Bolt washer for water prevention of shield tunnel segment bolt hole
A technology of shield tunnel segments and bolt gaskets, which is applied in the direction of gaskets, connecting components, mechanical equipment, etc., can solve the problems of waste of material and manpower, increased resistance torque, uneven pressure of bolt rubber sealing rings, etc., and achieve good waterproof effect , reducing the effect of rotation
Pending Publication Date: 2020-11-27
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
[0003] The above washer can move independently with the bolt rubber sealing ring when the tightening degree is small, but as the bolt is gradually tightened, the washer will gradually squeeze the bolt rubber sealing ring, and the friction force on the washer will also increase accordingly. The resistance torque will be provided to increase the resistance torque, thereby increasing the torque required to tighten the bolts, resulting in a waste of material and manpower
[0004] When the friction force is further increased, the washer will drive the bolt rubber sealing ring below to produce torsional deformation. After the torsion deformation, the bolt rubber sealing ring is under uneven pressure, and it is difficult to fully fill the gap between the bolt end and the bolt hole. The formation of seepage channels is not conducive to the waterproofing of shield tunnels
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[0024] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.
[0025] In this disclosure, unless stated otherwise, the used orientation words such as "up, down" are generally defined based on the orientation or positional relationship shown in the drawings, specifically refer to figure 1 The directions shown in the drawings are combined with the positional relationship of corresponding components in other drawings. In addition, the terms "first", "second", and the like used in the present disclosure are for distinguishing one element from another, and do not have sequence or importance. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or simila...
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The invention discloses a bolt washer for water prevention of a shield tunnel segment bolt hole. The bolt washer comprises an inner ring and an outer ring, the outer ring is arranged on the outer sideof the inner ring in a sleeving mode, the inner ring and the outer ring can be connected in a relatively rotating mode, the outer ring makes contact with a nut, and the inner ring makes contact witha sealing ring; annular first grooves are formed in the opposite faces of the inner ring and the outer ring along the opposite faces, and the two sides of balls are embedded into the first grooves ofthe inner ring and the outer ring respectively. According to the bolt washer for water prevention of the shield tunnel segment bolt hole, when a bolt is screwed, rolling friction is formed between theinner ring and the balls, so that the torque provided for screwing the bolt is greatly reduced; and the inner ring and the outer ring of the bolt washer move independently, so that the situation thata shield tunnel leaks water along a gap between the bolt and the bolt hole due to the fact that a bolt rubber sealing ring twists under the driving of the washer and a water seepage channel is easilyformed after the twisted sealing ring is compressed can be avoided.
Description
technical field [0001] The invention relates to the technical field of shield tunnel engineering, in particular to a shield tunnel segment connecting bolt washer. Background technique [0002] At present, the domestic shield tunnel segment bolt washers are mainly metal washers, and the washers are in the form of flat washers, spring washers, wave washers, toothed washers, etc., among which flat washers are the most common. The main functions of gaskets include "decompression", "increase friction", "sealing" and "fixation". In the shield tunnel, by adding gaskets at the bolt head and nut to avoid excessive local pressure on the segment, and to compress the waterproof sealing ring at the bolt hole to prevent the assembly between the bolt and the bolt hole Water seepage in the gap. In the process of tightening the bolts, the addition of gaskets can also reduce the scratches of the bolts on the waterproof sealing ring; compared with not adding gaskets, it can make the waterpro...
Claims
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IPC IPC(8): F16B43/00
CPCF16B43/002F16B43/001
Inventor 何川王士民李拼黄兴马天宇谢宏明
Owner SOUTHWEST JIAOTONG UNIV