Double-sided contact valve rubber

Abstract

The utility model relates to the technical field of oil drilling and production mud pumps, in particular to a double-face contact valve rubber sheet which comprises a valve seat, a valve element and a valve rubber sheet body, the valve element is installed inside the valve seat, and a valve rubber sheet body installation groove is formed in the outer wall of the valve element and located at the joint of the valve seat and the valve element. Wherein the valve rubber sheet body is sleeved with a valve rubber sheet body mounting groove in the outer wall of the valve element, a first inclined face and a second inclined face are arranged on the outer wall of the valve rubber sheet body and correspond to the valve seat, and a V-shaped face is formed between the first inclined face and the second inclined face. According to the double-face contact valve, the double-face contact valve rubber is provided to replace traditional design face contact, when the valve seat and the valve element move relative to each other, the valve seat makes contact with the first inclined face firstly and then impacts the second inclined face under certain pressure, in other words, one face makes contact firstly, double-face contact is achieved under certain pressure impact, and the buffering effect is achieved; the rubber cannot be in a fatigue state after long-term work, and the service life is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling mud pumps, in particular to a double-sided contact valve rubber. Background Art

[0002] The valve rubber and valve body are assembled together with the valve seat to form a valve assembly. In the oil drilling mud pump, the piston reciprocates in the cylinder sleeve to make the valve assembly suck in the mud through the inlet and discharge it through the outlet. It is also one of the main vulnerable parts of the mud pump. In the traditional valve assembly, the valve rubber and the valve seat work in a single-sided contact, such as Figure 4 and Figure 5 ,in Figure 5 The a in the figure is the single side where the valve rubber contacts the valve seat. The single side is subjected to pressure impact friction, especially in complex media, which causes the rubber to be in a fatigue state for a long time. The rubber is damaged, and the liquid in the mud bleeds into the valve body and valve seat, thus shortening the service life.

[0003] In summary, the utility model solves the existing problems by designing a double-sided contact valve rubber. Utility Model Content

[0004] The utility model aims to provide a double-sided contact valve rubber to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A double-sided contact valve rubber comprises a valve seat, a valve core and a valve rubber body, wherein the valve core is installed inside the valve seat, and a valve rubber body installation groove is provided on the outer wall of the valve core and at the junction of the valve seat and the valve core, wherein the valve rubber body is sleeved inside the valve rubber body installation groove on the outer wall of the valve core, and a first inclined surface and a second inclined surface are provided on the outer wall of the valve rubber body and corresponding to the valve seat, wherein a V-shaped surface is formed between the first inclined surface and the second inclined surface, wherein the angle of the V-shaped surface is θ, 150°≤θ≤175°, the first inclined surface is in contact with the side surface of the valve seat, and the second inclined surface is fitted with the side surface of the valve seat in a clearance fit.

[0007] As a preferred solution of the utility model, the valve core performs piston motion inside the valve seat, and the valve rubber body is a circular ring structure.

[0008] As a preferred solution of the utility model, the valve rubber body and the valve rubber body installation groove are matched in an interference fit manner.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] In the utility model, a double-sided contact valve rubber is proposed to replace the traditional design surface contact. When the valve seat and the valve core move relative to each other, the valve seat first contacts with the first inclined surface, and then contacts with the second inclined surface under a certain pressure impact. That is, one surface contacts first, and then contacts with both surfaces under a certain pressure impact, which plays a buffering role, so that the rubber will not be in a fatigue state under long-term work, and the service life is greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the connection structure between the valve seat, valve core and valve rubber body of the utility model;

[0012] Figure 2 For this utility model Figure 1 A is a schematic diagram of the enlarged structure;

[0013] Figure 3 This is a schematic diagram of the structure of the rubber body of the valve of the utility model;

[0014] Figure 4 It is a schematic diagram of the connection structure of the existing valve seat, valve core and valve rubber body;

[0015] Figure 5 It is a schematic diagram of the existing valve rubber body structure.

[0016] In the figure: 1, valve seat; 2, valve core; 3, valve rubber body; 301, first inclined surface; 302, second inclined surface. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0018] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0021] For examples, see Figure 1-5 , the utility model provides a technical solution:

[0022] A double-sided contact valve rubber comprises a valve seat 1, a valve core 2 and a valve rubber body 3, wherein the valve core 2 is installed inside the valve seat 1, and a valve rubber body installation groove is provided on the outer wall of the valve core 2 and at the junction of the valve seat 1 and the valve core 2, wherein the valve rubber body 3 is sleeved inside the valve rubber body installation groove on the outer wall of the valve core 2, and a first inclined surface 301 and a second inclined surface 302 are provided on the outer wall of the valve rubber body 3 and corresponding to the valve seat 1, wherein the first inclined surface 301 and the second inclined surface 302 form a V-shaped surface, wherein the angle of the V-shaped surface is θ, 150°≤θ≤175°, the first inclined surface 301 contacts the side surface of the valve seat 1, and the second inclined surface 302 is matched with the side surface of the valve seat 1 in a clearance fit.

[0023] As a further preferred solution of the present invention, the valve core 2 performs piston motion inside the valve seat 1, and the valve rubber body 3 is a circular ring structure.

[0024] As a further preferred solution of the present invention, the valve rubber body 3 and the valve rubber body installation groove are matched in an interference fit manner.

[0025] Based on the above conditions: This solution proposes a double-sided contact valve rubber to replace the traditional design surface contact. When the valve seat 1 and the valve core 2 move relative to each other, the valve seat 1 first contacts the first inclined surface 301, and then the second inclined surface 302 under a certain pressure impact, that is, one surface contacts first, and then under a certain pressure impact, it contacts both surfaces, which plays a buffering role, so that the rubber will not be in a fatigue state under long-term work, greatly enhancing its service life.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-sided contact valve rubber, comprising a valve seat (1), a valve core (2) and a valve rubber body (3), characterized in that: The valve core (2) is installed inside the valve seat (1); the outer wall of the valve core (2) is provided with a valve rubber body installation groove at the connection between the valve seat (1) and the valve core (2); the valve rubber body (3) is sleeved inside the valve rubber body installation groove on the outer wall of the valve core (2); a first inclined surface (301) and a second inclined surface (302) are provided on the outer wall of the valve rubber body (3) and corresponding to the valve seat (1); a V-shaped surface is formed between the first inclined surface (301) and the second inclined surface (302); the angle of the V-shaped surface is θ, 150°≤θ≤175°; the first inclined surface (301) is in contact with the side surface of the valve seat (1); the second inclined surface (302) is fitted with the side surface of the valve seat (1) in a clearance fit.

2. The double-sided contact valve rubber according to claim 1, characterized in that: The valve core (2) performs piston motion inside the valve seat (1), and the valve rubber body (3) is a circular ring structure.

3. The double-sided contact valve rubber according to claim 2, characterized in that: The valve rubber body (3) and the valve rubber body installation groove are fitted in an interference fit manner.

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