Hydraulic oil system and cone drill with same

Abstract

The utility model relates to the technical field of hydraulic pressure, and discloses a hydraulic oil system and a cone drill with the hydraulic oil system. The first oil return branch pipe is connected with the oil return header pipe, a first hydraulic control valve is connected to the first oil return branch pipe, and an outlet of the first oil return branch pipe is communicated with an oil return tank of the first power system; the second oil return branch pipe is connected with the oil return header pipe, a second hydraulic control valve is connected to the second oil return branch pipe, and an outlet of the second oil return branch pipe is communicated with an oil return tank of the second power system; and the hydraulic control system is used for controlling the first hydraulic control valve and the second hydraulic control valve to be opened or closed. According to the hydraulic oil system provided by the embodiment, automatic oil return switching among different power systems is achieved, the problem that oil return paths in an existing dual-power cone drill hydraulic system are disordered is solved, a powerful guarantee is provided for stable operation of a cone drill under different working conditions, and the overall performance and reliability of the cone drill are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology, specifically to a hydraulic oil system and a roller cone drill having the same. Background Technology

[0002] In large-scale open-pit mining operations, rotary drills are key drilling equipment, and their technological development is crucial for improving mining efficiency and reducing costs. To enhance operational economy and adaptability, dual-power technology has emerged. During operation, the rotary drill uses an electric motor to drive the hydraulic system, fully utilizing the low-cost advantage of grid power. For long-distance relocation, a diesel engine drives the walking system, effectively solving the problem of insufficient battery range.

[0003] However, existing dual-power rotary drills have certain deficiencies in hydraulic system oil return. Because the generator and diesel engine are installed far apart on the equipment, the hydraulic system uses two independent hydraulic oil tanks to meet the needs of the two different power modes: electric motor drive and diesel engine drive.

[0004] In actual operation, both travel and cable reel winding / unwinding are functions that need to be achieved in both power drive modes. Currently, the hydraulic system of dual-power rotary drills has a large flow rate, and setting up conventional switching valves or solenoid valves in the circuit would require a lot of space. Therefore, without switching valves or solenoid valves, there is no effective oil return switching mechanism. As a result, the oil leakage and return of the travel motor and cable reel motor cannot automatically return to the hydraulic oil tank corresponding to the current drive mode after the corresponding drive mode is started. Utility Model Content

[0005] In view of this, the present invention provides a hydraulic oil system and a roller cone drill having the same, in order to solve the problem that the existing dual-power roller cone drill hydraulic system lacks an effective automatic oil return switching mechanism.

[0006] This utility model provides a hydraulic oil system, including: a main return oil pipe connected to the return oil circuit of the working equipment; a first return oil branch pipe connected to the main return oil pipe, a first hydraulic control valve connected to the first return oil branch pipe, and the outlet of the first return oil branch pipe connected to the return oil tank of a first power system; a second return oil branch pipe connected to the main return oil pipe, a second hydraulic control valve connected to the second return oil branch pipe, and the outlet of the second return oil branch pipe connected to the return oil tank of a second power system; and a hydraulic control system for controlling the opening or closing of the first hydraulic control valve and the second hydraulic control valve.

[0007] With the above settings, the hydraulic control system can precisely control the opening and closing states of the first and second hydraulic control valves when the working equipment is in different power drive modes. When the first power system is working, the hydraulic control system opens the first hydraulic control valve and closes the second hydraulic control valve, allowing the return oil from the working equipment to flow into the first return oil branch pipe through the return oil main pipe, and then back to the return oil tank of the first power system. Conversely, when the second power system is working, the hydraulic control system closes the first hydraulic control valve and opens the second hydraulic control valve, allowing the return oil to flow into the return oil tank of the second power system through the second return oil branch pipe. This achieves automatic switching of the working equipment's return oil, effectively solving the problem in existing dual-power rotary drill hydraulic systems where the lack of an effective return oil switching mechanism prevents the return oil from the travel motor and cable reel motor from automatically returning to the corresponding hydraulic oil tank under different drive modes.

[0008] Optionally, the first hydraulic control valve and the second hydraulic control valve are normally open valves.

[0009] With the above settings, both the first and second hydraulic control valves remain open in the initial state of the hydraulic oil system or when the hydraulic control system has not initiated any control actions. The hydraulic oil in the main return pipe can flow smoothly to the first and second return branch pipes during the initial system startup, ensuring a smooth initial return path and preventing return oil blockage caused by valve closure, thus reducing pressure surges during system startup. The normally open valve design simplifies the system's control logic, reduces the operating frequency of the hydraulic control system in situations where frequent switching of the return path is not required, improves system stability and reliability, and lowers maintenance costs.

[0010] Optionally, the first hydraulic control valve and the second hydraulic control valve are cover-mounted cartridge valves.

[0011] With the above-described configuration, the compact structure of the cover plate cartridge valve makes the installation of the first and second hydraulic control valves on the first and second return oil branch pipes more convenient, effectively saving installation space in the hydraulic system and meeting the stringent spatial layout requirements of roller cone drills. Furthermore, the excellent sealing performance of the cover plate cartridge valve prevents hydraulic oil leakage, ensuring no oil seepage occurs during the transmission of return oil in the branch pipes, guaranteeing stable return oil flow, and improving the working efficiency of the hydraulic system.

[0012] Optionally, the control oil circuit of the first hydraulic control valve is connected to the outlet of the oil supply device driven by the first power system, and the control oil circuit of the second hydraulic control valve is connected to the outlet of the oil supply device driven by the second power system; or, the control oil circuit of the first hydraulic control valve is connected to the outlet of the oil supply device driven by the second power system, and the control oil circuit of the second hydraulic control valve is connected to the outlet of the oil supply device driven by the first power system.

[0013] Through the above settings, close coordinated control between the hydraulic control valve and the power system can be achieved. When the control oil circuit of the first hydraulic control valve is connected to the outlet of the oil supply device driven by the first power system, and the second hydraulic control valve is connected to the oil supply device of the second power system, when the first power system starts working, its oil supply device outputs pressurized oil. The pressurized oil simultaneously enters the control oil circuit of the first hydraulic control valve, causing the first hydraulic control valve to open. The return oil flows smoothly into the return oil tank of the first power system, achieving precise return oil control. Similarly, when the second power system is working, the second hydraulic control valve can also open in a timely manner to ensure the correct return oil path.

[0014] Optionally, the hydraulic oil system further includes: a main drain pipe connected to the drain circuit of the working equipment; a first drain branch pipe connected to the main drain pipe, wherein a third hydraulic control valve is connected to the first drain branch pipe, and the outlet of the first drain branch pipe is connected to the return oil tank of the first power system; a second drain branch pipe connected to the main drain pipe, wherein a fourth hydraulic control valve is connected to the second drain branch pipe, and the outlet of the second drain branch pipe is connected to the return oil tank of the second power system; the third hydraulic control valve and the fourth hydraulic control valve are respectively controlled to open and close through the hydraulic control system.

[0015] Through the above settings, the oil draining from the working equipment can be managed in an orderly manner. When different power systems are operating, the hydraulic control system can precisely control the third and fourth hydraulic control valves according to the power mode switching. When the first power system is running, the hydraulic control system opens the third hydraulic control valve and closes the fourth hydraulic control valve, allowing the drained oil in the working equipment's main drain pipe to flow into the return oil tank of the first power system through the first drain branch pipe. When the second power system is running, the hydraulic control system closes the third hydraulic control valve and opens the fourth hydraulic control valve, allowing the drained oil to flow into the return oil tank of the second power system through the second drain branch pipe. This ensures that the drained oil accurately returns to the corresponding power system's return oil tank, avoiding system failures caused by chaotic draining, and also makes the draining and return processes of the hydraulic oil system work in coordination, further improving the stability and reliability of the entire hydraulic oil system.

[0016] Optionally, the third hydraulic control valve and the fourth hydraulic control valve are normally closed valves.

[0017] With the above settings, the third and fourth hydraulic control valves remain closed under normal conditions, which can effectively prevent hydraulic oil in the drain manifold from accidentally flowing into the drain branch pipe due to abnormal pressure fluctuations when the system is not started or the corresponding power system is not working. This avoids unnecessary oil leakage, thereby maintaining the pressure stability within the hydraulic oil system and ensuring the normal operation of the entire system.

[0018] Optionally, the third hydraulic control valve and the fourth hydraulic control valve are hydraulic control check valves.

[0019] With the above configuration, the hydraulically controlled check valve possesses excellent unidirectional conduction characteristics. Under normal conditions, it strictly prevents oil in the main drain pipe from flowing back into the branch drain pipe, ensuring the unidirectional nature of the draining process and preventing damage to the working equipment and hydraulic system caused by backflow, thus guaranteeing the normal operation of the system. When the corresponding power system is started and the hydraulic control system provides control pressure, the hydraulically controlled check valve can reliably open, allowing oil in the main drain pipe to flow smoothly into the corresponding return tank through the first or second branch drain pipe.

[0020] Optionally, the control oil circuit of the third hydraulic control valve is connected to the outlet of the oil supply device driven by the first power system, and the control oil circuit of the fourth hydraulic control valve is connected to the outlet of the oil supply device driven by the second power system; or, the control oil circuit of the third hydraulic control valve is connected to the outlet of the oil supply device driven by the second power system, and the control oil circuit of the fourth hydraulic control valve is connected to the outlet of the oil supply device driven by the first power system.

[0021] Through the above settings, a close connection and precise control between the oil draining process and the power system can be achieved. When the control oil circuit of the third hydraulic control valve is connected to the outlet of the oil supply device driven by the first power system, and the fourth hydraulic control valve is connected to the oil supply device of the second power system, the first power system starts. The pressure oil output by its oil supply device provides power to the system and enters the control oil circuit of the third hydraulic control valve, opening the third hydraulic control valve. This allows the oil drained from the working equipment to flow accurately into the return oil tank of the first power system through the first oil drain branch pipe. When the second power system is working, the fourth hydraulic control valve can also open normally according to this mechanism, ensuring that the drained oil flows to the return oil tank of the second power system, thus ensuring the matching of the oil draining path with the power system.

[0022] Optionally, the hydraulic control system includes: an electromagnetic switching valve, which is connected to the control oil circuits of the first hydraulic control valve and the second hydraulic control valve, and is used to switch the control oil circuits of the first hydraulic control valve and the second hydraulic control valve.

[0023] With the above setup, the electromagnetic switching valve can quickly and accurately switch the control oil circuits of the first and second hydraulic control valves. When the roller cone drill switches from one power drive mode to another, simply energizing or de-energizing the electromagnetic switching valve can rapidly change the on / off state of the control oil circuit. The electromagnetic switching valve is easy to integrate with automated control systems, enabling remote control and intelligent operation, further improving the automation level of the roller cone drill, reducing the labor intensity of operators, and meeting the high-efficiency and intelligent operation requirements of modern mining.

[0024] This utility model also provides a roller cone drill, including the hydraulic oil system described in any of the above claims.

[0025] Through the above settings, the performance of the roller cone drill is significantly improved. The hydraulic oil system can automatically switch between return and drain paths, ensuring stable operation of the power system, reducing downtime, and improving work efficiency. The system's precise control of the hydraulic oil allows the roller cone drill to flexibly adjust parameters during drilling, improving drilling quality. Moreover, the system has high stability and a low probability of failure; its redundant design enhances reliability and reduces maintenance costs and difficulty. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a connection diagram of a specific embodiment of the hydraulic oil system provided in this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Main return oil pipe; 2. First return oil branch pipe; 3. Second return oil branch pipe; 4. Hydraulic control system; 5. First hydraulic control valve; 6. Second hydraulic control valve; 7. Return oil port of the first power system return oil tank; 8. Return oil port of the second power system return oil tank; 9. Main drain pipe; 10. First drain branch pipe; 11. Second drain branch pipe; 12. Third hydraulic control valve; 13. Fourth hydraulic control valve; 14. Drain port of the first power system return oil tank; 15. Drain port of the second power system return oil tank. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0031] The following is combined Figure 1 The following describes embodiments of the present invention.

[0032] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment, including: a return oil main pipe 1, a first return oil branch pipe 2, a second return oil branch pipe 3, and a hydraulic control system 4.

[0033] Specifically, the main return oil pipe 1 is connected to the return oil circuit of the working equipment; the first return oil branch pipe 2 is connected to the main return oil pipe 1, and a first hydraulic control valve 5 is connected to the first return oil branch pipe 2. The outlet of the first return oil branch pipe 2 is connected to the return oil tank of the first power system; the second return oil branch pipe 3 is connected to the main return oil pipe 1, and a second hydraulic control valve 6 is connected to the second return oil branch pipe 3. The outlet of the second return oil branch pipe 3 is connected to the return oil tank of the second power system; the hydraulic control system 4 is used to control the opening or closing of the first hydraulic control valve 5 and the second hydraulic control valve 6.

[0034] In this embodiment, when the working equipment is in operation, hydraulic oil flows from the actuators of the working equipment, after performing work, into the return oil main pipe 1 through the return oil circuit. At this time, the hydraulic control system 4 controls the opening and closing states of the first hydraulic control valve 5 and the second hydraulic control valve 6 according to the power system currently used by the rotary drill. If the rotary drill is operating with the first power system, the hydraulic control system 4 controls the first hydraulic control valve 5 to open and simultaneously closes the second hydraulic control valve 6. In this way, the hydraulic oil in the return oil main pipe 1 flows smoothly into the first return oil branch pipe 2 and finally returns to the return oil tank of the first power system. This process ensures that when the first power system is running, the hydraulic oil can circulate along a predetermined path, providing a stable hydraulic oil supply to the first power system, ensuring its normal operation, and avoiding problems such as abnormal system pressure and accelerated component wear caused by poor return oil flow, thereby improving the reliability and service life of the first power system. Conversely, when the rotary drill switches to the second power system, the hydraulic control system 4 responds quickly, closing the first hydraulic control valve 5 and opening the second hydraulic control valve 6. Therefore, the hydraulic oil in the main return pipe 1 flows into the second return branch pipe 3 and enters the return oil tank of the second power system. Through this precise control method, the hydraulic oil system realizes automatic switching of return oil between different power systems, solves the problem of chaotic return oil paths in the existing dual-power roller cone drill hydraulic system, provides strong support for the stable operation of the roller cone drill under different working conditions, and significantly improves the overall performance and reliability of the roller cone drill.

[0035] It should be noted that the return oil tanks of the first power system and the second system are not shown in the figure. The outlet of the first return oil branch pipe 2 in the figure is connected to the return oil port 7 of the first power system return oil tank, and the outlet of the second return oil branch pipe 3 is connected to the return oil port 8 of the second power system return oil tank.

[0036] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment, wherein the first hydraulic control valve 5 and the second hydraulic control valve 6 are normally open valves.

[0037] Specifically, during the initial startup phase of the hydraulic system, since the first hydraulic control valve 5 and the second hydraulic control valve 6 are normally open valves, the hydraulic oil in the main return pipe 1 can quickly and smoothly flow into the first return branch pipe 2 and the second return branch pipe 3, respectively. This process greatly shortens the return oil response time during system startup, avoids pressure surges caused by return oil obstruction due to valve closure, effectively protects various hydraulic components in the system, and extends their service life. In case of malfunctions in the hydraulic control system 4 or sudden power outages, the normally open valves ensure that return oil can still flow through the two return branch pipes, providing a certain degree of redundancy protection for the system. This prevents a sharp increase in system pressure due to return oil interruption, enhancing the reliability and stability of the entire hydraulic system.

[0038] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment, wherein the first hydraulic control valve 5 and the second hydraulic control valve 6 are cover plate cartridge valves.

[0039] Specifically, because the first hydraulic control valve 5 and the second hydraulic control valve 6 are cover-plate cartridge valves, their compact structure effectively saves space in the hydraulic oil system during installation. Within the limited space of a roller cone drill, this compact design allows for a more rational layout of the return branch pipe, reducing the overall space occupied by the system. This facilitates the miniaturization and integration of the equipment and provides more space for the installation and arrangement of other components.

[0040] In other embodiments, the first hydraulic control valve 5 and the second hydraulic control valve 6 can also be normally open ball valves. Normally open ball valves use a ball as the opening and closing element, and the through-hole on the ball is normally connected to the oil circuit, allowing oil to flow smoothly. When it is necessary to close, the oil flow is cut off by rotating the ball. They offer good sealing performance, can withstand high pressure, and have rapid switching action, making them easy to operate.

[0041] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment. The control oil circuit of the first hydraulic control valve 5 is connected to the outlet of the oil supply device driven by the first power system, and the control oil circuit of the second hydraulic control valve 6 is connected to the outlet of the oil supply device driven by the second power system; or, the control oil circuit of the first hydraulic control valve 5 is connected to the outlet of the oil supply device driven by the second power system, and the control oil circuit of the second hydraulic control valve 6 is connected to the outlet of the oil supply device driven by the first power system.

[0042] Specifically, when the first power system starts, its oil supply device outputs pressurized oil. Because the first hydraulic control valve 5 controls the oil circuit to connect with it, the first hydraulic control valve 5 opens, and the return oil from the working equipment flows into the first power system's return oil tank via the return oil main pipe 1 and the first return oil branch pipe 2. When the second power system starts, the second hydraulic control valve 6 opens, and the return oil flows into the second power system's return oil tank. This connection ensures that the power and return oil paths correspond, avoiding interference between the return oil from different power systems and ensuring stable and reliable system operation.

[0043] It should be noted that this embodiment does not restrict the oil inlet of the control oil circuit of the first hydraulic control valve 5 and the second hydraulic control valve 6. What is provided here are two connection methods when the oil inlet of the control oil circuit is the hydraulic control system 4 of the roller cone drill itself.

[0044] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment, which also includes: a main drain pipe 9, a first drain branch pipe 10, and a second drain branch pipe 11.

[0045] Specifically, the main drain pipe 9 connects to the drain circuit of the working equipment; the first drain branch pipe connects to the main drain pipe 9, and a third hydraulic control valve 12 is connected to the first drain branch pipe, with its outlet connected to the return oil tank of the first power system; the second drain branch pipe connects to the main drain pipe 9, and a fourth hydraulic control valve 13 is connected to the second drain branch pipe, with its outlet connected to the return oil tank of the second power system; the third hydraulic control valve 12 and the fourth hydraulic control valve 13 are controlled to open and close respectively by the hydraulic control system 4. When the working equipment drains oil, the hydraulic control system 4 can precisely control the third and fourth hydraulic control valves 13 according to the power mode, so that the drained oil flows precisely into the corresponding power system return oil tank, avoiding malfunctions caused by chaotic draining, and improving the reliability and stability of the hydraulic oil system. The coordinated draining and return of oil reduces the accumulation of impurities, reduces the wear of hydraulic components, extends the equipment life, and reduces maintenance costs and downtime.

[0046] It should be noted that the return oil tank of the first power system and the return oil tank of the second system are not shown in the figure. The outlet of the first drain branch pipe 10 in the figure is connected to the drain port 14 of the return oil tank of the first power system, and the outlet of the second drain branch pipe 11 is connected to the drain port 15 of the return oil tank of the second power system.

[0047] It should be noted that the return oil tanks of the first power system and the second system are not shown in the figure. The outlet of the first return oil branch pipe 2 in the figure is connected to the inlet of the first power system return oil tank, and the outlet of the second return oil branch pipe 3 is connected to the inlet of the second power system return oil tank.

[0048] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment, wherein the third hydraulic control valve 12 and the fourth hydraulic control valve 13 are normally closed valves.

[0049] Specifically, under normal conditions, the third hydraulic control valve 12 and the fourth hydraulic control valve 13 are normally closed. Before system startup or during non-drainage operations, these normally closed valves effectively prevent hydraulic oil in the main drain pipe 9 from flowing into the first and second drain branches due to abnormal pressure fluctuations, vibrations, or other unexpected factors. This avoids unnecessary oil leakage, maintains stable pressure within the system, and ensures the normal operation of other hydraulic components. When the corresponding power system starts and oil leakage is required, the hydraulic control system 4 accurately sends a signal to open the corresponding normally closed valve, improving the safety and reliability of the hydraulic oil system, effectively reducing equipment failures caused by uncontrolled oil leakage, and ensuring stable operation of the rotary drill.

[0050] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment, wherein the third hydraulic control valve 12 and the fourth hydraulic control valve 13 are hydraulic control check valves.

[0051] Specifically, the hydraulically controlled check valve effectively prevents the oil in the main drain pipe 9 from flowing back into the first or second drain branch pipe, ensuring that the draining process strictly follows the preset one-way path. When the corresponding power system starts and requires draining, the hydraulic control system 4 provides control pressure to the hydraulically controlled check valve. Under the control pressure, the hydraulically controlled check valve reliably opens, allowing the oil in the main drain pipe 9 to flow smoothly through the first or second drain branch pipe into the return tank of the corresponding first or second power system.

[0052] Furthermore, when the first hydraulic control valve 5 and the second hydraulic control valve 6 are selected as cover cartridge valves, and the third hydraulic control valve 12 and the fourth hydraulic control valve 13 are selected as one-way hydraulic valves, the control oil inlets of the first hydraulic control valve 5 and the fourth hydraulic control valve 13 in the hydraulic oil system are connected in parallel to form the first control group, and the control oil inlets of the second hydraulic control valve 6 and the third hydraulic control valve 12 are connected in parallel to form the second control group. The hydraulic control system 4 provides control oil to different control groups under different power systems.

[0053] First, when the roller cone drill operates using the first power system, the control oil circuit of the hydraulic control system 4 enters the second hydraulic control valve 6 and the third hydraulic control valve 12. Since the second hydraulic control valve 6 is a cover-type cartridge valve, oil enters through the control port and the valve is closed, so the return oil in the return oil main pipe 1 enters the first power system return oil tank connected to the first hydraulic control valve 5. The third hydraulic control valve 12 is a hydraulic control check valve, oil enters through the control port and the valve is open, so the drain oil in the drain oil main pipe enters the first power system drain oil tank connected to the third control valve.

[0054] Correspondingly, when the roller cone drill operates using the second power system, the control oil circuit of the hydraulic control system 4 enters the first hydraulic control valve 5 and the fourth hydraulic control valve 13. Since the first hydraulic control valve 5 is a cover-type cartridge valve with oil entering through the control port and the valve being closed, the return oil in the return oil main pipe 1 enters the second power system return oil tank connected to the second hydraulic control valve 6. The fourth hydraulic control valve 13 is a hydraulic control check valve with oil entering through the control port and the valve being open, so the drain oil in the drain oil main pipe enters the second power system drain oil tank connected to the fourth control valve.

[0055] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment. The control oil circuit of the third hydraulic control valve 12 is connected to the outlet of the oil supply device driven by the first power system, and the control oil circuit of the fourth hydraulic control valve 13 is connected to the outlet of the oil supply device driven by the second power system; or, the control oil circuit of the third hydraulic control valve 12 is connected to the outlet of the oil supply device driven by the second power system, and the control oil circuit of the fourth hydraulic control valve 13 is connected to the outlet of the oil supply device driven by the first power system.

[0056] Specifically, when the first power system starts, its driven oil supply device begins to work and outputs hydraulic oil with a certain pressure. Since the control oil circuit of the third hydraulic control valve 12 is connected to the outlet of the oil supply device, the pressurized oil enters the control chamber of the third hydraulic control valve 12. When the pressure in the control chamber reaches a certain value, it overcomes the spring force of the hydraulic control check valve, causing the third hydraulic control valve 12 to open. At this time, the drain oil in the working equipment drain manifold 9 can flow smoothly into the return oil tank of the first power system through the first drain branch pipe. Similarly, when the second power system starts, the pressurized oil output by its oil supply device will open the fourth hydraulic control valve 13, allowing the drain oil to flow into the return oil tank of the second power system through the second drain branch pipe. This connection method ensures that the drain process closely corresponds to the working state of the power system, ensuring that the drain oil can accurately return to the corresponding return oil tank when each power system is working, guaranteeing the orderliness and stability of the hydraulic oil system drain, avoiding oil mixing between the return oil tanks of different power systems, and improving the reliability of the system.

[0057] It should be noted that this embodiment does not restrict the oil inlet of the control oil circuit of the third hydraulic control valve 12 and the fourth hydraulic control valve 13. What is provided here are two connection methods when the oil inlet of the control oil circuit is the hydraulic control system 4 of the roller cone drill itself.

[0058] like Figure 1 As shown, this is a specific implementation of the hydraulic oil system provided in this embodiment. The hydraulic control system 4 includes: an electromagnetic switching valve, which is connected to the control oil circuits of the first hydraulic control valve 5 and the second hydraulic control valve 6. The electromagnetic switching valve is used to switch the control oil circuits of the first hydraulic control valve 5 and the second hydraulic control valve 6.

[0059] Specifically, the solenoid switching valve is a two-position four-way solenoid valve, which has two working positions, each corresponding to a different oil circuit on / off state. In the hydraulic oil system of the roller cone drill, these two positions correspond to the working modes of the first power system and the second power system, respectively. When the roller cone drill is operating using the first power system, the two-position four-way solenoid valve is energized, placing it in one of the positions. In this position, the solenoid valve connects the control oil circuit of the first hydraulic control valve 5 to the high-pressure oil source, and simultaneously connects the control oil circuit of the second hydraulic control valve 6 to the return port. High-pressure oil enters the control chamber of the first hydraulic control valve 5, pushing the valve core to move, thereby opening the first hydraulic control valve 5; while the second hydraulic control valve 6, because its control oil circuit is connected to the return port, loses pressure, and the valve core closes under the action of spring force or other reset device. The hydraulic oil in the return main pipe 1 then flows into the return oil tank of the first power system through the opened first return branch pipe 2, ensuring smooth oil return when the first power system is operating.

[0060] Furthermore, when switching to the second power system, the two-position four-way solenoid valve is de-energized, causing it to switch to another operating position. In this new position, the solenoid valve connects the control oil circuit of the second hydraulic control valve 6 to the high-pressure oil source, and the control oil circuit of the first hydraulic control valve 5 to the return oil port. Thus, the second hydraulic control valve 6 opens, the first hydraulic control valve 5 closes, and the hydraulic oil in the return oil main 1 flows into the return oil tank of the second power system through the second return oil branch pipe 3, achieving a rapid switch of the return oil path.

[0061] An embodiment of this utility model also provides a roller cone drill.

[0062] Specifically, the rotary drill is equipped with the aforementioned hydraulic oil system. When the rotary drill is operating in a mine, it faces complex and ever-changing working conditions. The dual power system can be flexibly switched according to actual needs. In areas with a stable and sufficient power supply, the motor serves as the power source. Through precise control of the hydraulic oil system, the return and discharge oil from the working equipment flows precisely into the corresponding return oil tank, ensuring the efficient operation of the motor power system, maintaining continuous and stable drilling operations, significantly improving drilling efficiency, and reducing energy consumption.

[0063] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of the present invention.

Claims

1. A hydraulic oil system characterized by, The hydraulic oil system comprises: a return oil main pipe (1) connected with a return oil path of a working device; a first return oil branch pipe (2) connected with the return oil main pipe (1), wherein a first hydraulic control valve (5) is connected to the first return oil branch pipe (2), and an outlet of the first return oil branch pipe (2) is communicated with a return oil tank of a first power system; a second return oil branch pipe (3) connected with the return oil main pipe (1), wherein a second hydraulic control valve (6) is connected to the second return oil branch pipe (3), and an outlet of the second return oil branch pipe (3) is communicated with a return oil tank of a second power system; a hydraulic control system (4) for controlling the first hydraulic control valve (5) and the second hydraulic control valve (6) to open or close.

2. The hydraulic oil system according to claim 1, characterized in that, The first hydraulic control valve (5) and the second hydraulic control valve (6) are normally open valves.

3. The hydraulic oil system according to claim 2, characterized in that, The first hydraulic control valve (5) and the second hydraulic control valve (6) are cover plate plug-in valves.

4. The hydraulic oil system of claim 1, wherein, A control oil path of the first hydraulic control valve (5) is communicated with an outlet of an oil supply device driven by the first power system, and a control oil path of the second hydraulic control valve (6) is communicated with an outlet of an oil supply device driven by the second power system. Alternatively, a control oil path of the first hydraulic control valve (5) is communicated with an outlet of an oil supply device driven by the second power system, and a control oil path of the second hydraulic control valve (6) is communicated with an outlet of an oil supply device driven by the first power system.

5. The hydraulic oil system of claim 1, wherein, Further comprising: a drain oil main pipe (9) connected with a drain oil path of the working device; a first drain oil branch pipe connected with the drain oil main pipe (9), wherein a third hydraulic control valve (12) is connected to the first drain oil branch pipe, and an outlet of the first drain oil branch pipe is communicated with the return oil tank of the first power system; a second drain oil branch pipe connected with the drain oil main pipe (9), wherein a fourth hydraulic control valve (13) is connected to the second drain oil branch pipe, and an outlet of the second drain oil branch pipe is communicated with the return oil tank of the second power system; The third hydraulic control valve (12) and the fourth hydraulic control valve (13) are controlled to open and close by the hydraulic control system (4) respectively.

6. The hydraulic oil system according to claim 5, characterized in that The third hydraulic control valve (12) and the fourth hydraulic control valve (13) are normally closed valves.

7. The hydraulic oil system according to claim 6, characterized in that The third hydraulic control valve (12) and the fourth hydraulic control valve (13) are hydraulic control one-way valves.

8. The hydraulic oil system of claim 5, wherein, A control oil path of the third hydraulic control valve (12) is communicated with an outlet of an oil supply device driven by the first power system, and a control oil path of the fourth hydraulic control valve (13) is communicated with an outlet of an oil supply device driven by the second power system. Alternatively, a control oil path of the third hydraulic control valve (12) is communicated with an outlet of an oil supply device driven by the second power system, and a control oil path of the fourth hydraulic control valve (13) is communicated with an outlet of an oil supply device driven by the first power system.

9. The hydraulic oil system according to any one of claims 1 to 8, characterized in that The hydraulic control system (4) comprises an electromagnetic switching valve connected with control oil paths of the first hydraulic control valve (5) and the second hydraulic control valve (6), and the electromagnetic switching valve is used to switch the control oil paths of the first hydraulic control valve (5) and the second hydraulic control valve (6).

10. A drag bit, comprising: The hydraulic oil system comprises any one of claims 1-9. The hydraulic oil system comprises any one of claims 1-9.

Images