JPS6132539B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is provided in a flow path system for gas, etc., to quickly respond to a disaster such as an earthquake and close the valve. This invention relates to a safety valve device that operates safely so as not to be reset in the event of gas leakage or the like.

Various safety valves have been proposed in the past for gas supply piping, etc. to prevent leakage of raw gas and the occurrence of secondary disasters due to earthquakes, etc., but all of them have complicated mechanisms and are expensive. , nothing was satisfying.

The inventor has already housed a magnetic sphere inside a cylindrical magnet, provided a holding member at the bottom of the cylindrical magnet to hold the magnetic sphere in a balance between its own weight and magnetic force, and installed a holding member at the top of the cylindrical magnet. We have developed a vibration-sensing element that is provided with a suction plate and configured so that when the magnetic sphere swings, the magnetic sphere is displaced on the holding member, loses its magnetic balance, dislocates, and is held by the suction. Next, by applying this vibration-sensing element and configuring the magnetic sphere of the vibration-sensing element to act as a valve element or to engage with the valve element to perform a valve operation, a valve closing operation is automatically performed when an earthquake is sensed. We have developed a seismic valve device that can

Further, by applying the above-mentioned vibration sensing element, a valve body is provided which engages the lower end of the valve stem on the magnetic sphere and opens and closes the flow path on a part of the valve stem, so that the magnetic sphere can be closed. The valve is configured to seat the valve body on the valve seat and close the valve by upward displacement, and a fluid chamber is provided by disposing a diaphragm that is displaced by changes in fluid pressure below the holding member. The compartment is configured to communicate with the discharge side passage of the valve, communicate the other compartment with the atmosphere, and further transmit the displacement of the diaphragm directly or indirectly to the magnetic sphere to forcibly close the valve. For example, if the discharge side passage is open when resetting the magnetic sphere after a valve closing operation, the magnetic sphere will not be reset under the action of the fluid chamber provided with the diaphragm, thereby preventing leakage of raw gas, etc. We also succeeded in developing a valve device that operates safely.

However, the previously proposed safety valve device
Although it is extremely superior in terms of operating characteristics, it has drawbacks such as a complicated structure, an increased size of the device, and increased manufacturing costs.

Therefore, as a result of various studies, the inventor improved the configuration of the valve body operated by magnetic spheres, and added a mechanism to the valve body to detect the fluid pressure difference between the fluid supply side piping and the fluid discharge side piping. It has been found that by incorporating the safety valve device, the overall structure can be made compact, manufacturing can be simplified, costs can be reduced, and a highly reliable safety valve device can be obtained.

That is, a valve body equipped with a piston part that opens and closes a flow path is arranged above the magnetic sphere so as to be movable up and down, and a hollow chamber is provided in the piston part, and the fluid pressure supplied to the inside of the valve is controlled in this chamber. arranging a diaphragm that is displaced by change to define the hollow chamber into two chambers;
A magnet is provided on the diaphragm, a magnetic rod member is provided at the lower end of the valve body that approaches or moves away from the magnetic sphere in response to the displacement of the diaphragm, and a magnetic rod member is provided on the valve body for resetting the magnetic sphere from outside the valve. By engaging the reset operation lever, it is possible to push up the valve body by the seismic action of the magnetic sphere and reliably close the flow path.

Further, one hollow chamber partitioned by a diaphragm in the piston portion provided in the valve body is configured to communicate with the fluid passage when the reset operation rod is operated, and the other hollow chamber partitioned by the diaphragm is always used as a fluid passage. By configuring it to communicate with the valve downstream of the seismic operation,
For example, it has been found that the function as a safety valve device can be sufficiently enhanced by making it impossible to perform a reset operation when raw gas or the like flows out due to opening of a terminal device.

Therefore, an object of the present invention is to have a simple structure and reliable operation, to quickly close the valve by vibration-sensing operation, and to ensure safe operation against opening of the downstream side of the valve during reset operation. It is possible to provide a safety valve device.

In order to achieve the above object, in the present invention, a magnetic sphere is housed inside a cylindrical magnet, and a holding member is provided inside the cylindrical magnet to hold the magnetic sphere in a balance between its own weight and magnetic force. A valve body having a spherical upper piston portion is disposed so as to be movable up and down, a hollow chamber is provided in the piston portion, a diaphragm is disposed in this chamber to be displaced by a change in fluid pressure, and a magnet is provided in the diaphragm, A magnetic rod member that approaches or moves away from the magnetic sphere at the lower end of the valve body in response to the displacement of the diaphragm is provided, and a reset operation rod is provided that resets the magnetic sphere via the valve body,
One end of the reset operating rod is elastically and freely engaged with the central portion of the valve body, so that when the reset operating lever is operated, one chamber partitioned by a diaphragm in the piston part communicates with the fluid passage. The other chamber, which is configured and partitioned by a diaphragm, is configured to constantly communicate with the fluid passage.

In the above-mentioned safety valve device, a hollow cylindrical portion is provided protruding from the lower end of the piston of the valve body, and a magnetic rod member that moves up and down in a predetermined free space is disposed inside the cylindrical portion, and when the diaphragm is displaced, the attractive force of the magnet is By configuring the magnetic rod member to drop to a predetermined position and approach the magnetic sphere, the function of the safety valve operation can be sufficiently enhanced, which is preferable.

In addition, one end of the reset operating rod is elastically and freely engaged with the central portion of the valve body, so that when the reset operating rod is operated, one chamber partitioned by a diaphragm in the piston portion communicates with the fluid passage. If the other chamber, which is partitioned by a diaphragm, is configured to communicate with the fluid passage at all times, it will be possible to ensure safety by making it impossible to reset the valve when opening the downstream side of the valve after the valve has closed due to an earthquake-sensing operation. This makes it possible to further improve sexual performance.

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

In FIG. 1, reference numeral 10 indicates a casing, and a valve operating section 1 is provided inside this valve casing 10.
2 and a valve mechanism section 14 are provided.

The valve operation unit 12 is provided in the bottom of the valve casing 10 and includes a cylindrical magnet 16 arranged vertically and a magnetic sphere 18 housed inside the cylindrical magnet 16.
and a holding member 20 made of a non-magnetic material that supports the magnetic sphere 18, and the magnetic sphere 18 is held on the holding member 20 by the balance between its own weight and magnetic force. Therefore, when the magnetic sphere 18 receives external vibration, it swings on the holding member 20, and as a result, the magnetic force acting on the magnetic body 18 from the upper end of the cylindrical magnet 16 becomes stronger.
The magnetic sphere 18 moves upward and becomes stable.
Note that a magnetic sphere 18 is placed on the top of the cylindrical magnet 16.
A suction plate 22 made of a magnetic material is arranged to strongly lock the holder in a predetermined position.

The valve mechanism section 14 includes a valve body 26 that extends upward from the bottom cylindrical section 10a of the casing 10 that houses the valve operating section 12, and has a piston section 24 that is slidably disposed within the cylindrical section 10a. This valve body 26
and a valve seat 28 provided within the valve casing 10 on which the valve seat 28 is seated. That is, the valve body 26 is
It has a valve part 30 made of a flexible elastic member such as rubber, and one end of a reset operating rod 34 is inserted and locked into the center of the valve part 30 through a support member 32 in a resilient and freely movable manner. . Further, a piston part 24 having a hollow chamber 36 is provided in the lower part of the valve part 30, and a diaphragm 38 that is displaced by the differential pressure of the fluid is disposed in the hollow chamber 36, and the center of the diaphragm 38 is A magnet 40 is attached to the piston part 2, and a magnet 40 is attached to the piston part 2.
A rod member made of a magnetic material is provided with a hollow cylindrical part 42 extending downward at the center of the bottom surface of 4, and within this cylindrical part 42 moves upward or downward in a predetermined free space according to the approach or separation of the magnet 40. 44 is stored. It is preferable that the reset operating rod 34 is separated from the operating section and the operating section to be inserted into the support member 32 and separated from the operating section, thereby reducing the load when the valve body 26 moves upward.

With this configuration, the valve mechanism section 14 is arranged so that, when the reset is completed, the lower end surface of the hollow cylinder section 42 protruding from the bottom of the piston section 24 is placed close to the magnetic sphere 18 without contacting it, and the casing 10
A through hole 46 is bored in a part of the cylindrical part 10a of the piston part 24 to introduce the fluid from the fluid supply side pipe into the space formed below the bottom surface of the piston part 24. Through hole 4 in the bottom wall
8 is bored so that a part of the fluid introduced into the space can be introduced into one of the compartments partitioned by a diaphragm 38 in the hollow chamber 36. In addition, the valve part 30
When inserting and locking the reset operation rod 34 through the support member 32, the support member 32 is provided with a floating hole 50 through which the reset operation rod 34 can be freely inserted. A protrusion 54 is provided with a coil spring 52 housed therein, and one end of the coil spring 52 is formed as a part of the reset operation rod 34.
Further, a flange 56 is formed at the lower end of the reset operating rod 34 to be engaged with the bottom surface of the support member 32, and the reset operating rod 34 can be moved up and down with respect to the supporting member 32 under the elastic action of the coil spring 52. When the support member 32 swings slightly, fluid is introduced into the other compartment partitioned by a diaphragm 38 formed at the lower part of the support member 32 through the floating hole 50 of the support member 32. (See Figure 2).

The above-mentioned reset operating rod 34 has its upper end held by a sleeve 58, and this sleeve 58 is elastically inserted into a sealed storage body 60 projecting outward from the top of the valve casing 10 via a coil spring 62. A part of the hermetically sealed storage body 60 is connected to an operating section 60 made of a flexible member.
By pushing down the operating portion 60a with a finger or the like, the sleeve 58 moves downward against the elasticity of the coil spring 62, and the reset operating rod 34 is simultaneously moved downward.

Next, the operation of the safety valve device according to the present invention configured as described above will be explained.

First, when the safety valve device is in the reset state, the magnetic sphere 18 of the valve operating section 12 is stably placed on the holding member 20, as shown in FIG. 28 and provided in the valve casing 10.
and the fluid discharge port 66 are in communication with each other. Next, when an earthquake or the like occurs, the magnetic sphere 18 of the valve operating section 12 moves upward due to the seismic action, and as the magnetic sphere 18 moves upward, the valve body 26 is pushed up and the valve seat 2
8 and the fluid supply port 64 of the valve casing 10
The passage of the fluid discharge port 66 is blocked by the valve body 26 (see FIG. 2). In this case, the valve body 26
At the same time, the reset operating rod 34 also moves upward, so the upper end of the reset operating lever 34 is configured to be able to freely move enough to allow the upward movement within the sleeve 58 that holds it. It would be convenient in actual handling if the safety valve device according to the present invention is constructed so that it can be confirmed from the outside that the safety valve device according to the present invention has operated in response to vibrations by utilizing the free movement of the reset operating rod 34 within the sleeve 58.

As shown in FIG. 2, in order to reset the valve body 26 after the valve body 26 undergoes a seismic action and the passage is shut off, the reset operating rod 34 is first moved downward. In this case, the lower end of the reset operating rod 34 is moved against the support member 32 against the valve body 26 under the action of the coil spring 52.
During this period, the valve body 2 moves freely in the floating hole 50.
6 and the fluid discharge port 66
The internal fluid is maintained at equal pressure by communicating with both sides. In this case, the hollow chamber 3 provided inside the valve body 26
A diaphragm 38 is provided inside the diaphragm 6 , and the upper space partitioned by the diaphragm 38 communicates with the fluid outlet 66 , and the lower space communicates with the fluid supply port 64 .
For example, when the piping system on the fluid discharge port 66 side is exposed to the atmosphere, a pressure difference occurs in the hollow chamber 36 when the reset operation rod 34 moves downward, and the diaphragm 38 moves upward. deviate. As a result, the magnet 40 attached to the diaphragm 38
Since the rod member 44 in 3 is considerably separated from the rod member 4
4 moves downward as the attraction force by the magnet 40 is lost, so the valve body 26 moves downward under the operation of the reset operation rod 34, and the magnetic sphere 18 located above at the tip of the hollow cylinder part 42 is moved downward into the cylinder. Holding member upper 2 inside magnet 16
Even if the magnetic sphere 18 is placed at the top of the magnetic sphere 18, since the bar member 44 made of magnetic material is close to the top, the magnetic force distribution within the cylindrical magnet 16 is concentrated on the upper part of the magnetic sphere 18, and therefore the reset is difficult. Even if the pressing operation of the operating rod 34 is released, the magnetic sphere 18 moves upward and pushes up the valve body 26, and the valve body 26 is seated on the valve seat 28 to close the valve and prevent fluid leakage.

However, if the piping system on the fluid discharge port 66 side is blocked after the valve operating section 12 performs an earthquake-sensing operation and closes the valve, the hollow part of the valve body 26 may be closed when the reset operating rod 34 is moved downward. The diaphragm 38 is deviated upward due to the pressure difference in the chamber 36, but due to the downward movement of the valve body 26, the fluid from the fluid supply port 64 side flows into the fluid discharge port 66 side, and the inside of the valve casing 10 is supplied with a predetermined fluid. Since the pressure is maintained, the inside of the hollow chamber 36 becomes equal pressure, and the diaphragm 38 returns to its original position.As a result, the rod member 44 is attracted upward by the magnet 40, so that the magnetic sphere 18 is shaped into a cylindrical shape. If the pressing operation of the reset operation rod 34 is released while the magnetic sphere 18 is placed on the holding member 20 inside the magnet 16, the magnetic sphere 18 is held on the holding member 20 as it is, and the valve body 26 is reset to the open state. (See Figure 1).

The safety valve device according to the present invention is capable of quickly and reliably automatically closing the valve in the event of a disaster such as an earthquake by the seismic operation of the magnetic sphere that constitutes the valve operating section 12, and is capable of automatically closing the valve quickly and reliably in the event of a disaster such as an earthquake. During operation, it has a safety design that prevents it from being reset if the fluid outlet side is open, so it has excellent safety and reliability that can prevent secondary disasters due to fluid leakage, etc. It is.

Therefore, the safety valve device according to the present invention can be suitably applied as a safety valve device installed in a combustion gas fluid supply pipe for general household use and industrial use.

Further, the safety valve device according to the present invention has a simple structure and can be constructed to have approximately the same external dimensions as a conventional valve structure, so it has many excellent advantages such as easy manufacture and handling.

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 the drawing]

FIG. 1 is a sectional view showing an embodiment of a safety valve device according to the present invention, and FIG. 2 is an enlarged sectional view of a main part showing the operating state of the safety valve device shown in FIG. 10... Valve casing, 12... Valve operating section, 1
4... Valve mechanism section, 16... Cylindrical magnet, 18... Magnetic sphere, 20... Holding member, 22... Adsorption plate, 2
4...Piston part, 26...Valve body, 28...Valve seat, 30...Valve part, 32...Support member, 34...
Reset operation rod, 36...Hollow chamber, 38...Diaphragm, 40...Magnet, 42...Hollow cylindrical portion, 44...
Rod member, 46... through hole, 48... through hole, 50...
Floating hole, 52...Coil spring, 54...Protrusion, 5
6...Flange, 58...Sleeve, 60...Hermetically sealed storage body, 62...Coil spring, 64...Fluid supply port, 66...Fluid discharge port.

Claims (1)

[Claims] 1. A magnetic sphere is housed inside a cylindrical magnet, a holding member is provided inside the cylindrical magnet to hold the magnetic sphere in a balance between its own weight and magnetic force, and a holding member is provided on the top of the magnetic sphere. A valve body including a piston portion is arranged to be movable up and down, a hollow chamber is provided in the piston portion, a diaphragm is disposed in this chamber which is displaced by a change in fluid pressure, a magnet is provided in this diaphragm, and a magnet is provided in the diaphragm. A magnetic rod member that approaches or moves away from the magnetic sphere at the lower end of the valve body in response to displacement is provided, and an operating rod is provided that resets the magnetic sphere via the valve body, and one end of the reset operation rod is connected to the valve body. elastically and freely engaged with the central part of the piston so that one chamber partitioned by a diaphragm in the piston part communicates with the fluid passage when the reset operation rod is operated, and the other chamber partitioned by a diaphragm. A safety valve device characterized in that it is configured to be in constant communication with a fluid passage, and a magnetic sphere moves upward due to vibration to push up a valve body and close a flow passage. 2. A hollow cylindrical portion is provided protruding from the lower end of the piston of the valve body, and a magnetic rod member that moves up and down in a predetermined free space is disposed inside this cylindrical portion, and when the diaphragm is displaced, the attraction force of the magnet is lost and the magnetic A safety device according to claim 1, wherein the rod member is configured to fall to a predetermined position and come close to the magnetic sphere.