Cold bridge prevention embedded fixing part and cold storage sandwich panel

Abstract

The utility model provides a kind of anti-cold bridge pre-burying fixing piece, the anti-cold bridge pre-burying fixing piece includes two pre-burying pieces, two draw together, heat insulating block and fixed bolt, two the pre-burying piece is arranged in the both sides of heat insulating block, two The draw together is located in the both sides of heat insulating block, one side pre-burying piece is fixedly connected with the draw together of other side by fixed bolt, and the pre-burying piece and draw together of same side are not contact setting.The utility model discloses anti-cold bridge pre-burying fixing piece and cold storage sandwich board, by setting heat insulating block between the pre-burying piece of both sides, so that the pre-burying piece of both sides does not directly contact, to cut off the passage of cold and heat exchange, block cold and heat bridge, reduce the loss of cold quantity in cold storehouse and the import of external heat, reduce the energy consumption of cold storehouse, improve refrigeration efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cold storage installation technology, specifically to an anti-cold bridge pre-embedded fixing component and a cold storage sandwich panel. Background Technology

[0002] In cold storage construction, polyurethane sandwich panels have become the mainstream insulation material due to their excellent thermal insulation performance. However, in practical applications, there are many problems with the connection between polyurethane sandwich panels and the keel. The tensile strength of polyurethane material itself is insufficient, making it difficult to guarantee the connection strength when fixing the polyurethane sandwich panels to the keel. When the cold storage is affected by the external environment (such as temperature changes, vibration, etc.), the existing connection method is prone to loosening and displacement between the sandwich panels and the keel, seriously affecting the structural stability and thermal insulation effect of the cold storage.

[0003] Meanwhile, as a low-temperature storage facility, thermal bridging is a key factor affecting the insulation performance of cold storage. Traditional embedded parts are mostly made of pure metal, which has high strength, but metal is an excellent conductor of heat. During the connection between the polyurethane cold storage sandwich panels and the frame, these metal embedded parts easily become channels for heat exchange, forming thermal bridges. This causes cold air inside the cold storage to dissipate outwards through the embedded parts, increasing energy consumption. Simultaneously, external heat may also enter the cold storage through the embedded parts, affecting its refrigeration effect. Furthermore, condensation and icing may occur around the embedded parts, further damaging the structure and insulation performance of the cold storage.

[0004] In view of this, it is necessary to improve the existing installation structure of cold storage sandwich panels in order to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a pre-embedded fastener for preventing cold bridges, so as to solve the problem that the existing fastening structure is not strong enough and conventional pre-embedded fasteners will form cold and thermal bridges.

[0006] To achieve the above objectives, this utility model provides a pre-embedded fixing component for preventing cold bridges. The pre-embedded fixing component for preventing cold bridges includes two pre-embedded components, two tie components, a heat insulation block, and fixing bolts. The two pre-embedded components are disposed on both sides of the heat insulation block, and the two tie components are located on both sides of the heat insulation block. The pre-embedded component on one side is fixedly connected to the tie component on the other side by fixing bolts. The pre-embedded component and the tie component on the same side are disposed in a non-contact manner.

[0007] As a further improvement of this utility model, the embedded part includes an installation part away from the heat insulation block, a first fixing part close to the heat insulation block and located on both sides of the installation part, and a connecting part connecting the first fixing part and the installation part. The first fixing part is used for a fixing bolt to pass through, and the installation part and the connecting part enclose a receiving space.

[0008] As a further improvement of this utility model, the connecting part is provided with a through foam overflow hole.

[0009] As a further improvement of this utility model, the two ends of the mounting part are provided with positioning parts protruding towards the side away from the heat insulation block.

[0010] As a further improvement of this utility model, the tie member includes a plug-in portion for protruding along the direction perpendicular to the heat insulation block, and a second fixing portion disposed at one end of the plug-in portion away from the heat insulation block. The heat insulation block has a recessed interface for the plug-in portion to be inserted into, and the second fixing portion is used to fix it to the first fixing portion.

[0011] As a further improvement of this utility model, the cross-section of the tie member is L-shaped, and the extension directions of the tie members on both sides are perpendicular to each other.

[0012] As a further improvement of this utility model, the cross-section of the tie member is U-shaped, and the extension directions of the tie members on both sides are the same.

[0013] As a further improvement of this utility model, the heat insulation block is made of polyurethane cryogenic composite material with added glass fiber.

[0014] As a further improvement of this utility model, the edge of the embedded part has serrations.

[0015] This utility model also provides a cold storage sandwich panel, which includes a main structural keel, an additional keel spaced apart from the main structural keel, a foam layer filled between the main structural keel and the additional keel, and a cold bridge pre-embedded fastener as described above. The cold bridge pre-embedded fastener is embedded in the foam layer, and the two pre-embedded fasteners are respectively fixedly connected to the main structural keel and the additional keel.

[0016] The beneficial effects of this utility model are: the anti-cold bridge pre-embedded fixing component and cold storage sandwich panel of this utility model, by setting the heat insulation block between the pre-embedded components on both sides, so that the pre-embedded components on both sides do not directly contact each other, thereby cutting off the channel of cold and heat exchange, blocking the cold and heat bridge, reducing the loss of cold energy inside the cold storage and the transfer of external heat, reducing the energy consumption of the cold storage and improving the refrigeration efficiency. Attached Figure Description

[0017] 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: Figure 1 This is a structural schematic diagram of the cold storage sandwich panel of this utility model; Figure 2This is a three-dimensional structural schematic diagram of the anti-cold bridge pre-embedded fixing component according to Embodiment 1 of this utility model; Figure 3 This is an exploded structural diagram of the anti-cold bridge pre-embedded fixing component according to Embodiment 1 of this utility model; Figure 4 This is a side view of the anti-cold bridge embedded fixing component according to Embodiment 1 of this utility model; Figure 5 This is an exploded side view of the anti-cold bridge pre-embedded fixing component according to Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the structure of the embedded part of the anti-cold bridge pre-embedded fixing part of this utility model; Figure 7 This is a three-dimensional structural diagram of the anti-cold bridge pre-embedded fixing component of Embodiment 2 of this utility model. Detailed Implementation

[0018] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] like Figures 1 to 7As shown, the anti-cold bridge pre-embedded fixing component 1 of this utility model includes two pre-embedded components 11, two tie components 12, a heat insulation block 13, and a fixing bolt 14.

[0022] Two embedded parts 11 are disposed on both sides of the heat insulation block 13, and two connecting parts 12 are located on both sides of the heat insulation block 13. The embedded part 11 on one side and the connecting part 12 on the other side are fixedly connected by fixing bolts 14. The embedded part 11 and the connecting part 12 on the same side are disposed in a non-contact manner. In this embodiment, the embedded part 11 and the connecting part 12 on the same side are disposed at intervals, and the embedded part 11 and the connecting part 12 on the same side do not directly contact each other, so there is no heat transfer due to direct contact.

[0023] The embedded part 11 is made of high-strength metal and is used to connect with the keel on both sides, while providing a convenient and secure installation method for the decorative panel 5 on the outside. This effectively solves the problem of insufficient connection strength between the foam material and the keel. In actual use, it can withstand greater external forces, such as vibrations generated during the handling of goods inside the cold storage, and material expansion and contraction stress caused by temperature changes, greatly improving the stability and safety of the cold storage structure. It also avoids the thermal bridging problems caused by traditional methods of drilling through the cold storage panels or using the original embedded parts, improving the installation quality and service life of the decorative panel 5. After installation, the decorative panel 5 remains firmly in place even under the complex environment of the cold storage for a long time, and is not easily detached, effectively improving the aesthetics and protective performance of the cold storage.

[0024] This invention, by positioning the heat insulation block 13 between the embedded parts 11 on both sides, prevents the embedded parts 11 from directly contacting each other, thereby cutting off the heat exchange channel, blocking thermal bridges, reducing the loss of cold energy inside the cold storage and the inflow of external heat, lowering the energy consumption of the cold storage, and improving refrigeration efficiency. Simultaneously, it avoids condensation and icing around the embedded parts 11 caused by temperature differences, protecting the structure and insulation performance of the cold storage, and extending the maintenance cycle and service life of the cold storage. The heat insulation block 13 is located between the embedded parts 11 and the connecting parts 12; when the embedded parts 11 and the connecting parts 12 are connected, the heat insulation block 13 is simultaneously fixed.

[0025] In this embodiment, the embedded part 11 includes an installation portion 111 away from the heat insulation block 13, a first fixing portion 112 close to the heat insulation block 13 and located on both sides of the installation portion 111, and a connecting portion 113 connecting the first fixing portion 112 and the installation portion 111. The first fixing portion 112 is used for the passing of fixing bolts 14. The installation portion 111 and the connecting portion 113 enclose a receiving space. The receiving space has a U-shaped or trapezoidal cross section, and the opening faces the heat insulation block 13. The receiving space is used to fill foam material.

[0026] The connecting part 113 is provided with a through-hole 114 for foam overflow. The foamed material can enter the receiving space through the overflow hole 114 and surround the insulation block 13. This allows the anti-cold bridge embedded fixing part 1 to be tightly bonded to the foamed material, changing the stress state of the core material from tensile strength to compressive strength of the insulation block 13. This fully utilizes the material properties and greatly compensates for the insufficient tensile strength of the foamed material. This significantly improves the overall strength of the cold storage sandwich panel 100, enabling it to better adapt to the cold storage environment and extend the service life of the cold storage.

[0027] The mounting part 111 has positioning parts 115 protruding from both ends toward the side away from the heat insulation block 13. The positioning parts 115 can be inserted into the corresponding process slots on the steel plates on both sides of the foaming material, which can accurately position the parts and reduce the risk of the embedded parts 11 deviating when the foaming material is injected.

[0028] The connecting member 12 includes a plug-in portion 121 for protruding in a direction perpendicular to the heat insulation block 13, and a second fixing portion 122 disposed at one end of the plug-in portion 121 away from the heat insulation block 13. The heat insulation block 13 has a recessed insertion interface 131 for the plug-in portion 121 to be inserted into, and the second fixing portion 122 is used to be fixedly connected to the first fixing portion 112.

[0029] The insertion interface 131 of the heat insulation block 13 limits the insertion part 121. In this embodiment, the insertion part 121 is arranged in a direction perpendicular to the heat insulation block 13.

[0030] The fixing bolt 14 is a fixing bolt 14. In this embodiment, the first fixing part 112 and the second fixing part 122 are provided with openings. The openings on the first fixing part 112 and the second fixing part 122 are exposed to the outside of the heat insulation block 13. The fixing bolt 14 passes through the openings to fix the tie member 12 and the embedded part 11 on the other side of the heat insulation block 13.

[0031] For different types of tie members 12, this utility model provides the following two embodiments: Example 1: like Figures 2 to 5 As shown, in this embodiment, the cross-section of the tie member 12 is L-shaped, and the extension directions of the tie members 12 on both sides are perpendicular to each other. Correspondingly, the extension directions of the embedded parts 11 on both sides are perpendicular to each other. The part of the tie member 12 protruding outside the heat insulation block 13 is located in the receiving space. The tie member 12 and the embedded part 11 are fixed by fixing bolts 14, and the heat insulation block 13 is fixed from both sides. At the same time, the plug-in part 121 limits the heat insulation block 13 along the plane direction. Here, the plane direction is relative to the direction perpendicular to the heat insulation block 13.

[0032] Example 2: like Figure 6As shown, the tie member 12 has a U-shaped cross-section, and the extension directions of the tie members 12 on both sides are the same. Correspondingly, the extension directions of the embedded parts 11 on both sides are parallel to each other. The second fixing part 122 is provided with a plug-in part 121 on both sides. The tie member 12 with the U-shaped cross-section has a better fixing effect than the heat insulation block 13.

[0033] In this embodiment, the lengths of the tie members 12 on both sides are different, and at least one of the tie members 12 is provided with a clearance hole for making way for the fixing bolts 14 of another set.

[0034] In this embodiment, the receiving space cannot make way for the tie member 12. Therefore, in this embodiment, the heat insulation block 13 is recessed in the vertical direction to form a clearance space, and the tie member 12 is received in the clearance space to avoid contact with the embedded part 11 on the same side.

[0035] The heat insulation block 13 is made of cryogenic polyurethane composite material with added glass fiber. The cryogenic polyurethane composite material has a thermal conductivity of 0.0240 W / mk at room temperature and a compressive strength of about 1.5 MPa, which is 10 times that of conventional polyurethane materials. It has extremely superior performance in terms of compressive strength and thermal insulation. The heat insulation block 13 is fixed with the tie member 12 by opening the insertion interface 131 on the surface, and then the tie member 12 is connected to the embedded part 11 with fixing bolts 14 to ensure that the two are tightly fitted.

[0036] The embedded part 11 has serrated edges. The foam overflow holes 114 and serrated edges on the embedded part 11 both help to increase the gripping force of the foam material on the embedded part 11. At the same time, the addition of a large amount of glass fiber to the heat insulation block 13, which results in a high surface roughness, also helps to ensure a tight bond between the foam material and the heat insulation block 13.

[0037] like Figure 1 As shown, this utility model also provides a cold storage sandwich panel 100, including a main structural keel 2, an additional keel 3 spaced apart from the main structural keel 2, a foam layer 4 filled between the main structural keel 2 and the additional keel 3, and a cold bridge pre-embedded fastener 1. The cold bridge pre-embedded fastener 1 is embedded in the foam layer 4, and the two pre-embedded fasteners 11 are respectively fixedly connected to the main structural keel 2 and the additional keel 3.

[0038] The foam layer 4 has steel plates on both sides.

[0039] The cold storage sandwich panel 100 may also include a decorative panel 5, which is located on the side of the additional keel 3 away from the foamed side layer. The decorative panel 5 can be directly fixed to the additional keel 3 or fixedly fixed to the embedded part 11.

[0040] The construction of a cold storage facility includes the following steps: Step 1: Fabricate the anti-cold bridge embedded fastener 1, mainly including the fabrication of embedded part 11, tie part 12, and heat insulation block 13. The fixing bolts 14 can be qualified products purchased from the market. High-strength galvanized steel plate material is selected. According to the design dimensions and shape requirements, the embedded part 11 and tie part 12 are fabricated through mechanical processing, cutting, and bending processes to ensure the dimensional accuracy and surface quality of the structure and meet the actual use requirements.

[0041] The heat insulation block 13 is processed according to the shape and size of the contact part between the anti-cold bridge pre-embedded fixing part 1 and the cold storage sandwich panel 100. The tie part 12 is fixed by opening the insertion interface 131 on the surface, and then the tie part 12 is connected to the pre-embedded part 11 with the fixing bolt 14 to ensure that the foam layer 4 is tightly attached to the anti-cold bridge pre-embedded fixing part 1. The completed anti-cold bridge embedded fastener 1 undergoes quality inspection, including dimensional accuracy inspection, surface defect inspection, mechanical property testing, and thermal insulation performance testing. This ensures that all performance indicators of the anti-cold bridge embedded fastener 1 meet design requirements and relevant standards.

[0042] Step Two: Pre-installation of Anti-Cold Bridge Embedded Fixing Component 1. First, based on the design dimensions of the cold storage sandwich panel 100 and the installation requirements of the anti-cold bridge embedded fixing component 1, mark the corresponding positions on the production line to determine the pre-installation location and quantity of the anti-cold bridge embedded fixing component 1. Simultaneously, check the quality of the anti-cold bridge embedded fixing component 1 to ensure that all performance indicators meet the requirements, especially that the embedded component 11 and the insulation block 13 are undamaged. Polyurethane material is selected for the foaming material. Then, clean the production line to ensure that the inner and outer steel plates of the cold storage sandwich panel 100 are smooth, clean, and free of impurities and residues, so as not to affect the bonding between the polyurethane material and the mold and the anti-cold bridge embedded fixing component 1.

[0043] During the production of the cold storage sandwich panel 100, after all preliminary work is completed, adhesive is applied to the part where the pre-embedded parts meet the panel. The anti-cold bridge pre-embedded fasteners 1 are then accurately placed in the upper and lower steel plate forming sections and the polyurethane foaming section of the cold storage sandwich panel 100 according to the marked positions. This ensures that the anti-cold bridge pre-embedded fasteners 1 and the heat insulation block 13 are in full contact with the polyurethane material when it is in a liquid or semi-liquid state. During placement, handle with care to avoid deformation of the anti-cold bridge pre-embedded fasteners 1 or damage to the heat insulation block 13 due to impact. For cold storage sandwich panels 100 requiring multiple anti-cold bridge pre-embedded fasteners 1, ensure that the distance between each anti-cold bridge pre-embedded fastener 1 is uniform and the position is symmetrical, conforming to design specifications. After placement, the panels enter the double-track shaping section to prevent displacement during the polyurethane material curing process.

[0044] During the installation of the anti-cold bridge embedded fastener 1, precision measuring tools (such as vernier calipers, laser positioning instruments, etc.) are used to measure and adjust the position of the anti-cold bridge embedded fastener 1 in real time. Ensure that the deviation between the centerline of the anti-cold bridge embedded fastener 1 and the design baseline does not exceed ±5mm, the planar position deviation does not exceed ±5mm, and the verticality deviation does not exceed 0.5°. For anti-cold bridge embedded fastener 1 with special positional requirements (such as the starting position of the building, corner positions, the top of the building, and other critical parts), multiple measurements and calibrations should be performed to ensure that its positional accuracy meets the installation requirements. The depth and angle of the anti-cold bridge embedded fastener 1, and its position in the sandwich panel, can be ensured using specialized tooling or molds to assist in the embedding operation of the anti-cold bridge embedded fastener 1, improving the accuracy and efficiency of the embedding. After the anti-cold bridge embedded fastener 1 is fixed, liquid polyurethane material is injected into the inner and outer steel plates of the cold storage sandwich panel to form a foam layer 4. During the injection process, the injection speed and pressure must be controlled to ensure that the polyurethane material fully fills all spaces inside the mold, including the gaps around the anti-cold bridge embedded fastener 1. Ensure that the polyurethane material is in close contact with the anchoring components of the anti-cold bridge embedded fastener 1 and the heat insulation block 13, without the formation of air bubbles or voids. During the polyurethane foam curing process, a dedicated person is assigned to monitor and observe whether the anti-cold bridge embedded fastener 1 is displaced due to material expansion. If displacement is found, corrective measures are taken in a timely manner. After the polyurethane material has been shaped in the double-track section and completely cured in the drying room section, the anti-cold bridge embedded fastener 1 should be firmly embedded in the foam layer 4, forming a reliable mechanical bond between the anti-cold bridge embedded fastener 1 and the polyurethane material, and the heat insulation block 13 should be tightly attached to the polyurethane material without any loosening or detachment.

[0045] Step 3: At the cold storage installation site, transport the cold storage sandwich panel 100 with the pre-embedded anti-cold bridge fastener 1 to the installation position. According to the design of the connection part 113, use the appropriate fastening method to firmly connect the foam layer 4 to the main structural keel 2. Ensure the tightness and reliability of the connection to avoid loosening. Step 4: After the cold storage sandwich panel 100 is installed, move the outer decorative panel 5 to the installation position according to the design requirements. Locate the installation position of the anti-cold bridge embedded fastener 1 by measurement, and connect the decorative panel 5 and the additional keel 3 to the foam layer 4. Install the decorative panel 5 accurately on the outside of the foam layer 4 according to the connection method of the installation part 111. Ensure that the decorative panel 5 is installed flat and firmly, achieving the expected aesthetic and protective effects. The cold bridge prevention pre-embedded fixing component 1 and the cold storage sandwich panel 100 of this utility model, by setting the heat insulation block 13 between the pre-embedded components 11 on both sides, so that the pre-embedded components 11 on both sides do not directly contact each other, thereby cutting off the channel for heat exchange, blocking the heat bridge, reducing the loss of cold energy inside the cold storage and the introduction of external heat, reducing the energy consumption of the cold storage and improving the refrigeration efficiency.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pre-embedded fastener for preventing cold bridges, characterized in that: The anti-cold bridge pre-embedded fixing component includes two pre-embedded components, two tie components, a heat insulation block, and fixing bolts. The two pre-embedded components are arranged on both sides of the heat insulation block, and the two tie components are located on both sides of the heat insulation block. The pre-embedded component on one side is fixedly connected to the tie component on the other side by fixing bolts. The pre-embedded component and the tie component on the same side are arranged in a non-contact manner.

2. The anti-cold bridge embedded fastener according to claim 1, characterized in that: The embedded part includes an installation part away from the heat insulation block, a first fixing part close to the heat insulation block and located on both sides of the installation part, and a connecting part connecting the first fixing part and the installation part. The first fixing part is used for a fixing bolt to pass through, and the installation part and the connecting part enclose a receiving space.

3. The anti-cold bridge embedded fastener according to claim 2, characterized in that: The connecting part is provided with a through foam overflow hole.

4. The anti-cold bridge embedded fastener according to claim 2, characterized in that: The mounting portion has positioning portions protruding from both ends toward the side away from the heat insulation block.

5. The anti-cold bridge embedded fastener according to claim 2, characterized in that: The connecting member includes a plug-in portion for protruding along a direction perpendicular to the heat insulation block, and a second fixing portion disposed at one end of the plug-in portion away from the heat insulation block. The heat insulation block has a recessed interface for inserting the plug-in portion, and the second fixing portion is used to fix it to the first fixing portion.

6. The anti-cold bridge embedded fastener according to claim 5, characterized in that: The cross-section of the tie member is L-shaped, and the extension directions of the tie members on both sides are perpendicular to each other.

7. The anti-cold bridge embedded fastener according to claim 5, characterized in that: The tie member has a U-shaped cross-section, and the tie members on both sides extend in the same direction.

8. The anti-cold bridge embedded fastener according to claim 1, characterized in that: The heat insulation block is made of polyurethane cryogenic composite material with added glass fiber.

9. The anti-cold bridge embedded fastener according to claim 1, characterized in that: The edges of the embedded part are serrated.

10. A cold storage sandwich panel, characterized in that: The cold storage sandwich panel includes a main structural keel, an additional keel spaced apart from the main structural keel, a foam layer filling the space between the main structural keel and the additional keel, and a cold bridge anti-bridging pre-embedded fastener as described in any one of claims 1-9. The cold bridge anti-bridging pre-embedded fastener is embedded in the foam layer, and the two pre-embedded fasteners are respectively fixedly connected to the main structural keel and the additional keel.

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