Steel pipe thickness measuring device magnetized by penetrating type coil

Abstract

The utility model discloses a through-type coil magnetized steel pipe thickness measuring device, which belongs to the technical field of nondestructive testing and comprises a rotating main shaft sleeved on the periphery of a steel pipe, a first coil is arranged at the end part of the rotating main shaft, and a second coil is further arranged on the periphery of the first coil. The first coil and the second coil respectively generate a constant magnetic field and an alternating magnetic field for the steel pipe, and ultrasonic transverse waves generated by continuously alternating magnetostrictive strain are obtained, so that the thickness of the steel pipe is measured. According to the utility model, the profiling wear-resistant boot and the butterfly-shaped coil are adopted, the first adjusting mechanism is arranged to realize the adaptation to steel pipes with different sizes, and the electromagnetic coupling ring is used for transmitting signals of the electromagnetic ultrasonic instrument to the probe, so that the non-contact control on the probe is realized, and the rotation operation of the probe is facilitated; and a second adjusting mechanism is further arranged at the bottom of the base and used for adjusting the longitudinal position and the vertical position of the device, so that the device is matched with the linear propelling direction of the steel pipe, can be suitable for various application scenes and has good application value.

Description

Technical Field

[0001] The utility model belongs to the technical field of nondestructive testing, and in particular relates to a steel pipe thickness measuring device with through-type coil magnetization. Background Art

[0002] With the rapid development of modern non-destructive testing technology, various non-destructive testing technologies have also been increasingly developed and applied. Among them, electromagnetic ultrasonic testing technology has been widely used in the field of non-destructive testing due to its advantages such as no need for coupling agents, non-contact, and simple structure.

[0003] With the development of contemporary industry, steel pipes are widely used in many fields, including petroleum, chemical industry, electricity, construction, energy, agriculture, etc. The quality of steel pipes is directly related to their service life and safety. The accurate measurement of steel pipe thickness is of great significance for product quality control, production process optimization, failure analysis, etc. Therefore, non-destructive testing technology is increasingly used in steel pipe thickness measurement.

[0004] At present, the commonly used methods for measuring the thickness of steel pipes are piezoelectric ultrasound and electromagnetic ultrasound. Piezoelectric ultrasound cannot be used under complex conditions such as high temperature because it requires coupling agents, piezoelectric materials, and sound-transmitting layer materials are not resistant to high temperatures. Traditional permanent magnet electromagnetic ultrasonic probes have permanent magnets in the probe, and the structure is complicated, not resistant to high temperatures, and the probe is easily damaged by strong magnetic attraction. In addition, it is generally a single-point detection with low detection efficiency. It is not easy to apply to some scenarios and has certain limitations.

[0005] Therefore, there is an urgent need for a steel pipe thickness measuring device to solve the problem of measuring the wall thickness of a large surface of a steel pipe and measuring the wall thickness at high temperature. Utility Model Content

[0006] In view of one or more of the above defects or improvement needs in the prior art, the utility model provides a through-type coil magnetized steel pipe thickness measuring device for measuring the wall thickness of the steel pipe.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a through-type coil magnetized steel pipe thickness measuring device, which is used to measure the thickness of the steel pipe, and includes a base, on which a rotating main shaft coaxially arranged with the steel pipe is arranged, the rotating main shaft is rotatably connected with the base and sleeved on the outer periphery of the steel pipe, and one end of the rotating main shaft is provided with a first coil, which rotates with the rotating main shaft.

[0008] A second coil is also sleeved on the outer circumference of the first coil, and the second coil is fixedly connected to the base, so that the first coil can rotate inside the second coil.

[0009] As a further improvement of the utility model, a wear-resistant boot is provided at one end of the rotating main shaft, and the first coil is provided on the surface thereof adjacent to the steel pipe, and a plurality of the first coils are arranged in sequence along the lateral direction.

[0010] As a further improvement of the utility model, a first adjustment mechanism is provided corresponding to the wear-resistant shoe, including a primary adjustment unit.

[0011] The primary adjustment unit includes a guide rail arranged in a radial direction and a sliding part slidably connected to the guide rail, and the sliding part is connected to the wear-resistant shoe so that the wear-resistant shoe is away from or close to the steel pipe.

[0012] As a further improvement of the utility model, a secondary adjustment unit is also arranged between the sliding part and the wear-resistant shoe, including a driving part and a movable part connected to the output end of the driving part, the driving part is fixedly connected to the sliding part, and the movable part is fixedly connected to the wear-resistant shoe, so as to achieve the fitting of the wear-resistant shoe and the steel pipe.

[0013] As a further improvement of the utility model, it also includes a wireless electromagnetic coupling ring, including a primary coil and a secondary coil arranged coaxially, the primary coil is fixedly connected to the base, and the secondary coil is fixedly connected to the rotating main shaft.

[0014] As a further improvement of the present invention, a second adjustment mechanism is further provided at the bottom of the base, including a longitudinal adjustment unit and a vertical adjustment unit, for adjusting the longitudinal and vertical displacements of the base respectively.

[0015] As a further improvement of the present invention, the first coil is a butterfly-shaped structure.

[0016] As a further improvement of the present invention, a driving unit is provided corresponding to the rotating main shaft, for driving the rotating main shaft to rotate.

[0017] As a further improvement of the utility model, at least two bearings are arranged on the base at intervals along the axial direction, the outer ring of the bearing is fixedly connected to the base, and the inner ring thereof is fixedly connected to the rotating main shaft to support the rotating main shaft.

[0018] As a further improvement of the utility model, it further comprises a power supply, the power supply is electrically connected to the second coil and is used to supply power to the second coil, and / or

[0019] Also included is an ultrasound device, which is electrically connected to the primary coil and is used to send and receive signals.

[0020] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0021] In general, the above technical solution conceived by the utility model has the following beneficial effects compared with the prior art:

[0022] (1) The through-type coil magnetized steel pipe thickness measuring device of the utility model generates a constant magnetic field in the steel pipe below the second coil (magnetizing coil) after direct current is passed through it. The area below the second coil generates and maintains a constant magnetostrictive strain under the constant magnetic field magnetization, and the first coil generates an alternating magnetic field in the steel pipe when an alternating current is passed through it. The steel pipe in the area below it generates a secondary magnetostrictive strain of the same magnitude and opposite direction on the basis of the original magnetostrictive strain. When the constant magnetic field and the alternating magnetic field are in the same direction, the area is further stretched, and when the constant magnetic field and the alternating magnetic field are in opposite directions, the area is shortened conversely. Under the superposition of the constant magnetic field and the alternating magnetic field, the area continuously generates alternating magnetostrictive strain and generates ultrasonic transverse waves that propagate along the thickness direction of the steel pipe, thereby finally achieving thickness measurement;

[0023] (2) The through-type coil magnetized steel pipe thickness measuring device of the utility model sets the probe at the end of the rotating main shaft. Through the axial rotation of the rotating main shaft and the linear movement of the steel pipe along the axial direction, the probe can measure the wall thickness value of the steel pipe in the entire circumference, with a large coverage area and high detection efficiency;

[0024] (3) The through-type coil magnetized steel pipe thickness measuring device of the utility model is provided with a circular panel through the corresponding probe to install the first adjustment mechanism, and the radial position of the probe is adjusted by the first adjustment mechanism to adapt to steel pipes of different sizes, and the probe includes a wear-resistant shoe and a first coil (excitation and receiving coil) arranged on the wear-resistant shoe, the wear-resistant shoe is a contoured wear-resistant shoe, and the first coil is a butterfly-shaped coil, so as to achieve adaptation with different steel pipes and always fit with the surface of the steel pipe;

[0025] (4) The through-type coil magnetized steel pipe thickness measuring device of the utility model is provided with an electromagnetic coupling ring at one end of the rotating main shaft away from the probe, wherein the primary coil is fixedly connected to the base so that the position of the primary coil is relatively fixed, and the secondary coil is fixedly connected to the rotating main shaft, and the primary coil is electrically connected to the electromagnetic ultrasonic instrument, so that the electromagnetic ultrasonic instrument can control the probe through the electromagnetic coupling ring, thereby no longer needing to be electrically connected to the first coil, which facilitates the operation of the entire device;

[0026] (5) The through-type coil magnetized steel pipe thickness measuring device of the utility model has a second adjustment mechanism arranged at the bottom of the base, so that the device as a whole can be adjusted longitudinally and vertically, thereby adapting to the steel pipe transmission line and can be directly applied to the steel pipe production line;

[0027] (6) Compared with the piezoelectric ultrasonic thickness measurement method and the conventional permanent magnet electromagnetic ultrasonic probe thickness measurement method, the through-type coil magnetized steel pipe thickness measurement device of the utility model can realize the steel pipe thickness measurement under high temperature conditions, while avoiding the problem of easy damage and short life of the probe caused by the magnetic attraction of the permanent magnet probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the steel pipe thickness measuring device with through-type coil magnetization in the embodiment of the utility model;

[0029] Figure 2 It is an exploded view of a steel pipe thickness measuring device with a through-type coil magnetization in an embodiment of the utility model;

[0030] Figure 3 It is a schematic diagram of the overall structure of the panel and its related components in the embodiment of the utility model;

[0031] Figure 4 It is an exploded view of the rotating main shaft and its related components in the embodiment of the utility model;

[0032] Figure 5 It is a schematic diagram of the overall structure of the second adjustment mechanism in the embodiment of the utility model;

[0033] In all the drawings, the same figure marks represent the same technical features, specifically: 1. rotating spindle; 2. base; 3. wear-resistant shoe; 4. second coil; 5. first adjustment mechanism; 6. mounting seat; 7. circular panel; 8. driving motor; 9. first transmission wheel; 10. bearing; 11. protective shell; 12. tail stock; 13. second adjustment mechanism; 1301. sliding platform; 1302. second guide rail; 1303. lifting part; 14. steel pipe. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Example:

[0040] The steel pipe thickness measuring device with through-type coil magnetization in the preferred embodiment of the utility model is as follows Figures 1 to 5As shown in . It includes a base, a rotating spindle is arranged on the base, a probe is arranged at one end of the rotating spindle, and the probe includes a first coil. Driven by the rotating spindle rotating around its axis, the first coil is used to rotate around the outer peripheral wall of the steel pipe to perform detection. In actual application, the steel pipe passes through the rotating spindle, so that the first coil on the rotating spindle can scan the outer periphery of the pipe wall, and the steel pipe also moves axially, thereby realizing large-area thickness measurement of the steel pipe. Further explanation, the utility model takes the axial direction of the steel pipe as the horizontal direction, the height direction as the vertical direction, and the directions perpendicular to the horizontal direction and the vertical direction as the longitudinal direction.

[0041] Specifically, the rotating main shaft 1 is a hollow structure, so that the steel pipe 14 can pass through the rotating main shaft 1, and a plurality of first coils are arranged at one end of the rotating main shaft 1, and a second coil 4 is also arranged on the periphery of the first coil, and the steel pipe 14, the rotating main shaft 1 and the second coil 4 are coaxial. Further, the second coil 4 is a magnetizing coil, which can generate a static magnetic field along the axial direction after being energized. Under the action of the static magnetic field, the steel pipe 14 excites ultrasonic waves due to the magnetostrictive effect. The first coil is an electromagnetic ultrasonic excitation and receiving coil, which also obtains ultrasonic signals due to the inverse magnetostrictive effect after being passed through an alternating pulse current, and sends the signal to the host computer, and the host computer performs signal processing to give the dynamic wall thickness value of the steel pipe 14.

[0042] Furthermore, the probe also includes a wear-resistant boot 3, and the first coil is arranged on the surface of the wear-resistant boot 3. The wear-resistant boot 3 is a strip structure and is arranged in the transverse direction, so that the length direction of the wear-resistant strip is the same as the axial direction of the steel pipe 14, and the first coil is a plurality of first coils arranged in sequence in the transverse direction. Further preferably, the wear-resistant boot 3 is a contoured wear-resistant boot, which can be fixed and controlled to open and close by a mechanical structure, and can be tightly attached to the steel pipe 14 when closed. In addition, the first coil is preferably a butterfly-shaped structure, which is made by a flexible printed circuit board process. The center of the butterfly-shaped coil is evenly arranged with the wire, and the coverage range is good. There is basically no missed detection area, and the butterfly-shaped coil structure can be bent at a certain angle to match the arc surface, and the wire flow direction in the center area of ​​the first coil is perpendicular to the length direction of the steel pipe 14.

[0043] Furthermore, in actual application, the size of the steel pipe 14 is also different. In order to cope with different steel pipe structures, the steel pipe thickness measuring device is provided with a first adjustment mechanism 5 for adjusting the position of the wear-resistant shoe 3 to adapt to steel pipe structures of different specifications. Further preferably, the rotating spindle 1 is also a pipe structure, and the diameter of the internal through hole is larger to allow steel pipes 14 of different specifications to pass through.

[0044] Furthermore, a circular panel 7 is provided between the rotating main shaft 1 and the wear-resistant shoe 3, one end face of the circular panel 7 is fixedly connected to the end face of the rotating main shaft 1, and the circular panel 7 is also provided with through holes penetrating through its two end faces so that the steel pipe 14 can pass through, and a first adjustment mechanism 5 is provided on the panel to adjust the radial position of the wear-resistant shoe 3 to adapt to steel pipe structures of different specifications. Further preferably, two wear-resistant shoes 3 are provided on both sides of the steel pipe 14, and the first adjustment mechanism 5 matches the wear-resistant shoes 3 one by one.

[0045] In a preferred embodiment, the first adjustment mechanism 5 includes a primary adjustment unit, which includes a first guide rail arranged in a radial direction and a sliding part slidably connected to the first guide rail, and the sliding part is connected to the wear-resistant shoe 3, and the wear-resistant shoe 3 is driven away from or close to the side wall surface of the steel pipe 14 by the reciprocating displacement of the sliding part on the first guide rail, so as to adapt to steel pipes 14 of different specifications. Further, the first adjustment mechanism 5 can be a linear motor structure, the first guide rail is a stator, and the sliding part corresponds to a mover, and the mover can reciprocate in the radial direction, or there are multiple connection positions between the sliding part and the first guide rail to achieve the relative position fixation of the sliding part and the panel, for example, a plurality of screw holes penetrating the two end faces of the first guide rail are radially spaced, and corresponding screw holes are also arranged on the sliding part, and the two are fixedly connected by bolts.

[0046] Furthermore, by switching the connection position between the sliding part and the first guide rail, the fixed connection between the two is achieved, and the adjustment range achieved is limited. Correspondingly, a secondary adjustment unit is provided between the primary adjustment unit and the wear-resistant shoe 3, which includes a driving part and a movable part connected to the output end of the driving part. The end of the movable part away from the driving part is fixedly connected to the wear-resistant shoe 3, and the movable part is driven by the driving part to perform telescopic movement, thereby achieving radial fine adjustment of the wear-resistant shoe 3. Further preferably, a mounting seat 6 extending in the transverse direction is also provided on the movable part, and a mounting groove is provided on one side of the mounting seat 6 close to the wall of the steel pipe 14 for installing the wear-resistant shoe 3. The mounting seat 6 is detachably connected to the wear-resistant shoe 3, so that different wear-resistant shoes 3 can be installed in response to different steel pipe structures. Preferably, the driving part is one of a cylinder and an oil cylinder.

[0047] Furthermore, an electronic device is provided on the side of the panel away from the rotating main shaft 1, and is electrically connected to the primary adjustment unit and / or the secondary adjustment unit to perform the adjustment process of the primary adjustment unit and / or the secondary adjustment unit. Further explained, in the actual application process, the corresponding wear-resistant boot 3 can be selected according to the specifications of the steel pipe 14, and it can be set in the mounting seat 6, and the primary adjustment unit is used to perform preliminary adjustment, so that the wear-resistant boot 3 is as close to the side wall of the steel pipe 14 as possible. After the primary adjustment unit completes the adjustment process, it keeps the position fixed, and the secondary adjustment unit is used to perform secondary fine adjustment, so that the wear-resistant boot 3 is in contact with the side wall of the steel pipe 14. At the same time, after the wear-resistant boot 3 is in contact with the side wall of the steel pipe 14, the driving part can apply different forces to the movable part to adjust the pressure of the wear-resistant boot 3 on the side wall of the steel pipe 14, so as to ensure that the wear-resistant boot 3 is in contact with the side wall of the steel pipe 14, and will not be tightly fitted, so as to avoid the wear-resistant boot 3 from being damaged during the rotation process.

[0048] Furthermore, in order to realize the relative rotation between the rotating main shaft 1 and the base 2, a bearing 10 is further provided between the rotating main shaft 1 and the base 2, for supporting the rotating main shaft 1 and enabling it to rotate relative to the base 2, the inner ring of the bearing 10 is fixedly connected to the rotating main shaft 1, and the outer ring of the bearing 10 is fixedly connected to the base 2. Further preferably, there are two bearings 10 spaced apart along the axial direction.

[0049] In a preferred embodiment, a bracket is further provided between the bearing 10 and the base 2 for achieving a fixed connection between the bearing 10 and the base 2, and the bracket is also two brackets arranged at intervals along the horizontal direction. Furthermore, the base 2 includes a bottom plate and two side plates arranged at intervals along the longitudinal direction, the rotating main shaft 1 is arranged between the two side plates, and a top plate is also arranged on the top of the two side plates, wherein the bracket at one end close to the probe is respectively connected to the base 2 and the top plate, while the other bracket is connected to the two side plates to achieve a stable support for the rotating main shaft 1. Further preferably, a protective shell 11 is also provided on the outer periphery of the bearing 10, so that the two bearings 10 are arranged at intervals in the protective shell 11, which protects the rotating main shaft 1 on the one hand, and avoids direct contact between the outer ring of the bearing 10 and the bracket on the other hand, thereby extending the service life of the bearing 10.

[0050] Furthermore, a driving unit is also provided corresponding to the rotating main shaft 1 for driving the rotating main shaft 1 to rotate so as to complete the corresponding scanning process.

[0051] In one embodiment, the driving unit includes a rotating gear sleeved on the outer periphery of the rotating main shaft 1 and a driving motor 8. A gear is set at the output end of the driving motor 8. The two gears are meshed to drive the rotating gear to rotate, thereby driving the rotating main shaft 1 to rotate.

[0052] In another preferred embodiment, the driving unit drives the rotation of the rotating main shaft 1 by means of belt transmission, and includes a first transmission wheel 9 sleeved on the outer periphery of the rotating main shaft 1 and a driving motor 8 arranged on the top, and a second transmission wheel is arranged at the output end of the driving motor 8, and the two transmission wheels are connected by a transmission belt, so as to realize the rotation of the rotating main shaft 1. Furthermore, a top plate is also arranged on the top of the two side plates of the base 2, and the driving motor 8 is arranged on the top plate, and an opening is correspondingly opened on the top plate to allow the transmission belt to pass through. Further preferably, a plurality of protrusions are arranged on the outer wall surfaces of the two transmission wheels along the circumferential interval to prevent slippage between the transmission belt and the transmission wheel.

[0053] Further, the second coil 4 is arranged in the shell, and a sliding assembly is arranged between the shell and the base 2, so that the shell and the base 2 are slidably connected, and the guide rail in the sliding assembly is arranged in the horizontal direction, so that the second coil 4 can be adjusted in the horizontal direction, thereby changing the relative position of the probe (first coil) and the second coil 4 in the horizontal direction. Further, in actual use, the second coil 4 is electrically connected to the power supply to form a static magnetic field.

[0054] Furthermore, in order to realize signal transmission, a wireless electromagnetic coupling ring is also provided, including a primary coil and a secondary coil arranged coaxially, wherein the primary coil is fixedly connected to the base 2, and the secondary coil is fixedly connected to the rotating main shaft 1, so that the secondary coil rotates with the rotating main shaft 1, the primary coil is electrically connected to the electromagnetic ultrasonic instrument, and the two coils realize signal transmission by magnetic field coupling. The electromagnetic ultrasonic instrument is also connected to a host computer, and the host computer processes the signal transmitted by the electromagnetic ultrasonic instrument to obtain the real-time wall thickness. Further preferably, a tailstock 12 is also provided at the end of the rotating main shaft 1 away from the probe, for installing the secondary coil, and the primary coil is fixedly connected to the bracket.

[0055] Further explanation, the use principle of the utility model is as follows: after the first adjustment mechanism 5 completes the adaptability adjustment of the steel pipe 14, the steel pipe 14 passes through the second coil 4, the rotating spindle 1 starts to rotate, the second coil 4 (magnetization coil) is energized to generate an axial static magnetic field in the steel pipe 14, the electromagnetic ultrasonic instrument sends a signal to the primary coil, and passes an alternating current to the first coil (excitation and receiving coil) through the secondary coil. At this time, the first coil is the excitation coil, and a dynamic alternating magnetic field is generated in the steel pipe 14. Under the coupling effect of the above two magnetic fields, magnetostrictive strain will occur in the steel pipe 14, causing particle vibration, and generating ultrasonic waves propagating in the radial direction. The ultrasonic wave waveform is a transverse wave. The ultrasonic wave propagates in the steel pipe 14 and will be reflected when encountering the inner wall of the pipeline. The reflected ultrasonic wave will react with the static magnetic field provided by the through-type magnetization coil to generate a new dynamic alternating magnetic field, and will be received by the first coil to form a pulse reflection signal, and will be transmitted to the host computer via the electromagnetic ultrasonic instrument, and the signal will be processed by the host computer to obtain the wall thickness data. Furthermore, since the ultrasonic wave will be reflected and propagated back and forth between the upper and lower surfaces of the steel pipe 14 for many times until it is attenuated to the point where it cannot be extracted, the first coil can collect multiple reflected echo signals. By measuring the time interval t between two adjacent reflected echo signals, the thickness d=v*t / 2 of the pipeline test point can be obtained, where v is the transverse wave propagation speed of the ultrasonic wave in the steel pipe 14. Further preferably, driven by the drive motor 8, the rotating spindle 1 rotates, and at the same time, the steel pipe 14 also moves linearly in a linear transmission manner, so that the probe can perform a spiral scan on the steel pipe 14 to achieve all-round thickness measurement of the steel pipe 14.

[0056] In actual application, the steel pipe thickness measuring device of the utility model needs to be connected to the steel pipe transmission system for application, so as to measure the thickness of the steel pipe 14 during the axial transmission of the steel pipe 14. In this way, the vertical and longitudinal positions of the rotating main shaft 1 need to be adjusted to achieve the coaxial setting of the rotating main shaft 1 and the steel pipe 14. Correspondingly, the thickness measuring device also includes a second adjustment mechanism 13.

[0057] Furthermore, the second adjustment mechanism 13 includes a longitudinal adjustment unit and a vertical adjustment unit, wherein the longitudinal adjustment unit includes a second guide rail 1302 arranged longitudinally and a sliding platform 1301 slidably connected to the second guide rail 1302, and the second guide rail 1302 is a plurality of second guide rails 1302 arranged at intervals in the transverse direction. The vertical adjustment unit is arranged on the sliding platform 1301 and driven by a motor to achieve vertical position adjustment of the base 2.

[0058] In a preferred embodiment, there are preferably three second guide rails 1302, wherein the second guide rail 1302 in the middle is a stator, and the sliding platform 1301 is a mover, and the two form a linear motor, thereby realizing the longitudinal displacement of the sliding platform 1301. The vertical adjustment unit includes a motor and a lifting part 1303 disposed at the four corners of the sliding platform 1301, and the lifting part 1303 includes a screw and a plate, and a screw structure is formed between the two. When the screw rotates, the plate rises or falls. Furthermore, a first gear and a second gear that are meshed with each other are also provided below the plate. The first gear is sleeved on the screw and fixedly connected to the screw, and the second gear is perpendicular to the first gear, and the second gear is connected to an external power source. The second gear drives the first gear to rotate, and then the lifting and lowering of the plate is realized through the screw structure.

[0059] In one embodiment, a motor is provided on the sliding platform 1301, and its output shaft is respectively connected to the two lifting parts 1303 on both sides of the longitudinal direction, and the lifting parts 1303 are driven to rise and fall by driving the second gear. Further, the two lifting parts 1303 on the same side are transmitted through a transmission assembly. For the convenience of description, the two lifting parts 1303 on the same side are respectively the first lifting part and the second lifting part, wherein the motor output shaft is directly connected to the second gear of the first lifting part to drive the first lifting part to move, and the transmission assembly includes a third gear, a fourth gear and a transmission chain, wherein the third gear is fixedly connected to the motor output shaft, and the fourth gear is coaxially arranged with the second gear in the second lifting part. Such an arrangement enables the third gear to rotate when the motor output shaft rotates, and drives the fourth gear to rotate through the transmission chain, thereby driving the second gear in the second lifting part to rotate, so as to complete the rotation of the second lifting part, thereby completing the synchronous lifting control of the four lifting parts through one motor.

[0060] The through-type coil magnetized steel pipe thickness measuring device in the utility model includes a rotating main shaft sleeved on the outer periphery of the steel pipe, a first coil is arranged at the end of the rotating main shaft, and a second coil is also arranged on the outer periphery of the first coil. The first coil and the second coil respectively generate a constant magnetic field and an alternating magnetic field for the steel pipe, so as to obtain the ultrasonic transverse wave generated by the continuously alternating magnetostrictive strain, so as to achieve the measurement of the thickness of the steel pipe. Furthermore, by adopting a contoured wear-resistant boot, a butterfly-shaped coil, and setting a first adjustment mechanism, the adaptation of steel pipes of different sizes is achieved, and the signal of the electromagnetic ultrasonic instrument is transmitted to the probe through an electromagnetic coupling ring, so as to achieve non-contact control of the probe and facilitate the rotation operation of the probe; at the same time, a second adjustment mechanism is arranged at the bottom of the base, which is used to adjust the longitudinal and vertical positions of the device, so as to adapt to the linear propulsion direction of the steel pipe, so that the thickness measuring device can be directly applied to the steel pipe production line, and has good application value.

[0061] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A through-type coil magnetized steel pipe thickness measuring device, used for measuring the thickness of steel pipes, characterized in that: The invention comprises a base, on which a rotating main shaft coaxially arranged with the steel pipe is arranged, the rotating main shaft is rotatably connected with the base and sleeved on the outer periphery of the steel pipe, and a first coil is arranged at one end of the rotating main shaft, which rotates with the rotating main shaft. A second coil is also sleeved on the outer circumference of the first coil, and the second coil is fixedly connected to the base, so that the first coil can rotate inside the second coil.

2. The through-type coil magnetized steel pipe thickness measuring device according to claim 1, wherein: A wear-resistant shoe is arranged at one end of the rotating main shaft, and the first coil is arranged on the surface of the wear-resistant shoe adjacent to the steel pipe. A plurality of the first coils are arranged in sequence along the lateral direction.

3. The through-type coil magnetized steel pipe thickness measuring device according to claim 2, wherein: A first adjustment mechanism is provided corresponding to the wear-resistant shoe, including a primary adjustment unit, The primary adjustment unit includes a guide rail arranged in a radial direction and a sliding part slidably connected to the guide rail, and the sliding part is connected to the wear-resistant shoe so that the wear-resistant shoe is away from or close to the steel pipe.

4. The through-type coil magnetized steel pipe thickness measuring device according to claim 3, wherein: A secondary adjustment unit is also provided between the sliding part and the wear-resistant shoe, including a driving part and a movable part connected to the output end of the driving part. The driving part is fixedly connected to the sliding part, and the movable part is fixedly connected to the wear-resistant shoe, so as to achieve the fitting of the wear-resistant shoe and the steel pipe.

5. The steel pipe thickness measuring device according to any one of claims 1 to 4, wherein: It also includes a wireless electromagnetic coupling ring, including a primary coil and a secondary coil coaxially arranged, wherein the primary coil is fixedly connected to the base, and the secondary coil is fixedly connected to the rotating main shaft.

6. The steel pipe thickness measuring device according to any one of claims 1 to 4, wherein: The bottom of the base is also provided with a second adjustment mechanism, which includes a longitudinal adjustment unit and a vertical adjustment unit, for adjusting the longitudinal and vertical displacements of the base respectively.

7. The steel pipe thickness measuring device according to any one of claims 1 to 4, wherein: The first coil is a butterfly-shaped structure.

8. The steel pipe thickness measuring device according to any one of claims 1 to 4, wherein: A driving unit is provided corresponding to the rotating main shaft, and is used to drive the rotating main shaft to rotate.

9. The steel pipe thickness measuring device according to any one of claims 1 to 4, wherein: At least two bearings are arranged on the base at intervals along the axial direction. The outer ring of the bearing is fixedly connected to the base, and the inner ring of the bearing is fixedly connected to the rotating main shaft to support the rotating main shaft.

10. The through-type coil magnetized steel pipe thickness measuring device according to claim 5, wherein: A power source is also included, the power source is electrically connected to the second coil and is used to supply power to the second coil, and / or Also included is an ultrasound device, which is electrically connected to the primary coil and is used to send and receive signals.

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