Oxygen filling device

Abstract

The utility model belongs to an oxygen filling device. Comprising a liquid oxygen cold storage tank connected with a tank car, the liquid oxygen cold storage tank is connected with a high-pressure temperature control vaporizer through a high-pressure hydraulic pump and a buffer tank, and the high-pressure temperature control vaporizer is connected with a plurality of bulk oxygen bottle filling positions and container filling positions through a filling cabinet; a residual gas emptying part and a vacuumizing part are arranged in the filling cabinet; the residual gas emptying part is used for storing and transporting oxygen in the plurality of bulk oxygen bottle filling positions and the container filling positions; the device has the characteristics that the filling efficiency is improved, and the final oxygen purity is prevented from being influenced by pollution of the oxygen storage and transportation device during device conversion.

Description

Technical Field

[0001] This utility model belongs to the field of gas oxygen filling technology, and in particular relates to a gas oxygen filling device. Background Technology

[0002] The existing gaseous oxygen filling process basically involves directly pressurizing the gaseous oxygen storage tank or production equipment with a pump and then sending it into mobile storage devices such as gas cylinders for filling. The above filling method is simple, convenient, and fast. However, in actual filling, the presence of residual gas in the mobile storage device leads to the problem of substandard oxygen purity after filling. To solve the above technical problem, existing companies have specially set up residual gas venting devices for the mobile storage devices. After the residual gas in the mobile storage device is vented, it is placed in the filling device for filling. The above process not only has the problem of low filling efficiency, but also makes it very easy for oxygen contamination to occur during the conversion between the two sets of equipment. Utility Model Content

[0003] This utility model provides a gaseous oxygen filling device to solve the technical problems mentioned in the background art.

[0004] The technical solution of this utility model is as follows:

[0005] An oxygen filling device includes: a liquid oxygen cold storage tank connected to a tank truck; the liquid oxygen cold storage tank is connected to a high-pressure temperature-controlled vaporizer via a high-pressure hydraulic pump and a buffer tank; the high-pressure temperature-controlled vaporizer is connected to a filling cabinet and several bulk oxygen cylinder filling positions and container filling positions; the filling cabinet is provided with a residual gas venting section for the oxygen storage and transportation devices in the several bulk oxygen cylinder filling positions and container filling positions, and a vacuuming section.

[0006] The beneficial effects of this utility model are as follows: This utility model has a filling cabinet between the high-pressure temperature-controlled vaporizer and several bulk oxygen cylinder filling positions and container filling positions. The filling cabinet is used to vent and vacuum the oxygen storage and transportation device. The above treatment can realize the venting, vacuuming and filling of the oxygen storage and transportation device in several bulk oxygen cylinder filling positions and container filling positions with the cooperation of the filling cabinet, so as to improve the filling efficiency and avoid the contamination of the oxygen storage and transportation device during the conversion device, which would affect the final oxygen purity.

[0007] Preferably, the filling cabinet is equipped with a main filling pipeline with a main filling valve. The main filling pipeline is connected to several filling branch pipelines, and the filling branch pipelines are connected to the bulk oxygen cylinder filling position or the container filling position through several branch pipelines with work position valves.

[0008] Preferably, the residual gas venting section includes a sub-filling valve located on the filling sub-pipeline. The sub-filling valve is located on the side closer to the main filling pipeline, and a first tee is located on the side of the sub-filling valve away from the main filling pipeline. The third end of the first tee is connected to the venting pipeline through a divergence valve.

[0009] Preferably, the first tee on each of the plurality of filling sub-pipelines is connected to the same venting pipeline through its corresponding divergence valve.

[0010] Preferably, the vacuum pumping unit includes a second three-way valve disposed between the third end of the first three-way valve and the divergence valve, wherein the third end of the second three-way valve is connected to the air inlet of the vacuum pump via a vacuum valve.

[0011] Preferably, a second tee is provided between the first tee on each of the plurality of filling sub-pipelines and its corresponding divergence valve, and the third ends of the plurality of second tee are connected to the air inlet of the same vacuum pump through their respective corresponding vacuum valves.

[0012] Preferably, a third tee is provided between the high-pressure temperature-controlled vaporizer and the main filling valve, and the third end of the third tee is connected to the main venting pipe through the main venting valve.

[0013] Preferably, both the bulk oxygen cylinder filling position and the container filling position are equipped with a filling housing, and a temperature sensor is installed inside the filling housing.

[0014] Preferably, the filling shell is provided with a condensed oxygen inlet channel, which is connected to the end of the cooling main pipe through a cooling branch pipe with a cooling branch valve. A main cooling valve is provided in the middle of the cooling main pipe, and the first end of the cooling main pipe is connected to the return gas pipe of the high-pressure hydraulic pump. A fourth tee is provided between the return gas pipe and the first end of the cooling main pipe, and the third end of the fourth tee is connected to the return gas port of the liquid oxygen cold storage tank. The filling shell is also provided with an oxygen venting pipe with a venting valve.

[0015] This utility model also includes a PLC control system. The signal input terminal of the PLC control system is connected to the temperature sensor, and the signal output terminal of the PLC control system is connected to the audible and visual alarm, the main cooling valve, and the main filling valve, respectively.

[0016] According to the above scheme, a gaseous oxygen filling device is manufactured. This utility model is applicable to the filling of gaseous oxygen. It can realize the venting, vacuuming and filling of gas cylinders or containers under the action of the same filling cabinet during the filling process, thereby ensuring filling efficiency and reducing the risk of oxygen pollution. Furthermore, this utility model can be applied to the method of converting liquid oxygen into gaseous oxygen for filling. This filling method can be the direct filling of liquid phase produced in the enterprise. At the same time, the coldness of liquid oxygen can be used to cool the oxygen storage and transportation device during the filling process, so as to improve the filling efficiency under the premise of safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a block diagram illustrating the working principle of this utility model.

[0019] Labels in the diagram: 1. Liquid oxygen cold storage tank; 2. High-pressure hydraulic pump; 3. Buffer tank; 4. High-pressure temperature-controlled vaporizer; 5. Filling cabinet; 6. Bulk oxygen cylinder filling position; 7. Container filling position; 8. Main filling valve; 9. Main filling pipeline; 10. Branch filling pipeline; 11. Work position valve; 12. Branch pipeline; 13. Distributed filling valve; 14. Dispersing valve; 15. Drainage pipeline; 16. Vacuum valve; 17. Vacuum pump ; 18. Main vent valve; 19. Main vent pipe; 20. Filling housing; 21. Temperature sensor; 22. Condensed oxygen inlet channel; 23. Cooling branch valve; 24. Cooling branch pipe; 25. Cooling main pipe; 26. Main cooling valve; 27. Return gas pipe; 28. Vent valve; 29. ​​PLC control system; 30. Audible and visual alarm; 31. First tee; 32. Second tee; 33. Third tee. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figure 1-2 As shown, this utility model is an oxygen filling device, which includes: a liquid oxygen cold storage tank 1 connected to a tank truck; the liquid oxygen cold storage tank 1 is connected to a high-pressure temperature-controlled vaporizer 4 via a high-pressure hydraulic pump 2 and a buffer tank 3; the high-pressure temperature-controlled vaporizer 4 is connected to a plurality of bulk oxygen cylinder filling positions 6 and a container filling position 7 via a filling cabinet 5; the filling cabinet 5 is provided with a residual gas venting section for the oxygen storage and transportation devices in the plurality of bulk oxygen cylinder filling positions 6 and the container filling positions 7, and a vacuuming section. This invention is applicable to the filling of gaseous oxygen, and is particularly suitable for direct oxygen filling by liquid oxygen production enterprises. The liquid oxygen produced by the enterprise's liquid oxygen production unit is stored in the liquid oxygen cold storage tank 1 as liquid oxygen. The oxygen storage and transportation device described in this invention can be a gas cylinder or a container. During filling, the gas cylinder or container is placed on the corresponding work station and installed together. First, the gas cylinder or container is vented using the residual gas venting section in the filling cabinet 5. Then, the gas cylinder or container is evacuated using the vacuuming section. Finally, the liquid oxygen from the liquid oxygen cold storage tank 1 is pressurized by the high-pressure hydraulic pump 2. After pressurization, the liquid oxygen is vaporized by the high-pressure temperature-controlled vaporizer 4. Finally, it is filled through the filling cabinet 5. In this invention, the gas cylinder or container can achieve venting, vacuuming, and filling in one installation, which has the characteristics of improving work efficiency, avoiding equipment conversion, reducing the risk of oxygen pollution, and ensuring the purity of oxygen after filling.

[0026] Furthermore, the filling cabinet 5 is equipped with a main filling pipeline 9 with a main filling valve 8. The main filling pipeline 9 is connected to several filling branch pipelines 10, and the filling branch pipelines 10 are connected to the bulk oxygen cylinder filling positions 6 or the container filling positions 7 through several branch pipelines 12 with position valves 11. This arrangement enables the main filling pipeline 9 in the filling cabinet 5 to fill multiple sets of bulk oxygen cylinder filling positions 6 or container filling positions 7 individually or simultaneously, thereby improving filling efficiency.

[0027] Furthermore, the residual gas venting section includes a dispensing filling valve 13 installed on the filling branch line 10. The dispensing filling valve 13 is located on the side closer to the main filling line 9, and a first tee 31 is provided on the side of the dispensing filling valve 13 away from the main filling line 9. The third end of the first tee 31 is connected to the venting pipe 15 through a divergence valve 14. This arrangement enables the venting of residual gas from the bulk oxygen cylinders and the container compartments.

[0028] Furthermore, the first tee 31 on each of the several filling sub-lines 10 is connected to the same venting pipeline 15 via its corresponding venting valve 14. This configuration enables the individual or centralized venting of residual gas from one or more sets of bulk oxygen cylinders and their compartments.

[0029] Furthermore, the vacuum pumping unit includes a second three-way valve 32 disposed between the third end of the first three-way valve 31 and the divergence valve 14. The third end of the second three-way valve 32 is connected to the air inlet of the vacuum pump 17 via a vacuum valve 16. By providing the vacuum pumping unit, the vented bulk oxygen cylinders and containers can be processed, thereby ensuring the complete removal of residual gas from the bulk oxygen cylinders and containers, and guaranteeing the quality of the oxygen after filling.

[0030] Furthermore, each of the several filling branch lines 10 is provided with a second three-way valve 32 between the first three-way valve 31 and its corresponding divergence valve 14. The third ends of the several second three-way valves 32 are connected to the air inlet of the same vacuum pump 17 through their respective vacuum valves 16. Through the above arrangement, it is possible to achieve the purpose of individually or centrally evacuating one or more groups of bulk oxygen cylinders and residual gas in the container after venting.

[0031] Furthermore, a third three-way valve 33 is provided between the high-pressure temperature-controlled vaporizer 4 and the main filling valve 8, and the third end of the third three-way valve 33 is connected to the main venting pipe 19 through the main venting valve 18. As is well known, the gas cylinder may heat up during the filling process. When this happens, the pressure inside the gas cylinder drops after cooling. This may cause gas backflow, affecting the safety of the operator. In addition, the gas cylinder pressure drops, requiring repeated filling time and reducing filling efficiency. This utility model, by setting up a mechanism, can close the main filling valve 8 and open the main venting valve 18 when the gas cylinder heats up, stopping the system and simultaneously releasing the oxygen in the high-pressure temperature-controlled vaporizer 4 in a timely manner.

[0032] Furthermore, both the bulk oxygen cylinder filling position 6 and the container filling position 7 are equipped with a filling housing 20, and a temperature sensor 21 is installed inside the filling housing 20. This utility model achieves the purpose of safe filling by setting the temperature sensor 21 to monitor the temperature in the filling housing 20 in real time.

[0033] Furthermore, the filling shell 20 is provided with a condensed oxygen inlet channel 22, which is connected to the end of the cooling main pipe 25 via a cooling branch pipe 24 with a cooling branch valve 23. A main cooling valve 26 is provided in the middle of the cooling main pipe 25. The first end of the cooling main pipe 25 is connected to the return gas pipe 27 of the high-pressure hydraulic pump 4. A fourth tee 34 is provided between the return gas pipe 27 and the first end of the cooling main pipe 25. The third end of the fourth tee 34 is connected to the return gas port of the liquid oxygen cold storage tank 1. The filling shell 20 is also provided with an oxygen venting pipe with a venting valve 28. This invention, through the above-mentioned configuration, can cool down the heated gas cylinder, thereby improving operator safety and filling efficiency. The oxygen entering the filling shell 20 for cooling can be directly discharged through the oxygen venting pipe with the venting valve 28.

[0034] This utility model also includes a PLC control system 29. The signal input terminal of the PLC control system 29 is connected to the temperature sensor 21, and the signal output terminal of the PLC control system 29 is connected to the audible and visual alarm 30, the main cooling valve 26, and the main filling valve 8, respectively.

[0035] The working principle of this utility model is as follows: When using this utility model, the oxygen storage and transportation device is first vented, then vacuumed, and finally filled. Specifically, the gas cylinder is placed on the bulk oxygen cylinder filling position 6 and tightly connected; the container is placed on the container filling position 7 and tightly connected; the corresponding valves, station valve 11, and divergence valve 14 on the oxygen storage and transportation device are opened; the main filling valve 8 and the corresponding sub-filling filling valve 13 (including the vacuum valve 16) are closed; the residual gas in the oxygen storage and transportation device enters the venting pipeline 15 through the station valve 11 and divergence valve 14 for venting. The venting process described in this utility model can be carried out on a single filling branch pipeline 10, or... The process is carried out on multiple filling sub-lines 10; after venting, a vacuum process is performed. The corresponding valves, station valves 11, and vacuum valves 16 on the oxygen storage and transportation device are opened, while the main filling valve 8 and the corresponding sub-filling valves 13 (including the divergence valve 14) are closed. The vacuum pump 17 is then turned on, and the residual gas in the oxygen storage and transportation device enters the vacuum pump 17 through the station valves 11 and vacuum valves 16 for vacuuming. The vacuuming process described in this invention can be performed on one filling sub-line 10 or multiple filling sub-lines 10. After vacuuming, the high-pressure hydraulic pump 2 is turned on. The high-pressure hydraulic pump 2 pressurizes the liquid oxygen from the liquid oxygen cold storage tank 1, and after pressurization, the liquid oxygen is vaporized through the high-pressure temperature-controlled vaporizer 4. Gaseous oxygen enters the oxygen storage and transportation device through the main filling valve 8 and the corresponding work position valve 11. The filling process described in this utility model can be carried out on one filling branch line 10 or multiple filling branch lines 10. During the filling process, the temperature sensor 21 monitors the temperature inside the filling shell 20 and transmits the temperature data to the PLC control system 29. When the temperature exceeds a certain level, the PLC control system 29 controls the audible and visual alarm 30 to sound an alarm and opens the main cooling valve 26. The low-temperature oxygen in the return gas pipeline 27 of the high-pressure hydraulic pump 4 enters the filling shell 20 through the cooling main pipe 25, cooling branch pipe 24, and condensed oxygen inlet channel 22, so that the gas cylinders and collection cylinders in the filling shell 20 are filled. The filling chamber is cooled to improve filling safety and efficiency. During the cooling process, the temperature sensor 21 monitors the temperature inside the filling chamber 20 in real time and transmits the temperature data to the PLC control system 29. When the temperature continues to rise and exceeds the predetermined temperature, the PLC control system 29 controls the audible and visual alarm 30 to continue to sound an alarm, closes the main cooling valve 26 and the main filling valve 8, and simultaneously shuts down the high-pressure hydraulic pump 2 and opens the main vent valve 18 to stop the system and vent the oxygen in the system. When the temperature of the filling chamber 20 drops to the preset threshold during the cooling process, the PLC control system 29 controls the audible and visual alarm 30 to turn off, closes the main cooling valve 26, and continues filling oxygen.This utility model features a simple structure, reasonable design, efficient oxygen filling, and guaranteed oxygen quality after filling.

[0036] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, this utility model will not explain the control method and circuit connection in detail. The external controller mentioned in the specification can play a control role for the electrical components mentioned in this article, and the external controller is a conventional known device.

[0037] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. An oxygen filling device, characterized in that: The device includes: The liquid oxygen cold storage tank (1) connected to the tank truck, The liquid oxygen cold storage tank (1) is connected to the high-pressure temperature-controlled vaporizer (4) via a high-pressure hydraulic pump (2) and a buffer tank (3). The high-pressure temperature-controlled vaporizer (4) is connected to several bulk oxygen cylinder filling positions (6) and container filling positions (7) via the filling cabinet (5); The filling cabinet (5) is equipped with a residual gas venting section for filling several bulk oxygen cylinders (6) and oxygen storage and transportation devices in the container filling section (7), as well as a vacuum section.

2. The oxygen filling device according to claim 1, characterized in that: The filling cabinet (5) is equipped with a main filling pipeline (9) with a main filling valve (8). The main filling pipeline (9) is connected to several filling branch pipelines (10). The filling branch pipelines (10) are connected to the bulk oxygen cylinder filling position (6) or the container filling position (7) through several branch pipelines (12) with station valves (11).

3. The oxygen filling device according to claim 2, characterized in that: The residual gas venting section includes a sub-filling valve (13) installed on the filling sub-line (10). The sub-filling valve (13) is installed on the side close to the filling main line (9). A first tee (31) is installed on the side of the sub-filling valve (13) away from the filling main line (9). The third end of the first tee (31) is connected to the venting pipe (15) through a divergence valve (14).

4. The oxygen filling device according to claim 3, characterized in that: The first tee (31) on each of the several filling sub-pipes (10) is connected to the same venting pipe (15) through its corresponding divergence valve (14).

5. The oxygen filling device according to claim 3, characterized in that: The vacuum pumping unit includes a second three-way valve (32) disposed between the third end of the first three-way valve (31) and the divergence valve (14). The third end of the second three-way valve (32) is connected to the air inlet of the vacuum pump (17) through the vacuum valve (16).

6. The oxygen filling device according to claim 3, characterized in that: Each of the first tee (31) on the plurality of filling sub-pipes (10) is provided with a second tee (32) between it and its corresponding divergence valve (14). The third ends of the plurality of second tee (32) are connected to the air inlet of the same vacuum pump (17) through their respective corresponding vacuum valves (16).

7. The oxygen filling device according to claim 2, characterized in that: A third tee (33) is provided between the high-pressure temperature-controlled vaporizer (4) and the main filling valve (8), and the third end of the third tee (33) is connected to the main venting pipe (19) through the main venting valve (18).

8. The oxygen filling device according to claim 1, characterized in that: Both the bulk oxygen cylinder filling position (6) and the container filling position (7) are equipped with filling housings (20), and a temperature sensor (21) is provided inside the filling housing (20).

9. The oxygen filling device according to claim 8, characterized in that: The filling shell (20) is provided with a condensed oxygen inlet channel (22). The condensed oxygen inlet channel (22) is connected to the end of the cooling main pipe (25) through a cooling branch pipe (24) with a cooling branch valve (23). A main cooling valve (26) is provided in the middle of the cooling main pipe (25). The first end of the cooling main pipe (25) is connected to the return gas pipe (27) of the high pressure hydraulic pump (4). A fourth tee (34) is provided between the return gas pipe (27) and the first end of the cooling main pipe (25). The third end of the fourth tee (34) is connected to the return gas port of the liquid oxygen cold storage tank (1). The filling housing (20) is also equipped with an oxygen venting pipe with a venting valve (28).

10. The oxygen filling device according to claim 9, characterized in that: It also includes a PLC control system (29), the signal input terminal of the PLC control system (29) is connected to the temperature sensor (21), and the signal output terminal of the PLC control system (29) is connected to the audible and visual alarm (30), the main cooling valve (26) and the main filling valve (8) respectively.

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