Threaded plug-in type one-way valve

Abstract

The utility model relates to the technical field of fluid control, in particular to a threaded plug-in type one-way valve which comprises a valve sleeve, a steel ball, a spring seat and a spring. Wherein the valve sleeve is of a tubular structure, and an inlet and an outlet are formed in the two sides of the valve sleeve respectively; the spring seat, the spring and the steel ball are all mounted in the valve sleeve; the spring seat is located on one side of the steel ball and supported between the spring seat and the steel ball, and the steel ball can overcome resistance of the spring to move under fluid pressure. When fluid enters from the inlet and exceeds a certain value, the steel ball overcomes the pressure of the spring, so that a channel for communicating the fluid is formed between the inlet and the outlet; when the pressure of the fluid is reduced, the steel ball is jacked back to the original position by the spring, the inlet and the outlet are cut off, and the fluid cannot pass through; and a pipe thread is arranged on the outer surface of the valve sleeve. The threaded plug-in type one-way valve is simple and compact in structure and can be conveniently installed in a hole to achieve one-way circulation of fluid.

Description

Technical Field

[0001] The present application relates to the field of fluid control technology, and in particular to a threaded cartridge-type one-way valve with a simple and compact structure and convenient installation. Background Art

[0002] In a hydraulic system, a one-way valve is a component used to control the direction of liquid flow, also known as a check valve or non-return valve. When pressure is applied to the valve from one direction, the valve will open to allow fluid to pass through, and when pressure is applied from the other direction, the valve will close to prevent fluid from passing through. Existing one-way valves are usually complex in structure, inconvenient to install, and prone to failure, affecting the normal operation of the hydraulic system. Therefore, developing a one-way valve with a simple structure and easy installation is of great significance to improving the stability and reliability of the hydraulic system. Summary of the invention

[0003] The purpose of the present application is to provide a threaded cartridge one-way valve, which has a simple and compact structure and can be easily installed in a hole to achieve one-way flow of fluid.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] The present application provides a threaded cartridge one-way valve, comprising: a valve sleeve, a steel ball, a spring seat and a spring; wherein the valve sleeve is a tubular structure, with an inlet and an outlet respectively arranged on both sides thereof, and the interior of the valve sleeve forms a first accommodating space connecting the inlet and the outlet; the spring seat, the spring and the steel ball are all installed in the first accommodating space; the spring seat is located on one side of the steel ball, the spring is installed in the spring seat and supported between the spring seat and the steel ball, and the steel ball can overcome the resistance of the spring and move under fluid pressure; when fluid enters from the inlet and the pressure exceeds a certain value, the steel ball overcomes the pressure of the spring, so that a channel for fluid communication is formed between the inlet and the outlet; when the fluid pressure becomes smaller, the spring pushes the steel ball back to its original position, the inlet and the outlet are cut off, and the fluid cannot pass through; a pipe thread is arranged on the outer surface of the valve sleeve.

[0006] Furthermore, the outer surface of the valve sleeve includes a first pipe section and a second pipe section, the pipe thread is arranged on the second pipe section, an annular installation groove is circumferentially provided on the first pipe section, and a sealing ring is installed in the installation groove.

[0007] Furthermore, the diameter of the second pipe section is smaller than that of the first pipe section.

[0008] Furthermore, a hole retaining ring is installed in the first accommodating space, and the hole retaining ring axially limits the installation position of the spring seat.

[0009] Furthermore, the first accommodating space includes a first hole segment, a second hole segment and a third hole segment connected in sequence, and the apertures of the first hole segment, the second hole segment and the third hole segment increase in sequence; the aperture of the first hole segment is smaller than the diameter of the steel ball, and the aperture of the second hole segment matches the outer diameter of the spring seat; the hole retaining ring is installed in the third hole segment.

[0010] Furthermore, a second accommodating space is formed inside the spring seat, an opening is provided on one side of the second accommodating space close to the steel ball, and a bottom plate is provided on the other side, the second accommodating space includes a spring guide section and a steel ball guide section that are connected, the spring is installed in the spring guide section, the aperture of the steel ball guide section is larger than the spring guide section and slightly larger than the diameter of the steel ball; at least one flow hole is provided on the bottom plate, and the flow hole is connected to the outlet.

[0011] Furthermore, a transition section is provided between the spring guide section and the steel ball guide section, and the transition section is designed to conform to the outer surface of the steel ball.

[0012] Furthermore, a CN co-infiltration layer is provided on the surface of the valve sleeve, and the thickness of the CN co-infiltration layer is 0.3-0.5 mm.

[0013] Furthermore, the spring seat is clearance-matched with the second hole segment, and an anti-rust layer is provided on the outer surface of the spring seat.

[0014] Furthermore, the stiffness coefficient K of the spring is 1.26 N / mm.

[0015] The beneficial effects of this application are:

[0016] 1. The structure is simple and compact, which is convenient for plug-in installation, saving space and improving the integration of the hydraulic system;

[0017] 2. The movement of the steel ball is controlled by the pressure of the fluid to achieve one-way oil flow, which is simple and reliable to operate;

[0018] 3. The coordinated use of the steel ball and the spring seat stabilizes the valve switching action and improves the stability of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 According to some embodiments of the present application, a structural schematic diagram of a threaded cartridge check valve is shown;

[0020] Figure 2 According to some embodiments of the present application, a schematic structural diagram of a valve sleeve is shown;

[0021] Figure 3-Figure 4 According to some embodiments of the present application, a schematic structural diagram of a spring seat is shown;

[0022] Figure 5 According to some embodiments of the present application, a structural schematic diagram of a valve opening state is shown;

[0023] Figure 6 According to some embodiments of the present application, a schematic diagram of the cooperation between a valve and a hole section to be installed is shown. DETAILED DESCRIPTION

[0024] The following is a more detailed description of the technical features and advantages of the present application in conjunction with the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0025] It should be noted that, in the description of the present application, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the importance of the technical features shown.

[0027] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The embodiment of the present application provides a threaded cartridge check valve, see Figure 1-Figure 5 , is a structural schematic diagram of the threaded cartridge check valve, which includes a valve sleeve 10, a steel ball 40, a spring seat 60 and a spring 50. The valve sleeve 10 is a tubular structure, and an inlet 11 and an outlet 12 are respectively arranged on both sides thereof, and a first accommodating space 10a that is connected is formed between the inlet 11 and the outlet 12. The steel ball 40, the spring 50 and the spring seat 60 are all installed in the above-mentioned first accommodating space 10a, the spring seat 60 is located on one side of the steel ball 40, and the spring 50 is installed inside the spring seat 60 and supported between the spring seat 60 and the steel ball 40. When the fluid enters from the inlet 11 and the pressure exceeds a certain value, the steel ball 40 overcomes the pressure of the spring 50, so that the inlet 11 and the outlet 12 are connected, and the fluid circulation is realized; when the pressure decreases, the spring 50 pushes the steel ball 40 back to its original position, and the connection between the inlet 11 and the outlet 12 is cut off, and the fluid cannot pass through.

[0029] Specifically, the first accommodating space 10a includes a first hole segment 16, a second hole segment 17 and a third hole segment 18, which are connected in sequence and have apertures that increase in sequence, wherein an inlet 11 is formed on one side of the first hole segment 16, and the aperture of the first hole segment 16 is smaller than the diameter of the steel ball 40, and the steel ball 40 is tightly abutted against an end of the first hole segment 16 that is away from the inlet 11 under the action of the inertial force of the spring 50, thereby blocking the flow of the fluid. The second hole section 17 is used to install the spring seat 60. The spring seat 60 forms a second accommodation space 60a inside. The second accommodation space 60a is provided with an opening connected to the inlet 11 at one end close to the steel ball 40 and a bottom plate 64 at the other end. Specifically, the second accommodation space 60a includes a steel ball guide section 61, a spring guide section 63 and a transition section 63 provided between the steel ball guide section 61 and the spring guide section 63. The spring 50 is installed in the spring guide section 63. The aperture of the spring guide section 63 is slightly larger than the outer diameter of the spring 50, and guides the movement of the spring 50. The aperture of the steel ball guide section 61 is larger than the diameter of the steel ball 40, so that the steel ball 40 can move freely inside the steel ball guide section 61, and the fluid can also pass through the gap between the steel ball 40 and the steel ball guide section 61, but it will not fall off from the valve sleeve 10. The transition section 62 can be designed in accordance with the external structure of the steel ball 40, and is used to limit the displacement of the steel ball 40, so that the movement of the steel ball 40 is limited between the first hole section 16 and the transition section 62. The elastic force of the spring 50 is precisely designed to adapt to the predetermined fluid pressure to open and close the valve. In this embodiment, the stiffness of the spring 50 is K=1.26N / mm, and the material of the spring 50 is treated with anti-corrosion so that it will not be worn out due to fluid corrosion during long-term operation.

[0030] The bottom plate 64 is encapsulated at the end of the spring seat 60 and is used to install the fixed end of the spring 50. The bottom plate 64 is provided with a flow hole 65 connected to the outlet 12. In this embodiment, four flow holes 65 are evenly provided on the bottom plate 64 for fluid circulation. Considering that the spring seat 60 will be immersed in the fluid during operation, the surface of the spring seat 60 is subjected to rust prevention treatment.

[0031] A retaining ring installation groove 19 is provided in the third hole section 18 of the valve seat 10, and a hole retaining ring 70 is installed in the retaining ring installation groove 19. The hole retaining ring 70 is used to limit the axial displacement of the spring seat 60. The apertures of the first hole section 16, the second hole section 17, and the third hole section 18 are designed to be increased in sequence, so as to facilitate the assembly of the steel ball 40, the spring 50, the spring seat 60, and the hole retaining ring 70 from the opening on one side of the third hole section 18; in order to facilitate the installation of the hole retaining ring 70, the hole retaining ring 70 can be made of an elastic material, such as polytetrafluoroethylene.

[0032] In this embodiment, by properly designing the elastic force of the spring 50, the opening and closing of the valve under a predetermined pressure can be controlled. Figure 5 , is a schematic diagram of the valve opening state after the steel ball 40 overcomes the resistance of the spring 50 under the fluid pressure. At this time, the fluid can enter from the inlet 11, flow through the gap between the steel ball 40 and the spring seat 60, and then flow out to the outlet 12 through the flow port 64, while the reverse fluid will be blocked by the steel ball 4. The coordinated use of the steel ball 40 and the spring seat 60 makes the valve switch action stable and reliable, and improves the stability of the hydraulic system.

[0033] In addition, the second pipe section 14 of the valve sleeve 10 is designed with a pipe thread structure to facilitate the plug-in installation of the one-way valve of this embodiment. Figure 6 , which is a schematic diagram of the structure of the jack installation of this embodiment. The internal design of the hole section 80 to be installed is a hole thread 81 that matches the second pipe section 14. Further, in order to achieve fluid sealing, an annular installation groove 15 is opened along the circumference of the first pipe section 13 of the valve sleeve 10, and a second retaining ring 20 and an elastic sealing ring 30 are installed in the installation groove 15, and the sealing ring 30 is used to achieve fluid sealing between the first pipe section 13 and the hole section 80 to be installed.

[0034] The surface of the valve sleeve 10 can be provided with a CN co-diffusion layer, i.e., carbonitriding, which is a technology that simultaneously infiltrates carbon and nitrogen into the metal surface at high temperature. Through this technology, a layer of carbonitride can be formed on the surface of the metal valve sleeve 10. To improve the hardness of the surface of the valve sleeve 10, thereby enhancing the wear resistance of the surface of the valve sleeve 10, making it less susceptible to wear when subjected to friction. Secondly, the co-diffusion layer can also improve the corrosion resistance of the valve sleeve 10, help it resist the erosion of various corrosive substances in the fluid, and extend its service life. In addition, the carbonitriding layer can also improve the fatigue life of the valve sleeve 10, so that it can maintain good performance under long-term repeated stress.

[0035] The threaded cartridge-type one-way valve of this embodiment has a simple and compact structure, is convenient to install in a hole, and is suitable for various hydraulic systems, especially for occasions with limited space and high requirements for integration.

[0036] In the description of this specification, the description with reference to the terms "some embodiments", "some examples", "exemplarily", "example", "preferably", or "further" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A threaded cartridge check valve, characterized in that: include: A valve sleeve, a steel ball, a spring seat and a spring; wherein the valve sleeve is a tubular structure, an inlet and an outlet are respectively arranged on both sides of the valve sleeve, and a first accommodating space communicating with the inlet and the outlet is formed inside the valve sleeve; the spring seat, the spring and the steel ball are all installed in the first accommodating space; the spring seat is located on one side of the steel ball, the spring is installed in the spring seat and supported between the spring seat and the steel ball, and the steel ball can overcome the resistance of the spring and move under fluid pressure; when the fluid enters from the inlet and the pressure exceeds a certain value, the steel ball overcomes the pressure of the spring, so that a channel for fluid communication is formed between the inlet and the outlet; When the fluid pressure decreases, the spring pushes the steel ball back to its original position, the inlet and the outlet are cut off, and the fluid cannot pass through; the surface of the valve sleeve is provided with a pipe thread; A second accommodating space is formed inside the spring seat, an opening is arranged on one side of the second accommodating space close to the steel ball, and a bottom plate is arranged on the other side, the second accommodating space includes a spring guide section and a steel ball guide section that are connected, the spring is installed in the spring guide section, the aperture of the steel ball guide section is larger than that of the spring guide section and larger than the diameter of the steel ball; at least one through-hole is arranged on the bottom plate, and the through-hole is connected to the outlet.

2. The threaded cartridge check valve according to claim 1, characterized in that: The outer surface of the valve sleeve includes a first pipe section and a second pipe section. The pipe thread is arranged on the second pipe section. An annular installation groove is provided on the first pipe section along the circumferential direction. A sealing ring is installed in the installation groove.

3. The threaded cartridge check valve according to claim 2, characterized in that: The second pipe section has a smaller diameter than the first pipe section.

4. The threaded cartridge check valve according to claim 1, characterized in that: A hole retaining ring is installed in the first accommodating space, and the hole retaining ring axially limits the installation position of the spring seat.

5. The threaded cartridge check valve according to claim 4, characterized in that: The first accommodating space includes a first hole segment, a second hole segment and a third hole segment which are connected in sequence, and the apertures of the first hole segment, the second hole segment and the third hole segment increase in sequence; the aperture of the first hole segment is smaller than the diameter of the steel ball, and the aperture of the second hole segment matches the outer diameter of the spring seat; the hole retaining ring is installed in the third hole segment.

6. The threaded cartridge check valve according to claim 1, characterized in that: A transition section is arranged between the spring guide section and the steel ball guide section, and the transition section is designed to conform to the outer surface of the steel ball.

7. The threaded cartridge check valve according to claim 1, characterized in that: A CN co-infiltration layer is arranged on the surface of the valve sleeve, and the thickness of the CN co-infiltration layer is 0.3-0.5 mm.

8. The threaded cartridge check valve according to claim 5, characterized in that: The spring seat is clearance-matched with the second hole section, and an anti-rust layer is provided on the outer surface of the spring seat.

9. The threaded cartridge check valve according to claim 1, characterized in that: The stiffness coefficient K of the spring is 1.26 N / mm.

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