Pavement interlayer bonding strength testing equipment

Abstract

The utility model provides pavement interlayer bonding strength testing equipment which comprises a supporting plate, wherein the supporting plate is arranged at the bottom of a drawing instrument main body, an air heater is arranged on the supporting plate, a guide rail is arranged on the supporting plate, a sliding block is arranged on the guide rail in a sliding manner, an air injection pipe is arranged on one side of the sliding block, and a bent pipe is arranged at the lower end of the air injection pipe; according to the pavement interlayer bonding strength testing equipment provided by the utility model, after a test is finished, the air injection pipe can slide into the drawing head, then the power of the hot air blower is improved, high-temperature hot air is conveyed into the drawing head through the pipeline for a period of time, the drawing head is heated, and the components of an adhesive on the drawing head can be changed after being heated at high temperature, so that the bonding strength of the pavement interlayer is improved. Therefore, the strength of the adhesive is reduced, and workers can conveniently remove the adhesive on the drawing head.

Description

Technical Field

[0001] The utility model relates to the field of bonding strength testing, in particular to a device for testing the bonding strength between pavement layers. Background Art

[0002] The bond strength test between surface layers can evaluate the bond strength between pavement layers, so as to understand the adhesion and cohesion of the pavement. Bond strength is an important indicator to measure the bonding ability between pavement layers, which directly affects the overall performance and service life of the pavement. When conducting the test, first use a vernier ruler to test the diameter of the pulling head, accurate to 0.1mm, then clean the surface of the test point, apply adhesive to the bottom of the pulling head, and quickly adhere it to the surface of the test point on the pavement, then turn on the main body of the pulling instrument and perform the pulling test. The tensile rate of the pulling rod can be set to 25kPa / s. When setting other pulling speeds, indicate it in the test report. When the test is broken, read the maximum tensile force as the test result. After the test is broken, pay attention to observe the fracture surface, which should be noted in detail in the test report. Three points need to be tested at each location, and the distance between each measuring point is not less than 500mm, and the total distance is controlled within 2m. However, during the test, the adhesive is coated on the bottom of the pulling head and quickly adheres to the surface of the test point on the road surface. Then it is necessary to wait for the adhesive to dry naturally before the pulling test can be carried out, which takes a long time. At the same time, in the process of removing the adhesive coated on the bottom of the pulling head, due to the high viscosity of the adhesive, the staff usually use a shovel to directly scrape it off, which is time-consuming and labor-intensive to remove. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a pavement interlayer bonding strength testing device, which turns on a hot air blower to convey hot air to a curved pipe through a pipe, and by adjusting the height of a slider, adjusts the curved pipe to the joint where a drawing head and a test point surface are adhered, blows warm air to the joint, and accelerates the curing speed of an adhesive coated on the bottom of the drawing head. Furthermore, when the test is completed, the air injection pipe can be slid into the drawing head, and then the power of the hot air blower is increased, and high-temperature hot air is conveyed to the drawing head through a pipe for a period of time to heat the drawing head. The composition of the adhesive on the drawing head will change after high-temperature heating, thereby reducing the strength of the adhesive, making it convenient for staff to remove the adhesive on the drawing head.

[0004] In order to solve the above-mentioned problem that during the test, the adhesive is coated on the bottom of the pulling head and quickly adheres to the surface of the test point on the road surface, and then it is necessary to wait for the adhesive to dry naturally before the pulling test can be carried out, which takes a long time. At the same time, in the process of removing the adhesive coated on the bottom of the pulling head, due to the high viscosity of the adhesive, the staff usually use a shovel to directly scrape it off, which is time-consuming and laborious to remove. The utility model solves this problem through the following technical solution.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A road interlayer bonding strength testing device includes a support plate, which is installed at the bottom of a puller body. A hot air blower is provided on the support plate. A guide rail is provided on the support plate. A slider is slidably provided on the guide rail. An air injection pipe is provided on one side of the slider. A bent pipe is provided at the lower end of the air injection pipe.

[0007] Preferably, the hot air blower and the air injection pipe are connected via an air delivery pipe.

[0008] Preferably, the air injection pipe is provided with a solenoid valve, the solenoid valve is provided with a connecting pipe, and the other end of the connecting pipe is connected to the elbow.

[0009] Preferably, a rotatable screw is provided on the guide rail, and the screw is threadably connected to the slider.

[0010] Preferably, a power source is provided on the guide rail.

[0011] Preferably, a slidable pulling rod is provided at the bottom of the pulling instrument body, and a dynamometer is provided at the bottom of the pulling rod.

[0012] Preferably, a drawing head is provided at the bottom of the dynamometer, and a circulation groove is provided inside the drawing head.

[0013] Preferably, a handle is provided on the pulling instrument body, and a display screen is provided on the pulling instrument body.

[0014] Preferably, an adjusting column is provided at the bottom of the support plate, and an adjusting sleeve is threadedly connected to the outer surface of the adjusting column.

[0015] Preferably, a base is provided at the bottom of the adjustment sleeve, and a leveling bubble is provided on the main body of the pulling instrument.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a pavement interlayer bonding strength testing device, which starts a hot air blower to convey hot air to a bent pipe through a pipe, and by adjusting the height of a slider, the bent pipe is adjusted to the joint where a drawing head and a test point surface are adhered, and warm air is blown to the joint to accelerate the curing speed of the adhesive coated on the bottom of the drawing head. Furthermore, when the test is completed, the air injection pipe can be slid into the drawing head, and then the power of the hot air blower is increased, and high-temperature hot air is conveyed to the drawing head through a pipe for a period of time to heat the drawing head. The composition of the adhesive on the drawing head will change after high-temperature heating, thereby reducing the strength of the adhesive, making it convenient for staff to remove the adhesive on the drawing head. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of the pulling instrument of the utility model;

[0021] Figure 3 This is a schematic diagram of the support plate structure of the utility model;

[0022] Figure 4 It is a schematic diagram of the structure of the drawing head of the utility model;

[0023] Figure 5 This is a schematic diagram of the guide rail structure of the utility model;

[0024] Explanation of the figure numbers: 1. Display screen; 2. Leveling bubble; 3. Puller body; 4. Support plate; 5. Pulling rod; 6. Dynamometer; 7. Pulling head; 8. Handle; 9. Hot air blower; 10. Air duct; 11. Guide rail; 12. Solenoid valve; 13. Air injection duct; 14. Connecting pipe; 15. Elbow pipe; 16. Circulation groove; 17. Screw; 18. Power source; 19. Slider; 20. Adjustment column; 21. Adjustment sleeve; 22. Base. DETAILED DESCRIPTION

[0025] The utility model is described in further detail below in conjunction with the accompanying drawings.

[0026] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be used for other implementation schemes, variations, improvements, equivalent schemes, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0027] Those skilled in the art should understand that, in the disclosure of the present invention, the directions or positions indicated by the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the accompanying drawings, which are only simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0028] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity. Example

[0029] See also Figure 1-Figure 5 The utility model provides a pavement interlayer bonding strength testing device, including a support plate 4, the support plate 4 is mounted on the bottom of the puller body 3, a hot air blower 9 is arranged on the support plate 4, a guide rail 11 is arranged on the support plate 4, a slider 19 is slidably arranged on the guide rail 11, an air injection pipe 13 is arranged on one side of the slider 19, a bend pipe 15 is arranged at the lower end of the air injection pipe 13, the hot air blower 9 and the air injection pipe 13 are connected through an air delivery pipe 10, and the hot air generated by the hot air blower 9 can be transported, a solenoid valve 12 is arranged on the air injection pipe 13, and a connecting pipe 14 is arranged on the solenoid valve 12, the solenoid valve 12 can control the flow direction of the hot air blown out by the hot air blower 9, and the other end of the connecting pipe 14 is connected to the bend pipe 15.

[0030] A rotatable screw 17 is provided on the guide rail 11, and the screw 17 is threadedly connected to the slider 19. A power source 18 is provided on the guide rail 11. The power source 18 adopts a drive motor, and the output end of the drive motor is connected to the screw 17. Starting the drive motor can drive the screw 17 to rotate clockwise or counterclockwise. Under the action of the threaded connection between the screw 17 and the slider 19, the slider 19 can be driven to slide on the guide rail 11.

[0031] A slidable pulling rod 5 is provided at the bottom of the pulling instrument body 3, and a dynamometer 6 is provided at the bottom of the pulling rod 5. The dynamometer 6 can be used as an instrument for measuring force. It can measure the pulling force during pulling of the interlayer bonding strength of the pavement, and display the pulling force value on the display screen 1. A pulling head 7 is provided at the bottom of the dynamometer 6, and a circulation groove 16 is provided inside the pulling head 7. The air injection pipe 13 can be inserted into the pulling head 7 to centrally transport the hot air blown by the hot air blower 9 into the circulation groove 16 to heat the pulling head 7. The composition of the adhesive on the pulling head 7 will change due to high-temperature heating, thereby reducing the strength of the adhesive, which is convenient for the staff to remove the adhesive from the pulling head 7. A handle 8 is provided on the pulling instrument body 3, which is convenient for the staff to grab the handle 8 and then carry the pulling instrument body 3. A display screen 1 is provided on the pulling instrument body 3, and the display screen 1 can display the pulling force value of the dynamometer 6 and the movement speed of the pulling rod 5 in real time, so that the operator can accurately judge the test results and adjust the test parameters.

[0032] When the drawing head 7 is adhered to the surface of the test point, the hot air is turned on to convey the hot air to the elbow 15 through the pipe, and by adjusting the height of the slider 19, the elbow 15 is adjusted to the joint where the drawing head 7 and the surface of the test point are adhered, and warm air is blown to the joint to accelerate the curing speed of the adhesive coated on the bottom of the drawing head 7. Furthermore, when the test is completed, the air injection pipe 13 can be slid into the drawing head 7, and then the power of the hot air blower 9 can be increased to convey the high-temperature hot air to the drawing head 7 through the pipe for a period of time to heat the drawing head 7. The composition of the adhesive on the drawing head 7 will change after high-temperature heating, thereby reducing the strength of the adhesive, making it convenient for the staff to remove the adhesive on the drawing head 7.

[0033] An adjusting column 20 is provided at the bottom of the support plate 4, and an adjusting sleeve 21 is threadedly connected to the outer surface of the adjusting column 20. A base 22 is provided at the bottom of the adjusting sleeve 21. A leveling bubble 2 is provided on the puller body 3, and the adjusting sleeve 21 can rotate on the base 22. Under the threaded connection between the adjusting column 20 and the adjusting sleeve 21, the height of the adjusting column 20 can be adjusted. At the same time, in conjunction with the leveling bubble 2, the puller body 3 can be leveled to ensure the accuracy and reliability of the test results of the interlayer bonding strength of the pavement.

[0034] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments. Without departing from the principles, the embodiments of the present invention may be deformed or modified in any way.

Claims

1. A pavement interlayer bonding strength testing device, characterized in that: The invention comprises a support plate (4), wherein the support plate (4) is mounted on the bottom of a drawing instrument body (3), a hot air blower (9) is provided on the support plate (4), a guide rail (11) is provided on the support plate (4), a slider (19) is slidably provided on the guide rail (11), an air injection pipe (13) is provided on one side of the slider (19), and a bend pipe (15) is provided at the lower end of the air injection pipe (13).

2. The pavement interlayer bonding strength testing device according to claim 1 is characterized in that: The hot air blower (9) and the air injection pipe (13) are connected via an air delivery pipe (10).

3. The pavement interlayer bonding strength testing device according to claim 2 is characterized in that: The air injection pipe (13) is provided with a solenoid valve (12), the solenoid valve (12) is provided with a connecting pipe (14), and the other end of the connecting pipe (14) is connected to a bent pipe (15).

4. The pavement interlayer bonding strength testing device according to claim 3 is characterized in that: The guide rail (11) is provided with a rotatable screw rod (17), and the screw rod (17) is threadedly connected to the slider (19).

5. The pavement interlayer bonding strength testing device according to claim 4 is characterized in that: A power source (18) is provided on the guide rail (11).

6. The pavement interlayer bonding strength testing device according to claim 5 is characterized in that: A slidable pulling rod (5) is provided at the bottom of the pulling instrument body (3), and a dynamometer (6) is provided at the bottom of the pulling rod (5).

7. The pavement interlayer bonding strength testing device according to claim 6 is characterized in that: A drawing head (7) is provided at the bottom of the dynamometer (6), and a circulation groove (16) is provided inside the drawing head (7).

8. The pavement interlayer bonding strength testing device according to claim 7 is characterized in that: The pulling instrument body (3) is provided with a handle (8), and the pulling instrument body (3) is provided with a display screen (1).

9. The pavement interlayer bonding strength testing device according to claim 8, characterized in that: An adjustment column (20) is provided at the bottom of the support plate (4), and an adjustment sleeve (21) is threadedly connected to the outer surface of the adjustment column (20).

10. The pavement interlayer bonding strength testing device according to claim 9, characterized in that: A base (22) is provided at the bottom of the adjustment sleeve (21), and a leveling bubble (2) is provided on the main body (3) of the pulling instrument.

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