An asphalt pavement crack repair apparatus and method

Abstract

The present application relates to the technical field of asphalt pavement repairing, and discloses an asphalt pavement crack repairing device and a method thereof, wherein the asphalt pavement crack repairing device comprises a cart and a storage cylinder in the cart, and the inner side of the cart is additionally provided with a transverse moving structure, the transverse moving structure comprises a sliding groove, a sliding rail, a sliding plate and a connecting inner groove, the lower end of the cart is provided with the sliding groove, the inner side of the sliding groove is symmetrically provided with the sliding rail, the upper end of the sliding rail is slidably connected with the sliding plate, and the inner side of the sliding plate is provided with the connecting inner groove. The polishing effect on the inner wall of the crack makes the asphalt more closely adhere to the inner wall of the crack during pouring, the adhesion effect is more firm, the adhesion of dust to the inner wall of the crack is avoided, the filling effect of the crack is affected, the conical groove design at the top end of the crack can avoid the overflow of the asphalt, the scattering of the asphalt is avoided, the pouring of the asphalt is more uniform, and the external equipment is not needed to scrape off the excess asphalt at the top end of the crack.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of asphalt pavement repair, in particular to a crack repair device for asphalt pavement and a method thereof. BACKGROUND

[0002] The asphalt pavement pit is a pit formed by the local falling of road materials under the action of driving, and the asphalt pavement pit has a forming process. Initially, the local cracks are loose, and the pit is gradually formed under the action of driving load and rainwater and other natural factors. The municipal road department needs to repair it to avoid affecting the operation of vehicles. The asphalt pavement refers to various types of pavements made of road asphalt materials mixed with mineral materials. The asphalt binder improves the ability of the paving granules to resist the damage of driving and natural factors to the pavement, so that the pavement is flat, less dusty, water-resistant and durable. Therefore, the asphalt pavement is a high-grade pavement most widely used in road construction.

[0003] However, the existing asphalt crack repair device usually directly fills the asphalt material in the gap, and the asphalt automatically extends to the deep part of the gap through the flow effect of the asphalt. When the inner wall of the pavement gap is washed by water flow or covered by dust, the adhesion effect is not strong during the asphalt filling, which affects the use after the repair. Therefore, it does not meet the existing needs, and thus we propose a crack repair device for asphalt pavement and a method thereof. SUMMARY

[0004] The present application provides a crack repair device for asphalt pavement and a method thereof, which has the beneficial effect of polishing the inner wall of the crack and improving the adhesion degree, and solves the problem of the existing asphalt crack repair device mentioned in the background technology, which usually directly fills the asphalt material in the gap, and the asphalt automatically extends to the deep part of the gap through the flow effect of the asphalt. When the inner wall of the pavement gap is washed by water flow or covered by dust, the adhesion effect is not strong during the asphalt filling, which affects the use after the repair.

[0005] The present application provides the following technical scheme: a crack repair device for asphalt pavement and a method thereof, wherein the crack repair device for asphalt pavement comprises a cart and a storage cylinder in the cart, the inner side of the cart is further provided with a transverse moving structure, the transverse moving structure comprises a sliding groove, a sliding rail, a sliding plate and a connecting inner groove, the lower end of the cart is provided with the sliding groove, the sliding groove is symmetrically provided with the sliding rail inside, the upper end of the sliding rail is slidably connected with the sliding plate, the inner side of the sliding plate is provided with the connecting inner groove, the lower end of the sliding plate is provided with a polishing structure, the polishing structure comprises a rotating shaft and a cutting blade, the outer side of the rotating shaft is provided with the cutting blade, and the rotating shaft is used for rotating connection in the inside of the connecting inner groove.

[0006] As an optional scheme of the asphalt pavement crack repairing equipment, the grinding structure further comprises a cutting bottom end, a fixed end and an inclined side, the bottom end of the rotating shaft is provided with the cutting bottom end, the outer side section of the cutting piece is in an inclined structure, and the inclined structure is the inclined side.

[0007] As an optional scheme of the asphalt pavement crack repairing equipment, the inside of the connecting inner groove is further rotationally connected with a power support structure, the inner side of the power support structure is vertically fixed with a transition structure, the power support structure is used for installing the transition structure in the connecting inner groove, and the rotating shaft is used for being installed at the bottom end of the transition structure.

[0008] As an optional scheme of the asphalt pavement crack repairing equipment, the power support structure comprises a driving ring, a support bearing, a driving gear and a matching vertical groove, the inner wall of the driving ring is in an annular array and is provided with the matching vertical groove, the outer side of the driving ring is installed with the support bearing, and the support bearing is used for supporting the driving ring to rotate in the connecting inner groove.

[0009] As an optional scheme of the asphalt pavement crack repairing equipment, the transition structure comprises a transition pipeline, a fixed sleeve, a threaded frame, a limiting inner groove and a plug-in pin, the lower end of the transition pipeline is provided with the fixed sleeve, the inside of the transition pipeline is fixedly installed with the threaded frame, the threaded frame is in a coaxial state with the transition pipeline, the top end of the transition pipeline is in an annular array and is provided with the plug-in pin, the plug-in pin is used for vertically plugging the transition pipeline in the matching vertical groove, and the inner wall of the transition pipeline is further provided with the limiting inner groove.

[0010] As an optional scheme of the asphalt pavement crack repairing equipment, the inside of the transition pipeline is further installed with a feeding structure, the feeding structure comprises a conveying pipeline and an extension end, the conveying pipeline is used for being installed at the bottom end of the limiting inner groove, the lower end of the conveying pipeline is provided with the extension end, and the bottom end of the extension end is plugged in the inner wall of the transition pipeline.

[0011] As an optional scheme of the asphalt pavement crack repairing equipment, the lower end of the rotating shaft is provided with the cutting bottom end, the inside of the cutting bottom end is in a cavity state, the outer side of the fixed sleeve is installed with a fixed ring, the inner wall of the transition pipeline is further provided with a matching inner groove, the fixed end is used for being attached to the inner wall of the matching inner groove, the fixed ring is used for tightening the lower end of the fixed sleeve, the upper end of the trolley is further installed with a driving motor, and the driving motor is used for being meshingly connected with the tooth groove of the driving gear.

[0012] As an optional scheme of the asphalt pavement crack repairing device, the outer side of the conveying pipeline is symmetrically provided with a supporting side rod, the top end of the supporting side rod is provided with a pull rod, the top end of the conveying pipeline is provided with a connecting pipe, and the other end of the connecting pipe is connected with the storage cylinder.

[0013] As an optional scheme of the asphalt pavement crack repairing device, the outer side of the conveying pipeline is symmetrically provided with a supporting side rod, the top end of the supporting side rod is provided with a pull rod, the top end of the conveying pipeline is provided with a connecting pipe, and the other end of the connecting pipe is connected with the storage cylinder.

[0014] As an optional scheme of the asphalt pavement crack repairing device, the outer side of the conveying pipeline is symmetrically provided with a supporting side rod, the top end of the supporting side rod is provided with a pull rod, the top end of the conveying pipeline is provided with a connecting pipe, and the other end of the connecting pipe is connected with the storage cylinder.

[0015] S1, aligning and installing: the trolley is placed above the crack, the rotating shaft is clamped in the fixed sleeve, the insertion pin is inserted into the matching vertical groove, the bottom end of the rotating shaft is inserted into the crack, the driving motor is engaged with the driving gear to form driving force, and the rotating power support of the driving ring is completed.

[0016] S2, polishing the inner wall of the crack: the rotating shaft is rotated to polish the inner wall of the crack, the operator pushes the trolley to move, the rotating shaft moves along the crack, and the inner wall of the crack is polished to increase the adhesion of asphalt and crack and avoid crack.

[0017] S3, adhesion: the rotating shaft polishes the top end of the crack to form a conical cross-section groove, the overflowed asphalt is accumulated in the groove after the crack is filled with asphalt, and the adhesion area and the support area of the asphalt are increased.

[0018] S4, filling: the rotating shaft fills the crack from the bottom, which can prevent the generation of air bubbles and make the asphalt adhere to the inner wall more closely.

[0019] The present application has the following advantages:

[0020] 1. The asphalt pavement crack repairing equipment, through the polishing effect of the inner wall of the crack, the adhesion of the asphalt to the inner wall of the crack is more close and the adhesion effect is more solid when pouring, the influence of the filling effect of the crack caused by the adhesion of dust to the inner wall of the crack is avoided, and the conical groove design at the top end of the crack can avoid the overflow of the asphalt, cause the scattering, and make the asphalt more uniform when pouring, without external equipment, the excess asphalt at the top end of the gap is scraped.

[0021] 2. The asphalt pavement crack repairing equipment, through the cooperation of the power support structure and the transition structure, the rotating shaft has the conveying function of the asphalt while polishing the inside of the crack, the rotating shaft directly fills the bottom end of the crack while polishing, through the operation step of filling from bottom to top, the gas remaining in the crack can be greatly reduced, the close effect of the asphalt filling is further increased, so that the polishing and filling operations of the asphalt are carried out at the same time, and the working efficiency of the device is greatly improved.

[0022] 3. The asphalt pavement crack repairing equipment, through the lifting function of the lifting rod to the whole conveying pipeline, the rotating shaft is lifted to make the plug-in pin separate from the inside of the transition pipeline, the rotating shaft can be directly pulled out of the driving ring, and the power output state is separated, this state can greatly realize the supporting and installation effect of the device, so that the device can be directly pulled out after polishing, and the rotating shaft can be pulled out in time after the crack is filled, so as to avoid affecting the movement of the cart. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the overall structure diagram of the present application.

[0024] Figure 2 It is the overall top view diagram of the present application.

[0025] Figure 3 It is the polishing structure diagram of the present application.

[0026] Figure 4 It is the connection diagram of the horizontal moving structure, polishing structure and power support structure of the present application.

[0027] Figure 5 It is the working section diagram of the polishing structure of the present application.

[0028] Figure 6 It is the rotating sealing structure diagram of the present application.

[0029] In the figure: 1, the trolley; 2, the transverse structure; 21, the sliding groove; 22, the sliding rail; 23, the sliding plate; 24, the connecting inner groove; 3, the polishing structure; 31, the rotating shaft; 32, the cutting blade; 33, the cutting bottom end; 34, the fixed end; 35, the inclined side; 4, the power support structure; 41, the driving ring; 42, the support bearing; 43, the driving gear; 44, the matching vertical groove; 5, the transition structure; 51, the transition pipeline; 52, the fixed sleeve; 53, the threaded frame; 54, the limiting inner groove; 55, the plug-in pin; 56, the matching inner groove; 6, the feeding structure; 61, the conveying pipeline; 62, the extension end; 63, the support side rod; 64, the pull rod; 7, the rotating sealing structure; 71, the inner ring; 72, the outer ring; 73, the support ball; 74, the first limiting ring; 75, the second limiting ring; 8, the fixed ring; 9, the connecting pipe; 10, the storage cylinder; 11, the driving motor. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0031] Embodiment 1

[0032] Please refer to Figures 1-6 , and discloses a crack repairing device for asphalt pavement, which comprises a trolley 1 and a storage cylinder 10 in the trolley 1. The inner side of the trolley 1 is further provided with a transverse structure 2, which comprises a sliding groove 21, a sliding rail 22, a sliding plate 23 and a connecting inner groove 24. The lower end of the trolley 1 is provided with the sliding groove 21, and the inside of the sliding groove 21 is symmetrically provided with the sliding rail 22. The upper end of the sliding rail 22 is slidingly connected with the sliding plate 23, and the inner side of the sliding plate 23 is provided with the connecting inner groove 24. The lower end of the sliding plate 23 is provided with a polishing structure 3, which comprises a rotating shaft 31 and a cutting blade 32. The outer side of the rotating shaft 31 is provided with the cutting blade 32, and the rotating shaft 31 is used for rotating connection in the inside of the connecting inner groove 24.

[0033] The polishing structure 3 further comprises a cutting bottom end 33, a fixed end 34 and an inclined side 35. The bottom end of the rotating shaft 31 is provided with the cutting bottom end 33. The outer side cross section of the cutting blade 32 is in an inclined structure, which is the inclined side 35.

[0034] The trolley 1 is placed above the road crack, the rotating shaft 31 extends into the crack, the cutting blade 32 is used for grinding the inner wall of the crack and removing the dust or other substances attached to the inner wall of the crack through the rotation of the rotating shaft 31, at this time, the trolley 1 can be moved forward by the operator, the sliding plate 23 is transversely slidably connected with the sliding groove 21 and supports the rotation of the rotating shaft 31, the rotating shaft 31 is automatically moved transversely along with the position of the crack while the whole rotating shaft 31 advances, when the rotating shaft 31 cuts the two sides of the crack, the two sides of the crack will form a certain resistance to the rotating shaft 31, the resistance can keep the rotating shaft 31 in the central position of the crack, thereby realizing the automatic alignment function of the rotating shaft 31 during cutting and avoiding the loose structure of the inner wall of the crack when the crack is opened, which reduces the adhesion degree of the asphalt filling.

[0035] The cutting blade 32 has a conical cross section, which can polish the top end of the crack into a conical groove, thereby avoiding the overflow of the asphalt during filling, causing the asphalt to be scattered, and making the asphalt more uniform during pouring without the need for external equipment to remove the excess asphalt at the top end of the crack.

[0036] Embodiment 2

[0037] This embodiment is an improvement based on embodiment 1, for details, please refer to Figures 1-6 The inner side of the power support structure 4 is vertically fixed with a transition structure 5, the power support structure 4 is used for installing the transition structure 5 in the connecting inner groove 24, and the rotating shaft 31 is used for installing at the bottom end of the transition structure 5;

[0038] The power support structure 4 includes a driving ring 41, a support bearing 42, a driving gear 43 and a matching vertical groove 44, the inner wall of the driving ring 41 is annularly arrayed with the matching vertical groove 44, the outer side of the driving ring 41 is installed with the support bearing 42, and the support bearing 42 is used for supporting the driving ring 41 to rotate in the connecting inner groove 24;

[0039] The transition structure 5 includes a transition pipe 51, a fixed sleeve 52, a threaded frame 53, a limiting inner groove 54 and a plug-in pin 55, the lower end of the transition pipe 51 is provided with the fixed sleeve 52, the inside of the transition pipe 51 is fixedly installed with the threaded frame 53, the threaded frame 53 is coaxial with the transition pipe 51, the top end of the transition pipe 51 is annularly arrayed with the plug-in pin 55, the plug-in pin 55 is used for vertically inserting the transition pipe 51 into the matching vertical groove 44, and the inner wall of the transition pipe 51 is further provided with the limiting inner groove 54;

[0040] The inside of the transition pipe 51 is also provided with a feeding structure 6, which comprises a conveying pipe 61 and an extension end 62. The conveying pipe 61 is arranged at the bottom end of the limiting inner groove 54, and the lower end of the conveying pipe 61 is provided with the extension end 62, and the bottom end of the extension end 62 is inserted into the inner wall of the transition pipe 51.

[0041] The lower end of the rotating shaft 31 is provided with a cutting bottom end 33, which is in a hollow state. The outer side of the fixing sleeve 52 is provided with a fixing ring 8, and the inner wall of the transition pipe 51 is also provided with a matching inner groove 56. The fixing end 34 is used to fit the inner wall of the matching inner groove 56, and the fixing ring 8 is used to tighten the lower end of the fixing sleeve 52. The upper end of the trolley 1 is also provided with a driving motor 11, which is used to be connected with the driving gear 43.

[0042] When pouring asphalt, cracks are usually poured from top to bottom, but this operation is easy to cause the formation of air cavity in the asphalt, which leads to incomplete adhesion of the asphalt and affects the repair quality.

[0043] The top end of the rotating shaft 31 is used to be fixed in the inside of the fixing sleeve 52, and the outer side of the fixing sleeve 52 is tightened by the fixing ring 8 to complete the fixing operation of the rotating shaft 31. The top end of the transition pipe 51 is inserted into the inside of the matching vertical groove 44, and the driving ring 41 is driven to rotate by the driving motor 11, which drives the whole transition pipe 51 to rotate, and the transition pipe 51 rotates at the same time to drive the rotating shaft 31 to rotate, so as to cut the cracks.

[0044] The asphalt is conveyed into the inside of the transition pipe 51 through the conveying pipe 61, and the conveying pipe 61 is connected with the storage cylinder 10 through the connecting pipe 9. The connecting pipe 9 has a certain supporting effect, so that the transition pipe 51 and the conveying pipe 61 form relative motion. When moving, the transition pipe 51 drives the screw frame 53 to rotate, and the asphalt material in the conveying pipe 61 is rolled and driven. The inside of the rotating shaft 31 is hollow, which can convey the asphalt to the bottom of the crack through the rotating shaft 31 to directly fill the bottom.

[0045] Embodiment 3

[0046] This embodiment is improved on the basis of embodiment 2. For details, please refer to Figures 1-6 The outer side of the conveying pipe 61 is symmetrically provided with a supporting side rod 63, and the top end of the supporting side rod 63 is provided with a lifting rod 64. The top end of the conveying pipe 61 is provided with a connecting pipe 9, and the other end of the connecting pipe 9 is connected with the storage cylinder 10.

[0047] The outer side of the conveying pipe 61 is provided with a rotating sealing structure 7 for rotatingly mounting the conveying pipe 61 inside the transition pipe 51, the rotating sealing structure 7 comprises an inner ring 71, an outer ring 72, supporting balls 73, a first limiting ring 74 and a second limiting ring 75, the outer ring 72 is provided with the inner ring 71 on the outer side, the supporting balls 73 are arranged between the inner ring 71 and the outer ring 72 for supporting the rotating connection of the inner ring 71 and the outer ring 72, the outer surface of the outer ring 72 is provided with the second limiting ring 75, the inner wall of the inner ring 71 is provided with the first limiting ring 74, the first limiting ring 74 and the second limiting ring 75 are in an interlaced overlapping state, and a gap is arranged between the inner ring 71 and the outer ring 72, and the gap is zero point three millimeters.

[0048] After polishing the inner wall of the crack, the rotating shaft 31 needs to have a dismounting function to ensure that it can be directly pulled out of the inside of the crack after polishing, so as to avoid affecting the movement of the trolley 1.

[0049] The conveying pipe 61 can be directly pulled as a whole by pulling the pull rod 64, and the conveying pipe 61 is supported and limited by the inner wall of the transition pipe 51 through the clamping of the rotating sealing structure 7 in the limiting inner groove 54, and the transition pipe 51 is vertically inserted in the matching vertical groove 44 through the insertion pin 55, so that the insertion pin 55 can be directly pulled out of the driving ring 41 and separated from the power output state after being separated from the inside of the transition pipe 51, which can greatly realize the supporting and mounting effect of the device, so that the device can be directly pulled out after polishing.

[0050] The inner ring 71 is attached to the inner wall of the transition pipe 51, and the outer ring 72 is attached to the outer surface of the conveying pipe 61, so that the inner ring 71 and the outer ring 72 form relative motion and are supported by the supporting balls 73, and the gap between the inner ring 71 and the outer ring 72 is smaller than the mass of asphalt, so that the inner ring 71 and the outer ring 72 can support and seal the rotation function when rotating, and the downward extension structure of the extension end 62 avoids the backflow of asphalt to the interlayer inside the transition pipe 51 after being driven, and the interlaced connection of the first limiting ring 74 and the second limiting ring 75 can further increase the blocking effect of the asphalt, so that the rotating sealing structure 7 has the function of retaining asphalt.

[0051] The application also provides a use method of the crack repairing equipment for asphalt pavement, which comprises the following steps:

[0052] S1, aligning and installing: place the trolley 1 above the crack, insert the rotating shaft 31 into the fixed sleeve 52, and insert the pin 55 into the vertical slot 44, at this time the bottom end of the rotating shaft 31 is inserted into the crack, and the driving motor 11 and the driving gear 43 are engaged to form a driving force, and the rotating power of the driving ring 41 is supported;

[0053] S2, polishing the inner wall of the crack: rotating the rotating shaft 31 to polish the inner wall of the crack, at this time the operator can push the trolley 1 to move, so that the rotating shaft 31 moves along the crack and polishes the inner wall of the crack, increases the adhesion of asphalt and crack, and avoids the crack;

[0054] S3, adhesion: the rotating shaft 31 forms a conical cross-section groove at the top of the crack after polishing, the overflowed asphalt can be accumulated in the groove after filling the crack, and the adhesion area and the support area of the asphalt are increased;

[0055] S4, filling: the rotating shaft 31 can fill the crack during filling of the device, and the crack is filled from the bottom, which can prevent the generation of bubbles and make the asphalt adhere to the inner wall more closely.

[0056] It should be noted that in this paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0057] The above is only the preferred embodiment of the present application, it should be noted that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A crack repair device for asphalt pavement, comprising a trolley and a storage cylinder inside the trolley, characterized in that: The inner side of the trolley is also equipped with a transverse sliding structure, which includes a sliding groove, a slide rail, a sliding plate, and a connecting inner groove. The lower end of the trolley is provided with a sliding groove, and the inside of the sliding groove is symmetrically provided with slide rails. The upper end of the slide rail is slidably connected to a sliding plate, and the inner side of the sliding plate is provided with a connecting inner groove. The lower end of the sliding plate is equipped with a grinding structure, which includes a rotating shaft and a cutting blade. The outer side of the rotating shaft is provided with a cutting blade, and the rotating shaft is used to rotatably connect to the inside of the connecting inner groove. The inner connecting groove is also rotatably connected to a power support structure. A transition structure is vertically fixed on the inner side of the power support structure. The power support structure is used to install the transition structure in the inner connecting groove, and the rotating shaft is used to install at the bottom end of the transition structure. The power support structure includes a drive ring, a support bearing, a drive gear, and a mating vertical groove. The inner wall of the drive ring has a ring array of mating vertical grooves, and the outer side of the drive ring is equipped with a support bearing. The support bearing is used to support the drive ring to rotate in the inner connecting groove. The transition structure includes a transition pipe, a fixed sleeve, a threaded bracket, a limiting inner groove, and a plug pin. The lower end of the transition pipe is provided with a fixed sleeve. A threaded bracket is fixedly installed inside the transition pipe. The threaded bracket and the transition pipe are coaxial. The top end of the transition pipe has a ring array of plug pins. The plug pin is used to vertically insert the transition pipe into the mating vertical groove. The inner wall of the transition pipe is also provided with a limiting inner groove. A feeding structure is also installed inside the transition pipe. The lower end of the rotating shaft is provided with a cutting bottom end, and the interior of the cutting bottom end is a cavity.

2. The asphalt pavement crack repair equipment according to claim 1, characterized in that: The grinding structure also includes a cutting bottom end, a fixed end, and a beveled side. The bottom end of the rotating shaft is provided with a cutting bottom end, and the outer cross-section of the cutting blade is inclined, which is the beveled side.

3. The asphalt pavement crack repair equipment according to claim 2, characterized in that: The feeding structure includes a conveying pipe and an extension end. The conveying pipe is installed at the bottom of the limiting inner groove. The lower end of the conveying pipe is provided with an extension end, and the bottom end of the extension end is inserted into the inner wall of the transition pipe.

4. The asphalt pavement crack repair equipment according to claim 3, characterized in that: A fixing ring is installed on the outer side of the fixing sleeve, and a mating inner groove is provided on the inner wall of the transition pipe. The fixing end is used to fit against the inner wall of the mating inner groove, and the fixing ring is used to tighten the lower end of the fixing sleeve. A drive motor is also installed on the upper end of the trolley, and the drive motor is used to mesh with the drive gear.

5. The asphalt pavement crack repair equipment according to claim 4, characterized in that: Symmetrical support rods are provided on the outer side of the conveying pipe, and a lifting rod is provided at the top of the support rod. A connecting pipe is installed at the top of the conveying pipe, and the other end of the connecting pipe is connected to the storage cylinder.

6. The asphalt pavement crack repair equipment according to claim 5, characterized in that: A rotary sealing structure is installed on the outer side of the conveying pipe. The rotary sealing structure is used to rotatably install the conveying pipe inside the transition pipe. The rotary sealing structure includes an inner ring, an outer ring, supporting balls, a first limiting ring, and a second limiting ring. The inner ring is installed on the outer side of the outer ring. Supporting balls are installed between the inner ring and the outer ring. The supporting balls are used to support the rotatable connection between the inner ring and the outer ring. The outer surface of the outer ring is provided with a second limiting ring. The inner wall of the inner ring is provided with a first limiting ring. The first limiting ring and the second limiting ring are in an alternating overlapping state. There is a gap between the inner ring and the outer ring, and the gap interval is 0.3 mm.

7. The method of using the asphalt pavement crack repair equipment according to claim 6, characterized in that: Includes the following steps: S1. Alignment and installation: Place the trolley above the crack, and insert the shaft into the fixed sleeve while the pin is embedded in the mating vertical groove. At this time, the bottom end of the shaft will be inserted into the crack, and the drive motor will mesh with the drive gear to generate driving force, thus providing rotational power support for the drive ring. S2. Grinding the inner wall of the crack: By rotating the shaft, the inner wall of the crack is ground. At this time, the operator can push the cart to move the shaft along the crack and grind the inner wall of the crack, increasing the adhesion between the asphalt and the crack and preventing the crack from forming. S3, Adhesion: After the shaft is ground, a conical cross-section groove is formed at the top of the crack. This groove allows the overflowing asphalt to accumulate in the groove after the asphalt has filled the crack, increasing the adhesion area and support area of ​​the asphalt. S4. Filling: During the filling process, the cracks can be filled by rotating the shaft and by filling from the bottom of the cracks. Filling from the bottom can prevent the generation of air bubbles and make the asphalt adhere more tightly to the inner wall.

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