Omnidirectional stirring drill bit with passive autorotation blades and working method

Abstract

The invention provides an omni-directional stirring drill bit with passive autorotation blades and a working method, relates to the field of stirring drill bits, and aims to solve the problem that the mixing uniformity cannot be guaranteed due to the fact that the blades of the stirring drill bit are poor in adaptability and easy to block when a drill rod rotates to drive the blades to move, a rotating shaft at the front edges of the blades faces the rotating direction of the drill rod, and the rear edges of the blades are blade parts. When the drill rod rotates forwards or backwards, the acting force of external materials on the blade parts can push the blades to rotate around the rotating shaft. The flow channel openings are located in the sides, away from the rotating shaft, of the blade parts, and the blades can rotate along with the drill rod and automatically rotate to adjust the positions. In the forward rotation, reverse rotation, lifting or downward drilling process of the drill rod, the blades rotate to enable the position and the direction of the flow channel opening to change in a self-adaptive mode. The rotation of the blades can make the runner port keep away from the direct pressure direction of external materials as much as possible, so that internal materials are discharged from the position with relatively small pressure, the extrusion pressure is reduced, the energy consumption is reduced, meanwhile, the blockage of the materials to hole sites is reduced, and the mixing uniformity of the materials is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stirring drill bits, in particular to a passive self-rotating blade omnidirectional stirring drill bit and working method. BACKGROUND

[0002] By setting a material conveying channel inside the drill bit, the internal material can be conveyed to the drill bit blade when the drill bit rotates, so that the internal material is discharged from the position close to the blade and mixed with the external material acted on by the drill bit. Under the rotation and movement of the drill bit, the blade of the drill bit stirs the internal material and the external material discharged by the drill bit, and can also promote physical reaction or chemical reaction between the materials according to the requirement, and is applied to technical scenes such as chemical synthesis, mineral processing, pharmaceutical granulation, food processing, environmental protection treatment and civil construction.

[0003] In the process of supplying and stirring mixing the material by the drill bit, the density of the external material is different from the density of the internal material conveyed by the drill bit. When the density of the external material is large, the nearby material will generate pressure on the drill bit. When the drill bit rotates in a single direction, the internal material can be output at the tail end of the blade, so as to reduce the extrusion pressure of the internal material. When the drill bit reverses, the output position of the internal material is directed to the position of the acting external material, so that the required extrusion pressure of the internal material is increased, and the hole of the blade outputting the internal material is also easily blocked. Some solutions in the prior art can meet the demand of multidirectional stirring. The blade is installed on the drill rod, and the rotation of the blade is used to assist in breaking the soil and reducing the volume of the soil block. However, the resistance of the blade in the process of forward rotation and reverse rotation, upward lifting and downward drilling is not considered, and only good stirring effect can be achieved in the process of unidirectional rotation and unidirectional feeding. However, it is difficult to meet the mixing demand in the process of reverse rotation or upward lifting, and the resistance of the blade is large and the energy consumption is high in the process of supplying and stirring the material by the whole stirring drill bit. The adaptability of the blade is poor, the channel of the blade outputting the internal material is easily blocked, and the uniformity of the mixture cannot be guaranteed. SUMMARY

[0004] The present application aims at the defects in the prior art, and provides a passive self-rotating blade omnidirectional stirring drill bit and working method. When the drill rod rotates to drive the blade to move, the front edge of the blade is directed to the rotation direction of the drill rod, and the rear edge of the blade is a blade part. When the drill rod rotates forward or reversely, the force of the external material acting on the blade part can drive the blade to rotate around the rotation shaft. When the density of the external material is large, no matter the rotation direction of the drill rod, the self-rotation of the blade can make the flow channel port avoid the direct pressure direction of the external material as much as possible, so that the internal material is discharged from the position with relatively small pressure, the extrusion pressure is reduced, the energy consumption is reduced, the blockage of the hole by the material is reduced, and the uniformity of the mixture is guaranteed.

[0005] The first object of the present application is to provide a passive autorotation blade omnidirectional stirring drill bit, which adopts the following scheme: Comprise: A drill rod, which is internally hollow to form a drill rod flow passage; A blade, which comprises a rotating shaft and a blade part connected thereto, the rotating shaft axis is distributed at an angle with the drill rod axis, the blade part is rotationally connected to the drill rod through the rotating shaft, and the blade part is located on the same side of the rotating shaft axis; the blade is internally formed with a blade flow passage, one end of the blade flow passage penetrates the rotating shaft to communicate with the drill rod flow passage, the other end extends to the blade part and forms a flow passage opening communicating with the outside, and the flow passage opening is located on the side of the blade part away from the rotating shaft; the drill rod rotation drives the blade to move, and along the drill rod rotation direction, the rotating shaft faces the drill rod rotation direction as the blade leading edge, and the blade part serves as the blade trailing edge.

[0006] Further, a plurality of groups of blades are connected to the drill rod and are distributed at intervals along the axial direction, and the plurality of blades in each group are uniformly distributed at intervals along the circumferential direction of the drill rod.

[0007] Further, each group of blades of the drill rod is two, and the rotating shafts corresponding to the two blades are coaxially distributed and located on different sides of the drill rod axis.

[0008] Further, an end of the blade part away from the rotating shaft extends a curved part, and the curved part is raised relative to the main part of the blade part.

[0009] Further, the blade part is in the shape of a backward-swept wing, one end of the blade part is connected to the rotating shaft, the other end forms a smooth tip, and the side of the blade part close to the drill rod between the two ends is an output surface, and the flow passage openings are distributed on the output surface.

[0010] Further, a plurality of flow passage openings are provided and are distributed at intervals on the blade part and respectively communicate with the blade flow passage.

[0011] Further, a blade part is formed on the side of the rotating shaft away from the blade part, and the blade part is located on the blade leading edge.

[0012] Further, the blade rotates around the rotating shaft axis, and the front end of the drill rod is a tapered tip.

[0013] The second object of the present application is to provide a working method of a passive autorotation blade omnidirectional stirring drill bit, which utilizes the passive autorotation blade omnidirectional stirring drill bit provided in the first object, and comprises the following steps: The drill rod is connected to a rotation power source to enable the drill rod to rotate around its axis, and the drill rod flow passage is connected to an internal material supply source to input internal materials into the drill rod flow passage; When the drill rod is rotated downward, the blade is subjected to external material resistance, the blade leading edge formed by the rotating shaft faces the rotation direction, and the blade part is located above and behind the rotating shaft; when the drill rod is rotated upward, the blade leading edge formed by the rotating shaft faces the rotation direction, and the blade part is located below and behind the rotating shaft; When the drill rod adjusts the rotation direction, the blade part adjusts the position, so that the blade part is behind the rotation shaft as the blade trailing edge; The blade flow channel receives the internal material input in the drill rod flow channel and discharges to the rear of the blade part through the flow channel port; The blade disturbs and mixes the internal material and the external material.

[0014] Further, when the rotation direction of the drill rod and / or the rotation direction of the drill rod is adjusted, the rotation shaft of the blade leading edge is adjusted to the direction of the spiral rotation, so as to reduce the rotation resistance.

[0015] Compared with the prior art, the present application has the advantages and positive effects that: In view of the problem that the mixing uniformity cannot be guaranteed due to poor adaptability and easy blockage of the blade of the mixing drill bit, when the blade is moved by the rotation of the drill rod, the rotation shaft of the blade leading edge faces the rotation direction of the drill rod, and the blade trailing edge is the blade part. When the drill rod rotates forward or reversely, the force of the external material on the blade part can drive the blade to rotate around the rotation shaft. The flow channel port is located on the side of the blade part away from the rotation shaft, and the blade can adjust the position with the rotation of the drill rod and the self-rotation. During the forward rotation, reverse rotation, upward movement or downward movement of the drill rod, the self-rotation of the blade can adaptively change the position and orientation of the flow channel port. When the density of the external material is relatively large, no matter the rotation direction of the drill rod, the self-rotation of the blade can make the flow channel port avoid the direct pressure direction of the external material as much as possible, so that the internal material is discharged from the position with relatively small pressure, the extrusion pressure is reduced, the energy consumption is reduced, the blockage of the hole by the material is reduced, and the mixing uniformity of the material is guaranteed.

[0016] When the drill rod rotates forward, the external material impacts the blade part, so that the blade part rotates, the angle of the blade part is adjusted, the head-on collision with the external material is reduced, and the resistance is reduced. When the drill rod reversely rotates, the blade part also rotates due to the force of the external material, the orientation of the blade part is changed, the output position of the internal material is not directly opposite to the external material, so that the extrusion pressure of the internal material is reduced, and the risk of blockage is reduced.

[0017] The blade not only rotates with the drill rod, but also passively rotates, so that multi-directional mixing is realized. Under different movement states (forward rotation, reverse rotation, upward movement, and downward movement) of the drill rod, the combination of the self-rotation and the rotation of the blade part enables the blade part to mix the external material and the internal discharge material from multiple directions, breaks the limitation of single-direction mixing, improves the uniformity of the material mixing, and reduces the resistance and the energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the application. The use of these drawings in explaining the application is not intended as a limitation of the present application, and thus the present application should not be construed as limited to the embodiments set forth herein.

[0019] Figure 1 A schematic diagram of a passive autorotating blade omnidirectional mixing drill bit in accordance with one or more embodiments of the application.

[0020] Figure 2 A schematic diagram of a drill pipe rotating counterclockwise and spinning down in accordance with one or more embodiments of the application.

[0021] Figure 3 A schematic diagram of a drill pipe rotating counterclockwise and spinning up in accordance with one or more embodiments of the application.

[0022] Figure 4 A schematic diagram of a drill pipe rotating clockwise and spinning down in accordance with one or more embodiments of the application.

[0023] Figure 5 A schematic diagram of a drill pipe rotating counterclockwise and spinning up in accordance with one or more embodiments of the application.

[0024] Figure 6 A schematic diagram of a drill pipe in accordance with one or more embodiments of the application.

[0025] Figure 7 A schematic diagram of a blade internal structure in accordance with one or more embodiments of the application.

[0026] Figure 8 A schematic diagram of another blade internal structure in accordance with one or more embodiments of the application.

[0027] wherein 1 is a drill pipe; 2 is a blade; 3 is a drill pipe flow passage; 4 is a blade edge; 5 is a blade portion; 6 is a blade leading edge; 7 is a blade trailing edge; 8 is a flow passage opening; 9 is an output face; 101 is a rotating shaft; 102 is an axial blocking ring; 103 is a flow discharge opening; 104 is a rotating shaft flow passage; 105 is a bearing; 106 is a sealing ring; 201 is a blade flow passage; 202 is a blade flow passage branch; 203 is a near-center flow passage branch. DETAILED DESCRIPTION

[0028] Embodiment 1 In one exemplary embodiment of the application, as shown in FIG. 1, an omnidirectional mixing drill bit with passive autorotating blades is provided. Figures 1-8

[0029] ​In the prior art, when the density of the external material is large, the nearby material will generate pressure on the drill bit when the drill bit is used to supply and mix the material. When the drill bit rotates in a single direction, the output of the internal material at the tail end of the blade 2 can reduce the extrusion pressure; but when it rotates in the opposite direction, the output position of the internal material is towards the position of the external material, which increases the extrusion pressure and easily blocks the output hole of the blade 2. The existing scheme does not consider the resistance of the blade 2 during forward rotation, reverse rotation, upward and downward drilling processes, and can only mix well when rotating in one direction and feeding in one direction. It is difficult to meet the mixing requirements when reversing or lifting, and the resistance of the blade 2 is large, which consumes a lot of energy. The adaptability of the blade 2 is poor, the internal material output channel is easily blocked, and the uniformity of the mixture cannot be guaranteed.

[0030] Based on this, the embodiment provides an omnidirectional mixing drill bit with a passive self-rotating blade. The drill bit and the blade 2 are combined, the blade 2 is rotatably installed on the drill bit, and when the drill rod 1 rotates to drive the blade 2 to move, because the rotation axis 4 of the blade leading edge 6 faces the rotation direction of the drill rod 1, and the blade trailing edge 7 is the blade part 5, when the drill rod 1 rotates forward or reversely, in addition to following the drill rod 1 in revolution, the force of the external material acting on the blade part 5 will drive the blade 2 to rotate around the rotation axis 4, and the driving force of the self-rotation comes from the passive acceptance of the external material.

[0031] The blade 2 generates a self-rotation torque according to the received external material thrust, so that the rotation angle of the blade 2 relative to the axis of the drill rod 1 changes, and the change angle is related to the ratio of the rotation and feeding of the drill rod 1, the rotation axis 4 of the blade leading edge 6 is always towards the direction of spiral advancement, which promotes the balance of the soil pressure on both sides of the blade 2 and reduces the resistance of the spiral advancement.

[0032] As shown in Figures 1-5 , the inside of the drill rod 1 is hollow to form a drill rod flow channel 3 for conveying internal material. The blade 2 is composed of a connected rotation axis 4 and a blade part 5, the axis of the rotation axis 4 and the axis of the drill rod 1 are distributed at an angle, the angle between the axis of the rotation axis 4 and the axis of the drill rod 1 is in the range of 80°-100°, optionally, the axis of the rotation axis 4 can be perpendicular to the axis of the drill rod 1, or the axis of the rotation axis 4 can be close to the perpendicular state with the axis of the drill rod 1. It can be understood that the rotation axis 4 and the blade part 5 can be rotatably connected, and one end of the rotation axis 4 can be fixed to the drill rod 1, or the rotation axis 4 and the blade part 5 can be fixedly connected, so that the rotation axis 4 and the drill rod 1 are rotatably connected. In the embodiment, the rotation axis 4 and the blade part 5 are rotatably connected as an example.

[0033] As shown in Figure 6 , the axis of the rotation axis 4 is perpendicular to the drill rod 1 and rotatably connected to the drill rod 1, so that the blade 2 can rotate relative to the drill rod 1 around the rotation axis 4. The blade part 5 is located on the same side of the axis of the rotation axis 4, so that the blade 2 can receive forces in different directions when the drill rod 1 rotates.

[0034] The blade 2 is internally formed with a blade flow channel 201, one end of which communicates with the drill rod flow channel 3 through the rotating shaft 4, and the other end extends to the blade portion 5 and forms a flow channel opening 8 on the side of the blade portion 5 away from the rotating shaft 4, thereby ensuring that the internal material can be discharged from the side of the blade portion 5 away from the rotating shaft 4. As shown in Figure 7 , the rotating shaft 4 is internally formed with a rotating shaft flow channel 104, one end of which communicates with the drill rod flow channel 3, and the other end communicates with the blade flow channel 201 as a discharge opening 103. In order to facilitate the connection between the rotating shaft 4 and the blade 2, the blade 2 is provided with a mounting hole, one end of the rotating shaft 4 penetrates into the mounting hole, and the other end is connected to the drill rod 1. The rotating shaft 4 is internally formed with an axial stop ring 102, which cooperates with the annular groove in the mounting hole, thereby restricting the axial position of the rotating shaft 4 and the blade 2, and preventing the blade 2 from being separated from the rotating shaft 4.

[0035] In other alternative embodiments, the rotating shaft 4 is also internally formed with a rotating shaft flow channel 104, and the discharge openings 103 are distributed on the outer circumferential surface of the rotating shaft 101, as shown in Figure 8 , the discharge openings 103 are provided in multiple numbers and are distributed at intervals on the rotating shaft 101. The blade 2 is provided with a mounting hole, and the blade 2 is internally formed with a blade flow channel 201, which communicates with the mounting hole, so that the discharge openings 103 communicate with the blade flow channel 201. Since the discharge openings 103 are provided in multiple numbers, at least one discharge opening 103 can always communicate with the blade flow channel 201 during the rotation of the blade 2, thereby ensuring that the material in the drill rod 1 can enter the blade flow channel 201 through the rotating shaft flow channel 104 and the discharge openings 103.

[0036] As shown in Figure 8 , the blade portion 5 of the blade 2 is a hollow structure, which serves as a blade flow channel 202, and a plurality of flow channel openings 8 are formed in the trailing edge 7 of the blade portion 5 to output the material in the blade flow channel 202. Similarly, in Figure 8 , the rotating shaft 4 is internally formed with an axial stop ring 102, which cooperates with the annular groove in the mounting hole, thereby restricting the axial position of the rotating shaft 4 and the blade 2, and preventing the blade 2 from being separated from the rotating shaft 4.

[0037] As shown in Figure 7 and Figure 8 , in order to reduce the frictional resistance when the blade 2 and the rotating shaft 101 are matched, bearings 105 are installed at the matching position of the blade 2 and the rotating shaft 101. The inner ring of the bearing 105 is fitted to the drill rod and matched, and the outer ring is matched with the recess provided on the blade 2. As shown in Figure 7 , in order to form a good rotary seal at the matching position of the blade 2 and the rotating shaft 101, a sealing groove can also be formed in the corresponding mounting hole of the blade 2, and the sealing groove is matched with a sealing ring 106 to realize rotary sealing. The sealing ring 106 can be an O-ring, a rubber ring, etc.

[0038] In the direction of rotation of the drill pipe 1, the rotation shaft 4 faces the direction of rotation as the blade leading edge 6, and the blade 2 is the blade trailing edge 7, which clearly shows the force direction and positional relationship of the blade 2 in the rotation process of the drill pipe 1.

[0039] By reducing resistance and pressure through adaptive rotation, when the drill pipe 1 rotates and drives the blade 2 to move, the blade leading edge 6 (rotation shaft 4) faces the direction of rotation of the drill pipe 1, and the blade trailing edge 7 is the blade 5. When the drill pipe 1 rotates forward or reverses, the external material acting on the blade 5 will push the blade 2 to rotate around the rotation shaft 4. For example, when the drill pipe 1 rotates forward, the external material impacts the blade 5, causing the blade 2 to rotate, adjusting the angle of the blade 5, reducing the head-on collision with the external material, and reducing resistance; when the drill pipe 1 reverses, the blade 2 will also rotate due to the force of the external material, changing the direction of the blade 5, avoiding the output position of the internal material directly facing the external material, thereby reducing the extrusion pressure of the internal material and reducing the risk of blockage.

[0040] The output position and method of the internal material are also optimized. The flow channel opening 8 is located on the side of the blade 5 away from the rotation shaft 4, and the blade 2 can adjust its position with the rotation of the drill pipe 1 and its own rotation. During the rotation, reverse rotation, lifting or lowering of the drill pipe 1, the rotation of the blade 2 causes the position and orientation of the flow channel opening 8 to adaptively change. When the density of the external material is large, regardless of the direction of rotation of the drill pipe 1, the rotation of the blade 2 can make the flow channel opening 8 avoid the direct pressure direction of the external material as much as possible, allowing the internal material to be discharged from a position with relatively low pressure, reducing the extrusion pressure, and reducing the blockage of the hole by the material.

[0041] The blade 2 not only rotates with the drill pipe 1, but also passively rotates, achieving multi-directional stirring. In different motion states of the drill pipe 1 (forward rotation, reverse rotation, lifting, and lowering), the combination of rotation and rotation of the blade 2 allows the blade 5 to stir the external material and internal discharge material from multiple directions, breaking the limitations of single-direction stirring and improving the uniformity of material mixing. At the same time, the blade 2 adaptively adjusts the angle, reducing resistance and energy consumption, and improving the adaptability of the drill bit.

[0042] The passive rotation of the blade 2 can automatically adjust the angle according to the direction of motion of the drill pipe 1 and the force of the external material, reducing resistance with the external material, and reducing energy consumption of the entire stirring drill bit during operation. By adjusting the position of the flow channel opening 8 through the rotation of the blade 2, the internal material can avoid excessive pressure during output, reducing the risk of blockage and ensuring the smoothness of material supply and stirring. The multi-directional stirring method allows the internal material and external material to be more fully mixed, which can promote physical or chemical reactions between materials in multiple technical scenarios such as chemical synthesis and mineral processing, improving the uniformity of mixing and work efficiency. The structural design of the blade 2 allows it to adaptively work in different working conditions such as forward rotation, reverse rotation, lifting, and lowering of the drill pipe 1, meeting the needs of multi-directional stirring and having strong adaptability.

[0043] It should be noted that in this embodiment, blade 2 is passively rotating. Compared to actively driving blade 2, passive adjustment simplifies the structure, eliminates the need for additional drive components, and reduces costs and failure rates. Active driving requires a complex drive system including motors, gears, and transmission rods, while passive adjustment achieves blade 2's rotation through the rotation of drill rod 1 and the force of external material, eliminating the need for an independent drive device. In this embodiment, blade 2 is rotatably connected to drill rod 1 via shaft 4, utilizing the impact force of external material on blade 5 during drill rod 1 rotation to drive its rotation, resulting in a more compact structure. Passive adjustment eliminates complex transmission chains, relying solely on the rotation of shaft 4, leading to higher mechanical reliability and lower maintenance costs.

[0044] When the density of external materials changes or the direction of movement of drill rod 1 changes (such as forward rotation, reverse rotation, or upward movement), the active drive requires a preset program or manual adjustment of the rotation speed, while the passive adjustment blade 2 will automatically adjust the angle according to the real-time resistance. For example, when the density of external materials is high, the blade 2 is subjected to strong impact force and its rotation will be more violent, which optimizes the contact angle between the blade 5 and the material and reduces resistance. When rotating in the reverse direction, the rotation of blade 2 will change the direction of the flow channel 8 to avoid material blockage. The flow channel 8 is located on the side of blade 5 away from the rotating shaft 4, and the rotation can adjust the output position.

[0045] Actively driven blades 2 typically have a fixed rotation direction, making it difficult to maintain a stirring effect when reversing or moving up and down. Passively adjustable blades 2 can automatically switch their rotation direction according to the movement direction of the drill rod 1, achieving omnidirectional stirring. For example, when the drill rod 1 is lifted, the rotation of blades 2 can keep the blades 5 shearing the material, while active drives require additional control logic to change the rotation direction, resulting in poor adaptability.

[0046] Active drive requires continuous electrical or mechanical energy to rotate blade 2, while passively adjusted blade 2's rotation is powered by the gyratory energy of drill rod 1 and the interaction force of materials, requiring no additional energy consumption. When drill rod 1 rotates, blade 2 passively rotates due to material resistance, converting some resistance energy into stirring kinetic energy, reducing the system's total energy consumption. Active drive is prone to "idling" or overload during sudden changes in resistance, wasting energy; in this embodiment, passively adjusted blade 2 automatically adjusts its speed according to resistance, rotating slower as resistance increases, avoiding ineffective energy loss. When material blocks flow channel 8, blade 2's rotation slows due to increased resistance, while simultaneously changing the blade angle 5 to aid in unblocking, whereas active drive may cause motor overheating due to continuous rotation.

[0047] The flow channel opening 8 of the actively driven blade 2 is in a fixed position, and when it rotates in the opposite direction, it is easily blocked by high-density materials. The passively adjusted blade 2 changes the orientation of the flow channel opening 8 by rotating, so that the material output direction avoids the high-pressure area. When the drill rod 1 reverses, the rotation of the blade 2 will cause the flow channel opening 8 to turn to the side, reducing the frontal compression of materials and reducing the probability of blockage.

[0048] like Figures 2-5As shown, multiple sets of blades 2 are spaced apart along the axial direction on the drill pipe 1. Each set contains multiple blades 2 and is evenly distributed along the circumferential direction. In this embodiment, each set has two blades 2, coaxially distributed on opposite sides of the drill pipe 1 axis. If the drill pipe 1 has 3 sets of blades 2 arranged axially, with 2 blades 2 in each set, then one blade 2 is arranged every 180° in the circumferential direction, forming a centrally symmetrical structure.

[0049] Multiple sets of blades 2 cover different depths along the axial direction, and the circumferentially distributed blades 2 simultaneously perform multi-directional shearing and mixing of materials, avoiding localized mixing blind spots. For example, in civil construction, the mixing of deep soil and cement can be achieved through axially distributed multiple sets of blades 2 to achieve uniform mixing at all depths. The circumferentially symmetrically distributed blades 2 (such as two sets of blades 2 distributed on opposite sides) can counteract the eccentric force when the drill rod 1 rotates, reducing the vibration of the drill rod 1 and improving stability. For example, the radial forces generated by the two sets of blades 2 during rotation are balanced, preventing the drill rod 1 from deviating due to excessive resistance on one side.

[0050] The end of the blade 5 furthest from the axis of rotation 4 extends into a curved section. This curved section is raised relative to the main body of the blade 5, forming a "spoon-shaped" or "arc-shaped" structure. During rotation, the curved section guides material towards the center of the blade 5, while simultaneously reducing material impact resistance through its guiding effect. For example, in chemical synthesis, the curved section can "catch" viscous materials and throw them towards the flow channel 8, promoting mixing between internal and external materials.

[0051] Furthermore, the curved surface allows the blade 5 to be in a near-horizontal but not horizontal state when the drill rod 1 rotates, making it easier to receive external material forces and adjust its posture in a timely manner.

[0052] The blade 5 is a swept-back airfoil. One end of the blade 5 is connected to the rotating shaft 4, and the other end forms a smooth tip. The side of the blade 5 closest to the drill pipe 1 between the two ends forms the output surface 9, and the flow channels 8 are distributed on the output surface 9. The swept-back airfoil design reduces drag during high-speed rotation (similar to the drag reduction principle of an aircraft wing), while the smooth tip reduces the risk of material jamming. The swept-back airfoil design allows the blade 2 to generate a rotational torque based on the received soil thrust when rotating clockwise upwards, clockwise downwards, counterclockwise upwards, and counterclockwise downwards, causing the angle of rotation of the blade 2 relative to the brick to change. like Figure 7 As shown, a blade flow channel 201 is formed within the blade portion 5, and multiple spaced flow channel openings 8 are provided on the output surface 9 of the blade portion 5. To establish communication between the blade flow channel 201 and the flow channel openings 8, blade flow channel branches 202 are also configured within the blade portion 5. Each flow channel opening 8 is connected to the blade flow channel 201 through a blade flow channel branch 202. The multiple flow channel openings 8 disperse the material output pressure, preventing blockage of a single flow channel opening 8; at the same time, multiple discharge points allow for more uniform contact between the internal material and the external material. For example, in pharmaceutical granulation, the binder is uniformly sprayed onto the pharmaceutical powder through the multiple flow channel openings 8, forming particles with more uniform particle size.

[0053] It should be noted that, as shown in Figure 7 The blade 2 is provided with a plurality of blade flow passage branches 202, which form an obtuse angle with the axis of the rotating shaft 101, so that the material output through the flow passage opening 8 can expand and throw out in a larger range; due to the centrifugal effect, the material output through the flow passage opening 8 has a tendency to throw out in a direction away from the axis of the drill rod 1; in order to provide sufficient material for mixing near the drill rod 1, in this embodiment, the blade 2 is also provided with a near-center flow passage branch 203, the axis of which forms an acute angle with the axis of the rotating shaft 101, so that the material passing through the near-center flow passage branch 203 can be output near the drill rod 1, thereby facilitating the mixing of the material near the drill rod 1.

[0054] The rotating shaft 4 forms a blade part away from the blade part 5, which is located at the leading edge 6 of the blade and faces the rotation direction of the drill rod 1. The blade part can cut into the material before the blade part 5, break large particles, and reduce the stirring resistance of the blade part 5. For example, when processing construction waste, the blade part first splits the concrete block, and the subsequent blade part 5 performs fine stirring to improve efficiency.

[0055] The front end of the drill rod 1 is a tapered tip, which reduces the resistance of entering the soil or the material, and simultaneously guides the material to gather in the area of the blade 2. The tapered tip guides the material flow to the blade 2, and the blade 2 realizes multidirectional stirring through passive rotation. For example, in environmental treatment, after the tapered tip of the drill rod 1 is inserted into the sludge layer, the blade 2 rotates to mix the sludge and the solidifying agent from multiple directions, thereby improving the solidification effect.

[0056] When a plurality of groups of blades 2 are distributed along the axial direction, the passive rotation direction of each group of blades 2 can be automatically adjusted with the movement of the drill rod 1. When the drill rod 1 is drilling, the bottom blades 2 rotate faster due to the resistance of the material, and when the drill rod 1 is lifted, the top blades 2 rotate faster, thereby realizing adaptive stirring at full depth.

[0057] The swept-wing-shaped blade part 5 and the curved surface part are designed by referring to the drag reduction principle of fluid mechanics, and simultaneously realize mechanical adaptation through passive rotation, so that the blade 2 can automatically adjust the angle under different material resistance, and both efficiency and energy consumption are considered. For example, in food processing, when the viscosity of the dough changes, the blade 2 will automatically adjust the stirring intensity according to the resistance, thereby avoiding motor overload. The axial multiple groups of blades 2 and the circumferential distribution form a “three-dimensional stirring network”, which cooperates with the multi-point discharge of the flow passage opening 8 to realize three-dimensional mixing of the material in the radial, axial, and circumferential directions. In a chemical synthesis reactor, this structure can replace the traditional multi-shaft stirrer, and realize full-space mixing through a single drill rod 1, thereby reducing equipment cost.

[0058] For the problem of uneven mixing caused by one-way stirring, in this embodiment, all-directional stirring is realized by combining multiple sets of ring-shaped blades 2 with passive autorotation, covering all angles; For the problem of high-viscosity material blocking the flow channel port 8, in this embodiment, multiple flow channel ports 8 are configured to disperse the discharge in combination with the curved part guide, reducing the risk of blockage; For the problem of severe blade 2 wear when stirring hard materials, in this embodiment, the blade part 4 is configured to pre-crush in combination with the rear-swept wing shape to reduce drag and reduce direct impact on the blade 2.

[0059] For the problem of poor stability of the drill rod 1 during deep hole stirring, in this embodiment, the ring-shaped symmetric blade 2 is configured to balance the resistance in combination with the tapered tip drill rod 1, improving the stability of deep hole operation.

[0060] Embodiment 2 In another typical embodiment of the present application, as shown in Figures 1-8 A working method of a passive autorotation blade all-directional stirring drill bit is given, which utilizes the passive autorotation blade all-directional stirring drill bit in embodiment 1.

[0061] A working method of a passive autorotation blade all-directional stirring drill bit, comprising: The drill rod 1 is connected to a rotary power source, so that the drill rod 1 can rotate around its axis, and the drill rod flow channel 3 is connected to an internal material supply source to input internal material into the drill rod flow channel 3; When the drill rod 1 is rotated downward, the blade 2 is subjected to external material resistance, so that the blade leading edge 6 formed by the rotating shaft 4 is directed toward the rotation direction, and the blade part 5 is located above and behind the rotating shaft 4; when the drill rod 1 is rotated upward, the blade leading edge 6 formed by the rotating shaft 4 is directed toward the rotation direction, and the blade part 5 is located below and behind the rotating shaft 4; When the drill rod 1 adjusts the rotation direction, the blade part 5 adjusts the position accordingly, so that the blade part 5 serves as the blade trailing edge 7 behind the rotating shaft 4; The blade flow channel 201 receives the internal material input into the drill rod flow channel 3 and discharges it to the rear of the blade part 5 through the flow channel port 8; The blade 2 disturbs and mixes the internal material and the external material.

[0062] When the drill rod 1 adjusts the rotation direction or the rotation direction of the drill rod 1, the rotating shaft 4 of the blade leading edge 6 is adjusted to the direction of the spiral rotation, reducing the rotation resistance.

[0063] The drill rod 1 is connected to a rotary power source (such as a motor) to realize rotation around the shaft, and at the same time the drill rod flow channel 3 is connected to an internal material supply source (such as a pump or a hopper) to form a composite function of rotary stirring combined with material conveying. For example, in civil construction, the drill rod 1 is rotated to cut into the soft soil foundation, and at the same time the cement slurry is conveyed through the flow channel to realize simultaneous drilling and grouting.

[0064] The power source and the material supply source are kept in synchronization through mechanical linkage or program setting, ensuring that the internal material is continuously output when the drill rod 1 rotates. When the rotation speed of the drill rod 1 increases, the amount of material supply is automatically increased to avoid idling or blockage of the flow channel port 8.

[0065] The internal material is discharged through the drill rod flow channel 3, the shaft flow channel 104, the blade flow channel 201, and the flow channel port 8, which is located on the side of the blade 5 away from the shaft 4, i.e., the trailing edge 7 of the blade. When the drill rod 1 rotates, the blade 5 adjusts its position passively to make the flow channel port 8 always in the area with the most intense material disturbance.

[0066] When the drill rod 1 rotates downward (drilling down), the external material resistance pushes the blade 2, causing the shaft 4 (blade leading edge 6) to rotate toward the downward direction, and the blade 5 is located above and behind the shaft 4. At this time, the blade 5 is in an upwardly inclined state with the material contact angle, lifting the lower material upward and mixing with the discharged internal material.

[0067] When the drill rod 1 rotates upward (pulling up), the leading edge of the shaft 4 faces the upward rotation direction, and the blade 5 is located below and behind the shaft 4, in a "sweeping down" state, dragging the upper material downward and mixing with the internal material.

[0068] When the drill rod 1 switches between forward and reverse rotation, the blade 2 quickly adjusts the position of the blade 5 through passive rotation, always keeping the blade 5 as the trailing edge behind the shaft 4. When rotating forward, the blade 5 deflects to the right, and when rotating in reverse, it immediately deflects to the left, ensuring that the flow channel port 8 always discharges material behind the blade 5, avoiding a sudden increase in material output pressure due to a change in rotation direction.

[0069] When adjusting the direction of the drill rod 1 (such as helical drilling or pulling up), the shaft 4 of the blade leading edge 6 automatically faces the direction of rotation, forming a "point guidance" effect. When the drill rod 1 drills downward in a helical trajectory, the leading edge of the shaft 4 first cuts into the material, and the blade 5 follows to continue stirring, converting the "straight face pressing resistance" of the traditional blade 2 into "inclined face cutting resistance", which can be reduced by more than 30%.

[0070] The rotation of the drill rod 1 drives the blade 2 to revolve, and the blade 2 passively rotates to realize rotation, forming a compound motion of revolution combined with rotation, so that the blade 5 draws a helical trajectory in space and performs three-dimensional disturbance of the material in the radial, axial, and circumferential directions. For example, in food processing, this motion can shear and knead multiple components such as flour, water, and yeast from different directions to form a uniform dough.

[0071] The existing stirring method needs to adjust the rotating speed or angle of the blade 2 through a sensor and a controller (such as the actively driven blade 2), and in the embodiment, the blade 2 is passively rotated by relying on the rotation direction of the drill rod 1 and the material resistance, without the need of electronic control. In the civil construction without power supply in the field, the method can automatically adapt to different soil layer resistances through mechanical structure, and reduces the dependence of equipment. The traditional method can only effectively stir in the single direction rotation or single direction feeding, and the method can realize the mixing in the whole working condition of drilling, lifting, forward rotation and reverse rotation by automatically adjusting the posture of the blade 2 along the rotation direction.

[0072] The embodiment is suitable for the construction of the cement-soil mixing pile in soft soil foundation. In the drilling stage, the drill rod 1 is rotated downward, the blade leading edge 6 is directed to the drilling direction, the soil body is lifted upward at the back of the blade 5, the cement slurry is discharged from the flow channel opening 8, is stirred by the blade 5 and is mixed with the soil body, and the preliminary cement-soil is formed. In the design depth stirring stage, the drill rod 1 is positively and reversely rotated at the design depth, the blade 2 is passively rotated to adjust the posture, the cement-soil is stirred from multiple directions, and the uniformity is ensured. In the lifting stage, the drill rod 1 is rotated upward, the blade leading edge 6 is directed upward, the upper soil body is dragged downward at the back of the blade 5, is secondarily mixed with the continuously discharged cement slurry, and the backflow of the cement slurry in the lifting is avoided. In the pile forming stage, the helical stirring track formed by the revolution and rotation of the blade 2 in the whole process improves the density of the cement-soil, and the pile forming strength is improved than that of the traditional method.

[0073] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A passive, auto-rotating blade, omnidirectional, agitator drill bit, characterized by, The application relates to a drill rod and a blade. The drill rod is internally hollow to form a drill rod flow channel. The blade comprises a rotating shaft and a blade part, the rotating shaft is arranged at an angle to the drill rod axis, the blade part is connected to the drill rod through the rotating shaft, and the blade part is located on the same side of the rotating shaft axis. The drill rod rotation drives the blade to move, and the rotating shaft faces the drill rod rotation direction as the blade leading edge, and the blade part is the blade trailing edge.

2. The passive, spinner blade, omnidirectional, mixing bit of claim 1 wherein, The drill rod is connected with multiple groups of blades which are distributed along the axial direction.

3. The passive, spinner blade, omnidirectional drag bit of claim 2 wherein, Each group of blades comprises two blades, and the corresponding rotating shafts of the two blades are coaxially arranged on the opposite sides of the drill rod axis.

4. The passive spinner, omnidirectional, drag bit of claim 1 wherein, The blade part extends a curved part from the end far away from the rotating shaft.

5. The passive spinner, omnidirectional, drag bit of claim 1 wherein, The blade part is a backward-swept wing, one end of the blade part is connected to the rotating shaft, the other end forms a smooth tip, the side of the blade part close to the drill rod between the two ends is an output surface, and the flow channel ports are arranged on the output surface.

6. The passive, spinner blade, omnidirectional drag bit of claim 5 wherein, The flow channel ports are arranged on the output surface.

7. The passive spinner, omnidirectional, drag bit of claim 1 wherein, The rotating shaft forms a blade part far away from the blade part, and the blade part is located on the blade leading edge.

8. The passive spinner, omnidirectional, drag bit of claim 1 wherein, The blade rotates around the rotating shaft axis, and the front end of the drill rod is a tapered tip.

9. A method of operating a passive, self-rotating blade, omnidirectional, agitator drill bit using the passive, self-rotating blade, omnidirectional, agitator drill bit of any one of claims 1-8, wherein, The drill rod is connected to a rotary power source to enable the drill rod to rotate around the axis, and the drill rod flow channel is connected to an internal material supply source to input internal materials into the drill rod flow channel. When the drill rod rotates downward, the blade is subjected to external material resistance, the blade leading edge formed by the rotating shaft faces the rotating direction, and the blade part is located above the rotating shaft; when the drill rod rotates upward, the blade leading edge formed by the rotating shaft faces the rotating direction, and the blade part is located below the rotating shaft. When the drill rod adjusts the rotating direction, the blade part adjusts the position to be located behind the rotating shaft as the blade trailing edge. The blade flow channel receives the internal materials input into the drill rod flow channel and discharges the internal materials to the rear of the blade part through the flow channel ports. The blade disturbs and mixes the internal materials and the external materials. When the drill rod adjusts the rotating direction and / or the rotating direction of the drill rod, the rotating shaft of the blade leading edge is adjusted to face the direction of the spiral rotation, and the rotating resistance is reduced.

10. The method of operation of a passive, spinner- blade, omnidirectional, mixing bit according to claim 9, wherein, ​

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