A device and method for repairing cracks in flood control road surfaces

Abstract

This invention belongs to the field of road surface repair technology, and provides a device and method for repairing cracks in flood control road surfaces. The device includes: a mixing section for producing filler material for crack repair; an extended injection tube, one end of which extends into the road surface crack; and an injection section located at the mixing section for injecting the filler material into the road surface crack. The injection section includes an injection main pipe and an injection propulsion component. The method includes: S1: probing the crack depth and cutting an extended injection tube of appropriate length; S2: obtaining the filler material; S3: installing the extended injection tube; S4: injecting the crack filler material; S5: rotating the sprayer; S6: electrofusion molding; and S7: attaching a mesh to the inner wall. In summary, this device and method for repairing cracks in flood control road surfaces can effectively solve the problem of cracks in flood control roads.

Description

Technical Field

[0001] This invention relates to the field of road surface repair technology, specifically to a device and method for repairing cracks in flood control road surfaces. Background Technology

[0002] Traditional methods of repairing road cracks involve reinforcing the surface with concrete. However, this method can only repair shallow cracks and cannot address deeper layers of the road surface. Meanwhile, since flood control roads are usually close to rivers and other areas prone to flooding, if the deeper layers of the road surface are not reinforced, the cracks in the road surface will be accelerated by the action of water, eventually leading to road collapse. Therefore, we propose a crack repair device and method for flood control roads, which can effectively solve the crack problem of flood control roads. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a device and method for repairing cracks in the pavement of flood control roads, so as to solve the problem of pavement cracks in flood control roads.

[0004] In a first aspect, the present invention provides a crack repair device for flood control road surfaces, comprising: a mixing section for producing a filler material for crack repair; the mixing section includes a mixing main box and a mixing component; the mixing component is rotatably installed inside the mixing main box; the mixing component includes two opposing spiral rotating shafts and two drive motors; wherein the drive motors are installed on the outer wall of the mixing main box and extend inward, and are drively connected to the spiral rotating shafts; the spiral rotating shafts are located inside the mixing main box; the spiral rotating shafts have spiral blades, wherein the spiral blades... The rotary blades are made of electrothermal material and are electrically connected to an external power source; an extended injection tube extends one end into the road surface crack; and an injection section is located at the mixing section and communicates with the main mixing tank; the injection section communicates with the other end of the extended injection tube and is used to inject filler material into the road surface crack; the injection section includes an injection main pipe and an injection propulsion component; the injection main pipe communicates with both the main mixing tank and the extended injection tube, and the injection propulsion component propels the filler material in the injection main pipe into the crack.

[0005] Furthermore, the main mixing chamber has a discharge port, which is located at the bottom center of the main mixing chamber and near the center of the two spiral rotating shafts; the injection section also includes an on / off valve, the main injection pipe is a three-way pipe, and one end of the main injection pipe is connected to the discharge port; the on / off valve is installed at the discharge port. In practical operation, this design is intended to facilitate the injection of filling material into the main injection pipe. In actual design, this structure is simple and easy to operate; at the same time, the on / off valve can also be assembled using existing components.

[0006] Furthermore, the injection propulsion component includes a propulsion cylinder and a propulsion piston; the propulsion cylinder is detachably mounted at the two-way port of the injection main pipe and extends into the injection main pipe; the propulsion piston is mounted on the output shaft of the propulsion cylinder; and the injection main pipe is also equipped with a pressure injection port. In practical applications, the purpose of this design is mainly to provide injection pressure for the filling material, facilitating its direct injection into the crack. The pressure injection port is also provided to prevent the injection propulsion component from being directly connected to an external pressure air source due to insufficient pressure. Of course, a sealing cap should be used for sealing during normal operation.

[0007] Furthermore, it also includes a reducing section, which is installed at the tee port of the injection main pipe; the reducing section includes a reducing valve, which is detachably installed on the injection main pipe. In practical applications, the purpose of this design is the same as described above: to achieve pressurization. By changing the gap at this point through the reducing valve, the pressure is adjusted. This method is simple and efficient, and the components are based on existing technology and are readily available.

[0008] Furthermore, it also includes a rotating part, which is installed and connected to the tee port of the main injection pipe. The rotating part includes an installation pipe, a fixing pipe, a rotating sleeve, and a motor. One end of the installation pipe is fixedly installed at the tee port of the main injection pipe, and one end of the rotating sleeve is rotatably installed at the other end of the installation pipe and sealed. One end of the fixing pipe is fixedly connected to the other end of the rotating sleeve. The rotating sleeve is provided with an external gear ring, which is located on the outer wall of the rotating sleeve. The motor is installed on the main injection pipe and drives the rotating sleeve to rotate through the meshing of the gear and the external gear ring. In practical applications, the purpose of this design is to realize the rotation of the extended injection assembly pipe. In this way, on the one hand, the crack filling material injected inside is guided and accelerated to be injected deeper into the crack, effectively increasing the injection depth; on the other hand, it also refers to the steel wire toilet plunger, utilizing its rotational characteristics to facilitate deeper injection of the extended injection assembly pipe.

[0009] Furthermore, the extended injection tube includes an outer sealing tube and an inner tube; the fixed tube is provided with an installation interface, wherein the installation interface has an outer interface and an inner interface; wherein one end of the outer sealing tube is installed on the outer interface, and one end of the inner tube is installed on the inner interface; wherein the other end of the outer sealing tube is sealed, and the outer wall is provided with multiple nozzles near the end face of the outer sealing tube. In practical application, the purpose of the double-pipe design is to inject crack-filling material from the bottom of the crack to the outside, changing the traditional injection direction. First, the crack-filling material enters through the inner pipe, and then extends upward through the nozzle of the outer sealing pipe. In this way, it can be discharged upward. Utilizing the gravity of the crack-filling material, the crack gaps are effectively filled. This working principle is similar to water, which is injected from bottom to top and continues to rise only after the space or gap below is filled. This greatly solves the problem of incomplete filling of small gaps in the crack, and under the continuous pressure of the injection section, it continues to rise. This forms a first wall with almost no gaps, with good sealing performance, which greatly avoids water seepage.

[0010] Furthermore, the outer sealing tube includes a rubber layer, an electrically conductive network, an upper electrofusion element, and an electrofusion end face mesh component; wherein the rubber layer respectively covers the upper electrofusion element, the electrically conductive network, and the electrofusion end face mesh component; wherein the upper electrofusion element, the electrically conductive network, and the electrofusion end face mesh component are respectively electrically connected to an external power source; the electrically conductive network, the upper electrofusion element, and the electrofusion end face mesh component are all made of electrothermal materials. In practical application, when the crack filling material is found to be emerging from the outer sealing tube, the upper electrofusion element inside the outer sealing tube is electrically heated to melt the nearby rubber, eventually forming a hole. In this way, the continuously injected crack filling material will gradually flow downward from the above-mentioned hole until it approaches the nozzle of the outer sealing tube; at this time, due to the pressure of the injection part and the downward flow pressure from the hole, a second wall with gaps is formed here. At this point, the electrified pipeline is energized to melt it, and the injection continues. This allows the crack-filling material to fill the original outer pipe wall as much as possible, and mixes with the molten rubber to increase the strength of the area. Furthermore, the electrified pipeline also forms a mesh-like process similar to wall construction, ensuring structural strength and facilitating effective connection and fixation with the first and second walls, reducing the likelihood of cracks at the connection points. This increases the actual service life of the repaired cracks. Finally, the electrofused end face mesh is energized to melt it; the inner tube is made of rubber. After the crack-filling material is injected, the inner tube is not removed. Utilizing the rubber properties of the inner tube, it becomes an internal pressure release point, absorbing material stress, liquid flow transmission pressure around the flood control road, and road surface pressure.

[0011] Furthermore, the extended injection tube also includes a supporting slide; the supporting slide is located between the outer sealing tube and the inner tube, close to the nozzle direction, and slides up and down on the outer wall of the inner tube. In practical applications, the main purpose of this design is to prevent the crack filler material flowing out from the holes from accumulating downwards; it also provides support.

[0012] As can be seen from the above technical solution, the beneficial effects of the flood control road surface crack repair device provided by the present invention are as follows: In practical applications, this design first uses the main box and agitator in the mixing section to mix the crack filling material, and simultaneously energizes the spiral blades to achieve heating; this effectively improves viscosity and ensures adhesion to the crack; at the same time, an extended injection tube is used to transport the crack filling material; and an injection section is used to effectively inject the crack filling material into the crack; the overall structure of this design is strong and its operation is simple.

[0013] Secondly, a method for repairing road surface cracks includes the following steps: Step 1: Inspect the crack depth. Obtain the crack depth using an external endoscope and cut an extension injection tube of the appropriate length. Step 2: Obtain the filling material. Place the preparation agent of the crack filling material into the mixing tank and start the motor to stir. Then, energize the spiral blades to heat the material. Step 3: Install the extension injection tube, connect one end of the extension injection tube to the main injection tube, and place the extension injection tube into the crack using the rotating part; Step 4: Inject crack filling material. First, open the on / off valve and let the crack filling material enter the injection main pipe. Then, close the on / off valve and inject the crack filling material into the extension injection assembly pipe through the push cylinder. Step 5: Rotate the spray nozzle, start the motor, and drive the extended injection tube to rotate, so as to spray the crack filling material out through the nozzle. Step 6: Electrofusion forging. First, energize the upper electrofusion component. When a notch is formed at the notch, de-energize it and observe the pressure of the extended injection tube. Then, energize the energized pipeline network and finally energize the electrofusion end face mesh component.

[0014] Step 7: Install mesh on the inner wall, and while energizing the power supply network, continuously inject crack filling material.

[0015] Furthermore, in step one, the length of the extended injection tube is at least 1.5 times the crack depth; in step five, when the propulsion cylinder cannot operate, it can be connected to an external pressure air source through the injection port. In practical applications, this method effectively ensures the injection depth of the extended injection tube and can also increase the high-pressure airflow through an external pressure air source to achieve high-pressure propulsion.

[0016] As can be seen from the above technical solution, the beneficial effects of the road surface crack repair method provided by the present invention are as follows: In practical applications, this method effectively fills cracks, enabling the repair of road surface cracks with high stress, force transmission, and vibration on flood control roads. It also allows for a repair and filling process from the inside out and from top to bottom, achieving a three-layer wall protection and an elastic pressure relief design for the inner pipe, effectively improving the actual service life of the repaired cracks. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the description of the specific embodiments or prior art will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a schematic diagram of the main structure of a flood control road surface crack repair device provided in an embodiment of the present invention; Figure 2 This is a partial structural diagram of the rotating part in a flood control road surface crack repair device; Figure 3 for Figure 2 The diagram shows a cross-sectional view of AA and a schematic diagram of its mounting interface; Figure 4 This is a schematic diagram of the working structure of the extended injection pipe in a flood control road surface crack repair device of the present invention at the crack. Figure 5 This is a three-dimensional structural diagram of the energized pipe network in the external sealing pipe of the present invention; Figure 6 This is a three-dimensional structural diagram of the upper electrofusion element in the outer sealing tube of the present invention; Figure 7 This is a three-dimensional structural diagram of the electrofusion end face mesh component in the external sealing tube of the present invention; Figure 8 This is a schematic diagram of the flow of the crack-filling material in the extended injection tube in this invention and an explanatory diagram of step 6. Figure 9 This is a schematic diagram illustrating the workflow of a road surface crack repair method according to the present invention.

[0019] Figure label: Mixing section 1, mixing main box 11, discharge port 111, mixing component 12, spiral rotating shaft 121, drive motor 122, spiral blade 1211, extended injection assembly pipe 2, outer sealing pipe 21, rubber layer 211, power supply network 212, upper electrofusion component 213, electrofusion end face mesh component 214, nozzle 215, inner pipe 22, support slide 23, injection section 3, injection main pipe 31, spray pressure interface 311, injection propulsion component 32, propulsion cylinder 321, propulsion piston 322, opening and closing valve 33, diameter changing section 4, diameter changing valve 41, rotating section 5, mounting pipe 51, fixing pipe 52, mounting interface 521, outer interface 5211, inner interface 5212, rotating outer sleeve 53, outer gear ring 531, motor 54. Detailed Implementation

[0020] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0021] The basic implementation examples are as follows: Figures 1 to 9 As shown: like Figure 1 - Figure 8 As shown in the figure, this embodiment provides a device and method for repairing cracks in flood control road surfaces, which can solve the problem of road surface cracks in flood control roads.

[0022] In a first aspect, the present invention provides a crack repair device for flood control road surfaces, comprising: a mixing section 1, the mixing section 1 being used to produce a filler material for crack repair; the mixing section 1 including a main mixing chamber 11 and a mixing component 12; the mixing component 12 being rotatably installed inside the main mixing chamber 11; the mixing component 12 including two opposing spiral rotating shafts 121 and two drive motors 122; wherein the drive motors 122 are installed on the outer wall of the main mixing chamber 11 and extend inward, and are drively connected to the spiral rotating shafts 121; the spiral rotating shafts 121 are located inside the main mixing chamber 11; the spiral rotating shafts 121 have spiral blades 121. 1. The spiral blade 1211 is made of an electrothermal material and is electrically connected to an external power source; an extended injection tube 2, one end of which can extend into the road surface crack; and an injection section 3, which is located at the mixing section 1 and communicates with the mixing main box 11; the injection section 3 communicates with the other end of the extended injection tube 2; and is used to inject filling material into the road surface crack; the injection section 3 includes an injection main pipe 31 and an injection propulsion component 32; the injection main pipe 31 communicates with the mixing main box 11 and the extended injection tube 2 respectively, and the injection propulsion component 32 is used to propel the filling material in the injection main pipe 31 into the crack. In practical applications, this design first uses the main box and agitator 12 in the mixing section 1 to mix the crack filling material, and simultaneously energizes the spiral blades 1211 to achieve heating; this can effectively improve viscosity and ensure adhesion to the crack; at the same time, the extended injection tube 2 is used to transport the crack filling material; and the injection section 3 is used to effectively inject the crack filling material into the crack; the overall structure of this design is strong and its operation is simple.

[0023] In this embodiment, to facilitate the conveying of crack filling material, the mixing main tank 11 has a discharge port 111, which is located at the bottom center of the mixing main tank 11 and near the center of the two spiral rotating shafts 121. The injection section 3 also includes an on / off valve 33. The injection main pipe 31 is a three-way pipe, and one end of the injection main pipe 31 is connected to the discharge port 111. The on / off valve 33 is installed at the discharge port 111. In actual operation, this design is to facilitate the injection of filling material into the injection main pipe 31. In actual design, this structure is simple and easy to operate. At the same time, the on / off valve 33 can also be assembled using existing accessories.

[0024] In this embodiment, to achieve pressurized feeding, the injection propulsion component 32 includes a propulsion cylinder 321 and a propulsion piston 322. The propulsion cylinder 321 is detachably installed at the two-way port of the injection main pipe 31 and extends into the injection main pipe 31. The propulsion piston 322 is installed on the output shaft of the propulsion cylinder 321. The injection main pipe 31 is also provided with a pressure injection port 311. In practical applications, the purpose of this design is mainly to provide injection pressure for the filling material, facilitating its direct injection into the crack. The pressure injection port 311 is also provided to prevent the injection propulsion component 32 from having insufficient pressure and to directly connect to an external pressure air source. Of course, a sealing cap should be provided for sealing during normal operation.

[0025] To further achieve pressurization, this embodiment also includes a reducing section 4, which is installed at the tee port of the injection main pipe 31. The reducing section 4 includes a reducing valve 41, which is detachably installed on the injection main pipe 31. In practical applications, the purpose of this design is the same as described above: to achieve pressurization. The pressure is adjusted by changing the gap at this point through the reducing valve 41. This method is simple, efficient, and the components are based on existing technology and are readily available.

[0026] In this embodiment, to facilitate the extension of the injection tube 2 into the crack, a rotating part 5 is also included. The rotating part 5 is installed at the tee port of the injection main tube 31 and connected to the tee port. The rotating part 5 includes an installation tube 51, a fixing tube 52, a rotating sleeve 53, and a motor 122. One end of the installation tube 51 is fixedly installed at the tee port of the injection main tube 31, and one end of the rotating sleeve 53 is rotatably installed at the other end of the installation tube 51 and sealed. One end of the fixing tube 52 is fixedly connected to the other end of the rotating sleeve 53. The rotating sleeve 53 is provided with an external gear ring 531, wherein the external gear ring 531 is located on the outer wall of the rotating sleeve 53. The motor 122 is installed on the injection main tube 31 and drives the rotating sleeve 53 to rotate through the meshing of the gear and the external gear ring 531. In practical applications, the purpose of this design is to enable the extension injection tube 2 to rotate. This will, on the one hand, guide the crack filling material injected inside, accelerate its injection into the crack, and effectively increase the injection depth; on the other hand, it also references the steel wire toilet plunger, utilizing its rotational characteristics to facilitate deeper injection into the extension injection tube 2.

[0027] In this embodiment, the extended injection tube 2 includes an outer sealing tube 21 and an inner tube 22; the fixed tube 52 is provided with an installation interface 521, wherein the installation interface 521 is provided with an outer interface 5211 and an inner interface 5212; wherein one end of the outer sealing tube 21 is installed on the outer interface 5211, and one end of the inner tube 22 is installed on the inner interface 5212; wherein the other end of the outer sealing tube 21 is sealed, and the outer wall is provided with multiple nozzles 215, which are located near the end face of the outer sealing tube 21. In practical application, the purpose of the double-pipe design is to allow the crack-filling material to be injected from the bottom of the crack to the outside, changing the traditional injection direction. First, the crack-filling material enters through the inner pipe 22, and then extends upward through the nozzle 215 of the outer sealing pipe 21. In this way, it can be discharged upward. The gravity of the crack-filling material effectively fills the crack gaps. This working principle is similar to water, which is injected from bottom to top and continues to rise only after the space or gap below is filled. This greatly solves the problem of incomplete filling of small gaps in the crack, and under the continuous pressure of the injection section 3, it continues to rise. This forms a first wall with almost no gaps, with good sealing performance, which greatly avoids water seepage.

[0028] In this embodiment, the outer sealing tube 21 includes a rubber layer 211, an electrified pipe network 212, an upper electrofusion element 213, and an electrofusion end face mesh 214; wherein the rubber layer 211 covers the upper electrofusion element 213, the electrified pipe network 212, and the electrofusion end face mesh 214 respectively; wherein the upper electrofusion element 213, the electrified pipe network 212, and the electrofusion end face mesh 214 are electrically connected to an external power source; the electrified pipe network 212, the upper electrofusion element 213, and the electrofusion end face mesh 214 are all made of electrothermal materials. In practical application, when the crack filling material is found to be emerging from the outer sealing tube 21, the upper electrofusion element 213 inside the outer sealing tube 21 is energized and heated to melt the nearby rubber, eventually forming a hole. The continuously injected crack filling material then gradually flows downwards through this hole until it approaches the nozzle 215 of the outer sealing tube 21. At this point, due to the pressure from the injection section 3 and the downward pressure from the hole, a second wall with gaps is formed. Then, the energized pipe network 212 is energized to melt it, while the injection continues. This ensures that the crack filling material fills as much of the original outer sealing tube 21 wall as possible, mixing with the molten rubber to increase the strength of that area. Furthermore, the energized pipe network 212 also forms a mesh-like process similar to wall construction, ensuring structural strength and facilitating effective connection and fixation with the second and first walls. This prevents cracks from forming at the connection points, thus increasing the service life after crack repair. Finally, the electrofusion end face mesh 214 is fused by electricity; the inner tube 22 is made of rubber; after the crack filling material is injected, the inner tube 22 is not removed. Taking advantage of the rubber properties of the inner tube 22, it becomes an internal pressure release point. This pressure includes material stress, liquid flow transmission pressure around the flood control road, and road surface pressure.

[0029] In this embodiment, the extended injection tube 2 further includes a supporting slide 23; the supporting slide 23 is located between the outer sealing tube 21 and the inner tube 22, close to the nozzle 215, and slides up and down on the outer wall of the inner tube 22. In practical applications, the main purpose of this design is to prevent the crack filling material flowing out of the holes from accumulating downwards; it also serves a supporting function.

[0030] Secondly, such as Figure 9 As shown, a method for repairing road surface cracks includes the following steps: Step 1: Inspect the crack depth. Obtain the crack depth using an external endoscope and cut the corresponding length of the extended injection tube 2. Step 2: Obtain the filling material. Place the preparation agent of the crack filling material into the mixing tank 11, start the motor 122 to stir, and then energize the spiral blades 1211 to heat the material. Step 3: Install the extension injection tube 2, connect one end of the extension injection tube 2 to the injection main tube 31, and place the extension injection tube 2 into the crack through the rotating part 5; Step 4: Inject crack filling material. First, open the on / off valve 33 to let the crack filling material enter the injection main pipe 31. Then, close the on / off valve 33 and inject the crack filling material into the extension injection assembly pipe 2 through the push cylinder 321. Step 5: Rotate the spray nozzle, start the motor 122, drive the extended injection tube 2 to rotate, and spray the crack filling material through the nozzle 215. Step 6: Electrofusion forging. First, energize the upper electrofusion component 213. After a notch is formed there, de-energize it and observe the pressure of the extension injection tube 2. Then, energize the energized pipeline 212 and finally energize the electrofusion end face mesh component 214.

[0031] Step 7: Install mesh on the inner wall, and while energizing the power supply network 212, continuously inject crack filling material.

[0032] In practical applications, this method effectively ensures the injection depth of the extended injection tube 2 and can increase the high-pressure airflow through an external pressure air source to achieve high-pressure propulsion. In practical applications, this method effectively fills cracks, enabling the effective repair of road surface cracks with high stress, force transmission, and vibration on flood control roads. It allows for a repair and filling process from the inside out and then from top to bottom, achieving three layers of wall protection and an elastic pressure relief design for the inner tube 22, effectively improving the actual service life of the repaired cracks.

[0033] In this embodiment, in step one, the length of the extended injection tube 2 is cut to be at least 1.5 times the crack depth; in step five, when the propulsion cylinder 321 cannot work, it can be connected to an external pressure air source through the injection port 311.

[0034] In summary, the proposed flood control road surface crack repair device and method are not only rationally designed but also simple to operate. They allow for easy injection of crack filling material from the inside out and from top to bottom into the cracks, achieving a triple-wall structure and solving the pressure relief problem. This effectively improves the actual service life of flood control road surfaces and is therefore suitable for industry promotion.

[0035] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for repairing cracks in flood control road surfaces, characterized in that, include: The mixing section is used to produce filler material for crack repair; the mixing section includes a main mixing tank and a mixing component; the mixing component is rotatably installed inside the main mixing tank; The stirring component includes two opposing spiral rotating shafts and two drive motors; wherein the drive motors are mounted on the outer wall of the main stirring box and extend inward, and are connected to the spiral rotating shafts in a transmission manner; the spiral rotating shafts are located inside the main stirring box; the spiral rotating shafts have spiral blades, wherein the spiral blades are made of electrothermal material and are electrically connected to an external power source; The mixing main box has a discharge port, which is located at the bottom center of the mixing main box and close to the center of the two spiral rotation shafts. An extended injection tube, one end of which can extend into a road surface crack; and An injection section is provided at the mixing section and communicates with the main mixing tank; the injection section communicates with the other end of the extended injection assembly pipe; and is used to inject filler material into the road surface cracks; the injection section includes an injection main pipe and an injection propulsion component; the injection main pipe communicates with both the main mixing tank and the extended injection assembly pipe, and the injection propulsion component is used to propel the filler material in the injection main pipe into the cracks; The injection section also includes an on / off valve; the main injection pipe is a three-way pipe, and one of the ports of the main injection pipe is connected to the discharge port; the on / off valve is installed at the discharge port. The injection propulsion component includes a propulsion cylinder and a propulsion piston; the propulsion cylinder is detachably mounted at the two-way port of the injection main pipe and extends into the injection main pipe; the propulsion piston is mounted on the output shaft of the propulsion cylinder; wherein the injection main pipe is also provided with a pressure injection port; It also includes a reducing section, which is installed at the tee port of the injection main pipe; the reducing section includes a reducing valve, which is detachably installed on the injection main pipe; It also includes a rotating part, which is installed and connected to the tee port of the injection main pipe; the rotating part includes an installation pipe, a fixing pipe, a rotating sleeve, and a motor; one end of the installation pipe is fixedly installed at the tee port of the injection main pipe, and one end of the rotating sleeve is rotatably installed at the other end of the installation pipe and sealed; one end of the fixing pipe is fixedly connected to the other end of the rotating sleeve, and the rotating sleeve is provided with an external gear ring, wherein the external gear ring is located on the outer wall of the rotating sleeve; the motor is installed on the injection main pipe and drives the rotating sleeve to rotate through the meshing of the gear and the external gear ring; The extended injection tube assembly includes an outer sealing tube and an inner tube; the fixed tube is provided with an installation interface, wherein the installation interface has an outer interface and an inner interface; wherein one end of the outer sealing tube is installed on the outer interface, and one end of the inner tube is installed on the inner interface; wherein the other end of the outer sealing tube is sealed, and the outer wall is provided with multiple nozzles near the end face of the outer sealing tube. The outer sealing tube includes a rubber layer, an electrified pipe network, an upper electrofusion element, and an electrofusion end face mesh; wherein the rubber layer covers the upper electrofusion element, the electrified pipe network, and the electrofusion end face mesh respectively; wherein the upper electrofusion element, the electrified pipe network, and the electrofusion end face mesh are electrically connected to an external power source; the electrified pipe network, the upper electrofusion element, and the electrofusion end face mesh are all made of electrothermal materials.

2. The flood control road surface crack repair device according to claim 1, characterized in that, The extended injection tube also includes a support slide; the support slide is located between the outer sealing tube and the inner tube, close to the nozzle direction, and slides up and down on the outer wall of the inner tube.

3. A method for repairing road surface cracks, characterized in that, The flood control road surface crack repair device according to any one of claims 1-2 includes the following steps: Step 1: Inspect the crack depth. Obtain the crack depth using an external endoscope and cut an extension injection tube of the appropriate length. Step 2: Obtain the filling material. Place the preparation agent of the crack filling material into the mixing tank and start the motor to stir. Then, energize the spiral blades to heat the material. Step 3: Install the extension injection tube. Connect one end of the extension injection tube to the main injection tube, and place the extension injection tube into the crack using the rotating part. Step 4: Inject crack filling material. First, open the on / off valve and let the crack filling material enter the injection main pipe. Then, close the on / off valve and inject the crack filling material into the extension injection assembly pipe through the push cylinder. Step 5: Rotate the spray nozzle, start the motor, and drive the extended injection tube to rotate, so that the material filling the crack is sprayed out through the nozzle. Step Six: Electrofusion Outlet Creation. First, energize the upper electrofusion component. When a notch is formed at the notch, de-energize it and observe the pressure of the extended injection tube. Then, energize the energized pipeline network and finally energize the electrofusion end face mesh component. Step 7: Hang mesh on the inner wall, and while energizing the power supply network, continuously inject crack filling material; In step one, the length of the extended injection tube is at least 1.5 times the crack depth; in step five, when the propulsion cylinder cannot work, it can be connected to an external pressure air source through the injection port.

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