Steel pipe diameter detection device

Abstract

The invention belongs to measuring equipment, particularly relates to the field of steel pipe diameter detection, and discloses a steel pipe diameter detection device which comprises a handle, a sleeve is provided with a measuring mechanism, and the measuring mechanism penetrates through one end of the sleeve and is in threaded connection with the outer side of a lead screw. According to the steel pipe diameter detection device, measurement can be carried out from the end portion of a steel pipe or from the side face of the steel pipe, measurement modes are diversified, a supporting cylinder and a sleeve are held to rotate a handle, a lead screw rotates to drive a sliding block, a limiting rod and a first piston to move rightwards, and two first abutting balls abut against the inner wall of the steel pipe; when the distance between the two first abutting balls reaches the maximum, the distance between the outer walls of the two first abutting balls is the inner diameter of the steel pipe, due to the fact that the distance between the initial positions of the two first abutting balls is fixed and known, the moving distance of the first abutting balls can be known by observing the first scales, and the thickness of the side wall of the steel pipe can be known by observing the second scales. Therefore, the outer diameter of the steel pipe can be calculated.

Description

Technical Field

[0001] This invention pertains to measuring equipment, and more specifically to the field of steel pipe diameter detection, and more specifically to a steel pipe diameter detection device. Background Technology

[0002] Steel pipes are hollow steel products whose length is much greater than their diameter or circumference. They are classified by material into carbon structural steel pipes, low-alloy structural steel pipes, alloy steel pipes, and composite steel pipes. By application, they are classified into pipes for transportation, engineering structures, thermal equipment, petrochemical industry, machinery manufacturing, geological drilling, and high-pressure equipment. By manufacturing process, they are classified into seamless steel pipes and welded steel pipes. Seamless steel pipes are further divided into hot-rolled and cold-rolled (drawn) types, while welded steel pipes are divided into straight-seam welded steel pipes and spiral-seam welded steel pipes. Steel pipe diameter measurement involves measuring the diameter at a cross-sectional position on the outer or inner wall of the steel pipe.

[0003] For example, a typical steel pipe diameter detection device in the prior art is described in patent number CN119063675B. This device includes a fixed platform, a steel pipe outer diameter detection mechanism, and a steel pipe inner diameter detection mechanism. The outer diameter detection mechanism includes a steel pipe guiding assembly positioned above the fixed platform. An outer diameter detection assembly is positioned between two sets of steel pipe guiding assemblies. Length measuring assemblies are respectively positioned on one side of each of the two sets of outer diameter detection assemblies. When the inner diameter detection mechanism moves, if a depression or bulge appears on the inner wall of the steel pipe, a large spring pushes a sliding vertical rod towards the inner wall of the steel pipe, or the inner wall of the steel pipe presses against a bonding plate, causing the sliding vertical rod to move into a sliding groove. As the sliding vertical rod moves, it drives a small gear to rotate. The detection assembly within the connecting block monitors the rotation amplitude of the small gear to determine the moving distance of the sliding vertical rod, thus obtaining data information on the depression or bulge inside the steel pipe. This information is then uploaded to the control board for display. The detection is convenient and fast, and does not affect subsequent steel pipe repair work.

[0004] For example, a typical example of a steel pipe diameter measuring device in the prior art is authorized by CN118362022B, which describes an inner and outer diameter measuring device for the production and processing of austenitic stainless steel seamless pipes. This diameter measuring device includes a mounting plate, an inner measuring rod, a guide rod, a push-pull plate, a second spring, a guide plate, and a telescopic top rod. A guide rod is mounted on the left side wall of the mounting plate, and a limit plate and a guide plate are connected to the left end of the guide rod. A telescopic top rod is slidably inserted into the left end of each guide plate. The inner measuring rod is hinged to the inner measuring rod at its inward-facing end via a hinge plate. The right end of the inner measuring rod slides through the limit plate and is connected to a push-pull plate, which is sleeved on the guide rod. This invention measures the inner and outer diameters of the steel pipe by horizontally placing the steel pipe to be measured outside the inner measuring rod, using the inner measuring rod to push the telescopic top rod into contact with the inner wall of the steel pipe, and simultaneously, by the top block of the outer measuring rod contacting the outer wall of the steel pipe. The inner and outer diameters of the steel pipe can then be quickly measured by reading the scale lines and the scale value on the ruler.

[0005] For example, a typical steel pipe diameter detection device in the prior art is illustrated by patent number CN114964024B, a steel pipe measuring device comprising: a calibration module for calibrating 3D cameras distributed on each side of a hexagonal cross-section bar to obtain a transformation matrix from the 3D camera coordinate system to the object space coordinate system; an acquisition and conversion module for mapping the coordinates of the steel pipe surface acquired by the calibrated 3D camera in the camera coordinate system to the object space coordinate system through the transformation matrix to obtain the coordinates of the steel pipe surface in the object space coordinate system, wherein the steel pipe is coaxially replaced by the bar after calibrating the 3D camera; and a diameter calculation module for obtaining the diameter of the steel pipe based on the coordinates of the steel pipe surface in the object space coordinate system using the least squares method with a circular equation as the final fitting target. This invention enables automatic detection of pipe diameter, ensuring the accuracy and timeliness of steel pipe quality assessment.

[0006] Existing steel pipe diameter measuring devices can generally only measure the end face of the steel pipe. When the steel pipe is already buried underground and the end is not exposed, it is difficult to complete the diameter measurement. The end measurement method has significant limitations and is not flexible or convenient to use. To address these issues, existing equipment needs to be improved. Summary of the Invention

[0007] The purpose of this invention is to provide a steel pipe diameter detection device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a steel pipe diameter detection device, comprising a handle, a support cylinder rotatably connected to the outside of the handle, a sleeve fixed to one side of the support cylinder, a lead screw fixed to one end of the handle, the lead screw rotatably connected to one end of the sleeve, a measuring mechanism provided on the sleeve, the measuring mechanism passing through one end of the sleeve and threadedly connected to the outside of the lead screw.

[0009] Preferably, two limiting rings are fixed on the outer side of the handle, and slots are evenly opened on the outer circumference of the handle. The support cylinder is rotatably connected between the two limiting rings, and the support cylinder is connected to the handle through a spiral spring. A calculator is fixed on the top of the support cylinder.

[0010] By adopting the above technical solution, the handle can rotate relative to the support cylinder, and the two limiting rings can play a limiting role.

[0011] Preferably, the inner bottom of the support cylinder is provided with a groove, and a first compression spring is fixed in the groove. A locking block is fixed on the top of the first compression spring, and the locking block is slidably connected in the groove. The locking block is engaged in one of the slots. A pull ring is fixed on the bottom of the locking block, and the pull ring passes through the bottom of the support cylinder.

[0012] By adopting the above technical solution, when the support cylinder is fixed and the handle is rotated, the locking block automatically engages in the slot, achieving a self-locking effect.

[0013] Preferably, the measuring mechanism includes a slider, which is threaded to the outside of the lead screw. Limiting rods are symmetrically fixed on both sides of one end face of the slider, and both limiting rods pass through one end of the sleeve and are connected to the first oil cylinder. The first oil cylinder is symmetrically fixed on both sides of the inner wall of the sleeve, and a first piston is slidably connected inside the first oil cylinder.

[0014] By adopting the above technical solution, when the handle and lead screw are rotated, the slider, the two limit rods and the two first pistons move to the right.

[0015] Preferably, a second oil cylinder is symmetrically fixed on both sides of the other end of the sleeve, and the second oil cylinder is connected to the first oil cylinder through a first connecting pipe. A second piston is slidably connected inside the second oil cylinder, and a movable frame is fixed on the outside of the second piston. The movable frame passes through the outer end of the second oil cylinder and is connected to the third oil cylinder. A first scale is provided on the front side of one of the movable frames.

[0016] By adopting the above technical solution, when the first piston moves to the right, the second piston moves under the action of oil pressure, thereby driving the movable frame and the third oil cylinder to move.

[0017] Preferably, a third hydraulic cylinder is fixed to one side of the movable frame, and a second compression spring is fixed inside the third hydraulic cylinder. A third piston is fixed to one end of the second compression spring, and the third piston is slidably connected inside the third hydraulic cylinder. A first movable rod is fixed to one side of the third piston, and the first movable rod passes through one end of the third hydraulic cylinder and is connected to a first abutment ball. A stop plate is fixed to the outside of the first movable rod, and a second scale is provided on the front side of one of the stop plates.

[0018] By adopting the above technical solution, when measuring from the end of the material, the two first abutting balls move away from each other and abut against the inner wall of the steel pipe. When both first abutting balls have moved to the bottom, the inner and outer diameters of the steel pipe can be calculated.

[0019] Preferably, an annular oil pipe is fixed on the inner wall of the sleeve, and the annular oil pipe is connected to two third oil cylinders through a second connecting pipe. The annular oil pipe passes through the top of the sleeve and is connected to a fourth oil cylinder. The fourth oil cylinder is fixed on the top of the sleeve. A fourth piston is slidably connected inside the fourth oil cylinder, and a marking block is fixed on the top of the fourth piston.

[0020] By adopting the above technical solution, when measuring from the side of the steel pipe, two first abutment balls need to be placed against the outside of the steel pipe. When the mark block is observed to emerge, it indicates that the two first abutment balls have been in place.

[0021] Preferably, a fifth oil cylinder is fixed on the other inner wall of the sleeve, and a third compression spring is fixed inside the fifth oil cylinder. A fifth piston is fixed to one end of the third compression spring, and the fifth piston is slidably connected inside the fifth oil cylinder. A second movable rod is fixed to one side of the fifth piston, and the second movable rod passes through one end of the fifth oil cylinder and the other end of the sleeve and is connected to the second abutment ball.

[0022] By adopting the above technical solution, when the two first abutting balls are pressed against the side of the steel pipe, the second abutting ball can be moved by the pressure.

[0023] Preferably, a sixth hydraulic cylinder is fixed to the inner bottom of the sleeve, and the sixth hydraulic cylinder penetrates the top of the sleeve. The sixth hydraulic cylinder is connected to the fifth hydraulic cylinder through a third connecting pipe, and a sixth piston is slidably connected inside the sixth hydraulic cylinder. A movable column is fixed to the top of the sixth piston, and the movable column penetrates the top of the sixth hydraulic cylinder. A third scale is provided on one side of the movable column.

[0024] By adopting the above technical solution, when the fifth piston moves to the left, the sixth piston and the movable column move upward.

[0025] Preferably, a through hole is provided on one side of the sixth oil cylinder, and a magnifying glass is fixed inside the through hole.

[0026] By adopting the above technical solution, the value of the third scale can be observed through a magnifying glass. The third scale marks the angle between the first and second balls.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This steel pipe diameter measuring device, through the coordinated use of a handle, support cylinder, sleeve, lead screw, slider, limit rod, first piston, second piston, movable frame, first scale, first abutment ball, abutment plate, and second scale, achieves diversified measurement methods. The device can measure from the end of the steel pipe or from its side, offering multiple measurement options. If measuring from the end is inconvenient, the outer diameter can be calculated by side measurement. For end-face measurement, two first abutment balls need to be inserted into the steel pipe, and two abutment plates need to be pressed firmly against the pipe's end, ensuring the device is placed horizontally. Then, the support cylinder can be... The support sleeve and sleeve are used to rotate the handle. The rotation of the lead screw drives the slider, limit rod and first piston to move to the right. The two second pistons move, and the two movable frames move and move away from each other. The two first abutment balls are pressed against the inner wall of the steel pipe. Then, the device can be moved while the handle is rotated. When the handle is rotated to the end, it means that the distance between the two first abutment balls has reached the maximum. At this time, the distance between the outer walls of the two first abutment balls is the inner diameter of the steel pipe. Since the initial distance between the two first abutment balls is fixed and known, the movement distance of the first abutment balls can be known by observing the first scale, and the thickness of the side wall of the steel pipe can be known by observing the second scale. Thus, the outer diameter of the steel pipe can be calculated.

[0028] 2. This steel pipe diameter measuring device, through the coordinated use of a first abutment ball, a marker block, a fifth piston, a second abutment ball, a sixth piston, a movable column, and a third scale, can achieve rapid measurement of the outer diameter from the side. When measuring from the side of the steel pipe, the two first abutment balls need to be pressed firmly against the outside of the steel pipe, and the device needs to be moved up and down simultaneously. When the marker block is observed to emerge, it indicates that both first abutment balls are firmly pressed against the steel pipe. At this time, the second abutment ball is aligned with the center of the steel pipe and is pressed against the steel pipe. The movement of the fifth piston drives the movement of the sixth piston and the movable column. The third scale marks the angle between the first and second abutment balls. The outer diameter of the steel pipe can be calculated by conversion. This measurement method is fast and convenient.

[0029] 3. This steel pipe diameter detection device can achieve self-locking through the coordinated use of the handle, slot, support cylinder, locking block and sleeve. When measuring from the end face of the steel pipe, the support cylinder and sleeve need to be fixed and the handle rotated. The locking block will automatically lock into the slot, which facilitates the self-locking effect. Attached Figure Description

[0030] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0031] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention; Figure 3 This is a frontal cross-sectional view of the present invention. Figure 4 This is a three-dimensional structural diagram of the measuring mechanism of the present invention; Figure 5 This is a frontal cross-sectional view of the measuring mechanism of the present invention; Figure 6 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 8 This is a schematic diagram of the connection structure of the handle, slot, support cylinder, first compression spring, locking block and pull ring of the present invention.

[0033] In the diagram: 1. Handle; 2. Limiting ring; 3. Slot; 4. Spiral spring; 5. Support cylinder; 6. Calculator; 7. Groove; 8. First compression spring; 9. Locking block; 10. Pull ring; 11. Sleeve; 12. Lead screw; 13. Measuring mechanism; 1301. Slider; 1302. Limiting rod; 1303. First hydraulic cylinder; 1304. First piston; 1305. First connecting pipe; 1306. Second hydraulic cylinder; 1307. Second piston; 1308. Movable frame; 1309. First scale; 1310. Third hydraulic cylinder; 1311. Second compression spring; 1312. Third piston; 1313. 1314. First movable rod; 1315. First stop ball; 1316. Stop plate; 1317. Second scale; 1318. Second connecting pipe; 1319. Annular oil pipe; 1320. Fourth oil cylinder; 1321. Fourth piston; 1322. Marker block; 1322. Fifth oil cylinder; 1323. Third compression spring; 1324. Fifth piston; 1325. Second movable rod; 1326. Second stop ball; 1327. Third connecting pipe; 1328. Sixth oil cylinder; 1329. Sixth piston; 1330. Movable column; 1331. Third scale; 1332. Through hole; 1333. Magnifying glass. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1 to 8 The present invention provides a technical solution: a steel pipe diameter detection device, including a handle 1, a support cylinder 5 rotatably connected to the outside of the handle 1, a sleeve 11 fixed to one side of the support cylinder 5, a lead screw 12 fixed to one end of the handle 1, the lead screw 12 rotatably connected to one end of the sleeve 11, a measuring mechanism 13 provided on the sleeve 11, the measuring mechanism 13 passing through one end of the sleeve 11 and threadedly connected to the outside of the lead screw 12.

[0036] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, two limiting rings 2 are fixed on the outer side of the handle 1, and slots 3 are evenly opened on the outer circumference of the handle 1. The support cylinder 5 is rotatably connected between the two limiting rings 2, and the support cylinder 5 is connected to the handle 1 through a spiral spring 4. A calculator 6 is fixed on the top of the support cylinder 5. The two limiting rings 2 play a limiting role for the support cylinder 5. When using the device, you need to hold the support cylinder 5 and rotate the handle 1. The handle 1 rotates relative to the support cylinder 5. During this process, the support cylinder 5 and the handle 1 can be self-locked together. After releasing the lock between the support cylinder 5 and the handle 1 and releasing the handle 1, the handle 1 can automatically rotate back under the action of the spiral spring 4.

[0037] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 8 As shown, a groove 7 is provided at the bottom of the inner part of the support cylinder 5, and a first compression spring 8 is fixed in the groove 7. A locking block 9 is fixed at the top of the first compression spring 8, and the locking block 9 is slidably connected in the groove 7. The locking block 9 is engaged in one of the slots 3. A pull ring 10 is fixed at the bottom of the locking block 9, and the pull ring 10 passes through the bottom of the support cylinder 5. When the handle 1 is rotated relative to the support cylinder 5, the locking block 9 will automatically engage in the slot 3 to achieve a self-locking effect. After holding the pull ring 10 and pulling the locking block 9 down to make it leave the slot 3, the lock between the support cylinder 5 and the handle 1 can be unlocked. After releasing the handle 1, the handle 1 will automatically rotate relative to the support cylinder 5.

[0038] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the measuring mechanism 13 includes a slider 1301, which is threaded to the outside of the lead screw 12. Limiting rods 1302 are symmetrically fixed on both sides of one end face of the slider 1301, and both limiting rods 1302 pass through one end of the sleeve 11 and are connected to the first oil cylinder 1303. The first oil cylinder 1303 is symmetrically fixed on both sides of an inner wall of the sleeve 11, and a first piston 1304 is slidably connected inside the first oil cylinder 1303. When the support cylinder 5 and the sleeve 11 are fixed and the handle 1 and the lead screw 12 are manually rotated, the slider 1301 and the two limiting rods 1302 can move to the right under the limiting action of the lead screw 12 and the sleeve 11, thereby driving the two first pistons 1304 to move to the right, so as to facilitate the expulsion of hydraulic oil from the two first oil cylinders 1303.

[0039] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, two symmetrical second oil cylinders 1306 are fixed on both sides of the other end of the sleeve 11. The second oil cylinders 1306 are connected to the first oil cylinder 1303 through the first connecting pipe 1305. A second piston 1307 is slidably connected inside the second oil cylinder 1306. A movable frame 1308 is fixed on the outside of the second piston 1307. The movable frame 1308 passes through the outer end of the second oil cylinder 1306 and is connected to the third oil cylinder 1310. A first scale 1309 is provided on the front side of one of the movable frames 1308. The first connecting pipe 1305 serves to connect the second oil cylinder 1306 and the first oil cylinder 1303. When the first piston 1304 moves to the right, the second piston 1307 can move under the action of oil pressure, thereby driving the movable frame 1308 to move. The moving distance of the movable frame 1308 can be known by observing the first scale 1309.

[0040] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a third hydraulic cylinder 1310 is fixed to one side of the movable frame 1308, and a second compression spring 1311 is fixed inside the third hydraulic cylinder 1310. A third piston 1312 is fixed to one end of the second compression spring 1311, and the third piston 1312 is slidably connected inside the third hydraulic cylinder 1310. A first movable rod 1313 is fixed to one side of the third piston 1312, and the first movable rod 1313 passes through one end of the third hydraulic cylinder 1310 and is connected to a first abutment ball 1314. A stop plate 1315 is fixed to the outside of the first movable rod 1313, and a second scale 1316 is provided on the front side of one of the stop plates 1315. When measuring the diameter of the steel pipe end face, both stop plates 1315 need to be placed against the end of the steel pipe. The device is positioned so that it is level with the steel pipe. When measuring the diameter of the steel pipe, the two second pistons 1307 can move under the action of oil pressure, the two third cylinders 1310 move away from each other, and the two first abutting balls 1314 move away from each other and abut against the inner wall of the steel pipe. When the device is aligned with the center of the steel pipe, if the two second pistons 1307 can no longer move, it means that the midpoint of the line connecting the two first abutting balls 1314 is the center point of the steel pipe. The diameter of the steel pipe can then be calculated. When measuring the diameter on the side of the steel pipe, the two first abutting balls 1314 need to be pressed tightly against the outside of the steel pipe, and the two second compression springs 1311 need to be compressed to the bottom to ensure that the device is aligned with the center of the steel pipe for subsequent accurate measurement.

[0041] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, an annular oil pipe 1318 is fixed on the inner wall of the sleeve 11, and the annular oil pipe 1318 is connected to two third oil cylinders 1310 through a second connecting pipe 1317. The annular oil pipe 1318 passes through the top of the sleeve 11 and is connected to a fourth oil cylinder 1319, which is fixed to the top of the sleeve 11. A fourth piston 1320 is slidably connected inside the fourth oil cylinder 1319, and a marking block 1321 is fixed on the top of the fourth piston 1320. The annular oil pipe 1318 and the second connecting pipe 1317 are connected to the sleeve 11. 317 serves to connect the fourth oil cylinder 1319 and the two third oil cylinders 1310. When measuring the diameter on the side of the steel pipe, the two first abutment balls 1314 need to be placed against the outside of the steel pipe and in place. The third piston 1312 slides to the left inside the third oil cylinder 1310. The fourth piston 1320 moves upward under the action of oil pressure, thereby driving the marker block 1321 to move upward. When the inspector observes that the marker block 1321 emerges from the fourth oil cylinder 1319, it indicates that the device has been aligned with the center of the steel pipe.

[0042] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, a fifth cylinder 1322 is fixed on the other inner wall of the sleeve 11, and a third compression spring 1323 is fixed inside the fifth cylinder 1322. A fifth piston 1324 is fixed to one end of the third compression spring 1323, and the fifth piston 1324 is slidably connected inside the fifth cylinder 1322. A second movable rod 1325 is fixed to one side of the fifth piston 1324, and the second movable rod 1325 passes through one end of the fifth cylinder 1322 and the other end of the sleeve 11 and is connected to the second abutment ball 1326. When measuring the diameter on the side of the steel pipe, the two first abutment balls 1314 need to be placed against the side of the steel pipe and in place. At this time, the second abutment ball 1326 is aligned with the center point of the steel pipe. The fifth piston 1324 slides to the left inside the fifth cylinder 1322. Then the outer diameter of the steel pipe can be calculated.

[0043] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, a sixth hydraulic cylinder 1328 is fixed to the inner bottom of the sleeve 11, and the sixth hydraulic cylinder 1328 penetrates the top of the sleeve 11. The sixth hydraulic cylinder 1328 is connected to the fifth hydraulic cylinder 1322 through the third connecting pipe 1327, and a sixth piston 1329 is slidably connected inside the sixth hydraulic cylinder 1328. A movable column 1330 is fixed to the top of the sixth piston 1329, and the movable column 1330 penetrates the top of the sixth hydraulic cylinder 1328. A third scale 1331 is provided on one side of the movable column 1330. The third connecting pipe 1327 serves to connect the sixth hydraulic cylinder 1328 and the fifth hydraulic cylinder 1322. When the fifth piston 1324 moves to the left, the sixth piston 1329 can move upward under the action of hydraulic pressure, thereby driving the movable column 1330 to move upward. The third scale 1331 marks the angle between the first abutment ball 1314 and the second abutment ball 1326 when the first abutment ball 1314 is in the bottom position. The outer diameter of the steel pipe can be obtained by conversion.

[0044] In this embodiment, as Figure 1 , Figure 3 and Figure 5 As shown, a through hole 1332 is provided on one side of the sixth oil cylinder 1328, and a magnifying glass 1333 is fixed inside the through hole 1332. The value on the third scale 1331 can be observed through the magnifying glass 1333. After reading the value on the third scale 1331, the outer diameter of the steel pipe can be calculated.

[0045] The method of use and advantages of this invention: The working process of this steel pipe diameter detection device is as follows: like Figures 1 to 8As shown: This device can measure the diameter of a steel pipe from either the end or the side. If measuring from the end, hold handle 1 and insert the two first abutment balls 1314 into the pipe. Place the two abutment plates 1315 against the end of the pipe. The third piston 1312 moves to the left within the third cylinder 1310, while the fourth piston 1320 and the marker block 1321 move upwards. When the marker block 1321 protrudes, it indicates that the two abutment plates 1315 are in place, ensuring the device is horizontally aligned with the pipe. Next, fix the support cylinder 5 and sleeve 11 and rotate handle 1. The screw 12 rotates, driving the slider 1301 and the two limit rods. 1302 and the two first pistons 1304 move to the right, and the two second pistons 1307 move under hydraulic pressure. The two first abutment balls 1314 move away from each other and abut against the inner wall of the steel pipe. While rotating handle 1, move the entire device until handle 1 is rotated to the bottom. By observing the first scale 1309, the opening distance of the first abutment balls 1314 can be determined. By observing the second scale 1316, the thickness of the steel pipe sidewall can be determined. Since the initial distance between the two first abutment balls 1314 is known, the inner and outer diameters of the steel pipe can be calculated. During the rotation of handle 1, the locking block 9 automatically engages in the locking groove 3, facilitating a self-locking effect. When the spiral spring 4 twists, the hand holds the pull ring 10 and pulls the locking block 9 downwards to make it leave the locking groove 3. Then, the handle 1 automatically rotates back to its original position under the action of the spiral spring 4. The movable frame 1308 retracts into the second oil cylinder 1306. If measured from the side of the steel pipe, the two first abutment balls 1314 are placed against the outside of the steel pipe, and the device is moved up and down at the same time until the two third pistons 1312 have moved to the bottom in the corresponding third oil cylinder 1310. When the marker block 1321 is observed to emerge, it indicates that the two first abutment balls 1314 have reached the bottom, the second abutment ball 1326 has been aligned with the center of the steel pipe, and the second abutment ball 1326 is against the steel pipe. The fifth piston 1324 is in the... The fifth cylinder 1322 moves to the left, and the sixth piston 1329 moves upward under the action of oil pressure, thereby driving the movable column 1330 to move upward. The third scale 1331 marks the angle between the first abutment ball 1314 and the second abutment ball 1326. The value of the third scale 1331 can be observed through the magnifying glass 1333. The two abutment balls 1314 and 1326 form an isosceles triangle. Since the distance between the first abutment balls 1314 and 1326 is fixed and known, the angle between the first abutment balls 1314 and 1326 can be observed. According to the sine theorem, the length of the leg of the isosceles triangle can be calculated, and then according to the radius formula... Where a is the waist length and b is the base, which is the distance between the two first abutment balls 1314. This gives us the outer diameter 2R of the steel pipe. Calculator 6 can be used to assist in the calculation.

[0046] In summary, this steel pipe diameter detection device achieves the goals of diversified measurement methods, rapid measurement of outer diameter from the side, and self-locking, thus meeting people's usage needs.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0048] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel pipe diameter detection device comprising a handle (1), characterized in that: The outer side of the handle (1) is rotatably connected with a supporting cylinder (5), one side of the supporting cylinder (5) is fixedly connected with a sleeve (11), one end of the handle (1) is fixedly connected with a lead screw (12), the lead screw (12) is rotatably connected with one end of the sleeve (11), and the sleeve (11) is provided with a measuring mechanism (13) penetrating one end of the sleeve (11) and being threadedly connected with the outer side of the lead screw (12).

2. The steel pipe diameter detection device according to claim 1, characterized by: The outer side of the handle (1) is fixedly connected with two limiting rings (2), and the outer side of the handle (1) is uniformly and circumferentially provided with clamping grooves (3), the supporting cylinder (5) is rotatably connected between the two limiting rings (2), and the supporting cylinder (5) is connected with the handle (1) through a volute spring (4), and the top of the supporting cylinder (5) is fixedly connected with a calculator (6).

3. The steel pipe diameter detection device according to claim 1, characterized in that: The inner bottom of the supporting cylinder (5) is provided with a groove (7), and the first compression spring (8) is fixedly connected in the groove (7), the top of the first compression spring (8) is fixedly connected with a clamping block (9), the clamping block (9) is slidably connected in the groove (7), the clamping block (9) is clampingly connected in one of the clamping grooves (3), and the bottom of the clamping block (9) is fixedly connected with a pull ring (10) penetrating the bottom of the supporting cylinder (5).

4. The device for detecting the diameter of a steel pipe according to claim 1, characterized in that: The measuring mechanism (13) comprises a sliding block (1301) which is threadedly connected with the outer side of the lead screw (12), limit rods (1302) are symmetrically fixed on the two sides of one end surface of the sliding block (1301), both of the two limit rods (1302) penetrate one end of the sleeve (11) and are connected with a first oil cylinder (1303), the first oil cylinder (1303) is symmetrically fixed on the two sides of an inner wall of the sleeve (11), and a first piston (1304) is slidably connected in the first oil cylinder (1303).

5. A device for detecting the diameter of a steel pipe according to claim 4, characterized in that: Second oil cylinders (1306) are symmetrically fixed on the two sides of the other end of the sleeve (11), the second oil cylinders (1306) are connected with the first oil cylinder (1303) through first connecting pipelines (1305), a second piston (1307) is slidably connected in the second oil cylinder (1306), and movable racks (1308) are fixedly connected with the outer sides of the second piston (1307), the movable racks (1308) penetrate the outer ends of the second oil cylinders (1306) and are connected with third oil cylinders (1310), and a first scale (1309) is arranged on the front side of one of the movable racks (1308).

6. A device for detecting the diameter of a steel pipe according to claim 5, characterized in that: One side of the movable frame (1308) is fixed with a third oil cylinder (1310), and a second compression spring (1311) is fixed in the third oil cylinder (1310), one end of the second compression spring (1311) is fixed with a third piston (1312), and the third piston (1312) is slidingly connected in the third oil cylinder (1310), one side of the third piston (1312) is fixed with a first movable rod (1313), and one end of the first movable rod (1313) penetrates the third oil cylinder (1310) and is connected with a first stop ball (1314), the outer side of the first movable rod (1313) is fixed with a stop plate (1315), and the front side of one of the stop plates (1315) is provided with a second scale (1316).

7. A device for detecting the diameter of a steel pipe according to claim 6, characterized in that: The inner wall of the sleeve (11) is fixed with an annular oil pipe (1318), and the annular oil pipe (1318) is connected with the two third oil cylinders (1310) through a second connecting pipeline (1317), the annular oil pipe (1318) penetrates the top of the sleeve (11) and is connected with a fourth oil cylinder (1319), and the fourth oil cylinder (1319) is fixed on the top of the sleeve (11), a fourth piston (1320) is slidingly connected in the fourth oil cylinder (1319), and a mark block (1321) is fixed on the top of the fourth piston (1320).

8. The device for detecting the diameter of a steel pipe according to claim 1, characterized in that: The other inner wall of the sleeve (11) is fixed with a fifth oil cylinder (1322), and a third compression spring (1323) is fixed in the fifth oil cylinder (1322), one end of the third compression spring (1323) is fixed with a fifth piston (1324), and the fifth piston (1324) is slidingly connected in the fifth oil cylinder (1322), one side of the fifth piston (1324) is fixed with a second movable rod (1325), and one end of the second movable rod (1325) penetrates the fifth oil cylinder (1322) and the other end of the sleeve (11) and is connected with a second stop ball (1326).

9. A device for detecting the diameter of a steel pipe according to claim 8, characterized in that: The inner bottom of the sleeve (11) is fixed with a sixth oil cylinder (1328), and the sixth oil cylinder (1328) penetrates the top of the sleeve (11), the sixth oil cylinder (1328) is connected with the fifth oil cylinder (1322) through a third connecting pipeline (1327), and a sixth piston (1329) is slidingly connected in the sixth oil cylinder (1328), a movable column (1330) is fixed on the top of the sixth piston (1329), and the movable column (1330) penetrates the top of the sixth oil cylinder (1328), one side of the movable column (1330) is provided with a third scale (1331).

10. A device for detecting the diameter of a steel pipe according to claim 9, characterized in that: One side of the sixth oil cylinder (1328) is provided with a through hole (1332), and a magnifying glass (1333) is fixed in the through hole (1332).

Images