JPH04203571A - Remote control device for stopping supply of gas - Google Patents

Abstract

PURPOSE:To surely stop the supply of gas by detecting an abnormality such as earthquake or the like so as to open a pressure relief valve in order to allow the pressure of working medium in a control pipe to be relieved into a tank, thereby a shut-off valve is closed. CONSTITUTION:Upon normal gas usage, when a control valve 15 is set at a closed position, a manipulation switch 47 for a pump 16 is associatingly positioned on the start side. Further, a change-over switch 1 is turned to a position at which the pump 16 may be started, and accordingly, the pressure of working medium in a control pipe 11 is increased. Then, the pump 16 is stopped by the change-over switch 17, and accordingly, the control pipe 11 is held in a pressure rise condition so that a main shut-off valve 11 is held in an opening condition. Sensors 62, 63 detect an abnormality such as earthquake or the like, and accordingly, a pressure relief valve 49 is opened so that the pressure in the control pipe 11 is relieved into a tank 19. Accordingly, the pressure of the control pipe 11 decreases. With this arrangement, the main shut-off valve 1 is closed so that the supply of gas to the as supply pipe 3 is automatically stopped.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a gas supply stop remote control device that automatically stops gas supply in the event of an earthquake or gas leak. [Prior Art] Conventionally, as this type of gas supply stop remote control device, structures of Japanese Utility Model Publication No. 60-20867, Japanese Utility Model Publication No. 6-20371, and Japanese Utility Model Application Publication No. 58-109674 are known. There is. All of these conventional structures were proposed by the applicant, and each has its own unique effects and is highly practical.8 [Problems to be Solved by the Invention] However, each of the above conventional structures In the case of , each of the above structures still has insufficient points in terms of operability, and also has disadvantages in the implementation stage such as combination of each structure. [Means for Solving the Problems] The purpose of the present invention is to solve such inconveniences. A main opening/closing valve that can be opened only when the pressure is increased, a pressure increasing mechanism that can increase the pressure inside the control pipe with a tank that stores working medium, and an operation that can reduce the pressure inside the control pipe by releasing the pressure of the working medium to the tank side when opening the tank. The pressure increasing mechanism is equipped with an operation part consisting of a valve, a pressure relief valve connected to a sensor capable of detecting earthquakes and gas leaks, and capable of automatically escaping the pressure of the working medium in the control pipe to the tank side.
It consists of a changeover switch that can start and stop the pump, and a changeover mechanism that switches the changeover switch to the pump stop side when the working medium reaches a predetermined pressure, and changes the changeover switch to the pump startable side when the pressure of the working medium decreases, and the above operation A gas supply stop remote control device is characterized in that a pump operation switch that is linked to the opening/closing operation of a control valve is provided in a part thereof. [Function] When the gas is not used, such as when the machine is out for a long period of time, the pressure of the working medium in the control pipe escapes to the tank side when the control valve on the control unit is opened.
The pressure inside the control pipe decreases, which closes the main on-off valve and cuts off the gas supply from the gas source to the gas supply pipe. When this shuts off, it is linked to the operation valve! . The operation switch of the pump is set to the stop side, and the changeover switch is switched to the pump startable side by the switching mechanism. When gas is used under normal conditions, when the operation valve on the operation unit is closed, the pump operation switch is linked to this and is positioned on the pump start side, and the changeover switch is switched to the side where the pump can be started by the changeover mechanism, so the pressure increases. The pump of the mechanism starts, and the pressure of the working medium in the control pipe increases. When the working medium reaches a predetermined pressure, the switching mechanism switches the switch to the pump stop side, the pump stops, and the pressure in the control pipe increases. By holding the main on-off valve in an open state, gas can be supplied from the gas source to the gas supply pipe. If an earthquake or gas leak occurs in this normal state, a sensor detects this, and the sensor opens the pressure relief valve to release the pressure of the working medium in the control pipe to the tank, reducing the pressure in the control pipe. As a result, the main on-off valve closes, and gas supply from the gas source to the gas supply pipe is automatically stopped. [Embodiment] Figures 1 to 7 show an embodiment of the present invention, and 1 is a main on-off valve, which is installed in a gas supply pipe 3 that connects a gas source or gas cylinder and various gas appliances. In this case, as shown in FIG. 3, a valve body 4 is interposed between the three gas supply pipes, a shutoff body 5 is provided within the valve body 4 so as to be movable up and down, and a connecting rod 6 is attached to the shutoff body 5.
The cylinder tube 7 is attached to the valve body 4, and the connecting rod 6 is protruded outside the cylinder i'17 through the inside of the cylinder tube 7. A piston 8 is formed on the connecting rod 6, and a knob 9 is attached to the protruding end. A dustproof rubber 10 is interposed between the knob 9 and the cylinder tube 7, and a control pipe 11 is connected inside the cylinder tube 7. However, control tube 1
When the pressure of the working medium W in 1 increases and reaches a predetermined pressure or higher, the piston 8 rises against the spring 12, and the shutoff body 5 is lifted to an open state. It is now possible to supply gas to the control pipe 11.
When the pressure of the working medium W, in this case the antifreeze liquid, within 100°C decreases, the spring 12 lowers the shutoff body 5 to the closed state as shown in FIG. Become. Reference numeral 13 denotes an operating section, which includes a pressure increasing mechanism 14 and an operating valve 15. As shown in FIG. 4.5, the pressure increasing mechanism 14 includes a pump 16,
It consists of a changeover switch 17 and a changeover mechanism 18. In this case, an inner cylinder body 20 is formed in a tank 19 that stores the working medium W, and a discharge port 21 is provided at the bottom of the inner cylinder body 2o, and a suction port 22 is provided on the side surface. A check ball 23 is formed at the suction port 22.
A connecting body 25 having a discharge passage 24 is attached to the bottom of the inner cylindrical body 20, and a pump 16 with a built-in motor and crank mechanism is attached to the tank 19 via a bracket 26, and the plunger 27 is reciprocated by this crank mechanism. The sliding path 28 of the plunger 27 is provided movably in the discharge path 24.
A changeover switch 17 is attached to the bracket 26, the pump 16 is electrically connected to a commercial power source, etc., and a changeover switch 17 is connected to this electric circuit so as to be openable and closed. In this case, a manual plunger 30 having a handle 29 is slidably installed inside the inner cylinder 17, and a return spring 31 is installed inside, and the working medium W is discharged from the discharge passage 24 by reciprocating the manual plunger 30. It is configured to be possible. Further, the operation valve] 5 is attached to the above-mentioned connecting body 25, and the valve body 3
A valve chamber 33 is formed inside the valve chamber 2, and a bridge body 34 is slidably installed inside the bridge body 34 facing the discharge passage 24.
4 to close the discharge passage 24 via the rubber 36, connect the control pipe 11 to the valve chamber 33, connect the pressure gauge 37 to the valve chamber 33, and then move the operating knob 38 from the vertical position. It is attached so that it can be rotated by 90 degrees, and a reflux path 39 is provided between the valve chamber 33 and the tank 19. When the operating knob 38 is positioned vertically as shown in FIG. The reflux path 39 is configured to open when it is rotated 90 degrees clockwise. The switching mechanism 18 also includes a switching cylinder 40 attached to the bracket 26, a piston shaft 41 slidably installed inside the switching cylinder 40, and a communication pipe 42 connected between the valve chamber 33 and the inside of the switching cylinder 40. , a spring 43 for retracting the screw shaft 41 is installed inside the switching cylinder 40, and the piston shaft 41 has pressing portions 4545 facing both ends of the slide button 44 for opening/closing the switching switch 17. The switching member 46 in the shape of a wafer-shaped steel is constructed by separating the switching member 46 (=i). Also, the operation valve 15 has an operation switch 47 built therein.
The operation switch 47 and the changeover switch 17 are connected to the electrical cord 4.
8 are connected in series, and when the operating knob 38 is positioned vertically, the circuit is closed, and when the operating knob 38 is rotated 90 degrees, the circuit is opened. Therefore, the operation knob 38 can be rotated 90 degrees.

[Also, when the operation valve 15 is rotated from the vertical position to the vertical position shown in FIG. The slide button 44 is switched by the action of the spring 43 to the side where the pump 16, which is the circuit closing side, can be started, so the pump 16 starts and the plunger 27 moves reciprocatingly, and this reciprocating movement causes the reverse movement. Due to the action of the stop ball 23, the working medium W in the tank 19 is sucked in through the suction port 22 and is discharged from the discharge port 21 in a pulsating manner, and the working medium W pushes back the piece body 34 against the pressing spring 35. The working medium W is discharged into the valve chamber 33, and as a result, the working medium W flows into the control pipe 11, and the pressure inside the control pipe 11 increases. When the pressure of the working medium W increases, the piston shaft 41 of the switching mechanism 18 moves to protrude. Then, the other pressing part 45 of the switching member 46 slides the opening/closing slide button 44, the changeover switch 17 opens a circuit and switches to the pump 16 stop side, the pump 16 stops operating, and the inside of the control pipe 11 is turned off. Maintained at constant pressure. Further, when the operating knob 38 of the operating valve 15 is rotated 90 degrees, the recirculation passage 39 opens, the working medium W escapes to the tank 19 side via the valve chamber 33, the pressure inside the valve chamber 33 decreases, and the piston of the switching mechanism 18 The shaft 41 is moved back by the spring 43, and the switching member 46
One of the pressing parts 45 presses the opening/closing slide button 44
Slide the selector switch 1 to the state shown in the figure.
7 will be switched to the pump operable side, and the operation switch 47 will open the circuit. Reference numeral 49 denotes a pressure relief valve, and in this case, as shown in FIG. 6.7, a valve body 5 is installed in a container body 50, and a bypass pipe 53 connected to the control pipe 11 is connected to a valve passage 52 in the valve body 51. and valve body 5
A valve pipe 54 is slidably inserted into the upper part of the valve pipe 54, a communication hole 55 is formed in the lower side surface of the valve pipe 54, and a steel ball 57 capable of closing the passage 56 is provided at the lower end of the passage 56 in the valve pipe 54. A spring 58 is provided which abuts and presses the steel ball 57, a rubber pipe 59 is connected to the upper end of the valve pipe 54, and a return liquid pipe 60 connected to the tank 19 is connected to the rubber pipe 59. ing. 61 is an air vent valve. 62 is a sensor for detecting an earthquake, and 63 is a sensor for detecting gas leakage. In this case, a support rod 64 is attached to the valve body 51.
is provided so that it can be rotated downward from a horizontal position by a pin 65,
A support ring 66 is attached to the tip of the support rod 64, a link 67 is pivotally connected to the valve body 51, a push rod 68 is pivotally connected to the link 67, and the base end of the push rod (') 8 is attached. A push ring 69 that can be brought into contact with the upper surface of the valve pipe 54 is provided near the top of the valve pipe 54, and a chain 71 that rests on the support ring 66 and is connected to a weight 70 is attached to the tip of the push rod 68. Connection 1-1 vessel 5
A locking plate 73 is swingably attached to the screw 72 on the
The support rod 64 is placed on the stop plate 73 to form a placement surface 74 for holding it in a horizontal state, and the plunger 76 of the electromagnetic solenoid 75 is connected to the stop plate 73 to detect gas leakage from the electromagnetic solenoid 75. A sensor 63 that outputs a signal is electrically connected for purification. Therefore, the working medium W in the control pipe 11 flows into the valve passage 52 of the valve body 51 via the bypass pipe 53, and the spring 58
Since the steel ball 57 is pushed up, the valve pipe 54 rises by 1 and the valve passage 52 is closed. If an earthquake occurs in this normal state, the weight 70 will fall from above the support ring 66 of the support rod 64. However, the push rod 68 is rotated downward, and at this time the push ring 69 pushes down the valve pipe 54,
Therefore, the communication passage 55 is opened, and the working medium W flows back into the tank 19 through the return liquid pipe 00, so that the pressure in the control pipe 11, the valve chamber 33, and the communication pipe 42 decreases, and the main on-off valve 1 is closed. Therefore, when the sensor 63 detects a gas leak, the electromagnetic solenoid 75 is activated, the plunger 76 is pulled, and the locking plate 73 swings around the bottle 72. i! ! The support rod 64 is removed from the mounting surface 74, and the support rod 64 swings downward as shown in the imaginary line in FIG.
6 falls from above, and the pushing rod 68 is swung downward by the weight 70. At this time, the pushing ring 69 pushes down the valve pipe 54, so that the communication passage 55 is opened [,, the working medium W is returned to the The water flows back into one tank through the pipe 60, and the pressure in the control pipe 11, valve chamber 33, and communication pipe 42 decreases, and the main on-off valve 1 closes. Since this embodiment has a two-state configuration, when the operation valve 15 of the operation part 13 is opened when the gas is not used, such as when the gas is not used for a long time, the pressure of the working medium W in the control pipe 11 escapes to the tank 19 side, and the control pipe The pressure inside 11 decreases, and as a result, the 1-open m valve 1 is closed, and the gas supply from the gas source 2 to the gas supply pipe 3 is cut off. At this time of shutoff, the operation switch 47 of the pump] 6 is located on the stop side in conjunction with the operation valve 15, and the changeover switch 17 is switched to the pump startable side by the changeover device [18. When using gas in a normal state, etc., when the operation valve 15 of the operation section 13 is closed, the operation switch 47 of the pump 16 is moved to the start side of the pump 16 in conjunction with this, and the changeover switch 17
is switched to the side where the pump can be started by the switching mechanism 18, so the pump 16 of the boosting mechanism 14 is started, and the pressure of the working medium W in the control pipe 1 increases, and the working medium W reaches a predetermined pressure. Then, the changeover mechanism 18 switches the changeover switch 17 to the pump stop side, the pump 16 stops, and the pressure inside the control pipe 11 is maintained in an increased state, so that the main on-off valve is held open, and the gas source 2 is Gas can be supplied to the gas supply pipe 3. If an earthquake or gas leak occurs in this normal state, the sensor 62
．． 63 detects this, and this sensor causes the pressure relief valve 49 to open and reduce the pressure of the working medium W in the control pipe 11 to the tank 19.
The pressure inside the control pipe 11 decreases, causing the main on-off valve 1 to close, and the gas supply from the gas source 2 to the gas supply pipe 3 to be automatically stopped. Therefore, it is possible to significantly improve switching operability when gas is not used, such as during long-term absence, or when gas is used in normal conditions, and it is also easier to deal with earthquakes and gas leaks. This makes it possible to prepare with all possible precautions and to facilitate implementation. It should be noted that the present invention is not limited to the above-mentioned embodiments, and the shape and structure of each mechanism can be designed with appropriate changes. [Effects of the Invention] As described above, the present invention can significantly improve switching operability when gas is not used, such as during long-term absence, or when gas is used, such as in normal conditions, and it is possible to significantly improve the switching operability when gas is used, such as when the person is away for a long period of time. This makes it easier to prepare for earthquakes and gas leaks, and it also becomes easier to implement. As described above, the intended purpose can be fully achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an overall layout diagram, FIG. 2 is a layout system diagram of its main parts, FIG. FIG. 5 is a partial cross-sectional view of the operating portion, FIG. 6 is a cross-sectional view of the forward travel valve portion, and FIG. 7 is a cross-sectional view thereof. l...Opening/closing valve, 2.Gas source, 3...Gas supply pipe, 1
3. Operation unit, 1, 4. Boosting mechanism, 15. Operation valve, 1°6. Pump, 17. Selector switch, 18.
・Switching mechanism, 1...tank, 47...operation switch...
Notch, 49... Forward valve, W... Working medium. November 29, 1990

Claims (1)

[Claims] A main opening/closing valve that is disposed between the gas source and the gas supply pipe and can be opened only when the pressure in the control pipe is increased by the working medium, and a pressure increasing mechanism and opening that is equipped with a tank storing the working medium and capable of increasing the pressure in the control pipe. The operating part consists of an operation valve that can release the pressure of the working medium to the tank side during operation and reduce the pressure in the control pipe, and is connected to a sensor that can detect earthquakes and gas leaks, automatically transferring the pressure of the working medium in the control pipe to the tank side. The pressure increasing mechanism includes a pump, a changeover switch that can start and stop the pump, and when the working medium reaches a predetermined pressure, switches the changeover switch to the pump stop side and stops the working medium. A gas supply stop remote control device comprising a switching mechanism that switches a changeover switch to a side where the pump can be started when the pressure decreases, and wherein the operation section is provided with a pump operation switch that is linked to opening and closing operations of the operation valve.