A fluid joint to prevent backflow

Abstract

The application relates to a backflow-preventing fluid joint. A spring is arranged in a male head assembly and a female head assembly, a valve core cooperates with the spring, when the male head assembly is connected with the female head assembly, the valve core moves and the spring is compressed, at this time, fluid channels in the male head assembly and the female head assembly are opened, fluid enters the fluid channels through a fluid inlet, and the fluid flows out through a fluid outlet. After the male head assembly and the female head assembly are disassembled and separated, the force on the spring disappears, the spring resets and pushes the valve core to move, the fluid channels are closed, the male head and the female head are in an embedded state after being separated, no fluid is overflowed, and backflow of the fluid is prevented. The male head assembly and the female head assembly connected in a first direction generate locking force in a second direction through a locking assembly, the connected male head assembly and the female head assembly cannot be disassembled, are more stable, can be disassembled by pressing the locking assembly, are more convenient to operate, and are convenient for butt joint of the joint. The butt joint core and the main body are limited and locked through a limiting groove and a clamping opening and a clamping block, and the joint is convenient to assemble.

Description

Technical Field

[0001] This application relates to the field of fluid connectors, and more particularly to a backflow-proof fluid connector. Background Technology

[0002] Fluid fittings (including but not limited to hydraulic fittings, pneumatic fittings, fuel fittings, and chemical medium conveying fittings) are critical connecting components widely used in industrial equipment, construction machinery, energy transmission, aerospace, and other fields. Their main function is to enable quick and reliable connection and disconnection between pipelines or between pipelines and equipment, ensuring a tight seal during connection to prevent fluid (liquid or gas) leakage.

[0003] However, after disassembly, existing connectors are prone to fluid overflow because the fluid on the male and female separation check valve cannot form a built-in state. This problem of minute fluid overflow after disassembly can have many adverse effects in certain application scenarios, such as: environmental pollution and safety hazards: For flammable, explosive, toxic, harmful, or corrosive fluids (such as fuel oil, hydraulic oil, and chemicals), even a small leak can lead to environmental pollution or pose significant safety hazards such as fire, explosion, or poisoning of personnel. Equipment contamination and maintenance difficulties: Leaked fluid may contaminate equipment surfaces, the working environment, or operators' clothing, increasing cleaning costs and workload. Precision equipment or clean areas are particularly sensitive to this type of contamination. Resource waste: The accumulation of minute leaks during frequent disassembly operations over a long period can result in a considerable waste of fluid media. Poor user experience: Dripping causes inconvenience to operators, affecting work efficiency and user experience. Utility Model Content

[0004] The technical problem this application aims to solve is that, after disassembly, existing connectors often result in fluid overflow because the fluid on the male and female separation valve cannot form a built-in state. To address these shortcomings of the prior art, this application provides a backflow-proof fluid connector.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is:

[0006] A backflow-preventing fluid connector is constructed, comprising a male connector assembly and a female connector assembly detachably connected to the male connector assembly. The female connector assembly is provided with at least one set of fluid inlets and female fluid channels corresponding to the fluid inlets. The male connector is provided with a number of fluid outlets corresponding to the fluid inlets and male fluid channels corresponding to the fluid outlets. The male connector assembly also includes a male valve core and a male check valve connected to the male valve core. The male check valve and the male valve core are provided with male springs. The female connector assembly includes a female valve core and a female spring connected to the female valve core. When the male connector assembly and the female connector assembly are connected, the male spring is compressed to open the male fluid channels, and the female spring is compressed to open the female fluid channels. When the male connector assembly and the female connector assembly are detached, the male spring returns to its original position to close the male fluid channels, and the female spring returns to its original position to close the female fluid channels.

[0007] Preferably, when the male connector assembly is connected to the female connector assembly, the female connector assembly applies a thrust to the male stop valve, the movement of the male stop valve compresses the male spring, and the male connector assembly applies a thrust to the female valve core, the movement of the female valve core compresses the female spring.

[0008] Preferably, the male valve core includes a male valve core limiting end, a male valve core through hole is provided on the male valve core limiting end, and a male valve core stop end is provided on the other end of the male valve core. The male stop valve is provided with a first inner wall and a second inner wall. When the male valve core stop end is subjected to force and enters the first inner wall of the male stop valve, the male fluid channel is opened. When the male valve core is subjected to force and enters the second inner wall of the male stop valve, the male fluid channel is closed.

[0009] Preferably, the male valve core has a male fluid groove on its side, the male valve core through hole is connected to the male fluid groove, and the male fluid groove has a male fluid groove slope at the end away from the male valve core through hole.

[0010] Preferably, the female valve core includes a female valve core limiting end, on which a female valve core through hole is provided, and at the other end of the female valve core is a female valve core outer wall. The female assembly also includes a female connector core, in which a first inner wall and a second inner wall are provided. When the outer wall of the female valve core is placed at the first inner wall of the female connector core, the female fluid channel is opened; when the outer wall of the female valve core is placed at the second inner wall of the female connector core, the female fluid channel is closed.

[0011] Preferably, the first inner wall of the female connector core and the second inner wall of the female connector core are connected by a first step of the female connector core. The first step of the female connector core is inclined. The female valve core is provided with a female valve core stop slope corresponding to the first step of the female connector core. The female valve core is provided with a female valve core spring groove, and one end of the female spring is placed in the female valve core spring groove.

[0012] Preferably, the male connector assembly further includes a male connector core, the male valve core, the male spring, and the male stop valve are placed inside the male connector core, the male connector core is provided with a second inner wall, and the female connector core is provided with a first outer wall. When the male connector assembly is connected to the female connector assembly, the female connector core is inserted into the male connector core, and the first outer wall of the female connector core contacts the second inner wall of the male connector core. The female connector core provides a thrust to the male stop valve, causing the male stop valve to move.

[0013] Preferably, the male connector assembly further includes a male connector body, a male connector channel is formed within the male connector body, a fluid outlet is formed at the first end of the male connector channel, and a male connector mating core is connected to the second end of the male connector channel. The female connector assembly further includes a female connector body, a female connector channel is formed within the female connector body, a fluid inlet is formed at the first end of the female connector channel, and a female connector mating core is connected to the second end of the female connector channel.

[0014] Preferably, the male connector body has a male connector limiting groove, the outer wall of the male connector mating core has a male connector locking block corresponding to the male connector limiting groove, and the male connector body also has a male connector locking slot. The male connector locking block moves along the male connector limiting groove and connects with the male connector locking slot. The female connector body has a female connector limiting groove, the outer wall of the female connector mating core has a female connector locking block corresponding to the female connector limiting groove, and the female connector body also has a female connector locking slot. The female connector locking block moves along the female connector limiting groove and connects with the female connector locking slot. The side of the male connector body near the fluid outlet is set as an inverted cone shape, and the side of the female connector body near the fluid inlet is set as an inverted cone shape.

[0015] Preferably, the fluid connector further includes a locking assembly, which includes a pressing part and a locking ring located below the pressing part. The locking ring has a locking through hole through which the female connector core passes and connects to the male connector core. The locking ring also has a locking assembly limiting block. The female connector body has a locking assembly slot corresponding to the locking assembly, and the locking assembly is inserted into the locking assembly slot. The male connector body has a male connector locking groove corresponding to the locking ring, and the locking ring is placed in the male connector locking groove. The locking assembly also includes a locking spring. When the locking spring provides a thrust to the pressing part so that the locking ring is placed in the male connector locking groove, the male connector assembly and the female connector assembly are not detachable. When pressure is applied to the pressing part to compress the locking spring, the locking ring moves out of the male connector locking groove, and the male connector assembly and the female connector assembly become detachable.

[0016] The beneficial effects of this application are as follows: By incorporating springs within the male and female connector assemblies, and with the valve core cooperating with the springs, when the male and female connector assemblies are connected, the valve core moves and compresses the springs. At this time, the fluid channels within the male and female connector assemblies open, allowing fluid to enter through the fluid inlet and exit through the fluid outlet. After the male and female connector assemblies are disassembled, a trap is formed within the fluid pipe. As the spring's force disappears, the spring resets, pushing the valve core to close the fluid channel, resulting in an internal state after separation of the male and female connectors, preventing fluid overflow and backflow. The male and female connector assemblies connected in the first direction generate a locking force in the second direction through a locking component, making disassembly impossible and more stable. Disassembly is achieved by simply pressing the locking component, making operation quicker and facilitating connector assembly. Meanwhile, the connecting core and the main body are limited and locked together by the limiting groove and the locking block, which facilitates the assembly of the connector. At the same time, the sealing ring is completely built into the male and female connector components, which can play a protective role and improve the airtightness of the connector, making the product more practical and versatile. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the present application will be further described below in conjunction with the accompanying drawings and embodiments. 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.

[0018] Figure 1 This is a three-dimensional structural diagram of the fluid connector according to a preferred embodiment of this application;

[0019] Figure 2 This is an exploded structural diagram of the fluid connector according to a preferred embodiment of this application;

[0020] Figure 3This is a cross-sectional structural diagram of the fluid connector according to a preferred embodiment of this application;

[0021] Figure 4 This is a three-dimensional structural diagram of the male connector assembly according to a preferred embodiment of this application;

[0022] Figure 5 This is an exploded view of the male connector assembly according to a preferred embodiment of this application;

[0023] Figure 6 A schematic diagram comparing the open and closed states of the fluid channel of the male connector assembly in a preferred embodiment of this application;

[0024] Figure 7 This is a cross-sectional structural diagram of the male head body of a preferred embodiment of this application;

[0025] Figure 8 This is a three-dimensional structural diagram of the male head body according to a preferred embodiment of this application;

[0026] Figure 9 This is a three-dimensional structural diagram of the male valve core according to a preferred embodiment of this application;

[0027] Figure 10 This is a schematic diagram of the axial structure of the male stop valve according to a preferred embodiment of this application;

[0028] Figure 11 This is a schematic diagram of another axial side structure of the male stop valve according to a preferred embodiment of this application;

[0029] Figure 12 This is a schematic diagram of the axial structure of the male connector core according to a preferred embodiment of this application;

[0030] Figure 13 This is a schematic diagram of another axial side structure of the male connector core according to a preferred embodiment of this application;

[0031] Figure 14 This is a three-dimensional structural diagram of the female connector assembly according to a preferred embodiment of this application;

[0032] Figure 15 This is an exploded view of the female head assembly according to a preferred embodiment of this application;

[0033] Figure 16 A schematic diagram comparing the open and closed states of the fluid channel of the female head assembly in a preferred embodiment of this application;

[0034] Figure 17 This is a cross-sectional structural diagram of the female head body according to a preferred embodiment of this application;

[0035] Figure 18 This is a three-dimensional structural diagram of the female head body according to a preferred embodiment of this application;

[0036] Figure 19 This is a schematic diagram of the axial structure of the female connector core according to a preferred embodiment of this application;

[0037] Figure 20 This is a cross-sectional structural diagram of the female connector core according to a preferred embodiment of this application;

[0038] Figure 21 This is a schematic diagram of the axial structure of the female valve core according to a preferred embodiment of this application;

[0039] Figure 22 This is a schematic diagram of another axial side structure of the female valve core according to a preferred embodiment of this application;

[0040] Figure 23 This is a three-dimensional structural diagram of the locking assembly according to a preferred embodiment of this application. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this application. Obviously, the described embodiments are some embodiments of this application, but not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application.

[0042] A preferred embodiment of this application provides a backflow prevention fluid connector; such as... Figures 1-3 As shown, the fluid connector includes a male connector assembly 20 and a female connector assembly 30 connected to the male connector assembly. One end of the female connector assembly has a fluid inlet 401, and one end of the male connector assembly has a fluid outlet 401. Both the male and female connector assemblies have fluid channels 402 connecting the fluid inlet and the fluid outlet. Fluid enters the female connector assembly from the fluid inlet, flows into the fluid channel of the female connector assembly, then flows into the fluid channel of the male connector assembly, and exits from the fluid outlet 400. The fluid connector also includes a locking component 10 that locks the connected male connector assembly 20 and female connector assembly 30. When the locking component is locked, the male and female connector assemblies are not detachable, and the fluid channels of the male and female connector assemblies are in communication. When the locking component is not locked, the male and female connector assemblies are detachable. This fluid connector can be applied to water pipe connections to connect two sections of liquid water pipes, and can also be applied to natural gas pipe connections to connect two sections of natural gas pipes. In other words, the fluid connector of this application can be applied to the connection of pipes containing flowing fluids such as liquids or gases.

[0043] Specifically, such as Figures 4-6As shown, the male connector assembly 20 includes a male connector body 200, with a hollow channel forming inside the male connector body 200. The channel extends through the male connector body, with a fluid outlet 400 at one end and a male connector mating core 201 at the other end. The male connector assembly is connected to the female connector assembly via the male connector mating core. A male connector valve core 202 is also provided between the male connector body and the male connector mating core, along with a male connector spring 203 sleeved on the male connector valve core and a male connector stop valve 204 sleeved outside the male connector spring. When the male connector assembly is connected to the female connector assembly, the female connector assembly pushes the male connector valve core to move and compresses the male connector spring. At this time, the fluid channel inside the male connector assembly opens, allowing fluid to flow. When the female connector assembly is disassembled from the male connector assembly, the male connector spring 203 resets and pushes the male connector stop valve 204 to close the fluid channel inside the male connector assembly, preventing fluid flow. It should be noted that multiple fluid channels can be set as needed, and each fluid channel is equipped with a fluid outlet and a male connector. The internal structure of each fluid channel is the same, so it will not be described again here.

[0044] Furthermore, such as Figures 4-13As shown, the male connector body 200 has a first male connector step 2002, a second male connector step 2003 corresponding to the first male connector step, and a third male connector step 2004 corresponding to the second male connector step. The radius of the first male connector step is smaller than the radius of the second male connector step, and the radius of the second male connector step is smaller than the radius of the third male connector step. The distances between the first male connector step, the second male connector step, and the third male connector step and the fluid outlet increase sequentially. One end of the male connector valve core 202 is provided with a male connector valve core limiting end 2020, which is located at the first male connector step 2002. The male valve core is provided with male fluid grooves 2002 on both sides, which are formed by the indentations on both sides of the male valve core. At the same time, a male valve core through hole 2021 is provided on the limiting end of the male valve core corresponding to the male fluid groove. A male fluid groove inclined surface 2023 is provided at the end of the male fluid groove away from the male valve core through hole 2021, and a male valve core stop end 2024 is provided at the other end of the male valve core. The male stop valve 204 is provided with a first inner wall 2042 and a second inner wall 2044 connected to the first inner wall. A male stop valve step 2043 is provided between the first inner wall and the second inner wall. Therefore, the radius of the first inner wall is larger than that of the second inner wall. The two ends of the male spring 203 are placed between the male stop valve step 2043 and the male valve core limiting end 2020. The male connector core 201 has a first inner wall 2013 and a second inner wall 2015. A step 2014 is provided between the first and second inner walls, so the radius of the first inner wall is smaller than that of the second inner wall. The outer wall of the male connector core has a sealing position 2011, and a sealing ring 50 is provided on the sealing position to increase the sealing performance between the outer wall of the male connector core and the inner wall of the male connector body. Meanwhile, the outer wall of the male connector body is provided with a male connector bayonet 2001, and the outer wall of the male connector mating core is provided with a male connector locking block 2010 corresponding to the male connector bayonet. Simultaneously, the inner wall of the male connector body is provided with a male connector limiting groove 2005 corresponding to the male connector locking block. When the male connector mating core is inserted into the male connector body, the male connector locking block is inserted along the male connector limiting groove 2005, thereby preventing the male connector mating core from rotating. Continuing insertion until the male connector locking block is inserted into the male connector bayonet allows the male connector mating core to be connected to the male connector body. After connection, the male connector valve core, male connector spring, and male connector stop valve are all housed within the male connector body. Furthermore, the outer wall of the male connector body 200 is also provided with multiple sets of male connector fixing parts 2000. These fixing parts have an inverted conical design, making them difficult to remove once locked in the installation position.

[0045] During assembly of the male connector assembly 20 of this application, the male connector valve core 202 is first inserted into the male connector body 200, so that the limiting end 2020 of the male connector valve core is placed at the first step 2002 of the male connector. Then, the male connector spring 203 is sleeved on the male connector valve core, and the male connector stop valve 204 is sleeved on the outside of the male connector spring. During the insertion process, the water-stopping end 2024 of the male connector valve core is placed at the second inner wall 2044 of the male connector stop valve. At the same time, both ends of the male connector spring are in contact with the limiting end 2020 of the male connector valve core and the step 2043 of the male connector stop valve, respectively. Then, the male connector core 201 is inserted into the outer wall of the male stop valve. During the insertion process, the male connector locking block 2010 is inserted along the male connector limiting groove 2005 until the male connector locking block 2010 is inserted into the male connector slot 2001. At this time, the male connector assembly is completed. After the assembly, the male connector core sealing position 2011 is covered with a sealing ring 50 and placed at the second step 2003 of the male connector. At the same time, the male connector stop valve limiting end 2040 is placed at the male connector core step 2014. The male connector stop valve can move within the second inner wall 2015 of the male connector core. During the movement, when the male connector valve core water stop end 2024 enters the first inner wall 2042 of the male connector stop valve, the fluid channel in the male connector assembly is opened. At this time, the fluid can enter the first inner wall of the male connector stop valve through the second inner wall of the male connector stop valve and enter the male connector valve core through hole 2021 through the male connector fluid groove 2022 and then flow out through the fluid outlet 400. Therefore, the fluid channel of the male connector assembly includes the space formed between the male connector fluid groove 2022 and the first inner wall of the male connector check valve. The fluid channel of the male connector assembly is large, and the fluid flow rate is greater.

[0046] Furthermore, such as Figures 14-22 As shown, the female connector assembly 30 includes a female connector body 300, with a hollow channel formed inside the female connector body 300. The channel extends through the female connector body, with a fluid inlet 401 at one end and a female connector mating core 301 at the other end, connecting the female connector assembly to the male connector assembly. A female connector valve core 302 and a female connector spring 303 connected to the female connector valve core are also provided between the female connector body and the female connector mating core. When the male connector assembly is connected to the female connector assembly, the male connector assembly pushes the female connector valve core to move and compress the female connector spring, opening the fluid channel within the female connector assembly to allow fluid flow. When the female connector assembly is disassembled from the male connector assembly, the female connector spring 303 resets and pushes the female connector valve core to close the fluid channel within the female connector assembly, preventing fluid flow. The amount of fluid in the female connector assembly can be the same as that in the male connector assembly, and each set of fluid channels in the female connector assembly corresponds to one set of fluid channels in the male connector assembly.

[0047] Furthermore, such as Figures 14-22As shown, the female connector body has a first step 3002, a second step 3003, and a third step 3004. The radius of the first step is smaller than that of the second step, which is smaller than that of the third step. The distances between the first, second, and third steps and the fluid outlet increase sequentially. A sealing position 301 is provided on the outer wall of the female connector core 301, with a sealing ring 50 inside to increase the sealing between the female connector core and the female connector body. The female connector core has a first inner wall 3013 and a second inner wall 3014. The radius of the first inner wall is larger than that of the second inner wall, and the first and second inner walls are connected by the first step 3014. The first step is inclined. The female valve core 302 is provided with a female valve core limiting end 3020 located on the first inner wall of the female valve core mating core. The female valve core limiting end is provided with a female valve core through hole 3021. At the same time, the other end of the female valve core is provided with a sealing valve core outer wall 3025. The female valve core outer wall is provided with a female valve core sealing groove 3023, and a sealing ring is provided inside. The female valve core limiting end is provided with a female valve core spring groove 3024. The two ends of the female valve core spring are respectively placed between the female valve core spring groove 3024 and the first step 3002 of the female valve core. The female valve core spring is subjected to force. During compression, the female valve core moves. When the outer wall of the female valve core moves into the first inner wall 3013 of the female connector core, the fluid channel within the female assembly opens because the radius of the first inner wall of the female connector core is larger than that of the outer wall of the female valve core. Fluid flows in from the fluid inlet, through the through hole of the female valve core, and then into the male assembly through the fluid channel. When the spring returns to its original position, it pushes the female valve core to move, pushing the outer wall of the female valve core into the second outer wall of the female connector core. At this point, the fluid channel within the female assembly closes, and fluid cannot flow within the fluid assembly. To facilitate the female valve core's movement from the first outer wall of the female connector core to the second outer wall of the female connector core, a female stop slope is provided on the female valve core, corresponding to the first step of the female connector core, to facilitate the female valve core closing the valve body channel. Meanwhile, the outer wall of the female connector body is provided with a female connector bayonet 3001, and the outer wall of the female connector core is provided with a female connector locking block 3010 corresponding to the female connector bayonet. At the same time, the inner wall of the female connector body is provided with a female connector limiting groove 3005 corresponding to the female connector locking block. When the female connector core is inserted into the female connector body, the female connector locking block is inserted along the female connector limiting groove 3005, thereby preventing the female connector core from rotating. Continue to insert until the female connector locking block is inserted into the female connector bayonet to connect the female connector core to the female connector body. After connection, the female connector valve core and the female connector spring are both placed inside the female connector body. At the same time, multiple sets of female connector fixing parts 3000 are also provided on the outer wall of the female connector body 300. The female connector fixing parts are designed with an inverted cone shape, so that they are not easy to pull out after being locked into the installation position.

[0048] During assembly of the female connector assembly 30 of this application, the female connector valve core 302 is first inserted into the female connector mating core 301, then the female connector spring 303 is inserted into the female connector mating core, and finally the female connector mating core is inserted into the female connector body 300. During insertion, the female connector locking block 3010 is inserted along the female connector limiting groove 3005 until it engages within the female connector locking slot 3001. At this point, the female connector assembly is complete. After assembly, the female connector assembly has a sealing ring 50 on the outer sleeve of the sealing position 3011 of the female connector core and is positioned at the second step 3003 of the female connector. At the same time, the two ends of the female connector spring are respectively positioned between the first step 3002 of the female connector and the spring groove 3024 of the female connector valve core. The female connector valve core can move within the first inner wall 3013 of the female connector core. During the movement, when the outer wall 3025 of the female connector valve core enters the first inner wall 3013 of the female connector core, the fluid channel in the female connector assembly opens. At this time, the fluid can enter the first outer wall of the female connector core through the fluid inlet 401 and enter the fluid channel through the through hole 3021 of the female connector valve core, and then flow into the male connector assembly. Therefore, the fluid channel of the female connector assembly is formed by the space within the first inner wall of the female connector core and the second inner wall of the female connector core. When the outer wall 3025 of the female connector valve core moves to the second inner wall 3015 of the female connector core, the fluid channel in the female connector assembly closes.

[0049] Furthermore, to facilitate the connection between the male and female connector assemblies, the female connector core 301 is provided with a first outer wall 3016, and the male connector core is provided with a second inner wall corresponding to the first outer wall of the female connector core. When the male and female connector assemblies are connected, the first outer wall of the female connector core contacts the second inner wall of the male connector core, and at the same time, the male valve core contacts the female connector. The male valve core 202 pushes the female valve core 302 to move and compress the female spring 303, and pushes the outer wall 3025 of the female valve core into the first inner wall 3013 of the female connector core. At this time, the fluid channel of the female connector assembly is opened. The female connector pushes the female stop valve 204 to move and compresses the male spring 203. After the female stop valve moves, the male valve core's stop end 2024 is placed inside the first inner wall 2042 of the male stop valve. At this time, the fluid channel of the male assembly is opened, and fluid can enter the fluid channel of the female assembly through the fluid inlet, pass through the through hole of the female valve core, and then enter the fluid channel of the male assembly. After passing through the through hole of the male valve core, it is discharged through the fluid outlet, thus opening the fluid channel. When the male assembly and the female assembly are disassembled, the male spring returns to its original position and pushes the male stop valve to move, causing the male valve core's stop end 2024 to enter the second inner wall of the male stop valve, closing the fluid channel in the male assembly. At the same time, the female spring returns to its original position and pushes the outer wall of the female valve core into the second inner wall of the female connector, closing the fluid channel of the female assembly. To facilitate locking and disassembling the male and female connectors, the fluid connector also includes a locking component 10. The locking component includes a pressing part 100 and a locking ring 102 located below the pressing part. The locking ring has a locking through hole 103. A locking component slot 3006 is provided on the female connector body corresponding to the locking component. Before assembling the female connector, the locking component is first inserted into the female connector body and limited by the locking component limiting block 104. Then, after the male connector is inserted into the female connector, the locking spring 101 returns to its original position. The upward thrust of the locking ring causes it to enter the locking groove 2012 of the male connector assembly, thus achieving the connection and locking of the male and female connector assemblies. During disassembly, applying pressure to the pressing part compresses the locking spring, causing the locking ring to slide out of the locking groove of the male connector assembly, thereby separating the male and female connector assemblies. The operation is simple, and after separation, the valve cores in the male and female connector assemblies reset to close the fluid passage, preventing fluid overflow. After interception, the fluid forms an internal state without overflow, and the airtightness is stable. The operation is quick and convenient for docking.

[0050] It should be understood that this application has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this application. Furthermore, based on the teachings of this application, these features and embodiments can be modified to suit specific circumstances and materials without departing from the spirit and scope of this application. Therefore, this application is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this application.

Claims

1. A backflow-preventing fluid connector, comprising a male connector assembly and a female connector assembly detachably connected to the male connector assembly, wherein the female connector assembly is provided with at least one set of fluid inlets and female fluid channels corresponding to the fluid inlets, and the male connector is provided with a number of fluid outlets corresponding to the fluid inlets and male fluid channels corresponding to the fluid outlets, characterized in that: The male connector assembly also includes a male valve core and a male stop valve connected to the male valve core. The male stop valve and the male valve core are equipped with a male spring. The female connector assembly includes a female valve core and a female spring connected to the female valve core. When the male connector assembly is connected to the female connector assembly, the male spring is compressed to open the male fluid channel, and the female spring is compressed to open the female fluid channel. When the male connector assembly is disassembled from the female connector assembly, the male spring returns to its original position to close the male fluid channel, and the female spring returns to its original position to close the female fluid channel.

2. The fluid connector according to claim 1, characterized in that: When the male connector assembly is connected to the female connector assembly, the female connector assembly applies a thrust to the male stop valve, the male stop valve moves and compresses the male spring, and the male connector assembly applies a thrust to the female valve core, the female valve core moves and compresses the female spring.

3. The fluid connector according to claim 2, characterized in that: The male valve core includes a male valve core limiting end, which is provided with a male valve core through hole. The other end of the male valve core is provided with a male valve core stop end. The male stop valve is provided with a first inner wall and a second inner wall. When the male valve core stop end is subjected to force and enters the first inner wall of the male stop valve, the male fluid channel is opened. When the male valve core is subjected to force and enters the second inner wall of the male stop valve, the male fluid channel is closed.

4. The fluid connector according to claim 3, characterized in that: The male valve core has a male fluid groove on its side, the male valve core through hole is connected to the male fluid groove, and the male fluid groove has a male fluid groove slope at the end away from the male valve core through hole.

5. The fluid connector according to claim 2, characterized in that: The female valve core includes a female valve core limiting end, on which a female valve core through hole is provided. The other end of the female valve core is provided with a female valve core outer wall. The female assembly also includes a female connector core, in which a first inner wall and a second inner wall are provided. When the outer wall of the female valve core is placed at the first inner wall of the female connector core, the female fluid channel is opened. When the outer wall of the female valve core is placed at the second inner wall of the female connector core, the female fluid channel is closed.

6. The fluid connector according to claim 5, characterized in that: The first inner wall of the female connector core and the second inner wall of the female connector core are connected by a first step of the female connector core. The first step of the female connector core is inclined. The female valve core is provided with a female valve core stop inclined surface corresponding to the first step of the female connector core. The female valve core is provided with a female valve core spring groove, and one end of the female spring is placed in the female valve core spring groove.

7. The fluid connector according to claim 5, characterized in that: The male connector assembly also includes a male connector core, and the male valve core, male spring, and male stop valve are placed inside the male connector core. The male connector core is provided with a second inner wall, and the female connector core is provided with a first outer wall. When the male connector assembly is connected to the female connector assembly, the female connector core is inserted into the male connector core, and the first outer wall of the female connector core contacts the second inner wall of the male connector core. The female connector core provides a thrust to the male stop valve, causing the male stop valve to move.

8. The fluid connector according to claim 7, characterized in that: The male connector assembly also includes a male connector body, within which a male connector channel is formed. A fluid outlet is formed at the first end of the male connector channel, and a male connector mating core is connected to the second end of the male connector channel. The female connector assembly also includes a female connector body, within which a female connector channel is formed. A fluid inlet is formed at the first end of the female connector channel, and a female connector mating core is connected to the second end of the female connector channel.

9. The fluid connector according to claim 8, characterized in that: The male connector body has a male connector limiting groove inside, and a male connector locking block is provided on the outer wall of the male connector mating core corresponding to the male connector limiting groove. The male connector body also has a male connector locking slot. The male connector locking block moves along the male connector limiting groove and connects with the male connector locking slot. The female connector body has a female connector limiting groove inside, and a female connector locking block is provided on the outer wall of the female connector mating core corresponding to the female connector limiting groove. The female connector body also has a female connector locking slot. The female connector locking block moves along the female connector limiting groove and connects with the female connector locking slot. The side of the male connector body near the fluid outlet is set as an inverted cone shape, and the side of the female connector body near the fluid inlet is set as an inverted cone shape.

10. The fluid connector according to claim 8, characterized in that: The fluid connector further includes a locking assembly, which includes a pressing part and a locking ring located below the pressing part. The locking ring has a locking through hole through which the female connector core passes and connects to the male connector core. The locking ring also has a locking assembly limiting block. The female connector body has a locking assembly slot corresponding to the locking assembly, and the locking assembly is inserted into the locking assembly slot. The male connector body has a male connector locking groove corresponding to the locking ring, and the locking ring is placed in the male connector locking groove. The locking assembly also includes a locking spring. When the locking spring provides a thrust to the pressing part so that the locking ring is placed in the male connector locking groove, the male connector assembly and the female connector assembly are not detachable. When pressure is applied to the pressing part to compress the locking spring, the locking ring moves out of the male connector locking groove, and the male connector assembly and the female connector assembly become detachable.

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