Multi-layer heat insulation liquid nitrogen pump cold box

Abstract

The utility model discloses a multi-layer heat insulation liquid nitrogen pump cold box which comprises a supporting table, a sliding way is formed in the middle of the supporting table, L-shaped sliding grooves are formed in the two sides of the sliding way, side plates are installed on the two sides of the supporting table, motors with gearboxes are installed on the side plates, two-way screws are installed on the side plates and arranged in the sliding way, and the two-way screws are arranged in the sliding way. The output end of the motor gearbox is connected with the two-way screw rod; a motor is started, a gearbox drives a two-way screw to rotate, namely, the stabilizing blocks on the two sides can stably move at the same time, under the action of the two-way screw, the two stabilizing blocks move inwards at the same time, and a long sliding strip drives a vacuum plate to be close to the outer wall of the cold box. And the thermal insulation material can be disassembled only by controlling the positive and negative rotation of the motor, and operation is convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of liquid nitrogen pump cold box, specifically relating to a multi-layer insulated liquid nitrogen pump cold box. Background Technology

[0002] Liquid nitrogen pump cold boxes are primarily used for transporting and storing liquid nitrogen, while also utilizing the low-temperature properties of liquid nitrogen for refrigeration. They are widely used in cryogenic laboratories, frozen food processing, superconducting material preparation, and the deep freezing and preservation of electronic components and semiconductor devices.

[0003] According to application number 202222894070.9, a protective device for an air separation liquid nitrogen pump is disclosed, comprising a liquid nitrogen pump assembly, an outer protective structure, and a thermal insulation structure. The liquid nitrogen pump assembly includes a liquid nitrogen pump, with connecting ports at both its front and rear ends. The thermal insulation structure is located on the outside of the liquid nitrogen pump. The outer protective structure wraps around the outside of the thermal insulation structure. Its advantages are: by using the outer protective structure and the thermal insulation structure together, external protection and thermal insulation of the air separation liquid nitrogen pump can be achieved, reducing the impact of external temperature on the operation of the air separation liquid nitrogen pump and avoiding the drawback of difficult disassembly of the wrapped thermal insulation material, thus making the function more comprehensive; the presence of the outer protective structure protects the thermal insulation structure, preventing the thermal insulation structure from being directly exposed and easily damaged, thereby ensuring the external protective effect of the thermal insulation structure on the air separation liquid nitrogen pump, and thus ensuring the protective effect of the protective device for the air separation liquid nitrogen pump.

[0004] While this patent can protect the insulation structure and prevent damage caused by direct exposure, the entire system requires bolts and nuts for installation, making the process cumbersome and extending the installation and disassembly time for workers. Furthermore, existing insulation devices only provide single-layer insulation, resulting in low insulation efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a multi-layer insulated liquid nitrogen pump cold box to solve the problems of cumbersome operation and poor insulation efficiency in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-layer insulated liquid nitrogen pump cold box includes a support platform with a slide rail in the middle and L-shaped grooves on both sides of the slide rail. Side plates are installed on both sides of the support platform, and a motor with a gearbox is installed on the side plate. A bidirectional screw is installed on the side plate and is located inside the slide rail. The output end of the motor gearbox is connected to the bidirectional screw. A stabilizing block is fitted inside the slide rail, and an insulation component is provided above the stabilizing block.

[0008] Furthermore, a slider with a threaded hole is provided in the middle of the lower part of the stabilizing block, and L-shaped limiting blocks are provided on both sides of the slider. The slider is fitted in the slide rail, and the limiting blocks are fitted in the slide groove.

[0009] Furthermore, the insulation component includes a long slide bar and a connecting block. The long slide bar is fixed above the center of the stabilizing block and has a T-shaped structure. The connecting block has a T-shaped slide rail inside and the connecting block cooperates with the long slide bar through the slide rail. A vacuum plate is connected to one side of the connecting block.

[0010] Furthermore, the vacuum plate has two symmetrical connecting blocks on its back. These connecting blocks are connected to a long sliding bar, which moves the vacuum plate closer to the outer wall of the cold box. The two connecting blocks provide stability, facilitating the smooth movement of the vacuum plate against the outer wall of the cold box.

[0011] Furthermore, handles are attached to both sides of the two connecting blocks. The handles can reinforce the fixation of the two connecting blocks, and when it is necessary to detach the two connecting blocks from the long slide bar, both hands can be placed on the handles on both sides to easily apply force to remove the vacuum plate and replace it with other insulation materials.

[0012] Furthermore, the vacuum plate has a semi-circular arc structure. The semi-circular arc shape of the vacuum plate can form a good supporting structure with the outer wall of the cylindrical cold box, enhancing the overall stability and strength, helping to resist adverse factors such as external pressure, impact and vibration, and protecting the safe operation of the cold box and its internal equipment.

[0013] Furthermore, the bottom of the long slide bar is provided with a base block. The connecting block slides on the long slide bar, and the base block supports the lowest end of the connecting block, thereby limiting the maximum installation distance of the connecting block.

[0014] Furthermore, the inner side of the vacuum plate is filled with foam material. The foam material is either polyurethane foam or polystyrene foam. Polyurethane foam has high thermal stress upon cooling and is less prone to significant shrinkage due to the low temperature of liquid nitrogen, thus maintaining a sufficient filling level. Therefore, rigid polyurethane is often used in spray foaming to achieve insulation of the device and also to provide auxiliary support for the inner container shell. Polystyrene foam is relatively inexpensive and can be used as a choice.

[0015] The technical solution of this utility model has the following beneficial effects:

[0016] 1. The cold box is placed on the support platform. The starter motor drives the bidirectional screw to rotate through the gearbox, so that the stabilizing blocks on both sides can move smoothly at the same time. Under the action of the bidirectional screw, the two stabilizing blocks move inward at the same time. The long slide bar drives the vacuum plate to approach the outer wall of the cold box. The insulation material can be disassembled by simply controlling the forward and reverse rotation of the motor. The operation is convenient.

[0017] 2. The sliding connection method, in which the T-shaped slide rail on the connecting block matches and slides into the T-shaped structure of the long slide bar, greatly simplifies the installation and replacement process of the vacuum plate. It eliminates the need for complicated fixing devices or tools, improves work efficiency, and reduces maintenance costs.

[0018] 3. The foam filling material is in direct contact with the outer wall of the cold box, which has excellent cushioning performance. It can effectively absorb and disperse the impact force from the outside, thereby protecting the outer wall of the cold box from damage. The foam filling material itself is also a good thermal insulation material. It can further reduce the heat exchange between the inside of the cold box and the outside, improve the thermal insulation performance of the cold box, and has a multi-layer thermal insulation effect. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

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

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0023] Figure 4 This is a partial disassembled schematic diagram of the present invention.

[0024] Reference numerals: 10. Support platform; 11. Slide rail; 12. Slide groove; 13. Side plate; 14. Motor; 15. Bidirectional screw; 16. Cold box; 20. Stabilizing block; 21. Slider; 22. Limiting block; 23. Bottom block; 24. Long slide bar; 25. Connecting block; 26. Slide rail; 27. Handle; 28. Vacuum plate; 29. ​​Foam filling material. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] Example 1:

[0027] refer to Figures 1-4A multi-layer insulated liquid nitrogen pump cold box includes a support platform 10; plates are installed on both sides of the bottom of the support platform 10 to stabilize the support platform 10, and a cold box 16 is placed on the surface of the support platform 10.

[0028] refer to Figures 1-4 The support platform 10 has a slide rail 11 in the middle, and L-shaped grooves 12 on both sides of the slide rail 11. Side plates 13 are installed on both sides of the support platform 10. A motor 14 with a gearbox is installed on the side plate 13. A double-ended screw 15 is installed on the side plate 13. The double-ended screw 15 is inside the slide rail 11. The output end of the gearbox of the motor 14 is connected to the double-ended screw 15. A stabilizing block 20 is fitted inside the slide rail 11. A slider 21 with a threaded hole is provided in the middle below the stabilizing block 20. L-shaped limiting blocks 22 are provided on both sides of the slider 21. The slider 21 fits in the slide rail 11, and the limiting blocks 22 fit in the grooves 12.

[0029] In the above scheme, two stabilizing blocks 20 are symmetrically installed on both sides of the support platform 10. The cooperation between the limiting block 22 and the slide groove 12, due to their L-shaped structure, provides a more stable connection and support. When the limiting block 22 slides along the slide groove 12, the L-shaped structure can effectively prevent it from falling off or tilting, thereby ensuring the overall stability of the equipment. The L-shaped limiting block 22 and slide groove 12 make the installation and disassembly process of the equipment simpler. The slider 21 with threaded holes engages with the bidirectional screw 15. The bidirectional screw 15 is driven to rotate by the gearbox through the starter motor 14, so that the stabilizing blocks 20 on both sides can move smoothly at the same time. Under the action of the bidirectional screw 15, the two stabilizing blocks 20 can move outward or inward simultaneously.

[0030] refer to Figure 2 and Figure 4 A heat insulation component is provided above the stabilizing block 20. The heat insulation component includes a long slide bar 24 and a connecting block 25. The long slide bar 24 is fixed above the center of the stabilizing block 20 and has a T-shaped structure. The connecting block 25 has a T-shaped slide rail 26 inside. The connecting block 25 cooperates with the long slide bar 24 through the slide rail 26. A vacuum plate 28 is connected to one side of the connecting block 25.

[0031] In the above scheme, when using the vacuum plate 28 to insulate the cold box 16, the slide rail 26 on the connecting block 25 is aligned and inserted into the long slide bar 24. Through a sliding connection method, that is, the T-shaped slide rail 26 on the connecting block 25 matches and slides into the T-shaped structure of the long slide bar 24, greatly simplifying the installation and replacement process of the vacuum plate 28. No complex fixing devices or tools are required, improving work efficiency and reducing maintenance costs. The displacement of the stabilizing block 20 will push the vacuum plate 28 to move, thus allowing the vacuum plate 28 to approach the outer wall of the cold box 16 and provide insulation. As an insulation material, the vacuum plate 28 has excellent thermal insulation performance, effectively reducing heat exchange between the inside and outside of the cold box 16 and maintaining a stable internal temperature.

[0032] Further Figure 4 The vacuum plate 28 has two symmetrical connecting blocks 25 on its back. The connecting blocks 25 are connected to the long slide bar 24. The long slide bar 24 moves the vacuum plate 28 closer to the outer wall of the cold box 16. The two connecting blocks 25 provide a stabilizing effect, which helps the vacuum plate 28 to smoothly approach the cold box 16 and fit against the outer wall.

[0033] Further reference Figure 4 Handles 27 are attached to both sides of the two connecting blocks 25. The handles 27 can reinforce the fixation of the two connecting blocks 25. When it is necessary to remove the two connecting blocks 25 from the long slide bar 24, you can place your hands directly on the handles 27 on both sides to easily apply force to remove the vacuum plate 28 and replace it with other insulation materials.

[0034] Further reference Figure 4 The vacuum plate 28 has a semi-circular arc structure. The semi-circular arc shape can fit well against the outer wall of the cylindrical cold box 16, reducing the existence of gaps and voids. The tight fit helps prevent cold leakage, improves the insulation performance of the cold box, and thus ensures the stability and consistency of the internal temperature of the cold box. The semi-circular arc shape of the vacuum plate 28 can form a good support structure with the outer wall of the cylindrical cold box, enhancing the overall stability and strength, helping to resist adverse factors such as external pressure, impact and vibration, and protecting the safe operation of the cold box and its internal equipment.

[0035] Further reference Figure 4 The bottom of the long slide bar 24 is provided with a base block 23. The connecting block 25 is slidably fitted on the long slide bar 24, and the base block 23 supports the lowest end of the connecting block 25, thereby limiting the maximum installation distance of the connecting block 25.

[0036] Example 2:

[0037] refer to Figure 4 The inner side of the vacuum plate 28 is provided with foam filling material 29. The foam filling material 29 can be polyurethane foam or polystyrene foam.

[0038] In the above scheme, the vacuum plate 28 is in contact with the outer wall of the cold box 16, and the foam filling material 29 is in direct contact with the outer wall of the cold box 16. It has excellent buffering performance and can effectively absorb and disperse the impact force from the outside, thereby protecting the outer wall of the cold box 16 from damage. The foam filling material 29 itself is also a good thermal insulation material. It can further reduce the heat exchange between the inside of the cold box and the outside, and improve the thermal insulation performance of the cold box. When the foam filling material 29 is tightly attached to the outer wall of the cold box, it and the vacuum plate 28 together form a highly efficient thermal insulation layer, which helps to maintain the stability of the internal temperature of the cold box.

[0039] Polyurethane foam exhibits high thermal stress upon cooling, making it less prone to significant shrinkage due to the low temperatures of liquid nitrogen, thus maintaining sufficient fill levels. Therefore, rigid polyurethane is commonly used in spray foaming for insulation and to provide additional support for the inner container shell. Polystyrene foam is less expensive and can be considered as a alternative material.

[0040] The specific implementation process of this embodiment is as follows:

[0041] Align and insert the slide rail 26 on the connecting block 25 into the long slide bar 24. The installation of the vacuum plate 28 is completed by sliding the T-shaped slide rail 26 on the connecting block 25 and the T-shaped structure of the long slide bar 24 to match each other and slide into the connection. When removing the vacuum plate 28, place your hands on the handles 27 on both sides and apply force to remove the vacuum plate 28.

[0042] The starter motor 14 drives the bidirectional screw 15 to rotate via the gearbox, which in turn allows the two stabilizing blocks 20 to move smoothly at the same time. Under the action of the bidirectional screw 15, the two stabilizing blocks 20 move inward simultaneously, and the long slide bar 24 drives the vacuum plate 28 to approach the outer wall of the cold box 16.

[0043] The above embodiments are merely exemplary models of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Various modifications or equivalent substitutions can be made to this utility model within its substance and scope of protection. Such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "inner," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the attached circle, or the orientation or positional relationship commonly used when the utility model product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, these terms indicating orientation or positional relationship should not be construed as limitations on this utility model.

[0045] In the description of this utility model, it should be further noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, these terms can refer to a fixed connection, a detachable connection, or an integral connection between components; they can also refer to a mechanical connection or an electrical connection; or they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

Claims

1. A multi-layer insulated liquid nitrogen pump cold box, characterized in that: Includes a support platform (10), a slide rail (11) is provided in the middle of the support platform (10), and L-shaped slide grooves (12) are provided on both sides of the slide rail (11). Side plates (13) are installed on both sides of the support platform (10), and a motor (14) with a gearbox is installed on the side plate (13). A bidirectional screw (15) is installed on the side plate (13), and the bidirectional screw (15) is inside the slide rail (11). The output end of the gearbox of the motor (14) is connected to the bidirectional screw (15). A stabilizing block (20) is fitted inside the slide (11), and a heat insulation component is provided above the stabilizing block (20).

2. The multi-layer insulated liquid nitrogen pump cold box according to claim 1, characterized in that: The stabilizer block (20) has a slider (21) with a threaded hole in the middle below it. The slider (21) has L-shaped limiting blocks (22) on both sides. The slider (21) is fitted in the slide rail (11), and the limiting blocks (22) are fitted in the slide groove (12).

3. The multi-layer insulated liquid nitrogen pump cold box according to claim 2, characterized in that: The thermal insulation component includes a long slide bar (24) and a connecting block (25). The long slide bar (24) is fixed above the center of the stabilizing block (20). The long slide bar (24) has a T-shaped structure. The connecting block (25) has a T-shaped slide rail (26) inside. The connecting block (25) cooperates with the long slide bar (24) through the slide rail (26). A vacuum plate (28) is connected to one side of the connecting block (25).

4. The multi-layer insulated liquid nitrogen pump cold box according to claim 3, characterized in that: The vacuum plate (28) has two symmetrical connecting blocks (25) on its back.

5. A multi-layer insulated liquid nitrogen pump cold box according to claim 4, characterized in that: The two connecting blocks (25) are connected to handles (27) on both sides.

6. The multi-layer insulated liquid nitrogen pump cold box according to claim 4, characterized in that: The vacuum plate (28) has a semi-circular arc structure.

7. The multi-layer insulated liquid nitrogen pump cold box according to claim 3, characterized in that: The bottom of the long slider (24) is provided with a bottom block (23).

8. A multi-layer insulated liquid nitrogen pump cold box according to claim 6, characterized in that: The vacuum plate (28) is provided with foam filling material (29) on its inner side.

9. A multi-layer insulated liquid nitrogen pump cold box according to claim 8, characterized in that: The foam filling material (29) is polyurethane foam or polystyrene foam.

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