Polyurethane sandwich panel with good heat retaining property for refrigeration house

Abstract

The utility model belongs to the technical field of sandwich panel structures, and particularly relates to a polyurethane sandwich panel with good heat preservation for a refrigeration house, which comprises an outer layer, a sandwich layer and an inner layer, two end faces of the sandwich layer are respectively adhered to the outer layer and the inner layer to form a polyurethane sandwich panel main body, and the inner layer is adhered to the outer layer. Buckling pieces with the same height are arranged on one side edge of the polyurethane sandwich panel in the length direction; the sandwich layer consists of a high-density layer, a medium-density layer and a low-density layer; a plurality of rectangular supports are arranged on the outer side of the inner layer at equal intervals in the length direction, an inner layer auxiliary board is installed on the outer sides of the rectangular supports, a clamping piece is arranged on one side edge between the inner layer auxiliary board and the inner layer, and the polyurethane sandwich board has the effect that the overall heat preservation performance of the sandwich board is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sandwich panel structures, and in particular relates to a polyurethane sandwich panel for cold storage with good thermal insulation performance. Background Art

[0002] Polyurethane sandwich panels are mainly composed of the following materials:

[0003] Surface layer: usually made of high-quality galvanized steel sheet (aluminum-zinc coated).

[0004] Middle layer (sandwich layer): Made of flame-retardant hard high-density environmentally friendly polyurethane foam insulation material. This material has excellent thermal insulation properties.

[0005] Bottom layer (back): Moisture-proof, usually a protective layer consisting of heat-insulating, flame-retardant aluminum foil and high-quality steel plate.

[0006] Polyurethane sandwich panels are widely used in cold storage construction. The current existing technical solutions have the following defects:

[0007] 1. At present, the improvement of the thermal insulation of polyurethane sandwich panels generally increases the thickness of the sandwich, but it will increase the floor space of the cold storage, and the overall weight and cost will increase. The defects are more obvious, and the improvement of thermal insulation is limited, which needs to be improved.

[0008] 2. The simple connection methods currently used include sealing through the block structure and slot structure on the edge of the polyurethane sandwich panel, fixed by bolts, and the tightness of the connection needs to be improved. The complex ones include sealing after the connection by adding docking accessories. The former is relatively simple and has a poor sealing effect, while the latter is costly and difficult to install. Utility Model Content

[0009] The utility model aims to provide a polyurethane sandwich panel for cold storage with good thermal insulation performance, so as to solve the technical problems that the thermal insulation performance needs to be improved and the polyurethane sandwich panel docking structure defects.

[0010] In order to solve the above technical problems, the utility model provides a polyurethane sandwich panel for cold storage with good thermal insulation, comprising: an outer layer, a sandwich layer and an inner layer, the two end surfaces of the sandwich layer are respectively bonded to the outer layer and the inner layer to form a polyurethane sandwich panel body, and a snap fastener of the same height is provided on one side in the length direction of the polyurethane sandwich panel;

[0011] The sandwich layer is composed of a high-density layer, a medium-density layer and a low-density layer, and thin plates of the same size are arranged between the high-density layer, the medium-density layer and the low-density layer, the high-density layer is close to the inner layer, the low-density layer is close to the outer layer, and the medium-density layer is located between the high-density layer and the low-density layer;

[0012] A plurality of rectangular supports are arranged equidistantly along the length direction on the outer side of the inner layer, an inner layer sub-plate is installed on the outer side of the rectangular support, and a clamp is provided on one side between the inner layer sub-plate and the inner layer.

[0013] Furthermore, the fastener is of "T"-shaped design, and one side of the "T"-shaped vertical part is fitted with the side of the polyurethane sandwich panel body, and the other side is adapted to the side size of the adjacent polyurethane sandwich panel body, and is fixed to the side of the adjacent polyurethane sandwich panel body at the T"-shaped horizontal part by bolts.

[0014] Furthermore, the density of the high-density layer is 35-50 kg / m 3 The density of the medium density layer is 25-35 kg / m 3 The density of the low-density layer is 15-25 kg / m 3 .

[0015] Furthermore, the thin plate is made of stainless steel or aluminum alloy.

[0016] Furthermore, the rectangular support is a hollow structure integrally formed with the inner layer and has the same height as the main body of the polyurethane sandwich panel.

[0017] Furthermore, the inner sub-plate is mounted on the rectangular support by means of bolts.

[0018] Furthermore, the clamp is installed between the inner sub-plate and the inner layer by bolts, and its size is the same as the gap between the inner sub-plate and the inner layer. Several groups of sealing strips are bonded to the two ends of the clamp and the inner side of the buckle along the length direction.

[0019] The beneficial effects of the utility model are:

[0020] 1. By adopting a multi-layer sandwich design, including a high-density layer, a medium-density layer and a low-density layer, and setting a thin plate between the layers, this design optimizes the heat conduction path of the material and effectively improves the overall thermal insulation performance of the sandwich panel. At the same time, the layer structure of different densities can be flexibly adjusted according to specific needs to achieve the best thermal insulation effect without significantly increasing the thickness of the sandwich layer, thereby avoiding the problem of increasing the floor space and overall weight of the cold storage;

[0021] Since the improvement of thermal insulation performance is not achieved by simply increasing the thickness of the sandwich layer, the amount and cost of materials can be controlled while maintaining or improving the thermal insulation effect. In addition, the design of multi-layer sandwich layers also makes the use of materials more efficient, which helps to reduce costs.

[0022] 2. The use of "T"-shaped fasteners for connecting polyurethane sandwich panels not only simplifies the installation process, but also significantly improves the tightness and sealing of the connection. Compared with the traditional block structure and slot structure, this design reduces the heat leakage problem caused by loose connection and improves the overall insulation effect of the cold storage. At the same time, the design of the fasteners also makes the fixation between adjacent sandwich panels more firm and reliable, and enhances the stability of the cold storage structure. The latter has low cost and simple installation.

[0023] The rectangular support on the outside of the inner layer and the inner sub-panel design not only increase the overall strength of the sandwich panel, but also provide additional support points, which help to resist various stresses that may occur inside the cold storage. This design enables the sandwich panel to better maintain its shape and performance stability during long-term use, and the cavity formed further increases the insulation effect.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 It is an enlarged schematic diagram of structure A of the utility model;

[0028] Figure 3 It is a partial diagram of the installation structure of adjacent polyurethane sandwich panels of the utility model.

[0029] In the figure:

[0030] 1. Outer layer;

[0031] 2. Sandwich layer; 21. High density layer; 22. Medium density layer; 23. Low density layer; 24. Thin plate;

[0032] 3. Inner layer; 31. Rectangular support; 32. Inner layer sub-plate; 33. Card;

[0033] 4. Fasteners. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Example:

[0036] like Figures 1 to 3 As shown, a polyurethane sandwich panel for cold storage with good thermal insulation performance comprises: an outer layer 1, a sandwich layer 2 and an inner layer 3, the two end surfaces of the sandwich layer 2 are respectively bonded to the outer layer 1 and the inner layer 3 to form a polyurethane sandwich panel body, and a snap-fitting piece 4 of the same height is provided on one side in the length direction of the polyurethane sandwich panel;

[0037] Among them, the clip 4 is of "T"-shaped design, and one side of the "T"-shaped vertical part is fitted with the side of the polyurethane sandwich panel body, and the other side is adapted to the side size of the adjacent polyurethane sandwich panel body, and is fixed to the side of the adjacent polyurethane sandwich panel body at the T"-shaped horizontal part by bolts.

[0038] like Figure 2 and 3 As shown, the sandwich layer 2 is composed of a high-density layer 21, a medium-density layer 22 and a low-density layer 23, and thin plates 24 of the same size are arranged between the high-density layer 21, the medium-density layer 22 and the low-density layer 23, the high-density layer 21 is close to the inner layer 3, the low-density layer 23 is close to the outer layer 1, and the medium-density layer 22 is located between the high-density layer 21 and the low-density layer 23;

[0039] To supplement the sandwich layer 2, the density of the high-density layer 21 is 35-50 kg / m 3 The density of the medium density layer 22 is 25-35 kg / m 3 The density of the low-density layer 23 is 15-25 kg / m 3 , through the structural design of different densities, the sandwich panels have better adaptability and thermal insulation performance under different temperature conditions;

[0040] Specifically, high-density polyurethane foam has better thermal insulation performance, which can effectively reduce the cold loss inside the cold storage and improve the insulation effect. Using high-density foam near the inside of the cold storage can ensure the temperature stability of the core area;

[0041] The medium density layer 22 helps to reduce the stress concentration problem caused by the sudden change of density in the transition density area, and can balance the thermal insulation performance and material cost to a certain extent;

[0042] Although low-density polyurethane foam has relatively poor thermal insulation performance, it is lighter and less expensive. Using low-density foam near the outside of the cold storage can reduce the weight and cost of the overall structure while ensuring a certain thermal insulation effect.

[0043] More specifically, in practical applications, the densities of the high-density layer 21, the medium-density layer 22, and the low-density layer 23 should be comprehensively considered and designed based on factors such as the specific needs of the cold storage and the use environment.

[0044] The thin plate 24 is made of stainless steel or aluminum alloy.

[0045] like Figure 2 and 3 As shown, a plurality of rectangular supports 31 are arranged equidistantly along the length direction on the outside of the inner layer 3 , an inner layer sub-plate 32 is installed on the outside of the rectangular supports 31 , and a clamp 33 is provided on one side between the inner layer sub-plate 32 and the inner layer 3 .

[0046] To supplement the inner layer 3, the rectangular support 31 is a hollow structure formed integrally with the inner layer 3 and has the same height as the main body of the polyurethane sandwich panel.

[0047] The inner sub-plate 32 is mounted on the rectangular support 31 by bolts.

[0048] The overall strength and stability of the sandwich panel are further enhanced by the rectangular support and the inner sub-panel 32. The rectangular support is a hollow structure and is integrally formed with the inner layer, which not only reduces the weight but also improves the structural efficiency. The inner sub-panel 32 is installed on the rectangular support by bolts, providing additional support and protection for the sandwich panel.

[0049] Furthermore, the clip 33 is installed between the inner sub-plate 32 and the inner layer 3 by bolts, and its size is the same as the gap between the inner sub-plate 32 and the inner layer 3. Several groups of sealing strips 5 are bonded to the two ends of the clip 33 and the inner side of the fastener 4 along the length direction. By bonding sealing strips to the inner sides of the clip 33 and the fastener 4, the sealing of the docking part is further enhanced. The use of sealing strips can effectively prevent air and moisture from penetrating into the cold storage through the docking gap, thereby ensuring the stability and safety of the internal environment of the cold storage.

[0050] In summary, this embodiment provides a polyurethane sandwich panel for cold storage with good thermal insulation performance, and its structural design fully considers the requirements of thermal insulation performance, structural strength, installation convenience and sealing performance. By adopting a multi-layer sandwich layer 2 design and arranging thin plates 24 of the same size between the high-density layer 21, the medium-density layer 22 and the low-density layer 23, the overall thermal insulation performance of the sandwich panel is effectively improved, while avoiding the problem of increased floor space, weight and cost caused by increasing the thickness of the sandwich layer;

[0051] In addition, the polyurethane sandwich panel has made innovations in the docking structure, using a "T"-shaped clip 4 for fixed connection, which not only simplifies the installation process, but also significantly improves the tightness and sealing of the connection. The design of the clip 4 makes the fixation between adjacent sandwich panels more firm and reliable.

[0052] The various devices selected in this application are all universal standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0053] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0055] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A polyurethane sandwich panel for cold storage with good thermal insulation, characterized in that: include: An outer layer (1), a sandwich layer (2) and an inner layer (3), wherein the two end surfaces of the sandwich layer (2) are respectively bonded to the outer layer (1) and the inner layer (3) to form a polyurethane sandwich panel body, and a snap fastener (4) of the same height is provided on one side in the length direction of the polyurethane sandwich panel; The sandwich layer (2) is composed of a high-density layer (21), a medium-density layer (22) and a low-density layer (23), and thin plates (24) of the same size are arranged between the high-density layer (21), the medium-density layer (22) and the low-density layer (23), the high-density layer (21) is close to the inner layer (3), the low-density layer (23) is close to the outer layer (1), and the medium-density layer (22) is located between the high-density layer (21) and the low-density layer (23); A plurality of rectangular supports (31) are arranged equidistantly along the length direction on the outside of the inner layer (3), an inner layer sub-plate (32) is installed on the outside of the rectangular supports (31), and a clamping piece (33) is provided on one side between the inner layer sub-plate (32) and the inner layer (3).

2. A polyurethane sandwich panel for cold storage with good thermal insulation as claimed in claim 1, characterized in that: The snap fastener (4) is of "T"-shaped design, and one side of the "T"-shaped vertical portion is fitted to the side of the polyurethane sandwich panel body, and the other side is adapted to the size of the side of the adjacent polyurethane sandwich panel body, and is fixed to the side of the adjacent polyurethane sandwich panel body at the T"-shaped horizontal portion by bolts.

3. The polyurethane sandwich panel for cold storage with good thermal insulation as claimed in claim 1, characterized in that: The density of the high-density layer (21) is 35-50 kg / m 3 The density of the medium density layer (22) is 25-35 kg / m 3 The density of the low-density layer (23) is 15-25 kg / m 3 .

4. The polyurethane sandwich panel for cold storage with good thermal insulation as claimed in claim 1, characterized in that: The thin plate (24) is made of stainless steel or aluminum alloy.

5. The polyurethane sandwich panel for cold storage with good thermal insulation as claimed in claim 1, characterized in that: The rectangular support (31) is a hollow structure formed integrally with the inner layer (3) and has the same height as the main body of the polyurethane sandwich panel.

6. The polyurethane sandwich panel for cold storage with good thermal insulation as claimed in claim 1, characterized in that: The inner layer sub-plate (32) is mounted on the rectangular support (31) by means of bolts.

7. The polyurethane sandwich panel for cold storage with good thermal insulation as claimed in claim 1, characterized in that: The clamp (33) is installed between the inner layer sub-plate (32) and the inner layer (3) by means of bolts, and its size is the same as the gap between the inner layer sub-plate (32) and the inner layer (3). A plurality of groups of sealing strips (5) are bonded to the two ends of the clamp (33) and the inner side of the snap fastener (4) along the length direction.

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