Hydraulic control system for impact rotary drilling with underbit

Abstract

The application provides a hydraulic control system for impact rotary drilling of a bedding machine, and belongs to the technical field of hydraulic control systems, and comprises a variable pump, a pilot oil source control valve group, a proportional multi-way valve, a shuttle valve I, a one-way pressure reducing valve, a shuttle valve II, a drilling machine pilot handle group, an impact rotary drilling machine, a bidirectional hydraulic lock and a drilling machine feeding oil cylinder. Through the hydraulic control system for impact rotary drilling of the bedding machine, the impact rotary drilling machine can be infinitely adjusted between double speeds, high-frequency impact or low-frequency impact operation can be flexibly used according to rock strata and geological conditions, the use range of the equipment is greatly improved, and the hydraulic control system can be used for high-hardness rock strata, weathered rock strata and hard and brittle geology. When low-frequency impact operation is performed, one-key linkage operation can be realized, that is, the drilling machine feeding, rotation and impact functions can be completed by operating the impact pilot handle.

Description

Technical Field

[0001] This invention belongs to the technical field of hydraulic control systems, and specifically discloses a hydraulic control system for impact rotary drilling of a bottom-mounted drilling machine. Background Technology

[0002] The fully mechanized longwall face is fundamental to ensuring safe and efficient coal mining. During the mining process, the floor may experience hollowing, and the side and roof rocks may be severely weathered and unstable. Using a tunnel boring machine (TBM) for precise drilling and anchor bolt installation can significantly improve support effectiveness while reducing the risks associated with manual operation. The TBM, also known as a roadway repair machine, is a comprehensive intelligent equipment specifically designed for underground mining operations. It integrates drilling, crushing, loading, and transportation functions, featuring a compact structure, high mobility, and a high degree of automation. Currently, TBMs commonly use rotary drilling rigs for drilling. Rotary drilling rigs are hydraulically driven, rotating and feeding simultaneously. They are generally suitable for rock formations with lower hardness but cannot adapt to harder rock formations, weathered rock formations, or hard and brittle geological conditions. Impact rotary drilling rigs can simultaneously feed, impact, and rotate, effectively overcoming the shortcomings of rotary drilling rigs. Therefore, using impact rotary drilling rigs instead of rotary drilling rigs can significantly improve drilling efficiency. Currently, impact rotary drilling rigs require multiple handles to control feed, impact, and rotation separately. For high-frequency drilling, the impact force is strong, and separate control is safer. However, the impact force of low-frequency drilling is weaker than that of high-frequency drilling, and the safety is relatively higher. Simplifying the operation and achieving one-button linkage can be considered. Summary of the Invention

[0003] This invention provides a hydraulic control system for impact rotary drilling of a bottom-mounted drilling machine, which realizes one-button linkage of feed, rotation and low-frequency drilling.

[0004] The aforementioned hydraulic control system for the impact rotary drilling rig includes a variable displacement pump, a pilot oil source control valve assembly, a proportional multi-way valve, shuttle valve I, a one-way pressure reducing valve, shuttle valve II, a drilling rig pilot handle assembly, an impact rotary drilling rig, a two-way hydraulic lock, and a drilling rig feed cylinder. The hydraulic oil output from the variable displacement pump is pumped to the P port of the pilot oil source control valve assembly and the P port of the proportional multi-way valve. The impact rotary drilling rig includes a drilling rig rotary motor and a drilling rig impact control valve. The proportional multi-way valve includes a three-way valve core, with valve core VI corresponding to ports A6, B6, a6, and b6, and valve core VII corresponding to port A6. Ports 7, B7, a7, and b7 are connected to valve core VIII, which corresponds to ports A8, B8, a8, and b8. Ports A6 and B6 of the proportional multi-way valve are connected to ports V1 and V2 of the bidirectional hydraulic lock, respectively. Ports C1 and C2 of the bidirectional hydraulic lock are connected to the piston chamber and piston rod chamber of the drilling rig feed cylinder, respectively. Ports A7 and B7 of the proportional multi-way valve are connected to ports A7 and B7 of the drilling rig rotary motor, respectively. Ports A8 and B8 of the proportional multi-way valve are both connected to port A8 of the drilling rig impact control valve. The Pv port of the pilot oil source control valve group is connected to the drilling rig pilot oil source control valve. The P port of the pilot handle assembly is connected; the drilling rig pilot handle assembly includes an impact pilot handle, a rotary pilot handle, and a feed pilot handle. The P port of the drilling rig pilot handle assembly is connected to the P ports of the impact pilot handle, the rotary pilot handle, and the feed pilot handle, respectively. The a8 port of the impact pilot handle is connected to the a8 port of the proportional multi-way valve, and the b8 port is connected to the b8 port of the proportional multi-way valve, the 1 port of shuttle valve II, and the inlet of the one-way pressure reducing valve, respectively. The a7 port of the rotary pilot handle is connected to the 2 port of shuttle valve II, and the b7 port is connected to the b8 port of the proportional multi-way valve. The 3rd port of shuttle valve II is connected to the a7th port of the proportional multi-way valve; the outlet of the one-way pressure reducing valve is connected to the 1st port of shuttle valve I; the a6th port of the feed pilot handle is connected to the 2nd port of shuttle valve I, and the b6th port is connected to the b6th port of the proportional multi-way valve; the 3rd port of shuttle valve I is connected to the a6th port of the proportional multi-way valve; the T-ports of the impact pilot handle, the rotary pilot handle, and the feed pilot handle are all connected to the T-ports of the drilling rig pilot handle assembly, and the T-ports of the drilling rig pilot handle assembly are connected to the oil tank; the R-port of the proportional multi-way valve and the T-port of the drilling rig impact control valve 2 are both connected to the oil tank.

[0005] In the aforementioned hydraulic control system for impact rotary drilling of the rig, the pilot oil source control valve group includes a manual directional valve, a pressure reducing valve I, a pressure regulating valve I, a flow regulating valve, and a pressure regulating valve II. The P port of the pilot oil source control valve group is connected to the P port of the manual directional valve and the inlet of the pressure reducing valve I, respectively. The A port of the manual directional valve is connected to the inlet of the flow regulating valve, and the outlet of the flow regulating valve is connected to the WA port of the pilot oil source control valve group, the inlet of the pressure regulating valve II, and the LS port of the pilot oil source control valve group, respectively. The outlet of pressure reducing valve I is connected to the inlet of pressure regulating valve I and the Pv port of the pilot oil source control valve group. The WR port of the pilot oil source control valve group, the outlet of pressure regulating valve I, the outlet of pressure regulating valve II, and the T port of the manual directional valve are all connected to the R port of the pilot oil source control valve group. Under normal conditions, the P port of the manual directional valve is blocked, and the A port is connected to the T port. After reversing, the P port is connected to the A port, and the T port is blocked. The WA port of the pilot oil source control valve group is connected to quick-connect connector III, and the WR port is connected to quick-connect connector IV.

[0006] The aforementioned hydraulic control system for impact rotary drilling rig also includes a water source, a shut-off valve, a water filter, a water pressure reducing valve, a water safety valve, an oil / water radiator, and a water flushing control valve. The water source is connected to the inlet of the shut-off valve, the outlet of the shut-off valve is connected to the inlet of the water filter, the outlet of the water filter is connected to the inlet of the water pressure reducing valve, the outlet of the water pressure reducing valve is connected to the inlet of the water safety valve and the inlet of the oil / water radiator, the outlet of the oil / water radiator is connected to the P1 port of the water flushing control valve, and the A1 port of the water flushing control valve is connected to the W port of the impact rotary drilling rig. Under normal conditions, the P1 and A1 ports of the water flushing control valve are disconnected, and after reversing, the P1 and A1 ports are connected. The A8 port of the proportional multi-way valve is connected to the WX1 port of the water flushing control valve.

[0007] In the aforementioned hydraulic control system for impact rotary drilling of the underfloor drilling machine, the water flushing control valve includes a valve body, valve plate, valve core, sealing seat, locking cover, and pressure spring. The valve body is equipped with a P1 port, an A1 port, and mounting holes. The mounting holes penetrate two opposite end faces of the valve body, which are sequentially designated as mounting section I, mounting section II, and mounting section III. The end face where mounting section I connects to mounting section II is a conical surface. The diameter of mounting section II is smaller than the diameters of mounting section I and mounting section III. Mounting section I is connected to port P1, and mounting section II is connected to port A1. The valve plate and locking cover are installed at both ends of the valve body. The valve plate is equipped with... It has a WX1 port, which is connected to mounting section III; the valve core and the sealing seat are slidably installed in the mounting hole; the valve core includes valve core section I, valve core section II and valve core section III with successively increasing diameters, the diameter of valve core section II matches the diameter of mounting section II, and the diameter of valve core section III matches the diameter of mounting section III; the sealing seat includes sealing section I and sealing section II connected in sequence, sealing section I is slidably inserted into the lock cover, sealing section II is provided with a tapered end that matches the tapered surface, and sealing section II is inserted into valve core section I; the pressure spring is sleeved on sealing section I, and its two ends are connected to the lock cover and sealing section II respectively.

[0008] The aforementioned hydraulic control system for rotary drilling impact rig also includes a return oil filter and a bypass check valve. The R port of the proportional multi-way valve and the T port of the drilling rig impact control valve merge and then split into two paths. The first path is connected to the oil inlet of the oil / water radiator, and the second path is connected to the inlet of the bypass check valve. The oil outlet of the oil / water radiator and the outlet of the bypass check valve are both connected to the return oil filter, and the outlet of the return oil filter is connected to the oil tank.

[0009] The aforementioned hydraulic control system for impact rotary drilling of the drilling rig also includes quick-connect coupling I and quick-connect coupling II; the A8 port of the proportional multi-way valve is connected to quick-connect coupling I and the WX1 port of the water flushing control valve respectively, and the B8 port is connected to quick-connect coupling II; quick-connect coupling I and quick-connect coupling II are both connected to the A8 port of the drilling rig impact control valve.

[0010] The aforementioned hydraulic control system for impact rotary drilling rigs also includes an air source, ball valve, air filter, compressed air pressure regulating valve, oil-controlled air valve, lubrication drive device, lubrication speed regulating valve, and shuttle valve III. The air source is connected to the inlet of the ball valve, the outlet of the ball valve is connected to the inlet of the air filter, the outlet of the air filter is connected to the inlet of the compressed air pressure regulating valve, the outlet of the compressed air pressure regulating valve is connected to port A of the oil-controlled air valve, and port B of the oil-controlled air valve is connected to port Ps of the impact rotary drilling rig. Under normal conditions, ports A and B of the oil-controlled air valve are disconnected; after reversing, ports A and B... Port B is connected; Port A7 of the proportional multi-way valve is connected to Port A7 of the drilling rig rotary motor and Port 1 of shuttle valve III, respectively; Port B7 is connected to Port B7 of the drilling rig rotary motor and Port 2 of shuttle valve III, respectively; Port 3 of shuttle valve III is connected to the inlet of the lubrication speed control valve and Port Z of the oil control air valve, respectively; The outlet of the lubrication speed control valve is connected to the lubrication pump drive motor in the lubrication drive device, the lubrication pump in the lubrication drive device is driven to rotate by the lubrication pump drive motor, the inlet of the lubrication pump is connected to the lubrication oil tank, and the outlet of the lubrication pump is connected between the oil control air valve and the impact rotary drilling rig.

[0011] The aforementioned hydraulic control system for impact rotary drilling of the underfloor drilling machine also includes a feed regulating valve group; the A6 port of the proportional multi-way valve is connected to the V port of the feed regulating valve group, and the Z port of the feed regulating valve group is connected to the V1 port of the two-way hydraulic lock; the feed regulating valve group includes a pilot control valve, a pressure reducing valve II, and a check valve; the V port of the feed regulating valve group is connected to the inlet of the pressure reducing valve II and the outlet of the check valve, respectively; the outlet of the pressure reducing valve II is connected to the P port of the pilot control valve; the A port of the pilot control valve and the inlet of the check valve are both connected to the Z port of the feed regulating valve group; the control port of the pilot control valve is connected to the X port of the feed regulating valve group; and the L port of the feed regulating valve group is connected to the oil tank; under normal conditions, the P port and A port of the pilot control valve are connected, and the B port is connected to the X port of the feed regulating valve group; after reversal, the P port and A port are disconnected, and the B port is blocked; the 3 ports of the shuttle valve III are connected to the X port of the feed regulating valve group, the inlet of the lubrication speed regulating valve, and the Z port of the oil control air valve, respectively.

[0012] The aforementioned hydraulic control system for impact rotary drilling of the underground drilling machine also includes a pressure relief valve; the U port of the proportional multi-way valve is connected to the pressure relief valve, the T port is connected to the oil tank, and the LS port is connected to the X port of the variable pump.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Through the aforementioned hydraulic control system for impact rotary drilling, the impact rotary drilling rig can perform stepless speed adjustment between two speeds. It can flexibly use high-frequency or low-frequency impact operation according to rock strata and geological conditions, greatly expanding the equipment's application range. It can be used in high-hardness rock strata, weathered rock strata, and hard and brittle geological formations. During low-frequency impact operation, "one-button linkage" operation can be achieved, meaning that operating the impact pilot handle can complete the drilling rig's feed, rotation, and impact functions. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 Hydraulic schematic diagram of the hydraulic control system for impact rotary drilling of a jackhammer;

[0017] Figure 2 This is a schematic diagram of the water flushing control valve.

[0018] In the diagram: 1-Variable pump, 2-Pilot oil source control valve assembly, 201-Manual directional valve, 202-Pressure reducing valve I, 203-Pressure regulating valve I, 204-Flow regulating valve, 205-Pressure regulating valve II, 3-Return oil filter, 4-Water source, 5-Stop valve, 6-Water filter, 7-Water circuit pressure reducing valve, 8-Water circuit safety valve, 9-Oil / water radiator, 10-Bypass check valve, 11-Air source, 12-Ball 13-Air filter, 14-Compressed air pressure regulating valve, 15-Oil-controlled air valve, 16-Lubrication drive device, 1601-Lubrication pump drive motor, 1602-Lubrication pump, 17-Lubrication speed control valve, 18-Proportional multi-way valve, 19-Shuttle valve I, 20-One-way pressure reducing valve, 21-Shuttle valve II, 22-Drilling rig pilot handle assembly, 2201-Impact pilot handle, 2202-Rotary pilot handle, 2203 - Feed pilot handle, 23- Impact rotary drilling rig, 2301- Drilling rig rotary motor, 2302- Drilling rig impact control valve, 24- Water flushing control valve, 2401- Valve body, 2402- Valve plate, 2403- Valve core, 2404- Sealing seat, 2405- Locking cover, 2406- Pressure spring, 2407- O-ring I, 2408- Plug, 2409- O-ring II, 24010- O-ring Ring III, 24011-Copper gasket, 24012-Bolt, 24013-Spring washer, 25-Quick connector I, 26-Quick connector II, 27-Shuttle valve III, 28-Pressure relief valve, 29-Feed regulating valve assembly, 2901-Pilot control valve, 2902-Pressure reducing valve II, 2903-Check valve, 30-Two-way hydraulic lock, 31-Drilling rig feed cylinder, 32-Quick connector III, 33-Quick connector IV. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1As shown, this embodiment provides a hydraulic control system for a bottom-mounted rotary drilling rig, including a variable pump 1, a pilot oil source control valve group 2, a proportional multi-way valve 18, a shuttle valve I 19, a one-way pressure reducing valve 20, a shuttle valve II 21, a drilling rig pilot handle group 22, a rotary drilling rig 23, a two-way hydraulic lock 30, and a drilling rig feed cylinder 31; the hydraulic oil output by the variable pump 1 is pumped to the P port of the pilot oil source control valve group 2 and the proportional multi-way valve respectively. 18 has a P port; the impact rotary drilling rig 23 includes a drilling rig rotary motor 2301 and a drilling rig impact control valve 2302; the proportional multi-way valve 18 includes a three-way valve core, valve core VI corresponds to ports A6, B6, a6, and b6, valve core VII corresponds to ports A7, B7, a7, and b7, and valve core VIII corresponds to ports A8, B8, a8, and b8; ports A6 and B6 of the proportional multi-way valve 18 are respectively connected to the bidirectional hydraulic lock 30. The V1 and V2 ports are connected; the C1 and C2 ports of the bidirectional hydraulic lock 30 are connected to the piston chamber and piston rod chamber of the drill rig feed cylinder 31, respectively; the A7 and B7 ports of the proportional multi-way valve 18 are connected to the A7 and B7 ports of the drill rig rotary motor 2301, respectively; the A8 and B8 ports of the proportional multi-way valve 18 are both connected to the A8 port of the drill rig impact control valve 2302; the Pv port of the pilot oil source control valve group 2 is connected to the P port of the drill rig pilot handle group 22; the drill rig pilot handle group 22 includes an impact pilot handle 2201, a rotary pilot handle 2202, and a feed pilot handle 2203, and the P ports of the drill rig pilot handle group 22 are connected to the P ports of the impact pilot handle 2201, the rotary pilot handle 2202, and the feed pilot handle 2203, respectively; the a8 port of the impact pilot handle 2201 is connected to the a8 port of the proportional multi-way valve 18. Port b8 is connected to port b8 of proportional multi-way valve 18, port 1 of shuttle valve II 21, and the inlet of one-way pressure reducing valve 20, respectively; port a7 of rotary pilot handle 2202 is connected to port 2 of shuttle valve II 21, and port b7 is connected to port b7 of proportional multi-way valve 18; port 3 of shuttle valve II 21 is connected to port a7 of proportional multi-way valve 18; the outlet of one-way pressure reducing valve 20 is connected to port 1 of shuttle valve I 19; port a6 of feed pilot handle 2203 is connected to port 2 of shuttle valve I 19. Port b6 is connected to port b6 of proportional multi-way valve 18; port 3 of shuttle valve I 19 is connected to port a6 of proportional multi-way valve 18; port T of impact pilot handle 2201, port T of rotary pilot handle 2202, and port T of feed pilot handle 2203 are all connected to port T of drilling rig pilot handle assembly 22, and port T of drilling rig pilot handle assembly 22 is connected to oil tank; port R of proportional multi-way valve 18 and port T of drilling rig impact control valve 2302 are both connected to oil tank.

[0021] The proportional multi-way valve 18 is controlled by pilot oil supplied by the drill rig pilot handle assembly 22. The output pressure of the pilot handle is proportional to the operating angle of the handle, and the output flow rate of the proportional multi-way valve 18 is proportional to the pilot control pressure. In the proportional multi-way valve 18, valve core VIII controls the impact drilling of the drill rod, valve core VII controls the forward and reverse rotation of the drill rod, and valve core VI controls the feed and retraction of the impact rotary drill rig 23.

[0022] When the impact pilot handle 2201 is operated, the pilot oil is output from port P of the drilling rig pilot handle assembly 22 to port a8 or b8, and is output proportionally according to the angle of the operating handle. When port a8 outputs pressure oil, it goes directly to port a8 of the proportional multi-way valve 18, pushing the valve core VIII to move, so that the pressure oil provided by the variable pump 1 is output from port P of the proportional multi-way valve 18 to port A8, and then reaches port A8 of the drilling rig impact control valve 2302, realizing high-frequency drilling. When the pilot handle assembly 22 of the drilling rig outputs pressure oil at port b8, the first path goes directly to port b8 of the proportional multi-way valve 18, pushing valve core VIII to move, causing the pressure oil provided by variable pump 1 to be output through port P of the proportional multi-way valve 18 to port B8, and then to port A8 of the drilling rig impact control valve 2302, realizing low-frequency drilling; the second path goes to port 1 of shuttle valve II 21, through port 3 of shuttle valve II 21 to port a7 of the proportional multi-way valve 18, pushing valve core VII to move, causing the pressure oil provided by variable pump 1 to be output through port P of the proportional multi-way valve 18 to move, thus realizing low-frequency drilling. The hydraulic oil is output from port P of the proportional multi-way valve 18 to port A7, and then to port A7 of the drilling rig rotary motor 2301, causing the drilling rig rotary motor 2301 to rotate. The third path passes through the one-way pressure reducing valve 20 to port 1 of shuttle valve I 19, then through port 3 of shuttle valve I 19 to port a6 of the proportional multi-way valve 18, pushing valve core VI to move. This causes the pressure oil supplied by variable pump 1 to be output from port P of the proportional multi-way valve 18 to port A6, and then to the piston chamber of the drilling rig feed cylinder 31, achieving the feed action. By manipulating the impact pilot handle 2201 in the a8 direction, high-frequency drilling of the impact rotary drilling rig 23 is achieved. By manipulating the impact pilot handle 2201 in the b8 direction, one-button linkage of feed, rotation, and low-frequency drilling of the impact rotary drilling rig 23 is achieved.

[0023] When the pilot handle 2202 is operated, the pilot oil is output from port P of the pilot handle assembly 22 to port a7 or port b7. When port a7 outputs pressure oil, it passes through ports 2 and 3 of shuttle valve II to port a7 of proportional multi-way valve 18, pushing valve core VII to move. This causes the pressure oil provided by variable pump 1 to be output from port P of proportional multi-way valve 18 to port A7, and the drilling rig rotary motor 2301 rotates in the forward direction. When port b7 of the pilot handle assembly 22 outputs pressure oil, it goes directly to port b7 of proportional multi-way valve 18, pushing valve core VII to move. This causes the pressure oil provided by variable pump 1 to be output from port P of proportional multi-way valve 18 to port B7, and the drilling rig rotary motor 2301 rotates in the reverse direction.

[0024] When the feed pilot handle 2203 is operated, the pilot oil is output from port P of the drilling rig pilot handle assembly 22 to port a6 or port b6. When port a6 outputs pressure oil, it passes through ports 2 and 3 of shuttle valve I 19 to port a6 of proportional multi-way valve 18, pushing valve core VI to move. This causes the pressure oil provided by variable pump 1 to be output from port P of proportional multi-way valve 18 to port A6, and the drilling rig feed cylinder 31 extends. When port b6 of the drilling rig pilot handle assembly 22 outputs pressure oil, it goes directly to port b6 of proportional multi-way valve 18, pushing valve core VI to move. This causes the pressure oil provided by variable pump 1 to be output from port P of proportional multi-way valve 18 to port B6, and the drilling rig feed cylinder 31 retracts.

[0025] By adjusting the pressure after pressure reduction by the one-way pressure reducing valve 20, the pilot oil pressure at port A6 of the proportional multi-way valve 18 is controlled, thereby controlling the output flow rate at port A6 of the proportional multi-way valve 18 and adjusting the speed of the drilling rig feed cylinder 31 at any time.

[0026] like Figure 1 As shown, in the above-mentioned hydraulic control system for impact rotary drilling of the jackhammer, the pilot oil source control valve group 2 includes a manual directional valve 201, a pressure reducing valve I 202, a pressure regulating valve I 203, a flow regulating valve 204, and a pressure regulating valve II 205. The P port of the pilot oil source control valve group 2 is connected to the P port of the manual directional valve 201 and the inlet of the pressure reducing valve I 202, respectively. The A port of the manual directional valve 201 is connected to the inlet of the flow regulating valve 204, and the outlet of the flow regulating valve 204 is connected to the WA port of the pilot oil source control valve group 2, the inlet of the pressure regulating valve II 205, and the pilot oil source control valve group 2. The LS port of valve 2 is connected, and the outlet of pressure reducing valve I 202 is connected to the inlet of pressure regulating valve I 203 and the Pv port of pilot oil source control valve group 2, respectively. The WR port of pilot oil source control valve group 2, the outlet of pressure regulating valve I 203, the outlet of pressure regulating valve II 205, and the T port of manual directional valve 201 are all connected to the R port of pilot oil source control valve group 2. Under normal conditions, the P port of manual directional valve 201 is blocked, and the A port is connected to the T port. After reversing, the P port is connected to the A port, and the T port is blocked. The WA port of pilot oil source control valve group 2 is connected to quick connector III 32, and the WR port is connected to quick connector IV 33.

[0027] When the manual directional valve 201 is in its normal state, port P is blocked, and ports A and T are open, forming port R. The pressure oil from the outlet of variable pump 1 is reduced in pressure by port P of pilot oil source control valve group 2 and pressure reducing valve I 202 before reaching port Pv of pilot oil source control valve group 2. Pressure regulating valve I 203 protects the pressure of pressure reducing valve I 202. When the manual directional valve 201 is switched to the left position, the pressure oil flows from port P of pilot oil source control valve group 2 to port A of manual directional valve 201, where the flow rate is adjusted by flow regulating valve 204, reaching port WA. When an external load is connected via quick-connect connector III 32, it can provide the pressure oil adjusted by flow regulating valve 204. The maximum pressure of this pressure oil is adjusted by flow regulating valve 204. The external load is connected to the return oil via quick-connect connector IV 33.

[0028] The pilot oil source control valve group 2 can not only provide a certain amount of depressurized oil source to the pilot handle group 22 of the drilling rig, but also reserve a certain flow of oil source for the external load through manual reversing valve 201. The oil inlet and outlet of the load are achieved through quick-connect coupling.

[0029] like Figure 1 As shown, the hydraulic control system for the impact rotary drilling rig also includes a water source 4, a shut-off valve 5, a water filter 6, a water pressure reducing valve 7, a water safety valve 8, an oil / water radiator 9, and a water flushing control valve 24. The water source 4 is connected to the inlet of the shut-off valve 5, the outlet of the shut-off valve 5 is connected to the inlet of the water filter 6, the outlet of the water filter 6 is connected to the inlet of the water pressure reducing valve 7, the outlet of the water pressure reducing valve 7 is connected to the inlet of the water safety valve 8 and the inlet of the oil / water radiator 9, the outlet of the oil / water radiator 9 is connected to the P1 port of the water flushing control valve 24, and the A1 port of the water flushing control valve 24 is connected to the W port of the impact rotary drilling rig 23. Under normal conditions, the P1 port and the A1 port of the water flushing control valve 24 are disconnected, and after reversing, the P1 port and the A1 port are connected. The A8 port of the proportional multi-way valve 18 is connected to the WX1 port of the water flushing control valve 24.

[0030] Water source 4 is supplied externally. When the impact rotary drilling rig 23 is working, the shut-off valve 5 is opened first. Water source 4 is filtered by water filter 6, and after the pressure is reduced and stabilized by water circuit pressure reducing valve 7, it passes through oil / water radiator 9 to reach port P1 of water circuit flushing control valve 24.

[0031] When the proportional multi-way valve 18 outputs pressurized oil from port A8, the first path reaches port A8 of the drilling rig impact control valve 2302 for high-speed (high-frequency) drilling. The second path reaches port WX1 of the water flushing control valve 24, causing the water flushing control valve 24 to switch directions, connecting port P1 with port A1. Water source 4, after passing through the water flushing control valve 24, reaches port W of the impact rotary drilling rig 23, ensuring water flushing during high-frequency drilling, thus reducing dust and lowering the temperature. This setup automatically connects water source 4 during high-frequency drilling and disconnects it during low-frequency drilling.

[0032] like Figure 2 As shown, in the above-mentioned hydraulic control system for impact rotary drilling of the underfloor drilling machine, the water flushing control valve 24 includes a valve body 2401, a valve plate 2402, a valve core 2403, a sealing seat 2404, a locking cover 2405, a pressure spring 2406, an O-ring I 2407, a plug 2408, an O-ring II 2409, an O-ring III 24010, a copper gasket 24011, a bolt 24012, and a spring washer 24013; the valve body Valve body 2401 is provided with port P1, port A1, and mounting holes; the mounting holes penetrate two opposite end faces of valve body 2401, which are respectively mounting section I, mounting section II, and mounting section III. The end face where mounting section I and mounting section II meet is a conical surface. The diameter of mounting section II is smaller than the diameter of mounting section I and the diameter of mounting section III. Mounting section I is connected to port P1, and mounting section II is connected to port A1. Valve plate 2402 and lock cover 2405 are mounted on valve body 2401. At both ends of 01, valve plate 2402 is fixed to valve body 2401 by bolts 24012 and spring washers 24013, and lock cover 2405 is tightened onto valve body 2401 by threaded fasteners. Valve plate 2402 is provided with WX1 port, which communicates with mounting section III. Valve core 2403 and sealing seat 2404 are slidably installed in mounting hole. Valve core 2403 includes valve core section I, valve core section II and valve core section III with successively increasing diameters. The diameter of valve core section II matches the diameter of mounting section II, and the diameter of valve core section III matches the diameter of mounting section III. Sealing seat 2404 includes sealing section I and sealing section II connected in sequence. Sealing section I is slidably inserted into lock cover 2405. Sealing section II is provided with a tapered end that matches the tapered surface. Sealing section II is inserted into valve core section I. Pressure spring 2406 is sleeved on sealing section I, and its two ends are connected to lock cover 2405 and sealing section II respectively. Under the action of the pressure spring 2406, the sealing seat 2404 seals against the conical surface of the valve body 2401, sealing the passage between port P1 and port A1. O-rings III 24010 are installed between the valve plate 2402 and the valve body 2401, and between the locking cover 2405 and the valve body 2401. A copper gasket 24011 is installed between the plug 2408 and the valve body 2401. Two seals, O-rings I 2407 and II 2409, are installed between the valve core 2403 and the valve body 2401. When pressurized oil enters through port WX1, it pushes the valve core 2403 to the left, compressing the pressure spring 2406 and separating the sealing seat 2404 from the valve body 2401, thus opening the passage between port P1 and port A1.

[0033] like Figure 1As shown, the hydraulic control system for the impact rotary drilling of the above-mentioned rig also includes a return oil filter 3, a bypass check valve 10, quick-connect coupling I 25, and quick-connect coupling II 26; the A8 port of the proportional multi-way valve 18 is connected to the quick-connect coupling I 25 and the WX1 port of the water flushing control valve 24, respectively, and the B8 port is connected to the quick-connect coupling II 26; both quick-connect coupling I 25 and quick-connect coupling II 26 are connected to the A8 port of the drilling rig impact control valve 2302; the R port of the proportional multi-way valve 18 and the T port of the drilling rig impact control valve 2302 merge and then split into two paths, the first path is connected to the oil inlet of the oil / water radiator 9, and the second path is connected to the inlet of the bypass check valve 10. The oil outlet of the oil / water radiator 9 and the outlet of the bypass check valve 10 are both connected to the return oil filter 3, and the outlet of the return oil filter 3 is connected to the oil tank.

[0034] The T port of the drilling rig impact control valve 2302 is connected to the oil inlet of the oil / water radiator 9. It works in conjunction with the automatic water supply 4 during high-frequency drilling to enable the hydraulic oil to be cooled by water cooling, i.e., by the oil / water radiator 9, during high-frequency drilling.

[0035] like Figure 1 As shown, the hydraulic control system for the impact rotary drilling rig also includes an air source 11, a ball valve 12, an air filter 13, a compressed air pressure regulating valve 14, an oil-controlled air valve 15, a lubrication drive device 16, a lubrication speed regulating valve 17, and a shuttle valve Ⅲ 27. The air source 11 is connected to the inlet of the ball valve 12, the outlet of the ball valve 12 is connected to the inlet of the air filter 13, the outlet of the air filter 13 is connected to the inlet of the compressed air pressure regulating valve 14, the outlet of the compressed air pressure regulating valve 14 is connected to port A of the oil-controlled air valve 15, and port B of the oil-controlled air valve 15 is connected to port Ps of the impact rotary drilling rig 23. Under normal conditions, ports A and B of the oil-controlled air valve 15 are disconnected, and after reversing, ports A and B are connected. Port A7 of the proportional multi-way valve 18 is connected to port A7 of the drilling rig rotary motor 2301 and port 1 of shuttle valve III 27, respectively. Port B7 is connected to port B7 of the drilling rig rotary motor 2301 and port 2 of shuttle valve III 27, respectively. Port 3 of shuttle valve III 27 is connected to the inlet of the lubrication speed control valve 17 and port Z of the oil control air valve 15, respectively. The outlet of the lubrication speed control valve 17 is connected to the lubrication pump drive motor 1601 in the lubrication drive device 16. The lubrication pump 1602 in the lubrication drive device 16 is driven to rotate by the lubrication pump drive motor 1601. The inlet of the lubrication pump 1602 is connected to the lubrication oil tank, and the outlet of the lubrication pump 1602 is connected between the oil control air valve 15 and the impact rotary drilling rig 23.

[0036] Air source 11 is supplied by an external air source, and after the pressure is adjusted by ball valve 12, air filter 13, and compressed air pressure regulating valve 14, it reaches port A of oil-controlled air valve 15. Under normal conditions, ports A and B of oil-controlled air valve 15 are disconnected. When there is pressurized oil at port Z, the valve is pushed to the right position, and ports A and B are connected.

[0037] In the lubrication drive device 16, the lubrication pump drive motor 1601 drives the lubrication pump 1602, and the two are connected by an eccentric shaft. The amount of oil output from the lubrication pump 1602 can be controlled according to the speed of the lubrication pump drive motor 1601. The outlet of the lubrication pump 1602 is connected to the Ps port of the impact rotary drill 23, which can guide the lubricating oil to be delivered into the impact rotary drill 23 for lubrication.

[0038] The lubrication drive device 16 is automatically triggered when the drilling rig rotary motor 2301 operates. Regardless of whether the drilling rig rotary motor 2301 rotates forward or backward, i.e., regardless of whether pressure oil is output from port A7 or port B7 of the proportional multi-way valve 18, the pressure oil can enter port A7 of the drilling rig rotary motor 2301 and port 1 of shuttle valve III 27, or enter port B7 of the drilling rig rotary motor 2301 and port 2 of shuttle valve III 27. Simultaneously, as the drilling rig rotary motor 2301 rotates, the pressure oil passes through port 3 of shuttle valve III 27 to the inlet of the lubrication speed control valve 17 and port Z of the oil-controlled air valve 15. The lubrication pump drive motor 1601 starts, driving the lubrication pump 1602 to output lubricating oil, the speed of which can be adjusted by the lubrication speed control valve 17. Under the action of the pressure oil, port Z of the oil-controlled air valve 15 is switched to the right position, i.e., port A and port B are connected. Compressed air enters port Ps of the impact rotary drilling rig 23 through this valve and mixes with the lubricating oil. The above settings enable the automatic start of compressed air and lubricating oil output when the drilling rig rotary motor 2301 rotates.

[0039] like Figure 1 As shown, the hydraulic control system for the above-mentioned bottom-mounted rotary drilling impact system also includes a feed regulating valve assembly 29; the A6 port of the proportional multi-way valve 18 is connected to the V port of the feed regulating valve assembly 29, and the Z port of the feed regulating valve assembly 29 is connected to the V1 port of the two-way hydraulic lock 30; the feed regulating valve assembly 29 includes a pilot control valve 2901, a pressure reducing valve II 2902, and a check valve 2903; the V port of the feed regulating valve assembly 29 is connected to the inlet of the pressure reducing valve II 2902 and the outlet of the check valve 2903, respectively; the outlet of the pressure reducing valve II 2902 is connected to the P port of the pilot control valve 2901. The pilot control valve 2901's port A and the check valve 2903's inlet are both connected to the feed regulating valve group 29's port Z. The pilot control valve 2901's control port is connected to the feed regulating valve group 29's port X. The feed regulating valve group 29's port L is connected to the oil tank. Under normal conditions, the pilot control valve 2901's port P and port A are connected, and port B is connected to the feed regulating valve group 29's port X. After reversing, port P and port A are disconnected, and port B is blocked. The shuttle valve Ⅲ 27's ports 3 are respectively connected to the feed regulating valve group 29's port X, the lubrication speed regulating valve 17's inlet, and the oil control air valve 15's port Z.

[0040] When there is pilot oil at port a6 or b6 of the proportional multi-way valve 18, pressure oil is output from port A6 or B6. When pressure oil is output from port A6, it reaches port V of the feed regulating valve group 29, passes through pressure reducing valve II 2902, and then reaches ports P and A of the pilot control valve 2901. From port Z of the feed regulating valve group 29, it enters port V1 of the bidirectional hydraulic lock 30, and then through port C1 into the piston chamber of the drill rig feed cylinder 31, pushing the impact rotary drill 23 to feed. The oil in the piston rod chamber returns to the oil tank through ports C2 and V2 of the bidirectional hydraulic lock 30 and port B6 of the proportional multi-way valve 18. Conversely, when pressure oil is output from port B6 of the proportional multi-way valve 18, it enters the piston rod chamber of the drill rig feed cylinder 31 through ports V2 and C2 of the bidirectional hydraulic lock 30, and the feed is withdrawn.

[0041] When there is pilot oil at port a7 or port b7 of the proportional multi-way valve 18, port A7 or port B7 outputs pressure oil. Port A7 of the proportional multi-way valve 18 is connected to port A7 of the drilling rig rotary motor 2301 and port 1 of shuttle valve III 27, respectively. Port B7 is connected to port B7 of the drilling rig rotary motor 2301 and port 2 of shuttle valve III 27, respectively. When the pressure at port A7 or port B7 of the proportional multi-way valve 18 reaches a certain value, the pressure oil goes through port 3 of shuttle valve III 27 to port X of feed regulating valve group 29, pushing pilot control valve 2901 to switch to the lower position, that is, ports P, A and B are all closed. At this time, when port A6 of the proportional multi-way valve 18 outputs pressure oil, it goes through port V of feed regulating valve group 29 and pressure reducing valve II 2902 to port P of pilot control valve 2901. At this time, port P is closed, and the drilling rig feed cylinder 31 stops feeding. When the proportional multi-way valve 18 outputs pressurized oil through port B6, it enters the piston rod chamber of the drill rig's feed cylinder 31 via ports V2 and C2 of the bidirectional hydraulic lock 30. The hydraulic oil in the piston chamber returns to the oil tank via the bidirectional hydraulic lock 30, port Z of the feed regulating valve group 29, check valve 2903, port V of the feed regulating valve group 29, and port A6 of the proportional multi-way valve 18, allowing the feed to exit. This configuration enables the impact rotary drill rig 23 to automatically stop feeding when the rotational pressure is high, preventing damage to the impact rotary drill rig 23.

[0042] like Figure 1 As shown, the hydraulic control system of the bottom drilling machine that integrates crushing and impact rotary drilling also includes a pressure relief valve 28; the U port of the proportional multi-way valve 18 is connected to the pressure relief valve 28, the T port is connected to the oil tank, and the LS port is connected to the X port of the variable pump 1.

[0043] The feed force can be adjusted at any time according to the drilling conditions by adjusting the pressure relief valve 28.

[0044] When the variable pump 1 is working normally, it is controlled by load feedback through its X port. When there is no pressure at the X port, the variable pump 1 is in standby mode. When the impact rotary drilling rig 23 starts working, its load reaches the X port of the variable pump 1 through the LS port of the proportional multi-way valve 18, and the variable pump 1 can work normally.

[0045] The aforementioned hydraulic control system for impact rotary drilling of the bottom-mounted machine can be applied to the bottom-mounted machine in the fully mechanized mining face of an underground coal mine for impact drilling during bottom drum repair, side and top anchor bolt installation, or wall repair, and has the following advantages.

[0046] 1. The impact rotary drilling rig 23 can be infinitely speed-adjusted between two speeds, allowing for flexible use of high-frequency or low-frequency impact operations depending on the rock strata and geological conditions. This greatly expands the equipment's application range, making it suitable for hard rock strata, weathered rock strata, and hard and brittle geological formations. During low-frequency impact operation, a "one-button linkage" operation is achieved; simply operating the impact pilot handle 2201 completes the drilling rig's feed, rotation, and impact functions. During high-frequency operation, the water flushing control valve 24 automatically opens to remove dust and cool the rig, reducing drill bit jamming and significantly improving drilling efficiency.

[0047] 2. An innovative water flushing control valve 24 was designed to automatically connect the water source 4 during high-frequency drilling and disconnect the water source 4 during low-frequency drilling. At the same time, the hydraulic oil is cooled by the water-cooled oil / water radiator 9 during high-frequency drilling.

[0048] 3. When the drilling rig rotary motor 2301 rotates, it automatically starts the output of compressed air and lubricating oil, and lubricates the equipment according to the preset ratio, so as to avoid premature wear or other consequences caused by negligence in lubrication.

[0049] 4. The control system is designed with a feed regulating valve group 29 to automatically stop the feed when the rotary impact drill 23 has high rotational pressure, so as to avoid damage to the rotary impact drill 23.

[0050] 5. By systematically controlling hydraulic oil, compressed air, and water, the equipment's working efficiency, adaptability, and operational safety are improved.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic control system for impact rotary drilling of a bottom-mounted drilling machine, characterized in that, Includes a variable pump (1), a pilot oil source control valve group (2), a proportional multi-way valve (18), a shuttle valve I (19), a one-way pressure reducing valve (20), a shuttle valve II (21), a drilling rig pilot handle group (22), an impact rotary drilling rig (23), a two-way hydraulic lock (30), and a drilling rig feed cylinder (31). The hydraulic oil output by the variable pump (1) is pumped to the P port of the pilot oil source control valve group (2) and the P port of the proportional multi-way valve (18). The impact rotary drilling rig (23) includes a drilling rig rotary motor (2301) and a drilling rig impact control valve (2302). The proportional multi-way valve (18) includes a triple valve core, valve core VI corresponds to ports A6, B6, a6 and b6, valve core VII corresponds to ports A7, B7, a7 and b7, and valve core VIII corresponds to ports A8, B8, a8 and b8. The A6 port and B6 port of the proportional multi-way valve (18) are respectively connected to the V1 port and V2 port of the bidirectional hydraulic lock (30); The C1 port and C2 port of the bidirectional hydraulic lock (30) are respectively connected to the piston chamber and piston rod chamber of the drilling rig feed cylinder (31); The A7 port and B7 port of the proportional multi-way valve (18) are respectively connected to the A7 port and B7 port of the drilling rig rotary motor (2301); The A8 port and B8 port of the proportional multi-way valve (18) are both connected to the A8 port of the drilling rig impact control valve (2302); The Pv port of the pilot oil source control valve group (2) is connected to the P port of the drilling rig pilot handle group (22); The drilling rig pilot handle assembly (22) includes an impact pilot handle (2201), a rotary pilot handle (2202), and a feed pilot handle (2203). The P port of the drilling rig pilot handle assembly (22) is connected to the P port of the impact pilot handle (2201), the P port of the rotary pilot handle (2202), and the P port of the feed pilot handle (2203), respectively. The a8 port of the impact pilot handle (2201) is connected to the a8 port of the proportional multi-way valve (18), and the b8 port is connected to the b8 port of the proportional multi-way valve (18), the 1 port of the shuttle valve II (21), and the inlet of the one-way pressure reducing valve (20), respectively. The a7 port of the rotary pilot handle (2202) is connected to the 2 port of the shuttle valve II (21), and the b7 port is connected to the b8 port of the proportional multi-way valve (18). The 3 port of the shuttle valve II (21) is connected to the a7 port of the proportional multi-way valve (18); The outlet of the one-way pressure reducing valve (20) is connected to port 1 of the shuttle valve I (19); The feed pilot handle (2203) has port a6 connected to port 2 of shuttle valve I (19) and port b6 connected to port b6 of proportional multi-way valve (18). The 3 port of the shuttle valve I (19) is connected to the a6 port of the proportional multi-way valve (18); The T-ports of the impact pilot handle (2201), the rotary pilot handle (2202), and the feed pilot handle (2203) are all connected to the T-ports of the drilling rig pilot handle assembly (22), and the T-ports of the drilling rig pilot handle assembly (22) are connected to the oil tank. The R port of the proportional multi-way valve (18) and the T port of the drilling rig impact control valve (2302) are both connected to the oil tank.

2. The hydraulic control system for impact rotary drilling of a bottom-mounted drilling machine according to claim 1, characterized in that, The pilot oil source control valve group (2) includes a manual reversing valve (201), a pressure reducing valve I (202), a pressure regulating valve I (203), a flow regulating valve (204), and a pressure regulating valve II (205); The P port of the pilot oil source control valve group (2) is connected to the P port of the manual directional valve (201) and the inlet of the pressure reducing valve I (202), respectively. The A port of the manual directional valve (201) is connected to the inlet of the flow regulating valve (204). The outlet of the flow regulating valve (204) is connected to the WA port of the pilot oil source control valve group (2), the inlet of the pressure regulating valve II (205), and the LS port of the pilot oil source control valve group (2), respectively. The outlet of the pressure reducing valve I (202) is connected to the inlet of the pressure regulating valve I (203) and the Pv port of the pilot oil source control valve group (2), respectively. The WR port of the pilot oil source control valve group (2), the outlet of the pressure regulating valve I (203), the outlet of the pressure regulating valve II (205), and the T port of the manual directional valve (201) are all connected to the R port of the pilot oil source control valve group (2). The manual reversing valve (201) is normally blocked at port P and connected to port A and port T. After reversing, port P is connected to port A and port T is blocked. The WA port of the pilot oil source control valve group (2) is connected to quick connector III (32), and the WR port is connected to quick connector IV (33).

3. The hydraulic control system for impact rotary drilling of a bottom-mounted drilling machine according to claim 1, characterized in that, It also includes a water source (4), a shut-off valve (5), a water filter (6), a water circuit pressure reducing valve (7), a water circuit safety valve (8), an oil / water radiator (9), and a water circuit flushing control valve (24). The water source (4) is connected to the inlet of the shut-off valve (5), the outlet of the shut-off valve (5) is connected to the inlet of the water filter (6), the outlet of the water filter (6) is connected to the inlet of the water pressure reducing valve (7), the outlet of the water pressure reducing valve (7) is connected to the inlet of the water safety valve (8) and the inlet of the oil / water radiator (9), the outlet of the oil / water radiator (9) is connected to the P1 port of the water flushing control valve (24), and the A1 port of the water flushing control valve (24) is connected to the W port of the impact rotary drilling rig (23). The water flushing control valve (24) normally disconnects port P1 and port A1, and connects port P1 and port A1 after reversal; The A8 port of the proportional multi-way valve (18) is connected to the WX1 port of the water flushing control valve (24).

4. The hydraulic control system for impact rotary drilling of a jackhammer according to claim 3, characterized in that, The water flushing control valve (24) includes a valve body (2401), a valve plate (2402), a valve core (2403), a sealing seat (2404), a locking cover (2405), and a pressure spring (2406). The valve body (2401) is provided with a P1 port, an A1 port and a mounting hole; The mounting hole passes through the two opposite end faces of the valve body (2401), which are respectively mounting section I, mounting section II and mounting section III. The end face where mounting section I and mounting section II meet is a conical surface. The diameter of mounting section II is smaller than the diameter of mounting section I and the diameter of mounting section III. Mounting section I is connected to port P1 and mounting section II is connected to port A1. The valve plate (2402) and the lock cover (2405) are installed at both ends of the valve body (2401). The valve plate (2402) is provided with a WX1 port, which is connected to the installation section III. The valve core (2403) and the sealing seat (2404) are slidably installed in the mounting hole; The valve core (2403) includes valve core section I, valve core section II and valve core section III with successively increasing diameters. The diameter of valve core section II matches the diameter of mounting section II, and the diameter of valve core section III matches the diameter of mounting section III. The sealing seat (2404) includes a sealing section I and a sealing section II connected in sequence. The sealing section I is slidably inserted into the lock cover (2405). The sealing section II is provided with a tapered end that mates with the tapered surface. The sealing section II is inserted into the valve core section I. The pressure spring (2406) is sleeved on the sealing section I, and its two ends are connected to the lock cover (2405) and the sealing section II, respectively.

5. The hydraulic control system for impact rotary drilling of a jackhammer according to claim 3, characterized in that, It also includes a return oil filter (3) and a bypass check valve (10); After the R port of the proportional multi-way valve (18) and the T port of the drilling rig impact control valve (2302) merge, they are divided into two paths. The first path is connected to the oil inlet of the oil / water radiator (9), and the second path is connected to the inlet of the bypass check valve (10). The oil outlet of the oil / water radiator (9) and the outlet of the bypass check valve (10) are both connected to the return oil filter (3). The outlet of the return oil filter (3) is connected to the oil tank.

6. The hydraulic control system for impact rotary drilling of a jackhammer according to claim 3, characterized in that, It also includes quick-connect connector I (25) and quick-connect connector II (26); The A8 port of the proportional multi-way valve (18) is connected to the quick-connect connector I (25) and the WX1 port of the water flushing control valve (24) respectively, and the B8 port is connected to the quick-connect connector II (26); Both quick-connector I (25) and quick-connector II (26) are connected to port A8 of the drilling rig impact control valve (2302).

7. The hydraulic control system for impact rotary drilling of a bottom-mounted drilling machine according to claim 5, characterized in that, It also includes an air source (11), a ball valve (12), an air filter (13), a compressed air pressure regulating valve (14), an oil control air valve (15), a lubrication drive device (16), a lubrication speed regulating valve (17), and a shuttle valve III (27). The air source (11) is connected to the inlet of the ball valve (12), the outlet of the ball valve (12) is connected to the inlet of the air filter (13), the outlet of the air filter (13) is connected to the inlet of the compressed air pressure regulating valve (14), the outlet of the compressed air pressure regulating valve (14) is connected to the A port of the oil control air valve (15), and the B port of the oil control air valve (15) is connected to the Ps port of the impact rotary drilling rig (23). The oil-controlled air valve (15) is normally disconnected at ports A and B, and connected at ports A and B after reversal. The A7 port of the proportional multi-way valve (18) is connected to the A7 port of the drilling rig rotary motor (2301) and the 1 port of the shuttle valve III (27), respectively, and the B7 port is connected to the B7 port of the drilling rig rotary motor (2301) and the 2 port of the shuttle valve III (27), respectively. The three ports of the shuttle valve III (27) are respectively connected to the inlet of the lubrication speed regulating valve (17) and the Z port of the oil control air valve (15); The outlet of the lubrication speed regulating valve (17) is connected to the lubrication pump drive motor (1601) in the lubrication drive device (16). The lubrication pump (1602) in the lubrication drive device (16) is driven to rotate by the lubrication pump drive motor (1601). The inlet of the lubrication pump (1602) is connected to the lubricating oil tank. The outlet of the lubrication pump (1602) is connected between the oil control air valve (15) and the impact rotary drilling rig (23).

8. The hydraulic control system for impact rotary drilling of a jackhammer according to claim 7, characterized in that, It also includes a feed control valve assembly (29); The A6 port of the proportional multi-way valve (18) is connected to the V port of the feed regulating valve group (29), and the Z port of the feed regulating valve group (29) is connected to the V1 port of the two-way hydraulic lock (30). The feed regulating valve assembly (29) includes a pilot control valve (2901), a pressure reducing valve II (2902), and a check valve (2903). The V port of the feed regulating valve assembly (29) is connected to the inlet of the pressure reducing valve II (2902) and the outlet of the check valve (2903), respectively. The outlet of the pressure reducing valve II (2902) is connected to the P port of the pilot control valve (2901). The A port of the pilot control valve (2901) and the inlet of the check valve (2903) are both connected to the Z port of the feed regulating valve assembly (29). The control port of the pilot control valve (2901) is connected to the X port of the feed regulating valve assembly (29). The L port of the feed regulating valve assembly (29) is connected to the oil tank. Under normal conditions, the pilot control valve (2901) has its P port connected to its A port and its B port connected to the X port of the feed regulating valve group (29). After reversal, the P port and the A port are disconnected and the B port is blocked. The three ports of shuttle valve III (27) are respectively connected to the X port of feed regulating valve group (29), the inlet of lubrication speed regulating valve (17) and the Z port of oil control air valve (15).

9. The hydraulic control system for impact rotary drilling of a bottom-mounted drilling machine according to claim 8, characterized in that, It also includes a pressure relief valve (28); The U port of the proportional multi-way valve (18) is connected to the pressure relief valve (28), the T port is connected to the oil tank, and the LS port is connected to the X port of the variable pump (1).

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