A detachable variable temperature Dewar

Abstract

This utility model relates to the field of Dewar technology and discloses a detachable variable temperature Dewar, which includes a shell, a Dewar body disposed inside the shell, a fixing ring fixed to the outer wall of the shell, and a positioning mechanism disposed inside the fixing ring. The positioning mechanism is used to position the Dewar body. Two valves are disposed at the upper end of the Dewar body, and a protective mechanism is disposed at the upper end of the Dewar body to protect the valves. Through the setting of the positioning mechanism, the mechanism cooperates with the positioning groove of the Dewar body through four circumferentially distributed positioning blocks. Under the action of spring force, the positioning blocks are always tightly abutting the positioning groove, effectively preventing the Dewar body from shaking inside the shell and ensuring its stable position. At the same time, when it is necessary to remove the Dewar body, simply lift it up to disengage the positioning blocks from the positioning groove, which is simple to operate and facilitates the removal and placement of the Dewar body.

Description

Technical Field

[0001] This invention belongs to the field of Dewar technology, specifically a variable temperature Dewar that is easy to disassemble. Background Technology

[0002] Dewars, as key devices for storing and transferring media in cryogenic or constant-temperature environments, effectively block heat exchange between the inside and outside thanks to their special thermal insulation structure and sealed design. This provides a stable environment for cryogenic media such as liquid nitrogen and liquid helium, or for biological samples and chemical reagents requiring constant-temperature preservation. They are widely used in scientific research, medical storage, aerospace engineering, and other fields, serving as a core device for ensuring the application of cryogenic technology and the safety of precision media.

[0003] Traditional variable temperature Dewars have two limitations: first, the Dewar body and the outer protective shell are mostly fixedly connected, making disassembly cumbersome during inspection, replacement of internal components, and cleaning; second, the upper valve is exposed and is easily damaged by collisions and friction, affecting its use and potentially causing media leakage. Therefore, this application proposes a variable temperature Dewar that is easy to disassemble. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a variable temperature Dewar that is easy to disassemble, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a detachable variable temperature Dewar, comprising a shell, a Dewar body disposed inside the shell, a fixing ring fixed to the outer wall of the shell, a positioning mechanism disposed inside the fixing ring for positioning the Dewar body, two valves disposed at the upper end of the Dewar body, and a protection mechanism disposed at the upper end of the Dewar body for protecting the valves.

[0006] Preferably, the positioning mechanism includes four sleeves, which are circumferentially distributed inside the fixed ring. The sleeves are slidably connected to abutment blocks. A connecting rod is fixedly connected to one side of the abutment block. One end of the connecting rod extends into the outer shell and is fixedly connected to a positioning block. The exterior of the Dewar body is provided with positioning grooves corresponding to the four sleeves, and the positioning blocks are in movable contact with the positioning grooves.

[0007] Preferably, a spring is provided inside the sleeve, one side of the spring abutting against one side of the abutting block, and the other side of the spring abutting against the inner wall of the sleeve.

[0008] Preferably, the protection mechanism includes a mounting box, the valve is located inside the mounting box, a rotating groove is provided on one side of the mounting box, a rotating shaft is rotatably connected inside the rotating groove, the two ends of the rotating shaft extend to the two sides of the mounting box respectively, a mounting block is fixed to the outside of the rotating shaft, the mounting block is located in the rotating groove, and a movable plate is fixedly connected to the lower outside of the mounting block.

[0009] Preferably, a locking block is provided on one side of the mounting box, and the locking block is externally threaded to the rotating shaft.

[0010] Preferably, the Dewar body has a liquid tube inside, the lower end of the outer shell is fixedly connected to a support, and the Dewar body is placed on the upper end of the support.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. Through the setting of the positioning mechanism, the mechanism uses four circumferentially distributed positioning blocks to cooperate with the positioning groove of the Dewar body. Under the action of spring force, the positioning blocks are always tightly pressed against the positioning groove, which effectively prevents the Dewar body from shaking inside the shell and ensures its stable position. At the same time, when it is necessary to remove the Dewar body, simply lift it up to disengage the positioning blocks from the positioning groove. The operation is simple and convenient for taking out and putting in the Dewar body.

[0013] 2. Through the setting of the protection mechanism, the valve is wrapped inside the mounting box to form physical protection, which can prevent the valve from being damaged by external collisions, etc.; the movable plate can be opened and closed flexibly through the rotating shaft. When closed, it can shield the valve for protection, and when opened, it can expose the valve for functional operation. The locking block can fix the state of the movable plate, which is flexible in use and reliable in protection. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the attached diagram:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the positioning mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the protective mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure of the mounting box of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure of the outer shell of this utility model.

[0021] In the diagram: 1. Outer shell; 2. Dewar body; 3. Fixing ring; 4. Positioning mechanism; 5. Valve; 6. Protection mechanism; 401. Sleeve; 402. Abutment block; 403. Connecting rod; 404. Positioning block; 405. Positioning groove; 406. Spring; 601. Mounting box; 602. Rotating groove; 603. Rotating shaft; 604. Mounting block; 605. Movable plate; 606. Locking block; 7. Liquid pipe; 8. Support. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Depend on Figures 1 to 5 As shown, this utility model includes a shell 1, a Dewar body 2 is disposed inside the shell 1, a fixing ring 3 is fixed to the outer wall of the shell 1, a positioning mechanism 4 is disposed inside the fixing ring 3, the positioning mechanism 4 is used to position the Dewar body 2, two valves 5 are disposed at the upper end of the Dewar body 2, and a protection mechanism 6 is disposed at the upper end of the Dewar body 2, the protection mechanism 6 is used to protect the valves 5.

[0024] The overall structure uses the outer shell 1 as the external carrier, and the Dewar body 2 is housed inside. The positioning mechanism 4 on the fixing ring 3 fixes the position of the Dewar body 2 to prevent it from shaking inside the outer shell 1. The two valves 5 at the upper end of the Dewar body 2 are used for functional operation, and the protection mechanism 6 provides physical protection for the valves 5.

[0025] The positioning mechanism 4 includes four sleeves 401, which are circumferentially distributed inside the fixing ring 3. The sleeves 401 are slidably connected to the abutment block 402. A connecting rod 403 is fixedly connected to one side of the abutment block 402. One end of the connecting rod 403 extends into the outer shell 1 and is fixedly connected to the positioning block 404. The outside of the Dewar body 2 is provided with positioning grooves 405 corresponding to the four sleeves 401. The positioning block 404 is in movable contact with the positioning groove 405.

[0026] The positioning mechanism 4 consists of four circumferentially distributed sleeves 401. The abutment block 402 inside the sleeve 401 is slidable and drives the positioning block 404 to move synchronously through the connecting rod 403. The positioning groove 405 on the outside of the Dewar body 2 corresponds to the position of the positioning block 404. When the positioning block 404 is embedded in the positioning groove 405, the circumferential positioning of the Dewar body 2 is achieved.

[0027] A spring 406 is provided inside the sleeve 401. One side of the spring 406 abuts against one side of the abutting block 402, and the other side of the spring 406 abuts against the inner wall of the sleeve 401.

[0028] The spring 406 inside the sleeve 401 is in a compressed state, and its elastic force applies a pushing force to the abutment block 402, pushing the abutment block 402, connecting rod 403 and positioning block 404 to move towards the Dewar body 2, so that the positioning block 404 is always in close contact with the positioning groove 405; when it is necessary to remove the Dewar body 2, the Dewar body 2 is lifted up so that the positioning block 404 is disengaged from the positioning groove 405, and the positioning is released.

[0029] The protection mechanism 6 includes a mounting box 601, a valve 5 located inside the mounting box 601, a rotating groove 602 opened on one side of the mounting box 601, a rotating shaft 603 rotatably connected inside the rotating groove 602, the two ends of the rotating shaft 603 extending to the two sides of the mounting box 601 respectively, a mounting block 604 fixed to the outside of the rotating shaft 603, the mounting block 604 located inside the rotating groove 602, and a movable plate 605 fixedly connected to the lower outside of the mounting block 604;

[0030] The mounting box 601 of the protection mechanism 6 encloses the valve 5 to form a protective space; when the rotating shaft 603 rotates in the rotating groove 602, it drives the movable plate 605 to rotate synchronously through the mounting block 604. The movable plate 605 can open and close around the rotating shaft 603. When closed, it covers the valve 5, and when open, it exposes the valve 5 for operation.

[0031] A locking block 606 is provided on one side of the mounting box 601, and the locking block 606 is connected to the external thread of the rotating shaft 603.

[0032] The locking block 606 is threadedly connected to the rotating shaft 603. When the movable plate 605 rotates to the closed protection state, the locking block 606 is rotated to make it tightly abut against the side of the mounting box 601, and the rotating shaft 603 is fixed by friction, thereby locking the movable plate 605. To release, the locking block 606 is rotated in the opposite direction.

[0033] The Dewar body 2 has a liquid tube 7 inside, and a support 8 is fixedly connected to the lower end of the inner shell 1. The Dewar body 2 is placed on the upper end of the support 8.

[0034] The liquid tube 7 inside the Dewar body 2 is used to transmit the temperature control medium, and the "variable temperature" function is realized through the circulation of the medium; the support 8 at the lower end of the outer shell 1 directly supports the Dewar body 2;

[0035] Working principle: In use, the positioning mechanism 4 consists of four sleeves 401 circumferentially distributed inside the fixed ring 3. The abutment blocks 402 inside the sleeves 401 are slidable. Under the elastic force of the springs 406 inside the sleeves 401, the abutment blocks 402 drive the positioning blocks 404 towards the Dewar body 2 via the connecting rod 403, causing the positioning blocks 404 to embed into the corresponding positioning grooves 405 on the outside of the Dewar body 2, thus achieving circumferential positioning of the Dewar body 2 and ensuring its stable position. When it is necessary to remove the Dewar body 2, lift the Dewar body 2 to disengage the positioning blocks 404 from the positioning grooves 405, thereby releasing the positioning state; the mounting box of the protection mechanism 6... The valve 5 is enclosed within the mounting box 601, forming a protective space. When the rotating shaft 603 rotates within the rotating groove 602, it drives the movable plate 605 to rotate synchronously via the mounting block 604. When the movable plate 605 is closed, it can shield the valve 5, providing protection. At this time, the locking block 606, which is threadedly connected to the rotating shaft 603, is rotated to make it tightly abut against the side of the mounting box 601. The rotating shaft 603 is fixed by friction, thereby locking the movable plate 605 and maintaining the protective state. When it is necessary to operate the valve 5, the locking block 606 is rotated in the opposite direction to release the fixation, and the movable plate 605 is rotated to open it, exposing the valve 5 for relevant functional operations.

Claims

1. A variable temperature dewar for easy disassembly comprising a housing (1), characterised in that: The shell (1) is provided with a Dewar body (2) inside. A fixing ring (3) is fixed to the outer wall of the shell (1). A positioning mechanism (4) is provided inside the fixing ring (3). The positioning mechanism (4) is used to position the Dewar body (2). Two valves (5) are provided at the upper end of the Dewar body (2). A protection mechanism (6) is provided at the upper end of the Dewar body (2). The protection mechanism (6) is used to protect the valves (5).

2. A variable temperature dewar for easy disassembly as claimed in claim 1, wherein: The positioning mechanism (4) includes four sleeves (401), which are circumferentially distributed inside the fixing ring (3). The sleeves (401) are slidably connected to the abutment block (402). A connecting rod (403) is fixedly connected to one side of the abutment block (402). One end of the connecting rod (403) extends into the outer shell (1) and is fixedly connected to the positioning block (404). The Dewar body (2) has a positioning groove (405) corresponding to the four sleeves (401) on its outside. The positioning block (404) is in contact with the positioning groove (405).

3. A variable temperature dewar for easy disassembly as claimed in claim 2 wherein: A spring (406) is provided inside the sleeve (401). One side of the spring (406) abuts against one side of the abutting block (402), and the other side of the spring (406) abuts against the inner wall of the sleeve (401).

4. The variable temperature dewar of claim 1, wherein: The protection mechanism (6) includes a mounting box (601), the valve (5) is located inside the mounting box (601), a rotating groove (602) is provided on one side of the mounting box (601), a rotating shaft (603) is rotatably connected inside the rotating groove (602), the two ends of the rotating shaft (603) extend to the two sides of the mounting box (601) respectively, a mounting block (604) is fixed outside the rotating shaft (603), the mounting block (604) is located inside the rotating groove (602), and a movable plate (605) is fixedly connected to the lower outer side of the mounting block (604).

5. A variable temperature dewar for easy disassembly as claimed in claim 4 wherein: A locking block (606) is provided on one side of the mounting box (601), and the locking block (606) is externally threaded to the rotating shaft (603).

6. A variable temperature dewar for easy disassembly as defined in claim 1, wherein: The Dewar body (2) has a liquid tube (7) inside, and a support (8) is fixedly connected to the lower end of the inner shell (1). The Dewar body (2) is placed on the upper end of the support (8).

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