Drilling rig for coal mining

Abstract

The utility model relates to the technical field of coal mining operation, in particular to a drilling rig for coal mining, which comprises a supporting ring, at least three first fixing seats arranged around the supporting ring, at least three second fixing seats arranged around the fixing ring, and limiting rods arranged between the second fixing seats and the first fixing seats. The pushing seat is arranged between the supporting ring and the first fixing seat, one end of the pushing seat is fixedly connected with a drilling barrel, and a spiral pushing piece used for drilling soil is arranged in the drilling barrel; the sampling barrel is arranged at one end of the drilling barrel, and a spiral feeding piece used for sending out mud blocks is arranged in the sampling barrel. During drilling, the spiral pushing piece can lift mud blocks in a drilled hole upwards, it is guaranteed that the drilled hole is smooth, the upwards-pushed mud blocks can enter the sampling barrel, the sampling barrel can send out the mud blocks in a centralized mode through the spiral feeding piece, workers can conveniently collect and sample the drilled mud blocks, and then deep drilling is conducted through a hydraulic drilling machine.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine operation, in particular to a drilling device used for coal mining. Background Art

[0002] Coal mines are areas rich in coal resources and are generally categorized as underground and open-pit mines. When coal seams are far from the surface, tunnels are typically excavated underground, representing underground mining. Currently, hydraulic drilling rigs are used to extract gas from coal seams. Before drilling, a hole is drilled into the wellbore surface. Exploration drilling results are analyzed to determine rock fractures and the slurry diffusion radius, ensuring smooth mining operations.

[0003] Hydraulic drilling rigs use a hydraulic system to convert liquid pressure into mechanical power to achieve drilling operations. They are mainly divided into several types, including rotary drills, percussion drills, and combination drills. Rotary drills are one of the main types of hydraulic drills. They use a hydraulic motor to drive the drill rod and drill bit to rotate and cut the rock.

[0004] For example, Chinese patent application number CN220705612U discloses a foldable drilling rig, comprising a drilling rig body, a hydraulic device disposed on the surface of the drilling rig body, an operating lever disposed on the surface of the drilling rig body, and a first folding device disposed at one end of the drilling rig body. When using the protective device, a protective cylinder is directly placed on the surface of the drill head. Because the protective cylinder is in close contact with the drill head, it can be directly inserted into the mine wall. This secures the soil clods on the mine wall, preventing them from sliding into the newly drilled hole when the drill head is pulled out of the mine wall. After drilling the shallow mine wall, a hydraulic drill is used to conduct deeper drilling. During the drilling process, operators need to analyze the exploration drilling results and determine the rock fractures and slurry diffusion radius. Therefore, after breaking the shallow well wall, samples of the mud clods in the drill hole in the mine wall are collected. Sampling and analysis must be performed after the drill head is pulled out of the ground, which is relatively inefficient overall. Utility Model Content

[0005] In response to the above problems, the present invention proposes a drilling device for coal mining, which is used to solve the shortcomings of existing drilling devices that, after breaking the shallow well wall, they will sample the mud blocks in the drill hole of the mine wall. The sampling and analysis need to be carried out after the drill head is pulled out of the ground, which is relatively inefficient.

[0006] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a drilling device for coal mining, comprising a support ring, at least three first fixing seats are provided around the support ring, and further comprising:

[0007] A fixing ring, with at least three second fixing seats provided around the fixing ring, a limiting rod provided between the second fixing seat and the first fixing seat, and both the second fixing seat and the first fixing seat being fixedly connected to the limiting rod;

[0008] A pushing seat is placed between the support ring and the first fixed seat. The pushing seat is slidably connected to the limit rod. One end of the pushing seat is fixedly connected to a drilling tube. The drilling tube is provided with a spiral pushing member for drilling and taking soil.

[0009] The sampling barrel is arranged at one end of the drilling barrel and is communicated with the drilling barrel. A spiral feeding piece for sending mud blocks out is arranged in the sampling barrel.

[0010] Further improvements are: a tooth plate is provided between the fixed ring and the support ring, the two ends of the tooth plate are fixedly connected to the fixed ring and the support ring respectively, a second motor is provided on the pushing seat, the mounting end of the second motor is fixedly connected to the pushing seat, and the output end of the second motor is fixedly connected to a gear, which engages with the tooth plate.

[0011] Further improvements are: the spiral pushing member includes a transmission shaft and a first spiral blade, the first spiral blade is rotatably arranged in the drilling barrel, the transmission shaft is fixedly connected to one end of the first spiral blade, a first motor is provided on the pushing seat, the first motor mounting end is fixedly connected to the pushing seat, the transmission shaft passes through the pushing seat and is fixedly connected to the output end of the first motor.

[0012] Further improvements are: a storage tank is fixedly connected to the connection between the drilling barrel and the pushing seat, the storage tank is sleeved on the outside of the drilling barrel, the storage tank is connected to the drilling barrel, one end of the sampling barrel is fixedly connected to the bottom of the storage tank, and the other end of the sampling barrel is provided with a discharge port.

[0013] A further improvement is that the spiral feeding member includes a second spiral stirring part, which is rotatably arranged in the sampling cylinder, and the sampling cylinder is fixedly connected to a third motor at one end away from the storage tank, and the output end of the third motor is fixedly connected to the second spiral stirring part.

[0014] A further improvement is that the second fixing seat is fixedly connected to the fixing ring, the first fixing seat is fixedly connected to the supporting ring, and a supporting member for supporting the supporting ring is provided on the first fixing seat.

[0015] A further improvement is that at least two crushing heads are provided at the other end of the first spiral blade, the crushing heads are evenly arranged in the circumferential direction of the axis of the first spiral blade, the crushing heads are fixedly connected to the first spiral blade, and a plurality of point-shaped protrusions are provided on the surface of the crushing heads.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] During drilling, the spiral pusher will lift the mud blocks in the borehole upward to ensure that the borehole is unobstructed. The mud blocks pushed upward will enter the sampling tube, and the sampling tube will send the mud blocks out through the spiral feeder, making it convenient for the staff to collect and sample the drilled mud blocks, and then use the hydraulic drill rig to carry out deeper drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 It is a structural diagram of the pushing seat in the utility model.

[0020] Figure 2 It is a structural diagram of the drilling tube in the utility model.

[0021] Figure 3 This utility model Figure 2 A magnified view of the structure at point A in the middle.

[0022] Figure 4 This is the structural diagram of the sampling tube in the utility model

[0023] Among them: 1. Support ring; 2. Support member; 3. First fixed seat; 4. Fixed ring; 5. Second fixed seat; 6. Limit rod; 7. Push seat; 8. Storage tank; 9. Drilling tube; 10. Sampling tube; 11. First motor; 12. Second motor; 13. Gear; 14. Tooth plate; 15. First spiral blade; 16. Crushing head; 17. Drive shaft; 18. Discharge port; 19. Third motor; 20. Second spiral stirring part. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] according to Figure 1 、 2 As shown in Figures 3 and 4, this embodiment provides a drilling device for coal mining, including a support ring 1, at least three first fixing seats 3 are provided around the support ring 1, and further comprising:

[0026] A fixing ring 4, with at least three second fixing seats 5 provided around the fixing ring 4, a limiting rod 6 provided between the second fixing seat 5 and the first fixing seat 3, and both the second fixing seat 5 and the first fixing seat 3 are fixedly connected to the limiting rod 6;

[0027] The pushing seat 7 is placed between the support ring 1 and the first fixed seat 3. The pushing seat 7 is slidably connected to the limit rod 6. One end of the pushing seat 7 is fixedly connected to the drilling tube 9. The drilling tube 9 is provided with a spiral pushing member for drilling and taking soil;

[0028] Move the support ring 1 to the area that needs to be drilled, slide the pushing seat 7 along the rod body of the limit rod 6, and push the drilling tube 9 on the pushing seat 7 into the borehole for drilling. During the drilling process, the spiral pushing part will lift the mud blocks in the borehole upward to ensure that the borehole is unobstructed.

[0029] The sampling tube 10 is placed at one end of the drilling tube 9 and is connected to the drilling tube 9. The sampling tube 10 is equipped with a spiral feeder for sending mud blocks outward. The mud blocks pushed upward will enter the sampling tube 10, and the sampling tube 10 will use the spiral feeder to send the mud blocks out in a centralized manner, making it easier for workers to collect and sample the drilled mud blocks.

[0030] The pushing seat 7 can slide along the rod body of the limiting rod 6. A power component for pushing the pushing seat 7 to fall is provided between the fixed ring 4 and the support member 2. Specifically, a tooth plate 14 is provided between the fixed ring 4 and the support ring 1. The two ends of the tooth plate 14 are fixedly connected to the fixed ring 4 and the support ring 1 respectively. A second motor 12 is provided on the pushing seat 7. The mounting end of the second motor 12 is fixedly connected to the pushing seat 7. The output end of the second motor 12 is fixedly connected to a gear 13, and the gear 13 is meshed with the tooth plate 14.

[0031] The second motor 12 drives the gear 13 to rotate, and the gear 13 engages with the toothed plate 14 during rotation, pushing the push seat 7 to move linearly along the length of the toothed plate 14. As the push seat 7 moves, it also slides along the rod of the limit rod 6. The limit rod 6 guides the push seat 7 by cooperating with the push seat 7. In addition to the toothed plate gear transmission, hydraulic transmission can also be used, which will not be explained in detail here.

[0032] About the spiral pusher:

[0033] The spiral pusher includes a transmission shaft 17 and a first spiral blade 15. The first spiral blade 15 is rotatably arranged in the drilling tube 9. The transmission shaft 17 is fixedly connected to one end of the first spiral blade 15. A first motor 11 is provided on the pushing seat 7. The mounting end of the first motor 11 is fixedly connected to the pushing seat 7. The transmission shaft 17 passes through the pushing seat 7 and is fixedly connected to the output end of the first motor 11. The transmission shaft 17 is rotatably connected to the pushing seat 7. The first motor 11 drives the first spiral blade 15 to rotate via the transmission shaft 17. When the drilling tube 9 penetrates deep into the ground, the first spiral blade 15 will lift the mud in the drilling tube 9 upward through rotation to ensure smooth drilling.

[0034] It is worth further explaining that a storage tank 8 is fixedly connected to the connection between the drilling tube 9 and the pushing seat 7. The storage tank 8 is sleeved on the outside of the drilling tube 9 and is in communication with the drilling tube 9. One end of the sampling tube 10 is fixedly connected to the bottom of the storage tank 8, and the other end of the sampling tube 10 is provided with a discharge port 18. The spiral pusher lifts the mud to the top of the drilling tube 9, and the mud falls from the top of the drilling tube 9 into the storage tank 8, then enters the sampling tube 10 through the storage tank 8, and is discharged from the discharge port 18 of the sampling tube 10.

[0035] About spiral feeding parts:

[0036] The spiral feeder includes a second spiral stirring portion 20, which is rotatably disposed within the sampling barrel 10. A third motor 19 is fixedly connected to the end of the sampling barrel 10 away from the storage tank 8. The output end of the third motor 19 is fixedly connected to the second spiral stirring portion 20. The third motor 19 drives the second spiral stirring portion 20 to rotate. During rotation, the second spiral stirring portion 20 pushes mud blocks that have fallen to the bottom of the storage tank 8 into the sampling barrel 10 and then discharges them from the discharge port 18 at the other end of the sampling barrel 10. The mud blocks are automatically discharged in one place, making it easier for staff to collect and sample the mud blocks obtained during drilling.

[0037] It's worth noting that the second fixing seat 5 is fixedly connected to the fixing ring 4, and the first fixing seat 3 is fixedly connected to the support ring 1. The first fixing seat 3 is provided with a support member 2 for supporting the support ring 1. The support member 2 comprises a bolt rod and a spacer. The spacer is fixed to the lower end of the bolt rod. The bolt rod passes through the bottom of the first fixing seat 3 and is secured to the first fixing seat 3 via a threaded connection. During drilling, the support member 2 supports the support ring 1.

[0038] In a preferred embodiment, at least two crushing heads 16 are provided at the other end of the first spiral blade 15. These crushing heads 16 are evenly spaced circumferentially about the axis of the first spiral blade 15, are fixedly connected to the first spiral blade 15, and have a plurality of dot-shaped protrusions on their surfaces. The provision of multiple crushing heads 16 at the lower end of the first spiral blade 15 further enhances the drilling capability and operating strength of the first spiral blade 15.

[0039] After completing shallow drilling, a hydraulic drilling rig is used for deep drilling. The following is a detailed description of the structure of a conventional hydraulic drilling rig:

[0040] The hydraulic drilling rig adopts a group layout. The whole machine is divided into three major parts: the main machine, the pump station, and the operating table. The various parts are connected by H-type hydraulic hoses with strong sealing performance and high pressure resistance.

[0041] The main machine consists of a rotary chuck reduction gearbox device, a feeding device, a machine base device, a rotator device and a clamping device.

[0042] The rotary chuck reduction gearbox consists of a helical-axis variable-displacement piston motor, a gear reducer, and a rubber-type hydraulic chuck. The motor, through a two-stage gear reduction, drives the spindle and hydraulic chuck to achieve rotation of the drill tool. Adjusting the motor displacement adjusts the speed.

[0043] The main shaft of the rotator is a through-hole structure with a through-hole diameter of φ75mm. By replacing the slip groups with different diameters, drill rods of φ50, φ63, and φ73 can be used. The length of the drill rod is not limited by the structural size of the drilling rig. The rotary chuck reduction box device is installed on the drag plate of the feed machine body, and the feed oil cylinder reciprocates along the guide rail of the machine body to realize the feeding and pulling of the drill tool.

[0044] The hydraulic chuck adopts a hydraulic tightening, spring-released normally open structure, with the characteristics of free centering, safety, reliability, and strong clamping force. It can not only ensure normal drilling, but also be used to lift and lower drill tools, and powerfully pull out (the chuck is equipped with drill rods of different specifications. When replacing the chuck, use a special tool to compress the spring of the slip group and put it into the rubber cylinder).

[0045] The feed mechanism uses hydraulic cylinders to push and pull the carriage and rotary chuck reducer assembly forward and backward along the feed mechanism's guide rails. The guide rails utilize a dual-track structure, with the primary slideway utilizing a cylindrical guide and the secondary guideway utilizing a flat contact surface. This dual-track structure minimizes guideway swing. The rotary chuck reducer assembly is directly secured to the feed mechanism with screws. The feed mechanism's angle is directly adjusted by a rotator.

[0046] The base assembly consists primarily of a base, sliding bearing seat, lifting cylinder, and supporting cylinder. The feed mechanism automatically rises and falls along the supporting hydraulic cylinder, and the inclination angle can be adjusted by a rotator (ranging from +360° to -360°) to accommodate large-angle drilling. The column is supported by dual hydraulic cylinders.

[0047] The rotator device is mainly composed of a hydraulic motor, a worm gear reducer, a slewing bearing, etc., which is used to realize 360° rotation of the drilling rig feed device and the rotator to achieve the purpose of large-angle drilling.

[0048] How this application works:

[0049] The support ring 1 is positioned in the area to be drilled. The pusher seat 7 slides down along the limiting rod 6. The drill barrel 9 on the pusher seat 7 is pushed into the borehole for drilling. During the drilling process, the spiral pusher lifts the mud in the borehole upward, ensuring that the borehole is unobstructed. The mud pushed upward enters the sampling barrel 10, which then uses the spiral feeder to collect and sample the mud. After completing the shallow drilling, the hydraulic drill rig is used to drill deeper.

[0050] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0051] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those 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 application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A drilling device for coal mining, comprising a support ring (1), wherein at least three first fixing seats (3) are provided around the support ring (1), characterized in that: Also includes: A fixing ring (4), wherein at least three second fixing seats (5) are provided around the fixing ring (4), a limiting rod (6) is provided between the second fixing seat (5) and the first fixing seat (3), and the second fixing seat (5) and the first fixing seat (3) are both fixedly connected to the limiting rod (6); A pushing seat (7) is placed between the support ring (1) and the first fixed seat (3), the pushing seat (7) is slidably connected to the limiting rod (6), one end of the pushing seat (7) is fixedly connected to a drilling tube (9), and a spiral pushing member for drilling and taking soil is provided in the drilling tube (9); A sampling cylinder (10) is placed at one end of the drilling cylinder (9), the sampling cylinder (10) is communicated with the drilling cylinder (9), and a spiral feeding piece for sending mud blocks outward is provided in the sampling cylinder (10).

2. The drilling device for coal mining according to claim 1, characterized in that: A tooth plate (14) is provided between the fixing ring (4) and the supporting ring (1), and the two ends of the tooth plate (14) are fixedly connected to the fixing ring (4) and the supporting ring (1) respectively. A second motor (12) is provided on the pushing seat (7), and the mounting end of the second motor (12) is fixedly connected to the pushing seat (7). A gear (13) is fixedly connected to the output end of the second motor (12), and the gear (13) is meshed with the tooth plate (14).

3. The drilling device for coal mining according to claim 1, characterized in that: The spiral pusher comprises a transmission shaft (17) and a first spiral blade (15), wherein the first spiral blade (15) is rotatably arranged in the drilling tube (9), and the transmission shaft (17) is fixedly connected to one end of the first spiral blade (15). A first motor (11) is provided on the pushing seat (7), and the mounting end of the first motor (11) is fixedly connected to the pushing seat (7). The transmission shaft (17) passes through the pushing seat (7) and is fixedly connected to the output end of the first motor (11).

4. The drilling device for coal mining according to claim 1, characterized in that: A storage tank (8) is fixedly connected to the connection between the drilling tube (9) and the pushing seat (7), and the storage tank (8) is sleeved on the outside of the drilling tube (9). The storage tank (8) is communicated with the drilling tube (9), and one end of the sampling tube (10) is fixedly connected to the bottom of the storage tank (8), and the other end of the sampling tube (10) is provided with a discharge port (18).

5. The drilling device for coal mining according to claim 4, characterized in that: The spiral feeding member includes a second spiral stirring portion (20), which is rotatably arranged in the sampling cylinder (10), and the sampling cylinder (10) is fixedly connected to a third motor (19) at one end away from the storage tank (8), and the output end of the third motor (19) is fixedly connected to the second spiral stirring portion (20).

6. The drilling device for coal mining according to claim 1, characterized in that: The second fixing seat (5) is fixedly connected to the fixing ring (4), the first fixing seat (3) is fixedly connected to the supporting ring (1), and the first fixing seat (3) is provided with a support member (2) for supporting the supporting ring (1).

7. The drilling device for coal mining according to claim 3, characterized in that: The other end of the first spiral blade (15) is provided with at least two crushing heads (16), the crushing heads (16) are evenly arranged in the circumferential direction of the axis of the first spiral blade (15), the crushing heads (16) are fixedly connected to the first spiral blade (15), and the surface of the crushing heads (16) is provided with a plurality of dot-shaped protrusions.

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