A wall expansion joint sealing device

Abstract

The utility model relates to a kind of wall expansion joint sealing devices. At present, the sealing device existing on market is used, due to the crack width of wall crack with the crack of outside condition change constantly expansion and contraction, it is difficult to realize effective sealing. A kind of wall expansion joint sealing device, the wall expansion joint sealing device includes main nut, main bolt, inner pressure plate, outer pressure plate and main pressure foot, main nut is screwed on main bolt, two main nuts are respectively screwed on each main bolt, two main pressure feet are installed between the two main nuts on the same main bolt, and main pressure foot is sleeved in main bolt, and the inner pressure plate and outer pressure plate are pressed tightly by two main pressure feet respectively;Asbestos board is laid between outer pressure plate and main pressure foot and wall, putty layer is between the asbestos board and the wall, and asbestos board and putty layer are tightly pressed on the wall surface needing sealing in crack. The utility model is applied to wall construction field.

Description

Technical Field

[0001] This utility model is applied in the field of wall construction, specifically relating to a sealing device for wall expansion joints. Background Technology

[0002] Currently, most oil depot tank farms have widespread wall cracks in their firewalls. Furthermore, these cracks constantly creep due to changes in external conditions (temperature, elevation, and terrain), causing the width of the cracks to slowly expand and contract. This persistent problem has plagued many hazardous chemical storage companies, including oil depots, in China for years, repeatedly recurring despite treatment efforts, and proving difficult to eradicate.

[0003] Expansion joints in walls can reduce their thermal insulation performance. For example, in cold regions, heat can be lost through these cracks, increasing indoor energy consumption. Furthermore, expansion joints can allow rainwater to seep into the wall, causing the internal materials to become damp, moldy, and even damaging the wall structure. If the expansion joint is large and the infill material is damaged, the damaged infill material must be removed and replaced with a new, more insulating and elastic infill material, such as rock wool, before sealing.

[0004] Currently, existing sealing devices have the following problems:

[0005] (1) Existing sealing devices or gap fillers such as cement are difficult to effectively seal as the width of wall cracks expands and contracts with changes in external conditions (such as temperature changes, slight rise and fall of the ground).

[0006] (2) Some existing sealing devices are not effective enough to completely seal large-area irregular spider web-like cracks in the wall.

[0007] (3) Some of the existing sealing devices on the market are difficult to effectively seal at right angles (top and bottom) of wall cracks.

[0008] (4) Existing wall crack sealants are difficult to achieve effective sealing between individual components.

[0009] (5) Some of the existing wall crack sealants or sealing filling materials are prone to aging, cracking, melting or flammability under high temperature conditions (when a fire occurs), resulting in sealing failure, making it difficult to effectively seal the protected object;

[0010] (6) Some of the existing wall crack sealants or sealing filling materials are prone to brittleness or aging under low temperature conditions, which can easily cause the sealing material itself to break or crack, making it difficult to effectively seal the protected object.

[0011] (7) Existing filler materials such as polyethylene, polyvinyl chloride, rubber, and polyurethane are not oil-resistant. They are prone to melting and deformation when exposed to oil or prolonged high temperatures, leading to seal failure. Some are not weather-resistant, some are not water-resistant, and so on. They all have their own defects.

[0012] (8) Existing wall crack sealants are difficult to improve the sealing performance and effect without entering the dangerous area. Summary of the Invention

[0013] The purpose of this invention is to provide a sealing device for wall expansion joints.

[0014] The above objectives are achieved through the following technical solutions:

[0015] A wall expansion joint sealing device, the wall expansion joint sealing device includes a main nut, a main bolt, an inner pressure plate, an outer pressure plate and a main pressure foot, the wall expansion joint sealing device is at least two sets, and the two sets of the wall expansion joint sealing device are arranged on the inner side and the outer side of the wall;

[0016] The main nut of each set of wall expansion joint sealing devices is screwed into the main bolt. Two main nuts are screwed into each main bolt. Two main pressure feet are installed between the two main nuts on the same main bolt. The main pressure feet are fitted into the main bolt. The two main pressure feet respectively press the inner pressure plate and the outer pressure plate tightly.

[0017] An asbestos board is laid between the outer pressure plate and the main pressure foot and the wall. A putty layer is placed between the asbestos board and the wall. The asbestos board and the putty layer are pressed tightly onto the wall surface where cracks need to be sealed.

[0018] The wall expansion joint sealing device has four main nuts. The main nuts are tightened or loosened on the main bolts to achieve the pressure of the main pressure foot acting on the pressure plate to achieve a tight seal on the wall cracks.

[0019] The wall expansion joint sealing device has two main bolts, which pass through a circular hole opened on the outside of the wall.

[0020] The wall expansion joint sealing device described herein uses steel rectangular plates for the inner and outer pressure plates, which press the asbestos board and putty layer firmly onto the wall surface where cracks need to be sealed.

[0021] The wall expansion joint sealing device described herein includes a main pressure foot comprising a cylinder and a pressure foot plate, wherein the outer cylinder surface of the cylinder and the pressure foot plate are integrally and fixedly connected.

[0022] Specifically, there are four presser foot plates, which are fixed to the insert in a circular array. The insert of the main presser foot is inserted into the main bolt.

[0023] The beneficial effects achieved by this utility model are:

[0024] This invention solves the problems existing in current wall sealing products, improving sealing effect, reducing cost, and enhancing performance. Even if the sealed wall experiences slight creep due to temperature, humidity, and terrain subsidence, and the width of cracks in the sealed wall decreases at high temperatures and increases at low temperatures, the sealing performance of this device remains unchanged, thus improving the sealing effect. It can be used in scenarios such as fire dikes, isolation walls, warehouses, and rooms in storage areas of liquid, gaseous, or other easily flowing and volatile hazardous chemicals, toxic, harmful, or flammable industries, where sealed storage and leakage management are required.

[0025] This invention improves the service life of sealing devices. For example, existing plastic seals, rubber seals, and cement-based gap fillers are prone to aging and embrittlement, leading to cracking and loss of elasticity, significantly reducing sealing effectiveness or even causing failure. This results in a relatively short lifespan for traditional wall seals, requiring frequent maintenance and upkeep. This invention effectively solves these problems, reducing the frequency of maintenance, upkeep, and replacement, lowering costs and energy consumption, and thus better aligning with the national low-carbon and environmentally friendly development philosophy. It inherently provides fire resistance, flame retardancy, and resistance to high and low temperatures and oil immersion. It improves the safety, practicality, durability, and chemical stability of sealing devices in this field. It meets relevant national standards and achieves the goal of permanent benefit from a single installation. It effectively reduces the cost of long-term, repetitive maintenance, upkeep, and replacement required by traditional seals, which only address the symptoms. It also effectively reduces the intensity and frequency of manual inspections and monitoring when wall cracks appear.

[0026] This invention allows for installation without the need for open flames in explosion-hazardous areas. By drilling a hole into the wall or firewall from the outside of the sealed wall (i.e., outside the explosion-hazardous area), spark-free, intrinsically safe cold-state installation can be achieved within the explosion-hazardous area (the internal outlet is temporarily sealed with a basin-shaped object), thus significantly reducing the construction risk. Furthermore, after connecting all components, tightening the screws achieves a compression seal, simplifying operation and improving production efficiency.

[0027] In the event of a leaking, dripping, seeping, or large-scale gas or liquid leakage, if gas or liquid is found leaking from the seal and rescue personnel cannot enter the hazardous area to tighten the seal, this invention allows rescue personnel to tighten external bolts from outside the wall (without entering toxic, harmful, or fire-prone areas) to increase the pressure of the internal seal and enhance its sealing effect. This significantly reduces the possibility of personnel entering the hazardous area and causing injury or death. It effectively prevents the accident from escalating and reduces the possibility of secondary or derivative accidents, thus better aligning with the safety-first and life-first principles of emergency rescue.

[0028] This utility model, due to its steel plate, bolt, and asbestos board structure, inherently provides fire resistance, flame retardancy, and resistance to high and low temperatures. It improves practicality and durability, achieving the goal of one-time installation and permanent benefit. It effectively reduces the cost of long-term, repeated maintenance, and replacement of traditional seals, and significantly reduces the intensity and frequency of manual inspections and monitoring.

[0029] This utility model involves screwing the main nut onto the main bolt. Two main nuts are screwed into each end of each main bolt. Two main pressure feet are installed between the two main nuts on the same main bolt, and these pressure feet are fitted into the main bolt. The two main pressure feet press firmly against the inner and outer pressure plates of the cracked wall. An asbestos board is laid between the inner and outer pressure plates and the wall. A paste-like exterior wall putty layer, approximately 1 cm thick, is applied between the asbestos board and the wall. First, all cracks on the wall surface that need sealing are sealed using the paste-like putty layer, and the surface is initially smoothed. Then, asbestos boards cut to the appropriate sealing area are adhered. Next, steel pressure plates inside and outside the wall are used to tightly press the asbestos board and putty layer firmly onto the cracked wall surface. By tightening the nuts, the main pressure feet apply pressure evenly to the inner and outer pressure plates, asbestos board, and exterior wall putty, ensuring they are tightly adhered and pressed onto the cracked wall surface. Under this strong pressure, the paste-like exterior wall putty is further squeezed into all cracks of all sizes in the wall, sealing and filling them, achieving a tight seal. After the paste-like exterior wall putty dries, this sealing device will bond tightly to the wall to be sealed, forming an unbreakable whole. It is resistant to weathering and erosion, water, and high temperatures, and will not melt (in case of oil leakage or fire inside the fire dike). Furthermore, this product has extremely high chemical stability and is resistant to oil immersion (even if an oil tank overflows or leaks, this device will remain well-sealed after prolonged immersion in oil inside the fire dike), preventing oil from leaking outside the fire dike and avoiding secondary accidents, increased economic losses, and reduced rescue difficulty (rescue personnel can tighten the nut outside the fire dike to strengthen the seal inside the fire dike. This operation allows rescue personnel to work without entering the fire dike's accident pool, avoiding situations like the Tianjin Port rescue where rescue personnel had to enter the fire scene for emergency rescue, resulting in numerous casualties and escalating the accident). Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0031] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0032] Appendix Figure 2 It is attached Figure 1 Structural diagram without walls shown;

[0033] Appendix Figure 3 This is the left view of Figure 2;

[0034] Appendix Figure 4 This is a top view of the main presser foot;

[0035] Appendix Figure 5 It is attached Figure 4 AA section view;

[0036] Appendix Figure 6 This is a schematic diagram showing the connection of the main nut, main bolt, and main pressure foot.

[0037] Appendix Figure 7 This is a structural diagram showing the process of drilling through a wall gap before installation.

[0038] Appendix Figure 8 This is a structural diagram showing the process of filling the gaps between the inner and outer walls and bolt holes with putty on the exterior wall;

[0039] Appendix Figure 9 This is a structural diagram showing the process of attaching asbestos boards to exterior wall putty.

[0040] Appendix Figure 10 This is a structural diagram showing the insertion of main bolts through holes in the wall and the installation of steel pressure plates and main pressure feet on the inner and outer asbestos panels of the wall.

[0041] In the diagram: 1. Main nut, 2. Main bolt, 3. Inner pressure plate, 4. Outer pressure plate, 5. Main pressure foot, 6. Wall, 7. Asbestos board, 8. Putty layer, 9. Drill hole in the wall, 51. Insert, 52. Pressure foot and pressure plate. Detailed Implementation

[0042] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0043] Example 1

[0044] A wall expansion joint sealing device, comprising a main nut 1, a main bolt 2, an inner pressure plate 3, an outer pressure plate 4, and a main pressure foot 5, wherein there are at least two sets of the wall expansion joint sealing device, and the two sets of the wall expansion joint sealing device are arranged on the inner and outer sides of the wall.

[0045] The main nut of each set of wall expansion joint sealing devices is screwed into the main bolt. Two main nuts are screwed into each main bolt. Two main pressure feet are installed between the two main nuts on the same main bolt. The main pressure feet are fitted into the main bolt. The two main pressure feet respectively press the inner pressure plate and the outer pressure plate tightly.

[0046] An asbestos board 7 is laid between the outer pressure plate and the main pressure foot and the wall 6. A putty layer 8 is between the asbestos board and the wall. The asbestos board and the putty layer are tightly pressed onto the wall surface where cracks need to be sealed.

[0047] Four main nuts are included. The tightness and sealing of the steel pressure plate against the wall cracks are adjusted by appropriately tightening or loosening the main nuts on the main bolts. Two main bolts (installed through the wall cracks), one type of steel bolt, are used to install the main nuts and adjust the sealing pressure.

[0048] The main pressure foot can evenly transmit the pressure from the main nut to the pressure plate, making the pressure plate more evenly stressed and improving the sealing effect.

[0049] The function of the inner and outer pressure plates is to, when subjected to the tightening pressure from the nuts, utilize their own flatness to firmly press the asbestos board and putty layer onto the wall surface where cracks need to be sealed. At this time, the pressure tightly binds the inner and outer pressure plates, asbestos board, wall putty, and the sealed wall into a seamless whole.

[0050] Asbestos boards utilize a fire-retardant, water- and oil-resistant sealing gasket. It is used between the pressure plate and the wall. It can be cut to a suitable shape as needed for use between the pressure plate and the wall. Features include fire resistance, high and low temperature resistance, oil resistance, and water resistance after compression.

[0051] The putty layer is wall putty. After the putty powder is mixed with water according to a specific ratio, it is evenly applied to the cracked wall surface to repair and fill the cracks. The wall surface is then leveled to facilitate the overall sealing of the cracks by the asbestos board and pressure plate. After installation, pressing, and drying, it tightly bonds the asbestos board and the wall surface requiring sealing together. It is used between the asbestos board and the wall.

[0052] When large, irregular spiderweb-like cracks appear on the wall, the pressure plate needs to be cut to a size that can cover the entire area of ​​the spiderweb-like cracks. Using two or more sealants together will completely seal the cracks.

[0053] The main nut, main bolt, main pressure foot, outer pressure plate, inner pressure plate, asbestos board, and putty layer form a complete and independent sealing device for sealing single cracks, expansion joints, or small-area cracks on the same plane. Two sealing devices can be used together to seal right-angle corners on walls on different planes.

[0054] (1) First, drill a round hole through the wall from the outside to the inside at the crack in the wall, large enough for the main bolt to pass through. Then insert the main bolt into the hole. Next, fill the crack in the area of ​​the wall that needs to be sealed with wall putty and smooth it. Then, put the cut asbestos board onto the main bolt, insert the main clamping foot into both ends of the main bolt, and finally insert the main nut into both ends of the main bolt and tighten the main nut to achieve a tight seal;

[0055] (2) When a large area of ​​concentrated cracks or a large area of ​​small fissures in the wall needs to be sealed, one or more independent sealing devices can be installed at each end of the fissure boundary. Then fill and smooth the fissure surface with wall putty, and attach asbestos board and pressure plate. Then tighten the main nut and apply vertical pressure to the outer or inner pressure plate to press it against the wall surface to achieve the purpose of sealing;

[0056] (3) When a crack appears at a right angle of the wall and needs to be sealed, two sealing devices can be installed at appropriate positions on both sides of the wall. Then, fill the crack with wall putty and smooth it. Then, bend the cut asbestos board at a right angle (be careful not to break it) and put it on the two main bolts. Then, insert the main pressure feet at both ends of the main bolts. Finally, insert the main nuts at both ends of the main bolts and tighten the main nuts to achieve the sealing of the crack at the corner of the wall.

[0057] Example 2

[0058] According to the wall expansion joint sealing device described in Embodiment 1, there are four main nuts. The main nuts are tightened or loosened on the main bolts to press the main pressure foot onto the pressure plate, thereby adjusting the pressure and sealing degree of the pressure plate on the wall crack.

[0059] The main nut is made of steel and has a very strong pressure function after being tightened on the screw. It is fireproof, resistant to high and low temperatures, and water resistant.

[0060] Example 3

[0061] According to the wall expansion joint sealing device described in Embodiment 1 or 2, the number of main bolts is two, and the main bolts pass through the circular holes opened on the outside of the wall.

[0062] The main bolt passes through the corresponding main pressure feet on both sides of the wall, and tightening the main nut achieves the function of pressing the pressure plate (the pressure plate on the crack side).

[0063] Example 4

[0064] According to the wall expansion joint sealing device described in Embodiment 1, 2 or 3, the inner pressure plate and the outer pressure plate are made of steel rectangular plates, and the inner pressure plate and the outer pressure plate press the asbestos board and putty layer firmly onto the wall surface where cracks need to be sealed.

[0065] The inner and outer pressure plates are made of steel. Under the pressure transmitted from the main pressure foot, they tightly compress the asbestos board, wall putty, and wall, combining them into a sealed, airtight unit. Features include fire resistance, high and low temperature resistance, and water resistance.

[0066] Example 5

[0067] According to the wall expansion joint sealing device described in Embodiment 1, 2, 3 or 4, the main pressure foot includes a cylinder 51 and a pressure foot plate 52. The outer cylinder surface of the cylinder and the pressure foot plate are integrally fixedly connected. Specifically, there are four pressure foot plates, and the four pressure foot plates are fixed on the cylinder in a circular array. The cylinder of the main pressure foot is inserted into the main bolt.

[0068] Before installation, drill a hole through the wall in the middle of the gap to prepare for inserting the main bolt. The advantage of installing the main bolt in the middle of the gap is that the sealing device is unaffected by the creep of the walls on both sides of the gap. The walls on both sides of the gap will continuously move laterally due to seasonal changes, widening or narrowing the gap. The sealing device will remain stationary, and the asbestos board, under the pressure of the pressure plate, will still maintain a constant radial vertical sealing pressure on the wall surface, thus reliably sealing the changed gap with strong sealing stability. Then, fill the gaps between the inner and outer walls and the bolt hole with exterior wall putty. Adhere the asbestos board to the exterior wall putty. Finally, insert the main bolt through the hole in the wall, and install steel pressure plates and main pressure feet on the inner and outer asbestos boards in the wall, tightening them with bolts to ensure compaction.

[0069] After installation, the paste-like exterior wall putty, under the strong pressure of the steel pressure plate, is evenly distributed across the cracked wall surface, completely sealing the top and bottom. Some of the putty can be seen being squeezed out at the edges of the pressure plate. This indicates that the various sizes and shapes of wall cracks under the pressure plate have been fully penetrated by the paste-like putty, achieving a saturated and tightly sealed state. The installation is now complete. Once the exterior wall putty is completely dry, this sealing device will firmly bond with the wall to be sealed, forming an airtight unit with extremely high sealing performance. Furthermore, this product has excellent fire resistance, rain resistance, oil resistance, and corrosion resistance, exhibiting excellent physical and chemical stability, making it durable. It is ideal for sealing applications such as fire dikes in storage areas for liquid and gaseous hazardous chemicals, walls in warehouses for toxic and harmful hazardous chemicals, and isolation walls.

Claims

1. A wall expansion joint sealing device, characterized in that, The wall expansion joint sealing device includes a main nut, a main bolt, an inner pressure plate, an outer pressure plate, and a main pressure foot. The wall expansion joint sealing device consists of at least two sets, and the two sets of the wall expansion joint sealing device are located on the inner and outer sides of the wall. The main nut of each set of wall expansion joint sealing devices is screwed into the main bolt. Two main nuts are screwed into each main bolt. Two main pressure feet are installed between the two main nuts on the same main bolt. The main pressure feet are fitted into the main bolt. The two main pressure feet respectively press the inner pressure plate and the outer pressure plate tightly. An asbestos board is laid between the outer pressure plate and the main pressure foot and the wall. A putty layer is placed between the asbestos board and the wall. The asbestos board and the putty layer are pressed tightly onto the wall surface where cracks need to be sealed.

2. The wall expansion joint sealing device according to claim 1, characterized in that, The number of main nuts is four. The main nuts are tightened or loosened on the main bolts to adjust the sealing degree of the main pressure foot pressing on the pressure plate to the wall cracks.

3. The wall expansion joint sealing device according to claim 1, characterized in that, The number of main bolts is two, and the main bolts pass through the circular holes opened on the outside of the wall.

4. The wall expansion joint sealing device according to claim 1, characterized in that, The inner and outer pressure plates are made of steel rectangular plates, which press the asbestos board and putty layer firmly onto the wall surface where cracks need to be sealed.

5. The wall expansion joint sealing device according to claim 1, characterized in that, The main presser foot includes a cylinder and a presser foot plate, and the outer cylinder surface of the cylinder and the presser foot plate are integrally and fixedly connected. Specifically, there are four presser foot plates, which are fixed to the insert in a circular array. The insert of the main presser foot is inserted into the main bolt.

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