A construction process for filling cracks in asphalt pavement

Abstract

The present invention discloses a construction process for filling cracks in asphalt pavement, comprising a stirring mechanism in step one, wherein the stirring mechanism comprises a base, a stirring box is mounted on the top of the base, a stirring mechanism is provided inside the stirring box, the stirring mechanism comprises a stirring rod mounted vertically upward via a bearing, the top of the stirring rod passes through the top of the stirring box and is connected to a first motor, a spiral stirring shaft is mounted at the center of the outer wall of the stirring rod, T-shaped stirring shafts are mounted at both ends of the bottom of the outer wall of the stirring rod, and a heating plate is mounted on the inner wall of the stirring box. When filling cracks, the present invention only requires pushing the device along the crack trajectory to keep the filling box covering the crack. Compared with the prior art, controlling the nozzle to be positioned above the crack is simpler, reducing the workload of the staff, and during the process of pushing the filling box, the nozzle inside the filling box can self-adjust to the nozzle that needs to be filled downward by continuously moving up and down.

Description

Technical Field

[0001] The invention relates to the technical field of road construction, in particular to a construction process for filling cracks in asphalt pavement. Background Art

[0002] With the rapid development of my country's social economy, the requirements for the comprehensive service quality of highway transportation are becoming higher and higher. However, after a period of use, cracks, potholes, ruts and other defects will appear on the surface of the highway. Among them, cracks are one of the most common and most likely to occur among all kinds of road surface defects. The harm of road cracks not only affects the appearance of the road and the driving comfort, but if the cracks are not sealed and repaired in time, they are more likely to expand further, allowing rainwater and other debris to enter the surface structure and roadbed along the cracks, causing structural damage to the road, resulting in a decrease in the bearing capacity of the road surface, and accelerating local or large-scale damage to the road surface, thereby shortening the service life of the road. Therefore, cracks need to be repaired in time after they are found.

[0003] Existing asphalt filling equipment requires the nozzle to be controlled to remain directly above the crack during the filling process to avoid asphalt waste. However, this control requires workers to concentrate highly, resulting in higher workload and making it more difficult to fill cracks on roads with different slopes.

[0004] Therefore, it is necessary to provide a construction process for filling cracks in asphalt pavement to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a construction process for filling cracks in asphalt pavement to solve the problems existing in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a construction process for filling cracks in an asphalt pavement, the construction process comprising the following steps:

[0007] Step 1: Before crack filling, first determine the road cracks that need to be filled, then heat the asphalt through the stirring mechanism to make it molten, and then stir the asphalt at the bottom to transport it to the top to ensure that the temperature of the asphalt at all locations is consistent and that the asphalt does not solidify;

[0008] Step 2: When crack filling is required, the worker first moves the device to the crack to ensure that the filling box covers the crack. Then the worker moves the device along the crack trajectory, keeping the filling box covering the crack during the movement.

[0009] Step 3: When filling cracks on a sloped road, when the device is moved to the crack location, the filling box will automatically adjust to a suitable angle to fit the ground through two hinged rotating rods. During the adjustment of the filling box, the L-shaped transport tube will also change its angle, which will drive the elastic telescopic tube to adjust accordingly;

[0010] Step 4: When filling with asphalt, the second motor of the filling mechanism is activated to drive the cam to rotate. The rotation of the cam squeezes the connecting plate, thereby driving the nozzle to move downward. Then, the first spring is provided to make the nozzle reciprocate up and down. When the nozzle moves downward, the nozzle will move downward only when there is a crack directly below the nozzle to fill with asphalt. If there is the ground directly below the nozzle, the nozzle will be prevented from moving downward and asphalt filling will not be carried out.

[0011] Step 5: When the connecting plate moves downward, it will drive the sprinkler head to move downward through the annular cover. When the ground prevents the sprinkler head from moving downward, the connecting plate will drive the annular cover to squeeze the second spring against the outer wall of the sprinkler head and move downward. In this way, even if the sprinkler head does not move downward, it will not affect the reciprocating motion of the connecting plate, thereby not affecting the sprinkler head that can move downward for filling operations.

[0012] Step 6: When the nozzle moves downward, the third spring will squeeze the sealing plate outward, thereby squeezing the inclined plate to rotate outward. When the cone-shaped structure of the nozzle moves to the outside of the groove, the inner wall of the inclined plate will fit against the vertically downward outer wall of the nozzle. At this time, asphalt will fall through the through hole to fill the crack. When the nozzle is reset, the nozzle will move upward. When the nozzle moves upward, the inclined plate will squeeze the sealing plate through the elastic force of the torsion spring, thereby blocking the through hole and preventing it from being filled.

[0013] Preferably, the stirring mechanism in step one includes a base, a stirring box is installed on the top of the base, a stirring mechanism is arranged inside the stirring box, the stirring mechanism includes a stirring rod installed vertically upward through a bearing, the top of the stirring rod passes through the top of the stirring box and is connected to a first motor, a spiral stirring shaft is installed at the center of the outer wall of the stirring rod, T-shaped stirring shafts are installed at both ends of the bottom of the outer wall of the stirring rod, and a heating plate is installed on the inner wall of the stirring box.

[0014] Preferably, in step one, a connecting pipe is provided inside the mixing box and passes through the base, a one-way valve is installed at the bottom of the connecting pipe and passes through the outer wall of the base, the bottom of the connecting pipe is connected to a curved elastic telescopic tube, the end of the elastic telescopic tube is connected to an L-shaped transport tube, and rotating rods are hinged at the four corners of the bottom end of the base, the ends of the two groups of rotating rods are connected by bearings, and the rotating rods are connected to the filling box through the bearings.

[0015] Preferably, a filling mechanism is provided inside the filling box in step 2, and the filling mechanism includes a connecting groove opened on the top of the filling box, and an inner groove connected to the connecting groove is also opened inside the filling box, and a drop pipe is equidistantly connected to the bottom end of the inner groove, and a nozzle is movably sleeved on the outer wall of the drop pipe, and a circular ring cover is sleeved on the outer wall of the nozzle, and the circular ring covers are connected by a connecting plate, and the inner groove and the connecting plate are connected by a first spring, and a second motor is connected to an inner wall of the filling box, and a cam is connected to the output end of the second motor, and the shorter end of the cam is fitted on the top of the outermost connecting plate.

[0016] Preferably, a cavity is provided inside the annular cover, a circular plate fixed to the outer wall of the nozzle is fitted on the inner bottom of the cavity, and a second spring is provided to connect the top of the circular plate to the top of the cavity.

[0017] Preferably, a through hole is provided inside the nozzle, and the through hole consists of three circular holes from top to bottom and the holes become smaller in sequence. The uppermost circular hole of the through hole is slidably connected to the drop tube. The bottom of the nozzle is a truncated cone structure, and the top of the outer wall of the truncated cone structure of the nozzle is hinged with a sealing plate through a bearing. The outer wall of the truncated cone structure of the nozzle is provided with an opening, and a third spring is connected to the inside of the opening, and the other end of the third spring is fixedly connected to the sealing plate.

[0018] Preferably, grooves are formed at equal intervals on the bottom of the filling box, and both ends of the inner top of the grooves are connected to vertically downward fixing plates, and the bottom of the fixing plates is connected to an inclined plate via a torsion spring.

[0019] Preferably, balls are equidistantly arranged on the outer wall of the bottom end of the filling box.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. When filling cracks, the present invention only requires pushing the device along the crack trajectory to keep the filling box covering the crack. Compared with the existing technology, it is simpler to control the nozzle to be above the crack, which reduces the workload of the staff. In addition, during the process of pushing the filling box, the nozzle inside the filling box can automatically adjust the nozzle that needs to be filled downward by continuously moving up and down;

[0022] 2. When crack filling is required, the worker first moves the device to the crack to ensure that the filling box covers the crack. Then, the worker moves the device along the crack trajectory, keeping the filling box covering the crack during the movement. When filling cracks on a sloped road, when the device is moved to the crack location, the filling box will automatically adjust to a suitable angle to fit the ground through two hinged rotating rods. During the adjustment of the filling box, the L-shaped transport tube will also change its angle, which will drive the elastic telescopic tube to adjust as well.

[0023] 3. When filling asphalt, the present invention starts the second motor to drive the cam to rotate. The rotation of the cam will squeeze the connecting plate to drive the nozzle to move downward. Then, the first spring can make the nozzle move up and down. When the nozzle moves downward, the nozzle will move downward only when there is a crack directly below the nozzle to fill asphalt. When the ground is directly below the nozzle, the nozzle will be prevented from moving downward and no asphalt filling will be carried out.

[0024] 4. In the present invention, when the connecting plate moves downward, it will drive the nozzle to move downward through the annular plate. When the ground prevents the nozzle from moving downward, the connecting plate will drive the annular cover to squeeze the second spring on the outer wall of the nozzle to move downward. In this way, even if the nozzle does not move downward, it will not affect the reciprocating motion of the connecting plate, thereby not affecting the nozzle that can move downward for filling operations.

[0025] 5. In the present invention, when the nozzle moves downward, the sealing plate squeezes the inclined plate and rotates outward. When the cone-shaped structure of the nozzle moves to the outside of the groove, the inner wall of the inclined plate will fit against the vertical downward outer wall of the nozzle. When the nozzle is reset, the nozzle moves upward. When the nozzle moves upward, the inclined plate will squeeze the sealing plate through the elastic force of the torsion spring, thereby blocking the through hole and making it impossible to fill it. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the internal structure of the mixing box of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the filling box of the present invention;

[0029] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 A bottom view of a filling box according to the present invention.

[0031] In the figure: 1. base; 2. stirring box; 3. stirring mechanism; 301. stirring rod; 302. first motor; 303. spiral stirring shaft; 304. T-shaped stirring shaft; 305. heating plate; 4. connecting pipe; 401. one-way valve; 5. elastic telescopic tube; 6. L-shaped transport pipe; 7. rotating rod; 8. filling box; 9. filling mechanism; 901. connecting groove; 902. inner groove; 903. dropper; 904. nozzle; 9041. through hole; 9042. sealing plate; 9043. opening; 9044. third spring; 905. ring cover; 9051. cavity; 9052. circular plate; 9053. second spring; 906. connecting plate; 907. first spring; 908. second motor; 909. cam; 10. groove; 11. fixing plate; 12. tilting plate; 13. ball bearing. DETAILED DESCRIPTION

[0032] 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.

[0033] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0034] See also Figure 1-5 A construction process for filling cracks in an asphalt pavement comprises the following steps:

[0035] Step 1: Before crack filling, first determine the road cracks that need to be filled, then heat the asphalt through the stirring mechanism 3 to make it molten, and then stir the asphalt at the bottom to transport it to the top to ensure that the temperature of the asphalt at all locations is consistent and that the asphalt does not solidify;

[0036] Step 2: When crack filling is required, the staff first moves the device to the crack to ensure that the filling box 8 covers the crack, and then the staff moves the device along the crack track, keeping the filling box 8 covering the crack during the movement;

[0037] Step 3: When filling cracks on a sloped road, when the mobile device reaches the crack location, the filling box 8 will automatically adjust to a suitable angle to fit the ground through the two hinged rotating rods 7. During the adjustment of the filling box 8, the L-shaped transport tube 6 will also change its angle, which will drive the elastic telescopic tube 5 to adjust as well.

[0038] Step 4: When filling with asphalt, the second motor 908 of the filling mechanism 9 is started to drive the cam 909 to rotate. The rotation of the cam 909 squeezes the connecting plate 906, thereby driving the nozzle 904 to move downward. Then, the first spring 907 is provided to make the nozzle 904 reciprocate up and down. When the nozzle 904 moves downward, it will only move downward when there is a crack directly below the nozzle 904 to fill with asphalt. If there is the ground directly below the nozzle 904, the nozzle 904 will be prevented from moving downward, and asphalt filling will not be carried out.

[0039] Step 5: When the connecting plate 906 moves downward, it drives the nozzle 904 downward through the annular cover 905. When the ground prevents the nozzle 904 from moving downward, the connecting plate 906 drives the annular cover 905 to press the second spring 9053 against the outer wall of the nozzle 904 and move it downward. In this way, even if the nozzle 904 does not move downward, the reciprocating motion of the connecting plate 906 will not be affected, and the nozzle 904, which can move downward for filling, will not be affected.

[0040] Step six: When the nozzle 904 moves downward, the third spring 9044 will squeeze the sealing plate 9042 outward, thereby squeezing the inclined plate 12 to rotate outward. When the cone-shaped structure of the nozzle 904 moves to the outside of the groove 10, the inner wall of the inclined plate 12 will fit the vertically downward outer wall of the nozzle 904. At this time, asphalt will fall through the through hole 9041 to fill the crack. When the nozzle 904 is reset, the nozzle 904 will move upward. When the nozzle 904 moves upward, the inclined plate 12 will squeeze the sealing plate 9042 through the elastic force of the torsion spring, thereby blocking the through hole 9041 and preventing it from being filled.

[0041] like Figure 1-5As shown, the stirring mechanism 3 in step one includes a base 1, a stirring box 2 is installed on the top of the base 1, and a stirring mechanism 3 is arranged inside the stirring box 2. The stirring mechanism 3 includes a stirring rod 301 installed vertically upward through a bearing, the top of the stirring rod 301 passes through the top of the stirring box 2 and is connected to a first motor 302, a spiral stirring shaft 303 is installed at the center of the outer wall of the stirring rod 301, and T-shaped stirring shafts 304 are installed at both ends of the bottom of the outer wall of the stirring rod 301. A heating plate 305 is installed on the inner wall of the stirring box 2. Before filling the cracks, the heating plate 305 inside the stirring box 2 is first started to heat the asphalt to make the asphalt in a molten state, and then the first motor 302 is started to rotate the stirring rod 301. During the rotation of the stirring rod 301, the spiral stirring shaft 303 can be used to transport the asphalt at the bottom end of the stirring box 2 to the top to ensure that the temperature of each position of the asphalt is consistent, and the T-shaped stirring shaft 304 can be used to stir the asphalt at the bottom of the stirring box 2 to keep it in a molten state to prevent it from solidifying.

[0042] like Figure 1-5 As shown, in step 1, a connecting pipe 4 is provided inside the mixing box 2 that passes through the base 1, and a one-way valve 401 is installed at the bottom of the connecting pipe 4 that passes through the outer wall of the base 1. The bottom of the connecting pipe 4 is connected to a curved elastic telescopic tube 5, and the end of the elastic telescopic tube 5 is connected to an L-shaped transport pipe 6. The four corners of the bottom end of the base 1 are hinged with rotating rods 7, and the ends of the two sets of rotating rods 7 are connected by bearings. The rotating rods 7 are connected to a filling box 8 through bearings. When crack filling is required, the staff first moves the device to the crack to ensure that the filling box 8 covers the crack, and then the staff moves the device along the crack trajectory, keeping the filling box 8 covering the crack during the movement. When filling cracks on a sloped road, when the device is moved to the crack position, the filling box 8 will automatically adjust to a suitable angle to fit the ground through the two hinged rotating rods 7. In the process of adjusting the filling box 8, the L-shaped transport pipe 6 will also change its angle, which will drive the elastic telescopic tube 5 to adjust.

[0043] like Figure 1-5As shown, the filling box 8 in step 2 is provided with a filling mechanism 9 inside, which includes a connecting groove 901 opened at the top of the filling box 8, and an inner groove 902 connected to the connecting groove 901 is further opened inside the filling box 8, and a drop pipe 903 is equidistantly connected to the bottom end of the inner groove 902, and a nozzle 904 is movably sleeved on the outer wall of the drop pipe 903, and a circular ring cover 905 is sleeved on the outer wall of the nozzle 904, and the circular ring covers 905 are connected by a connecting plate 906, and the inner groove 902 and the connecting plate 906 are connected by a first spring 907. A second motor 908 is connected to an inner wall of the filling box 8, and a cam 909 is connected to the output end of the second motor 908. The shorter end of the cam 909 is fitted on the top of the outermost connecting plate 906. When filling asphalt, the second motor 908 is started to drive the cam 909 to rotate, and the cam 909 The rotation will squeeze the connecting plate 906, thereby driving the nozzle 904 to move downward, and then the first spring 907 can make the nozzle 904 move up and down. When the nozzle 904 moves downward, it will only move downward when there is a crack directly below the nozzle 904 to perform asphalt filling. When the ground is directly below the nozzle 904, the nozzle 904 will be prevented from moving downward and asphalt filling will not be performed.

[0044] like Figure 1-5 As shown, a cavity 9051 is provided inside the circular cover 905, and a circular plate 9052 fixed to the outer wall of the nozzle 904 is fitted on the inner bottom end of the cavity 9051. The top of the circular plate 9052 is connected to the top of the cavity 9051 by a second spring 9053. When the connecting plate 906 moves downward, the nozzle 904 is driven to move downward through the circular plate. When the ground prevents the nozzle 904 from moving downward, the connecting plate 906 drives the circular cover 905 to squeeze the second spring 9053 on the outer wall of the nozzle 904 and move downward. In this way, even if the nozzle 904 does not move downward, it will not affect the reciprocating motion of the connecting plate 906, thereby not affecting the nozzle 904 that can move downward for filling operations.

[0045] like Figure 1-5As shown, a through hole 9041 is provided inside the nozzle 904, and the through hole 9041 is composed of three circular holes from top to bottom and the holes become smaller in sequence. The uppermost circular hole of the through hole 9041 is slidably connected to the drop tube 903, and the bottom of the nozzle 904 is a truncated cone structure. The top of the outer wall of the truncated cone structure of the nozzle 904 is hinged with a sealing plate 9042 through a bearing. An opening 9043 is provided on the outer wall of the truncated cone structure of the nozzle 904, and the inside of the opening 9043 is connected to a third spring 9044. The other end of the third spring 9044 is fixedly connected to the sealing plate 9042. When the nozzle 904 moves downward until the truncated cone structure is outside the groove 10, the third spring 9044 will squeeze the sealing plate 9042 outward to rotate through the bearing. At this time, the asphalt will fall through the through hole 9041 to fill the crack.

[0046] like Figure 1-5 As shown, grooves 10 are equidistantly provided at the bottom of the filling box 8, and vertically downward fixed plates 11 are connected to the two ends of the inner top of the groove 10. The bottom of the fixed plate 11 is connected to an inclined plate 12 through a torsion spring. When the nozzle 904 is in the original position, the inclined plate 12 will always fit on the sealing plate 9042 by the elastic force of the torsion spring to seal the through hole 9041. When the nozzle 904 moves downward, the sealing plate 9042 squeezes the inclined plate 12 to rotate outward. When the cone-shaped structure of the nozzle 904 moves to the outside of the groove 10, the inner wall of the inclined plate 12 will fit on the vertically downward outer wall of the nozzle 904. When the nozzle 904 is reset, the nozzle 904 will move upward. When the nozzle 904 moves upward, the inclined plate 12 will squeeze the sealing plate 9042 by the elastic force of the torsion spring, thereby blocking the through hole 9041 and making it impossible to fill.

[0047] like Figure 1-5 As shown, balls 13 are evenly spaced on the outer wall of the bottom end of the filling box 8. By evenly spaced on the outer wall of the bottom end of the filling box 8, the friction between the filling box 8 and the ground can be reduced.

[0048] Working principle: Before filling cracks, first start the heating plate 305 inside the mixing box 2 to heat the asphalt so that the asphalt is in a molten state, and then start the first motor 302 to rotate the stirring rod 301. During the rotation of the stirring rod 301, the asphalt at the bottom end of the mixing box 2 can be transported to the top through the spiral stirring shaft 303 to ensure that the temperature of the asphalt at all positions is consistent. The asphalt at the bottom of the mixing box 2 can be stirred and kept in a molten state to prevent solidification through the T-shaped stirring shaft 304. When crack filling is required, the staff first moves the device to the crack to ensure that the filling box 8 covers the crack, and then the staff moves the device along the crack trajectory, keeping the filling box 8 covering the crack during the movement. When filling cracks on a sloped road, when the device is moved to the crack position, the filling box 8 will automatically adjust to a suitable angle to fit the ground through the two hinged rotating rods 7. During the adjustment of the filling box 8, the L-shaped transport pipe 6 will also change its angle, which will drive the elastic telescopic pipe 5 to adjust. When filling asphalt, start the second motor 908 The cam 909 is driven to rotate, and the rotation of the cam 909 squeezes the connecting plate 906, thereby driving the nozzle 904 to move downward. Then, the nozzle 904 can make a reciprocating motion up and down through the first spring 907. When the nozzle 904 moves downward, the nozzle 904 will move downward only when there is a crack directly below the nozzle 904 to fill the asphalt. When the ground is directly below the nozzle 904, the nozzle 904 will be prevented from moving downward and asphalt filling will not be performed. When the connecting plate 906 moves downward, it will drive the nozzle 904 to move downward through the circular plate. When the ground prevents the nozzle 904 from moving downward, the connecting plate 906 will drive the circular cover 905 The second spring 9053 is squeezed on the outer wall of the nozzle 904 to move downward. In this way, even if the nozzle 904 does not move downward, it will not affect the reciprocating motion of the connecting plate 906, thereby not affecting the nozzle 904 that can move downward for filling operations. When the nozzle 904 moves downward until the truncated cone structure is outside the groove 10, the third spring 9044 will squeeze the sealing plate 9042 outward to rotate through the bearing. At this time, the asphalt will fall through the through hole 9041 to fill the crack. When the nozzle 904 moves downward, the sealing plate 9042 squeezes the inclined plate 12 to rotate outward. When the truncated cone structure of the nozzle 904 moves to the outside of the groove 10, the inner wall of the inclined plate 12 will fit against the vertical downward outer wall of the nozzle 904. When the nozzle 904 is reset, the nozzle 904 will move upward. When the nozzle 904 moves upward, the inclined plate 12 will squeeze the sealing plate 9042 through the elastic force of the torsion spring, thereby blocking the through hole 9041 and preventing filling.

[0049] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A construction process for filling cracks in an asphalt pavement, the construction process comprising the following steps: Step 1: Before crack filling, first determine the road cracks that need to be filled, then heat the asphalt through the stirring mechanism (3) to make the asphalt molten, and then stir the asphalt at the bottom to transport it to the top to ensure that the temperature of the asphalt at each location is consistent and that the asphalt does not solidify; Step 2: When crack filling is required, the staff first moves the device to the crack to ensure that the filling box (8) covers the crack, and then the staff moves the device along the crack track, keeping the filling box (8) covering the crack during the movement; Step 3: When filling cracks on a sloped road, when the mobile device is moved to the crack position, the filling box (8) is automatically adjusted to a suitable angle to fit the ground through the two hinged rotating rods (7). During the adjustment of the filling box (8), the L-shaped transport tube (6) will also change its angle, which will drive the elastic telescopic tube (5) to adjust; Step 4: When filling with asphalt, the second motor (908) of the filling mechanism (9) is started to drive the cam (909) to rotate. The rotation of the cam (909) squeezes the connecting plate (906) to drive the nozzle (904) to move downward. Then, the first spring (907) is provided to make the nozzle (904) move up and down. When the nozzle (904) moves downward, the nozzle (904) will move downward only when there is a crack directly below the nozzle (904) to fill with asphalt. When there is the ground directly below the nozzle (904), the nozzle (904) will be prevented from moving downward and the asphalt filling will not be carried out. Step 5: When the connecting plate (906) moves downward, it drives the nozzle (904) to move downward through the annular cover (905). When the nozzle (904) is prevented from moving downward by the ground, the connecting plate (906) drives the annular cover (905) to squeeze the second spring (9053) on the outer wall of the nozzle (904) to move downward. In this way, even if the nozzle (904) does not move downward, it will not affect the reciprocating motion of the connecting plate (906), thereby not affecting the nozzle (904) that can move downward to perform the filling operation; Step 6: When the nozzle (904) moves downward, the third spring (9044) will squeeze the sealing plate (9042) outward, thereby squeezing the inclined plate (12) to rotate outward. When the cone-shaped structure of the nozzle (904) moves to the outside of the groove (10), the inner wall of the inclined plate (12) will fit the outer wall of the nozzle (904) pointing vertically downward. At this time, asphalt will fall through the through hole (9041) to fill the crack. When the nozzle (904) is reset, the nozzle (904) will move upward. When the nozzle (904) moves upward, the inclined plate (12) will squeeze the sealing plate (9042) through the elastic force of the torsion spring, thereby blocking the through hole (9041) and preventing it from being filled. The stirring mechanism (3) in step 1 comprises a base (1), a stirring box (2) is mounted on the top of the base (1), a stirring mechanism (3) is arranged inside the stirring box (2), the stirring mechanism (3) comprises a stirring rod (301) mounted vertically upward through a bearing, the top of the stirring rod (301) passes through the top of the stirring box (2) and is connected to a first motor (302), a spiral stirring shaft (303) is mounted at the center of the outer wall of the stirring rod (301), T-shaped stirring shafts (304) are mounted at both ends of the bottom of the outer wall of the stirring rod (301), and a heating plate (305) is mounted on the inner wall of the stirring box (2); In step 1, a connecting pipe (4) penetrating the base (1) is provided inside the mixing box (2), a one-way valve (401) is installed at the bottom of the connecting pipe (4) penetrating the outer wall of the base (1), a curved elastic telescopic tube (5) is connected to the bottom of the connecting pipe (4), an L-shaped transport tube (6) is connected to the end of the elastic telescopic tube (5), and rotating rods (7) are hinged at the four corners of the bottom end of the base (1), the ends of two groups of rotating rods (7) are connected by bearings, and the rotating rods (7) are connected to the filling box (8) through the bearings.

2. A construction process for filling cracks in asphalt pavement according to claim 1, characterized in that: The filling box (8) in step 2 is provided with a filling mechanism (9) therein, the filling mechanism (9) comprising a connecting groove (901) provided on the top of the filling box (8), an inner groove (902) in communication with the connecting groove (901) provided inside the filling box (8), a drop pipe (903) being connected to the bottom end of the inner groove (902) at equal distances, a nozzle (904) being movably sleeved on the outer wall of the drop pipe (903), and a circular nozzle (904) being sleeved on the outer wall of the nozzle (904) The ring covers (905) are connected to each other via a connecting plate (906), the inner groove (902) and the connecting plate (906) are connected via a first spring (907), an inner wall of the filling box (8) is connected to a second motor (908), an output end of the second motor (908) is connected to a cam (909), and a shorter end of the cam (909) is attached to the top of the outermost connecting plate (906).

3. A construction process for filling cracks in asphalt pavement according to claim 2, characterized in that: A cavity (9051) is provided inside the annular cover (905), and a circular plate (9052) fixed to the outer wall of the nozzle (904) is provided at the bottom of the cavity (9051), and the top of the circular plate (9052) is connected to the top of the cavity (9051) via a second spring (9053).

4. A construction process for filling cracks in asphalt pavement according to claim 3, characterized in that: A through hole (9041) is provided inside the nozzle (904), and the through hole (9041) is composed of three circular holes from top to bottom, and the holes are successively smaller. The uppermost circular hole of the through hole (9041) is in sliding connection with the drop tube (903). The bottom of the nozzle (904) is a truncated cone structure. The top of the outer wall of the truncated cone structure of the nozzle (904) is hinged with a sealing plate (9042) through a bearing. The outer wall of the truncated cone structure of the nozzle (904) is provided with an opening (9043). The inside of the opening (9043) is connected to a third spring (9044), and the other end of the third spring (9044) is fixedly connected to the sealing plate (9042).

5. A construction process for filling cracks in asphalt pavement according to claim 4, characterized in that: The bottom of the filling box (8) is provided with grooves (10) at equal intervals, and the top ends of the grooves (10) are connected to vertically downward fixing plates (11), and the bottom of the fixing plate (11) is connected to an inclined plate (12) via a torsion spring.

6. The construction process for filling cracks in asphalt pavement according to claim 1, characterized in that: Balls (13) are equidistantly arranged on the outer wall of the bottom end of the filling box (8).

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