Rapid and accurate breaking device and method for urban pipeline reconstruction pavement structure layer

Abstract

The invention relates to the technical field of pavement breaking devices, in particular to a rapid and accurate breaking device and method for an urban pipeline reconstruction pavement structure layer. Comprising a breaking part used for breaking a pavement structure layer, and the breaking part comprises a plurality of guide assemblies detachably connected with a crushing machine head and a crushing cone connected with the crushing machine head; the limiting part is used for limiting the moving area of the breaking part and comprises a plurality of limiting baffles, the limiting baffles define a limiting interval, the lower portions of the limiting baffles are folded to form tips, the upper portions of the limiting baffles are bent towards the interior of the limiting interval to form a limiting part, and when the breaking part operates, the limiting part is located in the limiting interval. And the limiting part is in contact with the guide assembly. The limiting interval defined by the limiting baffles is tightly attached to the first guide roller on the guide plate, the movement track of the crushing cone is strictly restrained, and the crushing boundary error is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of road surface breaking devices, and in particular to a device and method for quickly and accurately breaking a road surface structure layer for urban pipeline reconstruction. Background Art

[0002] In road construction and municipal maintenance, traditional pavement structural layer removal relies primarily on manual labor or large excavators. The former is inefficient and difficult to control in terms of precision, while the latter is prone to over-excavation and uneven edges due to equipment vibration. This is particularly effective for detailed removal of areas that need to be preserved (such as pipelines and curbs). Furthermore, the vibrations from the crushing process are easily transmitted to surrounding structures, causing secondary cracks or damage. Furthermore, existing crushing cones are susceptible to reaction forces, leading to rigid failure between the breaker hammer and the crusher head. Therefore, a crushing device that can define the removal boundary, cushion the impact, and improve precision is urgently needed. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a device and method for quickly and accurately breaking the pavement structure layer of urban pipeline reconstruction.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a device for quickly and accurately breaking the pavement structure layer of urban pipeline reconstruction, comprising a breaking part for breaking the pavement structure layer, the breaking part comprising a plurality of guide assemblies detachably connected to a crushing head and a crushing cone connected to the crushing head, a connecting cavity being defined inside the crushing cone, a connecting end of the crushing head being slidably connected to the connecting cavity, the interior of the connecting cavity being filled with a buffer, a through pipe being provided between the bottom and the bottom of the connecting cavity, the buffer being used to cushion the movement of the crushing head, and the through pipe being provided with a locking valve; The limiting part is used to limit the moving area of ​​the breaking part, and includes a plurality of limiting baffles. The plurality of limiting baffles are gathered together to form a limiting interval. The lower part of the limiting baffle is gathered into a pointed end, and the upper part of the limiting baffle is bent toward the inside of the limiting interval to form a limiting part. When the breaking part is in operation, the limiting part contacts the guide assembly.

[0005] As an optimization, the side wall of the connecting end is in contact and sealed with the side wall of the connecting cavity, the connecting end divides the connecting cavity into an upper buffer cavity and a lower buffer cavity, and the through pipe is connected between the upper buffer cavity and the lower buffer cavity; When the locking valve is opened, the connecting end and the crushing cone can slide relative to each other, and when the locking valve is closed, the connecting section and the crushing cone are rigidly connected.

[0006] As an optimization, a limiting groove is provided on the side of the crusher head, and the guide assembly includes a limiting plate and several guide plates, the guide plate is fixedly connected to the limiting plate, and the limiting plate is fixedly connected to the limiting groove, and the lower part of the guide plate is gathered toward the direction of the crushing cone to form a guide part, the outer side of the guide part is rotatably connected to a vertically arranged first guide roller, and the inner side of the guide part is rotatably connected to a horizontally arranged second guide roller.

[0007] As an optimization, a connection hole is opened on the outer side of the end of the limit baffle, and a connection block is detachably connected between the connection holes of two adjacent limit baffles.

[0008] As an optimization, a reinforcing rib is provided between the upper portion of the guide plate and the lower portion of the guide portion; The lower portion of the guide plate is located inside the limiting portion, and the limiting portion is arranged opposite to the first guide roller inside and outside.

[0009] As an optimization, the crushing cone is square, the guide assembly is located outside the side surface of the crushing cone, and the lower part of the guide assembly is parallel to the side surface of the crushing cone.

[0010] As an optimization, the lower end of the guide assembly is higher than the bottom of the crushing cone, and the height difference between the bottom of the guide assembly and the crushing cone is not less than the upper and lower buffer ranges when the crushing cone is in operation.

[0011] A method for accurately breaking a pavement structure layer specifically comprises the following steps: According to construction requirements, limit grooves are opened along the edge of the area to be demolished, and limit baffles are laid in the limit grooves in sequence to form a limit interval surrounded by the limit baffles; By operating the crushing part within the limit interval, the guide assembly contacts and fits with the limit part, and the crushing part moves along the limit part to achieve precise crushing.

[0012] The beneficial effects of this program are as follows: The limiting interval formed by the limiting baffle is closely fitted with the first guide roller on the guide plate, and the moving trajectory of the crushing cone is strictly constrained, effectively reducing the crushing boundary error; A buffer solution is filled between the crushing cone and the machine head. The impact force is dispersed through the upper and lower buffer chambers, which greatly reduces vibration and avoids damage to the surrounding matrix and rigidity damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the axial side of the present invention in use.

[0014] Figure 2 This is a schematic diagram of the main view of the present invention in use.

[0015] Figure 3This is a schematic diagram of the axial side of the present invention with part of the shaft removed.

[0016] Figure 4 This is a partially removed schematic diagram of the present invention.

[0017] Figure 5 For the present invention Figure 4 AA cross-section structure diagram.

[0018] Among them, 1. Crushing cone, 2. Limiting plate, 3. Guide plate, 4. First guide roller, 5. Second guide roller, 6. Connecting hole, 7. Connecting block, 8. Reinforcement rib, 9. Connecting end, 10. Upper buffer chamber, 11. Lower buffer chamber, 12. Crusher head, 13. Through pipe, 14. Locking valve, 15. Limiting baffle, 16. Limiting part. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 5 As shown, a device for quickly and accurately breaking the pavement structure layer of urban pipeline reconstruction includes a breaking part for breaking the pavement structure layer. The breaking part includes a plurality of guide assemblies detachably connected to a crushing head 12 and a crushing cone 1 connected to the crushing head 12. A connecting cavity is defined inside the crushing cone 1. The connecting end 9 of the crushing head 12 is slidably connected to the connecting cavity. The interior of the connecting cavity is filled with a buffer. A through pipe 13 is provided between the bottom and the bottom of the connecting cavity. The buffer is used to cushion the movement of the crushing head 12. The through pipe 13 is equipped with a locking valve 14. The limiting portion 16 is used to limit the moving area of ​​the breaking part, and includes several limiting baffles 15. Several limiting baffles 15 are surrounded to form a limiting interval. The lower part of the limiting baffle 15 is gathered into a pointed end, and the upper part of the limiting baffle 15 is bent toward the inside of the limiting interval to form the limiting portion 16. When the breaking part is in operation, the limiting portion 16 contacts the guide assembly.

[0020] The limit baffle 15 is stamped and formed from high-strength alloy steel (such as Q345B). The standard size of a single baffle is 0.55m (length) × 0.3m (height), with a thickness of 8-20mm. The bottom tip has an angle of 30° to reduce insertion resistance.

[0021] A wear-resistant ceramic coating (Al2O3 content ≥ 95%) is added to the inner wall of the limit baffle 15 to reduce the friction coefficient with the guide roller to below 0.15, extending the service life by more than 3 times.

[0022] The buffer can be HVLP-46 anti-wear hydraulic oil. The through pipe 13 has a built-in throttle valve with an adjustable aperture range of 2-8mm. The electromagnetic lock valve 14 is remotely controlled and has a response time of less than 0.5s.

[0023] like Figure 5As shown, the side wall of the connecting end 9 is in contact and sealed with the side wall of the connecting cavity. The connecting end 9 divides the connecting cavity into an upper buffer cavity 10 and a lower buffer cavity 11. The through pipe 13 is connected between the upper buffer cavity 10 and the lower buffer cavity 11. When the locking valve 14 is opened, the connecting end 9 and the crushing cone 1 can slide relative to each other. When the locking valve 14 is closed, the connecting section and the crushing cone 1 are rigidly connected.

[0024] The connecting cavity adopts a stepped sealing design, the cavity wall is hard chrome-plated (thickness 50μm), and it is equipped with a nitrile rubber sealing ring to ensure zero leakage of buffer solution.

[0025] like Figure 5 As shown, a limiting groove is provided on the side of the crushing head 12, and the guide assembly includes a limiting plate 2 and several guide plates 3. The guide plate 3 is fixedly connected to the limiting plate 2, and the limiting plate 2 is fixedly connected to the limiting groove. The lower part of the guide plate 3 is retracted toward the direction of the crushing cone 1 to form a guide part, and the outer side of the guide part is rotatably connected to a vertically arranged first guide roller 4, and the inner side of the guide part is rotatably connected to a horizontally arranged second guide roller 5.

[0026] The first guide roller 4 adopts a double-row tapered roller bearing with a pressure bearing capacity of 20kN; the second guide roller 5 is a nylon-coated roller to reduce the collision noise with the crushing cone 1.

[0027] The first guide roller 4 contacts the limiting portion 16 , and the second guide roller 5 contacts the crushing cone 1 .

[0028] like Figure 1 As shown, a connection hole 6 is opened on the outer side of the end of the limit baffle 15, and a connection block 7 is detachably connected between the connection holes 6 of two adjacent limit baffles 15.

[0029] Two adjacent limiting baffles 15 are connected by the connecting block 7 so that the limiting baffles 15 are connected to form a continuous protective wall.

[0030] like Figure 2 As shown, a reinforcing rib 8 is provided between the upper portion of the guide plate 3 and the lower portion of the guide portion; The lower portion of the guide plate 3 is located inside the limiting portion 16 , and the limiting portion 16 and the first guide roller 4 are arranged opposite to each other inside and outside.

[0031] like Figure 1 As shown, the crushing cone 1 is square, the guide assembly is located outside the side of the crushing cone 1, and the lower part of the guide assembly is parallel to the side of the crushing cone 1.

[0032] The lower end of the guide assembly is higher than the bottom of the crushing cone 1 , and the height difference between the bottom of the guide assembly and the crushing cone 1 is not less than the upper and lower buffer ranges of the crushing cone 1 during operation.

[0033] A method for accurately breaking a pavement structure layer specifically comprises the following steps: According to the construction requirements, a limit groove is opened along the edge of the area to be demolished, and the limit baffles 15 are laid in the limit grooves in sequence, and the limit interval is formed by the limit baffles 15; Use a double-disc cutting machine to cut to a depth of +5cm from the bottom of the structural layer (if the asphalt layer is 10cm thick, cut to a depth of 15cm), and inject water simultaneously to suppress dust; lay a 20mm thick medium sand cushion layer at the bottom of the trench to ensure that the tip of the baffle is evenly stressed after being embedded.

[0034] By operating the crushing part within the limit interval, the guide assembly contacts and fits with the limit portion 16, and the crushing part moves along the limit portion 16 to achieve precise crushing.

[0035] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any device and method for quickly and accurately breaking the pavement structure layer of an urban pipeline renovation that complies with the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in the corresponding technical field shall fall within the patent protection scope of the present invention.

Claims

1. A device for quickly and accurately breaking the pavement structure layer of urban pipeline reconstruction, characterized by: The invention comprises a breaking part for breaking a pavement structure layer, wherein the breaking part comprises a plurality of guide assemblies detachably connected to a crushing head (12) and a crushing cone (1) connected to the crushing head (12); a connecting cavity is provided inside the crushing cone (1); a connecting end (9) of the crushing head (12) is slidably connected to the connecting cavity; a buffer is filled inside the connecting cavity; a through pipe (13) is provided between the bottom of the connecting cavity and the bottom; the buffer is used to buffer the movement of the crushing head (12); and the through pipe (13) is provided with a locking valve (14); The limiting portion (16) is used to limit the moving area of ​​the breaking portion, and includes a plurality of limiting baffles (15). The plurality of limiting baffles (15) are surrounded to form a limiting interval. The lower portion of the limiting baffle (15) is gathered to form a pointed end, and the upper portion of the limiting baffle (15) is bent toward the inside of the limiting interval to form the limiting portion (16). When the breaking portion is in operation, the limiting portion (16) contacts the guide assembly.

2. The device for rapidly and accurately breaking the pavement structure layer of urban pipeline reconstruction according to claim 1 is characterized in that: The side wall of the connecting end (9) is in contact and sealed with the side wall of the connecting cavity. The connecting end (9) separates the connecting cavity into an upper buffer cavity (10) and a lower buffer cavity (11). The through pipe (13) is connected between the upper buffer cavity (10) and the lower buffer cavity (11). When the locking valve (14) is opened, the connecting end (9) and the crushing cone (1) can slide relative to each other; when the locking valve (14) is closed, the connecting section and the crushing cone (1) are rigidly connected.

3. The rapid and precise breaking device for urban pipeline reconstruction pavement structure layer according to claim 1 is characterized by: A limiting groove is provided on the side of the crusher head (12), and the guide assembly includes a limiting plate (2) and a plurality of guide plates (3). The guide plate (3) is fixedly connected to the limiting plate (2), and the limiting plate (2) is fixedly connected to the limiting groove. The lower part of the guide plate (3) is retracted toward the crushing cone (1) to form a guide portion. The outer side of the guide portion is rotatably connected to a first guide roller (4) arranged vertically, and the inner side of the guide portion is rotatably connected to a second guide roller (5) arranged horizontally.

4. The rapid and precise breaking device for urban pipeline reconstruction pavement structure layer according to claim 1 is characterized by: A connecting hole (6) is provided on the outer side of the end of the position-limiting baffle (15), and a connecting block (7) is detachably connected between the connecting holes (6) of two adjacent position-limiting baffles (15).

5. The device for rapidly and accurately breaking the pavement structure layer for urban pipeline reconstruction according to claim 3 is characterized by: A reinforcing rib (8) is provided between the upper portion of the guide plate (3) and the lower portion of the guide portion; The lower portion of the guide plate (3) is located inside the limiting portion (16), and the limiting portion (16) and the first guide roller (4) are arranged opposite to each other inside and outside.

6. The device for rapidly and accurately breaking the pavement structure layer for urban pipeline reconstruction according to claim 1 is characterized in that: The crushing cone (1) is square, the guide assembly is located outside the side of the crushing cone (1), and the lower part of the guide assembly is parallel to the side of the crushing cone (1).

7. According to a device for quickly and accurately breaking the pavement structure layer of an urban pipeline reconstruction according to claim 6, the lower end of the guide assembly is higher than the bottom of the crushing cone (1), and the height difference between the bottom of the guide assembly and the crushing cone (1) is not less than the upper and lower buffer range of the crushing cone (1) during operation.

8. A method for accurately breaking a pavement structure layer, characterized by: The breaking device according to any one of claims 1 to 7 specifically comprises the following steps: According to the construction requirements, a limit groove is opened along the edge of the area to be demolished, and the limit baffles (15) are laid in the limit grooves in sequence, and the limit interval is formed by the limit baffles (15); By the crushing part operating within the limit interval, the guide assembly contacts and fits with the limit part (16), and the crushing part moves along the limit part (16), thereby achieving precise crushing.

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