Controllable impact rotary drilling test platform based on bidirectional electromagnetic action

Abstract

The invention discloses a controllable impact rotary drilling test platform based on a bidirectional electromagnetic effect, and belongs to the technical field of drilling tests. The device comprises a supporting and pressurizing assembly, an electromagnetic impact assembly, a rotation assembly, a rock sample clamping assembly and a data acquisition assembly, the supporting and pressurizing assembly is used for driving the electromagnetic impact assembly to do reciprocating motion in the axial direction and applying controllable bit pressure; the electromagnetic impact assembly is connected with the supporting and pressurizing assembly and used for transmitting an impact load generated by electromagnetic actuation to the working face of the drill bit; the rotary assembly is used for driving the drill bit to rotate; the rock sample clamping assembly is used for fixing a test rock sample; the data acquisition assembly is used for monitoring and recording key experimental parameters such as displacement, bit pressure and rotating speed in real time; on the basis of realizing the function of the impact rotary drilling experiment, multiple drilling parameters such as the impact frequency, the impact energy, the bit pressure and the rotating speed can be accurately regulated and controlled, and the device has important significance for deeply researching the impact rotary rock crushing mechanism under multiple working conditions.

Description

Technical Field

[0001] The present invention belongs to the technical field of drilling tests. Specifically, it relates to a controllable impact rotary drilling test platform based on bidirectional electromagnetic action. Background Art

[0002] The impact rotary drilling test platform is an important experimental device for simulating and studying impact rotary drilling technology. Its main functions are to optimize drilling process parameters, test the performance of drill tools, and deeply study the rock-breaking mechanism of impact rotary drilling, etc., which has great theoretical and practical significance.

[0003] Currently, the number of existing impact rotary drilling test platforms at home and abroad is small. Moreover, the existing test platforms not only have the problem of single function, but also it is difficult to accurately adjust multiple drilling parameters simultaneously.

[0004] For example, the Chinese patent with the application number 202121890243.9, which is "a large-diameter impact rotary drilling experimental platform for constructing a rescue passage". This experimental platform can obtain the drilling efficiency data of drill tools in different strata, but it cannot adjust the drilling parameters.

[0005] Another Chinese patent with the application number 202122939475.5, which is "an impact rotary integrated power head". This technical solution can simultaneously realize the drilling process of impact and rotation, but the drilling parameters such as impact work and impact frequency still cannot be accurately adjusted.

[0006] The Chinese patent with the application number 202311340279.3, which is "an impact rotary micro-drilling experiment with controllable energy and frequency", solves the problem of simultaneous regulation of impact work and impact frequency. However, its mechanical impact component has significant limitations, such as complex structure, poor controllability, and discontinuous adjustment of impact frequency.

[0007] Generally speaking, the existing impact rotary drilling test platforms do not have the function of simultaneously adjusting drilling parameters such as impact work, impact frequency, rotation speed, and drilling pressure. And these functions play a key role in studying the mechanism of impact rotary rock breaking. Therefore, it is of great significance to invent an impact rotary drilling test platform with the function of simultaneously and accurately regulating impact work and impact frequency. Summary of the Invention

[0008] Aiming at the above problems existing in the prior art, the purpose of the present invention is to provide a controllable impact rotary drilling test platform based on bidirectional electromagnetic action, which is mainly used for impact rotary drilling experiments with simultaneous and accurate regulation of impact frequency and impact work, and has the advantages of simple structure, strong controllability, and stepless regulation of impact frequency.

[0009] A controllable impact rotary drilling test platform based on bidirectional electromagnetic action, comprising a support and pressure application assembly, an electromagnetic impact assembly, a rotary assembly, a rock sample clamping assembly and a data acquisition assembly;

[0010] The support and pressure application assembly is of a frame structure. The electromagnetic impact assembly is arranged inside the support and pressure application assembly, and the support and pressure application assembly can control the electromagnetic impact assembly to move in the vertical direction;

[0011] The rotary assembly is arranged on the support and pressure application assembly on the lower side of the electromagnetic impact assembly. The rotary assembly is connected to the electromagnetic impact assembly and can make the electromagnetic impact assembly rotate;

[0012] The rock sample clamping assembly is arranged at the bottom of the electromagnetic impact assembly, and the data acquisition assembly is arranged on the support and pressure application assembly and the electromagnetic impact assembly.

[0013] Further, the support and pressure application assembly includes a first support frame, a second support frame, a base, a first lifting frame, a second lifting frame, a slider bearing unit, a first pneumatic cylinder and a second pneumatic cylinder;

[0014] Both the first support frame and the second support frame are of rectangular frame structures. The size of the second support frame is smaller than that of the first support frame and it is arranged inside the first support frame. The first lifting frame and the second lifting frame are slidably connected inside the frame of the second support frame through the slider bearing unit. Cross beams are arranged on the left and right sides of the second support frame, and a first pneumatic cylinder and a second pneumatic cylinder are respectively arranged on the cross beams. The output ends of the two pneumatic cylinders are jointly connected to the first lifting frame.

[0015] Further, the electromagnetic impact assembly includes an electromagnetic frame and an impact assembly. The electromagnetic frame includes a fine-thread screw, an upper end cover and a lower end cover. The fine-thread screws are arranged in a circular array and are multiple in number. The top of the fine-thread screws passes through the first lifting frame and is fixedly connected thereto. Two groups of upper end covers and lower end covers are fixedly arranged by the multiple fine-thread screws. Electromagnetic coils are arranged between each group of upper end covers and lower end covers. A coil protection cover is sleeved outside the electromagnetic coils. Through holes with the same position and size are arranged between the upper end cover and the lower end cover;

[0016] The impact assembly includes an iron core and a button bit. The iron core is of a cylindrical structure. The iron core passes through multiple through holes and is arranged inside the electromagnetic frame. A wear-resistant sleeve is movably sleeved outside the iron core. The wear-resistant sleeve is fixedly arranged at the central position of the second lifting frame. A harmonic reducer is arranged on one side of the wear-resistant sleeve close to the iron core. An annular pressure sensor is arranged on the second lifting frame. A bearing seat is arranged on the side of the pressure sensor far from the electromagnetic frame. The iron core is in contact with the impact piston. A button bit is detachably and fixedly connected to the side of the bearing seat far from the iron core.

[0017] Furthermore, the rotary assembly includes a motor and a transmission belt, and the motor is transmission-connected to an outer tube fixedly connected to the ball-tooth drill bit via the transmission belt.

[0018] Further, the rock sample clamping assembly includes a rock box, a rock sample fixing member, and a valve;

[0019] The rock box is a rectangular cavity structure with an open upper end. Two groups of rock sample fixings are fixedly installed inside the rock box. The rock sample fixings include columns and pressure plates. The columns are fixedly arranged at the bottom of the rock box. The columns are connected to each other through pressure plates. A valve is installed on the left rear side of the rock box.

[0020] Further, the data acquisition component includes a displacement sensor plate and a displacement sensor;

[0021] The displacement sensor plate is rigidly connected to the second pneumatic cylinder, and the displacement sensor is fixedly connected to the displacement sensor plate.

[0022] Furthermore, the end of the bearing seat away from the iron core is fixedly connected to an outer tube, the end of the outer tube close to the iron core is connected to an impact piston through a keyway, the impact piston extends to the inside of the bearing seat and does not contact the bearing seat, the iron core can contact the impact piston, the end of the outer tube away from the bearing seat is threadedly connected to the ball tooth drill bit, and the end of the ball tooth drill bit close to the outer tube is provided with a semicircular retaining ring and a spline sleeve and extends to the inside of the outer tube.

[0023] Furthermore, a pad is provided at the bottom of the first lifting frame corresponding to the position of the iron core.

[0024] Furthermore, the upper end cover, the lower end cover and the coil protection cover are all made of materials that can isolate electromagnetic field interference.

[0025] Compared with the prior art, the present invention fills the gap that the impact rotary drilling test platform lacks the experimental function of simultaneously and precisely controlling the impact power and impact frequency. This scheme is also equipped with a data acquisition and control system. On the basis of realizing the impact rotary micro-drilling experimental function, it can precisely control multiple drilling parameters such as impact frequency, impact power, drilling pressure and rotation speed. It has a simple structure, strong controllability and stepless control of impact frequency. It is of great significance for in-depth research on the impact rotary rock crushing mechanism under multiple working conditions and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a front view of the present invention;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the support and pressurizing assembly of the present invention;

[0029] Figure 4 Top view of the first lifting frame of the present invention;

[0030] Figure 5 Front view of the axial movement of the support and pressurization assembly of the present invention;

[0031] Figure 6 Front view of the first lifting frame of the present invention;

[0032] Figure 7 Front view of the upper side of section A of the electromagnetic impact assembly of the present invention;

[0033] Figure 8 Front view of the lower side of section A of the electromagnetic impact assembly of the present invention;

[0034] Figure 9 Front view of the bearing seat of the present invention;

[0035] Figure 10 Schematic three-dimensional structure diagram of the slewing assembly of the present invention;

[0036] Figure 11 Schematic three-dimensional diagram of the rock sample clamping assembly of the present invention;

[0037] In the figure: 1, support and pressurization assembly; 2, electromagnetic impact assembly; 3, slewing assembly; 4, rock sample clamping assembly;

[0038] 101, first support frame; 102, second support frame; 103, base; 104, first lifting frame; 10401, central hole; 105, second lifting frame; 106, slider bearing unit; 107, first pneumatic cylinder; 108, second pneumatic cylinder; 109, roller;

[0039] 201, backing plate; 202, fine-thread screw; 203, first electromagnetic coil; 204, second electromagnetic coil; 205, coil protection cover; 206, iron core; 207, upper end cover; 208, lower end cover; 209, harmonic reducer; 210, wear-resistant sleeve; 211, impact piston; 212, deep groove ball bearing; 213, bearing retaining sleeve; 214, thrust bearing; 215, bearing seat; 216, annular ring; 217, outer tube; 218, semi-circular snap ring; 219, spline sleeve; 220, button bit;

[0040] 301, motor; 302, driving wheel; 303, conveyor belt; 304, driven wheel;

[0041] 401, rock box; 402, rock sample fixing member; 40201, column; 40202, pressing plate; 40203, nut; 403, rock sample; 404, valve;

[0042] 501. Pressure sensor; 502. Displacement sensor board; 503. Displacement sensor. Detailed implementation

[0043] The present invention will be further described below in conjunction with specific embodiments.

[0044] The present invention mainly includes a support and pressurization assembly 1, an electromagnetic impact assembly 2, a rotary assembly 3, a rock sample clamping assembly 4, and a data acquisition assembly. The support and pressurization assembly 1 is a frame structure, the electromagnetic impact assembly 2 is disposed inside the support and pressurization assembly 1, and the support and pressurization assembly 1 can control the electromagnetic impact assembly 2 to move in the vertical direction;

[0045] The rotary assembly 3 is disposed on the support and pressurization assembly 1 on the lower side of the electromagnetic impact assembly 2, and the rotary assembly 3 is connected to the electromagnetic impact assembly 2 and can cause the electromagnetic impact assembly 2 to rotate;

[0046] The rock sample clamping assembly 4 is disposed at the bottom of the electromagnetic impact assembly 2, and the data acquisition assembly 5 is disposed on the support and pressurization assembly 1 and the electromagnetic impact assembly 2.

[0047] In addition to the above components, an external control panel and a circuit system for uniformly driving the above components are provided. The software and circuit of the control panel adopt the design schemes in the prior art, so they will not be elaborated here. The main function of the control panel is to control devices such as cylinders, electromagnetic coils, and motors 301 according to the actions actually required by the components.

[0048] As Figures 1 to 5 shown, the support and pressurization assembly 1 includes a first support frame 101, a second support frame 102, a base 103, a first lifting frame 104, a second lifting frame 105, a slider bearing unit 106, a first air cylinder 107, a second air cylinder 108, rollers 109, and a central hole 10401, and its function is to drive the electromagnetic impact assembly 2 to move axially and apply a controllable drilling pressure.

[0049] As Figure 3 、 Figure 4 shown, the first support frame 101, the second support frame 102, and the base 103 are all centrally symmetric rectangular steel frames. The size of the second support frame 102 is smaller than that of the first support frame 101 and is disposed inside the first support frame 101 and fixed by welding to ensure the stability of the device during the experiment. The base 103 is disposed below the first support frame 101, and rollers 109 are provided below the base 103 to facilitate the free movement of the experimental table.

[0050] Above the interior of the second support frame 102, a first lifting frame 104 is provided. Below the interior of the second support frame 102, a second support frame 105 is provided. The first lifting frame 104 is a centrally symmetric steel frame, and the second lifting frame 105 is an irregular-shaped steel frame. Moreover, the sizes of both lifting frames are slightly smaller than the rectangular steel frame structure formed by the second support frame 105. Both are arranged inside the four vertically oriented steel frames of the second support frame 105. And the steel frame sides of the four steel frames of the second support frame 105 facing the two lifting frames all serve as slideways. A set of slider bearing units 106 are respectively configured at the four top corners of the two lifting frames. The lifting frames can achieve synchronous axial movement along the slideways through the slider bearing units 106.

[0051] A central hole 10401 for installing the backing plate 201 is provided at the central position of the first lifting frame 104. The backing plate 201 is positioned through the central hole 10401 and installed at the bottom of the first lifting frame 104.

[0052] Crossbeams are provided on the left and right sides of the second support frame 102. A first air cylinder 107 and a second air cylinder 108 are respectively provided on the crossbeams. The output ends of the two air cylinders are jointly connected to the upper first lifting frame 104. The air ports of the first air cylinder 107 and the second air cylinder 108 are both connected to an air compressor through rigid pipes. The two air cylinders cooperate to drive, realizing precise control of the axial displacement of the support pressing assembly 1 and dynamic adjustment of the drilling pressure.

[0053] As Figures 6 to 9 shown, the electromagnetic impact assembly 2 includes an electromagnetic frame and an impact assembly. The electromagnetic frame includes a fine-thread screw 202, an upper end cover 207, and a lower end cover 208. Multiple fine-thread screws 202 are arranged in a circular array. In this embodiment, the number of fine-thread screws 202 is three. The top of the fine-thread screw 202 passes through the first lifting frame 104 and is fixedly connected thereto. The bottom of the fine-thread screw 202 passes through the second lifting frame 105 and is fixedly connected thereto. Two sets of upper end covers 207 and lower end covers 208 are fixedly arranged together with multiple fine-thread screws 202. A first electromagnetic coil 203 and a second electromagnetic coil 204 are respectively arranged between each set of upper end covers 207 and lower end covers 208. A coil protection cover 205 is sleeved outside the two electromagnetic coils. The upper end cover 207, the lower end cover 208, and the coil protection cover 205 are all made of materials that can isolate electromagnetic field interference, and can effectively isolate the interference of other electromagnetic fields. Through holes with the same position and size are provided between the upper end cover 207 and the lower end cover 208;

[0054] The impact component includes an iron core 206 and a button bit 220. The iron core 206 is of a cylindrical structure. The iron core 206 is arranged inside the electromagnetic frame through a plurality of through holes. An abrasion-resistant sleeve 210 is movably sleeved outside the iron core 206. The abrasion-resistant sleeve 210 is fixedly arranged at the central position of the second lifting frame 105. A harmonic reducer 209 is arranged on one side of the abrasion-resistant sleeve 210 close to the iron core 206. An annular pressure sensor 501 is arranged on the second lifting frame 105. A bearing seat 215 is arranged on one side of the pressure sensor 501 away from the electromagnetic frame. The iron core 206 is in contact with the impact piston 211. A button bit 220 is detachably and fixedly connected to one side of the bearing seat 215 away from the iron core 206.

[0055] One end of the bearing seat 215 away from the iron core 206 is fixedly connected with an outer tube 217. One end of the outer tube 217 close to the iron core 206 is connected with an impact piston 211 through a keyway. The impact piston 211 extends into the bearing seat 215 and is not in contact with the bearing seat 215. The iron core 206 can be in contact with the impact piston 211. One end of the outer tube 217 away from the bearing seat 215 is threadedly connected with the button bit 220. A semi-circular snap ring 218 and a spline sleeve 219 are arranged at one end of the button bit 220 close to the outer tube 217 and extend into the outer tube 217. The functions of the semi-circular snap ring 218 and the spline sleeve 219 are to transmit the torque from the outer tube 217 and position and limit respectively.

[0056] The first lifting frame 104 and the second lifting frame 105 are connected together by a fine-thread screw 202. When controlling the first pneumatic cylinder 107 and the second pneumatic cylinder 108 to move the first lifting frame 104 up and down, the second lifting frame 105 will be driven to move synchronously, so that the two move together along the vertical axis direction of the second support frame 102 until the iron core 206 and the button bit 220 structure installed inside the electromagnetic frame contact the rock sample 503 at the bottom. After the button bit 220 abuts against the rock sample 503, continue to control the two pneumatic cylinders to adjust the drilling pressure of the drill bit.

[0057] Through the structure of two electromagnetic coils and the iron core 206, when the electromagnetic coils are energized, an electromagnetic field is generated, making the iron core 206 perform a high-frequency axial periodic motion. The iron core 206 passes through the harmonic reducer 209 and the pressure sensor 501 and continuously impacts the impact piston 211 inside the bearing seat 215. The impact force is transmitted to the outer tube 217 through the impact piston 211, and then transmitted to the button bit 220 through the outer tube 217. The harmonic reducer 209 arranged on the abrasion-resistant sleeve 210 is also used together with the electromagnetic coils to convert the high-frequency pulsed magnetic field energy into a controllable mechanical impact motion. This structure solves the disadvantages of the mechanical impact transmission component being complex in structure and poor in controllability compared with the prior art.

[0058] The periodic motion process of the electromagnetic impact component 2 is as follows: Apply an alternating current power supply to two groups of electromagnetic coils, adjust the magnitude of the impact frequency, turn on the impact start switch through an external control panel. The electromagnetic field generated by the electromagnetic coils causes the iron core 206 to move upward. After the iron core 206 moves to the backing plate 201, it moves downward, and finally transmits the impact force to the impact piston 211 and the button bit 220, and ultimately transmits it to the rock sample 403 to enter the impact rock-breaking experimental mode.

[0059] The structure of the rotary component 3 is as Figure 9 shown. The rotary component 3 includes a motor 301, a driving wheel 302, a conveyor belt 303, and a driven wheel 304;

[0060] The motor 301 is fixedly connected to the second lifting frame 105. The driving wheel 302 is fixed on the motor 301. The driven wheel 304 is fixedly connected to the outer tube 217. The motor 301 transmits the torque to the outer tube 217 through the driving wheel 302, the conveyor belt 303, and the driven wheel 304, thereby driving the button bit 220 to enter the rotary rock-cutting experimental mode. When the outer tube 217 rotates, since it is connected to the impact piston 211 through a keyway, it will drive the impact piston 211 to rotate together. The impact piston 211 does not contact the inside of the bearing seat 215, and the inside of the bearing seat 215 is a bearing structure. When the outer tube 217 rotates, the bearing seat 215 can fix the outer tube 217 below the second lifting frame 105 without affecting its rotation.

[0061] The structure of the rock sample clamping component 4 is as Figure 10 shown, and it includes a rock box 401, a rock sample fixing member 402, a rock sample 403, and a valve 404;

[0062] The rock box 401 is a rectangular cavity structure with an open upper end, which is used to place the rock sample 403 and store drilling fluid. Two groups of rock sample fixing members 402 are fixedly installed inside the rock box 401. The rock sample fixing member 402 includes a column 40201, a pressing plate 40202, and a nut 40203, which are used to fix the rock sample 403. A valve 404 is installed on the left rear side of the rock box 401, which is used to discharge the drilling fluid.

[0063] During actual use, first remove the nut 40203 and the pressing plate 40202 from the column 40201, then place the rock sample 403 between several columns 40201, then press the pressing plate 40202 on the rock sample 403, and finally fix the pressing plate 40202 and the rock sample 403 through the nut 40203 to complete the installation of the rock sample.

[0064] The data acquisition component includes a pressure sensor 501, a displacement sensor board 502, and a displacement sensor 503;

[0065] The pressure sensor 501 is arranged on the second lifting frame 105 and is used for monitoring the magnitude of the drilling pressure in real time. The displacement sensor board 502 is rigidly connected to the second pneumatic cylinder 108, and the displacement sensor 503 is fixedly connected to the displacement sensor board 502 and is used for monitoring the displacement of the first lifting frame 104.

[0066] The actual working process of the present invention is as follows:

[0067] Preparation stage:

[0068] First, start the device power supply, prepare the rock sample 403 as needed, and fix the rock sample 403 in the rock box 401 through the rock sample fixing member 402.

[0069] Regulate the air pressure in the pneumatic cylinder through the control panel, and then turn on the main body downward switch to make the electromagnetic impact assembly 2 descend vertically as a whole until the button bit 220 abuts against the rock sample 403. Finally, adjust the air pressure of the cylinder again through the control panel. This time, the air pressure adjustment is used to set an appropriate drilling pressure value, and the specific value of the drilling pressure can be obtained through the pressure sensor 501 arranged on the second lifting frame 105.

[0070] Impact rock-breaking experiment mode:

[0071] The operator sets the impact frequency parameter through the control panel and starts the impact switch. The electromagnetic coil in the electromagnetic frame generates an alternating electromagnetic field, and its energy is converted into mechanical kinetic energy through the iron core 206 to drive the iron core 206 to perform high-frequency reciprocating motion to impact the impact piston 211. Finally, the impact load is transmitted to the rock sample 403 through the button bit 220 to start impact rock-breaking, and the staff then records the experimental data.

[0072] Rotary rock-breaking experiment mode:

[0073] The operator sets the rotation speed parameter through the control panel and starts the rotary cutting switch. The outer tube 217 is driven to rotate by the motor 301, and the outer tube 217 will drive the button bit 220 to start rotating for rotary rock-breaking, and the staff then records the experimental data.

[0074] Impact rotary rock-breaking experiment mode:

[0075] First, the operator sets the rotation speed parameter through the control panel, starts the rotary cutting switch first. After the rotary rock-breaking is stable, then set the impact frequency parameter through the control panel, and then start the impact switch to make the whole device enter the impact rotary rock-breaking experiment mode, and the staff then records the experimental data.

[0076] After the experiment is completed, the operator sets the air pressure parameter of the pneumatic cylinder through the control panel to make the electromagnetic impact assembly 2 rise as a whole. The entire process of the electromagnetic impact assembly 2 descending and rising is as Figure 5 shown in.

[0077] After the electromagnetic impact assembly 2 has completed its ascent, the staff removes the pressure plate 40202 and takes out the rock sample 403 that has completed the experiment, and thus the entire experimental process ends.

Claims

1. A controllable impact rotary drilling test platform based on bidirectional electromagnetic action, characterized in that, It includes a support and pressurization assembly (1), an electromagnetic impact assembly (2), a rotary assembly (3), a rock sample clamping assembly (4) and a data acquisition assembly; The support and pressurization assembly (1) is of a frame structure. The electromagnetic impact assembly (2) is arranged inside the support and pressurization assembly (1). The support and pressurization assembly (1) can control the electromagnetic impact assembly (2) to move in the vertical direction; The rotary assembly (3) is arranged on the support and pressurization assembly (1) on the lower side of the electromagnetic impact assembly (2). The rotary assembly (3) is connected to the electromagnetic impact assembly (2) and can make the electromagnetic impact assembly (2) rotate; The rock sample clamping assembly (4) is arranged at the bottom of the electromagnetic impact assembly (2). The data acquisition assembly is arranged on the support and pressurization assembly (1) and the electromagnetic impact assembly (2).

2. The controllable impact rotary drilling test platform based on bidirectional electromagnetic action according to claim 1, wherein, The support and pressurization assembly (1) includes a first support frame (101), a second support frame (102), a first lifting frame (104), a second lifting frame (105), a slider bearing unit (106), a first air cylinder (107), and a second air cylinder (108); Both the first support frame (101) and the second support frame (102) are of rectangular frame structures. The size of the second support frame (102) is smaller than that of the first support frame (101) and it is arranged inside the first support frame (101). Inside the frame of the second support frame (102), the first lifting frame (104) and the second lifting frame (105) are slidably connected through the slider bearing unit (106). Cross beams are arranged on the left and right sides of the second support frame (102), and the first air cylinder (107) and the second air cylinder (108) are respectively arranged on the cross beams. The output ends of the two air cylinders are jointly connected to the first lifting frame (104).

3. A controllable impact rotary drilling test platform based on bidirectional electromagnetic action according to claim 2, characterized in that, The electromagnetic impact assembly (2) includes an electromagnetic frame and an impact assembly. The electromagnetic frame includes a fine pitch screw (202), an upper end cover (207), and a lower end cover (208). The fine pitch screw (202) is arranged in a circular array with multiple roots. The top of the fine pitch screw (202) passes through the first lifting frame (104) and is fixedly connected thereto. Two groups of upper end covers (207) and lower end covers (208) are fixedly arranged by the multiple fine pitch screws (202). An electromagnetic coil is arranged between each group of upper end covers (207) and lower end covers (208). A coil protection cover (205) is sleeved outside the electromagnetic coil. Through holes with the same position and size are arranged between the upper end cover (207) and the lower end cover (208); The impact assembly comprises an iron core (206) and a ball-tooth drill bit (220); the iron core (206) is a cylindrical structure; the iron core (206) is arranged inside an electromagnetic frame through a plurality of through holes; a wear-resistant sleeve (210) is provided on the outer movable sleeve of the iron core (206); the wear-resistant sleeve (210) is fixedly arranged at the center of the second lifting frame (105); a harmonic reducer (209) is provided on the side of the wear-resistant sleeve (210) close to the iron core (206); an annular pressure sensor (501) is provided on the second lifting frame (105); a bearing seat (215) is provided on the side of the pressure sensor (501) away from the electromagnetic frame; the iron core (206) is in contact with an impact piston (211); and a ball-tooth drill bit (220) is detachably fixedly connected on the side of the bearing seat (215) away from the iron core (206).

4. A controllable impact rotary drilling test platform based on bidirectional electromagnetic action according to claim 3, characterized in that, The rotary assembly (3) comprises a motor (301) and a transmission belt (303), and the motor (301) is transmission-connected to an outer tube (217) fixedly connected to the ball-tooth drill bit (220) via the transmission belt.

5. The controllable impact rotary drilling test platform based on bidirectional electromagnetic action according to claim 1, characterized in that The rock sample clamping assembly (4) comprises a rock box (401), a rock sample fixing member (402), and a valve (404); The rock box (401) is a rectangular cavity structure with an opening at the upper end. Two groups of rock sample fixing members (402) are fixedly installed inside the rock box (401). The rock sample fixing members (402) include columns (40201) and pressure plates (40202). The columns are fixedly arranged at the bottom of the rock box (401). The columns (40201) are connected to each other through the pressure plates (40202). A valve (404) is installed on the left rear side of the rock box (401).

6. The controllable impact rotary drilling test platform based on bidirectional electromagnetic action according to claim 3, characterized in that, The data acquisition component (5) comprises a displacement sensor plate (502) and a displacement sensor (503); The displacement sensor plate (502) is rigidly connected to the second pneumatic cylinder (108), and the displacement sensor (503) is fixedly connected to the displacement sensor plate (502).

7. A controllable impact rotary drilling test platform based on bidirectional electromagnetic action according to claim 4, characterized in that The end of the bearing seat (215) away from the iron core (206) is fixedly connected to an outer tube (217); the end of the outer tube (217) close to the iron core (206) is connected to an impact piston (211) through a keyway; the impact piston (211) extends into the interior of the bearing seat (215) and does not contact the bearing seat (215); the iron core (206) can contact the impact piston (211); the end of the outer tube (217) away from the bearing seat (215) is threadedly connected to a ball-tooth drill bit (220); the end of the ball-tooth drill bit (220) close to the outer tube (217) is provided with a semicircular retaining ring (218) and a spline sleeve (219) and extends into the interior of the outer tube (217).

8. A controllable impact rotary drilling test platform based on bidirectional electromagnetic action according to claim 3, characterized in that, A pad (201) is provided at the bottom of the first lifting frame (104) at a position corresponding to the position of the iron core (206).

9. A controllable impact rotary drilling test platform based on bidirectional electromagnetic action according to claim 3, characterized in that, The upper end cover (207), the lower end cover (208) and the coil protection cover (205) are all made of materials that can isolate electromagnetic field interference.

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