Method for unblocking a downhole extraction pipe

Abstract

The present application relates to a kind of well down extraction pipeline unblocking methods, multiple fixed tees are set on extraction pipeline according to set interval, and extraction pipeline is divided into multiple sections;With fixed tee as the entrance of unblocking cleaning and slag discharge outlet, unblocking device enters extraction pipeline from fixed tee, under the condition that extraction pipeline is continuously extracted, high pressure jet is used to unblock extraction pipeline in section;The sluice valve on the fixed tee adjacent to the fixed tee of unblocking operation connects water discharger, and the water slag generated by unblocking operation is partially introduced into slag discharge device through steering slag discharge integrated device, and the other part enters water discharger;Unblocking device uses self-advancing unblocking nozzle, realizes self-rotation and self-advancing function, improves unblocking efficiency and effect, steering slag discharge integrated device can realize the steering transport of unblocking device, slag discharge device can realize online cleaning and synchronous slag discharge, linkage control of multiple one-way valves is realized using buoyancy and pressure difference change, and the automation of slag discharge is realized.

Description

Technical Field

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

[0002] my country's coal mines have complex geological structures and coal seam occurrence conditions. Over 50% of currently operating mines are gassy or experience coal and gas outbursts, including 757 mines with coal and gas outbursts and 1,024 with gassy coal. Regulations require that all mines with gassy or coal and gas outbursts in my country have established gas extraction systems. However, investigations have revealed that while average gas extraction rates in countries like Russia, the United States, and Australia exceed 50%, the average extraction rate in most mines in my country is only 23%.

[0003] 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.

[0004] 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.

[0005] 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.

[0006] 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

[0007] In view of this, the purpose of the present invention is to solve the above problems and provide a method for unblocking underground extraction pipelines.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A method for unblocking an underground extraction pipeline comprises: providing a plurality of fixed tees at set intervals on the extraction pipeline to divide the extraction pipeline into several sections; using the fixed tees as access ports and slag discharge outlets for unblocking and cleaning; an unblocking device enters the extraction pipeline through the fixed tees; and while the extraction pipeline is continuously pumped, a high-pressure jet is used to unblock the extraction pipeline in sections; and a gate valve is installed on each fixed tee to control the opening and closing of the access port.

[0010] When unblocking, a slag discharge tee is connected to the gate valve of one of the fixed tee pipes, and a diverting conveyor is installed in the slag discharge tee pipe. The fixed tee pipe, the gate valve, and the diverting conveyor together constitute an integrated diverting and slag discharge device; the slag discharge tee pipe includes a straight pipe and a side pipe obliquely arranged on the side wall of the straight pipe; one end of the straight pipe is detachably connected to the gate valve, and the diverting conveyor is inserted from the other end of the straight pipe, passes through the gate valve and extends into the fixed tee pipe; a pipe delivery channel penetrating the diverting conveyor is provided in the diverting conveyor, and the unblocking device enters the extraction pipeline from the pipe delivery channel, and the direction in which the unblocking device enters the extraction pipeline is changed by rotating the diverting conveyor;

[0011] One end of the side pipe is connected to the gate valve through a straight pipe, and the other end is connected to the slag discharge device; a sealing ring is provided at the end of the straight pipe away from the gate valve, and the sealing ring is provided between the diverting conveyor and the straight pipe to prevent slag water from flowing out of the straight pipe; the end surface of the sealing ring close to the side pipe is an inclined surface and is inclined toward the side pipe, so that the slag water is diverted into the side pipe through the inclined surface; a locking device is also provided at the end of the straight pipe away from the gate valve for fixing the diverting conveyor;

[0012] The gate valve on the fixed tee pipe adjacent to the fixed tee pipe for unblocking operation is connected to the water discharger. The water slag generated by the unblocking operation partially enters the slag discharge device through the integrated slag discharge device, and the other part enters the water discharger.

[0013] The blockage clearing device includes a frame, a pipe reel device, a propulsion device, a high-pressure pump group, a hydraulic pipe, a self-propelled blockage clearing nozzle and a control system; the pipe reel device, the propulsion device and the high-pressure pump group are all connected to the control system and controlled by the control system; one end of the hydraulic pipe is connected to the high-pressure pump group, and the other end is connected to the self-propelled blockage clearing nozzle, and high-pressure water is delivered to the self-propelled blockage clearing nozzle through the high-pressure pump group; the hydraulic pipe is wound on the pipe reel device, and the hydraulic pipe is reeled by rotating the pipe reel device; the propulsion device is located on one side of the pipe reel device, and is linked to the pipe reel device, clamping and pushing the hydraulic pipe to move the self-propelled blockage clearing nozzle from the pipe delivery channel into the extraction pipeline, and performing blockage clearing operations by jetting.

[0014] and a tube connecting the discharging opening of the pump with a plug in the forward end of the crank case, said tube having a check valve in it at the pump end, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug, and said former tube which connects the pump to the oil drain plug,

[0015] The float drive mechanism includes a float, a push rod, a movable magnetic device, and a fixed magnetic device; an internal water discharge bracket is provided in the water collecting chamber, and the push rod is slidably provided on the internal water discharge bracket, one end of the push rod is connected to the float, and the other end is opposite to the positive pressure one-way valve, and the positive pressure one-way valve is opened when the float rises; the movable magnetic device is provided on the end of the push rod away from the float, and the fixed magnetic device is fixed on the top of the water collecting chamber and is opposite to the movable magnetic device. After the float rises, the movable magnetic device and the fixed magnetic device are attracted to each other, and the magnetic force and the buoyancy of the float jointly maintain the open state of the positive pressure one-way valve; the magnetic force of the movable magnetic device and the fixed magnetic device is less than the gravity of the float; when the water in the water collecting chamber separates from the float, the float separates the movable magnetic device from the fixed magnetic device under the action of gravity, automatically descends, and closes the positive pressure one-way valve.

[0016] Furthermore, a sealing ring is provided at one end of the straight pipe away from the gate valve, and the sealing ring is provided between the steering conveyor and the straight pipe to prevent slag water from flowing out of the straight pipe; the end face of the sealing ring close to the side pipe is an inclined surface, and is inclined toward the side pipe, so that the slag water is guided into the side pipe through the inclined surface; a locking device is also provided at one end of the straight pipe away from the gate valve for fixing the steering conveyor.

[0017] Furthermore, the steering conveyor includes a hollow tube and a steering head, and the steering head is connected to one end of the hollow tube by a thread; a steering bend is provided in the steering head, and a guide wheel is provided on the side wall of the steering bend; the opening at one end of the steering bend is connected to the hollow tube, and the opening at the other end is located on the side wall of the steering head, and the steering bend and the inner hole of the hollow tube together form the pipe delivery channel; by rotating the hollow tube and the steering head, the direction in which the self-propelled unblocking nozzle enters the extraction pipeline is changed; a ball valve is provided at the end of the hollow tube away from the steering head, which is used to control the opening and closing of the pipe delivery channel.

[0018] 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 provided on the base, and the hydraulic pipe is spirally wound on the reel; the reel is transmission-connected to the pipe reel motor and rotates under the drive of the pipe reel motor; 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; a slide rail arranged along the rotation axis direction of the pipe reel device is provided on the swinging bracket, and the slider is slidably provided on the slide rail; the swinging guide wheel is arranged up and down and 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.

[0019] 6. The method for clearing blockage in underground extraction pipelines according to claim 1 is 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 fixedly arranged 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 fixedly arranged 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.

[0020] 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; the tail stock 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, the end of the second water flow channel is provided with a rear nozzle opening toward the rear of the tail stock; the end of the third water flow channel is provided with a side nozzle opening toward the side of the shell; the rotating nozzle self-rotates under the jet drive of the rotating nozzle, and the tail stock is provided with a rotating nozzle. The seat drives the shell to move forward under the jet drive of the rear nozzle; the rotating nozzle includes a rotating head and a rotating shaft; the rotating head is fixed 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 in the center of the rotating head, and the rotating nozzle is provided on one side of the front nozzle, and the opening direction is inclined toward the circumference of the rotating head; the rotating nozzle has one or multiple nozzles distributed in a circular array; there are multiple side nozzles and rear nozzles, and they are all distributed in a circular array.

[0021] Furthermore, 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 tail stock; 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 sealed by a Gray ring.

[0022] Furthermore, the blockage-clearing device 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; an observation window is provided on the protective shell, and a lifting ring is also provided on the protective shell for lifting and moving; universal support wheels and directional support wheels are provided at the bottom of the frame, and a braking mechanism is provided on the directional support wheels; a push-pull rod is also provided on the frame for manual pushing and pulling; a brake handle is provided on the push-pull rod, and the brake handle is connected to the brake mechanism to control the braking.

[0023] Furthermore, the slag discharge device includes a buffer chamber and a slag discharge chamber provided on the slag discharge bracket; the buffer chamber is fixedly provided on the side wall of the slag discharge chamber and is in one-way communication with the slag discharge chamber via a first negative pressure one-way valve; a vertically arranged connecting pipe is provided at one end of the buffer chamber away from the slag discharge chamber, and the connecting pipe is externally connected to the slag discharge pipe of the extraction pipeline via a flange;

[0024] The buffer chamber and the slag discharge chamber are both provided with an air pipe interface and are interconnected through the air pipe; the slag discharge chamber is a closed chamber, a positive pressure one-way valve is provided at the top of the slag discharge chamber, and a second negative pressure one-way valve is provided at the bottom for discharging water slag outward; the positive pressure one-way valve is connected to a float drive mechanism for controlling the opening and closing of the positive pressure one-way valve; when the positive pressure one-way valve is closed, the first negative pressure one-way valve is opened, the second negative pressure one-way valve is closed, and the water slag enters the slag discharge chamber from the buffer chamber; when the positive pressure one-way valve is opened, the first negative pressure one-way valve is closed, the second negative pressure one-way valve is opened, and the water slag is discharged from the slag discharge chamber through the second negative pressure one-way valve;

[0025] The float drive mechanism includes a float, a push rod, a movable magnetic device, and a fixed magnetic device; an inner slag discharge bracket is provided in the slag discharge chamber, and the push rod is slidably provided on the inner slag discharge bracket. One end of the push rod is connected to the float, and the other end is opposite to the positive pressure one-way valve. When the float rises, the positive pressure one-way valve is opened;

[0026] The movable magnetic device is arranged on the end of the push rod away from the float, and the fixed magnetic device is fixedly arranged on the top of the slag discharge chamber and is opposite to the movable magnetic device. After the float rises, the movable magnetic device and the fixed magnetic device are attracted to each other, and the magnetic force and the buoyancy of the float jointly maintain the open state of the positive pressure one-way valve; the magnetic force of the movable magnetic device and the fixed magnetic device is less than the gravity of the float; when the water in the slag discharge chamber separates from the float, the float separates the movable magnetic device from the fixed magnetic device under the action of gravity, automatically descends, and closes the positive pressure one-way valve.

[0027] The beneficial effects of the present invention are:

[0028] 1. The blockage clearing device of the present invention utilizes a self-propelled blockage clearing nozzle that can achieve self-rotation and self-advancement functions. It uses a high-pressure jet to actively clean the pipeline, 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.

[0029] 2. The integrated deflection and slag removal device of this invention enables the decongestion device to steer its delivery, conveniently adjusting the direction in which the decongestion device enters the extraction pipeline to accommodate various extraction pipeline layouts. Furthermore, it effectively discharges slag water, preventing gas leakage. The integration of decongestion steering and slag removal functions allows for online cleaning of the extraction pipeline without affecting gas delivery, improving extraction efficiency and safety.

[0030] 3. The slag discharge device of the present invention can realize online cleaning and slag discharge simultaneously, improve the efficiency of unblocking, and reduce manual operations; at the same time, two cavities are set up to isolate the slag water transportation and the slag discharge of the extraction pipeline through the buffer cavity, thereby reducing the risk of gas leakage.

[0031] 4. Both the slag discharge device and the water discharger adopt a float control mechanism, which uses buoyancy and pressure difference changes to achieve linkage control of multiple one-way valves, realizing the automation of slag discharge without the need for external power or gas source, with high reliability, energy saving, simplified structure and easy maintenance.

[0032] 5. The method of the present invention is simple, easy to install, flexible to operate, and low in cost. It is suitable for online cleaning and maintenance of gas extraction pipelines in coal mines. The extraction pipeline does not need to be closed during the unblocking process.

[0033] 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

[0034] 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:

[0035] Figure 1 It is an overall schematic diagram of the underground extraction pipeline unblocking method of the present invention.

[0036] Figure 2 It is an overall schematic diagram of the blockage relieving device in the present invention.

[0037] Figure 3 It is a front view of the blockage relieving device in the present invention.

[0038] Figure 4 for Figure 3 Top view of .

[0039] Figure 5 for Figure 3 Left view of .

[0040] Figure 6 It is a front view of the tube reel device and the propulsion device in the present invention.

[0041] Figure 7 for Figure 6 Top view of .

[0042] Figure 8 for Figure 6 Left view of .

[0043] Figure 9 It is a front view of the propulsion device in the present invention.

[0044] Figure 10 It is a top view of the propulsion device in the present invention.

[0045] Figure 11 It is a left view of the propulsion device in the present invention.

[0046] Figure 12 It is a schematic diagram of the driving wheel transmission structure.

[0047] Figure 13 It is a front view of the self-propelled blockage-clearing nozzle in the present invention.

[0048] Figure 14 for Figure 13 Schematic diagram of the tailstock.

[0049] Figure 15 for Figure 13 Schematic diagram of the central rotation axis.

[0050] Figure 16 、 17 18 are schematic diagrams of three distribution structures of the rotary nozzle in the present invention.

[0051] Figure 19 It is a structural schematic diagram of the steering and slag discharge integrated device.

[0052] Figure 20 Schematic diagram of the steering head structure.

[0053] Figure 21 Schematic diagram of the overall structure of the slag discharge device.

[0054] Figure 22 Schematic diagram of the internal structure of the slag discharge device.

[0055] Figure 23 Schematic diagram of the overall structure of the water discharger.

[0056] Figure 24 This is a view of the internal structure of the water dispenser.

[0057] Reference numerals: 1-blocking device; 2-steering and slag discharge integrated device; 3-slag discharge device; 4-water discharger; 5-self-propelled blockage-clearing nozzle; 6-hydraulic pipe; 7-extraction pipeline;

[0058] 11-frame; 12-hose reel; 13-propulsion device; 14-high-pressure pump unit; 15-protection shell; 16-control system; 17-universal support wheel; 18-directional support wheel; 19-brake mechanism;

[0059] 21-Fixed tee; 22-Gate valve; 23-Slag discharge tee; 24-Steering conveyor; 25-Sealing ring; 26-Locking device; 27-Sealing ring; 241-Steering head; 231-Straight pipe; 232-Side pipe; 242-Guide wheel; 243-Hollow pipe; 244-Ball valve;

[0060] 31 - slag discharge chamber; 32 - buffer chamber; 33 - three-legged bracket; 34 - two-legged bracket; 35 - air pipe; 311 - positive pressure one-way valve; 312 - cover plate; 313 - second negative pressure one-way valve; 314 - float; 315 - ejector rod; 316 - movable magnetic device; 317 - fixed magnetic device; 318 - inner bracket; 319 - handle; 321 - connecting pipe; 322 - first negative pressure one-way valve;

[0061] 41 - water collection chamber; 42 - positive pressure one-way valve; 43 - cover plate; 44 - second negative pressure one-way valve; 45 - connecting pipe; 46 - air pipe; 47 - handle; 48 - first negative pressure one-way valve; 491 - float; 492 - push rod; 493 - movable magnetic device; 494 - fixed magnetic device; 495 - internal water discharge bracket;

[0062] 51-housing; 52-tailstock; 53-rotating head; 54-rotating shaft; 55-composite needle roller bearing; 56-Glay ring; 57-sealing ring 27; 58-first water flow channel; 521-rear nozzle; 522-side nozzle; 523-spiral groove; 524-connector; 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-pushing slide rail; 131-pushing bracket; 132-clamping cylinder; 133-pushing motor; 134-upper plate; 135-passive wheel; 136-lower plate; 137-driving wheel; 138-reducer; 139-speed regulating valve; 1311-positioning hole. DETAILED DESCRIPTION

[0063] 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.

[0064] 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.

[0065] 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.

[0066] See also Figures 1 to 24 , which is a method for unblocking an underground extraction pipeline. A plurality of fixed tees 21 are arranged on the extraction pipeline 7 at set intervals to divide the extraction pipeline 7 into several sections. The fixed tees 21 serve as access ports and slag discharge outlets for unblocking and cleaning. The unblocking device 1 enters the extraction pipeline 7 from the fixed tees. While the extraction pipeline 7 is continuously pumped, the extraction pipeline 7 is unblocked in sections using a high-pressure jet. A gate valve 22 is installed on each fixed tee 21 to control the opening and closing of the access port.

[0067] When clearing the blockage, a slag discharge tee 23 is connected to the gate valve 22 of one of the fixed tee pipes 21, and a diverting conveyor 24 is installed in the slag discharge tee pipe 23. The fixed tee pipe 21, the gate valve 22, and the diverting conveyor 23 together constitute an integrated diverting and slag discharge device 2.

[0068] The gate valve on the fixed tee pipe adjacent to the fixed tee pipe 21 for the unblocking operation is connected to the water discharger 4. Part of the water slag generated by the unblocking operation enters the slag discharge device 3 through the integrated slag discharge device 2, and the other part enters the water discharger 4.

[0069] The slag discharge tee 23 comprises a straight pipe 231 and a side pipe 232 obliquely mounted on the sidewall of the straight pipe 231. One end of the straight pipe 231 is detachably connected to the gate valve 22, while the diverter conveyor 24 is inserted from the other end of the straight pipe 231, passing through the gate valve 22 and extending into the fixed tee 21. A pipe delivery channel is provided within the diverter conveyor 24. One end of the side pipe 232 communicates with the gate valve 22 through the straight pipe 231, while the other end is connected to the slag discharge device 3. A sealing ring 25 is mounted on the end of the straight pipe 231 away from the gate valve 22. The sealing ring 25 is installed between the diverter conveyor 24 and the straight pipe 231 to prevent slag liquid from flowing out of the straight pipe 231. The end surface of the sealing ring 25 near the side pipe 232 is inclined and tilted toward the side pipe 232, allowing the slag liquid to flow into the side pipe 232 through the inclined surface. Sealing rings 27 are installed between the sealing ring 25 and the straight pipe 231 , and between the sealing ring 25 and the diverting conveyor 24 .

[0070] The diverting conveyor 24 comprises a hollow tube 243 and a diverting head 241, which is threadedly connected to one end of the hollow tube 243. A diverting bend is provided within the diverting head 241, with one end opening communicating with the hollow tube 243 and the other end opening located on the sidewall of the diverting head 241. The diverting bend and the inner bore of the hollow tube 243 together form a pipe delivery channel. The direction in which the blockage clearing device enters the extraction pipeline 7 is changed by manually or mechanically rotating the hollow tube 243 and the diverting head 241. A plurality of guide wheels 242 are mounted on the sidewalls of the diverting bend to guide the blockage clearing device in turning and reduce frictional resistance caused by the turning.

[0071] A ball valve 244 is mounted on the end of the hollow tube 243 away from the diverter head 241 to control the opening and closing of the pipe delivery channel. A locking device 26 is also mounted on the end of the straight tube 231 away from the gate valve 22 to secure the diverter conveyor 24. In this embodiment, the locking device 26 is a locking screw mounted on the end of the straight tube 231 via a flange. Rotating the locking screw secures the hollow tube 243.

[0072] Among them, the unblocking device 1 used includes 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. 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 by jetting in the extraction pipeline.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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 .

[0077] 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.

[0078] 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.

[0079] 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.

[0080] The slag discharge device 3 includes a buffer chamber 32 and a slag discharge chamber 31 installed on the slag discharge bracket; the buffer chamber 32 is fixedly installed on the side wall of the slag discharge chamber 31, and is unidirectionally connected to the slag discharge chamber 31 through a first negative pressure one-way valve 322; a vertically arranged connecting pipe 321 is provided at one end of the buffer chamber 32 away from the slag discharge chamber 31, and the connecting pipe 321 is connected to the slag discharge pipe of the extraction pipeline through a flange; the buffer chamber 32 is arranged at an angle, and the water slag flows into the slag discharge chamber 31 under the action of gravity.

[0081] The buffer cavity 32 and the slag discharge cavity 31 are both provided with an air pipe 35 interface, and are interconnected through the air pipe 35, so that the buffer cavity 32 and; the slag discharge cavity 31 is a closed cavity, the top of the slag discharge cavity 31 is provided with a positive pressure one-way valve 311, and the bottom is provided with a second negative pressure one-way valve 313 for discharging water slag outward; the positive pressure one-way valve 311 is connected to a float 314 driving mechanism for controlling the opening and closing of the positive pressure one-way valve 311; when the positive pressure one-way valve 311 is closed, the first negative pressure one-way valve 322 is opened, the second negative pressure one-way valve 313 is closed, and the water slag enters the slag discharge cavity 31 from the buffer cavity 32; when the positive pressure one-way valve 311 is opened, the first negative pressure one-way valve 322 is closed, the second negative pressure one-way valve 313 is opened, and the water slag is discharged from the slag discharge cavity 31 through the second negative pressure one-way valve 313.

[0082] The float drive mechanism includes a float 314, a push rod 315, a movable magnetic device 316, and a fixed magnetic device 317. The push rod 315 is slidably mounted on the inner slag discharge bracket 318. One end of the push rod 315 is connected to the float 314, and the other end is opposite the positive pressure check valve 311. When the float 314 rises, the positive pressure check valve 311 opens. The movable magnetic device 316 is mounted on the end of the push rod 315 away from the float 314. The fixed magnetic device 317 is fixedly mounted on the top of the slag discharge chamber 31 and opposite the movable magnetic device 316. When the float 314 rises, the movable magnetic device 316 and the fixed magnetic device 317 are attracted to each other. The magnetic force and the buoyancy of the float 314 jointly maintain the open state of the positive pressure check valve 311. The magnetic force of the movable magnetic device 316 and the fixed magnetic device 317 is less than the gravity of the float 314; when the water in the slag discharge cavity 31 separates from the float 314, the float 314 separates the movable magnetic device 316 from the fixed magnetic device 317 under the action of gravity, automatically descends, and closes the positive pressure one-way valve 311.

[0083] The slag discharge support comprises a two-legged support 34 and a three-legged support 33. The slag discharge chamber 31 is fixedly mounted on the three-legged support 33, and the buffer chamber 32 is fixedly mounted on the two-legged support 34. A cover plate 312 is installed on the top of the slag discharge chamber 31, and a positive pressure check valve 311 is fixedly mounted on the cover plate 312. Handles 319 are provided on the side walls of the slag discharge chamber 31 for easy transportation.

[0084] During operation, the upper connecting pipe 321 of the buffer chamber 32 is connected to the extraction pipeline by a flange. At this time, the air pipe 35 connects the buffer chamber 32 and the slag discharge chamber 31. The second negative pressure one-way valve 313 and the positive pressure one-way valve 311 are closed under the action of negative pressure, and the first negative pressure one-way valve 322 is opened. The water slag flowing in from the extraction pipeline first enters the buffer chamber 32 and then enters the slag discharge chamber 31.

[0085] As the amount of water slag increases, the buoyancy of the float 314 drives the push rod 315 to move upward. After reaching a certain limit, the movable magnetic device 316 and the fixed magnetic device 317 are attracted together, and the top of the push rod 315 pushes open the positive pressure one-way valve 311. At this time, the second negative pressure one-way valve 313 is closed, and the first negative pressure one-way valve 322 is opened. The water slag stored in the slag discharge cavity 31 is discharged. At this time, the water slag flowing into the extraction pipeline is temporarily stored in the buffer cavity 32, which does not affect the extraction pipeline unblocking operation.

[0086] After the slag in the slag discharge chamber 31 is completely discharged, the gravity of the float 314 drives the push rod 315 downward, causing the movable magnetic device 316 and the fixed magnetic device 317 to separate. At this time, the positive pressure check valve 311 and the second negative pressure check valve 313 are closed together, and the first negative pressure check valve 322 is then opened. The slag previously temporarily stored in the buffer chamber 32 immediately enters the slag discharge chamber 31. The subsequent process is repeated.

[0087] In this embodiment, multiple fixed tees 21 are installed at intervals on the extraction pipeline 7, and each fixed tee 21 is installed with a gate valve 22; when one of the fixed tee 21 is connected to the slag discharge tee 23 for unblocking operation, the gate valve 22 on the fixed tee 21 adjacent to the fixed tee 21 is connected to the water discharger 4.

[0088] Among them, the water discharger 4 includes a water collecting cavity 41 installed on the water discharge bracket; a connecting pipe 45 is provided on the side wall of the water collecting cavity 41, and the connecting pipe 45 is connected to the slag discharge pipe of the extraction pipeline through a hose; the connecting pipe 45 and the water collecting cavity 41 are connected in one direction through a first negative pressure one-way valve 48; the connecting pipe 45 is arranged at an angle, and the water slag flows into the water collecting cavity 41 under the action of gravity.

[0089] Among them, the water collecting cavity 41 and the connecting pipe 45 are both provided with an air pipe 46 interface, and are interconnected through the air pipe 46; the water collecting cavity 41 is a closed cavity, and a positive pressure one-way valve 42 is provided on the top of the water collecting cavity 41, and a second negative pressure one-way valve 44 is provided on the bottom for discharging water slag outward; the positive pressure one-way valve 42 is connected to a float 491 driving mechanism for controlling the opening and closing of the positive pressure one-way valve 42; when the positive pressure one-way valve 42 is closed, the first negative pressure one-way valve 48 is opened, the second negative pressure one-way valve 44 is closed, and water slag enters the water collecting cavity 41 from the connecting pipe 45; when the positive pressure one-way valve 42 is opened, the first negative pressure one-way valve 48 is closed, the second negative pressure one-way valve 44 is opened, and water slag is discharged from the water collecting cavity 41 through the second negative pressure one-way valve 44.

[0090] The float drive mechanism includes a float 491, a push rod 492, a movable magnetic device 493, and a fixed magnetic device 494. An internal water discharge bracket 495 is provided in the water collection chamber 41, and a push rod 492 is slidably mounted on the internal water discharge bracket 495. One end of the push rod 492 is connected to the float 491, and the other end is opposite the positive pressure one-way valve 42. When the float 491 rises, the positive pressure one-way valve 42 opens. The movable magnetic device 493 is mounted on the end of the push rod 492 away from the float 491. The fixed magnetic device 494 is fixedly mounted on the top of the water collection chamber 41 and opposite the movable magnetic device 493. After the float 491 rises, the movable magnetic device 493 and the fixed magnetic device 494 are attracted to each other. The magnetic force and the buoyancy of the float 491 jointly maintain the open state of the positive pressure one-way valve 42. The magnetic force between the movable magnetic device 493 and the fixed magnetic device 494 is less than the gravity of the float 491; when the water in the water collecting cavity 41 separates from the float 491, the float 491 separates the movable magnetic device 493 from the fixed magnetic device 494 under the action of gravity, automatically descends, and closes the positive pressure one-way valve 42.

[0091] The water collecting chamber 41 is fixedly mounted on the three-legged bracket, a cover plate 43 is provided on the top of the water collecting chamber 41, and a positive pressure one-way valve 42 is fixedly mounted on the cover plate 43. A handle 47 is provided on the side wall of the water collecting chamber 41 for easy transportation.

[0092] During operation, the connecting pipe 45 is connected to the extraction pipeline. At this time, the air pipe 46 connects the connecting pipe 45 and the water collection chamber 41. The second negative pressure one-way valve 44 and the positive pressure one-way valve 42 are closed under the action of negative pressure, and the first negative pressure one-way valve 48 is opened. The water residue flowing in from the extraction pipeline enters the water collection chamber 41. As the amount of water residue increases, the buoyancy of the float 491 drives the push rod 492 upward. After reaching a certain limit, the movable magnetic device 493 and the fixed magnetic device 494 are attracted together. The positive pressure one-way valve 42 is opened at the top of the push rod 492. At this time, the first negative pressure one-way valve 48 is closed, and the second negative pressure one-way valve 44 is opened, and the water residue stored in the water collection chamber 41 is discharged.

[0093] After the water residue in the water collecting chamber 41 is drained, the top rod 492 moves downward under the action of the gravity of the float 491, so that the movable magnetic device 493 and the fixed magnetic device 494 are separated. At this time, the positive pressure one-way valve 42 and the second negative pressure one-way valve 44 are closed together, and the first negative pressure one-way valve 48 is then opened. After that, the water residue in the extraction pipeline circulates into the water collecting chamber 41 and is discharged according to the above steps.

[0094] The self-propelled unclogging nozzle 5 in this embodiment includes a shell 51, a rotating nozzle, and a tail seat 52; the rotating nozzle is rotatably mounted on the front end of the shell 51, and the tail seat 52 is fixedly mounted on 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 head, 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.

[0095] 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.

[0096] The rotating nozzle 5 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] The blockage clearing device 1 in this embodiment also includes a protective shell 15, which is fixedly mounted on the frame 11. The hose reel 12, propulsion device 13, and high-pressure pump unit 14 are all mounted inside the protective shell 15. The protective shell 15 is provided with a transparent observation window 118 for real-time observation of the hydraulic pipe 6 to prevent the hydraulic pipe 6 from getting tangled. The protective shell 15 is also provided with a lifting ring 111 for lifting and moving. Universal support wheels 17 and directional support wheels 18 are mounted at the bottom of the frame 11, and a brake mechanism 19 is mounted on the directional support wheel 18. The frame 11 is also provided with a push-pull rod 114 for manual pushing and pulling. A brake handle 117 is mounted on the push-pull rod 114, which is connected to the brake mechanism 19 and is used to control braking.

[0101] 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.

[0102] The process of unblocking the extraction pipeline is as follows:

[0103] First, hoist or push the declogging device 1 to the cleaning section of the gas extraction pipeline 7, connect one end of the hydraulic pipe 6 to the self-propelled declogging 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 reel motor 122, the propulsion motor, and the clamping cylinder 132 to the mine compressed air pipeline.

[0104] Connect the integrated deflection and slag discharge device 2 to one of the fixed tees 21. Insert the deflection conveyor 24 into the slag discharge tee 23 and secure it. The side pipe 232 of the slag discharge tee 23 is connected to the slag discharge device 3. The fixed tee adjacent to the fixed tee 21 is connected to the water drain 4.

[0105] 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.

[0106] 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.

[0107] During the cleaning and unblocking process, the slag discharge device 3 simultaneously collects and discharges the water slag, and part of the water slag enters the adjacent water discharger 4.

[0108] When the self-propelled unclogging nozzle 5 completes the unclogging 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 direction of the steering head 241 is adjusted to continue the unclogging operation at the other end of the extraction pipeline.

[0109] Before automatic unblocking and deslagging operations, establish one gas extraction parameter observation point upstream and downstream of the drainage pipe tee in the pipeline network. Before and after the automatic unblocking and deslagging operations are completed, observe extraction parameters such as mixed flow and negative pressure at the upstream and downstream drainage branch pipe observation points at least once daily for 5-10 days. Before and after the automatic jet unblocking and deslagging operations are completed, analyze the monitoring data for parameters such as negative pressure and flow at the upstream and downstream nodes in real time to evaluate the drainage effect after the unblocking.

[0110] 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 method for clearing blockage in an underground extraction pipeline, characterized by: Several fixed tees are installed at set intervals on the extraction pipeline to divide the extraction pipeline into several sections. The fixed tees serve as the access port and slag discharge outlet for unblocking and cleaning. The unblocking device enters the extraction pipeline from the fixed tees. While the extraction pipeline is continuously pumped, the extraction pipeline is unblocked in sections using high-pressure jets. A gate valve is installed on each fixed tee to control the opening and closing of the access port. When unblocking, a slag discharge tee is connected to the gate valve of one of the fixed tee pipes, and a diverting conveyor is installed in the slag discharge tee pipe. The fixed tee pipe, the gate valve, and the diverting conveyor together constitute an integrated diverting and slag discharge device; the slag discharge tee pipe includes a straight pipe and a side pipe obliquely arranged on the side wall of the straight pipe; one end of the straight pipe is detachably connected to the gate valve, and the diverting conveyor is inserted from the other end of the straight pipe, passes through the gate valve and extends into the fixed tee pipe; a pipe delivery channel penetrating the diverting conveyor is provided in the diverting conveyor, and the unblocking device enters the extraction pipeline from the pipe delivery channel, and the direction in which the unblocking device enters the extraction pipeline is changed by rotating the diverting conveyor; One end of the side pipe is connected to the gate valve through a straight pipe, and the other end is connected to the slag discharge device; a sealing ring is provided at the end of the straight pipe away from the gate valve, and the sealing ring is provided between the diverting conveyor and the straight pipe to prevent slag water from flowing out of the straight pipe; the end surface of the sealing ring close to the side pipe is an inclined surface and is inclined toward the side pipe, so that the slag water is diverted into the side pipe through the inclined surface; a locking device is also provided at the end of the straight pipe away from the gate valve for fixing the diverting conveyor; The gate valve on the fixed tee pipe adjacent to the fixed tee pipe for unblocking operation is connected to the water discharger. The water slag generated by the unblocking operation partially enters the slag discharge device through the integrated slag discharge device, and the other part enters the water discharger. The blockage unblocking device includes a frame, a pipe reel device, a propulsion device, a high-pressure pump group, a hydraulic pipe, a self-propelled blockage unblocking nozzle and a control system; the pipe reel device, the propulsion device and the high-pressure pump group are all connected to the control system and controlled by the control system; one end of the hydraulic pipe is connected to the high-pressure pump group, and the other end is connected to the self-propelled blockage unblocking nozzle, and high-pressure water is delivered to the self-propelled blockage unblocking nozzle by the high-pressure pump group; the hydraulic pipe is wound on the pipe reel device, and the hydraulic pipe is retracted by rotating the pipe reel device; the propulsion device is located on one side of the pipe reel device and is linked to the pipe reel device to clamp and push the hydraulic pipe to move the self-propelled blockage unblocking nozzle from the pipe delivery channel into the extraction pipeline, and to perform blockage unblocking operations 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 facing the side of the shell; the rotating nozzle rotates under the drive of the jet of the rotating nozzle, and the tail seat drives the shell to move forward under the drive of 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 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 with the first water flow channel, and the other end is connected with 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 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 sealed by a grid ring.

2. The method for clearing blockage in an underground extraction pipeline according to claim 1, characterized in that: The closure of the water collecting chamber is connected to the closure of the water collecting chamber by a first pressure-sensitive adhesive tape, and the closure of the water collecting chamber is connected to the closure of the water collecting chamber by a second pressure-sensitive adhesive tape. The float drive mechanism includes a float, a push rod, a movable magnetic device, and a fixed magnetic device; an internal water discharge bracket is provided in the water collecting chamber, and the push rod is slidably provided on the internal water discharge bracket, one end of the push rod is connected to the float, and the other end is opposite to the positive pressure one-way valve, and the positive pressure one-way valve is opened when the float rises; the movable magnetic device is provided on the end of the push rod away from the float, and the fixed magnetic device is fixed on the top of the water collecting chamber and is opposite to the movable magnetic device. After the float rises, the movable magnetic device and the fixed magnetic device are attracted to each other, and the magnetic force and the buoyancy of the float jointly maintain the open state of the positive pressure one-way valve; the magnetic force of the movable magnetic device and the fixed magnetic device is less than the gravity of the float; when the water in the water collecting chamber separates from the float, the float separates the movable magnetic device from the fixed magnetic device under the action of gravity, automatically descends, and closes the positive pressure one-way valve.

3. The method for clearing blockage in an underground extraction pipeline according to claim 1, characterized in that: A sealing ring is provided at one end of the straight pipe away from the gate valve, and the sealing ring is arranged between the steering conveyor and the straight pipe to prevent slag water from flowing out of the straight pipe; the end face of the sealing ring close to the side pipe is an inclined surface, and is inclined toward the side pipe, so that the slag water is guided into the side pipe through the inclined surface; a locking device is also provided at one end of the straight pipe away from the gate valve for fixing the steering conveyor.

4. The method for clearing blockage in an underground extraction pipeline according to claim 1, characterized in that: The steering conveyor includes a hollow tube and a steering head, and the steering head is connected to one end of the hollow tube by a thread; a steering bend is provided in the steering head, and a guide wheel is provided on the side wall of the steering bend; the opening at one end of the steering bend is connected to the hollow tube, and the opening at the other end is located on the side wall of the steering head, and the steering bend and the inner hole of the hollow tube together form the pipe delivery channel; by rotating the hollow tube and the steering head, the direction in which the self-propelled unblocking nozzle enters the extraction pipeline is changed; a ball valve is provided at the end of the hollow tube away from the steering head, which is used to control the opening and closing of the pipe delivery channel.

5. The method for clearing blockage in an underground extraction pipeline 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 provided on the base, and the hydraulic pipe is spirally wound on the reel; the reel is transmission-connected to the pipe reel motor and rotates under the drive of the pipe reel motor; 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; a slide rail arranged along the rotation axis direction of the pipe reel device is provided on the swinging bracket, and the slider is slidably provided on the slide rail; the swinging guide wheel is arranged up and down and 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.

6. The method for clearing blockage in an underground extraction pipeline 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.

7. The method for clearing blockage in an underground extraction pipeline according to claim 1, characterized in that: The blockage clearing device 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; an observation window is provided on the protective shell, and a lifting ring is also provided on the protective shell for lifting and moving; universal support wheels and directional support wheels are provided at the bottom of the frame, and a braking mechanism is provided on the directional support wheels; a push-pull rod is also provided on the frame for manual pushing and pulling; a brake handle is provided on the push-pull rod, and the brake handle is connected to the brake mechanism to control the braking.

8. The method for clearing blockage in an underground extraction pipeline according to claim 1, characterized in that: The slag discharge device includes a buffer chamber and a slag discharge chamber provided on a slag discharge bracket; the buffer chamber is fixedly provided on the side wall of the slag discharge chamber and is in one-way communication with the slag discharge chamber via a first negative pressure one-way valve; a vertically arranged connecting pipe is provided at one end of the buffer chamber away from the slag discharge chamber, and the connecting pipe is externally connected to the slag discharge pipe of the extraction pipeline via a flange; The buffer chamber and the slag discharge chamber are both provided with an air pipe interface and are interconnected through the air pipe; the slag discharge chamber is a closed chamber, a positive pressure one-way valve is provided at the top of the slag discharge chamber, and a second negative pressure one-way valve is provided at the bottom for discharging water slag outward; the positive pressure one-way valve is connected to a float drive mechanism for controlling the opening and closing of the positive pressure one-way valve; when the positive pressure one-way valve is closed, the first negative pressure one-way valve is opened, the second negative pressure one-way valve is closed, and the water slag enters the slag discharge chamber from the buffer chamber; when the positive pressure one-way valve is opened, the first negative pressure one-way valve is closed, the second negative pressure one-way valve is opened, and the water slag is discharged from the slag discharge chamber through the second negative pressure one-way valve; The float drive mechanism includes a float, a push rod, a movable magnetic device, and a fixed magnetic device; an inner slag discharge bracket is provided in the slag discharge chamber, and the push rod is slidably provided on the inner slag discharge bracket. One end of the push rod is connected to the float, and the other end is opposite to the positive pressure one-way valve. When the float rises, the positive pressure one-way valve is opened; The movable magnetic device is arranged on the end of the push rod away from the float, and the fixed magnetic device is fixedly arranged on the top of the slag discharge chamber and is opposite to the movable magnetic device. After the float rises, the movable magnetic device and the fixed magnetic device are attracted to each other, and the magnetic force and the buoyancy of the float jointly maintain the open state of the positive pressure one-way valve; the magnetic force of the movable magnetic device and the fixed magnetic device is less than the gravity of the float; when the water in the slag discharge chamber separates from the float, the float separates the movable magnetic device from the fixed magnetic device under the action of gravity, automatically descends, and closes the positive pressure one-way valve.

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