Charging valve and valve device

Abstract

The application provides a kind of filling valve and valve device, filling valve includes valve body, valve core and one-way valve core, the first end and the second end are respectively at two ends of valve body, in the direction from the first end to the second end, installation cavity and one-way channel are sequentially arranged in valve body;Valve core is installed in installation cavity, valve core has openable and closable valve passage, and one-way channel is communicated under the condition that valve passage is opened;One-way valve core is movably arranged in one-way channel, one-way valve port is arranged on the side of one-way channel away from installation cavity, wherein, under the condition that fluid is input from the first end, fluid pushes one-way valve core to block one-way valve port, under the condition that fluid is input from the second end, fluid pushes one-way valve core to open one-way valve port. The technical scheme of the application solves the problem of poor stability and safety of the pipeline system containing the filling valve in the prior art.

Description

Technical Field

[0001] This application relates to the field of valve technology, and more specifically, to a filling valve and valve device. Background Technology

[0002] A charging valve is a widely used valve body in industrial equipment and systems to control the charging process of fluids or gases. Traditional charging valve designs typically allow bidirectional flow of the medium, enabling both charging and evacuation. While this design offers high flexibility, it also presents the problem of overcharging, which can affect the stability and safety of the piping system. For example, some air conditioning equipment uses charging valves to evacuate excess air. Because air conditioning equipment is pre-charged with sufficient refrigerant before leaving the factory or after maintenance by professional personnel, non-professionals may use the charging valve during maintenance, leading to the continuous addition of refrigerant and resulting in overcharging. Excessive refrigerant affects the stability and safety of the piping system. Utility Model Content

[0003] This application provides a filling valve and valve device to solve the problem that in existing pipeline systems that include a filling valve, the use of the filling valve to continuously fill the system with medium results in an excess of medium in the system, leading to poor stability and safety of the pipeline system.

[0004] To address the aforementioned problems, this utility model provides a filling valve, comprising a valve body, a valve core, and a one-way valve core. The valve body has a first end and a second end, respectively. From the first end to the second end, the valve body has a mounting cavity and a one-way channel arranged sequentially. The valve core is installed in the mounting cavity and has an openable / closable valve channel, which communicates with the one-way channel when open. The one-way valve core is movably disposed within the one-way channel, and the side of the one-way channel away from the mounting cavity has a one-way valve port. When fluid is input from the first end, the fluid pushes the one-way valve core to block the one-way valve port; when fluid is input from the second end, the fluid pushes the one-way valve core to open the one-way valve port.

[0005] Furthermore, the valve body includes a valve tube and a limiting structure. The mounting cavity, one-way channel, and limiting structure are all located inside the valve tube, and the limiting structure is located between the mounting cavity and the one-way channel. The limiting structure cooperates with the one-way valve core stop to limit the movement range of the one-way valve core.

[0006] Furthermore, the limiting structure is fixed to the inner wall of the valve tube. The limiting structure is annular, and the diameter of the inner hole of the limiting structure is smaller than the maximum radial dimension of the one-way valve core.

[0007] Furthermore, the outer wall of the one-way valve core has an axial notch. When the one-way valve core and the limiting structure abut, the axial notch and the inner hole of the limiting structure are connected to achieve the connection between the one-way channel and the mounting cavity; or, the limiting structure has a through axial channel, and the one-way channel is connected to the mounting cavity through the axial channel. When the one-way valve core and the limiting structure abut, the one-way valve core avoids the axial channel.

[0008] Furthermore, the limiting structure and the valve tube are an integral structure, or the limiting structure and the valve tube are separate structures, with the limiting structure fixed inside the valve tube by welding or interference fit.

[0009] Furthermore, the valve body includes a valve tube and a gasket. The mounting cavity and the one-way channel are both located inside the valve tube. The gasket is fixed to the valve tube and is located on the side of the one-way channel away from the mounting cavity. The gasket has a one-way valve port.

[0010] Furthermore, the valve pipe has a mounting groove, the radial dimension of which is larger than the radial dimension of the unidirectional channel, and the gasket is fixed in the mounting groove.

[0011] Furthermore, the gasket is fixed to the mounting groove by welding, or the gasket is fixed to the mounting groove by interference fit, or the end of the valve pipe has a riveted flange, and the gasket is fixed to the mounting groove by the riveted flange.

[0012] Furthermore, the end of the one-way valve core facing the one-way valve port has a tapered sealing surface, and the one-way valve port is cylindrical. When the sealing surface and the edge of the one-way valve port are in contact, an annular sealing line is formed at the contact position; or, the end of the one-way valve core facing the one-way valve port has a tapered sealing surface, and the one-way valve port is tapered. When the sealing surface and the inner wall of the one-way valve port are in contact, an annular sealing surface is formed at the contact position.

[0013] This utility model also provides a valve device, including a main pipe and the above-mentioned filling valve. The second end of the valve body of the filling valve is installed on the pipe wall of the main pipe and communicates with the inside of the main pipe. The first end of the valve body is provided with a detachable valve cap.

[0014] Applying the technical solution of this application, the one-way valve core is movably disposed within the one-way channel, facilitating its flexible movement as fluid flows in. When fluid enters from the first end, the one-way valve core is pushed to the closed position, blocking the one-way valve port to prevent fluid passage. When fluid enters from the second end, the fluid pushes the one-way valve core open, achieving one-way flow control of the fluid. This solution is suitable for situations where the filling valve is used for evacuation purposes, effectively preventing overfilling of the system due to personnel continuously filling the system with medium through the filling valve during operation, while not affecting the normal operation of the evacuation function, thereby improving the stability and safety of the pipeline system including the filling valve. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 A cross-sectional view of the filling valve provided in an embodiment of the present invention is shown;

[0017] Figure 2 A cross-sectional view of the valve body provided in an embodiment of the present invention is shown.

[0018] The above figures include the following reference numerals:

[0019] 10. Valve body; 11. Mounting cavity; 12. One-way passage; 121. One-way valve port; 13. Valve pipe; 131. Mounting groove; 14. Limiting structure; 15. Gasket;

[0020] 20. Valve core;

[0021] 30. One-way valve core; 31. Sealing surface. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0023] like Figure 1 , Figure 2 As shown, an embodiment of this application provides a filling valve, which includes a valve body 10, a valve core 20, and a one-way valve core 30. The two ends of the valve body 10 are a first end and a second end, respectively. In the direction from the first end to the second end, the valve body 10 has a mounting cavity 11 and a one-way channel 12 arranged sequentially. The valve core 20 is installed in the mounting cavity 11 and has an openable and closable valve channel. When the valve channel is open, it communicates with the one-way channel 12. The one-way valve core 30 is movably disposed in the one-way channel 12. The side of the one-way channel 12 away from the mounting cavity 11 has a one-way valve port 121. When fluid is input from the first end, the fluid pushes the one-way valve core 30 to block the one-way valve port 121. When fluid is input from the second end, the fluid pushes the one-way valve core 30 to open the one-way valve port 121.

[0024] Applying the technical solution of this application, the one-way valve core 30 is movably disposed within the one-way channel 12, facilitating flexible movement of the one-way valve core 30 as fluid flows in. When fluid enters from the first end, the one-way valve core 30 is pushed to the closed position, blocking the one-way valve port 121 to prevent fluid passage. When fluid enters from the second end, the fluid pushes the one-way valve core 30 open, achieving one-way flow control of the fluid. This solution is suitable for situations where the filling valve is used for evacuation purposes, effectively preventing the problem of excessive filling of the medium caused by personnel continuously filling the system through the filling valve during operation, while not affecting the normal operation of the evacuation function, thereby improving the stability and safety of the pipeline system including the filling valve.

[0025] like Figure 2 As shown, the valve body 10 includes a valve tube 13 and a limiting structure 14. The mounting cavity 11, the one-way channel 12, and the limiting structure 14 are all located within the valve tube 13, with the limiting structure 14 positioned between the mounting cavity 11 and the one-way channel 12. The limiting structure 14 engages with the one-way valve core 30 to limit its range of motion. In existing filling valves, if there is relatively high-pressure fluid at the lower end of the valve core during maintenance or valve core replacement (i.e., the equipment still has high pressure), there is a risk of the valve core flying out, posing a safety hazard to the operator and potentially damaging surrounding equipment or the environment. The limiting structure 14, through physical contact with the one-way valve core 30, restricts its movement distance, ensuring the relative position of the one-way valve core 30 within the valve body 10. This prevents the one-way valve core 30 from flying out from above due to fluid pressure fluctuations, achieving an explosion-proof effect, improving the reliability and safety of the filling valve, and reducing maintenance requirements.

[0026] In some embodiments, the limiting structure 14 is fixed to the inner wall of the valve tube 13. The limiting structure 14 is annular, and the diameter of the inner hole of the limiting structure 14 is smaller than the maximum radial dimension of the one-way valve core 30. The annular limiting structure 14 is fixedly connected to the inner wall of the valve tube 13, providing precise guidance and limiting for the one-way valve core 30, ensuring its sealing effect when closing the one-way valve port 121. The inner hole diameter of the limiting structure 14 is smaller than the maximum radial dimension of the one-way valve core 30, forming a physical limit to prevent the one-way valve core 30 from moving excessively, avoiding leakage and damage caused by excessive movement of the one-way valve core 30. It also prevents the one-way valve core 30 from flying out from above due to fluid pressure fluctuations, achieving an explosion-proof effect and improving the overall performance and safety of the filling valve.

[0027] In some embodiments, the outer wall of the one-way valve core 30 has an axial notch. When the one-way valve core 30 and the limiting structure 14 abut, the axial notch and the inner hole of the limiting structure 14 are connected to achieve communication between the one-way channel 12 and the mounting cavity 11. Alternatively, the limiting structure 14 has a through axial channel, through which the one-way channel 12 is connected to the mounting cavity 11. When the one-way valve core 30 and the limiting structure 14 abut, the one-way valve core 30 avoids the axial channel. When the one-way valve core 30 abuts against the limiting structure 14, the communication between the one-way channel 12 and the mounting cavity 11 is achieved through the axial notch or the axial channel, ensuring fluid communication between the valve core 20 and the one-way valve core 30, guaranteeing the smooth operation of the evacuation, and improving the reliability and practicality of the filling valve.

[0028] In some embodiments, the limiting structure 14 and the valve tube 13 are an integral structure. The integrated design of the limiting structure 14 and the valve tube 13 ensures the stability and strength of the limiting structure 14 through structural continuity, avoids limiting failure caused by weak connection, simplifies the assembly process of the filling valve, reduces the number of parts, improves production efficiency, reduces the manufacturing cost of the filling valve, and at the same time improves its structural compactness and reliability.

[0029] In some embodiments, the limiting structure 14 and the valve tube 13 are separate structures, with the limiting structure 14 fixed inside the valve tube 13 by welding or interference fit. The separate structure design provides the possibility of independent replacement and maintenance of the limiting structure 14. The fixing by welding or interference fit ensures the robustness and sealing of the limiting structure 14 inside the valve tube 13, preventing fluid leakage. While ensuring the performance of the filling valve, it improves its maintenance convenience and flexibility, and reduces the maintenance cost of long-term operation.

[0030] In some embodiments, the valve body 10 includes a valve tube 13 and a gasket 15. The mounting cavity 11 and the one-way passage 12 are both located within the valve tube 13. The gasket 15 is fixed to the valve tube 13 and located on the side of the one-way passage 12 away from the mounting cavity 11. The gasket 15 has a one-way valve port 121. The gasket 15 is fixed to the valve tube 13 and located on the side of the one-way passage 12 away from the mounting cavity 11. The one-way valve port 121 on it cooperates with the one-way valve core 30, realizing one-way flow control of the fluid, avoiding the problem of overfilling of the medium, enhancing the safety of the filling valve, and ensuring the safety of operators and equipment.

[0031] In some embodiments, the valve pipe 13 has a mounting groove 131, the radial dimension of which is larger than the radial dimension of the one-way channel 12, and the gasket 15 is fixed in the mounting groove 131. The design of the mounting groove 131 provides precise positioning and installation space for the gasket 15, ensuring its stability and reliability within the valve body 10. By being fixed in the mounting groove 131, the gasket 15 forms a tight fit with the one-way valve core 30, thereby achieving one-way flow control and enhancing the overall sealing and safety of the filling valve.

[0032] In some embodiments, the gasket 15 is fixed to the mounting groove 131 by welding, or by an interference fit, or the end of the valve tube 13 has a riveted flange, and the gasket 15 is fixed to the mounting groove 131 by the riveted flange. This solution provides multiple ways to fix the gasket 15 to the mounting groove 131, including welding, interference fit, and riveting, to adapt to different manufacturing conditions and usage environments. Welding improves the connection stability and reliability between the gasket 15 and the mounting groove 131, while interference fit and riveting provide detachable fixing methods, facilitating maintenance and replacement, improving flexibility, and allowing selection of appropriate fixing methods according to different manufacturing conditions and usage requirements, ensuring the overall performance and safety of the filling valve.

[0033] In some embodiments, the end of the one-way valve core 30 facing the one-way valve port 121 has a tapered sealing surface 31, and the one-way valve port 121 is cylindrical. When the sealing surface 31 and the edge of the one-way valve port 121 are in contact, an annular sealing line is formed at the contact position. Alternatively, the end of the one-way valve core 30 facing the one-way valve port 121 has a tapered sealing surface 31, and the one-way valve port 121 is tapered. When the sealing surface 31 and the inner wall of the one-way valve port 121 are in contact, an annular sealing surface is formed at the contact position. When the one-way valve core 30 moves to the closed position, the tapered sealing surface 31 forms a tight contact with the edge or inner wall of the one-way valve port 121, providing efficient sealing performance. Through the precise fit between the tapered sealing surface 31 and the one-way valve port 121, the sealing effect when the one-way valve core 30 blocks the one-way valve port 121 is ensured, while not affecting the normal operation of the evacuation function.

[0034] This application also provides a valve device, including a main pipe and the aforementioned filling valve. The second end of the valve body 10 of the filling valve is mounted on the pipe wall of the main pipe and communicates with the interior of the main pipe. A removable valve cap is provided at the first end of the valve body. When there is excess air in the main pipe, it can be extracted through the filling valve.

[0035] During the operation of the filling valve of this application, when fluid is mistakenly added, the fluid enters from the first end of the valve body 10, pushing the one-way valve core 30 to the closed position, blocking the one-way valve port 121, and preventing the fluid from continuing to flow, thereby stopping the filling function. At this time, even if the valve core 20 is in the open state, the fluid cannot enter the filling valve, avoiding the risk of overfilling. When it is necessary to evacuate the fluid, the fluid enters from the second end of the valve body 10, pushing the one-way valve core 30 to the open position, opening the one-way valve port 121, and the fluid can pass through the filling valve to achieve the evacuation function. In this process, the limiting structure 14 and the washer 15 work together to ensure the stable movement and relative position of the one-way valve core 30, avoiding the situation of overfilling of the medium. At the same time, the setting of the limiting structure 14 can prevent the one-way valve core 30 from flying out due to internal pressure when disassembling the valve core 20, ensuring the safety of operation. In addition, the precise fit between the conical sealing surface 31 and the one-way valve port 121 ensures the sealing effect of the filling valve when the one-way valve port 121 is closed, thereby improving the overall performance and reliability of the filling valve.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0038] 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.

[0039] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0040] 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, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0041] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A filling valve, characterized in that, The filling valve includes a valve body (10), a valve core (20), and a one-way valve core (30). The valve body (10) has a first end and a second end, respectively. In the direction from the first end to the second end, the valve body (10) has a mounting cavity (11) and a one-way channel (12) arranged sequentially. The valve core (20) is installed in the mounting cavity (11) and has an openable and closable valve channel. When the valve channel is open, the one-way valve core (30) is connected to the valve core (20). The one-way valve core (30) is movably disposed within the one-way channel (12), and the one-way channel (12) has a one-way valve port (121) on the side away from the mounting cavity (11). When fluid is input from the first end, the fluid pushes the one-way valve core (30) to block the one-way valve port (121), and when fluid is input from the second end, the fluid pushes the one-way valve core (30) to open the one-way valve port (121).

2. The filling valve according to claim 1, characterized in that, The valve body (10) includes a valve tube (13) and a limiting structure (14). The mounting cavity (11), the one-way channel (12) and the limiting structure (14) are all located inside the valve tube (13), and the limiting structure (14) is located between the mounting cavity (11) and the one-way channel (12). The limiting structure (14) and the one-way valve core (30) are in a stop-fitting cooperation to limit the movement range of the one-way valve core (30).

3. The filling valve according to claim 2, characterized in that, The limiting structure (14) is fixed to the inner wall of the valve tube (13). The limiting structure (14) is an annular structure. The diameter of the inner hole of the limiting structure (14) is smaller than the maximum radial dimension of the one-way valve core (30).

4. The filling valve according to claim 2, characterized in that, The outer wall of the one-way valve core (30) has an axial notch. When the one-way valve core (30) and the limiting structure (14) abut, the axial notch and the inner hole of the limiting structure (14) are connected to realize the connection between the one-way channel (12) and the mounting cavity (11). Alternatively, the limiting structure (14) has a through axial channel, and the one-way channel (12) is connected to the mounting cavity (11) through the axial channel. When the one-way valve core (30) and the limiting structure (14) abut, the one-way valve core (30) avoids the axial channel.

5. The filling valve according to claim 2, characterized in that, The limiting structure (14) and the valve pipe (13) are an integral structure, or, The limiting structure (14) and the valve tube (13) are separate structures. The limiting structure (14) is fixed inside the valve tube (13) by welding or interference fit.

6. The filling valve according to claim 1, characterized in that, The valve body (10) includes a valve tube (13) and a gasket (15). The mounting cavity (11) and the one-way channel (12) are both located inside the valve tube (13). The gasket (15) is fixed to the valve tube (13) and is located on the side of the one-way channel (12) away from the mounting cavity (11). The gasket (15) has the one-way valve port (121).

7. The filling valve according to claim 6, characterized in that, The valve pipe (13) has a mounting groove (131) with a radial dimension greater than that of the one-way channel (12), and the gasket (15) is fixed in the mounting groove (131).

8. The filling valve according to claim 7, characterized in that, The washer (15) is fixed to the mounting groove (131) by welding, or the washer (15) is fixed to the mounting groove (131) by interference fit, or the end of the valve pipe (13) has a riveted flange, and the washer (15) is fixed to the mounting groove (131) by the riveted flange.

9. The filling valve according to claim 1, characterized in that, The one-way valve core (30) has a tapered sealing surface (31) at one end facing the one-way valve port (121). The one-way valve port (121) is cylindrical. When the sealing surface (31) and the edge of the one-way valve port (121) are in contact, an annular sealing line is formed at the contact position. Alternatively, the one-way valve core (30) has a tapered sealing surface (31) at one end facing the one-way valve port (121). The one-way valve port (121) is tapered. When the sealing surface (31) and the inner wall of the one-way valve port (121) are in contact, an annular sealing surface is formed at the contact position.

10. A valve device, characterized in that, The device includes a main pipe and a filling valve as described in any one of claims 1 to 9, wherein the second end of the valve body portion (10) of the filling valve is mounted on the pipe wall of the main pipe and communicates with the interior of the main pipe, and the first end of the valve body portion is provided with a detachable valve cap.

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