JPS62292983A - Gas trouble preventing system - Google Patents

Abstract

PURPOSE:To previously prevent gas leak by representing the voice corresponding to the state by a control mechanism when the abnormal signals such as the lowering of gas pressure and gas leak are received. CONSTITUTION:When the opening button 10 of a control mechanism 8 is pressing-operated, a cut-off valve mechanism 5 is opened for a prescribed time, and gas is introduced into the downstream side of the cut-off valve mechanism 5, and the gas pressure is inspected for a prescribed time by a pressure sensor built in the cut-off valve mechanism. When the gas pressure is not lowered, the valve is opened, and the voice corresponding to the state is represented. When the gas pressure lowers below a certain pressure, the valve closed state is maintained, and the voice corresponding to the state is represented. When the gas pressure lowers for a prescribed time during the time when the cut-off valve mechanism 5 is opened, an alarm lamp is flashed by instantly closing the cut-off valve mechanism 5 by controlling the control mechanism 8 by the input signal, and at the same time, the voice corresponding to the state is represented.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a gas accident prevention system used for LP gas, city gas, etc. This invention relates to a gas accident prevention system that prevents accidents caused by such causes and displays corresponding sounds not only in abnormal conditions but also in normal conditions.

(Conventional technology and its problems) Recently, gas leak prevention measures and safety devices have become popular in the gas consumption market, and among these, gas leak alarm shutoff devices and pressure/flow detection shutoff devices are attracting attention. .

Conventional devices of this kind have been designed to manually close the main gas valve in response to the alarm from a gas leak alarm, prevent overflow of gas with a fuse cock, or use shutoff devices and pressure controls linked to the gas leak alarm. Gas pressure drop shut-off devices with built-in sensors have also been commercialized, but all of these devices have complex structures, are extremely troublesome for users to handle, are prone to erroneous operation, and increase the cost of the device. Because
The reality is that it is not widely used, and there were high hopes for the development of a device with practical value.

The present invention was developed in view of the above-mentioned circumstances and in response to the demands of the market.It prevents accidents caused by causes such as a drop in gas pressure and gas leakage, and makes handling extremely simple, especially when the valve is opened. In addition to making the gas available for use as soon as possible, safety is further improved, and a sound corresponding to the situation is displayed not only in abnormal conditions but also in normal conditions, making handling easier and more reliable. The purpose is to provide a gas accident prevention system that allows

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a shutoff valve mechanism with a built-in pressure sensor near the flow path of a gas supply source, and provides a pressure detection signal of the shutoff valve mechanism. A control mechanism is provided to control an abnormal signal such as a gas leakage detection signal or the like, and after opening the shutoff valve mechanism for a predetermined period of time by operating an open button of the control mechanism and sealing gas in the downstream side of the shutoff valve mechanism. The shutoff valve mechanism is closed, and the gas pressure is checked for a predetermined period of time. If the gas pressure has not decreased, the valve will open and a corresponding state voice will be displayed. If the gas pressure has decreased, the valve will be closed. When the valve is held open, the control mechanism receives a low gas pressure, gas leak, or other abnormality signal and closes the shutoff valve mechanism, and a sound message indicating the response status is displayed. Further, the shutoff valve mechanism is closed by operating a close button of the control mechanism, and the valve is kept in the closed state if the gas pressure has not decreased for a predetermined period of time, and the valve is kept in the closed state if the gas pressure is decreased. When the reset button of the control mechanism is operated, a control mechanism that receives a signal of a decrease in gas pressure, a gas leak, or other abnormality displays an audio message indicating the corresponding state.

(Function) According to the present invention, when the open button of the control mechanism is depressed, the shutoff valve mechanism opens for a predetermined period of time (for example, 5 seconds), and gas is sealed in the downstream side of the shutoff valve mechanism. 10
The pressure sensor built into the shutoff valve mechanism inspects the gas pressure, and if the gas pressure has not decreased, the valve opens, a corresponding status sound is displayed, and the gas can be used, and the gas pressure is below a certain level. If the level is low, the valve will be kept closed and an audio message will be displayed to notify you of a gas leak. In addition, while the shutoff valve mechanism is open, the gas pressure remains constant for a predetermined period of time (
For example, when the gas leak alarm detects a gas leak continuously for a predetermined period of time (for example, 40 seconds), or when it receives an abnormal signal from an external source, control is performed using the input signal. Under the control of the mechanism, the shutoff valve mechanism is instantaneously closed, the warning lamp flashes, and at the same time, a corresponding sound is displayed.

Furthermore, when the close button of the control mechanism is pressed.

The shutoff valve mechanism is closed for a predetermined period of time (for example, 5 minutes), a pressure test is performed, and if the gas pressure has not decreased, the valve is kept closed, and after that, the normal open button operation becomes possible. On the other hand, in this case, if the gas pressure is low, the valve will remain closed and cannot be opened after that, so if you press the reset button on the control mechanism, the gas pressure will drop and the gas leak alarm will be activated. Since a sound corresponding to the detection of a gas leak or other abnormal state from the outside is displayed, the state of the gas accident can be immediately confirmed by the sound.

(Embodiment) The drawings show an embodiment of the present invention, and FIG. 1 is a schematic explanatory diagram of the gas accident prevention system according to the present invention, and FIG.
The figure is a detailed explanatory diagram illustrating the details of the operation of the gas accident prevention system according to the present invention, and FIG. 3 is a sectional view showing the cutoff valve mechanism of the gas accident prevention system according to the present invention.

In FIG. 1, in a position near a gas meter 3 in a flow path (piping) 2 of a gas supply source 1 such as an LP gas cylinder or city gas,
A shutoff valve mechanism 5 having a built-in pressure sensor 4 is provided outdoors. This pressure sensor 4 may be provided not only inside the cutoff valve mechanism 5 but also on the downstream side of the cutoff valve mechanism 5. Further, a pipe 6 on the downstream side of the shutoff valve mechanism 5 is connected to an indoor gas burner 7 such as a gas stove, a gas burner, or a gas stove.

Reference numeral 8 denotes a control mechanism for controlling the opening and closing of the shutoff valve mechanism 5. This control mechanism 8 is placed indoors as shown in FIG.
The shutoff valve mechanism 5 can be automatically closed by controlling the gas leak detection signal from the sensor or other abnormal signals from disaster prevention equipment such as earthquake sensors, and the usage status can be determined by an audio display circuit equipped with an audio IC chip. It has an output terminal that displays the status of gas leakage etc. with audio, and outputs information on gas leakage, alarm normality, and abnormality as external signals. In addition, the shutoff valve mechanism 5 can be remotely opened and closed using the open button 10 and the close button 11, and has an automatic safety return function using the reset button 12.
Indicator lights 13 (power lamp 13a, fully open lamp 13b, fully closed lamp 13c, and alarm lamp 13d) are provided so that the status of the control mechanism 8 can be confirmed by the lamps.

Further, the control mechanism 8 may be provided with a power outlet (not shown), or may have a structure in which disaster prevention equipment such as a gas leak alarm can be directly attached and detached.

Here, to explain the internal structure of the cutoff valve mechanism 5 shown in FIG. 3, the valve body 1 has an upstream side 14 and a downstream side 15.
An electromagnetic section 17 is provided at the downstream side 15, and a valve section 19 provided with a diaphragm 18 is opened and closed by an electric signal from the control mechanism 8.
A pressure sensor 4 is provided in the detection path 20 provided in the pressure sensor 4, and a detection signal from the pressure sensor 4 is sent to the control mechanism 4i18, and the control mechanism 8 automatically opens and closes the shutoff valve mechanism 5. Also,
This cutoff valve mechanism 5 is provided with a manual operation section 21 to enable manual operation.

FIG. 2 is a detailed explanatory diagram illustrating the details of the operation of the gas accident prevention system in this embodiment. In the figure, under normal conditions, when the button 10 is pressed down while the control mechanism 8 5 opens the valve for 5 seconds, seals gas into the downstream side 15 of the cutoff valve mechanism 5, and immediately closes the valve, and at the same time an audio signal is output and a message saying "Please wait for a while" is displayed. At this time, the pressure sensor 4 built into the shutoff valve mechanism 5 inspects the gas pressure on the downstream side 15 for 10 seconds,
If the gas pressure has not fallen below a certain value, the valve will open and an audio signal will be output saying "Please use the gas", allowing the user to use the gas with peace of mind. On the other hand, if the gas pressure has fallen below a certain value and a drop in gas pressure is detected continuously for 2 seconds with the valve closed, the valve will remain closed and the alarm lamp 13d will blink and at the same time an audio signal will be output. A voice message appears saying, "There is a gas leak. Please check." Also, shutoff valve 4! ! While the valve of structure 5 is open,
For example, when the gas pressure drops continuously for 2 seconds due to the combustor 7 going out or cracks in the piping, or when the gas leak alarm 9 detects a gas leak continuously for 40 seconds, or from other external sources. When an abnormality signal is received, the control mechanism 8 closes the shutoff valve mechanism 5 instantly or after a predetermined period of time, causing the alarm lamp 13d to blink and at the same time warns ``Abnormality''.

Gas is turned off.'' or ``Alarm malfunction.J'' will be displayed.

Furthermore, when the gas is not used for a long period of time, such as at night or when the user is away from home, when the close button 11 of the control mechanism 8 is depressed, the shutoff valve mechanism 5 is held closed for 5 minutes and a pressure test is performed. If the gas pressure has not decreased, the valve remains closed, and thereafter the open button 10 can be operated normally.

On the other hand, if the pressure test shows that the gas pressure has decreased, the valve will remain closed and no further opening operation will be possible. Next, when using gas in the morning, etc., the warning lamp flashes and the opening operation becomes impossible, so if you press the reset button 12 of the control mechanism 8, the gas pressure will drop and gas leak as described above. Since a sound is displayed when the alarm detects a gas leak or in response to other abnormal conditions from the outside, the user can immediately check the state of the gas accident by sound, and the user can identify the cause of the gas accident. can be easily eliminated.

(Effects of the Invention) As is clear from the above, the present invention has the following excellent effects.

In other words, it is extremely superior in terms of safety by preventing accidents caused by gas due to a drop in gas pressure, gas leaks, or other causes, and is furthermore effective not only in abnormal conditions but also in normal conditions. Since the system also displays a voice corresponding to the situation, the user can easily take measures and the handling is also extremely simple, thereby providing a gas accident prevention system with practical value. There are effects such as being able to.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic explanatory diagram of the gas accident prevention system according to the present invention, and FIG. 2 is a detailed explanation explaining the details of the operation of the gas accident prevention system according to the present invention. 3 are cross-sectional views showing the shutoff valve mechanism of the gas accident prevention system according to the present invention. DESCRIPTION OF SYMBOLS 1... Gas supply source, 2... Flow path, 4... Pressure sensor, 5... Shutoff valve mechanism. 8... Control mechanism, 10... Open button, 11... Close button, 12... Reset button. 15...downstream side. Patent applicant Kitazawa Valve Co., Ltd. Figure 1 19 lb

Claims (1)

[Claims] A cutoff valve mechanism with a built-in pressure sensor is provided near the flow path of the gas supply source, a control mechanism is provided to control abnormal signals such as a pressure detection signal and a gas leak detection signal of the cutoff valve mechanism, and the control mechanism The shut-off valve mechanism is opened for a predetermined period of time by operating the open button of the shut-off valve mechanism, gas is sealed in the downstream side of the shut-off valve mechanism, and then the shut-off valve mechanism is closed, and the gas pressure is inspected for a predetermined period of time to confirm that the gas pressure has decreased. If not, the valve will open and a response state sound will be displayed, and if the gas pressure is decreasing, the valve will remain closed and a response state sound will be displayed.
When the control mechanism receives a gas leak or other abnormal signal, the shut-off valve mechanism is closed and an audio message indicating the corresponding state is displayed.Furthermore, when the close button of the control mechanism is operated, the shut-off valve mechanism is closed and the shut-off valve mechanism is closed for a predetermined period of time. If the gas pressure is not decreasing, the valve is kept closed, and if the gas pressure is decreasing, the valve is kept closed and an alarm is issued, and when the reset button of the control mechanism is operated, the gas pressure decreases. A gas accident prevention system characterized in that a control mechanism that receives a gas leak or other abnormality signal displays an audio message indicating the response state.