CN209927250U - Pavement indoor sand adding control device for accelerating abrasion - Google Patents

Abstract

The utility model discloses an indoor mill with higher speed in road surface consumes with adding sand controlling means, it includes the box, stores up sand bucket, conveyer belt driving motor, support frame, weighing bucket, weighing transducer, preset number counter, digital display time relay, expansion plate, a sand outlet cylinder, rivers controller, water pipe access mouth. Use the utility model discloses can be used to the indoor wearing and tearing device in all kinds of road surfaces, can effectively accelerate mixture wearing and tearing speed, can accurate regulation and control wearing and tearing sand addition amount and add the time simultaneously, improve the stability of wearing and tearing degree to more effectual simulation road surface cling compound decay characteristic.

Description

Pavement indoor sand adding control device for accelerating abrasion

Technical Field

The utility model belongs to the technical field of road engineering test equipment, concretely relates to indoor accelerated wear of road surface is consumed with adding sand controlling means.

Background

The road construction of China is developed rapidly since the reform is opened, particularly, the country ranks the road construction as key infrastructure construction, the investment of the road construction is increased, and the pace of the road construction is quickened. By the end of 2018, the total mileage of the expressway in China breaks through 14 thousands of highways. With the increasing highway mileage in China, the problem of skid resistance of asphalt pavements has become a technical problem in the field of road engineering. It has been found that most highway asphalt pavements can maintain high skid resistance in the early construction stage, but as the operation time is prolonged and the traffic volume is rapidly increased, the stone on the surface layer can be quickly ground or flattened, so that the skid resistance of the pavement is rapidly lost. The rapid attenuation of the anti-skid performance of the road surface causes frequent traffic accidents on the highway, and the related investigation surface shows that the occurrence of the traffic accidents on the highway is mostly related to the insufficient anti-skid performance of the road surface, so that the research for enhancing the attenuation of the anti-skid performance of the road surface is a fundamental method for reducing the occurrence rate of the traffic accidents in the aspect of road design.

For the anti-skid performance of the road surface, the contact characteristic of the tire and the asphalt road surface is the key of the anti-skid performance. Along with the extension of the open traffic time of a newly-built expressway, dust, rubber powder ground by tires, deicing compounds used in winter and other particles are gradually accumulated on the surface of the expressway, the asphalt pavement is rubbed by rolling of vehicles coming and going and attached to the tires, the road surface is subjected to accelerated abrasion along with the driving of the vehicles, and in northern areas, the vehicles are provided with anti-skid chains in ice and snow weather, so that the vehicles are more seriously abraded to the texture structure of the road surface.

Because the construction pace of the expressway in China is fast, only the initial antiskid performance of the pavement is concerned in the construction period at present, the long-term antiskid decay law is not mastered, and many expressways find that the antiskid indexes such as the pavement transverse force coefficient and the like can not meet the requirements even in the completion acceptance after two years of vehicle passing operation, and the driving safety is greatly reduced due to untimely maintenance measures. Therefore, the research and the mastering of the decay characteristic of the anti-skid performance of the asphalt pavement in the operation period have important significance for ensuring and improving the long-term operation safety performance of the asphalt pavement of the high-grade highway in China.

At present, a miniature loop testing machine is generally adopted at home and abroad to accelerate the abrasion of the asphalt pavement so as to obtain the decay characteristic of the anti-skid performance, and when the miniature loop testing machine is used for testing, the abrasion period is too long, the loss of a tyre of a wheel is too large, and an effective decay rule of the anti-skid performance cannot be obtained in a reasonable test period. The invention adopts the spreading of the abrasion sand to accelerate abrasion, and accurately controls the abrasion sand consumption and the shakeout period through a weight sensor, a preset number counter, a digital display time relay and the like, thereby greatly shortening the experimental abrasion period and effectively simulating the anti-skid decay characteristic under different road conditions.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an indoor wearing and tearing with higher speed of road surface are with adding sand controlling means.

In order to solve the above problem, the utility model adopts the following technical scheme:

the utility model provides an indoor wearing and tearing with accelerating of road surface adds sand controlling means, includes the box, stores up the sand bucket, the conveyer belt, conveyer belt driving motor, the support frame, the weighing bucket, weighing transducer, the preset number counter, digital display time relay, the expansion plate, go out a sand section of thick bamboo, rivers controller, water pipe access mouth.

The box is an iron cuboid box, and a sand storage barrel is arranged at the top of the box, so that the wearing sand can be conveniently and timely supplemented.

The sand storage barrel is in a shape of a transverse triangular prism, the upper surface of the sand storage barrel is provided with an opening, and the lower part of the sand storage barrel is provided with a sand abrasion scattering gap, so that the sand abrasion can uniformly and slowly flow out.

The conveying belt is located below a sand scattering gap of the abrasion sand storage barrel, the width of the conveying belt is slightly wider than that of the sand scattering gap of the sand storage barrel, one end of the conveying belt is located above the weighing barrel, and a conveying belt driving motor is arranged at the other end of the conveying belt.

The conveyer belt is provided with a conveyer belt support, so that one end of the conveyer belt, which is horizontal or is above the weighing barrel, is slightly higher than the other end of the conveyer belt, and the abraded sand is prevented from sliding to the weighing barrel under the action of gravity when the conveyer belt is not in operation.

The conveying belt is rough in surface, certain friction resistance exists, the abrasion sand is static relative to the surface of the conveying belt, and the abrasion sand is prevented from sliding downwards along the conveying belt.

The conveyer belt driving motor is positioned at one end of the conveyer belt, and the starting and stopping of the conveyer belt driving motor are controlled by a preset number counter.

The support frame includes a platform of four stands, and stand and bottom half welding, conveyer belt driving motor and drive belt support are all fixed on the platform.

The weighing barrel is in a round table shape and is positioned below the conveyor belt, the upper surface of the weighing barrel is provided with an opening, and the lower surface of the weighing barrel is provided with a telescopic plate which is fixed on the weight sensor.

The weight sensor is an output device which converts a weight signal into an electric signal and can send the electric signal to a preset number counter.

The weight sensor is welded on the side wall of the box body, and the other end of the weight sensor is fixed with the weighing barrel.

The preset number counter receives an electric signal of the weight sensor, and when the weight of the abrasion sand reaches a set value, the preset number counter sends a control instruction to control the conveyor belt driving motor to stop working, so that the feeding process is controlled.

The preset number counter is provided with a display screen and a button for setting the weighing weight, the preset weight can be set through the button, and the display screen displays the weight of the abrasion sand in the weighing barrel in real time.

The digital display time relay works based on the electromagnetic principle to delay the closing or breaking of the contact, starts timing after receiving a starting signal, and works to open or close the contact after timing is finished.

The digital display time relay is provided with a display screen and a button for setting the shakeout period, the display screen can display the time from the shakeout time point in real time, and the display number is countdown.

The telescopic plate is positioned at the bottom of the weighing barrel and fixed on the weighing barrel, can finish telescopic action, and can store the worn sand in the weighing barrel when extending out and flow out when retracting.

Go out a sand section of thick bamboo most and be located the box outer end, the wearing and tearing sand that the weighing bucket flowed out can be received to box inside part, and external pipeline one end is provided with the water pipe and inserts the mouth, and the external pipeline other end extends to used rut board upper portion of experiment.

The water flow controller is installed on the water pipe inlet and can control the flow rate of water flow.

The water pipe access port can be connected with tap water, and the abrasion sand is completely conveyed to the rut plate by means of the scouring force of the tap water.

The utility model discloses can realize accurate weighing control and shakeout cycle control.

The weighing control can detect the weight of the abrasion sand in the weighing barrel in real time through the weight sensor and reflect the weight in a preset number counter display screen, and when the weight of the abrasion sand in the weighing barrel reaches the preset weight, the preset number counter sends a control instruction to suspend the work of the conveyor belt driving motor.

The period control is mainly realized by controlling a telescopic plate at the bottom of the weighing barrel. The device can set the shakeout period at a digital display time relay. Starting timing after the digital display time relay is started, wherein the expansion plate is in an extending state, and the abrasion sand is stored in the weighing barrel; when the time point is reached, the digital display time relay sends an instruction to the telescopic plate to enable the telescopic plate to be pulled away, the abrasion sand flows out along the pipeline, then the telescopic plate returns to the original position, and the equipment starts the next period.

Compared with the prior art, the utility model discloses an advantage specifically lies in: the abrasion sand is spread in the asphalt pavement accelerated abrasion test, so that the abrasion test piece can be effectively accelerated; the weight of the abraded sand and the period of the shakeout are accurately controlled, and the decay characteristic of the anti-sliding performance of the asphalt pavement under different road conditions is effectively simulated.

Drawings

Fig. 1 is the utility model relates to an indoor accelerated wear of road surface is with adding sand controlling means schematic structure.

In the figure: 1. the device comprises a box body, 2 parts of a sand storage barrel, 3 parts of a preset number counter, 4 parts of a digital display time relay, 5 parts of a weight sensor, 6 parts of a telescopic plate, 7 parts of a conveyor belt, 8 parts of a weighing barrel, 9 parts of a conveyor belt driving motor, 10 parts of a support frame, 11 parts of a sand outlet barrel, 12 parts of a water pipe access port and 13 parts of a water flow controller.

Detailed Description

And (3) connecting one end of the sand outlet cylinder 11 with an external pipeline to the surface of the abrasion test piece, and ensuring that abrasion sand can be uniformly scattered on the wheel track belt in the abrasion process of the test piece.

And starting an asphalt mixture test piece abrasion test, switching on a power supply of the equipment, and simultaneously turning on a control switch of a preset number counter 3 and a digital display time relay 4.

The single sanding amount and the sanding time interval required by the test are respectively set in a preset number counter 3 and a digital display time relay 4.

A certain amount of the abraded sand is put into the sand storage barrel 2, and the equipment operation switch is turned on at the same time.

The conveyor belt driving motor 9 starts to drive the conveyor belt 7 to move, the abraded sand in the sand storage barrel 2 is uniformly spread on the conveyor belt along the conveyor belt 7, and finally the abraded sand is conveyed into the weighing barrel 8.

The weight sensor 5 senses the weight of the abrasion sand in the weighing barrel 8 in real time and displays the weight on the display screen of the preset number counter 3 in real time. When the weight of the abraded sand reaches the set weight, the preset number counter 3 sends out a control instruction to close the conveyor belt driving motor 9, and the conveyor belt 7 stops feeding.

The digital display time relay 4 keeps timing according to the set cycle, and when the appointed time point, the digital display time relay 4 sends the signal of telecommunication to expansion plate 6, and expansion plate 6 contracts, and the wearing and tearing sand in the weighing bucket flows out.

The abrasion sand flows into the sand outlet cylinder 11, and water flow with fixed flow rate, which is connected by the water pipe connecting port 12 and is set by the water flow controller 13, is flushed onto the wheel track belt of the track plate for the test.

Claims (8)

1. The utility model provides an indoor wearing and tearing with accelerating of road surface adds sand controlling means which characterized in that includes box (1), stores up sand bucket (2), preset number counter (3), digital display time relay (4), weighing bucket (8), conveyer belt drive motor (9), support frame (10), goes out sand section of thick bamboo (11), water pipe access mouth (12), rivers controller (13).

2. The sand adding control device for indoor accelerated wear of pavement according to claim 1, characterized in that the sand storage barrel (2) is embedded on the box body (1), the lower part of the sand storage barrel is provided with the conveyor belt (7), and a gap with a certain width is formed between the bottom of the sand storage barrel (2) and the conveyor belt (7) so as to facilitate outflow of the wear sand.

3. The sand feeding control device for indoor accelerated wear of pavement according to claim 1, wherein the conveyor belt (7) is driven by a conveyor belt driving motor (9) to drive the conveyor belt (7) to rotate clockwise, and the conveyor belt (7) and the conveyor belt driving motor (9) are both mounted on the support frame (10).

4. The sand-adding control device for indoor accelerated wear of pavement according to claim 1, wherein the weighing barrel (8) is located below the shakeout end of the conveyor belt (7), and is open at the upper part and is provided with the expansion plate (6) at the lower part.

5. The sand feeding control device for indoor accelerated wear of pavement according to claim 1, wherein the weight sensor (5) is capable of detecting the weight of the sand in the weighing barrel in real time and sending an electric signal to the preset number counter (3).

6. The sand adding control device for the accelerated wear in a pavement chamber as claimed in claim 5, wherein the preset number counter (3) can receive the electric signal of the weight sensor (5) and can control the start and stop of the conveyor belt driving motor (9).

7. The device for controlling the sand feeding for the indoor accelerated abrasion of the pavement according to claim 1, wherein the digital display time relay (4) can send a command to the expansion plate (6).

8. The sand feeding control device for accelerated wear in a pavement chamber according to claim 1, wherein the water flow controller (13) is installed on the water inlet (12), and the water flow controller (13) is capable of controlling the flow rate of the water flow.

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