Liquid nitrogen tank convenient for storing and taking cryopreservation box

Abstract

The utility model provides a liquid nitrogen tank convenient for storing and taking a cryopreservation box, and belongs to the field of liquid nitrogen cryopreservation tanks. According to the technical scheme, the liquid nitrogen container comprises a base, a shell, an inner container, a neck tube and a container opening, a plurality of clamping grooves matched with hooks of a lifting basket are formed in the container opening, the hooks are clamped in the clamping grooves, a rotating disc is arranged in the center of the bottom in the liquid nitrogen container, and a thin arc-shaped plate sliding along the inner wall face of the neck tube is arranged on the rotating disc. The liquid nitrogen tank has the beneficial effects that the liquid nitrogen tank is simple in structure, and the lifting basket in which the cryopreservation box is stored can be always kept vertical during storage and taking through the limiting rod and the long clamping plate, so that inclination is avoided, and the liquid nitrogen tank can be smoothly stored and taken.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of liquid nitrogen storage tank field, especially a kind of liquid nitrogen tank facilitating access to freeze box. BACKGROUND

[0002] The structure inside the liquid nitrogen tank is usually designed to facilitate upright placement and storage of freeze boxes. The liquid nitrogen tank has a relatively narrow neck, which is intended to reduce the evaporation of liquid nitrogen. When the freeze boxes are normally placed, they are closely matched with the neck and the space inside the tank. When the freeze boxes are tilted (the freeze boxes are usually placed on a basket, so this can also refer to when the basket is tilted), their shape and angle change in relation to the neck and the surrounding space. For example, the diameter of the neck is designed according to the normal upright size of the freeze boxes. The diagonal length or irregular edge of the tilted freeze boxes may exceed the appropriate passing range of the neck, ultimately causing the freeze boxes to be stuck at the edge of the neck.

[0003] Therefore, the present application provides a liquid nitrogen tank that facilitates access to freeze boxes. SUMMARY

[0004] The purpose of the present utility model is to provide a liquid nitrogen tank that is easy to operate and prevents inconvenience in accessing freeze boxes due to tilting of the freeze boxes.

[0005] The present utility model is achieved through the following measures:

[0006] A liquid nitrogen tank that facilitates access to freeze boxes, comprising a base, an outer shell, an inner container, a neck, and a tank opening. The base serves to support the entire liquid nitrogen tank, allowing it to be stably placed on the ground or a laboratory bench. A vacuum insulation layer exists between the outer shell and the inner container. The liquid nitrogen tank stores a basket that holds freeze boxes. The basket includes a vertical rod and several layers of shelves on one side of the vertical rod for storing freeze boxes. A U-shaped hook is provided at the upper end of the vertical rod to hang the entire basket at the edge of the tank opening. Since the basket is prior art, it will not be described in detail. The tank opening is provided with several groups of card slots that cooperate with the hooks of the basket. The hooks are inserted into the card slots. The part of the hooks facing the outside is inside the card slots, which does not affect the tight sealing of the sealing cover at the tank opening. A turntable is provided at the center of the bottom of the liquid nitrogen tank. A thin arc-shaped plate is provided on the turntable and slides along the inner wall of the neck. The thin arc-shaped plate limits the position of the basket, allowing it to remain upright and not tilted during access.

[0007] The specific features of the present utility model also include:

[0008] The middle part of the upper end face of the thin arc-shaped plate is provided with a slot, a matched arc-shaped long plate is slidably arranged in the slot, a limiting rod is arranged on the upper end of the arc-shaped long plate, a through hole matched with the limiting rod is arranged on the vertical rod of the basket, the basket is slid through the through hole to the periphery of the limiting rod and is attached to the inner wall of the thin arc-shaped plate, then the basket is lifted up, the basket is further limited by the limiting rod, and tilting in the direction of the limiting rod is prevented.

[0009] The limiting rod is a telescopic rod, the telescopic rod comprises an outer tube matched with the through hole and fixed on the arc-shaped long plate, an inner rod is slidably arranged in the outer tube, and the outer tube is longer than the inner rod; in use, the inner rod is first elongated and inserted into the through hole, then the basket is lifted up so that the hook is separated from the clamping groove, and then the basket is slid onto the outer tube and attached to the inner wall of the thin arc-shaped plate.

[0010] A long clamping plate is vertically arranged in the middle part of the inner wall of the thin arc-shaped plate, a long slot that is matched with the long clamping plate and penetrates up and down is arranged on the vertical rod, when the basket is attached to the inner wall of the thin arc-shaped plate, the long clamping plate is clamped in the long slot and the vertical rod slides along the long clamping plate, so that tilting of the basket relative to the vertical direction of the limiting rod is prevented during lifting or lowering.

[0011] A ratchet mechanism is further arranged;

[0012] The ratchet mechanism comprises a mounting slot arranged on the upper end face of the long clamping plate, a pair of support plates are arranged in the mounting slot, a rotating shaft is arranged between the pair of support plates, a ratchet wheel is arranged on the periphery of the rotating shaft, and a pawl matched with the ratchet wheel is arranged on one side of the ratchet wheel;

[0013] One end of the rotating shaft protrudes out of the corresponding side support plate and is provided with a gear on the periphery, a sliding groove one is arranged on the wall surface of the slot close to the long clamping plate, a rack engaged with the gear is slidably arranged in the sliding groove one, and the back surface of the rack is fixed on the arc-shaped long plate; during upward movement of the arc-shaped long plate along with the basket, the rack drives the gear to rotate, thereby driving the rotating shaft to rotate, and the cooperation between the pawl and the ratchet wheel enables the basket to be stopped at any time during upward movement, thereby facilitating the taking of part of the cryopreservation boxes.

[0014] A sliding groove two is arranged between the two side support plates, a sliding block is arranged in each of the two side sliding grooves two, a circular shaft is arranged between the two side sliding blocks, the pawl matched with the ratchet wheel is rotatably arranged on the periphery of the circular shaft, a torsional spring is arranged on the periphery of the circular shaft on both sides of the pawl, one end of the torsional spring is fixed on the pawl, and the other end of the torsional spring is fixed on the corresponding side sliding block;

[0015] One end of the slider away from the round shaft is extended and provided with a threaded hole, a matched screw rod is arranged through the threaded hole, one end of the screw rod is rotatably arranged on the inner wall surface of the mounting groove, the other end of the screw rod is provided with a handle, the sliding groove of the corresponding side penetrates through the support plate, the handle is rotated, the slider is driven to slide through the rotation of the screw rod, so that the disengagement of the pawl and the ratchet wheel can be realized.

[0016] The periphery of the handle is rotated upwards and protrudes from the mounting groove, so that the handle is conveniently rotated, and the hand does not need to be inserted into the mounting groove to rotate the handle.

[0017] When the frozen storage box is taken out, first, the sealing cover of the liquid nitrogen tank is opened, then the inner rod is extended and inserted into the through hole, then the basket is lifted to make the hook disengage from the clamping groove, then the basket is slid onto the outer pipe and abuts against the inner wall of the thin arc-shaped plate, in this process, tilting in the direction of the limiting rod is prevented, then the long clamping plate is clamped in the long groove, and finally the basket is lifted, in the process of lifting the basket, the lifting of the basket can be stopped at any time through the ratchet mechanism, so that the corresponding frozen storage box is taken out.

[0018] The process of putting the basket is opposite, and will not be described in detail.

[0019] The liquid nitrogen tank has the advantages that: the liquid nitrogen tank has a simple structure, the limiting rod and the long clamping plate are arranged, the basket storing the frozen storage box can always be kept vertical during storage and taking, tilting is avoided, and the basket can be smoothly stored and taken. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the utility model.

[0021] Figure 2 It is Figure 1 An enlarged view of A.

[0022] Figure 3 It is a schematic diagram of the structure of the related components of the thin arc-shaped plate in the embodiment of the utility model.

[0023] Figure 4 It is Figure 3 An enlarged view of B.

[0024] Among them, the reference signs are: 1, the shell; 2, the hook; 3, the tank opening; 4, the long clamping plate; 5, the thin arc-shaped plate; 6, the arc-shaped long plate; 7, the rack; 8, the limiting rod; 9, the long groove; 10, the rotating disc; 11, the pawl; 13, the pawl; 14, the ratchet wheel; 15, the screw rod. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other in the case of no conflict.

[0026] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0027] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.

[0028] In order to clearly illustrate the technical features of the scheme, the scheme will be described below through specific embodiments.

[0029] Referring to Figures 1-4The utility model provides a liquid nitrogen tank convenient for accessing cryopreservation box, including base, shell 1, inner container, neck pipe and tank mouth 3, the main function of base is to support whole liquid nitrogen tank, can stably place on the ground or experiment table, there is a vacuum heat insulation layer between shell 1 and inner container, liquid nitrogen tank stores the basket of storing cryopreservation box, the basket includes vertical rod and the support frame of the several layers for storing cryopreservation box in the vertical rod one side, the upper end of vertical rod is provided with the hook 2 of U shape, for the whole basket is hung in the rim of tank mouth 3, because the basket belongs to prior art, no longer in detail, tank mouth 3 is provided with several groups and the hook 2 cooperation of basket's card slot, hook 2 is in the card slot, the part of hook 2 towards outside is in the card slot, like this does not affect the tight sealing of the sealing cover of tank mouth 3, the bottom center of liquid nitrogen tank is provided with carousel 10, carousel 10 is provided with the thin arc plate 5 of along neck pipe inner wall surface sliding, through the thin arc plate 5, the limiting of basket is realized, can keep vertical and not tilt when storing and accessing.

[0030] The upper end surface middle part of thin arc plate 5 is provided with the slot, the arc long plate 6 of cooperation is slidably arranged in the slot, the limit rod 8 is arranged on the upper end of arc long plate 6, the through hole that cooperates with limit rod 8 is arranged on the vertical rod of basket, through the through hole, the basket is slid to the periphery of limit rod 8 and is attached on the inner wall surface of thin arc plate 5, then the basket is lifted, so that the limit rod 8 further limits the basket, prevents the inclination in the direction of limit rod 8.

[0031] Limit rod 8 is telescopic rod, the telescopic rod includes the outer tube that cooperates with through hole and is fixed on arc long plate 6, the inner rod is slidably arranged in the outer tube, the outer tube is longer than the inner rod, when using, first, the inner rod is elongated, and is inserted into the through hole, then the basket is lifted, so that the hook 2 is separated from the card slot, then the basket is slid to the outer tube and is attached on the inner wall of thin arc plate 5.

[0032] The long card plate 4 is vertically arranged in the inner wall middle part of thin arc plate 5, the long slot 9 that cooperates with long card plate 4 and penetrates up and down is arranged on the vertical rod, when the basket is attached on the inner wall of thin arc plate 5, the long card plate 4 is clamped in the long slot 9, and the vertical rod slides along the long card plate 4, so that the basket is prevented from tilting in the vertical direction relative to limit rod 8 during lifting or lowering.

[0033] Also be provided with ratchet mechanism,

[0034] The ratchet mechanism includes the mounting slot on the upper end surface of long card plate 4, a pair of support plates are arranged in the mounting slot, the rotating shaft is arranged between the pair of support plates, the ratchet 14 is arranged on the periphery of rotating shaft, the pawl 13 of cooperation is arranged on one side of ratchet 14,

[0035] The outer periphery of one end of the rotating shaft is provided with a gear 11 after penetrating through the corresponding side support plate, a sliding groove one is arranged on the wall surface close to the long clamping plate 4 in the slot, a rack 12 engaged with the gear 11 is arranged in the sliding groove one in a sliding mode, and the back surface of the rack 12 is fixed on the arc-shaped long plate 6. In the process of lifting the basket, the gear 11 is driven to rotate through the rack 12, so that the rotating shaft is rotated, and the stop at any time in the lifting process is realized through the cooperation of the ratchet pawl 13 and the ratchet wheel 14, so as to facilitate taking the partial cryopreservation box.

[0036] The sliding groove two is arranged between the two side support plates, the sliding blocks are arranged in the two sliding groove two, the circular shaft is arranged between the two sliding blocks, the ratchet pawl 13 cooperated with the ratchet wheel 14 is arranged on the outer periphery of the circular shaft, the torsional springs are arranged on the outer periphery of the circular shaft on the two sides of the ratchet pawl 13, one end of the torsional spring is fixed on the ratchet pawl 13, and the other end of the torsional spring is fixed on the corresponding side sliding block.

[0037] The end, away from the circular shaft, of the one side sliding block is provided with a threaded hole after being extended, a matched lead screw 15 is arranged through the threaded hole, one end of the lead screw 15 is arranged in rotation on the inner wall surface of the mounting groove, the other end of the lead screw 15 is provided with a handle, the sliding groove two of the corresponding side penetrates through the support plate, the handle is rotated, the sliding block is driven to slide through the rotation of the lead screw 15, so that the ratchet pawl 13 and the ratchet wheel 14 can be separated.

[0038] The outer periphery of the handle is rotated to the upper side of the mounting groove, so that the handle is convenient to rotate, and the hand does not need to be inserted into the mounting groove to rotate the handle.

[0039] When the cryopreservation box is taken, first, the sealing cover of the liquid nitrogen tank is opened, then the inner rod is extended and inserted into the through hole, then the basket is lifted, the hook 2 is separated from the clamping groove, then the basket is slid onto the outer pipe and abuts against the inner wall of the thin arc-shaped plate 5, in the process, the inclination in the direction of the limiting rod 8 is prevented, then the long clamping plate 4 is clamped in the long groove 9, finally, the basket is lifted, and in the process of lifting the basket, the lifting of the basket can be stopped at any time through the ratchet mechanism, so that the corresponding cryopreservation box is taken out.

[0040] The process of putting the basket is opposite, and will not be described in detail.

[0041] The technical features not described in the utility model can be realized through or by using the prior art, and will not be described here. Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by ordinary skilled persons in the technical field within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A liquid nitrogen tank for facilitating access to cryogenic storage cassettes, comprising a base, an outer shell (1), an inner liner, a neck and a tank opening (3), characterised in that, The tank mouth (3) is provided with several groups of clamping grooves matched with the hooks (2) of the basket, the hooks (2) are clamped in the clamping grooves, the inner bottom of the liquid nitrogen tank is provided with a rotating disc (10), and the rotating disc (10) is provided with a thin arc-shaped plate (5) sliding along the inner wall surface of the neck pipe.

2. The liquid nitrogen tank for easy access to cryogenic storage boxes according to claim 1, characterized in that, A insertion slot is arranged in the middle of the upper end surface of the thin arc-shaped plate (5), a matched arc-shaped long plate (6) is slidingly arranged in the insertion slot, a limiting rod (8) is arranged on the upper end of the arc-shaped long plate (6), and a through hole matched with the limiting rod (8) is arranged on the vertical rod of the basket.

3. The liquid nitrogen tank with easy access to cryogenic storage boxes of claim 2, wherein, The limiting rod (8) is a telescopic rod, the telescopic rod comprises an outer tube matched with the through hole and fixed on the arc-shaped long plate (6), and an inner rod is slidingly arranged in the outer tube.

4. The liquid nitrogen tank with easy access to cryogenic storage boxes of claim 3, wherein, A long clamping plate (4) is vertically arranged in the middle of the inner wall of the thin arc-shaped plate (5), and a long slot (9) passing through up and down is arranged on the vertical rod and matched with the long clamping plate (4).

5. The liquid nitrogen tank with easy access to cryogenic storage boxes of claim 4, wherein, A ratchet mechanism is further arranged; The ratchet mechanism comprises a mounting slot arranged on the upper end surface of the long clamping plate (4), a pair of support plates are arranged in the mounting slot, a rotating shaft is arranged between the pair of support plates, a ratchet (14) is arranged on the periphery of the rotating shaft, and a pawl (13) matched with the ratchet (14) is arranged on one side of the ratchet (14). A gear (11) is arranged on the periphery of one end of the rotating shaft after penetrating through the corresponding side support plate, a sliding groove one is arranged on the wall surface close to the long clamping plate (4) in the insertion slot, a rack (12) meshing with the gear (11) is slidingly arranged in the sliding groove one, and the back surface of the rack (12) is fixed on the arc-shaped long plate (6).

6. The liquid nitrogen tank for easy access to cryogenic storage boxes of claim 5, wherein, A sliding groove two is arranged between the two sides of the support plate, a sliding block is arranged in each of the two sides of the sliding groove two, a circular shaft is arranged between the two sides of the sliding block, the pawl (13) matched with the ratchet (14) is rotatably arranged on the periphery of the circular shaft, torsional springs are arranged on the periphery of the circular shaft on both sides of the pawl (13), one end of the torsional spring is fixed on the pawl (13), and the other end of the torsional spring is fixed on the sliding block on the corresponding side. A threaded hole is arranged on the end of the sliding block away from the circular shaft after being elongated on one side, a matched lead screw (15) is arranged through the threaded hole, one end of the lead screw (15) is rotatably arranged on the inner wall surface of the mounting slot, the other end of the lead screw (15) is provided with a handle, and the sliding groove two on the corresponding side penetrates through the support plate.

Images