Double-layer sealing cold bridge structure and rock wool access door

Abstract

This utility model discloses a double-layer sealed cold-break bridge structure and a rock wool maintenance door, belonging to the technical field of thermal insulation devices. The double-layer sealed cold-break bridge structure includes matching door panel lining strips and box panel lining strips; the door panel lining strips have a two-section stepped structure, and the box panel lining strips have a three-section stepped structure; both the two-section stepped structure of the door panel lining strips and the three-section stepped structure of the box panel lining strips have adhesive strips on both contact surfaces. The rock wool maintenance door includes the aforementioned double-layer sealed cold-break bridge structure and a door leaf, the door leaf being filled with rock wool; thin metal plates are provided on both the inner and outer sides of the door leaf, and the thin plates are snapped into place with the door panel lining strips. The double-layer sealed cold-break bridge structure provided by this utility model, by adding adhesive strips between the two lining strips, and in conjunction with the novel structure of the door panel lining strips and box panel lining strips, enables the door leaf and the equipment compartment wall to lock together without the need for rivet reinforcement, ensuring excellent thermal insulation.

Description

Technical Field

[0001] This utility model belongs to the technical field of thermal insulation devices, specifically relating to a double-layer sealed cold bridge structure and a rock wool inspection door. Background Technology

[0002] Current sealing structures for rock wool inspection doors mainly include sealing strips, smoke-proof strips, and door frame seals. Sealing strip seals achieve a seal by placing a sealing strip between the door frame and the door panel, utilizing the strip's elasticity to fill the gap. Smoke-proof strip seals involve attaching expandable smoke-proof strips around the door frame; these expand when heated and seal the gaps. Door frame seals reduce gaps by pressing the door frame against the edge of the door panel. However, each of these sealing structures has its drawbacks, such as susceptibility to wear and deformation from repeated opening and closing, leading to decreased sealing effectiveness, and requiring high precision during installation, making installation difficult. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a double-layer sealed cold bridge structure with good sealing effect and durability, and a rock wool maintenance door with the double-layer sealed cold bridge structure.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a double-layer sealed cold bridge structure, including matching door panel lining strips and box panel lining strips; the door panel lining strips are two-section stepped structures, and the box panel lining strips are three-section stepped structures; the two-section stepped structure of the door panel lining strips and the three-section stepped structure of the box panel lining strips are provided with adhesive strips on both contact surfaces.

[0005] Furthermore, both the door panel lining strip and the box panel lining strip are made of PVC.

[0006] Furthermore, the door panel lining strip includes a first step portion and a second step portion; the first step portion has a first step surface; the second step portion has a second step surface; both the first step surface and the second step surface are provided with limiting ribs.

[0007] Furthermore, the end of the first step portion that is not connected to the second step portion has a first snap-fit ​​groove; the end of the second step portion that is not connected to the first step portion has a second snap-fit ​​groove with an inverted V-shaped cross-section.

[0008] Furthermore, the first stepped portion has at least two cavities.

[0009] Furthermore, it also includes metal door panel reinforcing ribs.

[0010] Furthermore, the panel lining strip includes a first-level stepped section, a second-level stepped section, and a third-level stepped section; the first-level stepped section has a first-level stepped surface, the second-level stepped section has a second-level stepped surface, and the third-level stepped section has a third-level stepped surface; the first-level stepped surface and the second-level stepped surface are provided with protrusions that contact the adhesive strip.

[0011] Furthermore, the panel liner has at least three cavities.

[0012] Furthermore, the box panel lining strip is provided with at least two box panel reinforcing ribs.

[0013] Another technical solution adopted by this utility model is: a rock wool inspection door, including any of the above-mentioned double-layer sealed cold bridge structure and door leaf, wherein the door leaf is filled with rock wool; thin metal plates are provided on both the inner and outer sides of the door leaf, and the thin plates are snapped together with the door panel lining strip.

[0014] The beneficial effects of this utility model are as follows: The double-layer sealed cold bridge structure provided by this utility model adds a rubber strip between the two lining strips. The rubber strip has good elasticity and can effectively block heat transfer and gas leakage between the inside and outside of the door panel. With the new structure of the door panel lining strip and the box panel lining strip, the door leaf and the equipment compartment wall can be locked together without the need for rivet reinforcement, ensuring good heat insulation effect and reducing heat exchange between the inside of the equipment and the outside. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the door panel liner according to a specific embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the box panel liner of a specific embodiment of the present utility model;

[0017] Figure 3 This is a partial structural diagram illustrating the cooperation between the door panel liner and the door leaf in a specific embodiment of this utility model.

[0018] Figure 4 This is a partial structural diagram illustrating the cooperation between the rock wool inspection door and the equipment compartment wall in a specific embodiment of this utility model.

[0019] Label Explanation:

[0020] 1. Door panel backing strip; 11. First step surface; 12. Second step surface; 13. Limiting rib; 14. First locking groove; 15. Second locking groove;

[0021] 2. Box panel lining strip; 21. First-level stepped surface; 22. Second-level stepped surface; 23. Third-level stepped surface; 24. Protrusion; 25. Rib;

[0022] 3. Rubber strip; 4. Door leaf; 5. Equipment bulkhead; 51. Cold plate; 52. Connecting strip; 6. Cavity; 7. Door panel reinforcing rib; 8. Box panel reinforcing rib; 9. Thin plate. Detailed Implementation

[0023] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] Please refer to Figures 1 to 4 A double-layer sealed thermal bridge structure includes matching door panel strips and box panel strips. The door panel strips have a two-section stepped structure, and the box panel strips have a three-section stepped structure. Both the two-section stepped structure of the door panel strips and the three-section stepped structure of the box panel strips have adhesive strips on their two contact surfaces. The adhesive strips can be polyurethane foam strips, applied via dotting, and have a semi-circular cross-section. Both the door panel strips and the box panel strips are strip-shaped structures. Figures 1-4 The image shows the cross-sections of both.

[0025] As described above, the beneficial effects of this utility model are as follows: The double-layer sealed cold-break bridge structure provided by this utility model adds a rubber strip between the two lining strips. The rubber strip has more standardized dimensions, smaller installation errors, and better elasticity, effectively blocking heat transfer and gas leakage between the inside and outside of the door panel. The door panel lining strip and box panel lining strip structure provided by this utility model are interlocked with the door leaf and equipment compartment wall, eliminating the need for rivet reinforcement and ensuring that there is no direct metal contact between the inner and outer panels at any position of the door panel, thus guaranteeing good heat insulation. Compared with traditional sealing structures, the double-layer sealed cold-break bridge structure provided by this utility model is wear-resistant and less prone to deformation during use. The door panel lining strip and box panel lining strip can be used with the door leaf and equipment compartment wall respectively, simultaneously improving the heat insulation and sealing effect at the contact points.

[0026] In one or more embodiments, both the door panel lining strip and the box panel lining strip are made of PVC. PVC has a low thermal conductivity, which effectively reduces heat transfer and maintains a stable internal temperature, thereby achieving good insulation. Furthermore, its low density reduces the overall load, and it possesses excellent corrosion resistance and waterproof properties. During the manufacturing process, virgin PVC raw materials are preferred for preparing the door panel lining strip and box panel lining strip, rather than recycled materials.

[0027] In one or more embodiments, the door panel liner includes a first stepped portion and a second stepped portion; the first stepped portion has a first stepped surface; the second stepped portion has a second stepped surface; both the first stepped surface and the second stepped surface are provided with limiting ribs, which are used to limit the position of the rubber strip. The setting of the limiting ribs can make the installation error of the rubber strip smaller and the size more standardized.

[0028] In one or more embodiments, the end of the first step portion not connected to the second step portion has a first snap-fit ​​groove; the end of the second step portion not connected to the first step portion has a second snap-fit ​​groove with an inverted V-shaped cross-section. The first snap-fit ​​groove and the second snap-fit ​​groove are used to connect the door panel liner to the door leaf.

[0029] In one or more embodiments, the first step has at least two cavities. The cavities significantly increase thermal resistance by reducing heat conduction, convection, and radiation heat transfer, effectively reducing heat transfer efficiency and thus improving the thermal insulation performance of the door panel lining.

[0030] In one or more embodiments, the door panel also includes metal reinforcing ribs. By providing door panel reinforcing ribs, the strength of the plastic door panel ribs is increased, preventing deformation or damage that may occur during long-term use.

[0031] In one or more embodiments, the door panel reinforcing ribs are partially or entirely disposed between the two cavities. In one or more embodiments, reference... Figure 3 and 4 The door panel reinforcing rib is a right-angled U-shaped bent angle iron with one end longer than the other. The reinforcing rib is positioned near the outer side of the door leaf, playing a crucial role in preventing damage.

[0032] In one or more embodiments, the panel liner includes a primary stepped portion, a secondary stepped portion, and a tertiary stepped portion; the primary stepped portion has a primary stepped surface, the secondary stepped portion has a secondary stepped surface, and the tertiary stepped portion has a tertiary stepped surface; the primary and secondary stepped surfaces are provided with protrusions that contact the adhesive strip. The primary stepped surface, together with the first stepped surface and an adhesive strip, forms a primary sealing structure; the secondary stepped surface, together with the second stepped surface and another adhesive strip, forms a secondary sealing structure. Compared to the sealing structure formed by the primary stepped surface and the first stepped surface, the sealing structure provided by this invention has a better sealing effect. In one or more embodiments, at least two protrusions are provided on one stepped surface, which helps to further improve the sealing performance.

[0033] In one or more embodiments, the panel liner has at least three cavities. That is, each step has at least one cavity. In one or more embodiments, refer to Figure 2 The box panel lining strip has six cavities: one cavity is located in the first-level step, one in the third-level step, two in the second-level step, and two more partially located in the first-level step and partially located in the second-level step.

[0034] In one or more embodiments, at least two reinforcing ribs are provided within the panel liner. The reinforcing ribs are preferably made of metal or other high-strength materials, serving to strengthen the panel liner. In one or more embodiments, the reinforcing ribs are disposed within a cavity. In one or more embodiments, reference... Figure 4 Two reinforcing ribs for the box panel are set in two different cavities.

[0035] Please refer to Figure 1 as well as Figure 2 A rock wool inspection door includes any of the aforementioned double-layer sealed cold-break bridge structures and a door leaf. The door leaf is filled with rock wool, with a filling density of 80±5 kg / m³, compressive strength ≥180 kPa, and flexural strength ≥460 kPa. Thin metal plates (sheet metal) are provided on both the inner and outer surfaces of the door leaf, and these plates are snapped into the door panel lining strips. The lining strips are snapped into the equipment compartment walls of the equipment (such as air handling units or heat exchangers). The equipment compartment walls, located at the door leaf installation point, also have thin metal plates and snapping strips on their inner and outer surfaces. The inner side of the equipment compartment wall has a cold-rolled steel plate, and the outer side has snapping strips. A three-tiered stepped section snaps into the grooves of the snapping strips. The first-tiered section has ribs protruding towards the cold-rolled plate. The cold-rolled plate and ribs are tightly fitted together by a sealing strip, such as a 2mm thick sealing strip, and fixed with screws. This fit further forms a cavity, providing thermal insulation. An observation window is located in the middle of the door leaf.

[0036] Please refer to Figure 1 , 2 4. Embodiment 1 of this utility model is as follows:

[0037] A double-layer sealed cold bridge structure includes matching door panel lining strip 1 and box panel lining strip 2; both door panel lining strip 1 and box panel lining strip 2 are made of PVC; the two-section stepped structure of door panel lining strip 1 and the three-section stepped structure of box panel lining strip 2 are provided with adhesive strips 3 on both contact surfaces.

[0038] The door panel lining strip 1 has a two-stage stepped structure, specifically including a first stepped section and a second stepped section; the first stepped section has a first stepped surface 11; the second stepped section has a second stepped surface 12; both the first stepped surface 11 and the second stepped surface 12 are provided with limiting ribs 13, which are used to limit the rubber strip 3; the end of the first stepped section that is not connected to the second stepped section has a first locking groove 14; the end of the second stepped section that is not connected to the first stepped section has a second locking groove 15 with an inverted V-shaped cross section;

[0039] The box panel lining strip 2 has a three-section stepped structure, specifically including a first-level stepped section, a second-level stepped section and a third-level stepped section; the first-level stepped section has a first-level stepped surface 21, the second-level stepped section has a second-level stepped surface 22, and the third-level stepped section has a third-level stepped surface 23; the first-level stepped surface 21 and the second-level stepped surface 22 are provided with protrusions 24 that contact the rubber strip 3.

[0040] Please refer to Figure 1 , 2 4. Embodiment 2 of this utility model is as follows:

[0041] Based on Embodiment 1, the first step has two cavities 6; the box panel liner 2 has six cavities 6, one cavity located in the first step, one cavity located in the third step, two cavities located in the second step, and two cavities partially located in the first step and partially located in the second step.

[0042] Please refer to Figure 1 , 2 4. Embodiment 3 of this utility model is as follows:

[0043] Based on Embodiment 2, it also includes a door panel reinforcing rib 7 and two box panel reinforcing ribs 8;

[0044] The door panel reinforcing rib 7 is a right-angled U-shaped bent angle iron with one end longer than the other. Its short side is set between the two cavities, and its long side is set on the outer periphery of the second step.

[0045] The box panel reinforcing rib 8 is plate-shaped, and the two box panel reinforcing ribs are set in two different cavities of the box panel lining strip.

[0046] Please refer to Figures 1-4 Embodiment four of this utility model is as follows:

[0047] A rock wool inspection door includes a double-layer sealed cold-break bridge structure as described in Embodiment 1, Embodiment 2, or Embodiment 3, and a door leaf 4. The door leaf 4 is filled with rock wool, and the rock wool filling density in the door leaf 4 is 80±5kg / m³; the compressive strength is ≥180kPa; and the bending strength is ≥460kPa. The inner and outer sides of the door leaf 4 are respectively provided with an inner panel and an outer panel (thin metal plate 9). The inner panel is made of aluminum-zinc plate with a thickness of 0.8mm, and the outer panel is made of martensitic steel plate with a thickness of 0.7mm. The inner and outer panels are snapped together with the door panel lining strip. The end of the inner panel has an outwardly bent right-angle bend that is snapped into a first snap-fit ​​groove 14, and the end of the outer panel has a V-shaped bend that is snapped into a second snap-fit ​​groove 15. An observation window is provided in the middle of the door leaf 4.

[0048] The equipment compartment wall is also equipped with cold plates and snap-fit ​​strips on both the inner and outer sides at the door installation location. The inner side of the equipment compartment wall is equipped with a cold plate 51, and the outer side is equipped with a snap-fit ​​strip 52. The three-stage stepped part snaps into the groove of the snap-fit ​​strip 52. The first-stage stepped part has a rib 25 protruding towards the cold plate 51. The cold plate 51 and the rib 25 are tightly fitted together by a 2mm thick sealing strip and fixed by screws.

[0049] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A double-layer sealed cold bridge structure, characterized in that, It includes matching door panel liners and box panel liners; the door panel liners have a two-section stepped structure and the box panel liners have a three-section stepped structure; the two-section stepped structure of the door panel liners and the three-section stepped structure of the box panel liners are provided with adhesive strips on both contact surfaces.

2. The double-layer sealed cold bridge structure according to claim 1, characterized in that, Both the door panel lining strip and the box panel lining strip are made of PVC.

3. The double-layer sealed cold bridge structure according to claim 1, characterized in that, The door panel lining strip includes a first step portion and a second step portion; the first step portion has a first step surface; the second step portion has a second step surface; both the first step surface and the second step surface are provided with limiting ribs.

4. The double-layer sealed cold bridge structure according to claim 3, characterized in that, The end of the first stepped portion that is not connected to the second stepped portion has a first snap-fit ​​groove; the end of the second stepped portion that is not connected to the first stepped portion has a second snap-fit ​​groove with an inverted V-shaped cross-section.

5. The double-layer sealed cold bridge structure according to claim 3, characterized in that, The first stepped section has at least two cavities.

6. The double-layer sealed cold bridge structure according to claim 3, characterized in that, It also includes metal door panel reinforcing ribs.

7. The double-layer sealed cold bridge structure according to claim 3, characterized in that, The box panel lining strip includes a first-level stepped section, a second-level stepped section, and a third-level stepped section; the first-level stepped section has a first-level stepped surface, the second-level stepped section has a second-level stepped surface, and the third-level stepped section has a third-level stepped surface; the first-level stepped surface and the second-level stepped surface are provided with protrusions that contact the rubber strip.

8. The double-layer sealed cold bridge structure according to claim 1 or 7, characterized in that, The box panel lining strip has at least three cavities.

9. The double-layer sealed cooling bridge structure according to claim 1, characterized in that, The box panel lining strip is provided with at least two box panel reinforcing ribs.

10. A rock wool inspection door, characterized in that, The invention includes the double-layer sealed cold bridge structure and door leaf as described in any one of claims 1 to 9, wherein the door leaf is filled with rock wool; both the inner and outer sides of the door leaf are provided with thin metal plates, which are snapped together with the door panel lining strip.

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