Liquid nitrogen refrigeration device

Abstract

The utility model discloses a liquid nitrogen refrigeration device which comprises a tank body, a tank cover hinged to the top of the tank body, first storage racks evenly distributed and arranged in an inner cavity of the tank body in a surrounding mode, a gland inserted in a tank opening of the tank body, a second storage rack and a liquid nitrogen storage rack, the first storage rack is arranged in the inner cavity of the tank body, located in a cavity defined by the first storage racks and used for containing articles to be refrigerated; and the lifting and placing assembly is fixedly arranged at the top of the second storage rack and used for lifting the second storage rack out of the inner cavity of the tank body and placing the second storage rack into the inner cavity of the tank body. The second storage rack is arranged in the cavity defined by the first storage rack, so that the unutilized space in the tank body is filled, and the utilization rate of the space of the inner cavity of the tank body is increased; by arranging the lifting and placing assembly on the second storage rack and designing the lifting and placing assembly into a telescopic form, the covering process and air tightness of the gland are not affected, and the convenience and safety of operation are guaranteed.

Description

Technical Field

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

[0002] Liquid nitrogen is a liquid formed by cooling nitrogen gas to below its boiling point, and a liquid nitrogen refrigeration device is a device that uses liquid nitrogen as a cooling medium and is used for low-temperature freezing and refrigeration applications. Its working principle is that by injecting liquid nitrogen into the freezing chamber or freezer, the liquid nitrogen absorbs a large amount of heat when it evaporates, so that the freezing chamber can maintain an extremely low temperature to achieve the purpose of cryogenic preservation. It is often used in scenarios such as scientific experiments, food freezing, biomedical storage, etc. that require an extremely low temperature environment.

[0003] In order to ensure the refrigeration effect, the commonly used tank-shaped liquid nitrogen refrigeration device generally has a smaller tank mouth. When putting items in, the items to be refrigerated must be placed on a special rack first, and then multiple racks containing the items to be refrigerated are arranged in the tank. The racks are provided with lifting rods, and the operator puts in and takes out the racks through the lifting rods. In actual use, after the multiple racks are arranged in the tank, they surround each other to form a columnar cavity, and the space in the tank is not fully utilized, which reduces the space utilization rate of the liquid nitrogen refrigeration device.

[0004] To this end, the present application specifically proposes a liquid nitrogen refrigeration device to solve the above technical problems. Utility Model Content

[0005] The main purpose of the utility model is to solve the above-mentioned shortcomings and provide a liquid nitrogen refrigeration device, which can fully utilize the internal space of the tank-shaped liquid nitrogen refrigeration device and improve its space utilization rate.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A liquid nitrogen refrigeration device comprises a tank body, a tank cover hingedly arranged on the top of the tank body, first racks evenly arranged and arranged around the inner cavity of the tank body, and a pressure cover inserted at the tank mouth of the tank body, and further comprises: a second rack arranged in the inner cavity of the tank body and located in a cavity surrounded by a plurality of the first racks, for placing items to be refrigerated; and a lifting and placing assembly fixedly arranged on the top of the second rack, for lifting and placing the second rack into and out of the inner cavity of the tank body.

[0008] Furthermore, the second storage rack is cylindrical as a whole, and is formed by hingedly splicing a first semi-cylindrical frame and a second semi-cylindrical frame, wherein one end of the first semi-cylindrical frame and the second semi-cylindrical frame are hinged and the other end is fixed by inserting a positioning pin.

[0009] Furthermore, the first semi-cylindrical frame includes a plurality of evenly spaced first storage plates and a plurality of first connecting rods fixedly disposed between adjacent first storage plates, and the second semi-cylindrical frame includes a plurality of evenly spaced second storage plates and a plurality of second connecting rods fixedly disposed between adjacent second storage plates.

[0010] Furthermore, the first storage plate is semicircular as a whole, and a plurality of accommodating grooves for accommodating the first storage rack lifting rods are provided at the arc edge, first protrusions are provided at both ends of the plane side of the first storage plate, and second protrusions for inserting the first protrusions are provided at both ends of the second storage plate.

[0011] Furthermore, the lifting and placing assembly includes a sleeve fixedly arranged on the top of the second storage rack, a spring arranged in the sleeve and with one end abutting against the bottom of the inner cavity of the sleeve, and a telescopic rod with one end inserted in the sleeve and the other end extending out of the sleeve, and one end of the telescopic rod is inserted into the sleeve and abuts against the top of the spring.

[0012] Furthermore, a lifting handle is fixedly provided on one end of the telescopic rod extending out of the sleeve.

[0013] The beneficial effects of the utility model are embodied in:

[0014] The utility model fills the unused space in the tank body by arranging the second storage rack in the cavity surrounded by the first storage rack, thereby improving the utilization rate of the inner cavity space of the tank body; by arranging the lifting and placing assembly on the second storage rack, and designing the lifting and placing assembly to be retractable, when the pressure cover is closed, the lifting and placing assembly is retracted into the inner cavity of the tank body, which will not affect the closing process and air tightness of the pressure cover; when the pressure cover is opened, the lifting and placing assembly automatically extends out of the inner cavity of the tank body, and the operator can lift and pull the lifting and placing assembly near the tank mouth without putting his hand into the tank body, thereby ensuring the convenience and safety of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of a second storage rack in a refrigerated state according to an embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the overall structure of the second storage rack according to an embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the overall structure of the first semi-cylindrical frame of an embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the first storage plate and the second storage plate in one embodiment of the utility model;

[0021] Figure 6 This is a schematic diagram of the overall structure of the second storage rack according to an embodiment of the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of a lifting and placing assembly according to an embodiment of the utility model;

[0023] Figure 8 This is a schematic diagram of a second storage rack in a taken-out state according to an embodiment of the utility model.

[0024] In the figure: 1. tank body; 2. tank cover; 3. first storage rack; 4. pressure cover; 5. second storage rack; 51. first semi-cylindrical rack; 511. first storage plate; 512. first connecting rod; 52. second semi-cylindrical rack; 521. second storage plate; 522. second connecting rod; 6. lifting and lowering assembly; 61. sleeve; 62. spring; 63. telescopic rod; 7. positioning pin; 8. receiving groove; 9. first protrusion; 10. second protrusion; 11. lifting handle. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0026] like Figure 1-8 As shown, the utility model provides a liquid nitrogen refrigeration device, including a tank body 1, a tank cover 2 hingedly arranged on the top of the tank body 1, a first storage rack 3 evenly arranged and arranged around the inner cavity of the tank body 1, and a pressure cover 4 inserted at the tank mouth of the tank body 1, and also includes:

[0027] The second storage rack 5 is arranged in the inner cavity of the tank body 1 and is located in the cavity surrounded by the plurality of first storage racks 3, and is used for placing items to be refrigerated;

[0028] The lifting and placing assembly 6 is fixedly arranged on the top of the second storage rack 5 and is used for lifting the second storage rack 5 out of and placing it into the inner cavity of the tank body 1 .

[0029] When in use, first open the can cover 2 and the pressure cover 4, put the multiple first racks 3 with the items to be refrigerated into the inner cavity of the can body 1 one by one and surround them, then lift the second rack 5 through the lifting and placing assembly 6 and put it into the inner cavity of the can body 1, filling the cavity surrounded by the multiple first racks 3, thereby improving the utilization rate of the internal space of the can body 1.

[0030] In one embodiment, the second storage rack 5 is cylindrical in shape as a whole, and is formed by hingedly joining a first semi-cylindrical rack 51 and a second semi-cylindrical rack 52 . One end of the first semi-cylindrical rack 51 and the second semi-cylindrical rack 52 are hinged and fixed by inserting a positioning pin 7 at the other end.

[0031] like Figure 3 As shown, with such a design, when placing items in the second storage rack 5, first pull out the positioning pin 7 and rotate the first semi-cylindrical frame 51 and the second semi-cylindrical frame 52 around the hinge axis to open, then put the items to be refrigerated into the interlayer, then close the first semi-cylindrical frame 51 and the second semi-cylindrical frame 52 and insert the positioning pin 7 into the closed end, so as to complete the stable placement of the items to be refrigerated and prevent the items from falling during the process of placing the items in the second storage rack 5 and taking them out of the tank body 1. The same applies to the step of taking out the items to be refrigerated from the second storage rack 5.

[0032] In one embodiment, the first semi-cylindrical frame 51 includes a plurality of evenly spaced first storage plates 511 and a plurality of first connecting rods 512 fixedly disposed between adjacent first storage plates 511 , and the second semi-cylindrical frame 52 includes a plurality of evenly spaced second storage plates 521 and a plurality of second connecting rods 522 fixedly disposed between adjacent second storage plates 521 .

[0033] like Figure 3 and Figure 4 As shown, in this design, multiple first connecting rods 512 connect multiple first storage plates 511 to form a whole, and the items to be refrigerated can be placed in the interlayer between adjacent first storage plates 511. The second semi-cylindrical frame 52 has the same main structure as the first semi-cylindrical frame 51.

[0034] In one embodiment, the first storage plate 511 is semicircular as a whole, and a plurality of accommodating grooves 8 for accommodating the lifting rods of the first storage rack 3 are provided at the arc edge. First protrusions 9 are provided at both ends of the planar side of the first storage plate 511, and second protrusions 10 for inserting the first protrusions 9 are provided at both ends of the second storage plate 521.

[0035] like Figure 5 and Figure 6As shown, the first protrusion 9 at the same end of the same group of the first storage plate 511 and the second storage plate 521 is inserted into the second protrusion 10, and a hinge shaft is used to pass through the first protrusion 9 and the second protrusion 10 at the same time to realize the hinge between the first storage plate 511 and the second storage plate 521, and the positioning pin 7 is inserted into the first protrusion 9 and the second protrusion 10 at the other end of the first storage plate 511 and the second storage plate 521 to lock the two storage plates.

[0036] In one embodiment, the lifting and placing assembly 6 includes a sleeve 61 fixedly arranged on the top of the second storage rack 5, a spring 62 arranged in the sleeve 61 and with one end abutting against the bottom of the inner cavity of the sleeve 61, and a telescopic rod 63 with one end inserted in the sleeve 61 and the other end extending out of the sleeve 61, and one end of the telescopic rod 63 is inserted into the sleeve 61 and abuts against the top of the spring 62.

[0037] like Figure 7 and Figure 8 As shown, when the second storage rack 5 is in the inner cavity of the tank body 1 and the pressure cover 4 is not covered, the spring 62 pushes the telescopic rod 63 to extend out of the sleeve 61, and the top end of the telescopic rod 63 is located near the tank mouth of the tank body 1, which is convenient for the operator to take out and put in the second storage rack 5; Figure 2 As shown, when the gland cover 4 is put on, the gland cover 4 presses the telescopic rod 63 and drives the telescopic rod 63 to retract into the sleeve 61, which does not affect the closing process of the gland cover 4.

[0038] In one embodiment, a lifting handle 11 is fixedly provided on one end of the telescopic rod 63 extending out of the sleeve 61 .

[0039] like Figure 7 As shown, the operator can grasp the lifting handle 11 to operate when taking out and putting in the second storage rack 5, which is convenient for taking.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

Claims

1. A liquid nitrogen refrigeration device, comprising a tank body (1), a tank cover (2) hingedly arranged on the top of the tank body (1), a first storage rack (3) evenly arranged and arranged around the inner cavity of the tank body (1), and a pressure cover (4) inserted at the tank mouth of the tank body (1), It is characterized in that Also includes: A second storage rack (5), arranged in the inner cavity of the tank body (1) and located in a cavity surrounded by a plurality of the first storage racks (3), and used for placing items to be refrigerated; A lifting and placing assembly (6) is fixedly arranged on the top of the second storage rack (5) and is used for lifting the second storage rack (5) out of and placing it into the inner cavity of the tank body (1).

2. A liquid nitrogen refrigeration device as claimed in claim 1, It is characterized in that The second storage rack (5) is cylindrical in shape as a whole and is formed by hingedly joining a first semi-cylindrical rack (51) and a second semi-cylindrical rack (52); one end of the first semi-cylindrical rack (51) and the second semi-cylindrical rack (52) are hinged and the other end is fixed by inserting a positioning pin (7).

3. A liquid nitrogen refrigeration device as claimed in claim 2, It is characterized in that The first semi-cylindrical frame (51) comprises a plurality of evenly spaced first storage plates (511) and a plurality of first connecting rods (512) fixedly arranged between adjacent first storage plates (511), and the second semi-cylindrical frame (52) comprises a plurality of evenly spaced second storage plates (521) and a plurality of second connecting rods (522) fixedly arranged between adjacent second storage plates (521).

4. A liquid nitrogen refrigeration device as claimed in claim 3, It is characterized in that The first storage plate (511) is semicircular in shape as a whole, and a plurality of receiving grooves (8) for receiving lifting rods of the first storage rack (3) are provided at the arc edge; first protrusions (9) are provided at both ends of the plane side of the first storage plate (511), and second protrusions (10) for inserting the first protrusions (9) are provided at both ends of the second storage plate (521).

5. A liquid nitrogen refrigeration device as claimed in claim 1, It is characterized in that The lifting and placing assembly (6) comprises a sleeve (61) fixedly arranged on the top of the second storage rack (5), a spring (62) arranged in the sleeve (61) and with one end abutting against the bottom of the inner cavity of the sleeve (61), and a telescopic rod (63) with one end inserted in the sleeve (61) and the other end extending out of the sleeve (61); one end of the telescopic rod (63) is inserted into the sleeve (61) and abuts against the top of the spring (62).

6. A liquid nitrogen refrigeration device as claimed in claim 5, It is characterized in that A lifting handle (11) is fixedly provided on one end of the telescopic rod (63) extending out of the sleeve (61).

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