Square pile round drill hole-forming positioning device

Abstract

The invention belongs to the technical field of square pile round drills, and particularly relates to a square pile round drill hole-forming positioning device which comprises a connecting shaft, the top end of the connecting shaft is fixedly connected with a first connector, the bottom end of the connecting shaft is fixedly connected with a second connector, and the side wall of the connecting shaft is fixedly connected with a fixing ring. A connecting ring is rotationally connected to the side wall of the fixing ring, a set of hollow connecting rods are arranged on the side wall of the connecting ring, and adjusting rods are arranged at the ends, away from the connecting ring, of the connecting rods; when the round drill drills into a tunnel, a first spring can push a second circular ring, so that the second circular ring applies thrust to an adjusting rod, the adjusting rod can move in a connecting rod, a rotating assembly on the adjusting rod can abut against the inner wall of a drill hole at the moment, and therefore the round drill is positioned to prevent the round drill from deviating in the drilling process; the tunnel excavation accuracy is greatly improved, and in the drilling process of the round drill, the rotating assembly can rotate so as to prevent the positioning device from affecting advancing of the round drill.

Description

Technical Field

[0001] The present invention belongs to the technical field of square pile round drilling, and specifically relates to a hole-forming positioning device for square pile round drilling. Background Art

[0002] Square pile round drilling is an advanced drilling technology applied in tunnel engineering, mainly used for the construction of tunnel support structures. By adopting the process of combining square pile bodies with round drill bits, this technology can efficiently complete drilling operations under complex geological conditions. During construction, a round drill bit is first used for pilot hole drilling, and then the hole wall is reinforced with square pile bodies to form a stable support structure. This method has the dual advantages of high efficiency of round drilling and strong bearing capacity of square pile bodies, and is particularly suitable for poor geological sections such as soft rock and fracture zones.

[0003] The invention patent with the publication number CN113565520A discloses an injection mold. The key points of its technical solution are: including a power input connecting square head shaft, a round drill bit is fixedly arranged on the lower side wall of the power input connecting square head shaft, an attached wall cylinder is sleeved outside the power input connecting square head shaft, an X-axis protective arm is horizontally arranged at the upper end of the front side wall of the attached wall cylinder, and the rear end of the X-axis protective arm is rotatably connected to the front side wall of the attached wall cylinder.

[0004] Since the round drill of the current square pile is drilling, the tunnel surrounding rock usually consists of rock layers or soil layers with different hardnesses, such as soft rock, hard rock, fracture zones, etc. alternating. When the drill bit drills in strata with different strengths, the difference in rock shear strength will cause different cutting resistances at each part of the drill bit, resulting in uneven stress. If cracks, karst caves or soft interlayers are encountered, the local part of the drill bit may suddenly lose load, while other parts still bear greater resistance, exacerbating the risk of deviation, thus affecting the accuracy of tunnel excavation. Therefore, the present invention provides a hole-forming positioning device for square pile round drilling. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem proposed in the background art, the present invention provides a hole-forming positioning device for square pile round drilling.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: A positioning device for circular drilling of square piles according to the present invention includes a connecting shaft. A first connecting head is fixedly connected to the top end of the connecting shaft, and a second connecting head is fixedly connected to the bottom end of the connecting shaft. A fixing ring is fixedly connected to the side wall of the connecting shaft. A connecting ring is rotatably connected to the side wall of the fixing ring. A group of hollow connecting rods are arranged on the side wall of the connecting ring. An adjusting rod is arranged at one end of the connecting rod away from the connecting ring. A first circular ring is fixedly connected to the surface of the connecting rod, and a second circular ring is fixedly connected to the surface of the adjusting rod. A first spring is fixedly connected between the first circular ring and the second circular ring. A rotating component is arranged on the side of the adjusting rod away from the connecting rod.

[0007] Preferably, a hollow groove is formed in the inner wall of the connecting ring. A pushing ring is hermetically slidably connected to the inner wall of the hollow groove. An electromagnet magnetically attracting the pushing ring is fixedly connected to the bottom surface of the inner wall of the hollow groove. A group of second springs are fixedly connected between the top surface of the pushing ring and the inner wall of the hollow groove. A circular hole communicating with the hollow groove is formed in the side wall of the connecting ring. The circular hole is located above the pushing ring. The adjusting rod is hermetically slidably connected to the inner walls of the connecting rod. One end of the adjusting rod close to the fixing ring communicates with the hollow groove.

[0008] Preferably, an "L"-shaped limiting rod is arranged on the side of the adjusting rod close to the fixing ring. The limiting rod hooks on the inner wall of the hollow groove. A moving component for the limiting rod to move is arranged on the connecting ring.

[0009] Preferably, the moving component includes a sliding groove formed on the side of the adjusting rod close to the fixing ring. A slider is slidably connected to the inner wall of the sliding groove. A third spring is fixedly connected between the bottom surface of the slider and the inner wall of the sliding groove. One side of the slider away from the adjusting rod is fixedly connected to the limiting rod. The limiting rod is made of a material magnetically attracted by the electromagnet.

[0010] Preferably, the rotating component includes a connecting block fixed on the adjusting rod. One side of the connecting block away from the adjusting rod is open. A circular shaft is fixedly connected to the inner wall of the connecting block. A driving wheel is rotatably connected to the surface of the circular shaft. A group of arc-shaped pieces uniformly arranged in a ring are fixedly connected to the surface of the driving wheel.

[0011] Preferably, the inside of the driving wheel is of a hollow structure. The circular shaft passes through the driving wheel. A disc is slidably connected to the surface of the circular shaft. The side wall of the disc is attached to the inner wall of the driving wheel. A group of inclined air outlet holes are formed in the outer side wall of the driving wheel. A pair of driving springs are fixedly connected to one side of the disc. One end of the driving spring away from the disc is fixedly connected to the inner wall of the driving wheel. A first magnetic block is fixedly connected to the side wall of the circular shaft. A second magnetic block magnetically attracted to the first magnetic block is fixedly connected to the side of the disc close to the driving spring.

[0012] Preferably, a cavity is formed in the connecting ring, a fixing rod is arranged in the cavity, a wire reel is fixedly connected to the bottom end of the fixing rod, a connecting wire is fixedly connected to the side wall of the wire reel, one end of the connecting wire away from the wire reel is fixedly connected to the adjusting rod, and a rotating assembly for driving the fixing rod to rotate is arranged in the fixing ring.

[0013] Preferably, the rotating assembly includes a connecting sleeve slidably connected to the top surface of the connecting ring. The connecting sleeve extends into the cavity. The fixing rod is rotatably connected to the inner wall of the connecting sleeve. A circular sleeve is fixedly connected to the side wall of the connecting sleeve. A set of fourth springs are fixedly connected between the top surface of the circular sleeve and the cavity. A first gear is fixedly connected to the top surface of the fixing rod. A second gear meshing with the first gear is fixedly connected to the side wall of the fixing ring. The electromagnet is arranged in the cavity and the hollow groove. The fixing rod is made of a magnetic material magnetically attracted to the electromagnet.

[0014] The beneficial effects of the present invention are as follows: 1. When the round drill penetrates into the tunnel, the first spring will push the second ring, so that the second ring exerts a thrust on the adjusting rod, enabling the adjusting rod to move within the connecting rod. At this time, the rotating assembly on the adjusting rod will abut against the inner wall of the drill hole, thereby positioning the round drill to prevent the round drill from deviating during drilling, greatly improving the accuracy of tunnel excavation. During the drilling process of the round drill, the rotating assembly will rotate to prevent the positioning device from affecting the forward movement of the round drill.

[0015] 2. When the positioning device in the present invention enters the drill hole, the electromagnet can be activated, causing the electromagnet to attract the push ring. At this time, the push ring will push the gas in the hollow groove, allowing the gas to enter the connecting rod and push the adjusting rod, so as to increase the adhesion force between the rotating assembly and the hole wall, thereby further improving the stability of positioning the round drill. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 is a schematic structural diagram of the positioning device in the present invention; Figure 2 is a schematic diagram of the internal structures of the connecting ring and the fixing ring in the present invention; Figure 3 is Figure 2 an enlarged view of part A in; Figure 4 is a schematic diagram of the internal structures of the connecting block and the driving wheel in the present invention; Figure 5 is a schematic diagram of the structures of the connecting ring and the fixing ring in the present invention; Figure 6 is Figure 5 an enlarged view of part B in.

[0018] In the figure: 1. First connector; 2. Connecting shaft; 3. Second connector; 4. Fixed ring; 5. Connecting ring; 6. Connecting rod; 7. Adjusting rod; 8. First ring; 9. Second ring; 10. Hollow groove; 11. Pushing ring; 12. Electromagnet; 13. Chute; 14. Slide block; 15. Limiting rod; 16. Connecting block; 17. Driving wheel; 18. Circular shaft; 19. Arc-shaped piece; 20. Air outlet; 21. First magnet; 22. Second magnet; 23. Driving spring; 24. Fixed rod; 25. Wire winding wheel; 26. Connecting wire; 27. Cavity; 28. Connecting sleeve; 29. Circular sleeve; 30. First gear; 31. Second gear; 32. Disc. Specific embodiments

[0019] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] Embodiment 1: As Figures 1 to 4 shown, a square pile circular drill hole positioning device according to an embodiment of the present invention includes a connecting shaft 2. The top end of the connecting shaft 2 is fixedly connected with a first connector 1, and the bottom end of the connecting shaft 2 is fixedly connected with a second connector 3; a fixed ring 4 is fixedly connected to the side wall of the connecting shaft 2, a connecting ring 5 is rotatably connected to the side wall of the fixed ring 4, a group of hollow connecting rods 6 are arranged on the side wall of the connecting ring 5, and an adjusting rod 7 is arranged at one end of the connecting rod 6 away from the connecting ring 5; a first ring 8 is fixedly connected to the surface of the connecting rod 6, a second ring 9 is fixedly connected to the surface of the adjusting rod 7, a first spring is fixedly connected between the first ring 8 and the second ring 9, and a rotating assembly is arranged on the side of the adjusting rod 7 away from the connecting rod 6; The first connector 1 is used to connect the square pile power mechanism that drives the connecting shaft 2 to rotate, and the second connector 3 is used to connect the circular drill. When the circular drill drills into the tunnel, the first spring will push the second ring 9, so that the second ring 9 exerts a thrust on the adjusting rod 7, so that the adjusting rod 7 can move in the connecting rod 6. At this time, the rotating assembly on the adjusting rod 7 will abut against the inner wall of the drill hole, thereby positioning the circular drill to prevent the circular drill from shifting during drilling, greatly improving the accuracy of tunnel excavation. During the drilling process of the circular drill, the rotating assembly will rotate to prevent the positioning device from affecting the forward movement of the circular drill.

[0021] The inner wall of the connecting ring 5 is provided with a hollow groove 10. The inner wall of the hollow groove 10 is hermetically and slidably connected with a pushing ring 11. The bottom surface of the inner wall of the hollow groove 10 is fixedly connected with an electromagnet 12 that magnetically attracts the pushing ring 11. A group of second springs are fixedly connected between the top surface of the pushing ring 11 and the inner wall of the hollow groove 10. The side wall of the connecting ring 5 is provided with a circular hole communicating with the hollow groove 10, and the circular hole is located above the pushing ring 11. The adjusting rod 7 is hermetically and slidably connected with the inner wall of the connecting rod 6. One end of the adjusting rod 7 close to the fixed ring 4 communicates with the hollow groove 10. When the positioning device in this application enters the drill hole, the electromagnet 12 can be started, so that the electromagnet 12 attracts the pushing ring 11. At this time, the pushing ring 11 will push the gas in the hollow groove 10, so that the gas enters the connecting rod 6 to push the adjusting rod 7, so as to increase the adhesion force between the rotating assembly and the hole wall, thereby further improving the stability of positioning the round drill.

[0022] An "L"-shaped limiting rod 15 is arranged on one side of the adjusting rod 7 close to the fixed ring 4. The limiting rod 15 is hooked on the inner wall of the hollow groove 10. A moving assembly for the limiting rod 15 to move is arranged on the connecting ring 5. The adjusting rod 7 in this application can be accommodated in the connecting rod 6 to reduce the volume of the positioning device, which is convenient for transportation and assembly. When the round drill drills to a certain depth of 2-3 meters, the moving assembly can be used to drive the limiting rod 15 to move downward, so that the limiting rod 15 is no longer hooked on the inner wall of the hollow groove 10. At this time, the thrust of the first spring can be used to push the adjusting rod 7 to move away from the fixed ring 4.

[0023] The moving assembly includes a sliding groove 13 opened on one side of the adjusting rod 7 close to the fixed ring 4. The inner wall of the sliding groove 13 is slidably connected with a slider 14. A third spring is fixedly connected between the bottom surface of the slider 14 and the inner wall of the sliding groove 13. One side of the slider 14 away from the adjusting rod 7 is fixedly connected with the limiting rod 15. The limiting rod 15 is made of a material that is magnetically attracted by the electromagnet 12. When it is necessary to move the adjusting rod 7 away from the fixed ring 4 in this application, the electromagnet 12 can be started, so that the electromagnet 12 simultaneously attracts the limiting rod 15 and the pushing ring 11. The limiting rod 15 will first move downward, so that it is no longer hooked on the inner wall of the hollow groove 10. Then the pushing ring 11 will push the gas in the hollow groove 10 into the connecting rod 6, thereby pushing the adjusting rod 7 to move. At the same time, the first spring will also apply a thrust to push the adjusting rod 7.

[0024] The rotating assembly includes a connecting block 16 fixed to the adjusting rod 7. One side of the connecting block 16 away from the adjusting rod 7 is open. The inner wall of the connecting block 16 is fixedly connected with a circular shaft 18. The surface of the circular shaft 18 is rotatably connected with a driving wheel 17. The surface of the driving wheel 17 is fixedly connected with a group of arc-shaped pieces 19 arranged annularly and evenly. When the adjusting rod 7 in this application is pushed, the driving wheel 17 will also be pushed. At this time, the arc-shaped pieces 19 will be inserted into the hole wall to improve the stability of the positioning device when moving forward. As the round drill penetrates deeper, the driving wheel 17 will rotate, so as to ensure the forward movement of the positioning device.

[0025] The inside of the driving wheel 17 is a hollow structure. The circular shaft 18 passes through the driving wheel 17. The surface of the circular shaft 18 is slidably connected with a disc 32. The side wall of the disc 32 is attached to the inner wall of the driving wheel 17. A group of inclined air outlets 20 are opened on the outer side wall of the driving wheel 17. One side of the disc 32 is fixedly connected with a pair of driving springs 23. The end of the driving spring 23 away from the disc 32 is fixedly connected with the inner wall of the driving wheel 17. The side wall of the circular shaft 18 is fixedly connected with a first magnet 21. The side of the disc 32 close to the driving spring 23 is fixedly connected with a second magnet 22 magnetically attracted to the first magnet 21. In this application, the arc-shaped pieces 19 need to be inserted into the hole wall. At this time, when the arc-shaped pieces 19 rotate, it is easy for soil to get stuck between the arc-shaped pieces 19. Through the above mechanism, when the driving wheel 17 rotates, the disc 32 will rotate synchronously with the driving wheel 17. When the first magnet 21 corresponds to the second magnet 22, the first magnet 21 will attract the second magnet 22. At this time, the disc 32 will push the gas in the driving wheel 17 to blow out from the air outlet 20 to between the arc-shaped pieces 19. When the first magnet 21 and the second magnet 22 are misaligned, the driving spring 23 will push the disc 32 to reset. Since the driving wheel 17 will continue to rotate, the first magnet 21 can intermittently pass by the second magnet 22, so that the gas can continuously blow between the arc-shaped pieces 19 to prevent soil from getting stuck between the arc-shaped pieces 19 and affecting the rotation of the driving wheel 17.

[0026] Embodiment 2: As Figures 5 to 6As shown, compared with the first comparative example, another implementation manner of the present invention is as follows: a cavity 27 is provided in the connecting ring 5, a fixing rod 24 is arranged in the cavity 27, a wire reel 25 is fixedly connected to the bottom end of the fixing rod 24, a connecting wire 26 is fixedly connected to the side wall of the wire reel 25, one end of the connecting wire 26 far away from the wire reel 25 is fixedly connected to the adjusting rod 7, and a rotating assembly for driving the fixing rod 24 to rotate is arranged in the fixing ring 4; in the present application, after the round drill finishes drilling, it is necessary for the round drill to withdraw from the drill hole. At this time, the round drill will rotate in reverse. However, if the driving wheel 17 abuts against the hole wall at this time, it will increase the resistance for the round drill to withdraw. At this time, the rotating assembly can be used to drive the fixing rod 24 to rotate, so that the fixing rod 24 drives the wire reel 25 to rotate. At this time, the connecting wire 26 can be wound around the wire reel 25, thereby pulling the adjusting rod 7 by the connecting wire, so that the driving wheel 17 is far away from the hole wall, so as to reduce the resistance for the round drill to withdraw from the drill hole.

[0027] The rotating assembly includes a connecting sleeve 28 slidably connected to the top surface of the connecting ring 5. The connecting sleeve 28 extends into the cavity 27. The fixing rod 24 is rotatably connected to the inner wall of the connecting sleeve 28. A round sleeve 29 is fixedly connected to the side wall of the connecting sleeve 28. A group of fourth springs are fixedly connected between the top surface of the round sleeve 29 and the cavity 27. A first gear 30 is fixedly connected to the top surface of the fixing rod 24. A second gear 31 meshing with the first gear 30 is fixedly connected to the side wall of the fixing ring 4. The electromagnet 12 is arranged in the cavity 27 and the hollow groove 10. The fixing rod 24 is made of a magnetic material magnetically attracted to the electromagnet 12.

[0028] In this application, the electromagnet 12 is provided with two gears. In the first gear, the fixed rod 24 and the limiting rod 15 are simultaneously attracted to move downward. The first gear 30 on the fixed rod 24 will disengage from the second gear 31, and the limiting rod 15 will no longer contact the inner wall of the hollow groove 10. In the second gear, the fixed rod 24 and the limiting rod 15 are simultaneously attracted to move downward. The limiting rod 15 will continue to contact the inner wall of the hollow groove 10, and the first gear 30 on the fixed rod 24 will disengage from the second gear 31. When it is necessary to move the adjusting rod 7 to the side away from the fixed ring 4, the first gear can be activated to make the limiting rod 15 no longer contact the inner wall of the hollow groove 10. Then the adjusting rod 7 can move to the side away from the fixed ring 4. At the same time, the fixed rod 24 will move downward to make the first gear 30 not engage with the second gear 31. When the connecting shaft 2 rotates at this time, the fixed ring 4 will rotate synchronously, but the fixed rod 24 will not rotate at this time. When it is necessary to make the adjusting rod 7 slide into the connecting rod 6, the first magnet can be turned off. At this time, the fourth spring will pull the round sleeve 29, so that the round sleeve 29 drives the fixed rod 24 to move upward, so that the first gear 30 engages with the second gear 31. Then reverse the round drill. At this time, the fixed ring 4 will also rotate, so that the second gear 31 drives the first gear 30 to rotate, so that the fixed rod 24 rotates, so that the wire reel 25 rotates, so that the connecting wire 26 pulls the adjusting rod 7, so that the adjusting rod 7 is retracted into the connecting rod 6. At the same time, the limiting rod 15 will enter the hollow groove 10, and then the third spring will push the slider 14, so that the slider 14 drives the limiting rod 15 to hook on the inner wall of the hollow groove 10, so that the driving wheel 17 no longer contacts the hole wall, so that the round drill can smoothly exit from the drill hole.

[0029] Working principle: When the round drill drills into the tunnel, the first spring will push the second ring 9, so that the second ring 9 exerts a thrust on the adjusting rod 7, so that the adjusting rod 7 can move in the connecting rod 6. At this time, the rotating assembly on the adjusting rod 7 will abut against the inner wall of the drill hole, so as to position the round drill, so as to prevent the round drill from shifting during drilling, greatly improving the accuracy of tunnel excavation. During the drilling process of the round drill, the rotating assembly will rotate to prevent the positioning device from affecting the forward movement of the round drill; when the positioning device enters the drill hole, the electromagnet 12 can be activated, so that the electromagnet 12 attracts the push ring 11. At this time, the push ring 11 will push the gas in the hollow groove 10, so that the gas enters the connecting rod 6 to push the adjusting rod 7, so as to increase the adhesion force between the rotating assembly and the hole wall, so as to further improve the stability of positioning the round drill; the adjusting rod 7 in this application can be stored in the connecting rod 6 to reduce the volume of the positioning device, which is convenient for transportation and assembly. When the round drill drills to a certain depth of 2-3 meters, the limiting rod 15 can be driven to move downward by means of the moving assembly, so that the limiting rod 15 no longer hooks on the inner wall of the hollow groove 10. At this time, the adjusting rod 7 can be pushed to the side away from the fixed ring 4 by the thrust of the first spring; When the present application needs to move the rod 7 to the side away from the fixed ring 4, the electromagnet 12 can be activated, so that the electromagnet 12 simultaneously attracts the limit rod 15 and the push ring 11. The limit rod 15 will first move downward, so that it will no longer hook on the inner wall of the hollow groove 10. Then the push ring 11 will push the gas in the hollow groove 10 into the connecting rod 6, so as to push the adjusting rod 7 to move. At the same time, the first spring will also push the adjusting rod 7 to apply a thrust. When the adjusting rod 7 in the present application is pushed, the driving wheel 17 will also be pushed. At this time, the arc-shaped piece 19 will be inserted into the hole wall to improve the stability of the positioning device when moving forward. As the round drill penetrates deeper, the driving wheel 17 will rotate, so as to ensure the forward movement of the positioning device. In the present application, the arc-shaped piece 19 needs to be inserted into the hole wall. At this time, when the arc-shaped piece 19 rotates, it is easy for soil to get stuck between the arc-shaped pieces 19. Through the above mechanism, when the driving wheel 17 rotates, the disc 32 will rotate synchronously with the driving wheel 17. When the first magnet 21 corresponds to the second magnet 22, the first magnet 21 will attract the second magnet 22. At this time, the disc 32 will push the gas in the driving wheel 17 to blow out from the air outlet 20 between the arc-shaped pieces 19. When the first magnet 21 is misaligned with the second magnet 22, the driving spring 23 will push the disc 32 to reset. Since the driving wheel 17 will continue to rotate, the first magnet 21 can intermittently pass by the second magnet 22, so that the gas can continuously blow between the arc-shaped pieces 19 to prevent soil from getting stuck between the arc-shaped pieces 19 and affecting the rotation of the driving wheel 17.

[0030] The above front, back, left, right, up, and down are all based on the Figure 1 in the attached drawings of the specification. Taking the perspective of the person observing as the standard, the side of the device facing the observer is defined as the front, and the left side of the observer is defined as the left, and so on.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection scope of the present invention.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning device for drilling a round hole in a square pile, comprising a connecting shaft (2), the top end of the connecting shaft (2) is fixedly connected with a first connecting head (1), and the bottom end of the connecting shaft (2) is fixedly connected with a second connecting head (3); It is characterized in that: The side wall of the connecting shaft (2) is fixedly connected with a fixing ring (4), the side wall of the fixing ring (4) is rotatably connected with a connecting ring (5), a group of hollow connecting rods (6) are arranged on the side wall of the connecting ring (5), and an adjusting rod (7) is arranged at one end of the connecting rod (6) far away from the connecting ring (5); The surface of the connecting rod (6) is fixedly connected with a first ring (8), the surface of the adjusting rod (7) is fixedly connected with a second ring (9), a first spring is fixedly connected between the first ring (8) and the second ring (9), and a rotating component is arranged on the side of the adjusting rod (7) far away from the connecting rod (6).

2. The positioning device for circular drilling of square piles according to claim 1, characterized in that: A hollow groove (10) is opened on the inner wall of the connecting ring (5), a pushing ring (11) is hermetically slidably connected to the inner wall of the hollow groove (10), an electromagnet (12) magnetically attracted to the pushing ring (11) is fixedly connected to the bottom surface of the inner wall of the hollow groove (10), a group of second springs are fixedly connected between the top surface of the pushing ring (11) and the inner wall of the hollow groove (10), a circular hole communicating with the hollow groove (10) is opened on the side wall of the connecting ring (5), the circular hole is located above the pushing ring (11), the adjusting rod (7) is hermetically slidably connected to the inner walls of the connecting rod (6), and one end of the adjusting rod (7) close to the fixing ring (4) communicates with the hollow groove (10).

3. The positioning device for circular drilling of square piles according to claim 2, wherein: A "L"-shaped limiting rod (15) is arranged on the side of the adjusting rod (7) close to the fixing ring (4), the limiting rod (15) is hooked on the inner wall of the hollow groove (10), and a moving component for the limiting rod (15) to move is arranged on the connecting ring (5).

4. A positioning device for circular drilling of square piles according to claim 3, characterized in that: The moving component includes a sliding groove (13) opened on the side of the adjusting rod (7) close to the fixing ring (4), a slider (14) is slidably connected to the inner wall of the sliding groove (13), a third spring is fixedly connected between the bottom surface of the slider (14) and the inner wall of the sliding groove (13), the side of the slider (14) far away from the adjusting rod (7) is fixedly connected with the limiting rod (15), and the limiting rod (15) is made of a material magnetically attracted to the electromagnet (12).

5. A positioning device for circular drilling of square piles according to claim 1, characterized in that: The rotating component includes a connecting block (16) fixed on the adjusting rod (7), the side of the connecting block (16) far away from the adjusting rod (7) is open, a round shaft (18) is fixedly connected to the inner wall of the connecting block (16), a driving wheel (17) is rotatably connected to the surface of the round shaft (18), and a group of arc-shaped pieces (19) uniformly arranged in a ring are fixedly connected to the surface of the driving wheel (17).

6. The positioning device for circular drilling of square piles according to claim 5, characterized in that: The interior of the driving wheel (17) is of a hollow structure. The circular shaft (18) passes through the driving wheel (17). A disc (32) is slidably connected to the surface of the circular shaft (18). The side wall of the disc (32) is in contact with the inner wall of the driving wheel (17). A set of inclined air outlets (20) are formed in the outer side wall of the driving wheel (17). A pair of driving springs (23) are fixedly connected to one side of the disc (32). The ends of the driving springs (23) far from the disc (32) are fixedly connected to the inner wall of the driving wheel (17). A first magnet (21) is fixedly connected to the side wall of the circular shaft (18). A second magnet (22) magnetically attracted to the first magnet (21) is fixedly connected to the side of the disc (32) close to the driving springs (23).

7. A positioning device for circular drilling of square piles according to claim 4, characterized in that: A cavity (27) is formed in the connecting ring (5). A fixing rod (24) is arranged in the cavity (27). A wire winding wheel (25) is fixedly connected to the bottom end of the fixing rod (24). A connecting wire (26) is fixedly connected to the side wall of the wire winding wheel (25). The end of the connecting wire (26) far from the wire winding wheel (25) is fixedly connected to the adjusting rod (7). A rotating assembly for driving the fixing rod (24) to rotate is arranged in the fixing ring (4).

8. The positioning device for circular drilling of square piles according to claim 7, characterized in that: The rotating assembly includes a connecting sleeve (28) slidably connected to the top surface of the connecting ring (5). The connecting sleeve (28) extends into the cavity (27). The fixing rod (24) is rotatably connected to the inner wall of the connecting sleeve (28). A circular sleeve (29) is fixedly connected to the side wall of the connecting sleeve (28). A set of fourth springs are fixedly connected between the top surface of the circular sleeve (29) and the cavity (27). A first gear (30) is fixedly connected to the top surface of the fixing rod (24). A second gear (31) meshing with the first gear (30) is fixedly connected to the side wall of the fixing ring (4). The electromagnet (12) is arranged in the cavity (27) and the hollow groove (10). The fixing rod (24) is made of a magnetic material magnetically attracted to the electromagnet (12).

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