Waterproof device for building expansion joint

Abstract

The utility model relates to the technical field of constructional engineering, in particular to a waterproof device for a building expansion joint, which comprises two hard boards, a soft board, a screw component and a support inner frame, the two hard boards are connected through the soft board, the front side and the rear side of each hard board are connected with connecting blocks, the support inner frame is slidably connected to the connecting blocks, and a transmission rod is rotatably connected in the support inner frame. The screw assembly is composed of a screw and a nut, the nut end of the screw assembly is fixedly connected with the hard plate, a bevel gear set is arranged between the screw end and the transmission rod, the screw assembly is rotationally connected with the supporting inner frame, and a sealing assembly is arranged at the right-angle position of the hard plate and used for reducing a contact gap between the hard plate and a wall. Structural supporting force is provided through the hard plate, the overall shape stability is maintained, local deformation requirements are met through the soft plate, external impact is buffered, rigidity and softness are combined, and meanwhile the bearing requirements and deformation adaptability are met, so that the efficient waterproof function of the expansion joint is achieved, and the purpose of preventing water from permeating into a building is achieved.

Description

A waterproofing device for building expansion joints Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a waterproof device for building expansion joints. Background Technology

[0002] Building expansion joints are gaps designed to accommodate structural deformation caused by factors such as temperature changes, material shrinkage, or earthquakes. These gaps allow for a certain degree of displacement when the building is subjected to external forces, thus preventing structural cracking or damage. However, the existence of expansion joints also presents waterproofing challenges, especially in rainy or humid environments. Effectively preventing moisture from seeping into the building's interior through expansion joints has become an important issue in building design and construction.

[0003] Currently, a common method for waterproofing expansion joints is to directly reinforce the joint with stainless steel plates. This method involves fixing the stainless steel plates to both sides of the joint, utilizing their rigidity and corrosion resistance to prevent water penetration. Stainless steel plates possess a certain strength and durability, providing some waterproofing effect in most situations. However, this method has significant limitations in practical applications.

[0004] Although reinforcing with stainless steel sheets is a simple and easy method, its waterproofing effect is not ideal, especially when encountering heavy or prolonged rainfall. Because the joints between the stainless steel sheets and the building structure are difficult to seal completely, rainwater can easily seep in through tiny gaps, significantly reducing the waterproofing effect. Furthermore, stainless steel sheets may deform over long-term use due to temperature changes or structural displacement, further weakening their waterproofing performance. Summary of the Invention

[0005] To overcome the problem of leakage, this utility model provides a waterproof device for building expansion joints.

[0006] A waterproofing device for building expansion joints includes a rigid board, a flexible board, a screw assembly, and a supporting inner frame. Two rigid boards are connected by the flexible board. The rigid boards, positioned at right angles, fit against the right angles of the building. Connecting blocks are connected to both the front and rear sides of the rigid boards. The supporting inner frame is slidably connected to the connecting blocks. A transmission rod is rotatably connected inside the supporting inner frame. The screw assembly consists of a screw and a nut that are threaded together. The nut end of the screw assembly is fixedly connected to the rigid board. The screw end is close to the transmission rod, and a helical gear set is provided between the screw end and the transmission rod. The screw assembly is rotatably connected to the supporting inner frame. A sealing component is provided at the right angle of the rigid board to reduce the contact gap between the rigid board and the wall.

[0007] Furthermore, the sealing assembly includes a telescopic push plate. Several connecting shafts are connected to the side of the rigid plate, and the telescopic push plate is rotatably connected to each connecting shaft. The telescopic push plate consists of a sleeve and a rod that slide against each other. A wedge block and a sealing plate are slidably connected at the right angle of the rigid plate. The wedge block is in a pressing fit with the rigid plate and the sealing plate. An elastic element is provided on the top of the sealing plate. One end of the elastic element is connected to the rigid plate, and the other end is connected to the sealing plate. The top of the telescopic push plate is rotatably connected to the wedge block. Torsion springs are sleeved at both ends of the connecting shafts. One end of the torsion spring is connected to the rigid plate, and the other end is connected to the telescopic push plate.

[0008] Furthermore, the rigid plate has several fixing holes, and plugs are pressed into the fixing holes.

[0009] Furthermore, a stretchable filter screen is provided between the two rigid plates.

[0010] Furthermore, an extrusion sheet is connected to the side of the rigid plate.

[0011] Furthermore, a telescopic baffle is connected between the inner support frame and the rigid plate. The telescopic baffle is located above the screw assembly, and its two ends are fixedly connected to the inner support frame and the rigid plate, respectively.

[0012] Furthermore, the end of the transmission rod has an internal hexagonal groove.

[0013] Furthermore, the inner support frame has a circular hole at the contact end with the rigid plate. After the rigid plate is fixed to the building, the inner support frame is fixed through the circular hole.

[0014] Furthermore, the filter screen is made of nylon weaving, and both ends of the filter screen are connected to the rigid plate by elastic buckles, so that the filter screen stretches synchronously when the rigid plate moves.

[0015] Furthermore, the surface of the extruded sheet is covered with a fluororubber coating.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. The rigid board provides structural support and maintains the overall shape stability, while the flexible board adapts to local deformation needs and buffers external impacts. It combines rigidity and flexibility, meeting both load-bearing requirements and deformation adaptability. The rigid board can move smoothly to both sides and fit tightly against the building wall, thereby achieving the efficient waterproof function of the expansion joint and preventing water from seeping into the building.

[0018] 2. By using the various components of the sealing assembly, the telescopic push plate pushes the wedge block and sealing plate when the rigid plate moves, further sealing the gap between the rigid plate and the wall, thereby achieving a dynamic sealing function and ultimately enhancing the waterproof performance. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 is a three-dimensional structural diagram of the rigid plate and the flexible plate of the present invention.

[0021] Figure 3 is a three-dimensional structural diagram of the helical gear set, screw assembly and sealing plate of the present invention.

[0022] Figure 4 is an exploded view of part of the structure of this utility model.

[0023] Reference numerals: 1_Hard plate, 2_Soft plate, 3_Transmission rod, 4_Helical gear set, 5_Screw assembly, 6_Telescopic push plate, 7_Wedge block, 8_Coupling shaft, 9_Torsion spring, 10_Sealing plate, 11_Elastic element, 12_Support inner frame, 121_Connecting block, 13_Hole plug, 14_Filter screen, 15_Extrusion plate, 16_Telescopic baffle. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example: A waterproofing device for building expansion joints, as shown in Figures 1-4, includes a rigid plate 1, a flexible plate 2, a transmission rod 3, a helical gear set 4, a screw assembly 5, a supporting inner frame 12, a connecting block 121, and a sealing assembly. Two rigid plates 1 are connected by the flexible plate 2. The rigid plates 1, positioned at right angles, fit against the right angles of the building. Connecting blocks 121 are fixedly connected to both the front and rear sides of the rigid plate 1. The supporting inner frame 12 is slidably connected to the connecting blocks 121. The transmission rod 3 is rotatably connected inside the supporting inner frame 12. The end of the transmission rod 3 has an internal hexagonal groove. The screw assembly 5 consists of a screw and a nut connected by mutual threads. The nut end of the screw assembly 5 is fixedly connected to the rigid plate 1, and the screw end is close to the transmission rod 3. The screw end is connected to the transmission rod via the helical gear set 4. 3. Transmission connection: The screw assembly 5 is rotatably connected to the inner support frame 12. A sealing component is set at the right angle of the rigid plate 1. The sealing component is used to reduce the contact gap between the rigid plate 1 and the wall. The staff places the device at the building joint. The flexible plate 2 is inserted into the gap first and automatically adapts to the irregular shape of the joint. The rigid plate 1 with rigid structure fits into the building wall through the right angle design and provides the main support force. The rigid plate 1 maintains the overall structural stability. The flexible plate 2 compensates for the installation surface tolerance. The staff uses a hex wrench to rotate the transmission rod. The helical gear set 4 transmits the torque to the screw. The rotation of the screw pushes the nut to move linearly. The rigid plate 1 slides outward along the connecting block. The inner support frame 12 keeps the axis of the transmission rod 3 stable through the sliding connection to prevent off-center load.

[0026] As shown in Figures 2-4, the sealing assembly includes a telescopic push plate 6, a wedge block 7, a connecting shaft 8, a torsion spring 9, a sealing plate 10, and an elastic element 11. Several connecting shafts 8 are fixedly connected to the side of the rigid plate 1, and a telescopic push plate 6 is rotatably connected to each connecting shaft 8. The telescopic push plate 6 consists of a sleeve and a rod that slide together. The sleeve can slide along the rod to adjust the length of the telescopic push plate 6. A wedge block 7 and a sealing plate 10 are slidably connected at a right angle to the rigid plate 1. The wedge block 7 slides with the rigid plate 1 and presses against the sealing plate 10. An elastic element 11, a spring, is provided on the top of the sealing plate 10. One end of the elastic element 11 is welded to the rigid plate 1, and the other end is welded to the sealing plate 10. The top of plate 6 is rotatably connected to wedge block 7. Torsion springs 9 are sleeved at both ends of connecting shaft 8. One end of torsion spring 9 is welded to rigid plate 1, and the other end is welded to telescopic push plate 6. Torsion spring 9 ensures that telescopic push plate 6 automatically rebounds when rigid plate 1 is reset, driving wedge block 7 and sealing plate 10 back to their initial positions. When rigid plate 1 moves outward, the bottom of telescopic push plate 6 contacts the wall and rotates around connecting shaft 8. Torsion spring stores energy, and the top of telescopic push plate 6 pushes wedge block 7 to slide laterally, squeezing sealing plate 10 to move downward. Elastic element 11 is stretched, and the contact pressure between sealing plate 10 and building gap increases linearly with the displacement of rigid plate 1, ultimately forming a three-level seal: wedge block mechanical seal + elastic element pressure seal + soft plate flexible seal.

[0027] As shown in Figure 2, it also includes a hole plug 13. Several fixing holes are opened on the rigid plate 1, and the hole plug 13 is squeezed and fitted at the fixing holes. The hole plug 13 prevents the screws or nails from being corroded, and ensures that they can be loosened smoothly when disassembling, thereby improving the reusability and maintenance convenience of the device.

[0028] As shown in Figure 1, the device also includes a filter screen 14. A stretchable filter screen 14 is provided between the two rigid plates 1. The filter screen 14 is made of nylon weaving with a mesh size of 2mm×2mm. Both ends of the filter screen 14 are connected to the rigid plates 1 by elastic buckles. When the rigid plates 1 move, the filter screen 14 stretches synchronously. The filter screen 14 can be stretched to 150% of its original length to intercept particles ≥5mm. The nylon mesh ensures a water permeability of >90%, ensuring that the filter screen 14 prevents stones and other debris from falling into the gaps between the flexible plate 2 and the building, preventing damage or blockage to the flexible plate 2, while not affecting the telescopic function of the device.

[0029] As shown in Figure 2, the system also includes an extrusion plate 15. The extrusion plate 15 is fixedly connected to the side of the rigid plate 1. When the rigid plate 1 moves to both sides, the extrusion plate 15 comes into close contact with the building wall and generates an extrusion effect. This extrusion further optimizes the sealing between the rigid plate 1 and the building, preventing water from seeping in through the contact gap between the rigid plate 1 and the building, while protecting the rigid plate 1 from corrosion by water flow on the other side. The extrusion plate 15 is coated with a fluororubber coating, achieving dual protection of waterproofing and corrosion resistance.

[0030] As shown in Figure 2, it also includes a telescopic baffle 16. The telescopic baffle 16 is connected between the inner support frame 12 and the rigid plate 1. The telescopic baffle 16 is located above the screw assembly 5. The two ends of the telescopic baffle 16 are fixedly connected to the inner support frame 12 and the rigid plate 1, respectively. The function of the telescopic baffle 16 is to prevent dust, debris and other objects from falling on the screw assembly 5, avoid affecting the threaded fit between the screw and the nut, and ensure the smooth operation of the device.

[0031] The staff placed the entire device at the joint of the building and inserted the flexible plate 2 into the gap. The right angle of the rigid plate 1 contacted the right angle side of the building. Then, using a tool, they rotated the transmission rod 3. The transmission rod 3, through the helical gear set 4, drove the screw of the screw assembly 5 to rotate, thereby pushing the threaded nut to push the rigid plate 1 to both sides, making the rigid plate 1 closer to the building. At the same time, the rigid plate 1 slid with the supporting inner frame 12 through the connecting block 121, maintaining the stability of the transmission rod 3. The telescopic push plate 6 moved with the rigid plate 1, and its bottom contacted the building wall. After the lower end of the telescopic push plate 6 was squeezed, it rotated around the connecting shaft 8, thereby pushing the wedge block 7 to move outward. After the top of the wedge block 7 was squeezed by the rigid plate 1, it pushed the sealing plate 10 to move downward, and the elastic element 11 was stretched, thereby further sealing the gap between the rigid plate 1 and the building. The gap is then fixed by screws or nails through the fixing holes on the rigid plate 1. The hole plug 13 is inserted to prevent the screws or nails from being corroded. The extrusion plate 15 is located at the connection between the rigid plate 1 and the flexible plate 2. When the rigid plate 1 moves to both sides, the extrusion plate 15 comes into close contact with the building wall and generates an extrusion effect, which further optimizes the sealing between the rigid plate 1 and the building, prevents water from the other side from coming into contact with the rigid plate 1, and prevents the rigid plate 1 from being corroded. A stretchable filter screen 14 is set between the two rigid plates 1. The filter screen 14 is located above the flexible plate 2 and can block stones, debris, etc. from falling into the gap between the flexible plate 2 and the building. When the rigid plate 1 moves to both sides, the telescopic baffle 16 is stretched accordingly to cover the upper area of ​​the screw assembly 5 to prevent dust or debris from falling on the screw assembly 5 and avoid affecting the threaded fit between the screw and the nut.

[0032] During dismantling, remove the plug 13, then remove the screws or nails. The plug 13 ensures that the screws will not rust and can be loosened smoothly. Rotate the transmission rod 3 in the opposite direction, the rigid plate 1 moves towards the center, the torsion spring 9 rebounds, the elastic element 11 rebounds, the telescopic push plate 6 rotates, the wedge block 7 slides towards the center, and the sealing plate 10 slides upward to reset. Finally, remove the entire device. After the overall building is repaired, use other materials to fill the joints.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A waterproofing device for building expansion joints, characterized in that, The system includes a rigid plate (1), a flexible plate (2), a screw assembly (5), and a supporting inner frame (12). The two rigid plates (1) are connected by the flexible plate (2). The rigid plate (1) is set at a right angle and fits against the right angle of the building. Connecting blocks (121) are connected to both the front and rear sides of the rigid plate (1). The supporting inner frame (12) is slidably connected to the connecting blocks (121). A transmission rod (3) is rotatably connected inside the supporting inner frame (12). The screw assembly (5) consists of a screw and a nut that are threaded together. The nut end of the screw assembly (5) is fixedly connected to the rigid plate (1). The screw end is close to the transmission rod (3). A helical gear set (4) is provided between the screw end and the transmission rod (3). The screw assembly (5) is rotatably connected to the supporting inner frame (12). A sealing assembly is provided at the right angle of the rigid plate (1). The sealing assembly is used to reduce the contact gap between the rigid plate (1) and the wall.

2. A waterproofing device for building expansion joints according to claim 1, characterized in that, The sealing assembly includes a telescopic push plate (6). Several connecting shafts (8) are connected to the side of the rigid plate (1). The telescopic push plate (6) is rotatably connected to each connecting shaft (8). The telescopic push plate (6) is composed of a sleeve and a rod that slide against each other. A wedge block (7) and a sealing plate (10) are slidably connected at the right angle of the rigid plate (1). The wedge block (7) is pressed against the rigid plate (1) and the sealing plate (10). An elastic element (11) is provided on the top of the sealing plate (10). One end of the elastic element (11) is connected to the rigid plate (1) and the other end is connected to the sealing plate (10). The top of the telescopic push plate (6) is rotatably connected to the wedge block (7). Torsion springs (9) are sleeved on both ends of the connecting shaft (8). One end of the torsion spring (9) is connected to the rigid plate (1) and the other end is connected to the telescopic push plate (6).

3. A waterproofing device for building expansion joints according to claim 1, characterized in that, The rigid plate (1) has several fixing holes, and a hole plug (13) is squeezed and fitted at the fixing hole.

4. A waterproofing device for building expansion joints according to claim 1, characterized in that, A stretchable filter (14) is provided between the two rigid plates (1).

5. A waterproofing device for building expansion joints according to claim 1, characterized in that, The rigid plate (1) is connected to an extrusion sheet (15) on its side.

6. A waterproofing device for building expansion joints according to claim 1, characterized in that, A telescopic baffle (16) is connected between the inner support frame (12) and the rigid plate (1). The telescopic baffle (16) is located above the screw assembly (5). Both ends of the telescopic baffle (16) are fixedly connected to the inner support frame (12) and the rigid plate (1), respectively.

7. A waterproofing device for building expansion joints according to claim 1, characterized in that, The transmission rod (3) has an internal hexagonal groove at its end.

8. A waterproofing device for building expansion joints according to claim 1, characterized in that, The inner support frame (12) has a round hole at the contact end with the rigid plate (1). After the rigid plate (1) is fixed to the building, the inner support frame (12) is fixed through the round hole.

9. A waterproofing device for building expansion joints according to claim 4, characterized in that, The filter screen (14) is made of nylon weaving, and both ends of the filter screen (14) are connected to the hard plate (1) by elastic buckles. When the hard plate (1) moves, the filter screen (14) stretches synchronously.

10. A waterproofing device for building expansion joints according to claim 5, characterized in that, The surface of the extruded sheet (15) is covered with a fluororubber coating.

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