Protective cap for duct piece connecting bolt of rail transit tunnel

Abstract

The utility model discloses a protective cap for a duct piece connecting bolt of a rail transit tunnel. The protective cap comprises a bolt connecting part, a nut buckling part and a gasket buckling part which are integrally formed, the lower end of the bolt connecting part is opened to form an assembling cavity, internal threads are arranged on the inner wall, opposite to the assembling cavity, of the bolt connecting part, and the threaded end of the bolt is in threaded connection with the internal threads; the upper end and the lower end of the nut buckling part are communicated to form a containing cavity which is matched with the nut end of the bolt. The upper end face of the nut buckling part is fixed to the lower end face of the bolt connecting part. The upper end and the lower end of the gasket buckling part are communicated to form a buckling cavity which is matched with a gasket of the bolt. The upper end face of the gasket buckling part is fixed to the lower end face of the nut buckling part. The gasket, the nut end and the threaded end of the bolt can be protected through the gasket buckling part, the nut buckling part and the bolt connecting part, the bolt cannot be polluted by follow-up tunnel construction, later construction and maintenance work of a tunnel are facilitated, turnover is facilitated through the detachable connecting mode, and the resource utilization rate is increased; the utility model has the advantages of simple structure and low manufacturing cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the tunnel construction technology field of rail transit, more specifically relates to a protective cap for rail transit tunnel segment connecting bolt. BACKGROUND

[0002] In the process of tunneling of rail transit, the installation of tunnel segment is needed, and the conventional technical means is to set bolt holes at the joint plate and main beam part of the tunnel segment, and then bolts are penetrated for connection. The bolt connection has the characteristics of simple segment production and convenient construction operation.

[0003] However, in the process of concrete spraying construction of the inner wall of the tunnel in the later period, due to improper protection of the segment bolt, concrete can enter the gap between the segment and the bolt, causing great cleaning difficulty to the later construction.

[0004] Therefore, how to provide a protection device for tunnel segment connection, which will not affect the bolt due to subsequent construction after the installation of the tunnel segment, and facilitate the construction and maintenance operation of the tunnel in the later period, is a problem that the person skilled in the art needs to solve. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a protective cap for rail transit tunnel segment connecting bolt, aiming at solving the above technical problems.

[0006] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0007] A protective cap for rail transit tunnel segment connecting bolt, comprising an integrally formed bolt connecting part, a nut clamping part and a gasket clamping part;

[0008] The lower end of the bolt connecting part is open to form an assembly cavity, and the bolt connecting part is provided with an internal thread relative to the inner wall of the assembly cavity, and the threaded end of the bolt is threadedly connected with the internal thread;

[0009] The upper and lower ends of the nut clamping part are through to form a containing cavity, and the containing cavity is adapted to the nut end of the bolt; the upper end face of the nut clamping part is fixed with the lower end face of the bolt connecting part;

[0010] The upper and lower ends of the gasket clamping part are through to form a clamping cavity, and the clamping cavity is adapted to the gasket of the bolt; the upper end face of the gasket clamping part is fixed with the lower end face of the nut clamping part.

[0011] The gasket of the gasket fastening part, the nut end of the bolt of the nut fastening part, and the bolt connecting part are threadedly connected through the inner thread of the bolt connecting part and the thread end of the bolt, the rail transit tunnel segment connecting bolt is fully fastened, the rail transit tunnel segment connecting bolt can be effectively protected, the connecting bolt is prevented from being polluted by subsequent construction, and the construction and maintenance of the tunnel in the later period are facilitated, and the detachable connection mode can realize reuse of the protective cap and reduce resource consumption.

[0012] Based on the technical scheme, the utility model further can make improvement as follows.

[0013] Further, the outer wall of the nut fastening part is fixed with a plurality of stiffening ribs, and the length direction of the plurality of stiffening ribs is parallel to the axial direction of the nut fastening part.

[0014] Further, the bolt connecting part, the nut fastening part and the gasket fastening part are cylindrical, the inner diameter of the bolt connecting part is smaller than the inner diameter of the nut fastening part, and the inner diameter of the gasket fastening part is greater than the inner diameter of the nut fastening part.

[0015] Further, one end of the plurality of stiffening ribs is fixed to the upper end face of the gasket fastening part opposite to the nut fastening part in the circumferential direction.

[0016] Further, the protective cap further comprises a brim fixed to the lower end face of the gasket fastening part, and the inner diameter of the brim is greater than the inner diameter of the gasket fastening part.

[0017] Further, the outer periphery of the protective cap is coated with epoxy resin.

[0018] Further, the outer periphery of the protective cap is coated with a ceramic heat-insulating coating.

[0019] Further, the wall thickness of the protective cap is not less than 3 mm.

[0020] Compared with the prior art, the utility model discloses a protective cap for a rail transit tunnel segment connecting bolt, the gasket, the nut end and the thread end of the bolt can be protected through the gasket fastening part, the nut fastening part and the bolt connecting part, the bolt is not polluted by subsequent tunnel construction, the construction and maintenance of the tunnel in the later period are facilitated, the detachable connection mode is convenient for turnover and improves the resource utilization rate, and the utility model has the advantages of simple structure and low manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings described below are only part of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0022] Fig. 1 The protective cap structure schematic view provided by the present application is shown in the figure.

[0023] Fig. 2 The protective cap sectional view provided by the present application is shown in the figure.

[0024] Among them,

[0025] 1-bolt connection part; 11-assembly cavity;

[0026] 2-nut clamping part; 21-accommodation cavity;

[0027] 3-gasket clamping part; 31-clamping cavity;

[0028] 4-internal thread;

[0029] 5-stiffening rib;

[0030] 6-brim. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Referring to the drawings, Figs. 1-2 The embodiment of the present application discloses a protective cap for rail transit tunnel segment connecting bolt, which comprises an integrally formed bolt connection part 1, a nut clamping part 2 and a gasket clamping part 3.

[0033] The lower end of the bolt connection part 1 is open to form an assembly cavity 11, and the bolt connection part 1 is provided with an internal thread 4 relative to the inner wall of the assembly cavity 11, and the threaded end of the bolt is threadedly connected with the internal thread 4.

[0034] The upper and lower ends of the nut clamping part 2 are through to form an accommodation cavity 21, and the accommodation cavity 21 is adapted to the nut end of the bolt; the upper end surface of the nut clamping part 2 is fixed with the lower end surface of the bolt connection part 1.

[0035] The gasket fastening part 3 is provided with a fastening cavity 31 penetrating through the upper and lower ends of the gasket fastening part 3, which is adapted to the gasket of the bolt; and the upper end surface of the gasket fastening part 3 is fixed to the lower end surface of the nut fastening part 2.

[0036] In the embodiment, the bolt connecting part is threadedly connected with the bolt, the nut fastening part is fastened to the nut end of the bolt, and the gasket fastening part is fastened to the gasket of the bolt, so that the bolt can be protected in all directions to prevent the bolt from being polluted by the concrete.

[0037] In some other embodiments, the nut fastening part can be used as an extension of the protective cap to increase the height of the protective cap, the gasket fastening part is used to fasten the nut end and the gasket of the bolt, and the bolt connecting part is used to threadedly connect with the bolt, so that the protective cap can be used for bolts of different lengths and different specifications.

[0038] In order to further optimize the above technical solution and improve the rigidity of the protective cap, the outer wall of the nut fastening part 2 is fixed with a plurality of stiffening ribs 5, and the length direction of the plurality of stiffening ribs 5 is parallel to the axial direction of the nut fastening part 2.

[0039] In the embodiment, the bolt connecting part 1, the nut fastening part 2 and the gasket fastening part 3 are all cylindrical; the inner diameter of the bolt connecting part 1 is smaller than the inner diameter of the nut fastening part 2; and the inner diameter of the gasket fastening part 3 is larger than the inner diameter of the nut fastening part 2. The protective cap is designed to change the diameter to adapt to the shape of the bolt, thereby reducing the manufacturing cost of the protective cap.

[0040] In order to further optimize the above technical solution and ensure the overall consistency of the protective cap, one end of the plurality of stiffening ribs 5 is fixed to the upper end surface of the gasket fastening part 3 opposite to the nut fastening part 2.

[0041] In order to further optimize the above technical solution, the protective cap further comprises a brim 6 fixed to the lower end surface of the gasket fastening part 3, and the inner diameter of the brim 6 is larger than the inner diameter of the gasket fastening part 3.

[0042] The brim can ensure that the protective cap is completely fastened to the bolt, and the brim can be completely removed from the inner wall of the tunnel to prevent dust from entering the protective cap.

[0043] In order to further optimize the above technical solution and improve the corrosion resistance of the protective cap, the outer periphery of the protective cap is coated with an epoxy resin.

[0044] In order to further optimize the above technical solution and improve the heat preservation and insulation performance of the protective cap, the outer periphery of the protective cap is coated with a ceramic heat insulation coating.

[0045] In order to further optimize the above technical solution and improve the service life of the protective cap, the wall thickness of the protective cap is not less than 3 mm.

[0046] In some other embodiments, the inner wall of the nut fastening part is fixed with a plurality of reinforcing ribs, the reinforcing ribs are provided with a plurality of reinforcing rib strips, the reinforcing rib strips are uniformly distributed along the inner wall of the nut fastening part, and the reinforcing ribs abut against the outer wall of the nut end of the bolt after the protective cap is fastened to the bolt, so as to achieve the clamping of the nut of the bolt.

[0047] In some other embodiments, the inner thread of the bolt fastening part can be cancelled, the inner wall of the nut fastening part is processed into a shape suitable for the nut end of the bolt, which is usually a hexagonal prism surface, and the nut fastening part can be directly fastened to the nut end of the bolt.

[0048] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0049] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protective cap for a rail transit tunnel segment connecting bolt, characterized in that, The bolt connecting part (1), the nut clamping part (2) and the gasket clamping part (3) are integrally formed; The lower end of the bolt connecting part (1) is open to form an assembly cavity (11), and the bolt connecting part (1) is provided with an internal thread (4) relative to the inner wall of the assembly cavity (11), and the threaded end of the pipe piece connecting bolt is threadedly connected with the internal thread (4); The upper and lower ends of the nut clamping part (2) are through to form a containing cavity (21), and the containing cavity (21) is adapted to the nut end of the bolt; the upper end face of the nut clamping part (2) is fixed with the lower end face of the bolt connecting part (1); The upper and lower ends of the gasket clamping part (3) are through to form a clamping cavity (31), and the clamping cavity (31) is adapted to the gasket of the bolt; the upper end face of the gasket clamping part (3) is fixed with the lower end face of the nut clamping part (2).

2. The protective cap for rail transit tunnel segment connecting bolts according to claim 1, characterized in that, The outer wall of the nut clamping part (2) is fixed with a plurality of stiffening ribs (5), and the length direction of the plurality of stiffening ribs (5) is parallel to the axial direction of the nut clamping part (2).

3. The protective cap for rail transit tunnel segment connecting bolt according to claim 2, characterized in that, The bolt connecting part (1), the nut clamping part (2) and the gasket clamping part (3) are cylindrical; the inner diameter of the bolt connecting part (1) is smaller than the inner diameter of the nut clamping part (2); the inner diameter of the gasket clamping part (3) is greater than the inner diameter of the nut clamping part (2).

4. The protective cap for rail transit tunnel segment connecting bolt according to claim 3, characterized in that, One end of the plurality of stiffening ribs (5) is fixed with the upper end face of the gasket clamping part (3) relative to the circumferential direction of the nut clamping part (2).

5. The protective cap for rail transit tunnel segment connecting bolt according to claim 3, characterized in that, Further comprising a hat brim (6) which is fixed on the lower end face of the gasket clamping part (3), and the inner diameter of the hat brim (6) is greater than the inner diameter of the gasket clamping part (3).

6. A protective cap for a rail transit tunnel segment connecting bolt according to any one of claims 1 to 5, characterized in that, The outer periphery of the protective cap is coated with epoxy resin.

7. A protective cap for a rail transit tunnel segment connecting bolt according to any one of claims 1 to 5, characterized in that, The outer periphery of the protective cap is coated with a ceramic thermal insulation coating.

8. A protective cap for a rail transit tunnel segment connecting bolt according to any one of claims 1 to 5, characterized in that, The wall thickness of the protective cap is not less than 3mm.

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