Portable liquid nitrogen device

Abstract

The utility model discloses a portable liquid nitrogen device which comprises a heat preservation barrel, a storage basket and a lifting device. A heat preservation layer is arranged on the inner wall of the heat preservation barrel, and heat transfer between liquid nitrogen in the device and the outside can be reduced; the storage basket is movably arranged in the heat preservation barrel, and a plurality of through holes are formed in the storage basket, so that liquid nitrogen can circulate between the inside and the outside of the storage basket through the through holes, and the temperature in the storage basket and the temperature of the liquid nitrogen between the heat preservation barrel are kept balanced in the storage process; the lifting device is connected with the heat preservation barrel and the storage basket, and the storage basket can ascend and descend in the heat preservation barrel through the lifting device. The lifting device drives the storage basket to ascend relative to the heat preservation barrel, then the biological specimens are extracted or stored, and it can be avoided that mist of liquid nitrogen blocks the sight line, and the operation difficulty is increased; and the hands of the worker can be prevented from being frostbitten by liquid nitrogen when being placed at the bottom of the heat preservation barrel.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid nitrogen heat preservation devices, in particular to a portable liquid nitrogen device. Background Art

[0002] Most of the existing portable liquid nitrogen devices are in liquid phase, but some biological specimens have been temporarily stored in gas phase deep cryogenic liquid nitrogen tanks before transportation. Therefore, the transportation process is also placed in a gas phase deep cryogenic environment as much as possible to ensure that the biological activity of the specimen is more stable; most portable liquid nitrogen devices are small containers and have a lot of heat transfer with the outside world. Therefore, the liquid nitrogen in the device boils when heated and fogs up severely, making it difficult to remove biological specimens placed in the portable liquid nitrogen device; in addition, when people directly reach into the portable liquid nitrogen device to extract or store, they are easily frostbitten by the liquid nitrogen. Utility Model Content

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a portable liquid nitrogen device, which is convenient for extracting or storing biological specimens in the portable liquid nitrogen device.

[0004] The first technical solution of the utility model is as follows:

[0005] A portable liquid nitrogen device comprises a heat preservation barrel, a storage basket, and a lifting device; the inner wall of the heat preservation barrel is provided with a heat preservation layer, the storage basket is movably arranged in the heat preservation barrel, the storage basket is provided with a plurality of through holes, and the lifting device connects the heat preservation barrel and the storage basket.

[0006] Furthermore, the lifting device includes a guide rail and a sliding member; the guide rail is vertically arranged on the outside of the storage basket, and the sliding member is arranged on the insulation barrel, and the guide rail and the sliding member are slidably matched.

[0007] Furthermore, the guide rail is provided with a rack, and the sliding part includes a connecting rod, a gear, and a knob; the connecting rod is passed through the side wall of the heat-insulating barrel, the gear is fixed on the connecting rod, the gear and the rack are meshed, and the knob is fixed on one end of the connecting rod located on the outside of the heat-insulating barrel.

[0008] Furthermore, the guide rail is provided with a limit groove, and the rack and the limit groove are spaced apart along the axial direction of the sliding member; the sliding member also includes an expansion clamp, and one end of the connecting rod is provided with a head, the expansion clamp can be horizontally slidably mounted on the connecting rod, and the head is located in the expansion clamp, and one end of the expansion clamp can be slidably arranged up and down in the limit groove.

[0009] Furthermore, the expansion clamp includes a collar, a plurality of extension strips and a plurality of support blocks; the diameter of the inner ring of the collar is larger than the outer diameter of the connecting rod; the plurality of extension strips are arranged around and at intervals, one end of the extension strip is fixedly arranged on an end face of the collar, each support block is correspondingly arranged at the other end of an extension strip, the support block is slidably arranged in the limit groove, the side surface of the support block close to the axis is an inclined surface, and the inclined surface deviates radially in the direction of the collar.

[0010] Furthermore, the guide rail also includes a limit block, and the limit block is arranged at the top end of the guide rail.

[0011] Furthermore, it also includes a handle, which is rotatably arranged on the outside of the heat preservation barrel.

[0012] Furthermore, it also includes a pair of handles, and the two handles are arranged on both sides of the heat preservation barrel.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] By driving the storage basket to rise relative to the insulation barrel by the lifting device, biological specimens are extracted or stored, which can prevent the liquid nitrogen mist from blocking the view and increasing the difficulty of operation; it can also prevent the staff from being frostbitten by the liquid nitrogen when their hands are placed on the bottom of the insulation barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a three-dimensional diagram of the portable liquid nitrogen device in the utility model;

[0017] Figure 2 It is a three-dimensional diagram of the portable liquid nitrogen device of the utility model (when the storage basket is raised);

[0018] Figure 3 It is a schematic diagram of the guide rail of the utility model;

[0019] Figure 4 It is a schematic diagram of the sliding member of the utility model;

[0020] Figure 5 It is a schematic diagram of the expansion clamp of the utility model;

[0021] Explanation of the accompanying numbers: 1-insulation barrel; 11-insulation layer; 2-storage basket; 21-through hole; 3-lifting device; 31-guide rail; 311-rack; 312-limiting groove; 313-limiting block; 32-sliding member; 321-connecting rod; 3211-top; 322-gear; 323-expansion clamp; 3231-ring; 3232-extension strip; 3233-support block; 324-knob; 4-handle; 5-handle. DETAILED DESCRIPTION

[0022] In order to facilitate a better understanding of the purpose, structure, features and efficacy of the utility model, the utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the figures are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0024] like Figure 1-2 As shown, the present embodiment provides a portable liquid nitrogen device, comprising a heat preservation barrel 1, a storage basket 2, and a lifting device 3; the inner wall of the heat preservation barrel 1 is provided with a heat preservation layer 11, which can reduce the heat transfer between the liquid nitrogen in the device and the outside; the storage basket 2 is movably arranged in the heat preservation barrel 1, and the storage basket 2 is provided with a plurality of through holes 21, so that the liquid nitrogen can flow between the inside and outside of the storage basket 2 through the through holes 21, and the temperature in the storage basket 2 and the temperature of the liquid nitrogen between the heat preservation barrel 1 are kept balanced during storage; the lifting device 3 connects the heat preservation barrel 1 and the storage basket 2, and the lifting device 3 can realize the lifting of the storage basket 2 in the heat preservation barrel 1.

[0025] like Figure 2As shown, the storage basket 2 is driven to rise relative to the insulation barrel 1 by the lifting device 3, and then the biological specimen is extracted or stored, which can avoid the liquid nitrogen mist blocking the line of sight and increasing the difficulty of operation; it can also avoid the staff's hands being frostbitten by liquid nitrogen when placed at the bottom of the insulation barrel 1.

[0026] like Figure 2 As shown, as a preferred solution, the lifting device 3 includes a guide rail 31 and a sliding member 32; the guide rail 31 is vertically arranged on the outside of the storage basket 2, the sliding member 32 is arranged on the heat preservation barrel 1, and the guide rail 31 and the sliding member 32 are slidably matched; through the cooperation of the guide rail 31 and the sliding member 32, the lifting and lowering guidance of the storage basket 2 relative to the heat preservation barrel 1 can be realized, and the storage basket 2 can be locked to keep it at the height required during operation.

[0027] like Figure 3 As shown, further, the guide rail 31 is provided with a rack 311 and a limiting groove 312, and the rack 311 and the limiting groove 312 are arranged at intervals along the axial direction of the sliding member 32; Figure 4 As shown, the sliding member 32 includes a connecting rod 321, a gear 322, an expansion clamp 323, and a knob 324;

[0028] The connecting rod 321 is passed through the side wall of the heat preservation barrel 1; the gear 322 is fixedly arranged on the connecting rod 321, and the gear 322 is meshed with the rack 311 to achieve lifting and lowering guidance between the storage basket 2 and the heat preservation barrel 1;

[0029] The connecting rod 321 is provided with a top head 3211 at one end, and the expansion snap ring 323 can be horizontally slidably sleeved on the connecting rod 321, and the top head 3211 is located in the expansion snap ring 323, and one end of the expansion snap ring 323 can be slidably arranged in the limiting groove 312 up and down. By horizontally pushing the connecting rod 321, the top head 3211 abuts against the inner wall of one end of the expansion snap ring 323 located in the limiting groove 312, and supports the radial expansion of the expansion snap ring 323, and the outer side of the expansion snap ring 323 abuts against the limiting groove 312, so that sufficient static friction is generated between the expansion snap ring 323 and the limiting groove 312 to lock the storage basket 2;

[0030] The knob 324 is fixedly arranged at one end of the connecting rod 321 located outside the heat preservation barrel 1. The storage basket 2 is driven to rise and fall by twisting the knob 324, and the storage basket 2 is locked by pulling the knob 324.

[0031] like Figure 5As shown, specifically, the expansion clamp ring 323 includes a collar 3231, a plurality of extension strips 3232 and a plurality of support blocks 3233; the diameter of the inner ring of the collar 3231 is larger than the outer diameter of the connecting rod 321; the plurality of extension strips 3232 are arranged around and at intervals, one end of the extension strip 3232 is fixedly arranged on an end surface of the collar 3231, and each support block 3233 is correspondingly arranged at the other end of one of the extension strips 3232, and the support block 3233 is slidably arranged in the limiting groove 312, and a side surface of the support block 3233 close to the axis is an inclined surface, and the inclined surface deviates radially from the direction of the collar 3231, so that the inclined surface and the head 3211 form an inclined wedge structure;

[0032] Specifically, when the top head 3211 moves toward the side of the support block 3233, the top head 3211 supports the support block 3233 to diffuse radially, so that the support block 3233 abuts against the limiting groove 312 to generate sufficient static friction to lock the storage basket 2; when the top head 3211 moves toward the side of the ring 3231, the support block 3233 contracts radially, so that the support block 3233 releases the limiting groove 312, and the static friction is eliminated to release the lock.

[0033] like Figure 3 As shown, preferably, the guide rail 31 further includes a limit block 313, and the limit block 313 is arranged at the top end of the guide rail 31, and the limit block 313 is used to limit the sliding member 32 to prevent the storage basket 2 from descending excessively.

[0034] like Figure 1 , 2 As shown, as a preferred solution, the portable liquid nitrogen device further includes a handle 4, which is rotatably arranged on the outside of the insulation barrel 1 and is used to pull up or lay flat the insulation barrel 1.

[0035] like Figure 1 , 2 As shown, as a preferred solution, the liquid nitrogen portable device also includes a pair of handles 5, two of which are arranged on both sides of the heat preservation bucket 1. The two handles 5 can be used to lift the heat preservation bucket 1 by hand, and can also support the handle 4 in a flat position, so that the handle 4 is placed at this position and will not continue to slide down. Both sets of carrying designs can complete the transfer of the liquid nitrogen portable device, which is more flexible to use.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A portable liquid nitrogen device, characterized in that: The invention comprises a heat preservation barrel (1), a storage basket (2), and a lifting device (3); the inner wall of the heat preservation barrel (1) is provided with a heat preservation layer (11); the storage basket (2) is movably arranged in the heat preservation barrel (1); the storage basket (2) is provided with a plurality of through holes (21); and the lifting device (3) connects the heat preservation barrel (1) and the storage basket (2).

2. A portable liquid nitrogen device according to claim 1, characterized in that: The lifting device (3) comprises a guide rail (31) and a sliding member (32); the guide rail (31) is vertically arranged on the outside of the storage basket (2), the sliding member (32) is arranged on the heat preservation barrel (1), and the guide rail (31) and the sliding member (32) are slidably matched.

3. A portable liquid nitrogen device according to claim 2, characterized in that: The guide rail (31) is provided with a rack (311), and the sliding member (32) comprises a connecting rod (321), a gear (322), and a knob (324); the connecting rod (321) is passed through the side wall of the heat preservation barrel (1), the gear (322) is fixedly arranged on the connecting rod (321), the gear (322) and the rack (311) are meshed, and the knob (324) is fixedly arranged on one end of the connecting rod (321) located outside the heat preservation barrel (1).

4. A portable liquid nitrogen device according to claim 3, characterized in that: The guide rail (31) is provided with a limiting groove (312), and the rack (311) and the limiting groove (312) are arranged at intervals along the axial direction of the sliding member (32); the sliding member (32) also includes an expansion snap ring (323), and one end of the connecting rod (321) is provided with a top head (3211), and the expansion snap ring (323) can be horizontally slidably mounted on the connecting rod (321), and the top head (3211) is located in the expansion snap ring (323), and one end of the expansion snap ring (323) can be slidably arranged in the limiting groove (312) up and down.

5. A portable liquid nitrogen device according to claim 4, characterized in that: The expansion clamp (323) includes a collar (3231), a plurality of extension strips (3232) and a plurality of support blocks (3233); the diameter of the inner ring of the collar (3231) is larger than the outer diameter of the connecting rod (321); the plurality of extension strips (3232) are arranged around and at intervals, one end of the extension strip (3232) is fixedly arranged on an end face of the collar (3231), each support block (3233) is correspondingly arranged on the other end of one of the extension strips (3232), the support block (3233) is slidably arranged in the limiting groove (312), and a side surface of the support block (3233) close to the axis is an inclined surface, and the inclined surface deviates radially in the direction of the collar (3231).

6. A portable liquid nitrogen device according to claim 2, characterized in that: The guide rail (31) further comprises a limit block (313), wherein the limit block (313) is arranged at the top end of the guide rail (31).

7. A portable liquid nitrogen device according to claim 1, characterized in that: It also comprises a handle (4), wherein the handle (4) is rotatably arranged on the outside of the heat preservation barrel (1).

8. A portable liquid nitrogen device according to claim 1, characterized in that: It also comprises a pair of handles (5), wherein the two handles (5) are arranged on both sides of the heat preservation bucket (1).

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