JPH0424302Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a gas replacement confirmation tool for confirming that gas has been replaced after gas piping work or gas plug replacement work at the end of the piping.

[Prior art] This year, in order to prevent gas leak accidents due to gas pipes falling off, a so-called fuse mechanism was installed on the gas valve attached to the end of the pipe, which automatically prevents gas from flowing if an excessive flow of gas flows. There is an increasing number of projects being carried out to replace the existing gas valves with gas valves.

In this way, when replacing the gas valve at the piping terminal or gas piping, or when constructing a branch of the gas piping from the main pipe, it is necessary to check the piping main valve and the piping terminal before performing the equipment combustion test after construction for the following reasons. The air in the piping between the gas valve and the gas valve must be replaced with gas.

After construction, if a conventional combustion device capable of continuous ignition is simply connected to the gas valve at the end of the newly installed pipe in its previous state, and an ignition source is provided by the ignition operation, the gas valve at the main valve and the end of the pipe will be The air in the piping between the gas valve and the gas being sent are mixed in the piping to the combustion equipment, so
There is a risk of abnormal ignition.

This abnormal ignition is accompanied by explosive noise and blast waves, so depending on the type of combustion equipment, it may have a negative impact on the combustion equipment. It is.

If you are an inexperienced member of the public other than the workers, the abnormal ignition accompanied by the loud noise and blast may make you feel uncomfortable.

In particular, in the case of LPG, the specific gravity is high and it tends to stagnate, so there is a risk of explosion and it is dangerous, so it is not possible to open the gas valve at the end of the pipe and release the gas into the room. .

Therefore, in the past, in order to completely replace the air between the main valve of the pipe and the gas valve at the end of the pipe with gas, and to ensure normal and safe ignition, which was the state before construction, A low-pressure hose was connected to the gas valve, and the low-pressure hose was led outside to release the gas.

《Problem to be solved》 In conventional gas replacement work, which connects a low-pressure hose to the gas valve at the end of the piping and leads this low-pressure hose to the outdoors to release gas, it is difficult to When the pressure is large, a large number of low-pressure hoses are required, and it often takes time to extract and store the low-pressure hoses. In addition, in this case, not only the gas in the pipe between the main valve and the gas valve at the end of the pipe must be replaced, but also the gas in the long low-pressure hose, which takes even more time. As a result, the overall work efficiency will decrease. Moreover, there was a problem in that it was not possible to reliably detect whether or not the replacement had been completed.

<Means for solving the problem> The present invention provides a device that can easily and reliably detect replacement indoors.
For this purpose, an inlet valve is placed in the gas inflow path to the burner, and two flow path on-off valves that can be switched are placed in parallel and communicated with this inlet valve, and each flow path on-off valve is operated in the event of the same abnormality. A continuous igniter is connected to the burner via a shutoff valve, and a continuous igniter is disposed at the flame port of the burner. The present invention is characterized in that the continuous ignition controller is configured to continuously operate the ignition based on the opening operation of the valve.

<<Operation>> In the gas replacement confirmation tool of the present invention, a continuous type igniter is placed at the burner mouth, and the continuous type igniter is ignited in conjunction with the opening operation of the flow path opening/closing valve. Therefore, by opening the flow path opening/closing valve, the continuous type igniter continuously performs the ignition operation. Even if the gas concentration in the released gas increases and the gas starts to burn, the combustion status can be visually checked, so the gas can be stagnated indoors until it reaches normal combustion status. The flow path opening/closing valve can be kept open without any trouble.

In addition, by arranging the inlet valve in the gas inflow path, communicating with it, and arranging two flow path on-off valves that can be switched in parallel, it is possible to operate two flow path on-off valves at the same time or one at a time. It is possible to open the valve in stages, and furthermore, the flow rate can be adjusted with the inlet valve, so if the gas valve at the end of the piping is a fuse, it can be used in combination with the inlet valve and two flow path opening/closing valves. As a result, a larger outflow flow rate can be set within the flow rate range below the operating flow rate of the fuse mechanism. Therefore, gas can be quickly replaced without operating the fuse mechanism.

《Example》 Fig. 1 is a diagram schematically showing an example of the gas replacement confirmation device of the present invention, where 1 is a burner, 2 is a flow path opening/closing valve that can be switched, and the flow path can be opened and closed. The valve 2 is composed of a double valve in which two valves are arranged in parallel, and the flow path opening/closing valve 2 and the burner 1 are connected to an abnormality shutoff valve 3 configured to shut off the flow path in the event of an abnormality such as overheating or overturning. It is connected via.

A discharge terminal 5, which is a continuous type igniter, is arranged at the tip end of the burner 1 and is configured to emit sparks between the burner 1 and the burner 1. Two switches 7 and 8 are installed in series in the control circuit of the continuous discharge controller 6, which is a continuous ignition controller that supplies power to the discharge terminal 5. The second switch 8 is configured to switch the circuit on and off in conjunction with the switching operation of the valve operating tool 9, and the second switch 8 is configured to shut off the control circuit in conjunction with the abnormality detection operation of the abnormality shutoff valve 3. There is. Therefore, this continuous discharge controller 6 causes continuous discharge from the discharge terminal 5 when the flow path opening/closing valve 2 is in the open state and the abnormality closing valve 3 is inoperative. Further, a filter such as a wire mesh is interposed in the gas flow path in order to prevent transmission of back flame.

In the figure, numeral 10 is a fuse stock, 11 is a rubber hose for connection, 12 is an inlet valve of a gas replacement confirmation tool, 1
3 is a power source battery for the continuous discharge controller 6.

In addition, a gas supply device is provided in place of the continuous discharge controller 6 to form a continuous ignition controller, and the burner 1
A gas nozzle may be disposed in the flame port 4 to form a continuous igniter, and a pilot flame may be ignited through this gas nozzle.

In the gas replacement confirmation tool having the above configuration, the ignition operation is performed continuously at the flame port 4 of the burner 1, so that the gas that has been expelled from the gas main pipe from the main valve to the fuse tank 10 is removed. When the gas reaches a certain concentration, it will automatically ignite and burn. When the gas main pipe section is completely replaced with gas, combustion becomes stable, so the degree of replacement can be easily determined by visually checking the combustion state.

In addition, an inlet valve 12 is provided in the gas inflow path to the burner 1.
The structure is composed of a dual valve in which two flow path opening/closing valves 2 are placed in parallel and communicated with this and can be switched.
After the connection rubber hose 11 is connected to the inlet valve 11, the flow path opening/closing valves 2 can be opened two at the same time or one at a time in stages, and the inlet valve 12 can further adjust the flow rate.

In other words, first, the inlet valve 12 is fully opened, one flow path opening/closing valve 2 is opened, and when the fuse mechanism is activated, the inlet valve 12 adjusts the flow rate to less than the operating flow rate of the fuse mechanism, and conversely, the fuse mechanism is activated. When the inlet valve 12 is not in operation, the inlet valve 12 remains fully open, and then the two flow path opening/closing valves 2 are opened at the same time, and if the fuse mechanism is activated at this time, the inlet valve 1 is opened as in the case of only one.
If the fuse mechanism does not operate even if the flow rate is adjusted to less than the operating flow rate of the fuse mechanism in step 2 and both valves are opened at the same time, leave the inlet valve 12 fully open and open both flow path opening/closing valves 2. Gas replacement can be performed in that state.

By the above operations, the flow rate can be set so that the flow rate is less than the operating flow rate of the fuse mechanism and reaches the maximum flow rate. In other words, although the flow rate of the flow path opening/closing valve is less than the operating flow rate of the fuse mechanism, it is possible to obtain the maximum outflow flow rate within the range of less than the operating flow rate, making it possible to quickly replace gas. Become.

<<Effects>> As described above, in the present invention, a continuous type igniter is arranged at the flame port of the burner, and this continuous type igniter is activated based on the opening operation of the flow path opening/closing valve to the burner. Since it is configured as follows, it automatically ignites when the gas concentration of the pushed out gas exceeds a certain level, and by visually checking the combustion state, it is possible to accurately know the degree of gas replacement.

Furthermore, since the gas component that leaks out during replacement is combusted, the gas component does not stagnate in the work area and is safe.

Furthermore, if the gas valve at the end of the piping is a fuse, an inlet valve is placed in the gas inflow path to the burner, and two flow path on-off valves that are connected to this and can be switched are placed in parallel. By configuring the dual valves, it is possible to open the flow path opening/closing valves simultaneously or one by one in stages, and furthermore, it is possible to adjust the flow rate using the inlet valve, so there is no fuse The maximum outflow flow rate can be set in a range below the operating flow rate of the mechanism. Therefore, gas replacement can be quickly performed without operating the fuse mechanism.

Even if the gas valve at the end of the piping is a regular gas valve, by combining the inlet valve and two flow path opening/closing valves, it is possible to maintain a maximum flow rate that is not dangerous for visually checking the gas combustion state. gas replacement can be performed by setting the flow rate to .

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram, and FIG. 2 is an ignition circuit diagram. DESCRIPTION OF SYMBOLS 1... Burner, 2... Flow path opening/closing valve, 3... Abnormality closing valve, 4... Flame opening part of 1, 5... Continuous type igniter, 6... Continuous ignition controller.

Claims (1)

[Claims for Utility Model Registration] 1. An inlet valve 12 is disposed in the gas inflow path to the burner 1, and two flow path opening/closing valves 2 that are communicatively connected to the inlet valve 12 and can be switched are disposed in parallel, and each The flow path opening/closing valve 2 is connected to the burner 1 via the abnormality closing valve 3, and a continuous igniter 5 is disposed in the flame port 4 of the burner 1. and the flow path opening/closing valve 2 are interlocked and connected,
A gas replacement confirmation tool characterized in that the continuous ignition controller 6 is configured to continuously operate the ignition based on the opening operation of the flow path opening/closing valve 2. 2. The gas replacement confirmation tool according to claim 1, wherein the continuous ignition controller 6 is a continuous discharge controller.