A floor connecting joint for fabricated house and a construction method thereof

Abstract

This invention discloses a floor slab connection node for prefabricated residential buildings and its construction method, belonging to the field of prefabricated building technology. The invention includes a first floor slab and a second floor slab, with an insulation device and a waterproofing device at the connection node. The insulation device includes an insulation layer and a sound-absorbing layer disposed within the insulation layer. Connecting blocks are provided on both sides of the insulation layer, and the first and second floor slabs have slots for the connecting blocks to engage. The waterproofing device includes a waterproof board covering the connection node, with a water-absorbing component at the connection point between the waterproof board and each floor slab. This invention, through the insulation layer, prevents heat loss along the joint, thus improving the insulation effect at the node; the sound-absorbing layer weakens and eliminates sound transmission, improving sound insulation; and the waterproof board and water-absorbing component effectively ensure the waterproof performance of the connection point.

Description

Technical Field

[0001] This invention belongs to the field of prefabricated building technology, and more specifically, relates to a floor slab connection node for prefabricated residential buildings and its construction method. Background Technology

[0002] Prefabricated floor slabs are prefabricated in a factory, using various materials such as concrete, reinforced concrete, lightweight aggregate concrete, or ceramsite concrete. Through production line processing, mold casting, and further processing, the stability and high standardization of the produced floor slab quality are ensured. Compared to traditional on-site concrete casting, prefabricated floor slabs offer advantages such as shorter production cycles, reliable quality, and faster construction speed, effectively saving construction time and costs. Furthermore, prefabricated floor slabs reduce construction waste and improve the overall environmental performance of buildings, aligning with the concept of sustainable development in modern architecture.

[0003] However, the floor slab connections in prefabricated housing still have the following problems: compared with normally poured floor slabs, the waterproofing, heat insulation and sound insulation effects of spliced ​​floor slab connections are relatively poor. These shortcomings have limited the popularization and use of prefabricated housing and also caused trouble for users of prefabricated housing. Therefore, it is necessary to design a connection node that can insulate heat and sound.

[0004] A search revealed Chinese Patent Application CN 209637065 U, which discloses a precast floor slab connection node. This application includes a first precast floor slab, a second precast floor slab, and at least two sealing strips. The first precast floor slab has a protruding boss on its side, and a first groove along the height direction of the boss is recessed on its surface. The second precast floor slab has an overlapping notch on its side corresponding to the boss, and a second groove is recessed on the inner surface of the overlapping notch, which is opposite to and fits the first groove. At least two sealing strips are respectively disposed on opposite sides of the first or second groove. While this application can improve the waterproofing effect of precast floor slabs, it does not effectively solve the problem of poor thermal insulation and sound insulation at the floor slab connection.

[0005] For example, Chinese Patent Application No. CN 217949399 U discloses a soundproof floor insulation board. This application includes a concrete base slab, a soundproof board body, an insulation board body, an aesthetic board body, a connecting frame, mounting blocks, mounting grooves, threaded mounting pipes, threaded nails, mounting holes, positioning grooves, and expansion joints. The concrete base slab is located at the bottom of the insulation board body. The concrete base slab provides impact resistance and support, the soundproof board body has good sound insulation and noise reduction capabilities, and the insulation board body, located in the middle, provides thermal insulation, resulting in relatively good thermal insulation and noise reduction effects. While the floor slab in this application has good thermal insulation and noise reduction effects, the problem of poor thermal insulation and noise reduction effects at the floor slab joints remains unresolved. Summary of the Invention

[0006] 1. The problem to be solved

[0007] In view of at least some of the problems existing in the prior art, the present invention proposes a connection node for prefabricated residential floor slabs and its construction method, the purpose of which is to solve the problems of water leakage and poor heat insulation and sound insulation at the splicing joints of existing prefabricated floor slabs.

[0008] 2. Technical Solution

[0009] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0010] The present invention provides a floor slab connection node for prefabricated residential buildings, comprising a first floor slab and a second floor slab, wherein a thermal insulation device is provided at the connection node between the first floor slab and the second floor slab.

[0011] The insulation device includes an insulation layer and a sound-absorbing layer disposed within the insulation layer. Connecting blocks are provided on both sides of the insulation layer, and slots for the connecting blocks to be inserted are provided on the first floor slab and the second floor slab.

[0012] The waterproofing device includes a waterproofing plate covering the connection node, and the connection between the waterproofing plate and the respective floor slab is provided with a water-absorbing component.

[0013] Furthermore, the connecting block is elastically disposed in a sliding groove on the side wall of the insulation layer, and the side of the connecting block facing the groove is a beveled surface.

[0014] Furthermore, a positioning device is provided at the connection node. The positioning device includes a movable block disposed in a first mounting groove on the second floor slab, and an elastic rod is provided between the movable block and the inner sidewall of the first mounting groove.

[0015] Furthermore, the second floor slab is provided with a positioning block, and the first floor slab is provided with a positioning groove for the positioning block to be engaged.

[0016] Furthermore, the second floor slab is provided with a bellows, inside which a sliding plate is elastically installed, and the bellows has an air outlet on the side facing the first mounting groove; the first floor slab presses down on the sliding plate by means of a pressure block on it and its own weight.

[0017] Furthermore, the positioning blocks are located on the top of the second floor slab near the first floor slab, and there are two of them; the bellows is located between the two positioning blocks.

[0018] Furthermore, it also includes a tensile device, which includes a bolt and a toothed plate; wherein, one end of the bolt meshes with the toothed plate through a toothed ring, and the other end engages with a screw hole on the first floor slab; the toothed plate is mounted on the movable block and moves synchronously with the movable block.

[0019] Furthermore, the tensile device also includes an outer friction plate and an inner friction plate respectively disposed on the two floor slabs, and a rubber block is provided in the overlapping area between the two friction plates; when the moving block moves, it generates a compressive force on the inner friction plate through the extrusion block at its end.

[0020] Furthermore, a locking device is provided on the side of the first floor slab and the second floor slab that is far apart from each other. The locking device includes a hinge, a connecting strip, and a stop block. The connecting strip is provided on the upper surface of the hinge, and the bottom surface of both floor slabs is provided with a second mounting groove for the connecting strip to be inserted. The stop block is provided in the second mounting groove and near its outlet.

[0021] Furthermore, the insulation layer is insulation foam, the sound-absorbing layer is sound-absorbing sponge, the waterproof board is an arc-shaped board, and the water-absorbing component is water-absorbing rubber; wherein, the water-absorbing rubber is installed in the groove at the connection between the waterproof board and the floor slab by a bracket.

[0022] This invention also provides a construction method for floor slab connection nodes in prefabricated residential buildings, comprising the following steps:

[0023] The positioning device is installed in the first mounting groove of the second floor slab; at the same time, the bolts, toothed rings and toothed plates of the tensile device are set in the first mounting groove and form a gear transmission with the moving block of the positioning device.

[0024] The first floor slab and the second floor slab are spliced ​​together. At this time, the locking block on the first floor slab is inserted between the moving block and the inner wall of the first mounting groove, and the positioning block on the second floor slab is inserted into the positioning groove on the first floor slab. The top of the bolt is located in the screw hole on the first floor slab. At the same time, the first floor slab squeezes the sliding plate through the pressure block, which compresses the air in the air box and discharges it from the air outlet to blow clean the splicing groove.

[0025] Insert the connecting blocks on both sides of the insulation layer into the corresponding slots of the floor slab. The connecting blocks are then secured in the corresponding slots by the springs.

[0026] The outer friction plate and inner friction plate of the tensile device are set at the ends of the corresponding floor slabs;

[0027] Finally, place the absorbent material in the groove at the top of the floor slab and connect both ends of the waterproof membrane to the corresponding top groove.

[0028] 3. Beneficial effects

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] (1) A prefabricated residential floor slab connection node of the present invention provides an insulation layer at the connection of two floor slabs and a sound-absorbing layer inside the insulation layer; wherein, the insulation layer can prevent heat loss along the joint, thereby improving the insulation effect at the node; the sound-absorbing layer can weaken and eliminate sound transmission, thereby improving the sound insulation effect; in addition, by providing a waterproof board at the connection of two floor slabs, the waterproof performance of the connection can be effectively guaranteed; at the same time, by providing water-absorbing rubber, the water vapor that permeates through the waterproof board can be absorbed, further improving its waterproof performance.

[0031] (2) In a prefabricated residential floor slab connection node of the present invention, when the locking block on the first floor slab is pressed down, the elastic rod is compressed by the moving block, so that there is room for splicing between the two floor slabs, reducing the precision requirements for floor slab assembly, and making the floor slab installation and locking have a certain fault tolerance rate, thereby improving production efficiency.

[0032] (3) In a prefabricated residential floor slab connection node of the present invention, the first floor slab is pressed down by the pressure block on it and by its own weight through the setting of the air box; so that the air in the air box is compressed and discharged from the air outlet, thereby blowing the first installation groove of the second floor slab; to remove the debris in the splicing groove, so that the floor slab splicing is more flat and in place, and to avoid the floor slab splicing not being flat enough due to these debris, which would affect the later flatness acceptance.

[0033] (4) In a prefabricated residential floor slab connection node of the present invention, by setting up an anti-tensile device, when vibration or lateral tensile force occurs, the first floor slab pulls the moving block. The moving block drives the bolt to rotate through the transmission of the toothed plate and toothed ring, thereby achieving the purpose of tightening the bolt; avoiding bolt loosening due to vibration, making the connection between floor slabs safer when vibration occurs. At the same time, when the moving block moves, the squeezing block at its end generates squeezing force on the inner friction plate, thereby increasing the friction between the inner and outer friction plates to counteract the lateral tensile force, which can further improve the seismic resistance between floor slabs. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of a floor slab connection node for prefabricated residential buildings according to the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of a prefabricated residential floor slab connection node after removing the inner and outer friction plates according to the present invention.

[0036] Figure 3 This is a schematic diagram of the layout structure of a floor slab connection node for prefabricated residential buildings according to the present invention.

[0037] Figure 4 For this Figure 3 Enlarged view of point A in the middle;

[0038] Figure 5 This is one embodiment of the positioning device in the present invention;

[0039] Figure 6 This is another embodiment of the positioning device in the present invention;

[0040] Figure 7 This is a schematic diagram of the tensile device in this invention;

[0041] Figure 8 For this Figure 7 Enlarged view of point B in the middle;

[0042] Figure 9 This is one embodiment of the locking device in the present invention.

[0043] Figure 10 This is another embodiment of the locking device in this invention.

[0044] In the diagram: 11. First floor slab; 12. Second floor slab; 121. Slot; 122. First mounting slot; 123. Second mounting slot; 2. Insulation device; 21. Insulation layer; 211. Sliding groove; 22. Connecting block; 23. Sound-absorbing layer;

[0045] 3. Positioning device; 31. Elastic rod; 32. Moving block; 33. Positioning block; 34. Bellows; 35. Slide plate; 36. Pressure block;

[0046] 4. Tensile device; 41. Bolt; 42. Gear ring; 43. Gear plate; 44. Extrusion block; 45. Outer friction plate; 46. Inner friction plate; 47. Rubber block;

[0047] 5. Locking device; 51. Hinge; 52. Connecting bar; 53. Stop block; 54. Spring rod; 55. Push plate; 56. Sliding box; 57. Slider;

[0048] 6. Waterproofing device; 61. Waterproof membrane; 62. Support frame; 63. Water-absorbing component. Detailed Implementation

[0049] The present invention will be further described below with reference to specific embodiments.

[0050] Example 1

[0051] refer to Figure 1 , Figure 2 As shown in the figure, a floor slab connection node for prefabricated residential buildings in this embodiment includes a first floor slab 11 and a second floor slab 12. A thermal insulation device 2 and a waterproofing device 6 are provided at the connection node between the first floor slab 11 and the second floor slab 12. The thermal insulation device 2 is used to ensure thermal insulation and sound insulation at the connection node; the waterproofing device 6 is used to ensure waterproofing at the connection node.

[0052] Specifically, refer to Figure 4 As shown, the heat insulation device 2 includes a heat insulation layer 21, a connecting block 22, and a sound-absorbing layer 23. The sound-absorbing layer 23 is disposed within the heat insulation layer 21.

[0053] Both sides of the insulation layer 21 are provided with sliding grooves 211 for accommodating the connecting block 22, and the connecting block 22 is elastically disposed in the sliding grooves 211. The sides of the first floor slab 11 and the second floor slab 12 are provided with slots 121 for the connecting block 22 to be inserted.

[0054] Preferably, the side of the connecting block 22 facing the slot 121 is beveled to facilitate the smooth insertion of the connecting block 22 into the slot 121.

[0055] Specifically, in this embodiment, the heat insulation layer 21 is made of heat insulation foam, and the sound absorption layer 23 is made of sound absorption sponge; an elastic element, such as a spring, is provided between the connecting block 22 and the inner wall of the sliding groove 211.

[0056] In this embodiment, a prefabricated residential floor slab connection node is assembled by first pressing the connecting block 22 into the sliding groove 211, and then aligning the sliding groove 211 with the slot 121 on the floor slab. When the insulation layer 21 is fully inserted between the two slots 121, the connecting block 22 pops outward and snaps into the corresponding slot 121 under the action of spring force. This snap-fit ​​installation method is simple and quick to operate, which helps to improve assembly efficiency.

[0057] Of course, multiple heat preservation devices 2 can be provided in this embodiment according to actual needs. Specifically, two sets of heat preservation devices 2 are provided in this embodiment.

[0058] In this embodiment, a prefabricated residential floor slab connection node, through the setting of thermal insulation foam, can prevent heat loss along the joint gaps, thereby improving the thermal insulation effect at the node; through the setting of sound-absorbing sponge, it can weaken and eliminate sound transmission, thereby reducing noise pollution and improving the living environment.

[0059] Example 2

[0060] This embodiment is one example of a waterproof device 6.

[0061] refer to Figure 1 , Figure 4 As shown, the waterproofing device 6 includes a waterproofing plate 61 covering the connection node, with both ends of the waterproofing plate 61 located on the top surface of the corresponding floor slab.

[0062] Preferably, the waterproof board 61 is an arc-shaped board. The arc shape allows rainwater to flow away to both sides, preventing rainwater from entering the gaps at the joints.

[0063] Practical experience shows that a single waterproofing membrane 61 is difficult to completely isolate rainwater. This is because after rainwater penetrates the surface of the floor slab, some moisture will still enter the gaps, thus affecting the waterproofing performance at the joints.

[0064] To further ensure the waterproofing effect at the joint, the waterproofing device 6 also includes a bracket 62 and a water-absorbing component 63. The water-absorbing component 63 is disposed in the groove at the connection between the waterproofing board 61 and the floor slab, while the bracket 62 is used to support and limit the water-absorbing component 63 to prevent it from sliding out of the groove.

[0065] Preferably, the water-absorbing element 63 is made of water-absorbing rubber.

[0066] This embodiment describes a floor slab connection node for prefabricated residential buildings. By setting up a water-absorbing component 63, the water vapor that seeps in can be effectively absorbed, thereby ensuring the waterproof effect at the node. At the same time, by setting up a bracket 62, it is more convenient and faster for operators to replace the water-absorbing component 63 regularly.

[0067] Example 3

[0068] This embodiment of a prefabricated residential floor slab connection node, based on the above embodiment, also includes a positioning device 3 to facilitate the assembly operation between the first floor slab 11 and the second floor slab 12.

[0069] refer to Figure 3 , Figure 5As shown, the connecting end face of the second floor slab 12 is generally stepped. An insulation device 2 is provided at the first step and at the bottom of the second step; the positioning device 3 is located on the second step, and the second step has a first mounting groove 122.

[0070] The positioning device 3 includes an elastic rod 31 and a movable block 32 disposed within the first mounting groove 122. The movable block 32 is arranged along the slotting direction of the first mounting groove 122. One end of the elastic rod 31 is connected to the movable block 32, and the other end is connected to the inner wall of the first mounting groove 122 near the first floor slab 11. A gap is left between the movable block 32 and the other inner wall of the first mounting groove 122 to allow a locking block (not shown in the figure) at the bottom of the first floor slab 11 to engage.

[0071] To facilitate the insertion of the bottom locking block of the first floor slab 11, the movable block 32 is a chamfered block. That is to say, the top of the movable block 32 facing the locking block is a beveled surface, which provides a certain guiding effect for the insertion of the locking block.

[0072] In addition, a positioning block 33 is provided on the second step; a positioning groove (not shown in the figure) is provided at the corresponding position at the bottom of the first floor slab 11 for the positioning block 33 to be inserted.

[0073] The positioning block 33 is located at the edge of the second step near the first floor slab 11, and there are two positioning blocks 33.

[0074] In this embodiment, a prefabricated residential floor slab connection node is provided. During assembly, the bottom locking block of the first floor slab 11 presses against the moving block 32, which in turn pushes the elastic rod 31, causing the elastic rod 31 to retract. This allows for a certain margin of error in the splicing between the first floor slab 11 and the second floor slab 12, reducing the precision requirements for the prefabricated floor slabs. This also provides a certain degree of tolerance during the installation and splicing of the floor slabs, thereby further improving assembly efficiency. Simultaneously, the cooperation between the positioning groove and the positioning block 33 restricts the installation position of the floor slabs, preventing misalignment during the hoisting and splicing of the two floor slabs.

[0075] Example 4

[0076] During the formwork erection process or when the floor slab itself collides during installation, debris such as sawdust and small pebbles may be generated. This debris can easily fall onto the joints of the floor slabs, thus affecting the flatness of the joints.

[0077] To address this issue, this embodiment of a prefabricated residential floor slab connection node further optimizes the design of the positioning device 3 based on embodiment 3.

[0078] refer to Figure 6As shown, the positioning device 3 also includes a bellows 34, which has an air outlet near the bottom on the side facing the first mounting groove 122.

[0079] The bellows 34 contains a sliding plate 35, the bottom of which is connected to the bottom wall of the bellows 34 by a spring. The bottom of the first floor slab 11 is provided with a pressure block 36 for pressing the sliding plate 35.

[0080] In this specific embodiment, the bellows 34 is disposed between two positioning blocks 33.

[0081] In this embodiment, a prefabricated residential floor slab connection node is provided. During assembly, the first floor slab 11 is pressed against the sliding plate 35 by the pressure block 36. The weight of the first floor slab 11 and the pressure block 36 overcomes the spring force, forcing the sliding plate 35 to move downward. During the downward movement of the sliding plate 35, the air in the bellows 34 is compressed and discharged from the air outlet. This allows the first mounting groove 122 to be blown clean to remove debris from the splicing groove, making the floor slab splicing more flat and in place. This avoids the floor slab splicing not being flat enough due to these debris, which would affect the later flatness acceptance.

[0082] Example 5

[0083] This embodiment of a prefabricated residential floor slab connection node, based on the above embodiment, also includes a tensile device 4.

[0084] refer to Figure 7 , Figure 8 As shown, the tensile device 4 includes a bolt 41 and a toothed plate 43. One end of the bolt 41 meshes with the toothed plate 43 through a toothed ring 42, and the other end is threaded into a screw hole on the first floor slab 11. The toothed plate 43 is disposed on the side of the moving block 32 and moves synchronously with the moving block 32.

[0085] In this embodiment, a floor slab connection node for prefabricated residential buildings is described. When the floor slab vibrates or experiences lateral tensile force, the first floor slab 11 pulls the moving block 32. The moving block 32, through the transmission of the toothed plate 43 and toothed ring 42, drives the bolt 41 to rotate, thereby tightening the bolt 41. This prevents the bolt 41 from loosening due to vibration, ensuring a safer connection between floor slabs during vibration or lateral tensile forces.

[0086] Example 6

[0087] To further improve the tensile strength at the floor slab connection nodes, this embodiment of a prefabricated residential floor slab connection node, based on embodiment 5, further optimizes the design of the tensile device 4.

[0088] Specifically, refer to Figure 1 , Figure 7As shown, the tensile device 4 further includes an outer friction plate 45 and an inner friction plate 46. The inner friction plate 46 is disposed at the end of the first floor slab 11, and the outer friction plate 45 is disposed at the end of the second floor slab 12. The inner friction plate 46 and the outer friction plate 45 have an overlapping section at the floor slab connection node.

[0089] The moving block 32 is provided with a pressing block 44 at its end. When the floor slab vibrates or generates a lateral tensile force, the first floor slab 11 pulls the moving block 32, and the moving block 32 presses the inner friction plate 46 through the pressing block 44. This increases the friction between the inner friction plate 46 and the outer friction plate 45, thereby achieving the purpose of counteracting the lateral tensile force.

[0090] Preferably, rubber blocks 47 are provided in the overlapping area of ​​the inner and outer friction plates to further increase the friction between them, thereby further improving the seismic resistance between the floor slabs.

[0091] The extrusion block 44 can extrude the inner friction plate 46 in various ways. For example, the extrusion block 44 or the inner friction plate 46 can be designed in a wedge shape. In this specific embodiment, the end of the inner friction plate 46 that contacts the extrusion block 44 is designed in a wedge shape, meaning its thickness gradually decreases, and the extrusion block 44 is semi-circular in shape.

[0092] In addition, this embodiment also provides a construction method for the connection node of floor slabs in prefabricated residential buildings, including the following steps:

[0093] The positioning device 3 is installed in the first mounting groove 122 of the second floor slab 12; at the same time, the bolt 41, toothed ring 42 and toothed plate 43 of the tensile device 4 are set in the first mounting groove 122 and form a gear transmission with the moving block 32 of the positioning device 3.

[0094] The first floor slab 11 and the second floor slab 12 are spliced ​​together. At this time, the locking block on the first floor slab 11 is just locked between the moving block 32 and the inner wall of the first mounting groove 122, and the positioning block 33 on the second floor slab 12 is locked into the positioning groove on the first floor slab 11. The top of the bolt 41 is located in the screw hole on the first floor slab 11. At the same time, the first floor slab 11 squeezes the sliding plate 35 through the pressure block 36, so that the air in the air box 34 is compressed and discharged from the air outlet to blow clean the splicing groove.

[0095] The connecting blocks 22 on both sides of the insulation layer 21 are respectively inserted into the corresponding slots of the floor slab, and the connecting blocks 22 are locked in the corresponding slots under the action of the spring;

[0096] The outer friction plate 45 and the inner friction plate 46 of the tensile device 4 are installed at the ends of the corresponding floor slabs;

[0097] Finally, place the water-absorbing component 63 in the groove at the top of the floor slab, and connect both ends of the waterproof membrane 61 to the corresponding top groove.

[0098] Example 7

[0099] During floor slab hoisting, the precast floor slab needs to be placed on the erected formwork, and supported by the formwork and scaffolding to facilitate subsequent pouring. To prevent the precast floor slab from shifting on the formwork and affecting the subsequent pouring operation, this embodiment of a prefabricated residential floor slab connection node, based on the above embodiment, also includes a locking device 5 for fixing the floor slab to be poured.

[0100] refer to Figure 3 , Figure 9 As shown, the locking device 5 includes a hinge 51, the upper surface of which is provided with a connecting strip 52, and the bottom of the floor slab is provided with a second mounting groove 123 for the connecting strip 52 to be engaged. A stop block 53 is provided at the outlet of the second mounting groove 123.

[0101] Preferably, the stop block 53 is in the shape of an inverted triangle, and the end of the connecting strip 52 is a bevel that matches the inverted triangle.

[0102] In this embodiment, a prefabricated residential floor slab connection node uses a hinge 51 to fix the floor slab onto a template, thereby locking the position of the prefabricated floor slab and preventing it from shifting due to mechanical collisions or other reasons.

[0103] Meanwhile, after the poured concrete has solidified, when it is necessary to dismantle the scaffolding and formwork, construction workers can use a hammer to strike the hinge 51, causing the hinge 51 and connecting strip 52 to move outward. When the connecting strip 52 moves to the outlet of the second mounting groove 123, it will be stopped by the stop block 53; with continuous external force, the second mounting groove 123 will eventually be forced to pass through the bottom of the stop block 53, thereby causing the hinge 51 to tilt up, which is conducive to the dismantling operation of the hinge 51.

[0104] Example 8

[0105] To further facilitate dismantling operations, the locking device 5 has been further optimized in this implementation.

[0106] refer to Figure 10 As shown, the locking device 5 also includes a spring rod 54 and a push plate 55. The spring rod 54 is disposed in a groove at the bottom of the hinge 51, and one end of the spring rod 54 is connected to the push plate 55.

[0107] After the scaffolding is dismantled, the elastic rod 54 loses pressure and drives the push plate 55 to pop out, thereby assisting in the separation between the formwork and the floor slab, making it easier for construction workers to dismantle the formwork.

[0108] In addition, the end of the hinge 51 is provided with a sliding box 56, and a slider 57 is connected inside the sliding box 56 by a spring. When the template is removed, the slider 57 will pop out from the sliding box 56 under the elastic force of the spring, providing a point of force for the subsequent removal of the hinge 51; so that the hinge 51 can fully withstand the hammering force, making it convenient for construction workers to disassemble the hinge 51.

[0109] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A floor slab connection node for prefabricated residential buildings, comprising a first floor slab (11) and a second floor slab (12), characterized in that: A thermal insulation device (2) is provided at the connection node between the first floor slab (11) and the second floor slab (12). The heat insulation device (2) includes a heat insulation layer (21) and a sound absorption layer (23) disposed in the heat insulation layer (21). Connecting blocks (22) are provided on both sides of the heat insulation layer (21). The first floor slab (11) and the second floor slab (12) are provided with slots (121) for the connecting blocks (22) to be inserted. And a waterproofing device (6), the waterproofing device (6) includes a waterproofing plate (61) covering the connection node, and the connection between the waterproofing plate (61) and the respective floor slab is provided with a water-absorbing element (63). The connection node is also provided with a positioning device (3), which includes a movable block (32) in the first mounting groove (122) on the second floor slab (12). An elastic rod (31) is provided between the movable block (32) and the inner wall of the first mounting groove (122). During assembly, the movable block (32) is squeezed by the bottom block of the first floor slab (11), and the movable block (32) pushes the elastic rod (31), and the elastic rod (31) retracts. The second floor slab (12) is provided with a positioning block (33), and the first floor slab (11) is provided with a positioning groove for the positioning block (33) to be inserted into; the positioning block (33) is located on the top of the second floor slab (12) near the first floor slab (11), and there are two of them; The second floor slab (12) is provided with a bellows (34), which is located between two positioning blocks (33). The bellows (34) is elastically provided with a sliding plate (35), and the bellows (34) has an air outlet on the side facing the first mounting groove (122). The first floor slab (11) presses down on the sliding plate (35) by the pressure block (36) on it and by its own weight.

2. The prefabricated residential floor slab connection node according to claim 1, characterized in that: The connecting block (22) is elastically disposed in the sliding groove (211) on the side wall of the insulation layer (21), and the side of the connecting block (22) facing the slot (121) is a beveled surface.

3. A floor slab connection node for prefabricated residential buildings according to any one of claims 1-2, characterized in that: It also includes a tensile device (4), which includes a bolt (41) and a toothed plate (43); wherein one end of the bolt (41) meshes with the toothed plate (43) through a toothed ring (42), and the other end is engaged with a screw hole on the first floor slab (11); the toothed plate (43) is set on the moving block (32) and moves synchronously with the moving block (32).

4. A floor slab connection node for prefabricated residential buildings according to claim 3, characterized in that: The tensile device (4) further includes an outer friction plate (45) and an inner friction plate (46) respectively set on the two floor slabs, and a rubber block (47) is provided in the overlapping area between the two friction plates; when the moving block (32) moves, it generates a squeezing force on the inner friction plate (46) through the squeezing block (44) at its end.

5. A floor slab connection node for prefabricated residential buildings according to claim 4, characterized in that: Locking devices (5) are provided on the opposite sides of the first floor slab (11) and the second floor slab (12). The locking devices (5) include a hinge (51), a connecting strip (52), and a stop block (53). The connecting strip (52) is located on the upper surface of the hinge (51). The bottom surfaces of the two floor slabs are provided with a second mounting groove (123) for the connecting strip (52) to be inserted. The stop block (53) is located in the second mounting groove (123) and near its outlet.

6. The construction method for a floor slab connection node in prefabricated residential buildings as described in claim 5, characterized in that: Includes the following steps, The positioning device (3) is installed in the first mounting groove (122) of the second floor slab (12); at the same time, the bolt (41), toothed ring (42) and toothed plate (43) of the tensile device (4) are set in the first mounting groove (122) and form a gear transmission with the moving block (32) of the positioning device (3); The first floor slab (11) and the second floor slab (12) are spliced ​​together. At this time, the locking block on the first floor slab (11) is just inserted between the moving block (32) and the inner wall of the first mounting groove (122). The positioning block (33) on the second floor slab (12) is inserted into the positioning groove on the first floor slab (11). The top of the bolt (41) is located in the screw hole on the first floor slab (11). At the same time, the first floor slab (11) squeezes the sliding plate (35) through the pressure block (36), so that the air in the air box (34) is compressed and discharged from the air outlet to blow clean the splicing groove. The connecting blocks (22) on both sides of the insulation layer (21) are respectively inserted into the corresponding slots of the floor slab, and the connecting blocks (22) are clamped in the corresponding slots under the action of the spring; The outer friction plate (45) and inner friction plate (46) of the tensile device (4) are set at the ends of the corresponding floor slabs; Finally, place the absorbent component (63) in the groove at the top of the floor slab, and connect the two ends of the waterproof board (61) to the corresponding top groove.

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