Drill jamming prevention device for drilling operation of anchor rod

Abstract

The invention belongs to the technical field of coal mine tools, and particularly relates to an anti-jamming drill device for drilling operation of an anchor rod, which comprises a guide sleeve fixedly mounted at a hole opening of a roadway drilling hole, an anchor rod main body is arranged in an inner cavity of the guide sleeve, and a jamming correction mechanism is arranged in the inner cavity of the guide sleeve. The technical means that the guide sleeve is matched with the drill jamming correction mechanism is adopted, the state of the anchor rod body is judged by observing the sliding distance of the rolling balls, the contact states of the rolling balls at the top and the bottom of one side of the box body and the outer wall of the anchor rod body are switched through rotation of the inclined plates at the corresponding positions, and therefore accurate fine adjustment can be conveniently conducted on the anchor rod body; and therefore, the mounting precision of the anchor rod main body is improved, the construction quality is guaranteed, the equipment can dynamically adjust anchor rod deviation and angle deviation under complex geological conditions, and compared with a traditional fixed guiding mode, the equipment can better adapt to hole wall irregularity and deflection, and the drilling tool jamming risk is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine tools, and in particular relates to an anti-drilling device for anchor bolt hole rotation operations. Background Art

[0002] The sides of coal mine tunnels are prone to spalling under the influence of factors such as mine pressure and geological structural stress. By implementing anchor rod drilling operations on both sides of the tunnel and installing the anchor rod body, the anchor rod body can be deeply inserted into the stable rock mass. With the help of the bonding force between the anchor rod body and the hole wall and its own pull-out resistance, the unstable loose surrounding rock on both sides can be effectively connected with the deep stable rock mass to form an overall bearing structure, which can limit the deformation and displacement of the surrounding rock and enhance the stability of the two sides.

[0003] The installation of the anchor rod body mainly includes the steps of preparation, drilling, installation of the anchor rod body and grouting. First, construction preparations must be made, design requirements must be clarified, materials and equipment must be prepared, and the construction site must be cleaned and measured and laid out. Next, drilling operations must be carried out according to the design parameters, and debris in the hole must be cleaned after completion. Subsequently, the anchor rod body must be inserted into the drill hole, and the insertion accuracy can be ensured with the help of a guide sleeve. Finally, an anchoring agent must be injected into the hole, and after solidification, the anchor rod body must be tightly combined with the surrounding rock to form a stable support structure.

[0004] When installing the anchor rod body, although the guide sleeve can reduce conventional drill sticking, under complex geological conditions such as faults and folds, due to the uneven distribution of rock hardness and cracks, its fixed guiding method cannot adapt to the irregularities and deviations of the hole wall caused by geological changes, causing the anchor rod body to easily rub and collide violently with the hole wall, which will eventually cause drill sticking. Summary of the Invention

[0005] The object of the present invention is to provide an anti-drilling device for anchor rod drilling operations to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an anti-drilling device for anchor bolt rotation hole operation, comprising a guide sleeve fixedly installed at the opening of the tunnel drilling hole, the inner cavity of the guide sleeve being provided with an anchor bolt body, the inner cavity of the guide sleeve being provided with a drill-stuck deviation correction mechanism, the drill-stuck deviation correction mechanism comprising a plurality of fixed sleeves fixedly installed in the inner cavity of the guide sleeve at equal distances, an inclined plate being rotatably connected to one side of the fixed sleeve, at least two box bodies being fixedly installed on a side of the inclined plate away from the fixed sleeve, the inner cavity of the box body being slidably connected to a ball seat, a supporting spring fixedly connected to the ball seat being fixedly installed on the inner wall of the box body, a rolling ball being rollingly connected to the side of the ball seat away from the box body, the rolling ball in the box body at the top of the inclined plate being away from the outer wall of the anchor bolt body, and the rolling ball in the box body at the bottom of the inclined plate abutting against the outer wall of the anchor bolt body; The inner cavity of the guide sleeve is also provided with an adjustment component for rotating the inclined plate. By rotating the inclined plate, the state of the rolling balls at the top and bottom of one side of the box body contacting the outer wall of the anchor rod body is switched, thereby facilitating the correction of the anchor rod body.

[0007] Preferably, the adjusting assembly includes a sliding column slidably connected to the inner cavity of the fixed sleeve, the top of the sliding column is rotatably connected to the inclined plate, a fixed ring is fixedly installed between the two inner side walls of the guide sleeve, and the same number of arc-shaped inclined push blocks as the sliding columns are rotatably connected on the fixed ring, the sliding column abuts against the inclined surface of the arc-shaped inclined push block, and the arc-shaped inclined push block is rotated so that it can rotate around the fixed ring. At this time, the sliding column abutting against the inclined surface of the arc-shaped inclined push block will be forced to move upward along the inclined surface of the arc-shaped inclined push block due to the change in height of its inclined surface.

[0008] Preferably, the inclination angle of the arc-shaped inclined push block gradually increases along the arc direction of the fixed ring.

[0009] Preferably, a shift rod is fixedly mounted on a side of the arc-shaped inclined push block away from the fixed ring.

[0010] Preferably, an arc-shaped groove for the shifting rod to rotate is formed at the bottom of the fixed ring.

[0011] Preferably, a handle is fixedly mounted on one end of the shift rod away from the arc-shaped inclined push block.

[0012] Preferably, a positioning pin is provided in the inner cavity of the handle, and the fixing ring and the handle are limited by the positioning pin.

[0013] Preferably, the plurality of fixing sleeves are distributed in an annular array in the inner cavity of the guide sleeve.

[0014] Preferably, the two box bodies are symmetrically distributed on one side of the inclined plate.

[0015] Preferably, a drilling rig is provided below the tunnel, and the anchor rod body is provided in a drill rod clamp of the drilling rig.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention adopts a technical means of cooperating with a guide sleeve and a drill-stuck correction mechanism. The state of the anchor rod body is judged by observing the sliding distance of the ball. The corresponding inclined plate is rotated to switch the state of the ball at the top and bottom of one side of the box body in contact with the outer wall of the anchor rod body, thereby facilitating precise fine-tuning of the anchor rod body, thereby improving the installation accuracy of the anchor rod body and ensuring the construction quality. The equipment can dynamically adjust the offset and angular deviation of the anchor rod body under complex geological conditions. Compared with the traditional fixed guide method, it can better adapt to the irregularity and deflection of the hole wall and reduce the risk of drill sticking.

[0017] 2. The present invention adopts the technical means of cooperating arc-shaped inclined push blocks and sliding columns. Each arc-shaped inclined push block corresponds to each sliding column, and each arc-shaped inclined push block is rotatably connected to the fixed ring, so that the staff can rotate the corresponding arc-shaped inclined push block according to the actual deflection of the anchor rod body, thereby making the equipment easier to use and facilitating the correction of the anchor rod body.

[0018] 3. The present invention adopts the technical means of matching the guide sleeve and the rolling ball. The outer wall of the anchor rod body contacts the rolling ball. The rolling of the rolling ball can reduce the resistance when the anchor rod body is inserted, thereby facilitating the staff to quickly insert the anchor rod body into the drill hole, thereby improving the installation efficiency of the anchor rod body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A three-dimensional diagram of the local structure of the present invention; Figure 3 A three-dimensional diagram of the drill-stuck deviation correction mechanism of the present invention; Figure 4 A three-dimensional diagram of the drill stuck prediction assembly of the present invention; Figure 5 This is a schematic diagram of the internal structure of the booster member of the present invention; Figure 6 It is a bottom view structural schematic diagram of the fixed ring of the present invention.

[0020] In the picture: 1. Guide sleeve; 2. Anchor rod body; 3. Drill-stuck correction mechanism; 31. Drill-stuck pre-judgment assembly; 311. Fixed sleeve; 312. Articulated seat; 313. Inclined plate; 314. Boosting member; 3141. Box body; 3142. Ball seat; 3143. Rolling ball; 3144. Support spring; 315. Sliding column; 316. Connecting plate; 32. Fixed ring; 33. Arc-shaped inclined push block; 34. Driving rod; 35. Arc-shaped groove; 36. Handle; 37. Positioning pin. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figures 1 to 6As shown, an embodiment of the present invention provides an anti-drilling device for anchor rod rotation operations, including a tunnel located under a coal mine, a drilling rig is provided below the tunnel, an anchor rod body 2 is provided in the drill rod clamp of the drilling rig, the drilling rig is used to install the anchor rod body 2 on both sides of the tunnel, a borehole for use with the anchor rod body 2 is provided in the inner cavity of the tunnel, the anchor rod body 2 is inserted deep into the tunnel borehole, a guide sleeve 1 is fixed at the orifice of the tunnel borehole by bolts, and the guide sleeve 1 provides a guiding device for the insertion of the anchor rod body 2, which helps the anchor rod body 2 to be accurately inserted into the borehole.

[0023] The inner cavity of the guide sleeve 1 is provided with a drill correction mechanism 3, which includes a fixed ring 32 fixedly installed between the two inner walls of the guide sleeve 1, and a plurality of drill pre-judgment components 31 are provided in the inner cavity of the guide sleeve 1 and located on the fixed ring 32. The plurality of drill pre-judgment components 31 are equidistantly distributed in a circular array on the fixed ring 32, and the drill pre-judgment component 31 includes a plurality of fixed sleeves 311 fixedly installed in the inner cavity of the guide sleeve 1, and the inner cavity of the fixed sleeve 311 is slidably connected with a sliding column 315. A hinge seat 312 is fixedly installed on the side of the fixed sleeve 311 away from the inner wall of the guide sleeve 1, and the side of the hinge seat 312 away from the guide sleeve 1 is rotatably connected with an inclined plate 313, and a connecting plate 316 is fixedly connected above the sliding column 315. The connecting plate 316 is rotatably connected to one side of the inclined plate 313, and at least two boosters 314 are symmetrically provided on the side of the inclined plate 313 close to the anchor rod body 2.

[0024] The booster 314 includes a box body 3141 fixedly connected to the inclined plate 313, and an inner groove is opened in the inner cavity of the box body 3141. A ball seat 3142 is slidably connected between the two inner side walls of the inner groove, and a support spring 3144 is fixedly installed on the inner wall of the inner groove. The side of the support spring 3144 away from the inner wall of the inner groove is fixedly connected to the ball seat 3142, and the side of the ball seat 3142 away from the support spring 3144 is rollingly connected with a rolling ball 3143 that abuts against the outer wall of the anchor rod body 2.

[0025] To be more specific, the ball 3143 in the top box body 3141 of the inclined plate 313 is away from the outer wall of the anchor rod body 2, and the ball 3143 in the bottom box body 3141 of the inclined plate 313 is in contact with the outer wall of the anchor rod body 2. When the anchor rod body 2 is inserted into the borehole, the anchor head installed at the top of the anchor rod body 2 will squeeze the ball 3143, and the ball 3143 will roll through the contact with the outer wall of the anchor rod body 2. The rolling of the ball 3143 can reduce the resistance of the anchor rod body 2 during insertion, thereby facilitating the staff to quickly insert the anchor rod body 2 into the borehole, and the rolling of the ball 3143 plays a boosting role, thereby improving the installation efficiency of the anchor rod body 2.

[0026] When the angle of the front end of the anchor rod body 2 is adjusted upward or downward by rotating the inclined plate 313 , the rolling ball 3143 can rotate within a corresponding reasonable range, thereby ensuring that a suitable force is generated on the anchor rod body 2 .

[0027] The rotatable range of the rolling ball 3143 matches the inclination of the inclined plate 313, so that the anchor rod body 2 can better adapt to different geological conditions and drilling conditions during the insertion of the drilling hole, thereby ensuring the efficiency and quality of the installation of the anchor rod body 2.

[0028] The same number of arc-shaped inclined push blocks 33 as the sliding posts 315 are rotatably connected to the fixed ring 32. The bottom of the sliding post 315 abuts against the inclined surface of the arc-shaped inclined push block 33. The inclination angle of the arc-shaped inclined push block 33 gradually increases along the arc direction of the fixed ring 32, thereby forming a height difference from one side of the arc-shaped inclined push block 33 to the other side. By rotating the arc-shaped inclined push block 33, it can rotate around the fixed ring 32. At this time, the sliding post 315 abutting against the inclined surface of the arc-shaped inclined push block 33 will be forced to move upward along the inclined surface of the arc-shaped inclined push block 33 due to the height change of its inclined surface.

[0029] More specifically, the state in which the rolling balls 3143 at the top and bottom of one side of the box body 3141 contact the outer wall of the anchor rod body 2 is switched by rotating the inclined plate 313, thereby facilitating deviation correction of the anchor rod body 2.

[0030] A shifting rod 34 is fixedly mounted on one side of the arc-shaped inclined push block 33 away from the fixed ring 32 , and an arc-shaped groove 35 for the shifting rod 34 to rotate is formed at the bottom of the fixed ring 32 .

[0031] A handle 36 is fixedly installed on one end of the lever 34 away from the arc-shaped inclined push block 33. A positioning pin 37 is provided in the inner cavity of the handle 36. The handle 36 and the fixed ring 32 are limited by the positioning pin 37. A positioning hole that cooperates with the positioning pin 37 is provided at the bottom of the fixed ring 32.

[0032] More specifically, the outer peripheral wall of the handle 36 is provided with anti-slip grooves, thereby facilitating use by staff.

[0033] Working principle: First, conduct a comprehensive inspection of the drilling rig, anchor rod body 2 and other components to ensure that there are no problems before starting the installation. This step is to ensure the smooth progress of subsequent installation work and avoid installation failure or safety accidents due to component failure. Then install the guide sleeve 1 to the hole mouth of the tunnel borehole with bolts, and insert the anchor rod body 2 into the borehole of the corresponding tunnel. When inserted, the anchor head passes through the guide sleeve 1. A rolling ball 3143 is provided in the guide sleeve 1. The outer wall of the anchor rod body 2 contacts the rolling ball 3143, so that the rolling ball 3143 rolls. The rolling of the rolling ball 3143 can reduce the resistance of the anchor rod body 2 during insertion, thereby facilitating the staff to quickly insert the anchor rod body 2 into the borehole, and the rolling of the rolling ball 3143 plays a boosting role, thereby improving the installation efficiency of the anchor rod body 2.

[0034] Under complex geological conditions (such as faults and folds), due to the uneven distribution of rock hardness and cracks, the fixed guiding method may not be able to adapt to the irregularity and deflection of the hole wall, resulting in severe friction and collision between the anchor rod body 2 and the hole wall, causing drill jamming. When drill jamming occurs, the direction of deviation of the anchor rod body 2 is determined by observing the sliding distance of each ball 3143 in the guide sleeve 1. If the sliding distance of the ball 3143 on one side is significantly smaller, it means that the anchor rod body 2 is deviated to that side and the resistance on that side is greater.

[0035] After predicting the deflection direction of the anchor rod body 2 according to the sliding distance of the ball 3143, when adjusting the position of the anchor rod body 2, since a plurality of rotatable inclined plates 313 are equidistantly arranged in the inner cavity of the guide sleeve 1, the ball 3143 connected in a rolling manner in the sliding ball seat 3142 in the bottom box body 3141 of the inclined plate 313 abuts against the outer wall of the anchor rod body 2, and the ball 3143 connected in a rolling manner in the sliding ball seat 3142 in the top box body 3141 of the inclined plate 313 is away from the outer wall of the anchor rod body 2. By rotating the inclined plate 313, the ball 3143 in the bottom box body 3141 of the inclined plate 313 is away from the outer wall of the anchor rod body 2, and the ball 3143 in the top box body 3141 of the inclined plate 313 is abutted against the outer wall of the anchor rod body 2. When the anchor rod body 2 is in contact with each other, by comparing the sliding conditions of the rolling balls 3143 at different positions, if it is found that the sliding distances of the rolling balls 3143 at the upper and lower sides or the left and right sides of the anchor rod body 2 in a certain plane are different, it means that the anchor rod body 2 may have an angular deviation. For the case of angular deviation, the angle of the anchor rod body 2 can be adjusted by controlling the rolling balls 3143 at different positions. For example, if the front end of the anchor rod body 2 is tilted upward, the rolling balls 3143 at the upper part of the inner cavity of the guide sleeve 1 can be appropriately expanded outward, and the rolling balls 3143 at the lower part can be appropriately contracted inward, thereby generating a downward force on the anchor rod body 2, causing the front end of the anchor rod body 2 to gradually adjust downward, thereby changing the drilling angle of the anchor rod body 2, making it more in line with the direction of the drilling hole, and avoiding drill jamming due to angle deviation.

[0036] When the corresponding inclined plate 313 is rotated, the limit of the handle 36 is first released, and then the handle 36 is turned to drive the arc-shaped inclined push block 33 to rotate synchronously through the handle 36. By rotating the arc-shaped inclined push block 33, it can rotate around the fixed ring 32. At this time, the sliding column 315 abutting the inclined surface of the arc-shaped inclined push block 33 will be forced to move upward along the inclined surface of the arc-shaped inclined push block 33 due to the change in the height of its inclined surface, and the inclined plate 313 is driven to rotate through the sliding column 315, thereby making it easier for the ball 3143 in the bottom box body 3141 of the inclined plate 313 to move away from the outer wall of the anchor rod body 2, and for the ball 3143 in the top box body 3141 of the inclined plate 313 to abut against the outer wall of the anchor rod body 2.

[0037] Each arc-shaped tilted push block 33 corresponds to each sliding column 315, and each arc-shaped tilted push block 33 is rotatably connected to the fixed ring 32, so that the staff can rotate the corresponding arc-shaped tilted push block 33 according to the actual deflection of the anchor rod body 2, thereby making the equipment easier to use.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-drilling device for anchor bolt drilling operation, comprising a guide sleeve (1) fixedly mounted at the opening of a tunnel drilling hole, wherein an anchor bolt body (2) is provided in an inner cavity of the guide sleeve (1), characterized in that: The inner cavity of the guide sleeve (1) is provided with a drill-stuck correction mechanism, which comprises a plurality of fixed sleeves (311) fixedly installed in the inner cavity of the guide sleeve (1) at equal intervals, one side of the fixed sleeve (311) being rotatably connected to an inclined plate (313), and at least two box bodies (3141) being fixedly installed on a side of the inclined plate (313) away from the fixed sleeve (311), and the inner cavity of the box body (3141) being slidably connected to a ball seat (3142), and the box body A support spring (3144) fixedly connected to the ball seat (3142) is fixedly installed on the inner wall of (3141); a rolling ball (3143) is rollingly connected to the side of the ball seat (3142) away from the box body (3141); the rolling ball (3143) in the top box body (3141) of the inclined plate (313) is away from the outer wall of the anchor rod body (2); and the rolling ball (3143) in the bottom box body (3141) of the inclined plate (313) is in contact with the outer wall of the anchor rod body (2); The inner cavity of the guide sleeve (1) is further provided with an adjustment assembly for rotating the inclined plate (313). By rotating the inclined plate (313), the contact state between the rolling balls (3143) at the top and bottom of one side of the box body (3141) and the outer wall of the anchor rod body (2) is switched, thereby facilitating the deviation correction of the anchor rod body (2).

2. The anti-drilling device for anchor bolt drilling operation according to claim 1, characterized in that: The adjustment assembly includes a sliding column (315) slidably connected to the inner cavity of the fixed sleeve (311), the top end of the sliding column (315) is rotatably connected to the inclined plate (313), a fixed ring (32) is fixedly installed between the two inner side walls of the guide sleeve (1), and the same number of arc-shaped inclined push blocks (33) as the sliding column (315) are rotatably connected on the fixed ring (32), the sliding column (315) abuts against the inclined surface of the arc-shaped inclined push block (33), and the arc-shaped inclined push block (33) is rotated so that it can rotate around the fixed ring (32). At this time, the sliding column (315) abutting against the inclined surface of the arc-shaped inclined push block (33) will be forced to move upward along the inclined surface of the arc-shaped inclined push block (33) due to the change in the height of its inclined surface.

3. The anti-drilling device for anchor bolt drilling operation according to claim 2, characterized in that: The inclination angle of the arc-shaped inclined push block (33) gradually increases along the arc direction of the fixed ring (32).

4. The anti-drilling device for anchor bolt drilling operation according to claim 3, characterized in that: A shifting rod (34) is fixedly mounted on one side of the arc-shaped inclined push block (33) away from the fixed ring (32).

5. The anti-drilling device for anchor bolt drilling operation according to claim 4, characterized in that: The bottom of the fixed ring (32) is provided with an arc-shaped groove (35) for the shifting rod (34) to rotate.

6. The anti-drilling device for anchor bolt drilling operation according to claim 5, characterized in that: A handle (36) is fixedly mounted on one end of the shifting rod (34) away from the arc-shaped inclined push block (33).

7. The anti-drilling device for anchor bolt drilling operation according to claim 6, characterized in that: The inner cavity of the handle (36) is provided with a positioning pin (37), and the fixing ring (32) and the handle (36) are limited by the positioning pin (37).

8. The anti-drilling device for anchor bolt drilling operation according to claim 1, characterized in that: The plurality of fixed sleeves (311) are distributed in an annular array in the inner cavity of the guide sleeve (1).

9. The anti-drilling device for anchor bolt drilling operation according to claim 1, characterized in that: The two box bodies (3141) are symmetrically distributed on one side of the inclined plate (313).

10. The anti-drilling device for anchor bolt drilling operation according to claim 1, characterized in that: A drilling rig is provided below the tunnel, and the anchor rod body (2) is provided in a drill rod clamp of the drilling rig.

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