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Tube sheet waterproof sealing gasket

A waterproof gasket and gasket technology, used in wellbore lining, tunnel lining, underground chambers, etc., can solve the problem of inability to comprehensively prevent the leakage of mud and water, so as to facilitate embedding of water-swelling materials, improve extrusion force, strengthen The effect of glue adhesion

Active Publication Date: 2020-06-16
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a segment waterproof gasket, which solves the problem that the existing segment gasket cannot completely prevent muddy water from leaking from the contact surface between the gasket and the gasket, and the contact surface between the gasket and the sealing groove. , as well as the technical issues of continuing to provide effective squeeze

Method used

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  • Tube sheet waterproof sealing gasket
  • Tube sheet waterproof sealing gasket
  • Tube sheet waterproof sealing gasket

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, a kind of segment waterproof gasket, such as figure 1 As shown, it includes a gasket body 1 arranged in the segment sealing groove 4. The upper end surface of the gasket body 1 is provided with an upper water-swellable pad 2, and the lower end surface is provided with a lower water-swellable pad 3. The gasket body 1. The upper water-swellable pad 2 and the lower water-swellable pad 3 form a three-time water-stop structure. Such as figure 2 As shown, when the adjacent segments are squeezed against each other, the upper end surfaces of the adjacent gasket bodies 1 are attached to each other.

[0033] Such as image 3 As shown, when the gasket body 1 is assembled with the segments, at the same time, due to the ductility of the gasket body 1, it forms a first-level pre-tightening force after being squeezed, and plays the first water-stopping effect.

[0034] Such as Figure 4 As shown, when the water pressure on the gasket body 1 is too large or the segme...

Embodiment 2

[0036] Embodiment 2, a segment waterproof gasket, the first water-stopping effect is the same as that of Embodiment 1, which is ensured by the ductility of the gasket body 1 . The second water stop effect is as follows: Figure 6 As shown, when the water pressure on the gasket body 1 is too large or the segment joints are opened, the mutual extrusion force between the two gaskets at the ends of the two segments decreases, and the muddy water flows from the gasket body 1 The lower end face of the lower surface of the seal groove 4 penetrates between the bottom wall of the sealing groove 4 until it reaches the lower water-swellable pad 3, and the lower water-swellable pad 3 stimulates the expansion performance under the action of water, which improves the extrusion force between the gaskets, thereby Achieve the second water stop effect.

[0037] With the change of the external environment or / and the aging and deformation of the material itself, when the extrusion force excited ...

Embodiment 3

[0039] Embodiment 3, a segment waterproof gasket, the upper water-swellable gasket 2 is embedded on the upper end surface of the gasket body 1, and the lower water-swellable gasket 3 is embedded on the lower end surface of the gasket body 1.

[0040] The mosaic structure design of the bottom water-swellable pad 3 not only enables the bottom water-swellable pad 3 to be closed between the gasket body 1 and the bottom wall of the sealing groove 4, but also prevents the bottom water-swellable pad 3 from meeting before the segments are connected. Water swells, and only when the water pressure is too high or the segment joints are opened, muddy water will seep between the gasket body 1 and the bottom wall of the sealing groove 4, and the water-swellable pad 3 will be stimulated to expand when it encounters water.

[0041] The inlaid structure design of the upper water-swellable pad 2 makes the five surfaces of the upper water-swellable pad 2 wrapped in the gasket body 1, which effect...

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Abstract

The invention discloses a tube sheet waterproof sealing gasket which solves the technical problems that mud water cannot be comprehensively prevented from leaking from the contact surfaces of a sealing gasket and a sealing gasket and the contact surfaces of one sealing gasket and a sealing groove and effective squeezing force is difficult to continuously provide. The sealing gasket comprises a sealing gasket body arranged in a tube sheet sealing groove, an upper water-swellable pad is arranged on the upper end face of the sealing gasket body, a lower water-swellable pad is arranged on the lower end face of the sealing gasket body, and the sealing gasket body, the upper water-swellable pad and the lower water-swellable pad form a tertiary water stop structure. Both the upper end face and the lower end face of the sealing gasket body are embedded with the water-swellable pads, and when water leakage occurs at a tube sheet joint at the later stage, the swelling performance of the water-swellable pads is stimulated under the action of water, so that the squeezing force between the sealing gaskets is improved, and second and even third water stopping effects are achieved.

Description

technical field [0001] The invention belongs to the technical field of seals, in particular to a segment waterproof gasket. Background technique [0002] At present, shield tunnels are mostly ring-shaped structures assembled by prefabricated reinforced concrete segments and supplemented by bolt connections. The joints between rings and blocks are waterproofed by gaskets. Due to factors such as engineering geological conditions and construction quality level, the segment is prone to deformation, opening, misalignment, cracks, etc. during the construction process of the shield method, and there are often water leakage problems. According to the engineering assembly structure and actual leakage conditions, the leakage forms of shield tunneling are divided into four forms: annular joints, longitudinal joints, grouting holes, and segment bolt holes (hand holes). The reason for the waterproof failure of the segment joints is that when the water pressure is too high, the water pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/38
CPCE21D11/386
Inventor 毕程程王宁李洋于少辉白中坤李鹏
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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