CN213574106U

CN213574106U - Elastic sealing gasket and duct piece

Info

Publication number: CN213574106U
Application number: CN202022571868.0U
Authority: CN
Inventors: 韩庆国; 冯国玉; 王立城; 庞明宝; 徐志敏; 祝立军; 李凡凯
Original assignee: Shandong Longxiang New Materials Technology Co ltd
Current assignee: Shandong Longxiang New Materials Technology Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-06-29
Anticipated expiration: 2030-11-09

Abstract

The utility model discloses an elastic sealing gasket and a duct piece, wherein the elastic sealing gasket comprises a body and a water-swelling rubber layer, wherein the body is of a cuboid-like structure, the cross section of the body is symmetrical about a central axis, the upper surface of the body is a sealing gasket contact surface, the lower surface is a shield duct piece contact surface, and the lower parts of two side edges respectively protrude outwards to form an inner convex inclined surface and an outer convex inclined surface; an even number of through holes are constructed in the body, the through holes are symmetrically arranged around a central shaft, and grooves are formed in the contact surface of the shield segment; the water-swelling rubber layer is embedded on the contact surface of the sealing gasket or attached to the surface of the outer convex inclined plane. Elastic sealing pad is around inlaying at the section of jurisdiction side, makes two section of jurisdiction concatenations after the extrusion between two sections of jurisdiction, has ageing-resistant and meets the water after-expansion from the special properties of stagnant water, has improved sealed stability and the persistence of filling up, realizes sealed stagnant water dual fail-safe between the section of jurisdiction of engineering pipeline.

Description

Elastic sealing gasket and duct piece

Technical Field

The utility model relates to a seam waterproof sealing technical field of underground works pipeline, concretely relates to elastic sealing pad and section of jurisdiction.

Background

In foundation engineering, such as underground facilities, tunnels, culverts, water conservancy, subways and other engineering, large pipelines are usually formed by splicing a plurality of arc-shaped pipe pieces, and waterproof sealing is required to be performed at joints of the pipe pieces. Particularly in the design of sealing gaskets for subways and tunnels, the sealing gaskets are required to have the characteristics of excellent aging resistance, chemical medium resistance, ozone resistance, good rebound resilience, high compressive strength, small compression deformation and the like, and meanwhile, the sealing gaskets are required to have excellent antibacterial erosion resistance, are particularly not easy to cause stress relaxation and deformation due to long-term compression, and have good waterproof property, water stopping property and long-term property.

In some areas, due to large temperature difference in four seasons, such as northeast, high temperature in summer, uninterrupted rainwater, low temperature in winter, long icing time and severe underground environment, higher requirements on the aging resistance and the waterproof performance of the sealing gasket are provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stability and the higher elastic sealing pad of persistence, and inlay the section of jurisdiction that has this sealed pad.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

an elastic sealing gasket comprises a body and a water-swelling rubber layer, wherein the body is of a cuboid-like structure, the cross section of the body is symmetrical about a central axis, the upper surface of the body is a sealing gasket contact surface, the lower surface of the body is a shield segment contact surface, and the lower parts of two side edges respectively protrude outwards to form an inner convex inclined surface and an outer convex inclined surface; an even number of through holes are constructed in the body, the through holes are symmetrically arranged around a central shaft, and grooves are formed in the contact surface of the shield segment; the water-swelling rubber layer is embedded on the contact surface of the sealing gasket or attached to the surface of the outer convex inclined plane.

Preferably, in the elastic gasket, the water-swellable rubber layer is fitted to the gasket contact surface, and the water-swellable rubber is fitted to the center of the gasket contact surface.

Preferably, in the above elastic gasket, a cross section of the through hole is circular or triangular.

Preferably, in the elastic sealing gasket, the body is made of ethylene propylene diene monomer.

Preferably, in the above elastic gasket, the number of the grooves is plural, and each of the grooves has a uniform size.

The utility model provides a section of jurisdiction with above arbitrary elastic sealing pad, section of jurisdiction side structure has inlays the groove, and elastic sealing pad centers on and inlays in inlaying the groove.

Compared with the prior art, the utility model discloses following beneficial effect has:

the elastic sealing gasket has the special performance of ageing resistance and automatic water stopping through expansion after meeting water, the stability and the durability of the sealing gasket are improved, and double insurance of sealing and water stopping between the pipe pieces of the engineering pipeline is realized.

The symmetrical through hole structure can reduce the compressive stress during installation, has good compression stress relaxation resistance, and greatly prolongs the service life.

The elastic sealing gasket can be formed by co-extruding the body and the water-swelling rubber, belongs to a composite extrusion type, is easy to produce, and greatly saves energy consumption and reduces production cost.

The elastic sealing gasket can be used for large-diameter, large-depth buried and large-moisture subways and tunnels, and can utilize the excellent water stopping performance and weather resistance performance of the elastic sealing gasket in a wider temperature range.

Drawings

FIG. 1 is a schematic cross-sectional view of an elastic gasket in example 1;

FIG. 2 is a schematic cross-sectional view of the elastic gasket in example 2;

FIG. 3 is a schematic view of a tube sheet with four sides embedded with elastic gaskets.

In the figure:

1. the shield structure comprises a sealing gasket contact surface, 2 through holes, 3 grooves, 4 shield segment contact surfaces, 5 water-swelling rubber layers, 6 inner convex inclined surfaces and 7 outer convex inclined surfaces.

Detailed Description

The technical solutions of the present invention will be explained and explained in detail with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement the present invention.

Example 1

Please refer to fig. 1, which is a style of elastic sealing gasket, comprising a body and a water-swelling rubber layer, wherein the body is made of ethylene propylene diene monomer, and the water-swelling rubber layer is preferably made of natural rubber, so that the cost is low and the water-stopping effect is good.

The body is a cuboid-like structure, the cross section of the body is symmetrical about a central axis, the upper surface of the body is a sealing gasket contact surface 1, the lower surface of the body is a shield segment contact surface 4, the lower sides of two side edges respectively protrude outwards to form an inner convex inclined surface 6 and an outer convex inclined surface 7, and the convex inclined surfaces 6 and the outer convex inclined surfaces 7 are also symmetrical to each other. Wherein the outwardly convex ramp 7 faces outwardly of the tube sheet in use.

An even number of through holes 2 are formed in the body, the cross section of each through hole 2 is preferably circular, and the through holes 2 are symmetrically arranged around a central shaft, so that the compression stress during installation is reduced.

The shield segment contact surface 4 is provided with a plurality of grooves 3, and the grooves 3 are set to be consistent in size so as to reduce stress concentration and ensure product stability.

The water-swelling rubber layer 5 is embedded in the center of the sealing gasket contact surface 1.

Example 2

Referring to fig. 2, the overall structure is similar to that of embodiment 1, except that the cross section of the through hole 2 is triangular, and the water-swellable rubber layer 5 is attached to the surface of the outer convex inclined surface 7.

Referring to fig. 3, the duct piece has an arc-shaped sheet structure, the side edge of the duct piece is provided with an embedded groove, the elastic sealing gasket is cut into four long strips according to the length of the periphery of the duct piece, and two adjacent long strips are butted and embedded in the embedded groove in a surrounding manner. Wherein, shield constructs section of jurisdiction contact surface 4 contact and inlays the bottom in groove, and sealed pad contact surface 1 is towards the outside. After the two segments are spliced, the elastic sealing gasket is extruded between the two segments to play a role in waterproof sealing.

The inventive concept is explained in detail herein using specific examples, and the above description of the embodiments is only used to help understand the core idea of the present invention. It should be understood that any obvious modifications, equivalents and other improvements made by those skilled in the art without departing from the spirit of the present invention are intended to be included within the scope of the present invention.

Claims

1. An elastic sealing gasket is characterized by comprising a body and a water-swelling rubber layer, wherein,

the body is of a cuboid-like structure, the cross section of the body is symmetrical about a central axis, the upper surface of the body is a sealing gasket contact surface, the lower surface of the body is a shield segment contact surface, and the lower parts of two side edges respectively protrude outwards to form an inward convex inclined surface and an outward convex inclined surface; an even number of through holes are constructed in the body, the through holes are symmetrically arranged around a central shaft, and grooves are formed in the contact surface of the shield segment;

the water-swelling rubber layer is embedded on the contact surface of the sealing gasket or attached to the surface of the outer convex inclined plane.

2. The elastomeric gasket of claim 1 wherein the water-swellable rubber is embedded in the center of the gasket contact surface when the water-swellable rubber layer is embedded in the gasket contact surface.

3. The elastomeric gasket of claim 1, wherein the cross-section of the through-hole is circular or triangular.

4. The elastomeric gasket of claim 1 wherein the body is formed from ethylene propylene diene monomer.

5. The elastomeric gasket of claim 1 wherein said groove is plural, each groove being of uniform size.

6. A duct piece having the elastic sealing gasket according to claim 1, wherein the side surface of the duct piece is formed with a fitting groove, and the elastic sealing gasket is fitted around the fitting groove.