JP2001254853A - Supply gas shut-off device used against both earthquake and gas leakage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple and low-cost supply gas shut-off device for preventing danger caused when both of an earthquake and gas leakage occur. SOLUTION: An opening and closing valve 2 rotating by substantially 90 deg. is provided at a predetermined point of a vertical gas supply pipe 1, and a rotary operation lever 3 using substantially 45 deg. rotation positions in the vertical direction to open and close the valve, respectively, is attached to a rotary shaft 2a of a valve main body. A loading plate 4 for loading a weight ball 6 stationarily is provided in a pipe part at a lower position of the valve 2, and the weight ball 6 and a tip part of the rotary lever 3 are mutually connected by a chain 8 having a predetermined length. When an earthquake occurs, the weight ball 6 drops from the loading plate 4a to rotate the rotary lever 3 from 'open' position to 'close' position due to its self-weight. Furthermore, an electromagnetic solenoid 9 is attached to an outer face on one vertical side wall of the loading plate 4, and when an indoor gas leakage detector operates, a plunger 10 of the electromagnetic solenoid 9 protrudes due to a current of its signal line 11 to roll and drop the weight ball 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for automatically shutting off gas supply for both anti-seismic use and gas leakage.

[0002]

2. Description of the Related Art In a general household or business supply system for city gas or propane gas, a terminal gas cock (plug) of a gas supply line is released by a predetermined rotation to use a terminal device such as a gas stove. In the event of an unforeseen earthquake during the use of ignition combustion, it is necessary to immediately close the cock and shut off the gas supply in order to prevent danger.

[0003] However, since there is not always a user at the user terminal at the time of the emergency earthquake, there have been various ideas for automatically shutting off the gas supply by using, for example, a falling weight. Proposed.

[0004] However, the necessity of the above-mentioned emergency supply of gas is generally more severe than an earthquake that occurs very rarely. It is difficult for a user to detect the occurrence of gas leakage or the like directly and early as in the case of an earthquake, and it is extremely dangerous if left unattended for a long time.

[0005] For this reason, devices that detect gas leaks in a room and notify the user with a warning sound or the like using a relatively simple device have recently become widespread. Therefore, if the user is not always present at the site of the room, there is a high risk that accidental ignition or gas poisoning or the like will occur if only a warning sound such as a buzzer is generated.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described aspects, and is intended to be used not only in the event of a gas leak accident in normal times but also in the event of an accidental earthquake during gas combustion and utilization. Provided is a structure capable of automatically stopping gas supply even when a relevant person is not present at that time, a gas supply shut-off device which is relatively simple in restoring operation, and is inexpensive. It is an object.

[0007]

In the present invention, therefore, the object of the present invention is to provide a gas supply cutoff device for both anti-seismic use and gas leakage in any of the following items (1) and (2). Is to achieve.

(1) At a predetermined point of the vertical gas supply pipe, approximately 9
With a 0 ° rotary on-off valve interposed, a rotary operation lever with valve opening and valve closing points respectively at approximately 45 ° upward and downward relative to a horizontal plane passing through the center of the valve body rotation axis is provided, The valve closing weight rolling element is mounted on a substantially horizontal mounting plate provided below the downward rotation position of the tip of the rotary operation lever, and the weight rolling element, the lever tip and Are connected by a flexible flexible line member having a length equal to or longer than the moving range of the distal end portion, and when the gas supply pipe encounters an earthquake of a predetermined seismic intensity or more, the vibration causes the weight to fall. When the rolling element falls by its own weight from the mounting plate described above, or when the gas leak detection means disposed in the room is activated, the detection signal current drives the plunger push-out type electromagnetic solenoid means. By Wherein the weight rolling element falls by its own weight from the mounting plate, and the rotary operation lever is configured to move from the valve open position to the closed position, respectively. Supply gas shut-off device for both uses.

(2) One horizontal end of the mounting plate is pivotally movable, and the opposite end is horizontally supported by a plunger of a plunger retractable electromagnetic solenoid means, and the gas leak detecting means operates. When the detection signal current is applied, the electromagnetic solenoid means is driven to drop the mounting plate by its own weight pivotally, whereby the weight rolling element falls under its own weight, and the valve closing position of the rotary operation lever is lowered. The supply gas shut-off device for both anti-seismic use and gas leakage as described in (1) above, wherein the supply gas shut-off device is moved.

[0010]

According to the structure of the present invention as described above, a relatively low-cost and simple structure can be used not only for anti-seismic purposes in the event of an unforeseen earthquake, but also for automatic indoor gas leakage accidents during normal times. It is possible to prevent the occurrence of an unexpected accident by shutting off the gas being supplied.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on a plurality of examples with reference to the drawings.

[0012]

(Embodiment 1) FIG. 1 is a front view of a first embodiment of a supply gas shut-off device for both anti-seismic use and in the event of gas leakage according to the present invention, and its AA arrow view (a). Is shown.

<Structure> In FIG. 1, reference numeral 1 denotes a vertical pipe (pipe) having a predetermined size for gas supply, and reference numeral 2 denotes an approximately 90 ° rotary on-off valve (gas cock) interposed at a predetermined position.
Is shown. Reference numeral 3 denotes a rotary operation lever fixed to the rotary shaft 2a of the valve main body. The valves are respectively opened and closed by approximately 45 degrees above and below a horizontal plane passing through the axis.
The position has been set.

A rolling weight ball 6 (roller-shaped) for closing the valve 2 is mounted at a predetermined distance below the position of the valve 2 by a mounting tool 5 (it does not necessarily have to be on a pipe). The mounting plate is a substantially horizontal, substantially rectangular mounting plate for mounting, and an angle-shaped vertical wall surface 7 is fixed to two adjacent sides thereof.

On the mounting plate 4, an angled vertical wall 7 is provided.
The weight ball 6 is placed at its corner so as to be stationary by its own weight, and the other end of a chain 8 of a predetermined length having one end fixed to a part of its surface is inserted into the tip hole of the rotary lever 3. When the weight ball 6 is fixed and vibrates due to the occurrence of an earthquake of a predetermined seismic intensity or more and rolls and falls freely from the mounting plate 4, the rotation operation lever 3 at the “open” position is closed by the weight of the ball 6. "
Operates to automatically rotate to the position.

An opening 7a is formed in the contact point portion of the weight ball 6 at the time of stationary mounting at a substantially central portion of one of the angled vertical wall surfaces 7 of the mounting plate 4, and the opening is opposite to the wall surface. An electromagnetic solenoid 9 having a protruding plunger 10 is attached to the side surface. The plunger 10 is in a retracted position when the plunger 10 is not operated, and when a gas leak detecting unit (not shown) arranged in the room detects a gas leak, The electromagnetic solenoid 9 is simultaneously activated by the current connected to the signal line 11 for activating the audible alarm generating means, etc., and the plunger 10 momentarily protrudes to roll down the weight ball 6 from the mounting plate 4, As in the case of the earthquake, the rotation operation lever 3 in the “open” position is operated to be in the “closed” position, thereby preventing occurrence of an accident.

The weight of the substantially spherical weight ball 6 is determined by the required operating force of the rotary operation lever 3, and the minimum seismic intensity at which the weight ball 6 rolls on the mounting plate 4 and falls. If necessary, the required slight reverse inclination degree of the mounting plate 4 can be experimentally determined by an experimental vibration generating device or the like in a flame prevention center or the like.

The shapes, mounting methods, side walls, and the like of this embodiment shown in FIG. 1 are merely examples.
Of course, various modifications may be made as long as the intention is the same.

<Operation> With the configuration of the present embodiment as described above, it is possible to provide the simplest and low-cost safety device for both anti-seismic use and gas leakage in comparison with a conventional safety device of this type. it can.

(Embodiment 2) Next, a second embodiment of a supply gas shut-off device for anti-seismic use and in case of gas leakage according to the present invention is shown in a front view and an AA arrow view (a). Figure 2 showing
This will be described with reference to FIG.

<Structure> In FIG. 2, the same members as those in FIG. 1 are denoted by the same reference numerals, and the duplicated description thereof will be omitted.

In this embodiment, the function of causing free fall of the weight ball 6 from the mounting plate 4 during the earthquake in the first embodiment by the vibration of the earthquake is exactly the same, and the vibration is generated. In the event of a gas leak accident, one side of the mounting plate 4 is constituted by a hinge 12, and the lower portion of the side opposite to the hinge 12 is supported by a retractable plunger 10a of an electromagnetic solenoid 9a fixed to the side wall portion 7 and provided indoors. When the gas leak detector (not shown) is activated, the retractable plunger 11 is retracted and driven by the electric current of the signal line 11 for activating a warning sound generating means such as a buzzer.
By actuating a, the weight ball 6 is allowed to fall freely, and the rotary lever 3 is moved to the "closed" position as in the case of the above-mentioned earthquake.

It is to be noted that the self-weight pivoting drop type mounting plate 4 shown in FIG.
a, the electromagnetic solenoid means 9a and the retractable plunger 10a for locking and support, and their positions, etc., show one embodiment, and are not limited to only the illustrated examples, but employ various modifications. Of course you can.

<Operation> According to the above-described embodiment of the present invention, for the purpose of earthquake countermeasures, the operation is exactly the same as that of the embodiment shown in FIG. 1, and when the gas leaks without vibration, the sensor operation is performed. The on / off valve 2 is closed by the falling of the weight ball 6 at the same time by the operating current of the audible alarm means and the like.

[0025]

As described above, according to the present invention,
With a very simple and low-cost mechanism, it is possible to provide an anti-seismic and gas leakage gas supply device that operates reliably.

[Brief description of the drawings]

FIG. 1 is a front view of a supply gas shut-off device for both anti-seismic use and gas leaks according to a first embodiment, and its AA arrow view.

FIG. 2 is a front view of a supply gas shut-off device for both anti-seismic use and when a gas leaks according to a second embodiment, and its AA arrow view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vertical gas supply pipe (pipe) 2 Approximately 90-degree rotary opening / closing valve (gas cock) 2a Rotating shaft 3 Rotating operation lever 4 Mounting plate 4a Self-weight pivoting drop type mounting plate 5 Mounting tool 6 Weight ball (rolling element) Reference Signs List 7 Vertical wall surface 7a Opening 8 Chain 9, 9a Electromagnetic solenoid 10 Projecting plunger 10a Retractable plunger 11 Gas leak signal line 12 Hinge

Claims (2)

[Claims] 1. At a predetermined point of a vertical gas supply pipe, approximately 90 °
In addition to interposing a rotary on-off valve, a rotary operation lever is provided which has a valve opening and a valve closing point respectively at a rotation position of approximately 45 ° above and below a horizontal plane passing through the center of the rotation axis of the valve body. The valve closing weight rolling element is mounted on a substantially horizontal mounting plate provided below the downward rotation position of the distal end portion of the operation lever, and the weight rolling element and the lever distal end portion are disposed. When the gas supply pipe encounters an earthquake of a predetermined seismic intensity or more, the structure is connected by a flexible flexible line member having a length equal to or longer than the moving range of the tip portion,
Due to the vibration, the weight rolling element falls by its own weight from the mounting plate described above, or, when the gas leak detecting means disposed in the room is activated, the plunger push-out type is detected by the detection signal current. By driving the electromagnetic solenoid means,
The weight rolling element falls under its own weight from the mounting plate, and the rotary operation lever is configured to move from the valve open position to the closed position. Supply gas shut-off device. 2. A horizontal end of the mounting plate is configured to be pivotable, and an opposite end of the mounting plate is horizontally supported by a plunger of a plunger retractable electromagnetic solenoid means, and the gas leak detecting means is operated. At this time, by driving the electromagnetic solenoid means by the detection signal current to cause the mounting plate to drop by its own weight pivotally, the weight rolling element falls by its own weight, and the valve closing position of the rotary operation lever moves. The supply gas shut-off device for both anti-seismic use and gas leaks according to claim 1, characterized in that: