CN214744073U

CN214744073U - Multilayer sealing rubber ring suitable for pipe joint

Info

Publication number: CN214744073U
Application number: CN202022944998.4U
Authority: CN
Inventors: 朱瑞霞
Original assignee: Hebei Quanen High Tech Pipe Co ltd
Current assignee: Hebei Quanen High Tech Pipe Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-11-16
Anticipated expiration: 2030-12-11

Abstract

A multi-layer sealing rubber ring suitable for a pipe joint comprises a sealing ring body, a steel skeleton, a main sealing convex surface, a secondary sealing convex surface and an auxiliary sealing convex surface; the sealing ring body is embedded in the groove on the inner wall of the auxiliary sealing convex surface; the cross section of the sealing ring body is approximately triangular, the bottom edge of the approximately triangular shape is parallel to the axial lead of the pipe, and the other two bevel edges of the approximately triangular shape are in close contact with the groove on the inner wall of the auxiliary sealing convex surface; the steel skeleton is annular, is arranged in the sealing ring body and is attached to the circumferential surface of the section of the sealing ring body, which is similar to the bevel edge of a triangle; the auxiliary sealing convex surface is arranged on the circumferential surface where the bottom edge of the section of the sealing ring body is positioned, which is similar to a triangle, along the circumferential line direction of the sealing ring body; the main sealing convex surface and the secondary sealing convex surface are arranged on the same surface, and the main sealing convex surface and the secondary sealing convex surface are respectively arranged on two sides of the secondary sealing convex surface. The utility model provides high sealing washer's life and leakproofness.

Description

Multilayer sealing rubber ring suitable for pipe joint

Technical Field

The utility model relates to a steel skeleton rubber gasket, especially a multilayer rubber gasket who is applicable to the tubular product of sealing washer integrated into one piece flaring structure and connects department belongs to plumbing tubular product technical field.

Background

In the process of rapid development of municipal water supply and drainage pipeline systems, the PVC pipe with the seal ring integrally formed flaring structure occupies a considerable proportion of the municipal water supply and drainage pipeline system due to the excellent performance of the PVC pipe; one end of the PVC pipe is flared, and then the steel skeleton rubber sealing ring is embedded into the flaring groove while flaring is carried out, so that an integrally formed sealing interface structure is formed, and the sealing ring at the interface can not be separated under the non-destructive condition, so that the sealing property at the interface is ensured; the service life of the PVC pipe can reach one hundred years, and for municipal water supply and drainage projects, the longer the PVC is used, the lower the maintenance cost is; the inner wall of the existing sealing ring is generally provided with a tiny bulge except a main sealing surface to assist the sealing performance; however, for the pipe under high pressure, the pressure of the sealing ring becomes large, the sealing ring can gradually generate stress relaxation along with the time, and the single micro-bulge obviously cannot meet the requirement of auxiliary sealing performance at the joint of the pipe, so that the service life of the sealing ring is influenced; therefore, a sealing ring is needed, which is capable of further enhancing the sealing performance of the sealing ring and prolonging the service life of the sealing ring.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a multilayer sealing rubber ring that PVC tubular product suitable for sealing washer integrated into one piece flaring structure connects, it not only can improve the life of sealing washer, can also improve the leakproofness.

The problem is solved through following technical scheme:

a multi-layer sealing rubber ring suitable for a pipe joint comprises a sealing ring body, a steel skeleton, a main sealing convex surface, a secondary sealing convex surface and an auxiliary sealing convex surface; the sealing ring body is embedded in a groove on the inner wall of the pipe joint; the section of the sealing ring body is approximately triangular, the bottom edge of the approximately triangular shape is parallel to the axial lead of the pipe, and the other two bevel edges of the approximately triangular shape are in close contact with the groove on the inner wall of the pipe joint; the steel skeleton is annular, is arranged in the sealing ring body and is attached to the circumferential surface of the section of the sealing ring body, which is similar to the bevel edge of a triangle; the auxiliary sealing convex surface is arranged on the circumferential surface where the bottom edge of the section of the sealing ring body is positioned, which is similar to a triangle, along the circumferential line direction of the sealing ring body; the main sealing convex surface, the secondary sealing convex surface and the auxiliary sealing convex surface are arranged on the same surface, and the main sealing convex surface and the secondary sealing convex surface are respectively arranged on two sides of the auxiliary sealing convex surface.

In the multilayer sealing rubber ring suitable for the pipe joint, the circumferential diameter surrounded by the edges of the outermost edges of the main sealing convex surfaces is larger than or equal to the circumferential diameter surrounded by the edges of the outermost edges of the auxiliary sealing convex surfaces; the diameter of the circumference surrounded by the outermost edge of the auxiliary sealing convex surface is larger than or equal to the diameter of the circumference surrounded by the outermost edge of the secondary sealing convex surface.

The above-mentioned multilayer sealing rubber ring suitable for tubular product connects, the cross-section of main sealing convex surface, secondary sealing convex surface and supplementary sealing convex surface is the arc surface, and the radius of the arc surface of main sealing convex surface cross-section is greater than or equal to the radius of the arc surface of supplementary sealing convex surface cross-section, and the radius of the arc surface of supplementary sealing convex surface cross-section is greater than or equal to the radius of the arc surface of secondary sealing convex surface.

The sealing mechanism combining the main sealing convex surface, the auxiliary sealing convex surface and the secondary sealing convex surface increases the sealing performance of the pipe; under lower pressure, the main sealing convex surface is used as the main sealing surface, and for a pipe with larger water pressure, the auxiliary sealing convex surface and the secondary sealing convex surface are sequentially overlapped to play a sealing role after the main sealing surface is partially relaxed along with long-time use, so that the service life of the sealing ring is prolonged, and the sealing property is also ensured.

Drawings

FIG. 1 is a schematic view of the structure of the utility model in use;

fig. 2 is a schematic view of the cross-sectional structure of the present invention.

The list of labels in the figure is: 1. the sealing ring comprises a sealing ring body, 2 parts of a steel skeleton, 3 parts of a main sealing convex surface, 4 parts of a secondary sealing convex surface, 5 parts of an auxiliary sealing convex surface, 6 parts of a pipe joint, 7 parts of a bottom edge and 8 parts of a bevel edge.

Detailed Description

Referring to fig. 1 and 2, the sealing ring comprises a sealing ring body 1, a steel framework 2, a main sealing convex surface 3, a secondary sealing convex surface 4 and an auxiliary sealing convex surface 5; the sealing ring body 1 is embedded in a groove on the inner wall of the pipe joint 6; the cross section of the sealing ring body 1 is approximately triangular, the bottom edge 7 of the approximately triangular shape is parallel to the axial lead of the pipe, and the other two bevel edges 8 of the approximately triangular shape are tightly contacted with the groove on the inner wall of the pipe joint 6; the steel skeleton 2 is annular, is arranged in the sealing ring body 1 and is attached to the circumferential surface of the sealing ring body 1, the section of which is similar to the position of the triangular bevel edge 8; the steel skeleton 2 is used for forming the sealing ring body 1, so that the sealing ring body 1 is prevented from deforming in the flaring process; the auxiliary sealing convex surface 5 is arranged on the circumferential surface of the sealing ring body 1, the cross section of which is similar to the position of the bottom edge 7 of a triangle, along the circumferential line direction of the sealing ring body 1; the main sealing convex surface 3, the secondary sealing convex surface 4 and the auxiliary sealing convex surface 5 are arranged on the same surface, and the main sealing convex surface 3 and the secondary sealing convex surface 4 are respectively arranged on two sides of the auxiliary sealing convex surface 5.

The diameter of the circumference surrounded by the outermost edge of the main sealing convex surface 3 is larger than or equal to the diameter of the circumference surrounded by the outermost edge of the auxiliary sealing convex surface 5; the diameter of the circumference surrounded by the outermost edge of the auxiliary sealing convex surface 5 is larger than or equal to the diameter of the circumference surrounded by the outermost edge of the secondary sealing convex surface 4; this ensures that the pipe joint 6 can be sealed by the seal rings of the primary convex sealing surface 3, the primary convex sealing surface 3 and the secondary convex sealing surface 4 in this order when slightly expanded with an increase in water pressure, and the number of seal surfaces is increased one by one, thereby improving the sealing performance.

The sections of the main sealing convex surface 3, the secondary sealing convex surface 4 and the auxiliary sealing convex surface 5 are all arc surfaces, the radius of the arc surface of the section of the main sealing convex surface 3 is larger than or equal to that of the arc surface of the section of the auxiliary sealing convex surface 5, and the radius of the arc surface of the section of the auxiliary sealing convex surface 5 is larger than or equal to that of the arc surface of the secondary sealing convex surface 4; the cross sections of the primary convex sealing surface 3, the secondary convex sealing surface 4 and the secondary convex sealing surface 5 may be sealing surfaces of other structures as long as the sealing surfaces can play a sealing role.

The sealing ring body 1 and each sealing convex surface are made of styrene butadiene rubber or ethylene propylene diene monomer.

The design of the structure realizes a main and two auxiliary sealing structure of the main sealing convex surface 3 of the steel skeleton sealing ring, and when the pressure intensity of water pressure in the pipe joint 6 is small, the main sealing convex surface 3 is taken as a main sealing surface to directly provide sealing closure for the pipe joint 6 surrounded by the main sealing convex surface; when water pressure grow, tubular product connects 6 inflation under the effect of water under high pressure to 3 deformations of extrusion main seal convex surface are inwards sunken, contact supplementary sealed convex surface 5 until tubular product connects 6 outer walls, and supplementary sealed convex surface 5 provides the second and heavily seals the effect, has ensured that the water under high pressure does not reveal, further improves when water pressure, and tubular product connects 6 to touch and presses inferior sealed convex surface 4, and triple sealing face provides sealedly for tubular product connects 6 this moment, has greatly improved sealing reliability.

When the main sealing surface is applied along with a pipeline for a long time, partial stress relaxation can be generated, the sealing effect is weakened, and under the condition, the auxiliary sealing surface can play a vital good sealing effect, so that the longer service life is ensured.

Claims

1. The utility model provides a multilayer sealing rubber ring suitable for tubular product connects which characterized in that: comprises a sealing ring body (1), a steel skeleton (2), a main sealing convex surface (3), a secondary sealing convex surface (4) and an auxiliary sealing convex surface (5); the sealing ring body (1) is embedded in a groove on the inner wall of the pipe joint (6); the cross section of the sealing ring body (1) is approximately triangular, the bottom edge (7) of the approximately triangular shape is parallel to the axial lead of the pipe, and the other two bevel edges (8) of the approximately triangular shape are tightly contacted with the groove on the inner wall of the pipe joint (6); the steel skeleton (2) is annular, is arranged in the sealing ring body (1), and is attached to the circumferential surface of the sealing ring body (1) with the section similar to the triangular bevel edge (8); the auxiliary sealing convex surface (5) is arranged on the circumferential surface where the bottom edge (7) of the cross section of the sealing ring body (1) is approximately triangular along the circumferential line direction of the sealing ring body (1); the main sealing convex surface (3), the secondary sealing convex surface (4) and the auxiliary sealing convex surface (5) are arranged on the same surface, and the main sealing convex surface (3) and the secondary sealing convex surface (4) are respectively arranged on two sides of the auxiliary sealing convex surface (5).

2. The multi-layer sealant ring suitable for use in a pipe joint according to claim 1, wherein: the circumferential diameter surrounded by the outermost edge of the main sealing convex surface (3) is larger than or equal to the circumferential diameter surrounded by the outermost edge of the auxiliary sealing convex surface (5); the circumferential diameter surrounded by the outermost edge of the auxiliary sealing convex surface (5) is larger than or equal to the circumferential diameter surrounded by the outermost edge of the secondary sealing convex surface (4).

3. The multi-layer sealant ring suitable for use in a pipe joint according to claim 2, wherein: the cross-section of main sealing convex surface (3), secondary sealing convex surface (4) and auxiliary sealing convex surface (5) is the arc surface, and the radius of the arc surface of main sealing convex surface (3) cross-section is greater than or equal to the radius of the arc surface of auxiliary sealing convex surface (5) cross-section, and the radius of the arc surface of auxiliary sealing convex surface (5) cross-section is greater than or equal to the radius of the arc surface of secondary sealing convex surface (4).