CN215764630U - Automatic pressurization filling control device for low-temperature liquid storage tank - Google Patents
Automatic pressurization filling control device for low-temperature liquid storage tank Download PDFInfo
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- CN215764630U CN215764630U CN202122363748.6U CN202122363748U CN215764630U CN 215764630 U CN215764630 U CN 215764630U CN 202122363748 U CN202122363748 U CN 202122363748U CN 215764630 U CN215764630 U CN 215764630U
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Abstract
The utility model discloses an automatic pressurization and filling control device for a low-temperature liquid storage tank, which comprises a low-temperature storage tank, a pressurization pipeline and a filling pipeline, wherein the low-temperature storage tank is provided with a pressure inlet and a pressure outlet; a storage tank is arranged in the low-temperature storage tank, low-temperature liquid is stored in the storage tank, and the low-temperature storage tank is provided with an air inlet and a liquid outlet; the pressurization pipeline comprises a high-pressure air source, a pressurization pipeline and a pressurization gas cut-off valve, wherein the air inlet end of the pressurization pipeline is communicated with the high-pressure air source, the air outlet end of the pressurization pipeline is connected with the air inlet, the pressurization gas cut-off valve is arranged on the pressurization pipeline, and the filling pipeline comprises a filling pipeline and a filling valve; in the process of filling low-temperature liquid into a tank car by a low-temperature storage tank, a pump is replaced by gas pressurization, so that a cold pump link is avoided, the filling preparation time is greatly shortened, the liquid loss in the cold pump process is reduced, meanwhile, an automatic filling valve is additionally arranged, the control can be performed by a PLC (programmable logic controller), the field unmanned operation is realized, and the labor efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of filling of low-temperature liquid tank cars, in particular to an automatic pressurizing and filling control device for a low-temperature liquid storage tank.
Background
Liquid oxygen, liquid nitrogen, liquid argon and other low-temperature liquids produced by the air separation device are stored in a low-temperature liquid storage tank in a daily mode, and the storage tank is divided into a normal-pressure storage tank and a pressure storage tank. The liquid in the storage tank is sold outside the vehicle through the filling tank. The low-temperature liquid in the storage tank is pressurized to 0.6MPa by a low-temperature pump and then is conveyed to the tank truck. The low-temperature liquid pump needs to be fully cooled before being started, otherwise cavitation can be generated, the cooling time is usually 10-15 minutes, in order to accelerate the cooling process, a blow-off valve needs to be opened in the cooling process to discharge the low-temperature liquid to judge whether the cooling pump is full, a large amount of liquid can be wasted in the cooling process, and meanwhile, the low-temperature liquid discharge has the safety risk of frostbite.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an automatic pressurization and filling control device for a low-temperature liquid storage tank aiming at the defects in the prior art.
The technical scheme for solving the problems comprises the following steps: an automatic pressurization and filling control device of a low-temperature liquid storage tank comprises a low-temperature storage tank, a pressurization pipeline and a filling pipeline;
a storage tank is arranged in the low-temperature storage tank, low-temperature liquid is stored in the storage tank, and the low-temperature storage tank is provided with an air inlet and a liquid outlet;
the pressurizing pipeline comprises a high-pressure air source, a pressurizing pipeline and a pressurizing air cut-off valve, the air inlet end of the pressurizing pipeline is communicated with the high-pressure air source, the air outlet end of the pressurizing pipeline is connected with the air inlet, the pressurizing air cut-off valve is arranged on the pressurizing pipeline,
the filling line comprises a filling duct and a filling valve.
Furthermore, a pressurization air regulating valve and a pressurization air pressure detection transmitter are also arranged on the pressurization pipeline.
Furthermore, the device also comprises a PLC controller, and the booster air shutoff valve, the booster air regulating valve and the booster air pressure detection transmitter are connected with the PLC controller.
Further, the filling valve comprises a manual filling valve and an automatic filling valve.
Further, the automatic filling valve is connected with a PLC controller.
Furthermore, the high-pressure gas source and the low-temperature liquid in the storage tank are the same medium components.
The utility model has the following beneficial effects:
the utility model provides an automatic pressurization filling control device of a low-temperature liquid storage tank, which is characterized in that in the process of filling low-temperature liquid into a tank car by a low-temperature storage tank, a pump is replaced by gas pressurization, so that the cold pump link is avoided, the filling preparation time is greatly shortened, the liquid loss in the cold pump process is reduced, meanwhile, an automatic filling valve is additionally arranged, the control can be performed through a PLC (programmable logic controller), the field unmanned operation is realized, and the labor efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an electrical control diagram of the present invention;
in the figure: 1-a low-temperature storage tank, 2-a PLC, 3-a storage tank, 4-a high-pressure air source, 5-a pressurization pipeline, 6-a pressurization air cut-off valve, 7-a pressurization air regulating valve, 8-a pressurization air pressure detection transmitter, 9-a filling pipeline, 10-a manual filling valve and 11-an automatic filling valve.
Detailed Description
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1 and 2, an automatic pressurization and filling control device for a cryogenic liquid storage tank comprises a cryogenic storage tank, a PLC controller, a pressurization pipeline and a filling pipeline;
a storage tank is arranged in the low-temperature storage tank, and low-temperature liquid, such as liquid oxygen, liquid nitrogen and liquid argon, is stored in the storage tank; the top of the low-temperature storage tank is provided with an air inlet, and the bottom of the low-temperature storage tank is provided with a liquid outlet;
the pressurization pipeline comprises a high-pressure gas source, a pressurization pipeline, a pressurization gas cut-off valve, a pressurization gas regulating valve and a pressurization gas pressure detection transmitter, wherein the gas inlet end of the pressurization pipeline is communicated with the high-pressure gas source, the gas outlet end of the pressurization pipeline is connected with the gas inlet, the pressurization gas cut-off valve, the pressurization gas regulating valve and the pressurization gas pressure detection transmitter are sequentially arranged on the pressurization pipeline, the pressurization gas pressure detection transmitter is used for detecting the gas pressure in the pressurization pipeline, the pressurization gas cut-off valve, the pressurization gas regulating valve and the pressurization gas pressure detection transmitter are connected with a PLC (programmable logic controller), the high-pressure gas source and low-temperature liquid in the storage tank are the same medium component, and when liquid oxygen is stored in the storage tank, the high-pressure gas source is oxygen; when liquid nitrogen is filled in the storage tank, the high-pressure gas source is nitrogen; when liquid argon is in the storage tank, the high-pressure gas source is argon.
The pressurization gas shutoff valve is opened, the PLC controls the pressurization gas regulating valve according to the pressurization gas pressure detection transmitter, the pressure in the pressurization pipeline is kept to be not lower than 0.8MPa, the gas in the pressurization pipeline is ensured to have driving force, the high-pressure gas source is introduced into the storage tank after the pressure is controlled by the pressurization gas regulating valve, the pressure in the storage tank is increased, and the low-temperature liquid in the storage tank is discharged from the filling pipeline.
The filling pipeline comprises a filling pipeline, a manual filling valve and an automatic filling valve, one end of the filling pipeline is connected with the liquid outlet, the other end of the filling pipeline is connected with the filling port of the tank car, the manual filling valve and the automatic filling valve are sequentially arranged on the filling pipeline, and the automatic inflation valve is connected with the PLC.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (6)
1. The utility model provides an automatic pressure boost of cryogenic liquids storage tank fills dress controlling means which characterized in that: comprises a low-temperature storage tank, a pressurization pipeline and a filling pipeline;
a storage tank is arranged in the low-temperature storage tank, low-temperature liquid is stored in the storage tank, and the low-temperature storage tank is provided with an air inlet and a liquid outlet;
the pressurization pipeline comprises a high-pressure air source, a pressurization pipeline and a pressurization gas cut-off valve, wherein the air inlet end of the pressurization pipeline is communicated with the high-pressure air source, the air outlet end of the pressurization pipeline is connected with the air inlet, and the pressurization gas cut-off valve is arranged on the pressurization pipeline;
the filling line comprises a filling duct and a filling valve.
2. An automatic pressurization charging control device for a cryogenic liquid storage tank according to claim 1, wherein: and a pressurization air regulating valve and a pressurization air pressure detection transmitter are also arranged on the pressurization pipeline.
3. An automatic boost charge control apparatus for a cryogenic liquid storage tank according to claim 2, wherein: the device also comprises a PLC controller, wherein the booster gas cutting-off valve, the booster gas regulating valve and the booster gas pressure detection transmitter are connected with the PLC controller.
4. An automatic pressure-increasing and filling control device for a cryogenic liquid storage tank according to any one of claims 1 to 3, wherein: the filling valves include manual filling valves and automatic filling valves.
5. An automatic boost charge control apparatus for a cryogenic liquid storage tank according to claim 4, wherein: and the automatic filling valve is connected with a PLC (programmable logic controller).
6. An automatic pressurization charging control device for a cryogenic liquid storage tank according to claim 1, wherein: the high-pressure gas source and the low-temperature liquid in the storage tank are the same medium component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122363748.6U CN215764630U (en) | 2021-09-28 | 2021-09-28 | Automatic pressurization filling control device for low-temperature liquid storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122363748.6U CN215764630U (en) | 2021-09-28 | 2021-09-28 | Automatic pressurization filling control device for low-temperature liquid storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215764630U true CN215764630U (en) | 2022-02-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122363748.6U Active CN215764630U (en) | 2021-09-28 | 2021-09-28 | Automatic pressurization filling control device for low-temperature liquid storage tank |
Country Status (1)
| Country | Link |
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| CN (1) | CN215764630U (en) |
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2021
- 2021-09-28 CN CN202122363748.6U patent/CN215764630U/en active Active
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