CN212131278U

CN212131278U - Integrated anti-backpressure lip-shaped sealing ring

Info

Publication number: CN212131278U
Application number: CN201921616378.9U
Authority: CN
Inventors: 董惠刚
Original assignee: Kaifulong Xiamen Sealing Element Co ltd
Current assignee: Kaifulong Xiamen Sealing Element Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-12-11
Anticipated expiration: 2029-09-26

Abstract

The utility model provides an anti backpressure lip seal of integral type, including the lip circle body, the lip circle body includes inner lip, outer lip, is located the annular depression portion between inner lip and the outer lip, be equipped with U type elasticity reed and a supporting ring in the annular depression portion, the lip mouth of the lip circle body is faced to the opening of U type elasticity reed, U type elasticity reed props the inside wall of connecing at inner lip and outer lip and exerts pressure for inner lip and outer lip, supporting ring one end with the flexion rigid coupling of U type elasticity reed, the other end stretches out lip circle body lip outside. The utility model has simple structure and reasonable design, and can be used for sealing connection which needs to bear the forward pressure and the back pressure in opposite directions simultaneously, wherein, the U-shaped elastic reed can improve the sealing performance on one hand and can also increase the pressure bearing capacity of the main body on the other hand; when the positive pressure disappears, the support ring can prevent the back pressure from damaging the sealing ring body.

Description

Integrated anti-backpressure lip-shaped sealing ring

Technical Field

The utility model relates to a sealing member field particularly, relates to an anti backpressure lip seal of integral type.

Background

In many applications, the sealing structure is designed to only act as a single piston when facing the pressure of the unidirectional system, but in some applications, besides the forward pressure, a reverse system pressure opposite to the forward pressure may exist in the system, such as a fixed ball valve seat seal, and the sealing structure therein simultaneously bears the forward pressure and the reverse pressure opposite to each other, and when the forward pressure disappears suddenly, the existence of the reverse pressure impacts the sealing member from the back, so that the sealing member with the unidirectional function is damaged from the back.

In view of the above, the inventor of the present application invented an integrated anti-back pressure lip-shaped seal ring.

Disclosure of Invention

An object of the utility model is to provide a simple structure, reasonable in design can be used to need to bear opposite direction's forward pressure and the anti back pressure lip seal of integral type of the pressure seal connection dorsad simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides an anti backpressure lip seal of integral type, includes the lip circle body, the lip circle body includes inner lip, outer lip, is located the annular depressed part between inner lip and the outer lip, be equipped with U type elasticity reed and a supporting ring in the annular depressed part, the lip mouth of the lip circle body is faced to the opening of U type elasticity reed, U type elasticity reed props the inside wall of connecing at inner lip and outer lip and applys pressure for inner lip and outer lip, supporting ring one end with the flexion rigid coupling of U type elasticity reed, the other end stretches out lip circle body lip mouth outside.

Furthermore, the corners of the two end parts of the support ring are round corners.

Furthermore, the free ends of the inner lip and the outer lip extend towards the annular concave part to form annular bosses, and the U-shaped elastic spring leaf is connected to the two annular bosses in a supporting mode.

Further, the U-shaped elastic spring is formed by stamping a flat metal sheet through a die to form an annular elastic component with a U-shaped section.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model has simple structure and reasonable design, can be used for sealing connection which needs to bear the forward pressure and the back pressure in opposite directions simultaneously, wherein the U-shaped elastic reed can provide stress compensation, realize radial compensation and provide sealing pressure from inside to outside, on one hand, the U-shaped elastic reed can improve the sealing performance and can also increase the pressure bearing capacity of the main body; when the positive pressure disappears, the support ring can prevent the back pressure from damaging the sealing ring body.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a cross-sectional view of the sealing ring of the present invention;

fig. 2 is a sectional view of the lip ring body of the present invention.

Description of the main elements

10-a lip-shaped ring body,

11-the inner lip of the body,

12-the outer lip of the body,

13-the part of the ring-shaped recess,

14-a ring-shaped boss which is provided with a plurality of grooves,

15-the annular projection is arranged on the inner wall of the groove,

the 20-U-shaped elastic spring leaf is provided with a spring leaf,

30-support ring.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1 to 2, the present invention discloses an integrated anti-backpressure lip seal ring, which is mainly applied to a sealing joint that needs to bear forward pressure and backpressure in opposite directions, and includes a lip ring body 10, the lip ring body 10 includes an inner lip 11, an outer lip 12, and an annular recess 13 located between the inner lip 11 and the outer lip 12, one side of the inner lip 11 and the outer lip 12 located in the annular recess 13 is an inner side, one side of the inner lip 11 and the outer lip 12 correspondingly located in the annular recess 13 is an outer side, the annular recess 13 is internally provided with a U-shaped elastic spring 20 and a supporting ring 30, an opening of the U-shaped elastic spring 20 faces a lip opening of the lip ring body 10, the U-shaped elastic spring 20 supports and connects to the inner side wall of the inner lip 11 and the outer lip 12 and applies pressure to the inner lip 11 and the outer lip 12, specifically, the free ends of the inner lip 11 and the outer lip 12 extend towards the annular recess 13 to be provided with an annular boss 14, the U-shaped spring leaf 20 is supported on the two annular bosses 14, the U-shaped spring leaf 20 forces the outer side walls of the inner lip 11 and the outer lip 12 to tightly adhere to the surface of the sealed piece, thereby forming a seal for the sealed piece, one end of the support ring 30 is fixedly connected with the bending part of the U-shaped spring leaf 20, concretely, the support ring 30 is a metal support ring 30 which is uniformly welded at the bending part of the U-shaped spring leaf 20 by spot welding at eight points in the circumferential direction, the other end of the support ring 30 extends out of the lip body 10, when the sealing ring is installed, the lip of the lip body 10 is positioned at the front, the sealing end of the lip body 10 is correspondingly positioned at the back, so that when the forward pressure (the pressure applied to the sealing ring from the front) disappears suddenly, the backward pressure (the pressure applied to the sealing ring from the back) impacts the sealed piece from the back, the metal support ring 30 is, the supporting function can protect the lip of the sealing ring body from being damaged.

The corners of the two ends of the support ring 30 are rounded corners, and the rounded corners can prevent the support ring 30 from scratching the sealed piece.

All be equipped with annular bulge 15 on the lateral wall of interior lip 11 and outer lip 12, and annular bulge 15's cross-section is the closed angle, and annular bulge 15 hugs closely on the surface by the sealing member when U type elastic reed 20 applys pressure for interior lip 11 and outer lip 12, and sealed effect is better.

The U-shaped spring reed 20 is formed by punching a flat metal sheet through a die to form a circular ring-shaped spring member having a U-shaped cross section. The U-shaped spring reed 20 is formed by stamping a plurality of flat metal sheets through a die to form an elastic component with a U-shaped cross section, and is bent and then sequentially connected into a circular ring shape in a welding mode, the opening width of the U-shaped spring reed 20 is gradually increased from the bending part to the two free ends, and the opening width of the two free ends of the U-shaped spring reed 20 is slightly larger than that of the lip ring body 10.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an anti backpressure lip seal of integral type, its characterized in that, includes the lip circle body, the lip circle body includes inner lip, outer lip, is located the annular depressed part between inner lip and the outer lip, be equipped with U type elasticity reed and a supporting ring in the annular depressed part, the lip mouth of the lip circle body is faced to the opening of U type elasticity reed, U type elasticity reed props the inside wall that connects at inner lip and outer lip and applys pressure for inner lip and outer lip, supporting ring one end with the flexion rigid coupling of U type elasticity reed, the other end stretches out lip circle body lip mouth outside.

2. The integrated backpressure-resistant lip seal of claim 1, wherein corners of the two ends of the support ring are rounded.

3. The integrated anti-backpressure lip seal ring as claimed in claim 1 or 2, wherein the free ends of the inner lip and the outer lip are provided with annular bosses extending towards the inside of the annular concave part, and the U-shaped elastic spring piece is supported and connected to the two annular bosses.

4. The integrated backpressure-resistant lip seal according to claim 1 or 2, wherein the U-shaped elastic spring is formed by punching a flat metal sheet through a die to form an annular elastic part with a U-shaped section.