CN111504881A - A precision automatic asphalt pavement water seepage detection device - Google Patents

Abstract

The invention discloses a precise automatic asphalt pavement water seepage detection device, wherein a liquid level sensor is arranged in a precise variable cross-section measuring cylinder, one end of the liquid level sensor extending out of the precise variable cross-section measuring cylinder is connected with a signal input end of an external automatic timing controller, the lower end of the precise variable cross-section measuring cylinder is hermetically connected with a guide pipe, a base is arranged below the guide pipe, the lower end of the guide pipe is connected with a cavity in the base, the lower end of the base is open, the lower end surface of the base is hermetically buckled and pressed on an asphalt pavement, and the middle part of the guide pipe is provided with an electromagnetic valve for controlling the circulation of liquid in the guide pipe.

Description

A precision automatic asphalt pavement water seepage detection device

technical field

The invention relates to the technical field of road engineering detection, in particular to a precise automatic asphalt pavement water seepage detection device.

Background technique

Asphalt concrete pavement has the advantages of fast construction speed and good driving comfort, and has become the most commonly used pavement form in my country in recent years. However, if the water permeability coefficient of asphalt concrete pavement does not meet the design requirements, it is easy to produce pits, looseness and other diseases. The infiltration of water along the diseased part to the base and soil foundation will cause local water damage, and in severe cases, the bearing capacity of the roadbed will be reduced. In order to improve the construction quality of asphalt concrete pavement and prevent the occurrence of water damage, the determination of water permeability coefficient is very important. At this stage, the road water seepage meter we use is to quickly turn on all switches manually after filling 600mL of water in the graduated cylinder. When the water level drops by 100mL, press the stopwatch immediately, and stop timing when the water level drops by 500mL. The whole process of this water seepage meter is manually operated. The stopwatch is manually turned on and off when the water level drops by 100mL and 500mL with the naked eye. During this time, there is a time difference between reception and response, resulting in deviations in the measurement of water seepage amount and water seepage time, and the calculation of water seepage coefficient is not accurate. Accurate, and the operation process is also more complicated, often requiring the cooperation of many people.

SUMMARY OF THE INVENTION

The purpose of the present invention is to make up for the defects of the prior art, and to provide a precise automatic asphalt pavement water seepage detection device, so as to solve the problems of large measurement error and manpower consumption of the traditional water seepage meter.

The present invention is achieved through the following technical solutions:

A precision automatic asphalt pavement water seepage detection device includes a precision variable section measuring cylinder, a liquid level sensor is installed inside the precision variable section measuring cylinder, the liquid level sensor protrudes from one end of the precision variable section measuring cylinder and the signal input of a peripheral automatic timing controller The lower end of the precision variable section measuring cylinder is sealed and connected with a catheter, a base is arranged under the catheter, the lower end of the catheter is connected to the cavity inside the base, the lower end of the base is open, and the lower end surface of the base is sealed and withheld at the bottom of the base. On the asphalt road, a solenoid valve is arranged in the middle of the conduit to control the flow of liquid in the conduit, and the solenoid valve is connected with an automatic timing controller.

The precision variable section measuring cylinder is made of plexiglass, and a scale is arranged on the outer side wall of the precision variable section measuring cylinder. The upper part of the precision variable section measuring cylinder is cylindrical, and the lower part is conical. A small hole is opened, and the other end of the liquid level sensor is inserted into the precision variable section measuring cylinder through the small hole.

The liquid level sensor is provided with a photoelectric liquid level switch at the liquid level of 100ml and 500ml respectively; the liquid level sensor, the photoelectric liquid level switch, the solenoid valve and the automatic timing controller are all connected by wires; the automatic timing controller includes: The single chip microcomputer, the automatic timing module, the button module, the prompt light, the LCD screen and the power supply are respectively connected with the LCD screen, and the automatic timing module, the button module, the prompt light and the power supply are respectively connected to the single chip computer.

The catheter includes an upper end disc part and a lower end circular tube part, the radius of the upper end disc part is equal to the lower end section radius of the precision variable section measuring cylinder, and the lower end of the precision variable section measuring cylinder and the outer side of the upper end disc part of the catheter pass through the belt. The top plate is connected with the central hole of the inner thread, and the lower end of the precision variable section measuring cylinder and the outer side of the upper end disc portion of the conduit are all threadedly connected with the inner wall of the central hole of the top plate.

The base and the top plate are connected by upright pillars, an exhaust valve is also arranged on the base, and a heavy steel ring is pressurized on the base.

A sealing collar is arranged between the base and the asphalt pavement. The sealing collar is made of plastic and has the same shape and size as the contact part between the base and the asphalt pavement.

A water injection funnel is arranged at the top of the precision variable section measuring cylinder, and a sealing ring is arranged between the water injection funnel and the top inner wall of the precision variable section measuring cylinder, and the sealing ring is made of rubber.

The upper surface of the top plate is connected with the precision variable section measuring cylinder, and the lower surface and the conduit are connected by threads. The central hole of the top plate is connected with the precision variable section measuring cylinder and the conduit, and the conduit is connected with the precise variable section measuring cylinder and the base cavity; the top plate and the base are fixed by the vertical support column connect.

The advantages of the present invention are: the present invention uses two photoelectric liquid level switches on the liquid level sensor to trigger timing and stop timing when the amount of water seepage on the asphalt pavement is large (more than 400ml within 3 minutes), and the automatic timing mode reduces It can judge the error of the liquid level reaching the scale line with the naked eye and the time difference caused by the reaction time of the human body;

In the present invention, when the amount of water seepage on the road surface is small (less than 400ml in 3 minutes), the prompt light flashes when the test starts for 3 minutes, and the scale number of the precision variable section measuring cylinder is read at this time. Due to the small cross-sectional area of the upper cylinder section, the water level Sensitive to changes for accurate readings;

In the invention, the water seepage time calculated by the single-chip microcomputer is reflected on the LCD screen, so that the test results are clear and intuitive;

The invention is easy to operate, efficient in measurement, accurate in data, and greatly reduces labor intensity.

Description of drawings

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

FIG. 2 is a schematic structural diagram of the precision variable section measuring cylinder of the present invention.

Figure 3 is a schematic view of the structure of the collar.

Detailed ways

As shown in Figures 1 and 2, a precision automatic asphalt pavement water seepage detection device includes a precision variable section measuring cylinder 3, a liquid level sensor 5 is installed inside the precision variable section measuring cylinder 3, and the liquid level sensor 5 extends out of the precision variable section measuring cylinder One end of 3 is connected with the signal input end of the peripheral automatic timing controller 8, the lower end of the precision variable section measuring cylinder 3 is sealed and connected with a conduit 17, a base 19 is provided below the conduit 17, and the lower end of the conduit 17 is connected to the base 19 In the inner cavity, the bottom end of the base 19 is open, and the lower end surface of the base 19 is sealed on the asphalt road, and a solenoid valve 18 is arranged in the middle of the conduit 17 to control the flow of liquid in the conduit 17. Valve 18 is connected to an automatic timing controller.

The material of the precision variable section measuring cylinder 3 is plexiglass, a scale is provided on the outer side wall of the precision variable section measuring cylinder 3, the upper part of the precision variable section measuring cylinder 3 is cylindrical, and the lower part is conical. A small hole 4 is opened on the side near the top of the liquid level sensor 5, and the other end of the liquid level sensor 5 is inserted into the precision variable section measuring cylinder 3 through the small hole 4.

The liquid level sensor 5 is provided with a photoelectric liquid level switch 6 at the liquid level of 100ml and 500ml respectively; the liquid level sensor 5, the photoelectric liquid level switch 6, the solenoid valve 18 and the automatic timing controller 8 are all connected with a wire 7; the The automatic timing controller 8 includes a single chip 9, an automatic timing module 10, a button module 11, a prompt light 12, an LCD screen 13 and a power supply 14. The single chip 9 and the automatic timing module 10 are respectively connected with the LCD screen 13. The automatic timing module 10, The button module 11 , the prompt light 12 and the power supply 14 are respectively connected to the single chip 9 .

Described conduit 17 comprises the upper end disc part and the lower end circular tube part, the radius of the upper end disc part is equal to the lower end section radius of the precision variable section measuring cylinder 3, the lower end of the precision variable section measuring cylinder 3 is outside the upper end disc part of the conduit. The sides are connected by the top plate 15 with the central hole of internal thread.

The base 19 and the top plate 15 are connected by a vertical support column 16 , an exhaust valve 20 is also arranged on the base 19 , and a heavy steel ring 21 is pressurized on the base 19 . In the embodiment, the top plate and the base are fixedly connected by three upright pillars. The center point of the equilateral triangle formed by the three upright pillars coincides with the center point of the top plate 15 and the base 19 .

As shown in FIG. 3 , a sealing collar 22 is provided between the base and the asphalt pavement 23 . The sealing collar 22 is made of plastic and has the same shape and size as the contact part between the base and the asphalt pavement.

A water injection funnel 1 is arranged at the top of the precision variable section measuring cylinder 3, and a sealing ring 2 is arranged between the water injection funnel 1 and the top inner wall of the precision variable section measuring cylinder 3, and the sealing ring 2 is made of rubber.

The working principle of the present invention is:

1) Seal the assembled pavement base 19 on the asphalt pavement 23, and then add a weight steel ring 21 to the base;

2) When the solenoid valve 18 is in the closed state, after injecting 600mL of water into the precision variable section measuring cylinder 3, click the button module 11, the single chip 9 issues the command to open the solenoid valve 18 and turn on the automatic timing module 10; trigger when the liquid level drops to 100mL The photoelectric liquid level switch 6 at 100mL, the single-chip microcomputer 9 receives the signal and starts timing automatically; when the liquid level drops by 500mL, the photoelectric liquid level switch at 500mL is triggered, the single-chip computer stops timing, and the timing is displayed on the LCD screen 13.

3) When the amount of water seepage on the asphalt pavement 23 is small, and the liquid level does not drop to 500ml in 3mim, at this time, the single-chip microcomputer issues the command to turn on the prompt light to read the liquid level scale of the precision variable-section graduated cylinder.

Claims (7)

1. A precision automatic asphalt pavement water seepage detection device is characterized in that: include a precision variable section measuring cylinder, a liquid level sensor is installed inside the precision variable section measuring cylinder, and the liquid level sensor extends one end of the precision variable section measuring cylinder and the peripheral automatic The signal input end of the timing controller is connected, the lower end of the precision variable section measuring cylinder is sealed and connected with a guide tube, a base is arranged under the guide tube, the lower end of the guide tube is connected to the cavity inside the base, the lower end of the base is open, and the base The lower end face of the duct is sealed on the asphalt pavement, and a solenoid valve is arranged in the middle of the conduit, and the solenoid valve is connected with the automatic timing controller. 2. A kind of precision automatic asphalt pavement water seepage detection device according to claim 1 is characterized in that: the material of the precision variable section measuring cylinder is plexiglass, and a scale is provided on the outer side wall of the precision variable section measuring cylinder, and the precision variable section measuring cylinder is provided with a scale. The upper part of the cross-section measuring cylinder is cylindrical, and the lower part is conical. A small hole is opened on the side near the top of the precision variable-section measuring cylinder, and the other end of the liquid level sensor is inserted into the precision variable-section measuring cylinder through the small hole. 3. A precise automatic asphalt pavement water seepage detection device according to claim 2, wherein the liquid level sensor is provided with photoelectric liquid level switches at 100ml and 500ml of the liquid level respectively; the photoelectric liquid level switch and automatic timing The controller is connected; the automatic timing controller includes a single-chip microcomputer, an automatic timing module, a button module, a prompt light, an LCD screen and a power supply, and the single-chip microcomputer and the automatic timing module are respectively connected with the LCD screen. , and the power supply are respectively connected to the microcontroller. 4. A kind of precise automatic asphalt pavement water seepage detection device according to claim 1, it is characterized in that: described conduit comprises the upper end disc part and the lower end circular tube part, the radius of the upper end disc part and the precision variable section measuring cylinder The radii of the lower end of the measuring cylinder are equal, the lower end of the precision variable section measuring cylinder and the outer side of the upper disc part of the catheter are connected through the top plate with the center hole of the inner thread, and the lower end of the precision variable section measuring cylinder and the outer side of the upper end disc part of the catheter are connected with the top plate. threaded connection to the inner wall of the center hole. 5. A precision automatic asphalt pavement water seepage detection device according to claim 4, characterized in that: the base and the top plate are connected by a vertical support column, and an exhaust valve is also provided on the base, on the base Pressurized heavy steel rims. 6. A precise automatic asphalt pavement water seepage detection device according to claim 5, characterized in that: a sealing collar is provided between the base and the asphalt pavement, and the sealing collar is made of plastic, and its shape and size are the same as those of the asphalt pavement. The contact points between the base and the asphalt pavement are the same. 7. A precise automatic asphalt pavement water seepage detection device according to claim 1, characterized in that: a water injection funnel is provided at the top of the precision variable section measuring cylinder, and a water injection funnel is arranged between the water injection funnel and the top inner wall of the precise variable section measuring cylinder. There is a sealing ring in between.

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