Seal-air automatic switching valve for flue damper door

A technology of sealing air and automatic switching, applied in valve details, multi-port valves, valve devices, etc., can solve the problems of high cost, low operating cost and low cost of electric valves, and reduce the installation pipeline and auxiliary workload and cost. The effect of reducing and reducing the problem of jamming

Inactive Publication Date: 2012-10-24
SHANDONG GUOSHUN CONSTR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the existing sealing air supply system requires two electric valves, which are costly and prone to failure, the present invention provides a sealing air automatic switching valve for the smoke damper door, and the sealing air automatic switching valve for the smoke damper door The valve is not only easy to control, but also low cost and low operating cost

Method used

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  • Seal-air automatic switching valve for flue damper door
  • Seal-air automatic switching valve for flue damper door
  • Seal-air automatic switching valve for flue damper door

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1, a sealed air automatic switching valve 3 for a smoke damper door 1, is characterized in that: the cylindrical switching valve housing 31 with a pentagonal cross-section is a top plate equipped with an outlet pipe 33, and the two bottom sides are respectively The tee that intake pipe 32 is housed, the angle between two bottom sides is 60 degrees, and the air intake pipe is perpendicular to the bottom side, and the junction of the two bottom sides is an arc connection, and a rotating shaft 37 is housed in the arc, and a shaft that can be wound around is housed on the rotating shaft. Rotating flat valve plate 34 . In the side that the air intake pipe front end stretches into, its periphery is equipped with polyurethane sealing ring 38.

Embodiment 2

[0020] Embodiment 2, a sealed air automatic switching valve 3 for smoke damper door 1, characterized in that: a cylindrical switching valve housing 31 with a pentagonal cross section, and a flat plate on the top of the housing is equipped with a vertical air outlet pipe 33 , the two bottom sides are respectively equipped with the tee of the air intake pipe 32, the two bottom sides are at an angle of 60 degrees, the air intake pipe is perpendicular to the bottom side, and the joints of the two bottom sides are connected by an arc, and a rotating shaft 37 is housed in the arc, and the rotating shaft A flat valve plate 34 that can rotate around an axis is mounted on it.

[0021] The inner length of the bottom side of the housing where the front end of the air intake pipe extends into is 50 mm, and a polyurethane sealing ring 38 with a height of 5 mm is installed on the outer periphery of the air intake pipe mouth. The polyurethane sealing ring is composed of a steel frame 381 wel...

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PUM

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Abstract

The invention discloses a seal-air automatic switching valve for a flue damper door, belonging to an auxiliary device of a flue desulphurization device. The seal-air automatic switching valve is characterized in that an air outlet pipe is arranged on a flat plate at the top of a cylindrical switching valve shell of which the cross section is pentagonal, two bottom side surfaces of the cylindrical switching valve shell are respectively provided with a tee joint of an air feeding pipe, an included angle of the two bottom side surfaces is 60 DEG, the air feeding pipe is vertical to each bottom side surface, a connection part between the two bottom side surfaces is of circular arc connection, and a rotary shaft is arranged in the circular arc connection part and is provided with a planar valve plate capable of rotating around a shaft. The seal-air automatic switching valve disclosed by the invention has the beneficial effects that the automatic switching valve replaces two outlet electric valves of seal fans in the prior art so that the pipeline installing workload and auxiliary workload are reduced, the exhaust switch of the two seal fans can be automatically finished through the pressure of seal air, and other additional operations are not needed; and the rotary shaft with the planar valve plate is of a double-safety rotational structure, and the operation reliability of the seal-air automatic switching valve is greatly ensured.

Description

technical field [0001] The invention belongs to accessory equipment of desulfurization equipment, in particular to an air supply valve for sealing air used for flue gas baffle doors. Background technique [0002] Coal-fired and sintering flue gas contains air pollutant sulfur dioxide. In order to meet national and local emission concentration limit requirements, coal-burning and sintering flue gas desulfurization devices must be added. In the flue gas desulfurization device, the flue gas baffle door is one of the key equipment. In order to improve the sealing performance, it is necessary to continuously fill the hollow isolation cavity of the flue gas baffle door with isolation air for sealing. Considering that the flue gas baffle door The importance of each baffle door is equipped with 2 sets of centrifugal sealing fans (mutual backup), when one sealing fan fails, the other sealing fan will automatically switch to the working state. [0003] The general design is: under th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/052F16K27/02F16N1/00
Inventor 范贤平吕斌尹燕鲁吕扬刘峰
Owner SHANDONG GUOSHUN CONSTR GRP
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