Outer wall autoclaved aerated concrete self-insulation structure

Abstract

The utility model relates to the technical field of outer wall heat preservation, in particular to an outer wall autoclaved aerated concrete self-heat-preservation structure which comprises a prefabricated slab made of autoclaved aerated concrete, a heat bridge breaking connecting assembly and an interface sealing layer. Horizontal through-length grooves and vertical positioning convex ribs are arranged in the prefabricated slabs, matching grooves connected with the positioning convex ribs in a matched mode are formed in the adjacent prefabricated slabs, and compact layers of 5-8 mm are formed on the surfaces of the prefabricated slabs through high-pressure steam curing. The connecting assembly comprises an embedded part and a nylon heat insulation sleeve, and the embedded part is arranged on the wall body, penetrates through the groove in the plate body and abuts against the side wall of the groove through the heat insulation sleeve; and the interface sealing layer is filled at the joint of the adjacent plate bodies and is uniformly coated on the surface of the prefabricated plate. The heat preservation device has the effect of improving the heat preservation effect.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of external wall heat preservation, and in particular to an external wall autoclaved aerated concrete self-heat preservation structure. BACKGROUND

[0002] At present, with the popularization of the green building concept and the rapid development of fabricated buildings, the design and construction of external wall heat preservation structures pay more and more attention to the lightweight, environmental protection, fire prevention and heat preservation performance of materials. Autoclaved aerated concrete, as a kind of lightweight porous material, is widely used in building external wall structures due to its good heat preservation and insulation, fire resistance, lightweight and environmental protection.

[0003] In the prior art, a profiled metal plate lining autoclaved aerated concrete plate composite fireproof external wall is disclosed in Chinese Patent No. CN221001508U, which comprises an external wall autoclaved aerated concrete plate arranged on the outer side of a main structure steel column, a profiled metal lining plate arranged on the inner side of the external wall autoclaved aerated concrete plate, and a glass wool heat preservation layer and a profiled metal external wall plate arranged in sequence on the outer side; the profiled metal external wall plate and the profiled metal lining plate are fixed by self-tapping screws and horizontal C-shaped wall purlins; the self-tapping screws are connected with the profiled metal external wall plate, heat conduction is easy to occur, heat is easily transferred outwards, heat loss is caused, and the heat preservation effect is poor. SUMMARY

[0004] In order to improve the heat preservation effect, the application provides an external wall autoclaved aerated concrete self-heat preservation structure.

[0005] The external wall autoclaved aerated concrete self-heat preservation structure provided by the application adopts the following technical scheme:

[0006] An external wall autoclaved aerated concrete self-heat preservation structure comprises a prefabricated plate made of autoclaved aerated concrete, a heat break bridge connecting assembly and an interface sealing layer.

[0007] The prefabricated plate is internally provided with a horizontal and lengthwise groove and a vertical positioning convex rib, and a matching groove matched with the positioning convex rib is arranged on the adjacent prefabricated plate; the surface of the prefabricated plate is formed with a 5-8mm dense layer through high-pressure steam curing;

[0008] The connecting assembly comprises a pre-embedded part and a nylon heat insulation sleeve, the pre-embedded part is arranged on the wall body and penetrates the groove on the plate body, and the pre-embedded part is abutted with the side wall of the groove through the heat insulation sleeve;

[0009] The interface sealing layer is filled in the joint between the adjacent plate bodies and is uniformly coated on the surface of the prefabricated plate.

[0010] By adopting the technical scheme, the prefabricated slab is precisely assembled and positioned through the horizontal groove and the vertical rib; when the galvanized embedded part penetrates the groove of the prefabricated slab, the nylon sleeve is in close contact with the side wall of the groove to form a physical broken bridge; the interface sealing layer adopts a double sealing process of filling the joint first and then coating to reduce heat dissipation; the matching groove and the rib structure improve the assembly accuracy (the error can be controlled within ±1.5 mm); the nylon sleeve blocks the heat conduction of the metal connecting piece (the heat transfer coefficient of the measured heat bridge part is reduced by 62%); the composite sealing layer realizes that the air tightness grade of the joint reaches Q4 level; through the above settings, the heat of the wall is reduced to transfer to the outside of the wall, the heat conduction probability is reduced through the setting of the physical broken bridge, the internal heat is preserved for a long time, the heat preservation time is prolonged, and at the same time, the external heat is reduced to transfer to the wall, the internal temperature is prevented from rising too fast, and the heat preservation effect is improved.

[0011] Optionally, the connecting assembly further comprises a limiting part, which is rotatable or detachable on the embedded part and can abut against the side of the prefabricated slab away from the wall.

[0012] By adopting the technical scheme, after the embedded part is installed in place, the limiting part is screwed or clamped to a predetermined position; the outer surface of the limiting part is flush with the outer facade of the prefabricated slab; mechanical limiting prevents the connecting piece from shrinking under stress (the pull-out force is increased to more than 2.8 kN); the detachable design facilitates later maintenance and replacement; and local stress concentration caused by exposed bolt heads is eliminated.

[0013] Optionally, a rotating groove is formed in the prefabricated slab, the rotating groove is communicated with the groove, and the limiting part is sunk into the rotating groove.

[0014] By adopting the technical scheme, after the limiting part is rotated into the rotating groove, the top of the limiting part is sunk into the surface of the prefabricated slab by 2-3 mm; a special tool is used to adjust the angle of the limiting part; the hidden design avoids that the protruding component damages the flatness of the wall; the rotating groove guides the precise positioning of the limiting part (the angle deviation is less than or equal to 1°); the leveling process during the construction of the decorative layer is reduced; and at the same time, the limiting part and the rotating groove reduce the heat conduction between the embedded part and the prefabricated slab, form a partition, and make the prefabricated slab closely fit the wall, reduce the loss of heat, and improve the heat preservation effect.

[0015] Optionally, an anti-cracking reinforcing layer is arranged outside the interface sealing layer.

[0016] By adopting the technical scheme, the glass fiber mesh is pressed into the not completely solidified waterproof mortar base layer; a continuous anti-cracking layer is formed by secondary troweling; the fiber mesh inhibits shrinkage cracks (the crack occurrence rate is reduced by 85%); the thermal expansion coefficient of the composite structure layer matches the ALC plate body (the temperature difference deformation is less than or equal to 0.3 mm / m); the waterproof mortar layer realizes that the joint resistance pressure is greater than or equal to 0.6 MPa; and through the setting of the thick glass fiber mesh, the occurrence of cracks is reduced, and the heat preservation effect is maintained.

[0017] Optionally, a clamping groove is formed on the limiting part, and a connecting assembly is arranged between adjacent limiting parts, the connecting assembly comprising a connecting rod, both ends of the connecting rod being respectively connected with two adjacent limiting parts and clamped in the corresponding clamping groove, and the connecting rod being in abutment with the prefabricated slab.

[0018] By adopting the above technical scheme, the connecting rod is inserted into the clamping groove of the adjacent limiting part, and the prefabricated slab is pressed by the lever principle; a continuous force transmission path is formed (the shear strength of the joint is improved to 0.25 MPa); the clamping structure realizes rapid assembly (the time consumed for single node installation is less than 30 seconds); local deformation caused by traditional point connection is eliminated; and the connecting rod is arranged to form force transmission between the plurality of prefabricated slabs, thereby improving the overall stability and resisting the wall to reduce heat loss.

[0019] Optionally, the connecting assembly further comprises a fixing rod and a locking rod, the fixing rod being arranged on the connecting rod, and the locking rod being slidable on the fixing rod and located on the side of the limiting part away from the connecting rod.

[0020] By adopting the above technical scheme, the fixing rod is axially adjusted in position along the connecting rod, and the locking rod is inserted into the reserved hole of the prefabricated slab to complete the final fixation; the three-dimensional adjustable structure is adapted to a construction error of ±5 mm; the double locking mechanism prevents the connection from loosening (the displacement amount is less than 0.1 mm under vibration test); the sliding design allows micro deformation of the structure (the maximum allowable displacement is 3 mm); and the connecting assembly improves the stability of the connecting rod and strongly restricts the prefabricated slab, thereby improving the connection stability between the prefabricated slab and the wall.

[0021] Optionally, the abutment part of the connecting rod and the prefabricated slab is bent towards the prefabricated slab.

[0022] By adopting the above technical scheme, the connecting rod is embedded into the surface of the prefabricated slab, the bending angle is controlled in the range of 15-30°; the contact area is increased to reduce the pressure (the contact stress is reduced by 40%); the bending structure forms elastic buffering (the impact load absorption rate is improved by 35%); the sharp corners are avoided to damage the ALC slab body; the abutting force of the middle part is greater than that of the two sides; the uneven contact between the prefabricated slab and the wall is reduced; and the heat preservation effect is maintained.

[0023] Optionally, an abutment groove is formed on the prefabricated slab, and the abutment groove is adapted to the curvature of the connecting rod.

[0024] By adopting the above technical scheme, the abutment groove is arranged to limit the displacement of the connecting rod, facilitate positioning and installation of the connecting rod, and reduce the stress coefficient.

[0025] Optionally, the embedded part is reserved with an installation slot, a caulking pipe is connected in the installation slot, and a pipe head of the caulking pipe extends to the limiting part.

[0026] By adopting the technical scheme, the caulking pipe is inserted into the embedded part installation slot and fixed, and the epoxy resin is injected into the micro gap through the grouting gun; the connection node is secondarily reinforced (the tensile strength is improved by 80% after grouting), the micro hole of the metal-concrete interface is closed (the water vapor permeability is reduced by 92%), the pipe head extension design ensures that the grout filling degree is greater than or equal to 95%, the caulking pipe is arranged, the caulking work is facilitated, the internal hollowing is reduced, the connection between the prefabricated slab and the wall body is more stable and compact, and the heat transfer is reduced, so that the heat preservation effect is maintained.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. By the above arrangement, the heat of the wall body is reduced to the outside of the wall body, the heat conduction probability is reduced by the arrangement of the physical broken bridge, the internal heat is maintained for a long time, the heat preservation time is prolonged, the external heat is reduced to the wall body, the internal temperature is prevented from rising too fast, and the heat preservation effect is improved;

[0029] 2. The caulking pipe is arranged, the caulking work is facilitated, the internal hollowing is reduced, the connection between the prefabricated slab and the wall body is more stable and compact, and the heat transfer is reduced, so that the heat preservation effect is maintained. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a relative position relationship diagram of the prefabricated slab and the outer wall in the embodiment of the present application;

[0031] Figure 2 is a splicing diagram of two adjacent prefabricated slabs in the embodiment of the present application;

[0032] Figure 3 is Figure 1 an enlarged view of A in

[0033] Figure 4 is a top view of the connecting assembly in the embodiment of the present application;

[0034] Figure 5 is a display diagram of the connecting assembly in the embodiment of the present application;

[0035] Figure 6 is a display diagram of the connecting rod in the embodiment of the present application.

[0036] 100, prefabricated plate; 110, groove; 120, positioning rib; 130, matching groove; 140, rotating groove; 150, abutting groove; 200, connecting assembly; 210, embedded part; 220, nylon heat insulation sleeve; 230, limiting part; 231, straight rod section; 232, limiting section; 233, clamping groove; 300, interface sealing layer; 400, anti-cracking reinforcing layer; 500, outer wall; 600, connecting assembly; 610, connecting rod; 620, fixed rod; 630, locking rod; 700, crack pouring pipe. DETAILED DESCRIPTION

[0037] The following Figures 1 to 6 The application is further described in detail.

[0038] The embodiment discloses an outer wall autoclaved aerated concrete self-insulation structure.

[0039] Embodiment 1: Referring to Figure 1 , the outer wall 500 autoclaved aerated concrete self-insulation structure comprises: a connecting assembly 200, a prefabricated plate 100 and an interface sealing layer 300 and an anti-cracking reinforcing layer 400 which are sequentially abut on the wall body, the prefabricated plate 100 is formed by autoclaved aerated concrete, the connecting assembly 200 is partially embedded in the wall body and is heat-insulatedly connected with the prefabricated plate 100, thereby reducing heat transmission.

[0040] Referring to Figure 2 and Figure 3 , the autoclaved aerated concrete prefabricated plate 100 is a rectangular modular component, a plurality of horizontal through grooves 110 are formed on the prefabricated plate 100, the grooves 110 are equally spaced along the length direction of the prefabricated plate 100 and penetrate through the prefabricated plate 100, and the width of the groove 110 is 40 mm; a vertical positioning rib 120 is fixedly connected to one side of the prefabricated plate 100, the positioning rib 120 is arranged along the height direction of the prefabricated plate 100, the cross section of the positioning rib 120 is trapezoidal, the height of the positioning rib 120 is 20 mm, the top width of the positioning rib 120 is 15 mm, and a plurality of positioning ribs 120 are arranged along the height direction of the prefabricated plate 100 at equal intervals; a matching groove 130 is formed on the side of the prefabricated plate 100 away from the positioning rib 120, the matching groove 130 is formed corresponding to the positioning rib 120 and is complementary in shape, and a 2 mm assembly gap is reserved at the groove bottom, so that the positioning rib 120 and the matching groove 130 are clamped.

[0041] When assembling, the positioning rib 120 of the adjacent prefabricated plate 100 is inserted into the matching groove 130, vertical and horizontal positioning is realized through the engagement of the positioning rib 120 and the matching groove 130, and the horizontal groove 110 is used for accommodating the connecting assembly 200.

[0042] The connecting assembly 200 comprises a galvanized steel embedded part 210, wherein the galvanized steel embedded part 210 comprises an anchoring section fixed on or embedded in the outer wall 500 of the building structure by an expansion bolt, an integral connecting section provided at one end of the anchoring section away from the outer wall 500, the connecting section penetrating through the horizontal groove 110 of the prefabricated slab 100, an outer surface sleeving a nylon heat insulation sleeve 220 with a wall thickness of 5 mm and a gap of less than or equal to 0.5 mm with the side wall of the groove 110; one threaded ring is integrally provided at one end of the connecting section away from the anchoring section, a connecting bolt is threaded and connected through the threaded ring, and the end of the threaded ring away from the connecting section is rotationally connected with a limiting part 230, the limiting part 230 comprises a straight rod section 231 and a limiting section 232, the straight rod section 231 is in contact with the threaded ring, the connecting bolt is threaded and connected through the straight rod section 231 and the threaded ring, and a heat insulation and insulation pad is arranged at the abutting position of the connecting bolt and the straight rod section 231, the limiting section 232 has an outer diameter greater than the width of the groove 110 and less than the length of the groove 110, can penetrate through the groove 110, and is rotated after penetrating through the groove 110, and then the connecting bolt is tightened. In order to facilitate the hiding of the limiting section 232, a rotating groove 140 is formed on the surface of the prefabricated slab 100, the rotating groove 140 has a depth of 3 mm and a diameter of 2 mm larger than the limiting section 232, the rotating groove 140 is in communication with the groove 110, the limiting section 232 is located at the rotating groove 140, and is flush with or lower than the outer surface of the prefabricated slab 100 after being tightened.

[0043] The embedded part 210 is implanted into the building structure outer wall 500, the prefabricated slab 100 is hoisted to the predetermined position, the connecting section is penetrated into the horizontal groove 110, and the limiting part 230 is rotated until it is sunk into the rotating groove 140 on the surface of the prefabricated slab 100.

[0044] An installation groove is formed on the vertical side wall of the connecting section, a caulking pipe 700 is inserted into the installation groove and is bonded with the installation groove, the caulking pipe 700 is arranged along the outer wall 500 and is provided with a plurality of pouring holes, the pipe head extends to the inside of the limiting part 230 by 2 mm and is exposed with the rotation of the limiting section 232, and the epoxy resin slurry is injected to fill the micro gap.

[0045] Referring to Figure 4 , Figure 5 and Figure 6In order to increase the connection strength of the prefabricated slab 100, the straight rod section 231 of the limiting part 230 is provided with a connecting assembly 600, the connecting assembly 600 comprises a connecting rod 610, the middle part of the connecting rod 610 is bent to form an arc-shaped rod, the prefabricated slab 100 is provided with an abutting groove 150, the abutting groove 150 is matched with the connecting rod 610; the straight rod section 231 is provided with a clamping groove 233, the clamping groove 233 corresponds to the end of the connecting rod 610, the end of the connecting rod 610 is fixedly connected with a fixing rod 620, the fixing rod 620 is located on the side of the connecting rod 610 clamped in the clamping groove 233 close to the middle part, the fixing rod 620 is perpendicular to the end of the connecting rod 610, and a long hole is formed in the rod body of the end of the fixing rod 620 away from the connecting rod 610, a locking rod 630 is slidably connected in the long hole, and the long hole allows the locking rod 630 to slide along the hole axis by ±5mm; the locking rod 630 abuts against the side of the connecting section away from the connecting rod 610 after sliding out of the long hole, and the abutting surface is not smooth.

[0046] The two ends of the connecting rod 610 are clamped into the clamping grooves 233 of the adjacent limiting parts 230, and the bent section of the connecting rod 610 is embedded in the abutting groove 150; the locking rod 630 is slid to abut against the side of the connecting section away from the connecting rod 610.

[0047] The nylon sleeve and the galvanized embedded part 210 are provided with supports to form an air interlayer, the inside is filled with insulating material, and the thickness of the interlayer is 3mm, which effectively reduces the heat transfer coefficient of the metal part to 0.8W / (m·K).

[0048] The joint treatment of the adjacent prefabricated slabs 100 comprises: an expansion sealing strip is embedded in the joint of the adjacent prefabricated slabs 100, the sealing strip is a Φ10mm rubber sealing strip, the sealing strip is pressed into the bottom of the joint, the compression rate is controlled to be 30%-40%, and the sealing strip is bonded on the prefabricated slab 100 by bonding; on the side of the prefabricated slab 100 away from the outer wall 500, a polymer modified cement-based slurry is coated on the joint to form an interface sealing layer 300 in cooperation with the sealing strip, and when the joint is coated, a special grouting gun is used for layered filling until the joint is filled, and after the last layer is filled, the outer surface of the prefabricated slab 100 is coated as a whole, and the next process is carried out after curing for 24 hours.

[0049] When the interface sealing layer 300 is formed, a 0.6mm thick glass fiber mesh is laid on the surface of the interface sealing layer 300, and the lap width is ≥80mm; then 3-5mm thick waterproof mortar is applied and pressed, and polypropylene fibers (doping amount 1.2kg / m³) are mixed in the mortar. The light is collected before final setting. The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. An external wall (500) autoclaved aerated concrete self-insulation structure, characterized in that: The application relates to a prefabricated panel (100) made of autoclaved aerated concrete, a heat-insulating bridge connecting assembly (200) and an interface sealing layer (300). The prefabricated panel (100) is internally provided with a horizontal and lengthwise groove (110) and vertical positioning convex ribs (120), adjacent prefabricated panels (100) are provided with matching grooves (130) matched with the positioning convex ribs (120), and the surface of the prefabricated panel (100) is formed with a 5-8mm dense layer through high-pressure steam curing. The connecting assembly (200) comprises a pre-embedded part (210) and a nylon heat-insulating sleeve (220), the pre-embedded part (210) is arranged on a wall body and penetrates the groove (110) on the panel body and abuts against the side wall of the heat-insulating sleeve and the groove (110). The interface sealing layer (300) is filled in the joint between adjacent panel bodies and uniformly coated on the surface of the prefabricated panel (100). The connecting assembly (200) further comprises a limiting part (230), the limiting part (230) is rotatable on or detachable from the pre-embedded part (210) and can abut against the side of the prefabricated panel (100) away from the wall body.

2. The exterior wall (500) autoclaved aerated concrete self-heat preservation structure according to claim 1, characterized in that: The prefabricated panel (100) is provided with a rotating groove (140), the rotating groove (140) is communicated with the groove (110) and enables the limiting part (230) to sink into the rotating groove (140).

3. The exterior wall (500) autoclaved aerated concrete self-heat preservation structure according to claim 2, characterized in that: The interface sealing layer (300) is provided with an anti-cracking reinforcing layer (400) outside.

4. The exterior wall (500) autoclaved aerated concrete self-heat preservation structure according to claim 2, characterized in that: The limiting part (230) is provided with a clamping groove (233), adjacent limiting parts (230) are provided with a connecting assembly (600), the connecting assembly (600) comprises a connecting rod (610), the two ends of the connecting rod (610) are respectively corresponded to two adjacent limiting parts (230) and clamped in the corresponding clamping grooves (233), and the connecting rod (610) abuts against the prefabricated panel (100).

5. The external wall (500) autoclaved aerated concrete self-heat preservation structure according to any one of claims 2-4, characterized in that: The connecting assembly (600) further comprises a fixing rod (620) and a locking rod (630), the fixing rod (620) is arranged on the connecting rod (610), and the locking rod (630) slides on the fixing rod (620) and is located on the side of the limiting part (230) away from the connecting rod (610).

6. The exterior wall (500) autoclaved aerated concrete self-heat preservation structure according to claim 5, characterized in that: The abutting position of the connecting rod (610) and the prefabricated panel (100) is bent towards the prefabricated panel (100).

7. The exterior wall (500) autoclaved aerated concrete self-heat preservation structure according to claim 5, characterized in that: The prefabricated panel (100) is formed with an abutting groove (150), the abutting groove (150) is matched with the curvature of the connecting rod (610).

8. The exterior wall (500) autoclaved aerated concrete self-heat preservation structure according to claim 5, characterized in that: The pre-embedded part (210) is provided with a mounting groove, a caulking pipe (700) is clamped in the mounting groove, and the pipe head of the caulking pipe (700) extends to the limiting part (230).

9. The exterior wall (500) autoclaved aerated concrete self-heat preservation structure according to claim 2, characterized in that: ​

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