Liquefied gas bottle group gas supply equipment

Abstract

The utility model relates to liquefied gas bottle group gas supply equipment which comprises a used gas bottle group, a standby gas bottle group, a fuel gas pressure adjusting assembly and a gas using end, the gas inlet end of the fuel gas pressure adjusting assembly is communicated with the used gas bottle group and the standby gas bottle group respectively, and the output end of the fuel gas pressure adjusting assembly is communicated with the gas using end. The gas pressure adjusting assembly comprises a first buffer pipe, a third buffer pipe, an automatic reversing valve and a pressure reducing terminal, the gas inlet end of the automatic reversing valve communicates with the first buffer pipe and the third buffer pipe, and the output end of the automatic reversing valve communicates with the pressure reducing terminal. By using the liquefied gas supply equipment, the stability of the gas supply pressure can be continuously maintained, meanwhile, when the liquefied gas leaks, the pressure reduction terminal automatically cuts off the pipeline, and when the overpressure phenomenon occurs, the liquefied gas can be diffused, and the liquefied gas equipment at the gas using end is prevented from being damaged.

Description

Technical Field

[0001] The utility model belongs to the field of liquefied gas supply, and in particular relates to a liquefied gas cylinder group gas supply device. Background Art

[0002] As a clean, efficient and convenient energy source, liquefied gas has a very broad application prospect in the current situation of world energy shortage and increasingly prominent environmental pollution problems. Liquefied gas burns more fully, reduces the emission of smoke and harmful gases, and is conducive to improving air quality. This characteristic has made liquefied gas widely concerned and applied in household, industrial and commercial fields.

[0003] When a single gas cylinder supplies gas to gas catering users or multiple residential users, the natural gasification rate of liquefied gas is limited and cannot meet the gas demand. Most of the equipment on the market currently uses a vaporizer heating method to force the liquefied gas to gasify and improve the continuous gas supply capacity. When using liquid-phase gas supply with a vaporizer, non-standard pipelines and pipe fittings will cause liquid liquefied gas to leak, and a small amount of liquid liquefied gas leakage will cause a large amount of gaseous gas leakage; at the same time, multiple gas-phase and liquid-phase gas supply methods also increase the difficulty of designing and selecting pipelines and pipe fittings. In summary, the use of liquid-phase gas supply solutions has caused frequent safety accidents involving liquefied gas.

[0004] Therefore, it is necessary to provide a gas-phase large-flow gas supply device for a liquefied gas cylinder group to solve the problems raised in the above-mentioned background technology. Utility Model Content

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquefied gas cylinder group gas supply equipment, comprising: a working gas cylinder group, a spare gas cylinder group, a gas pressure regulating component, and a gas using end;

[0006] The gas inlet end of the gas pressure regulating assembly is connected to the gas cylinder group and the spare gas cylinder group respectively; the output end of the gas pressure regulating assembly is connected to the gas end;

[0007] The gas pressure regulating assembly comprises: a buffer tube 1, a buffer tube 3, an automatic reversing valve, and a pressure reducing terminal;

[0008] The air inlet end of the automatic reversing valve is respectively connected to the output end of the buffer tube 1 and the output end of the buffer tube 3; the air inlet end of the buffer tube 1 is connected to the use gas cylinder group; the air inlet end of the buffer tube 3 is connected to the spare gas cylinder group;

[0009] The buffer tube 1 and the buffer tube 3 buffer the liquefied gas from the working gas cylinder group and the spare gas cylinder group entering the pressure reducing terminal;

[0010] The output end of the automatic reversing valve is connected to the pressure reducing terminal; when the used gas cylinder group is under-pressure, the automatic reversing valve switches the gas supply from the used gas cylinder group to the backup gas cylinder group, and then when the backup gas cylinder group is under-pressure, the automatic reversing valve switches the gas supply from the backup gas cylinder group to the used gas cylinder group, and the switching is continued automatically;

[0011] The pressure reducing terminal releases the liquefied gas in the pipeline when the pipeline is over-pressured.

[0012] As a further improvement of the utility model, the decompression terminal comprises: a primary decompression module and a secondary decompression module;

[0013] The first-stage pressure reducing module comprises: a cut-off valve and a pipeline branch 1; the air inlet end of the cut-off valve is connected to the output end of the automatic reversing valve through a pipeline, and the output end of the cut-off valve is connected to the pipeline branch 1;

[0014] The two-stage pressure reducing module comprises: a pressure reducing valve 1 and a pipeline branch 2; the air inlet end of the pressure reducing valve 1 is connected to the output end of the cut-off valve through a pipeline, and the output end of the pressure reducing valve 1 is connected to the pipeline branch 2.

[0015] As a further improvement of the utility model, the pipeline branch 1 includes: a ball valve 1, a spring safety valve;

[0016] The air inlet end of the ball valve 1 is connected to the output end of the cut-off valve through a pipeline, and the output end of the ball valve 1 is connected to the spring safety valve;

[0017] The spring safety valve releases the liquefied gas in the pipeline when the pipeline is over-pressured.

[0018] As a further improvement of the present invention, the structure of the second pipeline branch is the same as that of the first pipeline branch.

[0019] As a further improvement of the utility model, the output end of the pressure reducing valve 1 is connected to the air inlet end of the buffer tube 2 through a pipeline, the output end of the buffer tube 2 is connected to the air inlet end of the ball valve 2, and the output end of the ball valve 2 is connected to the air using end.

[0020] As a further improvement of the utility model, the buffer tube 1, the buffer tube 2 and the buffer tube 3 are all connected to a pressure transmitter and a mechanical pressure gauge.

[0021] As a further improvement of the utility model, the shut-off valve is an electric ball valve or an electromagnetic shut-off valve.

[0022] As a further improvement of the present invention, a detector is installed on the cut-off valve, and the detector controls the cut-off valve to cut off the pipeline when the pipeline leaks.

[0023] As a further improvement of the utility model, the automatic reversing valve is built with a second pressure reducing valve.

[0024] As a further improvement of the present invention, at least two groups of the working gas cylinder group and the spare gas cylinder group are provided.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] 1. The use of gas cylinder groups and spare gas cylinder groups is scalable. The number of gas cylinder groups can be increased or decreased according to the needs of different users to improve the continuous gas supply capacity;

[0027] 2. Under the gas pressure regulating assembly, the shut-off valve will automatically cut off when liquefied gas leaks to avoid continuous leakage. When overpressure occurs, the liquefied gas in the pipeline will be released through the spring safety valve to keep the gas-using equipment at the lower end from being damaged.

[0028] 3. When the gas cylinder group is under-pressure, there is no need to electrically heat the gasifier. The automatic reversing valve will switch the gas supply from the gas cylinder group to the standby gas cylinder group, and switch to the gas supply from the gas cylinder group after the pressure of the gas cylinder group is restored, ensuring uninterrupted gas use for users and giving priority to consumption of the gas cylinder group. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a schematic diagram of a gas supply device for a liquefied gas cylinder group.

[0030] Figure numbers: 1. Buffer tube 1; 2. Automatic reversing valve; 3. Shut-off valve; 4. Ball valve 1; 5. Spring safety valve; 6. Pressure reducing valve 1; 7. Buffer tube 2; 9. Pressure transmitter; 10. Ball valve 2; 12. Pipeline branch 1; 13. Pipeline branch 2; 14. Mechanical pressure gauge; 15. Buffer tube 3. DETAILED DESCRIPTION

[0031] See also Figure 1 As shown, a liquefied gas cylinder group gas supply equipment is characterized by comprising: a working gas cylinder group, a spare gas cylinder group, a gas pressure regulating component, and a gas using end;

[0032] The gas inlet end of the gas pressure regulating assembly is connected to the gas cylinder group and the spare gas cylinder group respectively; the output end of the gas pressure regulating assembly is connected to the gas end;

[0033] The gas pressure regulating assembly includes: a buffer tube 1, a buffer tube 3 15, an automatic reversing valve 2, and a pressure reducing terminal;

[0034] The air inlet end of the automatic reversing valve 2 is respectively connected to the output end of the buffer tube 1 and the output end of the buffer tube 3 15; the air inlet end of the buffer tube 1 is connected to the use gas cylinder group; the air inlet end of the buffer tube 3 15 is connected to the spare gas cylinder group;

[0035] The buffer tube 1 and the buffer tube 3 15 buffer the liquefied gas from the working gas cylinder group and the spare gas cylinder group entering the pressure reducing terminal, thereby increasing the gasification volume of the liquefied gas and preventing the liquefied gas from absorbing a large amount of heat during the gasification process, thereby causing the temperature of the working gas cylinder group and the spare gas cylinder group to decrease, resulting in a decrease in the gasification efficiency of the liquefied gas;

[0036] The output end of the automatic reversing valve 2 is connected to the pressure reducing terminal; when the gas cylinder group in use is under-pressure, the automatic reversing valve 2 will switch the gas supply from the gas cylinder group in use to the gas supply from the backup gas cylinder group to ensure uninterrupted gas use by the user. Thereafter, when the backup gas cylinder group is under-pressure, the automatic reversing valve will switch the gas supply from the backup gas cylinder group to the gas supply from the gas cylinder group in use, and the switching will continue automatically.

[0037] When the pipeline is over-pressured, the pressure reducing terminal releases the liquefied gas in the pipeline to protect the gas-using end from damage.

[0038] In this embodiment, preferably, the decompression terminal includes: a primary decompression module and a secondary decompression module;

[0039] The first-stage pressure reducing module comprises: a cut-off valve 3 and a pipeline branch 12; the air inlet end of the cut-off valve 3 is connected to the output end of the automatic reversing valve 2 through a pipeline, and the output end of the cut-off valve 3 is connected to the pipeline branch 12;

[0040] The secondary pressure reducing module comprises: a pressure reducing valve 1 6 and a pipeline branch 2 13 ; the air inlet end of the pressure reducing valve 1 6 is connected to the output end of the shut-off valve 3 through a pipeline, and the output end of the pressure reducing valve 1 6 is connected to the pipeline branch 2 13 .

[0041] In this embodiment, preferably, the pipeline branch 12 includes: a ball valve 4, a spring safety valve 5;

[0042] The air inlet end of the ball valve 1 4 is connected to the output end of the cut-off valve 3 through a pipeline, and the output end of the ball valve 1 4 is connected to the spring safety valve 5;

[0043] When the pipeline is over-pressurized, the spring safety valve 5 releases the liquefied gas in the pipeline to maintain the stability of the liquefied gas pressure in the pipeline, thereby preventing the liquefied gas over-pressure from damaging the gas-using end; the installation position of the spring safety valve 5 will not hurt people and equipment.

[0044] The outlet pressure can be adjusted by adjusting the pressure reducing valve 6 to meet the different liquefied gas pressure requirements of civil and industrial and commercial users.

[0045] In this embodiment, preferably, the structure of the second pipeline branch 13 is the same as that of the first pipeline branch 12.

[0046] In the present embodiment, preferably, the output end of the pressure reducing valve 16 is also connected to the air inlet end of the buffer tube 27 through a pipeline, the output end of the buffer tube 27 is connected to the air inlet end of the ball valve 210, the output end of the ball valve 210 is connected to the gas using end, the ball valve 210 is controlled at the total outlet, and after the liquefied gas passes through the ball valve 210, the pipeline is laid according to the on-site installation position and connected to the user's gas using end.

[0047] In this embodiment, preferably, the buffer tube 1, buffer tube 2 7, and buffer tube 3 15 are all connected to a pressure transmitter 9 and a mechanical pressure gauge 14. The mechanical pressure gauge 14 effectively avoids the phenomenon that the liquefied gas pressure cannot be observed due to power outages or failures, thereby improving gas safety.

[0048] In this embodiment, preferably, the shut-off valve 3 is an electric ball valve or an electromagnetic shut-off valve.

[0049] In this embodiment, preferably, a detector is installed on the shut-off valve 3, and the detector controls the shut-off valve 3 to shut off the pipeline when the pipeline leaks. This position can ensure that the pipeline is shut off at the position closest to the gas source (the best position considering the comprehensive economic cost).

[0050] In this embodiment, preferably, the automatic reversing valve 2 is internally provided with a second pressure reducing valve, and the second pressure reducing valve automatically reduces the high-pressure gas flow to a medium-pressure gas flow.

[0051] In this embodiment, preferably, at least two groups of the working gas cylinder group and the spare gas cylinder group are provided.

[0052] During normal use, the gas cylinder group is connected to the buffer tube 1 through a pipeline. When the liquefied gas pressure in the gas cylinder group is reduced and cannot meet the gas demand of the user, the automatic reversing valve 2 switches to connect to the buffer tube 3 15 and cuts off the connection with the buffer tube 1, that is, the spare gas cylinder group is used to supply gas to the gas-using end; when the liquefied gas pressure in the gas cylinder group rises, the automatic reversing valve 2 is reconnected to the buffer tube 1 and cuts off the connection with the buffer tube 3 15, that is, the gas cylinder group is used to continue to supply gas to the gas-using end, ensuring the user's uninterrupted gas use and maintaining the stability of the liquefied gas supply pressure. At the same time, the gas cylinder group is used for gas supply first. When the gas cylinder is consumed and there is residual liquid in the spare gas cylinder group, the user replaces the gas cylinder group during this period.

[0053] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A liquefied gas cylinder group gas supply equipment, characterized in that: include: Use gas cylinder group, spare gas cylinder group, gas pressure regulating assembly, gas using end; The gas inlet end of the gas pressure regulating assembly is respectively connected to the working gas cylinder group and the spare gas cylinder group; The output end of the gas pressure regulating assembly is connected to the gas using end; The gas pressure regulating assembly comprises: a buffer tube 1 (1), a buffer tube 3 (15), an automatic reversing valve (2), and a pressure reducing terminal; The air inlet end of the automatic reversing valve (2) is respectively connected to the output end of the buffer tube one (1) and the output end of the buffer tube three (15); the air inlet end of the buffer tube one (1) is connected to the use gas cylinder group; the air inlet end of the buffer tube three (15) is connected to the spare gas cylinder group; The buffer tube 1 (1) and the buffer tube 3 (15) buffer the liquefied gas from the working gas cylinder group and the spare gas cylinder group entering the pressure reducing terminal; The output end of the automatic reversing valve (2) is in communication with the pressure reducing terminal; when the used gas cylinder group is under-pressure, the automatic reversing valve (2) switches the gas supply from the used gas cylinder group to the gas supply from the standby gas cylinder group; The pressure reducing terminal releases the liquefied gas in the pipeline when the pipeline is over-pressured.

2. A liquefied gas cylinder group gas supply equipment according to claim 1, characterized in that: The decompression terminal comprises: a primary decompression module and a secondary decompression module; The first-stage pressure reducing module comprises: a shutoff valve (3) and a pipeline branch one (12); the air inlet end of the shutoff valve (3) is connected to the output end of the automatic reversing valve (2) through a pipeline, and the output end of the shutoff valve (3) is connected to the pipeline branch one (12); The two-stage pressure reducing module comprises: a pressure reducing valve 1 (6) and a pipeline branch 2 (13); the air inlet end of the pressure reducing valve 1 (6) is connected to the output end of the cut-off valve (3) through a pipeline, and the output end of the pressure reducing valve 1 (6) is connected to the pipeline branch 2 (13).

3. A liquefied gas cylinder group gas supply equipment according to claim 2, characterized in that: The pipeline branch one (12) comprises: a ball valve one (4), a spring safety valve (5); The air inlet end of the ball valve 1 (4) is connected to the output end of the cut-off valve (3) through a pipeline, and the output end of the ball valve 1 (4) is connected to the spring safety valve (5); The spring safety valve (5) releases the liquefied gas in the pipeline when the pipeline is over-pressured.

4. A liquefied gas cylinder group gas supply equipment according to claim 3, characterized in that: The structure of the pipeline branch 2 (13) is the same as that of the pipeline branch 1 (12).

5. A liquefied gas cylinder group gas supply equipment according to claim 2, characterized in that: The output end of the pressure reducing valve 1 (6) is also connected to the air inlet end of the buffer tube 2 (7) through a pipeline, and the output end of the buffer tube 2 (7) is connected to the air inlet end of the ball valve 2 (10), and the output end of the ball valve 2 (10) is connected to the air using end.

6. A liquefied gas cylinder group gas supply equipment according to claim 4, characterized in that: The buffer tube 1 (1), buffer tube 2 (7) and buffer tube 3 (15) are all connected to a pressure transmitter (9) and a mechanical pressure gauge (14).

7. A liquefied gas cylinder group gas supply equipment according to claim 2, characterized in that: The cut-off valve (3) is an electric ball valve or an electromagnetic cut-off valve.

8. A liquefied gas cylinder group gas supply equipment according to claim 7, characterized in that: The cut-off valve (3) is provided with a detector, and when the pipeline leaks, the detector controls the cut-off valve (3) to cut off the pipeline.

9. The liquefied gas cylinder group gas supply equipment according to claim 1, characterized in that: The automatic reversing valve (2) is provided with a second pressure reducing valve built therein.

10. The liquefied gas cylinder group gas supply equipment according to claim 1, characterized in that: At least two groups of the working gas cylinder group and the spare gas cylinder group are provided.

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