Flatness detection device for asphalt pavement construction

Abstract

The utility model provides a flatness detection device for asphalt pavement construction, which relates to the technical field of asphalt pavements and comprises a base plate, a reference frame fixedly mounted on the top surface of the base plate, a support frame fixedly mounted on the top surface of the base plate, and a plurality of rollers rotatably connected to the bottom surface of the base plate through a suspension system and used for assisting the movement of the base plate. A mounting plate is slidably connected to the interior of the supporting frame, and a handrail for being held by a person is fixedly mounted on the top surface of the base plate; the anti-separation mechanism is arranged on the top surface of the base plate and used for preventing the roller from being separated from the asphalt pavement, and the base plate, the detection wheel, the driving motor, the impeller, the air inlet hopper, the connecting box, the connecting pipe, the fixing pipe and the supporting box are matched with one another, so that the asphalt pavement can be adsorbed, and the roller on the base plate is tightly attached to the asphalt pavement; the roller is prevented from being separated from asphalt due to the fact that the output direction of the base plate is not parallel to the asphalt pavement, and the accuracy of detecting the flatness of the asphalt pavement is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt pavement, in particular to a flatness detection device used for asphalt pavement construction. Background Art

[0002] Asphalt pavement refers to the road surface layer that is paved by mixing asphalt as a binder with aggregates (such as crushed stone, sand, etc.). Asphalt pavement has good water resistance, skid resistance, durability, and convenience in construction and maintenance. Therefore, it is widely used in the construction of transportation facilities such as highways, urban roads, and airport runways. The main types of asphalt pavement include hot mix asphalt concrete, cold mix asphalt mixture, asphalt surface treatment, etc.

[0003] After searching, it is found that the Chinese patent with the announcement number CN219886517U in the prior art proposes a device for detecting the flatness of the loose layer of asphalt pavement. The patent rolls a roller on the surface of the pavement, so that the roller marks the depressions and protrusions of the pavement by using marking powder, which can avoid damage to the pavement caused by hitting. At the same time, the colored marking powder is more eye-catching, which is convenient for subsequent search for the mark. The patent uses a roller to roll on the asphalt pavement when detecting the flatness of the asphalt pavement. Since the staff drives the car plate and the roller to roll on the asphalt pavement by pushing the push handle, in this process, the output direction of the staff's hand thrust may sometimes not be parallel to the asphalt pavement, resulting in the wheel under the car plate may be separated from the asphalt pavement. The separation of the wheel from the asphalt pavement causes the roller to move up and down when it does not encounter uneven places, which makes the measurement effect of the flatness of the asphalt pavement worse and the accuracy is low. Therefore, it is necessary to provide a new flatness detection device for asphalt pavement construction to solve the above technical problems. Summary of the invention

[0004] The technical problem solved by the utility model is to provide a flatness detection device used for asphalt pavement construction.

[0005] In order to solve the above technical problems, the utility model provides a flatness detection device for asphalt pavement construction, comprising a base plate, a reference frame is fixedly installed on the top surface of the base plate, a support frame is fixedly installed on the top surface of the base plate, the bottom surface of the base plate is rotatably connected to a plurality of rollers for assisting the movement of the base plate through a suspension system, a mounting plate is slidably connected inside the support frame, a handrail for a person to hold is fixedly installed on the top surface of the base plate; an anti-detachment mechanism is arranged on the top surface of the base plate, and is used to prevent the roller from detaching from the asphalt pavement; the top surface of the base plate slides The measuring column is rotatably connected to the base frame, the bottom surface of the measuring column is fixedly mounted with a support frame, the inside of the support frame is rotatably connected with a detection wheel, the outer circumferential wall surface of the measuring column is sleeved with a spring, one end of the spring is fixedly connected to the bottom surface of the base frame, the other end of the spring is fixedly connected to the top surface of the support frame, the upper end of the measuring column passes through the reference frame and extends to the outside of the reference frame, the anti-separation mechanism includes a support box, the support box is fixedly mounted on the top surface of the base frame, the top surface of the base frame is rotatably connected with an impeller for suction, and the top surface of the support box is equipped with a The impeller is driven by a driving motor, the bottom surface of the driving shaft of the driving motor passes through the supporting box and is fixedly connected to the top surface of the impeller, the bottom surface of the base plate is fixedly installed with a connecting box, the bottom surface of the connecting box is fixedly installed with a fixing pipe, the outer circumferential wall surface of the fixing pipe is movably sleeved with a connecting pipe, the lower end of the connecting pipe is fixedly installed with an air intake hopper, the interior of the air intake hopper is fixedly sleeved with a filter for blocking debris, the bottom surface of the base plate is slidably connected with a rack, the bottom surface of the base plate is fixedly installed with an electric push rod for driving the rack to move, one end of the telescopic shaft of the electric push rod is connected to the gear One side of the strip is fixedly connected, the bottom surface of the base plate is fixedly installed with a rotating seat, the interior of the rotating seat is rotatably connected with a connecting rod 1, the lower end of the connecting rod 1 is rotatably connected with a connecting rod 2, two connecting blocks are fixedly installed on the top surface of the air intake hopper, the lower end of the connecting rod 2 is rotatably connected to the two connecting blocks, one side of the connecting rod 1 is coaxially connected with a gear, the rack is meshingly connected with the gear, one side of the support box is fixedly installed with an outlet pipe for exhausting air, the interior of the outlet pipe is fixedly installed with a support plate, and the top surface of the support plate is rotatably connected with a plurality of fans for guiding airflow.

[0006] Preferably, two base blocks are fixedly mounted on the bottom surface of the base plate, a limiting rod is fixedly mounted between the two base blocks, a limiting block is fixedly mounted on one side of the rack, and the limiting block is slidably connected to the limiting rod.

[0007] Preferably, a screw rod is rotatably connected inside the support frame, the lower end of the screw rod is rotatably connected to the inner bottom surface of the support frame, the upper end of the screw rod passes through the support frame and is fixedly mounted with a handwheel, the mounting plate is threadedly connected to the screw rod, a pressure sensor is fixedly mounted on the bottom surface of the mounting plate, and an alarm for alarm is fixedly mounted on the top surface of the base plate.

[0008] Preferably, support holes are provided on both sides of the support frame, and limiting blocks are fixedly installed on both sides of the mounting plate, and the limiting blocks are slidably connected to the support holes.

[0009] Compared with the related art, the flatness detection device for asphalt pavement construction provided by the utility model has the following beneficial effects:

[0010] The asphalt pavement can be adsorbed by the cooperation of the substrate, detection wheel, drive motor, impeller, air intake hopper, connection box, connection pipe, fixed pipe and support box, so that the roller on the substrate is closely attached to the asphalt pavement, preventing the roller from being separated from the asphalt due to the force direction of the substrate being not parallel to the asphalt pavement, thereby improving the accuracy of the asphalt pavement flatness detection;

[0011] Through the cooperation of the support box, the air outlet pipe, the support plate and the fan, the pebbles on the asphalt road surface can be blown away, the accuracy of the asphalt road surface flatness detection can be further improved, and the air extracted by the impeller can be reasonably utilized;

[0012] By cooperating with the electric push rod, rack, gear, connecting rod one, connecting rod two, connecting block, rotating seat and air intake hopper, the gap between the air intake hopper and the asphalt pavement can be adjusted according to the condition of the asphalt pavement, so that the roller will not separate from the asphalt pavement when the staff pushes the base plate to move on the asphalt pavement, reducing the erroneous movement of the measuring column, achieving the effect of preventing the roller and the asphalt pavement from separating, and helping the staff to detect the flatness of the asphalt pavement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0014] Figure 2 It is a schematic diagram of the installation structure of the air outlet pipe and the support box of the utility model;

[0015] Figure 3 It is a bottom view schematic diagram of the connection structure of the fixed pipe and the connecting pipe of the utility model;

[0016] Figure 4 for Figure 3 Schematic diagram of the local structure of A;

[0017] Figure 5It is a bottom view schematic diagram of the connection structure of the mounting plate and the support frame of the utility model.

[0018] Numbers in the figure: 1. Base plate; 2. Reference frame; 3. Support frame; 4. Roller; 5. Anti-separation mechanism; 6. Support box; 7. Exhaust pipe; 8. Support plate; 9. Fan; 10. Inlet hopper; 11. Connection box; 12. Connection pipe; 13. Impeller; 14. Drive motor; 15. Alarm; 16. Handwheel; 17. Mounting plate; 18. Measuring column; 19. Support frame; 20. Detection wheel; 21. Spring; 22. Filter; 23. Fixed pipe; 24. Rotating seat; 25. Connecting rod one; 26. Connecting rod two; 27. Connecting block; 28. Gear; 29. ​​Rack; 30. Electric push rod; 31. Base block; 32. Limit rod; 33. Limit block; 34. Support hole; 35. Limit block; 36. Railing; 37. Screw; 38. Pressure sensor. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0020] Please refer to Figure 1 - Figure 5 ,in, Figure 1 It is a three-dimensional structural schematic diagram of the utility model; Figure 2 It is a schematic diagram of the installation structure of the air outlet pipe and the support box of the utility model; Figure 3 It is a bottom view schematic diagram of the connection structure of the fixed pipe and the connecting pipe of the utility model; Figure 4 for Figure 3 Schematic diagram of the local structure of A; Figure 5 A flatness detection device for asphalt pavement construction includes a base plate 1, a reference frame 2 is fixedly mounted on the top surface of the base plate 1, a support frame 3 is fixedly mounted on the top surface of the base plate 1, and the bottom surface of the base plate 1 is rotatably connected to a plurality of rollers 4 for assisting the movement of the base plate 1 through a suspension system;

[0021] The suspension system connects the bottom surface of the substrate 1 with the roller 4, and the suspension system is a prior art and will not be described in detail here;

[0022] The support frame 3 is internally slidably connected to a mounting plate 17, and a railing 36 for a person to hold is fixedly installed on the top surface of the base plate 1. The railing 36 is a U-shaped structure, which is used for a person to hold and push the base plate 1 to move on the asphalt pavement. The anti-detachment mechanism 5 is arranged on the top surface of the base plate 1 to prevent the roller 4 from detaching from the asphalt pavement.

[0023] The top surface of the base plate 1 is slidably connected with a measuring column 18, and the outer circumferential wall surface of the measuring column 18 is provided with a scale. The upper end of the measuring column 18 penetrates the reference frame 2 and extends to the outside of the reference frame 2. In the process of detecting the flatness of the asphalt pavement, the reference frame 2 is used as a reference standard. The flatness of the asphalt pavement can be detected by the up and down movement of the measuring column 18 and the corresponding scale.

[0024] A support frame 19 is fixedly installed on the bottom surface of the measuring column 18, and a detection wheel 20 is rotatably connected to the inside of the support frame 19 through a rotating shaft. A spring 21 is sleeved on the outer circumferential wall of the measuring column 18, and one end of the spring 21 is fixedly connected to the bottom surface of the substrate 1, and the other end of the spring 21 is fixedly connected to the top surface of the support frame 19. The spring 21 provides the force required for the detection wheel 20 to reset;

[0025] In the process of detecting the flatness of the asphalt pavement, the substrate 1 moves on the asphalt pavement to make the detection wheel 20 roll on the asphalt pavement. When the detection wheel 20 moves on the asphalt pavement and encounters concave and convex positions, the measuring column 18, the support frame 19 and the detection wheel 20 move up and down under the action of the spring 21, and the flatness of the asphalt pavement can be detected by using the reference frame 2 and the scale on the measuring column 18.

[0026] In the above manner, through the provided substrate 1, the staff pushes the substrate 1 to move on the asphalt pavement so that the detection wheel 20 rolls on the asphalt pavement. When the detection wheel 20 encounters a concave position, the force of the spring 21 causes the measuring column 18 to drive the support frame 19 and the detection wheel 20 to move downward. At the same time, when the detection wheel 20 encounters a convex position, the detection wheel 20 drives the support frame 19 and the measurement column 18 to move upward while compressing the spring 21. In this process, the reference frame 2 is used as the reference position, and the flatness of the asphalt pavement can be detected by the movement of the measuring column 18 and the scale thereon, thereby achieving the effect of detecting the flatness of the asphalt pavement.

[0027] The anti-separation mechanism 5 includes a support box 6, which is fixedly mounted on the top surface of the base plate 1. The support box 6 is a hollow rectangular structure and has an open bottom surface. The top surface of the base plate 1 is rotatably connected to an impeller 13 for suction. A driving motor 14 for driving the impeller 13 to rotate is installed on the top surface of the support box 6. The bottom surface of the driving shaft of the driving motor 14 penetrates the support box 6 and is fixedly connected to the top surface of the impeller 13. A connecting box 11 is fixedly mounted on the bottom surface of the base plate 1. A fixed pipe 23 is fixedly mounted on the bottom surface of the connecting box 11. The outer circular wall surface of the fixed pipe 23 is movably sleeved with a connecting pipe 12. The inner circular wall surface of the connecting pipe 12 is fixedly sleeved with a sealing ring for sealing, which is used to reduce the gap between the connecting pipe 12 and the fixed pipe 23. An air intake hopper 10 is fixedly mounted on the lower end of the connecting pipe 12. A filter screen 22 for blocking debris is fixedly sleeved inside the air intake hopper 10. The filter screen 22 can block the open mouth of the air intake hopper 10 to prevent debris from entering the interior of the connecting pipe 12 through the air intake hopper 10.

[0028] The impeller 13 is driven to rotate by the driving motor 14, and the impeller 13 rotates to inhale air, so that negative pressure is formed inside the air intake hopper 10. The negative pressure allows the air intake hopper 10 to adsorb the asphalt pavement, so that the multiple rollers 4 on the base plate 1 are closely attached to the asphalt pavement, and the rollers 4 are prevented from being separated from the asphalt pavement due to the force direction of the base plate 1 being not parallel to the asphalt pavement, and the support frame 19 is prevented from being moved unnecessarily due to the separation of the rollers 4 from the asphalt pavement, thereby improving the accuracy of the asphalt pavement flatness detection.

[0029] A rack 29 is slidably connected to the bottom surface of the base plate 1, an electric push rod 30 for driving the rack 29 to move is fixedly installed on the bottom surface of the base plate 1, one end of the telescopic shaft of the electric push rod 30 is fixedly connected to one side of the rack 29, a rotating seat 24 is fixedly installed on the bottom surface of the base plate 1, a connecting rod 1 25 is rotatably connected to the inside of the rotating seat 24 through a rotating shaft, and a connecting rod 2 26 is rotatably connected to the lower end of the connecting rod 1 25 through a rotating shaft, two connecting blocks 27 are fixedly installed on the top surface of the air intake scoop 10, and the lower end of the connecting rod 26 is rotatably connected to the two connecting blocks 27 through a rotating shaft, one side of the connecting rod 1 25 is coaxially connected to a gear 28 through a rotating shaft, and the rack 29 is meshingly connected to the gear 28;

[0030] The electric push rod 30 drives the rack 29 to move, the rack 29 moves to drive the gear 28 to rotate, the gear 28 rotates to drive the connecting rod 1 25 to rotate, the connecting rod 1 25 rotates to drive the connecting rod 2 26 to rotate, the connecting rod 1 25 and the connecting rod 2 26 rotate to move the air intake scoop 10 upward or downward, adjust the gap between the air intake scoop 10 and the asphalt pavement, and then adjust the adsorption force between the substrate 1 and the asphalt pavement;

[0031] An air outlet pipe 7 for air outlet is fixedly installed on one side of the support box 6, a support plate 8 is fixedly installed inside the air outlet pipe 7, a plurality of fans 9 for guiding air flow are rotatably connected to the top surface of the support plate 8, a PLC controller is fixedly installed on the top surface of the base plate 1, and the fans 9, the drive motor 14 and the electric push rod 30 are all electrically connected to the PLC controller;

[0032] The air sucked in by the impeller 13 is discharged through the outlet pipe 7, and the fan 9 inside the outlet pipe 7 rotates to guide the air. The airflow blows away the pebbles on the asphalt road surface through the outlet pipe 7 to prevent the pebbles from affecting the flatness detection of the asphalt road surface, thereby improving the detection effect and reasonably utilizing the air sucked in by the impeller 13.

[0033] In this method, through the set base plate 1, the staff holds the railing 36 on the base plate 1 to push the base plate 1 to move and make the roller 4 roll on the asphalt road surface. At this time, the detection wheel 20 will also roll on the asphalt road surface. The rolling of the detection wheel 20 allows the measuring column 18 to move up and down to detect the flatness of the asphalt road surface. In this process, the PLC controller starts the drive motor 14, and the drive shaft of the drive motor 14 rotates to drive the impeller 13 to rotate. The rotation of the impeller 13 causes the air on the bottom surface of the base plate 1 to enter the support box 6 through the air inlet hopper 10, the connecting box 11, the connecting pipe 12 and the fixing pipe 23. The inside of the air intake hopper 10 forms a negative pressure, and the negative pressure allows the air intake hopper 10 to adsorb the asphalt road surface, so that the roller 4 on the base plate 1 is closely attached to the asphalt road surface, preventing the roller 4 from being separated from the asphalt road surface due to the force direction of the personnel pushing the base plate 1 to move not being parallel to the asphalt road surface. The separation of the roller 4 from the asphalt road surface will cause the measuring column 18 and the detection wheel 20 to move inappropriately, which will cause errors, thereby avoiding errors in the results of detecting the flatness of the asphalt road surface due to the force direction of the personnel not being parallel to the asphalt road surface, and improving the accuracy of detecting the flatness of the asphalt road surface;

[0034] The air sucked into the support box 6 will enter the inside of the air outlet pipe 7, and the fan 9 on the support plate 8 inside the air outlet pipe 7 rotates so that the air is discharged from the front end of the air outlet pipe 7 and blown to the asphalt road surface in front, blowing away the pebbles on the asphalt road surface to prevent the pebbles from affecting the rolling of the detection wheel 20 on the asphalt road surface, further improving the accuracy of detecting the flatness of the asphalt road surface and making reasonable use of the air extracted by the impeller 13;

[0035] At the same time, the PLC controller starts the electric push rod 30, the telescopic shaft of the electric push rod 30 moves to drive the rack 29 to move, the rack 29 moves to drive the gear 28 to rotate, the gear 28 rotates to drive the connecting rod 1 25 to rotate, the connecting rod 1 25 rotates to drive the connecting rod 2 26 to rotate, the connecting rod 2 26 rotates to drive the air intake scoop 10 to move through the connecting block 27, the electric push rod 30 drives the rack 29 to move forward or backward to make the gear 28 rotate clockwise or counterclockwise, the gear 28 rotates clockwise or counterclockwise and then the cooperation of the connecting rod 1 25 and the connecting rod 2 26 allows the air intake scoop 10 to move upward or downward;

[0036] When the air intake scoop 10 moves downward, it will be closer to the asphalt road surface, thereby reducing the gap between it and the asphalt road surface. Due to the existence of negative pressure, the air intake scoop 10 will try to inhale more air to fill the reduced gap, which will increase the negative pressure inside the air intake scoop 10, or increase the pressure difference with the outside, thereby increasing the adsorption force on the asphalt road surface;

[0037] On the contrary, when the air intake scoop 10 moves upward, it will be away from the asphalt road surface, increasing the gap between it and the asphalt road surface, which will result in a decrease in the amount of air that the air intake scoop 10 needs to inhale, because the increase in the gap makes it easier for the air to flow, which will result in a decrease in the negative pressure inside the air intake scoop 10, or a decrease in the pressure difference with the outside, thereby reducing the adsorption force on the asphalt road surface;

[0038] Therefore, by adjusting the height of the air inlet hopper 10, the adsorption force of the base plate 1 on the asphalt pavement can be adjusted accordingly. The downward movement of the air inlet hopper 10 will increase the adsorption force, while the upward movement will reduce the adsorption force, so that the staff can adjust the gap between the air inlet hopper 10 and the asphalt pavement according to the asphalt pavement conditions, so that the roller 4 will not separate from the asphalt pavement when the staff pushes the base plate 1 to move on the asphalt pavement, and the erroneous movement of the measuring column 18 is reduced, so as to achieve the effect of preventing the roller 4 and the asphalt pavement from separating, which is helpful for the staff to detect the flatness of the asphalt pavement;

[0039] Two base blocks 31 are fixedly installed on the bottom surface of the base plate 1, and a limiting rod 32 is fixedly installed between the two base blocks 31. A limiting block 33 is fixedly installed on one side of the rack 29. The limiting block 33 is slidably connected with the limiting rod 32. The movement of the rack 29 causes the limiting block 33 to move along the limiting rod 32. The limiting rod 32 and the limiting block 33 cooperate to limit the movement of the rack 29.

[0040] In this embodiment, the rack 29 is provided, and the movement of the rack 29 drives the limit block 33 to move upward along the limit rod 32 between the two base blocks 31. The two base blocks 31 can support the limit rod 32. The limit rod 32 and the limit block 33 cooperate to limit the movement of the rack 29, thereby preventing the rack 29 from being separated from the gear 28.

[0041] The support frame 3 is internally rotatably connected with a screw rod 37, the lower end of the screw rod 37 is rotatably connected with the inner bottom surface of the support frame 3 through a bearing, the upper end of the screw rod 37 penetrates the support frame 3 and is fixedly installed with a hand wheel 16, and the screw rod 37 can be driven to rotate by rotating the hand wheel 16, the mounting plate 17 is threadedly connected with the screw rod 37, the bottom surface of the mounting plate 17 is fixedly installed with a pressure sensor 38, and the top surface of the base plate 1 is fixedly installed with an alarm 15 for alarm, and the alarm 15 and the pressure sensor 38 are both electrically connected to the PLC controller;

[0042] The screw rod 37 is driven to rotate by rotating the hand wheel 16, and the screw rod 37 rotates so that the mounting plate 17 and the pressure sensor 38 move to the appropriate position on the top surface of the measuring column 18. At this time, the height between the top surface of the measuring column 18 and the bottom surface of the mounting plate 17 is the maximum threshold height that the asphalt road surface bulge can accept. When the measuring column 18 moves beyond this height, it will contact the pressure sensor 38. After the pressure sensor 38 senses the pressure, the alarm 15 will be activated to alert the staff that this needs to be dealt with in detail, which is highly targeted.

[0043] In this method, through the hand wheel 16, the staff rotates the hand wheel 16 to drive the screw rod 37 to rotate, and the screw rod 37 rotates so that the mounting plate 17 drives the pressure sensor 38 to move along the screw rod 37. The staff sets the height between the top surface of the measuring column 18 and the bottom surface of the mounting plate 17 as the maximum threshold height acceptable for the asphalt pavement protrusion. The staff moves the mounting plate 17 and the pressure sensor 38 to a suitable position above the measuring column 18. The detection wheel 20 will encounter the protrusion during the process of detecting the flatness of the asphalt pavement. When the detection wheel 20 encounters the protrusion, it will drive the measuring column 18 to move upward. If the height of this protrusion is greater than the maximum threshold height, the measuring column 18 will contact the pressure sensor 38 on the bottom surface of the mounting plate 17. After the pressure sensor 38 is under pressure, it will transmit a signal to the PLC controller. After receiving the signal, the PLC controller will activate the alarm 15 to sound an alarm, thereby reminding the staff that this position needs to be focused on.

[0044] Support holes 34 are provided on both sides of the support frame 3, and limiting blocks 35 are fixedly installed on both sides of the mounting plate 17. The limiting blocks 35 are slidably connected to the support holes 34. The support holes 34 and the limiting blocks 35 cooperate to limit the movement of the mounting plate 17.

[0045] In this method, by setting up the mounting plate 17, the movement of the mounting plate 17 will drive the limiting block 35 to move inside the supporting hole 34. The supporting hole 34 and the limiting block 35 can cooperate to limit the movement of the mounting plate 17, thereby achieving a limiting effect on the mounting plate 17.

[0046] The working principle of a flatness detection device for asphalt pavement construction provided by the utility model is as follows:

[0047] By setting the base plate 1, in the process of detecting the flatness of the asphalt road surface, the base plate 1 moves on the asphalt road surface so that the detection wheel 20 rolls on the asphalt road surface. When the detection wheel 20 moves on the asphalt road surface and encounters concave and convex positions, the measuring column 18, the support frame 19 and the detection wheel 20 move up and down under the action of the spring 21, and the flatness of the asphalt road surface can be detected by the reference frame 2 and the scale on the measuring column 18;

[0048] Next, the impeller 13 is driven to rotate by the driving motor 14. The impeller 13 rotates to inhale air, so that negative pressure is formed inside the air intake hopper 10. The negative pressure allows the air intake hopper 10 to adsorb the asphalt pavement, so that the multiple rollers 4 on the base plate 1 are closely attached to the asphalt pavement, and the rollers 4 are prevented from being separated from the asphalt pavement due to the force direction of the personnel pushing the base plate 1 to move being not parallel to the asphalt pavement, and the support frame 19 is prevented from being moved unnecessarily due to the separation of the rollers 4 from the asphalt pavement, thereby improving the accuracy of the asphalt pavement flatness detection.

[0049] Secondly, the electric push rod 30 drives the rack 29 to move, the rack 29 moves to drive the gear 28 to rotate, the gear 28 rotates to drive the connecting rod 1 25 to rotate, the connecting rod 1 25 rotates to drive the connecting rod 2 26 to rotate, the connecting rod 1 25 and the connecting rod 2 26 rotate to move the air intake scoop 10 upward or downward, adjust the gap between the air intake scoop 10 and the asphalt road surface, and then adjust the adsorption force between the substrate 1 and the asphalt road surface;

[0050] At the same time, the air sucked in by the impeller 13 rotates and is discharged through the air outlet pipe 7. The fan 9 inside the air outlet pipe 7 rotates to guide the air. The airflow blows away the pebbles on the asphalt road surface through the air outlet pipe 7 to prevent the pebbles from affecting the flatness detection of the asphalt road surface. The air sucked in by the impeller 13 is reasonably used while improving the detection effect.

[0051] Finally, by turning the hand wheel 16 to drive the screw rod 37 to rotate, the screw rod 37 rotates so that the mounting plate 17 and the pressure sensor 38 move to the appropriate position on the top surface of the measuring column 18. At this time, the height between the top surface of the measuring column 18 and the bottom surface of the mounting plate 17 is the maximum threshold height that the asphalt pavement bump can accept. When the measuring column 18 moves beyond this height, it will contact the pressure sensor 38. After the pressure sensor 38 senses the pressure, it will activate the alarm 15 to alert the staff that this needs to be dealt with in a targeted manner.

[0052] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A flatness detection device for asphalt pavement construction, characterized in that: include: A base plate (1), a reference frame (2) being fixedly mounted on the top surface of the base plate (1), a support frame (3) being fixedly mounted on the top surface of the base plate (1), a bottom surface of the base plate (1) being rotatably connected to a plurality of rollers (4) for assisting the movement of the base plate (1) via a suspension system, a mounting plate (17) being slidably connected inside the support frame (3), and a handrail (36) for a person to hold onto being fixedly mounted on the top surface of the base plate (1); an anti-separation mechanism (5), the anti-separation mechanism (5) being arranged on the top surface of the base plate (1) and being used to prevent the roller (4) from separating from the asphalt pavement; The top surface of the substrate (1) is slidably connected to a measuring column (18), the bottom surface of the measuring column (18) is fixedly mounted with a support frame (19), the interior of the support frame (19) is rotatably connected to a detection wheel (20), the outer circumferential wall surface of the measuring column (18) is sleeved with a spring (21), one end of the spring (21) is fixedly connected to the bottom surface of the substrate (1), and the other end of the spring (21) is fixedly connected to the top surface of the support frame (19), the upper end of the measuring column (18) passes through the reference frame (2) and extends to the outside of the reference frame (2), and the anti-separation mechanism (5) comprises a support box (6), the support box (6) is fixedly mounted on the top surface of the base plate (1), the top surface of the base plate (1) is rotatably connected to an impeller (13) for suction, the top surface of the support box (6) is mounted with a drive motor (14) for driving the impeller (13) to rotate, the bottom surface of the drive shaft of the drive motor (14) passes through the support box (6) and is fixedly connected to the top surface of the impeller (13), the bottom surface of the base plate (1) is fixedly mounted with a connection box (11), the bottom surface of the connection box (11) is fixedly mounted with a fixed tube (23), and the outer circumferential wall surface of the fixed tube (23) is movably sleeved with a connection tube (12), an air intake hopper (10) is fixedly mounted on the lower end of the connecting pipe (12), a filter screen (22) for blocking debris is fixedly sleeved inside the air intake hopper (10), a rack (29) is slidably connected to the bottom surface of the base plate (1), an electric push rod (30) for driving the rack (29) to move is fixedly mounted on the bottom surface of the base plate (1), one end of the telescopic shaft of the electric push rod (30) is fixedly connected to one side of the rack (29), a rotating seat (24) is fixedly mounted on the bottom surface of the base plate (1), a connecting rod (25) is rotatably connected to the inside of the rotating seat (24), and the connecting rod The lower end of the first (25) is rotatably connected to the second connecting rod (26), the top surface of the air intake scoop (10) is fixedly mounted with two connecting blocks (27), the lower end of the second connecting rod (26) is rotatably connected to the two connecting blocks (27), one side of the first connecting rod (25) is coaxially connected to a gear (28), the rack (29) is meshingly connected to the gear (28), one side of the support box (6) is fixedly mounted with an air outlet pipe (7) for exhausting air, the interior of the air outlet pipe (7) is fixedly mounted with a support plate (8), and the top surface of the support plate (8) is rotatably connected to a plurality of fans (9) for guiding airflow.

2. A flatness detection device for asphalt pavement construction according to claim 1, characterized in that: Two base blocks (31) are fixedly mounted on the bottom surface of the base plate (1), a limiting rod (32) is fixedly mounted between the two base blocks (31), a limiting block (33) is fixedly mounted on one side of the rack (29), and the limiting block (33) is slidably connected to the limiting rod (32).

3. A flatness detection device for asphalt pavement construction according to claim 2, characterized in that: A screw rod (37) is rotatably connected inside the support frame (3); the lower end of the screw rod (37) is rotatably connected to the inner bottom surface of the support frame (3); the upper end of the screw rod (37) passes through the support frame (3) and is fixedly mounted with a hand wheel (16); the mounting plate (17) is threadedly connected to the screw rod (37); a pressure sensor (38) is fixedly mounted on the bottom surface of the mounting plate (17); and an alarm (15) for alarming is fixedly mounted on the top surface of the base plate (1).

4. A flatness detection device for asphalt pavement construction according to claim 1, characterized in that: Support holes (34) are provided on both sides of the support frame (3), and limiting blocks (35) are fixedly mounted on both sides of the mounting plate (17), wherein the limiting blocks (35) are slidably connected to the support holes (34).

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