Downhole extraction pipeline unblocking device

Abstract

The present application relates to a kind of well down extraction pipeline dredging and plugging device, including rack, pipe winding device, propelling device, high-pressure pump group, hydraulic pipe, self-advancing dredging and plugging nozzle and control system;Pipe winding device, propelling device, high-pressure pump group are connected with control system, and are controlled by control system;Hydraulic pipe is wound on pipe winding device, and the winding of hydraulic pipe is realized by pipe winding device rotation;Propelling device is located in the side of pipe winding device, and is linked with pipe winding device, and hydraulic pipe is pushed into extraction pipeline by clamping;One end of hydraulic pipe is connected with high-pressure pump group, the other end is connected with self-advancing dredging and plugging nozzle, and high-pressure water is transported to self-advancing dredging and plugging nozzle by high-pressure pump group, and self-advancing dredging and plugging nozzle carries out dredging and plugging operation by jet in extraction pipe.The nozzle can realize self-rotation and self-advancing function, improve dredging and plugging efficiency and effect, reduce manual operation intensity;Pipe winding device and propelling device realize the automatic winding and push of hydraulic pipe, avoid knotting and damage of hydraulic pipe.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline unblocking, and relates to a device for unblocking underground extraction pipelines. Background Art

[0002] The low gas extraction rate in my country's mines is primarily due to two factors. First, over 95% of my country's high-gas and outburst mines operate in coal seams with low permeability, making coal seam gas extraction extremely difficult. Second, during actual mine gas extraction, large amounts of fissure water and coal slag from the coal strata, driven by gravity and negative pressure, enter the gas extraction pipelines, causing blockage. Field research and field surveys conducted on multiple gas control projects at our institute revealed that gas extraction pipelines are severely clogged at key locations such as "low points" and "inflection points" after long-term operation. In some areas, blockages extend up to one-quarter to one-third of the entire pipeline cross-section. Furthermore, coal slag is dispersed and deposited 30 to 40 meters before and after these key locations. This blockage dramatically reduces the effective extraction cross-section of the extraction pipelines and significantly increases the pressure drop caused by the negative extraction pressure. This significantly increases the power consumption of the gas extraction equipment, significantly reduces gas extraction efficiency, and in severe cases, can even lead to complete failure of the entire gas extraction system.

[0003] To address the problem of gas extraction pipe networks being prone to blockage, some coal companies and research institutes have developed supporting slag removal technologies and equipment. Currently, most mines in my country primarily use equipment such as negative pressure water release devices to address this issue. However, research has found that after long-term operation, these devices often experience blockages in the floats, as coal slag from the gas extraction pipe networks flows into the devices along with the water. This causes the automatic negative pressure water release to frequently malfunction, requiring frequent maintenance. Huainan Mining Group has developed a combined filtering and slag removal device, which adds a control gate valve in the middle of the slag remover to divide it into two upper and lower chambers. When the extraction system is operating normally, the gate valve is opened, and the coal slag pumped in can fall along the baffle to the bottom of the tank and separate from the gas. When removing the slag, the gate valve is closed to separate the lower chamber from the upper chamber, and the upper chamber can continue to be extracted because the lower chamber is separated from the negative pressure. The slag removal operation can be carried out by opening the air vent. However, this method requires manual control of the gate valve to complete the fixed-point slag removal operation, which is only suitable for intercepting coal slag at the front end of the drilling site. At the same time, this method artificially increases the resistance of the extraction system; North China University of Science and Technology has developed a A visual water drainage and slag removal system for gas extraction pipelines, which is controlled by a solenoid valve. The large-box water drainer has high water discharge efficiency, strong reliability and slag removal function. However, due to its large size, this method is only suitable for pipelines such as gas extraction main pipes, and belongs to fixed-point slag removal. Our institute has also developed a new type of drawer-type slag remover for gas extraction pipelines. The screen baffle of the slag remover adopts a drawer-type structure design, which has the characteristics of optional screen and easy cleaning. It has high slag removal efficiency and easy maintenance. It is suitable for installation in gas extraction main pipes, trunk pipes and branch pipes. However, this method also requires manual cleaning, and the screen baffle of the slag remover is easy to clog and requires frequent maintenance.

[0004] The aforementioned research has resulted in various forms and principles of slag removal equipment for gas extraction pipelines. However, these findings have not been widely adopted in mines nationwide for two main reasons: first, the slag removal equipment itself is prone to clogging, requiring regular maintenance by dedicated personnel; second, the aforementioned technology and equipment employ "passive" slag removal. Since most coal slag cannot enter the slag removal equipment installed lower in the extraction pipeline due to negative pressure, the accumulated slag along the gas extraction pipeline walls cannot be effectively removed. To clean the accumulated slag from the gas extraction pipeline walls, a mine must undergo the following process: suspending extraction at the mining face or goaf, dismantling the pipeline and physically cleaning it, reinstalling the extraction pipeline, and finally resuming gas extraction. This method severely impacts continuous extraction and safe production at the mining face. Furthermore, underground coal mine extraction pipeline networks typically span tens of thousands of meters, making manual disassembly and installation time-consuming and labor-intensive, and posing significant safety risks.

[0005] Therefore, in view of the difficulties that existing slag removal technology and equipment are fixed-point removal, easy to clog and time-consuming and labor-intensive, it is urgent to develop a new slag removal technology and equipment to effectively remove the coal slag deposited in the gas extraction pipeline network and improve the efficiency of coal seam gas extraction. Summary of the Invention

[0006] In view of this, the object of the present invention is to solve the above-mentioned problem and provide a device for clearing blockage of underground extraction pipelines.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A device for unblocking underground extraction pipelines, comprising a frame, a pipe reel, a propulsion device, a high-pressure pump group, a hydraulic pipe, a self-propelled unblocking nozzle and a control system; the pipe reel, the propulsion device and the high-pressure pump group are all connected to the control system and controlled by the control system; the hydraulic pipe is wound around the pipe reel, and the reeling of the hydraulic pipe is achieved by rotating the pipe reel; the propulsion device is located on one side of the pipe reel and is linked to the pipe reel to clamp and push the hydraulic pipe into the extraction pipeline; one end of the hydraulic pipe is connected to the high-pressure pump group, and the other end is connected to the self-propelled unblocking nozzle, and high-pressure water is transported to the self-propelled unblocking nozzle by the high-pressure pump group, and the self-propelled unblocking nozzle performs unblocking operations in the extraction pipe by jetting.

[0009] Furthermore, the pipe reel device includes a base, a reel, and a pipe reel motor; the base is fixed on the frame, the reel is rotatably mounted on the base, and the hydraulic pipe is spirally wound around the reel; the reel is transmission-connected to the pipe reel motor and rotates when driven by the pipe reel motor.

[0010] Furthermore, a swinging guide mechanism is provided between the pipe reel device and the propulsion device; the swinging guide mechanism includes a swinging guide wheel, a slider, and a swinging bracket; the swinging bracket is provided on the base and is located between the pipe reel device and the propulsion device; the swinging bracket is provided with a slide rail arranged along the rotation axis direction of the pipe reel device, and the slider is slidably provided on the slide rail; the swinging guide wheels are arranged up and down and are rotatably provided on the slider, the hydraulic pipe passes through between the swinging guide wheels, and the slider slides as the position of the hydraulic pipe on the pipe reel device changes, thereby guiding and supporting the hydraulic pipe.

[0011] Furthermore, the propulsion device includes a propulsion bracket, an upper plate, a lower plate, a pushing motor, and a clamping cylinder; the lower plate is fixed on the propulsion bracket; the upper plate is slidably connected to the propulsion bracket and is located above the lower plate; a driving wheel is rotatably provided on the lower plate, and the driving wheel is transmission-connected to the pushing motor through a reducer; a passive wheel is rotatably provided on the upper plate, and the clamping cylinder is fixed on the propulsion bracket and connected to the upper plate to drive the upper plate to slide; the passive wheel and the active wheel are arranged opposite to each other, and when the clamping cylinder drives the upper plate to move downward, the passive wheel and the active wheel clamp the hydraulic pipe, and the active wheel is driven to rotate by the pushing motor, thereby driving the hydraulic pipe forward or backward; a positioning frame is fixedly provided on one side of the propulsion bracket, and a positioning hole is provided on the positioning frame, and the hydraulic pipe passes through the positioning hole and is limited by the positioning hole.

[0012] Furthermore, the self-propelled unclogging nozzle includes a shell, a rotating nozzle, and a tail stock; the rotating nozzle is rotatably arranged at the front end of the shell, the tail stock is fixedly arranged at the rear end of the shell, and the tail stock is provided with an interface for connecting to a hydraulic pipe; a first water flow channel arranged axially and communicating with the interface is provided in the tail stock, and a second water flow channel and a third water flow channel arranged radially and both communicating with the first water flow channel are provided; a front nozzle and a rotating nozzle communicating with the first water flow channel are provided on the rotating nozzle, and a rear nozzle opening toward the rear of the tail stock is provided at the end of the third water flow channel; a side nozzle opening toward the side of the shell is provided at the end of the third water flow channel; the rotating nozzle rotates under the jet drive of the rotating nozzle, and the tail stock drives the shell forward under the jet drive of the rear nozzle.

[0013] Furthermore, the rotating nozzle includes a rotating head and a rotating shaft; the rotating head is fixedly arranged at one end of the rotating shaft, and the other end of the rotating shaft extends into the shell and is mounted on the first water flow channel; a spiral groove is provided on the tail seat, and the spiral groove is located between the rotating shaft and the first water flow channel to form a spiral water flow channel; one end of the spiral water flow channel is connected to the first water flow channel, and the other end is connected to the third water flow channel; the front nozzle is located at the center of the rotating head, and the rotating nozzle is arranged on one side of the front nozzle, and the opening direction is inclined toward the circumference of the rotating head; there is one rotating nozzle or multiple nozzles are distributed in a circular array; there are multiple side nozzles and rear nozzles, and they are all distributed in a circular array.

[0014] Furthermore, a concave step is provided at one end of the rotating shaft away from the rotating head, and a buffer cavity is formed between the concave step and the tail seat; the buffer cavity is located between the third water flow channel and the spiral water flow channel, and is connected to the third water flow channel and the spiral water flow channel.

[0015] Furthermore, the rotating shaft is rotatably arranged in the housing through a composite needle roller bearing; a limiting boss is provided on the rotating shaft, and the composite needle roller bearing contacts the limiting boss and is limited by the limiting boss; the rotating shaft and the housing are dynamically sealed by a Gly ring.

[0016] Furthermore, it also includes a protective shell, which is fixed on the frame, and the pipe winding device, propulsion device, and high-pressure pump group are all arranged in the protective shell; the protective shell is provided with an observation window and a lifting ring for lifting and moving.

[0017] Furthermore, the bottom of the frame is provided with universal support wheels and directional support wheels, and the directional support wheels are provided with a braking mechanism; the frame is also provided with a push-pull rod for manual push-pull movement; the push-pull rod is provided with a brake handle, which is connected to the brake mechanism to control the braking.

[0018] The beneficial effects of the present invention are:

[0019] 1. This invention uses a self-propelled blockage-clearing nozzle that can achieve self-rotation and self-advancement functions, actively cleaning the pipeline with a high-pressure jet, improving the efficiency and effectiveness of blockage clearing and reducing the intensity of manual operation. A hose reel and propulsion device can automatically reel and push the hydraulic hose, preventing kinking and damage, and extending the service life of the hydraulic hose. A swinging guide mechanism can effectively guide the hydraulic hose to prevent kinking or excessive bending. The use of pneumatic components can adapt to the harsh underground environment and improve the safety and reliability of the device.

[0020] 2. The present invention has a simple structure, is easy to install, flexible to operate, and has low cost, and is suitable for online cleaning and maintenance of gas extraction pipelines in coal mines.

[0021] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0023] Figure 1 It is an overall schematic diagram of the underground extraction pipeline unblocking device in the present invention.

[0024] Figure 2 It is a front view of the underground extraction pipeline unblocking device of the present invention.

[0025] Figure 3 for Figure 2 Top view of .

[0026] Figure 4 for Figure 2 Left view of .

[0027] Figure 5 It is a front view of the tube reel device and the propulsion device in the present invention.

[0028] Figure 6 for Figure 5 Top view of .

[0029] Figure 7 for Figure 5 Left view of .

[0030] Figure 8 It is a front view of the propulsion device in the present invention.

[0031] Figure 9 It is a top view of the propulsion device in the present invention.

[0032] Figure 10 It is a left view of the propulsion device in the present invention.

[0033] Figure 11 It is a schematic diagram of the driving wheel transmission structure.

[0034] Figure 12 It is a front view of the self-propelled blockage-clearing nozzle in the present invention.

[0035] Figure 13 for Figure 12 Schematic diagram of the tailstock.

[0036] Figure 14 for Figure 12 Schematic diagram of the central rotation axis.

[0037] Figure 15 、 16 17 are schematic diagrams of three distribution structures of the rotary nozzle in the present invention.

[0038] Figure numerals: 5-self-propelled unclogging nozzle; 6-hydraulic pipe; 11-frame; 12-hose reel device; 13-propulsion device; 14-high-pressure pump group; 15-protective shell; 16-control system; 17-universal support wheel; 18-directional support wheel; 19-braking mechanism; 51-housing; 52-tailstock; 53-rotating head; 54-rotating shaft; 55-composite needle roller bearing; 56-Glay ring; 57-sealing ring; 58-first water flow channel; 521-rear nozzle; 522-side nozzle; 523-spiral groove; 524-interface; 525-second water flow channel; 526-third water flow channel; 531-front nozzle; 532-rotating nozzle; 533-sealing boss; 541-limiting boss; 542-concave step ;111-lifting ring;112-air source treatment element;113-ball valve extension rod;114-push-pull rod;115-pressure gauge;116-pressure regulating valve;117-brake handle;118-observation window;121-reel;122-hose reel motor;123-base;124-support frame;125-sprocket chain mechanism;126-swing guide mechanism;1261-swing bracket;1262-slide rail;1263-slider;1264-swing guide wheel;127-propelling slide rail;131-propelling bracket;132-clamping cylinder;133-push motor;134-upper plate;135-passive wheel;136-lower plate;137-driving wheel;138-reducer;139-speed control valve;1311-positioning hole. DETAILED DESCRIPTION

[0039] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0040] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0041] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0042] See also Figures 1 to 17 , which is a downhole extraction pipeline unblocking device, including a frame 11, a pipe reel device 12, a propulsion device 13, a high-pressure pump group 14, a hydraulic pipe 6, a self-propelled unblocking nozzle 5 and a control system 16; the pipe reel device 12, the propulsion device 13 and the high-pressure pump group 14 are all connected to the control system 16 and controlled by the control system 16; the hydraulic pipe 6 is wound on the pipe reel device 12, and the hydraulic pipe 6 is reeled by rotating the pipe reel device 12; the propulsion device 13 is located on one side of the pipe reel device 12 and is linked with the pipe reel device 12 to clamp and push the hydraulic pipe 6 into the extraction pipeline; one end of the hydraulic pipe 6 is connected to the high-pressure pump group 14, and the other end is connected to the self-propelled unblocking nozzle 5, and high-pressure water is transported to the self-propelled unblocking nozzle 5 through the high-pressure pump group 14, and the self-propelled unblocking nozzle 5 performs unblocking operations in the extraction pipe by jetting.

[0043] The hose reel 12 and propulsion device 13 are mounted on a fixed frame, which includes a base 123 and a support frame 124. The hose reel 12 is mounted on the base 123, and a propulsion rail 127 is mounted on the support frame 124. The propulsion device 13 is slidably mounted on the propulsion rail 127 and can be adjusted. A swing guide mechanism 126 is installed between the hose reel 12 and the propulsion device 13. The hydraulic hose 6 is spirally wound around the hose reel 12, and the rotation of the hose reel 12 unwinds or rewinds the hydraulic hose 6. One end of the hydraulic hose 6 passes through the swing guide mechanism 126 and enters the propulsion device 13, which clamps and pushes the hydraulic hose 6.

[0044] Among them, the swinging guide mechanism 126 includes a swinging guide wheel 1264, a slider 1263, and a swinging bracket 1261; the swinging bracket 1261 is installed on the base 123 and is located between the pipe reel device 12 and the propulsion device 13; the swinging bracket 1261 is installed with a slide rail 1262 arranged along the direction of the rotation axis 54 of the pipe reel device 12, and the slider 1263 is slidably installed on the slide rail 1262; the swinging guide wheel 1264 is arranged up and down and is rotatably installed on the slider 1263, and the hydraulic pipe 6 passes through between the swinging guide wheels 1264, and the slider 1263 slides as the position of the hydraulic pipe 6 on the pipe reel device 12 changes, guiding and supporting the hydraulic pipe 6.

[0045] The pipe reel device 12 includes a reel 121 and a reel motor 122 . The reel 121 is rotatably mounted on a fixed frame. The reel motor 122 is connected to the reel 121 via a sprocket chain mechanism 125 . The reel motor 122 drives the reel 121 to rotate.

[0046] Among them, the propulsion device 13 includes a propulsion bracket 131, an upper plate 134, a lower plate 136, a pushing motor 133, and a clamping cylinder 132; the lower plate 136 is fixedly mounted on the propulsion bracket 131; a slide groove is installed on the propulsion bracket 131, and the upper plate 134 is slidably mounted in the slide groove and is located above the lower plate 136; a driving wheel 137 is rotatably mounted on the lower plate 136, and the driving wheel 137 is transmission-connected to the pushing motor 133 through a reducer 138; a driven wheel 135 is rotatably mounted on the upper plate 134, and the clamping cylinder 132 is fixedly mounted on the propulsion bracket 131 and connected to the upper plate 134 to drive the upper plate 134 to slide; the driven wheel 135 and the driving wheel 137 are arranged opposite to each other. When the clamping cylinder 132 drives the upper plate 134 to move downward, the driven wheel 135 and the driving wheel 137 clamp the hydraulic pipe 6, and the driving wheel 137 is driven to rotate by the pushing motor 133, thereby driving the hydraulic pipe 6 forward or backward. A positioning frame is fixedly installed on one side of the propulsion bracket 131 , and a positioning hole 1311 is installed on the positioning frame. The hydraulic pipe 6 passes through the positioning hole 1311 and is limited by the positioning hole 1311 .

[0047] Two clamping cylinders 132 are mounted on the top plate of the propulsion bracket 131. They are connected to either side of the upper plate 134, jointly driving the upper plate 134 to slide. A speed regulating valve 139 is installed on each clamping cylinder 132. The hose reel motor 122 and the push motor 133 are both pneumatic motors, and the push motor 133, the hose reel motor 122, and the clamping cylinders 132 share a common air source.

[0048] Among them, there are multiple driving wheels 137, which are arranged side by side on the lower plate 136, and the driven wheels correspond to the driving wheels 137 one by one; a driving gear is installed at one end of the driving wheel 137, and the reducer 138 is connected to the driving gear; a transmission gear is installed between adjacent driving wheels 137, and the transmission gear is engaged with the adjacent driving gears on both sides for transmission.

[0049] The swing guide wheel 1264, the driving wheel 137 and the driven wheel 135 are all rubber wheels, and arc grooves matching the diameter of the hydraulic pipe 6 are provided on the wheel surface.

[0050] Among them, the self-propelled unclogging nozzle 5 includes a shell 51, a rotating nozzle, and a tail seat 52; the rotating nozzle is rotatably installed at the front end of the shell 51, and the tail seat 52 is fixedly installed at the rear end of the shell 51, and the tail seat 52 is provided with an interface 524 for connecting to a water supply pipe; a first water flow channel 58 arranged axially and communicating with the interface 524 and a second water flow channel 525 and a third water flow channel 526 arranged radially and both communicating with the first water flow channel 58 are provided in the tail seat 52; a front nozzle 531 and a rotating nozzle 532 communicating with the first water flow channel 58 are provided on the rotating nozzle, the front nozzle 531 is located at the center of the rotating head 53, and the rotating nozzle 532 is installed on one side of the front nozzle 531, and the opening direction is inclined toward the circumference of the rotating head 53.

[0051] The end of the second water flow channel 525 is provided with a rear nozzle 521 with an opening toward the rear of the tail seat 52; the end of the third water flow channel 526 is provided with a side nozzle 522 with an opening toward the side of the shell 51; the rotating nozzle rotates under the jet drive of the rotating nozzle 532, and the tail seat 52 drives the shell 51 forward under the jet drive of the rear nozzle 521.

[0052] The rotating nozzle includes a rotating head 53 and a rotating shaft 54. The rotating head 53 is fixedly mounted at one end of the rotating shaft 54. The other end of the rotating shaft 54 ​​extends into the housing 51 and fits over the first water flow channel 58. The tailstock 52 is provided with a spiral groove 523 located between the rotating shaft 54 ​​and the first water flow channel 58, forming a spiral water flow channel. One end of the spiral water flow channel is connected to the first water flow channel 58, and the other end is connected to the third water flow channel 526.

[0053] A concave step 542 is provided at one end of the rotating shaft 54 ​​away from the rotating head 53, and a buffer cavity is formed between the concave step 542 and the tail stock 52; the buffer cavity is located between the third water flow channel 526 and the spiral water flow channel, and is connected to the third water flow channel 526 and the spiral water flow channel.

[0054] The rotating shaft 54 ​​is rotatably mounted within the housing 51 via a composite needle roller bearing 55. A limit boss 541 is provided on the rotating shaft 54, and the composite needle roller bearing 55 contacts and is limited by the limit boss 541. A Gly ring 56 dynamically seals the rotating shaft 54 ​​from the housing 51. A sealing boss 533 is provided within the rotating head 53, and a sealing ring 57 seals the sealing boss 533 against the rotating shaft 54 ​​at its end face.

[0055] There is one rotating nozzle 532 or multiple rotating nozzles distributed in a circular array; there are multiple side nozzles 522 and rear nozzles 521, and they are all distributed in a circular array.

[0056] The underground extraction pipeline unblocking device in this embodiment also includes a protective shell 15, which is fixedly mounted on the frame 11. The pipe reel 12, the propulsion device 13, and the high-pressure pump group 14 are all installed in the protective shell 15; a transparent observation window 118 is provided on the protective shell 15 for real-time hydraulic pipe 6 to prevent the hydraulic pipe 6 from getting knotted, and a lifting ring 111 is also installed on the protective shell 15 for lifting and moving. Universal support wheels 17 and directional support wheels 18 are installed at the bottom of the frame 11, and a brake mechanism 19 is installed on the directional support wheel 18; a push-pull rod 114 is also installed on the frame 11 for manual pushing and pulling; a brake handle 117 is installed on the push-pull rod 114, and the brake handle 117 is connected to the brake mechanism 19, and the brake is controlled by the brake handle 117.

[0057] In this embodiment, the hose reel motor 122, propulsion motor, and high-pressure pump assembly 14 all utilize pneumatic components. A ball valve, dual-male direct current, and direct flow connection are used to connect the high-pressure pump assembly 14, propulsion device 13, and hose reel device 12 to the mine's compressed air pipeline via an air source processing element 112. Simultaneously, the high-pressure pump assembly 14 also utilizes a ball valve, dual-male direct current, and direct flow connection to connect to the mine's water supply pipeline. A corresponding ball valve extension rod 113 controls the ball valve. A pressure regulating valve 116 and a pressure gauge 115 are connected to the high-pressure pump assembly 14 for water pressure control.

[0058] The working process of the underground extraction pipeline unblocking device in this embodiment is as follows:

[0059] First, hoist or push the underground extraction pipeline unblocking device to the cleaning port of the gas extraction pipeline, connect one end of the hydraulic pipe 6 to the self-propelled unblocking nozzle 5, and the other end to the high-pressure pump group 14, connect the high-pressure pump group 14 to the mine water supply pipeline, and connect the pipe reel motor 122, the propulsion motor, and the clamping cylinder 132 to the mine compressed air pipeline.

[0060] Then, open the clamping cylinder 132 to move the upper plate 134 downward, clamp the hydraulic pipe 6 between the driving wheel 137 and the driven wheel 135, turn on the propulsion motor to rotate the driving wheel 137, drive the hydraulic pipe 6 forward, push the self-propelled unblocking nozzle 5 into the extraction pipeline, open the ball valve, and start the high-pressure pump group 14 to deliver high-pressure water to the self-propelled unblocking nozzle 5.

[0061] Next, the self-propelled unclogging nozzle 5 performs unclogging operations in the extraction pipeline. High-pressure water is ejected from the front nozzle 531, the rotating nozzle 532, the rear nozzle 521, and the side nozzle 522, forming a high-speed water jet to flush and clean the blockages in the extraction pipeline and remove the blockages from the extraction pipeline. The jet from the rotating nozzle 532 generates a reaction force on the rotating nozzle, causing the rotating nozzle to rotate on the rotating shaft 54, thereby achieving all-round cleaning of the blockages in the extraction pipeline. The jet from the rear nozzle 521 generates a reaction force on the tailstock 52, causing the tailstock 52 to drive the shell 51 forward, thereby achieving the self-propelling function of the self-propelled unclogging nozzle 5. The cleaning speed is adjusted by controlling the water pressure during the cleaning process.

[0062] Finally, when the self-propelled unblocking nozzle 5 completes the unblocking operation, the high-pressure pump group 14 is turned off, the propulsion motor and the hose reel motor 122 are reversed, and the hydraulic hose 6 is reeled in. The self-propelled unblocking nozzle 5 is removed from the extraction pipeline, completing one unblocking operation.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for clearing blockage in underground extraction pipelines, characterized by: It includes a frame, a pipe reel, a propulsion device, a high-pressure pump group, a hydraulic pipe, a self-propelled blockage-clearing nozzle, and a control system; the pipe reel, propulsion device, and high-pressure pump group are all connected to and controlled by the control system; the hydraulic pipe is wound around the pipe reel, and the reeling of the hydraulic pipe is achieved by the rotation of the pipe reel; the propulsion device is located on one side of the pipe reel and is linked to the pipe reel to clamp and push the hydraulic pipe into the extraction pipeline; One end of the hydraulic pipe is connected to the high-pressure pump group, and the other end is connected to the self-propelled unblocking nozzle. The high-pressure pump group delivers high-pressure water to the self-propelled unblocking nozzle, and the self-propelled unblocking nozzle performs unblocking operations in the extraction pipe by jetting; The self-propelled unclogging nozzle includes a housing, a rotating nozzle, and a tailstock; the rotating nozzle is rotatably mounted at the front end of the housing, the tailstock is fixedly mounted at the rear end of the housing, and the tailstock is provided with an interface for connecting to a hydraulic pipe; the tailstock is provided with a first water flow channel arranged axially and communicating with the interface, and a second water flow channel and a third water flow channel arranged radially and both communicating with the first water flow channel; the rotating nozzle is provided with a front nozzle and a rotating nozzle communicating with the first water flow channel, and the end of the second water flow channel is provided with a rear nozzle opening toward the rear of the tailstock; The end of the third water flow channel is provided with a side nozzle with an opening toward the side of the shell; the rotating nozzle is driven by the jet of the rotating nozzle to rotate, and the tail seat drives the shell to move forward under the jet of the rear nozzle; The rotating nozzle includes a rotating head and a rotating shaft; the rotating head is fixedly arranged at one end of the rotating shaft, and the other end of the rotating shaft extends into the shell and is sleeved on the first water flow channel; a spiral groove is provided on the tail stock, and the spiral groove is located between the rotating shaft and the first water flow channel to form a spiral water flow channel; one end of the spiral water flow channel is connected to the first water flow channel, and the other end is connected to the third water flow channel; the front nozzle is located at the center of the rotating head, and the rotating nozzle is arranged on one side of the front nozzle, and the opening direction is inclined toward the circumference of the rotating head; there is one rotating nozzle or multiple nozzles are distributed in a circular array; there are multiple side nozzles and rear nozzles, and they are all distributed in a circular array; A concave step is provided at the end of the rotating shaft away from the rotating head, and a buffer cavity is formed between the concave step and the tailstock; the buffer cavity is located between the third water flow channel and the spiral water flow channel, and is connected to the third water flow channel and the spiral water flow channel; the rotating shaft is rotatably arranged in the shell through a composite needle roller bearing; a limiting boss is provided on the rotating shaft, and the composite needle roller bearing contacts the limiting boss and is limited by the limiting boss; the rotating shaft and the shell are dynamically sealed by a Gray ring.

2. The underground extraction pipeline unblocking device according to claim 1, characterized in that: The pipe reel device includes a base, a reel, and a pipe reel motor; the base is fixed on the frame, the reel is rotatably mounted on the base, and the hydraulic pipe is spirally wound around the reel; the reel is transmission-connected to the pipe reel motor and rotates when driven by the reel motor.

3. The underground extraction pipeline unblocking device according to claim 2, characterized in that: A swinging guide mechanism is provided between the pipe reel device and the propulsion device; the swinging guide mechanism includes a swinging guide wheel, a slider, and a swinging bracket; the swinging bracket is provided on the base and is located between the pipe reel device and the propulsion device; the swinging bracket is provided with a slide rail arranged along the rotation axis direction of the pipe reel device, and the slider is slidably provided on the slide rail; the swinging guide wheels are arranged up and down and are rotatably provided on the slider, the hydraulic pipe passes through between the swinging guide wheels, and the slider slides as the position of the hydraulic pipe on the pipe reel device changes, guiding and supporting the hydraulic pipe.

4. The underground extraction pipeline unblocking device according to claim 1, characterized in that: The propulsion device includes a propulsion bracket, an upper plate, a lower plate, a pushing motor, and a clamping cylinder; the lower plate is fixed on the propulsion bracket; the upper plate is slidably connected to the propulsion bracket and is located above the lower plate; a driving wheel is rotatably provided on the lower plate, and the driving wheel is transmission-connected to the pushing motor through a reducer; a passive wheel is rotatably provided on the upper plate, and the clamping cylinder is fixed on the propulsion bracket and connected to the upper plate to drive the upper plate to slide; the passive wheel and the active wheel are arranged opposite to each other, and when the clamping cylinder drives the upper plate to move downward, the passive wheel and the active wheel clamp the hydraulic pipe, and the driving wheel is driven to rotate by the pushing motor, thereby driving the hydraulic pipe forward or backward; a positioning frame is fixedly provided on one side of the propulsion bracket, and a positioning hole is provided on the positioning frame. The hydraulic pipe passes through the positioning hole and is limited by the positioning hole.

5. The underground extraction pipeline unblocking device according to claim 1, characterized in that: It also includes a protective shell, which is fixed on the frame, and the pipe winding device, propulsion device, and high-pressure pump group are all arranged in the protective shell; the protective shell is provided with an observation window and a lifting ring for lifting and moving.

6. The underground extraction pipeline unblocking device according to claim 1, characterized in that: The bottom of the frame is provided with a universal support wheel and a directional support wheel, and the directional support wheel is provided with a brake mechanism; the frame is also provided with a push-pull rod for manual push-pull movement; the push-pull rod is provided with a brake handle, which is connected to the brake mechanism to control the brake.

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