A rotary drilling rig

Abstract

The present invention discloses a rotary drilling rig, which belongs to the technical field of drilling rigs. It mainly comprises a rotary drilling body, a power head is slidably mounted on the rotary drilling body, a first-level drill rod is slidably mounted on the power head, a second-level drill rod is slidably mounted inside the first-level drill rod, a rotation groove is fixedly provided on the upper side wall of the second-level drill rod, a limited locking mechanism is slidably connected on the rotation groove, a third-level drill rod is slidably mounted inside the second-level drill rod, a limited mechanism is fixedly mounted on the upper side wall of the third-level drill rod, a top cover is fixedly connected to the bottom of the third-level drill rod, a left cylinder wall and a right cylinder wall are rotatably connected to the top cover, a drill disc is rotatably connected to the bottom of the right cylinder wall, and the drill disc cooperates with the left cylinder wall. The present invention sets a left cylinder wall, a right cylinder wall and a drill disc, and when it is necessary to discharge the soil, it only needs to lift the top cover to make the pressure rod hit the bottom of the power head, and the left cylinder wall, the right cylinder wall and the drill disc can all be unlocked and opened, and the soil therein can be quickly discharged, thereby improving the soil unloading speed. The present invention is mainly used for hole-forming operations.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling rigs, and in particular relates to a rotary drilling rig. Background Art

[0002] As a construction machine suitable for drilling operations in building foundation projects, rotary drilling rigs are widely used in drilling operations in foundation construction projects such as municipal construction, highway bridges, and high-rise buildings. The principle is that the power head drives the drill rod to realize the rotation of the drill bit to cut rock and soil, excavate soil and slurry, and then lift it out of the hole to unload the soil, and perform periodic cycle operations until the hole is completed.

[0003] A Chinese patent with publication number "CN219864865U" discloses a drill bit for a rotary drilling rig, including a drill bit body, a mounting head fixed on the top of the drill bit body, a triangular reinforcing rib fixed on the surface of the mounting head, a partition fixed on the upper end of the inner part of the drill bit body, a rotating column rotating in the middle of the partition, a first bottom plate movably connected to the bottom of the drill bit body, and a second bottom plate movably connected to one end of the drill bit body corresponding to the first bottom plate. The soil and mud inside the drill bit are discharged through a scraper strip, so that the drill bit can quickly proceed to the drilling work without manual cleaning.

[0004] During the later use, the device still had the following problems: although with the help of the scraper bar, the soil and mud can be more completely cleaned out of the drill bit, the cleaning speed is not high due to the limited opening area at the bottom of the drill bit. It takes a long time to completely clean the soil, and the cleaning speed still needs to be further improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the prior art and provide a rotary drilling rig, which, by setting a left cylinder wall, a right cylinder wall and a drill disc, when it is necessary to unload the soil and slurry, it is only necessary to lift the top cover to make the pressure rod hit the bottom of the power head, and the left cylinder wall, the right cylinder wall and the drill disc can all be unlocked and opened, so that the soil and slurry therein can be quickly discharged, thereby greatly improving the unloading speed.

[0006] The rotary drilling rig comprises a rotary drilling body, a power head is slidably mounted on the rotary drilling body, a first-level drill rod is slidably mounted on the power head, the outer wall of the first-level drill rod is fixedly connected to a limited sliding bar, a limited sliding groove and a slot are fixedly provided on the inner wall of the first-level drill rod, a guide wedge is fixedly provided at the bottom of the slot, a card slot is fixedly provided on the guide wedge in the horizontal direction, a guide limiting tooth is fixedly connected on the slot, a second-level drill rod is slidably mounted inside the first-level drill rod, a rotating groove is fixedly provided on the upper side wall of the second-level drill rod, and a limited sliding groove is slidably connected on the rotating groove A locking mechanism, a third-stage drill rod is slidably installed inside the second-stage drill rod, a limiting mechanism is fixedly installed on the upper side wall of the third-stage drill rod, a fixed clamp is fixedly connected to the upper inner wall of the third-stage drill rod, an extrusion lifting rod is arranged inside the third-stage drill rod, the limiting locking mechanism and the limiting mechanism are both matched with the extrusion lifting rod, a pull rope is fixedly connected to the top of the extrusion lifting rod, and the other end of the pull rope is fixedly connected to the rotary drilling body, a top cover is fixedly connected to the bottom of the third-stage drill rod, a left cylinder wall and a right cylinder wall are rotatably connected to the top cover, a drill disc is rotatably connected to the bottom of the right cylinder wall, and the drill disc is matched with the left cylinder wall.

[0007] Preferably, the outer wall of the secondary drill pipe is fixedly connected with a limiting slide bar 2, and the limiting slide bar 2 is slidably connected to the limiting slide groove 1. A limiting slide groove 2 and a slot 2 are fixedly provided on the inner wall of the secondary drill pipe, and the slot 2 is fixedly connected with a guide limiting tooth 2. A limiting slide bar 3 is fixedly connected to the outer wall of the tertiary drill pipe, and the limiting slide bar 3 is slidably connected to the limiting slide groove 2. A locking groove is also provided on the upper side wall of the tertiary drill pipe, and the locking groove includes a vertical groove, which cooperates with the slot 1. A guide wedge block 2 is fixedly installed at the bottom of the vertical groove, and the guide wedge block 2 is laterally fixed with a slot 2, which cooperates with the slot 1.

[0008] Preferably, the limit locking mechanism includes a rotating block, which is slidably connected to the rotating groove, and the front and rear of the rotating block are rotatably connected with rotating rings, the rotating ring at the front of the rotating block cooperates with the guide wedge block 1, and the rotating ring at the rear of the rotating block cooperates with the guide wedge block 2. An inner cavity 1 is fixedly opened inside the rotating block, and sliding cavities 1 are fixedly opened on both sides of the inner cavity 1. The sliding cavity 1 is slidably connected with a sliding lock 1, and a fixed retaining ring 1 is fixedly connected to the outer wall of the sliding lock 1. The fixed retaining ring 1 cooperates with the inner cavity 1, and the front of the fixed retaining ring 1 A compression spring is fixedly connected, and the other end of the compression spring is fixedly connected to an inner cavity. A slideway is fixedly provided inside the sliding lock, and a limiting groove is fixedly provided on one side wall of the slideway. A lock head is slidably connected inside the slideway, and a clamping block is fixedly connected to both sides of the rear of the lock head, and the clamping block cooperates with the limiting groove. A compression spring is fixedly connected to the rear of the lock head, and the other end of the compression spring is fixedly connected to the bottom of the slideway. The lock head cooperates with a guide limiting tooth, and the rear of the sliding lock cooperates with an extrusion lifting rod.

[0009] Preferably, the limiting mechanism includes a shell, an inner cavity 2 is fixedly opened in the shell, two sliding cavities are fixedly opened at both ends of the inner cavity 2, a sliding lock 2 is slidably connected to the sliding cavity 2, a fixed baffle ring 2 is fixedly connected to the outer wall of the sliding lock 2, the fixed baffle ring 2 cooperates with the inner cavity 2, a compression spring 3 is fixedly connected to the fixed baffle ring 2, the other end of the compression spring 3 is fixedly connected to the inner cavity 2, a slideway 2 is fixedly opened inside the sliding lock 2, a limiting groove 2 is fixedly opened on the side wall of the slideway 2, a lock head 2 is slidably connected to the slideway 2, a clamping block 2 is fixedly connected on the side wall of the lock head 2, the clamping block 2 cooperates with the limiting groove 2, a compression spring 4 is fixedly connected to the rear of the lock head 2, the other end of the compression spring 4 is fixedly connected to the bottom of the slideway 2, the lock head 2 cooperates with the guide limiting tooth 2, and the rear of the sliding lock 2 cooperates with the extrusion lifting rod.

[0010] Preferably, the extrusion lifting rod includes an extrusion block, which is slidably connected to the inner wall of the third-level drill pipe. A pull block is fixedly connected to the bottom of the extrusion block, and the pull block extends downward to the bottom of the fixed clamping ring. A tension spring 1 is also fixedly connected to the bottom of the extrusion block, and the other end of the tension spring 1 is fixedly connected to the top of the fixed clamping ring.

[0011] Preferably, a rotating shaft is fixedly connected to the middle of the top cover, a pressure rod is slidably connected to the top cover, a compression spring five is fixedly connected to the top of the pressure rod, the bottom of the compression spring five is fixedly connected to the top cover, and an extrusion top block is fixedly connected to the bottom of the pressure rod.

[0012] Preferably, a rotating hole 2 is fixedly provided at the outer end of the top of the right cylinder wall, and the rotating hole 2 is rotatably connected to the rotating shaft. A side notch is fixedly provided on the right cylinder wall, and mounting grooves are fixedly provided at both ends of the side notch. An extrusion ring is slidably connected in the side notch, and locking rods are fixedly connected at both ends of the extrusion ring. The locking rod is slidably connected to the mounting groove, and a compression spring 7 is fixedly connected to the bottom of the locking rod, and the other end of the compression spring 7 is fixedly connected to the bottom of the mounting groove. An extrusion wedge block 2 is fixedly connected to the middle of the extrusion ring, and the extrusion wedge block 2 cooperates with the extrusion top block. A fixing block is fixedly connected to the inner wall of the bottom of the right cylinder wall.

[0013] Preferably, the left cylinder wall top outer side is fixedly provided with a rotating hole 1, the rotating hole 1 is rotatably connected with the rotating shaft, the left cylinder wall middle side wall is fixedly connected with a locking hook, the locking hook cooperates with the locking rod, the left cylinder wall lower part is fixedly provided with a sliding groove, the side wall of the sliding groove is fixedly provided with a limiting groove 3, the sliding groove is slidably connected with a locking block, both sides of the locking block are fixedly connected with a convex plate, the convex plate cooperates with the limiting groove 3, the convex plate is fixedly connected with a compression spring 6, the other end of the compression spring 6 is fixedly connected with the side wall of the limiting groove 3, the front of the locking block is fixedly provided with an extrusion head 1, the top of the lock block is fixedly connected with an extrusion head 2, the inner wall of the left cylinder wall is slidably connected, the bottom of the extrusion slide rod cooperates with the extrusion head 2, the upper part of the extrusion slide rod is fixedly provided with an extrusion wedge block 1, the extrusion wedge block 1 cooperates with the extrusion top block, the top of the extrusion wedge block is fixedly connected with a tension spring 2, the other end of the tension spring 2 is fixedly connected to the left cylinder wall, and the fixed block is fixedly connected to the inner wall of the bottom of the left cylinder wall.

[0014] Preferably, the drill disc includes a mounting disc, one side of the mounting disc is fixedly connected with a swivel seat, the swivel seat is rotatably connected to the bottom of the right cylinder wall, the top of the other side of the mounting disc is fixedly connected with a bayonet, the bayonet cooperates with an extrusion head, a plurality of groups of fixed grooves are fixedly provided on the side wall of the mounting disc, the fixed grooves cooperate with fixed blocks, a turntable is rotatably connected to the center of the mounting disc, a plurality of groups of cutting heads are fixedly connected to the bottom of the turntable, a protrusion is fixedly connected to the top of the turntable, and the protrusion cooperates with the mounting disc.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting the limit locking mechanism and the limit mechanism, when the secondary drill rod is placed at the bottom of the primary drill rod, the limit locking mechanism automatically locks the relative axial position of the primary drill rod and the secondary drill rod, and simultaneously unlocks the axial position fixation between the secondary drill rod and the tertiary drill rod, allowing the tertiary drill rod to detach from the secondary drill rod and continue to extend downward, ensuring that the drill bit extends downward for a longer distance. When lifting, after the tertiary drill rod reaches the top of the secondary drill rod, the limit locking mechanism axially locks the tertiary drill rod and the secondary drill rod, and simultaneously releases the locking state between the secondary drill rod and the tertiary drill rod, allowing the secondary drill rod and the tertiary drill rod to continue to move upward. There is no need to frequently rotate the power head to perform complicated locking and unlocking operations on the drill rods at each level, and the lifting process is smoother and faster; 2. By setting the left cylinder wall, the right cylinder wall and the drill disc, when the soil and slurry need to be unloaded, you only need to lift the top cover to make the pressure rod hit the bottom of the power head, and the left cylinder wall, the right cylinder wall and the drill disc can all be unlocked and opened to quickly discharge the soil and slurry, greatly improving the unloading speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention when the drill rod is retracted; Figure 2 This is a schematic diagram of the overall structure of the present invention when the drill rod is unfolded; Figure 3 It is the structural schematic diagram of the power head; Figure 4 It is a schematic diagram of the internal structure of a multi-stage drill pipe; Figure 5 Schematic diagram of the internal structure of the first-level drill pipe; Figure 6 This is a schematic diagram of the internal structure of the bottom end of the first-stage drill pipe; Figure 7 It is the overall structural schematic diagram of the secondary drill pipe; Figure 8 It is a schematic diagram of the internal structure of the top of the secondary drill pipe; Fig. 9 It is a schematic diagram of the overall structure of the limit locking mechanism; Fig.10 Schematic diagram of the internal structure of the limit locking mechanism; Fig.11 Schematic diagram of the internal structure of the slide lock 1; Fig.12 It is a schematic diagram of the structural explosion of the slide lock 1 and the lock head 1; Fig.13 It is a schematic diagram of the top structure of the three-stage drill pipe; Fig.14 It is a schematic diagram of the internal structure of the top of the third-stage drill pipe; Fig.15 is a schematic diagram of the internal structure of the slide lock 2; Fig.16 It is a schematic diagram of the structural explosion of the sliding lock 2 and the lock head 2; Fig.17 It is a schematic diagram of the internal structure of each level of drill rod and extrusion lifting rod; Fig.18 Schematic diagram of the top structure of the drill bit; Fig.19 It is a structural schematic diagram of the drill bit in the unfolded state; Fig. 20 is a schematic diagram of the structure of the top cover; Fig.21 Schematic diagram of the internal structure of the drill bit Fig. 22 It is a partial structural schematic diagram of the right cylinder wall; Fig.23 This is a schematic diagram of the explosion structure of the drill plate; Fig.24 It is a partial structural schematic diagram of the left cylinder wall; Fig.25 This is the structural explosion diagram of the bottom end of the left cylinder wall.

[0017] In the figure, 1, rotary drilling body; 2, extrusion lifting rod; 201, pull block; 202, extrusion block; 203, tension spring 1; 3, power head; 4, primary drill rod; 401, limit slide bar 1; 402, limit slide groove 1; 403, slot 1; 403A, guide limit tooth 1; 403B, slot 1; 403C, guide wedge block 1; 5, secondary drill rod; 501, limit slide bar 2; 502, rotating slot; 503, limit slide groove 2; 504, slot 2; 504A, guide limit tooth 2; 6, limit locking mechanism; 601, rotating block; 601A, inner Cavity 1; 601B, sliding cavity 1; 602, sliding lock 1; 602A, fixed stop ring 1; 602B, compression spring 1; 602C, slideway 1; 602D, limit groove 1; 603, lock head 1; 603A, block 1; 603B, compression spring 2; 604, swivel; 7, three-stage drill rod; 701, limit slide 3; 702, lock groove; 702A, vertical groove; 702B, guide wedge 2; 702C, card slot 2; 703, fixed snap ring; 8, limit mechanism; 801, shell; 801A, inner cavity 2; 801B, sliding cavity 2; 802, sliding Lock 2; 802A, fixed stop ring 2; 802B, compression spring 3; 802C, slide 2; 802D, limit groove 2; 803, lock head 2; 803A, block 2; 803B, compression spring 4; 9, top cover; 901, shaft; 902, pressure rod; 902A, extrusion top block; 903, compression spring 5; 10, left cylinder wall; 1001, rotating hole 1; 1002, lock hook; 1003, extrusion slide rod; 1003A, extrusion wedge block 1; 1003B, tension spring 2; 1004, slide; 1004A, limit groove 3; 1005, lock block; 1 005A, extrusion head one; 1005B, extrusion head two; 1005C, convex plate; 1005D, compression spring six; 11, drill disc; 1101, mounting disc; 1101A, swivel seat; 1101B, fixing groove; 1101C, bayonet; 1102, turntable; 1102A, convex block; 1102B, cutting head; 12, right cylinder wall; 1201, rotating hole two; 1202, side notch; 1203, mounting groove; 1204, extrusion ring; 1204A, extrusion wedge block two; 1204B, locking rod; 1205, compression spring seven; 13, fixing block. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings: The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a rotary drilling rig comprises a rotary drilling body 1, on which a power head 3 is slidably mounted. The rotary drilling body 1 and the power head 3 are both prior art, and can provide torque for a primary drill rod 4, which is finally transmitted to a drill disc 11 at the bottom of the drill bit through a secondary drill rod 5 and a tertiary drill rod 7, thereby performing a cutting operation on the bottom of the hole; the power head 3 directly drives the primary drill rod 4, and the primary drill rod 4 once again drives the secondary drill rod 5 and the tertiary drill rod 7 to rotate, so that the drill bit cuts the formation; the power head 3 is slidably mounted with a primary drill rod 4, as shown in FIG. Figure 5 and Figure 6 As shown, the outer wall of the first-level drill rod 4 is fixedly connected to a limited sliding strip 401, and the limited sliding strip 401 cooperates with the power head 3 to transmit the power of the power head 3 to the first-level drill rod 4; a limited sliding groove 402 and a slot 403 are fixedly provided on the inner wall of the first-level drill rod 4, a guide wedge 403C is fixedly provided at the bottom of the slot 403, and a slot 403B is fixedly provided on the guide wedge 403C in the horizontal direction, and a guide limiting tooth 403A is fixedly connected to the slot 403, and the guide limiting tooth 403A is located at the innermost side of the slot 403; a second-level drill rod 5 is slidably installed inside the first-level drill rod 4, and a rotating groove 502 is fixedly provided on the upper side wall of the second-level drill rod 5, and a limited locking mechanism 6 is slidably connected to the rotating groove 502, and the limiting locking mechanism 6 and the limiting locking mechanism 6 are set. When the secondary drill rod 5 is placed at the bottom of the primary drill rod 4, the limit locking mechanism 6 automatically locks the relative axial position of the primary drill rod 4 and the secondary drill rod 5, and simultaneously unlocks the axial position fixation between the secondary drill rod 5 and the tertiary drill rod 7, allowing the tertiary drill rod 7 to break away from the secondary drill rod 5 and continue to extend downward, ensuring that the drill bit extends a longer distance downward. When lifting, after the tertiary drill rod 7 reaches the top of the secondary drill rod 5, the limit locking mechanism 6 axially locks the tertiary drill rod 7 and the secondary drill rod 5, and simultaneously releases the locking state between the secondary drill rod 5 and the tertiary drill rod 7, allowing the secondary drill rod 5 and the tertiary drill rod 7 to continue to move upward. There is no need to frequently rotate the power head 3 to perform complicated locking and unlocking operations on the drill rods at each level, and the lifting process is smoother and faster.

[0020] When the extrusion lifting rod 2 does not apply an upward force to the drill rods at each level, the limit locking mechanism 6 and the limit mechanism 8 will limit the contraction of the drill rods at each level, but allow the drill rods at each level to expand. When the extrusion lifting rod 2 exerts an upward pulling force on the drill rods at each level, the limit locking mechanism 6 and the limit mechanism 8 do not impose any restrictions on the axial displacement of the drill rods at each level, allowing them to move freely. Therefore, when the drill bit is lowered to the bottom of the hole, the drill rods at each level can quickly slide down to the bottom of the hole under the action of gravity. After contacting the bottom of the hole, no matter what position the drill rods at each level are in, the power head 3 can immediately apply downward pressure to the drill bit, allowing the drill bit to quickly enter the cutting state. When the drill bit is filled with mud and the drill bit is lifted, the drill rods at each level can also be quickly retracted, which greatly saves the process time of lowering the drill rods and lifting the drill rods, and improves work efficiency.

[0021] In the prior art, the process of lifting and lowering drill rods at each level is very complicated and tedious, requiring the operator to have rich experience. First, the drill rod is controlled to lower the drill rods at each level in the order of large diameter first and small diameter later. When the drill bit falls to the bottom of the hole, the power head 3 is rotated to lock the drill rods at each level to facilitate the downward pressure. When the inside of the drill bit is full of soil, the drill rod needs to be controlled to unlock and lift the drill rods at each level in the order of small diameter first and large diameter later. When any level of drill rod is unlocked unsuccessfully, it is necessary to lower the drill rods at each level again, readjust the posture and lift them again. Unlocking requires controlling the drill rod to lift while controlling the rotation of the power head 3 to unlock the adjacent levels of drill rods so as to continue to lift the remaining drill rods until the drill rod is fully retracted, unload the soil inside the drill bit, and repeat the operation again, making the hole-making operation very slow.

[0022] A tertiary drill rod 7 is slidably installed inside the secondary drill rod 5, a limiting mechanism 8 is fixedly installed on the upper side wall of the tertiary drill rod 7, a fixed clamping ring 703 is fixedly connected to the upper inner wall of the tertiary drill rod 7, an extrusion lifting rod 2 is arranged inside the tertiary drill rod 7, the limiting locking mechanism 6 and the limiting mechanism 8 are matched with the extrusion lifting rod 2, a pull rope is fixedly connected to the top of the extrusion lifting rod 2, and the other end of the pull rope is fixedly connected to the rotary drilling body 1, and the rotary drilling body 1 can pull the pull rope to pull the extrusion lifting rod 2 upward; a top cover 9 is fixedly connected to the bottom of the tertiary drill rod 7, such as Fig.18As shown, the top cover 9 is rotatably connected with the left cylinder wall 10 and the right cylinder wall 12, and the bottom of the right cylinder wall 12 is rotatably connected with the drill disc 11, and the drill disc 11 cooperates with the left cylinder wall 10. By setting the left cylinder wall 10, the right cylinder wall 12 and the drill disc 11, when it is necessary to discharge the soil, it is only necessary to lift the top cover 9, so that the pressure rod 902 hits the bottom of the power head 3, and the left cylinder wall 10, the right cylinder wall 12 and the drill disc 11 can all be unlocked and opened, and the soil therein can be quickly discharged, which greatly improves the speed of soil unloading. When the pressure rod 902 returns to its original position under the thrust of the compression spring 5 903, the left cylinder wall 10 and the right cylinder wall 12 are closed and locked with each other under the action of gravity. By placing the drill disc 11 toward the ground and squeezing it, the drill disc 11 can be locked with the left cylinder wall 10, and the three are re-closed, and then the bottom of the hole is lowered again to perform the hole-forming operation.

[0023] like Figure 7 and Figure 8 As shown, the outer wall of the secondary drill rod 5 is fixedly connected to the limiting slide bar 2 501, and the limiting slide bar 2 501 is slidably connected to the limiting slide groove 1 402. Through the cooperation of the limiting slide bar 2 501 and the limiting slide groove 1 402, the secondary drill rod 5 and the primary drill rod 4 can only be displaced axially; the inner wall of the secondary drill rod 5 is fixedly provided with a limiting slide groove 2 503 and a slot 2 504, and the slot 2 504 is fixedly connected with a guide limiting tooth 2 504A, and the guide limiting tooth 2 504A is arranged on the inner side of the slot 2 504; as shown in FIG. Fig.13 As shown, a limiting slide bar 3 701 is fixedly connected to the outer wall of the tertiary drill rod 7, and the limiting slide bar 3 701 is slidably connected to the limiting slide groove 2 503. Through the cooperation of the limiting slide bar 3 701 and the limiting slide groove 2 503, only axial displacement can be performed between the tertiary drill rod 7 and the secondary drill rod 5; a locking groove 702 is also provided on the upper side wall of the tertiary drill rod 7, and the locking groove 702 includes a vertical groove 702A, and the vertical groove 702A cooperates with the card groove 1 403B. When the limiting locking mechanism 6 enters the area of ​​the vertical groove 702A, the axial displacement of the primary drill rod 4 and the secondary drill rod 5 is fixedly locked and cannot be The secondary drill rod 5 and the tertiary drill rod 7 can move in any direction, while the secondary drill rod 5 and the tertiary drill rod 7 can make relative axial displacement; a guide wedge block 2 702B is fixedly installed at the bottom of the vertical slot 702A, and the guide wedge block 2 702B is fixedly provided with a second slot 702C in the horizontal direction, and the second slot 702C cooperates with the slot 1 403. When the limit locking mechanism 6 enters the area of ​​the second slot 702C under the drive of the guide wedge block 2 702B, the primary drill rod 4 and the secondary drill rod 5 can make relative axial displacement, while the axial displacement of the secondary drill rod 5 and the tertiary drill rod 7 is fixedly locked and cannot move in any direction.

[0024] like Fig. 9 , Fig.10 , Fig.11 and Fig.12As shown, the limit locking mechanism 6 includes a rotating block 601, which is slidably connected to the rotating groove 502. The front and rear parts of the rotating block 601 are both rotatably connected with rotating rings 604. The rotating ring 604 at the front of the rotating block 601 cooperates with the guide wedge 1 403C, and the rotating ring 604 at the rear of the rotating block 601 cooperates with the guide wedge 2 702B. When lowering the drill rods at various levels, the rotating ring 604 at the front of the rotating block 601 moves downward and contacts the guide wedge 1 403C, so that the rotating block 601 moves to the right of the rotating groove 502. When the drill rods of each level are lifted up, the rotating ring 604 at the rear of the rotating block 601 moves upward and contacts the guide wedge block 2 702B, so that the rotating block 601 slides to the left side of the rotating groove 502. At this time, the clamping groove 2 702C cooperates with the slot 1 403, the primary drill rod 4 and the secondary drill rod 5 resume moving, and the secondary drill rod 5 and the tertiary drill rod 7 are locked.

[0025] The rotating block 601 is fixedly provided with an inner cavity 601A, and sliding cavities 601B are fixedly provided on both sides of the inner cavity 601A. The sliding cavity 601B is slidably connected with a sliding lock 602. A fixed retaining ring 602A is fixedly connected to the outer wall of the sliding lock 602. The fixed retaining ring 602A cooperates with the inner cavity 601A. A compression spring 602B is fixedly connected to the front of the fixed retaining ring 602A. The other end of the compression spring 602B is fixedly connected to the inner cavity 601A. A slideway 602C is fixedly provided inside the sliding lock 602. A limiting groove 602D is fixedly provided on the side wall of the slide 602C, a lock head 603 is slidably connected in the slide 602C, a clamping block 603A is fixedly connected to both sides of the rear of the lock head 603, the clamping block 603A cooperates with the limiting groove 602D, a compression spring 603B is fixedly connected to the rear of the lock head 603, the other end of the compression spring 603B is fixedly connected to the bottom of the slide 602C, the lock head 603 cooperates with the guide limiting tooth 403A, and the rear of the sliding lock 602 cooperates with the extrusion lifting rod 2. When the extrusion block 202 of the extrusion lifting rod 2 contacts the slide lock 602, the slide lock 602 presses the compression spring 602B forward, and the slide lock 602 leads the lock head 603 to extend out of the sliding cavity 601B. At this time, the lock head 603 contacts the guide limiting tooth 403A, allowing the secondary drill rod 5 to extend relative to the primary drill rod 4, but preventing it from being retracted; when the extrusion block 202 of the extrusion lifting rod 2 does not contact the slide lock 602, the slide lock 602 moves backward under the push of the compression spring 602B, and the slide lock 602 leads the lock head 603 to retract into the sliding cavity 601B. At this time, the lock head 603 is out of contact with the guide limiting tooth 403A, and the secondary drill rod 5 can move freely relative to the primary drill rod 4.

[0026] like Fig.14 , Fig.15 and Fig.16As shown, the limiting mechanism 8 includes a shell 801, a second inner cavity 801A is fixedly opened in the shell 801, two sliding cavities 801B are fixedly opened at both ends of the second inner cavity 801A, a second sliding lock 802 is slidably connected to the second sliding cavity 801B, a second fixed retaining ring 802A is fixedly connected to the outer wall of the second sliding lock 802, the second fixed retaining ring 802A cooperates with the second inner cavity 801A, a third compression spring 802B is fixedly connected to the second fixed retaining ring 802A, the other end of the third compression spring 802B is fixedly connected to the second inner cavity 801A, and the second sliding lock 802 is fixedly opened inside. A second slideway 802C is provided, a second limiting groove 802D is fixedly provided on the side wall of the second slideway 802C, a second lock head 803 is slidably connected to the second slideway 802C, a second clamping block 803A is fixedly connected to the side wall of the second lock head 803, the second clamping block 803A cooperates with the second limiting groove 802D, a fourth compression spring 803B is fixedly connected to the rear of the second lock head 803, the other end of the fourth compression spring 803B is fixedly connected to the bottom of the second slideway 802C, the second lock head 803 cooperates with the second guide limiting tooth 504A, and the rear of the second sliding lock 802 cooperates with the extrusion lifting rod 2. When the extrusion block 202 of the extrusion lifting rod 2 contacts the slide lock 2 802, the slide lock 2 802 presses the compression spring 3 802B forward, and the slide lock 2 802 drives the lock head 2 803 to extend out of the slide cavity 2 801B. At this time, the lock head 2 803 contacts the guide limit tooth 2 504A, allowing the tertiary drill rod 7 to extend relative to the secondary drill rod 5, but preventing it from being retracted; when the extrusion block 202 of the extrusion lifting rod 2 does not contact the slide lock 2 802, the slide lock 2 802 moves backward under the push of the compression spring 3 802B, and the slide lock 2 802 drives the lock head 2 803 to retract into the slide cavity 2 801B. At this time, the lock head 2 803 is out of contact with the guide limit tooth 2 504A, and the tertiary drill rod 7 can move freely relative to the secondary drill rod 5.

[0027] like Fig.17 As shown, the extrusion lifting rod 2 includes an extrusion block 202, which is slidably connected to the inner wall of the third-level drill pipe 7. A pull block 201 is fixedly connected to the bottom of the extrusion block 202, and the pull block 201 extends downward to the bottom of the fixed clamping ring 703. A tension spring 203 is also fixedly connected to the bottom of the extrusion block 202, and the other end of the tension spring 203 is fixedly connected to the top of the fixed clamping ring 703. When the drill bit is placed at the bottom of the hole, the pull rope does not need to pull the extrusion block 202 upwards. At this time, the extrusion block 202 moves downward under its own gravity and the pulling force of the tension spring 203, so that when the extrusion block 202 contacts and squeezes the slide lock 2 802 and the slide lock 1 602, the drill bit can only move downward and cannot be retracted upward; when the drill bit is in the process of falling or lifting, the pull rope always pulls the extrusion block 202 upwards. At this time, the pull block 201 contacts and supports the fixed clamping ring 703 upwards, squeezing the slide lock 2 802 and the slide lock 1 602 to break away from the extrusion of the extrusion block 202, and the drill bit can move freely.

[0028] like Fig.19 and Fig. 20As shown, the middle of the top cover 9 is fixedly connected with a rotating shaft 901, which is arranged in the middle of the top cover 9, so that the right cylinder wall 12 and the left cylinder wall 10 can be kept in a closed state under the action of gravity; the top cover 9 is slidably connected with a pressure rod 902, the top of the pressure rod 902 is fixedly connected with a compression spring 5 903, the bottom of the compression spring 5 903 is fixedly connected to the top cover 9, and the bottom of the pressure rod 902 is fixedly connected with an extrusion top block 902A. Under the push of the compression spring 5 903, the pressure rod 902 maintains an upward posture, and only when the pressure rod 902 is pressed down by the power head 3, the extrusion top block 902A moves downward to press down and unlock the extrusion wedge block 2 1204A and the extrusion wedge block 1 1003A.

[0029] like Fig.21 and Fig. 22 As shown, a second rotating hole 1201 is fixedly provided at the outer end of the top of the right cylinder wall 12, and the second rotating hole 1201 is rotatably connected to the rotating shaft 901. A side notch 1202 is fixedly provided on the right cylinder wall 12, and mounting grooves 1203 are fixedly provided at both ends of the side notch 1202. An extrusion ring 1204 is slidably connected in the side notch 1202, and locking rods 1204B are fixedly connected at both ends of the extrusion ring 1204. The locking rod 1204B is slidably connected to the mounting groove 1203, and a compression spring 1205 is fixedly connected to the bottom of the locking rod 1204B, and the other end of the compression spring 1205 is fixedly connected to the bottom of the mounting groove 1203. An extrusion wedge block 1204A is fixedly connected to the middle part of the extrusion ring 1204, and the extrusion wedge block 1204A cooperates with the extrusion top block 902A. A fixing block 13 is fixedly connected to the inner wall of the bottom of the right cylinder wall 12. The locking rod 1204B maintains an upward posture under the push of the compression spring seven 1205, and the locking rod 1204B cooperates with the locking hook 1002 to lock the right cylinder wall 12 and the left cylinder wall 10; when the extrusion wedge block 1204A is pressed down by the extrusion top block 902A, the locking rod 1204B overcomes the compression spring seven 1205 and moves downward, the locking rod 1204B separates from the locking hook 1002, and the right cylinder wall 12 and the left cylinder wall 10 lose the locked state.

[0030] like Fig.24 and Fig.25As shown, a rotating hole 1001 is fixedly provided on the outer side of the top of the left cylinder wall 10, and the rotating hole 1001 is rotatably connected to the rotating shaft 901. A locking hook 1002 is fixedly connected to the side wall of the middle part of the left cylinder wall 10, and the locking hook 1002 cooperates with the locking rod 1204B. A sliding groove 1004 is fixedly provided on the lower part of the left cylinder wall 10, and a limiting groove 3 1004A is fixedly provided on the side wall of the sliding groove 1004. A locking block 1005 is slidably connected to the sliding groove 1004, and convex plates 1005C are fixedly connected on both sides of the locking block 1005. The convex plate 1005C cooperates with the limiting groove 3 1004A, and a compression spring 6 1005D is fixedly connected to the convex plate 1005C. The other end of the compression spring 6 1005D is fixedly connected to the limiting groove 3 The side wall of the positioning slot three 1004A is fixedly connected, an extrusion head 1005A is fixedly provided on the front of the locking block 1005, an extrusion head 1005B is fixedly connected to the top of the locking block 1005, an extrusion slide bar 1003 is slidably connected to the inner wall of the left cylinder wall 10, the bottom of the extrusion slide bar 1003 cooperates with the extrusion head 1005B, an extrusion wedge block 1003A is fixedly provided on the upper part of the extrusion slide bar 1003, the extrusion wedge block 1003A cooperates with the extrusion top block 902A, a tension spring 1003B is fixedly connected to the top of the extrusion wedge block 1003A, the other end of the tension spring 1003B is fixedly connected to the left cylinder wall 10, and a fixed block 13 is fixedly connected to the inner wall of the bottom of the left cylinder wall 10. The extrusion slide bar 1003 maintains an upward posture under the pull of the tension spring 2 1003B, and the locking block 1005 maintains an inwardly extended posture under the push of the compression spring 6 1005D. When the extrusion wedge block 1003A is pressed down by the extrusion top block 902A, the extrusion slide bar 1003 overcomes the tension spring 2 1003B and slides downward, and squeezes the extrusion head 2 1005B, so that the locking block 1005 retreats, the extrusion head 1005A disengages from the bayonet 1101C, and the drill disc 11 opens to release the soil.

[0031] like Fig.23As shown, the drill plate 11 includes a mounting plate 1101, one side of the mounting plate 1101 is fixedly connected to a swivel seat 1101A, the swivel seat 1101A is rotatably connected to the bottom of the right cylinder wall 12, the top of the other side of the mounting plate 1101 is fixedly connected to a bayonet 1101C, the bayonet 1101C is matched with the extrusion head 1005A, and a plurality of fixed grooves 1101B are fixedly provided on the side wall of the mounting plate 1101, and the fixed grooves 1101B are matched with the fixed block 13. By setting the fixed grooves 1101B and the fixed block 13, The torsional torque exerted on the drill disc 11 can be transmitted to the left cylinder wall 10 and the right cylinder wall 12, so as to prevent the swivel seat 1101A and the bayonet 1101C from bearing the torque alone, thereby improving the structural strength of the drill disc 11 when cutting soil and improving the service life of the drill disc 11; the center of the mounting disc 1101 is rotatably connected to a turntable 1102, a plurality of cutting heads 1102B are fixedly connected to the bottom of the turntable 1102, a protrusion 1102A is fixedly connected to the top of the turntable 1102, and the protrusion 1102A cooperates with the mounting disc 1101. When the mounting disk 1101 rotates forward, the cutting head 1102B cuts the ground, and the turntable 1102 is subjected to the friction of the ground and rotates and opens relative to the mounting disk 1101. When rotated to a certain angle, the protrusion 1102A contacts the mounting disk 1101, and the two cannot rotate relative to each other. The power of the power head 3 drives the cutting head 1102B to cut the ground; when the mounting disk 1101 rotates reversely, the cutting head 1102B cuts the ground, and the turntable 1102 is subjected to the friction of the ground and rotates and closes relative to the mounting disk 1101, bringing the soil out of the hole.

[0032] Working principle: 1. After the rotary drilling machine body 1 is in place, the lifting rod 2 is squeezed and lifted to support the drill rods at all levels. At this time, the pulling block 201 contacts the fixed clamping ring 703, the squeezing block 202 is away from the limit locking mechanism 6 and the limit mechanism 8, the lock head 603 is separated from the guide limit tooth 1 403A, and the lock head 2 803 is separated from the guide limit tooth 2 504A; 2. The extrusion lifting rod 2 is gradually lowered, and the drill rod is gradually put into the hole. First, the secondary drill rod 5 extends downward relative to the primary drill rod 4. When the two are completely extended, the swivel ring 604 at the front of the rotating block 601 contacts the guide wedge 403C, and the rotating block 601 moves to the right relative to the rotating groove 502. The front part of the rotating block 601 is inserted into the clamping groove 403B, so that the primary drill rod 4 and the secondary drill rod 5 are axially locked. The rear part of the rotating block 601 moves to the vertical groove 702A, and the secondary drill rod 5 and the tertiary drill rod 7 resume free movement. The tertiary drill rod 7 leads the drill bit to continue to move downward; 3. The drill bit contacts the bottom of the hole, the lifting rod 2 is squeezed to release the tension, and the tension spring 1 203 pulls the squeezing block 202 downward. At this time, the squeezing block 202 squeezes the limit locking mechanism 6 and the limit mechanism 8, the lock head 1 603 contacts the guide limit tooth 1 403A, and the lock head 2 803 contacts the guide limit tooth 2 504A; 4. The drill bits at each level can only extend from each other at this time, but cannot be retracted. The power head 3 applies downward pressure and rotational torque to drive the drill bit to cut the bottom of the hole and continue the hole-forming operation; 5. The drill bit is filled with soil, and the lifting rod 2 is squeezed and lifted. At this time, the squeezing block 202 moves up and disengages from the limit locking mechanism 6 and the limit mechanism 8, and the drill bits at each level are allowed to be retracted; 6. The lifting rod 2 is squeezed and gradually rises. First, the tertiary drill rod 7 is continuously retracted into the secondary drill rod 5. When the tertiary drill rod 7 is completely retracted, the swivel ring 604 at the rear of the rotating block 601 contacts the second guide wedge 702B, and the rotating block 601 moves to the left relative to the rotating groove 502. The rear of the rotating block 601 moves into the second clamping groove 702C, and the secondary drill rod 5 and the tertiary drill rod 7 are axially locked. The front of the rotating block 601 enters the first slot 403, so that the primary drill rod 4 and the secondary drill rod 5 resume free movement, and the secondary drill rod 5 continues to retract the primary drill rod 4. 7. After the drill bit is pulled out of the hole, continue to lift and squeeze the lifting rod 2, so that the pressure rod 902 pushes the power head 3. At this time, the left cylinder wall 10 and the right cylinder wall 12 are unlocked, the drill disc 11 and the left cylinder wall 10 are unlocked, and the pressure rod 902 continues to push the power head 3. The left cylinder wall 10 and the right cylinder wall 12 open, and the soil continues to fall. The soil unloading is completed, and the bottom of the lifting rod 2 is squeezed. The pressure rod 902 is separated from the bottom of the power head 3. The left cylinder wall 10 and the right cylinder wall 12 graduate and lock under the action of gravity, and the drill bit is pressed down to the ground. The drill disc 11 is closed and locked with the left cylinder wall 10, and the hole-forming operation continues.

[0033] The present invention is provided with a limit locking mechanism 6 and a limit mechanism 8. When the secondary drill rod 5 is placed at the bottom of the primary drill rod 4, the limit locking mechanism 6 automatically locks the relative axial position of the primary drill rod 4 and the secondary drill rod 5, and simultaneously unlocks the axial position fixation between the secondary drill rod 5 and the tertiary drill rod 7, allowing the tertiary drill rod 7 to detach from the secondary drill rod 5 and continue to extend downward, thereby ensuring that the drill bit extends downward for a longer distance. When the lifting operation is performed, after the tertiary drill rod 7 reaches the top of the secondary drill rod 5, the limit locking mechanism 6 axially locks the tertiary drill rod 7 and the secondary drill rod 5, and at the same time, The locking state between the secondary drill rod 5 and the tertiary drill rod 7 is released, so that the secondary drill rod 5 and the tertiary drill rod 7 continue to move upward. There is no need to frequently rotate the power head 3 to perform complicated locking and unlocking operations on the drill rods at each level, and the lifting process is smoother and faster; by setting the left cylinder wall 10, the right cylinder wall 12 and the drill disc 11, when it is necessary to unload the soil, it is only necessary to lift the top cover 9 to make the pressure rod 902 hit the bottom of the power head 3, and the left cylinder wall 10, the right cylinder wall 12 and the drill disc 11 can all be unlocked and opened to quickly discharge the soil therein, thereby greatly improving the unloading speed.

Claims

1. A rotary drilling rig, comprising a rotary drilling body (1), on which a power head (3) is slidably mounted, characterized in that: A first-stage drill rod (4) is slidably mounted on the power head (3); a limit slide bar (401) is fixedly connected to the outer wall of the first-stage drill rod (4); a limit slide groove (402) and a slot (403) are fixedly provided on the inner wall of the first-stage drill rod (4); a guide wedge block (403C) is fixedly provided at the bottom of the slot (403); a clamping groove (403B) is fixedly provided on the guide wedge block (403C) in the transverse direction; a guide limit tooth (403A) is fixedly connected to the slot (403); a second-stage drill rod (5) is slidably mounted inside the first-stage drill rod (4); a rotation groove (502) is fixedly provided on the upper side wall of the second-stage drill rod (5); a limit locking mechanism (6) is slidably connected to the rotation groove (502); and the second-stage drill rod (5) is fixedly provided with a rotation groove (502); and a limit locking mechanism (6) is slidably connected to the rotation groove (502). ) is slidably mounted inside the drill rod (7), a limiting mechanism (8) is fixedly mounted on the upper side wall of the drill rod (7), a fixing clamp (703) is fixedly connected to the upper inner wall of the drill rod (7), an extrusion lifting rod (2) is arranged inside the drill rod (7), the limiting locking mechanism (6) and the limiting mechanism (8) are both matched with the extrusion lifting rod (2), a pull rope is fixedly connected to the top of the extrusion lifting rod (2), the other end of the pull rope is fixedly connected to the rotary drilling machine body (1), a top cover (9) is fixedly connected to the bottom of the drill rod (7), a left cylinder wall (10) and a right cylinder wall (12) are rotatably connected to the top cover (9), a drill disc (11) is rotatably connected to the bottom of the right cylinder wall (12), and the drill disc (11) is matched with the left cylinder wall (10).

2. A rotary drilling rig according to claim 1, characterized in that: The outer wall of the secondary drill rod (5) is fixedly connected with a second limiting slide bar (501), the second limiting slide bar (501) is slidably connected to the first limiting slide groove (402), the inner wall of the secondary drill rod (5) is fixedly provided with a second limiting slide groove (503) and a second slot (504), the second slot (504) is fixedly connected with a second guide limiting tooth (504A), the outer wall of the tertiary drill rod (7) is fixedly connected with a third limiting slide bar (701), the third limiting slide bar (701) is slidably connected to the first limiting slide groove (402), the inner wall of the secondary drill rod (5) is fixedly provided with a second limiting slide groove (503) and a second slot (504), the second slot (504) is fixedly connected with a second guide limiting tooth (504A), The second slide groove (503) is slidably connected, and a locking groove (702) is also provided on the upper side wall of the third-level drill rod (7). The locking groove (702) includes a vertical groove (702A), and the vertical groove (702A) matches with the first clamping groove (403B). A second guide wedge block (702B) is fixedly installed at the bottom of the vertical groove (702A). The second guide wedge block (702B) is laterally fixed with a second clamping groove (702C), and the second clamping groove (702C) matches with the first slot (403).

3. The rotary drilling rig according to claim 1, characterized in that: The limit locking mechanism (6) comprises a rotating block (601), the rotating block (601) is slidably connected to the rotating groove (502), the front and rear parts of the rotating block (601) are both rotatably connected to rotating rings (604), the rotating ring (604) at the front of the rotating block (601) cooperates with the guide wedge block 1 (403C), the rotating ring (604) at the rear of the rotating block (601) cooperates with the guide wedge block 2 (702B), an inner cavity 1 (601A) is fixedly opened inside the rotating block (601), sliding cavities 1 (601B) are fixedly opened on both sides of the inner cavity 1 (601A), the sliding cavity 1 (601B) is slidably connected to a sliding lock 1 (602), a fixed retaining ring 1 (602A) is fixedly connected to the outer wall of the sliding lock 1 (602), the fixed retaining ring 1 (602A) cooperates with the inner cavity 1 (601A), the front of the fixed retaining ring 1 (602A) A compression spring (602B) is fixedly connected to the inner cavity (601A), and the other end of the compression spring (602B) is fixedly connected to the inner cavity (601A). A slideway (602C) is fixedly provided inside the sliding lock (602), and a limiting groove (602D) is fixedly provided on the side wall of the slideway (602C). A lock head (603) is slidably connected inside the slideway (602C). A clamping block (603A) is fixedly connected to the rear sides of the lock head (603), and the clamping block (603A) cooperates with the limiting groove (602D). A compression spring (603B) is fixedly connected to the rear of the lock head (603), and the other end of the compression spring (603B) is fixedly connected to the bottom of the slideway (602C). The lock head (603) cooperates with the guide limiting tooth (403A), and the rear of the sliding lock (602) cooperates with the extrusion lifting rod (2).

4. The rotary drilling rig according to claim 1, characterized in that: The limiting mechanism (8) comprises a shell (801), wherein an inner cavity (801A) is fixedly provided inside the shell (801), and two sliding cavities (801B) are fixedly provided at both ends of the inner cavity (801A), and a sliding lock (802) is slidably connected to the sliding cavity (801B), and a fixed retaining ring (802A) is fixedly connected to the outer wall of the sliding lock (802), and the fixed retaining ring (802A) cooperates with the inner cavity (801A), and a compression spring (802B) is fixedly connected to the fixed retaining ring (802A), and the other end of the compression spring (802B) is fixedly connected to the inner cavity (801A), and a fixed retaining ring (802B) is fixedly provided inside the sliding lock (802). A second slideway (802C) is provided, a second limiting groove (802D) is fixedly provided on the side wall of the second slideway (802C), a second lock head (803) is slidably connected to the second slideway (802C), a second clamping block (803A) is fixedly connected to the side wall of the second lock head (803), the second clamping block (803A) cooperates with the second limiting groove (802D), a fourth compression spring (803B) is fixedly connected to the rear of the second lock head (803), the other end of the fourth compression spring (803B) is fixedly connected to the bottom of the second slideway (802C), the second lock head (803) cooperates with the second guide limiting tooth (504A), and the rear of the second sliding lock (802) cooperates with the extrusion lifting rod (2).

5. The rotary drilling rig according to claim 1, characterized in that: The extrusion lifting rod (2) comprises an extrusion block (202), the extrusion block (202) is slidably connected to the inner wall of the third-level drill rod (7), a pulling block (201) is fixedly connected to the bottom of the extrusion block (202), the pulling block (201) extends downward to the bottom of the fixed clamping ring (703), and a tension spring (203) is also fixedly connected to the bottom of the extrusion block (202), and the other end of the tension spring (203) is fixedly connected to the top of the fixed clamping ring (703).

6. The rotary drilling rig according to claim 1, characterized in that: The middle of the top cover (9) is fixedly connected to a rotating shaft (901), the top cover (9) is slidably connected to a pressure rod (902), the top of the pressure rod (902) is fixedly connected to a compression spring five (903), the bottom of the compression spring five (903) is fixedly connected to the top cover (9), and the bottom of the pressure rod (902) is fixedly connected to an extrusion top block (902A).

7. The rotary drilling rig according to claim 1, characterized in that: The outer end of the top of the right cylinder wall (12) is fixedly provided with a second rotating hole (1201), the second rotating hole (1201) is rotatably connected to the rotating shaft (901), a side notch (1202) is fixedly provided on the right cylinder wall (12), mounting grooves (1203) are fixedly provided at both ends of the side notch (1202), an extrusion ring (1204) is slidably connected in the side notch (1202), and locking rods (1204B) are fixedly connected at both ends of the extrusion ring (1204), and the locking rod (1204B) is fixedly connected to the locking rod (1204B). 04B) is slidably connected to the mounting groove (1203), a compression spring seven (1205) is fixedly connected to the bottom of the locking rod (1204B), the other end of the compression spring seven (1205) is fixedly connected to the bottom of the mounting groove (1203), an extrusion wedge block two (1204A) is fixedly connected to the middle of the extrusion ring (1204), the extrusion wedge block two (1204A) cooperates with the extrusion top block (902A), and a fixing block (13) is fixedly connected to the inner wall at the bottom of the right cylinder wall (12).

8. The rotary drilling rig according to claim 1, characterized in that: The top outer side of the left cylinder wall (10) is fixedly provided with a rotating hole (1001), the rotating hole (1001) is rotatably connected to the rotating shaft (901), the middle side wall of the left cylinder wall (10) is fixedly connected with a locking hook (1002), the locking hook (1002) cooperates with the locking rod (1204B), the lower part of the left cylinder wall (10) is fixedly provided with a sliding groove (1004), the side wall of the sliding groove (1004) is fixedly provided with a limiting groove (1004A), the sliding groove (1004) is slidably connected with a locking block (1005), the two sides of the locking block (1005) are fixedly connected with convex plates (1005C), the convex plates (1005C) cooperate with the limiting groove (1004A), the convex plates (1005C) are fixedly connected with a compression spring (1005D), the other end of the compression spring (1005D) is connected to the limiting groove (1004A), and the locking block (1005) is fixedly connected with the locking block (1005). The limiting groove three (1004A) is fixedly connected to the side wall, the front of the locking block (1005) is fixedly provided with an extrusion head one (1005A), the top of the locking block (1005) is fixedly connected with an extrusion head two (1005B), the inner wall of the left cylinder wall (10) is slidably connected with an extrusion slide bar (1003), the bottom of the extrusion slide bar (1003) is matched with the extrusion head two (1005B), the upper part of the extrusion slide bar (1003) is fixedly provided with an extrusion wedge block one (1003A), the extrusion wedge block one (1003A) is matched with the extrusion top block (902A), the top of the extrusion wedge block one (1003A) is fixedly connected with a tension spring two (1003B), the other end of the tension spring two (1003B) is fixedly connected with the left cylinder wall (10), and the inner wall at the bottom of the left cylinder wall (10) is fixedly connected with a fixed block (13).

9. The rotary drilling rig according to claim 1, characterized in that: The drilling disc (11) comprises a mounting disc (1101), one side of the mounting disc (1101) is fixedly connected to a rotating seat (1101A), the rotating seat (1101A) is rotatably connected to the bottom of the right cylinder wall (12), the top of the other side of the mounting disc (1101) is fixedly connected to a bayonet (1101C), the bayonet (1101C) cooperates with an extrusion head (1005A), a plurality of groups of fixing grooves (1101B) are fixedly provided on the side wall of the mounting disc (1101), the fixing grooves (1101B) cooperate with a fixing block (13), a rotating disc (1102) is rotatably connected to the center of the mounting disc (1101), a plurality of groups of cutting heads (1102B) are fixedly connected to the bottom of the rotating disc (1102), a protrusion (1102A) is fixedly connected to the top of the rotating disc (1102), and the protrusion (1102A) cooperates with the mounting disc (1101).

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