Water jet demolition device and demolition method therefor

Abstract

The present application belongs to the technical field of viaduct renovation, and discloses a water jet demolition device and a demolition method therefor. The device comprises a main structure, an auxiliary support structure, a nozzle structure, and a control structure. The main structure is movably arranged on a road surface on an inner side of an anti-collision wall, and the auxiliary support structure is arranged on the side of the main structure close to the anti-collision wall. By means of extension and retraction of a linear drive mechanism, a support rod is driven to rotate, such that an auxiliary support wheel abuts against the ground. The nozzle structure comprises a mounting base and a nozzle. The mounting base is movably arranged at an end portion of the main structure, and the nozzle is rotatably arranged on the mounting base. The control structure is arranged on the main structure and is capable of controlling movement of the main structure, movement of the mounting base, as well as rotation and start and stop of the nozzle.

Description

A water jet demolition device and its demolition method

[0001] This application claims priority to Chinese Patent Application No. 202411708425.8, filed with the Chinese Patent Office on November 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of elevated bridge renovation technology, for example to a water jet demolition device and its demolition method. Background Technology

[0003] With the rapid development of highway construction, more and more elevated roads in my country need renovation and maintenance. As an important component of elevated bridges, crash barriers ensure the safety of vehicles traveling on them. Aging crash barriers need to be removed and replaced in a timely manner.

[0004] Among related technologies, waterjet robots are widely used because they can remove only the surface concrete without damaging the overall structure and surface reinforcement. However, their use requires prior road closure, typically necessitating the closure of an entire lane, thus occupying a significant amount of space. Furthermore, the lack of guidance systems poses a high safety risk when working at heights or near edges. Summary of the Invention

[0005] This application provides a water jet demolition device and a demolition method thereof. The device is small in size and can be applied to narrow construction sites. It will not affect normal road traffic during the renovation of elevated bridges. Furthermore, the device can reduce the danger of high-altitude edge construction.

[0006] In a first aspect, this application provides a water jet demolition device, comprising:

[0007] The main structure is movably installed on the road surface inside the crash barrier;

[0008] An auxiliary support structure is provided on the side of the main structure near the crash barrier. The auxiliary support structure includes a linear drive mechanism, a support rod, and an auxiliary support wheel. The fixed end of the linear drive mechanism is provided on the main structure. One end of the support rod is hinged to the main structure, and the other end of the support rod is hinged to the output end of the linear drive mechanism. The auxiliary support wheel is provided on the side of the support rod facing the road surface.

[0009] The nozzle structure includes a mounting base and a nozzle, wherein the mounting base is movably disposed at the end of the main structure and the nozzle is rotatably disposed on the mounting base;

[0010] A control structure, disposed on the main structure, is capable of controlling the movement of the main structure, the movement of the mounting base, and the rotation and start / stop of the nozzle.

[0011] As an optional solution for the water jet demolition equipment, a movable structure is provided between the main structure and the mounting base, the movable structure comprising:

[0012] The first rack extends horizontally and is fixed to the main structure;

[0013] A sliding plate is slidably disposed on the main structure in the horizontal direction;

[0014] A first driving mechanism is fixedly mounted on the sliding plate, and a first gear is provided at the output end of the first driving mechanism, which meshes with the first rack.

[0015] The second rack extends vertically and is fixed to the sliding plate;

[0016] The second drive mechanism is fixed on the mounting base, and the output end of the second drive mechanism is provided with a second gear, which meshes with the second rack.

[0017] As an optional solution for the waterjet demolition equipment, the moving structure further includes a guide assembly, which comprises:

[0018] The first guide rail extends horizontally and is disposed on the main structure, and is arranged parallel to the first rack at intervals;

[0019] Multiple first guide wheels are spaced apart on the sliding plate, and each first guide wheel slides along the first guide rail against the main structure;

[0020] The second guide rail extends vertically and is disposed on the sliding plate, and is arranged parallel to the second rack at intervals. The mounting base has a groove on the side facing the sliding plate, and the second guide rail is slidably engaged in the groove.

[0021] As an optional solution for the water jet demolition equipment, the water jet demolition equipment also includes a protective cover net, which is installed on the outside of the nozzle structure and the moving structure, and is detachably mounted on the main structure.

[0022] As an optional solution for the water jet demolition equipment, a rotating structure is provided between the mounting base and the nozzle, the rotating structure comprising:

[0023] The third drive mechanism is fixed on the mounting base;

[0024] An eccentric wheel shaft is connected to the output end of the third drive mechanism and is rotatably mounted on the mounting base;

[0025] The nozzle holder has a strip-shaped hole at one end, one end of the eccentric wheel shaft can be slidably extended into the strip-shaped hole, and the other end of the eccentric wheel shaft is rotatably mounted on the mounting base in a horizontal direction; the nozzle is mounted on the nozzle holder.

[0026] As an optional solution for water jet demolition equipment, the main structure includes a chassis and multiple drive wheels spaced apart on the bottom side of the chassis. Each drive wheel is provided with a corresponding fourth drive mechanism, which is fixed on the chassis. The drive wheel is connected to the output end of the corresponding fourth drive mechanism.

[0027] As an optional solution for the water jet demolition equipment, the main structure also includes multiple driven wheels, with multiple driving wheels located at one end of the chassis and multiple driven wheels located at the other end of the chassis.

[0028] As an optional solution for water jet demolition equipment, each driven wheel is provided with an elastic shock absorber between itself and the chassis.

[0029] As an optional solution for water jet demolition equipment, a counterweight is provided on the side of the main structure facing the road surface.

[0030] Secondly, this application provides a demolition method using the aforementioned water jet demolition equipment, comprising:

[0031] Identify the demolition area and plan the movement path of the nozzles;

[0032] Place the main structure on the road surface inside the demolition area, and adjust the linear drive mechanism so that the auxiliary support wheel abuts against the road surface;

[0033] The control structure controls the movement of the main structure, the mounting base, and the rotation and start / stop of the nozzles according to the planned movement path, thus completing the demolition. Attached Figure Description

[0034] Figure 1 is a schematic diagram of the overall structure of the water jet demolition equipment provided in the specific embodiments of this application;

[0035] Figure 2 is a front view of the water jet demolition device provided in the specific embodiment of this application;

[0036] Figure 3 is a schematic diagram of the main structure provided in the specific embodiments of this application;

[0037] Figure 4 is a schematic diagram of the nozzle structure, moving structure and rotating structure provided in the specific embodiments of this application.

[0038] In the diagram: 1. Main structure; 11. Chassis; 12. Drive wheel; 121. Fourth drive mechanism; 122. First mounting bracket; 13. Driven wheel; 131. Elastic shock absorber; 132. Second mounting bracket; 2. Auxiliary support structure; 21. Linear drive mechanism; 22. Support rod; 23. Auxiliary support wheel; 24. Mounting component; 3. Nozzle structure; 31. Mounting seat; 311. Slide groove; 32. Nozzle; 33. Stop; 4. Control structure; 5. Moving structure; 51. First rack; 52. Sliding plate; 53. First drive mechanism; 54. Second rack; 55. Second drive mechanism; 56. Guide assembly; 561. First guide rail; 562. First guide wheel; 563. Second guide rail; 6. Rotating structure; 61. Third drive mechanism; 62. Eccentric wheel shaft; 63. Nozzle holder; 631. Strip hole; 7. Connecting structure. Detailed Implementation

[0039] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0042] The technical solution of this application will be described below with reference to the accompanying drawings and specific embodiments.

[0043] As shown in Figures 1 to 4, this embodiment provides a water jet demolition device, which is configured to demolish the crash barrier on an overpass. The equipment includes a main structure 1, an auxiliary support structure 2, a nozzle structure 3, and a control structure 4. The main structure 1 is movably installed on the road surface inside the crash barrier (i.e., the main structure 1 is installed on the road surface inside the demolition area). The auxiliary support structure 2 is installed on the side of the main structure 1 closest to the crash barrier. The auxiliary support structure 2 includes a linear drive mechanism 21, a support rod 22, and an auxiliary support wheel 23. The fixed end of the linear drive mechanism 21 is installed on the main structure 1. One end of the support rod 22 is hinged to the main structure 1, and the other end is hinged to the output end of the linear drive mechanism 21. The auxiliary support wheel 23 is installed on the side of the support rod 22 facing the road surface. Through the extension and retraction of the linear drive mechanism 21, the support rod 22 is driven to rotate, so that the auxiliary support wheel 23 installed on the support rod 22 can abut against the ground to provide anti-tipping support for the main structure 1, avoid the equipment from tipping over due to the reaction force of the water flow, ensure the stability of the equipment during the overall movement process, and reduce the danger of high-altitude edge construction. The nozzle structure 3 includes a mounting base 31 and a nozzle 32. The mounting base 31 is movably mounted at the end of the main structure 1, and the nozzle 32 is rotatably mounted on the mounting base 31 to achieve multi-angle demolition of the crash barrier. A control structure 4 is mounted on the main structure 1 and can control the movement of the main structure 1, the movement of the mounting base 31, and the rotation and start / stop of the nozzle 32, enabling intelligent operation for efficient and rapid demolition. Furthermore, the equipment is compact and occupies little space, allowing it to be used in narrow construction sites and ensuring that the renovation of the viaduct crash barrier does not affect normal road traffic.

[0044] For example, in this embodiment, two auxiliary support structures 2 are provided; in other embodiments, the number of auxiliary support structures 2 can be set as needed, and is not limited here. In addition, the linear drive mechanism 21 is a hydraulic rod, which has the characteristics of being lightweight, small in size, and fast in response.

[0045] In practical applications, there is a height difference between the driving lane on the elevated bridge surface and the bottom surface of the crash barrier. The driving lane is at a higher position than the bottom surface of the crash barrier. Therefore, when the support rod 22 is in a horizontal state, the auxiliary support wheel 23 is at a higher position than the bottom of the main structure 1. Furthermore, driven by the linear drive mechanism 21, the auxiliary support wheel 23 can move along the area of ​​the demolition zone except for the base of the crash barrier, making it suitable for demolition operations of crash barriers with different height differences from the road surface, thus demonstrating good applicability.

[0046] For example, control structure 4 includes an equipment control cabinet, which houses an engine, hydraulic station, hydraulic valves, and a programmable logic controller (PLC). The PLC provides power to the entire equipment and controls the equipment. A touchscreen and an emergency stop button are also installed on the outer wall. Operators can operate the equipment by clicking the touchscreen; in case of an emergency, pressing the emergency stop button will interrupt the equipment's operation, ensuring safety during construction. Furthermore, the equipment is equipped with a remote control for remote operation, further enhancing operator safety. For example, the engine, hydraulic station, PLC, touchscreen, emergency stop button, and remote control are all devices already disclosed in related technologies. The PLC has relevant control programs programmed into it, and its structure and control programs are based on related technologies and will not be described in detail here.

[0047] In addition, in this embodiment, one end of the linear drive mechanism 21 is hinged to the outer wall of the control structure 4; in other embodiments, the linear drive mechanism 21 may also be directly hinged to the outer wall of the main structure 1.

[0048] For example, referring to FIG1, the chassis 11 is further provided with a connecting structure 7 for connecting with the nozzle structure 3 to facilitate the installation of the nozzle structure 3. The connecting structure 7 includes a connecting frame, a connecting plate and a plurality of reinforcing plates. The connecting frame is fixed on the chassis 11, and the connecting plate is located at the end of the connecting frame away from the chassis 11. The connecting plate is configured to install the nozzle structure 3. Each reinforcing plate is connected between the connecting frame and the connecting plate to improve the stability between the connecting frame and the connecting plate and ensure the overall strength of the connecting structure 7.

[0049] For example, the device also includes a back-end system, which includes a high-pressure pump station and a power supply system. The high-pressure pump station is connected to the nozzle 32 via a high-pressure water pipe to deliver high-pressure water to the nozzle 32. The power supply system is connected to the control structure 4 via a cable to provide power for the operation of the device, thereby ensuring the smooth progress of the demolition operation.

[0050] For example, the backend can be placed in a non-construction area far away from the equipment to reduce the space occupied in the construction area and lower the requirements for the construction area site.

[0051] Optionally, a buffer is provided between the nozzle 32 and the mounting base 31. The buffer is configured to absorb the reaction force of the nozzle 32, reduce the vibration during equipment operation, and improve the stability during operation.

[0052] For example, the buffer is a spring, which is easy to obtain and responds quickly and promptly, providing a good buffering effect.

[0053] For example, as shown in Figure 2, the auxiliary support structure 2 also includes a mounting member 24. The mounting member 24 is disposed on the side of the main structure 1 near the crash barrier. The fixed end of the linear drive mechanism 21 is hinged to the end of the mounting member 24 away from the road surface, and the support rod 22 is hinged to the end of the mounting member 24 near the road surface. The mounting member 24 is welded to the main structure 1. The above arrangement facilitates the installation of the linear drive mechanism 21 and the support rod 22.

[0054] For example, referring to Figure 1, in this embodiment, the mounting component is a channel steel, which is readily available and economical.

[0055] Optionally, as shown in Figure 3, the main structure 1 includes a chassis 11 and multiple drive wheels 12 spaced apart on the bottom side of the chassis 11. Each drive wheel 12 is correspondingly provided with a fourth drive mechanism 121, which is fixed to the chassis 11. The drive wheel 12 is connected to the output end of the corresponding fourth drive mechanism 121. Driven by the fourth drive mechanism 121, the drive wheel 12 can rotate to enable the main structure 1 to move on the road surface.

[0056] For example, in this embodiment, a first mounting bracket 122 is provided between each drive wheel 12 and the chassis 11. The fourth drive mechanism 121 and the drive wheel 12 are respectively disposed on both sides of the first mounting bracket 122, and the drive wheel 12 is connected to the output end of the corresponding fourth drive mechanism 121. For example, the fourth drive mechanism 121 is a rotary motor commonly used in the art. As long as it can drive the drive wheel 12 to rotate, it is acceptable. Its structure and principle are based on relevant technologies and will not be described in detail here.

[0057] For example, continuing to refer to Figure 3, the main structure 1 also includes multiple driven wheels 13, multiple driving wheels 12 disposed at one end of the chassis 11, and multiple driven wheels 13 disposed at the other end of the chassis 11. For example, in this embodiment, there are two driven wheels 13 and two driving wheels 12. The two driving wheels 12 are disposed at the end of the chassis 11 away from the nozzle structure 3, and the two driven wheels 13 are disposed at the other end of the chassis 11 closer to the nozzle structure 3. That is, the main structure 1 adopts a rear-mounted drive wheel and operates in a reverse motion. When turning is required, the rotational speed of the fourth drive mechanism 121 corresponding to the two driving wheels 12 is adjusted to create a speed difference between them, thereby driving the device to turn.

[0058] For example, in this embodiment, a second mounting bracket 132 is provided between each driven wheel 13 and the chassis 11, and the driven wheel 13 is rotatably mounted on the corresponding second mounting bracket 132. Furthermore, the driven wheel 13 is a caster wheel that has been disclosed in related technologies.

[0059] For example, continuing to refer to Figure 3, an elastic damping element 131 is provided between each driven wheel 13 and the chassis 11. One end of the elastic damping element 131 is connected to the axle of the driven wheel 13, and the other end is connected to the chassis 11. Specifically, in this embodiment, the other end of the elastic damping element 131 is connected to the second mounting bracket 132. The above arrangement can buffer the bumps and vibrations experienced by the main structure 1 during movement, and improve the stability of the equipment during operation.

[0060] For example, the elastic damping element 131 is a spring commonly used in the art, which has good response speed and damping effect, and has a long service life and good durability.

[0061] Optionally, a counterweight is provided on the side of the main structure 1 facing the ground, which can effectively lower the center of gravity of the equipment, prevent the equipment from tipping over, and effectively improve the stability of the equipment.

[0062] For example, the weight of the counterweight can be selected as needed according to actual conditions. The counterweight can be welded to the chassis 11, or the chassis 11 can be provided with a support plate for supporting the counterweight, and the counterweight can be placed on the support plate.

[0063] Optionally, a sensor is installed on the chassis 11 and connected to the control structure 4. The sensor can read the distance between the equipment and the boundary of the designated construction area. Furthermore, the PLC in the control structure 4 can move and adjust the chassis 11 to prevent the equipment from deviating from the preset work path, while also improving the accuracy and precision of the equipment during its movement and reducing the risk of the equipment falling.

[0064] Optionally, a movable structure 5 is provided between the main structure 1 and the mounting base 31. As shown in Figure 4, the movable structure 5 includes a first rack 51, a sliding plate 52, a first drive mechanism 53, a second rack 54, and a second drive mechanism 55. The first rack 51 extends horizontally and is fixed to the main structure 1. The sliding plate 52 is slidably disposed on the main structure 1 horizontally. The first drive mechanism 53 is fixed to the sliding plate 52, and a first gear is provided at the output end of the first drive mechanism 53, which meshes with the first rack 51. Under the drive of the first drive mechanism 53, the first gear rotates along the extension direction of the first rack 51, thereby causing the sliding plate 52 to slide horizontally. The second rack 54 extends vertically and is fixed to the sliding plate 52. The second drive mechanism 55 is fixed to the mounting base 31, and a second gear is provided at the output end of the second drive mechanism 55, which meshes with the second rack 54. Driven by the second drive mechanism 55, the second gear rotates along the extension direction of the second rack 54, thereby causing the mounting base 31 to slide vertically. This configuration enables the mounting base 31 to move horizontally and vertically, thereby allowing the nozzle 32 to move and ensuring complete breaching of the crash barrier.

[0065] Both the first drive mechanism 53 and the second drive mechanism 55 are commonly used rotary motors in this field. As long as they can drive the corresponding gears to rotate, they are fine. Their principles and structures are based on relevant technologies and will not be described in detail here.

[0066] Optionally, referring to Figure 4, the moving structure 5 further includes a guide assembly 56, which includes a first guide rail 561, a second guide rail 563, and a plurality of first guide wheels 562. The first guide rail 561 extends horizontally and is disposed on the main structure 1, and is spaced parallel to the first rack 51. The plurality of first guide wheels 562 are spaced on the sliding plate 52, and each first guide wheel 562 slidably abuts against the main structure 1 along the first guide rail 561 to guide the sliding of the sliding plate 52 in the horizontal direction, ensuring stability during horizontal movement. The second guide rail 563 extends vertically and is disposed on the sliding plate 52, and is spaced parallel to the second rack 54. A groove 311 is provided on the side of the mounting base 31 facing the sliding plate 52, and the second guide rail 563 is slidably engaged in the groove 311 to guide the sliding of the mounting base 31 in the vertical direction, ensuring stability during vertical movement.

[0067] For example, in this embodiment, two first guide rails 561 are provided. The two first guide rails 561 are respectively arranged on both sides of the first rack 51 in a vertical direction. Each first guide rail 561 has two first guide wheels 562 slidingly abutting on the side away from the first rack 51.

[0068] For example, the first guide wheel 562 is hourglass-shaped, and a locking part is provided at the middle position of the first guide wheel 562. The locking part is surrounded on the outer wall of the first guide wheel 562, and the locking part slides against the first guide rail 561 to improve the stability of the first guide wheel 562 during the sliding process along the first guide rail 561.

[0069] For example, both the side of the slide groove 311 and the side of the second guide rail 563 are trapezoidal to ensure the stability of the second guide rail 563 during the sliding process along the slide groove 311.

[0070] Optionally, the waterjet demolition equipment also includes a protective net, which is installed on the outside of the nozzle structure 3 and the moving structure 5 and is detachably mounted on the main structure 1. After the crash barrier is demolished by waterjet, it will break into multiple concrete fragments. The protective net can prevent the splashing concrete fragments from damaging the nozzle structure 3 and the moving structure 5, reduce operational risks, effectively prevent damage to various components, and thus extend the service life of the equipment. At the same time, it can also ensure the smooth progress of the demolition operation.

[0071] For example, the protective mesh is grid-shaped, and the mesh size can be set as needed.

[0072] Optionally, a rotating structure 6 is provided between the mounting base 31 and the nozzle 32. The rotating structure 6 includes a third drive mechanism 61, an eccentric shaft 62, and a nozzle seat 63, as shown in Figure 4. The third drive mechanism 61 is fixed to the mounting base 31, the eccentric shaft 62 is connected to the output end of the third drive mechanism 61 and is rotatably mounted on the mounting base 31, one end of the nozzle seat 63 has a slotted hole 631, one end of the eccentric shaft 62 is slidably inserted into the slotted hole 631, and the other end of the eccentric shaft 62 is rotatably mounted on the mounting base 31 in a horizontal direction. The nozzle 32 is mounted on the nozzle seat 63. Driven by the third drive mechanism 61, the eccentric shaft 62 rotates, causing the end of the eccentric shaft 62 inserted into the slotted hole 631 to rotate, driving the nozzle seat 63 to rotate in a horizontal direction, thereby realizing the rotation of the nozzle 32 in a horizontal direction, adjusting the direction of the water jet from the nozzle 32, and ensuring complete demolition of the crash barrier.

[0073] For example, in this embodiment, the swing angle range of the nozzle seat 63 is approximately 20°.

[0074] For example, the third drive mechanism 61 is also a rotary motor commonly used in the art, as long as it can drive the eccentric wheel shaft 62 to rotate.

[0075] Optionally, as shown in Figure 1, the nozzle structure 3 further includes multiple stop members 33. The stop members 33 are disposed on the side of the nozzle structure 3 near the outside of the demolition area (i.e., the stop members 33 are disposed outside the demolition area), and the end of the stop member 33 near the road surface is an outwardly bent arc. The above arrangement is used to stop splashed concrete fragments.

[0076] For example, the stop 33 is made of rubber material, which has good wear resistance and is easy to process.

[0077] On the other hand, this embodiment also provides a demolition method, which uses the above-mentioned water jet demolition equipment, including:

[0078] S1: Determine the demolition area and plan the movement path of nozzle 32;

[0079] For example, based on the construction drawings, the operating area and movement path of the equipment are determined to ensure that there are no obstacles on the operating path of the equipment.

[0080] S2: Place the main structure 1 on the road surface inside the demolition area, and adjust the linear drive mechanism 21 so that the auxiliary support wheel 23 abuts against the road surface;

[0081] For example, the main structure 1 is placed on the road surface inside the demolition area, the two linear drive mechanisms 21 are adjusted so that the two auxiliary support wheels 23 are both in contact with the road surface, and the equipment is connected to the circuit and water system.

[0082] S3: Control structure 4 controls the movement of main structure 1, the movement of mounting base 31, and the rotation and start / stop of nozzle 32 according to the planned movement path to complete the demolition.

[0083] For example, according to the planned movement path of the nozzle 32, the control structure 4 controls the movement of the main structure 1, the movement of the mounting base 31, and the rotation and start / stop of the nozzle 32 to demolish the demolition area until all demolition tasks are completed. Subsequent demolition quality inspection is then conducted to identify defects, which are then manually corrected using a pickaxe.

[0084] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the scope of protection of this application. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

A water jet demolition device, comprising: The main structure (1) is movably installed on the road surface inside the crash barrier; An auxiliary support structure (2) is provided on the side of the main structure (1) near the crash barrier. The auxiliary support structure (2) includes a linear drive mechanism (21), a support rod (22), and an auxiliary support wheel (23). The fixed end of the linear drive mechanism (21) is provided on the main structure (1). One end of the support rod (22) is hinged to the main structure (1), and the other end of the support rod (22) is hinged to the output end of the linear drive mechanism (21). The auxiliary support wheel (23) is provided on the side of the support rod (22) facing the road surface. The nozzle structure (3) includes a mounting base (31) and a nozzle (32). The mounting base (31) is movably disposed at the end of the main structure (1), and the nozzle (32) is rotatably disposed on the mounting base (31). The control structure (4) is disposed on the main structure (1) and can control the movement of the main structure (1), the movement of the mounting base (31), and the rotation and start / stop of the nozzle (32). According to claim 1, the water jet demolition device, wherein, A movable structure (5) is provided between the main structure (1) and the mounting base (31), the movable structure (5) comprising: The first rack (51) extends horizontally and is fixed to the main structure (1); A sliding plate (52) is slidably disposed on the main structure (1) in the horizontal direction; A first drive mechanism (53) is fixed on the sliding plate (52). The output end of the first drive mechanism (53) is provided with a first gear, which meshes with the first rack (51). The second rack (54) extends vertically and is fixed on the sliding plate (52); The second drive mechanism (55) is fixed on the mounting base (31). The output end of the second drive mechanism (55) is provided with a second gear, which meshes with the second rack (54). According to claim 2, the water jet demolition device, wherein, The moving structure (5) further includes a guide component (56), the guide component (56) comprising: The first guide rail (561) extends horizontally and is disposed on the main structure (1), and is arranged parallel to the first rack (51) at intervals; Multiple first guide wheels (562) are spaced apart on the sliding plate (52), and each first guide wheel (562) is slidably abutted against the main body structure (1) along the first guide rail (561); The second guide rail (563) extends vertically and is disposed on the sliding plate (52) and is arranged parallel to the second rack (54) at intervals. The mounting base (31) is provided with a groove (311) on the side facing the sliding plate (52), and the second guide rail (563) is slidably engaged in the groove (311). The water jet demolition device according to claim 2 further includes a protective cover net, which is disposed on the outside of the nozzle structure (3) and the movable structure (5) and is detachably disposed on the main structure (1). According to claim 1, the water jet demolition device, wherein, A rotating structure (6) is provided between the mounting base (31) and the nozzle (32), the rotating structure (6) comprising: The third drive mechanism (61) is fixed on the mounting base (31); An eccentric wheel shaft (62) is connected to the output end of the third drive mechanism (61) and is rotatably mounted on the mounting base (31); The nozzle holder (63) has a strip hole (631) at one end. One end of the eccentric wheel shaft (62) can be slidably inserted into the strip hole (631), and the other end of the eccentric wheel shaft (62) is rotatably mounted on the mounting base (31) in the horizontal direction. The nozzle (32) is mounted on the nozzle holder (63). According to claim 1, the water jet demolition device, wherein, The main structure (1) includes a chassis (11) and a plurality of drive wheels (12) spaced apart on the bottom side of the chassis (11). Each drive wheel (12) is provided with a corresponding fourth drive mechanism (121). The fourth drive mechanism (121) is fixed on the chassis (11), and the drive wheel (12) is connected to the output end of the corresponding fourth drive mechanism (121). According to claim 6, the water jet demolition device, wherein, The main structure (1) also includes a plurality of driven wheels (13), a plurality of driving wheels (12) are disposed at one end of the chassis (11), and a plurality of driven wheels (13) are disposed at the other end of the chassis (11). According to claim 7, the water jet demolition device, wherein, Each of the driven wheels (13) is provided with an elastic shock absorber (131) between itself and the chassis (11). According to any one of the water jet demolition devices described in claims 1-8, wherein, The main structure (1) has a counterweight on the side facing the road surface. A demolition method, employing the water jet demolition equipment as described in any one of claims 1-9, comprising: Determine the demolition area and plan the movement path of the nozzle (32); Place the main structure (1) on the road surface inside the demolition area, and adjust the linear drive mechanism (21) so that the auxiliary support wheel (23) abuts against the road surface; The control structure controls the movement of the main structure (1), the movement of the mounting base (31), and the rotation and start / stop of the nozzle (32) according to the planned movement path, thus completing the demolition.

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