Fabricated node structure and construction method thereof
By using airtight connection components and thermal insulation connection components in prefabricated buildings, the continuity problem between the thermal insulation layer and the airtight layer in the node area is solved, achieving high airtightness and high thermal insulation, reducing energy consumption and improving the durability and safety of the building.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI CONSTRUCTION FIRST CONSTRUCTION (GROUP) CO LTD
- Filing Date
- 2026-03-26
- Publication Date
- 2026-06-05
Smart Images
Figure CN122147985A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of prefabricated building technology, and in particular to a prefabricated node structure and its construction method. Background Technology
[0002] Prefabricated buildings, with their technological advantages of standardized design, factory production, assembly construction, and information-based management, have been widely promoted and applied in the modern construction field. In prefabricated building systems, the insulation and airtight layers integrated into the components effectively block heat transfer and inhibit air infiltration. The synergistic effect of these two elements can significantly reduce the overall energy consumption of the building and improve energy-saving performance.
[0003] However, in actual construction, the connection of precast components is mostly completed on-site, and cast-in-place concrete is commonly used to connect them into a whole. This makes it difficult to achieve continuous connection between the insulation layer and the airtight layer in the joint area. Discontinuities in the insulation layer can easily create a thermal bridge effect, significantly accelerating heat loss from the building; discontinuities in the airtight layer can exacerbate the intrusion of cold outdoor air, causing fluctuations in indoor temperature. These problems not only significantly increase the overall energy consumption of the building and reduce its energy-saving performance, but also adversely affect the long-term durability and safety of the building structure.
[0004] Therefore, there is an urgent need for a prefabricated node structure and its construction method to solve the above problems. Summary of the Invention
[0005] The purpose of this invention is to provide a prefabricated node structure and its construction method, which effectively avoids air leakage and thermal bridging, reduces the overall energy consumption of prefabricated buildings, and improves the durability and safety of prefabricated buildings.
[0006] To achieve this objective, the present invention adopts the following technical solution: Firstly, a prefabricated node structure is provided, including: The first precast component and the second precast component are both provided with a thermal insulation layer and an airtight layer; An airtight connection assembly is disposed at the connection between the first precast component and the second precast component, and the airtight layer of the first precast component is sealed to the airtight layer of the second precast component through the airtight connection assembly. An insulation connection assembly is disposed at the connection between the first precast component and the second precast component, and the insulation layer of the first precast component is connected to the insulation layer of the second precast component through the insulation connection assembly.
[0007] Optionally, the thermal insulation connection assembly includes a thermal insulation connector, one end of which is connected to the thermal insulation layer of the first precast component, and the other end of which is connected to the thermal insulation layer of the second precast component.
[0008] Optionally, the thermal insulation connection assembly includes a thermal insulation element, the thermal conductivity of which is less than that of concrete; the thermal insulation element is sandwiched between the first precast component and the second precast component, and the surface of the first precast component contacts the surface of the second precast component through the thermal insulation element; or, a post-cast zone is provided between the first precast component and the second precast component, and the first precast component contacts the cast-in-place concrete in the post-cast zone, as do the second precast component and the cast-in-place concrete in the post-cast zone, through the thermal insulation element.
[0009] Optionally, the thermal insulation connection assembly also includes a thermal break sleeve connected to the thermal insulation component. Both the first precast component and the second precast component are provided with thermal break sleeves. The prefabricated node structure also includes a metal penetrating component, which passes through the post-cast area and the thermal insulation component and extends to the first precast component or the second precast component. The thermal break sleeve is fitted onto part of the metal penetrating component.
[0010] Optionally, joint spaces are formed at the connection between the airtight connection component and the airtight layer, as well as at the connection between the thermal insulation connection component and the thermal insulation layer. The joint spaces between the airtight connection component and the airtight layer are not coaxial with the joint spaces between the thermal insulation connection component and the thermal insulation layer. The prefabricated node structure also includes a sealing component, which is used to seal the joint spaces.
[0011] Optionally, the sealing assembly includes a sealing block, an expansion filler, and a sealing filler. The sealing block is installed in the joint space, and the expansion filler and the sealing filler are filled between the sealing block and the sidewall of the joint space. The expansion filler expands after filling.
[0012] Optionally, the airtight connection assembly includes an airtight connector, one end of which is connected to the airtight layer of the first prefabricated component, and the other end of which is connected to the airtight layer of the second prefabricated component.
[0013] Optionally, the second precast component is provided with an installation groove that extends to the airtight layer of the second precast component. One end of the airtight connector is fixedly connected to the airtight layer of the first precast component, and the other end of the airtight connector is embedded in the installation groove and sealed to the groove wall.
[0014] Optionally, the airtight connection assembly also includes an airtight coating applied between the outer wall of the airtight connection and the wall of the mounting groove.
[0015] Secondly, a construction method for prefabricated node structures is provided, applicable to the prefabricated node structures of the first aspect, comprising the following steps: S1. Produce the first and second prefabricated components in the factory; S2. Transport the first and second precast components to the construction site and hoist them to their corresponding installation positions; S3. Connect the first precast component and the second precast component. The insulation layer of the first precast component is connected to the insulation layer of the second precast component through an insulation connection assembly. The airtight layer of the first precast component is connected to the airtight layer of the second precast component through an airtight connection assembly. S4. Check the airtightness and thermal insulation performance of the connection between the first precast component and the second precast component.
[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a prefabricated joint structure and its construction method. The airtight connection component connects the airtight layers of the first and second prefabricated components into a whole, ensuring the continuity of airtightness at the joint, effectively preventing air leakage, reducing indoor temperature fluctuations, lowering the overall energy consumption of the prefabricated building, and improving its durability and safety. The thermal insulation connection component connects the thermal insulation layers of the first and second prefabricated components into a whole, ensuring the continuity of thermal insulation at the joint, effectively preventing thermal bridging, preventing heat loss from the building, further reducing the overall energy consumption of the prefabricated building, and improving its durability and safety. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the first type of prefabricated node structure provided by the present invention; Figure 2 A schematic diagram of the prefabricated component and the second prefabricated component of the assembled node structure provided by the present invention when they are not connected; Figure 3 This is a schematic diagram of the second type of assembled node structure provided by the present invention; Figure 4 A schematic diagram of the third type of prefabricated node structure provided by the present invention; Figure 5 A flowchart of the prefabricated node structure construction method provided by the present invention.
[0018] In the picture: 110. First precast component; 120. Second precast component; 130. Metal penetrating component; 200. Airtight connection assembly; 210. Airtight connector; 220. Mounting slot; 300. Thermal insulation connection assembly; 310. Thermal insulation connector; 311. Thermal insulation connection plate; 312. Thermal insulation filler; 320. Thermal insulation component; 330. Thermal insulation sleeve; 410. Insulation layer; 420. Airtight layer; 500. Sealing components. Detailed Implementation
[0019] The present invention 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, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.
[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.
[0023] Example 1 like Figures 1 to 4 As shown, this embodiment provides a prefabricated node structure that effectively avoids air leakage and thermal bridging, reduces the overall energy consumption of prefabricated buildings, and improves the durability and safety of prefabricated buildings.
[0024] See Figure 1 and Figure 2The prefabricated node structure includes a first prefabricated component 110, a second prefabricated component 120, an airtight connection assembly 200, and a thermal insulation connection assembly 300. Both the first prefabricated component 110 and the second prefabricated component 120 are provided with a thermal insulation layer 410 and an airtight layer 420. The airtight connection assembly 200 is located at the connection between the first prefabricated component 110 and the second prefabricated component 120, and the airtight layer 420 of the first prefabricated component 110 is sealed to the airtight layer 420 of the second prefabricated component 120 through the airtight connection assembly 200. The thermal insulation connection assembly 300 is located at the connection between the first prefabricated component 110 and the second prefabricated component 120, and the thermal insulation layer 410 of the first prefabricated component 110 is connected to the thermal insulation layer 410 of the second prefabricated component 120 through the thermal insulation connection assembly 300.
[0025] The prefabricated node structure provided in this embodiment uses an airtight connection component 200 to connect the airtight layers 420 of the first prefabricated component 110 and the second prefabricated component 120 into a whole, ensuring the continuity of airtightness at the node, effectively preventing air leakage, reducing indoor temperature fluctuations, lowering the overall energy consumption of the prefabricated building, and improving the durability and safety of use of the prefabricated building. The thermal insulation connection component 300 connects the thermal insulation layers 410 of the first prefabricated component 110 and the second prefabricated component 120 into a whole, ensuring the continuity of thermal insulation at the node, effectively preventing thermal bridging, preventing heat loss from the building, further reducing the overall energy consumption of the prefabricated building, and improving the durability and safety of use of the prefabricated building.
[0026] By using the prefabricated node structure of this embodiment, prefabricated buildings can have the characteristics of high airtightness, high thermal insulation, and convenient construction, meeting the requirements of ultra-low energy consumption buildings and passive houses, and can be used in residential, public and commercial buildings.
[0027] In this embodiment, the first prefabricated component 110 includes, but is not limited to, walls, floors, beams, and columns, and its insulation layer 410 and airtight layer 420 are manufactured together with the main structure in the factory; the second prefabricated component 120 includes, but is not limited to, walls, floors, beams, and columns, and its insulation layer 410 and airtight layer 420 are manufactured together with the main structure in the factory; the prefabricated node structure includes, but is not limited to, splicing nodes between walls, connection nodes between walls and floors, and connection nodes between beams and columns.
[0028] Optionally, see Figure 3The thermal insulation connection assembly 300 includes a thermal insulation connector 310, one end of which is connected to the thermal insulation layer 410 of the first precast component 110, and the other end is connected to the thermal insulation layer 410 of the second precast component 120. This arrangement allows the thermal insulation layer 410 of the first precast component 110 to form a single unit with the thermal insulation layer 410 of the second precast component 120 through the thermal insulation connector 310, effectively preventing the generation of thermal bridging effects.
[0029] In some embodiments, see Figure 3 The thermal insulation connector 310 includes a thermal insulation connector plate 311. The thickness of the thermal insulation connector plate 311 is the same as the thickness of the thermal insulation layer 410. One end of the thermal insulation connector plate 311 is spliced to the end of the thermal insulation layer 410 of the first prefabricated component 110, and the other end is spliced to the thermal insulation layer 410 of the second prefabricated component 120, so as to achieve the continuity of thermal insulation at the node.
[0030] For example, the thermal insulation connecting plate 311 uses an airtight thermal insulation board, such as extruded polystyrene board, rigid polyurethane foam board, and expanded polystyrene board. The airtight thermal insulation board has both thermal insulation effect and high airtightness, which can simultaneously meet the dual requirements of thermal insulation and airtightness, avoiding thermal bridging and ventilation energy consumption.
[0031] Specifically, see Figure 3 At the joints between exterior walls, the insulation connection plate 311 can connect the insulation layers 410 on the outer sides of the two walls into a whole; see reference. Figure 4 At the connection node between the exterior wall and the floor, the insulation connection plate 311 is located at the floor height and can connect the insulation layers 410 of the two walls on the upper and lower floors into a whole; at the splicing node between sandwich insulation walls, the insulation connection plate 311 can connect the insulation layers 410 of the two walls into a whole.
[0032] For example, see Figure 3 For joints with post-cast zones, such as the splicing joints between exterior walls, during construction, after the concrete is poured in the post-cast zone, the insulation connection plate 311 is immediately installed at the post-cast zone and connected to the insulation layers 410 on both sides. It is ensured that the length of the insulation connection plate 311 along the wall extension direction is greater than the length of the post-cast zone along the wall extension direction to guarantee the continuity of insulation. Furthermore, the insulation connection plate 311 also serves as a protective structure, protecting the inner concrete and thus helping to extend the durability of the prefabricated joint structure.
[0033] In other embodiments, see Figure 3The thermal insulation connector 310 includes thermal insulation filler 312, which is filled between the thermal insulation layer 410 of the first precast component 110 and the thermal insulation layer 410 of the second precast component 120 to connect the thermal insulation layer 410 of the first precast component 110 and the thermal insulation layer 410 of the second precast component 120 into a whole, so as to ensure the continuity of thermal insulation at the joint.
[0034] The shape of the thermal insulation filler 312 can be flexibly changed according to the spatial shape between the thermal insulation layer 410 of the first precast component 110 and the thermal insulation layer 410 of the second precast component 120. Therefore, it can be used at weak points in the insulation caused by changes in thickness or complex construction, such as... Figure 3 The joint between the precast wall and the cast-in-place wall is shown.
[0035] Optionally, see Figure 1 The thermal insulation connection assembly 300 includes a thermal insulation element 320, the thermal conductivity of which is less than that of concrete. The thermal insulation element 320 is sandwiched between the first precast component 110 and the second precast component 120. The surface of the first precast component 110 is in contact with the surface of the second precast component 120 through the thermal insulation element 320. Alternatively, a post-cast zone is provided between the first precast component 110 and the second precast component 120. The first precast component 110 and the cast-in-place concrete in the post-cast zone, as well as the second precast component 120 and the cast-in-place concrete in the post-cast zone, are in contact through the thermal insulation element 320. When there is no post-cast zone between the first precast component 110 and the second precast component 120, the first precast component 110 can be directly connected to the second precast component 120. In this case, the insulation element 320 prevents the concrete of the first precast component 110 from directly contacting the concrete of the second precast component 120, effectively blocking the flow of heat between the concrete of the first precast component 110 and the second precast component 120. Consequently, heat can only be transferred between the first precast component 110 and the second precast component 120 through the insulation layer 410, thus significantly reducing the thermal bridge effect. When there is a post-cast zone between the first precast component 110 and the second precast component 120, both the first precast component 110 and the second precast component 120 are connected to the cast-in-place concrete in the post-cast zone. In this case, the insulation element 320 prevents the concrete of the first precast component 110 and the second precast component 120 from directly contacting the cast-in-place concrete, effectively blocking the flow of heat between the concretes, and still effectively reducing the thermal bridge effect.
[0036] For example, the thermal insulation element 320 is made of a material with low thermal conductivity, such as high-strength engineering plastics, special rubber concrete, etc.
[0037] Specifically, when the first precast component 110 is directly connected to the second precast component 120, the heat insulation component 320 is pre-embedded in the surface of the first precast component 110 during the production of the first precast component 110 and the second precast component 120, and a matching installation space is provided on the surface of the second precast component 120; subsequently, when assembling the first precast component 110 and the second precast component 120 at the construction site, the heat insulation component 320 can be installed into the installation space.
[0038] For example, see Figure 1 The thermal insulation element 320 in this embodiment can be used at nodes where through thermal bridges may occur, such as beam-column connection nodes.
[0039] In this embodiment, see Figure 1 The thermal insulation connection assembly 300 also includes a thermal break sleeve 330 connected to the thermal insulation component 320. Both the first precast component 110 and the second precast component 120 are equipped with thermal break sleeves 330. The prefabricated node structure also includes a metal penetrating component 130, which passes through the post-cast area and the thermal insulation component 320 and extends to the first precast component 110 or the second precast component 120. The thermal break sleeve 330 is fitted onto a portion of the metal penetrating component 130. The thermal conductivity of the thermal break sleeve 330 is lower than that of the metal penetrating component 130. This design prevents heat from being directly transferred from the first precast component 110 or the second precast component 120 to the cast-in-place concrete in the post-cast area through the metal penetrating component 130, effectively reducing heat loss at the metal penetrating component 130, lowering energy consumption, and ensuring that the prefabricated node structure meets the thermal requirements of ultra-low energy consumption buildings and passive houses.
[0040] For example, the metal through-hole 130 is a steel bar, and the thermal insulation sleeve 330 is made of a high-strength composite material, such as a glass fiber reinforced polymer.
[0041] For example, the thermal break sleeve 330 of this embodiment can be used in nodes where through thermal bridges may occur, such as beam-column connection nodes.
[0042] See Figure 1This prefabricated node structure is a beam-column connection node. The first prefabricated component 110 includes a beam, and the second prefabricated component 120 includes a column. A post-cast zone is provided at the connection between the beam and the column. The cast-in-place concrete in the post-cast zone is connected to the concrete of the beam through a heat insulation component 320, and the cast-in-place concrete in the post-cast zone is also connected to the concrete of the column through a heat insulation component 320. Multiple metal penetrating components 130 are provided. One part of the multiple metal penetrating components 130 has both ends located inside the column and passes through the cast-in-place concrete vertically. Both ends of the metal penetrating components 130 located inside the column are fitted with heat-insulating sleeves 330. Another part of the multiple metal penetrating components 130 has both ends located inside the beam and passes through the cast-in-place concrete horizontally. Both ends of the metal penetrating components 130 located inside the beam are fitted with heat-insulating sleeves 330.
[0043] In some embodiments, the thermal insulation connection assembly 300 further includes thermal insulation filler 312, which is filled between the thermal insulation layer 410 of the first prefabricated component 110 and the thermal insulation layer 410 of the second prefabricated component 120. The thermal insulation filler 312 can work synergistically with the thermal break sleeve 330 and the thermal insulation component 320 to significantly improve the thermal insulation and airtightness at the connection between the first prefabricated component 110 and the second prefabricated component 120, greatly reduce the overall energy consumption of the prefabricated building, and improve the durability and safety of the prefabricated building.
[0044] For example, see Figure 1 In this embodiment, the prefabricated node structure is a node that may generate through thermal bridges, such as a beam-column connection node.
[0045] Optionally, joint spaces are formed at the connections between the airtight connection component 200 and the first prefabricated component 110, the airtight connection component 200 and the airtight layer 420, and the thermal insulation connection component 300 and the thermal insulation layer 410. The joint spaces between the airtight connection component 200 and the airtight layer 420 are not coaxial with the joint spaces between the thermal insulation connection component 300 and the thermal insulation layer 410. The prefabricated node structure also includes a sealing component 500 for sealing the joint spaces. Even with the airtight connection component 200 and the thermal insulation connection component 300, the joint space remains a weak point in terms of airtightness and insulation. This design not only helps to further improve the overall airtightness and insulation of the prefabricated node structure but also prevents water from entering the room through the joint spaces, thus improving the overall waterproofness of the prefabricated node structure. The sealing component 500, together with the airtight connection component 200 and the thermal insulation connection component 300, effectively solves problems such as structural leakage, air leakage, and thermal bridging, significantly reducing the overall energy consumption of prefabricated buildings and improving their durability and safety. Furthermore, the overlapping arrangement of the airtight layer 420 and the thermal insulation layer 410 ensures that the joint space between the airtight connection component 200 and the airtight layer 420 is not coaxial with the joint space between the thermal insulation connection component 300 and the thermal insulation layer 410, further reducing the inflow of cold air and the loss of heat, thus further lowering the overall energy consumption of prefabricated buildings.
[0046] In this embodiment, the sealing component 500 includes a sealing block, an expansion filler, and a sealing filler. The sealing block is installed within the joint space. Both the expansion filler and the sealing filler fill the space between the sealing block and the sidewall of the joint space, and the expansion filler expands after filling. The sealing block can fill most of the joint space. After the expansion filler is filled, it can further seal the space between the sealing block and the sidewall of the joint space through expansion. The sealing filler can further fill and seal the pores that are not sealed by the sealing block and the expansion filler, thereby significantly improving the sealing effect of the joint space and ensuring the airtightness, thermal insulation, and waterproofness of the joint space.
[0047] Specifically, the sealing block is made of thermal insulation material and is located on the indoor side of the joint space. The sealing filler is made of waterproof material and is located on the outdoor side of the joint space. The expansion filler is made of airtight material and is mostly located between the sealing block and the sealing filler. This arrangement forms a thermal insulation layer, an airtight layer, and a waterproof layer arranged from the inside out, significantly reducing the overall energy consumption of prefabricated buildings and improving their durability and safety.
[0048] For example, the sealing block is made of rubber insulation material, the expansion filler is made of airtight membrane, and the sealing filler is made of silicone, polyurethane or sealant.
[0049] See Figure 1This prefabricated node structure is a beam-column connection node. The first prefabricated component 110 includes a crossbeam, and the second prefabricated component 120 includes a column. A post-cast area is provided at the connection between the crossbeam and the column. The insulation layer 410 and the airtight layer 420 of the crossbeam extend horizontally, and the insulation layer 410 and the airtight layer 420 of the column extend vertically. Joint spaces are formed between the insulation layer 410 of the crossbeam and the insulation layer 410 of the column, as well as between the airtight layer 420 of the crossbeam and the airtight layer 420 of the column. While avoiding thermal bridging between the column and the crossbeam through the thermal insulation component 320 and the thermal insulation sleeve 330, the above-mentioned joint spaces are sealed by the sealing component 500.
[0050] See Figure 3 This prefabricated node structure serves as a connection node between exterior walls. The first prefabricated component 110 includes an exterior wall, and the second prefabricated component 120 includes an exterior wall. A post-cast zone is provided at the connection point between the exterior walls. On the exterior wall facing outwards, from the inside to the outside, there is an insulation layer 410, an airtight layer 420, and a waterproof layer. On the exterior wall facing inwards, from the inside to the outside, there is an airtight layer 420 and an insulation layer 410. The airtight layer 420, located on the interior side, ensures airtightness while effectively preventing heat loss to the outside, thus improving the insulation effect of the exterior wall. Insulation filler 312 is filled between the concrete of both exterior walls and the cast-in-place concrete in the post-cast zone. An insulation connecting plate 311 is provided on the exterior side of the cast-in-place concrete in the post-cast zone. The two sides of the insulation connecting plate 311 are connected to the insulation layers 410 of the two exterior walls, and the joint space formed between them is sealed with a sealing component 500. In addition, sealing component 500 is used to seal the joint space between the airtight layer 420 and the waterproof layer of the two exterior walls.
[0051] See Figure 4 The prefabricated node structure is a connection node between the exterior wall and the floor slab. The first prefabricated component 110 includes the floor slab, and the second prefabricated component 120 includes the exterior wall. The insulation layers 410 of the upper and lower exterior walls are connected by an insulation connecting plate 311. The insulation layer 410 and the airtight layer 420 of the floor slab extend horizontally, while the insulation layer 410 and the airtight layer 420 of the exterior walls extend vertically. Joint spaces are formed between the insulation layer 410 of the exterior wall and the insulation layer 410 of the floor slab, between the airtight layer 420 of the exterior wall and the airtight layer 420 of the floor slab, between the airtight layers 420 of the upper and lower exterior walls, between the waterproof layers of the upper and lower exterior walls, and between the insulation connecting plate 311 and the outer ring insulation layer 410. The above-mentioned joint spaces are sealed by a sealing component 500.
[0052] Optionally, see Figure 2The airtight connection assembly 200 includes an airtight connector 210. One end of the airtight connector 210 is connected to the airtight layer 420 of the first prefabricated component 110, and the other end of the airtight connector 210 is connected to the airtight layer 420 of the second prefabricated component 120. This arrangement allows the airtight layers 420 of the first prefabricated component 110 and the airtight layers 420 of the second prefabricated component 120 to be connected as a whole through the airtight connector 210, improving the overall airtightness of the prefabricated node structure, thereby reducing the overall energy consumption of the prefabricated building and enhancing its durability and safety.
[0053] For example, taking the connection node between the wall and the floor as an example, the first prefabricated component 110 includes the wall, the second prefabricated component 120 includes the floor, and one end of the airtight connector 210 is connected to the wall and the other end is connected to the floor.
[0054] In this embodiment, see Figure 2 The second precast component 120 is provided with an installation groove 220, which extends to the airtight layer 420 of the second precast component 120. One end of the airtight connector 210 is fixedly connected to the airtight layer 420 of the first precast component 110, and the other end of the airtight connector 210 is embedded in the installation groove 220 and sealed to the groove wall of the installation groove 220. When connecting the first precast component 110 and the second precast component 120 on site, the connection of the airtight layer 420 of the first precast component 110 and the airtight layer 420 of the second precast component 120 can be achieved by embedding the other end of the airtight connector 210 into the installation groove 220. The operation is convenient and quick, which helps to improve construction efficiency.
[0055] Specifically, when the first prefabricated component 110 leaves the factory, the other end of the airtight connector 210 is suspended outside the first prefabricated component 110 and can move freely; when the second prefabricated component 120 leaves the factory, the mounting groove 220 has been machined on it; then, when connecting the first prefabricated component 110 and the second prefabricated component 120 on site, the other end of the airtight connector 210 can be directly embedded into the mounting groove 220.
[0056] For example, the airtight connector 210 adopts an elastic airtight strip. When the elastic airtight strip is embedded in the mounting groove 220, it will undergo elastic deformation, thereby allowing the outer wall of the airtight connector 210 to be squeezed against the groove wall of the mounting groove 220, which further improves the airtightness of the connection between the first prefabricated component 110 and the second prefabricated component 120.
[0057] In some embodiments, the airtight connection assembly 200 further includes an airtight coating applied between the outer wall of the airtight connector 210 and the groove wall of the mounting groove 220. The airtight coating allows the outer wall of the airtight connector 210 to fully contact and seal with the groove wall of the mounting groove 220, further improving the airtightness at the connection between the first prefabricated component 110 and the second prefabricated component 120, and reducing the overall energy consumption of the prefabricated building.
[0058] For example, the airtight coating uses an elastic sealing coating.
[0059] Example 2 like Figure 5 As shown, this embodiment provides a construction method for a prefabricated node structure, applicable to the prefabricated node structure of Embodiment 1, including the following steps: S1. Produce the first precast component 110 and the second precast component 120 in the factory.
[0060] Specifically, when producing the first prefabricated component 110, the airtight connector 210 is installed at the end of the airtight layer 420 of the first prefabricated component 110, and the airtight connector 210 is partially located outside the first prefabricated component 110; when producing the second prefabricated component 120, an installation groove 220 is provided at the airtight layer 420 of the second prefabricated component 120.
[0061] Specifically, when producing the first precast component 110, the heat insulation component 320 is embedded in the surface of the first precast component 110; when producing the second precast component 120, an installation space is provided on the surface of the second precast component 120.
[0062] S2. Transport the first precast component 110 and the second precast component 120 to the construction site and hoist them to the corresponding installation positions.
[0063] S3. Connect the first prefabricated component 110 and the second prefabricated component 120. The insulation layer 410 of the first prefabricated component 110 is connected to the insulation layer 410 of the second prefabricated component 120 through the insulation connection assembly 300. The airtight layer 420 of the first prefabricated component 110 is connected to the airtight layer 420 of the second prefabricated component 120 through the airtight connection assembly 200.
[0064] In this embodiment, step S3 specifically includes the following steps: Connect the first precast component 110 and the second precast component 120. Install the thermal insulation component 320 into the installation space. Embed the other end of the airtight connector 210 into the installation groove 220. If a metal penetrating component 130 is provided between the first precast component 110 and the second precast component 120, then a thermal break sleeve 330 is installed over the metal penetrating component 130. Install the thermal insulation filler 312 and / or the thermal insulation connecting plate 311 between the thermal insulation layer 410 of the first precast component 110 and the thermal insulation layer 410 of the second precast component 120. Subsequently, for prefabricated joint structures with post-cast areas, concrete needs to be poured between the first precast component 110 and the second precast component 120. After pouring, install the thermal insulation connecting plate 311 at the post-cast area and connect it to the thermal insulation layers 410 on both sides. Finally, seal all joint spaces using the sealing component 500.
[0065] S4. Check the airtightness and thermal insulation performance of the connection between the first precast component 110 and the second precast component 120.
[0066] Among them, air tightness performance testing and thermal insulation performance testing are existing technologies in the field of prefabricated building construction, and will not be elaborated here.
[0067] By using the prefabricated node structure construction method provided in this embodiment, the amount of wet work on the construction site can be significantly reduced, and the construction quality can be controlled, which can meet the requirements of standardized and large-scale construction of prefabricated buildings.
[0068] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.
Claims
1. A prefabricated node structure, characterized in that, include: The first prefabricated component (110) and the second prefabricated component (120) are provided with a heat insulation layer (410) and an airtight layer (420). An airtight connection assembly (200) is disposed at the connection between the first prefabricated component (110) and the second prefabricated component (120), wherein the airtight layer (420) of the first prefabricated component (110) is sealed to the airtight layer (420) of the second prefabricated component (120) through the airtight connection assembly (200); An insulation connection assembly (300) is disposed at the connection between the first precast component (110) and the second precast component (120), wherein the insulation layer (410) of the first precast component (110) is connected to the insulation layer (410) of the second precast component (120) through the insulation connection assembly (300).
2. The prefabricated node structure according to claim 1, characterized in that, The thermal insulation connection assembly (300) includes a thermal insulation connector (310), one end of which is connected to the thermal insulation layer (410) of the first precast component (110), and the other end is connected to the thermal insulation layer (410) of the second precast component (120).
3. The prefabricated node structure according to claim 1, characterized in that, The thermal insulation connection assembly (300) includes a thermal insulation element (320), the thermal conductivity of which is less than that of concrete; The heat insulation component (320) is sandwiched between the first precast component (110) and the second precast component (120). The surface of the first precast component (110) contacts the surface of the second precast component (120) through the heat insulation component (320). Alternatively, a post-casting zone is provided between the first precast component (110) and the second precast component (120). The first precast component (110) and the cast-in-place concrete in the post-casting zone, as well as the second precast component (120) and the cast-in-place concrete in the post-casting zone, are in contact through the heat insulation component (320).
4. The prefabricated node structure according to claim 3, characterized in that, The thermal insulation connection assembly (300) further includes a thermal break sleeve (330) connected to the thermal insulation member (320). The thermal break sleeve (330) is provided on both the first precast member (110) and the second precast member (120). The assembled node structure further includes a metal through member (130). The metal through member (130) passes through the post-cast area and the thermal break sleeve (330) and extends to the first precast member (110) or the second precast member (120). The thermal break sleeve (330) is sleeved on a portion of the metal through member (130). The thermal conductivity of the thermal break sleeve (330) is less than that of the metal through member (130).
5. The prefabricated node structure according to claim 1, characterized in that, The connection between the airtight connection component (200) and the airtight layer (420) and the connection between the thermal insulation connection component (300) and the thermal insulation layer (410) are both formed with joint spaces. The joint space between the airtight connection component (200) and the airtight layer (420) is not coaxial with the joint space between the thermal insulation connection component (300) and the thermal insulation layer (410). The assembled node structure also includes a sealing component (500) for sealing the joint spaces.
6. The prefabricated node structure according to claim 5, characterized in that, The sealing assembly (500) includes a sealing block, an expansion filler, and a sealing filler. The sealing block is installed in the joint space. The expansion filler and the sealing filler are both filled between the sealing block and the side wall of the joint space, and the expansion filler expands after filling.
7. The prefabricated node structure according to claim 1, characterized in that, The airtight connection assembly (200) includes an airtight connector (210), one end of which is connected to the airtight layer (420) of the first prefabricated component (110), and the other end of which is connected to the airtight layer (420) of the second prefabricated component (120).
8. The prefabricated node structure according to claim 7, characterized in that, The second prefabricated component (120) is provided with an installation groove (220), the installation groove (220) extends to the airtight layer (420) of the second prefabricated component (120), one end of the airtight connector (210) is fixedly connected to the airtight layer (420) of the first prefabricated component (110), and the other end of the airtight connector (210) is embedded in the installation groove (220) and sealed to the groove wall of the installation groove (220).
9. The prefabricated node structure according to claim 8, characterized in that, The airtight connection assembly (200) further includes an airtight coating, which is applied between the outer wall of the airtight connector (210) and the groove wall of the mounting groove (220).
10. A construction method for prefabricated node structures, characterized in that, The method applicable to the prefabricated node structure as described in any one of claims 1-9 includes the following steps: S1. Produce the first prefabricated component (110) and the second prefabricated component (120) in a factory. S2. Transport the first precast component (110) and the second precast component (120) to the construction site and hoist them to the corresponding installation positions; S3. Connect the first prefabricated component (110) to the second prefabricated component (120), wherein the insulation layer (410) of the first prefabricated component (110) is connected to the insulation layer (410) of the second prefabricated component (120) through the insulation connection assembly (300), and the airtight layer (420) of the first prefabricated component (110) is connected to the airtight layer (420) of the second prefabricated component (120) through the airtight connection assembly (200); S4. Check the airtightness and thermal insulation performance of the connection between the first precast component (110) and the second precast component (120).