Pneumatic drill jumbo

Abstract

The utility model relates to the field of tunnel construction, in particular to a pneumatic drill jumbo. The device comprises an engineering chassis, a movable arm mechanism and a pneumatic rock drilling device, a plurality of groups of movable arm mechanisms are arranged on the engineering chassis; the pneumatic rock drilling devices and the movable arm mechanisms are installed in a one-to-one correspondence mode. The pneumatic rock drilling device comprises a middle supporting base, two side supporting bases distributed on the two sides of the middle supporting base, an angle adjusting oil cylinder used for adjusting the angle of the middle supporting base, and side telescopic arms rotationally arranged on the side face of the middle supporting base and connected with the side supporting bases. The two ends of the angle pushing oil cylinder are rotationally connected with the middle supporting base and the side telescopic arms correspondingly so as to adjust the angles of the side supporting bases; and the pneumatic rock drilling mechanisms are arranged on the middle supporting base and the two side supporting bases correspondingly. The utility model discloses operation flexibility is higher, can realize fine construction work of tunnel face in the tunnel, improves work efficiency, reduces construction cost and operation difficulty.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tunnel construction, in particular to a pneumatic rock drilling jumbo. BACKGROUND

[0002] When tunneling in stone stratum, the most widely used excavation method is drilling and blasting method. The traditional construction method is to drill holes by artificial air drill and to blast by loading explosives. The method has the characteristics of low construction cost, but low efficiency. In order to ensure the excavation footage speed, multiple persons need to hold the air drill to drill holes, and the personal safety of the personnel in the working face cannot be guaranteed.

[0003] With the improvement of mechanization level, the tunnel construction drilling gradually changes from artificial air drill to hydraulic rock drilling jumbo construction. The existing hydraulic rock drilling jumbo has the following shortcomings:

[0004] 1. The hydraulic rock drilling jumbo is mostly two-arm or three-arm, and at least two hydraulic rock drilling jumbos are needed to drill holes at the same time to ensure the excavation progress. The high cost of the hydraulic rock drilling jumbo leads to high economic cost of the construction unit.

[0005] 2. The hydraulic rock drilling jumbo is complicated to operate when drilling holes, and the operator is required to have high skills. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at the problems in the background art, and provides a pneumatic rock drilling jumbo, which has high flexibility, can realize fine construction operation in the working face of the tunnel, improve the operation efficiency, and reduce the construction cost and operation difficulty.

[0007] The utility model provides a pneumatic rock drilling jumbo, which comprises an engineering chassis, a movable arm mechanism and a pneumatic rock drilling device. The movable arm mechanism is provided in multiple groups on the engineering chassis. The pneumatic rock drilling device and the movable arm mechanism are one-to-one corresponding and are arranged at the outer end of the movable arm mechanism. The pneumatic rock drilling device comprises a middle support seat, two side support seats arranged on both sides of the middle support seat, an angle adjusting oil cylinder for adjusting the angle of the middle support seat, a side telescopic arm rotatably arranged on the side surface of the middle support seat and connected with the side support seat, an angle pushing oil cylinder rotatably connected with the middle support seat and the side telescopic arm at both ends to adjust the angle of the side support seat, and multiple groups of pneumatic rock drilling mechanisms arranged on the middle support seat and the two side support seats.

[0008] Preferably, the boom mechanism comprises a tail swing structure rotatably arranged on the engineering chassis, a hydraulic motor arranged on the engineering chassis and driving the tail swing structure to rotate, a first lower connecting rod and a big arm rotatably connected with the tail swing structure at two positions respectively, a second lower connecting rod having two ends rotatably connected with the first lower connecting rod and the big arm respectively, a lower oil cylinder having two ends rotatably connected with the big arm and the first lower connecting rod respectively, a connecting frame rotatably connected with the top end of the big arm, a first upper connecting rod and a second upper connecting rod rotatably connected with the big arm and the connecting frame respectively, an upper oil cylinder having two ends rotatably connected with the big arm and the second upper connecting rod respectively, a telescopic arm arranged on the connecting frame, an adjusting arm rotatably connected with the outer end of the telescopic arm, an adjusting oil cylinder having two ends rotatably connected with the telescopic arm and the adjusting arm respectively, a first rotating member rotatably arranged on the outer end of the adjusting arm, a second rotating member rotatably arranged on the first rotating member, and a first swing device and a second swing device driving the first rotating member and the second rotating member to rotate respectively.

[0009] Preferably, the lengths of the big arms of the plurality of boom mechanisms are equal or unequal.

[0010] Preferably, the telescopic arm comprises a first arm cylinder, a first sliding arm slidably arranged on the first arm cylinder, and a first telescopic oil cylinder arranged in the first arm cylinder and driving the first sliding arm to move; the side telescopic arm comprises a second arm cylinder, a second sliding arm slidably arranged on the second arm cylinder, and a second telescopic oil cylinder arranged in the second arm cylinder and driving the second sliding arm to move.

[0011] Preferably, the middle support seat is rotatably arranged on the second rotating member, the second rotating member is provided with a support, and the two ends of the angle adjusting oil cylinder are rotatably connected with the support and the middle support seat respectively.

[0012] Preferably, the pneumatic rock drilling mechanism comprises a slide rail, a linear push oil cylinder for driving the slide rail to move linearly, a pneumatic rock drilling gun rotatably arranged on the slide rail, and an automatic rope retractor arranged on the slide rail and adjusting the position of the pneumatic rock drilling gun; a plurality of slide rails are slidably arranged on the middle support seat and the side support seat respectively, and a plurality of linear push oil cylinders are arranged on the middle support seat and the side support seat respectively.

[0013] Preferably, the pneumatic rock drilling gun has a gun head, the top of the slide rail is provided with a connecting plate, and the connecting plate has a through hole for the gun head to pass through.

[0014] Preferably, the pneumatic rock drilling mechanism has three sets of pneumatic rock drilling guns; the engineering chassis is provided with an air pump and an automatic pipe collector, the output end of the air pump is in communication with the input end of the automatic pipe collector, the output end of the automatic pipe collector is communicated with a main air pipe erected along the big arm and the telescopic arm, the main air pipe is communicated with a four-way air path valve, the four-way air path valve is arranged on the adjusting arm, and the four-way air path valve has three gas outlets respectively communicated with branch air pipes, and the three branch air pipes are respectively communicated with the air inlets of the three sets of pneumatic rock drilling guns.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] The utility model discloses a plurality of movable arm mechanisms are integrated on an engineering chassis, preferably two movable arm mechanisms are integrated on an engineering chassis to make the whole machine's occupied space is small, movable arm mechanism and pneumatic rock drilling mechanism can multidirectional adjustment, and the operation flexibility is high, can realize the fine construction operation of the tunnel inside the working face, improves the operation efficiency, reduces the construction cost and the operation difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the structural schematic diagram of the utility model embodiment;

[0018] Figure 2 It is the adjusting principle structural schematic diagram of big arm, telescopic arm, adjusting arm, first rotating part and second rotating part;

[0019] Figure 3 It is the azimuth adjusting principle structural schematic diagram of middle support seat and side support seat;

[0020] Figure 4 It is the structural schematic diagram of side telescopic arm and side support seat;

[0021] Figure 5 It is the distribution schematic diagram of slide rail and rock drilling gun;

[0022] Figure 6 It is the local structural schematic diagram of slide rail, rock drilling gun and automatic contraction rope winding device;

[0023] Figure 7 It is the gas path structure distribution schematic diagram of a group of pneumatic rock drilling device gas transmission.

[0024] Reference Signs: 1, engineering chassis;2, tail part rotary structure;3, first lower connecting rod;4, second lower connecting rod;5, big arm;6, lower oil cylinder;7, connecting frame;8, first upper connecting rod;9, second upper connecting rod;10, upper oil cylinder;11, telescopic arm;12, adjusting arm;13, adjusting oil cylinder;14, first rotating part;15, second rotating part;151, support;16, middle support seat;17, angle adjusting oil cylinder;18, side telescopic arm;19, angle push oil cylinder;20, side support seat;21, straight line push oil cylinder;22, slide rail;23, pneumatic rock drilling gun;231, gun head;24, automatic contraction rope winding device;25, automatic pipe collector;26, main gas pipe;27, four-way gas path valve;28, gas distribution pipe. DETAILED DESCRIPTION

[0025] Embodiment one

[0026] As Figures 1-7As shown, the pneumatic drill rig proposed in the embodiment comprises an engineering chassis 1, a boom mechanism and a pneumatic drill device. The boom mechanism is used to adjust the position of the pneumatic drill device and move the pneumatic drill device to the tunnel face for drilling construction. The boom mechanism is provided in multiple groups on the engineering chassis 1. The specific number is selected according to actual needs and the engineering chassis 1 with appropriate tonnage and type is selected. The engineering chassis 1 is selected but not limited to a tracked chassis or a wheeled chassis. In addition, in the embodiment, the boom mechanism is provided in two groups on the engineering chassis 1.

[0027] As shown in Figure 2 and Figure 3 , each group of boom mechanism comprises a tail rotation structure 2 rotatably arranged on the engineering chassis 1, a hydraulic motor arranged on the engineering chassis 1 and driving the tail rotation structure 2 to rotate, a first lower connecting rod 3 and a large arm 5 rotatably connected with the tail rotation structure 2 at two places, a second lower connecting rod 4 having two ends rotatably connected with the first lower connecting rod 3 and the large arm 5, a lower oil cylinder 6 having two ends rotatably connected with the large arm 5 and the first lower connecting rod 3, a connecting frame 7 rotatably connected with the top end of the large arm 5, a first upper connecting rod 8 and a second upper connecting rod 9 rotatably connected with the large arm 5 and the connecting frame 7 respectively, an upper oil cylinder 10 having two ends rotatably connected with the large arm 5 and the second upper connecting rod 9, an extension arm 11 arranged on the connecting frame 7, an adjusting arm 12 rotatably connected with the outer end of the extension arm 11, an adjusting oil cylinder 13 having two ends rotatably connected with the extension arm 11 and the adjusting arm 12, a first rotating part 14 rotatably arranged on the outer end of the adjusting arm 12, a second rotating part 15 rotatably arranged on the first rotating part 14, and a first rotation device and a second rotation device driving the first rotating part 14 and the second rotating part 15 to rotate respectively. The tail rotation structure 2 is driven by the hydraulic motor to rotate, thereby realizing the adjustment of the orientation of the boom mechanism and the pneumatic drill device. The inclination angle of the large arm 5 is adjusted by the extension and retraction of the lower oil cylinder 6. The pitch angle of the extension arm 11 is adjusted by the upper oil cylinder 10. The pitch angle of the adjusting arm 12 is adjusted by the adjusting oil cylinder 13. For the rotation of the first rotating part 14 and the second rotating part 15, the rotation center axes of the two parts are perpendicular, and the rotation is realized by the driving of the first rotation device and the second rotation device respectively. The first rotation device and the second rotation device can adopt a hydraulic motor or other devices capable of realizing rotation driving.

[0028] As shown in Figure 2 , the extension arm 11 itself can be adjusted in extension and retraction, comprising a first arm cylinder, a first sliding arm slidably arranged on the first arm cylinder, and a first extension oil cylinder built in the first arm cylinder and driving the first sliding arm to move. Among them, the first arm cylinder is connected with the connecting frame 7, the sliding arm is rotatably connected with the adjusting arm 12, and is rotatably connected with the adjusting oil cylinder 13 at another place.

[0029] For multiple sets of boom mechanisms, the lengths of the multiple booms 5 are equal or unequal. When two sets of boom mechanisms are installed on the engineering chassis 1, if the lengths of the two sets of booms 5 are equal, the two sets of boom mechanisms are of the same specification, which is convenient for unified manufacturing. If the lengths of the two sets of booms 5 are unequal, the two sets of pneumatic rock drilling devices on the two sets of boom mechanisms can be distributed in an up-down staggered manner, which reduces the overall space occupied by the machine and enables simultaneous drilling at different steps.

[0030] As shown in Figure 1 and Figure 3 , the pneumatic rock drilling device and the boom mechanism are one-to-one corresponding and arranged at the outer end of the boom mechanism. The pneumatic rock drilling device comprises a middle support seat 16, two side support seats 20 distributed on both sides of the middle support seat 16, an angle adjusting oil cylinder 17 for adjusting the angle of the middle support seat 16, a side telescopic arm 18 rotatably arranged on the side of the middle support seat 16 and connected with the side support seat 20, an angle pushing oil cylinder 19 rotatably connected with the middle support seat 16 and the side telescopic arm 18 at both ends to adjust the angle of the side support seat 20, and multiple sets of pneumatic rock drilling mechanisms arranged on the middle support seat 16 and the two side support seats 20 respectively. The pitch angle of the middle support seat 16 is adjusted by the extension and retraction of the angle adjusting oil cylinder 17, and the inclination angle of the side support seat 20 is adjusted by the extension and retraction of the angle pushing oil cylinder 19.

[0031] The side telescopic arm 18 comprises a second arm cylinder, a second sliding arm slidably arranged on the second arm cylinder, and a second telescopic oil cylinder built in the second arm cylinder and driving the second sliding arm to move. The second arm cylinder is rotatably connected with the middle support seat 16 and the angle pushing oil cylinder 19 at two places respectively. The first sliding arm is connected with the side support seat 20. The distance between the side support seat 20 and the middle support seat 16 can be adjusted by the second telescopic oil cylinder, so as to adjust the drilling position of the three sets of pneumatic rock drilling mechanisms.

[0032] The middle support seat 16 is rotatably arranged on the second rotating member 15, the second rotating member 15 is provided with a bracket 151, the angle adjusting oil cylinder 17 is rotatably connected with the bracket 151 and the middle support seat 16 at both ends, and the orientation of the middle support seat 16 can be adjusted by the rotation of the second rotating member 15.

[0033] As shown in Figures 3-6 , the pneumatic rock drilling mechanism comprises a sliding rail 22, a linear pushing oil cylinder 21 for driving the sliding rail 22 to move linearly, a pneumatic rock drilling gun 23 rotatably arranged on the sliding rail 22, and an automatic retracting rope winder 24 arranged on the sliding rail 22 and adjusting the position of the pneumatic rock drilling gun 23. The pneumatic rock drilling gun 23 has a roller at the bottom, the roller can roll on the sliding rail 22, and the position of the pneumatic rock drilling gun 23 on the sliding rail 22 is controlled by the automatic retracting rope winder 24.

[0034] The pneumatic rock drill gun 23 has a gun head 231, the top of the slide rail 22 is provided with a connecting plate having a through hole for the gun head 231 to pass through, the gun head 231 is supported by the connecting plate, and the gun head 231 is used for drilling at the working face.

[0035] As shown in Figure 6 The automatic rope winding device 24 includes a pulling assembly and a displacement mechanism. The pulling assembly includes two winding wheels rotatably arranged in the inner cavity of the slide rail 22, a connecting rope wound on the two winding wheels, and a first motor arranged on the slide rail 22 and drivingly connected with one winding wheel. The connecting rope is connected with the pneumatic rock drill gun 23, the first motor drives the winding wheel to rotate, the winding wheel drives the connecting rope to move, and the connecting rope drives the pneumatic rock drill gun 23 to move forward and backward. The displacement mechanism includes two groups of displacement assemblies oppositely arranged. Each displacement assembly includes a rope, a moving frame, a roller rotatably arranged on the moving frame and in rolling contact with the slide rail 22, a winding wheel rotatably arranged on the moving frame, and a second motor arranged on the moving frame and driving the winding wheel to rotate. A bearing seat is mounted on the top of the moving frame, and the gun head 231 is mounted through the bearing seat. In the two groups of displacement assemblies, the two ropes are wound on the two winding wheels respectively, and the outer ends of the two ropes are connected with the pneumatic rock drill gun 23 and the slide rail 22 respectively. When the position of the pneumatic rock drill gun 23 is adjusted by the pulling assembly, the position of the moving frame on the slide rail 22 is adjusted by the two groups of displacement assemblies, so that the bearing seat can stably support the rotation of the gun head 231. The winding and unwinding states of the two ropes in the two groups of displacement assemblies are opposite, that is, when one rope is wound, the other rope is unwound.

[0036] As shown in Figure 5 In the embodiment, each pneumatic rock drilling device has three groups of pneumatic rock drilling mechanisms. The three groups of pneumatic rock drilling mechanisms are respectively arranged on the middle support seat 16 and the two side support seats 20. In the three groups of pneumatic rock drilling mechanisms, the three slide rails 22 are respectively arranged on the middle support seat 16 and the side support seats 20 in a sliding manner, and the three linear push oil cylinders 21 are respectively arranged on the middle support seat 16 and the side support seats 20. The position of the slide rail 22 is adjusted by the linear push oil cylinder 21.

[0037] As shown in Figure 7As shown, the example shows the performance of the air path structure of a set of boom mechanisms and pneumatic rock drilling devices, the air path structure applied to another set of boom mechanisms and pneumatic rock drilling devices is similar, and in this embodiment, the pneumatic rock drilling mechanism has three sets of pneumatic rock drilling guns 23. The engineering chassis 1 is provided with an air pump and an automatic pipe collector 25, the output end of the air pump is communicated with the input end of the automatic pipe collector 25, and the model of the air pump and the automatic pipe collector 25 is selected from existing products according to the use requirement. The output end of the automatic pipe collector 25 is communicated with the main air pipe 26 arranged along the large arm 5 and the telescopic arm 11, and the main air pipe 26 is communicated with the four-way air path valve 27. A plurality of penetrating seats are arranged on the large arm 5 and the telescopic arm 11, the penetrating seats have penetrating channels for the main air pipe 26 to penetrate, the penetrating seats are used to limit the position of the main air pipe 26, the automatic pipe collector 25 can wind and unwind the main air pipe 26, and the main air pipe 26 can move in the penetrating channel. The winding and unwinding process of the main air pipe 26 is adaptively adjusted according to the rotation and telescopic action of the telescopic arm 11, so that the main air pipe 26 can effectively supply air to the four-way air path valve 27. The four-way air path valve 27 is arranged on the adjusting arm 12, and the four-way air path valve 27 has three air outlets respectively communicated with the branch air pipes 28, and the three branch air pipes 28 are respectively communicated with the three pneumatic rock drilling guns 23 corresponding to the air inlet ends, so as to ensure that the air inlet of the three pneumatic rock drilling guns 23 is uniform and can be independently controlled.

[0038] In this embodiment, two sets of boom mechanisms are integrated on one engineering chassis 1, the occupied space of the whole machine is small, the boom mechanism and the pneumatic rock drilling mechanism can be adjusted in multiple directions, the operation flexibility is high, the fine construction work of the tunnel face can be realized, the work efficiency is improved, and the construction cost and the operation difficulty are reduced. Each set of boom mechanism corresponds to three sets of pneumatic rock drilling mechanism, and a total of six sets of pneumatic rock drilling mechanism can be used for drilling operation, which greatly improves the work efficiency. The angle of the pneumatic rock drilling mechanism can be flexibly adjusted to meet the needs of drilling at different angles. The device has high flexibility, can meet various construction process requirements such as three steps, two steps, full face, inverted arch and low space operation in the tunnel, has the functions of drilling and hole cleaning, and can be used for drilling blast holes, anchor rod holes and radial anchor rod holes.

[0039] Embodiment two

[0040] In this embodiment, a pneumatic rock drilling method is provided, which is implemented by the pneumatic rock drilling jumbo in embodiment one, and the method comprises the following steps:

[0041] S1, move the engineering chassis 1 to the tunnel face where the hole needs to be drilled, and then fix and support it on the ground to ensure the stability of the device during the whole drilling construction process;

[0042] S2, adjust a plurality of sets of boom mechanisms and a plurality of sets of pneumatic rock drilling devices respectively, which comprises the following steps S21-S27:

[0043] S21, the worker controls in the cab of the engineering chassis 1, controls each power structure to carry out corresponding action, through the hydraulic motor adjusts the orientation of the tail rotary structure 2;

[0044] S22, the large arm 5 is lifted through the lower oil cylinder 6;

[0045] S23, the telescopic arm 11 is lifted through the upper oil cylinder 10, the telescopic arm 11 is stretched, thereby realizing the height adjustment of the pneumatic rock drill device;

[0046] S24, the orientation of the adjusting arm 12 is adjusted through the adjusting oil cylinder 13, the orientation of the first rotating part 14 and the second rotating part 15 is adjusted, so as to adjust the pneumatic rock drill device to the target orientation;

[0047] S25, the orientation of the middle support base 16 and the side support base 20 is adjusted through the angle adjusting oil cylinder 17 and the angle pushing oil cylinder 19 respectively, the telescopic degree of the side telescopic arm 18 is adjusted;

[0048] S26, the slide rail 22 is pushed to slide through the straight line pushing oil cylinder 21, the end of the slide rail 22 is abutted at the working face, and the drilling position is positioned;

[0049] S27, the pneumatic rock drill gun 23 is controlled to move forward through the automatic contraction rope winding device 24, a total of six pneumatic rock drill guns 23 are used to drill at the working face, the six pneumatic rock drill guns 23 carry out drilling operation simultaneously, and the drilling efficiency is high.

[0050] The embodiment of the utility model is described in detail in combination with the drawings above, but the utility model is not limited to this, various changes can be made within the knowledge range of the technical personnel in the technical field, without departing from the purpose of the utility model.

Claims

1. A pneumatic rock drilling rig, characterized in that, include: Engineering chassis (1); Multiple boom mechanisms are mounted on the engineering chassis (1); The pneumatic rock drilling device corresponds one-to-one with the boom mechanism and is set at the outer end of the boom mechanism. It includes a central support base (16), two side support bases (20) distributed on both sides of the central support base (16), an angle adjustment cylinder (17) for adjusting the angle of the central support base (16), a side telescopic arm (18) rotatably set on the side of the central support base (16) and connected to the side support bases (20), an angle push cylinder (19) with both ends rotatably connected to the central support base (16) and the side telescopic arm (18) respectively to adjust the angle of the side support base (20), and multiple sets of pneumatic rock drilling mechanisms respectively set on the central support base (16) and the two side support bases (20).

2. The pneumatic rock drilling rig according to claim 1, characterized in that, The boom mechanism includes a tail slewing structure (2) rotatably mounted on the engineering chassis (1), a hydraulic motor mounted on the engineering chassis (1) and driving the tail slewing structure (2) to rotate, a first lower connecting rod (3) and a boom (5) rotatably connected to the tail slewing structure (2) at two locations, a second lower connecting rod (4) rotatably connected to the first lower connecting rod (3) and the boom (5) at both ends, a lower cylinder (6) rotatably connected to the boom (5) and the first lower connecting rod (3) at both ends, a connecting frame (7) rotatably connected to the top of the boom (5), and a first upper connecting rod (8) rotatably connected to the boom (5) and the connecting frame (7). The second upper connecting rod (9), the upper cylinder (10) which is rotatably connected to the upper arm (5) and the second upper connecting rod (9) at both ends respectively, the telescopic arm (11) which is set on the connecting frame (7), the adjusting arm (12) which is rotatably connected to the outer end of the telescopic arm (11), the adjusting cylinder (13) which is rotatably connected to the telescopic arm (11) and the adjusting arm (12) at both ends respectively, the first rotating member (14) which is rotatably set to the outer end of the adjusting arm (12), the second rotating member (15) which is rotatably set on the first rotating member (14), and the first rotary device and the second rotary device which drive the first rotating member (14) and the second rotating member (15) to rotate respectively.

3. The pneumatic rock drilling rig according to claim 2, characterized in that, The booms (5) of multiple boom mechanisms have equal or unequal lengths.

4. The pneumatic rock drilling rig according to claim 2, characterized in that, The telescopic boom (11) includes a first boom cylinder, a first sliding arm slidably disposed on the first boom cylinder, and a first telescopic cylinder built into the first boom cylinder and driving the first sliding arm to move; the side telescopic boom (18) includes a second boom cylinder, a second sliding arm slidably disposed on the second boom cylinder, and a second telescopic cylinder built into the second boom cylinder and driving the second sliding arm to move.

5. The pneumatic rock drilling rig according to claim 2, characterized in that, The middle support base (16) is rotatably mounted on the second rotating part (15), and the second rotating part (15) is provided with a bracket (151). The two ends of the angle adjustment cylinder (17) are rotatably connected to the bracket (151) and the middle support base (16) respectively.

6. The pneumatic rock drilling rig according to claim 5, characterized in that, The pneumatic rock drilling mechanism includes a slide rail (22), a linear push cylinder (21) for driving the slide rail (22) to move in a straight line, a pneumatic rock drill (23) that is rolled on the slide rail (22), and an automatic retractable rope reel (24) that is set on the slide rail (22) and adjusts the position of the pneumatic rock drill (23); multiple slide rails (22) are respectively slidably set on the central support (16) and the side support (20), and multiple linear push cylinders (21) are respectively set on the central support (16) and the side support (20).

7. The pneumatic rock drilling rig according to claim 6, characterized in that, The pneumatic rock drill (23) has a drill head (231) and a connecting plate on the top of the slide rail (22), the connecting plate having a through hole for the drill head (231) to pass through.

8. The pneumatic rock drilling rig according to claim 6, characterized in that, The pneumatic rock drilling mechanism has three sets of pneumatic rock drills (23); an air pump and an automatic pipe retractor (25) are installed on the engineering chassis (1). The output end of the air pump is connected to the input end of the automatic pipe retractor (25). The output end of the automatic pipe retractor (25) is connected to the main air pipe (26) installed along the boom (5) and telescopic boom (11). The main air pipe (26) is connected to a four-way air valve (27). The four-way air valve (27) is installed on the adjusting arm (12). The three air outlets of the four-way air valve (27) are respectively connected to the air distribution pipes (28). The three air distribution pipes (28) are respectively connected to the air inlet ends of the three sets of pneumatic rock drills (23).

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