Fire-preventing check valve

A check valve and fire damper technology, applied in the field of fire check valves, can solve problems such as unsatisfactory use effect, complex structure, heavy weight, etc., and achieve good fire prevention effect, good effect and long service life

Inactive Publication Date: 2008-01-02
李永彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing check valves used in extraction devices such as range hoods generally have pr

Method used

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  • Fire-preventing check valve
  • Fire-preventing check valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A fire check valve comprises a check valve pipe 1, a check valve device is arranged at the air inlet end of the check valve pipe 1, and a fire valve device with a spring-controlled opening and closing is arranged at the air outlet end of the check valve pipe.

[0016] The spring-controlled opening and closing fire damper device includes a guide shaft 3 arranged on a bracket 2, the bracket 2 is connected to the gas outlet end of the check valve pipe 1, a spring 4 is set on the guide shaft 3, and a fireproof valve can close the check valve pipe. The central part of the door 12 is inserted between the spring 4 and the guide shaft 3, and the free end of the central part of the fire door is connected to one end of the temperature control fuse 5, and the other end of the temperature control fuse 5 is connected to the spring fixed on the bracket 2 Hook 6 connection. The fire door is umbrella-shaped (or semi-circular, spherical and other suitable shapes). The check valve devic...

Embodiment 2

[0019] The check valve device includes a guide shaft 13, a spring 15 with one end of the front end of the guide shaft 13 in contact with the inner side of the check valve umbrella door (or semicircular, spherical, etc.) 16, the edge of the check valve umbrella is in contact with the inside of the windshield positioning protrusion 17 that is fixedly connected with the check valve pipe. The front end of the guide shaft is fixed on the axial cage 18 . When the range hood is on, the check valve umbrella door opens, and when the range hood is off, the umbrella door closes the valve under the thrust of the return spring. All the other are with embodiment 1.

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PUM

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Abstract

The invention discloses a fireproof retaining valve, comprising retaining valve tube. The retaining valve device is set at the air inlet of retaining valve tube and fireproof valve device, of which on-off is controlled by spring is set ate the air outlet of retaining valve tube. The fireproof valve device, of which on-off is controlled, comprises guiding shaft set on a bracket. The bracket is connected with the air outlet of retaining valve tube. The spring is set on the guiding shaft. The center of a fireproof door, which can close the retaining valve tube, is set between the spring and the guiding shaft. The free end of the center of fireproof door is connected with one end of melting piece controlled by temperature and the other end of melting piece controlled by temperature is connected with spring hook fixed on the bracket. The invention is provided with reasonable structure, good retaining valve action and fireproof action, convenient installation, long service life, stable performance and good effect.

Description

Technical field: [0001] The invention relates to a valve. Background technique: [0002] Existing check valves used in extraction devices such as range hoods generally have problems such as large volume, heavy weight, complex structure, and unsatisfactory use effects. Invention content: [0003] The purpose of the present invention is to provide a fire check valve with reasonable structure and good working performance. [0004] Technical solution of the present invention is: [0005] A fire check valve, characterized in that it includes a check valve tube, a check valve device is arranged at the inlet end of the check valve tube, a fire damper device is set at the gas outlet end of the check valve tube to control opening and closing, and the spring The fire damper device for controlling opening and closing includes a guide shaft set on the bracket, the bracket is connected with the gas outlet end of the check valve tube, a spring is set on the guide shaft, and a central ...

Claims

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Application Information

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IPC IPC(8): A62C4/04F24C15/20
Inventor 李永彬
Owner 李永彬
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