A top hammer drill rig into rock hydraulic system

Abstract

This utility model discloses a hydraulic system for rock entry in a top hammer drill, belonging to the field of engineering machinery technology. It includes an oil tank, an actuator, a power source, a reversing valve group, a sensor group, a pressure adjustment oil circuit, and a controller. The sensor group monitors the impact pressure and propulsion pressure values ​​in the pressure adjustment oil circuit in real time. The impact pressure in the pressure adjustment oil circuit is dynamically adjusted using an impact force adjustment oil circuit formed by connecting a first pressure valve group and a reversing valve group. Similarly, the propulsion pressure in the pressure adjustment oil circuit is dynamically adjusted using a propulsion force adjustment oil circuit formed by connecting a second pressure valve group and a reversing valve group. This improves drilling efficiency while extending equipment life, solving the problem that current hydraulic systems cannot adjust the impact pressure during operation according to actual working conditions.

Description

Technical Field

[0001] This utility model relates to a hydraulic system for rock entry in a top hammer drill, belonging to the field of engineering machinery technology. Background Technology

[0002] When operating a top hammer drill, the drill bit needs to be driven by impact pressure to break the rock layer. The appropriate rock entry impact pressure is particularly important for the entire construction process. Existing hydraulic systems mostly use fixed impact pressure or human experience to operate the machine for rock entry. Impact pressure that does not match the actual working environment will lead to energy waste and unstable drilling quality. The lack of dynamic feedback on real-time working conditions will result in low efficiency, severe drill bit wear, and even equipment overload failure. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a hydraulic system for rock entry in a top hammer drill, which can dynamically adjust the rock entry impact pressure in real time, thereby improving drilling efficiency and extending equipment life. This solves the problem that current hydraulic systems cannot adjust the impact pressure during operation according to actual working conditions.

[0004] To solve the above-mentioned technical problems, this utility model is implemented using the following technical solution:

[0005] This utility model provides a hydraulic system for rock entry in a top hammer drill, comprising:

[0006] tank;

[0007] The actuator is used for drilling, rotating, and propulsion movements.

[0008] The power source, connected to the oil tank, is used to provide the impact power, rotation power and propulsion power required for rock entry operations;

[0009] The reversing valve assembly is connected to the actuating unit and the power source respectively, and is used to switch the direction of the pressure oil;

[0010] The sensor group, connected to the reversing valve group, is used to monitor the corresponding impact pressure value, rotation pressure value and propulsion pressure value during the rock entry operation.

[0011] The pressure regulating oil circuit includes a first pressure valve group and a second pressure valve group; wherein, the first pressure valve group is connected to the reversing valve group to form an impact force regulating oil circuit; the second pressure valve group is connected to the reversing valve group to form a propulsion force regulating oil circuit;

[0012] The controller is electrically connected to the sensor group, the first pressure valve group, the second pressure valve group, the reversing valve group, and the power source, respectively.

[0013] Optionally, the reversing valve assembly includes an impact main valve, a rotary main valve, and a slow feed valve;

[0014] The main impact valve is connected to the actuating unit and the power source respectively, and the main impact valve is provided with a first monitoring port; the sensor group is connected to the first monitoring port to monitor the impact pressure value;

[0015] The rotary main valve is connected to the actuating unit and the power source respectively, and the rotary main valve is provided with a second monitoring port; the sensor group is connected to the second monitoring port to monitor the rotary pressure value;

[0016] The slow feed valve is connected to the actuating unit and the power source respectively, 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.

[0017] Optionally, the first pressure valve group includes a pressure reversing valve group A for switching the direction of pressure oil flow in the impact force adjustment oil circuit and an overflow valve group A for adjusting the flow rate of pressure oil in the impact force adjustment oil circuit.

[0018] Optionally, the pressure reversing valve group A includes a first solenoid valve A and a second solenoid valve A; the relief valve group A includes a first impact pressure relief valve, a second impact pressure relief valve and a third impact pressure relief valve;

[0019] The first solenoid valve A is connected to the first monitoring port and the second solenoid valve A respectively;

[0020] The first impact pressure relief valve is connected to the second solenoid valve A;

[0021] The second impact pressure relief valve is connected to the first solenoid valve A;

[0022] The third impact pressure relief valve is connected to the first solenoid valve A, the second solenoid valve A, and the second impact pressure relief valve.

[0023] The first impact pressure relief valve, the second impact pressure relief valve, and the third impact pressure relief valve are all connected to the oil tank;

[0024] The first, second, and third impact pressure relief valves have different pressure relief values.

[0025] Optionally, the pressure relief value of the first impact pressure relief valve is less than the pressure relief value of the third impact pressure relief valve and the pressure relief value of the second impact pressure relief valve.

[0026] Optionally, the second pressure valve group includes a pressure reversing valve group B for switching the direction of pressure oil flow in the thrust adjustment oil circuit and an overflow valve group B for adjusting the flow rate of pressure oil in the thrust adjustment oil circuit.

[0027] 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 relief valve group B includes a first propulsion pressure relief valve, a second propulsion pressure relief valve, a third propulsion pressure relief valve, a fourth propulsion pressure relief valve, and a fifth propulsion pressure relief valve.

[0028] The first solenoid valve B, the second solenoid valve B, and the third solenoid valve B are all connected to the third monitoring port.

[0029] The first solenoid valve B is connected to the first propulsion pressure relief valve;

[0030] The second solenoid valve B is connected to the second propulsion pressure relief valve;

[0031] The third solenoid valve B is connected to the fourth solenoid valve B and the fourth propulsion pressure relief valve respectively.

[0032] The fourth solenoid valve B is connected to the fifth propulsion pressure relief valve.

[0033] The third propulsion pressure relief valve is connected to the third solenoid valve B and the fourth propulsion pressure relief valve.

[0034] 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 oil tank;

[0035] 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.

[0036] 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.

[0037] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0038] 1. This utility model uses a sensor group to monitor the impact pressure and propulsion pressure values ​​in the pressure adjustment oil circuit in real time. It uses the impact force adjustment oil circuit formed by the connection of the first pressure valve group and the reversing valve group to dynamically adjust the impact pressure in the pressure adjustment oil circuit. It also uses the propulsion force adjustment oil circuit formed by the connection of the second pressure valve group and the reversing valve group to dynamically adjust the propulsion pressure in the pressure adjustment oil circuit. This improves drilling efficiency and extends equipment life, solving the problem that current hydraulic systems cannot adjust the impact pressure during operation according to actual working conditions.

[0039] 2. This utility model uses the cooperation of pressure reversing valve group A and overflow valve group A to dynamically adjust the impact pressure whose pressure value is between the first impact pressure overflow valve relief value and the second impact pressure overflow valve relief value.

[0040] 3. This utility model uses the cooperation of pressure reversing valve group B and overflow valve group B to dynamically adjust the propulsion pressure when the pressure value is between the first propulsion pressure overflow valve relief value and the fourth propulsion pressure overflow valve relief value. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of a hydraulic system for rock entry of a top hammer drill provided in Embodiment 1 of this utility model;

[0042] Figure 2 This is a schematic diagram of the structure of a hydraulic system for rock entry of a top hammer drill provided in Embodiment 2 of this utility model;

[0043] Figure 3 yes Figure 1 , Figure 2 A magnified view of point G in the middle.

[0044] In the diagram: 1. Oil tank; 201. Rock drill; 2011. Oil return port; 2012. Oil drain port; 2013. Impact oil inlet; 2014. First rotary oil inlet; 2015. Second rotary oil inlet; 202. Propulsion cylinder; 2021. First propulsion oil inlet; 2022. Second propulsion oil inlet; 203. Balance valve; 2031. Oil inlet V1; 2032. Oil inlet V2; 2033. Oil outlet D1; 2034. Oil outlet D2; 301. Engine; 302 3021, Impact main pump; 3022, Oil outlet P1; 303, Signal interface X1; 304, Rotary main pump; 305, Oil outlet P2; 306, Signal interface X2; 307, Gear pump; 308, Oil outlet P3; 409, Impact main valve; 4010, Oil outlet A1; 4011, Oil outlet A2; 4012, Oil outlet A2; 4013, Oil outlet A3; 4014, First monitoring port; 4015, Signal interface X1'; 4016, Impact return port; 402, Rotary main valve; 021, Oil outlet B1; 4022, Oil outlet B2; 4023, Signal interface X2'; 4024, Rotary return oil port; 403, Slow feed valve; 4031, Oil outlet C1; 4032, Oil outlet C2; 4033, Third monitoring port; 4034, Slow feed return oil 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 stroke 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

[0045] 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 should not be used to limit the scope of protection of the present invention.

[0046] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0048] like Figure 1 As shown, a hydraulic system for rock entry of a top hammer drill includes: an oil tank 1, an actuating unit, a power source, a reversing valve group, a sensor group, a pressure regulating oil circuit, and a controller;

[0049] The power source is connected to oil tank 1, which contains hydraulic oil.

[0050] 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 rotational 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 a transmission component.

[0051] Engine 301, impact main pump 302, rotary main pump 303 and gear pump 304 are all electrically connected to the controller;

[0052] The actuators include a rock drill 201, a propulsion cylinder 202, and a balance valve 203; the directional valve assembly includes an impact main valve 401, a rotary main valve 402, and a slow feed valve 403, specifically:

[0053] The main impact pump 302 is equipped with an oil inlet and an oil outlet P13021;

[0054] The rotary main pump 303 is equipped with an oil inlet and an oil outlet P23031;

[0055] Gear pump 304 is equipped with an oil inlet and an oil outlet P33041;

[0056] The impact main valve 401 is provided with an oil inlet, an oil outlet A14011, an oil outlet A24012 and an oil outlet A34013;

[0057] The rotary main valve 402 is provided with an oil inlet, an oil outlet B14021 and an oil outlet B24022;

[0058] The slow feed valve 403 is provided with an oil inlet, an oil outlet C14031 and an oil outlet C24032;

[0059] The rock drill 201 is equipped 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;

[0060] The balance valve 203 is provided with an oil inlet V12031, an oil inlet V22032, an oil outlet D12033, and an oil outlet D22034;

[0061] The propulsion cylinder 202 is provided with a first propulsion port 2021 and a second propulsion port 2022.

[0062] Among them, the oil inlet of the impact main pump 302 is connected to the oil tank 1;

[0063] The oil outlet P13021 is connected to a high-pressure filter 8, which is connected to the oil inlet of the impact main valve 401.

[0064] Oil outlet A14011 is connected to impact oil inlet 2013 of rock drill 201, and oil return port 2011 and oil drain port 2012 of rock drill 201 are both connected to oil tank 1.

[0065] Oil outlet A24012 is connected to oil inlet V12031, oil outlet A34013 is connected to oil inlet V22032, oil outlet D12033 is connected to the first propulsion oil port 2021, and oil outlet D22034 is connected to the second propulsion oil port 2022.

[0066] The oil inlet of the rotary main pump 303 is connected to the oil tank 1;

[0067] Oil outlet P23031 is connected to the oil inlet of rotary main valve 402, oil outlet B14021 is connected to the first rotary oil inlet 2014, and oil outlet B24022 is connected to the second rotary oil inlet 2015.

[0068] The oil inlet of gear pump 304 is connected to oil tank 1;

[0069] Oil outlet P33041 is connected to the oil inlet of slow feed valve 403, oil outlet C14031 is connected to oil inlet V12031, and oil outlet C14031 is connected to oil inlet V22032.

[0070] The balance valve 203, the impact main valve 401, the rotary main valve 402, and the slow feed valve 403 are all electrically connected to the controller.

[0071] The sensor group includes a first pressure sensor 501, a second pressure sensor 502, and a third pressure sensor 503;

[0072] Specifically, 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.

[0073] The main valve 401 is also provided with a first monitoring port 4014, which is connected to the first pressure sensor 501.

[0074] The oil outlet B14021 of the rotary main valve 402 is used as the second monitoring port, and the oil outlet B14021 is connected to the second pressure sensor 502.

[0075] The slow feed valve 403 is also provided with a third monitoring port 4033, which is connected to the third pressure sensor 503;

[0076] The first pressure sensor 501, the second pressure sensor 502, and the third pressure sensor 503 are all electrically connected to the controller.

[0077] The pressure regulating oil circuit includes a first pressure valve group and a second pressure valve group;

[0078] The first pressure valve assembly is connected to the directional valve assembly, forming an impact force adjustment oil circuit, specifically:

[0079] like Figure 3 As shown, the pressure reversing valve group A includes a first solenoid valve A6011 and a second solenoid valve A6012; wherein, the relief valve group A includes a first impact pressure relief valve 6021, a second impact pressure relief valve 6022 and a third impact pressure relief valve 6023.

[0080] The first solenoid valve A6011 is connected to the first monitoring port 4014 and the second solenoid valve A6012 respectively;

[0081] The first impact pressure relief valve 6021 is connected to the second solenoid valve A6012;

[0082] The second impact pressure relief valve 6022 is connected to the first solenoid valve A6011;

[0083] The third impact pressure relief valve 6023 is connected to the first solenoid valve A6011, the second solenoid valve A6012, and the second impact pressure relief valve 6022.

[0084] The first impact pressure relief valve 6021, the second impact pressure relief valve 6022, and the third impact pressure relief valve 6023 are all connected to the oil tank 1.

[0085] The first solenoid valve A6011, the second solenoid valve A6012, the first impact pressure relief valve 6021, the second impact pressure relief valve 6022, and the third impact pressure relief valve 6023 are all electrically connected to the controller.

[0086] The pressure relief value of the first impact pressure relief valve 6021 is less than the pressure relief value of the third impact pressure relief valve 6023, which is less than the pressure relief value of the second impact pressure relief valve 6022. Through the cooperation of the pressure reversing valve group A and the relief valve group A, the impact pressure between the pressure relief values ​​of the first impact pressure relief valve 6021 and the second impact pressure relief valve 6022 is dynamically adjusted, so that the impact pressure of the rock drill 201 is in a continuous changing process, thereby eliminating the damage to the rock drill 201 caused by the instantaneous switching of impact pressure.

[0087] The second pressure valve assembly is connected to the reversing valve assembly to form a thrust adjustment oil circuit, specifically:

[0088] The second pressure valve group includes a pressure directional valve group B for switching the direction of pressure oil flow in the thrust adjustment oil circuit and a relief valve group B for adjusting the flow rate of pressure oil in the thrust adjustment oil circuit; wherein, the pressure directional 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 relief valve group B includes a first thrust pressure relief valve 7021, a second thrust pressure relief valve 7022, a third thrust pressure relief valve 7023, a fourth thrust pressure relief valve 7024 and a fifth thrust pressure relief valve 7025;

[0089] 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.

[0090] The first solenoid valve B7011 is connected to the first propulsion pressure relief valve 7021;

[0091] The second solenoid valve B7012 is connected to the second propulsion pressure relief valve 7022;

[0092] The third solenoid valve B7013 is connected to the fourth solenoid valve B7014 and the fourth propulsion pressure relief valve 7024 respectively.

[0093] The fourth solenoid valve B7014 is connected to the fifth propulsion pressure relief valve 7025;

[0094] The third propulsion pressure relief valve 7023 is connected to the third solenoid valve B7013 and the fourth propulsion pressure relief valve 7024.

[0095] 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 oil tank 1.

[0096] 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.

[0097] 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 between the pressure relief values ​​of the first propulsion pressure relief valve 7021 and the fourth propulsion pressure relief valve 7024 is dynamically adjusted.

[0098] The impact main valve 401 is also provided with an impact return port 4016, which is connected to the oil tank 1.

[0099] The rotary main valve 402 is also provided with a rotary return port 4024, which is connected to the oil tank 1;

[0100] The slow feed valve 403 is also provided with a slow feed return port 4034, which is connected to the oil tank 1.

[0101] It should be noted that the drilling rig needs to perform rod connection and disconnection operations before and after operation;

[0102] When the rod is connected, the second solenoid valve B7012 is energized, and the push pressure is monitored by the third pressure sensor 503. The push pressure of the rod is limited through the oil circuit connected by the oil outlet B14021, the second solenoid valve B7012 and the second push pressure relief valve 7022.

[0103] 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 disassembly propulsion pressure is limited through the oil circuit connected by the oil outlet B14021, the second solenoid valve A6012, and the first propulsion pressure relief valve 7021. Example

[0104] like Figure 2 As shown, a hydraulic system for rock entry of a top hammer drill includes: an oil tank 1, an actuating unit, a power source, a reversing valve group, a sensor group, a pressure regulating oil circuit, and a controller;

[0105] The power source is connected to oil tank 1, which contains hydraulic oil.

[0106] 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 rotational 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 a transmission component.

[0107] Engine 301, impact main pump 302, rotary main pump 303 and gear pump 304 are all electrically connected to the controller;

[0108] The actuators include a rock drill 201, a propulsion cylinder 202, and a balance valve 203; the directional valve assembly includes an impact main valve 401, a rotary main valve 402, and a slow feed valve 403, specifically:

[0109] The main impact pump 302 is equipped with an oil inlet and an oil outlet P13021;

[0110] The rotary main pump 303 is equipped with an oil inlet and an oil outlet P23031;

[0111] Gear pump 304 is equipped with an oil inlet and an oil outlet P33041;

[0112] The impact main valve 401 is provided with an oil inlet, an oil outlet A14011, an oil outlet A24012 and an oil outlet A34013;

[0113] The rotary main valve 402 is provided with an oil inlet, an oil outlet B14021 and an oil outlet B24022;

[0114] The slow feed valve 403 is provided with an oil inlet, an oil outlet C14031 and an oil outlet C24032;

[0115] The rock drill 201 is equipped 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;

[0116] The balance valve 203 is provided with an oil inlet V12031, an oil inlet V22032, an oil outlet D12033, and an oil outlet D22034;

[0117] The propulsion cylinder 202 is provided with a first propulsion port 2021 and a second propulsion port 2022.

[0118] Among them, the oil inlet of the impact main pump 302 is connected to the oil tank 1;

[0119] The oil outlet P13021 is connected to a high-pressure filter 8, which is connected to the oil inlet of the impact main valve 401.

[0120] Oil outlet A14011 is connected to impact oil inlet 2013 of rock drill 201, and oil return port 2011 and oil drain port 2012 of rock drill 201 are both connected to oil tank 1.

[0121] Oil outlet A24012 is connected to oil inlet V12031, oil outlet A34013 is connected to oil inlet V22032, oil outlet D12033 is connected to the first propulsion oil port 2021, and oil outlet D22034 is connected to the second propulsion oil port 2022.

[0122] The oil inlet of the rotary main pump 303 is connected to the oil tank 1;

[0123] Oil outlet P23031 is connected to the oil inlet of rotary main valve 402, oil outlet B14021 is connected to the first rotary oil inlet 2014, and oil outlet B24022 is connected to the second rotary oil inlet 2015.

[0124] The oil inlet of gear pump 304 is connected to oil tank 1;

[0125] Oil outlet P33041 is connected to the oil inlet of slow feed valve 403, oil outlet C14031 is connected to oil inlet V12031, and oil outlet C14031 is connected to oil inlet V22032.

[0126] The balance valve 203, the impact main valve 401, the rotary main valve 402, and the slow feed valve 403 are all electrically connected to the controller.

[0127] The sensor group includes a first pressure sensor 501, a second pressure sensor 502, and a third pressure sensor 503;

[0128] Specifically, 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.

[0129] The main valve 401 is also provided with a first monitoring port 4014, which is connected to the first pressure sensor 501.

[0130] The oil outlet B14021 of the rotary main valve 402 is used as the second monitoring port, and the oil outlet B14021 is connected to the second pressure sensor 502.

[0131] The slow feed valve 403 is also provided with a third monitoring port 4033, which is connected to the third pressure sensor 503;

[0132] The first pressure sensor 501, the second pressure sensor 502, and the third pressure sensor 503 are all electrically connected to the controller.

[0133] The pressure regulating oil circuit includes a first pressure valve group and a second pressure valve group;

[0134] The first pressure valve assembly is connected to the directional valve assembly, forming an impact force adjustment oil circuit, specifically:

[0135] like Figure 3 As shown, the first pressure valve group includes a pressure directional valve group A and a relief valve group A;

[0136] The pressure directional valve group A includes a first solenoid valve A6011 and a second solenoid valve A6012; wherein, the relief valve group A includes a first impact pressure relief valve 6021, a second impact pressure relief valve 6022 and a third impact pressure relief valve 6023.

[0137] The first solenoid valve A6011 is connected to the first monitoring port 4014 and the second solenoid valve A6012 respectively;

[0138] The first impact pressure relief valve 6021 is connected to the second solenoid valve A6012;

[0139] The second impact pressure relief valve 6022 is connected to the first solenoid valve A6011;

[0140] The third impact pressure relief valve 6023 is connected to the first solenoid valve A6011, the second solenoid valve A6012, and the second impact pressure relief valve 6022.

[0141] The first impact pressure relief valve 6021, the second impact pressure relief valve 6022, and the third impact pressure relief valve 6023 are all connected to the oil tank 1.

[0142] The first solenoid valve A6011, the second solenoid valve A6012, the first impact pressure relief valve 6021, the second impact pressure relief valve 6022, and the third impact pressure relief valve 6023 are all electrically connected to the controller.

[0143] The pressure relief value of the first impact pressure relief valve 6021 is less than the pressure relief value of the third impact pressure relief valve 6023, which is less than the pressure relief value of the second impact pressure relief valve 6022. Through the cooperation of the pressure reversing valve group A and the relief valve group A, the impact pressure between the pressure relief values ​​of the first impact pressure relief valve 6021 and the second impact pressure relief valve 6022 is dynamically adjusted, so that the impact pressure of the rock drill 201 is in a continuous changing process, thereby eliminating the damage to the rock drill 201 caused by the instantaneous switching of impact pressure.

[0144] The second pressure valve assembly is connected to the reversing valve assembly to form a thrust adjustment oil circuit, specifically:

[0145] The second pressure valve assembly includes a pressure directional valve assembly B and a relief valve assembly B;

[0146] The pressure directional 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; wherein, 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;

[0147] 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.

[0148] The first solenoid valve B7011 is connected to the first propulsion pressure relief valve 7021;

[0149] The second solenoid valve B7012 is connected to the second propulsion pressure relief valve 7022;

[0150] The third solenoid valve B7013 is connected to the fourth solenoid valve B7014 and the fourth propulsion pressure relief valve 7024 respectively.

[0151] The fourth solenoid valve B7014 is connected to the fifth propulsion pressure relief valve 7025;

[0152] The third propulsion pressure relief valve 7023 is connected to the third solenoid valve B7013 and the fourth propulsion pressure relief valve 7024.

[0153] 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 oil tank 1.

[0154] 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.

[0155] 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 between the pressure relief values ​​of the first propulsion pressure relief valve 7021 and the fourth propulsion pressure relief valve 7024 is dynamically adjusted.

[0156] The impact main valve 401 is also provided with an impact return port 4016, which is connected to the oil tank 1.

[0157] The rotary main valve 402 is also provided with a rotary return port 4024, which is connected to the oil tank 1;

[0158] The slow feed valve 403 is also provided with a slow feed return port 4034, which is connected to the oil tank 1.

[0159] The impact main pump 302 is also equipped with a signal interface X13022, and the impact main valve 401 is also equipped with a signal interface X1'4015. The signal interface X13022 and the signal interface X1'4015 are electrically connected. Hydraulic oil enters from the oil inlet of the impact main pump 302 and enters the impact main valve 401 from the oil inlet of the impact main valve 401 through the oil outlet P13021 and the high pressure filter. The pressurized oil enters the rock drill 201 through the impact oil inlet 2013 of the rock drill 201 from the oil outlet A14011 of the impact main valve 401 and drives the rock drill 201 to move. The signal interface X13022 is used to receive pressure feedback signals for adjusting the displacement of the impact main pump 302.

[0160] The rotary main pump 303 is also equipped with a signal interface X23032, and the rotary main valve 402 is also equipped with a signal interface X2'4023. The signal interfaces X23032 and X2'4023 are electrically connected. Hydraulic oil enters from the oil inlet of the rotary main pump 303 and enters the rotary main valve 402 from the oil inlet of the rotary main valve 402 through the oil outlet P23031. The pressurized oil enters the rock drill 201 through the oil outlet B14021 and oil outlet B24022, through the first rotary oil inlet 2014 and the second rotary oil inlet 2015, and drives the rock drill 201 to move. The signal interface X23032 is used to receive pressure feedback signals and is used for the displacement adjustment of the rotary main pump 303.

[0161] Hydraulic oil enters from the inlet of the impact main pump 302 and passes through the high-pressure filter from the outlet P13021 into the impact main valve 401. The pressurized oil enters the balance valve 203 from the outlet A24012 and outlet A34013 of the impact main valve 401 through the inlet V12031 and inlet V22032.

[0162] Hydraulic oil enters from the inlet of gear pump 304 and enters the slow feed valve 403 from the inlet of slow feed valve 403 through outlet P33041. Pressure oil enters the balance valve 203 through outlet C14031 and outlet C24032 of slow feed valve 403 via inlet V12031 and inlet V22032.

[0163] The pressure oil in the balance valve 203 eventually enters the propulsion cylinder 202 through the first propulsion port 2021 and the second propulsion port 2022 via the oil outlet D12033 and the oil outlet D22034.

[0164] It should be noted that the drilling rig needs to perform rod connection and disconnection operations before and after operation;

[0165] When the rod is connected, the second solenoid valve B7012 is energized, and the push pressure is monitored by the third pressure sensor 503. The push pressure of the rod is limited through the oil circuit connected by the oil outlet B14021, the second solenoid valve B7012 and the second push pressure relief valve 7022.

[0166] 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 disassembly propulsion pressure is limited through the oil circuit connected by the oil outlet B14021, the second solenoid valve A6012, and the first propulsion pressure relief valve 7021.

[0167] Working principle

[0168] When the drilling rig is drilling, the impact pressure value is monitored by the first pressure sensor 501. The first solenoid valve A6011 and the second solenoid valve A6012 are both energized. At this time, the pressure is released through the first impact pressure relief valve 6021. As the impact drill bit gradually drills in, the rotation pressure value monitored by the second pressure sensor 502 will gradually increase. When the rotation pressure reaches the preset threshold, the second solenoid valve A6012 is de-energized, so that the impact pressure is released by the third impact pressure relief valve 6023. When the impact pressure continues to increase, the impact pressure is finally released by the third impact pressure relief valve 6023 and the second impact pressure relief valve 6022.

[0169] When the drilling rig is drilling, the propulsion pressure value is monitored by the third pressure sensor 503. The third solenoid valve B7013 and the fourth solenoid valve B7014 are energized, and the pressure is released through the fifth propulsion pressure relief valve 7025. If the propulsion pressure value still rises, the fourth solenoid valve B7014 is de-energized, and the propulsion pressure is released by the third propulsion pressure relief valve 7023 and the fourth propulsion pressure relief valve 7024.

[0170] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A hydraulic system for rock entry in a top hammer drill rig, characterized in that, include: Fuel tank (1); The actuator is used for drilling, rotating, and propulsion movements. The power source is connected to the oil tank (1) and is used to provide the impact power, rotation power and propulsion power required for rock entry operations; The reversing valve assembly is connected to the actuating unit and the power source respectively, and is used to switch the direction of the pressure oil; The sensor group, connected to the reversing valve group, is used to monitor the corresponding impact pressure value, rotation pressure value and propulsion pressure value during the rock entry operation. The pressure regulating oil circuit includes a first pressure valve group and a second pressure valve group; wherein, the first pressure valve group is connected to the reversing valve group to form an impact force regulating oil circuit; the second pressure valve group is connected to the reversing valve group to form a propulsion force regulating oil circuit; The controller is electrically connected to the sensor group, the first pressure valve group, the second pressure valve group, the reversing valve group, and the power source, respectively.

2. The hydraulic system for rock entry of a top hammer drill rig according to claim 1, characterized in that, The reversing valve assembly includes an impact main valve (401), a rotary main valve (402), and a slow feed valve (403). The impact main valve (401) is connected to the actuating unit and the power source respectively, 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 rotary main valve (402) is connected to the actuating unit and the power source respectively, and the rotary main valve (402) is provided with a second monitoring port; the sensor group is connected to the second monitoring port to monitor the rotary pressure value; The slow feed valve (403) is connected to the actuating unit and the power source respectively, 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 rock entry of a top hammer drill rig according to claim 2, characterized in that, The first pressure valve group includes a pressure reversing valve group A for switching the direction of pressure oil flow in the impact force adjustment oil circuit and an overflow valve group A for adjusting the flow rate of pressure oil in the impact force adjustment oil circuit.

4. The hydraulic system for rock entry of a top hammer drill rig according to claim 3, characterized in that, The pressure reversing valve group A includes a first solenoid valve A (6011) and a second solenoid valve A (6012); the relief valve group A includes a first impact pressure relief valve (6021), a second impact pressure relief valve (6022) and a third impact pressure relief valve (6023). The first solenoid valve A (6011) is connected to the first monitoring port (4014) and the second solenoid valve A (6012) respectively; The first impact pressure relief valve (6021) is connected to the second solenoid valve A (6012); The second impact pressure relief valve (6022) is connected to the first solenoid valve A (6011); The third impact pressure relief valve (6023) is connected to the first solenoid valve A (6011), the second solenoid valve A (6012), and the second impact pressure relief valve (6022); The first impact pressure relief valve (6021), the second impact pressure relief valve (6022) and the third impact pressure relief valve (6023) are all connected to the oil tank (1); The pressure relief values ​​of the first impact pressure relief valve (6021), the second impact pressure relief valve (6022), and the third impact pressure relief valve (6023) are different.

5. The hydraulic system for rock entry of a top hammer drill rig according to claim 4, characterized in that, The pressure relief value of the first impact pressure relief valve (6021) is less than the pressure relief value of the third impact pressure relief valve (6023) and less than the pressure relief value of the second impact pressure relief valve (6022).

6. The hydraulic system for rock entry of a top hammer drill rig according to claim 2, characterized in that, The second pressure valve assembly includes a pressure directional valve assembly B for switching the direction of pressure oil flow in the thrust adjustment oil circuit and an overflow valve assembly B for adjusting the flow rate of pressure oil in the thrust adjustment oil circuit.

7. The hydraulic system for rock entry of a top hammer drill rig 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 connected to the fourth solenoid valve B (7014) and the fourth propulsion pressure relief valve (7024) respectively; 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 oil tank (1); 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 rock entry of a top hammer drill rig according to claim 7, characterized in that, The pressure relief value of the first propulsion pressure relief valve (7021) is less than the pressure relief value of the second propulsion pressure relief valve (7022) and the pressure relief value of the fifth propulsion pressure relief valve (7025) and the pressure relief value of the third propulsion pressure relief valve (7023) and the pressure relief value of the fourth propulsion pressure relief valve (7024).

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