Nitrous oxide filling system

Abstract

The utility model relates to a nitrous oxide filling system. The nitrous oxide filling system comprises a storage tank, a liquid pump, an analysis pipeline, a nitrous oxide gas pipeline, a vacuum pipeline, a recovery pipeline, a nitrous oxide liquid pipeline and a filling panel, and the filling panel is used for filling a tank car or a steel cylinder. A nitrous oxide gas pipeline, a recovery pipeline, a vacuum pipeline, a nitrous oxide liquid pipeline and an analysis pipeline are arranged on the filling panel. According to the nitrous oxide filling system, purging, positive pressure maintaining and negative pressure maintaining in the nitrous oxide filling process are achieved, and the nitrous oxide filling purity and the safety in the filling process are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of filling systems, and in particular relates to a nitrous oxide filling system. Background Art

[0002] Nitrous oxide, a colorless, sweet-smelling gas, also known as laughing gas, is an oxidant with a chemical formula of N 2 O, can support combustion under certain conditions, but is stable at room temperature and has a slight anesthetic effect. Its anesthetic effect was discovered by British chemist Humphry Davy in 1799. The gas was used for anesthesia in dental surgery in the early days, and is now used in surgery and dentistry for anesthesia and analgesia. The name "laughing gas" is due to the euphoria caused by inhaling it and the ability to make people laugh. Nitrous oxide is soluble in water, ethanol, ether and concentrated sulfuric acid. It is also used as an oxidizer in rockets and racing cars, and to increase engine output. It should be noted that nitrous oxide is a powerful greenhouse gas, 296 times more effective than carbon dioxide.

[0003] Before transporting nitrous oxide, it needs to be filled into a tank truck or a steel cylinder. The Chinese utility model patent with the authorization announcement number CN214369273U discloses a filling system for nitrous oxide, which includes a raw material tank, a recovery tank, a first cryogenic liquid pump and a second cryogenic liquid pump. The discharge end of the raw material tank is connected to a first pipeline, and the upper end of the side of the recovery tank is provided with a recovery port. The output end of the first cryogenic liquid pump is connected to a second pipeline, and the second pipeline between the first single-line valve and the second hand valve is connected to a filling pipeline. The filling system of nitrous oxide transports the raw material in the raw material tank to the filling pipeline by setting a first cryogenic liquid pump, thereby filling the steel cylinder through a single flush pipeline, and the loss of raw materials can be effectively reduced through the coordinated use of the first hand valve, the second hand valve, the third hand valve and the fourth hand valve, and through the recovery pipeline and the second pipeline, the overflowed raw materials can be transported to the recovery tank. However, the filling system does not have a purging and pressure-maintaining process, and the safety of the filling process is difficult to be effectively guaranteed. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a nitrous oxide filling system.

[0005] The technical solution of a nitrous oxide filling system of the utility model is:

[0006] A nitrous oxide filling system includes a storage tank, a liquid pump, an analysis pipeline, a nitrous oxide gas pipeline, a vacuum pipeline, a recovery pipeline, a nitrous oxide liquid pipeline, and a filling panel. The filling panel is used for filling a tank truck or a cylinder. The filling panel is provided with a nitrous oxide gas pipeline, a recovery pipeline, a vacuum pipeline, a nitrous oxide liquid pipeline, and an analysis pipeline. The nitrous oxide gas pipeline is communicated with the nitrous oxide gas pipeline. The nitrous oxide liquid pipeline is communicated with the nitrous oxide liquid pipeline. The analysis pipeline is communicated with the analysis pipeline. The vacuum pipeline is communicated with the vacuum pipeline. The recovery pipeline is communicated with the recovery pipeline. The storage tank is provided with a liquid outlet pipe and an exhaust pipe. The liquid inlet of the liquid pump is communicated with the liquid outlet pipe through a first connecting pipe, the liquid outlet is communicated with the nitrous oxide liquid pipeline through a second connecting pipe, and the gas outlet is communicated with the exhaust pipe through a third connecting pipe. The third connecting pipe is communicated with the nitrous oxide gas pipeline.

[0007] Further, the filling panel has a filling pipe. The nitrous oxide gas pipeline, the recovery pipeline, the vacuum pipeline, the nitrous oxide liquid pipeline, and the analysis pipeline are arranged in parallel and are respectively communicated with the filling pipe.

[0008] Further, a safety pipeline is provided on the filling pipe, and a safety valve is provided on the safety pipeline.

[0009] Further, a first regulating valve and a first manual valve are provided on the nitrous oxide gas pipeline, a second regulating valve and a second manual valve are provided on the recovery pipeline, a third regulating valve and a third manual valve are provided on the vacuum pipeline, a fourth regulating valve and a fourth manual valve are provided on the nitrous oxide liquid pipeline, and a fifth regulating valve and a fifth manual valve are provided on the analysis pipeline.

[0010] Further, a sixth manual valve is provided on the first connecting pipe, a seventh manual valve is provided on the second connecting pipe, and an eighth manual valve is provided on the third connecting pipe.

[0011] The present utility model provides a nitrous oxide filling system, and its beneficial effects are as follows:

[0012] The nitrous oxide filling system of the present utility model realizes purging, positive pressure maintaining, and negative pressure maintaining during the nitrous oxide filling process by setting a nitrous oxide gas pipeline, a vacuum pipeline, a recovery pipeline, and a nitrous oxide liquid pipeline, and the filling panel realizes the above functions by setting a nitrous oxide gas pipeline, a recovery pipeline, a vacuum pipeline, and a nitrous oxide liquid pipeline. The nitrous oxide in the storage tank enters the nitrous oxide liquid pipeline through the liquid pump, and the nitrous oxide in the storage tank enters the nitrous oxide gas pipeline. The nitrous oxide filling system of the present utility model improves the purity of nitrous oxide filling and the safety of the filling process. Description of the Drawings

[0013] Figure 1 It is the process structure diagram of the nitrous oxide filling system of the present utility model;

[0014] Figure 2 It is the process structure diagram of filling in the nitrous oxide filling system of the present utility model;

[0015] In the figure: 1, storage tank; 2, liquid pump; 3, first connecting pipe; 4, second connecting pipe; 5, third connecting pipe; 6, nitrous oxide liquid pipeline; 7, recovery pipeline; 8, vacuum pipeline; 9, nitrous oxide gas pipeline; 10, analysis pipeline; 11, nitrous oxide liquid pipeline; 12, recovery pipeline; 13, vacuum pipeline; 14, nitrous oxide gas pipeline; 15, analysis pipeline; 16, safety pipeline; 17, first regulating valve; 18, first manual valve; 19, second regulating valve; 20, second manual valve; 21, third regulating valve; 22, third manual valve; 23, fourth regulating valve; 24, fourth manual valve; 25, fifth regulating valve; 26, fifth manual valve; 27, safety valve; 28, sixth manual valve; 29, seventh manual valve; 30, eighth manual valve; 31, filling panel. Specific embodiments

[0016] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0017] Specific embodiments of the nitrous oxide filling system of the present utility model, as Figure 1 , Figure 2 shown, include a storage tank 1, a liquid pump 2, an analysis pipeline 10, a nitrous oxide gas pipeline 9, a vacuum pipeline 8, a recovery pipeline 7, a nitrous oxide liquid pipeline 6, and a filling panel 31. The filling panel 31 is used for filling a tank truck or a steel cylinder. The filling panel 31 is provided with a nitrous oxide gas pipeline 14, a recovery pipeline 12, a vacuum pipeline 13, a nitrous oxide liquid pipeline 11, and an analysis pipeline 15. The nitrous oxide gas pipeline 14 is communicated with the nitrous oxide gas pipeline 9. The nitrous oxide liquid pipeline 11 is communicated with the nitrous oxide liquid pipeline 6. The analysis pipeline 15 is communicated with the analysis pipeline 10. The vacuum pipeline 13 is communicated with the vacuum pipeline 8. The recovery pipeline 12 is communicated with the recovery pipeline 7. The storage tank 1 is provided with a liquid outlet pipe and an exhaust pipe. The liquid inlet of the liquid pump 2 is communicated with the liquid outlet pipe through the first connecting pipe 3. The liquid outlet is communicated with the nitrous oxide liquid pipeline 6 through the second connecting pipe 4. The gas outlet is communicated with the exhaust pipe through the third connecting pipe 5. The third connecting pipe 5 is communicated with the nitrous oxide gas pipeline 9.

[0018] The filling panel 31 is provided with a filling pipe. The nitrous oxide gas pipeline 14, the recovery pipeline 12, the vacuum pipeline 13, the nitrous oxide liquid pipeline 11 and the analysis pipeline 15 are arranged in parallel and are respectively communicated with the filling pipe. A safety pipeline 16 is provided on the filling pipe, and a safety valve 27 is provided on the safety pipeline 16. A first regulating valve 17 and a first manual valve 18 are provided on the nitrous oxide gas pipeline 14, a second regulating valve 19 and a second manual valve 20 are provided on the recovery pipeline 12, a third regulating valve 21 and a third manual valve 22 are provided on the vacuum pipeline 13, a fourth regulating valve 23 and a fourth manual valve 24 are provided on the nitrous oxide gas pipeline 14, and a fifth regulating valve 25 and a fifth manual valve 26 are provided on the analysis pipeline 15. A sixth manual valve 28 is provided on the first connecting pipe 3, a seventh manual valve 29 is provided on the second connecting pipe 4, and an eighth manual valve 30 is provided on the third connecting pipe 5.

[0019] In this embodiment, there are multiple filling panels 31, and pressure transmitters are arranged on the filling panels 31. The pressure transmitters are used to transmit the pressure signals of each pipeline in the filling panels 31.

[0020] When the nitrous oxide filling system of the present utility model is in use,

[0021] First, connect the tank truck or cylinder to the filling panel 31, ensure that the connection hose interface is perpendicular to the valve interface, tighten the nut by hand until there are 2 - 3 threads left of the thread, and finally lock the nut with a torque wrench, with the torque set at 18 N·M. Clear the tare weight of the cylinder of the weighing system and check that the manual valves of each pipeline are in the open state.

[0022] Select the connection filling position, select the automatic or manual filling mode, click on automatic and confirm, click on the purge option, and the filling panel 31 automatically opens the manual valve on the vacuum pipeline 13 to conduct vacuum pumping. When the pressure in the vacuum pipeline 13 drops to -0.08 MPa and stabilizes for 10 S, the manual valve on the vacuum pipeline 13 is automatically closed. After maintaining the pressure for 10 minutes, if the pressure fluctuates within ±1%, it is qualified, then the negative pressure pressure maintenance is successful and the next action is automatically carried out. If the negative pressure pressure maintenance fails, the program will automatically stop and the panel will prompt that the negative pressure pressure maintenance fails, and the operator checks the pipeline.

[0023] Open the manual valve on the nitrous oxide gas pipeline 14, pressurize the connection between the cylinder valve after connection (pressure ≥ 1.5 MPa), then close the finished gas valve, maintain the pressure for 5 minutes, and if the pressure fluctuates within ±1%, it is qualified; when the pressure reduction value is greater than 1%, the program terminates and prompts the operator to check the connection pipe;

[0024] Close the manual valve on the recovery pipeline 12 to recover the nitrous oxide gas in the filling panel 31 until the pressure drops to 0.05 MPa. Then the manual valve on the recovery pipeline 12 will automatically close, and the manual valve on the vacuum pipeline 13 will be opened to evacuate the air. When the pressure in the pipe drops to -0.08 MPa and stabilizes for 10 s, the manual valve on the vacuum pipeline 13 will automatically close.

[0025] Open the manual valve on the nitrous oxide gas pipeline 14. After the pressure stabilizes, delay for 10 s and then open the manual valve on the recovery pipeline 12. When the pressure drops to 0.05 MPa, the manual valve on the recovery pipeline 12 will automatically close, and the manual valve on the vacuum pipeline 13 will be opened to evacuate the air. When the pressure in the pipe drops to -0.08 MPa and stabilizes for 10 s, close the manual valve on the vacuum pipeline 13. Automatically perform the above operations three times to complete the gas replacement of the panel, and then prompt the operator that the panel replacement is completed and proceed to the next step.

[0026] Manually open the cylinder valve for the operator to check the residual gas pressure (≥0.2 MPa) and record it. After the residual gas pressure is qualified, manually open the analysis valve for residual gas analysis. If the analysis is qualified, start the filling.

[0027] If the residual gas analysis is unqualified, open the manual valve on the recovery pipeline 12 to recover the gas to the buffer tank. After the pressure in the steel cylinder is released to ≤0.05 MPa, close the manual valve on the recovery pipeline 12. Open the manual valve on the vacuum pipeline 13 to evacuate the air for more than one hour and then continue the filling.

[0028] After the residual gas analysis is qualified, open the manual valve on the nitrous oxide liquid pipeline 11 to start filling high-purity nitrous oxide liquid. When the mass on the weighing system reaches the set weight, close the manual valve on the nitrous oxide liquid pipeline 11 and give an audible and visual alarm to indicate the end of filling.

[0029] After the filling is completed, the filling panel 31 will prompt for the analysis operation. The operator contacts the analyst and manually opens the analysis valve. After the analysis is qualified, the panel confirms the completion of the analysis and prompts to close the valve of the tank truck or Y cylinder and confirm.

[0030] After the operator clicks to confirm, open the manual valve on the recovery pipeline 12 to reduce the panel pipeline pressure to 0.05 MPa. If the panel pipeline pressure is still higher than 2 MPa after the recovery pneumatic valve is opened for 3 s, automatically close the manual valve on the recovery pipeline 12 and prompt the operator to check whether the valve of the tank truck or the steel cylinder is closed.

[0031] After the panel pipeline pressure drops to 0.05 MPa, the pneumatic valve on the recovery pipeline 12 will automatically close, and the valve on the vacuum pipeline 13 will automatically open. When the panel pipeline pressure drops to -0.01 MPa, the pneumatic valve on the vacuum pipeline 13 will automatically close, and then prompt to close the root valve of the filling hose and confirm. After confirmation, it will display the end of filling.

[0032] The nitrous oxide filling system of the present utility model is provided with a nitrous oxide gas pipeline 9, a vacuum pipeline 8, a recovery pipeline 7, and a nitrous oxide liquid pipeline 6. The filling panel 31 is provided with a nitrous oxide gas pipeline 14, a recovery pipeline 12, a vacuum pipeline 13, and a nitrous oxide liquid pipeline 11. The nitrous oxide in the storage tank 1 enters the nitrous oxide liquid pipeline 6 through the liquid pump 2, and the nitrous oxide in the storage tank 1 enters the nitrous oxide gas pipeline 9. The nitrous oxide filling system of the present utility model realizes purging, positive pressure maintaining, and negative pressure maintaining during the nitrous oxide filling process, improving the purity of nitrous oxide filling and the safety of the filling process.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A nitrous oxide filling system, characterized in that: It includes a storage tank, a liquid pump, an analysis pipeline, a nitrous oxide gas pipeline, a vacuum pipeline, a recovery pipeline, a nitrous oxide liquid pipeline and a filling panel. The filling panel is used to fill a tank truck or a steel cylinder. The filling panel is provided with a nitrous oxide gas pipeline, a recovery pipeline, a vacuum pipeline, a nitrous oxide liquid pipeline and an analysis pipeline. The nitrous oxide gas pipeline is connected to the nitrous oxide gas pipeline, the nitrous oxide liquid pipeline is connected to the nitrous oxide liquid pipeline, the analysis pipeline is connected to the analysis pipeline, the vacuum pipeline is connected to the vacuum pipeline, the recovery pipeline is connected to the recovery pipeline, and a liquid outlet pipe and an exhaust pipe are provided on the storage tank. The liquid inlet of the liquid pump is connected to the liquid outlet pipe through a first connecting pipe, the liquid outlet is connected to the nitrous oxide liquid pipeline through a second connecting pipe, the air outlet is connected to the exhaust pipe through a third connecting pipe, and the third connecting pipe is connected to the nitrous oxide gas pipeline.

2. The nitrous oxide filling system according to claim 1, characterized in that: The filling panel has a filling pipe, and the nitrous oxide gas pipeline, recovery pipeline, vacuum pipeline, nitrous oxide liquid pipeline and analysis pipeline are arranged in parallel and are respectively connected to the filling pipe.

3. The nitrous oxide filling system according to claim 2, characterized in that: The filling pipe is provided with a safety pipeline, and the safety pipeline is provided with a safety valve.

4. The nitrous oxide filling system according to claim 2, characterized in that: The nitrous oxide gas pipeline is provided with a first regulating valve and a first manual valve, the recovery pipeline is provided with a second regulating valve and a second manual valve, the vacuum pipeline is provided with a third regulating valve and a third manual valve, the nitrous oxide gas pipeline is provided with a fourth regulating valve and a fourth manual valve, and the analysis pipeline is provided with a fifth regulating valve and a fifth manual valve.

5. The nitrous oxide filling system according to claim 1, characterized in that: The first connecting pipe is provided with a sixth hand valve, the second connecting pipe is provided with a seventh hand valve, and the third connecting pipe is provided with an eighth hand valve.

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