CN2213265Y

CN2213265Y - Automatic resetting fire-proof valve

Info

Publication number: CN2213265Y
Application number: CN 94247948
Authority: CN
Inventors: 贺绮华; 郎良成
Original assignee: ZHONGDA ENGINEERING EQUIPMENT MANUFACTURING Co Ltd YANGZHOU CITY
Current assignee: Jinzhong Large Engineering Equipment Mfg. Co., Ltd., Jiangsu Prov.
Priority date: 1994-12-23
Filing date: 1994-12-23
Publication date: 1995-11-22
Anticipated expiration: 2004-12-23

Abstract

The utility model relates to an automatic resetting fireproof valve, which is characterized in that one end of a tension spring which is used for starting and closing a vane is fixed to a linkage rod of the vane and the other end is fixed to an outer frame board of a valve. A fireproof actuating mechanism is formed by that a thermosensitive spring of shape-memory alloy of 70 DEG C is sheathed on a slide shaft rod, and is fixed between a bracket of the vane and the outer frame board of the valve. Compared with a traditional fireproof valve, the utility model has the advantages of repeated use of the thermosensitive spring by myriad times without failure and sensitive and reliable actions. An electromagnet, a micro motor, a locking mechanism, a temperature fuse, etc., in the traditional fireproof valve are not required. The automatic resetting fireproof valve simplifies design, provides convenience for maintenance, and saves expenses. The utility model is suitable for fireproof valves of various buildings.

Description

Automatic resetting fire-proof valve

The utility model relate to the refractory protection that uses in the building, particularly a kind of can automatically reset fire-protection valve.

At present, in some important buildings, generally need fire-protection valve be set at the inlets and putlets of ventilation place of ventilation and air conditioning system.Traditional fire-protection valve is to adopt 70 ℃ of low melting alloy fus actuators.Fire-closing valve is often opened at ordinary times, when breaking out of fire, and the fusing of temperature low melting alloy sheet, the blade of fire-closing valve is closed under the effect of extension spring, with blocking-up flame, prevents fire spreading.But after the fire, when the needs fire-closing valve is opened once more, need from new replacing temperature low melting alloy sheet, and need manually open fire-closing valve.

The purpose of this utility model is, design applying shape memory alloy temperature sensing spring is as fire prevention actuator, by valve blade linkage, the unlatching of autocontrol valve is closed, and the unlatching that can automatically reset, to improve automaticity, need not change fuse sheet, do not need manually to open fire-closing valve and reset, with simplified apparatus, save the maintaining expense.

The fire-closing valve that automatically resets of the present utility model, the extension spring and the fire prevention actuator that are opened and closed by vane-type shutter, volume adjusting apparatus, blade form, it is characterized in that, be provided with linkage rod between the support of blade, one end of the extension spring that blade opens and closes is fixed on the linkage rod, and an other end support is fixed on the valve exterior deckle board that is parallel to blade rotor; Fire prevention actuator is enclosed within on the sliding shaft rod by 70 ℃ of marmem temperature sensing springs and constitutes, end at temperature sensing spring is provided with the adjusting nut that is fixed on the sliding shaft rod, one end of sliding shaft rod is fixed on picking out on the bar of blade rack, and the other end passes the upper end hole that is fixed on the support on the valve exterior deckle board.

Using method of the present utility model is, during normal temperature, the extension spring power that blade opens and closes is greater than the faint rigidity of 70 ℃ of marmem temperature sensing springs, and the blade that drives fire-protection valve is in opening state; When fire takes place, 70 ℃ of marmem temperature sensing springs produce the variation of shape and recovery stress along with variation of temperature, and shape and recovery stress variation are to change according to given temperature rule, and this moment, temperature sensing spring can overcome extension spring power, and the blade that drives fire-protection valve is closed; After the fire, after air temperature dropped to normal temperature in the fire-protection valve pipeline of living in, 70 ℃ of marmem temperature sensing springs recovered faint rigidity, at this moment, extension spring power overcomes the faint rigidity of 70 ℃ of marmem temperature sensing springs again, and the blade that drives valve resets to opening state; Use so repeatedly, 70 ℃ of marmem temperature sensing springs can not lose efficacy yet.

The utility model has the advantages that: compare with the disposable 70 ℃ of low melting alloy fuss of traditional fire-closing valve, because 70 ℃ of marmem temperature sensing springs can use up to ten thousand times repeatedly, can not damage,, need not change fuse sheet so being active in one's movements of actuator is reliable; Valve is opened voluntarily at normal temperatures, when fire takes place, valve is closed automatically, after the fire, after the pipeline air temperature dropped to normal temperature, valve automatically reset to the entire work process of opening state again, do not need electricity consumption, need not adopt primary component DC electromagnet in traditional fire-closing valve, micro motor parts, gear reducer, locking mechanism, temperature fuse etc., simplify design, save user's maintaining expense.Be applicable to the fire-protection valve of various buildings.

Below in conjunction with drawings and Examples, the utility model is further described.

Fig. 1 is the structural representation of fire-closing valve of automatically reseting.

Fig. 2 is A-A section, the extension spring mounting structure schematic representation of Fig. 1.

Fig. 3 is the B-B section of Fig. 1,70 ℃ of marmem temperature sensing spring mounting structure schematic representation.

As seen from the figure, fire-closing valve automatically resets, the extension spring 4 and the fire prevention actuator 2 that are opened and closed by vane-type shutter 1, volume adjusting apparatus 3, blade form, it is characterized in that, be provided with linkage rod 7 between the support 8 of blade 6, one end of the extension spring 4 that blade opens and closes is fixed on the linkage rod 7, and the other end support is fixed on the valve exterior deckle board 5 that is parallel to blade rotor; Fire prevention actuator is enclosed within on the sliding shaft rod 13 by 70 ℃ of marmem temperature sensing springs 2 and forms, end at temperature sensing spring is provided with adjusting nut 12, one end of sliding shaft rod is fixed on picking out on the bar 14 of blade rack 10, and the other end passes the upper end hole 11 that is fixed on the support on the valve exterior deckle board.

Claims

1, a kind of fire-closing valve that automatically resets, the extension spring and the fire prevention actuator that are opened and closed by vane-type shutter, volume adjusting apparatus, blade form, it is characterized in that, be provided with linkage rod between the support of blade, one end of the extension spring that blade opens and closes is fixed on the linkage rod, and an other end support is fixed on the valve exterior deckle board that is parallel to blade rotor; Fire prevention actuator is enclosed within on the sliding shaft rod by 70 ℃ of marmem temperature sensing springs and constitutes, end at temperature sensing spring is provided with the adjusting nut that is fixed on the sliding shaft rod, one end of sliding shaft rod is fixed on picking out on the bar of blade rack, and the other end passes the upper end hole that is fixed on the support on the valve exterior deckle board.