Pneumatic drill jumbo and pneumatic rock drilling method

Abstract

The invention relates to the field of tunnel construction, in particular to a pneumatic drill jumbo and a pneumatic rock drilling method. 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 operation flexibility is high, fine construction operation of the tunnel face in the tunnel can be achieved, the operation efficiency is improved, and the construction cost and the operation difficulty are reduced.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction, and in particular to a pneumatic rock drilling trolley and a pneumatic rock drilling method. Background Art

[0002] When tunneling in rocky rock formations, the most widely used excavation method is drilling and blasting. The traditional construction method is to use manual pneumatic drills to drill holes and charge explosives for blasting. Its characteristics are low construction costs, but also low efficiency. In order to ensure the excavation speed, multiple people are required to hold pneumatic drills to drill holes, and the personal safety of personnel working on the face cannot be guaranteed.

[0003] With the improvement of mechanization level in tunnel construction, tunnel construction drilling has gradually changed from manual pneumatic drills to hydraulic rock drilling rigs. The current hydraulic rock drilling rigs have the following shortcomings:

[0004] 1. Most hydraulic drilling rigs have two or three arms. To ensure the excavation progress, at least two hydraulic drilling rigs are required to drill holes at the same time. The cost of hydraulic drilling rigs is relatively high, resulting in high economic costs for construction units.

[0005] 2. When drilling holes in rocks, the operation of the hydraulic drilling rig is complicated and has high requirements for the operator. Summary of the invention

[0006] The purpose of the present invention is to address the problems existing in the background technology and to propose a pneumatic rock drilling trolley and a pneumatic rock drilling method, which have high operating flexibility, can realize fine construction operations on the tunnel face, improve operating efficiency, and reduce construction costs and operating difficulty.

[0007] On the one hand, the present invention proposes a pneumatic rock drilling trolley, comprising an engineering chassis, a boom mechanism and a pneumatic rock drilling device; the boom mechanism is arranged in multiple groups on the engineering chassis; the pneumatic rock drilling device and the boom mechanism correspond to each other one by one and are arranged at the outer end of the boom mechanism, and the pneumatic rock drilling device comprises a central support seat, two side support seats distributed on both sides of the central support seat, an angle adjustment cylinder for adjusting the angle of the central support seat, a side telescopic arm rotatably arranged on the side of the central support seat and connected to the side support seat, an angle pushing cylinder whose two ends are respectively rotatably connected to the central support seat and the side telescopic arm to adjust the angle of the side support seat, and multiple groups of pneumatic rock drilling mechanisms respectively arranged on the central support seat and the two side support seats.

[0008] Preferably, the boom mechanism includes a tail slewing structure rotatably arranged on the engineering chassis, a hydraulic motor arranged on the engineering chassis and driving the tail slewing structure to rotate, a first lower link and a boom rotatably connected to the tail slewing structure at two locations, a second lower link rotatably connected to the first lower link and the boom at both ends, a lower oil cylinder rotatably connected to the boom and the first lower link at both ends, a connecting frame rotatably connected to the top of the boom, a first upper link and a second upper link rotatably connected to the boom and the connecting frame, an upper oil cylinder rotatably connected to the boom and the second upper link at both ends, a telescopic arm arranged on the connecting frame, an adjusting arm rotatably connected to the outer end of the telescopic arm, an adjusting oil cylinder rotatably connected to the telescopic arm and the adjusting arm at both ends, a first rotating member rotatably arranged at the outer end of the adjusting arm, a second rotating member rotatably arranged on the first rotating member, and a first rotating device and a second rotating device that respectively drive the first rotating device and the second rotating device to rotate.

[0009] Preferably, the lengths of the arms of the multiple groups of movable arm mechanisms are equal or different.

[0010] Preferably, the telescopic arm includes a first arm tube, a first sliding arm slidably set on the first arm tube, and a first telescopic cylinder built into the first arm tube and driving the first sliding arm to move; the side telescopic arm includes a second arm tube, a second sliding arm slidably set on the second arm tube, and a second telescopic cylinder built into the second arm tube and driving the second sliding arm to move.

[0011] Preferably, the middle support seat is rotatably arranged on the second rotating member, a bracket is arranged on the second rotating member, and both ends of the angle adjustment cylinder are rotatably connected to the bracket and the middle support seat respectively.

[0012] Preferably, the pneumatic rock drilling mechanism includes a slide rail, a linear driving cylinder for driving the slide rail to move in a straight line, a pneumatic rock drilling gun rollingly arranged on the slide rail, and an automatic retractable rope winder arranged on the slide rail and adjusting the position of the pneumatic rock drilling gun; multiple slide rails are respectively slidably arranged on the middle support seat and the side support seat, and multiple linear driving cylinders are respectively arranged on the middle support seat and the side support seat.

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

[0014] Preferably, the pneumatic rock drilling mechanism has three groups of pneumatic rock drilling guns; an air pump and an automatic tube collector are provided on the engineering chassis, the output end of the air pump is connected with the input end of the automatic tube collector, the output end of the automatic tube collector is connected with a main air pipe arranged along the boom and the telescopic arm, the main air pipe is connected with a four-way air circuit valve, the four-way air circuit valve is arranged on the adjusting arm, and the three air outlet ends of the four-way air circuit valve are respectively connected with branch air pipes, and the three branch air pipes are respectively connected with the corresponding air inlet ends of the three groups of pneumatic rock drilling guns.

[0015] On the other hand, the present invention provides a pneumatic rock drilling method, which is implemented by the above-mentioned pneumatic rock drilling rig, and the method comprises the following steps:

[0016] S1. Move the engineering chassis to the tunnel face where drilling is required;

[0017] S2, respectively adjusting multiple groups of boom mechanisms and multiple groups of pneumatic rock drilling devices, including the following steps S21-S27:

[0018] S21, adjusting the position of the tail rotating structure by a hydraulic motor;

[0019] S22, lift the boom through the lower cylinder;

[0020] S23, lifting the telescopic arm through the upper oil cylinder, and extending the telescopic arm;

[0021] S24, adjusting the position of the adjusting arm by adjusting the oil cylinder, and adjusting the positions of the first rotating member and the second rotating member at the same time;

[0022] S25, adjusting the positions of the middle support seat and the side support seat respectively through the angle adjustment cylinder and the angle pushing cylinder, and adjusting the telescopic degree of the side telescopic arm;

[0023] S26, pushing the slide rail to slide by pushing the oil cylinder linearly, so that the end of the slide rail abuts against the tunnel face;

[0024] S27. The pneumatic rock drill is controlled to move forward by an automatic retracting rope reel, and holes are drilled at the face using multiple pneumatic rock drills.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] The present invention integrates multiple sets of boom mechanisms on an engineering chassis, preferably two sets of boom mechanisms on an engineering chassis so that the space occupied by the entire machine is small. The boom mechanism and the pneumatic rock drilling mechanism can be adjusted in multiple directions, with high operational flexibility, and can achieve fine construction operations on the tunnel face, improve operating efficiency, and reduce construction costs and operating difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the adjustment principle structure of the boom, telescopic arm, adjustment arm, first rotating member and second rotating member;

[0029] Figure 3 It is a schematic diagram of the principle structure of the position adjustment of the middle support seat and the side support seat;

[0030] Figure 4It is a structural schematic diagram of the side telescopic arm and the side support seat;

[0031] Figure 5 It is a schematic diagram of the distribution of the slide rail and the rock drill gun;

[0032] Figure 6 It is a partial structural schematic diagram of a slide rail, a rock drill and an automatic retractable rope reel;

[0033] Figure 7 The diagram is a schematic diagram of the gas path structure distribution for supplying gas to a group of pneumatic rock drilling devices.

[0034] 1. The support frame includes the support rails, ... DETAILED DESCRIPTION

[0035] Embodiment 1

[0036] like Figure 1-Figure 7 As shown, a pneumatic rock drilling trolley proposed in this embodiment includes an engineering chassis 1, a boom mechanism and a pneumatic rock drilling device. The boom mechanism is used to adjust the position of the pneumatic rock drilling device and move the pneumatic rock drilling device to the tunnel face for drilling construction. Multiple groups of boom mechanisms are arranged on the engineering chassis 1. The specific number is selected according to actual needs and an engineering chassis 1 of appropriate tonnage and type is selected. The engineering chassis 1 is selected from but not limited to a crawler chassis or a wheeled chassis. In addition, in this embodiment, two groups of boom mechanisms are arranged on the engineering chassis 1.

[0037] like Figure 2 and Figure 3As shown, each set of boom mechanisms includes a tail slewing structure 2 rotatably arranged on an engineering chassis 1, a hydraulic motor arranged 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 oil 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 rotatably connected to the boom 5 and the connecting frame 7. 8 and the second upper connecting rod 9, an upper oil cylinder 10 with two ends rotatably connected to the boom 5 and the second upper connecting rod 9 respectively, a telescopic arm 11 arranged on the connecting frame 7, an adjusting arm 12 rotatably connected to the outer end of the telescopic arm 11, an adjusting oil cylinder 13 with two ends rotatably connected to the telescopic arm 11 and the adjusting arm 12 respectively, a first rotating member 14 rotatably arranged at the outer end of the adjusting arm 12, a second rotating member 15 rotatably arranged on the first rotating member 14, and a first rotating device and a second rotating device that respectively drive the first rotating member 14 and the second rotating member 15 to rotate. The tail rotating structure 2 is driven to rotate by a hydraulic motor, so as to adjust the position of the boom mechanism and the pneumatic rock drilling device. The tilt angle of the boom 5 is adjusted by the extension and contraction of the lower oil cylinder 6. The pitch angle of the telescopic 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 member 14 and the second rotating member 15, the rotation center axes of the two parts are perpendicular, and the rotation is achieved by driving the first rotating device and the second rotating device respectively. The first rotating device and the second rotating device can use hydraulic motors or other devices that can achieve rotational drive.

[0038] like Figure 2 As shown, the telescopic arm 11 itself can be telescopically adjusted, including a first arm tube, a first sliding arm slidably arranged on the first arm tube, and a first telescopic oil cylinder built in the first arm tube and driving the first sliding arm to move. Among them, the first arm tube is connected to the connecting frame 7, the sliding arm is rotatably connected to the adjustment arm 12, and is rotatably connected to the adjustment oil cylinder 13 at another location.

[0039] 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, when the lengths of the two sets of boom mechanisms 5 are equal, the specifications of the two sets of boom mechanisms are the same, which is convenient for unified manufacturing. When the lengths of the two booms 5 are unequal, the two sets of pneumatic rock drilling devices on the two sets of boom mechanisms can be staggered up and down, which reduces the overall space occupied by the machine and can achieve simultaneous drilling construction at different steps.

[0040] like Figure 1 and Figure 3As shown, the pneumatic rock drilling device and the boom mechanism correspond to each other and are arranged at the outer end of the boom mechanism. The pneumatic rock drilling device includes a central support seat 16, two side support seats 20 distributed on both sides of the central support seat 16, an angle adjustment cylinder 17 for adjusting the angle of the central support seat 16, a side telescopic arm 18 rotatably arranged on the side of the central support seat 16 and connected to the side support seat 20, an angle pushing cylinder 19 whose two ends are rotatably connected to the central support seat 16 and the side telescopic arm 18 to adjust the angle of the side support seat 20, and multiple groups of pneumatic rock drilling mechanisms respectively arranged on the central support seat 16 and the two side support seats 20. The pitch angle of the central support seat 16 is adjusted by the extension and contraction of the angle adjustment cylinder 17, and the tilt angle of the side support seat 20 is adjusted by the extension and contraction of the angle pushing cylinder 19.

[0041] The side telescopic arm 18 includes a second arm tube, a second sliding arm slidably arranged on the second arm tube, and a second telescopic oil cylinder built into the second arm tube and driving the second sliding arm to move. The second arm tube is rotatably connected to the middle support seat 16 and the angle pushing oil cylinder 19 at two locations. The first sliding arm is connected to 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, thereby adjusting the drilling position of the three groups of pneumatic rock drilling mechanisms.

[0042] The middle support seat 16 is rotatably set on the second rotating member 15, and a bracket 151 is set on the second rotating member 15. The two ends of the angle adjustment cylinder 17 are rotatably connected to the bracket 151 and the middle support seat 16 respectively. The rotation of the second rotating member 15 can adjust the orientation of the middle support seat 16.

[0043] like Figure 3-Figure 6 As shown, 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 drilling gun 23 rollingly arranged on the slide rail 22, and an automatic retractable rope reel 24 arranged on the slide 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, and the roller can roll on the slide rail 22. The automatic retractable rope reel 24 is used to control the position of the pneumatic rock drilling gun 23 on the slide rail 22.

[0044] The pneumatic rock drill 23 has a gun head 231. A connecting plate is provided on the top of the slide rail 22. The connecting plate has a through hole for the gun head 231 to pass through. The connecting plate is used to support the gun head 231, and the gun head 231 is used to drill holes at the face.

[0045] like Figure 6As shown, the automatic retractable rope reel 24 includes a pulling assembly and a shifting mechanism, wherein the pulling assembly includes two rope reel wheels rotatably arranged in the inner cavity of the slide rail 22, a connecting rope wound on the two rope reel wheels, and a first motor arranged on the slide rail 22 and connected to a rope reel drive, the connecting rope is connected to the pneumatic rock drill 23, the first motor drives the rope reel wheels to rotate, the rope reel wheels drive the connecting ropes to move, and the connecting ropes drive the pneumatic rock drill 23 to move forward and backward. The shifting mechanism includes two sets of shifting assemblies distributed in opposite directions, the shifting assemblies include ropes, a moving frame, a roller rotatably arranged on the moving frame and in rolling contact with the slide rail 22, a rope reel wheel rotatably arranged on the moving frame, and a second motor arranged on the moving frame and driving the rope reel wheel to rotate, a bearing seat is installed on the top of the moving frame, and the gun head 231 is installed through the bearing seat. In the two sets of shifting assemblies, the two ropes are respectively wound on the two rope reel wheels, and the outer ends of the two ropes are respectively connected to the pneumatic rock drill 23 and the slide rail 22. When the position of the pneumatic rock drill 23 is adjusted by the pulling assembly, the position of the mobile frame on the slide rail 22 is adjusted by the two sets of shifting assemblies to ensure that the bearing seat provides stable rotation support for the gun head 231. The winding and unwinding states of the two ropes in the two sets of shifting assemblies are opposite, that is, when one rope is wound up, the other rope is unwound.

[0046] like Figure 5 As shown, in the present embodiment, each group of pneumatic rock drilling devices has three groups of pneumatic rock drilling mechanisms; the three groups of pneumatic rock drilling mechanisms are respectively installed on the middle support seat 16 and the two side support seats 20; in the three groups of pneumatic rock drilling mechanisms, three slide rails 22 are respectively slidably set on the middle support seat 16 and the side support seat 20, and three linear push cylinders 21 are respectively set on the middle support seat 16 and the side support seat 20, and the linear push cylinders 21 are used to adjust the position of the slide rails 22.

[0047] like Figure 7As shown, the air path structure of one set of boom mechanisms and pneumatic rock drilling devices is exemplarily shown, and the air path structure used for another set of boom mechanisms and pneumatic rock drilling devices is similar to this, and in this embodiment, the pneumatic rock drilling mechanism has three sets of pneumatic rock drilling guns 23. An air pump and an automatic tube retractor 25 are provided on the engineering chassis 1, and the output end of the air pump is connected to the input end of the automatic tube retractor 25. The models of the air pump and the automatic tube retractor 25 are selected from the products of the prior art according to the use requirements. The output end of the automatic tube retractor 25 is connected to the main air pipe 26 erected along the boom 5 and the telescopic arm 11, and the main air pipe 26 is connected to a four-way air path valve 27. A plurality of penetration seats are provided on the boom 5 and the telescopic arm 11, and the penetration seats have a penetration channel for the main air pipe 26 to pass through. The penetration seats are used to limit the position of the main air pipe 26, and the automatic tube retractor 25 can retract and unwind the main air pipe 26, and the main air pipe 26 can move in the penetration channel. The retracting and unreeling process of the main air pipe 26 is adaptively adjusted along with the rotation and telescopic action of the telescopic arm 11, ensuring that the main air pipe 26 can effectively supply air to the four-way air valve 27. The four-way air valve 27 is arranged on the adjusting arm 12, and the three air outlets of the four-way air valve 27 are respectively connected to the branch air pipes 28, and the three branch air pipes 28 are respectively connected to the corresponding air inlet ends of the three pneumatic rock drills 23, ensuring that the air intake of the three pneumatic rock drills 23 is uniform and can be adjusted individually.

[0048] This embodiment integrates two sets of boom mechanisms on an engineering chassis 1. The entire machine occupies a small space. The boom mechanism and the pneumatic rock drilling mechanism can be adjusted in multiple directions, with high operational flexibility. It can realize fine construction work on the tunnel face, improve work efficiency, and reduce construction costs and operational difficulty. Each set of boom mechanisms corresponds to three sets of pneumatic rock drilling mechanisms, and there are a total of six sets of pneumatic rock drilling mechanisms. Six pneumatic rock drilling guns 23 can be used for drilling operations, greatly improving work efficiency. The angle of the pneumatic rock drilling mechanism can be flexibly adjusted to meet the needs of drilling holes at different angles. The equipment is highly flexible and can meet various construction process requirements such as three steps, two steps, full sections, inverts, and low-space operations in the tunnel. It has drilling and hole cleaning functions and can be used to drill blasting holes, locking foot anchor holes, and radial anchor holes.

[0049] Embodiment 2

[0050] This embodiment provides a pneumatic rock drilling method, which is implemented by the pneumatic rock drilling trolley in the first embodiment. The method includes the following steps:

[0051] S1. Move the engineering chassis 1 to the tunnel face where drilling is required, and then fix and support it on the ground to ensure the stability of the equipment during the entire drilling construction process;

[0052] S2, respectively adjusting multiple groups of boom mechanisms and multiple groups of pneumatic rock drilling devices, including the following steps S21-S27:

[0053] S21, a worker operates in the cab of the engineering chassis 1, controls each power structure to perform corresponding actions, and adjusts the position of the tail rotary structure 2 through the hydraulic motor;

[0054] S22, lifting the boom 5 through the lower cylinder 6;

[0055] S23, lifting the telescopic arm 11 through the upper oil cylinder 10, and extending the telescopic arm 11, so as to adjust the height of the pneumatic rock drilling device;

[0056] S24, adjusting the position of the adjusting arm 12 by adjusting the oil cylinder 13, and adjusting the positions of the first rotating member 14 and the second rotating member 15 at the same time, so as to adjust the pneumatic rock drilling device to the target position;

[0057] S25, adjusting the positions of the middle support seat 16 and the side support seat 20 respectively through the angle adjustment cylinder 17 and the angle push cylinder 19, and adjusting the telescopic degree of the side telescopic arm 18;

[0058] S26, pushing the slide rail 22 to slide by the linearly pushing oil cylinder 21, so that the end of the slide rail 22 abuts against the tunnel face to locate the drilling position;

[0059] S27. The pneumatic rock drill 23 is controlled to move forward by automatically retracting the rope reel 24, and a total of six pneumatic rock drills 23 are used to drill holes at the face. The six pneumatic rock drills 23 perform drilling operations simultaneously, and the drilling efficiency is high.

[0060] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pneumatic rock drilling rig, characterized in that: include: Engineering chassis (1); A plurality of movable arm mechanisms are arranged on the engineering chassis (1); A pneumatic rock drilling device corresponds to a boom mechanism one-to-one and is arranged at the outer end of the boom mechanism, comprising a central support seat (16), two side support seats (20) distributed on both sides of the central support seat (16), an angle adjustment cylinder (17) for adjusting the angle of the central support seat (16), a side telescopic arm (18) rotatably arranged on the side of the central support seat (16) and connected to the side support seat (20), an angle pushing cylinder (19) at both ends of which are respectively rotatably connected to the central support seat (16) and the side telescopic arm (18) to adjust the angle of the side support seat (20), and a plurality of pneumatic rock drilling mechanisms respectively arranged on the central support seat (16) and the two side support seats (20).

2. The pneumatic drilling rig according to claim 1, characterized in that: The boom mechanism comprises a tail slewing structure (2) rotatably arranged on an engineering chassis (1), a hydraulic motor arranged 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, respectively, a second lower connecting rod (4) rotatably connected to the first lower connecting rod (3) and the boom (5) at two ends, respectively, a lower oil cylinder (6) rotatably connected to the boom (5) and the first lower connecting rod (3) at two ends, respectively, a connecting frame (7) rotatably connected to the top of the boom (5), a first upper connecting rod (8) rotatably connected to the boom (5) and the connecting frame (7), and A second upper connecting rod (9), an upper oil cylinder (10) whose two ends are rotatably connected to the upper arm (5) and the second upper connecting rod (9), a telescopic arm (11) arranged on a connecting frame (7), an adjusting arm (12) rotatably connected to the outer end of the telescopic arm (11), an adjusting oil cylinder (13) whose two ends are rotatably connected to the telescopic arm (11) and the adjusting arm (12), a first rotating member (14) rotatably arranged at the outer end of the adjusting arm (12), a second rotating member (15) rotatably arranged on the first rotating member (14), and a first rotating device and a second rotating device respectively driving the first rotating member (14) and the second rotating member (15) to rotate.

3. The pneumatic rock drilling rig according to claim 2, characterized in that: The lengths of the big arms (5) of the multiple groups of movable arm mechanisms are equal or unequal.

4. The pneumatic rock drilling rig according to claim 2, characterized in that: The telescopic arm (11) comprises a first arm tube, a first sliding arm slidably arranged on the first arm tube, and a first telescopic oil cylinder built in the first arm tube and driving the first sliding arm to move; the side telescopic arm (18) comprises a second arm tube, a second sliding arm slidably arranged on the second arm tube, and a second telescopic oil cylinder built in the second arm tube and driving the second sliding arm to move.

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

6. The pneumatic rock drilling rig according to claim 5, characterized in that: The pneumatic rock drilling mechanism comprises a slide rail (22), a linear driving oil cylinder (21) for driving the slide rail (22) to move in a straight line, a pneumatic rock drilling gun (23) rollingly arranged on the slide rail (22), and an automatic retractable rope reel (24) arranged on the slide rail (22) and adjusting the position of the pneumatic rock drilling gun (23); a plurality of slide rails (22) are respectively slidably arranged on a middle support seat (16) and a side support seat (20), and a plurality of linear driving oil cylinders (21) are respectively arranged on the middle support seat (16) and the side support seat (20).

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

8. The pneumatic rock drilling rig according to claim 6, characterized in that: The pneumatic rock drilling mechanism comprises three groups of pneumatic rock drilling guns (23); an air pump and an automatic tube collector (25) are arranged on the engineering chassis (1); an output end of the air pump is connected to an input end of the automatic tube collector (25); the output end of the automatic tube collector (25) is connected to a main air pipe (26) erected along a large arm (5) and a telescopic arm (11); the main air pipe (26) is connected to a four-way air path valve (27); the four-way air path valve (27) is arranged on an adjusting arm (12); and three air outlet ends of the four-way air path valve (27) are respectively connected to air branch pipes (28); and the three air branch pipes (28) are respectively connected to air inlet ends of the three groups of pneumatic rock drilling guns (23).

9. A pneumatic rock drilling method, implemented by the pneumatic rock drilling trolley according to claim 6, characterized in that: The method comprises the following steps: S1, moving the engineering chassis (1) to the tunnel face where drilling is required; S2, respectively adjusting multiple groups of boom mechanisms and multiple groups of pneumatic rock drilling devices, including the following steps S21-S27: S21, adjusting the position of the tail rotating structure (2) by means of a hydraulic motor; S22, lifting the boom (5) by means of the lower oil cylinder (6); S23, lifting the telescopic arm (11) through the upper oil cylinder (10), and the telescopic arm (11) is extended; S24, adjusting the position of the adjusting arm (12) by adjusting the oil cylinder (13), and adjusting the positions of the first rotating member (14) and the second rotating member (15) at the same time; S25, adjusting the positions of the middle support seat (16) and the side support seat (20) respectively through the angle adjustment cylinder (17) and the angle pushing cylinder (19), and adjusting the telescopic degree of the side telescopic arm (18); S26, pushing the slide rail (22) to slide by linearly pushing the oil cylinder (21), so that the end of the slide rail (22) abuts against the tunnel face; S27, controlling the pneumatic rock drill (23) to move forward by automatically retracting the rope reel (24), and using a plurality of pneumatic rock drills (23) to drill holes at the face.

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