A drill bit for hydrogeological drilling

Abstract

A drill bit for hydrogeological drilling comprises an outer drill bit, an inner drill bit, a transmission mechanism and a plurality of cutting mechanisms, wherein the cutting mechanism is swingably mounted at the end of the outer drill bit, the inner drill bit is slidably mounted in the outer drill bit, and the cutting mechanism is connected to the inner drill bit, and the inner drill bit slides to drive the cutting mechanism to swing, thereby changing the drilling diameter of the outer drill bit, thereby reducing the drilling area, making it easier for the outer drill bit to drill harder rock formations, improving the drilling efficiency of the drill bit, and thus improving the geological exploration efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling equipment, and in particular relates to a drill bit for hydrogeological drilling. Background Art

[0002] Geological exploration is an activity that investigates, detects, tests and studies geophysical properties, geological structures, geomorphological features, etc. The purpose of geological exploration is to obtain key information such as underground geological structure, mineral resource distribution, hydrogeological conditions, crustal stability, etc. In geological exploration, a drill is usually used to drill underground. When a traditional drill is used, it is usually driven by a drilling rig to rotate the drill to achieve drilling. When drilling into the underground rock layer, due to the different hardness of the underground rock layer, the drill efficiency will be low or the drill will be unable to drill, which will greatly increase the geological exploration cycle and reduce the efficiency of geological exploration. Summary of the invention

[0003] In view of the above shortcomings, the technical problem to be solved by the present invention is to provide a drill bit for hydrogeological drilling, so as to improve the efficiency of geological exploration.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A drill bit for hydrogeological drilling comprises an outer drill bit, an inner drill bit, a transmission mechanism and a plurality of cutting mechanisms. The cutting mechanism is swingably mounted at the end of the outer drill bit, the inner drill bit is slidably mounted in the outer drill bit, and the cutting mechanism is connected to the inner drill bit. The cutting mechanism is driven to swing by the sliding movement of the inner drill bit. The outer drill bit is fixedly connected to the transmission mechanism, and the inner drill bit is connected to the transmission mechanism. The transmission mechanism drives the inner drill bit to slide.

[0006] As a preferred solution of the present invention, a first spiral groove is provided on the outer wall of the inner drill bit, and a guide column extending into the first spiral groove is provided on the inner wall of the outer drill bit. The inner drill bit is driven to slide inside the outer drill bit through the cooperation of the guide column and the first spiral groove.

[0007] As a preferred solution of the present invention, the inner drill bit is provided with a guide surface, a second spiral groove is provided on the guide surface, one end of the cutting mechanism is slidably connected to the second spiral groove, and the cutting mechanism is driven to swing through the second spiral groove.

[0008] As a preferred solution of the present invention, the cutting mechanism includes a cutting head bracket and a cutting drill. The cutting head bracket is swingably mounted on the end of the outer drill bit, and the other end of the cutting head bracket is slidably connected to the second spiral groove.

[0009] As a preferred solution of the present invention, a connecting sleeve is slidably mounted on the inner drill bit, and the transmission mechanism is connected to the connecting sleeve.

[0010] As a preferred solution of the present invention, a drilling blade is provided at the bottom of the inner drill bit, and the cutting mechanism is adapted to the drilling blade.

[0011] As a preferred solution of the present invention, the transmission mechanism includes a transmission sleeve, a first gear set, a second gear set and a third gear set. The first gear set and the third gear set are respectively installed at both ends of the transmission sleeve, and the first gear set and the third gear set are connected through the third gear set. The third gear set is adjustably installed on the transmission sleeve, and the first gear set is connected to the third gear set by adjusting the third gear set, or the first gear set is connected to the third gear set through the second gear set.

[0012] As a preferred solution of the present invention, a plug-in column is provided in the first gear set, and a slot adapted to the plug-in column is provided in the third gear set, and the first gear set and the third gear set are connected by connecting the plug-in column and the slot.

[0013] As a preferred solution of the present invention, the second gear set includes a screw shaft and a second gear rotatably mounted on the screw shaft, and the screw shaft is adjustably mounted on the transmission sleeve via a thread.

[0014] As a preferred solution of the present invention, a sleeve scraper is provided on the outer side of the outer drill bit.

[0015] The beneficial effect of the present invention is that the cutting mechanism is driven to swing by the sliding of the inner drill bit, thereby changing the drilling diameter of the outer drill bit, thereby reducing the drilling area, making it easier for the outer drill bit to drill harder rock formations, improving the drilling efficiency of the drill bit, and thus improving the efficiency of geological exploration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the drill bit.

[0017] Figure 2 It is a cross-sectional view of the drill bit structure.

[0018] Figure 3 It is a schematic diagram of the structure of the inner drill bit.

[0019] Figure 4 It is a schematic diagram of the structure of the outer drill bit.

[0020] Reference numerals: outer drill bit 1, guide column 1-1, sleeve scraper 1-2, swing groove 1-3, discharge groove 1-4, inner drill bit 2, first spiral groove 2-1, guide surface 2-2, second spiral groove 2-3, drilling blade 2-4, cutting mechanism 3, cutting head bracket 3-1, rotating shaft 3-2, cutting drill 3-3, transmission mechanism 4, transmission sleeve 4-1, first gear set 4-2, second gear set 4-3, third gear set 4-4, plug-in column 4-5, slot 4-6, screw shaft 4-7,

[0021] The second gear 4-8, the first rotating shaft 4-9, the first gear 4-10, the thrust bearing 4-11, the third rotating shaft 4-12, the third gear 4-13, the mounting sleeve 4-14, the air hole 4-15, the outer connecting tube 5, the inner connecting tube 6, the connecting sleeve 7, the sleeve 8, and the abutting sleeve 9. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like Figure 1 As shown, a drill bit for hydrogeological drilling includes an outer drill bit 1, an inner drill bit 2, a transmission mechanism 4 and a plurality of cutting mechanisms 3. The cutting mechanism 3 is swingably mounted at the end of the outer drill bit 1, and the inner drill bit 2 is slidably mounted in the outer drill bit 1, and the cutting mechanism 3 is connected to the inner drill bit 2. The inner drill bit 2 slides to drive the cutting mechanism 3 to swing, thereby changing the drilling diameter of the outer drill bit 1, thereby reducing the drilling area, making it easier for the outer drill bit 1 to drill harder rock formations, thereby improving the drilling efficiency of the drill bit, and thus improving the geological exploration efficiency.

[0024] The outer drill bit 1 is fixedly connected to the transmission mechanism 4 through the outer connecting tube 5. When the transmission mechanism 4 rotates, the outer drill bit 1 is driven to rotate. The inner drill bit 2 is connected to the rotating part of the transmission mechanism 4 through the inner connecting tube 6, and the inner drill bit 2 is driven to rotate through the rotating part of the transmission mechanism 4. At the same time, a first spiral groove 2-1 is provided on the outer side wall of the inner drill bit 2, and a guide column 1-1 extending into the first spiral groove 2-1 is provided on the inner side wall of the outer drill bit 1. When the inner drill bit 2 rotates relatively, the guide column 1-1 and the first spiral groove 2-1 cooperate to drive the inner drill bit 2 to slide axially in the outer drill bit 1, thereby driving the cutting mechanism 3 to swing.

[0025] like Figure 2-Figure 3 As shown, the inner drill bit 2 is provided with a conical guide surface 2-2, and a second spiral groove 2-3 is provided on the guide surface 2-2. One end of the cutting mechanism 3 is slidably connected with the second spiral groove 2-3. When the inner drill bit 2 slides in the outer drill bit 1, the second spiral groove 2-3 moves relatively. When the second spiral groove 2-3 moves, the end of the cutting mechanism 3 is driven to move, thereby driving the cutting mechanism 3 to swing. The drilling area of ​​the drill tip is changed by the swing of the cutting mechanism 3, thereby changing the drilling efficiency. Preferably, the rotation direction and rotation angle of the second spiral groove 2-3 are adapted to the first spiral groove 2-1, ensuring that the inner drill bit 2 can stably drive the cutting mechanism 3 to swing when rotating.

[0026] like Figure 2As shown, the cutting mechanism 3 includes a cutting head bracket 3-1 and a cutting drill 3-3. The cutting head bracket 3-1 is swingably mounted on the end of the outer drill bit 1 through a rotating shaft 3-2. The other end of the cutting head bracket 3-1 is slidingly connected to the second spiral groove 2-3, and the cutting head bracket 3-1 is driven to swing through the second spiral groove 2-3.

[0027] In order to ensure that the inner drill bit 2 is connected to the inner connecting tube 6 to transmit power, and to ensure that the inner drill bit 2 can move axially relative to the outer drill bit 1, a connecting sleeve 7 is slidably installed on the inner drill bit 2. The outer wall of the connecting sleeve 7 is a spline structure to ensure that the connecting sleeve 7 can drive the inner drill bit 2 to rotate. The transmission mechanism 4 is connected to the connecting sleeve 7 through the inner connecting tube 6.

[0028] In order to ensure that the drilled rock and soil layer can be received in the inner connecting rod 6, a drilling blade 2-4 is provided at the bottom of the inner drill bit 2, and the cutting mechanism 3 is adapted to the drilling blade 2-4, that is, when the cutting mechanism 3 is swung to the minimum angle, the diameter of the rock and soil layer produced by the cutting of multiple cutting mechanisms 3 is consistent with the diameter of the rock and soil layer produced by the cutting of the drilling blade 2-4; when the swing angle of the cutting mechanism 3 is not at the minimum angle position, the diameter of the rock and soil layer produced by the cutting of multiple cutting mechanisms 3 is greater than the diameter of the rock and soil layer produced by the cutting of the drilling blade 2-4, and the rock and soil layer is cut by the drilling blade 2-4 and moves into the inner connecting rod 6.

[0029] like Figure 2 As shown, the transmission mechanism 4 includes a transmission sleeve 4-1, a first gear set 4-2, a second gear set 4-3 and a third gear set 4-4. The first gear set 4-2 and the third gear set 4-4 are respectively mounted on both ends of the transmission sleeve 4-1, and the first gear set 4-2 and the third gear set 4-4 are connected through the third gear set 4-4. The third gear set 4-4 is adjustably mounted on the transmission sleeve 4-1. When the second gear set 4-3 is engaged with the first gear set 4-2 and the third gear set 4-4, the rotation directions of the first gear set 4-2 and the third gear set 4-4 are opposite. When the second gear set 4-3 is separated from the first gear set 4-2 and the third gear set 4-4, the first gear set 4-2 is connected to the third gear set 4-4, so that the first gear set 4-2 and the third gear set 4-4 have the same rotation direction, thereby realizing the forward and reverse rotation of the inner drill bit 2.

[0030] The first gear assembly 4-2 includes a first rotating shaft 4-9 and a first gear 4-10. The first rotating shaft 4-9 is slidably mounted on the transmission sleeve 4-1, and the first gear 4-10 is mounted on the first rotating shaft 4-9. Preferably, a thrust bearing 4-11 is provided on the end face of the first gear 4-10, and the thrust bearing 4-11 abuts against the transmission box 4-1. When the first gear assembly 4-2 and the second gear assembly 4-3 are connected, the first gear 4-10 is positioned by the inner wall of the transmission sleeve 4-1 to ensure that the first gear 4-10 can be stably connected to the second gear assembly 4-3.

[0031] The second gear set 4-3 includes a screw shaft 4-7 and a second gear 4-8 rotatably mounted on the screw shaft 4-7. The screw shaft 4-7 is adjustable by thread on the transmission sleeve 4-1. The position of the second gear 4-8 is adjusted by the screw shaft 4-7, thereby realizing the connection or separation of the second gear 4-8 with the first gear set 4-2 and the third gear set 4-4.

[0032] The third gear set 4-4 includes a third shaft 4-12 and a third gear 4-13. The third shaft 4-12 is rotatably mounted on the transmission sleeve 4-1. The third gear 4-13 is connected to the third shaft 4-12 to drive the third shaft 4-12 to rotate. A mounting sleeve 4-14 is connected to the bottom of the third shaft 4-12, and the mounting sleeve 4-14 is connected to the inner connecting pipe 6. In some preferred embodiments, an air hole 4-15 is provided at the top of the mounting sleeve 4-14. During the drilling process, the drill bit discharges the air in the drill bit through the air hole 4-15, so that the rock and soil are filled in the inner connecting pipe 6. Since the aperture of the air hole 4-15 is small, when the drill bit is lifted, the inner connecting pipe 6 can be in a negative pressure state for a short time to prevent the rock and soil from falling from the inner connecting pipe 6.

[0033] A plug-in column 4-5 is provided on the side of the first gear 4-10 facing the third gear set 4-4, and a slot 4-6 is provided on the side of the third gear 4-13 facing the first gear 4-10. The slot 4-6 is adapted to the plug-in column 4-5, that is, the slot 4-6 and the plug-in column 4-5 are plugged in by lifting and lowering the first gear assembly 4-2.

[0034] In this embodiment, the external connecting tube 5 is fixedly connected to the transmission sleeve 4-1, and the external drill bit 1 is driven to rotate by rotating the transmission sleeve 4-1. The internal connecting tube 6 is connected to the installation sleeve 4-14, and the internal drill bit 2 is driven to rotate by the gear structure in the transmission sleeve 4-1.

[0035] like Figure 4 As shown, a swing groove 1-3 and a discharge groove 1-4 are provided on the inner wall of the outer drill bit 1, the cutting head bracket 3-1 is swingably installed in the swing groove 1-3, and the discharge groove 1-4 is arranged above the swing groove 1-3, so as to discharge the waste chips between the inner drill bit 2 and the outer drill bit 1 outside the outer drill bit 1, ensuring that the waste chips will not affect the swing of the cutting head bracket 3-1.

[0036] A sleeve scraper 1-2 is provided on the outside of the outer drill bit 1. The sleeve scraper 1-2 is a triangular structure with a width increasing from bottom to top. A sleeve 8 is provided at the upper end of the sleeve scraper 1-2. An abutment sleeve 9 is provided on the outside of the transmission sleeve 4-1. The abutment sleeve 9 abuts against the top of the sleeve 8 to facilitate the placement of the sleeve 8 in the hole produced by drilling.

[0037] As a preferred embodiment, the outer connecting pipe 5, the inner connecting pipe 6 and the sleeve 8 are all extendable pipe structures.

[0038] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0039] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A drill bit for hydrogeological drilling, characterized in that: The invention comprises an outer drill bit (1), an inner drill bit (2), a transmission mechanism (4) and a plurality of cutting mechanisms (3), wherein the cutting mechanism (3) is swingably mounted at the end of the outer drill bit (1), the inner drill bit (2) is slidably mounted in the outer drill bit (1), and the cutting mechanism (3) is connected to the inner drill bit (2), and the cutting mechanism (3) is driven to swing by the sliding movement of the inner drill bit (2), the outer drill bit (1) is fixedly connected to the transmission mechanism (4), and the inner drill bit (2) is connected to the transmission mechanism (4), and the inner drill bit (2) is driven to slide by the transmission mechanism (4); The outer side wall of the inner drill bit (2) is provided with a first spiral groove (2-1), and the inner side wall of the outer drill bit (1) is provided with a guide column (1-1) extending into the first spiral groove (2-1), and the inner drill bit (2) is driven to slide inside the outer drill bit (1) through the cooperation of the guide column (1-1) and the first spiral groove (2-1); The inner drill bit (2) is provided with a guide surface (2-2), and a second spiral groove (2-3) is provided on the guide surface (2-2); one end of the cutting mechanism (3) is slidably connected to the second spiral groove (2-3), and the cutting mechanism (3) is driven to swing via the second spiral groove (2-3); The cutting mechanism (3) comprises a cutting head support (3-1) and a cutting drill (3-3); the cutting head support (3-1) is swingably mounted on the end of the outer drill bit (1); the other end of the cutting head support (3-1) is slidably connected to the second spiral groove (2-3); The transmission mechanism (4) comprises a transmission sleeve (4-1), a first gear set (4-2), a second gear set (4-3) and a third gear set (4-4); the first gear set (4-2) and the third gear set (4-4) are respectively mounted at two ends of the transmission sleeve (4-1), and the first gear set (4-2) and the third gear set (4-4) are connected via the second gear set (4-3); the third gear set (4-4) is adjustably mounted on the transmission sleeve (4-1); by adjusting the third gear set (4-4), the first gear set (4-2) is connected to the third gear set (4-4) or the first gear set (4-2) is connected to the third gear set (4-4) via the second gear set (4-3); The second gear set (4-3) comprises a screw shaft (4-7) and a second gear (4-8) rotatably mounted on the screw shaft (4-7); the screw shaft (4-7) is adjustably mounted on the transmission sleeve (4-1) via a thread.

2. A drill bit for hydrogeological drilling according to claim 1, characterized in that: A connecting sleeve (7) is slidably mounted on the inner drill bit (2), and the transmission mechanism (4) is connected to the connecting sleeve (7).

3. A drill bit for hydrogeological drilling according to claim 1, characterized in that: The bottom of the inner drill bit (2) is provided with a drilling blade (2-4), and the cutting mechanism (3) is adapted to the drilling blade (2-4).

4. A drill bit for hydrogeological drilling according to claim 1, characterized in that: A plug-in column (4-5) is provided in the first gear set (4-2), and a slot (4-6) adapted to the plug-in column (4-5) is provided in the third gear set (4-4); the first gear set (4-2) and the third gear set (4-4) are connected via the plug-in column (4-5) and the slot (4-6).

5. A drill bit for hydrogeological drilling according to claim 1, characterized in that: A sleeve scraper (1-2) is provided on the outer side of the outer drill bit (1).

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