An energy-saving borehole enlargement construction device for coal mine geological exploration

Abstract

This invention relates to the field of coal mine geological exploration technology and discloses an energy-saving borehole enlargement device for coal mine geological exploration. The device includes a rotary cutting drilling mechanism and a combined drive mechanism. Internally, it comprises a drive motor capable of longitudinal movement and generating a driving effect, a longitudinal rotating shaft connected to the rotor of the drive motor and capable of driving a triangular rotating body to rotate, and a fixed sleeve mounted on the outside of the longitudinal rotating shaft via bearings and a sealing ring, capable of transmitting fluid to the inside of the triangular rotating body. This energy-saving borehole enlargement device for coal mine geological exploration utilizes rotary cutting to enlarge soil cavities, featuring low energy consumption, thus achieving energy-saving borehole enlargement. Furthermore, the device utilizes hydraulic technology to control the distance between the rotary cutting blade and the rotation axis, thereby enabling borehole enlargement functions for different hole radii and improving the applicability of the equipment in terms of rotary cutting radius.

Description

Technical Field

[0001] This invention relates to the field of coal mine geological exploration technology, specifically to an energy-saving borehole enlargement construction device for coal mine geological exploration. Background Technology

[0002] During coal mine geological exploration, it is necessary to drill holes underground, and in special locations, it is necessary to enlarge the holes. Therefore, specific hole enlargement equipment is required.

[0003] For example, Chinese patent publication number "CN112031648A" discloses "A Hole Enlarging Device for Construction on Soft Soil Foundations," whose main structure includes a base plate, a hole enlarging device, a quick-acting crank device, an impact device, a retracting device, an auxiliary device, and a moving device. The base plate has a placement hole through which the hole enlarging device passes and connects to the retracting device fixedly connected to the base plate. The quick-acting crank device is fixedly connected to the base plate adjacent to the retracting device. The impact device is placed below the quick-acting crank device and connected to it. The auxiliary device is movably connected to... At the bottom of the hole-expanding device, the moving device is fixedly connected to the bottom of the base plate. The hole-expanding device includes a hole-expanding seat, a hole-expanding groove, a first hole-expanding slider, a second hole-expanding slider, a hole-expanding baffle, and a hole-expanding cone. The hole-expanding seat is fan-shaped, and there are six hole-expanding seats. The six hole-expanding seats form a cylinder. The hole-expanding groove is opened on the hole-expanding seat. This hole-expanding device for soft soil foundation construction uses six hole-expanding seats to form a cylindrical device. The hole-expanding seats and the hole-expanding cone are used together. The hole-expanding cone is struck by a gravity hammer to expand the hole-expanding seat in all directions. The hole-expanding baffle then blocks the gap opened after the hole-expanding seat expands.

[0004] It is evident that the aforementioned borehole enlargement device for soft soil foundation construction uses dynamic compaction to cause the six borehole seats to move outward, thereby expanding the borehole to the periphery. However, when the borehole seats move outward, they are subjected to resistance from the surrounding soil compression. This resistance is related to the contact area between the borehole seats and the soil. Therefore, using dynamic compaction to enlarge the borehole requires strong kinetic energy and a huge amount of energy, which undoubtedly leads to energy waste. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an energy-saving borehole enlargement device for coal mine geological exploration. This device utilizes rotary cutting to enlarge soil pores, exhibiting low energy consumption and thus achieving energy-efficient borehole enlargement. Furthermore, by employing hydraulic technology, the device can control the distance between the rotary cutting blade and the rotation axis, enabling borehole enlargement for different radii and improving the device's applicability in terms of rotary cutting radius, thereby solving the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving borehole enlargement construction device for coal mine geological exploration, comprising a rotary drilling mechanism, which internally includes a rotatable and hollow triangular rotating body, multiple first piston bodies placed inside the triangular rotating body and capable of horizontal movement, a rotary cutting blade located outside the triangular rotating body and capable of horizontal movement with the first piston bodies, and a helical spring capable of cooperating with liquid pressure to keep the rotary cutting blade in a stationary state; and a combined drive mechanism, which internally includes a drive motor capable of longitudinal movement and generating a driving effect, a longitudinal rotating shaft connected to the rotor of the drive motor and capable of driving the triangular rotating body to rotate, and a fixed sleeve installed outside the shaft of the longitudinal rotating shaft through bearings and a sealing ring and capable of transmitting liquid into the triangular rotating body.

[0007] Preferably, the rotary drilling mechanism includes a longitudinal liquid pre-reserved cavity disposed inside the triangular rotating body. The triangular rotating body has multiple horizontal component movable cavities located outside the longitudinal liquid pre-reserved cavity. The horizontal component movable cavities and the longitudinal liquid pre-reserved cavity are connected by a first liquid flow hole. The triangular rotating body has a second liquid flow hole connecting the space above it and the top of the longitudinal liquid pre-reserved cavity. The triangular rotating body has a first rod through-hole connecting the external space and one end of the horizontal component movable cavity. A first piston body capable of moving axially along the horizontal component movable cavity is placed inside each of the horizontal component movable cavities. A horizontal telescopic rod passing through the first rod through-hole is fixedly installed at the end of the first piston body facing the first rod through-hole. A compressed helical spring is sleeved around the rod body located inside the horizontal component movable cavity. A rotary cutting blade is fixedly installed at the ends of every two symmetrically positioned horizontal telescopic rods.

[0008] Preferably, the middle part of the rotary cutting blade is a longitudinal straight bar structure, the top and bottom ends are oblique bar structures with the ends close to the longitudinal center line of the triangular rotating body, and both sides of the rotary cutting blade are provided with a pointed structure.

[0009] Preferably, the structural shape of the perforated cross section of the first rod is consistent with the structural shape of the cross section of the horizontal telescopic rod, both being polygonal structures, and the structural dimensions of the perforated cross section of the first rod match the structural dimensions of the cross section of the horizontal telescopic rod.

[0010] Preferably, the combined drive mechanism includes a motor mounting housing for fixing the drive motor. A hollow ring is fixedly mounted on the periphery of the motor mounting housing. A longitudinal shaft is fixedly mounted on the bottom end of the rotor of the drive motor via a coupling. The bottom end of the longitudinal shaft is fixedly mounted at the top center of the triangular rotating body via a bottom connecting plate. The interior of the longitudinal shaft is provided with a No. 5 liquid flow hole, the bottom end of which connects to the No. 2 liquid flow hole. The interior of the hollow ring is provided with an annular liquid flow cavity. The bottom surface of the hollow ring is provided with a concave rod fixing groove. The fixed groove and the annular liquid flow cavity are connected by a No. 3 liquid flow hole. The upper surface of the hollow ring is provided with a No. 1 liquid docking channel that is integral with it and connects to the annular liquid flow cavity. The longitudinal rotating shaft is equipped with a fixed sleeve that can rotate relative to it by means of bearings and sealing rings on its outer periphery near its top. The fixed sleeve is provided with an annular liquid reserved cavity inside. The outer circumference of the fixed sleeve is provided with a No. 2 liquid docking channel that is integral with it and connects to the annular liquid reserved cavity. The longitudinal rotating shaft is provided with a No. 4 liquid flow hole that connects the annular liquid reserved cavity and the No. 5 liquid flow hole.

[0011] Preferably, during operation, the first liquid docking channel is connected to a liquid circuit of the hydraulic system via a hydraulic pipe, and the hydraulic system needs to have the function of controlling the liquid flow rate and the liquid flow direction.

[0012] Preferably, another fluid circuit of the hydraulic system is connected to the second fluid docking channel via a hydraulic pipe.

[0013] Preferably, it also includes multiple longitudinal telescopic mechanisms, each having a hollow support rod that provides longitudinal support and has a hollow internal structure, a second piston body placed inside the hollow support rod and capable of moving upward under liquid pressure, and a longitudinal telescopic rod that moves with the second piston body and drives the hollow ring body to move.

[0014] Preferably, the longitudinal telescopic mechanism includes a bottom fixed base disposed at the bottom end of the hollow support rod. The hollow support rod has a longitudinal component movable cavity inside. The top end of the hollow support rod has a second rod body through hole that connects to the external space and the top end of the longitudinal component movable cavity. A second piston body capable of moving axially along the longitudinal component movable cavity is placed inside the hollow support rod located in the longitudinal component movable cavity. A longitudinal telescopic rod integrally formed with the second piston body and passing through the second rod body through hole is disposed on the upper surface of the second piston body. The top end of the longitudinal telescopic rod is fixedly installed inside the rod body fixing groove. A sixth liquid flow hole is disposed inside the longitudinal telescopic rod and the second piston body, connecting the space below the second piston body and the bottom end of the third liquid flow hole.

[0015] Preferably, the structural shape of the perforated cross section of the second rod is consistent with the structural shape of the cross section of the longitudinal telescopic rod, both being polygonal structures, and the structural dimensions of the perforated cross section of the second rod match the structural dimensions of the cross section of the longitudinal telescopic rod.

[0016] Compared with the prior art, the present invention provides an energy-saving borehole enlargement construction device for coal mine geological exploration, which has the following beneficial effects:

[0017] This device enlarges soil pores using a rotary cutting method, which features low energy consumption, thus achieving energy-saving pore enlargement. In addition, the device utilizes hydraulic technology to control the distance between the rotary cutting blade and the rotation axis, thereby enabling pore enlargement for different pore radii and improving the applicability of the equipment in terms of rotary cutting radius. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a three-dimensional cross-sectional view of the present invention;

[0020] Figure 3 This is a perspective view of the rotary drilling mechanism in this invention;

[0021] Figure 4 This is a three-dimensional cross-sectional view of the rotary drilling mechanism in this invention;

[0022] Figure 5 This is a perspective view of the combined drive mechanism in this invention;

[0023] Figure 6 This is a three-dimensional cross-sectional view of the combined drive mechanism in this invention;

[0024] Figure 7 This is a perspective cross-sectional view of the fixed sleeve portion of the present invention;

[0025] Figure 8 This is a three-dimensional cross-sectional view of the longitudinal telescopic mechanism in this invention.

[0026] The components include: 1. Rotary drilling mechanism; 11. Triangular rotating body; 12. Longitudinal liquid reserved cavity; 13. No. 1 liquid flow hole; 14. Horizontal component movable cavity; 15. No. 1 rod through hole; 16. No. 1 piston body; 17. Horizontal telescopic rod; 18. Rotary cutting blade; 19. No. 2 liquid flow hole; 110. Helical spring; 2. Combined drive mechanism; 21. Motor fixing housing; 22. Drive motor; 23. Rotor; 24. Coupling; 25. Longitudinal rotating shaft; 26. Bottom connecting plate; 27. Annular liquid flow... 28. Liquid docking channel 1; 29. ​​Liquid flow hole 3; 210. Rod fixing groove; 211. Fixing sleeve; 212. Annular liquid reserved cavity; 213. Liquid docking channel 2; 214. Liquid flow hole 4; 215. Liquid flow hole 5; 216. Hollow ring; 3. Longitudinal telescopic mechanism; 31. Hollow support rod; 32. Bottom fixed base; 33. Longitudinal component movable cavity; 34. Rod through hole 2; 35. Piston body 2; 36. Longitudinal telescopic rod; 37. Liquid flow hole 6. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1 and Figure 2 An energy-saving borehole enlargement construction device for coal mine geological exploration is described. The first liquid docking channel 28 is connected to a liquid circuit of a hydraulic system through a hydraulic pipe. The hydraulic system needs to have the function of controlling the liquid flow rate and direction. Then, the other liquid circuit of the hydraulic system is connected to the second liquid docking channel 213 through a hydraulic pipe. Finally, the bottom fixed base 32 is fixedly installed on the surface of the mobile device. The device is moved to the vicinity of the ground hole by the mobile device, so that the rotary drilling mechanism 1 is located directly above the hole.

[0029] To improve the applicability of the equipment in terms of cutting radius, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4A rotary drilling mechanism 1 is required, which includes a rotatable, hollow triangular rotating body 11, multiple horizontally movable piston bodies 16 housed within the triangular rotating body 11, rotary cutting blades 18 located outside the triangular rotating body 11 and moving horizontally with the piston bodies 16, and a helical spring 110 that works with the hydraulic pressure to keep the rotary cutting blades 18 stationary. A fixed amount of hydraulic oil is injected into the longitudinal hydraulic pre-reserved chamber 12 via a hydraulic system. The hydraulic oil enters the movable chambers 14 of each horizontal component through the hydraulic flow holes 13. Under the action of liquid pressure, the first piston body 16 will compress the helical spring 110, thereby causing the rotary cutting blade 18 to move away from the longitudinal center line of the triangular rotating body 11. Under the interaction force of liquid pressure and helical spring 110, the rotary cutting blade 18 will eventually be held, thereby adjusting the hole enlargement radius of the rotary cutting blade 18. When the triangular rotating body 11 rotates, it will drive each rotary cutting blade 18 to rotate. When the rotary cutting blade 18 rotates and contacts the soil near the hole, it will perform a rotary cutting effect on the soil. The downward moving rotary cutting blade 18 will perform rotary cutting on the soil on the entire inner wall of the hole, thereby achieving hole enlargement.

[0030] For details regarding the specific structure of the rotary drilling mechanism 1, please refer to [link / reference]. Figure 3 and Figure 4The system includes a longitudinal liquid reserve cavity 12 disposed inside a triangular rotating body 11. The triangular rotating body 11 has multiple horizontal component movable cavities 14 located outside the longitudinal liquid reserve cavity 12. The horizontal component movable cavities 14 and the longitudinal liquid reserve cavity 12 are connected by a first liquid flow hole 13. The triangular rotating body 11 has a second liquid flow hole 19 connecting the space above it and the top of the longitudinal liquid reserve cavity 12. The triangular rotating body 11 also has a first rod through hole 15 connecting the external space and one end of the horizontal component movable cavity 14. A first piston body 16 capable of moving axially along the horizontal component movable cavity 14 is placed inside each of the horizontal component movable cavities 14. The first piston body 16 faces the first... A horizontal telescopic rod 17 is fixedly installed at one end of the rod through the first ...

[0031] To achieve the desired driving effect on the rotary cutting blade 18, please refer to... Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 A combined drive mechanism 2 needs to be set up, which contains a drive motor 22 that can move longitudinally and generate a driving effect, a longitudinal shaft 25 connected to the rotor 23 of the drive motor 22 and capable of driving the triangular rotating body 11 to rotate, and a fixed sleeve 211 installed on the outside of the shaft of the longitudinal shaft 25 through bearings and sealing rings and capable of transmitting liquid into the triangular rotating body 11. When the drive motor 22 is started, the rotor 23 will drive the triangular rotating body 11 to rotate through the longitudinal shaft 25, so that the rotary cutting blade 18 can rotary cut the soil. At the same time, the hydraulic system is started, and the liquid will enter the annular liquid reserved cavity 212 through the second liquid docking channel 213. The hydraulic oil will enter the longitudinal liquid reserved cavity 12 in sequence through the annular liquid reserved cavity 212, the fourth liquid flow hole 214, the fifth liquid flow hole 215 and the second liquid flow hole 19, realizing the horizontal driving function of the rotary cutting blade 18.

[0032] For details regarding the specific structure of the combined drive mechanism 2, please refer to [link / reference]. Figure 5 , Figure 6 and Figure 7 The system includes a motor mounting housing 21 for fixing a drive motor 22. A hollow ring 216 is fixedly mounted on the periphery of the motor mounting housing 21. A longitudinal rotating shaft 25 is fixedly mounted on the bottom end of the rotor 23 of the drive motor 22 via a coupling 24. The bottom end of the longitudinal rotating shaft 25 is fixedly mounted at the center of the top of the triangular rotating body 11 via a bottom connecting plate 26. The interior of the longitudinal rotating shaft 25 is provided with a fifth liquid flow hole 215 whose bottom end connects to a second liquid flow hole 19. The interior of the hollow ring 216 is provided with an annular liquid flow cavity 27. The bottom surface of the hollow ring 216 is provided with a concave rod fixing groove 210. The rod fixing groove 210 and the annular liquid flow cavity 27 are connected via a third liquid flow hole 29. The upper surface of the hollow ring 216 is provided with an integral structure and connected to it. The annular liquid flow chamber 27 has a first liquid docking channel 28. The longitudinal rotating shaft 25 has a fixed sleeve 211 that can rotate relative to it installed on its outer periphery near its top via bearings and a sealing ring. The fixed sleeve 211 has an annular liquid reserved cavity 212 inside. The outer circumference of the fixed sleeve 211 has a second liquid docking channel 213 that is integral with it and communicates with the annular liquid reserved cavity 212. The longitudinal rotating shaft 25 has a fourth liquid flow hole 214 that communicates with the annular liquid reserved cavity 212 and the fifth liquid flow hole 215. During operation, the first liquid docking channel 28 is connected to a liquid circuit of the hydraulic system through a hydraulic pipe. The hydraulic system needs to have the function of controlling the liquid flow rate and liquid flow direction. The other liquid circuit of the hydraulic system is connected to the second liquid docking channel 213 through a hydraulic pipe.

[0033] To achieve the longitudinal drive function of the rotary cutting blade 18, please refer to... Figure 1 , Figure 2 and Figure 8Multiple longitudinal telescopic mechanisms 3 need to be set up. Each mechanism contains a hollow support rod 31 that provides longitudinal support, a second piston body 35 placed inside the hollow support rod 31 and capable of upward movement under liquid pressure, and a longitudinal telescopic rod 36 that moves with the second piston body 35 and drives the hollow ring body 216. This allows the liquid system to control the injection of hydraulic oil into the first liquid docking channel 28. The liquid then sequentially enters the space below the second piston body 35 through the annular liquid flow chamber 27, the third liquid flow hole 29, and the sixth liquid flow hole 37. Under liquid pressure, the second piston body 35 moves upward, allowing the rotary cutting blade 18 to be removed from the hole. When the rotary cutting blade 18 needs to be expanded downwards, the hydraulic system controls the flow of hydraulic oil back into the hydraulic system from below the second piston body 35. Under the weight of the equipment, the second piston body 35 slowly moves downwards, allowing the rotary cutting blade 18 to expand downwards.

[0034] For details regarding the specific structure of the longitudinal telescopic mechanism 3, please refer to [link / reference]. Figure 8 The system includes a bottom fixing base 32 located at the bottom end of a hollow support rod 31. The hollow support rod 31 has a longitudinal component movable cavity 33 inside. The top end of the hollow support rod 31 has a second rod through-hole 34 connecting the external space and the top end of the longitudinal component movable cavity 33. A second piston body 35, capable of moving axially along the longitudinal component movable cavity 33, is placed inside the hollow support rod 31 within the longitudinal component movable cavity 33. The upper surface of the second piston body 35 has a longitudinal through-hole 34 that is integrally formed with it. The top end of the longitudinal telescopic rod 36 is fixedly installed inside the rod fixing groove 210. The longitudinal telescopic rod 36 and the second piston body 35 are provided with a sixth liquid flow hole 37 that connects the space below the second piston body 35 and the bottom end of the third liquid flow hole 29. The cross-sectional shape of the second rod through hole 34 is consistent with the cross-sectional shape of the longitudinal telescopic rod 36, both being polygonal structures. Furthermore, the cross-sectional dimensions of the second rod through hole 34 match the cross-sectional dimensions of the longitudinal telescopic rod 36.

[0035] In use, the first liquid docking channel 28 is connected to a liquid circuit of the hydraulic system via a hydraulic pipe. This hydraulic system needs to have the function of controlling the liquid flow rate and direction. Then, the other liquid circuit of the hydraulic system is connected to the second liquid docking channel 213 via a hydraulic pipe. Finally, the bottom fixed base 32 is fixedly installed on the surface of the mobile device. The device is moved to the vicinity of the ground opening by the mobile device, with the rotary drilling mechanism 1 positioned directly above the opening. The hydraulic system is then activated, and the liquid enters the annular liquid reserved cavity 212 through the second liquid docking channel 213. The hydraulic oil then sequentially enters the longitudinal liquid reserved cavity 12 through the annular liquid reserved cavity 212, the fourth liquid flow hole 214, the fifth liquid flow hole 215, and the second liquid flow hole 19. Hydraulic oil enters the interior of the moving chambers 14 of each horizontal component through the first liquid flow hole 13. Under the action of liquid pressure, the first piston body 16 compresses the helical spring 110, thereby causing the rotary cutting blade 18 to move away from the longitudinal centerline of the triangular rotating body 11. Under the interaction force of liquid pressure and helical spring 110, the rotary cutting blade 18 is finally held, thereby adjusting the hole enlargement radius of the rotary cutting blade 18. The drive motor 22 is started, and the rotor 23 drives the triangular rotating body 11 to rotate through the longitudinal rotating shaft 25. When the triangular rotating body 11 rotates, it drives each rotary cutting blade 18 to rotate. When the rotary cutting blade 18 rotates and contacts the soil near the hole, it will perform a rotary cutting effect on the soil. The downward moving rotary cutting blade 18 will perform rotary cutting on the soil on the entire inner wall of the hole, thereby achieving hole enlargement.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving borehole enlargement construction device for coal mine geological exploration, characterized in that: include, The rotary drilling mechanism (1) is provided with a rotatable and hollow triangular rotating body (11), multiple first piston bodies (16) placed inside the triangular rotating body (11) and capable of horizontal movement, a rotary cutting blade (18) located outside the triangular rotating body (11) and capable of horizontal movement with the first piston body (16), and a helical spring (110) that can cooperate with the liquid pressure to keep the rotary cutting blade (18) in a stationary state. And a combined drive mechanism (2), which is provided with a drive motor (22) that can move longitudinally and generate a driving effect, a longitudinal shaft (25) connected to the rotor (23) of the drive motor (22) and capable of driving the triangular rotating body (11) to rotate, and a fixed sleeve (211) installed on the outside of the shaft of the longitudinal shaft (25) through bearings and sealing rings and capable of transmitting liquid to the inside of the triangular rotating body (11). The rotary drilling mechanism (1) includes a longitudinal liquid reserve cavity (12) disposed inside a triangular rotating body (11). The triangular rotating body (11) has multiple horizontal component movable cavities (14) located outside the longitudinal liquid reserve cavity (12). The horizontal component movable cavities (14) and the longitudinal liquid reserve cavity (12) are connected by a first liquid flow hole (13). The triangular rotating body (11) has a second liquid flow hole (19) connecting the space above it and the top of the longitudinal liquid reserve cavity (12). The triangular rotating body (11) also has a first liquid flow hole (19) connecting the external space and one end of the horizontal component movable cavity (14). A first piston (16) capable of moving axially along the horizontal component movable cavity (14) is placed inside the first piston (16) located in the movable cavity (14) of each horizontal component. A horizontal telescopic rod (17) passing through the first rod ...

2. The energy-saving borehole enlargement device for coal mine geological exploration according to claim 1, characterized in that: The rotary cutting blade (18) has a longitudinal straight bar structure in the middle, and oblique bar structures at the top and bottom ends that are close to the longitudinal center line of the triangular rotating body (11). Both sides of the rotary cutting blade (18) are provided with a pointed structure.

3. The energy-saving borehole enlargement construction device for coal mine geological exploration according to claim 2, characterized in that: The cross-sectional shape of the first rod through hole (15) is consistent with the cross-sectional shape of the horizontal telescopic rod (17), both being polygonal structures, and the structural dimensions of the cross-sectional shape of the first rod through hole (15) match the structural dimensions of the cross-sectional shape of the horizontal telescopic rod (17).

4. The energy-saving borehole enlargement device for coal mine geological exploration according to claim 3, characterized in that: The combined drive mechanism (2) includes a motor mounting housing (21) for fixing the drive motor (22). A hollow ring (216) is fixedly mounted on the periphery of the motor mounting housing (21). A longitudinal rotating shaft (25) is fixedly mounted on the bottom end of the rotor (23) of the drive motor (22) through a coupling (24). The bottom end of the longitudinal rotating shaft (25) is fixedly mounted at the top center of the triangular rotating body (11) through a bottom connecting plate (26). The interior of the longitudinal rotating shaft (25) is provided with a fifth liquid flow hole (215) whose bottom end connects to the second liquid flow hole (19). The interior of the hollow ring (216) is provided with an annular liquid flow cavity (27). The bottom surface of the hollow ring (216) is provided with a concave rod fixing groove (210). The groove (210) and the annular liquid flow cavity (27) are connected by a third liquid flow hole (29). The upper surface of the hollow ring (216) is provided with a first liquid docking channel (28) that is integral with it and connects to the annular liquid flow cavity (27). The longitudinal rotating shaft (25) is equipped with a fixed sleeve (211) that can rotate relative to it by bearings and sealing rings on its outer periphery near its top. The fixed sleeve (211) is provided with an annular liquid reserved cavity (212). The outer circumferential surface of the fixed sleeve (211) is provided with a second liquid docking channel (213) that is integral with it and connects to the annular liquid reserved cavity (212). The longitudinal rotating shaft (25) is provided with a fourth liquid flow hole (214) that connects the annular liquid reserved cavity (212) and the fifth liquid flow hole (215).

5. The energy-saving borehole enlargement device for coal mine geological exploration according to claim 4, characterized in that: During operation, the No. 1 liquid docking channel (28) is connected to a liquid circuit of the hydraulic system through a hydraulic pipe, and the hydraulic system needs to have the function of controlling the liquid flow rate and the liquid flow direction.

6. The energy-saving borehole enlargement device for coal mine geological exploration according to claim 5, characterized in that: Another fluid circuit of the hydraulic system is connected to the second fluid docking channel (213) via a hydraulic pipe.

7. The energy-saving borehole enlargement device for coal mine geological exploration according to claim 6, characterized in that: It also includes multiple longitudinal telescopic mechanisms (3), which are provided with a hollow support rod (31) that provides longitudinal support and has a hollow internal structure, a second piston body (35) placed inside the hollow support rod (31) and capable of moving upward under liquid pressure, and a longitudinal telescopic rod (36) that can move with the second piston body (35) and drive the hollow ring body (216) to move.

8. The energy-saving borehole enlargement device for coal mine geological exploration according to claim 7, characterized in that: The longitudinal telescopic mechanism (3) includes a bottom fixed base (32) disposed at the bottom end of the hollow support rod (31). The hollow support rod (31) has a longitudinal component movable cavity (33) inside. The top end of the hollow support rod (31) has a second rod body through hole (34) that connects the external space and the top end of the longitudinal component movable cavity (33). The hollow support rod (31) has a second piston body (35) that can move axially along the longitudinal component movable cavity (33) inside the longitudinal component movable cavity (33). The upper surface of the second piston body (35) is provided with a longitudinal telescopic rod (36) that is integral with it and passes through the second rod body through hole (34). The top end of the longitudinal telescopic rod (36) is fixedly installed inside the rod body fixing groove (210). The interior of the longitudinal telescopic rod (36) and the second piston body (35) has a sixth liquid flow hole (37) that connects the space below the second piston body (35) and the bottom end of the third liquid flow hole (29).

9. The energy-saving borehole enlargement device for coal mine geological exploration according to claim 8, characterized in that: The cross-sectional shape of the perforation (34) of the second rod is consistent with the cross-sectional shape of the longitudinal telescopic rod (36), both being polygonal structures, and the structural dimensions of the cross-sectional shape of the perforation (34) of the second rod are matched with the structural dimensions of the cross-sectional shape of the longitudinal telescopic rod (36).

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