阅读说明：本技术 一种基于车轮荷载的基层材料冲刷试验装置 (Base material washout test device based on wheel load ) 是由 郑木莲 李宜锋 孙志强 刘兆平 张春海 孙洪福 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种基于车轮荷载的基层材料冲刷试验装置,立柱竖立固定于试验基座上,水槽位于试验基座上,立柱的顶部设置有滑动导轨,滑动平台位于所述滑动导轨上,变速电机的输出轴通过曲柄连杆与滑动平台相连接,液压升降装置位于滑动平台上,顶板固定于液压升降装置的输出轴上,顶板上设置有配重块,连接杆的上端固定于顶板上,连接杆的下端固定于固定板上,试验轮连接于固定板的底部,试件位于水槽内,试验轮位于试件上,水槽内注有水,且水槽内的水漫过所述试件,控制系统与液压升降装置的控制端及变速电机的控制端相连接,该装置能够更好的模拟道路实际的冲刷情况。(The invention discloses a base material scouring test device based on wheel load, wherein an upright post is vertically fixed on a test base, a water tank is positioned on the test base, the top of the upright post is provided with a sliding guide rail, a sliding platform is positioned on the sliding guide rail, an output shaft of a variable speed motor is connected with the sliding platform through a crank connecting rod, a hydraulic lifting device is positioned on the sliding platform, a top plate is fixed on the output shaft of the hydraulic lifting device, the top plate is provided with a balancing weight, the upper end of the connecting rod is fixed on the top plate, the lower end of the connecting rod is fixed on a fixing plate, a test wheel is connected with the bottom of the fixing plate, a test piece is positioned in the water tank, and the water in the water tank overflows the test piece, and the control system is connected with the control end of the hydraulic lifting device and the control end of the variable speed motor, so that the device can better simulate the actual road scouring condition.)

1. A base material erosion test device based on wheel load is characterized by comprising an upright post (9), a test base (1), a water tank (2), a sliding platform (10), a variable speed motor (7), a crank connecting rod (15), a hydraulic lifting device (13), a top plate (12), a connecting rod (11), a fixing plate (8), a test wheel (4) and a control system (18);

the upright post (9) is vertically fixed on the test base (1), the water tank (2) is positioned on the test base (1), the top of the upright post (9) is provided with a sliding guide rail (16), the sliding platform (10) is positioned on the sliding guide rail (16), the output shaft of the variable speed motor (7) is connected with the sliding platform (10) through a crank connecting rod (15), the hydraulic lifting device (13) is positioned on the sliding platform (10), the top plate (12) is fixed on the output shaft of the hydraulic lifting device (13), the top plate (12) is provided with a balancing weight (14), the upper end of the connecting rod (11) is fixed on the top plate (12), the lower end of the connecting rod (11) is fixed on the fixing plate (8), the test wheel (4) is connected with the bottom of the fixing plate (8), the test piece (3) is positioned in the water tank (2), the test wheel (4) is positioned on the test piece (3), and the water is, and the water in the water tank (2) overflows the test piece (3), and the control system (18) is connected with the control end of the hydraulic lifting device (13) and the control end of the variable speed motor (7).

2. The base material washout test device based on wheel load according to claim 1, characterized in that a test mold (5) is arranged in the water tank (2), wherein the test mold (5) comprises a bottom plate, a fixed side mold (23) and an independent side mold (24), the fixed side mold (23) is fixed on the bottom plate, the independent side mold (24) is located on the bottom plate, the independent side mold (24) is connected with the fixed side mold (23) through bolts (25), the fixed side mold (23) and the independent side mold (24) form a cylindrical structure, and the test piece (3) is located in the cylindrical structure.

3. The road wheel load-based base material scour test apparatus according to claim 2, wherein the bottom plate is fixed to the inside of the water tank (2) by iron rods (6).

4. The base material washout test device based on wheel load according to claim 1, characterized in that the control system (18) comprises a control panel, a speed change knob (19) for controlling the rotating speed of the speed change motor (7), a lifting button (20) for controlling the hydraulic lifting device (13), a display screen (21) for displaying the walking times of the test wheel (4) and a setting button (22) for setting the walking times of the test wheel (4); the control panel is connected with a speed change knob (19), a lifting button (20), a setting button (22), a speed change motor (7) and a hydraulic lifting device (13).

5. The base material washout test device based on wheel load of claim 1, characterized in that the test piece (3) is of a rectangular parallelepiped structure, and the length, width and height of the test piece (3) are 40cm, 10cm and 10cm, respectively.

6. The vehicle wheel load-based substrate washout test apparatus as claimed in claim 1, wherein the control system (18) is connected with the control end of the hydraulic lifting device (13) and the control end of the variable speed motor (7) through a lead (17).

Technical Field

The invention belongs to the field of road base material test devices, and relates to a base material scouring test device based on wheel load.

Background

In the using process of the road, road surface water enters gaps between a surface layer and a base layer of the road through channels such as cracks and the like, and if the water cannot be drained in time, the water is gradually gathered in an interface. Under the action of the load of the travelling crane, the accumulated water can generate dynamic water impact and pumping action, so that the base material is dispersed, and the fallen particles are washed away. Under the repeated impact and suction, the bottom of the plate can be hollowed, and further the surface layer is cracked and loosened.

In order to evaluate the anti-scouring performance of the base material, various testing methods and testing devices are provided at home and abroad, wherein an MTS testing machine is recommended to be adopted in the current base material testing regulations in China to carry out a base material scouring test, but the MTS testing machine is high in price and complex in operation and is difficult to popularize and use in laboratories. And the actual washing condition of the road cannot be well simulated by adopting methods such as a rotary brush and the like.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a wheel load-based base material scouring test device which can better simulate the actual scouring condition of a road.

In order to achieve the aim, the base material erosion test device based on the wheel load comprises an upright post, a test base, a water tank, a sliding platform, a variable speed motor, a crank connecting rod, a hydraulic lifting device, a top plate, a connecting rod, a fixing plate, a test wheel and a control system;

the stand is erected and fixed on the test base, the water tank is located on the test base, the top of the stand is provided with a sliding guide rail, the sliding platform is located on the sliding guide rail, an output shaft of the variable speed motor is connected with the sliding platform through a crank connecting rod, the hydraulic lifting device is located on the sliding platform, the top plate is fixed on the output shaft of the hydraulic lifting device, the top plate is provided with a balancing weight, the upper end of the connecting rod is fixed on the top plate, the lower end of the connecting rod is fixed on the fixing plate, the test wheel is connected to the bottom of the fixing plate, the test piece is located in the water tank, the test wheel is located on the test piece, water is injected into the water tank, the water in the water tank overflows through.

Be provided with the examination mould in the basin, wherein, the examination mould includes bottom plate, fixed side form and independent side form, and wherein, fixed side form is fixed in on the bottom plate, and the independent side form is located the bottom plate, and the independent side form is connected with fixed side form through the bolt, and the tubular structure is constituteed with the independent side form to the fixed side form, and the test piece is located in the tubular structure.

The bottom plate is fixed in the water tank through an iron rod.

The control system comprises a control panel, a speed change knob for controlling the rotating speed of the speed change motor, a lifting button for controlling the hydraulic lifting device, a display screen for displaying the walking times of the test wheel and a setting button for setting the walking times of the test wheel; the control panel is connected with the speed change knob, the lifting button, the setting button, the speed change motor and the hydraulic lifting device.

The test piece is of a cuboid structure, and the length, the width and the height of the test piece are 40cm, 10cm and 10cm respectively.

The control system is connected with the control end of the hydraulic lifting device and the control end of the variable speed motor through wires.

The invention has the following beneficial effects:

when the base material erosion test device based on wheel load is in specific operation, when the hydraulic lifting device is loaded, the top plate is jacked upwards, and the test wheel is lifted upwards through the connecting rod and the fixing plate; when hydraulic pressure elevating gear uninstallation, the test wheel slowly moves down, when the variable speed motor operation, drives sliding platform through the crank connecting rod and moves on sliding guide, and then drives the test wheel and walk about the test piece top surface to the actual condition of washing away of simulation road, simple structure, convenient operation, the practicality is extremely strong.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a plan view of the water tank 2 after the test mold 5 is set in the present invention.

Wherein, 1 is a test base, 2 is a water tank, 3 is a test piece, 4 is a test wheel, 5 is a test mould, 6 is an iron bar, 7 is a variable speed motor, 8 is a fixing plate, 9 is a column, 10 is a sliding platform, 11 is a connecting rod, 12 is a top plate, 13 is a hydraulic lifting device, 14 is a balancing weight, 15 is a crank connecting rod, 16 is a sliding guide rail, 17 is a lead, 18 is a control system, 19 is a variable speed knob, 20 is a lifting button, 21 is a display screen, 22 is a setting button, 23 is a fixed side mould, 24 is an independent side mould, and 25 is a bolt.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1, the base material erosion test device based on wheel load of the present invention includes a column 9, a test base 1, a water tank 2, a sliding platform 10, a variable speed motor 7, a crank connecting rod 15, a hydraulic lifting device 13, a top plate 12, a connecting rod 11, a fixing plate 8, a test wheel 4, and a control system 18; the upright post 9 is vertically fixed on the test base 1, the water tank 2 is located on the test base 1, the top of the upright post 9 is provided with a sliding guide rail 16, the sliding platform 10 is located on the sliding guide rail 16, an output shaft of the variable speed motor 7 is connected with the sliding platform 10 through a crank connecting rod 15, the hydraulic lifting device 13 is located on the sliding platform 10, the top plate 12 is fixed on an output shaft of the hydraulic lifting device 13, the top plate 12 is provided with a balancing weight 14, the upper end of the connecting rod 11 is fixed on the top plate 12, the lower end of the connecting rod 11 is fixed on the fixing plate 8, the test wheel 4 is connected to the bottom of the fixing plate 8, the test piece 3 is located in the water tank 2, the test wheel 4 is located on the test piece 3, the water is injected into the water tank 2, the water in the water tank 2 overflows the test piece 3.

Referring to fig. 2, a test mold 5 is arranged in a water tank 2, wherein the test mold 5 comprises a bottom plate, a fixed side mold 23 and an independent side mold 24, the fixed side mold 23 is fixed on the bottom plate, the independent side mold 24 is positioned on the bottom plate, the independent side mold 24 is connected with the fixed side mold 23 through a bolt 25, the fixed side mold 23 and the independent side mold 24 form a cylindrical structure, and a test piece 3 is positioned in the cylindrical structure; the bottom plate is fixed inside the water tank 2 by an iron rod 6.

The control system 18 comprises a control panel, a speed change knob 19 for controlling the rotating speed of the speed change motor 7, a lifting button 20 for controlling the hydraulic lifting device 13, a display screen 21 for displaying the walking times of the test wheel 4 and a setting button 22 for setting the walking times of the test wheel 4; the control panel is connected with a speed change knob 19, a lifting button 20, a setting button 22, a speed change motor 7 and a hydraulic lifting device 13.

The test piece 3 is of a cuboid structure, and the length, the width and the height of the test piece 3 are 40cm, 10cm and 10cm respectively; the control system 18 is connected with the control end of the hydraulic lifting device 13 and the control end of the variable speed motor 7 through a lead 17.

When the hydraulic lifting device 13 is loaded, the top plate 12 is lifted upwards, and the test wheel 4 is lifted upwards through the connecting rod 11 and the fixing plate 8; when the hydraulic lifting device 13 is unloaded, the test wheel 4 slowly moves downwards; when the variable speed motor 7 runs, the crank connecting rod 15 drives the sliding platform 10 to move on the sliding guide rail 16, and further drives the test wheel 4 to walk left and right on the top surface of the test piece 3.

The specific working process of the invention is as follows:

1) adjusting a balancing weight 14 on the top plate 12 to enable the load of the test wheel 4 acting on the top surface of the test piece 3 to meet the test requirement;

2) soaking the test piece 3 reaching the life-preserving age for 24h, taking out the test piece 3 saturated with water after 24h, wiping the water on the surface of the test piece 3 by using a dry towel, and weighing the mass m of the test piece 3₀；

3) Placing the test piece 3 on a bottom plate, and connecting the independent side die 24 with the fixed side die 23 through bolts 25;

4) starting the control system 18, lifting the test wheel 4, and then placing the water tank 2 which is not filled with water on the test base 1;

5) placing the whole test mold 5 containing the test piece 3 into the water tank 2, and fixing the test mold 5 in the water tank 2 through an iron rod 6;

6) injecting water into the water tank 2 to enable the water surface to overflow the top surface of the test piece 3 by 2 cm;

7) the test wheel 4 is slowly lowered and falls on the top surface of the test piece 3;

8) setting the walking times and walking speed of the test wheel 4, and then performing a test to enable the sliding platform 10 to move back and forth left and right on the sliding guide rail 16 to drive the test wheel 4 to walk back and forth on the top surface of the test piece 3, so as to wash the top surface of the test piece 3;

9) when the walking times of the test wheel 4 reach the set times, finishing the test, lifting the test wheel 4, pulling out the iron rod 6, and then taking out the test mold 5 containing the test piece 3 from the water tank 2;

10) pouring the water in the water tank 2 into a water barrel, standing for 24 hours, pouring out the clear water at the upper layer, putting the turbid liquid at the lower layer into a drying oven for drying to obtain the mass m lost after the test piece 3 is washed₁；

11) Calculating the erosion mass loss rate gamma of the test piece 3 as m₁/m₀And evaluating the anti-scouring performance of the base material according to the scouring quality loss rate, wherein the larger the scouring quality loss rate is, the worse the anti-scouring performance of the test piece 3 is.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.