Steel pipe clamp

Abstract

The invention relates to clamping equipment of machinery in chemical industry, in particular to a steel pipe clamp. The steel pipe clamp comprises a sleeve and a four-connecting-rod mechanism, a first nut is arranged on a threaded rod which is arranged in the sleeve, the threaded rod penetrates out of the rear end of the sleeve and is locked at the rear end of the sleeve through the first nut, the four-connecting-rod mechanism penetrates into the front of the sleeve through an open slot and comprises a rear hinge joint point, two middle hinge joint points and a front hinge joint point, a clamp body with a bent portion is arranged at each of the front ends of two front rods, and the bent potions of the two clamp bodies are opposite. The steel pipe clamp has the advantages that the defects of complexity in mechanism and inconvenience in manual operation in the prior art are overcome, and the steel pipe clamp is adjustable in caliber and convenient for manual operation and is used for clamping small-diameter steel pipes.

Description

technical field [0001] The invention relates to a clamping device for chemical industrial machinery, in particular to a steel pipe clamp. Background technique [0002] When the steel pipe expanding machine carries out the overall diameter expansion of the steel pipe, it is necessary to rotate the weld seam of the steel pipe to the top and clamp it with the steel pipe clamp to make the steel pipe feed or retreat. Steel pipe clamps on foreign steel pipe expanding machines mostly use hydraulic cylinders and eccentric wheel mechanisms. Its shortcoming is that, to clamp steel pipes with different wall thicknesses with eccentric wheels, height adjustment gaskets need to be added under the jaws, which is inconvenient to operate; the clamping is not reliable enough due to the error of the steel pipe wall thickness. [0003] For this reason, Chinese patent CN201046485 discloses a steel pipe clamp. There are two lug plates on the front of the clamp seat. The lug plate flange mounting...

AI Technical Summary

Problems solved by technology

Its shortcoming is that, when clamping with eccentric wheel, for steel pipes with different wall thickness, it is necessary to add a height adjustment gasket under the jaw, which is inconvenient to operate; due to the error of steel pipe wall thickness, the clamping is not reliable enough

[0004] Adopting the structure described in Chinese patent CN201046485, the overall structure of the hydraulic cylinder and piston rod is relatively complicated and bulky, and it is not convenient for the operator to clamp the steel pipe with a small diameter

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