JPH06241398A - Gas filling equipment - Google Patents

Abstract

PURPOSE:To secure safety and effectively utilize site. CONSTITUTION:As for gas filling equipment which is installed at a gas filling station and constituted so that the high pressure gas comnressed by a compressor 12 is stored in an accumulator 13, and supplied into a dispenser 14 from the accumulator 13, and the high pressure gas is weighed in the dispenser 14 and then supplied, the compressor 12 and the accumulator 13 are arranged in an underground pit 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas filling facility installed at a filling stand for compressed gas, especially high pressure natural gas.

[0002]

2. Description of the Related Art In recent years, use of electricity, methanol, natural gas, etc. as an alternative energy for automobile fuels such as gasoline and light oil has been studied due to environmental energy problems and demands for energy diversification. Of these, natural gas, whose main component is methane gas, is rich in reserves,
It is distributed all over the world and attracts attention as an energy that can be stably supplied over a long period of time, and is used as a main raw material for city gas. This natural gas fueled vehicle runs on compressed natural gas (CNG) filled in an on-board high pressure tank, and is expected to be of great use in reducing air pollution and suppressing global warming. There is.

Conventionally, in a gas filling stand for filling a vehicle with natural gas, natural gas compressed by a compressor is supplied from a pressure accumulator to a dispenser, and the on-vehicle high-pressure tank is filled from the dispenser.

[0004]

By the way, when such a filling facility in a gas filling stand such as CNG is installed on the ground, it is required to comply with the High Pressure Gas Control Law and the Building Standards Law in order to ensure safety. Due to regulations, various distance restrictions are set. For example, the gas filling facility must be separated from the oil storage facility by 20 m or more, and a reinforced concrete having a thickness of 12 cm or more or a barrier having the same or higher strength is required between the compressor and the pressure accumulator.

That is, in the conventional gas filling equipment, there is a possibility that it may be difficult to install it in a necessary place due to the above-mentioned distance limitation or the like, and the effective use of the site may be hindered.

Therefore, an object of the present invention is to provide a gas filling device which can ensure safety and can effectively utilize the site.

[0007]

In order to achieve the above object, the gas filling equipment of the present invention stores high-pressure gas compressed by a compressor in a pressure accumulator, and supplies it from the pressure accumulator to a dispenser. In a gas filling facility installed in a gas filling stand for measuring and supplying, the compressor, the pressure accumulator and the like are arranged in an underground pit.

[0008]

In the gas filling device according to the present invention, the compressor and the pressure accumulator are arranged in the underground pit having a partition between them, so that the safety can be ensured and the gas filling device can be installed on the site more than when it is installed on the ground. It can be effectively used.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in the drawings. FIG. 1 is an overall view for explaining the configuration of a gas filling stand equipped with the gas filling equipment according to the embodiment of the present invention.

In FIG. 1, the gas filling stand of this embodiment includes a pressure regulating tank 11, a compressor 12, and a pressure accumulator 1.
3, a dispenser 14, a control device 15, etc. are provided. Natural gas supplied from an external gas supply source through underground piping or the like is a pressure regulating tank 11 for preventing pulsation of gas pressure.
Is stored in the accumulator 13 as high pressure natural gas having different pressure levels such as 150, 200 and 250 atm, and then compressed by the compressor 12.
Furthermore, it is supplied from the pressure accumulator 13 to the dispenser 14,
An on-vehicle tank (not shown) of an automobile 16 that uses a natural gas as a fuel and is measured by a flow meter provided in the dispenser 14 is filled.

The pressure adjusting tank 11 and the compressor 12
The accumulator 13 is housed in an underground pit 17 having a concrete wall formed by digging down a predetermined ground in the site. The underground pit 17 is divided into two by a barrier 18 having a strength equivalent to that of reinforced concrete having a thickness of 12 cm or more in the substantially central portion thereof, and first and second underground pits 17a and 17b are formed, respectively. . And the pressure regulating tank 11 and the compressor 12 are
Located in the first underground pit 17a, the accumulator 13 is the second
It is located in the underground pit 17b. Further, the dispenser 14 is installed on the ground avoiding the upper part of the underground pit 17. Further, the upper portions of the first and second underground pits 17a and 17b are lids 19a and 19b that can be opened and closed to facilitate maintenance and inspection of the devices arranged therein.
Is covered with. These lids 19a and 19b have their upper surfaces flush with the ground, and have the upper portion of the automobile 1
6 is formed so that it can be stopped for gas filling.
In addition, on the upper side of the barrier 18, the openings 18a for allowing the air in the first and second underground pits 17a and 17b to flow and for passing various pipes and wirings are formed.

An external gas supply source is connected to the pressure adjusting tank 11 through the gas meter 20 from the underground piping midway, and is further connected to the suction port of the compressor 12 from the pressure adjusting tank 11. The discharge port of the compressor 12 is connected to a pressure accumulator 13 that stores each high-pressure gas through three pipes from a priority panel 21 including a valve that controls to supply high-pressure gas having different pressures. . The pressure accumulator 13 is connected to the dispenser 14 by piping so that different pressures can be supplied. The dispenser 14 is a device that connects a connection port of a gas supply pipe 22 provided on a side surface of the dispenser 14 to a vehicle tank of an automobile 16 and fills the high pressure gas while measuring it.

The above-mentioned first and second underground pits 17a and 1
Temperature sensors 23a and 23b for detecting the internal temperature and gas sensors 24a and 24b for detecting the internal gas concentration are arranged on the upper side of 7b. Also, the first and second underground pits 17a and 1
A pipe having intake ports 25a and 25b for exhausting the gas inside is provided in 7b, and the pipe is connected to the intake port of a blower 26 arranged on the ground, and its discharge port is at the upper part. It is connected to an open pipe. Furthermore, the first and second underground pits 17a and 17b
Inside, there are provided sprinkling ports 27a and 27b for sprinkling water to cool the inside when abnormal heat is generated, etc., respectively, and are connected to sprinkling portions having unillustrated sprinkling pump equipment.

The control device 15 is a device which is arranged in the office room of the building 28 or the like and wholly controls the equipment of each part. For example, the operation of the compressor 12 and the blower 26,
While controlling the priority panel 21 and the pressure accumulator 13, recording the measured value of the dispenser 14, etc., the temperature sensors 23a and 23b and the gas sensors 24a and 24b arranged in the first and second underground pits 17a and 17b. By, the internal temperature and gas concentration are always detected, and when there is an abnormality, the compressor 12 is stopped,
The unnecessary power supply is cut off, the sprinkler is driven, and at the same time, the alarm 29 for notifying that there is an abnormality is driven.

FIG. 2 is a block diagram showing the operation of the control device when an abnormality occurs in the embodiment of the present invention. The temperature sensor 23 (a,
b) detects an abnormal temperature, drives the alarm 29,
The unnecessary power supply unit 30 is cut off, and the water sprinkling unit 31 is further driven. Further, the gas sensor 24 (a, b) detects whether the gas concentration is equal to or higher than a certain value, drives the alarm 29, and disconnects the unnecessary power supply unit 30.

According to the gas filling facility having the above structure, the pressure regulating tank 11, the compressor 12 and the pressure accumulator 13 are housed in the underground pit 17 on the premises, and the pressure regulating tank 11, the compressor 12 and the pressure accumulator 13 are connected. Since a reinforced concrete having a thickness of 12 cm or more or a barrier 18 having the same strength as that is arranged between them, safety can be ensured even if the distance restriction of legal regulations is significantly shortened or eliminated, and the barrier is installed on the ground. The site can be used more effectively than in the case. In addition, the first and second underground pits 17a
The gas sensor 24 is provided on the upper side in each of 17 and 17b.
Since a and 24b are provided, leakage of natural gas, which is lighter than air, can be made more reliably than when detected externally,
By controlling the alarm 29 and the power supply unit 30, it is possible to immediately cope with the danger prevention. Furthermore, the first and second underground pits 1
Since the temperature sensors 23a and 23b are provided in 7a and 17b, respectively, by detecting an abnormal temperature inside, the alarm 29, the power supply unit 30, and the sprinkler unit 31 are controlled to ensure safety. , It is possible to protect the internal equipment from abnormal overheating.

In the above embodiment, natural gas is supplied to the automobile 1.
Although the gas filling equipment for filling 6 has been described as an example, the present invention is not limited to natural gas, and can be applied to a device for filling any compressed gas.

[0018]

As described above, in the present invention, the compressor and the accumulator are arranged in the underground pit, so that the safety can be secured and the site can be effectively used as compared with the case where it is installed on the ground. effective.

[Brief description of drawings]

FIG. 1 is an overall view illustrating a configuration of a gas filling stand including a gas filling facility according to an embodiment of the present invention.

FIG. 2 is an operation block diagram of the control device when an abnormality occurs in the embodiment of the present invention.

[Explanation of symbols]

 11 Pressure Control Tank 12 Compressor 13 Accumulator 14 Dispenser 15 Control Device 16 Vehicle 17 Underground Pit 18 Barrier 19a, 19b Lid 20 Gas Meter 21 Priority Panel 22 Gas Supply Pipe 23a, 23b Temperature Sensor 24a, 24b Gas Sensor 26 Blower 27a, 27b Dispersion Water outlet 28 Building 29 Alarm device 30 Power supply section 31 Sprinkling section

Claims (1)

[Claims] 1. A gas filling facility installed in a gas filling stand for storing high-pressure gas compressed by a compressor in a pressure accumulator, supplying the pressure accumulator to a dispenser, and measuring and supplying with the dispenser. Gas filling facility characterized by arranging a pressure accumulator in the underground pit.