Historic building masonry wall reinforcing device and reinforcing method

Abstract

The present application relates to the field of building technology, and discloses a historical building masonry wall reinforcing device and reinforcing method, comprising a building masonry. The present application is provided with a scraper with a notch on the grouting pipe. When the scraper slides towards the inside of the grouting hole, it can directly scrape off the residual dust on the side wall of the grouting hole. The residual mortar generated during the cleaning process can be discharged through the notch at the bottom of the scraper. This effectively avoids the interference of impurities in the hole with the combination of grouting liquid and building masonry, solving the problem of reinforcement failure caused by incomplete cleaning of impurities in traditional reinforcement. During the grouting process, as the grouting hole is filled with grouting liquid, the pressure generated by the grouting liquid will push the scraper to move. During this process, the scraper can again scrape the side wall of the grouting hole, further pushing out the residual residual mortar, ensuring the cleanliness of the hole, avoiding the influence of trace residual mortar after the first cleaning on the solidification effect of the grouting liquid, and making the grouting liquid more evenly fill the grouting hole, forming a more stable whole with the building masonry, significantly improving the reinforcement reliability and prolonging the service life of the building.

Description

Technical Field

[0001] This invention belongs to the field of building technology, specifically, it relates to a device and method for reinforcing masonry walls of historical buildings. Background Technology

[0002] Historical buildings, as important carriers of cultural heritage and historical memory, are mostly constructed using bricks, stones, and traditional mortar. Due to long-term erosion from the natural environment, the weight of the structure itself, and external disturbances, these masonry structures are prone to cracks, weathering, and efflorescence, which not only damage the building's appearance but also directly threaten its structural load-bearing safety. Therefore, targeted reinforcement and repair work is urgently needed.

[0003] In the reinforcement of masonry structures in historical buildings, grouting reinforcement has become a widely used method due to its advantages such as minimal disturbance to the building structure, effective filling of internal gaps, and restoration of structural integrity. The core process of this method typically involves creating grouting holes at the masonry cracks, cleaning impurities from the holes, and injecting reinforcing grout. The grout then solidifies within the holes and cracks, forming a stable load-bearing system, thereby increasing the strength of the masonry structure.

[0004] However, in practical applications, traditional grouting reinforcement technology has revealed that grouting holes contain a large amount of residual mortar during grouting. Traditional cleaning methods often rely on compressed air blowing, but brushes cannot reach deep into the hole walls and tiny crevices. Furthermore, compressed air can easily blow some dust into the bottom of the hole or into cracks. These residual impurities directly hinder the bonding between the grout and the masonry, preventing the grout from fully wetting the masonry substrate. After curing, this can easily lead to hollow areas and delamination at the interface, ultimately causing failure in the stress transfer of the reinforced area and creating structural safety hazards.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0007] A device for reinforcing masonry walls of historical buildings, comprising building masonry.

[0008] The building masonry has grouting holes inside, the grouting holes are inclined, the inlet of the grouting hole is provided with a cover plate, the inside of the cover plate is installed with a grouting pipe, and the outlet of the grouting pipe is located at the bottom of the grouting hole;

[0009] A scraper is inserted into the grouting pipe. When the scraper has a notch at the bottom, it cleans the dust remaining on the side wall of the grouting hole as it slides into the grouting hole and discharges it through the notch. A baffle is rotatably installed on the side wall of the notch. After cleaning, the grouting pipe is rotated to drive the baffle connected synchronously to rotate and seal the notch.

[0010] A connecting cover is installed at the connection port of the grouting pipe. A sealing plate for the grouting pipe is inserted into the connecting cover. A top rod is installed on the sealing plate. The end of the top rod is slidably connected to a guide block installed on the cover plate. An inclined surface is installed on the guide block. When the grouting pipe rotates, the top rod slides along the inclined surface, and the sealing plate gradually loses its seal on the grouting pipe.

[0011] During the grouting process, the grouting hole is filled with grout, which pushes the scraper to move and push out the remaining mortar.

[0012] In a preferred embodiment of the present invention, a limiting rod is installed inside the cover plate, and a base plate is installed at the end of the limiting rod. The base plate and the cover plate have the same diameter, and the base plate is attached to the bottom of the grouting hole. The limiting rod and the cover plate are movably connected. The grouting hole is opened at the crack of the building masonry. A limiting seat is installed on the limiting rod, and the limiting seat is rotatably connected to the grouting pipe. A discharge port is opened at the bottom of the cover plate for discharging residual mortar.

[0013] In a preferred embodiment of the present invention, a slide rail is installed on the scraper, a baffle is slidably arranged on the slide rail, the slide rail is in an arc state, an insert rod is installed on the baffle, a turntable is movably inserted into the side wall of the insert rod, the turntable is rotatably connected to the cover plate, the center position of the turntable is connected to the grouting pipe, and an insert plate is installed at the end of the insert rod, the diameter of the insert plate being larger than the diameter of the insert rod.

[0014] In a preferred embodiment of the present invention, mounting holes are provided at the four corners of the connecting cover, which facilitates connection with the slurry conveying unit. A ball bearing is installed on the top of the top rod, and the top of the ball bearing is in rolling connection with the side wall of the guide block.

[0015] In a preferred embodiment of the present invention, a cover plate is installed on the side wall of the top rod, and a positioning frame is movably inserted into the side wall of the top rod. The positioning frame is U-shaped, and a compression spring is sleeved on the top rod. One end of the compression spring is engaged with the bottom of the cover plate, and the other end of the compression spring is engaged with the positioning frame.

[0016] In a preferred embodiment of the present invention, a rocker arm is installed on the side wall of the grouting pipe, a positioning sleeve is installed through the rocker arm, a locking rod is movably inserted inside the positioning sleeve, a pair of locking holes are opened on the cover plate, and the locking holes are equidistant from the center point of the cover plate, and the locking rod is inserted into the locking holes for positioning the angle of the grouting pipe.

[0017] In a preferred embodiment of the present invention, a sliding plate is movably inserted inside the positioning sleeve. One end of the sliding plate is connected to a locking rod, and a connecting rod is installed at the other end of the sliding plate. The connecting rod movably passes through the positioning sleeve, and a pressure plate is installed at the end of the connecting rod. A return spring is sleeved on the connecting rod located on the inner side wall of the positioning sleeve. One end of the return spring is locked onto the sliding plate, and the other end of the return spring is locked onto the inner side wall of the positioning sleeve.

[0018] A method for reinforcing masonry walls in historical buildings, comprising the following steps:

[0019] Step 1: Open inclined grouting holes at the cracks in the masonry. Place the base plate against the bottom of the grouting hole. Fix the position of the base plate and the cover plate by the limiting rod that moves through the cover plate. Then, rotate the grouting pipe to the limiting rod through the limiting seat so that the outlet of the grouting pipe extends to the bottom of the grouting hole.

[0020] Step 2: Push the scraper inserted into the grouting pipe and slide it into the grouting hole. Use the side wall of the scraper to scrape away the dust in the hole. The remaining mortar is discharged through the notch at the bottom of the scraper and the material outlet of the cover plate. At this time, the baffle at the notch is kept open.

[0021] Step 3: Pull the pressure plate at the end of the positioning sleeve on the rocker arm, and drive the sliding plate to compress the reset spring through the connecting rod, so that the locking rod can be pulled out from the locking hole of the cover plate to unlock; rotate the grouting pipe, and simultaneously drive the turntable to rotate the baffle along the slide rail to seal the notch, and the rocker arm drives the top rod to slide along the inclined surface of the guide block, so that the sealing plate releases the seal on the grouting pipe;

[0022] Step 4: Connect the grout delivery unit through the mounting hole of the connecting cover, and inject the grout into the grouting hole through the grouting pipe. After the grout fills the hole, push the scraper to move up and scrape off the residual mortar on the hole wall for the second time.

[0023] Step 5: Loosen the pressure plate, and the reset spring pushes the sliding plate to make the clamping rod re-engage into the clamping hole, fixing the angle of the grouting pipe. After the grouting liquid solidifies in the grouting hole, the reinforcement of the building masonry cracks is completed.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] This invention features a scraper with a notch on the grouting pipe. As the scraper slides into the grouting hole, it directly scrapes away residual dust from the sidewall. The residual mortar generated during cleaning can be discharged through the notch at the bottom of the scraper, effectively preventing impurities in the hole from interfering with the bonding between the grout and the masonry. This solves the problem of reinforcement failure caused by incomplete cleaning of impurities in traditional reinforcement methods, laying the foundation for effective reinforcement. Furthermore, during the grouting process, as the grouting hole is filled with grout, the pressure generated by the grout pushes the scraper to move. During this process, the scraper can scrape the sidewall of the grouting hole again, further pushing out residual mortar, ensuring the cleanliness of the hole, and preventing trace amounts of residual mortar after the initial cleaning from affecting the grout's setting effect. This allows the grout to fill the grouting hole more evenly, forming a more stable whole with the masonry, significantly improving the reliability of the reinforcement and extending the service life of the building.

[0026] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0027] In the attached diagram:

[0028] Figure 1 A three-dimensional diagram of a reinforcement device for masonry walls in historical buildings;

[0029] Figure 2 A partial cross-sectional view of a reinforcement device for masonry walls in a historical building;

[0030] Figure 3 A partial structure of a historical building masonry wall reinforcement device Figure 1 ;

[0031] Figure 4 A partial structure of a historical building masonry wall reinforcement device Figure 2 ;

[0032] Figure 5 A partial structure of a historical building masonry wall reinforcement device Figure 3 ;

[0033] Figure 6 A partial structure of a historical building masonry wall reinforcement device Figure 4 ;

[0034] Figure 7 This is a sectional view of the positioning sleeve of a reinforcement device for masonry walls in historical buildings.

[0035] In the diagram: 1. Masonry; 2. Grouting hole; 3. Base plate; 4. Cover plate; 5. Grouting pipe; 6. Limiting seat; 7. Scraper; 8. Limiting rod; 9. Notch; 10. Baffle; 11. Slide rail; 12. Insert rod; 13. Insert plate; 14. Turntable; 15. Connecting cover; 16. Sealing plate; 17. Top rod; 18. Ball bearing; 19. Guide block; 20. Inclined surface; 21. Cover plate; 22. Positioning frame; 23. Compression spring; 24. Rocker arm; 25. Positioning sleeve; 26. Locking hole; 27. Slide plate; 28. Locking rod; 29. ​​Connecting rod; 30. Pressure plate; 31. Return spring; 32. Mounting hole; 33. Discharge port. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0037] Example 1:

[0038] like Figures 1 to 7 As shown, a reinforcement device for masonry walls of historical buildings includes masonry 1.

[0039] The building masonry 1 has a grouting hole 2 inside. The grouting hole 2 is inclined. The inlet of the grouting hole 2 is provided with a cover plate 4. A grouting pipe 5 is installed through the cover plate 4. The outlet of the grouting pipe 5 is located at the bottom of the grouting hole 2.

[0040] A scraper 7 is inserted into the grouting pipe 5. When the scraper 7 has a notch 9 at the bottom, as the scraper 7 slides into the grouting hole 2, it cleans the dust remaining on the side wall of the grouting hole 2 and discharges it from the notch 9. A baffle 10 is rotatably installed on the side wall of the notch 9. After cleaning, the grouting pipe 5 is rotated to drive the baffle 10 connected synchronously to rotate and seal the notch 9.

[0041] A connecting cover 15 is installed at the connection port of the grouting pipe 5. A sealing plate 16 for the grouting pipe 5 is inserted into the connecting cover 15. A top rod 17 is installed on the sealing plate 16. The end of the top rod 17 is slidably connected to the guide block 19 installed on the cover plate 4. An inclined surface 20 is installed on the guide block 19. When the grouting pipe 5 rotates, the top rod 17 slides along the inclined surface 20, and the sealing plate 16 gradually loses its seal on the grouting pipe 5.

[0042] During the grouting process, the grouting hole 2 is filled with grouting liquid, which pushes the scraper 7 to move and push out the residual mortar.

[0043] like Figures 1 to 7As shown, in a specific embodiment, a limiting rod 8 is installed inside the cover plate 4, and a base plate 3 is installed at the end of the limiting rod 8. The base plate 3 and the cover plate 4 have the same diameter, and the base plate 3 is attached to the bottom of the grouting hole 2. The limiting rod 8 and the cover plate 4 are movably connected. The grouting hole 2 is opened at the crack of the masonry 1. A limiting seat 6 is installed on the limiting rod 8, and the limiting seat 6 is rotatably connected to the grouting pipe 5. A discharge port 33 is opened at the bottom of the cover plate 4 for discharging residual mortar. The base plate and the cover plate cooperate to fix the positions of both ends of the grouting hole, ensuring the stability of the device installation. The limiting seat enables the rotatable connection of the grouting pipe, and the discharge port provides a channel for the discharge of residual mortar, ensuring a smooth cleaning process.

[0044] like Figures 1 to 7 As shown, furthermore, a slide rail 11 is installed on the scraper 7, and a baffle 10 is slidably disposed on the slide rail 11. The slide rail 11 is in an arc shape, and an insert rod 12 is installed on the baffle 10. A turntable 14 is movably inserted into the side wall of the insert rod 12. The turntable 14 is rotatably connected to the cover plate 4, and the center of the turntable 14 is connected to the grouting pipe 5. An insert plate 13 is installed at the end of the insert rod 12, and the diameter of the insert plate 13 is larger than the diameter of the insert rod 12. The arc-shaped slide rail ensures that the baffle fits the notch when rotating and sealing, and the insert plate prevents the insert rod from falling out of the turntable, ensuring the stability of the baffle adjustment process, thereby ensuring the sealing effect.

[0045] Example 2:

[0046] The difference between the above embodiments and this embodiment is that: Figures 1 to 7 As shown, mounting holes 32 are installed at the four corners of the connecting cover 15, facilitating connection with the slurry conveying unit. A ball bearing 18 is mounted on the top of the top rod 17, with its top rolling against the side wall of the guide block 19. A cover plate 21 is installed on the side wall of the top rod 17, and a positioning frame 22 is movably inserted into the side wall of the top rod 17. The positioning frame 22 is U-shaped, and a compression spring 23 is sleeved on the top rod 17. One end of the compression spring 23 is engaged with the bottom of the cover plate 21, and the other end is engaged with the positioning frame 22. The mounting holes simplify the connection process with the slurry conveying unit, the ball bearings reduce friction between the top rod and the guide block, and the compression spring ensures that the top rod always fits against the guide block, improving the structural stability.

[0047] like Figures 1 to 7 As shown in the specific embodiment, a rocker arm 24 is installed on the side wall of the grouting pipe 5, and a positioning sleeve 25 is installed through the rocker arm 24. A locking rod 28 is movably inserted into the positioning sleeve 25. A pair of locking holes 26 are opened on the cover plate 4, and the locking holes 26 are equidistant from the center point of the cover plate 4. The locking rod 28 is inserted into the locking hole 26 to position the angle of the grouting pipe 5. Through the cooperation of the locking rod and the locking hole, the angle of the grouting pipe can be accurately fixed, avoiding the displacement of the grouting pipe during the grouting process and ensuring the stability of the grouting operation.

[0048] like Figures 1 to 7 As shown, furthermore, a sliding plate 27 is movably inserted into the positioning sleeve 25. One end of the sliding plate 27 is connected to the locking rod 28, and the other end of the sliding plate 27 is equipped with a connecting rod 29. The connecting rod 29 movably passes through the positioning sleeve 25, and a pressure plate 30 is installed at the end of the connecting rod 29. A return spring 31 is sleeved on the connecting rod 29 located on the inner wall of the positioning sleeve 25. One end of the return spring 31 is engaged with the sliding plate 27, and the other end of the return spring 31 is engaged with the inner wall of the positioning sleeve 25. The return spring enables the locking rod to automatically reset without manual insertion or removal, simplifying the unlocking and locking operations and improving work efficiency.

[0049] This invention also discloses a method for reinforcing masonry walls of historical buildings, the steps of which are as follows:

[0050] Step 1: Open an inclined grouting hole 2 at the crack in the masonry 1, attach the base plate 3 to the bottom of the grouting hole 2, fix the position of the base plate 3 and the cover plate 4 by the limiting rod 8 that moves through the cover plate 4, and then rotate the grouting pipe 5 to the limiting rod 8 through the limiting seat 6 so that the outlet of the grouting pipe 5 extends to the bottom of the grouting hole 2.

[0051] Step 2: Push the scraper 7 inserted on the grouting pipe 5 into the grouting hole 2 and use the side wall of the scraper 7 to scrape away the dust in the hole. The residual mortar is discharged through the bottom notch 9 of the scraper 7 and the discharge port 33 of the cover plate 4. At this time, the baffle 10 at the notch 9 remains open.

[0052] Step 3: Pull the pressure plate 30 at the end of the positioning sleeve 25 on the rocker arm 24, and drive the slide plate 27 to compress the reset spring 31 through the connecting rod 29, so that the locking rod 28 can be pulled out from the locking hole 26 of the cover plate 4 to unlock; rotate the grouting pipe 5, and simultaneously drive the turntable 14 to rotate the baffle 10 along the slide rail 11 to seal the notch 9, and the rocker arm 24 drives the top rod 17 to slide along the inclined surface 20 of the guide block 19, so that the sealing plate 16 releases the seal on the grouting pipe 5;

[0053] Step 4: Connect the grout delivery unit through the mounting hole 32 of the connecting cover 15, and inject the grout into the grouting hole 2 through the grouting pipe 5. After the grout fills the hole, push the scraper 7 to move upward and scrape off the residual mortar on the hole wall for the second time.

[0054] Step 5: Loosen the pressure plate 30, and the reset spring 31 pushes the slide plate 27 to make the clamping rod 28 re-clamp into the clamping hole 26, fix the angle of the grouting pipe 5, and wait for the grout to solidify in the grouting hole 2 to complete the reinforcement of the crack in the building masonry 1.

[0055] The implementation principle of the historical building masonry wall reinforcement device of the present invention is as follows:

[0056] Before the formal reinforcement work, the crack locations of the masonry 1 need to be pre-treated. Grouting holes 2 are opened at the cracks in the masonry 1, ensuring that the grouting holes 2 are inclined to facilitate subsequent grout flow and filling. Then, the base plate 3 is attached to the bottom of the grouting hole 2. The position of the base plate 3 and the cover plate 4 is fixed by the limiting rod 8 that moves through the inside of the cover plate 4. The base plate 3 and the cover plate 4 have the same diameter, ensuring stable coverage of both ends of the grouting hole 2. Simultaneously, the discharge port 33 on the cover plate 4 provides a channel for the discharge of residual mortar during subsequent cleaning, completing the preliminary preparation work. At this point, the grouting pipe 5 is rotatably connected to the limiting rod 8 via the limiting seat 6, initially achieving the installation and positioning of the grouting pipe 5 on the cover plate 4. The outlet of the grouting pipe 5 extends to the bottom of the grouting hole 2, laying the foundation for the subsequent grout to reach the depths of the crack.

[0057] Next, the dust and residual mortar inside the grouting hole 2 will be cleaned. Since the scraper 7 is inserted into the grouting pipe 5 and has a notch 9 at its bottom, the operator can push the scraper 7 along the grouting pipe 5 towards the inside of the grouting hole 2. During this sliding process, the side wall of the scraper 7 makes close contact with the side wall of the grouting hole 2, scraping away the residual dust inside the hole. The scraped dust and residual mortar will be discharged through the notch 9 and finally exited from the outside of the grouting hole 2 through the discharge port 33 on the cover plate 4. During the cleaning process, the baffle 10, which is rotatably installed on the side wall of the notch 9, is in the open state, which does not affect the discharge of residual mortar.

[0058] After cleaning is completed, the angle lock between the grouting pipe 5 and the rocker arm 24 must be unlocked before the grouting pipe 5 can be rotated: the operator pulls the pressure plate 30 at the end of the positioning sleeve 25 on the rocker arm 24. The pressure plate 30 drives the sliding plate 27 inside the positioning sleeve 25 to slide through the connecting rod 29. The sliding plate 27 compresses the reset spring 31 sleeved on the connecting rod 29. At the same time, the sliding plate 27 drives the locking rod 28 to be pulled out from the locking hole 26 on the cover plate 4, releasing the angle fixation of the rocker arm 24 and the grouting pipe 5.

[0059] After unlocking, the operator rotates the grouting pipe 5. This rotation will simultaneously perform two key operations: First, because the grouting pipe 5 is connected to the center of the turntable 14, the turntable 14 will simultaneously drive the insert rod 12 and the baffle 10, which is slidably connected to the insert rod 12 through the slide rail 11, to rotate until the baffle 10 completely covers the notch 9, thereby sealing the notch 9 and preventing grout from leaking from the notch 9 during subsequent grouting. The diameter of the insert plate 13 installed at the end of the insert rod 12 is larger than the diameter of the insert rod 12, which can prevent the insert rod 12 from falling off the turntable 14 and ensure the stability of the baffle 10 adjustment process. On the other hand, as the grouting pipe 5 rotates synchronously, the rocker arm 24 connected to the grouting pipe 5 also rotates, causing the ball bearing 18 at the top of the top rod 17 to roll along the inclined surface 20 of the side wall of the guide block 19. Under the guidance of the inclined surface 20, the top rod 17 gradually slides outward, thereby causing the sealing plate 16, which was originally in a sealed state at the connection of the grouting pipe 5, to move outward synchronously, so that the sealing plate 16 gradually loses its sealing effect on the grouting pipe 5, opening the channel in advance for the subsequent grouting fluid to enter the grouting pipe 5, realizing the linkage operation of the sealing of the baffle 10 and the unsealing of the sealing plate 16. During this process, the baffle 21 on the side wall of the top rod 17 will release the potential energy compressed by the compression spring 23, ensuring the tight fit between the top rod and the guide block.

[0060] After cleaning and the aforementioned linkage sealing operation are completed, the grouting stage begins. First, the connecting cover 15 is connected to the grout delivery unit through the mounting holes 32 at its four corners, ensuring unobstructed grout delivery channels. The grout delivery unit delivers the grout to the grouting pipe 5 through the connecting cover 15. The grout flows into the grouting hole 2 through the outlet of the grouting pipe 5. As the grout is continuously injected, the grouting hole 2 gradually fills with grout. The pressure generated by the grout pushes the scraper 7 upwards along the grouting pipe 5. During the movement of the scraper 7, its sidewall scrapes the sidewall of the grouting hole 2 again, further pushing out any remaining mortar, ensuring the inside of the grouting hole 2 is clean and preventing residual mortar from affecting the bonding effect between the grout and the masonry 1.

[0061] To ensure the stability of the angle of the grouting pipe 5 during the cleaning and grouting process, the grouting pipe 5 needs to be positioned and fixed. When it is necessary to fix the angle of the grouting pipe 5, the operator releases the pressing plate 30, and the elastic potential energy of the return spring 31 pushes the sliding plate 27 to reset. The sliding plate 27 drives the locking rod 28 to be re-inserted into the corresponding locking hole 26 on the cover plate 4. Through the connection between the positioning sleeve 25 and the rocker arm 24, the angle of the grouting pipe 5 is fixed, ensuring the stable progress of the grouting operation, and finally completing the reinforcement of the cracks in the building masonry 1.

Claims

1. A reinforcement device for masonry walls of historical buildings, comprising masonry (1), characterized in that: The building masonry (1) has grouting holes (2) inside. The grouting holes (2) are inclined. The inlet of the grouting hole (2) is provided with a cover plate (4). A grouting pipe (5) is installed through the cover plate (4). The outlet of the grouting pipe (5) is located at the bottom of the grouting hole (2). A scraper (7) is inserted into the grouting pipe (5). When the scraper (7) has a notch (9) at the bottom, the scraper (7) slides into the grouting hole (2) to clean the dust remaining on the side wall of the grouting hole (2) and discharges it from the notch (9). A baffle (10) is rotatably installed on the side wall of the notch (9). After cleaning, the grouting pipe (5) is rotated to drive the baffle (10) connected synchronously to rotate and seal the notch (9). A connecting cover (15) is installed at the connection port of the grouting pipe (5). A sealing plate (16) for the grouting pipe (5) is inserted into the connecting cover (15). A top rod (17) is installed on the sealing plate (16). The end of the top rod (17) is slidably connected to a guide block (19) installed on the cover plate (4). An inclined surface (20) is installed on the guide block (19). When the grouting pipe (5) rotates, the top rod (17) slides along the inclined surface (20), and the sealing plate (16) gradually loses its seal on the grouting pipe (5). During the grouting process, the grouting hole (2) is filled with grout and pushes the scraper (7) to move, pushing out the residual mortar.

2. The historical building masonry wall reinforcement device according to claim 1, characterized in that, A limiting rod (8) is installed inside the cover plate (4). A base plate (3) is installed at the end of the limiting rod (8). The base plate (3) and the cover plate (4) have the same diameter, and the base plate (3) is attached to the bottom of the grouting hole (2). The limiting rod (8) and the cover plate (4) are movably connected. The grouting hole (2) is opened at the crack of the building masonry (1). A limiting seat (6) is installed on the limiting rod (8). The limiting seat (6) is rotatably connected to the grouting pipe (5). A discharge port (33) is opened at the bottom of the cover plate (4). The discharge port (33) is used to discharge residual mortar.

3. The historical building masonry wall reinforcement device according to claim 1, characterized in that, The scraper (7) is equipped with a slide rail (11), and a baffle (10) is slidably arranged on the slide rail (11). The slide rail (11) is in an arc state. A rod (12) is installed on the baffle (10). A turntable (14) is movably inserted into the side wall of the rod (12). The turntable (14) is rotatably connected to the cover plate (4). The center of the turntable (14) is connected to the grouting pipe (5). A plate (13) is installed at the end of the rod (12), and the diameter of the plate (13) is larger than the diameter of the rod (12).

4. The historical building masonry wall reinforcement device according to claim 1, characterized in that, The connecting cover (15) has mounting holes (32) at its four corners. The mounting holes (32) facilitate connection with the slurry conveying unit. The top of the top rod (17) is equipped with a ball bearing (18), and the top of the ball bearing (18) is rolled to the side wall of the guide block (19).

5. The device for reinforcing masonry walls of historical buildings according to claim 1, characterized in that, A cover plate (21) is installed on the side wall of the top rod (17), and a positioning frame (22) is movably inserted into the side wall of the top rod (17). The positioning frame (22) is U-shaped.

6. The device for reinforcing masonry walls of historical buildings according to claim 1, characterized in that, A rocker arm (24) is installed on the side wall of the grouting pipe (5). A positioning sleeve (25) is installed through the rocker arm (24). A locking rod (28) is movably inserted inside the positioning sleeve (25). A pair of locking holes (26) are opened on the cover plate (4). The locking holes (26) are at the same distance from the center point of the cover plate (4). The locking rod (28) is inserted into the locking hole (26) to position the angle of the grouting pipe (5).

7. A reinforcement device for masonry walls of historical buildings according to claim 6, characterized in that, The positioning sleeve (25) is equipped with a sliding plate (27) that is movably inserted inside. One end of the sliding plate (27) is connected to the locking rod (28), and the other end of the sliding plate (27) is equipped with a connecting rod (29). The connecting rod (29) movably passes through the positioning sleeve (25).

8. A reinforcement device for masonry walls of historical buildings according to claim 5, characterized in that, A compression spring (23) is sleeved on the top rod (17). One end of the compression spring (23) is engaged with the bottom of the cover plate (21), and the other end of the compression spring (23) is engaged with the positioning frame (22).

9. A reinforcement device for masonry walls of historical buildings according to claim 7, characterized in that, A pressure plate (30) is installed at the end of the connecting rod (29). A reset spring (31) is sleeved on the connecting rod (29) located on the inner side wall of the positioning sleeve (25). One end of the reset spring (31) is clamped on the slide plate (27), and the other end of the reset spring (31) is clamped on the inner side wall of the positioning sleeve (25).

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