Segment positioning pin assembly

Abstract

The utility model relates to a pipe piece positioning pin assembly, and aims to solve the problems of assembly alignment degree and connection stability of prefabricated pipe pieces in modern open caisson method construction. The assembly is composed of an internal shear-resistant pin and an external pin bush, the internal shear-resistant pin is made of a 65Mn material, and the hardness and the corrosion resistance are improved through heat treatment and surface oxidation treatment. The external pin bush is made of a synthetic rubber material added with carbon black, is of an olive-shaped structure, has high bearing capacity, wear resistance and flexing resistance, and is easy to align and put into a duct piece taper hole. The positioning pin assembly combines the advantages of metal and rubber, not only is light in weight and low in cost, but also ensures the accuracy and the stability of segment assembly, and remarkably improves the quality and the safety of vertical shaft construction.

Description

Technical Field

[0001] The utility model relates to the field of vertical shaft drilling construction, in particular to a pipe segment positioning pin assembly. Background Art

[0002] In modern caisson construction, shafts formed by assembling prefabricated segments are being used more and more widely, and the quality of the segment assembly is directly related to the service life and safety of the shaft.

[0003] Currently, the alignment of the pipe segments is a key factor affecting the quality of assembly, and the connection method between the segments mainly relies on a combination of connections such as bolts and locating pins. However, most of the existing locating pins are made of metal. Such metal locating pins are not only heavy and costly, but also easily damage the concrete segments during installation. In addition, metal locating pins are prone to rust, posing a hidden danger to the long-term safe use of the shaft. Although the locating pins with an all-rubber structure have been improved in some aspects, they are not suitable for use due to their poor shear resistance and frequent shear failure. At the same time, although the shear pins imported from abroad have excellent overall performance, their high cost also limits their widespread application.

[0004] Therefore, designing a firm, stable and reliable locating pin for a pipe segment is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In response to the problems existing in the background technology, this utility model patent aims to provide an improved pipe segment locating pin assembly to overcome the shortcomings of the existing technology and improve the quality and service life of pipe segment assembly.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is to design a pipe segment positioning pin assembly, which consists of an internal shear pin and an external pin sleeve. The internal shear pin is a shaft sleeve type structure, and the external pin sleeve is arranged on the outside of the internal shear pin. The external pin sleeve has an "olive" shape, which is large in the middle and small at both ends.

[0007] Furthermore, the internal shear pin is made of 65Mn material, has a heat treatment hardness of 458-544HV, and is surface oxidized.

[0008] Furthermore, the outer pin sleeves are spaced apart in a layered structure, ensuring that they have very strong compressibility.

[0009] Furthermore, the upper and lower ends of the external pin sleeve are provided with rounded corners, which can be easily aligned and installed when matched with the tapered hole of the pipe segment.

[0010] Furthermore, the raised portion in the middle of the outer pin sleeve is slightly larger than the joint of the two connected pipe segments, thereby ensuring a certain degree of compression.

[0011] Furthermore, the outer pin sleeve is made of synthetic rubber material.

[0012] Furthermore, carbon black material is added to the synthetic rubber material of the external pin sleeve, which has higher load-bearing performance and buffering performance, as well as high wear resistance and flexibility resistance.

[0013] Beneficial effects achieved by the utility model:

[0014] The segment locating pin assembly of this patented utility model adopts low-cost 65Mn material and synthetic rubber, which greatly reduces the manufacturing cost while ensuring the cost-effectiveness of the product. The internal shear pins that have undergone surface oxidation treatment have greatly improved their corrosion resistance and extended their service life. The external pin sleeves are made of synthetic rubber material with added carbon black, which not only has excellent load-bearing performance, but also has excellent wear resistance and flexibility resistance, and can adapt to various harsh construction environments. The unique "olive"-shaped structural design enables the locating pin assembly to accurately align and correct the segments, ensuring improved assembly quality. In addition, the internal shear pins have been heat-treated to exhibit strong shear resistance, effectively preventing shear failure. The utility model excels in weight, cost, corrosion resistance, load-bearing performance, ease of installation, positioning accuracy and shear resistance. It is very suitable for modern caisson construction and can significantly improve the service life and safety of the shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a cross-sectional view of the present invention.

[0017] Figure 2 It is a schematic diagram of the appearance of the utility model.

[0018] Figure 3 This is a schematic diagram of the use of the present utility model.

[0019] Among them, 1-internal shear pin, 2-external pin sleeve. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device. Example

[0021] like Figure 1 、 Figure 2 and Figure 3 As shown, a segment locating pin assembly consists of an internal shear pin 1 and an external pin sleeve 2.

[0022] The internal shear pin 1 is made of 65Mn. This material has excellent mechanical and processing properties, meeting the strength and hardness requirements of the locating pin. The internal shear pin 1 is designed as a sleeve-type structure, which provides stable support and transmits shear force. At the same time, its shape and size match the holes in the pipe segment, ensuring precise insertion and fixation. The internal shear pin 1 undergoes heat treatment to a hardness of 495HV, thereby enhancing its shear resistance and service life. In addition, the surface is oxidized, which not only improves corrosion resistance but also further enhances the durability of the locating pin.

[0023] The external pin sleeve 2 is made of synthetic rubber material. This material has good elasticity, wear resistance and corrosion resistance, and can adapt to various harsh construction environments. Carbon black and other substances are specially added to the rubber. These additives can not only improve the load-bearing performance and cushioning performance, but also enhance wear resistance and flexibility. The external pin sleeve 2 has an overall "olive"-shaped structure, which enables the locating pin assembly to be easily aligned and installed in the tapered hole of the pipe segment. At the same time, the upper and lower ends of the external pin sleeve are designed with rounded corners to better match the tapered hole of the pipe segment and reduce resistance during installation. The raised part in the middle of the external pin sleeve 2 is slightly larger than the joint of the two connected pipe segments, which ensures a close connection between the pipe segments and improves the stability and sealing of the pipe segment assembly.

[0024] Specific construction method:

[0025] In practice, construction workers first insert the inner shear pin 1 into the hole in the segment to be connected, then slide the outer pin sleeve 2 over the inner shear pin 1. Due to the special design of the outer pin sleeve 2, it can be easily aligned with the tapered hole in the segment and inserted. When the two segments are connected by the locating pin assembly, the raised portion of the outer pin sleeve 2 ensures a tight fit between the segments, thereby improving the quality of the segment assembly. This locating pin assembly is not only lightweight and low-cost, but also easy to install and precise positioning. It is ideally suited for modern caisson construction and can significantly improve the service life and safety of the shaft.

[0026] The above describes in detail the segment locating pin assembly provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. It should be noted that those skilled in the art may, without departing from the principles of the present invention, make various improvements and modifications to the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A segment locating pin assembly, comprising an inner shear pin (1) and an outer pin sleeve (2), characterized in that: The internal anti-shear pin (1) is a shaft sleeve type structure, and the external pin sleeve (2) is sleeved on the outside of the internal anti-shear pin (1). The external pin sleeve (2) has an "olive" shaped structure, which is larger in the middle and smaller at both ends.

2. A segment positioning pin assembly according to claim 1, characterized in that: The outer pin sleeves (2) are spaced apart to form a spaced layer structure.

3. A segment positioning pin assembly according to claim 2, characterized in that: The upper and lower ends of the outer pin sleeve (2) are provided with rounded corners.

4. A segment positioning pin assembly according to claim 3, characterized in that: The raised portion in the middle of the outer pin sleeve (2) is slightly larger than the joint of the two connected pipe segments.

5. A segment positioning pin assembly according to any one of claims 1 to 4, characterized in that: The internal shear pin (1) is made of (65) Mn material, heat-treated to a hardness of (458)- (544) HV, and the surface is oxidized.

6. A segment positioning pin assembly according to any one of claims 1 to 4, characterized in that: The outer pin sleeve (2) is made of synthetic rubber material.

7. The segment positioning pin assembly according to claim 6, characterized in that: Carbon black material is added to the synthetic rubber material of the outer pin sleeve (2).

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