Reaming drill rod for mine
By combining a multi-stage progressive hole enlargement structure with guide block slots, the problem of severe drill bit wear during the hole enlargement process in traditional mining drill rods is solved, achieving more stable and efficient hole enlargement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HEXIN PETROLEUM MACHINERY
- Filing Date
- 2025-06-16
- Publication Date
- 2026-04-21
AI Technical Summary
In traditional mining drilling, the drill bit in a single cutting load is too large during the hole reaming process, resulting in severe wear and uneven hole walls.
A multi-stage progressive reaming structure was designed. Through the cooperation of multiple reaming sleeves and guide blocks with slots, the stable connection between the drill assembly and the drill rod is ensured. High-pressure water cooling and chip removal are used to gradually enlarge the hole diameter.
It reduces the single cutting load, lowers drill bit wear, improves the smoothness of the hole wall and the stability of hole enlargement, and avoids the risk of drill bit breakage.
Smart Images
Figure CN224149495U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drill pipes, specifically a reaming drill pipe for mining. Background Technology
[0002] Mining reamers are a common tool in mining drilling operations. They are mainly used to enlarge the borehole diameter or trim the borehole during the mining process. They are particularly important in mining, tunnel construction, and groundwater exploration. A reamer is usually composed of multiple modules, including a reamer bit, a sleeve, and the drill rod body. The reamer rotates to drive the drill bit to cut through the rock strata, thereby gradually increasing the borehole diameter.
[0003] However, the working principle of traditional mining reaming drill rods is to drive the drill rod to rotate at high speed through the drilling machine, and use the reaming tool on the drill bit to drill and enlarge the diameter of the hole. Since the reaming drill bit of the drill rod is only a single bit, during the reaming process, the single drill bit is prone to uneven cutting of the hole wall when rotating at high speed, resulting in insufficient flatness around the hole wall and unevenness. Therefore, the cutting load of the drill bit per cut increases significantly, leading to excessive wear and consumption of the drill bit. Utility Model Content
[0004] The purpose of this utility model is to provide a drilling rod for mining to solve the problems mentioned in the background art.
[0005] The objective of this utility model can be achieved through the following technical solutions:
[0006] A drilling rod for mining includes a drilling rod mechanism, which further includes a drilling rod body. The inner wall of the drilling rod body has a through hole, and a threaded groove is formed on the inner wall of one end of the drilling rod body. A drilling tool assembly for enlarging the diameter of a mining borehole is provided on the outer side of one end of the drilling rod mechanism.
[0007] Preferably, the internal thread of the threaded groove is connected to a connecting stud, and the outer side of the drill rod body near the connecting stud is provided with a guide slot. An internal hexagonal bolt is fixedly connected to the drill rod body near the four guide slots, and a first water spray hole is provided through the outer side of one end of the drill rod body.
[0008] Preferably, the reaming drill assembly includes a first sleeve, one end of which is fixedly connected to an installation plate, and the end of the installation plate away from the first sleeve is fixedly connected to a second sleeve. Guide blocks are fixedly connected to the inner wall of the second sleeve. The first sleeve and the second sleeve are respectively sleeved on the outer side of one end of the drill rod body. The four guide blocks are slidably sleeved inside the four guide slots. The outer side of the first sleeve is fixedly connected to the outer side of the drill rod body by a plurality of internal hexagonal bolts.
[0009] Preferably, the outer side of the second sleeve is provided with a second water spray hole, and the plurality of second water spray holes and the plurality of first water spray holes are aligned with each other.
[0010] Preferably, the mounting plate has fixed holes arranged at equal intervals on the side away from the first sleeve. A first expanding sleeve is fixedly fitted on the outer side of the second sleeve. One side of the first expanding sleeve is close to one end of the mounting plate. The first expanding sleeve is connected to multiple fixed holes on one side of the mounting plate by multiple bolts. Multiple drill bits are fixedly connected to the outer side of the first expanding sleeve.
[0011] Preferably, a second expanding sleeve is fixedly sleeved on the outer side of the second sleeve, and one side of the second expanding sleeve is sleeved on the inner wall of the first expanding sleeve. The second expanding sleeve is connected to multiple fixing holes on one side of the mounting plate by multiple bolts. Multiple drill bits are fixedly connected to the outer side of the second expanding sleeve. A third water spray hole is opened through the outer side of one end of the second expanding sleeve. The multiple third water spray holes and the multiple second water spray holes are aligned with each other.
[0012] Preferably, a third expanding sleeve is fixedly sleeved on the outer side of the second sleeve. The third expanding sleeve is connected to multiple fixing holes on one side of the mounting plate by multiple bolts. One end of the third expanding sleeve is sleeved on the inner wall of the second expanding sleeve. Multiple drill bits are fixedly connected to the outer side of the third expanding sleeve. A third water spray hole is opened through the outer side of one end of the third expanding sleeve. The multiple third water spray holes and the multiple second water spray holes are aligned with each other.
[0013] The beneficial effects of this utility model are:
[0014] 1. This utility model uses a first reaming sleeve, a second reaming sleeve, and a third reaming sleeve connected to the fixing hole of the mounting plate by bolts to form a rigid nested structure. This avoids relative displacement of the multi-layer reaming sleeves due to uneven force during cutting. The first step is to use the third reaming sleeve to initially enlarge the original drill hole. Then, the second reaming sleeve is used to further increase the diameter of the enlarged hole. Finally, the drill bit on the outside of the first reaming sleeve cuts in to enlarge the hole, forming a basic hole with a larger diameter. Compared with single-stage reaming, multi-stage progressive reaming can reduce the single cutting load, reduce drill bit wear, and avoid the risk of excessive hole wall roughness or drill bit breakage due to excessive hole enlargement at one time.
[0015] 2. This utility model achieves rapid alignment of the reaming drill assembly and the drill rod body by sliding the guide block and the guide groove, avoiding drilling offset or eccentricity caused by assembly deviation, and at the same time facilitating disassembly and installation for drill bit replacement. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a structural schematic diagram of the drill rod body and guide groove of this utility model;
[0019] Figure 3 This is a structural schematic diagram of the mounting plate and sleeve of this utility model;
[0020] Figure 4 This is a structural schematic diagram of the disassembled hole-reaming drill assembly of this utility model.
[0021] The reference numerals in the figure are as follows: 1. Drill rod mechanism; 11. Drill rod body; 12. Guide groove; 13. Threaded groove; 14. Connecting stud; 15. Socket head cap bolt; 16. First water jet hole; 2. Reamer assembly; 21. First sleeve; 22. Mounting plate; 23. Fixing hole; 24. Second sleeve; 25. Guide block; 26. Second water jet hole; 27. First reaming sleeve; 28. Drill bit; 29. Second reaming sleeve; 210. Third water jet hole; 211. Third reaming sleeve. Detailed Implementation
[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0023] like Figures 1 to 3 As shown, a drilling rod for mining includes a drilling rod mechanism 1, which also includes a drilling rod body 11. The inner wall of the drilling rod body 11 is formed by a through hole, and a threaded groove 13 is formed on the inner wall of one end of the drilling rod body 11. A drilling tool assembly 2 for enlarging the diameter of a mining borehole is provided on the outer side of one end of the drilling rod mechanism 1.
[0024] In a specific embodiment, when the drilling rig is started, the rotational power transmitted to the drill rod is transmitted to the drill rod body 11 through the connecting stud 14. The rotational power drives the drill bit 28 to drill a hole. As the drill rod continues to work, the hole-reaming tool assembly 2 gradually enlarges the hole diameter.
[0025] As a technical optimization of this utility model, the internal thread of the threaded groove 13 is connected to the connecting stud 14, and the drill rod body 11 is provided with guide slots 12 on the outer side of one end near the connecting stud 14. The drill rod body 11 is fixedly connected with hexagonal bolts 15 near the four guide slots 12, and the outer side of one end of the drill rod body 11 is provided with a first water spray hole 16.
[0026] In a specific embodiment, the connecting stud 14 is connected to the threaded groove 13 at one end of the drill rod body 11. The connecting stud 14 is further connected to the other end of the drill rod. During the drilling process, water is sprayed through the first water jet hole 16 to wash away and carry away the chips and debris generated during the drilling process. It can also help reduce the temperature of the drill bit 28 and reduce wear.
[0027] like Figures 1 to 3 As shown, as a technical optimization of this utility model, the reaming drill assembly 2 includes a first sleeve 21, one end of which is fixedly connected to an installation plate 22, and the end of the installation plate 22 away from the first sleeve 21 is fixedly connected to a second sleeve 24. The inner wall of the second sleeve 24 is fixedly connected to guide blocks 25. The first sleeve 21 and the second sleeve 24 are respectively sleeved on the outer side of one end of the drill rod body 11. The four guide blocks 25 are slidably sleeved in the interior of the four guide slots 12. The outer side of the first sleeve 21 is fixedly connected to the outer side of the drill rod body 11 by a plurality of internal hexagonal bolts 15. The outer side of the second sleeve 24 is provided with a second water jet hole 26. The plurality of second water jet holes 26 and the plurality of first water jet holes 16 are aligned with each other.
[0028] In a specific embodiment, the first sleeve 21 and the second sleeve 24 are respectively fitted onto one end of the drill rod body 11. Through the cooperation of the guide block 25 and the guide groove 12, the guide block 25 is further slidably engaged inside the guide groove 12 to ensure the correct positioning of the reaming drill assembly 2 and the drill rod. The first sleeve 21 is fixed to the drill rod body 11 using the internal hex bolt 15 to ensure the stability of the connection. The size of the hole to be reamed is determined according to the requirements. High-pressure water enters the second sleeve 24 from the channel inside the drill rod body 11 through the first water spray hole 16.
[0029] like Figure 3 and Figure 4As shown, in one technical optimization of this utility model, the mounting plate 22 has equidistant through-holes 23 on the side away from the first sleeve 21. A first expanding sleeve 27 is fixedly fitted onto the outer side of the second sleeve 24. One side of the first expanding sleeve 27 is close to one end of the mounting plate 22. The first expanding sleeve 27 is connected to multiple fixing holes 23 on one side of the mounting plate 22 by multiple bolts. Multiple drill bits 28 are fixedly connected to the outer side of the first expanding sleeve 27. A second expanding sleeve 29 is fixedly fitted onto the outer side of the second sleeve 24. One side of the second expanding sleeve 29 is fitted onto the inner wall of the first expanding sleeve 27. The second expanding sleeve 29 is connected to multiple fixing holes 23 on one side of the mounting plate 22 by multiple bolts. Multiple drill bits 28 are fixedly connected to the outer side of the second reaming sleeve 29. A third water spray hole 210 is opened through the outer side of one end of the second reaming sleeve 29. The multiple third water spray holes 210 and multiple second water spray holes 26 are aligned with each other. A third reaming sleeve 211 is fixedly fitted on the outer side of the second sleeve 24. The third reaming sleeve 211 is connected to multiple fixing holes 23 on one side of the mounting plate 22 by multiple bolts. One end of the third reaming sleeve 211 is fitted on the inner wall of the second reaming sleeve 29. Multiple drill bits 28 are fixedly connected to the outer side of the third reaming sleeve 211. A third water spray hole 210 is opened through the outer side of one end of the third reaming sleeve 211. The multiple third water spray holes 210 and multiple second water spray holes 26 are aligned with each other.
[0030] In a specific embodiment, firstly, the first expanding sleeve 27 is installed on the mounting plate 22 using bolts. Then, the second expanding sleeve 29 is fitted inside the first expanding sleeve 27 and secured with bolts. Finally, the third expanding sleeve 211 is fitted inside the second expanding sleeve 29 and secured. Depending on the required expanding hole size, the appropriate number of first expanding sleeves 27, second expanding sleeves 29, and third expanding sleeves 211 are selected and installed. These are then connected to the fixing holes 23 on the mounting plate 22 using bolts. The expanding sleeves are nested sequentially to form a diameter... The increasing hole-reaming structure is followed by high-pressure water entering the second sleeve 24 through the first water spray hole 16 from the channel inside the drill rod body 11. The high-pressure water is sprayed out through the second water spray hole 26 and the third water spray hole 210 to cool the drill bit 28 and remove drill cuttings. The first step is to initially enlarge the original hole through the third hole-reaming sleeve 211, and then continue to increase the hole diameter through the second hole-reaming sleeve 29. The drill bit 28 cuts in through the outside of the first hole-reaming sleeve 27 to enlarge the hole and form a larger diameter basic hole.
[0031] In use, when the drilling rig is started, the rotational power transmitted to the drill rod is transmitted to the drill rod body 11 through the connecting stud 14. The rotational power drives the drill bit 28 to drill. As the drill rod continues to work, the reaming tool assembly 2 gradually enlarges the hole diameter. It is connected to the threaded groove 13 at one end of the drill rod body 11 through the connecting stud 14. Furthermore, one end of the connecting stud 14 is connected to the other end of the drill rod. During drilling, water is sprayed through the first water jet hole 16 to wash away the chips and debris generated during drilling. The removal of the drill bit 28 also helps to reduce its temperature and wear. By fitting the first sleeve 21 and the second sleeve 24 onto one end of the drill rod body 11, and through the cooperation of the guide block 25 and the guide groove 12, the guide block 25 is further slidably engaged inside the guide groove 12, ensuring the correct positioning of the reaming tool assembly 2 and the drill rod. The first sleeve 21 is fixed to the drill rod body 11 using an internal hex bolt 15 to ensure the stability of the connection. The reaming is carried out according to the required hole size, and high-pressure water flows from inside the drill rod body 11. The water flow enters the second sleeve 24 through the first spray hole 16. The first expanding sleeve 27 is installed on the mounting plate 22 using bolts. The second expanding sleeve 29 is then fitted inside the first expanding sleeve 27 and secured with bolts. Finally, the third expanding sleeve 211 is fitted inside the second expanding sleeve 29 and secured. Depending on the required expanding hole size, the appropriate number of first expanding sleeves 27, second expanding sleeves 29, and third expanding sleeves 211 are selected and installed. They are then connected to the fixing holes 23 of the mounting plate 22 using bolts, with each expanding sleeve nested sequentially. This forms an enlarged hole structure with increasing diameter. Then, high-pressure water enters the second sleeve 24 through the first water spray hole 16 from the channel inside the drill rod body 11. The high-pressure water is sprayed out through the second water spray hole 26 and the third water spray hole 210 to cool the drill bit 28 and remove drill cuttings. The first step is to initially enlarge the original drill hole through the third enlarged hole sleeve 211, and then continue to increase the enlarged hole diameter through the second enlarged hole sleeve 29. Further, the drill bit 28 cuts in through the outside of the first enlarged hole sleeve 27 to enlarge the hole and form a basic hole with a larger diameter.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.
Claims
1. A mine reaming drill rod characterized by: The system includes a drill rod mechanism (1), which further includes a drill rod body (11). The inner wall of the drill rod body (11) is provided with a through hole. A threaded groove (13) is provided on the inner wall of one end of the drill rod body (11). A hole-enlarging drill assembly (2) for enlarging the diameter of the mine borehole is provided on the outer side of one end of the drill rod mechanism (1).
2. A mine reamer rod as claimed in claim 1, characterized in that: The threaded groove (13) is internally threaded with a connecting stud (14). The drill rod body (11) is provided with guide slots (12) on the outer side of one end near the connecting stud (14). The drill rod body (11) is fixedly connected with an internal hexagonal bolt (15) between the four guide slots (12). The drill rod body (11) is provided with a first water spray hole (16) on the outer side of one end.
3. A mine reamer rod as defined in claim 1, characterized in that: The reaming drill assembly (2) includes a first sleeve (21), one end of which is fixedly connected to an installation plate (22). The end of the installation plate (22) away from the first sleeve (21) is fixedly connected to a second sleeve (24). The inner wall of the second sleeve (24) is fixedly connected to guide blocks (25). The first sleeve (21) and the second sleeve (24) are respectively sleeved on the outer side of one end of the drill rod body (11). The four guide blocks (25) are slidably sleeved inside the four guide slots (12). The outer side of the first sleeve (21) is fixedly connected to the outer side of the drill rod body (11) by multiple internal hexagonal bolts (15).
4. A mine reamer rod as defined in claim 3, characterized in that: The outer side of the second sleeve (24) is provided with a second water spray hole (26), and the multiple second water spray holes (26) and multiple first water spray holes (16) are aligned with each other.
5. A mine reamer rod as defined in claim 3, characterized in that: The mounting plate (22) has fixed holes (23) arranged at equal intervals on the side away from the first sleeve (21). The second sleeve (24) is fixedly fitted with a first expanding sleeve (27). One side of the first expanding sleeve (27) is close to one end of the mounting plate (22). The first expanding sleeve (27) is connected to multiple fixed holes (23) on one side of the mounting plate (22) by multiple bolts. Multiple drill bits (28) are fixedly connected to the outside of the first expanding sleeve (27).
6. A mine reamer rod as defined in claim 5, characterized in that: The second sleeve (24) is fixedly fitted with a second expansion sleeve (29) on its outer side. One side of the second expansion sleeve (29) is fitted onto the inner wall of the first expansion sleeve (27). The second expansion sleeve (29) is connected to multiple fixing holes (23) on one side of the mounting plate (22) by multiple bolts. Multiple drill bits (28) are fixedly connected to the outer side of the second expansion sleeve (29). A third water spray hole (210) is opened through one end of the outer side of the second expansion sleeve (29). The multiple third water spray holes (210) and the multiple second water spray holes (26) are aligned with each other.
7. A mine reamer rod as defined in claim 6, characterized in that: The outer side of the second sleeve (24) is fixedly fitted with a third expanding sleeve (211). The third expanding sleeve (211) is connected to multiple fixing holes (23) on one side of the mounting plate (22) by multiple bolts. One end of the third expanding sleeve (211) is fitted on the inner wall of the second expanding sleeve (29). Multiple drill bits (28) are fixedly connected to the outer side of the third expanding sleeve (211). A third water spray hole (210) is opened through the outer side of one end of the third expanding sleeve (211). The multiple third water spray holes (210) and the multiple second water spray holes (26) are aligned with each other.