A self-locking quick connector

Abstract

The application provides a self-locking quick connector, which comprises a first valve body assembly and a second valve body assembly, a first valve core assembly is arranged in the first valve body assembly, a second valve core assembly is arranged in the second valve body assembly, and the first valve body assembly and the second valve body assembly are locked through a locking mechanism; the first valve body assembly comprises a first blocking ring, a first chamber and a second chamber, and the first chamber and the second chamber are respectively arranged on the two sides of the first blocking ring; the first valve core assembly comprises a first guide part and a first sealing part, the first guide part is connected with the first sealing part, a first fluid passage is arranged on the first guide part, a part of the outer wall surface of the first guide part is attached to the inner wall surface of the first chamber, the outer diameter of the first sealing part is smaller than the inner diameter of the first chamber, and the first sealing part is used for blocking the first blocking ring. The axial displacement of the first valve core assembly is relatively stable; the first fluid passage is arranged on the first guide part, the first valve body assembly does not need to be set to be too large, the quick connector is compact in structure and small in size.

Description

Technical Field

[0001] This application relates to the field of quick-connect coupling technology, specifically to a self-locking quick-connect coupling. Background Technology

[0002] During welding, welding equipment requires the introduction of shielding gas to assist welding and cooling liquid to cool. Therefore, some welding equipment is equipped with gas supply system and water cooling system. However, both gas supply system and water cooling system require external gas supply and water supply. Quick-connect couplings are used to connect the gas supply system to the gas supply and the water cooling system to the water supply.

[0003] In the existing self-locking quick-connect coupling, there are male valve bodies and female valve bodies. Each of the male and female valve bodies is provided with a valve core. The valve core is used to block one of the ports of the male and female valve bodies. The other end of the male and female valve bodies away from the blocking end is connected to the corresponding pipe. When the male and female valve bodies are connected, the two valve cores are subjected to mutual force and move away from the blocking point to realize the connection between the male and female valve bodies.

[0004] However, in this type of self-locking quick-connect coupling, fluid can only flow between the outer side of the valve core and the inner wall of the valve body, and then flow into another valve body through the sealed and unlocked port. In this structure, it is necessary to ensure that there is a sufficient gap between the outer wall of the valve core and the inner wall of the valve body for fluid flow. Therefore, the valve body volume is large. Furthermore, since the outer wall of the valve core does not contact the inner wall of the valve body, the axial displacement of the valve core lacks radial restraint, resulting in unstable displacement of the valve core, which in turn makes the quick-connect coupling unstable in its operating state.

[0005] Therefore, there is room for further improvement in the existing self-locking quick-connect couplings. Utility Model Content

[0006] In view of this, and in response to the technical problems of large valve body volume and unstable valve core displacement in the prior art self-locking quick connector, this application provides a self-locking quick connector in which part of the outer wall surface of the valve core fits against the inner wall surface of the valve body, and a fluid channel is provided inside the valve core, through which fluid can flow, thereby reducing the installation volume of the valve body, and the axial displacement of the valve core is relatively stable, and the self-locking quick connector is in a relatively stable state of use.

[0007] This application provides a self-locking quick-connect connector, comprising: The first valve body assembly includes a first sealing ring, a first chamber, and a second chamber, with the first chamber and the second chamber located on both sides of the first sealing ring, respectively. The first valve core assembly is at least partially located within the first sealing ring and is used for axial displacement to change the communication state between the first chamber and the second chamber. The second valve body assembly is slidably disposed in the second chamber and is used to apply a force away from the first sealing ring to the first valve core assembly; it includes a second sealing ring, a second valve core assembly and a third chamber; the second valve core assembly is disposed in the third chamber and at least partially passes through the second sealing ring, and is used to move axially to change the communication state between the second sealing ring and the third chamber; A locking mechanism for locking the first valve body assembly to the second valve body assembly; The first valve core assembly includes a first guide portion and a first sealing portion. The first guide portion is connected to the first sealing portion. The first guide portion is provided with a first fluid channel. Part of the outer wall surface of the first guide portion is in contact with the inner wall surface of the first chamber. The outer diameter of the first sealing portion is smaller than the inner diameter of the first chamber. The first sealing portion is used to seal the first sealing ring.

[0008] Compared with the prior art, the self-locking quick-connect coupling of this application is provided with two valve body assemblies, each of which contains a valve core assembly. Each valve core assembly can seal the end of the corresponding valve body assembly, thereby achieving a self-locking function. When the two valve body assemblies are not connected, the quick-connect coupling is not connected under the action of the corresponding valve core assembly; when the two valve body assemblies are connected, the two valve core assemblies push each other away from the corresponding sealing port, thereby connecting the two valve body assemblies. The first valve core assembly includes a first guide portion and a first sealing portion. The first guide portion is located in the first chamber. The outer wall of the first valve core assembly fits against the inner wall of the first chamber, so that when the first valve core assembly moves axially, the first chamber can exert a certain radial force on the first guide part, making the axial displacement of the first valve core assembly relatively stable, so as to ensure the stability of the quick-connect fitting. In addition, the outer diameter of the first sealing part is smaller than the inner diameter of the first chamber, and a first fluid channel is provided on the first guide part, so that the fluid can flow directly to the first sealing ring through the first fluid channel. It is not necessary to make the first valve body assembly too large, reducing the size of the first valve body assembly, making the quick-connect fitting structure compact and the overall size small.

[0009] Preferably, the first valve core assembly further includes: The first valve core is located in the first chamber and is at least partially located within the first sealing ring; The first cannula is located at the end of the first chamber furthest from the first sealing ring; A first spring is located between the first insertion tube and the first valve core, and is used to apply a force toward the first sealing ring to the first valve core; The first guide part, the first sealing part, and the first fluid passage are located on the first valve core.

[0010] Preferably, the first fluid channel includes: The first channel is arranged axially and opens at the end of the first guide portion away from the first sealing portion; The second channel is connected to the first channel, and the end away from the first channel opens on the radial outer wall of the first valve core. The axis of the second channel is inclined to the axis of the first channel or perpendicular to the axis of the first channel; There is a distance between the outer side of the opening end of the second channel and the inner wall of the first chamber.

[0011] Preferably, the first valve core further includes: The first limiting ring is located between the first sealing part and the first guide part, and its outer diameter is larger than the inner diameter of the first sealing ring and smaller than the inner diameter of the first cavity. The first sealing groove is disposed between the first limiting ring and the first sealing part; The first sealing ring is disposed in the first sealing groove, and its outer diameter is larger than the inner diameter of the first sealing ring. The first pushing part is located at the end of the first sealing part away from the first sealing groove, and its outer diameter is smaller than the outer diameter of the first sealing part. In particular, the radial length of the first push portion gradually decreases along the axial direction away from the first sealing portion.

[0012] Preferably, the second valve core assembly includes: The second valve core is located in the third chamber and is at least partially located within the second sealing ring; The second cannula is located at the end of the third chamber furthest from the second sealing ring; The second spring is located between the second insertion tube and the second valve core, and is used to apply a force toward the second sealing ring to the second valve core.

[0013] Preferably, the second valve core includes: The second guide section is located in the third chamber, and part of its outer wall surface is in contact with the inner wall surface of the third chamber. The second fluid channel is provided on the second guide portion, with one end opening at the axial end of the second guide portion away from the second sealing ring, and the other end opening on the radial outer wall of the second guide portion; The second sealing part is located at one end of the second guide part near the second sealing ring, and its outer diameter is smaller than the inner diameter of the third chamber, and it is used to seal the second sealing ring. The second limiting ring is located between the second sealing part and the second guide part, and its outer diameter is larger than the inner diameter of the second sealing ring and smaller than the inner diameter of the third chamber. The second sealing groove is located between the second limiting ring and the second sealing part; The second sealing ring is located in the second sealing groove, and its outer diameter is larger than the inner diameter of the second sealing ring. The second pusher is located at the end of the second sealing part away from the second sealing groove, and its outer diameter is smaller than the outer diameter of the second sealing part. In particular, the radial length of the second push portion gradually decreases along the axial direction away from the second seal.

[0014] Preferably, the second fluid channel includes: The third channel is arranged axially and opens at the end of the second guide portion away from the second sealing portion; The fourth channel is connected to the third channel, and the end furthest from the third channel opens on the radial outer wall of the second valve core; The axis of the fourth channel is inclined to the axis of the third channel or perpendicular to the axis of the third channel; There is a distance between the outer side of the opening end of the fourth channel and the inner wall of the third chamber.

[0015] Preferably, the second valve body assembly includes: The second valve sleeve, whose outer diameter is less than or equal to the inner diameter of the second chamber, is used to install the second valve core assembly; The third sealing groove, at least one, is located outside the second valve sleeve; The third sealing ring is located in the third sealing groove, and its outer diameter is larger than the inner diameter of the second cavity.

[0016] Preferably, the first valve sleeve includes a first sealing ring, a first chamber, a second chamber, and a fourth chamber; The fourth chamber has a larger inner diameter than the second chamber. The fourth chamber is located at the end of the second chamber that is far from the first chamber. The second valve sleeve is slidably located in the second chamber and the fourth chamber.

[0017] Preferably, the locking mechanism includes: A mounting hole is provided on the first valve sleeve and penetrates the first valve sleeve radially. Steel balls are placed inside the mounting holes; A locking groove is located on the outer upper part of the second valve sleeve to accommodate part of the steel ball; The third spring is sleeved outside the first valve sleeve; The sleeve includes a first cylindrical part and a second cylindrical part, the inner diameter of the first cylindrical part is larger than the inner diameter of the second cylindrical part, and the first cylindrical part is sleeved on the outside of the third spring; The first valve sleeve is provided with a limiting step, and the two ends of the third spring act with the limiting step and the side end of the second cylinder, respectively. When the third spring is in its natural state, the second cylinder is located outside the mounting hole. Wherein, the diameter of the steel ball is D, the radial depth of the mounting hole is D1, the radial depth of the locking groove is D2, D>D1, D>D2, and (D1+D2)≥D. Attached Figure Description

[0018] Figure 1 This is a cross-sectional structural schematic diagram of a self-locking quick-connect connector provided in an embodiment of this application; Figure 2 This is a partial cross-sectional structural schematic diagram of a self-locking quick connector provided in an embodiment of this application; Figure 3 yes Figure 1 A magnified view of part A; Figure 4 This is a cross-sectional structural schematic diagram of the first valve core provided in an embodiment of this application.

[0019] Reference numerals: 1. First valve body assembly; 2. Second valve body assembly; 3. Locking mechanism; 11. First valve sleeve; 12. First valve core; 13. First insertion tube; 14. First spring; 15. First sealing ring; 16. Fourth sealing ring; 111. First sealing ring; 112. First chamber; 113. Second chamber; 114. Fourth chamber; 115. Mounting hole; 116. Limiting step; 121. First guide portion; 122. First sealing portion; 123. First sealing groove; 124. First limiting ring; 125. First fluid channel; 126. First pushing portion; 1251, First Channel; 1252, Second Channel; 21. Second valve sleeve; 22. Second sealing ring; 23. Second valve core; 24. Second spring; 25. Second insertion tube; 26. Second sealing ring; 211. Third chamber; 212. Lock groove; 213. Third sealing groove; 214. Third sealing ring; 31. Steel ball; 32. Sleeve; 33. Third spring. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0021] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0022] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0023] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 4 illustrate.

[0024] This application provides a self-locking quick-connect coupling (hereinafter referred to as quick-connect coupling), which includes a first valve body assembly 1 and a second valve body assembly 2. The first valve body assembly 1 can be connected to the second valve body assembly 2. The end of the first valve body assembly 1 away from the second valve body assembly 2 is used to connect to a power supply device, and the end of the second valve body assembly 2 away from the first valve body assembly 1 is used to connect to a power consumption device. After the first valve body assembly 1 and the second valve body assembly 2 are connected, fluid transportation can be realized.

[0025] like Figure 1 , Figure 2 As shown, a first valve core assembly is provided inside the first valve body assembly 1. A first sealing ring 111 is provided at the end where the first valve body assembly 1 connects to the second valve body assembly 2. The first valve core assembly can seal the first sealing ring 111 in its natural state so that the fluid in the first valve body assembly 1 will not flow out. The first valve core assembly is used to move axially to change the communication state between the first chamber 112 and the second chamber 113. The first sealing ring 111 has the first chamber 112 and the second chamber 113 on its two axial sides, respectively. The first valve core assembly is located in the first chamber 112. When the first valve core assembly closes the first valve body assembly 1, part of the first valve core assembly passes through the first sealing ring 111 and is located in the second chamber 113. The outer wall surface of the first valve core assembly is in contact with the inner wall surface of the first sealing ring 111, thereby closing the first valve body assembly 1. Correspondingly, the second valve body assembly 2 is provided with a second valve core assembly. The end of the second valve body assembly 2 connected to the first valve body assembly 1 is provided with a second sealing ring 22. In its natural state, the second valve core assembly can seal the second sealing ring 22 so that the fluid in the second valve body assembly 2 will not flow out. That is, the second valve core assembly is used to move axially to change the communication state between the second sealing ring 22 and the third chamber 211. The second valve body assembly 2 is provided with a third chamber 211. The second valve core assembly is partially located in the third chamber 211. When the second valve core assembly closes the second valve body assembly 2, part of the second valve core assembly passes through the second sealing ring 22 and is located outside the third chamber 211. The outer wall surface of the second valve core assembly is in contact with the inner wall surface of the second sealing ring 22, thereby closing the second valve body assembly 2. Therefore, the pipes connected to the first valve body assembly 1 and the second valve body assembly 2 respectively have a self-locking function, which can prevent the fluid from leaking from the first valve body assembly 1 and the second valve body assembly 2 respectively; the quick-connect fitting is also provided with a locking mechanism 3, which is used to lock the first valve sleeve 11 assembly and the second valve sleeve 21 assembly relative to each other, so that the second valve core assembly can stably apply force to the first valve core assembly, ensuring the conduction stability of the quick-connect fitting, and thus ensuring the stable delivery of fluid; when the first valve body assembly 1 and the second valve body assembly 2 are connected, the self-locking of the first valve body assembly 1 and the second valve body assembly 2 is released, the quick-connect fitting is connected, and the fluid can be transmitted.

[0026] Furthermore, such as Figures 1 to 4 As shown, the first valve core assembly includes a first valve core 12, a first spring 14, and a first insertion tube 13. The first valve body assembly 1 includes a first valve sleeve 11, which is a through-tube structure. A first sealing ring 111 is disposed inside the first valve sleeve 11. The first sealing ring 111 is annular in shape and is integrally formed with the tube body of the first valve sleeve 11, both being made of metal. The outer side of the first sealing ring 111 is connected to the inner side of the tube body of the first valve sleeve 11. The first sealing ring 111 is coaxially arranged with the first valve sleeve 11. The first chamber 112 and the second chamber 113 are located on the two axial sides of the first sealing ring 111. The first insertion tube 13 is inserted into the end of the first chamber 112. The first insertion tube 13 and the first valve sleeve 11 are relatively fixedly connected by interference fit, welding or thread. The first valve core 12 is located in the first chamber 112. The first valve core 12 is at least partially located in the first sealing ring 111. The first valve core 12 and the first sealing ring 111 are slidably connected. The first spring 14 is disposed in the first chamber 112. The two ends of the first spring 14 are respectively attached to the first insertion tube 13 and the first valve core 12. In the natural state, the first spring 14 can apply a force parallel to the axial direction to the first valve core 12 and the first insertion tube 13, so that the first valve core 12 has a tendency to move towards the second chamber 113, so that the first valve core 12 passes through the first sealing ring 111. When the outer wall surface of the first valve core 12 is attached to the inner wall surface of the first sealing ring 111, the communication between the first chamber 112 and the second chamber 113 is disconnected. In this embodiment, the first valve core 12 includes a first guide portion 121 and a first sealing portion 122. The first guide portion 121 is connected to the first sealing portion 122, and the first sealing portion 122 and the first guide portion 121 are axially distributed. The first sealing portion 122 is located on the side near the first sealing ring 111. At least a portion of the outer wall surface of the first guide portion 121 is in contact with the inner wall surface of the first chamber 112. The first guide portion 121 is located inside the first chamber 112, and the outer wall surface of the first guide portion 121 is in contact with the inner wall surface of the first chamber 112. This allows the first chamber 112 to exert a certain radial limiting force on the first guide portion 121 when the first valve core assembly is axially displaced, making the axial displacement of the first valve core assembly relatively stable, thereby ensuring the smooth operation of the quick-connect connector. For stability; and, a first fluid channel 125 is provided on the first guide portion 121, so that the fluid can flow directly through the first fluid channel 125 to the first sealing ring 111, so that no additional gap is required between the first guide portion 121 and the first valve sleeve 11 for fluid flow, which can reduce the size of the first valve sleeve 11, making the quick-connect connector structure compact and the overall size small; in addition, the outer diameter of the first sealing portion 122 is smaller than the inner diameter of the first chamber 112, and the outer diameter of the first sealing portion 122 is equal to the inner diameter of the first sealing ring 111. When the first valve core 12 moves toward the second chamber 113, the outer wall surface of the first sealing portion 122 can fit with the inner wall surface of the first sealing ring 111, thereby achieving the sealing of the first sealing ring 111.

[0027] Furthermore, such as Figures 2 to 4As shown, the first fluid channel 125 includes a first channel 1251 and a second channel 1252. The first channel 1251 and the second channel 1252 are connected. The first channel 1251 is arranged axially. The first channel 1251 opens at the end of the first guide portion 121 away from the first sealing portion 122. The second channel 1252 opens at one end away from the first channel 1251 on the radially outer sidewall of the first valve core 12. There is a distance between the outer side of the opening end of the second channel 1252 and the inner sidewall of the first chamber 112. The outer diameter of the first sealing portion 122 is smaller than that of the first chamber 112, so that fluid can flow from the gap between the first sealing portion 122 and the first chamber 112, and then flow into or out of the second channel 1252 from the gap between the first chamber 112 and the second channel 1252. This can ensure the stable guiding effect of the axial displacement of the first guide portion 121, realize the flow of liquid, and at the same time ensure that the first valve sleeve 11 assembly has a small size.

[0028] In this embodiment, as Figure 2 As shown, the axis of the second channel 1252 is inclined to the axis of the first channel 1251, and the second channel 1252 is inclined toward the first sealing ring 111, so that the second channel 1252 has a certain guiding effect on the fluid and reduces the resistance to liquid flow.

[0029] In another alternative embodiment, such as Figure 4 As shown, the second channel 1252 is perpendicular to the axis of the first channel 1251, which reduces the structural difficulty of the first valve core 12 and reduces the manufacturing cost.

[0030] Furthermore, such as Figures 2 to 4 As shown, the first valve core 12 also includes a first limiting ring 124, a first sealing groove 123, a first sealing ring 15, and a first pushing part 126: the first limiting ring 124 is located between the first sealing part 122 and the first guide part 121, and its outer diameter is larger than the inner diameter of the first sealing ring 111 and smaller than the first chamber 112; the first sealing groove 123 is located between the first limiting ring 124 and the first sealing part 122, and the first sealing groove 123 is set close to the first limiting ring 124; the first sealing groove 123 is used to install the first sealing ring 15; the outer diameter of the first sealing ring 15 is larger than the inner diameter of the first sealing ring, and the outer diameter of the first limiting ring 124 is larger than the outer diameter of the first sealing ring 15; since the first sealing ring 15 is located between the first sealing ring 111 and the first limiting ring 124, as... Figure 1 As shown, when the first valve core 12 seals the first sealing ring 111, the first limiting ring 124 can provide better axial support force for the first sealing ring 15, ensuring the installation stability of the first sealing ring 15, and thus ensuring the sealing between the first sealing ring 15 and the first sealing ring 111. like Figures 2 to 4As shown, the first pushing part 126 is located at the end of the first sealing part 122 away from the first sealing groove 123. The outer diameter of the first pushing part 126 is smaller than the outer diameter of the first sealing part 122, that is, the first pushing part 126 can pass through the first sealing ring 111 and act with the second valve core assembly. In the axial direction away from the first sealing part 122, the radial length of the first pushing part 126 gradually decreases, thereby reducing the installation volume of the first pushing part 126. Moreover, the inclined outer wall surface of the first pushing part 126 can have a certain guiding effect on the fluid, ensuring the smooth flow of the fluid.

[0031] Furthermore, such as Figure 4 As shown, the outer wall of the first push part 126 is a concave arc-shaped structure, so that the cross-sectional profile of the first push part 126 is a figure-eight structure, which can reduce the resistance to the fluid and further increase the guiding effect of the fluid.

[0032] Based on any of the above embodiments, the second valve core assembly will be further described; in the embodiments, such as Figures 1 to 3 As shown, the first valve core assembly and the second valve core assembly have the same structure. The second valve core assembly includes a second valve core 23, a second spring 24, and a second insertion tube 25. The second valve core 23 is located in the third chamber 211, at least partially within the second sealing ring 22. The second insertion tube 25 is located at one end of the third chamber 211 away from the second sealing ring 22. The second spring 24 is located between the second insertion tube 25 and the second valve core 23, and is used to apply a force to the second valve core 23 toward the second sealing ring 22. The second valve core 23 includes a second guide portion, a second fluid channel, a second sealing portion, a second limiting ring, a second pushing portion, a second sealing groove, and a second sealing ring 26. The second guide portion is located in the third chamber 211, and its outer wall surface is in contact with the inner wall surface of the third chamber 211. The second fluid channel is located on the second guide portion, and one end of it is located away from the second sealing ring 22. The axial end of valve 2 is open, and the other end is open on the radial outer wall of the second guide portion; the second sealing portion is located at one end of the second guide portion near the second sealing ring 22, and its outer diameter is smaller than the inner diameter of the third chamber 211, for sealing the second sealing ring 22; the second limiting ring is located between the second sealing portion and the second guide portion, and its outer diameter is larger than the inner diameter of the second sealing ring 22 and smaller than the third chamber 211; the second sealing groove is located between the second limiting ring and the second sealing portion; the second sealing ring 26 is located in the second sealing groove, and its outer diameter is larger than the inner diameter of the second sealing ring; the second pushing portion is located at one end of the second sealing portion away from the second sealing groove, and its outer diameter is smaller than the outer diameter of the second sealing portion; wherein, along the axial direction away from the second sealing portion, the radial length of the second pushing portion gradually decreases; the other specific working principles and specific structures are the same as those of the first valve core assembly, and will not be described in detail here.

[0033] The second fluid channel includes a third channel and a fourth channel. The third channel is axially arranged and opens at the end of the second guide portion away from the second sealing portion. The fourth channel communicates with the third channel, and the end of the fourth channel away from the third channel opens on the radially outer sidewall of the second valve core 23. There is a distance between the outer sidewall of the opening end of the fourth channel and the inner sidewall of the third chamber 211. In an optional embodiment, the axis of the fourth channel is inclined to the axis of the third channel. In this embodiment, the first valve core 12 and the second valve core 23 have the same structure and the same operating principle, and the details and principles will not be described again here.

[0034] In another alternative embodiment, the axis of the fourth channel is perpendicular to the axis of the third channel, which reduces the structural complexity of the second valve core 23 and lowers manufacturing costs.

[0035] like Figure 1 , Figure 2 The second valve body assembly 2 includes a second valve sleeve 21, a second sealing ring 22, and a third cavity disposed on the second valve sleeve 21. The second sealing ring 22 is located at the end of the second valve sleeve 21, and the third cavity is located in the inner cavity of the second valve sleeve 21. One end of the third cavity communicates with the outside through the second sealing ring 22. The outer diameter of the second valve sleeve 21 is less than or equal to the inner diameter of the second chamber 113, and the second valve sleeve 21 can be slidably inserted into the second chamber 113. The second valve core 23, the second spring 24, and the second insertion tube 25 are disposed inside the second valve sleeve 21. The second valve sleeve 21 is used to install the second valve core assembly. The second insertion tube 25 is inserted into the third chamber 211. At the end away from the second sealing ring 22, the second insertion tube 25 and the second valve sleeve 21 are relatively fixedly connected by interference fit, welding or threading; wherein, the second valve sleeve 21 is provided with at least one third sealing groove 213, the third sealing groove 213 is located on the outside of the second valve sleeve 21, the third sealing groove 213 is used to install the third sealing ring 214, the outer diameter of the third sealing ring 214 is larger than the inner diameter of the second chamber 113, and the third sealing ring 214 can achieve sealing at the gap between the second valve sleeve 21 and the first valve sleeve 11, preventing fluid from leaking from the gap between the outside of the second valve sleeve 21 and the inner wall of the first valve sleeve 11.

[0036] Preferably, in this application, there are two third sealing grooves 213, which are spaced apart.

[0037] Furthermore, the locking mechanism 3 is described in detail; as shown in 3, the first valve sleeve 11 is also provided with a fourth chamber 114. The first chamber 112, the first sealing ring 111, the second chamber 113, and the fourth chamber 114 are arranged sequentially along the axial direction. The inner diameter of the fourth chamber 114 is larger than the inner diameter of the second chamber 113. The fourth chamber 114 is located at the end of the second chamber 113 away from the first chamber 112. The second valve sleeve 21 is slidably disposed in the second chamber 113 and the fourth chamber 114.

[0038] Wherein, the locking mechanism 3 includes a steel ball 31, a sleeve 32 and a third spring 33, as Figure 2 , Figure 4 shown in the figure, the first valve sleeve 11 is provided with a mounting hole 115, the mounting hole 115 is located at the position of the first valve sleeve 11 where the fourth chamber 114 is located, the mounting hole 115 radially penetrates the first valve sleeve 11, the steel ball 31 is arranged in the mounting hole 115, the diameter of the steel ball 31 is D, the radial depth of the mounting hole 115 is D1, and D>D1, so that in a natural state, at least part of the steel ball 31 is located in the fourth chamber 114; correspondingly, the second valve sleeve 21 is provided with a locking groove 212, the locking groove 212 is of a semicircular groove structure, a V-shaped groove structure or an inverted trapezoidal groove structure, the locking groove 212 is configured to accommodate part of the steel ball 31, the radial depth of the locking groove 212 is D2, D>D2, and (D1+D2)≥D, so that the steel ball 31 can be simultaneously positioned in the mounting hole 115 and the locking groove 212, to axially limit the position of the second valve sleeve 21 relative to the first valve sleeve 11, so that the second valve sleeve 21 has a stable position in the axial direction and is not easy to shake, which ensures the stability of the action of the second valve core 23 on the first valve core 12, so that the quick-plug connector can maintain communication.

[0039] as Figure 2 shown in the figure, the third spring 33 is sleeved on the first valve sleeve 11; the sleeve 32 is provided with a first cylinder part, a second cylinder part and a third cylinder part, the first cylinder part, the second cylinder part and the third cylinder part are sequentially arranged in an axial direction away from the first chamber 112, the inner diameter of the first cylinder part is larger than that of the second cylinder part, and the first cylinder part is sleeved outside the third spring 33; a limiting step 116 is provided outside the first valve sleeve 11, the third spring 33 is fixedly connected with the limiting step 116, and two ends of the third spring 33 respectively act on the limiting step 116 and a side end of the second cylinder part, to generate an axial acting force on the sleeve 32, so that the sleeve 32 has a displacement trend towards a direction away from the first chamber 112; in this embodiment, when the third spring 33 is in a natural state, the second cylinder part is located outside the mounting hole 115, and the inner diameter of the second cylinder part is slightly larger than or equal to the outer diameter of the first valve sleeve 11, so as to generate a radial limiting effect on the steel ball 31, so that the steel ball 31 can be limited in the mounting hole 115.

[0040] Wherein, the inner diameter of the third cylinder part is larger than that of the second cylinder part, the radial distance between the inner side wall of the third cylinder part and the outer side wall of the first valve sleeve 11 is D3, D3<D, (D3+D1)≥D, so that when the third cylinder part is located outside the mounting hole 115, the steel ball 31 can protrude out of the mounting hole 115, exit from the locking groove 212 at the same time, and at least part of the steel ball 31 is still located in the mounting hole 115, so that the locking mechanism 3 unlocks the second valve sleeve 21 and the first valve sleeve 11, allowing the second valve sleeve 21 to脱出 the first valve sleeve 11. When the third spring 33 is in a compressed state, the third cylinder part is located outside the mounting hole 115.

[0041] In addition, such as Figure 1 , Figure 2 , Figure 4 As shown, the first valve sleeve 11 is provided with a fourth sealing groove. The fourth sealing groove is located on the side of the mounting hole 115 away from the first chamber 112. The fourth sealing groove is located at the third cylindrical part. The fourth sealing groove is used to install the fourth sealing ring 16. The outer diameter of the fourth sealing ring 16 is larger than the inner diameter of the second cylindrical part and smaller than the inner diameter of the third cylindrical part. The fourth sealing ring 16 is used to achieve a seal between the sleeve 32 and the first valve sleeve 11, preventing external impurities from entering the mounting hole 115 and clogging the steel ball 31.

[0042] In this application, the first spring 14, the second spring 24, and the third spring 33 are all cylindrical springs; however, the first spring 14 and the second spring 24 can also be conical cylindrical springs, disc springs, etc.

[0043] In practical use, the first insertion tube 13 and the second insertion tube 25 are respectively connected to the corresponding equipment pipelines, and both the first valve body assembly 1 and the second valve body assembly 2 are under the action of the third spring 33, with the steel ball 31 at least partially located in the fourth chamber 114; the second valve sleeve 21 is inserted into the fourth chamber 114 and the second chamber 113 of the first valve sleeve 11 in sequence. The operator pinches the sleeve 32 and applies a force to the sleeve 32 towards the direction of the first valve core assembly, causing the steel ball 31 to exit from the fourth chamber 114 and at least partially located between the third cylinder and the first valve sleeve 11; then the second valve sleeve 21 is inserted to the bottom, and the first valve core 12 and the second valve core 23 collide. The second valve core 23 pushes the first valve core 12 backward into the first chamber 112, and under the force of the first valve core 12, the second valve core 23 backward into the third chamber 211. When the two forces are balanced, such as Figure 2 As shown, the contact surfaces of the first valve core 12 and the second valve core 23 are exactly in the middle of the first sealing ring 111 and the second sealing ring 22. The first valve body assembly 1 and the second valve body assembly 2 are connected and conductive. At this time, the force on the sleeve 32 is released, and the steel ball 31 bounces back radially inward and falls into the locking groove 212 to achieve the locking of the second valve sleeve 21 and the first valve sleeve 11.

[0044] When it is necessary to pull the second valve sleeve 21 out of the first valve sleeve 11, repeat the above steps for acting on the sleeve 32. It is only necessary to pull the second valve sleeve 21 out of the first valve sleeve 11. When the first valve core 12 and the second valve core 23 do not collide, the first valve core 12 and the second valve core 23 spring back to reset, and the first valve body assembly 1 and the second valve body assembly 2 are sealed again.

[0045] It should be noted that the various embodiments of this application can be arbitrarily combined into new embodiments, provided that the solutions do not conflict and the technical solutions can coexist.

[0046] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A self-locking quick-connect connector, characterized in that, include: The first valve body assembly (1) includes a first sealing ring (111), a first chamber (112), and a second chamber (113), with the first chamber (112) and the second chamber (113) located on both sides of the first sealing ring (111); The first valve core assembly is at least partially located within the first sealing ring (111) and is used for axial displacement to change the communication state between the first chamber (112) and the second chamber (113); The second valve body assembly (2) is slidably disposed in the second chamber (113) and is used to apply a force away from the first sealing ring (111) to the first valve core assembly; It includes a second sealing ring (22), a second valve core assembly and a third chamber (211); the second valve core assembly is disposed in the third chamber (211) and at least partially passes through the second sealing ring (22) for axial displacement to change the communication state between the second sealing ring (22) and the third chamber (211); Locking mechanism (3) for locking the first valve body assembly (1) and the second valve body assembly (2); The first valve core assembly includes a first guide portion (121) and a first sealing portion (122). The first guide portion (121) is connected to the first sealing portion (122). The first guide portion (121) is provided with a first fluid channel (125). Part of the outer wall surface of the first guide portion (121) is in contact with the inner wall surface of the first chamber (112). The outer diameter of the first sealing portion (122) is smaller than the inner diameter of the first chamber (112). The first sealing portion (122) is used to seal the first sealing ring (111).

2. The self-locking quick-connect coupling according to claim 1, characterized in that, The first valve core assembly further includes: The first valve core (12) is located in the first chamber (112), and at least part of it is located in the first sealing ring (111); The first cannula (13) is located at the end of the first chamber (112) away from the first sealing ring (111); The first spring (14) is located between the first insertion tube (13) and the first valve core (12) and is used to apply a force toward the first sealing ring (111) to the first valve core (12); The first guide part (121), the first sealing part (122), and the first fluid passage (125) are disposed on the first valve core (12).

3. The self-locking quick-connect coupling according to claim 2, characterized in that, The first fluid channel (125) includes: The first channel (1251) is arranged axially and opens at the end of the first guide portion (121) away from the first sealing portion (122); The second channel (1252) is connected to the first channel (1251), and one end away from the first channel (1251) opens on the radial outer wall of the first valve core (12); The axis of the second channel (1252) is inclined to the axis of the first channel (1251) or perpendicular to the axis of the first channel (1251); There is a distance between the outer side of the opening end of the second channel (1252) and the inner wall of the first chamber (112).

4. The self-locking quick-connect coupling according to claim 3, characterized in that, The first valve core (12) further includes: The first limiting ring (124) is disposed between the first sealing part (122) and the first guide part (121), and its outer diameter is larger than the inner diameter of the first sealing ring (111) and smaller than the inner diameter of the first chamber (112); The first sealing groove (123) is disposed between the first limiting ring (124) and the first sealing part (122); The first sealing ring (15) is located in the first sealing groove (123), and its outer diameter is larger than the inner diameter of the first sealing ring (111); The first push part (126) is located at the end of the first sealing part (122) away from the first sealing groove (123), and its outer diameter is smaller than the outer diameter of the first sealing part (122); In particular, the radial length of the first push portion (126) gradually decreases along the axial direction away from the first sealing portion (122).

5. The self-locking quick-connect coupling according to claim 1, characterized in that, The second valve core assembly includes: The second valve core (23) is located in the third chamber (211), and is at least partially located in the second sealing ring (22); The second cannula (25) is located at the end of the third chamber (211) away from the second sealing ring (22); The second spring (24) is located between the second insertion tube (25) and the second valve core (23) and is used to apply a force to the second valve core (23) toward the second sealing ring (22).

6. The self-locking quick-connect coupling according to claim 5, characterized in that, The second valve core (23) includes: The second guide section is located in the third chamber (211), and part of its outer wall surface is in contact with the inner wall surface of the third chamber (211); The second fluid channel is provided on the second guide portion, with one end opening at the axial end of the second guide portion away from the second sealing ring (22), and the other end opening on the radial outer wall of the second guide portion; The second sealing part is located at one end of the second guide part near the second sealing ring (22), and its outer diameter is smaller than the inner diameter of the third chamber (211), and is used to seal the second sealing ring (22). The second limiting ring is located between the second sealing part and the second guide part. Its outer diameter is larger than the inner diameter of the second sealing ring (22) and smaller than the inner diameter of the third chamber (211). The second sealing groove is located between the second limiting ring and the second sealing part; The second sealing ring (26) is located in the second sealing groove, and its outer diameter is larger than the inner diameter of the second sealing ring (22); The second pusher is located at the end of the second sealing part away from the second sealing groove, and its outer diameter is smaller than the outer diameter of the second sealing part. In particular, the radial length of the second push portion gradually decreases along the axial direction away from the second seal.

7. The self-locking quick-connect coupling according to claim 6, characterized in that, The second fluid channel includes: The third channel is arranged axially and opens at the end of the second guide portion away from the second sealing portion; The fourth channel is connected to the third channel, and the end away from the third channel opens on the radial outer wall of the second valve core (23); The axis of the fourth channel is inclined to the axis of the third channel or perpendicular to the axis of the third channel; There is a distance between the outer side of the opening end of the fourth channel and the inner wall of the third chamber (211).

8. The self-locking quick-connect coupling according to claim 1, characterized in that, The second valve body assembly (2) includes: The second valve sleeve (21), whose outer diameter is less than or equal to the inner diameter of the second chamber (113), is used to install the second valve core assembly; The third sealing groove (213), at least one, is located outside the second valve sleeve (21); The third sealing ring (214) is located in the third sealing groove (213), and its outer diameter is larger than the inner diameter of the second chamber (113).

9. The self-locking quick-connect coupling according to claim 8, characterized in that, The first valve body assembly (1) includes: The first valve sleeve (11) includes a first sealing ring (111), a first chamber (112), a second chamber (113) and a fourth chamber (114). The inner diameter of the fourth chamber (114) is larger than that of the second chamber (113). The fourth chamber (114) is located at the end of the second chamber (113) away from the first chamber (112). The second valve sleeve (21) is slidably located in the second chamber (113) and the fourth chamber (114).

10. The self-locking quick-connect coupling according to claim 9, characterized in that, The locking mechanism (3) includes: Mounting hole (115) is provided on the first valve sleeve (11) and passes through the first valve sleeve (11) radially. A steel ball (31) is placed inside the mounting hole (115); Lock groove (212) is located on the outside of the second valve sleeve (21) and is used to accommodate part of the steel ball (31). The third spring (33) is sleeved outside the first valve sleeve (11); The sleeve (32) includes a first cylindrical part and a second cylindrical part, the inner diameter of the first cylindrical part is larger than the inner diameter of the second cylindrical part, and the first cylindrical part is sleeved on the outside of the third spring (33); Wherein, the first valve sleeve (11) is provided with a limiting step (116), and the two ends of the third spring (33) act with the limiting step (116) and the side end of the second cylinder respectively. When the third spring (33) is in its natural state, the second cylinder is located outside the mounting hole (115). Wherein, the diameter of the steel ball (31) is D, the radial depth of the mounting hole (115) is D1, the radial depth of the locking groove (212) is D2, D>D1, D>D2, (D1+D2)≥D.

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