Multifunctional liquid nitrogen heat preservation device

Abstract

The utility model relates to the technical field of liquid nitrogen heat preservation, in particular to a multifunctional liquid nitrogen heat preservation device, which is used for a liquid nitrogen storage tank and comprises an upper heat preservation cover, a lower heat preservation cover and an upper heat preservation cover. The heat preservation lower cover comprises a lower cover main body and a lower cover inner container, the lower cover inner container is arranged in the lower cover main body, the lower cover inner container is movably connected with the lower cover main body, and external threads are formed in the lower cover main body; and a filter member. According to the multifunctional liquid nitrogen heat preservation device, liquid nitrogen is filtered through the filtering part in the liquid nitrogen taking process through the liquid nitrogen storage tank, it is guaranteed that ice blocks or impurities are filtered out, the ice blocks or the impurities can be effectively prevented from entering the Dewar flask, and it is guaranteed that an electron microscope and an energy disperse spectroscopy cannot work normally.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen insulation technology, specifically a multifunctional liquid nitrogen insulation device. Background Technology

[0002] Liquid nitrogen has a high thermal conductivity, which allows it to absorb and transfer heat quickly. Its evaporation rate depends on specific conditions, such as ambient temperature, air flow speed, and the container in which it is stored. Generally speaking, the higher the ambient temperature and the faster the air flow, the faster the heat conduction of the container and the faster the evaporation. The ambient temperature is generally around 20°C. At room temperature, the outside world is the heat source for liquid nitrogen, which is equivalent to being heated in a 360-degree range. Liquid nitrogen will evaporate very quickly. Therefore, liquid nitrogen needs to be stored in a professional liquid nitrogen storage tank.

[0003] However, the cryogenic liquid nitrogen tanks undergo long-distance transportation from the manufacturer to the user. During this process, slight loosening may occur at the connection between the liquid level gauge and the tank body of the liquid transport tank, leading to uncontrollable icing of the liquid nitrogen. This is not noticeable when the tank is not in use, but a large amount of frost will appear after use. The frost or ice inside the liquid nitrogen tank is mainly due to heat exchange between the inner and outer liner of the liquid nitrogen tank, as well as the condensation of water vapor in the air. When the liquid nitrogen from the transport tank is poured into the liquid nitrogen storage tank, ice is also poured into the liquid nitrogen storage tank, causing the stopper to freeze. If liquid nitrogen containing ice, ice shells, or impurities is added to the Dewar flask, it will directly affect the heat conduction, reduce the resolution, increase noise, and cause the electron microscope and energy dispersive spectrometer to malfunction. Utility Model Content

[0004] The purpose of this invention is to provide a multifunctional liquid nitrogen insulation device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A multifunctional liquid nitrogen insulation device for liquid nitrogen storage tanks, comprising:

[0007] The heat-insulating top cover has anti-slip grooves on its surface and internal threads inside;

[0008] The heat-insulating lower cover includes a lower cover body and a lower cover inner liner. The lower cover inner liner is set inside the lower cover body and is movably connected to the lower cover body. The lower cover body is provided with external threads.

[0009] The filter element, located between the upper and lower insulated covers, is used to filter ice or impurities.

[0010] Preferably, the filter component includes a filter cup body, which has a folded structure, with a strainer connected to one end of the filter cup body and a connecting plate connected to the other end.

[0011] Preferably, a handle ring is rotatably connected to the inner wall of the end of the filter cup near the connecting plate.

[0012] Preferably, the connecting plate is provided with two sets of locking blocks, which are distributed circumferentially, and the insulation cover is provided with fixing grooves at the corresponding positions of each locking block.

[0013] Preferably, a slot is provided on one side of the bottom of the fixing groove, and the slots are distributed circumferentially inside the heat-insulating cover.

[0014] Preferably, an external block is provided on the lower cover body, and two sets of pins are provided on the external block.

[0015] Preferably, a connecting rod is provided on the connecting plate, and a through hole is opened at the end of the pin corresponding to the position of the connecting rod. When both ends of the connecting rod extend into the through hole, the filter component is rotatably connected to the lower cover body.

[0016] Preferably, the lower cover body has an internal groove, and the lower cover inner liner is placed inside the internal groove.

[0017] Preferably, the liquid nitrogen storage tank is provided with a tank opening, and multiple sets of limiting grooves are provided on the tank opening.

[0018] Preferably, a sealing gasket is provided inside the lower cover inner liner, and a limit block is provided at the position of each limit groove corresponding to the sealing gasket.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] 1. This utility model uses a lower cover body that fits over a liquid nitrogen storage tank. At this time, the sealing gasket and limiting block inside the lower cover provide a first layer of insulation for the liquid nitrogen storage tank. Then, the upper and lower insulated covers are connected by screws to provide a second layer of insulation for the liquid nitrogen storage tank. The threaded temperature locking device is more airtight and has a better insulation effect than the bayonet device.

[0021] 2. This utility model uses a filter component in the liquid nitrogen storage tank to filter the liquid nitrogen during the liquid nitrogen extraction process, ensuring that ice or impurities are filtered out. This effectively prevents ice or impurities from entering the Dewar flask, thus ensuring that the electron microscope and energy dispersive spectrometer cannot work properly. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a bottom view of the structure of the heat-insulating lower cover of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the lower cover body and filter component of this utility model;

[0026] Figure 4 This is a schematic diagram of the filter component of this utility model in its unfolded state;

[0027] Figure 5 This is a schematic diagram of the filter component of this utility model in its folded state and the structure of the heat-insulating top cover.

[0028] In the picture:

[0029] 1. Insulated top cover; 101. Internal thread; 102. Fixing groove; 103. Clip groove;

[0030] 2. Insulated lower cover; 201. Lower cover body; 202. Lower cover inner liner; 203. External thread; 204. External block; 205. Pin; 206. Sealing gasket; 207. Limiting block; 208. Internal groove;

[0031] 3. Filter components; 301. Handle ring; 302. Connecting plate; 303. Filter cup body; 304. Locking block; 305. Connecting rod; 306. Strainer; 4. Anti-slip groove;

[0032] 5. Liquid nitrogen storage tank; 501. Tank opening; 502. Limiting groove.

[0033] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0034] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and 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.

[0035] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0036] like Figures 1-5As shown, this application provides a multifunctional liquid nitrogen insulation device for a liquid nitrogen storage tank 5, comprising: an insulation upper cover 1 with an anti-slip groove 4 on its surface and an internal thread 101 therein; an insulation lower cover 2, comprising a lower cover body 201 and a lower cover inner liner 202, the lower cover inner liner 202 being disposed inside the lower cover body 201 and being movably connected to the lower cover body 201, and the lower cover body 201 having an external thread 203; and a filter component 3 disposed between the insulation upper cover 1 and the insulation lower cover 2 for filtering ice or impurities.

[0037] The liquid nitrogen storage tank 5 is insulated by the lower cover body 201 fitted onto it. The upper cover 1 and the lower cover body 201 are screwed together by the external thread 203 and the internal thread 101, thus providing a second layer of insulation for the liquid nitrogen storage tank 5. The threaded locking device is more airtight and has a better insulation effect than the bayonet device. During the process of using liquid nitrogen, the liquid nitrogen storage tank 5 filters the liquid nitrogen through the filter component 3 to ensure that ice or impurities are filtered out, which can effectively prevent ice or impurities from entering the Dewar flask and ensure that the electron microscope and energy dispersive spectrometer cannot work properly.

[0038] Specifically, such as Figure 4 As shown, the filter component 3 includes a filter cup body 303, which has a folded structure. One end of the filter cup body 303 is connected to a strainer 306, and the other end is connected to a connecting plate 302.

[0039] The foldable filter cup body 303 facilitates the storage of the filter component 3. When the filter cup body 303 is in the folded state, it is stored in the heat-insulating cover 1. When the filter component 3 is taken out from the heat-insulating cover 1, the filter cup body 303 is unfolded without affecting the use of the filter component 3.

[0040] Specifically, such as Figure 1 As shown, a handle ring 301 is rotatably connected to the inner wall of the filter cup body 303 near the connecting plate 302.

[0041] The carrying ring 301 allows for easy movement of the filter component 3, and the rotating carrying ring 301 can be stored on the side wall of the filter cup body 303 when the filter cup body 303 is folded, without affecting the folding of the filter cup body 303.

[0042] Specifically, such as Figure 5 As shown, two sets of locking blocks 304 are provided on the connecting plate 302. The two sets of locking blocks 304 are distributed circumferentially. A fixing groove 102 is provided at the corresponding position of each locking block 304 on the heat insulation cover 1. A locking groove 103 is provided on one side of the bottom of the fixing groove 102. The locking groove 103 is distributed circumferentially inside the heat insulation cover 1.

[0043] When the filter cup body 303 is in the folded state, align the locking block 304 with the fixing groove 102, and then push the filter component 3 into the heat-insulating cover 1 until the locking block 304 is at the bottom of the fixing groove 102. Then rotate the filter component 3 so that the locking block 304 enters the locking groove 103, thus completing the storage of the filter component 3. This can prevent dust and save space. Conversely, the filter component 3 can be removed from the heat-insulating cover 1.

[0044] Specifically, such as Figure 1 and Figure 3 As shown, an external block 204 is provided on the lower cover body 201, and two sets of pins 205 are provided on the external block 204; a connecting rod 305 is provided on the connecting plate 302, and a through hole is opened at the end of the pin 205 corresponding to the position of the connecting rod 305. When both ends of the connecting rod 305 extend into the through hole, the filter component 3 is rotatably connected to the lower cover body 201.

[0045] By inserting both ends of the connecting rod 305 into the through holes of the pin 205, the filter component 3 can be rotatably mounted on the lower cover body 201.

[0046] Specifically, such as Figure 1 and Figure 3 As shown, the lower cover body 201 has an internal groove 208, and the lower cover inner liner 202 is disposed in the internal groove 208.

[0047] By setting up a separate lower cover body 201 and lower cover inner liner 202, when the liquid nitrogen in the liquid nitrogen storage tank 5 needs to be poured out, the lower cover inner liner 202 can be removed from the lower cover body 201. At this time, the lower cover body 201 is still fitted on the tank opening 501, and the filter component 3 is rotatably connected to the lower cover body 201, so that the liquid nitrogen can directly pass through the filter component 3 when it is poured out, saving time and effort in filtering the liquid nitrogen.

[0048] Specifically, such as Figure 2 and Figure 4 As shown, the liquid nitrogen storage tank 5 is provided with a tank opening 501, and multiple sets of limiting grooves 502 are provided on the tank opening 501; a sealing gasket 206 is provided in the inner liner 202 of the lower cover, and a limiting block 207 is provided at the corresponding position of each limiting groove 502 of the sealing gasket 206.

[0049] The sealing gasket 206 and the limiting block 207 inside the inner liner 202 of the lower cover provide a first layer of insulation for the liquid nitrogen storage tank 5. The limiting groove 502 and the limiting block 207 work together to limit the insulation of the lower cover 2, ensuring its sealing and insulation performance.

[0050] The specific details of this plan are as follows:

[0051] When liquid nitrogen transported over long distances needs to be poured into the liquid nitrogen storage tank 5, the lower cover body 201 is removed from the liquid nitrogen storage tank 5, and then the screwed lower cover body 201 and the insulated upper cover 1 are separated. At this time, the filter component 3 is stored in the insulated upper cover 1. Then, the filter component 3 is rotated so that the locking block 304 moves from the locking groove 103 into the fixing groove 102 until the locking block 304 is aligned with the fixing groove 102. At this time, the filter component 3 can be removed from the insulated upper cover 1. Then, the folded filter cup body 303 is unfolded and the unfolded filter component 3 is placed at the tank opening 501. At this time, liquid nitrogen is poured into the liquid nitrogen storage tank 5 through the filter component 3, which can filter out ice or impurities in the transport tank.

[0052] When it is necessary to pour the liquid nitrogen from the liquid nitrogen storage tank 5 into the testing instrument, first separate the screw-on lower cover body 201 and the heat-insulating upper cover 1. At this time, the filter component 3 is stored in the heat-insulating upper cover 1. Then rotate the filter component 3 so that the locking block 304 moves from the locking groove 103 into the fixing groove 102 until the locking block 304 is aligned with the fixing groove 102. At this time, the filter component 3 can be removed from the heat-insulating upper cover 1. Then unfold the folded filter cup body 303. At this time, insert the two ends of the connecting rod 305 into the pin 205. Inside the through hole, the filter element 3 is rotated and set on the lower cover body 201. The lower cover inner liner 202 is taken out from the lower cover body 201. At this time, the lower cover body 201 is still fitted on the can opening 501. The position of the filter element 3 is adjusted, and then the liquid nitrogen in the liquid nitrogen storage tank 5 is poured into the Dewar flask. When the liquid nitrogen is poured out of the liquid nitrogen storage tank 5, it needs to pass through the filter element 3, which can filter ice or impurities again, effectively preventing ice or impurities from entering the Dewar flask and ensuring that the electron microscope and energy dispersive spectrometer cannot work properly.

[0053] After use, place the inner liner 202 back into the main body 201, then remove the connecting rod 305 from the pin 205. Fold the filter cup body 303, aligning the locking block 304 with the fixing groove 102. Push the filter component 3 into the insulated top cover 1 until the locking block 304 is at the bottom of the fixing groove 102. Then rotate the filter component 3 to allow the locking block 304 to enter the locking groove 103, completing the storage of the filter component 3. This method is both dustproof and space-saving. Finally, the insulation is secured by the engagement of the internal thread 101 and the external thread 203. The upper cover 1 is screwed onto the lower cover body 201, and the lower cover body 201 is fitted onto the liquid nitrogen storage tank 5. At this time, the sealing gasket 206 and the limiting block 207 in the inner liner 202 of the lower cover provide a first layer of insulation for the liquid nitrogen storage tank 5. Then, the insulated upper cover 1 and the insulated lower cover 2 are connected by screws to provide a second layer of insulation for the liquid nitrogen storage tank 5. The threaded temperature locking device is more airtight and has a better insulation effect than the bayonet device. In addition, the filter component 3 can be well stored in the insulated upper cover 1 without affecting its use, ensuring that the liquid nitrogen storage tank 5 filters ice or impurities during the liquid nitrogen extraction process.

[0054] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A multifunctional liquid nitrogen insulation device for use in liquid nitrogen storage tanks (5), characterized in that, include: The heat-insulating top cover (1) has anti-slip grooves (4) on its surface and internal threads (101) inside it; The heat-insulating lower cover (2) includes a lower cover body (201) and a lower cover inner liner (202). The lower cover inner liner (202) is disposed inside the lower cover body (201). The lower cover inner liner (202) is movably connected to the lower cover body (201), and the lower cover body (201) is provided with an external thread (203). The filter element (3) is disposed between the upper heat-insulating cover (1) and the lower heat-insulating cover (2) for filtering ice or impurities.

2. The multifunctional liquid nitrogen insulation device according to claim 1, characterized in that, The filter component (3) includes a filter cup body (303), which has a folded structure. One end of the filter cup body (303) is connected to a strainer (306), and the other end is connected to a connecting plate (302).

3. The multifunctional liquid nitrogen insulation device according to claim 2, characterized in that, A handle (301) is rotatably connected to the inner wall of the filter cup body (303) near the connecting plate (302).

4. The multifunctional liquid nitrogen insulation device according to claim 2, characterized in that, The connecting plate (302) is provided with two sets of locking blocks (304), which are distributed circumferentially. The heat-insulating cover (1) is provided with fixing grooves (102) at the corresponding positions of each locking block (304).

5. A multifunctional liquid nitrogen insulation device according to claim 4, characterized in that, The bottom side of the fixing groove (102) is provided with a slot (103), and the slot (103) is distributed circumferentially inside the heat-insulating cover (1).

6. A multifunctional liquid nitrogen insulation device according to claim 2, characterized in that, An external block (204) is provided on the lower cover body (201), and two sets of pins (205) are provided on the external block (204).

7. A multifunctional liquid nitrogen insulation device according to claim 6, characterized in that, A connecting rod (305) is provided on the connecting plate (302). A through hole is opened at the end of the pin (205) corresponding to the position of the connecting rod (305). When both ends of the connecting rod (305) extend into the through hole, the filter component (3) is rotatably connected to the lower cover body (201).

8. A multifunctional liquid nitrogen insulation device according to claim 1, characterized in that, The lower cover body (201) has an internal groove (208) and the lower cover inner liner (202) is disposed in the internal groove (208).

9. A multifunctional liquid nitrogen insulation device according to claim 1, characterized in that, The liquid nitrogen storage tank (5) is provided with a tank opening (501), and multiple sets of limiting grooves (502) are provided on the tank opening (501).

10. A multifunctional liquid nitrogen insulation device according to claim 9, characterized in that, A sealing gasket (206) is provided inside the lower cover inner liner (202), and a limiting block (207) is provided at the corresponding position of each limiting groove (502) of the sealing gasket (206).

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