Main oil cylinder support bracket and pressing device for cast-iron pipe hydrostatic testing machine

Abstract

The invention discloses a main oil cylinder support bracket and a pressing device for a cast-iron pipe hydrostatic testing machine, comprising two connecting bases fixed on the opposite surface of the surface of a fixed main oil cylinder (5) on a retaining wall (10). The two connecting bases are symmetrically distributed at two sides of the cylinder body of the main oil cylinder; an adjusting bolt is arranged on each connecting base; a pressure block is arranged at the end part of the adjusting bolt and is pressed on the cylinder body of the main oil cylinder (5). By adopting the above technical scheme, the assembling integral rigidity of the retaining wall and the main oil cylinder is enhanced through the main oil cylinder support bracket and the pressing device, the vibration of the main oil cylinder is reduced, the safety and reliability of the system are greatly improved, and the integral service life of the main oil cylinder and a hydrostatic testing machine is improved.

Description

technical field [0001] The invention belongs to the technical field of production equipment in the metallurgical industry, and relates to a hydraulic testing machine for testing and testing cast iron pipes. More specifically, the invention relates to a supporting bracket and a pressing device for a main cylinder of a hydraulic testing machine for cast iron pipes . Background technique [0002] Ductile iron pipe is a pipe produced by centrifugal casting process. It has the characteristics of excellent mechanical properties, metal saving, simple construction, economical cost, high reliability, good corrosion resistance and long service life. It is widely used in water supply, fire protection and sewage discharge. , gas transmission and other pipeline projects. In recent years, with the improvement of people's ability to understand the product, the points of use and the amount of use have been greatly improved, and the output of centrifugal ductile iron pipes has developed rap...

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Problems solved by technology

[0004] In the traditional installation method, there are the following problems: first, the oil cylinder is installed horizontally; second, the oil cylinder is installed on the front flange, and the cylinder part is long; third, considering the maintenance and replacement of the oil cylinder, the cylinder and the retaining wall hole There is a certain gap between them, so the cylinder is in a cantilever state during the pressing process, and under the action of the exciting force of the water pressure, the stress condition is poor

Moreover, the normal water pressure process is unstable. Due to the fluctuation of water pressure, the main cylinder of the hydraulic machine is subjected to a large vibration thrust, and the short-term rapid water pressure release will also aggravate the vibration of the main cylinder, which is unstable. The main cylinder will produce local stress concentration, greatly reducing the life

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