JPH07103536B2 - Road surface regenerator equipped with automatic additive dispersion control system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a road surface regenerator equipped with an additive spraying device, and in particular, adjusts the amount of additive sprayed according to the running speed of the road surface regenerator. The present invention relates to a road surface layer regenerator equipped with an additive spraying device that can perform

[Prior Art] Conventionally, a road surface regenerator for repairing an asphalt paved road generally has a heater, a scarifier, a rotor, a screw spreader, a screed, etc. sequentially arranged from the front of the vehicle under the self-propelled vehicle. An additive spray nozzle is provided behind the scarifier.

In the above configuration, the on-road surface regenerator proceeds on the road requiring repair, heats the asphalt pavement road surface layer with a heater, and heats the softened pavement road surface layer with a scarifier to raise the scratched pavement body. Disperse the softening agent from the nozzle of the additive dispersion pipe to the nodule, stir with the subsequent rotor device, and level the width with a screw spreader,
Perform a compaction process with a screed.

[Problems to be solved by the invention]

In the above-mentioned conventional road surface layer regenerator, a certain amount of the softening agent sprayed from the additive spraying nozzle is uniformly sprayed at a constant speed. However, repair work is carried out regardless of cold weather.For example, since the asphalt is hard and the temperature is low during the cold season, it is necessary to slow down the traveling speed of the regenerator to ensure sufficient heating of the road surface by the heater. Become. Then, there is a problem that the softening agent, which is sprayed in a fixed amount regardless of the speed of the regenerator, is oversprayed, and the quality of the repaired pavement may be uneven.

[Means for solving problems]

It is an object of the present invention to solve the above-mentioned conventional drawbacks and to provide a road surface regenerator equipped with a computer-controlled additive spraying device capable of spraying a softening agent according to the traveling speed of the road surface regenerator. As a specific means, in a road surface regenerator equipped with an additive spraying device in which a rotor, a screw spreader, and a screed are sequentially arranged in the lower part of the self-propelled vehicle from the front, Distributing pipes having a plurality of nozzles in two parts are arranged parallel to each other in the longitudinal direction of the vehicle, and the base end of the distributing pipe is fed by an electromagnetic valve. A pipe is connected to the tank, a flowmeter transmitter and a pump are arranged on the pipe, and the base end of the pipe is connected to a tank arranged on the vehicle body, and a computer control device is arranged on the vehicle body. Then, the speed detector installed on the axle The electromagnetic valve, the flow meter transmitter, and the pump motor are electrically connected to the computer control device, respectively, and predetermined by the preset stored value corresponding to the output signal of the speed detector. It is characterized in that the rotation of the motor and the opening / closing of the electromagnetic valve are controlled based on the ratio.

[Action]

When necessary information is input to the control device when the on-road surface regenerator is used, the speed detector detects the rotation speed of the drive wheels and inputs the detected value to the control device. The control device compares the stored constant with the stored constant to control the rotational speed of the pump drive motor according to the rotational speed of the drive wheels. Therefore, when the construction speed of the surface regenerator on the road is slow, the amount of additive sprayed from the spray pipe decreases according to the vehicle speed,
Alternatively, when the construction speed is fast, the amount of additive that is sprayed from the spray pipe increases according to the vehicle speed, that is, the amount of additive that is sprayed to a certain area within a certain time affects the high and low vehicle speed. Instead, it can be maintained constant.

〔Example〕

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a road surface layer regenerator, and FIG. 2 is a block diagram of an additive dispersion device.

Since the outline of the structure of the on-road surface layer reproducing device 1 is well known, the configuration and explanation of the operation will be briefly described.

The road surface reproduction machine 1 has drive wheels 3 in the rear half of the vehicle body 2 and front wheels 4 in the front, and is driven like a normal vehicle in the driver's seat 5 in the upper front portion of the vehicle body 2 for repair work. Operate the device. Between the front wheel 4 and the drive wheel 3 in the lower portion of the vehicle body 2, the heater 6 and the scarifier are sequentially installed from the front.
7. Dispersion tubes 8, 9 and rotor device 10 are arranged respectively. The heater 6 is a gas-burner type far-infrared heater in which gas is supplied from a cylinder 6A loaded on the upper part of the vehicle body 2 through a gas pipe (not shown), and can heat the asphalt pavement road surface G in an atmosphere of about 250 ° C.

The scarifier 7 can be moved up and down by the operation of the cylinder 7A, and can scrape the surface layer of the asphalt pavement road surface G softened by the heater 6 to a depth of 5 to 6 cm.

The rotor device 10 includes two rotors 10C, 1 that rotate forward and backward in a frame 10B that can move up and down by cylinders 10A, 10A.
0D is arranged, and the nodule on the surface layer of the asphalt pavement scratched by the scarifier 7 is crushed, and the softening agent sprayed from the nozzles 8A, 9A of the spray tubes 8 and 9 is stirred. .

At the lower portion of the vehicle body 2 which is behind the drive wheels 3, the first screw spreader 11 and the first screed 1 are sequentially arranged from the front.
2, a second screw spreader 13 and a second screed 14 are arranged.

A hopper 15 is arranged on the front upper part of the vehicle body 2 to store the asphalt mixture for paving. A bar feeder 16 is arranged from a lower part of the hopper 15 to a front part of the second screed 14, and the hopper 15 and the bar feeder 16 are arranged as necessary.
2nd screed 14 for asphalt mixture for paving
Supply to the road surface in front of.

The second screw spreader 13 scrapes the asphalt mixture for pavement supplied on the road surface toward the center of the vehicle body 2 so as not to overflow the widthwise ends of the vehicle body 2, and the second screed 14 serves as the asphalt pavement. Compact the material to the specified thickness. The first screw spreader 11 scrapes up the agglomerates of the pavement surface scratched by the scarifier 7 and the asphalt mixture for paving that passes under the first screed 12, and the first screed 12 is temporarily tightened. Harden.

Both screw spreaders 11 and 13 can be moved up and down by cylinders 11A and 13A, respectively. Also both screed 1
The heaters 2 and 14 each have a built-in heater and a shaker, and their heights can be adjusted by the lifting arms 12A and 14A, respectively.

A control device 17 is mounted behind the upper portion of the vehicle body 2. An additive tank 18 is arranged below the control device 17 to accommodate the softening agent. A delivery pipe 19 is arranged from the tank 18 to the distribution pipes 8 and 9, and the portion of the delivery pipe 19 beyond the distribution pipes 8 and 9 is returned to the tank 18.

A pump 20 is provided near the tank 18 on the vehicle body 2 in the middle of the feed pipe 19, and a drive shaft 20A of the pump 20 is connected to a motor 21 with a speed reducer. Has a magnetic sensor built into the speed reducer, and is designed to measure the rotational speed.

A flowmeter transmitter is provided between the pump 20 and the spray pipe 9 in the delivery pipe 19.
22 is provided to measure the flow rate from the pump 20 and transmit the measured value. Further, an electromagnetic valve 23 is arranged in the return pipe 19A of the sending pipe 19.

A plurality of nozzles 8A, 8A ...
A, 9A ... Are respectively arranged, and electromagnetic valves 24, 25 are arranged at the base end edge portions of the spray pipes 8, 9.

A contact piece 3B is attached to the axle 3A of the drive wheel 3, and a speed detector 26 by an encoder is arranged at a position where the contact piece 3B can be intermittently approached when the contact piece 3B rotates as the axle 3A rotates. There is. The speed detector 26 emits a pulse signal each time the section 3B approaches once.

A flow meter 27 and a speedometer 28 are arranged in a place where the driver of the driver's seat 5 can easily see. A control panel 17A is arranged on the side of the box of the control device 17, and the control panel 17A has a keyed handle 17B, an operation indicator light 17C, an ON switch 17D, and an OFF switch.
Each of the 17Es is arranged and connected to an internal device. As shown in Fig. 2, the F / V converter 29 is installed inside the box,
The speed detector 26 is connected to the F / V converter 29,
The pulse frequency transmitted from the speed detector 26 is converted into a voltage corresponding to the pulse frequency, and the I / V converter 30 and the ratio controller 31 are converted.
Output to. The I / V converter 30 converts the voltage change into a speed value, and the speed is connected to the speed meter 28 so that the speed is displayed in analog.

The ratio controller 31 is connected to the flow meter 27 and the PID controller 32.

The ratio controller 31 is composed of a microcomputer, and an input board 31A is exposed on the control board 17A. A control numerical value can be stored by inputting an input key on the input board 31A. That is, input of constant set values for repair and digitally input numerical values such as the amount of asphalt contained in the surface of the existing pavement to be repaired, deterioration value of asphalt, scratching depth, reference running speed of the vehicle body, etc. Then, the speed sent from the speed detector 26 is compared with the set speed constant, and the additive amount of the additive due to the speed difference is calculated to calculate the PID.
Output to the controller 32. The PID controller 32 includes an I / V converter 33 and
It is connected to the DM converter 34. The PID controller 32 outputs a control output having a numerical value proportional to the input from the ratio controller 31.

The flowmeter transmitter 22 is connected to a DM converter 34, and the flowmeter transmitter 22 converts the numerical value measured by the flowmeter into a DM converter.
Then, the DM converter 34 transfers the input signal to the PID controller 32 directly without using the CPU. The PID controller 32 adjusts the information input input from the flowmeter transmitter 22 and the speed detector 26 and outputs the adjusted information input to the I / V converter 33.

A LA controller 35 is connected to the I / V converter 33. The LA controller 35 automatically outputs a control signal in accordance with the numerical signal sent from the I / V converter 33, and is connected to the digital meter relay 36 and the motor 21 of the pump 20.

Therefore, the motor 21 is controlled to increase or decrease the rotation speed according to the rotation speed of the drive wheels 3. That is, the motor
Since the ratio of the rotational speed of 21 and the rotational speed of the drive wheel 3 is calculated in advance and set and stored in the ratio controller 31, the rotational speed of the drive wheel 3 by the speed detector 26 is input to the ratio controller 31. Then, the LA controller 35 automatically controls the rotation speed of the motor 21 according to a predetermined ratio to control the discharge flow rate of the softening agent from the pump 20.

The flowmeter transmitter 22 measures the flow rate of the softening agent in the pipe 19 and feeds it back to the PID controller 32.

Further, the solenoid valves 23, 24, 25 are digital meter relays 36
Is electrically connected to the PID controller 32, one solenoid valve 25 is closed when the number of the spray tubes 8 and 9 is only required by the output command from the PID controller 32, and both solenoid valves 24 are closed when the vehicle is stopped. , 2
5 is closed and the return solenoid valve 23 is opened.

In the above configuration, a part of the pavement road surface G to be repaired at the repair work site is sampled, the asphalt content in the pavement surface layer, the degree of deterioration, etc. are measured in advance, and the data is controlled by the control device 17. Digitally input by operating the key button on the input panel 31A exposed on the panel 17A. Further, the depth of the surface layer that causes the scarifier 7 to be input is also input. Therefore, the rotation speed control constant of the motor 21 according to the rotation speed of the drive wheel 3 is stored and input in advance.

The work is started by the above. As a preceding vehicle, a road heating vehicle precedes the paved road surface G to heat the surface layer. After that, the on-road surface regenerator 1 continues. The heater 6 supplementarily heats the surface layer. The scarifier 7 is lowered by the operation of the cylinder 7A so that the tip of the claw 7B is buried to a predetermined depth. Further, the rotor device 10 also operates the cylinder 10A so as to lower the rotors 10C and 10D so that the rotors 10C and 10D are embedded in the surface layer at a predetermined depth, rotate the rotors 10C and 10D, and rotate the frame 10B.
The inside is kept warm by a separate heater.

When the driving of the driving wheels 3 starts the forward movement of the road surface layer regenerator 1, the surface layer is scratched by the scarifier 7, and the asphalt softening agent is sprayed from the nozzles 8A ... Is sprayed. The application amount of the softening agent is controlled so that it is high when the speed is high, low when the speed is low, and a small amount when the speed is low, so that a predetermined amount is sprayed over a predetermined area in total.

The surface nodule on which the softening agent is sprayed is stirred by the rotors 10C and 10D of the rear rotor device 10 and the surface is leveled by the leveling plate 10E.

Next, the rear first screw spreader 11 uniformly moves the surface nodule in the width direction of the road, and the first screed
Tighten at 12. If the repair can be performed sufficiently with this, the road surface is finished by rolling with another roller car that follows, but if it is necessary to replenish the surface with new asphalt mixture, store it in the hopper 15. A certain paving asphalt mixture is dropped behind the first screed 12 by the operation of the bar feeder 16, and the second screw spreader
The new mixture is uniformly distributed in the width direction of the road surface by 13 and is compacted by the second screed 14. After that, it is rolled and finished by the roller car that follows.

As described above, in the present invention, the object is to evenly distribute a certain amount of the softening agent to a certain area of the road surface to be repaired, and therefore the vehicle speed of the road surface layer regenerator is, for example, every minute. The drive of the pump 20 is controlled according to the speed detected by the speed detector 26 so that the same amount is not discharged at both 1 m and 8 m. That is, when the number of pulses transmitted by the speed detector 26 is 150 / min when the vehicle speed is 1 m / min, the number of pulses is 1200 / min when the vehicle speed is 8 m / min. Therefore, if the flow rate of the additive at a vehicle speed of 1 m / min is 60 l / min, a flow rate of 8 l / sec must be maintained at a vehicle speed of 8 m / min.
When a signal of 1200 / min is input, the discharge flow rate of the pump 20 is controlled to increase by a multiple of 150 / min.
As a result, even if the vehicle speed is fast or slow, the flow rate of the additive in one minute is not the same in total, and an equal amount of the additive is sprayed to the road surface of the same area regardless of the speed of the road surface regenerator. Therefore, the quality of the pavement to be regenerated can be uniformly regenerated. The additive is not limited to the softening agent.

〔effect〕

 The present invention has the following excellent effects.

(1) Since it is possible to spray a certain amount of additive on a road surface having a certain area without being affected by the speed of the surface regenerator on the road,
Homogeneous surface regeneration is possible.

(2) The durability of the pavement portion can be maintained uniformly because the uniform regeneration can be performed.

(3) The device has a simple structure and is excellent in operability.

(4) Since the additive spraying device is structurally simple and unitized, it can be easily attached to a ready-made road surface reproduction machine, and the performance of the road surface reproduction machine can be greatly improved at low cost. .

[Brief description of drawings]

FIG. 1 is a side view of a road surface layer regenerator according to an embodiment of the present invention, and FIG. 2 is a block diagram of an additive spraying device. 1 ... Road surface reproduction machine, 2 ... Car body 3 ... Drive wheel, 3A ... Axle 3B ... Section, 4 ... Front wheel 5 ... Driver's seat, 6 ... Heater 7 ... Scalifier, 8, 9 ... Spreading pipe 8A, 9A ... Nozzle, 10 ... Rotor device 10B ... Frame, 10C, 10D ... Rotor 10E ... Spreading plate 11 ... First screw spreader 12 ... First screed 13 ... Second screw spreader 14 ... Second screed, 15 ... Hopper 16 ... Bar feeder, 17 ... Control device 17A ... Control panel, 17B ... Handle 17C ... Operation indicator light, 17D ... On switch 17E ... Off switch, 18 ... Tank 19 ... Pipe, 20 ... Pump 20A ... Drive shaft, 21 ... Motor 22 ... Flowmeter Transmitter, 23, 24, 25 ... Electromagnetic valve 26 ... Speed detector, 27 ... Flowmeter 28 ... Speedometer, 29 ... F / V converter 30 ... I / V converter, 31 ... Ratio controller 31A ... Input panel , 32… PID controller 33… I / V converter, 34… DM converter 35… LA controller, 36… Digital meter relay

Claims (1)

[Claims] 1. A road surface regenerator equipped with an additive spraying device in which a rotor, a screw spreader, and a screed are sequentially arranged in the lower part of a self-propelled vehicle from the front, and a plurality of nozzles are provided in the front part of the rotor. Distributing pipes are arranged in two lines parallel to each other in the vehicle width direction, and electromagnetic valves are provided at the base end edges of the distributing pipes to connect the proximal end of the distributing pipe to the feeding pipe. The pipe is provided with a flowmeter transmitter and a pump, the base end of the pipe is connected to an additive tank provided on the vehicle body, and a computer control device is provided on the vehicle body.
The speed detector installed on the axle is connected to the computer control unit, and the electromagnetic valve, the flowmeter transmitter, and the drive motor of the pump are electrically connected to the computer control unit to output the output of the speed detector. Preliminarily entered amount of asphalt contained in the existing pavement surface layer corresponding to the signal, asphalt deterioration value, scratching depth, reference speed of the car body, etc. Based on the above, by controlling the opening / closing of the electromagnetic valve in response to the signal of the speed detector to control the spraying amount of the additive, it is possible to maintain the additive amount constant without being affected by the vehicle speed. A road surface regenerator equipped with an automatic additive dispersion control system, which is characterized by its possible structure.