Slow elastic type directional drilling system and equipment

Abstract

The invention provides a slow elastic type directional drilling system and equipment, which are applied to the field of directional drilling equipment, and are characterized in that the slow elastic type directional drilling system comprises a sliding driving motor; the translation conversion mechanism is used for converting the torsion output by the slippage driving motor into acting force for driving the drill rod to slip in the axial direction; the first brake device slows down the slippage of the drill rod when being electrified and is electrically connected with the slippage driving motor; the rotary driving motor drives the drill rod to rotate; the second brake device slows down rotation of the drill rod when powered on and is electrically connected with the rotation driving motor; the device has the technical effects that the reverse rotation speed of the drill rod drawing motor can be slowed down, and the device is protected to a certain extent.

Description

Technical Field

[0001] The invention relates to the field of directional drilling equipment, and in particular to a slow-rebound directional drilling system and equipment. Background Art

[0002] Horizontal directional drilling rig is a kind of construction machinery used for laying various underground public facilities (pipelines, cables, etc.) without excavating the ground surface. It is widely used in the laying of flexible pipelines for water supply, electricity, telecommunications, natural gas, coal gas, oil, etc. It is suitable for sandy soil, clay and other ground conditions, and has the advantages of fast construction speed, high construction precision and low cost.

[0003] The drill rod of the horizontal directional drilling rig is designed in sections. When drilling, the drill rod extends into the soil layer section by section. After the drilling is completed, it is necessary to drive the drill rod to rotate in the opposite direction while pulling it back. Then the pulled back drill rods are removed one by one. When removing them, it is necessary to stop driving the drill rod. When the drill rod is driven, because the rod body is very long, a certain amount of elastic potential energy along the length direction of the rod body and along the rotation direction will be accumulated on the rod body. At the moment the drill rod is stopped, the elastic potential energy accumulated on the rod body will be released to pull the drill rod to slide and rotate in the opposite direction. Rapid pulling of the motor that drives the drill rod will reverse, which can easily cause damage to the equipment. Summary of the invention

[0004] A first aspect of the present invention provides a slow-bounce directional drilling system, which has the advantage of being able to slow down the speed of the drill rod pulling motor reverse rotation and provide a certain degree of protection for the equipment.

[0005] A second aspect of the present invention provides a slow-rebound directional drilling device.

[0006] The first aspect of the present invention provides the following technical solution: a slow-bounce directional drilling system, comprising: Slip drive motor; A translation conversion mechanism, used for converting the torque output by the sliding drive motor into a force driving the drill rod to move axially; A first brake device is electrically connected to the sliding drive motor, and is used to apply reverse torque to the output shaft of the sliding drive motor when the sliding drive motor is reversed and generates electricity by being pulled by the drill rod, so as to reduce the rotation speed of the output shaft of the sliding drive motor; A rotary drive motor for driving the drill pipe to rotate; and The second brake device is electrically connected to the rotary drive motor and is used to apply reverse torque to the output shaft of the rotary drive motor to reduce the rotation speed of the output shaft of the rotary drive motor when the rotary drive motor is reversed and generates electricity due to the pulling of the drill rod.

[0007] Through the above technical solution, the sliding drive motor and the rotating drive motor need to be stopped before removing the drill rod. The elastic potential energy accumulated in the rod body will be released at the moment the sliding drive motor and the rotating drive motor stop. The sliding drive motor and the rotating drive motor are pulled to reverse. When the sliding drive motor reverses, the sliding drive motor will generate electricity. After power is turned on, the first braking device applies a force to the output shaft of the sliding drive motor to limit its rotation, thereby reducing the rotation speed of the output shaft of the sliding drive motor, quickly hindering the rebound of the drill rod, and having a certain protective effect on the equipment. The working principle of the second braking device is the same as that of the first braking device.

[0008] In one embodiment of the present invention, the translation conversion mechanism includes: a rack; a sliding seat installed on the rack, the sliding seat can slide back and forth along the rack, and the drill rod is supported by the sliding seat; a first reducer installed on the sliding seat, the input shaft of which is driven to rotate by the output shaft of the sliding drive motor; and a gear, which is driven to rotate by the output shaft of the first reducer and meshes with the rack.

[0009] Through the above technical solution, the sliding drive motor drives the gear to rotate, and the gear moves along the rack direction when rotating, thereby driving the sliding seat to slide back and forth along the rack, thereby driving the drill rod to extend or retract, and the first reducer plays a role in reducing the gear rotation speed, thereby controlling the sliding speed of the sliding seat, so that the extension or retraction speed of the drill rod can adapt to the drilling requirements.

[0010] In one embodiment of the present invention, the first braking device is configured as a first magnetic powder brake, and an output shaft of the first magnetic powder brake is circumferentially fixed to the gear.

[0011] Through the above technical solution, the first magnetic powder brake directly acts on the gear to reduce the rotation speed of the gear when it is pulled by the drill rod, thereby reducing the rotation speed of the output shaft of the first reducer, avoiding the drill rod pulling the output shaft of the first reducer to reverse too quickly and exceed the limit speed of the first reducer, causing damage to the first reducer, thereby protecting the first reducer; at the same time, with the release of the elastic potential energy of the drill rod, the force of the reverse rotation of the sliding drive motor caused by the drill rod pulling will decrease, and the power generation of the sliding drive motor will also decrease. At this time, the torque applied by the first magnetic powder brake to the sliding drive motor will also decrease accordingly, thereby playing the role of gradually and slowly stopping the drill rod and slowly releasing the elastic potential energy of the drill rod.

[0012] In one embodiment of the present invention, the first braking device is configured as a first hollow shaft magnetic powder brake, the output shaft of the sliding drive motor passes through the hollow shaft of the first braking device and is keyed to the hollow shaft of the first braking device, and at the same time, the output shaft of the sliding drive motor is drivingly connected to the input shaft of the first reducer.

[0013] Through the above technical solution, the first braking device reduces the rotation speed of the output shaft of the sliding drive motor and the input shaft of the first reducer when energized, thereby preventing the drill rod from pulling the output shaft of the first reducer to reverse too quickly and exceed the limit speed of the first reducer, causing damage to the first reducer, thereby protecting the first reducer.

[0014] In one embodiment of the present invention, the first braking device is configured as a first electromagnetic brake, the output shaft of the sliding drive motor passes through the rotor of the first electromagnetic brake and is transmission-connected to the rotor of the first electromagnetic brake, and the output shaft of the sliding drive motor is transmission-connected to the input shaft of the first reducer.

[0015] Through the above technical solution, the first electromagnetic brake reduces the rotation speed of the output shaft of the sliding drive motor and the input shaft of the first reducer when energized, thereby preventing the drill rod from pulling the output shaft of the first reducer to reverse too quickly and exceed the limit speed of the first reducer, causing damage to the first reducer, thereby protecting the first reducer.

[0016] In one embodiment of the present invention, the rotary drive motor is connected to the drill rod via a second reducer, the output shaft of the rotary drive motor drives the input shaft of the second reducer to rotate, and the output shaft of the second reducer drives the drill rod to rotate.

[0017] Through the above technical solution, the second reducer plays a role in reducing the rotation speed of the drill rod, so that the rotation speed of the drill rod is within a range suitable for drilling.

[0018] In one embodiment of the present invention, the second braking device is configured as a second magnetic powder brake, and an output shaft of the second magnetic powder brake is drivingly connected to the drill rod.

[0019] Through the above technical solution, the second magnetic powder brake reduces the rotation speed of the drill rod after being energized, thereby reducing the rotation speed of the output shaft of the second reducer, thereby preventing the drill rod from pulling the output shaft of the second reducer to rotate too fast, exceeding the limit speed of the second reducer and causing damage to the second reducer.

[0020] In one embodiment of the present invention, the second braking device is configured as a second hollow shaft magnetic powder brake, the output shaft of the rotary drive motor passes through the hollow shaft of the second hollow shaft magnetic powder brake and is keyed to the hollow shaft, and the output shaft of the rotary drive motor is drivingly connected to the input shaft of the second reducer.

[0021] Through the above technical solution, the second hollow shaft magnetic powder brake reduces the rotation speed of the output shaft of the rotating drive motor and the input shaft of the second reducer when energized, thereby preventing the drill rod from pulling the output shaft of the second reducer to rotate too fast, exceeding the limit speed of the second reducer and causing damage to the second reducer.

[0022] In one embodiment of the present invention, the second braking device is configured as a second electromagnetic brake, the output shaft of the rotary drive motor passes through the rotor of the second electromagnetic brake and is transmission-connected to the rotor of the second electromagnetic brake, and the output shaft of the rotary drive motor is transmission-connected to the input shaft of the second reducer.

[0023] Through the above technical solution, the second electromagnetic brake reduces the rotation speed of the output shaft of the sliding drive motor and the input shaft of the second reducer when energized, thereby preventing the drill rod from pulling the output shaft of the second reducer to reverse too quickly and exceed the limit speed of the second reducer, causing damage to the second reducer, thereby protecting the second reducer.

[0024] The second aspect of the present invention provides the following solution: a slow-rebound directional drilling device, comprising the above-mentioned slow-rebound directional drilling system.

[0025] As described above, the slow-bounce directional drilling system and equipment of the present invention have the following beneficial effects: Before removing the drill rod, it is necessary to stop the sliding drive motor and the rotating drive motor. The elastic potential energy accumulated in the rod body will be released at the moment the sliding drive motor and the rotating drive motor stop. The sliding drive motor and the rotating drive motor are pulled to reverse. When the sliding drive motor reverses, the sliding drive motor will generate electricity. After being energized, the first braking device applies a force to the output shaft of the sliding drive motor to limit its rotation, thereby reducing the rotation speed of the output shaft of the sliding drive motor, quickly hindering the rebound of the drill rod, and having a certain protective effect on the equipment. The working principle of the second braking device is the same as that of the first braking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It shows a schematic diagram of the slow-rebound directional drilling equipment disclosed in Example 1 of the present invention.

[0027] Description of technical feature numbers in the accompanying drawings: 1. Sliding drive motor; 2. First brake device; 3. Rotation drive motor; 4. Drill rod; 5. Second brake device; 6. Rack rail; 7. Sliding seat; 8. First reducer; 9. Gear; 10. Car body; 11. Second reducer. DETAILED DESCRIPTION

[0028] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Example 1

[0029] See also Figure 1The present invention provides a slow-rebound directional drilling device, comprising: The vehicle body 10 is loaded with a slow-bounce directional drilling system, which includes a sliding drive motor 1, a translation conversion mechanism, a first braking device 2, a rotation drive motor 3 and a second braking device 5.

[0030] See also Figure 1 The translation conversion mechanism includes: a rack 6 installed on the vehicle body 10; a sliding seat 7 slidably assembled on the rack 6, the sliding seat 7 can slide back and forth along the rack 6, and a drill rod 4 is rotatably connected to the sliding seat 7 through a bearing, and the drill rod 4 is arranged in sections, and the drill rod 4 at the tail end is connected to the sliding seat 7, and the axial direction of the drill rod 4 is the same as the length direction of the rack 6; a first reducer 8 whose outer shell is fixed to the sliding seat 7 by screws, and the input shaft of the first reducer 8 is driven to rotate by the output shaft of the sliding drive motor 1; and a gear 9, which is driven to rotate by the output shaft of the first reducer 8 and meshes with the rack 6, and the sliding drive motor 1 drives the gear 9 to rotate so that the gear 9 moves along the length direction of the rack 6, thereby driving the sliding seat 7 to slide along the rack 6, and then driving the drill rod 4 to feed or retreat.

[0031] See also Figure 1 The first brake device 2 is arranged between the sliding drive motor 1 and the first reducer 8. In the present embodiment, the first brake device 2 is arranged as a first hollow shaft magnetic powder brake. The output shaft of the sliding drive motor 1 passes through the hollow shaft of the first brake device 2 and is connected to the input shaft of the first reducer 8 through a key for transmission. The output shaft of the sliding drive motor 1 is key-connected with the hollow shaft of the first brake device 2. The housing of the first brake device 2 is fixed to the sliding seat 7. At the same time, the first brake device 2 is electrically connected to the sliding drive motor 1 through an electric wire. When the sliding drive motor 1 normally drives the drill rod 4 to move, the first brake device 2 does not work. Once the sliding drive motor 1 is pulled by the drill rod 4 to reverse and generate electricity, the first brake device 2 is energized to apply reverse torque to the input shaft of the first reducer 8 and the output shaft of the sliding drive motor 1, thereby reducing the output shaft speed of the first reducer 8, thereby preventing the force applied by the drill rod 4 to the first reducer 8 from driving the first reducer 8 to reverse too fast and exceeding the speed limit of the first reducer 8, thereby damaging the first reducer 8, thereby protecting the first reducer 8.

[0032] See also Figure 1The rotary drive motor 3 and the second brake device 5 are both mounted on the sliding seat 7 by screws, and a second reducer 11 is also mounted on the sliding seat 7 by screws. The second brake device 5 is arranged between the rotary drive motor 3 and the second reducer 11. In this embodiment, the second brake device 5 is arranged as a second hollow shaft magnetic powder brake. The rotary drive motor 3 passes through the hollow shaft of the second brake device 5 and is keyed to the hollow shaft. The output shaft of the rotary drive motor 3 is keyed to the input shaft of the second reducer 11 after passing through the hollow shaft, and the output shaft of the second reducer 11 is keyed to the drill rod 4.

[0033] The second brake device 5 is electrically connected to the rotary drive motor 3 through electric wires. When the output shaft of the rotary drive motor 3 is driven to rotate by the drill rod 4, the second brake device 5 is energized. The second brake device 5 outputs torque to the input shaft of the second reducer 11 to reduce the rotation speed of the input shaft of the second reducer 11, thereby reducing the rotation speed of the output shaft of the second reducer 11, thereby preventing the force exerted by the drill rod 4 on the second reducer 11 from driving the second reducer 11 to reverse too fast and exceed the rotation speed limit of the second reducer 11, causing damage to the second reducer 11, thereby playing a certain protective role for the second reducer 11.

[0034] Before removing the drill rod 4, the present invention needs to stop the sliding drive motor 1 and the rotating drive motor 3. At the moment when the sliding drive motor 1 and the rotating drive motor 3 stop, the elastic potential energy accumulated in the rod body will be released, and the sliding drive motor 1 and the rotating drive motor 3 will be pulled to reverse. When the sliding drive motor 1 reverses, the sliding drive motor 1 will generate electricity. After being energized, the first brake device 2 applies a force to the output shaft of the sliding drive motor 1 to limit its rotation, and the greater the power, the greater the force. Therefore, when the drill rod 4 pulls the sliding drive motor 1 to reverse, the first brake device 2 will quickly reverse. A reverse torque should be applied to the output shaft of the sliding drive motor 1 to quickly hinder the rebound of the drill rod 4, thereby providing a certain degree of protection for the equipment. As the elastic potential energy of the drill rod 4 is released, the force of the drill rod 4 pulling the sliding drive motor 1 to reverse will decrease. At this time, the power generation of the sliding drive motor 1 will also decrease, and the torque applied by the first braking device 2 to the sliding drive motor 1 will also decrease accordingly, thereby gradually and slowly stopping the drill rod 4 and slowly releasing the elastic potential energy of the drill rod 4. The working principle of the second braking device 5 is the same as that of the first braking device 2. Example 2

[0035] The difference between this embodiment and embodiment 1 is that the first braking device 2 is configured as a single-axis magnetic powder brake, and the braking shaft of the first braking device 2 is directly key-connected to the gear 9 of the translation conversion mechanism. After being energized, the first braking device 2 directly outputs torque to the gear 9 and reduces the rotation speed of the gear 9, thereby reducing the rotation speed of the output shaft of the first reducer 8 through linkage, thereby providing a certain degree of protection for the first reducer 8. Example 3

[0036] The difference between this embodiment and embodiment 1 is that the second braking device 5 is configured as a single-axis magnetic powder brake, the output shaft of the rotary drive motor 3 is keyed to the input shaft of the second reducer 11, the output shaft of the second reducer 11 is transmission-connected to the drill rod 4 through a gear box, the braking shaft of the second braking device 5 is connected to the gear box and transmission-connected to the drill rod 4 through the gear box, and the rotation speed of the gear box is slowed down when the second braking device 5 is energized, thereby reducing the output shaft rotation speed of the second reducer 11 and protecting the second reducer 11. Example 4

[0037] The difference between this embodiment and embodiment 1 is that the first braking device 2 is configured as a first electromagnetic brake, the output shaft of the sliding drive motor 1 passes through the rotor of the first electromagnetic brake and is transmission-connected to the rotor of the first electromagnetic brake, and at the same time, the output shaft of the sliding drive motor 1 is transmission-connected to the input shaft of the first reducer 8, and the first electromagnetic brake limits the rotation of the rotor after power is supplied, thereby reducing the rotation speed of the output shaft of the sliding drive motor 1 and protecting the equipment. Example 5

[0038] The difference between this embodiment and embodiment 1 is that the second braking device 5 is configured as a second electromagnetic brake, the second braking device is configured as a second electromagnetic brake, the output shaft of the rotary drive motor 3 passes through the rotor of the second electromagnetic brake and is transmission-connected to the rotor of the second electromagnetic brake, and at the same time, the output shaft of the rotary drive motor 3 is transmission-connected to the input shaft of the second reducer 11, and the second electromagnetic brake limits the rotation of the rotor after power is supplied, thereby reducing the rotation speed of the output shaft of the rotary drive motor 3 and protecting the equipment.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A slow-bounce directional drilling system, characterized in that: include: Slip drive motor (1); A translation conversion mechanism, used for converting the torque output by the sliding drive motor (1) into a force for driving the drill rod (4) to move axially; A first brake device (2) is electrically connected to the sliding drive motor (1) and is used to energize and apply a reverse torque to the output shaft of the sliding drive motor (1) when the sliding drive motor (1) is pulled by the drill rod (4) to generate electricity in reverse, so as to reduce the rotation speed of the output shaft of the sliding drive motor (1); a rotary drive motor (3) for driving the drill rod (4) to rotate; and The second brake device (5) is electrically connected to the rotary drive motor (3) and is used to apply reverse torque to the output shaft of the rotary drive motor (3) to reduce the rotation speed of the output shaft of the rotary drive motor (3) when the rotary drive motor (3) is reversed and generates electricity due to the pulling of the drill rod (4).

2. The slow-rebound directional drilling system according to claim 1, characterized in that: The translation conversion mechanism comprises: a rack (6); a sliding seat (7) mounted on the rack (6), the sliding seat (7) being capable of sliding back and forth along the rack (6), and a drill rod (4) being mounted on the sliding seat (7); a first reducer (8) mounted on the sliding seat (7), the input shaft of which is driven to rotate by the output shaft of the sliding drive motor (1); and a gear (9) driven to rotate by the output shaft of the first reducer (8) and meshing with the rack (6).

3. The slow-rebound directional drilling system according to claim 2, characterized in that: The first braking device (2) is configured as a first magnetic powder brake, and the output shaft of the first magnetic powder brake is circumferentially fixed to the gear (9).

4. The slow-rebound directional drilling system according to claim 2, characterized in that: The first brake device (2) is configured as a first hollow shaft magnetic powder brake, the output shaft of the sliding drive motor (1) passes through the hollow shaft of the first brake device (2) and is keyed to the hollow shaft of the first brake device (2), and the output shaft of the sliding drive motor (1) is drivingly connected to the input shaft of the first reducer.

5. The slow-rebound directional drilling system according to claim 2, characterized in that: The first braking device (2) is configured as a first electromagnetic brake, the output shaft of the sliding drive motor (1) passes through the rotor of the first electromagnetic brake and is transmission-connected to the rotor of the first electromagnetic brake, and the output shaft of the sliding drive motor (1) is transmission-connected to the input shaft of the first reducer (8).

6. The slow-rebound directional drilling system according to any one of claims 1 to 5, characterized in that: The rotary drive motor (3) is connected to the drill rod (4) via a second reducer (11); the output shaft of the rotary drive motor (3) drives the input shaft of the second reducer (11) to rotate, and the output shaft of the second reducer (11) drives the drill rod (4) to rotate.

7. The slow-bounce directional drilling system according to claim 6, characterized in that: The second braking device (5) is configured as a second magnetic powder brake, and the output shaft of the second magnetic powder brake is drivingly connected to the drill rod (4).

8. The slow-bounce directional drilling system according to claim 6, characterized in that: The second braking device (5) is configured as a second hollow shaft magnetic powder brake, the output shaft of the rotary drive motor (3) passes through the hollow shaft of the second hollow shaft magnetic powder brake and is key-connected to the hollow shaft, and the output shaft of the rotary drive motor (3) is drivingly connected to the input shaft of the second reducer (11).

9. The slow-bounce directional drilling system according to claim 6, characterized in that: The second braking device (5) is configured as a second electromagnetic brake, the output shaft of the rotary drive motor (3) passes through the rotor of the second electromagnetic brake and is transmission-connected to the rotor of the second electromagnetic brake, and the output shaft of the rotary drive motor (3) is transmission-connected to the input shaft of the second reducer (11).

10. A slow-bounce directional drilling device, characterized in that: The invention comprises the slow-rebound directional drilling system as described in any one of claims 1 to 9.

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