A pipe wall thickness automatic detection device and detection method

Abstract

This invention belongs to the field of pipe testing and discloses an automatic pipe wall thickness detection device and method. The detection device includes a frame, a clamping and rotating mechanism, a horizontal moving mechanism, a spring clamping mechanism, and a Hall effect measuring mechanism. The clamping and rotating mechanism is mounted on the frame and is used to clamp the pipe to be tested and drive it to rotate circumferentially. The horizontal moving mechanism is movably mounted on the frame along the length of the pipe to be tested and is located below the clamping and rotating mechanism. The spring clamping mechanism is mounted on the horizontal moving mechanism. The Hall effect measuring mechanism includes a steel ball, a measuring rod, and a main unit. The steel ball is placed inside the pipe to be tested. The measuring rod is electrically connected to the main unit and is mounted on the spring clamping mechanism with its head abutting against the bottom of the pipe to be tested, used to measure the distance between the head and the steel ball placed inside the pipe. The main unit is fixedly connected to the horizontal moving mechanism. This invention is particularly effective for non-destructive testing of the wall thickness of sintered plastic pipes containing micropores.

Description

Technical Field

[0001] This invention relates to the field of pipe testing technology, and more particularly to an automatic pipe wall thickness testing device and testing method. Background Technology

[0002] Currently, most non-destructive testing technologies for pipe wall thickness utilize ultrasonic technology, primarily for online inspection in extrusion production lines. However, ultrasonic testing requires the material being tested to have a dense structure. For sintered pipes containing micropores, the presence of air in the structure makes it impossible to accurately measure the wall thickness using ultrasonic technology.

[0003] Sintered plastic pipes with micropores are widely used in liquid filtration and membrane filtration technologies in the chemical industry. Due to the special nature of their production, uneven pipe wall thickness is prone to occur. This defect must be detected, otherwise it will lead to serious defects in subsequent products and cause huge economic losses. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic pipe wall thickness detection device and method to achieve automatic and non-destructive detection of pipe wall thickness.

[0005] The technical solution provided by this invention is as follows:

[0006] On the one hand, an automatic pipe wall thickness detection device is provided, comprising:

[0007] frame;

[0008] A clamping and rotating mechanism is mounted on the frame and is used to clamp the pipe to be tested and drive the pipe to be tested to rotate in the circumferential direction.

[0009] A horizontal moving mechanism is movably mounted on the frame along the length of the pipe to be tested and is located below the clamping and rotating mechanism;

[0010] A spring-loaded clamping mechanism is provided on the horizontal moving mechanism;

[0011] The Hall effect measuring mechanism includes a steel ball, a measuring rod, and a main unit. The steel ball is placed inside the pipe to be tested. The measuring rod is electrically connected to the main unit and is mounted on the elastic clamping mechanism with its head abutting against the bottom of the pipe to be tested. The measuring rod is used to measure the distance between the head and the steel ball placed inside the pipe to be tested. The main unit is fixedly connected to the horizontal moving mechanism.

[0012] In some embodiments, a steel ball recovery mechanism is also included, which is mounted on the frame and has one end in contact with the pipe to be tested, for recovering steel balls placed inside the pipe to be tested.

[0013] In some embodiments, there are two steel ball recovery mechanisms, one of which abuts against one end of the pipe to be tested, and the other abuts against the other end of the pipe to be tested.

[0014] In some embodiments, the steel ball recovery mechanism includes a support, a mounting component, a recovery tube, and a fixing plate. The support is movably mounted on the frame, the mounting component is mounted on the support, and the mounting component has a slot. One end of the recovery tube extends into the slot, and the other end abuts against the tube to be tested. The fixing plate is inserted into the slot and connected to the recovery tube to limit the position of the recovery tube.

[0015] In some embodiments, the inner diameter of the recovery tube is equal to the inner diameter of the pipe to be tested, and the outer diameter of the recovery tube is equal to the outer diameter of the pipe to be tested.

[0016] In some embodiments, the clamping and rotating mechanism includes a driving roller, a driven roller, a clamping roller, a drive motor, and a cylinder. The driving roller and the driven roller are respectively mounted on the frame and arranged opposite to each other for clamping the pipe to be tested. The clamping roller is mounted on the frame and located above the driving roller and the driven roller. The drive motor is mounted on the frame for driving the driving roller to rotate. The cylinder is mounted on the frame for driving the clamping roller to move downward to clamp the pipe to be tested.

[0017] In some embodiments, the pressing and rotating mechanism further includes a distance adjustment unit, through which the driven roller is connected to the frame, and the distance adjustment unit is used to adjust the distance between the driven roller and the driving roller.

[0018] In some embodiments, the distance adjustment unit includes an adjusting member, a slider, a first adjusting nut, and a second adjusting nut. The adjusting member includes a first sidewall and a second sidewall disposed opposite to each other. The adjusting member is disposed on the frame. The slider is movably disposed within the adjusting member. The driven roller is connected to the slider. The first adjusting nut passes through the first sidewall of the adjusting member and abuts against one side of the slider. The second adjusting nut passes through the second sidewall of the adjusting member and abuts against the other side of the slider. Rotating the first adjusting nut and the second adjusting nut causes the slider to move and causes the driven roller to move closer to or further away from the driving roller.

[0019] In some embodiments, the elastic clamping mechanism includes a fixed frame, an upper floating plate, a lower floating plate, a first spring, a second spring, a guide rod, a limiting member, and a clamping member. The fixed frame includes a base plate and a side plate, and the base plate is fixed to the horizontal moving mechanism.

[0020] The first end of the lower floating plate is rotatably connected to the side plate, and the second end of the lower floating plate is rotatably connected to the clamping member;

[0021] The upper floating plate is disposed above the lower floating plate. The first end of the upper floating plate is rotatably connected to the side plate and extends to one side of the side plate. The second end of the upper floating plate is located on the other side of the side plate and is rotatably connected to the clamping member.

[0022] The first spring is disposed on the side of the side plate away from the bottom plate, with one end of the first spring connected to the side plate and the other end connected to the first end of the upper floating plate;

[0023] The guide rod passes through the upper floating plate and the lower floating plate and is connected to the bottom plate; the second spring is sleeved on the guide rod and is located between the lower floating plate and the bottom plate.

[0024] The limiting member is disposed on the guide rod and abuts against the side of the upper floating plate away from the lower floating plate, and the clamping member is used to clamp the measuring rod.

[0025] In some embodiments, the clamping member includes a connecting portion and a clamping portion. The connecting portion is rotatably connected to the second end of the upper floating plate and the second end of the lower floating plate, respectively. The clamping portion is disposed on the side of the connecting portion facing the side plate and is used to clamp the measuring rod.

[0026] In some embodiments, the clamping part is provided with a clamping hole and a slit. The clamping hole and the slit respectively penetrate the clamping part along the thickness direction of the clamping part. The slit communicates with the clamping hole. When the size of the slit is reduced, the clamping hole can clamp the measuring rod.

[0027] In some embodiments, the horizontal moving mechanism includes a fixed plate, a horizontal guide rail, and a motor. An elastic clamping mechanism is disposed on the fixed plate. The horizontal guide rail extends along the length of the pipe to be tested. The fixed plate is movably disposed on the horizontal guide rail. The motor is disposed on the fixed plate and drives the fixed plate to move along the horizontal guide rail.

[0028] On the other hand, a detection method for an automatic pipe wall thickness detection device is also provided, wherein the automatic pipe wall thickness detection device is the automatic pipe wall thickness detection device described in any of the above embodiments, and the detection method includes:

[0029] The clamping and rotating mechanism drives the pipe under test to rotate continuously along the circumference at a preset speed;

[0030] The horizontal movement mechanism drives the measuring rod of the Hall effect measuring mechanism to move along the length of the pipe to be measured, so as to measure the thickness of the pipe at different locations.

[0031] Furthermore, a detection method for an automatic pipe wall thickness detection device is also provided, wherein the automatic pipe wall thickness detection device is the automatic pipe wall thickness detection device described in any of the above embodiments, and the detection method includes:

[0032] Step 1: The clamping and rotating mechanism drives the pipe to be tested to rotate around the circumference by a preset angle and then stops;

[0033] Step 2: The horizontal moving mechanism drives the measuring rod of the Hall effect measuring mechanism to move along the length of the pipe to be measured;

[0034] Repeat steps one and two above until the pipe to be tested has rotated one full revolution.

[0035] The technical effects of this invention are as follows:

[0036] (1) The clamping and rotating mechanism of the present invention can drive the pipe to be tested to make circular motion, and the horizontal moving mechanism can drive the measuring rod to move in a straight line so as to measure the spacing points according to the requirements. Through the clever combination of circular motion and linear motion, and by making reasonable use of Hall effect detection equipment, non-destructive testing of the wall thickness of non-magnetic pipes can be realized. In particular, it can effectively solve the non-destructive testing of the wall thickness of sintered plastic pipes with micropores, and distinguish unqualified products according to the requirements. The detection device has a wide range of applications.

[0037] (2) This testing device has a compact structure and can continuously and repeatedly measure the wall thickness of pipes, resulting in high testing efficiency. In addition, the design and use of the steel ball recovery mechanism avoids the problem of steel balls falling and being put back in each measurement, while improving testing efficiency.

[0038] (3) The measuring rod is clamped by a double spring and double floating plate structure. Under the action of the spring force, the upper floating plate and the lower floating plate move up and down along the rotating shaft, so that the measuring rod is in close contact with the pipe to be measured with appropriate elasticity. The measurement accuracy is high, the structure is safe and stable, and the lead wire at the lower end of the measuring rod will not interfere with the first spring and the second spring, thus avoiding the influence of the wire or lead wire at the lower end of the measuring rod on the spring support structure. Attached Figure Description

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0040] Figure 1 This is a side view of an automatic pipe wall thickness detection device provided in a specific embodiment of this application;

[0041] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0042] Figure 3 This is a front view of an automatic pipe wall thickness detection device provided in a specific embodiment of this application;

[0043] Figure 4 This is a partial top view of an automatic pipe wall thickness detection device provided in a specific embodiment of this application;

[0044] Figure 5 This is a side view of the elastic clamping mechanism provided in a specific embodiment of this application;

[0045] Figure 6 This is a top view of the elastic clamping mechanism provided in a specific embodiment of this application.

[0046] Explanation of icon numbers:

[0047] 10. Frame; 20. Clamping and rotating mechanism; 21. Driving roller; 211. Driving support frame; 22. Driven roller; 221. Driven support frame; 23. Clamping wheel; 24. Drive motor; 25. Cylinder; 26. Adjusting component; 261. First side wall; 262. Second side wall; 27. Slider; 281. First adjusting nut; 282. Second adjusting nut; 29. ​​Sliding guide rail; 30. Horizontal moving mechanism; 31. Fixed plate; 32. Horizontal guide rail; 33. Motor; 34. Gear; 35. Rack; 40. Elastic clamping mechanism Structure; 41. Fixing frame; 411. Base plate; 4111. Waist-shaped hole; 412. Side plate; 42. Upper floating plate; 43. Lower floating plate; 44. First spring; 45. Second spring; 46. Guide rod; 47. Limiting component; 48. Clamping component; 481. Connecting part; 482. Clamping part; 483. Slit; 50. Pipe to be tested; 61. Steel ball; 62. Measuring rod; 63. Main unit; 70. Steel ball recovery mechanism; 71. Support component; 72. Mounting component; 73. Recovery pipe; 74. Fixing plate; 80. Operation panel; 90. Warning light. Detailed Implementation

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] To keep the drawings concise, only the parts relevant to the invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of components with the same structure or function is shown schematically, or only one is labeled. In this document, "one" can mean not only "only one" but also "more than one".

[0050] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0051] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] In one embodiment of this application, such as Figures 1 to 3 As shown, an automatic pipe wall thickness detection device includes a frame 10, a clamping and rotating mechanism 20, a horizontal moving mechanism 30, a spring clamping mechanism 40, and a Hall effect measuring mechanism.

[0054] The clamping and rotating mechanism 20 is mounted on the frame 10 and is used to clamp the pipe 50 to be tested and drive the pipe 50 to be tested to rotate in the circumferential direction. The horizontal moving mechanism 30 is movably mounted on the frame 10 along the length direction (axial direction) of the pipe 50 to be tested and is located below the clamping and rotating mechanism 20. The elastic clamping mechanism 40 is mounted on the horizontal moving mechanism 30. The Hall effect measuring mechanism includes a steel ball 61, a measuring rod 62 and a main unit 63. The steel ball 61 is used to be placed inside the pipe 50 to be tested. The measuring rod 62 is electrically connected to the main unit 63. The measuring rod 62 is mounted on the elastic clamping mechanism 40 and the head of the measuring rod 62 abuts against the bottom of the pipe 50 to be tested, and is used to measure the distance between the head and the steel ball 61 placed inside the pipe 50 to be tested. The main unit 63 is fixedly connected to the horizontal moving mechanism 30.

[0055] Specifically, this invention employs Hall effect detection technology to detect the wall thickness of the pipe 50 under test. During detection, the magnetic steel ball 61 of the Hall measuring mechanism is placed inside the pipe 50. The head of the measuring rod 62 attracts the steel ball 61 inside the pipe 50, and the measuring rod 62 measures the distance between its head and the steel ball 61. This distance is the wall thickness of the pipe 50. Because the detection device utilizes the Hall effect principle, the steel ball 61 and the measuring rod 62 are magnetically attracted to adhere to the wall of the pipe 50 to achieve the effect of measuring the wall thickness. Therefore, the structural components and support components of this detection device must all be made of non-magnetic materials, and correspondingly, this detection device can only detect non-magnetic pipes.

[0056] The pipe 50 to be tested is clamped by the clamping and rotating mechanism 20, which can drive the pipe 50 to be tested to rotate along the circumference of the pipe 50. The measuring rod 62 is clamped by the elastic clamping mechanism 40, which can provide the measuring rod 62 with appropriate elastic force under the action of elastic force, so that the measuring rod 62 is pressed tightly against the pipe 50 to be tested with a certain force.

[0057] The elastic clamping mechanism 40 is mounted on the horizontal moving mechanism 30. The horizontal moving mechanism 30 is movable along the length direction (axial direction) of the pipe 50 to be tested. The horizontal moving mechanism 30 can drive the elastic clamping mechanism 40 and the measuring rod 62 to move together along the length direction of the pipe 50 to be tested, so that the measuring rod 62 can measure the thickness of the pipe 50 at different points along the length direction. At the same time, in conjunction with the rotation of the pipe 50 to be tested along the circumferential direction, the wall thickness of the pipe 50 to be tested can be detected at all intervals.

[0058] like Figure 4 As shown, the horizontal moving mechanism 30 includes a fixed plate 31, a horizontal guide rail 32, and a motor 33. The elastic clamping mechanism 40 is disposed on the fixed plate 31. The horizontal guide rail 32 extends along the length direction (axial direction) of the pipe 50 to be tested. The fixed plate 31 is movably disposed on the horizontal guide rail 32. The motor 33 is disposed on the fixed plate 31 and drives the fixed plate 31 to move along the horizontal guide rail 32. When the fixed plate 31 moves along the horizontal guide rail 32, it drives the elastic clamping mechanism 40 to move along the length direction of the pipe 50 to be tested.

[0059] Furthermore, the horizontal moving mechanism 30 also includes a gear 34 and a rack 35. The gear 34 is fixedly connected to the output shaft of the motor 33, and the rack 35 is set on the frame 10 and extends along the length direction of the pipe 50 to be tested. The gear 34 and the rack 35 mesh, and when the output shaft of the motor 33 rotates, the fixed plate 31 moves along the horizontal guide rail 32 through the action of the gear 34 and the rack 35.

[0060] This invention utilizes Hall effect detection technology, combined with a reasonable mechanical structure, to achieve comprehensive non-destructive automatic wall thickness detection of non-magnetic pipes, especially sintered plastic pipes containing micropores. It not only has high detection efficiency and simple structure, saving manpower, but also avoids the problem of defective products caused by uneven wall thickness of pipes, thereby reducing economic losses.

[0061] In some embodiments, such as Figure 3As shown, the automatic pipe wall thickness detection device also includes a steel ball recovery mechanism 70. The steel ball recovery mechanism 70 is mounted on the frame 10 and one end abuts against the pipe 50 to be tested, used to recover the steel balls 61 placed inside the pipe 50. After one pipe 50 is tested, the steel ball 61 can be recovered into the steel ball recovery mechanism 70. After a new pipe 50 is placed in, the steel ball 61 is then sucked out of the steel ball recovery mechanism 70 and placed into the new pipe 50 for measurement. By setting up the steel ball recovery mechanism 70, the problem of steel balls 61 falling out and being placed in during each measurement can be avoided, improving measurement efficiency.

[0062] Preferably, there are two steel ball recovery mechanisms 70. One steel ball recovery mechanism 70 abuts against one end of the pipe 50 to be tested, and the other steel ball recovery mechanism 70 abuts against the other end of the pipe 50 to be tested. By setting two steel ball recovery mechanisms 70, after the testing device has measured one pipe 50, the steel ball 61 and measuring rod 62 do not need to return to the starting end. Measurement can be performed again by resetting the data, achieving back-and-forth measurement and improving measurement efficiency. For example, when the first pipe is measured, the measuring rod 62 and steel ball 61 move from the left end to the right end. The steel ball 61 is recovered into the steel ball recovery mechanism 70 on the right end. When a second pipe is placed, the measuring rod 62 draws the steel ball 61 from the steel ball recovery mechanism 70 on the right end into the right end of the second pipe, and measurement can be performed directly from the right end to the left end, achieving back-and-forth measurement and improving testing efficiency.

[0063] like Figure 3 As shown, the steel ball recycling mechanism 70 includes a support member 71, a mounting member 72, a recycling pipe 73, and a fixing plate 74. The support member 71 is movably mounted on the frame 10 to change the position of the support member 71 on the frame 10, thereby adjusting the position of the recycling pipe 73. The support member 71 can be a support frame, support rod, or other component with a supporting function.

[0064] Mounting component 72 is mounted on support component 71. Mounting component 72 has a slot. One end of the recovery tube 73 extends into the slot, and the other end abuts against the pipe 50 to be tested. Fixing plate 74 is inserted into the slot and connected to the recovery tube 73 to limit its movement. After the recovery tube 73 is installed in the slot, it is limited by the fixing plate 74 to restrict its lateral movement. The recovery tube 73 abuts against the pipe 50 to be tested. After the measurement of the pipe 50 is completed, the measuring rod 62 draws the steel ball 61 from the pipe 50 into the recovery tube 73. At this time, the measuring rod 62 abuts against the outer wall of the recovery tube 73. When measuring the next pipe 50, the measuring rod 62 moves to the outer wall of the pipe 50 and draws the steel ball 61 from the recovery tube 73 into the pipe 50.

[0065] In some embodiments, such as Figure 2As shown, the clamping and rotating mechanism 20 includes an active roller 21, a driven roller 22, a clamping roller 23, a drive motor 24, and a cylinder 25. The active roller 21 and the driven roller 22 are respectively mounted on the frame 10 and arranged radially opposite to each other along the pipe 50 to be tested, for clamping the pipe 50 to be tested. The active roller 21 can be connected to the frame 10 through an active support frame 211, and the driven roller 22 can be connected to the frame 10 through a driven support frame 221. The clamping roller 23 is mounted on the frame 10 and located above the active roller 21 and the driven roller 22. The drive motor 24 is mounted on the frame 10 for driving the active roller 21 to rotate, and the cylinder 25 is mounted on the frame 10 for driving the clamping roller 23 to move downward to clamp the pipe 50 to be tested.

[0066] The pipe to be tested 50 is positioned between the driving roller 21 and the driven roller 22. A clamping roller 23 presses the pipe 50 down to maintain its straightness. When the clamping roller 23 presses down, its position is determined based on the dimensions of the pipe 50. Then, the cylinder 25 drives the clamping roller 23 to press down. To adjust the pressure, the air volume at the cylinder 25's inlet is adjusted to ensure that the pipe 50 rotates synchronously with the driving roller 21.

[0067] To prevent friction damage to the pipe 50 under test and to prevent slippage, both the driving roller 21 and the driven roller 22 are covered with rubber. When the driving roller 21 is driven to rotate by the drive motor 24, it can cause the pipe 50 under test to rotate synchronously with the driving roller 21. The lengths of the driving roller 21 and the driven roller 22 are set according to the required length of the pipe 50 under test, and they can also be spliced ​​in sections.

[0068] Furthermore, the clamping and rotating mechanism 20 also includes a distance adjustment unit. The driven roller 22 is connected to the frame 10 via the distance adjustment unit, which is used to adjust the distance between the driven roller 22 and the driving roller 21. The distance between the driven roller 22 and the driving roller 21 is adjusted according to the diameter of the pipe 50 to be tested, so that the gap between the driving roller 21 and the driven roller 22 is adapted to the diameter of the pipe 50 to be tested. By setting the distance adjustment unit, the testing device can test pipes of different diameters, thus improving the applicability of the testing device.

[0069] like Figure 2As shown, the distance adjustment unit includes an adjustment component 26, a slider 27, a first adjustment nut 281, and a second adjustment nut 282. The adjustment component 26 includes a first sidewall 261 and a second sidewall 262 arranged opposite to each other. The first sidewall 261 and the second sidewall 262 are arranged radially spaced along the pipe 50 to be tested. The adjustment component 26 is a U-shaped component and is mounted on the frame 10. The slider 27 is movably mounted inside the adjustment component 26. The driven roller 22 is connected to the slider 27. The first adjustment nut 281 passes through the first sidewall 261 of the adjustment component 26 and abuts against one side of the slider 27. The second adjustment nut 282 passes through the second sidewall 262 of the adjustment component 26 and abuts against the other side of the slider 27. When the first adjustment nut 281 and the second adjustment nut 282 are rotated, the slider 27 moves closer to or away from the driving roller 21, thereby moving the driven roller 22 closer to or away from the driving roller 21, so as to reduce or increase the distance between the driven roller 22 and the driving roller 21.

[0070] For example, the first sidewall 261 is disposed near the drive roller 21, and the second sidewall 262 is disposed on the side of the first sidewall 261 away from the drive roller 21. When it is necessary to reduce the distance between the driven roller 22 and the drive roller 21, the first adjusting nut 281 can be loosened and the second adjusting nut 282 can be tightened, so that the slider 27 moves in the direction closer to the drive roller 21 and drives the driven roller 22 closer to the drive roller 21, thereby reducing the distance between the driven roller 22 and the drive roller 21. When it is necessary to increase the distance between the driven roller 22 and the drive roller 21, the second adjusting nut 282 can be loosened and the first adjusting nut 281 can be tightened, so that the slider 27 moves in the direction away from the drive roller 21 and drives the driven roller 22 away from the drive roller 21, thereby increasing the distance between the driven roller 22 and the drive roller 21.

[0071] The distance adjustment unit also includes a sliding guide rail 29 and a driven support frame 221. The sliding guide rail 29 is mounted on the slider 27. One end of the driven support frame 221 is connected to the sliding guide rail 29, and the other end is connected to the driven roller 22. The driven roller 22 is connected to the sliding guide rail 29 via the driven support frame 221. The sliding guide rail 29 is connected to the slider 27. When the slider 27 moves, it drives the sliding guide rail 29 to move, and also drives the driven support frame 221 and the driven roller 22 on the sliding guide rail 29 to move together, thereby increasing or decreasing the distance between the driven roller 22 and the driving roller 21. The main unit 63 of the Hall effect measuring mechanism is located on the side of the sliding guide rail 29 away from the driven roller 22. The main unit 63 is connected to the fixed plate 31 of the horizontal moving mechanism 30 via a connecting rod. The connecting rod is located below the sliding guide rail 29. The horizontal moving mechanism 30 drives the main unit 63 to move together.

[0072] In some embodiments, such as Figure 5 and Figure 6As shown, the elastic clamping mechanism 40 includes a fixed frame 41, an upper floating plate 42, a lower floating plate 43, a first spring 44, a second spring 45, a guide rod 46, a limiting member 47, and a clamping member 48. The fixed frame 41 includes a base plate 411 and a side plate 412. The base plate 411 is fixed on the fixed plate 31 of the horizontal moving mechanism 30. The first end of the lower floating plate 43 is rotatably connected to the side plate 412, and the second end of the lower floating plate 43 is rotatably connected to the clamping member 48. The upper floating plate 42 is disposed above the lower floating plate 43. The first end of the upper floating plate 42 is rotatably connected to the side plate 412, and its end extends to one side of the side plate 412. The second end of plate 42 is located on the other side of side plate 412 and is rotatably connected to clamping member 48; the first spring 44 is disposed on the side of side plate 412 away from bottom plate 411, one end of the first spring 44 is connected to side plate 412, and the other end of the first spring 44 is connected to the first end of upper floating plate 42; guide rod 46 passes through upper floating plate 42 and lower floating plate 43 and is connected to bottom plate 411, second spring 45 is sleeved on guide rod 46 and is located between lower floating plate 43 and bottom plate 411; limiting member 47 is disposed on guide rod 46 and abuts against the side of upper floating plate 42 away from lower floating plate 43, and clamping member 48 is used to clamp measuring rod 62.

[0073] The clamping member 48 includes a connecting part 481 and a clamping part 482. The connecting part 481 and the clamping part 482 can be integrally formed or separately formed and then connected by bolts. The connecting part 481 is rotatably connected to the second end of the upper floating plate 42 and the second end of the lower floating plate 43, respectively. The clamping part 482 is located on the side of the connecting part 481 facing the side plate 412 and is used to clamp the measuring rod 62.

[0074] Specifically, the fixing frame 41 includes a base plate 411 and a side plate 412. The side plate 412 is connected to the base plate 411 to form an L-shaped component. The base plate 411 is provided with an oblong hole 4111. The base plate 411 is fixed to the fixing plate 31 of the horizontal moving mechanism 30 by bolts or other fasteners. The oblong hole 4111 on the base plate 411 can adjust the installation position of the fixing frame 41 on the fixing plate 31 to adjust the installation position of the elastic clamping mechanism 40.

[0075] The upper part of the side plate 412 is provided with a groove, and the first ends of the upper floating plate 42 and the lower floating plate 43 are respectively set in the groove and are rotatably connected to the side plate 412 through a rotating shaft.

[0076] The clamping part 482 of the clamping member 48 is connected to the connecting part 481 to form an inverted L shape. The clamping part 482 is horizontally arranged, and the connecting part 481 is vertically arranged. The bottom of the connecting part 481 is provided with a groove. The second ends of the upper floating plate 42 and the lower floating plate 43 are respectively arranged in the groove of the connecting part 481 and are rotatably connected to the connecting part 481 through a rotating shaft.

[0077] The outer wall of the guide rod 46 is provided with external threads. The limiting member 47 is threadedly connected to the guide rod 46. Tightening the limiting member 47 can limit the position of the upper floating plate 42 and the lower floating plate 43. The first end of the upper floating plate 42 is tensioned by the first spring 44, and the lower floating plate 43 is supported by the second spring 45 on the guide rod 46. In this way, under the action of the two springs, the upper and lower floating plates can drive the clamping member 48 to float up and down, thereby driving the measuring rod 62 on the clamping member 48 to move up and down, so that the measuring rod 62 maintains a reasonable elasticity and is pressed tightly against the pipe 50 to be tested.

[0078] The clamping part 482 is provided with a clamping hole and a slit 483. The clamping hole and the slit 483 penetrate the clamping part 482 along the thickness direction. The slit 483 communicates with the clamping hole. When the size of the slit 483 is reduced, the clamping hole can clamp the measuring rod 62. The measuring rod 62 is installed in the clamping hole. When the two sides of the slit 483 are locked by fixing bolts to reduce the slit spacing, the measuring rod 62 can be fixed in the clamping hole.

[0079] The upper floating plate 42 and the lower floating plate 43 are respectively provided with openings to avoid the measuring rod 62. The area where the measuring rod 62 extends out of the clamping part 482 is located in the openings to ensure that the measuring rod 62 passes smoothly through the upper floating plate 42 and the lower floating plate 43.

[0080] In actual use, first loosen the fixing bolts, then adjust the position of the measuring rod 62 up and down. After the position of the measuring rod 62 is roughly appropriate (at this time, the head of the measuring rod 62 is slightly higher than the bottom of the pipe 50 to be tested), press down on the clamping part 48 by hand. Under the action of the tension of the first spring 44 and the support force of the second spring 45, the measuring rod 62 can be pressed against and attached to the pipe 50 to be tested.

[0081] Because Hall effect measurement utilizes the magnetic force of steel ball 61 and measuring rod 62 to bidirectionally adhere to the pipe 50 under test, steel ball 61 is tightly adhered to the inner wall of the pipe 50 under the influence of magnetic force. If the measuring rod 62 does not have sufficient tension stress, it is highly likely that the measuring rod 62 will not be completely or continuously adhered to the pipe 50 under test during the measurement process, resulting in inaccurate measurement data. Furthermore, if the tension stress is too high, it will increase the friction between the measuring rod 62 and the pipe 50 under test. This can easily damage the measuring rod 62 and cause it to be pressed into the pipe 50 under test, resulting in indentations and inaccurate measurement data.

[0082] Currently, a spring is often used to directly hold the measuring rod 62 in place. This is because the measuring rod 62 has a wire connecting to the main unit 63. If the wire passes through the side of the spring, it can easily cause uneven force on the spring when it is compressed, resulting in uneven elastic force, easy bending, and inconvenient adjustment each time.

[0083] In this embodiment, the measuring rod 62 is clamped by a double spring and double floating plate structure. Under the action of the spring force, the upper floating plate 42 and the lower floating plate 43 move up and down along the rotating shaft, so that the measuring rod 62 is in close contact with the pipe 50 to be tested with appropriate elasticity. Moreover, the lead wire at the lower end of the measuring rod 62 will not interfere with the first spring 44 and the second spring 45, thus avoiding the influence of the wire or lead wire at the lower end of the measuring rod 62 on the spring support structure.

[0084] One detection method of the automatic pipe wall thickness detection device is as follows:

[0085] The clamping and rotating mechanism 20 drives the pipe to be tested 50 to rotate continuously along the circumference at a preset speed;

[0086] The horizontal moving mechanism 30 drives the measuring rod 62 of the Hall measuring mechanism to move along the length of the pipe 50 to be measured, so as to measure the thickness of the pipe 50 at different positions.

[0087] Specifically, the operation panel 80 on the operation and testing device drives the active roller 21 to rotate under the action of the drive motor 24 and the synchronous belt, and drives the pipe to be tested 50 to rotate in the circumferential direction at a certain speed.

[0088] Meanwhile, the motor 33 controlling the horizontal moving mechanism 30 is driven by the gear 34 and rack 35, causing the horizontal moving mechanism 30 to slide along the horizontal guide rail 32 at a certain speed, and driving the elastic clamping mechanism 40 and the measuring rod 62 on the horizontal moving mechanism 30 to move together.

[0089] The main unit 63 of the Hall effect measuring mechanism is fixed on the fixed plate 31 of the horizontal moving mechanism 30 and moves together with the horizontal moving mechanism 30. The main unit 63 displays real-time measurement data and stores and records it based on the measurement signal from the measuring rod 62.

[0090] After measuring a pipe and recording the data, the steel ball 61 and measuring rod 62 enter the recovery tube 73 of the steel ball recovery mechanism 70. The steel ball 61 and measuring rod 62 are removed from the pipe 50 to be tested and placed into the recovery tube 73. The tested pipes are then sorted and placed, and a new pipe 50 is placed in for measurement. During the next measurement, the measuring rod 62 moves to the lower outer side of the new pipe 50, and the steel ball 61 simultaneously enters the new pipe 50 under magnetic force, entering the measurement process under automatic control. This device allows for bidirectional reciprocating measurement under positioning and automatic control, eliminating the need for the measuring rod 62 to return to the starting point. Measurement can be repeated simply by resetting the data, thus improving measurement efficiency.

[0091] Before measurement, set the allowable error range on the Hall effect measuring mechanism. When the wall thickness measurement value exceeds the above-set range, the warning light 90 on the detection device flashes red and the system sounds an alarm. When the measurement value is within the set range, the warning light 90 turns green and the alarm sounds.

[0092] Continuous pipe inspection is achieved by the back-and-forth movement of the measuring rod 62, which is driven by a motor 33 on the fixed plate 31. The motor 33 drives the fixed plate 31 of the horizontal moving mechanism 30 to move via a gear and rack transmission mechanism. By controlling the rotational speed of the drive motor 24 of the active roller 21 and the moving speed of the motor 33 of the measuring rod 62, different pitch spiral measurement methods can be achieved to meet the requirements of measurement spacing.

[0093] Another detection method for the automatic pipe wall thickness detection device is:

[0094] Step 1: The clamping and rotating mechanism 20 drives the pipe to be tested 50 to rotate around the circumference by a preset angle and then stops;

[0095] Step 2: The horizontal moving mechanism 30 drives the measuring rod 62 of the Hall measuring mechanism to move along the length of the pipe 50 to be measured;

[0096] Repeat steps one and two above until the pipe to be tested has rotated 50 degrees.

[0097] Specifically, the rotation angle of the active roller 21 is controlled by the drive motor 24 of the active roller 21. The active roller 21 stops after rotating a certain angle, allowing the motor 33 of the measuring rod 62 to drive the measuring rod 62 to move at a certain speed for measurement. After the measurement stroke is completed, the drive motor 24 of the active roller 21 drives the active roller 21 to rotate a certain angle again, repeating the measurement and recording the data until the pipe 50 under test has rotated one revolution. This measurement method achieves linear measurement at different intervals based on a certain angle, achieving the same measurement effect as the spiral measurement method described above.

[0098] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A pipe wall thickness automatic detection device, characterized by, The device comprises a rack, a pressing and rotating mechanism arranged on the rack and used for clamping a pipe to be measured and driving the pipe to rotate in a circumferential direction, a horizontal moving mechanism arranged on the rack and below the pressing and rotating mechanism along a length direction of the pipe to be measured, an elastic clamping mechanism arranged on the horizontal moving mechanism, a Hall measuring mechanism comprising a steel ball, a measuring rod and a main machine, the steel ball being arranged in the pipe to be measured, the measuring rod being electrically connected with the main machine, the measuring rod being arranged on the elastic clamping mechanism and a head of the measuring rod abutting against a bottom of the pipe to be measured, and the main machine being fixedly connected with the horizontal moving mechanism. The elastic clamping mechanism comprises a fixed frame, an upper floating plate, a lower floating plate, a first spring, a second spring, a guide rod, a limiting piece and a clamping piece, the fixed frame comprising a bottom plate and a side plate, the bottom plate being fixedly arranged on the horizontal moving mechanism. The first end of the lower floating plate is rotatably connected with the side plate, and the second end of the lower floating plate is rotatably connected with the clamping piece. The upper floating plate is arranged above the lower floating plate, the first end of the upper floating plate is rotatably connected with the side plate and extends to one side of the side plate, and the second end of the upper floating plate is located on the other side of the side plate and rotatably connected with the clamping piece. The first spring is arranged on the side plate away from the bottom plate, one end of the first spring is connected with the side plate, and the other end of the first spring is connected with the first end of the upper floating plate. The guide rod passes through the upper floating plate and the lower floating plate and is connected with the bottom plate, the second spring is sleeved on the guide rod and located between the lower floating plate and the bottom plate. The limiting piece is arranged on the guide rod and abuts against the side of the upper floating plate away from the lower floating plate, and the clamping piece is used for clamping the measuring rod.

2. The device according to claim 1, further comprising a steel ball recovery mechanism arranged on the rack and abutting against one end of the pipe to be measured, and used for recovering the steel ball arranged in the pipe to be measured.

3. The device according to claim 2, wherein the number of the steel ball recovery mechanisms is two, one steel ball recovery mechanism abutting against one end of the pipe to be measured, and the other steel ball recovery mechanism abutting against the other end of the pipe to be measured.

4. The device according to claim 2 or 3, wherein the steel ball recovery mechanism comprises a supporting piece, a mounting piece, a recovery pipe and a fixing piece, the supporting piece being movably arranged on the rack, the mounting piece being arranged on the supporting piece, the mounting piece being provided with a clamping groove, one end of the recovery pipe being inserted into the clamping groove, the other end of the recovery pipe abutting against the pipe to be measured, and the fixing piece being inserted into the clamping groove and connected with the recovery pipe, and used for limiting the recovery pipe.

5. The device according to claim 4, wherein ​ ​ ​ ​ ​ ​ ​ ​ The inner diameter of the recovery pipe is equal to the inner diameter of the pipe to be measured, and the outer diameter of the recovery pipe is equal to the outer diameter of the pipe to be measured. 6.The pipe wall thickness automatic detection device according to any one of claims 1 to 3, characterized in that, The pressing rotating mechanism comprises a driving roller, a driven roller, a pressing wheel, a driving motor and a cylinder, the driving roller and the driven roller are arranged on the frame and opposite to each other, for clamping the pipe to be measured, the pressing wheel is arranged on the frame and above the driving roller and the driven roller, the driving motor is arranged on the frame for driving the driving roller to rotate, and the cylinder is arranged on the frame for driving the pressing wheel to move downward to press the pipe to be measured. 7.The pipe wall thickness automatic detection device according to claim 6, characterized in that, The pressing rotating mechanism further comprises a distance adjusting unit, the driven roller is connected with the frame through the distance adjusting unit, and the distance adjusting unit is used for adjusting the distance between the driven roller and the driving roller. 8.The pipe wall thickness automatic detection device according to claim 7, characterized in that, The distance adjusting unit comprises an adjusting piece, a sliding block, a first adjusting nut and a second adjusting nut, the adjusting piece comprises a first side wall and a second side wall arranged opposite to each other, the adjusting piece is arranged on the frame, the sliding block is movably arranged in the adjusting piece, the driven roller is connected with the sliding block, the first adjusting nut penetrates through the first side wall of the adjusting piece and abuts against one side of the sliding block, the second adjusting nut penetrates through the second side wall of the adjusting piece and abuts against the other side of the sliding block, and when the first adjusting nut and the second adjusting nut are rotated, the sliding block moves, and the driven roller moves close to or away from the driving roller. 9.The pipe wall thickness automatic detection device according to claim 1, characterized in that, The clamping piece comprises a connecting part and a clamping part, the connecting part is rotatably connected with the second end of the upper floating plate and the second end of the lower floating plate respectively, and the clamping part is arranged on one side of the connecting part facing the side plate, for clamping the measuring rod. 10.The pipe wall thickness automatic detection device according to claim 9, characterized in that, The clamping part is provided with a clamping hole and a slit, the clamping hole and the slit respectively penetrate through the clamping part along the thickness direction of the clamping part, the slit communicates with the clamping hole, and when the size of the slit is reduced, the clamping hole can clamp the measuring rod. 11.The pipe wall thickness automatic detection device according to claim 1, characterized in that, The horizontal moving mechanism comprises a fixed plate, a horizontal guide rail and a motor, the elastic clamping mechanism is arranged on the fixed plate, the horizontal guide rail is arranged in the length direction of the pipe to be measured, the fixed plate is movably arranged on the horizontal guide rail, and the motor is arranged on the fixed plate and drives the fixed plate to move along the horizontal guide rail.

12. A detection method of a pipe wall thickness automatic detection device, characterized by, The detection method comprises: The pressing rotating mechanism drives the pipe to rotate along the circumferential direction at a preset speed; The horizontal moving mechanism drives the measuring rod of the Hall measuring mechanism to move along the length direction of the pipe to measure the thickness of the pipe at different positions.

13. A method of detecting a pipe wall thickness by a pipe wall thickness automatic detection apparatus, characterized by, The pipe wall thickness automatic detection device is the pipe wall thickness automatic detection device according to any one of claims 1-11, and the detection method comprises: Step one: the pressing rotating mechanism drives the pipe to rotate along the circumferential direction by a preset angle and then stop; Step two: the horizontal moving mechanism drives the measuring rod of the Hall measuring mechanism to move along the length direction of the pipe; Repeat the above step one and step two until the pipe rotates one circle.

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