A node connecting device of a modular fabricated building

Abstract

The utility model relates to the technical field of fabricated building, disclose a kind of node connecting device of modular fabricated building, including lower connecting block and upper connecting block, the lower connecting block upper end is provided with sealing gasket, a plurality of fixed holes are arranged in the upper end of sealing gasket, the lower connecting block inside upper end is provided with a plurality of bolts, the lower connecting block upper end is fixedly provided with trapezoidal block in middle part, the lower end of the upper connecting block inside is provided with a plurality of thread holes. In the utility model, after butt joint is completed, bolt is sequentially threaded through the fixed hole on sealing gasket by fixed groove, and it is connected with the thread hole in the upper connecting block inside, gradually tighten along bolt, and then make two connecting blocks gradually compress and fit, and make sealing gasket be compressed, trapezoidal block can improve the alignment accuracy of connecting block, to avoid the installation jamming caused by hole position deviation, reduce construction difficulty, improve assembly efficiency, and the whole device can be reused, reduce overall cost.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, and in particular to a node connection device for modular prefabricated buildings. Background Technology

[0002] In the wave of the construction industry's accelerated transformation and upgrading towards new building industrialization, modular construction, as the most integrated sub-sector of prefabricated building systems, is becoming the focus of industry attention due to its unique advantages of efficient construction and green environmental protection. As a core element of modular construction, node connection devices are not only the core support for ensuring the stability and safety of the overall structure, but also the key element that determines construction efficiency and achieves the goal of industrialized construction. Their performance is directly related to the promotion, application and technological breakthroughs of modular construction.

[0003] Most existing node connection devices use welding or one-time bolt connections. Disassembly requires cutting or damaging components, making modules and nodes unusable. Furthermore, installation often relies on a large number of bolts for fastening, on-site welding, or complex positioning, requiring professional workers to operate. This makes installation time-consuming, labor-intensive, and affects installation efficiency.

[0004] Therefore, those skilled in the art have provided a node connection device for modular prefabricated buildings to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a modular prefabricated building node connection device. The matching structure of the trapezoidal block and the trapezoidal groove has an automatic guiding function, which can quickly correct the horizontal deviation of the upper and lower connecting blocks, improve the alignment accuracy, avoid installation jamming caused by bolt hole misalignment, reduce manual adjustment time, lower the construction threshold, and make the operation time-saving and labor-saving.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A node connection device for a modular prefabricated building includes a lower connecting block and an upper connecting block. A sealing gasket is provided at the upper end of the lower connecting block, and multiple fixing holes are provided through the upper end of the sealing gasket. Multiple bolts are provided at the upper end of the lower connecting block, and a trapezoidal block is fixedly provided at the middle part of the upper end of the lower connecting block.

[0008] The upper connecting block has multiple threaded holes at its lower end and a trapezoidal groove at its lower end.

[0009] Furthermore, the upper end of the sealing gasket is disposed at the lower end of the upper connecting block, and the outer sides of the plurality of bolts are respectively fitted inside the plurality of fixing holes.

[0010] Furthermore, the upper outer ends of the multiple bolts are respectively threaded to the upper inner ends of the multiple threaded holes, and the trapezoidal block is externally disposed inside the trapezoidal groove.

[0011] Furthermore, both the lower connecting block and the upper connecting block have a fixing groove at their front ends, and the upper ends of the multiple threaded holes are located at the lower end of one of the two fixing grooves.

[0012] Furthermore, the lower outer ends of the plurality of bolts are all disposed at the upper end of one of the two fixing grooves.

[0013] Furthermore, the upper end of the lower connecting block is disposed at the lower end of the upper connecting block.

[0014] Furthermore, multiple connecting steel bars are fixedly installed on the exterior of both the lower connecting block and the upper connecting block.

[0015] This utility model has the following beneficial effects:

[0016] This utility model proposes a node connection device for modular prefabricated buildings. When the upper connecting block is hoisted and docked with the lower connecting block, the trapezoidal block at the upper end of the lower connecting block and the trapezoidal groove at the lower end of the upper connecting block form a mating structure. This structure has good guiding properties, automatically guiding and quickly correcting horizontal deviations between the upper and lower connecting blocks during docking, ensuring precise alignment and effectively avoiding installation difficulties caused by misaligned bolt holes. After docking, bolts are sequentially passed through the fixing holes on the sealing gasket via the fixing groove, connecting them to the threaded holes inside the upper connecting block. As the bolts are gradually tightened, the two connecting blocks are gradually pressed together, compressing the sealing gasket. The trapezoidal block improves the alignment accuracy of the connecting blocks, thus avoiding installation jams caused by hole misalignment, reducing construction difficulty, improving assembly efficiency, and the entire device is reusable, reducing overall cost. Attached Figure Description

[0017] Figure 1 This is an isometric schematic diagram of the entire utility model;

[0018] Figure 2 This is a bottom-view explosion-proof isometric schematic diagram of the entire utility model;

[0019] Figure 3 This is a front-view exploded isometric schematic diagram of the entire utility model;

[0020] Figure 4 This is a cross-sectional isometric view of the present invention near the trapezoidal block.

[0021] Legend:

[0022] 1. Lower connecting block; 2. Sealing gasket; 3. Upper connecting block; 4. Bolt; 5. Connecting steel; 6. Fixing groove; 7. Threaded hole; 8. Fixing hole; 9. Trapezoidal groove; 10. Trapezoidal block. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-4 One embodiment provided by this utility model:

[0025] A node connection device for a modular prefabricated building includes a lower connecting block 1 and an upper connecting block 3. A sealing gasket 2 is provided at the upper end of the lower connecting block 1. Multiple fixing holes 8 are provided through the upper end of the sealing gasket 2. Multiple bolts 4 are provided at the upper end of the lower connecting block 1. A trapezoidal block 10 is fixedly provided at the middle part of the upper end of the lower connecting block 1.

[0026] Multiple threaded holes 7 are provided inside the lower end of the upper connecting block 3, and a trapezoidal groove 9 is provided at the lower end of the upper connecting block 3.

[0027] The upper end of the sealing gasket 2 is set at the lower end of the upper connecting block 3. Multiple bolts 4 are respectively sleeved inside multiple fixing holes 8. The upper ends of multiple bolts 4 are respectively threaded into the upper ends of multiple threaded holes 7. The trapezoidal block 10 is set inside the trapezoidal groove 9. The front ends of both the lower connecting block 1 and the upper connecting block 3 are provided with fixing grooves 6. The upper ends of multiple threaded holes 7 are set at the lower end of one of the two fixing grooves 6. The lower ends of multiple bolts 4 are set at the upper end of the other of the two fixing grooves 6. The upper end of the lower connecting block 1 is set at the lower end of the upper connecting block 3. Multiple connecting steels 5 are fixedly set on the exterior of both the lower connecting block 1 and the upper connecting block 3.

[0028] Specifically, during installation, the lower connecting block 1 is first fixed to the top of the lower modular unit. Then, the upper connecting block 3 is fixed to the bottom of the upper modular unit. Subsequently, the upper module is hoisted and connected. The trapezoidal block 10 at the top of the lower connecting block 1 and the trapezoidal groove 9 at the bottom of the upper connecting block 3 automatically fit together. The inclined side of the trapezoidal structure forms a natural guide rail, which can quickly correct the horizontal offset of the upper and lower modules and ensure that the upper and lower connecting blocks 1 are accurately aligned, thus avoiding installation stagnation caused by misalignment of bolt hole 4 and threaded hole 7.

[0029] After the connection is in place, the multiple bolts 4 inside the lower connecting block 1 pass through the fixing holes 8 of the sealing gasket 2 in sequence and are tightened with the threaded holes 7 of the upper connecting block 3. As the bolts 4 are gradually tightened, the upper connecting block 3 and the lower connecting block 1 fit together vertically. The sealing gasket 2 is squeezed and tightly fills the gap to form a reliable sealing layer. The fixing groove 6 at the front end provides an operating channel for the wrench, which facilitates the efficient tightening of the bolts 4. The outer connecting steel 5 can be pre-welded or bolted to the main frame of the module to form a rigid connection.

[0030] The cooperation between trapezoidal block 10 and trapezoidal groove 9 reduces the time cost of manual alignment. The trapezoidal block 10 has rounded corners on all four sides and the top, which facilitates the convenient operation space provided by the fixing groove 6. This allows the device to adapt to the industrialized rapid construction needs of modular buildings. The interlocking of the trapezoidal structure not only achieves rapid positioning, but its lateral restraint can also resist relative slippage caused by horizontal loads. The evenly distributed fastening method of multiple bolts 4 and the overall reinforcement of the connecting steel 5 ensure that the load is evenly transferred to the main body of the module through the nodes, avoiding node deformation caused by local stress concentration. The sealing gasket 2 is evenly compressed during the bolt 4 fastening process, which can adapt to the small flatness error of the upper and lower connecting blocks 1 and form a continuous sealing interface. The sealing gasket 2 is made of EPDM foam material, which can effectively block rainwater and moisture intrusion. This design reduces the risk of bolt 4 corrosion, extends the service life of the joint, and avoids material fatigue caused by excessive compression. The entire assembly uses bolt 4 and trapezoidal block 10, eliminating the need for on-site welding, thus reducing material and energy consumption. All components can be prefabricated in the factory and produced in a standardized manner, reducing processing costs. Damaged components can be replaced individually during later maintenance, resulting in low repair costs. Furthermore, the components can be reused during building demolition or renovation, reducing resource waste and saving overall costs. During disassembly, bolt 4 is first loosened through the fixing groove 6, and then the modular hoisting equipment is used to lift it upwards, causing the trapezoidal block 10 to detach from the trapezoidal groove 9, thus completing non-destructive disassembly. Bolt 4 and sealing gasket 2 can be replaced and reused. Content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0031] Working principle: During installation, the lower connecting block 1 is first fixed to the top of the lower modular unit, and the upper connecting block 3 is fixed to the bottom of the upper modular unit. When the upper module is hoisted and connected, the trapezoidal block 10 at the upper end of the lower connecting block 1 and the trapezoidal groove 9 at the lower end of the upper connecting block 3 will cooperate. The guiding property of the trapezoidal block 10 can quickly correct the horizontal deviation between the upper connecting block 3 and the lower connecting block 1, ensuring that the upper connecting block 3 and the lower connecting block 1 are aligned and avoiding installation jamming caused by misalignment of the bolt holes.

[0032] After the connection is in place, the multiple bolts 4 built into the lower connecting block 1 are passed through the fixing holes 8 of the sealing gasket 2 and tightened with the threaded holes 7 of the upper connecting block 3. During the tightening of the bolts 4, the upper and lower connecting blocks 1 gradually come into contact, the sealing gasket 2 is compressed to achieve a seal, the fixing groove 6 provides operating space for tightening the bolts 4, and makes it easy for tools to be inserted for tightening. The connecting steel 5 is connected to the connecting block by welding or screws, thereby strengthening the integrity of the node and the module.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A node connection device for a modular prefabricated building, comprising a lower connecting block (1) and an upper connecting block (3), characterized in that: The lower connecting block (1) is provided with a sealing gasket (2) at its upper end. The sealing gasket (2) is provided with multiple fixing holes (8) through its upper end. The lower connecting block (1) is provided with multiple bolts (4) at its upper end. The lower connecting block (1) is fixedly provided with a trapezoidal block (10) at its upper end near the middle. The upper connecting block (3) has multiple threaded holes (7) at its lower end, and a trapezoidal groove (9) is provided at its lower end.

2. The node connection device for a modular prefabricated building according to claim 1, characterized in that: The upper end of the sealing gasket (2) is set at the lower end of the upper connecting block (3), and the outer sides of the multiple bolts (4) are respectively fitted inside the multiple fixing holes (8).

3. The node connection device for a modular prefabricated building according to claim 1, characterized in that: The upper ends of the bolts (4) are threaded to the upper ends of the threaded holes (7), and the trapezoidal block (10) is set inside the trapezoidal groove (9).

4. The node connection device for a modular prefabricated building according to claim 1, characterized in that: The lower connecting block (1) and the upper connecting block (3) are both provided with a fixing groove (6) at their front ends, and the upper ends of the multiple threaded holes (7) are set at the lower end of one of the two fixing grooves (6).

5. The node connection device for a modular prefabricated building according to claim 1, characterized in that: The lower outer ends of the multiple bolts (4) are all located at the upper end of one of the two fixing slots (6).

6. The node connection device for a modular prefabricated building according to claim 1, characterized in that: The upper end of the lower connecting block (1) is located at the lower end of the upper connecting block (3).

7. The node connection device for a modular prefabricated building according to claim 1, characterized in that: Multiple connecting steel bars (5) are fixedly installed on the exterior of both the lower connecting block (1) and the upper connecting block (3).

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