A device for detecting the thickness of a zinc plating layer

Abstract

The utility model relates to a galvanization layer thickness detection device, including having first mounting seat, the first mounting seat is installed with second mounting seat, the coaxial installation of electromagnetic induction probe has in second mounting seat, the coaxial installation of electromagnetic induction probe one end has damper, and the spring is wound on damper, and the first slot is seted up on second mounting seat. The utility model discloses through being provided with first mounting seat, second mounting seat, electromagnetic induction probe, clamping arm, connecting plate, bolt rod, insertion hole, damper, spring and first slot, through two clamping arms rotation can be fixed vertically in pipeline on first mounting seat, through the bolt rod insertion is connected in the inside of insertion hole can limit two clamping arms from turning loose, through the first slot joint limit makes damper, spring and electromagnetic induction probe perpendicular to pipeline, makes electromagnetic induction probe tightly support on the lateral wall of pipeline under the action of spring elasticity, thereby avoids electromagnetic induction probe slip when measuring, thereby improves electromagnetic induction probe measurement's stability and precision.

Description

Technical Field

[0001] This utility model relates to the field of thickness detection technology, specifically a zinc plating layer thickness detection device. Background Technology

[0002] The zinc coating thickness testing device is a specialized instrument used to accurately measure the geometric thickness of the zinc coating on the surface of metal substrates. It can quantify the zinc coating thickness parameters through non-destructive or destructive testing methods, providing core data for evaluating the corrosion resistance of workpieces and determining whether the coating quality meets standards (such as ISO1463, GB / T4956). It is widely used in hardware, automotive, steel structure and other fields.

[0003] Existing methods for detecting galvanized layer thickness include non-destructive testing (NDT) and destructive testing. NDT devices include: magnetic thickness gauges, whose core structure includes an electromagnetic induction probe, a signal processing unit, and a display module. The principle is based on Faraday's law of electromagnetic induction—when an alternating current is passed through the probe coil, a magnetic field is generated. Ferromagnetic substrates (such as steel) will induce eddy current magnetic fields. The galvanized layer weakens this magnetic field strength. The device calculates the coating thickness by detecting the change in magnetic field and combining it with a calibration curve, making it suitable for detecting galvanized layers on steel substrates. Eddy current thickness gauges, on the other hand, consist of a high-frequency eddy current probe, an oscillator, a signal amplifier, and a data processor. The principle is that the probe generates high-frequency eddy currents. When used on non-ferromagnetic substrates (such as aluminum and copper) covered by galvanized layers, different coating thicknesses cause changes in eddy current impedance. The device converts the impedance signal into an electrical signal and calculates the thickness value. It is less affected by surface flatness.

[0004] Existing galvanized layer thickness testing devices typically use simple flat-headed cylindrical probes. When measuring pipes, if the steel pipe surface has a certain curvature, it is difficult to ensure stable perpendicularity and constant pressure between the probe and the surface to be measured, leading to measurement point drift, uneven pressure, and significant errors. Secondly, these instruments lack positioning and marking capabilities. After operators discover an abnormal thickness point, they cannot accurately locate and mark the position for subsequent re-inspection or process adjustment, seriously affecting testing efficiency and data traceability. Utility Model Content

[0005] The technical problem to be solved by this utility model is that when the probe of the existing galvanized layer thickness detection device is in use, it may cause the measurement point to drift, resulting in uneven pressure and affecting the accuracy of galvanized layer thickness measurement.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A galvanized layer thickness detection device includes a first mounting base, a second mounting base mounted on the first mounting base, an electromagnetic induction probe coaxially mounted on the second mounting base, a damper coaxially mounted on one end of the electromagnetic induction probe, a spring wound on the damper, a first slot opened on the second mounting base for the damper, spring and electromagnetic induction probe to be snapped together, the other end of the electromagnetic induction probe to be attached to the side wall of the pipe for detection, clamping arms mounted on both ends of the first mounting base, the clamping arms being sleeved on the pipe to be tested when rotating, connecting plates mounted on the clamping arms, pin rods mounted on the connecting plates, and insertion holes opened on the connecting plates for the pin rods to be inserted.

[0007] The beneficial effects of this utility model are as follows: by providing a first mounting base, a second mounting base, an electromagnetic induction probe, clamping arms, a connecting plate, a pin rod, a socket, a damper, a spring, and a first slot, the first mounting base can be vertically fixed on the pipe by rotating the two clamping arms. The pin rod inserted into the socket can prevent the two clamping arms from rotating and loosening. The first slot is used to lock and limit the damper, spring, and electromagnetic induction probe to be perpendicular to the pipe. The electromagnetic induction probe is tightly supported on the side wall of the pipe under the action of the spring force, thereby preventing the electromagnetic induction probe from slipping during measurement and thus improving the stability and accuracy of the electromagnetic induction probe measurement.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the first mounting base is threadedly connected to a threaded rod, and a limit plate is coaxially mounted on one end of the threaded rod. The limit plate is rotatably connected to the second mounting base. Rotating the threaded rod can drive the second mounting base to move, which improves the convenience of vertical movement of the second mounting base.

[0010] Furthermore, the first mounting base has a second slot for the second mounting base to slide, and two sliding grooves are formed on the inner side wall of the second slot. Two sliders are fixedly connected to the second mounting base, and the sliders are slidably connected inside the sliding grooves to improve the stability of the vertical movement of the second mounting base.

[0011] Furthermore, a handwheel is coaxially mounted on the other end of the threaded rod, and the handwheel has anti-slip grooves, which improves the convenience of rotating the threaded rod.

[0012] Furthermore, a display screen is mounted on the first mounting base, and a pressure sensor is mounted on the inner top of the first slot. The pressure sensor is connected to the other end of the damper. The pressure sensor is used to detect pressure and send an electrical signal to the control unit of the display screen, thereby improving the accuracy of pressure control by the electromagnetic induction probe.

[0013] Furthermore, a washer is fitted at the bottom of the electromagnetic induction probe. The washer is circular and coated with ink to facilitate marking the measurement points.

[0014] Furthermore, both clamping arms are arc-shaped, and each clamping arm is equipped with a clamping block. Several grooves are formed on the inner sidewall of each clamping block, which increases the frictional resistance of the clamping arms.

[0015] Furthermore, a third slot is provided on the inner side wall of each of the two clamping arms, and the clamping blocks are respectively engaged in the third slot, which improves the convenience of clamping block installation.

[0016] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting up clamping blocks, a third groove, and a recess, clamping blocks of different inner diameters can be engaged inside the third groove, allowing the clamping blocks to adhere to the side wall of the pipe, which can improve the stability and adaptability of the clamping arm; by setting up a threaded rod, a slider, a limiting plate, a handwheel, a second groove, and a sliding groove, the second mounting base is restricted from rotating by the slider, allowing the second mounting base to maintain vertical movement inside the second groove, which facilitates the adjustment of the distance between the electromagnetic induction probe and the side wall of the pipe, thereby improving the adaptability of the detection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the unfolded structure of the second mounting base of this utility model; Figure 4 This is a cross-sectional view of the second mounting base of this utility model; Figure 5 This is a cross-sectional view of the first mounting base of this utility model; Figure 6 This is a schematic diagram of the unfolded clamping arm structure of this utility model; The attached diagram lists the components represented by each number as follows: 1. First mounting base; 2. Second mounting base; 3. Electromagnetic induction probe; 4. Clamping arm; 5. Connecting plate; 6. Pin rod; 7. Clamping block; 8. Insertion hole; 9. Threaded rod; 10. Display screen; 11. Damper; 12. Spring; 13. First slot; 14. Slider; 15. Washer; 16. Limiting plate; 17. Handwheel; 18. Pressure sensor; 19. Second slot; 20. Slide groove; 21. Third slot; 22. Groove. Detailed Implementation

[0018] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0019] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0020] like Figure 1-6As shown, a zinc coating thickness detection device includes a first mounting base 1, which is made of plastic and used for support and limitation. A second mounting base 2, also made of plastic and cylindrical, is mounted on the first mounting base 1. An electromagnetic induction probe 3, a type F probe, is coaxially mounted on the second mounting base 2. Based on the principle of magnetism, the F-type probe can be used to measure the thickness and weight of non-magnetic coatings on magnetic metal substrates, with a measurement range of 0-1500 μm. When an alternating current is passed through the coil inside the electromagnetic induction probe 3, a magnetic field is generated, inducing eddy currents in ferromagnetic substrates such as steel pipes. A flowing magnetic field is weakened by the galvanized layer. The device calculates the coating thickness by detecting the change in magnetic field and combining it with a calibration curve. A damper 11 is coaxially mounted to one end of the electromagnetic induction probe 3 via bolts. A spring 12 is wound around the damper 11. A first slot 13 is provided on the second mounting base 2 for the damper 11, spring 12, and electromagnetic induction probe 3 to be snapped together. The other end of the electromagnetic induction probe 3 is attached to the side wall of the pipe for detection. The elastic force of the spring 12 acts on the electromagnetic induction probe 3 to increase the pressure on the test pipe, thereby preventing slippage and loosening. 11 is installed in the middle of spring 12 to limit the lateral displacement of spring 12 and to dissipate the energy generated by the vibration of spring 12 when it resets through friction, thereby improving the stability of the electromagnetic induction probe 3. Both ends of the first mounting base 1 are hinged with clamping arms 4. The two clamping arms 4 are arc-shaped and symmetrically distributed. When the clamping arms 4 rotate, they are sleeved on the pipe to be tested. Each clamping arm 4 is equipped with a connecting plate 5, and each connecting plate 5 is equipped with a pin rod 6. Each connecting plate 5 has a hole 8 for the pin rod 6 to be inserted, thereby limiting the rotation of the two clamping arms 4. By setting the first mounting base 1, the second mounting base 2, and the electromagnetic probe 3, the system can achieve the desired stability. The electromagnetic induction probe 3, clamping arms 4, connecting plate 5, pin rod 6, insertion hole 8, damper 11, spring 12, and first slot 13 are used to fix the first mounting base 1 vertically on the pipe by rotating the two clamping arms 4. The pin rod 6 is inserted into the insertion hole 8 to prevent the two clamping arms 4 from rotating and loosening. The first slot 13 is used to lock and limit the damper 11, spring 12, and electromagnetic induction probe 3 to be perpendicular to the pipe. The electromagnetic induction probe 3 is tightly supported on the side wall of the pipe under the action of the spring force of spring 12, thereby preventing the electromagnetic induction probe 3 from slipping during measurement and improving the stability and accuracy of the electromagnetic induction probe 3 measurement.

[0021] In practical use, this utility model can also replace the insertion hole 8 and the pin rod 6 with a slot and a locking block. The slot is formed on one of the connecting plates 5, and the locking block is rotatably connected to the other connecting plate 5. When the two connecting plates 5 are close together, by rotating the locking block, the locking block is engaged inside the slot, thereby restricting the rotation of the two clamping arms 4 and improving the stability of the clamping arms 4. like Figure 2-5As shown, the first mounting base 1 is threadedly connected to a threaded rod 9. One end of the threaded rod 9 is coaxially mounted with a limiting plate 16 by welding. The limiting plate 16 is rotatably connected to the second mounting base 2. Rotating the threaded rod 9 can drive the second mounting base 2 to move, improving the convenience of vertical movement of the second mounting base 2. The first mounting base 1 has a second slot 19 for the second mounting base 2 to slide. Two sliding grooves 20 are formed on the inner side wall of the second slot 19. Two sliders 14 are fixedly connected to the second mounting base 2. The sliders 14 are slidably connected inside the sliding grooves 20, improving the vertical movement of the second mounting base 2. To ensure the stability of the vertical movement of the seat 2, a handwheel 17 is coaxially mounted on the other end of the threaded rod 9 via bolts to expand the lever arm. The handwheel 17 has an anti-slip groove to prevent slippage and loosening when rotating the handwheel 17, thus improving the convenience of rotating the threaded rod 9. By setting up the threaded rod 9, slider 14, limit plate 16, handwheel 17, second slot 19 and slide groove 20, the slider 14 restricts the rotation of the second mounting seat 2, so that the second mounting seat 2 keeps vertical movement inside the second slot 19, which facilitates the adjustment of the distance between the electromagnetic induction probe 3 and the side wall of the pipe, thereby improving the adaptability of the detection.

[0022] like Figure 2-5 As shown, a display screen 10 is installed on the first mounting base 1, and a pressure sensor 18 is installed on the inner top of the first slot 13. The pressure sensor 18 is connected to the other end of the damper 11. The pressure sensor 18 is used to detect pressure and send an electrical signal to the control unit of the display screen 10. The display screen 10 is used to display the pressure detected by the pressure sensor 18 for easy observation by the operator. This facilitates the control of the electromagnetic induction probe 3 on the side wall of the pipe to be tested by the testing personnel, thereby improving the control accuracy. A washer 15 is fitted at the bottom of the electromagnetic induction probe 3. The washer 15 is made of sponge material and is circular. The washer 15 is coated with ink. When the electromagnetic induction probe 3 moves vertically, the washer 15 first contacts the side wall of the pipe to be tested. The surface of the washer 15 is loose and porous and has a certain elasticity. The washer 15 first contacts the side wall of the pipe, which facilitates the buffer support of the electromagnetic induction probe 3. When the washer 15 is pressed on the side wall of the pipe, the ink on the washer 15 is imprinted on the side wall of the pipe, realizing the marking of the measurement point.

[0023] like Figure 2 and 6As shown, both clamping arms 4 are arc-shaped, and each clamping arm 4 is equipped with a clamping block 7. The clamping blocks 7 are made of rubber and are arc-shaped, with a certain degree of elasticity. Several grooves 22 are opened on the inner side wall of each clamping block 7. The grooves 22 are used to expand the contact area with the pipe to be tested, thereby increasing the frictional resistance between the clamping block 7 and the pipe and increasing the frictional resistance of the clamping arm 4. A third slot 21 is opened on the inner side wall of each of the two clamping arms 4. The clamping blocks 7 are respectively snapped into the third slot 21, which improves the convenience of clamping block 7 installation. By setting clamping blocks 7, third slots 21 and grooves 22, clamping blocks 7 with different inner diameters can be snapped into the third slot 21, so that the clamping blocks 7 are attached to the side wall of the pipe, which can improve the stability and adaptability of clamping arm 4.

[0024] Working principle: When using this galvanized layer thickness detection device, the operator first connects to an external power supply, then rotates the two clamping arms 4 to clamp the side wall of the pipe fitting to be tested. Next, the pin rod 6 is inserted into the insertion hole 8, thus restricting the rotation of the clamping arms 4 and keeping the first mounting base 1 and the second mounting base 2 perpendicular to the pipe fitting. The electromagnetic induction probe 3 is engaged inside the first slot 13, so that the probe of the electromagnetic induction probe 3 faces the side wall of the pipe fitting. Under the pressure of the spring 12, the electromagnetic induction probe 3 adheres to the side wall of the pipe fitting, thus avoiding electromagnetic induction during measurement. The probe 3 slides, thereby improving the stability and accuracy of the electromagnetic induction probe 3 measurement. The damper 11 and the first slot 13 support and limit the vertical movement of the electromagnetic induction probe 3 and the spring 12, thereby improving the stability of the vertical movement. The washer 15 contacts the pipe side wall first under the pressure of the electromagnetic induction probe 3, so that the ink on the washer 15 is printed on the roller side wall, thereby facilitating the marking of the measurement point. By rotating the threaded rod 9, the second mounting base 2 and the electromagnetic induction probe 3 can be pushed to move vertically, which facilitates the fine adjustment of the distance between the electromagnetic induction probe 3 and the pipe side wall, and improves the adaptability of the installation of the electromagnetic induction probe 3.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for detecting the thickness of a zinc plating layer, characterized by: The device includes a first mounting base (1), a second mounting base (2) mounted on the first mounting base (1), an electromagnetic induction probe (3) coaxially mounted on the second mounting base (2), a damper (11) coaxially mounted on one end of the electromagnetic induction probe (3), a spring (12) wound on the damper (11), a first slot (13) opened on the second mounting base (2), the first slot (13) is used for the damper (11), the spring (12) and the electromagnetic induction probe (3) to be snapped together, the other end of the electromagnetic induction probe (3) is attached to the side wall of the pipe for detection, clamping arms (4) are installed on both ends of the first mounting base (1), the clamping arms (4) are sleeved on the pipe to be tested when rotating, a connecting plate (5) is installed on the clamping arms (4), a pin rod (6) is installed on the connecting plate (5), and a socket (8) is opened on the connecting plate (5), the socket (8) is used for the pin rod (6) to be inserted.

2. The galvanized layer thickness detection device according to claim 1, wherein The first mounting base (1) is threadedly connected to a threaded rod (9), and a limit plate (16) is coaxially mounted on one end of the threaded rod (9). The limit plate (16) is rotatably connected to the second mounting base (2).

3. The apparatus for detecting the thickness of a zinc plating layer according to claim 2, wherein The first mounting base (1) has a second slot (19) for the second mounting base (2) to slide. Two sliding grooves (20) are opened on the inner side wall of the second slot (19). Two sliders (14) are fixedly connected to the second mounting base (2). The sliders (14) are slidably connected inside the sliding grooves (20).

4. The apparatus for detecting the thickness of a zinc plating layer according to claim 2, wherein A handwheel (17) is coaxially mounted on the other end of the threaded rod (9), and the handwheel (17) has an anti-slip groove.

5. The apparatus for detecting the thickness of a zinc plating layer according to claim 1, wherein The first mounting base (1) is equipped with a display screen (10), and the top of the first slot (13) is equipped with a pressure sensor (18). The pressure sensor (18) is connected to the other end of the damper (11). The pressure sensor (18) is used to detect pressure and send an electrical signal to the control unit of the display screen (10).

6. The zinc coating thickness detection device according to claim 1, characterized in that, An oil washer (15) is fitted at the bottom of the electromagnetic induction probe (3). The oil washer (15) is circular and coated with ink.

7. The zinc coating thickness detection device according to claim 1, characterized in that, Both clamping arms (4) are arc-shaped, and clamping blocks (7) are installed on both clamping arms (4). Several grooves (22) are opened on the inner side wall of each clamping block (7).

8. The apparatus for detecting the thickness of a zinc plating layer according to claim 7, wherein The inner walls of the two clamping arms (4) are provided with a third slot (21), and the clamping blocks (7) are respectively engaged in the third slot (21).

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