JP2002005322A - Multifunctional emergency shutoff safety valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety valve that is arranged in a gas supply line and can shut off a gas flow passage, interrupt gas supply and prevent an accident such as a gas explosion and a fire when an earthquake of a fixed magnitude occurs and when a burst of a line part downstream of the valve results in a large leakage of gas. SOLUTION: A valve outlet is kept open while a permanent magnet 504 mounted in the upper end of a spool assembly 500 vertically disposed in a valve chest 101 in a valve body so as to open and close the outlet is suspended at a fixed interval from the bottom of an earthquake sensing weight 402. When a vibration of a fixed magnitude or over is transmitted to the safety valve, the earthquake sensing weight 402 is rocked to increase the distance to the spool assembly 500 suspended from the earthquake sensing weight bottom, and the spool assembly 500 falls onto a ball valve 900 to close the gas outlet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an outlet fluid pressure due to a large amount of fluid leakage (Excess Flow) due to an earthquake of a certain size or more detected by the Richter scale and a rupture of a pipe at a rear end portion of the outlet of a valve. When the pressure of the fluid suddenly drops due to a malfunction such as a failure of a pressure regulator such as a governor that constantly maintains the pressure of the fluid in the front end pipe line of the valve at a constant pressure, The present invention relates to a multi-function emergency shutoff safety valve for preventing an accident such as an explosion or a fire caused by gas leakage by reacting sensitively and closing a flow passage.

[0002]

2. Description of the Related Art It is desirable that a multi-function emergency shutoff safety valve does not require electric energy. That is, it is desirable that the electronic component such as an electronic sensor or an electronic valve for sensing an actual earthquake or for sensing a fluid pressure is not used at all and a power supply is not required.
This is to prevent the valve from becoming inoperable when a power failure occurs due to an earthquake or the like.

[0003] In countries where earthquakes frequently occur, general structures including electric supply lines, gas supply lines, water pipes, and buildings are basically constructed by seismic design.
When a strong seismic intensity occurs, the destruction of infrastructure facilities cannot be fundamentally prevented.

[0004] Damage caused by an accident such as a gas pipeline rupture accident caused by a natural disaster such as an earthquake or other underground excavation work as described above, that is, secondary damage such as a large gas leak accident. Pressure sensing devices and seismic sensing devices have been used to minimize energy. Most of such devices use sensing sensors that use electrical energy and also include electrical circuit board configurations and mechanical devices. For this reason, these devices are very complicated in structure, cause a very high failure rate, are liable to become inoperable due to a power outage or the like, and increase production costs.

[0005] In particular, when an earthquake having a strong seismic intensity occurs, a power failure accident often occurs, and it is not desirable to use a valve using electric energy.

[0006] Conventionally, there have been known many seismic sensing devices having a structure which detects an earthquake of a certain scale or more and shuts off the flow of a fluid such as a gas when the earthquake occurs.

The construction and operation of US Pat. No. 5,307,699 (an earthquake sensing device for shut-off valves and similar products in the event of an earthquake) among these conventional earthquake sensing devices will be described.

The valve described in the above-mentioned US Pat. No. 5,307,699 is provided above a flow path of a fluid such as gas, and comprises a seismic sensing weight made of a metal lump, a housing accommodating the seismic sensing weight, A valve seat disposed on the lower surface side of the housing to block a fluid flow path. An insertion hole is formed in the earthquake sensing weight, and a ferromagnetic pin is inserted into the insertion hole. The seismic sensing weight is locked by a washer to a substantially middle portion of the ferromagnetic pin so as to separate a certain clearance from the outer peripheral portion of the ferromagnetic pin. The ferromagnetic pin to which the earthquake sensing weight is locked has a tapered collar formed at the lower part. The ferromagnetic pin is housed in a housing recess formed in the bottom surface of the housing such that the collar and the wall surface of the housing recess are separated by a certain clearance.

A valve seat provided on the lower surface side of the housing in which the ferromagnetic pins are housed, and shuts off a fluid flow path,
It is held at the tip of an arm supported by a support shaft provided near the lower surface of the housing, and is formed to be rotatable in the direction in which the fluid flow path is shut off. The arm that holds the valve seat has a permanent magnet built in at a position corresponding to the lower side of the storage recess formed on the bottom surface of the housing. Therefore, the arm
The magnetic force of the permanent magnet attracts the ferromagnetic pins housed in the housing recesses and is held above the flow path. This allows
The valve seat held at the tip of the arm is also held above the flow path.

[0010] US Pat.
No. 7,699 will be described.

The ferromagnetic pin is maintained in a vertical state by a magnetic force of a permanent magnet built in an arm attached to the valve seat. Therefore, the valve seat opens the gas outlet when the arm is attached to the lower plate of the housing.

When the seismic sensing weight swings due to an earthquake or the like, the ferromagnetic pin and the collar swing in the storage recess, so that the arm rotates in the direction in which the flow path is shut off by the weight of the valve seat. As a result, the valve seat blocks the flow path, and an accident such as gas leakage can be prevented.

[0013]

The U.S. patent having the above-described structure, operation and effect has many problems.

That is, in the above-mentioned earthquake sensing device,
Since the locking state of the weight into which the ferromagnetic pin is inserted is always fixed at a fixed position, it is impossible to adjust the intensity of the seismic intensity using the weight. Further, in this earthquake sensing device, since the space is formed between the ferromagnetic pin and the weight, the weight of the weight is biased, and there is a problem in maintaining the ferromagnetic pin in a vertical state. Furthermore, since the arm to which the valve seat is attached rotates by the state supported by the spindle, the earthquake sensing device operates smoothly when the arm and the spindle are corroded or a foreign substance is fitted. There is a problem that can not be done.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the conventional invention, the present invention is directed to a safety valve in which electric energy is completely eliminated, in which a spool assembly disposed in a valve body is suspended. In the attached state, the outlet of the fluid such as gas is opened, and when vibration of a certain seismic intensity or more is transmitted to the seismic weight during the occurrence of an earthquake, the spool assembly that was suspended by magnetic force It is configured to close the fluid outlet while being dropped thereon.

At this time, the magnetic force of the permanent magnet and the weight and separation distance of the spool assembly play a very important role in the flow rate passing through the valve and the seismic intensity response sensitivity of the earthquake. In the distance, a part processing tolerance and an assembly tolerance, and a permissible error range of the magnetic force tolerance of the permanent magnet may occur.

An object of the present invention is to solve the above-mentioned problems and to make it possible to arbitrarily adjust and set the separation distance between the seismic weight and the permanent magnet. By forming a sensible weight, it is possible to raise and lower the seismic weight.Also, by providing a seismic weight base in the valve housing, it is possible to finely adjust and set the magnetic force that will lift the entire spool assembly. The object of the present invention is to widen the permissible error range of the magnet magnetic force, the permissible processing error and the assembling error of the components used in the valve of the present invention, and reduce the occurrence rate of operating errors.

The safety valve for emergency shutoff without power supply according to the present invention for solving the above-mentioned problem is mounted on an upper end of a spool assembly which is installed vertically in a valve chamber inside a main body and opens and closes an outlet. When the permanent magnet is suspended at a fixed distance from the bottom surface of the seismic weight (acceleration sensor), the valve outlet is in an open state. When transmitted to the shut-off safety valve, the weight is sent to the sensor (acceleration sensor).
The distance between the spool assembly and the spool assembly suspended on the bottom surface of the seismic weight is increased, so that the spool assembly falls on the valve seat, closes the outlet, and impedes the flow of gas.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 to 3, a multi-function emergency shutoff safety valve to which the present invention is applied has a valve housing body 100 in which a ball valve is housed, and a cover body 200 of the valve housing body 100. And a fluid outflow pipe connecting member 3 for discharging fluid from the valve housing body 100
00, an operating pin 400 with which the seismic weight is engaged, a spool assembly 500 having a valve disk for opening and closing a fluid flow path, and a seismic weight base 600 into which the spool assembly 500 and the operating pin 400 are inserted. Adjustment tool 700 between the seismic weight and the spool assembly 500
, An O-ring 800 having a sealing function with the valve disk 501, and a ball valve 900 for opening and closing the fluid communication hole.

The valve housing body 100 has a valve chamber 101 therein, a ball valve storage chamber 102 below it, and a fluid inlet 1 communicating with the valve chamber 101 to one side.
03, a level gauge 104 below the fluid inlet 103 and a valve chamber see-through window 105 at the front.

The lid 200 is provided with a seismic weight storage chamber 201 fixed to the upper end of the valve housing body 100.

The fluid outlet pipe connecting member 300 is screwed to the lower end of the valve housing body 100 to form a fluid outlet 301.

The operating pin 400 is provided in the seismic weight storage chamber 20.
1, a tapered seismic weight support 401 is formed at the lower end, and a seismic weight 402 is inserted at the upper end. The operating pin 400 is connected to the outer peripheral wall and the seismic weight 40.
Threaded portions 410 and 420 respectively on the inner peripheral wall of the insertion hole 2
Is formed, and the vertical movement of the seismic weight 402 can be adjusted by screw connection.

The spool assembly 500 has a stem 502 provided with a hemispherical valve disk 501 having a fluid opening / closing function at the lower end. This stem 502
A vertical maintaining portion 503 having a permanent magnet 504 built therein and a locking projection 505 are formed to project vertically from the upper surface of the valve disk 501, and to be formed at the upper end.

The seismic weight base 600 is connected to the valve chamber 10.
1. The stem 502 is inserted and fixed at the top, and
Insertion hole 601 into which the vertical maintaining portion 503 is inserted, a concave portion 602 having a female screw portion 603 into which an interval adjuster 700 for adjusting the vertical movement of the seismic weight is screwed, and a sensor which detects this in the event of a fire or gas leak And a solenoid coil 604 operated by the controller.

An interval adjusting tool 700 between the sensible weight 402 and the stem 502 is connected to the sensible weight base 600 and the female screw portion 603 formed in the concave portion 602 of the sensible weight base 600, and is a male screw having a lifting function. A portion 701 is formed,
The vibration sensing weight supporting recess 702 is provided.

The O-ring 800 has a sealing function between the fluid flow path and the valve disk 501 of the spool assembly 500.

The ball valve 900 housed in the ball valve housing chamber 102 has a fluid flow hole 901 formed therein. The ball valve 900 is provided with an opening / closing handle 90.
2 is connected to the fixed valve stem 903 so that the fluid communication hole can be opened and closed and the spool assembly 500 can be restored to its original state.

As another embodiment of the multi-function emergency shutoff safety valve to which the present invention is applied, as shown in FIG. 5, a permanent magnet 504 is mounted on a support portion 401 formed below a seismic weight 402.
a, and the spool assembly 500 is suspended by the magnetic force of the permanent magnet 504a.

The operation and effect of the present invention configured as described above will be described.

The spool assembly 500 vertically disposed in the valve chamber 101 of the valve body 100 includes a hemispherical valve disk 501 formed at a lower portion and a stem vertically protruding from the upper surface of the valve disk 501. 502 and a vertical maintaining portion 503 formed at the upper end of the stem 502. Since the vertical maintaining portion 503 is inserted into the insertion hole 601 of the seismic weight base 600 fixed to the upper end of the valve chamber 101, the spool assembly 50
0 can always maintain the vertical state. In the spool assembly 500, the magnetic force of the permanent magnet 504 built in the vertical maintaining unit 503 pulls the sensing weight supporting portion 401 formed below the operating pin 400 into which the sensing weight 402 is screwed. It is brought into close contact with the bottom surface of the oscillating weight interval adjuster 700 and is suspended. Spool assembly 500
As shown in FIG. 2, the spool assembly 500 is suspended from the bottom surface of the seismic weight adjustment device 700 as shown in FIG.
A clearance is generated between the hemispherical valve disk 501 formed below the O-ring and the O-ring 800 to form a fluid passage.

At this time, the spool assembly 500
Since the locking projection 505 formed on the stem 502 abuts on the edge of the insertion hole 601 of the seismic weight base 600, the vertical state of the spool assembly 500 is accurately maintained, and the valve disk 501 and the O-ring are provided. The spacing between 800 is kept constant.

In the seismic weight base 600, a female screw part 603 is formed in the concave part 602, and the male screw part 701 of the space adjuster 700 that can adjust the space between the seismic weight 402 and the stem 502 is formed in the female screw part 603. It is screwed. Then, the seismic weight base 600 narrows or loosens the screw of the gap adjuster 700 by the action of the spool assembly 5.
It is possible to adjust the force exerted on the seismic weight supporting portion 401 by the magnetic force of the permanent magnet 504 built in the vertical maintaining portion 503 of FIG. Therefore, the safety valve for multi-function emergency shutoff to which the present invention is applied adjusts the distance between the permanent magnet 504 and the seismic weight support portion 401 to generate an overflow in which a large amount of gas flows out due to a pipe rupture. At this time, it is possible to set the sensitivity at which the spool assembly 500 suspended by the magnetic force can be detached from the bottom surface of the spacing adjuster 700 and dropped.

The operating pin 400 has threaded portions 410 and 420 formed so that the seismic weight 402 can be screw-coupled thereto, so that the height of the seismic weight can be adjusted. Therefore, it is possible to change the height of the center of weight of the seismic weight support portion 401, and thereby, it is possible to set the magnitude of the vibration that operates in the event of an earthquake.

The multi-function emergency shutoff safety valve to which the present invention is applied as shown in FIG.
Of the spool assembly 500 due to the rocking motion of the spool assembly 500
03, the bottom surface of the permanent magnet and the spacing adjuster 700 are separated from each other, the spool assembly 500 falls, the valve disk 501 quickly closes the fluid flow path, and the spool assembly 500 moves vertically. It has excellent closing function.

The seismic weight 402 once comes into contact with the wall surface of the seismic weight storage chamber 201 once the shaking stops. At this time, the position of the center of gravity of the seismic weight 402 is formed below the seismic weight 402. It will be located near the center of the bottom surface of the seismic weight support portion 401. Therefore, the operating pin 400 is immediately restored to its original state by the weight of the seismic weight 402 and maintains a vertical state.

According to the above-described operation, according to the multi-function emergency shutoff safety valve to which the present invention is applied, the outflow of gas is safely shut off. Even when a large amount of gas leaks due to the gas, accidents such as gas explosion and fire can be quickly prevented.

Further, as shown in FIG. 6, the multi-function emergency shutoff safety valve to which the present invention is applied has a solenoid-operated weight base 600 into which a vertical maintaining portion 503 having a permanent magnet 504 is inserted. The coil 604 may be provided, a gas leak detection sensor or the like may be provided, and the solenoid coil 604 may be operated in accordance with a signal from each sensor to shut off the flow path by the valve disk 500. That is, as shown in FIG. 10, the multi-function emergency shutoff safety valve includes gas leak detection sensors 905 and 907, a fire detection sensor 906, a CO leak detection sensor 908, and a control unit 909. Each sensor sends a signal to the microprocessor of the control unit 909 when it detects a carbon monoxide gas or a fire that is generated due to gas leakage or incomplete combustion of gas equipment such as a boiler. The control unit 909 that has received the signal from each sensor supplies electric energy to the solenoid coil 604 to generate a magnetic force, and as shown in FIG.
The pole of the magnetic force generated from the solenoid coil 604 (eg, N
(Pole, south pole) and the pole of the permanent magnet 504 mounted on the spool assembly 500. As a result, as shown in FIG. 8, the spool assembly 500 is strongly pressed downward from the seismic weight base 600 and falls, and the valve disc 501 of the spool assembly 500 is attached to the O-ring 80.
In this case, the gas flow path can be shut off.

As a result, it is possible to prevent further outflow of gas, and to prevent an explosion accident or the like due to the leaked gas. After that, the solenoid coil 60
As shown in FIG. 9, by generating a magnetic force of a pole opposite to the pole of the permanent magnet 504 mounted on the spool assembly 500, the spool assembly 4 can pull up the spool assembly 500 and open the valve.

The multi-function emergency shutoff safety valve to which the present invention is applied is controlled by the control unit 909 to set the time, and after a certain time has passed, the solenoid coil 604 is set.
May be generated so that the valve disk 501 can shut off the flow path.

Further, as shown in FIG. 5, the multi-function emergency shutoff safety valve to which the present invention is applied is configured such that a permanent magnet 504a is built in a support portion 401 formed below a seismic weight 402. May be. In the embodiment shown in FIG. 5, as in the previous embodiment, the spool assembly 500
The permanent magnet 504 is built in the vertical maintaining portion 503 of the. The seismic weight 402 is pulled through the bottom surface of the spacing adjuster 700 by the magnetic force of the permanent magnet 504, and the spool assembly 50.
0 is lifted, but there is a difference in the configuration in that it has a function of pulling the vertical maintaining portion 503 of the spool assembly 500 by the magnetic force of the permanent magnet 504a built in the seismic weight support portion 401. However, the operation and effect are the same.

In the present invention as well, at the time of a power failure or the like, the spool unit 500 cannot be restored by the control unit 909, and the spool assembly 500 once dropped by the vibration of the seismic weight 402 is It cannot be restored to its original state. For this reason, after the present invention interrupts the gas flow path by the spool assembly 500,
Completely shut off the gas flow path using the ball valve 900,
After taking safety measures such as inspecting and repairing the pipeline, the ball valve 900 is manually closed before the spool assembly 50 is closed.
0 is held in the seismic weight base 600, and the ball valve 9
Opening 00 makes it easy to recover.

That is, when the ball of the ball valve 900 rotates and pushes up the spool assembly 500, the spool assembly 500 is again suspended from the seismic weight base by the magnetic force, and the flow path is opened. afterwards,
When the ball valve 900 is opened, the fluid supply is restarted.

FIG. 11 shows another embodiment in which the safety valve of the present invention is applied to a gas meter. According to this embodiment, the problems caused by separately configuring and installing the gas meter device and the safety valve, namely, the increase in manufacturing cost due to the use of many types of parts and the leakage of gas from many joints. Can be prevented and the complexity of construction can be eliminated.

[0046]

According to the multi-function emergency shutoff safety valve of the present invention having the above-described structure and operation and effect, the structure is based on the principle of non-power supply operation that does not require electric energy. Although it is simple and easy to disassemble and assemble, manufacturing costs and repair costs can be greatly reduced. Also, the multi-function emergency shutoff safety valve can be used semi-permanently, and the opening and closing operation of the valve is performed by the magnetic force of the permanent magnet and the seismic weight, so that malfunctions and failures can be reduced. Since an operation is immediately performed when an earthquake is detected, an effect of preventing an accident due to gas leakage can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a state where a safety valve of the present invention is disassembled.

FIG. 2 is a longitudinal sectional view of a main part showing a state in which the safety valve of the present invention is assembled from the front.

FIG. 3 is a partial longitudinal sectional view showing a state where the safety valve of the present invention is assembled from a side.

FIG. 4 is a cross-sectional view showing a state in which a fluid passage is closed by seismic vibration or excess flow.

FIG. 5 is a sectional view showing another embodiment of the installation of the magnet in the safety valve of the present invention.

FIG. 6 is a sectional view showing a state before power is supplied to the solenoid.

FIG. 7 is a cross-sectional view showing a state where power is supplied to a solenoid.

FIG. 8 is a sectional view showing a state where a solenoid pushes a spool assembly and a valve is operated.

FIG. 9 is a cross-sectional view showing a state where the solenoid raises the spool assembly and the valve is opened.

FIG. 10 is a circuit block diagram showing an example in which a sensor for detecting gas leakage, a fire detection sensor, and a control unit are configured in the safety valve of the present invention.

FIG. 11 is a perspective view showing a state where the safety valve of the present invention is applied to a gas meter device.

[Explanation of symbols]

100 valve body, 101 valve chamber, 102 ball valve storage chamber, 103 fluid inlet, 104 level gauge,
105 valve room see-through window, 200 lid, 201 seismic weight storage chamber, 300 fluid outflow pipe connecting member, 400 operating pin, 401 seismic weight support, 402 seismic weight, 410,
420 thread part, 500 spool assembly, 501
Valve disc, 502 stem, 503 vertical maintenance part, 504, 504a permanent magnet, 600 seismic weight base, 601 insertion hole, 602 recess, 603 female screw part,
604 solenoid coil, 700 spacing adjuster, 70
1 external thread portion, 800 O-ring, 900 ball valve, 901 fluid flow hole, 902 opening / closing handle, 90
3 Valve stem, 905 Gas leak detection sensor, 90
6 Fire sensor, 907 Gas leak sensor, 9
08 CO leak detection sensor, 909 control unit

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F17D 5/06 F17D 5/06 G08B 21/16 G08B 21/16 F term (reference) 3H052 AA01 BA23 BA32 BA35 DA06 EA01 3H061 AA02 AA05 AA08 BB02 CC03 CC13 DD03 EA09 EC23 GG05 3J071 AA02 BB11 BB14 CC14 EE30 EE37 FF03 5C086 AA01 AA02 AA13 BA20 CA23 DA08 DA40 GA09

Claims (3)

[Claims] 1. A valve chamber, a ball valve storage chamber formed continuously below the valve chamber, a fluid inlet communicating with one side of the valve chamber, into which fluid flows, and a fluid inlet of the fluid inlet. A valve housing body provided with a level gauge provided at a lower portion and a valve chamber see-through window provided at a front portion, and a lid body provided with a seismic weight storage chamber fixed to an upper end portion of the valve housing body. A fluid outlet pipe connecting member screwed to a lower end of the valve housing body and having a fluid outlet through which fluid flowing into the valve housing body flows out; and a substantially tapered seismic weight support at the lower end. Part is formed, a thread groove is formed at the upper end, and a thread groove screwed to the thread groove is formed in the hole. The operating pin, which is stored vertically, A hemispherical valve disc which is held vertically in the valve chamber and has a valve opening / closing function at a lower part, a vertical maintenance part which is vertically projected from the upper surface of the valve disc and has a permanent magnet built in at an upper end part, and a flange-shaped part. A spool assembly having a stem formed with a locking projection, an insertion hole which is inserted and fixed in the upper part of the valve chamber, and a vertical maintenance part of the stem is inserted in the center of the bottom surface, and adjusts the height of the seismic weight. A recess having a threaded portion to which the interval adjuster is screwed,
A seismic weight base having a solenoid coil operated by a sensor that senses this in the event of fire, gas leakage, etc., and a screw that is screwed up and down to a threaded portion formed in the recess of the seismic weight base A space adjuster between the sensible weight and the stem, the sensible weight support recess having the sensible weight support portion of the operating pin inserted therein; and a sealing between the valve disc and the valve of the spool assembly. An O-ring for performing a function, a fluid passage hole housed in the ball valve housing chamber, through which the fluid flowing into the valve chamber passes, and a handle connected to a valve stem to which a handle is fixed, and A multi-function emergency shutoff safety valve having a ball valve for opening and closing a hole and restoring the spool assembly. 2. A power supply for operation is supplied to the solenoid coil by receiving a signal sensed by each of the sensors or a timer setting signal, further comprising a fire sensor, a gas leak sensor, and a carbon monoxide sensor. 2. The multi-function emergency shut-off safety valve according to claim 1, further comprising a control unit having a built-in microprocessor for shutting off fluid outflow from the housing body and outputting an audio alarm. 3. The safety valve according to claim 1, wherein a permanent magnet is incorporated in the seismic weight support.