High-pressure large-flow multi-channel rotary joint and coal mine drilling machine

Abstract

This invention discloses a high-pressure, high-flow-rate, multi-channel rotary joint, comprising: an outer shell, a rotating cavity formed thereon on the outer shell, an inner shaft disposed within the rotating cavity; a rotating oil passage formed between the inner shaft and the outer shell, a plurality of oil passage openings communicating with the rotating oil passage on the outer shell, and a support member disposed within the rotating oil passage. This high-pressure, high-flow-rate, multi-channel rotary joint, by providing a support member within the rotating oil passage, can form multi-point radial constraints between the inner shaft and the outer shell, effectively counteracting the radial force of high-pressure oil pressure on the inner shaft, suppressing deflection deformation in the middle of the shaft, maintaining rotational coaxiality, and fundamentally avoiding unilateral seal wear and oil passage cross-contamination problems caused by shaft sway. This significantly improves the high-pressure bearing capacity and sealing reliability of the joint, ensuring the stability of continuous high-flow-rate delivery of multiple hydraulic media.

Description

Technical Field

[0001] This invention relates to the technical field of coal mine drilling rigs, and more particularly to a high-pressure, high-flow-rate multi-channel rotary joint and a coal mine drilling rig. Background Technology

[0002] In hydraulic equipment with rotary actuators, such as coal mine drilling rigs and construction machinery, multi-channel rotary joints are the core components for transmitting power between the fixed-side hydraulic source and the rotating-side actuator. They need to simultaneously carry multiple hydraulic media with different pressures and flow rates continuously. As downhole drilling upgrades towards higher torque, higher pressure, and higher flow rates, conventional multi-channel rotary joints are gradually showing performance shortcomings: the internal shaft is supported only by bearings at both ends, and there is no radial support structure in the rotating oil circuit area. Under the continuous action of high-pressure oil, radial deflection deformation is easily generated in the middle of the internal shaft, causing shaft wobble, one-sided wear of the sealing surface, and consequently, cross-contamination and leakage between different oil circuits, making it impossible to stably withstand high-pressure conditions for a long time.

[0003] Existing rotary joints with internal supports mostly adopt a simple, evenly spaced support layout, which cannot match the stress distribution characteristics of the inner shaft. The support strength in the central load concentration area is insufficient, and the deflection control effect is very limited. Moreover, the support structure is mostly a hard metal contact, lacking buffering, vibration reduction, and self-lubricating design. During high-speed rotation, wear is rapid, temperature rises, and the service life of the seals is significantly shortened. In addition, most of them adopt an integral shell structure, which makes disassembly and maintenance difficult after the internal support and seals are damaged. They are difficult to adapt to the rapid operation and maintenance needs of the confined space in coal mines, directly restricting the efficiency of drilling operations. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the current high-pressure, high-flow, multi-channel rotary joints and coal mine drilling rigs, this invention is proposed.

[0006] Therefore, the purpose of this invention is to provide a high-pressure, high-flow-rate, multi-channel rotary joint and a coal mine drilling rig.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a high-pressure, high-flow, multi-channel rotary joint, comprising: an outer shell, a rotary cavity formed on the outer shell, an inner shaft disposed within the rotary cavity; a rotary oil passage formed between the inner shaft and the outer shell, a plurality of oil passage openings communicating with the rotary oil passage being formed on the outer shell, and a support member disposed within the rotary oil passage.

[0008] As a preferred embodiment of the high-pressure, high-flow, multi-channel rotary joint of the present invention, the support member includes a plurality of convex rings disposed on the inner wall of the rotating cavity, the convex rings having annular grooves, buffer rings being disposed in the annular grooves, the spacing between the plurality of buffer rings gradually decreasing from the end of the outer shell to the center of the outer shell, and a gap being formed between the convex rings and the inner shaft.

[0009] As a preferred embodiment of the high-pressure, high-flow, multi-channel rotary joint of the present invention, wherein: a baffle is provided at one end of the inner shaft, a stepped ring is provided near the baffle of the inner shaft, an extension ring extends from the outer shell near the stepped ring, and a bearing is provided between the extension ring and the stepped ring.

[0010] As a preferred embodiment of the high-pressure, high-flow, multi-channel rotary joint of the present invention, the inner shaft body is provided with a protrusion at the other end, the outer shell body is provided with a connecting flange near the protrusion, the connecting flange and the outer shell body are bolted together, a bearing is also provided between the protrusion and the outer shell body, the inner shaft body is provided with a through hole, and the connecting flange is provided with a mating ring hole that mates with the through hole.

[0011] The present invention also includes a coal mine drilling rig with a high-pressure, high-flow-rate, multi-channel rotary joint, comprising: a vehicle body assembly, including a vehicle body, a drive component mounted on the vehicle body, and a control console mounted on the vehicle body; the drive component includes a drive wheel mounted on the lower end of the vehicle body, a plurality of traveling wheels mounted on the lower end of the vehicle body, and traveling tracks mounted outside the traveling wheels and the drive wheel; the traveling wheels are provided with protective covers; a support assembly, including a support component mounted on the vehicle body and an upper support component mounted on the vehicle body; and a drilling assembly, including a steering component mounted on the vehicle body and a drilling component mounted on the steering component.

[0012] In a preferred embodiment of the coal mine drilling rig of the present invention, the steering component includes a rotating groove formed on the vehicle body, a rotating disk body rotatably connected in the rotating groove, and a driving component disposed in the rotating groove; the upper support component includes an upper support cylinder disposed on the rotating disk body and an upper top column body slidably connected in the upper support cylinder; a top plate is provided at the upper end of the upper top column body; an mounting bracket is connected between the upper support cylinders; and the support component includes a plurality of lower support columns disposed on the vehicle body and a lower support rod slidably connected to the lower support columns.

[0013] As a preferred embodiment of the coal mine drilling rig of the present invention, the drilling component includes a drilling bracket mounted on a rotating disk, a drilling body slidably connected to the drilling bracket, and a drill bit block detachably mounted on the drilling body. The drill bit block has holes for mounting drill bits, and a locking component is provided between the drilling body and the drill bit block.

[0014] The main body of the drill bit is provided with a number of coolant pipes arranged in a circular array. Each coolant pipe is slidably connected to a locking pipe joint. The drill bit block is provided with a matching pipe that mates with the locking pipe joint.

[0015] In a preferred embodiment of the coal mine drilling rig of the present invention, the locking component includes a ring frame disposed within the drilling body, a plurality of connecting cylinders disposed on the ring frame, a drive rod slidably connected to the connecting cylinders, a drive center rotatably connected to the ring frame, and a drive ring eccentrically rotatably connected to the drive center. Each drive rod has a support rod hinged to its rear end, and the support rod is rotatably connected to the drive ring. Each connecting cylinder is provided with a corresponding locking pipe joint. The drive rod is provided with a first inclined block, and each locking pipe joint has a second inclined block at its lower end that cooperates with the first inclined block. The drive center is driven by a motor.

[0016] In a preferred embodiment of the coal mine drilling rig of the present invention: a retaining ring is provided at the end of the connecting cylinder, a plurality of sliding retaining strips are provided radially on the retaining ring, a first spring is provided between the sliding retaining strips and the retaining ring, a bar is provided at the end of the driving rod, a connecting hemisphere is provided at the end of the bar, a concave annular groove is provided on the driving rod near the connecting hemisphere, a collar is slidably connected in the concave annular groove, a protruding structure is formed on the outer circumferential surface of the collar, a third inclined surface is provided on the sliding retaining strip, an inclined ring platform is provided on the side of the concave annular groove away from the connecting hemisphere, and a second spring is provided between the collar and the inclined ring platform.

[0017] In a preferred embodiment of the coal mine drilling rig of the present invention, the support rod includes a first section and a second section, a third spring is provided between the first section and the second section, the first section is connected to the drive rod, and a hinge joint is provided at the end of the second section.

[0018] The beneficial effects of this invention are as follows: The high-pressure, high-flow, multi-channel rotary joint of this invention, by setting a support member in the rotating oil circuit, can form multi-point radial constraints between the inner shaft and the outer shell, effectively counteracting the radial force of high-pressure oil on the inner shaft, suppressing the deflection deformation in the middle of the shaft, maintaining the coaxiality of rotation, and fundamentally avoiding the problem of one-sided wear of the seal and oil circuit cross-contamination caused by shaft wobble, significantly improving the high-pressure bearing capacity and sealing reliability of the joint, and ensuring the stability of continuous high-flow-rate delivery of multi-channel hydraulic media.

[0019] This support structure can be designed in conjunction with the annular partition structure of the rotating oil circuit, combining the dual functions of oil circuit partitioning and radial load bearing, thereby improving the overall structural rigidity without adding additional internal components. The support can effectively buffer the vibration and impact during rotation, reduce hard contact wear of metal parts, and at the same time assist in forming a fluid lubrication effect, reducing operating temperature rise and extending the continuous operation cycle of the equipment. It can also reduce the incidence of internal failures, reduce the frequency and difficulty of downhole maintenance, adapt to the long-term stable operation requirements in harsh working conditions such as coal mines, and improve the overall operating efficiency of the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of the high-pressure, high-flow-rate, multi-channel rotary joint of the present invention.

[0022] Figure 2 This is a cross-sectional schematic diagram of the high-pressure, high-flow-rate, multi-channel rotary joint of the present invention.

[0023] Figure 3 This is a schematic diagram of the explosion state of the high-pressure, high-flow, multi-channel rotary joint of the present invention.

[0024] Figure 4 This is a schematic diagram of the internal structure of the high-pressure, high-flow-rate, multi-channel rotary joint of the present invention.

[0025] Figure 5 This is a schematic diagram of the overall structure of the coal mine drilling rig of the present invention.

[0026] Figure 6 This is a cross-sectional schematic diagram of the overall structure of the coal mine drilling rig of the present invention.

[0027] Figure 7 This is a schematic diagram of the drilling support for the coal mine drilling rig of the present invention.

[0028] Figure 8 This is a cross-sectional schematic diagram of the locking component of the coal mine drilling rig of the present invention.

[0029] Figure 9 The coal mine drilling rig of the present invention Figure 8 Enlarged diagram of part A in the middle.

[0030] Figure 10 This is a schematic diagram of the locking component of the coal mine drilling rig of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 100, outer shell; 101, rotating cavity; 102, inner shaft; 103, rotating oil passage; 104, oil passage opening; 105, support component; 1051, convex ring; 1052, annular groove; 1053, buffer ring; 106, baffle; 107, stepped ring; 108, extension ring; 109, bearing component; 200, protrusion; 201, connecting flange; 202, perforation; 203, mating ring hole; 300, vehicle body assembly; 301, vehicle body; 303, drive component; 302, control console; 3031, drive wheel; 3032, traveling wheel; 3033, traveling track; 304, support component; 305, upper support component; 306, steering component; 307, drilling component; 3061, rotating groove; 3062, rotating disk. 3063, Drive component; 3051, Upper support cylinder; 3052, Upper top column; 3053, Top plate; 3054, Mounting bracket; 3041, Lower support column; 3042, Lower support rod; 3071, Drilling bracket; 3072, Drilling body; 3073, Drill bit block; 308, Coolant pipeline; 309, Locking pipe joint; 3091, Matching pipeline; 400, Locking component; 401, Ring frame; 402, Connecting cylinder; 403, Drive rod; 4031, Bar rod; 404, Drive center; 405, Drive ring body; 406, Support rod; 407, First inclined block; 408, Second inclined block; 500, Snap ring; 501, Sliding snap bar; 502, First spring; 503, Connecting hemisphere; 504, Concave ring groove; 505, Collar ring. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0035] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0036] Example 1

[0037] Reference Figures 1-4 This is the first embodiment of the present invention, which provides a high-pressure, high-flow-rate, multi-channel rotary joint. The rotary joint can realize the continuous rotary conveying of multi-channel hydraulic media under high-pressure and high-flow-rate conditions and has strong pressure resistance.

[0038] Furthermore, the high-pressure, high-flow, multi-channel rotary joint includes a housing 100, on which a rotating cavity 101 is formed, and an inner shaft 102 is disposed within the rotating cavity 101; a rotating oil passage 103 is formed between the inner shaft 102 and the housing 100, and the housing 100 has several oil passage ports 104 communicating with the rotating oil passage 103, and a support member 105 is disposed within the rotating oil passage 103; the housing 100 is the external load-bearing structure of the joint, forged from high-strength alloy steel, and subjected to overall heat treatment, capable of withstanding high-pressure loads and impacts. Load; the inner shaft 102 can rotate relative to the outer shell 100, realizing continuous oil circuit connection between the fixed side pipeline and the rotating side actuator; several oil circuit ports 104 are arranged in layers along the circumference and axial direction of the outer shell 100, respectively corresponding to the oil inlet, oil return and control oil circuits of different pressure levels, forming a multi-channel independent circuit, which can simultaneously deliver hydraulic medium to multiple actuators such as rotation, feed and support of the drilling rig; the support member 105 forms radial support for the inner shaft 102, ensuring the coaxiality of the rotation of the inner shaft 102, and avoiding the inner shaft wobble under high pressure conditions that leads to seal failure.

[0039] Furthermore, the support member 105 includes several convex rings 1051 disposed on the inner wall of the rotating cavity 101. Each convex ring 1051 has an annular groove 1052, and a buffer ring 1053 is disposed within the annular groove 1052. The spacing between the buffer rings 1053 gradually decreases from the end of the outer shell 100 to the center of the outer shell 100, forming a gap between the convex rings 1051 and the inner shaft 102. The convex rings 1051 are integrally formed with the inner wall of the outer shell 100, serving both oil passage separation and radial support functions. Adjacent convex rings 1051 form independent annular oil chambers, corresponding to one rotating oil passage 103, effectively preventing cross-contamination between oil passages of different pressures. Compared to traditional independent sealing ring separation structures, the integrated convex ring structure has higher rigidity and smaller pressure deformation, maintaining a stable fit clearance even under high-pressure conditions. The buffer ring 1053 is made of polytetrafluoroethylene or copper-based oil-impregnated alloy, possessing excellent self-lubricating properties and wear resistance. Embedded within the ring groove 1052, it achieves axial positioning and absorbs radial impact and vibration during the rotation of the inner shaft 102, reducing the dynamic load on the shaft and mitigating hard contact wear between metal components. Compared to the traditional equal-spacing support layout, this embodiment employs a gradually decreasing spacing design from both ends towards the center. This allows the support density to gradually increase along the central area where the load is concentrated, effectively balancing the radial deflection of the inner shaft 102, preventing excessive bending deformation in the middle due to oil pressure, and thus preventing uneven wear on the sealing surface, significantly extending the service life of the seal. The tiny gap reserved between the inner diameter of the convex ring 1051 and the outer diameter of the inner shaft 102 can retain hydraulic oil and form a hydrodynamic oil film during operation. On the one hand, it provides fluid lubrication for the inner shaft 102, significantly reducing the coefficient of rotational friction and operating temperature rise, and is suitable for high-speed continuous operation. On the other hand, the oil film itself has a throttling and sealing effect, which can help reduce the leakage of oil circuit and reduce the pressure load on the main seal.

[0040] Furthermore, a baffle 106 is provided at one end of the inner shaft 102, and a stepped ring 107 is provided near the baffle 106 on the inner shaft 102. An extension ring 108 extends from the outer shell 100 near the stepped ring 107, and a bearing component 109 is provided between the extension ring 108 and the stepped ring 107. The baffle 106 and the stepped ring 107 form a bidirectional axial limiting structure, which can limit the axial movement of the inner shaft 102 under high pressure, and avoid oil circuit misalignment and seal failure caused by shaft displacement. The extension ring 108 provides an independent mounting chamber for the bearing component 109, which is separated from the hydraulic oil chamber, preventing impurities in the hydraulic oil from entering the bearing and causing abrasive wear, thus extending the service life of the bearing. The bearing component 109 adopts angular contact ball bearings or tapered roller bearings, which can simultaneously bear radial loads and axial loads. The bearings arranged symmetrically at both ends form a double-support structure, which greatly improves the rotational coaxiality of the inner shaft 102, ensuring that the inner shaft 102 operates smoothly under high pressure and high flow conditions, and the radial runout is controlled within a very small range.

[0041] Preferably, the inner shaft 102 has a protrusion 200 at the other end, and the outer casing 100 has a connecting flange 201 near the protrusion 200. The connecting flange 201 is bolted to the outer casing 100, and a bearing 109 is also provided between the protrusion 200 and the outer casing 100. The inner shaft 102 has a through hole 202, and the connecting flange 201 has a mating ring hole 203 that mates with the through hole 202. The connecting flange 201 adopts a detachable bolted connection structure. Compared with the traditional integral welded casing, the inside of the joint can be quickly opened without disassembling the external pipeline for inspection and replacement of vulnerable parts such as the buffer ring 1053 and seals, which greatly reduces the maintenance difficulty and downtime of the downhole equipment. The perforations 202 are evenly distributed along the circumference of the inner shaft 102. Each perforation 202 corresponds to an independent annular oil cavity and oil passage 104, forming multiple sets of completely independent oil passages. This allows for the simultaneous delivery of multiple hydraulic media with different pressures and flow rates, meeting the synchronous oil supply needs of multiple actuators such as drilling rig rotation, feeding, and clamping. The annular holes 203 correspond one-to-one with the perforations 202, ensuring precise connection of the oil passages on the rotating side, without throttling or pressure drop, and guaranteeing flow efficiency under high flow conditions.

[0042] Example 2

[0043] Reference Figure 5-10 The present invention also provides a coal mine drilling rig, including a body assembly 300, a support assembly and a drilling assembly. The body assembly 300 provides a foundation for the drilling rig to travel and bear loads, the support assembly is used to stabilize the machine body during operation, and the drilling assembly performs drilling operations. The three work together to achieve efficient underground drilling construction.

[0044] Furthermore, the vehicle body assembly 300 includes a vehicle body 301, a drive component 303 mounted on the vehicle body 301, and a control console 302 mounted on the vehicle body 301. The drive component 303 includes a drive wheel 3031 mounted on the lower end of the vehicle body 301, several traveling wheels 3032 mounted on the lower end of the vehicle body 301, and traveling tracks 3033 mounted outside the traveling wheels 3032 and the drive wheels 3031. Protective covers are provided on the traveling wheels 3032. The vehicle body 301 is a high-strength welded frame structure, adapted to the harsh underground environment. The drive wheels 3031 provide walking power, the traveling wheels 3032 provide auxiliary support and guidance, and the traveling tracks 3033 increase the ground contact area and reduce the ground pressure, enabling smooth travel on soft and uneven underground surfaces. The protective covers are installed on the outside of the traveling wheels 3032 to prevent coal gangue and mud from intruding and extend the service life of the traveling components. The control console 302 integrates the control units for walking, support, and drilling, facilitating centralized control by operators.

[0045] Furthermore, the support components include a support component 304 mounted on the vehicle body 301 and an upper support component 305 mounted on the vehicle body 301; the support component 304 supports the ground downwards, and the upper support component 305 pushes against the tunnel roof upwards. The bidirectional support can greatly improve the stability of the drilling rig during operation, prevent the rig from shaking during drilling, and ensure drilling accuracy.

[0046] Preferably, the steering component 306 includes a rotating groove 3061 formed on the vehicle body 301, a rotating disk 3062 rotatably connected in the rotating groove 3061, and a driving component 3063 disposed in the rotating groove 3061; the upper support component 305 includes an upper support cylinder 3051 disposed on the rotating disk 3062, an upper top column 3052 slidably connected in the upper support cylinder 3051, a top plate 3053 disposed at the upper end of the upper top column 3052, and a mounting bracket 3054 connected between the upper support cylinders 3051; the support component 304 includes a plurality of lower support columns 304 disposed on the vehicle body 301. 1. A lower support rod 3042 is slidably connected to the lower support column 3041; a rotating groove 3061 provides installation space for the rotating disk 3062, and a driving component 3063 can drive the rotating disk 3062 to rotate and adjust the orientation angle of the drilling; an upper support cylinder 3051 provides sliding guidance for the upper top column 3052, and the top plate 3053 increases the contact area with the top plate 3053 to avoid local stress concentration; a mounting bracket 3054 can fix auxiliary pipelines and components to improve the integration of the whole machine; the lower support column 3041 and the lower support rod 3042 can extend and adjust the support height to adapt to different ground heights, and the support is stable and reliable.

[0047] Furthermore, the drilling assembly includes a drilling bracket 3071 mounted on the rotating disk 3062, a drilling body 3072 slidably connected to the drilling bracket 3071, and a drill bit block 3073 detachably mounted on the drilling body 3072. The drill bit block 3073 has holes for mounting the drill bit, and a locking component 400 is provided between the drilling body 3072 and the drill bit block 3073. The drilling bracket 3071 provides a feed guide for the drilling body 3072, which can slide along the bracket to achieve drilling feed. The drill bit block 3073 has a modular structure and can be quickly replaced according to the drilling specifications to adapt to different drilling needs. The locking component 400 can quickly lock and unlock the drill bit block 3073, making replacement convenient and reducing downtime.

[0048] Preferably, the borehole body 3072 is provided with a plurality of coolant pipes 308 arranged in a circumferential array, and each coolant pipe 308 is slidably connected to a locking pipe joint 309. The drill bit block 3073 is provided with a mating pipe 3091 that mates with the locking pipe joint 309. The multiple sets of coolant pipes 308 are arranged in a circular pattern, which can uniformly deliver coolant and flushing medium to the drill bit, thereby cooling the drill bit and removing rock cuttings, ensuring continuous drilling operations. The locking pipe joint 309 can slide and extend along the pipes, and lock with the mating pipe 3091 of the drill bit block 3073, ensuring a reliable seal and preventing high-pressure coolant leakage.

[0049] Furthermore, the locking component 400 includes a ring frame 401 disposed within the drilling body 3072, a plurality of connecting cylinders 402 disposed on the ring frame 401, a drive rod 403 slidably connected within the connecting cylinders 402, a drive center 404 rotatably connected within the ring frame 401, and a drive ring 405 eccentrically rotatably connected to the drive center 404. Each drive rod 403 has a support rod 406 hinged to its rear end, and the support rod 406 is rotatably connected to the drive ring 405. Each connecting cylinder 402 is provided corresponding to each locking tube joint 309. A first inclined block 407 is provided on the drive rod 403, and a second inclined block 408 that cooperates with the first inclined block 407 is provided at the lower end of each locking tube joint 309.

[0050] The ring frame 401 is equipped with a motor that drives the rotation of the drive center 404. The ring frame 401 provides a mounting support for the locking mechanism. The rotation of the drive center 404 drives the drive ring body 405 to rotate eccentrically, which in turn drives all the drive rods 403 to extend and retract synchronously through the support rod 406. When the drive rods 403 are pushed forward, the first inclined block 407 and the second inclined block 408 cooperate to convert the axial movement into radial movement, pushing the locking pipe joint 309 to extend outward and lock with the mating pipe 3091. The synchronous operation of multiple joints results in high docking efficiency, uniform force distribution, and good sealing consistency.

[0051] Preferably, a bar 4031 is provided at the end of the drive rod 403, a retaining ring 500 is provided inside the connecting cylinder 402, a plurality of sliding retaining strips 501 are provided radially on the retaining ring 500, a first spring 502 is provided between the sliding retaining strips 501 and the retaining ring 500, a connecting hemisphere 503 is provided at the end of the drive rod 403, a concave annular groove 504 is provided on the drive rod 403 near the connecting hemisphere 503, and a collar 505 is slidably connected in the concave annular groove 504. The outer circumferential surface of the collar 505 protrudes, and a third inclined surface is provided on the sliding retaining strip 501. An inclined ring platform is provided on the side of the concave ring groove 504 away from the connecting hemisphere 503. A second spring is provided between the collar 505 and the inclined ring platform. When the drive rod 403 is pushed to the locking position, the sliding retaining strip 501 is engaged in the concave ring groove 504 under the action of the first spring 502, forming a mechanical self-locking mechanism. This can resist the back thrust generated by the high pressure of the pipeline, prevent the joint from loosening, and improve the performance under high pressure conditions. Connection reliability; during unlocking, the drive rod 403 continues to push forward, synchronously driving the collar 505 to slide. When it moves to the position of the sliding locking strip 501, because the collar 505 protrudes outward, the third inclined surface pushes the sliding locking strip 501 towards the locking ring 500. Then the drive rod 403 continues to move forward, at which point the sliding locking strip 501 moves to the end of the collar 505 away from the connecting hemisphere 503. Then the drive rod 403 moves backward, at which point the collar 505 is held in place by the two sliding locking strips. 501 is locked, thus moving on bar 4031. When collar 505 moves to the position of connecting hemisphere 503, collar 505 is blocked. At this time, the two sliding locking bars 501 are pushed towards the locking ring 500 under the protruding structure of collar 505. Then collar 505 is unlocked, thereby driving connecting hemisphere 503 to move backward with drive rod 403, thus realizing unlocking. The action is smooth and the operation is convenient. The second spring provides restoring force for collar 505.

[0052] Furthermore, the support rod 406 includes a first section and a second section, with a third spring between the first and second sections. The first section is connected to the drive rod 403, and a hinge joint is provided at the end of the second section. The segmented support rod 406, together with the third spring, forms a buffer structure that can absorb impact loads when locked, avoid damage to the pipe joints from hard contact, and compensate for processing and assembly errors, ensuring that multiple sets of locking pipe joints 309 are in place synchronously and that the sealing pressure is uniform.

[0053] Operation process: During rotary joint assembly, the inner shaft 102 is inserted into the rotating cavity 101 of the outer shell 100, and bearings 109 and connecting flanges 201 are installed at both ends. The buffer ring 1053 is embedded in the annular groove 1052 of the convex ring 1051 to form a multi-support structure. During operation, the outer shell 100 is fixed, and the inner shaft 102 rotates synchronously with the rotating component. Multiple hydraulic media enter the rotating oil passage 103 from different oil passage ports 104, and are delivered to the corresponding actuator through the through hole 202 and mating ring hole 203 of the inner shaft 102. The support 105 and the buffer ring 1053 jointly bear the radial load, maintain the coaxiality of the inner shaft, and the oil film in the gap achieves self-lubrication, ensuring long-term stable operation under high pressure and high flow.

[0054] During coal mine drilling operations, the operator controls the vehicle assembly 300 to travel to the work site via the control console 302, extends the lower support rod 3042 to support the ground, and then drives the upper top column 3052 to rise, so that the roof plate 3053 is pressed against the roadway roof, thus stabilizing the machine body; the angle of the rotating disc 3062 is adjusted by the steering component 306 to determine the drilling orientation; the drill bit block 3073 with the corresponding drill bit is installed into the end of the drilling body 3072, and the locking component 400 is driven to move, driving the ring body 405 to rotate eccentrically and push the drive rod 403 forward. The inclined surface cooperates to drive the locking pipe joint 309 to extend, so that each coolant pipe 308 slides forward and connects and locks with the matching pipe 3091. At the same time, the self-locking structure engages and positions, ensuring reliable connection; the drilling body 3072 is started to feed along the drilling support 3071 to carry out drilling operations. Coolant is continuously delivered to the drill bit through the pipeline to cool and remove slag.

[0055] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0056] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0057] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A high-pressure, high-flow-rate, multi-channel rotary joint, characterized in that: include: The outer shell (100) has a rotating cavity (101) and an inner shaft (102) is provided inside the rotating cavity (101). A rotating oil passage (103) is formed between the inner shaft (102) and the outer shell (100). The outer shell (100) has several oil passage openings (104) that communicate with the rotating oil passage (103). A support member (105) is provided inside the rotating oil passage (103).

2. The high-pressure, high-flow-rate, multi-channel rotary joint as described in claim 1, characterized in that: The support member (105) includes a plurality of convex rings (1051) disposed on the inner wall of the rotating cavity (101). The convex rings (1051) are provided with annular grooves (1052). Buffer rings (1053) are disposed in the annular grooves (1052). The spacing between the plurality of buffer rings (1053) gradually decreases from the end of the outer shell (100) to the center of the outer shell (100). A gap is formed between the convex rings (1051) and the inner shaft (102).

3. The high-pressure, high-flow-rate, multi-channel rotary joint as described in claim 2, characterized in that: The inner shaft (102) has a baffle (106) at one end, and a stepped ring (107) is provided near the baffle (106) of the inner shaft (102). An extension ring (108) extends from the outer shell (100) near the stepped ring (107), and a bearing (109) is provided between the extension ring (108) and the stepped ring (107).

4. The high-pressure, high-flow-rate, multi-channel rotary joint as described in claim 3, characterized in that: The inner shaft (102) has a protrusion (200) at the other end. The outer shell (100) has a connecting flange (201) near the protrusion (200). The connecting flange (201) is bolted to the outer shell (100). A bearing (109) is also provided between the protrusion (200) and the outer shell (100). The inner shaft (102) has a through hole (202). The connecting flange (201) has a mating ring hole (203) that mates with the through hole (202).

5. A coal mine drilling rig having a high-pressure, high-flow-rate, multi-channel rotary joint as described in any one of claims 1-4, characterized in that: include, The vehicle body assembly (300) includes a vehicle body (301), a drive component (303) disposed on the vehicle body (301), and a control console (302) disposed on the vehicle body (301). The drive component (303) includes a drive wheel (3031) disposed at the lower end of the vehicle body (301), a plurality of travel wheels (3032) disposed at the lower end of the vehicle body (301), and travel tracks (3033) disposed outside the travel wheels (3032) and the drive wheels (3031). The travel wheels (3032) are provided with protective covers. The support assembly includes a support member (304) disposed on the vehicle body (301) and an upper support member (305) disposed on the vehicle body (301). The drilling assembly includes a steering component (306) disposed on the vehicle body (301) and a drilling component (307) disposed on the steering component (306).

6. The coal mine drilling rig as described in claim 5, characterized in that: The steering component (306) includes a rotating groove (3061) formed on the vehicle body (301), a rotating disk (3062) rotatably connected in the rotating groove (3061), and a driving component (3063) disposed in the rotating groove (3061). The upper support component (305) includes an upper support cylinder (3051) disposed on the rotating disk (3062) and an upper top column (3052) slidably connected in the upper support cylinder (3051). A top plate (3053) is provided at the upper end of the upper top column (3052). A mounting bracket (3054) is connected between the upper support cylinders (3051). The support component (304) includes a plurality of lower support columns (3041) disposed on the vehicle body (301) and a lower support rod (3042) slidably connected to the lower support columns (3041).

7. The coal mine drilling rig as described in claim 6, characterized in that: The drilling component (307) includes a drilling bracket (3071) mounted on a rotating disk (3062), a drilling body (3072) slidably connected to the drilling bracket (3071), and a drill bit block (3073) detachably mounted on the drilling body (3072). The drill bit block (3073) has holes for mounting drill bits, and a locking component (400) is provided between the drilling body (3072) and the drill bit block (3073). The drilling body (3072) is provided with a number of coolant pipes (308) arranged in a circumferential array. Each coolant pipe (308) is slidably connected to a locking pipe joint (309). The drill bit block (3073) is provided with a matching pipe (3091) that mates with the locking pipe joint (309).

8. The coal mine drilling rig as described in claim 7, characterized in that: The locking component (400) includes a ring frame (401) disposed in the drilling body (3072), a plurality of connecting cylinders (402) disposed on the ring frame (401), a drive rod (403) slidably connected in the connecting cylinder (402), a drive center (404) rotatably connected in the ring frame (401), and a drive ring (405) eccentrically rotatably connected in the drive center (404). Each drive rod (403) has a support rod (406) hinged to its rear end. The support rod (406) is rotatably connected to the drive ring (405). Each connecting cylinder (402) is provided corresponding to each locking pipe joint (309). The drive rod (403) is provided with a first inclined block (407). Each locking pipe joint (309) has a second inclined block (408) at its lower end that cooperates with the first inclined block (407). The drive center (404) is driven by a motor.

9. The coal mine drilling rig as described in claim 8, characterized in that: The end of the connecting cylinder (402) is provided with a retaining ring (500), and a plurality of sliding retaining strips (501) are provided radially on the retaining ring (500). A first spring (502) is provided between the sliding retaining strips (501) and the retaining ring (500). The end of the driving rod (403) is provided with a bar (4031), and the end of the bar (4031) is provided with a connecting hemisphere (503). A concave annular groove (504) is provided near the connecting hemisphere (503) on the driving rod (403). A collar (505) is slidably connected in the concave annular groove (504). The outer circumferential surface of the collar (505) forms a protruding structure. A third inclined surface is provided on the sliding retaining strips (501). An inclined ring platform is provided on the side of the concave annular groove (504) away from the connecting hemisphere (503). A second spring is provided between the collar (505) and the inclined ring platform.

10. The coal mine drilling rig as described in claim 8, characterized in that: The support rod (406) includes a first section and a second section, a third spring is provided between the first section and the second section, the first section is connected to the drive rod (403), and a hinge joint is provided at the end of the second section.

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