CN2729460Y

CN2729460Y - Check-valve for discharging oil fume and fire-proof

Info

Publication number: CN2729460Y
Application number: CN 200420078726
Authority: CN
Inventors: 杭兆全
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-17
Filing date: 2004-08-17
Publication date: 2005-09-28
Anticipated expiration: 2014-08-17

Abstract

The utility model relates to a check-valve for discharging oil fume and fire-proof, arranged on the access of discharging pipes of residents and buildings. The back side of the valve sheet is provided with a temperature control device which is composed of a temperature control sensor, a rotary crank, a fork and a tension spring. The temperature control sensor is a sheet metal spirally wound round a pin shaft; one end of the sheet metal is welded on the pin shaft, and the other end is provided with a downward tab. The upper section of the fork is provided with a lug which is abutted with the tab of the spiral temperature sheet metal. The rotary crank is hung on the fork hook on the upper part and attached to the tension spring pothook at the lower part at the same time. The spiral temperature sheet metal can rotate by thermal expansion. When the fire starts indoors, the tab can be shifted by the high-temperature flue gas and disengage from the fork; the fork rotates and escapes from the crank; the crank under the action of the spring rotates 90 DEG quickly and is abutted with the valve sheet; the valve sheet can not be opened for isolation, avoiding the high-temperature flue gas extending to the discharging pipelines of inner floors. The utility model is provided with an upward wind board to prevent filling smoke or tainting by odour.

Description

Oil extraction flue gas anti-fire check valve

Technical field

The utility model relates to a kind of cooking-fume discharging anti-fire check valve, is mainly used in high level or the multi-storey building, and the kitchen oil flue gas outlet pipe of each resident family and the access port of building gas exhaust duct make indoor oil smoke gas get rid of by the building gas exhaust duct.

Background technique

High level or multi-storey building are provided with gas exhaust duct, usually the kitchen at each family is provided with the interface that communicates with this gas exhaust duct in the building, the smoke-ejecting pipe of kitchen range hood links to each other with gas exhaust duct by the outlet valve that is loaded on this interface, the oil smoke gas that cooker hood produces is pushed valve block open, thereby oil smoke gas is concentrated discharge by the smoke exhaust gas exhaust duct of building.

The present this shortcoming that is used for the outlet valve of gas exhaust duct interface is, when in the building during breaking out of fire of certain family, high-temperature flue gas and flare can enter gas exhaust duct by this valve, and and then seal in adjacent bed resident family from gas exhaust duct, the intensity of a fire is stretched rapidly, cause very big harm.

Summary of the invention

The utility model purpose provides a kind of smoke exhaust anti-fire check valve, and objective reality can intercept high-temperature flue gas and flare, avoids entering gas exhaust duct, thereby prevents that the intensity of a fire from stretching, and reduces the loss that fire causes.

This smoke exhaust anti-fire check valve is provided with valve casing, valve seat and valve block, valve block is fixed on the valve seat and can rotates around transverse axis by transverse axis and opens and closes, also be provided with temperature controlling device in the valve casing of valve block rear side, it is made up of temperature control sensor, rotary crank, shift fork and extension spring, wherein, temperature control sensor is that spirality is wrapped in a temperature sensing scissel composition on the fixing pin, and an end of spirality temperature sensing scissel is welded on the bearing pin, and the other end is provided with downward auricle; The pivot point of rotary crank is fixed on the valve casing, and shift fork has projection to cross and the auricle of spirality temperature sensing scissel contact mutually with the upper end, and the lower end is provided with recessed hook, and is fixed on the valve casing with fulcrum; The lower end of extension spring is fixed on the valve casing with fulcrum, and the upper end is provided with hook; Crank is hung on up the recessed hook of shift fork, and articulates with the below extension spring simultaneously.Said crank and shift fork are II type structure, and both sides, II type shift fork lower end hang II type crank by recessed hook block separately.The downside of valve casing is provided with catchment cup; Said valve casing is fastened by front and back two-part and forms.Said valve casing rear side is equipped with wind deflector upwards.

This check valve in normal operation, shift fork upper end offsets with the metal auricle of temperature control sensor, shift fork, crank, extension spring three connect successively, crank is in erectility away from valve block, valve block can free opening and closing.When abnormal conditions such as indoor breaking out of fire, high-temperature flue gas makes spirality temperature sensing scissel expanded by heating and rotates, make the auricle displacement and break away from shift fork, shift fork upper end loses supporting and is rotated down and breaks off relations with crank, the crank disequilibrium, and under the extension spring effect, revolve to the valve block direction rapidly and turn 90 degrees, front end contact valve block, valve block can't be opened, thereby high-temperature flue gas is isolated, avoid the gas exhaust duct in the building to stretch.The valve casing front portion of this valve is unloaded together with valve block is separable, and it is convenient to clean.Wind deflector can be avoided flue gas into gas exhaust duct neighbours are indoor to downstairs pouring in down a chimney or taint of odour.

Description of drawings

Fig. 1 is the structural representation of the utility model smoke exhaust anti-fire check valve.

Fig. 2 is the A-A sectional view of Fig. 1.Fig. 1 is that the C of Fig. 2 is to view.

Fig. 3 is B portion and the big figure of Fig. 2.

Fig. 4 is that the temperature control sensor rotation rear crank that is heated revolves state after turning 90 degrees.

Among the figure, 1-valve seat, 2-valve block, 3-lubricating cup, 4-II type shift fork, 4-1-shift fork fulcrum, the recessed hook of 4-2-, 4-3-projection, 5-1-valve casing front portion, 5-2-valve casing rear portion, 6-temperature-sensitive sensor, the 6-1-bearing pin, 6-2-spirality metal sheet, 6-3-auricle, 7-II type crank, 7-1-crank fulcrum, 8-wind deflector, the 9-extension spring, 9-1-extension spring fulcrum, 9-2-extension spring hook.

The tool mode of execution

The structure of the utility model valve is described below in conjunction with Fig. 1 and Fig. 2.Valve casing is fastened by anterior 5-1 of valve casing and valve casing rear portion 5-2 and forms (Fig. 2), and the lower end of valve casing is provided with lubricating cup 3, and the exhaust outlet of rear side is provided with wind deflector 8.The rotating shaft of valve block 2 is fixed on the valve seat 1, rotatablely closes or opens, and the rear side of valve block is provided with the temperature controlling device of being made up of temperature control sensor 6, II type crank 7, II type shift fork 4 and extension spring 9 (seeing Fig. 1, Fig. 2); Temperature control sensor 6 is made up of the temperature sensing scissel 6-2 that spirality is wrapped on the bearing pin 6-1, and an end and the bearing pin 6-1 of spirality metal sheet 6-2 are weldingly connected, and the other end is free end (Fig. 1), and is provided with auricle 6-3 (Fig. 1, Fig. 2); The both sides, lower end of II type crank 7 are fixed on the valve casing with fulcrum 7-1, and can rotate around fulcrum; Two lower ends of II type shift fork 4 respectively are provided with a recessed hook 4-2, and are fixed on the valve casing rotatable with the fulcrum 4-1 of both sides; The upper end of II type shift fork 4 offsets with the auricle 6-3 of projection 4-3 and spirality metal sheet and fixes, and two the recessed hook 4-2 hook II type cranks 7 in lower end make crank 7 be upright attitude; Crank 7 also hangs with two extension springs 9 simultaneously, and the lower end of extension spring 9 is fixed on the valve casing with fulcrum 9-1, and the upper end is hooked on the crank 7 with hook 9-2, and extension spring is in extended state.The visible crank 7 of Fig. 3 is hung in the recessed hook 4-2 of shift fork 4, and the upper end hook 9-2 of extension spring 9 simultaneously is hooked on the crank 7.

Fig. 1, Fig. 2 represent that II type crank 7 is subjected to the active force of shift fork 4 and extension spring both direction about in the of 9 simultaneously and is in erectility away from valve block 2, the normally opening and closing of valve block 2 this moment.Work as breaking out of fire, when flue-gas temperature surpasses 75 ℃, spirality metal sheet 6-2 expanded by heating and rotating, as Fig. 4, its free end turns over 30 degree together with auricle 6-3, II type shift fork 4 lose auricle supporting and to anticlockwise, II type crank 7 is promptly deviate from from recessed hook 4-2, is subjected to the contractile force of extension spring 9 to make II type crank 7 be rotated into horizontal attitude rapidly left simultaneously, and the contact valve block 2 left, it can't be opened, prevent high-temperature flue gas by smoke-ejecting pipe to other indoor stretching.

Claims

1. oil extraction flue gas anti-fire check valve, be provided with valve casing, valve seat and valve block, valve block is fixed on the valve seat and can rotates around transverse axis by transverse axis and opens and closes, it is characterized in that also being provided with temperature controlling device in the valve casing of valve block rear side, it is made up of temperature control sensor, rotary crank, shift fork and extension spring, and wherein, temperature control sensor is that spirality is wrapped in a temperature sensing scissel composition on the fixed pin shaft, one end of spirality temperature sensing scissel is welded on the bearing pin, and the other end is provided with downward auricle; The pivot point of rotary crank is fixed on the valve casing, and shift fork has projection to cross and the auricle of spirality temperature sensing scissel contact mutually with the upper end, and the lower end is provided with recessed hook; The lower end of extension spring is fixed on the valve casing with fulcrum, and the upper end is provided with hook; Crank is hung on up the recessed hook of shift fork, and articulates with the below extension spring simultaneously.

2. oil extraction flue gas anti-fire check valve according to claim 1 is characterized in that crank and shift fork are the ∏ type, and both sides, ∏ type shift fork lower end hang ∏ type crank by recessed hook block separately.

3. oil extraction flue gas anti-fire check valve according to claim 2 is characterized in that said extension spring is provided with two.

4. oil extraction flue gas anti-fire check valve according to claim 3 is characterized in that said valve casing is formed by front and back two-part fastening.

5. oil extraction flue gas anti-fire check valve according to claim 4 is characterized in that said valve casing rear side has wind deflector upwards.

6. according to claim 1 or 2 or 3 or 4 or 5 described oil extraction flue gas anti-fire check valves, it is characterized in that the downside of valve casing is provided with catchment cup.