Down-the-hole drill bit and impactor

Abstract

The utility model provides a down-the-hole drill bit. The down-the-hole drill bit comprises a drill bit head part, a drill bit shoulder part and a drill bit rod part which are sequentially arranged in the axial direction. A first powder discharging groove is formed in the periphery of the drill bit head part, a first connecting hole is formed in the drill bit head part, and the first powder discharging groove is communicated with a central channel of the drill bit rod part through the first connecting hole; the drill bit shoulder part comprises a shoulder part body and a step which is formed by extending outwards from the periphery of the shoulder part body; a second powder discharging groove is formed in the periphery of the step, a second connecting hole is formed in the drill bit shoulder part, and the second powder discharging groove is communicated with the center channel through the second connecting hole. Meanwhile, the utility model further provides an impactor. Compared with the prior art, the down-the-hole drill bit and the impactor can better prevent the drill bit from being buried in a construction hole.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a down-the-hole drill bit and an impactor. Background Art

[0002] With the development of industry and the continuous advancement of various infrastructure projects, down-the-hole hammers and drill bits are widely used for drilling operations in projects such as mines, hydropower stations, ports, roads, and tunnels. The hammer utilizes an air compressor to provide high-pressure compressed air, which enters the front and rear chambers of the hammer, generating high-speed reciprocating motion of the piston that impacts the drill bit. Ultimately, the alloy teeth on the drill bit impact and crush the rock, achieving the impact drilling operation. The resulting rock debris is then blown out of the hole bottom by the high-pressure gas discharged from the hammer, ultimately completing the hole.

[0003] However, during drilling construction, some rock formations are extremely unstable. Due to the vibrations generated by the construction, it is easy for gravel to fall from the hole wall, or even the entire construction hole to collapse, and then the drill bit will be buried in the construction hole, making it difficult to remove the drill bit and impactor, which can easily cause economic losses. Utility Model Content

[0004] In view of the technical problem that the drill bit in the prior art is easily buried in the construction hole during drilling, making it difficult to remove products such as the drill bit and the impactor, which is likely to cause economic losses, the utility model provides a down-the-hole drill bit, which adds a step on the shoulder of the drill bit, and is provided with a powder discharge groove on the step. A connecting hole is provided inside the shoulder of the drill bit, and the connecting hole connects the powder discharge groove with the central channel inside the down-the-hole drill bit, thereby introducing the airflow in the central channel into the powder discharge groove, so that the shoulder of the drill bit can also have the function of blowing and removing slag, thereby improving the slag removal effect and efficiency of the down-the-hole drill bit, better avoiding the accumulation of rock slag in the hole, thereby reducing the risk of the drill bit being buried in the construction hole, making it easier to remove products such as the drill bit and the impactor after the construction is completed, and not prone to causing economic losses.

[0005] A down-the-hole drill bit comprises a drill head, a drill shoulder and a drill shaft which are sequentially arranged along the axial direction;

[0006] A first powder discharge groove is formed on the outer periphery of the drill head, and a first connecting hole is formed inside the drill head. The first powder discharge groove is connected to the central channel of the drill shaft through the first connecting hole.

[0007] The drill bit shoulder includes a shoulder body and a step extending outward from the outer periphery of the shoulder body;

[0008] A second row of powder grooves is provided on the outer periphery of the step, a second connecting hole is provided inside the drill shoulder, and the second row of powder grooves is communicated with the central channel through the second connecting hole.

[0009] Preferably, a page groove is further provided on the outer periphery of the step, and the page groove is formed by being recessed from the surface of the step away from the drill head toward the direction close to the drill head.

[0010] Preferably, the page slot is located on one side of the second powder row slot and is communicated with the second powder row slot.

[0011] Preferably, a plurality of page slots are provided, and the page slots are arranged in a one-to-one correspondence with the second powder row slots.

[0012] Preferably, the recessed depths at both ends of the page slot change gradually.

[0013] Preferably, a recessed groove is further provided in the page groove, and an air hole is opened in the recessed groove.

[0014] Preferably, the step surrounds the outer periphery of the shoulder body;

[0015] There are a plurality of second-row powder troughs, and the second-row powder troughs are sequentially spaced apart along the circumference of the step.

[0016] Preferably, the outer diameter of the shoulder body matches the outer diameter of the punch sleeve of the impactor.

[0017] Preferably, along the axial direction, the step is located on one end of the shoulder body close to the drill head.

[0018] An impactor is applied with the down-the-hole drill bit as described in any one of the above.

[0019] Compared with the prior art, the down-the-hole drill bit provided by the present invention includes a drill head, a drill shoulder, and a drill shank arranged in sequence along the axial direction; a first powder discharge groove is provided on the outer periphery of the drill head, a first connecting hole is provided inside the drill head, and the first powder discharge groove is connected to the central channel of the drill shank through the first connecting hole; the drill shoulder includes a shoulder body and a step extending outward from the outer periphery of the shoulder body; a second powder discharge groove is provided on the outer periphery of the step, a second connecting hole is provided inside the drill shoulder, and the second powder discharge groove is connected to the central channel through the second connecting hole. The down-the-hole drill bit is provided with the step added to the drill shoulder, and the second powder discharge groove is provided on the step, and a second connecting hole is also provided inside the drill shoulder, and the second powder discharge groove is connected to the central channel through the second connecting hole. After the airflow enters the down-the-hole drill bit from the central channel, it can flow to the first powder discharge trough and the second powder discharge trough under the guidance of the first connecting hole and the second connecting hole, so that the airflow can be blown out from the drill head and the drill shoulder respectively to discharge the fallen or collapsed gravel into the hole, thereby improving the slag discharge effect and efficiency of the down-the-hole drill bit, better avoiding the accumulation of rock debris in the hole, thereby reducing the risk of the drill bit being buried in the construction hole, and making it easier to remove products such as the drill bit and the impactor after the construction is completed, and not easily causing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] Figure 1 A schematic structural diagram of a down-the-hole drill bit provided in an embodiment

[0022] Figure 2 A schematic cross-sectional view of a down-the-hole drill bit provided in one embodiment;

[0023] Figure 3 For the Figure 2 A schematic diagram of the structure in the direction indicated by line BB is shown;

[0024] Figure 4 A schematic diagram of the end face structure of a drill head provided in one embodiment;

[0025] Figure 5 A schematic structural diagram of a down-the-hole drill bit drilling process provided in one embodiment. DETAILED DESCRIPTION

[0026] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0027] It should be noted that when a component is referred to as being “fixed on”, “mounted on” or “set on” another component, it can be directly on the other component or indirectly set on the other component; when a component is “connected” to another component, or a component is referred to as being “connected to” another component, it can be directly connected to the other component or indirectly connected to the other component.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0030] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0031] The utility model provides a down-the-hole drill bit, which includes a drill head, a drill shoulder, and a drill shank arranged in sequence along the axial direction; a first powder discharge groove is provided on the outer periphery of the drill head, a first connecting hole is provided inside the drill head, and the first powder discharge groove is connected to the central channel of the drill shank through the first connecting hole; the drill shoulder includes a shoulder body and a step extending outward from the outer periphery of the shoulder body; a second powder discharge groove is provided on the outer periphery of the step, a second connecting hole is provided inside the drill shoulder, and the second powder discharge groove is connected to the central channel through the second connecting hole. The down-the-hole drill bit is provided with the step added to the drill shoulder, and the second powder discharge groove is provided on the step, and a second connecting hole is also provided inside the drill shoulder, and the second powder discharge groove is connected to the central channel through the second connecting hole. After the airflow enters the down-the-hole drill bit from the central channel, it can flow to the first powder discharge trough and the second powder discharge trough under the guidance of the first connecting hole and the second connecting hole, so that the airflow can be blown out from the drill head and the drill shoulder respectively to discharge the fallen or collapsed gravel into the hole, thereby improving the slag discharge effect and efficiency of the down-the-hole drill bit, better avoiding the accumulation of rock debris in the hole, thereby reducing the risk of the drill bit being buried in the construction hole, and making it easier to remove products such as the drill bit and the impactor after the construction is completed, and not easily causing economic losses.

[0032] Please refer to Figures 1 to 5 In one embodiment, a down-the-hole drill bit 100 is provided, which is mainly used to solve the problem in the prior art that the down-the-hole drill bit is easily buried in the construction hole during the construction process, making it difficult to remove products such as the drill bit and the impactor, which easily causes economic losses.

[0033] The down-the-hole drill bit 100 includes a drill head 10, a drill shoulder 20, and a drill shank 30, arranged in sequence along the axial direction. A first powder discharge groove 11 is defined on the outer periphery of the drill head 10. A first connecting hole 12 is defined within the drill head 10, connecting the first powder discharge groove 11 to the central channel 31 of the drill shank 30 via the first connecting hole 12. The drill shoulder 20 includes a shoulder body 21 and a step 22 extending outward from the outer periphery of the shoulder body 21. A second powder discharge groove 221 is defined on the outer periphery of the step 22. A second connecting hole 23 is defined within the drill shoulder 20, connecting the second powder discharge groove 221 to the central channel 31 via the second connecting hole 23.

[0034] During slag discharge, the airflow enters from the central channel 31, and then branches out from the first connecting hole 12 and the second connecting hole 23, and is guided to the first powder discharge trough 11 and the second powder discharge trough 221 respectively through the first connecting hole 12 and the second connecting hole 23, and then the fallen or collapsed gravel is discharged into the construction hole 200, so as to prevent the gravel from burying the down-the-hole drill bit 100 in the construction hole 200.

[0035] Understandably, existing drill bits typically only feature a dust removal slot within the drill head to facilitate airflow and slag removal. While capable of some slag removal, this capability is limited. When working in highly unstable rock formations, vibrations from construction can easily cause debris to fall from the borehole wall, or even collapse the entire hole. This can bury the drill bit and prevent its removal, leaving products like the drill bit and impactor in the hole, potentially leading to financial losses.

[0036] The down-the-hole drill bit 100 provided in this embodiment is additionally provided with the step 22 on the drill bit shoulder 20, and the second powder discharge groove 221 is provided on the step 22. At the same time, the second connecting hole 23 is provided in the drill bit shoulder 20, thereby connecting the second powder discharge groove 221 with the central channel 31, so that the drill bit shoulder 20 can also blow out airflow for slag removal. Slag removal through the first powder discharge groove 11 and the second powder discharge groove 221 can increase the slag discharge area of ​​the down-the-hole drill bit 100, improve the slag discharge effect and efficiency, and reduce the risk of the drill bit, hammer, drill rod and other products being buried in the construction hole due to the collapse of the construction hole. In addition, if the construction hole collapses, the gravel can be discharged more effectively, avoiding the scrapping of the construction hole and causing huge property losses. At the same time, the down-the-hole drill bit 100 can also reduce the repeated grinding of gravel in the construction hole, reduce the wear of the drill bit and alloy, and improve the overall life of the drill bit.

[0037] Specifically, in one embodiment, the diameter of the second connection hole 23 is smaller than the diameter of the first connection hole 12. By setting the diameters of the second connection hole 23 and the first connection hole 12 to be different, the diversion of the airflow can be controlled.

[0038] Preferably, in one embodiment, a page groove 222 is further provided on the outer periphery of the step 22, and the page groove 222 is formed by being recessed from the surface of the step 22 away from the drill head 10 toward the drill head 10. It is understandable that, by providing the page groove 222, a cutting edge 223 can be formed at the edge of the page groove 222. If large gravel falls and the airflow cannot directly drive the gravel out of the construction hole, the page groove 222 can act as a blade during the repeated rotation of the down-the-hole drill bit 100, cutting and crushing the gravel so that the gravel can be effectively discharged from the construction hole, further reducing the risk of products such as drill bits, hammers, and drill rods being buried in the construction hole.

[0039] Specifically, in one embodiment, the leaf slot 222 is located on one side of the second powder discharge trough 221 and is in communication with the second powder discharge trough 221. By providing the leaf slot 222 on one side of the second powder discharge trough 221, it is possible to better prevent gravel from clogging the second powder discharge trough 221, thereby further improving the slag discharge capacity.

[0040] More specifically, in one embodiment, the page slots 222 are provided in plurality (at least two), and the page slots 222 are provided in a one-to-one correspondence with the second powder row slots 221. That is, in this embodiment, the page slots 222 and the second powder row slots 221 are each provided in plurality, and each second powder row slot 221 is provided with a corresponding page slot 222.

[0041] Preferably, in one embodiment, the recess depth at both ends of the page groove 222 changes gradually. The recess depth at both ends of the page groove 222 changes gradually, which means that the recess depths at both ends of the page groove 222 are different, and the recess depth from one end to the other end is gradually increasing or gradually decreasing. It is understandable that the gravel falling from the hole wall may be large or small, and this structure can be suitable for gravel of different sizes at the same time, and this structure allows the page groove 222 to present a sloped structure, and can also increase the width of the cutting edge 223, further improving the cutting performance. The recess depth here can be the recess depth of the page groove 222 along the axial and / or radial direction of the step 22. For example, the page groove 222 includes a first end 2221 and a second end 2222; Figure 1 As shown, along the axial direction, the recessed depth of the first end 2221 is greater than the recessed depth of the second end 2222, so that the cutting edge 223 at the edge is inclined; Figure 3 As shown, along the radial direction, the recessed depth of the second end 2222 is greater than the recessed depth of the first end 2221 , so that the cutting edge 223 located on the inner side is inclined.

[0042] Preferably, in one embodiment, a recessed groove 224 is further provided in the page groove 222, and an air hole is provided in the recessed groove 224, and the air hole is connected to the second connecting hole 23 or the central channel 31. The recessed groove 224 and the air hole can make slag discharge smoother, further improving the slag discharge capacity.

[0043] Preferably, in one embodiment, a wear-resistant alloy may be welded or inlaid on the down-the-hole drill bit 100 .

[0044] Preferably, in one embodiment, the step 22 surrounds the outer circumference of the shoulder body 21. A plurality of (at least two) second powder row grooves 221 are provided, and each second powder row groove 221 is sequentially spaced apart along the circumference of the step 22. By providing a plurality of second powder row grooves 221 and distributing them circumferentially, the slag discharge area can be increased, further improving the slag discharge effect and efficiency. More preferably, in one embodiment, along the circumference of the step 22, the spacing between two adjacent second powder row grooves 221 is equal. This structure allows for a more balanced discharge of the airflow.

[0045] Preferably, in one embodiment, the outer diameter of the shoulder body 21 matches the outer diameter of the drill sleeve 300 of the impactor. Matching the outer diameter of the shoulder body 21 with the outer diameter of the drill sleeve 300 of the impactor means that the outer diameter of the shoulder body 21 is the same as or similar to the outer diameter of the drill sleeve 300, so that when the down-the-hole drill bit 100 is connected to the drill sleeve 300, the outer periphery of the shoulder body 21 and the outer periphery of the drill sleeve 300 can be flush, so that no step structure is formed between the shoulder body 21 and the drill sleeve 300, and thus gravel will not accumulate between the shoulder body 21 and the drill sleeve 300.

[0046] Preferably, in one embodiment, along the axial direction, the step 22 is located on one end of the shoulder body 21 close to the drill head 10. In other words, the step 22 is provided close to the drill head 10, so that gravel will not get stuck in the area between the step 22 and the drill head 10.

[0047] Specifically, in one embodiment, a connecting groove 13 is formed on the end surface of the drill head 10 , and the first powder discharge groove 11 is connected to the first connecting hole 12 through the connecting groove 13 .

[0048] Preferably, in one embodiment, a plurality of first powder discharge grooves 11 are provided, and the first powder discharge grooves 11 are sequentially spaced apart along the circumference of the drill head 10, thereby further improving the slag discharge effect and efficiency. More preferably, in one embodiment, the spacing between two adjacent first powder discharge grooves 11 along the circumference of the drill head 10 is equal. This structure allows for more balanced airflow discharge.

[0049] At the same time, in one embodiment, an impactor is also provided, in which the down-the-hole drill bit 100 is applied.

[0050] The above is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the scope of protection of the present invention.

Claims

1. A down-the-hole drill bit, characterized in that: It comprises a drill head, a drill shoulder and a drill shaft which are sequentially arranged along the axial direction; A first powder discharge groove is formed on the outer periphery of the drill head, and a first connecting hole is formed inside the drill head. The first powder discharge groove is connected to the central channel of the drill shaft through the first connecting hole. The drill bit shoulder includes a shoulder body and a step extending outward from the outer periphery of the shoulder body; A second row of powder grooves is provided on the outer periphery of the step, a second connecting hole is provided inside the drill shoulder, and the second row of powder grooves is communicated with the central channel through the second connecting hole.

2. The down-the-hole drill bit according to claim 1, characterized in that A page groove is further provided on the outer periphery of the step, and the page groove is formed by being recessed from the surface of the step away from the drill head toward the direction close to the drill head.

3. The down-the-hole drill bit according to claim 2, characterized in that The page slot is located on one side of the second powder row slot and is communicated with the second powder row slot.

4. The down-the-hole drill bit according to claim 3, characterized in that There are multiple page slots, and the page slots are arranged in a one-to-one correspondence with the second powder row slots.

5. The down-the-hole drill bit according to claim 2, characterized in that: The recessed depths at both ends of the page slot change gradually.

6. The down-the-hole drill bit according to claim 2, characterized in that A recessed groove is further provided in the page groove, and an air hole is opened in the recessed groove, and the air hole is communicated with the second connecting hole or the central channel.

7. The down-the-hole drill bit according to claim 1, characterized in that The step surrounds the outer periphery of the shoulder body; There are a plurality of second-row powder troughs, and the second-row powder troughs are sequentially spaced apart along the circumference of the step.

8. The down-the-hole drill bit according to claim 1, characterized in that The outer diameter of the shoulder body matches the outer diameter of the punch sleeve of the impactor.

9. The down-the-hole drill bit according to claim 1, characterized in that Along the axial direction, the step is located on an end of the shoulder body close to the drill head.

10. An impactor, characterized in that: The invention relates to a down-the-hole drill bit according to any one of claims 1 to 9.

Images