CN214944350U

CN214944350U - Anchor rod drilling device

Info

Publication number: CN214944350U
Application number: CN202120763755.2U
Authority: CN
Inventors: 文豪; 徐兴祥
Original assignee: Sichuan Ruiyun Construction Engineering Co ltd
Current assignee: Sichuan Ruiyun Construction Engineering Co ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-11-30
Anticipated expiration: 2031-04-14

Abstract

The application relates to an anchor rod drilling device, it includes base and support frame, the support frame includes support column and backup pad, support column and base fixed connection, slide along the direction of perpendicular base in the backup pad and set up on the support column, rotate in the backup pad and be provided with the drilling rod and be used for driving drilling rod pivoted first motor, the cavity has been seted up to the inside of drilling rod, keep away from the one end of backup pad on the drilling rod and set up the dust absorption mouth with the cavity intercommunication, the vent with the cavity intercommunication is seted up to the lateral wall of drilling rod, the fixed air exhauster that is provided with in the backup pad, the air intake intercommunication of air exhauster has air hose. The application has the effect of being convenient for clear up the dust in the pore.

Description

Anchor rod drilling device

Technical Field

The application relates to the field of drilling equipment, in particular to an anchor rod drilling device.

Background

The anchor rod drilling device is used for driving a hollow anchor rod into a rock stratum in a drilling mode, and cement mortar is injected into the hollow part of the anchor rod, so that the aim of stabilizing the rock stratum is fulfilled; when installing the anchor rod, two methods of drilling first and then inserting the anchor rod or directly drilling the hole by using the anchor rod are generally adopted.

Patent document with publication number CN211058829U discloses a verticality control device for tunnel anchor rod drilling, which comprises a drilling workbench and an adjusting box, wherein the drilling workbench is provided with a through hole, a sleeve, a positioning anchor and an adjusting sleeve, the outer side of the adjusting sleeve is connected with the positioning sleeve in a matching manner, a screw rod is connected with the inner thread of the sleeve, a first bevel gear is fixedly connected onto the screw rod, a rotating shaft is arranged in the adjusting box, an adjusting handle and a second bevel gear are fixedly connected onto the rotating shaft, the first bevel gear is meshed with the second bevel gear, the adjusting box is fixedly provided with a motor, and the output shaft of the motor is connected with a drill rod through a coupling; the dust collecting groove communicated with the through hole is formed in the bottom wall of the drilling working platform, a fan used for absorbing dust in the dust collecting groove is arranged on the drilling working platform, and a dust collecting box is communicated with the fan.

When the drilling machine is used, the drilling working platform is arranged on a rock stratum through the positioning anchor, the motor is started to control the drill rod to rotate, the adjusting handle is rotated to enable the rotating shaft to rotate, the second bevel gear on the rotating shaft drives the first bevel gear to rotate, the screw rod rotates in the sleeve and moves towards the inner part of the sleeve, and meanwhile, the adjusting box moves towards the direction close to the drilling working platform to realize drilling; during the drilling process of the drill rod, a large amount of dust is generated in the dust collecting groove, and the dust in the dust collecting groove is collected into the dust collecting box through the fan.

The related technology has the following defects that after drilling is finished, dust generated by partial drilling can remain in the anchor hole, if cleaning is not carried out, the joint degree of cement mortar and rock stratum in the later period is seriously influenced, and the construction quality is reduced, but the dust is accumulated in the anchor hole, so that the cleaning is very inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the inconvenient problem of dust clearance in the anchor eye, this application provides an anchor rod drilling equipment.

The application provides a stock drilling equipment adopts following technical scheme:

the utility model provides an anchor rod drilling equipment, includes base and support frame, the support frame includes support column and backup pad, support column and base fixed connection, the direction along perpendicular base in the backup pad slides and sets up on the support column, rotate in the backup pad and be provided with the drilling rod and be used for driving drilling rod pivoted first motor, the cavity has been seted up to the inside of drilling rod, keep away from the one end of backup pad on the drilling rod and set up the dust absorption mouth with the cavity intercommunication, the vent with the cavity intercommunication is seted up to the lateral wall of drilling rod, the fixed air exhauster that is provided with in the backup pad, the air intake intercommunication of air exhauster has air hose.

Through adopting above-mentioned technical scheme, anchor eye drilling is accomplished the back, closes first motor, with vent intercommunication on air hose and the drilling rod, start the air exhauster, pass through the cavity that the dust absorption mouth got into the drilling rod with the downthehole dust of anchor through the air exhauster to in inhaling the air exhauster through the vent, realize the comprehensive clearance to the downthehole dust of anchor, meanwhile, the control backup pad slides to keeping away from the base direction, takes the anchor eye out with the drilling rod, whole in-process, the downthehole dust clearance of anchor gets up convenient and fast.

Optionally, a core rod is arranged in the cavity of the drill rod in a sliding manner along the axial direction of the drill rod, the core rod is hollow, a sealing block used for sealing the dust suction port is fixedly arranged on the core rod, a first air vent communicated with the interior of the core rod is formed in the side wall of the sealing block, a second air vent communicated with the interior of the core rod is formed in the side wall of the core rod, a long strip-shaped groove communicated with the cavity is formed in the side wall of the drill rod along the axial direction of the drill rod, a sliding block is arranged in the long strip-shaped groove of the drill rod in a sliding manner, and the sliding block is fixedly connected with the core rod.

Through adopting above-mentioned technical scheme, during drilling, make the sealed piece on the core bar plug up the dust absorption mouth through stirring the slider, reduce at the drilling process, the rock stratum prevents to a certain extent that the drilling rod from being at the drilling process to the wearing and tearing of dust absorption mouth pore wall, because of the too big dust absorption mouth of messenger of the moment of torsion that the drilling rod bore takes place to warp or cracked.

Optionally, the side wall of the dust suction port of the drill rod is obliquely arranged, the side wall of the sealing block is provided with a guide inclined surface, and the vent is arranged on the guide inclined surface of the sealing block.

Through adopting above-mentioned technical scheme, at the dust absorption in-process, need stir the slider and make sealed piece and dust absorption mouth break away from, and when drilling, will seal the piece and dock again with the dust absorption mouth of drilling rod, make sealed piece more convenient when the dust absorption mouth butt joint with the bull stick through leading the dust absorption mouth that the inclined plane set up with the slope.

Optionally, a limiting block is fixedly arranged on the side wall of the drill rod, a bolt is arranged on the limiting block in a sliding mode, a through hole is formed in the side wall of the limiting block, the bolt penetrates through the through hole and is connected with the limiting block in a sliding mode, and a pin hole for inserting the bolt is formed in the sliding block.

Through adopting above-mentioned technical scheme, at the drilling in-process, through the slip of bolt restriction slider, increase the stability of core bar in the drilling rod, prevent to a certain extent at the drilling in-process, sealed piece breaks away from with the dust absorption mouth of bull stick.

Optionally, the limiting block is provided with an elastic member for driving the bolt to move towards the direction close to the sliding block.

Through adopting above-mentioned technical scheme, the drilling rod can produce certain centrifugal force at the rotation in-process, and the bolt can receive centrifugal force and produce easily when too big and break away from, increases the stability of bolt through the elastic component, prevents to a certain extent that bolt and slider can break away from the stopper.

Optionally, an installation block is fixedly arranged at one end of the output shaft of the first motor, an installation assembly for installing a drill rod is arranged on the installation block, and the drill rod is detachably connected with the installation block through the installation assembly.

Through adopting above-mentioned technical scheme, the drilling rod uses the back for a long time, can appear damaging easily, and the drilling rod can be dismantled and set up on the installation piece, is convenient for change the drilling rod that damages.

Optionally, the installation component includes first clamping bar cover and second clamping bar cover, the mounting groove has been seted up along the direction of perpendicular base to the one end of keeping away from first motor on the installation piece, first spout and second spout have been seted up to the lateral wall of the mounting groove of installation piece, first clamping bar cover is worn to locate first spout and with installation piece sliding connection, second clamping bar cover is worn to locate the second spout and with installation piece sliding connection, first clamping bar cover and second clamping bar cover slide along the direction that is close to each other or keeps away from, be provided with on the installation piece and be used for preventing first clamping bar cover and the gliding locating part of second clamping bar cover.

Through adopting above-mentioned technical scheme, in actual work progress, according to the engineering needs, the aperture of anchor eye can have certain difference, is convenient for carry out the centre gripping to the drilling rod in different apertures through the cooperation of first holder sleeve, second holder sleeve and locating part to carry out the drilling construction, increase the practicality of device.

Optionally, a pipe sleeve is coaxially and rotatably arranged at one end, far away from the air inlet of the exhaust fan, of the ventilation hose, an external thread is formed on the side wall of the pipe sleeve, and an internal thread meshed with the external thread on the pipe sleeve is formed on the side wall of the ventilation opening of the drill rod.

Through adopting above-mentioned technical scheme, increase the stability of being connected between the blow vent of breather hose and drilling rod through the pipe box.

In summary, the present application includes at least one of the following beneficial technical effects:

1. after the anchor eye drilling was accomplished, close first motor, with vent intercommunication on air hose and the drilling rod, start the air exhauster, pass through the cavity that the dust absorption mouth got into the drilling rod with the downthehole dust of anchor through the air exhauster to in inhaling the air exhauster through the vent, realize the comprehensive clearance to the downthehole dust of anchor, meanwhile, the control backup pad slides to keeping away from the base direction, takes the anchor eye out with the drilling rod, whole in-process, convenient and fast is got up in the downthehole dust clearance of anchor. (ii) a

2. When drilling, the sealing block on the core rod plugs the dust suction port by pulling the sliding block, so that the abrasion of rock strata to the hole wall of the dust suction port in the drilling process is reduced, and the dust suction port is prevented from deforming or breaking to a certain extent due to overlarge torque borne by the drill rod in the drilling process;

3. in actual work progress, according to the engineering needs, the aperture of anchor eye can have certain difference, is convenient for carry out the centre gripping to the drilling rod in different apertures through the cooperation of first holder sleeve, second holder sleeve and locating part to carry out the drilling construction, increase the practicality of device.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic diagram of a portion of an embodiment of the present application;

FIG. 4 is a partial structural cross-sectional view of an embodiment of the present application;

fig. 5 is a partial structural schematic diagram of an embodiment of the present application.

Description of reference numerals: 1. a base; 11. fixing the bolt; 12. positioning holes; 13. a limiting rod sleeve; 2. a support frame; 21. a support pillar; 211. a guide groove; 212. a lead screw; 213. a second motor; 22. a support plate; 221. a guide block; 222. a first motor; 3. a drill stem; 31. a dust suction port; 32. a vent; 33. a core bar; 331. a sealing block; 3311. a guide slope; 3312. a first vent; 332. a slider; 3321. a pin hole; 333. a second vent; 34. a strip-shaped groove; 35. a limiting block; 351. a through hole; 352. a bolt; 3521. a pin handle; 353. a spring; 4. mounting blocks; 41. mounting the component; 411. a first clamping bar sleeve; 412. a second clamping rod sleeve; 42. mounting grooves; 43. a first chute; 44. a second chute; 45. tightly abutting against the bolt; 5. an exhaust fan; 51. an air hose; 511. pipe sleeve; 6. a dust collection box.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the application discloses stock drilling equipment. Referring to fig. 1, an anchor rod drilling device, including base 1 and support frame 2, four bolt holes have been seted up along perpendicular base 1 direction to the up end of base 1, and four bolt holes set up respectively in four angles of base 1, all wear to be equipped with fixing bolt 11 in base 1's the bolt hole, through fixing bolt 11 with the stable fixing of device on the stratum.

Referring to fig. 1, the support frame 2 includes two support columns 21 and two support plates 22, the two support columns 21 are welded on the base 1, the length direction of the support column 21 is perpendicular to the base 1, and the support plates 22 are slidably disposed on the support columns 21 along the length direction of the support column 21.

Referring to fig. 1 and 2, guide grooves 211 are formed in opposite side walls of the two support columns 21 along the length direction of the support columns 21, screw rods 212 are rotatably arranged in the guide grooves 211 of the two support columns 21, the length direction of the screw rods 212 is parallel to the length direction of the support columns 21, guide blocks 221 are welded on two sides of the support plate 22, threaded holes are formed in the guide blocks 221 along the axial direction of the support columns 21, the screw rods 212 penetrate through the threaded holes and are rotatably connected with the guide blocks 221, a second motor 213 is welded in the guide grooves 211 of the support columns 21, and output shafts of the second motor 213 are coaxially welded with the screw rods 212.

Referring to fig. 1, a drill rod 3 is rotated on a support plate 22, the length of the drill rod 3 is perpendicular to a base 1, a first motor 222 is welded on the bottom wall of the support plate 22, an output shaft of the first motor 222 is fixedly connected with the drill rod 3 in a coaxial mode, a positioning hole 12 is formed in the base 1, a limiting rod sleeve 13 is arranged on the base 1, the limiting rod sleeve 13 is fixed to the base 1 through a bolt, the limiting rod sleeve 13 is right opposite to the positioning hole 12 in the base 1, and the drill rod 3 is prevented from being deviated in a drilling process to a certain extent through the limiting rod sleeve 13.

Referring to fig. 1 and 3, an output shaft of the first motor 222 is welded with a mounting block 4, a mounting assembly 41 for mounting the drill rod 3 is arranged on the mounting block 4, and the drill rod 3 is detachably arranged on the mounting assembly 41; after the drill rod 3 is used for a long time, the drill rod 3 is easy to damage, and the drill rod 3 can be detachably arranged on the installation block 4, so that the damaged drill rod 3 can be conveniently replaced.

Referring to fig. 3, the mounting assembly 41 includes a first clamping rod sleeve 411 and a second clamping rod sleeve 412, both the first clamping rod sleeve 411 and the second clamping rod sleeve 412 are provided with arc blocks for clamping the drill rod 3, one end of the mounting block 4 close to the base 1 is provided with a mounting groove 42 along the axial direction of the drill rod 3, the side wall of the mounting groove 42 of the mounting block 4 is provided with a first sliding groove 43 and a second sliding groove 44 along the axial direction of the vertical drill rod 3, the first clamping rod sleeve 411 is arranged through the first sliding groove 43 and is slidably connected with the mounting block 4, the second clamping rod sleeve 412 is arranged through the second sliding groove 44 and is slidably connected with the mounting block 4, the sliding directions of the first clamping rod sleeve 411 and the second clamping rod sleeve 412 coincide, and the first clamping rod sleeve 411 and the second clamping rod sleeve 412 slide along the directions close to or far away from each other.

Referring to fig. 3, the mounting block 4 is provided with a limiting member for limiting the sliding of the first clamping bar sleeve 411 and the second clamping bar sleeve 412, the limiting member includes two abutting bolts 45, the two abutting bolts 45 are provided, the side wall of the mounting block 4 is provided with a first bolt hole communicated with the first sliding groove 43 and a second bolt hole communicated with the second sliding groove 44 along the sliding direction of the first clamping bar sleeve 411, the two fastening bolts are respectively inserted into the first bolt hole or the second bolt hole and rotatably connected with the mounting block 4, one of the abutting bolts 45 abuts against the first clamping bar sleeve 411, and the other abutting bolt 45 abuts against the second clamping bar sleeve 412.

In actual work progress, according to the engineering needs, the aperture of anchor eye can have certain difference, through first holder sleeve 411, second holder sleeve 412 and support tight bolt 45's cooperation, is convenient for carry out the centre gripping to the drilling rod 3 in different apertures to drilling construction increases the practicality of device.

Referring to fig. 1 and 4, a cavity is formed in the drill rod 3, a dust suction port 31 communicated with the cavity is formed in one end, far away from the support plate 22, of the drill rod 3, a ventilation opening 32 communicated with the cavity is formed in the side wall, close to one end of the support plate 22, of the drill rod 3, an exhaust fan 5 is welded to the bottom wall of the support plate 22, an air inlet of the exhaust fan 5 is communicated with a ventilation hose 51, and an air outlet of the exhaust fan 5 is communicated with a dust suction box 6.

After anchor eye drilling is accomplished, with vent hose 51 and the vent 32 intercommunication on the drilling rod 3, start air exhauster 5, through air exhauster 5 with the downthehole dust of anchor through dust absorption mouth 31 entering drilling rod 3's cavity to in inhaling air exhauster 5 through vent 32, in leading-in dust suction box 6 is with the dust by the suction box, realize the comprehensive clearance to the downthehole dust of anchor

Referring to fig. 5, a pipe sleeve 511 is sleeved on an end of the ventilation hose 51 far away from the exhaust fan 5, the pipe sleeve 511 is rotatably arranged on the ventilation hose 51, the side wall of the pipe sleeve 511 is provided with an external thread, and the side wall of the ventilation opening 32 of the drill rod 3 is provided with an internal thread meshed with the external thread on the pipe sleeve 511: during dust collection, the connection stability between the ventilation hose 51 and the ventilation opening of the drill rod 3 is increased through the pipe sleeve 511, and the ventilation hose 51 is prevented from being separated from the ventilation opening 32 of the drill rod 3 to a certain extent.

Referring to fig. 4, a core rod 33 is slidably disposed in a cavity of the rotary rod along an axial direction of the drill rod 3, the core rod 33 is hollow, a sealing block 331 is welded to one end of the core rod 33, which is close to the dust suction port 31 of the drill rod 3, a side wall of the dust suction port 31 of the drill rod 3 is inclined, a guide inclined surface 3311 having the same inclination angle as that of the side wall of the dust suction port 31 is formed on a side wall of the sealing block 331, a first vent 3312 communicating with the inside of the core rod 33 is formed on a side wall of the sealing block 331, and a second vent 333 communicating with the inside of the core rod 33 is formed on a side wall of the core rod 33.

Referring to fig. 4 and 5, the side wall of the drill rod 3 is provided with an elongated groove 34 along the axial direction of the drill rod 3, a sliding block 332 is slidably arranged in the elongated groove 34 of the drill rod 3, and the sliding block 332 is welded with the core rod 33; when drilling, the sealing block 331 on the core rod 33 plugs the dust suction port 31 by pulling the sliding block 332, so that the abrasion of rock strata to the hole wall of the dust suction port 31 in the drilling process is reduced, and the dust suction port 31 is prevented from being deformed or cracked to a certain extent due to overlarge torque borne by the drill rod 3 in the drilling process; during dust collection, the sliding block 332 is shifted to separate the sealing block 331 from the dust collection port 31 of the drill rod 3, and meanwhile, the first vent 3312 is communicated with the vent 32, so that dust collection treatment can be performed in the anchor hole.

Referring to fig. 5, a limit block 35 is welded on the side wall of the drill rod 3, the limit block 35 is arranged on one side of the elongated groove 34, a through hole 351 is formed in the side wall of the limit block 35 along a direction perpendicular to the length direction of the drill rod 3, a bolt 352 is slidably arranged in the through hole 351 of the limit block 35, a pin hole 3321 for inserting the bolt 352 is formed in the side wall of the slider 332, and the bolt 352 is inserted into the pin hole 3321 of the slider 332 during drilling; during drilling, the sliding of the sliding block 332 is limited by the plug 352, which increases the stability of the core rod 33 in the drill rod 3.

Referring to fig. 5, an elastic member for driving the plug 352 to move toward the direction close to the slider 332 is arranged on the limiting block 35, the elastic member is a spring 353, the spring 353 is sleeved on the plug 352, a pin handle 3521 is welded at one end of the plug 352, which is far away from the slider 332, one end of the spring 353 is welded with the pin handle 3521, and the other end of the spring 353 is welded with the limiting block 35; the drilling rod 3 can produce certain centrifugal force at the rotation in-process, and bolt 352 can receive centrifugal force and produce easily when too big and break away from, increases bolt 352's stability through the elastic component, prevents to a certain extent that bolt 352 and slider 332 can stopper 35 break away from.

The implementation principle of the anchor rod drilling device in the embodiment of the application is as follows: during drilling, the sliding block 332 is shifted to enable the core rod 33 to slide towards the direction close to the base 1, the sealing block 331 is enabled to block the dust suction port 31 of the drill rod 3, the plug pin 352 is inserted into the pin hole 3321 of the sliding block 332 to limit the movement of the core rod 33 in the cavity of the drill rod 3, the first motor 222 is started to drive the drill rod 3 to rotate, the second motor 213 is started to drive the mounting frame to move towards the direction close to the base 1, and drilling construction is achieved.

After drilling, the first motor 222 is closed, the vent hose 51 is communicated with the vent 32 of the drill rod 3 through the pipe sleeve 511, the exhaust fan 5 and the second motor 213 are started, the second motor 213 drives the support plate 22 to slide towards the direction away from the base 1, in the process, dust in the anchor hole enters the interior of the core rod 33 through the dust suction port 31 of the drill rod 3 and the second vent 333 on the sealing block 331 and enters the dust suction box 6 through the first vent 3312, the vent 32, the vent hose 51 and the exhaust fan 5 in sequence, and therefore the dust in the anchor hole is comprehensively cleaned.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an anchor rod drilling equipment, includes base (1) and support frame (2), support frame (2) are including support column (21) and backup pad (22), support column (21) and base (1) fixed connection, the direction slip setting along perpendicular base (1) on backup pad (22) is on support column (21), it is provided with drilling rod (3) and is used for driving drilling rod (3) pivoted first motor (222) to rotate on backup pad (22), its characterized in that: the cavity has been seted up to the inside of drilling rod (3), dust absorption mouth (31) with the cavity intercommunication are seted up to the one end of keeping away from backup pad (22) on drilling rod (3), vent (32) with the cavity intercommunication are seted up to the lateral wall of drilling rod (3), fixed air exhauster (5) that are provided with on backup pad (22), the air intake intercommunication of air exhauster (5) has breather hose (51).

2. A rock bolt drilling apparatus according to claim 1, wherein: the dust collector is characterized in that a core rod (33) is arranged in a cavity of the drill rod (3) in a sliding mode along the axial direction of the drill rod (3), the core rod (33) is hollow, a sealing block (331) used for sealing the dust suction port (31) is fixedly arranged on the core rod (33), a first vent hole (3312) communicated with the interior of the core rod (33) is formed in the side wall of the sealing block (331), a second vent hole (333) communicated with the interior of the core rod (33) is formed in the side wall of the core rod (33), a long groove (34) communicated with the cavity is formed in the side wall of the drill rod (3) along the axial direction of the drill rod (3), a sliding block (332) is arranged in the long groove (34) of the drill rod (3) in a sliding mode, and the sliding block (332) is fixedly connected with the core rod (33).

3. A rock bolt drilling apparatus according to claim 2, wherein: the lateral wall slope setting of the dust absorption mouth (31) of drilling rod (3), the lateral wall of sealed piece (331) is provided with leads inclined plane (3311), the vent setting is on leading inclined plane (3311) of sealed piece (331).

4. A rock bolt drilling apparatus according to claim 2, wherein: the drill rod structure is characterized in that a limiting block (35) is fixedly arranged on the side wall of the drill rod (3), a bolt (352) is arranged on the limiting block (35) in a sliding mode, a through hole (351) is formed in the side wall of the limiting block (35), the bolt (352) penetrates through the through hole (351) and is in sliding connection with the limiting block (35), and a pin hole (3321) for inserting the bolt (352) is formed in the sliding block (332).

5. A rock bolt drilling apparatus according to claim 4, wherein: the limiting block (35) is provided with an elastic piece for driving the bolt (352) to move towards the direction close to the sliding block (332).

6. A rock bolt drilling apparatus according to claim 1, wherein: one end of an output shaft of the first motor (222) is fixedly provided with an installation block (4), an installation component (41) used for installing the drill rod (3) is arranged on the installation block (4), and the drill rod (3) is detachably connected with the installation block (4) through the installation component (41).

7. A rock bolt drilling apparatus according to claim 6, wherein: installation component (41) include first pinch bar cover (411) and second pinch bar cover (412), mounting groove (42) have been seted up along the direction of perpendicular base (1) to the one end of keeping away from first motor (222) on installation piece (4), first spout (43) and second spout (44) have been seted up to the lateral wall of mounting groove (42) of installation piece (4), first pinch bar cover (411) wear to locate first spout (43) and with installation piece (4) sliding connection, second pinch bar cover (412) wear to locate second spout (44) and with installation piece (4) sliding connection, first pinch bar cover (411) and second pinch bar cover (412) slide along the direction that is close to each other or keeps away from, be provided with on installation piece (4) and be used for preventing first pinch bar cover (411) and the gliding locating part of second pinch bar cover (412).

8. A rock bolt drilling apparatus according to claim 1, wherein: a pipe sleeve (511) is coaxially and rotatably arranged at one end, far away from the air inlet of the exhaust fan (5), of the ventilation hose (51), an external thread is arranged on the side wall of the pipe sleeve (511), and an internal thread meshed with the external thread on the pipe sleeve (511) is arranged on the side wall of the ventilation opening (32) of the drill rod (3).