Road marking de-icing effect evaluation equipment and evaluation method

Abstract

The invention discloses an evaluation device and an evaluation method for the ice melting effect of road markings. The evaluation device comprises a test box, a controller base, a refrigeration module, an impact hammer, a power component and a marking mold. The marking mold is used for coating the markings, and an ice layer is formed in the test box after water is injected. The evaluation method comprises the following steps: preparing two groups of markings, brushing them into the marking molds respectively, placing the marking molds into the evaluation device to perform a hammer test on the ice layer, and after the ice layer broken by the hammering is cleaned, weighing the masses of the two marking molds after the test respectively, and calculating the ice melting efficiency of the experimental group of markings. The invention adopts a multiple hammering method to ensure the ice breaking effect of the hammering while avoiding damage to the marking caused by the hammering, and the obtained experimental data has small discreteness and high reliability. The evaluation method can intuitively reflect the ice melting efficiency of the road markings with added ice and snow melting materials, and has a guiding role in actual deicing operations.

Description

Technical Field

[0001] The invention relates to the technical field of road marking ice melting, and in particular to a road marking ice melting effect evaluation device and an evaluation method. Background Art

[0002] Road traffic markings refer to signs on the road surface that use lines, arrows, text, elevation marks, raised road signs and contour marks to convey traffic information such as guidance, restrictions and warnings to traffic participants. As a safety mark, road traffic markings are a very important "language" in road traffic, which can play a role in controlling and guiding traffic. Vivid and complete road markings can provide drivers and pedestrians with important traffic information, thereby effectively reducing traffic accidents and improving driving efficiency. In rainy and snowy weather in winter, the road will be covered with ice and snow. After the road markings are covered with ice and snow, the driver will not be able to recognize the traffic guidance signs, which will become a major hidden danger affecting traffic safety. Patent application number CN201610331390.X discloses a construction method for road traffic markings with automatic snow melting function. By adding chlorides to traditional hot-melt road traffic marking paint, a new type of road traffic marking is prepared. Through the diffusion and penetration of chlorides, the surface ice and snow can be automatically and timely melted to avoid being covered by ice and snow, ensuring the guidance and control of road traffic and reducing the occurrence of traffic accidents.

[0003] Patent application number CN202410287216.4 discloses a method for evaluating the ice-melting break time of road materials by induction heating. The relationship between the ice-melting break time and the heating power, heating distance, and loading force (shear force) is evaluated through a multivariate linear regression mathematical model, providing optimal working parameters for the road material induction heating ice-melting equipment, and determining the loading force range suitable for de-icing equipment for different road materials. This not only greatly reduces the energy consumption of ice melting, but also ensures that subsequent de-icing equipment will not damage the road surface.

[0004] In actual road deicing methods, chemical methods and mechanical methods are generally used in combination. Chemical methods are used to accelerate the melting of ice and snow, and mechanical methods are used to break the ice layer. Before the road deicing, deicing tests need to be conducted to make deicing evaluations. In order to achieve the best deicing effect without damaging the road markings, there is currently no specific road marking deicing effect evaluation method. For this reason, this application proposes a road marking deicing effect evaluation device and evaluation method. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a road marking ice melting effect evaluation device and evaluation method.

[0006] The present invention provides a road marking ice melting effect evaluation device, which comprises a test box, a controller base, a refrigeration module, an impact hammer, a power component and a road marking mold. The power component is connected to the impact hammer to drive the impact hammer to reciprocate up and down. The refrigeration module is arranged on the rear side of the test box to control the temperature in the test box. The road marking mold is used to coat the road marking, and an ice layer is formed in the test box after water is injected.

[0007] Preferably, the test box includes a bottom plate, a first side plate, a second side plate, a top plate and a door, the first side plate, the second side plate and the door are all provided with transparent windows, one side edge of the door is hinged to the first side plate, and the other side edge of the door is latched to the second side plate via a lock.

[0008] Preferably, the power assembly includes a transmission guide rail, a transmission chain, a transmission gear, a transmission belt and a power module. The transmission gear is provided with two and is movably connected to the lower end of the transmission guide rail. The power module is transmission-connected to one of the transmission gears. The transmission gear drives the transmission belt to rotate. One end of the transmission chain is fixedly connected to the impact hammer. The transmission chain slides along the transmission guide rail, and the other end of the transmission chain engages with the transmission belt. After the other end of the transmission chain extends out of the transmission guide rail, the transmission chain is separated from the transmission belt. After the transmission belt rotates one circle, the transmission chain engages with the transmission belt again. The power module drives the transmission belt to rotate continuously. The transmission chain and the transmission belt continuously engage and separate reciprocally, thereby driving the impact hammer to reciprocate up and down, so that the impact hammer cyclically reciprocates to perform a hammer test on the ice layer in the marking mold.

[0009] Preferably, a boss is fixed on the outer side of the transmission belt, and a concave groove is fixedly connected to the end of the transmission chain, and the concave groove matches the boss.

[0010] The present invention also provides a method for evaluating the ice melting effect of road markings, which comprises the following steps:

[0011] S1 prepares the control group marking line without ice and snow melting materials and the experimental group marking line with ice and snow melting materials, and brushes them into the marking molds respectively. Weigh the mass of the two marking molds as m 11 and m 21 ;

[0012] S2 puts two marking molds into the test box respectively, and injects a mass of m into the marking molds. w water, and start the refrigeration module until the water in the marking mold is completely condensed into an ice layer;

[0013] S3 starts the power assembly to drive the impact hammer to perform hammer test on the ice layers in the two marking molds in a reciprocating manner;

[0014] S4 cleans up the broken ice layer and weighs the mass m of the two marking molds after the test. 12 and m 22 ;

[0015] S5 calculates the ice melting efficiency η of the experimental group marking line:

[0016]

[0017] In the formula,

[0018] m 11 ——Mass of marking mold of control group before the test (g);

[0019] m 21 ——Mass of the marking mold of the experimental group before the test (g);

[0020] m 12 ——Mass of marking mold of control group after the test (g);

[0021] m 22 ——Mass of the marking mold of the experimental group after the test (g);

[0022] m w ——The mass of water added to the marking mold (g).

[0023] Preferably, the experimental group markings containing ice-melting materials in step S1 are divided into multiple groups according to the types and addition amounts of the ice-melting materials, and each group is individually compared with the control group markings not containing ice-melting materials.

[0024] Preferably, the hammering work W of the ice layer in the two marking molds in step S3 is the same, wherein:

[0025] W=0.5mv 2 (2)

[0026] Where m is the mass of the impact hammer and v is the falling velocity of the impact hammer.

[0027] Preferably, in step S3, the ice layer hammering work is calculated by measuring the potential energy change of the hammer before and after the impact according to the Charpy or Izod impact test, wherein:

[0028] W=n(mgh1-mgh2· (3)

[0029] Where m is the mass of the hammer, h1 is the height of the hammer before impact, h2 is the height of the hammer after impact, g is the acceleration of gravity, and n is the number of hammer blows.

[0030] Preferably, in step S3, the hammering power is 50 J / time to 100 J / time, and the number of hammering times is 20-40 times.

[0031] The beneficial effects of the present invention are:

[0032] The present invention paints markings on a marking mold and prepares an ice layer, and uses a power component to drive an impact hammer to cyclically and reciprocately perform a hammer test on the ice layer in the marking mold to achieve the purpose of destroying the ice layer. The invention adopts a multiple hammering method to ensure the ice-breaking effect of hammering while avoiding damage to the marking caused by hammering. The obtained experimental data has small discreteness and high reliability. In the evaluation method, the marking is divided into two groups according to whether it contains ice-melting materials. After the hammering test, the ice-melting efficiency is calculated, so that the ice-melting efficiency of the road marking with ice-melting materials added can be intuitively reflected, which has a guiding role in actual deicing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the road marking ice melting effect evaluation device of the present invention;

[0034] Figure 2 This is a schematic diagram of the overall structure of the road marking ice melting effect evaluation device of the present invention;

[0035] Figure 3 A schematic diagram showing a connection structure between an impact hammer and a power assembly of a road marking ice melting effect evaluation device according to the present invention from one viewing angle;

[0036] Figure 4 for Figure 3 Another perspective diagram of

[0037] Figure 5 for Figure 3 Schematic cross-sectional view of ;

[0038] Figure 6 for Figure 3 Schematic diagram of the decomposition.

[0039] In the figure: 1. top plate; 2. box door; 3. controller base; 4. transmission guide rail; 5. power module; 6. refrigeration module; 7. first side plate; 8. second side plate; 9. bottom plate; 10. marking mold; 11. impact hammer; 12. transmission chain; 13. transmission belt; 14. transmission gear; 15. boss; 16. concave groove. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. All directional indications in the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] like Figure 1 , 2 As shown, the present embodiment provides a road marking ice melting effect evaluation device, which includes a test box, a controller base 3, a refrigeration module 6, an impact hammer 11, a power assembly and a marking mold 10, the marking mold is used to coat the marking, and an ice layer is formed in the test box after water is injected, the test box includes a bottom plate 9, a first side plate 7, a second side plate 8, a top plate 1 and a box door 2, the first side plate 7, the second side plate 8 and the box door 2 are all equipped with transparent windows, one side of the box door 2 is hinged to the first side plate 7, and the other side of the box door 2 is connected to the second side plate 8 by a lock buckle for locking the box door 2, the refrigeration module 6 is arranged on the rear side of the test box, and can seal the rear side of the test box, and the refrigeration module 6 is used to control the temperature in the test box.

[0042] like Figure 1-6 As shown, the power assembly includes a transmission rail 4, a transmission chain 12, a transmission gear 14, a transmission belt 13 and a power module 5. The power module 5 adopts a motor. The transmission gear 14 is provided with two and is movably connected to the lower end of the transmission rail 4. The power module 5 is connected to one of the transmission gears 14. The transmission gear 14 drives the transmission belt 13 to rotate. One end of the transmission chain 12 is fixedly connected to the impact hammer 11. The transmission chain 12 slides along the transmission rail 4, and the other end of the transmission chain 12 is engaged with the transmission belt 13. The transmission chain 12 extends out of the other end of the transmission chain 12. After the guide rail 4, the transmission chain 12 is separated from the transmission belt 13. After the transmission belt 13 rotates one circle, the transmission chain 12 and the transmission belt 13 are engaged again, and the power module 5 drives the transmission belt 13 to rotate continuously. The transmission chain 12 and the transmission belt 13 are continuously engaged and separated back and forth, thereby driving the impact hammer 11 to reciprocate up and down, so that the impact hammer 11 reciprocates to perform a hammer test on the ice layer in the marking mold 10. A boss 15 is fixed to the outside of the transmission belt 13, and a concave groove 16 is fixedly connected to the end of the transmission chain 12, and the concave groove 16 matches the boss 15.

[0043] The power module 5 drives the transmission gear 14 to rotate, and then drives the transmission belt 13 to rotate. When the boss 15 on the transmission belt 13 rotates to the left, the concave groove 16 at the end of the transmission chain 12 also falls to this position, so that the boss 15 is engaged with the concave groove 16. Due to the limitation of the transmission guide rail 4 on the transmission chain 12, the concave groove 16 of the transmission chain 12 is always engaged with the boss 15 within the range of the transmission guide rail 4. After the transmission chain 12 moves to the right and extends out of the transmission guide rail 4, the transmission belt 13 drives the boss 15 to move downward, and the chain link at the end of the transmission chain 12 rotates upward, and the concave groove 16 separates from the boss 15. Under the action of gravity, the impact hammer 11 drives the chain to fall downward, and at the same time, the boss 15 on the transmission belt 13 rotates to the left again, so that the concave groove 16 is engaged with the boss 15 again, thereby completing the reciprocating up and down movement of the impact hammer 11.

[0044] The method of using the method is as follows: prepare a 3 mm thick marking line in the marking mold 10 according to "Road Marking Paint" (JT / T 280-2022), and weigh the mass of the marking mold 10; put the marking line mold 10 with the marking line into a test box, and inject 400 g of water into the marking mold 10, close the box door 2, set the test temperature to -5°C through the controller base 3, turn on the refrigeration module 6, and keep it in the -5°C test box for about 3 hours until the water in the marking mold 10 is completely condensed into an ice layer. During this period, the freezing of the ice layer is observed through the glass windows on the box door 2, the first side panel 7, and the second side panel 8. When the water in the marking mold 10 is completely condensed into an ice layer, the temperature of the test box is maintained at -5°C, the number of hammering is set to 20 times through the controller base 3, and the power module 5 is started to drive the impact hammer 11 to perform a hammering test on the ice layer in the marking mold 10 repeatedly. In order to ensure the ice-breaking effect of hammering and avoid damage to the marking line caused by hammering, the range of hammering power needs to be controlled within 50J / time~100J / time. After the hammering test, the test equipment is turned off, the marking mold 10 is taken out of the test box, and the ice layer broken by the hammering is cleaned up and the mass of the marking mold 10 is weighed.

[0045] Based on the above-mentioned road marking de-icing effect evaluation device, this example provides a road marking de-icing effect evaluation method, which includes the following steps:

[0046] S1 prepares a control group marking line without ice and snow melting materials and an experimental group marking line with ice and snow melting materials, and applies them to the marking mold 10 respectively. The mass of the two marking molds 10 is weighed as m 11 and m 21 , two groups were used for experimental comparison to evaluate that the markings with added snow-melting materials can improve the ice-melting efficiency. In order to evaluate the effects of different snow-melting materials and the amount of snow-melting materials added on the ice-melting efficiency, the experimental group markings containing snow-melting materials can also be divided into multiple groups according to the type and amount of snow-melting materials added, and each group is compared with the control group markings without snow-melting materials.

[0047] S2 puts two marking molds 10 into the test box respectively, and injects a mass of m into the marking molds 10. w and start the refrigeration module 6 until the water in the marking mold 10 is completely condensed into an ice layer;

[0048] S3 starts the power component, driving the impact hammer 11 to perform hammering test on the ice layer in the two marking molds 10 reciprocatingly. The hammering work is 50J / time~100J / time, and the number of hammering times is 20-40 times. In order to ensure that the impact effect of the impact hammer 11 on the ice layer is the same, the total hammering work of the control group and the experimental group is controlled to be the same, and the ice layer is impacted in a manner of "small single work and large number of work times". While ensuring the ice-breaking effect of hammering, damage to the marking line caused by hammering is avoided; not only that, the experimental data obtained by this "small amount and multiple times" hammering method has small discreteness and high reliability.

[0049] The efficiency of snowmelt marking is evaluated by using the same hammering work to break the ice mass on different marking lines. The hammering work principle formula is:

[0050] W=0.5mv 2 (2)

[0051] Wherein, m is the mass of the impact hammer 11, and v is the falling speed of the impact hammer 11.

[0052] In the Charpy or Izod impact test, the hammer work can also be calculated by measuring the change in potential energy of the hammer before and after the impact. The principle formula is:

[0053] W=n(mgh1-mgh2) (3)

[0054] Wherein, m is the mass of the impact hammer 11, h1 is the height of the impact hammer 11 before impact, h2 is the height of the impact hammer 11 after impact, g is the acceleration of gravity, and n is the number of hammer blows.

[0055] S4 cleans up the broken ice layer and weighs the mass m of the two marking molds 10 after the test. 12 and m 22 ;

[0056] S5 calculates the ice melting efficiency η of the experimental group marking line:

[0057]

[0058] In the formula,

[0059] m 11 ——Mass of marking mold of control group before the test (g);

[0060] m 21 ——Mass of the marking mold of the experimental group before the test (g);

[0061] m 12 ——Mass of marking mold of control group after the test (g);

[0062] m 22 ——Mass of the marking mold of the experimental group after the test (g);

[0063] m w ——The mass of water added to the marking mold (g).

[0064] The ice-melting efficiency η is calculated using the “relative ice-breaking mass by hammering” method, that is, the ratio of the ice-breaking mass by hammering in the experimental group to the ice-breaking mass by hammering in the control group. It can intuitively reflect the ice-melting efficiency of road markings with added ice-melting and snow-melting materials, and has a guiding role in actual deicing operations.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for evaluating the ice melting effect of road markings, characterized in that: A road marking de-icing effect evaluation device is used, and the road marking de-icing effect evaluation device includes a test box, a controller base, a refrigeration module, an impact hammer, a power assembly and a marking mold. The power assembly is connected to the impact hammer to drive the impact hammer to reciprocate up and down. The refrigeration module is arranged at the rear side of the test box to control the temperature in the test box. The marking mold is used to coat the marking, and an ice layer is formed in the test box after water is injected. The power assembly includes a transmission guide rail, a transmission chain, a transmission gear, a transmission belt and a power module. The transmission chain and the transmission belt continuously reciprocate and separate, thereby driving the impact hammer to reciprocate up and down. The steps include: S1 prepared the control group marking line without ice and snow melting materials and the experimental group marking line with ice and snow melting materials, and painted them into the marking molds respectively. The mass of the two marking molds was weighed. and ; S2 puts two marking molds into the test box respectively, and injects a mass of water and start the refrigeration module until the water in the marking mold is completely condensed into an ice layer; S3 starts the power assembly to drive the impact hammer to perform hammer test on the ice layers in the two marking molds in a reciprocating manner; S4 cleaned up the broken ice layer and weighed the mass of the two marking molds after the test. and ; S5 calculates the ice melting efficiency of the experimental group marking line : （1） In the formula, ——Mass of marking mold of control group before the test (g); ——Mass of the marking mold of the experimental group before the test (g); ——Mass of marking mold of control group after the test (g); ——Mass of the marking mold of the experimental group after the test (g); ——The mass of water added to the marking mold (g); In the step S1, the experimental group marking lines containing ice-melting materials are divided into multiple groups according to the types and addition amounts of the ice-melting materials, and each group is individually compared with the control group marking lines without ice-melting materials.

2. The method for evaluating the ice melting effect of road markings according to claim 1, characterized in that: The test box includes a bottom plate, a first side plate, a second side plate, a top plate and a box door, wherein the first side plate, the second side plate and the box door are all provided with transparent windows, one side edge of the box door is hinged to the first side plate, and the other side edge of the box door is locked to the second side plate via a lock.

3. The method for evaluating the ice melting effect of road markings according to claim 1, characterized in that: The transmission gears are provided with two and are movably connected with the lower end of the transmission guide rail. The power module is transmission-connected with one of the transmission gears. The transmission gear drives the transmission belt to rotate. One end of the transmission chain is fixedly connected with the impact hammer. The transmission chain slides along the transmission guide rail, and the other end of the transmission chain engages with the transmission belt. After the other end of the transmission chain extends out of the transmission guide rail, the transmission chain is separated from the transmission belt. After the transmission belt rotates one circle, the transmission chain engages with the transmission belt again. The power module drives the transmission belt to rotate continuously, so that the impact hammer reciprocates to perform a hammer test on the ice layer in the marking mold.

4. The method for evaluating the ice melting effect of road markings according to claim 3, characterized in that: A boss is fixed on the outer side of the transmission belt, and a concave groove is fixedly connected to the end of the transmission chain, and the concave groove matches the boss.

5. The method for evaluating the ice melting effect of road markings according to claim 1, characterized in that: The ice layer hammering work in the two marking molds in step S3 The same, among which, （2） In the formula, is the mass of the impact hammer, is the falling speed of the impact hammer.

6. The method for evaluating the ice melting effect of road markings according to claim 5, characterized in that: In step S3, the ice layer hammering work is calculated by measuring the potential energy change of the hammer before and after the impact according to the Charpy or Izod impact test, wherein: （3） In the formula, is the mass of the impact hammer, is the height of the impact hammer before impact, is the height of the impact hammer after impact, is the acceleration due to gravity, The number of hammer blows.

7. The method for evaluating the ice melting effect of road markings according to claim 1, characterized in that: The hammering work in step S3 is / times~ / times, the number of hammering is 20-40 times.

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