Drill rod joint end face grinding device

Abstract

The drill rod joint end face grinding device comprises a grinding mechanism, and the grinding mechanism comprises a core rod, a grinding head and a first motor; the core rod is provided with a cylindrical guide shaft, and one end of the guide shaft is provided with external threads; the grinding head sleeves the outer wall of the guide shaft, a grinding layer capable of grinding the end face of the drill rod joint is arranged on the end face of the end, close to the core rod external thread, of the grinding head, and a first motor is connected to the end, away from the core rod external thread, of the grinding head and used for driving the grinding head to rotate around the axis of the guide shaft. Compared with the prior art, the coping device can be connected with the drill rod and the grinding head through the core rod, so that the drill rod and the grinding head are aligned and positioned, and the grinding quality is improved. The conveying mechanism is matched with the drill rod positioning and fixing mechanism, so that the drill rod can be conveyed in place, clamped and positioned, and manual hoisting is omitted; and by arranging the lifting double-roller wheel frame, the grinding condition of the drill rod can be observed in time through automatic operation of the double-roller wheel frame in the repairing process, and the grinding quality can be controlled at any time.

Description

Technical Field

[0001] The invention relates to the technical field of petroleum drilling equipment, in particular to a drill rod joint end face grinding device. Background Art

[0002] Drill pipe is a commonly used tool in drilling operations. After use and during transportation, tiny defects such as burrs, scratches, and sand holes will appear on the threaded end of the drill pipe. If it is not treated and used again in the well, high-pressure drilling fluid will leak from the end surface where the two sections of the drill pipe are connected, causing pressure drop, drilling fluid loss, and pollution of the drilling system. This project aims to solve the problem of repairing these tiny defects on the end of the drill pipe.

[0003] The existing technology uses manual hoisting of drill pipes, which requires the coordination of cranes and auxiliary personnel; manual grinding uses simple tools, and the drill pipe and grinding head cannot be aligned and positioned, which easily leads to random deviation or over-grinding, and the grinding quality cannot be guaranteed. The use of large hoisting equipment and manual control of high-speed rotating grinding tools by workers during the operation pose safety hazards and are labor-intensive. Summary of the invention

[0004] The invention provides a drill rod joint end face grinding device to solve the problem in the prior art that the drill rod and the grinding head cannot be aligned and positioned, thereby improving the grinding quality.

[0005] The present invention provides a drill rod joint end face grinding device, comprising a grinding mechanism, wherein the grinding mechanism comprises a core rod, a grinding head and a first motor; the core rod has a cylindrical guide shaft, one end of the guide shaft is provided with an external thread matching the drill rod internal thread; the grinding head is sleeved on the outer wall of the guide shaft, a grinding layer capable of grinding the drill rod joint end face is provided on the end face of the grinding head close to the external thread of the core rod, the end of the grinding head away from the external thread of the core rod is connected to the first motor, and the first motor is used to drive the grinding head to rotate around the axis of the guide shaft.

[0006] In one embodiment, the grinding mechanism also includes an adjusting mechanism, which includes a lifting platform, a transverse slide and a longitudinal slide; the first motor is fixedly mounted on the longitudinal slide, and the output shaft of the first motor extends in a horizontal direction; the longitudinal slide is slidably mounted on the transverse slide, and the longitudinal slide can move in a direction parallel to the output shaft of the first motor; the transverse slide is slidably mounted on the top of the lifting platform, and the transverse slide can move in a horizontal plane in a direction perpendicular to the output shaft of the first motor.

[0007] In one embodiment, it also includes a second motor, which is fixedly mounted on the longitudinal drag plate. The output shaft of the second motor is parallel to the output shaft of the first motor. The output shaft of the second motor can form a detachable connection with the other end of the mandrel and drive the mandrel to rotate.

[0008] In one embodiment, it also includes a drill rod positioning and fixing mechanism, which includes at least two groups of centering clamps, and the at least two groups of centering clamps are arranged at intervals in a direction parallel to the first motor output shaft, and the centering clamps are used to clamp and center the drill rod.

[0009] In one embodiment, each set of the centering clamps includes two clamps and a drive assembly, and the drive assembly is used to drive the two clamps to move closer to or away from each other to achieve clamping or releasing of the drill rod.

[0010] In one embodiment, the driving assembly includes a fixed frame, a second cylinder, two guide shafts, a gear, and two racks; the gear is rotatably mounted on the fixed frame via a rotating shaft, the gear is arranged between the two racks and meshes with the two racks respectively, the two racks are parallel to each other and slidably mounted on the fixed frame; the second cylinder connects and drives one of the racks to reciprocate along its length direction; the two guide shafts are parallel to the two racks, and the two guide shafts are fixedly mounted on the fixed frame; the two clamps are respectively fixedly mounted on the two racks, and each clamp is slidably connected to the two guide shafts at the same time and can slide along the guide shafts.

[0011] In one embodiment, it also includes a conveying mechanism, which includes at least two roller frames, and the at least two roller frames are arranged at intervals in a direction parallel to the output shaft of the first motor; the two roller frames are used to carry the drill rod, and the rollers on the roller frames can drive the drill rod to reciprocate along its axial direction when rolling.

[0012] In one embodiment, it also includes a sensing probe and a controller, wherein the controller is respectively connected to the roller frame and the sensing probe; the sensing probe is configured to send a signal to the controller when the drill rod enters the grinding position or leaves the removal position; and the controller is configured to control the roller frame to stop running after receiving the signal.

[0013] In one embodiment, the conveying mechanism also includes at least two liftable flip frames, and the at least two liftable flip frames are arranged at intervals in a direction parallel to the output shaft of the first motor; the liftable flip frame includes a first cylinder and a guide rail, and the top of the guide rail is provided with two single-sided inclined steps, and the first cylinder is used to connect and drive the guide rail to rise and fall; a feed rack and a discharging rack are respectively provided on both sides of the liftable flip frame, and the feed rack is arranged on the side of the step inclined upward, and the discharging rack is arranged on the side of the step inclined downward.

[0014] In one embodiment, it also includes at least two liftable roller frames, which are arranged at intervals in a direction parallel to the output shaft of the first motor; each roller frame includes a third cylinder and a roller frame, and the third cylinder is used to drive the roller frame to rise and fall. The two roller frames are used to carry the drill rod, and the rollers on the roller frames can drive the drill rod to rotate along its axis when rolling.

[0015] In one embodiment, a dust suction device is further included, wherein the dust suction device is used to collect dust, rust and sand.

[0016] In one embodiment, the grinding head is connected to the output shaft of the first motor via a spline.

[0017] In one embodiment, the grinding layer is sandpaper adhered to the end surface of the grinding head.

[0018] Compared with the prior art, the advantage of the present invention is that the drill pipe joint end face grinding device of the present invention can connect the drill pipe and the grinding head through a core rod, realize the alignment and positioning of the drill pipe and the grinding head, and improve the grinding quality. Through the cooperation of the conveying mechanism and the drill pipe positioning and fixing mechanism, the drill pipe can be conveyed to the right place and supported and positioned, and manual lifting is omitted; by setting a liftable roller frame, the automatic operation of the roller frame during the repair process can timely observe the grinding condition of the drill pipe, control the grinding quality at any time, and automatically stop the machine for inspection during the processing. For minor damage to the drill pipe, one person at one workstation can repair the drill pipe to meet the standard requirements. The drill pipe joint end face grinding device is simple to operate, has low technical requirements for personnel, low operating cost, short repair time, no degradation of the drill pipe, and high economy. The equipment has a high degree of mechanization and automation, good grinding quality and high efficiency; it saves manpower and improves safety.

[0019] By using the drill rod joint end face grinding device of the present invention to grind the drill rod end face, one drill rod can be finished every 3 to 5 minutes on average. If 15 drill rods are ground per hour, about 100 drill rods can be ground per day on average, thus greatly improving the drill rod repair efficiency.

[0020] The present invention can greatly improve the automation level of the equipment and save labor. While improving the efficiency of drill pipe repair, it can ensure the quality of drill pipe end face repair. The equipment is simple to manufacture and install, and can be promoted to various pipe teams through project-based operation, with good promotion prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0022] Figure 1 2 is a schematic structural diagram of a drill rod joint end face grinding device according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 It is a structural schematic diagram of a lifting flap frame in an embodiment of the invention;

[0025] Figure 4 is a schematic structural diagram of a roller frame in an embodiment of the invention;

[0026] Figure 5 is a schematic structural diagram of a centering clamp in an embodiment of the invention;

[0027] Figure 6 It is a schematic structural diagram of a pair of roller frames in an embodiment of the invention.

[0028] Reference numerals:

[0029] 1. Discharging rack; 2. Feeding rack; 3. Drill rod; 4. Roller rack; 5. Liftable flap rack; 6. Liftable roller rack; 7. Centering clamp; 8. Induction probe; 9. Base; 10. Dust suction device; 11. Mandrel; 12. Grinding head; 13. Flower keyboard; 14. First motor; 15. Second motor; 16. Longitudinal slide; 17. Horizontal slide; 18. Lifting platform; 19. Hand wheel; 20. Scissor fork lifting arm; 21. Platform; 22. Guide rail; 23. First cylinder; 24. Guide sleeve; 25. First roller; 26. First bracket; 27. Third motor; 28. Clamp; 29. ​​Fixed rack; 30. Second cylinder; 31. Guide shaft; 32. Gear; 33. Rack; 34. Third cylinder; 35. Second roller; 36. Second bracket; 37. Fourth motor. DETAILED DESCRIPTION

[0030] The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Embodiment 1

[0032] like Figure 1 As shown, the present invention provides a drill rod 3 joint end surface grinding device, which is mainly composed of a grinding mechanism, a conveying mechanism, a drill rod positioning and fixing mechanism and a liftable roller frame 6.

[0033] The grinding mechanism is used to grind the end face of the drill pipe 3 joint, such as Figure 2 As shown, the grinding mechanism includes a core rod 11, a grinding head 12, a first motor 14, a second motor 15 and an adjusting mechanism.

[0034] The core rod 11 has a cylindrical guide shaft 31, one end of which is provided with an external thread that matches the internal thread of the drill rod 3. The core rod 11 is screwed into the internal thread at the end of the drill rod 3 through the external thread so that the two are tightly matched to ensure that the guide shaft 31 in the middle of the core rod 11 is consistent with the axis of the drill rod 3; the other end of the core rod 11 is provided with a right prism, such as an external hexagonal prism, and the external thread, guide column and external hexagon are coaxially arranged.

[0035] The grinding head 12 is preferably a cylindrical structure, and the grinding head 12 is sleeved on the outer wall of the guide shaft 31. The grinding head 12 can rotate and slide with the guide shaft 31 as a reference. A grinding layer that can grind the end face of the joint of the drill rod 3 is provided on the end face of the grinding head 12 close to the external thread of the mandrel 11, and the grinding layer is preferably a sandpaper pasted on the end face of the grinding head 12; an inner spline hole is provided on the end of the grinding head 12 away from the external thread of the mandrel 11, and a spline keypad 13 that matches the inner spline hole is fixedly connected to the output shaft of the first motor 14. The output shaft of the first motor 14 can be inserted into the inner spline hole of the grinding head 12 through the spline keypad 13, and the grinding head 12 is driven to rotate around the axis of the guide shaft 31. The mandrel 11 is used to achieve alignment and positioning between the drill rod 3 and the grinding head 12, thereby improving the grinding quality.

[0036] The output shaft of the second motor 15 is fixedly connected with an inner hexagonal sleeve that matches the outer hexagonal column of the mandrel 11. The output shaft of the second motor 15 can be inserted into the outer hexagonal column of the mandrel 11 through the inner hexagonal sleeve, driving the mandrel 11 to rotate so that the outer thread of the mandrel 11 is screwed into the inner thread of the end of the drill rod 3. The second motor 15 is preferably a torque motor, so as to provide a stable torque to the mandrel 11.

[0037] The adjustment mechanism is used to carry the first motor 14 and the second motor 15. During the grinding process, there is no need to manually hold the motor for grinding, which greatly reduces the labor intensity of workers. At the same time, the adjustment mechanism can also adjust the height and horizontal position of the first motor 14 and the second motor 15, so that the two motors are aligned and connected with the core rod 11 and the grinding head 12 respectively, which is conducive to improving grinding efficiency. The bottom of the adjustment mechanism is fixedly installed on the base 9. The adjustment mechanism mainly includes a lifting platform 18, a horizontal drag plate 17 and a longitudinal drag plate 16. The lifting platform 18 mainly includes a handwheel 19, a scissor fork lifting arm 20, a slide and a platform 21. The top of the scissor fork lifting arm 20 is installed at the bottom of the platform 21 through a slide. The height of the lifting platform 18 can be adjusted by turning the handwheel 19. The transverse slide 17 is slidably installed on the top of the platform 21 through the first slide rail, the longitudinal slide 16 is slidably installed on the top of the transverse slide 17 through the second slide rail, and the first motor 14 and the second motor 15 are fixedly installed on the top of the longitudinal slide 16; wherein, the output shafts of the first motor 14 and the second motor 15 are parallel to the axial direction of the core rod 11 and the drill rod 3, and the extension direction of the second slide rail is parallel to the output shaft of the first motor 14, so that dragging the longitudinal slide 16 can drive the first motor 14 and the second motor 15 to move in a direction parallel to the output shaft of the first motor 14; the extension direction of the first slide rail is perpendicular to the output shaft of the first motor 14, so that dragging the transverse slide 17 can drive the first motor 14 and the second motor 15 to move in a direction perpendicular to the output shaft of the first motor 14. The positions of the first motor 14 and the second motor 15 are adjusted by the adjustment mechanism, so that the second motor 15 is aligned with the core rod 11 to connect and drive the core rod 11 to rotate and screw into the internal thread of the drill rod 3, and then the second motor 15 is withdrawn from the core rod 11, and then the first motor 14 and the grinding head 12 are aligned and connected to drive the grinding head 12 to rotate and grind the joint end face of the drill rod 3.

[0038] The conveying mechanism is used to convey the drill rod 3 to the grinding position or withdraw from the grinding position. The conveying mechanism includes a feeding frame 2, a discharging frame 1, two lifting and lowering flap frames 5 and two groups of roller frames 4.

[0039] The two liftable flap frames 5 are arranged at intervals in a direction parallel to the output shaft of the first motor 14. Figure 3As shown, the liftable flap frame 5 includes a guide rail 22 and a first cylinder 23. The bottom of the first cylinder 23 is fixedly mounted on the base 9, and the top of the first cylinder 23 is connected to the guide rail 22. The guide rail 22 can be driven to rise or fall by the extension and contraction of the first cylinder 23. Two single-sided inclined steps are arranged on the top of the guide rail 22, and the steps on the top of the guide rail 22 are used to carry and transport the drill rod 3. In order to prevent the guide rail 22 from being compressed and causing the cylinder to deform and bend, guide sleeves 24 are added on both sides of the first cylinder 23. The guide sleeves 24 are vertically mounted, and the fixed bottom end of the sliding sleeve of the guide sleeve 24 is fixedly mounted on the base 9. The slide rail of the guide sleeve 24 is slidably mounted in the guide sleeve 24, and the top of the slide rail is fixedly connected to the bottom of the guide rail 22. The feed rack 2 and the discharging rack 1 are respectively arranged on both sides of the liftable flap rack 5, wherein the feed rack 2 is arranged on the side of the step inclined upward, so that the drill rod 3 on the feed rack 2 can roll onto the guide rail 22 of the liftable flap rack 5, and the discharging rack 1 is arranged on the side of the step inclined downward, so that the drill rod 3 on the guide rail 22 of the liftable flap rack 5 can roll onto the discharging rack 1.

[0040] The two roller frames 4 are arranged at intervals in a direction parallel to the output shaft of the first motor 14, and the two roller frames 4 are used to carry and transport the drill rod 3. Figure 4 As shown, the roller frame 4 includes a first roller 25, a first bracket 26 and a third motor 27. The bottom of the first bracket 26 is fixedly mounted on the base 9. The first roller 25 is rotatably mounted on the first bracket 26 through a rotating shaft. The extension direction of the rotating shaft is perpendicular to the extension direction of the output shaft of the first motor 14. The third motor 27 has a motor reducer, which drives the rotating shaft to rotate and drives the first roller 25 to roll. The diameter of the first roller 25 on the roller frame 4 gradually decreases from both ends to the middle, so that a concave portion is formed in the middle of the first roller 25. The drill rod 3 can be placed in the concave portion of the roller. At this time, the drill rod 3 is parallel to the output shaft of the first motor 14. When the first roller 25 rolls, it drives the drill rod 3 thereon to reciprocate along the axial direction of the drill rod 3. The plane where the smallest cross section of the first roller 25 is located passes through the stepped slope near the side of the discharging frame 1, so that when the drill rod 3 is transferred from the roller frame 4 to the liftable flap frame 5, the drill rod 3 can fall onto the stepped slope near the side of the discharging frame 1. The height of the roller frame 4 is lower than that of the feed frame 2 and the discharge frame 1. The liftable flap frame 5 can transport the drill rod 3 on the feed frame 2 to the roller frame 4. The roller frame 4 transports the drill rod 3 forward to the grinding position for grinding. After the grinding is completed, the roller frame 4 transports the drill rod 3 backward until the drill rod 3 leaves the removal position, and then the drill rod 3 on the roller frame 4 is transported to the discharge frame 1 through the liftable flap frame 5. The grinding position is set between the removal position and the grinding mechanism.

[0041] In the process of the roller frame 4 conveying the drill rod 3 forward and backward, in order to facilitate the judgment of whether it is conveyed to the right place, a sensing probe 8 and a controller may be further provided, and the controller is respectively connected to the roller frame 4 and the sensing probe 8; the sensing probe 8 is preferably an infrared probe, and when the drill rod 3 enters the grinding position or leaves the removal position, the infrared probe sends a signal to the controller; after receiving the signal from the infrared probe, the controller controls the third motor 27 of the roller frame 4 to stop running, the first roller 25 stops rotating, and the conveying of the drill rod 3 stops.

[0042] The drill rod 3 positioning and fixing mechanism is used to fix and center the drill rod 3. The positioning and fixing mechanism includes at least two sets of centering clamps 7. The at least two sets of centering clamps 7 are arranged at intervals in a direction parallel to the output shaft of the first motor 14. The centering clamps 7 are used to clamp and center the drill rod 3. Figure 5 As shown, each set of centering clamps 7 includes two clamps 28 and a driving assembly, and the driving assembly is used to drive the two clamps 28 to move closer to or away from each other to achieve clamping or releasing the drill rod 3. The driving assembly includes a fixed frame 29, a second cylinder 30, two guide shafts 31, a gear 32, and two racks 33; the bottom of the fixed frame 29 is fixedly mounted on the base 9, and the gear 32 is rotatably mounted on the fixed frame 29 through a rotating shaft. The gear 32 is arranged between the two racks 33 and meshes with the two racks 33 respectively. The two racks 33 are arranged parallel to each other, and the extension direction of the racks 33 is perpendicular to the extension direction of the output shaft of the first motor 14. Both racks 33 can be slidably mounted on the fixed frame 29 through a slide rail, and the racks 33 can slide along their length direction; the second cylinder 30 is connected to one of the racks 3 3. The second cylinder 30 is extended and retracted to drive the rack 33 to move back and forth along its length direction. The movement of the rack 33 drives the gear 32 to rotate. The rotation of the gear 32 drives the other rack 33 to move in the opposite direction. The two guide shafts 31 are parallel to the two racks 33. The two guide shafts 31 are fixedly arranged on the fixing frame 29. A clamp 28 is fixedly installed on one of the racks 33 and is slidably connected with the two guide shafts 31. The other clamp 28 is fixedly installed on the other rack 33 and is slidably connected with the two guide shafts 31. The two clamps 28 can slide relative to or away from each other along the guide shafts 31 under the drive of the two racks, so as to clamp or release the drill rod 3.

[0043] The two lifting roller frames 6 are arranged at intervals in a direction parallel to the output shaft of the first motor 14. The two lifting roller frames 6 are used to rotate the drill rod 3 around its own axis, so as to timely observe the grinding condition of the drill rod 3 and control the grinding quality at any time. Figure 6As shown, the liftable roller frame 6 includes a roller frame and a third cylinder 34. The bottom of the third cylinder 34 is fixedly mounted on the base 9. The top of the third cylinder 34 is connected to the roller frame. The roller frame can be driven to rise or fall by the extension and contraction of the third cylinder 34. The roller frame includes two second rollers 35, a second bracket 36 and a fourth motor 37. The bottom of the second bracket 36 is fixedly mounted on the base 9. The two second rollers 35 are rotatably mounted on the second bracket 36 through respective rotating shafts. The extension direction of the two rotating shafts is parallel to the extension direction of the output shaft of the first motor 14. The fourth motor 37 has a motor reducer, which drives the rotating shaft of the second roller 35 to rotate and drives the second roller 35 to roll. A recess is formed between the two second rollers 35, and the drill rod 3 can be placed in the recess. At this time, the drill rod 3 is parallel to the output shaft of the first motor 14. When the second roller 35 rolls, it drives the drill rod 3 thereon to rotate around the axis of the drill rod 3 itself.

[0044] The operation process of grinding the drill pipe 3 end face using the drill pipe joint end face grinding device is as follows:

[0045] Control the first cylinder 23 on the liftable flap frame 5 to extend and lift up, and the two sets of liftable flap frames 5 rise to the same height as the drill rod 3 feed frame 2;

[0046] The drill rod 3 is rolled from the feed rack 2 onto the liftable flap rack 5;

[0047] The first cylinder 23 is controlled to exhaust gas, and the lifting plate frame 5 can lift the drill rod 3 and drop it onto the two sets of roller frames 4;

[0048] The motor reducer of the third motor 27 on the roller frame 4 drives the first roller 25 on the roller frame 4 to rotate, and the drill rod 3 is rolled and transported forward;

[0049] When the infrared probe senses that the drill rod 3 enters the grinding position, the roller frame 4 stops rotating and the drill rod 3 stops moving;

[0050] Control the second cylinder 30 on the centering clamp 7 to drive the two clamps 28 to move closer, clamp the drill rod 3 and center it;

[0051] Screw the mandrel 11 into the internal thread of the drill rod 3 by hand for 3 to 4 turns;

[0052] Turn the hand wheel 19 to adjust the height of the lifting platform 18 so that the center of the grinding head 12 is consistent with the center of the core rod 11;

[0053] Push the transverse carriage 17 to move horizontally (in a direction perpendicular to the output shaft of the first motor 14) on the slide rail on the lifting platform 18, so that the second motor 15 is aligned with the core rod 11;

[0054] Push the longitudinal carriage 16 to insert the inner hexagonal sleeve of the shaft of the second motor 15 into the outer hexagonal column of the mandrel 11;

[0055] The second motor 15 is started to drive the mandrel 11 to be screwed into the internal thread of the drill rod 3;

[0056] Pull the longitudinal carriage 16 to move the second motor 15 away from the mandrel 11;

[0057] Push the horizontal drag plate 17 to align the first motor 14 with the grinding head 12;

[0058] Push the longitudinal carriage 16 to insert the spline key 13 of the first motor 14 into the inner spline hole of the grinding head 12;

[0059] Starting the first motor 14 to drive the grinding head 12 to rotate at high speed;

[0060] Push the longitudinal carriage 16, and the end surface of the grinding head 12 is ground with sandpaper on the end surface of the drill rod 3;

[0061] During grinding, the machine can be stopped for inspection, and the third cylinder 34 of the roller frame 4 can be controlled to lift up, so that the two groups of roller frames 4 rise, the centering clamp 7 is released, and the roller frame 4 holds the drill rod 3;

[0062] The motor reducer of the fourth motor 37 on the elevating roller frame 6 is controlled to drive the second roller 35 to rotate, thereby driving the drill rod 3 to rotate around its own axis, and observing the grinding condition of the end surface of the drill rod 3;

[0063] If grinding is still needed, the centering clamp 7 clamps the drill rod 3, the lifting roller frame 6 is lowered, and grinding continues;

[0064] After the grinding is completed, the lifting plate frame 5 can lift the drill rod 3 and drop it onto the roller frame 4;

[0065] The motor reducer of the third motor 27 on the roller frame 4 drives the first roller 25 on the roller frame 4 to rotate in the opposite direction, so that the drill rod 3 is rolled and transported backward;

[0066] When the infrared probe senses that the drill rod 3 leaves the removal position, the roller frame 4 stops rotating and the drill rod 3 stops moving;

[0067] The liftable flap frame 5 rises, and when the liftable flap frame 5 is higher than the roller frame 4, the drill rod 3 is transferred from the roller frame 4 to the liftable flap frame 5. When the liftable flap frame 5 rises to the same height as the discharge frame 1, the drill rod 3 is rolled from the liftable flap frame 5 to the discharge frame 1.

[0068] Embodiment 2

[0069] like Figure 1 As shown, on the basis of the first embodiment, in order to protect the health of the operators and the environment, a dust suction device 10 can be additionally provided. The dust suction device 10 is preferably provided near the grinding head, and is used to collect dust, rust and sand.

[0070] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A drill pipe joint end face grinding device, characterized in that: It comprises a grinding mechanism, which comprises a core rod, a grinding head and a first motor; the core rod has a cylindrical guide shaft, one end of which is provided with an external thread matching the internal thread of a drill rod; the grinding head is sleeved on the outer wall of the guide shaft, and a grinding layer capable of grinding the end face of a drill rod joint is provided on the end face of the grinding head close to the external thread of the core rod, and the end of the grinding head away from the external thread of the core rod is connected to the first motor, and the first motor is used to drive the grinding head to rotate around the axis of the guide shaft.

2. The drill rod joint end face grinding device according to claim 1, characterized in that: The grinding mechanism also includes an adjusting mechanism, which includes a lifting platform, a transverse slide and a longitudinal slide; the first motor is fixedly mounted on the longitudinal slide, and the output shaft of the first motor extends in a horizontal direction; the longitudinal slide is slidably mounted on the transverse slide, and the longitudinal slide can move in a direction parallel to the output shaft of the first motor; the transverse slide is slidably mounted on the top of the lifting platform, and the transverse slide can move in a horizontal plane in a direction perpendicular to the output shaft of the first motor.

3. The drill rod joint end face grinding device according to claim 2, characterized in that: It also includes a second motor, which is fixedly mounted on the longitudinal drag plate. The output shaft of the second motor is parallel to the output shaft of the first motor. The output shaft of the second motor can form a detachable connection with the other end of the mandrel and drive the mandrel to rotate.

4. The drill rod joint end surface grinding device according to claim 1, characterized in that: It also includes a drill rod positioning and fixing mechanism, which includes at least two groups of centering clamps. The at least two groups of centering clamps are arranged at intervals in a direction parallel to the output shaft of the first motor. The centering clamps are used to clamp and center the drill rod.

5. The drill rod joint end face grinding device according to claim 4, characterized in that: Each set of the centering clamps comprises two clamps and a driving assembly, and the driving assembly is used to drive the two clamps to move closer to or away from each other to achieve clamping or releasing of the drill rod.

6. The drill rod joint end face grinding device according to claim 5, characterized in that: The driving assembly includes a fixed frame, a second cylinder, two guide shafts, a gear, and two racks; the gear is rotatably mounted on the fixed frame via a rotating shaft, the gear is arranged between the two racks and meshes with the two racks respectively, the two racks are parallel to each other and slidably mounted on the fixed frame; the second cylinder is connected to and drives one of the racks to reciprocate along its length direction; the two guide shafts are parallel to the two racks, and the two guide shafts are fixedly mounted on the fixed frame; the two clamps are respectively fixedly mounted on the two racks, and each clamp is slidably connected to the two guide shafts at the same time and can slide along the guide shafts.

7. The drill rod joint end surface grinding device according to claim 1, characterized in that: It also includes a conveying mechanism, which includes at least two roller frames, and the at least two roller frames are arranged at intervals in a direction parallel to the output shaft of the first motor; the two roller frames are used to carry the drill rod, and the rollers on the roller frames can drive the drill rod to reciprocate along its axial direction when rolling.

8. The drill rod joint end surface grinding device according to claim 7, characterized in that: It also includes an induction probe and a controller, wherein the controller is connected to the roller frame and the induction probe respectively; the induction probe is configured to send a signal to the controller when the drill rod enters the grinding position or leaves the removal position; and the controller is configured to control the roller frame to stop running after receiving the signal.

9. The drill rod joint end surface grinding device according to claim 7, characterized in that: The conveying mechanism also includes at least two liftable flip frames, which are arranged at intervals in a direction parallel to the output shaft of the first motor; the liftable flip frame includes a first cylinder and a guide rail, and two single-sided inclined steps are arranged on the top of the guide rail, and the first cylinder is used to connect and drive the guide rail to rise and fall; a feed rack and a discharging rack are respectively arranged on both sides of the liftable flip frame, and the feed rack is arranged on the side of the step inclined upward, and the discharging rack is arranged on the side of the step inclined downward.

10. The drill rod joint end face grinding device according to any one of claims 1 to 9, characterized in that: It also includes at least two liftable roller frames, which are arranged at intervals in a direction parallel to the output shaft of the first motor; each roller frame includes a third cylinder and a roller frame, and the third cylinder is used to drive the roller frame to rise and fall. The two roller frames are used to carry the drill rod, and the rollers on the roller frames can drive the drill rod to rotate along its axis when rolling.

11. The drill rod joint end face grinding device according to any one of claims 1 to 9, characterized in that: A dust suction device is also included, and the dust suction device is used to collect dust, rust and sand particles.

12. The drill rod joint end face grinding device according to any one of claims 1 to 9, characterized in that: The grinding head is connected to the output shaft of the first motor via a spline.

13. The drill rod joint end face grinding device according to any one of claims 1 to 9, characterized in that: The grinding layer is sandpaper pasted on the end surface of the grinding head.

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