JP2532844B2 - Gas accident prevention system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a gas accident prevention system used for LP gas, city gas, etc., and particularly, memorizes a minute leak phenomenon in an inspection after valve closing by voice. However, the present invention relates to a gas accident prevention system that employs a feedback system in which a stored voice is displayed by a subsequent operation to confirm an abnormal phenomenon by voice when the user is absent.

(Prior art and its problems) Recently, gas leak prevention measures and safety equipment have been widely spread in the gas consumption market, and among them, gas leak alarm cutoff devices and pressure / flow rate detection cutoff devices are receiving attention. .

Conventionally, in this kind of equipment, the gas main plug is artificially tightened by an alarm of a gas leak alarm, and a gas overflow is prevented by a fuse cock.
In addition, a shutoff device linked to a gas leak alarm and a gas pressure drop shutoff device with a built-in pressure sensor have been commercialized. However, all the devices have a complicated structure, and the handling by the user is extremely troublesome, and malfunctions also occur. Since it often happens, there is a problem in safety, and since it also raises the cost of the equipment, it is the fact that it is not popular in general, development of gas accident prevention system equipment of practical value Was expected.

In view of the above conventional problems, the present invention has been researched and developed in order to meet the demands of the market, and prevents accidents due to causes such as a decrease in gas pressure and gas leakage, and makes the handling extremely simple. Abnormality at the time of closing the valve, especially by recording the minute leak phenomenon in the inspection after closing the valve by voice and displaying the stored voice by the subsequent operation to check the abnormal phenomenon by voice The purpose is to eliminate the cause immediately and prevent a gas accident.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a shutoff valve having a built-in pressure sensor in the vicinity of a flow path of a gas supply source, and a pressure detection signal or gas for the shutoff valve. In a gas accident prevention system that has a CPU that controls each circuit by inputting data from each circuit such as a leak detection signal, when the gas is not used, the closing switch that closes the shutoff valve operates the CPU through the CPU. The output signal of the valve closing pulse to the electromagnetic part of the shutoff valve to close the valve, and in this closed state, the pressure on the secondary side of the shutoff valve is inspected for a predetermined time, and a gas pressure drop is detected within the predetermined time. When the valve closed state is locked, the audio signal of the corresponding phenomenon state is stored via the CPU and the alarm lamp is displayed, and further, an abnormal signal other than the gas pressure drop signal is stored via the CPU. Also display the alarm lamp, When the gas is used while the alarm lamp of is continuously displayed, the voice signal stored via the CPU is output by the voice synthesis LSI by operating the reset switch and the voice of the corresponding phenomenon is output. It is configured to display and confirm the response accident.

(Operation) According to the present invention, when the closing switch is pressed after using gas, for example, a valve closing pulse is output from the CPU and input to the electromagnetic portion of the shutoff valve to close the shutoff valve, and the shutoff valve is closed for a predetermined time (for example, 5 The pressure sensor on the secondary side is inspected by the pressure sensor built into the shutoff valve. In this case, when the gas pressure drop is not detected, the valve closed state is maintained as it is, and then the normal open switch operation becomes possible. On the other hand, in this case, when the gas pressure drop is detected, the valve closed state is maintained by the control of the CPU that receives the pressure drop signal of the pressure sensor,
At the same time, the opening operation is disabled, and the voice signal of the gas pressure drop is stored in the CPU. In this valve closed state, abnormal signals other than the gas pressure drop signal are also stored under the control of the CPU.

After that, when the reset switch is pressed, the stored voice signal is output and the voice of the corresponding phenomenon is fed back and displayed, so that the state of the gas accident at the time of absence etc. can be immediately confirmed by voice. You can
It is possible to reliably eliminate the cause of the abnormality.

(Embodiment) The drawings show an embodiment of the present invention. FIG. 1 is a schematic explanatory view of a gas accident prevention system according to the present invention.
FIG. 3 is a detailed explanatory view illustrating details of the operation of the gas accident prevention system according to the present invention, FIG. 3 is a block diagram illustrating a control circuit, and FIG. 4 is a cross section showing a cutoff valve of the gas accident prevention system according to the present invention. It is a figure.

In FIG. 1, at a position near a gas meter 3 of a flow path (pipe) 2 of a gas supply source 1 such as an LP gas cylinder or city gas,
A shutoff valve 5 with a built-in pressure sensor 4 and an electromagnetic portion is provided outdoors. A pipe 6 on the downstream side of the shutoff valve 5 is connected to a gas combustor 7 such as an indoor gas stove, a gas burner, a gas stove or the like.

Reference numeral 8 denotes a control device for controlling the opening / closing of the shutoff valve 5. The control device 8 electrically connects with a disaster prevention device 9a such as a gas leak alarm 9 or a seismoscope or a fire alarm as shown in FIG. It is connected and placed on the indoor wall. In addition, this control device 8
Inside the CPU, as shown in the block diagram of FIG.
Each circuit is built around the (microprocessor) 14.

In the figure, reference numeral 15 is a speech synthesis LSI.
Reference numeral 15 is for outputting an audio signal in response to a signal from the CPU 14, which amplifies this signal by an AMP 16 and drives a speaker 17 to display an audio. The display circuit 13 displays the open / closed state and the alarm state of the shutoff valve 5 by light emitting diodes (power lamp 13a, fully open lamp 13b, fully closed lamp 13c, and alarm lamp 13d) according to the energization state of the control device 8 and the signal from the CPU 14. . Open switch 10, close switch 11, reset switch 12
Is a switch for opening / closing the shutoff valve 5 and for returning the alarm state. In addition, 18 is a solenoid valve drive circuit, 19 is a voltage detection circuit, 20 is an input signal detection circuit, and 21 is an alarm interlocking output circuit.

Next, the internal structure of the shut-off valve 5 shown in FIG. 4 will be explained. The electromagnetic portion is attached to the valve body 24 having the upstream side 22 and the downstream side 23.
25, the valve section 27 provided with the diaphragm 26 is opened / closed by the opening / closing pulse from the control device 8, the pressure sensor 4 is provided on the detection path 28 provided on the downstream side 23, and the detection signal of this pressure sensor 4 is sent to the control device. 8 to the CPU 14 to automatically open and close the shutoff valve 5 by a control signal. Further, the shutoff valve 5 is provided with a manual operation section 29 so that it can be manually operated.

FIG. 2 and FIG. 3 are a detailed explanatory view explaining the details of the operation of the gas accident prevention system in this embodiment and a block diagram showing the control circuit. In the figure, when gas is used and the open switch 10 is pressed, a valve open pulse is once output from the CPU 14 and input to the electromagnetic section 25 of the shutoff valve 5 via the solenoid valve drive circuit 18 to shut off the shutoff valve. 5 is opened, and a voice signal is output from the voice synthesis LSI 15 in response to a signal from the CPU 14, and voice is displayed. Then, after 5 seconds, the CPU 14
Output a valve closing pulse to close the shutoff valve 5 to seal the gas in the downstream side 23 of the shutoff valve 5, and then for 10 seconds, inspect the gas pressure by the pressure sensor 4 built in the shutoff valve 5, When the pressure drop is not detected, a signal is sent to the CPU 14 to open the valve by the output of the valve opening pulse, and at the same time, the voice signal is output from the voice synthesis LSI 15 and the voice phrase is displayed, and the gas can be used. When it detects a state where it drops below a certain value, the CPU14 keeps the valve closed state without outputting the valve opening pulse and locks it, and at the same time the alarm lamp 13d blinks and the voice signal from the voice synthesis LSI15 is output. The sound is output and the sound is displayed.

While the shut-off valve 5 is open, the gas pressure continuously drops for 2 seconds due to, for example, the combustor 7 being extinguished or the pipe cracking, and the gas leak alarm 9 continuously leaks gas for 40 seconds. When it detects that, or when it receives an external signal from the disaster prevention equipment 9a, it shuts off the shutoff valve 5 instantaneously by the control of the CPU 14 or closes the valve after a predetermined time and makes the alarm lamp 13d blink, and at the same time the sound of the corresponding phenomenon is output. Is displayed.

Further, when the gas is not used for a long time, such as at night or when absent, first, when the closing switch 11 is pressed, a valve closing pulse is output from the CPU 14 and input to the electromagnetic section 25 of the shutoff valve 5. To close the valve. In this state, the secondary side pressure inspection is performed for 5 minutes. In this case, when the pressure sensor 4 does not detect the gas pressure drop, the valve closed state is maintained as it is, and then the normal open switch operation becomes possible.

On the other hand, when the gas pressure drop is detected, the valve closed state is maintained by the control of the CPU 14, the alarm lamp 13d blinks, the voice signal of the gas pressure drop is stored, and the subsequent opening operation becomes impossible. Next, when using gas in the morning or when returning home, the alarm lamp 13d is displayed, so that an abnormal state can be confirmed. In this case, since the opening operation is impossible, the control device 8 is reset. When the switch 12 is pressed, the voice signal of the stored gas pressure drop is output from the voice synthesis LSI 15, and the voice "Gas leak. Please check" is fed back and displayed. Furthermore,
In this case, the gas leak detection signal of the gas leak alarm or the signal of the state corresponding to other abnormal condition from the outside is CP.
Since the voice of the phenomenon that has been input to U14 is stored, the stored voice is fed back and displayed, and the state of a gas accident that occurred during absence etc. can be immediately confirmed by voice. Since the user can easily eliminate the cause of the gas accident according to the voice display, the gas accident can be prevented in advance.

(Effects of the Invention) As is clear from the above, according to the present invention, there are the following excellent effects.

That is, accidents due to a decrease in gas pressure or gas leakage are prevented in advance, handling is extremely simple, and in particular, a minute leak phenomenon in the inspection after the valve is closed is memorized by voice and stored by subsequent operations. You can check the abnormal phenomenon when you are not present by voice by displaying the voice that is present, so you can immediately eliminate the cause of the abnormality when closing the valve and prevent gas accidents.
It is extremely safe and has the effect of providing a gas accident prevention system of practical value that employs a feedback system that can display all abnormalities such as when there is no voice.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic explanatory view of a gas accident prevention system according to the present invention, and FIG. 2 is a detailed explanation for explaining details of operation of the gas accident prevention system according to the present invention. 3 and 4 are block diagrams for explaining the control circuit, and FIG. 4 is a sectional view showing a shutoff valve of the gas accident prevention system according to the present invention. 1 ... Gas supply source, 2 ... Flow path, 4 ... Pressure sensor, 5
...... Shut-off valve, 8 ...... Control device, 10 ...... Open switch, 11 ...
… Closed switch, 12 …… Reset switch, 13 …… Display circuit, 14 …… CPU, 15 …… Voice synthesis LSI, 18 …… Solenoid valve drive circuit, 23 …… Downstream side, 25 …… Electromagnetic section.

Claims (1)

(57) [Claims] 1. A shutoff valve having a built-in pressure sensor is provided in the vicinity of a flow path of a gas supply source, and data from each circuit such as a pressure detection signal of the shutoff valve and a gas leak detection signal is input to each circuit. In a gas accident prevention system provided with a CPU to control, when a gas is not used, an output signal of a valve closing pulse is input to the electromagnetic section of the shutoff valve via the CPU by operating a closing switch that closes the shutoff valve. Then, the pressure on the secondary side of the shut-off valve is inspected for a predetermined time in this closed state, and when a gas pressure drop is detected within the predetermined time, the closed state is locked and the audio signal of the corresponding phenomenon state is output. The alarm lamp is also displayed while being stored via the CPU, and further, an abnormal signal other than the gas pressure drop signal is stored via the CPU and the alarm lamp is also displayed, and the alarm lamp is continuously displayed. Use gas in the state In this case, the gas accident prevention system is characterized in that the voice signal stored through the CPU is output by the voice synthesis LSI by operating the reset switch and the voice of the corresponding phenomenon is displayed to confirm the corresponding accident. .