Liquid oxygen supply station automatic supply system

Abstract

This utility model belongs to the field of pipeline gas supply technology and discloses an automatic gas supply system for a liquid oxygen supply station, including a liquid oxygen storage tank, a vaporizer group, a pressure regulating valve group, and a PLC control system. The vaporizer group includes a main vaporizer and an auxiliary vaporizer. The liquid oxygen storage tank is connected to the main vaporization input pipe of the main vaporizer and the auxiliary vaporization input pipe of the auxiliary vaporizer through a liquid oxygen output pipe. The main vaporization output pipe of the main vaporizer and the auxiliary vaporization output pipe of the auxiliary vaporizer are both connected to the inlet pipe of the pressure regulating valve group. The outlet pipe of the pressure regulating valve group is connected to each gas consumption point through a total output pipe. A first electric valve is installed on the main vaporization input pipe, and a first temperature transmitter is installed on the main vaporization output pipe. A second electric valve is installed on the auxiliary vaporization input pipe, and a second temperature transmitter is installed on the auxiliary vaporization output pipe. This utility model is suitable for long-term uninterrupted and safe gas supply to liquid oxygen supply stations, ensuring continuous and stable gas supply, high safety performance, easy operation, and no need for constant on-site monitoring.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline gas supply technology and relates to an automatic gas supply system for a liquid oxygen supply station. Background Technology

[0002] Liquid oxygen supply stations are the core of oxygen supply for medical institutions and industrial production, mainly responsible for the centralized supply of oxygen and ensuring supply from multiple points. Liquid oxygen supply stations typically use liquid oxygen storage tanks for liquid oxygen transportation. The liquid oxygen is transported through supply pipelines to a vaporizer for vaporization, and then the oxygen is delivered to different equipment using the liquid oxygen.

[0003] In the process of vaporizing liquid oxygen from a liquid oxygen storage tank using a vaporizer, the vaporization process absorbs a large amount of heat, causing ice to easily form on the outside of the vaporizer. This ice layer hinders further heat absorption, limiting the vaporization rate. If the vaporization rate cannot keep up, and excessive gas consumption continues, liquid oxygen will be trapped in the gas in the pipeline after the vaporizer. This causes the pipeline temperature to drop, making it prone to brittleness and rupture, leading to accidents and gas supply interruptions. Therefore, it is essential to design an automatic gas supply system that can ensure a long-term, uninterrupted, and safe supply of liquid oxygen to the gas supply station. Utility Model Content

[0004] The purpose of this invention is to provide an automatic gas supply system for liquid oxygen supply stations, which solves the problem of long-term uninterrupted and safe gas supply for liquid oxygen supply stations. It has high safety performance, is easy to operate, and does not require constant on-site monitoring by personnel.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An automatic gas supply system for a liquid oxygen supply station includes at least two liquid oxygen storage tanks, a vaporizer group, a pressure regulating valve group, and a PLC control system; the vaporizer group includes a main vaporizer and an auxiliary vaporizer.

[0007] The inlet of each liquid oxygen storage tank is connected to the liquid oxygen tanker through a liquid oxygen input pipeline. The outlet of each liquid oxygen storage tank is connected to the main vaporization input pipeline of the main vaporizer and the auxiliary vaporization input pipeline of the auxiliary vaporizer through a liquid oxygen output pipeline. The main vaporization output pipeline of the main vaporizer and the auxiliary vaporization output pipeline of the auxiliary vaporizer are respectively connected to the inlet pipeline of the pressure regulating valve group. The outlet pipeline of the pressure regulating valve group is connected to each gas consumption point through a main output pipeline.

[0008] The main vaporizer is equipped with a first electric valve on its main vaporization input pipe and a first temperature transmitter on its main vaporization output pipe; the auxiliary vaporizer is equipped with a second electric valve on its auxiliary vaporization input pipe and a second temperature transmitter on its auxiliary vaporization output pipe.

[0009] The first electric valve, the first temperature transmitter, the second electric valve, and the second temperature transmitter are respectively connected to the PLC control system.

[0010] As a limitation, the main vaporization input pipe of the main vaporizer is also equipped with a first safety valve, and the main vaporization output pipe is also equipped with a first shut-off valve; the auxiliary vaporizer is also equipped with a second safety valve on the auxiliary vaporization input pipe, and the auxiliary vaporization output pipe is also equipped with a second shut-off valve.

[0011] The first safety valve, the first shut-off valve, the second safety valve, and the second shut-off valve are respectively connected to the PLC control system.

[0012] As a second limitation, each of the liquid oxygen storage tanks is equipped with a third electric valve on its liquid oxygen output pipeline, and each liquid oxygen storage tank is equipped with a level transmitter and a first pressure transmitter, and each liquid oxygen storage tank is equipped with a pressure boosting valve on its self-pressurization control pipeline.

[0013] The third electric valve, the booster valve, the level transmitter, and the first pressure transmitter are respectively connected to the PLC control system.

[0014] As a third limitation, a fourth electric valve, a first pressure gauge, and a second pressure transmitter are sequentially installed on the total output pipeline;

[0015] The fourth electric valve, the first pressure gauge, and the second pressure transmitter are respectively connected to the PLC control system.

[0016] As a further limitation, a third shut-off valve is also provided on the main output pipeline; the third shut-off valve is connected to the PLC control system.

[0017] As a fourth limitation, the pressure regulating valve group includes a main pressure regulating pipeline, a backup pressure regulating pipeline, and a bypass pressure regulating pipeline; the inlet and outlet pipelines of the pressure regulating valve group are connected to the main pressure regulating pipeline, the backup pressure regulating pipeline, and the bypass pressure regulating pipeline.

[0018] A second pressure gauge is installed on the inlet pipe of the pressure regulating valve group, and a third pressure gauge and a third safety valve are installed on the outlet pipe of the pressure regulating valve group.

[0019] The main pressure regulating pipeline and the backup pressure regulating pipeline are each equipped with a fourth safety valve, a fourth shut-off valve, a self-regulating valve, and a fifth shut-off valve; the bypass pressure regulating pipeline is equipped with a sixth shut-off valve.

[0020] The second pressure gauge, the third pressure gauge, the third safety valve, the fourth safety valve, the fourth shut-off valve, the self-regulating valve, the fifth shut-off valve, and the sixth shut-off valve are respectively connected to the PLC control system.

[0021] As a fifth limitation, the automatic gas supply system of the liquid oxygen supply station also includes an alarm, which is connected to the PLC control system.

[0022] The technological advancements achieved by this invention compared to existing technologies, due to the adoption of the aforementioned technical solution, are as follows:

[0023] (1) This utility model includes at least two liquid oxygen storage tanks, a vaporizer group, a pressure regulating valve group and a PLC control system; the vaporizer group includes a main vaporizer and an auxiliary vaporizer. The main vaporizer is equipped with a first electric valve on the main vaporization input pipe and a first temperature transmitter on the main vaporization output pipe; the auxiliary vaporizer is equipped with a second electric valve on the auxiliary vaporization input pipe and a second temperature transmitter on the auxiliary vaporization output pipe; by setting temperature transmitters on the main vaporization output pipe and the auxiliary vaporization output pipe respectively, the PLC control system can switch the main vaporizer and the auxiliary vaporizer according to the real-time temperature, so as to avoid the problem of incomplete vaporization caused by severe frost on the vaporizer;

[0024] (2) This utility model includes at least two liquid oxygen storage tanks. Each liquid oxygen storage tank is equipped with a third electric valve on its liquid oxygen output pipeline. Each liquid oxygen storage tank is also equipped with a level transmitter and a first pressure transmitter. Each liquid oxygen storage tank is equipped with a pressure boosting valve on its self-pressurization control pipeline. By setting the level transmitter and the first pressure transmitter, the liquid level and pressure values ​​of the liquid oxygen storage tank can be uploaded to the PLC control system. The PLC control system controls the pressure boosting valve to increase or decrease pressure according to the pressure value of the liquid oxygen storage tank, so as to ensure the pressure balance in the liquid oxygen storage tank. The PLC control system also controls the opening and closing of the third electric valve of the liquid oxygen storage tank according to the liquid level value of the liquid oxygen storage tank, and automatically switches to the other liquid oxygen storage tank for gas supply.

[0025] (3) This utility model includes an alarm. When the PLC control system controls the third electric valve switch of the liquid oxygen storage tank according to the liquid level of the liquid oxygen storage tank and automatically switches to another liquid oxygen storage tank for gas supply, the PLC control system controls the alarm to issue a reliable alarm to remind the on-duty personnel to carry out the liquid filling operation.

[0026] (4) The present invention is equipped with a third shut-off valve on the main output pipeline, which can quickly cut off the gas source in an emergency to ensure gas supply safety;

[0027] (5) The present invention has a fourth electric valve, a first pressure gauge and a second pressure transmitter installed in sequence on the main output pipeline. By installing the second pressure transmitter, the PLC control system can control the alarm to issue a reliable alarm when the pressure deviates from the design value, so as to remind the on-duty personnel to deal with it quickly.

[0028] In summary, this utility model is suitable for providing long-term, uninterrupted, and safe gas supply to liquid oxygen supply stations, ensuring continuous and stable gas supply, high safety performance, ease of operation, and no need for constant on-site monitoring. Attached Figure Description

[0029] Figure 1 The diagram shown is a structural schematic of an embodiment of this utility model.

[0030] In the diagram: 1. Liquid oxygen storage tank; 2. Main vaporizer; 3. Auxiliary vaporizer; 4. Pressure regulating valve assembly; 5. Liquid oxygen output pipeline; 6. Main vaporization input pipeline; 7. Auxiliary vaporization input pipeline; 8. Main vaporization output pipeline; 9. Auxiliary vaporization output pipeline; 10. Inlet pipeline; 11. Outlet pipeline; 12. Main output pipeline; 13. First safety valve; 14. First electric valve; 15. First shut-off valve; 16. First temperature transmitter; 17. Second safety valve; 18. Second electric valve; 19. 20. Second shut-off valve; 21. Second temperature transmitter; 22. Third electric valve; 23. Level transmitter; 24. First pressure transmitter; 25. Booster valve; 26. Third shut-off valve; 27. Fourth electric valve; 28. First pressure gauge; 29. ​​Second pressure transmitter; 30. Second pressure gauge; 31. Third pressure gauge; 32. Third safety valve; 33. Fourth safety valve; 34. Fourth shut-off valve; 35. Self-regulating valve; 36. Fifth shut-off valve; 37. Sixth shut-off valve. Detailed Implementation

[0031] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1: An automatic gas supply system for a liquid oxygen supply station

[0033] like Figure 1 As shown, this embodiment is an automatic gas supply system for a liquid oxygen supply station, including at least two liquid oxygen storage tanks 1, a vaporizer group, a pressure regulating valve group 4, a PLC control system and an alarm; wherein, the vaporizer group includes a main vaporizer 2 and an auxiliary vaporizer 3, and the alarm is connected to the PLC control system.

[0034] The inlet of each liquid oxygen storage tank 1 is connected to the liquid oxygen tanker truck through a liquid oxygen input pipeline. The outlet of each liquid oxygen storage tank 1 is connected to the main vaporization input pipeline 6 of the main vaporizer 2 and the auxiliary vaporization input pipeline 7 of the auxiliary vaporizer 3 through a liquid oxygen output pipeline 5. The main vaporization output pipeline 8 of the main vaporizer 2 and the auxiliary vaporization output pipeline 9 of the auxiliary vaporizer 3 are connected to the inlet pipeline 10 of the pressure regulating valve group 4. The outlet pipeline 11 of the pressure regulating valve group 4 is connected to each gas consumption point through a general output pipeline 12.

[0035] The main vaporizer 2 has a first safety valve 13 and a first electric valve 14 installed on its main vaporization input pipe 6, and a first shut-off valve 15 and a first temperature transmitter 16 installed on its main vaporization output pipe 8. The auxiliary vaporizer 3 has a second safety valve 17 and a second electric valve 18 installed on its auxiliary vaporization input pipe 7, and a second shut-off valve 19 and a second temperature transmitter 20 installed on its auxiliary vaporization output pipe 9. The first safety valve 13, first electric valve 14, first shut-off valve 15, first temperature transmitter 16, second safety valve 17, second electric valve 18, second shut-off valve 19, and second temperature transmitter 20 are all connected to a PLC control system and controlled by the PLC system according to a set program. In this embodiment, the main vaporizer 2 and auxiliary vaporizer 3 can be of models ranging from AW-50 to AW-200, selected based on the specific gas supply volume.

[0036] Each liquid oxygen storage tank 1 is equipped with a third electric valve 21 on its liquid oxygen output pipeline 5, and each liquid oxygen storage tank 1 is also equipped with a level transmitter 22 and a first pressure transmitter 23. Each liquid oxygen storage tank 1's self-pressurization control pipeline is equipped with a pressure boosting valve 24. The third electric valve 21, pressure boosting valve 24, level transmitter 22, and first pressure transmitter 23 are all connected to a PLC control system, which controls them according to a set program.

[0037] In this embodiment, the model of liquid oxygen storage tank 1 can be CVV10-16 to CVV10-1315, and the specific selection is made according to the gas supply volume. The valves and equipment in liquid oxygen storage tank 1 are all existing technologies and are part of liquid oxygen storage tank 1, and will not be described in detail here.

[0038] The main output pipeline 12 is equipped with a third shut-off valve 25, a fourth electric valve 26, a first pressure gauge 27, and a second pressure transmitter 28. The fourth electric valve 26, the first pressure gauge 27, the second pressure transmitter 28, and the third shut-off valve 25 are all connected to a PLC control system, which controls them according to a pre-set program. The third shut-off valve 25 on the main output pipeline 12 allows for rapid shut-off of the gas supply in emergencies, ensuring gas supply safety. The second pressure transmitter 28 allows the PLC control system to reliably trigger an alarm when the pressure deviates from the design value, alerting on-duty personnel to take immediate action.

[0039] The pressure regulating valve assembly 4 is equipped with three sets of pressure regulating pipelines, including a main pressure regulating pipeline, a backup pressure regulating pipeline, and a bypass pressure regulating pipeline. The inlet pipeline 10 and outlet pipeline 11 of the pressure regulating valve assembly 4 are connected to the main pressure regulating pipeline, the backup pressure regulating pipeline, and the bypass pressure regulating pipeline. A second pressure gauge 29 is installed on the inlet pipeline 10 of the pressure regulating valve assembly 4, and a third pressure gauge 30 and a third safety valve 31 are installed on the outlet pipeline 11. A fourth safety valve 32, a fourth shut-off valve 33, a self-regulating valve 34, and a fifth shut-off valve 35 are installed on both the main and backup pressure regulating pipelines. A sixth shut-off valve 36 is installed on the bypass pressure regulating pipeline. The second pressure gauge 29, the third pressure gauge 30, the third safety valve 31, the fourth safety valve 32, the fourth shut-off valve 33, the self-regulating valve 34, the fifth shut-off valve 35, and the sixth shut-off valve 36 are all connected to a PLC control system and controlled by the PLC control system according to a set program.

[0040] In this embodiment, two liquid oxygen storage tanks 1 are provided, but in practice, multiple tanks can be provided as needed.

[0041] The usage process in this embodiment is as follows: When the liquid oxygen supply station supplies gas, the PLC control system opens the third electric valve 21 on one of the liquid oxygen storage tanks 1, the first safety valve 13 and the first electric valve 14 on the main vaporization input pipeline 6, the first shut-off valve 15 on the main vaporization output pipeline 8, the valves of the main pressure regulating pipeline in the pressure regulating valve group 4, the third safety valve 31, and the third shut-off valve 25 and the fourth electric valve 26 on the total output pipeline 12. After the liquid oxygen supply station is connected, the liquid oxygen in the liquid oxygen storage tank 1 is vaporized by the main vaporizer 2 to obtain oxygen. The output pressure of the oxygen is regulated by the pressure regulating valve group 4, and finally the oxygen is input to each gas consumption point through the total output pipeline 12.

[0042] During the liquid oxygen supply process, the first temperature transmitter 16 on the main vaporization output pipeline 8 of the main vaporizer 2 transmits the temperature information of the main vaporization output pipeline 8 to the PLC control system in real time. When the temperature is lower than the set temperature, the PLC control system closes the first safety valve 13 and the first electric valve 14 on the main vaporization input pipeline 6 and the first shut-off valve 15 on the main vaporization output pipeline 8, and opens the second safety valve 17 and the second electric valve 18 on the auxiliary vaporization input pipeline 7 of the auxiliary vaporizer 3 and the second shut-off valve 19 on the auxiliary vaporization output pipeline 9, thereby switching between the main vaporizer 2 and the auxiliary vaporizer 3. This avoids the problem of incomplete vaporization caused by excessively low temperature and severe frost on the main vaporizer 2. At the same time, the PLC control system controls the alarm to issue an alarm signal to remind the on-duty personnel to defrost the main vaporizer 2. When the temperature information detected by the second temperature transmitter 20 on the auxiliary vaporization output pipe 9 of the auxiliary vaporizer 3 is transmitted to the PLC control system, if the temperature is too low, the PLC control system switches the main vaporizer 2 and the auxiliary vaporizer 3 again. The PLC control system repeats the switching process according to the temperature.

[0043] During operation, the level transmitter 22 and the first pressure transmitter 23 on the liquid oxygen storage tank 1 transmit the liquid level and pressure values ​​of the currently used liquid oxygen storage tank 1 to the PLC control system in real time. The PLC control system controls the pressure boosting valve 24 of the liquid oxygen storage tank 1 to increase or decrease pressure according to the pressure value, ensuring pressure balance inside the liquid oxygen storage tank 1. It also controls the opening and closing of the third electric valve 21 of the liquid oxygen storage tank 1 according to the liquid level value. When the liquid level of the liquid oxygen storage tank 1 being used is lower than the set value, the PLC control system opens the third electric valve 21 on another liquid oxygen storage tank 1 and closes the third electric valve 21 on the liquid oxygen storage tank 1 being used, automatically switching to the other liquid oxygen storage tank 1 for gas supply. At the same time, the PLC control system controls the alarm to issue an alarm signal to remind the on-duty personnel to perform the liquid filling operation.

[0044] It should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic gas supply system for a liquid oxygen supply station, characterized in that, The automatic gas supply system of the liquid oxygen supply station includes at least two liquid oxygen storage tanks, a vaporizer group, a pressure regulating valve group, and a PLC control system; the vaporizer group includes a main vaporizer and an auxiliary vaporizer; The inlet of each liquid oxygen storage tank is connected to the liquid oxygen tanker through a liquid oxygen input pipeline. The outlet of each liquid oxygen storage tank is connected to the main vaporization input pipeline of the main vaporizer and the auxiliary vaporization input pipeline of the auxiliary vaporizer through a liquid oxygen output pipeline. The main vaporization output pipeline of the main vaporizer and the auxiliary vaporization output pipeline of the auxiliary vaporizer are respectively connected to the inlet pipeline of the pressure regulating valve group. The outlet pipeline of the pressure regulating valve group is connected to each gas consumption point through a main output pipeline. The main vaporizer is equipped with a first electric valve on its main vaporization input pipe and a first temperature transmitter on its main vaporization output pipe; the auxiliary vaporizer is equipped with a second electric valve on its auxiliary vaporization input pipe and a second temperature transmitter on its auxiliary vaporization output pipe. The first electric valve, the first temperature transmitter, the second electric valve, and the second temperature transmitter are respectively connected to the PLC control system.

2. The automatic gas supply system for a liquid oxygen supply station according to claim 1, characterized in that, The main vaporizer is equipped with a first safety valve on its main vaporization input pipe and a first shut-off valve on its main vaporization output pipe; the auxiliary vaporizer is equipped with a second safety valve on its auxiliary vaporization input pipe and a second shut-off valve on its auxiliary vaporization output pipe. The first safety valve, the first shut-off valve, the second safety valve, and the second shut-off valve are respectively connected to the PLC control system.

3. The automatic gas supply system for a liquid oxygen supply station according to claim 1 or 2, characterized in that, Each of the liquid oxygen storage tanks is equipped with a third electric valve on its liquid oxygen output pipeline, and each liquid oxygen storage tank is equipped with a level transmitter and a first pressure transmitter. Each liquid oxygen storage tank is also equipped with a pressure boosting valve on its self-pressurization control pipeline. The third electric valve, the booster valve, the level transmitter, and the first pressure transmitter are respectively connected to the PLC control system.

4. The automatic gas supply system for a liquid oxygen supply station according to claim 1 or 2, characterized in that, The main output pipeline is sequentially equipped with a fourth electric valve, a first pressure gauge, and a second pressure transmitter. The fourth electric valve, the first pressure gauge, and the second pressure transmitter are respectively connected to the PLC control system.

5. The automatic gas supply system for a liquid oxygen supply station according to claim 4, characterized in that, A third shut-off valve is also installed on the main output pipeline; the third shut-off valve is connected to the PLC control system.

6. The automatic gas supply system for a liquid oxygen supply station according to claim 1 or 2, characterized in that, The pressure regulating valve group includes a main pressure regulating pipeline, a backup pressure regulating pipeline, and a bypass pressure regulating pipeline; the inlet and outlet pipelines of the pressure regulating valve group are connected to the main pressure regulating pipeline, the backup pressure regulating pipeline, and the bypass pressure regulating pipeline. A second pressure gauge is installed on the inlet pipe of the pressure regulating valve group, and a third pressure gauge and a third safety valve are installed on the outlet pipe of the pressure regulating valve group. The main pressure regulating pipeline and the backup pressure regulating pipeline are each equipped with a fourth safety valve, a fourth shut-off valve, a self-regulating valve, and a fifth shut-off valve; the bypass pressure regulating pipeline is equipped with a sixth shut-off valve. The second pressure gauge, the third pressure gauge, the third safety valve, the fourth safety valve, the fourth shut-off valve, the self-regulating valve, the fifth shut-off valve, and the sixth shut-off valve are respectively connected to the PLC control system.

7. The automatic gas supply system for a liquid oxygen supply station according to claim 1 or 2, characterized in that, The automatic gas supply system of the liquid oxygen supply station also includes an alarm, which is connected to the PLC control system.

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