CN2746224Y

CN2746224Y - Gas safety valve

Info

Publication number: CN2746224Y
Application number: CN 200420003103
Authority: CN
Inventors: 全龙浩; 董民超
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-02-11
Filing date: 2004-02-11
Publication date: 2005-12-14
Anticipated expiration: 2014-02-11

Abstract

The utility model relates to a gas safety valve, generally comprising a valve body, a handle and a sealing gasket. The utility model discloses the gas safety valve, and the lower end of the valve rod is provided with a rubber gasket and a sealing spring. The exterior of the valve rod bush at the upper part of the valve body is provided with a magnetic coil, a return spring and a sliding ring component. The upper end of the valve rod is provided with a compact and a shape memory alloy. When the ambient temperature rises, the shape memory alloy expands, or the gas leaks, the gas valve shuts automatically, which avoids the disaster caused by the gas leakage; simultaneously, the difficult problem that the gas valve can not shut off automatically when the fire disaster happens without power (under the condition of temperature rise).

Description

Fuel gas safety valve

Technical field

The utility model relates to a kind of combustion gas operative installations, and it can utilize self-contained battery, when gas leakage, cuts off combustion gas automatically, when the combustion gas tool burns, when ambient temperature surpasses when establishing definite value, cuts off gas supply automatically.Belong to the gas valve manufacturing.

Background technique

Combustion gas comprises rock gas, coal gas and liquefied petroleum gas (LPG), is the novel energy that develops rapidly over past ten years, combustion gas is used in a large number, be the performance of social progress and urban modernization, it has reduced the degree of municipal pollution widely, has also brought convenience and efficient to people simultaneously.But meanwhile, the disaster that causes because of gas leakage grows with each passing day, and it is compared with the general coal-fired fire that takes place, and has emergentness more, has more danger because of being difficult for discovering.At this type of problem, many enterprises have released the acoustic-optic alarm when being used for gas leakage or breaking out of fire in recent years.Though this class device has also played certain effect, owing to can only report to the police, can not block source of the gas, therefore can not get rid of hidden danger.Especially indoor nobody the time, even alarm work also can't block source of the gas.When no civil power, this class alarm is as illusory.

Summary of the invention

The purpose of this utility model provides a kind of fuel gas safety valve, can only report to the police when overcoming gas leakage, can not block source of the gas, therefore can not get rid of the drawback of hidden danger, a kind of fuel gas safety valve of the present utility model, it not only can be when Fuel Gas Leak Alarm be worked, automatic self-closing gas supply also can be when no any power source, because of ambient temperature when unusual, also can automatic self-closing gas, avoid the further expansion of the state of affairs.

The technological scheme that its technical problem that solves the utility model adopts is: fuel gas safety valve generally is made up of valve body, handle, sealing gasket, and this fuel gas safety valve is equipped with rubber gasket and Packing spring in the lower end of valve rod, and handle is equipped with on the top of valve body.It is characterized in that: magnetic coil, Returnning spring and slip ring assembly are equipped with in the outside of the top valve stem casing of valve body, the slip ring assembly can endwisely slip, between slip ring assembly and the valve rod steel ball is housed, steel ball is on the groove of pull bar upper end and valve stem casing in the corresponding hole, steel ball can stretch out a part and snap in the sliding assembly inwall from this hole, briquetting and marmem are equipped with in the upper end of valve rod, and briquetting and marmem can endwisely slip.

Ambient temperature raised shape memory alloy expands, or there is the magnetization of electrical signal magnetic coil all can cause the slip ring assembly to move down, loosen constraint to steel ball, steel ball outwards moves and breaks away from stem groove, under the downward active force of Packing spring, rubber gasket is stopped up the valve inlet hole, block combustion gas.

The beneficial effects of the utility model are: during gas leakage, in the time of alarm equipment alarm, automatic self-closing gas has been avoided the disaster brought because of gas leakage, the problem that (temperature rising) also can automatic self-closing gas under power free situation when also having solved the generation fire simultaneously.

Description of drawings

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

Accompanying drawing is that the safety valves for gas reveal cuts open schematic diagram.

Among the figure, 1. valve body, 2. rubber gasket, 3. set screw nut, 4. Packing spring, 5. valve stem casing, 6. valve rod, 7. magnetic coil, 8. Returnning spring, 9. steel ball, 10. briquetting, 11. anti-decylizations, 12. marmems, 13. gland, 14. attachment screws, 15. handles, 16. the slip ring assembly, 17. shells, 18. power plugs.

Embodiment

At first with Packing spring (4), rubber gasket (2), be inserted in valve rod (6) successively, with set screw nut (3) rubber gasket (2) valve rod (6) is fixed as one, after the valve rod (6) that will have Packing spring (4) and a rubber gasket (2) from bottom to top pushes the inner chamber of valve stem casing (5), with valve stem casing (5) and valve body (1) one that spins, with magnetic coil (7), Returnning spring (8), slip ring assembly (16) is inserted in the outside of valve stem casing (5) successively, to prevent that the decylization (11) and the upper end of valve stem casing (5) spin, with briquetting (10), marmem (12) is inserted in the upper end of the valve rod (6) that exposes valve stem casing (5), exert oneself slip ring assembly (16) to pressing down, expose the circular hole on the valve stem casing (5), steel ball (9) is put into circular hole, pull out valve rod (6), make steel ball (9) to the groove of valve rod (6), slip ring assembly (16) moves up under the effect of Returnning spring (8) and blocks steel ball (9), will prevent that decylization (11) is rotatably connected in the nut place, upper end of valve stem casing (5) after valve rod (6) can not be moved down.Briquetting (10) marmem (12) is inserted in the upper end of the valve rod (6) that spills valve stem casing (5).Be connected firmly with attachment screw (14) after handle (15) being pressed into the upper end of valve rod (6), shell (17) is inserted in valve stem casing (5) from the top down, and shell (17) spins with the lower thread of valve stem casing (5).Gland (13) is pressed into handle (15), has sealed attachment screw (14), and power plug (18) is with the lead bonding of magnetic coil (7), and so far fuel gas safety valve is all assembled and finished.

Upwards spur handle (15), owing to there is attachment screw (14) to be connected with valve rod (6), therefore valve rod (6) together moves up, because valve rod (6) is connected as a single entity with set screw nut with rubber gasket (2), therefore rubber gasket (2) together moves up, at valve rod (6) when moving up, move to the parallel place of groove with the steel ball (9) of valve rod (6), steel ball (9) is moved up under the influence of the end thrust of Returnning spring (8) by slip ring assembly (16) and clamp-ons in the groove of valve rod (6), after handle (15) unclamps, valve rod (6) is blocked and can not move down by steel ball (9), because of rubber gasket (2) moves up, opened the inlet hole of valve body (1), so valve body there is combustion gas to pass through.

When ambient temperature rises, when rising to the deformation temperature of marmem (12), marmem (12) begins to expand, and to lower compression briquetting (10), briquetting (10) is to lower compression slip ring assembly (16), slip ring assembly (16) is when moving down, decontroled the constraint of steel ball (9), steel ball (9) outwards moves, and valve rod (6) is under the elastic force of Packing spring (4), move down, rubber gasket (2) stops up combustion gas with the air inlet of valve body (1) can't be passed through.

Pass through power plug (18) as electrical signal, and when exporting to magnetic coil (7), magnetic coil (7) produces bigger magnetic force, because slip ring assembly (16) is that the magnetic induction material is made, therefore the magnetic attraction that is produced by coil (7), slip ring assembly (16) moves down, decontroled constraint to steel ball (9), steel ball (9) outwards moves, cause valve rod (6) under the elastic force of Packing spring (4), move down, rubber gasket (2) can't pass through the inlet hole obstruction combustion gas of valve body (1).

Claims

1, fuel gas safety valve, described fuel gas safety valve is generally by valve body, handle, sealing gasket is formed, this fuel gas safety valve is equipped with rubber gasket and Packing spring in the lower end of valve rod, handle is equipped with on the top of valve body, it is characterized in that: magnetic coil is equipped with in the outside of the top valve stem casing of valve body, Returnning spring and slip ring assembly, the slip ring assembly can endwisely slip, between slip ring assembly and the valve rod steel ball is housed, steel ball is on the groove of pull bar upper end and valve stem casing in the corresponding hole, steel ball can stretch out a part and snap in the sliding assembly inwall from this hole, briquetting and marmem are equipped with in the upper end of valve rod, and briquetting and marmem can endwisely slip.