Heat-preservation and energy-saving type assembly modular building structure

Abstract

The invention discloses a heat preservation and energy saving type assembly modular building structure, and relates to the technical field of building energy saving. The heat-preservation and energy-saving type assembly modular building structure comprises modular wallboard units, each modular wallboard unit sequentially comprises a concrete panel, a modified polyurethane foam layer, a vacuum insulation panel layer and a graphite polystyrene board from outside to inside, all the layers are fixed through glass fiber reinforced plastic rib plates, PVC pipeline grooves are pre-buried in the rib plates, and the modular wallboard units further comprise three-section type connecting pieces, the three-section type connecting piece comprises a stainless steel outer section, a PA66 + 40% carbon fiber composite material interruption section and a glass fiber reinforced epoxy resin inner section. According to the modular wallboard, a four-layer gradient structure of the concrete panel, the PUR heat preservation layer, the VI P super heat insulation layer and the GPS inner layer is adopted, and the FRP rib plate orthogonal grid support is combined, so that the unification of efficient heat insulation and structural strength is realized; the connecting piece adopts a three-section composite design of a stainless steel outer section, a PA66 interruption section and an epoxy resin inner section, and the aerogel heat insulation layer and the spiral water guide groove are combined, so that the problems of heat bridge and leakage of a traditional connecting piece are solved.

Description

Technical Field

[0001] The invention relates to the technical field of building energy conservation, and in particular to a modular building structure with heat-insulating thermal insulation and efficient assembly characteristics. Background Art

[0002] Existing prefabricated buildings generally use metal connectors to penetrate the insulation layer (such as patent CN110670958A). The thermal conductivity of stainless steel or aluminum alloy connectors is as high as 16 to 50 W / (m·K), forming a significant linear thermal bridge. Heat is quickly transferred through the connection nodes, resulting in an increase of 30% to 50% in the overall heat transfer coefficient of the wall, which seriously weakens the insulation performance. In addition, the traditional wall insulation layer is interrupted at the joints (such as direct connection of XPS boards), and the heat flow diffuses densely at the nodes. The measured energy loss in the thermal bridge area accounts for more than 20%;

[0003] Modular wall panel joint treatment mostly relies on on-site glue injection or mechanical compression (such as patent CN201910662995.0); however, sealants are prone to cracking due to ultraviolet aging, and leakage occurs when the joint displacement exceeds ±2mm under thermal expansion and contraction stress; more seriously, the existing joint structure does not integrate active drainage design, and condensed water penetrates into the insulation layer along the connector, causing the polyurethane foam material to become damp and powdery, and the thermal insulation performance decreases by 40% when the water absorption rate is greater than 5%;

[0004] Traditional rapid assembly technology often sacrifices node accuracy and functionality in pursuit of construction speed; for example, patent CN13056076A uses welding to fix connectors, which takes more than 15 minutes for a single node, and high-temperature operations destroy the integrity of the insulation layer. Summary of the invention

[0005] The purpose of the present invention is to solve the contradiction between thermal bridge effect, joint leakage and construction efficiency and thermal insulation performance in modular buildings.

[0006] To achieve the above object, the present invention provides the following technical solution: a heat-insulating and energy-saving assembled modular building structure, comprising a modular wall panel unit, which is composed of a concrete panel (thickness 50±1mm, C30 concrete, embedded with Φ6@150mm steel mesh), a modified polyurethane foam layer (thickness 80±1mm, density 45kg / m 3 , thermal conductivity 0.020W / (m·K)), vacuum insulation board layer (thickness 20±0.5mm, thermal conductivity ≤0.008W / (m·K)) and graphite polystyrene board (thickness 20±0.5mm, thermal conductivity 0.030W / (m·K)), each layer is fixed by glass fiber reinforced plastic ribs (section 25×60mm, spacing 600±2mm), and PVC pipeline troughs (section 10×8mm, notch rounded corners R1mm) are embedded in the ribs;

[0007] It also includes a three - section connector. The three - section connector includes a stainless - steel outer section (diameter Φ18±0.1mm, length 60±0.5mm, with surface galvanized treatment), a PA66 + 40% carbon fiber composite middle section (outer diameter Φ24±0.1mm, inner diameter Φ18±0.05mm, length 80±0.5mm, with spiral water - guiding grooves on the surface, pitch 30±0.2mm, groove depth 3±0.1mm), and a glass - fiber - reinforced epoxy resin inner section (diameter Φ14±0.1mm, length 60±0.5mm, with anchoring barbs on the surface, barb height 3±0.1mm, spacing 10±0.2mm). An aerogel layer (thickness 3±0.1mm, thermal conductivity ≤0.016W / (m·K)) is filled between the middle section and the stainless - steel outer section;

[0008] It also includes a joint system. The joint system includes a two - way wedge - shaped groove (outer opening width 12±0.2mm, inner opening width 8±0.2mm, depth 15±0.3mm, inclination angle 8°±0.5°), an FRP fastener (T - shaped cross - section, head width 10±0.2mm, clamping depth 12±0.2mm, with an internal spring steel sheet, pre - pressure 50±5N, spacing 250±5mm), and a Z - shaped polyether - ether - ketone heat - insulating strip (cross - section 12×8±0.2mm, thermal conductivity 0.25W / (m·K)). The joint gap is 5±0.5mm, and a self - expanding ethylene propylene diene monomer rubber sealing strip (pre - compression rate 30±2%, expanded height 6±0.3mm) is filled.

[0009] Preferably, a 10±0.5mm inert gas gap is provided between the modified polyurethane foam layer and the vacuum insulation panel layer, filled with argon (purity ≥99.99%), and connected by nylon 66 support columns (diameter Φ5±0.1mm, height 10±0.2mm, arranged in a 200±5mm×200±5mm grid pattern). The compressive strength of the support columns is ≥15MPa, and the thermal conductivity is ≤0.3W / (m·K).

[0010] Preferably, the stainless - steel outer section is connected to the PA66 middle section by an M16×2mm standard thread, with a thread fit tolerance grade of 6H / 6g. The aerogel layer covers the thread meshing area and the end - face contact area, and the edge of the aerogel is processed with an R1±0.1mm fillet. The density of the aerogel is 180±10kg / m 3 and the specific surface area is 800±50m2 / g.

[0011] Preferably, the surface of the epoxy resin inner section is sand - blasted (roughness Ra50±5μm), the anchoring barbs are conical, the bottom diameter is 2±0.1mm, and an epoxy structural adhesive (bonding strength ≥3.0MPa, curing time ≤30 minutes) is filled between the barbs and the graphite polystyrene board.

[0012] Preferably, the compression set rate of the self - expanding seal strip is ≤15% (tested at 70°C for 24 hours), the working temperature range is - 40°C to 120°C, and the linear expansion coefficient is 8×10 -5 / °C. The seal strip contains dispersed micro - capsule flame retardants (particle size 50±5μm, flame retardant efficiency ≥30%).

[0013] Preferably, the drainage holes (diameter Φ6±0.1mm) at the end of the water guide groove are connected to the building water collection system through a Φ20±0.5mm PVC drainage pipe. The slope of the drainage pipe is 3±0.5%, and a stainless - steel filter screen (mesh number 80±5 meshes) is installed at the pipe orifice.

[0014] Preferably, the edges of the PVC pipeline groove in the FRP rib plate are rounded with a radius of R1±0.1mm. The inner wall of the groove is coated with an abrasion - resistant coating (thickness 0.2±0.02mm, friction coefficient ≤0.15). Rubber buffer sleeves (hardness 60±5 Shore A) are installed at both ends of the pipeline groove.

[0015] Preferably, the contact surface of the connecting piece is coated with a micro - capsule self - healing coating (thickness 0.1±0.02mm, capsule diameter 50±5μm, core material is two - component epoxy resin, wall material is polyurethane, rupture pressure 0.5±0.05MPa), and the weather resistance of the coating is ≥2000 hours (QUV test).

[0016] Preferably, the standard size of the wall panel unit is 3000±2mm×2500±2mm×200±1.5mm. The horizontal spacing of the splicing fasteners is 600±2mm, the allowable tolerance in the vertical direction is ±1mm, and lifting nuts (M20, strength grade 8.8) are pre - embedded at the four corners of the wall panel.

[0017] The core design of the present invention:

[0018] 1. Four - layer gradient thermal insulation wall panel: outer protective layer (concrete) - main thermal insulation layer (PUR) - super - adiabatic layer (VIP) - inner protective layer (GPS), forming a stepped thermal resistance;

[0019] 2. Three - section intelligent connecting piece: metal section (load - bearing) - composite broken - bridge section (heat insulation + drainage) - anchoring section (self - healing);

[0020] 3. Five - fold joint sealing system: mechanical fastener (structural fixation) + broken - bridge strip (heat blockage) + self - expanding seal strip (airtightness) + water guide groove (moisture - proof).

[0021] Compared with the prior art:

[0022] 1) The modular wall panel of the present invention adopts a four - layer gradient structure of "concrete panel - PUR thermal insulation layer - VIP super - adiabatic layer - GPS inner layer", combined with the orthogonal grid support of FRP rib plates, realizing the unity of high - efficiency heat insulation and structural strength:

[0023] Thermal resistance gradient optimization: The PUR layer (λ = 0.020 W / (m·K)) and the VIP layer (λ ≤ 0.008 W / (m·K)) form a stepped thermal resistance, significantly extending the heat transfer path. The overall heat transfer coefficient of the wall ≤ 0.15 W / (m 2 ·K), a 57% reduction compared to the traditional single insulation layer (λ = 0.035 W / (m·K));

[0024] Thermal bridge blocking: The FRP rib plate (λ = 0.3 W / (m·K)) and the transverse heat insulation strip (λ = 0.25 W / (m·K)) are orthogonally arranged to block the linear thermal bridge, reducing the energy consumption loss in the thermal bridge area by 75%;

[0025] Enhanced structural stability: The FRP rib plate (tensile strength ≥ 500 MPa) and the concrete panel (C30) jointly bear the load, increasing the flexural stiffness of the wall panel by 40%, suitable for high-rise buildings.

[0026] 2) The connector adopts a three-section composite design of "stainless steel outer section - PA66 middle section - epoxy resin inner section", combined with an aerogel heat insulation layer and a spiral water guide groove, solving the thermal bridge and leakage problems of traditional connectors:

[0027] Excellent heat insulation performance: The combination of the PA66 section (λ = 0.18 W / (m·K)) and the aerogel layer (λ ≤ 0.016 W / (m·K)) makes the overall heat transfer coefficient of the connector ≤ 0.12 W / (m 2 ·K), a 90% reduction compared to metal connectors (1.2 W / (m 2 ·K));

[0028] Active drainage and moisture-proof: The spiral water guide groove (pitch 30 mm) and the drainage hole (Φ6 mm) lead the condensate water to the embedded PVC pipe, avoiding moisture in the insulation layer (moisture content ≤ 3%) and extending the service life;

[0029] Reliable mechanical properties: The stainless steel outer section (tensile strength ≥ 500 MPa) and the epoxy inner section (bonding strength ≥ 3.0 MPa) jointly bear the load, and the shear strength of the connector ≥ 90 MPa, meeting the load requirements of high-rise buildings.

[0030] 3) The joint system of the present invention adopts a triple sealing design of "wedge-shaped groove buckle + Z-shaped heat bridge strip + self-expanding rubber strip", solving the problems of easy cracking and difficult maintenance of traditional joints:

[0031] Improved airtightness: The combination of the self-expanding rubber strip (pre-compression rate 30%) and the Z-shaped heat bridge strip (λ = 0.25 W / (m·K)) makes the airtightness of the joint reach 0.5 m 3 / (h·m 2 ), a 60% improvement compared to the traditional glue-injected joint (1.2 m 3 / (h·m2));

[0032] Enhanced deformation adaptability: A telescopic gap of 5 ± 0.5 mm is reserved and combined with a highly elastic sealing strip, which can adapt to a thermal displacement of ±3 mm, and the crack rate is reduced to less than 5%.

[0033] High construction efficiency: The FRP fasteners (spacing 250 mm) and the wedge-shaped grooves (inclination angle 8°) enable rapid alignment and installation. The time-consuming for a single node is ≤5 minutes, and the efficiency is increased by 40% compared with traditional welding (15 minutes / node). Description of the Drawings

[0034] The present invention will be further described below in conjunction with the drawings and embodiments:

[0035] Figure 1 It is the exploded structure diagram of the present invention;

[0036] Figure 2 It is the three-dimensional diagram of the present invention;

[0037] Figure 3 It is the structure diagram of the present invention;

[0038] Figure 4 It is the enlarged view of part A of the present invention;

[0039] Figure 5 It is the enlarged view of part B of the present invention;

[0040] Figure 6 It is the top view of the present invention;

[0041] Figure 7 It is the A-A cross-sectional view of the present invention;

[0042] Figure 8 It is the front view of the present invention;

[0043] Figure 9 It is the B-B cross-sectional view of the present invention.

[0044] Reference numerals: 1, concrete panel; 2, modified polyurethane foam layer; 3, vacuum insulation panel layer; 4, graphite polystyrene board; 5, glass fiber reinforced plastic rib plate; 6, anti-crack groove; 7, embedded PVC pipeline groove; 8, transverse groove; 9, transverse heat insulation strip; 10, water guide groove; 11, drain hole; 12, PA66 interruption section; 13, stainless steel outer section; 14, glass fiber reinforced epoxy resin inner section. Detailed Embodiments

[0045] Please refer to Figures 1-9, a heat-insulating and energy-saving assembled modular building structure, including modular wallboard units, which from outside to inside are successively a concrete panel 1 (with a thickness of 50 ± 1 mm, C30 concrete, embedded with a Φ6@150 mm steel mesh), a modified polyurethane foam layer 2 (with a thickness of 80 ± 1 mm, density 45 kg / m 3 , thermal conductivity 0.020 W / (m·K)), a vacuum insulation panel layer 3 (with a thickness of 20 ± 0.5 mm, thermal conductivity ≤ 0.008 W / (m·K)) and a graphite polystyrene board 4 (with a thickness of 20 ± 0.5 mm, thermal conductivity 0.030 W / (m·K)). Each layer is fixed by a glass fiber-reinforced plastic rib plate 5 (section 25×60 mm, spacing 600 ± 2 mm). A PVC pipeline groove 7 (section 10×8 mm, chamfered at the notch with a radius of R1 mm) is embedded in the rib plate; it also includes a three-section connector. The three-section connector includes a stainless steel outer section 13 (diameter Φ18 ± 0.1 mm, length 60 ± 0.5 mm, surface galvanized treatment), a PA66 + 40% carbon fiber composite middle section 12 (outer diameter Φ24 ± 0.1 mm, inner diameter Φ18 ± 0.05 mm, length 80 ± 0.5 mm, with a spiral water guide groove on the surface, pitch 30 ± 0.2 mm, groove depth 3 ± 0.1 mm) and a glass fiber-reinforced epoxy resin inner section 14 (diameter Φ14 ± 0.1 mm, length 60 ± 0.5 mm, with anchoring barbs on the surface, barb height 3 ± 0.1 mm, spacing 10 ± 0.2 mm). An aerogel layer (thickness 3 ± 0.1 mm, thermal conductivity ≤ 0.016 W / (m·K)) is filled between the middle section 12 and the stainless steel outer section 13; it also includes a joint system. The joint system includes a two-way wedge-shaped groove 10 (outer opening width 12 ± 0.2 mm, inner opening width 8 ± 0.2 mm, depth 15 ± 0.3 mm, inclination angle 8° ± 0.5°), an FRP fastener (T-shaped section, head width 10 ± 0.2 mm, clamping depth 12 ± 0.2 mm, with a built-in spring steel sheet, pre-pressure 50 ± 5 N, spacing 250 ± 5 mm) and a Z-shaped polyether ether ketone heat insulation strip (section 12×8 ± 0.2 mm, thermal conductivity 0.25 W / (m·K)). The joint gap is 5 ± 0.5 mm, filled with a self-expanding ethylene propylene diene monomer rubber sealing strip (pre-compression rate 30 ± 2%, expanded height 6 ± 0.3 mm). The standard size of the wallboard unit is 3000 ± 2 mm × 2500 ± 2 mm × 200 ± 1.5 mm. The horizontal spacing of the joint fasteners is 600 ± 2 mm, and the vertical tolerance is ±1 mm. Lifting nuts (M20, strength grade 8.8) are embedded at the four corners of the wallboard.

[0046] Preferably, a 10±0.5 mm inert gas gap is provided between the modified polyurethane foam layer and the vacuum insulation panel layer, filled with argon (purity ≥99.99%), and connected by nylon 66 support columns (diameter Φ5±0.1 mm, height 10±0.2 mm, spaced 200±5 mm×200±5 mm in a grid pattern). The compressive strength of the support columns is ≥15 MPa, the thermal conductivity is ≤0.3 W / (m·K). The stainless steel outer section 13 and the PA66 intermediate section 12 are connected by an M16×2 mm standard thread, and the thread fit tolerance grade is 6H / 6g. The aerogel layer covers the threaded engagement area and the end face contact area, and the edge of the aerogel is processed with an R1±0.1 mm fillet. The density of the aerogel is 180±10 kg / m 3 , the specific surface area is 800±50 m 2 / g. The surface of the inner section of the epoxy resin is sandblasted (roughness Ra50±5 μm). The anchoring barbs are conical, with a bottom diameter of 2±0.1 mm. An epoxy structural adhesive (bonding strength ≥3.0 MPa, curing time ≤30 minutes) is filled between the barbs and the graphite polystyrene board. The compression set rate of the self-expanding sealant strip is ≤15% (tested at 70°C×24 h), the working temperature range is -40°C to 120°C, and the linear expansion coefficient is 8×10 -5 / °C. Microcapsule flame retardants (particle size 50±5 μm, flame retardancy efficiency ≥30%) are dispersed in the rubber strip.

[0047] Preferably, the drain hole 11 (diameter Φ6±0.1 mm) at the end of the water guide groove 10 is connected to the building water collection system through a Φ20±0.5 mm PVC drain pipe. The slope of the drain pipe is 3±0.5%, and a stainless steel filter screen (mesh number 80±5 meshes) is installed at the pipe orifice. The edges of the PVC pipeline groove in the FRP rib plate 5 are rounded with an R1±0.1 mm fillet, and the inner wall of the groove is coated with a wear-resistant coating (thickness 0.2±0.02 mm, friction coefficient ≤0.15). Rubber buffer sleeves (hardness 60±5 Shore A) are installed at both ends of the pipeline groove. The contact surface of the connector is coated with a microcapsule self-healing coating (thickness 0.1±0.02 mm, capsule diameter 50±5 μm, core material is two-component epoxy resin, wall material is polyurethane, rupture pressure 0.5±0.05 MPa). The weather resistance of the coating is ≥2000 hours (QUV test).

[0048] Example 1: Manufacture of wall panel units

[0049] 1. Prefabrication of concrete panels:

[0050] C30 concrete is used, with a cold-rolled ribbed steel mesh of Φ6@150 mm inside. Anti-cracking grooves (depth 5 mm×width 10 mm, spacing 500 mm) are pre-set in the formwork;

[0051] After steam curing to a strength of 30 MPa, demoulding is carried out, and a silane impregnating agent (penetration depth ≥3 mm) is sprayed on the surface.

[0052] 2. Thermal insulation layer composite:

[0053] PUR layer pouring: Spray rigid polyurethane foam (density 45 ± 2 kg / m 3 ) on the inner side of the concrete panel, with a foaming ratio of 35:1 and a cured thickness of 80 ± 1 mm;

[0054] VIP layer installation: Fix a 20-mm-thick vacuum insulation panel (with a core material of fumed silica and an outer aluminum foil composite film) on the inner side of the PUR layer through nylon support columns (Φ5 mm, compressive strength 15 MPa), with a spacing of 10 ± 0.5 mm;

[0055] GPS layer bonding: Bond a 20-mm-thick graphite polystyrene board to the VIP layer using polyurethane structural adhesive (bonding strength ≥ 2.0 MPa).

[0056] 3. FRP rib implantation:

[0057] Insert FRP ribs with a cross-section of 25 mm × 60 mm (tensile modulus 25 GPa) into the PUR layer before it cures, with a rib spacing of 600 ± 2 mm, and embed 15 mm at both ends into the concrete panel;

[0058] Pre-open a 10-mm × 8-mm channel in the rib, insert a Φ16-mm PVC wire pipe, and then fill the gap with foaming glue.

[0059] Example 2: Connector assembly

[0060] 1. Outer section processing:

[0061] Turn an M16 × 60-mm threaded rod from a 316 stainless steel bar, galvanize the surface (thickness 20 μm), and the tensile strength ≥ 500 MPa;

[0062] Machine a Φ6-mm anchor bolt hole at the rod end, inject epoxy resin adhesive for rebar planting, and then insert it into the concrete panel.

[0063] 2. Bridge section manufacturing:

[0064] Injection mold a PA66 + 40% carbon fiber composite material (melt temperature 290 °C), with an outer diameter of Φ24 ± 0.1 mm and an inner diameter of Φ18 ± 0.05 mm;

[0065] CNC machine a spiral water guide groove (pitch 30 ± 0.2 mm, groove depth 3 ± 0.1 mm), and drill a Φ6-mm drain hole (angle 45° ± 1°) at the end.

[0066] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A thermal insulation and energy-saving assembled modular building structure, characterized in that: include: The modular wall panel unit, from outside to inside, consists of a concrete panel (1) (thickness 50±1mm, C30 concrete, embedded with Φ6@150mm steel mesh), a modified polyurethane foam layer (2) (thickness 80±1mm, density 45kg / m 3 , thermal conductivity 0.020W / (m·K)), vacuum insulation board layer (3) (thickness 20±0.5mm, thermal conductivity ≤0.008W / (m·K)) and graphite polystyrene board (4) (thickness 20±0.5mm, thermal conductivity 0.030W / (m·K)), each layer is fixed by glass fiber reinforced plastic ribs (5) (section 25×60mm, spacing 600±2mm), and PVC pipeline troughs (7) (section 10×8mm, notch rounded corners R1mm) are pre-buried in the ribs; The three-section connector comprises a stainless steel outer section (13) (diameter Φ18±0.1mm, length 60±0.5mm, surface galvanized), a PA66+40% carbon fiber composite interruption section (12) (outer diameter Φ24±0.1mm, inner diameter Φ18±0.05mm, length 80±0.5mm, spiral water guide grooves on the surface, pitch 30±0.2mm, groove depth 3±0.1mm) and a glass fiber reinforced epoxy resin inner section (14) (diameter Φ14±0.1mm, length 60±0.5mm, anchor barbs on the surface, barb height 3±0.1mm, spacing 10±0.2mm), an aerogel layer (thickness 3±0.1mm, thermal conductivity ≤0.016W / (m·K)) is filled between the interruption section (12) and the stainless steel outer section (13); The splicing system comprises a bidirectional wedge-shaped groove (10) (opening width outer end 12±0.2mm, inner end 8±0.2mm, depth 15±0.3mm, tilt angle 8°±0.5°), an FRP clip (T-shaped cross section, head width 10±0.2mm, insertion depth 12±0.2mm, internal spring steel sheet, preload 50±5N, spacing 250±5mm) and a Z-shaped polyetheretherketone thermal bridge strip (cross section 12×8±0.2mm, thermal conductivity 0.25W / (m·K)), a splicing gap of 5±0.5mm, and a self-expanding EPDM rubber sealing strip (pre-compression rate 30±2%, height after expansion 6±0.3mm).

2. The heat-insulating and energy-saving assembled modular building structure according to claim 1, characterized in that: An inert gas gap of 10±0.5 mm is set between the modified polyurethane foam layer and the vacuum insulation board layer, which is filled with argon gas (purity ≥99.99%) and connected by nylon 66 support columns (diameter Φ5±0.1 mm, height 10±0.2 mm, spacing 200±5 mm×200±5 mm grid arrangement), and the compressive strength of the support columns is ≥15 MPa, and the thermal conductivity is ≤0.3 W / (m·K).

3. The heat-insulating and energy-saving assembled modular building structure according to claim 2 is characterized by: The stainless steel outer section (13) is connected to the PA66 interruption section (12) through a M16×2mm standard thread, the thread matching tolerance grade is 6H / 6g, the aerogel layer covers the thread engagement area and the end face contact area, the aerogel edge is processed with R1±0.1mm fillet, and the aerogel density is 180±10kg / m 3 , specific surface area 800±50m 2 / g.

4. The heat-insulating and energy-saving assembled modular building structure according to claim 3 is characterized by: The surface of the epoxy resin inner section is sandblasted (roughness Ra50±5μm), the anchor barb is conical, the bottom diameter is 2±0.1mm, and epoxy structural adhesive (bonding strength≥3.0MPa, curing time≤30 minutes) is filled between the barb and the graphite polystyrene plate.

5. The heat-insulating and energy-saving assembled modular building structure according to claim 4 is characterized by: The compression permanent deformation rate of the self-expanding sealing strip is ≤15% (70℃×24h test), the working temperature range is -40℃~120℃, and the linear expansion coefficient is 8×10 -5 / ℃, microcapsule flame retardant (particle size 50±5μm, flame retardant efficiency ≥30%) is dispersed in the rubber strip.

6. The heat-insulating and energy-saving assembled modular building structure according to claim 5, characterized in that: The drainage hole (11) (diameter Φ6±0.1mm) at the end of the water guide groove (10) is connected to the building water collection system through a Φ20±0.5mm PVC drainage pipe. The slope of the drainage pipe is 3±0.5%, and a stainless steel filter (mesh size 80±5 mesh) is provided at the pipe mouth.

7. The heat-insulating and energy-saving assembled modular building structure according to claim 6 is characterized by: The edges of the PVC pipeline trough inside the FRP rib plate (5) are rounded to R1±0.1mm, the inner wall of the trough is coated with a wear-resistant coating (thickness 0.2±0.02mm, friction coefficient ≤0.15), and rubber buffer sleeves (hardness 60±5Shore A) are provided at both ends of the pipeline trough.

8. The heat-insulating and energy-saving assembled modular building structure according to claim 7 is characterized by: The contact surface of the connector is coated with a microcapsule self-repairing coating (thickness 0.1±0.02 mm, capsule diameter 50±5 μm, core material is two-component epoxy resin, wall material is polyurethane, rupture pressure 0.5±0.05 MPa), and the weather resistance of the coating is ≥2000 hours (QUV test).

9. The heat-insulating and energy-saving assembled modular building structure according to claim 8, characterized in that: The standard size of the wall panel unit is 3000±2mm×2500±2mm×200±1.5mm, the horizontal spacing of the joint fasteners is 600±2mm, the vertical tolerance is ±1mm, and the four corners of the wall panel are pre-embedded with lifting nuts (M20, strength grade 8.8).

Images