Prefabricated wall connection structure

Abstract

The present invention belongs to the field of prefabricated building assembly technology, and specifically relates to a prefabricated wall connection structure for connecting a prefabricated wall with a lower floor slab, comprising: a tie rod, which is pre-buried in the lower floor slab and protrudes above the lower floor slab in the vertical direction; a tensioning mechanism, which is pre-buried in the prefabricated wall, and the tensioning mechanism is assembled to enable the tie rod to pass through the tensioning mechanism from bottom to top, and to prevent the tie rod from moving from top to bottom relative to the tensioning mechanism. During the hoisting and lowering process of the prefabricated wall of the present invention, the tie rod on the lower floor slab can pass through the tensioning mechanism from bottom to top, and when the bottom surface of the prefabricated wall is in contact with the lower floor slab, the tensioning mechanism can prevent the tie rod from being withdrawn from the prefabricated wall, thereby enabling the prefabricated wall to be stably connected to the lower floor slab without any external support, providing convenience for subsequent pouring, simplifying the prefabricated wall assembly operation process, and improving assembly efficiency and assembly quality.

Description

Technical Field

[0001] The invention belongs to the technical field of prefabricated building assembly, and in particular relates to a prefabricated wall connection structure. Background Art

[0002] In the prior art, the connection nodes between prefabricated walls and floor slabs are mainly connected by pre-embedded tie bars. First, vertical steel bars are pre-embedded in the floor slab, and casting holes are reserved at the bottom of the prefabricated wall. Then, the prefabricated wall is hoisted into place using hoisting equipment, and the steel bars are inserted into the casting holes. Then, the casting holes are grouted to achieve the connection between the prefabricated wall and the floor slab.

[0003] The existing technology mainly has the following defects. First, the orientation needs to be repeatedly corrected during the hoisting process of the prefabricated wall to ensure that the casting holes are aligned with the steel bars. Manual support is required during the hoisting process, which poses a safety hazard. Second, after the prefabricated wall is hoisted into place, due to the lack of effective connection between the prefabricated wall and the floor slab, a bracket is required to temporarily support the prefabricated wall before pouring. After the pouring is completed, the bracket needs to be removed, and the operation process is cumbersome. Third, the casting holes are empty on the steel bars, and the steel bars do not form a certain pre-tightening force. Affected by the season, the steel bars expand and contract due to heat and cold, which will reduce the tensile effect of the steel bars and affect the quality of the building. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a prefabricated wall connection structure, which can tighten the embedded steel bars after the prefabricated wall is hoisted into place, thereby achieving temporary support and providing a certain pre-tightening force for the steel bars, thereby improving assembly efficiency and assembly quality.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a prefabricated wall connection structure for connecting a prefabricated wall and a lower floor slab, comprising:

[0006] Tie bars are pre-buried in the lower floor slab and protrude above the lower floor slab in a vertical direction;

[0007] A tensioning mechanism is embedded in the prefabricated wall, and is configured to enable the tensioning bar to pass through the tensioning mechanism from bottom to top and to prevent the tensioning bar from moving from top to bottom relative to the tensioning mechanism.

[0008] In an optional embodiment of the present invention, an embedded box is provided in the prefabricated wall, and the tensioning mechanism comprises:

[0009] A base, installed in the embedded box;

[0010] A movable seat, movably connected to the base along a vertical direction;

[0011] A clamping block is movably connected to the movable seat in a horizontal direction, and there are two clamping blocks, which are symmetrically opened and closed;

[0012] The ends of the two clamping blocks that are away from each other are provided with a first wedge-shaped surface, and the base is provided with a second wedge-shaped surface that matches the first wedge-shaped surface, and the first wedge-shaped surface and the second wedge-shaped surface are assembled so that when the movable seat moves downward relative to the base, the two clamping blocks can be clamped to each other under the action of the first wedge-shaped surface and the second wedge-shaped surface;

[0013] Semicircular grooves are arranged on the opposite end surfaces of the two clamping blocks, and the two semicircular grooves constitute a channel for the tensioning rod to pass through; through holes for the tensioning rod to pass through are respectively arranged on the embedded box, the base and the movable seat.

[0014] In an optional embodiment of the present invention, an elastic unit is provided between the movable seat and the embedded box, and the elastic unit is configured so that the elastic force acting on the movable seat can cause the movable seat to have a tendency to move downward.

[0015] In an optional embodiment of the present invention, the base is movably connected to the embedded box in a vertical direction, and a pre-tightening mechanism is provided between the base and the embedded box, and the pre-tightening mechanism is configured to drive the base to move upward relative to the embedded box.

[0016] In an optional embodiment of the present invention, the pre-tightening mechanism includes a driving frame, which is movably connected to the embedded box in a horizontal direction, and the driving frame is provided with a third wedge surface, and the base is provided with a fourth wedge surface that matches the third wedge surface, and the third wedge surface and the fourth wedge surface are assembled to drive the base to move upward when the driving frame moves in the horizontal direction; and also includes a driving mechanism for driving the driving frame to move in the horizontal direction.

[0017] In an optional embodiment of the present invention, the driving mechanism includes a bolt, and the driving frame is provided with a screw hole that matches the thread of the bolt, one end of the bolt abuts against the side wall of the movable seat or the embedded box, and the other end of the bolt is exposed on the side wall of the prefabricated wall.

[0018] In an optional embodiment of the present invention, a grouting hole is reserved in the prefabricated wall, and the grouting hole includes a first section and a second section, the first section passes through from the bottom surface of the prefabricated wall to the bottom wall of the embedded box, and the first section is coaxial with the through hole on the embedded box for the reinforcement to pass through, and the second section passes through from the top wall of the embedded box to the side wall of the prefabricated wall; the first section is also connected to a casting hole that passes through the side wall of the prefabricated wall.

[0019] In an optional embodiment of the present invention, a water retaining weir is provided in the area of ​​the lower floor slab for connecting the prefabricated wall, and a limiting groove consistent with the contour of the water retaining weir is provided on the bottom surface of the prefabricated wall, and the water retaining weir and the limiting groove are interlocked.

[0020] In an optional embodiment of the present invention, the cross-sectional shape of the water retaining weir is trapezoidal.

[0021] In an optional embodiment of the present invention, a positioning block is provided on the top of the water retaining weir, a positioning groove cooperating with the positioning block is provided in the limiting groove, the positioning block and the positioning groove are interlocked with each other, and the cross-sectional shape of the positioning block is trapezoidal.

[0022] The technical effect of the present invention is that during the hoisting and lowering process of the prefabricated wall of the present invention, the tensioning bars on the lower floor slab can pass through the tensioning mechanism from bottom to top, and when the bottom surface of the prefabricated wall is in contact with the lower floor slab, the tensioning mechanism can prevent the tensioning bars from being withdrawn from the prefabricated wall, thereby enabling the prefabricated wall to be stably connected to the lower floor slab without the aid of any external support, providing convenience for subsequent pouring, simplifying the prefabricated wall assembly operation process, and improving assembly efficiency and assembly quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the connection structure between the prefabricated wall and the lower floor slab provided by an embodiment of the present invention;

[0024] Figure 2 is a front view of a connection structure between a prefabricated wall and a lower floor slab provided by an embodiment of the present invention;

[0025] Figure 3 yes Figure 2 AA section view;

[0026] Figure 4 yes Figure 3 BB cross-sectional view;

[0027] Figure 5 yes Figure 4 CC section view;

[0028] Figure 6 is a three-dimensional diagram of a prefabricated wall provided by an embodiment of the present invention;

[0029] Figure 7 is a partial stereoscopic diagram of a lower floor provided by an embodiment of the present invention;

[0030] Figure 8 It is an exploded view of the tensioning mechanism provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic manner, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0033] See also Figure 1-8 As shown, the present invention provides a prefabricated wall connection structure for connecting a prefabricated wall 10 with a lower floor 20, comprising a tie bar 21 and a tensioning mechanism, wherein the tie bar 21 is pre-buried in the lower floor 20 and protrudes above the lower floor 20 in the vertical direction; the tensioning mechanism is pre-buried in the prefabricated wall 10, and the tensioning mechanism is configured to enable the tie bar 21 to pass through the tensioning mechanism from bottom to top, and to prevent the tie bar 21 from moving from top to bottom relative to the tensioning mechanism. In a specific embodiment, the tensioning mechanism is provided with two rows, and the two rows of tie bars 21 are arranged at intervals along the width direction of the prefabricated wall 10.

[0034] During the hoisting and lowering process of the prefabricated wall 10 of the present invention, the tie rods 21 on the lower floor slab 20 can pass through the tensioning mechanism from bottom to top, and when the bottom surface of the prefabricated wall 10 is in contact with the lower floor slab 20, the tensioning mechanism can prevent the tie rods 21 from being withdrawn from the prefabricated wall 10, thereby enabling the prefabricated wall 10 to be stably connected to the lower floor slab 20 without the aid of any external support, providing convenience for subsequent pouring, simplifying the assembly operation process of the prefabricated wall 10, and improving assembly efficiency and assembly quality.

[0035] See also Figure 3 , 4As shown in Figure 8, in an optional embodiment of the present invention, an embedded box 30 is provided in the prefabricated wall 10, and the tensioning mechanism includes a base 31, a movable seat 32 and a clamping block 33; the base 31 is installed in the embedded box 30; the movable seat 32 is movably connected to the base 31 in the vertical direction; the clamping block 33 is movably connected to the movable seat 32 in the horizontal direction, and there are two clamping blocks 33, and the two clamping blocks 33 are symmetrically opened and closed; the ends of the two clamping blocks 33 that are far away from each other are provided with a first wedge-shaped surface, and ... 1 is provided with a second wedge-shaped surface that cooperates with the first wedge-shaped surface, and the first wedge-shaped surface and the second wedge-shaped surface are assembled so that when the movable seat 32 moves downward relative to the base 31, the two clamping blocks 33 can clamp each other under the action of the first wedge-shaped surface and the second wedge-shaped surface; semicircular grooves are provided on the opposite end surfaces of the two clamping blocks 33, and the two semicircular grooves constitute a channel for the tensioning bar 21 to pass through; the embedded box 30, the base 31 and the movable seat 32 are respectively provided with through holes for the tensioning bar 21 to pass through.

[0036] See also Figure 3 As shown, it can be understood that the first wedge surface and the second wedge surface are arranged in an inverted eight-shaped shape, so when the reinforcement 21 is inserted from bottom to top, the clamping block 33 and the movable seat 32 tend to move upward under the action of friction. At this time, there is no interaction force between the first wedge surface and the second wedge surface, and the clamping block 33 can be separated to both sides, so it will not hinder the insertion of the reinforcement 21. When the reinforcement 21 tends to move downward relative to the tensioning mechanism, the clamping block 33 and the movable seat 32 move downward under the action of friction. At this time, the first wedge surface and the second wedge surface conflict with each other, so that the two clamping blocks 33 clamp the reinforcement 21. The stronger the downward movement tendency of the reinforcement 21 is, the greater the clamping force of the two clamping blocks 33 is, thereby forming a self-locking, thereby preventing the reinforcement 21 from being withdrawn from the tensioning mechanism.

[0037] See also Figure 3 , 4 As shown in Figures 8 and 9, in an optional embodiment of the present invention, an elastic unit 34 is provided between the movable seat 32 and the embedded box 30, and the elastic unit 34 is configured so that the elastic force acting on the movable seat 32 can cause the movable seat 32 to have a tendency to move downward. It can be understood that the elastic unit 34 can keep the movable seat 32 and the clamping block 33 at a lower position, that is, ensure that the first wedge surface and the second wedge surface are always in contact, and when the tie bar 21 just has a tendency to move downward, the first wedge surface and the second wedge surface can quickly interact with each other to clamp the tie bar 21, thereby avoiding the formation of a gap between the prefabricated wall 10 and the lower floor slab 20.

[0038] Please refer to Figures 3, 4, and 8. In an optional embodiment of the present invention, the base 31 is movably connected to the embedded box 30 in the vertical direction, and a pre-tightening mechanism is further provided between the base 31 and the embedded box 30. The pre-tightening mechanism is configured to be able to drive the base 31 to move upward relative to the embedded box 30. Specifically, the pre-tightening mechanism includes a drive frame 35, which is movably connected to the embedded box 30 in the horizontal direction, a third wedge-shaped surface is provided on the drive frame 35, and a fourth wedge-shaped surface matching the third wedge-shaped surface is provided on the base 31. The third wedge-shaped surface and the fourth wedge-shaped surface are configured to be able to drive the base 31 to move upward when the drive frame 35 moves in the horizontal direction; and also includes a drive mechanism for driving the drive frame 35 to move in the horizontal direction. The driving mechanism includes a bolt 36 , and a screw hole threadedly matched with the bolt 36 is provided on the driving frame 35 . One end of the bolt 36 abuts against the side wall of the movable seat 32 or the embedded box 30 , and the other end of the bolt 36 is exposed on the side wall of the prefabricated wall 10 .

[0039] It is understandable that the tie rod 21 will produce a certain amount of stretching after being stressed. Therefore, if the tensioning mechanism is always in a fixed position, it is still possible that a gap will be generated between the prefabricated wall 10 and the lower floor slab 20. For this reason, the present invention also provides a pre-tightening mechanism. When the prefabricated wall 10 is hoisted in place, the tensioning mechanism can be lifted up a distance by bolts 36 before the hoisting equipment is removed, thereby causing the tie rod 21 to produce a certain pre-tightening force, further avoiding the generation of gaps. At the same time, due to the existence of the pre-tightening force, the tie rod 21 can be prevented from loosening due to thermal expansion and contraction after the prefabricated wall 10 is used for a long time, thereby improving the reliability of the prefabricated building.

[0040] See also Figure 3 As shown, in an optional embodiment of the present invention, a grouting hole is reserved in the prefabricated wall 10, and the grouting hole includes a first section 11 and a second section 12. The first section 11 passes through from the bottom surface of the prefabricated wall 10 to the bottom wall of the embedded box 30, and the first section 11 is coaxial with the through hole on the embedded box 30 for the reinforcement 21 to pass through, and the second section 12 passes through from the top wall of the embedded box 30 to the side wall of the prefabricated wall 10; the first section 11 is also connected to a casting hole 13 that passes through the side wall of the prefabricated wall 10.

[0041] After the prefabricated wall 10 is connected to the lower floor slab 20, cement slurry can be injected through the pouring hole 13, and the cement slurry fills the first section 11, the embedded box 30 and the second section 12 from bottom to top. When the cement slurry overflows from the outlet of the second section 12, it means that the slurry is full, so as to remind the staff to stop grouting. The tensioning device of the present invention is finally completely sealed by cement to avoid loosening due to mechanical fatigue.

[0042] See also Figure 3 , 7 As shown, in an optional embodiment of the present invention, a water retaining weir 22 is provided in the area of ​​the lower floor 20 for connecting the prefabricated wall 10, and a limiting groove 14 consistent with the contour of the water retaining weir is provided on the bottom surface of the prefabricated wall 10, and the water retaining weir 22 and the limiting groove 14 are interlocked. Specifically, the cross-sectional shape of the water retaining weir 22 is a trapezoid, and a positioning block 23 is provided on the top of the water retaining weir 22, and a positioning groove 15 cooperating with the positioning block 23 is provided in the limiting groove 14, and the positioning block 23 and the positioning groove 15 are interlocked, and the cross-sectional shape of the positioning block 23 is a trapezoid. It can be understood that the water retaining weir 22 can improve the waterproof performance of the joint on the one hand, and on the other hand, it can also cooperate with the positioning block 23 to realize the automatic alignment of the prefabricated wall 10, reduce the difficulty of hoisting, and improve the hoisting efficiency.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0044] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0045] References throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout this specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be possible in light of the teachings herein and are to be considered part of the spirit and scope of the invention.

[0046] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0047] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0048] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0049] The above description of the illustrated embodiments of the present invention (including the contents described in the Abstract) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and appreciated by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments described in the present invention, and these modifications will be within the spirit and scope of the present invention.

[0050] Systems and methods have been generally described herein as details that aid in understanding the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or may be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of embodiments of the present invention.

[0051] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Thus, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. A prefabricated wall connection structure, characterized in that: Used to connect precast walls and lower floors, including: Tie bars are pre-buried in the lower floor slab and protrude above the lower floor slab in a vertical direction; A tensioning mechanism, embedded in the prefabricated wall, the tensioning mechanism being configured to enable the tensioning bar to pass through the tensioning mechanism from bottom to top and to prevent the tensioning bar from moving from top to bottom relative to the tensioning mechanism; The prefabricated wall is provided with an embedded box, and the tensioning mechanism comprises: A base, installed in the embedded box; A movable seat, movably connected to the base along a vertical direction; A clamping block is movably connected to the movable seat in a horizontal direction, and there are two clamping blocks, which are symmetrically opened and closed; The ends of the two clamping blocks that are away from each other are provided with a first wedge-shaped surface, and the base is provided with a second wedge-shaped surface that matches the first wedge-shaped surface, and the first wedge-shaped surface and the second wedge-shaped surface are assembled so that when the movable seat moves downward relative to the base, the two clamping blocks can be clamped to each other under the action of the first wedge-shaped surface and the second wedge-shaped surface; Semicircular grooves are provided on the opposite end surfaces of the two clamping blocks, and the two semicircular grooves constitute a passage for the tensioning bar to pass through; through holes for the tensioning bar to pass through are respectively provided on the embedded box, the base and the movable seat; An elastic unit is provided between the movable seat and the embedded box, and the elastic unit is configured so that the elastic force acting on the movable seat can cause the movable seat to have a tendency to move downward; The base is movably connected to the embedded box in a vertical direction, and a pre-tightening mechanism is provided between the base and the embedded box, and the pre-tightening mechanism is configured to drive the base to move upward relative to the embedded box; The pre-tightening mechanism includes a driving frame, which is movably connected to the embedded box in a horizontal direction, a third wedge-shaped surface is provided on the driving frame, and a fourth wedge-shaped surface matching the third wedge-shaped surface is provided on the base, and the third wedge-shaped surface and the fourth wedge-shaped surface are assembled to drive the base to move upward when the driving frame moves in the horizontal direction; and also includes a driving mechanism for driving the driving frame to move in the horizontal direction.

2. The prefabricated wall connection structure according to claim 1, characterized in that: The driving mechanism comprises a bolt, and a screw hole matched with the thread of the bolt is provided on the driving frame, one end of the bolt abuts against the side wall of the movable seat or the embedded box, and the other end of the bolt is exposed on the side wall of the prefabricated wall.

3. The prefabricated wall connection structure according to claim 2, characterized in that: A grouting hole is reserved in the prefabricated wall, and the grouting hole includes a first section and a second section. The first section passes through from the bottom surface of the prefabricated wall to the bottom wall of the embedded box, and the first section is coaxial with the through hole on the embedded box for the reinforcement to pass through, and the second section passes through from the top wall of the embedded box to the side wall of the prefabricated wall; the first section is also connected to a casting hole that passes through the side wall of the prefabricated wall.

4. The prefabricated wall connection structure according to claim 3, characterized in that: A water retaining weir is provided in the area of ​​the lower floor slab for connecting with the prefabricated wall, and a limiting groove having the same contour as the water retaining weir is provided on the bottom surface of the prefabricated wall, and the water retaining weir and the limiting groove are interlocked.

5. The prefabricated wall connection structure according to claim 4, characterized in that: The cross-sectional shape of the water retaining weir is a trapezoid.

6. The prefabricated wall connection structure according to claim 4, characterized in that: A positioning block is provided on the top of the water retaining weir, a positioning groove matched with the positioning block is provided in the limiting groove, the positioning block and the positioning groove are embedded with each other, and the cross-sectional shape of the positioning block is a trapezoid.

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