Coaxiality detection device for screw drill

Abstract

The invention discloses a coaxiality detection device for a screw drill, and relates to the technical field of coaxiality detection of screw drills, the coaxiality detection device comprises a detection machine body, one end of the detection machine body is symmetrically and rotatably connected with three-jaw centering devices for centering a drill assembly, and one ends of the two three-jaw centering devices are fixedly connected through a connecting cylinder. The drilling tool assembly can be driven to stably rotate by 90 degrees clockwise through the arrangement of the driving mechanism, the accuracy of the drilling tool assembly driven by the driving mechanism to rotate by 90 degrees can be further improved through the arrangement of the limiting structure, the effectiveness and accuracy of data collection are further improved, follow-up calculation is more accurate, and in addition, the accuracy of the drilling tool assembly is improved. A ratchet wheel and a pawl are arranged, so that the rotation condition is avoided, the adaptability and the stability of the device during detection are further improved, and data acquisition work can be performed on four point positions of the drilling tool assembly component according to requirements.

Description

Technical Field

[0001] The invention relates to the technical field of screw drill coaxiality detection, and in particular to a coaxiality detection device for a screw drill. Background Art

[0002] Screw drill bits are a type of downhole power tool widely used in oil drilling projects. They are mainly used to drive the drill bit to rotate and crush rocks. Their core feature is that they convert the hydraulic energy of the drilling fluid (mud) into mechanical energy, without relying on a ground turntable to drive the drill string. They are particularly suitable for drilling complex wells such as directional wells and horizontal wells. The main assemblies of screw drill bits usually include a motor assembly, a universal shaft assembly, and a drive shaft assembly.

[0003] The connection of the various assembly sections of the screw drill is a concentrated embodiment of the precision mechanical assembly process. It requires high-precision processing + dynamic centering calibration + graded preload control to ensure the connection rigidity, sealing and coaxiality. In the process of coaxiality detection and calibration, the precision process of compensating for the coaxiality deviation by slightly adjusting the flange surface spacing and angle is used to correct the axis offset and ensure the connection rigidity and sealing. The current detection device can detect the coaxiality deviation of the screw drill, but it cannot determine which part of the screw drill connection end to perform the correction work, and cannot be used as a reference during the subsequent correction operation. Summary of the invention

[0004] The object of the present invention is to provide a coaxiality detection device for a screw drill to solve the problem in the above-mentioned background technology that only the coaxiality deviation can be detected during the detection process, but it cannot be used as a reference in the subsequent correction process.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A coaxiality detection device for a screw drill comprises: a detection body, one end of which is symmetrically rotatably connected to a three-claw centering device for centering a drill assembly, and one end of two three-claw centering devices is fixedly connected via a connecting tube, the other end of the detection body is fixedly installed with a support frame for supporting the end of the drill assembly, and the top of the bottom plate is symmetrically fixedly installed with an auxiliary rotating frame that rotates with the connecting tube; The driving mechanism is fixedly installed inside one end of the detection body and is used to drive the connecting tube to rotate 90° clockwise. The driving mechanism includes a hydraulic cylinder and a limiting frame fixedly installed on the upper surface of the bottom plate, and the hydraulic cylinder and the limiting frame are arranged in a straight line. A transmission rack is slidably connected inside the limiting frame, and one end of the transmission rack is connected to the output end of the hydraulic cylinder through an elastic coupling. A transmission gear ring is meshed and connected above the transmission rack, and the transmission gear ring is rotatably connected to the outer ring of the connecting tube. The detection mechanism is fixedly installed on one side of the detection body and is used to detect the deviation of the drilling tool assembly component.

[0006] With the above technical solution, the driving mechanism drives the drill assembly to rotate 90°, and after the driving mechanism rotates clockwise for one circle, the radial measurement values ​​of the four azimuth points (0°, 90°, 180° and 270°) of a cross section are measured. The detection form of the detection mechanism is divided into multiple different steps; Step 1: The detection mechanism first moves linearly along the top of the drill tool assembly, starting from the detection position and running to the tail end of the drill tool assembly, for a one-time continuous detection. By reading the R value of the detection mechanism, it is determined whether the detection end of the drill tool assembly is bent in the middle (i.e., the drill tool assembly itself is bent) by whether it is arranged in a linear manner. If a nonlinear arrangement is found, it is determined that there is a problem with the drill tool assembly itself and a correction process is required. If a linear arrangement is found, the subsequent steps of detection are carried out; The second step is to collect data from multiple cross sections at the detection end of the drill assembly. Then, the data from multiple cross sections are calculated and compared, and after eliminating abnormal data, the average value is taken to reduce random errors.

[0007] A further improvement of the technical solution of the present invention is that the driving mechanism also includes two mounting rings fixedly installed inside the detection body, the inner ring of the mounting ring is rotatably connected to a ratchet, the outer ring of the mounting ring is rotatably connected to a plurality of pawls through a torsion spring, and the pawls and the ratchet are squeezed together, one side of the ratchet is equidistantly slidably connected to a plurality of limiting blocks, and the plurality of limiting blocks are squeezed together with the side wall of the transmission gear ring, one end of the limiting block extends to the interior of the ratchet and is sleeved with an auxiliary spring, the outer ring of the ratchet is threadedly connected to a plurality of closed seats corresponding to the position of the limiting block, one end of the limiting frame is fixedly installed with a limiting structure for limiting the rotation of the transmission gear ring, and the outer ring of the ratchet is equidistantly provided with slots that are snap-fitted with the limiting blocks.

[0008] By adopting the above technical solution, after the detection mechanism completes the data collection of one data point of the cross section, the driving mechanism drives the drill assembly to rotate 90° clockwise, so as to facilitate the data collection of the next data point. At this time, the hydraulic cylinder drives the transmission rack to move linearly along the limiting frame, and then drives the transmission ring gear to rotate through the transmission rack, and the transmission ring gear is limited by the clamping connection between the limiting block and the ratchet. As the transmission ring gear rotates, the ratchet will synchronously drive the connecting tube to rotate, and the connecting tube cooperates with the three-claw centering device to limit the drill assembly. As the connecting tube rotates, the drill assembly will rotate synchronously to realize the change of data points, and the transmission rack will drive the limiting structure to adjust the position of the ratchet during the movement. Limitation, after rotating 90°, the limiting structure will be inserted into the groove of the outer ring of the ratchet to prevent the ratchet from rotating excessively and causing inaccurate data. After that, the hydraulic cylinder starts to drive the transmission rack to reset. At this time, the ratchet will not rotate due to the limitation of the pawl, and the limiting block begins to shrink toward the inside of the ratchet under the squeezing of the transmission ring gear and the ratchet. As the limiting block shrinks, the transmission ring gear and the ratchet are separated, so that the transmission ring gear can be reset, which is convenient for the device and further improves the accuracy of data collection. In addition, as the transmission rack is reset, the transmission rack will drive the limiting structure to release the limit, which is convenient for the transmission rack drive device to rotate 90° and limit the device again, thereby improving the stability of the device during operation.

[0009] A further improvement of the technical solution of the present invention is that the limiting structure includes a fixed cylinder fixedly installed inside the limiting frame at one end away from the hydraulic cylinder, one end of the transmission rack is provided with a mounting groove that is installed and matched with the fixed cylinder, the interior of the fixed cylinder is slidably connected with an extrusion piston rod, and the end of the extrusion piston rod is fixedly connected to the end of the transmission rack, the end of the fixed cylinder away from the fixed cylinder is fixedly connected to the input end of the diverter plate, and two branch ducts are fixedly installed at the output end of the diverter plate, and the ends of the two branch ducts away from the diverter plate are fixedly installed with mounting tubes, the outer sides of the two mounting tubes are sleeved with a fixed frame, and the fixed frame is fixedly connected to the inner wall of the detection body, the end of the mounting tube away from the branch duct is slidably connected with a piston limiting column, the end of the piston limiting column is fixedly installed with a limiting clamping ball, and the piston limiting column cooperates with the limiting clamping ball to be squeezed and matched with the outer ring of the ratchet.

[0010] When the hydraulic cylinder drives the transmission rack to move, the transmission rack squeezes the piston rod to make the hydraulic oil in the fixed cylinder flow along the diverter plate and the diverter pipe to the mounting tube respectively. As the hydraulic oil in the mounting tube accumulates, the piston limiting column and the limiting clamping ball will be pushed to the outside of the mounting tube. As the limiting clamping ball moves, the ratchet rotates synchronously. As the ratchet rotates, the limiting clamping ball will be stuck in the groove opened in the side wall of the ratchet, forming a limit on the position of the ratchet, avoiding excessive movement of the ratchet, increasing the accuracy of the device during data collection, and making it more convenient to use. As the transmission rack is reset, the hydraulic oil in the mounting tube flows back to the fixed cylinder, the limiting clamping ball will be reset, thereby releasing the limit of the ratchet by the limiting clamping ball, making it convenient for the ratchet to rotate again later. In addition, after the limiting ball restricts the ratchet, the hydraulic cylinder pushes the transmission rack to move again, and the transmission ring gear will continue to rotate, while the ratchet will not rotate due to the restriction of the limiting ball. At this time, the transmission ring gear will squeeze the limiting block into the inside of the ratchet, thereby facilitating the rotation of the transmission ring gear, forming a mechanism for over-pushing protection, avoiding excessive rotation of the ratchet, and further improving the convenience and stability of the device during operation.

[0011] A further improvement of the technical solution of the present invention is that a flow limiting plate is fixedly installed inside the installation tube, the flow limiting plate is provided with flow limiting holes in an annular shape and equidistant therefrom, and the center of the flow limiting plate is provided with flow holes in an annular shape and equidistant therefrom.

[0012] When the hydraulic oil is in the oil pipe, the hydraulic oil will flow through the limiting plate and the limiting hole will be set, so that the hydraulic oil can flow through the limiting plate at different speeds. When the transmission rack is reset, the hydraulic oil flows back to the inside of the fixed tube more slowly, so that there is a delay when the limiting ball is reset, so that when the transmission gear ring is reset, the ratchet can be restricted. The limiting ball cooperates with the pawl to lock the ratchet clockwise and counterclockwise, avoiding the rotation of the ratchet, further improving the stability of the device during operation. In order to improve the fluidity of the hydraulic oil, a flow hole is set on the limiting plate, which can appropriately increase the passability of the hydraulic oil, avoid the device from responding too long due to the setting of the limiting hole, and improve the convenience of use of the device.

[0013] A further improvement of the technical solution of the present invention is that the detection mechanism includes a linear motor fixedly installed on one side of the detection body, the output end of the linear motor is fixedly installed with a connecting frame, the bottom end of the connecting frame is fixedly installed with a main body tube, the top end of the main body tube is fixedly installed with a shunt tube, the bottom end of the main body tube is slidably connected with an extrusion piston column, the bottom end of the extrusion piston column is fixedly installed with a fixing rod, the bottom end of the fixing rod is fixedly installed with an extrusion seat, the bottom end of the extrusion piston column is rotatably connected with a rotating ball, and the rotating ball and the extrusion seat are extrusion-fitted, a cleaning ring is fixedly installed inside the bottom end of the extrusion piston column, and the cleaning ring and the rotating ball are extrusion-fitted, a fixed electrode is fixedly installed at the bottom end of the shunt tube, a movable electrode is installed at the top of the shunt tube, one end of the fixed electrode and the movable electrode are both electrically connected to the input end of the multimeter through the side wall of the shunt tube, and the multimeter is fixedly installed on one side of the main body tube, a sealing structure is installed at the connecting end of the main body tube and the shunt tube, and a cleaning structure is fixedly installed at the bottom of the main body tube.

[0014] When the drilling tool assembly is tested by adopting the above technical solution, the detection mechanism first performs linear movement detection along the drilling tool assembly to observe whether the data of the multimeter is arranged linearly, so as to judge whether the coaxiality problem of the drilling tool assembly is caused by its own bending or installation deviation; After detecting the coaxiality problem caused by installation deviation, the linear motor drives the detection end of the detection mechanism to move to a measuring point. At this time, due to the offset of the drill assembly, the extrusion piston column is tightly fitted to the surface of the drill assembly and will move up and down with the offset of the drill assembly. As the extrusion piston column moves up and down, the extrusion piston column will push the test liquid inside the main tube into the diverter tube. As the test liquid flows into the diverter tube, the position of the movable electrode will move up and down. After the liquid inside the diverter tube is stable, the connection between the main tube and the diverter tube is achieved through the sealing structure. After that, a circuit is formed by the fixed electrode, the movable electrode and the test liquid. The measured value is read by the multimeter and substituted into Formula 1 to calculate the measured value. After that, the drive mechanism drives the device to rotate 90° to collect the measurement data again. After completing the data collection of a circle, the detection mechanism moves to the next measurement point to collect the next set of data.

[0015] A further improvement of the technical solution of the present invention is that a floating plate is fixedly installed on the top of the movable electrode, and the floating plate is made of foam material.

[0016] By adopting the above technical solution, the setting of the floating plate of the movable electrode can make the movable electrode float stably on the top of the test liquid, which is convenient for adjusting the distance between the fixed electrode and the movable electrode by changing the liquid level inside the diversion tube, and convenient for obtaining the radial measurement value of the measuring point.

[0017] A further improvement of the technical solution of the present invention is that the sealing structure includes a closing plate slidably connected to the inside of the top of the main body tube, a mounting frame is fixedly installed on one side of the top of the main body tube, an electric push rod is fixedly installed on one end of the mounting frame, and the output end of the electric push rod is fixedly installed with a fixed bracket through the side wall of the mounting frame, and a strong magnet is fixedly installed on the fixed bracket.

[0018] By adopting the above technical solution, after the liquid inside the diverter tube is stabilized, the electric push rod pushes the fixed bracket and the strong magnet to move, and then pushes the closing plate inside the main tube to move through the magnetic force, so as to close the connecting end of the main tube and the diverter tube, so that the test liquid inside the main tube and the diverter tube can be separated, thereby increasing the data accuracy of the radial measurement value of the measuring point, and the closing plate and the strong magnet form a stable magnetic matching structure.

[0019] A further improvement of the technical solution of the present invention is that the cleaning structure includes a fixed sleeve fixedly installed at the bottom end of the main body tube, the bottom end of the fixed sleeve is slidably connected to a mounting cover, the bottom end of the fixed sleeve is sleeved with a reset spring, and the reset spring is arranged inside the mounting cover, the bottom end of the mounting cover is symmetrically rotatably connected to a cleaning roller, one end of the two cleaning rollers is respectively fixedly connected to one end of two synchronous belt structures, the inside of the mounting cover is rotatably connected to a gear set, the other ends of the two synchronous belt structures are respectively fixedly connected to the two gear sets, a driving motor is fixedly installed inside the mounting cover, and the output end of the driving motor is fixedly connected to one of the gear sets, and the bottom end of the mounting cover is symmetrically rotatably connected to a scraper.

[0020] By adopting the above technical solution, when the detection mechanism is moving, the driving motor drives the gear set to rotate, and the gear set and the synchronous belt structure are in transmission cooperation. As the gear set rotates, the cleaning roller will rotate synchronously in the opposite direction, so that the cleaning roller will clean the debris on the path of the detection mechanism to the outside of the mounting cover, so as to prevent the debris from entering the mounting cover and affecting the rotating ball, thereby avoiding inaccurate data. In addition, when the drill tool assembly rotates, the scraper will also clean the debris on the path. In addition, in order to increase the fit between the cleaning structure and the surface of the drill tool assembly, a fixing sleeve and a reset spring are provided at the bottom end of the main tube. The reset spring can press the mounting cover downward so that the mounting cover can fit tightly to the surface of the drill tool assembly, further improving the cleanliness of the device during use, and improving the accuracy of data acquisition.

[0021] A further improvement of the technical solution of the present invention is that the cleaning roller is elliptical in shape and is made of sponge material, and the raised end of the cleaning roller completely covers the travel path of the detection mechanism.

[0022] By adopting the above technical solution, as the mounting cover is pressed downward, the cleaning roller is deformed, thereby further increasing the contact area between the cleaning roller and the surface of the drill assembly, and further increasing the cleaning area of ​​the cleaning roller, thereby ensuring that the walking path of the rotating ball remains clean and tidy, and further improving the accuracy of data collection.

[0023] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art: 1. The present invention can drive the drill assembly to rotate 90° clockwise stably through the setting of the driving mechanism, and the setting of the limiting structure can further improve the accuracy of the driving mechanism driving the drill assembly to rotate 90°, further improve the effectiveness and accuracy of data collection, and make subsequent calculations more accurate. In addition, the setting of the ratchet and the pawl avoids the situation of rotation, further improves the coordination and stability of the device during detection, and can collect data at four points of the drill assembly as required.

[0024] 2. After the limiting ball of the present invention limits the ratchet, the hydraulic cylinder pushes the transmission rack to move again, and the transmission gear ring will continue to rotate, while the ratchet will not rotate due to the restriction of the limiting ball. At this time, the transmission gear ring will squeeze the limiting block toward the inside of the ratchet, thereby facilitating the rotation of the transmission gear ring, forming a mechanism for over-pushing protection, avoiding excessive rotation of the ratchet, and further improving the convenience and stability of the device during operation.

[0025] 3. A flow limiting hole is provided on the flow limiting plate of the present invention, so that the hydraulic oil flows through the flow limiting plate at different speeds, so that when the transmission rack is reset, the hydraulic oil flows back to the inside of the fixed cylinder more slowly, so that there is a delay effect when the limiting ball is reset, so that when the transmission ring gear is reset, the ratchet can be restricted, and the limiting ball cooperates with the pawl to achieve clockwise and counterclockwise locking of the ratchet to avoid the rotation of the ratchet, further improving the stability of the device during operation. In order to improve the fluidity of the hydraulic oil, a flow hole is provided on the flow limiting plate, which can appropriately increase the passability of the hydraulic oil, avoid the device from having a long response time due to the setting of the flow limiting hole, and improve the convenience of use of the device.

[0026] 4. When testing the drill tool assembly, the detection mechanism first performs linear movement detection along the drill tool assembly to observe whether the data of the multimeter is arranged linearly, so as to determine whether the coaxiality problem of the drill tool assembly is caused by its own bending or installation deviation. A judgment can be formed to avoid data anomalies caused by its own bending, reduce the workload of staff, and further improve the efficiency of detection.

[0027] 5. The cleaning structure of the present invention can clean up the debris on the walking path of the detection mechanism to avoid affecting the rotating ball and causing inaccuracy in the detection data. In addition, in order to increase the fit between the cleaning structure and the drill assembly, an elastic structure is provided on the cleaning structure to always keep the surfaces of the cleaning structure and the drill assembly in contact with each other. In addition, the reverse cleaning of the cleaning roller can prevent impurities from entering the cleaning structure, thereby affecting the data collection of the detection mechanism, and further improving the accuracy of data collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a structural schematic diagram of the overall device of the present invention from a first viewing angle; Figure 2 The second viewing angle is a schematic diagram of the structure of the overall device of the present invention; Figure 3 It is a structural schematic diagram of a local structure of the present invention; Figure 4 It is a schematic diagram of the structure of the cooperation between the three-claw centering device and the connecting tube of the present invention; Figure 5 It is a structural schematic diagram of the driving mechanism of the present invention from a first viewing angle; Figure 6 The second viewing angle of the structural schematic diagram of the driving mechanism of the present invention; Figure 7 The third viewing angle of the structural schematic diagram of the driving mechanism of the present invention; Figure 8 The fourth viewing angle is a schematic diagram of the structure of the driving mechanism of the present invention; Fig. 9 It is a structural schematic diagram of the limiting structure of the present invention from a first viewing angle; Fig.10 A second viewing angle of the structural schematic diagram of the limiting structure of the present invention; Fig.11 It is a structural schematic diagram of the current limiting plate of the present invention; Fig.12 This is a first viewing angle of the structural schematic diagram of the detection mechanism of the present invention; Fig.13 The second viewing angle of the structural schematic diagram of the detection mechanism of the present invention; Fig.14 It is a first viewing angle of the structural schematic diagram of the cleaning structure of the present invention; Fig.15 A second viewing angle of the structural schematic diagram of the cleaning structure of the present invention; Fig.16 It is a structural schematic diagram of the cleaning structure of the present invention; Fig.17 It is a structural schematic diagram of the rotating ball of the present invention; Fig.18 For the present invention and Schematic diagram of quadrant judgment.

[0030] In the figure: 1, detection body; 2, three-claw centering device; 3, drilling tool assembly; 4, support frame; 5, connecting tube; 6, bottom plate; 7, auxiliary rotating frame; 8, driving mechanism; 9, hydraulic cylinder; 10, limiting frame; 11, transmission rack; 12, transmission gear ring; 13, mounting ring; 14, ratchet; 15, ratchet; 16, limiting block; 17, auxiliary spring; 18, closing seat; 19, card slot; 20, mounting slot; 21, fixing tube; 22, extrusion piston rod; 23, diverter plate; 24, branch guide tube; 25, mounting tube; 26, fixing frame; 27, piston limiting column; 28, limiting card ball; 2 9. Current limiting plate; 30. Current limiting hole; 31. Flow hole; 32. Linear motor; 33. Connecting frame; 34. Main cylinder; 35. Diverter cylinder; 36. Extrusion piston column; 37. Fixed rod; 38. Extrusion seat; 39. Rotating ball; 40. Cleaning ring; 41. Fixed electrode; 42. Movable electrode; 43. Multimeter; 44. Closing plate; 45. Mounting frame; 46. Electric push rod; 47. Fixed bracket; 48. Strong magnet; 49. Fixed sleeve; 50. Mounting cover; 51. Reset spring; 52. Cleaning roller; 53. Synchronous belt structure; 54. Gear set; 55. Drive motor; 56. Scraper. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below with reference to the embodiments.

[0032] Example 1 like Figure 1-Figure 4 As shown, the present invention provides a coaxiality detection device for a screw drill, comprising: a detection body 1, one end of the detection body 1 is symmetrically rotatably connected with a three-claw centering device 2 for centering a drill assembly 3, and one end of two three-claw centering devices 2 is fixedly connected through a connecting tube 5, the other end of the detection body 1 is fixedly installed with a support frame 4 for supporting the end of the drill assembly 3, and the top of the bottom plate 6 is symmetrically fixedly installed with an auxiliary rotating frame 7 that rotates with the connecting tube 5; The driving mechanism 8 is fixedly mounted inside one end of the detection body 1 and is used to drive the connecting tube 5 to rotate 90° clockwise. The driving mechanism 8 includes a hydraulic cylinder 9 and a limiting frame 10 fixedly mounted on the upper surface of the bottom plate 6, and the hydraulic cylinder 9 and the limiting frame 10 are arranged in a straight line. A transmission rack 11 is slidably connected inside the limiting frame 10, and one end of the transmission rack 11 is connected to the output end of the hydraulic cylinder 9 through an elastic coupling. A transmission gear ring 12 is meshedly connected above the transmission rack 11, and the transmission gear ring 12 is rotatably connected to the outer ring of the connecting tube 5. The detection mechanism is fixedly mounted on one side of the detection body 1 and is used to detect the deviation of the drilling tool assembly 3 .

[0033] In this embodiment, when the coaxiality detection of the drill tool assembly 3 is required, the drill tool assembly 3 is first placed inside the device, and then it is clamped in the center by the three-claw centering device 2. Then, the detection mechanism starts to operate in stages, firstly judging whether the coaxiality problem is caused by the bending of the drill tool assembly 3 itself. After eliminating the above problem, the detection mechanism operates again, and collects multiple groups of data in multiple cross sections at the detection end of the drill tool assembly 3. The setting of the driving mechanism 8 can make the detection mechanism more accurate in data collection, and ensure that the drill tool assembly 3 is more stable and accurate during the rotation process; After the radial measurement value reading and calculation of the 0° test point is completed by the detection mechanism, the driving mechanism 8 drives the drill assembly 3 to rotate 90°, and the radial measurement value test steps of the above test points are repeated again to calculate the left side of the 90° position. After that, according to the above test steps, the radial measurement values ​​of 180° and 270° are tested in sequence; Subsequently, a coordinate system is established, and the drilling tool assembly 3 clamped by the three-jaw centering device 2 is set as the coordinate origin. After that, the four sets of radial measurement values ​​tested are substituted into Formula 2 to calculate the actual position of the axis of the unclamped end of the drilling tool assembly 3; Formula 2:

[0034]

[0035] Then put the obtained data into formula 3 to calculate and ; Formula 3:

[0036]

[0037] Where N is the number of measurement points; Finally, by calculating and Substitute it into formula 4 to calculate the total offset and offset angle. Formula 4: Total offset

[0038] Offset Direction

[0039] Then calculate the actual data to determine the total offset and offset direction Determine how much thickness of a shim is added at a certain point of the connection end of the drilling tool assembly 3 to correct the coaxiality of the drilling tool assembly 3 .

[0040] like Figure 5-Figure 8 As shown, preferably, the driving mechanism 8 also includes two mounting rings 13 fixedly mounted inside the detection body 1, the inner ring of the mounting ring 13 is rotatably connected to a ratchet 14, the outer ring of the mounting ring 13 is rotatably connected to a plurality of pawls 15 through a torsion spring, and the pawls 15 and the ratchet 14 are squeezed together, one side of the ratchet 14 is equidistantly slidably connected to a plurality of limiting blocks 16, and the plurality of limiting blocks 16 are squeezed together with the side walls of the transmission gear ring 12, one end of the limiting block 16 extends to the inside of the ratchet 14 and is sleeved with an auxiliary spring 17, the outer ring of the ratchet 14 is threadedly connected to a plurality of closing seats 18 corresponding to the position of the limiting block 16, one end of the limiting frame 10 is fixedly mounted with a limiting structure for limiting the rotation of the transmission gear ring 12, and the outer ring of the ratchet 14 is equidistantly provided with card slots 19 that are snap-fitted with the limiting blocks 16.

[0041] In this embodiment, after the detection mechanism completes the data collection of a data point of the cross section, the driving mechanism 8 drives the drill assembly 3 to rotate 90° clockwise, so as to facilitate the data collection of the next data point. At this time, the hydraulic cylinder 9 drives the transmission rack 11 to move linearly along the limiting frame 10, and then drives the transmission ring gear 12 to rotate through the transmission rack 11, and the transmission ring gear 12 is clamped and restricted by the limiting block 16 and the ratchet 14. As the transmission ring gear 12 rotates, the ratchet 14 will synchronously drive the connecting tube 5 to rotate, and the connecting tube 5 cooperates with the three-claw centering device 2 to restrict the drill assembly 3. As the connecting tube 5 rotates, the drill assembly 3 will rotate synchronously to realize the change of the data point, and the transmission rack 11 will drive the limiting structure to limit the position of the ratchet 14 during the movement. After rotating 90°, the limiting structure will be inserted into the groove of the outer ring of the ratchet 14 to prevent the ratchet 14 from rotating excessively and causing inaccurate data. After that, the hydraulic cylinder 9 starts to drive the transmission rack 11 to reset. At this time, the ratchet 14 will not rotate due to the restriction of the pawl 15, and the limiting block 16 begins to shrink toward the inside of the ratchet 14 under the extrusion of the transmission ring gear 12 and the ratchet 14. As the limiting block 16 shrinks, the transmission ring gear 12 and the ratchet 14 are separated, so that the transmission ring gear 12 can be reset, which is convenient for the device and further improves the accuracy of data collection. In addition, as the transmission rack 11 is reset, the transmission rack 11 will drive the limiting structure to release the limit, which is convenient for the transmission rack 11 to drive the device to rotate 90° and limit the device again, thereby improving the stability of the device during operation.

[0042] Example 2 When the driving mechanism 8 rotates the device, the hydraulic cylinder 9 will drive the transmission rack 11 to cooperate with the transmission ring gear 12 to drive the ratchet 14 to rotate. However, the driving stroke of the hydraulic cylinder 9 and the transmission rack 11 cannot perform a precise 90° rotation, which makes the collected data inaccurate. Therefore, the device is provided with a limiting structure for limiting the ratchet 14, which can ensure that the device maintains a precise 90° rotation when rotating.

[0043] like Fig. 9 and Fig.10 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the limiting structure includes a fixed cylinder 21 fixedly installed inside the limiting frame 10 at one end away from the hydraulic cylinder 9, one end of the transmission rack 11 is provided with a mounting groove 20 for mounting and cooperating with the fixed cylinder 21, the interior of the fixed cylinder 21 is slidably connected with an extrusion piston rod 22, and the end of the extrusion piston rod 22 is fixedly connected to the end of the transmission rack 11, the end of the fixed cylinder 21 away from the fixed cylinder 21 is fixedly connected to the input end of the diverter plate 23, and two branch ducts 24 are fixedly installed at the output end of the diverter plate 23, and the ends of the two branch ducts 24 away from the diverter plate 23 are fixedly installed with mounting tubes 25, the outer parts of the two mounting tubes 25 are sleeved with a fixed frame 26, and the fixed frame 26 is fixedly connected to the inner wall of the detection body 1, and the end of the mounting tube 25 away from the branch duct 24 is slidably connected with a piston limiting column 27, and the end of the piston limiting column 27 is fixedly installed with a limiting clamping ball 28, and the piston limiting column 27 cooperates with the limiting clamping ball 28 to be squeezed and matched with the outer ring of the ratchet 14.

[0044] In this embodiment, when the hydraulic cylinder 9 drives the transmission rack 11 to move, the transmission rack 11 squeezes the piston rod 22 to make the hydraulic oil in the fixed cylinder 21 flow along the diverter plate 23 and the branch conduit 24 to the mounting tube 25 respectively. As the hydraulic oil in the mounting tube 25 accumulates, the piston limiting column 27 and the limiting ball 28 are pushed to the outside of the mounting tube 25. As the limiting ball 28 moves, the ratchet 14 rotates synchronously. As the ratchet 14 rotates, the limiting ball 28 is stuck in the groove formed on the side wall of the ratchet 14, forming a limit on the position of the ratchet 14, avoiding excessive movement of the ratchet 14, increasing the accuracy of the device during data acquisition, and making it more convenient to use. As the transmission rack 11 is reset, the hydraulic oil in the mounting tube 25 flows back to the fixed cylinder 21, and the limiting ball 28 is reset, thereby releasing the limit of the limiting ball 28 on the ratchet 14, making it convenient for the ratchet 14 to rotate again later. In addition, after the limiting ball 28 restricts the ratchet 14, the hydraulic cylinder 9 pushes the transmission rack 11 to move again, and the transmission ring gear 12 will continue to rotate, while the ratchet 14 will not rotate due to the restriction of the limiting ball 28. At this time, the transmission ring gear 12 will squeeze the limiting block 16 into the inside of the ratchet 14, thereby facilitating the rotation of the transmission ring gear 12, forming a mechanism for over-pushing protection, avoiding excessive rotation of the ratchet 14, and further improving the convenience and stability of the device during operation.

[0045] like Fig.11 As shown, preferably, a flow limiting plate 29 is fixedly installed inside the mounting tube 25, and the flow limiting plate 29 has flow limiting holes 30 equidistantly provided in a ring shape, and a flow hole 31 equidistantly provided in a ring shape in the center of the flow limiting plate 29.

[0046] In this embodiment, a limiting plate 29 is fixedly installed inside the mounting tube 25. After the hydraulic oil enters the mounting tube 25, the hydraulic oil will push the piston limiting column 27 through the limiting plate 29. Therefore, a limiting hole 30 is provided on the limiting plate 29, so that the hydraulic oil passes through the limiting plate 29 at different speeds, so that when the transmission rack 11 is reset, the hydraulic oil flows back to the inside of the fixed tube 21 more slowly, so that there is a delay effect when the limiting ball 28 is reset, so that when the transmission ring gear 12 is reset, the ratchet 14 can be restricted. The limiting ball 28 cooperates with the pawl 15 to achieve clockwise and counterclockwise locking of the ratchet 14, avoiding the rotation of the ratchet 14, further improving the stability of the device during operation, and in order to improve the fluidity of the hydraulic oil, a flow hole 31 is provided on the limiting plate 29, which can appropriately increase the passability of the hydraulic oil, avoid the device from having a long response time due to the setting of the limiting hole 30, and improve the convenience of use of the device.

[0047] Example 3 like Fig.12 , Fig.13 , Fig.14 , Fig.15 and Fig.17As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the detection mechanism includes a linear motor 32 fixedly installed on one side of the detection body 1, the output end of the linear motor 32 is fixedly installed with a connecting frame 33, the bottom end of the connecting frame 33 is fixedly installed with a main body tube 34, the top of the main body tube 34 is fixedly installed with a shunt tube 35, the bottom end of the main body tube 34 is slidably connected with an extrusion piston column 36, the bottom end of the extrusion piston column 36 is fixedly installed with a fixing rod 37, the bottom end of the fixing rod 37 is fixedly installed with an extrusion seat 38, the bottom end of the extrusion piston column 36 is rotatably connected with a rotating ball 39, and the rotating ball 39 is rotatably connected with the rotating ball 39. The moving ball 39 is squeezed and fitted with the extrusion seat 38, a cleaning ring 40 is fixedly installed inside the bottom end of the extrusion piston column 36, and the cleaning ring 40 is squeezed and fitted with the rotating ball 39, a fixed electrode 41 is fixedly installed at the bottom end of the inner part of the shunt tube 35, and a movable electrode 42 is installed at the top of the shunt tube 35, one end of the fixed electrode 41 and the movable electrode 42 pass through the side wall of the shunt tube 35 and are electrically connected to the input end of the multimeter 43, and the multimeter 43 is fixedly installed on one side of the main tube 34, and a sealing structure is installed at the connecting end of the main tube 34 and the shunt tube 35, and a cleaning structure is fixedly installed at the bottom of the main tube 34.

[0048] In this embodiment, when testing the drilling tool assembly 3, the detection mechanism first performs a linear movement detection along the drilling tool assembly 3 to observe whether the data of the multimeter 43 is arranged linearly, so as to determine whether the coaxiality problem of the drilling tool assembly 3 is caused by its own bending or installation deviation; After detecting the coaxiality problem caused by the installation deviation, the linear motor 32 drives the detection end of the detection mechanism to move to a measuring point. At this time, due to the offset of the drill assembly 3, the extrusion piston column 36 is tightly attached to the surface of the drill assembly 3, and will move up and down following the offset of the drill assembly 3. As the extrusion piston column 36 moves up and down, the extrusion piston column 36 will push the test liquid inside the main tube 34 into the diverter tube 35, and as the test liquid flows into the diverter tube 35, the position of the movable electrode 42 will move up and down. After the liquid inside the diverter tube 35 is stable, the connection between the main tube 34 and the diverter tube 35 is achieved through the blocking structure. After that, a loop is formed by the fixed electrode 41, the movable electrode 42 and the test liquid, and the measurement value is read by the multimeter 43, and it is brought into the formula 1 to calculate the measurement value. After that, the driving device is driven by the driving mechanism 8 to rotate 90°, and the measurement data is collected again. After completing the data collection of a circle, the detection mechanism moves to the next measurement point to collect the next set of data; In addition, the main tube 34 and the diverter tube 35 form a complete channel, and part of the test liquid is at the bottom of the diverter tube 35, so that an initial spacing is formed between the fixed electrode 41 and the movable electrode 42. The value of this spacing is definite and knowable, which is convenient for subsequent data measurement and calculation. In addition, the cross-sectional ratio of the main tube 34 and the diverter tube 35 is 1:10.

[0049] When the device is in operation, the symmetrically arranged three-claw centering device 2 adjusts the reference degree of one end of the drilling tool assembly 3. After that, the 0° position of a certain cross section of the drilling tool assembly 3 is tested by the detection mechanism, and the value read in the detection mechanism is brought into Formula 1 to form the radial measurement value of the 0° test point. Formula 1: ; Where R is the resistance value, A is the cross-sectional area, is the resistivity of the material, k is the cross-sectional ratio of the main tube 34 and the diverter tube 35; Furthermore, the testing format of the testing agency is divided into several different steps; The first step: the detection mechanism first moves linearly along the top of the drilling tool assembly 3, starting from the detection position and running to the tail end of the drilling tool assembly 3, and performs a one-time continuous detection. By reading the R value of the detection mechanism, it is judged whether the detection end of the drilling tool assembly 3 is bent in the middle (that is, the drilling tool assembly 3 itself is bent) by whether it is arranged in a linear manner. If a nonlinear arrangement is present, it is judged that there is a problem with the drilling tool assembly 3 itself and a correction process is required. If a linear arrangement is present, the subsequent steps of detection are performed; The second step: collect data of multiple cross sections at the detection end of the drilling tool assembly 3, then calculate and compare the data of multiple cross sections, eliminate abnormal data, and then take the average value to reduce random errors.

[0050] like Fig.13 As shown, preferably, a floating plate is fixedly installed on the top of the movable electrode 42, and the floating plate is made of foam material.

[0051] In this embodiment, the setting of the floating plate of the movable electrode 42 can make the movable electrode 42 float stably on the top of the test liquid, which is convenient for adjusting the distance between the fixed electrode 41 and the movable electrode 42 by changing the liquid level inside the diversion tube 35, and convenient for obtaining the radial measurement value of the measuring point.

[0052] like Fig.16As shown, preferably, the blocking structure includes a closing plate 44 slidably connected to the inside of the top of the main tube 34, a mounting frame 45 is fixedly installed on one side of the top of the main tube 34, an electric push rod 46 is fixedly installed on one end of the mounting frame 45, and an output end of the electric push rod 46 is fixedly installed with a fixed bracket 47 through the side wall of the mounting frame 45, and a strong magnet 48 is fixedly installed on the fixed bracket 47.

[0053] In this embodiment, after the liquid inside the diverter tube 35 is stabilized, the electric push rod 46 pushes the fixed bracket 47 and the strong magnet 48 to move, and then pushes the closing plate 44 inside the main tube 34 to move through the magnetic force, so as to close the connecting end of the main tube 34 and the diverter tube 35, so that the test liquid inside the main tube 34 and the diverter tube 35 can be separated, thereby increasing the data accuracy of the radial measurement value of the measuring point, and the closing plate 44 and the strong magnet 48 form a stable magnetic matching structure.

[0054] Example 4 When the detection mechanism moves, the debris attached to the surface of the drill assembly 3 will affect the data measurement accuracy of the detection mechanism. Therefore, a cleaning structure is provided at the bottom of the detection mechanism of the device, which can clean the walking path of the detection mechanism when the detection mechanism is moving to prevent the debris from affecting the movement of the rotating ball 39.

[0055] like Fig.14 and Fig.15 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the cleaning structure includes a fixed sleeve 49 fixedly mounted on the bottom end of the main body tube 34, the bottom end of the fixed sleeve 49 is slidably connected with a mounting cover 50, the bottom end of the fixed sleeve 49 is sleeved with a reset spring 51, and the reset spring 51 is arranged inside the mounting cover 50, the bottom end of the mounting cover 50 is symmetrically rotatably connected with a cleaning roller 52, one end of the two cleaning rollers 52 is respectively fixedly connected to one end of two synchronous belt structures 53, the inside of the mounting cover 50 is rotatably connected with a gear set 54, the other ends of the two synchronous belt structures 53 are respectively fixedly connected to the two gear sets 54, a drive motor 55 is fixedly mounted inside the mounting cover 50, and the output end of the drive motor 55 is fixedly connected to one of the gear sets 54, and the bottom end of the mounting cover 50 is symmetrically rotatably connected with a scraper 56.

[0056] In this embodiment, when the detection mechanism is moving, the drive motor 55 drives the gear set 54 to rotate, and the gear set 54 and the synchronous belt structure 53 are in transmission cooperation. As the gear set 54 rotates, the cleaning roller 52 will rotate synchronously in the opposite direction, so that the cleaning roller 52 cleans the debris on the path of the detection mechanism to the outside of the mounting cover 50, so as to prevent the debris from entering the mounting cover 50 and affecting the rotating ball 39, thereby preventing inaccurate data. In addition, when the drilling tool assembly 3 rotates, the scraper 56 will also clean the debris on the path. In addition, in order to increase the fit between the cleaning structure and the surface of the drilling tool assembly 3, a fixing sleeve 49 and a reset spring 51 are provided at the bottom end of the main tube 34. The reset spring 51 can press the mounting cover 50 downward so that the mounting cover 50 can fit tightly to the surface of the drilling tool assembly 3, further improving the cleanliness of the device during use, and improving the accuracy of data acquisition.

[0057] like Figure 1-Figure 5 As shown, preferably, the cleaning roller 52 is elliptical in shape and is made of sponge material, and the raised end of the cleaning roller 52 completely covers the travel path of the detection mechanism.

[0058] In this embodiment, as the mounting cover 50 is pressed downward, the cleaning roller 52 is deformed, further increasing the contact area between the cleaning roller 52 and the surface of the drill assembly 3, and further increasing the cleaning area of ​​the cleaning roller 52, thereby ensuring that the walking path of the rotating ball 39 remains clean and tidy, and further improving the accuracy of data collection.

[0059] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A coaxiality detection device for a screw drill, characterized in that: include: A detection body (1), one end of the detection body (1) is symmetrically rotatably connected to a three-claw centering device (2) for centering a drilling tool assembly (3), and one end of two three-claw centering devices (2) are fixedly connected via a connecting tube (5); the other end of the detection body (1) is fixedly mounted with a support frame (4) for supporting the end of the drilling tool assembly (3); and the top of the bottom plate (6) is symmetrically fixedly mounted with an auxiliary rotating frame (7) that is rotatably matched with the connecting tube (5); A driving mechanism (8) is fixedly mounted inside one end of the detection body (1) and is used to drive the connecting tube (5) to rotate 90 degrees clockwise. The driving mechanism (8) comprises a hydraulic cylinder (9) and a limiting frame (10) fixedly mounted on the upper surface of the base plate (6), and the hydraulic cylinder (9) and the limiting frame (10) are arranged in a straight line. A transmission rack (11) is slidably connected inside the limiting frame (10), and one end of the transmission rack (11) is connected to the output end of the hydraulic cylinder (9) via an elastic coupling. A transmission gear ring (12) is meshedly connected above the transmission rack (11), and the transmission gear ring (12) is rotatably connected to the outer ring of the connecting tube (5); A detection mechanism is fixedly mounted on one side of the detection body (1) and is used to detect the degree of deviation of the drilling tool assembly component (3).

2. The coaxiality detection device for a screw drill according to claim 1, characterized in that: The driving mechanism (8) further comprises two mounting rings (13) fixedly mounted inside the detection body (1), the inner ring of the mounting ring (13) being rotatably connected to a ratchet (14), the outer ring of the mounting ring (13) being rotatably connected to a plurality of ratchets (15) via a torsion spring, and the ratchets (15) and the ratchet (14) being pressed together, a plurality of limiting blocks (16) being equidistantly slidably connected to one side of the ratchet (14), and the plurality of limiting blocks (16) being pressed together with the side wall of the transmission gear ring (12), one end of the limiting block (16) extending to the inside of the ratchet (14) being sleeved with an auxiliary spring (17), the outer ring of the ratchet (14) being threadedly connected to a plurality of closing seats (18) at positions corresponding to the limiting blocks (16), a limiting structure for limiting the rotation of the transmission gear ring (12) being fixedly mounted on one end of the limiting frame (10), and a card slot (19) for card-engaging with the limiting blocks (16) being equidistantly opened on the outer ring of the ratchet (14).

3. The coaxiality detection device for a screw drill according to claim 2, characterized in that: The limiting structure comprises a fixed cylinder (21) fixedly mounted inside an end of the limiting frame (10) away from the hydraulic cylinder (9); one end of the transmission rack (11) is provided with a mounting groove (20) for mounting with the fixed cylinder (21); an extrusion piston rod (22) is slidably connected inside the fixed cylinder (21); the end of the extrusion piston rod (22) is fixedly connected to the end of the transmission rack (11); the end of the fixed cylinder (21) away from the fixed cylinder (21) is fixedly connected to the input end of the diverter plate (23); and the output end of the diverter plate (23) is fixedly mounted with two diverters. The two branch conduits (24) are fixedly mounted with mounting tubes (25) at one end away from the diverter plate (23), the two mounting tubes (25) are sleeved with fixing frames (26) on the outside, and the fixing frames (26) are fixedly connected to the inner wall of the detection body (1), and the mounting tubes (25) are slidably connected with a piston limiting column (27) at one end away from the branch conduits (24), and a limiting clamping ball (28) is fixedly mounted at the end of the piston limiting column (27), and the piston limiting column (27) cooperates with the limiting clamping ball (28) to be squeezed and fitted with the outer ring of the ratchet (14).

4. The coaxiality detection device for a screw drill according to claim 3, characterized in that: A flow limiting plate (29) is fixedly mounted inside the mounting tube (25), the flow limiting plate (29) is provided with flow limiting holes (30) in an annular shape and at equal intervals, and the center of the flow limiting plate (29) is provided with flow holes (31) in an annular shape and at equal intervals.

5. The coaxiality detection device for a screw drill according to claim 4, characterized in that: The detection mechanism comprises a linear motor (32) fixedly mounted on one side of the detection body (1); a connecting frame (33) is fixedly mounted on the output end of the linear motor (32); a main body tube (34) is fixedly mounted on the bottom end of the connecting frame (33); a shunt tube (35) is fixedly mounted on the top end of the main body tube (34); an extrusion piston column (36) is slidably connected to the bottom end of the main body tube (34); a fixed rod (37) is fixedly mounted on the bottom end of the extrusion piston column (36); an extrusion seat (38) is fixedly mounted on the bottom end of the fixed rod (37); a rotating ball (39) is rotatably connected to the bottom end of the extrusion piston column (36); and a rotation ball (39) is rotatably mounted between the rotating ball (39) and the extrusion seat (38). The extrusion piston rod (36) is extruded and fitted with a cleaning ring (40) fixedly installed inside the bottom end thereof, and the cleaning ring (40) is extruded and fitted with the rotating ball (39), a fixed electrode (41) is fixedly installed inside the bottom end of the shunt tube (35), and a movable electrode (42) is installed at the top end of the shunt tube (35), one end of each of the fixed electrode (41) and the movable electrode (42) passes through the side wall of the shunt tube (35) and is electrically connected to the input end of a multimeter (43), and the multimeter (43) is fixedly installed on one side of the main tube (34), a blocking structure is installed at the connecting end of the main tube (34) and the shunt tube (35), and a cleaning structure is fixedly installed at the bottom of the main tube (34).

6. The coaxiality detection device for a screw drill according to claim 5, characterized in that: A floating plate is fixedly mounted on the top of the movable electrode (42), and the floating plate is made of foam material.

7. A coaxiality detection device for a screw drill according to claim 6, characterized in that: The blocking structure comprises a closing plate (44) slidably connected to the interior of the top end of the main body tube (34); a mounting frame (45) is fixedly mounted on one side of the top of the main body tube (34); an electric push rod (46) is fixedly mounted on one end of the mounting frame (45); an output end of the electric push rod (46) passes through a side wall of the mounting frame (45) and is fixedly mounted with a fixed bracket (47); a strong magnet (48) is fixedly mounted on the fixed bracket (47).

8. The coaxiality detection device for a screw drill according to claim 7, characterized in that: The cleaning structure comprises a fixing sleeve (49) fixedly mounted on the bottom end of the main body tube (34); the bottom end of the fixing sleeve (49) is slidably connected to a mounting cover (50); the bottom end of the fixing sleeve (49) is sleeved with a return spring (51), and the return spring (51) is arranged inside the mounting cover (50); the bottom end of the mounting cover (50) is symmetrically rotatably connected to a cleaning roller (52); one end of the two cleaning rollers (52) is respectively fixedly connected to one end of two synchronous belt structures (53); the inside of the mounting cover (50) is rotatably connected to a gear set (54); the other ends of the two synchronous belt structures (53) are respectively fixedly connected to the two gear sets (54); a driving motor (55) is fixedly mounted inside the mounting cover (50); the output end of the driving motor (55) is fixedly connected to one of the gear sets (54); and the bottom end of the mounting cover (50) is symmetrically rotatably connected to a scraper (56).

9. The coaxiality detection device for a screw drill according to claim 8, characterized in that: The cleaning roller (52) is arranged in an elliptical shape and is made of a sponge material; the raised end of the cleaning roller (52) completely covers the travel path of the detection mechanism.

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