A kind of coal mine underground anchor rod drilling machine drill rod guiding adjustable device
By adopting a combined structure of support base, mounting base, locking component and guide sleeve in the underground anchor drilling rig of coal mine, longitudinal fine adjustment and rolling friction of the guide sleeve are achieved, which solves the problems of inflexible drill rod position adjustment and high frictional resistance, and improves drilling accuracy and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENHUA SHENDONG COAL GRP
- Filing Date
- 2025-09-15
- Publication Date
- 2026-07-28
AI Technical Summary
The existing drill rod guiding device of underground anchor drilling rigs in coal mines lacks flexibility in adjusting the drill rod position, making it difficult to accurately align with the drilling position. In addition, the high frictional resistance between the guide wheel and the drill rod affects the flexibility of the drill rod's extension and retraction, reducing drilling efficiency.
The system employs a combination structure of support base, mounting base, locking element, guide sleeve, and rolling element to achieve longitudinal fine adjustment and rolling friction of the guide sleeve. By installing rolling elements inside the steel ring, frictional resistance is reduced, enhancing the longitudinal position adjustment and verticality control of the drill pipe.
It improves the drilling accuracy and efficiency of drill pipe in complex downhole environments, reduces wear between drill pipe and guide sleeve, adapts to the drilling needs of roadways at different heights, and enhances drilling verticality and operational flexibility.
Smart Images
Figure CN224566038U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of coal mining technology, specifically relating to an adjustable guide device for the drill rod of an underground anchor drilling rig in a coal mine. Background Technology
[0002] In coal mine mining operations, mine bolt drilling rigs are the core drilling equipment for roadway bolt support projects. Through the continuous operation of drilling, bolt delivery, and anchoring, they play a crucial role in improving roadway support effectiveness, reducing support costs, and accelerating roadway construction. However, the drill rod guide device, as an important component of the bolt drilling rig, directly affects the accuracy and operational flexibility of the drill rod. The structural defects of existing guide devices have become a key issue restricting construction efficiency.
[0003] For example, patent CN218030058U discloses a drill rod guiding device for anchor drilling rigs. Its core structure includes a guide mounting base, a longitudinally movable lifting mounting base, a central guide wheel frame, and symmetrical swing arms on both sides. A drive cylinder moves the lifting mounting base, causing the upper ends of the swing arms to close inwards or open outwards. The guide wheels on the central guide wheel frame and the swing arms then compress and guide the drill rod. While this solution provides basic guiding support and ensures drilling quality to a certain extent, it still has shortcomings in actual underground coal mine operations.
[0004] The drill rod position adjustment lacks flexibility and is difficult to precisely align with the borehole position: This solution uses a structure with three pairs of guide wheels to "squeeze" the drill rod for guidance, allowing only rotational adjustment around the drill rod's axis, and cannot achieve independent longitudinal displacement adjustment of the drill rod. Furthermore, the underground environment of coal mines is complex, and the borehole position often needs to be fine-tuned according to the distribution of rock strata in the roadway. The existing fixed installation design is difficult to adapt to the position adjustment requirements, easily leading to deviations between the drill rod and the borehole position, increasing the probability of rework.
[0005] The high frictional resistance between the guide wheels and the drill pipe affects the flexibility of the drill pipe's extension and retraction: Drilling requires continuous axial extension and retraction, but the three pairs of guide wheels in this design contact the drill pipe via a "press-fit" method. During axial movement of the drill pipe, continuous sliding friction occurs between the guide wheels and the drill pipe surface. Over long-term operation, this not only exacerbates wear on the drill pipe and guide wheels but also creates significant resistance, hindering the drill pipe's extension and retraction, reducing drilling efficiency, and even causing drill pipe wobbling due to uneven frictional resistance, affecting the verticality of the borehole. Utility Model Content
[0006] This utility model aims to solve at least one of the technical problems existing in the prior art or related technologies.
[0007] To address the aforementioned problems, this application provides an adjustable drill rod guide device for underground anchor drilling rigs in coal mines, comprising:
[0008] The support base has an installation cavity inside;
[0009] The mounting base is disposed within the mounting cavity and is slidable along the height direction of the support base;
[0010] A locking element is disposed between the support base and the mounting base for fixing the mounting base;
[0011] A guide sleeve is disposed on the mounting base. A guide hole is provided in the middle of the guide sleeve. A steel ring is disposed in the guide hole. Several mounting grooves are spaced apart on the inner circumference of the steel ring. A first rolling element is disposed in the mounting groove.
[0012] Optionally, the first rolling element is a ball bearing.
[0013] Optionally, a sliding groove is provided in the guide hole, and a second rolling element is provided in the sliding groove and located between the guide hole and the steel ring.
[0014] Optionally, the second rolling element is a roller.
[0015] Optionally, the locking element includes a positioning pin, the support base has first fixing holes on both sides, the mounting base has second fixing holes spaced apart along the height direction of the support base, and the positioning pin passes through the first fixing holes and the second fixing holes and is disposed on the support base.
[0016] Optionally, a guide rod is provided at the bottom of the mounting cavity, and the mounting base is slidably connected to the guide rod.
[0017] Optionally, limiting plates are provided on both sides of the bottom of the mounting base, and the limiting plates are engaged in the mounting cavity.
[0018] Optionally, a lateral translation structure is provided between the mounting base and the guide sleeve.
[0019] Optionally, the lateral translation structure includes:
[0020] A guide rail is provided on the mounting base;
[0021] A sliding seat, which is slidably disposed on the guide rail, and a guide sleeve disposed on the sliding seat;
[0022] A limiting bolt passes through the sliding seat and contacts the guide rail.
[0023] Optionally, it may also include fixing ears, which are disposed on both sides of the support base.
[0024] Beneficial effects:
[0025] The adjustable drill rod guide device for an underground anchor drilling rig provided in this embodiment of the present invention can move along the height direction of the support seat via the mounting base, thereby enabling fine adjustment of the guide sleeve in the longitudinal direction. By installing a first rolling element inside the steel ring, when the drill rod passes through the guide hole of the guide sleeve, it will contact the first rolling element in the mounting groove of the steel ring, converting the traditional sliding friction into rolling friction, significantly reducing the resistance during the extension and retraction of the drill rod, reducing the wear between the drill rod and the guide sleeve, avoiding drill rod shaking caused by uneven friction, improving drilling efficiency and verticality, and adapting to the operational needs of complex underground tunnel environments in coal mines. Attached Figure Description
[0026] Figure 1 This is the main view of the present invention.
[0027] Figure 2 This is a cross-sectional view of the present invention;
[0028] Figure 3 This is a structural diagram of the locking component of this utility model.
[0029] The reference numerals in the attached figures are as follows:
[0030] 1. Support base; 2. Mounting base; 3. Locking component; 4. Guide sleeve; 5. Steel ring; 6. First rolling element; 7. Second rolling element; 8. First fixing hole; 9. Second fixing hole; 10. Guide rod; 11. Limiting plate; 12. Lateral translation structure; 121. Guide rail; 122. Sliding seat; 123. Limiting bolt; 13. Fixing lug. Detailed Implementation
[0031] In the description of this application, 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.
[0032] 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 one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0033] In this application, unless otherwise expressly 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 connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0035] See also Figures 1-3 As shown, an adjustable drill rod guide device for a coal mine underground anchor drilling rig is provided according to an embodiment of this application, comprising:
[0036] Support base 1, wherein an installation cavity is provided inside the support base 1;
[0037] Mounting base 2, which is disposed in the mounting cavity and can slide along the height direction of the support base 1;
[0038] Locking member 3, which is disposed between the support base 1 and the mounting base 2 for fixing the mounting base 2;
[0039] Guide sleeve 4 is disposed on mounting base 2. A guide hole is provided in the middle of the guide sleeve 4. A steel ring 5 is disposed in the guide hole. Several mounting grooves are spaced apart on the inner circumference of the steel ring 5. A first rolling element 6 is disposed in the mounting groove.
[0040] In this technical solution, the adjustable drill rod guide device for underground anchor drilling rigs in coal mines includes a support base 1, a mounting base 2, a locking element 3, a guide sleeve 4, a steel ring 5, and a first rolling element 6. The mounting cavity of the support base 1 provides sliding space for the mounting base 2, allowing the mounting base 2 to move along the height direction of the support base 1. The locking element 3 is used to fix the position of the mounting base 2 and can adjust the position of the mounting base 2 within the mounting cavity as needed, thereby achieving longitudinal adjustment of the guide sleeve 4. The first rolling element 6 is assembled in the guide hole of the guide sleeve 4 through the mounting groove of the steel ring 5, facilitating the rotation of the drill rod within the steel ring 5 and reducing the frictional resistance of the drill rod. Based on this, when operating anchor drilling rigs in coal mines, if it is necessary to fine-tune the drilling position according to the rock strata distribution in the roadway, the locking piece 3 can be loosened first, and the mounting base 2 can be pushed to slide along the mounting cavity of the support base 1 to the target height. Then, the mounting base 2 can be fixed by the locking piece 3, so as to achieve precise adjustment of the longitudinal position of the drill rod. This solves the problem that traditional guide devices cannot independently adjust the longitudinal displacement of the drill rod and are difficult to align with the drilling position. At the same time, when the drill rod passes through the guide hole of the guide sleeve 4, it will contact the first rolling piece 6 in the mounting groove of the steel ring 5, which will transform the traditional sliding friction into rolling friction. This will greatly reduce the resistance when the drill rod is extended and extended, reduce the wear between the drill rod and the guide sleeve 4, avoid the drill rod shaking caused by uneven friction, improve drilling efficiency and verticality, and adapt to the operation requirements of complex tunnel environments in coal mines.
[0041] Understandably, the sliding range of the mounting base 2 along the height direction of the support base 1 can be set according to the actual working scenario, which can adapt to the drilling needs of roadways of different heights and meet diverse working conditions.
[0042] Understandably, the first rolling element 6 is a ball bearing, which must be made of high-strength and wear-resistant material to ensure that it can withstand the axial pressure and radial friction during drill pipe operation, and maintain stable rolling performance after long-term use, so as to avoid guide failure due to component wear.
[0043] In some examples, 6-8 mounting grooves can be set on the inner circumference of the steel ring 5 and evenly distributed along the circumference of the steel ring 5, so that the first rolling element 6 forms multi-point symmetrical support for the drill rod, further improving the concentricity of the drill rod, reducing the radial sway of the drill rod during the extension and retraction process, and ensuring that the drilling verticality error is controlled within a reasonable range.
[0044] See also Figure 1 As shown, the first rolling element 6 is a ball bearing.
[0045] In this technical solution, the first rolling element 6 is a ball bearing. Its material needs to meet the wear-resistant and impact-resistant requirements of underground coal mines. It is usually made of GCr15 bearing steel. After quenching treatment, the hardness of this material can reach HRC60-65. It can withstand the radial pressure during drill pipe operation and is not easily corroded by underground dust and water vapor, ensuring that it maintains good rolling performance after long-term use. At the same time, the diameter of the ball bearing needs to be precisely matched with the mounting groove of the steel ring 5, so as to ensure that the ball bearing can rotate freely in the groove and avoid the ball bearing from shifting due to excessive gap, which would affect the guiding stability.
[0046] See also Figure 1 As shown, a sliding groove is provided in the guide hole, and a second rolling element 7 is provided in the sliding groove and located between the guide hole and the steel ring 5.
[0047] The second rolling element 7 is a roller.
[0048] In this technical solution, a sliding groove is provided in the guide hole, and multiple second rolling elements 7 are installed between the sliding groove and the steel ring 5. By setting the second rolling elements 7, it is possible to ensure that the second rolling elements 7 roll and guide in the sliding groove, and also to support the rolling between the steel ring 5 and the guide hole, thereby further solving the problem that the traditional rigid fit between the steel ring 5 and the guide hole is prone to jamming and wear due to friction.
[0049] Understandably, when the drill rod rotates and advances at high speed, it will exert a radial impact force on the balls. This force is transmitted to the rollers through the steel ring 5. The rollers, through their cooperation with the sliding groove, distribute the force evenly to the inner wall of the guide hole, avoiding excessive local stress on the steel ring 5 and causing deformation. This ensures that the balls always roll stably in the spherical groove, further improving the verticality of the borehole and adapting to the high impact conditions when drilling in hard rock formations in coal mines.
[0050] Understandably, rollers are usually cylindrical in shape, and the sliding groove needs to be radially opened along the inner wall of the guide hole to ensure that the roller can roll freely and does not fall off.
[0051] See also Figure 3 As shown, the locking component 3 includes a positioning pin, the support base 1 has first fixing holes 8 on both sides, the mounting base 2 has second fixing holes 9 spaced apart along the height direction of the support base 1, and the positioning pin passes through the first fixing holes 8 and the second fixing holes 9 and is mounted on the support base 1.
[0052] In this technical solution, the locking component 3 is a positioning pin. The first fixing holes 8 are located on both sides of the support base 1, and there are multiple second fixing holes 9 spaced apart along the height direction of the support base 1. When the height of the mounting base 2 needs to be adjusted, simply pull out the positioning pin, allowing the mounting base 2 to slide freely along the mounting cavity of the support base 1. At this time, the second fixing holes 9 will move synchronously with the mounting base 2. When the target height is reached, pass the positioning pin through the first fixing holes 8 on both sides of the support base 1 and insert it into the corresponding second fixing holes 9 to rigidly fix the mounting base 2. This is convenient to operate and can be completed by a single person with one hand, making it particularly suitable for rapid positioning in narrow downhole tunnels. Simultaneously, the positioning pin passes through the first fixing holes 8 on both sides of the support base 1, forming bidirectional support, preventing the mounting base 2 from shifting due to unilateral force, and ensuring that the guide hole axis of the guide sleeve 4 is always coaxial with the drill pipe axis.
[0053] It is understandable that the positioning pin may have symmetrical grooves in the middle, and a magnetic ring may be installed in the groove. When the positioning pin is inserted into the second fixing hole 9, the magnetic ring can be magnetically fixed to the second fixing hole 9 to prevent the positioning pin from slipping during use.
[0054] See also Figure 2 As shown, a guide rod 10 is provided at the bottom of the mounting cavity, and the mounting base 2 is slidably connected to the guide rod 10.
[0055] In this technical solution, multiple guide rods 10 are installed on the base of the mounting cavity along the height direction of the support seat 1. A guide hole is opened at the matching position of the mounting seat 2 and the guide rod 10. By setting the guide rod 10, the movement of the mounting seat 2 is limited, ensuring that the mounting seat 2 moves along the height direction of the support seat 1, and ensuring that the axis of the guide hole of the guide sleeve 4 is always coaxial with the axis of the drill rod.
[0056] Understandably, there are four guide rods 10, which are symmetrically installed in pairs at the bottom of the mounting cavity to limit the movement of the mounting base 2.
[0057] See also Figure 2 As shown, the mounting base 2 has limiting plates 11 on both sides of its bottom, and the limiting plates 11 are snapped into the mounting cavity.
[0058] In this technical solution, limit plates 11 are installed on both sides of the bottom of the mounting base 2. The limit plates 11 are engaged in the mounting cavity to limit the height of the moving mounting base 2. When the operator loosens the positioning pin to adjust the height of the mounting base 2, the limit plates 11 are always engaged inside the mounting cavity. The width of the mounting cavity is greater than the width of the mounting base 2. Therefore, the top wall of the mounting cavity can limit the limit plates 11. As the mounting base 2 moves upward, it prevents the mounting base 2 from sliding out of the mounting cavity. This is especially suitable for scenarios where the underground space is dark and the operator's vision is limited, reducing the risk of device damage and safety accidents.
[0059] See also Figure 1 , Figure 2 As shown, a transverse translation structure 12 is provided between the mounting base 2 and the guide sleeve 4.
[0060] The lateral translation structure 12 includes:
[0061] Guide rail 121, the guide rail 121 is disposed on the mounting base 2;
[0062] A sliding seat 122 is slidably disposed on the guide rail 121, and a guide sleeve 4 is disposed on the sliding seat 122;
[0063] The limiting bolt 123 passes through the sliding seat 122 and contacts the guide rail 121.
[0064] In this technical solution, a lateral translation structure 12 is installed between the mounting base 2 and the guide sleeve 4. The lateral translation structure 12 can adjust the guide sleeve 4 in the lateral direction, which can further improve the alignment accuracy of the drill rod installation position. The lateral translation structure 12 includes a guide rail 121, a sliding seat 122, and a limiting bolt 123. The guide rail 121 is mounted on the mounting base 2, and a sliding groove is provided in the middle of its front and rear sides. The sliding seat 122 is slidably mounted on the guide rail 121, and a sliding cavity is provided at its bottom. A slider matching the sliding groove is provided on the opposite side of the sliding cavity, so that the sliding seat 122 can slide stably on the guide rail 121. After the height of the mounting base 2 is adjusted, if it is necessary to fine-tune the lateral position of the guide sleeve 4, the limiting bolt 123 can be loosened to push the sliding seat 122 to slide along the guide rail 121. The sliding seat 122 is rigidly connected to the guide sleeve 4, and its sliding will synchronously drive the guide sleeve 4 to move laterally until the axis of the guide hole is completely aligned with the target drilling position. Then, the limiting bolt 123 is tightened so that its end presses against the surface of the guide rail 121, and the position of the sliding seat 122 is locked by friction. This allows the device to adapt to the drilling needs of complex rock formations in coal mines, further improving the drilling accuracy and operating efficiency of the anchor bolt drilling machine.
[0065] See also Figure 1 As shown, it also includes fixing ears 13, which are disposed on both sides of the support base 1.
[0066] In this technical solution, the fixing ears 13 are installed on both sides of the support base 1. The fixing ears 13 have through holes. The staff can use screws or other means to fix the device to the position where it is needed through the through holes. After use, it can be removed for subsequent reuse.
[0067] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.
Claims
1. An adjustable guide device for drill rods in underground coal mine anchor drilling rigs, characterized in that, include: A support base (1) is provided, wherein an installation cavity is provided inside the support base (1); Mounting base (2), which is disposed in the mounting cavity and can slide along the height direction of the support base (1); A locking member (3) is disposed between the support base (1) and the mounting base (2) for fixing the mounting base (2); A guide sleeve (4) is provided on the mounting base (2). A guide hole is provided in the middle of the guide sleeve (4). A steel ring (5) is provided in the guide hole. Several mounting grooves are spaced apart on the inner circumference of the steel ring (5). A first rolling element (6) is provided in the mounting groove.
2. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 1, characterized in that, The first rolling element (6) is a ball bearing.
3. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 2, characterized in that, A sliding groove is provided in the guide hole, and a second rolling element (7) is provided in the sliding groove and between the guide hole and the steel ring (5).
4. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 3, characterized in that, The second rolling element (7) is a roller.
5. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 1, characterized in that, The locking component (3) includes a positioning pin. The support base (1) has first fixing holes (8) on both sides. The mounting base (2) has second fixing holes (9) spaced apart along the height direction of the support base (1). The positioning pin passes through the first fixing hole (8) and the second fixing hole (9) and is mounted on the support base (1).
6. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 1, characterized in that, A guide rod (10) is provided at the bottom of the mounting cavity, and the mounting base (2) is slidably connected to the guide rod (10).
7. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 1, characterized in that, The mounting base (2) has limiting plates (11) on both sides of its bottom, and the limiting plates (11) are snapped into the mounting cavity.
8. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 1, characterized in that, A lateral translation structure (12) is provided between the mounting base (2) and the guide sleeve (4).
9. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 8, characterized in that, The lateral translation structure (12) includes: A guide rail (121) is disposed on the mounting base (2); A sliding seat (122) is slidably disposed on the guide rail (121), and a guide sleeve (4) is disposed on the sliding seat (122); A limiting bolt (123) passes through the sliding seat (122) and contacts the guide rail (121).
10. The adjustable drill rod guide device for underground anchor drilling rigs in coal mines according to claim 1, characterized in that, It also includes fixing ears (13), which are disposed on both sides of the support base (1).