Valve seat assembly

Abstract

The utility model relates to a valve seat assembly which comprises a valve seat component, a first circulation hole is formed in the side wall of the valve seat component, a second circulation hole is formed in the bottom of the valve seat component, the valve seat component is provided with an inner cavity for containing a valve needle component, and a sealing gasket is installed at the bottom of the inner cavity. A valve port aligned with the second circulation hole is formed in the sealing gasket, a circle of sealing matching face is arranged at the position of an upper port of the valve port, and the valve needle component is matched with the sealing matching face to open and close the valve port. According to the utility model, a circle of sealing matching surface at the upper port of the valve port is matched with the valve needle component to open and close the valve port, so that the sealing effect can be greatly improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic expansion valves, in particular to a valve seat assembly. Background Art

[0002] At present, electronic expansion valves are usually used to adjust the flow of fluids in various refrigeration and heating equipment such as air conditioners, refrigerators, and heat pump water heaters. Electronic expansion valves are usually composed of valve seat components, valve needle components, and sealing gaskets. The sealing gasket is provided with a valve port, and the opening of the valve port is adjusted by the movement of the valve needle component.

[0003] The electronic expansion valves in the prior art, such as the electronic expansion valve with application number 202220250108.6, all use the end face of the valve needle component to directly cooperate with the end face of the sealing gasket to achieve the sealing of the valve port. This structure has a general sealing effect and requires the end face of the valve needle component to be much larger than the valve port of the sealing gasket. The specifications of the valve needle component need to be relatively large, and the cost is relatively high. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a valve seat assembly, which adopts a circle of sealing matching surface at the upper end of the valve port to cooperate with the valve needle component to realize the opening and closing of the valve port, which can greatly improve the sealing effect and prolong the service life.

[0005] The technical solution adopted by the utility model to solve its technical problems is: to provide a valve seat assembly, including a valve seat component, the side wall of the valve seat component is provided with a first flow hole, the bottom of the valve seat component is provided with a second flow hole, the valve seat component has an inner cavity for accommodating a valve needle component, a sealing gasket is installed at the bottom of the inner cavity, the sealing gasket is provided with a valve port aligned with the second flow hole, a circle of sealing mating surface is arranged at the upper end of the valve port, and the valve needle component cooperates with the sealing mating surface to open and close the valve port.

[0006] As a supplement to the technical solution described in the utility model, the sealing matching surface is a conical surface, and the diameter of the conical surface gradually decreases from top to bottom.

[0007] As a supplement to the technical solution described in the utility model, the outer side wall of one end of the valve needle component that matches with the sealing matching surface is provided with a chamfer.

[0008] As a supplement to the technical solution described in the utility model, the valve seat component includes a coaxially connected valve seat body and a base, the first flow hole is arranged on the outer wall of the valve seat body, the second flow hole is opened at the bottom of the base, a sealing gasket is installed in the upper part of the base, and a pressure ring is provided at the lower end of the valve seat body, which presses the sealing gasket.

[0009] As a supplement to the technical solution described in the utility model, an installation groove for accommodating a sealing gasket is opened at the upper end of the base, and the outer side of the upper end of the sealing gasket has a first annular step, which forms a first annular groove with the inner wall of the installation groove, and the pressure ring is located in the first annular groove.

[0010] As a supplement to the technical solution described in the utility model, the outer side of the lower end of the sealing gasket has a second annular step, and the second annular step and the inner wall of the installation groove form a second annular groove. A reinforced sealing ring is installed in the second annular groove.

[0011] As a supplement to the technical solution described in the utility model, the valve seat body and the pressure ring are integrally formed.

[0012] Beneficial effect: The utility model relates to a valve seat assembly, which adopts a circle of sealing mating surface at the upper end of the valve port to cooperate with the valve needle component to realize the opening and closing of the valve port. Compared with the traditional sealing structure in which the end face of the sealing gasket and the end face of the valve needle component are butt-sealed, it can greatly improve the sealing effect and extend the service life; the outer wall of the end of the valve needle component that cooperates with the sealing mating surface is provided with a chamfer, and the chamfer makes the valve needle component and the sealing mating surface cooperate more smoothly and fit more closely, thereby improving the sealing effect; the inner wall of the installation groove and the end face of the base are both limited by the first annular step, and then the sealing gasket is pressed by the pressure ring, and at the same time, the inner wall of the installation groove will also limit the sealing gasket, so that the sealing gasket is limited and pressed, and the operation is convenient and the assembly efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the utility model after the rear valve needle component is removed;

[0015] Figure 3 It is a structural schematic diagram of the valve needle component described in the utility model;

[0016] Figure 4 It is a structural schematic diagram of the valve seat body described in the utility model;

[0017] Figure 5 It is a structural schematic diagram of the base described in the utility model;

[0018] Figure 6 It is a structural schematic diagram of the sealing pad described in the utility model.

[0019] Illustration: 1. Valve seat body, 2. Base, 3. Second flow hole, 4. Reinforced sealing ring, 5. Sealing gasket, 6. First flow hole, 7. Valve needle component, 8. Sealing mating surface, 9. Valve port, 10. Inner cavity, 11. Chamfer, 12. Pressing ring, 13. Installation groove, 14. First annular step, 15. Second annular step. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0021] The embodiment of the utility model relates to a valve seat assembly, such as Figure 1-6 As shown, it includes a valve seat component, a side wall of which is provided with a first flow hole 6, a bottom of which is provided with a second flow hole 3, and the valve seat component has an inner cavity 10 for accommodating a valve needle component 7, a sealing gasket 5 is installed at the bottom of the inner cavity 10, a valve port 9 aligned with the second flow hole 3 is formed on the sealing gasket 5, a circle of sealing mating surface 8 is arranged at the upper end of the valve port 9, and the valve needle component 7 cooperates with the sealing mating surface 8 to open and close the valve port 9.

[0022] The utility model adopts a circle of sealing mating surface 8 at the upper end of the valve port 9 to cooperate with the valve needle component 7 to realize the opening and closing of the valve port 9. Compared with the traditional sealing structure in which the end face of the sealing gasket and the end face of the valve needle component are butt-sealed, it can greatly improve the sealing effect and extend the service life. In addition, the specifications of the valve needle component 7 are relatively small, which can reduce costs.

[0023] Reference Figure 1 and Figure 3 As shown, the outer wall of one end of the valve needle component 7 that cooperates with the sealing mating surface 8 is provided with a chamfer 11. The provision of the chamfer 11 makes the valve needle component 7 and the sealing mating surface 8 cooperate more smoothly and fit more closely, thereby improving the sealing effect; the sealing mating surface 8 is a conical surface, and the diameter of the conical surface gradually decreases from top to bottom.

[0024] Reference Figure 1 and Figure 2As shown, the valve seat component includes a valve seat body 1 and a base 2 that are coaxially connected, the first flow hole 6 is arranged on the outer wall of the valve seat body 1, the second flow hole 3 is opened at the bottom of the base 2, a sealing gasket 5 is installed in the upper part of the base 2, and a pressure ring 12 is provided at the lower end of the valve seat body 1, and the pressure ring 12 presses the sealing gasket 5; the sealing gasket 5 is arranged to ensure the sealing effect at the second flow hole 3; the valve seat body 1 and the base 2 are fixed by welding.

[0025] Reference Figure 5 and Figure 6 As shown, the upper end of the base 2 is provided with a mounting groove 13 for accommodating the sealing gasket 5, and the mounting groove 13 is a circular groove. The sealing gasket 5 is also in the shape of a circular plate, and the outer side of the upper end of the sealing gasket 5 is provided with a first annular step 14, and the first annular step 14 and the inner wall of the mounting groove 13 form a first annular groove, and the pressure ring 12 is located in the first annular groove; the inner wall of the mounting groove 13 and the end face of the base 2 are limitedly matched with the first annular step 14, and then the sealing gasket 5 is pressed by the pressure ring 12, and at the same time, the inner wall of the mounting groove 13 will also limit the sealing gasket 5, so as to achieve the limited and tight compression of the sealing gasket 5.

[0026] Reference Figure 6 As shown, the outer side of the lower end of the sealing gasket 5 has a second annular step 15, and the second annular step 15 and the inner wall of the installation groove 13 form a second annular groove, and a reinforced sealing ring 4 is installed in the second annular groove; a reinforced sealing ring 4 is added between the inner wall of the installation groove 13 and the sealing gasket 5 to further improve the sealing effect at the second flow hole 3.

[0027] Reference Figure 4 As shown, the valve seat body 1 and the pressure ring 12 are integrally formed, which simplifies the installation of the pressure ring 12. Once the valve seat body 1 and the base 2 are aligned and welded, the pressure ring 12 is installed in place.

[0028] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0031] The valve seat assembly provided by the present application is introduced in detail above. The principle and implementation mode of the present application are explained in detail by using specific examples in this article. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for the general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation mode and the scope of application. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A valve seat assembly, comprising a valve seat component, characterized in that: The side wall of the valve seat component is provided with a first flow hole (6), and the bottom of the valve seat component is provided with a second flow hole (3). The valve seat component has an inner cavity (10) for accommodating a valve needle component (7), and a sealing gasket (5) is installed at the bottom of the inner cavity (10). The sealing gasket (5) is provided with a valve port (9) aligned with the second flow hole (3), and a circle of sealing mating surface (8) is arranged at the upper end of the valve port (9). The valve needle component (7) cooperates with the sealing mating surface (8) to open and close the valve port (9).

2. A valve seat assembly according to claim 1, characterized in that: The sealing matching surface (8) is a conical surface, the diameter of which gradually decreases from top to bottom.

3. A valve seat assembly according to claim 1, characterized in that: The outer side wall of one end of the valve needle component (7) that matches the sealing matching surface (8) is provided with a chamfer (11).

4. A valve seat assembly according to claim 1, characterized in that: The valve seat component comprises a coaxially connected valve seat body (1) and a base (2); the first flow hole (6) is arranged on the outer wall of the valve seat body (1); the second flow hole (3) is opened at the bottom of the base (2); a sealing gasket (5) is installed in the upper part of the base (2); and a pressure ring (12) is provided at the lower end of the valve seat body (1), and the pressure ring (12) presses the sealing gasket (5).

5. A valve seat assembly according to claim 4, characterized in that: The upper end of the base (2) is provided with a mounting groove (13) for accommodating the sealing gasket (5), and the outer side of the upper end of the sealing gasket (5) has a first annular step (14), and the first annular step (14) and the inner wall of the mounting groove (13) form a first annular groove, and the pressure ring (12) is located in the first annular groove.

6. A valve seat assembly according to claim 4, characterized in that: The outer side of the lower end of the sealing gasket (5) is provided with a second annular step (15), and the second annular step (15) and the inner wall of the installation groove (13) form a second annular groove, and a reinforcing sealing ring (4) is installed in the second annular groove.

7. A valve seat assembly according to claim 4, characterized in that: The valve seat body (1) and the pressure ring (12) are integrally formed.

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