CN109945070B - Helium recovery device - Google Patents
Helium recovery device Download PDFInfo
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- CN109945070B CN109945070B CN201711385269.6A CN201711385269A CN109945070B CN 109945070 B CN109945070 B CN 109945070B CN 201711385269 A CN201711385269 A CN 201711385269A CN 109945070 B CN109945070 B CN 109945070B
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Abstract
The invention provides a helium gas recovery device which comprises a recovery system, a compression system, a filtering system, a storage system, a detection system, a helium supplementing system and an output system. The recovery system comprises a first control valve, a vacuum tank, a vacuum pump, a gas storage bag and a sensor, wherein the first control valve is connected with an external helium detection mechanism, the vacuum tank is connected with the first control valve, the vacuum pump is connected between the vacuum tank and the gas storage bag, and the sensor can detect the amount of helium in the gas storage bag. The compression system is communicated with the air storage bag and is controlled by the sensor, and the filtering system is connected between the compression system and the storage system. The output system comprises an output valve and an output pipeline connected to the output valve, the output pipeline is used for being connected to the helium detection mechanism, and the storage system is connected with the output valve. The detection system is coupled to the storage system and is configured to detect a helium concentration within the storage system. The helium supplementing system comprises a first gas storage tank and a second control valve, and the first gas storage tank is communicated with the gas storage bag through the second control valve.
Description
Technical Field
The invention relates to the field of helium recovery, in particular to a helium recovery device.
Background
Helium is currently used in many areas, for example, in battery production, and a helium leak detection system is commonly used to detect the tightness of the battery. However, the helium leak detection system has no recovery function, and the helium used for detection is usually high-concentration helium, which results in helium waste and increased use cost.
Disclosure of Invention
In view of the problems in the background art, an object of the present invention is to provide a helium gas recovery apparatus, which can rapidly recover helium gas and directly recycle the recovered helium gas, thereby effectively reducing helium gas loss and reducing cost.
In order to achieve the above object, the present invention provides a helium gas recovery device, which comprises a recovery system, a compression system, a filtration system, a storage system, a detection system, a helium replenishment system and an output system.
The recovery system comprises a first control valve, a vacuum tank, a vacuum pump, a gas storage bag and a sensor, wherein the first control valve is used for being connected with an external helium detection mechanism, the vacuum tank is connected with the first control valve, the vacuum pump is connected between the vacuum tank and the gas storage bag and can convey helium in the vacuum tank to the gas storage bag, and the sensor is arranged in the gas storage bag and can detect the helium amount in the gas storage bag.
The compression system is communicated with the gas storage bag and is controlled by the sensor, the filtering system is connected between the compression system and the storage system, the compression system compresses helium in the gas storage bag after receiving signals of the sensor, and the compressed helium is stored in the storage system after passing through the filtering system.
The output system comprises an output valve and an output pipeline connected with the output valve, the output pipeline is used for being connected to the helium detection mechanism, and the storage system is connected with the output valve.
The detection system is connected with the storage system and used for detecting the helium concentration in the storage system, and when the helium concentration reaches a set value, the output valve is connected and conveys helium to the helium detection mechanism.
The helium supplementing system comprises a first gas storage tank and a second control valve, wherein high-concentration helium gas is stored in the first gas storage tank and is communicated with the gas storage bag through the second control valve.
The invention has the following beneficial effects:
when the vacuum degree of the vacuum tank is lower than a set value, the vacuum pump works and vacuumizes the vacuum tank so that the vacuum degree of the vacuum tank reaches the set value. When one detection cycle of the helium detection mechanism is completed, the first control valve is switched on, and the helium in the helium detection mechanism can be quickly recovered because the vacuum tank is in high vacuum. Helium in the vacuum tank enters the gas storage bag under the suction action of the vacuum pump. The sensor can detect the helium amount in the gas storage bag in real time.
When the helium amount in the gas storage bag reaches a set value, the sensor obtains a signal and starts the compression system, the compression system compresses the helium and inputs the helium into the filtering system, and the helium filtered by the filtering system is stored in the storage system.
When the helium concentration in the storage system is lower than a set value, a second control valve of the helium supplementing system is switched on, high-concentration helium in the first gas storage tank enters the gas storage bag, then enters the storage system after passing through the compression system and the filtering system, so that the helium concentration in the storage system is increased and reaches the set value. When the helium concentration of the storage system reaches a set value, the output valve is switched on and helium is conveyed to the helium detection mechanism to be reused for the next cycle detection.
In a word, the helium recovery device can rapidly recover helium, directly recycle the recovered helium, effectively reduce helium loss and reduce cost.
Drawings
FIG. 1 is a schematic view of a helium recovery unit according to the present invention.
Wherein the reference numerals are as follows:
1 recovery System 5 detection System
11 first control valve 51 helium concentration detector
12 vacuum tank 52 fifth control valve
13 vacuum pump 53 sixth control valve
14 seventh control valve of gas storage bag 54
15 inductor 55 throttle valve
16 pressure reducing valve 6 helium supplementing system
17 first check valve 61 first air reservoir
2 second control valve of compression system 62
21 compressor 63 second check valve
22 accumulator 64 eighth control valve
23 third control valve 65 ninth control valve
3 fourth check valve of filtration system 66
Tenth control valve of 31-carbon filter 67
32 oil mist filter 7 output system
33 particulate filter 71 output valve
34 third check valve 72 output line
4 storage system A helium detection mechanism
41 second air tank B filter
42 fourth control valve
Detailed Description
The helium recovery device of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the helium gas recovery apparatus of the present invention includes a recovery system 1, a compression system 2, a filtration system 3, a storage system 4, a detection system 5, a helium replenishment system 6, and an output system 7.
The recovery system 1 comprises a first control valve 11, a vacuum tank 12, a vacuum pump 13, a gas storage bag 14 and a sensor 15, wherein the first control valve 11 is used for being connected with an external helium detection mechanism A, the vacuum tank 12 is connected with the first control valve 11, the vacuum pump 13 is connected between the vacuum tank 12 and the gas storage bag 14 and can convey helium in the vacuum tank 12 to the gas storage bag 14, and the sensor 15 is arranged on the gas storage bag 14 and can detect the amount of helium in the gas storage bag 14.
The compression system 2 is communicated with the gas storage bag 14 and is controlled by the sensor 15, the filtering system 3 is connected between the compression system 2 and the storage system 4, the compression system 2 compresses helium in the gas storage bag 14 after receiving signals of the sensor 15, and the compressed helium passes through the filtering system 3 and is stored in the storage system 4.
The output system 7 comprises an output valve 71 and an output pipeline 72 connected to the output valve 71, the output pipeline 72 is used for connecting to the helium detection mechanism A, and the storage system 4 is connected with the output valve 71.
The detection system 5 is connected with the storage system 4 and used for detecting the helium concentration in the storage system 4, and when the helium concentration reaches a set value, the output valve 71 is switched on and delivers helium to the helium detection mechanism A.
The helium replenishment system 6 includes a first gas tank 61 and a second control valve 62, and the first gas tank 61 stores high-concentration helium gas therein and communicates with the gas storage bag 14 via the second control valve 62.
The helium detection mechanism A is a device for detecting the performance of products by using helium. For example, helium detection mechanism a may be used to detect the hermeticity of the battery. Specifically, after the top cover and the case of the battery are welded together, it is necessary to check the sealability of the weld. The helium detection mechanism A injects helium with a certain concentration into the battery and detects whether helium leaks so as to judge the tightness of the battery. After the detection is finished, the helium detection mechanism A pumps out the helium in the battery, and the helium recovery device can be used for recovering the helium in the battery.
The vacuum tank 12 needs to be maintained in a high vacuum state, and the recovery system 1 may further include a vacuum gauge to detect the degree of vacuum of the vacuum tank 12. When the degree of vacuum of the vacuum tank 12 is lower than the set value, the vacuum pump 13 is operated and the vacuum tank 12 is evacuated so that the degree of vacuum of the vacuum tank 12 reaches the set value (for example, the vacuum pump 13 is operated to evacuate the vacuum tank 12 to-90 KPa or less). When one detection cycle of the helium detection mechanism a is completed, the first control valve 11 is turned on, and since the vacuum tank 12 is in high vacuum, the helium in the helium detection mechanism a can be quickly recovered (of course, the helium is mixed with other gases). Helium (and other gases mixed) in the vacuum tank 12 enters the gas storage bag 14 under the suction action of the vacuum pump 13. The sensor 15 can detect the amount of helium in the gas storage bag 14 in real time.
The helium detection mechanism A, the first control valve 11, the vacuum tank 12, the vacuum pump 13 and the gas storage bag 14 can be connected in sequence through pipelines. The gas storage bag 14 may be a flexible gas bag, and the gas storage bag 14 becomes larger as the amount of helium increases. The sensor 15 can sense the volume of helium by sensing the volume change of the gas storage bag 14. The number of the sensors 15 may be three, one of which senses the minimum state of the gas storage bag 14 (i.e., no helium gas is present in the gas storage bag 14), the other of which senses the maximum state of the gas storage bag 14 (i.e., helium gas is filled in the gas storage bag 14), and the last of which senses the set state of the gas storage bag 14 (i.e., the amount of helium gas in the gas storage bag 14 reaches a set value, so that the compression system 2 can be started).
The air storage bag 14, the compression system 2, the filtering system 3 and the storage system 4 can be connected in sequence through pipelines. When the helium amount in the gas storage bag 14 reaches a set value, the sensor 15 obtains a signal and starts the compression system 2, the compression system 2 compresses helium and inputs the helium into the filtering system 3, and the helium filtered by the filtering system 3 is stored in the storage system 4. During compression, the first control valve 11 is opened.
The detection system 5 is connected with the storage system 4 through a pipeline and can detect the helium concentration in the storage system 4. When the helium concentration in the storage system 4 is lower than the set value, the second control valve 62 of the helium replenishment system 6 is switched on, and the high-concentration helium gas (the concentration of which can be 99% and is higher than the helium gas concentration extracted from the helium gas detection mechanism a) in the first gas storage tank 61 enters the gas storage bag 14, then enters the storage system 4 after passing through the compression system 2 and the filtration system 3, so as to increase the helium gas concentration in the storage system 4 and reach the set value. When the helium concentration in the storage system 4 reaches the set value, the output valve 71 is opened and helium is delivered to the helium detection mechanism a to be reused for the next cycle detection.
The helium recovery device can rapidly recover helium, and directly recycle the recovered helium, so that helium loss is effectively reduced, and cost is reduced.
Referring to fig. 1, the first air tank 61 is also communicated with an output valve 71. The output valve 71 is a multi-way directional control valve. When equipment breaks down and cannot recover helium, or recovered helium cannot meet requirements, the output valve 71 connects the first gas storage tank 61 and the output pipeline 72, helium in the first gas storage tank 61 is directly supplied to the helium detection mechanism A, and uninterrupted production is achieved.
Referring to fig. 1, the recovery system 1 further includes a pressure reducing valve 16 connected between the air storage bag 14 and the first control valve 11. In other words, the pressure reducing valve 16 is connected in parallel with the vacuum tank 12 and the vacuum pump 13. When the vacuum tank 12 or the vacuum pump 13 fails, helium in the helium detection mechanism A can enter the gas storage bag 14 through the pressure reducing valve 16.
A filter B may be provided upstream of the vacuum tank 12 to provide a preliminary filtration of the helium gas.
The recovery system 1 may further comprise a first one-way valve 17, and the vacuum pump 13 is in communication with the gas storage bag 14 via the first one-way valve 17. The vacuum pump 13, the first one-way valve 17 and the gas storage bag 14 are connected in sequence through pipelines. The first check valve 17 prevents the gas in the gas bomb 14 from flowing back into the vacuum pump 13 and the vacuum tank 12.
The compression system 2 may include a compressor 21, an accumulator 22, and a third control valve 23, the compressor 21 compressing helium gas and delivering the helium gas to the filtration system 3, the compressor 21 generating liquid during compression that enters the accumulator 22 via the third control valve 23. The compressor 21 extracts and compresses helium gas in the gas storage bag 14, and the compressed gas enters the filtering system 3. During the compression of the helium gas, a liquid (e.g. oil) is generated, which enters the accumulator 22 through the third control valve 23. The collector 22 is provided with a manual valve which can be opened to drain the liquid when the collected liquid reaches a certain amount.
The filter system 3 may comprise a carbon filter 31, an oil mist filter 32 and a particle filter 33. The particulate filter 33 may be a 3 μm particulate filter. The filter system 3 may further include a third check valve 34 disposed on a connection line between the filter system 3 and the storage system 4 to prevent helium gas in the storage system 4 from flowing back into the filter system 3.
The storage system 4 may include a second air tank 41 and a fourth control valve 42 disposed at the second air tank 41, and the second air tank 41 is connected to the output valve 71 and the filter system 3 through the fourth control valve 42. The fourth control valve 42 may be directly disposed on the second air container 41, and the air in the second air container 41 needs to pass through the fourth control valve 42. When the fourth control valve 42 is turned on, the helium gas filtered by the filtering system 3 may enter the second gas storage tank 41, and the helium gas in the second gas storage tank 41 may also enter the output valve 71. However, the intake process and the exhaust process of the second tank 41 are independent of each other and do not proceed simultaneously.
The second air tank 41 may be plural, and a fourth control valve 42 is provided to each second air tank 41.
The detection system 5 may include a helium concentration detector 51 and a fifth control valve 52, and the helium concentration detector 51 communicates with the storage system 4 via the fifth control valve 52. The second gas tank 41, the fourth control valve 42, the fifth control valve 52, and the helium concentration detector 51 are sequentially communicated via a pipeline. When the helium concentration in the second gas storage tank 41 needs to be detected, the fourth control valve 42 and the fifth control valve 52 are switched on, and helium flows into the helium concentration detector 51. After the detection is completed, the fifth control valve 52 is opened.
The sensing system 5 may further include a pressure gauge to sense the internal air pressure of the second air tank 41. When the air pressure and the helium concentration in the second gas storage tank 41 reach set values, the output valve 71 is switched on and delivers the helium in the second gas storage tank 41 to the helium detection mechanism a for the next cycle detection.
The detection system 5 further includes a sixth control valve 53 and a seventh control valve 54, and the vacuum tank 12 communicates with the helium concentration detector 51 via the sixth control valve 53, and the gas bomb 14 communicates with the helium concentration detector 51 via the seventh control valve 54. The vacuum tank 12, the sixth control valve 53, and the helium concentration detector 51 are sequentially communicated through a pipeline, and the gas bomb 14, the seventh control valve 54, and the helium concentration detector 51 are sequentially communicated through a pipeline. The sixth control valve 53 may be a solenoid valve, and the seventh control valve 54 may be a manual valve.
The detection system 5 further comprises a throttle valve 55 arranged between the helium concentration detector 51 and the fifth control valve 52 to regulate the flow into the helium concentration detector 51.
The first air tank 61, the second control valve 62, the second check valve 63 and the air bag 14 are sequentially communicated through a pipeline. When the second control valve 62 is turned on, the high-concentration helium gas in the first gas tank 61 flows to the gas bomb 14, and the second check valve 63 can prevent the helium gas in the gas bomb 14 from flowing back to the first gas tank 61.
The first air tank 61, the eighth control valve 64 and the filter system 3 are sequentially communicated via a pipeline. When the gas storage bag 14 or the compression system 2 fails, the eighth control valve 64 is turned on, and the first gas storage tank 61 can directly supplement the high-concentration helium gas to the second gas storage tank 41 through the filter system 3, so as to increase the concentration of the helium gas in the second gas storage tank 41.
A ninth control valve 65 may be provided to the first reservoir 61 to control the discharge of the first reservoir 61. The first air tank 61, the fourth check valve 66 and the output valve 71 are connected in sequence via a pipe.
The first air reservoir 61 may also be connected directly to the outlet line 72 via a tenth control valve 67. The tenth control valve 67 may be a manual valve. When the output valve 71 has a fault, the tenth control valve 67 can be directly and manually opened, and the helium in the first storage tank 61 can be directly supplied to the helium detection mechanism A through the output pipeline 72, so that uninterrupted production is realized.
The helium recovery apparatus of the present invention further comprises a control system (not shown) to control the respective valves, the vacuum pump 13, the compressor 21, the helium concentration detector 51, and the like. Specifically, the control system includes a touch control screen, and parameters such as the amount of helium in the gas storage bag 14 triggering the sensor 15, the concentration of helium in the storage system 4, and the like can be set according to requirements.
By setting the concentration of the touch control screen, helium with any concentration can be obtained. And the helium with low concentration (for example, 60%) is directly used to enter the helium detection mechanism A for detection, so that the aim of saving can be achieved.
Claims (10)
1. The helium gas recovery device is characterized by comprising a recovery system (1), a compression system (2), a filtering system (3), a storage system (4), a detection system (5), a helium supplementing system (6) and an output system (7);
the recovery system (1) comprises a first control valve (11), a vacuum tank (12), a vacuum pump (13), a gas storage bag (14) and a sensor (15), wherein the first control valve (11) is used for being connected with an external helium detection mechanism (A), the vacuum tank (12) is connected with the first control valve (11), the vacuum pump (13) is connected between the vacuum tank (12) and the gas storage bag (14) and can convey helium in the vacuum tank (12) to the gas storage bag (14), and the sensor (15) is arranged in the gas storage bag (14) and can detect the helium amount in the gas storage bag (14); the recovery system (1) further comprises a vacuum gauge to detect the vacuum degree of the vacuum tank (12); when the vacuum degree of the vacuum tank (12) is lower than a set value, the vacuum pump (13) works and vacuumizes the vacuum tank (12) so as to enable the vacuum degree of the vacuum tank (12) to reach the set value;
the compression system (2) is communicated with the gas storage bag (14) and is controlled by the sensor (15), the filtering system (3) is connected between the compression system (2) and the storage system (4), the compression system (2) compresses helium in the gas storage bag (14) after receiving a signal of the sensor (15), and the compressed helium passes through the filtering system (3) and is stored in the storage system (4);
the output system (7) comprises an output valve (71) and an output pipeline (72) connected to the output valve (71), the output pipeline (72) is used for being connected to the helium detection mechanism (A), and the storage system (4) is connected with the output valve (71);
the detection system (5) is connected with the storage system (4) and is used for detecting the helium concentration in the storage system (4), and when the helium concentration reaches a set value, the output valve (71) is switched on and conveys helium to the helium detection mechanism (A);
the helium supplementing system (6) comprises a first gas storage tank (61) and a second control valve (62), wherein high-concentration helium gas is stored in the first gas storage tank (61) and is communicated with the gas storage bag (14) through the second control valve (62).
2. The helium recovery device of claim 1, wherein the first gas tank (61) is further in communication with an output valve (71).
3. Helium recovery device as claimed in claim 1, characterized in that the recovery system (1) further comprises a pressure reducing valve (16) connected between the gas bomb (14) and the first control valve (11).
4. The helium recovery device of claim 1,
the recovery system (1) further comprises a first one-way valve (17), and the vacuum pump (13) is communicated with the gas storage bag (14) through the first one-way valve (17);
the helium replenishment system (6) further comprises a second one-way valve (63), and the second control valve (62) is in communication with the gas storage bag (14) via the second one-way valve (63).
5. Helium recovery device as claimed in claim 1, characterized in that the compression system (2) comprises a compressor (21), an accumulator (22) and a third control valve (23), the compressor (21) compressing the helium and delivering the helium to the filtration system (3), the liquid produced by the compressor (21) during compression entering the accumulator (22) via the third control valve (23).
6. Helium recovery device as claimed in claim 1, characterized in that the filtering system (3) comprises a carbon filter (31), an oil mist filter (32) and a particle filter (33).
7. Helium recovery device according to claim 1, wherein the storage system (4) comprises a second gas tank (41) and a fourth control valve (42) arranged to the second gas tank (41), and the second gas tank (41) is connected to the outlet valve (71) and the filtration system (3) via the fourth control valve (42).
8. Helium recovery device as in claim 1, characterized in that the detection system (5) comprises a helium concentration detector (51) and a fifth control valve (52), and in that the helium concentration detector (51) communicates with the storage system (4) via the fifth control valve (52).
9. Helium recovery device as claimed in claim 1, characterized in that the detection system (5) comprises a sixth control valve (53) and a seventh control valve (54), and in that the vacuum tank (12) is in communication with the helium concentration detector (51) via the sixth control valve (53), and in that the gas bomb (14) is in communication with the helium concentration detector (51) via the seventh control valve (54).
10. Helium recovery apparatus as claimed in claim 1, wherein the helium replenishment system (6) further comprises an eighth control valve (64), and the first gas reservoir (61) is in communication with the filtration system (3) via the eighth control valve (64).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711385269.6A CN109945070B (en) | 2017-12-20 | 2017-12-20 | Helium recovery device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711385269.6A CN109945070B (en) | 2017-12-20 | 2017-12-20 | Helium recovery device |
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| CN109945070B true CN109945070B (en) | 2020-10-02 |
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| CN111141458B (en) * | 2019-12-25 | 2022-01-21 | 兰州空间技术物理研究所 | Helium recovery device and recovery method for leak detection of high-pressure gas cylinder |
| CN112098008A (en) * | 2020-08-25 | 2020-12-18 | 广东鸿图科技股份有限公司 | Device for detecting air tightness of workpiece |
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