Hydraulic ring cutting type road surface breaking device adaptive to different sizes of well covers

Abstract

This application relates to the field of municipal road construction technology, and in particular to a hydraulic ring-cutting road surface demolition device that adapts to different manhole cover sizes. The device includes a frame, a power lifting assembly, a hydraulic breaker assembly, and a clamping assembly. The frame includes a fixing plate with a circular through hole on its upper surface, and two inclined supports are fixedly connected to the upper surface of the fixing plate. By setting up the hydraulic breaker assembly, this application utilizes four hydraulic telescopic rods arranged in a cross shape to drive the adjusting block, which in turn drives the breaker head to extend and retract radially. This allows for precise adaptation to various sizes of conventional municipal manhole covers, solving the problem that traditional equipment can only adapt to fixed-size manhole covers and cannot meet the needs of concentrated operations with multiple types of manhole covers in old residential areas. This significantly expands the applicability of the equipment. It achieves neat ring-cutting of the road surface around the manhole cover, resulting in a smooth cut, avoiding excessive damage and road surface cracking, reducing the workload and cost of subsequent road repair, and meeting the asphalt pavement smoothness requirements after the renovation of old residential areas.

Description

Technical Field

[0001] This application relates to the field of municipal road construction technology, and in particular to a hydraulic ring-cutting road surface demolition device that adapts to different manhole cover sizes. Background Technology

[0002] In the renovation of old residential areas and the renovation of municipal roads, the replacement of manhole covers, elevation improvement and demolition of surrounding road surfaces are key construction links. Traditional manual demolition or single-type manhole cover removal equipment can only rely on manual pneumatic picks, hydraulic breakers or simple lifting devices to complete the demolition of the road surface around the manhole cover and the removal of the manhole cover.

[0003] However, for existing old residential area renovation and municipal road renovation projects, there will be a situation where existing sewage and rainwater manhole covers and newly built communication and power manhole covers are concentrated in the same work area. In order to lay asphalt road surface later and ensure the smoothness of the road surface, sewage and rainwater manhole covers need to be lifted at the same time. During the lifting process, the original ground is uneven and the manhole cover elevations are different. This makes it difficult for traditional equipment to take into account the synchronous elevation control and regular demolition of multiple manhole covers when performing road surface demolition and manhole cover removal operations according to fixed dimensions. Therefore, an integrated manhole cover ring cutting demolition and removal device was developed.

[0004] This application provides a device for road surface demolition and integrated manhole cover removal in areas with multiple manhole covers, which achieves the purpose of regular ring-cutting demolition of road surfaces in areas with multiple manhole covers in the renovation of old residential areas, and simultaneous removal of manhole covers and surrounding concrete blocks as a whole. It solves the problems of low demolition accuracy and low efficiency of existing traditional manhole cover removal equipment that can only operate on a single manhole. Summary of the Invention

[0005] The purpose of this application is to solve at least one technical problem raised in the background art.

[0006] This application provides a hydraulic ring-cutting road surface breaking device that adapts to different manhole cover sizes, including a frame, a power lifting assembly, a hydraulic breaking blade assembly, and a clamping assembly;

[0007] The frame includes a fixed plate with a circular through hole on its upper surface. Two inclined brackets are fixedly connected to the upper surface of the fixed plate, and a support plate is fixedly connected between the two inclined brackets. A protective cover is fixedly connected to the upper surface of the support plate. The power lifting assembly includes a hydraulic push rod fixedly installed on the top wall inside the protective cover. A lifting plate is fixedly connected to the telescopic end of the hydraulic push rod. Two lifting rods are fixedly connected to the lower surface of the lifting plate, and U-shaped connecting plates are fixedly connected to the bottom ends of the two lifting rods.

[0008] The hydraulic breaker assembly includes a circular shell fixedly connected to the bottom of a U-shaped connecting plate. A rotating disk is rotatably mounted on the bottom of the circular shell. Four rectangular adjustment holes are provided on the lower surface of the rotating disk. Adjustment blocks are provided on the inner walls of the rectangular adjustment holes. A breaker head is fixedly connected to the lower surface of the adjustment blocks. Relying on the concentric positioning structure, the breaker head is driven to make a circular motion with the rotating disk, so as to achieve regular ring cutting and breaking of the road surface around the manhole cover. The cut is flat, avoiding excessive damage and road surface cracking, reducing the workload and cost of subsequent road surface repair, and meeting the flatness requirements of asphalt pavement after the renovation of old residential areas.

[0009] Preferably, a hydraulic telescopic rod is fixedly connected to the inner wall of the rectangular adjustment hole, the hydraulic telescopic rod is horizontally arranged inside the rectangular adjustment hole, a guide crossbar is fixedly connected to the inner wall of the rectangular adjustment hole, and a guide through hole matching the guide crossbar is opened on the surface of the adjustment block. The adjustment block is slidably connected to the surface of the guide crossbar through the guide through hole.

[0010] Preferably, the size of the rectangular adjustment hole matches the adjustment block, and both sides of the adjustment block are slidably connected to the inner wall of the rectangular adjustment hole. The four rectangular adjustment holes are symmetrically distributed in a cross-shaped array on the lower surface of the rotating disk.

[0011] Preferably, the clamping assembly includes a clamping block fixedly connected to the surface of the adjusting block. The surface of the clamping block is provided with several anti-slip grooves. The lower surface of the clamping block is fixedly connected with a transition block in the shape of an inverted triangle. The four clamping blocks are all set on the side surfaces of the four adjusting blocks that are close to each other. The clamping blocks are integrated into the top adjusting block of the crusher head. With the inverted triangle transition block and the anti-slip grooves, crushing and clamping are achieved simultaneously. The entire manhole cover and surrounding concrete block can be clamped and lifted without changing the tooling, simplifying the process and shortening the construction cycle. The lifting and rotation linkage control ensures precise and safe operation. The metal contact block on the surface of the lifting plate cooperates with the proximity switch inside the protective cover. When the lifting plate rises, it automatically triggers the drive motor, which drives the crusher head to rotate and shift. The crusher head can rotate a certain angle after being lifted, thereby realizing the excavation operation around the manhole cover and achieving integrated crushing and clamping.

[0012] Preferably, the upper surface of the U-shaped connecting plate is provided with a limiting shaft hole, and a rotating shaft is rotatably connected to the inner wall of the limiting shaft hole. The bottom end of the rotating shaft extends into the interior of the circular shell, and the bottom end of the rotating shaft is fixedly connected to the upper surface of the rotating disk. The rotating shaft, the circular shell, and the rotating disk are all coaxially distributed vertically.

[0013] Preferably, a drive box is fixedly connected to the upper surface of the U-shaped connecting plate, a drive motor is fixedly connected to the inner wall of the drive box, a worm is fixedly connected to the output end of the drive motor, the top end of the rotating shaft extends into the interior of the drive box and is fixedly connected to a worm wheel, the worm meshes with the worm wheel, and the end of the worm away from the drive motor extends to the inner wall of the drive box for rotatable connection.

[0014] Preferably, a metal contact block is fixedly connected to the upper surface of the lifting plate, a limit mounting plate is fixedly connected to the inner wall of the protective cover, a proximity switch is fixedly connected to the lower surface of the limit mounting plate, the position of the proximity switch corresponds to the metal contact block, and the proximity switch is located directly above the metal contact block. A return spring is sleeved on the surface of the lifting rod, the top end of the return spring is fixedly connected to the lower surface of the lifting plate, and the bottom end of the return spring is fixedly connected to the upper surface of the support plate.

[0015] Preferably, the surfaces of the lifting plate and the drive box are provided with heat dissipation components. The heat dissipation components include three corrugated air cylinders fixedly connected to the lower surface of the lifting plate, and a ventilation hood fixedly connected to one side surface of the drive box. The air outlet of the ventilation hood extends into the interior of the drive box. The bottom end of the corrugated air cylinder is fixedly connected to the upper surface of the support plate. An air guide hose is fixedly connected to the air inlet end of the ventilation hood. The end of the air guide hose away from the ventilation hood extends to the top of the support plate and is fixedly connected to a collecting air pipe. A plurality of heat exhaust holes are opened on the side surface of the drive box away from the ventilation hood. The plurality of heat exhaust holes are evenly distributed in a linear array on the surface of the drive box.

[0016] Preferably, the output end of the corrugated air cylinder is fixedly connected to an exhaust pipe, the end of the exhaust pipe away from the corrugated air cylinder is fixedly connected to the air inlet end of the collecting air pipe, a one-way exhaust valve is fixedly connected to the surface of the exhaust pipe, an air inlet pipe is fixedly connected to the air inlet end of the corrugated air cylinder, and a one-way air inlet valve is fixedly connected to the air inlet end of the air inlet pipe.

[0017] Preferably, one end of the fixing plate is fixedly connected to an assembly plate, and the surface of the assembly plate is provided with an assembly hole, through which the assembly plate is assembled and fixed to the engineering vehicle.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. The hydraulic ring-cutting road surface demolition device adapted to different manhole cover sizes described in this application, by setting up a hydraulic breaker assembly, can use four hydraulic telescopic rods distributed in a cross shape to drive the adjusting block to drive the breaker head to extend and retract radially. It can accurately adapt to various specifications of conventional municipal manhole covers, solving the problem that traditional equipment can only adapt to fixed-size manhole covers and cannot meet the problem of concentrated operation of multiple types of manhole covers in old residential areas, greatly expanding the applicable scenarios of the equipment; relying on the concentric positioning structure, in conjunction with the rotating disk to drive the breaker head to make circumferential motion, it can achieve regular ring-cutting and demolition of the road surface around the manhole cover, with a flat cut, avoiding excessive damage and road surface cracking, reducing the workload and cost of subsequent road surface repair, and meeting the asphalt pavement smoothness requirements after the renovation of old residential areas.

[0020] 2. The hydraulic ring-cutting road surface demolition device adapted to different manhole cover sizes described in this application integrates a clamping component on the surface of the hydraulic breaker assembly. The clamping block is integrated into the top adjustment block of the breaker head, and with the inverted triangular transition block and anti-slip groove, the crushing and clamping are achieved simultaneously. The manhole cover and surrounding concrete blocks can be clamped and lifted as a whole without changing tooling, simplifying the process and shortening the construction cycle. The lifting and rotation linkage control ensures precise and safe operation. The metal contact block on the surface of the lifting plate cooperates with the proximity switch inside the protective cover. When the lifting plate rises, it automatically triggers the drive motor, which drives the breaker head to rotate and shift. The breaker head can rotate a certain angle after being lifted, thereby realizing the excavation operation around the manhole cover and achieving integrated crushing and clamping.

[0021] 3. The hydraulic ring-cutting road surface breaking device that adapts to different manhole cover sizes described in this application, by setting up a heat dissipation component, can synchronously drive the corrugated air cylinder to generate airflow when the lifting plate moves up and down, and then pass it into the drive box through the air guide hose and ventilation cover. With the help of the heat exhaust hole, active heat dissipation is achieved, which avoids overheating of the drive motor and worm gear transmission structure during long-term operation, extends the service life of the core components, and is suitable for high-intensity continuous construction. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of this application;

[0023] Figure 2 This is a side view structural diagram of this application;

[0024] Figure 3 This is a schematic diagram of the rear view structure of this application;

[0025] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0026] Figure 5 This is a schematic diagram of the bottom view structure of the fixing plate in this application;

[0027] Figure 6 for Figure 5 Enlarged structural diagram at point B;

[0028] Figure 7 This is a schematic diagram of the internal structure of the driver box in this application;

[0029] Figure 8 This is a schematic diagram of the heat dissipation component structure of this application;

[0030] Figure 9 This is a bottom view of the rotating disk structure of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Frame; 2. Power lifting assembly; 3. Hydraulic breaker assembly; 4. Clamping assembly; 5. Heat dissipation assembly;

[0033] 101. Fixing plate; 102. Support plate; 103. Protective cover; 104. Circular through hole; 105. Assembly plate;

[0034] 201. Hydraulic push rod; 202. Lifting plate; 203. Lifting rod; 204. U-shaped connecting plate; 205. Rotating shaft; 206. Drive box; 207. Drive motor; 208. Worm gear; 209. Worm wheel; 210. Metal contact block; 211. Limit mounting plate; 212. Proximity switch; 213. Return spring;

[0035] 301. Circular shell; 302. Rectangular adjustment hole; 303. Adjustment block; 304. Crusher head; 305. Hydraulic telescopic rod; 306. Guide crossbar; 310. Rotary disc;

[0036] 401. Clamping block; 402. Anti-slip groove; 403. Transition block;

[0037] 501. Corrugated air cylinder; 502. Ventilation hood; 503. Air guide hose; 504. Heat exhaust hole; 505. Exhaust pipe; 506. One-way exhaust valve; 507. Air inlet pipe; 508. One-way air inlet valve; 509. Air collection pipe. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1 To be continued Figure 9 To further describe this application, a hydraulic ring-cutting road surface breaking device that adapts to different manhole cover sizes is provided, comprising a frame 1, a power lifting assembly 2, a hydraulic breaking blade assembly 3, a clamping assembly 4, and a heat dissipation assembly 5.

[0039] The frame 1 includes a fixing plate 101, which is horizontally arranged and has a circular through hole 104 in the middle. Two inclined brackets are symmetrically fixed on the upper surface of the fixing plate 101, forming a stable triangular support structure and improving the overall rigidity. A protective cover 103 is fixed to the upper surface of the support plate 102. An assembly plate 105 is fixed to one end of the fixing plate 101. The assembly plate 105 has multiple assembly holes, which can be quickly assembled and fixed with small engineering vehicles such as excavators, enabling the device to enter narrow roads and uneven ground in old residential areas.

[0040] The power lifting assembly 2 includes a hydraulic push rod 201, which is fixed at the center of the inner top wall of the protective cover 103. Its telescopic end points vertically downward and fixes the lifting plate 202, providing stable power for vertical movement. Two lifting rods 203 are symmetrically fixed to the lower surface of the lifting plate 202. The lifting rods 203 vertically pass through the support plate 102, and their bottom ends are jointly fixed to a U-shaped connecting plate 204. A return spring 213 is sleeved on the surface of the lifting rod 203. The top end of the return spring 213 abuts against the lower surface of the lifting plate 202, and the bottom end abuts against the upper surface of the support plate 102, assisting the lifting plate 202 to quickly return to its original position when the hydraulic push rod 201 retracts.

[0041] A metal contact block 210 is fixed to the upper surface of the lifting plate 202, and a limit mounting plate 211 is fixed to the inner wall of the protective cover 103. A proximity switch 212 is fixed to the lower surface of the limit mounting plate 211. The proximity switch 212 is located directly above the metal contact block 210, and the two are positioned correspondingly. A PLC controller electrically connected to the proximity switch 212 and the drive motor 207 is installed inside the protective cover 103. When the lifting plate 202 rises to the set position, the metal contact block 210 triggers the proximity switch 212. The proximity switch 212 immediately sends a signal. The PLC controller receives the signal and controls the drive motor 207 to rotate by a preset angle, so that the rotating disk 310 drives the crushing head 304 to rotate by a preset angle, completing the automatic adjustment of the head position without manual intervention, and realizing the linkage control of lifting and rotation.

[0042] A drive box 206 is fixed to the upper surface of the U-shaped connecting plate 204. A drive motor 207 is fixed inside the drive box 206, and a worm gear 208 is fixed to the output end of the drive motor 207. A limiting shaft hole is opened in the center of the U-shaped connecting plate 204. A rotating shaft 205 is rotatably connected in the limiting shaft hole. The top end of the rotating shaft 205 extends into the drive box 206 and fixes a worm wheel 209. The worm wheel 209 and the worm gear 208 mesh with each other. The rotating shaft 205, the circular shell 301, and the rotating disk 310 are coaxially distributed to ensure that the breaker head 304 moves stably around the center of the manhole cover, breaking the cross-section neatly and avoiding excessive damage to the surrounding road surface.

[0043] The hydraulic crusher assembly 3 is located at the bottom of the device and includes a circular shell 301. The circular shell 301 is fixed to the bottom end of the U-shaped connecting plate 204. A rotating disk 310 is rotatably mounted at the bottom end of the circular shell 301. The rotating disk 310 rotates synchronously with the rotating shaft 205. Four rectangular adjustment holes 302 are provided on the lower surface of the rotating disk 310. The four rectangular adjustment holes 302 are symmetrically distributed in a cross-shaped array, ensuring uniform force distribution and synchronous adjustment, thus guaranteeing the stability of crushing and clamping. The size of the rotating disk 310 matches the circular through hole 104.

[0044] Each rectangular adjusting hole 302 has a horizontally fixed hydraulic telescopic rod 305 inside. An adjusting block 303 is fixed to the telescopic end of the hydraulic telescopic rod 305. The adjusting block 303 slides smoothly against the inner wall of the rectangular adjusting hole 302, ensuring smooth and unobstructed movement. A guide crossbar 306 is also fixed to the inner wall of the rectangular adjusting hole 302. The adjusting block 303 has a guide through hole that matches the guide crossbar 306. The adjusting block 303 slides along the guide crossbar 306 through the guide through hole, achieving radial guidance. A crushing head 304 is fixed to the lower surface of the adjusting block 303. The crushing head 304 is made of hard alloy material, which has high hardness and good wear resistance, suitable for breaking up hard surfaces such as concrete and asphalt. By driving the adjusting block 303 to extend and retract radially through the hydraulic telescopic rod 305, the working radius of the crushing head 304 can be adjusted, adapting to conventional municipal manhole covers from 600mm to 900mm. This solves the problem of traditional equipment only being able to adapt to fixed sizes and having poor versatility, meeting the needs of centralized operation for various types of manhole covers such as sewage, rainwater, communication, and power manholes in old residential areas.

[0045] The clamping component 4 is integrated into the hydraulic breaker assembly 3, achieving integrated breaking and clamping. It includes a clamping block 401, which is fixed to the adjacent surface of the adjusting blocks 303, located on top of the breaker head 304. It moves radially synchronously with the adjusting blocks 303, requiring no additional drive mechanism, resulting in a compact structure and synchronized operation. Multiple anti-slip grooves 402 are formed on the surface of the clamping block 401 to increase friction with the edge of the manhole cover and prevent slippage during lifting. An inverted triangular transition block 403 is fixed to the lower surface of the clamping block 401. The transition block 403 facilitates insertion into the gap between the manhole cover and the road surface, and together with the anti-slip grooves 402, achieves stable clamping of the manhole cover. This allows for synchronous lifting of the manhole cover and surrounding concrete blocks, avoiding forced lifting that could cause road surface cracking, reducing subsequent repair work, and improving work quality.

[0046] The heat dissipation component 5 utilizes lifting motion to achieve self-driven heat dissipation, including three corrugated air cylinders 501. The three corrugated air cylinders 501 are evenly distributed on the lower surface of the lifting plate 202, and their bottom ends are fixed to the upper surface of the support plate 102.

[0047] The corrugated air cylinder 501 has an inlet end connected to an inlet pipe 507 and a one-way inlet valve 508, and an outlet end connected to an exhaust pipe 505 and a one-way exhaust valve 506, ensuring unidirectional airflow. The exhaust pipe 505 collects air into a collecting pipe 509, and then connects to a ventilation hood 502 via a flexible air guide hose 503. The ventilation hood 502 is fixed to one side of the drive box 206, and its outlet extends into the drive box 206. Multiple heat dissipation holes 504 arranged in a linear array are provided on the other side of the drive box 206. Each up-and-down movement of the lifting plate 202 pushes the corrugated air cylinder 501 to generate airflow. This airflow continuously flows into the drive box 206, quickly dissipating the heat generated by the drive motor 207, worm gear 208, and worm wheel 209, preventing overheating failure during prolonged continuous operation and extending the service life of core components.

[0048] The working principle of this embodiment is as follows: Before operation, the device is assembled and fixed to a small engineering vehicle through the assembly plate 105, and moved to the top of the manhole cover to be operated, so that the circular through hole 104 of the fixing plate 101 is initially aligned with the manhole cover.

[0049] During operation, the hydraulic push rod 201 is activated, which pushes the lifting plate 202, lifting rod 203, and U-shaped connecting plate 204 downwards. This, in turn, drives the rotating disk 310 and the crushing cutter head 304 vertically downwards, allowing the crushing cutter head 304 to insert into the ground around the manhole cover, completing one vertical breaking feed. During this process, the corrugated air cylinder 501 is compressed, and the internal air is sent to the drive box 206 through the one-way exhaust valve 506, exhaust pipe 505, air collection pipe 509, air guide hose 503, and ventilation hood 502. This forces air cooling of the drive motor 207 and transmission mechanism, and the heat is discharged from the heat dissipation hole 504, achieving self-heating.

[0050] After a single cutting feed is completed, the hydraulic push rod 201 retracts, and with the assistance of the return spring 213, the lifting plate 202 quickly returns to its original position. When the lifting plate 202 rises to the set height, the metal contact block 210 approaches and triggers the proximity switch 212. The proximity switch 212 sends a start signal to the drive motor 207, and the drive motor 207 rotates at a preset angle. Through the worm gear 208, worm wheel 209, and rotating shaft 205, it drives the rotating disk 310 to rotate by a corresponding angle, causing the crushing cutter head 304 to shift around the center of the manhole cover, preparing for the next insertion and cutting.

[0051] Repeat the above-mentioned vertical insertion breaking, rising reset and rotation adjustment cycle. The 304 crushing head is inserted point by point and moved step by step, and finally completes a continuous breaking around the manhole cover, so that the manhole cover is completely separated from the surrounding road surface and forms a regular circular cut. This avoids the excessive damage to the road surface and the problem of irregular cross-section caused by traditional milling methods, and meets the flatness requirements of asphalt pavement after the renovation of old residential areas.

[0052] After the road surface around the manhole cover is completely removed, the hydraulic telescopic rod 305 retracts, causing the adjusting block 303 and the clamping block 401 to converge towards the center. The transition insert 403 is inserted into the edge gap of the manhole cover, and the anti-slip groove 402 tightly grips the manhole cover, achieving stable clamping. Subsequently, the hydraulic push rod 201 continues to retract, causing the clamping assembly 4 and the manhole cover to be lifted upwards as a whole, simultaneously removing the manhole cover and the surrounding concrete blocks.

Claims

1. A hydraulic ring-cutting road surface breaking device that adapts to different manhole cover sizes, characterized in that, It includes a frame (1), a power lifting assembly (2), a hydraulic crusher assembly (3), and a clamping assembly (4); The frame (1) includes a fixed plate (101), the upper surface of which is provided with a circular through hole (104), and two inclined brackets are fixedly connected to the upper surface of the fixed plate (101). A support plate (102) is fixedly connected between the two inclined brackets. A protective cover (103) is fixedly connected to the upper surface of the support plate (102). The power lifting assembly (2) includes a hydraulic push rod (201) fixedly installed on the inner top wall of the protective cover (103). A lifting plate (202) is fixedly connected to the telescopic end of the hydraulic push rod (201). Two lifting rods (203) are fixedly connected to the lower surface of the lifting plate (202). A U-shaped connecting plate (204) is fixedly connected to the bottom end of the two lifting rods (203). The hydraulic crusher assembly (3) includes a circular shell (301) fixedly connected to the bottom of the U-shaped connecting plate (204). A rotating disk (310) is rotatably provided at the bottom of the circular shell (301). Four rectangular adjustment holes (302) are provided on the lower surface of the rotating disk (310). An adjustment block (303) is provided on the inner wall of the rectangular adjustment hole (302). A crusher head (304) is fixedly connected to the lower surface of the adjustment block (303).

2. The hydraulic ring-cutting road surface breaking device for adaptive manhole cover sizes according to claim 1, characterized in that, A hydraulic telescopic rod (305) is fixedly connected to the inner wall of the rectangular adjustment hole (302). The hydraulic telescopic rod (305) is horizontally arranged inside the rectangular adjustment hole (302). A guide crossbar (306) is fixedly connected to the inner wall of the rectangular adjustment hole (302). A guide through hole matching the guide crossbar (306) is opened on the surface of the adjustment block (303). The adjustment block (303) is slidably connected to the surface of the guide crossbar (306) through the guide through hole.

3. The hydraulic ring-cutting road surface breaking device adaptable to different manhole cover sizes according to claim 2, characterized in that, The size of the rectangular adjustment hole (302) matches that of the adjustment block (303). Both sides of the adjustment block (303) are slidably connected to the inner wall of the rectangular adjustment hole (302). The four rectangular adjustment holes (302) are symmetrically distributed in a cross-shaped array on the lower surface of the rotating disk (310).

4. The hydraulic ring-cutting road surface breaking device adapting to different manhole cover sizes according to claim 3, characterized in that, The clamping assembly (4) includes a clamping block (401) fixedly connected to the surface of the adjusting block (303). The surface of the clamping block (401) is provided with a plurality of anti-slip grooves (402). The lower surface of the clamping block (401) is fixedly connected with a transition block (403) in the shape of an inverted triangle. All four clamping blocks (401) are provided on the side surface of the four adjusting blocks (303) that are close to each other.

5. A hydraulic ring-cutting road surface breaking device adaptable to different manhole cover sizes according to claim 4, characterized in that, The upper surface of the U-shaped connecting plate (204) is provided with a limiting shaft hole, and a rotating shaft (205) is rotatably connected to the inner wall of the limiting shaft hole. The bottom end of the rotating shaft (205) extends into the interior of the circular shell (301), and the bottom end of the rotating shaft (205) is fixedly connected to the upper surface of the rotating disk (310). The rotating shaft (205), the circular shell (301) and the rotating disk (310) are all coaxially distributed.

6. The hydraulic ring-cutting road surface breaking device for adaptive manhole cover sizes according to claim 5, characterized in that, A drive box (206) is fixedly connected to the upper surface of the U-shaped connecting plate (204). A drive motor (207) is fixedly connected to the inner wall of the drive box (206). A worm (208) is fixedly connected to the output end of the drive motor (207). The top end of the rotating shaft (205) extends into the interior of the drive box (206) and is fixedly connected to a worm wheel (209). The worm (208) meshes with the worm wheel (209). The end of the worm (208) away from the drive motor (207) extends to the inner wall of the drive box (206) for rotational connection.

7. A hydraulic ring-cutting road surface breaking device adaptable to different manhole cover sizes according to claim 6, characterized in that, A metal contact block (210) is fixedly connected to the upper surface of the lifting plate (202). A limit mounting plate (211) is fixedly connected to the inner wall of the protective cover (103). A proximity switch (212) is fixedly connected to the lower surface of the limit mounting plate (211). The position of the proximity switch (212) corresponds to that of the metal contact block (210), and the proximity switch (212) is located directly above the metal contact block (210). A return spring (213) is sleeved on the surface of the lifting rod (203). The top end of the return spring (213) is fixedly connected to the lower surface of the lifting plate (202), and the bottom end of the return spring (213) is fixedly connected to the upper surface of the support plate (102).

8. A hydraulic ring-cutting road surface breaking device adaptable to different manhole cover sizes according to claim 7, characterized in that, The surfaces of the lifting plate (202) and the drive box (206) are provided with heat dissipation components (5). The heat dissipation components (5) include three corrugated air cylinders (501) fixedly connected to the lower surface of the lifting plate (202) and a ventilation hood (502) fixedly connected to one side surface of the drive box (206). The air outlet of the ventilation hood (502) extends into the interior of the drive box (206). The bottom end of the corrugated air cylinder (501) is fixed to the upper surface of the support plate (102). The ventilation hood (502) is connected to an air inlet hose (503). The end of the air inlet hose (503) away from the ventilation hood (502) extends to the top of the support plate (102) and is connected to a collecting air pipe (509). The drive box (206) has several heat exhaust holes (504) on the side surface away from the ventilation hood (502). The heat exhaust holes (504) are evenly distributed in a linear array on the surface of the drive box (206).

9. A hydraulic ring-cutting road surface breaking device adaptable to different manhole cover sizes according to claim 8, characterized in that, The output end of the corrugated air cylinder (501) is fixedly connected to an exhaust pipe (505). The end of the exhaust pipe (505) away from the corrugated air cylinder (501) is fixedly connected to the air inlet end of the collecting air pipe (509). A one-way exhaust valve (506) is fixedly connected to the surface of the exhaust pipe (505). An air inlet pipe (507) is fixedly connected to the air inlet end of the corrugated air cylinder (501). A one-way air inlet valve (508) is fixedly connected to the air inlet end of the air inlet pipe (507).

10. A hydraulic ring-cutting road surface breaking device adaptable to different manhole cover sizes according to claim 1, characterized in that, One end of the fixing plate (101) is fixedly connected to the assembly plate (105). The surface of the assembly plate (105) is provided with assembly holes, and the assembly plate (105) is assembled and fixed with the engineering vehicle through the assembly holes.

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