Intelligent resonance breaking vehicle for bridge concrete pavement layer and precise operation method

Abstract

The application relates to the technical field of bridge engineering maintenance, in particular to an intelligent resonance breaking vehicle for bridge concrete pavement layers and a precise operation method, which comprises a vehicle body, a resonance breaking system, a microwave thermal coupling system, an intelligent control system and an auxiliary mechanism. The microwave thermal coupling system generates high-frequency electromagnetic waves through a microwave generator, selectively heats the internal aggregate and mortar interface of the concrete, and induces thermal stress cracks; the resonance breaking system matches the inherent frequency of the bridge pavement layer by using an eccentric wheel mechanism (40-60 Hz) with adjustable frequency, so that precise resonance breaking is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge engineering maintenance technology, in particular to a bridge concrete pavement layer intelligent resonance breaking vehicle and precise operation method. BACKGROUND

[0002] As a key functional layer of the bridge structure, the bridge concrete pavement layer directly bears the vehicle load and environmental action, and the efficient breaking of the damaged bridge concrete pavement layer has always been a technical difficulty in bridge maintenance engineering. The traditional breaking methods such as pneumatic pick chiseling and hydraulic splitting have obvious defects: first, the efficiency is low, the pneumatic pick needs manual point-by-point operation, the breaking speed is slow, and the impact vibration is easy to transmit to the beam through the pavement layer, causing micro-cracks or structural damage to the beam; second, the adaptability is poor, the dense steel mesh (commonly with a spacing of 10cm×10cm) is usually arranged in the bridge pavement layer, and the traditional machinery cannot realize complete separation of the aggregate and the steel bar, and the aggregate recycling rate is less than 35%; third, the environmental protection problem is prominent, the construction noise is often more than 85dB, the dust pollution is serious, and it cannot meet the environmental protection requirements of urban bridge night construction (the noise should be less than 75dB);

[0003] The resonance stone breaking technology improves the breaking efficiency of the road concrete pavement layer through high-frequency vibration (40-60Hz), and can effectively inhibit the reflection cracks of the added asphalt surface layer. The bridge concrete pavement layer is a key functional layer directly bearing the vehicle load, and its breaking operation faces unique structural challenges. The bridge pavement layer is tightly bonded with the underlying main beam (T-beam, box beam, etc.) through the steel mesh (commonly with a spacing of 10cm×10cm), forming a composite stress system. Although the traditional resonance stone breaking technology is widely used in road engineering, its high-frequency vibration energy (40-60Hz) is easily transmitted to the beam through the rigid connection in the bridge scene. If the equipment vibration frequency is close to the natural frequency of the beam, it may cause structural resonance, leading to stress concentration and even micro-cracks in the beam, directly threatening the safety of the bridge main body. In addition, the dense steel mesh hinders the breaking efficiency, making it difficult to separate the aggregate and the steel bar, and the traditional machinery cannot realize precise breaking and efficient resource recycling. On the other hand, the microwave heating technology, as a green breaking method, utilizes the difference in dielectric properties between the aggregate and the mortar in concrete, and induces selective heating at the interface through microwave irradiation, generating a temperature gradient of more than 150℃, which weakens the bonding strength. However, single microwave breaking requires long-time irradiation (usually tens of minutes), high energy consumption, and poor heating uniformity, which easily leads to local overheating or damage to the aggregate, limiting the engineering application value. SUMMARY

[0004] In order to solve the problems raised in the background art, the present application provides a bridge concrete pavement layer intelligent resonance breaking vehicle and precise operation method.

[0005] The application provides a bridge concrete pavement intelligent resonance breaking vehicle.

[0006] The bridge concrete pavement intelligent resonance breaking vehicle comprises a breaking vehicle main body, a resonance breaking system, a microwave thermal coupling system, an intelligent control system and an auxiliary mechanism.

[0007] The resonance breaking structure comprises two horizontal guide rails arranged in the resonance breaking cavity, a counterweight box arranged on the two horizontal guide rails through a first lifting structure, a resonance breaking box arranged on the two steel plates below the counterweight box through a damping structure, two groups of resonance breaking shafts arranged on the resonance breaking box, and the resonance breaking shafts are connected with the output shaft ends of the hydraulic motors.

[0008] The resonance breaking shaft comprises two shaft sections two rotating through the front side of the resonance breaking box, a shaft section one connected with the front end of the shaft section two, a shaft section three connected with the rear end of the shaft section two, a shaft section four connected with the rear end of the shaft section three, a straight tooth cylindrical gear sleeved on the shaft section four, two shaft sections six arranged in the resonance breaking box, a shaft section five connected with the front and rear sections of the shaft section six, a front side of the shaft section five connected with the shaft section four, an eccentric mass block sleeved on the two shaft sections five, a rear side of the shaft section five connected with a shaft section seven, a rear end of the shaft section seven connected with a shaft section eight, the shaft section eight penetrating out of the breaking vehicle main body, and a rear end of the shaft section eight connected with a shaft section nine.

[0009] The two groups of eccentric mass blocks are symmetrically arranged, a safety interval is left between the eccentric mass blocks and the resonance breaking box, the eccentric mass blocks are made of 45 steel, and the two groups of eccentric mass blocks rotate at equal speed and in opposite directions.

[0010] A connecting frame is arranged below the resonance breaking box, a breaking hammer head is fastened to the connecting frame through bolts, the connecting frame is made of low-carbon steel, and the breaking hammer head is made of high-manganese steel.

[0011] A box cover is fastened to the resonance breaking box through bolts.

[0012] An inner groove is arranged at the position of the vehicle head of the breaking vehicle main body, and a heating structure is arranged in the inner groove.

[0013] Preferably, the damping structure comprises two groups of damping springs arranged on the left and right sides of the resonance breaking box, steel plates are arranged at the two ends of each damping spring, one group of the steel plates is arranged on the side surface of the resonance breaking box, the other group of the steel plates is arranged on a damping frame, and the damping frame is mounted on the steel plate of the counterweight box.

[0014] Preferably, the first lifting structure comprises a hydraulic oil cylinder mounted on a horizontal guide rail, a connecting block is arranged at the top end of the output shaft of the hydraulic oil cylinder, and connecting seats are arranged above the left and right sides of the counterweight box.

[0015] Preferably, the heating structure comprises a U-shaped frame fixedly arranged in the inner groove, a microwave heating device is arranged on the U-shaped frame through a turnover structure, and the microwave heating device comprises a microwave heating wall composed of a plurality of magnetrons and horn arrays.

[0016] Preferably, the turnover structure comprises a first fixed shaft connected above the inner wall of the U-shaped frame, two first sleeve plates are rotatably arranged on the first fixed shaft, a second fixed shaft is connected between the inner walls of the front and rear sides of the microwave heating device, two second sleeve plates are rotatably arranged on the second fixed shaft, a hydraulic cylinder is mounted on the first sleeve plate, one end of the output shaft of the hydraulic cylinder is connected to the second sleeve plate, fixed plates are connected to the U-shaped frame near the two ends, a turnover handle is rotatably arranged at one end of the fixed plate, and one end of the turnover handle is connected to the microwave heating device.

[0017] Preferably, the shielding structure comprises two horizontal plates fastened on the front and rear sides of the crushing vehicle body through bolts, an inner plate is arranged on the horizontal plate through a second lifting structure, a plurality of first through grooves are formed in the inner plate, a shielding strip is movably arranged in each first through groove, a limiting strip is arranged above the first through groove on the shielding strip, a tensioning structure is arranged on the inner plate, a bottom groove is formed in the bottom end of the shielding strip, and a roller is mounted in the bottom groove.

[0018] Preferably, grooves are formed at the two ends of the inner plate, a first fixed rod is arranged in the groove, an elastic rope is connected between the two first fixed rods, a top groove is formed in the top end of the shielding strip, a second fixed rod is fixedly arranged in the top groove, a pulley is movably arranged on the second fixed rod, and the elastic rope is tensioned on the pulley.

[0019] Preferably, the second lifting structure comprises a second through groove formed in the middle of the horizontal plate, a lifting frame is movably arranged in the second through groove, the two ends of the lifting frame are connected to the inner plate, a positioning rod is movably arranged in the middle of the horizontal plate, a handle is mounted at one end of the positioning rod, a tensioning spring is sleeved on the positioning rod, and the two ends of the tensioning spring are connected to the horizontal plate and the handle, respectively, two positioning grooves are formed in the lifting frame, and one end of the positioning rod is movably inserted into the upper positioning groove.

[0020] In a second aspect, the application provides a precise crushing method of a bridge concrete pavement intelligent resonance crushing vehicle, which adopts the following technical scheme:

[0021] A precise crushing method of a bridge concrete pavement intelligent resonance crushing vehicle comprises the following steps:

[0022] S1: Bridge interface identification and path planning: a 30-50 cm wide groove is excavated on the bridge deck by a handheld pick, the interface between the pavement layer and the beam body is identified, the breaking path is planned based on the GIS system, and the bridge expansion joint and crash barrier area are avoided; for the dense area of the bridge reinforcement mesh, a cutting machine is used to pre-cut (interval 100 cm x 100 cm), the reinforcement mesh is cut off to avoid resonance breaking causing stress concentration on the beam body;

[0023] S2: Microwave preheating: the microwave generator irradiates the concrete surface with a power of 15-20 kW for 30-60 seconds, the internal aggregate and mortar interface is heated to 180-250℃, and thermal stress microcracks are generated; the microwave frequency is preferably 2450 MHz, the penetration depth is 5-10 cm, and the dielectric difference between the aggregate (dielectric constant ε' ≈ 4-6) and the mortar (ε' ≈ 8-12) is used to realize selective heating, and the interface temperature difference is ≥ 150℃;

[0024] S3: Resonance breaking: start the resonance breaking system, vibrate the concrete pavement layer at a frequency of 45-55 Hz, the breaking depth is 10-20 cm, and the high-pressure spray system sprays cold water to strengthen crack propagation;

[0025] S4: Precise control and aggregate recycling: an infrared thermal imager detects the uniformity of the temperature field, an acoustic sensor feedbacks the gravel particle size, a PLC controller dynamically adjusts the parameters, and the aggregate is recycled after screening, and the regeneration rate is ≥ 80%; the breaking particle size is controlled with the standard deviation of the particle size as the objective function, and the fuzzy PID algorithm is used to adjust the parameters, so that the particle size of the broken aggregate is uniform (3-8 cm), and the beam body flatness error is ≤ 3 mm / m.

[0026] In summary, the present application has the following beneficial technical effects:

[0027] The present application sets up the exciting structure, two groups of eccentric mass blocks are symmetrically arranged in the exciting structure, a safety distance is left between the eccentric mass blocks and the exciting box, the eccentric mass blocks are made of 45 steel, two groups of eccentric mass blocks rotate at the same speed and in opposite directions, the rotation of the eccentric mass blocks drives the vibration of the exciting box and the breaking hammer head, and the concrete pavement layer is broken, and the shape and mass of the eccentric mass blocks are reasonably designed, so that the vibration frequency can be flexibly adjusted according to the actual broken concrete pavement layer, so that the concrete pavement layer can be better broken, and the breaking work quality is improved; at the same time, the breaking hammer head is installed on the exciting box through the connecting frame, which can not only reduce the cost, but also improve the service life of the breaking hammer head, and also facilitates the disassembly, maintenance and replacement of the breaking hammer head;

[0028] The present application sets up heating structure and turnover structure, and the microwave heating device in the heating structure is attached to the concrete pavement layer through the turnover structure, the microwave heating wall is composed of multiple magnetrons and horn waveguide arrays of the microwave heating device, the concrete pavement layer is brittle, the material property is deteriorated, the concrete pavement layer has lower fracture energy, higher crushing degree and better aggregate release effect;

[0029] The present application sets up damping structure, first lifting structure and counterweight box, and the total mass of vibration can be increased by using the damping structure and the counterweight box, the vibration is driven by the vibration excitation structure and the counterweight box, the remaining energy is used to drive the counterweight box to vibrate, the energy transmitted to the vehicle body is reduced, and the damping effect is remarkable.

[0030] The present application sets up second lifting structure, shielding structure and tensioning structure, the shielding structure is driven to move downward when the crushing surface is crushed, the safety problem caused by the flying of debris is avoided in the crushing process, and the high and low of the crushed concrete pavement layer is different, the bottom end roller of each shielding strip is supported on the concrete pavement layer through the tensioning structure, so that the shielding work is better. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structure schematic diagram of a bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application;

[0032] Figure 2 is a structure schematic diagram of a bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application;

[0033] Figure 3 is a structure schematic diagram of a bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application; Figure 2 is an enlarged view of the structure at A of the bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application;

[0034] Figure 4 is a structure schematic diagram of a bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application;

[0035] Figure 5 is a structure schematic diagram of a bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application;

[0036] Figure 6 is a structure schematic diagram of a bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application;

[0037] Figure 7 is a structure schematic diagram of a bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application;

[0038] Figure 8 is a structure schematic diagram of a bridge concrete pavement layer intelligent resonance crushing vehicle and precise operation method in the embodiment of the present application.

[0039] BRIEF DESCRIPTION OF DRAWINGS 1, broken car body; 2, excitation cavity; 3, horizontal guide rail; 4, excitation box; 5, breaking hammer head; 6, shaft section one; 7, shaft section two; 8, shaft section four; 9, straight tooth cylindrical gear; 10, shaft section five; 11, eccentric mass; 12, shaft section six; 13, shaft section seven; 14, shaft section eight; 15, shaft section nine; 16, box cover; 17, shock absorbing spring; 18, shock absorbing frame; 19, hydraulic oil cylinder; 20, connecting block; 21, connecting seat; 22, counterweight box; 23, inner groove; 24, fixed plate; 25, turnover handle; 26, microwave heating device; 27, U-shaped frame; 28, first fixed shaft; 29, first sleeve plate; 30, hydraulic cylinder; 31, second sleeve plate; 32, second fixed shaft; 33, cross plate; 34, inner plate; 35, positioning rod; 36, barrier strip; 37, bottom groove; 38, roller; 39, limiting strip; 40, first through groove; 41, groove; 42, first fixed rod; 43, elastic rope; 44, top groove; 45, second fixed rod; 46, pulley; 47, second through groove; 48, lifting frame; 49, tension spring; 50, handle; 51, positioning groove; 52, connecting frame. DETAILED DESCRIPTION

[0040] The above description is made in conjunction with the accompanying drawings Figures 1-8 The application is further described in detail.

[0041] Reference Figures 1-8 The embodiment of the application discloses a bridge concrete pavement layer intelligent resonance breaking car, which comprises a breaking car body 1, a resonance breaking system, a microwave thermal coupling system, an intelligent control system and an auxiliary mechanism, an excitation cavity 2 is formed in the breaking car body 1, an excitation structure is arranged in the excitation cavity 2, and a barrier structure is arranged on the breaking car body 1 at the front and rear sides of the excitation cavity 2.

[0042] The excitation structure comprises two horizontal guide rails 3 arranged in the excitation cavity 2, a counterweight box 22 is arranged on the two horizontal guide rails 3 through first lifting structures, an excitation box 4 is arranged on the two steel plates below the counterweight box 22 through damping structures, two groups of excitation shafts are arranged on the excitation box 4, and the excitation shafts are connected with the output shaft ends of the hydraulic motors.

[0043] The excitation shafts comprise two shaft section twos 7 penetrating through the front side of the excitation box 4, the front end of the shaft section two 7 is connected with a shaft section one 6, the rear end of the shaft section two 7 is connected with a shaft section three, the rear end of the shaft section three is connected with a shaft section four 8, a straight tooth cylindrical gear 9 is sleeved on the shaft section four 8, two shaft section sixes 12 are arranged in the excitation box 4, the front and rear sections of the shaft section six 12 are both connected with a shaft section five 10, the front side of the shaft section five 10 is connected with the shaft section four 8, the two shaft section fives 10 are both sleeved with eccentric masses 11, the rear end of the rear side of the shaft section five 10 is connected with a shaft section seven 13, the rear end of the shaft section seven 13 is connected with a shaft section eight 14, the shaft section eight 14 penetrates out of the breaking car body 1, and the rear end of the shaft section eight 14 is connected with a shaft section nine 15.

[0044] The connecting frame 52 is arranged below the excitation box 4, and the crushing hammer head 5 is fastened below the connecting frame 52 by bolts. The connecting frame 52 is made of low-carbon steel, and the crushing hammer head 5 is made of high-manganese steel, which significantly improves the surface hardness and wear resistance, thereby prolonging the service life of the crushing hammer head 5. The crushing hammer head 5 is directly installed below the excitation box 4, which simplifies the structure of the vehicle body and solves the problems of technical monopoly of the resonance beam and high maintenance cost. The damping springs 17 and the damping frames 18 are installed on both sides of the excitation box 4 to reduce the transmission of vibration to the vehicle body.

[0045] The box cover 16 is fastened on the upper surface of the excitation box 4 by bolts, which not only reduces the installation difficulty but also reduces the manufacturing cost of the excitation box 4.

[0046] An inner groove 23 is formed at the front position of the main body 1 of the crushing vehicle, and a heating structure is arranged in the inner groove 23.

[0047] The damping structure includes two groups of damping springs 17 arranged on the left and right sides of the excitation box 4. The damping springs 17 are rubber springs made of polyurethane material, which have higher strength, wear resistance, oil resistance, and aging resistance than ordinary rubber. The damping springs 17 not only achieve damping but also can withstand shear force during up and down vibration to ensure the required amplitude during the crushing process. Steel plates are arranged at both ends of each damping spring 17. One group of steel plates is arranged on the side surface of the excitation box 4, and the other group of steel plates is arranged on the damping frame 18. The damping frame 18 is installed on the steel plate of the counterweight box 22. The installation of the counterweight box 22 with a certain mass on the upper surface of the excitation box 4 can increase the total mass of the vibration. The excitation system drives the crushing hammer head 5 and the counterweight box 22 to vibrate. The remaining energy during vibration is used to drive the counterweight box 22 to vibrate, reducing the energy transmitted to the vehicle body and achieving significant damping effect.

[0048] The first lifting structure includes a hydraulic cylinder 19 installed on the horizontal guide rail 3. The output shaft of the hydraulic cylinder 19 is provided with a connecting block 20. The counterweight box 22 is provided with a connecting seat 21 on the upper surface of the left and right side surfaces. The connecting block 20 is rotatably arranged in the connecting seat 21. According to the actual state of the concrete paving layer, the height of the crushing hammer head 5 can be flexibly adjusted.

[0049] Referring to Figure 4 , Figure 7 and Figure 8 The heating structure includes a U-shaped frame 27 fixedly arranged in the inner groove 23. The U-shaped frame 27 is provided with a microwave heating device 26 through a turnover structure. The microwave heating device 26 is composed of a microwave heating wall formed by a plurality of magnetrons and horn arrays. The working state of any magnetron can be controlled through the vehicle-mounted liquid crystal control panel, which provides great convenience for model establishment.

[0050] The turnover structure comprises a first fixed shaft 28 connected above the inner wall of the U-shaped frame 27, two first sleeve plates 29 rotatably sleeved on the first fixed shaft 28, a second fixed shaft 32 connected between the inner walls on the front and rear sides of the microwave heating device 26, two second sleeve plates 31 rotatably arranged on the second fixed shaft 32, a hydraulic cylinder 30 mounted on the first sleeve plate 29, and an output shaft of the hydraulic cylinder 30 connected to the second sleeve plate 31. The U-shaped frame 27 is provided with a fixed plate 24 near each end, and a turnover handle 25 is rotatably arranged at one end of the fixed plate 24 and connected to the microwave heating device 26. Before crushing, the hydraulic cylinder 30 is started to drive the turnover handle 25 to rotate on the fixed plate 24, and the microwave heating device 26 is pushed tightly onto the concrete pavement layer to heat the concrete pavement layer, so that the concrete pavement layer becomes brittle, thereby making the to-be-crushed concrete pavement layer have lower fracture energy, higher crushing degree and better aggregate release effect.

[0051] Referring to Figures 1-3 The blocking structure comprises two horizontal plates 33 fastened on the front and rear sides of the crushing vehicle body 1 by bolts, an inner plate 34 arranged on the horizontal plate 33 by a second lifting structure, a plurality of first through grooves 40 evenly distributed and formed in the inner plate 34, a blocking strip 36 movably arranged in each first through groove 40, a limiting strip 39 arranged above the first through groove 40 on the blocking strip 36, a tensioning structure arranged on the inner plate 34, a bottom groove 37 formed at the bottom end of the blocking strip 36, and a roller 38 mounted in the bottom groove 37.

[0052] The inner plate 34 is provided with a recess 41 at each end, and a first fixed rod 42 is arranged in the recess 41. The two first fixed rods 42 are connected by an elastic rope 43. The top end of the blocking strip 36 is provided with a top groove 44, and a second fixed rod 45 is fixedly arranged in the top groove 44. A pulley 46 is movably sleeved on the second fixed rod 45, and the elastic rope 43 is pulled tight on the pulley 46.

[0053] The second lifting structure comprises a second through groove 47 formed in the middle of the horizontal plate 33, a lifting frame 48 movably passing through the second through groove 47, the lifting frame 48 being connected to the inner plate 34 at both ends, a positioning rod 35 movably passing through the middle of the horizontal plate 33, a handle 50 being installed at one end of the positioning rod 35, a tension spring 49 being sleeved on the positioning rod 35, the tension spring 49 being connected to the horizontal plate 33 and the handle 50 at both ends respectively, two positioning grooves 51 being formed in the lifting frame 48, one end of the positioning rod 35 movably being inserted into the upper positioning groove 51, before crushing, one end of the positioning rod 35 is pulled out from the lower positioning groove 51 by using the handle 50, the lifting frame 48 is moved downward on the horizontal plate 33, the inner plate 34 is driven to move downward, the bottom end roller 38 of the barrier strip 36 is supported on the concrete pavement layer by the elastic rope 43, so that the barrier strip 36 can shield the debris generated in the crushing process, improve the work safety, and the barrier strip 36 can be shielded on the uneven concrete pavement layer under the elastic force of the elastic rope 43, so that the debris shielding is more complete and the safety is higher.

[0054] The embodiment of the application further discloses a precise crushing method of the bridge concrete pavement intelligent resonance crushing vehicle.

[0055] S1: bridge interface identification and path planning: a hand-held pick is used to dig a 30-50cm wide groove on the bridge deck to identify the interface between the pavement layer and the beam body, a crushing path is planned based on a GIS system to avoid bridge expansion joints and crash barrier areas; for the dense area of the bridge reinforcement mesh, a cutting machine is used to pre-cut the joints (with a spacing of 100cm*100cm) to cut off the reinforcement mesh to avoid stress concentration on the beam body caused by resonance crushing;

[0056] S2: microwave preheating: a microwave generator irradiates the concrete surface at a power of 15-20kW for 30-60s to heat the internal aggregate and mortar interface to 180-250℃ to generate thermal stress microcracks; the microwave frequency is preferably 2450MHz, the penetration depth is 5-10cm, and the dielectric difference between the aggregate (dielectric constant ε'≈4-6) and the mortar (ε'≈8-12) is used to realize selective heating, and the interface temperature difference is ≥150℃;

[0057] S3: resonance crushing: the resonance crushing system is started to vibrate and crush the concrete pavement layer at a frequency of 45-55Hz, the crushing depth is 10-20cm, and the high-pressure spraying system sprays cold water to strengthen crack propagation;

[0058] S4: Precise control and aggregate recycling: infrared thermal imager detects temperature field uniformity, acoustic sensor feedbacks gravel particle size, PLC controller dynamically adjusts parameters, aggregate is recycled after screening, and the regeneration rate is greater than or equal to 80%; the crushing particle size is controlled by taking the particle size standard deviation as the objective function, and the fuzzy PID algorithm is used to adjust the parameters, so that the crushed aggregate particle size is uniform (3-8 cm), and the beam body flatness error is less than or equal to 3 mm / m.

[0059] The implementation principle of the bridge concrete pavement layer intelligent resonance crushing vehicle in the embodiment of the application is as follows: first, the microwave heating device 26 is turned over on the concrete pavement layer by starting the hydraulic cylinder 30 on the U-shaped frame 27, a microwave heating wall is formed by using multiple magnetrons and horn guide arrays, the concrete pavement layer to be crushed is heated, the concrete pavement layer is made brittle, the concrete pavement layer to be crushed has lower fracture energy, higher crushing degree and better aggregate release effect, then the microwave heating device 26 is flushed and pulled up, the crushing hammer head 5 is moved to the heated concrete pavement layer by the crushing vehicle main body 1, the crushing hammer head 5 is lowered to be close to the concrete pavement layer by starting the hydraulic oil cylinder 19, one end of the positioning rod 35 is pulled out from the lower positioning groove 51 by using the handle 50, the lifting frame 48 is moved downward on the cross plate 33, the blocking strip 36 on the inner plate 34 is lowered, the bottom end roller 38 of the blocking strip 36 is supported on the concrete pavement layer by pulling the elastic rope 43, in this way, the debris generated in the crushing process can be shielded by using the blocking strip 36 during crushing, the working safety is improved, then the two groups of eccentric masses 11 are rotated by starting the hydraulic motor, vibration is generated on the excitation box 4, and the concrete pavement layer is crushed by the crushing hammer head 5, in this way, the crushing work of the concrete pavement layer can be realized.

[0060] The above are preferred embodiments of the application, and do not limit the protection scope of the application, therefore: equivalent changes made according to the structure, shape, principle of the application should be covered in the protection scope of the application.

Claims

1. A bridge concrete pavement intelligent resonance breaking vehicle, comprising a breaking vehicle body (1), a resonance breaking system, a microwave thermal coupling system, an intelligent control system and an auxiliary mechanism, characterized in that: The crushing car body (1) is provided with a vibration cavity (2), and the vibration cavity (2) is provided with a vibration structure; the crushing car body (1) is provided with a blocking structure on the front and rear sides of the vibration cavity (2); The vibration structure comprises two horizontal guide rails (3) arranged in the vibration cavity (2), and a counterweight box (22) is arranged on the two horizontal guide rails (3) through a first lifting structure; two steel plates are arranged on the lower surface of the counterweight box (22) through a damping structure, and a vibration box (4) is arranged on the two steel plates; two groups of vibration shafts are arranged on the vibration box (4), and the vibration shafts are connected with the output shaft end of a hydraulic motor; The vibration shaft comprises two shaft sections two (7) penetrating through the front side of the vibration box (4), the front end of the shaft section two (7) is connected with a shaft section one (6), the rear end of the shaft section two (7) is connected with a shaft section three, the rear end of the shaft section three is connected with a shaft section four (8), a straight tooth cylindrical gear (9) is arranged on the shaft section four (8), two shaft sections six (12) are arranged in the vibration box (4), the two shaft sections six (12) are connected with a shaft section five (10), the front side of the shaft section five (10) is connected with the shaft section four (8), eccentric mass blocks (11) are arranged on the two shaft sections five (10), the rear end of the rear side of the shaft section five (10) is connected with a shaft section seven (13), the rear end of the shaft section seven (13) is connected with a shaft section eight (14), the shaft section eight (14) penetrates out of the crushing car body (1), and the rear end of the shaft section eight (14) is connected with a shaft section nine (15); The two groups of eccentric mass blocks (11) are symmetrically arranged, a safety distance is left between the eccentric mass blocks (11) and the vibration box (4), the eccentric mass blocks (11) are made of 45 steel, and the two groups of eccentric mass blocks (11) rotate in opposite directions at the same speed; A connecting frame (52) is arranged on the lower surface of the vibration box (4), the connecting frame (52) is fastened with a crushing hammer head (5) through bolts, the connecting frame (52) is made of low-carbon steel, and the crushing hammer head (5) is made of high-manganese steel; The vibration box (4) is fastened with a box cover (16) through bolts; An inner groove (23) is arranged at the position of the car head of the crushing car body (1), and a heating structure is arranged in the inner groove (23); The heating structure comprises a U-shaped frame (27) fixedly arranged in the inner groove (23), and a microwave heating device (26) is arranged on the U-shaped frame (27) through a turnover structure; the microwave heating device (26) comprises a microwave heating wall composed of a plurality of magnetrons and horn guide arrays; The turnover structure includes a first fixed shaft (28) connected above the inner wall of the U-shaped frame (27), two first sleeve plates (29) rotatably arranged on the first fixed shaft (28), a second fixed shaft (32) connected between the inner walls on the front and back of the microwave heating device (26), two second sleeve plates (31) rotatably arranged on the second fixed shaft (32), a hydraulic cylinder (30) mounted on the first sleeve plate (29), and an output shaft of the hydraulic cylinder (30) connected to the second sleeve plate (31) at one end, and a fixed plate (24) connected to the U-shaped frame (27) near both ends, a turnover handle (25) rotatably arranged at one end of the fixed plate (24), and the turnover handle (25) connected to the microwave heating device (26) at one end. The blocking structure includes two horizontal plates (33) fastened on the front and back of the crushing vehicle body (1) by bolts, an inner plate (34) arranged on the horizontal plate (33) by the second lifting structure, a plurality of first through grooves (40) evenly distributed and formed in the inner plate (34), a blocking strip (36) movably arranged in each first through groove (40), a limiting strip (39) arranged above the first through groove (40) on the blocking strip (36), a tensioning structure arranged on the inner plate (34), a bottom groove (37) formed in the bottom end of the blocking strip (36), and a roller (38) mounted in the bottom groove (37). Recesses (41) are formed in both ends of the inner plate (34), a first fixed rod (42) is arranged in each recess (41), an elastic rope (43) is connected between the two first fixed rods (42), a top groove (44) is formed in the top end of the blocking strip (36), a second fixed rod (45) is fixedly arranged in the top groove (44), a pulley (46) is movably arranged on the second fixed rod (45), and the elastic rope (43) is tensioned on the pulley (46). The second lifting structure includes a second through groove (47) formed in the middle of the horizontal plate (33), a lifting frame (48) movably arranged in the second through groove (47), the lifting frame (48) connected to the inner plate (34) at both ends, a positioning rod (35) movably arranged in the middle of the horizontal plate (33), a handle (50) mounted on one end of the positioning rod (35), a tensioning spring (49) sleeved on the positioning rod (35), the tensioning spring (49) connected to the horizontal plate (33) and the handle (50) at both ends, and two positioning grooves (51) formed in the lifting frame (48).

2. The intelligent resonant breaking vehicle for bridge concrete pavement layer according to claim 1, characterized in that: The damping structure includes two groups of damping springs (17) arranged on the left and right sides of the vibration excitation box (4), each damping spring (17) provided with a steel plate at both ends, one group of the steel plates arranged on the side surface of the vibration excitation box (4), and the other group of the steel plates arranged on the damping frame (18), and the damping frame (18) mounted on the steel plate of the counterweight box (22).

3. The intelligent resonant breaking vehicle for bridge concrete pavement layer according to claim 1, characterized in that: The first lifting structure comprises a hydraulic oil cylinder (19) mounted on a horizontal guide rail (3), a connecting block (20) arranged at the top end of the output shaft of the hydraulic oil cylinder (19), and a connecting seat (21) arranged above the left and right sides of the counterweight box (22).

4. A precise breaking method of a bridge concrete pavement intelligent resonance breaking vehicle, characterized in that: The operation method of the crushing vehicle uses the intelligent resonance crushing vehicle for bridge concrete pavement layer as claimed in any one of claims 1-3, and comprises the following steps: S1: bridge interface identification and path planning: a 30-50 cm wide groove is opened on the bridge deck by a handheld pick, the interface between the pavement layer and the beam body is identified, the crushing path is planned based on a GIS system, the bridge expansion joint and the anti-collision guardrail area are avoided, and for the dense area of the bridge reinforcement mesh, a cutting machine is used to pre-cut the joint (with a spacing of 100 cm*100 cm), the reinforcement mesh is cut off, and stress concentration on the beam body caused by resonance crushing is avoided; S2: microwave preheating: a microwave generator irradiates the concrete surface at a power of 15-20 kW for 30-60 seconds, the internal aggregate and mortar interface are heated to 180-250℃, thermal stress microcracks are generated, the microwave frequency is 2450 MHz, the penetration depth is 5-10 cm, the dielectric difference between the aggregate (dielectric constant ε'≈4-6) and the mortar (ε'≈8-12) is used to realize selective heating, and the interface temperature difference is ≥150℃; S3: resonance crushing: the resonance crushing system is started, the concrete pavement layer is crushed at a frequency of 45-55 Hz, the crushing depth is 10-20 cm, and the crack propagation is strengthened by the synchronous high-pressure spraying system; S4: precise regulation and aggregate recycling: an infrared thermal imager detects the uniformity of the temperature field, an acoustic wave sensor feeds back the gravel particle size, a PLC controller dynamically adjusts the parameters, and the aggregate is recycled after screening, and the regeneration rate is ≥80%; the crushing particle size is controlled by taking the particle size standard deviation as the objective function, the parameters are adjusted by using a fuzzy PID algorithm, the aggregate particle size after crushing is uniform (3-8 cm), and the beam body flatness error is ≤3 mm / m.

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