Pavement milling leveling device based on milling depth real-time feedback and construction method thereof

Abstract

The application relates to a road milling leveling device based on milling depth real-time feedback and a construction method thereof, which comprises a vehicle frame, a guide frame, a bearing beam in sliding connection with the vehicle frame, a sliding frame in fixed connection with the bearing beam and in sliding connection with the guide frame and a milling drum detachably mounted on the sliding frame; the milling drum can slide relative to the vehicle frame, can switch working states when encountering a road bump convex position, can control the milling drum to move, can increase the milling time of the road bump convex position, can gradually mill and level the road bump convex position by controlling the depth of cut, can avoid local uneven cutting of the milling drum when the milling drum encounters the road bump convex position, can effectively increase the service life of the cutter of the milling drum, and can make the area after road milling more flat.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road milling, in particular to a road milling leveling device based on real-time feedback of milling depth and a construction method thereof. BACKGROUND

[0002] In highway maintenance and reconstruction projects, road milling operation is the core process to achieve road disease repair and flatness improvement, and its construction quality directly determines the stability of the subsequent paving layer and the safety of road traffic. With the long-term effect of traffic load, repeated erosion of environmental factors and accumulation of initial construction defects, typical diseases such as bulging, local protrusion and uneven settlement are prone to occur on asphalt or cement pavement. These diseases not only affect driving comfort, but also may cause traffic safety hazards due to vehicle bumping. Therefore, accurate milling and leveling treatment of the disease road becomes a key link in maintenance engineering.

[0003] The current mainstream road milling equipment usually adopts a fixed milling drum structure, and the relative position of the milling drum and the frame remains constant. During operation, the operation control mainly relies on the preset milling depth parameters or the experience judgment of the operator. However, when such equipment faces complex and variable road diseases, it exposes significant technical defects. When the milling drum travels to the bulging or protruding part of the road, the local cutting depth will suddenly increase due to the inability of the milling drum position to be adjusted in time, resulting in a violent impact between the cutter and the protruding part. This impact not only causes local excessive wear of the milling drum cutter, but also causes faults such as cutter cracking and cutter seat deformation, significantly shortening the service life of the cutter, increasing the equipment maintenance cost and the frequency of operation interruption.

[0004] More prominently, the fixed milling drum structure is difficult to achieve gradient milling and leveling of the protruding part. When encountering the protruding area, the equipment can only mill once at a fixed depth, which is prone to under-milling or over-milling. If the cutting depth is insufficient, the protruding part will not be completely removed, and the road will still have flatness defects after milling. If the cutting depth is blindly increased to eliminate the protrusion, the road in the non-protruding area will be over-milled, causing material waste and reducing milling efficiency. At the same time, uneven local cutting will also cause the milled road to form small waves or height differences, which requires additional manpower and resources for secondary leveling in subsequent paving operations, not only prolonging the construction period, but also reducing the stability of the overall engineering quality. SUMMARY

[0005] In order to solve the above problems existing in the prior art, the present application aims to provide a road milling leveling device based on real-time feedback of milling depth and a construction method thereof.

[0006] The technical solution adopted by the present application is:

[0007] The application discloses a road milling leveling device based on milling depth real-time feedback and a construction method thereof.

[0008] One side of the milling drum is provided with a gravel conveying mechanism, the gravel conveying mechanism comprises a bottom plate, baffle plates fixedly arranged on both sides of the bottom plate, and a connecting rod with one end fixedly connected with the baffle plates and the other end movably arranged on the vehicle frame, the bottom plate contacts a road construction surface, and the working state of the milling drum is adjusted according to the floating state of the bottom plate.

[0009] As a preferred embodiment of the application, a conveying belt is arranged between the baffle plates on both sides, one side of the baffle plate is provided with a conveying motor, the conveying motor is used for driving the conveying belt, the surface of the conveying belt is provided with protruding ribs, and the conveying belt is used for conveying the gravel generated by the milling drum.

[0010] As a preferred embodiment of the application, a screw rod is rotatably arranged on the vehicle frame, a control motor is fixedly arranged on one end of the vehicle frame away from the gravel conveying mechanism, the control motor is used for driving the screw rod, a sliding beam is slidably arranged on one side of the vehicle frame, the sliding beam is matched with the screw rod, a striking pad is fixedly arranged on one side of the sliding beam away from the control motor, the screw rod penetrates through the striking pad, and the sliding beam is used for controlling the resetting of the milling drum.

[0011] As a preferred embodiment of the application, one side of the bearing beam is provided with a moving beam, the bearing beam and the moving beam are provided with control cylinders at the end portions, the bearing beam and the moving beam are fixedly connected with the cylinder barrels and the piston rods of the control cylinders respectively, a moving sleeve is fixedly arranged at the middle position of the moving beam, the screw rod penetrates through the moving sleeve, the moving sleeve is matched with the striking pad, and the moving beam is slidably connected with the vehicle frame.

[0012] As a preferred embodiment of the application, the middle point position of the sliding frame is raised to the side where the vehicle frame is located in an inverted V shape, the bearing beam is located on the side of the sliding frame away from the vehicle frame, the sliding frame is located between the moving beam and the bearing beam, and the two end portions of the sliding frame are hollow structures and are penetrated through by the guide frame.

[0013] As the preferred of the present application, the slide frame and the guide frame are respectively provided with two, the two slide frames are provided with a placement plate, the two ends of the placement plate are respectively fixedly connected with the two slide frames, the two guide frames are provided with a connecting beam, the two ends of the connecting beam are respectively fixedly connected with the two guide frames, the end of the connecting beam is provided with a sliding rod, the sliding rod includes two parts which are slidably connected with each other and are respectively fixedly connected with the connecting beam and the frame.

[0014] As the preferred of the present application, one side of the slide frame is fixedly provided with a fixed rod, one end of the fixed rod away from the slide frame is fixedly provided with a protective cover, the milling drum is located in the protective cover, the end of the milling drum is rotatably connected with the side wall of the protective cover, one side of the protective cover is fixedly provided with a driving motor, the driving motor is used to drive the milling drum to rotate.

[0015] As the preferred of the present application, the side of the slide frame is fixedly provided with a plurality of connecting plates, one end of the connecting plate is provided with an adjusting cylinder, the cylinder barrel of the adjusting cylinder is fixedly connected with the connecting plate, the sensor is fixedly arranged on the piston rod of the adjusting cylinder, the sensor is used to detect and feedback the distance between the bottom plate and the milling drum and the bottom surface respectively.

[0016] As the preferred of the present application, the two sides of the frame are respectively fixedly provided with two cross beams, one side of the placement plate is fixedly provided with a fixed plate, the fixed plate is fixedly provided with a control plate, one end of the guide frame is slidably provided with a locking plate, the locking plate and the control plate are provided with a telescopic rod, the telescopic rod includes two parts which are slidably connected with each other and are respectively fixedly connected with the control plate and the locking plate, the control spring is arranged on the side of the telescopic rod, the two ends of the control spring are respectively fixedly connected with the control plate and the locking plate, one end of the locking plate is formed into a wedge-shaped part, the wedge-shaped part cooperates with one of the cross beams and keeps the two connected, the control plate cooperates with the other cross beam and limits the sliding range of the milling drum.

[0017] The pavement milling leveling construction method based on the real-time feedback of milling depth comprises the following steps:

[0018] S1, floating monitoring; the abnormal protrusion condition of the road construction surface is reflected in real time according to the floating condition of the bottom plate, when the bottom plate is instantaneously lifted, the construction area in front of the milling drum is marked as a leveling area;

[0019] S2, switching state; when the milling drum passes through the leveling area, the lifting of the milling drum is switched to the leveling state, after the milling drum is separated from the frame, the frame advances at a constant speed according to the set speed, and the milling drum stays in the leveling area for local milling;

[0020] S3, milling and leveling; during the in-situ milling process of the milling drum, the milling drum is controlled to slowly descend, the depth of cut is controlled to be always in a proper range, the milling time of the area to be leveled is increased, and the milling depth after milling is consistent with that of other construction areas;

[0021] S4, reset milling; after the milling of the area to be leveled is completed, the milling drum is controlled to accelerate forward relative to the frame and to mill, until the milling drum is reset, and then the milling continues in a normal state.

[0022] The present application has the following beneficial effects: as a road milling leveling device and construction method based on real-time feedback of milling depth, the milling drum can slide relative to the frame, the working state can be switched when the milling drum encounters a road bump, the milling drum is controlled to move, the milling time of the road bump is increased, the road bump is gradually leveled by controlling the depth of cut, local uneven cutting of the milling drum when encountering the road bump is avoided, the service life of the cutter of the milling drum can be effectively increased, and the area after road milling is more level. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described in detail below in combination with the drawings and specific implementation methods.

[0024] Figure 1 is an explosive structure schematic diagram of the present application;

[0025] Figure 2 is an installed structure schematic diagram of the present application; Figure 1

[0026] Figure 3 is a top view structure schematic diagram of the present application; Figure 2

[0027] Figure 4 is a B-B direction structure schematic diagram of the present application; Figure 3

[0028] Figure 5 is a sliding frame structure schematic diagram of the present application; Figure 1

[0029] Figure 6 is a locking plate structure schematic diagram of the present application; Figure 1

[0030] Figure 7 is an enlarged structure schematic diagram of A of the present application. Figure 2 DETAILED DESCRIPTION

[0031] ​​​​​​In order to further illustrate the technical means adopted by the present application to achieve the predetermined object and the effects, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0032] In combination Figures 1-7 The milling depth real-time feedback based road milling leveling device comprises a vehicle frame 11, a guide frame 37, a load-bearing beam 20 in sliding connection with the vehicle frame 11, a sliding frame 36 in fixed connection with the load-bearing beam 20 and in sliding connection with the guide frame 37, and a milling drum 31 detachably mounted on the sliding frame 36. The milling drum 31 can slide relative to the vehicle frame 11. When the milling drum 31 encounters a road bump, the milling drum 31 can be controlled to move, thereby increasing the milling time for the road bump. By controlling the depth of cut, the road bump can be gradually milled and leveled, and the milling drum 31 can avoid uneven cutting when encountering the road bump. The service life of the cutter 32 of the milling drum 31 can be effectively increased, and the area after road milling can be more leveled.

[0033] One side of the milling drum 31 is provided with a gravel conveying mechanism. The gravel conveying mechanism comprises a bottom plate 26, baffle plates 24 fixedly arranged on both sides of the bottom plate 26, and a connecting rod 23 having one end fixedly connected with the baffle plates 24 and the other end movably mounted on the vehicle frame 11. The bottom plate 26 contacts the road construction surface, and the working state of the milling drum 31 is adjusted according to the floating state of the bottom plate 26. The bottom plate 26 contacts the road surface but does not press the road surface. During the driving of the engineering vehicle, the bottom plate 26 is not easily worn, and the bottom plate 26 can be detached and replaced, thereby facilitating replacement after excessive wear. The bottom plate 26 is forced to float when encountering a road bump. According to the detected result, the milling drum 31 is actively switched.

[0034] Beneficially, a conveying belt 21 is arranged between the baffle plates 24 on both sides. One side of the baffle plate 24 is provided with a conveying motor 25. The conveying motor 25 is used to drive the conveying belt 21. The surface of the conveying belt 21 is provided with protruding ribs. The conveying belt 21 is used to convey the gravel generated by the milling drum 31. The end of the connecting rod 23 away from the baffle plate 24 is fixedly provided with a mounting plate 22. The mounting plate 22 is provided with a movable groove 46. A fixed pin 47 is fixedly arranged on the vehicle frame 11. The fixed pin 47 cooperates with the movable groove 46. The conveying belt 21 has multiple sections, and the multiple sections of the conveying belt 21 have overlapping gaps. The conveying belt 21 extends to the frontmost position of the engineering vehicle. Only a part of the conveying belt 21 is shown in the drawing. This part of the conveying belt 21 is allowed to float relative to the engineering vehicle and the remaining conveying belt 21.

[0035] Beneficially, the frame 11 is provided with a screw rod 13, and a control motor 16 is fixedly arranged at one end of the frame 11 away from the gravel conveying mechanism, the control motor 16 is used to drive the screw rod 13, a sliding beam 15 is slidably arranged at one side of the frame 11, the sliding beam 15 cooperates with the screw rod 13, and a striking pad 14 is fixedly arranged at one side of the sliding beam 15 away from the control motor 16, the screw rod 13 penetrates through the striking pad 14, and the sliding beam 15 is used to control the resetting of the milling drum 31. The striking pad 14 is provided with a circular hole at a middle position, and the screw rod 13 does not contact the striking pad 14, the striking pad 14 is used for buffering, the milling drum 31 is pushed to move relative to the frame 11 to realize resetting by driving the sliding beam 15 and the striking pad 14, and in the milling operation, the milling drum 31 is allowed to accelerate or decelerate for a short time, and the moving speed of the milling drum 31 relative to the road surface is within a proper range.

[0036] Beneficially, the load-bearing beam 20 is provided with a moving beam 19, and the load-bearing beam 20 and the moving beam 19 are provided with control cylinders 18 at the ends, the load-bearing beam 20 and the moving beam 19 are fixedly connected with the cylinder barrels and piston rods of the control cylinders 18 respectively, a moving sleeve 17 is fixedly arranged at a middle position of the moving beam 19, the screw rod 13 penetrates through the moving sleeve 17, but the screw rod 13 does not contact the moving sleeve 17, the moving sleeve 17 cooperates with the striking pad 14, and the moving beam 19 is slidably connected with the frame 11. The control cylinder 18 controls the lifting of the milling drum 31 to be the unlocking step, after unlocking, since the milling drum 31 is not completely separated from the ground, the cutter 32 of the milling drum 31 contacts at least the raised position of the road surface, so that the milling drum 31 does not advance with the frame 11, thereby realizing that the milling drum 31 mills on the spot after the switching state, and gradually mills the raised position of the road surface.

[0037] Beneficially, the sliding frame 36 is raised in an inverted V shape to the side where the frame 11 is located at a middle position, the load-bearing beam 20 is located at one side of the sliding frame 36 away from the frame 11, the sliding frame 36 is located between the moving beam 19 and the load-bearing beam 20, and both ends of the sliding frame 36 are hollow structures and are penetrated through by the guide frame 37. The special shape of the sliding frame 36 ensures that the sliding frame 36 is not deformed and interfered when the milling drum 31 is lifted, and is beneficial to the sliding of the sliding frame 36 relative to the guide frame 37, and does not cause the jamming phenomenon due to long-time use.

[0038] Beneficially, two sliding frames 36 are respectively provided, a placement plate 45 is arranged between the two sliding frames 36, two ends of the placement plate 45 are respectively fixedly connected with the two sliding frames 36, a connecting beam 44 is arranged between two guide frames 37, two ends of the connecting beam 44 are respectively fixedly connected with the two guide frames 37, an end of the connecting beam 44 is provided with a sliding rod 38, the sliding rod 38 includes two parts which are slidably connected with each other and are respectively fixedly connected with the connecting beam 44 and the frame 11. When the milling drum 31 is lifted, the guide frame 37 is lifted together, the part where the bottom plate 26 is located is also lifted, but since the bottom plate 26 has passed the road surface convex position, the fixed pin 47 still contacts the top end of the movable groove 46.

[0039] Beneficially, a fixed rod 29 is fixedly arranged on one side of the sliding frame 36, a protective cover 28 is fixedly arranged on an end of the fixed rod 29 away from the sliding frame 36, the milling drum 31 is located in the protective cover 28, an end of the milling drum 31 is rotatably connected with a side wall of the protective cover 28, a drive motor 30 is fixedly arranged on one side of the protective cover 28, and the drive motor 30 is used to drive the milling drum 31 to rotate. In addition to protection, the protective cover 28 is also used to guide the flow direction of the crushed stones generated by milling.

[0040] Beneficially, a plurality of connecting plates 33 are fixedly arranged on the side surface of the sliding frame 36, an adjusting cylinder 35 is arranged on one end of the connecting plate 33, a cylinder barrel of the adjusting cylinder 35 is fixedly connected with the connecting plate 33, a sensor 34 is fixedly arranged on a piston rod of the adjusting cylinder 35, and the sensor 34 is used to detect and feed back the distance between the bottom plate 26 and the milling drum 31 and the bottom surface respectively. The sensor 34 is a multifunctional integrated sensor, which can detect and feed back a plurality of parameters in the road milling process, including the moving speed of the device, the depth before and after milling, the floating distance of the bottom plate 26 and the lifting distance of the milling drum 31.

[0041] Beneficially, two beams 12 are fixedly arranged on two sides of the frame 11 respectively, one side of the placing plate 45 is fixedly provided with a fixed plate 43, the fixed plate 43 is fixedly provided with a control plate 27, one end of the guide frame 37 is slidably provided with a locking plate 39, the locking plate 39 and the control plate 27 are provided with a telescopic rod 41, the telescopic rod 41 comprises two parts which are slidably connected with each other and are fixedly connected with the control plate 27 and the locking plate 39 respectively, the telescopic rod 41 is provided with a control spring 42 on the circumferential side, the control spring 42 is fixedly connected with the control plate 27 and the locking plate 39 at two ends respectively, one end of the locking plate 39 forms a wedge-shaped part 40, the wedge-shaped part 40 cooperates with one of the beams 12 and keeps the two in a connected state, the control plate 27 cooperates with the other beam 12 and limits the sliding range of the milling drum 31. The two beams 12 are respectively a front end beam 12 at one end of the head of the engineering vehicle and a rear end beam at the tail end of the engineering vehicle, and the two beams 12 are respectively used for locking the milling drum 31 and limiting the maximum sliding distance of the milling drum 31.

[0042] The road milling leveling construction method based on real-time feedback of milling depth comprises the following steps:

[0043] S1, floating monitoring; the abnormal protrusion condition of the road construction surface is reflected in real time according to the floating condition of the bottom plate 26, and when the instantaneous lifting of the bottom plate 26 is detected, the construction area in front of the milling drum 31 is marked as a leveling area;

[0044] S2, switching state; when the milling drum 31 passes through the leveling area, the milling drum 31 is switched to a leveling state, after the milling drum 31 is separated from the frame 11, the frame 11 advances at a set speed, and the milling drum 31 stays in the leveling area for milling;

[0045] S3, milling leveling; during the in-situ milling of the milling drum 31, the milling drum 31 is controlled to slowly descend, the depth of cut is controlled to be always within a suitable range, the milling time of the leveling area is increased, and the milling depth after milling is consistent with that of other construction areas;

[0046] S4, reset milling; after the milling of the leveling area is completed, the milling drum 31 is controlled to accelerate relative to the frame 11 and to mill, and after the milling drum 31 is reset, the milling continues in a normal state.

[0047] The working principle of the application is as follows:

[0048] In the initial state, the frame 11 is fixedly connected with the engineering vehicle chassis, the engineering vehicle drives along the area to be milled, the front of the engineering vehicle is equipped with a gravel collection vehicle, the gravel generated by milling is lifted to a certain height by the conveyor belt 21, and is thrown into the gravel collection vehicle from the front of the engineering vehicle; the impact pad 14 stays behind the transverse beam 12 at the rear end of the frame 11.

[0049] In the normal state, the engineering vehicle advances at a set speed, the frame 11, the gravel conveying mechanism and the milling drum 31 follow the engineering vehicle to advance at a uniform speed, the driving motor 30 controls the milling drum 31 to continuously rotate, the area contacted by the cutter 32 is milled, the gravel generated by milling is pushed to the gravel conveying mechanism, and the gravel enters the upper side of the bottom plate 26 as the engineering vehicle advances, the conveying motor 25 controls the conveyor belt 21 to rotate, and the conveyor belt 21 gradually lifts the gravel contacted.

[0050] When the bottom plate 26 encounters an abnormally protruding road construction surface, the bottom plate 26 is lifted by the protrusion, and immediately resets after the bottom plate 26 passes the protrusion, during which the bottom of the gravel conveying mechanism is lifted, the movable slot 46 is lifted relative to the fixed pin 47, and the sensor 34 detects the abnormal floating of the bottom plate 26, and immediately controls the milling drum 31 to switch to the leveling state.

[0051] In the leveling state, the control cylinder 18 is started, the control piston rod thereof is controlled to retract, the load-bearing beam 20 is lifted, the sliding frame 36 and the guide frame 37 follow the load-bearing beam 20 to be lifted, the setting plate 45, the control plate 27 and the locking plate 39 follow the sliding frame 36 to be lifted, the milling drum 31 and the protective cover 28 follow the sliding frame 36 to be lifted, the milling depth of the milling drum 31 becomes shallow, the milling drum 31 does not completely separate from the road surface, the cutter 32 at least contacts the protruding part, and the wedge-shaped part 40 only needs to be slightly lifted to separate from the front transverse beam 12 in this process, the control plate 27 and the locking plate 39 no longer keep still with the transverse beam 12, and the frame 11 continues to move forward with the engineering vehicle, since the milling drum 31 still contacts the ground, the milling drum 31 and the sliding frame 36 have a tendency to keep still, and the milling drum 31 still keeps a rotating state of continuous work;

[0052] In the process of the milling drum 31 working in place, since the cutter 32 only contacts the protruding part of the ground, the milling drum 31 does not roll back when the milling depth is shallow, and only has a tendency to roll back when the milling depth gradually increases; before the milling drum 31 rolls back, the protruding part has been milled to be qualified, when the milling drum 31 rolls back, the frame 11 has advanced a sufficient distance with the engineering vehicle, the rear-end transverse beam 12 contacts the control plate 27 to limit the milling drum 31 from rolling back, and at this time, the milling drum 31 is forced to move forward with the frame 11 at the original speed and at a uniform speed.

[0053] Subsequently switch to normal state milling, in the switching process, the control motor 16 start, control screw 13 rotation, under the action of screw makes the sliding beam 15 along the frame 11 sliding, impact pad 14 with sliding beam 15 together with the sliding, impact pad 14 hit to the mobile sleeve 17 after the impact pad 14 with the mobile sleeve 17 together with the mobile beam 19, 20, sliding frame 36, milling drum 31 and control plate 27 are followed by the mobile sleeve 17 together with the movement, to the wedge-shaped part 40 contact front cross beam 12, control spring 42 is stretched, locking plate 39 is forced to slide, when the wedge-shaped part 40 completely through the front cross beam 12, the wedge-shaped part 40 reset under the action of control spring 42, at this time the locking plate 39 and control plate 27 with frame 11 keep relative static, milling drum 31 continue to follow the frame 11 together with the forward uniform speed and on the road milling; Finally 16 control sliding beam 15 and impact pad 14 reset. In the process of the frame 11 advance speed is always the same, milling drum 31 allows a certain range of accelerated forward, and does not affect the normal milling operation.

[0054] The above description is only the preferred embodiment of the present application, not any form of the present application, although the present application has been disclosed as above, however, not to limit the present application, any person skilled in the art, without departing from the scope of the present application, when the above-mentioned disclosed technical content to make some more changes or modifications of equivalent examples, but whatever is not out of the present application technical solution content, according to the technical essence of the present application above the examples of any brief introduction modification, equivalent changes and modifications, still belong to the scope of the present application technical solution.

Claims

1. A pavement milling and planing device based on real-time feedback of the milling depth, characterized in that: The milling drum is detachably mounted on the sliding frame, and the milling drum is provided with a side of the gravel conveying mechanism, the gravel conveying mechanism comprises a bottom plate, a fixedly arranged on both sides of the bottom plate baffle and one end with the baffle fixed connection and the other end of the movable installation on the frame connecting rod, the bottom plate contact road construction surface, according to the floating condition of the bottom plate adjusts the working condition of the milling drum. The sliding frame and the guide frame are respectively provided with two, two sliding frames are provided with a setting plate, the both ends of the setting plate are respectively fixedly connected with two sliding frames, two guide frames are provided with a connecting beam, the both ends of the connecting beam are respectively fixedly connected with two guide frames, the end of the connecting beam is provided with a sliding rod, the sliding rod comprises two parts which are slidably connected with each other, and are respectively fixedly connected with the connecting beam and the frame. The side of the sliding frame is fixedly provided with a plurality of connecting plates, one end of the connecting plate is provided with an adjusting cylinder, the cylinder barrel of the adjusting cylinder is fixedly connected with the connecting plate, the piston rod of the adjusting cylinder is fixedly provided with a sensor, the sensor is used for detecting and feeding back the distance between the bottom plate and the milling drum respectively relative to the bottom surface. The both sides of the frame are respectively fixedly provided with two cross beams, one side of the setting plate is fixedly provided with a fixed plate, the fixed plate is fixedly provided with a control plate, one end of the guide frame is slidably provided with a locking plate, the locking plate and the control plate are provided with a telescopic rod, the telescopic rod comprises two parts which are slidably connected with each other, and are respectively fixedly connected with the control plate and the locking plate, the control spring is provided on the periphery of the telescopic rod, the both ends of the control spring are respectively fixedly connected with the control plate and the locking plate, one end of the locking plate forms a wedge-shaped part, the wedge-shaped part cooperates with one of the cross beams and keeps the connection state, the control plate cooperates with the other cross beam and limits the sliding range of the milling drum. The both sides of the baffle are provided with a conveying belt, one side of the baffle is provided with a conveying motor, the conveying motor is used for driving the conveying belt, the surface of the conveying belt is provided with a protruding rib, the conveying belt is used for conveying the gravel generated by the milling drum; one end of the connecting rod away from the baffle is fixedly provided with a mounting plate, the mounting plate is provided with a movable groove, the frame is fixedly provided with a fixed pin, the fixed pin and the movable groove are matched.

2. A milling depth based real-time feedback pavement milling grading device according to claim 1, characterized in that: The frame is rotatably provided with a lead screw, the frame is fixedly provided with a control motor away from the gravel conveying mechanism, the control motor is used for driving the lead screw, one side of the frame is slidably provided with a sliding beam, the sliding beam cooperates with the lead screw, one side of the sliding beam away from the control motor is fixedly provided with an impact pad, the lead screw penetrates through the impact pad, the sliding beam is used for controlling the reset of the milling drum.

3. A mill depth feedback based real-time feedback based pavement milling and grading device as claimed in claim 1, wherein: ​ 4. A milling depth based real-time feedback pavement milling grading device according to claim 3, characterized in that: One side of the load-bearing beam is provided with a moving beam, the end of the load-bearing beam and the moving beam is provided with a control cylinder, the load-bearing beam and the moving beam are fixedly connected with the cylinder barrel and the piston rod of the control cylinder respectively, the middle position of the moving beam is fixedly provided with a moving sleeve, the lead screw penetrates through the moving sleeve, the moving sleeve is matched with the impact pad, and the moving beam is slidably connected with the vehicle frame.

5. A mill depth based real-time feedback based pavement milling and grading device as claimed in claim 4, wherein: The middle position of the sliding frame is raised to the side where the vehicle frame is located in an inverted V shape, the load-bearing beam is located on the side away from the vehicle frame, the sliding frame is located between the moving beam and the load-bearing beam, and the two ends of the sliding frame are hollow structures and are penetrated by the guide frame.

6. The mill depth based real-time feedback pavement milling machine leveling device of claim 1, wherein: One side of the sliding frame is fixedly provided with a fixed rod, one end of the fixed rod away from the sliding frame is fixedly provided with a protective cover, the milling drum is located in the protective cover, the end of the milling drum is rotatably connected with the side wall of the protective cover, and one side of the protective cover is fixedly provided with a driving motor.

7. A method for milling and leveling construction of a road surface based on real-time feedback of milling depth, using the milling and leveling device based on real-time feedback of milling depth according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: S1, floating monitoring; the abnormal protrusion condition of the road construction surface is reflected in real time according to the floating condition of the bottom plate, when the bottom plate is detected to be instantaneously lifted, the construction area in front of the milling drum is marked as a leveling area; S2, switching state; when the milling drum passes through the leveling area, the milling drum is lifted and switched to a leveling state, after the milling drum is separated from the vehicle frame, the vehicle frame moves at a constant speed according to the set speed, and the milling drum stays in the leveling area for milling; S3, milling leveling; during the in-situ milling of the milling drum, the milling drum is controlled to slowly descend, the depth of cut is controlled to be always in a suitable range, the milling time of the leveling area is increased, and the milling depth of the leveling area is consistent with that of other construction areas after milling; S4, reset milling; after the milling of the leveling area is completed, the milling drum is controlled to accelerate forward relative to the vehicle frame and to mill, and after the milling drum is reset, the milling continues in a normal state.

Images