A planetary drilling sampling device for electric field assisted particle transport

Abstract

A planetary drilling sampling device for electric field assisted particle transport, relating to a planetary drilling sampling device, the present invention is to solve the problem that the traditional drilling mode has the disadvantages of high power consumption, large mass, and the drilling efficiency is largely affected by the excretion efficiency, which limits its application in aerospace exploration. The present invention solves the problem of mismatch between the optimal rotation speed between drilling and chip removal, reduces power consumption, and reduces reaction force.

Description

Technical Field

[0001] The present invention relates to a planetary drilling sampling device, in particular to a planetary drilling sampling device for electric field assisted particle migration. The present invention belongs to the technical field of extraterrestrial body sampling and detection technology. Background Art

[0002] In order to understand important information such as the original material composition, foreign matter, formation time, etc. of the planet, and to study the topography and landform composition, structural deformation, formation and evolution history of extraterrestrial bodies, it is necessary to obtain samples from underground the planet through drilling sampling.

[0003] The traditional drilling mode adopts the method of "spiral chip removal + rotary cutting". Its disadvantages such as high power consumption, large mass, and drilling efficiency being largely affected by chip removal efficiency limit its application in space exploration.

[0004] Some background technical principles involved in the invention are as follows:

[0005] (1) Principle of voltage boosting by piezoelectric transformer (see the attached figure in the specification) Figure 3 )

[0006] Since the power supply module of the system cannot provide the 10,000-volt excitation voltage of the chip removal electric field, a boost module is required. Compared with traditional winding transformers, piezoelectric transformers have the characteristics of small size, light weight, high temperature resistance, radiation resistance, electromagnetic interference resistance, and high reliability. The boost module uses a piezoelectric transformer.

[0007] The piezoelectric transformer consists of two parts, the driving part and the power generation part. Under the stimulation of the alternating low voltage at the input end, the driving part converts electrical energy into mechanical energy according to the inverse piezoelectric effect, realizes the telescopic vibration along the length direction, thereby stimulating the power generation part at the right end of the piezoelectric transformer, and converts mechanical energy into electrical energy according to the positive piezoelectric effect. Since the polarization directions of the driving part and the power generation part are different and the length of the piezoelectric vibrator is much greater than the thickness, the impedance of the input end is much smaller than the impedance of the output end, causing the voltage amplitude of the output end to be much larger than the value of the output end, thereby achieving the purpose of boosting.

[0008] (2) Electric field excitation principle

[0009] The polarized medium will move in the direction of decreasing potential in the electric field, but the electric field force is a short-range force, and its magnitude decreases sharply with the distance from the field source. The single-peak electric field cannot cause particles to move over long distances. When positive and negative potential bodies are arranged alternately along the same line in the same plane, alternating positive and negative electric field potential wells will appear in space (as shown in the attached figure of the specification). Figure 4 shown).

[0010] Stage 1: Before entering the electric field, the particles bind charges externally through polarization response and move in the direction of decreasing electric field potential energy (see the attached figure of the specification). Figure 5 shown);

[0011] Phase 2:

[0012] When the particle moves to the center of the potential well,

[0013] Particle A itself moves forward under the action of inertia;

[0014] B obtains the charge of the electrode through the low-conductivity coating layer. The free charge obtains a positive charge when it comes into contact with a high-potential body and a negative charge when it comes into contact with a low-potential body. The particles obtain a charge with the same polarity as the electrode and move to the next potential well area.

[0015] In the next potential well area, the particle is repelled by the charge obtained with the same polarity as the previous electrode, and attracted by the opposite polarity of the next electrode, so the particle continues to move forward;

[0016] Phase 3:

[0017] When the particle moves to the center of the next potential well,

[0018] Particle A first still moves forward under the action of inertia;

[0019] B Secondly, the particle neutralizes the charge it carries when it contacts the center of the previous potential well through contact;

[0020] CFinally, the particle carries a charge with the same polarity as the center of the potential well and enters the next potential well area.

[0021] By repeating the above process, the particles can move long distances along any preset trajectory.

[0022] (3) Low power consumption and low reaction force drilling principle

[0023] In the traditional rotary cutting + spiral chip removal drilling mode, cutting power consumption only accounts for 30% of the total power consumption. Most of the power consumption is consumed in spiral chip removal and the energy lost to cooperate with spiral chip removal. This proportion increases further with the increase of drilling depth. Summary of the invention

[0024] The present invention aims to solve the problem that the traditional drilling mode has the disadvantages of high power consumption, large mass, and the drilling efficiency is largely affected by the chip removal efficiency, which limits its application in space exploration, and thus provides a planetary drilling sampling device with electric field assisted particle transport.

[0025] The technical solution adopted by the present invention to solve the above problems is:

[0026] The present invention comprises a rotary drive component, a voltage conversion module, a high-voltage slip ring, a debris ejection plate, a positive excitation field circuit, a zero reference potential body, a thin-walled polished rod coring tube, a thin-walled coring drill bit and a sampling assembly. The rotary drive component, the debris ejection plate and the thin-walled polished rod coring tube are sequentially connected from top to bottom, a thin-walled coring drill bit is arranged at the lower end of the thin-walled polished rod coring tube, a plurality of positive excitation field circuits and a plurality of zero reference potential bodies are alternately arranged on the thin-walled polished rod coring tube, a zero reference potential body is arranged between every two positive excitation field circuits, a voltage conversion module is installed at the lower part of the rotary drive component, a high-voltage slip ring assembly is connected to the voltage conversion module, the sampling assembly is located at one side of the thin-walled polished rod coring tube, and the sampling assembly is connected to the voltage conversion module.

[0027] Furthermore, the sampling assembly includes a thermal control module, a sample processing cabin, an electric field sampling slot, a gas transmission pipeline, an electromechanical interface and a bracket. The upper end of the bracket is provided with an electromechanical interface, the lower end of the bracket is provided with a thermal control module, the gas transmission pipeline is inserted in the bracket, the upper end of the gas transmission pipeline extends to the upper end of the electromechanical interface, the lower end of the gas transmission pipeline is connected to the sample processing cabin, the electric field sampling slot is located between the thin-walled light rod core sampling tube and the bracket, the electric field sampling slot is inclined to the lower right, and the right end of the electric field sampling slot passes through the side wall of the bracket to communicate with the sample processing cabin.

[0028] Furthermore, the electric field sampling slot comprises a slot body, a plurality of positive field excitation circuits and a plurality of zero reference potential bodies, and the plurality of positive field excitation circuits and the plurality of zero reference potential bodies are arranged on the slot body at intervals.

[0029] Furthermore, in the voltage conversion module, a piezoelectric transformer provides a 10,000-volt excitation voltage for the chip removal electric field.

[0030] Furthermore, the inner ring of the high-voltage slip ring is fixed on the thin-walled polished rod coring tube and is connected to the positive pole excitation field circuit on the thin-walled polished rod coring tube.

[0031] Furthermore, the thin-walled polished rod coring tube comprises an insulating film layer, a conductive electrode layer, an insulating substrate layer and a drill body layer, and the insulating film layer, the conductive electrode layer, the insulating substrate layer and the drill body layer are arranged in sequence from the outside to the inside.

[0032] Furthermore, the thickness of the insulating film layer is 0.1 mm.

[0033] Furthermore, the thickness of the conductive electrode layer is 0.1 mm.

[0034] Furthermore, the diameter of the thin-walled coring drill bit is larger than that of the thin-walled polished rod coring tube.

[0035] The beneficial effects of the present invention are:

[0036] 1. The present invention simplifies the structure of the drill and reduces its size by introducing an electric field chip removal mechanism, solves the mismatch problem between the optimal rotation speeds for drilling and chip removal, improves the drilling procedure, improves the efficiency of the drill, reduces power consumption, and reduces reaction force;

[0037] 2. Compared with the traditional spiral chip removal, the introduction of the electric field saves 50% of the chip removal power consumption, and the additional electric field chip removal power consumption is only a few watts, which greatly reduces the drilling power consumption;

[0038] 3. Electric field chip removal does not require contact with the hole wall, reducing the friction torque and friction power consumption between the drill body and the hole wall;

[0039] 4. Thin-walled coring drill bits reduce the effective cutting length of the drill cutting edge, thereby reducing cutting reaction force, reducing cutting power consumption, and further reducing cutting power consumption and cutting reaction torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 Schematic diagram of the structure of the thin-walled polished rod core tube in the present invention;

[0042] Figure 3 It is the schematic diagram of piezoelectric transformer;

[0043] Figure 4 This is a simulation analysis diagram of the electric field potential well planar array;

[0044] Figure 5 It is the response principle of particles under electric field excitation.

[0045] In the figure: 1-rotation drive component, 2-voltage conversion module, 3-high-voltage slip ring assembly, 4-debris ejection plate, 5-positive excitation field circuit, 6-zero reference potential body, 7-thin-walled bare rod core tube, 8-thin-walled core drill bit, 9-thermal control module, 10-sample processing cabin, 11-electric field sampling slot, 12-gas transmission pipeline, 13-electromechanical interface, 14-insulating film layer, 15-conductive electrode layer, 16-insulating substrate layer, 17-drill body layer. DETAILED DESCRIPTION

[0046] Specific implementation method 1: Combination Figure 1 to Figure 2The present embodiment is described. The planetary drilling sampling device for electric field assisted particle transport described in the present embodiment includes a rotary drive component 1, a voltage conversion module 2, a high-voltage slip ring assembly 3, a debris ejection plate 4, a positive excitation field circuit 5, a zero reference potential body 6, a thin-walled polished rod coring tube 7, a thin-walled coring drill bit 8 and a sampling assembly. The rotary drive component 1, the debris ejection plate 4 and the thin-walled polished rod coring tube 7 are connected in sequence from top to bottom. A thin-walled coring drill bit 8 is provided at the lower end of the thin-walled polished rod coring tube 7. A plurality of positive excitation field circuits 5 and a plurality of zero reference potential bodies 6 are alternately arranged on the thin-walled polished rod coring tube 7. A zero reference potential body 6 is provided between every two positive excitation field circuits 5. The voltage conversion module 2 is installed at the lower part of the rotary drive component 1. The high-voltage slip ring assembly 3 is connected to the voltage conversion module 2. The sampling assembly is located on one side of the thin-walled polished rod coring tube 7. The sampling assembly is connected to the voltage conversion module 2

[0047] Specific implementation method 2: Combination Figure 1 to Figure 2 To illustrate this embodiment, the sampling assembly described in this embodiment includes a thermal control module 9, a sample processing chamber 10, an electric field sampling slot 11, a gas transmission pipeline 12, an electromechanical interface 13 and a bracket 14. The upper end of the bracket 14 is provided with an electromechanical interface 13, the lower end of the bracket 14 is provided with a thermal control module 9, the gas transmission pipeline 12 is inserted into the bracket 14, the upper end of the gas transmission pipeline 12 extends to the upper end of the electromechanical interface 13, the lower end of the gas transmission pipeline 12 is connected to the sample processing chamber 10, the electric field sampling slot 11 is located between the thin-walled light rod core sampling tube 7 and the bracket 14, the electric field sampling slot 11 is inclined to the lower right, and the right end of the electric field sampling slot 11 passes through the side wall of the bracket 14 to communicate with the sample processing chamber 10.

[0048] The other components and connection relationships are the same as those of the second specific implementation method.

[0049] Specific implementation method three: Combination Figure 1 to Figure 2 This embodiment is described. The electric field sampling slot 11 described in this embodiment includes a slot body, a plurality of second positive field excitation circuits 11-2 and a plurality of second zero reference potential bodies 11-1. The plurality of positive field excitation circuits 11-2 and the plurality of zero reference potential bodies 11-1 are arranged at intervals on the outer surface of the slot body.

[0050] The electric field sampling slot 11 is provided with a U-shaped slot, which serves as a transition channel between the electric field sampling slot 11 and the sample processing cabin 10. The samples collected by the electric field sampling slot 11 are transported to the sample processing cabin 10 through the transition channel; the outside of the electric field sampling slot 11 is provided with a positive field excitation circuit and a zero reference potential body arranged at the same intervals as those on the thin-walled light rod coring tube 7, and the electric field potential well generated by them is used to generate an array to transport samples.

[0051] The other components and connection relationships are the same as those of the first or second specific implementation mode.

[0052] Specific implementation method four: Combination Figure 1 to Figure 2 To explain this embodiment, in the voltage conversion module 2 of this embodiment, a piezoelectric transformer is used to provide a 10,000-volt excitation voltage for the chip removal electric field.

[0053] The other components and connection relationships are the same as those of the first, second or third specific implementation modes.

[0054] Specific implementation method five: Combination Figure 1 to Figure 2 This embodiment is described. The inner ring of the high-voltage slip ring 3 in this embodiment is fixed on the thin-walled polished rod coring tube 7 and is connected to the positive excitation field circuit 5 on the thin-walled polished rod coring tube 7 .

[0055] The outer ring of the high-voltage slip ring assembly 3 is fixed and connected to a high-voltage excitation power supply to provide a high-voltage excitation power supply; the inner ring is fixed on the core tube and connected to the positive excitation field circuit on the core tube to form an electric field potential well generating array; the drilling chips are polarized by the electric field at the drill bit and move in the direction of decreasing electric potential, repeatedly experiencing the polarization plus transfer process in the electric field potential well generating array, and can be transported over long distances according to any preset trajectory.

[0056] The other components and connection relationships are the same as those of the first, second, third or fourth specific implementation modes.

[0057] Specific implementation method six: Combination Figure 1 to Figure 2 To illustrate this embodiment, the thin-walled polished rod coring tube 7 described in this embodiment includes an insulating film layer 14, a conductive electrode layer 15, an insulating substrate layer 16 and a drill body layer 17, and the insulating film layer 14, the conductive electrode layer 15, the insulating substrate layer 16 and the drill body layer 17 are arranged in sequence from the outside to the inside.

[0058] The thin-walled bare rod coring tube 7 adopts a 4-layer structure, the outermost layer is a 0.1mm thick polyimide insulating coating layer, the second outer layer uses 0.1mm conductive silver paint as an electrode to generate a gradient distributed electric field array, and the second inner layer uses epoxy resin as an insulating substrate, which is insulated from the drill body layer of the innermost coring tube to avoid interfering with the electric field distribution.

[0059] The other components and connection relationships are the same as those of the first, second, third, fourth or fifth specific implementation modes.

[0060] Specific implementation method seven: Combination Figure 1 The present embodiment is described. The thickness of the insulating film layer 14 in the present embodiment is 0.1 mm.

[0061] The other components and connection relationships are the same as those of the first, second, third, fourth, fifth or sixth specific implementation modes.

[0062] Specific implementation method eight: Combination Figure 1 to Figure 2 To explain this embodiment, the thickness of the conductive electrode layer 15 in this embodiment is 0.1 mm.

[0063] The other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth or seventh specific implementation modes.

[0064] Specific implementation method nine: Combination Figure 1 To explain this embodiment, the diameter of the thin-walled coring drill bit 8 described in this embodiment is larger than that of the thin-walled polished rod coring tube 7. The front cutting position of the thin-walled polished rod coring drill bit 8 is composed of multiple raised cutting edges. Taking the drilling tool rotating one circle as an example, other drilling tools are mostly composed of single cutting edges or double cutting edges. For a single cutting edge, it is required to complete a full circle of effective cutting. For a double cutting edge, each cutting edge is required to complete 1 / 2 circle of effective cutting; the more cutting edges there are, the shorter the effective cutting length of a single cutting edge. The diameter of the thin-walled coring drill bit 8 is slightly larger than that of the thin-walled polished rod coring tube 7, so that the thin-walled polished rod coring tube 7 does not contact the wall of the borehole to generate friction, thereby reducing the generation of additional torque and power consumption.

[0065] The other components and connection relationships are the same as those of the first, second, third, fourth, fifth, sixth, seventh or eighth specific implementation modes.

[0066] Working principle:

[0067] After the drilling tool has made all preparations before drilling, the rotary driving component 1 provides the power for rotary cutting of the drilling unit composed of a thin-walled polished rod coring tube 7 and a thin-walled polished rod coring drill bit 8. A positive excitation field circuit 5 and a zero reference potential body 6 are arranged at intervals on the drilling unit. A voltage conversion module 2 and a high-voltage slip ring assembly 3 provide a high-voltage power supply to form an electric field potential well generating array. The drilling chips generated during the drilling process are polarized by the electric field at the drill bit and move along a preset direction in the gradient electric field generated by the electric field potential well generating array. When the drilling chips move to When the thin-walled core tube 7 is at the upper end, part of the drilling chips are ejected to a position away from the drill body by the electric field repulsion of the debris ejection plate 4, so as to avoid the discharged chips from accumulating at the root of the drill body and flowing back into the borehole for a second time; another part of the drilling chips enters the sample processing cabin 10 through the electric field sampling slot 11 which also has an electric field potential well generating array, and the samples entering the sample processing cabin 10 are heated by the thermal control module 9, and the volatiles therein enter the analytical instrument connected to the electromechanical interface 13 along the gas transmission pipeline 12 for composition analysis, thus completing the entire drilling sampling process.

[0068] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the content of the technical solution of the present invention, based on the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A planetary drilling sampling device for electric field assisted particle transport, characterized in that: The electric field auxiliary particle The mobile planetary drilling sampling device comprises a rotary drive component (1), a voltage conversion module (2), a high-voltage slip ring assembly (3), a debris ejection plate (4), a positive pole excitation field circuit (5), a zero reference potential body (6), a thin-walled polished rod coring tube (7), a thin-walled coring drill bit (8) and a sampling assembly, wherein the rotary drive component (1), the debris ejection plate (4) and the thin-walled polished rod coring tube (7) are connected in sequence from top to bottom, and the lower end of the thin-walled polished rod coring tube (7) is provided with a thin-walled coring drill bit. (8), a plurality of positive excitation field circuits (5) and a plurality of zero reference potential bodies (6) are alternately arranged on a thin-walled polished rod coring tube (7), a zero reference potential body (6) is arranged between every two positive excitation field circuits (5), a voltage conversion module (2) is installed at the bottom of the rotary drive component (1), a high-voltage slip ring assembly (3) is connected to the voltage conversion module (2), the sampling assembly is located on one side of the thin-walled polished rod coring tube (7), and the sampling assembly is connected to the voltage conversion module (2); The sampling assembly comprises a thermal control module (9), a sample processing chamber (10), an electric field sampling slot (11), a gas transmission pipeline (12), an electromechanical interface (13) and a bracket, wherein the upper end of the bracket is provided with an electromechanical interface (13), the lower end of the bracket is provided with a thermal control module (9), the gas transmission pipeline (12) is inserted into the bracket, the upper end of the gas transmission pipeline (12) extends to the upper end of the electromechanical interface (13), the lower end of the gas transmission pipeline (12) is connected to the sample processing chamber (10), the electric field sampling slot (11) is located between the thin-walled light rod core sampling tube (7) and the bracket, the electric field sampling slot (11) is inclined to the lower right, and the right end of the electric field sampling slot (11) passes through the side wall of the bracket and is connected to the sample processing chamber (10); The electric field sampling slot (11) comprises a slot body, a plurality of second positive field excitation circuits (11-2) and a plurality of second zero reference potential bodies (11-1), wherein the plurality of second positive field excitation circuits (11-2) and the plurality of second zero reference potential bodies (11-1) are arranged at intervals on the outer surface of the slot body.

2. The planetary drilling sampling device for electric field assisted particle transport according to claim 1, characterized in that: In the voltage conversion module (2), a piezoelectric transformer provides a 10,000-volt excitation voltage for the chip removal electric field.

3. The planetary drilling sampling device for electric field assisted particle transport according to claim 1, characterized in that: The inner ring of the high-voltage slip ring assembly (3) is fixed on the thin-walled polished rod coring tube (7) and is connected to the positive excitation field circuit (5) on the thin-walled polished rod coring tube (7).

4. The planetary drilling sampling device for electric field assisted particle transport according to claim 1, characterized in that: The thin-walled polished rod coring tube (7) comprises an insulating film layer (14), a conductive electrode layer (15), an insulating substrate layer (16) and a drill body layer (17), wherein the insulating film layer (14), the conductive electrode layer (15), the insulating substrate layer (16) and the drill body layer (17) are arranged in sequence from the outside to the inside.

5. The planetary drilling sampling device for electric field assisted particle transport according to claim 4, characterized in that: The thickness of the insulating film layer (14) is 0.1 mm.

6. The planetary drilling sampling device for electric field assisted particle transport according to claim 4, characterized in that: The thickness of the conductive electrode layer (15) is 0.1 mm.

7. The planetary drilling sampling device for electric field assisted particle transport according to claim 1, characterized in that: The diameter of the thin-walled coring drill bit (8) is larger than that of the thin-walled polished rod coring tube (7).

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