Guide device for drilling roof anchor rod

Abstract

The invention belongs to the technical field of roof anchor rod supporting, and particularly relates to a guide device for roof anchor rod drilling, which comprises a roof and a pneumatic anchor rod drilling machine main body positioned below the roof, a rock wall hole is formed in an inner cavity of the roof, an anchor rod is mounted in the pneumatic anchor rod drilling machine main body, and a guide mechanism is arranged in an inner cavity of the rock wall hole; the guide mechanism comprises a fixed circular ring fixedly mounted at the rock wall hole, at least two arc-shaped limiting plates attached to the inner wall of the rock wall hole are symmetrically and fixedly mounted on one side of the fixed circular ring, and a telescopic pipe is rotationally connected to the position, located between the two arc-shaped limiting plates, of one side of the fixed circular ring; one side of the fixing circular ring is provided with a first-stage fixed-distance telescopic piece enabling the telescopic pipe to extend at a fixed distance, the top of the telescopic pipe is provided with a limiting assembly for fixing the anchor rod, and therefore the anchor rod and the telescopic pipe can move synchronously. The anchor rod can be prevented from deviating from the design position through accurate guiding of the guiding mechanism, and then the anchor rod can conduct anchoring according to the expected angle and depth conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of roof anchor support, and in particular relates to a guide device for roof anchor drilling. Background Art

[0002] Roof anchor support is an important support technology widely used in underground projects such as coal mine tunnels and tunnels to maintain the stability of the roof. By drilling holes in the roof, inserting anchors into the holes and fixing them, the anchoring force of the anchors is used to connect the unstable rock layer of the roof with the deep stable rock layer to form an integral load-bearing structure, thereby improving the stability of the roof and preventing the collapse and deformation of the roof rock layer.

[0003] In roof anchor support, the hole needs to be cleaned after drilling on the roof. After cleaning, the rock around the hole wall is in a relatively unstable state, especially in the fracture zone or soft rock formation, the hole wall is prone to collapse. Timely insertion of anchor rods can support the hole wall, reduce the risk of hole wall collapse, ensure the integrity of the borehole, and create good conditions for subsequent anchoring work.

[0004] However, the supporting effect of the anchor rod on the rock wall hole is mainly concentrated at the position where it is inserted. Its supporting range is limited for the entire length of the borehole. Especially when the borehole depth is large or the rock is highly fragmented, the anchor rod lacks precise guidance, which makes it easy for the anchor rod to deviate from the designed position during the insertion process, making it inconvenient to anchor the anchor rod at the expected angle and depth, thereby reducing its supporting effect on the roof. Summary of the Invention

[0005] The object of the present invention is to provide a guide device for roof anchor drilling to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned objectives, the present invention provides the following technical solutions: a guide device for roof anchor drilling, comprising a roof and a pneumatic anchor drill rig main body located therebelow, the inner cavity of the roof being provided with a rock wall hole, the pneumatic anchor drill rig main body being provided with an anchor rod entering the rock wall hole, the inner cavity of the rock wall hole being provided with a guide mechanism, the guide mechanism comprising a fixed circular ring fixedly installed at the rock wall hole, at least two arc-shaped limit plates symmetrically fixedly installed on one side of the fixed circular ring and fitting with the inner wall of the rock wall hole, a telescopic tube being rotatably connected on one side of the fixed circular ring and located between the two arc-shaped limit plates, a first-level fixed-distance telescopic part for extending the telescopic tube at a fixed distance being provided on one side of the fixed circular ring, the first-level fixed-distance telescopic part being located between the telescopic tube and the arc-shaped limit plate, a limiting assembly for fixing the anchor rod being provided on the top of the telescopic tube, so that the anchor rod can move synchronously with the telescopic tube.

[0007] Preferably, the limiting assembly includes a limiting ring fixedly connected to the top of the telescopic tube, a secondary fixed-distance telescopic part is provided on the top of the limiting ring, a baffle is provided on the top of the secondary fixed-distance telescopic part, at least two fixed sleeves are fixedly installed on the inner wall of the limiting ring, the inner cavity of the fixed sleeve is slidably connected to a sliding sleeve, an arc-shaped clamping plate for clamping the anchor rod is fixedly installed on the side of the sliding sleeve away from the fixed sleeve, one side of the arc-shaped clamping plate is rotatably connected to a connecting rod, and the side of the connecting rod away from the arc-shaped clamping plate is rotatably connected to the bottom of the baffle.

[0008] Preferably, the first-stage fixed-distance telescopic member or the second-stage fixed-distance telescopic member includes at least two outer sleeves, the top of the inner wall of the outer sleeve is fixedly connected to an extrusion spring, and an inner sleeve fixedly connected to the extrusion spring is slidably connected between the two inner side walls of the outer sleeve, and both sides of the inner sleeve are fixedly connected to energy storage springs, and both sides of the inner sleeve are slidably connected to limit blocks fixedly connected to the energy storage springs, and the inner wall of the outer sleeve is provided with a limit groove that cooperates with the limit block.

[0009] Preferably, the outer sleeve in the first-level fixed-distance telescopic member is fixedly connected to the bottom of the telescopic tube, and the inner sleeve is fixedly connected to the top of the telescopic tube; the outer sleeve in the second-level fixed-distance telescopic member is fixedly connected to the top of the limiting ring, and the inner sleeve is fixedly connected to the bottom of the baffle.

[0010] Preferably, the spring compression amount of the extrusion spring in the first-stage fixed-distance telescopic member is greater than the spring compression amount of the extrusion spring in the second-stage fixed-distance telescopic member.

[0011] Preferably, an anchor assist assembly is provided on the side of the fixed ring close to the rock wall hole, and the anchor assist assembly includes at least two connecting plates slidingly connected to both sides of the inner wall of the fixed ring, and the side of the connecting plate away from the inner wall of the fixed ring is rollingly connected to a rotating wheel group in contact with the outer peripheral wall of the anchor.

[0012] Preferably, a support spring fixedly connected to the connecting plate is fixedly installed in the inner cavity of the fixed ring.

[0013] Preferably, the anchor rod includes a rod body arranged in the drill rod clamp of the pneumatic anchor drilling rig, the anchoring end of the rod body is fixedly connected to the anchor head, the free end of the rod body is threadedly connected to the nut, the free end of the rod body is provided with a pad between the nut and the fixed ring, and the free end of the rod body is threadedly connected to a slurry stopper on the side of the pad away from the nut.

[0014] Preferably, a receiving groove matched with the slurry stopper and a rectangular groove matched with the pad are provided on a side of the fixing ring away from the rock wall hole.

[0015] Preferably, a trigger switch electrically connected to the pneumatic anchor drill body is fixedly mounted on one side of the arc-shaped limit plate.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The present invention adopts technical means that cooperate with anchor rods and guide mechanisms. The insertion of anchor rods enables the secondary fixed-distance telescopic member to drive the stop block to move at a fixed distance. The fixed-distance movement of the stop block enables the two arc-shaped clamping plates to clamp and fix the anchor rod. By clamping and fixing it, not only can the anchor rod be prevented from falling downward, but the anchor rod and the telescopic tube can also be moved synchronously. After the anchor rod is clamped and fixed, the anchor rod continues to be inserted. The primary fixed-distance telescopic member drives the telescopic tube to move at a fixed distance through the anchor rod. The fixed-distance movement of the telescopic tube facilitates the equipment to reasonably insert the anchor rod to a fixed depth according to the depth of the rock wall hole, and the precise guidance of the telescopic tube can prevent the anchor rod from deviating from the designed position, facilitates the anchor rod to be anchored at the expected angle and depth, and thus facilitates ensuring the support effect of the anchor rod on the top plate.

[0018] 2. The present invention adopts the technical means of cooperating the pneumatic anchor drill rig body with the telescopic tube. The anchor rod can be sent to the designed depth in the rock wall hole through the telescopic tube by driving the pneumatic anchor drill rig body. This process reduces the risk of hole wall collapse. After it reaches the designed depth, the anchor rod will contact the trigger switch, which makes it convenient to cut off the power supply of the pneumatic anchor drill rig body in time. When the anchor rod reaches the designed depth in the rock wall hole, the anchor rod's slurry stopper and pad will also engage with the accommodating groove and rectangular groove in the fixed ring, which makes it convenient to further ensure the anchoring effect of the anchor rod and avoid the anchor rod from reversing due to external factors.

[0019] 3. The present invention adopts the technical means of cooperating with the fixed ring and the roller group. The roller group rolls by inserting the anchor rod into the inner cavity of the fixed ring, which not only effectively reduces the friction between the two and reduces the insertion resistance, but also provides the anchor rod with a straightening and guiding function, ensuring that the anchor rod is smoothly inserted along the central axis of the fixed ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 Schematic diagram of the bottom structure of the guide mechanism of the present invention;

[0022] Figure 3 For the present invention Figure 2 A partial enlarged view of point A shown;

[0023] Figure 4 It is a structural schematic diagram of the sliding rod of the present invention;

[0024] Figure 5 Schematic diagram of the three-dimensional structure of the guide mechanism of the present invention;

[0025] Figure 6 For the present invention Figure 5 A partial enlarged view of point B is shown;

[0026] Figure 7 This is a schematic diagram of the internal structure of the first-level fixed-distance telescopic member of the present invention;

[0027] Figure 8 Schematic diagram of the top view of the primary fixed-distance telescopic member of the present invention;

[0028] Figure 9 For the present invention Figure 6 Schematic diagram of the internal structure of the connecting sub-section shown.

[0029] In the picture:

[0030] 1. Top plate;

[0031] 2. Rock wall hole;

[0032] 3. Main body of pneumatic anchor drilling rig;

[0033] 4. Rod body; 41. Stop plug; 42. Backing plate; 43. Anchor head; 44. Nut; 45. Receiving groove; 46. Rectangular groove;

[0034] 5. Guide mechanism; 51. Fixed ring; 52. Arc-shaped limit plate; 53. Support plate; 54. Connecting sub-unit; 541. Fixed cylinder; 542. Return spring; 543. Sliding cylinder; 55. Rotating ring; 56. Telescopic tube; 57. Limiting ring; 58. First-stage fixed-distance telescopic member; 581. Outer sleeve; 582. Extrusion spring; 583. Inner sleeve; 584. Inner groove; 585. Limiting block; 586. Limiting groove; 587. Energy storage spring; 59. Second-stage fixed-distance telescopic member; 510. Baffle; 511. Trigger switch; 512. Arc-shaped clamping plate; 513. Connecting rod;

[0035] 6. Sliding rod; 61. Connecting plate; 62. Rotating wheel assembly. DETAILED DESCRIPTION

[0036] 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.

[0037] like Figures 1 to 9As shown, an embodiment of the present invention provides a guiding device for roof anchor drilling, comprising a roof 1 located underground, a pneumatic anchor drill body 3 is arranged below the telescopic roof 1, an anchor rod is arranged in the drill rod clamp of the pneumatic anchor drill body 3, a rock wall hole 2 is opened in the inner cavity of the roof 1, and a guiding mechanism 5 is provided in the inner cavity of the rock wall hole 2. The guiding mechanism 5 includes a fixed circular ring 51 fixedly mounted on one side of the roof 1 and corresponding to the rock wall hole 2 one by one, at least two arc-shaped limit plates 52 that are symmetrically fixedly mounted on one side of the fixed circular ring 51 and located in the inner cavity of the rock wall hole 2 and are in contact with the inner wall of the rock wall hole 2, a support plate 53 is fixedly mounted on the side of the arc-shaped limit plate 52 away from the fixed circular ring 51, and a trigger switch 511 is fixedly mounted on the side of the support plate 53 away from the inner cavity of the rock wall hole 2, and the trigger switch 511 is electrically connected to the pneumatic anchor drill body 3.

[0038] To be more specific, by coordinating the fixed ring 51 and at least two arc-shaped limit plates 52, the anchor rod can be inserted into the inner cavity of the rock wall hole 2 along the designed depth and angle, and the setting of the fixed ring 51 and the two arc-shaped limit plates 52 can reduce the contact between the anchor rod and the wall of the rock wall hole 2, and when the pneumatic anchor drill body 3 drives the anchor rod to transport it to the designed depth in the hole, the power supply of the pneumatic anchor drill body 3 can be cut off in time through the contact between the anchor rod and the trigger switch 511, thereby facilitating the anchor rod to reach the designed depth.

[0039] The anchor rod includes a rod body 4 arranged in the drill rod clamp of the pneumatic anchor drilling rig main body 3, one end of the rod body 4 is the anchoring end, and the other end of the rod body 4 is the free end. The anchoring end of the rod body 4 is provided with an anchoring component, and the anchoring component includes an anchoring head 43 fixedly connected to the anchoring end of the rod body 4, and the free end of the rod body 4 is provided with a fastening component, and the fastening component includes a nut 44 and a pad 42. The nut 44 is threadedly connected to the free end of the rod body 4, and the pad 42 is arranged between the nut 44 and the fixed ring 51. The pad 42 is a rectangular steel plate, and the width of the pad 42 is greater than the outer diameter of the nut 44. Rotating the nut 44 makes it move along the external thread of the rod body 4 toward the pad 42, thereby applying pressure to the pad 42. The free end of the rod body 4 and the side of the pad 42 away from the nut 44 are threadedly connected with a slurry stopper 41.

[0040] A receiving groove 45 cooperating with the grout stopper 41 and a rectangular groove 46 cooperating with the pad 42 are formed on the side of the fixing ring 51 away from the rock wall hole 2 . The receiving groove 45 and the rectangular groove 46 are connected in the inner cavity of the fixing ring 51 .

[0041] An anchor assist assembly is provided on one side of the fixed ring 51 close to the rock wall hole 2. The anchor assist assembly includes at least two sliding rods 6 slidably connected to both sides of the inner wall of the fixed ring 51. Two sliding plates are equidistantly distributed in a circular array in the fixed ring 51. The inner cavity of the fixed ring 51 is provided with a sliding groove for the sliding rod 6 to slide horizontally. A support spring fixedly connected to the sliding rod 6 is fixedly installed on the inner wall of the sliding groove. A connecting plate 61 is fixedly installed on the end of the sliding rod 6 away from the support spring. The side of the connecting plate 61 away from the sliding rod 6 is rollingly connected to a rotating wheel group 62 in contact with the outer peripheral wall of the anchor.

[0042] To be more specific, the rotating wheel group is composed of multiple rotating wheels, which are made of high-strength wear-resistant alloy steel. The rotating wheels are installed on the embedded bearings on the inner wall of the guide sleeve through the wheel axle, thereby ensuring flexible rotation. When the anchor rod is inserted into the inner cavity of the fixed ring 51, it can effectively reduce the friction between the two and reduce the insertion resistance. At the same time, it provides a straightening and guiding function for the anchor rod, ensuring that the anchor rod is smoothly inserted along the central axis of the fixed ring 51.

[0043] A guide sleeve assembly is provided on one side of the fixed ring 51 and between the two arc-shaped limit plates 52. The guide sleeve assembly includes a rotating ring 55 rotatably connected to the fixed ring 51. The centers of the fixed ring 51 and the rotating ring 55 are collinear. A telescopic tube 56 is fixedly installed on the side of the rotating ring 55 away from the fixed ring 51 (the telescopic tube 56 is a bellows or other telescopic tube that can meet the use requirements). A limiting ring 57 is fixedly installed on the side of the telescopic tube 56 away from the rotating ring 55. A first-level fixed-distance telescopic member 58 connected to the limiting ring 57 is provided on the top of the rotating ring 55. A second-level fixed-distance telescopic member 59 is symmetrically provided on the top of the limiting ring 57. The second-level fixed-distance telescopic member 59 or the first-level fixed-distance telescopic member 58 both include an outer sleeve 581. The outer sleeve 581 in the second-level fixed-distance telescopic member 59 is fixedly connected to the top of the rotating ring 55. The outer sleeve 581 in 8 is fixedly connected to the top of the limiting ring 57, the limiting ring 57 is collinear with the center of the rotating ring 55, the top of the inner wall of the outer sleeve 581 is fixedly connected with an extrusion spring 582, and the two inner side walls of the outer sleeve 581 are vertically slidably connected with an inner sleeve 583 fixedly connected to the extrusion spring 582, both sides of the inner sleeve 583 are provided with inner grooves 584, one side of the inner wall of the inner groove 584 is fixedly connected with an energy storage spring 587, and the two inner side walls of the inner groove 584 are horizontally slidably connected with a limiting block 585 fixedly connected to the energy storage spring 587, the inner wall of the outer sleeve 581 is provided with a limiting groove 586 matching the limiting block 585, the inner sleeve 583 in the secondary fixed-distance telescopic member 59 is fixedly connected to the bottom of the limiting ring 57, and the inner sleeve 583 in the primary fixed-distance telescopic member 58 is fixedly installed with a baffle 510 on the side away from the outer sleeve 581.

[0044] More specifically, the spring compression amount of the extrusion spring 582 in the first-stage fixed-distance telescopic member 58 is greater than the spring compression amount of the extrusion spring 582 in the second-stage fixed-distance telescopic member 59, thereby making the entire device more convenient to use.

[0045] An anchor rod limiting portion is provided at the bottom of the baffle 510, and the anchor rod limiting portion includes at least two connecting rods 513 symmetrically connected to the bottom of the baffle 510 for rotation. The inner wall of the limiting ring 57 is provided with a connecting sub-portion 54 used in conjunction with the connecting rod 513. The connecting sub-portion 54 includes a fixed cylinder 541 fixedly mounted on the inner wall of the limiting ring 57, and the inner cavity of the fixed cylinder 541 is slidably connected to the sliding cylinder 543. The side of the sliding cylinder 543 away from the fixed cylinder 541 is fixedly installed with an arc-shaped clamping plate 512 for clamping the anchor rod, and the side of the arc-shaped clamping plate 512 away from the anchor rod is rotatably connected to the connecting rod 513.

[0046] Furthermore, an anti-slip pad is provided on one side of the arc-shaped clamping plate 512 close to the anchor rod, thereby facilitating the arc-shaped clamping plate 512 to better clamp the anchor rod.

[0047] A return spring 542 is fixedly mounted on the inner wall of the fixed cylinder 541 , and a side of the return spring 542 away from the inner wall of the fixed cylinder 541 is fixedly connected to the sliding cylinder 543 .

[0048] Working principle: First, insert the anchor rod into the rock wall hole 2 corresponding to the top plate 1. When the anchor rod is inserted into the inner cavity of the fixed ring 51, the roller group 62 can roll through its contact with the roller group 62, which can not only effectively reduce the friction between the two and reduce the insertion resistance, but also provide a straightening and guiding function for the anchor rod, ensuring that the anchor rod is smoothly inserted along the central axis of the fixed ring 51.

[0049] As the anchor rod is inserted, the baffle 510 moves synchronously, and the movement of the baffle 510 drives the inner sleeve 583 in the secondary fixed-distance telescopic member 59 to slide in the inner cavity of the outer sleeve 581 until the limit block 585 in the inner sleeve 583 enters the limit groove 586 corresponding to the inner wall of the outer sleeve 581. When the baffle 510 moves, the connecting rod 513 drives the two arc-shaped clamping plates 512 to clamp and fix the anchor rod. By clamping and fixing it, it can not only prevent the anchor rod from falling downward, but also make the anchor rod and the telescopic member 59 slide smoothly. The tube 56 moves synchronously, and the anchor rod continues to be inserted after being clamped and fixed. The movement of the anchor rod causes the telescopic tube 56 to be stretched through the limit ring 57. Similarly, the movement of the telescopic tube 56 causes the first-level fixed-distance telescopic member 58 to move to a certain distance, thereby facilitating the reasonable insertion of the anchor rod into a fixed depth according to the depth of the rock wall hole 2. The precise guidance of the telescopic tube 56 can prevent the anchor rod from deviating from the designed position, thereby facilitating the anchor rod to be anchored at the expected angle and depth, thereby facilitating the support effect of the anchor rod on the top plate 1.

[0050] Finally, the anchor rod is connected to the pneumatic anchor drill rig body 3, and the anchor rod is driven by the pneumatic anchor drill rig body 3 to enter the designed depth in the rock wall hole 2. After it reaches the designed depth, the anchor rod will contact the trigger switch 511, which will facilitate timely cutting off the power supply of the pneumatic anchor drill rig body 3. When the anchor rod reaches the designed depth in the rock wall hole 2, the anchor rod's grouting plug 41 and pad 42 will also engage with the accommodating groove 45 and rectangular groove 46 in the fixed ring 51, which will facilitate further ensuring the anchoring effect of the anchor rod and preventing the anchor rod from reversing due to external factors.

[0051] 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.

[0052] 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. A guide device for roof anchor drilling, comprising a roof (1) and a pneumatic anchor drill body (3) located below the roof (1), wherein a rock wall hole (2) is formed in an inner cavity of the roof (1), and an anchor rod for entering the rock wall hole (2) is installed in the pneumatic anchor drill body (3), characterized in that: The inner cavity of the rock wall hole (2) is provided with a guide mechanism, and the guide mechanism includes a fixed ring (51) fixedly installed at the rock wall hole (2), and at least two arc-shaped limiting plates (52) that fit the inner wall of the rock wall hole (2) are symmetrically fixedly installed on one side of the fixed ring (51), and a telescopic tube (56) is rotatably connected on one side of the fixed ring (51) and located between the two arc-shaped limiting plates (52), and a first-level fixed-distance telescopic member (58) for extending the telescopic tube (56) at a fixed distance is provided on one side of the fixed ring (51), and the first-level fixed-distance telescopic member (58) is located between the telescopic tube (56) and the arc-shaped limiting plate (52), and a limiting component for fixing the anchor rod is provided on the top of the telescopic tube (56), so that the anchor rod can move synchronously with the telescopic tube (56).

2. The guide device for roof anchor drilling according to claim 1, characterized in that: The limiting assembly includes a limiting ring (57) fixedly connected to the top of the telescopic tube (56), a secondary distance telescopic member (59) is provided on the top of the limiting ring (57), a baffle (510) is provided on the top of the secondary distance telescopic member (59), at least two fixed sleeves (541) are fixedly installed on the inner wall of the limiting ring (57), the inner cavity of the fixed sleeve (541) is slidably connected to a sliding sleeve (543), an arc-shaped clamping plate (512) for clamping an anchor rod is fixedly installed on the side of the sliding sleeve (543) away from the fixed sleeve (541), a connecting rod (513) is rotatably connected to one side of the arc-shaped clamping plate (512), and the connecting rod (513) is rotatably connected to the bottom of the baffle (510) on the side away from the arc-shaped clamping plate (512).

3. The guide device for roof anchor drilling according to claim 2, characterized in that: The first-stage fixed-distance telescopic member (58) or the second-stage fixed-distance telescopic member (59) each comprises at least two outer sleeves (581), the top of the inner wall of the outer sleeve (581) is fixedly connected to a compression spring (582), an inner sleeve (583) fixedly connected to the compression spring (582) is slidably connected between the two inner side walls of the outer sleeve (581), both sides of the inner sleeve (583) are fixedly connected to energy storage springs (587), both sides of the inner sleeve (583) are slidably connected to limit blocks (585) fixedly connected to the energy storage springs (587), and the inner wall of the outer sleeve (581) is provided with a limit groove (586) that matches the limit block (585).

4. The guide device for roof anchor drilling according to claim 3, characterized in that: The outer sleeve (581) in the first-stage fixed-distance telescopic member (58) is fixedly connected to the bottom of the telescopic tube (56), and the inner sleeve (583) is fixedly connected to the top of the telescopic tube (56); the outer sleeve (581) in the second-stage fixed-distance telescopic member (59) is fixedly connected to the top of the limiting ring (57), and the inner sleeve (583) is fixedly connected to the bottom of the baffle (510).

5. The guide device for roof anchor drilling according to claim 4, characterized in that: The spring compression amount of the extrusion spring (582) in the first-stage fixed-distance telescopic member (58) is greater than the spring compression amount of the extrusion spring (582) in the second-stage fixed-distance telescopic member (59).

6. The guide device for roof anchor drilling according to claim 1, characterized in that: An anchor rod assist assembly is provided on the side of the fixed circular ring (51) close to the rock wall hole (2), and the anchor rod assist assembly includes at least two connecting plates (61) slidably connected to both sides of the inner wall of the fixed circular ring (51), and a rotating wheel group (62) in contact with the outer peripheral wall of the anchor rod is rollingly connected to the side of the connecting plate (61) away from the inner wall of the fixed circular ring (51).

7. The guide device for roof anchor drilling according to claim 6, characterized in that: A support spring fixedly connected to the connecting plate (61) is fixedly installed in the inner cavity of the fixed ring (51).

8. The guide device for roof anchor drilling according to claim 1, characterized in that: The anchor rod comprises a rod body (4) arranged in a drill rod clamp of a pneumatic anchor drilling rig body (3); an anchor head (43) is fixedly connected to the anchor end of the rod body (4); a nut (44) is threadedly connected to the free end of the rod body (4); a pad (42) is arranged at the free end of the rod body (4) and located between the nut (44) and a fixed ring (51); and a slurry stopper (41) is threadedly connected to the free end of the rod body (4) and located on a side of the pad (42) away from the nut (44).

9. The guide device for roof anchor drilling according to claim 8, characterized in that: A receiving groove (45) matched with the slurry stopper (41) and a rectangular groove (46) matched with the pad (42) are provided on a side of the fixing ring (51) away from the rock wall hole (2).

10. The guide device for roof anchor drilling according to claim 1, characterized in that: A trigger switch (511) electrically connected to the pneumatic anchor drill body (3) is fixedly mounted on one side of the arc-shaped limiting plate (52).

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