JPS5916149B2 - Seismic valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve device that closes a valve in response to vibrations such as an earthquake.

Conventionally, various valve devices have been proposed that perform vibration-sensitive operation to cut off the supply of fuel to combustion equipment in order to prevent the spread of disasters in the event of an earthquake disaster, etc. Since the means for resetting the vibration sensing mechanism is complicated, it has not been satisfactory.

The inventor has already arranged cylindrical magnets in the shape of a rope, with the upper and lower end edges protruding inward, and has housed a magnetic sphere inside the cylindrical magnet constructed in this way, and has made the magnetic sphere bear its own weight. and the magnetic force at the upper and lower ends of the cylindrical magnet, and a valve seat is formed at the upper end opening of the cylindrical magnet to make the magnetic sphere act as a ball valve, thereby reducing vibration. It was discovered that the magnetic force of the magnetic sphere becomes unbalanced due to such factors, and the magnetic force at the upper end of the cylindrical magnet acts strongly, attracting the magnetic sphere to the valve seat and easily closing the valve. Special application 1978-”78
A patent application was filed as No. 844.

Further, in the above invention, a needle valve is disposed above the valve seat of the magnetic sphere, and the magnetic sphere which has closed the valve can be reset by the pressing action of the tip of the valve body, but in this case, If the main valve of the ignition part was left open, fluid would be released directly, which was extremely dangerous.

Therefore, as a result of further research and improvement, the inventor found that
When resetting a ball valve that acts as a seismic valve, the ball valve must be configured so that it cannot be reset unless a separate cock is closed. Immediately after resetting the ball valve, make sure that fluid does not leak. I discovered something that could be prevented.

That is, in the present invention, a magnetic sphere is housed inside a cylindrical magnet, and a three-way switching cock is provided adjacent to the seismic valve that causes the magnetic sphere to act as a ball valve, and one of the cocks is connected to the seismic valve. The ball valve is set so that the ball valve cannot be reset when the cock bundle is operated so that the flow path communicates with the inside of the ball valve to discharge fluid, and the ball valve is set so as to communicate with the other flow path of the cock. The configuration is such that the ball valve can be reset when the cock bundle is operated, and in this case, if the flow path on the outlet side of the ball valve is open, fluid pressure acts on the ball valve and the ball is reset. It has been found that by configuring the seismic valve so that it cannot be reset by causing the valve to close, it is possible to obtain a seismic valve device that can achieve even safer operation.

SUMMARY OF THE INVENTION Accordingly, it is a general object of the present invention to provide a seismic valve device with a safe and reliable reset operation.

The main object of the present invention is to house a magnetic sphere inside a cylindrical magnet with a fluid passage in its circumferential surface, and to provide a through hole in the lower side of the cylindrical magnet to hold the magnetic sphere under a balance of magnetic force. A holding member is provided, and a valve seat portion is provided that attracts and holds a magnetic sphere in the upper end opening of the cylindrical magnet to close the valve, and a reset rod of the magnetic sphere is disposed above the cylindrical magnet. A manual switching valve that selectively communicates with the fluid passage provided in the cylindrical magnet or the passage hole provided in the holding member of the magnetic sphere is provided, and when this manual switching valve is communicated with the passage hole of the holding member, It is an object of the present invention to provide a seismic valve device which is characterized in that it enables the operation of a reset rod and is configured so that fluid pressure acts directly or indirectly on a magnetic sphere.

Further, in the above-mentioned seismic valve device, a solenoid having a movable core is arranged adjacently, and the movable core is configured to directly or indirectly suppress the magnetic sphere, so that the solenoid can be energized as appropriate. It has been found that it is possible to perform a valve closing operation of a seismic valve device, and that it is extremely effective when combined with, for example, a gas leak detector.

Therefore, another object of the present invention is to provide the above-mentioned seismic valve device, in which a solenoid is disposed below the through hole provided in the holding member of the magnetic sphere, and a movable iron core provided in the solenoid is connected directly or indirectly to the magnetic sphere. An object of the present invention is to provide a seismic valve device characterized in that it is configured to act on a seismic valve device.

Next, embodiments of the seismic valve device according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a typical example of a valve device according to the present invention, and reference numeral 10 indicates a valve casing, and inside this valve casing 10 there are a seismic valve section 12 and a manual switching valve section 14. It is attached to the main building.

The vibration-sensing valve section 12 houses a magnetic sphere 18 inside a cylindrical magnet 16 arranged like a rope, and a magnetic or non-magnetic body supporting the magnetic sphere 18 is placed on the lower side of the cylindrical magnet 16. A holding member 20 is provided.

A fluid passage hole 22 is formed in the outer circumference of the cylindrical magnet 16, and a relatively small diameter passage hole 24 is formed in the center of the holding member 20.

On the other hand, the upper inner peripheral edge 16a of the cylindrical magnet 16 is slightly protruded inward so that the magnetic sphere 18 can easily float to the upper end, and the floating magnetic sphere 18 is attracted and held on the inner peripheral edge 16a. It constitutes a valve seat portion that performs a valve-closing action.

A reset rod 26 that vertically moves up and down is provided above the cylindrical magnet 16 configured as described above, and the lower end of the reset rod 26 comes into contact with the magnetic sphere 18 to forcefully press it downward. The upper end of the reset rod 26 protrudes outside the valve casing 10, and
A coil spring 28 is attached to elastically hold the reset rod 26, and its outer part is covered with a flexible covering member 30.

The manual switching valve section 14 includes a conical grab 32 and a bundle 34.
The seismic valve portion 12 is disposed in front of the seismic valve portion 12 with respect to the fluid inlet hole 36.

The conical plug 32 is provided with bidirectional switching holes 38 and 40, and one of the holes 38 is connected to the fluid hole 22 of the seismic valve part 12 through a hole 42 formed in the valve casing 10. The passage hole 40 communicates with the passage hole 24 of the vibration-sensing valve section 12 via another passage hole 44 bored in the valve casing 10 to constitute a sub-flow passage.

In this case, the bundle 34 of the manual switching valve section 14 is formed into a disk shape and arranged so as to hide the upper end surface of the reset rod 26 of the seismic valve section 12, and a notch 46 is provided at one end of the bundle 34. The notch 46 of the bundle 34 is configured to coincide with the upper end surface of the reset rod 26 when the main flow path is closed and the sub flow path is open.
(see Figures and Figure 3).

Therefore, the configuration is such that the reset lever 26 cannot be operated when the main flow path is opened (see FIGS. 4 and 5).

In the seismic valve device according to the present invention configured as described above, by opening the main flow path with the magnetic sphere 18 reset, the fluid flows from the inlet hole 36 to the outlet hole 48, thereby preventing abnormal vibrations caused by an earthquake or the like. If this occurs, the magnetic force on the magnetic sphere 18 becomes unbalanced, and the magnetic force at the upper end of the cylindrical magnet 16 acts strongly, causing the magnetic sphere 18 to stick to the valve seat and automatically close the valve. It will be done.

Next, in the device of the present invention, the magnetic sphere 1 that has undergone the valve closing operation is
8, when the main flow path is open, the reset rod 26 is moved from the position of the bundle 34 described above.
operation is impossible.

Therefore, it is possible to prevent fluid from being discharged into the outlet hole 48, which occurs when the seismic valve section 12 is reset when the main flow path is opened.

Therefore, in the device of the present invention, the magnetic spheres 18 can be reset when the bundle 34 is rotated to close the main channel and open the sub channel.

In this case, a diaphragm 50 is interposed below the through hole 24 formed in the center of the holding member 20 that supports the magnetic sphere 18, and a projection on one side of the diaphragm 50 that can come into contact with the reset magnetic sphere 18 A section 52 is provided.

With this configuration, when the bundle 34 is set in the position shown in FIG. 2, the main flow path is closed and the sub flow path is opened.

In this state, the magnetic sphere 18 can be reset.

Therefore, by first pushing down the reset rod 26 with one finger and then rotating the bundle 34 with the other hand to the position shown in FIG. 4, the main flow path is opened.

At this time, fluid at a predetermined pressure flows into the outlet hole 48 side through the main channel, but if the passage communicating with the outlet hole 48 side is in a leak-free state, the bundle is placed in the position shown in FIG. Even if you release your finger from the reset rod 26 after returning it (in this case, it is preferable to wait for confirmation for 2 to 3 seconds), no pressure difference will occur between the main channel side and the sub-channel side, so the magnetic Sphere 1
A reset of 8 will be achieved.

Therefore, in this case, only the l.ndle 14 is moved to the fourth
If set to the state shown in the figure, the operation as a seismic valve device can be resumed.

However, if the passage communicating with the outlet hole 48 side is in an open state, such as immediately after the vibration-sensing valve device has performed a vibration-sensing operation, the reset lever 26 must be kept pressed down as described above. 34 to the position shown in FIG. 4, and then return the bundle 34 to the position shown in FIG. 2 and release the reset lever 26, a pressure difference is generated between the main flow path side and the sub flow path side. The diaphragm 50 is pushed up and the valve is immediately closed, thereby achieving safe operation of this type of valve device.

Therefore, in such a case, the magnetic sphere 18 can be reset by confirming that the passage communicating with the outlet hole 48 is blocked and then repeating the above-mentioned reset operation several times.

In addition, if the magnetic sphere 18 cannot be reset, it is considered that a part of the passage is damaged, and in this case, it is necessary to immediately re-inspect the passage.

Furthermore, in this embodiment, even if the diaphragm 50 is omitted and the fluid pressure on the sub-flow path side is configured to act directly on the magnetic sphere 18, the same effect as described above can be obtained.

As described above, according to the device of the present invention, the seismic valve section is reset in a state where the main flow path of the fluid is completely blocked, so that safe and reliable operation can be achieved at the time of resetting.

Further, as shown in FIG. 6, a solenoid 54 is disposed below a diaphragm 50 provided in the sub-flow path, and the tip of a movable iron core 56 of the solenoid 54 is disposed close to the bottom surface of the diaphragm. , various detectors (gas leak detector,
Solenoid 52 is energized in conjunction with the fire detector, etc.).
By configuring the valve to be I-legged, it is possible to forcibly close the valve by the magnetic sphere 18 while fluid is being transferred through the main flow path even in the event of an abnormality other than vibration.

With this configuration, it is possible to achieve safe operation over a wide range of the valve device according to the present invention.

According to the earthquake-sensing valve device of the present invention, the magnetic sphere is balanced in an unstable state by using its own weight and external magnetic force (thereby, the valve closing operation can be performed reliably when sensing a vibration). Moreover, by providing a manual switching valve section adjacent to the seismic valve section, it is possible to achieve safe and reliable valve action by preventing dangers such as the release of fluid when the seismic valve section is reset. I can do it.

Therefore, the valve device according to the present invention is extremely effective when used as a safety valve attached to a combustion gas or liquid transfer pipe.

Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing one embodiment of the seismic valve device according to the present invention, Fig. 2 is a plan view of Fig. 1 showing a state in which the manual switching valve portion is communicated with the sub-flow path side, and Fig. The figure is a cross-sectional view of the main part of the manual switching valve section in FIG. 2, and FIG. 4 is a plan view similar to FIG.
This figure is a sectional view of the main part of the manual switching valve section in FIG. 4, and FIG. 6 is a sectional view of the main part showing another embodiment of the seismic valve device according to the present invention. 10... Valve casing, 12... Seismic valve section, 14... Manual switching valve section, 16...
・Cylindrical magnet, 18...Magnetic sphere, 20...
... Holding member, 22-0. ...Fluid hole, 24...
...Through hole, 26...Reset rod, 28...
... Coil spring, 30 ... Flexible covering member, 32 ... Conical plug, 34 ... Bundle, 36 ... Fluid inlet hole , 38, 40...
...Switching hole, 42゜44...Through hole, 46
... Notch, 48 ... Fluid outlet hole, 50
... diaphragm, 52 ... protrusion,
54...Solenoid, 56...Movable iron core.

Claims (1)

[Scope of Claims] 1. A magnetic sphere is housed inside a cylindrical magnet with a fluid hole bored in the curved part, and a through hole is provided on the lower side of the cylindrical magnet to hold the magnetic sphere under the balance of magnetic force. A holding member is provided, and a valve seat portion is provided that attracts and holds a magnetic sphere in the upper end opening of the cylindrical magnet to close the valve, and a reset rod of the magnetic sphere is disposed above the cylindrical magnet. A manual switching valve that selectively communicates with a fluid passage provided in the cylindrical magnet or a passage provided in a magnetic holding member is provided, and the manual switching valve is reset when the manual switching valve is communicated with the passage hole of the holding member. A seismic valve device that enables the operation of a rod and is configured such that potash fluid pressure acts directly or indirectly on a magnetic sphere. 2. In the seismic valve device according to claim 1,
A seismic valve device characterized in that a solenoid is disposed below a through hole provided in a holding member for a magnetic sphere, and a movable iron provided in the solenoid is configured to act directly or indirectly on the magnetic sphere.