Flow guide non-return device

A technology of check device and valve plate, which is applied in the direction of valve device, control valve, function valve type, etc., and can solve problems such as oil stain adhesion, large adhesion force, and difficulty in opening the valve plate

Active Publication Date: 2017-02-22
江西威尔森环保建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Residential exhaust check valves are required to have anti-smoke and odor and automatic fire prevention functions. Most of the fire check valves on the market currently close the valve by swinging the valve plate around the hinge shaft. The disadvantage is that all The exhaust flow is usually obliquely downward to form a wind curtain effect, which greatly reduces the exhaust effect of the exhaust duct
Furthermore, most fire check valves are sealed through surface-to-surface contact. Due to the large contact surface, oil stains will adhere to it after a long time, and the large adhesion force will make it difficult to open the valve plate, which directly affects the exhaust.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0033] like figure 2 As shown, it is a diversion check device provided by the present invention. The range hood or exhaust fan is connected to the exhaust pipe. When working, the air flows through the exhaust pipe to push the valve plate to rotate around the axis of the hinge, and the limit device When the valve plate is opened to a fixed angle, it forms an upward exhaust channel with the exhaust pipe and the frame, guiding the airflow to discharge upward, which can effectively prevent the generation of air curtain.

[0034] The pot-shaped concave surface of the valve plate can adjust the angle of the wind when the angle of the valve plate changes, so as to maintain the wind resistance and facilitate the opening of the valve plate.

[0035] like image 3 As shown, when the range hood stops, the valve plate falls back around the hinge axis and rotates to reset under the action of gravity, and presses the valve plate against the end of the exhaust pipe to prevent smoke and odo...

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Abstract

The invention relates to flow guide non-return devices, in particular to a flow guide non-return device. The flow guide non-return device comprises a valve plate, a hinge, an exhaust pipe and a frame. The valve plate with an L-shaped section moves in a pendular mode around the hinge to achieve opening and closing with the exhaust pipe so as to control the on-off state of air exhaust. The device is simple and reliable in structure, and flue gas emission is made to be more unobstructed through the upwards inclined air exhausting direction.

Description

technical field [0001] The invention relates to a diversion and non-return device, in particular to a diversion and non-return device. Background technique [0002] Residential exhaust check valves are required to have anti-smoke and odor and automatic fire prevention functions. Most of the fire check valves on the market currently close the valve by swinging the valve plate around the hinge shaft. The disadvantage is that all The exhaust flow is usually obliquely downward to form a wind curtain effect, which greatly reduces the exhaust effect of the exhaust duct. Furthermore, most fire check valves are sealed through surface-to-surface contact. Due to the large contact surface, oil stains will adhere to it over time, and the strong adhesion will make it difficult to open the valve plate, which directly affects the exhaust. Contents of the invention [0003] In order to overcome the above defects, the purpose of the present invention is to provide a diversion and non-retu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K15/03
CPCF16K15/03
Inventor 巫智园巫力游
Owner 江西威尔森环保建材有限公司
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