A soft rock stratum advance rotary digging exploration device

Abstract

A kind of soft rock stratum advance rotary drilling exploration device, including excavator chassis, rotary drilling rig pole piece and power supply, rotary drilling rig pole piece includes bottom power drill, steel support, rotary drill rod, buffer spring, rotary drilling rig centralizer and power motor, power motor is set at the top of rotary drill rod, buffer spring is sleeved on the upper portion of rotary drill rod, its upper end is connected with the output shaft transmission of power motor, lower end is connected with the upper end of steel support;Steel support is fixedly connected on the outer wall of rotary drill rod, for transmitting axial pressure and buffering vibration;Rotary drill rod is vertically arranged, and its bottom is fixedly connected with bottom power drill;Rotary drilling rig centralizer is sleeved on the middle lower portion of rotary drill rod, for keeping the vertical centering of drill rod;Power supply is electrically connected with power motor;Excavator chassis middle portion is equipped with rotary drill rod passageway, and excavator chassis is provided with travelling mechanism.The present application can effectively advance rotary drilling exploration in soft rock stratum.

Description

Technical Field

[0001] This invention pertains to exploration equipment, and more particularly to an advanced rotary drilling exploration device for soft rock formations. Background Technology

[0002] Exploration in soft rock formations primarily employs a technical approach combining mechanical rotary drilling with borehole wall support, specifically including mud circulation drilling rigs, casing-following drill bits, and multi-stage reaming devices. Traditional mud circulation drilling rigs are prone to jamming accidents in soft rock formations due to rock fracturing and blockage of the cuttings discharge channel. While casing-following drill bits can temporarily maintain borehole stability, frequent casing pulling significantly reduces construction efficiency and struggles to address borehole diameter reduction issues caused by soft rock creep. Multi-stage reaming devices, with their large contact area between the drill bit and the formation, are prone to excessive vibration in soft rock, exacerbating the risk of borehole collapse. Therefore, this application combines the effect of the butterfly buffer spring to reduce the impact force, and fixes the rotary drilling rig rod to the excavator chassis to make the bottom power drill bit stable for exploration; in addition, the bottom power drill bit made of single crystal or polycrystalline composite diamond has high strength and strong power output when combined with the motor device, so that the device has the characteristics of high stability, sufficient power, low mechanical wear and high efficiency, thus meeting the needs of advanced rotary drilling exploration in soft rock geology.

[0003] Regarding the aforementioned technologies, traditional soft rock geological exploration equipment suffers from drawbacks when performing underground rotary drilling, including bulky mechanical structures, high energy consumption, low efficiency, and exacerbation of the loosening and damage of soft rock structures. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides an advanced rotary drilling exploration device for soft rock formations, which can effectively conduct advanced rotary drilling exploration in soft rock formations.

[0005] The technical solution adopted by this invention to solve its technical problem is: A rotary drilling exploration device for soft rock formations includes an excavator chassis, a rotary drilling rig assembly, and a power supply. The rotary drilling rig assembly includes a bottom power drill bit, a steel support, a rotary drill rod, a buffer spring, a rotary drilling rig centering device, and a power motor. The power motor is located at the top of the rotary drill rod. The buffer spring is fitted onto the upper part of the rotary drill rod, with its upper end connected to the output shaft of the power motor and its lower end connected to the upper end of the steel support. The steel support is fixedly connected to the outer wall of the rotary drill rod to transmit axial pressure and buffer vibration. The rotary drill rod is vertically arranged, with its bottom fixedly connected to the bottom power drill bit. The rotary drilling rig centering device is fitted onto the lower middle part of the rotary drill rod to maintain the vertical alignment of the drill rod. The power supply is electrically connected to the power motor. The excavator chassis has a rotary drill rod channel in the middle and is equipped with a traveling mechanism.

[0006] Furthermore, the lower end of the power motor is connected to the top drive, and the lower end of the top drive is connected to the upper end of the buffer spring. This design can realize the vibration effect of the power motor and the top drive on the one hand, and buffer the soil squeezing stress during the exploration process on the other hand.

[0007] Furthermore, the bottom power drill bit surface is equipped with a layer of toothed rollers, which makes the device more convenient for exploration in soft rock formations. This structure not only effectively avoids stuck drill bits but also extends the drill bit's lifespan to 2.3 times that of conventional products, making it particularly suitable for rapid drilling operations in soft rock formations and providing an efficient and reliable rock-breaking solution for geological exploration and other fields.

[0008] The buffer spring is a butterfly-shaped buffer spring. The lower end of the butterfly-shaped buffer spring is connected to the steel support and assembled with the two sets of upper vibrating soil-dispersing devices. When the bottom power drill bit with toothed surface is conducting exploration operations, the two sets of upper vibrating soil-dispersing devices and the one set of lower vibrating soil-dispersing devices can simultaneously vibrate the soft rock soil around the rotary drilling rig's drill rod at high frequency, damaging the soft rock's bonding structure, reducing its shear strength, and loosening the originally dense or hardened soft rock.

[0009] The lower set of vibratory soil-dispersing devices is installed at the bottom of the rotary drill rod and works in conjunction with the bottom power drill bit to perform high-frequency cutting and low-resistance penetration in soft rock formations with the assistance of the telescopic arm and hydraulic rod. This enhances the identification of soft rock strata and reduces core disturbance errors, ensuring efficient soft rock breaking and drilling stability.

[0010] The telescopic boom and hydraulic rod are fixed together to the triangular wheel. The telescopic boom, hydraulic rod, and triangular wheel are assembled and installed on the back of the rotary drilling rig's straightening device. This device allows the rotary drilling rig's boom to be adjusted according to the actual geological conditions of soft rock. Simultaneously, its connection to the rotary drilling rig's straightening device ensures stable operation of the boom in soft rock formations, preventing tilting due to excessive disturbance and thus avoiding disruption to exploration operations.

[0011] To further ensure the stability of the advanced rotary drilling rig, in addition to the rotary drilling rig straightening device, an I-beam retainer is designed at the lower end of the rotary drilling rig straightening device to keep the overall advanced rotary drilling rig stable.

[0012] Preferably, the traveling mechanism is a tracked traveling mechanism, including a power motor, double gears, an outer track, an inner track, an outer track gear, and an inner track gear. A power motor is installed on the excavator chassis, and a double gear is installed on the output shaft of the power motor. The outer track and the inner track are respectively mounted on the double gears. The other end of the outer track is mounted on the outer track gear. The two ends of the inner track are respectively mounted on two double gears, and the inner track gear is installed in the middle of the inner track. The inner track gear is mounted on the output shaft of another power motor.

[0013] In this invention, the buffer spring component adopts a butterfly buffer spring, which enables the bottom power drill bit to provide stable restoring force during soft rock geological exploration, maintaining stable performance and achieving buffering and shock absorption of the entire device; the steel support component adopts an inverted structure, with the upper end connected to the butterfly buffer spring and the lower end fixed to the cylindrical structure. On the one hand, when the excavator starts working, the butterfly spring can release elastic force on it, and on the other hand, it cooperates with the rotary drilling rig rod to work normally; the power motor component, together with the power supply, provides exploration power for the entire rotary drilling device, enabling the excavator drill rod to perform circumferential rotation.

[0014] The bottom-mounted power drill bit is primarily composed of single-crystal or polycrystalline composite diamond, offering high rigidity and strength, reducing drill bit wear, shortening exploration time, and extending drill bit lifespan. The excavator chassis employs a tracked mechanical device, where two larger tracks drive two smaller tracks on each side, ensuring stable operation of the exploration equipment in soft rock formations. A disc spring assembly connects at one end to the upper two sets of vibratory soil-dispersing devices and at the other end to the bottom of the top drive, providing vertical rotational shock absorption, thereby increasing exploration speed and reducing drill rod damage. The entire drill rod assembly is made entirely of metal, giving it high temperature resistance and high strength. This solves the problems of traditional exploration machinery being bulky and the potential for construction vibrations to exacerbate the loosening and damage of soft rock structures.

[0015] The beneficial effects of this invention are mainly reflected in: 1. The rotary drilling rod is equipped with vibrating soil-dispersing devices at the upper and lower ends. Each group simultaneously vibrates the soft rock soil at high frequency, which damages the bonding structure of the soft rock and reduces its shear strength. At the same time, the two vibrating soil-dispersing devices work in opposite directions, so that the soil squeezing pressure generated during the exploration process cancels each other out, which improves the stress situation of the excavator drill rod during actual construction and increases the construction speed. 2. The power motor, as the power component of the entire rotary drilling device, provides power to the entire device and makes the excavator drill rod rotate in a circular motion, so as to realize the efficient and stable rotation of the drill rod, improve the soft rock breaking efficiency and exploration accuracy; 3. The bottom power drill bit assembly is made of monocrystalline or polycrystalline composite diamond material, and its surface is inlaid with high-hardness alloy hobbing teeth. As the core drilling component of the rotary drilling device, it ensures efficient crushing of soft rock and drilling stability through high-hardness cutting, realizes high-frequency cutting and low-resistance penetration of the bottom power drill bit, and improves the efficiency of soft rock geological exploration.

[0016] 4. The buffer spring assembly used is a butterfly-shaped buffer spring, which can be configured in multiple sets. For different soft rock geological conditions, multiple sets of butterfly-shaped buffer spring assemblies can provide stable restoring force, ensuring stable performance. (See attached diagram for details.) Figure 1 This is a schematic diagram of the overall structure of an advanced rotary drilling exploration device for soft rock formations; Figure 2 This is a schematic diagram of the rotary drilling rod in an advanced rotary drilling exploration device for soft rock formations; Figure 3 This is a schematic diagram of the relationship between the power motor and the top drive in an advanced rotary drilling exploration device for soft rock formations; Figure 4 This is a schematic diagram showing the working relationship between the power motor, the butterfly buffer spring, and the steel support; Figure 5 This is a schematic diagram showing the relationship between the bottom power drill bit and the lower vibratory soil-dispersing device; Figure 6 This is a schematic diagram of the assembly relationship of the excavator chassis; Figure 7 This is a schematic diagram of the track structure of a rotary drilling rig; Figure 8 This is a schematic diagram showing the working relationship between the telescopic boom, hydraulic rod, and triangular wheel; Figure 9 This is a schematic diagram showing the fit between the bottom power drill bit and the surface hobbing gear; Explanation of reference numerals in the attached drawings: 1. Outer track; 101. Inner track; 102. Track drive motor; 103. Double gear; 104. Inner track gear; 2. Protective cover; 206. Rotary drilling rod channel; 207. Baffle; 3. Rotary drilling rig components; 301. Drive motor; 302. Butterfly buffer spring; 303. Steel support; 304. Rotary drilling rod; 305. Upper two sets of vibratory soil-dispersing devices; 306. Lower one set of vibratory soil-dispersing devices; 307. Bottom power drill bit; 308. Rotary drilling rig straightening device; 309. Telescopic boom; 310. Triangular wheel; 311. Hydraulic rod; 312. I-beam retainer; 313. Drive motor protective cover housing; 314. Top drive; 315. Gear hobbing device; 4. Power supply. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings.

[0018] Reference Figures 1-9A rotary drilling exploration device for soft rock formations includes an excavator chassis, rotary drilling rig rods, and a power supply. The excavator chassis has a rotary drilling rod channel in the middle and a walking mechanism, which is a tracked walking mechanism. Baffles 207 are installed on six track power motors 102, which are connected by a double gear 103 to the outer track 1, inner track 101, and track power motors 102. The inner track gear 104 is installed on the tracked machine composed of the inner track 101. Finally, the rotary drilling rig rods 3 are connected through the rotary drilling rod channel to form the entire rotary drilling device.

[0019] Reference Figure 2 and Figure 3 The rotary drilling rig rod 3 is equipped with: a power motor 301, a butterfly buffer spring 302, a steel support 303, a rotary drilling rod 304, two sets of upper vibratory soil-dispersing devices 305, one set of lower vibratory soil-dispersing devices 306, a bottom power drill bit 307, a rotary drilling rig straightening device 308, a telescopic boom 309, a triangular wheel 310, a hydraulic rod 311, an I-beam retainer 312, a power motor cover shell 313, a top drive 314, and a gear hob 315. In this embodiment, the power motor cover shell 313 is welded to the top of the power motor 301 and, together with the top drive 314, is connected to the upper end of the butterfly buffer spring 302. The support 303 and the upper two sets of vibrating soil-dispersing devices 305 work in conjunction with the lower end of the butterfly buffer spring 302. The rotary drilling rod 304 and the lower set of vibrating soil-dispersing devices 306 are installed on the upper part of the bottom power drill bit 307. All the above connections are welded together with the rotary drilling rig straightening device 308 and the I-beam fixing device 312. The telescopic arm 309, hydraulic rod 311 and triangular wheel 310 are combined and installed on the back of the rotary drilling rig straightening device 308 to form the entire rotary drilling rig rod 3. The rotary drilling rig straightening device 308, in conjunction with the bottom power drill bit 307, improves the exploration efficiency in soft rock geology and reduces mechanical wear.

[0020] Reference Figure 4 The power motor cover housing 313 is welded to the upper part of the power motor 301 and works with the top drive 314 to allow continuous drilling and precise control of exploration. The structure consisting of a butterfly buffer spring 302 and a steel support 303 is connected to the lower end of the top drive 314, which can disperse the great stress caused during exploration, effectively reduce residual deformation, and reduce damage to the device.

[0021] Reference Figure 5The bottom power drill bit 307 is installed at the bottom of the drill rod 3 of the rotary drilling rig. A set of lower vibratory soil-dispersing devices 306 is welded to the upper end of the bottom power drill bit 307. When conducting soft rock geological exploration, the bottom power drill bit 307 is driven by the power motor 301 to carry out exploration drilling. The gaps in the lower set of vibratory soil-dispersing devices 306 will clear the surrounding soil, thereby improving exploration efficiency and reducing drill bit wear caused by soil accumulation.

[0022] Reference Figure 6 The baffle 207 is installed on the six tracked motors 102, and the rotary drill rod 206 channel is designed in the middle of the cover 2. The interior is hollow. On the one hand, this is to reduce the weight of the rotary chassis and avoid the whole device sinking due to excessive weight, which would affect the exploration efficiency. On the other hand, it is to ensure that when the rotary drill rod 3 is installed, the butterfly buffer spring 302 and the steel support 303 have enough space to release the soil stress and avoid the butterfly buffer spring 302 being damaged by excessive impact due to insufficient space.

[0023] Reference Figure 7 In the tracked walking mechanism, a double gear 103 is mounted on the output shaft of a power motor 102. An outer track 1 and an inner track 101 are respectively mounted on the double gear 103. The other end of the outer track 1 is mounted on the outer track gear, and the two ends of the inner track 101 are respectively mounted on the two double gears 103. An inner track gear 104 is mounted in the middle of the inner track 101. The inner track gear 104 is mounted on the output shaft of another power motor 102. The outer track 1, the inner track 101, and the track power motor 102 are connected by the double gear 103, and the inner track gear 104 is mounted on the inner track 101 to realize the normal operation of the track. At the same time, the use of the outer track 1 and the inner track 101 on soft rock geological conditions can avoid damaging the ground and affecting geological exploration.

[0024] Reference Figure 8 The telescopic boom 309 and the hydraulic rod 311 are fixed together on the triangular wheel 310. Through the above device, the rotary drilling rig rod 3 can be adjusted according to the actual geological conditions of soft rock. At the same time, it is connected to the rotary drilling rig straightening device 308, which can make the rotary drilling rig rod 3 work stably on soft rock strata and avoid tilting of the rotary drilling rig rod 3 due to excessive disturbance, thereby affecting the exploration operation.

[0025] Reference Figure 9 The bottom power drill bit 307 employs high-hardness alloy hobbing 315 inlay technology. The staggered array of hobbing 315 teeth covers the drill bit surface, demonstrating significant technical advantages in soft rock formation exploration. Furthermore, compared to traditional fixed-tooth structures, it reduces rotational resistance by more than 40%, while maintaining cutting efficiency through the self-sharpening design of the hobbing teeth.

[0026] The embodiments described in this specification are merely examples of implementations of the inventive concept and are for illustrative purposes only. The scope of protection of this invention should not be considered limited to the specific forms described in these embodiments; rather, it extends to equivalent technical means conceived by those skilled in the art based on the inventive concept.

Claims

1. A rotary drilling exploration device for soft rock strata, characterized in that, The system includes an excavator chassis, rotary drilling rig components, and a power supply. The rotary drilling rig components include a bottom power drill bit, a steel support, a rotary drill rod, a buffer spring, a rotary drilling rig centering device, and a power motor. The power motor is located at the top of the rotary drill rod. The buffer spring is fitted onto the upper part of the rotary drill rod, with its upper end connected to the output shaft of the power motor and its lower end connected to the upper end of the steel support. The steel support is fixedly connected to the outer wall of the rotary drill rod to transmit axial pressure and buffer vibration. The rotary drill rod is vertically arranged, with its bottom fixedly connected to the bottom power drill bit. The rotary drilling rig centering device is fitted onto the lower middle part of the rotary drill rod to maintain the vertical alignment of the drill rod. The power supply is electrically connected to the power motor. The excavator chassis has a rotary drill rod channel in the middle and is equipped with a traveling mechanism.

2. The soft rock strata advanced rotary drilling exploration device as described in claim 1, characterized in that, The lower end of the power motor is connected to the top drive, and the lower end of the top drive is connected to the upper end of the buffer spring.

3. A pre-drilling rotary drilling exploration device for soft rock strata as described in claim 1 or 2, characterized in that, The bottom power drill bit has a layer of toothed serrations on its surface.

4. A pre-drilling rotary drilling exploration device for soft rock strata as described in claim 1 or 2, characterized in that, The buffer spring is a butterfly-shaped buffer spring. The lower end of the butterfly-shaped buffer spring is connected to the steel support and assembled with the upper two sets of vibrating soil-dispersing devices. The lower set of vibrating soil-dispersing devices is installed at the bottom of the rotary drilling rod.

5. A rotary drilling exploration device for soft rock strata as described in claim 1 or 2, characterized in that, The telescopic boom and hydraulic rod are fixed together on the triangular wheel, and the telescopic boom, hydraulic rod and triangular wheel are installed together on the back of the rotary drilling rig straightening device.

6. A pre-drilling rotary drilling exploration device for soft rock strata as described in claim 1 or 2, characterized in that, The lower end of the rotary drilling rig straightening device is designed with an I-beam retainer.

7. A pre-drilling rotary drilling exploration device for soft rock strata as described in claim 1 or 2, characterized in that, The traveling mechanism is a tracked traveling mechanism, including a power motor, double gears, outer track, inner track, outer track gear, and inner track gear. A power motor is installed on the excavator chassis, and a double gear is installed on the output shaft of the power motor. The outer track and inner track are respectively mounted on the double gear. The other end of the outer track is mounted on the outer track gear. The two ends of the inner track are respectively mounted on two double gears, and the inner track gear is installed in the middle of the inner track. The inner track gear is mounted on the output shaft of another power motor.

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