Rock core drill bit and drilling equipment for iron ore

Abstract

The invention relates to the technical field of drilling equipment, in particular to a core drill bit for iron ore and drilling equipment, which comprises a drill bit main body for iron ore core processing and sampling, coarse crushing teeth uniformly fixed at the lower end of the drill bit main body, and reinforcing blocks fixed among the coarse crushing teeth, fine crushing teeth are evenly fixed to the lower end face of the reinforcing block, the coarse crushing teeth at the lower end of the drill bit body firstly conduct coarse crushing on iron ore, the reinforcing block enhances the strength of the coarse crushing teeth, then the fine crushing teeth on the lower end face of the drill bit body conduct fine crushing, and after the coarse crushing teeth complete primary crushing, the fine crushing teeth can follow up in time; meanwhile, the fine crushing teeth make preparations for formation of the rock core, the graded crushing mode can improve the drilling efficiency and reduce the drilling time, the upper inclined surface and the lower inclined surface of the elastic supporting block are beneficial to smooth entering of the rock core into the rock core barrel, and the rock core is prevented from falling off due to self weight when the rock core barrel ascends; and the reliability of rock core collection is ensured.

Description

Technical Field

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

[0002] In the global exploration and development of iron ore resources, core drilling is a key means of obtaining underground geological information. The performance of core drilling equipment directly determines the accuracy of resource exploration and the efficiency of mining. Core samples enable geological engineers to accurately analyze the mineral composition, grade distribution, and geological structure of iron ore layers, providing key information for mine plan design and reserve assessment. As iron ore mining gradually expands into deeper and more complex geological areas, higher requirements are placed on the efficiency, reliability, and integrity of core drilling equipment.

[0003] Traditional core drill bits often use a single crushing method when crushing iron ore rocks, which makes it difficult to efficiently cope with iron ore layers of different hardness and structure. The core barrel on the drill bit is usually an integral structure, which is difficult to directly disassemble and extract the material. At the same time, the drill bit and the core barrel are usually connected by threads. However, when the drill bit contacts the geology and rotates, the threads are further tightened, making subsequent disassembly more difficult. Finally, when the core enters the core barrel, the core is easily fallen off due to its own weight, making it inconvenient to extract the material.

[0004] Based on this, the present invention discloses a core drill bit and drilling equipment for iron ore. Summary of the Invention

[0005] To address the problems in the prior art of the integrated structure of the drill bit and core barrel, which result in difficulty in extracting material and the phenomenon of natural core shedding due to the weight of the core, the present invention provides a core drill bit for iron ore, comprising a drill bit body for processing and sampling iron ore cores, coarse crushing teeth uniformly fixed to the lower end of the drill bit body, reinforcement blocks fixed between the coarse crushing teeth, and fine crushing teeth uniformly fixed to the lower end surface of the reinforcement blocks; The upper end of the drill bit body is provided with a first core tube connected by a threaded assembly, a movable groove is opened inside the first core tube, a movable ring is slidably connected to the inner wall of the movable groove, and a locking rod is evenly fixed on the lower end surface of the movable ring; An insert shell is fixed to the upper end of the first core tube, a first rubber ring is evenly fixed to the inner wall of the insert shell, a second core tube is provided on the outer side of the insert shell, a mounting block is fixed to the top end of the second core tube, a splint connected by an opening and closing component is provided inside the mounting block, a support shell is fixed to the lower end face of the mounting block, a sliding rod connected by a reciprocating component is provided inside the support shell, and an elastic knocking rod connected by an elastic component is provided at the lower end of the sliding rod.

[0006] Since iron ore drilling requires efficient rock crushing and stable core collection, this technical solution adopts a design that combines coarse and fine crushing teeth, and is equipped with a core tube system with a multi-connection stable structure and auxiliary coring device.

[0007] As a further improvement to this technical solution, coarse and fine crushing teeth are installed at the lower end of the drill bit body. This first coarsely crushes the iron ore, followed by fine crushing, improving drilling efficiency and reducing drilling time. The drive unit rotates the drill bit body, allowing the coarse crushing teeth to initially crush the iron ore. Reinforcement blocks strengthen the coarse crushing teeth, while the fine crushing teeth further crush the rock. This graded crushing method effectively increases overall drilling speed.

[0008] On this basis, since the connection between the drill bit and the core barrel needs to remain stable during drilling to prevent the loosening of the thread from affecting drilling, this technical solution uses a combination of a threaded component and a clamping component to enhance the stability of the connection. The screw tube at the upper end of the drill bit body is screwed into the thread groove on the inner wall of the first core barrel to achieve a preliminary threaded connection, and then further locked by the locking plate, bolt, movable ring and locking rod in the cavity groove to firmly connect the first core barrel to the drill bit body to prevent the thread from loosening during drilling.

[0009] As a further improvement of the present technical solution, an insertion shell and a positioning rod are provided at the upper end of the first core tube, and corresponding insertion grooves and positioning grooves are provided at the bottom of the second core tube, and staggered rubber rings are provided in the insertion shell and the insertion groove respectively to improve the tightness after insertion. During operation, the insertion shell is inserted into the insertion groove, and the positioning rod is inserted into the positioning groove to achieve precise positioning and tight connection. When disassembling, the internal material can be removed by separating them with force, which is convenient for material removal.

[0010] As a further improvement of this technical solution, an opening and closing assembly is set in the mounting block, and the splint is driven to open and close by an electric push rod, a slide plate, a movable rod, etc. After the core enters the second core tube, the electric push rod is extended and retracted to push the slide plate, and the slide plate drives the splint to slide along the slide groove through the movable rod. The four groups of splints surround and clamp the core to further prevent the material from falling off directly.

[0011] In order to remove the core more smoothly, this technical solution sets a reciprocating component and an elastic component in the supporting shell. The reciprocating screw is driven by a micro motor to rotate, so that the movable block moves up and down, and then the sliding rod and the elastic knocking rod are driven by the vertical rod and the lifting plate to knock the core tube. The shock-absorbing spring and the damping support rod in the knocking shell at the lower end of the sliding rod buffer the vibration, and the elastic knocking rod helps to remove the core smoothly.

[0012] A second object of the present invention is to provide a drilling device for use with a core drill bit; As a further improvement of this technical solution, the drilling equipment includes a mounting bracket, on which a hydraulic rod, a drive seat, a sliding block and a positioning pulley are arranged to realize the lifting and lowering of the drill bit body. The hydraulic rod is extended and retracted to drive the drive seat to move up and down, and the sliding block and the positioning pulley slide in the vertical groove to ensure that the lifting process is stable and the operation is flexible to adapt to different drilling needs.

[0013] Compared with the prior art, the present invention has the following beneficial effects: First, this kind of core drill bit and drilling equipment for iron ore realizes drilling efficiency. The coarse crushing teeth at the lower end of the drill bit body first coarsely crush the iron ore, and the reinforcing block enhances the strength of the coarse crushing teeth. The fine crushing teeth at the lower end face then perform fine crushing. When the coarse crushing teeth complete the initial crushing, the fine crushing teeth can follow up in time to further refine the crushed rock. At the same time, the fine crushing teeth prepare for the formation of the core. The graded crushing method can improve drilling efficiency and reduce drilling time. An elastic support block is arranged in the contraction groove inside the drill bit body. The upper and lower inclined surfaces of the elastic support block help the core to enter the core tube smoothly. At the same time, the elastic support block supports the core to prevent the core from falling off due to its own weight when the core tube rises, thereby ensuring the reliability of core collection.

[0014] Secondly, the core drill bit and drilling equipment used in iron ore realize the core material extraction work. The opening and closing components in the mounting block drive the clamping plate to open and close through the electric push rod, slide plate, movable rod, etc., and clamp the core after the core enters the second core tube to prevent the material from falling off directly; the reciprocating component drives the sliding rod and elastic knocking rod to knock the core tube through the reciprocating screw rod, movable block, lifting plate, etc., to help the core to be smoothly removed, thereby improving the material extraction efficiency.

[0015] Third, in the core drill bit and drilling equipment for iron ore, the modularization of the drill bit equipment is realized, the drill bit body and the first core tube are initially threadedly connected by a screw tube and a thread groove, and the locking plate, bolt, movable ring and locking rod in the cavity groove are used to further enhance the stability of the connection, effectively preventing the loosening of the thread during drilling and preventing the excessive tight fit of the thread due to the rotation of the drill bit after the threaded connection, ensuring the smooth progress of the drilling work, the insertion shell of the first core tube cooperates with the insertion groove of the second core tube, the positioning rod and the positioning groove realize precise positioning, the first rubber ring and the second rubber ring are staggered up and down, which improves the tightness after insertion, and can be separated during disassembly to directly take out the internal material. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the drive seat of the present invention; Figure 3A schematic structural diagram of an insert housing of the present invention; Figure 4 is a schematic structural diagram of the first core barrel of the present invention; Figure 5 It is a structural schematic diagram of the movable ring of the present invention; Figure 6 It is a structural schematic diagram of the locking groove of the present invention; Figure 7 This is a schematic structural diagram of the fine crushing teeth of the present invention; Figure 8 It is a structural schematic diagram of the elastic support block of the present invention; Figure 9 It is an enlarged structural diagram of the fixing plate of the present invention; Figure 10 It is a structural schematic diagram of the splint of the present invention; Figure 11 This is a schematic diagram of the mounting base structure of the present invention; Figure 12 It is a structural schematic diagram of the elastic knocking rod of the present invention.

[0017] The meaning of each mark in the figure is: 1. Drill bit body; 2. First core barrel; 201. Second core barrel; 202. Insert housing; 203. Positioning rod; 204. First rubber ring; 205. Insert slot; 206. Second rubber ring; 207. Positioning slot; 3. Screw; 301. Threaded slot; 302. Movable slot; 303. Movable ring; 304. Locking rod; 305. Cavity slot; 306. Locking plate; 307. Locking slot; 4. Coarse crushing teeth; 401. Reinforcement block; 402. Fine crushing teeth; 5. Elastic support block; 6. Mounting block; 601. Mounting plate; 602. Electric Push rod; 603, slide plate; 604, movable rod; 605, fixed plate; 606, slide groove; 607, slider; 608, splint; 7, support shell; 701, rectangular groove; 702, mounting seat; 703, reciprocating screw rod; 704, movable block; 705, vertical rod; 706, lifting plate; 707, slide rod; 708, positioning plate; 709, knocking shell; 8, elastic knocking rod; 9, mounting bracket; 901, top plate; 902, hydraulic rod; 903, drive seat; 904, sliding block; 905, positioning pulley; 906, vertical groove. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] When the existing core drill bit is working, the drill bit and the core barrel are usually integrated into one structure, which makes it difficult to remove the material and causes the core to fall off naturally due to its weight.

[0020] To this end, the present invention provides a core drill bit for iron ore, see Figure 1 As shown, it includes a drill bit body 1 for iron ore core processing and sampling, coarse crushing teeth 4 are evenly fixed at the lower end of the drill bit body 1, reinforcement blocks 401 are fixed between the coarse crushing teeth 4, and fine crushing teeth 402 are evenly fixed on the lower end surface of the reinforcement block 401. The drill bit body 1 is driven to rotate by a driving device, and the coarse crushing teeth 4 at the lower end of the drill bit body 1 coarsely crush the iron ore, the reinforcement blocks 401 enhance the strength of the coarse crushing teeth 4, and the fine crushing teeth 402 on the lower end surface of the reinforcement block 401 finely crush the iron ore, thereby improving drilling efficiency. The combination of the coarse crushing teeth 4 and the fine crushing teeth 402 can first coarsely crush the iron ore and then finely crush it, thereby improving drilling efficiency and reducing drilling time; The upper end of the drill bit body 1 is provided with a first core tube 2 connected by a threaded assembly. The interior of the first core tube 2 is provided with a movable groove 302. The inner wall of the movable groove 302 is slidably connected to a movable ring 303. The lower end surface of the movable ring 303 is evenly fixed with a locking rod 304. An insert shell 202 is fixed to the upper end of the first core tube 2, a first rubber ring 204 is evenly fixed to the inner wall of the insert shell 202, a second core tube 201 is provided on the outer side of the insert shell 202, a mounting block 6 is fixed to the top end of the second core tube 201, a splint 608 connected by an opening and closing component is provided inside the mounting block 6, a support shell 7 is fixed to the lower end face of the mounting block 6, a slide rod 707 connected by a reciprocating component is provided inside the support shell 7, and an elastic knocking rod 8 connected by an elastic component is provided at the lower end of the slide rod 707.

[0021] For details, see Figure 4 and Figure 5 As shown, the threaded assembly includes a screw tube 3 fixed at the upper end of the drill bit body 1, the first core tube 2 is located at the upper end of the drill bit body 1, and the inner wall of the first core tube 2 is provided with a threaded groove 301 which is threadedly connected to the screw tube 3. The first core tube 2 is locked with the drill bit body 1 through the threaded groove 301 and the screw tube 3. The upper end of the screw tube 3 is provided with a locking assembly for locking. The locking assembly includes locking grooves 307 evenly opened on the upper end surface of the screw tube 3, and cavity grooves 305 are provided on both sides of the first core tube 2. The interior of the cavity groove 305 is slidably connected with a locking plate 306, and the interior of the locking plate 306 is provided with a bolt connected to the first core tube 2. The locking plate 306 extends to the interior of the movable groove 302 and is fixedly connected to the movable ring 303.

[0022] During operation, the screw tube 3 at the upper end of the drill bit body 1 is screwed into the thread groove 301 on the inner wall of the first core tube 2 to achieve a preliminary threaded connection. Then, the locking plate 306 in the cavity groove 305 is used to fix it to the first core tube 2 with bolts. The locking plate 306 extends into the movable groove 302 and is fixedly connected to the movable ring 303. The locking rod 304 on the lower end face of the movable ring 303 further enhances the connection stability, so that the first core tube 2 and the drill bit body 1 are firmly locked, the connection stability is strengthened, and the thread is prevented from loosening during drilling.

[0023] For further information, see Figure 3 As shown, the upper end of the first core tube 2 is located outside the insertion shell 202 and is fixed with a positioning rod 203. The bottom of the second core tube 201 is provided with an insertion groove 205 corresponding to the insertion shell 202. The inner wall of the insertion groove 205 is evenly fixed with second rubber rings 206. The first rubber ring 204 and the second rubber ring 206 are staggered in the upper and lower parts. The lower end surface of the second core tube 201 is located on the outer circle of the insertion groove 205 and is evenly provided with positioning grooves 207 corresponding to the positioning rod 203.

[0024] During operation, the insertion shell 202 at the upper end of the first core tube 2 is inserted into the insertion groove 205 at the bottom of the second core tube 201, and the positioning rod 203 on the first core tube 2 is inserted into the positioning groove 207 on the lower end surface of the second core tube 201 to achieve positioning. The first rubber ring 204 on the inner wall of the insertion shell 202 and the second rubber ring 206 on the inner wall of the insertion groove 205 are arranged alternately up and down to improve the tightness after insertion. Then, when disassembling, the first core tube 2 and the second core tube 201 are separated by force to remove the internal material, thereby facilitating material removal.

[0025] Among them, see Figure 8 As shown, six groups of contraction grooves are evenly opened inside the drill body 1, and elastic support blocks 5 connected by springs are arranged inside the contraction grooves.

[0026] During operation, during the drilling process, the core enters the first core tube 2 and the second core tube 201, and the compression spring in the contraction groove inside the drill bit body 1 pushes the elastic support block 5. The upper and lower inclined surfaces of the elastic support block 5 help the core to enter the core tube smoothly. At the same time, the elastic support block 5 plays a certain supporting role on the core, preventing the core tube from naturally falling off due to the weight of the material when it rises, causing damage.

[0027] For further information, see Figure 9 and Figure 10As shown, the opening and closing assembly includes a fixed plate 605 fixed to the inner wall of the mounting block 6, a slide groove 606 is provided inside the fixed plate 605, a slider 607 is slidably connected to the inner wall of the slide groove 606, a splint 608 is located at one end of the slider 607 and is fixedly connected, four groups of splints 608 are provided, a pushing assembly for opening and closing is provided on the splint 608, the pushing assembly includes a movable rod 604 rotatably connected to the upper end of the splint 608 by a rotating shaft, a mounting plate 601 is provided inside the mounting block 6, and four groups of the mounting plate 601 are provided. An electric push rod 602 is fixed through the end, and a slide 603 is fixed to the telescopic end of the electric push rod 602. The outer wall of the slide 603 is provided with a rotating shaft and is rotatably connected to the other end of the movable rod 604. After the core enters the second core tube 201, the electric push rod 602 in the mounting block 6 is extended and retracted to push the slide 603. The slide 603 drives the splint 608 through the movable rod 604 and slides along the slide groove 606 of the fixed plate 605. The four groups of splints 608 surround and clamp the core to further prevent the material from falling off directly.

[0028] Among them, see Figure 11 and Figure 12 As shown, the reciprocating assembly includes a rectangular groove 701 fixed inside the supporting shell 7, a mounting seat 702 is fixed inside the rectangular groove 701, a reciprocating screw rod 703 is rotatably connected inside the mounting seat 702, a movable block 704 is threadedly connected to the outer wall of the reciprocating screw rod 703, and the movable block 704 is slidably connected to the inner wall of the mounting seat 702, vertical rods 705 are fixed at both ends of the movable block 704, a lifting plate 706 is fixed at the lower end of the vertical rod 705, a sliding rod 707 is located at the lower end surface of the lifting plate 706 and is fixedly connected, a positioning plate 708 is fixed to the lower end of the supporting shell 7, and the sliding rod 707 is slidably connected to the positioning plate 708, and the elastic assembly The parts include a knocking shell 709 fixed at the lower end of the slide rod 707, an elastic knocking rod 8 is arranged inside the knocking shell 709, the reciprocating screw 703 in the mounting seat 702 is rotated by a micro motor, driving the movable block 704 to move up and down, the movable block 704 drives the lifting plate 706 to move up and down through the vertical rod 705, and the lifting plate 706 drives the slide rod 707 to slide in the positioning plate 708, and the elastic knocking rod 8 in the knocking shell 709 at the lower end of the slide rod 707 knocks the core material, wherein the elastic knocking rod 8 is provided with a shock-absorbing spring and a damping support rod to buffer vibration, and the elastic knocking rod 8 knocks the core tube to help the core be taken out smoothly.

[0029] For further information, see Figure 1 and Figure 2As shown, the device also includes a drilling equipment used in conjunction with the core drill bit, which includes a mounting bracket 9, wherein a top plate 901 is fixed to the top of the mounting bracket 9, a hydraulic rod 902 is fixed inside the top plate 901, and a driving seat 903 is fixed to the telescopic end of the hydraulic rod 902, a sliding block 904 is fixed on the inner side of the driving seat 903, and a positioning pulley 905 is provided on the inner side of the sliding block 904. A vertical groove 906 sliding with the positioning pulley 905 is opened on the inner wall of the mounting bracket 9, and the hydraulic rod 902 on the mounting bracket 9 is extended and retracted to drive the driving seat 903 to move up and down, and the sliding block 904 and the positioning pulley 905 on the inner wall of the driving seat 903 slide in the vertical groove 906 on the inner wall of the mounting bracket 9 to realize the lifting and lowering of the drill bit body 1 and complete the drilling action. The design of the hydraulic rod 902 and the driving seat 903 can realize the lifting and lowering of the drill bit body 1, and the positioning pulley 905 and the vertical groove 906 ensure the stability of the lifting process, flexible operation, and adaptability to different drilling needs.

[0030] In summary, the problem of difficulty in extracting material and natural falling of the core due to the weight of the core caused by the existing integrated structure of the drill bit and the core barrel is effectively solved.

[0031] Working principle: First, the driving device drives the drill bit body 1 to rotate, and the coarse crushing teeth 4 at the lower end of the drill bit body 1 coarsely crush the iron ore. The reinforcing block 401 enhances the strength of the coarse crushing teeth 4, and the fine crushing teeth 402 at its lower end face finely crush the iron ore, thereby improving drilling efficiency. The upper end of the drill bit body 1 is connected to the first core barrel 2 through a threaded assembly, and the spiral tube 3 at the upper end of the drill bit body 1 is screwed into the thread groove 301 on the inner wall of the first core barrel 2 to achieve a preliminary threaded connection. Then, the locking plate 306 in the cavity groove 305 is used to fix it to the first core barrel 2 with bolts. The locking plate 306 extends into the movable groove 302 and is fixedly connected to the movable ring 303. The locking rod 304 on the lower end face of the movable ring 303 further enhances the connection stability, so that the first core barrel 2 and the drill bit body 1 are firmly locked. Then, the insertion shell 202 at the upper end of the first core tube 2 is inserted into the insertion groove 205 at the bottom of the second core tube 201, and the positioning rod 203 on the first core tube 2 is inserted into the positioning groove 207 on the lower end surface of the second core tube 201 to achieve positioning. The first rubber ring 204 on the inner wall of the insertion shell 202 and the second rubber ring 206 on the inner wall of the insertion groove 205 are arranged alternately up and down to improve the tightness after insertion. During the drilling process, the core enters the first core tube 2 and the second core tube 201, and the compression spring in the contraction groove inside the drill bit body 1 pushes the elastic support block 5, which plays a certain supporting role on the core; When the core enters the second core tube 201, the electric push rod 602 in the mounting block 6 is extended and retracted to push the slide plate 603. The slide plate 603 drives the clamping plate 608 to slide along the slide groove 606 of the fixed plate 605 through the movable rod 604. The four groups of clamping plates 608 surround and clamp the core. When the core needs to be taken out, the reciprocating screw rod 703 in the mounting seat 702 is rotated by the micro motor to drive the movable block 704 to move up and down. The movable block 704 drives the lifting plate 7 through the vertical rod 705. 06 moves up and down, the lifting plate 706 drives the slide bar 707 to slide in the positioning plate 708, and the elastic knocking rod 8 at the lower end of the slide bar 707 knocks the core tube to help the core to be taken out smoothly. At the same time, the hydraulic rod 902 on the mounting bracket 9 is extended and retracted, driving the driving seat 903 to move up and down, and the sliding block 904 and the positioning pulley 905 on the inner side of the driving seat 903 slide in the vertical groove 906 on the inner wall of the mounting bracket 9, realizing the lifting of the drill body 1 and completing the drilling action.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A core drill bit for iron ore, comprising a drill bit body (1) for iron ore core processing and sampling, characterized in that: Coarse crushing teeth (4) are evenly fixed at the lower end of the drill bit body (1), reinforcement blocks (401) are fixed between the coarse crushing teeth (4), and fine crushing teeth (402) are evenly fixed on the lower end surface of the reinforcement blocks (401); The upper end of the drill bit body (1) is provided with a first core tube (2) connected via a threaded assembly, a movable groove (302) is provided inside the first core tube (2), a movable ring (303) is slidably connected to the inner wall of the movable groove (302), and a locking rod (304) is evenly fixed to the lower end surface of the movable ring (303); An insert shell (202) is fixed to the upper end of the first core tube (2), a first rubber ring (204) is evenly fixed to the inner wall of the insert shell (202), a second core tube (201) is provided on the outer side of the insert shell (202), a mounting block (6) is fixed to the top end of the second core tube (201), a clamping plate (608) connected by an opening and closing component is provided inside the mounting block (6), a supporting shell (7) is fixed to the lower end face of the mounting block (6), a sliding rod (707) connected by a reciprocating component is provided inside the supporting shell (7), and an elastic knocking rod (8) connected by an elastic component is provided at the lower end of the sliding rod (707).

2. The core drill bit for iron ore according to claim 1, characterized in that: The threaded assembly comprises a screw tube (3) fixed at the upper end of the drill bit body (1); the first core tube (2) is located at the upper end of the drill bit body (1); a screw groove (301) is provided on the inner wall of the first core tube (2) and is threadedly connected to the screw tube (3); the first core tube (2) is locked with the drill bit body (1) via the screw groove (301) and the screw tube (3); and a locking assembly for locking is provided at the upper end of the screw tube (3).

3. The core drill bit for iron ore according to claim 2, characterized in that: The locking assembly includes locking grooves (307) uniformly formed on the upper end surface of the screw tube (3), cavity grooves (305) are formed on both sides of the first core tube (2), a locking plate (306) is slidably connected to the interior of the cavity groove (305), a bolt connected to the first core tube (2) is provided inside the locking plate (306), and the locking plate (306) extends to the interior of the movable groove (302) and is fixedly connected to the movable ring (303).

4. The core drill bit for iron ore according to claim 1, characterized in that: The upper end of the first core tube (2) is located on the outside of the insertion shell (202) and is fixed with a positioning rod (203); the bottom of the second core tube (201) is provided with an insertion groove (205) corresponding to the insertion shell (202); the inner wall of the insertion groove (205) is evenly fixed with a second rubber ring (206); the first rubber ring (204) and the second rubber ring (206) are staggered in an upper and lower manner; the lower end surface of the second core tube (201) is located on the outer ring of the insertion groove (205) and is evenly provided with a positioning groove (207) corresponding to the positioning rod (203).

5. The core drill bit for iron ore according to claim 1, characterized in that: Six groups of contraction grooves are evenly arranged inside the drill bit body (1), and elastic support blocks (5) connected via springs are arranged inside the contraction grooves.

6. The core drill bit for iron ore according to claim 1, characterized in that: The opening and closing assembly comprises a fixed plate (605) fixed to the inner wall of the mounting block (6), a slide groove (606) is provided inside the fixed plate (605), a slider (607) is slidably connected to the inner wall of the slide groove (606), the clamping plate (608) is located at one end of the slider (607) and is fixedly connected, four groups of the clamping plates (608) are provided, and a push assembly for opening and closing is provided on the clamping plates (608).

7. The core drill bit for iron ore according to claim 6, characterized in that: The pushing assembly includes a clamping plate (608) having an upper end provided with a movable rod (604) rotatably connected via a rotating shaft, a mounting plate (601) provided inside the mounting block (6), an electric push rod (602) being fixed through the four ends of the mounting plate (601), a slide plate (603) being fixed to the telescopic end of the electric push rod (602), and an outer wall of the slide plate (603) being provided with a rotating shaft rotatably connected to the other end of the movable rod (604).

8. The core drill bit for iron ore according to claim 1, characterized in that: The reciprocating assembly comprises a rectangular groove (701) fixedly opened inside the supporting shell (7), a mounting seat (702) is fixed inside the rectangular groove (701), a reciprocating screw rod (703) is rotatably connected inside the mounting seat (702), an outer wall of the reciprocating screw rod (703) is threadedly connected to a movable block (704), and the movable block (704) is slidably connected to the inner wall of the mounting seat (702), vertical rods (705) are fixed at both ends of the movable block (704), a lifting plate (706) is fixed at the lower end of the vertical rod (705), the sliding rod (707) is located at the lower end surface of the lifting plate (706) and is fixedly connected, a positioning plate (708) is fixed at the lower end of the supporting shell (7), and the sliding rod (707) is slidably connected to the positioning plate (708).

9. The core drill bit for iron ore according to claim 1, characterized in that: The elastic component comprises a knocking shell (709) fixed to the lower end of the sliding rod (707), and an elastic knocking rod (8) is arranged inside the knocking shell (709).

10. A drilling device used for a core drill bit for iron ore according to any one of claims 1 to 9, characterized in that: The invention comprises a mounting bracket (9), wherein a top plate (901) is fixed to the top of the mounting bracket (9), a hydraulic rod (902) is fixed inside the top plate (901), a driving seat (903) is fixed to the telescopic end of the hydraulic rod (902), a sliding block (904) is fixed on the inner side of the driving seat (903), a positioning pulley (905) is provided on the inner side of the sliding block (904), and a vertical groove (906) is provided on the inner wall of the mounting bracket (9) for sliding with the positioning pulley (905).

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