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Middle shield and tail shield connecting structure

A technology of connection structure and tail shield, which is applied in the direction of engine sealing, control valve, functional valve type, etc., can solve the problems such as the decline of sealing effect of the sealing ring, the entry of mud and water, and the failure, so as to achieve the improvement of sealing reliability and good sealing effect. Effect

Inactive Publication Date: 2015-12-02
CHONGQING TENGHAN IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of sealing ring is that the hardening and cracking of the sealing ring, cracks and wear of the lip of the sealing ring will cause the sealing effect of the sealing ring to decrease or even fail, and muddy water will enter the shield body

Method used

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  • Middle shield and tail shield connecting structure
  • Middle shield and tail shield connecting structure
  • Middle shield and tail shield connecting structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Instructions attached figure 1 , figure 2 The reference signs in include: middle shield 1, tail shield 2, jack 3, front sealing groove 4, rear sealing groove 5, inflatable air bag 6, L-shaped compression plate 7, asbestos graphite stuffing box 8.

[0017] basically as figure 1 , figure 2 Shown: the connection structure of the middle shield and the tail shield. The inner surfaces of the middle shield 1 and the tail shield 2 are respectively welded with the middle shield 1 lug plate and the tail shield 2 lug plate. The tail shield has 2 lug plates hinged.

[0018] The inner surface of the rear end of the middle shield 1 and the outer surface of the front end of the tail shield 2 are pressed against each other. The front sealing surface of the tail shield 2 is sequentially opened with a front sealing groove 4 and a rear sealing groove 5 from front to back, and the rear sealing groove 5 is installed with Inflatable air bag 6, this inflatable air bag 6 can be close to ...

Embodiment 2

[0021] Instructions attached image 3 , Figure 4 The reference signs in include: middle shield 1, tail shield 2, jack 3, front sealing groove 4, rear sealing groove 5, inflatable air bag 6, multi-lip sealing ring 7.

[0022] basically as image 3 , Figure 4 As shown in the connection structure of the middle shield and the tail shield, the inner surfaces of the middle shield 1 and the tail shield 2 are respectively welded with the ear plate of the middle shield 1 and the ear plate of the tail shield 2, and the two ends of the jack 3 are connected with the ear plates of the middle shield 1, The tail shield has 2 lug plates hinged.

[0023] The inner surface of the rear end of the middle shield 1 and the outer surface of the front end of the tail shield 2 are pressed against each other. The front sealing surface of the tail shield 2 is sequentially opened with a front sealing groove 4 and a rear sealing groove 5 from front to back, and the rear sealing groove 5 is installed ...

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PUM

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Abstract

The invention belongs to the technical field of tunneling protection plates of tunneling equipment and discloses a middle shield and tail shield connecting structure. The middle shield and tail shield connecting structure comprises a middle shield and a tail shield hinged to the middle shield through a jack, the inner side face of the rear end of the middle shield abuts against the outer side face of the front end of the tail shield, and a front sealing groove and a rear sealing groove are sequentially formed in the abutting-against face of the front end of the tail shield from front to back. A seal ring or stuffing box is arranged inside the front sealing groove, and an inflatable airbag is arranged inside the rear sealing groove. Compared with a traditional middle shield and tail shield connecting structure, sealing reliability is high.

Description

technical field [0001] The invention belongs to the technical field of tunneling protection plates for tunneling equipment. Background technique [0002] The shell of the shield body of the shield machine is divided into three sections: the front shield, the middle shield and the tail shield (usually called the incision ring, the support ring, and the tail shield) from front to back in the longitudinal direction. The main structure is the skeleton that bears all the loads acting on the shield. The front shield and the middle shield are tightened and welded with bolts. The outer edge of the middle shield is equipped with a shield jack for hinged back shield. The hinges at both ends of the shield jack are spherical hinges to ensure that there is a certain swing angle between the axis of the shield jack and the axis of the shield machine, so that the shield body It is more flexible when digging in complex formations. [0003] The hinges of the existing middle shield and tail ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/06F16K15/10
Inventor 丁丽霞
Owner CHONGQING TENGHAN IND & TRADE