A continuous pipe-laying system for a plug-in screen pipe for coal mines

Abstract

The application provides a continuous pipe adding and conveying system of a plug-in screen pipe for a coal mine, which comprises a continuous pipe adding device, a slope type rod bin device is arranged in the lateral right side of the continuous pipe adding device, a conveying device is arranged in the longitudinal front side of the continuous pipe adding device, and a clamping device is arranged in the longitudinal front side of the conveying device. When the screen pipe is lowered, the full section inclination and height of a roadway are adjusted by the amplitude device, the slope type rod bin device has the functions of screen pipe storage and automatic alignment, the continuous pipe adding device has the functions of automatic conveying, coaxial centering and auxiliary plug-in of the screen pipe, the conveying device has the function of automatic lowering of the screen pipe, and the above structure realizes the full section screen pipe lowering construction. In the process of adding the screen pipe, manual intervention is not needed, the labor intensity of workers is reduced, and the safety of the screen pipe lowering construction of the coal seam gas extraction drilling is greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of gas extraction and control equipment, and relates to a screen pipe adding system, specifically a continuous adding and conveying system for plug-in screen pipes used in coal mines. Background Technology

[0002] Before coal mining, pre-gas drainage is essential to ensure safe production. Currently, underground tunnel drilling rigs are mainly used for gas drainage drilling. After drilling is completed, the drill string is removed, and a protective screen is lowered to the bottom of the borehole to prevent collapse and blockage of the gas passage due to excessive gas pressure or soft coal. The borehole inclination and height design vary depending on the mining area and geological strata, especially for bottom drainage roadways with cross-strata boreholes, which are generally designed at an inclination angle. When lowering the screen into the borehole after removing the drill string, the angle between the screen and the ground is relatively large, making it prone to slippage and endangering the safety of personnel lowering the screen, posing a significant safety hazard.

[0003] Currently, the installation of gas drainage borehole screens mainly relies on manual connection followed by mechanical or manual installation, one screen at a time. When using mechanical installation, the installation machinery is mounted on the feed device, and the drilling rig's amplitude is adjusted to meet different borehole inclination and height requirements. This method is heavily dependent on the drilling rig, preventing it from proceeding to the next borehole and reducing its utilization rate. It also requires manual intervention in adding and connecting pipes, making automation impossible, posing a risk of screen slippage and injury, and resulting in extremely high labor intensity. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a continuous pipe feeding and conveying system for plug-in screens in coal mines, solving the technical problem that the screen lowering process in existing technologies mainly relies on manual methods, which is labor-intensive and prone to danger.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A continuous pipe feeding and conveying system for plug-in screen pipes used in coal mines includes a continuous pipe feeding device; the horizontal left side of the continuous pipe feeding device is installed on a variable amplitude device, the horizontal right side of the continuous pipe feeding device is installed with a ramp-type bar bin device, the longitudinal front side of the continuous pipe feeding device is installed with the longitudinal rear side of the conveying device, and the longitudinal front side of the conveying device is installed with a clamping device.

[0007] The continuous tube feeding device includes a tube feeding device mounting frame, and a ramp-type bar bin device is installed inside the right side of the tube feeding device mounting frame. The right side of the tube feeding device mounting frame is open and serves as the screen tube inlet, with the screen tube inlet facing the ramp-type bar bin device.

[0008] The tube-adding device mounting bracket is rotatably mounted with a rotating shaft, which is arranged along the longitudinal direction. A rear indexing wheel is fixedly mounted on the axial rear part of the rotating shaft, and a front indexing wheel is fixedly mounted on the axial front part of the rotating shaft. A ratchet and pawl assembly is mounted on the longitudinal rear side of the tube-adding device mounting bracket, located longitudinally rear of the rear indexing wheel. A push rod assembly is mounted inside the longitudinal rear side of the tube-adding device mounting bracket, and a straightening assembly is mounted on the longitudinal rear side of the tube-adding device mounting bracket. The bottom of the push rod assembly is located below the rear indexing wheel, and the top of the push rod assembly passes through the straightening assembly and the rear indexing wheel sequentially from back to front. A centering assembly is mounted on the longitudinal front side of the tube-adding device mounting bracket, located longitudinally in front of the front indexing wheel.

[0009] The present invention also has the following technical features:

[0010] The ratchet and pawl assembly includes a rocker arm cylinder located on the right side of the rear indexing wheel. One end of the rocker arm cylinder is rotatably mounted on the longitudinal rear of the pipe-adding device mounting bracket, and the other end of the rocker arm cylinder is rotatably mounted on a rocker arm, which is rotatably mounted on a rotating shaft. A drive pawl is rotatably mounted on the rocker arm, and the other end of the drive pawl engages with the ratchet. The ratchet is fixedly mounted on the rotating shaft and located on the longitudinal rear side of the rear indexing wheel. A check pawl is mounted on the axial rear end of the pipe-adding device mounting bracket. The check pawl is located to the lower right of the drive pawl, and one end of the check pawl is rotatably mounted on the pipe-adding device mounting bracket, while the other end engages with the ratchet.

[0011] The push rod assembly includes a push rod cylinder mounting component fixedly installed on the pipe-adding device mounting bracket. A push rod cylinder is fixedly installed inside the push rod cylinder mounting component and is located below the rear indexing wheel. A push rod connecting frame is fixedly connected to the piston rod of the push rod cylinder. The push rod connecting frame is set upward in the vertical direction. The longitudinal rear end of the push rod is integrally connected to the top of the push rod connecting frame. A push rod protrusion is integrally provided on the longitudinal front end of the push rod. The push rod protrusion passes through the straightening component and the indexing wheel loading groove of the rear indexing wheel from back to front.

[0012] The correction assembly includes a correction connecting frame fixedly installed on the longitudinal rear side of the tube-adding device mounting frame. A left liner, a clamping plate, and a right liner are fixedly installed sequentially from left to right on the transverse right side of the correction connecting frame. The space enclosed by the left liner, the clamping plate, and the right liner is a correction groove, and the tip of the top rod can pass through the correction groove.

[0013] The centering assembly includes a centering mounting frame fixedly installed on the pipe-adding device mounting bracket. An upper centering body is fixedly installed on the top of the centering mounting frame, and a lower centering body is arranged below the upper centering body. The upper and lower centering bodies are connected by multiple springs. The space enclosed by the lower and upper centering bodies is the screen pipe centering cavity. A centering cylinder is fixedly installed on the bottom of the centering mounting frame. The centering cylinder is located below the lower centering body, and the piston rod of the centering cylinder is connected to the lower centering body.

[0014] The luffing device includes a lower base plate for a horizontal slewing assembly. A horizontal slewing reducer is fixedly mounted on the lower base plate and connected to an upper connecting plate of the horizontal slewing assembly. Driven by the horizontal slewing reducer, the upper connecting plate of the horizontal slewing assembly can rotate on the horizontal plane. A pair of columns are fixedly mounted on the upper connecting plate of the horizontal slewing assembly. A vertical slewing assembly connecting plate is movably mounted on the pair of columns. A vertical slewing reducer is mounted on the right side of the vertical slewing assembly connecting plate and connected to a longitudinal slide rail mounting plate. Driven by the vertical slewing reducer, the longitudinal slide rail mounting plate can rotate on the vertical plane. The system rotates; a lifting cylinder is vertically positioned between the pair of columns, with its bottom connected to a connecting plate on the horizontal rotating assembly, and its top fixedly connected to the left lateral side of the connecting plate on the vertical rotating assembly. Driven by the lifting cylinder, the longitudinal slide rail mounting plate can move up and down along the columns; a longitudinal slide rail is fixedly mounted on the top and bottom of the longitudinal slide rail mounting plate, and a translation cylinder is positioned on the outer side of the longitudinal slide rail. The longitudinal front of the translation cylinder is fixedly mounted on the outer side of the longitudinal slide rail, and the longitudinal rear of the translation cylinder is fixedly connected to the continuous pipe-adding device. Driven by the translation cylinder, the continuous pipe-adding device can move back and forth along the longitudinal direction within the longitudinal slide rail.

[0015] The inclined bar bin device includes a bar bin installed on the right side of the tube feeding device mounting frame. A screen tube outlet is opened on the left side of the bar bin, facing the continuous tube feeding device. A rack mounting plate is fixedly installed at the bottom of the bar bin, and a rack is fixedly installed on the bottom surface of the rack mounting plate. A bar bin cycloidal motor and a motor mounting box are arranged below the bar bin. The right side of the rack and the motor shaft of the bar bin cycloidal motor both extend into the motor mounting box. A gear is installed on the motor shaft of the bar bin cycloidal motor, and the gear meshes with the rack. The motor mounting box is fixedly connected to the bottom of the screen tube clamping frame, and the top of the screen tube clamping frame is located inside the bar bin.

[0016] A pull rod mounting component is installed on each of the longitudinal sides of the rod magazine. A clamp body is rotatably installed inside the pull rod mounting component. A pull rod mounting cavity is opened along the axial direction inside the clamp body. The top end of the pull rod is installed in the pull rod mounting cavity, and the bottom end of the pull rod is installed on the pipe-adding device mounting frame.

[0017] The conveying device includes a conveying box, with a conveying device screen tube inlet on the longitudinal rear side and a conveying device screen tube outlet on the longitudinal front side. A conveying cycloidal motor is fixedly installed inside the top of the conveying box, and the conveying cycloidal motor is arranged in the transverse direction. A sprocket is rotatably mounted on the motor shaft of the conveying cycloidal motor. A pair of drive wheels are rotatably installed inside the conveying box below the conveying cycloidal motor. A sprocket is mounted on the central shaft of the drive wheel, and the sprocket is connected to the conveying cycloidal motor via a chain. A limit wheel is provided below the drive wheel. The transverse sides of the drive wheel and the limit wheel are in close contact, and the gap between the drive wheel and the limit wheel is the conveying channel through which the screen tube can pass. The bottom ends of two pairs of return springs are fixedly installed on the bottom surface of the conveying box. The top ends of the return springs are connected to the central shaft of the limit wheel, and a return cylinder is provided above the central shaft of the limit wheel.

[0018] The clamping device includes a clamping mounting frame, which is fixedly installed on the longitudinal front side of the conveying box. A clamping cylinder is fixedly installed on each of the two transverse sides of the clamping mounting frame. The clamping cylinders are arranged transversely, with the outer transverse end of the clamping cylinder being the cylinder end and the inner transverse end of the clamping cylinder being the cylinder rod end. A screen tube slot is provided in the middle of the clamping mounting frame, which is directly opposite the screen tube outlet of the conveying device. Slips are provided on both transverse sides of the screen tube slot, and the slips are fixedly connected to the cylinder rod end of the clamping cylinder.

[0019] Compared with the prior art, the present invention has the following technical effects:

[0020] (I) The continuous pipe feeding and conveying system for plug-in screen pipes used in coal mines of the present invention, when screen pipes are being lowered into the mine, uses a variable amplitude device to adjust the inclination angle and height of the entire cross-section of the roadway to match the inclination angle and height of the gas extraction borehole; the inclined bar bin device has screen pipe storage and automatic sorting functions, solving the problem of frequent manual handling and arrangement of screen pipes; the continuous pipe feeding device realizes the automatic conveying, coaxial alignment and auxiliary plugging functions of screen pipes, solving the safety problems of manual pipe feeding and connection; the conveying device realizes the automatic lowering function of screen pipes, solving the safety problems of manual lowering.

[0021] Through the above-mentioned structural design, this invention enables the full-section screen pipe lowering construction, eliminating the need for manual intervention during the screen pipe installation process, reducing the labor intensity of workers, and greatly improving the safety of screen pipe lowering construction in coal seam gas drainage boreholes.

[0022] (II) The continuous pipe feeding and conveying system for plug-in screen pipes in coal mines of the present invention realizes the placement of screen pipes by opening indexing wheel loading slots on the rear indexing wheel and the front indexing wheel; the ratchet and pawl assembly drives the ratchet to perform intermittent circular motion through the swing rod cylinder, swing rod and active pawl, and the ratchet rotates while driving the indexing wheel to rotate; when the screen pipe in the indexing wheel moves to the predetermined position, the push rod assembly can push the screen pipe into the borehole for screen pipe lowering, and the correction assembly plays a guiding role in the screen pipe lowering process.

[0023] Through the above-mentioned structural design, this invention enables the installation of screen pipes in underground coal mine gas drainage boreholes. No manual intervention is required during the installation of the screen pipes, reducing the labor intensity of workers and greatly improving the safety of the installation of screen pipes in coal seam gas drainage boreholes.

[0024] (III) The continuous pipe feeding and conveying system for plug-in screen pipes in coal mines of the present invention, by setting up large screen pipe loading troughs and small screen pipe loading troughs of different sizes, enables continuous pipe feeding operations of various screen pipes of different specifications without the need to replace parts during the lowering of screen pipes in gas drainage boreholes, thereby further reducing the labor intensity of workers.

[0025] (IV) The continuous pipe feeding and conveying system for plug-in screen pipes in coal mines of the present invention uses sensors to determine the position and completion status of the screen pipes and uses a controller to control the actions of each actuator, thereby realizing the logical control of the entire pipe feeding and conveying process and automating the drilling and protection hole. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the assembly structure of the continuous tube feeding device and the inclined bar storage device.

[0027] Figure 2 This is a schematic diagram of a continuous pipe feeding device.

[0028] Figure 3 This is a rear view of the continuous pipe feeding device.

[0029] Figure 4 This is a schematic diagram of the ratchet and pawl assembly.

[0030] Figure 5 This is a schematic diagram of the rear indexing wheel and the front indexing wheel.

[0031] Figure 6 This is a schematic diagram of the push rod assembly.

[0032] Figure 7 This is a schematic diagram of the corrective component.

[0033] Figure 8 This is a schematic diagram of the structure of the centering component.

[0034] Figure 9 This is a schematic diagram of the overall structure of a continuous pipe conveying system for plug-in screen pipes used in coal mines.

[0035] Figure 10 This is a schematic diagram of the amplitude transformer.

[0036] Figure 11 This is a schematic diagram showing the installation position of the vertical rotary reducer of the amplitude transformer.

[0037] Figure 12 This is a schematic diagram of a ramp-type bar and clip device.

[0038] Figure 13 This is a schematic diagram of the rack and pinion structure of a ramp-type rod magazine device.

[0039] Figure 14 This is a schematic diagram of the conveying device.

[0040] Figure 15 This is a schematic diagram of the internal structure of the conveying device.

[0041] Figure 16 This is a schematic diagram of the clamping device.

[0042] Figure 17 This is a control flowchart for a continuous pipe conveying system using plug-in screen pipes in coal mines.

[0043] The meanings of the labels in the diagram are as follows: 1-Continuous pipe feeding device, 2-Amplitude changing device, 3-Inclined bar holder device, 4-Conveying device, 5-Clamping device, 6-Five-way valve, 7-Six-way valve, 8-Diverter valve assembly, 9-Hydraulic lock.

[0044] 101-Pipe-adding device mounting bracket, 102-Rotating shaft, 103-Rear indexing wheel, 104-Front indexing wheel, 105-Ratchet and pawl assembly, 106-Top rod assembly, 107-Correcting assembly, 108-Centering assembly, 109-First sensor, 110-Second sensor, 111-Third sensor.

[0045] 201-Horizontal slewing assembly lower base plate, 202-Horizontal slewing reducer, 203-Horizontal slewing assembly upper connecting plate, 204-Column, 205-Vertical slewing assembly connecting plate, 206-Vertical slewing reducer, 207-Longitudinal slide rail mounting plate, 208-Lifting cylinder, 209-Longitudinal slide rail, 210-Translation cylinder.

[0046] 301-Bar bin, 302-Screen tube outlet, 303-Rack mounting plate, 304-Rack, 305-Bar bin cycloidal motor, 306-Motor mounting box, 307-Gear, 308-Screen tube clamping frame, 309-Tie rod mounting piece, 310-Clamping body, 311-Tie rod.

[0047] 401-Conveyor box, 402-Conveyor cycloidal motor, 403-Sprocket, 404-Drive wheel, 405-Limit wheel, 406-Conveyor channel, 407-Reset spring, 408-Reset cylinder.

[0048] 501-Clamping mounting bracket, 502-Clamping cylinder, 503-Screen tube slot, 504-Clamping slip.

[0049] 10301 - Indexing wheel body, 10302 - Rotating shaft mounting hole, 10303 - Large screen tube loading slot, 10304 - Small screen tube loading slot.

[0050] 10501 - Rocker arm cylinder, 10502 - Rocker arm, 10503 - Driving pawl, 10504 - Ratchet, 10505 - Check pawl, 10506 - Driving pawl mounting block, 10507 - Driving pawl limit spring, 10508 - Check pawl mounting block, 10509 - Check pawl limit spring.

[0051] 10601-Pushrod cylinder mounting part, 10602-Pushrod cylinder, 10603-Pushrod connecting bracket, 10604-Pushrod, 10605-Pushrod protrusion.

[0052] 10701-Correcting connecting frame, 10702-Left liner, 10703-Clamping plate, 10704-Right liner, 10705-Correcting slide.

[0053] 10801-Centering mounting bracket, 10802-Upper centering body, 10803-Lower centering body, 10804-Screen tube centering cavity, 10805-Centering cylinder.

[0054] 10303 - Large sieve tube loading trough, 10304 - Small sieve tube loading trough.

[0055] The specific content of the present invention will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0056] It should be noted that all components in this invention, unless otherwise specified, are components known in the art. For example, the horizontal rotary reducer 202 and the vertical rotary reducer 206 are both conventional rotary reducers known in the prior art. The lifting cylinder 208, the translation cylinder 210, the reset cylinder 408, the clamping cylinder 502, the swing rod cylinder 10501, the push rod cylinder 10602, and the centering cylinder 10805 are all conventional cylinders known in the prior art. The rod magazine cycloidal motor 305 and the conveying cycloidal motor 402 are both conventional cycloidal motors known in the prior art.

[0057] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0058] Example 1:

[0059] This embodiment provides a continuous tube feeding device, such as... Figure 1 As shown, it includes a pipe-adding device mounting bracket 101. A ramp-type bar bin device 3 is installed inside the right side of the pipe-adding device mounting bracket 101. The right side of the pipe-adding device mounting bracket 101 is open and serves as the inlet for the screen pipe, which faces the ramp-type bar bin device 3.

[0060] like Figure 1 and Figure 2 As shown, a rotating shaft 102 is rotatably mounted on the pipe-adding device mounting bracket 101, and the rotating shaft 102 is arranged along the longitudinal direction; a rear indexing wheel 103 is fixedly mounted on the axial rear part of the rotating shaft 102, and a front indexing wheel 104 is fixedly mounted on the axial front part of the rotating shaft 102; a ratchet and pawl assembly 105 is mounted on the longitudinal rear side of the pipe-adding device mounting bracket 101, and the ratchet and pawl assembly 105 is located longitudinally rear of the rear indexing wheel 103; the pipe-adding device mounting bracket 101... A top rod assembly 106 is installed inside the longitudinal rear side of the frame 101, and a straightening assembly 107 is installed on the longitudinal rear side of the pipe-adding device mounting frame 101. The bottom of the top rod assembly 106 is located below the rear indexing wheel 103, and the top of the top rod assembly 106 passes through the straightening assembly 107 and the rear indexing wheel 103 from back to front. A centering assembly 108 is installed outside the longitudinal front side of the pipe-adding device mounting frame 101, and the centering assembly 108 is located in the longitudinal front of the front indexing wheel 104.

[0061] In this embodiment, the rotating shaft 102, the rear indexing wheel 103, and the front indexing wheel 104 of the continuous tube feeding device 1 rotate under the drive of the ratchet and pawl assembly 105. During the rotation, the screen tube in the inclined bar bin device 3 is pressed into the indexing wheel loading groove 10302 and rotated to the set pushing position, waiting for the push rod assembly 106 to push it.

[0062] As one specific solution in this embodiment, such as Figure 3 and Figure 4As shown, the ratchet and pawl assembly 105 includes a rocker arm cylinder 10501 located laterally to the right of the rear indexing wheel 103. One end of the rocker arm cylinder 10501 is rotatably mounted on the longitudinal rear part of the pipe-adding device mounting bracket 101, and the other end of the rocker arm cylinder 10501 is rotatably mounted with one end of a rocker arm 10502. The other end of the rocker arm 10502 is rotatably mounted on the rotating shaft 102. One end of the active pawl 10503 is rotatably mounted on the rocker arm 10502. The other end of 503 meshes with ratchet 10504, which is fixedly mounted on rotating shaft 102 and located on the longitudinal rear side of indexing wheel 103. A check pawl 10505 is mounted on the axial rear end of pipe-adding device mounting bracket 101. The check pawl 10505 is located to the lower right of the driving pawl 10503. One end of the check pawl 10505 is rotatably mounted on pipe-adding device mounting bracket 101, and the other end of the check pawl 10505 meshes with ratchet 10504.

[0063] In this embodiment, the cylinder barrel of the rocker arm cylinder 10501 is rotatably connected to the pipe-adding device mounting bracket 101 via a pin, the piston rod of the rocker arm cylinder 10501 is rotatably connected to the rocker arm 10502 via a pin, the active pawl 10503 is rotatably connected to the rocker arm 10502 via a pin, and the ratchet 10504 is coaxial with the rotating shaft 102 and connected via a key. Under the action of the rocker arm cylinder 10501, the active pawl 10503 drives the ratchet 10504 to press... Intermittent rotational motion at a certain angle; the ratchet and pawl assembly 105 realizes the indexing and continuous rotational tube feeding functions of the continuous tube feeding device. The rear indexing wheel 103, the front indexing wheel 104 and the ratchet and pawl assembly 105 are all connected to the rotating shaft 102 by a key. The ratchet and pawl assembly 105 drives the rotating shaft 102, thereby driving the rear indexing wheel 103 and the front indexing wheel 104 to rotate, realizing the removal of tubes from the tube bin, and placing the screen tubes evenly in the indexing wheel loading groove 10302 at a certain angle along the circumferential direction of the rear indexing wheel 103.

[0064] In this embodiment, when the active pawl 10503 stops moving, the ratchet 10504 is prone to reverse rotation under the gravity of the screen tube. The check pawl 10505 can brake the ratchet 10504 after the active pawl 10503 stops moving, thereby avoiding the above-mentioned ratchet 10504 reverse rotation phenomenon.

[0065] As one specific solution in this embodiment, such as Figure 3 and Figure 4As shown, an active pawl mounting block 10506 is fixedly mounted on the rocker arm 10502, and one end of the active pawl 10503 is connected to the active pawl mounting block 10506; one end of the active pawl limiting spring 10507 is fixedly mounted on the active pawl mounting block 10506, and the other end of the active pawl limiting spring 10507 is fixedly connected to the active pawl 10503; in this embodiment, under the action of the active pawl limiting spring 10507, the tooth surface of the active pawl 10503 is in close contact with the tooth surface of the ratchet 10504 to ensure that the active pawl 10503 stably drives the ratchet 10504 to rotate.

[0066] As one specific solution in this embodiment, such as Figure 3 and Figure 4 As shown, a check pawl mounting block 10508 is fixedly mounted on the axial rear end of the pipe-adding device mounting bracket 101. One end of the check pawl 10505 is connected to the check pawl mounting block 10508. One end of the check pawl limiting spring 10509 is fixedly mounted on the check pawl mounting block 10508, and the other end of the check pawl limiting spring 10509 is fixedly connected to the check pawl 10505. In this embodiment, under the action of the check pawl limiting spring 10509, the tooth surface of the check pawl 10505 is in close contact with the tooth surface of the ratchet 10504 to ensure that the check pawl 10505 can stably brake the ratchet 10504.

[0067] As one specific solution in this embodiment, such as Figure 5 As shown, the rear indexing wheel 103 includes an indexing wheel body 10301, with a rotating shaft mounting hole 10302 at the center of the indexing wheel body 10301, and a main shaft 2 fixedly installed in the rotating shaft mounting hole 10302; multiple indexing wheel loading slots are provided on the edge of the indexing wheel body 10301, and the multiple indexing wheel loading slots are arranged along the circumferential direction of the indexing wheel body 10301, and the indexing wheel loading slots are used to load screen tubes; the indexing wheel loading slots include a large screen tube loading slot 10303 and a small screen tube loading slot 10304; the front indexing wheel 104 and the rear indexing wheel 103 have the same structure, and the indexing wheel loading slots of the front indexing wheel 104 and the rear indexing wheel 103 are arranged one-to-one.

[0068] In this embodiment, the large sieve tube loading groove 10303 and the small sieve tube loading groove 10304 are evenly spaced along the circumferential direction. The small sieve tube loading groove 10304 is used to load sieve tubes with outer diameters of 25mm and 32mm, and the large sieve tube loading groove 10303 is used to load sieve tubes with outer diameters of 40mm, 50mm and 63mm.

[0069] As one specific solution in this embodiment, such as Figure 6As shown, the push rod assembly 106 includes a push rod cylinder mounting component 10601 fixedly mounted on the pipe-adding device mounting bracket 101. A push rod cylinder 10602 is fixedly mounted inside the push rod cylinder mounting component 10601. The push rod cylinder 10602 is located below the rear indexing wheel 103. A push rod connecting bracket 10603 is fixedly connected to the piston rod of the push rod cylinder 10602. The push rod connecting bracket 10603 is arranged upward in the vertical direction. The longitudinal rear end of the push rod 10604 is integrally connected to the top end of the push rod connecting bracket 10603. A push rod protrusion 10605 is integrally provided on the longitudinal front end of the push rod 10604. The push rod protrusion 10605 passes through the straightening assembly 107 and the indexing wheel loading groove of the rear indexing wheel 103 from back to front.

[0070] In this embodiment, the push rod protrusion 10604 is a conical boss structure, which can coaxially position the screen tube during the pushing process. The push rod cylinder 10601 drives the push rod connecting frame 10602 and the push rod 10603 to drive the push rod protrusion 10604 to push the screen tube at the predetermined position, thereby achieving coaxial positioning of screen tubes of different specifications and pushing the screen tube out. At the same time, it can also assist in the insertion of two screen tubes in the front and rear.

[0071] As one specific solution in this embodiment, such as Figure 7 As shown, the correction assembly 107 includes a correction connecting frame 10701 fixedly installed on the longitudinal rear side of the tube-adding device mounting bracket 101. A left liner 10702, a clamping plate 10703, and a right liner 10704 are fixedly installed on the right side of the correction connecting frame 10701 from left to right. The space enclosed by the left liner 10702, the clamping plate 10703, and the right liner 10704 is a correction groove 10705. The top rod protrusion 10605 can pass through the correction groove 10705.

[0072] In this embodiment, the straightening chute 10705 has a U-shaped structure. During the process of pushing the screen tube, the push rod 10603 and the push rod tip 10604 move along the longitudinal direction in the straightening chute 10705. The straightening chute 10705 plays a guiding role for the push rod assembly 106.

[0073] As one specific solution in this embodiment, such as Figure 8As shown, the centering assembly 108 includes a centering mounting bracket 10801 fixedly mounted on the pipe-adding device mounting bracket 101. An upper centering body 10802 is fixedly mounted on the top of the centering mounting bracket 10801, and a lower centering body 10803 is disposed below the upper centering body 10802. The upper centering body 10802 and the lower centering body 10803 are connected by multiple springs. The space enclosed by the lower centering body 10803 and the upper centering body 10802 is the screen tube centering cavity 10804. A centering cylinder 10805 is fixedly mounted on the bottom of the centering mounting bracket 10801. The centering cylinder 10805 is located below the lower centering body 10803, and the piston rod of the centering cylinder 10805 is connected to the lower centering body 10803.

[0074] In this embodiment, the centering component 108 is a normally closed structure, which can prevent the screen tube inside the hole from suddenly sliding down and causing injury. The centering mounting bracket 10801 is fixedly connected to the tube feeding device mounting bracket 101 by bolts. Under normal conditions, the centering spring 10804 is in a compressed state, so that the lower centering body 10803 and the upper centering body 10802 are in complete contact and a stepped cylindrical structure screen tube centering cavity 10804 is formed inside. The screen tube centering cavity 10804 calibrates the male and female ends of the front and rear screen tubes coaxially to ensure that the height of the front and rear screen tubes is coaxial, which helps the screen tube to be inserted, improves the reliability of the insertion, and prevents the screen tube inside the hole from sliding down and causing injury. The centering cylinder drives the lower centering body 10803 to move downward. When the upper centering body 10802 and the lower centering body 10803 are out of contact, the screen tube is pushed by the push rod assembly 106 through the screen tube centering cavity 10804 and leaves the continuous tube feeding device.

[0075] As one specific solution in this embodiment, such as Figure 1 and Figure 2 As shown, a first sensor 109 is fixedly installed on the right side of the pipe-adding device mounting bracket 101. The first sensor 109 is located longitudinally behind the rear indexing wheel 103. A second sensor 110 is fixedly installed on the left side of the pipe-adding device mounting bracket 101. The second sensor 110 is located longitudinally in front of the push rod assembly 106. A third sensor 111 is fixedly installed on the longitudinal front side of the pipe-adding device mounting bracket 101. The third sensor 111 is located longitudinally in front of the front indexing wheel 104 and on the left side of the centering assembly 108.

[0076] In this embodiment, the first sensor 109 is used to detect whether the pushed screen tube has reached the insertion position. The second sensor 110 is used to detect whether the screen tube has reached the pushing position. After detecting the screen tube, it feeds a signal back to the controller, which controls the push rod assembly 106 to push the screen tube into the conveying device 4. The probe of the third sensor 111 is located in the probe hole of the centering assembly 108 and is used to detect the position of the female end of the screen tube. When the third sensor 111 detects the female end of the screen tube, the clamping device 5 is activated and clamps the screen tube. At this time, the female end of the screen tube is located at the large diameter of the screen tube centering cavity 10804 of the centering assembly 108, waiting for the next step of inserting a new screen tube.

[0077] As a specific embodiment, bearing seats are fixedly installed in the axial front end and axial rear end of the pipe-adding device mounting bracket 101, bearings are fixedly installed in the bearing seats, and rotating shafts 102 are installed in the bearings. In this embodiment, the bearing includes an outer ring and an inner ring. The outer ring does not rotate, while the inner ring can rotate. The rotating shaft 102 is rotatably installed through the bearing seats and the bearings.

[0078] As a specific solution in this embodiment, a plug-in pressure sensor is fixedly installed on the pipe-adding device mounting bracket 101. In this embodiment, the plug-in pressure sensor is used to detect the tightness of the plug-in of the male and female ends of the front and rear screen pipes. After the new screen pipe reaches the plug-in position, when the detected pressure reaches the set value, it indicates that the plug-in is firm and reliable, and the connected screen pipe can be lowered into the borehole.

[0079] Example 2:

[0080] This embodiment provides a continuous pipe feeding and conveying system for plug-in screen pipes used in coal mines. This system employs the continuous pipe feeding device of Embodiment 1, such as... Figure 9 As shown, the left side of the continuous pipe feeding device 1 is mounted on the luffing device 2, the right side of the continuous pipe feeding device 1 is mounted with a ramp-type bar holder device 3, the front side of the continuous pipe feeding device 1 is mounted with the rear side of the conveying device 4, and the front side of the conveying device 4 is mounted with a clamping device 5.

[0081] As one specific solution in this embodiment, such as Figure 9 As shown, the luffing device 2 includes a lower base plate 201 of a horizontal slewing assembly. A horizontal slewing reducer 202 is fixedly mounted on the lower base plate 201. The horizontal slewing reducer 202 is connected to an upper connecting plate 203 of the horizontal slewing assembly. Driven by the horizontal slewing reducer 202, the upper connecting plate 203 of the horizontal slewing assembly can rotate on the horizontal plane. Figure 10 and Figure 11As shown, a pair of columns 204 are fixedly installed on the horizontal rotary assembly connecting plate 203. A vertical rotary assembly connecting plate 205 is movably installed on the pair of columns 204. A vertical surface rotary reducer 206 is installed on the right side of the vertical rotary assembly connecting plate 205. The vertical surface rotary reducer 206 is connected to the longitudinal slide rail mounting plate 207. Driven by the vertical surface rotary reducer 206, the longitudinal slide rail mounting plate 207 can rotate in the vertical plane. Figure 10 As shown, a lifting cylinder 208 is vertically arranged between a pair of columns 204. The bottom of the lifting cylinder 208 is connected to the connecting plate 203 on the horizontal rotating assembly, and the top of the lifting cylinder 208 is fixedly connected to the left side of the connecting plate 205 on the vertical rotating assembly. Driven by the lifting cylinder 208, the longitudinal slide rail mounting plate 207 can move up and down along the columns 204; Figure 10 As shown, a longitudinal slide rail 209 is fixedly installed on the top and bottom of the longitudinal slide rail mounting plate 207, and a translation cylinder 210 is provided on the outer side of the longitudinal slide rail 209. The longitudinal front part of the translation cylinder 210 is fixedly installed on the outer side of the longitudinal slide rail 209, and the longitudinal rear part of the translation cylinder 210 is fixedly connected to the continuous pipe feeding device 1. Under the drive of the translation cylinder 210, the continuous pipe feeding device 1 can move back and forth in the longitudinal direction within the longitudinal slide rail 209.

[0082] In this embodiment, the bottom of the lifting cylinder 208 is a cylinder rod and is connected to the connecting plate 203 of the horizontal rotary assembly via a pin. The top of the lifting cylinder 208 is a cylinder barrel and is fixedly connected to the connecting plate 205 of the vertical rotary assembly. The longitudinal front end of the translation cylinder 210 is the cylinder barrel end and is fixedly connected to the connecting plate 205 of the vertical rotary assembly. The longitudinal rear end of the translation cylinder 210 is the cylinder rod end and is fixedly connected to the pipe-adding device mounting bracket 101 of the continuous pipe-adding device 1. Two cylindrical tubes are fixedly installed on the left side of the longitudinal slide rail mounting plate 207, and the column 2... The vertical rotary assembly connecting plate 205 and the column 204 are coaxially installed inside the cylindrical tube, enabling movable installation of the vertical rotary assembly connecting plate 205 and the column 204. A connecting shaft is rotatably mounted within the bearing of the horizontal rotary reducer 202, and this connecting shaft connects to the connecting plate 203 on the horizontal rotary assembly. The horizontal rotary reducer 202 is used for azimuth angle adjustment. A main shaft is rotatably mounted within the bearing of the vertical rotary reducer 206, and this main shaft connects to the longitudinal slide rail mounting plate 207. The vertical rotary reducer 206 is used for main shaft tilt angle adjustment. This structural configuration enables the full-section function of the continuous pipe-feeding conveying system.

[0083] As one specific solution in this embodiment, such as Figure 10 and Figure 11As shown, a five-way valve 6 and a six-way valve 7 are installed on the left side of the vertical rotary assembly connecting plate 205, and a diversion valve assembly 8 and a hydraulic lock 9 are installed on the top of the vertical rotary assembly connecting plate 205. In this embodiment, the diversion valve assembly 8, the hydraulic lock 9, the five-way valve 6 and the six-way valve 7 together form the control mechanism of the continuous pipe feeding and conveying system, which can control the actions of each actuator of the continuous pipe feeding and conveying system, thereby realizing the function of continuous pipe feeding and conveying of screen tubes.

[0084] As one specific solution in this embodiment, such as Figure 12 and Figure 13 As shown, the inclined bar bin device 3 includes a bar bin 301 installed on the right side of the tube feeding device mounting frame 101. A screen tube outlet 302 is opened on the left side of the bar bin 301, facing the continuous tube feeding device 1. A rack mounting plate 303 is fixedly installed at the bottom of the bar bin 301, and a rack 304 is fixedly installed on the bottom surface of the rack mounting plate 303. A bar bin cycloidal motor 305 and a motor mounting box 306 are arranged below the bar bin 301. The right side of the rack 304 and the motor shaft of the bar bin cycloidal motor 305 both extend into the motor mounting box 306. A gear 307 is installed on the motor shaft of the bar bin cycloidal motor 305, and the gear 307 meshes with the rack 304. The motor mounting box 306 is fixedly connected to the bottom of the screen tube clamping frame 308, and the top of the screen tube clamping frame 308 is located inside the bar bin 301.

[0085] In this embodiment, the rod chamber 301 is used to store screen tubes, providing screen tubes for the continuous tube feeding and conveying system. As the screen tubes are lowered into the hole, the number of screen tubes in the rod chamber 301 continuously decreases, and the remaining screen tubes may become scattered, leading to screen tube feeding failure. The screen tube clamping frame 308 is fixedly connected to the motor mounting box 306 by bolts. When the number of screen tubes in the rod chamber 301 is small, the rod chamber cycloidal motor 305, gear 307, and rack 304 drive the motor mounting box 306 and the screen tube clamping frame 308 to move along the length direction of the rack 304, clamping and tidying up the remaining screen tubes in the rod chamber 301, ensuring that the remaining screen tubes are always arranged in an orderly manner and do not become scattered, thus improving the reliability of screen tube output from the rod chamber 301.

[0086] As one specific solution in this embodiment, such as Figure 12 As shown, a pull rod mounting component 309 is installed on each of the longitudinal sides of the rod magazine 301. A clamp body 310 is rotatably installed inside the pull rod mounting component 309. A pull rod mounting cavity is opened in the clamp body 310 along the axial direction. The top end of the pull rod 311 is installed in the pull rod mounting cavity, and the bottom end of the pull rod 311 is installed on the pipe-adding device mounting bracket 101.

[0087] In this embodiment, the tilt angle of the lever magazine 301 can be adjusted by adjusting the insertion length of the lever 311 within the chuck body 310.

[0088] As a specific solution in this embodiment, a bar chamber pressure sensor is used to detect the clamping pressure of the screen tube clamping frame 308 on the screen tube. When the screen tube in the bar chamber 301 is pressed into the continuous tube feeding device 1, the clamping pressure decreases. The bar chamber pressure sensor feeds back the signal to the controller, which controls the gear 307 and rack 304 to drive the screen tube clamping frame 308 to clamp the remaining screen tubes, so that the clamping pressure of the screen tube clamping frame 308 is always maintained at the set value. By real-time monitoring and adjustment of the clamping pressure, it is ensured that the remaining screen tubes in the bar chamber are always clamped and arranged in an orderly manner, thereby improving the reliability of the screen tube output.

[0089] As one specific solution in this embodiment, such as Figure 14 , Figure 16 and Figure 15 As shown, the conveying device 4 includes a conveying box 401. A conveying device screen tube inlet is opened on the longitudinal rear side of the conveying box 401, and a conveying device screen tube outlet 403 is opened on the longitudinal front side of the conveying box 401. A conveying cycloidal motor 402 is fixedly installed inside the top of the conveying box 401. The conveying cycloidal motor 402 is arranged in the transverse direction, and a sprocket 403 is rotatably mounted on the motor shaft of the conveying cycloidal motor 402. A pair of drive wheels 404 are rotatably installed inside the conveying box 401 below the conveying cycloidal motor 402. A chain is mounted on the central shaft of the drive wheels 404. The sprocket 403 is connected to the conveying cycloidal motor 402 via a chain; a limit wheel 405 is provided below the drive wheel 404, and the lateral sides of the drive wheel 404 and the limit wheel 405 are in close contact. The gap between the drive wheel 404 and the limit wheel 405 is the conveying channel 406, through which the screen tube can pass; the bottom ends of two pairs of return springs 407 are fixedly installed on the bottom surface of the conveying box 401, and the top ends of the return springs 407 are connected to the central axis of the limit wheel 405. A return cylinder 408 is provided above the central axis of the limit wheel 405.

[0090] In this embodiment, the conveying cycloidal motor 402 provides transmission power to the conveying device, driving the sprocket 403 to rotate. The sprocket 403 and the drive wheel 404 are connected by a chain drive, causing the drive wheel 404 to rotate. The shaft of the limiting wheel 405 is internally located. When the reset cylinder 408 and the reset spring 407 extend or retract, the limiting wheel 405 moves up and down. Normally, the reset spring 407 presses the limiting wheel 405 tightly against the drive wheel 404, preventing the screen tube between the drive wheel 404 and the limiting wheel 405 from suddenly sliding down and causing a safety accident. When the conveying device begins to lower the screen tube into the hole, the piston rod of the reset cylinder 408 extends, driving the limit wheel 405 to move downward and disengage from the drive wheel 404, ensuring that the screen tube can pass through the conveying channel 406 between the drive wheel 404 and the limit wheel 405. After the end of the screen tube extends out of the conveying channel 406, the piston rod of the reset cylinder 408 retracts, and the reset spring 407 presses the limit wheel 405 tightly against the surface of the screen tube. The conveying cycloidal motor 402 drives the drive wheel 404 to rotate, and under the action of friction, the screen tube is lowered into the hole.

[0091] As one specific solution in this embodiment, such as Figure 16 As shown, the clamping device 5 includes a clamping mounting frame 501, which is fixedly mounted on the longitudinal front side of the conveying box 401. A clamping cylinder 502 is fixedly mounted on each of the two transverse sides of the clamping mounting frame 501. The clamping cylinders 502 are arranged transversely, with the outer transverse end of the clamping cylinder 502 being the cylinder end and the inner transverse end of the clamping cylinder 502 being the cylinder rod end. A screen tube slot 503 is provided in the middle of the clamping mounting frame 501. The screen tube slot 503 is directly opposite the screen tube outlet of the conveying device 4. Slips 504 are provided on both transverse sides of the screen tube slot 503. The slips 504 are fixedly connected to the cylinder rod end of the clamping cylinder 502.

[0092] In this embodiment, the clamping surface on the inner side of the slip 504 is arc-shaped and has a spiral groove. When the screen tube comes out of the screen tube outlet of the conveying device 4, the clamping cylinder 502 drives the slip 504 to clamp the screen tube in the screen tube slot 503. The clamping device 5 can prevent the screen tube from slipping and causing injury through the above process, and can also assist in the insertion of the front and rear screen tubes.

[0093] Example 3:

[0094] This embodiment provides a control method for a continuous pipe feeding and conveying system for plug-in screen pipes used in coal mines, as described in Embodiment 2. Figure 17As shown, this control method integrates the continuous pipe-feeding control system into the auxiliary control system, using an explosion-proof and intrinsically safe controller for underground coal mines as the control center. The controller sends signals to the multi-way valves that control the continuous pipe-feeding system, enabling them to control the oil flow direction, on / off states, and other actions related to pipe feeding. Simultaneously, it can receive feedback signals from various types of sensors deployed on the continuous pipe-feeding system to achieve logic control. The specific working principle is as follows:

[0095] First, appropriate sensors need to be deployed in suitable locations to allow the controller to obtain the necessary feedback signals for logical judgment. In the continuous pipe feeding process, the rotation of the continuous pipe feeding device 1 and the operation of the conveying device 4 must be interlocked to prevent accidental simultaneous operation that could damage the device or create other safety hazards.

[0096] When the continuous tube feeding device 1 is activated, the ratchet and pawl assembly 105 first drives the rotating shaft 102, the rear indexing wheel 103, and the front indexing wheel 104 to rotate. During the rotation, the screen tube in the rod chamber is pressed into the screen tube loading slots on the rear indexing wheel 103 and the front indexing wheel 104. When the screen tube in the screen tube loading slot rotates to the set pushing position, the first sensor 109 detects a signal and feeds it back to the controller. The controller issues a stop operation command for the ratchet and pawl assembly 105, an extension command for the push rod assembly 106, and an operation command for the conveying device. The push rod assembly 106 is controlled to push the screen tube stopped at the pushing position until the screen tube enters the conveying device for conveying after the maximum stroke of the hydraulic cylinder. Then, the push rod assembly 106 retracts.

[0097] When the third sensor 111 detects the position of the female end of the screen tube in the centering assembly 108, the detection signal is fed back to the controller. The controller issues a clamping command for the clamping device, a stop command for the conveying device, and an action command for the ratchet and pawl assembly 105. The clamping device clamps the screen tube, the conveying device stops conveying, and the ratchet and pawl assembly 105 actuates to proceed to the next step of adding the tube. When the pushed screen tube and the screen tube in the hole are inserted into the centering assembly 108 of the continuous tube adding device, the second sensor 110 detects that the pushed screen tube has reached the insertion position and feeds back a signal to the controller. Further, if the insertion is secure and the insertion pressure reaches the set value, the insertion pressure sensor feeds back a signal to the controller. The controller issues an opening command for the clamping device and an action command for the conveying device. The inserted screen tube moves forward under the action of the conveying device and is lowered into the borehole.

[0098] The above control process avoids the simultaneous operation of the rotating action of the continuous pipe feeding device 1 and the action of the conveying device 4, preventing damage to the device or injury to personnel due to misoperation, and improving construction safety.

[0099] The working process of the continuous feeding and conveying system for plug-in screen pipes in coal mines of the present invention is as follows:

[0100] Step 1: Before starting the machine, put the bundled screen tubes into the inclined bar bin device 3 until the bar bin is full. At this time, the screen tubes are arranged in a relatively disorderly manner.

[0101] Step 2: After powering on, the bar bin cycloidal motor 305 of the inclined bar bin device 3 rotates, driving the rack 304 and gear 307 to drive the screen tube clamping frame 308 to clamp and align the screen tubes in the bar bin, so that the screen tubes on one side of the bar bin 301 are tightly against the rear indexing wheel 103 and the front indexing wheel 104. When the bar bin pressure sensor assembly detects that the clamping pressure of the screen tube clamping frame 308 on the screen tubes reaches the set value, the bar bin cycloidal motor 305 stops rotating, the pressure plate stops moving, and the screen tubes are arranged in an orderly manner.

[0102] Step 3: Start the ratchet and pawl assembly 105 to drive the rear indexing wheel 103 and the front indexing wheel 104 to rotate. During the rotation, the screen tube in the inclined bar bin device 3 is pressed into the screen tube loading groove, and the number of screen tubes in the bar bin 301 decreases. The rack 304 and gear 307 drive the screen tube clamping frame 308 to clamp and adjust the screen tube until the clamping pressure reaches the set value. At the same time, the ratchet and pawl assembly 105 continues to drive the rear indexing wheel 103 and the front indexing wheel 104 to rotate. When the first sensor 109 detects that the screen tube in the loading groove has rotated to the set push position, the ratchet and pawl assembly 105 stops moving.

[0103] Step 4: 1. The push rod assembly 106 pushes the screen tube at the push position into the conveying device 4. The conveying device 4 lowers the screen tube into the borehole. When the female end of the screen tube in the borehole enters the centering assembly 108, the third sensor 111 detects that it has reached the insertion position. The clamping device 5 clamps the screen tube in the borehole, and the conveying device 4 stops operating.

[0104] Step 5, repeat step 3;

[0105] Step six: The push rod assembly 106 pushes the screen tube at the pushing position into the centering assembly 108. When the second sensor 110 detects that the pushed screen tube has reached the insertion position, the push rod assembly 106 continues to push, and the pushed screen tube is inserted into the screen tube in the hole. When the insertion pressure reaches the set value, the insertion pressure sensor detects the signal, the clamping device 5 opens, and the conveying device 4 is activated to lower the inserted screen tube into the borehole.

[0106] Step 7: When the inserted screen tube female head enters the centering assembly 108, the third sensor 111 detects that it has reached the insertion position, the clamping device clamps the screen tube in the hole, and the conveying device stops operating.

[0107] Step 8: Repeat steps 5 through 7 until the screen tube is lowered to the bottom of the borehole.

Claims

1. A continuous feeding and conveying system for plug-in screen pipes used in coal mines, characterized in that, It includes a continuous pipe feeding device (1); the left side of the continuous pipe feeding device (1) is mounted on the luffing device (2), the right side of the continuous pipe feeding device (1) is equipped with a ramp-type bar holder device (3), the front side of the continuous pipe feeding device (1) is equipped with the rear side of the conveying device (4), and the front side of the conveying device (4) is equipped with a clamping device (5). The continuous tube feeding device (1) includes a tube feeding device mounting frame (101). A ramp-type bar bin device (3) is installed on the right side of the tube feeding device mounting frame (101). The right side of the tube feeding device mounting frame (101) is open and serves as the screen tube inlet, with the screen tube inlet facing the ramp-type bar bin device (3). A rotating shaft (102) is rotatably mounted on the pipe-adding device mounting bracket (101), and the rotating shaft (102) is arranged along the longitudinal direction; a rear indexing wheel (103) is fixedly mounted on the axial rear part of the rotating shaft (102), and a front indexing wheel (104) is fixedly mounted on the axial front part of the rotating shaft (102); a ratchet and pawl assembly (105) is mounted on the longitudinal rear side of the pipe-adding device mounting bracket (101), and the ratchet and pawl assembly (105) is located longitudinally behind the rear indexing wheel (103); the pipe-adding device mounting bracket (101) is rotatably mounted on the rotating shaft (102), and the rotating shaft (102) is arranged along the longitudinal direction; the rotating shaft (102 ... A top rod assembly (106) is installed inside the longitudinal rear side of the mounting bracket (101), and a straightening assembly (107) is installed on the longitudinal rear side of the pipe-adding device mounting bracket (101). The bottom of the top rod assembly (106) is located below the rear indexing wheel (103), and the top of the top rod assembly (106) passes through the straightening assembly (107) and the rear indexing wheel (103) from back to front. A centering assembly (108) is installed outside the longitudinal front side of the pipe-adding device mounting bracket (101), and the centering assembly (108) is located in the longitudinal front of the front indexing wheel (104). The conveying device (4) includes a conveying box (401), with a conveying device screen tube inlet on the longitudinal rear side and a conveying device screen tube outlet on the longitudinal front side; a conveying cycloidal motor (402) is fixedly installed inside the top of the conveying box (401), the conveying cycloidal motor (402) is arranged in the transverse direction, and a sprocket (403) is rotatably installed on the motor shaft of the conveying cycloidal motor (402); a pair of drive wheels (404) are rotatably installed inside the conveying box (401) below the conveying cycloidal motor (402), and a sprocket (403) is installed on the central shaft of the drive wheels (404). The sprocket (403) is connected to the conveying cycloidal motor (402) via a chain; a limit wheel (405) is provided below the drive wheel (404), the drive wheel (404) and the limit wheel (405) are in close contact on the lateral sides, and the gap between the drive wheel (404) and the limit wheel (405) is the conveying channel (406), through which the screen tube can pass; the bottom ends of two pairs of return springs (407) are fixedly installed on the bottom surface of the conveying box (401), the top ends of the return springs (407) are connected to the central axis of the limit wheel (405), and a return cylinder (408) is provided above the central axis of the limit wheel (405).

2. The continuous feeding and conveying system for plug-in screen pipes used in coal mines as described in claim 1, characterized in that, The ratchet and pawl assembly (105) includes a rocker arm cylinder (10501) located on the right side of the rear indexing wheel (103). One end of the rocker arm cylinder (10501) is rotatably mounted on the longitudinal rear of the pipe-adding device mounting bracket (101). The other end of the rocker arm cylinder (10501) is rotatably mounted with one end of a rocker arm (10502), and the other end of the rocker arm (10502) is rotatably mounted on a rotating shaft (102). One end of the rocker arm (10502) is rotatably mounted with an active pawl (10503). The other end of 03) is engaged with the ratchet (10504), which is fixedly mounted on the rotating shaft (102) and located on the longitudinal rear side of the rear indexing wheel (103); a check pawl (10505) is mounted on the axial rear end of the pipe-adding device mounting bracket (101), which is located to the lower right of the active pawl (10503). One end of the check pawl (10505) is rotatably mounted on the pipe-adding device mounting bracket (101), and the other end of the check pawl (10505) is engaged with the ratchet (10504).

3. The continuous feeding and conveying system for plug-in screen pipes used in coal mines as described in claim 2, characterized in that, The push rod assembly (106) includes a push rod cylinder mounting component (10601) fixedly mounted on the pipe-adding device mounting bracket (101). A push rod cylinder (10602) is fixedly mounted inside the push rod cylinder mounting component (10601). The push rod cylinder (10602) is located below the rear indexing wheel (103). A push rod connecting bracket (10603) is fixedly connected to the piston rod of the push rod cylinder (10602). The push rod connecting bracket (10603) is set upward in the vertical direction. The longitudinal rear end of the push rod (10604) is integrally connected to the top of the push rod connecting bracket (10603). A push rod protrusion (10605) is integrally provided on the longitudinal front end of the push rod (10604). The push rod protrusion (10605) passes through the indexing wheel loading groove of the straightening component (107) and the rear indexing wheel (103) from back to front.

4. The continuous feeding and conveying system for plug-in screen pipes used in coal mines as described in claim 2, characterized in that, The correction assembly (107) includes a correction connecting frame (10701) fixedly installed on the longitudinal rear side of the tube-adding device mounting frame (101). A left liner (10702), a clamping plate (10703), and a right liner (10704) are fixedly installed on the right side of the correction connecting frame (10701) from left to right. The space enclosed by the left liner (10702), the clamping plate (10703), and the right liner (10704) is a correction groove (10705). The top rod protrusion (10605) can pass through the correction groove (10705).

5. The continuous feeding and conveying system for plug-in screen pipes used in coal mines as described in claim 2, characterized in that, The centering assembly (108) includes a centering mounting bracket (10801) fixedly mounted on the pipe-adding device mounting bracket (101). An upper centering body (10802) is fixedly mounted on the top of the centering mounting bracket (10801). A lower centering body (10803) is provided below the upper centering body (10802). The upper centering body (10802) and the lower centering body (10803) are connected by multiple springs. The space enclosed by the lower centering body (10803) and the upper centering body (10802) is the screen pipe centering cavity (10804). A centering cylinder (10805) is fixedly mounted on the bottom of the centering mounting bracket (10801). The centering cylinder (10805) is located below the lower centering body (10803). The piston rod of the centering cylinder (10805) is connected to the lower centering body (10803).

6. The continuous feeding and conveying system for plug-in screen pipes used in coal mines as described in claim 1, characterized in that, The variable amplitude device (2) includes a lower base plate (201) of a horizontal slewing assembly. A horizontal slewing reducer (202) is fixedly installed on the lower base plate (201). The horizontal slewing reducer (202) is connected to the upper connecting plate (203) of the horizontal slewing assembly. Under the drive of the horizontal slewing reducer (202), the upper connecting plate (203) of the horizontal slewing assembly can rotate on the horizontal plane. A pair of columns (204) are fixedly installed on the upper connecting plate (203) of the horizontal rotary assembly. A vertical rotary assembly connecting plate (205) is movably installed on the pair of columns (204). A vertical surface rotary reducer (206) is installed on the right side of the vertical rotary assembly connecting plate (205). The vertical surface rotary reducer (206) is connected to the longitudinal slide rail mounting plate (207). Under the drive of the vertical surface rotary reducer (206), the longitudinal slide rail mounting plate (207) can rotate in the vertical plane. A lifting cylinder (208) is provided between the pair of columns (204) along the vertical direction. The bottom of the lifting cylinder (208) is connected to the connecting plate (203) on the horizontal rotary assembly, and the top of the lifting cylinder (208) is fixedly connected to the left side of the connecting plate (205) of the vertical rotary assembly. Under the drive of the lifting cylinder (208), the longitudinal slide rail mounting plate (207) can move up and down along the column (204). A longitudinal slide rail (209) is fixedly installed on the top and bottom of the longitudinal slide rail mounting plate (207). A translation cylinder (210) is provided on the outer side of the longitudinal slide rail (209). The longitudinal front part of the translation cylinder (210) is fixedly installed on the outer side of the longitudinal slide rail (209), and the longitudinal rear part of the translation cylinder (210) is fixedly connected to the continuous pipe feeding device (1). Under the drive of the translation cylinder (210), the continuous pipe feeding device (1) can move back and forth in the longitudinal direction within the longitudinal slide rail (209).

7. The continuous pipe feeding and conveying system for plug-in screen pipes used in coal mines as described in claim 1, characterized in that, The inclined bar bin device (3) includes a bar bin (301) installed on the right side of the tube feeding device mounting frame (101). A screen tube outlet (302) is provided on the left side of the bar bin (301), and the screen tube outlet (302) faces the continuous tube feeding device (1). A rack mounting plate (303) is fixedly installed at the bottom end of the bar bin (301), and a rack (304) is fixedly installed on the bottom surface of the rack mounting plate (303). A bar bin cycloidal line is provided below the bar bin (301). The motor (305) and motor mounting box (306), the right lateral end of the rack (304) and the motor shaft of the bar bin cycloidal motor (305) all extend into the motor mounting box (306). A gear (307) is installed on the motor shaft of the bar bin cycloidal motor (305), and the gear (307) meshes with the rack (304). The motor mounting box (306) is fixedly connected to the bottom of the screen tube clamping frame (308), and the top of the screen tube clamping frame (308) is located inside the bar bin (301).

8. The continuous feeding and conveying system for plug-in screen pipes used in coal mines as described in claim 7, characterized in that, A pull rod mounting component (309) is installed on each of the longitudinal sides of the rod magazine (301). A clamp body (310) is rotatably installed inside the pull rod mounting component (309). A pull rod mounting cavity is opened in the clamp body (310) along the axial direction. The top end of the pull rod (311) is installed in the pull rod mounting cavity. The bottom end of the pull rod (311) is installed on the pipe-adding device mounting frame (101).

9. The continuous feeding and conveying system for plug-in screen pipes in coal mines as described in claim 1, characterized in that, The clamping device (5) includes a clamping mounting frame (501), which is fixedly mounted on the longitudinal front side of the conveying box (401). A clamping cylinder (502) is fixedly mounted on each of the two transverse sides of the clamping mounting frame (501). The clamping cylinder (502) is arranged transversely, with the outer transverse end of the clamping cylinder (502) being the cylinder end and the inner transverse end of the clamping cylinder (502) being the cylinder rod end. A screen tube slot (503) is provided in the middle of the clamping mounting frame (501). The screen tube slot (503) is directly opposite the screen tube outlet of the conveying device (4). Slips (504) are provided on both transverse sides of the screen tube slot (503). The slips (504) are fixedly connected to the cylinder rod end of the clamping cylinder (502).

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