122 results about "Pavement milling" patented technology

The invention discloses an on-site construction method of a cold recycling asphalt pavement. The on-site construction method comprises the following process steps: digging out used materials of the asphalt pavement by a pavement milling and planing device; performing continuous circulating crushing and screening on the used materials of the asphalt pavement by a crushing and screening device; placing the crushed and screened used materials of the asphalt pavement into a finished product hopper, mixing emulsified asphalt with water in a proportion of 1: 1, blending with the used materials of the asphalt pavement in the finished product hopper, then adding a mixture of cement and ore powder to form an asphalt mixture; laying the asphalt mixture on a base layer of the pavement in a slow, uniform and continuous way, completing the compaction of a recycling asphalt mixture through three rolling stages, namely initial rolling, re-rolling and final rolling; and standing and curing the rolled base layer of the cold recycling asphalt mixture for 10-14 days. According to the method disclosed by the invention, the proportion of one-time cold recycling is high, the economic benefits are higher, the problem of secondary pollution is avoided, and the method is a green and environment-friendly preparation method.

PROBLEM: Efficiently generating digital terrain model (DTM) having high elevation surface accuracy and high point density, and suitable for controlling pavement milling machines during road repairs. SOLUTION: Combination of motorized levelling and Stop-Go mobile laser scanning system, including train of three vehicles, which are at standstill during measurements, and which move in unison in between measurements. Middle vehicle carries laser scanner, elevation sight, and GNSS receiver. Front and rear vehicle each carry levelling rod; front vehicle also carries GNSS receiver. During measurement cycle, laser scanner generates point cloud, while GNSS positions of middle and front vehicles and elevations at the resp. positions of front and rear vehicles are determined. After measurement cycle, vehicle train moves until rear vehicle halts at previous GNSS position of front vehicle, etc. When all measurement cycles are completed, collected data is integrated and transformed into a DTM.

The invention discloses a quick cutter change milling rotor used on a pavement milling machine, relating to an engineering machine. The quick cutter change milling rotor comprises a barrel, pedestals, a cutter sheath and a cutter head, wherein the lower part of each pedestal is a pyramid with large upper end and small lower end, the left side face and the right side face of the pyramid are manufactured into spiral faces, the left side faces and the right side faces of a plurality of adjacent pedestal are close to each other to form two groups of auger type spiral blade surface chains with opposite direction of turning, the spiral blade surfaces are flat and smooth and has small resistance, and waste materials are avoided from splashing and falling into troughs after milling. The cutter sheath and the pedestals are connected through conical degree to ensure concentricity and high strength, the cutting edge of the cutter head is maintained on the same spiral line to increase the flatness of the cut pavement, and the service life of the cutter head is prolonged. A threaded hole is arranged at the tail of the cutter sheath, the threaded hole fixes the cutter sheath on the pedestals through lock bolts and lock washers, and unsafe accidents caused by the dropping of the cutter sheath and cutter falling during use are avoided.

The invention discloses a construction technology of in situ thermal regeneration. The construction technology comprises the following steps that firstly pre-construction preparation is conducted; then pavement heating is conducted; pavement milling is conducted, and a regenerant and new asphalt are sprayed; reclaimed materials are remixed; paving of the reclaimed materials is conducted; rolling of the reclaimed materials is conducted; then a finished-product road section is detected; and finally traffic is opened. According to the construction technology of in situ thermal regeneration, one-time forming of a new pavement can be achieved, the use ratio of original pavement materials can reach to 100%, and waste is recycled and used; resources are saved, environmental pollution is reduced, and traffic is not closed in the operating process; the economic and social benefits are remarkable, marshalling type combined operation is conducted, the technology of heating, drying and stirring and mixing in the whole process ensures the quality of new and old regenerated mixtures, automated line production of pavement construction is achieved, the maintenance effect is good, and the road condition is good after maintenance is conducted.

The invention provides an in-place heat regeneration integrated machine for bituminous pavements and a control method, wherein the in-place heat regeneration integrated machine for bituminous pavements integrates the functions of pavement milling-planing, bituminous mixture heating, remixing and the like. The regeneration integrated machine comprises a chassis, a milling-planing device, a conveyor, a conveyor heating device, an agitating pan, agitating pan heating devices, and a control system, wherein the conveyor is located behind the milling-planing device, the conveyor heating device is located above the conveyor, the agitating pan heating device is arranged at the top of the agitating pan, and the control system is used for controlling the travelling speed of the chassis, the heating temperature, the mixture metering and the agitating time of the agitating pan. The control method comprises the following steps: starting to accumulate travelling pulses, and if a required travelling distance reaches, switching a material distribution board to the other side; if the material distribution board is overturned, opening an agitating cylinder on the other side, discharging for a period of time, and waiting for the next switching of the material distribution board; and repeating the steps until the machine stops working.

The invention provides a control system of a milling machine. The control system is used on the milling machine and comprises a controller and detection devices, wherein the controller is electrically connected with the detection devices; the controller can be used for controlling the running speed of the milling machine; the pavement milling width of the milling machine can be input or selected in the controller; the detection devices comprise a first detection device and a second detection device, wherein the first detection device is used for detecting the milling depth of the milling machine, and the second detection device is used for detecting the running speed of the milling machine; the controller can control the material delivery speed of the milling machine according to the milling material quantity of the milling machine. The control system with the structure can accurately calculate the milling material capacity of the milling machine in real time and can adjust the material delivery speed of the milling machine according to the milling material quantity and enable the delivery speed to be higher when the milling material quantity is larger. On the other side, the invention also provides the milling machine comprising the control system of the milling machine.

The invention belongs to the field of pavement engineering machinery, and relates to a self-feedback floating scraping system of a pavement milling machine. The self-feedback floating scraping system comprises a scraping plate and a control system, wherein the scraping plate is arranged on the lower part of a turning body of the pavement milling machine and can lift by being driven by a scraping plate oil cylinder; the control system is used for controlling the lifting of the scraping plate, and comprises a pressure sensor which is arranged on the scraping plate and can detect ground pressure of the scraping plate; the detection signal output end of the pressure sensor is connected to a CPU (Central Processing Unit) capable of processing detection data; and the control instruction output end of the CPU is connected to a scraping plate valve group capable of controlling the action of the scraping plate oil cylinder. The self-feedback floating scraping system disclosed by the invention can keep the appropriate ground pressure all the time for milling in a pulling and scraping operation process by detecting and regulating the ground pressure of the scraping plate in real time, thereby being suitable for the change of pavements with different terrains and improving the construction effect and efficiency.

The invention provides a pavement milling machine and a landing leg swinging mechanism thereof. The landing leg swinging mechanism comprises a double-rocker mechanism consisting of a machine frame, swinging rods, a rotatable sleeve rod, and fixing and connecting rods, wherein the swinging rods and the rotatable sleeve rod are rockers; and the fixing and connecting rods are connecting rods, are rotatably connected with the rotatable sleeve rod by taking landing legs of the pavement milling machine as hinge shafts, and are fixedly connected with the landing legs and are parallel to each other before and after swinging of the double-rocker mechanism. According to the landing leg swinging mechanism, the double-rocker mechanism is adopted, and the landing legs are used as the hinge shafts of the rotatable sleeve rod and the fixing and connecting rods; and due to the adoption of the structure, the fixing and connecting rods are fixedly connected with the landing legs and keep parallel to each before and after swinging, so that the direction of the forward motion of a tire or a tack is not changed, and under the condition that the two kinds of rockers are small in movement range, the landing legs positioned at the hinge points are large in displacement range; and the landing leg swinging mechanism is compact in structure and small in occupied space.

The invention discloses an anterior recycling pavement milling machine which comprises an engine, a frame, a front wobble wheel, a cab, a single-grade belt conveyer, a working device, a front wheel, a hydraulic oil tank, a water tank, a back steering wheel and a diesel oil tank. The engine is arranged on the frame. Two ends of the frame are supported on the back steering wheel, the front wheel and the front wobble wheel. The hydraulic oil tank and the diesel oil tank are arranged at one side of a machine body. The water tank is arranged under the machine body. The working device is arranged between the front wheel and the front wobble wheel of the machine body. The single-grade belt conveyer is arranged at the front of the working device. The invention changes the back discharge and recycling type of the prior milling machine into anterior discharge and recycling type, a milling tool mills asphalt concrete surface layer adversely to ensure that milled waste material is thrown to a belt of the single-grade belt conveyer from a front discharge opening directly, thereby reducing the material-throwing power loss and the abrasion of the tool. The forward direction of the anterior recycling pavement milling machine is the same as the waste material discharge direction, so that a transporter is not required to back and follow to receive the material, and the work efficiency is improved.

The invention relates to the technical field of pavement maintenance equipment and discloses a pavement milling machine with a cleaning function. The pavement milling machine comprises a body and a rack, wherein a milling component extending to the bottom of the rack is fixedly inserted into the left side of the top of the rack; a rolling brush is rotationally connected to the bottom of the rack and positioned on the right side of the milling component; a motor connected with the rolling brush is fixedly connected to the top of the rack; and a coaming is fixedly connected to the bottom of therack and positioned on the outer side of the milling component and the rolling brush. According to the pavement milling machine with the cleaning function, chippings and dust produced by milling are crowded around by the coaming and a floating plate, the chippings are swept onto a transfer component by the rolling brush and then transferred into a waste tank, air containing lots of dust is dissociated by an exhaust fan, and the dust is filtered in a dust collection box by a filtering net. According to the manner, the pavement milling machine is capable of cleaning and collecting the chippingsand dust during operation, the environment and body health of operators can be protected, the working efficiency is improved, and the machine is convenient to use.

The invention provides a milling machine capable of adjusting the milling depth. The milling machine comprises a milling machine frame, a milling rotor, an engine, a milling depth control device, a milling depth adjusting device, a walking motor, a front rolling wheel, a rear rolling wheel, a tail door, a recycling belt device, a connecting rod and an oil cylinder. Through the milling depth control device and the milling depth adjusting device of the pavement milling machine, the milling depth of the pavement can be accurately adjusted to achieve the ideal milling effect.

The present invention discloses a high-modulus asphalt mixture based on an old pavement milling material, and a preparation method thereof, and belongs to the technical field of road engineering, wherein the high-modulus asphalt mixture comprises the following raw materials by mass: 35-75% of the lean oil coarse component (particle size of greater than 4.75 mm) in an old pavement milling material,25-65% of the rich oil fine component (particle size of less than 4.75 mm) in an old pavement milling material, 0.1-2% of a modification regeneration agent, 0-20% of new aggregate, 0-3% of ore powder, and 0-3% of new asphalt. According to the present invention, the high-modulus asphalt mixture prepared through the method has advantages of high modulus, excellent mechanical property, good anti-rutting ability, good durability and good water stability; the 100% recycling of the lean oil coarse aggregate in the old asphalt pavement milling material and the 100% resource utilization of the rich oil fine aggregate are achieved, and the potential value of the old asphalt pavement milling material is completely provided; and the super-long service life, the safe driving and the economy of the pavement are achieved.

The invention relates to a traveling control system, in particular to a traveling control system which is particularly applicable to a small-sized pavement milling machine, and belongs to the field of an electric-hydraulic control system of a traveling machine. The small-sized pavement milling machine traveling control system comprises a traveling pump, a diverting valve, a control valve blank, a high-speed motor and two low-speed motors, wherein the traveling pump conveys the hydraulic oil respectively to the low-speed motors and the high-speed motor in parallel connection through the diverting valve, and then the hydraulic oil is returned to the traveling pump to form a closed loop. The small-sized pavement milling machine traveling control system is characterized in that by adopting the parallel connection way of the high-speed motor and the two low-speed motors, a rear wheel does not need to be connected with a reducer, so that the axial size of the rear wheel is reduced, the entire design is optimized, the swinging of the rear wheel is not influenced, and the rear wheel is more applicable to the small-sized pavement milling machine; meanwhile, the sufficient driving force also can be guaranteed, and the milling requirement of the milling machine can be met.

The invention provides a blade for a bituminous pavement milling machine and a grooving machine. A tool bit is arranged at the front end of a cutter body; 45-degree chamfers are manufactured at the rear end of the root of the tool bit and on both sides of the front end face of the tool bit; the tool bit is that: an integrally connected sawtooth-shaped cutting edge is arranged in the radial direction of the front cutting face of the tool bit; and a cutting edge division groove is formed on the central line of the front cutting face of the tool bit. By using the blade, the cutting edge of the tool bit is very sharp, so the area of the cutting edge is increased and a cutting resistance is reduced; in the process of milling or grooving, even the tip of the first helical-form cutting edge at the head is damaged, the other helical-form cutting edges and straight-tooth cutting edges still have strong cutting forces; and the middle cutting edge division groove allows the cut-down bituminous concrete to be easily drained. The blade for the bituminous pavement milling machine and the grooving machine has a rational design and high working efficiency, can be used for milling and grooving, and can be used on the milling machine.

The invention discloses a cold-recycling asphalt mixture, which is composed of the following ingredients (by weight): 75-95 parts of a waste asphalt mixture, 1-5 parts of gutter oil, 2-4 parts of diesel oil, 0.3-0.6 part of slaked lime, 0.5-1 part of lignin fiber, 2-3 parts of aluminium chloride, 3-5 parts of fly ash, 0.5-1 part of benzophenone, 0.2-0.3 part of p-toluenesulfonic acid and 0.3-0.6 part of aniline. By the use of a formula-improved cold-recycling mixture, a cold-recycling mixture having improved performance is obtained. A pavement milling material of the in-place cold-recycling mixture has high recycling rate and good construction performance. High-temperature stability and water stability of the in-place cold-recycling pavement are obviously enhanced. The technological flow is simplified. There is no need to consume fuel, and no exhaust gas is discharged. Thus, real cold-recycling of asphalt is realized, and mixture is beneficial to ''energy conservation and emission reduction'' and environmental protection.

The invention relates to a rear-mounted road milling machine with a milling roller (20), which is arranged in a downwardly open milling roller housing (16), between the front part (28) of the milling roller housing (16) and The opening (B) between the road surfaces (18) facing the direction of travel (a) is closed by a height-adjustable closing device (26), characterized in that the height-adjustable closing device (26) is wound in the direction of travel (a) The shaft (C) in front of the milling roller (20) oscillates. Oscillation of the closing device (26) around an axis (C) arranged in front of the milling roller (20) in the direction of travel enables the closing device (26) to slide on the road surface (18) and thereby adapt to unevenness of the road surface by oscillating back and forth Degrees such as fluctuations in the road surface or uneven distribution due to milling tracks. Thereby, interruption or cessation of propulsion due to jamming is eliminated. Furthermore, its closure (26) ensures protection against projecting milling objects forward.

The invention provides a hydraulic system for controlling a tail gate of a pavement milling machine. The hydraulic system comprises an overflow valve, an electromagnetic overflow valve, a first two-position four-way electromagnetic reversing valve, a second two-position four-way electromagnetic reversing valve, a first normally-closed two-position two-way electromagnetic reversing ball valve, a second normally-closed two-position two-way electromagnetic reversing ball valve, a three-position four-way electromagnetic reversing valve, a conveying motor of a belt conveyor, a fixed pressure reducing valve and a tail gate lifting oil cylinder. The hydraulic system has the advantages that the technical scheme is adopted, so that the operating quality of the milling machine is improved, the energy consumption is reduced, the performance is reliable, the structure is simple, the cost is cheap, lifting, locking, floating and back pressure functions of the tail gate can be achieved, the whole weight of the tail gate and a conveying device is grounded, pressure oil is fed into a rod cavity of the tail gate lifting oil cylinder to reduce the ground pressing of the tail gate, the ground pressing can be adjusted according to pavement conditions, the construction quality is guaranteed, the energy consumption is effectively reduced, and the operation is convenient.

The invention discloses a pavement milling machine, which comprises a frame (1), a material filling belt conveyor (2) and a lifting oil cylinder (3), an input end (25) and an output end (24) which are relatively arranged in the material filling belt conveyor, the material filling belt conveyor is hinged to the frame through a first hinge point (21), one end of the lifting oil cylinder is hinged to the frame, the other end of the lifting oil cylinder is hinge to the material filling belt conveyor through a second hinge point (22), and the second hinge point is positioned over the first hinge point, the first hinge point is positioned between the second hinge point and the input end of the material filling belt conveyor. The first hinge point enables relative movement to the input end upwardly, The own weight of the input end is capable of effectively mitigating the load of the lifting oil cylinder according to the lever principle, so that the pressure of hydraulic oil in the cylinder is reduced, the risks of inner leakage of hydraulic oil and settlement of the oil cylinder can be reduced, thereby the security and reliability of the pavement milling machine are substantially enhanced.

The invention provides a novel production method of concrete. The concrete is produced by mixing, by weight, 40-70 parts of road milling waste, 10-20 parts of aggregates prepared from construction waste, 5-15 parts of fly ash, 15-30 parts of cement, 0.02-0.2 part of admixture and 10-50 parts of water, wherein the milling waste is graded aggregates prepared from bituminous concrete pavement milling waste. By means of the novel production method of the concrete, pavement milling materials, the construction waste and waste steel dregs can be fully recycled, and the concrete meeting needs is obtained at low production cost.

The invention provides a grading method of an emulsified asphalt cold in-place recycling mixture. The emulsified asphalt cold in-place recycling mixture is prepared from emulsified asphalt, an old pavement milling material, aggregate, cement and water; a new aggregate doping amount is determined according to the thickness of a cold recycling structure and a old pavement milling thickness; meanwhile, the grading of the emulsified asphalt, coarse aggregate, fine aggregate, the cement and the water in novel aggregate is controlled, so that the emulsified asphalt cold in-place recycling mixture provided by the invention has good pavement performance. Meanwhile, the invention provides the emulsified asphalt cold in-place recycling mixture obtained by the grading method and application of the emulsified asphalt cold in-place recycling mixture to old pavement repairing and modification.

A disclosed pavement milling apparatus comprises a milling-apparatus main support; one side of the bottom of the main support is provided with a motor fixing plate, and the other side of the bottom of the main support is flexible provided with a cutter adjusting clamping plate; a driving motor is arranged on the motor fixing plate; the output shaft of the driving motor is coaxially fixedly provided with a spline shaft; the top of the spline shaft penetrates the cutter adjusting clamping plate; and the spline shaft is sleeved by milling cutter wheels and a limit casing pipe. The pavement milling apparatus has the advantages that milling apparatuses with different width can be obtained through combination according to user demands, cutter wheels are easy and convenient to replace, the dumping direction and the direction for cutting edges of a reference layer are selectable, cut reference-layer edges are tidy, and because two employed cutter wheels have different structures and are used to specifically process pavement, the cutting resistance is reduced and milling and ditching operations are steady.

The invention discloses a pavement milling machine and an operating method of the pavement milling machine. The pavement milling machine comprises a milling depth displaying and leveling device, support oil cylinders (4), wheel installing frames (5), a machine frame (8) and milling drums (7) arranged below the machine frame (8), wherein the wheel installing frames (5) are used for supporting the machine frame (8) through the support oil cylinders (4); the milling depth displaying and leveling device comprises a depth simulating controller (1) and coiled ropes (2), wherein the coiled ropes (2) are coiled in the depth simulating controller (1), and extends outside and fixedly connected to the wheel installing frames (5); and the depth simulating controller (1) is used for detecting and displaying the variable of the extending length of the coiled ropes (2), and is arranged on the machine frame (8) so as to move along with the lifting of the milling drums (7). With the adoption of the pavement milling machine, the mechanical milling depth displaying and leveling device can be manually adjusted or zeroed; and the pavement milling machine is conveniently operated, and specifically the pavement milling machine is convenient for an operator to mill through a plurality of cutters, therefore, higher milling precision can be obtained, and high smoothness can be ensured.

The invention discloses a multifunctional self-positioning broken pavement milling machine. The multifunctional self-positioning broken pavement milling machine comprises a machine frame, a cutting device, a hammering device, a milling device and a positioning control system, wherein the cutting device, the hammering device and the milling device are arranged on the machine frame in an integration manner; the positioning control system is used for positioning a broken pavement and comprises vision sensors, displacement sensors and a central controller. When the multifunctional self-positioning broken pavement milling machine is used, the vision sensors which are mounted on all the devices are used for scanning back and forth by virtue of a computer control technology, the positions of irregular pits needing to be processed in the pavement are recorded, the irregular pits are self-positioned and are processed into regular pits which can be filled with asphalt according to the feedback information of each sensor, and the machine has the advantages of high intelligence, quickness, high maneuverability, high efficiency and reliability.

The invention discloses a milling planing rotor base locating device used by a pavement milling planer, and relates to engineering machinery. The milling planing rotor base locating device comprises a barrel body, a base, a cutter sleeve and a cutter head, wherein a locating groove is manufactured on the bottom surface of the base; a locating block is fixed on an external cylindrical surface of the barrel body; and when the base is replaced by a new base, the locating groove of the base is inserted and then welded in the locating block, so that the base can be accurately located. When the base is replaced by the new base, the operation is convenient and fast, the location is accurate, and the working efficiency is high. The base is closely matched and connected with the locating block by the locating groove, so that the connection rigidity can be improved. The locating block is welded on the barrel body or connected on the barrel body in other ways.