Installation and construction method for sandwich color steel insulation board of industrial refrigeration house

Abstract

The invention discloses an industrial cold storage sandwich color steel insulation board installation construction method. The method comprises the steps that after a cold storage wall is leveled, a damp-proof vapor-proof film is laid; surveying and setting out on a wall body; a plurality of sandwich color steel heat preservation plates are sequentially laid on a wall body, and when the next sandwich color steel heat preservation plate is laid, one adjacent side of the next sandwich color steel heat preservation plate and one adjacent side of the laid previous sandwich color steel heat preservation plate are oppositely arranged to form a joint. One side of an electromagnetic adsorption device is magnetically adsorbed to the outer side of the previous sandwich color steel heat preservation plate, and the other side of the electromagnetic adsorption device is magnetically adsorbed to the outer side of the next sandwich color steel heat preservation plate; and a press roller is adopted to roll the edge locking strip along the length defense line of the joint to form a continuous mechanical occlusion structure, and a joint mixture is injected synchronously. The problems of low efficiency and low installation precision caused by adjusting joints through manual knocking during installation of traditional cold storage core color steel insulation boards are solved.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a method for installing sandwich color steel insulation panels for industrial cold storage. Background Technology

[0002] Cold storage sandwich panel (color steel sandwich panel) is a composite insulation material with a color steel sheet as the surface layer and rigid polyurethane foam or rock wool as the core material. It features excellent thermal insulation performance, fire and moisture resistance, and ease of installation and maintenance. Sandwich panel is widely used in low-temperature insulation projects such as cold storage, refrigerated trucks, and freezers. When installing cold storage sandwich panel, strict construction techniques must be followed, including base treatment, panel cutting, splicing, fixing, and sealing, to ensure tight joints and no thermal bridging for optimal insulation. During installation, attention must also be paid to the verticality and flatness of the panels, as well as the spacing and depth of the anchors, to ensure the stability and service life of the cold storage structure.

[0003] However, in existing technologies, the installation of traditional cold storage panels relies on manual hammering and temporary bolt fixing, which can easily lead to panel deformation, misalignment of joints, and uneven sealant filling causing thermal bridging. Manual operation is inefficient and difficult to maintain installation accuracy, and the overall airtightness and structural stability cannot meet the long-term service requirements under ultra-low temperature conditions. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, a construction method for installing sandwich color steel insulation panels for industrial cold storage is provided to solve the problems of low efficiency and low installation accuracy caused by manually adjusting the joints of traditional cold storage sandwich color steel insulation panels.

[0005] To achieve the above objectives, a method for installing sandwich-type color steel insulation panels in industrial cold storage is provided, comprising the following steps:

[0006] Clean and level the base layer of the cold storage wall, and then lay a moisture-proof and vapor-barrier membrane after leveling;

[0007] Measure and lay out lines on the wall and pre-embed laser positioning reflective sheets at the four corners of the wall;

[0008] Reception grooves are respectively opened on the two adjacent sides of the sandwich color steel insulation panel;

[0009] Magnetic adhesive strips are filled into the receiving groove and then encapsulated with adhesive.

[0010] Multiple sandwich-type color steel insulation panels are sequentially laid on the wall. When laying the next sandwich-type color steel insulation panel, one adjacent side of the next sandwich-type color steel insulation panel is aligned with one adjacent side of the previously laid sandwich-type color steel insulation panel to form a joint. Then, one side of the electromagnetic adsorption device is magnetically adsorbed onto the outside of the previous sandwich-type color steel insulation panel, and the other side of the electromagnetic adsorption device is magnetically adsorbed onto the outside of the next sandwich-type color steel insulation panel, so that the outside of the previous sandwich-type color steel insulation panel is precisely aligned with the outside of the next sandwich-type color steel insulation panel.

[0011] A pressure roller is used to roll the seam guard strip along the length of the joint to form a continuous mechanical interlocking structure, and sealant is injected simultaneously.

[0012] Furthermore, after the cold storage is sealed by laying the blocks, a vortex leak detector is turned on to detect leaks by pressure difference method, and the sealing level is confirmed by thermal smoke visualization test.

[0013] Furthermore, after confirming the sealing level, an anti-condensation nano-coating is sprayed onto the outer side of the sandwich color steel insulation panel, and a distributed fiber optic sensor network is installed to monitor the temperature strain and sealing performance of the sandwich color steel insulation panel in real time.

[0014] Furthermore, the magnetic adhesive strip includes an adhesive strip body and neodymium iron boron permanent magnet particles embedded in the adhesive strip body.

[0015] Furthermore, the adhesive is a modified polyurethane adhesive.

[0016] Furthermore, while the electromagnetic adsorption device is magnetically adsorbed onto two adjacent sandwich color steel insulation panels, stainless steel self-tapping screws are used to penetrate the folded edges of the two adjacent sandwich color steel insulation panels and pre-tightened to a torque of 20 N·m to form a temporary mechanical connection; low-temperature elastic silicone sealant is injected into the joint; polyurethane sealant is applied to the outside of the joint; and the electromagnetic adsorption device is removed after the low-temperature elastic silicone sealant has dried to the surface.

[0017] The beneficial effects of this invention are that the installation method for sandwich-type color steel insulation panels in industrial cold storage significantly improves construction accuracy and efficiency through innovative splicing technology using an electromagnetic adsorption device. This method utilizes the synergistic effect of pre-embedded magnetic strips and the electromagnetic adsorption device, enabling millimeter-level automatic alignment of the sandwich-type color steel insulation panels during splicing, completely avoiding the deformation or misalignment problems caused by traditional manual hammering adjustments. The uniform distribution of electromagnetic force by the electromagnetic adsorption device ensures that the joint gap is stably controlled within 0.3 mm. Combined with the double filling of low-temperature elastic silicone sealant, a continuous sealing layer without cold bridges is formed, fundamentally eliminating the risk of cold air leakage. Attached Figure Description

[0018] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram illustrating the state of the electromagnetic adsorption device magnetically adsorbed onto two adjacent sandwich color steel insulation panels according to an embodiment of the present invention.

[0020] Figure label:

[0021] 1. Wall structure; 2. Sandwich color steel insulation panel; 3. Electromagnetic adsorption device; 4. Magnetic strip; 5. Adhesive. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] This invention provides a method for installing sandwich-type color steel insulation panels in industrial cold storage, comprising the following steps:

[0025] S1. Clean and level the base layer of the cold storage wall 1, and lay a moisture-proof and vapor-proof membrane after leveling.

[0026] Clean and level the base of the cold storage wall, lay a high-polymer moisture-proof and vapor-barrier membrane, and use hot-melt welding at the joints, extending to the edge of the ground.

[0027] Before construction, a laser leveling instrument must be used to inspect the wall base to ensure that the flatness error is less than 3mm / 2m. Any local protrusions should be ground down with an angle grinder until they are flush with the reference surface.

[0028] The moisture-proof and vapor-barrier membrane is made of 0.8mm thick cross-laminated polymer film, with a tensile strength at break greater than 25MPa and a moisture permeability less than 0.02g / (m²). 2 •h). During installation, the overlap width of the moisture-proof vapor barrier membrane should be no less than 80mm. Welding should be performed using a 400℃ constant-temperature electric welding gun, ensuring a continuous weld without bubbles. After welding, a negative pressure tester should be used to check the airtightness of the weld at -500Pa pressure. The edge of the moisture-proof vapor barrier membrane should be extended 150mm up along the wall base and fixed using stainless steel pressure strips and nails, with a nail spacing of no more than 200mm.

[0029] S2. Measure and lay out the lines on the wall and pre-embed laser positioning reflective sheets at the four corners of the wall.

[0030] Using a total station, spatial three-dimensional coordinate layout is carried out, the axis and elevation control lines of the color steel plate are displayed, and laser positioning reflective sheets are pre-embedded at the four corners.

[0031] A spatial coordinate system was established using a 0.5-second total station. Laser control lines were projected based on the coordinate points of the BIM model, with axis deviation controlled within ±1.5mm. The elevation baseline was verified using an electronic level, with an elevation control point set every 10m, and the cumulative error not exceeding 2mm. Positioning reflectors were made of prism-grade reflective material with a diameter of 30mm and a pre-embedded depth of 10mm. The coordinates of the center points of the four corner reflectors needed to deviate from the theoretical values ​​by less than 1mm. After the layout was completed, a 3D scanner was used for reverse verification, and the point cloud data needed to match the design model 1 with a degree of over 98%.

[0032] Based on the BIM model nesting of special parts such as pipe holes and equipment interfaces, the irregular-shaped color steel plates are prefabricated using a CNC plasma cutting machine. Specifically, the 3D data of the irregular components is extracted based on the BIM model. The CNC cutting machine uses a 200A plasma cutting head, with the cutting speed set at 3m / min, and the perpendicularity error of the cut is less than 0.5mm. For curved plates with a curvature radius of less than 300mm, a multi-point bending machine is used to progressively form them in 6 sections, with the forming angle error not exceeding 0.3°. When the diameter of the prefabricated hole is greater than 100mm, a reinforcing frame is added. The frame is made of 1.5mm thick galvanized steel strip cold-bent, with a riveting spacing of 50mm, and the center deviation of the hole position is controlled within ±1mm.

[0033] A steel reinforcement frame was installed at the cold storage door opening, secured with chemical anchors, and the gaps were filled with polyurethane foam. The specific steps included: the door frame was constructed from 80×80×4mm hot-dip galvanized square tubing, welded to a depth of 3mm and subjected to penetrant testing. M12 chemical anchors were used, with a drilling depth of 120mm. The curing time after installation was no less than 45 minutes, and the pull-out force test value was greater than 25kN. The polyurethane foam was injected using a high-pressure caulking gun, with a foam density set at 45±5kg / m³. 3 The injection pressure is 0.6MPa. After expansion, the excess material is cut off and polished to be flush with the surface of the door frame. The void rate at the joint is less than 5% when tested with a probe.

[0034] S3. Reception grooves are respectively opened on the two adjacent sides of the sandwich color steel insulation panel 2.

[0035] S4. Fill the receiving groove with magnetic strip 4 and inject adhesive 5 to seal it.

[0036] S5. Reference Figure 1As shown, multiple sandwich-type color steel insulation panels 2 are laid sequentially on the wall. When laying the next sandwich-type color steel insulation panel, one adjacent side of the next sandwich-type color steel insulation panel is aligned with one adjacent side of the previous sandwich-type color steel insulation panel to form a joint. Then, one side of the electromagnetic adsorption device 3 is magnetically adsorbed onto the outside of the previous sandwich-type color steel insulation panel, and the other side of the electromagnetic adsorption device is magnetically adsorbed onto the outside of the next sandwich-type color steel insulation panel, so that the outside of the previous sandwich-type color steel insulation panel is precisely aligned with the outside of the next sandwich-type color steel insulation panel.

[0037] In this embodiment, the magnetic adhesive strip includes an adhesive strip body and neodymium iron boron permanent magnet particles embedded in the adhesive strip body. The adhesive is a modified polyurethane adhesive.

[0038] In a preferred embodiment, with the electromagnetic adsorption device magnetically adsorbed onto two adjacent sandwich color steel insulation panels, stainless steel self-tapping screws are used to penetrate the folded edges of the two adjacent sandwich color steel insulation panels and pre-tightened to a torque of 20 N·m to form a temporary mechanical connection; low-temperature elastic silicone sealant is injected into the joint; polyurethane sealant is applied to the outside of the joint; and the electromagnetic adsorption device is removed after the low-temperature elastic silicone sealant has dried to the surface.

[0039] In step S5, the material selection for the magnetic strip is as follows: a double-layer composite magnetic rubber strip is used, with the outer layer being low-temperature resistant EPDM rubber (temperature resistance -50℃) and the inner layer embedding neodymium iron boron permanent magnet particles (magnetic permeability ≥1.2T). The cross-sectional dimensions of the rubber strip are 12mm × 8mm, and it is pre-pressed into a U-shaped groove structure. A groove (groove depth 10mm, width 14mm) is cut on the adjacent side of the sandwich color steel insulation panel, and the magnetic rubber strip is embedded in the groove. Modified polyurethane adhesive (curing time ≤3 minutes) is evenly injected along the groove opening using a hot melt glue gun, and simultaneously pressed firmly with a pressure plate tool to ensure that the rubber strip is flush with the panel.

[0040] In this embodiment, a programmable electromagnetic adsorption device (operating voltage 24V, magnetic field strength adjustable from 0.8 to 1.5T) is used. A vacuum suction cup is installed at the bottom of the electromagnetic adsorption device, and a laser alignment emitter (accuracy ±0.5mm) is integrated at the top. The electromagnetic adsorption device is adsorbed onto the adjacent side of the fixed sandwich color steel insulation panel. After the device is activated, the magnetic field penetrates the magnetic rubber strips of the adjacent panels, generating attraction.

[0041] The magnetic field strength is adjusted to 1.2T by remote control, so that the color steel plate to be installed is instantly attracted to the target position. The laser alignment device projects a cross line to the reflector on the opposite wall, and the plate is finely adjusted until the laser overlaps. After the adsorption is stable, the gap between the plates automatically shrinks to ≤0.3mm, and the verticality deviation is ≤1mm / 3m.

[0042] In the adsorption state, stainless steel self-tapping screws (Φ5.5×50mm, 300mm spacing) are used to penetrate the double-sided folded edge and pre-tightened to a torque of 20 N·m to form a temporary mechanical connection. Low-temperature elastic silicone sealant (flow index ≤5mm, elongation ≥400%) is injected along the inside of the joint, with the glue gun nozzle tilted at 45° and moved at a uniform speed, ensuring a glue filling depth ≥8mm. On the outside, two-component polyurethane sealant (A / B component ratio 1:1) is applied in an arc shape, with a layer thickness of 3–5mm, covering the self-tapping screw heads.

[0043] Maintain electromagnetic adsorption during curing until the silicone sealant is surface dry (approximately 15 minutes), then turn off the magnetic field and remove the device.

[0044] After removing the electromagnetic adsorption device, use a laser positioning instrument to re-measure the straightness of the joint (allowable deviation ±1mm) and the flatness of the board surface (2m straightedge gap ≤1.5mm). Before the sealant cures, use a feeler gauge to check the joint gap. For any areas that exceed the tolerance, restart the electromagnetic adsorption for fine-tuning until the standard is met.

[0045] S6. A pressure roller is used to roll the seam lock strip along the length of the joint to form a continuous mechanical interlocking structure, and sealant is injected simultaneously.

[0046] The locking strip is made of 0.6mm thick galvanized steel strip pre-pressed into an Ω-shaped cross section. The pressure roller has a diameter of 150mm. During rolling, a linear pressure of 300N is applied to make the locking edge engagement depth reach 4mm.

[0047] The sealant uses nano-modified aerogel slurry with a thermal conductivity of ≤0.023W / (m·K). It is preheated to 40℃ before injection to improve fluidity. The amount of sealant injected is precisely measured at 120g per meter of the seal length.

[0048] Within 24 hours after construction, use a feeler gauge to check the gap at the interlocking parts. The gap at any point in the entire joint should not exceed 0.2mm. Randomly select 10% of the section for a water pressure penetration test. The section should withstand 0.1MPa water pressure without leakage.

[0049] Vacuum insulation panels were wrapped around the beam-column junctions, covered with an aluminum foil composite layer, and the thermal bridge elimination effect was detected using an infrared thermal imager.

[0050] The vacuum insulation panel is 20mm thick with a thermal conductivity ≤0.008W / (m·K). After cutting, the edges are coated with a special interface agent. A dot-matrix bonding process is used on the contact surface with beams and columns, with an adhesive coverage of no less than 80%. The aluminum foil composite layer is hot-melt pressed on one side with an overlap width of 100mm. The seams are connected with conductive tape, and the resistance value is tested to be less than 0.1Ω. During infrared detection, the temperature difference inside the chamber is set at 15℃, the thermal imager resolution must reach 0.05℃, and the area of ​​abnormal temperature rise must not exceed 0.5% of the total detection area.

[0051] S7. After the block laying is completed and the cold storage is sealed, turn on the eddy current leak detector to detect leaks by pressure difference method, and confirm the sealing level with thermal smoke visualization test.

[0052] Specifically, the eddy current leak detector is set to a detection sensitivity of 0.5cm. 3 The pressure difference between the inside and outside of the storage chamber is maintained at 500 Pa for 30 minutes, and the pressure drop rate must not exceed 5 Pa / min. For the smoke test, vegetable oil-based particles with a particle size of 1–3 μm are used, with smoke generation calculated at 0.1 g per cubic meter of storage volume. No visible escape smoke is observed for 30 minutes under 10 lux illumination. When a leak is detected, a fluorescent tracer is used to assist in localization. After repair, the test is repeated until the CL50 sealing rating specified in ISO 9001 is achieved.

[0053] S8. After confirming the sealing level, spray an anti-condensation nano-coating on the outside of the sandwich color steel insulation panel and install a distributed fiber optic sensor network to monitor the temperature strain and sealing performance of the sandwich color steel insulation panel in real time.

[0054] The anti-condensation coating thickness is controlled between 0.2 and 0.3 mm. After the wet film cures, it must pass a contact angle test, with a water droplet angle greater than 110°. Fiber optic sensors are deployed in a 3×3m grid, with a single fiber length not exceeding 80m. Temperature measurement accuracy is ±0.2℃, and strain resolution is 1με. The monitoring system sampling frequency is set to 1Hz, and the data anomaly threshold is set to a temperature gradient > 2℃ / m or a strain mutation > 50με. The real-time alarm signal delay does not exceed 0.5 seconds.

[0055] The installation method for sandwich-type color steel insulation panels in industrial cold storage of this invention significantly improves construction accuracy and efficiency through innovative splicing technology using an electromagnetic adsorption device. This method utilizes the synergistic effect of pre-embedded magnetic strips and the electromagnetic adsorption device, enabling millimeter-level automatic alignment of the sandwich-type color steel insulation panels during splicing, completely avoiding the deformation or misalignment problems caused by traditional manual hammering adjustments. The uniform distribution of electromagnetic force by the electromagnetic adsorption device ensures that the joint gap is stably controlled within 0.3 mm. Combined with the double filling of low-temperature elastic silicone sealant, a continuous sealing layer without cold bridges is formed, fundamentally eliminating the risk of cold air leakage.

[0056] The installation method for sandwich-type color steel insulation panels in industrial cold storage of this invention replaces manual fine-tuning with mechanized operation, significantly shortening the splicing time while ensuring that the verticality and flatness of the panels meet industrial-grade precision standards. The composite application of magnetic materials and structural adhesive (low-temperature elastic silicone sealant) not only strengthens the shear strength of the joints, but its built-in magnetic rubber layer also acts as a dynamic compensation unit, maintaining stable sealing performance under temperature stress. This technological breakthrough elevates the overall airtightness of the cold storage enclosure structure to a new level, providing reliable assurance for long-term stable operation in ultra-low temperature environments.

[0057] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for installing sandwich-type color steel insulation panels in industrial cold storage, characterized in that, Includes the following steps: Clean and level the base layer of the cold storage wall, and then lay a moisture-proof and vapor-barrier membrane after leveling; Measure and lay out the lines on the wall; Reception grooves are respectively opened on the two adjacent sides of the sandwich color steel insulation panel; Magnetic adhesive strips are filled into the receiving groove and then encapsulated with adhesive. Multiple sandwich-type color steel insulation panels are sequentially laid on the wall. When laying the next sandwich-type color steel insulation panel, one adjacent side of the next sandwich-type color steel insulation panel is aligned with one adjacent side of the previously laid sandwich-type color steel insulation panel to form a joint. Then, one side of the electromagnetic adsorption device is magnetically adsorbed onto the outside of the previous sandwich-type color steel insulation panel, and the other side of the electromagnetic adsorption device is magnetically adsorbed onto the outside of the next sandwich-type color steel insulation panel, so that the outside of the previous sandwich-type color steel insulation panel is precisely aligned with the outside of the next sandwich-type color steel insulation panel. A pressure roller is used to roll the seam guard strip along the length of the joint to form a continuous mechanical interlocking structure, and sealant is injected simultaneously.

2. The installation and construction method of sandwich color steel insulation panels for industrial cold storage according to claim 1, characterized in that, It also includes, after the cold storage is sealed after the blocks are laid, turning on the eddy current leak detector to detect leaks by pressure difference method, and confirming the sealing level with thermal smoke visualization test.

3. The installation method for sandwich-type color steel insulation panels in industrial cold storage according to claim 2, characterized in that, After confirming the sealing level, an anti-condensation nano-coating is sprayed onto the outer side of the sandwich color steel insulation panel, and a distributed fiber optic sensor network is installed to monitor the temperature strain and sealing performance of the sandwich color steel insulation panel in real time.

4. The installation method for sandwich-type color steel insulation panels in industrial cold storage according to claim 1, characterized in that, The magnetic adhesive strip includes an adhesive strip body and neodymium iron boron permanent magnet particles embedded in the adhesive strip body.

5. The installation and construction method of sandwich color steel insulation panels for industrial cold storage according to claim 4, characterized in that, The adhesive is a modified polyurethane adhesive.

6. The installation method for sandwich-type color steel insulation panels in industrial cold storage according to claim 1, characterized in that, With the electromagnetic adsorption device magnetically adsorbed onto two adjacent sandwich color steel insulation panels, stainless steel self-tapping screws are used to penetrate the folded edges of the two adjacent sandwich color steel insulation panels and pre-tightened to a torque of 20 N·m to form a temporary mechanical connection; low-temperature elastic silicone sealant is injected into the joint; and polyurethane sealant is applied to the outside of the joint. Remove the electromagnetic adsorption device after the low-temperature elastic silicone sealant has dried to the surface.

Images