Drawing mechanism of anticorrosive coating detection device

Abstract

The utility model provides a drawing mechanism of an anticorrosive coating detection device, belongs to the technical field of anticorrosive coating detection, and is used for solving the problems that a drawing device is large in size and inconvenient to operate when a drawing method is used for evaluating the protection effect of a coating on a base material in the prior art. The drawing mechanism of the anticorrosive coating detection device comprises a power shaft, a drawing wheel and a pressing claw, the power shaft is rotationally arranged on the machine body and is perpendicular to the direction of the measuring rod; the pulling-out wheel and the pressing claw are fixedly connected to the power shaft; the pulling-out wheel is lower than the stress structure, and the distance from the outer edge of the pulling-out wheel to the axis of the power shaft is gradually increased in the first rotating direction of the circumference of the power shaft. When the power shaft rotates in the direction opposite to the first rotating direction, the pressing claw presses the stress structure, and the pulling-out wheel is away from the stress structure. When the power shaft rotates in the first rotating direction, the pressing claw is far away from the stress structure, and the pulling-out wheel jacks up the stress structure. The device has the characteristics of small size and convenience in operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-corrosion coating detection, and particularly relates to a pulling mechanism of an anti-corrosion coating detection device. Background Art

[0002] Anti-corrosion coating detection refers to the detection of the anti-corrosion performance of the protective layer on the surface of the base material, such as epoxy-based primers and intermediate paints, polyurethane topcoats, etc., which are commonly selected for the surface of light buoy steels. Among them, epoxy-based paints have strong adhesion, are water-resistant, heat-resistant, wear-resistant, and impact-resistant; polyurethane topcoats have good weather resistance and can further improve the anti-corrosion effect. In order to ensure that the coating can effectively protect the light buoy steel, it is necessary to detect the adhesion of the coating on the surface of the steel.

[0003] Common detection methods include the pull-out method, which evaluates the adhesion of the coating by applying a pulling force to separate the coating from the base material. In the prior art, generally, a pull-out rod is adhered to the surface of the base material with a coating, and then the pull-out rod is pulled, and the protection effect of the coating on the base material is evaluated by the magnitude of the pulling force when the coating is separated from the base material. However, in the prior art, when performing related operations, there are problems such as large volume and inconvenient operation of the pull-out device. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a pulling mechanism of an anti-corrosion coating detection device, which is used to solve the problems of large volume and inconvenient operation of the pull-out device in the prior art when evaluating the protection effect of the coating on the base material by the pull-out method.

[0005] To achieve the above purpose and other related purposes, the present utility model provides a pulling mechanism of an anti-corrosion coating detection device, which is used to pull or press a measuring rod with a stress structure, including:

[0006] A power shaft, a pulling wheel, and a pressing claw;

[0007] The power shaft is rotatably arranged on the machine body and is perpendicular to the direction of the measuring rod;

[0008] Both the pulling wheel and the pressing claw are fixedly connected to the power shaft;

[0009] The pulling wheel is lower than the stress structure, and along the first rotation direction of the circumference of the power shaft on the pulling wheel, the distance from the outer edge of the pulling wheel to the axis of the power shaft gradually increases;

[0010] Initially, the pressing claw exceeds the stress structure;

[0011] When the power shaft rotates in the reverse direction of the first rotation direction, the pressing claw presses the stress structure, and the pulling wheel moves away from the stress structure;

[0012] When the power shaft rotates along the first rotation direction, the pressing claw moves away from the force-bearing structure, and the pulling wheel lifts up the force-bearing structure.

[0013] Optionally, there are two pulling wheels and two pressing claws, which are respectively arranged on both sides of the power shaft and are symmetrical about the axis plane of the measuring rod.

[0014] Optionally, it further includes another power shaft, two pulling wheels and two clamping claws which are assembled in the same way with each other, the two power shafts are arranged in parallel and the corresponding pulling wheels and clamping claws on the two power shafts are arranged symmetrically; a rectangle is formed with the four pulling wheels or clamping claws as vertices, and the center of the rectangle coincides with the axis of the measuring rod; the two power shafts are connected by a synchronous transmission structure and rotate in opposite directions.

[0015] Optionally, the synchronous transmission structure is a transmission gear set arranged in the middle area of ​​the two power shafts, and the power shafts are provided with shaft gears. The shaft gears and the transmission gear set are meshed to achieve opposite rotation directions of the two power shafts.

[0016] Optionally, both ends of the two power shafts are transmission connected via the synchronous transmission structure.

[0017] Optionally, the power shaft is driven by a first motor.

[0018] Optionally, it further comprises a tension detection unit, one end of which is connected to the machine body, and the other end of which is provided with a hook for being mounted on the structure of the measuring rod.

[0019] Optionally, the tension detection unit includes a detection body and a telescopic shaft;

[0020] The telescopic shaft is threadedly matched with the body, the upper end of the telescopic shaft is beyond the body and is rotatably connected with a buckle, and the telescopic amount of the telescopic shaft is controlled by the rotation amount;

[0021] The two sides of the detection body are hook structures, one side of which is mounted on the ring buckle, and the other side is used to be mounted on the structure of the measuring rod.

[0022] Optionally, the telescopic shaft is connected to the power of a second motor, and the second motor drives the telescopic shaft to rotate and adjust the telescopic amount of the telescopic shaft relative to the surface of the body.

[0023] Optionally, the second motor is slidably connected to the body and a sliding direction is consistent with a telescopic direction of the telescopic shaft.

[0024] As described above, the pulling mechanism of the anti-corrosion coating detection device of the utility model has at least the following beneficial effects:

[0025] Small in size and convenient to operate. By changing the rotation direction of the power shaft, the pressing claws can be controlled to press the measuring rod against the target surface to be measured, so that the adhesive at the end of the measuring rod can reliably adhere to the target surface to be measured; or the pulling wheel can be controlled to pull the measuring rod away from the target surface in the reverse direction to evaluate the adhesion of the coating on the target surface. The greater the pulling force when the coating is separated from the substrate, the greater the adhesion of the coating, and the better the protective effect of the coating on the substrate. Brief Description of the Drawings

[0026] Figure 1 It shows the simplest state schematic diagram of the present utility model.

[0027] Figure 2 It shows the schematic diagram of the balanced pull-out state of the present utility model.

[0028] Figure 3 It shows the schematic diagram of the pull-out mechanism of the present utility model installed on the machine body.

[0029] Figure 4 It shows the schematic diagram of the measuring rod supporting the pull-out mechanism of the present utility model.

[0030] Figure 5 It shows the schematic diagram of the pressing claw pressing down the measuring rod of the present utility model.

[0031] Figure 6 It shows the schematic diagram of the pull-out wheel pulling out the measuring rod of the present utility model.

[0032] Figure 7 It shows the schematic diagram of both the pull-out mechanism and the measuring rod of the present utility model installed on the machine body.

[0033] Figure 8 It shows the installation schematic diagram of the telescopic shaft of the present utility model.

[0034] Wherein: machine body 1, measuring rod 2, stress structure 22, power shaft 30, pull-out wheel 31, pressing claw 32, transmission gear set 33, detection body 40, hook structure 401, telescopic shaft 41, loop 411, second motor 5. Detailed Description of the Preferred Embodiments

[0035] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand the other advantages and effects of the present utility model from the content disclosed in this specification.

[0036] Please refer to Figures 1 to 8It should be noted that the structures, proportions, sizes, etc. shown in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the implementation scope of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0037] The following various embodiments are only for illustration purposes. Combinations can be made between the various embodiments, and it is not limited to the content shown in the following single embodiment.

[0038] Please refer to this embodiment Figure 1 , and it can be combined with Figures 3 to 8 An embodiment of the pulling mechanism of the anti-corrosion coating detection device provided by the present utility model is used to pull or press the measuring rod 2 having a force-bearing structure 22, and includes:

[0039] A power shaft 30, a pulling wheel 31, and a pressing claw 32;

[0040] The power shaft 30 is rotatably arranged on the machine body 1 and is perpendicular to the direction of the measuring rod 2;

[0041] Both the pulling wheel 31 and the pressing claw 32 are fixedly connected to the power shaft 30;

[0042] The pulling wheel 31 is lower than the force-bearing structure 22. Along the first rotation direction of the circumference of the power shaft 30 on the pulling wheel 31, the distance from the outer edge of the pulling wheel 31 to the axis of the power shaft 30 gradually increases. It can be understood that the pulling wheel 31 is eccentrically fixedly connected to the power shaft 30;

[0043] Initially, the pressing claw 32 exceeds the force-bearing structure 22;

[0044] When the power shaft 30 rotates in the reverse direction of the first rotation direction, the pressing claw 32 presses the force-bearing structure 22, and the pulling wheel 31 moves away from the force-bearing structure 22; when the power shaft 30 rotates in the first rotation direction, the pressing claw 32 moves away from the force-bearing structure 22, and the pulling wheel 31 jacks up the force-bearing structure 22. That is, the clockwise and counterclockwise rotations of the power shaft will respectively form the pulling or pressing effects on the measuring rod.

[0045] In the above embodiments, the power shaft 30 is rotatably mounted on the machine body. A through hole is provided on the machine body. The measuring rod 2 is slidably disposed in the through hole. The head of the measuring rod abuts against the target surface to be measured, and a force-bearing structure 22 is provided at the tail of the measuring rod. The pulling-out wheel 31 and the pressing claw 32 (the force application points of the force-bearing structure on the measuring rod) of the power shaft 30 are respectively located on both sides of the force-bearing structure 22. When the power shaft 30 rotates, the pulling-out wheel 31 and the pressing claw 32 on both sides thereof respectively act on both sides of the force-bearing structure 22.

[0046] When the power shaft rotates in one direction (the first rotation direction), the pulling-out wheel 31 jacks up the force-bearing structure 22. By using the gradually increasing outer diameter of the pulling-out wheel 31, the force-bearing structure 22 (the measuring rod) moves away from the target surface to be measured, and the target surface to be measured and the head of the measuring rod are connected by an adhesive, thereby forming a tensile force on the surface of the target surface to be measured. According to the magnitude of the tensile force when the coating on the target surface to be measured is pulled off, the coating performance is evaluated.

[0047] When the power shaft rotates in the other direction, the pressing claw 32 presses the force-bearing structure 22, and the measuring rod moves towards the target surface to be measured to form extrusion, so that the adhesive at the end of the measuring rod adheres to the target surface to be measured reliably, facilitating the pull-out test.

[0048] In the above embodiments, the matters that should be noted in the selection of the bonding substance, that is, the adhesive, include: pay attention to selecting a suitable adhesive. In order to test the tensile properties of the coating, the cohesive force and adhesiveness of the adhesive should be greater than those of the coating under test. The adhesive should be screened in advance to determine its applicability. The appropriate adhesive and its unmixed components (if applicable) should cause almost no or no detectable change to the coating under test during the period equivalent to the curing time of the adhesive when in contact with the coating. Select the adhesive that can give the maximum result (usually manifested as the adhesion failure between the coating and the substrate). In most cases, cyanoacrylate, two-component solvent-free epoxy, and peroxide-catalyzed polyester adhesives are applicable. Under test conditions with higher humidity, the curing time of the adhesive should be as short as possible, and it is best to use a two-component fast-drying epoxy adhesive. During implementation, when the adhesive fails before the coating, it indicates that the cohesive force and adhesiveness of the adhesive may be less than those of the coating under test and the surface of the object, and more effective results may be obtained by selecting other types of adhesives.

[0049] A brief description of the working process related to this device is as follows:

[0050] Preparation step: Apply the adhesive to the end of the measuring rod, then install the measuring rod back into the machine body, and press the measuring rod against the surface of the object to be measured by this device, and wait for the adhesive to cure and bond stably;

[0051] Test steps: The measuring rod is pulled backward along the surface of the object to be measured by this device, and the magnitude of the pulling force is recorded. The pulling stops when the pulling force reaches the set value, or when the surface coating of the object to be measured is peeled off.

[0052] Evaluation steps: Qualitative and / or quantitative evaluation of the anti-corrosion coating is carried out. Among them, the qualitative evaluation is: when the pulling force reaches the set value and the anti-corrosion coating on the surface of the object to be measured is not pulled apart, it is qualified and the pulling force test is not continued; the quantitative evaluation is: the pulling force when the anti-corrosion coating on the surface of the object to be measured is pulled apart is the performance index of the anti-corrosion coating, which is recorded as the maximum tensile capacity of the coating or called the adhesion force.

[0053] Subsequent steps: After the test is completed, the surface of the object to be measured is inspected and the residual glue is cleaned, and the residual glue on the surface of the measuring rod is also cleaned.

[0054] Furthermore, there are two pulling wheels 31 and two pressing claws 32 respectively, and they are respectively arranged on both sides of the power shaft 30 and are symmetric about the axis plane of the measuring rod 2. That is to say, when the two pulling wheels 31 or pressing claws 32 apply a pulling force or a pressing force to the measuring rod 2, the acting points of the forces are symmetric about the axis of the measuring rod 2, so as to ensure the balanced force of the measuring rod 2, and further ensure the balanced pulling force of the measuring rod 2 on the coating of the target surface to be measured.

[0055] Even further, as Figure 2 shown, it further includes another power shaft 30, two pulling wheels 31 and two pressing claws 32, and they are assembled in the same way with each other. The two power shafts 30 are arranged in parallel, and the corresponding pulling wheels 31 and pressing claws 32 on the two power shafts 30 are symmetrically arranged; a rectangle is formed with the four pulling wheels 31 or pressing claws 32 as vertices, and the center of the rectangle coincides with the axis of the measuring rod 2; the two power shafts 30 are connected by a synchronous transmission structure and rotate in opposite directions. This embodiment further ensures the balanced force of the measuring rod 2, further ensures the balanced pulling force of the measuring rod 2 on the coating of the target surface to be measured, thereby improving the accuracy of the measurement results.

[0056] This embodiment can refer to Figure 2 and Figure 3 , the synchronous transmission structure is a transmission gear set 33 arranged in the middle area between the two power shafts 30. Shaft gears are arranged on the power shafts 30, and the shaft gears are meshed with the transmission gear set 33 to realize the opposite rotation directions of the two power shafts 30. To achieve the above purpose, generally the number of gears in the transmission gear set 33 needs to be even, but an overly long transmission chain will affect the transmission efficiency and stability. Set Figure 2The reason for making the rotation directions opposite is that in the previous embodiment, the two power shafts and the extraction wheels 31 and the pressing claws 32 on the shafts are symmetrically arranged, and only when the two power shafts rotate in opposite directions, the actions of the extraction wheels 31 or the pressing claws 32 on the two power shafts can be synchronized, that is, at the same time, all are in the pressing working state or the extraction working state.

[0057] Furthermore, if Figure 2 As shown, both ends of the two power shafts 30 are connected through a synchronous transmission structure, thereby improving the transmission performance and making the forces on both ends of the two shafts more stable.

[0058] In this embodiment, the power shaft 30 is driven by the first motor, and the first motor can input power into the system through any power shaft 30 or any gear.

[0059] This embodiment can be found in Figure 3 and Figure 7 , and also includes a tension detection unit, one end of which is connected to the body 1, and the other end is provided with a hook for mounting on the structure of the measuring rod 2. In the process of the pull-out wheel 31 lifting the measuring rod 2 and pulling the measuring rod 2 off the surface of the measured target, the tension detection unit can detect the magnitude of the tension, which is convenient for recording the measurement data, and can also provide data support for the first motor to adjust the driving force of the power shaft 30. The tension detection unit 4 can use a spring-type tension gauge or an electronic tension gauge. The electronic tension gauge has better effect, more intuitive readings and can transmit data to the control system for automatic recording, or automatically adjust the force of the device on the measuring rod 2 according to the tension value.

[0060] Further, the tension detection unit includes a detection body 40 and a telescopic shaft 41;

[0061] The telescopic shaft 41 is threadedly matched with the body 1, and the upper end of the telescopic shaft 41 is rotatably connected to the part of the body 1, and the telescopic amount of the telescopic shaft 41 is controlled by the rotation amount. The function of the ring buckle 411 is that the tension detection unit will not be twisted during the process of the telescopic shaft 41 rotating to extend or retract.

[0062] The two sides of the detection body 40 are hook structures 401 , one side of which is mounted on the ring buckle 411 , and the other side is used to be mounted on the structure of the measuring rod 2 .

[0063] In the above embodiments, the detector 40 can be a tensiometer in the prior art. A tensiometer is an instrument used to measure the force on an object and is widely used in industrial production, scientific research experiments, quality inspection and other fields. In order to facilitate reading, an electronic tensiometer can be used, which can display the force received by the measuring rod in real time. At the same time, it is also the tensile force between the measuring rod and the object to be measured. Dividing the tensile force value of the tensiometer by the area of the adhesion area between the measuring rod and the object to be measured can obtain the force (or stress) per unit area of the coating on the object to be measured.

[0064] In the above embodiments, the telescopic shaft 41 can adjust the telescopic amount during rotation by cooperating with the threaded hole, as can be seen in Figure 8 . One function is that it can actively adjust the distance between the two ends of the tensile force detection unit, thereby adjusting the initial reading of the tensile force detection unit 4. Before the drawing test, it is convenient to calibrate or zero the reading of the tensile force detection unit 4. Another function is that when the telescopic shaft 41 extends, the hook at the upper end of the tensile force detection unit 4 can be easily removed from the measuring rod, so as to facilitate the removal of the measuring rod 2 from the machine body 1 for operations such as cleaning residual glue and applying new glue to the measuring rod 2.

[0065] Furthermore, the telescopic shaft 41 is power-connected to the second motor 5, and the second motor 5 drives the telescopic shaft 41 to rotate and adjust the telescopic amount of the telescopic shaft 41 relative to the surface of the machine body 1. The second motor 5 is slidably connected to the machine body 1 and the sliding direction is the same as the telescopic direction of the telescopic shaft 41.

[0066] During the rotation of the motor shaft, the telescopic shaft 41 is in threaded cooperation with the machine body 1. Therefore, the telescopic shaft 41 will move along its own axis, and the telescopic shaft 41 will also drive the motor to move synchronously. The motor and the machine body 1 must be slidably connected to ensure the normal progress of the above working process. It is also because of the threaded cooperation between the telescopic shaft 41 and the machine body 1 that during the drawing process, the tensile force received by the telescopic shaft 41 will only be transmitted to the machine body and not to the motor. On the premise of realizing the extension or retraction of the telescopic shaft 41 to adjust the reading of the tensile force detection unit 4 and facilitating the installation and detachment of the tensile force detection unit 4 and the measuring rod, the stability and reliability of the device itself, especially the motor, are ensured.

[0067] In summary, the present utility model effectively overcomes various shortcomings in the prior art, can produce beneficial technical effects, and has remarkable progress.

[0068] The above embodiments are only illustrative of the principles and effects of the present utility model and are not used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A pulling mechanism of an anti-corrosion coating detection device, used for pulling or pressing a measuring rod (2) having a force-bearing structure (22), characterized in that: include: A power shaft (30), a pull-out wheel (31) and a pressing claw (32); The power shaft (30) is rotatably disposed on the machine body (1) and is perpendicular to the direction of the measuring rod (2); The pulling wheel (31) and the pressing claw (32) are both fixedly connected to the power shaft (30); The pulling wheel (31) is lower than the force-bearing structure (22), and the pulling wheel (31) is along the first rotation direction of the circumference of the power shaft (30), and the distance from the outer edge of the pulling wheel (31) to the axis of the power shaft (30) gradually increases; Initially, the pressing claw (32) exceeds the force-bearing structure (22); When the power shaft (30) rotates in the opposite direction to the first rotation direction, the pressing claw (32) presses the force-bearing structure (22), and the pulling wheel (31) moves away from the force-bearing structure (22); When the power shaft (30) rotates along the first rotation direction, the clamping claw (32) moves away from the force-bearing structure (22), and the pulling wheel (31) lifts up the force-bearing structure (22).

2. The pulling mechanism of the anti-corrosion coating detection device according to claim 1, characterized in that: There are two pull-out wheels (31) and two clamping claws (32), which are respectively arranged on two sides of the power shaft (30) and are symmetrical about the axis plane of the measuring rod (2).

3. The pulling mechanism of the anti-corrosion coating detection device according to claim 2, characterized in that: It also includes another power shaft (30), two extraction wheels (31) and two pressing claws (32) which are assembled in the same manner, the two power shafts (30) are arranged in parallel and the corresponding extraction wheels (31) and pressing claws (32) on the two power shafts (30) are arranged symmetrically; a rectangle is formed with the four extraction wheels (31) or the pressing claws (32) as vertices, and the center of the rectangle coincides with the axis of the measuring rod (2); the two power shafts (30) are connected by a synchronous transmission structure and rotate in opposite directions.

4. The pulling mechanism of the anti-corrosion coating detection device according to claim 3 is characterized in that: The synchronous transmission structure is a transmission gear set (33) arranged in the middle area of ​​the two power shafts (30), and the power shafts (30) are provided with shaft gears. The shaft gears and the transmission gear set (33) are meshed to achieve the opposite rotation directions of the two power shafts (30).

5. The pulling mechanism of the anti-corrosion coating detection device according to claim 4, characterized in that: Both ends of the two power shafts (30) are transmission connected via the synchronous transmission structure.

6. The pulling mechanism of the anti-corrosion coating detection device according to claim 1, characterized in that: The power shaft (30) is driven by a first motor.

7. The pulling mechanism of the anti-corrosion coating detection device according to claim 1, characterized in that: It also comprises a tension detection unit, one end of which is connected to the machine body (1), and the other end of which is provided with a hook for being mounted on the structure of the measuring rod (2).

8. The pulling mechanism of the anti-corrosion coating detection device according to claim 7, characterized in that: The tension detection unit comprises a detection body (40) and a telescopic shaft (41); The telescopic shaft (41) is threadably engaged with the body (1); the upper end of the telescopic shaft (41) protrudes beyond the body (1) and is rotatably connected to a buckle (411); the telescopic amount of the telescopic shaft (41) is controlled by the amount of rotation; Both sides of the detection body (40) are hook structures (401), one side of which is mounted on the ring buckle (411), and the other side is used to be mounted on the structure of the measuring rod (2).

9. The pulling mechanism of the anti-corrosion coating detection device according to claim 8, characterized in that: The telescopic shaft (41) is connected to the second motor (5) by power, and the second motor (5) drives the telescopic shaft (41) to rotate and adjust the telescopic amount of the telescopic shaft (41) relative to the surface of the machine body (1).

10. The pulling mechanism of the anti-corrosion coating detection device according to claim 9, characterized in that: The second motor (5) is slidably connected to the machine body (1), and the sliding direction is consistent with the telescopic direction of the telescopic shaft (41).

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