Detection equipment for petroleum drill rod joint

Abstract

The invention relates to the technical field of detection equipment, and provides detection equipment for a petroleum drill rod joint. Comprising a detection table, the detection table is fixedly connected with an electric sliding rail, an electric sliding block of the electric sliding rail is fixedly connected with a supporting ring through a mounting plate, the supporting ring is fixedly connected with symmetrical first telescopic rods, a connecting shell is jointly and fixedly connected between the symmetrical first telescopic rods, and a sliding plate is slidably connected into the connecting shell; the sliding plate is in spline connection with a spline rod, the lower end of the spline rod is rotationally connected with an electric rotating head, the electric rotating head is provided with symmetrical laser range finders, and the sliding plate is fixedly connected with elastic pieces at equal intervals in the circumferential direction through a fixing column. The position of the sliding plate is adjusted through the arc-shaped elastic piece, then the positions of the electric rotating head and the laser range finders are adjusted, the distances between the two laser range finders and the inner wall of the drill rod connector are equal, the two laser range finders are compared with measured numerical values, and the numerical value abnormal position of the drill rod connector 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 drilling pressure, and transporting drilling fluid. It is an indispensable link between the drill pipe and the drilling tool.

[0003] The detection of oil drill pipe joints is an important part of ensuring the safety and efficiency of drilling operations. By detecting the diameters of different positions in the oil drill pipe joints, the smoothness of the flow of the internal fluid is ensured. However, the existing detection tools for oil drill pipe joints mostly use mechanical measuring tools such as vernier calipers and internal diameter gauges or electronic internal diameter measuring instruments. The detection tools introduced above are basically operated by workers. However, workers will become fatigued after long-term measurement, which seriously affects the accuracy and efficiency of detection. At the same time, the above devices need to ensure the placement angle and placement position of the detection device during measurement, otherwise the detection value 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 plate is slidably connected in the connecting shell, and 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 with an electric turntable, and the electric turntable is electrically connected to the controller. The electric turntable 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 fixedly connected with circumferentially evenly spaced springs through fixed columns, and the fixed columns of the springs are located in the slide grooves adjacent to 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 plate, and the elastic force of the spring pieces with equal circumferential spacing is smaller than the gravity of the slide plate.

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

[0008] Furthermore, an auxiliary stabilizing mechanism is included, which is arranged between the connecting shell and the symmetrical first telescopic rod, and is used to improve the stability of the slide plate. The auxiliary stabilizing 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, and 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, and 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, and the extrusion ring is slidably matched with the connecting shell, and the spline rod passes through the extrusion ring, and the extrusion ring is in contact with the slide plate, and a drive assembly is arranged 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 member is greater than the elastic force of the elastic sheets with equal circumferential spacing.

[0011] Furthermore, the driving assembly includes a first electric push rod, which is fixed to a mounting plate between the support ring and the electric slider of the electric slide rail, and a baffle is fixed to the telescopic end of the first electric push rod, and the baffle 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 is used to pre-position the joint, and the joint fixing mechanism includes sliding rods distributed at equal intervals in the circumferential direction, and the detection platform is provided with guide grooves distributed at equal intervals in the circumferential direction, and the sliding rods distributed at equal intervals in the circumferential direction are respectively slidably connected to 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 sliding grooves distributed at equal intervals in the circumferential direction, and the sliding rods distributed at equal intervals in the circumferential direction are respectively slidably connected to adjacent sliding grooves of the rotating ring, and the rotating ring is fixedly connected with a gear ring, and a motor is fixedly connected to the lower side of the detection platform, and the motor is electrically connected to the controller, and the output shaft of the motor is fixedly connected with a gear meshing with the gear ring, and an impurity cleaning component is provided at the bottom of the detection platform, 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, the support plate 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 inside the fixed sleeve, the fixed sleeve is hinged with hinged rods with circumferentially equal spacing, a connecting plate is hinged between the sliding tube and the adjacent hinged rod, a nozzle is fixedly connected 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, a counterweight block is fixedly connected to the lower end of the sliding tube, 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 connection shell to limit the slide plate, thereby improving the stability of the slide plate and the spline rod, avoiding positional deviation 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 are used to fix the joint, thereby improving the accuracy of joint detection. The impurities adhered to the inner wall of the joint are cleaned by high-pressure air sprayed from six nozzles, 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; Figure 2 It is a side view of the supporting ring and connecting shell and other parts of the present invention; Figure 3 It is a three-dimensional structural schematic diagram of the connecting shell and the spline rod and other parts of the present invention; Figure 4 It is a cross-sectional view of parts such as a support ring and a connecting shell of the present invention; Figure 5 It is a cross-sectional view of the connecting shell and the extrusion ring of the present invention; Figure 6 is a cross-sectional view of the detection platform of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the fixed sleeve and hinged rod and other parts of the present invention; Figure 8 It is a cross-sectional view of parts such as a fixed sleeve and a sliding tube of the present invention.

[0019] The meanings of the reference numerals in the figure are: 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-spline rod, 25-counterweight. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0021] Research and investigation found that when inspecting oil drill pipe joints, workers use mechanical measuring tools such as vernier calipers and internal diameter gauges or electronic internal diameter measuring instruments to inspect the joints. Workers will become tired after long-term inspections, and workers are required to ensure the placement angle and placement of the inspection device, which requires high measurement skills of workers. In addition, the above inspection devices will have large errors during inspection. The following implementation method is adopted to improve the inspection accuracy of drill pipe joints.

[0022] Embodiment 1: A detection device for oil drill pipe joints, such as Figure 1-Figure 5 As shown, it includes a test platform 1, a controller 2 is installed on the right side of the test platform 1 through a rotating frame, the controller 2 can swing on the rotating frame at will, the test platform 1 is fixedly connected to an electric slide rail 3, the electric slide rail 3 is placed vertically, 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 located on the front side of the electric slide rail 3, the support ring 4 is fixedly connected to 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 attached drawings, the support ring 4 and the first telescopic rod 5 are fixedly connected to the first telescopic rod 5. The telescopic end of the retractable rod 5 is fixed, and a connecting shell 6 is fixedly connected between the lower ends of the two first telescopic rods 5. A through hole is set 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. 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 fixedly connected 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 detection 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 plate 7 is fixedly connected with four circumferentially evenly spaced springs 12 through a fixing column, the four springs 12 are used to correct the position of the slide plate 7, and the fixing column of the springs 12 is located at the connecting shell 6, the width of the slide groove 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 plate 7. When correcting the position of the slide plate 7, the fixing column of the spring piece 12 will move in the slide groove 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 plate 7. When the four spring pieces 12 are deformed, the slide plate 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 plate 7, which is used to ensure that the connecting shell 6 and the slide plate 7 are in a fitted state.

[0023] 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 pieces 12 contact the upper edge of the joint. After the four arc-shaped spring pieces 12 are squeezed, the four arc-shaped spring pieces 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 forces exerted on the four arc-shaped spring pieces 12 are the same, and then the central axis of the slide plate 7 coincides with the central 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.

[0024] The electric turret 10 rotates circumferentially along the spline rod 8, and 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 values ​​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.

[0025] 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 rotary head 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, and the two first telescopic rods 5 drive the connecting shell 6 and all parts thereon to move upward and reset, and 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.

[0026] Embodiment 2: Based on embodiment 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 slide plate 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. The two ends of the second elastic members 13 are respectively fixed to the adjacent first telescopic rods 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 structures are 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 The retracted end contracts, and an extrusion ring 15 is fixedly connected between the telescopic ends of the two second telescopic rods 14. The extrusion ring 15 is located on the upper side of the slide plate 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 slide plate 7. When the extrusion ring 15 squeezes the slide plate 7, the slide plate 7 is stabilized between the connecting shell 6 and the extrusion ring 15. A driving assembly is arranged 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 arranged 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 slide plate 7, and an elastic material ring is arranged at the lower part of the extrusion ring 15. When the extrusion ring 15 does not squeeze the slide plate 7, the slide plate 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 sheets 12.

[0027] like Figure 3 As shown, the drive assembly includes a first electric push rod 16, which is fixedly connected to a mounting plate between the support ring 4 and the electric slider of the electric slide rail 3. A baffle 161 is fixedly connected to the telescopic end of the first electric push rod 16, and the baffle 161 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, thereby ensuring that the baffle 161 can squeeze the upper limit plate of the spline rod 8 when the baffle 161 moves downward.

[0028] In the process that the electric slider on the electric slide rail 3 drives 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 into the adjacent second telescopic rod 14 along the oil guide pipe thereon. 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, the slide plate 7 is squeezed by the squeezing ring 15 and the connecting shell 6, and then the slide plate 7 is limited. Then the controller 2 starts the first electric push rod 16, the telescopic end of the first electric push rod 16 drives the baffle 161 to move downward, the baffle 161 presses the limit plate at the upper end of the spline rod 8 downward, the spline rod 8 drives the electric rotary head 10 to move downward, the first elastic member 9 is compressed, the controller 2 controls the extension length of the telescopic end of the first electric push rod 16, and then adjusts the positions of the electric rotary head 10 and the two laser rangefinders 11 to detect different positions of the joint, and uses the squeezing ring 15 and the connecting shell 6 to limit the slide plate 7, improve the stability of the slide plate 7 and the spline rod 8, and then ensure the accuracy of joint detection.

[0029] 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 rotary head 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 upper side of the connecting shell 6 and the joint is still in a squeeze contact state. The telescopic end of the first telescopic rod 5 moves upward. The hydraulic oil flows back into 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 of the slide plate 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.

[0030] Embodiment 3: Based on embodiment 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 with a rotating ring 18, and the rotating ring 18 is provided with There are six slide grooves distributed at equal intervals in the circumferential direction, and six sliding rods 17 are respectively slidably connected in the inclined slide grooves adjacent to the rotating ring 18. The rotating ring 18 is fixedly connected with 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 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 farther. An impurity cleaning component is provided at the bottom of the detection platform 1, and the impurity cleaning group is used to clean impurities adhered to the inner wall of the joint.

[0031] like Figure 6-Figure 8 As shown, the impurity cleaning assembly includes a support plate 191, the support plate 191 is fixedly connected to the bottom of the detection platform 1, the second electric push rod 20 is fixedly connected to the front of the upper side of the support plate 191, the second electric push rod 20 is electrically connected to the controller 2, the telescopic end of the second electric push rod 20 is fixedly connected to the 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 articulated rods 23 with equal circumferential spacing, the sliding tube 22 is hinged with a connecting plate between the adjacent articulated rods 23, and the sliding tube 22 When relative sliding occurs with the fixed sleeve 21, the hinged rod 23 will swing synchronously. The hinged rod 23 is fixedly connected with a nozzle 24, and the nozzle 24 is connected with the sliding tube 22 through an air guide pipe. The sliding tube 22 is connected with the air outlet of the gas injection equipment. The gas injection equipment is an existing device. The air outlet of the gas injection equipment can output high-pressure air. A counterweight block 25 is fixedly connected to the lower end of the sliding tube 22. 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 limitedly matched with 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.

[0032] After the staff places the joint on the testing table 1 (the joint is located between the six sliding rods 17), the controller 2 then starts the motor 19, and 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 testing 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.

[0033] After the joint is fixed, the controller 2 starts the second electric push rod 20, and the telescopic end of the second electric push rod 20 drives the fixed sleeve 21 to move upward. The staff starts the gas injection equipment simultaneously, and the air outlet of the gas 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 with a 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 articulated rods 23 swing outward synchronously along the fixed sleeve 21, and the upper ends of the six articulated rods 23 are pressed against the inner wall of the joint and stop swinging. The high-pressure air sprayed by the six nozzles 24 cleans the impurities adhered to the inner wall of the joint, and the fixed sleeve 21 continues to move upward. Since the six articulated 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 the impurities adhered to the inner wall of the joint, avoiding the impurities adhered to the inner wall of the joint causing errors in the detection distance of the laser rangefinder 11, thereby causing misjudgment of the joint.

[0034] 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, so that the six hinged rods 23 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 make the output shaft of the motor 19 rotate 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 after the inspection from the inspection table 1.

[0035] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A detection device for oil drill pipe joints, characterized in that: 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) via 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 sliding plate (7) is slidably connected in the connecting shell (6), the sliding plate (7) is spline-connected to a spline rod (8), and the spline rod The invention relates to a through hole (8) penetrating the connecting shell (6), a limit plate is installed at 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 evenly spaced sliding grooves, the slide plate (7) is fixedly connected with circumferentially evenly spaced spring pieces (12) via fixed columns, and the fixed columns of the spring pieces (12) are located in the adjacent sliding grooves of the connecting shell (6).

2. The detection device for oil drill pipe joints according to claim 1 is characterized in that: The spring pieces (12) are arranged in an arc shape, and are pressed 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. A 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 connection shell (6) is smaller than the diameter of the slide plate (7), so as to ensure that the connection 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 is characterized in that: 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 members (13) are respectively sleeved on the telescopic ends of the adjacent first telescopic rods (5). The two ends of the second elastic member (13) are respectively fixedly connected to the adjacent first telescopic rods (5) and the support ring (4). The connecting shell (6) is fixedly connected to the symmetrical second telescopic rods (14). The first telescopic rods (14) are 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 fixedly connected between the telescopic ends of the symmetrical second telescopic rods (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 arranged between the support ring (4) and the electric slide block of the electric slide rail (3), and the driving component is used to change the position of the spline rod (8).

5. The detection device for oil drill pipe joints according to claim 4 is 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).

6. The detection device for oil drill pipe joints according to claim 4 is characterized in that: The elastic force of the symmetrical second elastic member (13) is greater than the elastic force of the circumferentially equidistant elastic sheets (12).

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

8. The detection device for oil drill pipe joints according to claim 1 is characterized in that: The detection platform (1) further comprises a joint fixing mechanism, the joint fixing mechanism being arranged at the lower side of the detection platform (1), the joint fixing mechanism being used for pre-positioning the joint, the joint fixing mechanism comprising sliding rods (17) distributed at equal intervals in the circumferential direction, the detection platform (1) being provided with guide grooves distributed at equal intervals in the circumferential direction, the sliding rods (17) distributed at equal intervals in the circumferential direction being respectively slidably connected in adjacent guide grooves of the detection platform (1), the lower side of the detection platform (1) being rotatably connected with a rotating ring (18), the rotating ring (18) being provided with Inclined slide grooves are distributed at equal intervals in the circumferential direction, the sliding rods (17) are distributed at equal intervals in the circumferential direction and are respectively slidably connected in the slide grooves adjacent to 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 arranged at the bottom of the detection platform (1), the impurity cleaning assembly is used to clean impurities adhering to the inner wall of the joint.

9. The detection device for oil drill pipe joints according to claim 8, characterized in that: The impurity cleaning component comprises a support plate (191), the support plate (191) being fixedly connected to the bottom of the detection platform (1), a second electric push rod (20) being fixedly connected to one side of the support plate (191), the second electric push rod (20) being electrically connected to the controller (2), a fixed sleeve (21) being fixedly connected to the telescopic end of the second electric push rod (20), the fixed sleeve (21) passing through the rotating ring (18) and the detection platform (1), a sliding tube (21) being slidably connected inside the fixed sleeve (21) 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 rod (23), the hinged rod (23) is fixedly connected with a nozzle (24), the nozzle (24) is connected with the sliding tube (22) through an air guide tube, the sliding tube (22) is connected with the air outlet of the air injection device, and the lower end of the sliding tube (22) is fixedly connected with a counterweight block (25), and the counterweight block (25) is limitedly matched with the support plate (191).

10. The detection device for oil drill pipe joints according to claim 9, 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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