A one-way valve assembly

Abstract

The utility model relates to a one -way valve assembly, including valve body, the adapter and the valve element assembly of setting in valve body end part, the valve element assembly sets up in the valve body, the adapter includes first main part and second main part, and the second main part and valve body sleeve, first main part includes first connecting hole and second connecting hole, along the axial direction of first main part, first connecting hole and second connecting hole all penetrate first main part, define the plane perpendicular to valve body axis as first plane, first main part includes cylinder section, the projection of cylinder section on first plane is circular. The one -way valve assembly of the application, through design the projection of adapter's cylinder section on first plane is circular, the traditional "8" character structure of valve body end part is optimized as circular opening structure. Only needs to adopt circular sealing cover when leak hunting can close two ports simultaneously, and the leak hunting operation process of simplifying leakproofness.

Description

Technical Field

[0001] This application relates to the field of fluid control technology, specifically to a one-way valve assembly applied to an air conditioning system. Background Technology

[0002] In air conditioning refrigeration systems, there are strict requirements for the sealing performance of check valves. Therefore, check valves need to be leak-tested for sealing during the manufacturing process or before use.

[0003] In related technologies, the valve body employs a figure-eight stamped port structure at both ends. However, the figure-eight flattened port has a complex and irregular shape, requiring specific sealing measures to be applied to each of the two independent figure-eight ports during leak detection. This results in numerous sealing points and a complex leak detection operation. Furthermore, leak detection is even more complex for the middle fitting section of the figure-eight structure, making it difficult to meet the quality control requirements of modern mass production. Utility Model Content

[0004] This application provides a one-way valve assembly that facilitates leak detection.

[0005] A one-way valve assembly includes a valve body, an adapter disposed at the end of the valve body, and a valve core assembly. The valve core assembly is disposed within the valve body. The adapter includes a first main body and a second main body, the second main body being sleeved with the valve body. The first main body includes a first connecting hole and a second connecting hole. Along the axial direction of the first main body, both the first connecting hole and the second connecting hole penetrate the first main body. A plane perpendicular to the axis of the valve body is defined as a first plane. The first main body includes a cylindrical section, the projection of which onto the first plane is circular.

[0006] The one-way valve assembly of this application optimizes the traditional figure-eight structure at the valve body end into a circular opening structure by designing the projection of the cylindrical section of the adapter onto the first plane as a circle. During leak detection, only a circular sealing cap is needed to simultaneously close both ports, simplifying the leak detection process. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of a one-way valve structure related to the technology. Figure 2 A perspective view of the one-way valve and adapter provided by this utility model; Figure 3 A front view of the one-way valve and adapter provided by this utility model; Figure 4 for Figure 3 Top view of the transfer connector; Figure 5 for Figure 3 Front view of the transfer connector; Figure 6 Top view when the inner diameters of the first and second connecting holes are equal; Figure 7 Top view when the inner diameter of the first connecting hole is larger than the inner diameter of the second connecting hole; Figure 8 This is a front view of the adapter with a protrusion. Figure 9 A top view of the adapter with a protrusion; Figure 10 for Figure 3 A schematic diagram of the fit between the valve core, guide, and valve seat of a one-way valve.

[0008] 1. Valve body; 2. Adapter; 21. First main body; 22. Second main body; 23. First connecting hole; 24. Second connecting hole; 25. Stepped part; 26. First end face; 3. Valve core assembly; 31. Valve core; 311. Valve core body; 312. Valve core sealing part; 32. Valve core seat; 321. Valve port; 322. Guide part; 3221. Conducting part; 3222. Limiting part; 323. Valve seat sealing part. Detailed Implementation

[0009] To make this application clearer, specific embodiments are described below with reference to the accompanying drawings.

[0010] This utility model provides a one-way valve assembly, including a valve body 1, an adapter 2 disposed at the end of the valve body, and a valve core assembly 3. The valve core assembly 3 is disposed inside the valve body 1. The adapter 2 includes a first main body 21 and a second main body 22, which is sleeved with the valve body 1. The first main body 21 includes a first connecting hole 23 and a second connecting hole 24. Along the axial direction of the first main body 21, both the first connecting hole 23 and the second connecting hole 24 penetrate the first main body 21. The plane perpendicular to the axis of the valve body 1 is the first plane. The first main body 21 includes a cylindrical section, and the projection of the cylindrical section on the first plane is circular.

[0011] Specifically, please refer to Figure 2 The valve body 1 has a cylindrical structure, with openings at both ends that connect to the adapter 2. The adapter 2 can be connected to an external pipeline through the first connection hole 23 and the second connection hole 24. The valve body 1 has an internal cavity for accommodating the valve core assembly 3, which is installed inside the valve body 1 to control the unidirectional flow of fluid.

[0012] The adapter 2 includes a first main body 21 and a second main body 22, with the second main body 22 sleeved to the end of the valve body 1. The first main body 21 is located on the side of the second main body 22 away from the valve body 1, and has a first connecting hole 23 and a second connecting hole 24. The first connecting hole 23 and the second connecting hole 24 penetrate the first main body 21 along its axial direction, and are used to connect to external pipelines to realize fluid input or output. The end face of the first main body 21 away from the valve body 1 is defined as the first end face 26, and the openings of the first connecting hole 23 and the second connecting hole 24 on the first end face 26 are both circular, facilitating connection to external pipelines. This design optimizes the traditional "8" structure of the valve body end into a circular opening structure by making the projection of the adapter's cylindrical section on the first plane circular. During leak detection, only a circular sealing cap is needed to simultaneously seal both ports, simplifying the leak detection operation process. The design of adapter 2 allows the one-way valve assembly to be easily connected to external pipelines, and the first connection hole 23 and the second connection hole 24 can be connected to pipelines of different specifications as needed.

[0013] Further, please refer to Figure 3 The valve core assembly 3 includes a valve core 31 and a valve core seat 32. The valve core seat 32 is welded and fixed to the inner wall of the valve body 1. The valve core seat 32 has a valve port 321. The valve core 31 can move axially relative to the valve core seat 32 to close or open the valve port. The valve core seat 32 is fixed to the inner wall of the valve body 1 by welding to ensure the stability of the valve core seat 32 within the valve body. The valve core seat 32 has a valve port 321, which is the passage for fluid to pass through. The valve core 31 can move axially within the valve core seat 32. When fluid flows in from one direction, the valve core 31 moves under the action of fluid pressure, opening the valve port and allowing fluid to pass through; when fluid flows in from the opposite direction, the valve core 31 moves under the action of fluid pressure, closing the valve port and preventing fluid from passing through, thereby realizing the function of a one-way valve.

[0014] The first main body 21 and the second main body 22 are integral structures, with at least a portion of the outer peripheral wall of the first main body 21 and at least a portion of the outer peripheral wall of the second main body 22 located on the same surface; the inner diameter D1 of the first connecting hole 23 is greater than or equal to the inner diameter D2 of the second connecting hole 24. When the diameter D1 of the first connecting hole 23 is greater than the diameter D2 of the second connecting hole 24, this design allows one connecting hole of the check valve to connect to a capillary tube and the other connecting hole to a process pipe, adapting to the needs of externally connected pipelines of different diameters; when the diameter D1 of the first connecting hole 23 is equal to the diameter D2 of the second connecting hole 24, this design allows both connecting holes of the check valve to connect to capillary tubes. This differentiated design allows for the connection of pipeline components of different diameters according to actual application needs, adapting to different working conditions.

[0015] The first main body 21 and the second main body 22 adopt an integrated structural design, which improves the overall strength and stability of the adapter 2. At least a portion of the outer peripheral wall of the first main body 21 and at least a portion of the outer peripheral wall of the second main body 22 are located on the same plane, making the adapter 2 more compact and easier to install and use.

[0016] Please see Figure 8 and Figure 9 The first main body 21 includes a stepped portion 25, which protrudes axially along the first main body 21. The openings of the first connecting hole 23 and the second connecting hole 24 on the side opposite to the valve core assembly 3 are located on the stepped portion 25. The stepped portion 25 protrudes axially along the first main body 21, forming a protruding structure. The openings of the first connecting hole 23 and the second connecting hole 24 on the side opposite to the valve core assembly 3 are located on the stepped portion 25. This design makes connecting external pipelines more convenient, and the stepped portion 25 provides better support and sealing, reducing the possibility of leakage.

[0017] The adapter 2 is machined from copper rod, the valve body 1 is made of steel, and the second main body 22 is a cylindrical structure. At least a portion of the inner wall of the second main body 22 is welded to the outer wall of the valve body 1 via a tunnel furnace. The adapter 2 is formed from copper rod through machining; copper has good thermal conductivity and corrosion resistance, making it suitable as a fluid connection component. The valve body 1 is made of steel, providing high strength and pressure resistance. The cylindrical structure of the second main body 22 facilitates its connection to the valve body 1. At least a portion of the inner wall of the second main body 22 is welded to the outer wall of the valve body 1 via a tunnel furnace. Tunnel furnace welding is an efficient and reliable connection method, ensuring the connection strength and sealing between the adapter 2 and the valve body 1. The effective welding length L between the second main body 22 and the valve body 1 satisfies: L ≥ 5mm. The effective welding length L between the second main body 22 and the valve body 1 is not less than 5mm. This welding length ensures the connection strength and sealing, preventing leakage or loosening under high-pressure operating conditions. The longer weld length increases the weld area, improving the reliability and service life of the connection.

[0018] Further, please refer to Figure 10 The valve core seat 32 includes a valve port portion 321 and a guide portion 322. The valve port portion 321 and the guide portion 322 are fixedly connected or are an integral structure. The guide portion 322 is arranged along the axial direction of the valve body 1. The valve core 31 is movably arranged in the guide portion 322. The valve core includes a valve core body 311 and a valve core sealing portion 312. The valve core body 311 and the guide portion 322 are guided and fitted together. The valve port portion 321 has a valve seat sealing portion 323 that is adapted to the valve core sealing portion 312.

[0019] The valve core seat 32 consists of a valve port portion 321 and a guide portion 322. The valve port portion 321 and the guide portion 322 can be two fixedly connected parts or an integrally formed structure. The guide portion 322 is arranged along the axial direction of the valve body 1 and is used to guide the movement direction of the valve core 31. The valve core 31 can move within the guide portion 322. The valve core 31 consists of a valve core body 311 and a valve core sealing portion 312. A guiding fit relationship is formed between the valve core body 311 and the guide portion 322 to ensure that the valve core 31 moves along a predetermined axial path. A valve seat sealing portion 323 is provided on the valve port portion 321. The valve seat sealing portion 323 is adapted to the valve core sealing portion 312. When the valve core 31 moves to a specific position, the valve core sealing portion 312 contacts the valve seat sealing portion 323 to form a seal and prevent fluid from passing through.

[0020] The valve core sealing part 312 is a spherical sealing surface, and the valve seat sealing part 323 is a conical sealing surface that mates with the spherical sealing surface. The conical sealing surface forms at least a portion of the valve port wall of the valve port 321. The spherical sealing surface design of the valve core sealing part 312 provides better sealing and reduces the possibility of leakage. The conical sealing surface design of the valve seat sealing part 323 mates with the spherical sealing surface 312. When the valve core 31 moves to the closed position, the spherical sealing part and the conical sealing part contact each other, forming point contact or line contact, achieving a good sealing effect. The conical sealing surface forms at least a portion of the valve port wall of the valve port 321, allowing fluid to flow through the valve port 321 when the valve is open.

[0021] The cone angle of the conical sealing surface is 60°~80°; the surface roughness of the spherical sealing surface is 0.4μm≤Ra≤0.8μm. The cone angle of the conical sealing surface is designed between 60° and 80°, which provides good sealing performance and appropriate opening force. If the cone angle is too small, the valve core may be difficult to open; if the cone angle is too large, it may affect the sealing performance. The surface roughness of the spherical sealing surface is controlled between 0.4μm and 0.8μm. This fine surface treatment ensures a smooth sealing surface, reduces friction and wear, extends the service life of the check valve, and improves sealing performance. The sealing design of the check valve assembly uses a combination of spherical and conical sealing surfaces. This design provides good sealing performance and reduces the possibility of leakage. Controlling the surface roughness of the spherical sealing surface within a suitable range ensures a smooth sealing surface, reduces friction and wear, and extends the service life of the valve.

[0022] The guide portion 322 includes a through portion 3221 and a limiting portion 3222. The through portion 3221 is a through hole that penetrates the side wall of the guide portion. The guide portion 322 is connected to the inner cavity of the valve body 1 through the through portion 3221. The end of the guide portion 322 away from the valve core seat 32 is narrowed to form the limiting portion 3222. The inner diameter of the limiting portion 3222 is smaller than the outer diameter of the valve core body 311.

[0023] The guide portion 322 is provided with a through portion 3221, which is a through hole penetrating the side wall of the guide portion. Through these through holes, the internal space of the guide portion 322 can communicate with the inner cavity of the valve body 1, and fluid can flow through these through holes. The end of the guide portion 322 away from the valve core seat 32 is designed with a constricted structure to form a limiting portion 3222. The inner diameter of the limiting portion 3222 is smaller than the outer diameter of the valve core body 311. This design can prevent the valve core 31 from completely disengaging from the guide portion 322, thus playing a limiting role and ensuring that the valve core 31 moves within a predetermined range. The guiding design of the check valve assembly ensures that the valve core 31 moves on a predetermined axial path, preventing the valve core 31 from deflecting or jamming, and improving the working reliability of the check valve. The limiting design prevents the valve core 31 from completely disengaging from the guide portion 322, ensuring that the valve core 31 moves within a predetermined range and avoiding the loss or damage of the valve core 31.

[0024] In practical applications, when fluid flows in from one end of the valve body 1, the fluid pressure pushes the valve core 31 to move, causing the valve core sealing part 312 to move away from the valve seat sealing part 323, opening the valve port and allowing fluid to flow through. When fluid flows in from the other end, the fluid pressure pushes the valve core 31 to move in the opposite direction, causing the valve core sealing part 312 to contact the valve seat sealing part 323, closing the valve port and preventing fluid from passing through, thus realizing the function of a one-way valve.

[0025] The working principle of a one-way valve assembly is to control the unidirectional flow of fluid by utilizing the fluid pressure difference and the movement of the valve core. When fluid enters from the direction that allows flow, the fluid pressure pushes the valve core 31 to move, opening the valve port and allowing fluid to pass through; when fluid enters from the direction that prohibits flow, the fluid pressure pushes the valve core 31 to move, closing the valve port and preventing fluid from passing through. This one-way valve assembly has a simple structure, reliable operation, and is suitable for various applications requiring control of unidirectional fluid flow.

[0026] The materials selected for the check valve assembly take into account the working environment and performance requirements. Valve body 1 is made of steel, offering high strength and pressure resistance; adapter 2 is made of copper, providing good thermal conductivity and corrosion resistance; the materials for valve core 31 and valve core seat 32 also consider wear resistance and sealing performance. The check valve assembly is connected by welding, ensuring a robust and leak-proof connection capable of withstanding high working pressures. The weld length is designed to balance connection strength and service life, ensuring that loosening or leakage will not occur during long-term use.

[0027] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the technical solutions and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A one-way valve assembly, characterized in that, The device includes a valve body (1), an adapter (2) disposed at the end of the valve body (1), and a valve core assembly (3). The valve core assembly (3) is disposed inside the valve body (1). The adapter (2) includes a first main body (21) and a second main body (22). The second main body (22) is sleeved with the valve body (1). The first main body (21) includes a first connecting hole (23) and a second connecting hole (24). Along the axial direction of the first main body (21), both the first connecting hole (23) and the second connecting hole (24) penetrate the first main body (21). A plane perpendicular to the axis of the valve body (1) is defined as a first plane. The first main body (21) includes a cylindrical section. The projection of the cylindrical section on the first plane is circular.

2. The one-way valve assembly according to claim 1, characterized in that, The valve core assembly (3) includes a valve core (31) and a valve core seat (32). The valve core seat (32) is welded and fixed to the inner wall of the valve body (1). The valve core seat (32) has a valve port. The valve core (31) can move axially relative to the valve core seat (32) to close or open the valve port.

3. The one-way valve assembly according to claim 1 or 2, characterized in that, The first main body (21) and the second main body (22) are integral structures, and at least a portion of the outer peripheral wall of the first main body (21) and at least a portion of the outer peripheral wall of the second main body (22) are located on the same surface; the inner diameter D1 of the first connecting hole (23) is greater than or equal to the inner diameter D2 of the second connecting hole (24).

4. The one-way valve assembly according to claim 3, characterized in that, The first main body (21) includes a stepped portion (25) which protrudes along the axial direction of the first main body (21), and the openings of the first connecting hole (23) and the second connecting hole (24) on the side away from the valve core assembly (3) are located in the stepped portion (25).

5. The one-way valve assembly according to any one of claims 2 or 4, characterized in that, The adapter (2) is formed by machining copper rod, the valve body (1) is made of steel, the second main body (22) is a cylindrical structure, and at least part of the inner wall of the second main body (22) is welded to the outer wall of the end of the valve body (1) by a tunnel furnace.

6. A one-way valve assembly according to claim 5, characterized in that, The effective welding length L between the second main body (22) and the end of the valve body (1) satisfies: L≥ 5mm.

7. A one-way valve assembly according to claim 2, characterized in that, The valve core seat (32) includes a valve port portion (321) and a guide portion (322). The valve port portion (321) and the guide portion (322) are fixedly connected or are an integral structure. The guide portion (322) is arranged along the axial direction of the valve body (1). The valve core (31) is movably arranged in the guide portion (322). The valve core (31) includes a valve core body (311) and a valve core sealing portion (312). The valve core body (311) and the guide portion (322) are guided and cooperated. The valve port portion (321) has a valve seat sealing portion (323) that is adapted to the valve core sealing portion (312).

8. The one-way valve assembly according to claim 7, characterized in that, The valve core sealing part (312) is a spherical sealing surface, and the valve seat sealing part (323) is a conical sealing surface that cooperates with the spherical sealing surface. The conical sealing surface constitutes at least a portion of the valve port wall of the valve port part (321).

9. The one-way valve assembly according to claim 8, characterized in that, The cone angle of the conical sealing surface is 60°~80°; the surface roughness of the spherical sealing surface is 0.4μm≤Ra≤0.8μm.

10. The one-way valve assembly according to claim 7, characterized in that, The guide portion (322) includes a through portion (3221) and a limiting portion (3222). The through portion (3221) is a through hole that penetrates the side wall of the guide portion (322). The guide portion (322) is connected to the inner cavity of the valve body (1) through the through portion (3221). The end of the guide portion (322) away from the valve core seat (32) is narrowed to form the limiting portion (3222). The inner diameter of the limiting portion (3222) is smaller than the outer diameter of the valve core body (311).

11. The one-way valve assembly according to claim 1 or 2, characterized in that, The first main body (21) and the second main body (22) are integral structures, and at least a portion of the outer peripheral wall of the first main body (21) and at least a portion of the outer peripheral wall of the second main body (22) are located on the same surface; the inner diameter D1 of the first connecting hole (23) is greater than or equal to the inner diameter D of the second connecting hole (24). 2； The adapter (2) is formed by machining copper rod, the valve body (1) is made of steel, the second main body (22) is a cylindrical structure, and at least part of the inner wall of the second main body (22) is welded to the outer wall of the end of the valve body (1) by a tunnel furnace.

12. A one-way valve assembly according to claim 11, characterized in that, The effective welding length L between the second main body (22) and the end of the valve body (1) satisfies: L≥ 5mm.

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