Cutting device for raw coke oven gas pipeline

Abstract

The invention provides a cutting device for a raw coke oven gas pipeline. The cutting device is sealed by adopting a knife-like sealing pair; a superposition of asbestos and a stainless steel plate is replaced with an STL (Stellite Alloy) arc plate; a soot blower is arranged at the bottom of the STL arc plate; meanwhile, a supporting shaft is sealed by adopting a graphite packing. The cutting device has the advantages of simple structure, ingenious design, reduced maintenance times, and no accumulated soot on the sealing pair and at the bottom of a valve body; wear and high temperature resistance of a provided sealing butterfly plate are provided, service life of equipment is prolonged, and the like.

Description

technical field [0001] The invention belongs to the field of coal gas dust removal, in particular to a raw gas pipeline cutting device. Background technique [0002] In the raw gas pipeline cutting device currently on the market, there are the following problems: [0003] (1) The valve body it adopts is sealed by a sealing pair that is in contact with the surface. Once the dust is accumulated, it cannot be removed, and even more dust may be accumulated due to the extrusion of the sealing butterfly plate and the valve seat, and finally the sealing butterfly The plate cannot be closed, and the sealing pair cannot play the role of sealing; [0004] (2) Asbestos and stainless steel are used for sealing in the sealing butterfly plate. Asbestos will wear out under the long-term erosion of air flow, and asbestos will harden at high temperature, so it cannot play a sealing role; [0005] (3) The side of the sealing butterfly plate facing away from the airflow direction, because th...

AI Technical Summary

Problems solved by technology

[0003] (1) The valve body it adopts is sealed by a sealing pair that is in contact with the surface. Once the dust is accumulated, it cannot be removed, and even more dust may be accumulated due to the extrusion of the sealing butterfly plate and the valve seat, and finally the sealing butterfly The plate cannot be closed, and the sealing pair cannot play the role of sealing;

[0004] (2) Asbestos and stainless steel are used for sealing in the sealing butterfly plate. Asbestos will wear out under the long-term erosion of air flow, and asbestos will harden at high temperature, so it cannot play a sealing role;

[0005] (3) The side of the sealing butterfly plate facing away from the airflow direction, because the airflow will generate vortices, dust or impurities are easy to accumulate here, and the accumulated dust will make the valve unable to close if it is too high;

[0006] (4) There is no seal between the support shaft and the support bearing. The air flow will bring impurities such as gas ash into the gap between the support shaft and the bearing. After cooling down, it will solidify into a state similar to cement, which is extremely difficult to remove;

[0007] (5) After the dust enters the bearing, the rotation of the valve stem will wear copper chips, and then drive the copper chips to block the bearing, making it impossible to rotate the valve stem

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