Helium filling device

Abstract

The utility model discloses a helium filling device which comprises a main pipeline and a third branch connected with the main pipeline, the end, away from the third branch, of the main pipeline is connected with a high-purity helium inlet, and the third branch is provided with a high-purity helium buffer tank, a loading compressor and a helium filling crane pipe which are sequentially connected. The third branch is further connected with a helium filling crane pipe through a fifth connecting pipeline and a sixth connecting pipeline, and valves are arranged on the third branch, the fifth connecting pipeline and the sixth connecting pipeline. According to the utility model, the pressure equalization of the connecting end of the high-pressure buffer tank and the helium filling crane pipe, namely the movable tube bundle vehicle, can be realized through the valve, the pressure of the gas in the high-pressure buffer tank can be reduced through the pressure reducing valve, and the pressure of the gas in the high-pressure buffer tank can be increased through the compressor, so that the negative-pressure filling of the movable tube bundle vehicle is realized, and the filling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas filling technical field more particularly to a helium filling device. BACKGROUND

[0002] Helium is rare inert gas, has very important use in nuclear magnetic resonance, optical fiber, submarine, aviation, spaceflight, scientific research and nuclear weapon etc. high and sharp field. At present stage, the helium purified by many helium extraction devices needs to be stored and sold by being subpackaged in multiple groups of gas storage tanks, and the traditional helium filling system has defects and needs to be improved.

[0003] The defects of the existing helium subpackaging filling system are:

[0004] 1. The mobile pipe bundle vehicle stays on site for a long time during the filling process of the existing helium multifunctional filling system, and the cost is high;

[0005] 2. The existing helium multifunctional filling system needs to disassemble the metal hose during the filling process of the mobile pipe bundle vehicle, and the high-pressure danger is great;

[0006] 3. The existing helium multifunctional filling system cannot recycle the helium replaced by evacuation, and the helium is wasted greatly;

[0007] 4. The existing helium multifunctional filling system cannot store non-high-purity helium. CONTENT OF THE UTILITY MODEL

[0008] The technical problem to be solved by the utility model is how to improve the filling efficiency of the mobile pipe bundle vehicle.

[0009] The utility model solves the above technical problems through the following technical scheme: a helium filling device, comprising a main pipeline and a branch three connected with the main pipeline, wherein one end of the main pipeline away from the branch three is connected with a high-purity helium inlet, a high-purity helium buffer tank, a loading compressor and a helium filling crane pipe are sequentially connected on the branch three, the branch three is further connected with the helium filling crane pipe through a fifth connecting pipeline and a sixth connecting pipeline, and valves are arranged on the branch three, the fifth connecting pipeline and the sixth connecting pipeline.

[0010] As a preferred technical scheme, the input end and the output end of the helium filling crane pipe are respectively provided with a helium filling crane pipe inlet and a helium filling crane pipe outlet, and a helium filling crane pipe pressure relief valve is further arranged downstream of the helium filling crane pipe outlet.

[0011] As a preferred technical scheme, the main pipeline is further connected with a branch two and a branch one connected in parallel with the branch three, a low-purity helium buffer tank inlet cut-off valve and a low-purity helium buffer tank are sequentially connected on the branch one, and a mobile cylinder group filling cut-off valve and a mobile cylinder group or a cylinder are sequentially connected on the branch two.

[0012] As a preferred technical solution, the system also includes a vacuum pump and a gas chromatograph. The vacuum pump is connected to a helium filling arm via a first connecting pipe, a second connecting pipe to a branch line two, and a third connecting pipe to a branch line one. The gas chromatograph is connected to the main line, branch line one, branch line two, and branch line three via a fourth connecting pipe, and a fifth connecting pipe to branch line one. Valves are provided on the first, second, third, and fourth connecting pipes.

[0013] As a preferred technical solution, the low-purity helium buffer tank is connected to the inlet of the depressurization gas return system through return pipeline five, and branch line three is connected to return pipeline five through return pipeline three and return pipeline four.

[0014] As a preferred technical solution, the vacuum pump and the gas chromatograph are respectively connected to the inlet of the depressurization gas return system through return pipeline one and return pipeline two.

[0015] As a preferred technical solution, the fifth connecting pipe and the sixth connecting pipe are connected in parallel, and the fifth connecting pipe is equipped with a pressure equalization shut-off valve.

[0016] As a preferred technical solution, the third branch is further equipped with a high-purity helium buffer tank filling shut-off valve, a high-purity helium buffer tank inlet manual valve, a loading compressor inlet shut-off valve, and a high-purity helium buffer tank pressure reducing valve. The high-purity helium buffer tank filling shut-off valve is located upstream of the high-purity helium buffer tank inlet manual valve, the high-purity helium buffer tank inlet manual valve is located upstream of the high-purity helium buffer tank, the loading compressor inlet shut-off valve is located upstream of the high-purity helium buffer tank pressure reducing valve, and the high-purity helium buffer tank pressure reducing valve is located upstream of the loading compressor.

[0017] As a preferred technical solution, the main pipeline is also equipped with an air inlet shut-off valve and a high-pressure helium flow meter.

[0018] As a preferred technical solution, the return pipeline five is equipped with a low-purity helium buffer tank pressure relief valve and a pressure relief and pressure reducing valve. The low-purity helium buffer tank pressure relief valve is located upstream of the connection end between the return pipeline five and the return pipeline four, and the pressure relief and pressure reducing valve is located downstream of the connection end between the return pipeline five and the return pipeline three.

[0019] The beneficial effects of this utility model are as follows:

[0020] (1) In this utility model, the pressure equalization between the high pressure buffer tank and the helium filling arm, i.e. the connection end of the mobile tube bundle vehicle, can be achieved by the valve. The pressure of the gas in the high pressure buffer tank can be reduced by the valve, and the pressure of the gas can be increased by the compressor, thereby realizing negative pressure filling of the mobile tube bundle vehicle and improving the filling efficiency.

[0021] (2) In this utility model, by setting a filling arm and a pressure relief valve at the outlet of the helium filling arm, the operation safety is improved compared with the metal hose filling of the existing device.

[0022] (3) In this utility model, by setting a return pipeline one at the outlet of the evacuation pump, the low-purity helium gas replaced by evacuation can be recovered to the front-end system for purification and reuse. By setting a return pipeline two, a return pipeline three, a return pipeline four, and a return pipeline five, helium gas can be recovered and reused, thereby improving the gas utilization rate.

[0023] (4) In this utility model, the mixing of high-purity helium and low-purity helium during the filling process is avoided by setting up a low-purity helium buffer tank and a low-purity helium buffer tank inlet shut-off valve. Attached Figure Description

[0024] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0025] Reference numerals: 101. Vacuum pump; 102. Gas chromatograph; 103. Mobile cylinder assembly; 104. Truck-mounted compressor; 105. High-purity helium buffer tank; 106. Mobile tube bundle vehicle; 107. High-pressure helium flow meter; 108. Low-purity helium buffer tank; 109. Helium filling arm; 201. Inlet shut-off valve; 202. Mobile cylinder assembly filling shut-off valve; 203. High-purity helium buffer tank filling shut-off valve; 2 04. Inlet shut-off valve of the loading compressor; 205. Inlet sampling shut-off valve; 206. Outlet sampling shut-off valve; 207. Pressure equalization shut-off valve; 208. Vacuuming hand valve for the mobile cylinder group; 209. Vacuuming hand valve for the high-pressure buffer tank; 210. Inlet hand valve for the high-purity helium buffer tank; 211. Outlet hand valve for the loading compressor; 212. Pressure relief hand valve for the high-purity helium buffer tank; 213. Pressure relief hand valve for the mobile tube bundle vehicle; 214. Mobile tube bundle vehicle... 215. Hand valve for vacuuming the gas loading arm; 216. Sampling pressure reducing valve; 217. Pressure relief valve for high-purity helium buffer tank; 218. Pressure relief valve for low-purity helium buffer tank; 219. Pressure relief valve for helium filling arm; 220. Hand valve for vacuum pump outlet; 221. Inlet shut-off valve for low-purity helium buffer tank; 301. High-purity helium inlet; 302. Inlet for mobile cylinder assembly; 303. Inlet for vacuum pump; 304. Inlet for gas chromatograph. 305. Depressurization gas return system inlet; 306. Helium filling arm inlet; 307. High-purity helium buffer tank inlet; 308. High-purity helium buffer tank outlet; 309. Loading compressor inlet; 310. Loading compressor outlet; 311. Low-purity helium buffer tank inlet; 312. Helium filling arm outlet; 313. Low-purity helium buffer tank outlet; 314. Vacuum pump outlet; 315. Gas chromatograph outlet. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] See Figure 1 A helium filling device includes a main pipeline connected to a high-pressure helium flow meter 107 and an inlet shut-off valve 201. One end of the main pipeline has a high-purity helium inlet 301, and the other end is connected in parallel to three branches: branch one, branch two, and branch three. Branch one is equipped with a low-purity helium buffer tank 108, with an inlet 311 and an outlet 313 at its input and output ends, respectively. The other end of branch one is connected to the inlet 305 of the depressurization gas return system. Branch one also has a low-purity helium buffer tank inlet shut-off valve 221, located upstream of the inlet 311. The low-purity helium buffer tank 108 and the inlet shut-off valve 221 prevent the mixing of high-purity and low-purity helium during the filling process.

[0028] The other end of the branch line is connected to a mobile cylinder group 103 or a cylinder. The input end of the mobile cylinder group 103 is provided with a mobile cylinder group inlet 302. The branch line is provided with a mobile cylinder group filling shut-off valve 202.

[0029] Branch line three is sequentially connected to a high-purity helium buffer tank filling shut-off valve 203, a high-purity helium buffer tank inlet manual valve 210, a high-purity helium buffer tank 105, a loading compressor inlet shut-off valve 204, a high-purity helium buffer tank pressure reducing valve 217, a loading compressor 104, a loading compressor outlet manual valve 211, and a helium filling arm 109. The helium filling arm 109 is used to connect to the mobile tube bundle vehicle 106; the input end and output end of the high-purity helium buffer tank 105 are connected to the loading arm 106. The high-purity helium buffer tank inlet 307 and high-purity helium buffer tank outlet 308 are respectively provided at the output end. The loading compressor 104 has a loading compressor inlet 309 and loading compressor outlet 310 at the input end and output end respectively. The helium loading arm 109 has a helium loading arm inlet 306 and helium loading arm outlet 312 at the input end and output end respectively. Downstream of the helium loading arm outlet 312, there is also a helium loading arm pressure relief valve 219.

[0030] By incorporating the helium filling arm 109 and the helium filling arm pressure relief valve 219, operational safety is improved compared to using a metal hose for filling.

[0031] The evacuation pump 101 has an inlet 303 and an outlet 314 at its input and output ends, respectively. The evacuation pump 101 is connected to the helium filling arm 109 via a first connecting pipe, which is equipped with a evacuation hand valve 214 for the mobile tube bundle. The evacuation pump 101 is connected to branch two via a second connecting pipe, which is equipped with a evacuation hand valve 208 for the mobile cylinder group. The connection end of the second connecting pipe to branch two is located downstream of the mobile cylinder group filling shut-off valve 202. The evacuation pump 101 is connected to branch one via a third connecting pipe, which is equipped with a evacuation hand valve 209 for the high-pressure buffer tank. The connection end of the second connecting pipe to branch one is located upstream of the inlet 307 of the high-purity helium buffer tank.

[0032] The gas chromatograph 102 is connected to the main pipeline, branch pipeline 1, branch pipeline 2, and branch pipeline 3 through the fourth connecting pipeline. The input end and output end of the gas chromatograph 102 are respectively provided with a gas chromatograph inlet 304 and a gas chromatograph outlet 315. The fourth connecting branch is provided with an inlet sampling cut-off valve 205 and a sampling pressure reducing valve 215. The gas chromatograph 102 is connected to branch pipeline 1 through the fifth connecting pipeline. The fifth connecting pipeline is provided with a pressure equalization cut-off valve 207. The connection end of the fifth connecting pipeline and branch pipeline 1 is located downstream of the connection end of the second connecting pipeline and branch pipeline 1.

[0033] The fourth connecting pipe and the fifth connecting pipe are connected in parallel. The sampling pressure reducing valve 215 is located downstream of the parallel end of the fourth connecting pipe and the fifth connecting pipe. The fifth connecting pipe is also connected to the branch three-way connector through the sixth connecting pipe. The sixth connecting pipe is equipped with an outlet sampling shut-off valve 206.

[0034] The vacuum pump outlet 314 is connected to the pressure relief gas return system inlet 305 via return pipeline one. Return pipeline one is equipped with a vacuum pump outlet manual valve 220. The gas chromatograph outlet 315 is connected to the pressure relief gas return system inlet 305 via return pipeline two. Branch pipeline three is connected to the pressure relief gas return system inlet 305 via return pipeline three. The connection point between return pipeline three and branch pipeline three is located downstream of the on-board compressor 104. Return pipeline three is equipped with a mobile tube bundle vehicle pressure relief manual valve 213. Branch pipeline three is also connected to the pressure relief gas return system inlet 305 via return pipeline four. The connection point between front pipeline four and branch pipeline three is located downstream of the outlet 308 of the high-purity helium buffer tank and upstream of the inlet 309 of the loading compressor. Front return pipeline four and front return pipeline five are connected in parallel. Front return pipeline four is equipped with a high-purity helium buffer tank pressure relief valve 212. The outlet 313 of the low-purity helium buffer tank is connected to the inlet 305 of the pressure relief gas return system through front return pipeline five. Front return pipeline five is equipped with a low-purity helium buffer tank pressure relief valve 218. Front return pipeline five is also equipped with a pressure relief and pressure reducing valve 216, which is located downstream of the connection point between front return pipeline four and front return pipeline five.

[0035] By setting up return pipeline 1, return pipeline 2, return pipeline 3, return pipeline 4, and return pipeline 5, helium can be recovered and reused, thus improving gas utilization rate.

[0036] How to use:

[0037] High-pressure buffer tank 105 filling process: First, open the inlet shut-off valve 201, the high-purity helium buffer tank filling shut-off valve 203, and the high-purity helium buffer tank inlet manual valve 210 in sequence to start filling the high-purity helium buffer tank 105 with helium.

[0038] Mobile cylinder group 103 filling process: First, connect the mobile cylinder group 103 or the cylinder to the inlet 302 of the mobile cylinder group through the filling hose. Then, open the inlet shut-off valve 201 and the mobile cylinder group filling shut-off valve 202 in sequence to start filling the mobile cylinder group 103 with helium. Finally, after the filling is completed, close the inlet shut-off valve 201 and the mobile cylinder group filling shut-off valve 202 in sequence and remove the mobile cylinder group 103. The filling is now complete.

[0039] Mobile tube bundle trolley 106 filling process: When the high-purity helium buffer tank 105 is filled with helium to 150 Barg, the mobile tube bundle trolley 106 is positioned and connected to the mobile tube bundle trolley 106 via the helium filling arm 109. Then, the pressure equalization shut-off valve 207 is opened to deliver helium from the high-purity helium buffer tank 105 into the mobile tube bundle trolley 106. Once pressure equalization is complete, i.e., the pressure in the high-pressure buffer tank 105 equals the pressure in the mobile tube bundle trolley 106, the pressure equalization shut-off valve 207 is closed. The loading compressor inlet shut-off valve 204 and the high-purity helium buffer tank pressure reducing valve 217 are opened to release the remaining helium in the high-purity helium buffer tank 105. After the gas is depressurized to 5 Barg, it is then compressed to 200 Barg by the loading compressor 104 and transported to the mobile tube bundle vehicle 106 for helium filling through branch pipe three. When the mobile tube bundle vehicle 106 is full of helium, the loading compressor inlet shut-off valve 204 and the high-purity helium buffer tank pressure reducing valve 217 are closed to stop the helium filling of the mobile tube bundle vehicle 106. The pressure relief hand valve 213 of the mobile tube bundle vehicle is opened to release the helium in the pipeline to the front system through the return front pipeline three and the pressure relief gas return front system inlet 305. After ensuring that there is no pressure in the pipeline, the helium filling arm outlet 312 is removed and the mobile tube bundle vehicle 106 drives out of the helium filling area to complete the helium filling.

[0040] Gas detection procedure: If it is necessary to fill the high-pressure buffer tank 105 with helium for detection, open the sampling cut-off valve 205 and the sampling pressure reducing valve 215 on the fourth connecting pipeline to reduce the pressure to 1 Barg and then transport it through the pipeline to the gas chromatograph 102 for detection; if it is necessary to detect the helium in the mobile tube bundle cart 106, open the outlet sampling cut-off valve 206 and the sampling pressure reducing valve 215 on the sixth connecting pipeline to reduce the pressure to 1 Barg and then transport it through the pipeline to the gas chromatograph 102 for detection.

[0041] During normal operation, the high-pressure buffer tank 105 is filled with helium for testing. If the purity does not meet 99.999% (He), the inlet shut-off valve 221 of the low-purity helium buffer tank opens, storing the low-purity helium in the low-purity helium buffer tank 108. When the purity meets 99.999% (He), the filling shut-off valve 203 of the high-purity helium buffer tank opens, storing the high-purity helium in the high-purity helium buffer tank 105. The helium emitted during the testing process is returned to the front system through the return pipeline 2 for recycling. Similarly, the waste helium in the impure low-purity helium buffer tank 108 can be returned to the front system for recycling by opening the low-purity helium buffer tank pressure relief valve 218 and adjusting the pressure relief and pressure reducing valve 216.

[0042] Depressurization process: If the helium in the mobile tube bundle cart 106 is found to be insufficient to meet the requirements for high-purity helium, the helium in the mobile tube bundle cart 106 needs to be depressurized. First, open the depressurization hand valve 213 and the depressurization and pressure reducing valve 216 of the mobile tube bundle cart to release the impure helium back to the front system for further purification. Then, the mobile tube bundle cart 106 is replaced and rinsed.

[0043] The displacement and washing process includes the following steps:

[0044] S1. Pressure relief: Open the pressure relief hand valve 213 and pressure relief and pressure reducing valve 216 of the mobile tube bundle vehicle to release the pressure in the mobile tube bundle vehicle 106 to 1 Barg;

[0045] S2. Evacuation: Open the evacuation pump 101 and the evacuation hand valve 214 of the mobile tube bundle vehicle to evacuate and replace the mobile tube bundle vehicle 106. The time is about 2 hours. The extracted waste helium can be transported to the front system for recycling through pipeline.

[0046] S3. Backfilling: Open the equalization shut-off valve 207 and use the high-purity helium in the high-purity helium buffer tank 105 to backfill the pressure in the mobile tube bundle vehicle to 2 Barg. After mixing for 0.5 hours, return to S1 and repeat the cycle 3 to 4 times to complete the replacement and flushing operation.

[0047] It should be noted that in this embodiment, high-purity helium, low-purity helium, etc. are all technical terms, and shut-off valve, manual valve, pressure reducing valve, and pressure relief valve are all valves.

[0048] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A helium filling device, characterized in that, It includes a main pipeline and a third branch pipeline connected to the main pipeline. The end of the main pipeline away from the third branch pipeline is connected to a high-purity helium inlet. The third branch pipeline is equipped with a high-purity helium buffer tank, a loading compressor, and a helium filling arm connected in sequence. The third branch pipeline is also connected to the helium filling arm via a fifth connecting pipeline and a sixth connecting pipeline. Valves are provided on the third branch pipeline, the fifth connecting pipeline, and the sixth connecting pipeline.

2. The helium filling device according to claim 1, characterized in that, The helium loading arm has an inlet and an outlet at its input and output ends, respectively, and a pressure relief valve is provided downstream of the outlet.

3. The helium filling device according to claim 1, characterized in that, The main pipeline is also connected to branch line 2 and branch line 1, which are connected in parallel with branch line 3. Branch line 1 is connected in sequence to the inlet shut-off valve of the low-purity helium buffer tank and the low-purity helium buffer tank. Branch line 2 is connected in sequence to the filling shut-off valve of the mobile cylinder group, the mobile cylinder group or the cylinder.

4. A helium filling device according to claim 3, characterized in that, It also includes a vacuum pump and a gas chromatograph. The vacuum pump is connected to a helium filling arm via a first connecting pipe, a second connecting pipe to a branch line two, and a third connecting pipe to a branch line one. The gas chromatograph is connected to the main line, branch line one, branch line two, and branch line three via a fourth connecting pipe, and a fifth connecting pipe to branch line one. Valves are provided on the first, second, third, and fourth connecting pipes.

5. A helium filling device according to claim 3, characterized in that, The low-purity helium buffer tank is connected to the inlet of the depressurization gas return system via return pipeline five, and branch line three is connected to return pipeline five via return pipeline three and return pipeline four.

6. A helium filling device according to claim 4, characterized in that, The vacuum pump and gas chromatograph are connected to the inlet of the depressurized gas return system via return line one and return line two, respectively.

7. A helium filling device according to claim 1, characterized in that, The fifth connecting pipe and the sixth connecting pipe are connected in parallel, and the fifth connecting pipe is equipped with a pressure equalization shut-off valve.

8. A helium filling device according to claim 1, characterized in that, The third branch is also equipped with a high-purity helium buffer tank filling shut-off valve, a high-purity helium buffer tank inlet manual valve, a loading compressor inlet shut-off valve, and a high-purity helium buffer tank pressure reducing valve. The high-purity helium buffer tank filling shut-off valve is located upstream of the high-purity helium buffer tank inlet manual valve, the high-purity helium buffer tank inlet manual valve is located upstream of the high-purity helium buffer tank, the loading compressor inlet shut-off valve is located upstream of the high-purity helium buffer tank pressure reducing valve, and the high-purity helium buffer tank pressure reducing valve is located upstream of the loading compressor.

9. A helium filling device according to claim 1, characterized in that, The main pipeline is also equipped with an air inlet shut-off valve and a high-pressure helium flow meter.

10. A helium filling device according to claim 5, characterized in that, The return pipeline five is equipped with a low-purity helium buffer tank pressure relief valve and a pressure relief and pressure reducing valve. The low-purity helium buffer tank pressure relief valve is located upstream of the connection end between the return pipeline five and the return pipeline four, and the pressure relief and pressure reducing valve is located downstream of the connection end between the return pipeline five and the return pipeline three.

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