Connecting structure for fabricated building and construction method of connecting structure

Abstract

The connecting structure comprises a truss system used for fixing non-dismantling heat preservation formworks and a pouring formwork, the non-dismantling heat preservation formworks are located outside a building, a joint of every two vertically adjacent non-dismantling heat preservation formworks is located between floor plates, the pouring formwork is located in the building, and the truss system is used for fixing the non-dismantling heat preservation formworks and the pouring formwork. A plurality of first ribs are arranged on the non-dismantling heat preservation formwork, one end of each first rib is connected with a truss system on the non-dismantling heat preservation formwork, and the other end of each first rib sequentially penetrates through the non-dismantling heat preservation formwork and the pouring formwork, then extends to the outside of the pouring formwork and is connected with the truss system on the pouring formwork. The design thought that the non-dismantling heat preservation formworks are arranged outside a building is adopted, so that the non-dismantling heat preservation formworks can cover the outer sides of the floor plates, and the floor plates can be completely covered with the non-dismantling heat preservation formworks on the upper layer and the lower layer. And in cooperation with the following traction system, construction projects outside the floor can be effectively reduced, and the number of structures for supporting the non-dismantling heat preservation formwork from the outside of the building is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving project construction. More specifically, the present invention relates to a connection structure for prefabricated buildings and a construction method thereof. Background Art

[0002] A prefabricated building refers to a building method in which a building is disassembled into standardized prefabricated components such as wall panels, floor slabs, staircases, kitchen and bathroom modules, etc. After being produced through an industrialized process in a factory, they are transported to the construction site for precise assembly. Prefabricated buildings have significant characteristics such as high efficiency, time-saving, environmental protection, quality controllability, flexibility, and cost optimization. With the development of prefabricated buildings, the construction industry pays more and more attention to the construction period while ensuring the construction quality, and the non-removable insulation formwork can just be applied to the field of prefabricated buildings. The non-removable formwork can be directly used as a pouring formwork, so that the bonding area of the bonding layer reaches 100%, thereby reducing the gap between the insulation layer and the concrete layer, reducing the water permeability and heat conduction, and improving the insulation effect.

[0003] However, for high-rise buildings, usually the floor slab is poured first, and then the exterior wall is poured. Inevitably, this will cause the insulation layer not to be covered at the floor slab, and traditional anchoring techniques need to be used to supplement the installation of the insulation layer. And when pouring, in order to avoid supporting and fixing the formwork by setting up scaffolding and other facilities outside the building, usually the non-removable formwork is erected on the floor slab. In this way, the usable area inside the building will be compressed. How to expand the usable area inside the building as much as possible when pouring the wall surface, and at the same time enable the floor slab layer to also cover the non-removable formwork is the technical problem to be solved by the present invention. Summary of the Invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description section. The Summary of the Invention section of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0005] To solve at least partially the above problems, the present invention provides a connection structure for prefabricated buildings, including: a truss system for fixing non-removable insulation formwork and pouring formwork. The non-removable insulation formwork is located outside the building, and the joints between two adjacent non-removable insulation formworks up and down are located between floor slabs. The pouring formwork is located inside the building. A plurality of first reinforcing bars are provided on the non-removable insulation formwork. One end of the first reinforcing bar is connected to the truss system on the non-removable insulation formwork, and the other end sequentially penetrates through the non-removable insulation formwork and the pouring formwork, extends to the outside of the pouring formwork, and is connected to the truss system on the pouring formwork.

[0006] Preferably, the first reinforcing bar is arranged horizontally.

[0007] Preferably, a support system is further included. The support system is arranged on the floor slab and is detachably connected to the casting formwork.

[0008] Preferably, the support system consists of a fixed block detachably connected to the floor slab and a support rod detachably connected to the fixed block. One end of the support rod is connected to the fixed block through an adaptive joint, and the other end is connected to the casting formwork.

[0009] Preferably, an activity groove is arranged on the top surface of the fixed block. The bottom surface of the activity groove is an arc surface. A slider is arranged in the activity groove. An installation hole is arranged on the top surface of the slider. The adaptive joint is arranged in the installation hole. A fixed groove is arranged on the bottom surface of the fixed block. A strip-shaped hole communicating with the fixed groove is arranged on the bottom surface of the activity groove. A connecting piece is arranged on the slider. The connecting piece penetrates through the strip-shaped hole and extends into the fixed groove. A clamping piece is arranged in the fixed groove. The clamping piece is detachably connected to the connecting piece, and the clamping piece is clamped with the inner top surface of the fixed groove.

[0010] Preferably, the adaptive joint consists of a square tube and a support ring arranged on the outer wall of the square tube. First grooves are arranged on the four side walls of the square tube. The first grooves are triangular open grooves. The openings are located at the top of the square tube, and the angles opposite to the openings are located below the support ring. Four second grooves are arranged on the support ring. The second grooves divide the support ring into four pieces. The second grooves communicate with the first grooves. The support rod is located in the square tube, and the outer wall of the support ring abuts against the inner wall of the installation hole.

[0011] Preferably, a pulling system is further included. The pulling system is arranged on the floor slab. The pulling system is connected to the first reinforcement bar or is connected to the truss system of the casting formwork through the second reinforcement bar.

[0012] Preferably, the pulling system consists of a mounting plate and at least three clamping pieces. The mounting plate is arranged on the floor slab. A circular through hole and at least three positioning holes for mounting the clamping pieces are arranged on the mounting plate. The positioning holes communicate with the through hole, and the angles between adjacent two positioning holes are the same. The clamping pieces are located in the positioning holes and are axially connected to the positioning holes.

[0013] Preferably, the clamping piece is of an eccentric shaft structure. A shaft hole for connecting with a fixed shaft is arranged on the clamping piece. The fixed shaft is located in the shaft hole. The two ends of the fixed shaft are respectively connected to the two inner side walls opposite to the positioning hole. The end of the clamping piece far away from the shaft hole is a clamping end, and a variable diameter groove is arranged on the end face of the clamping end.

[0014] A construction method for a connection structure for an assembled building is as follows:

[0015] S1: Erect the non - removable insulation formwork and the casting formwork.

[0016] S2: Build the truss system on the non - removable insulation formwork and the casting formwork respectively.

[0017] S3: Connect the non - removable insulation formwork and the casting formwork through the first reinforcement bars, place the non - removable insulation formwork on the outer side of the building, make the upper and lower ends of the non - removable insulation formwork located between the floor slabs, place the casting formwork inside the building, and make the upper and lower ends of the casting formwork abut against the floor slabs.

[0018] S4: Set positioning piles on the floor slab, and connect and fix the support system and the pulling system to the positioning piles.

[0019] S5: Connect the support system to the casting formwork, connect the pulling system to the first reinforcement bars or connect the pulling system to the truss system of the casting formwork through the second reinforcement bars.

[0020] S6: Cast the wall surface.

[0021] S7: After the concrete solidifies, remove the casting formwork, the support system, the pulling system, and the positioning piles.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] The present invention adopts the design concept of setting the non - removable insulation formwork outside the building, so that the non - removable insulation formwork can cover the outer side of the floor slab. The top of the non - removable insulation formwork occupies the lower half of the floor slab above, and the bottom of the non - removable insulation formwork occupies the upper half of the floor slab below. As Figure 2 shown, this enables the non - removable insulation formworks of the upper and lower layers to completely cover the floor slab. And the part of the non - removable insulation formwork extending to the middle of the floor slab can form an effect similar to a clamping plate, which can cooperate with the casting formwork to prevent the overall formwork from turning outwards to the outside of the building. The first reinforcement bars can be used as anchor bars after casting the wall surface, increasing the connection strength of the non - removable insulation formwork. At the same time, when erecting the non - removable insulation formwork and the casting formwork, the first reinforcement bars can cooperate with the following pulling system to realize the pulling of the non - removable insulation formwork from inside the floor, preventing the non - removable insulation formwork from deforming and falling off during the process of casting the wall surface, and by cooperating with the pulling system, it can effectively reduce the construction projects outside the floor and reduce the number of structures for supporting the non - removable insulation formwork from the outside of the building.

[0024] For the connection structure and construction method for prefabricated buildings of the present invention, other advantages, objectives and features of the present invention will be partially reflected by the following description, and partially will be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of the connection structure for prefabricated buildings according to the present invention (the floor slab is not shown).

[0027] Figure 2 It is a construction schematic diagram of the connection structure for prefabricated buildings according to the present invention (the upper layer is the wall surface that has not been poured, and the lower layer is the wall surface for which pouring has ended and relevant structures have been removed).

[0028] Figure 3 It is a schematic diagram of the structure of the support system.

[0029] Figure 4 It is a schematic cross-sectional structure diagram of the support system.

[0030] Figure 5 It is a schematic diagram of the adaptive joint.

[0031] Figure 6 It is a schematic diagram of the pulling system.

[0032] Figure 7 It is a schematic diagram when the second reinforcing bar is not pulled by the pulling system.

[0033] Figure 8 It is Figure 7 Cross-sectional view of.

[0034] Figure 9 It is a schematic diagram when the second reinforcing bar with a larger diameter is pulled by the pulling system.

[0035] Figure 10 It is Figure 9 Cross-sectional view of.

[0036] Figure 11 It is a schematic diagram when the second reinforcing bar with a smaller diameter is pulled by the pulling system.

[0037] Figure 12 It is Figure 11 Cross-sectional view of.

[0038] In the figures: 1 is the non-removable thermal insulation formwork, 2 is the casting formwork, 3 is the truss system, 4 is the floor slab, 5 is the first reinforcing bar, 6 is the support system, 61 is the fixing block, 611 is the movable groove, 612 is the fixing groove, 613 is the strip-shaped hole, 62 is the support rod, 63 is the adaptive joint, 631 is the square pipe, 6311 is the first groove, 632 is the support ring, 6321 is the second groove, 64 is the slider, 641 is the connecting piece, 642 is the clamping piece, 7 is the pulling system, 71 is the mounting plate, 711 is the through hole, 72 is the clamping piece, 73 is the fixed shaft, 74 is the variable diameter groove, 8 is the second reinforcing bar, and 9 is the wall surface. Detailed implementation manners

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, so that those skilled in the art can implement it with reference to the text of the specification.

[0040] It should be understood that terms such as "having", "including", and "comprising" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0041] As Figures 1 - 12 shown, the present invention provides a connection structure for prefabricated buildings, including: a truss system 3 for fixing the non-removable insulation formwork 1 and the casting formwork 2. As Figure 1 shown, the non-removable insulation formwork 1 is located outside the building, and the joints between two adjacent non-removable insulation formworks 1 up and down are located between the floor slabs 4. As Figure 2 shown, compared with the traditional method of building the non-removable insulation formwork 1 and the casting formwork 2 on the floor slab 4, the present invention adopts the design concept of setting the non-removable insulation formwork 1 outside the building, so that the non-removable insulation formwork 1 can cover the outside of the floor slab 4. The top of the non-removable insulation formwork 1 occupies the lower half of the upper floor slab 4, and the bottom of the non-removable insulation formwork 1 occupies the upper half of the lower floor slab 4. As Figure 2 shown, this enables the non-removable insulation formworks 1 of the upper and lower layers to completely cover the floor slab 4. And the part where the non-removable insulation formwork 1 extends to the middle of the floor slab 4 can form an effect similar to a clamping plate, which can cooperate with the casting formwork 2 to prevent the overall formwork from turning outwards to the outside of the building. At the same time, it can cooperate with the following pulling system 7 to limit the non-removable insulation formwork 1 and prevent the non-removable insulation formwork 1 from being pulled into the building. As Figure 2 shown, the casting formwork 2 is located inside the building, and the top of the casting formwork 2 abuts against the bottom of the upper floor slab 4, and the bottom of the casting formwork 2 abuts against the top of the lower floor slab 4, so that the casting formwork 2 is in a state of being clamped by the upper and lower floor slabs 4, thereby preventing the erected non-removable insulation formwork 1 and casting formwork 2 from turning outwards to the outside of the building. A number of first reinforcing bars 5 are provided on the non-removable insulation formwork 1. The first reinforcing bars 5 are arranged horizontally. One end of the first reinforcing bar 5 is connected to the truss system 3 on the non-removable insulation formwork 1, and the other end sequentially penetrates through the non-removable insulation formwork 1 and the casting formwork 2 and then extends outside the casting formwork 2 and is connected to the truss system 3 on the casting formwork 2. Thus, the first reinforcing bars 5 can be used as anchor bars after the wall surface 9 is cast, increasing the connection strength of the non-removable insulation formwork 1. At the same time, when the non-removable insulation formwork 1 and the casting formwork 2 are erected, the first reinforcing bars 5 can cooperate with the following pulling system 7 to realize the pulling of the non-removable insulation formwork 1 from inside the floor, preventing the non-removable insulation formwork 1 from deforming and falling off during the process of casting the wall surface 9, and by cooperating with the pulling system 7, the construction projects outside the floor can be effectively reduced, and the number of structures for supporting the non-removable insulation formwork 1 from outside the building can be reduced.

[0042] It also includes a support system 6 and a tension system 7. To facilitate the temporary fixation of the support system 6 and the tension system 7, positioning piles are usually set on the floor slab 4. The support system 6 is arranged on the floor slab 4 and is detachably connected to the positioning piles. Then, the support system 6 is detachably connected to the casting formwork 2, so that the support system 6 can support the casting formwork 2.

[0043] The tension system 7 is arranged on the floor slab 4 and is detachably connected to the positioning piles. The tension system 7 can be connected to the first reinforcement 5, so as to directly tension the first reinforcement 5, or be connected to the first reinforcement 5 (or the truss system 3 of the casting formwork 2) through the second reinforcement 8. Whether directly or indirectly tensioning the first reinforcement 5, in addition to preventing the non-removable thermal insulation formwork 1 from falling off, the first reinforcement 5 can be tensioned and fixed before pouring the wall surface 9, so that after pouring the wall surface 9, the first reinforcement 5 can be used as a prestressed reinforcement to increase the bearing capacity of the wall surface 9.

[0044] Furthermore, the support system 6 is composed of a fixing block 61 detachably connected to the floor slab 4 and a support rod 62 detachably connected to the fixing block 61. The fixing block 61 is detachably connected to the positioning piles. Usually, the fixing block 61 is provided with holes that can be sleeved on the positioning piles. During use, the fixing block 61 can be directly sleeved on the positioning piles. Since the distance between each positioning pile and the casting formwork 2 is not fixed, in order to improve the versatility of the support system 6, the length and shape of the support rod 62 are usually not restricted. For the convenience of transportation and assembly, the support rod 62 usually adopts a Figure 3 hollow rectangular pipe as shown. One end of the support rod 62 is connected to the fixing block 61 through an adaptive joint 63, and the other end is connected to the casting formwork 2. By setting the adaptive joint 63, there is no need to make excessive requirements on the thickness of the support rod 62.

[0045] Furthermore, a movable groove 611 is arranged on the top surface of the fixing block 61, and the bottom surface of the movable groove 611 is an arc surface, as Figure 3 shown. A slider 64 is arranged in the movable groove 611, and the bottom surface of the slider 64 is an arc adapted to the bottom surface of the movable groove 611, as Figure 4 shown. Thus, the slider 64 can slide on the bottom surface of the movable groove 611. An installation hole is arranged on the top surface of the slider 64, and the adaptive joint 63 is arranged in the installation hole. When the slider 64 slides in the movable groove 611, it can drive the support rod 62 on the adaptive joint 63 to swing, so as to adjust the support angle of the support rod 62. Usually, the extension line of the central axis of the support rod 62 passes through the center of the arc surface where the bottom surface of the movable groove 611 is located. By setting the slider 64, the force received by the support rod 62 when supporting the casting formwork 2 can be transmitted to the fixing block 61 through the slider 64.

[0046] Further, in order to fix the support angle of the support rod 62, a fixing groove 612 is provided on the bottom surface of the fixing block 61. The inner top surface of the fixing groove 612 is an arc adapted to the arc surface of the movable groove 611. As Figure 4 shown, a strip-shaped hole 613 communicating with the fixing groove 612 is provided on the bottom surface of the movable groove 611. A connecting member 641 is provided on the slider 64. The connecting member 641 passes through the strip-shaped hole 613 and extends into the fixing groove 612. A clamping member 642 is provided in the fixing groove 612. To cooperate with the clamping member 642, a clamping structure adapted to the clamping member 642 is provided on the inner wall or inner top surface of the fixing groove 612. The clamping member 642 is detachably connected to the connecting member 641, and the clamping member 642 is clamped to the inner top surface of the fixing groove 612.

[0047] As Figure 4 shown, taking the combination of a screw and a nut as the connecting member 641, a toothed arc-shaped block as the clamping member 642, and taking the teeth capable of meshing with the clamping member 642 provided on the inner top surface of the fixing groove 612 as the clamping structure as an example. During installation, the screw is sequentially passed through the slider 64, the strip-shaped hole 613, and the clamping member 642. The position of the slider 64 in the fixing groove 612 is adjusted. Then, the teeth of the clamping member 642 and the inner top surface of the fixing groove 612 are meshed, and the nut on the screw is tightened to tightly press the clamping member 642 against the top surface of the fixing groove 612. Thus, the adjustment and fixation of the angle of the support rod 62 can be completed.

[0048] Further, the adaptive joint 63 is composed of a square tube 631 and a support ring 632 provided on the outer wall of the square tube 631. First grooves 6311 are provided on the four side walls of the square tube 631. The first grooves 6311 are triangular open grooves, and the openings are located at the top of the square tube 631, and the angles opposite to the openings are located below the support ring 632. As Figure 5 shown, four second grooves 6321 are provided on the support ring 632. The second grooves 6321 divide the support ring 632 into four pieces. The second grooves 6321 communicate with the first grooves 6311. The support rod 62 is located inside the square tube 631. The diameter of the support ring 632 is slightly larger than the inner diameter of the installation hole. Thus, when the adaptive joint 63 is inserted into the installation hole, the outer wall of the support ring 632 can abut against the inner wall of the installation hole, so that the support ring 632 can be squeezed and deformed, and further the square tube 631 can be deformed driven by the support ring 632, so that the square tube 631 can clamp the support rod 62. Usually, the installation hole is a non-through hole. As Figure 4As shown, when the support rod 62 does not use the adaptive joint 63, it can also abut against the inner bottom of the mounting hole. It should be noted that if the adaptive joint 63 is not used, the support rod 62 may shake in the mounting hole. Usually, after inserting the support rod 62, fillers such as cardboard need to be additionally filled in the mounting hole to increase the stability of the support rod 62 in the mounting hole.

[0049] Further, the pulling system 7 is composed of a mounting plate 71 and at least three clamping members 72. The mounting plate 71 is arranged on the floor slab 4. Since the pulling system 7 is mainly stressed in the horizontal direction, the pulling system 7 can be stuck on the side of the positioning pile away from the casting form 2, and the positioning pile can be used to block the mounting plate 71 from translating. A circular through hole 711 and at least three positioning holes for mounting the clamping members 72 are arranged on the mounting plate 71. The first rib 5 or the second rib 8 can pass through the through hole 711.

[0050] The positioning holes communicate with the through hole 711, and the included angles between adjacent two positioning holes are the same. Usually, three positioning holes can be arranged, as Figure 6 shown. The central angle between adjacent two positioning holes is 120 degrees. The clamping member 72 is located in the positioning hole and is axially connected to the positioning hole.

[0051] Further, the clamping member 72 is of an eccentric shaft structure, as Figure 8 shown. A shaft hole for connecting with the fixed shaft 73 is arranged on the clamping member 72. The fixed shaft 73 is located in the shaft hole. The two ends of the fixed shaft 73 are respectively connected to the two inner side walls opposite to the positioning hole. The clamping member 72 can rotate around the fixed shaft 73 as the rotation axis. The end of the clamping member 72 away from the shaft hole is the clamping end.

[0052] Taking the pulling of the second rib 8 as an example, first connect one end of the second rib 8 to one end of the first rib 5 (or the truss system 3). Usually, threads are arranged at the connection ends of the second rib 8 and the first rib 5, and the second rib 8 and the first rib 5 are detachably connected through a threaded pipe. The other end of the second rib 8 penetrates into the through hole 711 from the opening on the side of the fixed shaft 73 and penetrates out from the opening on the side of the clamping end of the through hole 711, as Figure 8 shown. After passing through the through hole 711, connect this end to the pulling device, pull the second rib 8. After reaching the set pulling strength, attach the clamping end to the surface of the second rib 8, and the pulling device releases the pulling of the second rib 8. Then, during the rebound process of the second rib 8, it will drive the clamping end to rotate, so that the clamping end clamps the second rib 8 to complete the pulling of the second rib 8.

[0053] As Figure 8As shown, the second reinforcing bar 8 is first inserted into the through hole 711 from right to left. At this time, the clamping member 72 will rotate clockwise to facilitate the insertion and traction of the second reinforcing bar 8. Then, the second reinforcing bar 8 is pulled by a pulling device on the left side of the through hole 711. After pulling to the set pulling strength, the clamping end of the clamping member 72 contacts the second reinforcing bar 8, and the pulling device releases the traction on the second reinforcing bar 8. The second reinforcing bar 8 rebounds to the right, and during the rebounding process, it will drive the clamping member 72 to rotate counterclockwise, thereby increasing the clamping force of the clamping end on the second reinforcing bar 8.

[0054] Because the second reinforcing bar 8 has prestress and always has a tendency to reset to the right, it also enables the clamping member 72 to always have a pulling effect on the second reinforcing bar 8. When the wall surface 9 solidifies and the formwork is removed, the connection between the second reinforcing bar 8 and the first reinforcing bar 5 is released, so that the second reinforcing bar 8 no longer has a tendency to reset to the right. At this time, the second reinforcing bar 8 and the pulling system 7 can be easily disassembled.

[0055] When the pulling system 7 is connected to the first reinforcing bar 5, the positioning pile can be knocked and damaged to release the limit of the positioning pile on the mounting plate 71, thereby releasing the pulling of the pulling system 7 on the first reinforcing bar 5.

[0056] Furthermore, in order to adapt to the first reinforcing bars 5 or the second reinforcing bars 8 with different diameters, a variable diameter groove 74 is provided on the end face of the clamping end. As Figure 6 shown, the variable diameter groove 74 is an arc-shaped groove. The arc length of the variable diameter groove 74 on the side close to the fixed shaft 73 is smaller than the arc length on the side far from the fixed shaft 73. As Figure 6 shown.

[0057] Taking the pulling of the second reinforcing bar 8 as an example, when the diameter of the second reinforcing bar is larger, as Figure 9 and Figure 10 shown, the rotation angle of the clamping member 72 is smaller. When the diameter of the second reinforcing bar 8 is smaller, as Figure 11 and Figure 12 shown, the rotation angle of the clamping member 72 is larger.

[0058] A construction method for a connection structure used in prefabricated buildings is as follows:

[0059] S1: Erect the non-removable insulation formwork 1 and the casting formwork 2;

[0060] S2: Build the truss system 3 on the non-removable insulation formwork 1 and the casting formwork 2 respectively;

[0061] S3: Connect the non-removable insulation formwork 1 and the casting formwork 2 through the first reinforcing bar 5, place the non-removable insulation formwork 1 on the outside of the building, and make the upper and lower ends of the non-removable insulation formwork 1 located between the floor slabs 4. Place the casting formwork 2 inside the building, and make the upper and lower ends of the casting formwork 2 abut against the floor slabs 4;

[0062] S4: Set positioning piles on the floor slab 4, and connect and fix the support system 6 and the pulling system 7 to the positioning piles;

[0063] S5: Connect the support system 6 to the casting formwork 2, connect the pulling system 7 to the first reinforcement 5, or connect it to the first reinforcement 5 through the second reinforcement 8, or connect it to the truss system 3 of the casting formwork 2 through the second reinforcement 8;

[0064] S6: Pour the wall surface 9;

[0065] S7: After the concrete solidifies, remove the casting formwork 2, the truss system 3, the support system 6, the pulling system 7 and the positioning piles.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0068] Although the embodiments of the present invention have been disclosed above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the examples shown and described here.

Claims

1. A connecting structure for prefabricated buildings, comprising: A truss system (3) for fixing the non-removable thermal insulation formwork (1) and the casting formwork (2), characterized in that the non-removable thermal insulation formwork (1) is located outside the building, and the joints between two adjacent non-removable thermal insulation formworks (1) up and down are located between the floor slabs (4). The casting formwork (2) is located inside the building. A number of first ribs (5) are provided on the non-removable thermal insulation formwork (1). One end of the first rib (5) is connected to the truss system (3) on the non-removable thermal insulation formwork (1), and the other end sequentially penetrates through the non-removable thermal insulation formwork (1) and the casting formwork (2), extends to the outside of the casting formwork (2), and is connected to the truss system (3) on the casting formwork (2).

2. The connecting structure for prefabricated buildings according to claim 1, characterized in that, The first rib (5) is arranged in the horizontal direction.

3. The connecting structure for prefabricated buildings according to claim 1, wherein, It further includes a support system (6). The support system (6) is arranged on the floor slab (4) and is detachably connected to the casting formwork (2).

4. The connecting structure for prefabricated buildings according to claim 3, characterized in that, The support system (6) consists of a fixing block (61) detachably connected to the floor slab (4) and a support rod (62) detachably connected to the fixing block (61). One end of the support rod (62) is connected to the fixing block (61) through an adaptive joint (63), and the other end is connected to the casting formwork (2).

5. The connecting structure for prefabricated buildings according to claim 4, characterized in that, The top surface of the fixing block (61) is provided with a movable groove (611). The bottom surface of the movable groove (611) is an arc surface. A slider (64) is arranged in the movable groove (611). The top surface of the slider (64) is provided with a mounting hole. The adaptive joint (63) is arranged in the mounting hole. The bottom surface of the fixing block (61) is provided with a fixing groove (612). The bottom surface of the movable groove (611) is provided with a strip-shaped hole (613) communicating with the fixing groove (612). A connecting piece (641) is arranged on the slider (64). The connecting piece (641) penetrates through the strip-shaped hole (613) and extends into the fixing groove (612). A clamping piece (642) is arranged in the fixing groove (612). The clamping piece (642) is detachably connected to the connecting piece (641), and the clamping piece (642) is clamped with the inner top surface of the fixing groove (612).

6. The connecting structure for prefabricated buildings according to claim 5, characterized in that, The adaptive joint (63) consists of a square pipe (631) and a support ring (632) arranged on the outer wall of the square pipe (631). First grooves (6311) are arranged on the four side walls of the square pipe (631). The first grooves (6311) are triangular open grooves, and the openings are located at the top of the square pipe (631). The angles opposite to the openings are located below the support ring (632). Four second grooves (6321) are arranged on the support ring (632). The second grooves (6321) divide the support ring (632) into four pieces. The second grooves (6321) communicate with the first grooves (6311). The support rod (62) is located inside the square pipe (631), and the outer wall of the support ring (632) abuts against the inner wall of the mounting hole.

7. The connecting structure for prefabricated buildings according to claim 1, characterized in that, It further includes a pulling system (7), the pulling system (7) is arranged on the floor slab (4), the pulling system (7) is connected to the first rib (5), or is connected to the truss system (3) of the formwork (2) through the second rib (8).

8. The connecting structure for prefabricated buildings according to claim 7, characterized in that The pulling system (7) consists of a mounting plate (71) and at least three clamping members (72), the mounting plate (71) is arranged on the floor slab (4), a circular through hole (711) and at least three positioning holes for mounting the clamping members (72) are arranged on the mounting plate (71), the positioning holes communicate with the through hole (711), and the included angle between two adjacent positioning holes is the same, the clamping members (72) are located in the positioning holes and are axially connected to the positioning holes.

9. The connecting structure for prefabricated buildings according to claim 8, characterized in that, The clamping member (72) is of an eccentric shaft structure, a shaft hole for connecting to a fixed shaft (73) is arranged on the clamping member (72), the fixed shaft (73) is located in the shaft hole, both ends of the fixed shaft (73) are respectively connected to two inner side walls opposite to the positioning holes, one end of the clamping member (72) away from the shaft hole is a clamping end, and a variable diameter groove (74) is arranged on the end face of the clamping end.

10. A construction method for a connection structure used in prefabricated buildings, characterized in that, The steps are as follows: S1: Erect the non-removable insulation formwork (1) and the formwork (2) for pouring; S2: Build the truss system (3) on the non-removable insulation formwork (1) and the formwork (2) for pouring respectively; S3: Connect the non-removable insulation formwork (1) and the formwork (2) for pouring through the first rib (5), place the non-removable insulation formwork (1) on the outer side of the building, and make the upper and lower ends of the non-removable insulation formwork (1) be between the floor slabs (4), place the formwork (2) for pouring inside the building, and make the upper and lower ends of the formwork (2) for pouring abut against the floor slabs (4); S4: Set positioning piles on the floor slab (4), and connect and fix the support system (6) and the pulling system (7) to the positioning piles; S5: Connect the support system (6) to the formwork (2) for pouring, and connect the pulling system (7) to the first rib (5) or connect the pulling system (7) to the truss system (3) of the formwork (2) for pouring through the second rib (8); S6: Pour the wall surface (9); S7: After the concrete solidifies, remove the formwork (2) for pouring, the support system (6), the pulling system (7), and the positioning piles.

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