Fluid connector

Abstract

The application relates to the technical field of valves, in particular to a fluid connector. The fluid connector comprises a female connector, a male connector and a limiting structure; the female connector comprises a first valve pipe provided with a first pipe cavity, and a limiting hole is arranged in the pipe wall of the first valve pipe and communicated with the first pipe cavity; the male connector comprises a second valve pipe, and the second valve pipe is movably inserted into the first pipe cavity; the limiting structure comprises a limiting seat, a first limiting piece and a movable assembly; the limiting seat and the movable assembly are respectively sleeved on the first valve pipe; along the radial direction of the first valve pipe, the movable assembly is located between the limiting seat and the first valve pipe; along the axial direction of the first valve pipe, the movable assembly is movably arranged between the first valve pipe and the limiting seat; and the first limiting piece is movably arranged in the limiting hole. The position state of the first limiting piece can be controlled only by controlling the movement of the movable assembly, and when the male connector is inserted into the female connector and communication is realized, the first limiting piece can effectively limit the male connector.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a fluid connector. Background Technology

[0002] A fluid connector includes a male connector and a female connector. When the fluid is disconnected between the male and female connectors, the male connector and the female connector can respectively block and seal the fluid. When the male connector is continuously inserted into the female connector, fluid communication can be formed between the two.

[0003] In related technologies, the mating of male and female connectors presents the problem of easy unplugging after insertion, affecting the stability of fluid communication. Utility Model Content

[0004] Therefore, it is necessary to provide a fluid connector to achieve effective limiting after the male and female connectors are mated.

[0005] The fluid connector includes a female connector, a male connector, and a limiting structure; the female connector includes a first valve tube with a first cavity, and the wall of the first valve tube has a limiting hole communicating with the first cavity; the male connector includes a second valve tube, which is movably inserted into the first cavity; the second valve tube has a first limiting portion protruding outward; the limiting structure includes a limiting seat, a first limiting member, and a movable component; the limiting seat and the movable component are respectively sleeved on the first valve tube; along the radial direction of the first valve tube, the movable component is located between the limiting seat and the first valve tube; along the radial direction of the first valve tube... Along the axial direction of the pipe, the movable component is movably disposed between the first valve pipe and the limiting seat; the first limiting member is movably disposed in the limiting hole; the limiting structure has a first state and a second state; in the first state, the first limiting member is located in the limiting hole and extends out of the limiting hole, along the axial direction of the limiting structure, the first limiting portion abuts against the first limiting member, and along the radial direction of the limiting structure, the first limiting member is pressed between the movable component and the first limiting portion; in the second state, the movable component moves away from the first limiting member along the axial direction of the first valve pipe.

[0006] It is understandable that the male connector switches between open and closed states by the movement of the second valve tube relative to the first valve tube. The limiting structure can limit the movement of the male connector by the first limiting member. In the first state, the second valve tube can move towards the inside of the first valve tube, and the limiting hole limits the first limiting member. The movable component can press the first limiting member into the limiting hole, causing it to extend out of the limiting hole and limit the first limiting part, thus fixing the position of the second valve tube. This makes it difficult for the male connector to be pulled out after being inserted into the female connector, forming an effective limiting effect, and ensuring stable communication between the male and female connectors. In the second state, the movable component can move away from the first limiting member to release the pressing effect on the first limiting member. Under the pressure of the first limiting part, the first limiting member moves from the limiting hole into the limiting space, thus releasing the limiting effect on the second valve tube. The entire process only requires controlling the movement of the movable component to control the position of the first limiting member, making operation convenient.

[0007] In one embodiment, the movable component includes a limiting sleeve and a first elastic element along the axial direction of the first valve tube, the first elastic element being connected between the first valve tube and the limiting sleeve;

[0008] In the first state, the limiting sleeve is pressed against the surface of the first limiting member located within the limiting space under the action of the elastic force of the first elastic member; in the second state, the limiting sleeve moves away from the first limiting member along the axial direction of the first valve tube, and the first elastic member undergoes elastic deformation.

[0009] In one embodiment, the surface of the limiting sleeve facing the first limiting member is provided with a first limiting groove, and the first limiting groove is formed by a radial recess along the limiting sleeve;

[0010] In the first state, a portion of the structure of the first limiting member is located in the first limiting groove, and along the radial direction of the limiting structure, the groove wall of the first limiting groove presses against one side of the first limiting member located in the limiting space.

[0011] In one embodiment, along the axial direction of the limiting seat, the limiting sleeve is provided with a guide section on the side near the first limiting member, and the guide section is connected to the groove edge of the first limiting groove.

[0012] Along the axis of the first valve tube, the guide section is tapered away from the first elastic member, and along the radial direction of the first valve tube, the surface of the guide section facing the first limiting member forms a guide slope.

[0013] In one embodiment, along the radial direction of the first valve tube, the limiting seat is provided with a second limiting portion protruding inward near the inner sidewall of the first limiting member; in the first state, along the axial direction of the first valve tube, the limiting sleeve abuts against the surface of the second limiting portion facing the limiting sleeve.

[0014] In one embodiment, the first valve tube has a limiting boss protruding outward along its own radial direction, and the first elastic element is connected between the limiting boss and the limiting sleeve.

[0015] In one embodiment, the first limiting portion includes a limiting section and a transition section. In the first state, the limiting section is pressed against the first limiting member. Along the axial direction of the second valve pipe, the transition section is connected to the limiting section and is close to the first valve pipe relative to the limiting section.

[0016] Along the axial direction of the second valve tube, the transition section gradually narrows from the limiting section toward the first valve tube and forms a first inclined surface, and the limiting section gradually narrows from the transition section toward a direction away from the first valve tube and forms a second inclined surface. The angle between the first inclined surface and the radial direction of the second valve tube is greater than the angle between the second inclined surface and the radial direction of the second valve tube.

[0017] In one embodiment, a third limiting portion is provided inwardly along the radial direction of the first valve tube, and in the second state, the third limiting portion is used to axially limit the first limiting member.

[0018] In one embodiment, the outer wall of the first valve pipe is recessed radially inward to form a second limiting groove; the limiting seat is provided with a fourth limiting part, which is connected to the side of the third limiting part away from the limiting space and is set at an angle to the third limiting part. The fourth limiting part and the third limiting part surround to form an accommodating space, which communicates with the second limiting groove; the limiting structure also includes a second limiting member; the second limiting member is disposed in the accommodating space and the second limiting groove, and the third limiting part and the fourth limiting part abut against the second limiting member.

[0019] In one embodiment, the surface of the limiting seat is provided with an outwardly protruding anti-slip protrusion along the radial direction of the first valve tube; and / or, the surface of the limiting seat is recessed inwardly along the radial direction of the first valve tube to form an anti-slip groove.

[0020] The female connector further includes a first valve stem, a first valve core, and a second elastic element installed in the first tube cavity; the first valve core is provided with a first flow hole that extends along its own axial direction; one end of the first valve stem passes through the first flow hole, and the other end is provided with a fourth limiting part that limits and cooperates with the inner tube wall of the first valve tube; along the axial direction of the first valve tube, the second elastic element is connected between the fourth limiting part and the first valve core.

[0021] The fluid connector has an open state and an open state;

[0022] In the first valve tube and the first valve core, at least the first valve tube is equipped with a seal. In the disconnected state, along the radial direction of the female connector, the inner wall of the first valve tube is pressed against one side of the seal, and the outer wall of the first valve core is pressed against the other side of the seal. In the connected state, along the radial direction of the female connector, the inner wall of the first valve tube is pressed against one side of the seal, and the outer wall of the second valve tube is pressed against the other side of the seal. And / or, in the first valve core and the first valve stem, at least the first valve stem is equipped with a seal. In the disconnected state, along the radial direction of the female connector, the inner wall of the first valve core is pressed against one side of the seal, and the outer wall of the first valve stem is pressed against the other side of the seal.

[0023] The male connector includes a second valve core and a third elastic element. The second valve tube has a second cavity extending along its own axial direction. The second valve core and the third elastic element are respectively installed in the second cavity. Along the axial direction of the second valve tube, the third elastic element is connected between the ends of the second valve core and the second valve tube. The second valve core abuts against the first valve stem. The second valve tube abuts against the first valve core.

[0024] In the second valve core and the second valve tube, at least the second valve core is provided with a seal. In the disconnected state, along the radial direction of the male connector, the outer wall of the second valve core is pressed against one side of the seal, and the inner wall of the second valve tube is pressed against the other side of the seal; and / or, in the second valve tube and the first valve tube, at least the first valve tube is provided with a seal. In the disconnected state and the connected state, along the radial direction of the male connector, the outer wall of the second valve tube is pressed against one side of the seal, and the inner wall of the first valve tube is pressed against the other side of the seal. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a partial enlarged view of the fluid connector provided in this application when the fluid connector is closed;

[0027] Figure 2 A partially enlarged view of the fluid connector provided in this application when the fluid connector is open;

[0028] Figure 3 A cross-sectional view of the fluid connector when closed, according to a first embodiment of the fluid connector provided in this application;

[0029] Figure 4 A cross-sectional view of the fluid connector when it is open, according to a first embodiment of the fluid connector provided in this application;

[0030] Figure 5 A schematic diagram of the structure of the first valve stem in a first embodiment of the fluid connector provided in this application;

[0031] Figure 6 A cross-sectional view of the fluid connector when closed, according to a second embodiment of the fluid connector provided in this application;

[0032] Figure 7 A cross-sectional view of the fluid connector when it is open, according to a second embodiment of the fluid connector provided in this application;

[0033] Figure 8 A schematic diagram of the structure of the first valve stem in a second embodiment of the fluid connector provided in this application;

[0034] Figure 9 This is a schematic diagram of the structure of the second valve core in the fluid connector provided in this application.

[0035] Reference numerals: 100, fluid connector; 10, female connector; 101, fluid channel; 102, first flow port; 11, first valve tube; 111, first cavity; 112, third limiting groove; 113, sixth limiting part; 114, first assembly groove; 115, limiting hole; 116, limiting boss; 117, second limiting groove; 12, first valve stem; 121, stem body; 1211, second flow port; 122 1221. Fifth limiting part; 1221. First limiting arm; 12211. First arm body; 1222. Fourth limiting groove; 123. Pressure relief hole; 13. First valve core assembly; 131. First valve core; 1311. First flow hole; 1312. First mating part; 132. Second elastic element; 14. First limiting ring; 15. Connector; 20. Male connector; 21. Second valve tube; 211. Second cavity; 212. Seventh 213. Limiting part; 214. Second assembly groove; 215. First limiting part; 2141. Transition section; 21411. First inclined surface; 2142. Limiting section; 21421. Second inclined surface; 22. Second valve core assembly; 221. Second valve core; 2211. Second mating part; 2212. Second limiting arm; 22121. Fifth limiting groove; 222. Third elastic element; 223. Third flow port; 24. Second limiting... Position ring; 30, limiting structure; 301, limiting space; 302, accommodating space; 31, limiting seat; 311, second limiting part; 312, third limiting part; 313, fourth limiting part; 314, anti-slip groove; 32, movable component; 321, limiting sleeve; 3211, first limiting groove; 3212, guide section; 322, first elastic element; 33, first limiting element; 34, second limiting element; 40, sealing element. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] It should be noted that when a component is referred to as being "fixed to," "set on," or "properly placed on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0041] Please see Figures 1 to 9 This application provides a fluid connector 100, which includes a female connector 10 and a male connector 20. The opening and closing of the fluid connector 100 is achieved by inserting and removing the male connector 20 relative to the female connector 10. The female connector 10 includes a first valve tube 11 with a first cavity 111, and the male connector 20 includes a second valve tube 21, which is movably inserted into the first cavity 111.

[0042] like Figure 1 and Figure 2 As shown, the fluid connector 100 also includes a limiting structure 30, which can limit the second valve tube 21 after it is inserted into the first cavity 111. The second valve tube 21 is provided with a first limiting part 214 protruding outward, which can cooperate with the limiting structure 30 for limiting.

[0043] like Figure 1 and Figure 2As shown, in a specific embodiment, the limiting structure 30 includes a limiting seat 31 and a movable component 32. The limiting seat 31 and the movable component 32 are respectively sleeved on the first valve pipe 11; a limiting space 301 is formed between the limiting seat 31 and the first valve pipe 11, and the movable component 32 is movably disposed within the limiting space 301. The limiting seat 31 is used to assemble the movable component 32 and can limit and guide the movement of the movable component 32.

[0044] like Figure 1 and Figure 2 As shown, in a specific embodiment, the limiting structure 30 further includes a first limiting member 33. The wall of the first valve pipe 11 has a limiting hole 115 communicating with the first cavity 111, and the first limiting member 33 is movably disposed in the limiting hole 115 and the limiting space 301. The limiting hole 115 can restrict the movement of the first limiting member 33 along the axial direction of the first valve pipe 11.

[0045] The limiting structure 30 has a first state and a second state. In the first state, the first limiting member 33 is located inside and extends out of the limiting hole 115. Along the axial direction of the limiting structure 30, the first limiting part 214 abuts against the first limiting member 33. Along the radial direction of the limiting structure 30, the first limiting member 33 is pressed between the movable component 32 and the first limiting part 214. After the male connector 20 is continuously inserted into the female connector 10, it limits the second valve pipe 21, so that the male connector 20 and the female connector 10 maintain fluid flow, and realize the stable assembly of the male connector 20 and the female connector 10.

[0046] In the second state, the movable component 32 moves axially away from the first limiting member 33 along the first valve tube 11 to release the limiting effect on the first limiting member 33. At this time, the side of the first limiting member 33 facing the limiting space 301 is not under force, while the side of the first limiting member 33 facing the first tube cavity 111 is subjected to the squeezing force of the first limiting part 214. Therefore, under the force of the first limiting part 214, the first limiting member 33 enters the limiting space 301 to release the limiting effect on the second valve tube 21. During the continuous insertion of the second valve tube 21 into the first valve tube 11, the first limiting member 33 moves from the limiting hole 115 to the limiting space 301 to avoid the second valve tube 21, facilitating the continuous insertion of the second valve tube 21 and promoting the connection of the fluid connector 100. When the second valve tube 21 moves outward from the first valve tube 11 along the axial direction of the first valve tube 11, the first limiting member 33 moves from the limiting hole 115 to the limiting space 301 to avoid the second valve tube 21, which facilitates the second valve tube 21 to move outward from the first valve tube 11 and promotes the reset of the second valve tube 21 to realize the disconnection of the fluid connector 100.

[0047] In summary, by reciprocating along the axial direction of the first valve tube 11, the compression or release of the first limiting member 33 can be switched, allowing the first limiting member 33 to switch between limiting and releasing the second valve tube 21, thus facilitating the smooth and rapid insertion and removal of the male connector 20 relative to the female connector 10. It is precisely the pressing force exerted by the movable component 32 on the first limiting member 33 that enhances the reliability of the first limiting member 33's limiting of the male connector 20.

[0048] First, the limiting structure 30 will be described in detail.

[0049] like Figure 1 and Figure 2 As shown, in an optional embodiment, the movable component 32 includes a limiting sleeve 321 and a first elastic member 322. Along the axial direction of the first valve tube 11, the first elastic member 322 is connected between the first valve tube 11 and the limiting sleeve 321. Thus, the first elastic member 322 exerts an elastic force on the limiting sleeve 321, pressing it against the limiting sleeve 321. Under the elastic force of the first elastic member 322, the limiting sleeve 321 is pressed against the first limiting member 33. Under the elastic force of the first elastic member 322, the limiting sleeve 321 is pressed against the surface of the first limiting member 33 located within the limiting space 301. In a second state, the limiting sleeve 321 moves away from the first limiting member 33 along the axial direction of the first valve tube 11, causing the first elastic member 322 to undergo elastic deformation. The first limiting member 33 can then enter the limiting space 301 through the limiting hole 115, thereby releasing the limiting effect on the second valve tube 21. When the limiting seat 31 loses the external force, under the action of the first elastic element 322, the limiting sleeve 321 drives the limiting seat 31 to reset, and the limiting sleeve 321 can squeeze the first limiting element 33 again, so that the first limiting element 33 enters the limiting hole 115 from the limiting space 301 and extends out of the limiting hole 115.

[0050] like Figure 1 and Figure 2 As shown, in a further embodiment, the surface of the limiting sleeve 321 facing the first limiting member 33 is provided with a first limiting groove 3211, which is recessed along the radial direction of the limiting sleeve 321. In the first state, a portion of the structure of the first limiting member 33 is located in the first limiting groove 3211, and the groove wall of the first limiting groove 3211 presses against one side of the limiting space 301 along the radial direction of the limiting structure 30. By having the groove wall of the first limiting groove 3211 contact the first limiting member 33, the contact area between the limiting sleeve 321 and the first limiting member 33 is increased, which helps to enhance the reliability of limiting the first limiting member 33, so that the first limiting member 33 can be limited both axially and radially along the limiting sleeve 321, avoiding the first limiting member 33 from shaking and improving the limiting stability of the first limiting member 33 on the second valve pipe 21.

[0051] like Figure 1 and Figure 2 As shown, in a specific embodiment, the groove wall of the first limiting groove 3211 is set as an arc-shaped curved surface to adapt to the smooth surface of the first limiting member 33, so that the groove wall of the first limiting groove 3211 can fit with the surface of the first limiting member 33, increasing the contact area, improving the limiting stability, reducing wear, and helping to extend the service life.

[0052] like Figure 1 and Figure 2 As shown, in a specific embodiment, the first limiting member 33 uses ball bearings to form a smooth surface and facilitate flexible rolling.

[0053] like Figure 1 and Figure 2 As shown, in an optional embodiment, along the axial direction of the limiting seat 31, the limiting sleeve 321 has a guide section 3212 on the side near the first limiting member 33. The guide section 3212 is connected to the edge of the groove of the first limiting groove 3211 and can guide the first limiting member 33 to transition. During the transition from the second state to the first state, the limiting sleeve 321 moves toward the first limiting member 33 located in the limiting space 301. The guide section 3212 can guide the first limiting member 33 to move into the first limiting groove 3211, so that the first limiting member 33 is stably limited between the groove wall of the first limiting groove 3211 and the second valve pipe 21.

[0054] like Figure 1 and Figure 2 As shown, in a specific embodiment, along the axis of the first valve tube 11, the guide section 3212 is gradually tapered away from the first elastic member 322. Along the radial direction of the first valve tube 11, the guide section 3212 forms a guide slope on the surface facing the first limiting member 33, so that the first limiting member 33 can move into the first limiting groove 3211 along the inclined direction of the guide slope under the compression of the limiting sleeve 321. The structure is simple and easy to process.

[0055] like Figure 1 and Figure 2 As shown, in a specific embodiment, along the radial direction of the first valve pipe 11, the limiting seat 31 is provided with a second limiting part 311 protruding inward near the inner sidewall of the first limiting member 33; in the first state, along the axial direction of the first valve pipe 11, the limiting sleeve 321 abuts against the surface of the second limiting part 311 facing the limiting sleeve 321, and the second limiting part 311 can restrict the axial movement of the limiting sleeve 321, and can also limit the first limiting member 33 when the first limiting member 33 enters the limiting space 301.

[0056] like Figure 1 and Figure 2As shown, in a specific embodiment, the first valve pipe 11 is provided with a limiting boss 116 protruding outward along its own radial direction, and the first elastic member 322 is connected between the limiting boss 116 and the limiting sleeve 321. The limiting boss 116 is provided to limit the first elastic member 322, so as to facilitate the installation and fixation of the first elastic member 322.

[0057] like Figure 1 and Figure 2 As shown, in an optional embodiment, the second valve tube 21 is provided with a first limiting portion 214 along the radial direction of the second valve tube 21 to form an abutment with the first limiting member 33, and the first limiting member 33 can be pressed into the groove wall of the first limiting portion 214 and the first limiting groove 3211.

[0058] like Figure 1 and Figure 2 As shown, in a further embodiment, the first limiting portion 214 includes a limiting section 2142 and a transition section 2141. In a first state, the limiting section 2142 is pressed against the first limiting member 33. Along the axial direction of the second valve tube 21, the transition section 2141 is connected to the limiting section 2142 and is close to the first valve tube 11 relative to the limiting section 2142. During the continuous insertion of the second valve tube 21 into the first valve tube 11, the transition section 2141 can gradually push the first limiting member 33 from the limiting hole 115 toward the limiting space 301, playing a transitional role. As the second valve tube 21 is further inserted, the first limiting member 33 is no longer squeezed by the transition section 2141 and abuts against the limiting section 2142. The first limiting member 33 is pressed between the limiting section 2142, the outer wall of the second valve tube 21, and the groove wall of the first limiting groove 3211.

[0059] like Figure 1 and Figure 2 As shown, in a specific embodiment, along the axial direction of the second valve tube 21, the transition section 2141 gradually narrows from the limiting section 2142 toward the first valve tube 11 and forms a first inclined surface 21411. This allows the transition section 2141 to gradually increase the pressure on the first limiting member 33 as the second valve tube 21 is continuously inserted into the first cavity 111, thus reducing wear and dispersing stress. Simultaneously, the first inclined surface 21411 also guides the first limiting member 33, facilitating its movement toward the limiting space 301 and allowing the second valve tube 21 to move smoothly into the first cavity 111.

[0060] like Figure 1 and Figure 2As shown, in a further embodiment, along the axial direction of the second valve tube 21, the limiting section 2142 gradually narrows from the transition section 2141 toward the direction away from the first valve tube 11 and forms a second inclined surface 21421. The setting of the second inclined surface 21421 is beneficial to disperse the squeezing force between the second valve tube 21 and the first limiting member 33. At the same time, when the second valve tube 21 moves outward from the first valve tube 11 along its own axial direction, the second inclined surface 21421 has a guiding effect on the first limiting member 33, so that the first limiting member 33 moves along the inclined direction of the second inclined surface 21421, promoting the first limiting member 33 to roll from the limiting hole 115 toward the limiting space 301, so as to remove the limitation on the second valve tube 21 and make the movement of the second valve tube 21 smoother.

[0061] In a specific embodiment, the angle between the first inclined surface 21411 and the radial direction of the second valve tube 21 is greater than the angle between the second inclined surface 21421 and the radial direction of the second valve tube 21. Thus, the first inclined surface 21411 has a sufficient inclination angle to form a good transition and guide, while the second inclined surface 21421 can ensure the reliability of axial limiting of the first limiting member 33 while having a certain guiding function.

[0062] like Figure 1 and Figure 2 As shown, in an optional embodiment, a third limiting part 312 is provided inwardly along the radial direction of the first valve pipe 11. In the second state, the first limiting member 33 enters into the limiting space 301, and the third limiting part 312 is used to axially limit the first limiting member 33 to prevent the first limiting member 33 from coming out.

[0063] like Figure 1 and Figure 2 As shown, in a further embodiment, the outer wall of the first valve pipe 11 is recessed inward along its own radial direction to form a second limiting groove 117; the limiting seat 31 is provided with a fourth limiting part 313, which is connected to the side of the third limiting part 312 away from the limiting space 301 and is set at an angle to the third limiting part 312. The fourth limiting part 313 and the third limiting part 312 surround to form a receiving space 302, which is connected to the second limiting groove 117; the limiting structure 30 also includes a second limiting member 34; the second limiting member 34 is disposed in the receiving space 302 and the second limiting groove 117, and the third limiting part 312 and the fourth limiting part 313 abut against the second limiting member 34.

[0064] Thus, the second limiting groove 117 can initially position the second limiting member 34. Through the setting of the third limiting part 312, the third limiting part 312 and the second limiting member 34 have a mutual limiting effect along the axial direction of the first valve tube 11. Through the setting of the fourth limiting part 313, the fourth limiting part 313 and the second limiting member 34 have a mutual limiting effect along the radial direction of the first valve tube 11. That is, through the second limiting member 34, the limiting seat 31 and the first valve tube 11 are relatively fixed, preventing the limiting seat 31 from moving when the male connector 20 is inserted or removed from the female connector 10, so as to ensure the limiting effect.

[0065] In a specific embodiment, the second limiting member 34 can be configured as a limiting ring.

[0066] In a specific embodiment, along the radial direction of the first valve pipe 11, the surface of the limiting seat 31 is provided with an anti-slip protrusion to increase the friction of the surface of the limiting seat 31 and prevent slippage during operation.

[0067] like Figure 1 and Figure 2 As shown, in another specific embodiment, along the radial direction of the first valve pipe 11, the surface of the limiting seat 31 is recessed inward to form an anti-slip groove 314, so as to increase the friction of the surface of the limiting seat 31 and prevent slippage during operation.

[0068] Next, the structure of the female connector 10 will be described.

[0069] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in an optional embodiment, the female connector 10 includes a first valve tube 11 and a first valve stem 12. The first valve tube 11 has a first cavity 111 that extends through its own axial direction. The first valve stem 12 is installed in the first cavity 111. The first cavity 111 forms an assembly space for the first valve stem 12, which can protect the first valve stem 12.

[0070] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in a specific embodiment, the female connector 10 further includes a connector 15, which is connected to the first valve pipe 11 and communicates with the first pipe cavity 111. The connector 15 facilitates the connection of the female connector 10 to external pipe fittings, which helps to protect the structure of the female connector 10.

[0071] like Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, in a specific embodiment, the inner wall of the first valve pipe 11 is radially recessed along the female connector 10 to form a third limiting groove 112. The third limiting groove 112 communicates with the first pipe cavity 111 and axially communicates with the opening of the first valve pipe 11 along the female connector 10. Further, the first valve stem 12 is provided with a stem body 121 and a fifth limiting portion 122 connected to the end of the stem body 121. Radially along the female connector 10, the fifth limiting portion 122 extends outward from the stem body 121, passes through the third limiting groove 112, and abuts against the groove wall of the third limiting groove 112 along the axial direction of the female connector 10. Thus, the axial direction of the fifth limiting portion 122 is limited by the groove wall of the third limiting groove 112, facilitating the assembly of the first valve stem 12. The operation is simple and unlikely to interfere with the connector 15; only the abutment between the groove wall of the third limiting groove 112 and the fifth limiting portion 122 is required.

[0072] In some embodiments, the fifth limiting part 122 is welded to the first valve pipe 11. The welding connection method is less prone to displacement during welding, which facilitates direct connection and fixation between the two, enhances connection stability, and simplifies assembly, thus improving assembly efficiency.

[0073] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in a further specific embodiment, and in some other embodiments, the groove wall of the third limiting groove 112 is recessed radially along the female connector 10 to form a first assembly groove 114. The female connector 10 also includes a first limiting ring 14, which is disposed in the first assembly groove 114 and extends radially from the first assembly groove 114 along the female connector 10. Along the axial direction of the female connector 10, the fifth limiting part 122 is limited between the first limiting ring 14 and the groove wall of the third limiting groove 112. In this way, the fifth limiting part 122 is assembled and fixed, which is simple to operate, easy to disassemble and replace, and does not require high precision during processing, making processing more convenient.

[0074] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in an optional embodiment, the female connector 10 further includes a first valve core assembly 13, which has a first flow hole 1311 extending axially along the first valve tube 11. One end of the rod 121, axially away from the fifth limiting part 122, passes through the first flow hole 1311, and the fifth limiting part 122 engages with the inner wall of the first valve tube 11. Thus, the first valve stem 12 can be fixed in place by the fifth limiting part 122. Simultaneously, the first valve stem 12 passing through the first flow hole 1311 allows the first valve core assembly 13 to move axially along the first valve tube 11 outside the rod 121 of the first valve stem 12.

[0075] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in an optional embodiment, the first valve core assembly 13 includes a first valve core 131, a first flow hole 1311 of the first valve core 131, and is sleeved on the first valve stem 12 through the first flow hole 1311. The first valve core 131 can move relative to the first valve stem 12 along the axial direction of the first valve tube 11 to realize the switching of fluid flow.

[0076] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in a further embodiment, the first valve core assembly 13 further includes a second elastic element 132, which is sleeved on the first valve stem 12. The fifth limiting part 122 is provided with a fourth limiting groove 1222. One end of the second elastic element 132 is connected to the groove wall of the fourth limiting groove 1222, and the other end is connected to the first valve core 131. Thus, the movement of the first valve core 131 will cause elastic deformation of the second elastic element 132. After the first valve core 131 loses the force required for movement, it can be reset by the elastic force of the second elastic element 132. In addition, the fifth limiting part 122, by providing the fourth limiting groove 1222, radially limits the second elastic element 132, ensuring the stable and reliable assembly of the second elastic element 132, avoiding the shaking of the second elastic element 132, and promoting the stable movement of the first valve core 131.

[0077] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in an optional embodiment, the inner wall of the first valve pipe 11 has a sixth limiting portion 113 protruding radially, and the first valve core 131 has a first mating portion 1312 protruding radially outward. When the fluid in the female connector 10 is not connected to the outside, under the action of the first elastic member, the first valve core 131 can abut against the sixth limiting portion 113 through the first mating portion 1312, and the sixth limiting portion 113 plays an axial limiting role for the first valve core 131.

[0078] like Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, in a specific embodiment, the sixth limiting portion 113 gradually increases in size along the radial dimension of the first valve tube 11 in a direction away from the second elastic member 132 along the axis of the first valve tube 11. Correspondingly, the first mating portion 1312 gradually decreases in size along the radial dimension of the first valve core 131 in a direction away from the second elastic member 132 along its own axial direction. The sixth limiting portion 113 forms an inclined first limiting surface, and the first mating portion 1312 forms an inclined first mating surface. The first limiting surface and the first mating surface fit together to increase the limiting area and facilitate the dispersion of force, reducing stress concentration.

[0079] In an optional embodiment, when the fluid in the female connector 10 is not connected to the outside, the first valve core 131 can form a seal with the first valve pipe 11 and the first valve stem 12 respectively. That is, a seal is formed between the first valve core 131 and the first valve pipe 11, and a seal is formed between the first valve core 131 and the first valve stem 12 to prevent fluid leakage to the outside.

[0080] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in a specific embodiment, at least the first valve tube 11 is equipped with a seal 40. In the disconnected state, along the radial direction of the female connector 10, the inner wall of the first valve tube 11 is pressed against one side of the seal 40, and the outer wall of the first valve core 131 is pressed against the other side of the seal 40 to prevent fluid leakage between the first valve tube 11 and the first valve core 131. In the connected state, along the radial direction of the female connector 10, the inner wall of the first valve tube 11 is pressed against one side of the seal 40, and the outer wall of the second valve tube 21 is pressed against the other side of the seal 40 to prevent fluid leakage between the first valve tube 11 and the second valve tube 21. Exemplarily, the first valve tube 11 is provided with a seal 40; or, both the first valve tube 11 and the first valve core 131 are provided with seals 40.

[0081] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in a specific embodiment, at least the first valve stem 12 is provided with a sealing element 40 in the first valve core 131 and the first valve stem 12. In the open state, along the radial direction of the female connector 10, the inner wall of the first valve core 131 is pressed against one side of the sealing element 40, and the outer wall of the first valve stem 12 is pressed against the other side of the sealing element 40 to prevent fluid leakage between the first valve stem 12 and the first valve core 131. For example, the first valve stem 12 is provided with the sealing element 40; or, both the first valve core 131 and the first valve stem 12 are provided with the sealing element 40.

[0082] The sealing element 40 is provided to disconnect the female connector 10 from the outside. In a specific embodiment, the sealing element 40 can be a sealing ring, which can be installed by opening a sealing groove to effectively limit and assemble the sealing ring.

[0083] like Figures 3 to 5 As shown, in the first embodiment of this application, the female connector 10 is provided with a fluid channel 101, which is located between the first valve stem 12 and the first valve pipe 11. The fifth limiting part 122 includes at least two spaced first limiting arms 1221, which extend outward from the stem body 121 along the radial direction of the female connector 10. Any two adjacent first limiting arms 1221 and the inner wall of the first valve pipe 11 form a first flow port 102 that communicates with the fluid channel 101. In this way, fluid can directly pass through the first flow port 102 between the two first limiting arms 1221 and the first valve pipe 11 and enter the fluid channel 101. At the same time, the first limiting arms 1221 can be directly limited and assembled with the first valve pipe 11 to achieve the limiting and fixing of the first valve stem 12, which is simple to operate.

[0084] In a further embodiment, the first limiting arm 1221 includes a first arm body 12211, which is connected to the rod body 121. Along the radial direction of the female connector 10, each first arm body 12211 extends outward from the rod body 121. The first arm body 12211 is inserted into the third limiting groove 112 and abuts against the groove wall of the third limiting groove 112. The first arm body 12211 and the groove wall of the third limiting groove 112 limit the position. The structure is simple and easy to process.

[0085] In another further embodiment, the first limiting arm 1221 includes a first arm body 12211 and a second arm body. The first arm body 12211 is connected between the rod body 121 and the second arm body. The rod body 121, the second arm body, and the first arm body 12211 are arranged at an angle to each other. The second arm body is inserted into the third limiting groove 112 and abuts against the groove wall of the third limiting groove 112. In this way, the second arm body has a larger area to cooperate with the groove wall of the third limiting groove 112, which helps to enhance the limiting effect. Along the circumference of the first valve pipe 11, a first flow port 102 is formed between two adjacent second arms, two adjacent first arms 12211, and the inner wall of the first valve pipe 11. There is a gap between two adjacent second arms to form part of the first flow port 102, which facilitates the passage of fluid.

[0086] In specific embodiments, the number of first limiting arms 1221 does not exceed five, so as to ensure the limiting effect while avoiding significant flow obstruction to the fluid and ensuring flow performance. For example, there may be two, three, or five first limiting arms 1221.

[0087] like Figures 6 to 8 As shown, in the second embodiment, the female connector 10 is provided with a fluid channel 101, which is located inside the rod 121 and extends axially along the rod 121. At one end of the rod 121 where the fifth limiting part 122 is located, there is a first flow port 102 communicating with the fluid channel 101. At the other end of the rod 121 axially away from the fifth limiting part 122, there is a second flow port 1211 communicating with the fluid channel 101 and the first cavity 111. Thus, fluid can directly and centrally enter the fluid channel 101 from the first flow port 102 and flow out from the second flow port 1211, with minimal flow resistance, which enhances the fluid flow performance.

[0088] In an optional embodiment, the surface of the fifth limiting portion 122 facing away from the second elastic member 132 is inclined toward the second elastic member 132 along the axis of the first cavity 111 to form an inclined guiding surface, guiding the fluid to flow into the fluid channel 101 and improving the fluid flow performance.

[0089] In an optional embodiment, the fifth limiting part 122 is disposed around the rod 121 in the circumferential direction to ensure sufficient limiting.

[0090] like Figure 6 and Figure 7 As shown, the first valve stem 12 is further provided with a pressure relief hole 123, which connects the fluid channel 101 and the first cavity 111. Since the female connector 10 usually mates with the male connector 20, when the male connector 20 is continuously inserted into the first cavity 111 and pushes the first valve core 131 to move, the fluid between the male connector 20 and the inner wall of the first valve tube 11 is compressed, and the fluid pressure increases. Through the provision of the pressure relief hole 123, the high-pressure fluid can enter the fluid channel 101 or the first cavity 111 from the pressure relief hole 123 to release the pressure and facilitate the continuous insertion of the male connector 20 into the first cavity 111.

[0091] In a specific embodiment, a pressure relief hole 123 is provided on the rod body 121. The pressure relief hole 123 is radially through the rod body 121, so that fluid can directly enter the fluid channel 101 through the pressure relief hole 123.

[0092] In another specific embodiment, the pressure relief hole 123 is provided on the fifth limiting part 122. The pressure relief hole 123 is axially arranged along the rod body 121, so that the fluid passes through the pressure relief hole 123 along the first cavity 111 and enters the first cavity 111, and then enters the fluid channel 101 from the first cavity 111.

[0093] In a specific embodiment, the surface of the fifth limiting part 122 facing the third limiting groove 112 along the radial direction of the first valve stem 12 is set as an arc-shaped curved surface to fit against the inner wall of the first valve tube 11, thereby increasing the mating area. The arc-shaped curved surface can reduce wear and promote the reliability of the limiting.

[0094] Next, the structure of the male connector 20 will be described.

[0095] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in an optional embodiment, the male connector 20 includes a second valve core assembly 22, the second valve tube 21 has a second cavity 211 extending along its own axial direction, the second valve core assembly 22 is installed in the second cavity 211; the second valve tube 21 is inserted into the first cavity 111 and abuts against the first valve core 131; the second valve core assembly 22 abuts against the first valve stem 12.

[0096] The fluid connector 100 has an open state and an open state. In the open state, the second valve tube 21 can drive the first valve core 131 to move along the axial direction of the first valve tube 11 toward the fifth limiting part 122, so that the first valve stem 12 is inserted into the second valve tube 21. At this time, there is a gap between the first valve stem 12 and the second valve tube 21, and the fluid passage 101 communicates with the second cavity 211 through this gap, thus forming fluid flow. In the open state, the second valve core assembly 22 and the first valve tube 11 respectively form a seal with the second valve tube 21, and the first valve stem 12 and the first valve tube 11 respectively form a seal with the first valve core 131. That is, the male connector 20 and the female connector 10 each form a seal to prevent fluid leakage.

[0097] The second valve tube 21 can continuously push the first valve core 131 until the deformation limit of the second elastic element 132 is reached. When the second valve tube 21 loses the external force, the second elastic element 132 can push the first valve core 131 in the opposite direction through its own elastic force. Under the action of the elastic force, the first valve core 131 drives the second valve tube 21 to reset.

[0098] like Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, in an optional embodiment, the second valve core assembly 22 includes a second valve core 221 and a third elastic element 222. The second valve core 221 abuts against the first valve stem 12, and the third elastic element 222 connects the second valve core 221 and the end of the second valve tube 21 away from the second valve core 221. Thus, when the second valve tube 21 is continuously inserted into the first cavity 111, the first valve stem 12 can continuously extend into the second cavity 211 relative to the second valve tube 21, and the third elastic element 222 between the second valve tube 21 and the second valve core 221 undergoes elastic deformation. After the second valve tube 21 loses the external force, the third elastic element 222 exerts an elastic force on the second valve tube 21 to achieve the reset of the second valve tube 21. After the second valve tube 21 resets, the fluid connection is disconnected.

[0099] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in a specific embodiment, the inner wall of the second valve tube 21 is provided with a seventh limiting part 212 protruding radially, and the second valve core 221 is provided with a second mating part 2211 protruding radially outward. In the open state, the second valve core 221 can abut against the seventh limiting part 212 through the second mating part 2211 to achieve axial limiting of the second valve core 221.

[0100] In a specific embodiment, the seventh limiting portion 212 gradually increases in size along the radial dimension of the second valve tube 21 and along the axial direction of the first valve tube 11, moving away from the third elastic member 222. Correspondingly, the second mating portion 2211 gradually decreases in size along the radial dimension of the second valve core 221 and along its own axis, moving away from the third elastic member 222. The seventh limiting portion 212 forms an inclined second limiting surface, and the second mating portion 2211 forms an inclined second mating surface. The second limiting surface and the second mating surface fit together to increase the limiting area and facilitate the dispersion of force, reducing stress concentration.

[0101] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in an optional embodiment, when the fluid connector 100 is disconnected, the first valve tube 11 and the second valve core 221 respectively form a seal with the second valve tube 21, so that the male connector 20 disconnects from the female connector 10, and prevents fluid from leaking from the first cavity 111 to the second cavity 211.

[0102] like Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, in a specific embodiment, in the second valve core 221 and the second valve tube 21, at least the second valve core 221 is provided with a sealing element 40. When the fluid connector 100 is disconnected, along the radial direction of the male connector 20, the outer wall of the second valve core 221 is pressed against one side of the sealing element 40, and the inner wall of the second valve tube 21 is pressed against the other side of the sealing element 40, to ensure a seal between the second valve tube 21 and the second valve core 221. Exemplarily, the second valve core 221 is provided with the sealing element 40; or, both the second valve core 221 and the second valve tube 21 are provided with the sealing element 40.

[0103] In a specific embodiment, at least the first valve pipe 11 is provided with a sealing element 40 in both the second valve pipe 21 and the first valve pipe 11. In both the disconnected and connected states, the outer wall of the second valve pipe 21 is pressed against one side of the sealing element 40 radially along the male connector 20, while the inner wall of the first valve pipe 11 is pressed against the other side of the sealing element 40. Specifically, in the disconnected state of the fluid connector 100, the sealing element 40 ensures a seal between the second valve pipe 21 and the first valve pipe 11. That is, in the disconnected state, the first valve pipe 11 is provided with at least two sealing elements 40 spaced apart along its own axial direction. Part of the sealing element 40 is pressed between the first valve pipe 11 and the first valve core 131, while another part of the sealing element 40 is pressed between the first valve pipe 11 and the second valve pipe 21, preventing fluid leakage between the first valve pipe 11 and the second valve pipe 21 and facilitating the formation of a seal between the male connector 20 and the female connector 10. In the connected state, the sealing element 40 of the first valve pipe 11 is evenly pressed between the first valve pipe 11 and the second valve pipe 21, so that all fluid enters from the first pipe cavity 111 into the fluid channel 101 and from the fluid channel 101 into the second pipe cavity 211, without leaking from the first pipe cavity 111 into the second pipe cavity 211. For example, the first valve pipe 11 is provided with the sealing element 40; or, both the second valve pipe 21 and the first valve pipe 11 are provided with the sealing element 40.

[0104] In a specific embodiment, the sealing element 40 can be configured as a sealing ring, which can be installed by opening a sealing groove to effectively limit and assemble the sealing ring.

[0105] like Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 9As shown, in an optional embodiment, multiple second mating portions 2211 are provided, and these multiple second mating portions 2211 are spaced apart circumferentially along the second valve core 221. Any two adjacent second mating portions 2211 and the second valve tube 21 surround to form a third flow port 223. In the connected state, the second valve core 221 can disengage from the seventh limiting portion 212 under the movement of the second valve tube 21, thereby allowing the third flow port 223 to connect the second cavity 211 and the fluid channel 101. Thus, in the disconnected state of the fluid connector 100, the second valve core 221 can be limited to the second valve tube 21 through the second mating portions 2211; in the connected state of the fluid connector 100, the fluid in the fluid channel 101 can pass through the third flow port 223 and enter the second cavity 211, resulting in a simple structure that is easy to manufacture.

[0106] like Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 9 As shown, in a further embodiment, the second valve core 221 is provided with a plurality of second limiting arms 2212 spaced apart along its circumference. The second limiting arms 2212 are connected to the second mating part 2211 and extend axially along the second cavity 211. The second limiting arms 2212 are provided with a fifth limiting groove 22121, and one end of the third elastic member 222 is connected to the groove wall of the fifth limiting groove 22121. Thus, the provision of the fifth limiting groove 22121 facilitates the assembly of the third elastic member 222, so as to realize the radial and axial limiting of the third elastic member 222, improve the reliability of the assembly of the third elastic member 222, reduce the shaking of the third elastic member 222, and promote the stable movement of the second valve tube 21.

[0107] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, in a specific embodiment, the inner wall of the second valve pipe 21 is recessed inward to form a second assembly groove 213. The male connector 20 also includes a second limiting ring 23. The second limiting ring 23 is disposed in the second assembly groove 213 and extends out of the second assembly groove 213 to axially limit the third elastic member 222, so that the third elastic member 222 is limited between the groove wall of the third limiting groove 112 and the second limiting ring 23, thereby promoting the stable assembly of the third elastic member 222.

[0108] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0109] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A fluid connector, characterized in that, include: The female connector (10) includes a first valve pipe (11) having a first cavity (111), and the wall of the first valve pipe (11) has a limiting hole (115) communicating with the first cavity (111). The male connector (20) includes a second valve tube (21), which is movably inserted into the first cavity (111); the second valve tube (21) is provided with a first limiting part (214) protruding outward. The limiting structure (30) includes a limiting seat (31), a first limiting member (33), and a movable component (32); the limiting seat (31) and the movable component (32) are respectively sleeved on the first valve tube (11); a limiting space (301) is formed between the limiting seat (31) and the first valve tube (11), and the movable component (32) is movably disposed in the limiting space (301); the first limiting member (33) is movably disposed in the limiting hole (115) and the limiting space (301). The limiting structure (30) has a first state and a second state; in the first state, the first limiting member (33) is located inside the limiting hole (115) and extends out of the limiting hole (115), and along the axial direction of the limiting structure (30), the first limiting part (214) abuts against the first limiting member (33), and along the radial direction of the limiting structure (30), the first limiting member (33) is pressed between the movable component (32) and the first limiting part (214); in the second state, the movable component (32) moves away from the first limiting member (33) along the axial direction of the first valve pipe (11).

2. The fluid connector according to claim 1, characterized in that, The movable component (32) includes a limiting sleeve (321) and a first elastic element (322), which is connected between the first valve tube (11) and the limiting sleeve (321) along the axial direction of the first valve tube (11). In the first state, the limiting sleeve (321) is pressed against the surface of the first limiting member (33) located in the limiting space (301) under the action of the elastic force of the first elastic member (322); in the second state, the limiting sleeve (321) moves away from the first limiting member (33) along the axial direction of the first valve tube (11), and the first elastic member (322) undergoes elastic deformation.

3. The fluid connector according to claim 2, characterized in that, The limiting sleeve (321) has a first limiting groove (3211) on its surface facing the first limiting member (33), and the first limiting groove (3211) is formed by a radial recess along the limiting sleeve (321); In the first state, a portion of the structure of the first limiting member (33) is located in the first limiting groove (3211). Along the radial direction of the limiting structure (30), the groove wall of the first limiting groove (3211) presses against one side of the first limiting member (33) located in the limiting space (301).

4. The fluid connector according to claim 3, characterized in that, Along the axial direction of the limiting seat (31), the limiting sleeve (321) is provided with a guide section (3212) on the side near the first limiting member (33), and the guide section (3212) is connected to the groove edge of the first limiting groove (3211); Along the axis of the first valve tube (11), the guide section (3212) is gradually tapered away from the first elastic member (322), and along the radial direction of the first valve tube (11), the surface of the guide section (3212) facing the first limiting member (33) forms a guide slope.

5. The fluid connector according to claim 2, characterized in that, Along the radial direction of the first valve tube (11), the limiting seat (31) is provided with a second limiting part (311) protruding inward near the inner sidewall of the first limiting member (33); in the first state, along the axial direction of the first valve tube (11), the limiting sleeve (321) abuts against the surface of the second limiting part (311) facing the limiting sleeve (321).

6. The fluid connector according to claim 2, characterized in that, The first valve tube (11) has a limiting boss (116) protruding outward along its own radial direction, and the first elastic element (322) is connected between the limiting boss (116) and the limiting sleeve (321).

7. The fluid connector according to any one of claims 1 to 6, characterized in that, The first limiting part (214) includes a limiting section (2142) and a transition section (2141). In the first state, the limiting section (2142) is pressed against the first limiting member (33). Along the axial direction of the second valve pipe (21), the transition section (2141) is connected to the limiting section (2142) and is close to the first valve pipe (11) relative to the limiting section (2142). Along the axial direction of the second valve tube (21), the transition section (2141) gradually narrows from the limiting section (2142) toward the first valve tube (11) and forms a first inclined surface (21411), and the limiting section (2142) gradually narrows from the transition section (2141) toward the direction away from the first valve tube (11) and forms a second inclined surface (21421). The angle between the first inclined surface (21411) and the radial direction of the second valve tube (21) is greater than the angle between the second inclined surface (21421) and the radial direction of the second valve tube (21).

8. The fluid connector according to any one of claims 1 to 6, characterized in that, Along the radial direction of the first valve tube (11), the limiting seat (31) is provided with a third limiting part (312) protruding inward. In the second state, the third limiting part (312) is used to axially limit the first limiting member (33).

9. The fluid connector according to claim 8, characterized in that, The outer wall of the first valve tube (11) is recessed inward along its own radial direction to form a second limiting groove (117). The limiting seat (31) is provided with a fourth limiting part (313), which is connected to the side of the third limiting part (312) away from the limiting space (301) and is set at an angle to the third limiting part (312). The fourth limiting part (313) and the third limiting part (312) surround and form an accommodating space (302), which is connected to the second limiting groove (117). The limiting structure (30) further includes a second limiting member (34); the second limiting member (34) is disposed in the accommodating space (302) and the second limiting groove (117), and the third limiting part (312) and the fourth limiting part (313) abut against the second limiting member (34).

10. The fluid connector according to any one of claims 1 to 6, characterized in that, Along the radial direction of the first valve tube (11), the surface of the limiting seat (31) is provided with an outward protrusion to form an anti-slip protrusion; and / or, along the radial direction of the first valve tube (11), the surface of the limiting seat (31) is recessed inward to form an anti-slip groove (314). The female connector (10) further includes a first valve stem (12), a first valve core (131), and a second elastic element (132) installed in the first tube cavity (111); the first valve core (131) is provided with a first flow hole (1311) that extends through its own axial direction; one end of the first valve stem (12) passes through the first flow hole (1311), and the other end is provided with a fourth limiting part (313) that limits and cooperates with the inner tube wall of the first valve tube (11); along the axial direction of the first valve tube (11), the second elastic element (132) is connected between the fourth limiting part (313) and the first valve core (131); The fluid connector has an open state and an open state; In the first valve tube (11) and the first valve core (131), at least the first valve tube (11) is equipped with a seal (40). In the disconnected state, along the radial direction of the female connector (10), the inner wall of the first valve tube (11) is pressed against one side of the seal (40), and the outer wall of the first valve core (131) is pressed against the other side of the seal (40). In the connected state, along the radial direction of the female connector (10), the inner wall of the first valve tube (11) is pressed against the seal (40). On one side of the sealing element (40), the outer wall of the second valve tube (21) is pressed against the other side of the sealing element (40); and / or, in the first valve core (131) and the first valve stem (12), at least the first valve stem (12) is provided with a sealing element (40), in the open state, along the radial direction of the female connector (10), the inner wall of the first valve core (131) is pressed against one side of the sealing element (40), and the outer wall of the first valve stem (12) is pressed against the other side of the sealing element (40); The male connector (20) includes a second valve core (221) and a third elastic element (222). The second valve tube (21) has a second cavity (211) extending along its own axial direction. The second valve core (221) and the third elastic element (222) are respectively installed in the second cavity (211). Along the axial direction of the second valve tube (21), the third elastic element (222) is connected between the ends of the second valve core (221) and the second valve tube (21). The second valve core (221) abuts against the first valve stem (12). The second valve tube (21) abuts against the first valve core (131). In the second valve core (221) and the second valve tube (21), at least the second valve core (221) is provided with a seal (40). In the disconnected state, along the radial direction of the male connector (20), the outer wall of the second valve core (221) is pressed against one side of the seal (40), and the inner wall of the second valve tube (21) is pressed against the other side of the seal (40); and / or, in the second valve tube (21) and the first valve tube (11), at least the first valve tube (11) is provided with a seal (40). In the disconnected state and the connected state, along the radial direction of the male connector (20), the outer wall of the second valve tube (21) is pressed against one side of the seal (40), and the inner wall of the first valve tube (11) is pressed against the other side of the seal (40).

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