Pneumatic independent impact and slewing landing leg type jumbolter

Abstract

The invention discloses a jumbolter with an independent impact function, which relates to the technical field of jumbolters and comprises a support leg, a pneumatic impactor, a pneumatic gear motor, a gear reducer, a motor exhaust reversing valve and an operating arm. The impact energy, the rotation torque and the propulsive force can be adjusted at any time along with the gradual geological change of the anchor rod hole; the pneumatic gear motor has a reverse rotation function, threads of the connecting rod can be loosened, and the drill rod clamping problem can be easily solved; the rotation power is smaller than the output power, and the operation reaction torque is small; and the weight of parts such as the secondary propulsion supporting legs is reduced and optimized, so that the weight of the machine is reduced. The technical effects that the weight of the machine is reduced, the service life is prolonged, operation is safe, and the drilling efficiency is improved are comprehensively achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anchor rod drilling machine, more particularly to a pneumatic independent impact and rotary leg type anchor rod drilling machine. BACKGROUND

[0002] The MQT series pneumatic anchor rod drilling machine is composed of a rotary power head and a glass fiber reinforced plastic three-stage leg providing thrust. It is widely used in coal mine roof anchor rod support due to its safety, flexibility and low price. The anchor rod hole generally needs to pass through the coal seam, soft rock layer and solid rock layer. The pneumatic anchor rod drilling machine needs large torque and thrust to drill in the cutting mode. After entering the rock layer, the drilling speed sharply decreases due to the relatively small torque and thrust.

[0003] The MYT series hydraulic anchor rod drilling machine has large torque and thrust, which can effectively solve the above problems. However, due to the heavy weight of the machine, it cannot be moved flexibly by manpower, and it has not been replaced by the pneumatic anchor rod drilling machine for many years.

[0004] In recent years, in order to improve the drilling speed in the rock layer, the output power of the MQT series pneumatic anchor rod drilling machine has been gradually increased from 2.7kw in the early stage to 4.2kw. However, it still lags far behind the torque and thrust indicators of the MYT series hydraulic anchor rod drilling machine, and has not solved the drilling problem in the rock layer. Moreover, the weight of the machine has increased from 54kg to 62kg, which increases the difficulty of operation by manpower. In order to ensure the safety of underground operators, the output power of the pneumatic anchor rod drilling machine is strictly limited by the national coal mine safety department, and more than 4.2kw is not allowed to go down the well.

[0005] In addition, the output end and pivot part of the pneumatic anchor rod drilling machine are easily damaged due to structural reasons, causing early scrap of the whole machine, and the service life is generally only a few months.

[0006] Therefore, how to provide an anchor rod drilling machine that is safe in operation with small reverse torque, light in weight and flexible in movement by manpower, and has high drilling speed in coal seam, soft rock layer and solid rock layer and long service life is a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0007] Therefore, the present application provides a pneumatic independent impact and rotary leg type anchor rod drilling machine.

[0008] To achieve the above purpose, the present application provides the following technical solution, which comprises: a leg, the upper end of which is provided with a connecting disc embedded with a shunt pad, the front of the connecting disc is provided with a pivot embedded with a pivot pressure sleeve and a reversing valve ventilation screw rod, and the pivot is provided with a pivot pressure sleeve and a reversing valve ventilation screw rod.

[0009] The pneumatic impactor comprises an impactor shell, a flange plate is arranged at the lower end of the impactor shell and connected with the connecting plate of the supporting leg, and a flange plate is also arranged at the upper end of the impactor shell and connected with the reducer bottom plate of the reducer;

[0010] The reducer comprises an output shaft, the front end of the output shaft is supported by a centripetal sliding bearing, the rear end of the output shaft is supported by a centripetal sliding bearing and a thrust sliding bearing, and a hexagonal through hole is arranged at the center of the output shaft for mounting a drill bit and transmitting rotary torque and impact energy.

[0011] The pneumatic gear motor is suspended at the rear side of the reducer bottom plate, and the bearing sleeve embedded in the motor shell is arranged at the output end of the motor.

[0012] The operating arm is hinged to the front of the connecting plate through the pivot, two or more operating valves arranged inside the operating arm are arranged on the axis together with the operating mechanism and the transmission mechanism.

[0013] Preferably, the supporting leg is a two-stage advancing supporting leg.

[0014] Preferably, the piston rod is made of seamless steel pipe, and the top pin and the inner pressure sleeve at the lower end are made of stainless steel.

[0015] Preferably, a clamping spring is arranged on the shunt pad at the upper end of the supporting leg, and an annular clamping groove is arranged in the inner hole of the piston head.

[0016] Preferably, the flange plate arranged at the lower end of the impactor shell is a double-ear flange; the impactor shell and the cylinder body of the pneumatic impactor are integrated, the piston is a double-cylinder piston, the inner hole of the valve cover is a stepped hole, and a soundproof cover base is arranged at the exhaust port of the impactor shell.

[0017] Preferably, the sliding bearing supports at both ends of the output shaft of the reducer, the upper end is supported by a high-hardness shaft sleeve embedded in the reducer box body, and the lower end is supported by a high-hardness shaft sleeve arranged on the impactor shell and the bottom end surface thereof; a plurality of axial small holes for lubrication and sealing are arranged on the output shaft.

[0018] Preferably, the motor shell of the pneumatic gear motor adopts the direction of the lower end surface for air inlet and exhaust, and a motor exhaust reversing valve is arranged at the air inlet and exhaust port of the pneumatic gear motor.

[0019] Preferably, the motor exhaust reversing valve and the air inlet and exhaust port of the pneumatic gear motor adopt plane butt joint.

[0020] Preferably, the shell of the motor exhaust reversing valve is composed of an outer shell and a bushing, a plurality of axial air holes are arranged on the circumference of the bushing, the hole diameter is smaller than the width of the two-sided air gap on the outer shell, and the air holes are arranged close to the inner side of the air gap.

[0021] Preferably, a muffler is arranged at the exhaust port of the motor exhaust reversing valve, and the muffler comprises:

[0022] The muffler and the nylon pipe arranged in the muffler;

[0023] The damping hole is arranged on the circumference of the nylon pipe;

[0024] The exhaust gap between the upper end surface of the nylon pipe and the top surface of the inner cavity of the muffler forms a two-stage muffling.

[0025] Preferably, a connecting block is arranged between the outer shell of the motor exhaust reversing valve and the impactor shell.

[0026] Preferably, a hollow transmission shaft with a shaft coupling at both ends is arranged on the axis of the operating arm, and a push rod is arranged in the hollow transmission shaft; the motor intake valve and the air leg pressure regulating valve above the operating arm are arranged in an upper and lower overlapping manner on the axis; the handle and the trigger below the operating arm are also arranged in an upper and lower overlapping manner on the axis, and the machine intake hole is arranged in front of the axis.

[0027] Compared with the prior art, the pneumatic independent impact and rotary support leg type anchor drill provided by the technical scheme has the following effects:

[0028] The axial thrust of the impact type hole drilling can be reduced, and the secondary propulsion of the support leg and the optimization of the parts can reduce the weight, so that the output power is increased by 85% while the weight of the machine is basically unchanged, the output power per unit weight of the machine is greatly improved, and the machine is light and flexible to move. The output power is increased, the output torque is not increased, and is even decreased by about 10%, and the reduction of the counter-torque ensures the operation safety. Under the premise of greatly increasing the output power, the impact, rotation and propulsion force can be adjusted at will according to the changes of the coal seam, soft rock and hard rock in the drilling process, so as to meet the performance requirements of the coal mine drilling anchor hole. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The drawing is a whole machine sectional view of the product of the embodiment of the present application.

[0031] Figure 2The drawing is a sectional view of the whole machine at A-A position.

[0032] Figure 3 The drawing is a sectional view of the pneumatic gear motor of the product of the embodiment of the present application.

[0033] Figure 4 The drawing is a sectional view of the manipulator arm of the product of the embodiment of the present application.

[0034] Figure 5 The drawing is a sectional view of the manipulator arm at B-B position. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0036] Please refer to the drawings Figures 1-5 The present application discloses a pneumatic independent impact and rotary support leg type anchor rod drilling machine.

[0037] The embodiment of the present application aims to provide a pneumatic anchor rod drilling machine which is safe in operation, has small reverse torque, is light in weight, can be moved flexibly by manpower, has high drilling speed in coal seams, soft rock layers and solid rock layers, and has long service life.

[0038] The embodiment of the present application adds a pneumatic impactor with an output power of 2.5 kw on the basis of the existing pneumatic anchor rod drilling machine, and the output power of the pneumatic motor is also 2.5 kw, so that the output power configuration is 1:1, and the ratio can be adjusted at will according to the coal seam, soft rock layer and solid rock layer in the drilling process.

[0039] Obviously, the above parameters can show that the embodiment has a large space for improvement compared with the rotary power of 4.2 kw defined by the national coal safety department. The machine weight also has a certain space compared with 62 kg.

[0040] The addition of the pneumatic impactor, the pneumatic motor exhaust reversing valve and other structures increases the weight of the machine, and how to reduce the weight of the machine is the main technical problem to be solved by the embodiment of the present application.

[0041] Please refer to the drawings Figures 1-5 The present application discloses a pneumatic independent impact and rotary support leg type anchor rod drilling machine.

[0042] As Figure 1As shown, the present application mainly includes: support leg 44, pneumatic impactor 33, gear reducer 4, pneumatic gear motor 6, motor exhaust reversing valve 14 and operating arm 45.

[0043] Gear reducer 4, pneumatic gear motor 6, motor exhaust reversing valve 14 are arranged offset from the machine axis, without occupying the length space of support leg 44.

[0044] The output shaft 2 of the reducer is supported at both ends by high-hardness sliding bearings, the rear end is supported by the shaft sleeve 29 provided on the impactor housing 32 and the bottom end surface 31 thereof, and the front end is supported by the shaft sleeve 25 embedded in the reducer box 26, supporting the radial force from the gear and the axial impact force from the drill bit 1, eliminating the easily damaged rolling bearings, water seals, oil seals, sandproof sleeves and other structures, and improving the service life. The drawings show that the hexagonal through hole 3 for installing the drill bit, the water needle 41 for injecting water into the drill bit, and the lubrication and sealing hole 27 at the output end do not increase the length of the output shaft 2, simplifying the structure, and the length of the output end is reduced by more than 80% compared with existing pneumatic anchor rod drills.

[0045] As shown in Figure 1 and 2 , the impactor housing 32 is integrated with the cylinder body, and the piston 34 of the impactor is provided as a double-cylinder piston, reducing the weight and height size. The lower end of the impactor housing 32 is provided with a double-ear flange 48 connected to the support leg connecting disc 42, and the upper end is provided with a flange plate 30 connected to the gear reducer bottom plate 28. The front of the flange plate is provided with a sliding shaft sleeve 29 supporting the output shaft 2, and the wall of the housing is provided with a lubrication and sealing hole 5 from the shunt pad 40. The rear side of the impactor housing 32 is provided with a threaded hole 20 connected to the connecting block 19.

[0046] The inner hole of the valve cover 37 of the impactor is provided as a stepped hole 38 for installing the air needle 39 and the water needle 41, reducing the length size of the impactor.

[0047] The impactor housing 32 is provided with a nylon material soundproof cover base 35 at the exhaust port, which facilitates the machining of the impactor housing 32 and reduces the weight.

[0048] The upper end of the support leg is provided with a connecting disc 42 connected to the double-ear flange 48 of the impactor housing 32, and the connecting disc 42 is embedded with a shunt pad 40. The shunt pad 40 simplifies the difficulty of setting the water and gas hole in the connecting disc 42, and reduces the volume and height size of the connecting disc 42. In particular, removing the two bolts 49 on the double-ear flange 48 and moving out the shunt pad 40 can disassemble the parts inside the support leg 44 and the impactor 33, simplifying the overall structure of the machine and reducing the weight of the machine.

[0049] As shown in Figure 1As shown, the outer cylinder 46 and inner cylinder 22 of the outrigger are made of aluminum alloy pipe, and the connecting pieces at both ends are glued and bonded by threads and cannot be disassembled. The piston rod 23 is made of seamless steel pipe, and the connecting pieces at both ends are welded together, thus simplifying the structure and weight.

[0050] The clamping spring 43 is arranged on the shunt pad plate 40 at the upper end of the outrigger to prevent the outrigger from being pulled out after contraction, and the structure is small and light.

[0051] The top 47 at the lower part of the outrigger and the inner pressure sleeve 24 of the piston rod are made of stainless steel to prevent rusting when immersed in water for a long time during work.

[0052] As shown in Figure 1 and 3 The pneumatic gear motor 6 is suspended on the gear reducer bottom plate 28, the motor bearing sleeve 51 is embedded in the upper part of the motor housing 50, and the size and diameter are opposite to those of the impactor housing 32, which reduces the center distance of the reducer 4 gear and the volume and weight of the reducer 4.

[0053] The air inlet 8 and air outlet 7 of the pneumatic gear motor 6 are arranged below the motor housing 50, which directly interfaces with the motor exhaust reversing valve 14 in a plane, without the need for pipeline, and the structure is compact and light in weight.

[0054] The motor exhaust reversing valve housing is composed of an aluminum outer housing 17 and a steel lining 9. The axial air hole 16 on the circumference of the steel lining 9 has a diameter smaller than the width of the air knife slot 15 on the aluminum housing 17, and is close to the inner side of the air knife slot, so that the stroke of the valve core 36 is very small, the exhaust channel 15 is very large, the structure is small and light in weight.

[0055] The motor exhaust reversing valve exhaust port is provided with a motor silencer, including a polyurethane silencer cover 13 and a nylon pipe 11 with a damping hole 12. The top end of the nylon pipe forms a two-stage silencer with the exhaust gap 10 inside the silencer cover, and the top vibration of the silencer cover is used to remove ice. The volume is small, and the exhaust direction can be changed.

[0056] The motor exhaust reversing valve 14 is provided with a connecting block 19, which suspends the pneumatic gear motor 6 and the motor exhaust reversing valve 14 on the reducer bottom plate 28, and is fixed on the impactor housing 32 by screws 18.

[0057] As shown in Figure 1 and 4As shown, the front end of the operating arm 45 is provided with a pivot 53, which is hinged to the front of the connecting disc 42, and the pivot 53 is embedded with a pivot inner pressure sleeve 61 and a reversing valve vent screw 52, forming a plurality of compressed air channels. These channels are connected to the air impactor inlet valve 54, the air gear motor inlet valve 62, the leg pressure regulating valve 63, and the motor exhaust reversing valve inlet valve 55, respectively, through the shunt pad 40 and the external rubber tube 60, and are communicated with the air impactor 33, the air gear motor 6, the leg 44, and the motor exhaust reversing valve 14, respectively.

[0058] The couplings at both ends of the hollow transmission shaft 57 in the operating arm 45 are hexagonal sleeve type couplings 65.

[0059] As shown in Figure 1 and 4 As shown in Figs. 4 and 5, the impactor inlet valve 54, the air gear motor inlet valve 62, the leg pressure regulating valve 63, the motor exhaust reversing valve inlet valve 55, the two hollow transmission shafts 57, the push rod I 64, the push rod II 56, the two operating handles 58, the plate machine 66, and the button 59 in the operating arm 45 are overlapped and arranged on two axes for compact structure and light weight. The machine air inlet hole 67 is arranged at the front side of the two axes, and compressed air is supplied to the above-mentioned four inlet valves through a relatively simple structure.

[0060] Working principle of the embodiment of the present application:

[0061] 1. Compressed air mixed with lubricating oil mist through the oiler enters the anchor rod drilling machine. The operating instructions issued by the two operating handles at the lower end of the operating arm, the plate machine, and the button are transmitted to the impactor inlet valve, the motor inlet valve, the leg pressure regulating valve, and the motor exhaust reversing valve inlet valve for controlling the push rod I and the push rod II in the two hollow transmission shafts, respectively, and the drilling can be adjusted randomly according to the changes in the rock stratum.

[0062] 2. When the air motor works, the hole channel delivers compressed air to open the water injection valve, and connects the air needle and the lubricating hole channel, lubricates the front and rear shaft sleeves of the output shaft, lubricates and seals the front end shaft sleeve and the hexagonal hole of the installed rod tail, prevents the falling rock debris from entering the internal body of the machine, and at the same time, the compressed air and water are injected into the hole bottom through the inner hole of the rod, to cool the drill bit, discharge slag, and suppress dust.

[0063] 3. The air gear motor can reverse rotation under the control of the motor exhaust reversing valve, and when the rod drilling is unloaded or the drill is stuck, the reverse rotation can be realized by pressing the button.

[0064] The various embodiments described in this specification are presented for the purpose of illustration and description. Each of the embodiments described in this specification is presented as one or more exemplary embodiments. The various embodiments described in this specification can be combined with each other in any manner. Each of the embodiments described in this specification can be combined with other embodiments disclosed in the specification in any manner. The same or similar elements in the various embodiments are denoted by the same or similar reference numerals.

[0065] The above description of disclosed embodiments is intended to be illustrative and not restrictive. Many modifications and variations to the described embodiments will be apparent to those skilled in the art from this disclosure. The scope of the invention should be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and patents are incorporated herein by reference in their entirety.

Claims

1. A lightweight boom legged pneumatic anchor rod drill, characterized in that, Comprise: The upper end of the outrigger (44) is provided with a connecting disc (42) embedded with a shunt pad (40), the front of the connecting disc (42) is provided with a pivot (53) embedded with a pivot sleeve (61) and a reversing valve vent screw (52) with compressed air channels; The pneumatic impactor (33) comprises an impactor shell (32), the lower end of the impactor shell (32) is provided with a flange plate (48) connected to the connecting disc (42) of the outrigger (44), and the upper end is also provided with a flange plate (30) connected to the reducer bottom plate (28) of the reducer (4); The reducer (4) comprises an output shaft (2), the front end of the output shaft (2) is supported by a centripetal sliding bearing (25), the rear end is supported by a centripetal sliding bearing (29) and a thrust sliding bearing (31); a hexagonal through hole (3) is arranged at the center for mounting a drill shank (1) and transmitting rotary torque and impact energy; The pneumatic gear motor (6) is suspended at the rear side of the reducer bottom plate (28), and the bearing sleeve (51) embedded in the motor shell (50) is arranged at the output end of the motor; The operating arm (45) is hinged to the front of the connecting disc (42) through the pivot (53), and two or more operating valves arranged inside the operating arm (45) are arranged on the axis together with the operating mechanism and transmission mechanism.

2. Lightweight boomer according to claim 1, characterized in that The outrigger (44) is a two-stage propulsion outrigger.

3. Lightweight boomer according to claim 1 or 2, characterized in that The piston rod (23) is made of seamless steel pipe, the top (47) at the lower end and the inner pressure sleeve (24) are made of stainless steel.

4. A lightweight boomer according to claim 1 or 2, characterized in that The shunt pad (40) at the upper end of the outrigger (44) is provided with a snap spring (43), and the inner hole of the piston head is provided with an annular clamping groove (21).

5. The lightweight boomer according to claim 1, characterized in that The flange plate arranged at the lower end of the impactor shell (32) is a double-ear flange (48); the impactor shell (32) and the cylinder of the pneumatic impactor (33) are integrated structure, the piston is a double-cylinder piston (34), the inner hole of the valve cover is arranged as a stepped hole (38); a nylon soundproof cover base (35) is arranged at the exhaust port of the impactor shell (32).

6. A lightweight boomer according to claim 1, characterized in that The sliding bearing at both ends of the output shaft (2) of the reducer (4) is supported, the upper end is supported by a high-hardness shaft sleeve (25) embedded in the reducer box (26), and the lower end is supported by a high-hardness shaft sleeve (29) and its bottom end surface (31) arranged on the impactor shell (32); a plurality of axial small holes (27) for lubrication and sealing are arranged on the output shaft (2).

7. A lightweight boomer according to claim 1, characterized in that The motor shell (50) of the pneumatic gear motor (6) uses the lower end surface direction for air inlet and exhaust, and the inlet and exhaust ports of the pneumatic gear motor (6) are provided with a motor exhaust reversing valve (14).

8. A lightweight boomer according to claim 7, characterized in that The motor exhaust reversing valve (14) and the air inlet (8) and exhaust port (7) of the pneumatic gear motor (6) adopt plane butt joint.

9. A lightweight boomer according to claim 8, characterized in that The shell of the motor exhaust reversing valve is composed of an outer shell (17) and a bushing (9), a plurality of axial vent holes (16) are arranged on the circumference of the bushing (9), the hole diameter is smaller than the width of the two-sided air gap (15) on the outer shell, and is arranged close to the inner side of the air gap.

10. A lightweight boomer according to claim 9, characterized in that The exhaust port of the motor exhaust reversing valve (14) is provided with a silencer, which comprises: The muffler (13) and the nylon tube (11) inside the muffler (13); The damping hole (12) is opened on the circumference of the nylon tube; The exhaust gap (10) between the upper end surface of the nylon tube (11) and the top surface of the inner cavity of the muffler (13) forms a two-stage muffling.

11. A lightweight boomer according to claim 1 or 9, characterized in that The connecting block (19) is arranged between the motor exhaust reversing valve outer shell (17) and the impactor shell (32).

12. A lightweight boomer according to claim 1, characterized in that The axes of the hollow transmission shaft (57) with shaft couplings at both ends, the push rod (64) arranged in the hollow transmission shaft (57), the motor air inlet valve (62) and the air leg pressure regulating valve (63) arranged above and below the axis, the handle (58) and the trigger (66) arranged above and below the axis, and the machine air inlet hole (67) arranged in front of the axis are overlapped on the axis.

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