CN203641557U

CN203641557U - Double-layer sealing gasket

Info

Publication number: CN203641557U
Application number: CN201320798854.XU
Authority: CN
Inventors: 谢贺义
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-10-12
Filing date: 2013-12-03
Publication date: 2014-06-11
Anticipated expiration: 2023-12-03

Abstract

The utility model relates to a valve seal ring, in particular to a double-layer sealing gasket. The double-layer sealing gasket comprises a main sealing gasket body and is characterized by further comprising a standby leakproof ring. The diameter of the leakproof ring is slightly larger than that of the main sealing gasket body; the main sealing gasket body and the leakproof ring are arranged concentrically and are connected fixedly. Since the leakproof ring is arranged on the outer side of the main sealing gasket body and is provided with anti-crack notches, the leakproof ring protects against leakage standby when a ball valve spool is stressed suddenly to squeeze and deform the main sealing gasket body, and the standby leakproof ring is prevented from being cracked on matter how the valve spool is squeezed; due to the anti-crack design of the anti-crack notches, different parts divided by the notches function as auxiliary leakproof parts, and sealing effect is good while service life of the sealing gasket is prolonged.

Description

A kind of double-layer seal packing ring

Technical field

The utility model relates to a kind of seal ring of valve, especially a kind of double-layer seal packing ring.

Background technique

Ball valve is a kind of spheroid open-shut device, driven by valve rod, and the valve rotating around the axis of valve rod.Be mainly used in blocking or connecting the medium in pipeline, also can be used for adjusting and the control of fluid, wherein firmly seal between its V-type ball core of V-type ball valve and the metal seat valve of pile-up welding hard alloy and there is very strong shearing force, be specially adapted to the medium such as fibre-bearing, small solid particle.And multi-pass ball valve not only switching of the interflow of control media, shunting and the flow direction flexibly on pipeline, the while also can be closed arbitrary passage and two other passage is connected, and ball valve generally should level be installed in pipeline.Ball valve is divided into: pneumatic ball valve, electric ball valve, manual ball valve.

The spool of ball valve is spheroid, valve a seal ring is all set up and down, seal ring is single layer structure, contact with spool spherical surface, prevent dielectric leakage, but in some cases, spool can be subject to the crunch of a direction, cause spool crush seal circle, thereby make sealed ring deformation, even fracture, thus affect the sealing effect of seal ring, dielectric leakage, affects valve working life.

Summary of the invention

The purpose of this utility model is, a kind of simple in structure, double-layer seal packing ring of having leakage proof structure for subsequent use, long service life is provided.

The utility model solves the technological scheme that its technical problem adopts: a kind of double-layer seal packing ring, comprise primary seal packing ring, characterized by further comprising anti-leakage ring for subsequent use, anti-leakage ring slightly larger in diameter is in primary seal packing ring, primary seal packing ring arranges with anti-leakage ring is concentric, and is fixedly connected with anti-leakage ring.

Of the present utility modelly further be set to: on the seal ring of a seal washer ring-type, offer a uniform axial annular recess, the internal side wall of circular groove is as primary seal packing ring, and exterior side wall is as anti-leakage ring.

Of the present utility modelly further be set to: also comprise anti-tear mouthful, four openings are evenly set on anti-leakage ring as anti-tear mouthful.

Said structure arranges an anti-leakage ring outward at primary seal packing ring; and on anti-leakage ring, arrange anti-tear mouthful; when ball valve core suddenly stressed by the extrusion-deformation of primary seal packing ring; due to the protective action of anti-leakage ring, can play the effect of leakproof for subsequent use, and how spool pushes and anti-leakage ring for subsequent use can not torn; due to the anti-tear design of anti-tear mouthful; the each several part of separation can be played to the effect of auxiliary leakage prevention sheet, therefore good sealing effect, has extended working life of seal washer.

Brief description of the drawings

Fig. 1 is the structural representation of the present embodiment;

Fig. 2 is the sectional drawing of the present embodiment;

Embodiment

Known with reference to figure 1, Fig. 2, a kind of double-layer seal packing ring, on the seal ring 1 of a seal washer ring-type, offer a uniform axial annular recess 11, the internal side wall of circular groove 11 is as primary seal packing ring 12, exterior side wall, as anti-leakage ring 13, evenly arranges four openings as anti-tear mouthful 14 on anti-leakage ring 13.

Double-layer seal packing ring is to contact with the spherical surface of ball valve core, therefore the pressure bearing when double-layer seal packing ring is from substantially horizontal and the Vertical direction of double-layer seal packing ring, and the pressure of Vertical direction can not destroy seal ring, and the extruding of substantially horizontal, be easy to allow seal washer be out of shape, and the utility model when in use, even if the extruding of substantially horizontal allows primary seal gasket deforms, the elasticity of anti-leakage ring still can keep sealing, and in the middle of the groove offered, there is buffer function, increase the elasticity of double-layer seal packing ring, with extruding strength, owing to being all wholely set, therefore level extruding can allow traditional seal washer produce slight crack, and the utility model is due to this elastic characteristic, substantially there will not be slight crack, even in the moment of extruding, due to the extension of anti-leakage ring, also there will not be the phenomenon of moment leakage, keep stable sealing effect, and the design of anti-tear mouthful, also ensure that the utility model is in being subject to level extruding short time set, protection anti-leakage ring can not be torn, even cause anti-leakage ring to lose the phenomenon of drip-preventing function, therefore, the utility model is simple in structure, there is leakage proof structure for subsequent use, even if primary seal gasket deforms still can continue to use, long service life.

Obviously, above-described embodiment is only used to done giving an example is clearly described, and the not restriction to mode of execution.To those of ordinary skill in the art, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all mode of executions.And the apparent variation of being extended out thus or variation are still in protection domain of the present utility model.

Claims

1. a double-layer seal packing ring, comprises primary seal packing ring, it is characterized in that: also comprise anti-leakage ring for subsequent use, anti-leakage ring slightly larger in diameter is in primary seal packing ring, and primary seal packing ring arranges with anti-leakage ring is concentric, and is fixedly connected with anti-leakage ring.

2. according to double-layer seal packing ring claimed in claim 1, it is characterized in that: on the seal ring of a seal washer ring-type, offer a uniform axial annular recess, the internal side wall of circular groove is as primary seal packing ring, and exterior side wall is as anti-leakage ring.

3. according to the double-layer seal packing ring described in claim 1 or 2, it is characterized in that: also comprise anti-tear mouthful, four openings are evenly set on anti-leakage ring as anti-tear mouthful.