A construction engineering concrete prefabricated component crack prevention and repair device
By designing a crack prevention and repair device for precast concrete components with a liquid storage chamber and a drive motor, the problems of high labor intensity and low efficiency in the existing technology have been solved, and the device enables rapid and efficient crack repair and adjustable thickness of adhesive application.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CSCEC STRAIT CONSTR & DEV
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-07
AI Technical Summary
In existing technologies, the repair process for cracks in precast concrete components is labor-intensive and inefficient, making it impossible to achieve rapid repair on a large scale.
A device for preventing and repairing cracks in precast concrete components for building construction was designed. The device utilizes adhesive in the storage chamber to adhere to the surface of the brush roller. The brush roller is driven by a drive motor to move at the crack. Combined with the operation of the gun-shaped handle, the device can quickly apply and inject adhesive to repair the crack. It is equipped with a scraper to prevent debris from entering the storage chamber.
It enables rapid, efficient, and labor-saving repair of cracks, and allows for adjustment of adhesive thickness as needed, thereby improving repair efficiency and labor utilization.
Smart Images

Figure CN224468845U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building engineering technology, and in particular to a device for preventing and repairing cracks in precast concrete components for building engineering. Background Technology
[0002] Cracks in precast concrete components are physical structural changes caused by internal and external factors. Cracks are a major cause of reduced load-bearing capacity, durability, and waterproofing of concrete structures. If the cracks are not particularly severe and only cause leakage, a caulking method can be used. A V-shaped groove is chiseled along the crack, debris is removed, and the area is rinsed clean with water. Next, a layer of waterproofing solution is applied to the surface of the crack for repair.
[0003] In the process of repairing cracks in precast concrete components, the adhesive is applied manually to the cracks using a brush. This method is not only labor-intensive but also inefficient, making it unsuitable for the rapid repair of large numbers of cracks. To address these issues, this application proposes a device for preventing and repairing cracks in precast concrete components for building construction. Utility Model Content
[0004] To address the technical problems existing in the background art, this utility model proposes a device for preventing and repairing cracks in precast concrete components for building engineering. The adhesive in the storage chamber adheres to the surface of the coating roller, and the drive motor can drive the coating roller. The coating roller is moved at the crack by controlling the coating roller through the gun-shaped handle. During the rotation of the coating roller, the adhesive is continuously carried out and applied to the crack, which can realize rapid glue injection repair of cracks. Moreover, the crack repair is more efficient and labor-saving, thus solving the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, this utility model provides a device for preventing and repairing cracks in precast concrete components for building engineering, including a gun-shaped handle, an installation cover connected to the end of the gun-shaped handle, a brush roller rotatably mounted inside the installation cover, a drive motor mounted on the end surface of the installation cover, and the power output end of the drive motor being connected to the brush roller in a transmission.
[0006] An adjusting coating scraper is movably installed at the top of the inner cavity of the mounting cover, and a cleaning scraper is installed at the bottom of the inner cavity of the mounting cover. Both the cleaning scraper and the adjusting coating scraper abut against the surface of the coating roller.
[0007] A liquid storage tank is installed on the upper surface of the gun-shaped handle, and the bottom of the liquid storage tank is connected to the mounting cover via a conduit.
[0008] Preferably, the inner cavity of the coating roller forms a liquid storage cavity, which is located between the impurity removal scraper and the liquid adjustment scraper.
[0009] Preferably, an adjusting screw is threaded through the middle of the upper surface of the mounting cover, the bottom of the adjusting screw is rotatably connected to the upper surface of the adjusting coating scraper, and a locking nut is threaded onto the surface of the adjusting screw.
[0010] Preferably, a guide rod is installed on the upper surface of the adjusting coating scraper, and the guide rod is arranged symmetrically.
[0011] Preferably, a guide hole is provided through the upper surface of the mounting cover at a position corresponding to the guide rod, and the guide rod is inserted into the guide hole.
[0012] Preferably, the inner wall of the guide hole and the lower surface of the locking nut are both provided with sealing sleeves.
[0013] Preferably, the upper surface of the liquid storage tank is provided with a liquid injection port and a vent valve, and the liquid storage tank is located on one side of the vent valve.
[0014] The advantages of this utility model compared to the prior art are as follows:
[0015] In this invention, the adhesive in the liquid chamber adheres to the surface of the coating roller. The drive motor can drive the coating roller, and the coating roller can be moved at the crack by controlling the gun-shaped handle. During the rotation of the coating roller, the adhesive is continuously carried out and applied to the crack, which can realize the rapid glue filling and repair of the crack, and the crack repair is more efficient and labor-saving.
[0016] This invention utilizes a rotating adjusting screw, which, under the action of the surface thread, pushes the adjusting coating scraper to move. The guide rod, in conjunction with the guide hole, guides the movement of the adjusting coating scraper. By finely adjusting the distance between the adjusting coating scraper and the coating roller, the amount of adhesive adhering to the surface of the coating roller can be adjusted, thereby enabling rapid adjustment of the adhesive thickness during crack repair. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of a crack prevention and repair device for precast concrete components in building engineering according to the present invention.
[0018] Figure 2 This is a schematic diagram of the rear bridge fixing structure of a crack prevention and repair device for precast concrete components in building engineering according to this utility model.
[0019] Figure 3 This is a schematic diagram of the airbag protective structure of a crack prevention and repair device for precast concrete components in building engineering, according to the present invention.
[0020] Figure 4 This is a schematic diagram of the circular mounting ring structure of a crack prevention and repair device for precast concrete components in building engineering, according to this utility model.
[0021] Figure label:
[0022] 1. Gun-shaped handle; 2. Mounting cover; 3. Coating roller; 4. Drive motor; 5. Liquid storage chamber; 6. Adjusting coating scraper; 7. Impurity removal scraper; 8. Adjusting screw; 9. Locking nut; 10. Guide rod; 11. Sealing sleeve; 12. Guide hole; 13. Liquid storage tank; 14. Injection port; 15. Vent valve. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.
[0024] like Figure 1-4 As shown, the present invention proposes a device for preventing and repairing cracks in precast concrete components for building engineering, including a gun-shaped handle 1, an installation cover 2 connected to the end of the gun-shaped handle 1, a brush roller 3 rotatably mounted inside the installation cover 2, a drive motor 4 mounted on the end surface of the installation cover 2, and the power output end of the drive motor 4 being connected to the brush roller 3 in a transmission.
[0025] An adjusting coating scraper 6 is movably installed at the top of the inner cavity of the mounting cover 2, and a cleaning scraper 7 is installed at the bottom of the inner cavity of the mounting cover 2. Both the cleaning scraper 7 and the adjusting coating scraper 6 abut against the surface of the coating roller 3.
[0026] A liquid storage tank 13 is installed on the upper surface of the gun-shaped handle 1. The bottom of the liquid storage tank 13 is connected to the mounting cover 2 through a conduit. The inner cavity of the coating roller 3 forms a liquid storage chamber 5, which is located between the impurity removal scraper 7 and the adjusting coating scraper 6.
[0027] It should be noted that the adhesive in the storage tank 13 flows into the storage chamber 5 under the action of gravity. The storage chamber 5 is located inside the mounting cover 2, and the adhesive is blocked at both ends of the storage chamber 5 by adjusting the coating scraper 6 and the impurity removal scraper 7 respectively. The adhesive in the storage chamber 5 adheres to the surface of the coating roller 3. The drive motor 4 can drive the coating roller 3. The coating roller 3 is moved at the crack by controlling the gun-shaped handle 1. The coating roller 3 continuously carries out the adhesive during the rotation and applies the adhesive to the crack, which can realize the rapid glue filling repair of the crack, and the crack repair is more efficient and labor-saving.
[0028] In this embodiment, as Figure 3 and Figure 4As shown, an adjusting screw 8 is threaded through the middle of the upper surface of the mounting cover 2. The bottom of the adjusting screw 8 is rotatably connected to the upper surface of the adjusting coating scraper 6. A locking nut 9 is threadedly connected to the surface of the adjusting screw 8.
[0029] It should be noted that by rotating the adjusting screw 8, the adjusting screw 8 pushes the adjusting coating scraper 6 to move under the action of the surface thread, which can make fine adjustments to the adjusting coating scraper 6. At the same time, the locking nut 9 can lock the adjusting screw 8.
[0030] In this embodiment, as Figure 3 and Figure 4 As shown, a guide rod 10 is installed on the upper surface of the adjusting coating scraper 6. The guide rod 10 is symmetrically arranged. A guide hole 12 is provided through the upper surface of the mounting cover 2 at the position corresponding to the guide rod 10. The guide rod 10 is inserted into the guide hole 12.
[0031] It should be noted that the guide rod 10, in conjunction with the guide hole 12, can guide the adjustment of the coating scraper 6.
[0032] In this embodiment, as Figure 3 and Figure 4 As shown, both the inner wall of the guide hole 12 and the lower surface of the locking nut 9 are provided with sealing sleeves 11.
[0033] It should be noted that the sealing sleeve 11 abuts against the surface of the guide rod 10, and the locking nut 9 presses down on the sealing sleeve 11, which can seal the connection between the guide hole 12 and the guide rod 10 and the connection between the adjusting screw 8 and the mounting cover 2.
[0034] In this embodiment, as Figure 1 As shown, the upper surface of the liquid storage tank 13 is provided with a liquid injection port 14 and a vent valve 15, and the liquid storage tank 13 is located on one side of the vent valve 15.
[0035] It should be noted that the adhesive can be conveniently added to the storage tank 13 through the injection port 14. After the adhesive flows out of the storage tank 13, outside air can enter the storage tank 13 through the vent valve 15 to ensure the pressure balance inside the storage tank 13.
[0036] The working principle and usage process of this utility model are as follows: The adhesive in the storage tank 13 flows into the storage chamber 5 under gravity. The storage chamber 5 is located inside the mounting cover 2, and the adhesive is blocked at both ends by adjusting the coating scraper 6 and the impurity removal scraper 7, respectively. The adhesive in the storage chamber 5 adheres to the surface of the coating roller 3. The drive motor 4 drives the coating roller 3, and the coating roller 3 is moved at the crack by the gun-shaped handle 1. During rotation, the coating roller 3 continuously carries out the adhesive and applies it to the crack, enabling rapid adhesive filling and repair of the crack. The crack repair process is more efficient and labor-saving. The impurity scraper 7 can scrape off the sand and gravel adhering to the surface of the coating roller 3, preventing the sand and gravel from entering the liquid storage chamber 5. By rotating the adjusting screw 8, the adjusting screw 8 pushes the adjusting coating scraper 6 to move under the action of the surface thread. The guide rod 10 and the guide hole 12 are matched to guide the movement of the adjusting coating scraper 6. By finely adjusting the distance between the adjusting coating scraper 6 and the coating roller 3, the amount of adhesive adhering to the surface of the coating roller 3 can be adjusted, so as to quickly adjust the coating thickness when repairing cracks.
[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.
Claims
1. A device for preventing and repairing cracks in precast concrete components for building construction, characterized in that: It includes a gun-shaped handle, with a mounting cover connected to the end of the gun-shaped handle. A brush roller is rotatably mounted inside the mounting cover, and a drive motor is mounted on the end surface of the mounting cover. The power output end of the drive motor is connected to the brush roller in a transmission. An adjusting coating scraper is movably installed at the top of the inner cavity of the mounting cover, and a cleaning scraper is installed at the bottom of the inner cavity of the mounting cover. Both the cleaning scraper and the adjusting coating scraper abut against the surface of the coating roller. A liquid storage tank is installed on the upper surface of the gun-shaped handle, and the bottom of the liquid storage tank is connected to the mounting cover via a conduit.
2. The device for preventing and repairing cracks in precast concrete components for building construction according to claim 1, characterized in that: The inner cavity of the coating roller forms a liquid storage chamber, which is located between the impurity removal scraper and the liquid adjustment scraper.
3. The device for preventing and repairing cracks in precast concrete components for building construction according to claim 1, characterized in that: An adjusting screw is threaded through the middle of the upper surface of the mounting cover. The bottom of the adjusting screw is rotatably connected to the upper surface of the adjusting coating scraper. A locking nut is threaded onto the surface of the adjusting screw.
4. The device for preventing and repairing cracks in precast concrete components for building construction according to claim 1, characterized in that: The upper surface of the adjusting coating scraper is equipped with guide rods, which are arranged symmetrically.
5. A crack prevention and repair device for precast concrete components in building engineering according to claim 4, characterized in that: A guide hole is provided on the upper surface of the mounting cover at a position corresponding to the guide rod, and the guide rod is inserted into the guide hole.
6. A device for preventing and repairing cracks in precast concrete components for building construction according to claim 5, characterized in that: Both the inner wall of the guide hole and the lower surface of the locking nut are provided with sealing sleeves.
7. A device for preventing and repairing cracks in precast concrete components for building construction according to claim 1, characterized in that: The upper surface of the liquid storage tank is provided with a liquid injection port and a vent valve, and the liquid storage tank is located on one side of the vent valve.