Gas recovery device

Abstract

The utility model relates to a gas recovery device. The gas recovery device comprises a connector, a first-stage partial pressure recovery mechanism, a second-stage partial pressure recovery mechanism and a vacuum compression mechanism. And the primary partial pressure recovery mechanism is communicated with the second end of the joint and is used for recovering the target gas stored in the detected piece. And the second-stage partial pressure recovery mechanism is communicated with the third end of the joint and is used for secondarily recovering the target gas stored in the detected part. The vacuum compression mechanism is connected with the fourth end of the connector and used for recycling residual target gas of the detected part, and the first-stage partial pressure recycling mechanism and the second-stage partial pressure recycling mechanism are both connected with the vacuum compression mechanism. According to the gas recovery device, after recovery of the first-stage partial pressure recovery mechanism and the second-stage partial pressure recovery mechanism is finished, most of the target gas is recovered, part of the target gas remains, and finally, the vacuum compression mechanism is opened to recover the residual target gas, so that complete recovery of the target gas of the detected part is realized, and the recovery efficiency is effectively improved.

Description

Technical Field

[0001] This application relates to the field of gas recovery technology, and in particular to a gas recovery device. Background Technology

[0002] Helium is colorless, odorless, and tasteless, and is an inert gas at room temperature. Therefore, helium is often used to test the welding quality and sealing performance of products. Especially in the battery industry, positive-pressure helium is typically injected into the component under test, and the battery's sealing performance is determined by detecting the concentration of helium molecules. However, helium is expensive to use, so to conserve resources and achieve helium reuse, it is necessary to recover the helium used in the tested component.

[0003] In related technologies, the high-pressure recovery method is generally adopted, which utilizes the pressure difference between the high-pressure gas in the test piece and the low-pressure environment in the recovery tank to allow the helium gas in the test piece to automatically flow into the recovery tank.

[0004] However, when using the above method to recover helium, some helium remains in the tested part after the pressure difference between the recovery tank and the tested part reaches equilibrium. Therefore, the helium recovery effect in related technologies is not good, and the recovery efficiency is low. Utility Model Content

[0005] Therefore, it is necessary to provide a gas recovery device to address the problems of poor helium recovery performance and low recovery efficiency in related technologies.

[0006] A gas recovery device, the gas recovery device comprising:

[0007] The connector includes a first end, a second end, a third end, and a fourth end, wherein the first end is used to communicate with the inspected part;

[0008] A primary pressure recovery mechanism, which is connected to the second end and is used to recover the target gas stored in the tested item;

[0009] A two-stage pressure recovery mechanism is connected to the third end and is used for secondary recovery of the target gas stored in the tested item;

[0010] A vacuum compression mechanism is connected to the fourth end and is used to recover the residual target gas of the tested item. The first-stage partial pressure recovery mechanism and the second-stage partial pressure recovery mechanism are both connected to the vacuum compression mechanism. The vacuum compression mechanism can compress the target gas recovered by the first-stage partial pressure recovery mechanism and the second-stage partial pressure recovery mechanism and output it for reuse.

[0011] In one embodiment, the vacuum compression mechanism includes a vacuum pump, a booster, and a high-pressure tank connected in sequence. The first-stage pressure recovery mechanism, the second-stage pressure recovery mechanism, and the fourth end are all connected to the vacuum pump. The vacuum pump is used to extract the target gas and deliver it to the booster. The booster is used to pressurize the target gas and input it into the high-pressure tank. The high-pressure tank is used to store the compressed target gas and output it for reuse.

[0012] In one embodiment, the gas recovery device further includes a pressure regulating mechanism connected to the booster and used to replenish the pressure inside the high-pressure tank.

[0013] In one embodiment, the primary pressure recovery mechanism, the secondary pressure recovery mechanism, the vacuum pump, and the booster are interconnected and form a closed loop. The gas recovery device includes a clean gas input mechanism, which is connected to the closed loop and is used to input clean gas into the closed loop. The closed loop is also provided with an exhaust branch, which is used to discharge the gas in the closed loop.

[0014] In one embodiment, the exhaust branch is connected to the vacuum pump.

[0015] In one embodiment, the pressure regulating mechanism is integrally formed with the clean air input mechanism.

[0016] In one embodiment, the high-pressure tank is connected to a gas output pipeline for outputting the target gas stored in the high-pressure tank. The gas output pipeline is also equipped with a regulating valve for regulating the gas output pressure of the gas output pipeline.

[0017] In one embodiment, the gas recovery device further includes a pressure detector disposed in the primary pressure recovery mechanism, the pressure detector being used to automatically open the secondary pressure recovery mechanism when it detects that the pressure of the primary pressure recovery mechanism is balanced with that of the tested object.

[0018] In one embodiment, the primary pressure recovery mechanism includes a primary tank and a first valve, the primary tank being connected to a second end, and the first valve being disposed between the primary tank and the second end.

[0019] In one embodiment, the two-stage pressure recovery mechanism includes a two-stage tank and a second valve, the two-stage tank being connected to the third end, and the second valve being disposed between the two-stage tank and the third end.

[0020] In operation, the aforementioned gas recovery device first recovers a portion of the target gas from the tested component through a primary pressure recovery mechanism. When the pressure of the primary pressure recovery mechanism and the tested component reaches equilibrium, the primary pressure recovery mechanism is closed, and the secondary pressure recovery mechanism is opened to recover the remaining target gas. After the secondary pressure recovery mechanism completes its recovery, most of the target gas within the tested component has been recovered, with some remaining. Finally, the secondary pressure recovery mechanism is closed, and the vacuum compression mechanism is opened to recover the residual target gas. This achieves complete recovery of the target gas from the tested component, effectively improving recovery efficiency. Furthermore, in addition to recovering the residual target gas, the vacuum compression mechanism is connected to both the primary and secondary pressure recovery mechanisms to enable the compressed output of the target gas for reuse, thus enhancing the functionality of the gas recovery device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structural connection of a gas recovery device in one embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the gas recovery device in one embodiment of this application.

[0023] Figure 3 for Figure 2 The diagram shows a partial structural schematic of the gas recovery device.

[0024] Figure 4 for Figure 2 The diagram shows the structure of the gas recovery device from another perspective.

[0025] Explanation of icon numbers

[0026] 10. Gas recovery device; 20. Test piece; 100. Connector; a1. First end; a2. Second end; a3. Third end; a4. Fourth end; 200. Primary pressure recovery mechanism; 210. Primary tank; 220. First valve; 300. Secondary pressure recovery mechanism; 310. Secondary tank; 320. Second valve; 400. Vacuum compression mechanism; 410. Vacuum pump; 420. Intensifier; 430. High-pressure tank; 431. Gas output pipeline; 4311. Regulating valve; 500. Pressure regulating mechanism; 600. Clean gas input mechanism; 700. Exhaust branch; 800. Branch pipeline. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] See Figures 1-4 ,in Figure 1 A schematic diagram of the structural connection of a gas recovery device 10 according to an embodiment of this application is shown. The gas recovery device 10 provided in one embodiment of this application includes a connector 100, a primary pressure recovery mechanism 200, a secondary pressure recovery mechanism 300, and a vacuum compression mechanism 400. The connector 100 includes a first end a1, a second end a2, a third end a3, and a fourth end a4. The first end a1 is used to communicate with the test piece 20. The primary pressure recovery mechanism 200 is connected to the second end a2 and is used to recover the target gas stored in the test piece 20. The secondary pressure recovery mechanism 300 is connected to the third end a3 and is used for secondary recovery of the target gas stored in the test piece 20. The vacuum compression mechanism 400 is connected to the fourth end a4 and is used to recover the residual target gas of the tested item 20. The first-stage partial pressure recovery mechanism 200 and the second-stage partial pressure recovery mechanism 300 are both connected to the vacuum compression mechanism 400. The vacuum compression mechanism 400 can compress the target gas recovered by the first-stage partial pressure recovery mechanism 200 and the second-stage partial pressure recovery mechanism 300 and output it for reuse.

[0034] In operation, the gas recovery device 10 first recovers a portion of the target gas from the test piece 20 via the primary pressure recovery mechanism 200. When the pressure of the primary pressure recovery mechanism 200 and the test piece 20 is balanced, the primary pressure recovery mechanism 200 is closed, and the secondary pressure recovery mechanism 300 is opened to recover the remaining target gas from the test piece 20. After the secondary pressure recovery mechanism 300 finishes its recovery, most of the target gas in the test piece 20 has been recovered, with some remaining. Finally, the secondary pressure recovery mechanism 300 is closed, and the vacuum compression mechanism 400 is opened to recover the remaining target gas. This achieves complete recovery of the target gas from the test piece 20, effectively improving the recovery efficiency. Furthermore, in addition to recovering the remaining target gas, the vacuum compression mechanism 400 is connected to both the primary and secondary pressure recovery mechanisms 200 and 300 to enable the compressed output of the target gas for reuse, thus enhancing the functionality of the gas recovery device 10.

[0035] Optionally, the primary pressure recovery mechanism 200 may include, but is not limited to, a primary tank 210 and a first valve 220. The primary tank 210 is connected to the second end a2, and the first valve 220 is located between the primary tank 210 and the second end a2. This allows the first valve 220 to be closed after the primary pressure recovery mechanism 200 has finished recovering, so that the secondary pressure recovery mechanism 300 can be opened for secondary recovery. The structure is simple and reliable.

[0036] Optionally, the secondary pressure recovery mechanism 300 may include, but is not limited to, a secondary tank 310 and a second valve 320. The secondary tank 310 is connected to the third end a3, and the second valve 320 is located between the secondary tank 310 and the third end a3. This allows the second valve 320 to be closed after the secondary pressure recovery mechanism 300 has finished recovering the gas, so that the vacuum compression mechanism 400 can recover the residual target gas. The structure is simple and reliable.

[0037] Preferably, the gas recovery device 10 may include, but is not limited to, a pressure detector (not shown). The pressure detector is installed in the primary pressure recovery mechanism 200. The pressure detector is used to automatically open the secondary pressure recovery mechanism 300 when it detects that the pressure of the primary pressure recovery mechanism 200 and the tested object 20 are balanced. This realizes automatic secondary recovery of the secondary pressure recovery mechanism 300, which helps to improve the working efficiency of the gas recovery device 10.

[0038] Optionally, the vacuum compression mechanism 400 may include, but is not limited to, a vacuum pump 410, a booster 420, and a high-pressure tank 430 connected in sequence. The primary partial pressure recovery mechanism 200, the secondary partial pressure recovery mechanism 300, and the fourth end a4 are all connected to the vacuum pump 410. The vacuum pump 410 is used to extract the target gas and deliver it to the booster 420. The booster 420 is used to pressurize the target gas and input it into the high-pressure tank 430. The high-pressure tank 430 is used to store the compressed target gas and output it for reuse. Specifically, the vacuum pump 410 is used, on the one hand, to create a vacuum to recover the residual target gas in the test piece 20, and on the other hand, to deliver the target gas recovered by the primary partial pressure recovery mechanism 200 and the secondary partial pressure recovery mechanism 300 to the booster 420 for pressurization and reuse. Therefore, the gas recovery device 10 of this application is not limited to the gas recovery function. While recovering the gas, it can also output the recovered gas for reuse, thus improving the functionality and applicability of the gas recovery device 10.

[0039] Optionally, the high-pressure tank 430 may be connected to a gas output pipeline 431, which is used to output the target gas stored in the high-pressure tank 430. The gas output pipeline 431 is also equipped with a regulating valve 4311, which is used to regulate the gas output pressure of the gas output pipeline 431, thereby improving the adaptability of the target gas output of the gas recovery device 10 to different test pieces 20 when it is reused.

[0040] Optionally, the gas recovery device 10 may, but is not limited to, include a pressure regulating mechanism 500. The pressure regulating mechanism 500 is connected to the booster 420 and is used to supplement the pressure inside the high-pressure tank 430 to meet the inflation pressure requirements of the test piece 20. Specifically, when the pressure inside the high-pressure tank 430 does not meet the inflation requirements of the test piece 20, the booster pressure of the booster 420 can be adjusted by the pressure regulating mechanism 500 to supplement the pressure inside the high-pressure tank 430. Preferably, the pressure regulating mechanism 500 may, but is not limited to, be implemented as a gas replenishment mechanism, which is used to introduce a gas of the same type as the target gas into the booster 420 to supplement the pressure inside the high-pressure tank 430.

[0041] Optionally, in some embodiments, the primary pressure recovery mechanism 200, the secondary pressure recovery mechanism 300, the vacuum pump 410, and the booster 420 are interconnected and form a closed loop. The gas recovery device 10 may, but is not limited to, also include a clean gas input mechanism 600. The clean gas input mechanism 600 is connected to the closed loop and is used to input clean gas into the closed loop. The closed loop is also provided with an exhaust branch 700, which is used to discharge gas from the closed loop. The setting of the clean gas input mechanism 600 helps to clean the structure of the gas recovery device 10 and avoid contamination.

[0042] In addition to performing structural cleaning on the gas recovery device 10, the clean gas input mechanism 600 can also work with the pressure regulating mechanism 500, vacuum pump 410 and booster 420 to evacuate the gas recovery device 10 before each target gas recovery operation, thus preventing the presence of air from reducing the purity of the recovered target gas.

[0043] Specifically, in combination Figure 1 As shown, before each target gas recovery operation, the clean gas input mechanism 600, pressure regulating mechanism 500, and booster 420 can be opened, and the vacuum pump 410 can be closed. This allows the clean gas to flow to the booster 420 for pressurization and then into the high-pressure tank 430. After the gas recovery device 10 forms high pressure, the vacuum pump 410 is opened to evacuate the gas. Optionally, the evacuation can be performed for about 10 seconds. Then, the clean gas input mechanism 600 is closed. The gas in the gas recovery device 10 will be discharged into the atmosphere through the exhaust branch 700 under the vacuum negative pressure, including the air stored in the gas recovery device 10. Therefore, after the gas recovery device 10 is evacuated, the exhaust branch 700 can be closed in time, so that the pipeline and tank of the gas recovery device 10 are in a vacuum state. Target gas recovery is performed under vacuum state, which can avoid the presence of air and reduce the purity of the recovered target gas.

[0044] More specifically, the gas recovery device 10 is equipped with various valves on each pipeline. When the clean gas input mechanism 600 is working, the opening and closing of each valve adjusts the primary pressure recovery mechanism 200, the secondary pressure recovery mechanism 300, the vacuum pump 410, and the booster 420 to form a circulating loop, thus enabling the circulation of clean gas to improve the cleaning effect. Finally, the gas in the circulating loop is discharged by opening the valve of the exhaust branch 700. More specifically, the clean gas can be, but is not limited to, nitrogen.

[0045] Preferably, the pressure regulating mechanism 500 and the clean gas input mechanism 600 can be, but are not limited to, integrally formed, so as to integrate the pressurization function and the cleaning function of the gas recovery device 10, thereby improving the functionality and structural integration of the gas recovery device 10.

[0046] Specifically, the conduction loop includes a branch pipe 800, one end of which is connected between the booster 420 and the high-pressure tank 430, and the other end is connected between the primary tank 210 and the second end a2. Thus, the clean gas input mechanism 600 can, but is not limited to, be implemented to select different gases for the booster 420. When a boosting function is required, the branch pipe 800 is disconnected, and the clean gas input mechanism 600 introduces a gas of the same type as the target gas to replenish the pressure in the high-pressure tank 430. When a cleaning function is required, the branch pipe 800 is connected to the booster 420, and the clean gas input mechanism 600 introduces clean gas into the branch pipe 800, causing the clean gas to flow within the conduction loop where the primary partial pressure recovery mechanism 200, the secondary partial pressure recovery mechanism 300, the vacuum pump 410, and the booster 420 are interconnected, thereby achieving cleaning.

[0047] Preferably, the exhaust branch 700 is connected to the vacuum pump 410, so that when the cleaning gas circulation is completed and exhaust is required, the cleaning gas can be discharged from the exhaust branch 700 in a timely manner under the action of the vacuum pump 410, which helps to improve the cleaning effect.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A gas recovery device, characterized in that, The gas recovery device includes: The connector includes a first end, a second end, a third end, and a fourth end, wherein the first end is used to communicate with the inspected part; A primary pressure recovery mechanism is connected to the second end and is used to recover the target gas stored in the tested item. A two-stage pressure recovery mechanism is connected to the third end and is used for secondary recovery of the target gas stored in the tested item; A vacuum compression mechanism is connected to the fourth end and is used to recover the residual target gas of the tested item. The first-stage partial pressure recovery mechanism and the second-stage partial pressure recovery mechanism are both connected to the vacuum compression mechanism. The vacuum compression mechanism can compress the target gas recovered by the first-stage partial pressure recovery mechanism and the second-stage partial pressure recovery mechanism and output it for reuse.

2. The gas recovery device according to claim 1, characterized in that, The vacuum compression mechanism includes a vacuum pump, a booster, and a high-pressure tank connected in sequence. The first-stage partial pressure recovery mechanism, the second-stage partial pressure recovery mechanism, and the fourth end are all connected to the vacuum pump. The vacuum pump is used to extract the target gas and deliver it to the booster. The booster is used to pressurize the target gas and input it into the high-pressure tank. The high-pressure tank is used to store the compressed target gas and output it for reuse.

3. The gas recovery device according to claim 2, characterized in that, The gas recovery device also includes a pressure regulating mechanism, which is connected to the booster and is used to replenish the pressure inside the high-pressure tank.

4. The gas recovery device according to claim 3, characterized in that, The primary pressure recovery mechanism, the secondary pressure recovery mechanism, the vacuum pump, and the booster are interconnected and form a closed loop. The gas recovery device includes a clean gas input mechanism, which is connected to the closed loop and is used to input clean gas into the closed loop. The closed loop is also provided with an exhaust branch, which is used to discharge the gas in the closed loop.

5. The gas recovery device according to claim 4, characterized in that, The exhaust branch is connected to the vacuum pump.

6. The gas recovery device according to claim 4, characterized in that, The pressure regulating mechanism and the clean gas input mechanism are integrally formed.

7. The gas recovery device according to claim 2, characterized in that, The high-pressure tank is connected to a gas output pipeline, which is used to output the target gas stored in the high-pressure tank. The gas output pipeline is also equipped with a regulating valve, which is used to regulate the gas output pressure of the gas output pipeline.

8. The gas recovery device according to claim 1, characterized in that, The gas recovery device also includes a pressure detector, which is installed in the first-stage partial pressure recovery mechanism. The pressure detector is used to automatically open the second-stage partial pressure recovery mechanism when it detects that the pressure of the first-stage partial pressure recovery mechanism is balanced with that of the tested object.

9. The gas recovery device according to any one of claims 1-8, characterized in that, The primary pressure recovery mechanism includes a primary tank and a first valve. The primary tank is connected to the second end, and the first valve is disposed between the primary tank and the second end.

10. The gas recovery device according to claim 9, characterized in that, The two-stage pressure recovery mechanism includes a two-stage tank and a second valve. The two-stage tank is connected to the third end, and the second valve is disposed between the two-stage tank and the third end.

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