A deep coal seam slotted fracturing permeability device

Abstract

The application discloses a deep coal seam slotted fracturing permeability improvement device, which comprises a fracturing agent supply device, a flow guide pipe arranged in a drill hole formed in a deep coal seam and connected with an input end of the fracturing agent supply device, and a fracturing slotted device arranged on end portions of adjacent flow guide pipes and used for connecting the adjacent flow guide pipes.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, specifically to a deep coal seam fracturing and permeability enhancement device. Background Technology

[0002] In coal mining, to improve mining efficiency, coal seams are typically fractured to increase internal permeability, thereby improving gas extraction efficiency and volume. Currently, for fracture treatment in deep coal seams, the considerable depth makes conventional fracturing equipment inefficient to install and inconvenient for treating fracturing fractures in various coal seam areas.

[0003] Therefore, those skilled in the art have provided a deep coal seam fracturing and permeability enhancement device to solve the problems mentioned in the background art. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a deep coal seam fracturing and permeability enhancement device, comprising:

[0005] Fracturing agent supply device;

[0006] The guide pipe is installed in a borehole drilled in a deep coal seam and connected to the input end of the fracturing agent supply device.

[0007] A fracturing and cutting device is provided at the end of an adjacent guide pipe and is used to connect adjacent guide pipes.

[0008] In a preferred embodiment of the present invention, the fracturing and cutting device includes:

[0009] The energy-boosting component is located at one end of the flow guide tube;

[0010] A accommodating and limiting component is disposed at the other end of the guide tube; and

[0011] The slit assembly is rotatably assembled at both ends with the energy-enhancing assembly and the accommodating and limiting assembly via rotating rings.

[0012] In a preferred embodiment of the present invention, the slit assembly includes:

[0013] The second mounting cylinder has a circumferentially distributed accommodating cavity on its annular wall near the energy enhancement component. A sealing seat is provided in the outer diameter of the accommodating cavity, and a rotating disk is installed in the sealing seat. The rotating disk has a connecting pipe that connects the outside of the outer diameter of the accommodating cavity and the inner diameter of the accommodating cavity. The outer opening of the connecting pipe is connected to a fracturing and cutting pipe. The wall of the fracturing and cutting pipe is provided with jet penetration enhancement holes. A telescopic top rod frame is fixed in the inner opening of the connecting pipe.

[0014] The slide rail is axially positioned on the inner diameter sidewall of the accommodating cavity; and

[0015] The toothed slide plate slides in the slide rail. Its upper plate surface has teeth that engage with the telescopic top rod frame, and its lower plate surface has a telescopic trapezoidal top that is fixed vertically to it.

[0016] In a preferred embodiment of the present invention, the jet penetration enhancement hole is disposed on one side of the mounting cylinder wall facing away from the cylinder wall.

[0017] In a preferred embodiment of the present invention, the accommodating and limiting component includes an installation cylinder, the outer cylinder wall of which is provided with an accommodating groove at one end toward the slit assembly, and the inner cylinder wall of which is provided with a docking ring at one end toward the slit assembly. A limiting bracket fixed to the inner cylinder wall of the installation cylinder is also provided on the inner side of the docking ring.

[0018] In a preferred embodiment of the present invention, the power enhancement component includes:

[0019] Mounting cylinder three, with a connecting ring two fixed on the inner wall of the cylinder near the end of the slit assembly;

[0020] A telescopic carriage, one end of which is connected to the inner wall of the mounting cylinder three located inside the docking ring two, and the other end of which is coaxially fixed to a mounting shaft. At both ends of the mounting shaft are respectively fixed a flow guide cone one and a flow guide cone two with their openings facing each other, and the cone walls of the flow guide cone one and the flow guide cone two are respectively provided with a flow guide port one and a flow guide port two; and

[0021] An energy-enhancing flow-blocking frame that is installed in conjunction with the aforementioned shaft, flow-guiding cone one, and flow-guiding cone two.

[0022] In a preferred embodiment of the present invention, the energy-enhancing flow-blocking frame includes:

[0023] Rotating ring two is rotatably installed at both ends of the mounting shaft, and guide rods are fixed between the two sets of rotating ring two faces of the ring surface;

[0024] The flow-blocking disc is fitted onto the mounting shaft and guide rod and slidably connected. Connecting springs are connected to both ends of its axial center. An inverted trapezoidal retaining ring is provided on its outer ring surface, which can be engaged with the end of the telescopic trapezoidal top. The other ends of the connecting springs on both sides are connected to the two ring surfaces of the rotating rings on both sides. Long cylindrical rings are also fixed to both ends of the flow-blocking disc in the middle.

[0025] The flow control frame is installed on the inner wall of the guide cone.

[0026] The constriction ring is installed on the outer wall of the guide cone, and a groove is provided inside the constriction ring, with a telescopic connector inside the groove.

[0027] In a preferred embodiment of the present invention, the flow-blocking disk has flow-blocking fan blades fixed to the outer wall of the long cylindrical ring on the side of the flow-guiding cylinder.

[0028] In a preferred embodiment of the present invention, the flow control frame includes a mounting ring, on which a hinge joint capable of axially swinging is rotatably mounted, and multiple sets are evenly distributed circumferentially. A short rotating shaft is rotatably mounted at the lower end of the hinge joint, and the lower end of the short rotating shaft is fixedly connected to the outer arc end of the fan-shaped plate. Reinforcing ribs are fixed on both sides of the fan-shaped plate, and the two sets of reinforcing ribs are respectively offset from the center line of the fan-shaped plate and arranged in opposite directions. Furthermore, tension elastic elements connected to the inner wall of the mounting ring are provided on both sides of the hinge joint, and the other ends of the tension elastic elements on both sides are respectively connected to the reinforcing ribs on both sides.

[0029] In a preferred embodiment of the present invention, the end of the mounting shaft near one end of the telescopic slide is also connected to a wire that passes through the guide tube.

[0030] Compared with the prior art, the present invention provides a deep coal seam fracturing and permeability enhancement device, which has the following beneficial effects:

[0031] In this invention, a fracturing and cutting device is installed during the laying of the guide pipe to flexibly locate the deep layers of each region of the coal seam. The energy-enhancing component, the cutting component, and the accommodating and limiting component allow for diverse choices of the coal seam cutting shape and angle. This enables flexible selection of the coal seam cutting surface position based on the coal seam texture and structure, further improving the stability, smoothness, and efficiency of the cutting process. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the deep coal seam fracturing and permeability enhancement device of the present invention.

[0033] Figure 2 This is a schematic diagram of the fracturing and cutting device of the present invention;

[0034] Figure 3 This is an enlarged schematic diagram of a partial structure of the slit assembly of the present invention;

[0035] Figure 4 This is an enlarged schematic diagram of a portion of the fracturing and slotting tube structure of the present invention;

[0036] Figure 5 This is an enlarged schematic diagram of a partial structure of the energy-enhancing component of the present invention;

[0037] Figure 6 This is an enlarged schematic diagram of a portion of the flow control frame structure of the present invention;

[0038] Figure 7 This is a schematic diagram illustrating the deformation of the flow control frame according to the present invention;

[0039] In the diagram: 1. Fracturing agent supply device; 2. Guide pipe; 3. Fracturing slotting device; 4. Containment and limiting assembly; 5. Slotting assembly; 6. Energy enhancement assembly; 7. Rotating ring one; 8. Wire rope; 41. Mounting cylinder one; 42. Containment groove; 43. Limiting stop; 44. Connecting ring one; 51. Mounting cylinder two; 52. Containment cavity; 53. Rotating disk; 54. Connecting pipe; 55. Fracturing slotting pipe; 56. Telescopic top rod frame; 57. Slide rail; 58. Sealing seat; 59. Clamping slide plate; 510. Telescopic trapezoidal top head; 511. Jet penetration enhancement orifice; 61. 62. Installation cylinder 3; 63. Telescopic slide; 64. Installation shaft; 65. Flow guide cone 1; 66. Flow guide cone 2; 67. Energy-enhancing flow-blocking frame; 68. Connecting ring 2; 69. Flow control frame; 60. Rotating ring 2; 61. Guide rod; 62. Connecting spring; 63. Flow-blocking disc; 64. Inverted trapezoidal retaining ring; 65. Narrowing ring; 666. Telescopic joint; 67. Flow-blocking fan blade; 681. Installation ring; 682. Hinge joint; 683. Short rotating shaft; 684. Fan-shaped plate; 685. Reinforcing rib; 686. Tension elastic element. Detailed Implementation

[0040] Reference Figure 1-7 The present invention provides a technical solution: a deep coal seam fracturing and permeability enhancement device, comprising:

[0041] Fracturing agent supply device 1;

[0042] The guide pipe 2 is installed in a borehole in a deep coal seam and is connected to the input end of the fracturing agent supply device 1.

[0043] The fracturing and cutting device 3 is configured to be installed at the end of the adjacent guide pipe 2 and to connect the adjacent guide pipe 2.

[0044] The fracturing and cutting device 3 includes:

[0045] The energy-boosting component 6 is installed at one end of the flow guide pipe 2;

[0046] The receiving and limiting component 4 is disposed on the other end of the guide tube 2; and

[0047] The slit assembly 5 is rotatably assembled at both ends with the energy-enhancing assembly 6 and the accommodating and limiting assembly 4 via rotating rings 7, respectively.

[0048] In this specific implementation, the energy-enhancing component 6 and the accommodating and limiting component 4 are pre-fixed and assembled at both ends of the guide pipe. When the guide pipe is docked and installed, the slit assembly is then installed. The slit assembly is installed and connected to the corresponding end of the energy-enhancing component and the accommodating and limiting component by rotating the ring.

[0049] The slit assembly 5 includes: a mounting cylinder 51, which has circumferentially distributed receiving cavities 52 on its annular wall near the energy-boosting assembly. A sealing seat 58 is provided in the outer diameter opening of the receiving cavity 52. ​​(Refer to...) Figure 3 The transverse sealing intercepts and blocks the outer diameter of the accommodating cavity. A rotating disk 53 is installed in the sealing seat 58. The rotating disk 53 is provided with a connecting pipe 54 that connects the outside of the outer diameter of the accommodating cavity and the inner diameter of the accommodating cavity. The outer port of the connecting pipe 54 is connected to a fracturing and cutting pipe 55. The wall of the fracturing and cutting pipe 55 is provided with a jet penetration enhancement hole 511. A telescopic top rod frame 56 is fixed to the inner port of the connecting pipe 54. A sliding rail 57 is axially arranged on the side wall of the inner diameter of the accommodating cavity. A toothed sliding plate 59 slides in the sliding rail 57. The teeth on its upper plate are engaged with the telescopic top rod frame 56. The lower plate is provided with a telescopic trapezoidal top head 510 that is vertically fixed to it. The trapezoidal end of the telescopic trapezoidal top head 510 is provided with a concave hole. The jet penetration enhancement hole 511 is located in the area on the side opposite to the wall of the second cylinder.

[0050] In this specific implementation, refer to Figure 3 In other words, when the telescopic trapezoidal top is subjected to force, it will tend to move to the right. The locking tooth slide plate will lock the trapezoidal end of the telescopic top rod frame and also tend to move to the right. The telescopic top rod frame will have an automatic retraction tendency, which will cause the rotating disk to have a counterclockwise rotation tendency. As the fracturing and cutting pipe continuously cuts the coal seam, the side of the telescopic trapezoidal top will move to the right in sync, which will then be transmitted to the fracturing and cutting pipe to rotate and open axially in sync, thereby cutting the coal seam in the direction of the guide pipe.

[0051] Preferably, the telescopic trapezoidal mandrel in this embodiment is configured in multiple specifications. That is, under the same pressure, the contraction amount of the multiple specifications of telescopic trapezoidal mandrels is different. Therefore, before the inverted trapezoidal retaining ring is fitted and secured with the telescopic trapezoidal mandrel, the different axial movement amounts of the inverted trapezoidal retaining ring can be obtained. This allows control over the angle of rotation and opening of the axial surface of the fracturing cutter. Therefore, when selecting the cut surface for the coal seam, the fracturing cutter has a variety of choices for the axial cut surface and the cutting surface around the cut surface. This allows for flexible selection of the cut surface position of the coal seam based on the coal seam texture and structure.

[0052] The accommodating and limiting component 4 includes an installation cylinder 41, the outer cylinder wall of which is provided with an accommodating groove 42 and the inner cylinder wall of which is provided with a docking ring 44. A limiting bracket 43 fixed to the inner cylinder wall of the installation cylinder 41 is also provided on the inner side of the docking ring 44.

[0053] The energy-enhancing component 6 includes: a mounting cylinder 3 61, on which a docking ring 2 67 is fixed on the inner wall of the cylinder facing one end of the cutting component; a telescopic slide 62, one end of which is connected to the inner wall of the mounting cylinder 3 located inside the docking ring 2 67, and the other end of which is coaxially fixed to a mounting shaft 63. At both ends of the mounting shaft 63 are respectively fixed a flow guide cone 1 64 and a flow guide cone 2 65 with their openings facing each other. The cone walls of the flow guide cone 1 64 and the flow guide cone 2 65 are respectively provided with a flow guide port 1 and a flow guide port 2. The structure of the flow guide port 1 and the flow guide port 2 allows for the fracturing agent to be fully filled into the entire laid flow guide pipe before... This reduces the resistance to the fracturing agent's flow in the guide pipe. In other words, the initial kinetic energy supplied by the fracturing agent supply device in the guide pipe must be sufficient to ensure that the impact energy on the telescopic slide is insufficient to cause the telescopic slide to move completely to the right, so as to reduce the impact of the fracturing agent on the fracturing cutting device at this time. After the fracturing agent is completely filled into the entire laid guide pipe, the supply kinetic energy of the fracturing agent is increased again, so that all the fracturing cutting devices can operate relatively synchronously, enhancing the control of coal seam cutting; and an energy-enhancing flow-blocking frame 66 is installed in conjunction with the shaft 63, the first guide cone 64, and the second guide cone 65.

[0054] The energy-enhancing flow-blocking frame 66 includes: a second rotating ring 661, rotatably mounted on both ends of the mounting shaft, with a guide rod 662 fixed between the two sets of the second rotating rings 661 facing the annular surface; a flow-blocking plate 664, sleeved on the mounting shaft and the guide rod and slidably connected, with connecting springs 663 connected to both ends of its axial center, and an inverted trapezoidal retaining ring 665 on its outer annular surface that can engage with the end of the telescopic trapezoidal top 510; the other ends of the connecting springs on both sides are connected to the annular surfaces of the second rotating rings on both sides, and a long cylindrical ring is fixed to both ends of the flow-blocking plate 664 in the middle; a flow control frame 68, mounted on the inner wall of the first flow-guiding cone; and a constriction ring 666, mounted on the outer wall of the second flow-guiding cone, with a groove inside, and a telescopic connector 667 inside the groove.

[0055] In this specific implementation, when the first guide cone and the second docking ring, the first telescopic connector and the first docking ring are engaged, the fracturing agent is restricted from accelerating its flow through the first guide port. After being amplified by the flow control frame, it impacts the flow-blocking plate. Under the action of the connecting spring, the fracturing agent in the local chamber where the connecting pipe is located will be filled into the connecting pipe, enter the fracturing and cutting pipe, and be sprayed out through the jet permeability enhancement hole to cut the coal seam. The inverted trapezoidal retaining ring is also provided with a protruding post that can be engaged with the concave hole so that the inverted trapezoidal retaining ring can be fitted and secured with the telescopic trapezoidal top head. In addition, the structure of the telescopic connector and the constriction ring is designed so that the diameter of the second guide cone is set to be smaller so as to preserve the energy of the fracturing agent in the chamber where the flow-blocking plate is located. Initially, the telescopic connector is located inside the third mounting cylinder. When it moves to the right, it can pass through the telescopic trapezoidal top head more smoothly.

[0056] Preferably, the flow-blocking disc 664 is fixed with a flow-blocking fan blade 668 on the outer wall of the long cylindrical ring on the side of the flow-guide cylinder 2, thereby utilizing the kinetic energy of the fracturing agent to convert it into energy that can drive the cutting assembly to rotate. It also facilitates the smooth flow of the fracturing agent and prevents some substances in the fracturing agent from accumulating in the cutting assembly area.

[0057] The flow control frame 68 includes a mounting ring 681, on which a hinge joint 682, which can swing axially, is rotatably mounted on its inner ring wall. Multiple sets of hinge joints are evenly distributed around the circumference. A short rotating shaft 683 is rotatably mounted on the lower end of the hinge joint 682. The lower end of the short rotating shaft 683 is fixedly connected to the outer arc end of the fan-shaped plate 684. Reinforcing ribs 685 are fixed on both sides of the fan-shaped plate 684. The two sets of reinforcing ribs 685 are respectively offset from the center line of the fan-shaped plate 684 and are arranged in opposite directions. Furthermore, tension elastic elements 686 are provided on both sides of the hinge joint and connected to the inner wall of the mounting ring 681. The other ends of the tension elastic elements 686 on both sides are respectively connected to the reinforcing ribs 685 on both sides. The end of the mounting shaft 63 near one end of the telescopic slide is also connected to a wire 8 that passes through the guide tube 2.

[0058] In this specific implementation, as the flow intensity of the fracturing agent increases, such as Figure 7 As shown, the flow control frame in this structure can change the diameter of the fracturing agent under the action of the fracturing agent, especially in the area where it is located. That is, when the flow control frame is in the left part of the change, the fracturing agent in the area where the fracturing cut pipe is located will further increase in energy as the energy of the fracturing agent increases. In order to control the energy increment required by the fracturing cut pipe to cut the coal seam when the fracturing cut pipe is not in the rotation mode, when the flow control frame is in the right part of the change, the flow control frame reduces the energy increase of the fracturing agent in order to ensure the safety and strength of the fracturing cut device.

[0059] In practice, the deep coal seam area requiring fracturing and permeability enhancement is selected, and boreholes are drilled at the desired locations within this area. After completion, guide pipes are introduced into the boreholes. Fracturing and fracturing devices are installed at the connecting ends of adjacent guide pipes. The initial position of the telescopic joint of the fracturing and fracturing device is located inside the second connecting ring. After the guide pipes are laid, fracturing agent is injected into them via a fracturing agent supply device. When the fracturing agent passes through the area where the fracturing and fracturing devices are located, it combines with... Figure 2 As the fracturing agent flows under high pressure, it pushes the telescopic slide to the right, causing the right end of the mounting shaft to move and abut against the limiting stop. At this point, the first guide cone and the second docking ring are tightly fitted together, and the telescopic joint and the first docking ring are tightly fitted together. Therefore, the flow channel of the fracturing agent is restricted, and it flows through the inner constriction of the flow control frame and impacts the flow-blocking plate. The liquid energy in the chamber between the inner constriction of the flow control frame and the flow-blocking fan blades increases, and it is ejected from the fracturing jet hole in the fracturing cut pipe. Combined with the pushing action of the inverted trapezoidal retaining ring on the telescopic trapezoidal top head, the continuous cutting depth of the fracturing cut pipe, and the restrictive effect of the coal seam, the fracturing cut pipe will gradually open. Figure 2 As shown, when the telescopic trapezoidal top is compressed and embedded in the inverted trapezoidal retaining ring, the telescopic trapezoidal top and the inverted trapezoidal retaining ring are locked together as a whole. The flow-blocking fan blade stops rotating, and the liquid energy in the chamber between the inner constriction of the flow control frame and the flow-blocking fan blade increases again. The flow-blocking fan blade provides a certain torque to the entire cutting assembly. As the jet permeation enhancement orifice impacts the cutting, the cutting assembly moves in a rotating direction to cut the cutting. In other words, during the high-pressure flow of the fracturing agent, the fracturing permeation enhancement tube will open axially. When the telescopic trapezoidal top is compressed and embedded in the inverted trapezoidal retaining ring, the fracturing tube will rotate around to cut the cutting.

[0060] The above description is merely a preferred embodiment of the invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A deep coal seam slotted fracturing anti-reflection device, characterized in that, It includes: Fracturing agent supply device (1); Flow guide pipe (2) is arranged in the drill hole opened in deep coal seam and is connected with the input end of the fracturing agent supply device (1); Fracturing slotting device (3) is arranged on the end of the adjacent flow guide pipe (2) and is used for connecting the adjacent flow guide pipe (2); The fracturing slotting device (3) comprises: Energy increasing assembly (6) is arranged on one end of the flow guide pipe (2); The accommodation limiting assembly (4) is arranged on the other end of the flow guide pipe (2); and The slotting assembly (5) is rotatably assembled with the energy increasing assembly (6) and the accommodation limiting assembly (4) through rotating ring one (7) at both ends respectively; The slotting assembly (5) comprises: The mounting cylinder two (51) is provided with circumferentially distributed accommodation cavities (52) on the ring wall of one end of the energy increasing assembly, the outer diameter port in the accommodation cavity (52) is provided with a blocking seat (58), the rotating disc (53) is mounted in the blocking seat (58), the communication pipe (54) for connecting the outer diameter port outside the accommodation cavity and the inner diameter port of the accommodation cavity is arranged in the rotating disc (53), the fracturing slotting pipe (55) is communicated with the outer pipe port of the communication pipe (54), the jet flow penetration hole (511) is arranged on the pipe wall of the fracturing slotting pipe (55), and the telescopic jack frame (56) is fixed on the inner pipe port of the communication pipe (54); The sliding groove rail (57) is axially arranged on the inner diameter port side wall of the accommodation cavity; and The clamping tooth sliding plate (59) is slidably arranged in the sliding groove rail (57), the upper plate surface clamping tooth of the clamping tooth sliding plate (59) is clamped and embedded with the telescopic jack frame (56), and the lower plate surface of the clamping tooth sliding plate (59) is provided with the telescopic trapezoidal head (510) which is vertically fixed.

2. The device according to claim 1, wherein, The jet flow penetration hole (511) is arranged on the side region away from the mounting cylinder two barrel wall.

3. The device according to claim 1, wherein, The accommodation limiting assembly (4) comprises the mounting cylinder one (41), the outer cylinder wall of one end of the slotting assembly is provided with the accommodation groove (42), the inner cylinder wall of one end of the slotting assembly is provided with the butt joint ring one (44), and the inner side of the butt joint ring one (44) is further provided with the limiting stop frame (43) fixed on the inner cylinder wall of the mounting cylinder one (41).

4. The device according to claim 1, wherein, The energy increasing assembly (6) comprises: The mounting cylinder three (61) is fixed with the butt joint ring two (67) on the inner cylinder wall of one end of the slotting assembly; The telescopic sliding frame (62) is connected at one end to the inner cylinder wall of the mounting cylinder three on the inner side of the butt joint ring two (67), the other end of the telescopic sliding frame (62) is coaxially fixed with the mounting shaft rod (63), the mounting shaft rod (63) is respectively fixed at both ends with the guide cone cylinder one (64) and the guide cone cylinder two (65) which are arranged with the opening facing each other, and the cone wall of the guide cone cylinder one (64) and the guide cone cylinder two (65) is respectively provided with the guide port one and the guide port two; and The energy increasing flow resistance frame (66) is installed in cooperation with the shaft rod (63), the guide cone cylinder one (64) and the guide cone cylinder two (65).

5. The device according to claim 4, wherein, The energy increasing flow resistance frame (66) comprises: The rotating ring two (661) is rotatably installed at both ends of the mounting shaft rod, and the guide rod (662) is fixed between the ring surfaces of the two groups of rotating ring two (661). The choke disc (664) is sleeved on the installation shaft rod and the guide rod and is in sliding connection, axial middle portions of two sides of the choke disc (664) are respectively connected with the connecting springs (663), an outer side ring surface of the choke disc (664) is provided with the inverted trapezoidal clamping ring (665) which can be clamped with the end portion of the telescopic ladder-shaped top head (510), the other ends of the connecting springs (663) on two sides are respectively connected with the two ring surfaces of the rotating ring, and the long barrel rings are respectively fixed on the axial middle portions of two sides of the choke disc (664); The flow control frame (68) is installed on an inner cylinder wall of the flow guide cone; The necked ring (666) is installed on an outer cylinder wall of the flow guide cone, and a recess is formed in the necked ring (666), and the telescopic butt joint (667) is arranged in the recess.

6. The device according to claim 5, wherein, The long barrel rings on two sides of the choke disc (664) are respectively fixed with the choke fan blades (668).

7. The device according to claim 5, wherein, The flow control frame (68) comprises the mounting ring (681), the hinge joints (682) which can be axially face swung are rotationally installed on an inner ring wall of the mounting ring (681) and are circumferentially and uniformly distributed in multiple groups, the short rotating shafts (683) are rotationally installed on lower ends of the hinge joints (682), the outer arc surface ends of the fan-shaped pasting plates (684) are fixedly connected with lower ends of the short rotating shafts (683), the reinforcing ribs (685) are fixed on two side surfaces of the fan-shaped pasting plates (684), the reinforcing ribs (685) on two sides are respectively offset from the center lines of the fan-shaped pasting plates (684) and are oppositely arranged, and the pulling elastic members (686) are connected to the inner wall of the mounting ring (681) on two sides of the hinge joints (682), the other ends of the pulling elastic members (686) on two sides are respectively connected with the reinforcing ribs (685) on two sides.

8. The device according to claim 4, wherein, The installation shaft rod (63) on one end of the telescopic sliding frame is further connected with the wire rope (8) which penetrates the flow guide pipe (2).

Images