Arc-shaped duct piece bolt

Abstract

The utility model discloses an arc-shaped duct piece bolt, which belongs to the technical field of shield construction and comprises miniature openings oppositely arranged on two sides of a bolt end along the extending direction of threads. A connector groove is formed in the end, away from the arc-shaped bolt column, of the bolt end, and the connector groove is provided with an assembly matched with the connector groove. According to the utility model, the combined piece is knocked into the open slot, so that the micro opening prearranged at the end of the bolt can be opened, and radial acting force is provided for the nut, thereby achieving the effect of preventing the nut from loosening and sliding.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the shield construction technical field, concretely relates to an arc segment bolt. BACKGROUND

[0002] The bolt of the segment joint is the key structure for connecting the subway segment, and plays a vital role in the safe operation of the subway pipeline. The bolt of the segment joint is in a complex stress state and bears a huge stress. At present, in the installation of the traditional bolt of the arc segment joint, the gasket and the nut are sequentially threaded through the threaded end of the bolt end, and the nut is tightened to lock the segment. However, under the action of the long-term vibration load of the subway pipeline, the nut has the risk of thread stripping and falling, which causes great harm to the operation of the subway pipeline.

[0003] To solve this problem, there is an urgent need for a segment bolt structure that can prevent the nut from thread stripping and falling and is easy to install. UTILITY MODEL CONTENTS

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] An arc segment bolt, comprising an arc bolt column, both ends of the arc bolt column are provided with bolt end heads with threads, and the bolt end heads are sequentially provided with gaskets and nuts from inside to outside; wherein the nut is provided with an internal thread matched with the thread of the bolt end head, and both sides of the bolt end head are oppositely provided with micro openings along the extension direction of the thread; one end of the bolt end head away from the arc bolt column is provided with a joint slot, and the joint slot is provided with a combined part matched with the joint slot.

[0006] Further, the combined part comprises a circular truncated cone steel block and an arc segment wedge block matched with the joint slot; the arc segment wedge block is inserted into the joint slot, and one end of the arc segment wedge block away from the joint slot is provided with a groove matched with the circular truncated cone steel block; the circular truncated cone steel block is inserted into the groove.

[0007] Further, the joint slot is arranged at the central part of the bolt end head, the joint slot is a circular truncated cone slot, and the joint slot is gradually tapered inward from the end surface.

[0008] Further, the arc segment wedge block is composed of three small plate pieces with consistent size and taper, and the taper and the arc of the arc segment wedge block are consistent with the joint slot.

[0009] Further, the upper base surface diameter of the circular truncated cone steel block is smaller than the cylindrical inner cavity, and the lower base surface diameter is larger than the cylindrical inner cavity.

[0010] Further, the arc bolt column is sequentially provided with a bolt column body, a galvanized protective layer and a basalt fiber layer from inside to outside.

[0011] Further, the outer surface of the bolt head is provided with a zinc plating layer.

[0012] The utility model discloses beneficial effect:

[0013] 1, the joint slot is set to the center part of bolt head, and the combined component that is composed of arc segment wedge block and round table type steel block is knocked into the joint slot, can open the miniature opening that is preset at the bolt head, provides radial force for the nut, thereby reaches the effect that prevents the nut from slipping off.

[0014] 2, the arc bolt column adds a basalt fiber layer on the basis of the original zinc plating protective layer. The basalt fiber protective layer can protect the segment joint bolt from being abraded during transportation and installation due to its excellent wear resistance. Meanwhile, the fiber protective layer has the characteristics of light weight and high tensile strength, and can make the segment joint bolt have more superior mechanical properties without significantly increasing the original mass of the segment joint bolt. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an arc-shaped segment bolt.

[0016] Figure 2 It is an enlarged view of the bolt head.

[0017] Figure 3 It is a sectional view of the joint slot.

[0018] Figure 4 It is a sectional view of the arc-shaped bolt column.

[0019] Reference signs in the drawings are as follows: 1, arc-shaped bolt column; 11, bolt column body; 12, zinc plating protective layer; 13, basalt fiber layer; 2, bolt head; 3, gasket; 4, nut; 5, arc segment wedge block; 6, round table type steel block; 7, miniature opening; 8, joint slot. DETAILED DESCRIPTION

[0020] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0021] Embodiment 1

[0022] Reference Figures 1-4The utility model provides an arc pipe piece bolt, including arc bolt column 1, the both ends of arc bolt column 1 are provided with bolt end 2 with thread, and bolt end 2 is sequentially provided with gasket 3 and nut 4 from inside to outside, wherein, nut 4 is provided with the internal thread matched with the thread of bolt end 2, and the both sides of bolt end 2 are oppositely provided with micro opening 7 along the extension direction of thread, and the end of bolt end 2 away from arc bolt column 1 is provided with joint slot 8, and joint slot 8 is provided with the combination matched with joint slot 8.

[0023] Preferably, the combination comprises a circular truncated cone steel block 6 and an arc segment wedge block 5 matched with the joint slot 8, the arc segment wedge block 5 is inserted into the joint slot 8, and the end of the arc segment wedge block 5 away from the joint slot 8 is provided with a groove matched with the circular truncated cone steel block 6, and the circular truncated cone steel block 6 is inserted into the groove.

[0024] Preferably, the joint slot 8 is provided at the central part of the bolt end 2, the joint slot 8 is a circular truncated cone slot, and the joint slot 8 is gradually tapered inward from the end surface.

[0025] Preferably, the arc segment wedge block 5 is composed of three small plates with uniform size and taper, and the taper and arc of the arc segment wedge block 5 are consistent with the joint slot 8.

[0026] Preferably, the upper base diameter of the circular truncated cone steel block 6 is smaller than the cylindrical inner cavity, and the lower base diameter is larger than the cylindrical inner cavity.

[0027] Preferably, the arc bolt column 1 is sequentially provided with a bolt column body 11, a galvanized protective layer 12 and a basalt fiber layer 13 from inside to outside.

[0028] Preferably, the outer surface of the bolt end 2 is provided with a galvanized layer.

[0029] Working principle: the arc pipe piece joint bolt is inserted from the pipe piece hand hole, the gasket 3 and the nut 4 are inserted into the threaded bolt end 2, the nut 4 is tightened until the two pipes are fastened, the arc segment wedge block 5 composed of three small plates with uniform size and taper is inserted into the joint slot 8, because the arc and taper of the two are the same, the space in the slot of the joint slot 8 can be filled into a cylindrical inner cavity, the circular truncated cone steel block 6 is knocked into the cylindrical inner cavity, and the circular truncated cone steel block 6 will expand the inner cavity in the process of continuously knocking into the inner cavity, gradually opening the micro opening 7 preset at the bolt end 2, and preventing the nut 4 from being caused to retreat due to vibration load and other factors in the long-term service process of the pipeline.

[0030] The above only describes the preferred embodiments of the utility model and is not used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model are included in the protection scope of the utility model.

Claims

1. An arc-shaped segment bolt, comprising an arc-shaped bolt column, both ends of the arc-shaped bolt column are provided with bolt heads with threads, the bolt heads are sequentially provided with a gasket and a nut from inside to outside; wherein, The nut is provided with internal threads matching the threads of the bolt head, characterized in that the bolt head is provided with micro openings on both sides in the extension direction of the threads; the bolt head is provided with a joint slot at the end away from the arc-shaped bolt column, and the joint slot is provided with a combination part matching the joint slot.

2. An arcuately shaped tubular segment bolt according to claim 1, wherein, The combination part comprises a round-taip steel block and an arc segment wedge block matching the joint slot; the arc segment wedge block is inserted into the joint slot, and the arc segment wedge block is provided with a groove at the end away from the joint slot, which matches the round-taip steel block; the round-taip steel block is inserted into the groove.

3. An arcuately shaped tubular segment bolt according to claim 2, wherein, The joint slot is arranged at the central part of the bolt head, and the joint slot is a round-taip slot, which is tapered inward from the surface of the head.

4. An arcuately shaped tubular segment bolt according to claim 3, wherein, The arc segment wedge block is composed of three small plates with consistent size and taper, and the taper and arc of the arc segment wedge block are consistent with the joint slot.

5. An arcuately shaped tubular segment bolt according to claim 4, wherein, The upper bottom surface diameter of the round-taip steel block is smaller than the cylindrical inner cavity, and the lower bottom surface diameter is larger than the cylindrical inner cavity.

6. The arcuately-tubular sheet bolt of claim 1, wherein, The arc-shaped bolt column is sequentially provided with a bolt column body, a galvanized protective layer and a basalt fiber layer from inside to outside.

7. The arcuately-tubular sheet bolt of claim 1, wherein, The outer surface of the bolt head is provided with a galvanized layer.

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