A continuous pipe adding device for a plug-in type screen pipe used in a coal mine

Abstract

The application provides a continuous pipe adding device for a plug-in screen pipe for coal mines, which comprises a pipe adding device mounting rack, a rotating shaft rotatably mounted on the pipe adding device mounting rack, a front indexing wheel fixedly mounted on the front part of the rotating shaft in the axial direction, and a rear indexing wheel fixedly mounted on the rear part of the rotating shaft in the axial direction; a ratchet pawl assembly, a top rod assembly and a correction assembly are mounted on the longitudinal rear part of the pipe adding device mounting rack, the ratchet pawl assembly is located on the right side of the rear indexing wheel in the transverse direction, the top rod assembly is located below the rear indexing wheel, and the correction assembly is located on the rear side of the rear indexing wheel in the longitudinal direction. The application is suitable for the screen pipe lowering construction of the gas extraction drilling in the coal mine, and 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 without manual intervention in the screen pipe adding and lowering process.

Description

Technical Field

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

[0002] my country has a large number of coal mines with gas outbursts and high-gas conditions. The most effective way to prevent excessive gas levels in coal mining is to drill gas drainage boreholes to pre-drain the gas. However, after the completion of these boreholes, the high gas pressure and geological conditions can easily cause them to collapse, blocking the gas drainage channels and affecting the gas drainage effect, which in turn affects the safe production of coal mines.

[0003] Screen pipes effectively prevent borehole collapse. After borehole completion, the drill string is removed, and the screen pipe is lowered to the bottom of the borehole to ensure unobstructed gas extraction channels. Screen pipes are mainly connected by threaded or plug-in connections. The screen pipe body has mesh openings to facilitate gas accumulation from the coal seam into the gas extraction channels. Threaded screen pipes offer high connection strength, while plug-in screen pipes have a simple structure and are easy to connect. However, both types of screen pipe lowering rely heavily on manual labor, with each pipe connected individually before manual or mechanical lowering. This is labor-intensive. Furthermore, when lowering screen pipes at large angles, slippage can easily occur, leading to personal injury accidents. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a continuous pipe feeding device for plug-in screen pipes in coal mines, which solves the technical problem that the screen pipe lowering process in the existing technology 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 device for plug-in screen pipes used in coal mines includes a pipe-feeding device mounting frame. A rotating shaft is rotatably mounted on the mounting frame, and the rotating shaft 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 mounting frame, and the ratchet and pawl assembly is located longitudinally rear of the rear indexing wheel. A push rod assembly is mounted inside the longitudinal rear side of the mounting frame, and a straightening assembly is mounted on the longitudinal rear side of the mounting frame. 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.

[0007] 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.

[0008] The present invention also has the following technical features.

[0009] An active pawl mounting block is fixedly installed on the swing arm, and one end of the active pawl is connected to the active pawl mounting block; one end of the active pawl limiting spring is fixedly installed on the active pawl mounting block, and the other end of the active pawl limiting spring is fixedly connected to the active pawl.

[0010] A check pawl mounting block is fixedly installed on the axial rear end of the pipe-adding device mounting bracket. One end of the check pawl is connected to the check pawl mounting block. One end of the check pawl limiting spring is fixedly installed on the check pawl mounting block, and the other end of the check pawl limiting spring is fixedly connected to the check pawl.

[0011] The rear indexing wheel includes an indexing wheel body, with a rotating shaft mounting hole at the center of the indexing wheel body, and a rotating shaft fixedly installed in the rotating shaft mounting hole; multiple indexing wheel loading slots are provided on the edge of the indexing wheel body, and the multiple indexing wheel loading slots are arranged along the circumferential direction of the indexing wheel body, and the indexing wheel loading slots are used to load screen tubes; the indexing wheel loading slots include large screen tube loading slots and small screen tube loading slots; the front indexing wheel and the rear indexing wheel have the same structure, and the indexing wheel loading slots of the front indexing wheel and the rear indexing wheel are set one-to-one.

[0012] 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.

[0013] 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.

[0014] The mounting bracket for the tube-adding device has bearing seats fixedly installed at both the axial front end and the axial rear end. Bearings are fixedly installed in the bearing seats, and rotating shafts are installed in the bearings.

[0015] A first proximity switch is fixedly installed on the right side of the mounting bracket for the pipe-adding device. The first proximity switch is located longitudinally behind the rear indexing wheel. A second proximity switch is fixedly installed on the left side of the mounting bracket for the pipe-adding device. The second proximity switch is located longitudinally in front of the top rod assembly.

[0016] A first proximity switch connecting plate is fixedly installed on the right side of the mounting bracket for the pipe-adding device. A first proximity switch protective cover is fixedly installed on the first proximity switch connecting plate, and a first proximity switch is fixedly installed inside the first proximity switch protective cover.

[0017] The second proximity switch connecting plate is fixedly installed on the left side of the mounting bracket for the pipe-adding device. The second proximity switch protective cover is fixedly installed on the second proximity switch connecting plate, and the second proximity switch is fixedly installed inside the second proximity switch protective cover.

[0018] Compared with the prior art, the present invention has the following technical effects.

[0019] (I) The continuous pipe feeding device for plug-in screen pipes in coal mines of the present invention realizes the placement of screen pipes by opening indexing wheel loading grooves 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.

[0020] 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.

[0021] (II) The continuous pipe loading device for plug-in screen pipes in coal mines of the present invention, by setting up large screen pipe loading slots and small screen pipe loading slots of different sizes, enables continuous pipe loading of various screen pipes of different specifications without replacing parts during the process of lowering screen pipes in gas drainage boreholes, thereby further reducing the labor intensity of workers.

[0022] (III) The continuous pipe-adding device for plug-in screen pipes in coal mines of the present invention detects and feeds back signals through a first proximity switch and a second proximity switch, thereby realizing the determination of the pipe-adding position and completion status. This setting is simple and reliable, and is conducive to realizing the automation of drilling and protection holes. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of a continuous tube feeding device for plug-in screen tubes used in coal mines.

[0024] Figure 2 A schematic diagram of the overall structure of a continuous pipe feeding device for plug-in screen pipes used in coal mines (and...) Figure 1 Different perspectives.

[0025] Figure 3 This is a side view of a continuous pipe-feeding device for plug-in screen pipes used in coal mines.

[0026] Figure 4 This is a rear view of a continuous pipe-feeding device for plug-in screen pipes used in coal mines.

[0027] Figure 5 This is a schematic diagram of the ratchet and pawl assembly.

[0028] Figure 6 This is a schematic diagram of the rear indexing wheel and the front indexing wheel.

[0029] Figure 7 This is a schematic diagram of the push rod assembly.

[0030] Figure 8 This is a schematic diagram of the corrective component.

[0031] Figure 9 This is a schematic diagram of the first proximity switch and its mounting structure.

[0032] Figure 10 This is a schematic diagram of the second proximity switch and its mounting structure.

[0033] The meanings of the labels in the figure are as follows: 1-Pipe mounting bracket, 2-Rotating shaft, 3-Rear indexing wheel, 4-Front indexing wheel, 5-Ratchet and pawl assembly, 6-Push rod assembly, 7-Correcting assembly, 8-Bearing seat, 9-First proximity switch, 10-Second proximity switch, 11-First proximity switch connecting plate, 12-First proximity switch protective cover, 13-Second proximity switch connecting plate, 14-Second proximity switch protective cover.

[0034] 301-Indexing wheel body, 302-Rotating shaft mounting hole, 303-Large screen tube loading slot, 304-Small screen tube loading slot.

[0035] 501-Swing arm cylinder, 502-Swing arm, 503-Active pawl, 504-Ratchet, 505-Check pawl, 506-Active pawl mounting block, 507-Active pawl limit spring, 508-Check pawl mounting block, 509-Check pawl limit spring.

[0036] 601-Pushrod cylinder mounting part, 602-Pushrod cylinder, 603-Pushrod connecting bracket, 604-Pushrod, 605-Pushrod protrusion.

[0037] 701-Correcting connecting frame, 702-Left liner, 703-Clamping plate, 704-Right liner, 705-Correcting slide.

[0038] The specific content of the present invention will be further explained and described in detail below with reference to the embodiments. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, all components in this invention are known in the art. For example, the rocker arm cylinder 501 and the push rod cylinder 602 are both conventional cylinders known in the prior art. The first proximity switch 9 and the second proximity switch 10 are both conventional proximity switches known in the prior art.

[0040] 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.

[0041] Example 1:

[0042] This embodiment provides a continuous tube feeding device suitable for multi-specification plug-in screen tubes used in coal mines, such as... Figures 1 to 4 As shown, the device includes a pipe-adding device mounting bracket 1, on which a rotating shaft 2 is rotatably mounted, the rotating shaft 2 being arranged along the longitudinal direction; a rear indexing wheel 3 is fixedly mounted on the axial rear part of the rotating shaft 2, and a front indexing wheel 4 is fixedly mounted on the axial front part of the rotating shaft 2; a ratchet and pawl assembly 5 is mounted on the longitudinal rear side of the pipe-adding device mounting bracket 1, the ratchet and pawl assembly 5 being located longitudinally rear of the rear indexing wheel 3; a push rod assembly 6 is mounted inside the longitudinal rear side of the pipe-adding device mounting bracket 1, and a straightening assembly 7 is mounted on the longitudinal rear side of the pipe-adding device mounting bracket 1, the bottom of the push rod assembly 6 being located below the rear indexing wheel 3, and the top of the push rod assembly 6 passing through the straightening assembly 7 and the rear indexing wheel 3 sequentially from back to front.

[0043] like Figure 4 and Figure 5As shown, the ratchet and pawl assembly 5 includes a rocker arm cylinder 501 located on the right side of the rear indexing wheel 3. One end of the rocker arm cylinder 501 is rotatably mounted on the longitudinal rear part of the pipe-adding device mounting bracket 1, and the other end of the rocker arm cylinder 501 is rotatably mounted on one end of a rocker arm 502. The other end of the rocker arm 502 is rotatably mounted on the rotating shaft 2. One end of the active pawl 503 is rotatably mounted on the rocker arm 502. The other end of the active pawl 503 meshes with a ratchet 504. The ratchet 504 is fixedly mounted on the rotating shaft 2 and located on the longitudinal rear side of the rear indexing wheel 3. A check pawl 505 is mounted on the axial rear end of the pipe-adding device mounting bracket 1. The check pawl 505 is located to the lower right of the active pawl 503. One end of the check pawl 505 is rotatably mounted on the pipe-adding device mounting bracket 1, and the other end of the check pawl 505 meshes with the ratchet 504.

[0044] In this embodiment, the cylinder of the rocker arm cylinder 501 is rotatably connected to the pipe-adding device mounting bracket 1 via a pin, the piston rod of the rocker arm cylinder 501 is rotatably connected to the rocker arm 502 via a pin, the active pawl 503 is rotatably connected to the rocker arm 502 via a pin, and the ratchet 504 is coaxial with the rotating shaft 2 and connected via a key. Under the action of the rocker arm cylinder 501, the active pawl 503 drives the ratchet 504 to rotate intermittently at a certain angle. The rear indexing wheel 3, the front indexing wheel 4, and the ratchet and pawl assembly 5 are all connected to the rotating shaft 2 via a key. The ratchet and pawl assembly 5 drives the rotating shaft 2 to rotate, thereby driving the rear indexing wheel 3 and the front indexing wheel 4 to rotate. Through the above process, the ratchet and pawl assembly 5 realizes the indexing and continuous rotation pipe-adding functions of the continuous pipe-adding device.

[0045] In this embodiment, when the active pawl 503 stops moving, the ratchet 504 is prone to reverse rotation under the gravity of the screen tube. The check pawl 505 can brake the ratchet 504 after the active pawl 503 stops moving, thereby avoiding the above-mentioned ratchet 504 reverse rotation phenomenon.

[0046] As one specific solution in this embodiment, such as Figure 5 As shown, an active pawl mounting block 506 is fixedly mounted on the rocker arm 502, and one end of the active pawl 503 is connected to the active pawl mounting block 506. One end of the active pawl limiting spring 507 is fixedly mounted on the active pawl mounting block 506, and the other end of the active pawl limiting spring 507 is fixedly connected to the active pawl 503. In this embodiment, under the action of the active pawl limiting spring 507, the tooth surface of the active pawl 503 is in close contact with the tooth surface of the ratchet 504 to ensure that the active pawl 503 stably drives the ratchet 504 to rotate.

[0047] As one specific solution in this embodiment, such as Figure 5As shown, a check pawl mounting block 508 is fixedly mounted on the axial rear end of the pipe-adding device mounting bracket 1. One end of the check pawl 505 is connected to the check pawl mounting block 508. One end of the check pawl limiting spring 509 is fixedly mounted on the check pawl mounting block 508, and the other end of the check pawl limiting spring 509 is fixedly connected to the check pawl 505. In this embodiment, under the action of the check pawl limiting spring 509, the tooth surface of the check pawl 505 is in close contact with the tooth surface of the ratchet 504 to ensure that the check pawl 505 can stably brake the ratchet 504.

[0048] As one specific solution in this embodiment, such as Figure 6 As shown, the rear indexing wheel 3 includes an indexing wheel body 301, with a rotating shaft mounting hole 302 at the center of the indexing wheel body 301, and a rotating shaft 2 fixedly installed in the rotating shaft mounting hole 302; multiple indexing wheel loading slots are provided on the edge of the indexing wheel body 301, and the multiple indexing wheel loading slots are arranged along the circumferential direction of the indexing wheel body 301, and the indexing wheel loading slots are used to load screen tubes; the indexing wheel loading slots include a large screen tube loading slot 303 and a small screen tube loading slot 304; the front indexing wheel 4 and the rear indexing wheel 3 have the same structure, and the indexing wheel loading slots of the front indexing wheel 4 and the rear indexing wheel 3 are arranged one-to-one.

[0049] In this embodiment, the large screen tube loading groove 303 and the small screen tube loading groove 304 are evenly spaced along the circumference, so that the screen tubes can be evenly placed on the rear indexing wheel 3 and the front indexing wheel 4 at a certain angle; wherein, the small screen tube loading groove 304 is suitable for loading screen tubes with an outer diameter of 25mm and 32mm, and the large screen tube loading groove 303 is suitable for loading screen tubes with an outer diameter of 40mm, 50mm and 63mm.

[0050] As one specific solution in this embodiment, such as Figure 7 As shown, the push rod assembly 6 includes a push rod cylinder mounting component 601 fixedly mounted on the pipe-adding device mounting bracket 1. A push rod cylinder 602 is fixedly mounted inside the push rod cylinder mounting component 601. The push rod cylinder 602 is located below the rear indexing wheel 3. A push rod connecting bracket 603 is fixedly connected to the piston rod of the push rod cylinder 602. The push rod connecting bracket 603 is set upward in the vertical direction. The longitudinal rear end of the push rod 604 is integrally connected to the top of the push rod connecting bracket 603. A push rod protrusion 605 is integrally provided on the longitudinal front end of the push rod 604. The push rod protrusion 605 passes through the straightening assembly 7 and the indexing wheel loading groove of the rear indexing wheel 3 from back to front.

[0051] In this embodiment, the push rod tip 605 is a conical boss structure, which can coaxially position the screen tube during the pushing process. The push rod cylinder 602 drives the push rod connecting frame 603 and the push rod 604 to drive the push rod tip 605 to push the screen tube to the predetermined position. After the push rod assembly 6 pushes the screen tube out of the predetermined position in the tube feeding device, the screen tube enters the next process.

[0052] As one specific solution in this embodiment, such as Figure 8 As shown, the correction assembly 7 includes a correction connecting frame 701 fixedly installed on the longitudinal rear side of the tube-adding device mounting frame 1. A left liner 702, a clamping plate 703, and a right liner 704 are fixedly installed on the transverse right side of the correction connecting frame 701 from left to right. The space enclosed by the left liner 702, the clamping plate 703, and the right liner 704 is a correction groove 705. The top rod protrusion 605 can pass through the correction groove 705.

[0053] In this embodiment, the straightening chute 705 has a U-shaped structure. During the process of pushing the screen tube, the push rod 604 and the push rod tip 605 move along the longitudinal direction in the straightening chute 705, and the straightening chute 705 plays a guiding role for the push rod assembly 6.

[0054] As one specific solution in this embodiment, such as Figure 1 and Figure 3 As shown, bearing seats 8 are fixedly installed in the axial front end and axial rear end of the pipe-adding device mounting bracket 1. Bearings are fixedly installed in the bearing seats 8, and rotating shafts 2 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 rotates. The rotating shaft 2 is rotatably installed through the bearing seats 8 and the bearings.

[0055] As one specific solution in this embodiment, such as Figure 1 and Figure 3 As shown, a first proximity switch 9 is fixedly installed on the right side of the pipe-adding device mounting bracket 1. The first proximity switch 9 is located longitudinally behind the rear indexing wheel 3. A second proximity switch 10 is fixedly installed on the left side of the pipe-adding device mounting bracket 1. The second proximity switch 10 is located longitudinally in front of the top rod assembly 6.

[0056] In this embodiment, the first proximity switch 9 is used to detect whether the screen tube in the tube feeding device has reached the predetermined position. After detecting the screen tube, it feeds back the signal to the controller to control the push rod assembly 6 to move. The second proximity switch 10 is used to detect whether the push rod assembly 6 pushes the screen tube at the predetermined position out of the tube feeding device. After detecting that the screen tube has been pushed out of the tube feeding device, it feeds back the signal to the controller to control the ratchet and pawl assembly 5 to move and perform the next tube feeding.

[0057] As one specific solution in this embodiment, such as Figure 9As shown, a first proximity switch connecting plate 11 is fixedly installed on the right side of the pipe-adding device mounting bracket 1. A first proximity switch protective cover 12 is fixedly installed on the first proximity switch connecting plate 11, and a first proximity switch 9 is fixedly installed inside the first proximity switch protective cover 12. In this embodiment, the first proximity switch protective cover 12 is used to protect the first proximity switch 9.

[0058] As one specific solution in this embodiment, such as Figure 10 As shown, a second proximity switch connecting plate 13 is fixedly installed on the left side of the pipe-adding device mounting bracket 1. A second proximity switch protective cover 14 is fixedly installed on the second proximity switch connecting plate 13, and a second proximity switch 10 is fixedly installed inside the second proximity switch protective cover 14. In this embodiment, the second proximity switch protective cover 14 is used to protect the second proximity switch 10.

[0059] The working process of this invention is as follows: Step 1: Load the screen tube onto the indexing wheel loading slots of the rear indexing wheel 3 and the front indexing wheel 4.

[0060] Step 2: Move the push rod tip 605 to its initial position, which is located longitudinally behind the rear indexing wheel 3.

[0061] Step 3: Start the rocker arm cylinder 501. The piston rod of the rocker arm cylinder 501 begins to reciprocate and drives the rocker arm 502 to move in a circle around the rotating shaft 2. When the rocker arm 502 moves counterclockwise, the active pawl 503 will push the ratchet 504 to rotate counterclockwise. The ratchet 504 drives the rotating shaft 2 to rotate synchronously. The rear indexing wheel 3 and the front indexing wheel 4, which are fixedly installed on the rotating shaft 2, will also rotate synchronously.

[0062] Step four: The first proximity switch 9 is used to detect the position of the screen tube. After the screen tube reaches the preset position, the first proximity switch 9 sends a signal and feeds it back to the controller. The controller issues a command to close the swing arm cylinder 501, so that the rear indexing wheel 3 and the front indexing wheel 4 stop rotating.

[0063] Step 5: Start the push rod cylinder 602, so that the push rod tip 605 moves along the longitudinal direction in the straightening groove 705. During the movement, the push rod tip 605 coaxially positions the screen tube and pushes the screen tube forward longitudinally.

[0064] Step six: The second proximity switch 10 is used to start detecting the position of the screen tube. After the screen tube is pushed out of the tube feeding device, the second proximity switch 10 sends a signal and feeds back to the controller. The controller issues a command to close the push rod cylinder 602, and the push rod tip 605 stops moving.

[0065] Step 7: Repeat steps 2 through 6 until all the screen tubes in the tube chamber have been added.

Claims

1. A continuous pipe-feeding device for plug-in screen pipes used in coal mines, characterized in that, The device includes a pipe-adding device mounting bracket (1), on which a rotating shaft (2) is rotatably mounted, the rotating shaft (2) being arranged along the longitudinal direction; a rear indexing wheel (3) is fixedly mounted on the axial rear part of the rotating shaft (2), and a front indexing wheel (4) is fixedly mounted on the axial front part of the rotating shaft (2); a ratchet and pawl assembly (5) is mounted on the longitudinal rear side of the pipe-adding device mounting bracket (1), the ratchet and pawl assembly (5) being located longitudinally rear of the rear indexing wheel (3); a push rod assembly (6) is mounted inside the longitudinal rear side of the pipe-adding device mounting bracket (1), and a straightening assembly (7) is mounted on the longitudinal rear side of the pipe-adding device mounting bracket (1), the bottom of the push rod assembly (6) being located below the rear indexing wheel (3), and the top of the push rod assembly (6) passing through the straightening assembly (7) and the rear indexing wheel (3) sequentially from back to front; The rear indexing wheel (3) includes an indexing wheel body (301), and a rotating shaft mounting hole (302) is provided at the center of the indexing wheel body (301). A rotating shaft (2) is fixedly installed in the rotating shaft mounting hole (302). Multiple indexing wheel loading slots are provided on the edge of the indexing wheel body (301). The multiple indexing wheel loading slots are arranged along the circumferential direction of the indexing wheel body (301). The indexing wheel loading slots are used to load screen tubes. The indexing wheel loading slots include a large screen tube loading slot (303) and a small screen tube loading slot (304). The front indexing wheel (4) and the rear indexing wheel (3) have the same structure. The indexing wheel loading slots of the front indexing wheel (4) and the rear indexing wheel (3) are arranged one-to-one. The ratchet and pawl assembly (5) includes a rocker arm cylinder (501) located on the right side of the rear indexing wheel (3). One end of the rocker arm cylinder (501) is rotatably mounted on the longitudinal rear of the pipe-adding device mounting bracket (1), and the other end of the rocker arm cylinder (501) is rotatably mounted on one end of a rocker arm (502). The other end of the rocker arm (502) is rotatably mounted on a rotating shaft (2). One end of the rocker arm (502) is rotatably mounted on the rocker arm (502), and the active pawl (503) is rotatably mounted on the rocker arm (502). The other end of the ratchet (504) is engaged with the ratchet (504), which is fixedly installed on the rotating shaft (2) and located on the longitudinal rear side of the rear indexing wheel (3); a check pawl (505) is installed on the axial rear end of the tube-adding device mounting bracket (1), the check pawl (505) is located to the right and below the active pawl (503), one end of the check pawl (505) is rotatably installed on the tube-adding device mounting bracket (1), and the other end of the check pawl (505) is engaged with the ratchet (504).

2. The continuous pipe feeding device for plug-in screen pipes in coal mines as described in claim 1, characterized in that, An active pawl mounting block (506) is fixedly installed on the swing arm (502), and one end of the active pawl (503) is connected to the active pawl mounting block (506); one end of the active pawl limiting spring (507) is fixedly installed on the active pawl mounting block (506), and the other end of the active pawl limiting spring (507) is fixedly connected to the active pawl (503).

3. The continuous pipe feeding device for plug-in screen pipes in coal mines as described in claim 1, characterized in that, A check pawl mounting block (508) is fixedly installed on the axial rear end of the pipe-adding device mounting bracket (1). One end of the check pawl (505) is connected to the check pawl mounting block (508). One end of the check pawl limiting spring (509) is fixedly installed on the check pawl mounting block (508), and the other end of the check pawl limiting spring (509) is fixedly connected to the check pawl (505).

4. The continuous pipe feeding device for plug-in screen pipes in coal mines as described in claim 1, characterized in that, The push rod assembly (6) includes a push rod cylinder mounting component (601) fixedly mounted on the pipe-adding device mounting bracket (1). A push rod cylinder (602) is fixedly installed inside the push rod cylinder mounting component (601). The push rod cylinder (602) is located below the rear indexing wheel (3). A push rod connecting bracket (603) is fixedly connected to the piston rod of the push rod cylinder (602). The push rod connecting bracket (603) is set upward in the vertical direction. The longitudinal rear end of the push rod (604) is integrally connected to the top of the push rod connecting bracket (603). A push rod protrusion (605) is integrally provided on the longitudinal front end of the push rod (604). The push rod protrusion (605) passes through the indexing wheel loading groove of the straightening component (7) and the rear indexing wheel (3) from back to front.

5. The continuous pipe feeding device for plug-in screen pipes in coal mines as described in claim 4, characterized in that, The correction component (7) includes a correction connecting frame (701) fixedly installed on the longitudinal rear side of the tube-adding device mounting frame (1). A left liner (702), a clamping plate (703) and a right liner (704) are fixedly installed on the right side of the correction connecting frame (701) from left to right. The space enclosed by the left liner (702), the clamping plate (703) and the right liner (704) is a correction groove (705). The top rod protrusion (605) can pass through the correction groove (705).

6. The continuous pipe feeding device for plug-in screen pipes in coal mines as described in claim 1, characterized in that, The axial front end and axial rear end of the tube-adding device mounting bracket (1) are both fixedly installed with bearing seats (8), bearings are fixedly installed in the bearing seats (8), and rotating shafts (2) are installed in the bearings.

7. The continuous pipe feeding device for plug-in screen pipes in coal mines as described in claim 1, characterized in that, A first proximity switch (9) is fixedly installed on the right side of the pipe-adding device mounting bracket (1). The first proximity switch (9) is located behind the rear indexing wheel (3) in the longitudinal direction. A second proximity switch (10) is fixedly installed on the left side of the pipe-adding device mounting bracket (1). The second proximity switch (10) is located in front of the top rod assembly (6) in the longitudinal direction.

8. The continuous pipe feeding device for plug-in screen pipes in coal mines as described in claim 7, characterized in that, The first proximity switch connecting plate (11) is fixedly installed on the right side of the pipe-adding device mounting bracket (1), the first proximity switch protective cover (12) is fixedly installed on the first proximity switch connecting plate (11), and the first proximity switch (9) is fixedly installed inside the first proximity switch protective cover (12).

9. The continuous pipe feeding device for plug-in screen pipes in coal mines as described in claim 6, characterized in that, The second proximity switch connecting plate (13) is fixedly installed on the left side of the pipe-adding device mounting bracket (1). The second proximity switch protective cover (14) is fixedly installed on the second proximity switch connecting plate (13). The second proximity switch (10) is fixedly installed inside the second proximity switch protective cover (14).

Images