JPH0827471A - Auxiliary device for supply of city gas - Google Patents

Abstract

PURPOSE:To provide an auxiliary device for supply of city gas, capable of improving the performance for gas supply to a unit building without exchanging a gas supply inner pipe. CONSTITUTION:This auxiliary device 5 for supply of city gas is set parallelly to a gas supply inner pipe 3 branched from the city gas main branch pipe 1 for supplying city gas to a unit building 9. The auxiliary device 5 for supply of city gas involves an inlet side pipe 11 branched from the supply inner pipe 3, an inlet side valve 13 attached to the inlet side pipe 11, a compressor 15 set on the downstream side from it, a tank 17 for storing pressurized gas, a pressure-reducing valve 19 attached on the downstream side from it, an outlet side pipe 23 joining the gas supply inner pipe set on the downstream side from it and an outlet side valve 21 attached to the outlet side pipe 23. Further, this auxiliary device is equipped with a controller 25 for controlling the compressor 15 and the above-mentioned respective valves according to a gas flow rate signal sent from a gas meter 7 of the gas supply inner pipe 3. Even in the case where the amount of used gas at peak hours is beyond the ability of the gas supply inner pipe, demand of gas can be made up for supplying gas from this auxiliary device for supply of city gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a city gas supply auxiliary device for assisting gas supply at the peak usage of city gas supplied to each consumer such as a general household or a factory.

[0002]

2. Description of the Related Art FIG. 2 is a diagram showing an outline of current supply facilities for city gas to buildings. From gas main pipe 1 buried underground such as roads to each customer's building (condominium 9)
A gas is supplied to the gas supply pipe 3 through the gas supply pipe 3. Service pipe 3
A gas meter 7 is attached to this to detect the flow rate of gas flowing in the service pipe 3. When entering the housing complex 9, the service pipe is further branched for each house, and the gas is finally supplied to the terminal gas equipment of each consumer through the indoor piping.

[0003]

In such a city gas supply facility, since the service pipe is designed according to the gas consumption of the gas equipment at the time of building planning, the customer may need to remodel or replace the equipment. Considering the increase in gas consumption in the entire building when the capacity of the terminal gas equipment is increased, there is a risk that the current supply pipes will lack the amount of gas supplied. Replacing the service pipe costs a lot of money, and since it is often buried, it is often difficult to dig and reconnect the pipe at present.

An object of the present invention is to provide a city gas supply auxiliary device capable of improving the gas supply capacity to a unit building without replacing the gas service pipe.

[0005]

In order to solve the above-mentioned problems, the city gas supply auxiliary device of the present invention is provided in parallel with a gas supply pipe branched from a city gas main branch supplying city gas to a unit building. A city gas supply auxiliary device; an inlet pipe branched from a domestic pipe, an inlet valve provided in the inlet pipe, a compressor provided downstream of the inlet valve, and gas pressurized by the compressor A tank that stores the gas, a pressure reducing valve that is provided downstream of the tank, an outlet pipe that joins the gas supply pipe that is provided downstream of the pressure reducing valve, and an outlet valve that is provided in the outlet pipe. A control means for receiving a gas flow rate signal from the gas meter of the inner tube and controlling the compressor and each of the above valves is provided.

[0006]

[Operation] When the amount of gas used in a unit building is low,
Gas is stored in the tank of the city gas supply auxiliary device by boosting pressure with a compressor. Then, when the amount of gas used in the unit building increases (peak time), the gas in the tank is depressurized and supplied to the service pipe in front of the gas meter. Therefore,
Even when the peak gas usage exceeds the capacity of the service pipe, the gas demand can be supplemented by the gas supply from the city gas supply auxiliary device.

[0007]

Embodiments of the present invention will be described below. Figure 1
It is a figure showing an outline of gas supply equipment which has a city gas supply auxiliary device concerning one example of the present invention. City gas is sent from the gas main branch pipe 1 through the gas service pipe 3 into the housing complex 9. The city gas supply auxiliary device 5 is provided in parallel (bypass) with the service pipe 3.

The city gas supply assisting device 5 includes a pipeline extending from the inlet pipe 11 to the outlet pipe 23 and the compressor 1 on the pipeline.
5, the tank 17, the pressure reducing valve 19 and other devices. The inlet pipe 11 is branched from the service pipe 3 and is provided with an inlet valve 13. The inlet valve 13 is an electric opening / closing valve and is opened / closed by a signal from the control means 25. The compressor 15 provided downstream of the inlet valve 13 pressurizes the gas (for example, 200 mmAQ → 9 kg).
f / cm ² ) and send to tank 17. Compressor 15
Is also operated by a command from the control means 25. The tank 17 stores the gas pressurized by the compressor 15.

A pressure reducing valve 19 is provided downstream of the tank 17. The pressure reducing valve 19 reduces the high pressure gas stored in the tank 17 to a normal city gas supply pressure. An outlet valve 21 is provided downstream of the pressure reducing valve 19. The outlet pipe 23 downstream of the outlet valve 21 joins the service pipe 3 before the gas meter 7.

Control means 25 of the city gas supply auxiliary device 5
However, when the signal from the gas meter 7 detects that the amount of gas used in the housing complex 9 has exceeded a predetermined value, the outlet valve 21 is opened and the gas in the tank 17 is supplied while the pressure is reduced by the pressure reducing valve 19. Supply to the housing complex 9 side through a pipe. At this time, the inlet valve 13 is closed and the compressor 15 is not operated.

On the other hand, the tank 17 is replenished with gas at the timing (eg at night) when the amount of gas used in the housing complex 9 falls below a predetermined value. At this time, the inlet valve 11 is opened and the compressor 15 is operated. The gas pressure in the tank 17 can be constantly grasped by the control means 25 by a pressure gauge (not shown). Then, when the pressure in the tank 17 reaches the specified value, the operation of the compressor 15 is stopped and the inlet valve 13 is closed.

[0012]

As is apparent from the above description, the city gas supply auxiliary device of the present invention exhibits the following effects. It is possible to increase the gas supply capacity (peak gas usage) for a unit building without exchanging the gas service pipe. Since a large amount of construction cost is required for the exchange work of the service pipe, it is often cheaper to install the city gas supply auxiliary device of the present invention. Further, the gas must be stopped at the time of construction, but the installation time of the city gas supply auxiliary device of the present invention is extremely short.

In some cases, due to the lack of capacity of the supply pipe, each customer may not be able to upgrade the capacity of gas equipment, replace it, or reform (floor heating, etc.). Such a situation can be resolved.

[Brief description of drawings]

FIG. 1 is a diagram showing an outline of gas supply equipment having a city gas supply auxiliary device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an outline of a current supply facility of city gas for a building.

[Explanation of symbols]

1 Gas Main Pipe 3 Gas Service Pipe 5 Gas Supply Auxiliary Device 7 Gas Meter 9 Apartment House 11 Inlet Pipe 13 Inlet Valve 15 Compressor 17 Tank 19 Pressure Reducing Valve 21 Outlet Valve 23 Outlet Pipe 25 Control Means

Claims (1)

[Claims] 1. A city gas supply auxiliary device provided in parallel with a gas service pipe branching from a city gas main branch for supplying city gas to a unit building; an inlet side pipe branching from the service inner pipe, An inlet valve provided in the side pipe, a compressor provided downstream of the inlet valve, a tank for storing gas pressurized by the compressor, a pressure reducing valve provided downstream of the tank, and a downstream of the pressure reducing valve. Control means for receiving the gas flow rate signal from the outlet pipe provided on the outlet pipe, the outlet valve provided on the outlet pipe, and the gas meter of the outlet pipe, and controlling the compressor and each of the above valves. A city gas supply auxiliary device, comprising: