Device for detecting adhesive force of coating of pipe

Abstract

The utility model discloses a device for detecting the adhesive force of a pipe coating, which comprises a working platform and is characterized in that a clamping moving mechanism and a scribing tool are arranged on the working platform, the clamping moving mechanism comprises a sliding rail and a sliding seat matched with the sliding rail, a three-jaw chuck is arranged on the sliding seat, and the three-jaw chuck is connected with a rotating motor; the scribing tool comprises two side scribing plates and a lower scribing plate, and the two side scribing plates and the lower scribing plate form a tube body shape; the ends, facing the clamping moving mechanism, of the side scribing plate and the lower scribing plate are each provided with a circle of scribing needles, and the inner side faces of the side scribing plate and the lower scribing plate are each provided with a row of scribing needles. The surface of the tested pipe is engraved in a uniform speed, stable and uniformly stressed manner, so that latticed pipe coating adhesive force detection samples with the same size and uniform depth are obtained, personal errors are avoided, the test precision is improved, and potential safety hazards of personnel operation are eliminated.

Description

Technical Field

[0001] This utility model relates to metal cladding adhesion testing technology, and in particular to a pipe cladding coating adhesion testing device. Background Technology

[0002] The heat exchange efficiency and durability of refrigerator refrigeration pipes have always been important research directions in the refrigeration industry. To improve the service life of pipe materials, the use of coatings is an effective technical means. Coating the outside of the pipes can effectively reduce heat loss from the refrigerant within the pipes, improve refrigerator energy efficiency, enhance the pipes' corrosion resistance, and thus extend their service life. Research on coatings is of great significance for improving the performance of refrigerator refrigeration systems.

[0003] One important test for evaluating the quality of coatings is adhesion testing. For example, patent publication number CN218331159U discloses a coating adhesion testing device that uses a cross-cut method. Uniformly sized squares are drawn on the coating surface, then repeatedly brushed, and the adhesion is judged according to certain standards. Another example is patent publication number CN110967295A, which describes a positioning and guiding device for on-site cutting testing of metal structure coating adhesion. This method involves using a tool to cut from the coating surface to the metal substrate, then peeling it off with pressure-sensitive tape or using a tool to qualitatively evaluate the coating's bonding strength. These two methods are similar and are widely used in coating testing. However, currently, testing is done manually. In practice, the angle and force of the cutting tool cannot be guaranteed to be consistent, affecting the test results. Furthermore, cutting pipes with a handheld tool poses a safety hazard and the risk of injury. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems and provide a pipe coating adhesion testing device, which has the characteristics of avoiding human error, improving testing accuracy, eliminating safety hazards, and being easy to operate.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a pipe coating adhesion testing device, including a working platform, characterized in that a clamping and moving mechanism and a scribing tool are provided on the working platform, the clamping and moving mechanism includes a slide rail, a slide seat is provided in cooperation with the slide rail, a three-jaw chuck is provided on the slide seat, and the three-jaw chuck is connected to a rotary motor; the scribing tool includes two side scribing plates and one bottom scribing plate, the two side scribing plates and one bottom scribing plate forming a pipe shape.

[0006] The side scribing plate and the lower scribing plate are provided with a ring of scribing needles at one end facing the clamping and moving mechanism, and a row of scribing needles are provided on the inner side of the side scribing plate and the lower scribing plate, respectively.

[0007] In the aforementioned pipe coating adhesion testing device, preferably, a linear motor is provided between the slide block and the slide rail.

[0008] In the aforementioned pipe coating adhesion testing device, preferably, the center line of the pipe body formed by the two side scribbles and one bottom scribbles is concentric with the three-jaw chuck.

[0009] In the aforementioned pipe coating adhesion testing device, preferably, the scribing tool further includes supports symmetrically arranged on both sides of the lower scribing plate, with rocker arms on the supports and the side scribing plates fixed on the rocker arms.

[0010] In the aforementioned pipe coating adhesion testing device, preferably, the rocker arm is positioned on the support via a hinge, and the hinge is provided with a locking device.

[0011] In the aforementioned pipe coating adhesion testing device, preferably, the lower swatch height is adjustable; the side swatch is hinged to the rocker arm.

[0012] In the aforementioned pipe coating adhesion testing device, preferably, the lengths of the side scribbles and the bottom scribbles are greater than or equal to the length of the pipe being tested.

[0013] In the aforementioned pipe coating adhesion testing device, preferably, the working surface of the three-jaw chuck is provided with a rubber friction pad.

[0014] This technical solution mainly consists of a pipe clamping and moving mechanism and a pipe scribing tool, both located on the same horizontal plane of the work platform. The clamping and moving mechanism clamps the pipe and drives its rotation and movement. The scribing tool has a ring of scribing needles at its ends on the side and bottom scribing plates for axial scribing, and a row of scribing needles inside the side and bottom scribing plates for radial scribing. By driving the pipe under test to move and rotate at a uniform speed through the clamping and moving mechanism, the coating on the surface of the pipe is ultimately cut into a grid pattern of uniform size and depth. The pipe can then be removed for adhesion testing.

[0015] The tube-shaped centerline formed by the side and bottom scribing plates of this device is concentric with the three-jaw chuck, ensuring that the surface of the tube being tested is subjected to uniform scribing force.

[0016] Furthermore, the scribing tool uses components such as a support, a rocker arm, and a side scribing plate hinged to the rocker arm to adjust the positional relationship between the scribing needle and the surface of the test tube, adapting to scribing tests on test tubes of different diameters. The height of the lower scribing plate can also be adjusted to accommodate scribing of test tubes of different specifications.

[0017] The tube being tested in this device needs to have a certain effective length. The length of the scribing area formed by the side and bottom scribing plates is slightly larger than the length of the tube being tested, ensuring stability throughout the scribing process. In addition, the rubber friction pads on the working surface of the three-jaw chuck increase the friction between the chuck and the tube, maintaining the stability of the tube during the scribing process.

[0018] Compared with the prior art, the beneficial effects of this utility model are: by scratching the surface of the test tube at a uniform speed and with balanced force, a grid-like tube coating adhesion test sample of the same size and uniform depth is obtained, which avoids human error, improves test accuracy, and eliminates safety hazards for personnel operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the scratching tool part of this utility model.

[0021] Figure 3 yes Figure 2 Top view (turning).

[0022] Figure 4 This is a schematic diagram of the clamping and moving mechanism of this utility model.

[0023] Figure 5 This is an end view of the clamping and moving mechanism.

[0024] Figure 6 This is the electrical control diagram for the forward and backward movement of the clamping and moving mechanism of this utility model.

[0025] In the diagram: 1-Working platform, 2-Scrubbing tool, 201-Support, 202-Hinge, 203-Rock arm, 204-Side scribbling plate, 205-Lower scribbling plate, 3-Clamping and moving mechanism, 301-Slide rail, 302-Slide block, 303-Chuck head, 304-Three-jaw chuck, 4-Test tube. Detailed Implementation

[0026] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0027] like Figure 1 As shown in the figure, this embodiment is a pipe coating adhesion testing device, which includes a working platform 1, and a clamping and moving mechanism 3 and a scratching tool 2 are set on the working platform 1.

[0028] The clamping and moving mechanism 3 includes a slide rail 301, see [link / details]. Figure 4 , Figure 5A slide block 302 is provided to cooperate with the slide rail 301. A linear motor is provided between the slide block 302 and the slide rail 301, and the linear motor causes the slide block 302 to move back and forth in a straight line at a constant speed along the slide rail 301. A chuck head 303 is provided on the slide block 302, and the chuck head 303 is equipped with a three-jaw chuck 304 and a motor that drives the three-jaw chuck 304 to rotate. The clamping working surface of the three-jaw chuck 304 is provided with a layer of rubber friction pad, and the length of the three-jaw chuck 304 is greater than or equal to 50mm, so as to increase the friction force for clamping the test tube 4, ensure the stability between the test tube 4 and the three-jaw chuck 304, and the stability of the scratching process of the test tube 4 itself.

[0029] Scraping tools such as Figure 2 , Figure 3 As shown, the device includes two side scribing plates 204 and one bottom scribing plate 205. The two side scribing plates 204 and one bottom scribing plate 205 form a tube shape adapted to the outer diameter of the tube being tested 4. The center line of the tube shape formed by the two side scribing plates 204 and one bottom scribing plate 205 is concentric with the three-jaw chuck 304. A ring of scribes is provided on one end of the side scribing plates 204 and 205 facing the clamping and moving mechanism 3, and a row of scribes is provided on the inner surface of each side scribing plate 204 and 205. The length of the side scribing plates 204 and 205 is greater than or equal to the length of the tube being tested 4.

[0030] Furthermore, the scribing tool 2 also includes supports 201 symmetrically arranged on both sides of the lower scribing plate 205. A rocker arm 203 is mounted on each support 201, and the side scribing plate 204 is fixed to the rocker arm 203. The rocker arm 203 is positioned on the support 201 via a hinge 202. A locking device, consisting of a locking bolt and a locking nut, is provided at the hinge 202. The locking device can position the rocker arm 203 relative to the support 201 in its spatial working position.

[0031] Additionally, the height of the lower scribing plate 205 is adjustable to accommodate scribing of test tubes 4 of different specifications; the side scribing plate 204 is hinged to the rocker arm 203, and the hinged part is also equipped with a locking device. Both the lower scribing plate 205 and the side scribing plate 204 can be disassembled for maintenance and replacement of the scribing needle.

[0032] Figure 6 The diagram shows the circuit diagram of the forward and backward movement device controlling the clamping and moving mechanism 3. When switch A is closed, the linear motor rotates forward, and the slide 302 and the three-jaw chuck 304 move forward to the scribing tool 2 for scribing. When switch B is closed, the linear motor rotates in reverse, and the slide 302 drives the three-jaw chuck 304 back to its original position. The electrical control of this device uses conventional and simple existing technology, which will not be described in detail here.

[0033] During operation, the test tube 4 is clamped, and the side scribing plate 204 and the lower scribing plate 205 are released. The linear motor is started, and once the test tube 4 is fully within the working area of ​​the side scribing plate 204 and the lower scribing plate 205, the side scribing plate 204 and the lower scribing plate 205 are clamped. The rotary motor is then started, and a row of scribing needles on the inner sides of the side scribing plate 204 and the lower scribing plate 205 will scrub radially across the test tube 4. Once the radial scribing of the test tube 4 is complete, the rotary motor stops. Next, the linear motor is started to retract, and the scribing needles at the ends of the side scribing plate 204 and the lower scribing plate 205 will scrub axially across the test tube 4. Once the axial scribing of the test tube 4 is complete, the linear motor is stopped, and the slide 302 and the three-jaw chuck 304 return to their original positions. Finally, the coating on the surface of the test tube 4 is cut into grid-like test samples of the same size and depth. After scribing is complete, the test tube 4 is removed, and adhesion testing can be performed.

[0034] The above embodiments are illustrative of the present invention and not intended to limit it. Although the present invention has been described in conjunction with preferred embodiments, it should be understood that the present invention is not limited to the preferred embodiments. Those skilled in the art can make various equivalent modifications and substitutions to the technical solutions of the present invention based on its teachings. Therefore, the scope of the present invention should be defined by the claims, and all such equivalent modifications and substitutions fall within the protection scope of the present invention.

Claims

1. A device for testing the adhesion of pipe coatings, comprising a working platform (1), characterized in that: The work platform is provided with a clamping and moving mechanism (3) and a scribing tool (2). The clamping and moving mechanism includes a slide rail (301), a slide base (302) that cooperates with the slide rail, and a three-jaw chuck (304) on the slide base. The three-jaw chuck is connected to a rotary motor. The scribing tool includes two side scribing plates (204) and one bottom scribing plate (205). The two side scribing plates and one bottom scribing plate form a tube shape. The side scribing plate and the lower scribing plate are provided with a ring of scribing needles at one end facing the clamping and moving mechanism, and a row of scribing needles are provided on the inner side of the side scribing plate and the lower scribing plate, respectively.

2. The pipe coating adhesion testing device according to claim 1, characterized in that, A linear motor is provided between the slide block (302) and the slide rail (301).

3. The pipe coating adhesion testing device according to claim 1, characterized in that, The tubular centerline formed by the two side scribbles and one bottom scribbles is concentric with the three-jaw chuck (304).

4. The pipe coating adhesion testing device according to claim 1, characterized in that, The marking tool (2) also includes supports (201) symmetrically arranged on both sides of the lower marking plate (205), with a rocker arm (203) on the support and the side marking plate (204) fixed on the rocker arm.

5. The pipe coating adhesion testing device according to claim 4, characterized in that, The rocker arm (203) is positioned on the support (201) via a hinge (202), and a locking device is provided at the hinge.

6. A pipe coating adhesion testing device according to claim 4 or 5, characterized in that, The height of the lower slide (205) is adjustable; the side slide (204) is hinged to the rocker arm (203).

7. The pipe coating adhesion testing device according to claim 1, characterized in that, The lengths of the side slashes (204) and the underside slashes (205) are greater than or equal to the length of the tube being tested (4).

8. The pipe coating adhesion testing device according to claim 1, characterized in that, The three-jaw chuck (304) has a rubber friction pad on its clamping working surface.

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