A kind of hinge displacement and expansion disc double ram

Abstract

The invention relates to a valve, in particular to a double disc capable of being unfolded through hinge shift. The double disc is composed of a left disc body 1 and a right disc body 2, wherein the left disc body 1 and the right disc body 2 are mutually attached to each other. The left disc body 1 and the right disc body 2 are of a circular shape and are mutually and closely attached together through a spring compaction structure. The upper side of the left disc body 1 and the upper side of the right disc body 2 are connected with a valve rod 8 through movable hinge mechanisms. A rolling marble 12 is arranged between the left disc body 1 and the right disc body 2. The left disc body 1 and the right disc body 2 are provided with roller paths (13 and 14) which are arranged on the inner side faces, where the two disc bodies (1 and 2) are mutually attached, of the two disc bodies (1 and 2) respectively. The flat shape of the roller path 13 or the roller path 14 on the disc body 1 or the disc body 2 on the single side is a conical groove, and the section shape of the groove in the depth direction is of an involute shape. The double disc has the advantages that the unfolding range of the two disc bodies is large, and performance is reliable and stable. Especially, when a valve is opened or closed, time and labor are saved, ascending and descending are easy and free, sealing performance is quite high, and zero leakage can be achieved. Accordingly, the double disc can be widely used for medium-and-high-pressure valves in the chemical industry, the petroleum industry, the natural gas industry, the sewage processing industry, the polymer injection industry and the like.

Description

technical field [0001] The invention relates to a valve used for petroleum and chemical pipelines, in particular to a hinge-displacement-expanding disc double-gate applied to a gate valve. Background technique [0002] Gate valve is a commonly used valve, which is widely used in petroleum and chemical pipelines. At present, the gate design of the common gate valves mostly adopts single plate, tapered wedge gate and various types of double gates and single and double plate gates with diversion holes. In use, there are generally disadvantages such as large opening and closing resistance, time-consuming and laborious, short service life, complicated manufacturing process, and high cost. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art, and to provide a hinge shifting and opening type disc double ram, which has small lifting resistance up and down and a large amount ...

AI Technical Summary

Problems solved by technology

In use, there are generally disadvantages such as large opening and closing resistance, time-consuming and laborious, short service life, complicated manufacturing process, and high cost.

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