A portable interlayer bond strength testing device

Abstract

This utility model relates to the field of road construction technology and discloses a portable interlayer bond strength testing device, including a base, a support frame on the base, an operating rod hinged to the top of the support frame, a spring force gauge connected to the operating rod via a pull rope, an upper clamp connected to the lower part of the spring force gauge, and a lower clamp on the base below the upper clamp. This utility model has a simple and portable structure, can meet the needs of field construction environments, has a low operating threshold, is easy to use, does not rely on electricity, and is highly practical.

Description

Technical Field

[0001] This utility model relates to the field of road construction technology, and in particular to a portable interlayer bond strength testing device. Background Technology

[0002] Traditional methods for testing the interlayer bond strength of double-layer surface treatments primarily rely on hydraulic pull-out testers or laboratory electronic tensile testing machines. Taking a hydraulic pull-out tester as an example, it uses a hydraulic pump to drive a clamp to apply a vertical tensile force to the interlayer sample, and then uses sensors to record the peak tensile force and calculate the bond strength. While such equipment performs well in standardized laboratory environments, it has significant limitations, such as harsh construction site environments, lack of effective power equipment and professional operators, making it unsuitable for field conditions.

[0003] Some manufacturers have attempted to achieve portability by simplifying the hydraulic module or adding battery power, but the weight is still greater than 20kg and the battery life is short (less than 4 hours), making it difficult to meet all-weather testing needs. Intelligent electronic tensile testing machines, while capable of accurately measuring peel strength, still require AC power and are bulky (requiring fixed installation), making on-site real-time testing impossible.

[0004] Therefore, there is an urgent need for a portable interlayer bond strength testing device that is simple in structure, easy to operate, does not rely on electricity, and can meet the requirements of field construction environments. Utility Model Content

[0005] The purpose of this invention is to provide a portable interlayer bond strength testing device. It has a simple and portable structure, can meet the needs of field construction environments, has a low operating threshold, is easy to use, does not rely on electricity, and is highly practical.

[0006] The present invention adopts the following technical solution:

[0007] A portable interlayer bond strength testing device includes a base, a support frame mounted on the base, an operating rod hinged to the top of the support frame, a spring force gauge connected to the operating rod via a pull rope, an upper clamp connected to the lower part of the spring force gauge, and a lower clamp mounted on the base below the upper clamp.

[0008] Preferably, both the upper clamp and the lower clamp are provided with a receiving cavity, and clamping plates are provided on the symmetrical sides of the receiving cavity. The clamping plates are movably connected to the screws provided on the upper clamp and the lower clamp.

[0009] Preferably, the opposing end faces of the clamps are provided with serrated stripes.

[0010] Preferably, sealing plates are provided in the adjacent gaps and at the top of the support frame, wherein the sealing plate located on one side of the support frame is openable.

[0011] Preferably, all of the sealing plates are transparent.

[0012] Preferably, a receiving groove is provided on one side of the bottom of the base, and a trimming plate is slidably disposed in the receiving groove, and a trimming groove is provided on the trimming plate.

[0013] Preferably, an adjusting plate is slidably disposed on the trimming plate, and the adjusting plate and the baffle at the end of the trimming plate form the trimming groove.

[0014] Preferably, the trimming plate is provided with scale lines.

[0015] Preferably, the operating lever is provided with a conversion scale.

[0016] Preferably, the end of the operating lever is provided with a rubber sleeve.

[0017] Compared with the prior art, the advantages of this utility model are: by utilizing the principle of leverage mechanics, the peeling force value can be directly read by the operator manually applying external force, combined with the spring force gauge. The bonding strength can be quickly calculated by the preset sample contact area. No electronic components are required throughout the process, which provides convenience for construction environments without power in the field. At the same time, the device has a simple structure, is easy to carry, and can be manufactured without precision processing, reducing the cost of use and maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0019] Figure 2 This is an internal structure diagram of an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the structure of the clamp in the embodiment of this application. Detailed Implementation

[0021] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments:

[0022] like Figures 1 to 3As shown, the portable interlayer bond strength testing device of this utility model includes a base 1, a support frame 2 mounted on the base 1, an operating rod 3 hinged to the top of the support frame 2, and a rubber sleeve at the end of the operating rod 3 away from the base 1 for the operator's hand grip. The operating rod 3 is connected to a spring force gauge 4 via a pull rope 17. An upper clamp 5 is connected to the lower part of the spring force gauge 4, and a lower clamp 6 is mounted on the base 1 below the upper clamp 5. In use, the bottom of the sample is clamped in the lower clamp 6, and the top is clamped in the upper clamp 5. Then, the operating rod 3 is lowered, and the value on the spring force gauge 4 is read when the sample peels off. The bond strength value can then be calculated using the formula M=F / A. The device is easy to operate, has a simple structure, requires no electricity for testing, and is highly practical. In the above formula, F is the value measured by the spring force gauge 4, and A is the bonding area of ​​the sample.

[0023] Furthermore, both the upper clamp 5 and the lower clamp 6 are provided with receiving cavities 7, and clamping plates 8 are provided on the symmetrical sides of the receiving cavities 7. The clamping plates 8 are movably connected to the screws 9 provided on the upper clamp 5 and the lower clamp 6. By rotating the screws 9 to adjust the distance between the two clamping plates 8, the upper and lower layers of the sample can be clamped and fixed in the upper clamp 5 and the lower clamp 6 respectively, so as to ensure that the sample will not fall out of the upper clamp 5 and / or the lower clamp 6 when force is applied to the operating rod 3, thus ensuring the smooth progress of the measurement. Preferably, the opposing end faces of the two clamping plates 8 in the upper clamp 5 and the lower clamp 6 are provided with serrated stripes to increase the friction with the sample and ensure the stability of the connection between the sample and the upper clamp 5 and the lower clamp 6 during the test.

[0024] Furthermore, sealing plates 10 are provided in the adjacent gaps and at the top of the support frame 2. The sealing plate 10 on one side of the support frame 2 can be opened to facilitate the placement and removal of samples, and the sealing plate 10 at the top has a through hole for the pull rope to pass through. The sealing plates 10 prevent interference from external factors and improve the accuracy of the test. Preferably, the sealing plates 10 are all transparent, specifically transparent acrylic plates, so that data can be read without opening the sealing plates 10.

[0025] Furthermore, a receiving groove 11 is provided on one side of the bottom of the base 1, and a trimming plate 12 is slidably disposed in the receiving groove 11. A trimming groove 13 is provided on the trimming plate 12. The trimming groove 13 allows the cut sample to be placed inside and aligned with its edge to complete the trimming of the sample, ensuring that the sample area contacted by the upper clamp 5 and the lower clamp 6 is uniform. Preferably, a sliding groove 14 is provided along the upper length of the trimming plate 12, and an adjusting plate 15 is slidably disposed in the sliding groove 14. A slider is provided at the bottom of the adjusting plate 15 and is located in the sliding groove 14. The adjusting plate 15 and the baffle at the end of the trimming plate 12 form the trimming groove 13. The sliding arrangement of the adjusting plate 15 can meet the cutting operation of samples of different sizes, expanding the application scope of this utility model. In addition, the trimming plate 12 is provided with scale lines to intuitively understand the size of the trimmed sample and to provide a reference for the trimming of the sample.

[0026] Furthermore, the operating lever 3 is also equipped with a conversion scale 16, on which the bonding strength corresponding to the preset sample area is marked. For example, for a square sample with a size of 50mm, the corresponding area is 25cm², and the corresponding bonding strength is measured by the formula M=F / A and recorded on the conversion scale 16. This facilitates the comparison of the values ​​measured for samples of this area, thereby understanding whether the bonding strength of the sample meets the standard.

[0027] This utility model is used according to the following steps:

[0028] Sample preparation: Use a hollow drill to take interlayer samples on site, place them in the positioning slot and trim the edges to meet the corresponding dimensions marked on the conversion scale 16;

[0029] Clamping and fixing: Press the lower layer of the sample into the serrated plate of the lower clamp 6, and tighten the screw 9 of the upper clamp 5 to lock the upper layer;

[0030] Applying tension: Slowly press down the operating lever 3 to amplify the operating force through the leverage ratio (1:4). The pointer of the spring force gauge 4 deflects as the tension increases. When applying tension, the device can be fixed as needed to ensure the stability of the device during the test.

[0031] Data reading: When the sample is peeled off, the position where the pointer stops corresponds to the bonding strength value on the dial (e.g., for a sample with a tensile force of 2.5kN and an area of ​​19.6cm², the corresponding bonding strength is 2.5 / 19.6≈0.127MPa).

[0032] Reset test: Replace the sample and repeat the operation.

Claims

1. A portable interlayer bond strength testing device, characterized in that: The device includes a base, on which a support frame is mounted. An operating rod is hinged to the top of the support frame. The operating rod is connected to a spring force gauge via a pull rope. An upper clamp is connected to the lower part of the spring force gauge. A lower clamp is mounted on the base below the upper clamp.

2. The portable interlayer bond strength testing device according to claim 1, characterized in that: Both the upper clamp and the lower clamp are provided with a receiving cavity. Clamping plates are provided on the symmetrical sides of the receiving cavity. The clamping plates are movably connected to the screws provided on the upper clamp and the lower clamp.

3. The portable interlayer bond strength testing device according to claim 2, characterized in that: The opposing end faces of the clamps are provided with serrated stripes.

4. The portable interlayer bond strength testing device according to claim 1, characterized in that: Sealing plates are provided in the adjacent gaps and on the top of the support frame, wherein the sealing plate located on one side of the support frame can be opened.

5. The portable interlayer bond strength testing device according to claim 4, characterized in that: All of the sealing plates are transparent.

6. The portable interlayer bond strength testing device according to claim 1, characterized in that: The base has a receiving groove on one side of its bottom, and a trimming plate is slidably disposed in the receiving groove. The trimming plate is provided with a trimming groove.

7. The portable interlayer bond strength testing device according to claim 6, characterized in that: An adjusting plate is slidably disposed on the trimming plate, and the adjusting plate and the baffle at the end of the trimming plate form the trimming groove.

8. The portable interlayer bond strength testing device according to claim 6, characterized in that: The trimming plate is provided with scale lines.

9. The portable interlayer bond strength testing device according to claim 1, characterized in that: The control lever is equipped with a conversion scale.

10. The portable interlayer bond strength testing device according to claim 1, characterized in that: The end of the operating lever is provided with a rubber sleeve.

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