Improved lift valve device

Abstract

The invention discloses an improved lift valve device, comprising an air cylinder, a mounting plate, a sealed cabin, a fixing clamping rod, a fixing cross rod, a compression ring, a sealing packing, acompression ring groove, a gas inlet pipe, a compressed air pipe, a two-way solenoid valve, a valve shaft, a valve plate, a valve seat, an exhaust pipe, a base and a two-station five-way solenoid valve. The two ends of the air cylinder control the opening-closing state of the lift valve by controlling the two-station five-way solenoid valve; a high-pressure gas inlet hole and a high-pressure gasoutlet hole and / or gas outlet ring are arranged on the periphery of the valve seat in the circumferential direction, a sealing ventilation pipe is arranged on the position, close to the valve, of valve seat, on the gas inlet pipe in the mode of corresponding to the high-pressure gas inlet hole, and the valve seat is lifted through high-pressure gas to isolate waste gas in the gas inlet pipe so asto improve the sealing property. According to the improved lift valve device, by arranging the compression ring, the compression ring groove and the sealing packing, the airtightness and stability ofthe valve shaft are improve; and through the fixing clamping rod and the fixing cross rod, rotation of the valve shaft is prevented, and through the local positive-pressure high-pressure gas at the valve seat, the sealing isolation effect on the waste gas is improved.

Description

technical field [0001] The invention relates to exhaust control technology, in particular to an improved poppet valve device. Background technique [0002] Poppet valve is a commonly used valve device in exhaust gas treatment system. However, in the prior art, due to the hard sealing structure of the traditional poppet valve of the organic waste gas regenerative incineration device, there is a small gap between the valve plate and the valve seat of the poppet valve, so the airtightness of the poppet valve is not high. Especially after the system has been running for a period of time, the valve plate is prone to deformation and rotation due to the frequent fit between the valve plate and the valve seat, which increases the gap between the valve plate and the valve seat, thereby further reducing the airtightness of the poppet valve. , the exhaust gas will escape directly to the atmosphere through the gap, thereby reducing the treatment efficiency of the entire set of environm...

AI Technical Summary

Problems solved by technology

However, in the prior art, due to the hard sealing structure of the traditional poppet valve of the organic waste gas regenerative incineration device, there is a small gap between the valve plate and the valve seat of the poppet valve, so the airtightness of the poppet valve is not high. Especially after the system has been running for a period of time, the valve plate is prone to deformation and rotation due to the frequent fit between the valve plate and the valve seat, which increases the gap between the valve plate and the valve seat, thereby further reducing the airtightness of the poppet valve. , the exhaust gas will escape directly to the atmosphere through the gap, thereby reducing the treatment efficiency of the entire set of environmental protection facilities and increasing air pollution;

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