JP3387070B2 - Gas filling equipment - Google Patents

Description

Description: 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, particularly high-pressure natural gas. In recent years, due to environmental energy problems and demands for diversification of energy, the use of electricity, methanol, natural gas and the like as alternative energy for automobile fuel such as gasoline and light oil has been studied. Of these, natural gas is mainly composed of methane gas, and has abundant reserves.
It is distributed all over the world and is attracting attention as an energy that can be supplied stably for a long time, and is used as a main raw material for city gas. Automobiles that use this natural gas as fuel run on compressed natural gas (CNG) filled in a high-pressure tank installed in the vehicle, and are expected to greatly help reduce air pollution and reduce global warming. I have. Conventionally, in a gas filling stand for filling a vehicle with natural gas, a natural gas compressed by a compressor is supplied from an accumulator to a dispenser, and the dispenser fills a high-pressure tank mounted on the vehicle. [0004] By the way, when such a filling facility in a gas filling stand for CNG or the like is installed on the ground, there is a demand for ensuring safety and the like, and the high-pressure gas control law and building codes are required. Under the regulations of the law, various distance restrictions are set. For example, gas filling equipment must be separated from oil storage facilities by 20 m or more, and a reinforced concrete of 12 cm or more in thickness or a barrier of equal strength or more is required between the compressor and the accumulator. [0005] That is, in the conventional gas filling equipment, there is a possibility that the installation at a required place becomes difficult due to the above-mentioned distance limitation or the like, and that there is a problem in effective use of the site. [0006] Therefore, an object of the present invention is to provide a gas filling apparatus capable of ensuring safety and effectively using a site. [0007] In order to achieve the above object, the gas filling equipment of the present invention is provided from an external gas supply source.
The gas supplied through the pipe is stored in the pressure regulating tank,
The compressor driven by the power supplied from the power supply
Compressed by a compressor and a different pressure level from the compressor.
Stored in a pressure accumulator as a high-pressure gas having
Supplied to the dispenser from the pressure accumulator, the dispenser
Gas filling stand to measure and supply with a flow meter
Gas filling equipment installed in the
Dug into the ground of the site and formed the surrounding area with concrete walls
The underground pit is divided into two by a barrier at the center,
To form the first and second underground pit, first and
Make the tops of the second underground pits flush with the ground
Cover with a lid that can be opened and closed
The lesser is located in the first underground pit, and
The spencer is located in the second underground pit,
The dispenser is on the ground, avoiding the top of the underground pit.
In the first and second underground pits,
Arrange the temperature sensor and gas sensor respectively, and
Pipe with an air intake connected to a blower that exhausts
Installed and connected to a sprinkler to cool the interior
Water outlet, and the temperature sensor and the gas sensor
The compressor power supply, water sprinkler and
A control device to control the operation of the detector that notifies
It is a digit . In the gas filling apparatus according to the present invention, the compressor and the pressure accumulator are arranged in an underground pit having a partition wall between them, so that safety can be ensured and the compressor and the pressure accumulator can be installed on the ground. Can also make effective use of the site. An embodiment of the present invention will be described below in detail with reference to an embodiment shown in the drawings. FIG. 1 is an overall view for explaining the configuration of a gas filling stand provided with the gas filling equipment according to the embodiment of the present invention. Referring to FIG. 1, a gas filling stand according to the present embodiment includes a pressure regulating tank 11, a compressor 12, and a pressure accumulator 1.
3, a dispenser 14, a control device 15, and the like. Natural gas supplied from an external gas supply source via an underground pipe or the like is supplied to a pressure regulating tank 11 for preventing pulsation of gas pressure.
And then compressed by compressor 12 and stored in accumulator 13 as high pressure natural gas having different pressure levels, for example, 150, 200, 250 atmospheres,
Further, it is supplied from the pressure accumulator 13 to the dispenser 14,
The fuel is metered by a flow meter provided in the dispenser 14 and filled into a vehicle tank (not shown) of an automobile 16 using natural gas as fuel. The pressure regulating tank 11 and the compressor 12
The pressure accumulator 13 is housed in an underground pit 17 formed by digging down a predetermined ground in the site and surrounding the area with a concrete wall. The underground pit 17 is divided into two at approximately the center by a reinforced concrete having a thickness of 12 cm or more or a barrier 18 having a strength equivalent thereto, and first and second underground pits 17a and 17b are formed respectively. . And the pressure regulating tank 11 and the compressor 12
Located in the first underground pit 17a, the accumulator 13
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. In addition, upper portions of the first and second underground pits 17a and 17b have lids 19a and 19b that can be opened and closed so that maintenance and inspection of the equipment disposed therein can be easily performed.
Covered with. These lids 19a and 19b have their upper surfaces flush with the ground and the upper part of the automobile 1
6 is formed so that it can be stopped for gas filling.
An opening 18a is formed on the upper side of the barrier 18 to allow the air in the first and second underground pits 17a and 17b to flow, and to allow various pipes and wires to pass therethrough. An external gas supply source is connected to the pressure regulating tank 11 through the gas meter 20 on the way from the underground pipe, and is further connected to the suction port of the compressor 12 from the pressure regulating 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 having valves that control the supply of high-pressure gas having different pressures. . The accumulator 13 is connected to a dispenser 14 by a pipe 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 thereof to a vehicle-mounted tank of the automobile 16 and fills the high-pressure gas while measuring it. The first and second underground pits 17a and 17a
Temperature sensors 23a and 23b for detecting the internal temperature, and gas sensors 24a and 24b for detecting the internal gas concentration, respectively, are arranged on the upper side in 7b. Also, the first and second underground pits 17a and 1
In 7b, there are provided pipes each having an inlet 25a and 25b for exhausting gas therein, and the pipe is connected to an inlet of a blower 26 arranged on the ground, and further, its outlet is provided at an upper part. It is connected to open piping. Further, the first and second underground pits 17a and 17b
The inside is provided with sprinkling ports 27a and 27b for sprinkling water to cool the inside at the time of abnormal heat generation and the like, respectively. The control device 15 is a device which is disposed in an office or the like of a building 28 and controls the overall operation of each component. For example, the control device 15 controls the operation of the compressor 12 and the blower 26.
It controls the priority panel 21 and the pressure accumulator 13, records the measured value of the dispenser 14, etc., and also has temperature sensors 23a and 23b and gas sensors 24a and 24b arranged in the first and second underground pits 17a and 17b. With this, the internal temperature and gas concentration are always detected, and when there is an abnormality, the compressor 12 is stopped,
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 an operation block diagram of the control device when an abnormality occurs in the embodiment of the present invention.
b) detects an abnormal temperature and 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 predetermined value, drives the alarm 29, and cuts off the unnecessary power supply unit 30. According to the gas filling equipment having the above structure, the pressure regulating tank 11, the compressor 12 and the pressure accumulator 13 are accommodated in the underground pit 17 on the site, and the pressure regulating tank 11, the compressor 12 and the pressure accumulator 13 are connected to each other. Between them, the reinforced concrete with a thickness of 12 cm or more or the barrier 18 having the same strength as that is arranged, so that safety can be ensured even if the distance limit of the legal regulation is significantly shortened or eliminated, and the ground is installed on the ground. The site can be used more effectively than in the case. Also, the first and second underground pits 17a
And 17b have gas sensors 24
a and 24b are provided, so that leakage of natural gas or the like, which is lighter than air, can be more reliably performed than when externally detected,
By controlling the annunciator 29 and the power supply unit 30, immediate action can be taken to prevent danger. In addition, the first and second underground pits 1
7a and 17b are provided with temperature sensors 23a and 23b, respectively, so that by detecting an abnormal internal temperature, the alarm 29, the power supply unit 30 and the water sprinkling unit 31 are controlled, and safety is ensured. , Can protect internal equipment from abnormal overheating. In the above embodiment, natural gas is supplied to the automobile 1
Although the gas filling equipment for filling in 6 has been described as an example, the present invention is not limited to natural gas and can be applied to an apparatus for filling any compressed gas. As described above, according to the present invention, by arranging the compressor and the accumulator in the underground pit, safety can be ensured, and more effective use of the site than in the case where the compressor is installed on the ground. There is an effect that can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall view for explaining a configuration of a gas filling stand provided with gas filling equipment 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. [Description of Signs] 11 Pressure regulating tank 12 Compressor 13 Accumulator 14 Dispenser 15 Control device 16 Automobile 17 Underground pit 18 Barriers 19a, 19b Cover 20 Gas meter 21 Priority panel 22 Gas supply pipes 23a, 23b Temperature sensors 24a, 24b Gas sensors 26 Blowers 27a, 27b Water spout 28 Building 29 Alarm 30 Power supply 31 Water sprinkler

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B17C 5/00-5/06 B17C 13/00-13/12

Claims (1)

(57) [Claims] [Claim 1] Supply from an external gas supply source via a pipe
Gas is stored in the pressure regulating tank and then from the power supply
Compressed by a compressor driven by supplied power
High pressure with different pressure levels from the compressor
Is stored in the accumulator as a pressurized gas, and
Flow supplied to the dispenser and provided to the dispenser.
Installed on a gas filling stand that weighs and supplies with a meter
In the gas filling equipment, dig into the ground at the site of the filling stand and
The underground pit formed by the reed wall is
To divide into two to form the first and second underground pits
First, the upper parts of the first and second underground pits are respectively grounded.
Cover with a lid that can be opened and closed so that it is flush with the surface
The tank and compressor are located in the first underground pit.
And the dispenser is located in the second underground pit
And the dispenser is above the underground pit
Place on the ground avoiding the ground, and use the first and second underground
Each unit has a temperature sensor and a gas sensor.
Inlet air placed and connected to a blower that exhausts gas inside
To provide piping with ports and to cool the inside
Providing a water spout connected to the water sprinkling section, and the temperature sensor
And the gas sensor detect the compressor.
Controls the drive of the power supply unit, water sprinkling unit, and detectors that report abnormalities
A gas filling facility provided with a control device that performs the control.