A detection device for oil drill pipe joints

Abstract

The present invention relates to the technical field of detection equipment, and provides a detection equipment for oil drill pipe joints. It comprises a detection platform, the detection platform is fixedly connected to an electric slide rail, the electric slider of the electric slide rail is fixedly connected to a support ring through a mounting plate, the support ring is fixedly connected to a symmetrical first telescopic rod, the symmetrical first telescopic rods are commonly fixedly connected to a connecting shell, a slide plate is slidably connected in the connecting shell, the slide plate is spline-connected to a spline rod, the lower end of the spline rod is rotatably connected to an electric turret, the electric turret is installed with a symmetrical laser rangefinder, and the slide plate is fixedly connected to circumferentially equidistant springs through a fixed column. The present invention utilizes arc-shaped springs to adjust the position of the slide plate, and then adjusts the position of the electric turret and the laser rangefinder, so that the two laser rangefinders are at the same distance from the inner wall of the drill pipe joint, and the two laser rangefinders compare with the measured values, so that the abnormal position of the drill pipe joint value can be quickly inspected.

Description

Technical Field

[0001] The invention relates to the technical field of detection equipment and provides a detection equipment for oil drill pipe joints. Background Art

[0002] The oil drill pipe joint, or commonly known as the drill pipe joint, plays a vital connecting and supporting role in oil drilling operations. It is mainly responsible for transmitting torque, bearing bit pressure, and transporting drilling fluid. It is an indispensable link between the drill pipe and the drilling tool.

[0003] Drill pipe joint inspection is an important step in ensuring the safety and efficiency of drilling operations. By detecting the diameters at different locations within the drill pipe joint, the smooth flow of the internal fluid can be ensured. However, existing inspection tools for drill pipe joints mostly use mechanical measuring tools such as vernier calipers and internal diameter gauges, or electronic internal diameter measuring instruments. The inspection tools introduced above are basically operated by workers. However, workers will become fatigued after long-term measurements, which seriously affects the accuracy and efficiency of inspections. At the same time, the above devices need to ensure the placement angle and placement of the inspection devices during measurement, otherwise the detection values ​​will be inaccurate and cause misjudgment. Summary of the Invention

[0004] The present invention provides a detection device for oil drill pipe joints to solve the above problems existing in the existing oil drill pipe joint detection devices.

[0005] The technical implementation scheme of the present invention is: a detection device for oil drill pipe joints, including a detection platform, a controller is installed on one side of the detection platform, the detection platform is fixedly connected to an electric slide rail, the electric slider of the electric slide rail is fixedly connected to a support ring through a mounting plate, the electric slider of the electric slide rail is electrically connected to the controller, the support ring is fixedly connected to a symmetrical first telescopic rod, the support ring is fixedly connected to the telescopic end of the first telescopic rod, a connecting shell is fixedly connected between the symmetrical first telescopic rods, a through hole is provided in the middle of the connecting shell, a slide is slidably connected in the connecting shell, the The skateboard is spline-connected with a spline rod, and the spline rod passes through the through hole of the connecting shell. A limit plate is installed on the upper end of the spline rod, and a first elastic member is fixedly connected between the limit plate of the spline rod and the skateboard. The lower end of the spline rod is rotatably connected to an electric turret, and the electric turret is electrically connected to the controller. The electric turret is equipped with a symmetrical laser rangefinder, and the laser rangefinder is electrically connected to the controller. The connecting shell is provided with circumferentially evenly spaced slide grooves, and the skateboard is fixed with circumferentially evenly spaced springs through fixed columns, and the fixed columns of the springs are located in adjacent slide grooves of the connecting shell.

[0006] Furthermore, the spring pieces are arranged in an arc shape, and are squeezed and matched with the joint to adjust the position of the slide. The elastic force of the spring pieces with equal circumferential spacing is smaller than the gravity of the slide.

[0007] Furthermore, the diameter of the circular hole in the middle of the connecting shell is smaller than the diameter of the slide plate, so as to ensure that the connecting shell and the slide plate are in a fitted state.

[0008] Furthermore, it also includes an auxiliary stabilization mechanism, which is arranged between the connecting shell and the symmetrical first telescopic rod, and the auxiliary stabilization mechanism is used to improve the stability of the slide. The auxiliary stabilization mechanism includes a symmetrical second elastic member, and the symmetrical second elastic members are respectively sleeved on the telescopic ends of adjacent first telescopic rods, and the two ends of the second elastic member are respectively fixed to the adjacent first telescopic rods and the support ring. The connecting shell is fixed with a symmetrical second telescopic rod, and an oil guide pipe is connected between the first telescopic rod and the adjacent second telescopic rod. The first telescopic rod and the adjacent oil guide pipe are filled with hydraulic oil, and an extrusion ring is fixed between the telescopic ends of the symmetrical second telescopic rods. The extrusion ring slides with the connecting shell, the spline rod passes through the extrusion ring, and the extrusion ring contacts and cooperates with the slide. A drive assembly is provided between the support ring and the electric slider of the electric slide rail, and the drive assembly is used to change the position of the spline rod.

[0009] Furthermore, a gap is provided between the extrusion ring and the connection shell, the width of the gap between the extrusion ring and the connection shell is the same as the thickness of the slide plate, and an elastic material ring is provided at the lower part of the extrusion ring.

[0010] Furthermore, the elastic force of the symmetrical second elastic members is greater than the elastic force of the elastic sheets that are equidistantly spaced in the circumferential direction.

[0011] Furthermore, the drive assembly includes a first electric push rod, which is fixed to the mounting plate between the support ring and the electric slider of the electric slide rail. The telescopic end of the first electric push rod is fixed with a baffle, which is located above the spline rod, and the area of ​​the baffle is larger than the area of ​​the limit plate at the upper end of the spline rod.

[0012] Furthermore, it also includes a joint fixing mechanism, which is arranged on the lower side of the detection platform, and the joint fixing mechanism is used to pre-position the joint, and the joint fixing mechanism includes sliding rods distributed at equal intervals in the circumference, and the detection platform is provided with guide grooves distributed at equal intervals in the circumference, and the sliding rods distributed at equal intervals in the circumference are respectively slidably connected to the adjacent guide grooves of the detection platform, and the lower side of the detection platform is rotatably connected with a rotating ring, and the rotating ring is provided with inclined slide grooves distributed at equal intervals in the circumference, and the sliding rods distributed at equal intervals in the circumference are respectively slidably connected to the adjacent slide grooves of the rotating ring, and the rotating ring is fixed with a gear ring, and the lower side of the detection platform is fixed with a motor, and the motor is electrically connected to the controller, and the output shaft of the motor is fixed with a gear meshing with the gear ring, and the bottom of the detection platform is provided with an impurity cleaning component, and the impurity cleaning group is used to clean impurities adhered to the inner wall of the joint.

[0013] Furthermore, the impurity cleaning assembly includes a support plate, which is fixedly connected to the bottom of the detection platform, a second electric push rod is fixedly connected to one side of the support plate, the second electric push rod is electrically connected to the controller, the telescopic end of the second electric push rod is fixedly connected to a fixed sleeve, the fixed sleeve passes through the rotating ring and the detection platform, a sliding tube is slidably connected in the fixed sleeve, the fixed sleeve is hinged with hinged rods with circumferential equal intervals, a connecting plate is hinged between the sliding tube and the adjacent hinged rods, a nozzle is fixed to the hinged rod, the nozzle is connected to the sliding tube through an air guide tube, the sliding tube is connected to the air outlet of the gas injection equipment, the lower end of the sliding tube is fixedly connected to a counterweight block, and the counterweight block is limitedly matched with the support plate.

[0014] Furthermore, the central axis of the rotating ring coincides with the central axis of the sliding tube, which is used to clean impurities attached to the inner wall of the joint.

[0015] The beneficial effects of the present invention are as follows: 1. The present invention uses an arc-shaped spring piece to adjust the position of the slide plate, and then adjusts the positions of the electric rotary head and the laser rangefinder, so that the electric rotary head is located on the central axis of the drill rod joint, and the two laser rangefinders are at the same distance from the inner wall of the drill rod joint. The two laser rangefinders measure the inner diameter of the drill rod joint, and the values ​​measured by the two laser rangefinders are compared, which can quickly detect the abnormal position of the drill rod joint value and improve the measurement accuracy of the drill rod head.

[0016] 2. The present invention utilizes the extrusion ring and the connecting shell to limit the slide, thereby improving the stability of the slide and the spline rod, avoiding positional offset of the two laser rangefinders, and thus ensuring the accuracy of joint detection.

[0017] 3. The present invention utilizes six sliding rods to adjust and fix the position of the joint, thereby reducing the labor intensity of the staff. At the same time, the six sliding rods fix the joint, thereby improving the accuracy of joint detection. The high-pressure air sprayed by six nozzles is used to clean the impurities adhered to the inner wall of the joint, thereby avoiding the impurities adhered to the inner wall of the joint causing errors in the detection distance of the laser rangefinder, thereby causing misjudgment of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a side view of the supporting ring and connecting shell and other parts of the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the connecting shell and spline rod and other parts of the present invention;

[0021] Figure 4 It is a cross-sectional view of parts such as the support ring and the connecting shell of the present invention;

[0022] Figure 5 A cross-sectional view of the connecting shell and the extrusion ring of the present invention;

[0023] Figure 6 is a cross-sectional view of the detection platform of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the fixed sleeve and hinged rod and other parts of the present invention;

[0025] Figure 8 It is a cross-sectional view of parts such as the fixed sleeve and the sliding tube of the present invention.

[0026] The meaning of the reference numerals in the figure: 1-testing table, 2-controller, 3-electric slide rail, 4-support ring, 5-first telescopic rod, 6-connecting shell, 7-slide plate, 8-spline rod, 9-first elastic member, 10-electric rotary head, 11-laser rangefinder, 12-shrapnel, 13-second elastic member, 14-second telescopic rod, 15-extrusion ring, 16-first electric push rod, 161-baffle, 17-sliding rod, 18-rotating ring, 19-motor, 191-support plate, 20-second electric push rod, 21-fixed sleeve, 22-sliding tube, 23-hinge rod, 24-spray head, 25-counterweight. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Research has found that when inspecting oil drill pipe joints, workers typically use mechanical measuring tools such as vernier calipers and internal diameter gauges, or electronic internal diameter measuring instruments. This can lead to fatigue after prolonged testing, and requires workers to ensure the correct placement of the testing equipment, placing high demands on their measurement skills. Furthermore, these devices can introduce significant errors during testing. The following implementation method is being adopted to improve the inspection accuracy of drill pipe joints.

[0029] Example 1: A detection device for oil drill pipe joints, such as Figure 1-Figure 5As shown, it includes a detection table 1, a controller 2 is installed on the right side of the detection table 1 through a rotating frame, the controller 2 can swing arbitrarily on the rotating frame, the detection table 1 is fixed with an electric slide 3, the electric slide 3 is placed vertically, the electric slider of the electric slide 3 is fixed with a support ring 4 through a mounting plate, the electric slider of the electric slide 3 is electrically connected to the controller 2, the support ring 4 is located on the front side of the electric slide 3, the support ring 4 is fixed with two symmetrical first telescopic rods 5, the first telescopic rod 5 is an existing ordinary hydraulic rod, and its internal structure is not shown in the drawings, the support ring 4 and the first telescopic rod are fixedly connected. The telescopic end of the retractable rod 5 is fixed, and a connecting shell 6 is fixed between the lower ends of the two first telescopic rods 5. A through hole is provided in the middle of the connecting shell 6. A slide plate 7 is slidably connected in the connecting shell 6. The slide plate 7 is spline-connected to the spline rod 8. The spline rod 8 passes through the through hole of the connecting shell 6. A limit plate is installed on the upper end of the spline rod 8. A first elastic member 9 is fixed between the limit plate of the spline rod 8 and the slide plate 7. The first elastic member 9 is set as a spring. The first elastic member 9 is sleeved on the spline rod 8. The lower end of the spline rod 8 is rotatably connected to an electric turntable 10. The electric turntable 10 is an existing electric drive device , its internal structure is not shown in the attached drawings. The electric rotating head 10 is electrically connected to the controller 2. The electric rotating head 10 is equipped with two symmetrical laser rangefinders 11. The distance between the two laser rangefinders 11 detects the distance between the ends and the value measured by the two laser rangefinders 11 is the value of the inner diameter of the joint. The laser rangefinder 11 is electrically connected to the controller 2. The connecting shell 6 is provided with four circumferentially evenly spaced sliding grooves. The slide 7 is fixed with four circumferentially evenly spaced springs 12 through a fixing column. The four springs 12 are used to correct the position of the slide 7. The fixing column of the spring 12 is located in the connecting shell. 6 adjacent chute, the chute width of the connecting shell 6 is greater than the diameter of the fixing column of the spring piece 12, the spring piece 12 is set to an arc shape, and the spring piece 12 is squeezed and matched with the joint to adjust the position of the slide 7. When correcting the position of the slide 7, the fixing column of the spring piece 12 will move in the chute adjacent to the connecting shell 6. The elastic force of the four spring pieces 12 with equal circumferential spacing is less than the gravity of the slide 7. When the four spring pieces 12 are deformed, the slide 7 is always in contact with the connecting shell 6. The diameter of the circular hole in the middle of the connecting shell 6 is smaller than the diameter of the slide 7, which is used to ensure that the connecting shell 6 and the slide 7 are in contact.

[0030] When inspecting the inner diameter of the oil drill pipe joint, the staff places the joint to be inspected on the inspection table 1 and adjusts the position of the joint so that the joint is located below the connecting shell 6. The staff presses the start button of the controller 2, and then the controller 2 starts the electric slider on the electric slide rail 3. Driven by the electric slider, the support ring 4 drives the connecting shell 6 and the parts thereon to move downward through the two first telescopic rods 5. During the downward movement of the connecting shell 6, the four arc-shaped spring clips 12 contact the upper edge of the joint. After the four arc-shaped spring clips 12 are squeezed, the four arc-shaped spring clips 12 drive the slide plate 7 and the spline rod 8 thereon to slide along the connecting shell 6 through the fixed column until the four arc-shaped spring clips 12 are subjected to the same force, and then the center axis of the slide plate 7 coincides with the center axis of the joint. When the connecting shell 6 contacts the upper end of the joint, the controller 2 closes the electric slider of the electric slide rail 3 and controls the start of the electric rotary head 10 and the two laser rangefinders 11.

[0031] The electric turret 10 rotates circumferentially along the spline rod 8. The electric turret 10 drives two laser rangefinders 11 to detect different positions of the inner diameter of the joint. The laser rangefinder 11 transmits the detection value to the controller 2. The staff presses the spline rod 8 downward, and the spline rod 8 drives the electric turret 10 to move downward. The first elastic member 9 is compressed. Under the control of the staff, the two laser rangefinders 11 detect any position of the inner wall of the joint. After the two laser rangefinders 11 transmit the detection value to the controller 2, the controller 2 calculates the average value of the measured values ​​to determine whether the inner diameter of the joint is qualified.

[0032] When the joint inspection is completed, the staff slowly resets the spline rod 8, and at the same time the controller 2 turns off the electric turntable 10 and the two laser rangefinders 11, and the first elastic member 9 is also slowly reset. When the spline rod 8 is completely reset, the controller 2 starts the electric slider on the electric slide rail 3, and the electric slider drives the support ring 4 and the two first telescopic rods 5 to move upward. The two first telescopic rods 5 drive the connecting shell 6 and all parts thereon to move upward and reset. The controller 2 then turns off the electric slider on the electric slide rail 3 again, and the staff removes the joint after inspection from the inspection table 1.

[0033] Example 2: Based on Example 1, Figure 3-Figure 5As shown, an auxiliary stabilizing mechanism is also included, which is arranged between the connecting shell 6 and the symmetrical first telescopic rod 5. The auxiliary stabilizing mechanism is used to improve the stability of the skateboard 7. The auxiliary stabilizing mechanism includes two symmetrical second elastic members 13, and the two second elastic members 13 are set as springs. The two second elastic members 13 are respectively sleeved on the telescopic ends of adjacent first telescopic rods 5, and the two ends of the second elastic member 13 are respectively fixed to the adjacent first telescopic rod 5 and the support ring 4. The connecting shell 6 is fixed with two symmetrical second telescopic rods 14. The two second telescopic rods 14 are ordinary hydraulic rods, and their internal structure is not shown in the accompanying drawings. An oil guide pipe is connected between the first telescopic rod 5 and the adjacent second telescopic rod 14. The first telescopic rod 5 and the adjacent oil guide pipe are filled with hydraulic oil. When the telescopic end of the first telescopic rod 5 is retracted, the extension of the adjacent second telescopic rod 14 is The retracted end contracts, and an extrusion ring 15 is fixed between the telescopic ends of the two second telescopic rods 14. The extrusion ring 15 is located on the upper side of the skateboard 7. The extrusion ring 15 slides with the connecting shell 6. The spline rod 8 passes through the extrusion ring 15. The extrusion ring 15 contacts and cooperates with the skateboard 7. When the extrusion ring 15 squeezes the skateboard 7, the skateboard 7 is stabilized between the connecting shell 6 and the extrusion ring 15. A driving assembly is provided between the support ring 4 and the electric slider of the electric slide rail 3. The driving assembly is used to change the position of the spline rod 8. A gap is provided between the extrusion ring 15 and the connecting shell 6. The width of the gap between the extrusion ring 15 and the connecting shell 6 is the same as the thickness of the skateboard 7, and an elastic material ring is provided at the lower part of the extrusion ring 15. When the extrusion ring 15 does not squeeze the skateboard 7, the skateboard 7 slides normally between the extrusion ring 15 and the connecting shell 6. The elastic force of the two second elastic members 13 is greater than the elastic force of the four spring pieces 12.

[0034] like Figure 3 As shown, the drive assembly includes a first electric push rod 16, which is fixed to the mounting plate between the support ring 4 and the electric slider of the electric slide rail 3. The telescopic end of the first electric push rod 16 is fixed with a baffle 161, which is located above the spline rod 8. In the initial state, the baffle 161 does not contact the limit plate at the upper end of the spline rod 8. The area of ​​the baffle 161 is larger than the area of ​​the limit plate at the upper end of the spline rod 8, ensuring that the baffle 161 can squeeze the upper limit plate of the spline rod 8 when it moves downward.

[0035] In the process of the electric slider on the electric slide rail 3 driving the support ring 4 to move downward, the support ring 4 drives the first electric push rod 16 to move downward synchronously. In the initial state, the baffle 161 does not contact the limit plate of the spline rod 8. When the lower side of the connecting shell 6 contacts the joint, the four arc-shaped spring pieces 12 correct the position of the slide plate 7. As the electric slider of the electric slide rail 3 continues to drive the support ring 4 to move downward, the support ring 4 moves downward to squeeze the telescopic ends of the two first telescopic rods 5. The telescopic ends of the first telescopic rods 5 move downward. At the same time, the second elastic member 13 is compressed, and the hydraulic oil in the first telescopic rod 5 flows along the oil guide pipe thereon into the adjacent second telescopic rod 14. The telescopic end of the second telescopic rod 14 contracts, and the telescopic ends of the two second telescopic rods 14 drive the squeeze ring 1 5 is squeezed downward, the lower part of the squeezing ring 15 is deformed, and the slide plate 7 is squeezed by the squeezing ring 15 and the connecting shell 6, thereby limiting the slide plate 7. Then the controller 2 starts the first electric push rod 16, and the telescopic end of the first electric push rod 16 drives the baffle 161 to move downward. The baffle 161 squeezes the limiting plate at the upper end of the spline rod 8 downward, and the spline rod 8 drives the electric turret 10 to move downward. The first elastic member 9 is compressed, and the controller 2 controls the extension length of the telescopic end of the first electric push rod 16, thereby adjusting the positions of the electric turret 10 and the two laser rangefinders 11 to detect different positions of the joint. The squeezing ring 15 cooperates with the connecting shell 6 to limit the slide plate 7, thereby improving the stability of the slide plate 7 and the spline rod 8, thereby ensuring the accuracy of the joint detection.

[0036] When the joint detection is completed, the controller 2 controls the telescopic end of the first electric push rod 16 to drive the baffle 161 to move upward and reset. At this time, under the elastic force of the first elastic member 9, the spline rod 8 drives the electric turntable 10 and the two laser rangefinders 11 to move upward and reset. Then the controller 2 starts the electric slider of the electric slide rail 3, and the electric slider drives the support ring 4 to move upward. Under the elastic force of the second elastic member 13, the telescopic end of the first telescopic rod 5 moves upward and resets. The connecting shell 6 and the upper side of the joint are still in a squeeze contact state. The telescopic end of the first telescopic rod 5 moves upward. The hydraulic oil flows back to the two first telescopic rods 5, and the telescopic ends of the two second telescopic rods 14 move upward. The telescopic ends of the two second telescopic rods 14 drive the extrusion ring 15 to move upward. The extrusion ring 15 releases the extrusion on the slide 7, and the support ring 4 continues to move upward. The support ring 4 drives the connecting shell 6 to move upward through the two extrusion rings 15, and the connecting shell 6 loses contact with the upper side of the joint until the electric slider of the electric slide rail 3 drives the support ring 4 to reset, the controller 2 turns off the electric slider of the electric slide rail 3, and then the staff removes the tested joint from the test bench 1.

[0037] Example 3: Based on Example 2, Figure 6As shown, it also includes a joint fixing mechanism, which is arranged on the lower side of the detection platform 1. The joint fixing mechanism is used to pre-position the joint. The joint fixing mechanism includes six sliding rods 17 distributed at equal intervals in the circumferential direction. The six sliding rods 17 are used to correct the position of the joint and fix the joint. The detection platform 1 is provided with six guide grooves distributed at equal intervals in the circumferential direction. The six sliding rods 17 are respectively slidably connected to the adjacent guide grooves of the detection platform 1. The guide grooves of the detection platform 1 are used to guide the adjacent sliding rods 17. The lower side of the detection platform 1 is rotatably connected to a rotating ring 18, and the rotating ring 18 is provided with There are six chute distributions at equal intervals in the circumferential direction, and six sliding rods 17 are respectively slidably connected to the inclined chute adjacent to the rotating ring 18. The rotating ring 18 is fixed with a gear ring. A motor 19 is fixed to the lower side of the detection platform 1. The motor 19 is electrically connected to the controller 2. The output shaft of the motor 19 is fixed with a gear meshing with the gear ring. The motor 19 is a reduction motor. The output shaft of the motor 19 drives the gear ring to rotate through the gear thereon, so that the rotating ring 18 drives the six sliding rods 17 to move closer or away from each other. An impurity cleaning component is provided at the bottom of the detection platform 1, and the impurity cleaning group is used to clean impurities adhering to the inner wall of the joint.

[0038] like Figure 6-Figure 8 As shown, the impurity cleaning assembly includes a support plate 191, the support plate 191 is fixed to the bottom of the detection platform 1, the front part of the upper side of the support plate 191 is fixed with a second electric push rod 20, the second electric push rod 20 is electrically connected to the controller 2, the telescopic end of the second electric push rod 20 is fixed with a fixed sleeve 21, the telescopic end of the second electric push rod 20 drives the fixed sleeve 21 to move synchronously, the fixed sleeve 21 passes through the rotating ring 18 and the detection platform 1, the fixed sleeve 21 is slidably connected with a sliding tube 22, the fixed sleeve 21 is hinged with six hinged rods 23 with equal spacing in the circumferential direction, the sliding tube 22 is hinged with a connecting plate between the adjacent hinged rods 23, and the sliding tube 22 is hinged with the adjacent hinged rods 23. When relative sliding occurs with the fixed sleeve 21, the hinged rod 23 will swing synchronously. The hinged rod 23 is fixed with a nozzle 24, and the nozzle 24 is connected to the sliding tube 22 through an air guide tube. The sliding tube 22 is connected to the air outlet of the air injection equipment. The air injection equipment is an existing device. The air outlet of the air injection equipment can output high-pressure air. The lower end of the sliding tube 22 is fixed with a counterweight block 25. The counterweight block 25 is used to pull the sliding tube 22 so that the sliding tube 22 and the fixed sleeve 21 move relative to each other. The counterweight block 25 is limited by the support plate 191, and the central axis of the rotating ring 18 coincides with the central axis of the sliding tube 22, which is used to clean impurities attached to the inner wall of the joint.

[0039] After the staff places the joint on the inspection table 1 (the joint is located between the six sliding rods 17), the controller 2 then starts the motor 19. The output shaft of the motor 19 drives the gear ring to rotate clockwise through the gear thereon, and the gear ring drives the rotating ring 18 to rotate. Under the squeezing action of the inclined slide groove of the rotating ring 18, the sliding rod 17 slides along the adjacent guide grooves of the inspection table 1, and the six sliding rods 17 move closer to each other. After the six sliding rods 17 contact and squeeze the outside of the joint, the six sliding rods 17 adjust and fix the position of the joint, reducing the labor intensity of the staff. At the same time, the six sliding rods 17 fix the joint, thereby improving the accuracy of joint detection.

[0040] After the joint is fixed, the controller 2 starts the second electric push rod 20. The telescopic end of the second electric push rod 20 drives the fixed sleeve 21 to move upward. The staff starts the air injection equipment simultaneously. The air outlet of the air injection equipment sprays high-pressure air. The high-pressure air flows along the air guide pipe and is sprayed out from the six nozzles 24. During the upward movement of the fixed sleeve 21, since the lower end of the sliding tube 22 is fixedly connected to the counterweight block 25, the sliding tube 22 is stationary when the fixed sleeve 21 moves upward, and the fixed sleeve 21 and the sliding tube 22 will move relative to each other. At this time, under the action of the connecting plate between the hinge rod 23 and the sliding tube 22, The six hinged rods 23 swing outward synchronously along the fixed sleeve 21, and the upper ends of the six hinged rods 23 are squeezed on the inner wall of the joint and stop swinging. The high-pressure air sprayed by the six nozzles 24 cleans the impurities adhering to the inner wall of the joint, and the fixed sleeve 21 continues to move upward. Since the six hinged rods 23 are limited, the sliding tube 22 then drives the counterweight block 25 to move upward synchronously, and the counterweight block 25 loses contact with the support plate 191, thereby completing the cleaning of impurities adhering to the inner wall of the joint, avoiding the impurities adhering to the inner wall of the joint causing errors in the detection distance of the laser rangefinder 11, thereby causing misjudgment of the joint.

[0041] After the impurities on the inner wall of the joint are cleaned, the controller 2 controls the telescopic end of the second electric push rod 20 to move downward and reset, and the counterweight block 25 moves downward and contacts the support plate 191 again. As the fixed sleeve 21 moves downward, the fixed sleeve 21 and the sliding tube 22 produce relative displacement, causing the six hinged rods 23 to swing upward and reset. When the telescopic end of the second electric push rod 20 drives the fixed sleeve 21 to reset, the controller 2 turns off the second electric push rod 20, and the staff turns off the gas injection device at the same time, and then repeats the above operation to detect the inner diameter of the joint. After the joint inspection is completed, the controller 2 starts the motor 19 to rotate the output shaft of the motor 19 in the opposite direction, and the rotating ring 18 rotates in the opposite direction, so that the six sliding rods 17 move away from each other, and the six sliding rods 17 no longer contact the joint. After the six sliding rods 17 are reset, the controller 2 turns off the motor 19, and then the staff removes the joint from the inspection table 1 after the inspection is completed.

[0042] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications may be made to the present invention without departing from the principles and spirit of the invention as defined in the claims. Therefore, the detailed description of the disclosed embodiments is intended to be illustrative only and not to limit the present invention, which is to be defined by the claims.

Claims

1. A detection device for oil drill pipe joints, characterized by: The invention comprises a detection platform (1), a controller (2) is installed on one side of the detection platform (1), the detection platform (1) is fixedly connected to an electric slide rail (3), the electric slider of the electric slide rail (3) is fixedly connected to a support ring (4) through a mounting plate, the electric slider of the electric slide rail (3) is electrically connected to the controller (2), the support ring (4) is fixedly connected to a symmetrical first telescopic rod (5), the support ring (4) is fixedly connected to the telescopic end of the first telescopic rod (5), a connecting shell (6) is fixedly connected between the symmetrical first telescopic rods (5), a through hole is provided in the middle of the connecting shell (6), a slide plate (7) is slidably connected in the connecting shell (6), the slide plate (7) is spline-connected to a spline rod (8), and the spline rod (8) a through hole running through the connecting shell (6), a limit plate is installed on the upper end of the spline rod (8), a first elastic member (9) is fixedly connected between the limit plate of the spline rod (8) and the slide plate (7), the lower end of the spline rod (8) is rotatably connected to an electric rotary head (10), the electric rotary head (10) is electrically connected to the controller (2), the electric rotary head (10) is installed with a symmetrical laser rangefinder (11), the laser rangefinder (11) is electrically connected to the controller (2), the connecting shell (6) is provided with circumferentially equidistant slide grooves, the slide plate (7) is fixedly connected to circumferentially equidistant springs (12) through fixed columns, and the fixed columns of the springs (12) are located in adjacent slide grooves of the connecting shell (6); The auxiliary stabilizing mechanism is also included. The auxiliary stabilizing mechanism is arranged between the connecting shell (6) and the symmetrical first telescopic rod (5). The auxiliary stabilizing mechanism is used to improve the stability of the slide plate (7). The auxiliary stabilizing mechanism includes a symmetrical second elastic member (13). The symmetrical second elastic member (13) is respectively sleeved on the telescopic end of the adjacent first telescopic rod (5). The two ends of the second elastic member (13) are respectively fixed to the adjacent first telescopic rod (5) and the support ring (4). The connecting shell (6) is fixed with a symmetrical second telescopic rod (14). The first telescopic rod (5) is fixed with a symmetrical second telescopic rod (14). An oil guide pipe is connected between the rod (5) and the adjacent second telescopic rod (14), and hydraulic oil is filled in the first telescopic rod (5) and the adjacent oil guide pipe. An extrusion ring (15) is fixed between the telescopic ends of the symmetrical second telescopic rod (14), and the extrusion ring (15) is slidably matched with the connecting shell (6). The spline rod (8) passes through the extrusion ring (15), and the extrusion ring (15) is in contact with the slide plate (7). A driving component is provided between the support ring (4) and the electric slider of the electric slide rail (3), and the driving component is used to change the position of the spline rod (8).

2. The detection device for oil drill pipe joints according to claim 1, characterized in that: The spring pieces (12) are arranged in an arc shape, and are squeezed together with the joint to adjust the position of the slide plate (7). The elastic force of the spring pieces (12) at equal circumferential intervals is smaller than the weight of the slide plate (7).

3. The detection device for oil drill pipe joints according to claim 1, characterized in that: The diameter of the circular hole in the middle of the connecting shell (6) is smaller than the diameter of the slide plate (7), and is used to ensure that the connecting shell (6) and the slide plate (7) are in a fitted state.

4. The detection device for oil drill pipe joints according to claim 1, characterized in that: A gap is provided between the extrusion ring (15) and the connection shell (6), the width of the gap between the extrusion ring (15) and the connection shell (6) being the same as the thickness of the slide plate (7), and an elastic material ring is provided at the bottom of the extrusion ring (15).

5. The detection device for oil drill pipe joints according to claim 1, characterized in that: The elastic force of the symmetrical second elastic member (13) is greater than the elastic force of the circumferentially equidistant elastic pieces (12).

6. The detection device for oil drill pipe joints according to claim 1, characterized in that: The driving assembly includes a first electric push rod (16), the first electric push rod (16) is fixed to the mounting plate between the support ring (4) and the electric slider of the electric slide rail (3), the telescopic end of the first electric push rod (16) is fixed to a baffle (161), the baffle (161) is located above the spline rod (8), and the area of ​​the baffle (161) is larger than the area of ​​the upper end limit plate of the spline rod (8).

7. The detection device for oil drill pipe joints according to claim 1, characterized in that: The joint fixing mechanism is also included. The joint fixing mechanism is arranged on the lower side of the detection platform (1). The joint fixing mechanism is used to pre-position the joint. The joint fixing mechanism includes sliding rods (17) distributed at equal intervals in the circumferential direction. The detection platform (1) is provided with guide grooves distributed at equal intervals in the circumferential direction. The sliding rods (17) distributed at equal intervals in the circumferential direction are respectively slidably connected to adjacent guide grooves of the detection platform (1). The lower side of the detection platform (1) is rotatably connected to a rotating ring (18). The rotating ring (18) is provided with Inclined chutes are distributed at equal intervals in the circumferential direction, and the sliding rods (17) distributed at equal intervals in the circumferential direction are respectively slidably connected to the adjacent chutes of the rotating ring (18), the rotating ring (18) is fixedly connected to a gear ring, a motor (19) is fixedly connected to the lower side of the detection platform (1), the motor (19) is electrically connected to the controller (2), the output shaft of the motor (19) is fixedly connected to a gear meshing with the gear ring, and an impurity cleaning assembly is provided at the bottom of the detection platform (1), and the impurity cleaning assembly is used to clean impurities adhering to the inner wall of the joint.

8. The detection device for oil drill pipe joints according to claim 7, characterized in that: The impurity cleaning assembly includes a support plate (191), the support plate (191) is fixed to the bottom of the detection platform (1), a second electric push rod (20) is fixed to one side of the support plate (191), the second electric push rod (20) is electrically connected to the controller (2), a fixed sleeve (21) is fixed to the telescopic end of the second electric push rod (20), the fixed sleeve (21) passes through the rotating ring (18) and the detection platform (1), and a sliding tube ( 22), the fixed sleeve (21) is hinged with hinged rods (23) with circumferential equal spacing, a connecting plate is hinged between the sliding tube (22) and the adjacent hinged rods (23), the hinged rods (23) are fixed with a nozzle (24), the nozzle (24) is connected to the sliding tube (22) through an air guide tube, the sliding tube (22) is connected to the air outlet of the gas injection equipment, the lower end of the sliding tube (22) is fixed with a counterweight (25), and the counterweight (25) is limitedly matched with the support plate (191).

9. The detection device for oil drill pipe joints according to claim 8, characterized in that: The central axis of the rotating ring (18) coincides with the central axis of the sliding tube (22), and is used to clean impurities attached to the inner wall of the joint.

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