Detachable frozen soil landfill heat preservation box

Abstract

The utility model provides a detachable frozen soil landfill heat preservation box, which relates to the technical field of heat preservation boxes and comprises a heat preservation box, and a detachable box door is arranged at a top opening of the heat preservation box. The step-shaped sealing strip is arranged at the edge of the detachable box door and is clamped with a step-shaped sealing groove formed in the opening of the heat preservation box to form a multi-stage sealing interface, and the step-shaped sealing strip sequentially comprises a hard rubber convex edge, a hard rubber convex edge and a sealing strip in the closing direction, and the hard rubber convex edge is in extrusion contact with the side wall of the sealing groove in the initial closing stage of the detachable box door to form rigid sealing; the elastic foaming rubber cavity is internally provided with through micropores, and when the detachable box door is completely closed, the elastic foaming rubber cavity absorbs vibration energy and temporarily stores the phase-change material overflowed under pressure. The multi-stage sealing structure of the stepped sealing strips is adopted, the sealing pressure can be automatically adjusted when the temperature fluctuates, the temperature in the heat preservation box is made to be stable for a long time, the technical limitation that a traditional heat preservation box depends on static sealing is overcome, and unification of a detachable structure and long-acting heat preservation performance is achieved.

Description

Technical Field

[0001] This utility model relates to the field of insulation box technology, and in particular to a detachable permafrost landfill insulation box. Background Technology

[0002] Frozen soil landfill insulated boxes are widely used in cold region engineering, biological sample storage, cold chain transportation and other fields. Their main function is to maintain the stability of frozen soil in low temperature environment for a long time and prevent temperature fluctuations from causing frozen soil to melt or structural damage.

[0003] However, most existing insulated boxes adopt an integrated sealed design, with the box body and door fixed by welding or high-strength adhesive. This makes the box body impossible to disassemble or can only be replaced as a whole. In addition, insulated boxes rely on static compression sealing, which is prone to material hardening and elastic failure in long-term low-temperature environments, resulting in increased sealing gaps. Therefore, it is impossible to achieve a combination of detachable structure and long-term insulation. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a detachable frozen soil landfill insulation box, which solves the technical problem of the inability to unify detachable structure with long-term insulation performance.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a detachable frozen soil landfill insulation box, comprising:

[0006] The insulated box has a removable door at the top opening;

[0007] A stepped sealing strip is installed at the edge of the removable door and engages with a stepped sealing groove at the opening of the insulated box to form a multi-level sealing interface. The stepped sealing strip includes, in sequence along the closing direction:

[0008] The rigid rubber protrusions form a rigid seal by pressing against the side wall of the sealing groove during the initial closing of the detachable door.

[0009] The elastic foamed rubber cavity has through-holes inside, which absorbs vibration energy and temporarily stores the phase change material that overflows under pressure when the detachable door is fully closed.

[0010] The stepped interlocking groove is filled with phase change material. When the temperature of the frozen soil fluctuates, the phase change material inside expands or contracts, automatically filling or releasing the sealing gap.

[0011] When the insulated box is filled with frozen soil and the detachable door is closed, the stepped sealing strip forms a dynamically balanced labyrinthine airtight path within the stepped sealing groove.

[0012] Preferably, the cross-section of the hard rubber protrusion is a trapezoid with a cross-section of 55°±5°, a Shore hardness of A70±5, and a compression set of ≤15% at -40℃.

[0013] Preferably, the micropores in the elastic foamed rubber cavity are arranged in an Archimedean spiral, with the axis of each micropore forming an angle of 30°-45° with the length direction of the stepped sealing strip. The pore diameter is 0.5mm-1.0mm and gradually decreases along the spiral direction. The compression rebound rate is ≥90% at -30℃ and the tensile strength is ≥1.5MPa.

[0014] Preferably, the stepped fitting groove is provided with a multi-level stepped structure, the height difference of each step is 3.0mm-7.0mm and they are evenly distributed, and the phase change material filled in it is a paraffin-based composite material.

[0015] Preferably, the inner wall of the stepped sealing groove is provided with a heat-insulating coating with a thickness of 0.2mm-0.5mm, and forms a heat-barrier interface with the stepped sealing strip.

[0016] By employing the above technical solution, this utility model provides a detachable frozen soil landfill insulation box, which has at least the following beneficial effects:

[0017] This invention adopts a multi-stage sealing structure with stepped sealing strips, which can automatically adjust the sealing pressure when the temperature fluctuates, so that the temperature inside the insulation box is stable for a long time. It solves the technical limitations of traditional insulation boxes that rely on static sealing, and achieves the unity of detachable structure and long-term insulation performance. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a partial structural schematic diagram of the present invention;

[0021] Figure 3 This is a partial cross-sectional view of the present invention.

[0022] In the diagram: 1. Insulated box; 2. Detachable door; 3. Stepped sealing strip; 31. Hard rubber protrusion; 32. Elastic foamed rubber cavity; 33. Stepped fitting groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to Figures 1-3 This embodiment proposes a detachable frozen soil landfill insulation box, including:

[0025] The insulated box 1 has a detachable door 2 at its top opening;

[0026] A stepped sealing strip 3 is disposed at the edge of the removable door 2 and engages with the stepped sealing groove 11 at the opening of the insulated box 1 to form a multi-level sealing interface. The inner wall of the stepped sealing groove 11 is provided with a heat-insulating coating with a thickness of 0.2mm-0.5mm, which forms a heat-barrier interface with the stepped sealing strip 3. The stepped sealing strip 3 includes, in sequence along the closing direction:

[0027] The hard rubber protrusion 31 has a cross-section of 55°±5° trapezoid, a Shore hardness of A70±5, and a compression set of ≤15% at -40℃. It forms a rigid seal by squeezing into the side wall of the sealing groove 4 during the initial closing of the detachable door 2.

[0028] The elastic foamed rubber cavity 32 has through-holes inside. The through-holes inside the elastic foamed rubber cavity 32 are arranged in an Archimedean spiral. The axis of each microhole forms an angle of 30°-45° with the length direction of the stepped sealing strip 3. The pore diameter is 0.5mm-1.0mm and gradually decreases along the spiral direction. The compression rebound rate is ≥90% in an environment of -30℃ and the tensile strength is ≥1.5MPa. When the detachable box door 2 is fully closed, it absorbs vibration energy and temporarily stores the phase change material that overflows under pressure.

[0029] The stepped interlocking groove 33 is filled with phase change material. The stepped interlocking groove 33 has a multi-level stepped structure. The height difference between each step is 3.0mm-7.0mm and they are evenly distributed. The phase change material filled in it is a paraffin-based composite material. When the temperature of the frozen soil fluctuates, the phase change material inside it expands or contracts, automatically filling or releasing the sealing gap.

[0030] When the insulated box 1 is filled with frozen soil and the removable box door 2 is closed, the stepped sealing strip 3 forms a dynamically balanced labyrinthine airtight path in the stepped sealing groove 11.

[0031] In the initial mechanical seal stage (initial closure of the detachable door 2), the hard rubber protrusion 31 first contacts the side wall of the stepped sealing groove 11 with a 55° inclined surface. Through the geometric features of the trapezoidal cross section, the top 3mm-5mm sealing edge generates line contact pressure, and the bottom 8mm-10mm base provides supporting reaction force, forming the first-level rigid sealing barrier, which can block more than 80% of gas convection heat transfer.

[0032] In the elastic buffer energy storage stage (with the detachable door 2 fully closed), the elastic foamed rubber cavity 32 applies a locking torque of 12-15 N·m between the insulated box 1 and the detachable door 2 (not shown in the figure, but it has a closing and locking effect). Under this action, the spiral microporous structure has a compression deformation rate of 35-40%, temporarily storing phase change materials. It also achieves vector decomposition of vibration energy through a microporous tilt angle of 30°-45°. This stage can absorb more than 90% of the mechanical impact energy.

[0033] During the thermodynamic adaptive stage (when the temperature fluctuates), the phase change material in the stepped interlocking groove 33 undergoes a phase change. When the temperature is > -25℃, the material melts into a liquid state and expands in volume by 8-12% to fill the gap. When the temperature is < -28℃, the material solidifies and shrinks, releasing a safety gap of 0.1mm-0.3mm. The labyrinthine air passage formed by the multi-level stepped structure extends the cold air infiltration path by 5-7 times.

[0034] During the dynamic equilibrium maintenance phase (steady-state operation), the seal is maintained through a triple collaborative feedback mechanism. The first is mechanical feedback, where the hard rubber protrusion 31 limits the maximum deformation to ≤0.5mm. The second is material feedback, where the volume change rate of the phase change material compensates for gap fluctuations. The third is thermal feedback, where the inner wall of the stepped sealing groove 11 is provided with a heat insulation coating with a thermal conductivity of ≤0.05W / (m·K) and a coating thickness of 0.2mm-0.5mm, forming a thermal barrier interface with the stepped sealing strip 3, blocking more than 60% of radiative heat transfer.

[0035] Based on the above, the limitations of the traditional "static sealing" of insulated boxes have been overcome. Through the synergistic effect of mechanics, materials, and heat, a unified detachable structure and long-term insulation have been achieved.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A detachable frozen soil landfill insulation box, characterized in that, include: An insulated box (1) has a detachable door (2) at its top opening; A stepped sealing strip (3) is provided at the edge of the detachable door (2) and engages with the stepped sealing groove (11) at the opening of the insulated box (1) to form a multi-level sealing interface. The stepped sealing strip (3) includes the following components in sequence along the closing direction: The hard rubber protrusion (31) forms a rigid seal by squeezing into the side wall of the sealing groove (4) during the initial closing of the detachable door (2); The elastic foamed rubber cavity (32) has through micropores inside, which absorb vibration energy and temporarily store the phase change material that overflows under pressure when the detachable box door (2) is fully closed. The stepped interlocking groove (33) is filled with phase change material. When the temperature of the frozen soil fluctuates, the phase change material inside expands or contracts, automatically filling or releasing the sealing gap. When the insulated box (1) is filled with frozen soil and the detachable box door (2) is closed, the stepped sealing strip (3) forms a dynamically balanced labyrinthine airtight path in the stepped sealing groove (11).

2. The detachable frozen soil landfill insulation box according to claim 1, characterized in that, The cross section of the hard rubber protrusion (31) is a trapezoid with a cross section of 55°±5°, a Shore hardness of A70±5, and a compression set of ≤15% at -40℃.

3. The detachable frozen soil landfill insulation box according to claim 1, characterized in that, The elastic foamed rubber cavity (32) has through micropores arranged in an Archimedean spiral. The axis of each micropore forms an angle of 30°-45° with the length direction of the stepped sealing strip (3). The pore diameter is 0.5mm-1.0mm and gradually shrinks along the spiral direction. The compression rebound rate is ≥90% in an environment of -30℃ and the tensile strength is ≥1.5MPa.

4. The detachable frozen soil landfill insulation box according to claim 1, characterized in that, The stepped interlocking groove (33) is provided with a multi-level stepped structure, with the height difference between each step being 3.0mm-7.0mm and distributed in an equal manner. The phase change material filled in it is a paraffin-based composite material.

5. The detachable frozen soil landfill insulation box according to claim 1, characterized in that, The inner wall of the stepped sealing groove (11) is provided with a heat insulation coating with a thickness of 0.2mm-0.5mm, and forms a heat barrier interface with the stepped sealing strip (3).

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