Rock-entering hydraulic system of holding-up hammer drilling machine and control method of rock-entering hydraulic system

Abstract

The invention discloses a holding-up hammer drilling machine rock-entering hydraulic system and a control method thereof, and belongs to the technical field of engineering machine.The holding-up hammer drilling machine rock-entering hydraulic system comprises an oil tank, an action part, a power source, a reversing valve set, a sensor set, a pressure adjusting oil way and a controller; the impact pressure value and the propelling pressure value in the pressure adjusting oil way are monitored in real time through the sensor set, and the impact pressure in the pressure adjusting oil way is dynamically adjusted through the impact force adjusting oil way formed by connecting the first pressure valve set and the reversing valve set. The propelling pressure in the pressure adjusting oil way is dynamically adjusted through the propelling force adjusting oil way formed by connecting the second pressure valve set and the reversing valve set, the service life of equipment is prolonged while the drilling efficiency is improved, and the problem that an existing hydraulic system cannot adjust the impact pressure in the operation process according to the actual working condition is solved.

Description

Technical Field

[0001] The present invention relates to a hydraulic system for a top hammer drill for rock penetration and a control method thereof, belonging to the technical field of construction machinery. Background Art

[0002] When a top hammer drill is operating, it is necessary to drive the drill bit to break the rock layer through impact pressure. Using an appropriate impact pressure for rock penetration is particularly important for the entire construction process. Most existing hydraulic systems use a fixed impact pressure or manual experience to operate the machine for rock penetration. An impact pressure that does not match the actual operating environment will cause energy waste and unstable drilling quality, lack of dynamic feedback on the real-time working conditions, and thus lead to low efficiency, serious wear of the drill bit, and even cause equipment overload failures. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a hydraulic system for a top hammer drill for rock penetration and a control method thereof, which can dynamically adjust the impact pressure for rock penetration in real time, extend the equipment life while improving the drilling efficiency, and solve the problem that the current hydraulic system cannot adjust the impact pressure during the operation process according to the actual working conditions.

[0004] To solve the above technical problems, the present invention is implemented by the following technical solutions: On the one hand, the present invention provides a hydraulic system for a top hammer drill for rock penetration, including: An oil tank; An operating part for performing rock drilling, rotation, and propulsion actions; A power source connected to the oil tank for providing the impact power, rotation power, and propulsion power required for rock penetration operations; A directional valve group connected to the operating part and the power source respectively for switching the direction of the pressure oil; A sensor group connected to the directional valve group for monitoring the corresponding impact pressure value, rotation pressure value, and propulsion pressure value during the rock penetration operation; A pressure adjustment oil circuit including a first pressure valve group and a second pressure valve group; wherein, the first pressure valve group is connected to the directional valve group to form an impact force adjustment oil circuit; the second pressure valve group is connected to the directional valve group to form a propulsion force adjustment oil circuit; A controller electrically connected to the sensor group, the first pressure valve group, the second pressure valve group, the directional valve group, and the power source respectively.

[0005] Optionally, the directional valve group includes an impact main valve, a rotation main valve, and a slow feed valve; The impact main valve is connected to the operating part and the power source respectively, and the impact main valve is provided with a first monitoring port; the sensor group is connected to the first monitoring port to monitor the impact pressure value; The swing main valve is respectively connected to the actuating part and the power source, and the swing main valve is provided with a second monitoring port; the sensor group is connected to the second monitoring port to monitor the swing pressure value; The slow feed valve is respectively connected to the actuating part and the power source, and the slow feed valve is provided with a third monitoring port; the sensor group is connected to the third monitoring port to monitor the propulsion pressure value.

[0006] Optionally, the first pressure valve group includes a pressure reversing valve group A for switching the flow direction of the pressure oil in the impact force adjustment oil circuit and an overflow valve group A for adjusting the flow rate of the pressure oil in the impact force adjustment oil circuit.

[0007] Optionally, the pressure reversing valve group A includes a first solenoid valve A and a second solenoid valve A; the overflow valve group A includes a first impact pressure overflow valve, a second impact pressure overflow valve and a third impact pressure overflow valve; The first solenoid valve A is respectively connected to the first monitoring port and the second solenoid valve A; The first impact pressure overflow valve is connected to the second solenoid valve A; The second impact pressure overflow valve is connected to the first solenoid valve A; The third impact pressure overflow valve is connected to the first solenoid valve A, the second solenoid valve A and the second impact pressure overflow valve; The first impact pressure overflow valve, the second impact pressure overflow valve and the third impact pressure overflow valve are all connected to the fuel tank; Wherein, the pressure relief values of the first impact pressure overflow valve, the second impact pressure overflow valve and the third impact pressure overflow valve are different.

[0008] Optionally, the pressure relief value of the first impact pressure overflow valve < the pressure relief value of the third impact pressure overflow valve < the pressure relief value of the second impact pressure overflow valve.

[0009] Optionally, the second pressure valve group includes a pressure reversing valve group B for switching the flow direction of the pressure oil in the propulsion force adjustment oil circuit and an overflow valve group B for adjusting the flow rate of the pressure oil in the propulsion force adjustment oil circuit.

[0010] Optionally, the pressure reversing valve group B includes a first solenoid valve B, a second solenoid valve B, a third solenoid valve B and a fourth solenoid valve B; the overflow valve group B includes a first propulsion pressure overflow valve, a second propulsion pressure overflow valve, a third propulsion pressure overflow valve, a fourth propulsion pressure overflow valve and a fifth propulsion pressure overflow valve; The first solenoid valve B, the second solenoid valve B and the third solenoid valve B are all connected to the third monitoring port; The first solenoid valve B is connected to the first propulsion pressure overflow valve; The second solenoid valve B is connected to the second propulsion pressure overflow valve; The third solenoid valve B is respectively connected to the fourth solenoid valve B and the fourth propulsion pressure relief valve; The fourth solenoid valve B is connected to the fifth propulsion pressure relief valve; The third propulsion pressure relief valve is connected to the third solenoid valve B and the fourth propulsion pressure relief valve; The first propulsion pressure relief valve, the second propulsion pressure relief valve, the third propulsion pressure relief valve, the fourth propulsion pressure relief valve and the fifth propulsion pressure relief valve are all connected to the fuel tank; Among them, the pressure relief values of the first propulsion pressure relief valve, the second propulsion pressure relief valve, the third propulsion pressure relief valve, the fourth propulsion pressure relief valve and the fifth propulsion pressure relief valve are different.

[0011] Optionally, the pressure relief value of the first propulsion pressure relief valve < the pressure relief value of the second propulsion pressure relief valve < the pressure relief value of the fifth propulsion pressure relief valve < the pressure relief value of the third propulsion pressure relief valve < the pressure relief value of the fourth propulsion pressure relief valve.

[0012] The present invention also provides a control method for the hydraulic system of a down-the-hole drill for rock penetration. The method is based on the hydraulic system of the down-the-hole drill for rock penetration as described above, and the method includes: When the drill is drilling, both the first solenoid valve A and the second solenoid valve A are energized; Obtain the impact pressure value and the rotary pressure value; If both the impact pressure value and the rotary pressure value increase, and the rotary pressure value meets the preset threshold, the second solenoid valve A is de-energized.

[0013] Furthermore, the method further includes: When the drill is drilling, both the third solenoid valve B and the fourth solenoid valve B are energized; Obtain the propulsion pressure value; If the propulsion pressure value increases and meets the preset threshold, the fourth solenoid valve B is de-energized.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention uses the sensor group to real-time monitor the impact pressure value and the propulsion pressure value in the pressure adjustment oil circuit. The impact force adjustment oil circuit formed by connecting the first pressure valve group and the directional valve group is used to dynamically adjust the impact pressure in the pressure adjustment oil circuit. The propulsion force adjustment oil circuit formed by connecting the second pressure valve group and the directional valve group is used to dynamically adjust the propulsion pressure in the pressure adjustment oil circuit. While improving the drilling efficiency, the equipment life is extended, and the problem that the current hydraulic system cannot adjust the impact pressure during the operation according to the actual working conditions is solved.

[0015] 2. The present invention cooperates with the pressure reversing valve group A and the overflow valve group A to dynamically adjust the impact pressure whose pressure value is between the pressure relief value of the first impact pressure overflow valve and the pressure relief value of the second impact pressure overflow valve.

[0016] 3. The present invention cooperates with the pressure reversing valve group B and the overflow valve group B to dynamically adjust the propulsion pressure whose pressure value is between the pressure relief value of the first propulsion pressure overflow valve and the pressure relief value of the fourth propulsion pressure overflow valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of a hydraulic system for a top hammer drill to enter rock provided in Embodiment 1 of the present invention; Figure 2 FIG. is a schematic structural diagram of a hydraulic system for a top hammer drill to enter rock provided in Embodiment 2 of the present invention; Figure 3 is Figure 1 、 Figure 2 an enlarged view of the G position in Figure 4 FIG. is a flowchart of impact pressure relief of a control method for a hydraulic system for a top hammer drill to enter rock provided in an embodiment of the present invention; Figure 5 FIG. is a flowchart of propulsion pressure relief of a control method for a hydraulic system for a top hammer drill to enter rock provided in an embodiment of the present invention.

[0018] In the figure: 1, fuel tank; 201, rock drill; 2011, oil return port; 2012, drain port; 2013, impact inlet port; 2014, first slewing inlet port; 2015, second slewing inlet port; 202, propulsion cylinder; 2021, first propulsion oil port; 2022, second propulsion oil port; 203, balance valve; 2031, inlet port V1; 2032, inlet port V2; 2033, outlet port D1; 2034, outlet port D2; 301, engine; 302, impact main pump; 3021, outlet port P1; 3022, signal interface X1; 303, slewing main pump; 3031, outlet port P2; 3032, signal interface X2; 304, gear pump; 3041, outlet port P3; 401, impact main valve; 4011, outlet port A1; 4012, outlet port A2; 4013, outlet port A3; 4014, first monitoring port; 4015, signal interface X1'; 4016, impact oil return port; 402, slewing main valve; 4021, outlet port B1; 4022, outlet port B2; 4023, signal interface X2'; 4024, slewing oil return port; 403, slow feed valve; 4031, outlet port C1; 4032, outlet port C2; 4033, third monitoring port; 4034, slow feed oil return port; 501, first pressure sensor; 502, second pressure sensor; 503, third pressure sensor; 6011, first solenoid valve A; 6012, second solenoid valve A; 6021, first impact pressure relief valve; 6022, second impact pressure relief valve; 6023, third impact pressure relief valve; 7011, first solenoid valve B; 7012, second solenoid valve B; 7013, third solenoid valve B; 7014, fourth solenoid valve B; 7021, first propulsion pressure relief valve; 7022, second propulsion pressure relief valve; 7023, third propulsion pressure relief valve; 7024, fourth propulsion pressure relief valve; 7025, fifth propulsion pressure relief valve; 8, high-pressure filter. Detailed implementation manners

[0019] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0022] As Figure 1 shown, a hydraulic system for a button bit drill to penetrate rock includes: an oil tank 1, an operation part, a power source, a reversing valve group, a sensor group, a pressure adjustment oil circuit, and a controller; The power source is connected to the oil tank 1, and hydraulic oil is added to the oil tank 1; In this embodiment, the power source includes an engine 301, an impact main pump 302 for providing impact power, a rotary main pump 303 for providing rotary power, and a gear pump 304 for providing propulsion power. The impact main pump 302, the rotary main pump 303, and the gear pump 304 are all connected to the power output end of the engine 301 through transmission parts; The engine 301, the impact main pump 302, the rotary main pump 303, and the gear pump 304 are all electrically connected to the controller; The operation part includes a rock drill 201, a propulsion cylinder 202, and a balance valve 203; the reversing valve group includes an impact main valve 401, a rotary main valve 402, and a slow feed valve 403. Specifically: The impact main pump 302 is provided with an oil inlet and an oil outlet P13021; The rotary main pump 303 is provided with an oil inlet and an oil outlet P23031; The gear pump 304 is provided with an oil inlet and an oil outlet P33041; The impact main valve 401 is provided with an oil inlet, an oil outlet A14011, an oil outlet A24012, and an oil outlet A34013; The rotary main valve 402 is provided with an oil inlet, an oil outlet B14021, and an oil outlet B24022; The slow feed valve 403 is provided with an oil inlet, an oil outlet C14031, and an oil outlet C24032; The rock drill 201 is provided with an oil return port 2011, an oil drain port 2012, an impact oil inlet 2013, a first rotary oil inlet 2014, and a second rotary oil inlet 2015; The balance valve 203 is provided with an oil inlet V12031, an oil inlet V22032, an oil outlet D12033, and an oil outlet D22034; The propulsion cylinder 202 is provided with a first propulsion oil port 2021 and a second propulsion oil port 2022.

[0023] Among them, the inlet of the impact main pump 302 is connected to the fuel tank 1; The outlet P13021 is connected to the high-pressure filter 8, and the high-pressure filter 8 is connected to the inlet of the impact main valve 401; The outlet A14011 is connected to the impact inlet 2013 of the rock drill 201, and the oil return port 2011 and the oil drain port 2012 of the rock drill 201 are both connected to the fuel tank 1; The outlet A24012 is connected to the inlet V12031, the outlet A34013 is connected to the inlet V22032, the outlet D12033 is connected to the first propulsion oil port 2021, and the outlet D22034 is connected to the second propulsion oil port 2022.

[0024] The inlet of the rotation main pump 303 is connected to the fuel tank 1; The outlet P23031 is connected to the inlet of the rotation main valve 402, the outlet B14021 is connected to the first rotation inlet 2014, and the outlet B24022 is connected to the second rotation inlet 2015.

[0025] The inlet of the gear pump 304 is connected to the fuel tank 1; The outlet P33041 is connected to the inlet of the slow feed valve 403, the outlet C14031 is connected to the inlet V12031, and the outlet C14031 is connected to the inlet V22032.

[0026] The balance valve 203, the impact main valve 401, the rotation main valve 402, and the slow feed valve 403 are all electrically connected to the controller.

[0027] The sensor group includes a first pressure sensor 501, a second pressure sensor 502, and a third pressure sensor 503; Among them, the first pressure sensor 501 is used to monitor the impact pressure value, the second pressure sensor 502 is used to monitor the rotation pressure value, and the third pressure sensor 503 is used to monitor the propulsion pressure value. Specifically: The impact main valve 401 is also provided with a first monitoring port 4014, and the first monitoring port 4014 is connected to the first pressure sensor 501; The outlet B14021 of the rotation main valve 402 is used as the second monitoring port, and the outlet B14021 is connected to the second pressure sensor 502; The slow feed valve 403 is also provided with a third monitoring port 4033, and the third monitoring port 4033 is connected to the third pressure sensor 503; The first pressure sensor 501, the second pressure sensor 502, and the third pressure sensor 503 are all electrically connected to the controller.

[0028] The pressure adjustment oil circuit includes a first pressure valve group and a second pressure valve group; The first pressure valve group is connected to the reversing valve group to form an impact force adjustment oil circuit. Specifically: As Figure 3 shown, the pressure reversing valve group A includes a first solenoid valve A6011 and a second solenoid valve A6012; among them, the overflow valve group A includes a first impact pressure overflow valve 6021, a second impact pressure overflow valve 6022, and a third impact pressure overflow valve 6023; The first solenoid valve A6011 is respectively connected to the first monitoring port 4014 and the second solenoid valve A6012; The first impact pressure overflow valve 6021 is connected to the second solenoid valve A6012; The second impact pressure overflow valve 6022 is connected to the first solenoid valve A6011; The third impact pressure overflow valve 6023 is connected to the first solenoid valve A6011, the second solenoid valve A6012, and the second impact pressure overflow valve 6022; The first impact pressure overflow valve 6021, the second impact pressure overflow valve 6022, and the third impact pressure overflow valve 6023 are all connected to the fuel tank 1; The first solenoid valve A6011, the second solenoid valve A6012, the first impact pressure overflow valve 6021, the second impact pressure overflow valve 6022, and the third impact pressure overflow valve 6023 are all electrically connected to the controller; The pressure relief value of the first impact pressure overflow valve 6021 < the pressure relief value of the third impact pressure overflow valve 6023 < the pressure relief value of the second impact pressure overflow valve 6022. Through the cooperation of the pressure reversing valve group A and the overflow valve group A, the impact pressure with a pressure value between the pressure relief value of the first impact pressure overflow valve 6021 and the pressure relief value of the second impact pressure overflow valve 6022 is dynamically adjusted, so that the impact pressure of the rock drill 201 is in a continuously changing process, thereby eliminating the damage caused by the instantaneous switching of the impact pressure to the rock drill 201.

[0029] The second pressure valve group is connected to the reversing valve group to form a propulsion force adjustment oil circuit. Specifically: The second pressure valve group includes a pressure reversing valve group B for switching the flow direction of the pressure oil in the propulsion force adjustment oil circuit and an overflow valve group B for adjusting the flow rate of the pressure oil in the propulsion force adjustment oil circuit; among them, the pressure reversing valve group B includes a first solenoid valve B7011, a second solenoid valve B7012, a third solenoid valve B7013, and a fourth solenoid valve B7014; the overflow valve group B includes a first propulsion pressure overflow valve 7021, a second propulsion pressure overflow valve 7022, a third propulsion pressure overflow valve 7023, a fourth propulsion pressure overflow valve 7024, and a fifth propulsion pressure overflow valve 7025; The first solenoid valve B7011, the second solenoid valve B7012, and the third solenoid valve B7013 are all connected to the third monitoring port 4033; The first solenoid valve B7011 is connected to the first propulsion pressure relief valve 7021; The second solenoid valve B7012 is connected to the second propulsion pressure relief valve 7022; The third solenoid valve B7013 is respectively connected to the fourth solenoid valve B7014 and the fourth propulsion pressure relief valve 7024; The fourth solenoid valve B7014 is connected to the fifth propulsion pressure relief valve 7025; The third propulsion pressure relief valve 7023 is connected to the third solenoid valve B7013 and the fourth propulsion pressure relief valve 7024; The first propulsion pressure relief valve 7021, the second propulsion pressure relief valve 7022, the third propulsion pressure relief valve 7023, the fourth propulsion pressure relief valve 7024, and the fifth propulsion pressure relief valve 7025 are all connected to the fuel tank 1; The first solenoid valve B7011, the second solenoid valve B7012, the third solenoid valve B7013, the first propulsion pressure relief valve 7021, the second propulsion pressure relief valve 7022, the third propulsion pressure relief valve 7023, the fourth propulsion pressure relief valve 7024, and the fifth propulsion pressure relief valve 7025 are all electrically connected to the controller; The pressure relief value of the first propulsion pressure relief valve 7021 < the pressure relief value of the second propulsion pressure relief valve 7022 < the pressure relief value of the fifth propulsion pressure relief valve 7025 < the pressure relief value of the third propulsion pressure relief valve 7023 < the pressure relief value of the fourth propulsion pressure relief valve 7024. Through the cooperation of the pressure reversing valve group B and the relief valve group B, the propulsion pressure with a value between the pressure relief value of the first propulsion pressure relief valve 7021 and the pressure relief value of the fourth propulsion pressure relief valve 7024 is dynamically adjusted.

[0030] The impact main valve 401 is also provided with an impact oil return port 4016, and the impact oil return port 4016 is connected to the fuel tank 1; The swing main valve 402 is also provided with a swing oil return port 4024, and the swing oil return port 4024 is connected to the fuel tank 1; The slow feed valve 403 is also provided with a slow feed oil return port 4034, and the slow feed oil return port 4034 is connected to the fuel tank 1. [[ID=2H]]

[0031] It should be noted that the drill needs to perform rod connection and rod disconnection operations before and after operation; During rod connection, the second solenoid valve B7012 is energized, the propulsion pressure is monitored by the third pressure sensor 503, and the rod connection propulsion pressure is restricted through the oil circuit connected by the oil outlet B14021, the second solenoid valve B7012, and the second propulsion pressure relief valve 7022; When the rod is disassembled, the second solenoid valve A6012 is energized, and the propulsion pressure is monitored by the third pressure sensor 503. The rod-disassembling propulsion pressure is restricted by the oil circuit connected through the oil outlet B14021, the second solenoid valve A6012, and the first propulsion pressure overflow valve 7021.

[0032] Embodiment 2 As Figure 2 shown, a hydraulic system for a top hammer drill entering rock includes: an oil tank 1, an operation part, a power source, a reversing valve group, a sensor group, a pressure adjustment oil circuit, and a controller; The power source is connected to the oil tank 1, and hydraulic oil is added to the oil tank 1; In this embodiment, the power source includes an engine 301, an impact main pump 302 for providing impact power, a rotary main pump 303 for providing rotary power, and a gear pump 304 for providing propulsion power. The impact main pump 302, the rotary main pump 303, and the gear pump 304 are all connected to the power output end of the engine 301 through transmission parts; The engine 301, the impact main pump 302, the rotary main pump 303, and the gear pump 304 are all electrically connected to the controller; The operation part includes a rock drill 201, a propulsion cylinder 202, and a balance valve 203; the reversing valve group includes an impact main valve 401, a rotary main valve 402, and a slow feed valve 403. Specifically: The impact main pump 302 is provided with an oil inlet and an oil outlet P13021; The rotary main pump 303 is provided with an oil inlet and an oil outlet P23031; The gear pump 304 is provided with an oil inlet and an oil outlet P33041; The impact main valve 401 is provided with an oil inlet, an oil outlet A14011, an oil outlet A24012, and an oil outlet A34013; The rotary main valve 402 is provided with an oil inlet, an oil outlet B14021, and an oil outlet B24022; The slow feed valve 403 is provided with an oil inlet, an oil outlet C14031, and an oil outlet C24032; The rock drill 201 is provided with an oil return port 2011, an oil drain port 2012, an impact oil inlet 2013, a first rotary oil inlet 2014, and a second rotary oil inlet 2015; The balance valve 203 is provided with an oil inlet V12031, an oil inlet V22032, an oil outlet D12033, and an oil outlet D22034; The propulsion cylinder 202 is provided with a first propulsion oil port 2021 and a second propulsion oil port 2022.

[0033] Among them, the oil inlet of the impact main pump 302 is connected to the oil tank 1; The oil outlet P13021 is connected to a high-pressure filter 8, and the high-pressure filter 8 is connected to the oil inlet of the impact main valve 401; The oil outlet A14011 is connected to the impact oil inlet 2013 of the rock drill 201, and the oil return port 2011 and the oil drain port 2012 of the rock drill 201 are both connected to the fuel tank 1; The oil outlet A24012 is connected to the oil inlet V12031, the oil outlet A34013 is connected to the oil inlet V22032, the oil outlet D12033 is connected to the first propulsion oil inlet 2021, and the oil outlet D22034 is connected to the second propulsion oil inlet 2022.

[0034] The oil inlet of the swing main pump 303 is connected to the fuel tank 1; The oil outlet P23031 is connected to the oil inlet of the swing main valve 402, the oil outlet B14021 is connected to the first swing oil inlet 2014, and the oil outlet B24022 is connected to the second swing oil inlet 2015.

[0035] The oil inlet of the gear pump 304 is connected to the fuel tank 1; The oil outlet P33041 is connected to the oil inlet of the slow feed valve 403, the oil outlet C14031 is connected to the oil inlet V12031, and the oil outlet C14031 is connected to the oil inlet V22032.

[0036] The balance valve 203, the impact main valve 401, the swing main valve 402, and the slow feed valve 403 are all electrically connected to the controller.

[0037] The sensor group includes a first pressure sensor 501, a second pressure sensor 502, and a third pressure sensor 503; Among them, the first pressure sensor 501 is used to monitor the impact pressure value, the second pressure sensor 502 is used to monitor the swing pressure value, and the third pressure sensor 503 is used to monitor the propulsion pressure value. Specifically: The impact main valve 401 is also provided with a first monitoring port 4014, and the first monitoring port 4014 is connected to the first pressure sensor 501; The oil outlet B14021 of the swing main valve 402 is used as the second monitoring port, and the oil outlet B14021 is connected to the second pressure sensor 502; The slow feed valve 403 is also provided with a third monitoring port 4033, and the third monitoring port 4033 is connected to the third pressure sensor 503; The first pressure sensor 501, the second pressure sensor 502, and the third pressure sensor 503 are all electrically connected to the controller.

[0038] The pressure adjustment oil circuit includes a first pressure valve group and a second pressure valve group; The first pressure valve group is connected to the reversing valve group to form an impact force adjustment oil circuit. Specifically: As Figure 3 shown, the first pressure valve group includes a pressure reversing valve group A and an overflow valve group A; The pressure reversing valve group A includes a first solenoid valve A6011 and a second solenoid valve A6012; among them, the overflow valve group A includes a first impact pressure overflow valve 6021, a second impact pressure overflow valve 6022, and a third impact pressure overflow valve 6023; The first solenoid valve A6011 is respectively connected to the first monitoring port 4014 and the second solenoid valve A6012; The first impact pressure overflow valve 6021 is connected to the second solenoid valve A6012; The second impact pressure overflow valve 6022 is connected to the first solenoid valve A6011; The third impact pressure overflow valve 6023 is connected to the first solenoid valve A6011, the second solenoid valve A6012, and the second impact pressure overflow valve 6022; The first impact pressure overflow valve 6021, the second impact pressure overflow valve 6022, and the third impact pressure overflow valve 6023 are all connected to the fuel tank 1; The first solenoid valve A6011, the second solenoid valve A6012, the first impact pressure overflow valve 6021, the second impact pressure overflow valve 6022, and the third impact pressure overflow valve 6023 are all electrically connected to the controller; The pressure relief value of the first impact pressure overflow valve 6021 < the pressure relief value of the third impact pressure overflow valve 6023 < the pressure relief value of the second impact pressure overflow valve 6022. Through the cooperation of the pressure reversing valve group A and the overflow valve group A, the impact pressure with a pressure value between the pressure relief value of the first impact pressure overflow valve 6021 and the pressure relief value of the second impact pressure overflow valve 6022 is dynamically adjusted, so that the impact pressure of the rock drill 201 is in a continuously changing process, thereby eliminating the damage caused by the instantaneous switching of the impact pressure to the rock drill 201.

[0039] The second pressure valve group is connected to the reversing valve group to form a propulsion force adjustment oil circuit. Specifically: The second pressure valve group includes a pressure reversing valve group B and an overflow valve group B; The pressure reversing valve group B includes a first solenoid valve B7011, a second solenoid valve B7012, a third solenoid valve B7013, and a fourth solenoid valve B7014; among them, the overflow valve group B includes a first propulsion pressure overflow valve 7021, a second propulsion pressure overflow valve 7022, a third propulsion pressure overflow valve 7023, a fourth propulsion pressure overflow valve 7024, and a fifth propulsion pressure overflow valve 7025; The first solenoid valve B7011, the second solenoid valve B7012, and the third solenoid valve B7013 are all connected to the third monitoring port 4033; The first solenoid valve B7011 is connected to the first propulsion pressure overflow valve 7021; The second solenoid valve B7012 is connected to the second propulsion pressure overflow valve 7022; The third solenoid valve B7013 is respectively connected to the fourth solenoid valve B7014 and the fourth propulsion pressure overflow valve 7024; The fourth solenoid valve B7014 is connected to the fifth propulsion pressure overflow valve 7025; The third propulsion pressure overflow valve 7023 is connected to the third solenoid valve B7013 and the fourth propulsion pressure overflow valve 7024; The first propulsion pressure overflow valve 7021, the second propulsion pressure overflow valve 7022, the third propulsion pressure overflow valve 7023, the fourth propulsion pressure overflow valve 7024 and the fifth propulsion pressure overflow valve 7025 are all connected to the fuel tank 1; The first solenoid valve B7011, the second solenoid valve B7012, the third solenoid valve B7013, the first propulsion pressure overflow valve 7021, the second propulsion pressure overflow valve 7022, the third propulsion pressure overflow valve 7023, the fourth propulsion pressure overflow valve 7024 and the fifth propulsion pressure overflow valve 7025 are all electrically connected to the controller; The pressure relief value of the first propulsion pressure overflow valve 7021 < the pressure relief value of the second propulsion pressure overflow valve 7022 < the pressure relief value of the fifth propulsion pressure overflow valve 7025 < the pressure relief value of the third propulsion pressure overflow valve 7023 < the pressure relief value of the fourth propulsion pressure overflow valve 7024. Through the cooperation of the pressure reversing valve group B and the overflow valve group B, the propulsion pressure with a pressure value between the pressure relief value of the first propulsion pressure overflow valve 7021 and the pressure relief value of the fourth propulsion pressure overflow valve 7024 is dynamically adjusted.

[0040] The shock main valve 401 is also provided with a shock oil return port 4016, and the shock oil return port 4016 is connected to the fuel tank 1; The swing main valve 402 is also provided with a swing oil return port 4024, and the swing oil return port 4024 is connected to the fuel tank 1; The slow feed valve 403 is also provided with a slow feed oil return port 4034, and the slow feed oil return port 4034 is connected to the fuel tank 1.

[0041] The impact main pump 302 is also provided with a signal interface X13022, and the impact main valve 401 is also provided with a signal interface X1'4015. The signal interface X13022 is electrically connected to the signal interface X1'4015. The hydraulic oil enters from the inlet port of the impact main pump 302 and enters the impact main valve 401 from the outlet port P13021 through the high-pressure filter from the inlet port of the impact main valve 401. The pressure oil enters the rock drill 201 from the outlet port A14011 of the impact main valve 401 through the impact inlet port 2013 of the rock drill 201 and drives the rock drill 201 to operate. The signal interface X13022 is used to receive the pressure feedback signal for the displacement adjustment of the impact main pump 302.

[0042] The rotation main pump 303 is also provided with a signal interface X23032, and the rotation main valve 402 is also provided with a signal interface X2'4023. The signal interface X23032 is electrically connected to the signal interface X2'4023. The hydraulic oil enters from the inlet port of the rotation main pump 303 and enters the rotation main valve 402 from the outlet port P23031 from the inlet port of the rotation main valve 402. The pressure oil enters the rock drill 201 from the outlet ports B14021 and B24022 through the first rotation inlet port 2014 and the second rotation inlet port 2015 and drives the rock drill 201 to operate. The signal interface X23032 is used to receive the pressure feedback signal for the displacement adjustment of the rotation main pump 303.

[0043] The hydraulic oil enters from the inlet port of the impact main pump 302 and enters the impact main valve 401 from the outlet port P13021 through the high-pressure filter from the inlet port of the impact main valve 401. The pressure oil enters the balance valve 203 from the outlet ports A24012 and A34013 of the impact main valve 401 through the inlet ports V12031 and V22032. The hydraulic oil enters from the inlet port of the gear pump 304 and enters the slow feed valve 403 from the outlet port P33041 from the inlet port of the slow feed valve 403. The pressure oil enters the balance valve 203 from the outlet ports C14031 and C24032 of the slow feed valve 403 through the inlet ports V12031 and V22032. The pressure oil in the balance valve 203 finally enters the propulsion cylinder 202 from the outlet ports D12033 and D22034 through the first propulsion oil port 2021 and the second propulsion oil port 2022.

[0044] It should be noted that the drill needs to perform rod connection and disconnection operations before and after operation. During rod connection, the second solenoid valve B7012 is energized, the propulsion pressure is monitored by the third pressure sensor 503, and the rod connection propulsion pressure is restricted through the oil circuit connected by the outlet port B14021, the second solenoid valve B7012 and the second propulsion pressure relief valve 7022. When removing the rod, the second solenoid valve A6012 is energized, and the propulsion pressure is monitored by the third pressure sensor 503. The rod-removing propulsion pressure is restricted by the oil circuit connected through the oil outlet B14021, the second solenoid valve A6012, and the first propulsion pressure overflow valve 7021.

[0045] Embodiment 3 As Figure 4 shown, a control method for the hydraulic system of a button bit drill for rock penetration includes: When the drill is drilling, both the first solenoid valve A6011 and the second solenoid valve A6012 are energized, and at this time, pressure relief is carried out through the first impact pressure overflow valve 6021; Obtain the impact pressure value monitored by the first pressure sensor 501 and the rotary pressure value monitored by the second pressure sensor 502; As the impact bit gradually penetrates, both the impact pressure value and the rotary pressure value increase; If the rotary pressure value meets the preset threshold, the second solenoid valve A6012 is de-energized, and the impact pressure is relieved by the third impact pressure overflow valve 6023; When the impact pressure still continues to increase, the impact pressure is finally relieved by the third impact pressure overflow valve 6023 and the second impact pressure overflow valve 6022, and the impact pressure value tends to be stable; As Figure 5 shown, both the third solenoid valve B7013 and the fourth solenoid valve B7014 are energized, and at this time, pressure relief is carried out through the fifth propulsion pressure overflow valve 7025; Obtain the propulsion pressure value monitored by the third pressure sensor 503; If the propulsion pressure value still rises and meets the preset threshold, the fourth solenoid valve B7014 is de-energized, and the propulsion pressure is relieved by the third propulsion pressure overflow valve 7023 and the fourth propulsion pressure overflow valve 7024.

[0046] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A hydraulic system for a button drill to penetrate rock, characterized in that, Comprising: Fuel tank (1); An operating part for performing rock drilling, rotation and propulsion operations; A power source connected to the fuel tank (1) for providing the impact power, rotation power and propulsion power required for rock entry operations; A directional valve group respectively connected to the operating part and the power source for switching the direction of the pressure oil; A sensor group connected to the directional valve group for monitoring the corresponding impact pressure value, rotation pressure value and propulsion pressure value during the rock entry operation; A pressure adjustment oil circuit including a first pressure valve group and a second pressure valve group; wherein, the first pressure valve group is connected to the directional valve group to form an impact force adjustment oil circuit; the second pressure valve group is connected to the directional valve group to form a propulsion force adjustment oil circuit; A controller electrically connected to the sensor group, the first pressure valve group, the second pressure valve group, the directional valve group and the power source respectively.

2. The hydraulic system for a button drill to penetrate rock according to claim 1, characterized in that, The directional valve group includes an impact main valve (401), a rotation main valve (402) and a slow feed valve (403); The impact main valve (401) is respectively connected to the operating part and the power source, and the impact main valve (401) is provided with a first monitoring port (4014); the sensor group is connected to the first monitoring port (4014) to monitor the impact pressure value; The rotation main valve (402) is respectively connected to the operating part and the power source, and the rotation main valve (402) is provided with a second monitoring port; the sensor group is connected to the second monitoring port to monitor the rotation pressure value; The slow feed valve (403) is respectively connected to the operating part and the power source, and the slow feed valve (403) is provided with a third monitoring port (4033); the sensor group is connected to the third monitoring port (4033) to monitor the propulsion pressure value.

3. The hydraulic system for a button drill to penetrate rock according to claim 2, characterized in that, The first pressure valve group includes a pressure directional valve group A for switching the flow direction of the pressure oil in the impact force adjustment oil circuit and an overflow valve group A for adjusting the flow rate of the pressure oil in the impact force adjustment oil circuit.

4. The hydraulic system for a button drill to penetrate rock according to claim 3, characterized in that, The pressure directional valve group A includes a first solenoid valve A (6011) and a second solenoid valve A (6012); the overflow valve group A includes a first impact pressure overflow valve (6021), a second impact pressure overflow valve (6022) and a third impact pressure overflow valve (6023); The first solenoid valve A (6011) is respectively connected to the first monitoring port (4014) and the second solenoid valve A (6012); The first impact pressure overflow valve (6021) is connected to the second solenoid valve A (6012); The second impact pressure overflow valve (6022) is connected to the first solenoid valve A (6011); The third impact pressure overflow valve (6023) is connected to the first solenoid valve A (6011), the second solenoid valve A (6012) and the second impact pressure overflow valve (6022); The first impact pressure overflow valve (6021), the second impact pressure overflow valve (6022) and the third impact pressure overflow valve (6023) are all connected to the fuel tank (1); Wherein, the pressure relief values of the first impact pressure overflow valve (6021), the second impact pressure overflow valve (6022) and the third impact pressure overflow valve (6023) are different.

5. The hydraulic system for a button drill to penetrate rock according to claim 4, characterized in that, The pressure relief value of the first impact pressure relief valve (6021) < the pressure relief value of the third impact pressure relief valve (6023) < the pressure relief value of the second impact pressure relief valve (6022).

6. The hydraulic system for a button drill to penetrate rock according to claim 2, wherein, The second pressure valve group includes a pressure reversing valve group B for switching the flow direction of the pressure oil in the propulsion force adjustment oil circuit and a relief valve group B for adjusting the flow rate of the pressure oil in the propulsion force adjustment oil circuit.

7. The hydraulic system for a button drill to penetrate rock according to claim 6, characterized in that, The pressure reversing valve group B includes a first solenoid valve B (7011), a second solenoid valve B (7012), a third solenoid valve B (7013), and a fourth solenoid valve B (7014); the relief valve group B includes a first propulsion pressure relief valve (7021), a second propulsion pressure relief valve (7022), a third propulsion pressure relief valve (7023), a fourth propulsion pressure relief valve (7024), and a fifth propulsion pressure relief valve (7025); The first solenoid valve B (7011), the second solenoid valve B (7012), and the third solenoid valve B (7013) are all connected to the third monitoring port (4033); The first solenoid valve B (7011) is connected to the first propulsion pressure relief valve (7021); The second solenoid valve B (7012) is connected to the second propulsion pressure relief valve; The third solenoid valve B (7013) is respectively connected to the fourth solenoid valve B (7014) and the fourth propulsion pressure relief valve (7024); The fourth solenoid valve B (7014) is connected to the fifth propulsion pressure relief valve (7025); The third propulsion pressure relief valve (7023) is connected to the third solenoid valve B (7013) and the fourth propulsion pressure relief valve (7024); The first propulsion pressure relief valve (7021), the second propulsion pressure relief valve (7022), the third propulsion pressure relief valve (7023), the fourth propulsion pressure relief valve (7024), and the fifth propulsion pressure relief valve (7025) are all connected to the fuel tank (1); Among them, the pressure relief values of the first propulsion pressure relief valve (7021), the second propulsion pressure relief valve (7022), the third propulsion pressure relief valve (7023), the fourth propulsion pressure relief valve (7024), and the fifth propulsion pressure relief valve (7025) are different.

8. The hydraulic system for the button drill to penetrate rock according to claim 7, characterized in that The pressure relief value of the first propulsion pressure relief valve (7021) < the pressure relief value of the second propulsion pressure relief valve (7022) < the pressure relief value of the fifth propulsion pressure relief valve (7025) < the pressure relief value of the third propulsion pressure relief valve (7023) < the pressure relief value of the fourth propulsion pressure relief valve (7024).

9. A control method for the hydraulic system of a button bit drill for rock penetration, characterized in that, The method is based on the down-the-hole drill rock-in hydraulic system according to any one of claims 1 to 8, and the method includes: When the drill is drilling, both the first solenoid valve A and the second solenoid valve A are energized; Obtain the impact pressure value and the rotary pressure value; If both the impact pressure value and the rotary pressure value increase, and the rotary pressure value meets the preset threshold, then the second solenoid valve A is de-energized.

10. The control method of the hydraulic system for a button bit drill to penetrate rock according to claim 9, wherein The method further includes: When the drill is drilling, both the third solenoid valve B and the fourth solenoid valve B are energized; Obtain the propulsion pressure value; If the propulsion pressure value increases and meets the preset threshold, then the fourth solenoid valve B is de-energized.

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