High-power gate valve

Abstract

The invention relates to a high-power gate valve which comprises an upper box body, a lower box body, a gate plate and a screw rod, wherein a pipeline through hole is formed in the lower box body; the lower box body and the upper box body are vertically and fixedly mounted through a flange; a gate slot which is longitudinally communicated through a same shaft is formed in the upper box body and the lower box body; the gate plate is mounted in the gate slot in longitudinal gliding guide manner; the lower end of the screw rod is longitudinally mounted on one side of the gate plate; the upper end of the screw rod stretches out of the upper box body and is connected with a valve rod; a hydraulic assistance device is mounted at the top end of the screw rod; a rotary control knob is mounted on the hydraulic assistance device and used for selecting to use the hydraulic assistance device or lock the device. The high-power gate valve is scientific and reasonable in design, simple in structure, lower in cost, easy to operate and long in service life, the transmission power of the gate valve can be improved, time and labor are saved, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the field of pipeline dredging, in particular to a high-power gate valve. Background technique [0002] At present, the screw gate valve used in dredging pipelines is controlled by a turntable handle, and the screw is driven by manpower to turn the turntable handle to open or close the gate valve. Due to the large resistance of the silt and the small force of manpower, the operation is time-consuming and laborious. When the plate is opened or closed, a large pressure difference will be generated. For the pipeline with high pressure, it needs to be throttled first before operation. The work efficiency is low and the operation steps are cumbersome. [0003] After searching, the following relevant patent documents were found. [0004] A pneumatic rotary disc valve (CN201420869) includes: a valve seat with parallel double valve plates, a pneumatic actuator fixed on the valve seat through a bracket, and a connecting rod fixed at on...

AI Technical Summary

Problems solved by technology

[0002] At present, the screw gate valve used in dredging pipelines is controlled by a turntable handle, and the screw is driven by manpower to turn the turntable handle to open or close the gate valve. Due to the large resistance of the silt and the small force of manpower, the operation is time-consuming and laborious. When the plate is opened or closed, a large pressure difference will be generated. For the pipeline with high pressure, it needs to be throttled before operation. The work efficiency is low and the operation steps are cumbersome.

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