drill rod

Abstract

This invention relates to the field of coal mine drilling tools, specifically to a drill rod. The drill rod includes a spiral plate, a vibrating eccentric ring, a rod body, and a drill bit. One end of the rod body is connected to the drill bit. The spiral plate is connected to the outer circumferential surface of the rod body and is spirally arranged in the extending direction of the rod body. The vibrating eccentric ring is sleeved on the end of the rod body away from the drill bit. The vibrating eccentric ring includes a circular ring body and an arc-shaped plate. The circular ring body is sleeved on the rod body, and the outer circumferential surface of the circular ring body is connected to the arc-shaped plate. The arc-shaped plate is bent in a direction away from the circular ring body. The drill rod of this invention can avoid the accumulation of debris on the rod body and improve the durability of the drill rod.

Description

Technical Field

[0001] This invention relates to the field of coal mine drilling tools, specifically to a drill rod. Background Technology

[0002] A drill bit is a drilling tool used in coal mines. During drilling operations in coal roadways, drill bits are used to drill holes in the coal face. During drilling, debris easily accumulates between the rod and the auger plate. This debris accumulates and grows larger during drilling, eventually causing the auger plate of the drill bit to break under stress during use, thus requiring frequent replacement of the drill bit. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a drill bit rod that can prevent debris accumulation on the rod body and improve the durability of the drill bit rod.

[0004] An embodiment of the present invention provides a drill rod comprising: a rod body and a drill bit, one end of the rod body being connected to the drill bit; a spiral plate connected to the outer circumferential surface of the rod body, the spiral plate being spirally arranged in the extending direction of the rod body; and a vibrating eccentric ring sleeved on the end of the rod body away from the drill bit, the vibrating eccentric ring comprising a circular ring body and an arc-shaped plate, the circular ring body being sleeved on the rod body, the outer circumferential surface of the circular ring body being connected to the arc-shaped plate, and the arc-shaped plate being bent in a direction away from the circular ring body.

[0005] The drill rod of the present invention can prevent debris from accumulating on the rod body and improve the durability of the drill rod.

[0006] In some embodiments, the angle between the vibrating eccentric ring and the axial direction of the rod is B, and 55°≤B≤80°, and the angle between the axial direction of the rod and the spiral plate is A, and 5°≤A≤55°.

[0007] In some embodiments, the size of the arc-shaped plate in the radial direction of the rod gradually increases away from the drill bit, the size of the annular body in the radial direction of the rod gradually increases away from the drill bit, and the outer peripheral surface of the annular body and the outer peripheral surface of the arc-shaped plate smoothly transition in the extension direction of the rod.

[0008] In some embodiments, the chisel rod further includes a spiral reinforcing plate, the spiral plate having a spiral groove, the spiral groove having a radial dimension of C, where 1mm≤C≤5mm, and a circumferential length of D, where 5mm≤D≤15mm, the spiral reinforcing plate extending into the spiral groove and connected to the spiral plate.

[0009] In some embodiments, the spiral reinforcing plate includes a first segment, a second segment, and a third segment, one end of the first segment being connected to the spiral plate, the other end of the first segment being connected to one end of the second segment, and the other end of the second segment being connected to the third segment.

[0010] The first segment has a first transition surface at the end away from the rod, the second segment has a second transition surface at the end away from the rod, and the third segment has a third transition surface at the end away from the rod. The first transition surface, the second transition surface, and the third transition surface form a smooth curved surface in the circumferential direction of the rod.

[0011] In some embodiments, there are multiple spiral reinforcing plates, each spiral reinforcing plate having multiple spiral grooves, the multiple spiral grooves being arranged at intervals along the extension direction of the rod, or the multiple spiral grooves being arranged at intervals and staggered along the extension direction of the rod.

[0012] In some embodiments, the rod body is provided with an air supply channel, and the rod body is provided with a plurality of purge holes in the circumferential direction. The purge holes are arranged between the spiral plate and the rod body, and the air supply channel communicates with the plurality of purge holes.

[0013] In some embodiments, the purge hole extends radially in the rod body, and the radial dimension of the purge hole gradually decreases in the direction away from the rod body.

[0014] In some embodiments, the drill rod further includes a pneumatic drill connected to the end of the rod away from the drill bit, and the pneumatic drill is connected to the air supply channel.

[0015] In some embodiments, the radial dimension of the rod gradually decreases along the direction adjacent to the drill bit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the drill rod according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the spiral groove according to an embodiment of the present invention.

[0018] Figure label:

[0019] Vibrating eccentric ring 1, circular ring body 11, arc plate 12.

[0020] Spiral plate 2, spiral groove 21,

[0021] Spiral reinforcing plate 3, first section 31, second section 32, third section 33

[0022] Rod body 4, purge hole 41,

[0023] Drill bit 5. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The drill rod of the present invention includes a vibrating eccentric ring 1, a spiral plate 2, a rod body 4, and a drill bit 5. One end of the rod body 4 is connected to the drill bit 5. The spiral plate 2 is connected to the outer circumferential surface of the rod body 4. The spiral plate 2 is spirally arranged in the extension direction of the rod body 4. The vibrating eccentric ring 1 is sleeved on the end of the rod body 4 away from the drill bit 5. The vibrating eccentric ring 1 includes a circular ring body 11 and an arc-shaped plate 12. The circular ring body 11 is sleeved on the rod body 4. The outer circumferential surface of the circular ring body 11 is connected to the arc-shaped plate 12. The arc-shaped plate 12 is bent in a direction away from the circular ring body 11.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, the rod 4 extends in the left-right direction, and the spiral plate 2 is connected to the outer circumference of the rod 4. The spiral plate 2 is spirally arranged on the rod 4 in the left-right direction. The vibrating eccentric ring 1 is sleeved on the left end of the rod 4. The vibrating eccentric ring 1 consists of a circular ring body 11 and an arc-shaped plate 12. The circular ring body 11 is sleeved on the rod 4, and the arc-shaped plate 12 is connected to the circular ring body 11. The arc-shaped plate 12 bends in a direction away from the rod 4. When drilling is performed, the rod 4 moves to the right, and the spiral plate 2 is suitable for drilling the coal wall. At this time, due to the center of gravity, the vibrating eccentric ring 1 makes an eccentric movement, thereby vibrating and discharging the impurities between the spiral plate 2 and the rod 4, and discharging the coal to the left. When the drilling depth is sufficient, the arc-shaped plate 12 contacts the coal seam, and the rod 4 vibrates, vibrating and removing the impurities between the spiral plate 2 and the rod 4. It can be understood that the arc-shaped plate 12 can be integrally formed with the circular ring body 11, thereby improving the structure of the vibrating eccentric ring 1.

[0027] In this embodiment of the invention, the drill rod is provided with a vibrating eccentric ring 1. The vibrating eccentric ring 1 can make eccentric movements during drilling, or vibrate after the vibrating eccentric ring 1 comes into contact with the coal wall. In turn, the vibrating eccentric ring 1 vibrates the rod body 4, thereby preventing impurities from accumulating between the rod body 4 and the spiral plate 2 and improving the stability of the spiral plate 2 in use.

[0028] Furthermore, the angle between the axis of the rod 4 and the spiral plate 2 is A, and 5° ≤ A ≤ 55°. For example, A can be 5°, 15°, 20°, 25°, 30°, 35°, 45°, 50°, or 55°. For instance, when drilling into a hard coal wall, setting A to 5° facilitates drilling and avoids stress concentration, thus improving the wear resistance of the spiral plate 2. When drilling into a softer coal, A can be set to 55°, allowing more coal to be drilled after one rotation of the rod 4, improving drilling efficiency. Alternatively, A can be set to 35°, avoiding stress concentration while ensuring sufficient coal is drilled after one rotation of the rod 4, further improving drilling efficiency.

[0029] The angle B between the axial direction of the vibrating eccentric ring 1 and the rod 4 is 55° ≤ B ≤ 80°. For example, B can be 55°, 60°, 65°, 75°, or 80°. For instance, when drilling into a hard coal wall, setting A to 5° facilitates drilling and reduces drilling resistance. Setting B to 55° further facilitates drilling into the coal wall, reduces the resistance of the vibrating eccentric ring 1 during drilling, and increases the vibration efficiency of the vibrating eccentric ring 1 on the rod 4, thus facilitating the vibration of the rod 4. When drilling into a softer coal, setting A to 55° and B to 80° improves the vibration efficiency and amplitude of the rod 4 while ensuring drilling efficiency. This makes the rod suitable for different operating environments and improves its stability during use.

[0030] In some embodiments, the size of the arc plate 12 in the radial direction of the rod 4 gradually increases away from the drill bit 5, the size of the ring body 11 in the radial direction of the rod 4 gradually increases away from the drill bit 5, and the outer peripheral surface of the ring body 11 and the outer peripheral surface of the arc plate 12 smoothly transition in the extension direction of the rod 4.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the size of the arc plate 12 in the radial direction of the rod 4 gradually decreases from left to right, and the size of the circular body 11 in the radial direction of the rod 4 also decreases from left to right. This allows for a smooth transition between the outer circumference of the rod 4 and the vibration eccentric ring 1, preventing a step difference between the rod 4 and the circular body 11, and between the circular body 11 and the arc plate 12 during drilling, which would affect drilling efficiency and improve the stability and safety of the drill rod during drilling.

[0032] Furthermore, the drill rod also includes a spiral reinforcing plate 3. The spiral plate 2 has a spiral groove 21, and the radial dimension of the spiral groove 21 in the rod body 4 is C, where 1mm ≤ C ≤ 5mm. The size of C can be 1mm, 2mm, 3mm, 4mm, or 5mm. For example, when the hardness of the coal wall is high, the size of A can be set to 5mm, and the size of B can be set to 55°. The length of C can then be set to 5mm, thus facilitating the use of spiral reinforcing plates 3 of different sizes, making it easier to drill holes in the coal wall, thereby improving the wear resistance of the drill rod and increasing its working efficiency.

[0033] Understandably, when drilling into coal walls with low hardness, the angle of A can be set to 55° and the angle of B to 80°. In this case, the length of C can be set to 1mm or 2mm. The drilling requirements can be met by setting the spiral groove 21 and the corresponding spiral reinforcing plate 3, thereby improving the wear resistance of the drill rod, reducing the use and manufacturing cost of the drill rod, and improving the stability of the drill rod.

[0034] Furthermore, the spiral groove 21 has a length D around the four circumferences of the rod body, and 5mm ≤ D ≤ 15mm. D can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, or 15mm. The spiral reinforcing plate 3 extends into the spiral groove 21 and connects to the spiral plate 2. When the coal wall hardness is high, the size of A is set to 5mm, the size of B is set to 55°, and the length of C is set to 5mm. In this case, D can be set to 5mm, thereby improving the structural strength and wear resistance of the spiral plate 2 while meeting drilling requirements, thus improving the stability and safety of the drill rod.

[0035] It is understandable that a fixed proportional relationship can be adopted between C and D, for example, D / C = 3. By setting this proportional relationship, the size of the spiral groove 21 can be determined, and then a spiral reinforcing plate 3 corresponding to the size of the spiral groove 21 can be set, or the spiral reinforcing plate 3 can be adjusted to maintain a smooth transition between the outer circumferential surface of the spiral reinforcing plate 3 and the outer circumferential surface of the spiral plate 2. Both the outer circumferential surfaces of the spiral reinforcing plate 3 and the outer circumferential surface of the spiral plate 2 are smooth curved surfaces, which improves the structural strength of the drill rod while also improving its wear resistance. Furthermore, the size and dimensions of the spiral groove 21 can be adjusted by adjusting the proportional relationship between C and D, thus adapting to different usage environments. Different sizes of spiral reinforcing plates 3 can also be used to match different spiral grooves 21. By setting the spiral reinforcing plate 3, which can be connected to the spiral plate 2 via threads, the structural strength of the drill rod can be improved, and the stability and safety of the drill rod in use can be enhanced.

[0036] In some embodiments, the spiral reinforcing plate 3 includes a first segment 31, a second segment 32, and a third segment 33. One end of the first segment 31 is connected to the spiral plate 2, the other end of the first segment 31 is connected to one end of the second segment 32, and the other end of the second segment 32 is connected to the third segment 33.

[0037] The first segment 31 has a first transition surface at the end away from the rod 4, the second segment 32 has a second transition surface at the end away from the rod 4, and the third segment 33 has a third transition surface at the end away from the rod 4. The first transition surface, the second transition surface, and the third transition surface form a smooth curved surface around the rod 4.

[0038] Specifically, such as Figure 1 As shown, the first segment 31 is welded to the spiral plate 2, the first segment 31 is welded to the second segment 32, the second segment 32 is welded to the third segment 33, and the third segment 33 is welded to the spiral plate 2. It can be understood that the spiral is used to fix the first segment 31, the second segment 32, and the third segment 33 within the spiral groove 21. The end of the first segment 31 furthest from the rod 4 has a first transition surface. This first transition surface can be polished into a smooth curved surface. Similarly, the end of the second segment 32 furthest from the rod 4 has a second transition surface, which can also be polished into a smooth curved surface. The end of the third segment 33 furthest from the rod 4 has a third transition surface, which can also be polished into a smooth curved surface. It is important to note that polishing the first, second, and third transition surfaces into smooth curved surfaces avoids resistance during drilling, improves drilling efficiency, and thus enhances the stability of the drill rod.

[0039] It is understandable that the first segment 31, the second segment 32, and the third segment 33 can be integrally molded to improve the structural strength of the spiral plate 2.

[0040] It is understandable that the spiral reinforcing plate 3 can be made of wear-resistant alloy, thereby improving the stability and safety of the spiral plate 2.

[0041] Furthermore, there are multiple spiral reinforcing plates 3, and the spiral plate 2 is provided with multiple spiral grooves 21. The multiple spiral grooves 21 are arranged at intervals along the extension direction of the rod body 4. For example, the multiple spiral grooves 21 are arranged at intervals along the left and right direction on the spiral plate 2, or the multiple spiral grooves 21 are arranged alternately at intervals along the left and right direction on the spiral plate 2, and the multiple spiral grooves are located on the same axis, or the multiple spiral grooves 21 are arranged at intervals and staggered along the extension direction of the rod body 4 on the spiral plate 2, thereby improving the structural strength of the spiral plate 2 and improving the stability and safety of the drill rod.

[0042] In some embodiments, the rod body 4 is provided with an air supply channel, and the rod body 4 is provided with a plurality of purge holes 41 around its circumference. The purge holes 41 are arranged between the spiral plate 2 and the rod body 4, and the air supply channel is connected to the plurality of purge holes 41.

[0043] Specifically, such as Figure 1 As shown, the air supply channel extends in the left and right direction, and the purge hole 41 extends in the radial direction of the rod body 4. The purge hole 41 is arranged between the spiral plate 2 and the rod body 4. The purge hole 41 is suitable for removing impurities by blowing gas, thereby avoiding the accumulation of impurities between the rod body 4 and the spiral plate 2 of the drill rod and improving the stability and safety of the drill rod.

[0044] In some embodiments, the purge hole 41 extends radially in the rod body 4, and the radial dimension of the purge hole 41 gradually decreases in the direction away from the rod body 4.

[0045] Specifically, the radial dimension of the purge hole 41 gradually decreases in the direction away from the rod body 4, thereby increasing the gas pressure and flow rate out of the purge hole 41, facilitating the removal of impurities between the rod body 4 and the spiral plate 2, and improving the stability and safety of the drill rod. Alternatively, the radial dimension of the purge hole 41 first gradually increases and then gradually decreases in the direction away from the rod body 4, thereby forming a cavity with higher gas pressure. This cavity can temporarily store impurities, and when the rod body 4 extends out of the borehole, the impurities in the cavity are blown out, thereby improving the stability and safety of the drill rod.

[0046] In some embodiments, the drill bit also includes a pneumatic drill connected to the end of the rod 4 away from the drill bit 5 and connected to an air supply channel. The pneumatic drill is connected to the left end of the air channel to supply gas, thereby allowing gas to flow out of the purge hole 41 to remove impurities from the rod 4, improving the stability and safety of the drill bit in use.

[0047] Furthermore, the radial dimension of the rod 4 gradually decreases along the direction adjacent to the drill bit 5. This facilitates the movement of the rod 4 to the right during drilling, gradually increasing the size of the borehole and thus improving drilling efficiency and stability.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples, without contradiction. Although embodiments of the invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the invention.

Claims

1. A chisel rod, characterized in that, include: A rod and a drill bit, wherein one end of the rod is connected to the drill bit; A spiral plate is connected to the outer peripheral surface of the rod body, and the spiral plate is spirally arranged in the extending direction of the rod body; A vibrating eccentric ring is sleeved on the end of the rod away from the drill bit. The vibrating eccentric ring includes a circular ring body and an arc plate. The circular ring body is sleeved on the rod body. The outer circumferential surface of the circular ring body is connected to the arc plate. The arc plate is bent in a direction away from the circular ring body. The vibrating eccentric ring is configured to generate eccentric vibration during drilling, or to generate vibration when the vibrating eccentric ring contacts the coal wall to vibrate the rod body to remove debris between the spiral plate and the rod body.

2. The chisel rod according to claim 1, characterized in that, The angle between the axis of the rod and the spiral plate is A, and 5°≤A≤55°. The angle between the vibrating eccentric ring and the axis of the rod is B, and 55°≤B≤80°.

3. The chisel rod according to claim 2, characterized in that, The size of the arc-shaped plate in the radial direction of the rod gradually increases away from the drill bit, the size of the annular body in the radial direction of the rod gradually increases away from the drill bit, and the outer circumferential surface of the annular body and the outer circumferential surface of the arc-shaped plate smoothly transition in the extension direction of the rod.

4. The chisel rod according to claim 1, characterized in that, It also includes a spiral reinforcing plate, which has a spiral groove. The spiral groove has a radial dimension of C, and 1mm≤C≤5mm. The spiral groove has a circumferential length of D, and 5mm≤D≤15mm. The spiral reinforcing plate extends into the spiral groove and is connected to the spiral plate.

5. The chisel rod according to claim 4, characterized in that, The spiral reinforcing plate includes a first section, a second section, and a third section. One end of the first section is connected to the spiral plate, the other end of the first section is connected to one end of the second section, and the other end of the second section is connected to the third section. The first segment has a first transition surface at the end away from the rod, the second segment has a second transition surface at the end away from the rod, and the third segment has a third transition surface at the end away from the rod. The first transition surface, the second transition surface, and the third transition surface form a smooth curved surface in the circumferential direction of the rod.

6. The chisel rod according to claim 5, characterized in that, The number of spiral reinforcing plates is multiple, and each spiral reinforcing plate is provided with multiple spiral grooves. The multiple spiral grooves are arranged at intervals along the extension direction of the rod, or the multiple spiral grooves are arranged at intervals and alternately along the extension direction of the rod.

7. The chisel rod according to claim 1, characterized in that, The rod body is provided with an air supply channel, and the rod body is provided with multiple purge holes in the circumferential direction. The purge holes are arranged between the spiral plate and the rod body, and the air supply channel is connected to the multiple purge holes.

8. The chisel rod according to claim 7, characterized in that, The purge hole extends radially on the rod, and the radial dimension of the purge hole gradually decreases in the direction away from the rod.

9. The drill rod according to claim 8, characterized in that, It also includes a pneumatic drill, which is connected to the end of the rod away from the drill bit, and the pneumatic drill is connected to the air supply channel.

10. The chisel rod according to claim 1, characterized in that, The radial dimension of the rod gradually decreases along the direction adjacent to the drill bit.

Images