An asphalt paving apparatus for municipal engineering construction

Abstract

The application relates to a municipal engineering building asphalt paving device which comprises a caterpillar walking mechanism, a road surface cleaning mechanism, a stirring and extruding mechanism and a smoothing and compacting mechanism which are sequentially and integrally arranged along the device walking; the road surface cleaning mechanism is arranged at the front end of the caterpillar walking mechanism and cleans the road surface when the caterpillar walking mechanism walks forward; the stirring and extruding mechanism stirs and extrudes multiple asphalt belts by equally dividing asphalt mixture into multiple portions; the smoothing and compacting mechanism is started synchronously to jointly smooth and compact the multiple asphalt belts to form an asphalt layer; the paving device avoids the asphalt aggregate segregation in the prior art, thereby ensuring the uniformity of the asphalt layer thickness.

Description

Technical Field

[0001] This application relates to the field of asphalt road construction equipment technology, and in particular to asphalt paving equipment for municipal engineering construction. Background Technology

[0002] Currently, in asphalt pavement construction, since asphalt mixtures are composed of large aggregates, fine aggregates, and asphalt mortar, large stones tend to shift and accumulate to both sides during the overall transportation and paving process, causing aggregate segregation and resulting in uneven pavement strength. At the same time, it is difficult to ensure that the thickness and density of the material are consistent throughout the entire width direction, which can easily lead to problems such as local excessive thickness, excessive thinness, and inconsistent density. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, this application provides an asphalt paving equipment for municipal engineering construction. The paving equipment ensures the uniformity of asphalt material and prevents aggregate segregation at the source, and also ensures that the material thickness and density are consistent throughout the width direction when the material is laid.

[0004] This application provides an asphalt paving device for municipal engineering construction, which adopts the following technical solution: it includes a tracked walking mechanism, a road sweeping mechanism, a mixing and extrusion mechanism, and a smoothing and compaction mechanism that are sequentially integrated along the device's travel path. The road sweeping mechanism is located at the front end of the tracked walking mechanism and cleans the road surface as the tracked walking mechanism moves forward. The mixing and extrusion mechanism divides the asphalt mixture into multiple portions, mixes them, and extrudes multiple asphalt strips. Simultaneously, the smoothing and compaction mechanism is activated to smooth and compact the multiple asphalt strips together to form an asphalt layer.

[0005] Preferably, the mixing and extrusion mechanism includes a material distribution section and a mixing and conveying section. The bottom of the material distribution section is connected to the mixing and conveying section. The material distribution section is used to divide the asphalt material raw material into multiple portions and distribute them into the mixing and conveying section. The mixing and conveying section mixes the raw material to form asphalt material and pushes the asphalt material to the output port for output.

[0006] Preferably, the mixing and conveying section includes multiple mixing and conveying units, each of which includes an inclined conveying pipe and a transverse conveying pipe. The inclined conveying pipe and the transverse conveying pipe are connected. An inclined spiral shaft with the same inclination as the conveying pipe is provided inside the inclined conveying pipe, and a transverse spiral shaft is provided inside the transverse conveying pipe. The spiral shaft is equipped with a drive system.

[0007] Preferably, the drive system includes multiple independent motor drives, each of which corresponds to an oblique helical shaft and a transverse helical shaft.

[0008] Preferably, the drive system includes multiple sets of rotating rods, each with a first bevel gear at its upper end and a worm gear connected to its lower end. The first bevel gear meshes with a meshing gear at the rotating end of the corresponding oblique spiral shaft, and the worm gear meshes with a worm wheel at the rotating end of the corresponding transverse spiral shaft. The rotating rods rotate synchronously through a main gear drive unit to achieve synchronous opening and closing of multiple sets of stirring and conveying units. The main gear drive unit is equipped with a motor.

[0009] Preferably, the outlet of the transverse conveying pipe is an isosceles trapezoid.

[0010] Preferably, the material distribution section includes multiple raw material cylinders, which are nested in multiple stages with different diameters but the same center. Each raw material cylinder is provided with a uniform partition plate and a corresponding discharge valve at its bottom, and the raw materials are evenly distributed and discharged through the uniform partition plate and the discharge valve.

[0011] Preferably, the ironing and compaction mechanism includes a connecting arm hinged to the periphery of the mixing and extrusion mechanism. The connecting arm is also equipped with a hydraulic device to control the raising or lowering of the connecting arm. The connecting arm is connected to an ironing plate, which is provided with a vibrating part to form vibration compaction. The bottom surface of the ironing plate is a horizontal plane and is flush with the ground and the discharge end of the output port.

[0012] Preferably, the road sweeping mechanism includes a scraper and a sweeping roller, with the scraper disposed at the front end of the sweeping roller.

[0013] Preferably, the stirring extrusion mechanism is equipped with a heating and heat preservation system.

[0014] In summary, this application includes at least one of the following beneficial technical effects: This application integrates a road sweeping mechanism, a mixing and extrusion mechanism, and a screeding and compaction mechanism to form an asphalt paving equipment. The road sweeping mechanism keeps the road surface clean to a certain extent, improving the adhesion between the asphalt material and the road surface. The cooperation between the mixing and extrusion mechanism and the screeding and compaction mechanism ensures that the asphalt layer laid on the road surface has a consistent thickness in terms of width.

[0015] The mixing and extrusion mechanism in this application divides the asphalt material into multiple equal parts along the paving width, avoiding the problem of aggregate segregation during transportation caused by pre-mixing the asphalt material in the prior art. It also forms multiple asphalt strips, which are then flattened and compacted by a vibrating screed to form the asphalt layer. Attached Figure Description

[0016] Figure 1 This is a 3D schematic diagram of asphalt paving equipment; Figure 2 yes Figure 1 Side view; Figure 3 This is a top view of the material distribution section; Figure 4 This is a schematic diagram of the interior of the material distribution section; Figure 5 This is a schematic diagram of the first type of drive system; Figure 6 This is a schematic diagram of the second type of drive system; Figure 7 This is a top view of the main gear drive unit.

[0017] Explanation of reference numerals in the attached drawings: 1. Tracked walking mechanism; 2. Road sweeping mechanism; 3. Scraper; 4. Sweeping roller; 5. Mixing and extrusion mechanism; 6. Material distribution section; 7. Raw material cylinder; 8. Equalizing plate; 9. Discharge valve; 10. Mixing and conveying section; 11. Inclined conveying pipe; 12. Transverse conveying pipe; 13. Inclined spiral shaft; 14. Transverse spiral shaft; 15. Drive system; 16. Rotating rod; 17. First bevel gear; 18. Worm gear; 19. Meshing gear one; 20. Worm wheel; 21. Main gear drive unit; 22. Ironing and compaction mechanism; 23. Ironing plate; 24. Vibration unit. Detailed Implementation

[0018] The present application will be further described in detail below with reference to the accompanying drawings.

[0019] For reference Figures 1-7 As shown, this application provides an asphalt paving device for municipal engineering construction, including a tracked walking mechanism 1 (the tracked walking mechanism 1 is prior art and will not be described in detail here), a road sweeping mechanism 2, a mixing and extrusion mechanism 5, and a smoothing and compaction mechanism 22, which are sequentially integrated along the device. The road sweeping mechanism 2 is located at the front end of the tracked walking mechanism 1 and cleans the road surface as the tracked walking mechanism 1 moves forward. The mixing and extrusion mechanism 5 divides the asphalt mixture into multiple portions, mixes them, and extrudes multiple asphalt strips. Simultaneously, the smoothing and compaction mechanism 22 is activated to smooth and compact the multiple asphalt strips together to form an asphalt layer.

[0020] Specifically, see, for example Figures 3-5As shown, the mixing and extrusion mechanism 5 includes a material distribution section 6 and a mixing and conveying section 10. The bottom of the material distribution section 6 is connected to the mixing and conveying section 10. The material distribution section 6 is used to evenly divide the asphalt raw material into multiple portions and distribute them into the mixing and conveying section 10. The material distribution section 6 includes multiple raw material cylinders 7 with the same center but different diameters. Since the raw materials constituting the asphalt material include at least three types of materials such as asphalt slurry, coarse aggregate, and fine aggregate, there are at least three raw material cylinders 7. The multiple raw material cylinders 7 are nested together, and adjacent raw material cylinders 7 are connected by connecting frames. The connecting frames are evenly distributed circumferentially to ensure the coaxiality and structural strength of the nested structure. Each raw material cylinder 7 is equipped with a removable sealing cover plate on its top for feeding and internal maintenance. The innermost raw material cylinder 7 is the asphalt slurry cylinder, which is equipped with a heating and mixing assembly inside, including a heating wire and a mixing paddle. The heating temperature is controllable to maintain the asphalt slurry in a flowing state and ensure that it is fully mixed with the coarse and fine aggregates. Each raw material cylinder 7 has a bottom-connected equalization chamber. Each equalization chamber contains an adjustable equalization plate 8, which divides the chamber circumferentially into four, six, or eight equal parts. The number of divisions is selected based on the road paving width. The equalization plate 8 is a detachable insert type, fixed by slots and positioning pins to ensure division accuracy. Each equalization chamber has a corresponding electrically controlled discharge valve 9 at its bottom. The discharge valve 9 is electrically connected to the equipment control panel, allowing for simultaneous opening or individual closing to ensure that the slurry, coarse aggregate, and fine aggregate are evenly distributed into the mixing and conveying unit 10 according to the specified proportions. The mixing and conveying unit 10 contains multiple mixing and conveying units. These units thoroughly mix the evenly distributed raw materials to form asphalt material, which is then pushed onto the road surface to form an asphalt strip. Specifically, as shown... Figure 5 As shown, the mixing and conveying unit includes an inclined conveying pipe 11 and a transverse conveying pipe 12, which are connected. An inclined spiral shaft 13 with the same inclination as the conveying pipe is installed inside the inclined conveying pipe 11, and a transverse spiral shaft 14 is installed inside the transverse conveying pipe 12. Both the inclined spiral shaft 13 and the transverse spiral shaft 14 have mixing and pushing functions. The inclined spiral shaft 13 mixes the raw materials from the distribution section 6 to form asphalt material and pushes it into the transverse conveying pipe 12. The transverse spiral shaft 14 in the transverse conveying pipe 12 pushes the asphalt material to form an asphalt strip onto the road surface. The asphalt material is fully mixed after being mixed by the two spiral shafts, and then smoothed and compacted by the ironing and compaction mechanism 22 to form an asphalt layer. The bottom of the transverse conveying pipe 12 is attached to the road surface to ensure a smooth transition of the asphalt strip from the transverse conveying pipe 12 to the road surface, avoiding breakage of the asphalt strip. Each spiral shaft is equipped with a drive system 15, which includes multiple independent motor drives, each corresponding to the inclined spiral shaft 13 and the transverse spiral shaft 14. The drive system 15 is controlled by the control panel to open and close. Both the transverse conveying pipe 12 and the inclined conveying pipe 11 are equipped with a heating and heat preservation system (the heating and heat preservation system is existing technology and will not be described in detail here). This system can provide heating temperature for the asphalt material in the pipe, so as to avoid hardening and non-flowing, which would affect the subsequent compaction of the ironing and compaction mechanism 22 and cause the connection between adjacent asphalt strips to be loose.

[0021] For reference Figure 1 As shown, the ironing and compaction mechanism 22 includes a connecting arm hinged to the periphery of the mixing and extrusion mechanism 5. The connecting arm is also equipped with a hydraulic device to control the raising or lowering of the connecting arm. The connecting arm is connected to an ironing plate 23, on which a vibrating part 24 is provided to form vibration compaction. The vibrating part 24 is a vibration motor. The bottom surface of the ironing plate 23 is a horizontal plane and is flush with the ground and the discharge end of the output port. The ironing and compaction mechanism 22 simultaneously flattens and vibrates multiple asphalt strips to form an asphalt layer. The cross-sectional shape of the asphalt strip is an isosceles trapezoid. Since the asphalt material is in a high-temperature plastic state, the inclined sidewalls of adjacent asphalt strips are squeezed and adhered to each other, which can eliminate the gaps caused by vertical joints. Under the action of the ironing and compaction mechanism 22, adjacent asphalt strips penetrate and bond with each other at the interface, thereby forming a complete asphalt layer.

[0022] For reference Figure 1 As shown, in order to ensure that the asphalt adheres tightly to the road surface, a road cleaning mechanism 2 is provided. The road cleaning mechanism 2 includes a scraper 3 and a cleaning roller 4. The scraper 3 is located at the front end of the cleaning roller 4. As the traveling mechanism moves, the scraper 3 pushes forward large debris on the road surface, while the cleaning roller 4 cleans the dust on the road surface.

[0023] For reference Figure 6 , Figure 7 As shown, this application also provides another drive system 15, which includes multiple sets of rotating rods 16. Each rotating rod 16 has a first bevel gear 17 at its upper end and a worm gear 18 connected to its lower end. The first bevel gear 17 meshes with the meshing gear 19 at the rotating end of the corresponding oblique spiral shaft 13, and the worm gear 18 meshes with the worm wheel 20 at the rotating end of the corresponding transverse spiral shaft 14. The rotating rods 16 rotate synchronously through the main gear drive unit 21 to realize the synchronous opening and closing of multiple sets of stirring and conveying units. The main gear drive unit 21 is equipped with a motor.

[0024] Specifically, see, for example Figure 6 , Figure 7As shown, the oblique spiral shaft 13 has a meshing gear 19 on its rotating end, and the transverse spiral shaft 14 has a worm gear 20 on its rotating end. The drive system 15 includes multiple sets of rotating rods 16, the number of which corresponds to the number of mixing and conveying units. Each rotating rod 16 has a first bevel gear 17 at its upper end and a worm gear 18 at its lower end. The first bevel gear 17 meshes with the meshing gear 19, and the worm gear 18 meshes with the worm gear 20. When the rotating rod 16 rotates, the first bevel gear 17 and the worm gear 18 rotate synchronously, causing the meshing gear 19 and the worm gear 20 to rotate synchronously, thus realizing the rotation of the oblique spiral shaft 13 and the transverse spiral shaft 14. The multiple sets of rotating rods 16 are connected to a motor through a main gear drive unit 21. The main gear drive unit 21 includes a first rotating gear in the middle of each rotating rod 16, and a second rotating gear meshes between adjacent first rotating gears to ensure that the first rotating gears rotate in one direction. The first second rotating gear is equipped with a motor to realize the synchronous rotation of the multiple sets of rotating rods 16.

[0025] Working principle: The paving equipment is moved to the road surface where the asphalt layer needs to be laid, moving unidirectionally in one direction. During the movement, the road sweeping mechanism 2 is activated first to sweep the road surface where the asphalt layer needs to be laid, reducing dust on the road surface and ensuring adhesion between the subsequent asphalt paving and the road surface. Simultaneously, the asphalt material raw material is generated into asphalt strip by the mixing and extrusion mechanism 5 and laid on the road surface. Then, the asphalt strip is flattened and vibrated and compacted into an asphalt layer by the ironing and compaction mechanism 22. This paving equipment is suitable for paving the entire road asphalt and is also suitable for various situations such as partial repair paving of asphalt.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An asphalt paving device for municipal engineering construction, characterized in that: The equipment includes a tracked walking mechanism (1), a road cleaning mechanism (2), a mixing and extrusion mechanism (5), and a smoothing and compaction mechanism (22) that are sequentially integrated along the equipment. The road cleaning mechanism (2) is located at the front end of the tracked walking mechanism (1) and cleans the road surface as the tracked walking mechanism (1) moves forward. The mixing and extrusion mechanism (5) divides the asphalt mixture into multiple portions, mixes them, and extrudes multiple asphalt strips. At the same time, the smoothing and compaction mechanism (22) starts to smooth and compact the multiple asphalt strips together to form an asphalt layer.

2. The asphalt paving equipment for municipal engineering construction according to claim 1, characterized in that: The mixing and extrusion mechanism (5) includes a material distribution section (6) and a mixing and conveying section (10). The bottom of the material distribution section (6) is connected to the mixing and conveying section (10). The material distribution section (6) is used to divide the asphalt material raw material into multiple portions and distribute them into the mixing and conveying section (10). The mixing and conveying section (10) mixes the raw material to form asphalt material and pushes the asphalt material to the output port for output.

3. The asphalt paving equipment for municipal engineering construction according to claim 2, characterized in that: The mixing and conveying unit (10) includes multiple mixing and conveying units. Each mixing and conveying unit includes an inclined conveying pipe (11) and a transverse conveying pipe (12). The inclined conveying pipe (11) and the transverse conveying pipe (12) are connected. An inclined spiral shaft (13) with the same inclination as the conveying pipe is provided in the inclined conveying pipe (11). A transverse spiral shaft (14) is provided in the transverse conveying pipe (12). The spiral shaft is equipped with a drive system (15).

4. The asphalt paving equipment for municipal engineering construction according to claim 3, characterized in that: The drive system (15) includes multiple independent motor drives, each of which corresponds to an oblique helical shaft (13) and a transverse helical shaft (14).

5. The asphalt paving equipment for municipal engineering construction according to claim 3, characterized in that: The drive system (15) includes multiple sets of rotating rods (16). Each rotating rod (16) has a first bevel gear (17) at its upper end and a worm gear (18) at its lower end. The first bevel gear (17) meshes with the meshing gear (19) at the rotating end of the corresponding oblique spiral shaft (13). The worm gear (18) meshes with the worm wheel (20) at the rotating end of the corresponding transverse spiral shaft (14). The rotating rods (16) are synchronously rotated by the main gear drive unit (21) to realize the synchronous opening and closing of multiple sets of stirring and conveying units. The main gear drive unit (21) is equipped with a motor.

6. The asphalt paving equipment for municipal engineering construction according to claim 4 or 5, characterized in that: The outlet of the transverse conveying pipe (12) is an isosceles trapezoid.

7. The asphalt paving equipment for municipal engineering construction according to claim 6, characterized in that: The material distribution section (6) includes multiple raw material cylinders (7), which are nested in multiple stages with different diameters and the same center. Each raw material cylinder (7) is provided with a uniform partition plate (8) and a corresponding discharge valve (9) at the bottom. The raw materials are evenly distributed and discharged through the uniform partition plate (8) and the discharge valve (9).

8. The asphalt paving equipment for municipal engineering construction according to claim 6, characterized in that: The ironing and compaction mechanism (22) includes a connecting arm hinged to the periphery of the stirring and extrusion mechanism (5). The connecting arm is also equipped with a hydraulic device to control the raising or lowering of the connecting arm. The connecting arm is connected to an ironing plate (23). The ironing plate (23) is provided with a vibrating part (24) to form vibration compaction. The bottom surface of the ironing plate (23) is a horizontal plane and is flush with the ground and the discharge end of the output port.

9. The asphalt paving equipment for municipal engineering construction according to claim 8, characterized in that: The road sweeping mechanism (2) includes a scraper (3) and a sweeping roller (4), with the scraper (3) located at the front end of the sweeping roller (4).

10. The asphalt paving equipment for municipal engineering construction according to claim 9, characterized in that: The stirring extrusion mechanism (5) is equipped with a heating and heat preservation system.

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