A backflow prevention open valve

Abstract

The utility model relates to a kind of anti-return opening valves.The anti-return opening valve includes valve body, valve core assembly, medium flow passage, float ball and spring;The valve body is equipped with installation cavity;Valve core assembly is arranged in installation cavity, and hollow cavity is equipped in it;Medium flow passage is arranged in installation cavity, and can be communicated with hollow cavity, and the inlet and outlet of medium flow passage are respectively located at both ends of hollow cavity;Float ball is movably arranged in hollow cavity, for controlling the communication state of medium flow passage and hollow cavity;Spring is arranged in hollow cavity, and located above float ball.The scheme provided in the application can effectively prevent high-pressure medium from flowing into the refrigerant storage tank in reverse, thereby effectively avoiding the problem of abnormal pressure rise caused by reverse high-pressure impact on the tank body, avoiding deformation, leakage and even explosion of the tank body due to excessive pressure, and significantly improving the continuity, stability and safety of the fluorine addition process.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an anti-backflow opening valve. Background Technology

[0002] An opening valve is a core device specifically designed for precisely controlling the flow and shut-off of fluids (including gases and liquids) inside containers or pipelines. By flexibly adjusting the opening degree of the valve core, it can not only achieve on-demand fluid output to meet the needs of various application scenarios, but also effectively ensure its sealing and safety when the fluid is not in use, preventing leakage or other potential risks. It is currently widely used in fluid systems in many fields such as industry, medicine, and construction, becoming an indispensable and important component.

[0003] In the process of adding refrigerant to a car, the existing opening valve has a significant hidden danger due to the lack of an effective high-pressure backflow protection mechanism: when the car's circuit malfunctions and causes an excessive current surge, the refrigeration system will rapidly generate extremely high pressure. This high-pressure medium will flow directly back into the refrigerant storage tank, causing the pressure inside the tank to exceed the safety threshold in a short period of time. This can lead to problems such as tank deformation and leakage, and even cause an explosion. This not only damages the equipment and interrupts the refrigerant adding operation, but also poses a serious threat to the personal safety of the on-site operators, resulting in an extremely high safety hazard.

[0004] Therefore, there is an urgent need to design an anti-backflow opening valve that can effectively prevent high-pressure medium from flowing back into the refrigerant storage tank during the process of adding refrigerant to a car. This would prevent the abnormal pressure rise in the storage tank caused by the reverse high-pressure impact from the source, and avoid safety accidents such as deformation, leakage or even explosion of the tank due to excessive pressure. This would significantly improve the continuity, stability and safety of the refrigerant adding process. Summary of the Invention

[0005] To overcome the problems existing in related technologies, this application provides an anti-backflow opening valve. This anti-backflow opening valve can effectively prevent high-pressure medium from flowing back into the refrigerant storage tank during the process of adding refrigerant to a car, thereby avoiding the problem of abnormal pressure rise in the storage tank caused by reverse high-pressure impact from the source, and preventing safety accidents such as deformation, leakage or even explosion of the tank due to excessive pressure. It significantly improves the continuity, stability and safety of the refrigerant adding process.

[0006] This application provides an anti-backflow opening valve, including a valve body, a valve core assembly, a medium flow channel, a float, and a spring; the valve body has an installation cavity; the valve core assembly is disposed in the installation cavity, and the valve core assembly has a hollow cavity; the medium flow channel is disposed in the installation cavity and can communicate with the hollow cavity, and the inlet and outlet of the medium flow channel are respectively located at both ends of the hollow cavity, so that the medium must pass through the hollow cavity during flow; the float is movably disposed in the hollow cavity to control the communication state between the medium flow channel and the hollow cavity; the spring is disposed in the hollow cavity and located above the float.

[0007] In a preferred embodiment of this application, the valve core assembly includes a valve stem and a valve core; the valve stem is disposed within the mounting cavity and is movably connected to the valve body; the valve core is disposed at the bottom end of the valve stem and is fixedly connected to the valve stem.

[0008] In a preferred embodiment of this application, a sealing gasket is also included; the sealing gasket is disposed on the inner side of the bottom end of the valve body to achieve a seal when the valve body is connected to the tank, preventing the medium from leaking from the connection.

[0009] In a preferred embodiment of this application, the hollow cavity includes a wide-diameter end and a narrow-diameter end; the wide-diameter end and the narrow-diameter end are arranged sequentially from top to bottom and are interconnected; the diameter of the wide-diameter end is larger than the diameter of the float; the diameter of the narrow-diameter end is smaller than the diameter of the float.

[0010] In a preferred embodiment of this application, a chamfer is provided at the connection between the wide-diameter end and the narrow-diameter end.

[0011] In a preferred embodiment of this application, a handle and a pressure cap are also included; the handle is disposed at the top of the valve core assembly and connected to the valve core assembly, and is used to drive the valve core assembly to move; the pressure cap is disposed at the top of the valve body and connected to the valve body.

[0012] In a preferred embodiment of this application, the valve body includes a first valve body and a second valve body; the first valve body has an opening symmetrically arranged on both sides of the first valve body, which are used to connect a pipeline and a pressure gauge respectively; the second valve body is disposed at the lower end of the first valve body and is connected to the first valve body.

[0013] In a preferred embodiment of this application, a first sealing ring, a second sealing ring, a third sealing ring, and a fourth sealing ring are further included. The first sealing ring and the second sealing ring are respectively disposed on the upper and lower sides of the opening to achieve a seal between the first valve body and the valve core assembly. The third sealing ring is disposed on the inner wall of the second valve body to achieve a seal between the second valve body and the valve core assembly. The fourth sealing ring is disposed between the first valve body and the second valve body to achieve a seal between the first valve body and the second valve body.

[0014] In a preferred embodiment of this application, the float is a solid rubber sphere.

[0015] The technical solution provided in this application has the following beneficial effects: The anti-backflow opening valve of this application includes a valve body, a valve core assembly, a medium flow channel, a float, and a spring. By providing a hollow cavity within the valve core assembly that communicates with the medium flow channel, and by housing a float and a spring within the hollow cavity that control the communication state between the medium flow channel and the hollow cavity, the flow and cut-off of the medium can be precisely controlled, laying the structural foundation for the anti-backflow function. By setting the float, it can move up and down under the dynamic action of medium pressure and spring force, keeping the medium flow channel connected to the hollow cavity or cutting off the communication path between the medium flow channel and the hollow cavity by tightly abutting against the cavity wall, thus achieving the anti-backflow function. By setting the spring, a continuous and stable restoring force is provided to the float, ensuring that the float maintains a sealed posture when not in operation, enhancing the reliability of the anti-backflow function. By using the sealing gasket, along with the first, second, third, and fourth sealing rings, at the connection between the valve body and the tank, leakage of the medium inside the valve body and at the connection between the valve body and the tank can be effectively prevented, ensuring the normal operation of the anti-backflow opening valve. Compared with the prior art, the solution provided in this application, through the synergistic effect of various components, effectively achieves precise interception of the reverse flow of high-pressure medium, improving the safety and stability of automotive refrigerant refueling operations.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0018] Figure 1 This is a schematic diagram of the anti-backflow opening valve shown in the embodiments of this application; Figure 2 This is another structural schematic diagram of the anti-backflow opening valve shown in the embodiments of this application; Figure 3 This is another structural schematic diagram of the anti-backflow opening valve shown in the embodiments of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Valve body; 11. First valve body; 12. Second valve body; 13. Opening; 2. Valve core assembly; 21. Valve stem; 22. Valve core; 3. Medium flow channel; 4. Float; 5. Spring; 6. Hollow cavity; 61. Wide diameter end; 62. Narrow diameter end; 63. Chamfer; 7. Sealing gasket; 8. Handle; 9. Pressure cap; 10. First sealing ring; 101. Second sealing ring; 102. Third sealing ring; 103. Fourth sealing ring; 104. Piping. Detailed Implementation

[0020] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0021] 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 singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0022] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In the process of adding refrigerant to a car, the existing opening valve has a significant hidden danger due to the lack of an effective high-pressure backflow protection mechanism: when the car's circuit malfunctions and causes an excessive current surge, the refrigeration system will rapidly generate extremely high pressure. This high-pressure medium will flow directly back into the refrigerant storage tank, causing the pressure inside the tank to exceed the safety threshold in a short period of time. This can lead to problems such as tank deformation and leakage, and even cause an explosion. This not only damages the equipment and interrupts the refrigerant adding operation, but also poses a serious threat to the personal safety of the on-site operators, resulting in an extremely high safety hazard.

[0024] To address the aforementioned issues, this application provides an anti-backflow opening valve that effectively prevents high-pressure media from flowing back into the refrigerant storage tank during the refrigerant charging process. This prevents abnormal pressure increases in the storage tank caused by reverse high-pressure impacts, thus avoiding safety accidents such as tank deformation, leakage, or even explosion due to excessive pressure. This significantly improves the continuity, stability, and safety of the refrigerant charging process.

[0025] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0026] It should be noted that the medium in this application is a refrigerant, but it is not limited to refrigerants. Example

[0027] Please see Figures 1-3 The anti-backflow opening valve of this application includes a valve body 1, a valve core assembly 2, a medium flow channel 3, a float 4, and a spring 5. The valve core assembly 2, the medium flow channel 3, the float 4, and the spring 5 are all disposed within the valve body 1.

[0028] Specifically, the valve body 1 has an installation cavity, and the valve core assembly 2 is disposed within the installation cavity. For example, the valve body 1 includes a first valve body 11 and a second valve body 12. The second valve body 12 is disposed at the lower end of the first valve body 11 and connected to it, so that the first valve body 11 and the second valve body 12 together form the installation cavity. To facilitate connection to the pipeline 104 and real-time monitoring of the pressure within the pipeline, the first valve body 11 has two openings 13, each located on a side of the first valve body 11, for connecting the pipeline 104 and a pressure gauge. By connecting the pipeline 104, the medium can flow between the tank and the refrigeration system through the valve body 1; by connecting the pressure gauge, pressure changes inside the valve body 1 can be monitored in real time to detect abnormalities promptly. Preferably, the openings 13 are symmetrically arranged on both sides of the first valve body 11.

[0029] like Figure 1As shown, the anti-backflow opening valve further includes a first sealing ring 10, a second sealing ring 101, a third sealing ring 102, and a fourth sealing ring 103. The first sealing ring 10 and the second sealing ring 101 are respectively disposed on the upper and lower sides of the opening 13, with the first sealing ring 10 disposed in the groove of the valve core assembly 2 and the second sealing ring 101 disposed in the groove of the first valve body 11, for sealing between the first valve body 11 and the valve core assembly 2. The third sealing ring 102 is disposed on the inner wall of the second valve body 12, for sealing between the second valve body 12 and the valve core assembly 2. The fourth sealing ring 103 is disposed between the first valve body 11 and the second valve body 12, for sealing between the first valve body 11 and the second valve body 12. By setting the first sealing ring 10, the second sealing ring 101, the third sealing ring 102, and the fourth sealing ring 103, leakage of the medium inside the valve body 1 can be effectively prevented, ensuring the normal operation of the anti-backflow opening valve.

[0030] Furthermore, the valve core assembly 2 is provided with a hollow cavity 6. Specifically, the valve core assembly 2 includes a valve stem 21 and a valve core 22. The valve stem 21 is disposed in the mounting cavity and is movably connected to the valve body 1, allowing the valve stem 21 to move up and down within the valve body 1. The valve core 22 is disposed at the bottom end of the valve stem 21 and is fixedly connected to the valve stem 21, thereby driving the opening and closing of the valve core 22 through the movement of the valve stem 21, thus achieving precise control of the flow and cutoff of the medium. The medium flow channel 3 is disposed in the mounting cavity and can communicate with the hollow cavity 6. The inlet and outlet of the medium flow channel 3 are located at the two ends of the hollow cavity 6, respectively, so that the medium must pass through the hollow cavity 6 during flow, providing a structural basis for the backflow prevention function. The inlet is connected to the tank, and the outlet is connected to the pipeline 104.

[0031] Specifically, the hollow cavity 6 is disposed within the valve stem 21, and the float 4 is movably disposed within the hollow cavity 6 to control the communication state between the medium flow channel 3 and the hollow cavity 6. When in a non-flowing state (i.e., not connected to the tank) or in a high-pressure medium backflow state, the lower part of the float 4 abuts against the cavity wall of the hollow cavity 6, thereby achieving a seal between the float 4 and the cavity wall of the hollow cavity 6, cutting off the flow of the medium flow channel 3, and preventing the medium from flowing back into the tank through the hollow cavity 6 when not in use. Preferably, the float 4 is a solid rubber ball. The spring 5 is disposed within the hollow cavity 6 and located above the float 4, providing the float 4 with the force to reset and maintain the sealing state. When the medium flows normally, under the action of the medium pressure, the float 4 will overcome the elastic force of the spring 5 and move upward, opening the medium flow channel, so that the medium can flow from the tank into the refrigeration system to be filled; when a high pressure backflow occurs, the float 4 will move downward rapidly under the action of the spring 5 and the reverse high pressure medium, and closely abut against the cavity wall of the hollow cavity 6, thereby preventing the high pressure medium from flowing back into the refrigerant storage tank.

[0032] For example, such as Figure 1-3 As shown, the hollow cavity 6 includes a wide-diameter end 61 and a narrow-diameter end 62, which are arranged sequentially from top to bottom and are interconnected. The diameter of the wide-diameter end 61 is larger than the diameter of the float 4, thereby providing space for the float 4 to move. The diameter of the narrow-diameter end 62 is smaller than the diameter of the float 4, allowing the float 4 to abut against the cavity wall of the narrow-diameter end 62 when moving downwards. Furthermore, a chamfer 63 is provided at the connection between the wide-diameter end 61 and the narrow-diameter end 62, which can better adapt to the shape of the float 4 and further improve the sealing between the float 4 and the cavity wall of the hollow cavity 6.

[0033] To further prevent leakage of the medium from the connection between the valve body 1 and the tank, the anti-backflow opening valve of this application also includes a sealing gasket 7. The sealing gasket 7 is disposed on the inner side of the bottom end of the valve body 1 to achieve a seal when the valve body 1 is connected to the tank, thereby preventing leakage of the medium from the connection.

[0034] In addition, the anti-backflow opening valve also includes a handle 8 and a pressure cap 9. The handle 8 is located at the top of the valve core assembly 2 and is connected to the valve core assembly 2, used to drive the valve core assembly 2 to move. The pressure cap 9 is located at the top of the valve body 1 and is connected to the valve body 1, used to protect and fix the valve core assembly 2, and to limit and assist in sealing the valve stem 21.

[0035] Working principle: During the refrigerant charging process in a car, when the refrigeration system is operating normally, refrigerant flows from the refrigerant storage tank into the medium flow channel 3 through the valve body 1. When the medium comes into contact with the float 4, the medium pressure pushes the float 4 upward against the elastic force of the spring 5, thus connecting the medium flow channel 3 with the hollow cavity 6 (e.g., Figures 2-3 As shown), this allows the medium to flow into the hollow cavity 6 and enter the refrigeration system through pipe 104, enabling normal refrigerant charging. When an abnormality occurs in the vehicle's electrical circuit, causing a sudden surge in current, the refrigeration system rapidly generates extremely high pressure, and the high-pressure medium attempts to flow back into the refrigerant storage tank. At this time, the float 4 will rapidly move downwards under the combined action of the spring force of the spring 5 and the reverse high-pressure medium, and tightly abut against the wall of the narrow-diameter end 62 of the hollow cavity 6, cutting off the connection between the hollow cavity 6 and the medium flow channel 3 (e.g., Figure 1 As shown in the diagram, this effectively prevents the high-pressure medium from flowing back into the refrigerant storage tank, thus avoiding the problem of abnormal pressure rise in the storage tank caused by reverse high-pressure impact. This prevents safety accidents such as tank deformation, leakage, or even explosion due to excessive pressure. Throughout the process, the pressure changes inside the valve can be monitored in real time using a pressure gauge to ensure that the pressure remains within a safe range.

[0036] In this embodiment, the anti-backflow opening valve of this application includes a valve body, a valve core assembly, a medium flow channel, a float, and a spring. By providing a hollow cavity within the valve core assembly that communicates with the medium flow channel, and by housing a float and spring within the hollow cavity to control the communication state between the medium flow channel and the hollow cavity, the flow and cut-off of the medium can be precisely controlled, laying the structural foundation for the anti-backflow function. The float can move up and down under the dynamic action of medium pressure and spring force, maintaining communication between the medium flow channel and the hollow cavity, or by tightly abutting against the cavity wall to cut off the communication path between the medium flow channel and the hollow cavity, thus achieving the anti-backflow function. The spring provides a continuous and stable restoring force to the float, ensuring that the float maintains a sealed posture when not in operation, enhancing the reliability of the anti-backflow function. By using the sealing gasket, along with the first, second, third, and fourth sealing rings, at the connection between the valve body and the tank, leakage of the medium inside the valve body and at the connection between the valve body and the tank can be effectively prevented, ensuring the normal operation of the anti-backflow opening valve. Compared with the prior art, the solution provided in this application, through the synergistic effect of various components, effectively achieves precise interception of the reverse flow of high-pressure medium, improving the safety and stability of automotive refrigerant refueling operations. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0037] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., may be used here to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figure. It should be understood that spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device as described in the figure.

[0038] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A backflow prevention opening valve, characterized in that, It includes a valve body (1), a valve core assembly (2), a medium flow channel (3), a float (4), and a spring (5); The valve body (1) is provided with an installation cavity; The valve core assembly (2) is disposed in the mounting cavity, and the valve core assembly (2) is provided with a hollow cavity (6); The medium flow channel (3) is disposed in the mounting cavity and can be connected to the hollow cavity (6). The inlet and outlet of the medium flow channel (3) are located at the two ends of the hollow cavity (6), so that the medium must pass through the hollow cavity (6) when it flows. The float (4) is movably disposed within the hollow cavity (6) to control the communication state between the medium flow channel (3) and the hollow cavity (6); The spring (5) is disposed inside the hollow cavity (6) and is located above the float (4).

2. The anti-backflow opening valve according to claim 1, characterized in that, The valve core assembly (2) includes a valve stem (21) and a valve core (22); The valve stem (21) is disposed in the mounting cavity and is movably connected to the valve body (1); The valve core (22) is disposed at the bottom end of the valve stem (21) and is fixedly connected to the valve stem (21).

3. The anti-backflow opening valve according to claim 1, characterized in that, It also includes a sealing gasket (7); The sealing gasket (7) is disposed on the inner side of the bottom end of the valve body (1) to achieve a seal when the valve body (1) is connected to the tank, preventing the medium from leaking from the connection.

4. The anti-backflow opening valve according to claim 1, characterized in that, The hollow cavity (6) includes a wide-diameter end (61) and a narrow-diameter end (62); The wide-diameter end (61) and the narrow-diameter end (62) are arranged sequentially from top to bottom and are interconnected; The diameter of the wide end (61) is larger than the diameter of the float (4); The diameter of the narrow end (62) is smaller than the diameter of the float (4).

5. The anti-backflow opening valve according to claim 4, characterized in that, A chamfer (63) is provided at the connection between the wide diameter end (61) and the narrow diameter end (62).

6. The anti-backflow opening valve according to claim 1, characterized in that, It also includes a handle (8) and a pressure cap (9); The handle (8) is located at the top of the valve core assembly (2) and is connected to the valve core assembly (2) to drive the valve core assembly (2) to move; The pressure cap (9) is disposed at the top of the valve body (1) and is connected to the valve body (1).

7. The anti-backflow opening valve according to claim 1, characterized in that, The valve body (1) includes a first valve body (11) and a second valve body (12); The first valve body (11) is provided with an opening (13), which is symmetrically arranged on both sides of the first valve body (11) and is used to connect the pipeline (104) and the pressure gauge respectively. The second valve body (12) is disposed at the lower end of the first valve body (11) and is connected to the first valve body (11).

8. The anti-backflow opening valve according to claim 7, characterized in that, It also includes a first sealing ring (10), a second sealing ring (101), a third sealing ring (102), and a fourth sealing ring (103); The first sealing ring (10) and the second sealing ring (101) are respectively disposed on the upper and lower sides of the opening (13) to achieve sealing between the first valve body (11) and the valve core assembly (2); The third sealing ring (102) is disposed on the inner wall of the second valve body (12) to achieve a seal between the second valve body (12) and the valve core assembly (2); The fourth sealing ring (103) is disposed between the first valve body (11) and the second valve body (12) to achieve a seal between the first valve body (11) and the second valve body (12).

9. The anti-backflow opening valve according to claim 1, characterized in that, The float (4) is a solid rubber ball.

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