Deep coal seam crushing slot anti-reflection device

Abstract

This is a deep coal seam fracturing slot anti-reflection device. [Solution] The deep coal seam crushing slot anti-reflection device includes a crushing agent supply device (1), a guide pipe (2) that is provided in a borehole opened in a deep coal seam and connected to the input terminal of the crushing agent supply device (1), and a crushing slot device (3) that is provided by fitting into the end of an adjacent guide pipe (2) and is used to engage the adjacent guide pipe (2).

Description

[Technical Field]

[0001] The present invention relates to the field of coal mining technology, particularly to a deep coal seam slotting and fracturing permeability-enhancing decive. [Background technology]

[0002] In the process of coal mining, in order to improve mining efficiency, slotting is generally performed on coal seams to increase the permeability of the coal seam, thereby increasing the efficiency and amount of gas extraction. Currently, in the slotting process of deep coal seam areas, because the deep coal seam areas are located at a relatively deep depth, the installation efficiency of common coal seam slotting equipment is low, and it is not convenient to perform crushing slotting at each coal seam area.

[0003] Therefore, there is a need to provide an improved technical solution to address the shortcomings of the prior art. Summary of the Invention [Problem to be solved by the invention]

[0004] To achieve the above object, the present invention provides the following technical solutions. [Means for solving the problem]

[0005] a fracturing agent supply device; A flow pipe provided in a borehole opened in a deep coal seam and connected to an input terminal of a fracturing agent supply device; a crushing slot device fitted to the end of an adjacent flow pipe, the crushing slot device being used to engage the adjacent flow pipe; A deep coal seam crushing slot anti-reflection device comprising: The crushing slot device an energy amplified assembly disposed at one end of the flow tube; a storage position limiting assembly provided at the other end of the flow tube; a slot assembly, both ends of which are rotatably attached to the energy amplifying assembly and the storage position limiting assembly via a first rotating ring; Including, The slot assembly includes: a second mounting cylinder, the second mounting cylinder having a ring wall at one end close to the energy amplifying assembly and having circumferentially distributed storage compartments, an occluder at the outer diameter opening of the storage compartment, a rotary disk attached to the occluder, a communication pipe at the rotary disk connecting the outside of the outer diameter opening of the storage compartment with the inner diameter opening of the storage compartment, a crushing slot pipe connected to the outer pipe opening, a jet reflection prevention hole in the wall of the crushing slot pipe, and a telescopic top rod frame fixed to the inner pipe opening of the communication pipe; a slider rail provided axially on a side wall of the inner diameter opening of the storage compartment; A latch skateboard that slides on a slider rail, wherein the card teeth on the upper plate surface of the latch skateboard are engaged with and fitted into the telescopic top rod frame, and the lower plate surface of the latch skateboard is provided with a telescopic trapezoid plug that is fixed vertically to the latch skateboard; Including, The jet reflection prevention hole is provided in an area on the side facing the cylindrical wall of the second mounting cylinder. Deep coal seam fracture slot anti-reflection device. Beneficial effects

[0006] In the present invention, in the process of laying the guide pipe, a crushing slot device is laid and installed to flexibly position the depth of each area of ​​the coal seam. However, through the energy increasing assembly, the slot assembly and the accommodation position limiting assembly, there is a wide range of options for the shape angle of the coal seam slot, which can flexibly provide a more specific and appropriate selection of the coal seam slot face position according to the texture configuration of the coal seam, and further improve the stability, fluency and slot efficiency of the slot process. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic diagram of the configuration of a deep coal seam crushing slot anti-reflection device of the present invention. [Figure 2] 1 is a schematic diagram of the configuration of a crushing slot device of the present invention. [Figure 3] FIG. 2 is an enlarged schematic view of a partial configuration of the slot assembly of the present invention. [Figure 4] FIG. 2 is an enlarged schematic view of a partial configuration of the crushing slot pipe of the present invention. [Figure 5] FIG. 2 is an enlarged schematic view of a portion of the energy augmentation assembly of the present invention. [Figure 6] 3 is an enlarged schematic diagram of a partial configuration of a flow control frame of the present invention. FIG. [Figure 7] 10 is a schematic diagram illustrating a modified embodiment of the flow control frame of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0008] Referring to Figures 1 to 7, the present invention provides the following technical solutions.

[0009] A demolition agent supply device 1; A flow pipe 2 is provided in a borehole opened in a deep coal seam and communicated with the input terminal of the fracturing agent supply device 1; a crushing slot device (3) fitted to the end of an adjacent flow conduit (2), the crushing slot device (3) being used to engage the adjacent flow conduit (2); Deep coal seam fracturing slot anti-reflection device including:

[0010] The crushing slot device 3 is an energy multiplication assembly 6 provided at one end of the flow tube 2; a storage position limiting assembly 4 provided at the other end of the flow pipe 2; The slot assembly 5 includes a slot assembly 5 rotatably mounted on both ends of the slot assembly 5 to the energy amplifying assembly 6 and the storage position limiting assembly 4 via a first rotating ring 7, respectively.

[0011] In concrete implementation, the energy increasing assembly 6 and the accommodation position limiting assembly 4 are pre-fixed and mounted at the pipe openings at both ends of the flow tube 2, respectively. When the flow tube 2 is docked and mounted, the slot assembly 5 is additionally mounted, and the slot assembly 5 is mounted and engaged with the energy increasing assembly 6 and the accommodation position limiting assembly 4 at the corresponding end through the first rotating ring 7.

[0012] The slot assembly 5 is a second mounting cylinder 51, and the second mounting cylinder 51 has a ring wall at one end thereof close to the energy multiplication assembly 6, on which are provided circumferentially distributed storage compartments 52. An occluder 58 is provided at the outer diameter opening of the storage compartment 52. Referring to FIG. 3, the occluder 58 seals and blocks the outer diameter opening of the storage compartment 52 in the lateral direction. A rotating disk 53 is attached to the occluder 58. The rotating disk 53 is provided with a communication pipe 54 connecting the outside of the outer diameter opening of the storage compartment 52 with the inner diameter opening of the storage compartment 52. A crushing slot pipe 55 is connected to the outer pipe opening of the communication pipe 54. A jet reflection prevention hole 511 is provided in the pipe wall of the crushing slot pipe 55. The second mounting cylinder 51 has a telescopic top rod frame 56 fixed to the inner pipe opening of the communicating pipe 54, a slider rail 57 axially provided on the side wall of the inner diameter opening of the storage compartment 52, and a latch skateboard 59 that slides on the slider rail 57, the card teeth on the upper plate surface of the latch skateboard 59 engaging with and fitting into the telescopic top rod frame 56, and the lower plate surface of the latch skateboard 59 has a telescopic trapezoidal plug 510 fixed vertically to the latch skateboard 59, and the trapezoidal end of the telescopic trapezoidal plug 510 has a recessed hole, and a jet reflection prevention hole 511 is provided in the area on the side facing the cylindrical wall of the second mounting cylinder 51.

[0013] In specific implementation, referring to FIG. 3, when the telescopic trapezoidal plug 510 receives a force and has a tendency to move rightward, the latch skateboard 59 fixes the trapezoidal end of the telescopic top rod frame 56 and has a tendency to move rightward, and the telescopic top rod frame 56 has a tendency to automatically contract, causing the rotating disc 53 to rotate counterclockwise. Meanwhile, as the crushing slot pipe 55 continuously slots into the coal seam, the telescopic trapezoidal plug 510 synchronously moves rightward, and is further transmitted to the crushing slot pipe 55, which synchronously rotates and opens along the axial plane, thereby slotting into the coal seam along the direction of the guide pipe 2.

[0014] The expandable trapezoidal plug 510 is configured in a variety of specifications. That is, when subjected to the same pressure, the expandable trapezoidal plugs 510 of a variety of specifications will contract by different amounts. Therefore, before the inverted trapezoidal snap ring 665 and the expandable trapezoidal plug 510 are mated and locked, the inverted trapezoidal snap ring 665 can move in the axial direction by different amounts. This allows the crushing slot pipe 55 to rotate along the axial plane and control the opening angle. Therefore, when slotting and selecting the coal seam, there are various options for the slot plane and the axial slot plane of the crushing slot pipe 55. This allows for flexible selection of a more specific and appropriate coal seam slot plane position based on the texture configuration of the coal seam.

[0015] The accommodation position limiting assembly 4 includes a first mounting tube 41, an accommodation tank 42 provided on the outer tube wall at one end of the first mounting tube 41 near the slot assembly 5, a first docking ring 44 provided on the inner tube wall at one end of the first mounting tube 41 near the slot assembly 5, and a position limiting strip 43 fixed to the inner tube wall of the first mounting tube 41 on the inside of the first docking ring 44.

[0016] The energy increasing assembly 6 comprises a third mounting tube 61, the inner wall of which is provided with a second docking ring 67 at one end thereof near the slot assembly 5, and a telescopic carriage 62, the telescopic carriage 62 having one end connected to the inner wall of the third mounting tube 61 located inside the second docking ring 67, and the other end of the telescopic carriage 62 having a coaxial mounting shaft 63 fixed thereto. A first conical flow tube 64 and a second conical flow tube 65, each having an opening opposite thereto, are fixed to both ends of the mounting shaft 63, and the tapered walls of the first conical flow tube 64 and the second conical flow tube 65 have a first conical flow port and a second conical flow port, respectively, so that the entire installed conical flow pipe 2 is completely filled with the fracturing agent. When there is no fracturing agent in the conduit 2, the resistance of the fracturing agent flowing through the conduit 2 is reduced; that is, the kinetic energy of the fracturing agent supply device 1 when the conduit 2 first supplies the fracturing agent must make the telescopic carriage 62 move completely to the right to meet the impact energy deficiency experienced by the telescopic carriage 62, thereby reducing the impact effect of the fracturing agent on the crushing slot device 3 at this time; on the other hand, after the fracturing agent is completely filled in the entire conduit 2, the kinetic energy of the fracturing agent supply is increased again, allowing all the crushing slot devices 3 to operate relatively synchronously and improving the grip on the coal seam slot. The telescopic carriage 62 includes an energy-increasing flow-blocking frame 66, which is installed in accordance with the mounting shaft 63, the first conduit 64 and the second conduit 65.

[0017] The energy-increasing flow-blocking frame 66 comprises second rotating rings 661 rotatably mounted on both ends of the mounting shaft 63, and a guide bar 662 fixed between the opposing annular surfaces of the two groups of second rotating rings 661; and a flow-blocking disk 664 fitted onto the mounting shaft 63 and the guide bar 662 and slidably connected thereto; an engaging spring 663 is connected to both ends of the axial center of the flow-blocking disk 664, and an outer annular surface of the flow-blocking disk 664 is fitted onto the end of the expandable trapezoidal plug 510. The other ends of the engaging springs 663 on both sides are connected to the annular surfaces of the second rotating rings 661 on both sides, and long cylindrical rings are further fixed to both ends of the middle part of the flow blocking disk 664, a flow control frame 68 attached to the inner cylindrical wall of the first flow cone-shaped cylinder 64, and a small diameter ring 666 attached to the outer cylindrical wall of the second flow cone-shaped cylinder 65, a groove opened inside the small diameter ring 666 and an extendable docking head 667 provided in the groove.

[0018] In concrete implementation, after the first guide cone 64 is fitted with the second docking ring 67, the telescopic docking head 667 and the first docking ring 44, the fracturing agent is restricted from accelerating through the first guide port, and after increasing its energy through the flow control frame 68, it impacts the engaging spring 664, resetting the action of the engaging spring 663. At this time, the fracturing agent in the local chamber where the connecting pipe 54 is located fills the connecting pipe 54, enters the fracturing slot pipe 55, and is ejected through the jet anti-reflection hole 511 to slot into the coal seam. The inverted trapezoidal snap ring 665 further has a protrusion that can engage with the recess, so that the inverted trapezoidal snap ring 665 can be fitted and locked into the telescopic trapezoidal plug 510. In addition, the installation configuration of the telescopic docking head 667 and the small diameter ring 666 reduces the diameter of the second guide cone cylinder 65, which facilitates the storage of fracturing agent energy in the chamber where the engaging spring 664 is located. The initial position of the telescopic docking head 667 is inside the third mounting cylinder 61, so that when it moves to the right, it can pass through the telescopic trapezoidal plug 510 more smoothly.

[0019] A flow blocking fan blade 668 is fixed to the outer wall of the long cylindrical ring of the flow blocking disk 664 near the second flow conical cylinder 65, which can convert the kinetic energy of the fracturing agent into energy that drives the rotation of the slot assembly 5, and is also beneficial to the smooth flow of the fracturing agent, preventing some of the material in the fracturing agent from accumulating and storing in the area of ​​the slot assembly 5.

[0020] The flow control frame 68 includes a mounting ring 681, on the inner ring wall of which are rotatably mounted swingable joints 682 along the axial direction, with several groups of joints 682 uniformly distributed around the circumference, and a short rotating shaft 683 rotatably mounted at the lower end of the joints 682, the lower end of which is fixedly connected to the outer arc end of a sector-shaped flitch 684. Reinforcing bars 685 are fixed to both sides of the sector-shaped flitch 684, and the two groups of reinforcing bars 685 are respectively mounted back to back and offset from the center line of the sector-shaped flitch 684. Elastic traction members 686 are further provided on both sides of the joints 682 and connected to the inner wall of the mounting ring 681, with the other ends of the elastic traction members 686 on both sides connected to the reinforcing bars 685 on both sides. A wire 8 is further connected to the end of the mounting shaft 63 near one end of the telescopic carriage 62, which passes through and leads into the flow pipe 2.

[0021] In concrete implementation, as the flow strength of the fracturing agent increases, as shown in FIG. 7, the flow control frame 68 in this configuration can change the diameter of the fracturing agent flow, especially in the area where it is located, under the action of the fracturing agent. That is, when the flow control frame 68 is in the left section of the change, the fracturing agent in the area where the fracturing slot pipe 55 is located can further increase in energy with the increase in the energy of the fracturing agent. At this time, the fracturing slot pipe 55 has not yet rotated, which facilitates the fracturing slot pipe 55 to control the increase in energy required for the coalbed slot. When the flow control frame 68 is in the right section of the change, the flow control frame 68 reduces the energy increase for the fracturing agent, which facilitates ensuring the safety of the fracturing slot device 3.

[0022] In concrete implementation, the deep coal seam area where slot fracture reflection prevention is required is selected, and then a hole is drilled in the position where slot fracture reflection prevention is required in this deep coal seam area. Then, a guide pipe 2 is introduced into the borehole, and a crushing slot device 3 is attached to the engaging end of the adjacent guide pipe 2. The initial position of the telescopic docking head 667 of the crushing slot device 3 is located inside the second docking ring 67. After the installation of the guide pipe 2 is completed, the crushing agent is filled into the guide pipe 2 through the crushing agent supply device 1. When the crushing agent passes through the area where the crushing slot device 3 is located, it is combined with Figure 2, and the high-pressure flow of the crushing agent is Accordingly, the telescopic carriage 62 is pushed to the right, and the right end of the mounting shaft 63 moves to the top seat of the position limiting strip 43. At this time, the first guide cone-shaped tube 64 tightly fits with the second docking ring 67, and the telescopic docking head 667 tightly fits with the first docking ring 44, restricting the flow path of the fracturing agent. At this time, the flow control frame 68 is in the right part of the change shown in Figure 7, and the fracturing agent flows from the inner contraction port of the flow control frame 68 and hits the engaging spring 664, forming a gap between the inner contraction port of the flow control frame 68 and the flow blocking blade 668. The liquid energy in the chamber increases and is ejected from the jet anti-reflection hole 511 in the crushing slot pipe 55. The pushing action of the inverted trapezoidal snap ring 665 on the expandable trapezoidal plug 510, combined with the continuous slot depth of the crushing slot pipe 55 and the restricting action of the coal seam, causes the crushing slot pipe 55 to gradually open. As shown in FIG. 2, when the expandable trapezoidal plug 510 is compressed and inserted into the inverted trapezoidal snap ring 665, the fitting engagement between the expandable trapezoidal plug 510 and the inverted trapezoidal snap ring 665 takes the whole shape, the flow blocking blade 668 stops rotating, and the flow As the liquid energy in the chamber between the inner contraction port of the control frame 68 and the flow blocking vane 668 increases again, the flow blocking vane 668 provides a certain torque to the entire slot assembly 5, and along with the impact slot of the jet anti-reflection hole 511, the slot assembly 5 rotates around its axis, that is, in the process of high-pressure flow of the fracturing agent, the fracturing slot pipe 55 opens along the axial plane, and when the expandable trapezoidal plug 510 is compressed and inserted into the inverted trapezoidal snap ring 665, the fracturing slot pipe 55 rotates around its axis. [Explanation of symbols]

[0023] 1. Demolition agent supply device 2 Flow guide tube 3 Crushing slot device 4. Storage position limit assembly 5-slot assembly 6 Energy Increase Assembly 7 First rotating ring 8 wire 41 First Mounting Cylinder 42 Containment Tank 43 Position limit strip 44 First Docking Ring 51 Second mounting tube 52 Storage Compartment 53 Rotating Disk 54 Communication pipe 55 Crushed slot pipe 56 Telescopic Top Rod Frame 57 Slider Rail 58 Occluder 59 Latch Skateboard 510 Extendable Trapezoidal Plug 511 Jet reflection prevention hole 61 Third Mounting Tube 62 Telescopic carriage 63 Mounting shaft 64 First conical guide tube 65 Second conical guide tube 66 Energy Increase Flow Blocking Frame 67 Second Docking Ring 68 Flow Control Frame 661 Second rotating ring 662 Guide Bar 663 Engagement spring 664 Flow Blocking Disk 665 Inverted trapezoid snap ring 666 Small diameter ring 667 Telescopic Docking Head 668 Flow blocking blade 669 Long cylindrical ring 681 Mounting ring 682 Joint 683 Short Rotating Axis 684 Fan flitch 685 Reinforcement bar 686 Traction Elastic Member

Claims

1. a demolition agent supplying device for supplying a demolition agent; A plurality of flow pipes which are provided in a borehole opened in a deep coal seam and are supply paths for the fracturing agent supplied by the fracturing agent supply device and are engaged with each other; a crushing slot device used to engage two adjacent flow conduits; A deep coal seam crushing slot anti-reflection device comprising: The crushing slot device an energy augmentation assembly disposed at one end of the flow tube; a storage position limiting assembly provided at the other end of the flow tube; a slot assembly, the slot assembly having opposite ends attached to the energy increasing assembly and the storage position limiting assembly via first pivot rings, respectively, and rotatable about an axial direction of the flow guide tube; Including, The first rotating ring is a link centered in the axial direction, The slot assembly includes: a second mounting barrel having two parts that contact and fit with the energy augmentation assembly and the storage position limiting assembly, respectively; a storage compartment disposed between the two parts of the second mounting barrel and circumferentially distributed along the inner wall of the flow pipe; an occluder that seals and blocks the outer diameter opening of the storage compartment; a rotating disk attached to the occluder; a communication pipe provided on the rotary disk and communicating the outside of the outer diameter opening of the storage compartment with the inner diameter opening of the storage compartment; a crushing slot pipe, which is a slot pipe connected to communicate with an end of the communication pipe that communicates with the outside of the outer diameter opening of the storage compartment; a plurality of jet reflection prevention holes, which are holes provided in the pipe wall of the crushing slot pipe, and which can eject the crushing agent filled in the communicating pipe from the plurality of holes; a telescopic top rod frame connected to an end of the communication pipe that communicates with the inner diameter opening of the storage compartment; a slider rail provided along the axial direction on a side wall of the inner diameter opening of the storage compartment; A latch skateboard that slides on the slider rail, wherein the upper surface of the latch skateboard is provided with card teeth that are engaged with and fitted into the telescopic top rod frame, and a telescopic trapezoid plug is provided that is fixed vertically to the lower surface of the latch skateboard; Including, The jet reflection prevention hole is provided in a pipe wall region of the crushing slot pipe facing outward from the outer cylinder wall of the second mounting cylinder. A deep coal seam crushing slot anti-reflection device characterized by:

2. The storage position limiting assembly includes: a first mounting barrel mounted in contact with the second mounting barrel; a receiving tank provided in an outer barrel wall of the first mounting barrel at one end near the slot assembly; a first docking ring attached to an inner cylinder wall at one end of the first mounting cylinder near the slot assembly, the first docking ring contacting the second mounting cylinder; 2. The deep coal seam crushing slot anti-reflection device according to claim 1, further comprising: a position limiting strip provided on a side of the slot assembly away from the first docking ring and fixed to an inner cylinder wall of the first mounting cylinder.

3. the energy augmentation assembly comprising: a third mounting barrel mounted in contact with the second mounting barrel; a second docking ring provided on an inner cylinder wall at one end of the third mounting cylinder near the slot assembly; a mounting shaft disposed in the axial direction, one end of the mounting shaft being fixed to a position limiting strip and the other end of the mounting shaft being fixed to the energy augmentation assembly; a telescopic carriage, one end of which is provided on a side of the second docking ring away from the slot assembly and connected to an inner cylindrical wall of the third mounting cylinder, and the other end of which is fixed to one end of the mounting shaft; a first flow cone-shaped tube and a second flow cone-shaped tube fixed to both ends of the mounting shaft, respectively, and having openings facing each other; an energy increasing flow blocking frame that is attached to the mounting shaft, the first flow cone, and the second flow cone; Including, The deep coal seam crushing slot anti-reflection device according to claim 2.

4. The energy increasing flow blocking frame is two rotatable second rotating rings attached to both ends of the mounting shaft, respectively; a guide bar, the two second rotating rings of which face each other, extending along the axial direction between the annular surfaces of the two opposing second rotating rings and having both ends fixed to both ends of the mounting shaft; a flow blocking disk that is fitted onto the guide bar and slidably connected thereto; two springs connected to both ends of the flow blocking disc in the axial direction, respectively, and the ends of the two springs not connected to the flow blocking disc are connected to the annular surfaces of the two second rotating rings, respectively; two inverted trapezoidal snap rings provided on annular surfaces at both ends of the flow interruption disk along a direction perpendicular to the axial direction and capable of fitting with the ends of the expandable trapezoidal plug; two elongated cylindrical rings fixed to both axial ends of the flow interruption disk, respectively; a flow control frame attached to the inner wall of the first flow cone; Two small diameter rings attached to the outer wall of the second conical flow guide tube along a direction perpendicular to the axial direction; a groove formed inside the small diameter ring, and an expandable docking head provided in the groove; The deep coal seam crushing slot anti-reflection device according to claim 3.

5. The deep coal seam crushing slot anti-reflection device according to claim 4, characterized in that a flow blocking blade is fixed to the outer wall of the long cylindrical ring on the side closer to the second guide cone of the flow blocking disk.

6. The flow control frame includes: a mounting ring rotatable about the axial direction; a plurality of joints attached to an inner ring wall of the attachment ring, pivotable along the axial direction, and uniformly distributed around the circumference of the inner ring wall of the attachment ring; a plurality of sector flitches corresponding to the plurality of joints, The joint is fixedly connected to the outer arc surface end of the sector flitch so as to be rotatable via a short rotation shaft; The deep coal seam crushing slot anti-reflection device according to claim 4, characterized in that two reinforcing bars are fixed to each of the two side surfaces of the sector-shaped flitch along the radial direction of the sector-shaped flitch and offset from the center line of the sector-shaped flitch, one end of a traction elastic member is connected to each of the two reinforcing bars, and the other end of the traction elastic member is connected to the inner wall of the mounting ring.

7. The deep coal seam crushing slot anti-reflection device according to claim 3, characterized in that a wire that penetrates and is introduced into the guide pipe is further connected to the end of the mounting shaft near one end of the telescopic carriage.

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