Crack detection equipment for roadbed maintenance

Abstract

The invention discloses crack detection equipment for roadbed maintenance, which comprises an air injection storage mechanism, the air injection storage mechanism comprises a bearing platform, and the inner side of the bearing platform is provided with a crack detection mechanism; the top of the bearing platform is fixedly connected with a storage top frame by forming an opening, and a drawing opening is formed in the surface of the storage top frame. According to the crack detection equipment for roadbed maintenance, an air injection storage mechanism and a crack detection mechanism are combined for use, and through the arrangement of the two mechanisms, when the crack detection equipment is not used, a crack detector and a high-pressure spray head can be stored in a storage top frame, so that an enough high distance is formed between the crack detection equipment and the ground, and daily transportation is facilitated; when detection is needed, the electric telescopic rod pushes the lifting storage frame to descend, so that the crack detector is close to the ground, and meanwhile, the drawing inner frame is locked through cooperation of the structures.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed maintenance, in particular to crack detection equipment for roadbed maintenance. Background Art

[0002] Roadbed maintenance is a regular maintenance work to keep the roadbed and its ancillary equipment in a solid and stable state to ensure unimpeded traffic. It includes daily inspection and observation of deformation of various parts of the roadbed, timely prevention and treatment of diseases. In order to be able to detect cracks in the roadbed in time and repair them, it is necessary to use a crack detector for detection. When the existing detector detects roadbed cracks, when the cracks are filled with sand and gravel particles, the cracks appear flat, and it is difficult to perform accurate detection directly using a detection probe. Patent documents have been made to improve this.

[0003] For example, Chinese patent CN221167363U, a highway roadbed crack detection device, relates to the technical field of crack detection devices, the utility model includes a main body mechanism, including a support plate and a placement frame box, the lower surface of the placement frame box is fixedly connected to the upper surface of the support plate; a high-pressure mechanism, including a vent pipe arranged below the support plate, the lower part of the vent pipe is connected to the outside with a plurality of gas nozzles, and a mounting assembly is arranged above the vent pipe; a marking mechanism, including a storage cylinder arranged on one side of the detection instrument, and a mounting slot is arranged on the upper surface of the support plate. The utility model is a highway roadbed crack detection device, before detecting the roadbed cracks, the staff drives the high-pressure air pump with a first controller, further transports the high-pressure gas to the vent pipe through the connecting pipe through the action of the high-pressure air pump, and then sprays the high-pressure gas on the roadbed surface through the action of the gas nozzle, which is convenient for cleaning the filling particles in the cracks and facilitating accurate crack detection.

[0004] Although the equipment in the above document can use high-pressure gas to clean the cracks and mark them, it still has obvious defects in actual use, such as: When the crack detector is in use, it needs to be close to the ground, and the nozzle in the device also needs to be close to the ground. Although this setting is convenient for detection, the device is in a closed state when not detecting. At this time, the nozzle no longer sprays high-pressure gas. When the device is pushed to move, if there are large stones or protrusions on the ground, it is easy to cause wear to the nozzle and the detection equipment, shortening their service life; Therefore, a roadbed maintenance crack detection device that can improve protection is now designed to solve such defects. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a crack detection device for roadbed maintenance, which solves the problem that the prior crack detection device is easily scratched and damaged during transportation.

[0006] To achieve the above object, the present invention is implemented by the following technical solutions: A crack detection device for roadbed maintenance, comprising an air jet receiving mechanism, the air jet receiving mechanism comprising a load-bearing platform, and a crack detection mechanism is installed on the inner side of the load-bearing platform; The top of the storage top frame is fixedly connected to the storage top frame by opening, a pull-out opening is provided on the surface of the storage top frame, the front and rear parts of both sides of the inner cavity of the load-bearing platform are fixedly connected to side sliding frames, both sides of the top of the inner cavity of the load-bearing platform are fixedly connected to arc-shaped racks through fixing plates, the top of the load-bearing platform is fixedly connected to an electric telescopic rod by opening, the front parts of both sides of the top of the load-bearing platform are fixedly connected to the first sliding frame, and the bottom of the inner cavity of the first sliding frame is provided with positioning holes.

[0007] Preferably, the rear portion of the load-bearing platform is fixedly connected to a high-pressure air pump via a fixing plate, and air ducts are fixedly connected to both sides of the top of the high-pressure air pump, and one end of the air duct away from the high-pressure air pump passes through the load-bearing platform and extends to the inner side of the load-bearing platform.

[0008] Preferably, a protective frame is fixedly connected to the top of the storage top frame, and transverse guide rods are slidably installed on both sides of the rear part of the inner cavity of the protective frame through openings, and the rear end of the transverse guide rods is fixedly connected to a sloped guide plate through a fixing plate, and a display screen is fixedly connected between the front ends of the two transverse guide rods and located on the inner side of the protective frame, and a first spring is sleeved on the surface of the transverse guide rod and located on the inner side of the protective frame.

[0009] Preferably, rectangular guide openings are provided on both sides of the top of the load-bearing platform and at the lower part of the inclined guide plate, and load-bearing wheels are installed at the front and rear parts of the bottom of the load-bearing platform.

[0010] Preferably, the crack detection mechanism includes four L-shaped sliding bars, which are slidably installed on the inner sides of four side sliding frames respectively, the bottom ends of the L-shaped sliding bars are fixedly connected with a lifting storage frame, both sides of the bottom of the inner cavity of the lifting storage frame are fixedly connected with a second sliding frame, a sliding strip plate is slidably installed on the inner side of the second sliding frame, the top of the sliding strip plate is fixedly connected with a pull-out inner frame used in conjunction with the pull-out opening, the bottom of the inner cavity of the pull-out inner frame is fixedly connected with a crack detector, both sides of the pull-out inner frame are provided with a first side hole, and both sides of the inner cavity of the lifting storage frame are provided with a second side hole used in conjunction with the first side hole.

[0011] Preferably, both sides of the top of the pull-out inner frame are fixedly connected with vertical plug-in cylinders, a sealing plate is provided on the inner side of the pull-out opening, a plug-in rod handle used in conjunction with the positioning socket is slidably mounted on the surface of the sealing plate, and the bottom end of the plug-in rod handle extends to the inner side of the positioning socket, and both sides of the rear part of the sealing plate are fixedly connected with L-shaped plug-in rods used in conjunction with the vertical plug-in cylinders.

[0012] Preferably, both sides of the top of the lifting storage frame are fixedly connected with T-shaped support plates, one side of the T-shaped support plate is fixedly connected with a three-rod support plate, the surface of the three-rod support plate is slidably mounted with a side plate, the opposite sides of the two side plates are fixedly connected with a round plug rod used in conjunction with the first side hole and the second side hole, and the surface of the three-rod support plate is sleeved with a second spring.

[0013] Preferably, the rear side of the top of the lifting storage frame is fixedly connected to a top pressing cross plate through a bracket, and both sides of the bottom of the top pressing cross plate are fixedly connected to lifting and pressing rods, and a curved frame is slidably installed between the surfaces of the two lifting and pressing rods, and a third spring is sleeved on the surface of the lifting and pressing rod and located on the upper part of the curved frame, and universal wheels are fixedly installed on both sides of the bottom of the curved frame.

[0014] Preferably, the surface of the curved frame is slidably mounted with an inclined panel rod by opening an opening, and a plurality of inclined panel rods are provided, a linkage plate is fixedly connected to the rear end of the inclined panel rod, a high-pressure nozzle is fixedly connected to the surface of the linkage plate by opening an opening, and the front end of the high-pressure nozzle penetrates the curved frame and extends to the rear of the curved frame, and one end of the air guide pipe extends to the inside of the load-bearing platform and is connected to the high-pressure nozzle.

[0015] Preferably, a cross-section plate is fixedly connected between the two front L-shaped sliding rods, and the bottom end of the electric telescopic rod is fixedly connected to the top of the cross-section plate through a fixed plate, and both sides of the top of the cross-section plate are fixedly connected with round-headed top rods used in conjunction with the rectangular guide port and the inclined guide plate.

[0016] Beneficial Effects The present invention provides a crack detection device for roadbed maintenance. Compared with the existing technology, it has the following beneficial effects: (1) The crack detection equipment for roadbed maintenance uses a jet storage mechanism and a crack detection mechanism in combination. The two mechanisms can be set up to store the crack detector and the high-pressure nozzle inside the storage top frame when not in use, so that they have a sufficiently high distance from the ground, which is convenient for daily transportation. When detection is required, the electric telescopic rod pushes the lifting storage frame down to bring the crack detector closer to the ground. At the same time, the pull-out inner frame is locked by the coordination between the structures, and the high-pressure nozzle is extended forward to clean dust and stone particles, which not only ensures the smooth operation of the detection work, but also provides protection for the daily transportation of the equipment.

[0017] (2) The crack detection equipment for roadbed maintenance is installed with an electric telescopic rod on the top of the load-bearing platform, and the bottom end of the electric telescopic rod is connected to the cross-section plate, and is used in combination with an inclined panel rod and a side plate. The arrangement of these structures enables the electric telescopic rod to push the lifting storage frame to drive the crack detector to descend to the ground during detection, and the arc-shaped plug-in frame is separated from the side plate during the descent process, so that the round plug-in rod can be inserted into the first side hole and the second side hole to fix the pull-out inner frame, thereby ensuring the stability of the crack detector during detection. In addition, the inclined panel rod can abut against the storage top frame when the lifting storage frame rises to drive the high-pressure nozzle to retract and limit, thereby avoiding the high-pressure nozzle from colliding with the storage top frame, effectively improving the protection of the crack detector and the high-pressure nozzle, and making it have a longer service life.

[0018] (3) The crack detection equipment for roadbed maintenance is used by installing an inclined guide plate at the rear end of the transverse guide rod and in combination with a round-headed top rod. The arrangement of these structures allows the round-headed top rod to separate from the inclined guide plate when the lifting storage frame descends, thereby allowing the display screen to extend from the inside of the protective frame to facilitate real-time observation by the staff. After the lifting storage frame rises, the round-headed top rod can be used to push up the inclined guide plate, thereby using the guidance of the inclined guide plate to drive the display screen to retract to the inside of the protective frame for storage, thereby avoiding being constantly disturbed by the outside. The entire process does not require the staff to perform too much operation and is sufficient for current use.

[0019] (4) The crack detection equipment for roadbed maintenance is used by installing a vertical plug-in cylinder on the top of the lifting storage frame and using it in combination with an L-shaped plug-in rod. The arrangement of these structures enables the vertical plug-in cylinder to dock with the L-shaped plug-in rod after the lifting storage frame rises. Then, the staff can use the plug-in rod handle, the first sliding frame and the second sliding frame to guide the pull-out inner frame and the crack detector as a whole from the inner side of the storage top frame, thereby facilitating the maintenance and storage of the electronic equipment and demonstrating the overall practicality and functionality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 A bottom view of the jet receiving mechanism and crack detection mechanism structure of the present invention; Figure 3 It is a cross-sectional view of the load-bearing platform and the storage top frame structure of the present invention; Figure 4 It is a schematic diagram of the structure of the jet storage mechanism of the present invention; Figure 5 It is a schematic diagram of the inclined guide plate, the display screen and the first spring structure of the present invention; Figure 6 A schematic diagram of the crack detection mechanism structure of the present invention; Figure 7 It is a schematic diagram of the sealing plate, L-shaped plug rod and plug rod handle structure of the present invention; Figure 8 It is a schematic diagram of the crack detector, the first side hole and the vertical insert structure of the present invention; Fig. 9 It is a schematic diagram of the L-shaped sliding rod, the lifting storage frame and the second sliding frame structure of the present invention; Fig.10 It is a schematic diagram of the three-rod support plate, side plate and round plug-in rod structure of the present invention; Fig.11 It is a schematic diagram of the top pressure plate, the lifting and pressing rod and the bent frame structure of the present invention; Fig.12 It is a schematic diagram of the linkage plate, the fourth spring and the high-pressure nozzle structure of the present invention.

[0021] In the figure: 1, jet storage mechanism; 2, crack detection mechanism; 101, load-bearing platform; 102, storage top frame; 103, drawer opening; 104, side sliding frame; 105, arc-shaped plug-in rack; 106, electric telescopic rod; 107, high-pressure air pump; 108, air guide tube; 109, first sliding frame; 110, positioning jack; 111, protection frame; 112, transverse guide rod; 113, inclined guide plate; 114, display screen; 115, first spring; 116, rectangular guide opening; 117, load-bearing wheel; 201, L-shaped slide bar; 202, lifting storage frame; 203, second sliding frame; 204, slide plate; 2 05. Pull-out inner frame; 206. Crack detector; 207. First side hole; 208. Second side hole; 209. Vertical plug-in tube; 210. Sealing plate; 211. L-shaped plug-in rod; 212. Plug-in rod handle; 213. T-shaped support plate; 214. Three-rod support plate; 215. Side plate; 216. Round plug-in rod; 217. Second spring; 218. Top cross plate; 219. Lifting and pressing rod; 220. Bending frame; 221. Third spring; 222. Inclined panel rod; 223. Linkage plate; 224. Fourth spring; 225. High-pressure nozzle; 226. Universal wheel; 227. Cross-section plate; 228. Round head top rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-12, the present invention provides a technical solution: a crack detection device for roadbed maintenance, comprising an air jet receiving mechanism 1, the air jet receiving mechanism 1 comprising a load-bearing platform 101, and a crack detection mechanism 2 is installed on the inner side of the load-bearing platform 101; Please refer to Figure 3 , Figure 4 and Figure 5 , showing the overall structure of the jet storage mechanism 1, the top of the load-bearing platform 101 is fixedly connected to a storage top frame 102 through an opening, and a pull-out opening 103 is provided on the surface of the storage top frame 102, the front and rear parts of both sides of the inner cavity of the load-bearing platform 101 are fixedly connected to side sliding frames 104, both sides of the top of the inner cavity of the load-bearing platform 101 are fixedly connected to arc-shaped plug-in frames 105 through fixed plates, the top of the load-bearing platform 101 is fixedly connected to an electric telescopic rod 106 through an opening, the front parts of both sides of the top of the load-bearing platform 101 are fixedly connected to first sliding frames 109, and a positioning socket 110 is provided at the bottom of the inner cavity of the first sliding frame 109, the rear part of the storage top frame 102 is fixedly connected to a high-pressure air pump 107 through a fixed plate, and both sides of the top of the high-pressure air pump 107 are fixedly connected to an air guide pipe 1 08, and one end of the air guide pipe 108 away from the high-pressure air pump 107 passes through the load-bearing platform 101 and extends to the inner side of the load-bearing platform 101, and the top of the storage top frame 102 is fixedly connected with a protective frame 111, and both sides of the rear part of the inner cavity of the protective frame 111 are slidably installed with transverse guide rods 112 through openings, and the rear end of the transverse guide rods 112 is fixedly connected with an inclined guide plate 113 through a fixing plate, and a display screen 114 is fixedly connected between the front ends of the two transverse guide rods 112 and located on the inner side of the protective frame 111, and a first spring 115 is sleeved on the surface of the transverse guide rods 112 and located on the inner side of the protective frame 111, and rectangular guide openings 116 are opened on both sides of the top of the load-bearing platform 101 and at the lower part of the inclined guide plate 113, and load-bearing wheels 117 are installed at the front and rear of the bottom of the load-bearing platform 101.

[0024] When in use, first use the load-bearing wheels 117 to push the equipment to the top of the roadbed, then start the electric telescopic rod 106 to push the cross-section plate 227 to let the lifting storage frame 202 drop in the limit of the L-shaped sliding rod 201, and when the lifting storage frame 202 drops, the arc-shaped plug-in frame 105 will separate from the side sticker 215. At this time, the side sticker 215 loses its limit and moves toward the lifting storage frame 202 under the elastic force of the second spring 217. Finally, the round plug rod 216 is inserted into the inner side of the first side hole 207 and the second side hole 208 to lock the pull-out inner frame 205 to the inner side of the lifting storage frame 202. As the lifting storage frame 202 continues to drop, when the inclined panel rod 222 is completely lowered to the bottom of the load-bearing platform 101, the inclined panel rod 222 loses its limit and drives the high-pressure nozzle 225 to extend and expand forward under the elastic force of the fourth spring 224 until the universal wheel 226 drops and When the electric telescopic rod 106 contacts the ground, the crack detector 206 inside the lifting storage frame 202 also approaches the ground. At the same time, the lifting storage frame 202 drives the round head push rod 228 to descend and separate from the inclined guide plate 113. Then the display screen 114 moves out of the protection frame 111 under the elastic force of the first spring 115. Then the crack detector 206, the display screen 114 and the high-pressure air pump 107 are started and the equipment is pushed forward, so that the crack detector 206 detects cracks on the roadbed, and the display screen 114 is used to check the detection results. During the detection process, the high-pressure air pump 107 allows the high-pressure nozzle 225 to spray high-pressure air to the ground through the air guide pipe 108, so as to clean the dust and stone particles on the ground for easy detection. If the universal wheel 226 encounters a protrusion on the ground, it can drive the high-pressure nozzle 225 to rise without causing it to conflict.

[0025] Please refer to Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 and Fig.12, showing the overall structure of the crack detection mechanism 2, the crack detection mechanism 2 includes four L-shaped slide bars 201, the four L-shaped slide bars 201 are slidably installed on the inner sides of the four side slide frames 104, the bottom ends of the L-shaped slide bars 201 are fixedly connected with a lifting storage frame 202, both sides of the bottom of the inner cavity of the lifting storage frame 202 are fixedly connected with a second sliding frame 203, the inner side of the second sliding frame 203 is slidably installed with a sliding strip 204, the top of the sliding strip 204 is fixedly connected with a pull-out inner frame 205 used in conjunction with the pull-out opening 103, and the bottom of the inner cavity of the pull-out inner frame 205 is fixedly connected with a crack detector 206 The crack detector 206 is a SL-GPR wireless ground penetrating radar. First side holes 207 are provided on both sides of the pull-out inner frame 205. Second side holes 208 used in conjunction with the first side holes 207 are provided on both sides of the inner cavity of the lifting storage frame 202. Vertical plug-in tubes 209 are fixedly connected to both sides of the top of the pull-out inner frame 205. A sealing plate 210 is provided on the inner side of the pull-out opening 103. A plug-in handle 212 used in conjunction with the positioning socket 110 is slidably installed on the surface of the sealing plate 210. The bottom end of the plug-in handle 212 extends to the inner side of the positioning socket 110. The rear of the sealing plate 210 is fixedly connected to the vertical plug-in tube 209. Both sides are fixedly connected with L-shaped plug rods 211 used in conjunction with the vertical plug tube 209, both sides of the top of the lifting storage frame 202 are fixedly connected with T-shaped support plates 213, one side of the T-shaped support plate 213 is fixedly connected with a three-rod support plate 214, and a side plate 215 is slidably installed on the surface of the three-rod support plate 214. The opposite sides of the two side plates 215 are fixedly connected with round plug rods 216 used in conjunction with the first side hole 207 and the second side hole 208, and the surface of the three-rod support plate 214 is sleeved with a second spring 217. The rear side of the top of the lifting storage frame 202 is fixedly connected with a top pressing horizontal plate 218 through a bracket. Both sides of the bottom of the top horizontal plate 218 are fixedly connected with lifting and pressing rods 219, a curved frame 220 is slidably installed between the surfaces of the two lifting and pressing rods 219, a third spring 221 is sleeved on the surface of the lifting and pressing rod 219 and located on the upper part of the curved frame 220, universal wheels 226 are fixedly installed on both sides of the bottom of the curved frame 220, an inclined panel rod 222 is slidably installed on the surface of the curved frame 220 through an opening, and a plurality of inclined panel rods 222 are provided, a linkage plate 223 is fixedly connected to the rear end of the inclined panel rod 222, and a high-pressure nozzle 225 is fixedly connected to the surface of the linkage plate 223 through an opening. The front end of the high-pressure nozzle 225 passes through the curved frame 220 and extends to the rear of the curved frame 220. The air guide pipe 108 extends to one end inside the load-bearing platform 101 and is connected to the high-pressure nozzle 225. A cross-plate 227 is fixedly connected between the two front L-shaped sliding rods 201, and the bottom end of the electric telescopic rod 106 is fixedly connected to the top of the cross-plate 227 through a fixed plate. Both sides of the top of the cross-plate 227 are fixedly connected with round-headed top rods 228 used in conjunction with the rectangular guide port 116 and the inclined guide plate 113.

[0026] After the detection is completed, the electric telescopic rod 106 is started to pull the lifting storage frame 202 up, and the rise of the lifting storage frame 202 will use the top pressure cross plate 218 to synchronously drive the bending frame 220 to rise. When the bending frame 220 rises, several inclined panel rods 222 will conflict with the inner wall of the storage top frame 102, thereby pushing the high-pressure nozzle 225 to retract backwards. As the electric telescopic rod 106 drives the lifting storage frame 202 to completely return to the inside of the storage top frame 102, at the same time, the top of the round head top rod 228 passes through the rectangular guide port 116 to squeeze the inclined guide plate 113, so that the first spring 115 pulls the display screen 114 to be located inside the protective frame 111 for storage and protection, and the L-shaped plug rod 211 is also inserted into the inner side of the vertical plug cylinder 209. In this process, the arc plug frame 10 5 will be inserted into the inside of the side sticking plate 215 and squeeze the side sticking plate 215 away from the lifting storage frame 202, so that the round plug rod 216 can be pulled out from the inside of the first side hole 207 and the second side hole 208. At this time, the inner frame 205 is pulled out and locked, and the equipment can be pushed and transported at any time. If it is necessary to maintain the crack detector 206, it is only necessary to pull the plug handle 212 to pull it out from the inside of the positioning plug hole 110, and then pull the plug handle 212 forward to drive the inner frame 205 to be pulled out from the inside of the storage top frame 102 under the limitation of the L-shaped plug rod 211 and the vertical plug tube 209, and the sliding strip plate 204 uses the second sliding frame 203 and the first sliding frame 109 for guiding and limiting. After the maintenance is completed, the crack detector 206 is reinstalled and recovered into the inside of the storage top frame 102.

[0027] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A crack detection device for roadbed maintenance, comprising an air jet receiving mechanism (1), characterized in that: The jet storage mechanism (1) comprises a load-bearing platform (101), and a crack detection mechanism (2) is installed on the inner side of the load-bearing platform (101); The top of the load-bearing platform (101) is fixedly connected to a storage top frame (102) via an opening, a pull-out opening (103) is provided on the surface of the storage top frame (102), the front and rear portions of both sides of the inner cavity of the load-bearing platform (101) are fixedly connected to side sliding frames (104), both sides of the top of the inner cavity of the load-bearing platform (101) are fixedly connected to arc-shaped plug-in racks (105) via fixing plates, the top of the load-bearing platform (101) is fixedly connected to an electric telescopic rod (106) via an opening, the front portions of both sides of the top of the load-bearing platform (101) are fixedly connected to a first sliding frame (109), and a positioning socket (110) is provided at the bottom of the inner cavity of the first sliding frame (109).

2. A crack detection device for roadbed maintenance according to claim 1, characterized in that: The rear portion of the storage top frame (102) is fixedly connected to a high-pressure air pump (107) via a fixing plate, and both sides of the top of the high-pressure air pump (107) are fixedly connected to air guide pipes (108), and one end of the air guide pipe (108) away from the high-pressure air pump (107) passes through the load-bearing platform (101) and extends to the inner side of the load-bearing platform (101).

3. A crack detection device for roadbed maintenance according to claim 2, characterized in that: The top of the storage top frame (102) is fixedly connected to a protective frame (111); transverse guide rods (112) are slidably mounted on both sides of the rear portion of the inner cavity of the protective frame (111) through openings; the rear ends of the transverse guide rods (112) are fixedly connected to an inclined guide plate (113) through a fixing plate; a display screen (114) is fixedly connected between the front ends of the two transverse guide rods (112) and located on the inner side of the protective frame (111); and a first spring (115) is sleeved on the surface of the transverse guide rod (112) and located on the inner side of the protective frame (111).

4. A crack detection device for roadbed maintenance according to claim 3, characterized in that: Rectangular guide openings (116) are provided on both sides of the top of the load-bearing platform (101) and at the bottom of the inclined guide plate (113), and load-bearing wheels (117) are installed at the front and rear of the bottom of the load-bearing platform (101).

5. A crack detection device for roadbed maintenance according to claim 4, characterized in that: The crack detection mechanism (2) comprises four L-shaped sliding bars (201), the four L-shaped sliding bars (201) being slidably mounted on the inner sides of four side sliding frames (104), the bottom ends of the L-shaped sliding bars (201) being fixedly connected to a lifting storage frame (202), both sides of the bottom of the inner cavity of the lifting storage frame (202) being fixedly connected to a second sliding frame (203), a sliding strip plate (204) being slidably mounted on the inner side of the second sliding frame (203), a drawable inner frame (205) being fixedly connected to the top of the sliding strip plate (204) for use in conjunction with the drawable opening (103), a crack detector (206) being fixedly connected to the bottom of the inner cavity of the drawable inner frame (205), first side holes (207) being provided on both sides of the drawable inner frame (205), and second side holes (208) being provided on both sides of the inner cavity of the lifting storage frame (202) for use in conjunction with the first side holes (207).

6. A crack detection device for roadbed maintenance according to claim 5, characterized in that: Both sides of the top of the drawer inner frame (205) are fixedly connected with vertical plug-in tubes (209), and a sealing plate (210) is provided on the inner side of the drawer opening (103). A plug-in rod handle (212) for use with the positioning socket (110) is slidably mounted on the surface of the sealing plate (210), and the bottom end of the plug-in rod handle (212) extends to the inner side of the positioning socket (110). Both sides of the rear of the sealing plate (210) are fixedly connected with L-shaped plug-in rods (211) for use with the vertical plug-in tube (209).

7. A crack detection device for roadbed maintenance according to claim 6, characterized in that: Both sides of the top of the lifting storage frame (202) are fixedly connected with T-shaped support plates (213), one side of the T-shaped support plate (213) is fixedly connected with a three-rod support plate (214), a side plate (215) is slidably mounted on the surface of the three-rod support plate (214), and opposite sides of the two side plates (215) are fixedly connected with round plug rods (216) used in conjunction with the first side hole (207) and the second side hole (208), and a second spring (217) is sleeved on the surface of the three-rod support plate (214).

8. A crack detection device for roadbed maintenance according to claim 7, characterized in that: The rear side of the top of the lifting storage frame (202) is fixedly connected to a top pressing plate (218) via a bracket, and both sides of the bottom of the top pressing plate (218) are fixedly connected to lifting and pressing rods (219), and a curved frame (220) is slidably installed between the surfaces of the two lifting and pressing rods (219), and a third spring (221) is sleeved on the surface of the lifting and pressing rod (219) and located on the upper part of the curved frame (220), and universal wheels (226) are fixedly installed on both sides of the bottom of the curved frame (220).

9. A crack detection device for roadbed maintenance according to claim 8, characterized in that: The surface of the curved frame (220) is slidably mounted with an inclined panel rod (222) through an opening, and a plurality of inclined panel rods (222) are provided. A linkage plate (223) is fixedly connected to the rear end of the inclined panel rod (222). A high-pressure nozzle (225) is fixedly connected to the surface of the linkage plate (223) through an opening, and a front end of the high-pressure nozzle (225) penetrates the curved frame (220) and extends to the rear of the curved frame (220). One end of the air guide pipe (108) extending to the inside of the load-bearing platform (101) is connected to the high-pressure nozzle (225).

10. A crack detection device for roadbed maintenance according to claim 9, characterized in that: A cross-section plate (227) is fixedly connected between the two front L-shaped sliding rods (201), and the bottom end of the electric telescopic rod (106) is fixedly connected to the top of the cross-section plate (227) via a fixing plate, and round-headed top rods (228) used in conjunction with the rectangular guide opening (116) and the inclined guide plate (113) are fixedly connected to both sides of the top of the cross-section plate (227).

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