Valve seat of pressure release valve

Abstract

The utility model relates to a pressure release valve seat of a high-pressure oil pump assembly, which comprises a valve seat body, one end of the valve seat body is fixed on a pump body hole of a pump body, the other end of the valve seat body is movably connected with a valve ball, the valve seat body comprises a connecting section matched with the shape of the pump body hole, and the pump body hole is in interference fit with the connecting section. The valve seat body further comprises a conical surface matching section, a radial ring groove is formed in the outer side of the valve seat body, and the radial ring groove is located between the connecting section and the conical surface matching section. Compared with the prior art, the connecting section and the conical surface matching section are isolated through the radial ring groove in the outer side of the valve seat body, deformation of the conical surface of the valve seat is reduced, and the sealing performance and durability of the pressure release valve are improved.

Description

Technical Field

[0001] The utility model relates to the field of valve equipment, in particular to a pressure relief valve seat. Background Art

[0002] With the continuous improvement of the intensification degree of high-power density gasoline pumps, higher requirements are put forward for the fuel injection system, which is the "heart" of the gasoline pump. The high-pressure common rail fuel injection system has gradually become the mainstream fuel injection system due to its high injection pressure, precisely controllable fuel injection volume and injection timing, and flexibly adjustable fuel injection law. When the pressure in the equipment or pipeline exceeds the set pressure of the pressure relief valve, the pressure relief valve will automatically open to relieve the pressure, ensuring that the pressure of the medium in the equipment and pipeline is below the set pressure, protecting the equipment and pipeline, and preventing accidents.

[0003] For example, when high-pressure products are used for high-pressure gas or fluid transportation, in order to avoid damage to the products caused by overpressure of the gas or fluid, a pressure relief valve is generally set on the gas or fluid transportation channel to relieve the pressure when the medium pressure exceeds the set pressure.

[0004] However, the existing pressure relief valve realizes the function of protecting the safety of the high-pressure system by relieving excessive pressure through the cooperation of the valve seat conical surface and the ball. The valve seat is fixed on the pump body through the pump body hole, and the valve seat and the pump body hole are in interference fit. The radial holding force generated by the interference fit will cause the deformation of the valve seat conical surface, thereby affecting the sealing performance and durability between the valve seat and the valve ball. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the defect that the existing pressure relief valve realizes the cooperation between the valve seat conical surface and the ball, and the radial holding force generated by the interference fit between the valve seat and the pump body hole will cause the deformation of the valve seat conical surface, and to provide a pressure relief valve seat.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] A pressure relief valve seat includes a valve seat body. One end of the valve seat body is fixed on the pump body hole of the pump body, and the other end is movably connected to a valve ball. The valve seat body includes a connection section that matches the shape of the pump body hole, and the pump body hole and the connection section are in interference fit. The valve seat body also includes a conical surface matching section. A radial ring groove is arranged on the outer side of the valve seat body, and the radial ring groove is located between the connection section and the conical surface matching section.

[0008] Preferably, the conical surface matching section is in the shape of a conical frustum. A notch matching the shape of the valve ball is arranged at one end of the conical surface matching section close to the valve ball, and the valve ball is located in the notch.

[0009] Preferably, the taper of the side wall of the conical surface matching section is 45 - 55 degrees.

[0010] Preferably, a fillet is arranged at one end of the conical surface matching section close to the radial ring groove.

[0011] Preferably, the depth of the radial annular groove is 0.6 - 0.7 times the radius of the valve seat body.

[0012] Preferably, the width of the radial annular groove is 2 - 3 times the length of the tapered surface fitting section.

[0013] Preferably, the pump body hole is coaxially arranged with the connecting section, and the depth of the pump body hole is less than the length of the connecting section.

[0014] Preferably, the axial section of the radial annular groove is in the shape of a circular ring.

[0015] Preferably, the radial annular groove is coaxially arranged with the valve seat body.

[0016] Preferably, a chamfer is provided at the bottom of the radial annular groove.

[0017] Compared with the prior art, the present utility model has the following advantages:

[0018] (1) In this solution, the radial annular groove provided on the outer side of the valve seat body isolates the end of the valve seat body connecting the pump body hole and the end connecting the valve ball. The interference radial force generated by the pump body hole on the connecting section is stress - released through the radial annular groove, avoiding the action of the interference radial force on the tapered surface fitting section and preventing the tapered surface fitting section from deforming.

[0019] By providing a radial annular groove between the connecting section and the tapered surface fitting section, it plays a role in stress release, blocking the action of the interference radial force generated by the connection between the connecting section and the pump body hole on the valve seat body, especially the tapered surface fitting section. Thereby, the deformation of the tapered surface fitting section caused by the interference radial force generated by the connecting section is reduced, and the tightness and reliability of the cooperation between the tapered surface provided on the tapered surface fitting section and the valve ball are improved.

[0020] (2) In this solution, the interference radial force generated outside the connecting section is released by using the radial annular groove, so that the interference radial force does not act on the outer side of the tapered surface fitting section. That is, it avoids the problem that the interference radial force generated by the interference fit between the valve seat body and the pump body hole causes the deformation of the contact end of the tapered surface fitting section and the valve ball, affecting the sealing performance and durability of the valve seat body. Effectively reducing the situation where the tapered surface of the tapered surface fitting section is deformed by the interference radial force, the sealing performance and durability of the pressure relief valve are improved. Description of the Drawings

[0021] Figure 1 It is a partial structural schematic diagram of the pressure relief valve seat provided by the present utility model installed in the pressure relief valve;

[0022] Figure 2 It is a structural schematic diagram of the valve seat body provided by the present utility model;

[0023] In the figure: 1. Valve seat body, 2. Pump body hole, 3. Valve ball, 11. Connection section, 12. Tapered surface mating section, 13. Radial ring groove. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0026] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0028] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless otherwise specifically defined.

[0029] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] Embodiment 1

[0031] As shown in Figure 1 , this embodiment provides a pressure relief valve seat, including a valve seat body 1. One end of the valve seat body 1 is fixedly connected to the pump body hole 2 of the pump body, and the other end is movably connected to the valve ball 3. The valve seat body 1 includes a connection section 11 that matches the shape of the pump body hole 2, and the pump body hole 2 and the connection section 11 are in interference fit. The valve seat body 1 further includes a tapered surface fitting section 12. A radial ring groove 13 is provided on the outer side of the valve seat body 1, and the radial ring groove 13 is located between the connection section 11 and the tapered surface fitting section 12.

[0032] Working principle: The radial ring groove 13 provided on the outer side of the valve seat body 1 isolates one end of the valve seat body 1 connected to the pump body hole 1 from the end connected to the valve ball 3. The interference radial force generated by the pump body hole 1 on the connection section 11 is stress-released through the radial ring groove 13, avoiding the action of the interference radial force on the tapered surface fitting section 12 and causing deformation of the tapered surface fitting section 12.

[0033] By providing the radial ring groove 13 between the connection section 11 and the tapered surface fitting section 12, it plays a role in stress release, cutting off the action of the interference radial force generated by the connection between the connection section 11 and the pump body hole 2 on the valve seat body 1, especially on the tapered surface fitting section 12. Thus, the deformation of the tapered surface fitting section 12 caused by the interference radial force generated by the connection section 11 is reduced, and the tightness and reliability of the cooperation between the tapered surface provided on the tapered surface fitting section 12 and the valve ball 3 are improved.

[0034] As a preferred embodiment, as shown in Figure 2 , the tapered surface fitting section 12 is in the shape of a tapered frustum. A notch matching the shape of the valve ball 3 is provided at one end of the tapered surface fitting section 12 close to the valve ball 3, and the valve ball 3 is located in the notch.

[0035] Among them, the taper of the side wall of the tapered surface fitting section 12 is 45 - 55 degrees. A fillet is provided at one end of the tapered surface fitting section 12 close to the radial ring groove 13. The depth of the radial ring groove 13 is 0.6 - 0.7 times the radius of the valve seat body 1. The width of the radial ring groove 13 is 2 - 3 times the length of the tapered surface fitting section 12. Preferably, the taper of the side wall of the tapered surface fitting section 12 is 51.5 degrees.

[0036] Utilize the radial ring groove to release the interference radial force generated outside the connection section, so that the interference radial force will not act on the outside of the tapered surface fitting section, that is, it avoids the problem that the interference radial force generated by the interference fit between the valve seat body and the pump body hole causes deformation of the contact end between the tapered surface fitting section and the valve ball, affecting the sealing performance and durability of the valve seat body. It effectively reduces the deformation of the tapered surface of the tapered surface fitting section caused by the interference radial force, and improves the sealing performance and durability of the pressure relief valve.

[0037] Specifically, the pump body hole is coaxially arranged with the connecting section 11, and the depth of the pump body hole is less than the length of the connecting section 11. The axial section of the radial ring groove 13 is in a circular ring shape. The radial ring groove 13 is coaxially arranged with the valve seat body 1. The bottom of the radial ring groove 13 is provided with a chamfer.

[0038] The length of the pump body hole arranged in the connecting section 11 is limited to prevent the connection between the pump body and the pump body hole from affecting the conical surface of the conical surface matching section 12 through the radial ring groove 13, causing deformation, and enabling smooth connection between the various sections of the valve seat body 1.

[0039] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should fall within the protection scope determined by the claims.

Claims

1. A pressure relief valve seat, comprising a valve seat body (1), one end of the valve seat body (1) is fixed to a pump body hole (2) of a pump body, and the other end is movably connected to a valve ball (3), the valve seat body (1) comprises a connecting section (11) whose shape matches the pump body hole (2), the pump body hole (2) and the connecting section (11) are interference fit, and the characteristics are as follows: The valve seat body (1) further comprises a conical surface fitting section (12). A radial annular groove (13) is provided on the outer side of the valve seat body (1). The radial annular groove (13) is located between the connecting section (11) and the conical surface fitting section (12).

2. A pressure relief valve seat according to claim 1, characterized in that: The conical surface matching section (12) is in the shape of a conical truncated cone. An end of the conical surface matching section (12) close to the valve ball (3) is provided with a notch matching the shape of the valve ball (3), and the valve ball (3) is located in the notch.

3. A pressure relief valve seat according to claim 2, characterized in that: The taper of the side wall of the tapered surface fitting section (12) is 45-55 degrees.

4. A pressure relief valve seat according to claim 1, characterized in that: One end of the conical surface fitting section (12) close to the radial annular groove (13) is provided with a chamfered corner.

5. The pressure relief valve seat according to claim 1, characterized in that: The depth of the radial annular groove (13) is 0.6-0.7 times the radius of the valve seat body (1).

6. A pressure relief valve seat according to claim 1, characterized in that: The width of the radial annular groove (13) is 2-3 times the length of the conical surface fitting section (12).

7. The pressure relief valve seat according to claim 1, characterized in that: The pump body hole (2) is coaxially arranged with the connecting section (11), and the depth of the pump body hole (2) is smaller than the length of the connecting section (11).

8. The pressure relief valve seat according to claim 1, characterized in that: The axial cross section of the radial annular groove (13) is in the shape of a circular ring.

9. A pressure relief valve seat according to claim 8, characterized in that: The radial annular groove (13) is coaxially arranged with the valve seat body (1).

10. The pressure relief valve seat according to claim 1, characterized in that: The groove bottom of the radial annular groove (13) is provided with a rounded corner.

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