Expanding device of moving block

A technology of moving blocks and expanding blocks, which is applied in the processing or treatment of steel pipes, can solve the problems of small heat transfer coefficient, large thermal expansion coefficient, and large shrinkage of stainless steel plates, and achieve low manufacturing costs, reduce or weld deformation, and eliminate The effect of welding deformation
CN101992235AInactive Publication Date: 2011-03-30JIANGSU UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
JIANGSU UNIV OF SCI & TECH
Publication Date
2011-03-30
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an expanding device of a moving block, comprising a pull rod, an expanding head, an expanding block, a guiding disc, a sleeve barrel, a positioning block, a locking handle and a stop disc, wherein the pull rod is arranged in the sleeve barrel; one end of the pull rod is extended out of the sleeve barrel and is sequentially sleeved with the circular stop disc, the pyramidal expanding head and the circular guiding disc which are respectively provided with a center hole; the other end of the pull rod, which is extended out of the sleeve barrel and is provided with screw threads, passes through a hole arranged on the positioning block and is connected with the locking handle by screw threads; the expanding head is fixedly connected with the pull rod; and a plurality of T-shaped grooves connected with the expanding block are arranged on the pyramidal surface of the expanding head by equal distance. The expanding device of the moving block has simple structure and low manufacturing cost, is convenient to assemble and disassemble and can effectively reduce or eliminate the welding deformation of a vessel or a steel tube.
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Description

technical field

[0001] The invention belongs to the technical field of processing or treating steel pipes such as pressure vessels, and relates to an expansion tool for welding steel pipes such as pressure vessels. Background technique

[0002] Pressure vessel is a kind of pressure-bearing equipment widely used in almost all industrial production and daily life. Especially for stainless steel pressure vessels, due to the complicated conditions of use, the medium is special, such as flammable, toxic, corrosive, etc.; and there is a danger of explosion. Once an accident occurs, the consequences will be catastrophic, which will bring huge losses to the country, enterprises, and personal life and property. Therefore, it will be extremely important to ensure the manufacturing quality of stainless steel pressure vessels. However, due to the small heat transfer coefficient and large thermal expansion coefficient of the stainless steel pressure vessel, the stainless steel pressure...

Claims

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