CN201110408Y - Air stop self-closing valve - Google Patents

Abstract

The utility model relates to a gas-stop self-close valve, which comprises an axially mounted valve hole, a membrane, a magnet conduction piece, a ring-shaped magnet, a bar and a knob, wherein a boss position at one face of the membrane is butt-jointed with the valve hole and the other face is locked and joint with one end face of the bar, the other end of the bar is penetrated through the magnet conduction piece, the central hole of the ring-shaped magnet to connect the knob according to the utility model. The pressure in the valve cavity makes the membrane bulk for maintaining normal output of gas after the valve hole of the utility model is opened. When stopping gas suddenly, the gas tube pressure falls and leads the pressure born by the membrane is less than the suction between the ring-shaped magnet and the magnet conduction piece and makes the valve close automatically. The gas company needn't order workers to inform each user and can supply gas directly before restoring the gas supplication. Thereby the gas-stop valve is not only simple in structure, reliable and safe but also saves labor.

Description

Air stop self-closing valve

technical field

The utility model relates to a gas pipeline valve, in particular to a gas stop self-closing valve.

Background technique

With the widespread demand of residents for the use of gas, the laying of urban gas pipeline networks has become intricate. Natural disasters, human negligence or necessary pipeline network maintenance and other reasons may lead to interruption of pipeline gas supply. Because existing users use gas valves that only have the function of manually shutting off, usually before the normal gas supply is restored, the gas company must send enough staff to go door-to-door in the area to notify all valves to be closed. Like this, not only waste manpower, also can't restore gas supply in time, will inevitably affect the normal life of user; If individual user does not close the valve in time, safety accidents such as poisoning, explosion also easily take place after ventilating.

Utility model content

The purpose of this utility model is to provide a gas-stop self-closing valve that uses the air pressure in the valve body to maintain the normal output of gas and automatically closes when the gas is stopped.

In order to achieve the above purpose, the technical solution of the utility model is: a self-closing valve for stopping air, including a coaxially assembled valve port, a diaphragm, a magnetic guide sheet, a ring magnet, a pull rod and a handle; according to the utility model, The boss on one side of the diaphragm is docked with the valve port, and the other side is fastened to one end of the pull rod; the other end of the pull rod passes through the central hole of the magnetic guide sheet and the ring magnet and is connected to the handle.

Preferably, one side in the middle of the diaphragm is provided with a boss docked with the valve port, and the other side is provided with a raised buckle to buckle with one end surface of the pull rod;

Preferably, the magnet guide piece is fastened in the valve cover, and is between the diaphragm and the ring magnet, and can play a position-limiting role when the diaphragm and the valve port are opened;

Preferably, the ring-shaped magnet is fixedly sleeved on the pull rod, and moves up and down with the pull rod. Its magnetic force and the effect of attracting each other order the diaphragm to close the valve port.

Preferably, the aperture of the ring magnet is smaller than the aperture of the magnetic conductive sheet.

Preferably, the structure of the pull rod is in a stepped direction, one end surface of which is buckled with the diaphragm; and the stepped surface of the other end acts as a limiter with the magnetic conductive sheet; the diameter of the end surface in contact with the diaphragm is larger than that of the diaphragm. The diameter of the table.

The above-mentioned gas-stop self-closing valve mainly uses the air pressure in the valve chamber to inflate the diaphragm to maintain the normal output of gas after the valve port is opened. When the gas is suddenly stopped, the pressure of the gas pipeline will drop, causing the pressure on the diaphragm to be less than the suction force between the ring magnet and the magnetic guide, so that the valve will automatically close. Before the gas supply is resumed, the gas company can directly supply gas without sending people to the door-to-door notification. Such an air-stop self-closing valve is not only simple in structure, safe and reliable, but also saves manpower.

Description of drawings

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

Fig. 1 is the sectional schematic diagram of the self-closing valve of shutting off the gas of the present utility model;

Fig. 2 is a schematic cross-sectional view of the diaphragm of the self-closing valve of the utility model.

Detailed ways

In Figure 1, the arrows indicate the airflow direction: 1. Boss, 2. Valve port, 3. Pull rod, 4. Diaphragm, 5. Guide piece, 6. Ring magnet, 7. Handle, 8. Valve body , 9, bonnet, 10, valve cavity.

Its working process is: before use, because the ring magnet 6 is close to the magnetically conductive sheet 5, under the action of magnetic force, the pull rod 3 and the diaphragm boss 1 are forced to close the valve port 2 downward. At this time, there is no gas output.

When in use, the diaphragm 4 is pulled up by the handle 7 and the pull rod 3. As a result, the gas enters the valve cavity 10 through the valve port 2, causing the diaphragm 4 to bulge upward under pressure; The magnetic force between the two decreases and is smaller than the sum of the gas pressures on the diaphragm 4. At this time, the gas is output stably through the gas outlet.

During use, if the pipeline gas supply is suddenly interrupted due to various reasons, the pressure of the valve chamber 10 including the diaphragm 4 will decrease as a result; , the ring magnet 6 forces the pull rod 3 and the diaphragm 4 to move downward until the central boss 1 of the diaphragm 4 closes the valve port 2 . When the pipeline supplies gas again, because the pressure area in the central boss 1 of the diaphragm 4 is small, and the magnetic force of the ring magnet 6 on the magnetic guide sheet 5 is close to the final suction force at this time, so no gas will flow out from the valve port 2.

Claims (5)

1. Self closing valve of stopping the supple of gas or steam comprises valve body, valve gap, diaphragm, ring magnet and magnetic conducting plate:

It is characterized in that: the one side in the middle of the diaphragm is provided with the boss that docks with valve port, and another side is established an end face snapping of a projection button limit and pull bar; The other end of pull bar is connected with handgrip after passing the center hole of magnetic conducting plate, ring magnet.

2. the Self closing valve of stopping the supple of gas or steam according to claim 1 is characterized in that: magnetic conducting plate is fastened in the valve gap, is between diaphragm and the ring magnet.

3. the Self closing valve of stopping the supple of gas or steam according to claim 1 is characterized in that: the ring magnet fixed cover moves up and down with pull bar on pull bar.

4. according to claim 1 or the 3 described Self closing valves of stopping the supple of gas or steam, it is characterized in that: the aperture of ring magnet is less than the aperture of magnetic conducting plate.

5. the Self closing valve of stopping the supple of gas or steam according to claim 1 is characterized in that: the structure of pull bar is the stepped shaft trend, and the diameter of the end face that it contacts with diaphragm is greater than the diameter of diaphragm boss.

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