Bidirectional water flow drilling machine with hydraulic deslagging and accumulated water cleaning functions and using method

Abstract

The bidirectional water flow drilling machine comprises a drilling machine body and a power head, and is characterized by further comprising a drill bit, a hollow drill rod, a bidirectional sealing swivel joint, an upper water pipe, a bidirectional power water pump system and a lower water pipe which are sequentially connected in series to form a continuous water flow channel. According to the two-way water flow drilling machine, the water flushing function and the water pumping function are combined through the two-way power water pump system, and integration of high-pressure water flushing deslagging and water pumping drainage in a drill hole is achieved. Therefore, accumulated water in the drill hole can be rapidly cleaned while high-pressure hydraulic deslagging is achieved, it is guaranteed that follow-up crack peeping, charge blasting and other geological exploration operations are conducted smoothly, and the operation steps and time are remarkably reduced. Meanwhile, the bidirectional power water pump system adopts water pumping and flushing integration driven by a single motor and a single steering, the size of equipment is reduced, the service life of the equipment is prolonged, connection of pipelines and lines is simplified, and the bidirectional power water pump system is more suitable for operation conditions of narrow and small spaces in mines.

Description

Technical Field

[0001] The invention relates to the technical field of underground coal mine drilling rigs, in particular to a two-way water flow drilling rig for hydraulic slag removal and accumulated water cleaning and a use method thereof. Background Art

[0002] Currently, underground coal mine drilling rigs generally utilize a one-way reciprocating hydraulic deslagging technology, which uses high-pressure water to flush rock debris from the borehole through the gap between the drill rod and the hole wall, achieving deslagging during drilling. However, the effects of gravity and complex hydrological conditions can easily cause significant water accumulation within the hole, hindering subsequent operations such as charging and crack detection. This has become a key issue restricting the continuity and efficiency of drilling operations.

[0003] In order to solve the above problems, the current improvement solutions are as follows: 1. One method is to use an external pump to remove the water in the hole. Although this method can achieve a certain degree of water removal, it has problems such as cumbersome equipment switching, redundant pumping pipelines, and the external pumping equipment occupying construction space. It is difficult to implement efficiently, especially in the narrow and limited space environment underground. 2. Use a bidirectional motor drive system, switching between flushing and draining by changing the motor's direction. While this solution simplifies the structure, it requires frequent forward and reverse switching in actual operation, which can easily cause motor system fatigue, rotor wear, and increased bearing impact. This shortens the motor's service life and reduces system reliability. It is not suitable for high-frequency switching and complex operating environments.

[0004] Therefore, there is an urgent need for a technical solution that can flexibly switch between flushing and pumping modes during drilling, while taking into account compact structure, easy operation and equipment reliability. It is especially suitable for the underground construction needs of coal mines that require coordinated treatment of water accumulation in the hole and slag discharge during drilling operations. Summary of the Invention

[0005] The purpose of the present invention is to provide a two-way water flow drilling rig and a method of use for hydraulic slag removal and accumulated water cleaning, which combines the flushing and pumping functions through a two-way power water pump system to achieve the integration of high-pressure flushing slag removal and accumulated water pumping in the borehole.

[0006] To solve the above technical problems, the present invention provides a two-way water flow drilling rig for hydraulic slag removal and water accumulation cleaning, comprising a drilling rig body and a power head, characterized in that it also comprises a drill bit, a hollow drill rod, a two-way sealed rotary joint, an upper water pipe, a two-way power water pump system and a lower water pipe, which are sequentially connected in series to form a continuous water flow channel; The bidirectional power water pump system can switch between flushing and pumping modes; In the flushing mode, water is pressurized by the bidirectional power water pump system and then flows through the upper water pipe and the hollow drill rod in sequence, and is ejected from the end of the drill bit, forming a directional high-pressure jet to impact the coal and rock cuttings layer on the hole wall. Finally, the coal and rock cuttings are carried out from the bottom of the hole by the water flow through the annular gap between the hollow drill rod and the hole wall, thus realizing hydraulic slag removal; In the pumping mode, under the action of the bidirectional power water pump system, negative pressure is formed, so that the accumulated water in the borehole is pumped out and discharged in sequence through the drill bit, hollow drill rod, upper water pipe and bidirectional power water pump system.

[0007] Preferably, the drill bit is an integral forged structure, and is provided with a drill bit fluid channel for fluid to pass through, and the drill bit fluid channel is connected to the drill rod fluid channel of the hollow drill rod; The front end of the drill bit is provided with a rock-breaking cone tooth structure for crushing coal and rock, and the outer peripheral side wall of the drill bit is distributed with multiple groups of grinding tooth-like protrusion structures around the central axis, and each group of the grinding tooth-like protrusion structures is composed of three conical grinding teeth.

[0008] Preferably, the bidirectional sealed rotary joint comprises a joint housing, in which a radial bearing, a rotating section and a thrust bearing are sequentially arranged along the axial direction; One end of the bidirectional sealed rotary joint is threadedly connected to the water supply pipe, and the rotating section is movably installed in the joint housing and threadedly connected to the end of the hollow drill rod extending into the joint housing; The rotating section is a hollow structure with a joint fluid channel provided inside, so that the drill pipe fluid channel of the hollow drill pipe, the joint fluid channel and the upper water pipe are connected in sequence.

[0009] Preferably, the hollow drill rod and the rotating section are matched with each other by means of a conical surface; the male thread end of the hollow drill rod is provided with an outer conical surface, and the female thread end of the rotating section is provided with an inner conical surface, and when the hollow drill rod and the rotating section are connected in place, the outer conical surface and the inner conical surface form an axial surface contact seal; Sealing ring grooves are separately formed at both ends of the female thread in the rotating section, and a first O-ring and a second O-ring are respectively placed in the sealing ring grooves; When the hollow drill rod is connected to the rotating section, the second O-ring is simultaneously compressed to achieve radial sealing of the thread gap; In the pumping mode, the first O-ring deforms and absorbs under the action of external atmospheric pressure, seals the thread gap, and realizes negative pressure sealing.

[0010] Preferably, the thrust bearing is sleeve-mounted at one end of the rotating section close to the water supply pipe, and is used to withstand the axial thrust generated by high-pressure flushing; the connection between the thrust bearing and the water supply pipe is further sealed by a third O-ring and a V-ring; The radial bearing sleeve is installed on one end of the rotating section close to the hollow drill rod, and is used to bear the radial load generated during rotation; A spring is provided between the radial bearing and the thrust bearing, and the spring provides an axial preload force to enhance the sealing contact force between the upper water pipe connecting end and the drill rod connecting end.

[0011] Preferably, the bidirectional power water pump system includes a drive motor and a pump body; the inner cavity of the pump body is divided into a pumping operation chamber and a flushing operation chamber by an isolation plate;.

[0012] A pumping impeller is provided in the pumping operation chamber, and a flushing impeller is provided in the flushing operation chamber; One end of the pump shaft of the bidirectional power water pump system is connected to the output shaft of the drive motor, and the other end extends through the pumping operation chamber into the flushing operation chamber, and a mechanical seal is used at the connection between the pump shaft and the isolation plate; A first spline hub is provided on the pump shaft located in the pumping operation chamber, and a second spline hub is provided on the pump shaft located in the flushing operation chamber; A pumping hub is provided at the center of the pumping impeller, and the pumping hub is adapted to the first spline hub; a shift fork assembly is provided on one side of the pumping hub, and the pumping impeller is pushed axially by the shift fork assembly, so that the pumping hub and the first spline hub are engaged or disengaged; A flushing hub is provided at the center of the flushing impeller, and the flushing hub is adapted to the second spline hub; a hydraulic cylinder is provided on one side of the flushing impeller, and the flushing impeller is pushed to move axially by the piston rod of the hydraulic cylinder, so that the flushing hub is engaged or disengaged with the second spline hub.

[0013] Preferably, the shift fork assembly comprises an actuating main rod, an actuating auxiliary rod and a shift fork; the gear on the actuating main rod is meshed with the rack on the actuating auxiliary rod; One end of the shift fork is connected to the actuator rod, and the other end is connected to the pumping hub via a coupling sleeve, and the coupling sleeve and the pumping hub are rotatably connected via a bearing; As the main actuator rod rotates, the secondary actuator rod moves axially, and pushes the shift fork and the pumping impeller connected to the shift fork to move axially, thereby pushing the pumping hub to engage or disengage with the first spline hub; The executing main rod and the executing secondary rod are connected by two support rods. One end of the two support rods is sleeved with the central axis of the executing main rod, and the other end is respectively connected to the two ends of the executing secondary rod. When the executing secondary rod moves axially, the support rods make a circular motion around the gear of the executing main rod.

[0014] Preferably, the water supply pipe is connected to the upper portion of the pumping operation chamber via a pumping inlet pipe, and a pumping discharge pipe is further provided below the pumping operation chamber; a first pumping valve and a second pumping valve are respectively installed on the pumping inlet pipe and the pumping discharge pipe; The water supply pipe is connected to the upper part of the flushing operation chamber through a flushing drainage pipe, and a flushing water inlet pipe is also provided below the flushing operation chamber; a first flushing valve and a second flushing valve are respectively installed on the flushing drainage pipe and the flushing water inlet pipe; The pump body is further provided with a water supply pipe, which is communicated with the water pumping operation chamber and the water flushing operation chamber respectively, and a water supply control valve is installed on the water supply pipe.

[0015] Preferably, a filter device is installed on the water inlet pipe, and the filter device includes a filter cylinder, in which knife-edge filter leaves, swirl guide plates, punched pre-filters and wedge-shaped wire filter layers are arranged in sequence along the filtering direction. The end of the filter device close to the water supply pipe is the water inlet end, and the end close to the pump body is the water outlet end. The blade filter consists of 12 blades, which are distributed in a circular pattern at equal intervals on the inner wall of the filter cylinder to cut and crush large-sized coal and rock debris entering the liquid; the swirl guide vanes are 6 pieces, arranged in a spiral shape along the inner wall of the filter cylinder, and the guide vanes are inclined at an angle of 20° to 35° relative to the cylinder axis, guiding the water flow into a rotating flow field to enhance the suspension effect of debris and prevent sedimentation and blockage; The water supply pipe is a three-layer composite structure pipe body; it includes: an outer protective layer made of wear-resistant rubber; a reinforcement layer with a high-strength steel wire cross-woven structure; and an inner lining layer, which is integrally formed by a spiral support spring and thermoplastic polyurethane material through a hot melt process.

[0016] The present invention also provides a method for using a bidirectional water flow drilling rig for hydraulic slag removal and water accumulation cleaning, comprising the following steps: Step A: Install the machine. First, connect the two ends of the water pipe to the two-way power water pump system and the hollow drill pipe respectively, and install the drill bit on the head of the hollow drill pipe. Then, after starting the drilling rig, the power head drives the hollow drill pipe and the drill bit to drill into the coal and rock mass. Step B: When hydraulic slag is discharged, the flushing mode is switched, and the fork assembly is controlled to disengage the first spline hub from the pumping impeller; at the same time, the hydraulic cylinder is started to drive the piston rod to extend forward, pushing the flushing hub to move, so that the flushing hub and the second spline hub are engaged, thereby completing the mechanical transmission connection between the pump shaft and the flushing impeller; then the first flushing valve and the second flushing valve are closed, the water supply control valve is opened, and water is injected into the flushing operation chamber, and then the water supply control valve is closed to complete the pre-filling operation of the flushing operation chamber; then the drive motor is started to drive the flushing impeller to rotate through the pump shaft, the second spline hub and the flushing hub; then the first flushing valve is opened to allow water to flow into the flushing operation chamber, and then the water supply control valve is closed to complete the pre-filling operation of the flushing operation chamber; The water is sucked into the flushing operation chamber of the pump body under the action of the centrifugal force generated by the high-speed rotation of the flushing impeller; then the second flushing valve is slowly opened to allow the high-pressure water to be ejected through the upper water pipe, the drill pipe fluid channel of the hollow drill pipe and the conical diffusion nozzle of the drill bit, forming a directional high-pressure jet to impact the coal and rock cuttings layer on the hole wall. Finally, the coal and rock cuttings are carried out from the bottom of the hole with the water flow through the annular gap between the hollow drill pipe and the hole wall, realizing hydraulic slag removal; wherein, the flushing impeller is composed of three flushing impellers arranged in series along the rotating shaft, forming a superimposed fluid power output structure, which increases the water pressure through fluid dynamics coupling to meet the demand for efficient slag removal under drilling conditions; When draining, switch the pumping mode, first start the hydraulic cylinder to retreat, so that the flushing wheel hub and the second spline hub are disengaged; at the same time, rotate the executive main rod of the fork assembly, and drive the executive secondary rod to move axially through the gear transmission, thereby pushing the fork to move to the predetermined position, so that the first spline hub is inserted into the pumping wheel hub, completing the mechanical connection between the pump shaft and the pumping impeller; then open the first pumping valve, close the second pumping valve, open the water filling control valve, and inject water into the pumping operation chamber, and then close the water filling control valve to complete the pre-filling operation; start the drive motor, and drive the pumping impeller to rotate at high speed through the pump shaft, the first spline hub and the pumping wheel hub. The rotation of the pumping impeller forms a negative pressure area in the pumping operation chamber, so that the accumulated water in the borehole flows into the hollow drill rod through the drill bit, and enters the pumping operation chamber of the pump body through the upper water pipe and the water inlet pipe; slowly open the second pumping valve to discharge the water from the pumping operation chamber, thereby realizing the extraction and discharge of the water in the borehole; Step C1: During the pumping process, a filter device installed on the pumping inlet pipe performs multi-stage filtration on residual coal and rock debris or impurities carried in the borehole water. The accumulated water first flows through the blade filter blades installed at the water inlet end of the filter cylinder. Under the impact of the water flow, larger debris is crushed and preliminary filtration is achieved. The crushed coal and rock debris enters the swirl guide vane area with the water flow. Under the action of hydraulic force, the water flow is rotated and enhanced, so that the coal and rock debris remains in a suspended state to prevent sedimentation and blockage. The water then enters the punched pre-filter for secondary filtration of medium-sized debris. Finally, the water flows through the wedge-shaped wire filter layer for fine filtration, achieving the final interception of fine particles. The filtration process forms a graded filtration structure and a continuous filtration barrier, effectively preventing impurities from entering the pump body, thereby improving the reliability of the pumping operation and the service life of the equipment. In addition, the filtration device is a detachable structure, and by removing the flange clamps provided at both ends of the filter cylinder, the filtration device can be quickly disassembled, replaced, and internally cleaned and maintained. Step C2: When abnormal conditions such as poor drainage, water pressure fluctuations or insufficient orifice backflow occur during continuous pumping, the following emergency treatment steps are included: first, turn off the pumping mode and switch to the high-pressure flushing mode; start the drive motor to drive the flushing impeller to rotate at high speed, and use high-pressure water flow to flush the blockage in the water flow channel; after continuous flushing for 20 to 30 seconds, switch to the pumping mode again; if blockage still exists during the pumping process, repeat the flushing and pumping operations 1 to 3 times to form a closed-loop working cycle of flushing-pumping-flushing to ensure that the water flow channel is completely unblocked.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The bidirectional water flow drilling rig for hydraulic slag removal and water clearing of the present invention combines flushing and pumping functions through a bidirectional powered water pump system, achieving integrated high-pressure flushing and slag removal with the pumping and drainage of water accumulated in the borehole. This means that while achieving high-pressure hydraulic slag removal, it can also quickly clear water accumulated in the borehole, ensuring the smooth progress of subsequent fissure observation, charge blasting, and other geological exploration operations, significantly reducing operational steps and time. Furthermore, the bidirectional powered water pump system of the present invention utilizes a single motor and single-direction drive for integrated flushing and pumping, reducing the size of the equipment, extending its service life, simplifying piping and wiring connections, and making it more adaptable to the confined working conditions of underground mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a two-way water flow drilling rig for hydraulic slag removal and accumulated water cleaning provided by the present invention; Figure 2 It is a structural schematic diagram of the drill bit provided by the present invention; Figure 3 It is a structural schematic diagram of the bidirectional sealed rotary joint provided by the present invention; Figure 4 It is a structural schematic diagram of the internal sealing system of the bidirectional sealing rotary joint provided by the present invention; Figure 5 It is a structural schematic diagram of the bidirectional power water pump system provided by the present invention; Figure 6 It is a schematic diagram of the structure inside the body provided by the present invention; Figure 7 It is a structural schematic diagram of the fork assembly provided by the present invention; Figure 8 This is a diagram showing the installation position of the support rod in the fork assembly provided by the present invention; Figure 9 It is a structural schematic diagram of the filtering device provided by the present invention; Figure 10 It is a structural schematic diagram of the water supply pipe provided by the present invention.

[0019] In the figure: 100, drilling rig body; 200, power head; 1, drill bit; 101, drill bit fluid channel; 102, rock-breaking cone tooth structure; 103, grinding tooth-shaped protrusion structure; 2, hollow drill pipe; 201, outer cone surface; 3, two-way sealed rotary joint; 31, joint housing; 32, radial bearing; 33, rotating section; 331, inner cone surface; 332, first O-ring; 333, second O-ring; 34, thrust bearing; 35, third O-ring; 36, V-ring; 37, spring; 4, water supply pipe; 41, outer sheath; 42, reinforcement layer; 43, inner lining; 5, two-way power water pump system; 51, drive motor; 52, pump body; 521, isolation plate; 522, pumping operation chamber; 523, flushing operation chamber; 524, pumping impeller; 525, flush impeller; 526, pump shaft; 527, first spline hub; 528, second spline hub; 529, pumping hub; 530, flushing hub; 531, fork assembly; 5311, main actuator rod; 5312, auxiliary actuator rod; 5313, fork; 5314, coupling sleeve; 5315, support rod; 532, hydraulic cylinder; 6, downpipe; 7, pumping inlet pipe; 8 , pumping and drainage pipe; 9, flushing and drainage pipe; 10, flushing water inlet pipe; 11, first pumping valve; 12, second pumping valve; 13, first flushing valve; 14, second flushing valve; 15, water supply pipe; 16, water supply control valve; 17, filter device; 171, filter cylinder; 172, knife-edge filter leaves; 173, swirl guide vane; 174, punched pre-filter; 175, wedge wire filter layer. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0023] In addition, the features, operations, and characteristics described in this specification may be combined in any appropriate manner to form various embodiments. Similarly, the steps or actions described in the method may be reordered in a manner readily apparent to those skilled in the art. Therefore, the various sequences in the specification and drawings are provided for clarity of description of a particular embodiment and are not mandatory unless otherwise specified. Example

[0024] The present invention provides a two-way water flow drilling rig for hydraulic slag removal and water cleaning. Figure 1 , including a drilling rig body 100 and a power head 200, characterized in that it also includes a drill bit 1, a hollow drill rod 2, a two-way sealed rotary joint 3, an upper water pipe 4, a two-way power water pump system 5 and a lower water pipe 6, which are connected in series to form a continuous water flow channel.

[0025] The bidirectional power water pump system 5 can switch between two modes: flushing and pumping. In the flushing mode, the water flows through the bidirectional power water pump system 5 and is pressurized, and then passes through the upper water pipe 4 and the hollow drill rod 2 in turn, and is ejected from the end of the drill bit 1, forming a directional high-pressure jet to impact the coal and rock cuttings layer on the hole wall. Finally, the coal and rock cuttings are carried out from the bottom of the hole with the water flow through the annular gap between the hollow drill rod 2 and the hole wall, realizing hydraulic slag discharge. In the pumping mode, under the action of the bidirectional power water pump system 5, a negative pressure is formed, so that the accumulated water in the borehole is pumped out and discharged through the drill bit 1, the hollow drill rod 2, the upper water pipe 4 and the bidirectional power water pump system 5 in turn.

[0026] Specifically, such as Figure 2 As shown, the drill bit 1 is an integral forged structure, and a drill bit fluid channel 101 is provided inside for fluid to pass through. The drill bit fluid channel 101 is connected to the drill rod fluid channel of the hollow drill rod 2; the front end of the drill bit 1 is provided with a rock-breaking cone tooth structure 102 for crushing coal and rock, and the outer peripheral side wall of the drill bit 1 is distributed around the central axis with multiple groups of grinding tooth-like protrusion structures 103, each group of the grinding tooth-like protrusion structures 103 consists of three conical grinding teeth.

[0027] In this embodiment, the rock-breaking cone tooth structure 102 is arranged at the front end of the drill bit 1, and the grinding tooth-like protrusion structure 103 is provided in six groups, which are arranged immediately behind the rock-breaking cone tooth structure 102; the coal rock layer is broken by the above-mentioned rock-breaking cone tooth structure 102, and the grinding tooth-like protrusion structure 103 breaks up the larger pieces of coal dust accumulated on the peripheral side wall of the drill bit 1, thereby effectively preventing the large pieces of coal dust from clogging the slag discharge channel and avoiding the occurrence of drill sticking accidents.

[0028] Specifically, such as Figure 3 As shown, the bidirectional sealed rotary joint 3 includes a joint housing 31, in which a radial bearing 32, a rotating section 33 and a thrust bearing 34 are arranged in sequence along the axial direction; one end of the bidirectional sealed rotary joint 3 is threadedly connected to the water supply pipe 4, and the rotating section 33 is movably installed in the joint housing 31 and threadedly connected to the end of the hollow drill rod 2 extending into the joint housing 31.

[0029] The rotating section 33 is a hollow structure with a joint fluid channel provided inside, so that the drill pipe fluid channel of the hollow drill pipe 2, the joint fluid channel and the water supply pipe 4 are connected in sequence.

[0030] Further, such as Figure 4As shown, the hollow drill rod 2 and the rotating section 33 are matched with each other by means of conical surfaces; the male thread end of the hollow drill rod 2 is provided with an outer conical surface 201, and the female thread end of the rotating section 33 is provided with an inner conical surface 331. When the hollow drill rod 2 and the rotating section 33 are connected in place, the outer conical surface 201 and the inner conical surface 331 form an axial surface contact seal; sealing ring grooves are separately provided at both ends of the female thread of the rotating section 33, and a first O-ring 332 and a second O-ring 333 are respectively placed in the sealing ring grooves.

[0031] When the hollow drill rod 2 is connected to the rotating section 33, the second O-ring 333 is simultaneously compressed to achieve radial sealing of the thread gap.

[0032] In the pumping mode, the first O-ring 332 is deformed and adsorbed under the action of the external atmospheric pressure, thereby sealing the thread gap and achieving negative pressure sealing.

[0033] Furthermore, the thrust bearing 34 is sleeved and installed on one end of the rotating section 33 close to the water supply pipe 4, and is used to withstand the axial thrust generated by high-pressure flushing; the connection between the thrust bearing 34 and the water supply pipe 4 is also sealed by a third O-ring 35 and a V-ring 36; the radial bearing 32 is sleeved and installed on one end of the rotating section 33 close to the hollow drill rod 2, and is used to withstand the radial load generated during rotation.

[0034] In this embodiment, a spring 37 is provided between the radial bearing 32 and the thrust bearing 34 , and the spring 37 provides an axial preload force to enhance the sealing contact force between the connecting end of the upper water pipe 4 and the connecting end of the drill rod 2 .

[0035] For details, please refer to Figure 5 and Figure 6 The bidirectional power water pump system 5 includes a driving motor 51 and a pump body 52; the inner cavity of the pump body 52 is divided into a pumping operation chamber 522 and a flushing operation chamber 523 by an isolation plate 521; a pumping impeller 524 is provided in the pumping operation chamber 522, and a flushing impeller 525 is provided in the flushing operation chamber 523.

[0036] One end of the pump shaft 526 of the bidirectional power water pump system 5 is connected to the output shaft of the drive motor 51, and the other end extends through the pumping operation chamber 522 into the flushing operation chamber 523. A mechanical seal is used at the connection between the pump shaft 526 and the isolation plate 521. A first spline hub 527 is provided on the pump shaft 526 located in the pumping operation chamber 522, and a second spline hub 528 is provided on the pump shaft 526 located in the flushing operation chamber 523. A pumping wheel hub 529 is provided at the center of the pumping impeller 524, and the pumping wheel hub 529 is adapted to the first spline hub 527. A fork assembly 531 is provided on one side of the pumping hub 529, and the fork assembly 531 is used to push the pumping impeller 524 to move axially, so that the pumping hub 529 is engaged with or disengaged from the first spline hub 527; a flushing hub 530 is provided at the center of the flushing impeller 525, and the flushing hub 530 is adapted to the second spline hub 528; a hydraulic cylinder 532 is provided on one side of the flushing impeller 525, and the piston rod of the hydraulic cylinder 532 pushes the flushing impeller 525 to move axially, so that the flushing hub 530 is engaged with or disengaged from the second spline hub 528.

[0037] In this embodiment, the pumping hub 529 is sleeved and mounted on the pump shaft 526, and has a radial gap of 0.1-0.5 mm between the pumping hub 529 and the pump shaft 526, so that it can move axially along the pump shaft 526. When the pumping hub 529 is separated from the first spline hub 527, the pump shaft 526 idles relative to the pumping impeller 524. When the pumping hub 529 is engaged with the first spline hub 527, the pump shaft 526 drives the pumping impeller 524 to rotate.

[0038] In this embodiment, the hydraulic cylinder 532 is installed outside the pump body 52, and its piston rod passes through the pump body 52 along the central axis and is connected to the flushing hub 530, and a mechanical seal is used at the connection between the piston rod and the pump body 52.

[0039] Further, such as Figure 7 As shown, the fork assembly 531 includes an actuator main rod 5311, an actuator sub-rod 5312 and a shift fork 5313; the gear on the actuator main rod 5311 is engaged with the rack on the actuator sub-rod 5312; one end of the shift fork 5313 is connected to the actuator sub-rod 5312, and the other end is connected to the water pumping hub 529 through a coupling sleeve 5314, and the coupling sleeve 5314 and the water pumping hub 529 are rotatably connected through a bearing.

[0040] As the main actuator rod 5311 rotates, the secondary actuator rod 5312 moves axially, and pushes the fork 5313 and the pumping impeller 524 connected to the fork 5313 to move axially, thereby pushing the pumping hub 529 to engage or disengage with the first spline hub 527.

[0041] Further, such as Figure 8 As shown, the execution main rod 5311 and the execution sub-rod 5312 are connected by two support rods 5315. One end of the two support rods 5315 is connected to the central axis of the execution main rod 5311, and the other end is connected to the two ends of the execution sub-rod 5312 respectively. When the execution sub-rod 5312 moves axially, the support rods 5315 make a circular motion around the gear of the execution main rod 5311.

[0042] For details, please refer to Figure 5 The upper water pipe 4 is connected to the upper portion of the pumping operation chamber 522 via a pumping inlet pipe 7, and a pumping discharge pipe 8 is provided below the pumping operation chamber 522. A first pumping valve 11 and a second pumping valve 12 are installed on the pumping inlet pipe 7 and the pumping discharge pipe 8, respectively. The upper water pipe 4 is connected to the upper portion of the flushing operation chamber 523 via a flushing discharge pipe 9, and a flushing inlet pipe 10 is provided below the flushing operation chamber 523. A first flushing valve 13 and a second flushing valve 14 are installed on the flushing discharge pipe 9 and the flushing inlet pipe 10, respectively. The pump body 52 is also provided with a water supply pipe 15, which is in communication with the pumping operation chamber 522 and the flushing operation chamber 523, respectively, and is equipped with a water supply control valve 16. The pumping discharge pipe 8 and the flushing inlet pipe 10 here correspond to the lower water pipe 6 mentioned above.

[0043] For further information, please also refer to Figure 9 A filter device 17 is installed on the water pumping inlet pipe 7, and the filter device 17 includes a filter cylinder 171. Knife-edge filter leaves 172, swirl guide plates 173, punched pre-filter screens 174 and wedge-shaped wire filter layers 175 are arranged in sequence along the filtering direction in the filter cylinder 171. The end of the filter device 17 close to the water supply pipe 4 is the water inlet end, and the end close to the pump body 52 is the water outlet end.

[0044] Among them, the blade filter leaves 172 are composed of 12 blades, which are distributed in a circular shape with equal intervals on the inner wall of the filter cylinder 171 to cut and crush large-sized coal and rock fragments entering the liquid; the swirl guide plate 173 is a 6-piece structure, which is arranged in a spiral manner along the inner wall of the filter cylinder 171, and the inclination angle of the guide plate relative to the axis of the cylinder is 20°~35°, which guides the water flow into a rotating flow field to enhance the suspension effect of debris and prevent deposition and blockage; the opening rate and aperture parameters of the punched pre-filter 174 are determined according to the diameter of the connected pipeline, the system water flow and the working conditions to achieve effective filtration of medium-sized debris; the gap width w of the wedge wire filter layer 175 satisfies the following relationship: w=0.6+0.002Q, Q is the water flow, unit is m 3 / h, to achieve the final fine filtration; the filtering device 17 is a detachable structure, which is convenient for cleaning and maintenance of the blade filter leaves 172, the swirl guide vanes 173, the punched pre-filter 174 and the wedge wire filter layer 175, to prevent coal and rock debris from entering the pump body and affecting the service life of the equipment.

[0045] For details, please refer to Figure 10 The water pipe 4 is a three-layer composite structure pipe body, suitable for high-pressure flushing and negative pressure pumping conditions; it includes: an outer protective layer 41, made of wear-resistant rubber, with anti-aging and anti-crack properties; The reinforcement layer 42 is a high-strength steel wire cross-woven structure used to improve the tensile and pressure resistance of the pipe body; The inner lining layer 43 is formed as a whole by a helical support spring and thermoplastic polyurethane material through a hot-melt process, has good negative pressure resistance, and is suitable for stable operation in complex underground environments.

[0046] In this embodiment, the water pumping inlet pipe 7 , the water pumping discharge pipe 8 , the flushing discharge pipe 9 , the flushing water inlet pipe 10 , and the water supply pipe 15 all adopt the three-layer composite structure pipe body of the above-mentioned water supply pipe 4 .

[0047] When using the bidirectional water flow drilling rig for hydraulic slag removal and accumulated water cleaning, it is first installed at the construction site, and the two ends of the upper water pipe 4 are respectively connected to the bidirectional power water pump system 5 and the hollow drill rod 2, and the drill bit 1 is installed at the head of the hollow drill rod 2; then after starting the drilling rig body 100, the power head 200 drives the hollow drill rod 2 and the drill bit 1 to drill into the coal rock mass.

[0048] The two-way water flow drilling rig is divided into two working modes. During the first hydraulic slag discharge, the flushing mode is switched to control the fork assembly 531 to disengage the first spline hub 527 from the pumping impeller 524; at the same time, the hydraulic cylinder 532 is started to drive the piston rod to extend forward, pushing the flushing wheel hub 530 to move, so that the flushing wheel hub 530 is engaged with the second spline hub 528, thereby completing the mechanical transmission connection between the pump shaft 526 and the flushing impeller 525; then the first flushing valve 13 and the second flushing valve 14 are closed, the water supply control valve 16 is opened, and water is injected into the flushing operation chamber 523, and then the water supply control valve 16 is closed to complete the pre-filling operation of the flushing operation chamber 523; then the drive motor 51 is started, and the pump shaft 526, the second spline hub 528 and the flushing wheel hub 53 are connected. 0 drives the flushing impeller 525 to rotate; then the first flushing valve 13 is opened, so that the water flow is sucked into the flushing operation chamber 523 of the pump body 52 under the action of the centrifugal force generated by the high-speed rotation of the flushing impeller 525; then the second flushing valve 14 is slowly opened, so that the high-pressure water flow is ejected through the upper water pipe 4, the drill pipe fluid channel of the hollow drill pipe 2 and the conical diffusion nozzle of the drill bit 1, forming a directional high-pressure jet to impact the coal and rock cuttings layer on the hole wall, and finally the coal and rock cuttings are carried out from the bottom of the hole with the water flow through the annular gap between the hollow drill pipe 2 and the wall of the borehole, thereby realizing hydraulic slag discharge; wherein, the flushing impeller is composed of three flushing impellers 525 arranged in series along the rotating shaft, forming a superimposed fluid power output structure, which increases the water pressure through fluid dynamics coupling to meet the demand for efficient slag discharge under drilling conditions. During the second drainage, the pumping mode is switched. First, the hydraulic cylinder 532 is started to retreat, so that the flushing wheel hub 530 is disengaged from the second spline hub 528; at the same time, the execution main rod 5311 of the fork assembly 531 is rotated, and the execution secondary rod 5312 is driven axially through the gear transmission, thereby pushing the fork 5313 to move to the predetermined position, so that the first spline hub 527 is inserted into the pumping wheel hub 529, completing the mechanical connection between the pump shaft 526 and the pumping impeller 524; then the first pumping valve 11 is opened, and the second pumping valve 12 is closed, and the water supply control valve 16 is opened to pump water into the pumping operation chamber. 522 is filled with water, and then the water addition control valve 16 is closed to complete the pre-filling operation; the drive motor 51 is started, and the pumping impeller 524 is driven to rotate at high speed through the pump shaft 526, the first spline hub 527 and the pumping wheel hub 529. The rotation of the pumping impeller 524 forms a negative pressure area in the pumping operation chamber 522, so that the accumulated water in the borehole is collected into the hollow drill rod 2 through the drill bit 1, and enters the pumping operation chamber 522 of the pump body 52 through the water supply pipe 4 and the pumping inlet pipe 7; the second pumping valve 12 is slowly opened to discharge the water from the pumping operation chamber 522, thereby realizing the extraction and discharge of the water in the borehole.

[0049] In addition, during the pumping process, the filtering device 17 arranged on the pumping water inlet pipe 7 is used to perform multi-stage filtration treatment on the residual coal rock chips or impurities carried in the borehole water; the accumulated water first flows through the blade filter leaves 172 arranged at the water inlet end of the filter cylinder 171, and the larger debris is crushed under the impact of the water flow, and preliminary filtration is achieved at the same time; the crushed coal rock debris enters the swirl guide plate 173 area with the water flow, and the water flow is rotated and guided and the disturbance is enhanced under the action of hydraulic force, so that the coal rock debris remains in a suspended state to prevent deposition and blockage; the water flow then enters the punched pre-filter 174 for secondary filtration of medium-sized debris; finally, the water flow is finely filtered through the wedge wire filter layer 175 to achieve the final interception of fine particles.

[0050] The filtration process forms a graded filtration structure and a continuous filtration barrier, which effectively blocks impurities from entering the pump body 52, thereby improving the reliability of the pumping operation and the service life of the equipment; and the filter device 17 is a detachable structure, and by removing the flange clamps provided at both ends of the filter cylinder 171, the filter device 17 can be quickly disassembled, replaced and internally cleaned and maintained.

[0051] When abnormal conditions such as poor drainage, water pressure fluctuations or insufficient orifice backflow occur during continuous pumping, the following emergency treatment steps are included: first, turn off the pumping mode and switch to the high-pressure flushing mode; start the drive motor 51 to drive the flushing impeller 525 to rotate at high speed, and flush the blockage in the water flow channel with high-pressure water flow; after continuous flushing for 20 to 30 seconds, switch to the pumping mode again; if blockage still exists during the pumping process, repeat the flushing and pumping operations 1 to 3 times to form a closed-loop working cycle of flushing-pumping-flushing to ensure that the water flow channel is completely unblocked.

[0052] The bidirectional water flow drilling rig for hydraulic slag removal and water clearing of the present invention combines flushing and pumping functions through a bidirectional powered water pump system, achieving integrated high-pressure flushing and slag removal with the pumping and drainage of water accumulated in the borehole. This means that while achieving high-pressure hydraulic slag removal, it can also quickly clear water accumulated in the borehole, ensuring the smooth progress of subsequent fissure observation, charge blasting, and other geological exploration operations, significantly reducing operational steps and time. Furthermore, the bidirectional powered water pump system of the present invention utilizes a single motor and single-direction drive for integrated flushing and pumping, reducing the size of the equipment, extending its service life, simplifying piping and wiring connections, and making it more adaptable to the confined working conditions of underground mines.

[0053] The above description is only a description of the preferred embodiments of the present invention and does not limit the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A two-way water flow drilling rig for hydraulic slag removal and water accumulation cleaning, comprising a drilling rig body (100) and a power head (200), characterized in that: It also includes a drill bit (1), a hollow drill rod (2), a two-way sealed rotary joint (3), an upper water pipe (4), a two-way power water pump system (5) and a lower water pipe (6), which are sequentially connected in series to form a continuous water flow channel; The bidirectional power water pump system (5) is capable of switching between two modes: flushing and pumping; In the flushing mode, water flows through the bidirectional power water pump system (5) and is pressurized, then flows through the upper water pipe (4) and the hollow drill rod (2) in sequence, and is ejected from the end of the drill bit (1), forming a directional high-pressure jet to impact the coal and rock debris layer on the hole wall. Finally, the coal and rock debris are carried out from the bottom of the hole along with the water flow through the annular gap between the hollow drill rod (2) and the hole wall, thereby realizing hydraulic slag removal; In the pumping mode, under the action of the bidirectional power water pump system (5), negative pressure is formed, so that the water accumulated in the borehole is pumped out and discharged in sequence through the drill bit (1), the hollow drill rod (2), the upper water pipe (4) and the bidirectional power water pump system (5).

2. A two-way water flow drilling rig for hydraulic slag removal and water cleaning as claimed in claim 1, characterized in that: The drill bit (1) is an integral forged structure, and is provided with a drill bit fluid channel (101) for fluid to pass through, wherein the drill bit fluid channel (101) is connected to the drill rod fluid channel of the hollow drill rod (2); The front end of the drill bit (1) is provided with a rock-breaking cone tooth structure (102) for crushing coal and rock, and the outer peripheral side wall of the drill bit (1) is provided with multiple groups of grinding tooth-shaped protrusion structures (103) distributed around the central axis, each group of the grinding tooth-shaped protrusion structures (103) is composed of three conical grinding teeth.

3. A two-way water flow drilling rig for hydraulic slag removal and water cleaning as claimed in claim 1, characterized in that: The bidirectional sealed rotary joint (3) comprises a joint housing (31), wherein a radial bearing (32), a rotating section (33) and a thrust bearing (34) are sequentially arranged in the axial direction within the joint housing (31); One end of the bidirectional sealed rotary joint (3) is threadedly connected to the upper water pipe (4), and the rotating section (33) is movably installed in the joint housing (31) and is threadedly connected to the end of the hollow drill rod (2) extending into the joint housing (31); The rotating section (33) is a hollow structure with a joint fluid channel provided inside, so that the drill pipe fluid channel of the hollow drill pipe (2), the joint fluid channel and the upper water pipe (4) are connected in sequence.

4. A two-way water flow drilling rig for hydraulic slag removal and water cleaning as claimed in claim 3, characterized in that: The hollow drill rod (2) and the rotating section (33) are matched with each other by means of conical surfaces; the male thread end of the hollow drill rod (2) is provided with an outer conical surface (201), and the female thread end of the rotating section (33) is provided with an inner conical surface (331); when the hollow drill rod (2) and the rotating section (33) are connected in place, the outer conical surface (201) and the inner conical surface (331) form an axial surface contact seal; Sealing ring grooves are separately formed at both ends of the female thread in the rotating section (33), and a first O-type sealing ring (332) and a second O-type sealing ring (333) are respectively placed in the sealing ring grooves; When the hollow drill rod (2) is connected to the rotating section (33), the second O-ring (333) is simultaneously compressed to achieve radial sealing of the thread gap; In the pumping mode, the first O-type sealing ring (332) deforms and absorbs under the action of external atmospheric pressure, sealing the thread gap and achieving negative pressure sealing.

5. A two-way water flow drilling rig for hydraulic slag removal and water cleaning as claimed in claim 3, characterized in that: The thrust bearing (34) is sleeved and mounted on one end of the rotating section (33) close to the upper water pipe (4) to withstand the axial thrust generated by high-pressure water flushing; the connection between the thrust bearing (34) and the upper water pipe (4) is also sealed by a third O-ring (35) and a V-ring (36); The radial bearing (32) is sleeved and mounted on one end of the rotating section (33) close to the hollow drill rod (2) and is used to bear the radial load generated during rotation; A spring (37) is provided between the radial bearing (32) and the thrust bearing (34), and the spring (37) provides an axial preload force to enhance the sealing contact force between the connection end of the upper water pipe (4) and the connection end of the drill rod (2).

6. A two-way water flow drilling rig for hydraulic slag removal and water cleaning as claimed in claim 1, characterized in that: The bidirectional power water pump system (5) comprises a driving motor (51) and a pump body (52); an isolation plate (521) is used in the pump body (52) to separate the inner cavity of the pump body (52) into a pumping operation chamber (522) and a flushing operation chamber (523); A pumping impeller (524) is provided in the pumping operation chamber (522), and a flushing impeller (525) is provided in the flushing operation chamber (523); One end of the pump shaft (526) of the bidirectional power water pump system (5) is connected to the output shaft of the drive motor (51), and the other end extends through the pumping operation chamber (522) into the flushing operation chamber (523), and a mechanical seal is used at the connection between the pump shaft (526) and the isolation plate (521); A first spline hub (527) is provided on the pump shaft (526) located in the pumping operation chamber (522), and a second spline hub (528) is provided on the pump shaft (526) located in the flushing operation chamber (523); A pumping hub (529) is provided at the center of the pumping impeller (524), and the pumping hub (529) is adapted to the first spline hub (527); a shift fork assembly (531) is provided on one side of the pumping hub (529), and the pumping impeller (524) is pushed to move axially by the shift fork assembly (531), so that the pumping hub (529) and the first spline hub (527) are engaged or disengaged; A flushing hub (530) is provided at the center of the flushing impeller (525), and the flushing hub (530) is adapted to the second spline hub (528); a hydraulic cylinder (532) is provided on one side of the flushing impeller (525), and the flushing impeller (525) is pushed to move axially by the piston rod of the hydraulic cylinder (532), so that the flushing hub (530) and the second spline hub (528) are engaged or separated.

7. A two-way water flow drilling rig for hydraulic slag removal and water accumulation cleaning as claimed in claim 6, characterized in that: The shift fork assembly (531) comprises an actuating main rod (5311), an actuating auxiliary rod (5312), and a shift fork (5313); a gear on the actuating main rod (5311) meshes with a rack on the actuating auxiliary rod (5312); One end of the shift fork (5313) is connected to the executive secondary rod (5312), and the other end is connected to the water pumping hub (529) via a coupling sleeve (5314), and the coupling sleeve (5314) and the water pumping hub (529) are rotatably connected via a bearing; As the main actuator rod (5311) rotates, the secondary actuator rod (5312) moves axially, and pushes the shift fork (5313) and the pumping impeller (524) connected to the shift fork (5313) to move axially, thereby pushing the pumping hub (529) to engage or disengage with the first spline hub (527); The executing main rod (5311) and the executing secondary rod (5312) are connected by two supporting rods (5315). One end of the two supporting rods (5315) is connected to the central axis of the executing main rod (5311), and the other end is connected to the two ends of the executing secondary rod (5312). When the executing secondary rod (5312) moves axially, the supporting rods (5315) perform circular motion around the gear of the executing main rod (5311).

8. A two-way water flow drilling rig for hydraulic slag removal and water accumulation cleaning as claimed in claim 6, characterized in that: The water supply pipe (4) is connected to the upper portion of the pumping operation chamber (522) via a pumping water inlet pipe (7), and a pumping water discharge pipe (8) is further provided below the pumping operation chamber (522); a first pumping valve (11) and a second pumping valve (12) are respectively installed on the pumping water inlet pipe (7) and the pumping water discharge pipe (8); The water supply pipe (4) is connected to the upper portion of the flushing operation chamber (523) via a flushing drainage pipe (9), and a flushing water inlet pipe (10) is further provided below the flushing operation chamber (523); a first flushing valve (13) and a second flushing valve (14) are respectively installed on the flushing drainage pipe (9) and the flushing water inlet pipe (10); The pump body (52) is further provided with a water supply pipe (15), the water supply pipe (15) being in communication with the pumping operation chamber (522) and the flushing operation chamber (523), respectively, and a water supply control valve (16) being installed on the water supply pipe (15).

9. A two-way water flow drilling rig for hydraulic slag removal and water accumulation cleaning as claimed in claim 8, characterized in that: A filter device (17) is installed on the water inlet pipe (7), and the filter device (17) includes a filter cylinder (171). Knife-edge filter leaves (172), swirl guide plates (173), punched pre-filters (174), and wedge-shaped wire filter layers (175) are sequentially arranged in the filter cylinder (171) along the filtering direction. The end of the filter device (17) close to the water supply pipe (4) is the water inlet end, and the end close to the pump body (52) is the water outlet end. The blade filter leaf (172) is composed of 12 blades, which are distributed in a circular shape at equal intervals on the inner wall of the filter cylinder (171) to cut and crush large-sized coal and rock debris entering the liquid; the swirl guide vane (173) is a 6-piece structure, which is arranged in a spiral manner along the inner wall of the filter cylinder (171), and the guide vane has an inclination angle of 20° to 35° relative to the cylinder axis, which guides the water flow into a rotating flow field to enhance the debris suspension effect and prevent sedimentation and clogging; The water supply pipe (4) is a three-layer composite structure pipe body; it comprises: an outer protective layer (41) made of wear-resistant rubber; The reinforcement layer (42) is a high-strength steel wire cross-woven structure; and an inner lining layer (43), which is integrally formed by a helical support spring and a thermoplastic polyurethane material through a hot-melt process.

10. A method for using a bidirectional water flow drilling rig for hydraulic slag removal and water accumulation cleaning, characterized in that: The steps include: Step A: Installing the machine. First, connect the two ends of the upper water pipe (4) to the two-way power water pump system (5) and the hollow drill rod (2), respectively. Meanwhile, install a drill bit (1) at the head of the hollow drill rod (2). Then, after starting the drilling rig body (100), the power head (200) drives the hollow drill rod (2) and the drill bit (1) to drill into the coal rock mass. Step B: When hydraulic slag removal is performed, the flushing mode is switched, and the fork assembly (531) is controlled to disengage the first spline hub (527) from the pumping impeller (524); at the same time, the hydraulic cylinder (532) is started to drive the piston rod to extend forward, pushing the flushing hub (530) to move, so that the flushing hub (530) and the second spline hub (528) are engaged, thereby completing the mechanical transmission connection between the pump shaft (526) and the flushing impeller (525); then the first flushing valve (13) and the second flushing valve (14) are closed, the water supply control valve (16) is opened, and water is injected into the flushing operation chamber (523), and then the water supply control valve (16) is closed to complete the pre-filling operation of the flushing operation chamber (523); then the drive motor (51) is started, and the pump shaft (526), ​​the second spline hub (528) and the flushing hub (530) are connected to the flushing impeller (525). 0) drives the flushing impeller (525) to rotate; then opens the first flushing valve (13), so that the water flow is sucked into the flushing operation chamber (523) of the pump body (52) under the action of the centrifugal force generated by the high-speed rotation of the flushing impeller (525); then slowly opens the second flushing valve (14), so that the high-pressure water flow is ejected through the upper water pipe (4), the drill pipe fluid channel of the hollow drill rod (2) and the conical diffusion nozzle of the drill bit (1), forming a directional high-pressure jet to impact the coal and rock debris layer on the hole wall, and finally the coal and rock debris are carried out from the bottom of the hole with the water flow through the annular gap between the hollow drill rod (2) and the hole wall, thereby realizing hydraulic slag discharge; wherein, the flushing impeller is composed of three flushing impellers (525) arranged in series along the rotating shaft, forming a superimposed fluid power output structure, and the water pressure is increased by fluid dynamics coupling to meet the high-efficiency slag discharge requirements under drilling conditions; Step C: When draining, switch the pumping mode. First, start the hydraulic cylinder (532) to retreat, so that the flushing wheel hub (530) and the second spline hub (528) are disengaged; at the same time, rotate the execution main rod (5311) of the fork assembly (531), drive the execution secondary rod (5312) to move axially through the gear transmission, thereby pushing the fork (5313) to move to a predetermined position, so that the first spline hub (527) is inserted into the pumping wheel hub (529), completing the mechanical connection between the pump shaft (526) and the pumping impeller (524); then open the first pumping valve (11), close the second pumping valve (12), open the water supply control valve (16), and add water to the pumping operation chamber (5 22) and then close the water supply control valve (16) to complete the pre-filling operation; start the driving motor (51) and drive the pumping impeller (524) to rotate at high speed through the pump shaft (526), ​​the first spline hub (527) and the pumping wheel hub (529); the pumping impeller (524) rotates to form a negative pressure zone in the pumping operation chamber (522), so that the water accumulated in the borehole flows into the hollow drill rod (2) through the drill bit (1) and enters the pumping operation chamber (522) of the pump body (52) through the upper water pipe (4) and the pumping water inlet pipe (7); slowly open the second pumping valve (12) to discharge the water from the pumping operation chamber (522), thereby realizing the extraction and discharge of the water in the borehole; Step C1: During the pumping process, the residual coal rock debris or impurities carried in the borehole water are subjected to multi-stage filtration treatment using the filter device (17) provided on the pumping water inlet pipe (7); the accumulated water first flows through the blade filter leaf (172) provided at the water inlet end of the filter cylinder (171), and the larger debris is crushed under the impact of the water flow, and preliminary filtration is achieved at the same time; the crushed coal rock debris enters the swirl guide plate (173) area with the water flow, and the water flow is rotated and guided and the disturbance is enhanced under the action of hydraulic force, so that the coal rock debris remains in a suspended state to prevent deposition and blockage; the water flow then enters the punched pre-filter (174) to perform secondary filtration on the debris with medium particle size; finally, the water flow is finely filtered through the wedge wire filter layer (175) to achieve the final interception of fine particles; The filtering process forms a graded filtering structure and a continuous filtering barrier, effectively preventing impurities from entering the pump body (52), thereby improving the reliability of the pumping operation and the service life of the equipment; and the filtering device (17) is a detachable structure, and by removing the flange clamps provided at both ends of the filter cylinder (171), the filtering device (17) can be quickly disassembled, replaced, and internally cleaned and maintained; Step C2: When abnormal conditions such as poor drainage, water pressure fluctuations, or insufficient orifice return flow occur during continuous pumping, the following emergency treatment steps are included: first, turn off the pumping mode and switch to the high-pressure flushing mode; start the drive motor (51) to drive the flushing impeller (525) to rotate at high speed, and flush the blockage in the water flow channel with high-pressure water flow; after continuous flushing for 20 to 30 seconds, switch to the pumping mode again; if blockage still exists during the pumping process, repeat the flushing and pumping operations 1 to 3 times to form a closed-loop working cycle of flushing-pumping-flushing to ensure that the water flow channel is completely unblocked.

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