Elastic sealing structure of special lift valve for soot blowing pipeline

Abstract

The invention discloses an elastic sealing structure of a special lift valve for a soot blowing pipeline. The elastic sealing structure of the special lift valve for the soot blowing pipeline comprises a valve body, wherein a through hole is formed in the upper end of the valve body; a valve sleeve is arranged in the through hole, and is in interference fit with the through hole; a valve rod is arranged in the valve sleeve and is in slip clearance fit with the valve sleeve; the lower end of the valve rod penetrates through the valve sleeve so as to extend into the valve body; and a sleeve block is fixedly arranged at the upper end of the valve sleeve. According to the elastic sealing structure of the special lift valve for the soot blowing pipeline provided by the invention, an elastic groove is arranged on a valve clack sealing face of an elastic valve clack, a sealing gasket is fixedly adhered onto the valve clack sealing face of the elastic valve clack through an adhesive, the sealing face has a certain elasticity, the valve clack sealing face is upwards pushed and pressed by medium pressure so as to produce micro-deformation along with the rising of the medium pressure, and thevalve clack sealing face and a valve seat sealing face form line sealing contact, so that an effect on tightly sealing is achieved; and in addition, due to the arrangement of the elastic groove, thestructure can achieve a sealing effect with a less closing force.

Description

technical field [0001] The invention relates to the technical field of a special lift valve for a soot blowing pipeline, in particular to an elastic sealing structure of a special lift valve for a soot blowing pipeline. Background technique [0002] The soot blowing pipeline is one of the parts of the soot blower. The soot blower is a device used to remove the ash accumulation on the heating surface of the boiler. It is generally installed on the furnace wall of the boiler furnace, horizontal flue and tail flue, etc. . According to the structure type, there are several types such as gun type, rotary type and telescopic type. According to the different media used, there are three types of air soot blowers, steam soot blowers and hydraulic soot blowers. The air soot blower uses the impact force of the high-pressure airflow of compressed air to blow off the dust accumulated on the heating surface; it is often used in industrial boilers. The steam soot blower uses the high-sp...

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Problems solved by technology

[0003] The poppet valve is an important part of the soot blowing pipeline. After the soot blowing, the valve must be closed immediately. Since the valve is closed by the force of the spring return and the residual steam pressure, the closing force is small, so it must be closed. To achieve sealing, the sealing surface finish and flatness of the valve are extremely high. The existing poppet valve sealing structure is similar to the flat sealing structure of the globe valve, and the sealing surface is easily damaged due to high temperature deformation and insufficient sealing surface finish. Leakage, the structure requires a large closing force, therefore, we propose an elastic sealing structure for the special poppet valve of the soot blowing pipeline

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