Portable rust-proof coating hardness rapid detection device

Abstract

The utility model relates to the technical field of coating detection, and disclose portable antirust coating hardness rapid detection device, including pen tube, the pen tube inner wall is fixed with support ring, the support ring top is fixed with compression spring, the compression spring top is fixed with the pressing block, the pressing block bottom is fixed with connecting rod, the connecting rod and support ring inner wall sliding connection, the connecting rod surface below is fixed with bearing, the bearing surface is fixed with operating cylinder, operating cylinder inner wall is fixed with three metal small piece, the pen tube bottom is fixed with three transparent observation window, the pen tube surface top is fixed with two roof boards, the connecting rod surface below is fixed with extension plate, the extension plate below is provided with return spring, return spring one end and extension plate surface fixed connection. This portable antirust coating hardness rapid detection device will traditional complex loading and rotating mechanism simplify for multiple core components, can complete the test fast.

Description

Technical Field

[0001] This utility model relates to the field of coating testing technology, specifically a portable rapid testing device for the hardness of anti-rust coatings. Background Technology

[0002] If the hardness of the anti-rust coating on metal components is too low, it is easily scratched by sand particles during transportation and installation. After long-term exposure, the cracks will expand, and moisture will seep in, causing pitting corrosion and sub-layer corrosion. Eventually, the entire piece will peel off, resulting in structural hazards and a sharp increase in maintenance costs. Therefore, hardness has become a mandatory on-site inspection indicator.

[0003] Existing coating hardness testers mostly adopt benchtop or handheld electric structures, including precision indenters, loading mechanisms, displacement sensors, and data processing units. They are bulky, expensive, and complex to operate, making them unsuitable for rapid on-site sampling inspections. Therefore, there is an urgent need for a portable hardness testing device with a minimalist structure, intuitive results, and no power supply required. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a portable rapid testing device for the hardness of anti-rust coatings, so as to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a portable rapid hardness testing device for anti-rust coatings, comprising a pen tube, a support ring fixed to the inner wall of the pen tube, a compression spring fixed to the top of the support ring, a pressure block fixed to the top of the compression spring, a connecting rod fixed to the bottom of the pressure block, the connecting rod being slidably connected to the inner wall of the support ring, a bearing fixed to the lower surface of the connecting rod, an operating cylinder fixed to the surface of the bearing, three small metal pieces fixed to the inner wall of the operating cylinder, three transparent observation windows fixed to the bottom of the pen tube, two top plates fixed to the upper surface of the pen tube, an extension plate fixed to the lower surface of the connecting rod, a return spring provided below the extension plate, one end of the return spring being fixedly connected to the surface of the extension plate, and the other end of the return spring being fixedly connected to the inner wall of the operating cylinder.

[0006] Preferably, the three metal pieces have hardness equivalents of 2H, 4H, and 6H pencil hardness, respectively.

[0007] Preferably, the surfaces of the three transparent observation windows are respectively marked with "soft / medium / hard", and the positions of the markings correspond to the positions of the metal pieces.

[0008] Preferably, the surface of the operating cylinder is provided with friction texture, and the surface of the pen tube is provided with anti-slip knurling.

[0009] Preferably, the return spring is a coil spring.

[0010] Preferably, the connecting rod surface is provided with an arc-shaped groove for limiting the maximum 90-degree rotation of the operating cylinder, and an anti-rotation plate is fixed to the inner wall of the operating cylinder, the anti-rotation plate being slidably connected to the inner wall of the arc-shaped groove.

[0011] Preferably, the connecting rod surface is fixed with a stop block for limiting the maximum upward movement range of the pressure block, and the stop block is located below the support ring.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are:

[0013] This invention simplifies the traditional complex hardness tester, which requires a power source, microscope, and weights, into a portable pen-shaped structure. All core components are integrated into the pen tube, which can be directly placed in a pocket or tool bag for random inspection anytime, anywhere. The anti-slip knurling and friction texture ensure reliable operation even when wearing gloves, and the coiled spring return eliminates the need for manual reset, greatly reducing labor intensity. This makes the hardness testing of anti-rust coatings in confined or harsh environments such as high altitudes, ship cabins, and the field safe, fast, and low-cost. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a cross-sectional three-dimensional structural diagram of the present invention;

[0016] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0017] Figure 4 This is a partial cross-sectional structural diagram of the present invention.

[0018] The components are: 1. Pen tube; 2. Support ring; 3. Compression spring; 4. Pressure block; 5. Connecting rod; 6. Bearing; 7. Operating cylinder; 8. Small metal piece; 9. Transparent observation window; 10. Top plate; 11. Extension plate; 12. Return spring; 13. Anti-rotation plate; 14. Arc groove; 15. Stop block. Detailed Implementation

[0019] The specific embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0020] Please see Figure 1-4A portable rapid hardness testing device for anti-rust coatings includes a pen tube 1, a support ring 2 fixed to the inner wall of the pen tube 1, a compression spring 3 fixed to the top of the support ring 2, a pressure block 4 fixed to the top of the compression spring 3, a connecting rod 5 fixed to the bottom of the pressure block 4, the connecting rod 5 being slidably connected to the inner wall of the support ring 2, a bearing 6 fixed to the lower surface of the connecting rod 5, an operating cylinder 7 fixed to the surface of the bearing 6, three small metal pieces 8 fixed to the inner wall of the operating cylinder 7, three transparent observation windows 9 fixed to the bottom of the pen tube 1, two top plates 10 fixed to the upper surface of the pen tube 1, an extension plate 11 fixed to the lower surface of the connecting rod 5, a return spring 12 set below the extension plate 11, one end of the return spring 12 being fixedly connected to the surface of the extension plate 11, and the other end of the return spring 12 being fixedly connected to the inner wall of the operating cylinder 7.

[0021] Through the above technical solution, when the user holds the pen tube 1 and presses the lower end of the pressure block 4 onto the surface of the anti-rust coating, the compression spring 3 is compressed, and the pressure block 4 drives the connecting rod 5 to move downward, causing the operating cylinder 7 to disengage from the pen tube 1. Then, the operator rotates the operating cylinder 7, and the three small metal pieces 8 fixed on the inner wall of the operating cylinder 7 successively scratch the coating. The depth of the scratch reflects the hardness, and the transparent observation window 9 displays the result in real time. The extension plate 11 cooperates with the return spring 12 to make the operating cylinder 7 automatically return to its original position. The top plate 10 helps the operator to contact it with their hand. The entire motion chain is simple and reliable, requiring no external power. This mechanism simplifies the traditional complex loading and rotation mechanism into several core components, which can quickly complete the test. The size is comparable to that of an ordinary marker pen, and the weight is extremely light, making it easy to carry and suitable for high-altitude, narrow, or outdoor environments.

[0022] The three small metal pieces have hardnesses of 2H, 4H, and 6H respectively, equivalent to pencil hardness.

[0023] Through the above technical solution, the hardness of the metal piece 8 corresponds to the pencil hardness equivalents of 2H, 4H, and 6H respectively. When the operating cylinder 7 rotates, the three pieces come into contact with the coating in turn, and the scratches are from shallow to deep. The hardness range of the coating can be determined by which piece shows an obvious scratch first. This principle follows the pencil hardness standard and does not require additional calibration. Users do not need to memorize complex values ​​and can directly compare the scratches to obtain the three-level conclusions of "below 2H, between 2H and 4H, and above 6H".

[0024] The three transparent observation windows 9 are marked with three types of labels: "soft / medium / hard", and the positions of the labels correspond to the positions of the small metal pieces 8.

[0025] Through the above technical solution, the transparent observation window 9 is printed with three markings: "soft / medium / hard". When the operating cylinder 7 stops rotating, the scratch appears directly below the window. Users only need to observe the corresponding markings to read the results. The window and the metal piece 8 are positioned one-to-one to avoid visual misalignment.

[0026] The surface of the operating cylinder 7 is provided with friction texture, and the surface of the pen tube 1 is provided with anti-slip knurling.

[0027] Through the above technical solution, the friction texture on the surface of the operating cylinder 7 and the anti-slip knurling on the surface of the pen tube 1 together provide sufficient friction to prevent slippage.

[0028] The return spring 12 is a coil spring.

[0029] Through the above technical solution, the return spring 12 adopts a coil spring structure, which has a small installation space and stable torque output. After the rotation is completed, it quickly pulls the operating cylinder 7 back to the initial position, ready for the next test.

[0030] The connecting rod 5 has an arc-shaped groove 14 on its surface to limit the maximum 90-degree rotation of the operating cylinder 7. An anti-rotation plate 13 is fixed to the inner wall of the operating cylinder 7, and the anti-rotation plate 13 is slidably connected to the inner wall of the arc-shaped groove 14.

[0031] Through the above technical solution, the arc groove 14 and the anti-rotation plate 13 work together to strictly limit the rotation angle of the operating cylinder 7 to within 90 degrees, ensuring that the three small metal pieces 8 pass through the coating in sequence and the scratch length is consistent in each test, avoiding excessive rotation that could damage the coating or cause data distortion.

[0032] A stop 15 is fixed to the surface of the connecting rod 5 to limit the maximum upward movement range of the pressure block 4. The stop 15 is located below the support ring 2.

[0033] With the above technical solution, the stop block 15 is located below the support ring 2, which limits the maximum height of the pressure block 4 to rebound upward, prevents the compression spring 3 from overstretching and becoming unstable, and at the same time prevents the connecting rod 5 from coming out of the support ring 2.

[0034] In use, the user holds the pen tube 1 with one hand, pressing the lower end vertically against the surface of the anti-rust coating being tested. The user then gently presses down on the pressure block 4 to compress the spring 3. The pressure block 4 pushes the connecting rod 5 downwards, disengaging the operating cylinder 7 from the pen tube 1. The operating cylinder 7 is then rotated, causing three small metal pieces 8 on its inner wall to sequentially scratch the coating, creating marks. The depth of the scratches is inversely proportional to the coating's hardness. The scratches are positioned directly opposite the transparent observation window 9, where the "soft / medium / hard" markings indicate which piece begins to show a noticeable scratch, thus providing a hardness rating. When the user releases the pressure block 4, the spring 3 rebounds, causing the connecting rod 5 to move upwards. Simultaneously, the return spring 12 drives the operating cylinder 7 to rotate 90 degrees. The anti-rotation plate 13 slides within the arc-shaped groove 14 and is limited by the stop block 15, completing one full cycle. The entire process requires no external power supply, calibration, or auxiliary tools.

[0035] Although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable rapid hardness testing device for anti-rust coatings, characterized in that: The device includes a pen tube (1), a support ring (2) fixed to the inner wall of the pen tube (1), a compression spring (3) fixed to the top of the support ring (2), a pressure block (4) fixed to the top of the compression spring (3), a connecting rod (5) fixed to the bottom of the pressure block (4), the connecting rod (5) being slidably connected to the inner wall of the support ring (2), a bearing (6) fixed below the surface of the connecting rod (5), an operating cylinder (7) fixed to the surface of the bearing (6), three small metal pieces (8) fixed to the inner wall of the operating cylinder (7), three transparent observation windows (9) fixed to the bottom of the pen tube (1), two top plates (10) fixed above the surface of the pen tube (1), an extension plate (11) fixed below the surface of the connecting rod (5), a return spring (12) provided below the extension plate (11), one end of the return spring (12) being fixedly connected to the surface of the extension plate (11), and the other end of the return spring (12) being fixedly connected to the inner wall of the operating cylinder (7).

2. The portable, quick hardness detection device for rust-proof coating according to claim 1, characterized in that: The three metal pieces (8) have hardnesses of 2H, 4H, and 6H respectively, which are equivalent to pencil hardness.

3. The portable, rapid hardness testing device for rust-preventive coating according to claim 1, characterized by: The three transparent observation windows (9) are marked with "soft / medium / hard" respectively, and the positions of the markings correspond to the positions of the metal pieces (8).

4. The portable rapid hardness testing device for anti-rust coatings according to claim 1, characterized in that: The surface of the operating cylinder (7) is provided with friction texture, and the surface of the pen tube (1) is provided with anti-slip knurling.

5. The portable, quick hardness detection device for rust-proof coating according to claim 1, characterized in that: The return spring (12) is a coil spring.

6. The portable, quick hardness detection device for rust-proof coating according to claim 1, characterized in that: The connecting rod (5) has an arc-shaped groove (14) on its surface to limit the maximum 90-degree rotation of the operating cylinder (7). An anti-rotation plate (13) is fixed to the inner wall of the operating cylinder (7), and the anti-rotation plate (13) is slidably connected to the inner wall of the arc-shaped groove (14).

7. The portable, quick hardness detection device for rust-proof coating according to claim 1, characterized in that: The connecting rod (5) has a stop (15) fixed on its surface to limit the maximum upward movement range of the pressure block (4), and the stop (15) is located below the support ring (2).

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