Road base laying device and method

Abstract

The invention discloses a road base laying device, and belongs to the field of road laying devices. The device comprises a paver, a bearing hopper is arranged on the paver, a sampling box is arranged at the position, close to the bearing hopper, of the paver, a lifting plate is slidably connected to the bottom of the sampling box, a measuring rod is fixedly connected to the middle of the sampling box, a hole matched with the measuring rod is formed in the middle of the lifting plate, and a pressurizing block is vertically slidably connected to the upper portion of the sampling box. A through hole matched with the measuring rod is formed in the middle of the pressurizing block, a circular plate is slidably connected in the through hole, the pressurizing block can apply pressure to the material in the sampling box, and after the material in the sampling box is compacted, the sliding distance of the circular plate in the through hole is equal to the height change from the material before compaction to the material after compaction; the device can sample laying materials on site during laying to detect the loose coefficient, and the laying accuracy of the thickness of a base layer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of highway paving devices, and in particular to a highway base paving device and method. Background Art

[0002] In highway base construction, accurate measurement of the loose-paving coefficient is crucial for ensuring paving quality. Currently, traditional loose-paving coefficient determination relies on pre-set empirical values or off-site trial paving data, making it difficult to respond in real time to fluctuations in the loose-paving coefficient caused by weather changes and material batch variations.

[0003] In actual construction, varying humidity levels can alter the fluidity of asphalt mixtures. Differences in aggregate gradation and asphalt content between batches can also significantly impact compaction. Existing methods are unable to adjust paving parameters in a timely manner, which can easily lead to deviations in base thickness, resulting in quality issues such as decreased pavement smoothness and insufficient compaction. Furthermore, traditional testing requires individual sampling and offline testing, a cumbersome and time-consuming process that cannot meet the construction site's demand for dynamic adjustment of the loose paving coefficient. Summary of the Invention

[0004] The purpose of the present invention is to provide a highway base paving device and method, which solves the problem that the loose paving coefficient is easily changed during the paving process, resulting in base thickness deviation.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a highway base paving device, comprising a paver, a paver provided with a material receiving hopper, a sampling box provided on the paver near the material receiving hopper, a lifting plate slidably connected to the bottom of the sampling box, a measuring rod fixedly connected to the middle of the sampling box, a hole cooperating with the measuring rod is provided in the middle of the lifting plate, a pressure block is vertically slidably connected to the upper part of the sampling box, a through hole cooperating with the measuring rod is provided in the middle of the pressure block, a circular plate is slidably connected in the through hole, the pressure block can apply pressure to the material in the sampling box, and after the material in the sampling box is compacted, the sliding distance of the circular plate in the through hole is equal to the height change from before compaction to after compaction of the material.

[0006] Preferably, the paver is connected to an electric push rod, the output end of the electric push rod is hinged to the sampling box, the sampling box is rotatably connected to the paver through a rotating shaft, and the paver is provided with a groove that cooperates with the sampling box.

[0007] Preferably, the paver is fixedly connected to a bracket on one side close to the hopper, a material taking barrel is fixedly connected to the bracket, a material discharge barrel is connected to the side wall of the material taking barrel, a first motor is fixedly connected to the end of the material taking barrel, a screw rod is rotatably connected inside the material taking barrel, and the screw rod is connected to the output end of the first motor, and the electric push rod can push the sampling box out of the groove when it is extended, so that the port of the sampling box is located at the lower part of the discharge port of the discharge barrel.

[0008] Preferably, the paver is connected to a hydraulic oil tank, the bottom wall of the sampling box is fixedly connected to a first hydraulic rod, the output end of the first hydraulic rod is fixedly connected to a transmission plate, a transmission rod is fixedly connected between the transmission plate and the lifting plate, a first hydraulic oil pipe is connected between the hydraulic oil tank and the first hydraulic rod, and the first hydraulic oil pipe is connected to a first hydraulic oil pump.

[0009] Preferably, the first hydraulic oil pipe is connected to a box body, and a rectangular block is slidably connected to the box body via a first spring. When the rectangular block slides back and forth on the box body, the first hydraulic rod can reciprocate and extend.

[0010] Preferably, a second motor is fixedly connected to the paver, an output end of the second motor is fixedly connected to a rotating rod, a cam is fixedly connected to the rotating rod, and a side wall of the cam is in contact with the rectangular block.

[0011] Preferably, a second hydraulic rod is fixedly connected to the paver, a second hydraulic oil pipe is connected between the second hydraulic rod and the hydraulic oil tank, a second hydraulic oil pump is connected to the second hydraulic oil pipe, the pressure block is fixedly connected to the output end of the second hydraulic rod, a third hydraulic oil pipe is connected between the second hydraulic oil pipe and the hydraulic oil tank, and a mechanical three-way valve is provided at the connection between the second hydraulic oil pipe and the third hydraulic oil pipe;

[0012] A torsion spring is connected between the valve stem and the valve body of the mechanical three-way valve;

[0013] A receiving ring is rotatably connected to the rotating rod, and a pull rope is connected between the receiving ring and the valve stem. After the receiving ring receives and tightens the pull rope, the mechanical three-way valve operates, so that the second hydraulic rod is connected to the hydraulic oil tank through the third hydraulic oil pipe, so that the second hydraulic rod can be freely extended and retracted, and the rotating rod can rotate relative to the receiving ring.

[0014] Preferably, a paving module is connected to the tail of the paver, and the paving module includes an ironing plate and a third hydraulic rod for adjusting the height of the ironing plate. A fourth hydraulic oil pipe is connected between the third hydraulic rod and the hydraulic oil tank.

[0015] Preferably, the through hole is connected to a pressure transmission pipe, the pressure transmission pipe is connected to a discharge pipe, and an electromagnetic three-way valve is provided at the connection between the pressure transmission pipe and the discharge pipe. When the second hydraulic rod applies pressure to the pressure block, the electromagnetic three-way valve operates so that the through hole is not connected to the discharge pipe.

[0016] The paver is connected to a first piston cylinder and a second piston cylinder, a piston plate is slidably connected in the first piston cylinder, a first piston rod is fixedly connected to the piston plate, an end of the first piston rod is fixedly connected to a mounting plate, a second piston rod is fixedly connected to the mounting plate, the second piston rod is slidably connected in the second piston cylinder, and a fifth hydraulic oil pipe is connected between the second piston cylinder and the fourth hydraulic oil pipe;

[0017] The sliding distance of the piston plate in the first piston cylinder is equal to the sliding distance of the circular plate in the through hole, and the inner diameter of the second piston cylinder is equal to the inner diameter of the cylinder of the third hydraulic rod.

[0018] A highway base paving method, using a highway base paving device, comprises the following steps:

[0019] Adjust the distance between the screed and the roadbed to the height of the target compaction thickness, adjust the height of the lifting plate according to the height of the screed, and change the volume of the sampling box to match the amount of material that can be accommodated by the target compaction thickness;

[0020] Control the electric push rod to extend, push the sampling box to the lower part of the discharge barrel, control the first motor to operate, so that the material in the hopper is transported into the sampling box, observe that the sampling box is full, stop the first motor, and then control the electric push rod to shorten so that the sampling box is reset;

[0021] To heat the sampling box to the required temperature, the electromagnetic three-way valve is controlled to connect the through hole with the discharge pipe, and the second motor is controlled to operate. The rotating rod drives the receiving ring to rotate through friction, which makes the mechanical three-way valve operate, so that the second hydraulic rod can freely retract. The pressure block moves down into the sampling box under gravity. The cam drives the rectangular block to slide back and forth in the box body, causing the first hydraulic rod to reciprocate and extend, applying vibration to the material in the sampling box.

[0022] After the second motor stops running and the torsion spring recovers, the electromagnetic three-way valve is controlled to operate so that the through hole is connected to the first piston cylinder, and the second hydraulic rod is controlled to pressurize the material in the sampling box with different pressures multiple times to compress the material;

[0023] When the through hole is connected to the first piston cylinder, the distance that the circular plate slides under the push of the measuring rod is the height change from before to after compaction of the material, and the piston plate slides a distance equal to that of the circular plate, thereby driving the third hydraulic rod to shorten an equal distance through the second piston cylinder, so that the ironing plate rises to the initial thickness position required to discharge the material to achieve the target compaction thickness.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] When paving the road base, the present invention pours the asphalt paving material onto the receiving hopper, and movable hopper walls are provided on both sides of the receiving hopper. The two movable hopper walls are driven by the driving system of the paver to rotate relative to each other so that the asphalt paving material is pushed to the feeding belt in the middle of the receiving hopper for transportation to the paving module at the rear for paving. Before paving the roadbed, the asphalt paving material in the receiving hopper is first filled into the sampling box, and the asphalt paving material in the sampling box is vibrated so that the asphalt paving material particles are arranged compactly by the vibration. Then, the pressure block is controlled to move into the sampling box, and the pressure block is used to press the asphalt paving material multiple times and in a variety of directions during paving. Pressure is applied to the asphalt paving material in the sampling box. During pressurization, the measuring rod in the sampling box is inserted into the through hole in the middle of the pressure block, and the thickness of the asphalt paving material in the sampling box changes from the initial stage of pressurization to the completion of pressurization, and the position of the pressure block will also change, which causes the position of the circular plate in the through hole to change, and the distance of the position change of the circular plate is the thickness change of the asphalt paving material before and after pressure is applied. The loose paving coefficient can be obtained based on this thickness change, which can deal with the problem that the thickness of the paved asphalt paving material may deviate due to the change in loose paving coefficient caused by weather or changes in the batches of asphalt paving materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 3 It is a structural schematic diagram of the spiral rod of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the lifting plate of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the hydraulic oil tank of the present invention;

[0031] Figure 6 For the present invention Figure 5 Schematic diagram of the structure of part A;

[0032] Figure 7 It is a structural schematic diagram of the second piston cylinder of the present invention.

[0033] In the figure: 100, paver; 110, hopper; 120, feed belt; 130, movable bucket wall; 140, paving module; 150, third hydraulic rod; 151, fourth hydraulic oil pipe; 160, screed; 200, electric push rod; 210, sampling box; 220, measuring rod; 230, lifting plate; 231, transmission rod; 232, transmission plate; 240, first hydraulic rod; 300, first motor; 310, screw rod; 320, bracket; 330, take-up barrel; 340, discharge barrel; 400, hydraulic oil tank; 410, second hydraulic oil pipe; 411, second hydraulic rod; 420, third hydraulic oil pipe; 430, second hydraulic oil pump; 440, first hydraulic Oil pump; 450, first hydraulic oil pipe; 460, mechanical three-way valve; 500, second motor; 510, rotating rod; 520, cam; 530, box body; 540, rectangular block; 550, first spring; 560, storage ring; 570, pull rope; 580, valve stem; 590, torsion spring; 600, pressure block; 610, pressure transmission block; 620, through hole; 630, second spring; 640, circular plate; 650, pressure transmission pipe; 651, discharge pipe; 652, electromagnetic three-way valve; 660, first piston cylinder; 661, piston plate; 662, first piston rod; 670, mounting plate; 680, second piston rod; 690, second piston cylinder; 691, fifth hydraulic oil pipe. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0035] Reference Figure 1-Figure 7 The present embodiment provides a technical solution: a highway base paving device, including a paver 100, a material receiving hopper 110 is provided on the paver 100, a sampling box 210 is provided on the paver 100 near the material receiving hopper 110, the bottom of the sampling box 210 is slidably connected to a lifting plate 230, the middle of the sampling box 210 is fixedly connected to a measuring rod 220, the middle of the lifting plate 230 is provided with a hole that cooperates with the measuring rod 220, the upper part of the sampling box 210 is vertically slidably connected to a pressure block 600, the middle of the pressure block 600 is provided with a through hole 620 that cooperates with the measuring rod 220, and a circular plate 640 is slidably connected in the through hole 620, the pressure block 600 can apply pressure to the material in the sampling box 210, and after the material in the sampling box 210 is compacted, the sliding distance of the circular plate 640 in the through hole 620 is equal to the height change from before compaction to after compaction of the material.

[0036] When paving the highway base, the asphalt paving material is poured onto the receiving hopper 110. Movable hopper walls 130 are provided on both sides of the receiving hopper 110. The two movable hopper walls 130 are driven by the driving system of the paver 100 to rotate relative to each other so that the asphalt paving material is pushed to the feeding belt 120 in the middle of the receiving hopper 110 for transportation to the paving module 140 at the tail for paving. Before paving the roadbed, the asphalt paving material in the receiving hopper 110 is first filled into the sampling box 210, and the asphalt paving material in the sampling box 210 is vibrated so that the asphalt paving material particles are arranged compactly by the vibration. Then, the pressure block 600 is controlled to move into the sampling box 210. The pressure block 600 applies pressure to the asphalt paving material in the sampling box 210 multiple times and with various pressures during paving. For example, the initial pressure is statically pressed by an 18-ton steel wheel and the secondary pressure is statically pressed by a 22-ton steel wheel. After two to three vibration presses, the pressure block 600 applies pressure of eighteen tons to the asphalt paving material in the sampling box 210 once, and then applies pressure of twenty-two tons to the asphalt paving material in the sampling box 210 two to three times. During pressurization, the measuring rod 220 in the sampling box 210 is inserted into the through hole 620 in the middle of the pressure block 600, and the thickness of the asphalt paving material in the sampling box 210 changes from the initial pressurization to the completion of pressurization, and the position of the pressure block 600 will also change, which causes the position of the circular plate 640 in the through hole 620 to change, and the distance of the position change of the circular plate 640 is the thickness change of the asphalt paving material before and after being pressed, so that the loose paving coefficient can be obtained according to this thickness change, thereby coping with the problem that the thickness of the paved asphalt paving material may deviate due to the change of the loose paving coefficient caused by weather or changes in the batches of asphalt paving materials.

[0037] The paver 100 is connected to an electric push rod 200 , the output end of which is hinged to a sampling box 210 , which is rotatably connected to the paver 100 via a rotating shaft. A groove that cooperates with the sampling box 210 is provided on the paver 100 .

[0038] When sampling the asphalt paving material in the hopper 110, the electric push rod 200 is controlled to extend. At this time, the electric push rod 200 pushes the sampling box 210 to swing around the rotating shaft, so that the opening of the sampling box 210 is moved out and is unobstructed, so that the asphalt paving material can be transported into the sampling box 210.

[0039] A bracket 320 is fixedly connected to the side of the paver 100 close to the hopper 110, and a material taking barrel 330 is fixedly connected to the bracket 320. A material discharge barrel 340 is connected to the side wall of the material taking barrel 330. The end of the material taking barrel 330 is fixedly connected to the first motor 300. A screw rod 310 is rotatably connected inside the material taking barrel 330. The screw rod 310 is connected to the output end of the first motor 300. When the electric push rod 200 is extended, it can push the sampling box 210 out of the groove, so that the port of the sampling box 210 is located at the lower part of the discharge port of the discharge barrel 340.

[0040] After the sampling box 210 is rotated, its opening can be at the lower part of the discharge barrel 340. After the asphalt paving material is added to the hopper 110, the material collection barrel 330 is in a state of being inserted into the asphalt paving material. At this time, the first motor 300 is started, so that the first motor 300 drives the screw rod 310 to rotate in the material collection barrel 330, so that the screw rod 310 can transport the asphalt paving material into the sampling box 210. After observing that the asphalt paving material in the sampling box 210 is full, the first motor 300 is controlled to stop running, and then the electric push rod 200 is driven to shorten. During the shortening process of the electric push rod 200, the asphalt paving material that may fall on the top of the measuring rod 220 and the opening of the sampling box 210 at a high place is manually removed to complete the material collection of the sampling box 210.

[0041] A hydraulic oil tank 400 is connected to the paver 100, a first hydraulic rod 240 is fixedly connected to the bottom wall of the sampling box 210, a transmission plate 232 is fixedly connected to the output end of the first hydraulic rod 240, a transmission rod 231 is fixedly connected between the transmission plate 232 and the lifting plate 230, a first hydraulic oil pipe 450 is connected between the hydraulic oil tank 400 and the first hydraulic rod 240, and a first hydraulic oil pump 440 is connected to the first hydraulic oil pipe 450.

[0042] The hydraulic system on the paver 100 controls the operation of the first hydraulic oil pump 440 to cause the first hydraulic rod 240 to extend and retract, so that the first hydraulic rod 240 drives the lifting plate 230 to slide in the sampling box 210, changing the position of the lifting plate 230 in the sampling box 210, so that the volume of the asphalt paving material stored in the sampling box 210 is changed, and the position of the lifting plate 230 is calculated based on the target thickness of the paving, so that the height of the asphalt paving material received in the sampling box 210 is about six centimeters higher than the target thickness of the paving.

[0043] The first hydraulic oil pipe 450 is connected to a box body 530 , and a rectangular block 540 is slidably connected to the box body 530 via a first spring 550 . When the rectangular block 540 slides back and forth on the box body 530 , the first hydraulic rod 240 can reciprocate and extend.

[0044] After the sampling box 210 completes the material collection and is reset, the operation of the first hydraulic oil pump 440 is stopped. All hydraulic oil pumps have a non-return function when they stop running, so that the length of the first hydraulic rod 240 is maintained. The box body 530 is arranged between the first hydraulic oil pump 440 and the first hydraulic rod 240 on the first hydraulic oil pipe 450, so that when the rectangular block 540 slides back and forth in the box body 530, the hydraulic oil in the first hydraulic rod 240 can switch back and forth between flowing into and out of the first hydraulic oil pipe 450, so that the first hydraulic rod 240 can reciprocate and extend, thereby driving the lifting plate 230 to rise and fall vertically in the sampling box 210, so that the asphalt paving material in the sampling box 210 is gradually compacted after being vibrated.

[0045] The paver 100 is fixedly connected to a second motor 500 , an output end of the second motor 500 is fixedly connected to a rotating rod 510 , and a cam 520 is fixedly connected to the rotating rod 510 . The side wall of the cam 520 is in contact with the rectangular block 540 .

[0046] The reciprocating movement of the rectangular block 540 is achieved by the alternating push of the cam 520 and the first spring 550. When the second motor 500 is started, the rotating rod 510 drives the cam 520 to rotate. At this time, the cam 520 intermittently applies a thrust to the rectangular block 540, so that the rectangular block 540 overcomes the elastic force of the first spring 550 and slides, and is then pushed back to its original position by the first spring 550. The speed of the second motor 500 is controlled by the speed regulator. When the speed of the second motor 500 increases, the lifting frequency of the lifting plate 230 can be increased, which in turn increases the vibration frequency of the asphalt paving material in the sampling box 210. The speed of the second motor 500 is adjusted according to actual needs so that the vibration of the asphalt paving material in the sampling box 210 is close to the vibration state during actual paving.

[0047] A second hydraulic rod 411 is fixedly connected to the paver 100. A second hydraulic oil pipe 410 is connected between the second hydraulic rod 411 and the hydraulic oil tank 400. A second hydraulic oil pump 430 is connected to the second hydraulic oil pipe 410. A pressure block 600 is fixedly connected to the output end of the second hydraulic rod 411. A third hydraulic oil pipe 420 is connected between the second hydraulic oil pipe 410 and the hydraulic oil tank 400. A mechanical three-way valve 460 is provided at the connection between the second hydraulic oil pipe 410 and the third hydraulic oil pipe 420. A torsion spring 590 is connected between the valve stem 580 and the valve body of the mechanical three-way valve 460; a receiving ring 560 is rotatably connected to the rotating rod 510, and a pull rope 570 is connected between the receiving ring 560 and the valve stem 580. After the receiving ring 560 receives and tightens the pull rope 570, the mechanical three-way valve 460 operates, so that the second hydraulic rod 411 is connected to the hydraulic oil tank 400 through the third hydraulic oil pipe 420, so that the second hydraulic rod 411 can be freely extended and retracted, and the rotating rod 510 can rotate relative to the receiving ring 560.

[0048] In order to prevent the asphalt paving material in the sampling box 210 from being separated from the sampling box 210 when it is vibrated, when the second motor 500 is started, the rotating rod 510 drives the receiving ring 560 to rotate by friction, so that the receiving ring 560 receives the pull rope 570. During the receiving process, the pull rope 570 is released from the valve stem 580. At this time, the valve stem 580 rotates, thereby operating the mechanical three-way valve 460, so that the second hydraulic rod 411 is directly connected to the hydraulic oil tank 400 through the third hydraulic oil pipe 420. At this time, the hydraulic oil can flow freely between the second hydraulic rod 411 and the hydraulic oil tank 400, thereby pressurizing the block 60. 0 can fall into the sampling box 210 under gravity, so that the opening of the sampling box 210 is blocked, thereby preventing the asphalt paving material in the sampling box 210 from being vibrated and discharged from the sampling box 210; when the second motor 500 stops running, the torsion spring 590 applies a reset force to the valve stem 580, causing the valve stem 580 to rotate back, so that the second hydraulic rod 411 is no longer connected to the third hydraulic oil pipe 420 but is connected to the hydraulic oil tank 400 through the second hydraulic oil pipe 410; at this time, when the second hydraulic oil pump 430 on the second hydraulic oil pipe 410 is not running, the second hydraulic rod 411 cannot freely extend or retract.

[0049] The rear end of the paver 100 is connected to a paving module 140 . The paving module 140 includes an ironing plate 160 and a third hydraulic rod 150 for adjusting the height of the ironing plate 160 . A fourth hydraulic oil pipe 151 is connected between the third hydraulic rod 150 and the hydraulic oil tank 400 .

[0050] The hydraulic system on the paver 100 controls the extension and retraction of the third hydraulic rod 150 so that the height of the screed plate 160 from the roadbed is equal to the target thickness of the asphalt paving material after rolling. Then, based on this thickness, the thickness change of the asphalt paving material in the sampling box 210 before and after compaction is added to obtain the initial thickness of the asphalt paving material to be laid.

[0051] The through hole 620 is connected to a pressure transmission pipe 650, and the pressure transmission pipe 650 is connected to a discharge pipe 651. An electromagnetic three-way valve 652 is provided at the connection between the pressure transmission pipe 650 and the discharge pipe 651. When the second hydraulic rod 411 applies pressure to the pressure block 600, the electromagnetic three-way valve 652 operates so that the through hole 620 is not connected to the discharge pipe 651; the paver 100 is connected to a first piston cylinder 660 and a second piston cylinder 690. A piston plate 661 is slidably connected in the first piston cylinder 660, and a first piston is fixedly connected to the piston plate 661. Rod 662, the end of the first piston rod 662 is fixedly connected to the mounting plate 670, and the second piston rod 680 is fixedly connected to the mounting plate 670. The second piston rod 680 is slidably connected in the second piston cylinder 690, and a fifth hydraulic oil pipe 691 is connected between the second piston cylinder 690 and the fourth hydraulic oil pipe 151; the sliding distance of the piston plate 661 in the first piston cylinder 660 is equal to the sliding distance of the circular plate 640 in the through hole 620, and the inner diameter of the second piston cylinder 690 is equal to the inner diameter of the cylinder body of the third hydraulic rod 150.

[0052] The sampling box 210 is provided with an electric heating wire to maintain the desired temperature of the asphalt paving material inside. The temperature of the sampling box 210 can also be increased by spraying a flame onto the sampling box 210 from the outside.

[0053] When vibration is applied to the sampling box 210, the pressure block 600 is in a state of being located inside the sampling box 210. At this time, the electromagnetic three-way valve 652 is controlled to operate so that the through hole 620 is connected to the discharge pipe 651. Therefore, when the measuring rod 220 pushes the circular plate 640 to slide, the medium in the through hole 620 will only be discharged through the discharge pipe 651. After vibration is applied to the sampling box 210, the electromagnetic three-way valve 652 is controlled to operate so that the through hole 620 is connected to the first piston cylinder 660 through the pressure transmission pipe 650. Therefore, when the pressure block 600 subsequently pressurizes the asphalt paving material in the sampling box 210 so that the circular plate 640 is pushed by the measuring rod 220 and slides in the through hole 620, the medium in the through hole 620 can be transmitted to the first piston cylinder 660. The piston cylinder 660 is provided with an inner diameter thereof so that the sliding distance of the circular plate 640 drives the sliding distance of the piston plate 661 to be equal, thereby making the piston plate 661 drive the second piston rod 680 to slide outward in the second piston cylinder 690 to be equal to the sliding distance of the circular plate 640. The inner diameter of the second piston cylinder 690 is equal to the inner diameter of the cylinder of the third hydraulic rod 150, thereby transmitting the power to the third hydraulic rod 150 so that the shortened distance of the third hydraulic rod 150 is also equal to the sliding distance of the circular plate 640, thereby making the ironing plate 160 rise by the sliding distance of the circular plate 640. At this time, the distance between the ironing plate 160 and the roadbed is equal to the target rolling distance plus the thickness change distance during rolling.

[0054] In addition, a one-way valve is also provided on the fifth hydraulic oil pipe 691 so that only the second piston cylinder 690 can extract the hydraulic oil through the fifth hydraulic oil pipe 691 without backflow, thereby ensuring the stability of the length of the third hydraulic rod 150;

[0055] The bottom end of the pressure block 600 is also connected to the pressure transmission block 610. There is a gap between the pressure transmission block 610 and the sampling box 210, so that the asphalt paving material in the sampling box 210 can enter this gap after being rolled, so that the pressure at the edge of the asphalt paving material is not too high when it is squeezed, simulating the state that the edge of the asphalt paving material is not squeezed during actual rolling. The through hole 620 runs through the pressure block 600 and the pressure transmission block 610. A second spring 630 is connected between the circular plate 640 and the top wall of the through hole 620. When the asphalt paving material is manually vibrated and the particles are rearranged, the lifting plate 230 no longer moves back and forth. The second spring 630 pushes the circular plate 640 to contact the measuring rod 220, ensuring subsequent precise transmission.

[0056] A highway base paving method, using a highway base paving device, comprises the following steps:

[0057] Adjust the distance between the screed plate 160 and the roadbed to the height of the target compaction thickness, adjust the height of the lifting plate 230 according to the height of the screed plate 160, and change the volume of the sampling box 210 to match the amount of material contained in the target compaction thickness;

[0058] The electric push rod 200 is controlled to extend to push the sampling box 210 to the lower part of the discharge barrel 340, and the first motor 300 is controlled to operate so that the material in the hopper 110 is transported into the sampling box 210. When the sampling box 210 is full, the first motor 300 is stopped and the electric push rod 200 is controlled to shorten so that the sampling box 210 is reset.

[0059] To heat the sampling box 210 to the desired temperature, the electromagnetic three-way valve 652 is controlled to connect the through hole 620 with the discharge pipe 651. The second motor 500 is controlled to operate, and the rotating rod 510 drives the receiving ring 560 to rotate through friction, causing the mechanical three-way valve 460 to operate. As a result, the second hydraulic rod 411 is free to retract, and the pressure block 600 moves downward into the sampling box 210 under gravity. The cam 520 drives the rectangular block 540 to slide back and forth within the box body 530, causing the first hydraulic rod 240 to reciprocate and extend, applying vibration to the material in the sampling box 210.

[0060] After the second motor 500 is stopped and the torsion spring 590 is restored, the electromagnetic three-way valve 652 is controlled to operate so that the through hole 620 is connected to the first piston cylinder 660, and the second hydraulic rod 411 is controlled to pressurize the material in the sampling box 210 with different pressures multiple times to compress the material;

[0061] When the through hole 620 is connected to the first piston cylinder 660, the distance that the circular plate 640 slides under the push of the measuring rod 220 is the height change from before to after compaction of the material, and the piston plate 661 slides a distance equal to that of the circular plate 640, thereby driving the third hydraulic rod 150 to shorten an equal distance through the second piston cylinder 690, so that the ironing plate 160 rises to the initial thickness position where the material needs to be discharged to achieve the target compaction thickness.

[0062] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A road base paving device, comprising a paver (100), wherein the paver (100) is provided with a hopper (110), characterized in that: A sampling box (210) is provided on the paver (100) near the hopper (110), the bottom of the sampling box (210) is slidably connected to a lifting plate (230), a measuring rod (220) is fixedly connected to the middle of the sampling box (210), a hole is provided in the middle of the lifting plate (230) for matching with the measuring rod (220), and a pressure block (600) is vertically slidably connected to the upper part of the sampling box (210). A through hole (620) cooperating with the measuring rod (220) is provided in the middle of the pressure block (600), and a circular plate (640) is slidably connected in the through hole (620). The pressure block (600) can apply pressure to the material in the sampling box (210), and after the material in the sampling box (210) is compacted, the sliding distance of the circular plate (640) in the through hole (620) is equal to the height change of the material before and after compaction.

2. The highway base paving device according to claim 1, characterized in that: The paver (100) is connected to an electric push rod (200), the output end of the electric push rod (200) is hinged to the sampling box (210), the sampling box (210) is rotatably connected to the paver (100) via a rotating shaft, and the paver (100) is provided with a groove that cooperates with the sampling box (210).

3. The highway base paving device according to claim 2, characterized in that: The paving machine (100) is fixedly connected to a bracket (320) on one side close to the hopper (110), and a material taking barrel (330) is fixedly connected to the bracket (320). A material discharge barrel (340) is connected to the side wall of the material taking barrel (330). The end of the material taking barrel (330) is fixedly connected to a first motor (300). A screw rod (310) is rotatably connected inside the material taking barrel (330), and the screw rod (310) is connected to the output end of the first motor (300). When the electric push rod (200) is extended, the sampling box (210) can be pushed out of the groove, so that the port of the sampling box (210) is located at the lower part of the discharge port of the discharge barrel (340).

4. The highway base paving device according to claim 3, characterized in that: The paver (100) is connected to a hydraulic oil tank (400), the bottom wall of the sampling box (210) is fixedly connected to a first hydraulic rod (240), the output end of the first hydraulic rod (240) is fixedly connected to a transmission plate (232), a transmission rod (231) is fixedly connected between the transmission plate (232) and the lifting plate (230), a first hydraulic oil pipe (450) is connected between the hydraulic oil tank (400) and the first hydraulic rod (240), and a first hydraulic oil pump (440) is connected to the first hydraulic oil pipe (450).

5. The highway base paving device according to claim 4, characterized in that: The first hydraulic oil pipe (450) is connected to a box body (530), and a rectangular block (540) is slidably connected to the box body (530) via a first spring (550). When the rectangular block (540) slides back and forth on the box body (530), the first hydraulic rod (240) can reciprocate and extend.

6. The highway base paving device according to claim 5, characterized in that: A second motor (500) is fixedly connected to the paver (100), a rotating rod (510) is fixedly connected to the output end of the second motor (500), a cam (520) is fixedly connected to the rotating rod (510), and a side wall of the cam (520) is in contact with the rectangular block (540).

7. The highway base paving device according to claim 6, characterized in that: A second hydraulic rod (411) is fixedly connected to the paver (100); a second hydraulic oil pipe (410) is connected between the second hydraulic rod (411) and the hydraulic oil tank (400); a second hydraulic oil pump (430) is connected to the second hydraulic oil pipe (410); the pressure block (600) is fixedly connected to the output end of the second hydraulic rod (411); a third hydraulic oil pipe (420) is connected between the second hydraulic oil pipe (410) and the hydraulic oil tank (400); a mechanical three-way valve (460) is provided at the connection between the second hydraulic oil pipe (410) and the third hydraulic oil pipe (420); A torsion spring (590) is connected between the valve stem (580) and the valve body of the mechanical three-way valve (460); A receiving ring (560) is rotatably connected to the rotating rod (510), and a pull rope (570) is connected between the receiving ring (560) and the valve stem (580). After the receiving ring (560) receives and tightens the pull rope (570), the mechanical three-way valve (460) operates, so that the second hydraulic rod (411) is connected to the hydraulic oil tank (400) through the third hydraulic oil pipe (420), so that the second hydraulic rod (411) can be freely extended and retracted, and the rotating rod (510) can be rotated relative to the receiving ring (560).

8. The highway base paving device according to claim 7, characterized in that: The rear end of the paving machine (100) is connected to a paving module (140), the paving module (140) comprising an ironing plate (160) and a third hydraulic rod (150) for adjusting the height of the ironing plate (160), and a fourth hydraulic oil pipe (151) is connected between the third hydraulic rod (150) and the hydraulic oil tank (400).

9. The highway base paving device according to claim 8, characterized in that: The through hole (620) is connected to a pressure transmission pipe (650), and the pressure transmission pipe (650) is connected to a discharge pipe (651). An electromagnetic three-way valve (652) is provided at the connection between the pressure transmission pipe (650) and the discharge pipe (651). When the second hydraulic rod (411) applies pressure to the pressure block (600), the electromagnetic three-way valve (652) operates, so that the through hole (620) is not connected to the discharge pipe (651). The paving machine (100) is connected to a first piston cylinder (660) and a second piston cylinder (690), wherein a piston plate (661) is slidably connected in the first piston cylinder (660), a first piston rod (662) is fixedly connected to the piston plate (661), an end of the first piston rod (662) is fixedly connected to a mounting plate (670), a second piston rod (680) is fixedly connected to the mounting plate (670), the second piston rod (680) is slidably connected in the second piston cylinder (690), and a fifth hydraulic oil pipe (691) is connected between the second piston cylinder (690) and the fourth hydraulic oil pipe (151); The sliding distance of the piston plate (661) in the first piston cylinder (660) is equal to the sliding distance of the circular plate (640) in the through hole (620), and the inner diameter of the second piston cylinder (690) is equal to the inner diameter of the cylinder of the third hydraulic rod (150).

10. A method for laying a highway base layer, using the highway base layer laying device according to claim 9, characterized in that: The following steps are involved: Adjusting the distance between the screed plate (160) and the roadbed to a height corresponding to a target compaction thickness, adjusting the height of the lifting plate (230) according to the height of the screed plate (160), and changing the volume of the sampling box (210) to a volume corresponding to a material volume that matches the target compaction thickness; The electric push rod (200) is controlled to extend, and the sampling box (210) is pushed to the lower part of the discharge barrel (340), and the first motor (300) is controlled to operate so that the material in the hopper (110) is transported into the sampling box (210). After the sampling box (210) is observed to be full, the operation of the first motor (300) is stopped, and the electric push rod (200) is controlled to shorten so that the sampling box (210) is reset; In order to heat the sampling box (210) to a desired temperature, the electromagnetic three-way valve (652) is controlled so that the through hole (620) is connected to the discharge pipe (651), and the second motor (500) is controlled to operate. The rotating rod (510) drives the receiving ring (560) to rotate through friction, so that the mechanical three-way valve (460) operates, so that the second hydraulic rod (411) is freely contracted, and the pressure block (600) moves downward into the sampling box (210) under gravity. The cam (520) drives the rectangular block (540) to slide back and forth in the box body (530), so that the first hydraulic rod (240) reciprocates and contracts, thereby applying vibration to the material in the sampling box (210); After the second motor (500) stops running and the torsion spring (590) recovers, the electromagnetic three-way valve (652) is controlled to operate so that the through hole (620) is connected to the first piston cylinder (660), and the second hydraulic rod (411) is controlled to apply pressure to the material in the sampling box (210) at different pressures multiple times, so that the material is compressed; When the through hole (620) is connected to the first piston cylinder (660), the distance that the circular plate (640) slides under the push of the measuring rod (220) is the height change from before the material is compacted to after the compaction, and the piston plate (661) slides a distance equal to that of the circular plate (640), thereby driving the third hydraulic rod (150) to shorten the same distance through the second piston cylinder (690), so that the ironing plate (160) rises to the initial thickness position required to discharge the material to achieve the target compaction thickness.

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