Prefabricated wall connecting device

Abstract

The utility model relates to a prefabricated wall body connecting device which comprises a fixing rib fixedly connected with a steel bar in a prefabricated wall body and further comprises a pair of embedded sleeves embedded in the prefabricated wall body, and an expansion connecting piece used for connecting the embedded sleeves together is arranged between the two embedded sleeves. The expansion connecting piece comprises a connecting table and expansion pipes fixed to the two ends of the connecting table, and a plurality of expansion grooves are formed in the expansion pipes at intervals. An expansion terminal is movably mounted in the embedded sleeve; the expansion terminal is inserted into the expansion pipe, so that the expansion pipe is opened and locked in the embedded sleeve, and cracks caused by damage due to large extrusion or tensioning of the two prefabricated wall bodies under the condition of expansion with heat and contraction with cold can be reduced.

Description

Technical Field

[0001] The utility model relates to a prefabricated wall connecting device, belonging to the technical field of wall connection. Background Art

[0002] With the development of the times, prefabricated buildings have become a common product in our daily life. They can shorten the construction period, save building materials, reduce environmental pollution and other benefits. During the construction process of prefabricated buildings, two prefabricated walls need to be connected together. In the traditional connection structure, steel bars are usually inserted into the reserved holes in the concrete, and then the two prefabricated walls are connected together after pouring concrete mortar. After the two walls are connected, cracks are easily generated at the joints under the condition of thermal expansion and contraction, which affects the appearance of the wall.

[0003] Chinese patent CN116876671A discloses an upper and lower wall connection structure and construction method of an assembled shear wall, which connects the upper prefabricated wall with the lower prefabricated wall through a first connecting member and a second connecting member, the first connecting member and the second connecting member are specifically vertical steel bars and stirrups, and the connection structure is preferably cast with fine stone concrete; therefore, there is a problem of cracks occurring at the connection due to thermal expansion and contraction after the walls are connected. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model provides a prefabricated wall connection device, which can reduce the damage and cracks caused by large extrusion or tension between two prefabricated walls due to thermal expansion and contraction.

[0005] The technical solution of the utility model is as follows:

[0006] A prefabricated wall connection device comprises two fixing bars fixedly connected to the steel bars in two prefabricated walls, and also comprises a pair of embedded sleeves embedded in the prefabricated wall, wherein the two fixing bars are respectively arranged on the opposite sides of the two embedded sleeves, and an expansion connector for connecting the embedded sleeves together is arranged between the two embedded sleeves; the expansion connector comprises a connecting platform, an expansion tube fixed at both ends of the connecting platform, and a plurality of expansion grooves are arranged on the expansion tube at intervals; an expansion terminal is movably installed in the embedded sleeve; the expansion terminal is inserted into the expansion tube so that the expansion tube is opened and locked in the embedded sleeve.

[0007] A support column is fixed to one end of the expansion terminal away from the expansion connector, and a support platform is fixed to one end of the support column away from the expansion terminal. The support platform is movably installed inside the embedded sleeve.

[0008] Wherein, a limiting protrusion is fixed on one end of the expansion tube close to the embedded sleeve; the limiting protrusion locks the expansion terminal inside the expansion tube.

[0009] Wherein, a side of the limiting protrusion close to the expansion terminal is an inclined surface.

[0010] Wherein, the expansion terminal is a truncated cone structure with one end larger than the other end.

[0011] Among them, the inner hole of the embedded sleeve is a truncated cone-shaped cavity with one end larger than the other end; the diameter of the end of the inner hole close to the expansion connector is larger than the outer diameter of the expansion tube when it is not expanded, and smaller than the outer diameter of the expansion tube after expansion; the diameter of the end of the inner hole away from the expansion connector is larger than the outer diameter of the expansion tube after expansion.

[0012] Wherein, a plurality of protrusions are fixed on the outer side of the embedded sleeve.

[0013] Wherein, the gaps between the prefabricated walls are filled with asphalt.

[0014] The utility model has the following beneficial effects:

[0015] The utility model brings two prefabricated walls close to each other, and the two ends of the expansion connector are respectively inserted into the embedded sleeves embedded in the two prefabricated walls. The expansion tube is opened under the action of the expansion terminal, and a locking force is generated between the expansion tube and the embedded sleeve; the expansion terminal is movably installed in the embedded sleeve, and a certain movable distance can be allowed between the two prefabricated walls, thereby reducing the possibility of large extrusion or tension of the two prefabricated walls in the case of thermal expansion and contraction, thereby reducing the possibility of damage and cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the expansion connector of the utility model.

[0019] The reference numerals in the figure are as follows:

[0020] 1. Embedded sleeve; 11. Expansion terminal; 12. Support column; 13. Support platform; 14. Limiting protrusion; 15. Protrusion; 16. Fixing rib; 2. Expansion connector; 21. Connecting platform; 22. Expansion tube; 23. Expansion groove. DETAILED DESCRIPTION

[0021] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] See also Figures 1 to 3 , the utility model provides a technical solution:

[0023] A prefabricated wall connection device comprises a fixing rib 16 fixedly connected to a steel bar in a prefabricated wall, and also comprises a pair of embedded sleeves 1 embedded in the prefabricated wall, an expansion connector 2 for connecting the embedded sleeves 1 together is arranged between the two embedded sleeves 1; the expansion connector 2 comprises a connecting platform 21, an expansion tube 22 fixed at both ends of the connecting platform 21, a plurality of expansion grooves 23 are arranged at intervals on the expansion tube 22, the plurality of expansion grooves 23 are arranged at one end of the expansion tube 22 away from the connecting platform 21, and the expansion grooves 23 divide the expansion tube 22 into a plurality of sheet-like components; an expansion terminal 11 is movably installed in the embedded sleeve 1; the expansion terminal 11 is inserted into the expansion tube 22 to open and lock the expansion tube 22 in the embedded sleeve 1, and when the expansion terminal 11 is inserted into the expansion tube 22, a plurality of sheet-like components will expand outwards due to the compression of the internal expansion terminal 11, so that the expansion tube 22 can be opened and locked in the embedded sleeve 1.

[0024] Specifically, the expansion terminal 11 is a truncated cone-shaped structure with one end larger than the other end, and the inner hole of the embedded sleeve 1 is a truncated cone-shaped cavity with one end larger than the other end; the diameter of the end of the inner hole close to the expansion connector 2 is larger than the outer diameter of the expansion tube 22 when it is not expanded, and smaller than the outer diameter of the expansion tube 22 after expansion; the diameter of the end of the inner hole away from the expansion connector 2 is larger than the outer diameter of the expansion tube 22 after expansion; when the expansion tube 22 cannot be pulled out of the embedded sleeve 1 after expansion, the two prefabricated walls can be locked together.

[0025] The end of the expansion terminal 11 away from the expansion connector 2 is fixed with a support column 12, and the end of the support column 12 away from the expansion terminal 11 is fixed with a support platform 13, and the support platform 13 is movably installed inside the embedded sleeve 1; specifically, the support platform 13 has a certain elasticity, and the support platform 13 can be retracted into the embedded sleeve 1 for a distance when the expansion terminal 11 is under pressure. When the expansion tube 22 is sleeved on the outside of the expansion terminal 11, since the expansion terminal 11 is a truncated cone structure with one end larger and the other end smaller, when the expansion tube 22 is gradually embedded in the sleeve 1, the expansion tube 22 will be expanded under the action of the larger end of the expansion terminal 11 to achieve expansion. effect; when the expansion tube 22 expands, it is unable to completely cover the expansion terminal 11 due to the action of the inner wall of the embedded sleeve 1. Therefore, the support platform 13 retracts inward for a distance, allowing the expansion tube 22 to enter the end with a larger diameter of the embedded sleeve 1, so that the expansion tube 22 can completely cover the expansion terminal 11. At the same time, after the installation is completed, the support platform 13 rebounds, and the outer wall of the expansion tube 22 can be engaged with the inner wall of the embedded sleeve 1 and cannot be separated; when the two prefabricated walls are assembled together, the expansion terminal 11 is completely embedded in the expansion tube 22 under the action of the support column 12 and the support platform 13, so that the expansion tube 22 is in an expanded state and is not separated from the embedded sleeve 1.

[0026] A limiting protrusion 14 is fixed to one end of the expansion tube 22 close to the embedded sleeve 1; the limiting protrusion 14 locks the expansion terminal 11 inside the expansion tube 22, and the side of the limiting protrusion 14 close to the expansion terminal 11 is an inclined surface. Since the expansion terminal 11 is a frustum structure, when the expansion tube 22 completely covers the expansion terminal 11, the limiting protrusion 14 can be hooked on the bottom of the expansion terminal 11, so that the expansion tube 22 can be quickly positioned and locked with the expansion terminal 11.

[0027] As a preferred embodiment, a plurality of protrusions 15 are fixed on the outer side of the embedded sleeve 1; the protrusions 15 increase the contact area with the prefabricated wall.

[0028] The gaps between prefabricated walls are filled with asphalt; when the prefabricated walls expand and contract due to heat, the asphalt has a certain elasticity, which reduces the cracking of the wall.

[0029] The working principle of the above-mentioned prefabricated wall connection device is as follows:

[0030] The expansion tubes 22 at both ends of the expansion connector 2 are respectively inserted into the embedded sleeves 1 in the two prefabricated walls. At this time, the interior of the expansion tube 22 is squeezed by the expansion terminal 11. After entering the embedded sleeve 1, the expansion tube 22 expands and hooks the bottom of the expansion terminal 11 through the limiting protrusion 14, so that the expansion connector 2 is fixedly connected to the embedded sleeve 1, and the gap between the two prefabricated walls is filled with asphalt. The expansion terminal 11 is movably installed in the embedded sleeve 1, and a certain movable distance can be left between the two prefabricated walls, thereby reducing the possibility of large squeezing or tensioning of the two prefabricated walls due to thermal expansion and contraction, thereby reducing the possibility of damage and cracks.

[0031] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A prefabricated wall connection device, comprising two fixing bars (16) fixedly connected to two steel bars in the prefabricated wall, characterized in that: It also comprises a pair of embedded sleeves (1) embedded in the prefabricated wall, the two fixing ribs (16) are respectively arranged on opposite sides of the two embedded sleeves (1), and an expansion connector (2) for connecting the embedded sleeves (1) together is arranged between the two embedded sleeves (1); the expansion connector (2) comprises a connecting platform (21), an expansion tube (22) fixed at both ends of the connecting platform (21), and a plurality of expansion grooves (23) are arranged at intervals on the expansion tube (22); an expansion terminal (11) is movably installed in the embedded sleeve (1); the expansion terminal (11) is inserted into the expansion tube (22) so that the expansion tube (22) is opened and locked in the embedded sleeve (1).

2. A prefabricated wall connection device according to claim 1, characterized in that: A support column (12) is fixed to one end of the expansion terminal (11) away from the expansion connector (2), and a support platform (13) is fixed to one end of the support column (12) away from the expansion terminal (11). The support platform (13) is movably mounted inside the embedded sleeve (1).

3. A prefabricated wall connection device according to claim 1, characterized in that: A limiting protrusion (14) is fixed to one end of the expansion tube (22) close to the embedded sleeve (1); the limiting protrusion (14) locks the expansion terminal (11) inside the expansion tube (22).

4. A prefabricated wall connection device as claimed in claim 3, characterized in that: The side of the limiting protrusion (14) close to the expansion terminal (11) is an inclined surface.

5. A prefabricated wall connection device according to claim 1, characterized in that: The expansion terminal (11) is a truncated cone-shaped structure with one end being larger than the other end.

6. A prefabricated wall connection device according to claim 1, characterized in that: The inner hole of the embedded sleeve (1) is a truncated cone-shaped cavity with one end larger than the other end; the diameter of the end of the inner hole close to the expansion connector (2) is larger than the outer diameter of the expansion tube (22) when it is not expanded, and smaller than the outer diameter of the expansion tube (22) after expansion; the diameter of the end of the inner hole away from the expansion connector (2) is larger than the outer diameter of the expansion tube (22) after expansion.

7. A prefabricated wall connection device according to claim 1, characterized in that: A plurality of protrusions (15) are fixed on the outer side of the embedded sleeve (1).

8. A prefabricated wall connection device according to claim 1, characterized in that: The gaps between the prefabricated walls are filled with asphalt.

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