CN216383586U

CN216383586U - Gas filling system

Info

Publication number: CN216383586U
Application number: CN202123095504.0U
Authority: CN
Inventors: 邓明超; 江冲
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-04-26
Anticipated expiration: 2031-12-10

Abstract

The utility model relates to a gas filling system, which comprises a low-temperature liquid storage tank, an expansion tank, a buffer tank and a plurality of high-pressure gas cylinders which are sequentially connected through pipelines, wherein the expansion tank is used for expanding and gasifying liquefied gas, and a metering device for controlling the liquid outlet flow is connected between the low-temperature liquid storage tank and the expansion tank, and the gas filling system has the beneficial effects that: the high-pressure gas is obtained by the way that the liquid gas is subjected to heat absorption gasification at normal temperature in the expansion tank and the pressure is increased, so that the high-pressure gas can be obtained without power input, the production cost is reduced, the system structure is simplified, the quality of the liquid gas entering the filling system is controlled by the metering device, and the pressure of the gas finally filled into the high-pressure gas cylinder is controlled; meanwhile, no compression equipment is connected, so that the entering of impurities and noise pollution are effectively avoided, the power consumption is reduced, and the purity of the gas is greatly improved.

Description

Gas filling system

Technical Field

The utility model relates to the technical field of gas filling equipment, in particular to a gas filling system.

Background

At present, a large amount of industrial gases such as oxygen, nitrogen, argon and the like are used in industrial production, most of the industrial gases are contained by using a high-pressure gas cylinder, and the current filling mode is as follows: liquid gas-boil-off-compressor compression-charge. This type of filling has some drawbacks: the compressor needs frequent maintenance, impurities can be introduced in the compression process of the compressor, the power consumption is high, the requirement on an installation site is high, and the noise is high.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide a gas filling system to overcome the above-mentioned deficiencies in the prior art.

The technical scheme for solving the technical problems is as follows: the utility model provides a gas filling system, includes cryogenic liquids storage tank, expansion tank, buffer tank and a plurality of high-pressure gas cylinder that connect gradually through the pipeline, the expansion tank is so that liquefied gas inflation gasification, be connected with the metering device of control play liquid flow between cryogenic liquids storage tank and the expansion tank.

The utility model has the beneficial effects that: the high-pressure gas is obtained by the way that the liquid gas is subjected to heat absorption gasification at normal temperature in the expansion tank and the pressure is increased, so that the high-pressure gas can be obtained without power input, the production cost is reduced, the system structure is simplified, the quality of the liquid gas entering the filling system is controlled by the metering device, and the pressure of the gas finally filled into the high-pressure gas cylinder is controlled; meanwhile, no compression equipment is connected, so that the entering of impurities and noise pollution are effectively avoided, the power consumption is reduced, and the purity of the gas is greatly improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the copper sheet of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the device comprises a low-temperature liquid storage tank, 2, an expansion tank, 3, a buffer tank, 4, a high-pressure gas cylinder, 5, a metering device, 51, a mass flow meter, 52, a weighing tank, 53, a liquid inlet valve, 54, a liquid outlet valve, 55, a pressure equalizing valve, 56, a relief valve, 21, a copper sheet, 22, a through hole, 6, a safety valve, 7 and an emptying valve.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

Embodiment 1, as shown in fig. 1 to 2, a gas filling system includes a cryogenic liquid storage tank 1, an expansion tank 2, a buffer tank 3, and a plurality of high pressure gas cylinders 4 connected in sequence by pipes, the expansion tank 2 is used to expand and gasify liquefied gas, a metering device 5 for controlling liquid flow is connected between the cryogenic liquid storage tank 1 and the expansion tank 2, the high pressure gas cylinder 4 is connected to the system, a valve between the high pressure gas cylinder 4 and the system is opened, the liquid gas enters the metering device 5 from the cryogenic liquid storage tank 1, the metering device 5 meters the mass of the liquid gas flowing through, when the liquid gas entering the metering device 5 reaches a preset value, the liquid gas enters the expansion tank 2 to be expanded, pressurized and gasified, the gas after being expanded and pressurized is buffered in the buffer tank 3 to reduce pressure fluctuation during filling, and after one-time filling is completed, the buffer vessel 3 will store a certain amount of gas for the next filling to pre-fill the gas cylinder 4.

Example 2, as shown in fig. 1 to 2, this example is a further improvement on example 1, and specifically includes the following:

the metering device 5 comprises a mass flow meter 51 and a weighing tank 52 which are connected in sequence, the expansion tank 2 is connected below the weighing tank 52 through a pipeline, the mass flow meter 51 is convenient for detecting the mass of the passing liquid gas, and meanwhile, the inflow of the liquid gas is controlled according to a preset flow value.

Example 3, as shown in fig. 1 to 2, this example is a further improvement on example 2, and specifically includes the following:

a liquid inlet valve 53 is arranged between the mass flowmeter 51 and the weighing tank 52; a liquid outlet valve 54 is arranged between the weighing tank 52 and the expansion tank 2, the mass flow meter 51 is electrically connected with the liquid inlet valve 53, when the weight of the liquid gas entering the weighing tank 52 reaches a preset value, a signal for closing the valve is provided for the liquid inlet valve 53, and then the liquid outlet valve 54 is opened, so that the liquid gas enters the expansion tank 2 for expansion and gasification.

Example 4, as shown in fig. 1 to 2, this example is a further improvement on example 3, and specifically includes the following steps:

be equipped with between weighing tank 52 and the expansion tank 2 and go out the equalizer valve 55 that liquid valve 54 parallel set up, equalizer valve 55 is used for the gaseous phase space of intercommunication expansion tank 2 and weighing tank 52, makes the atmospheric pressure between expansion tank 2 and the weighing tank 52 the same, and the liquid gas in the weighing tank 52 of being convenient for can flow into in the expansion tank 2 more fast.

Example 5, as shown in fig. 1 to 2, this example is a further improvement on example 2, and specifically includes the following:

the weighing tank 52 is provided with a blow-off valve 56, and the blow-off valve 56 can reduce the pressure in the weighing tank 52 when the liquid gas enters the weighing tank 52, so that a certain pressure difference is maintained between the low-temperature liquid storage tank 1 and the weighing tank 52, and the liquid gas can conveniently enter the weighing tank 52 under the action of the pressure.

Example 6, as shown in fig. 1 to 2, this example is a further improvement on example 3, and specifically includes the following:

the liquid inlet valve 53 is a pneumatic cut-off valve which can be driven by compressed air or nitrogen and has two states of 'on' and 'off', and the liquid inlet valve 53 can be closed and opened more rapidly and safely.

Example 7, as shown in fig. 1 to 2, this example is a further improvement on example 1, and specifically includes the following:

be equipped with heliciform copper sheet 21 in the expansion tank 2, be equipped with a plurality of through-holes 22 on the copper sheet, heat transfer between the liquid gas in the expansion tank 2 and the environment can effectively be accelerated to heliciform copper sheet 21, and the through-hole 22 on the copper sheet 21 is more convenient for the gas after the gasification to pass through simultaneously.

Example 8, as shown in fig. 1 to 2, this example is a further improvement on example 1, and specifically includes the following:

the end of the gas flow direction of the pipeline is provided with a safety valve 6, and in the working process of the system, if the pressure exceeds the preset safety pressure, the safety valve 6 can automatically jump to release the pressure so as to ensure the safety of the system.

Example 9, as shown in fig. 1 to 2, this example is a further improvement on example 1, and specifically includes the following:

and the tail end of the pipeline in the gas flow direction is provided with a vent valve 7, and the vent valve 7 can be opened for purging replacement when the equipment pipeline system needs purging.

The specific working process of the utility model is as follows:

1. the high pressure gas cylinder 4 is connected to the system and the valve between the high pressure gas cylinder 4 and the system is opened.

2. The liquid outlet valve 54 and the pressure equalizing valve 55 are closed, the bleeding valve 56 is opened, the liquid inlet valve 53 is opened, the liquid gas enters the weighing tank 52 from the low-temperature liquid storage tank 1, the mass of the flowing liquid gas is measured by the mass flowmeter 51, and the liquid inlet valve 53 and the bleeding valve 56 are closed after the liquid gas entering the weighing tank 52 reaches a preset value.

3. And opening the pressure equalizing valve 55 to enable the pressure of the weighing tank 52 to be consistent with that of the expansion tank 2, then opening the liquid outlet valve 54 to enable the liquid gas to flow into the expansion tank 2 from the weighing tank 52 under the action of gravity, and enabling the liquid gas to absorb heat in the expansion tank 2 and vaporize into a gaseous state and then enter the buffer tank 3 and the high-pressure gas bottle 4.

4. After the gasification of all the liquid gas is finished, when the gas pressure in the high-pressure gas cylinder 4 reaches the filling pressure value, a valve between the high-pressure gas cylinder 4 and the system is closed, and the high-pressure gas cylinder 4 is disconnected from the system.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. The gas filling system is characterized by comprising a low-temperature liquid storage tank (1), an expansion tank (2), a buffer tank (3) and a plurality of high-pressure gas cylinders (4) which are sequentially connected through pipelines, wherein the expansion tank (2) is used for expanding and gasifying liquefied gas, and a metering device (5) for controlling liquid outlet flow is connected between the low-temperature liquid storage tank (1) and the expansion tank (2).

2. A gas filling system according to claim 1, wherein the metering device (5) comprises a mass flow meter (51) and a weighing tank (52) connected in series, the expansion tank (2) being connected by a pipe below the weighing tank (52).

3. A gas filling system according to claim 2, wherein a liquid inlet valve (53) is provided between the mass flow meter (51) and the weighing tank (52); a liquid outlet valve (54) is arranged between the weighing tank (52) and the expansion tank (2), and the mass flow meter (51) is electrically connected with the liquid inlet valve (53).

4. A gas filling system according to claim 3, wherein a pressure equalizing valve (55) is arranged between the weighing tank (52) and the expansion tank (2) in parallel with the tapping valve (54).

5. A gas filling system according to claim 2, wherein a blow-off valve (56) is provided on the weighing tank (52).

6. A gas filling system according to claim 3, wherein the liquid inlet valve (53) is a pneumatic shut-off valve.

7. A gas filling system according to claim 1, wherein the expansion tank (2) is provided with a helical copper sheet (21) provided with a number of through holes (22).

8. A gas filling system according to claim 1, wherein the gas flow direction end of the duct is provided with a safety valve (6).

9. A gas filling system according to claim 1, wherein the duct is provided with a blow-off valve (7) at the end of the gas flow direction.