Expansion joint cleaning device for bridge maintenance

Abstract

The invention provides an expansion joint cleaning device for bridge maintenance, and belongs to the field of expansion joint cleaning, the expansion joint cleaning device comprises a bottom plate and a negative pressure adsorption pipe arranged on the bottom plate, the top of the bottom plate is provided with a swing mechanism, the bottom plate is provided with a crushing mechanism, and the crushing mechanism is connected with an air inlet pipe and a second communicating pipe; the crushing mechanism can crush broken stones clamped in the expansion joint; a damping mechanism is arranged on the bottom plate and connected with the air inlet pipe. According to the device, the crushing mechanism is arranged, so that when the device is used for cleaning the expansion joint and when the broken stone blocks are clamped in the expansion joint, the broken stone blocks can be crushed into particles in time, and then a nozzle is used for spraying high-pressure air flow to conduct air blowing cleaning on the particles; and then the residues are adsorbed and collected by the negative pressure adsorption pipe, so that secondary clamping stagnation is avoided, the residues in the expansion joint can be cleaned at a time, secondary cleaning is not needed, and the cleaning effect on the expansion joint is improved.

Description

Technical Field

[0001] The present invention relates to the field of cleaning bridge expansion joints, and more particularly, to a cleaning device for bridge expansion joints used in bridge maintenance. Background Art

[0002] A bridge generally refers to a structure erected over rivers, lakes, and seas to enable vehicles, pedestrians, etc. to pass smoothly. To adapt to the modern rapidly developing transportation industry, a bridge is also extended to a building erected to cross mountain streams, poor geological conditions, or to meet other transportation needs to make passage more convenient. An expansion joint is a structural joint provided at an appropriate position along the construction joint direction of a building or structure to prevent cracks or damage to the building components due to climate temperature changes (thermal expansion and contraction). To ensure the function of the expansion joint, it is necessary to clean the dust and impurities in the expansion joint during bridge maintenance. Most of the current cleaning devices use high-pressure air blowing for cleaning and then cooperate with negative pressure adsorption to adsorb and collect the dust and impurities to avoid secondary pollution. However, the vehicles passing by on the bridge will squeeze the crushed stones on the bridge surface into the expansion joint, and the crushed stones are easily stuck in the expansion joint, forming a jam. It is difficult to blow the stuck crushed stones using the high-pressure air blowing method. Therefore, after cleaning the dust and impurities, it is still necessary for the staff to use a steel hook to hook out the stuck crushed stones, which reduces the cleaning effect. How to invent a cleaning device for bridge expansion joints used in bridge maintenance to improve these problems has become an urgent problem for those skilled in the art. Summary of the Invention

[0003] To make up for the above deficiencies, the present invention provides a cleaning device for bridge expansion joints used in bridge maintenance, aiming to improve the problem that the vehicles passing by on the bridge will squeeze the crushed stones on the bridge surface into the expansion joint, the crushed stones are easily stuck in the expansion joint, forming a jam, it is difficult to blow the stuck crushed stones using the high-pressure air blowing method, and after cleaning the dust and impurities, it is still necessary for the staff to use a steel hook to hook out the stuck crushed stones, which reduces the cleaning effect.

[0004] The present invention is implemented as follows: The present invention provides a cleaning device for expansion joints in bridge maintenance, including a bottom plate and a negative pressure adsorption tube arranged on the bottom plate. Guide rollers are rotatably arranged on both sides of the bottom of the bottom plate. An air inlet pipe, a first connecting pipe, and a second connecting pipe are arranged above the bottom plate. Both ends of the first connecting pipe are internally connected to the air inlet pipe and the second connecting pipe. A blowing pipe is arranged on the bottom plate. One end of the blowing pipe is provided with a nozzle, and the other end of the blowing pipe is provided with a hose. Control valves are arranged inside both the air inlet pipe and the second connecting pipe. A one-way valve is arranged inside the first connecting pipe. A swinging mechanism is arranged on the top of the bottom plate, and the swinging mechanism is connected to both the second connecting pipe and the hose. A crushing mechanism is arranged on the bottom plate, and the crushing mechanism is connected to the air inlet pipe and the second connecting pipe. The crushing mechanism can crush the gravel blocks stuck in the expansion joint. A shock absorption mechanism is arranged on the bottom plate, and the shock absorption mechanism is connected to the air inlet pipe. The shock absorption mechanism can absorb shock for the crushing mechanism.

[0005] Preferably, the crushing mechanism includes a first flow guide cover arranged on the bottom plate. Both ends of the first flow guide cover are connected to the air inlet pipe and the second connecting pipe respectively. A first fan blade is arranged inside the first flow guide cover. A first driving shaft is arranged on the side wall of the first fan blade. A support plate is sleeved on the outer wall of the first driving shaft, and the side wall of the support plate is connected to the inner side wall of the first flow guide cover. A first driving bevel gear is arranged at one end of the first driving shaft. A first driven bevel gear meshing with the first driving bevel gear is arranged inside the first flow guide cover. A second rotating shaft is arranged at the top of the first driven bevel gear. An active pulley and a driven pulley are arranged above the bottom plate. A belt is sleeved on the outer walls of the active pulley and the driven pulley. One end of the second rotating shaft penetrates through the inner side wall of the first flow guide cover and is connected to the side wall of the driven pulley. A support sleeve is arranged above the bottom plate. A drill bit is arranged below the support sleeve. A positioning plate is arranged inside the support sleeve. A disc is rotatably arranged on the inner wall of the positioning plate. An electric telescopic rod is arranged at the bottom of the disc. One end of the electric telescopic rod is provided with a rotating column. One end of the rotating column penetrates through the inner bottom of the support sleeve and is connected to the drill bit. A first rotating shaft is arranged at the top of the disc. One end of the first rotating shaft penetrates through the inner top of the support sleeve and is connected to the active pulley.

[0006] Preferably, a second opening is formed at the top of the bottom plate. The drill bit is matched with the second opening, and the drill bit is arranged directly above the second opening.

[0007] Preferably, the shock absorption mechanism includes four groups of piston cylinders provided on the top of the bottom plate. Inside the four groups of piston cylinders, branch pipes are communicated. The four branch pipes are respectively connected to two groups of second connecting pipes. One end of the two groups of second connecting pipes is provided with a first connecting pipe. An air vent pipe is provided on the outer side wall of the first connecting pipe. One end of the air vent pipe is communicated with the air inlet pipe. Through holes are opened on the outer side walls of the four groups of piston cylinders. Piston heads are slidably arranged inside the four groups of piston cylinders. Piston rods are provided on the tops of the four piston heads. A shock absorption bracket is sleeved and installed on the outer wall of the support sleeve. One end of the piston rod penetrates through the inner top of the piston cylinder and is connected to the bottom of the shock absorption bracket. Shock absorption springs are sleeved on the outer walls of the four piston rods.

[0008] Preferably, there is a height difference between the through hole and the branch pipe, and the through hole is arranged below the side wall of the piston cylinder.

[0009] Preferably, the swing mechanism includes a second air guide cover provided on the bottom plate. The two ends of the second air guide cover are respectively connected to the second connecting pipe and the hose. A second fan blade is arranged inside the second air guide cover. A second drive shaft is provided on the side wall of the second fan blade. A support plate one is sleeved on the outer wall of the second drive shaft. One side wall of the support plate one is connected to the inner side wall of the second air guide cover. A second driving bevel gear is provided at one end of the second drive shaft. A second driven bevel gear meshing with the second driving bevel gear is arranged inside the second air guide cover. A third rotating shaft is provided on the side wall of the second driven bevel gear. A first connecting rod is arranged outside the second air guide cover. One end of the third rotating shaft penetrates through the inner side wall of the second air guide cover and is connected to the first connecting rod. One end of the first connecting rod is hinged with a second connecting rod. A third connecting rod is hinged on the top of the bottom plate. The side walls of the second connecting rod and the third connecting rod are hinged. A connecting rod is provided on the side wall of the third connecting rod. A first opening is opened on the top of the bottom plate. The air blowing pipe is rotatably connected inside the first opening. One end of the connecting rod is connected to the outer side wall of the air blowing pipe.

[0010] Preferably, two groups of guide frames are provided on the top of the bottom plate. Two groups of guide blocks slidably arranged with the guide frames are provided on the outer side wall of the air blowing pipe. The guide frames are arranged in an arc shape.

[0011] Preferably, the two control valves are respectively arranged near the two ends of the first air guide cover, and the two ends of the first connecting pipe are respectively arranged outside the two control valves.

[0012] Preferably, the two ends of the first air guide cover and the second air guide cover are both arranged in a horn shape, and the middle part is arranged in a cylindrical shape.

[0013] Preferably, one end of the air vent pipe is arranged near the first air guide cover, and one end of the air vent pipe is arranged between the first air guide cover and the control valve.

[0014] The beneficial effects of the present invention are: 1. By providing a crushing mechanism, when the present application is cleaning the expansion joint and a gravel block gets stuck in the expansion joint, the gravel block can be promptly crushed into particles. Then, a high-pressure air stream is ejected through the nozzle to blow and clean the particles, which are then adsorbed and collected by the negative pressure adsorption pipe, avoiding secondary jamming. The residues in the expansion joint can be completely cleaned in one go without the need for secondary cleaning, improving the cleaning effect of the expansion joint. 2. By providing a shock absorption mechanism, the vibration generated during the operation of the crushing mechanism can be dampened, preventing the vibration from interfering with the effect of the air stream ejected by the nozzle and reducing the impact of the vibration, further improving the cleaning effect.

[0015] 3. By providing a one-way valve, a control valve, and a first communication pipe, the present cleaning device can rationally utilize the flow rate of compressed air to provide power for the crushing mechanism and the shock absorption mechanism, achieving energy recovery and reuse. 4. By providing a swinging mechanism, which also uses the flow rate of compressed air to provide power for it without the need for a motor, reducing costs and energy consumption. The swinging mechanism can drive the nozzle to swing back and forth in the expansion joint, enabling comprehensive cleaning of the dust device in the expansion joint and improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic diagram of the overall structure of an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the crushing mechanism structure of an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention; Figure 3 is a schematic diagram of the internal structure of the support sleeve of an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention; Figure 4 is an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention Figure 2 in which the enlarged schematic diagram of the structure at A; Figure 5 is an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention Figure 2 in which the enlarged schematic diagram of the structure at B; Figure 6It is a schematic structural diagram of a swing mechanism of an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention; Figure 7 It is an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention Figure 6 The enlarged schematic diagram of the structure at C in it; Figure 8 It is a schematic structural diagram of a shock absorption mechanism of an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention; Figure 9 It is a schematic internal structure diagram of a piston cylinder of an expansion joint cleaning device for bridge maintenance provided by an embodiment of the present invention.

[0018] In the figure: 1, bottom plate; 2, negative pressure adsorption pipe; 3, shock absorption mechanism; 300, ventilation pipe; 301, shock absorption bracket; 302, first connecting pipe; 303, second connecting pipe; 304, piston cylinder; 305, branch pipe; 306, through hole; 307, piston head; 308, piston rod; 309, shock absorption spring; 4, crushing mechanism; 400, support sleeve; 401, driven pulley; 402, belt; 403, driving pulley; 404, first guide cover; 405, drill bit; 406, first rotating shaft; 407, disc; 408, positioning plate; 409, electric telescopic rod; 410, rotating column; 411, second rotating shaft; 412, first driven bevel gear; 413, first driving bevel gear; 414, first driving shaft; 415, first fan blade; 5, air inlet pipe; 6, swing mechanism; 600, second guide cover; 601, first connecting rod; 602, second connecting rod; 603, third connecting rod; 604, connecting rod; 605, guide frame; 606, guide block; 607, second fan blade; 608, second driving shaft; 609, second driving bevel gear; 610, second driven bevel gear; 611, third rotating shaft; 7, first communicating pipe; 8, second communicating pipe; 9, hose; 10, blowing pipe; 11, first opening; 12, second opening; 13, guide roller; 14, nozzle; 15, check valve; 16, control valve. Specific embodiments

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Example, refer to Figures 1-9, a device for cleaning expansion joints for bridge maintenance comprises a base plate 1 and a negative pressure adsorption tube 2 arranged on the base plate 1, the negative pressure adsorption tube 2 is connected to an external negative pressure dust suction pump, one end of the external negative pressure dust suction pump is connected to an external collection box, while the nozzle 14 blows air to clean the dust impurities in the expansion joint, the external negative pressure dust suction pump works, and can use the negative pressure adsorption tube 2 to adsorb and collect the blown dust impurities, so as to avoid secondary pollution caused by the dust impurities being raised, the base plate 1 is connected to an external mobile vehicle, the external negative pressure dust suction pump is arranged on the external mobile vehicle, guide rollers 13 are rotatably provided on both sides of the bottom of the base plate 1, an air intake pipe 5, a first connecting pipe 7 and a second connecting pipe 8 are arranged above the base plate 1, one end of the air intake pipe 5 is connected to an external air compressor, the external air compressor is placed on the external mobile vehicle, and the first connecting pipe 7 and the second connecting pipe 8 are arranged on the top of the base plate 1, The two ends of the through pipe 7 are respectively connected with the inside of the air intake pipe 5 and the second connecting pipe 8. The bottom plate 1 is provided with an air blowing pipe 10, one end of which is provided with a nozzle 14, and the other end of the air blowing pipe 10 is provided with a hose 9; the air intake pipe 5 and the second connecting pipe 8 are both provided with a control valve 16, and the first connecting pipe 7 is provided with a one-way valve 15. The top of the bottom plate 1 is provided with a swing mechanism 6, and the swing mechanism 6 is connected with the second connecting pipe 8 and the hose 9; the bottom plate 1 is provided with a crushing mechanism 4, and the crushing mechanism 4 is connected with the air intake pipe 5 and the second connecting pipe 8; the crushing mechanism 4 can crush the gravel stuck in the expansion joint; the bottom plate 1 is provided with a shock absorbing mechanism 3, and the shock absorbing mechanism 3 is connected with the air intake pipe 5; the shock absorbing mechanism 3 can damp the crushing mechanism 4.

[0021] It should be noted that the first connecting pipe 7 , the second connecting pipe 8 and the air blowing pipe 10 are all hard pipes.

[0022] The crushing mechanism 4 includes a first flow guide cover 404 provided on the bottom plate 1. Both ends of the first flow guide cover 404 are respectively connected to the intake pipe 5 and the second connecting pipe 8. A first fan blade 415 is provided inside the first flow guide cover 404. A first drive shaft 414 is provided on the side wall of the first fan blade 415. A support plate is sleeved on the outer wall of the first drive shaft 414, and the side wall of the support plate is connected to the inner side wall of the first flow guide cover 404. One end of the first drive shaft 414 is provided with a first driving bevel gear 413. A first driven bevel gear 412 meshing with the first driving bevel gear 413 is provided inside the first flow guide cover 404. A second rotating shaft 411 is provided on the top of the first driven bevel gear 412. Above the bottom plate 1, a driving pulley 403 and a driven pulley 401 are provided. A belt 402 is sleeved on the outer walls of the driving pulley 403 and the driven pulley 401. One end of the second rotating shaft 411 penetrates the inner side wall of the first flow guide cover 404 and is connected to the side wall of the driven pulley 401. Above the bottom plate 1, a support sleeve 400 is provided. A drill bit 405 is provided below the support sleeve 400. A positioning plate 408 is provided inside the support sleeve 400. A disc 407 is rotatably provided on the inner wall of the positioning plate 408. An electric telescopic rod 409 is provided at the bottom of the disc 407. One end of the electric telescopic rod 409 is provided with a rotating column 410. One end of the rotating column 410 penetrates the inner bottom of the support sleeve 400 and is connected to the drill bit 405. A first rotating shaft 406 is provided on the top of the disc 407. One end of the first rotating shaft 406 penetrates the inner top of the support sleeve 400 and is connected to the driving pulley 403.

[0023] It should be noted that: the nozzle 14 and the negative pressure adsorption pipe 2 are arranged on both sides of the bottom plate 1, and the drill bit 405 is arranged in the middle of the bottom plate 1. When encountering gravel blocks stuck in the expansion joint, the crushing mechanism 4 breaks them into particles, and then uses the high-pressure air flow sprayed by the nozzle 14 to blow and clean the particles, and then they are adsorbed and collected by the negative pressure adsorption pipe 2 to avoid secondary jamming.

[0024] The two control valves 16 are respectively arranged near both ends of the first flow guide cover 404, and both ends of the first connecting pipe 7 are respectively arranged outside the two control valves 16.

[0025] It should be noted that: when the crushing mechanism 4 does not need to crush the gravel blocks, the two control valves 16 are closed, and the one-way valve 15 is opened. The compressed air in the intake pipe 5 enters the second connecting pipe 8 from the first connecting pipe 7; when the crushing mechanism 4 needs to crush the gravel blocks, the two control valves 16 are opened, and the one-way valve 15 is closed. The compressed air in the intake pipe 5 enters the second connecting pipe 8 from the first flow guide cover 404, and can drive the first fan blade 415 to rotate by the flow rate of the compressed air, provide power, and drive the drill bit 405 to rotate and crush the gravel blocks.

[0026] The top of the bottom plate 1 is provided with a second opening 12, the drill bit 405 is matched with the second opening 12, and the drill bit 405 is arranged directly above the second opening 12.

[0027] It should be noted that: thus, the drill bit 405 can enter the expansion joint downward through the second opening 12 to break the crushed stones.

[0028] The shock absorption mechanism 3 includes four groups of piston cylinders 304 arranged on the top of the bottom plate 1. Inside each of the four piston cylinders 304, a branch pipe 305 is communicated. The four branch pipes 305 are respectively connected to two groups of second connecting pipes 303. One end of the two second connecting pipes 303 is provided with a first connecting pipe 302. An air vent pipe 300 is arranged on the outer side wall of the first connecting pipe 302. One end of the air vent pipe 300 is communicated with the air inlet pipe 5. Through holes 306 are arranged on the outer side walls of the four piston cylinders 304. Piston heads 307 are slidably arranged inside the four piston cylinders 304. Shock absorption brackets 301 are sleeved and installed on the outer walls of the support sleeves 400. One end of the piston rod 308 penetrates through the inner top of the piston cylinder 304 and is connected to the bottom of the shock absorption bracket 301. Shock absorption springs 309 are sleeved on the outer walls of the four piston rods 308.

[0029] It should be noted that: when the crushing mechanism 4 crushes the crushed stones, vibration is inevitable, which will interfere with the air flow ejected by the nozzle 14 and affect the cleaning effect. The shock absorption mechanism 3 is set to be able to shock-absorb the crushing mechanism 4 and avoid excessive vibration from affecting the cleaning effect.

[0030] One end of the air vent pipe 300 is arranged close to the first flow guide cover 404, and one end of the air vent pipe 300 is arranged between the first flow guide cover 404 and the control valve 16.

[0031] It should be noted that: when the control valve 16 is opened and the one-way valve 15 is closed, when the air inlet pipe 5 intakes air, the gas can enter the air vent pipe 300 and then enter the first connecting pipe 302.

[0032] The through hole 306 and the branch pipe 305 have a height difference, and the through hole 306 is arranged below the side wall of the piston cylinder 304.

[0033] It should be noted that: thus, the compressed air entering the piston cylinder 304 will be above the through hole 306. Therefore, the piston head 307 needs to squeeze the compressed air downward, and the compressed air is squeezed out of the through hole 306 to achieve the effect of shock absorption and energy absorption and solve the vibration generated during crushing.

[0034] The swing mechanism 6 includes a second air deflector 600 provided on the bottom plate 1. The two ends of the second air deflector 600 are respectively connected to the second connecting pipe 8 and the hose 9. A second fan blade 607 is provided inside the second air deflector 600. A second drive shaft 608 is provided on the side wall of the second fan blade 607. A first support plate is sleeved on the outer wall of the second drive shaft 608. The side wall of the first support plate is connected to the inner side wall of the second air deflector 600. A second driving bevel gear 609 is provided at one end of the second drive shaft 608. A second driven bevel gear 610 meshing with the second driving bevel gear 609 is provided inside the second air deflector 600. A third rotating shaft 611 is provided on the side wall of the second driven bevel gear 610. A first connecting rod 601 is provided outside the second air deflector 600. One end of the third rotating shaft 611 penetrates the inner side wall of the second air deflector 600 and is connected to the first connecting rod 601. One end of the first connecting rod 601 is hinged with a second connecting rod 602. The top of the bottom plate 1 is hinged with a third connecting rod 603. The side walls of the second connecting rod 602 and the third connecting rod 603 are hinged. A connecting rod 604 is provided on the side wall of the third connecting rod 603. A first opening 11 is formed at the top of the bottom plate 1. The blowing pipe 10 is rotatably connected inside the first opening 11. One end of the connecting rod 604 is connected to the outer side wall of the blowing pipe 10. Two groups of guide frames 605 are provided at the top of the bottom plate 1. Two groups of guide blocks 606 slidably arranged with the guide frames 605 are provided on the outer side wall of the blowing pipe 10. The guide frames 605 are arranged in an arc shape. With the cooperation of the guide frames 605 and the guide blocks 606, the blowing pipe 10 rotates more stably, improving the stability of the swing of the blowing pipe 10.

[0035] It should be noted that: the flow rate of the compressed air can be used to drive the rotation of the second fan blade 607 to provide power, so as to drive the rotation of the third rotating shaft 611. Then, with the cooperation of the first connecting rod 601, the second connecting rod 602 and the third connecting rod 603, the blowing pipe 10 can be driven to swing, so as to drive the nozzle 14 to swing, and the dust and impurities in the expansion joint can be blown and cleaned more comprehensively, improving the cleaning effect.

[0036] Both ends of the first air deflector 404 and the second air deflector 600 are arranged in a horn shape, and the middle part is arranged in a cylindrical shape.

[0037] It should be noted that: the air deflector is streamlined, wrapped around the periphery of the fan blade, and the inlet of the air deflector is in a horn shape and the outlet is in a tapered shape, guiding the air flow to pass through efficiently, so as to reduce the eddy current loss and accelerate the rotation of the fan blade.

[0038] The working principle of a cleaning device for bridge expansion joints: When cleaning the bridge expansion joints, the air inlet pipe 5 is connected to an air compressor, and the negative pressure adsorption pipe 2 is connected to a negative pressure dust suction pump. The guiding roller 13 is placed into the expansion joint. At this time, the bottom plate 1 is in contact with the ground. In the initial state, the control valve 16 is closed and the one-way valve 15 is open. The air compressor sends compressed air into the first connecting pipe 7 through the air inlet pipe 5, and then through the second connecting pipe 8 and the second air guide cover 600 into the hose 9 and the air blowing pipe 10. The nozzle 14 can blow out high-pressure air flow to blow and clean the dust and impurities in the expansion joint. At the same time, the negative pressure dust suction pump starts to work, which can adsorb and collect the blown dust and impurities into the collection box to achieve the cleaning of the expansion joint; When the compressed air enters the second air guide cover 600, the flow rate of the compressed air will drive the second fan blade 607 to rotate. The second fan blade 607 drives the second drive shaft 608 to rotate. The second drive shaft 608 drives the second driving bevel gear 609 to rotate. The second driving bevel gear 609 drives the second driven bevel gear 610 to rotate. The second driven bevel gear 610 drives the third rotating shaft 611 to rotate. The third rotating shaft 611 drives the first connecting rod 601 to rotate. The first connecting rod 601 drives the second connecting rod 602 to make a circular motion. The second connecting rod 602 drives the third connecting rod 603 to rotate back and forth. The third connecting rod 603 drives the connecting rod 604, the air blowing pipe 10 and the nozzle 14 to swing. The back-and-forth swing of the nozzle 14 can comprehensively blow and clean the inside of the expansion joint, improving the cleaning effect; When encountering gravel blocks stuck in the expansion joint, the two control valves 16 are opened and the one-way valve 15 is closed. The compressed air in the air inlet pipe 5 enters the second connecting pipe 8 from the first air guide cover 404, which can drive the first fan blade 415 to rotate by using the flow rate of the compressed air to provide power. The first fan blade 415 drives the first drive shaft 414 to rotate. The first drive shaft 414 drives the first driving bevel gear 413 to rotate. The first driving bevel gear 413 drives the first driven bevel gear 412 to rotate. The first driven bevel gear 412 drives the second rotating shaft 411 to rotate. The second rotating shaft 411 drives the driving pulley 403 to rotate. The driving pulley 403 drives the belt 402 to rotate. The belt 402 drives the driven pulley 401 to rotate. The driven pulley 401 drives the first rotating shaft 406 to rotate. The first rotating shaft 406 drives the disc 407 to rotate. At the same time, the electric telescopic rod 409 drives the drill bit 405 to pass through the second opening 12 into the expansion joint to contact the gravel block. The rotation of the disc 407 drives the electric telescopic rod 409 and the drill bit 405 to rotate. The drill bit 405 can break the gravel block into particles, and then use the high-pressure air flow sprayed by the nozzle 14 to blow and clean the particles (because the second air guide cover 600 is connected to the second connecting pipe 8, and the second connecting pipe 8 is used as a transmission pipeline, so the nozzle 14 will keep swinging), and then be adsorbed and collected by the negative pressure adsorption pipe 2 to avoid secondary jamming.

[0039] When the drill bit 405 breaks the stone, vibration will be generated. When breaking the crushed stone, when the compressed air passes through the control valve 16, a part of it will enter the first connecting pipe 302 through the ventilation pipe 300, and then enter the piston cylinder 304 through the second connecting pipe 303 and the branch pipe 305. When the drill bit 405 vibrates, the support sleeve 400 will drive the shock-absorbing bracket 301 to squeeze the piston rod 308 and the shock-absorbing spring 309. Thus, the piston rod 308 drives the piston head 307 to move downward to squeeze the compressed air, and the compressed air is squeezed out of the through hole 306, so as to achieve the effect of shock absorption and energy absorption, solve the vibration generated during breaking, and avoid the vibration affecting the stability of the air flow ejected from the nozzle 14.

[0040] It should be noted that the model specifications of the existing technical components in the specification need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0041] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bridge maintenance expansion joint cleaning device, comprising a base plate (1) and a negative pressure adsorption tube (2) arranged on the base plate (1), characterized in that: Guide rollers (13) are rotatably provided on both sides of the bottom of the bottom plate (1); an air intake pipe (5), a first connecting pipe (7) and a second connecting pipe (8) are provided above the bottom plate (1); both ends of the first connecting pipe (7) are respectively connected to the inside of the air intake pipe (5) and the second connecting pipe (8); an air blowing pipe (10) is provided on the bottom plate (1); a nozzle (14) is provided at one end of the air blowing pipe (10); a hose (9) is provided at the other end of the air blowing pipe (10); control valves (16) are provided inside the air intake pipe (5) and the second connecting pipe (8); a one-way valve (15) is provided inside the first connecting pipe (7); A swing mechanism (6) is provided on the top of the bottom plate (1), and the swing mechanism (6) is connected to the second connecting pipe (8) and the hose (9); A crushing mechanism (4) is provided on the bottom plate (1), the crushing mechanism (4) is connected to the air intake pipe (5) and the second connecting pipe (8), the crushing mechanism (4) can crush the broken stones stuck in the expansion joint, and a shock absorbing mechanism (3) is provided on the bottom plate (1), the shock absorbing mechanism (3) is connected to the air intake pipe (5), and the shock absorbing mechanism (3) can absorb the shock of the crushing mechanism (4).

2. The expansion joint cleaning device for bridge maintenance according to claim 1, characterized in that: The crushing mechanism (4) comprises a first air guide cover (404) provided on the bottom plate (1), the two ends of the first air guide cover (404) being connected to the air intake pipe (5) and the second connecting pipe (8) respectively, a first fan blade (415) being provided inside the first air guide cover (404), a first driving shaft (414) being provided on the side wall of the first fan blade (415), a support plate being sleeved on the outer wall of the first driving shaft (414), the side wall of the support plate being connected to the inner wall of the first air guide cover (404), a first driving bevel gear (413) being provided at one end of the first driving shaft (414), a first driven bevel gear (412) being meshed with the first driving bevel gear (413) being provided inside the first air guide cover (404), a second rotating shaft (411) being provided on the top of the first driven bevel gear (412), a driving pulley (403) and a driven pulley (401) being provided above the bottom plate (1), the driving pulley (403) and the driven pulley (401) being provided at the top of ... A belt (402) is sleeved on the outer wall of the driven pulley (401) and the first air guide cover (403); one end of the second rotating shaft (411) penetrates the inner wall of the first air guide cover (404) and is connected to the side wall of the driven pulley (401); a supporting sleeve (400) is provided above the bottom plate (1); a drill bit (405) is provided below the supporting sleeve (400); a positioning plate (408) is provided inside the supporting sleeve (400); and a rotating device (406) is provided on the inner wall of the positioning plate (408). A disc (407) is provided, an electric telescopic rod (409) is provided at the bottom of the disc (407), a rotating column (410) is provided at one end of the electric telescopic rod (409), one end of the rotating column (410) penetrates the bottom of the support sleeve (400) and is connected to the drill bit (405), and a first rotating shaft (406) is provided at the top of the disc (407), one end of the first rotating shaft (406) penetrates the top of the support sleeve (400) and is connected to the driving pulley (403).

3. The expansion joint cleaning device for bridge maintenance according to claim 2, characterized in that: The top of the bottom plate (1) is provided with a second opening (12), the drill bit (405) matches the second opening (12), and the drill bit (405) is arranged directly above the second opening (12).

4. The expansion joint cleaning device for bridge maintenance according to claim 2, characterized in that: The shock absorbing mechanism (3) comprises four groups of piston cylinders (304) provided on the top of the bottom plate (1), the four groups of piston cylinders (304) are all connected with branch pipes (305) inside, the four groups of branch pipes (305) are respectively connected with two groups of second connecting pipes (303), one end of the two groups of second connecting pipes (303) is provided with a first connecting pipe (302), the outer wall of the first connecting pipe (302) is provided with a ventilation pipe (300), one end of the ventilation pipe (300) is connected with the intake pipe (5), and the four groups of piston cylinders (304) are connected with the intake pipe (5). The outer wall of the piston cylinder (304) is provided with a through hole (306), a piston head (307) is slidably provided in the four groups of piston cylinders (304), a piston rod (308) is provided on the top of the four groups of piston heads (307), a shock absorbing bracket (301) is sleeved and installed on the outer wall of the support sleeve (400), one end of the piston rod (308) passes through the top of the piston cylinder (304) and is connected to the bottom of the shock absorbing bracket (301), and a shock absorbing spring (309) is sleeved on the outer wall of the four groups of piston rods (308).

5. The expansion joint cleaning device for bridge maintenance according to claim 4, characterized in that: The through hole (306) and the branch pipe (305) have a height difference, and the through hole (306) is arranged below the side wall of the piston cylinder (304).

6. The expansion joint cleaning device for bridge maintenance according to claim 1, characterized in that: The swing mechanism (6) comprises a second air guide cover (600) provided on the bottom plate (1), the two ends of the second air guide cover (600) being connected to the second connecting pipe (8) and the hose (9) respectively, a second fan blade (607) being provided inside the second air guide cover (600), a second drive shaft (608) being provided on the side wall of the second fan blade (607), a support plate 1 being sleeved on the outer wall of the second drive shaft (608), a side wall of the support plate being connected to the inner side wall of the second air guide cover (600), a second driving bevel gear (609) being provided at one end of the second drive shaft (608), a second driven bevel gear (610) being provided inside the second air guide cover (600) and meshing with the second driving bevel gear (609), and the second driven bevel gear (610) being meshed with the second driving bevel gear (609), A third rotating shaft (611) is provided on the side wall, a first connecting rod (601) is provided on the outer side of the second air deflector (600), one end of the third rotating shaft (611) passes through the inner side wall of the second air deflector (600) and is connected to the first connecting rod (601), one end of the first connecting rod (601) is hingedly provided with a second connecting rod (602), a third connecting rod (603) is hingedly provided on the top of the bottom plate (1), the second connecting rod (602) is hingedly connected to the side wall of the third connecting rod (603), a connecting rod (604) is provided on the side wall of the third connecting rod (603), a first opening (11) is opened on the top of the bottom plate (1), the air blowing pipe (10) is rotatably connected in the first opening (11), and one end of the connecting rod (604) is connected to the outer side wall of the air blowing pipe (10).

7. The expansion joint cleaning device for bridge maintenance according to claim 6, characterized in that: Two groups of guide frames (605) are provided on the top of the bottom plate (1), and two groups of guide blocks (606) are provided on the outer side wall of the air blowing pipe (10) so as to be slidably arranged with the guide frames (605). The guide frames (605) are arranged in an arc shape.

8. The expansion joint cleaning device for bridge maintenance according to claim 2, characterized in that: The two groups of control valves (16) are respectively arranged near the two ends of the first flow guide cover (404), and the two ends of the first connecting pipe (7) are respectively arranged outside the two groups of control valves (16).

9. The expansion joint cleaning device for bridge maintenance according to claim 2, characterized in that: Both ends of the first air guide cover (404) and the second air guide cover (600) are arranged in a trumpet shape, and the middle is arranged in a cylindrical shape.

10. The expansion joint cleaning device for bridge maintenance according to claim 4, characterized in that: One end of the ventilation pipe (300) is arranged close to the first flow guide cover (404), and one end of the ventilation pipe (300) is arranged between the first flow guide cover (404) and the control valve (16).

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