JP4593810B2 - Gas temporary supply device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a temporary gas supply apparatus provided in an existing gas supply facility that supplies gas from a gas storage tank such as a bulk storage tank for LP gas to a consumer device via piping equipment.
[0002]
[Prior art]
In recent years, bulk supply of LP gas by bulk storage tanks has begun to spread. The bulk supply of LP gas is a method different from the conventional container supply method that delivers containers filled with LP gas and collects empty containers, and is a lorry vehicle for gas storage tanks installed at the eaves of ordinary households. It is a supply system that fills with LP gas.
The bulk storage tank for bulk supply as described above is required to be provided with various safety devices to avoid danger.
[0003]
[Problems to be solved by the invention]
As a result of the safety device provided in the bulk storage tank being added mainly to the valve installed in the bulk storage tank, the valve has to have a complicated structure. For this reason, dust contained in the gas is trapped in the valve, and a trouble that the function of the valve and the function of the safety device cannot be fully exhibited is likely to occur.
Further, a liquid level gauge as one of safety devices is added to the bulk storage tank. The liquid level gauge also has a trouble that the float drive unit does not operate.
In the present specification, valves, safety devices, liquid level gauges, regulators, and the like are referred to as accessory devices, and valves, regulators, and the like through which gas flows out of the accessory devices are referred to as piping devices.
[0004]
When any of the above problems occurs, repair (including replacement) of auxiliary equipment such as valves, safety devices, and liquid level gauges in the bulk storage tank with the gas supply from the bulk storage tank to the consumer equipment stopped. It will be. Therefore, there is a problem that the gas supply must be stopped for a long time.
[0005]
The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is to shorten the time for stopping the supply of gas when repairing the accessory of the gas storage tank. It is to provide a temporary gas supply device and an existing gas supply facility.
[0006]
[Means for Solving the Problems]
The above-mentioned problem can be solved by a gas temporary supply method and existing gas supply facilities having the structure described in the claims.
That is, according to the gas temporary supply device described in claim 1, when repairing the auxiliary equipment of the gas storage tank, the gas in the gas storage tank is supplied to the consuming equipment by selecting the bypass pipe by the pipe switching device. To consume. Then, the gas in the temporary container can be supplied to the consumer device by selecting the temporary supply pipe with the pipe switching device. While the gas in the temporary container is being supplied, the accessory device of the gas storage tank may be repaired.
Therefore, when repairing the auxiliary equipment of the gas storage tank, the gas can be continuously supplied to the consuming equipment, so that the time for stopping the supply of the gas can be shortened.
[0007]
Moreover, according to the gas temporary supply apparatus described in claim 2, since the pipe switching device is an automatic switching regulator, the gas pressure flowing in the bypass pipe becomes a predetermined value or less when the bypass pipe is selected. When this happens, the system automatically switches to a state in which a temporary supply pipe is selected. Therefore, the trouble of switching the pipe switching device can be saved.
[0008]
Moreover, according to the existing gas supply equipment described in claim 3, the pipe switching device can be easily equipped to the stay member provided in the gas storage tank. Therefore, it is possible to shorten the work time required for installing the pipe switching device.
[0009]
Further, according to the existing gas supply facility described in claim 4, the secondary side pipe of the pipe switching device can be easily connected to the joint member provided in the existing gas supply pipe that connects the piping equipment and the consuming equipment. can do. Accordingly, it is possible to shorten the work time required for connecting the secondary side pipe of the pipe switching device.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described. This embodiment illustrates a bulk storage tank as an example of a gas storage tank. FIG. 3 shows a partially broken front view of the existing gas supply equipment.
As shown in FIG. 3, the bulk storage tank 20 is formed so as to be filled with, for example, LP gas. As will be described in detail below, the bulk storage tank 20 is provided with various accessory devices and a protector 22 that covers the accessory devices.
[0011]
The bulk storage tank 20 is installed in a fixed state at an eaves or the like of a general household.
On the upper surface of the bulk storage tank 20, a multi-valve 24, a liquid level gauge 26, a pressure regulator 10, a safety valve 30 with a discharge pipe, a liquid take-off valve 32, etc., are provided.
[0012]
The multi-valve 24 is a well-known one and includes the first gas extraction valve 12, the second gas extraction valve 13, the filling port 25, the overfilling prevention device 27, and the like as a unit.
The bulk storage tank 20 is filled with LP gas from a bulk lorry vehicle (not shown) through the filling port 25.
The first gas extraction valve 12 is connected to the pressure regulator 10.
The second gas extraction valve 13 is a valve used when collecting the residual liquid in the bulk storage tank 20. A pressure equalizing valve 13 a is connected to the second gas extraction valve 13. When the first gas extraction valve 12 is opened, the second gas extraction valve 13 is closed. Conversely, when the second gas extraction valve 13 is opened, the first gas extraction valve 12 is closed.
The overfill prevention device 27 is a device that prevents overfilling of LP gas into the bulk storage tank 20.
[0013]
The liquid level gauge 26 detects the amount of gas in the bulk storage tank 20, and is electrically connected to a predetermined processing circuit, a display unit and the like (not shown).
The pressure regulator 10 is connected to the first gas extraction valve 12 of the multi-valve 24. The pressure regulator 10 reduces the pressure of the high-pressure gas flowing from the bulk storage tank 20 through the multi-valve 24 to a combustible pressure.
[0014]
The safety valve 30 with a discharge pipe functions as an atmospheric pressure release valve for decompression when the LP gas in the bulk storage tank 20 abnormally rises in a fire or the like.
The protector 22 is provided with a substantially cap-shaped lid 23 that closes the discharge pipe 30 a of the safety valve 30 with a discharge pipe and is opened by the gas blowing pressure generated by opening the safety valve 30.
[0015]
A gas supply low pressure pipe 6 is connected to the secondary side (low pressure side) of the pressure regulator 10. The downstream side of the gas supply low-pressure pipe 6 is connected to a consumer device (not shown). The gas supply low-pressure pipe 6 corresponds to the “existing gas supply pipe” in this specification.
[0016]
In the course of piping of the gas supply low-pressure pipe 6, a joint member 2 comprising a pressure gauge 5, a gas venting blow valve 16, a check valve 15, and a three-way joint with a coupling from the upstream side to the downstream side. Is intervened. The pressure gauge 5, the blow valve 16, the check valve 15, and the joint member 2 are disposed in the peripheral portion of the bulk storage tank 20.
The joint member 2 normally has a low-pressure pipe 6 for gas supply connected in series and a connection port 2a connecting a low-pressure hose 3 (described later) is closed.
[0017]
A substantially plate-like stay member 7 is attached to the upper surface of the bulk storage tank 20. The stay member 7 is raised on the upper surface of the bulk storage tank 20 on the side of the protector 22 (left side in FIG. 3). The stay member 7 is formed so that an adjuster attachment plate 8 (described later) can be attached by screws (not shown) or the like.
[0018]
In the above-described existing gas supply facility (see FIG. 3), when troubles occur in the accessory equipment such as the multi-valve 24 and the liquid level gauge 26 of the bulk storage tank 20, repair (including replacement) of the accessory equipment is performed. Will do.
At this time, a gas temporary supply device described in detail below is provided for the above-described existing gas supply facility (see FIG. 3). FIG. 1 is a partially broken front view of an existing gas supply facility provided with a gas temporary supply device, and FIG. 2 also shows a piping diagram.
[0019]
Next, a gas temporary supply apparatus is demonstrated according to the assembly | attachment procedure with respect to the existing gas supply equipment.
(1) As shown in FIG. 1, the adjuster attachment plate 8 is attached to the stay member 7 attached to the bulk storage tank 20 by screws (not shown) or the like.
[0020]
(2) As shown in FIG. 1, a well-known automatic switching regulator 9 with a transmission function (also simply referred to as an automatic switching regulator) is attached to the regulator mounting plate 8.
As is well known, the automatic switching regulator 9 has left and right primary side (high pressure side) connection ports 9a and 9b and a secondary side (low pressure side) connection port 9c. For example, the automatic switching type regulator 9 initially reduces the pressure of the high-pressure gas flowing to the primary side connection port 9b on the right side to a combustible pressure with the handle (not shown) directed to the right in FIG. And flow to the connection port 9c on the secondary side. When the gas pressure flowing to the right primary side connection port 9b becomes a predetermined value or less, the high pressure gas flowing to the left primary side connection port 9a is reduced to a combustible pressure to obtain a secondary pressure. It has a function of automatically switching to a state of flowing to the side connection port 9c. By the switching operation of the automatic switching regulator 9, the direction of the handle (not shown) changes to the left in FIG. 1, and the signal (not shown) changes to “red”.
[0021]
Moreover, since it is the automatic switching type adjuster 9 with a transmission function, it is configured so that the switching status can be received at a management place via a telephone line or the like. The automatic switching type adjuster 9 with a transmission function corresponds to a “piping switching device” in this specification.
[0022]
(3) As shown in FIG. 1, a primary side connection port 9b on the right side of the automatic switching regulator 9 and a pressure equalizing valve 13a in the multi-valve 24 are connected by a second high-pressure hose 11 (FIG. 2). Further, a second valve 17 is interposed in the course of piping of the second high-pressure hose 11 (see FIG. 1).
[0023]
(4) As shown in FIG. 1, the temporary container 1 is disposed near the bulk storage tank 20, for example, near the left side. The temporary container 1 is filled with, for example, LP gas. The temporary container 1 has an attached valve 1a.
[0024]
(5) As shown in FIG. 1, the valve 1a attached to the temporary container 1 and the primary side connection port 9a on the left side of the automatic switching regulator 9 are connected by a first high-pressure hose 4 (see FIG. 1). 2). Moreover, the 1st valve | bulb 14 is interposed in the piping way of the 1st high pressure hose 4 (refer FIG. 1).
[0025]
(6) As shown in FIG. 1, the secondary side (low pressure side) connection port 9c of the automatic switching regulator 9 and the connection port 2a of the joint member 2 provided in the gas supply low pressure pipe 6 are connected. They are connected by a low pressure hose 3 (see FIG. 2).
[0026]
The bulk storage tank 20 is connected to the gas supply low-pressure pipe 6 through the second gas extraction valve 13, the pressure equalizing valve 13a, the second high-pressure hose 11, the automatic switching regulator 9, the low-pressure hose 3, etc. of the multi-valve 24. The piping is referred to as bypass piping (denoted by reference numeral 34) that bypasses piping devices such as the multi-valve 24 and the pressure regulator 10.
Also, the pipe connected to the gas supply low-pressure pipe 6 through the valve 1a attached to the temporary container 1, the first high-pressure hose 4, the automatic switching regulator 9, the low-pressure hose 3, etc. is connected to the temporary supply pipe (reference numeral 36). It is called).
[0027]
As described above, the gas temporary supply device is assembled to the existing gas supply facility.
Thereafter, the handle (reference numeral omitted) of the automatic switching regulator 9 (see FIG. 1) is directed to the second high-pressure hose 11 side. As a result, the bypass pipe 34 is selected from the bypass pipe 34 and the temporary supply pipe 36. At this time, the first valve 14, the second valve 17, and the valve 1a attached to the temporary container 1 are opened.
[0028]
And the gas in the bulk storage tank 20 is supplied to a consumer apparatus through the bypass piping 34 (refer FIG. 1). As a result, the gas in the bulk storage tank 20 is consumed.
Further, with the first gas extraction valve 12 of the multi-valve 24 being closed, the gas in the gas supply low-pressure pipe 6 from the first gas extraction valve 12 to the check valve 15 is blown into the blow valve 16 (FIG. 1). See)).
[0029]
When the gas pressure in the bulk storage tank 20, that is, the gas pressure flowing in the second high-pressure hose 11 (see FIG. 1) becomes a predetermined value or less, the automatic switching regulator 9 is switched and the handle (reference number omitted) is changed. The direction changes to the high pressure hose 4 side of 1 and the signal changes to “red”. Accordingly, the temporary supply pipe 36 (see FIG. 1) is selected from the bypass pipe 34 and the temporary supply pipe 36.
[0030]
Further, the switching status of the automatic switching type adjuster 9 (see FIG. 1) is received at a management place via a telephone line or the like. For this reason, the switching operation of the automatic switching regulator 9 is confirmed at the management place. If the switching operation of the automatic switching regulator 9 is confirmed, the worker rushes from the management place to the repair work place of the accessory device of the gas storage tank 20.
[0031]
And the gas in the temporary container 1 is supplied to a consumer apparatus through the temporary supply piping 36 (refer FIG. 1). On the other hand, the second gas extraction valve 13 and the second valve 17 of the multi-valve 24 are opened, and the second high-pressure hose 11 (see FIG. 1) is removed.
Next, after confirming that the blow valve 16 (see FIG. 1) is closed, the first gas extraction valve 12 of the multi-valve 24 is opened, and there is no pressure in the bulk storage tank 20 by the pressure gauge 5. Make sure. Thereafter, repairs are made to the attached devices such as the multi-valve 24 and the liquid level gauge 26 of the bulk storage tank 20.
When the repair of the attached equipment is completed, the existing gas supply facility described above is restored normally, and then the above-described gas temporary supply device is withdrawn.
[0032]
According to the gas temporary supply device described above, when repairing the auxiliary equipment of the bulk storage tank 20, by selecting the bypass pipe 34 by the automatic switching regulator 9, the gas in the bulk storage tank 20 is supplied to the consumer equipment. Consume (see FIG. 1). Then, the gas in the temporary container 1 can be supplied to a consumer device by selecting the temporary supply pipe 36 with the automatic switching regulator 9. While the gas in the temporary container 1 is being supplied, the accessory device of the bulk storage tank 20 may be repaired.
Therefore, when repairing the accessory device of the bulk storage tank 20, the gas can be continuously supplied to the consuming device, so that the time for stopping the supply of gas can be shortened.
[0033]
Prior to the repair work of the accessory equipment of the gas storage tank 20, the gas in the bulk storage tank 20 is supplied to the consumer equipment through the bypass pipe 34 (see FIG. 1). For this reason, even if piping apparatus, such as the multivalve 24 and the pressure regulator 10, has failed, the gas in the bulk storage tank 20 can be consumed reliably. At the same time, the extraction work for extracting the gas in the bulk storage tank 20 to a specific place can be omitted.
[0034]
In addition, since the pipe switching device is the automatic switching regulator 9, the temporary supply pipe 36 is selected when the gas pressure flowing through the bypass pipe 34 becomes a predetermined value or less in the state where the bypass pipe 34 is selected. The state is automatically switched to the state to be performed (see FIG. 1). Therefore, the trouble of switching the pipe switching device can be saved.
Further, the automatic switching regulator 9 is consumed until the LP gas in the gas storage tank 20 is almost exhausted. For this reason, the process and effort for releasing the LP gas remaining in the gas storage tank 20 are reduced.
[0035]
Further, an automatic switching type adjuster 9 having a transmission function is used, and the switching state can be received at a management place via a telephone line or the like (see FIG. 1). Therefore, after the switching operation of the automatic switching type adjuster 9, the worker can rush from the management place to the repair work place of the accessory device of the gas storage tank 20, so that the repair work can be performed efficiently.
[0036]
Moreover, according to the existing gas supply equipment described above, the automatic switching regulator 9 can be easily equipped on the stay member 7 provided in the bulk storage tank 20 (see FIG. 1). Therefore, it is possible to shorten the work time required for installing the automatic switching regulator 9.
[0037]
In addition, the secondary side pipe of the automatic switching regulator 9, that is, the low pressure hose 3, is connected to the joint member 2 provided in the existing gas supply pipe that connects the piping equipment such as the multi-valve 24 and the pressure regulator 10 and the consumer equipment. It can be easily connected (see FIG. 1). Therefore, it is possible to shorten the work time required for connecting the secondary side piping of the automatic switching regulator 9.
[0038]
In addition, when designing the piping at the time of installing the bulk storage tank 20, devices such as a pressure gauge 5, a blow valve 16, a check valve 15, and a joint member 2 that are necessary for the gas temporary supply device are used for the gas supply low-pressure piping 6 Is incorporated (see FIG. 3). Thereby, the gas temporary supply apparatus can be quickly installed, and the work time required for the installation can be shortened.
Further, by replacing the joint member 2 with a switchable valve or a coupling member with a coupling, the time for stopping the supply of gas when repairing the accessory of the bulk storage tank 20 is reduced to “0”. (Zero) ".
[0039]
The present invention is not limited to the embodiment described above, and can be modified without departing from the gist of the present invention. For example, in the bypass pipe 34 and the temporary supply pipe 36, the automatic switching regulator 9 including the common low-pressure hose 3 is used, but a pressure regulator may be provided in each pipe. In addition, the pipe switching device is not limited to the automatic switching regulator 9 and may be provided so that the gas flowing through the temporary supply pipe 36 or the bypass pipe 34 can be selectively supplied to the consuming equipment. In addition, the second high-pressure hose 11 can be connected to the first gas extraction valve 12 of the multi-valve 24.
[0040]
【The invention's effect】
As described above, according to the present invention, when repairing an accessory device of a gas storage tank, the gas can be continuously supplied to the consuming device, so that the time for stopping the gas supply can be shortened. it can.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of an existing gas supply facility provided with a temporary gas supply device according to an embodiment of the present invention.
FIG. 2 is a piping diagram showing an existing gas supply facility provided with a gas temporary supply device.
FIG. 3 is a front view showing an existing gas supply facility in a partially broken view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Temporary container 2 Joint member 7 Stay member 9 Automatic switching type regulator (pipe switching device)
10 Pressure regulator (Piping equipment, accessory equipment)
20 Bulk storage tank (gas storage tank)
24 Multi-valves (Piping equipment, accessory equipment)
26 Level gauge (accessory equipment)
30 Safety valve with discharge pipe (accessory equipment)
32 Liquid take-off valve (accessory equipment)
34 Bypass piping 36 Temporary supply piping

Claims (4)

A gas temporary supply device provided in an existing gas supply facility for supplying gas from a gas storage tank to consumer equipment via piping equipment,
A temporary container, a temporary supply pipe, a bypass pipe, and a pipe switching device;
The temporary container is filled with gas,
The temporary supply pipe is formed so as to be able to supply the gas of the temporary container to the consumer device,
The bypass pipe is formed so that the gas in the gas storage tank can be supplied to the consumer equipment by bypassing the pipe equipment,
The gas switching supply device, wherein the pipe switching device is provided so as to be able to selectively supply the gas flowing through the temporary supply piping or the bypass piping to the consuming device. The gas temporary supply device according to claim 1,
In the state where the bypass pipe is selected, the pipe switching device is automatically switched to a state where the temporary supply pipe is selected when the gas pressure flowing in the bypass pipe becomes a predetermined value or less. A gas temporary supply device characterized by being a regulator. An existing gas supply facility in which the gas temporary supply device according to claim 1 or 2 is provided,
An existing gas supply facility, wherein the gas storage tank is provided with a stay member that can be equipped with the pipe switching device. An existing gas supply facility in which the gas temporary supply device according to claim 1 or 2 is provided,
An existing gas supply facility, wherein a joint member capable of connecting a secondary side pipe of the pipe switching device is provided in an existing gas supply pipe connecting the pipe device and the consumer device.

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