A crack-proof structure connecting mechanism for a fabricated house

Abstract

The utility model relates to the technical field of fabricated building, concretely relates to a kind of anti-crack structure connecting mechanism for fabricated house, comprising: first prefabricated component, second prefabricated component and rigid connecting piece, rigid connecting piece includes embedded sleeve, embedded sleeve is fixedly connected in the inside of first prefabricated component, the inside of embedded sleeve is screw-threaded connected with threaded rod, and the middle part of second prefabricated component is provided with the positioning hole for threaded rod to pass through;Flexible buffer assembly, flexible buffer assembly is sleeved in the outside of threaded rod, and flexible buffer assembly is clamped between the butt joint surface of first prefabricated component and second prefabricated component;Fixed component, fixed component includes washer, which is sleeved in the end of threaded rod that extends positioning hole, and fastening nut, which is screw-threaded connected with threaded rod, by setting flexible buffer assembly and rigid connecting piece between two prefabricated components, both the strength of structure connection is guaranteed, and component tiny displacement and deformation can be effectively absorbed, to prevent the generation and expansion of crack.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated building technology, specifically to a crack-resistant structural connection mechanism for prefabricated residential buildings. Background Technology

[0002] Prefabricated housing, with its significant advantages such as high construction efficiency, high degree of industrialization, and outstanding energy-saving and environmental protection performance, has become an important direction for promoting the modernization and upgrading of the construction industry. However, in actual engineering applications and long-term use, the connection nodes between prefabricated components, such as the joints between wall panels and floor slabs, often become weak links in structural safety and durability, and are prone to cracking, which seriously affects the overall performance of the building.

[0003] During the assembly and construction phase, dimensional deviations may occur in the production, transportation, hoisting, and on-site installation processes. This can lead to incomplete sealing of the joint surfaces of prefabricated components during assembly, resulting in initial defects. Such dimensional errors can cause uneven stress distribution at the joints when they are subjected to loads, with a significant increase in stress in some areas. This can induce micro-cracks at the component joints, which gradually expand into visible cracks over time.

[0004] During residential use, factors such as foundation settlement and temperature changes can cause slight displacement of components. Existing connection mechanisms are mostly based on the core design concept of "rigid fixation," which lacks effective buffering and deformation compensation capabilities. Rigid connection structures cannot absorb these displacements, which in turn leads to stress concentration and eventually cracks. It is difficult to fundamentally solve the crack problem, affecting the stability and service life of the residential structure. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a crack-resistant structural connection mechanism for prefabricated housing, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a crack-resistant structural connection mechanism for prefabricated housing, including: a first prefabricated component, a second prefabricated component and a rigid connector. The rigid connector includes an embedded sleeve, which is fixedly connected inside the first prefabricated component. A threaded rod is threadedly connected inside the embedded sleeve, and a positioning hole for the threaded rod to pass through is provided in the middle of the second prefabricated component. A flexible buffer assembly is sleeved on the outside of the threaded rod and sandwiched between the mating surfaces of the first prefabricated component and the second prefabricated component. The fixing component includes a washer fitted onto one end of the threaded rod that extends out of the positioning hole, and a fastening nut that is threadedly connected to the threaded rod.

[0007] Furthermore, the outer wall of the pre-embedded sleeve is fixedly connected with an annular anti-slip protrusion, which engages and is fixed to the concrete structure of the first precast component.

[0008] Furthermore, the embedded sleeve has an internal thread in the middle, and the internal thread is threaded to the threaded rod.

[0009] Furthermore, the flexible buffer component includes a first elastic rubber layer, a metal mesh skeleton layer, and a second elastic rubber layer, which are sequentially and fixedly connected.

[0010] Furthermore, the thickness of the first elastic rubber layer and the second elastic rubber layer is 3-5mm, and a wavy bonding surface is fixedly connected to the side of the first elastic rubber layer and the second elastic rubber layer near the precast component. The wavy bonding surface is tightly bonded to the mating surface of the precast component.

[0011] Furthermore, the metal mesh skeleton layer is made of galvanized steel wire mesh, and the edge of the metal mesh skeleton layer extends to the outside of the flexible buffer component to form a reinforcing edge.

[0012] Furthermore, the diameter of the positioning hole is 1-2 mm larger than the diameter of the threaded rod, and the inner wall of the positioning hole is provided with a wear-resistant coating, which is a polytetrafluoroethylene coating.

[0013] Furthermore, an elastic washer is provided between the washer and the second precast component. The elastic washer is sleeved on the outside of the threaded rod, and the elastic washer fits tightly with the washer and the second precast component.

[0014] The technical solution provided by this utility model has the following advantages compared with the known prior art: 1. By setting a flexible buffer assembly between two precast components and fixing it with rigid connectors, the strength of the structural connection is ensured, and the minor displacement and deformation of the components caused by foundation settlement, temperature changes, etc. are effectively absorbed. The elastic rubber layer and metal mesh skeleton layer in the flexible buffer assembly can disperse and buffer the stress at the joint, significantly reducing stress concentration, thereby fundamentally preventing the generation and propagation of cracks; 2. The annular anti-slip protrusions on the outer wall of the pre-embedded sleeve engage and fix with the concrete component, significantly enhancing the anchoring force. The elastic shims and washers added to the fixing components form elastic compression under the action of the tightening nut, effectively preventing the nut from loosening and ensuring that the connection node remains firm under dynamic loads and long-term vibration environments. The diameter of the positioning hole is slightly larger than the diameter of the threaded rod and is lined with a wear-resistant polytetrafluoroethylene coating, which facilitates adjustment and alignment during installation, adapts to dimensional deviations during construction, and reduces friction and wear between the threaded rod and the hole wall, ensuring the stability and reliability of the connection mechanism under long-term use. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall cross-sectional structure of this utility model; Figure 3 This is a schematic diagram of the embedded sleeve structure of this utility model; Figure 4 This is a schematic diagram of the fixing component structure of this utility model; Figure 5 This is a schematic diagram of the second prefabricated component structure of this utility model; Figure 6 This is a schematic diagram of the flexible buffer component structure of this utility model.

[0017] The labels in the diagram represent: 1. First prefabricated component; 2. Second prefabricated component; 201. Positioning hole; 202. Wear-resistant coating; 3. Rigid connector; 301. Embedded sleeve; 302. Annular anti-slip protrusion; 303. Internal thread; 304. Threaded rod; 4. Flexible buffer assembly; 401. First elastic rubber layer; 402. Metal mesh skeleton layer; 4021. Reinforcing edge; 403. Second elastic rubber layer; 404. Waist-shaped mating surface; 5. Fixing assembly; 501. Elastic gasket; 502. Washer; 503. Fastening nut. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0019] The present invention will be further described below with reference to the embodiments.

[0020] Example 1: Reference Figure 1-6This first embodiment of the present invention discloses a crack-resistant structural connection mechanism for prefabricated housing, comprising: a first prefabricated component 1, a second prefabricated component 2, and a rigid connector 3. The rigid connector 3 includes an embedded sleeve 301, which is fixedly connected inside the first prefabricated component 1. A threaded rod 304 is threadedly connected inside the embedded sleeve 301. A positioning hole 201 for the threaded rod 304 to pass through is provided in the middle of the second prefabricated component 2. A flexible buffer component 4 is sleeved on the outside of the threaded rod 304 and sandwiched between the mating surfaces of the first prefabricated component 1 and the second prefabricated component 2. A fixing component 5 includes a washer 502 sleeved on one end of the threaded rod 304 extending out of the positioning hole 201, and a fastening nut 503 threadedly connected to the threaded rod 304.

[0021] By setting a flexible buffer component 4 between two prefabricated components and fixing it with a rigid connector 3, the strength of the structural connection is ensured, and the small displacement and deformation of the components caused by foundation settlement, temperature change, etc. are effectively absorbed. The elastic rubber layer and metal mesh skeleton layer 402 in the flexible buffer component 4 can disperse and buffer the stress at the joint, significantly reduce the stress concentration phenomenon, and thus fundamentally prevent the generation and expansion of cracks.

[0022] Example 2: Reference Figure 1-6 This is the second embodiment of the present invention, which differs from the first embodiment in that: The outer wall of the pre-embedded sleeve 301 is fixedly connected with an annular anti-slip protrusion 302, which is engaged and fixed with the concrete structure of the first precast component 1. The middle part of the pre-embedded sleeve 301 is provided with an internal thread 303, which is threadedly connected to the threaded rod 304.

[0023] The flexible buffer component 4 includes a first elastic rubber layer 401, a metal mesh skeleton layer 402, and a second elastic rubber layer 403. The first elastic rubber layer 401, the metal mesh skeleton layer 402, and the second elastic rubber layer 403 are fixedly connected in sequence. The thickness of the first elastic rubber layer 401 and the second elastic rubber layer 403 is 3-5mm. A wavy bonding surface 404 is fixedly connected to the side of the first elastic rubber layer 401 and the second elastic rubber layer 403 near the precast component. The wavy bonding surface 404 is tightly bonded to the mating surface of the precast component. The metal mesh skeleton layer 402 is a galvanized steel wire mesh. The edge of the metal mesh skeleton layer 402 extends to the outside of the flexible buffer component 4 to form a reinforcing edge 4021.

[0024] The diameter of the positioning hole 201 is 1-2 mm larger than the diameter of the threaded rod 304. The inner wall of the positioning hole 201 is provided with a wear-resistant coating 202, which is a polytetrafluoroethylene coating. An elastic gasket 501 is also provided between the washer 502 and the second prefabricated component 2. The elastic gasket 501 is sleeved on the outside of the threaded rod 304, and the elastic gasket 501 is tightly fitted with the washer 502 and the second prefabricated component 2.

[0025] The annular anti-slip protrusion 302 on the outer wall of the pre-embedded sleeve 301 engages and is fixed with the concrete component, significantly enhancing the anchoring force. The elastic pads 501 and washers 502 added in the fixing component 5 form elastic compression under the action of the fastening nut 503, effectively preventing the nut from loosening and ensuring that the connection node remains firm under dynamic load and long-term vibration environment. The diameter of the positioning hole 201 is slightly larger than the diameter of the threaded rod 304 and is lined with a polytetrafluoroethylene wear-resistant coating 202, which not only facilitates the adjustment of alignment during installation and adapts to dimensional deviations during construction, but also reduces the friction and wear between the threaded rod 304 and the hole wall, ensuring the stability and reliability of the connection mechanism under long-term use.

[0026] The remaining structure is the same as that in Example 1.

[0027] The workflow of this utility model is as follows: First, during the prefabrication process of the first prefabricated component 1, the embedded sleeve 301 is engaged and fixed with the concrete structure through the annular anti-slip protrusion 302 on its outer wall to ensure that the embedded sleeve 301 is firmly embedded inside the first prefabricated component 1. A positioning hole 201 is pre-opened at the corresponding position of the second prefabricated component 2, and a polytetrafluoroethylene wear-resistant coating 202 is coated on the inner wall of the positioning hole 201. Secondly, during on-site installation, the first prefabricated component 1 and the second prefabricated component 2 are aligned and positioned so that the axis of the embedded sleeve 301 is aligned with the positioning hole 201 of the second prefabricated component 2. The flexible buffer component 4 is sleeved on the threaded rod 304, and one end of the threaded rod 304 with the flexible buffer component 4 is passed through the positioning hole 201 of the second prefabricated component 2. At the same time, the flexible buffer component 4 is placed between the mating surfaces of the first prefabricated component 1 and the second prefabricated component 2. The other end of the threaded rod 304 is screwed into the internal thread 303 of the embedded sleeve 301. The two prefabricated components are initially tightened by rotating the threaded rod 304. Finally, elastic washers 501 and 502 are sequentially fitted onto the end of the threaded rod 304 that extends out of the positioning hole 201, and then the fastening nut 503 is tightened. Through the tightening force of the fastening nut 503, the elastic washers 501 and 502 are pressed against the surface of the second precast component 2 to form an elastic compression connection. The wavy contact surface 404 of the flexible buffer component 4 is tightly fitted with the mating surface of the two precast components. The reinforcing edge 4021 of the metal mesh skeleton layer 402 further enhances the stability of the connection. After installation, the flexible buffer component 4 can absorb the small displacement and deformation between the components, while the rigid connector 3 and the fixing component 5 together ensure the structural strength of the connection and effectively prevent the generation and expansion of cracks.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A crack-resistant structural connection mechanism for prefabricated housing, characterized in that, include: The first prefabricated component (1), the second prefabricated component (2), and the rigid connector (3) are provided. The rigid connector (3) includes an embedded sleeve (301), which is fixedly connected to the inside of the first prefabricated component (1). A threaded rod (304) is threadedly connected inside the embedded sleeve (301). A positioning hole (201) for the threaded rod (304) to pass through is provided in the middle of the second prefabricated component (2). A flexible buffer assembly (4) is sleeved on the outside of the threaded rod (304) and sandwiched between the mating surfaces of the first prefabricated component (1) and the second prefabricated component (2). The fixing component (5) includes a washer (502) sleeved on one end of the threaded rod (304) extending out of the positioning hole (201) and a fastening nut (503) threadedly connected to the threaded rod (304).

2. The anti-crack structural connection mechanism for prefabricated housing according to claim 1, characterized in that, The outer wall of the pre-embedded sleeve (301) is fixedly connected with an annular anti-slip protrusion (302), which is engaged and fixed with the concrete structure of the first precast component (1).

3. The anti-crack structural connection mechanism for prefabricated housing according to claim 1, characterized in that, The embedded sleeve (301) has an internal thread (303) in the middle, and the internal thread (303) is threadedly connected to the threaded rod (304).

4. The anti-crack structural connection mechanism for prefabricated housing according to claim 1, characterized in that, The flexible buffer component (4) includes a first elastic rubber layer (401), a metal mesh skeleton layer (402), and a second elastic rubber layer (403), which are sequentially fixedly connected.

5. A crack-resistant structural connection mechanism for prefabricated housing according to claim 4, characterized in that, The thickness of the first elastic rubber layer (401) and the second elastic rubber layer (403) is 3-5mm. The first elastic rubber layer (401) and the second elastic rubber layer (403) are fixedly connected to a wavy bonding surface (404) on the side near the precast component. The wavy bonding surface (404) is tightly bonded to the mating surface of the precast component.

6. The anti-crack structural connection mechanism for prefabricated housing according to claim 4, characterized in that, The metal mesh skeleton layer (402) is a galvanized steel wire mesh, and the edge of the metal mesh skeleton layer (402) extends to the outside of the flexible buffer component (4) to form a reinforcing edge (4021).

7. A crack-resistant structural connection mechanism for prefabricated housing according to claim 1, characterized in that, The diameter of the positioning hole (201) is 1-2 mm larger than the diameter of the threaded rod (304). The inner wall of the positioning hole (201) is provided with a wear-resistant coating (202), which is a polytetrafluoroethylene coating.

8. A crack-resistant structural connection mechanism for prefabricated housing according to claim 1, characterized in that, An elastic gasket (501) is also provided between the washer (502) and the second prefabricated component (2). The elastic gasket (501) is sleeved on the outside of the threaded rod (304). The elastic gasket (501) is tightly fitted with the washer (502) and the second prefabricated component (2).

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