A complete coal seam sampling drill

Abstract

The present invention belongs to the technical field of coal seam exploration, and discloses a complete coal seam sampling drilling rig, including a mounting frame and a pillar, a movable plate is slidably mounted on the outer surface of the pillar, a motor is mounted on the top of the movable plate, a drill rod is mounted on the output shaft of the motor, and a ball screw is also mounted on the bottom of the mounting frame. The device makes the entity part of the coal seam directly opposite to the sampling slot "enter the sampling slot" through the rotation of the crushing head, and drives the movable gear to rotate through the outer gear ring. The design of the eccentric inner peripheral surface of the movable gear drives the ring cutter to rotate and cut the outer surface of the coal seam to form an outer ring incision. After a circle of cutting of the movable gear, only the middle part of the entity part of the coal seam is retained, and the upward pulling force of the ball screw is used to pull the coal seam upward, so that the middle part that is not cut off is directly broken by the external force, and finally, a relatively complete coal seam sample is formed.

Description

Technical Field

[0001] The invention belongs to the technical field of coal exploration, and in particular relates to a drilling rig that can realize complete sampling of a whole set of coal seams. Background Art

[0002] Coal is a solid fossil energy gradually formed by sedimentary organic matter through complex biochemical and physicochemical changes, and has played an important role in the development of human society. In the process of coalfield geological exploration, a multifunctional drilling rig is often used to drill and sample the target coal seam. The drill bit of the drilling rig is fixed and disassembled by threading to realize drilling, sampling or other functions; when the drill bit drills to the target coal seam, a special sampling drill bit is replaced, and a rotary feed motion is used to push the crushed coal sample into the sampling drill bit, and the coal seam sampling function is realized through high-pressure airflow at the top of the drilling rig; the samples collected by this method are mainly crushed coal, and are often accompanied by sample loss, resulting in incomplete extraction of coal samples, thereby failing to realize the relatively large and complete coal sampling function. Therefore, it is urgent to improve the drilling rig. The present invention designs and provides a complete set of coal seam sampling drilling rigs. Summary of the invention

[0003] The object of the present invention is to provide a complete coal seam sampling drill to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a complete coal seam sampling drill, comprising a mounting frame and a pillar, a movable plate is slidably mounted on the outer surface of the pillar, a motor is mounted on the top of the movable plate, a drill rod is mounted on the output shaft of the motor, a ball screw is also mounted on the bottom of the mounting frame, the ball screw is used to drive the movable plate to move up and down, a sampling drill bit is threadedly mounted on the bottom end of the drill rod, a crushing head is fixedly mounted on the bottom of the sampling drill bit, a sampling groove is opened in the middle of the sampling drill bit, a cutting cavity is opened at the bottom of the sampling groove, and the A transmission chamber is provided on the upper side of the resection chamber, and a plurality of through grooves are provided on the inner wall of the transmission chamber. A connecting ring is rotatably installed inside the transmission chamber, and an outer gear ring located inside the resection chamber is fixedly installed on the bottom of the connecting ring. A passive gear is also fixedly installed on the outer surface of the connecting ring, and a movable gear is meshingly connected to the inner side of the outer gear ring. A ring cutter is fixedly installed on the inner circumference of the movable gear, and the inner diameter of the ring cutter is equal to that of the sampling groove. A spring and a limit plate are movably sleeved on the inner wall of the sampling groove. Four groups of transmission mechanisms are provided on the inner wall of the transmission chamber, and mesh with the passive gear.

[0005] As a preferred solution of the present invention, the transmission mechanism includes a fixed column fixedly installed on the inner wall of the transmission cavity, a rotating drum is rotatably installed on the outer surface of the fixed column, a plurality of rotating plates are fixedly installed in the middle of the outer surface of the rotating drum, and driving gears are fixedly installed on the upper and lower sides of the outer surface of the rotating drum, and the driving gear is meshed with the driven gear.

[0006] As a preferred solution of the present invention, both upper and lower sides of the inner wall of the through slot are provided with clearance grooves, the driving gear is placed in the clearance grooves, and the rotating plate passes through the through slot and protrudes from the outer peripheral surface of the sampling drill bit.

[0007] As a preferred solution of the present invention, the passive gears are provided in two groups and are distributed on the upper and lower sides of the rotating plate, and are respectively meshed with the upper and lower groups of active gears.

[0008] As a preferred solution of the present invention, the cross-sectional shape of the limit plate is "U"-shaped, the upper and lower ends of the spring are elastically connected to the top of the inner wall of the sampling groove and the limit plate respectively, the limit plate coincides with the side opening of the resection cavity and abuts against the ring knife.

[0009] As a preferred solution of the present invention, the movable gear is designed as an eccentric annular shape as a whole, and the movable gear moves around the axis of the outer gear ring when rotating.

[0010] As a preferred solution of the present invention, the ring cutter is made of cemented carbide, the cross-sectional shape of the ring cutter is triangular, and the ring cutter is fixed to the inner circumferential surface of the movable gear by welding.

[0011] As a preferred solution of the present invention, the transmission mechanism is arranged in four groups and is equidistantly distributed on the inner wall of the transmission cavity. The transmission mechanism transmits power to the connecting ring through the driving gear and the driven gear.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. This device is designed with a newly upgraded and optimized sampling drill bit, which cooperates with a crushing head. The coal blocks crushed by the crushing head are arranged around the sampling drill bit. At the same time, the rotating sampling drill bit cooperates with the transmission mechanism in the transmission chamber to drive the connecting ring to rotate. In the cutting chamber, the connecting ring drives the outer gear ring to make continuous rotational motion. When the sampling drill bit and the crushing head penetrate into the coal seam, the rotating cutting of the crushing head makes the solid part of the coal seam opposite to the sampling slot "enter the sampling slot", and the movable gear is driven to rotate by the outer gear ring. The design of the eccentric inner circumference of the movable gear drives the ring cutter to rotate and cut the outer surface of the coal seam to form an outer ring incision. After a circle of cutting of the movable gear, only the middle part of the solid part of the coal seam is retained. The upward pulling force of the ball screw is used to pull the coal seam upward, so that the part in the middle that has not been cut off is directly broken by external force, and finally, a relatively complete coal seam sample is formed.

[0014] 2. The transmission mechanism designed in this device is located on the upper side of the transmission chamber. A through groove is opened on the outer surface of the sampling drill bit so that the rotating plate can rotate through the through groove. When the sampling drill bit moves downward and is driven to rotate by the drill rod, the coal seam blocks that have been crushed by the crushing head and distributed on the outer peripheral surface of the sampling drill bit produce relative movement with the rotating plate, and generate thrust, which drives the rotating plate to rotate continuously. The power is reduced in speed and increased in torque through the meshing of the active gear and the passive gear, and is stably transmitted to the connecting ring and the outer gear ring, thereby realizing the powerless sampling of the device and effectively reducing the sampling cost.

[0015] 3. The four transmission mechanisms convert the thrust generated by the coal seam fragments into the rotational power of the transmission mechanism through the overall rotation of the sampling drill bit and the relative movement between the coal seam fragments arranged on the outer peripheral surface of the sampling drill bit. When the sampling drill bit drives the fixed column, the rotating drum and the rotating plate to rotate, the fragments located on the outer peripheral surface of the sampling drill bit will contact the rotating plate and generate force. This design not only helps to reduce the complexity of the sampling module design and reduce the design cost, but also can dynamically block large-volume coal seam fragments on the outer peripheral surface of the sampling drill bit through the continuously rotating rotating plate to prevent them from entering the interior of the transmission cavity. Due to the continuous rotation of the rotating plate, large-volume coal seam fragments cannot enter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front cutaway schematic diagram of the overall structure of the present invention;

[0017] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at center A;

[0018] Figure 3 It is a side schematic diagram of the overall structure of the present invention;

[0019] Figure 4 It is a schematic diagram of the interior of the transmission cavity of the present invention;

[0020] Figure 5 is a schematic diagram of the interior of the resection cavity of the present invention;

[0021] Figure 6 It is a schematic diagram of the interior of the sampling drill bit of the present invention;

[0022] Figure 7 It is a schematic diagram of the separation of the limit plate, spring, outer gear ring, movable gear, ring cutter, connecting ring, passive gear, fixed column, rotating drum, rotating plate and active gear of the present invention;

[0023] Figure 8 It is a schematic diagram of the separation of the passive gear, the fixed column, the rotating drum, the rotating plate and the active gear of the present invention;

[0024] Fig. 9It is a front perspective schematic diagram of the overall structure of the present invention.

[0025] In the figure: 1. mounting frame; 2. pillar; 3. moving plate; 4. motor; 5. drill rod; 6. ball screw; 7. sampling drill bit; 71. cutting chamber; 72. transmission chamber; 73. through slot; 74. clearance slot; 75. sampling slot; 8. crushing head; 9. limit plate; 10. spring; 11. outer gear ring; 12. movable gear; 13. ring cutter; 14. connecting ring; 15. passive gear; 16. fixed column; 17. rotating drum; 18. rotating plate; 19. driving gear. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 8 As shown, the embodiment of the present invention provides a complete coal seam sampling drill, including a mounting frame 1 and a pillar 2, a movable plate 3 is slidably mounted on the outer surface of the pillar 2, a motor 4 is mounted on the top of the movable plate 3, a drill rod 5 is mounted on the output shaft of the motor 4, a ball screw 6 is also mounted on the bottom of the mounting frame 1, the ball screw 6 is used to drive the movable plate 3 to move up and down, a sampling drill bit 7 is threadedly mounted on the bottom end of the drill rod 5, a crushing head 8 is fixedly mounted on the bottom of the sampling drill bit 7, a sampling groove 75 is opened in the middle of the sampling groove 75, a cutting cavity 71 is opened at the bottom of the sampling groove 75, and a transmission cavity is opened on the upper side of the cutting cavity 71 72, the inner wall of the transmission cavity 72 is provided with a plurality of through grooves 73, a connecting ring 14 is rotatably installed inside the transmission cavity 72, an outer gear ring 11 located inside the cutting cavity 71 is fixedly installed at the bottom of the connecting ring 14, a passive gear 15 is also fixedly installed on the outer surface of the connecting ring 14, a movable gear 12 is meshedly connected to the inner side of the outer gear ring 11, a ring cutter 13 is fixedly installed on the inner circumference of the movable gear 12, the inner diameter value of the ring cutter 13 is equal to the sampling groove 75, a spring 10 and a limit plate 9 are movably sleeved on the inner wall of the sampling groove 75, four sets of transmission mechanisms are arranged on the inner wall of the transmission cavity 72, and meshed with the passive gear 15;

[0028] The device is designed with a newly upgraded and optimized sampling drill bit 7, which cooperates with a crushing head 8. The coal blocks crushed by the crushing head 8 are arranged around the sampling drill bit 7. At the same time, the rotating sampling drill bit 7 cooperates with the transmission mechanism in the transmission chamber 72 to drive the connecting ring 14 to rotate. In the cutting chamber 71, the connecting ring 14 drives the outer gear ring 11 to perform continuous rotational motion. When the sampling drill bit 7 and the crushing head 8 penetrate into the coal seam, the rotating cutting of the crushing head 8 makes the solid part of the coal seam opposite to the sampling groove 75 "enter the sampling groove 75", and the movable gear 12 is driven to rotate by the outer gear ring 11. The design of the eccentric inner circumference of the movable gear 12 drives the ring cutter 13 to rotate and cut the outer surface of the coal seam to form an outer ring incision. After a circle of cutting by the movable gear 12, only the middle part of the solid part of the coal seam is retained. The upward pulling force of the ball screw 6 is used to pull the coal seam upward, so that the part in the middle that has not been cut off is directly broken by external force, and finally, a relatively complete coal seam sample is formed.

[0029] The transmission mechanism includes a fixed column 16 fixedly mounted on the inner wall of the transmission cavity 72, a rotating drum 17 is rotatably mounted on the outer surface of the fixed column 16, a plurality of rotating plates 18 are fixedly mounted on the middle of the outer surface of the rotating drum 17, and a driving gear 19 is fixedly mounted on both the upper and lower sides of the outer surface of the rotating drum 17, and the driving gear 19 is meshed with the driven gear 15;

[0030] The transmission mechanism of the device is located on the upper side of the transmission cavity 72. A through groove 73 is provided on the outer surface of the sampling drill bit 7 so that the rotating plate 18 can rotate through the through groove 73. When the sampling drill bit 7 moves downward and is driven to rotate by the drill rod 5, the coal seam blocks that have been crushed by the crushing head 8 and distributed on the outer peripheral surface of the sampling drill bit 7 are used to generate relative movement with the rotating plate 18, and thrust is generated to drive the rotating plate 18 to rotate continuously. The power is reduced in speed and increased in torque through the meshing of the driving gear 19 and the driven gear 15, and is stably transmitted to the connecting ring 14 and the outer gear ring 11, so that the sampling of the device is unpowered and the sampling cost is effectively reduced.

[0031] The upper and lower sides of the inner wall of the through slot 73 are provided with clearance grooves 74, the driving gear 19 is placed in the clearance groove 74, the rotating plate 18 passes through the through slot 73, and protrudes from the outer peripheral surface of the sampling drill bit 7;

[0032] like Figure 4 As shown, the driving gear 19 is stuck and collides with the inner wall of the transmission chamber 72, so the clearance groove 74 is provided to make way for the driving gear 19, so that the driving gear 19 can rotate freely, and the rotating plate 18 protruding from the outer peripheral surface of the sampling drill bit 7 can contact the broken coal blocks outside the sampling drill bit 7, thereby generating a rotational thrust.

[0033] The passive gears 15 are provided in two groups and are distributed on the upper and lower sides of the rotating plate 18, and are respectively meshed with the upper and lower groups of active gears 19;

[0034] The upper and lower groups of passive gears 15 can mesh with the upper and lower groups of active gears 19 respectively. This design is suitable for the rotating plate 18 located in the middle of the outer surface of the rotating drum 17. The meshing of the two groups can improve the stability of the transmission.

[0035] The cross-sectional shape of the limit plate 9 is "U"-shaped, and the upper and lower ends of the spring 10 are elastically connected to the top of the inner wall of the sampling slot 75 and the limit plate 9 respectively. The limit plate 9 coincides with the side opening of the resection cavity 71 and abuts against the ring knife 13;

[0036] The function of the limit plate 9 is to resist the ring knife 13 before the coal seam enters the sampling groove 75, preventing the rotating plate 18 from driving the movable gear 12 to rotate through the driving gear 19 and the driven gear 15, thereby hindering the inner wall of the sampling groove 75 and preventing the coal seam from entering the sampling groove 75.

[0037] The movable gear 12 is designed as an eccentric annular ring as a whole, and the movable gear 12 moves around the axis of the outer gear ring 11 when rotating;

[0038] The eccentric ring design of the movable gear 12 can perform outer ring cutting of the coal seam entering the sampling slot 75. The greater the deviation between the outer ring center of the movable gear 12 and the inner ring center, the greater the portion of the outer circumference of the coal seam that is cut off.

[0039] The ring cutter 13 is made of hard alloy, has a triangular cross-section, and is fixed to the inner circumference of the movable gear 12 by welding.

[0040] The ring cutter 13 is made of cemented carbide, and when driven to rotate by the movable gear 12, it will perform rotational cutting on the outer peripheral surface of the coal seam located on its inner peripheral surface, and the triangular tip of the inner peripheral surface of the ring cutter 13 is horizontally facing the coal seam.

[0041] The transmission mechanism is provided in four groups and is equidistantly distributed on the inner wall of the transmission cavity 72. The transmission mechanism transmits power to the connecting ring 14 through the driving gear 19 and the driven gear 15.

[0042] The four transmission mechanisms convert the thrust generated by the coal seam fragments into the rotational power of the transmission mechanism through the overall rotation of the sampling drill bit 7 and the relative movement between the coal seam fragments arranged on the outer peripheral surface of the sampling drill bit 7. When the sampling drill bit 7 drives the fixed column 16, the rotating drum 17 and the rotating plate 18 to rotate, the fragments located on the outer peripheral surface of the sampling drill bit 7 will contact the rotating plate 18 and generate force. This design not only helps to reduce the complexity of the sampling module design and reduce the design cost, but also can dynamically block large-volume coal seam fragments on the outer peripheral surface of the sampling drill bit 7 through the continuously rotating rotating plate 18 to prevent them from entering the interior of the transmission cavity 72. Due to the continuous rotation of the rotating plate 18, large-volume coal seam fragments cannot enter.

[0043] Working principle:

[0044] When the device is working, the conventional drill bit is replaced by the drill rod 5 to drill a hole. When the drilling depth reaches the target coal seam, the sampling drill bit 7 is replaced, the motor 4 is started, and the drill rod 5, the sampling drill bit 7 and the crushing head 8 are driven to rotate. At the same time, the ball screw 6 is started and the motor 4 is driven to move downward, so that the sampling drill bit 7 and the crushing head 8 move toward the target coal seam depth.

[0045] Then, the crushing head 8 first contacts the coal seam when rotating downward, and crushes the coal seam outside its inner ring by rotation. At this time, due to the hollow design of the crushing head 8, the relatively complete coal seam enters the interior of the crushing head 8 "upward" by relative movement (note: "upward" here means that the sampling drill bit 7 and the crushing head 8 move downward, while the coal seam does not move, thereby entering the interior of the sampling drill bit 7), and enters the sampling groove 75. At this time, the limit plate 9 begins to move upward under the upward pressure of the coal seam, and compresses the spring 10 until the limit plate 9 moves upward to the highest point. At this time, the relatively complete coal seam block sample is completely filled in the sampling groove 75, and the ball screw 6 is stopped, so that the sampling drill bit 7 and the crushing head 8 are at the current height as a whole. At this time, since the sampling drill bit 7 completely enters the coal seam area, and after the rotation and crushing of the crushing head 8, the outer surface of the sampling drill bit 7 is covered with broken coal seam blocks. After the high-speed rotation of the sampling drill bit 7, the coal blocks drive the rotating plate 18 to rotate and transmit the power to the driving gear 19;

[0046] Then, the four transmission mechanisms drive the connecting ring 14 and the outer gear ring 11 to rotate continuously through the driving gear 19 and the driven gear 15. Since the diameter of the driving gear 19 is much smaller than that of the driven gear 15, it plays the role of "reducing speed and increasing torque". In the cutting cavity 71, the continuously rotating outer gear ring 11 will drive the movable gear 12 and the ring cutter 13 to rotate. The movable gear 12 will drill and rotate around the axis of the outer gear ring 11, and its inner circumference will drive the ring cutter 13 to rotate and cut the coal seam entering the sampling slot 75, forming an outer ring incision. After one circle of cutting by the movable gear 12, only the middle part of the solid part of the coal seam is retained.

[0047] Finally, the sampling drill bit 7 and the crushing head 8 are driven upward by the ball screw 6 to pull the uncut middle part of the coal seam entering the sampling slot 75 upward to form a complete coal seam sampling. At this time, the movable gear 12 needs to have a deviation angle of about 90° relative to its original position, so that the physical part of the movable gear 12 is just in the sampled coal seam block.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0049] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A complete coal seam sampling drilling rig, comprising a mounting frame (1) and a support (2), wherein a movable plate (3) is slidably mounted on the outer surface of the support (2), a motor (4) is mounted on the top of the movable plate (3), a drill rod (5) is mounted on the output shaft of the motor (4), and a ball screw (6) is also mounted on the bottom of the mounting frame (1), wherein the ball screw (6) is used to drive the movable plate (3) to move up and down, and is characterized in that: The bottom end of the drill rod (5) is threadedly mounted with a sampling drill bit (7), the bottom of the sampling drill bit (7) is fixedly mounted with a crushing head (8), the middle of the sampling drill bit (7) is provided with a sampling groove (75), the bottom of the sampling groove (75) is provided with a cutting cavity (71), the upper side of the cutting cavity (71) is provided with a transmission cavity (72), the inner wall of the transmission cavity (72) is provided with a plurality of groups of through grooves (73), a connecting ring (14) is rotatably mounted inside the transmission cavity (72), and a connecting ring (14) is fixedly mounted at the bottom of the connecting ring (14) and a connecting ring (75) located in the cutting cavity is fixedly mounted. (71) an outer gear ring (11) inside, a passive gear (15) is fixedly mounted on the outer surface of the connecting ring (14), the inner side of the outer gear ring (11) is meshingly connected with a movable gear (12), the inner circumferential surface of the movable gear (12) is fixedly mounted with a ring knife (13), the inner diameter of the ring knife (13) is equal to the sampling groove (75), the inner wall of the sampling groove (75) is movably sleeved with a spring (10) and a limit plate (9), the inner wall of the transmission chamber (72) is provided with four sets of transmission mechanisms, which are meshing with the passive gear (15).

2. A complete coal seam sampling drilling rig according to claim 1, characterized in that: The transmission mechanism comprises a fixed column (16) fixedly mounted on the inner wall of the transmission chamber (72); a rotating drum (17) is rotatably mounted on the outer surface of the fixed column (16); a plurality of rotating plates (18) are fixedly mounted in the middle of the outer surface of the rotating drum (17); driving gears (19) are fixedly mounted on both upper and lower sides of the outer surface of the rotating drum (17); and the driving gear (19) is meshed with the driven gear (15).

3. A complete coal seam sampling drilling rig according to claim 2, characterized in that: The inner wall of the through slot (73) is provided with clearance grooves (74) on both upper and lower sides. The driving gear (19) is placed in the clearance groove (74). The rotating plate (18) passes through the through slot (73) and protrudes from the outer peripheral surface of the sampling drill bit (7).

4. A complete coal seam sampling drilling rig according to claim 3, characterized in that: The passive gears (15) are arranged in two groups and are distributed on the upper and lower sides of the rotating plate (18), and are respectively meshed with the upper and lower groups of the active gears (19).

5. A complete coal seam sampling drilling rig according to claim 4, characterized in that: The cross-sectional shape of the limiting plate (9) is "U"-shaped. The upper and lower ends of the spring (10) are elastically connected to the top of the inner wall of the sampling groove (75) and the limiting plate (9) respectively. The limiting plate (9) overlaps with the side opening of the resection cavity (71) and abuts against the ring knife (13).

6. A complete coal seam sampling drilling rig according to claim 5, characterized in that: The movable gear (12) is designed as an eccentric annular shape as a whole, and the movable gear (12) moves around the axis of the outer gear ring (11) when rotating.

7. A complete coal seam sampling drilling rig according to claim 6, characterized in that: The ring cutter (13) is made of hard alloy, has a triangular cross-sectional shape, and is fixed to the inner circumferential surface of the movable gear (12) by welding.

8. A complete coal seam sampling drilling rig according to claim 7, characterized in that: The transmission mechanisms are arranged in four groups and are equidistantly distributed on the inner wall of the transmission cavity (72) at a circumferential distance. The transmission mechanisms transmit power to the connecting ring (14) via the driving gear (19) and the driven gear (15).

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