CN212337869U

CN212337869U - Bolt washer for preventing bolt hole of shield tunnel segment from being water

Info

Publication number: CN212337869U
Application number: CN202022040806.7U
Authority: CN
Inventors: 何川; 王士民; 李拼; 黄兴; 马天宇; 谢宏明
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2020-09-17
Filing date: 2020-09-17
Publication date: 2021-01-12
Anticipated expiration: 2030-09-17

Abstract

The utility model discloses a be used for shield tunnel segment bolt hole waterproof bolt packing ring, including inner ring and outer loop, the outer loop suit is in the inner ring outside, and can rotate relatively between inner ring and the outer loop and be connected, outer loop and nut contact, inner ring and sealing washer contact. The opposite surfaces of the inner ring and the outer ring are provided with annular first grooves along the opposite surfaces, and the two sides of the ball are respectively embedded into the first grooves of the inner ring and the outer ring. The utility model has the advantages that the rolling friction between the inner ring and the ball when the bolt is screwed, which greatly reduces the torque provided by the screwed bolt; the motion of the inner ring and the motion of the outer ring of the bolt gasket are mutually independent, so that the bolt rubber sealing ring can be prevented from being twisted due to the driving of the gasket, and after the twisted sealing ring is compressed, a water seepage channel is easily formed, and further the water seepage condition of the shield tunnel along the gap between the bolt and the bolt hole is caused.

Description

Bolt washer for preventing bolt hole of shield tunnel segment from being water

Technical Field

The utility model relates to a shield tunnel engineering technical field especially relates to a shield tunnel section of jurisdiction connecting bolt packing ring.

Background

At present, the shield tunnel segment bolt gasket in China is mainly a metal gasket, and the gasket is in the form of a flat gasket, a spring gasket, a wave gasket, a tooth-shaped gasket and the like, wherein the flat gasket is the most common. The main functions of the gasket include "decompression", "friction increase", "sealing" and "fixing". In the shield tunnel, avoid the local pressure-bearing of section of jurisdiction too big through adding at bolt spiral shell head and nut department and establish the packing ring to can compress tightly the waterproof sealing washer of bolt hole department, prevent that the fit-up gap between bolt and the bolt hole from seeping water. In the process of screwing the bolt, the gasket is additionally arranged, so that the scratch of the waterproof sealing ring caused by the bolt can be reduced; compared with the method without the gasket, the waterproof sealing ring can be more uniformly pressed to a certain degree.

The washer can independently move with the bolt rubber sealing ring under the condition that the fastening degree is small, but the washer can gradually extrude the bolt rubber sealing ring along with gradual tightening of the bolt, the friction force borne by the washer is increased, the friction force can provide resistance torque to enable the resistance torque to be increased, so that the torque required to be provided by tightening the bolt is increased, and the waste of material resources and manpower is caused.

When the friction force is further increased, the gasket can drive the bolt rubber sealing ring below to generate torsional deformation, the bolt rubber sealing ring after the torsional deformation is unevenly stressed, the gap between the bolt end and the bolt hole is not easily and fully filled, a water seepage channel is easily formed, and the waterproof performance of the shield tunnel is not facilitated. For the washer with the patterns, under the condition that the fastening degree is the same, the friction force between the washer and the bolt rubber sealing ring is larger, and the sealing ring is more easily driven to move together.

If the position of the bolt rubber sealing ring can be ensured not to rotate in the process of screwing the bolt, the problem of torque increase caused by the rotation of the gasket can be solved; the bolt rubber sealing ring does not twist, and the pressure will be more uniform, the sealing is tight, and a good waterproof effect is obtained.

Disclosure of Invention

The utility model aims at providing an improve shield tunnel section of jurisdiction bolt hole waterproof performance's bolt packing ring just in order to solve above-mentioned problem.

In order to achieve the purpose, the disclosure provides a waterproof bolt washer for a shield tunnel segment bolt hole, which comprises an inner ring and an outer ring, wherein the outer ring is sleeved outside the inner ring, the inner ring and the outer ring can be connected in a relative rotating mode, the outer ring is in contact with a nut, and the inner ring is in contact with a sealing ring.

Optionally, the sealing ring is sleeved outside the inner ring.

Optionally, the sealing ring extends to the lower side of the inner ring.

Optionally, a plurality of balls are arranged between the inner ring and the outer ring, the plurality of balls are distributed annularly around the inner ring, and the balls are in rolling contact with both the inner ring and the outer ring.

Optionally, the opposite surfaces of the inner ring and the outer ring are provided with annular first grooves along the opposite surfaces, and two sides of the balls are respectively embedded into the first grooves of the inner ring and the outer ring.

Optionally, the bolt washer further comprises a ball cage, the ball cage for retaining the balls being provided at upper and lower portions of the balls, the balls being in rolling contact with the ball cage.

Optionally, the upper side and the lower side of the ball are both provided with a sealing cover, the inner side of the annular sealing cover is in sealing connection with the inner ring, and the outer side of the annular sealing cover is in sealing connection with the outer ring.

The beneficial effects of the utility model reside in that:

compared with the existing gasket, the waterproof gasket for the bolt hole of the shield tunnel segment converts the sliding friction between the gasket and the waterproof sealing ring into the rolling friction between the inner ring and the ball when the bolt is screwed, so that the torque provided by screwing the bolt is greatly reduced;

simultaneously, the motion mutually independent of the inner ring of bolt packing ring and outer loop can avoid bolt rubber seal to take place the wrench movement because of the drive of packing ring, and the sealing washer after the wrench movement is compressed tightly the back, forms the infiltration passageway easily, and then causes the shield tunnel along the condition that bolt and bolt hole clearance infiltration, the utility model discloses an use and to reduce bolt rubber seal's rotation by a wide margin, under the same engineering condition, use this bolt packing ring can obtain better water-proof effects.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic view of an installation structure of a bolt washer, a seal ring and a bolt according to the present invention;

fig. 2 is a cross-sectional view of a bolt washer according to the present invention;

fig. 3 is a top view of the bolt washer of the present invention;

description of the reference numerals

1-inner ring, 2-outer ring, 3-sealing cover, 4-ball, 5-ball retainer, 6-sealing ring, 7-nut.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the terms of orientation such as "upper" and "lower" are generally defined based on the orientation or positional relationship shown in the drawings, and specifically refer to the direction of the drawing shown in fig. 1 in combination with the positional relationship of the corresponding parts in other drawings. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, and not necessarily for order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

As shown in fig. 1, fig. 2 and fig. 3, the utility model relates to a be used for shield tunnel segment bolt hole waterproof bolt packing ring, including inner ring 1 and outer loop 2, outer loop 2 suit is in the inner ring 1 outside, and can rotate relatively between inner ring 1 and the outer loop 2 and be connected, and inner ring 1 is less than the setting of outer loop 2, and outer loop 2 and nut 7 contact do not contact with sealing washer 6, and inner ring 1 and sealing washer 6 contact do not contact with nut 7 contact.

During the screwing process of the bolt, the nut 7 is rotated, and the outer ring 2 rotates along with the nut due to the action of friction force. Because the inner ring 1 and the outer ring 2 can rotate relatively, the inner ring 1 and the sealing ring 6 can keep a relatively static state in the rotating process of the outer ring 2, thereby avoiding increasing the torque provided by screwing the bolt, and simultaneously avoiding the reduction of the waterproof capability of the twisted bolt rubber sealing ring 6 caused by uneven pressure.

Optionally, the sealing ring 6 is sleeved outside the inner ring 1. The probability of uneven torsional deformation of the sealing ring 6 in the bolt tightening process is greatly reduced, and meanwhile, the torque required by bolt tightening is also greatly reduced.

Optionally, the sealing ring 6 extends to the lower side of the inner ring 1. The seal ring 6 is arranged longer than the inner ring 1, which means that the seal ring 6 is attached to the inner ring 1 of the gasket, so that a water seepage path between the inner ring 1 and the screw rod is increased compared with the conventional gasket, and therefore, when the nut 7 is twisted downwards, the bolt gasket is extruded, the seal ring 6 is extruded by the bolt gasket, and the seal ring 6 longer than the inner ring 1 is extruded and deformed, so that the water seepage path between the inner ring 1 and the screw rod is blocked.

Optionally, a plurality of balls 4 are disposed between the inner ring 1 and the outer ring 2, the plurality of balls 4 are distributed annularly around the inner ring 1, and the balls 4 are in rolling contact with both the inner ring 1 and the outer ring 2.

The balls 4 are steel balls, and the arrangement of the balls 4 enables the inner ring 1 and the outer ring 2 to rotate relatively and independently.

Optionally, the opposite surfaces of the inner ring 1 and the outer ring 2 are both provided with annular first grooves along the opposite surfaces, and two sides of the balls 4 are respectively embedded in the first grooves of the inner ring 1 and the outer ring 2.

Optionally, the bolt washer further includes ball retainers 5, the ball retainers 5 for retaining the balls 4 being provided at upper and lower portions of the balls 4, the balls 4 being in rolling contact with the ball retainers 5. The ball cage 5 prevents the balls 4 from changing the interval between the balls 4 and the balls 4 during rotation.

Optionally, the upper side and the lower side of the ball 4 are provided with sealing covers 3, the inner side of each annular sealing cover 3 is connected with the inner ring 1 in a sealing manner, and the outer side of each annular sealing cover 3 is connected with the outer ring 2 in a sealing manner.

All be provided with two annular second recesses that distribute from top to bottom along the opposite face on the opposite face of inner ring 1 and outer loop 2, the inside and outside both sides of sealed lid 3 imbed the second recess setting of inner ring 1 and outer loop 2 respectively, prevent that ball 4 from taking place to corrode or the card income debris to ball 4 rotates unsmoothly when can effectively avoiding changing waterproof sealing ring 6 during the tunnel operation.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A bolt packing ring for shield tunnel segment bolt hole is waterproof, its characterized in that: the sealing ring comprises an inner ring and an outer ring, wherein the outer ring is sleeved on the outer side of the inner ring, the inner ring and the outer ring can be connected in a relative rotating mode, the outer ring is in contact with a screw cap, and the inner ring is in contact with a sealing ring.

2. The bolt washer for shield tunnel segment bolt hole waterproofing according to claim 1, wherein: the sealing ring is sleeved outside the inner ring.

3. The bolt washer for shield tunnel segment bolt hole waterproofing according to claim 2, wherein: the sealing ring extends to the lower side of the inner ring.

4. The bolt washer for shield tunnel segment bolt hole waterproofing according to claim 1, wherein: a plurality of balls are arranged between the inner ring and the outer ring, the balls are distributed annularly around the inner ring, and the balls are in rolling contact with the inner ring and the outer ring.

5. The bolt washer for shield tunnel segment bolt hole waterproofing according to claim 4, wherein: the opposite surfaces of the inner ring and the outer ring are provided with annular first grooves along the opposite surfaces, and the two sides of the ball are respectively embedded into the first grooves of the inner ring and the outer ring.

6. The bolt washer for shield tunnel segment bolt hole waterproofing according to claim 4, wherein: the bolt washer further includes ball retainers for retaining the balls, which are respectively provided at upper and lower portions of the balls, and the balls are in rolling contact with the ball retainers.

7. The bolt washer for shield tunnel segment bolt hole waterproofing according to claim 4, wherein: the upside and the downside of ball all are provided with sealed lid, and the inboard and the inner ring sealing connection of annular sealed lid, the outside and the outer ring sealing connection of annular sealed lid.