A highway base laying device and method

Abstract

This invention discloses a highway base course paving device, belonging to the field of highway paving devices. The device includes a paver with a material hopper. A sampling box is located near the hopper on 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 for the measuring rod is opened 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 for the measuring rod is opened in the middle of the pressure block. A circular plate is slidably connected inside the through hole. The pressure block can apply pressure to the material inside the sampling box. After the material inside the sampling box is compacted, the sliding distance of the circular plate within the through hole is equal to the change in height of the material from before to after compaction. This device can sample and test the looseness coefficient of the paving material on-site during paving, improving the accuracy of base course thickness paving.

Description

Technical Field

[0001] This invention relates to the field of highway paving equipment technology, specifically to a highway base course paving device and method. Background Technology

[0002] In highway base course construction, accurate determination of the loose paving coefficient is crucial to ensuring paving quality. Currently, traditional methods for determining the loose paving coefficient largely rely 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 batch differences in materials.

[0003] In actual construction, varying humidity levels alter the fluidity of asphalt mixtures, and differences in aggregate gradation and asphalt content between different batches significantly affect compaction. Existing methods cannot adjust paving parameters in a timely manner, easily leading to deviations in base course thickness, which in turn causes quality problems such as reduced pavement smoothness and insufficient compaction. Furthermore, traditional testing requires separate sampling and offline testing, a cumbersome process with poor timeliness, failing to meet the needs of dynamic adjustment of the loose paving coefficient at construction sites. Summary of the Invention

[0004] The purpose of this invention is to provide a highway base course paving device and method, which solves the problem of base course thickness deviation caused by easy changes in the loose paving coefficient during the paving process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a highway base course paving device, including a paver, a material receiving hopper on the paver, a sampling box near the material receiving hopper on the paver, 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 in the middle of the lifting plate that mates with the measuring rod, a pressure block vertically slidably connected to the upper part of the sampling box, a through hole in the middle of the pressure block that mates with the measuring rod, a circular plate slidably connected inside the through hole, the pressure block being able to apply pressure to the material inside the sampling box, and after the material inside the sampling box is compacted, the sliding distance of the circular plate in the through hole is equal to the change in height of the material from before compaction to after compaction.

[0006] Preferably, the paver is equipped with an electric push rod, the output end of which is hinged to the sampling box. The sampling box is rotatably connected to the paver via a rotating shaft, and the paver has a groove that mates with the sampling box.

[0007] Preferably, a support is fixedly connected to the side of the paver near the material receiving hopper, a material receiving cylinder is fixedly connected to the support, a discharge cylinder is connected to the side wall of the material receiving cylinder, a first motor is fixedly connected to the end of the material receiving cylinder, a screw rod is rotatably connected inside the material receiving cylinder, the screw rod is connected to the output end of the first motor, and when the electric push rod extends, it can push the sampling box out of the groove, so that the port of the sampling box is located below the discharge port of the discharge cylinder.

[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 a first hydraulic oil pump is connected to the first hydraulic oil pipe.

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

[0010] Preferably, a second motor is fixedly connected to the paver, a rotating rod is fixedly connected to the output end of the second motor, a cam is fixedly connected to the rotating rod, and the 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 storage ring is rotatably connected to the rotating rod, and a pull rope is connected between the storage ring and the valve stem. After the storage ring stores and tightens the pull rope, the mechanical three-way valve operates, allowing the second hydraulic rod to connect to the hydraulic oil tank through the third hydraulic oil pipe. This allows the second hydraulic rod to extend and retract freely, and the rotating rod to rotate relative to the storage ring.

[0014] Preferably, the paver is connected to a paving module at its rear. The paving module includes a screed and a third hydraulic rod for adjusting the height of the screed. A fourth hydraulic pipe is connected between the third hydraulic rod and the hydraulic tank.

[0015] Preferably, a pressure transmission pipe is connected to the through hole, and a discharge pipe is connected to the pressure transmission pipe. 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 inside the first piston cylinder. A first piston rod is fixedly connected to the piston plate. An mounting plate is fixedly connected to the end of the first piston rod. A second piston rod is fixedly connected to the mounting plate. The second piston rod is slidably connected inside the second piston cylinder. 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 method for laying a highway base course, using a highway base course laying device, includes 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. Change the volume of the sampling box to match the amount of material that can be contained for the target compaction thickness.

[0020] The electric push rod is extended to push the sampling box to the lower part of the feeding cylinder. The first motor is controlled to run, so that the material in the receiving hopper is transported into the sampling box. After the sampling box is full, the first motor is stopped. Then the electric push rod is controlled to shorten so that the sampling box is reset.

[0021] To heat the sampling box to the required temperature, control the electromagnetic three-way valve to connect the through hole with the discharge pipe, control the second motor to run, and drive the rotating rod to rotate the receiving ring through friction, thereby operating the mechanical three-way valve. This causes the second hydraulic rod to retract freely, and 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, causing the first hydraulic rod to extend and retract back and forth, applying vibration to the material in the sampling box.

[0022] After the second motor stops running and the torsion spring returns to its original position, the electromagnetic three-way valve is controlled to operate, so that the through hole is connected to the first piston cylinder. The second hydraulic rod is controlled to apply pressure to the material in the sampling box at different pressures multiple times, so that the material is compressed.

[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 change in height from before to after the material is compacted, and the distance that the piston plate slides is equal to that of the circular plate. Thus, the second piston cylinder drives the third hydraulic rod to shorten the distance by the same amount, so that the ironing plate rises to the initial thickness position where the material needs to be discharged to achieve the target compaction thickness.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] In this invention, during the paving of highway base courses, asphalt paving material is poured onto a receiving hopper. Movable hopper walls are located on both sides of the hopper. These two walls are driven by the paver's drive system to rotate relative to each other, pushing the asphalt paving material onto the feeding belt in the middle of the hopper for transport 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 a sampling box. Vibration is then applied to the asphalt paving material in the sampling box to compact the asphalt particles. A pressure block is then moved into the sampling box, applying multiple pressures to the asphalt paving material during paving. Pressure is applied to the asphalt pavement inside the sampling box. During pressurization, the measuring rod inside the sampling box is inserted into the through hole in the middle of the pressure block. The thickness of the asphalt pavement inside the sampling box changes from the initial stage to the end of pressurization, and the position of the pressure block also changes. This causes the position of the circular plate in the through hole to change, and the distance of the circular plate's position change is the thickness change of the asphalt pavement before and after pressure. Based on this thickness change, the loose paving coefficient can be obtained. This can address the problem that the thickness of the paved asphalt pavement may deviate due to changes in the loose paving coefficient caused by weather or batch changes in asphalt pavement materials. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0028] Figure 3 This is a schematic diagram of the structure of the screw rod in this invention;

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

[0030] Figure 5 This is a schematic diagram of the structure of the hydraulic oil tank in this invention;

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

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

[0033] In the diagram: 100, paver; 110, hopper; 120, feed belt; 130, movable hopper wall; 140, paving module; 150, third hydraulic rod; 151, fourth hydraulic hose; 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, auger; 320, support; 330, material collection cylinder; 340, material discharge cylinder; 400, hydraulic oil tank; 410, second hydraulic hose; 411, second hydraulic rod; 420, third hydraulic hose; 430, second hydraulic pump; 440, first hydraulic pump. Hydraulic pump; 450, First hydraulic oil pipe; 460, Mechanical three-way valve; 500, Second motor; 510, Rotary 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, Solenoid 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 Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Reference Figures 1-7 This embodiment provides a technical solution: a highway base paving device, including a paver 100, a material receiving hopper 110 on the paver 100, a sampling box 210 near the material receiving hopper 110 on the paver 100, a lifting plate 230 slidably connected to the bottom of the sampling box 210, a measuring rod 220 fixedly connected to the middle of the sampling box 210, a hole in the middle of the lifting plate 230 that mates with the measuring rod 220, a pressure block 600 vertically slidably connected to the upper part of the sampling box 210, a through hole 620 in the middle of the pressure block 600 that mates with the measuring rod 220, a circular plate 640 slidably connected inside 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 change in height of the material from before compaction to after compaction.

[0036] When laying the road base course, asphalt paving material is poured onto the receiving hopper 110. Movable hopper walls 130 are installed on both sides of the receiving hopper 110. Driven by the paver 100's drive system, the two movable hopper walls 130 can rotate relative to each other, pushing the asphalt paving material onto the feeding belt 120 in the middle of the receiving hopper 110 for transport to the paving module 140 at the rear for paving. Before paving the roadbed, the sampling box 210 is first filled with asphalt paving material from the receiving hopper 110, and vibration is applied to the asphalt paving material in the sampling box 210 to compact the asphalt paving particles. Then, the pressure block 600 is moved into the sampling box 210. The pressure block 600 applies pressure to the asphalt paving material in the sampling box 210 multiple times and at various pressures during paving, for example, initial compaction using an 18-ton steel wheel for static compaction, and secondary compaction using a 22-ton steel wheel. After two to three passes of vibration and compaction, the pressure block 600 applies 18 tons of pressure to the asphalt pavement in the sampling box 210 once, and then applies 22 tons of pressure to the asphalt pavement in the sampling box 210 two to three times. During the compaction, the measuring rod 220 in the sampling box 210 is inserted into the through hole 620 in the middle of the pressure block 600. The thickness of the asphalt pavement in the sampling box 210 changes from the initial stage of compaction to the completion of compaction, and the position of the pressure block 600 also changes. This 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 pavement before and after compaction. Based on this thickness change, the loose paving coefficient can be obtained. This can address the problem that the thickness of the paved asphalt pavement may deviate due to changes in the loose paving coefficient caused by weather or batch changes in asphalt pavement materials.

[0037] An electric push rod 200 is connected to the paver 100. 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 through a rotating shaft. The paver 100 has a groove that matches the sampling box 210.

[0038] When sampling the asphalt paving material in the hopper 110, the electric push rod 200 is extended. At this time, the electric push rod 200 pushes the sampling box 210 to swing around the pivot, so that the opening of the sampling box 210 can move out without obstruction, thereby enabling the asphalt paving material to be transported into the sampling box 210.

[0039] A support 320 is fixedly connected to the side of the paver 100 near the material receiving hopper 110. A material receiving cylinder 330 is fixedly connected to the support 320. A discharge cylinder 340 is connected to the side wall of the material receiving cylinder 330. A first motor 300 is fixedly connected to the end of the material receiving cylinder 330. A screw rod 310 is rotatably connected inside the material receiving cylinder 330. The screw rod 310 is connected to the output end of the first motor 300. When the electric push rod 200 extends, it can push the sampling box 210 out of the groove, so that the port of the sampling box 210 is located below the discharge port of the discharge cylinder 340.

[0040] After the sampling box 210 rotates, its opening can be located at the lower part of the feeding cylinder 340. After the asphalt paving material is added into the receiving hopper 110, the feeding cylinder 330 is in the state of being inserted into the asphalt paving material. At this time, the first motor 300 is started, and the first motor 300 drives the screw rod 310 to rotate in the feeding cylinder 330. Thus, 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 position can be manually removed to complete the material taking 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. 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, causing the first hydraulic rod 240 to extend and retract. This causes the first hydraulic rod 240 to drive the lifting plate 230 to slide within the sampling box 210, changing the position of the lifting plate 230 within the sampling box 210. This alters the volume of asphalt paving material stored in the sampling box 210. Furthermore, the position of the lifting plate 230 is calculated based on the target compaction thickness of the paving, ensuring that the height of the asphalt paving material received within the sampling box 210 is approximately six centimeters higher than the target compaction thickness.

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

[0044] After the sampling box 210 completes material collection and resets, the operation of the first hydraulic oil pump 440 is stopped. All hydraulic oil pumps have a non-reverse function when stopped, thus maintaining the length of the first hydraulic rod 240. The box body 530 is set on the first hydraulic oil pipe 450 between the first hydraulic oil pump 440 and the first hydraulic rod 240. 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 in and out of the first hydraulic oil pipe 450, thereby causing the first hydraulic rod 240 to reciprocate and extend, thereby driving the lifting plate 230 to vertically rise and fall in the sampling box 210, so that the asphalt paving material in the sampling box 210 is vibrated and gradually compacted.

[0045] 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. 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 pushing force to the rectangular block 540, so that the rectangular block 540 slides against the elastic force of the first spring 550 and is 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 also increases the vibration frequency of the asphalt paving material in the sampling box 210. The speed of the second motor 500 can be 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 extend and retract freely, and the rotating rod 510 can rotate relative to the receiving ring 560.

[0048] To prevent the asphalt paving material inside the sampling box 210 from detaching due to vibration, when the second motor 500 starts, the rotating rod 510 drives the collecting ring 560 to rotate by friction, thereby collecting the pull rope 570. During the collection process, the pull rope 570 is released from the valve stem 580, which then rotates, causing the mechanical three-way valve 460 to operate. This allows the second hydraulic rod 411 to be 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. The asphalt paving material inside the sampling box 210 is able to fall into the sampling box 210 under gravity, thus blocking the opening of the sampling box 210 and preventing the asphalt paving material inside the sampling box 210 from being dislodged by vibration. 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, the second hydraulic oil pump 430 on the second hydraulic oil pipe 410 is not running, so the second hydraulic rod 411 cannot extend or retract freely.

[0049] The paver 100 is connected to a paving module 140 at its tail. The paving module 140 includes a screed 160 and a third hydraulic rod 150 for adjusting the height of the screed 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 160 from the roadbed is equal to the target thickness of the asphalt pavement after compaction. Then, the initial thickness of the asphalt pavement to be laid can be obtained by adding the thickness change of the asphalt pavement before and after compaction in the sampling box 210 to this thickness.

[0051] A pressure transmission pipe 650 is connected to the through hole 620, and a discharge pipe 651 is connected to the pressure transmission pipe 650. An electromagnetic three-way valve 652 is installed 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, preventing the through hole 620 from connecting to the discharge pipe 651. A first piston cylinder 660 and a second piston cylinder 690 are connected to the paver 100. A piston plate 661 is slidably connected inside the first piston cylinder 660, and a first piston is fixedly connected to the piston plate 661. The first piston rod 662 has a mounting plate 670 fixedly connected to its end. A second piston rod 680 is fixedly connected to the mounting plate 670. The second piston rod 680 is slidably connected inside the second piston cylinder 690. A fifth hydraulic oil pipe 691 connects the second piston cylinder 690 and the fourth hydraulic oil pipe 151. The sliding distance of the piston plate 661 inside the first piston cylinder 660 is equal to the sliding distance of the circular plate 640 inside the through hole 620. The inner diameter of the second piston cylinder 690 is equal to the inner diameter of the cylinder of the third hydraulic rod 150.

[0052] The sampling box 210 is equipped with an electric heating wire to maintain the required temperature of the internal asphalt paving material. Alternatively, the temperature of the sampling box 210 can be increased by spraying flames from the outside onto the sampling box 210.

[0053] When vibration is applied to the sampling box 210, the pressure block 600 is positioned inside the sampling box 210. At this time, the solenoid three-way valve 652 is activated, connecting the through hole 620 to the discharge pipe 651. Therefore, when the measuring rod 220 pushes the circular plate 640 to slide, the medium inside the through hole 620 will only be discharged through the discharge pipe 651. After vibration is applied to the sampling box 210, the solenoid three-way valve 652 is activated, connecting the through hole 620 to the first piston cylinder 660 through the pressure transmission pipe 650. Subsequently, when the pressure block 600 pressurizes the asphalt paving material inside the sampling box 210, causing the circular plate 640 to slide within the through hole 620 under the pressure of the measuring rod 220, the medium inside the through hole 620 can be transmitted to the first piston cylinder 660. Inside the piston cylinder 660, the inner diameter of the first piston cylinder 660 is set so that the sliding distance of the circular plate 640 drives the sliding distance of the piston plate 661 to be equal. This causes the piston plate 661 to drive the second piston rod 680 to slide outward in the second piston cylinder 690, which is 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. This causes the third hydraulic rod 150 to shorten by a distance equal to the sliding distance of the circular plate 640. This causes the screed 160 to rise and the circular plate 640 to slide by a distance. At this time, the distance between the screed 160 and the roadbed is equal to the rolling target distance plus the thickness change distance during rolling.

[0054] In addition, a check valve is also installed on the fifth hydraulic oil pipe 691, so that only the second piston cylinder 690 can draw hydraulic oil through the fifth hydraulic oil pipe 691 without backflow, thus 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 pavement in the sampling box 210 can enter the gap after being rolled, so that the pressure at the edge of the asphalt pavement is not too high when it is squeezed, simulating the state where the edge of the asphalt pavement is not squeezed during actual rolling. The through hole 620 is set through the pressure block 600 and the pressure transmission block 610. The circular plate 640 is connected to the top wall of the through hole 620. When the asphalt pavement 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 the subsequent accurate transmission.

[0056] A method for laying a highway base course, using a highway base course laying device, includes the following steps:

[0057] Adjust the distance between the screed 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 160. Change the volume of the sampling box 210 to match the amount of material that can be contained for the target compaction thickness.

[0058] The electric push rod 200 is extended to push the sampling box 210 to the lower part of the feeding cylinder 340. The first motor 300 is controlled to run so that the material in the receiving hopper 110 is transported into the sampling box 210. After the sampling box 210 is full, the first motor 300 is stopped. Then 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 required temperature, control the electromagnetic three-way valve 652 to connect the through hole 620 with the discharge pipe 651, control the second motor 500 to run, and drive the rotating rod 510 to rotate the receiving ring 560 through friction, causing the mechanical three-way valve 460 to run, thereby allowing the second hydraulic rod 411 to retract freely. The pressure block 600 moves down into the sampling box 210 under gravity, and the cam 520 drives the rectangular block 540 to slide back and forth in the box body 530, causing the first hydraulic rod 240 to extend and retract back and forth, applying vibration to the material in the sampling box 210.

[0060] After the second motor 500 stops running and the torsion spring 590 returns to its original position, 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.

[0061] When the through hole 620 is connected to the first piston cylinder 660, the circular plate 640 is pushed and slid by the measuring rod 220 by a distance equal to the height change of the material before and after compaction. 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 distance by the same amount 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] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A highway base course paving device, comprising a paver (100), wherein the paver (100) is provided with a material receiving hopper (110), characterized in that: A sampling box (210) is provided on the paver (100) near the material receiving hopper (110). A lifting plate (230) is slidably connected to the bottom of the sampling box (210). A measuring rod (220) is fixedly connected to the middle of the sampling box (210). A hole that mates with the measuring rod (220) is opened in the middle of the lifting plate (230). A pressure block (600) is vertically slidably connected to the upper part of the sampling box (210). The pressure block (600) has a through hole (620) in the middle that cooperates with the measuring rod (220). 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). 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 change in height of the material from before compaction to after compaction. An electric push rod (200) is hinged to the paver (100), and 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) through a rotating shaft. The paver (100) has a groove that cooperates with the sampling box (210). The paver (100) has a support (320) fixedly connected to the side of the hopper (110). A material collection cylinder (330) is fixedly connected to the support (320). A discharge cylinder (340) is connected to the side wall of the material collection cylinder (330). A first motor (300) is fixedly connected to the end of the material collection cylinder (330). A screw rod (310) is rotatably connected inside the material collection cylinder (330). The screw rod (310) is connected to the output end of the first motor (300). When the electric push rod (200) extends, it can push the sampling box (210) out of the groove. Thus, the port of the sampling box (210) is located below the discharge port of the discharge cylinder (340). After asphalt paving material is added to the hopper (110), the material collection cylinder (330) is in the state of being inserted into the asphalt paving material.

2. The highway base course paving device according to claim 1, 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), the transmission plate (232) and the lifting plate (230) are fixedly connected to a transmission rod (231), the hydraulic oil tank (400) and the first hydraulic rod (240) are connected to a first hydraulic oil pipe (450), and the first hydraulic oil pipe (450) is connected to a first hydraulic oil pump (440).

3. The highway base course paving device according to claim 2, characterized in that: The first hydraulic oil pipe (450) is connected to a box (530). A rectangular block (540) is slidably connected inside the box (530) by a first spring (550). When the rectangular block (540) slides back and forth in the box (530), the first hydraulic rod (240) can reciprocate and extend.

4. The highway base course paving device according to claim 3, characterized in that: A second motor (500) is fixedly connected to the paver (100), and 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 the side wall of the cam (520) is in contact with the rectangular block (540).

5. The highway base course paving device according to claim 4, 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 storage ring (560) is rotatably connected to the rotating rod (510). A pull rope (570) is connected between the storage ring (560) and the valve stem (580). After the storage ring (560) stores 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), thereby the second hydraulic rod (411) can extend and retract freely, and the rotating rod (510) can rotate relative to the storage ring (560).

6. The highway base course paving device according to claim 5, characterized in that: The paver (100) is connected to a paving module (140) at its tail. The paving module (140) includes a screed (160) and a third hydraulic rod (150) for adjusting the height of the screed (160). A fourth hydraulic oil pipe (151) is connected between the third hydraulic rod (150) and the hydraulic oil tank (400).

7. The highway base course paving device according to claim 6, characterized in that: A pressure transmission pipe (650) is connected to the through hole (620), and a discharge pipe (651) is connected to the pressure transmission pipe (650). 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 inside the first piston cylinder (660). A first piston rod (662) is fixedly connected to the piston plate (661). An mounting plate (670) is fixedly connected to the end of the first piston rod (662). A second piston rod (680) is fixedly connected to the mounting plate (670). The second piston rod (680) is slidably connected inside the second piston cylinder (690). 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).

8. A method for laying a highway base course, using the highway base course laying device as described in claim 7, characterized in that, Includes the following steps: Adjust the distance between the screed (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 (160), and change the volume of the sampling box (210) to match the amount of material that can be contained for the target compaction thickness. The electric push rod (200) is extended to push the sampling box (210) to the lower part of the feeding cylinder (340). The first motor (300) is controlled to run, so that the material in the receiving hopper (110) is transported into the sampling box (210). After the sampling box (210) is full, the first motor (300) is stopped. Then the electric push rod (200) is controlled to shorten so that the sampling box (210) is reset. To heat the sampling box (210) to the required temperature, control the electromagnetic three-way valve (652) so that the through hole (620) is connected to the discharge pipe (651). Control the second motor (500) to run, and the rotating rod (510) drives the receiving ring (560) to rotate through friction, so that the mechanical three-way valve (460) runs, thereby the second hydraulic rod (411) retracts freely, and the pressure block (600) moves down 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 extends, applying vibration to the material in the sampling box (210). After the second motor (500) stops running and the torsion spring (590) returns to its original position, 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 circular plate (640) is pushed and slid by the measuring rod (220) by a distance equal to the height change of the material before and after compaction. The piston plate (661) slides by a distance equal to that of the circular plate (640), thereby driving the third hydraulic rod (150) through the second piston cylinder (690) to shorten the distance by the same amount, 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.

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