CN2380772Y - Safety intelligent valve for gas - Google Patents

Abstract

The utility model relates to a civil pipeline gas safety intelligent valve, which is provided with a piston in the air intake passage at the front end of the air inlet of the air chamber, and is connected with the force arm, the force arm bolt and the rubber diaphragm in the air chamber through a push rod. When in use, due to the air pressure in the air chamber, the rubber diaphragm bulges and drives the power arm to push the piston away from the air inlet to keep the air path unblocked. Once the gas supply is interrupted or the output gas hose falls off, and the gas flow rate increases suddenly due to burning through, the air pressure in the gas chamber suddenly drops, the swelling of the rubber diaphragm is eliminated, the force arm is relaxed, the piston blocks the air inlet under the thrust of the spring, and the gas is cut off. gas source to prevent gas leakage.

Description

Gas Safety Smart Valve

The utility model relates to a civil pipeline gas safety device which utilizes the automatic control of gas pressure. When the gas supply is interrupted and the gas transmission hose of the connected cooker falls off and burns through, the gas safety intelligent valve can automatically cut off the gas source.

Currently known civil gas safety devices for pipelines are generally composed of electronic components. Due to the large kitchen fume, the electronic components often fail due to corrosion, and need external power supply.

The purpose of this utility model is to provide a gas safety intelligent valve controlled by pipeline gas pressure. It can not only cut off the gas source automatically when the gas supply is interrupted or the rubber hose falls off or burns through, but also has no electronic components and does not need external power.

The purpose of this utility model is achieved in that a rubber diaphragm is installed between the valve body bottom cover and the valve body face cover to form an air chamber isolated from the outside world. The center of the rubber diaphragm is equipped with a moment arm bolt, which is set on the rear end of the moment arm installed in the air chamber. The front end of the moment arm is pressed on the piston rod. During normal use, the air chamber maintains normal pressure, and the rubber diaphragm bulges under pressure. , lift the rear end of the force arm with the force arm bolt, move the front end of the force arm down, push the piston, and keep the gas safety smart valve open. Once the gas supply is interrupted or the gas hose leading to the stove falls off and burns through, the gas flow will suddenly increase, the pressure in the gas chamber will drop suddenly, the rubber diaphragm will reset, the arm will relax, and the piston will be blocked by the force of the spring. Air inlet, cut off the air supply.

Due to the adoption of the above scheme, not only can the gas source be cut off quickly to prevent gas leakage, but also all moving parts are located inside the valve body, free from oil fume corrosion, sensitive and reliable, and because no external power is required, it can be used at any time without interruption. In automatic protection state.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Attached picture: Symmetrical cross-sectional structure diagram of gas safety intelligent valve.

In the figure: 1. Air intake joint 2. Piston spring 3. Piston 4. Arm bolt 5. Arm 6. Valve body bottom cover 7. Valve body cover 8. Opening handle 9. Handle nut 10. Rubber diaphragm 11. Gas Chamber 12, dual-purpose connector for air outlet.

In the figure, there is a ventilation partition in the channel of the intake joint (1), and vent holes are drilled around it, the piston (3) is placed in the channel of the intake joint, and one end is equipped with a piston spring (2) against the ventilation partition The other end is equipped with a sealing gasket to block the air inlet of the safety intelligent valve. The bolt of fixed piston packing is made piston push rod again, passes the front end of air inlet and withstands arm of force (5), and the rear end of arm of force is inserted in the annulus of arm of force bolt (4) bottom. A small hole is drilled in the middle part of the arm of force, which is inserted into the movable small shaft and fixed on the support frame. The arm bolt (4) is fixed on the rubber diaphragm (10), and stretches out the valve body cover (7), puts on the opening handle (8), and fixes it with the handle nut (9). The rubber diaphragm (10) is installed between the valve body bottom cover (6) and the valve body surface cover (7), and forms an air chamber (11) together with the valve body bottom cover, and an air outlet dual-purpose joint ( 12), so that the gas safety intelligent valve can be used as the first valve for pipeline gas to enter the home, connected with the gas meter, or installed at the gas meter outlet, and directly connected with the stove with a rubber hose. When in use, press the opening handle (8) to raise the force arm bolt (4), lift the rear end of the force arm (5), move the front end down, push the piston (3), and the gas enters the air chamber (11 ), the rubber diaphragm (10) bulges under the pressure of the gas, and drives the power arm (5) to press the plunger of the piston (3) to keep the piston in an open position. , When burning through, the air flow rate increases suddenly, the pressure of the air chamber drops suddenly, the swelling of the rubber diaphragm is eliminated, the force arm is relaxed, the piston spring pushes the piston to block the air inlet of the safety valve, and the air source is cut off. Since the release direction of the elastic force of the piston spring is consistent with the direction of gas flow, the piston is firmly blocked on the air inlet.

Claims (3)

1, a kind of gas safe smart valve that is applicable to the civil pipeline combustion gas, it is by air input joint (1), piston spring (2), piston (3), arm of force bolt (4), the arm of force (5), valve body bottom (6), valve body cover (7), open handle (8), handle nut (9), diaphragm of rubber (10), air chamber (11), the double-purpose joint (12) of giving vent to anger constitutes, it is characterized in that: piston (3) is placed in the passage of air input joint (1), one end is inserted in piston spring (2), the other end is equipped with sealing gasket, the bolt of fixing seal pad is made piston mandril again and is used, pass the front end that suction port withstands on the arm of force (5), be inserted in the garden ring of arm of force bolt (4) bottom the rear end of the arm of force (5), the arm of force is bolted to the center of diaphragm of rubber (10), and stretch out valve body cover (7), pack into and open handle (8), fixing with handle nut (9), diaphragm of rubber (10) is installed between valve body bottom (6) and the valve body cover (7), constitute air chamber (11) jointly with the valve body bottom, the double-purpose joint (12) of giving vent to anger is housed in the air outlet of air chamber.

2, according to the described gas safe smart valve of claim 1, it is characterized in that: a stifled ventilation dividing plate is arranged in the passage of air input joint (1), be drilled with vent around the dividing plate.

3, according to the described gas safe smart valve of claim 1, it is characterized in that: the middle part at the arm of force (5) is drilled with aperture, is inserted in movable little axle and is fixed on the inner supporting frame of valve body bottom (6).

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