A road roller for highway construction and its rolling method

Abstract

The application relates to the technical field of highway construction, in particular to a road roller for highway construction and a road rolling method thereof. The road roller comprises a front roller and a rear roller which are arranged in front and back, and the two ends of the front roller and the rear roller are respectively provided with roller arm assemblies. The front roller and the rear roller are supported by the roller arm assemblies. The road roller further comprises a main body which is fixedly installed with the roller arm assemblies and controls the driving of the front roller and the rear roller. When the front roller is used for rolling, the front roller is used to determine whether there is a protruding hard object according to the fluctuation track of the front roller. The rear roller is used to increase the pressing force when the rear roller moves to the protruding hard object, so that the protruding hard object is pressed and flattened.

Description

Technical Field

[0001] This invention relates to the field of highway construction technology, specifically to a road rolling device and its rolling method for highway construction. Background Technology

[0002] In highway construction, road rollers are indispensable. They pre-compact and level the road surface to facilitate subsequent asphalt paving and other construction work. Road rollers use vibrators to generate high-frequency vibrations, which are transmitted to the compaction rollers. This causes the rollers to vibrate against the ground, utilizing the principle of alternating shear strain in soil mechanics. This reduces the porosity between soil particles, rearranging the particles of the soil and other basic materials, thereby increasing the density of the roadbed and pavement. However, in actual construction, the presence of protruding hard objects such as rocks on the ground can be problematic. Traditional road rollers, due to weight limitations, may not be able to apply sufficient downward pressure to large protruding objects, requiring multiple roller passes or manual removal, thus affecting construction efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a road rolling device and a road rolling method for highway construction, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a road roller for highway construction, comprising a front roller and a rear roller arranged front and rear, with roller support arm assemblies respectively provided at both ends of the front roller and the rear roller, the roller support arm assemblies providing rolling support for the front roller and the rear roller, and a main body, which controls the movement of the front roller and the rear roller by being fixedly installed with the roller support arm assemblies; trajectory sensor modules are symmetrically arranged on the roller support arm assemblies at both ends of the front roller, the trajectory sensor modules monitoring the undulating trajectory of the front roller;

[0005] The rear pressure roller is provided with a fixed sliding shaft inside. The two ends of the fixed sliding shaft are fixed to the pressure roller support arm assembly. An bias adjustment sleeve is slidably provided on the outside of the fixed sliding shaft. An axial drive assembly and an instantaneous pressurization assembly are provided on the bias adjustment sleeve.

[0006] When the trajectory sensor module detects that the front pressure roller produces an undulating trajectory that conforms to the set parameters, the axial drive assembly adjusts the position of the bias adjustment sleeve according to the height difference of the undulating trajectory of the trajectory sensor module at both ends of the front pressure roller, so that the bias adjustment sleeve is closer to the side with higher undulating trajectory. Then, after the rear pressure roller moves to the undulating position of the front pressure roller, the instantaneous pressurization assembly increases the downward pressure of the rear pressure roller.

[0007] The axial drive assembly includes a sidewall hydraulic cylinder and an intermediate piston. The sidewall hydraulic cylinder is fixedly installed with the bias adjustment sleeve. The intermediate piston is located inside the sidewall hydraulic cylinder and is in sealed contact with the inner wall surface of the sidewall hydraulic cylinder. Both ends of the intermediate piston are provided with connecting cylinder shafts, which are fixed on the pressure roller support arm assembly. The sidewall hydraulic cylinder is externally connected to a hydraulic control nozzle. By changing the hydraulic pressure on both sides of the intermediate piston through the hydraulic control nozzle, the bias adjustment sleeve is axially driven.

[0008] The instantaneous pressurization assembly includes a counterweight and an explosive cylinder. The explosive cylinder is fixedly mounted on a bias adjustment sleeve. The counterweight is located directly above the bias adjustment sleeve. An impact piston is provided inside the explosive cylinder. An impact shaft is fixedly connected between the impact piston and the counterweight.

[0009] A limiting plate is fixedly installed on the counterweight block, and a limiting shaft is fixedly installed on the bias adjustment sleeve. The limiting shaft passes through the limiting plate to limit the movement of the counterweight block relative to the bias adjustment sleeve.

[0010] The explosion cylinder is equipped with an electric spark device inside, and a fuel nozzle is embedded in the side wall of the explosion cylinder. Atomized fuel can be injected into the explosion cylinder through the fuel nozzle. The electric spark device ignites and drives the impact piston to move, causing the counterweight to move upward relative to the bias adjustment sleeve.

[0011] Therefore, the explosion cylinder is also equipped with a normally closed ventilation assembly, which keeps the inside of the explosion cylinder in a normally closed state. The explosion cylinder is only connected to the outside world when there is positive pressure gas input.

[0012] The normally closed ventilation assembly includes a bottom circular cavity, an intake plug, an exhaust plug, and a separator plug. The bottom circular cavity is located in the bottom wall of the explosion cylinder. The intake plug, exhaust plug, and separator plug are all located inside the bottom circular cavity and are in sealed contact with the inner wall surface of the bottom circular cavity.

[0013] The intake plug, exhaust plug, and separator plug are fixedly connected to each other by a shaft, and the separator plug is located between the intake plug and the exhaust plug.

[0014] One end of the exhaust plug is provided with a reset spring. The bottom of the explosion cylinder is provided with an exhaust through groove that extends outward. The exhaust through groove communicates with the outside atmosphere through the bottom circular cavity. The bottom of the explosion cylinder is provided with an air inlet groove that communicates with the bottom circular cavity. The end of the bottom circular cavity is provided with an air inlet passage.

[0015] Under the force of the return spring, the exhaust plug is positioned in the corresponding position of the exhaust through groove, thus sealing the exhaust through groove transversely; the intake plug is positioned in the corresponding position of the intake groove, thus sealing the intake groove; when positive pressure gas is input into the intake chamber, the gas pressure pushes the intake plug to move axially, causing the return spring to be compressed. At this time, the intake chamber is connected to the interior of the explosion cylinder through the intake groove, and the exhaust through groove is connected through the gap between the exhaust plug and the separator plug.

[0016] An energy conversion component is also provided between the counterweight and the bias adjustment sleeve, which can convert the gravitational potential energy of the counterweight into other forms of energy.

[0017] The energy conversion assembly includes an energy conversion cylinder and a conversion piston. The energy conversion cylinder is fixedly installed with a bias adjustment sleeve. The conversion piston is located inside the energy conversion cylinder and is in sealed contact with the inner wall surface of the energy conversion cylinder. A connecting pressure arm is fixedly installed on the conversion piston and is fixedly installed with a counterweight.

[0018] The bottom of the energy conversion cylinder has a bottom air hole, and a one-way cover plate is provided on the bottom air hole. A spring sheet structure is provided below the one-way cover plate. The spring sheet structure applies a downward elastic force to the one-way cover plate, so that the one-way cover plate has a downward movement tendency, thereby making the bottom air hole closed in one direction by the one-way cover plate.

[0019] An electric lifter is fixedly installed directly below the energy conversion cylinder. The electric lifter is equipped with a retractable lifting push shaft. By controlling the lifting push shaft to extend through the electric lifter, the one-way cover can be opened so that the bottom air hole is in a normally open state.

[0020] A road rolling method, which uses a road construction rolling device, includes the following steps:

[0021] Step 1: Monitor the undulating trajectory of the front pressure roller using a trajectory sensor module;

[0022] Step 2: After monitoring the undulating trajectory caused by the front pressure roller pressing on the protruding hard object, determine whether the rear pressure roller has traveled onto the protruding hard object based on the wheelbase between the front and rear pressure rollers and the travel speed.

[0023] Step 3: The instantaneous pressure component increases the downward pressure of the rear pressure roller, which is used to press down on the protruding hard object.

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

[0025] 1. The road rolling device for highway construction of the present invention can determine the presence of protruding hard objects by using the undulating trajectory of the front roller while rolling the road. With the cooperation of the rear roller and the instantaneous pressing component, the downward pressure is greatly increased when the rear roller moves to the protruding hard object, which is then pressed down and flattened in a targeted manner. Compared with the road rolling device of the traditional technology, it can flatten protruding hard objects more effectively. Moreover, when the protruding hard objects are concentrated on one side, the height difference of the undulating trajectory can be used to determine which side the protruding hard objects are biased towards. The axial drive component can axially adjust the bias adjustment sleeve so that the bias adjustment sleeve is closer to the side where the protruding hard objects are concentrated, and the instantaneous downward pressure generated by the instantaneous pressing component is released more concentratedly on the protruding hard objects, thereby improving the flattening performance.

[0026] 2. The instantaneous pressurization component of this invention generates a reaction force by pushing the counterweight block with an explosion, which instantly and significantly increases the downward pressure of the rear pressure roller. Without significantly increasing the overall weight of the road rolling device, it can achieve an extremely high peak downward pressure, which can be used to flatten some protruding hard objects such as rocks.

[0027] 3. The present invention, through the normally closed ventilation component, can connect the explosion cylinder to the outside world to achieve air intake and exhaust during ventilation, while maintaining a normally closed state during explosion drive. It uses the air pressure during ventilation to drive the opening and closing control of the air intake slot and the exhaust through slot. At the same time, the explosion pressure will not act on the normally closed ventilation component to produce impact. The structure is simple and stable, and improves durability while achieving stable ventilation.

[0028] 4. This invention, through its energy conversion component, can convert part of the gravitational potential energy of the counterweight after it is pushed up into the internal energy of the gas in the energy conversion cylinder. This reduces the increase in downward pressure on the rear pressure roller when the counterweight returns to its original position. Since the counterweight has typically passed over a protruding hard object at this point, the impact of its downward movement can cause a certain increase in the downward pressure on the rear pressure roller, potentially leaving a roller-shaped groove on the ground and affecting flatness. Furthermore, the energy conversion component can be controlled to open and close, eliminating its impact when not needed. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a front view of the overall structure of the present invention.

[0031] Figure 3 This is a three-dimensional half-sectional view of the overall structure of the present invention.

[0032] Figure 4 This is a partial front view of the three-dimensional half-section of the present invention.

[0033] Figure 5This is a three-dimensional half-section view of the rear pressure roller.

[0034] Figure 6 This is a schematic diagram of the components at the bias adjustment sleeve.

[0035] Figure 7 This is a three-dimensional half-section view of the cylinder body where the explosion occurred.

[0036] Figure 8 This is a partial front view of the three-dimensional half-section of the exploded cylinder.

[0037] Figure 9 This is a partial front view of the three-dimensional half-section of the energy conversion cylinder.

[0038] In the diagram: 1. Front pressure roller; 2. Rear pressure roller; 3. Pressure roller support arm assembly; 4. Main body; 5. Track sensor module; 6. Fixed sliding shaft; 7. Bias adjustment sleeve; 701. Side wall hydraulic cylinder; 702. Intermediate piston; 703. Connecting cylinder shaft; 704. Hydraulic control nozzle; 8. Counterweight; 801. Explosion cylinder body; 802. Impact piston; 803. Impact shaft; 804. Limiting horizontal plate; 805. Limiting shaft; 806. EDM component; 807. Fuel nozzle; 808. 809. Bottom circular cavity; 810. Intake piston; 811. Exhaust piston; 812. Separator; 813. Return spring; 814. Exhaust through groove; 815. Intake groove; 9. Energy conversion cylinder; 901. Conversion piston; 902. Connecting pressure arm; 903. Bottom air hole; 904. One-way cover plate; 905. Spring structure; 906. Electric lifter; 907. Lifting push shaft; 101. Hydraulic motor; 102. Eccentric vibrating shaft; 103. Eccentric block. Detailed Implementation

[0039] 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.

[0040] Please see Figures 1 to 9 This invention provides a technical solution: a road roller device for highway construction, comprising a front roller 1 and a rear roller 2 arranged front and rear, both the front roller 1 and the rear roller 2 being cylindrical steel cylinders. Roller support arm assemblies 3 are respectively provided at both ends of the front roller 1 and the rear roller 2, providing rolling support for the front roller 1 and the rear roller 2. Figure 3 and Figure 5As shown, eccentric vibration components are provided in both the front pressure roller 1 and the rear pressure roller 2, which cause the front pressure roller 1 and the rear pressure roller 2 to vibrate during the pressing process.

[0041] The eccentric vibration assembly includes a hydraulic motor 101, an eccentric vibration shaft 102, and an eccentric block 103. The hydraulic motor 101 is fixedly installed in the pressure roller support arm assembly 3. The eccentric vibration shaft 102 is located at the axial center of the front pressure roller 1 and the rear pressure roller 2, respectively. The eccentric vibration shaft 102 is driven to rotate by the hydraulic motor 101. The eccentric block 103 is fixedly installed on the eccentric vibration shaft 102 by a pin. The rotation of the eccentric vibration shaft 102 generates impact vibration.

[0042] It also includes the main body 4, which is the main part of the road roller in the prior art, including the engine system, the operator's cab, etc., which will not be described in detail in this application. The main body 4 controls the travel of the front roller 1 and the rear roller 2 by being fixedly installed with the roller support arm assembly 3. Trajectory sensor modules 5 are symmetrically arranged on the roller support arm assembly 3 at both ends of the front roller 1. The trajectory sensor modules 5 monitor the undulating trajectory of the front roller 1. The trajectory sensor module 5 is composed of an accelerometer and a gyroscope. It calculates the vertical motion trajectory by measuring the linear acceleration and angular velocity of the front roller 1 in the vertical direction and combining the algorithm.

[0043] The rear pressure roller 2 has a fixed sliding shaft 6 inside. Both ends of the fixed sliding shaft 6 are welded and fixed to the pressure roller support arm assembly 3. An offset adjusting sleeve 7 is slidably provided on the outside of the fixed sliding shaft 6. Figure 5 and Figure 6 As shown, the bias adjustment sleeve 7 is in the shape of a cylindrical tube, and a cylinder is integrally welded on its inner wall. The fixed sliding shaft 6 passes through the cylinder, so that the bias adjustment sleeve 7 can slide along the axial direction of the fixed sliding shaft 6. The bias adjustment sleeve 7 and the fixed sliding shaft 6 cooperate to bear the impact force onto the rear pressure roller 2.

[0044] The bias adjustment sleeve 7 is equipped with an axial drive assembly and an instantaneous pressurization assembly. When the trajectory sensor module 5 detects that the front pressure roller 1 produces a set undulating trajectory, the axial drive assembly adjusts the position of the bias adjustment sleeve 7 according to the height difference of the undulating trajectory of the trajectory sensor module 5 at both ends of the front pressure roller 1, so that the bias adjustment sleeve 7 is closer to the side with higher undulating trajectory. Then, after the rear pressure roller 2 moves to the undulating position of the front pressure roller 1, the instantaneous pressurization assembly increases the downward pressure of the rear pressure roller 2.

[0045] The axial drive assembly includes a side wall hydraulic cylinder 701 and an intermediate piston 702. The side wall hydraulic cylinder 701 is welded and fixedly installed to the bias adjustment sleeve 7. The intermediate piston 702 is located inside the side wall hydraulic cylinder 701 and is in sealed contact with the inner wall surface of the side wall hydraulic cylinder 701. Both ends of the intermediate piston 702 are provided with connecting cylinder shafts 703, which are welded and fixed to the pressure roller support arm assembly 3. The side wall hydraulic cylinder 701 is externally connected to a hydraulic control nozzle 704. The hydraulic pressure on both sides of the intermediate piston 702 is changed by the hydraulic control nozzle 704 to axially drive the bias adjustment sleeve 7.

[0046] The instantaneous pressurization assembly includes a counterweight 8 and an explosion cylinder 801. The explosion cylinder 801 is welded and fixedly installed on the bias adjustment sleeve 7. The counterweight 8 is located directly above the bias adjustment sleeve 7. An impact piston 802 is provided inside the explosion cylinder 801. An impact shaft 803 is welded and fixedly connected between the impact piston 802 and the counterweight 8.

[0047] A limiting plate 804 is welded and fixed on the counterweight 8, and a limiting shaft 805 is welded and fixed on the bias adjustment sleeve 7. The limiting shaft 805 passes through the limiting plate 804 for limiting cooperation, so that the upward movement height of the counterweight 8 relative to the bias adjustment sleeve 7 is limited.

[0048] The explosion cylinder 801 is equipped with an electric spark element 806. When the electric spark element 806 is energized, it can generate an electric spark to ignite the atomized fuel. The side wall of the explosion cylinder 801 is embedded with a fuel nozzle 807, which can spray atomized fuel into the explosion cylinder 801. The electric spark element 806 ignites and drives the impact piston 802 to move, causing the counterweight 8 to move upward relative to the bias adjustment sleeve 7. Therefore, the explosion cylinder 801 is also equipped with a normally closed ventilation assembly, which keeps the interior of the explosion cylinder 801 in a normally closed state. The explosion cylinder 801 is connected to the outside only when there is positive pressure gas input.

[0049] The normally closed ventilation assembly includes a bottom circular cavity 808, an intake plug 809, an exhaust plug 810, and a partition plug 811. The bottom circular cavity 808 is formed in the bottom wall of the explosion cylinder 801. The intake plug 809, the exhaust plug 810, and the partition plug 811 are all disposed inside the bottom circular cavity 808 and are in sealed contact with the inner wall surface of the bottom circular cavity 808.

[0050] The intake plunger 809, the exhaust plunger 810 and the separator plug 811 are fixedly connected to each other by welding the shaft, and the separator plug 811 is located between the intake plunger 809 and the exhaust plunger 810.

[0051] One end of the exhaust plug 810 is provided with a return spring 812. The bottom of the explosion cylinder 801 is provided with an exhaust through groove 813 that extends outward. The exhaust through groove 813 communicates with the outside atmosphere through the bottom circular cavity 808. The bottom of the explosion cylinder 801 is provided with an air inlet groove 814 that communicates with the bottom circular cavity 808. The end of the bottom circular cavity 808 is provided with an air inlet passage 815.

[0052] Under the elastic force of the return spring 812, the exhaust plug 810 is positioned at the corresponding position of the exhaust through groove 813, thus sealing the exhaust through groove 813 transversely; the intake plug 809 is positioned at the corresponding position of the intake groove 814, thus sealing the intake groove 814; when positive pressure gas is input into the intake chamber 815, the gas pressure pushes the intake plug 809 to move axially, causing the return spring 812 to be compressed. At this time, the intake chamber 815 is connected to the interior of the explosion cylinder 801 through the intake groove 814, and the exhaust through groove 813 is in a connected state through the gap between the exhaust plug 810 and the partition plug 811.

[0053] An energy conversion component is also provided between the counterweight 8 and the bias adjustment sleeve 7. This component can convert the gravitational potential energy of the counterweight 8 into other forms of energy. The energy conversion component includes an energy conversion cylinder 9 and a conversion piston 901. The energy conversion cylinder 9 is welded and fixedly installed to the bias adjustment sleeve 7. The conversion piston 901 is located inside the energy conversion cylinder 9 and is in sealed contact with the inner wall surface of the energy conversion cylinder 9. A connecting pressure arm 902 is fixedly installed on the conversion piston 901 and is welded and fixedly installed to the counterweight 8.

[0054] The bottom of the energy conversion cylinder 9 has a bottom vent 903, and a one-way cover 904 is installed on the bottom vent 903. A spring-loaded structure 905 is installed below the one-way cover 904. The spring-loaded structure 905 applies a downward elastic force to the one-way cover 904, causing the one-way cover 904 to have a downward movement tendency, thus unidirectionally closing the bottom vent 903. An electric lifter 906 is fixedly installed directly below the energy conversion cylinder 9. The lifter 906 is equipped with a telescopic lifting push shaft 907. The electric lifter 906 consists of a motor, a reduction gear set, and a rack. The reduction gear set amplifies the torque of the motor and drives the rack to move linearly. The rack is fixed to the lifting push shaft 907 with bolts, so that the lifting push shaft 907 can be telescopically controlled. By controlling the lifting push shaft 907 to lift and extend through the electric lifter 906, the one-way cover plate 904 can be opened so that the bottom air hole 903 is in the normally open state.

[0055] A road rolling method, which uses a road construction rolling device, includes the following steps:

[0056] Step 1: Monitor the undulating trajectory of the front pressure roller 1 using the trajectory sensor module 5;

[0057] Step 2: After monitoring the undulating trajectory of the front pressure roller 1 pressing against the protruding hard object, determine whether the rear pressure roller 2 has traveled onto the protruding hard object based on the wheelbase between the front pressure roller 1 and the rear pressure roller 2 and the travel speed.

[0058] Step 3: The instantaneous pressure component increases the downward pressure of the rear pressure roller 2, which is used to press down on the protruding hard object.

[0059] The present invention is as follows Figure 1 As shown, during the rolling process of the rolling device, when there are protruding hard objects and it is difficult to flatten them by the downward pressure of the rolling device itself, the front roller 1 will undulate up and down when it passes over the protruding hard objects. The trajectory of the front roller 1 undulating up and down is monitored by the trajectory sensor module 5.

[0060] Since there are two sets of trajectory sensor modules 5, located at both ends of the front pressure roller 1, when the protruding hard object is biased to one side, the undulating trajectory height on one side of the front pressure roller 1 will be higher than that on the other side. When the protruding hard object is located in the middle of the front pressure roller 1, the front pressure roller 1 will undulate up and down as a whole, with the undulation heights of the undulations at both ends being similar. Based on the above principle, the positional bias of the protruding hard object can be determined by the height difference of the undulation trajectories at both ends of the front pressure roller 1.

[0061] Hydraulic input is fed into the hydraulic control nozzle 704, which cooperates with the intermediate piston 702 to cause the side wall hydraulic cylinder 701 and the intermediate piston 702 to move relative to each other, thereby driving the bias adjustment sleeve 7 axially so that the bias adjustment sleeve 7 moves to the side to which the protruding hard object is biased. When the protruding hard object is in the center, the bias adjustment sleeve 7 remains in the middle position.

[0062] Based on the current travel speed of the road roller, and considering the wheelbase between the front roller 1 and the rear roller 2, the following judgment is made: when the rear roller 2 moves onto the protruding hard object, ... Figure 7 and Figure 8 As shown, the fuel nozzle 807 instantly sprays atomized fuel, which is ignited by the electric spark 806. The explosion pressure pushes the impact piston 802 upward, and the propulsion force generated by the explosion acts on the counterweight 8. Its reaction force is downward. The reaction force is transmitted through the bias adjustment sleeve 7, the fixed slide shaft 6 and the pressure roller support arm assembly 3 in sequence, which makes the downward pressure of the rear pressure roller 2 increase significantly in an instant, flattening the protruding hard object.

[0063] Oxygen-containing compressed air is then input through the intake chamber 815. During use, the intake chamber 815 is connected to an external compressed air pump. Compressed air enters through the intake chamber 815, pushing the intake piston 809 axially. At this time, the exhaust piston 810 and the separator plug 811 move synchronously to the left axis. Figure 8 As shown in the diagram. At this time, compressed air enters the interior of the explosion cylinder 801 through the intake slot 814, located in the area below the impact piston 802. Meanwhile, the explosion exhaust gas is discharged through the exhaust through slot 813, completing the gas exchange. After the intake chamber 815 stops supplying compressed gas, under the reset force of the reset spring 812, both the intake plug 809 and the exhaust plug 810 return to their original positions. Figure 8 In the state shown, the exhaust through slot 813 and the intake slot 814 are closed, waiting for the next cycle.

[0064] During the process from the explosion of the explosion cylinder 801 to the upward movement of the counterweight 8 and the significant increase in the downward pressure of the rear pressure roller 2 due to the reaction force, the counterweight 8 will move upward relative to the bias adjustment sleeve 7 due to the explosion. When the explosion pressure disappears, the counterweight 8 will inevitably move downward and reset, striking the explosion cylinder 801 and generating downward pressure. This pressure is transmitted through the bias adjustment sleeve 7 and the fixed sliding shaft 6, which will also cause the downward pressure of the rear pressure roller 2 to increase instantaneously. When necessary, the secondary increase in the downward pressure of the rear pressure roller 2 can be ignored. However, in some working conditions, since the displacement has already passed the protruding hard object, it is usually not necessary to increase the downward pressure of the rear pressure roller 2 again. In this case, it is easy to cause the flat road surface to be pressed into an arc groove again.

[0065] The present invention is as follows Figure 7 and Figure 9 As shown, when the lower pressure of the rear pressure roller 2 needs to be increased a second time, the lifting push shaft 907 is driven to extend by the electric lifter 906, so that the lifting push shaft 907 pushes open the one-way cover plate 904. At this time, the bottom of the energy conversion cylinder 9 is in the normally open state, and the up and down movement of the conversion piston 901 is unrestricted.

[0066] When the downward pressure of the rear pressure roller 2 is no longer needed to be increased, the lifting push shaft 907 does not extend to open the one-way cover 904; thus, when the counterweight 8 is pushed upward by the explosive driving force, the conversion piston 901 moves upward synchronously, allowing gas to be drawn into the energy conversion cylinder 9 through the bottom air hole 903. When the counterweight 8 moves downward to reset, the conversion piston 901 moves downward synchronously. At this time, due to the one-way sealing effect of the one-way cover 904, the conversion piston 901 will compress the gas in the energy conversion cylinder 9 to do work, thereby converting part of the gravitational potential energy of the counterweight 8 into the internal energy of the gas in the energy conversion cylinder 9. The gas in the energy conversion cylinder 9 heats up, thereby weakening the peak intensity of the downward pressure of the rear pressure roller 2 when it is increased again. After the counterweight 8 is stable, the lifting push shaft 907 opens the one-way cover 904 to exhaust the gas, so that the counterweight 8 is completely reset.

[0067] 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 road construction rolling device, comprising a front roller and a rear roller arranged in front and back, respectively, and a roller arm assembly arranged at both ends of the front roller and the rear roller, respectively, for rolling support of the front roller and the rear roller, and a main body for travel control of the front roller and the rear roller by fixed installation with the roller arm assembly, characterized in that: Corresponding to the front compression roller two ends, trajectory sensor modules are symmetrically arranged on the compression roller arm assemblies, and the undulating trajectory of the front compression roller is monitored through the trajectory sensor modules; The rear compression roller is internally provided with a fixed slide shaft, both ends of the fixed slide shaft are fixed on the compression roller arm assemblies, and an offset adjusting sleeve is slidably arranged outside the fixed slide shaft, an axial driving assembly and an instantaneous pressure assembly are arranged on the offset adjusting sleeve; When the trajectory sensor modules detect that the front compression roller generates an undulating trajectory that meets the setting, the axial driving assembly adjusts the position of the offset adjusting sleeve according to the height difference of the undulating trajectory of the trajectory sensor modules at both ends of the front compression roller, so that the offset adjusting sleeve is closer to the side with a higher undulating trajectory, and then, after the rear compression roller moves to the undulating position of the front compression roller, the instantaneous pressure assembly increases the downward pressure of the rear compression roller.

2. The road construction compacting device of claim 1, wherein: The axial driving assembly comprises a side wall hydraulic cylinder and an intermediate piston, the side wall hydraulic cylinder is fixedly installed with the offset adjusting sleeve, the intermediate piston is arranged inside the side wall hydraulic cylinder and in sealing contact with the inner wall surface of the side wall hydraulic cylinder, both ends of the intermediate piston are provided with connecting cylinder shafts, and the connecting cylinder shafts are fixed on the compression roller arm assemblies; the outside of the side wall hydraulic cylinder is communicatively provided with a hydraulic control nozzle, the hydraulic pressure on both sides of the intermediate piston is changed through the hydraulic control nozzle, so as to axially drive the offset adjusting sleeve.

3. The road construction compacting device of claim 1, wherein: The instantaneous pressure assembly comprises a counterweight and an explosion cylinder body, the explosion cylinder body is fixedly installed on the offset adjusting sleeve, the counterweight is directly above the offset adjusting sleeve, the explosion cylinder body is internally provided with an impact piston, and an impact shaft is fixedly connected between the impact piston and the counterweight.

4. The road construction compacting device of claim 3, wherein: A limiting transverse plate is fixedly arranged on the counterweight, a limiting shaft is fixedly arranged on the offset adjusting sleeve, the limiting shaft penetrates through the limiting transverse plate for limiting cooperation, and the upward movement height of the counterweight relative to the offset adjusting sleeve is limited.

5. The road construction compacting device of claim 3, wherein: The inside of the explosion cylinder body is provided with an electric spark piece, and a fuel nozzle is embeddedly installed on the side wall of the explosion cylinder body, the fuel nozzle can spray atomized fuel into the explosion cylinder body, the electric spark piece is used to detonate and drive the impact piston to move, so that the counterweight moves upward relative to the offset adjusting sleeve. Therefore, the explosion cylinder body is also provided with a normally closed gas exchange assembly, the explosion cylinder body is in a normally closed state, and the explosion cylinder body is only in communication with the outside when there is a positive pressure gas input.

6. A road construction compacting device according to claim 5, wherein: The normally closed gas exchange assembly comprises a bottom circular cavity, an air inlet plug column, an air outlet plug column and a separation plug portion, the bottom circular cavity is formed in the bottom wall of the explosion cylinder body, the air inlet plug column, the air outlet plug column and the separation plug portion are arranged inside the bottom circular cavity and in sealing contact with the inner wall surface of the bottom circular cavity.

7. A road construction compacting device according to claim 6, characterised in that: The air inlet plug column, the air outlet plug column and the separation plug portion are fixedly connected with each other through a shaft body, and the separation plug portion is between the air inlet plug column and the air outlet plug column.

8. The road construction compacting device of claim 6, wherein: One end of the air outlet plug column is provided with a return spring, the bottom of the explosion cylinder body is externally and continuously provided with an air outlet through groove, the air outlet through groove is in communication with the outside atmosphere through the bottom circular cavity, the bottom of the explosion cylinder body is provided with an air inlet groove, the air inlet groove is in communication with the bottom circular cavity, and the end of the bottom circular cavity is continuously provided with an air inlet cavity.

9. A road construction compacting device according to claim 8, characterised in that: Under the elastic force of the reset spring, the exhaust plug column is in the exhaust through groove corresponding position, the exhaust through groove transverse seal; the intake plug column is in the intake groove corresponding position, the intake groove is closed; when the positive pressure gas is input in the intake cavity road, the gas pressure pushes the intake plug column axial movement, so that the reset spring is compressed, at this time the intake cavity road through the intake groove and the inside of the explosion cylinder body is communicated, the exhaust through groove is in the communication state through the gap between the exhaust plug column and the partition plug part.

10. The road construction compacting device of claim 3, wherein: The energy conversion assembly is further arranged between the counterweight and the deflection adjusting sliding sleeve, and the gravitational potential energy of the counterweight can be converted into other forms of energy through the energy conversion assembly.

11. The road construction compacting device of claim 10, wherein: The energy conversion assembly comprises an energy conversion cylinder and a conversion piston, the energy conversion cylinder is fixedly installed with the deflection adjusting sliding sleeve, the conversion piston is arranged in the energy conversion cylinder and in sealing contact with the inner wall surface of the energy conversion cylinder, a connecting pressure arm is fixedly arranged on the conversion piston and fixedly installed with the counterweight.

12. The road construction compacting device of claim 11, wherein: A bottom air hole is formed in the bottom of the energy conversion cylinder, a one-way cover plate is arranged on the bottom air hole, a spring piece structure is arranged below the one-way cover plate, the one-way cover plate has a downward movement trend through the spring piece structure which exerts a downward elastic force on the one-way cover plate, so that the bottom air hole is one-way closed by the one-way cover plate. A motor lifter is fixedly arranged below the energy conversion cylinder, a lifting push shaft which can be telescopically moved is arranged on the motor lifter, the lifting push shaft is controlled to be lifted and extended out by the motor lifter, so that the one-way cover plate is pried open and the bottom air hole is in a normally open state.

13. A road construction method using the road construction device according to any one of claims 1 to 12, characterized by, The method comprises the following steps: Step one: monitor the undulating track of the front compression roller through the track sensor module; Step two: after monitoring the undulating track generated by the front compression roller pressing the protruding hard object, determine whether the rear compression roller travels onto the protruding hard object according to the axle distance between the front compression roller and the rear compression roller and the driving speed; Step three: increase the downward pressure of the rear compression roller through the instantaneous pressure increasing assembly to press the protruding hard object.

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