A sealing place slagging structure of a mining three cone bit

Abstract

The utility model relates to the field of mining cone bit, especially to a mine three cone bit sealing place deslagging structure, the mine three cone bit sealing place deslagging structure includes: drill rod, drill bit body, cone, sealing ring and deslagging component, the inside of drill rod is provided with the inner hole for the compressed air flow, the bottom of drill rod is installed with drill bit body, the inside of drill bit body is installed with the equal interval toothed yoke, the inner side wall of toothed yoke all is installed with cone, the junction of cone and toothed yoke all is installed with sealing ring, the mine three cone bit sealing place deslagging structure provided by the utility model passes through the annular physical barrier of fender ring, first intercepts the large particle size rock debris, avoids its direct contact sealing ring, simultaneously, the wear -resisting brush of spiral brush can continue to clean the small rock debris remaining in the gap, combines the centrifugal flow guide effect of arc guide groove, reduces the rock debris accumulation between toothed yoke and cone gap, to greatly reduce the risk of sealing failure.

Description

Technical Field

[0001] This utility model relates to the field of mining roller cone drill bits, and in particular to a slag discharge structure for the sealing part of a mining tri-cone drill bit. Background Technology

[0002] Mining roller cone drill bits are key tools for stripping and ore extraction in various open-pit mines. Different specifications and models of roller cone drill bits can drill holes of various diameters in different rock strata for loading explosives and blasting. Mining roller cone drill bits generally drill blasting holes vertically downwards. During drilling, the pressurization and rotation mechanism provides sufficient axial pressure and rotational torque to the roller cone drill bit through the drill rod. The roller cone continuously squeezes, cuts, impacts and breaks the rock as it rolls at the bottom of the hole. At the same time, compressed air with a certain pressure and flow rate is ejected from the drill bit nozzle through the inner cavity of the drill rod, continuously blowing rock cuttings from the bottom of the hole along the annular space of the drill rod and the hole wall to the outside of the hole. However, the working environment of mine drilling is harsh and the drilling conditions are complex. Rock cuttings may enter the sealing ring through the gap between the roller cone and the die and accumulate around the sealing ring. These accumulated rock cuttings will accelerate the wear and corrosion of the sealing ring, which will directly affect the service life of the drill bit. Existing tricone drill bits either do not have a cuttings discharge groove designed, or the cuttings discharge groove is not smooth. This will not only prolong the wear time between the rock cuttings and the tricone drill, but also make the rock cuttings smaller and smaller, which will make it easier to damage the sealing system of the tricone drill, allowing rock cuttings to enter the bearing and affect the working efficiency of the bearing.

[0003] Therefore, it is necessary to provide a new slag discharge structure for the sealing part of a mining tricone drill bit to solve the above-mentioned technical problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a slag discharge structure for the sealing part of a mining tricone drill bit.

[0005] The slag removal structure of the sealing part of the mining three-cone drill bit provided by this utility model includes: a drill rod, a drill bit body, roller cones, a sealing ring, and a slag removal assembly. The drill rod has an inner hole for compressed air flow. The drill bit body is installed at the bottom end of the drill rod. The drill bit body has roller cones installed at equal intervals inside. The inner sidewalls of the roller cones are all equipped with roller cones. The connection between the roller cones and the roller cones is equipped with a sealing ring. The slag removal assembly is installed between the roller cones and the roller cones. The slag removal assembly is used to remove rock cuttings around the sealing ring.

[0006] Preferably, the slag removal assembly includes: a spiral brush, an arc-shaped guide groove, and a retaining ring. The end face of the roller is provided with an arc-shaped guide groove at equal intervals around its circumference. A retaining ring is fixedly connected to the middle of the end face of the roller. The other end of the retaining ring is embedded in the interior of the roller. A spiral brush is fixedly connected to the inner wall of the roller. The outer wall of the spiral brush is provided with wear-resistant bristles.

[0007] Preferably, the drill bit body has injection holes equidistantly spaced inside, and one end of each injection hole is connected to the inner hole inside the drill rod.

[0008] Preferably, the drill bit body has a flow divider hole inside, one end of which is connected to the inner hole. The drill bit itself has a branch hole inside, one end of which is connected to the other end of the flow divider hole. The other end of the branch hole is connected to the inner area of ​​the retaining ring and is positioned above the sealing ring.

[0009] Preferably, the inner diameter of the branch hole is smaller than the inner diameter of the diversion hole.

[0010] Preferably, the retaining ring has chip removal holes equidistantly spaced inside.

[0011] Compared with related technologies, the slag discharge structure at the sealing point of the mining tricone drill bit provided by this utility model has the following beneficial effects: The ring-shaped physical barrier of the retaining ring first intercepts larger rock fragments, preventing them from directly contacting the sealing ring; at the same time, the wear-resistant bristles of the spiral brush continuously clean the fine rock fragments remaining in the gap, and combined with the centrifugal guiding effect of the arc-shaped guide groove, it reduces the accumulation of rock fragments between the tooth and the tooth wheel, thereby greatly reducing the risk of seal failure. The cuttings path is blocked by two levels of protection: on the one hand, the embedded fit between the retaining ring and the tooth reduces the gap and reduces the entry channel of cuttings; on the other hand, the high-pressure and high-speed airflow ejected from the branch hole will completely remove the micron-sized cuttings remaining inside the retaining ring, preventing them from intruding through the bearing gap; effectively preventing cuttings from accumulating around the sealing ring, protecting the sealing ring from wear and corrosion, and extending the service life of the drill bit. The efficient slag removal design effectively prevents rock cuttings from entering the bearing, reducing wear and jamming caused by rock cuttings intrusion, ensuring normal bearing operation, improving the overall working efficiency of the drill bit, reducing the frequency of downtime maintenance due to bearing failure, and improving the efficiency of mining operations. Attached Figure Description

[0012] Figure 1 A schematic diagram of the slag discharge structure at the sealing point of the mining tricone drill bit provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the drill bit body. Figure 3 for Figure 2 The diagram shows the structure at point A. Figure 4 for Figure 2 A schematic diagram of a partial cross-section of the drill bit body; Figure 5 for Figure 4 The diagram shows the structure of a toothed wheel.

[0013] The following are the labels in the diagram: 1. Drill rod; 2. Inner hole; 3. Drill bit body; 4. Tooth shank; 5. Tooth cone; 6. Sealing ring; 7. Spiral brush; 8. Arc-shaped guide groove; 9. Retaining ring; 10. Injection hole; 11. Diverter hole; 12. Support hole; 13. Chip removal hole. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0015] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0016] Please see Figures 1 to 5 A slag removal structure for a mining tricone drill bit seal is disclosed. The structure includes: a drill rod 1, a drill bit body 3, roller cones 5, a sealing ring 6, and a slag removal assembly. The drill rod 1 has an internal bore 2 for compressed air flow. The drill bit body 3 is mounted at the bottom end of the drill rod 1. Roller cones 4 are equidistantly mounted inside the drill bit body 3. Roller cones 5 are mounted on the inner sidewalls of the roller cones 4. Sealing rings 6 are installed at the connections between the roller cones 5 and the roller cones 4. A slag removal assembly is installed between the roller cones 5 and the roller cones 4. The slag removal assembly is used to remove rock cuttings around the sealing ring 6. The slag removal assembly includes: a spiral brush 7, an arc-shaped guide groove 8, and a retaining ring 9. The end face of the roller cone 5 has an arc-shaped guide groove 8 equidistantly spaced around its circumference. A retaining ring 9 is fixedly connected in the middle, and the other end of the retaining ring 9 is embedded in the interior of the toothed plate 4. A spiral brush 7 is fixedly connected to the inner side wall of the toothed plate 4. The outer wall of the spiral brush 7 is provided with wear-resistant bristles. The interior of the drill bit body 3 is provided with jet holes 10 at equal intervals, and one end of each jet hole 10 is connected to the inner hole 2 inside the drill rod 1. The interior of the drill bit body 3 is provided with a diversion hole 11, one end of which is connected to the inner hole 2. The interior of each toothed plate 4 is provided with a branch hole 12, one end of which is connected to the other end of the diversion hole 11. The other end of the branch hole 12 is connected to the interior area of ​​the retaining ring 9 and is positioned above the sealing ring 6. The inner diameter of the branch hole 12 is smaller than the inner diameter of the diversion hole 11. The interior of the retaining ring 9 is provided with chip discharge holes at equal intervals.

[0017] It should be noted that the arc-shaped guide grooves 8 equidistantly opened around the end face of the roller cone 5 will rotate synchronously with the rotation of the roller cone 5. On the one hand, the groove structure of the arc-shaped guide groove 8 can collect the rock chips swept down by the spiral brush 7, preventing the rock chips from scattering randomly on the end face of the roller cone 5 and re-entering the gap. On the other hand, the arc design of the arc-shaped guide groove 8 is adapted to the rotation direction of the roller cone 5. During the rotation, a certain centrifugal force will be generated, which will guide the rock chips collected in the groove to the outer edge of the roller cone 5, so that the rock chips are away from the central area where the sealing ring 6 is located, and finally carried out of the borehole by the airflow ejected from the jet hole 10.

[0018] The working principle of the slag discharge structure at the sealing point of the mining tricone drill bit provided by this utility model is as follows: Before the drill bit body 3 starts working, the external air supply system injects compressed air with a certain pressure, flow rate and velocity into the drill pipe 1. The pre-set inner hole 2 inside the drill pipe 1 serves as the main delivery channel for compressed air, which divides the airflow into two main directions: most of the compressed air is delivered directly downwards along the inner hole 2 and finally enters the jet holes 10 that are equidistantly opened inside the drill bit body 3. Since the inlet end of the jet hole 10 is completely connected to the inner hole 2, the airflow maintains a stable pressure in the jet hole 10 and finally sprays at high speed from the outlet end of the jet hole 10 to the bottom of the borehole. The core function of this airflow is to actively blow away the large amount of rock cuttings generated after the roller cone 5 breaks the rock, push the rock cuttings accumulated at the bottom of the hole upwards along the annular space between the drill pipe 1 and the hole wall, and finally discharge the rock cuttings outside the borehole, avoiding a large amount of rock cuttings accumulating at the bottom of the hole. This increases the risk of entering the sealed area; a small portion of compressed air enters the secondary delivery channel through the diversion hole 11 opened inside the drill bit body 3; one end of the diversion hole 11 is connected to the inner hole 2, and the other end is connected to the pre-set branch hole 12 inside the tooth 4, forming a continuous airflow path of inner hole 2-diversion hole 11-branch hole 12; since the inner diameter of the branch hole 12 is smaller than the inner diameter of the diversion hole 11, according to the principle of fluid mechanics, the compressed air will significantly increase its airflow velocity as it enters the branch hole 12 from the diversion hole 11 due to the reduced flow cross-sectional area, forming a high-pressure, high-speed airflow; this airflow is finally precisely delivered to the internal area enclosed by the retaining ring 9 and the tooth 4 through the outlet end of the branch hole 12, and the outlet position is exactly above the sealing ring 6, providing high-pressure power for the subsequent removal of rock cuttings in the sealed area; During the process of the drill bit body 3 driving the roller cone 5 to rotate at high speed to break rocks, the retaining ring 9, spiral brush 7 and arc-shaped guide groove 8 in the cuttings removal assembly cooperate with each other to actively prevent rock cuttings from approaching the sealing ring 6. The retaining ring 9 is fixedly connected to the middle of the end face of the roller cone 5, and the other end of the retaining ring 9 is embedded in the interior of the tooth plate 4. This structure makes the retaining ring 9 form a ring-shaped physical barrier at the gap between the roller cone 5 and the tooth plate 4. When external rock cuttings move towards the sealing ring 6 with the dust airflow generated by the drilling operation, the retaining ring 9 will first intercept the larger rock cuttings and prevent them from directly entering the core sealing area where the sealing ring 6 is located. At the same time, the embedded cooperation structure of the retaining ring 9 and the tooth plate 4 can also reduce the gap width between the roller cone 5 and the tooth plate 4, reduce the channel size for rock cuttings to enter, and reduce the probability of rock cuttings intrusion in space. A spiral brush 7 is fixedly connected to the inner wall of the toothed palm 4. Its outer wall is provided with wear-resistant bristles, and the bristles are in close contact with the end face of the toothed wheel 5. When the toothed wheel 5 rotates around the toothed palm 4 at high speed, there will be relative movement between the end face of the toothed wheel 5 and the bristles of the spiral brush 7. The wear-resistant bristles of the spiral brush 7 will continuously clean the end face of the toothed wheel 5 and the gap between the toothed wheel 5 and the toothed palm 4 like a brush. Under the guidance of the spiral structure, the rock chips are pushed away from the sealing ring 6 to prevent the rock chips from accumulating in the gap. The arc-shaped guide grooves 8, which are equidistantly spaced around the end face of the roller cone 5, rotate synchronously with the rotation of the roller cone 5. On the one hand, the groove structure of the arc-shaped guide grooves 8 can collect the rock chips swept down by the spiral brush 7, preventing the rock chips from scattering randomly on the end face of the roller cone 5 and re-entering the gap. On the other hand, the arc design of the arc-shaped guide grooves 8 is adapted to the rotation direction of the roller cone 5. During the rotation, a certain centrifugal force is generated, which guides the rock chips collected in the grooves to the outer edge of the roller cone 5, so that the rock chips are away from the central area where the sealing ring 6 is located, and are finally carried out of the borehole by the airflow ejected from the jet hole 10. After mechanical interception and cleaning, if a small amount of fine rock debris still enters the internal area of ​​the retaining ring 9, the second high-pressure, high-speed airflow will achieve the final removal of the rock debris at this stage: the high-pressure, high-speed airflow ejected from the branch hole 12 will directly impact the fine rock debris accumulated in the internal area of ​​the retaining ring 9; the impact force of the airflow will overcome the friction between the rock debris and the end face of the roller cone 5 and the inner wall of the retaining ring 9, peeling the rock debris from the contact surface and suspending it, preventing the rock debris from accumulating above the sealing ring 6 due to gravity; the retaining ring 9 has chip discharge holes 13 equidistantly opened inside. When the suspended rock debris moves towards the inner wall of the retaining ring 9 under the push of the high-pressure airflow, it will enter the arc-shaped guide groove 8 through the chip discharge holes 13; subsequently, under the rotational guiding effect of the arc-shaped guide groove 8 and the synergistic effect of the first main slag discharge airflow, the rock debris will be smoothly transported to the outside of the roller cone 5, and finally discharged outside the borehole along with the main rock debris at the bottom of the hole.

[0019] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A slag discharge structure for the sealing part of a mining tri-cone drill bit, characterized in that, include: The drill rod (1) has an inner hole (2) for compressed air flow. The drill bit body (3) is installed at the bottom end of the drill rod (1), and toothed plates (4) are installed at equal intervals inside the drill bit body (3). The inner walls of the toothed wheel (5) and the toothed palm (4) are both equipped with toothed wheels (5); A sealing ring (6) is installed at the connection between the toothed wheel (5) and the toothed palm (4); The slag removal assembly is installed between the roller (5) and the toothed palm (4). The slag removal assembly is used to remove rock debris around the sealing ring (6). The slag removal assembly includes: a spiral brush (7), an arc-shaped guide groove (8) and a retaining ring (9). The end face of the roller (5) is provided with an arc-shaped guide groove (8) at equal intervals around the circumference. The middle of the end face of the roller (5) is fixedly connected to the retaining ring (9). The other end of the retaining ring (9) is embedded in the interior of the toothed palm (4). The inner side wall of the toothed palm (4) is fixedly connected to the spiral brush (7). The outer wall of the spiral brush (7) is provided with wear-resistant bristles. The drill bit body (3) has a diversion hole (11) inside. One end of the diversion hole (11) is connected to the inner hole (2). The toothed edge (4) has a branch hole (12) inside. One end of the branch hole (12) is connected to the other end of the diversion hole (11). The other end of the branch hole (12) is connected to the inner area of ​​the retaining ring (9) and is placed above the sealing ring (6).

2. The slag discharge structure at the sealing point of the mining tri-cone drill bit according to claim 1, characterized in that, The drill bit body (3) has injection holes (10) equidistantly arranged inside, and one end of each injection hole (10) is connected to the inner hole (2) inside the drill rod (1).

3. The slag discharge structure at the sealing point of the mining tri-cone drill bit according to claim 1, characterized in that, The inner diameter of the branch hole (12) is smaller than the inner diameter of the diversion hole (11).

4. The slag discharge structure at the sealing point of the mining tri-cone drill bit according to claim 1, characterized in that, The retaining ring (9) has chip removal holes (13) spaced out at equal intervals inside.

Images