A method for detecting adhesion performance of road marking paint and glass beads

Abstract

The invention relates to a method for detecting the adhesion performance of road marking paint and glass beads, and belongs to the technical field of mechanical method testing materials. The method comprises: step S1: selecting a road section to be constructed with a length of one meter on the ground at both end entrances and the middle section of a tunnel to be constructed as a detection area; step S2: marking hot-melt road marking paint and spreading glass beads in the detection area according to process parameters, and performing maintenance; step S3: after the maintenance, selecting a 1.5-ton to 2-ton engineering vehicle with rubber tires to roll the detection area for multiple times; step S4: applying pressure to the upper surface of the glass beads on the road marking paint in the detection area by the end face of a rotating rubber disk, and then performing rotational friction; the method can solve the technical problem that in the prior art, a paint film abrasion instrument is used to evaluate the adhesion performance through the loss of mass, and accurate and effective detection results cannot be obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical method testing materials, and particularly relates to a method for detecting the adhesion performance of marking paint and glass beads. Background Art

[0002] The combination of road marking paint and glass beads is a common method of using reflective markings on roads, especially in tunnels. The reflective marking construction in tunnels generally adopts the application of hot-melt road marking paint, and then sprinkles national standard No. 1 glass beads on the surface of the hot-melt road marking paint so that the glass beads are embedded in the paint to improve the reflective performance. Therefore, the adhesion performance of glass beads and road marking paint determines the durability of the reflective marking. Therefore, how to detect the adhesion performance of glass beads and road marking paint is a problem that technicians in this field need to solve.

[0003] The existing patent with application number 202110125341.1 discloses an evaluation index and method for the adhesion performance of marking paint and glass beads. A paint film abrasion meter is used as a testing equipment, and a wear test is carried out on the sample using the paint film abrasion meter. The mass loss of the surface-sprinkled glass beads before and after the test is used to evaluate the adhesion performance of the surface-sprinkled glass beads.

[0004] The prior art has the following defects:

[0005] The paint film abrasion tester uses the circumferential surface of the abrasive wheel to carry out abrasion test on the sample to be tested. The circumferential surface is in line contact with the test area, and the contact area is small. There is abrasion of the marking paint and the surface of the glass beads in the gaps where the glass beads are spread. Therefore, the lost mass is not entirely the mass of the detached glass beads. Therefore, it is impossible to obtain accurate and effective test results by evaluating the adhesion performance through the loss of mass. Summary of the invention

[0006] The invention provides a method for detecting the adhesion performance of a marking paint and glass beads, which can solve the technical problem in the prior art that an accurate and effective detection result cannot be obtained by evaluating the adhesion performance through the loss of mass using a paint film abrasion meter.

[0007] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0008] The present application provides a method for detecting the adhesion performance of road marking paint and glass beads, which comprises the following steps:

[0009] Step S1: Selecting the sections of the tunnel to be constructed, each with a length of one meter, at the entrances at both ends and the middle section of the tunnel to be constructed as the detection area;

[0010] Step S2: applying hot melt road marking paint and spreading glass beads in the inspection area according to the process parameters, and performing maintenance;

[0011] Step S3: After the maintenance is completed, a 1.5-ton to 2-ton engineering vehicle with rubber tires is used to roll over the inspection area multiple times;

[0012] Step S4: applying pressure to the upper surface of the glass beads on the marking paint in the detection area with the end surface of the rotating rubber disk and then performing rotational friction.

[0013] Through the above technical scheme, the area to be tested is made in the construction section to improve the similarity between the test result and the final construction effect, thereby improving the effectiveness of the test result; the end face of the rubber disk applies pressure to the surface of the glass beads in the area to be tested and then rotates and rubs them, thereby increasing the effective contact time between the rubber disk and the glass beads through surface contact, while avoiding the rubber disk from rubbing the coating layer, thereby improving the accuracy of the test result.

[0014] In the present invention, in the above step S4, the power source for driving the rubber disk to rotate has a power identification device.

[0015] Through the above technical solution, the adhesion can be accurately quantified by identifying the power source of the rubber disc, thereby avoiding the deviation caused by subjective judgment.

[0016] In the present invention, the power source is an electric spindle, and the electric spindle utilizes the monitoring function of the electric spindle driver to obtain the load power of the electric spindle.

[0017] Through the above technical solution, the load power is directly obtained by using the electric spindle, and the result is more accurate.

[0018] In the present invention, the power source is a variable frequency motor, a main shaft of the variable frequency motor is provided with a strain gauge, and the strain gauge outputs the load power of the main shaft.

[0019] Through the above technical solution, strain gauges and variable frequency motors are used to obtain load power, which improves the applicability of the device and reduces the detection cost.

[0020] In the present invention, a discharge groove is provided on the end surface of the rubber disc, and the width of the discharge groove allows the glass beads that fall off from the marking paint to pass through.

[0021] Through the above technical solution, a discharge chute is used to discharge the detached glass beads out of the detection area through centrifugal force, thereby reducing the interference of the detached glass beads on the detection results and further improving the accuracy of the detection.

[0022] In the present invention, in the above step S5, by identifying the maximum load power of the power source after the preset time period and comparing it with the initial load power of the power source, the shedding rate of the glass beads is calculated according to the value of the load power reduction.

[0023] Through the above technical scheme, a fixed rotation speed and a fixed downward stroke are used to obtain the initial spindle load power. When the glass beads fall off and are discharged from the detection area, the friction of the glass beads on the rubber disk is reduced, and then the spindle load power is reduced. Through the change of the spindle load power, the shedding rate of the glass beads is obtained more intuitively and accurately, thereby obtaining accurate and effective adhesion test results.

[0024] In the present invention, in the above step S5, when the shedding rate is lower than the preset value, the device lights up a green light to display and stops the power source output; when the shedding rate is higher than the preset value, the device lights up a red light to display and stops the power source output.

[0025] Through the above technical solution, the use of traffic lights as an indication method reduces the difficulty of determining the final result, reduces the usage threshold for operators, and further improves the efficiency of detection.

[0026] The beneficial effects of the present invention are:

[0027] 1. Create a test area on the construction section to improve the similarity between the test results and the final construction effect, thereby improving the effectiveness of the test results;

[0028] 2. The effective contact time between the rubber disc and the glass beads is increased by surface contact, while the rubber disc is prevented from rubbing against the coating layer, thus improving the accuracy of the test results;

[0029] 3. By identifying the power source of the rubber disc, the adhesion can be accurately quantified to avoid the deviation caused by subjective judgment;

[0030] 4. Use the electric spindle to directly obtain the load power, and the result is more accurate;

[0031] 5. Use strain gauges and variable frequency motors to obtain load power, which improves the applicability of the device and reduces the detection cost;

[0032] 6. Use a discharge chute to discharge the fallen glass beads out of the detection area through centrifugal force, reducing the interference of the fallen glass beads on the test results and further improving the accuracy of the test;

[0033] 7. The initial spindle load power is obtained by using a fixed speed and a fixed downward stroke. Through the change of the spindle load power, the shedding rate of the glass beads is obtained more intuitively and accurately, thereby obtaining accurate and effective adhesion test results. DETAILED DESCRIPTION

[0034] Embodiment 1:

[0035] This embodiment provides a method for detecting the adhesion performance of road marking paint and glass beads, comprising the following steps:

[0036] Step S1: Selecting the sections of the tunnel to be constructed, each with a length of one meter, at the entrances at both ends and the middle section of the tunnel to be constructed as the detection area;

[0037] It should be noted that its purpose is that after the construction of the inspection area, the reflective coating and glass beads can respectively observe the weather resistance of the climate and geological conditions of the two end entrances and the middle section, such as the day and night temperature difference between the sunny and shady sides of the mountain, the intensity of sunlight, the humidity and airflow in the middle section, etc.; compared with the laboratory production of samples for testing, the detection method of this embodiment directly adopts on-site testing under the construction environment, and the test results are more in line with the actual use status. Therefore, the obtained test results are more accurate and reliable, so that the adjustment of construction process parameters based on the test results is more practical.

[0038] Step S2: applying hot melt road marking paint and spreading glass beads in the inspection area according to the process parameters, and performing maintenance;

[0039] Step S3: After the maintenance is completed, a 1.5-ton to 2-ton engineering vehicle with rubber tires is used to roll over the inspection area multiple times; using an engineering vehicle with the weight of an ordinary family car for rolling can compact the glass beads and the coating layer and accelerate the separation of the part with poor adhesion performance.

[0040] Step S4: Use the end face of the rotating rubber disc to apply pressure to the upper surface of the glass beads on the marking paint in the detection area and then perform rotational friction. After connecting the rubber disc to the power source, make its end face face downward, apply pressure to make the rubber disc and the glass beads fully contact, keep the pressure level so that the rubber disc does not contact the paint layer, then start the power source, and the rotation of the rubber disc will only generate friction on the glass beads. The friction level is adjusted by the downward pressure and the rotation speed. The specific value is adjusted according to the construction requirements and is not further explained or limited here.

[0041] When in use, a downward force of F1 is applied to the end face of the rubber disc, and the rubber disc is rotated at a speed of R. At this time, the rubber disc will fully contact the glass beads according to the downward force of F1, and then when the speed R rotates, the total friction force U1 between the rubber disc and the glass beads will be fed back to the power source as a load power W1, W1 is the initial load power, when a single glass bead falls off under the action of the stable friction force U0 provided by F1 and R, the total friction force will be reduced to U2, and the load power will be reduced to W2, wherein U1=N*U0, N is the total number of glass beads, U2=(Nn)*U0, n is the number of glass beads that have fallen off, wherein the friction force U1 is proportional to the load power W1, and the friction force U2 is proportional to the load power W2, therefore W2 / W1=(Nn) / N, that is, the ratio of the load power can obtain the ratio of the remaining glass beads to the initial glass beads, and then obtain the shedding rate of the glass beads, thereby detecting the adhesion performance of the glass beads and the performance coating.

[0042] Through the above technical scheme, the area to be tested is made in the construction section to improve the similarity between the test result and the final construction effect, thereby improving the effectiveness of the test result; the end face of the rubber disk applies pressure to the surface of the glass beads in the area to be tested and then rotates and rubs them, thereby increasing the effective contact time between the rubber disk and the glass beads through surface contact, while avoiding the rubber disk from rubbing the coating layer, thereby improving the accuracy of the test result.

[0043] As a preferred implementation, in the above step S4, the power source driving the rubber disk to rotate has a power identification device, and the power source is an electric spindle, and the electric spindle obtains the load power of the electric spindle by using the monitoring function of the electric spindle driver.

[0044] Through the above technical solution, the adhesion can be accurately quantified by identifying the power source of the rubber disc, thereby avoiding the deviation caused by subjective judgment.

[0045] As a preferred embodiment, the end face of the rubber disc is provided with a plurality of radial discharge grooves, the width of the discharge grooves allows the glass beads that fall off from the marking paint to pass through, and when the glass beads fall off, they quickly enter the nearest discharge groove and fly outward under the action of centrifugal force, thereby preventing the fallen glass beads from continuing to remain between the end face of the rubber disc and the detection area and causing collision and wear on the remaining glass beads. At the same time, because the discharge grooves are provided, the end face of the rubber disc in contact with the detection area is no longer continuous, and each time the end face of the rubber disc contacts the glass beads, the friction changes from constant force to impact force, which increases the complexity of the test conditions for adhesion performance testing, thereby obtaining more comprehensive test results.

[0046] Through the above technical solution, a discharge chute is used to discharge the detached glass beads out of the detection area through centrifugal force, thereby reducing the interference of the detached glass beads on the detection results and further improving the accuracy of the detection.

[0047] As a preferred implementation, in the above step S5, by identifying the maximum load power of the power source after a preset time period, and comparing it with the initial load power of the power source, the shedding rate of the glass beads is calculated according to the value of the load power reduction.

[0048] Through the above technical scheme, a fixed rotation speed and a fixed downward stroke are used to obtain the initial spindle load power. When the glass beads fall off and are discharged from the detection area, the friction of the glass beads on the rubber disk is reduced, and then the spindle load power is reduced. Through the change of the spindle load power, the shedding rate of the glass beads is obtained more intuitively and accurately, thereby obtaining accurate and effective adhesion test results.

[0049] As a preferred implementation mode, in the above step S5, when the shedding rate is lower than the preset value, that is, the difference between the spindle load power after the preset time and the initial spindle load power is less than the difference preset in the memory, the device lights up a green light to display and stops the power source output; when the shedding rate is higher than the preset value, that is, the difference between the spindle load power after the preset time and the initial spindle load power is greater than the difference preset in the memory, the device lights up a red light to display and stops the power source output. Construction personnel no longer need to observe the surface state of the reflective mark on site and make subjective judgments, nor do they need to identify complex power parameters. Only the judgment of the traffic light is required to obtain whether the detection area meets the construction requirements, and then determine whether to change and optimize the construction process parameters.

[0050] Through the above technical solution, the use of traffic lights as an indication method reduces the difficulty of determining the final result, reduces the usage threshold for operators, and further improves the efficiency of detection.

[0051] Embodiment 2:

[0052] This embodiment provides a method for detecting the adhesion performance of marking paint and glass beads, which is substantially the same as that of Embodiment 1, except that the power source is a variable frequency motor, the main shaft of which is provided with a strain gauge, and the strain gauge outputs the load power of the main shaft.

[0053] The cost of attaching strain gauges to variable frequency motors is much lower than the cost of using electric spindles, which greatly reduces the difficulty of operating and repairing the equipment for construction personnel and saves various costs overall.

[0054] Through the above technical solution, strain gauges and variable frequency motors are used to obtain load power, which improves the applicability of the device and reduces the detection cost.

[0055] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A method for detecting the adhesion performance of road marking paint and glass beads, characterized in that: The following steps are involved: Step S1: Select the ground at both end entrances and the middle section of the tunnel to be constructed as the detection area; Step S2: applying hot melt road marking paint and spreading glass beads in the inspection area according to the process parameters, and performing maintenance; Step S3: After the maintenance is completed, the inspection area is rolled over several times using an engineering vehicle with rubber tires; Step S4: applying pressure to the upper surface of the glass beads on the road marking paint in the detection area by the end face of the rubber disc, the end face of the rubber disc is provided with a discharge groove, the width of the discharge groove allows the glass beads that fall off the road marking paint to pass through, and the rubber disc is driven by a power source to rotate and rub, and the rated friction force is applied to the glass beads by adjusting the pressure and the speed of the rubber disc. The adhesion performance of the glass beads and the road marking paint is detected by the amount of glass beads falling after being subjected to the rated friction force within a predetermined time. The power source has a power identification device, and after identifying the preset time period, the maximum load power of the power source is compared with the initial load power of the power source, and the shedding rate of the glass beads is calculated according to the value of the load power reduction.

2. The method for detecting the adhesion performance of road marking paint and glass beads according to claim 1, characterized in that: The power source is an electric spindle, and the electric spindle utilizes the monitoring function of the electric spindle driver to obtain the load power of the electric spindle.

3. The method for detecting the adhesion performance of road marking paint and glass beads according to claim 2, characterized in that: The power source is a variable frequency motor, a main shaft of the variable frequency motor is provided with a strain gauge, and the strain gauge outputs the load power of the main shaft.

4. The method for detecting the adhesion performance of road marking paint and glass beads according to claim 3, characterized in that: In step S4, when the shedding rate is lower than a preset value, the device lights up a green light to display and stops the power source output; when the shedding rate is higher than the preset value, the device lights up a red light to display and stops the power source output.