Polyurethane sandwich panel for cold stores

Abstract

The utility model relates to a kind of polyurethane sandwich panels for cold storage, belong to the technical field of polyurethane sandwich panels, including sandwich layer and the surface layer being set to the both sides of sandwich layer, it is characterized in that, still including the glass fibre layer being covered on sandwich layer, surface layer is divided into first surface layer and second surface layer, the both ends of glass fibre layer are located between first surface layer and sandwich layer, connecting column is arranged on sandwich layer and penetrates, connecting column and corresponding surface layer are fixed by connecting piece.The application has the effect of improving the strength of polyurethane sandwich panel.

Description

Technical Field

[0001] This utility model relates to the technical field of polyurethane sandwich panels, and in particular to a polyurethane sandwich panel for cold storage. Background Technology

[0002] Polyurethane sandwich panels are a type of composite material with bimetallic, single-metallic, or non-metallic surfaces, using rigid polyurethane foam as the insulation layer. They are lightweight, high-strength, heat-insulating, and have excellent performance. They also have good sealing properties, which can effectively prevent the intrusion of condensate. They are commonly used in the construction of cold storage partitions, and their modular installation method can shorten the construction cycle.

[0003] Polyurethane sandwich panels include a core layer and surface layers disposed on both sides of the core layer. In the prior art, in order to improve the thermal insulation performance of polyurethane sandwich panels, most of them choose to increase the thickness of the core layer. However, in the actual transportation and handling process, it has been found that polyurethane sandwich panels with thicker core layers are more prone to cracking or breakage. Utility Model Content

[0004] To improve the strength of polyurethane sandwich panels, this application provides a polyurethane sandwich panel for cold storage.

[0005] This application provides a polyurethane sandwich panel for cold storage, which adopts the following technical solution: A polyurethane sandwich panel for cold storage includes a core layer and surface layers disposed on both sides of the core layer, and also includes a glass fiber layer covering the core layer. The surface layer is divided into a first surface layer and a second surface layer. Both ends of the glass fiber layer are located between the first surface layer and the core layer. A connecting post is provided through the core layer, and the connecting post is fixed to the corresponding surface layer by a connector.

[0006] By adopting the above technical solution, the glass fiber layer has high mechanical strength and is suitable as a structural reinforcement material, which effectively improves the strength of the obtained polyurethane sandwich panel. It also has good stability, is not easy to age, and has a long service life. Both ends of the glass fiber layer are located between the first surface layer and the sandwich layer, making it difficult for the glass fiber layer to detach from the sandwich layer, thereby effectively improving the reliability of the glass fiber layer fixed on the sandwich layer.

[0007] Preferably, the first surface layer has a reinforcing portion on the side facing the core layer, the reinforcing portion including multiple reinforcing ribs arranged in an alternating manner, and the end of the glass fiber layer is attached to the side wall of the reinforcing portion.

[0008] By adopting the above technical solution and by setting up the reinforcement, the strength of the first surface layer is improved to a certain extent, making it less likely for the polyurethane sandwich panel to break in the middle during transportation. The design of the reinforcement layer also fills the gap between the first surface layer and the sandwich layer caused by the glass fiber layer, ensuring the integrity of the polyurethane sandwich panel.

[0009] Preferably, two plug-in blocks are provided on one side of the sandwich layer, and the two plug-in blocks are arranged along the thickness direction of the sandwich layer. A mating block is provided on the other side of the sandwich layer, and a corresponding plug-in groove is provided on the mating block for the plug-in blocks to fit into.

[0010] By adopting the above technical solution, the strength and tightness of the connection are increased during the connection of the two polyurethane sandwich panels through the cooperation of the two plug-in blocks and mating blocks, which to a certain extent prevents external impurities from entering between the polyurethane sandwich panel and the carrier.

[0011] Preferably, a sealing strip is embedded on the inner wall of the insertion slot.

[0012] By adopting the above technical solution, the sealing strip further enhances the tightness of the connection between the two polyurethane sandwich panels.

[0013] Preferably, the surface layer has connecting spikes on the side facing the core layer.

[0014] By adopting the above technical solution, during the adhesive bonding process between the surface layer and the core layer, the connecting spikes on the surface layer can penetrate the glass limiting layer and embed into the core layer under pressure, thereby improving the tightness of the connection between the surface layer and the core layer and reducing the gap between the surface layer and the core layer.

[0015] Preferably, the connector is a self-tapping screw.

[0016] By adopting the above technical solution, the surface layer is first fixed to the core layer by adhesive bonding, and then further fixed by self-tapping screws, which effectively improves the reliability of the fixation between the surface layer and the core layer.

[0017] Preferably, the surface layer is provided with a self-tapping countersunk hole that mates with the head of a self-tapping screw.

[0018] By adopting the above technical solution, the surface of the polyurethane sandwich panel is less likely to have protruding self-tapping screw heads, thus increasing the overall aesthetics.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. The glass fiber layer has high mechanical strength, making it suitable as a structural reinforcement material. It effectively improves the strength of the resulting polyurethane sandwich panel, and it has good stability, is not easy to age, and has a long service life. 2. By setting up the reinforcement, the strength of the first surface layer is improved to a certain extent, making the polyurethane sandwich panel less likely to break in the middle during transportation. The design of the reinforcement layer also fills the gap between the first surface layer and the sandwich layer caused by the glass fiber layer, ensuring the integrity of the manufactured polyurethane sandwich panel. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of a polyurethane sandwich panel according to an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of the first surface structure in an embodiment of this application.

[0022] Figure 3 yes Figure 1 Enlarged view of section A.

[0023] Explanation of reference numerals in the attached drawings: 1. Sandwich layer; 2. Surface layer; 21. First surface layer; 211. Reinforcing part; 22. Second surface layer; 3. Fiberglass layer; 4. Connecting post; 41. Self-tapping screw; 5. Connecting spike; 6. Insertion block; 7. Mating block; 71. Insertion groove; 72. Sealing strip. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-3 The present invention will be described in further detail below.

[0025] This application discloses a polyurethane sandwich panel for cold storage, as shown in the embodiments below. Figure 1 The sandwich panel includes a core layer 1 and surface layers 2 disposed on both sides of the core layer 1. In this embodiment, the core layer 1 is a rigid polyurethane foam, which is mostly a closed-cell structure and has excellent properties such as good thermal insulation, light weight, sound insulation, shock absorption, heat resistance, and cold resistance. The surface layer 2 is a fiberglass plate, which has the characteristics of corrosion resistance and strong weather resistance, thus ensuring the service life of the polyurethane sandwich panel to a certain extent.

[0026] Reference Figure 1 It also includes a glass fiber layer 3 covering the core layer 1. The glass fiber layer 3 has high mechanical strength, making it suitable as a structural reinforcement material, effectively improving the strength of the resulting polyurethane sandwich panel. It also exhibits good stability, is not prone to aging, and has a long service life. The surface layer 2 is divided into a first surface layer 21 and a second surface layer 22. Both ends of the glass fiber layer 3 are located between the first surface layer 21 and the core layer 1, making it less likely for the glass fiber layer 3 to detach from the core layer 1, thereby effectively improving the reliability of the glass fiber layer 3 fixed to the core layer 1.

[0027] Reference Figure 1 and Figure 3A connecting post 4 is provided through the core layer 1. The connecting post 4 is fixed to the corresponding surface layer 2 by a connector. In this embodiment, the connector is a self-tapping screw. The surface layer 2 has a through hole corresponding to the connecting post 4. The connecting post 4 is made of a rigid material and there are multiple connecting posts 4. The surface layer 2 is first fixed to the core layer 1 by adhesive bonding, and then further fixed by self-tapping screws 41, which effectively improves the reliability of the fixation between the surface layer 2 and the core layer 1. The surface layer 2 has a self-tapping countersunk hole that mates with the screw head of the self-tapping screw 41, so that there are no protruding screw heads of the self-tapping screw 41 on the surface of the polyurethane sandwich panel, increasing the overall aesthetics.

[0028] Reference Figure 1 The surface layer 2 has connecting spikes 5 on the side facing the core layer 1. During the adhesive bonding process between the surface layer 2 and the core layer 1, the connecting spikes 5 on the surface layer 2 can penetrate the glass limiting layer and embed into the core layer 1 under pressure, thereby improving the tightness of the connection between the surface layer 2 and the core layer 1 and reducing the gap between the surface layer 2 and the core layer 1.

[0029] Reference Figure 1 and Figure 2 The first surface layer 21 has a reinforcing part 211 on the side facing the core layer 1. The reinforcing part 211 includes multiple reinforcing ribs arranged in an alternating manner. The reinforcement part 211 improves the strength of the first surface layer 21 to a certain extent, making the polyurethane sandwich panel less likely to break in the middle during transportation. The end of the glass fiber layer 3 is attached to the side wall of the reinforcing part 211. The design of the reinforcing layer also fills the gap between the first surface layer 21 and the core layer 1 caused by the glass fiber layer 3, ensuring the integrity of the polyurethane sandwich panel.

[0030] Reference Figure 1 Two insertion blocks 6 are provided on one side of the sandwich layer 1, arranged along the thickness direction of the sandwich layer 1. A mating block 7 is provided on the other side of the sandwich layer 1, with corresponding insertion grooves 71 for the insertion blocks 6 to fit into. Through the engagement of the two insertion blocks 6 and the mating block 7, the strength and tightness of the connection are increased during the connection of the two polyurethane sandwich panels, preventing external impurities from entering between the polyurethane sandwich panel and the carrier to a certain extent. A sealing strip 72 is embedded in the inner wall of the insertion groove 71, further enhancing the tightness of the connection between the two polyurethane sandwich panels.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A polyurethane sandwich panel for cold storage, comprising a core layer (1) and surface layers (2) disposed on both sides of the core layer (1), characterized in that, It also includes a glass fiber layer (3) covering the core layer (1). The surface layer (2) is divided into a first surface layer (21) and a second surface layer (22). Both ends of the glass fiber layer (3) are located between the first surface layer (21) and the core layer (1). A connecting post (4) is provided through the core layer (1). The connecting post (4) is fixed to the corresponding surface layer (2) by a connector.

2. The polyurethane sandwich panel for cold storage according to claim 1, characterized in that, The first surface layer (21) has a reinforcing part (211) on the side facing the core layer (1). The reinforcing part (211) includes multiple reinforcing ribs arranged in an alternating manner. The end of the glass fiber layer (3) is attached to the side wall of the reinforcing part (211).

3. The polyurethane sandwich panel for cold storage according to claim 1, characterized in that, Two plug-in blocks (6) are provided on one side of the sandwich layer (1), and the two plug-in blocks (6) are arranged along the thickness direction of the sandwich layer (1). A mating block (7) is provided on the other side of the sandwich layer (1), and a plug-in groove (71) is correspondingly opened on the mating block (7) for the plug-in block (6) to fit.

4. The polyurethane sandwich panel for cold storage according to claim 3, characterized in that, A sealing strip (72) is embedded on the inner wall of the insertion groove (71).

5. The polyurethane sandwich panel for cold storage according to claim 1, characterized in that, The surface layer (2) is provided with connecting spikes (5) on the side facing the core layer (1).

6. The polyurethane sandwich panel for cold storage according to claim 1, characterized in that, The connector is a self-tapping screw (41).

7. The polyurethane sandwich panel for cold storage according to claim 6, characterized in that, The surface layer (2) is provided with a self-tapping countersunk hole that mates with the screw head of the self-tapping screw (41).

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