A trolley drill bit structure

Abstract

The present invention relates to a structure of a trolley drill bit, which includes a drill body and a wing body. Liquid discharge holes communicating with the installation holes are formed on the drill body between the top teeth, and slag discharge grooves are formed on the drill body between the top teeth. The slag discharge grooves extend along the radial direction of the drill body. One end of the liquid discharge hole far from the installation hole is located in the slag discharge groove. Main slag discharge grooves are circumferentially spaced on the wing body and extend along the circumferential direction of the drill body. One end of the main slag discharge groove is communicated with the slag discharge groove; auxiliary slag discharge grooves are formed on the wing body between the side teeth, and the auxiliary slag discharge grooves are arranged in parallel with the main slag discharge grooves; a drainage groove with one end communicated with the slag discharge groove is formed on the drill body, and the drainage groove extends towards the auxiliary slag discharge groove. The present invention has the effect that the central groove, the slag discharge groove and the drainage groove on the drill body further improve the discharge efficiency of rock powder during rotation, thereby improving the operation efficiency of rock drilling.

Description

Technical Field

[0001] The present invention relates to the technical field of rock drilling equipment, and in particular to a trolley drill bit structure. Background Art

[0002] Rock drilling is the process of drilling blastholes in rock (or ore). Rock drilling technology is widely used in mines, tunnels and other engineering projects.

[0003] Existing Chinese patent number CN205577851U discloses a rock drill bit, including a drill body, wherein the drill body is provided with an inner hole opening downward, the drill body is distributed in a wing-shaped manner, the wings and the end face of the drill body head are both embedded with main column teeth, and the drill body is embedded with auxiliary column teeth at intervals between its main column teeth. The height of the auxiliary column teeth is lower than that of the main column teeth. When the drill bit drills a hole, the main column teeth will crush the rock, and the crushed rock will move at high speed, and the auxiliary column teeth can further crush the rock.

[0004] The above-mentioned existing technical solutions have the following defects:

[0005] When using the above-mentioned drill bit to drill rocks, the drill body rotates around its axis and moves along its axis to squeeze the rock, wherein the main column and the auxiliary column crush the rock. However, the crushed rock fragments are simultaneously subjected to the squeezing force of the drill body end face, resulting in compaction of the rock fragments. As a result, the efficiency of the rock fragments flowing to the wing body and the powder discharge trough is extremely low, thereby reducing the efficiency of the rock drilling operation. Summary of the Invention

[0006] The purpose of the present invention is to provide a trolley drill bit structure, in which the drainage grooves on the drill body further improve the discharge efficiency of rock powder during rotation, thereby improving the rock drilling operation efficiency.

[0007] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0008] A trolley drill bit structure includes a drill body and a wing body, wherein top teeth are circumferentially arranged at one end of the drill body for crushing rock, and side teeth are circumferentially arranged at one end of the wing body for crushing rock, a mounting hole is provided at one end of the drill body away from the top teeth, a liquid outlet hole connected to the mounting hole is provided on the drill body and located between the top teeth, and a slag discharge trough is provided on the drill body and located between the top teeth, the slag discharge trough extends radially along the drill body, and the end of the liquid outlet hole away from the mounting hole is located in the slag discharge trough, main slag discharge troughs are circumferentially arranged on the wing body, the main slag discharge troughs extend circumferentially along the drill jack, and one end of the main slag discharge trough is connected to the slag discharge trough.

[0009] By adopting the above technical solution, after the drill bit is installed and fixed on the power equipment, the drill bit rotates, and the top teeth and the side teeth simultaneously break the rock mass. The rock mass broken by the top drill enters the slag discharge groove. High-pressure water is introduced into the liquid outlet hole through the installation hole. The water flow drives the broken rock mass to flow, so that continuously broken rock mass enters the slag discharge groove, avoiding the broken rock mass being compacted again by the end of the drill body, improving the discharge efficiency of the rock powder. At the same time, the rock powder enters the main slag discharge groove through the slag discharge groove, further improving the discharge efficiency of the rock powder, and thus improving the rock drilling efficiency.

[0010] The present invention is further configured that: auxiliary slag discharge grooves are formed on the wing body and between the side teeth, and the auxiliary slag discharge grooves are arranged in parallel with the main slag discharge groove.

[0011] By adopting the above technical solution, the auxiliary slag discharge grooves are located between the side teeth and parallel to the main slag discharge groove. Auxiliary slag discharge grooves are arranged between adjacent main slag discharge grooves. Part of the rock powder formed by the side teeth breaking the rock mass enters the auxiliary slag discharge grooves, improving the powder discharge amount and thus improving the rock drilling efficiency.

[0012] The present invention is further configured that: a drainage groove communicating with the slag discharge groove at one end is formed on the drill body, and the drainage groove extends towards the auxiliary slag discharge groove.

[0013] By adopting the above technical solution, when the drill bit rotates, the rock powder flows into the slag discharge groove. However, due to the different extending direction of the slag discharge groove and the rotation direction of the drill bit, part of the rock powder flows towards the side wall of the slag discharge groove and enters the drainage groove. The drainage groove makes the rock powder flow towards the auxiliary slag discharge groove, thus improving the powder discharge efficiency and the rock drilling efficiency. At the same time, it avoids the impact and extrusion of the rock powder on the side wall of the slag discharge groove, reduces the stress concentration on the drill body, and thus achieves the purpose of protecting the drill body and improving the service life of the drill body.

[0014] The present invention is further configured that: the opening depth of the drainage groove gradually decreases from the slag discharge groove towards the auxiliary slag discharge groove, and the depth of the end of the drainage groove communicating with the slag discharge groove is set to be equal to the depth of the slag discharge groove.

[0015] By adopting the above technical solution, the structure of the original wing body is not damaged when the drainage groove is opened, thus ensuring the fixing strength of the side teeth on the wing body, and a wing body with the largest diameter can be set on the side teeth to ensure the rock drilling efficiency.

[0016] The present invention is further configured that: the wing body includes a first inclined surface and a second inclined surface, the side teeth are fixed on the first inclined surface, and the drainage groove penetrates through the first inclined surface.

[0017] By adopting the above technical solution, when the drainage groove is provided, the wing part is occupied by the drainage groove. However, at the same time, the fluidity of the rock powder passing through the drainage groove to the auxiliary slag discharge groove is increased. The rock powder moves between the side teeth through the drainage groove and is then pushed into the auxiliary inclined slag groove by the side teeth, improving the efficiency of powder discharge and thus ensuring the efficiency of rock drilling.

[0018] The present invention is further configured such that: a central groove for communicating with the slag discharge groove is provided on the drill bit.

[0019] By adopting the above technical solution, when the rock powder formed after the top teeth break the rock mass enters the central groove, the central groove can quickly accommodate the rock powder. Then, the rock powder flows through the central groove into the slag discharge groove, further reducing the extrusion of the rock powder between the drill body and the rock mass and improving the fluidity of powder discharge.

[0020] The present invention is further configured such that: internal teeth are provided in the central groove, and the internal teeth are arranged deviating from the axis of the drill body.

[0021] By adopting the above technical solution, when the rock powder enters the central groove, the internal teeth synchronously stir the rock powder in the central groove, preventing excessive rock powder from forming lumps in the central groove and enabling the rock powder to flow stably into the slag discharge groove, improving the stability of powder discharge.

[0022] The present invention is further configured such that: one side of the drill body facing the central groove is provided with an arc chamfer surface.

[0023] By adopting the above technical solution, both ends of the arc chamfer surface extend towards the slag discharge groove, increasing the size of the communication opening between the central groove and the slag discharge groove. And due to the smooth nature of the arc chamfer surface, the resistance to the flow of the rock powder into the slag discharge groove is reduced, improving the smoothness of powder discharge.

[0024] In summary, the beneficial technical effects of the present invention are as follows:

[0025] Through the improvement of adding a drainage groove to the head of the drill body and reducing the empty surface on the top of the pant body, the effective fluidity of water flow in the slag discharge groove and the drainage groove is achieved, enabling the broken rock powder to be discharged in time and obtaining the effect of fast powder discharge;

[0026] The improved drill bit has a higher drilling speed due to fast powder discharge and reduces the power requirement for the drill rig;

[0027] The improved drill bit has good powder discharge effect, reducing the wear of the drill body and the concentrated stress received, thereby improving the service life of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of Embodiment 1;

[0029] Figure 2It is a schematic diagram of the installation empty position and structure;

[0030] Figure 3 It is a schematic diagram of the structure of the second embodiment;

[0031] Figure 4 It is a schematic diagram of the structure of the third embodiment.

[0032] In the figure, 1 is the drill body; 2 is the installation hole; 3 is the top tooth; 4 is the central groove; 5 is the internal tooth; 6 is the arc chamfer surface; 7 is the slag discharge groove; 8 is the drainage groove; 9 is the pointed cone part; 10 is the liquid outlet hole; 11 is the wing body; 12 is the first inclined surface; 13 is the second inclined surface; 14 is the side tooth; 15 is the main slag discharge groove; 16 is the auxiliary slag discharge groove. Specific implementation mode

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Embodiment 1:

[0035] As Figure 1 and Figure 2 shown, a trolley drill bit structure includes a drill body 1 and a wing body 11. The drill body 1 is cylindrical and includes a head and a tail. The outer periphery of the head of the drill body 1 extends with a wing body 11. The wing body 11 forms a first inclined surface 12 and a second inclined surface 13. The first inclined surface 12 faces the head, and the second inclined surface 13 faces the tail. At one end of the head of the drill body 1, 3 top teeth 3 are circumferentially spaced. On the first inclined surface 12, 5 side teeth 14 are circumferentially equally spaced, and there is 1 top tooth 3 corresponding between adjacent side teeth 14. At one end of the tail of the drill body 1 and along its axis direction, an installation hole 2 is opened; when the drill bit is fixed on the power equipment through installation, the drill bit rotates, and the top teeth 3 and the side teeth 14 simultaneously realize the crushing effect on the rock mass, improving the rock drilling efficiency of the drill bit.

[0036] At one end of the head of the drill body 1, a central groove 4 and a slag discharge groove 7 are opened. There is 1 slag discharge groove 7 between the top teeth 3. The slag discharge groove 7 is in a semi-circular arc groove shape and extends along the radial direction of the drill body 1. And one end of the slag discharge groove 7 communicates with the central groove 4. And a liquid outlet hole 10 communicating with the installation hole 2 is opened in the slag discharge groove 7. On the wing body 11, a main slag discharge groove 15 is circumferentially spaced. The main slag discharge groove 15 extends along the axial direction of the drill body 1, and one end of the main slag discharge groove 15 communicates with the slag discharge groove 7; when the drill bit works, the rock mass crushed by the top drilling enters the central groove 4 or the slag discharge groove 7. High-pressure water is introduced into the liquid outlet hole 10 through the installation hole 2. The water flow drives the crushed rock mass to flow, so that continuously there is crushed rock mass entering the central groove 4 and the slag discharge groove 7, avoiding the crushed rock mass being compacted again by the end of the drill body 1, improving the discharge efficiency of the rock powder. At the same time, the rock powder enters the main slag discharge groove 15 through the slag discharge groove 7, further improving the discharge efficiency of the rock powder.

[0037] And an internal tooth 5 is fixed in the central groove 4. The central groove 4 is coaxial with the drill body 1, and the internal tooth 5 deviates from the center position of the central groove 4. When rock powder enters the central groove 4, the internal tooth 5 synchronously stirs the rock powder in the central groove 4 to avoid excessive caking of the rock powder in the central groove 4, enabling the rock powder to flow stably into the slag discharge groove 7 and improving the stability of powder discharge.

[0038] Wherein, on one side of the head of the drill body 1 facing the central groove 4, an arc chamfer surface 6 is machined. Both ends of the arc chamfer surface 6 extend towards the slag discharge groove 7, increasing the size of the communication opening between the central groove 4 and the slag discharge groove 7. And due to the smooth nature of the arc chamfer surface 6, the resistance of the rock powder flowing into the slag discharge groove 7 is reduced, improving the smoothness of powder discharge.

[0039] Embodiment 2:

[0040] As Figure 2 and Figure 3 shown, a jumbo drill bit structure includes a drill body 1 and wing bodies 11. The drill body 1 is cylindrical and includes a head and a tail. The outer periphery of the head of the drill body 1 extends with wing bodies 11. A first inclined surface 12 and a second inclined surface 13 are formed on the wing bodies 11. The first inclined surface 12 faces the head, and the second inclined surface 13 faces the tail. At one end of the head of the drill body 1, 3 top teeth 3 are circumferentially arranged at intervals. On the first inclined surface 12, 5 side teeth 14 are circumferentially arranged at equal intervals, and there is 1 top tooth 3 corresponding to each adjacent side tooth 14. At one end of the tail of the drill body 1 and along its axial direction, a mounting hole 2 is opened; when the drill bit is fixed to the power equipment through installation and rotates, the top teeth 3 and the side teeth 14 simultaneously break the rock mass, improving the rock drilling efficiency of the drill bit.

[0041] At one end of the head of the drill body 1, a central groove 4 and a slag discharge groove 7 are opened. One slag discharge groove 7 is arranged between each top tooth 3. The slag discharge groove 7 is in a semi-circular arc groove shape and extends along the radial direction of the drill body 1. One end of the slag discharge groove 7 communicates with the central groove 4, and a liquid outlet hole 10 communicating with the mounting hole 2 is opened in the slag discharge groove 7. Main slag discharge grooves 15 are circumferentially arranged at intervals on the wing bodies 11. The main slag discharge grooves 15 extend along the axial direction of the drill body 1, and one end of the main slag discharge grooves 15 communicates with the slag discharge groove 7; when the drill bit works, the rock mass broken by the drill enters the central groove 4 or the slag discharge groove 7. High-pressure water is introduced into the liquid outlet hole 10 through the mounting hole 2. The water flow drives the broken rock mass to flow, so that continuously broken rock mass enters the central groove 4 and the slag discharge groove 7, avoiding the broken rock mass being compacted again by the end of the drill body 1, improving the discharge efficiency of the rock powder. At the same time, the rock powder enters the main slag discharge groove 15 through the slag discharge groove 7, further improving the discharge efficiency of the rock powder.

[0042] And an internal tooth 5 is fixed in the central groove 4. The central groove 4 is coaxial with the drill body 1, and the internal tooth 5 deviates from the center position of the central groove 4. When rock powder enters the central groove 4, the internal tooth 5 synchronously stirs the rock powder in the central groove 4 to avoid the formation of lumps of excessive rock powder in the central groove 4, enabling the rock powder to flow stably into the slag discharge groove 7 and improving the stability of powder discharge.

[0043] Meanwhile, auxiliary slag discharge grooves 16 are circumferentially and spacedly arranged on the wing body 11. The auxiliary slag discharge grooves 16 are located between the side teeth 14 and parallel to the main slag discharge groove 15. One auxiliary slag discharge groove 16 is arranged between adjacent main slag discharge grooves 15. Part of the rock powder formed by the side teeth 14 breaking the rock mass enters the auxiliary slag discharge grooves 16, increasing the powder discharge amount and thus improving the rock drilling efficiency. And drainage grooves 8 are arranged on both sides of the slag discharge groove 7 at the head of the drill body 1. The drainage grooves 8 are communicated with the slag discharge groove 7 and extend in the direction of the auxiliary slag discharge grooves 16. The depth of the drainage grooves 8 is equal to that of the slag discharge groove 7, and the drainage grooves 8 penetrate through the first inclined surface 12 of the wing body 11;

[0044] When the drill bit rotates, the rock powder flows into the central groove 4 and the slag discharge groove 7. However, since the extending direction of the slag discharge groove 7 is different from the rotation direction of the drill bit, part of the rock powder flows to the side wall of the slag discharge groove 7 and enters the drainage grooves 8. The drainage grooves 8 make the rock powder flow in the direction of the auxiliary slag discharge grooves 16, thereby improving the powder discharge efficiency and the rock drilling efficiency. At the same time, it avoids the impact and extrusion of the rock powder on the side wall of the slag discharge groove 7, reduces the stress concentration on the drill body 1, and thus achieves the purpose of protecting the drill body 1 and improving the service life of the drill body 1.

[0045] Wherein, an arc chamfer surface 6 is machined on one side of the head of the drill body 1 facing the central groove 4. Both ends of the arc chamfer surface 6 extend towards the slag discharge groove 7, increasing the size of the communication opening between the central groove 4 and the slag discharge groove 7. And due to the smooth nature of the arc chamfer surface 6, the resistance of the rock powder flowing into the slag discharge groove 7 is reduced, improving the smoothness of powder discharge. And a tapered part 9 is formed between the arc chamfer surface 6 and the inner wall of the drainage groove 8. The tapered part 9 greatly reduces the extrusion stress between the inner wall of the slag discharge groove 7 and the rock powder. At the same time, the tapered part 9 has the function of breaking up the lumped rock powder, improving the discharge stability of the rock powder.

[0046] Embodiment 3:

[0047] As Figure 2 and Figure 4As shown in the figure, a trolley drill bit structure includes a drill body 1 and wing bodies 11. The drill body 1 is cylindrical and includes a head and a tail. The outer periphery of the head of the drill body 1 extends with wing bodies 11. A first inclined surface 12 and a second inclined surface 13 are formed on the wing bodies 11. The first inclined surface 12 faces the head, and the second inclined surface 13 faces the tail. At one end of the head of the drill body 1, 3 top teeth 3 are circumferentially arranged at intervals. 5 side teeth 14 are circumferentially and equally spaced on the first inclined surface 12, and there is 1 top tooth 3 corresponding to each adjacent side tooth 14. An installation hole 2 is opened at one end of the tail of the drill body 1 along its axis direction; when the drill bit is installed and fixed on the power equipment, the drill bit rotates, and the top teeth 3 and the side teeth 14 simultaneously break the rock mass, improving the rock drilling efficiency of the drill bit.

[0048] A central groove 4 and a slag discharge groove 7 are opened at one end of the head of the drill body 1. One slag discharge groove 7 is arranged between the top teeth 3. The slag discharge groove 7 is in a semi-circular arc groove shape and extends along the radial direction of the drill body 1. One end of the slag discharge groove 7 communicates with the central groove 4, and a liquid outlet hole 10 communicating with the installation hole 2 is opened in the slag discharge groove 7. Main slag discharge grooves 15 are circumferentially spaced on the wing bodies 11. The main slag discharge grooves 15 extend along the axial direction of the drill body 1, and one end of the main slag discharge groove 15 communicates with the slag discharge groove 7; when the drill bit works, the rock mass broken by the top drill enters the central groove 4 or the slag discharge groove 7. High-pressure water is introduced into the liquid outlet hole 10 through the installation hole 2. The water flow drives the broken rock mass to flow, so that continuously broken rock mass enters the central groove 4 and the slag discharge groove 7, preventing the broken rock mass from being compacted again by the end of the drill body 1, improving the discharge efficiency of the rock powder. At the same time, the rock powder enters the main slag discharge groove 15 through the slag discharge groove 7, further improving the discharge efficiency of the rock powder.

[0049] An internal tooth 5 is fixed in the central groove 4. The central groove 4 is coaxial with the drill body 1. The internal tooth 5 deviates from the center position of the central groove 4. When the rock powder enters the central groove 4, the internal tooth 5 stirs the rock powder in the central groove 4 synchronously, preventing too much rock powder from forming lumps in the central groove 4, enabling the rock powder to flow stably into the slag discharge groove 7, and improving the stability of powder discharge.

[0050] At the same time, auxiliary slag discharge grooves 16 are circumferentially spaced on the wing bodies 11. The auxiliary slag discharge grooves 16 are located between the side teeth 14 and parallel to the main slag discharge grooves 15. One auxiliary slag discharge groove 16 is arranged between adjacent main slag discharge grooves 15. Part of the rock powder formed by the side teeth 14 breaking the rock mass enters the auxiliary slag discharge grooves 16, increasing the powder discharge amount and thus improving the rock drilling efficiency. Drainage grooves 8 are opened on both sides of the slag discharge groove 7 at the head of the drill body 1. The drainage grooves 8 communicate with the slag discharge groove 7 and extend towards the auxiliary slag discharge grooves 16. The opening depth of the drainage grooves 8 gradually decreases from the slag discharge groove 7 towards the auxiliary slag discharge grooves 16. The depth of the end of the drainage groove 8 communicating with the slag discharge groove 7 is equal to the depth of the slag discharge groove 7, enabling the rock powder to stably enter the drainage grooves 8;

[0051] When the drill bit rotates, the rock powder flows into the central groove 4 and the slag discharge groove 7. However, since the extending direction of the slag discharge groove 7 is different from the rotation direction of the drill bit, part of the rock powder flows to the side wall of the slag discharge groove 7 and enters the diversion groove 8. The diversion groove 8 makes the rock powder flow towards the auxiliary slag discharge groove 16 until the rock powder enters the auxiliary slag discharge groove 16 through the head of the drill body 1, thereby improving the powder discharge efficiency and the rock drilling efficiency. At the same time, it avoids the impact and extrusion of the rock powder on the side wall of the slag discharge groove 7, reduces the stress concentration on the drill body 1, and thus achieves the purpose of protecting the drill body 1 and improving the service life of the drill body 1.

[0052] An arc chamfer surface 6 is machined on one side of the head of the drill body 1 facing the central groove 4. Both ends of the arc chamfer surface 6 extend towards the slag discharge groove 7, increasing the size of the communication opening between the central groove 4 and the slag discharge groove 7. And due to the smooth nature of the arc chamfer surface 6, the resistance of the rock powder flowing into the slag discharge groove 7 is reduced, improving the smoothness of powder discharge. And a tapered portion 9 is formed between the arc chamfer surface 6 and the inner wall of the diversion groove 8. The tapered portion 9 greatly reduces the extrusion stress between the inner wall of the slag discharge groove 7 and the rock powder. At the same time, the tapered portion 9 has the function of crushing the agglomerated rock powder, improving the discharge stability of the rock powder.

[0053] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A trolley drill bit structure, comprising a drill body (1) and a wing body (11), characterized in that: The drill body (1) is provided with top teeth (3) at circumferential intervals at one end thereof for crushing rock mass, and the wing body (11) is provided with side teeth (14) at circumferential intervals at one end thereof for crushing rock mass, and a mounting hole (2) is provided at one end of the drill body (1) away from the top teeth (3), and a liquid outlet hole (10) connected to the mounting hole (2) is provided on the drill body (1) and located between the top teeth (3), and a slag discharge groove (7) is provided on the drill body (1) and located between the top teeth (3), and the slag discharge groove (7) is extended along the radial direction of the drill body (1), and the end of the liquid outlet hole (10) away from the mounting hole (2) is located in the slag discharge groove (7), and main slag discharge grooves (15) are provided at circumferential intervals on the wing body (11), and the main slag discharge groove (15) is extended along the circumference of the drill body (1), and one end of the main slag discharge groove (15) is connected to the slag discharge groove (7); The drill body (1) is provided with a drainage groove (8) whose end is connected to the slag discharge groove (7); an auxiliary slag discharge groove (16) is provided on the wing body (11) and is located between the side teeth (14); the auxiliary slag discharge groove (16) is provided in parallel with the main slag discharge groove (15); the drainage groove (8) extends in the direction of the auxiliary slag discharge groove (16); the depth of the drainage groove (8) gradually decreases from the slag discharge groove (7) to the auxiliary slag discharge groove (16); the depth of the drainage groove (8) at one end connected to the slag discharge groove (7) is equal to the depth of the slag discharge groove (7); the wing body (11) includes a first inclined surface (12) and a second inclined surface (13); the side teeth (14) are fixed on the first inclined surface (12); and the drainage groove (8) is provided through the first inclined surface (12); The drill bit is provided with a central groove (4) for connecting to the slag discharge groove (7); the central groove (4) is provided with internal teeth (5), and the internal teeth (5) are arranged offset from the axis of the drill body (1); a curved chamfered surface (6) is provided on one side of the drill body (1) facing the central groove (4); a pointed cone portion (9) is formed between the curved chamfered surface (6) and the inner wall of the drainage groove (8).

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