Anti-falling device suitable for shield tunnel segment bolt and nut

Abstract

The utility model discloses an anti-falling device suitable for shield tunnel segment bolts and nuts. Relates to the technical field of tunnel construction, in particular to a segment bolt gasket fixing piece which comprises a fixing piece, a segment bolt gasket, a segment bolt and a segment nut, and a segment bolt and a segment nut, and is characterized in that the fixing piece is arranged on the segment bolt gasket through a fixing bolt; the rotating assembly comprises a rotating piece and a pawl, the rotating piece is nested on the segment bolt nut, the pawl is arranged at the end, away from the segment bolt nut, of the rotating piece, the pawl is rotatably arranged on the rotating piece, and the end, away from the rotating piece, of the pawl makes contact with the inner side of the fixing piece. The pipe piece bolt nut has the advantages of being simple in structure, convenient and fast to install and suitable for a built shield tunnel, the pipe piece bolt nut can be effectively prevented from loosening or falling off in the operation process, and the safety and stability of the shield tunnel are improved.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and more specifically to an anti-loosening device for bolts and nuts of shield tunnel segments. Background Technology

[0002] During the operation of shield tunnels, the nuts of the segment bolts may loosen or fall off due to external disturbance loads such as train travel, which poses a serious threat to the structural safety and normal use of the tunnel.

[0003] To address this issue, invention patent CN119021949A discloses a bolt and nut anti-loosening device and method for shield tunnel segments. This device effectively prevents bolts and nuts from loosening and falling off through a pin-like mechanism. However, this anti-loosening method requires modification to the structure of the bolt holes in the tunnel segments, making it unsuitable for use in existing shield tunnels and unable to achieve effective anti-loosening and anti-fall-off effects.

[0004] Therefore, how to provide a non-destructive anti-loosening device for segment bolts and nuts without interfering with the normal tightening and use of the bolts and nuts is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides an anti-loosening device for bolts and nuts of shield tunnel segments, which can perform anti-loosening treatment on bolts and nuts of segments without damage, and will not interfere with the normal tightening and use of bolts and nuts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for preventing the loosening of bolts and nuts for tunnel segments in shield tunnels, comprising:

[0008] A fixing plate is provided on a segment bolt washer by a fixing bolt, and a segment bolt nut is provided on the fixing plate;

[0009] A rotating assembly includes a rotating plate and a pawl. The rotating plate is nested on the segment bolt nut, and the pawl is disposed on the end of the rotating plate away from the segment bolt nut. The pawl is rotatably disposed on the rotating plate, and the end of the pawl away from the rotating plate contacts the inner side of the fixed plate.

[0010] Furthermore, it also includes an elastic support, one end of which is disposed on the fixed plate, and the other end of which contacts the pawl.

[0011] Furthermore, the inner side of the fixing plate is provided with reverse teeth, which are adapted to the ratchet.

[0012] Furthermore, the pawl is fixed to the rotating plate by screws or pins, and the pawl can rotate around the fixed point on the rotating plate.

[0013] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a device for preventing the loosening of bolts and nuts of shield tunnel segments. It has the advantages of simple structure, convenient installation and applicability to existing shield tunnels. It can effectively prevent the bolts and nuts of segments from loosening or falling off during operation, thereby improving the safety and stability of shield tunnels. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 A schematic diagram of the structure of the anti-loosening device for bolts and nuts of shield tunnel segments provided by this utility model;

[0016] Figure 2 A side view of the anti-loosening device for bolts and nuts of shield tunnel segments provided by this utility model.

[0017] The components include: 1. Fixed plate; 2. Rotating plate; 3. Pawl; 4. Elastic support; 5. Fixed bolt; 6. Segment bolt nut; 7. Segment bolt washer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] See Figure 1-2 This utility model discloses an anti-loosening device for bolts and nuts of shield tunnel segments, comprising:

[0020] The fixing plate 1 is mounted on the segment bolt washer 7 by fixing bolt 5, and the fixing plate 1 is provided with segment bolt nut 6; the fixing plate 1 is detachably mounted on the segment bolt washer 7 by fixing bolt 5, which can effectively fix the fixing plate 1 and prevent the segment bolt nut 6 from loosening due to external disturbance;

[0021] The rotating assembly includes a rotating plate 2 and a pawl 3. The rotating plate 2 is nested on the segment bolt nut 6, and the pawl 3 is located on the end of the rotating plate 2 away from the segment bolt nut 6. The pawl 3 is rotatably mounted on the rotating plate 2, and the end of the pawl 3 away from the rotating plate 2 contacts the inner side of the fixing plate 1. When the segment bolt nut 6 becomes loose or falls off, the fixing plate 1, in conjunction with the pawl 3, can prevent the segment bolt nut 6 from continuing to rotate in the reverse direction, thus preventing it from falling off further and effectively ensuring the structural safety of the tunnel.

[0022] In this embodiment, an elastic support 4 is also included. One end of the elastic support 4 is disposed on the fixed plate 1, and the other end of the elastic support 4 is in contact with the pawl 3. The elastic support 4 is made of corrosion-resistant thin metal sheet such as titanium alloy or copper alloy sheet, which has excellent elastic support performance. The elastic support 4 can play a supporting role when the pawl 3 rotates in the reverse direction, but does not have any effect when the pawl 3 rotates in the forward direction, thereby effectively preventing further loosening of the bolt and nut.

[0023] In this embodiment, the inner side of the fixing plate 1 is provided with reverse teeth, which are adapted to the pawl 3 to limit the pawl 3 on the pipe segment bolt nut 6.

[0024] In this embodiment, the pawl 3 is fixed to the rotating plate 2 by screws or pins, and the pawl 3 can rotate around the fixed point on the rotating plate 2.

[0025] Detailed installation process

[0026] First, place the fixing plate 1 on the pipe segment bolt washer 7, and then fix the fixing plate 1 with the fixing bolt 5;

[0027] Then, the rotating plate 2 is nested on the segment bolt nut 6, and the pawl 3 and elastic support 4 are installed. Through the loosening prevention device of the segment bolt nut 6, it is ensured that the segment bolt nut 6 will no longer loosen and fall off.

[0028] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fall-preventing device for shield tunnel segment bolt nuts (6), characterized in that, It comprises: a fixed piece (1) which is arranged on a pipe piece bolt gasket (7) through a fixed bolt (5), and a pipe piece bolt nut (6) is arranged on the fixed piece (1); a rotating assembly which comprises a rotating piece (2) and a pawl (3), the rotating piece (2) is nested on the pipe piece bolt nut (6), the pawl (3) is arranged on the end of the rotating piece (2) which is away from the pipe piece bolt nut (6), the pawl (3) is rotatably arranged on the rotating piece (2), and the end of the pawl (3) which is away from the rotating piece (2) is in contact with the inner side of the fixed piece (1).

2. A device for preventing the falling of bolts and nuts (6) for segments of a shield tunnel according to claim 1, characterized in that, It also comprises an elastic support (4), one end of the elastic support (4) is arranged on the fixed piece (1), and the other end of the elastic support (4) is in contact with the pawl (3).

3. A device for preventing the falling of bolts and nuts (6) for segments of a shield tunnel according to claim 1, characterized in that, The inner side of the fixed piece (1) is provided with reverse teeth which are matched with the pawl (3).

4. A device for preventing the falling of bolts and nuts (6) for segments of a shield tunnel according to claim 1, characterized in that, The pawl (3) is fixed on the rotating piece (2) through a screw or a bolt, and the pawl (3) can rotate around the fixed point on the rotating piece (2).

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