Self-control follow-up frame of rotary drilling rig

Abstract

The invention provides a self-control type follow-up frame of a rotary drilling rig. The problems that alignment between a sliding lug and a rail is difficult, safety is poor, and the sliding lug lacks a reliable compensation mechanism are effectively solved. According to the technical scheme, the device comprises a supporting frame, a sliding lug, a slewing bearing and an enclasping unit; each sliding lug comprises a U-shaped plate with an inward opening, movable units are arranged on the three side walls of each U-shaped plate, each movable unit comprises a semicircular shell, rotating shafts coaxial with the semicircular shells are fixed to the two ends of the semicircular shells, the rotating shafts are hinged to the side walls of the U-shaped plates through torsional springs, and wear-resisting plates are installed at the openings of the semicircular shells. The holding unit comprises a swing rod, one end of the swing rod is hinged to the side edge of the supporting frame through a torsional spring, and an arc-shaped plate is fixed to the other end of the swing rod and is coaxial with the slewing bearing. A side rod is fixed to the end, hinged to the supporting frame, of the swing rod, a winding wheel is arranged on the U-shaped plate located on one side of the swing rod, a steel wire rope is connected between the winding wheel and the side rod, and the winding wheel is fixed to the rotating shaft at the end of one semicircular shell.

Description

Technical Field

[0001] This invention relates to the field of rotary drilling rig technology, and in particular to a self-controlled follow-up frame for rotary drilling rigs. Background Technology

[0002] Rotary drilling rigs hold a significant position in the high-end equipment manufacturing industry, widely used in fields such as mining drilling, oil drilling, geological exploration, and building foundation construction. The follower frame, as one of the key working components of a rotary drilling rig, mainly consists of a support frame and its connecting slewing bearing and sliding lugs. During drill rod installation, the follower frame is not rigidly welded to the drill rod; instead, it is fitted onto the upper end of the drill rod via a component called the slewing bearing. The outer ring of the slewing bearing is connected to the drill rod, and the inner ring is connected to the follower frame, allowing the follower frame to rotate freely relative to the drill rod. When the drill rod is hoisted, the follower frame is suspended in mid-air. The operator in the cab can only control the drill rod's up-and-down movement and approximate forward-and-backward position via the main winch, but cannot directly control the rotation angle of the follower frame itself. To align the sliding lugs with the track, subtle movements of the hoist and drill rod, utilizing the follower frame's own gravity and inertia, are required to "sway" it to the precise position. This process itself heavily relies on feel and experience. If weather factors are added, such as windy or strong winds, the difficulty of aligning the sliding lug with the track increases even more.

[0003] Regarding the persistent problems in aligning the sliding lug with the track, although these are common on construction sites, there are some solutions in the industry. For example, patent document CN103696701A proposes to first semi-fix the sliding lug, then adjust the angle of the mast or drill rod, and finally fasten the sliding lug onto the track. Although this method solves the alignment problem, it is seriously inconsistent with industry operating habits, requiring personnel to work at heights and also requiring a platform for working at heights, which has obvious drawbacks. CN111021951A achieves rapid alignment by setting a guide slope at the upper end of the track, but in practice, because the follower frame can swing freely relative to the drill rod, the sliding lug frequently hits the mast and track during the alignment process, making it very difficult to align the sliding lug on the follower frame with the track, resulting in low drill rod installation efficiency. It should be emphasized that during the disassembly of the drill rod, the upper end of the drill rod is suspended in mid-air. At this time, the follower frame vibrates as the winch operates, and the follower frame swings randomly on the drill rod. The faster the winch winds up or unwinds the line, the more obvious the swinging phenomenon of the follower frame becomes, which poses a safety hazard.

[0004] Furthermore, in existing technologies, sliding lugs are usually welded and fixed, with nylon scrapers or wear-resistant plates installed inside. After a period of time, the plates wear down, leading to high noise, low precision, and severe shaking, which can even damage the drill rod. Although patent document CN103696701A mentions using a hydraulically driven contact head to automatically compensate for the gap between the sliding lug and the track, thereby improving stability, this is actually difficult to achieve. This is because the follower frame itself is in a high-frequency vibration state during operation, and it is often not suitable to install a hydraulic station or electric pump. Therefore, compared with existing technologies, the best approach is to replace the wear-resistant plates, but this requires disassembly, resulting in low maintenance efficiency and the inability to make timely adjustments and compensations based on the site conditions.

[0005] To solve the above problems, a self-controlled follower frame for rotary drilling rigs is provided. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a self-controlled follow-up frame for rotary drilling rigs, which effectively solves the problems of difficulty in aligning the sliding lug with the track, poor safety, and lack of reliable compensation mechanism for the sliding lug.

[0007] The technical solution includes a support frame, a sliding lug, a slewing bearing, and a clamping unit. The sliding lug includes an inwardly opening U-shaped plate. Movable units are installed on the three side walls of the U-shaped plate. Each movable unit includes a semi-circular shell with its opening facing the center of the U-shaped plate. A rotating shaft is fixed at both ends of the semi-circular shell and is coaxial with it. The rotating shaft is hinged to the side wall of the U-shaped plate via a torsion spring. A wear-resistant plate is installed at the opening of the semi-circular shell. The three wear-resistant plates in the same U-shaped plate cavity are arranged in a U-shape, and the track can pass through the middle of the three wear-resistant plates. In the initial state, the upper end of the wear-resistant plate is inclined towards the center of the U-shaped plate. When the track is in the middle of the three wear-resistant plates, the track forces the upper ends of the three wear-resistant plates to separate outward, and the wear-resistant plates are in a vertical state. The clamping unit includes a swing arm, one end of which is hinged to the side of the support frame via a torsion spring, and the other end of which is fixed with an arc-shaped plate. The arc-shaped plate is coaxial with the slewing bearing. When the arc-shaped plate clamps the outer ring of the slewing bearing, it can fix the outer ring of the slewing bearing so that it does not rotate. A side rod is fixed to the end of the swing arm that is hinged to the support frame. A winding wheel is on a U-shaped plate on one side of the swing arm. A steel wire rope is connected between the winding wheel and the side rod. The winding wheel is fixed to the shaft at the end of one of the semi-circular shells. As the track gradually passes through the middle of the three wear-resistant plates, the track forces the semi-circular shell on which it is located to rotate through the wear-resistant plates, so that the winding wheel can drive the side rod to rotate through the steel wire rope. Finally, the side rod drives the arc-shaped plate to move away from the slewing bearing through the swing arm. At this point, the outer ring of the slewing bearing returns to a state of free rotation.

[0008] Furthermore, the semi-circular shell contains a screw, which is perpendicular to the wear-resistant plate. The end of the screw away from the wear-resistant plate passes through the side wall of the semi-circular shell, and the screw and the side wall of the semi-circular shell are screwed together by a threaded structure. There is a first connecting rod at both the top and bottom of the screw. The end of the first connecting rod away from the wear-resistant plate gradually approaches the screw and is hinged to the inner side wall of the semi-circular shell. A rectangular slider is installed on the end of the first connecting rod near the wear-resistant plate. A vertical groove is provided on the wear-resistant plate, and the slider can slide in the groove without disengaging from the groove. A cylinder is fitted on the end of the screw near the wear-resistant plate. Two second connecting rods, each corresponding to one of the first connecting rods, are hinged to the cylinder. The ends of the second connecting rods away from the cylinder are hinged to the middle of the first connecting rod. When the screw is screwed, the screw moves the cylinder axially under the action of the thread. The cylinder drives the first connecting rod to swing through the two second connecting rods. The two first connecting rods, through the sliders on them, drive the wear-resistant plate to move closer to or away from the semi-circular shell, thereby compensating for the wear of the wear-resistant plate.

[0009] Furthermore, the slider is a rectangular block with protrusions forming a T-shaped structure, and the slide groove is in the form of a T-groove.

[0010] Furthermore, the slider and the second connecting rod are hinged.

[0011] Furthermore, a cylinder is fixed to one end of the second connecting rod near the wear-resistant plate, and a groove adapted to the cylinder is provided on the surface of the rectangular block, with the cylinder hinged in the groove.

[0012] Furthermore, a flat plate is fixed to the outer side of the semi-circular shell. The flat plate is parallel to the wear-resistant plate. Multiple clamping screws pass through the flat plate and are connected to the flat plate by threads. Multiple blind holes corresponding to the clamping screws are provided on the wear-resistant plate. The multiple screws press against the bottom of their corresponding blind holes, so that the wear-resistant plate is fixed on the semi-circular shell.

[0013] Furthermore, the outer edge of the outer ring of the slewing bearing is provided with multiple slots, and the arc plate is provided with multiple locking blocks that engage with the slots. When the arc plate is coaxial with the slewing bearing, the multiple locking blocks are engaged in the slots, so that the outer ring of the slewing shaft is fixed and does not rotate.

[0014] Furthermore, a vertical clearance groove is provided on the side wall of the U-shaped plate, and the end of the screw away from the wear-resistant plate extends out of the U-shaped plate through the clearance groove.

[0015] Furthermore, a rectangular tube is fixed to one end of the U-shaped frame near the support, and the end of the support frame is inserted into the rectangular tube. The rectangular tube and the support frame are fixed together by multiple fastening pins.

[0016] Furthermore, multiple pads are fixed on one end of the rectangular cavity near the U-shaped plate to prevent the support frame from touching or squeezing the screw at that location.

[0017] Furthermore, the two adjacent semicircular shells are connected by a bevel gear set.

[0018] This invention has a clever structure. By modifying the sliding lug, it can greatly improve the alignment efficiency between the sliding lug and the track. It can fix the follower frame relative to the drill rod when the sliding lug is separated from the track, preventing it from shaking. It can also enable the follower frame to rotate relative to the drill rod after the sliding lug and the track are engaged. This is beneficial for the alignment of the sliding lug and the track, and also helps to ensure construction safety. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention.

[0020] Figure 2 for Figure 1 A perspective view from opposite directions.

[0021] Figure 3 This is the front view of the present invention.

[0022] Figure 4 This is a top view of the present invention.

[0023] Figure 5 This is an exploded view of the present invention.

[0024] Figure 6 This is a top view of the sliding lug in this invention.

[0025] Figure 7 This is a perspective view of the sliding ear in this invention.

[0026] Figure 8 for Figure 7 A perspective view from opposite directions.

[0027] Figure 9 This is a perspective view of the active unit in this invention.

[0028] Figure 10 This is a diagram of the internal structure of the active unit in this invention.

[0029] Figure 11 This is an exploded view of the active unit in this invention.

[0030] Figure 12 This is a diagram showing the state when the arc plate separates from the outer ring of the slewing bearing, provided the track and sliding lug are aligned and engaged.

[0031] Figure 13 for Figure 12 A top-down projection. Detailed Implementation

[0032] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Depend on Figures 1 to 13The present invention includes a support frame 1, a sliding lug 2, a slewing bearing, and a clamping unit; the sliding lug 2 includes a U-shaped plate 3 with an inward opening, and movable units are installed on the three side walls of the U-shaped plate 3. The movable unit includes a semi-circular shell 4 with an opening facing the center of the U-shaped plate 3. The two ends of the semi-circular shell 4 are fixed with a rotating shaft 5 coaxial with it. The rotating shaft 5 is hinged to the side wall of the U-shaped plate 3 via a torsion spring. A wear-resistant plate 6 is installed at the opening of the semi-circular shell 4. The three wear-resistant plates 6 in the same cavity of the U-shaped plate 3 are arranged in a U-shape, and the track can pass through the middle of the three wear-resistant plates 6; in the initial state, the upper end of the wear-resistant plate 6 is inclined towards the center of the U-shaped plate 3. When the track is in the middle of the three wear-resistant plates 6, the track forces the upper ends of the three wear-resistant plates 6 to separate outward, and the wear-resistant plates 6 are in a vertical state; The clamping unit includes a swing rod 7, one end of which is hinged to the side of the support frame 1 via a torsion spring, and the other end of the swing rod 7 is fixed with an arc plate 8. The arc plate 8 is coaxial with the slewing bearing. When the arc plate 8 clamps the outer ring 20 of the slewing bearing, it can fix the outer ring 20 of the slewing bearing and prevent it from rotating. A side rod 9 is fixed to the end of the swing rod 7 that is hinged to the support frame 1. A winding wheel 10 is on the U-shaped plate 3 on one side of the swing rod 7. A wire rope 11 is connected between the winding wheel 10 and the side rod 9. The winding wheel 10 is fixed to the rotating shaft 5 at the end of one of the semi-circular shells 4. When the track gradually passes through the middle of the three wear-resistant plates 6, the track forces the semi-circular shell 4 to rotate through the wear-resistant plates 6, so that the winding wheel 10 can drive the side rod 9 to rotate through the wire rope 11. Finally, the side rod 9 drives the arc plate 8 to move away from the slewing bearing through the swing rod 7, and the outer ring 20 of the slewing bearing returns to a state of free rotation.

[0034] To facilitate the installation and replacement of the wear-resistant plate 6, and to allow for timely adjustments to compensate for wear, a screw 12 is located inside the semi-circular shell 4. The screw 12 is perpendicular to the wear-resistant plate 6, and the end of the screw 12 away from the wear-resistant plate 6 penetrates the side wall of the semi-circular shell 4. The screw 12 and the side wall of the semi-circular shell 4 are screwed together by a threaded structure. A first connecting rod 13 is located above and below the screw 12. The end of the first connecting rod 13 away from the wear-resistant plate 6 gradually approaches the screw 12 and is hinged to the inner side wall of the semi-circular shell 4. A rectangular slider 14 is installed on the end of the first connecting rod 13 near the wear-resistant plate 6. The wear-resistant plate 6 has a vertical groove 15, allowing the slider 14 to... The slide 14 slides within the groove 15 without disengaging from the groove 15. A cylinder 16 is fitted onto the end of the screw 12 closest to the wear-resistant plate 6. Two second connecting rods 17, corresponding one-to-one with the first connecting rod 13, are hinged to the cylinder 16. The end of the second connecting rod 17 away from the cylinder 16 is hinged to the middle of the first connecting rod 13. When the screw 12 is turned, the screw 12 moves the cylinder 16 axially under the action of the thread. The cylinder 16 drives the first connecting rod 13 to swing through the two second connecting rods 17. The two first connecting rods 13 drive the wear-resistant plate 6 to move closer to or away from the semi-circular shell 4 through the slider 14 on them, thereby compensating for the wear of the wear-resistant plate 6.

[0035] In order to prevent the slider 14 from disengaging from the slide groove 15, the slider 14 is a rectangular block with protrusions forming a T-shaped structure, and the slide groove 15 is in the form of a T-shaped groove.

[0036] To ensure a stable surface contact between the slider 14 and the wear-resistant plate 6, the slider 14 and the second connecting rod 17 are hinged.

[0037] In order to better support the wear-resistant plate 6, a cylinder 18 is fixed on one end of the second connecting rod 17 near the wear-resistant plate 6. A groove adapted to the cylinder 18 is provided on the surface of the rectangular block, and the cylinder 18 is hinged in the groove.

[0038] To prevent the wear-resistant plate 6 from slipping or shifting during operation, a flat plate is fixed to the outer side of the semi-circular shell 4. The flat plate is parallel to the wear-resistant plate 6, and multiple clamping screws 19 pass through the flat plate. The clamping screws 19 are threadedly connected to the flat plate. The wear-resistant plate 6 is provided with multiple blind holes that correspond one-to-one with the clamping screws 19. The multiple screws press against the bottom of their corresponding blind holes, so that the wear-resistant plate 6 is fixed on the semi-circular shell 4 and does not move.

[0039] In order to ensure that the arc plate 8 can hold and fix the outer ring 20 of the slewing bearing tightly, multiple slots 21 are provided on the outer edge of the outer ring 20 of the slewing bearing, and multiple locking blocks 22 that cooperate with the slots 21 are provided on the arc plate 8. When the arc plate 8 and the slewing bearing are coaxial, the multiple locking blocks 22 are locked into the slots 21, so that the outer ring 20 of the slewing shaft 5 is fixed and does not rotate.

[0040] To facilitate the screw 12 and thus the adjustment of the compensation amount, a vertical relief groove 23 is provided on the side wall of the U-shaped plate 3, and the end of the screw 12 away from the wear-resistant plate 6 extends out of the U-shaped plate 3 through the relief groove 23.

[0041] In order to fix the sliding lug 2 to the support frame 1, a rectangular tube 24 is fixed on one end of the U-shaped frame near the bracket. The end of the support frame 1 is inserted into the rectangular tube 24, and the rectangular tube 24 and the support frame 1 are fixed together by multiple fastening pins.

[0042] Multiple pads 25 are fixed on one end of the rectangular tube 24 near the U-shaped plate 3 to prevent the support frame 1 from touching or squeezing the screw 12 there.

[0043] To maintain the coordination of the semicircular shells 4 on the same U-shaped frame, adjacent semicircular shells 4 are driven by a bevel gear set.

[0044] It is worth noting that in this design, the position of the wear-resistant plate 6 can be adjusted by turning the screw 12, thereby compensating for the wear of the wear-resistant plate 6. Hooks or loops are provided on the side plates and the ends of the wire rope 11 to facilitate the disassembly or connection between the wire rope 11 and the side plates.

[0045] In use, the drill rod is fixed to the outer ring 20 of the slewing bearing with multiple fasteners, just as in the traditional method. Initially, since the multiple wear-resistant plates 6 are not yet in contact with the rails on the mast, ... Figures 1 to 4 As shown, the upper parts of multiple wear-resistant plates 6 are inclined towards the middle. At this time, under the action of the torsion spring, the swing arm 7 causes the arc-shaped plate 8 to hug the outer ring 20 of the slewing bearing, and the outer ring 20 of the slewing bearing cannot rotate freely. When the follower frame and the drill rod are lifted upward by the winch, because the upper ends of multiple wear-resistant plates 6 are close together to the middle, forming a structure similar to a trumpet, the upper end of the track is easier to aim, greatly reducing the difficulty of aligning the track and the sliding lug 2. At the same time, since the drill rod and the follower frame are fixedly connected before the track contacts the wear-resistant plates 6, the probability of swaying of the follower frame is greatly reduced after lifting, further reducing the difficulty of aligning the track and the sliding lug 2.

[0046] When the sliding lug 2 is aligned and engaged with the track, the track passes through the middle of the three wear-resistant plates 6. The track forces the wear-resistant plates 6 to be vertical. During this process, the semi-circular shell 4 rotates, and the winding wheel 10 is driven to rotate by the corresponding semi-circular shell 4. The winding wheel 10 winds up the wire rope 11, and the wire rope 11 drives the swing arm 7 to rotate around the hinge point via the side plate. When the swing arm 7 rotates, it drives the arc plate 8 to gradually separate from the outer ring 20 of the slewing bearing. When the arc plate 8 is completely separated from the outer ring 20 of the slewing bearing, the outer ring 20 can rotate freely relative to the follower frame, which means that the drill rod can perform drilling operations.

[0047] After a period of time, the wear-resistant plate 6 will wear and become thinner. At this time, it is necessary to adjust the wear-resistant plate 6 to move away from the semi-circular shell 4. Specifically, screws 12 inside each semi-circular shell 4 are screwed. The screws 12 are connected to the side wall of the semi-circular shell 4 by threads, so the screws 12 will also move along the axial direction inside the cavity of the semi-circular shell 4 while rotating. There is a cylinder 16 at the end of the screw 12. The cylinder 16 drives the first connecting rod 13 to swing through the second connecting rod 17, which causes the two sliders 14 to gradually move closer to the middle, and finally move the wear-resistant plate 6 away from the semi-circular shell 4. Finally, tighten the clamping screws 19. Multiple clamping screws 19 press against the pressure plate to provide it with sufficient support.

[0048] In terms of fixing the wear-resistant plate 6 in this invention, the slider 14 mainly undertakes positioning and guiding to ensure the positional accuracy of the wear-resistant plate 6 relative to the semi-circular shell 4, and the clamping screw 19 mainly undertakes to overcome the cutting force and prevent the wear-resistant plate 6 from tilting up or down due to frictional resistance.

[0049] In this invention, the initial flared structure provides a large margin of error for track entry, significantly reducing the difficulty of high-altitude alignment, minimizing auxiliary time, and improving operational efficiency. Before the track contacts the wear-resistant plate 6, the clamping unit remains locked, making the follower frame and drill rod a rigid unit, effectively suppressing torsional swaying during lifting. This improves the ease of alignment and reduces the risk of equipment damage from impacts.

[0050] The wear-resistant plate 6 compensation mechanism in this invention does not require disassembling the sliding lug 2. The extension amount can be adjusted simply by externally turning the screw 12. Furthermore, the linkage mechanism ensures the parallelism of the wear-resistant plate 6 during movement, maintains good surface contact with the track, avoids impact loads caused by excessive gaps, and extends the service life of the wear-resistant plate 6 and the track.

[0051] In the process of aligning the sliding lug 2 with the track, the winding wheel 10 rotates, which in turn causes the clamping unit to relax the restriction on the outer ring 20 of the slewing bearing, allowing the drill rod on the outer ring 20 to rotate freely relative to the follower frame. At this time, the drill rod can perform normal rotary drilling operations.

[0052] Similarly, when disassembling the drill rod, the wear-resistant plate 6 detaches from the track. At this time, the semi-circular shell 4 returns to its initial state under the action of the torsion spring. The reel 10 then prevents the wire rope 11 from loosening. Under the action of the torsion spring on the clamping unit, the swing arm 7 causes the arc plate 8 to clamp the outer ring 20 of the slewing bearing again. Thus, a rigid connection is formed between the drill rod and the follower frame again, preventing the follower frame from swaying during the lowering of the drill rod, which is beneficial for safe construction. The transmission to the clamping unit is achieved through the wire rope 11 and the reel 10, which has high reliability and is particularly suitable for the harsh construction environment of rotary drilling rigs.

[0053] The invention has a clever structure. By modifying the sliding lug 2, the alignment efficiency between the sliding lug 2 and the track can be greatly improved. When the sliding lug 2 is separated from the track, the follower frame can be fixed relative to the drill rod to avoid swaying. It also allows the follower frame to rotate relative to the drill rod after the sliding lug 2 is engaged with the track. This is beneficial for the alignment of the sliding lug 2 and the track, and also helps to ensure construction safety.

Claims

1. A self-controlled follow-up frame for a rotary drilling rig, characterized in that, Includes a support frame (1), a sliding lug (2), a slewing bearing, and a clamping unit; the sliding lug (2) includes a U-shaped plate (3) with an inward opening, and movable units are installed on the three side walls of the U-shaped plate (3). The movable unit includes a semi-circular shell (4) with an opening facing the center of the U-shaped plate (3). The two ends of the semi-circular shell (4) are fixed with a rotating shaft (5) coaxial with it. The rotating shaft (5) is hinged to the side wall of the U-shaped plate (3) by a torsion spring. A wear-resistant plate (6) is installed at the opening of the semi-circular shell (4). The three wear-resistant plates (6) in the same U-shaped plate (3) cavity are arranged in a U-shape, and the track can pass through the middle of the three wear-resistant plates (6). In the initial state, the upper end of the wear-resistant plate (6) is inclined towards the center of the U-shaped plate (3). When the track is in the middle of the three wear-resistant plates (6), the track forces the upper ends of the three wear-resistant plates (6) to separate outward, and the wear-resistant plates (6) are in a vertical state. The clamping unit includes a swing rod (7), one end of which is hinged to the side of the support frame (1) via a torsion spring, and the other end of which is fixed with an arc plate (8). The arc plate (8) is coaxial with the slewing bearing. When the arc plate (8) clamps the outer ring (20) of the slewing bearing, it can fix the outer ring (20) of the slewing bearing so that it does not rotate. A side rod (9) is fixed on the end of the swing rod (7) that is hinged to the support frame (1). A winding wheel (10) is on a U-shaped plate (3) on one side of the swing rod (7). The winding wheel (10) and the side rod (9) are connected to each other. 9) are connected by a steel wire rope (11), and the winding wheel (10) is fixed together with the shaft (5) at the end of one of the semicircular shells (4). When the track gradually passes through the middle of the three wear-resistant plates (6), the track forces the semicircular shell (4) where it is located to rotate through the wear-resistant plate (6), so that the winding wheel (10) can drive the side rod (9) to rotate through the steel wire rope (11). Finally, the side rod (9) drives the arc plate (8) to move away from the slewing bearing through the swing rod (7). At this point, the outer ring (20) of the slewing bearing returns to a free rotation state.

2. The self-controlled follow-up frame for a rotary drilling rig according to claim 1, characterized in that, The semi-circular shell (4) contains a screw (12), which is perpendicular to the wear-resistant plate (6). The end of the screw (12) away from the wear-resistant plate (6) passes through the side wall of the semi-circular shell (4), and the screw (12) and the side wall of the semi-circular shell (4) are screwed together by a threaded structure. There is a first connecting rod (13) above and below the screw (12). The end of the first connecting rod (13) away from the wear-resistant plate (6) gradually approaches the screw (12) and is hinged to the inner side wall of the semi-circular shell (4). A rectangular slider (14) is installed on the end of the first connecting rod (13) near the wear-resistant plate (6). A vertical groove (15) is provided on the wear-resistant plate (6), and the slider (14) can slide in the groove (15). The slider (14) and the wear-resistant plate (6) are connected to the wear-resistant plate (6). The slide (15) does not disengage. A cylinder (16) is fitted on the end of the screw (12) near the wear plate (6). Two second connecting rods (17) corresponding to the first connecting rod (13) are hinged on the cylinder (16). The end of the second connecting rod (17) away from the cylinder (16) is hinged to the middle of the first connecting rod (13). When the screw (12) is turned, the screw (12) moves the cylinder (16) axially under the action of the thread. The cylinder (16) drives the first connecting rod (13) to swing through the two second connecting rods (17). The two first connecting rods (13) drive the wear plate (6) to move closer to or away from the semi-circular shell (4) through the slider (14) on them, thereby realizing the compensation for the wear of the wear plate (6).

3. The self-controlled follow-up frame for a rotary drilling rig according to claim 2, characterized in that, The slider (14) is a rectangular block with protrusions forming a T-shaped structure, and the groove (15) is in the form of a T-shaped groove.

4. A self-controlled follow-up frame for a rotary drilling rig according to claim 2 or 3, characterized in that, The slider (14) and the second connecting rod (17) are hinged.

5. The self-controlled follow-up frame for a rotary drilling rig according to claim 4, characterized in that, The second connecting rod (17) has a cylinder (18) fixed at one end near the wear-resistant plate (6). A groove adapted to the cylinder (18) is provided on the surface of the rectangular block, and the cylinder (18) is hinged in the groove.

6. The self-controlled follow-up frame for a rotary drilling rig according to claim 2, characterized in that, A flat plate is fixed on the outside of the semi-circular shell (4). The flat plate is parallel to the wear-resistant plate (6). Multiple clamping screws (19) pass through the flat plate. The clamping screws (19) are connected to the flat plate by threads. Multiple blind holes corresponding to the clamping screws (19) are provided on the wear-resistant plate (6). Multiple screws press against the bottom of their corresponding blind holes so that the wear-resistant plate (6) is fixed on the semi-circular shell (4) and does not move.

7. The self-controlled follow-up frame for a rotary drilling rig according to claim 1, characterized in that, The outer edge of the outer ring (20) of the slewing bearing is provided with multiple slots (21), and the arc plate (8) is provided with multiple locking blocks (22) that cooperate with the slots (21). When the arc plate (8) and the slewing bearing are coaxial, the multiple locking blocks (22) are locked into the slots (21), so that the outer ring (20) of the slewing shaft (5) is fixed and does not rotate.

8. The self-controlled follow-up frame for a rotary drilling rig according to claim 2, characterized in that, The side wall of the U-shaped plate (3) is provided with a vertical relief groove (23), and the end of the screw (12) away from the wear-resistant plate (6) extends out of the U-shaped plate (3) through the relief groove (23).

9. The self-controlled follow-up frame for a rotary drilling rig according to claim 1, characterized in that, A rectangular tube (24) is fixed on one end of the U-shaped frame near the support. The end of the support frame (1) is inserted into the rectangular tube (24). The rectangular tube (24) and the support frame (1) are fixed together by multiple fastening pins.

10. A self-controlled follow-up frame for a rotary drilling rig according to claim 9, characterized in that, Multiple pads (25) are fixed on one end of the rectangular tube (24) near the U-shaped plate (3) to prevent the support frame (1) from touching or squeezing the screw (12) there.

Images