A quick connector

Abstract

The application discloses a quick connector, which comprises a female connector and a male connector which are connected in pluggable and conductive modes; the female connector comprises a female connector shell, a female valve rod, a female annular valve sleeve, a female first sealing ring, a female second sealing ring and a female first spring; the female valve rod is provided with a head end sealing part, an internal communication cavity and a lateral through hole; the male connector comprises a male connector shell, a male valve core, a male spring and a male first sealing ring; thus, the structure of the female connector and the male connector is innovatively designed, the sealing ring is positioned in multiple directions by means of a simple structure, the sealing ring can be prevented from falling off in the plugging process and after the conductive process, the no-dripping design is realized, the safety of equipment and users is ensured, and the phenomenon that fluid is leaked to pollute the working environment when the loop is connected or disconnected is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas-liquid pipeline joint technology, in particular to a quick connector, which is mainly used as a liquid quick connector and can also be used as a gas quick connector. BACKGROUND

[0002] A quick connector is a connector that can realize pipeline connection or disconnection without tools. The quick connector mainly includes a gas quick connector and a liquid quick connector. Although the quick connectors on the market can realize quick connection or disconnection, their specific structural forms are various:

[0003] For example, CN 105953009 B discloses a public connector, a female connector, and a quick connector assembly for the field of gas-liquid pipeline joints. A sealing ring protection sleeve extending in the front-rear direction is arranged between the fixed valve core non-sealing section and the movable sealing sleeve in the female connector housing. The sealing ring protection sleeve has a protection sleeve channel for the fluid channel in the male and female connector housings to be connected. The male connector sealing ring is arranged on the sealing section of the male connector housing, and the outer periphery of the sealing ring protection sleeve has a first anti-dropping stop surface that cooperates with the male connector sealing ring in the radial direction when the male and female connectors are connected, and / or the female connector sealing ring is arranged on the sealing section of the sealing sleeve, and the outer periphery of the sealing ring protection sleeve has a second anti-dropping stop surface that cooperates with the female connector sealing ring in the radial direction when the male and female connectors are connected. This solves the problem that the current quick connector cannot be plugged in under pressure. In theory, the arrangement of the sealing ring protection sleeve can solve the problem of sealing ring falling off, but the structure is complex, the number of involved parts is large, the assembly precision is high, and the actual product is also prone to affecting the reliability of the sealing ring due to the limitation of the assembly precision.

[0004] For example, CN 105953008 B discloses a female connector and a quick connector assembly using the same in the field of gas-liquid pipeline joints. The female connector valve core moves forward and backward and is assembled in the female connector housing. The female connector housing is provided with an elastic pressing device. The female connector valve core is provided with a first stop surface facing the front of the female connector. The female connector housing is provided with a second stop surface facing the rear of the female connector for stop cooperation with the first stop surface after the female connector valve core overcomes the elastic force of the elastic pressing device and slides forward to a set stroke. The female connector sealing ring is arranged on the female connector valve core sealing segment / sealing sleeve sealing segment. The movable sealing sleeve / female connector valve core is provided with a recess on the front side / rear side of the female connector sealing ring before the first stop surface and the second stop surface stop cooperation, and the recess cooperates with the female connector sealing ring gap when the first stop surface and the second stop surface stop cooperation. The problem that the female connector connected with the cold plate cannot automatically release pressure when the pressure in the current cold plate increases is solved. Similarly, the setting of the sealing ring protection sleeve can solve the problem of sealing ring falling off, but the structure is relatively complex, the number of involved parts is relatively large, the assembly precision is high, and the sealing ring reliability is affected during actual product use due to the limitation of assembly precision.

[0005] For example, CN 110778829 A discloses a quick connector for detachably connecting two pipes through which a pressurized fluid flows, which consists of a male element and a female element. The male element includes a cylindrical male body defining a longitudinal cavity and a distal mouth, and a valve axially movable inside the cavity between a forward position in which it blocks the mouth and a retracted position in which it does not block the mouth. The female element includes a cylindrical female body defining a longitudinal cavity and a distal mouth, a pusher and a slide valve. The male body or the pusher delimits a fluid passage connecting the inside of the cavity of the male element or the female element to the distal mouth of the male element or the female element, respectively. The passage present inside the cavity of the male element or the female element cooperates inside a circle whose diameter is greater or smaller than the diameter of the first and second sealing gaskets, respectively. The passage extends between two planes perpendicular to the longitudinal axis, between a proximal plane and a distal plane, respectively, the two planes being offset relative to each other along the longitudinal axis X-X'. This kind of quick connector has a relatively simple structure, but in actual use, the sealing ring and the groove of this kind of quick connector are extremely easy to stick impurities, causing the valve core and the valve head to fail to reset, resulting in liquid leakage or even spraying. Moreover, in the on-state, since the sealing ring sleeve is arranged on the outer periphery of the valve and the push rod, the fluid always flushes the sealing ring, which is easy to cause the sealing ring to fall off. Once the sealing ring falls off, in the off-state (also referred to as the loop off-state), fluid leakage occurs, which pollutes the working environment.

[0006] Therefore, it is necessary to study a new technical solution to solve the above problems. SUMMARY

[0007] In view of the above, the present application aims at the defects of the prior art, and the main purpose is to provide a quick connector which is designed by innovating the structure of the female connector and the male connector, and by means of simple structure, the sealing ring is positioned in multiple directions, so that the sealing ring can be prevented from falling off in the process of plugging and unplugging and after being connected, the design of no dripping is realized, the safety of the equipment and the user is ensured, and the phenomenon of fluid leakage when the loop is connected / disconnected to pollute the working environment is avoided.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0009] A quick connector, comprising a female connector and a male connector which can be connected and disconnected by plugging.

[0010] The female connector comprises a female housing, a female valve rod, a female annular valve sleeve, a female first sealing ring, a female second sealing ring and a female first spring; the female housing has a first accommodating cavity penetrating through both ends in the inside; the inner wall surface of the outer section area of the first accommodating cavity is concavely provided with a first annular groove, and the female first sealing ring is installed in the first annular groove; the inner annular wall surface of the annular valve sleeve is concavely provided with a second annular groove, and the female second sealing ring is installed in the second annular groove; the outer end of the female first spring acts on the inner end of the annular valve sleeve, and the inner end of the female first spring acts on the female housing; the female valve rod has a head end sealing part, an internal communication cavity and a lateral through hole, the internal communication cavity is connected to the inner end of the first accommodating cavity, the lateral through hole is located on the inner side of the head end sealing part and is connected between the internal communication cavity and the first accommodating cavity, and the head end sealing part extends into the inside of the annular valve sleeve.

[0011] The male connector comprises a male housing, a male valve core, a male spring and a male first sealing ring; one end of the male housing has a plug section, the inside of the male housing has a second accommodating cavity at both ends of the male housing, and the second accommodating cavity penetrates through the inside of the plug section; the inner wall surface of the outer section area of the second accommodating cavity is concavely provided with a third annular groove, the male first sealing ring is installed in the third annular groove, the male valve core is located in the outer section area of the second accommodating cavity, the outer end of the male spring acts on the male valve core, and the inner end of the male spring acts on the male housing.

[0012] As a preferred solution, the outer end of the head end sealing part has a tapered convex part which is convex and gradually smaller, the outer end of the male valve core has a tapered concave groove which is concave and gradually larger, and the tapered convex part is adapted to the tapered concave groove.

[0013] The conical surface of the yin-yang pair is matched, which has a guiding effect during plugging and unplugging, can reduce the impact on the sealing surface during plugging and unplugging, and improve the service life. Meanwhile, in the on state, the head end sealing part and the male valve core keep the three-dimensional convex and concave surface contact positioning, improve the axial butt joint positioning reliability of the head end sealing part and the male valve core, prevent the head end sealing part and the male valve core from being offset in the axial direction, and make the spring always generate elastic force in the axial direction. Therefore, the head end sealing part, the male valve core, the spring and the sealing ring are all corrected, maintained and stabilized, which is beneficial to improve the sealing and leakage prevention performance.

[0014] As a preferred solution, the inner end of the female valve stem is fixed relative to the position of the female end shell.

[0015] As a preferred solution, the outer diameter of the female valve stem from the head end sealing part to the lateral through hole remains unchanged and is equal to the outer diameter of the male valve core.

[0016] As a preferred solution, the outer periphery of the inner end of the female valve stem extends with a mounting edge, and the mounting edge abuts against the stepped surface of the first accommodating cavity.

[0017] As a preferred solution, the female end shell includes a female end quick connection shell, a female end pipe connection shell, a sleeve shell and a female end second spring; the female end pipe connection shell is sleeved on the outer periphery of the inner end of the female end quick connection shell and is sealed and connected through the female end third sealing ring; the sleeve shell is sleeved on the outer periphery of the outer end of the female end quick connection shell and is subjected to the outer end of the female end quick connection shell, and the outer end of the female end second spring abuts against the sleeve shell, and the inner end of the female end second spring abuts against the female end pipe connection shell.

[0018] As a preferred solution, the female end pipe connection shell has a first connection section for connecting the first pipe, the outer diameter of the first connection section is smaller than the main body part of the female end pipe connection shell, a first sealing end surface is formed on the end surface of the main body part of the female end pipe connection shell, further, a fourth annular groove is recessed on the first sealing end surface, and a female end fourth sealing ring is installed in the fourth annular groove, and the female end fourth sealing ring slightly protrudes from the first sealing end surface. The female end second spring is arranged so that the female end fourth sealing ring can be sealed and abutted with the first pipe.

[0019] As a preferred solution, the sleeve shell has a covering shell extending towards the end where the female end pipe connection shell is located, the covering shell completely covers the female end second spring, and the covering shell is sleeved on the outer periphery of the female end pipe connection shell.

[0020] As a preferred solution, the male end shell includes a male end quick connection shell and a male end pipe connection shell, the male end pipe connection shell is sleeved on the inner end of the male end quick connection shell, and is sealed and connected through the male end second sealing ring.

[0021] As a preferred solution, the inner end of the male valve core is provided with a cross-shaped abutting portion, and the outer end of the male spring abuts against the cross-shaped abutting portion.

[0022] Compared with the prior art, the present application has obvious advantages and beneficial effects. Specifically, from the above technical solution, it can be known that the structure of the female connector and the male connector is innovatively designed, the sealing ring is positioned in multiple directions by means of a simple structure, the sealing ring can be prevented from falling off in the plugging process and after the connection, the no-dripping design is realized, the safety of the equipment and the user is ensured, the phenomenon that the working environment is polluted by fluid leakage when the circuit is connected / disconnected is avoided, meanwhile, the female valve rod has a head end sealing portion, an internal communication cavity and a lateral through hole, the unique internal structure design ensures the maximum flow / pressure drop ratio, ensures excellent flow, improves the impurity tolerance of the quick connector, and the simple female connector and the male connector have compact and light structures, which greatly reduces the volume and weight of the product.

[0023] In order to make the structure characteristics and effects of the present application clearer, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a perspective view of the female connector of the embodiment of the present application;

[0025] Figure 2 is a sectional view of the female connector of the embodiment of the present application;

[0026] Figure 3 is another sectional view of the female connector of the embodiment of the present application;

[0027] Figure 4 is a front view of the female valve rod of the female connector of the embodiment of the present application;

[0028] Figure 5 is a partial perspective view of the female valve rod of the female connector of the embodiment of the present application;

[0029] Figure 6 is a sectional view of the female valve rod of the female connector of the embodiment of the present application;

[0030] Figure 7 is a perspective view of the male connector of the embodiment of the present application;

[0031] Figure 8 is a sectional view of the male connector of the embodiment of the present application;

[0032] Figure 9 is a perspective view of the male valve core of the male connector of the embodiment of the present application;

[0033] Figure 10 is a sectional view of the male valve core of the male connector of an embodiment of the present application;

[0034] Figure 11 is an end view of the male valve core of the male connector of an embodiment of the present application;

[0035] Figure 12 is a perspective view of the male connector and the female connector in a state of being used in conjunction (i.e. in a conductive state) of an embodiment of the present application;

[0036] Figure 13 is a sectional view of the male connector and the female connector in a state of being used in conjunction (i.e. in a conductive state) of an embodiment of the present application;

[0037] Figure 14 is a sectional view of the female valve stem and the male valve core in a state of being used in conjunction (i.e. in a conductive state) of an embodiment of the present application.

[0038] Explanation of the reference numerals:

[0039] Female connector 100

[0040] Female housing 101 Female valve stem 102

[0041] Female annular valve sleeve 103 Female first sealing ring 104

[0042] Female second sealing ring 105 Female first spring 106

[0043] First accommodating cavity 107 First annular groove 108

[0044] Second annular groove 109 Head end sealing portion 110

[0045] Internal communication cavity 111 Lateral through hole 112

[0046] Tapered convex portion 113 Installation edge 114

[0047] Step surface 115 Female quick-connect housing 116

[0048] Female connector pipe housing 117 Covering housing 118

[0049] Female second spring 119 Female third sealing ring 120

[0050] First connecting section 121 First sealing end surface 122

[0051] Fourth annular groove 123 Female fourth sealing ring 124

[0052] Covering housing 125 First stop step 126

[0053] Second stop step 127 Third stop step 128

[0054] Male end connector 200

[0055] Male end connector 200

[0056] Male end connector 200

[0057] Plug-in section 205 Second accommodating cavity 206

[0058] Plug-in section 205 Second accommodating cavity 206

[0059] Plug-in section 205 Second accommodating cavity 206

[0060] Plug-in section 205 Second accommodating cavity 206

[0061] Plug-in section 205 Second accommodating cavity 206

[0062] Plug-in section 205 Second accommodating cavity 206 DETAILED DESCRIPTION

[0063] Please refer to Figures 1 to 14 Fig. 1, which shows the specific structure of the embodiment of the application.

[0064] In the description of the present application, it should be noted that for orientation words, such as terms "upper", "lower", "front", "back", "left", "right", "inner", "outer", etc. indicate the orientation and positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0065] A quick connector, comprising a female end connector 100 and a male end connector 200 which can be connected and conducted by plugging; the quick connector is mainly used as a liquid quick connector, and can also be used as a gas quick connector.

[0066] As Figures 1 to 6 shown, which shows the specific structure of the female end connector 100;

[0067] The female end connector 100 comprises a female end connector 100, a female end connector 100, a female end connector 100, a female end connector 100, a female end connector 100, and a female end connector 100;

[0068] The interior of the female end housing 101 has a first accommodating cavity 107 extending through both ends, the inner wall surface of the outer section area of the first accommodating cavity 107 is recessed with a first annular groove 108, the female end first sealing ring 104 is installed in the first annular groove 108; the inner annular wall surface of the annular valve sleeve 103 is recessed with a second annular groove 109, the female end second sealing ring 105 is installed in the second annular groove 109; the outer end of the female end first spring 106 acts on the inner end of the annular valve sleeve 103, the inner end of the female end first spring 106 acts on the female end housing 101; the female end valve stem 102 has a head end sealing portion 110, an internal communication cavity 111 and a lateral through hole 112, the lateral through hole 112 is provided with multiple, for example, 2 or more than 3, which is a long strip shape extending along the axial direction, multiple lateral through holes 112 are arranged at a circumferential interval, so that the flow is larger. The entire female end valve stem 102 is designed as an integral type light rod, which is not easy to form bonding impurities, if there are some impurities, the impurities will be hung off due to the liquid or gas flow of the internal communication cavity 111 and the lateral through hole 112, avoiding blockage, improving the impurity capacity of the quick connector, ensuring the flow. The inner end of the female end valve stem 102 is fixed relative to the position of the female end housing 101. Here, the outer periphery of the inner end of the female end valve stem 102 extends an installation edge 114, the installation edge 114 abuts on the stepped surface 115 of the first accommodating cavity 107. The outer diameter of the female end valve stem 102 from the head end sealing portion 110 to the position of the lateral through hole 112 remains unchanged, and is equal to the outer diameter of the male end valve core 202 described below. The inner end of the internal communication cavity 111 is communicated with the inner end of the first accommodating cavity 107, the lateral through hole 112 is located inside the head end sealing portion 110 and is communicated between the internal communication cavity 111 and the first accommodating cavity 107, the head end sealing portion 110 extends into the interior of the annular valve sleeve 103.

[0069] The female end shell 101 comprises a female end quick connection shell 116, a female end pipe connecting shell 117, a sleeve shell 118 and a female end second spring 119. The female end pipe connecting shell 117 is sleeved on the outer periphery of the inner end of the female end quick connection shell 116 and is sealed and connected by a female end third sealing ring 120. The sleeve shell 118 is sleeved on the outer periphery of the outer end of the female end quick connection shell 116 and is supported by the outer end of the female end quick connection shell 116. The outer end of the female end second spring 119 abuts against the sleeve shell 118 and the inner end of the female end second spring 119 abuts against the female end pipe connecting shell 117. The female end pipe connecting shell 117 has a first connecting section 121 for connecting the first pipe. The outer diameter of the first connecting section 121 is smaller than the main body of the female end pipe connecting shell 117. Therefore, a first sealing end face 122 is formed on the end face of the main body of the female end pipe connecting shell 117. Further, a fourth annular groove 123 is concavely arranged on the first sealing end face 122. A female end fourth sealing ring 124 is installed in the fourth annular groove 123. The female end fourth sealing ring 124 slightly protrudes from the first sealing end face 122. The female end second spring 119 is arranged to enable the female end fourth sealing ring 124 to be in sealing abutment with the first pipe. The sleeve shell 118 has a covering shell 125 extending towards the end where the female end pipe connecting shell 117 is located. The covering shell 125 completely covers the female end second spring 119 and is sleeved on the outer periphery of the female end pipe connecting shell 117. A first stop step 126 is arranged on the female end pipe connecting shell 117 to prevent the covering shell 125 from excessively displacing along the female end pipe connecting shell 117. A second stop step 127 extends on the outer periphery of the outer end of the female end quick connection shell 116. Correspondingly, a third stop step 128 is convexly arranged on the inner annular face of the outer end of the sleeve shell 118. Under the action of the female end second spring 119, the third stop step 128 abuts against the second stop step 127.

[0070] As shown in FIG. 2, which shows the specific structure of the male end connector 200; Figures 7 to 11

[0071] ​The male connector 200 comprises a male housing 201, a male valve core 202, a male spring 203 and a male first sealing ring 204. One end of the male housing 201 has a plug section 205. The interior of the male housing 201 has a second accommodating cavity 206 at both ends of the male housing 201, and the second accommodating cavity 206 penetrates through the interior of the plug section 205. The inner wall surface of the outer section area of the second accommodating cavity 206 is surrounded by a third annular groove 207, and the male first sealing ring 204 is installed in the third annular groove 207. The male valve core 202 is located in the outer section area of the second accommodating cavity 206. The outer end of the male spring 203 acts on the male valve core 202, and the inner end of the male spring 203 acts on the male housing 201. Here, the male housing 201 comprises a male quick-connect housing 209 and a male connector pipe housing 210. The male connector pipe housing 210 is sleeved on the inner end of the male quick-connect housing 209, and is sealed and connected by a male second sealing ring 211. Similarly, the male connector pipe housing 210 has a second connecting section 212 for connecting the second pipe. The outer diameter of the second connecting section 212 is smaller than that of the main body part of the male connector pipe housing 210. Therefore, a second sealing end face 213 is formed on the end face of the main body part of the male connector pipe housing 210. Further, a fifth annular groove can also be recessed on the second sealing end face 213, and a male third sealing ring is installed in the fifth annular groove. The male third sealing ring slightly protrudes from the second sealing end face 213. The inner end of the male valve core 202 is provided with a cross-shaped abutting part 214. The outer end of the male spring 203 abuts on the cross-shaped abutting part 214, and the inner end of the male spring 203 abuts on the male connector pipe housing 210.

[0072] Mainly combined with Figure 2 , Figure 8 and Figure 13 shown;

[0073] In the disconnected state: the outer peripheral side of the head end sealing part 110 of the female valve rod 102 and the annular valve sleeve 103 are in sealing contact through the female second sealing ring 105, the outer peripheral side of the annular valve sleeve 103 and the inner wall surface of the first accommodating cavity 107 of the female housing 101 are in sealing contact through the female first sealing ring 104, and the male valve core 202 of the male connector 200 and the inner wall surface of the second accommodating cavity 206 of the male housing 201 are in sealing contact through the male first sealing ring 204; to prevent liquid leakage in the disconnected state.

[0074] In the process of insertion: the plug section 205 of the male connector 200 extends into the first accommodating cavity 107 of the female connector 100, and pushes the annular valve sleeve 103 inward, so that the annular valve sleeve 103 is separated from the head end sealing portion 110 of the female valve stem 102, and the flow gap A is formed between the head end sealing portion 110 and the inner wall surface of the second accommodating cavity 206. Until the first accommodating cavity 107 is connected to the second accommodating cavity 206 through the internal communication cavity 111, the lateral through hole 112 and the flow gap A, in the process of insertion, the female second sealing ring 105 slides along the head end sealing portion 110 to the position of the lateral through hole 112 together with the annular valve sleeve 103, and the outer ring side and the inner ring side of the female second sealing ring 105 are always limited by the second annular groove 109 of the annular valve sleeve 103 and the outer circumferential surface of the female valve stem 102 respectively, so it is impossible to loosen and displace, and the female second sealing ring 105 cannot fall off in the process of insertion. At the same time, the male first sealing ring 204 slides along the male valve core 202 and the head end sealing portion 110 to the position of the lateral through hole 112 together with the plug section 205, so the outer ring side and the inner ring side of the male first sealing ring 204 are always limited, and it is impossible to loosen and displace, and the male first sealing ring 204 cannot fall off in the process of insertion, avoiding liquid leakage in the process of insertion.

[0075] In the on state, as shown in Figure 13 , the female housing 101 and the male housing 201 usually form a locking / solid / locking connection, the first accommodating cavity 107 is connected to the second accommodating cavity 206 through the internal communication cavity 111, the lateral through hole 112 and the flow gap A, the plug section 205 of the male connector 200 is in sealing connection with the female first sealing ring 104 of the female connector 100, which is equivalent to the sealing connection between the plug section 205 of the male connector 200 and the inner wall surface of the first accommodating cavity 107 of the female connector 100, preventing liquid leakage in the on state. In the process of conduction, the liquid or gas will have a scouring force on the male first sealing ring 204 and the female second sealing ring 105, but since the male first sealing ring 204 and the female second sealing ring 105 are limited in multiple directions, it is impossible to loosen and displace.

[0076] As shown in Figure 14As shown, the outer end of the head end sealing part 110 has an outward convex and gradually decreasing arranged conical convex part 113, the outer end of the male end valve core 202 has an inward concave and gradually increasing arranged conical groove 208, and the conical convex part 113 is adapted in the conical groove 208. The yin-yang pair of matching conical surfaces have a guiding effect during plugging and unplugging, which can reduce the impact on the sealing surface during plugging and unplugging, and improve the service life. At the same time, in the on state, the head end sealing part 110 and the male end valve core 202 are in three-dimensional convex-concave surface contact positioning, which improves the axial butt joint positioning reliability of the head end sealing part 110 and the male end valve core 202, prevents the head end sealing part 110 and the male end valve core 202 from being offset in the axial direction, and makes the spring always generate elastic force in the axial direction. Therefore, it has a correcting, maintaining and stabilizing effect on the head end sealing part 110, the male end valve core 202, the spring and the sealing ring, which is beneficial to improve the sealing and leakage prevention performance.

[0077] The design focus of the present application is that it mainly innovatively designs the structure of the female end connector 100 and the male end connector 200, forms multi-directional positioning of the sealing ring by means of simple structure, prevents the sealing ring from falling off in the plugging and unplugging process and after being turned on, realizes the drip-free design, ensures the safety of the equipment and the user, avoids the phenomenon of fluid leakage during the on / off of the loop to cause pollution to the working environment, at the same time, the female end valve rod 102 has the head end sealing part 110, the internal communication cavity 111 and the lateral through hole 112, the unique internal structure design ensures the maximum flow / pressure drop ratio, ensures excellent flow, improves the impurity capacity of the quick connector, and the simple female end connector 100 and the male end connector have compact and light structure, which greatly reduces the volume and weight of the product.

[0078] The above is only a preferred embodiment of the present application, and does not limit the technical scope of the present application, so any slight modification, equivalent change and modification of the above embodiment according to the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A quick connector, comprising a female connector (100) and a male connector (200) with pluggable connection conduction, characterized in that: the female connector (100) comprises a female housing (101), a female valve rod (102), a female annular valve sleeve (103), a female first sealing ring (104), a female second sealing ring (105), and a female first spring (106); the female housing (101) has a first accommodating cavity (107) penetrating through both ends in the inside, the inner wall surface of the outer section area of the first accommodating cavity (107) is recessed with a first annular groove (108), and the female first sealing ring (104) is installed in the first annular groove (108); the inner annular wall surface of the annular valve sleeve (103) is recessed with a second annular groove (109), and the female second sealing ring (105) is installed in the second annular groove (109); the outer end of the female first spring (106) acts on the inner end of the annular valve sleeve (103), and the inner end of the female first spring (106) acts on the female housing (101); the female valve rod (102) has a head end sealing part (110), an internal communication cavity (111), and a lateral through hole (112), the inner end of the internal communication cavity (111) is communicated with the inner end of the first accommodating cavity (107), the lateral through hole (112) is located on the inner side of the head end sealing part (110) and is communicated between the internal communication cavity (111) and the first accommodating cavity (107), and the head end sealing part (110) extends into the inside of the annular valve sleeve (103); the male connector (200) comprises a male housing (201), a male valve core (202), a male spring (203), and a male first sealing ring (204); one end of the male housing (201) has a plug section (205), the inside of the male housing (201) has a second accommodating cavity (206) at both ends of the male housing (201), and the second accommodating cavity (206) penetrates through the inside of the plug section (205); the inner wall surface of the outer section area of the second accommodating cavity (206) is recessed with a third annular groove (207), the male first sealing ring (204) is installed in the third annular groove (207), the male valve core (202) is located in the outer section area of the second accommodating cavity (206), the outer end of the male spring (203) acts on the male valve core (202), and the inner end of the male spring (203) acts on the male housing (201).

2. A quick coupling according to claim 1, characterized in that: the outer end of the head end sealing part (110) has a tapered convex part (113) which is outward convex and gradually smaller, the outer end of the male valve core (202) has a tapered recess (208) which is inward recessed and gradually larger, and the tapered convex part (113) is adapted in the tapered recess (208).

3. A quick coupling according to claim 1, characterized in that: the inner end of the female valve rod (102) is fixed in position relative to the female housing (101).

4. A quick coupling according to claim 1, characterized in that: the outer diameter of the female valve rod (102) from the head end sealing part (110) to the part where the lateral through hole (112) is located remains unchanged and is equal to the outer diameter of the male valve core (202).

5. A quick connector according to claim 1, wherein: The outer periphery of the inner end of the female valve stem (102) extends with a mounting edge (114) which abuts against the step face (115) of the first accommodating cavity (107).

6. A quick connector according to claim 1, wherein: The female end shell (101) comprises a female end quick connection shell (116), a female end pipe connecting shell (117), a sleeve shell (118) and a female end second spring (119); the female end pipe connecting shell (117) is sleeved at the outer periphery of the inner end of the female end quick connection shell (116) and is sealed and connected through a female end third sealing ring (120); the sleeve shell (118) is sleeved at the outer periphery of the outer end of the female end quick connection shell (116) and is abutted by the outer end of the female end quick connection shell (116), and the outer end of the female end second spring (119) is abutted against the sleeve shell (118) and the inner end of the female end second spring (119) is abutted against the female end pipe connecting shell (117).

7. A quick coupling according to claim 6, characterized in that: The female end pipe connecting shell (117) has a first connecting section (121) for connecting the first pipe, the outer diameter of the first connecting section (121) is smaller than the main body part of the female end pipe connecting shell (117), a first sealing end face (122) is formed at the end face of the main body part of the female end pipe connecting shell (117), a fourth annular groove (123) is concavely arranged on the first sealing end face (122), a female end fourth sealing ring (124) is installed in the fourth annular groove (123), and the female end fourth sealing ring (124) slightly protrudes from the first sealing end face (122).

8. A quick coupling according to claim 6, characterized in that: The sleeve shell (118) has a covering shell (125) extending towards the end where the female end pipe connecting shell (117) is located, the covering shell (125) completely covers the female end second spring (119), and the covering shell (125) is sleeved at the outer periphery of the female end pipe connecting shell (117).

9. The quick connector of claim 1, wherein: The male end shell (201) comprises a male end quick connection shell (209) and a male end pipe connecting shell (210), the male end pipe connecting shell (210) is sleeved at the inner end of the male end quick connection shell (209) and is sealed and connected through a male end second sealing ring (211).

10. The quick connector of claim 1, wherein: The inner end of the male end valve core (202) is provided with a cross-shaped abutting part (214), and the outer end of the male end spring (203) is abutted against the cross-shaped abutting part (214).

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