RU65504U1 - BRIDGE SUPPORT - Google Patents

Abstract

The utility model relates to the field of bridge construction and can be used in the construction of bridges of various designs. The supporting part of the bridge includes a steel lower balancer made with a spherical concave working surface on which a sheet of polymer antifriction material is placed and a steel upper balancer in contact with it with a supporting spherical surface, which is made in the contact zone with sheet polymer antifriction material with a polished surface and a contact layer . New in the proposed supporting part is that the contact layer is formed by surfacing the working surface of the upper balancer with 12Kh18N10T anti-corrosion steel. The technical result of the proposed utility model is to increase the manufacturability of the manufacture of support parts and reduce the cost of their manufacture. 1 n.p. f-ly, 3 ill.

Description

The utility model relates to the field of bridge construction and can be used in the construction of bridges of various designs.

A known supporting part of the bridge, including a lower balancer made with a spherical concave working surface on which a sheet of polymer antifriction material is placed, and the upper balancer in contact with it with a supporting spherical surface made of anticorrosive steel (TU-2530-048-01393697-2001, p. 3-7).

The disadvantages of this supporting part of the bridge are as follows: a limited method of cutting billets, a high percentage of waste (more than 50%) of expensive anticorrosive steel, and high manufacturing costs.

The closest in technical essence and the achieved result to the claimed is the supporting part of the bridge, including the lower element, made with a spherical concave working surface, on which the polymer sheet is placed

antifriction material, and the upper element in contact with it with a supporting spherical surface, which in the contact zone with sheet polymer antifriction material is made with a polished surface and coated with a layer of chromium with a thickness of at least 0.1 mm (RF Patent No. 2143024, publ. 20.12.99 )

The disadvantages of this design of the supporting part of the bridge are as follows:

- the process of applying a contact layer of chromium on work surfaces is time-consuming and low-tech, takes up large production areas and requires specific equipment;

- it is possible the formation of microcracks in the applied layer and, as a result, a decrease in durability;

- it is difficult to control the uniformity of the applied layer and adhesion to the base metal;

- the inability to fix the marriage (pores, shells, etc.) in the applied surface layer.

The proposed utility model solves the problem of improving the manufacturability of the manufacture of the supporting parts of the bridge and reducing the cost of their manufacture.

To solve this problem, in the supporting part of the bridge, including a steel lower balancer made with a spherical concave working surface on which the sheet polymer antifriction material is placed, and the upper steel balancer in contact with it, with a supporting spherical surface, which is in the contact zone with the sheet polymer antifriction material made with a polished surface and a contact working layer, the contact layer is formed by surfacing the working surface of the upper balancer with stainless steel 12X18H1 0T.

The essence of the utility model is illustrated by drawings, where

figure 1 shows the supporting part, a cut in the center of the supporting part;

figure 2 shows a section of the upper balancer in the center;

figure 3 presents the manufacturing diagram of the upper balancer of the proposed design.

The supporting part of the bridge consists of a steel lower balancer 1, an upper steel balancer 2 and a sheet of polymer antifriction material 3. The upper balancer is made of two parts - the main 4 and contact 5. The contact part 5 is formed by surfacing the working surface of the upper balancer 5 with 12X18H10T anti-corrosion steel. The thickness of the contact layer is 5-10 mm.

The manufacturing process of the upper balancer, presented in figure 3 is as follows.

A blank is made from sheet steel of 09G2S or 15KHSND steels. Then the workpiece is machined taking into account the allowances for surfacing. The workpiece is installed on the rotary table 6, by means of the welding head 7 and the deposited wire 8, the working surface of the upper balancer is surfaced with 12X18H10T anti-corrosion steel. Then, the deposited surfaces are machined and polished to the required roughness.

The supporting part of the bridge will work as follows.

In the process of deformations of the bridge span, the upper balancer 2 rotates relative to the lower balancer 1. During rotation, friction occurs, which should be reduced as much as possible. To reduce friction, sheet antifriction synthetic material 3 is used. In addition, the surface of the upper balancer must be smooth and resistant to abrasion. To this end, the contact layer 5 is made of antifriction steel.

The use of the proposed supporting part of the bridge can significantly reduce the amount of used expensive anti-corrosion steel and thereby reduce the cost of its manufacture. A method of manufacturing a contact layer by surfacing is more technologically advanced and less labor intensive compared to previously used ones; expensive specific equipment is not required. The thickness of the deposited contact layer is practically unlimited.

Claims (1)

The supporting part of the bridge, including a steel lower balancer made with a spherical concave working surface, on which a sheet of polymer antifriction material is placed and a steel upper balancer in contact with it with a supporting spherical surface, which is made in the contact zone with the sheet polymer antifriction material with a polished surface and contact a layer, characterized in that the contact layer is formed by surfacing the working surface of the upper balancer with anti-corrosion steel 12X18H10T.