Grouting repair system based on composite high polymer and method for using same

Abstract

Disclosed are a grouting repair system based on a composite high polymer and a method for using same. The grouting repair system comprises a bottom plate, and an insertion hole is formed in the middle of the bottom plate. A grouting pipe is inserted into the insertion hole. A sealing assembly is further arranged on the bottom plate. The sealing assembly comprises a lifting frame, and the lifting frame is connected to the bottom plate so as to slide up and down. A plurality of supporting frames are evenly arranged on the lifting frame, and sliding blocks are slidably connected to the supporting frames. Pressing plates are arranged below the sliding blocks. According to the present invention, all of the pressing plates will synchronously slide downwards by means of downward sliding of the lifting frame, then all of the pressing plates can seal an opening part of a pavement crack below the bottom plate. The grouting pipe is inserted into the interior of the crack, at which time polyurethane is injected into the interior of the crack from the interior of a liquid outlet hole. Since the pavement crack is sealed by the pressing plates, the polyurethane injected into the crack can be prevented from flowing out through the opening part of the pavement crack prematurely before the crack is fully filled. As a result, complete filling of polyurethane within a crack can be ensured, thereby improving the quality of polyurethane repairing a pavement crack.

Description

A composite polymer-based grouting repair system and its use method Technical Field

[0001] The present invention relates to the technical field of road surface repair, in particular to a composite polymer-based grouting repair system and a use method thereof. Background Art

[0002] Pavement cracks are a common problem in road construction. If not repaired promptly, they can cause damage to the road surface and traffic inconvenience. Traditional methods for repairing pavement cracks typically involve filling them with polyurethane materials. However, during this process, polyurethane is typically injected directly into the crack opening. This process can cause premature overflow of the polyurethane from the crack opening before the crack is fully filled, leaving areas deep within the crack unfilled, resulting in poor repair results. Therefore, a composite polymer-based grouting repair system and its use method have been proposed.

[0003] Summary of the Invention

[0004] The purpose of the present invention is to provide a grouting repair system based on a composite polymer and a method of using the same to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grouting repair system based on composite polymer and its use method, comprising a base plate, a plurality of lifting rings are provided on the upper surface of the base plate, the lifting rings are used in conjunction with external steel wire ropes and suspension components to facilitate the movement of the base plate position, an insertion hole is provided in the middle of the base plate, a hollow grouting pipe for injecting polyurethane into the road surface cracks is inserted into the insertion hole, a plurality of liquid outlet holes are evenly provided on the side wall of the grouting pipe, when repairing the road surface cracks, the grouting pipe is inserted into the cracks, and polyurethane is then injected from the inside of the liquid outlet hole. Inside the crack, the foaming reaction of polyurethane causes the expansion and volume increase of the polyurethane material injected into the crack, which can fill, repair, connect and repair the cracks in the road surface, thereby improving the overall strength of the road surface. A closing component is also provided on the base plate, and the closing component includes a lifting frame, which is connected to the base plate for sliding up and down. A plurality of U-shaped support frames are evenly arranged on the lifting frame, and each support frame is slidably connected to a slider, and a pressure plate capable of closing the mouth of the road surface crack is provided below the slider, and the sides of adjacent pressure plates are in contact with each other.

[0006] Preferably, the four corners of the upper surface of the base plate are fixedly connected to guide pillars, and the four corners of the lifting frame are slidably sleeved on the relative guide pillars. The guide pillars are arranged perpendicular to the upper surface of the base plate. The four guide pillars can make the lifting frame slide more stably on the base plate. A bracket is fixedly connected to the base plate, and an electric push rod is fixedly installed on the bracket. The output shaft of the electric push rod is connected to the side wall of the lifting frame. There are two brackets, and the two brackets are arranged on both sides of the base plate. An electric push rod is provided on each bracket. The two electric push rods can operate synchronously to drive the lifting frame to slide up or down.

[0007] Preferably, a connecting column is fixedly connected to the pressure plate, and the connecting column is slidably sleeved on the slider. A spring for pressing the pressure plate is connected to the connecting column and located between the slider and the pressure plate, and a baffle is fixedly connected to the end of the connecting column away from the pressure plate.

[0008] Preferably, the pressure plate and the connecting column are provided with through holes which pass through the through holes from top to bottom, and a blocking rod is movably inserted into the through holes.

[0009] Preferably, each support frame includes two cross bars and a fixed plate. The two cross bars are arranged in parallel, one end of the two cross bars is connected through the fixed plate, and a first bolt is provided on the side wall of the fixed plate, and the threaded end of the first bolt is engaged and connected to the side wall of the lifting frame.

[0010] Preferably, the upper end of the grouting pipe is connected to a slurry guide assembly for injecting polyurethane into the grouting pipe, and the slurry guide assembly includes a delivery pipe, which is connected to the upper end of the grouting pipe, and the delivery pipe is connected to the inner cavity of the grouting pipe. The upper end of the delivery pipe is also connected to multiple material pipes, and the number of material pipes is three. The material pipes are overlapped on a bracket, and the three material pipes are connected to a conveyor at one end away from the delivery pipe, and the three material pipes can separately transport isocyanate, polyether polyol and catalyst, and the interior of the delivery pipe is provided with a mixing blade for mixing isocyanate, polyether polyol and catalyst.

[0011] Preferably, the lower end of the grouting pipe is open. After the grouting pipe is removed, both the upper and lower ends of the grouting pipe are open. Flushing one end with cleaning fluid facilitates flushing of the polyurethane in the grouting pipe from the other end, thereby improving the cleaning efficiency of the grouting pipe.

[0012] A composite polymer-based grouting repair method, comprising the following steps:

[0013] Step 1: Place the base plate above the crack, determine the base plate placement position and the position of the grouting pipe and mark them, then remove the base plate and drill a hole at the marked grouting pipe position. The hole should be on the crack so that the grouting pipe can be inserted into the hole and placed in the crack.

[0014] Step 2: Put the bottom plate back to the marked position, connect the grouting pipe to the delivery pipe, and then insert the grouting pipe into the drilled hole from the insertion hole. At the same time, move the slider to press the pressure plate against the mouth of the crack.

[0015] Step 3: Except for the two blocking rods farthest from the grouting pipe, remove the other blocking rods from the through hole and use the through hole to penetrate the polyurethane filling crack;

[0016] Step 4: Use the slurry guide assembly to inject the mixed polyurethane into the grouting pipe, so that the polyurethane in the grouting pipe is injected into the crack, and observe whether polyurethane flows out from the through-hole. When polyurethane appears in the through-hole, use the blocking rod to insert the through-hole, indicating that the crack below the through-hole is filled with polyurethane. After all the through-holes are blocked with the blocking rod, stop injecting polyurethane into the crack;

[0017] Step 5: Remove the base plate and wait for the polyurethane injected into the crack to foam and solidify, and the road crack repair is completed.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention slides downward through the lifting frame, the lifting frame will slide downward with the support frame, each slider will slide downward synchronously, all the pressure plates will slide downward synchronously, and then all the pressure plates can seal the openings of the pavement cracks below the bottom plate. At this time, the grouting pipe is inserted into the inside of the crack, and polyurethane is injected into the crack from the inside of the liquid outlet. In this way, since the pavement cracks are sealed by the pressure plates, when the cracks are not fully filled, the polyurethane injected into the cracks can be prevented from flowing out of the openings of the pavement cracks in advance, ensuring that the cracks can be filled with polyurethane, and improving the quality of polyurethane repair of pavement cracks, thereby improving the overall strength of the pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic diagram of the overall structure of the present invention I;

[0020] FIG2 is a schematic diagram II of the overall structure of the present invention;

[0021] FIG3 is a schematic diagram III of the overall structure of the present invention;

[0022] FIG4 is an exploded view of the bottom plate, grouting pipe and lifting frame of the present invention;

[0023] FIG5 is a schematic structural diagram of a sealing assembly of the present invention;

[0024] FIG6 is an exploded view of the slider, pressure plate and blocking rod of the present invention;

[0025] FIG7 is a cross-sectional exploded view of the slider, pressure plate, connecting column and blocking rod of the present invention;

[0026] FIG8 is a cross-sectional exploded view of the bottom plate, insertion hole, grouting pipe and delivery pipe of the present invention;

[0027] FIG9 is a schematic structural diagram of a grouting pipe according to the present invention;

[0028] FIG10 is a schematic structural diagram of the grouting pipe and the delivery pipe of the present invention;

[0029] FIG11 is a schematic structural diagram of the conveying pipe and the material pipe of the present invention.

[0030] In the figure: 1. Base plate, 2. Insertion hole, 3. Grouting pipe, 301. Liquid outlet, 302. Ring groove, 4. Closing assembly, 401. Lifting frame, 402. Support frame, 4021. Cross bar, 4022. Fixed plate, 403. Slider, 404. Pressing plate, 5. Slurry guide assembly, 501. Conveying pipe, 502. Material pipe, 503. Mixing blade, 6. Guide column, 7. Bracket, 8. Connecting column, 9. Spring, 10. Baffle, 11. Through hole, 12. Blocking rod, 13. Electric push rod, 14. First bolt, 15. Second bolt, 16. Lifting ring. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Please refer to Figures 1-11. The present invention provides a technical solution: a grouting repair system based on a composite polymer and a method for using the same, comprising a base plate 1. As shown in Figure 1, a plurality of lifting rings 16 are provided on the upper surface of the base plate 1. The lifting rings 16 are used in conjunction with external steel wire ropes and suspension components to facilitate movement of the base plate 1. An insertion hole 2 is provided in the middle of the base plate 1. A hollow grouting pipe 3 for injecting polyurethane into cracks in the road surface is inserted into the interior of the insertion hole 2. A plurality of liquid outlet holes 301 are evenly provided on the side wall of the grouting pipe 3. When repairing cracks in the road surface, the grouting pipe 3 is inserted into the interior of the crack. At this time, polyurethane is injected into the interior of the crack from the interior of the liquid outlet hole 301. Similarly, the foaming reaction of polyurethane causes the expansion and volume increase of the polyurethane material injected into the cracks, which can fill, repair, connect and repair the cracks in the road surface, thereby improving the overall strength of the road surface. The base plate 1 is also provided with a closing component 4, and the closing component 4 includes a lifting frame 401, and the lifting frame 401 is connected to the base plate 1 by sliding up and down. A plurality of U-shaped support frames 402 are evenly arranged on the lifting frame 401, and each support frame 402 is slidably connected to at least one slider 403 (or multiple sliders), and a pressure plate 404 capable of closing the opening of the road surface crack is provided below the slider 403, and the sides of adjacent pressure plates 404 are in contact with each other;

[0033] As shown in FIG1 , the support frames 402 are symmetrically distributed with the grouting pipes 3. When repairing pavement cracks, the bottom plate 1 is placed above the pavement cracks, and the placement of the support frames 402 is roughly perpendicular to the direction of the pavement cracks (as shown in FIG2 and FIG3 , that is, the pavement cracks are below each support frame 402). The insertion hole 2 is facing the pavement cracks, and then each slider 403 is slid, causing the slider 403 to slide on the support frame 402 with the pressure plate 404, so that the pressure plate 404 can move to the top of the crack. When each pressure plate 404 slides to the top of the crack, a section of the crack mouth below the bottom plate 1 will be covered by all the pressure plates 404. In this state, the lifting frame 403 is driven 01 slides downward, the lifting frame 401 will slide downward with the support frame 402, and each slider 403 will slide downward synchronously, so that all the pressure plates 404 will slide downward synchronously, and then all the pressure plates 404 can seal the mouth of the pavement crack below the bottom plate 1. At this time, the grouting pipe 3 is inserted into the inside of the crack, and polyurethane is injected into the crack from the inside of the liquid outlet 301. In this way, since the pavement crack is closed by the pressure plate 404, when the crack is not filled, the polyurethane injected into the crack can be prevented from flowing out of the mouth of the pavement crack in advance, ensuring that the crack can be filled with polyurethane, which can improve the quality of polyurethane repair of pavement cracks, thereby improving the overall strength of the pavement.

[0034] As shown in Figure 4, in order to drive the lifting frame 401 to slide on the base plate 1 and facilitate the lifting frame 401 to slide steadily on the base plate 1, specifically, the four corners of the upper surface of the base plate 1 are fixedly connected to guide columns 6, and the four corners of the lifting frame 401 are slidably sleeved on the relative guide columns 6, and the guide columns 6 are arranged perpendicular to the upper surface of the base plate 1. In this way, the four guide columns 6 can make the lifting frame 401 slide more stably on the base plate 1, and a bracket 7 is fixedly connected to the base plate 1. An electric push rod 13 is fixedly installed on the bracket 7, and the output shaft of the electric push rod 13 is connected to the side wall of the lifting frame 401. As shown in Figure 1, two brackets 7 are provided, and the two brackets 7 are provided on both sides of the base plate 1. Each bracket 7 is provided with an electric push rod 13. The two electric push rods 13 can operate synchronously to drive the lifting frame 401 to slide up or down.

[0035] As shown in Figures 6 and 7, when the road surface is uneven, in order to make multiple pressure plates 404 adapt to the uneven road surface so as to seal the cracks on the uneven road surface, specifically, the pressure plate 404 is fixedly connected with a connecting column 8, and the connecting column 8 is slidably sleeved on the slider 403. A spring 9 for pressing the pressure plate 404 is connected to the connecting column 8 and is located between the slider 403 and the pressure plate 404, and a baffle 10 is fixedly connected to the end of the connecting column 8 away from the pressure plate 404. The pressure plate 404, the connecting column 8 and the baffle 10 are an integrated structure. The slider 40 3 is located between the pressure plate 404 and the baffle 10. Under the pressure of the spring 9, the baffle 10 abuts against the side wall of the slider 403. When the lifting frame 401 slides downward to cause the slider 403 to move downward with the pressure plate 404, when the road surface is uneven, the higher road surface will press against the pressure plate 404, causing the pressure plate 404 to compress the spring 9 and slide relative to the slider 403. In this way, the surface of the crack blocking portion formed by the lower surface of each pressure plate 404 adapts to the uneven surface of the road surface. In this way, multiple pressure plates 404 can adapt to the uneven road surface so as to block the crack openings on the uneven road surface.

[0036] As shown in Figures 6 and 7, in order to know whether each position of the crack is filled with polyurethane, specifically, the pressure plate 404 and the connecting column 8 are provided with a through hole 11 that passes through from top to bottom, and the internal movably inserted into the through hole 11 is provided with a blocking rod 12. As shown in Figure 7, the upper end of the through hole 11 is provided with an internal thread, and the upper end of the blocking rod 12 can be provided with an external thread and a hexagonal head for driving the blocking rod 12 to rotate. The internal thread on the through hole 11 is adapted to the external thread on the blocking rod 12. When the pressure plate 404 is used to seal the crack mouth and the grouting pipe 3 is used to inject polyurethane into the crack, all the blocking rods 12 in the through holes 11 are driven to rotate. 2. During the process of injecting polyurethane into the cracks, observe whether polyurethane gushes out from the through-hole 11. When polyurethane appears in the through-hole 11, insert the blocking rod 12 into the through-hole 11 and fix the blocking rod 12 in the through-hole 11 using internal and external threads. This means that the crack below the through-hole 11 is filled with polyurethane. Since the through-hole 11 is blocked at this location, the polyurethane will flow to other locations of the crack. After all the through-holes 11 are blocked with the blocking rod 12, stop injecting polyurethane into the crack, then remove the base plate 1, and after the polyurethane injected into the crack foams and solidifies, the road crack repair is completed.

[0037] As shown in FIG5 , in order to increase the number of sliders 403 on the support frame 402 (i.e., increase the number of pressure plates 404 on the same support frame 402), specifically, each support frame 402 includes two cross bars 4021 and a fixed plate 4022. The two cross bars 4021 are arranged in parallel, and one end of the two cross bars 4021 is connected through the fixed plate 4022. A first bolt 14 is provided on the side wall of the fixed plate 4022. The threaded end of the first bolt 14 is engaged and connected to the side wall of the lifting frame 401. A socket for plugging the cross bars 4021 is provided on the side wall of the lifting frame 401. When the support frame 402 is installed on the lifting frame 401, the ends of the two cross bars 4021 away from the fixed plate 4022 are aligned with the sockets on the lifting frame 401, and the fixed plate 4022 is pushed to promote The fixing plate 4022 is made to fit on the lifting frame 401. At this time, the two cross bars 4021 are installed on the lifting frame 401, and the first bolts 14 are screwed on the side walls of the lifting frame 401 to fix the support frame 402. When it is necessary to add a slider 403 to the support frame 402, the first bolts 14 are unscrewed, and then the fixing plate 4022 is pulled, so that the cross bar 4021 is pulled to the state shown in Figure 5. At this time, the slider 403 can be installed on the cross bar 4021 from the end of the cross bar 4021 away from the fixing plate 4022. After the slider 403 is installed, the fixing plate 4022 is pushed again to make the fixing plate 4022 fit on the lifting frame 401, and the first bolts 14 are screwed on the side walls of the lifting frame 401 to complete the operation of adding the slider 403 to the support frame 402.

[0038] Adding multiple sliders 403 on the same support frame 402 can seal the cracks on the road surface that have cracked along the length direction of the crossbar 4021, which is conducive to sealing the cracks more thoroughly.

[0039] Specifically, the upper end of the grouting pipe 3 is connected to a slurry guide component 5 for injecting polyurethane into the grouting pipe 3, and the slurry guide component 5 includes a delivery pipe 501, the delivery pipe 501 is connected to the upper end of the grouting pipe 3, and the delivery pipe 501 is communicated with the inner cavity of the grouting pipe 3, and the upper end of the delivery pipe 501 is simultaneously connected to a plurality of material pipes 502, the number of material pipes 502 is three, and the material pipes 502 are overlapped on a bracket 7, and the three material pipes 502 are connected to a conveyor at one end away from the delivery pipe 501, and the three material pipes 502 can separately transport isocyanate, polyether polyol and catalyst, and the interior of the delivery pipe 501 is provided with a material pipe 502 for transporting isocyanate. The mixing blade 503 is used to mix the isocyanate, polyether polyol and catalyst. When the material pipe 502 injects the isocyanate, polyether polyol and catalyst into the interior of the delivery pipe 501 at the same time, the isocyanate, polyether polyol and catalyst are mixed and flow downward. Under the action of the mixing blade 503, the isocyanate, polyether polyol and catalyst are mixed and flow irregularly to achieve full mixing of the isocyanate, polyether polyol and catalyst to form polyurethane. Then the polyurethane flows from the delivery pipe 501 to the grouting pipe 3. Finally, the polyurethane can be injected into the crack from the grouting pipe 3. Of course, if other materials need to be added, there can be more material pipes 502 in the structure of the present application.

[0040] In addition, in order to be able to separate the grouting pipe 3 and the conveying pipe 501, the upper end of the grouting pipe 3 is inserted into the lower end of the conveying pipe 501, and an annular groove 302 is provided on the upper end side wall of the grouting pipe 3, and a plurality of second bolts 15 are provided on the lower end side wall of the conveying pipe 501. When the upper end of the grouting pipe 3 is inserted into the lower end of the conveying pipe 501, the second bolt 15 is screwed, and the threaded end of the second bolt 15 is inserted into the inside of the annular groove 302, so that the grouting pipe 3 and the conveying pipe 501 can be fixed. When the grouting pipe 3 needs to be disassembled, it is only necessary to turn the threaded end of the second bolt 15 out of the annular groove 302, and the grouting pipe 3 and the conveying pipe 501 can be separated.

[0041] As shown in Figure 9, in order to facilitate the cleaning of the grouting pipe 3, specifically, the lower end of the grouting pipe 3 is open. After the grouting pipe 3 is removed, the upper and lower ends of the grouting pipe 3 are both open. One end is rinsed with cleaning fluid to facilitate the flushing of the polyurethane in the grouting pipe 3 from the other end, thereby improving the cleaning efficiency of the grouting pipe 3. The polyurethane in the grouting pipe 3 can also flow out from the lower end of the grouting pipe 3 into the cracks, which can be used to fill the deep cracks with polyurethane.

[0042] A composite polymer-based grouting repair method, comprising the following steps:

[0043] Step 1: Place the base plate 1 above the crack, determine the placement position of the base plate 1 and the position of the grouting pipe 3 and mark them (drilling position A as shown in Figure 3), remove the base plate 1, and drill a hole at the marked position of the grouting pipe 3. The drill hole is on the crack so that the grouting pipe 3 can be inserted into the drill hole and is in the crack;

[0044] In addition, the positions of the two pressing plates 404 farthest from the grouting pipe 3 relative to the crack are also marked, and holes are drilled at the marked positions of the two pressing plates 404 (the drilling positions B1 and B2 as shown in FIG3 ). Longer blocking rods 12 are set in the through holes 11 on the two pressing plates 404. The blocking rods 12 can be inserted downward from the through holes 11 into the drilled holes, thereby blocking both sides of a section of the crack below the bottom plate 1 (the crack between the B1 and B2 drilled holes as shown in FIG3 ), preventing polyurethane from overflowing in the crack, and thus the crack directly below the bottom plate 1 (the crack between the B1 and B2 drilled holes as shown in FIG3 ) can be filled with polyurethane in a targeted manner.

[0045] Step 2: Put the bottom plate 1 back to the marked position, connect the grouting pipe 3 to the delivery pipe 501, and then insert the grouting pipe 3 into the drilled hole from the insertion hole 2 (drilling position A as shown in FIG3 ), and at the same time, move the slider 403 so that the pressing plate 404 is pressed against the mouth of the crack (as shown in FIG2 );

[0046] Step 3: Except for the two blocking rods 12 farthest from the grouting pipe 3, remove the other blocking rods 12 from the through hole 11, and use the through hole 11 to penetrate the polyurethane-filled crack;

[0047] Step 4: Use the slurry guide assembly 5 to inject the mixed polyurethane into the grouting pipe 3, so that the polyurethane in the grouting pipe 3 is injected into the crack, and observe whether polyurethane flows out from the through hole 11. When polyurethane appears in the through hole 11, use the blocking rod 12 to insert the through hole 11, indicating that the crack below the through hole 11 is filled with polyurethane. After all the through holes 11 are blocked by the blocking rod 12, stop injecting polyurethane into the crack;

[0048] Step 5: Remove the base plate 1 and wait for the polyurethane injected into the crack to foam and solidify, and the road crack repair is completed.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A grouting repair system based on a composite polymer, comprising a bottom plate (1), characterized in that: A central portion of the bottom plate (1) is provided with an insertion hole (2). A hollow grouting pipe (3) for injecting polyurethane into a road crack is inserted into the insertion hole (2). A plurality of liquid outlet holes (301) are evenly formed in a side wall of the grouting pipe (3). A sealing assembly (4) is further arranged on the bottom plate (1). The sealing assembly (4) includes a lifting frame (401) which is connected to the bottom plate (1) in a vertically sliding manner. A plurality of U-shaped support frames (402) are evenly arranged on the lifting frame (401). At least one slider (403) is slidably connected to each support frame (402). A pressing plate (404) capable of sealing an opening of the road crack is arranged below the slider (403). Side edges of adjacent pressing plates (404) are in contact with each other.

2. The grouting repair system based on composite polymer according to claim 1, characterized in that: Four corners of an upper surface of the bottom plate (1) are fixedly connected with guide posts (6). Four corners of the lifting frame (401) are slidably sleeved on the corresponding guide posts (6). A bracket (7) is fixedly connected to the bottom plate (1). An electric push rod (13) is fixedly installed on the bracket (7). An output shaft of the electric push rod (13) is connected to a side wall of the lifting frame (401).

3. The grouting repair system based on composite polymer according to claim 1, characterized in that: A connecting column (8) is fixedly connected to the pressing plate (404). The connecting column (8) is slidably sleeved on the slider (403). A spring (9) for pressing the pressing plate (404) is connected between the connecting column (8) and located between the slider (403) and the pressing plate (404). One end of the connecting column (8) far away from the pressing plate (404) is fixedly connected with a baffle (10).

4. The grouting repair system based on composite polymer according to claim 3, characterized in that: A through hole (11) penetrating up and down is formed in the pressing plate (404) and the connecting column (8). A plug rod (12) is movably inserted into the through hole (11).

5. The grouting repair system based on composite polymer according to claim 4, characterized in that: Each support frame (402) includes two cross bars (4021) and a fixing plate (4022). One ends of the two cross bars (4021) are connected through the fixing plate (4022). A first bolt (14) is arranged on a side wall of the fixing plate (4022). A threaded end of the first bolt (14) is meshed and connected to a side wall of the lifting frame (401).

6. The grouting repair system based on composite polymers according to claim 1, characterized in that: An upper end of the grouting pipe (3) is connected with a slurry guiding assembly (5) for injecting and guiding polyurethane into the grouting pipe (3). The slurry guiding assembly (5) includes a conveying pipe (501). The conveying pipe (501) is connected to the upper end of the grouting pipe (3). An inner cavity of the conveying pipe (501) is communicated with an inner cavity of the grouting pipe (3). A plurality of material pipes (502) are simultaneously communicated with an upper end of the conveying pipe (501). A mixing blade (503) for mixing isocyanate, polyether polyol and a catalyst is arranged inside the conveying pipe (501).

7. A grouting repair system based on a composite polymer according to claim 6, characterized in that: A lower end of the grouting pipe (3) is in an open shape.

8. The method of using the grouting repair system according to any one of claims 1-7, characterized in that: The grouting repair method based on a composite polymer includes the following steps: Step 1: Place the bottom plate (1) above the crack. After determining the placement position of the bottom plate (1) and the position of the grouting pipe (3) and marking them, remove the bottom plate (1). Drill a hole at the marked position of the grouting pipe (3). The drilling position is on the crack so that the grouting pipe (3) can be inserted into the drilled hole and be inside the crack. Step 2: Place the bottom plate (1) back to the marked position, connect the grouting pipe (3) to the delivery pipe (501), and then insert the grouting pipe (3) into the drilled hole from the insertion hole (2). At the same time, also move the slider (403) so that the pressing plate (404) presses against the mouth of the crack. Step 3: Remove the plug rod (12) from the through hole (11), and use the through hole (11) to fill the crack with polyurethane. Step 4: Use the grout guiding assembly (5) to inject the mixed polyurethane into the grouting pipe (3), causing the polyurethane in the grouting pipe (3) to be injected into the crack. Observe whether polyurethane gushes out inside the through hole (11). When polyurethane appears in the through hole (11), insert the plug rod (12) into this through hole (11), indicating that the crack below this through hole (11) has been filled with polyurethane. Wait until all the through holes (11) are blocked with the plug rod (12), and then stop injecting polyurethane into the crack. Step 5: Remove the bottom plate (1). After the polyurethane injected into the crack undergoes a foaming reaction and cures, the repair of the road surface crack is completed.

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