An asphalt laying device for a manhole cover

Abstract

The application discloses a kind of asphalt laying devices of manhole cover periphery;Including support frame, rotating part, driving part and paving assembly, the support frame is used to support the rotating part and driving part, both ends of the rotating part are rotatably connected with the support frame, the driving part is connected with the rotating part, for driving the rotating part relative to the support frame rotation, the paving assembly is connected with the rotating part, the paving assembly rotates with the rotating part, for laying asphalt in the periphery of manhole cover.By driving the rotating part to rotate with driving part, make paving assembly rotate around the four around manhole cover, paving assembly can evenly lay asphalt in the periphery of manhole cover when rotating, so as to improve the uniformity of manhole cover periphery asphalt laying.Improve the efficiency and quality of manhole cover periphery asphalt laying.

Description

Technical Field

[0001] This invention relates to the field of asphalt paving equipment technology, and more particularly to an asphalt paving equipment for the perimeter of a manhole cover. Background Technology

[0002] Currently, with the improvement of highway standards, the quality requirements for asphalt pavement are also getting higher and higher. Although the drainage design of the road surface is also gradually improving, the appearance of drainage wells is still inevitable.

[0003] There are two methods for paving asphalt around manhole covers. One method involves paving and compacting the asphalt first, then excavating around the manhole cover, adjusting, and then manually paving and compacting again. This method is prone to wasting materials and labor, and reducing the appearance of the road surface. The other method involves using temporary manhole covers during the entire road construction process, making multiple adjustments, and finally ensuring the quality of the road surface. This method is prone to reducing the construction efficiency at the manhole cover and affecting the construction progress.

[0004] Therefore, the low construction quality and efficiency of asphalt paving around manhole covers in the existing technology is a technical problem that those skilled in the art need to solve. Summary of the Invention

[0005] The main technical problem solved by this invention is to provide an asphalt paving device around manhole covers, thereby addressing the issues of low construction quality and efficiency in asphalt paving around manhole covers.

[0006] To solve the above-mentioned technical problems, one technical solution adopted by the present invention is to provide an asphalt paving device around a manhole cover, including a support frame, a rotating component, a driving component, and a paving assembly. The support frame is used to support the rotating component and the driving component. The two ends of the rotating component are rotatably connected to the support frame. The driving component is connected to the rotating component and is used to drive the rotating component to rotate relative to the support frame. The paving assembly is connected to the rotating component and rotates with the rotating component to pave asphalt around the manhole cover.

[0007] Preferably, the support frame includes a ring component, an intermediate component, and a support assembly. The support assembly is connected to the ring component and the intermediate component to support the ring component and the intermediate component. The ring component is adapted to the shape of the manhole cover. The ring component is used to rotatably connect to the rotating component. The intermediate component is used to fixably connect to the driving component.

[0008] Preferably, the support assembly includes a support leg, the upper end of which is connected to the end of the intermediate member. The support leg has a hollow structure, and a connecting block that can slide relative to the support leg is provided inside the support leg. The connecting block is connected to a caster, and the connection between the connecting block and the caster is a connecting part. A sliding hole adapted to the connecting part is provided vertically on the outer side of the support leg, and the connecting part can slide up and down in the sliding hole. A first screw is screwed onto the connecting block, the lower end of which is screwed onto the connecting block, and the upper end of which passes through the end of the intermediate member and is screwed onto the end of the intermediate member.

[0009] Preferably, the paving assembly includes a hopper, a spiral blade, and a driver. The spiral blade is disposed at the lower part of the hopper. One end of the spiral blade is rotatably connected to the outside of the hopper via a bearing. The other end of the spiral blade extends from the inside of the hopper and is connected to the output shaft of the driver. The driver is fixed to the inside of the hopper.

[0010] Preferably, the paving assembly is disposed on one side of the rotating member, and a first compaction assembly is disposed on the other side of the rotating member. The first compaction assembly includes an adjustable telescopic member, a vibrating member for generating vibration, and a compaction plate. The fixed end of the telescopic member is connected to the rotating member, the free end of the telescopic member is connected to the vibrating member, and the vibrating member is connected to the compaction plate, driving the compaction plate to vibrate; the vibration of the compaction plate is used to compact asphalt.

[0011] Preferably, a second compaction component is further provided on the rotating member inside the first compaction component, and the structure of the second compaction component is the same as that of the first compaction component.

[0012] Preferably, the hopper includes a first discharge port on the outer side and a second discharge port on the inner side, the height of the second discharge port is higher than the height of the first discharge port, and the height of the pressure plate of the second compaction component is higher than the height of the pressure plate of the first compaction component.

[0013] Preferably, a first slider and a second slider are respectively provided on the inner walls of the inner and outer sides of the hopper, and a first groove and a second groove adapted to the first slider and the second slider are respectively provided on the rotating component; the first slider and the second slider can slide along the first groove and the second groove respectively; a first fixing block is provided on the rotating component between the first slider and the second slider, and a second screw passes through the first slider, the second slider and the first fixing block; the outer end of the second screw is screwed to the second slider, and the inner end of the second screw is screwed to the first slider; the middle part of the second screw is rotatably connected to the first fixing block through a bearing.

[0014] Preferably, a second fixed block and a third fixed block are provided on the rotating part on the upper side of the first compaction component and the second compaction component, respectively. A third screw passes through the second fixed block and the third fixed block, and the inner end of the third screw is rotatably connected to the second fixed block. The outer end of the third screw is rotatably connected to the third fixed block. A third slider and a fourth slider are screwed to the third screw. A third sliding groove and a fourth sliding groove adapted to the third slider and the fourth slider are respectively provided on the rotating part. The third slider and the fourth slider can slide along the third sliding groove and the fourth sliding groove respectively. The first compaction component and the second compaction component are respectively fixed to the lower ends of the third slider and the fourth slider.

[0015] Preferably, pressure sensors are respectively provided at the upper ends of the first compaction component and the second compaction component to detect the reverse force received by the first compaction component and the second compaction component during compaction.

[0016] The beneficial effects of this invention are: by driving the rotating component to rotate, the paving assembly rotates around the manhole cover. When rotating, the paving assembly can evenly spread asphalt around the manhole cover, thereby improving the uniformity of asphalt paving around the manhole cover. This improves the efficiency and quality of asphalt paving around the manhole cover. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram according to an embodiment of the present invention;

[0018] Figure 2 This is a front view structural schematic diagram according to an embodiment of the present invention;

[0019] Figure 3 This is a top view of the structure according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a support component according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the rotating component and its connecting structure according to an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the structure of a rotating component according to an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the structure of a paving component according to an embodiment of the present invention;

[0024] Figure 8 This is a top view of a paving assembly according to an embodiment of the present invention;

[0025] Figure 9This is a schematic diagram of a process used according to an embodiment of the present invention;

[0026] Figure 10 This is a structural block diagram used according to an embodiment of the present invention. Detailed Implementation

[0027] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0028] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0029] Figures 1-8 An embodiment of the asphalt paving device around the manhole cover of the present invention is shown, including a support frame 10, a rotating component 20, a driving component 30, and a paving assembly 40. The support frame 10 supports the rotating component 20 and the driving component 30. The two ends of the rotating component 20 are rotatably connected to the support frame 10. The driving component 30 is connected to the rotating component 20 and is used to drive the rotating component 20 to rotate relative to the support frame 10. The paving assembly 40 is connected to the rotating component 20 and rotates with the rotating component 20 to pave asphalt around the manhole cover.

[0030] The driving component 30 drives the rotating component 20 to rotate, causing the paving assembly 40 to rotate around the manhole cover. As the paving assembly 40 rotates, it evenly spreads asphalt around the manhole cover, thereby improving the uniformity of asphalt paving around the manhole cover and increasing the efficiency and quality of asphalt paving around the manhole cover.

[0031] Preferably, the rotating member 20 is rod-shaped, and rollers 201 are respectively provided at both ends of the rotating member 20. The rollers 201 rotate along the annular member 101 of the support frame 10, so that the rotating member 20 is rotatably connected to the support frame 10.

[0032] Preferably, the support frame 10 includes a ring 101, an intermediate part 102 and a support assembly 103. The support assembly 103 is connected to the ring 101 and the intermediate part 102 and is used to support the ring 101 and the intermediate part 102. The ring 101 is used to rotatably connect to the rotating part 20, and the intermediate part 102 is used to fixably connect to the driving part 30.

[0033] Preferably, the annular component 101 is adapted to the shape of the manhole cover. Rollers 201 at both ends of the rotating component 20 roll along the annular component 101, causing the rotating component 20 to be rotatably connected to the annular component 101. The rollers 201 can be disposed on the upper surface of the annular component 101. Preferably, the annular component 101 is a ring-shaped U-shaped channel steel, and the rollers 201 roll within the U-shaped channel steel, thereby ensuring the stability of the rotatable connection between the rotating component 20 and the annular component 101.

[0034] The intermediate component 102 can be in the shape of a trident or a cross, and is composed of trident or cross-shaped beams. Depending on the different shapes of the intermediate component 102, the intermediate component 102 has a different number of ends. The number of support components 103 corresponds to the number of ends of the intermediate component 102. For example, when it is trident-shaped, there can be three support components 103, which support the three ends of the intermediate component 102 respectively.

[0035] Preferably, the intermediate component 102 is cross-shaped and includes four crossbeams. Four corresponding support components 103 are provided to support the four ends of the intermediate component 102 respectively.

[0036] Preferably, the four ends of the intermediate member 102 are respectively fixed to the upper ends of the four support components 103, the four support components 103 are evenly surrounded on the outside of the ring member 101, the ring member 101 is fixed on the inner side of the four support components 103, and the ring member 101 is located on the lower side of the intermediate member 102.

[0037] Preferably, the support assembly 103 includes a support leg 1031, the upper end of which is connected to the end of the intermediate member 102.

[0038] Preferably, the lower end of the support leg 1031 is connected to a caster, which facilitates the movement of the support frame 10.

[0039] Preferably, the caster includes two swivel wheels 1032 and two track wheels 1033, thereby facilitating walking and turning.

[0040] Furthermore, the height of the support leg 1031 is adjustable. The support leg 1031 can be an electrically operated telescopic rod, a hydraulically operated telescopic rod, or other similar structures.

[0041] Preferably, the support leg 1031 has a hollow structure, and a connecting block 1034 that can slide relative to the support leg 1031 is provided inside the support leg 1031. The connecting block 1034 is connected to the caster, and the connection between the connecting block 1034 and the caster is a connecting part 1035. The connecting part 1035 can be the fixing plate of the swivel wheel 1032 or the rotating shaft of the traveling wheel 1033. The outer side of the support leg 1031 is provided with a sliding hole 1036 in the vertical direction that is adapted to the connecting part 1035, and the connecting part 1035 can slide up and down in the sliding hole 1036. A first screw 1037 is screwed onto the connecting block 1034. The lower end of the first screw 1037 is screwed onto the connecting block 1034, and the upper end of the first screw 1037 passes through the end of the intermediate member 102 and is screwed onto the end of the intermediate member 102. A nut is provided at the upward extension of the upper end of the first screw 1037 to facilitate rotation of the first screw 1037 and prevent the first screw 1037 from slipping out of the end of the intermediate member 102. A bearing can be provided at the connection between the first screw 1037 and the intermediate member 102. The external thread of the first screw 1037 is fixedly connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the end of the intermediate member 102. This limits the position of the first screw 1037, preventing it from moving up and down and allowing only rotation. Thus, when the first screw 1037 is rotated, the rotation of the first screw 1037 can drive the connecting block 1034 to move up and down, thereby adjusting the position of the caster relative to the support leg 1031. The height of the support leg 1031 can then be adjusted. When the caster is at the upper end of the sliding hole 1036, the lower end of the support leg 1031 contacts the ground for support. When the caster is at the lower end of the sliding hole 1036, the lower end of the support leg 1031 is off the ground, and the support is provided by the caster itself. This allows the caster to contact the ground when moving the support frame 10, facilitating its movement. When asphalt needs to be laid, the support leg 1031 contacts the ground to ensure stability during asphalt laying and prevent the support frame 10 from moving.

[0042] The drive component 30 is a motor, hydraulic motor, etc., preferably a variable frequency motor.

[0043] The drive component 30 is fixed at the center of the intermediate component 102, located on the upper side of the intermediate component 102. The output shaft of the drive component 30 passes through the intermediate component 102 and connects to the rotating component 20. A bearing can be installed at the center of the intermediate component 102, and the outer surface of the output shaft of the drive component 30 is connected to the inner ring of the bearing to ensure the stability of the output shaft during rotation. The lower end of the output shaft passes through the intermediate component 102 and is fixedly connected to the rotating component 20, driving the rotating component 20 to rotate relative to the support frame 10.

[0044] The paving component 40 may only have a hopper 401, and asphalt is manually added to the hopper 401, which is rather inconvenient.

[0045] Preferably, the paving assembly 40 includes a hopper 401, a spiral blade 402, and a driver 403. The spiral blade 402 is disposed at the lower part of the hopper 401. One end of the spiral blade 402 is rotatably connected to the outside of the hopper 401 via a bearing, and the other end of the spiral blade 402 extends out from the inside of the hopper 401 and is connected to the output shaft of the driver 403. The driver 403 is fixed to the inside of the hopper 401. The output shaft of the driver 403 drives the spiral blade 402 to rotate. The rotation of the spiral blade 402 causes the asphalt in the hopper 401 to be squeezed out from the outlet of the hopper 401.

[0046] The driver 403 can be an electric motor, a hydraulic motor, or a combination of a speed reducer, etc.

[0047] The paving component 40 can evenly spread asphalt around the manhole cover, thereby improving the uniformity of asphalt paving around the manhole cover. This improves the efficiency and quality of asphalt paving around the manhole cover. After the asphalt is laid by the paving component 40, it needs to be compacted. In the existing technology, compaction is usually done manually or with a vibratory machine. Manual compaction is difficult to achieve sufficient compaction and the quality is poor. Compacting with a vibratory machine requires an additional vibratory machine, which is costly and not convenient for integrated asphalt paving.

[0048] To address the aforementioned issues, the paving assembly 40 is further provided on one side of the rotating component 20, and a first compaction assembly 50 is provided on the other side of the rotating component 20. The first compaction assembly 50 is used to compact the asphalt laid by the paving assembly 40.

[0049] The first compaction component 50 includes an adjustable telescopic member 501, a vibrating member 502 for generating vibration, and a compaction plate 503. The fixed end of the telescopic member 501 is connected to the rotating member 20, and the free end of the telescopic member 501 is connected to the vibrating member 502. The vibrating member 502 is connected to the compaction plate 503, causing the compaction plate 503 to vibrate. The vibration of the compaction plate 503 is used to compact the asphalt laid by the paving component 40.

[0050] The telescopic component 501 can be an electric telescopic rod, a pneumatic cylinder, etc., preferably a pneumatic cylinder.

[0051] The vibrating element 502 can be an electromagnetic vibrator, an air vibrator, etc., with an air vibrator being preferred.

[0052] The pressure plate 503 includes a base plate, and the base plate has side edges extending upward around its perimeter to prevent asphalt from falling onto the base plate.

[0053] The outer side of the base plate extends downward to form a partition 5031, which is used to separate excess asphalt around the manhole cover, making it easier to clean up the excess asphalt.

[0054] Furthermore, a second compaction component 60 is also provided on the rotating part 20 inside the first compaction component 50. The structure of the second compaction component 60 is the same as that of the first compaction component 50. The second compaction component 60 can increase the compaction area and improve the compaction efficiency.

[0055] In summary, by integrating the first compaction component 50 and the paving component 40 within the frame, after the asphalt is laid around the manhole cover using the paving component 40, the support frame 10 does not need to be moved. The first and second compaction components 50 and 60 can be activated directly. Since the coverage area of ​​the cross-sections of the first and second compaction components 50 and 60 is the same as the width of the cross-section laid by the paving component 40, the laid asphalt can be accurately compacted using the first and second compaction components 50 and 60, preventing vibration from impacting the manhole cover or the surrounding roadside. This also improves compaction efficiency and convenience.

[0056] Preferably, the hopper 401 includes an outer first discharge port 4011 and an inner second discharge port 4012. The height of the second discharge port 4012 is higher than the height of the first discharge port 4011, and the height of the pressure plate of the second compaction component 60 is higher than the height of the pressure plate 503 of the first compaction component 50. The first compaction component 50 compacts the asphalt extruded from the first discharge port 4011, and the second compaction component 60 compacts the asphalt extruded from the second discharge port 4012. This allows the asphalt around the manhole cover to form a stepped shape during asphalt compaction, with the outermost asphalt height lower than the innermost asphalt height. When laying asphalt on the road surface, this facilitates better bonding between the asphalt on the road surface and the asphalt around the manhole cover, ensuring the smoothness and strength of the asphalt around the manhole cover and the road surface asphalt.

[0057] The heights of the first discharge port 4011 and the second discharge port 4012, as well as the corresponding pressure plates 503 of the first compaction component 50 and 60 of the second compaction component 60, can also be set at a certain angle. When the manhole cover needs to be slightly lower than the road surface, the first discharge port 4011 can be tilted inwards, higher than the second discharge port 4012. When the manhole cover needs to be slightly higher than the road surface, the first discharge port 4011 can be tilted outwards, lower than the second discharge port 4012. The pressure plates 503 of the first compaction component 50 and 60 of the second compaction component 60 are set so that the first discharge port 4011 is higher than the second discharge port 4012. This allows for the laying of asphalt around the manhole cover according to different usage environments.

[0058] Furthermore, the position of the paving assembly 40 is adjustable. A first slider 404 and a second slider 405 are respectively provided on the inner walls of the inner and outer sides of the hopper 401. A first groove 202 and a second groove 203, adapted to the first slider 404 and the second slider 405, are respectively provided on the rotating component 20. The first slider 404 and the second slider 405 can slide along the first groove 202 and the second groove 203, respectively. A first fixing block 204 is provided on the rotating component 20 between the first slider 404 and the second slider 405. A second screw 406 passes through the first slider 404, the second slider 405, and the first fixing block 204. The outer end of the second screw 406 is screwed to the second slider 405, and the inner end of the second screw 406 is screwed to the first slider 404. A nut extends inward from the inner end of the second screw 406 to facilitate rotation of the second screw 406. The middle part of the second screw 406 is rotatably connected to the first fixing block 204 via a bearing. The external thread in the middle of the second screw 406 is fixedly connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the center hole of the first fixing block 204.

[0059] When the second screw 406 rotates, its position cannot be changed due to the fixed connection between its external thread and the inner ring of the bearing; it can only rotate. This rotation causes the first slider 404 and the second slider 405, which are screwed to the second screw 406, to slide along the first groove 202 and the second groove 203, respectively. This changes the position of the hopper 401, which is fixedly connected to the first slider 404 and the second slider 405. This allows adjustment of the distance between the hopper 401 and the center of the intermediate component 102, enabling the paving assembly 40 to be suitable for different sizes of manhole covers when laying asphalt.

[0060] Furthermore, the positions of the first compaction component 50 and the second compaction component 60 are adjustable. On the rotating part 20 above the first compaction component 50 and the second compaction component 60, there are opposing second fixing blocks 207 and third fixing blocks 208. A third screw 504 passes through between the second fixing blocks 207 and the third fixing blocks 208. The inner end of the third screw 504 is rotatably connected to the second fixing block 207 via a bearing, and a nut extends inward to facilitate the rotation of the third screw 504. The outer end of the third screw 504 is rotatably connected to the third fixing block 208 via a bearing. A third slider 505 and a fourth slider 506 are screwed onto the third screw 504. The rotating part 20 is respectively provided with a third sliding groove 205 and a fourth sliding groove 206 adapted to the third slider 505 and the fourth slider 506. The third slider 505 and the fourth slider 506 can slide along the third sliding groove 205 and the fourth sliding groove 206, respectively. The first compaction component 50 and the second compaction component 60 are respectively fixed to the lower ends of the third slider 505 and the fourth slider 506.

[0061] The external threads at both ends of the third screw 504 are fixedly connected to the inner rings of the bearings, and the outer rings of the bearings are fixedly connected to the center holes of the second fixing block 207 and the third fixing block 208, respectively. When the third screw 504 rotates, its position cannot change due to the fixed connection between the external threads at both ends and the inner rings of the bearings; it can only rotate. The rotation of the third screw 504 causes the third slider 505 and the fourth slider 506, which are screwed to the third screw 504, to slide along the third slide groove 205 and the fourth slide groove 206, respectively. The positions of the first compaction component 50 and the second compaction component 60, which are fixedly connected to the third slider 505 and the fourth slider 506 respectively, can be changed. This allows adjustment of the distance between the positions of the first compaction component 50 and the second compaction component 60 and the center of the intermediate component 102, thereby enabling the first compaction component 50 and the second compaction component 60 to compact the asphalt laid by the paving component 40. The positions of the first compaction component 50 and the second compaction component 60 can be changed accordingly as the position of the paving component 40 changes.

[0062] Furthermore, pressure sensors (not shown in the figure) are respectively installed at the upper ends of the first compaction component 50 and the second compaction component 60. These pressure sensors detect the reverse force experienced by the first compaction component 50 or the second compaction component 60 during compaction. That is, when the vibrating element 502 vibrates, the upper end of the first compaction component 50 or the second compaction component 60 will also experience a force, which is the reverse force. The pressure sensors are connected to the controller of the first compaction component 50 or the second compaction component 60. The controller adjusts the extension length of the telescopic element 501 according to this reverse force, ensuring that the pressure plate 503 always contacts the laid asphalt, thus ensuring effective vibration compaction.

[0063] Therefore, this invention discloses an asphalt paving device around a manhole cover. A driving component drives a rotating component to rotate, causing the paving assembly to rotate around the manhole cover. During rotation, the paving assembly evenly spreads asphalt around the manhole cover, thus improving the uniformity of the asphalt paving around the manhole cover. After the asphalt paving is completed, a first compaction component and a second compaction component compact the paved asphalt, thereby improving the efficiency and quality of asphalt paving and compaction around the manhole cover.

[0064] Methods for laying asphalt around manhole covers using a laying device, such as... Figure 9 and Figure 10 As shown, the steps include:

[0065] Step S1: Move the laying device directly above the manhole cover, aligning the center of the laying device with the center of the manhole cover;

[0066] Step S2: Add asphalt into the paving component in the paving device, start the paving component and drive unit in the paving device, the drive unit drives the paving component to rotate, and the paving component surrounds the asphalt around the manhole cover.

[0067] Step S3: Start the first compaction component in the paving device. The first compaction component compacts the asphalt laid by the paving component, thus completing the paving of asphalt around the manhole cover.

[0068] The above method allows for the even distribution of asphalt around the manhole cover, thus improving the uniformity of the asphalt distribution. After the asphalt is laid, the first and second compaction components are used to compact the asphalt, thereby improving the efficiency and quality of asphalt compaction around the manhole cover.

[0069] Furthermore, the laying device is moved directly above the manhole cover by its casters, and then secured in position by its support legs. This ensures the stability of the laying device during asphalt laying.

[0070] Furthermore, when initially targeting a manhole cover of a certain size, the position of the paving assembly can be adjusted so that asphalt is laid close to the manhole cover. The positions of the first and second compaction assemblies can then be adjusted so that their coverage aligns with the asphalt placement by the paving assembly. Subsequent times targeting the same size manhole cover, only the center of the asphalt laying device needs to be aligned with the center of the manhole cover; the position of the paving assembly does not need to be adjusted.

[0071] When adjusting the paving assembly, ensure that the inner edge of the paving assembly and the second compaction assembly is 3mm-10mm away from the outer edge of the manhole cover. Preferably, 5mm.

[0072] Once the location of the paving device is determined, the paving assembly is started first to lay asphalt. After the asphalt is laid, the first compaction assembly and the second compaction assembly are started to compact the asphalt.

[0073] Furthermore, the asphalt extruded from the paving assembly is stepped, and the hopper includes an outer first discharge port and an inner second discharge port, the height of which is higher than that of the first discharge port; the height of the pressure plate of the second compaction assembly is higher than that of the pressure plate of the first compaction assembly. This creates a stepped asphalt pattern around the manhole cover, with the outermost asphalt height lower than the innermost asphalt height. When laying asphalt on the road surface, this facilitates a better connection between the asphalt on the road surface and the asphalt around the manhole cover, ensuring the smoothness and strength of both the asphalt around the manhole cover and the road surface asphalt.

[0074] Furthermore, the reverse force of the first compaction component and / or the second compaction component is obtained. When the vibrator vibrates, there will also be a force at the upper end of the first compaction component or the second compaction component. This force is the reverse force. The extension length of the telescopic component in the first compaction component and / or the second compaction component is adjusted according to the reverse force so that the pressure plate of the first compaction component and / or the second compaction component always abuts against the upper surface of the asphalt.

[0075] Preferably, a minimum threshold for the reverse force is set. When the detected reverse force is less than this minimum threshold, the telescopic component extends and the pressure plate moves downward until the reverse force exceeds the minimum threshold, indicating that the pressure plate is tightly pressed against the upper side of the asphalt. Vibration can then continue to compact the asphalt.

[0076] Preferably, a maximum threshold for the reverse force is set. When the detected reverse force exceeds this minimum threshold, the expansion joint shortens, and the pressure plate moves upward until the reverse force is less than the maximum threshold, indicating that the pressure plate is firmly against the upper side of the asphalt. Vibration can then continue to compact the asphalt. The purpose of setting the maximum threshold is also to prevent the expansion joint from elongating excessively, thus avoiding wasted power consumption or damage to the expansion joint due to excessive load.

[0077] Therefore, the above method can evenly spread asphalt around the manhole cover, thereby improving the uniformity of asphalt paving around the manhole cover. After the asphalt is laid, the first and second compaction components are used to compact the laid asphalt, thereby improving the efficiency and quality of asphalt compaction around the manhole cover.

[0078] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. An asphalt paving device around a manhole cover, characterized in that, The device includes a support frame, a rotating component, a driving component, and a paving assembly. The support frame supports the rotating component and the driving component. Both ends of the rotating component are rotatably connected to the support frame. The driving component is connected to the rotating component and drives the rotating component to rotate relative to the support frame. The paving assembly is connected to the rotating component and rotates with the rotating component to lay asphalt around the perimeter of the manhole cover. The paving assembly includes a hopper, a spiral blade, and a driver. The spiral blade is disposed at the lower part of the hopper. One end of the spiral blade is rotatably connected to the outside of the hopper via a bearing. The other end of the spiral blade extends from the inside of the hopper and is connected to the output shaft of the driver. The driver is fixed to the inside of the hopper. The paving assembly is disposed on one side of the rotating component, and a first compaction assembly is disposed on the other side of the rotating component. The first compaction assembly includes an adjustable telescopic component, a vibrating component for generating vibration, and a compaction plate. The fixed end of the telescopic component is connected to the rotating component, and the free end of the telescopic component is connected to the vibrating component. The vibrating component is connected to the compaction plate and drives the compaction plate to vibrate. The vibration of the compaction plate is used to compact asphalt.

2. The asphalt paving device around the manhole cover according to claim 1, characterized in that, The support frame includes a ring component, an intermediate component, and a support assembly. The support assembly is connected to the ring component and the intermediate component to support the ring component and the intermediate component. The ring component is adapted to the shape of the manhole cover. The ring component is used to rotatably connect to the rotating component. The intermediate component is used to fixably connect to the driving component.

3. The asphalt paving device around the manhole cover according to claim 2, characterized in that, The support assembly includes a support leg, the upper end of which is connected to the end of the intermediate component. The support leg is hollow and has a connecting block that can slide relative to it. The connecting block is connected to a caster, and the connection between the connecting block and the caster is a connecting part. The outer side of the support leg has a sliding hole that matches the connecting part in a vertical direction, and the connecting part can slide up and down in the sliding hole. A first screw is screwed onto the connecting block. The lower end of the first screw is screwed onto the connecting block, and the upper end of the first screw passes through the end of the intermediate component and is screwed onto the end of the intermediate component.

4. The asphalt paving device around the manhole cover according to claim 1, characterized in that, A second compaction component is also provided on the rotating member inside the first compaction component, and the structure of the second compaction component is the same as that of the first compaction component.

5. The asphalt paving device around the manhole cover according to claim 4, characterized in that, The hopper includes a first discharge port on the outer side and a second discharge port on the inner side. The height of the second discharge port is higher than the height of the first discharge port. The height of the pressure plate of the second compaction component is higher than the height of the pressure plate of the first compaction component.

6. The asphalt paving device around the manhole cover according to claim 1, characterized in that, The inner walls of the inner and outer sides of the hopper are respectively provided with a first slider and a second slider. The rotating component is respectively provided with a first groove and a second groove adapted to the first slider and the second slider. The first slider and the second slider can slide along the first groove and the second groove respectively. A first fixing block is provided on the rotating component between the first slider and the second slider. A second screw passes through the first slider, the second slider and the first fixing block. The outer end of the second screw is screwed to the second slider and the inner end of the second screw is screwed to the first slider. The middle part of the second screw is rotatably connected to the first fixing block through a bearing.

7. The asphalt paving device around the manhole cover according to claim 5, characterized in that: The rotating parts on the upper sides of the first and second compaction components are provided with opposing second and third fixed blocks. A third screw passes through the second and third fixed blocks, with its inner end rotatably connected to the second fixed block and its outer end rotatably connected to the third fixed block. The third screw is screwed to a third slider and a fourth slider. The rotating parts are respectively provided with a third groove and a fourth groove adapted to the third and fourth sliders. The third and fourth sliders can slide along the third groove and the fourth groove, respectively. The first and second compaction components are respectively fixed to the lower ends of the third and fourth sliders.

8. The asphalt paving device around the manhole cover according to claim 5, characterized in that, Pressure sensors are respectively provided at the upper ends of the first compaction component and the second compaction component to detect the reverse force received by the first compaction component and the second compaction component during compaction.

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