CN219529540U - Permanent protection cover for shield segment bolt end - Google Patents

Abstract

A permanent protective cover for a bolt end of a shield segment, comprising: the fixing seat and the outer protective cover; the fixing seat is a hollow annular body with two open ends, and the annular body is provided with an inner layer and an outer layer; the height of the inner annular body is smaller than that of the outer annular body; the outer annular body wraps the large-diameter periphery of the bolt end; the inner annular body wraps the outer periphery of the outermost small diameter of the bolt end; two ends of the outer side wall of the outer layer annular body are respectively provided with a clamping mechanism in a protruding way; the outer protective cover is a cover body with an opening at one end, and the opening end of the outer protective cover is in a two-stage step shape and is matched with the bottom of the periphery of the end head of the bolt; two ends of the inner side wall of the outer protective cover are respectively provided with a protruding structure which is buckled and fixedly connected with the clamping mechanism. The utility model is a permanent protective cover for the end head of the bolt at the joint of the shield segment, ensures that the end head of the bolt is completely surrounded, solves the problem of corrosion and rust of the bolt due to moist environment, and has simple and quick assembly mode, low cost, no need of using screw turners and simple assembly process.

Description

A permanent protective cover for the bolt end of a shield segment

technical field

The utility model belongs to the technical field of bolt protection covers, in particular to a permanent protection cover for the bolt ends of shield segments.

Background technique

The shield segment is the main assembly component of shield construction and the innermost barrier of the tunnel, which bears the role of resisting soil pressure, groundwater pressure and some special loads. The shield segment is the permanent lining structure of the shield tunnel. The quality of the shield segment is directly related to the overall quality and safety of the tunnel, and affects the waterproof performance and durability of the tunnel.

The bolt at the joint of the shield segment refers to a connecting piece used by the shield machine to connect and fasten adjacent segments during the excavation of the underground space. The peripheral bottom of the connecting bolt end is in the shape of two steps, and its head generally includes two protrusions with different diameters. Through the connection of the bolts at the joints of the segments, several arched segments can be connected into a A circle, thus supporting the entire surface of the tunnel. Since the pipeline bolts are used underground and the environment is humid, it is easy to cause corrosion and rust of the bolts at the joints of the segments. When corrosion enters the inside of the bolt, it will affect the mechanical properties and tensile strength of the bolt, so the surface treatment of the bolt is very important.

The connecting bolts of different shield segments have various designs. A permanent protective cover is proposed for the bolts at the joints of shield segments to solve the problem of corrosion and rust of the bolts due to the humid environment.

Utility model content

The technical problem to be solved by the utility model is to provide a permanent protective cover for the bolt ends of the shield segment, which can completely cover the bolts at the joints of the segments, and prevent the bolts from corroding and rusting due to the damp underground environment.

The utility model is achieved in that:

A permanent protective cover for the bolt end of a shield segment, comprising: a fixing seat and an outer protective cover;

The fixing seat is a hollow annular body with two ends open, and the annular body has two inner and outer layers; the height of the inner layer annular body is smaller than the height of the outer layer annular body; the outer layer The annular body wraps the periphery of the large diameter of the bolt end; the inner layer annular body wraps the outermost small diameter periphery of the bolt end; the inner wall of the inner layer annular body is provided with a plurality of first ribs and the bolt end The small-diameter peripheral side walls are in contact with each other; the two ends of the outer wall of the outer annular body are respectively protruded and provided with a locking mechanism;

The outer protective cover is a cover body with one end open, and its open end is in the shape of two steps, matching with the outer bottom of the bolt end; The locking mechanism of the fixing seat is fastened and fixedly connected.

Further, the locking mechanism includes a first trapezoidal protrusion and a second trapezoidal protrusion arranged at intervals up and down; the slopes of the first trapezoidal protrusion and the second trapezoidal protrusion are located on the upper surface; The outwardly extending length of the first trapezoidal protrusion is less than the outwardly extending length of the second trapezoidal protrusion;

The protruding structure of the outer protective cover is trapezoidal, and its slope is located on the lower surface;

When the protruding structure is pressed down, its lower surface matches the upper surface of the first trapezoidal bump, and when the pressing continues, the protruding structure snaps into the first trapezoidal bump and the second trapezoidal bump locked between.

Further, the inner and outer rings are connected by a plurality of second ribs.

Further, the cross section of the outer shield is hexagonal.

Further, the outer protective cover is made of plastic.

The utility model has the advantages that: the utility model is used for the permanent protective cover of the bolt end at the joint of the shield segment, which ensures that the bolt end is completely surrounded, and solves the problem of the bolt being corroded and rusted due to the humid environment, and The buckle-type protective cover is assembled in a simple, fast, and low-cost manner, without using a screwdriver, and the assembly process is simple.

Description of drawings

The utility model will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

Fig. 1 is a sectional view of the utility model in use.

Fig. 2 is the front view of the fixing seat in the utility model.

Fig. 3 is a top view of the fixing seat in the utility model.

Fig. 4 is a schematic diagram of the three-dimensional structure of the fixing seat in the utility model.

Fig. 5 is a three-dimensional schematic diagram of the outer protective cover in the present invention.

Fig. 6 is a longitudinal sectional view of the outer protective cover in the utility model.

Detailed ways

Please refer to Figures 1 to 6, a permanent protective cover for the bolt end of a shield segment, including: a fixing seat 1 and an outer protective cover 2;

The fixing seat 1 is a hollow annular body with openings at both ends, and the annular body has two layers inside and outside; the height of the inner layer annular body 11 is smaller than the height of the outer layer annular body 12; the outer layer annular body 12 wraps The periphery of the large diameter of the bolt end 100; the inner annular body 11 wraps the periphery of the outermost small diameter of the bolt end 100; the inner wall of the inner annular body 11 is provided with a plurality of first ribs 111 and the small diameter of the bolt end 100 The peripheral side walls are in contact with each other; the two ends of the outer wall of the outer annular body 12 are protrudingly provided with a locking mechanism 13 . The inner ring body 11 and the outer ring body 12 are connected by a plurality of second ribs 121 .

The outer protective cover 2 is a cover body with an opening at one end, and its opening end is in the shape of two steps, matching with the outer bottom of the bolt head 100; The locking mechanism 13 of the fixed seat 1 is locked and fixedly connected.

The locking mechanism 13 includes a first trapezoidal projection 131 and a second trapezoidal projection 132 arranged at intervals up and down; the slopes of the first trapezoidal projection 131 and the second trapezoidal projection 132 are located on the upper surface; The outwardly extending length of the first trapezoidal protrusion 131 is less than the outwardly extending length of the second trapezoidal protrusion 132 .

The protruding structure 21 of the outer protective cover 2 is trapezoidal, and its slope is located on the lower surface;

When the protruding structure 21 of the outer protective cover 2 is engaged with the snap-in mechanism 13, when the protruding structure 21 is pressed down, its lower surface matches the upper surface of the first trapezoidal bump 131, and the protruding structure 21 is locked by continuing to press down. Lock between the first trapezoidal protrusion 131 and the second trapezoidal protrusion 132 .

In this embodiment, the cross section of the outer protective cover 2 is hexagonal, and may also be circular or other shapes in practice. Outer protective cover 2 is made of plastics.

The utility model is used for the permanent protective cover of the bolt end at the seam of the shield segment, which ensures that the bolt end is completely surrounded and solves the problem of the bolt being corroded and rusted due to the humid environment, and the buckle-type protective cover is assembled The method is simple, fast, and low in cost, without using a screwdriver, and the assembly process is simple.

The above-mentioned embodiments and drawings do not limit the form and style of the utility model, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the utility model.

Claims (5)

1. The utility model provides a shield constructs permanent safety cover of section of jurisdiction bolt end which characterized in that: comprising the following steps: the fixing seat and the outer protective cover;

the fixing base is a hollow annular body with two open ends, the annular body is an inner layer and an outer layer, and the fixing base comprises: an inner annular body and an outer annular body; the height of the inner annular body is smaller than that of the outer annular body; the outer annular body wraps the large-diameter periphery of the bolt end; the inner annular body wraps the outer periphery of the outermost small diameter of the bolt end; the inner side wall of the inner annular body is provided with a plurality of first ribs which are abutted against the small-diameter peripheral side wall of the bolt end; two ends of the outer side wall of the outer layer annular body are respectively provided with a clamping mechanism in a protruding mode;

the outer protective cover is a cover body with an opening at one end, and the opening end of the outer protective cover is in a two-stage step shape and is matched with the bottom of the periphery of the end head of the bolt; two opposite inner side walls of the outer protective cover are respectively provided with a protruding structure which is buckled and fixedly connected with the clamping mechanism of the fixing seat.

2. The permanent protective cover for the bolt end of the shield segment according to claim 1, wherein: the clamping mechanism comprises a first trapezoidal protruding block and a second trapezoidal protruding block which are arranged at intervals up and down; inclined surfaces of the first trapezoidal protruding block and the second trapezoidal protruding block are positioned on the upper surface; the length of the outward extension of the first trapezoid protruding block is smaller than that of the outward extension of the second trapezoid protruding block;

the protruding structure of the outer protective cover is trapezoid, and the inclined surface of the protruding structure is positioned on the lower surface;

when the protruding structure is pressed down, the lower surface of the protruding structure is matched with the upper surface of the first trapezoidal protruding block, the protruding structure is continuously pressed down, and the protruding structure is clamped between the first trapezoidal protruding block and the second trapezoidal protruding block to be locked.

3. The permanent protective cover for the bolt end of the shield segment according to claim 1, wherein: the inner layer and the outer layer of annular bodies are connected through a plurality of second ribs.

4. The permanent protective cover for the bolt end of the shield segment according to claim 1, wherein: the cross section of the outer protective cover is hexagonal.

5. The permanent protective cover for the bolt end of the shield segment according to claim 1, wherein: the outer protective cover is made of plastic.