hard sealing ring extrudes the end face of the female cylinder body, and hard contact sealing is further realized between the end part of the male cylinder body and the end part of the female cylinder body.

3. When the male connector is not connected with the female connector, the sealing ring, the plug and the male elastic piece are matched with each other to plug the male connector; simultaneously, center pin, seal cover and female elastic component mutually support to the shutoff female connects.

Drawings

Fig. 1 is a schematic structural view of a quick coupling.

Fig. 2 is a schematic structural view of the male connector.

Fig. 3 is a schematic view of the structure of the female connector.

FIG. 4 is a schematic view showing the structure of the male connector and the female connector in example 1.

FIG. 5 is a schematic view showing the structure of the male connector and the female connector in example 1 after the connection is completed.

FIG. 6 is a schematic view showing the structure of the male connector and the female connector in example 2 after the connection is completed.

Fig. 7 is an enlarged view at a in fig. 6.

FIG. 8 is a schematic view showing the structure of the male connector and the female connector in example 3 after the connection is completed.

Description of reference numerals: 1. a male connector; 11. a male barrel body; 111. a first cylinder; 112. a second cylinder; 113. a seal ring; 114. caulking grooves; 115. a hard seal ring; 116. a guard ring; 117. a sealing surface; 12. a fixing sheet; 13. blocking; 131. a plug; 132. a male seal ring; 133. a retainer ring; 134. a guide bar; 135. a male card slot; 136. a baffle groove; 14. a male elastic member;

2. a female joint; 21. a female cylinder body; 211. a ring groove; 22. connecting sleeves; 221. a snap ring; 23. a fixed cylinder; 231. a limiting ring; 24. a gasket; 25. a central shaft; 251. a shaft body; 252. connecting columns; 253. a nut; 254. a butting head; 26. sealing sleeves; 261. a sleeve; 262. a female seal ring; 263. an O-shaped ring; 264. an outer clamping groove; 265. an end card slot; 27. a female elastic member;

3. and a through hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

Referring to fig. 1, the embodiment of the present application discloses a quick coupling, which includes a male coupling 1 and a female coupling 2; the male connector 1 and the female connector 2 are connected with each other to realize the communication of two pipelines.

Example 1

Referring to fig. 1 and 2, the male connector 1 includes a male cylinder 11, a fixing piece 12, a plug 13, and a male elastic member 14.

The male cylinder 11 includes a first cylinder 111 and a second cylinder 112 which are coaxial. An internal thread is arranged on the inner periphery of one end of the first cylinder 111 and is used for connecting a pipeline; the periphery of the other end of the first cylinder 111 is provided with an external thread; an internal thread is arranged on the inner periphery of one end of the second cylinder 112 and is used for connecting with an external thread of the first cylinder 111; the periphery of the other end of the second cylinder 112 is provided with an external thread for connecting the female joint 2.

The inner circumference of the second cylinder 112 is coaxially provided with a sealing ring 113, and the sealing ring 113 is positioned in the middle of the second cylinder 112 in the axial direction; the plug 13 is coaxially slidably connected in the male cylinder 11, and the plug 13 is located on the side of the sealing ring 113 facing the first cylinder 111. The end of the sealing ring 113 facing the first cylinder 111 is provided with a chamfer for sealing engagement with the plug 13.

A caulking groove 114 is coaxially provided on the inner periphery of one end of the first cylinder 111 facing the second cylinder 112, and the caulking groove 114 penetrates the first cylinder 111 in a direction approaching the seal ring 113. The fixing piece 12 is inserted into the insertion groove 114 and is coaxial with the first cylinder 111.

Plug 13 includes coaxially disposed plug 131, male seal 132, retainer 133, and guide rod 134. A male clamping groove 135 is formed in the periphery of the plug 131; the male sealing ring 132 is embedded into the male clamping groove 135 in a vulcanization mode, so that the male sealing ring 132 is sleeved on the periphery of the plug 131 and is axially fixed; and the outer periphery of the male seal ring 132 is used for matching the chamfer of the seal ring 113 to realize plugging.

A blocking groove 136 is further formed in the periphery of the plug 131, and the blocking groove 136 penetrates through the plug 131 in the direction away from the sealing ring 113; the retainer ring 133 is sleeved on the periphery of the plug 131 and attached to the side wall of the retainer groove 136 facing the first cylinder 111; the outer diameter of the retainer ring 133 is larger than the outer diameter of the plug 131, and the outer periphery of the retainer ring 133 is in sliding fit with the inner periphery of the second cylinder 112, so that radial limiting between the plug 131 and the male cylinder 11 is realized.

The guide rod 134 is coaxially connected to one end of the plug 131 facing the first cylinder 111, and the outer diameter of the guide rod 134 is smaller than that of the plug 131; one end of the guide rod 134 far away from the plug 131 slides and penetrates through the fixing sheet 12 to realize radial limiting between the guide rod 134 and the male barrel body 11.

The male elastic member 14 may be a spring, the male elastic member 14 is sleeved to the outer periphery of the plug 13, one end of the male elastic member 14 presses the retainer ring 133, and the other end presses the fixing piece 12, so that the male sealing ring 132 presses the chamfer of the sealing ring 113 by using the elastic force of the male elastic member 14, so as to achieve the sealing between the plug 13 and the sealing ring 113.

Meanwhile, the retainer ring 133 and the fixing piece 12 are provided with through holes 3 at intervals along the circumferential direction of the retainer ring and the fixing piece, and the through holes 3 are used for allowing fluid to pass through.

Referring to fig. 1 and 3, the female joint 2 includes a female cylinder 21, a connection sleeve 22, a fixed cylinder 23, a gasket 24, a center shaft 25, a seal sleeve 26, and a female elastic member 27.

The periphery of the female cylinder body 21 is provided with a ring groove 211; a snap ring 221 is coaxially arranged on the inner periphery of one end of the connecting sleeve 22; the connecting sleeve 22 is coaxially and rotatably sleeved on the periphery of the female cylinder body 21, and the inner diameter and the outer diameter of one end of the connecting sleeve 22 are reduced by adopting a reducing process, namely the inner diameter of the snap ring 221 is reduced, so that the snap ring 221 is embedded into the annular groove 211, the rotary connection between the connecting sleeve 22 and the female cylinder body 21 is further realized, and the axial limit is realized; one end of the mother cylinder 21 is positioned in the connecting sleeve 22, and the other end extends out of the connecting sleeve 22; the inner circumference of the connection sleeve 22 is provided with an internal thread for connecting the external thread of the second cylinder 112.

The fixed cylinder 23 and the female cylinder 21 are coaxially arranged, a limiting ring 231 is arranged on the inner periphery of the fixed cylinder 23 and in the middle of the fixed cylinder along the axial direction of the fixed cylinder, and the limiting ring 231 can be processed and formed in a mode of rolling the outer periphery of the fixed cylinder 23; the gasket 24 is coaxially embedded in the fixed cylinder 23, and the gasket 24 is attached to one end of the limiting ring 231 facing the female cylinder 21; the fixed cylinder 23 is coaxially sleeved to the periphery of one end of the mother cylinder 21 extending out of the connecting sleeve 22, and the gasket 24 is attached to the end face of the mother cylinder 21; the inner circumference of the fixed cylinder 23 and the outer circumference of the female cylinder 21 can be fixedly connected by adopting interference fit, gluing and other modes; the limiting ring 231 is matched with the female cylinder 21 to realize the fixed connection between the gasket 24 and the female cylinder 21; meanwhile, the fixed cylinder 23 may be integrally formed with the pipe.

The central shaft 25 includes a shaft body 251, a connecting column 252, and an abutting head 254. The shaft body 251 and the gasket 24 are coaxially arranged, and the shaft body 251 is positioned on one side of the gasket 24 facing the female cylinder body 21, so that the end part of the shaft body 251 is attached to the end surface of the gasket 24; meanwhile, one end of the shaft 251, which is far away from the washer 24, extends out of the connecting sleeve 22. The connecting column 252 is coaxially connected to one end of the shaft body 251 facing the fixed cylinder 23, the connecting column 252 penetrates through the gasket 24, and the outer diameter of the connecting column 252 is smaller than that of the shaft body 251; the connecting post 252 may be in the form of a rivet connection to provide a coaxial fixed connection between the central shaft 25 and the washer 24. The abutting head 254 is coaxially connected to the periphery of one end of the shaft body 251 away from the connecting column 252, and the baffle ring 254 is located outside the connecting sleeve 22; meanwhile, the diameter of the abutment head 254 is larger than the outer diameter of the shaft body 251.

The sealing sleeve 26 and the female elastic part 27 are coaxially sleeved on the periphery of the shaft body 251, and the sealing sleeve 26 and the female elastic part 27 are located between the abutting head 254 and the gasket 24; meanwhile, the sealing sleeve 26 is axially slidably connected in the female cylinder 21.

Gland 26 includes sleeve 261, female seal 262, and O-ring 263. The inner diameter of the sleeve 261 is smaller than the diameter of the abutting head 254 and larger than the diameter of the shaft body 251; the end of the sleeve 261 remote from the washer 24 extends out of the connection sleeve 22 and is intended to be inserted into the male connector 1; the end part of the sleeve 261 facing the abutting head 254 is provided with an end clamping groove 265; the female seal ring 262 is embedded into the end clamping groove 265 in a vulcanization mode, and the female seal ring 262 covers the end of the sleeve 261; the female seal ring 262 is realized to be attached to the end surface of the baffle ring 254; outer clamping grooves 264 are axially arranged at intervals on the periphery of the sleeve 261; the O-shaped rings 263 are embedded in the outer clamping grooves 264 and correspond to each other one by one; the outer periphery of the O-ring 263 presses the inner periphery of the female cylinder 21 and realizes a sliding seal.

The female elastic member 27 may be a spring, and one end of the female elastic member 27 presses the gasket 24, and the other end of the female elastic member 27 presses the sleeve 261, so that the female sealing ring 262 presses the abutment head 254 by using the elastic force of the female elastic member 27, thereby achieving the sealing between the sealing sleeve 26 and the stop ring 254.

Meanwhile, the gasket 24 is also provided with through holes 3 at intervals along the circumferential direction of the gasket, and the through holes 3 are used for allowing fluid to pass through.

Referring to fig. 4 and 5, a sealing surface 117 is further disposed at the inner periphery of the second cylinder 112; the sealing surface 117 is a cylindrical surface and is positioned on one side of the sealing ring 113 facing the female joint 2; the inner diameter of the sealing surface 117 is equal to that of the female cylinder 21, so that the sealing sleeve 26 can be coaxially embedded; at the same time, the outer periphery of the O-ring 263 presses against the sealing surface 117 to effect a seal.

The shaft 251 extends out of the end of the connecting sleeve 22, so that the abutting head 254 is used for abutting against the plug 131; the abutment head 254 has a diameter no greater than the inner diameter of the sealing ring 113, and the inner diameter of the sealing ring 113 is less than the outer diameter of the sleeve 261.

When the male connector 1 and the female connector 2 are connected with each other, the sealing sleeve 26 and the central shaft 25 are embedded into the first cylinder 111; subsequently, the nipple 22 contacts the second cylinder 112. The connecting sleeve 22 is in threaded connection with the second cylinder 112, so that the female cylinder 21 and the second cylinder 112 are close to each other, the abutting head 254 is attached to the plug 131, and the sealing sleeve 26 is attached to the sealing ring 113; continuing to rotate the connecting sleeve 22, so that the female cylinder 21 and the second cylinder 112 are continuously close to each other, the central shaft 25 pushes the plug 13 and enables the male elastic part 14 to be compressed and deformed, and the sealing ring 113 blocks the sealing sleeve 26 and enables the female elastic part 27 to be compressed and deformed; the connecting sleeve 22 is tightened, so that the female cylinder 21 and the first cylinder 111 are mutually squeezed, the abutting head 254 penetrates through the sealing ring 113, and a gap is formed between one end of the abutting head 254, which faces away from the plug 13, and the sealing ring 113.

After the male connector 1 and the female connector 2 are connected, the through hole 3 of the gasket 24, the distance between the outer periphery of the central shaft 25 and the inner periphery of the sealing sleeve 26, the distance between the outer periphery of the central shaft 25 and the inner periphery of the sealing ring 113, the distance between the outer periphery of the central shaft 25 and the inner periphery of the first cylinder 111, the distance between the outer periphery of the plug 13 and the inner periphery of the first cylinder 111, the through hole 3 of the retainer ring 133 and the through hole 3 of the fixing piece 12 are communicated with each other to form a channel for fluid circulation, namely, two pipelines are communicated.

Referring to fig. 5, three slots are provided at intervals along the axial direction of the sleeve 261, and after the male connector 1 and the female connector 2 are connected, the outer periphery of the female seal ring 262 and the outer periphery of one O-ring 263 both squeeze the sealing surface 117; the outer peripheries of the two O-rings 263 press the inner periphery of the female cylinder 21; the end surface of the female seal ring 262 presses the seal ring 113; sealing between the sealing sleeve 26 and the male cylinder body 11 and between the sealing sleeve 26 and the female cylinder body 21 is realized.

Example 2

Referring to fig. 6 and 7, the present embodiment is different from embodiment 1 in that: the end of the second cylinder 112 facing away from the first cylinder 111 is also provided coaxially with a hard sealing ring 115 and a guard ring 116.

The inner periphery and the outer periphery of the hard sealing ring 115 are both conical surfaces, the diameter large end of the conical surface of the inner periphery of the hard sealing ring 115 deviates from the first cylinder 111, and the diameter small end of the conical surface of the outer periphery of the hard sealing ring 115 deviates from the first cylinder 111; the inner circumference and the outer circumference of the hard sealing ring 115 are adjacent, and a sealing knife edge is formed at one end of the hard sealing ring 115, which is far away from the first cylinder 111; the sealing knife edge is used for hard extrusion of the end face of the female cylinder body 21; at the same time, the tapered surface of the inner periphery of hard seal 115 is adjacent to sealing surface 117 to provide guidance during insertion of gland 26.

The inner diameter of the guard ring 116 is greater than the maximum outer diameter of the hard seal ring 115; and the axial length of the protective ring 116 is greater than the axial length of the hard sealing ring 115, so that the sealing knife edge is positioned in the protective ring 116 to prevent external impurities from colliding with the sealing knife edge. Meanwhile, the end face of the female cylinder 21 is free from the guard ring 116.

The connecting sleeve 22 is screwed down to complete the connection of the male connector 1 and the female connector 2, and the sealing knife edge extrudes the end face of the female cylinder 21 to realize hard contact sealing; and the sealing of the joint is ensured by matching each O-shaped ring 263 and the elastic sealing ring.

Example 3

Referring to fig. 8, the present embodiment is different from embodiment 1 in that: the central shaft 25 also includes a nut 253. The periphery of the connecting column 252 is provided with threads; the nut 253 is positioned on one side of the washer 24, which faces away from the shaft body 251, and is connected to the periphery of the connecting column 252 through threads, so that the nut 253 presses the end face, which faces away from the shaft body 251, of the washer 24, and a coaxial fixed connection between the central shaft 25 and the washer 24 is realized.

Compared with riveting, the threaded connection between the nut 253 and the connecting column 252 has higher connection strength, and when the size and the stress of the female joint 2 are increased, the threaded connection ensures the connection reliability.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A quick coupling, its characterized in that: comprises a male connector (1) and a female connector (2);

the male connector (1) comprises a male barrel body (11) and a plug (13); the inner periphery of the male cylinder body (11) is provided with a sealing ring (113); the plug (13) is connected in the male barrel body (11) in a sliding manner; and the periphery of the plug (13) is used for pressing the surface of the sealing ring (113) which is far away from the female joint (2);

the plug (13) comprises a plug (131) and a male sealing ring (132); a male clamping groove (135) is formed in the periphery of the plug (131), and the male sealing ring (132) is adhered to the male clamping groove (135) in a vulcanization or sleeving mode; the outer periphery of the male sealing ring (132) is used for matching the sealing ring (113) to realize sealing;

the female joint (2) comprises a female cylinder body (21), a shaft body (251), a butting head (254) and a sealing sleeve (26) connected in the female cylinder body (21) in a sliding mode; the female cylinder body (21) is coaxially connected with the male cylinder body (11); the shaft body (251) is fixedly connected with the female cylinder body (21), and one end of the shaft body (251) extends out of the female cylinder body (21) and is used for being embedded into the male cylinder body (11); the abutting joint (254) is connected with the end part of the shaft body (251) extending out of the female cylinder body (21); the end of the abutment head (254) facing away from the shaft body (251) serves to press the end of the plug (13) towards the female connector (2).

2. The quick connector of claim 1, wherein: the sealing sleeve (26) comprises a sleeve (261) and a female sealing ring (262), and the outer periphery of the sleeve (261) is in sliding fit with the inner periphery of the female cylinder body (21); one end of the sleeve (261) extends out of the female cylinder body (21) and is used for being embedded into the male cylinder body (11); the female sealing ring (262) is connected to the end part of the sleeve (261) facing the abutting head (254); the female seal ring (262) is used for pressing the abutting joint head (254).

3. The quick connector of claim 2, wherein: outer clamping grooves (264) are axially arranged at intervals on the periphery of the sleeve (261), and an O-shaped ring (263) is embedded in each outer clamping groove (264);

the inner periphery of the male cylinder body (11) is provided with a sealing surface (117), and the sealing surface (117) is positioned on one side of the sealing ring (113) facing the female joint (2);

the outer periphery of at least one O-shaped ring (263) is used for pressing the sealing surface (117), and the outer periphery of at least one O-shaped ring (263) is used for pressing the inner periphery of the female cylinder body (21).

4. The quick connector of claim 2, wherein:

sleeve (261) are equipped with end draw-in groove (265) towards the terminal surface of butt head (254), female sealing washer (262) bond to in end draw-in groove (265) through the mode of vulcanizing or inlaying and establishing.

5. The quick connector of claim 2, wherein: the end face, facing the female joint (2), of the male cylinder body (11) is provided with a hard sealing ring (115); the ring width of the hard sealing ring (115) is reduced along the axial direction of the male cylinder body (11) along with the distance from the male cylinder body (11);

the hard sealing ring (115) is used for extruding the end face of the female cylinder body (21).

6. The quick connector of claim 5, wherein: the inner periphery and the outer periphery of the hard sealing ring (115) are conical surfaces, and the inner periphery of the hard sealing ring (115) is adjacent to the outer periphery of the hard sealing ring, so that a sealing knife edge is formed;

the sealing knife edge is used for extruding the end face of the female cylinder body (21).

7. The quick connector of claim 1, wherein: a ring groove (211) is formed in the periphery of the female cylinder body (21); the female joint (2) further comprises a connecting sleeve (22); the inner periphery of the connecting sleeve (22) is provided with a clamping ring (221), the clamping ring (221) is embedded into the annular groove (211), and coaxial rotating connection between the connecting sleeve (22) and the female cylinder body (21) is achieved;

the connecting sleeve (22) is sleeved on the periphery of the male cylinder body (11) in a sleeved mode and is fixed relatively through threaded connection.

8. The quick connector of claim 2, wherein: the female joint (2) further comprises a washer (24), a connecting column (252), a nut (253) and a female elastic piece (27); the gasket (24) is fixedly connected in the female cylinder body (21);

the connecting column (252) is coaxially connected to one end, far away from the abutting head (254), of the shaft body (251); the connecting column (252) penetrates through the gasket (24), and the shaft body (251) presses the end face of the gasket (24) towards the male connector (1); the nut (253) is connected to the periphery of the connecting column (252) through threads, and the nut (253) extrudes the end face of the washer (24) departing from the male connector (1);

one end of the female elastic member (27) presses the washer (24), and the other end presses the sleeve (261).

9. The quick connector of claim 1, wherein: the male connector (1) further comprises a fixing plate (12), a guide rod (134) and a male elastic piece (14); the fixing sheet (12) is fixedly connected in the male barrel body (11);

the guide rod (134) is positioned on one side, away from the female joint (2), of the plug (131), and the outer diameter of the guide rod (134) is smaller than that of the plug (131); the guide rod (134) penetrates through the fixing sheet (12) in a sliding mode;

one end of the male elastic piece (14) extrudes the fixing piece (12), and the other end of the male elastic piece (14) extrudes the plug (131).

10. The quick connector of claim 9, wherein: the male connector (1) further comprises a retaining ring (133), the retaining ring (133) is sleeved on the outer periphery of the plug (131), and the outer periphery of the retaining ring (133) is in sliding fit with the inner periphery of the male barrel body (11);

one end of the male elastic member (14) presses the fixing piece (12), and the other end of the male elastic member (14) presses the retainer ring (133).