Drill boom hydraulic system of driving and anchoring machine and driving and anchoring machine adopting drill boom hydraulic system

Abstract

The utility model discloses a hydraulic system for a drill boom of a driving and anchoring machine and the driving and anchoring machine adopting the hydraulic system, which are characterized in that the reversing of a first hydraulic control reversing valve and a second hydraulic control reversing valve is controlled by controlling the reversing of a first reversing valve, so that an oil supply path of a swing motor is controlled to be switched between a high-speed action oil path and a low-speed action oil path; when quick hole finding is needed, a quick action oil way is switched to enable the up-down swing motor and the left-right swing motor to be in a high-speed motion state, when low-speed hole aligning is needed, a slow action oil way is switched to, and a throttling valve is arranged on the slow action oil way, so that the motion speed of the swing motors can be reduced, the hole aligning accuracy is improved, and the hole aligning efficiency is improved. Therefore, the hole aligning efficiency and the hole aligning precision are ensured at the same time, and the device has the advantages of simple structure, convenience in operation and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor miners, in particular to a hydraulic system for a drill arm of an anchor miner, and more particularly to an anchor miner adopting the hydraulic system for the drill arm of an anchor miner. Background Art

[0002] Currently, most anchor miners' drill booms use a constant power and load-sensing variable pump system in conjunction with a manually or electrically controlled proportional multi-way valve to control the movements of various actuators. For example, patent CN112049656A discloses a crank-arm anchor miner with random support and a hydraulic control system. This system utilizes a constant power and load-sensing system to control the various movements of the anchor miner's drill boom. During drilling operations, anchor miners typically achieve rapid hole alignment by controlling the vertical and horizontal swing motors to maintain high-speed motion. However, since these motors maintain high speeds, the drill boom moves quickly, making it difficult to adjust the position of the drill boom in a timely manner and thus unable to ensure accurate hole alignment. Furthermore, since the operator's operating platform for the anchor miner's bolt arm is located on the boom, as the boom is raised and lowered, the platform gradually tilts. The operator must also actively operate the leveling cylinder to maintain a level position while the boom is raised. This operating method is cumbersome, inefficient, and unsafe. Furthermore, operators working on the anchor miner's boom, especially when loading and unloading drill rods, can easily accidentally touch the multi-way valve handle with their body or clothing. If this accidentally triggers the anchor boom to lift or yaw, the boom could malfunction and injure the operator. Furthermore, due to structural limitations, the counterbalance valves on some cylinders are not properly seated on the valve seats. Pipes connect the cylinders to the counterbalance valves, and a pipe burst could easily cause the boom to quickly fall or yaw. Utility Model Content

[0003] The utility model provides a hydraulic system for the drill arm of an anchor driller and an anchor driller adopting the same, which can control the up and down swing motor and the left and right swing motor to move at high speed when quickly finding a hole, and control the up and down swing motor and the left and right swing motor to move at low speed when aligning a hole, while ensuring the hole aligning efficiency and hole aligning accuracy.

[0004] According to one aspect of the present invention, a hydraulic system for the drill arm of an anchor miner is provided, comprising a hydraulic pump, a multi-way valve, a first reversing valve, a first hydraulically controlled reversing valve, a second hydraulically controlled reversing valve, a first throttle valve, a second throttle valve, a first balancing valve, a second balancing valve, an up and down swing motor, and a left and right swing motor. The oil outlet of the hydraulic pump is connected to the oil inlet of the multi-way valve, one working oil port of a working link of the multi-way valve is connected to the oil inlet of the first hydraulically controlled reversing valve, and the other working oil port is connected to the first balancing valve, one oil outlet of the first hydraulically controlled reversing valve is directly connected to the first balancing valve, and the other outlet is directly connected to the first balancing valve. The oil port is connected to the first balancing valve through the first throttle valve, the first balancing valve is connected to the up and down swing motor, one working oil port of another working link of the multi-way valve is connected to the oil inlet of the second hydraulically controlled reversing valve, and the other working oil port is connected to the second balancing valve, one oil outlet of the second hydraulically controlled reversing valve is directly connected to the second balancing valve, and the other oil outlet is connected to the second balancing valve through the second throttle valve, the second balancing valve is connected to the left and right swing motor, and the first reversing valve is respectively connected to the low-pressure control oil port of the multi-way valve, the control oil ports of the first hydraulically controlled reversing valve and the second hydraulically controlled reversing valve.

[0005] Furthermore, it also includes an active leveling cylinder and a follower cylinder, the follower cylinder is installed on the drill arm lifting structure, and is used to follow the lifting and lowering action of the drill arm, the first working oil port of a working link of the multi-way valve is connected to the rodless chamber of the active leveling cylinder through the third balancing valve, and the second working oil port is connected to the rod chamber of the active leveling cylinder through the third balancing valve, and the middle position function of the valve core of the working link is a type 0 function, the rodless chamber of the follower cylinder is connected to the first working oil port, and the rod chamber is connected to the second working oil port, and the valve core of the working link is controlled to switch to the middle position when the drill arm performs the lifting and lowering action.

[0006] Furthermore, it also includes a first overflow valve and a second overflow valve, the first overflow valve is connected to the first working oil port and the oil tank respectively, and the second overflow valve is connected to the second working oil port and the oil tank respectively.

[0007] Furthermore, it also includes a first one-way valve, a second one-way valve and a third one-way valve. The oil replenishment source is connected to the first working oil port through the first one-way valve, connected to the second working oil port through the second one-way valve, and connected to the oil tank through the third one-way valve. The oil inlets of the three one-way valves are all connected to the oil replenishment source, and the third one-way valve is used to provide oil replenishment back pressure.

[0008] Furthermore, a first pipeline explosion-proof valve is provided between the third balancing valve and the rodless chamber of the active leveling oil cylinder.

[0009] Furthermore, it also includes a fourth balancing valve and a drill arm telescopic cylinder. One working link of the multi-way valve is connected to the drill arm telescopic cylinder through the fourth balancing valve, and a second pipeline explosion-proof valve is provided between the fourth balancing valve and the rodless chamber of the drill arm telescopic cylinder.

[0010] Furthermore, it also includes a fifth balancing valve, a drill arm sway cylinder, a sixth balancing valve and a drill arm lifting cylinder. One working link of the multi-way valve is connected to the drill arm sway cylinder through the fifth balancing valve, and the other working link is connected to the drill arm lifting cylinder through the sixth balancing valve. The feedback oil ports of the two working links are connected to the oil tank through the second reversing valve.

[0011] Furthermore, it also includes a seventh balancing valve and a propulsion cylinder, and one working link of the multi-way valve is connected to the propulsion cylinder through the seventh balancing valve.

[0012] Furthermore, it also includes an eighth balancing valve and an integral push cylinder, and one working link of the multi-way valve is connected to the integral push cylinder through the eighth balancing valve.

[0013] In addition, the present invention also provides an anchor miner, which adopts the above-mentioned anchor miner drill arm hydraulic system.

[0014] The utility model has the following beneficial effects:

[0015] The hydraulic system of the anchor miner's drill arm of the utility model controls the switching of the first hydraulically controlled reversing valve and the second hydraulically controlled reversing valve by controlling the switching of the first reversing valve, thereby controlling the oil supply circuit of the swing motor to switch between the fast-action oil circuit and the slow-action oil circuit. When it is necessary to find a hole quickly, it switches to the fast-action oil circuit to put the up and down swing motor and the left and right swing motor in a high-speed movement state. When it is necessary to align the hole at a low speed, it switches to the slow-action oil circuit. A throttle valve is provided on the slow-action oil circuit to reduce the movement speed of the swing motor so as to improve the accuracy of hole alignment, thereby ensuring the hole alignment efficiency and hole alignment accuracy at the same time, and has the advantages of simple structure, easy operation and low cost.

[0016] In addition, the anchor miner of the present invention also has the above advantages.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1It is a schematic diagram of the hydraulic principle of the hydraulic system of the anchor drill arm of the preferred embodiment of the present application.

[0020] Description of Reference Numerals

[0021] 1. Hydraulic pump; 2. Multi-way valve; 3. First reversing valve; 4. First hydraulically controlled reversing valve; 5. Second hydraulically controlled reversing valve; 6. First throttle valve; 7. Second throttle valve; 8. First balancing valve; 9. Second balancing valve; 10. Vertical swing motor; 11. Horizontal swing motor; 12. Active leveling cylinder; 13. Follow-up cylinder; 14. Third balancing valve; 15. First relief valve; 16. Second relief valve; 17. First check valve; 18. Second check valve. 19. Third one-way valve; 20. First pipeline explosion-proof valve; 21. Fourth balancing valve; 22. Drill arm telescopic cylinder; 23. Second pipeline explosion-proof valve; 24. Fifth balancing valve; 25. Drill arm sway cylinder; 26. Sixth balancing valve; 27. Drill arm lifting cylinder; 28. Second reversing valve; 29. ​​Seventh balancing valve; 30. Thrust cylinder; 31. Eighth balancing valve; 32. Integral push cylinder; 33. Drilling motor; 34. Third relief valve; 35. Ball valve. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Reference Figure 1The preferred embodiment of the present application provides a hydraulic system for the drill arm of an anchor miner, comprising a hydraulic pump 1, a multi-way valve 2, a first reversing valve 3, a first hydraulically controlled reversing valve 4, a second hydraulically controlled reversing valve 5, a first throttle valve 6, a second throttle valve 7, a first balancing valve 8, a second balancing valve 9, an up-and-down swing motor 10, and a left-and-right swing motor 11. The oil outlet of the hydraulic pump 1 is connected to the oil inlet of the multi-way valve 2, one working oil port of one working link of the multi-way valve 2 is connected to the oil inlet of the first hydraulically controlled reversing valve 4, and the other working oil port is connected to the first balancing valve 8, one oil outlet of the first hydraulically controlled reversing valve 4 is directly connected to the first balancing valve 8, and the other oil outlet is directly connected to the first balancing valve 8. The oil port is connected to the first balancing valve 8 through the first throttle valve 6. The first balancing valve 8 is connected to the up and down swing motor 10. One working oil port of the other working link of the multi-way valve 2 is connected to the oil inlet of the second hydraulically controlled reversing valve 5, and the other working oil port is connected to the second balancing valve 9. One oil outlet of the second hydraulically controlled reversing valve 5 is directly connected to the second balancing valve 9, and the other oil outlet is connected to the second balancing valve 9 through the second throttle valve 7. The second balancing valve 9 is connected to the left and right swing motor 11. The first reversing valve 3 is respectively connected to the low-pressure control oil port of the multi-way valve 2, the control oil ports of the first hydraulically controlled reversing valve 4, and the second hydraulically controlled reversing valve 5. In addition, the oil outlet of the hydraulic pump 1 is also connected to the oil tank through the third relief valve 34, which serves as a safety valve for the hydraulic system.

[0024] Specifically, the oil outlet of the hydraulic pump 1 is connected with the P port of the multi-way valve 2, so as to supply oil to each actuator of the hydraulic system. The A3 port of the third working connection of the multi-way valve 2 is connected with the oil inlet of the first hydraulic control reversing valve 4, the B3 port is connected with the first balance valve 8, one oil outlet of the first hydraulic control reversing valve 4 is directly connected with the first balance valve 8, and the other oil outlet is connected with the first balance valve 8 through the first throttle valve 6. The A4 port of the fourth working connection of the multi-way valve 2 is connected with the oil inlet of the second hydraulic control reversing valve 5, the B4 port is connected with the second balance valve 9, one oil outlet of the second hydraulic control reversing valve 5 is directly connected with the second balance valve 9, and the other oil outlet is connected with the second balance valve 9 through the second throttle valve 7. By controlling the reversing of the first hydraulic control reversing valve 4 and the second hydraulic control reversing valve 5, whether the oil circuit passes through the first throttle valve 6 and the second throttle valve 7 can be controlled, wherein the through flow of the first throttle valve 6 and the second throttle valve 7 is adjustable. The control oil ports of the first hydraulic control reversing valve 4 and the second hydraulic control reversing valve 5 are connected with the first reversing valve 3, and the first reversing valve 3 is connected with the low-pressure control oil port z of the multi-way valve 2. When the drill arm is far away from the hole position and needs to quickly find the hole, the first reversing valve 3 is not controlled to reverse, the low-pressure control oil does not enter the control oil ports of the first hydraulic control reversing valve 4 and the second hydraulic control reversing valve 5, the first hydraulic control reversing valve 4 and the second hydraulic control reversing valve 5 are not controlled to reverse, and the oil provided by the third working connection and the fourth working connection of the multi-way valve 2 does not pass through the first throttle valve 6 and the second throttle valve 7 and enters the up-down swing motor 10 and the left-right swing motor 11 respectively, so that the up-down swing motor 10 and the left-right swing motor 11 are in a high-speed motion state. When the drill arm moves to a position close to the hole position and needs to be aligned with the hole, the first reversing valve 3 is controlled to reverse, the low-pressure control oil enters the control oil ports of the first hydraulic control reversing valve 4 and the second hydraulic control reversing valve 5, the first hydraulic control reversing valve 4 and the second hydraulic control reversing valve 5 are controlled to reverse, and the oil provided by the third working connection and the fourth working connection of the multi-way valve 2 passes through the first throttle valve 6 and the second throttle valve 7 and then enters the up-down swing motor 10 and the left-right swing motor 11 respectively, so that the up-down swing motor 10 and the left-right swing motor 11 are in a low-speed motion state. The position of the drill arm can be adjusted in time during the hole alignment process, so as to accurately align the hole. The first reversing valve 3 can be an electric reversing valve or a manual reversing valve, and a manual reversing valve is preferably used.

[0025] It can be understood that the drilling boom hydraulic system of the anchor excavator of the embodiment controls the switching of the first hydraulic control reversing valve 4 and the second hydraulic control reversing valve 5 by controlling the switching of the first reversing valve 3, thereby controlling the switching of the oil supply oil way of the swing motor between the fast action oil way and the slow action oil way. When fast hole finding is needed, the fast action oil way is switched to, so that the up-down swing motor 10 and the left-right swing motor 11 are in a high-speed motion state. When low-speed hole aligning is needed, the slow action oil way is switched to. The slow action oil way is provided with a throttle valve, which can reduce the motion speed of the swing motor, so as to improve the accuracy of hole aligning, thereby ensuring the hole aligning efficiency and accuracy at the same time, and having the advantages of simple structure, convenient operation and low cost.

[0026] In addition, the drilling boom hydraulic system of the anchor excavator further comprises a main leveling oil cylinder 12 and a follow-up oil cylinder 13. The follow-up oil cylinder 13 is installed on the drilling boom lifting structure and is used for following up according to the lifting action of the drilling boom. The first working oil port of one working connection of the multi-way valve 2 is connected with the rodless cavity of the main leveling oil cylinder 12 through the third balance valve 14, and the second working oil port is connected with the rod cavity of the main leveling oil cylinder 12 through the third balance valve 14. The center position function of the valve core of the working connection is 0 type function. The rodless cavity of the follow-up oil cylinder 13 is connected with the first working oil port, and the rod cavity is connected with the second working oil port. When the drilling boom is lifted, the valve core of the working connection is switched to the center position.

[0027] Specifically, the follow-up oil cylinder 13 is installed on the drilling arm lifting structure to follow up according to the lifting action of the drilling arm, for example, one end of the follow-up oil cylinder 13 is connected to the drilling arm and the other end is connected to the mounting base, when the drilling arm is lifted, the follow-up oil cylinder 13 is passively stretched, and when the drilling arm is lowered, the follow-up oil cylinder 13 is passively retracted. The A6 port of the sixth working joint of the multi-way valve 2 is connected to the rodless chamber of the active leveling oil cylinder 12 through the third balance valve 14, and the B6 port is connected to the rod chamber of the active leveling oil cylinder 12 through the third balance valve 14, the function of the valve core of the sixth joint in the middle position is 0 type function, at the same time, the A6 port is also connected to the rodless chamber of the follow-up oil cylinder 13, and the B6 port is also connected to the rod chamber of the follow-up oil cylinder 13. When automatic leveling needs to be achieved, the valve core of the sixth working joint is switched to the middle position when the drilling arm is lifted, at this time, all ports of the sixth working joint are fully closed. When the drilling arm is lifted, the anchor arm operating platform will be tilted upward, the follow-up oil cylinder 13 is passively stretched, and the oil in the rod chamber of the follow-up oil cylinder 13 is pressed into the rod chamber of the active leveling oil cylinder 12, thereby driving the active leveling oil cylinder 12 to retract, so that the anchor arm operating platform is tilted downward, thereby achieving automatic leveling of the anchor arm operating platform; when the drilling arm is lowered, the anchor arm operating platform will be tilted downward, the follow-up oil cylinder 13 is passively retracted, and the oil in the rodless chamber of the follow-up oil cylinder 13 is pressed into the rodless chamber of the active leveling oil cylinder 12, thereby driving the active leveling oil cylinder 12 to extend, so that the anchor arm operating platform is tilted upward, thereby achieving automatic leveling of the anchor arm operating platform. In addition, when active leveling is needed, the active leveling oil cylinder 12 can be directly driven to extend and retract by controlling the valve core of the sixth working joint to reverse, thereby achieving active leveling of the anchor arm operating platform.

[0028] It can be understood that the drilling and anchoring machine drilling arm hydraulic system achieves automatic leveling of the anchor arm operating platform by adding a follow-up oil cylinder 13 on the drilling arm structure which moves together with the lifting of the drilling arm, and connecting the rodless chamber and the rod chamber of the follow-up oil cylinder 13 to the rodless chamber and the rod chamber of the active leveling oil cylinder 12 through hydraulic pipelines respectively.

[0029] Optionally, the drilling and anchoring machine drilling arm hydraulic system further comprises a first overflow valve 15 and a second overflow valve 16, the first overflow valve 15 is connected to the A6 port and the oil tank respectively, and the second overflow valve 16 is connected to the B6 port and the oil tank respectively. When the active leveling oil cylinder 12 moves to the limit position and the follow-up oil cylinder 13 is still following up, once the oil pressure pressed into the active leveling oil cylinder 12 by the follow-up oil cylinder 13 exceeds the set value, the first overflow valve 15 or the second overflow valve 16 is opened to release pressure, so as to protect the oil cylinder from being damaged and prevent overpressure explosion.

[0030] Optionally, the anchor miner's boom hydraulic system also includes a first one-way valve 17, a second one-way valve 18, and a third one-way valve 19. A replenishing oil source P1 is connected to port A6 via the first one-way valve 17, to port B6 via the second one-way valve 18, and to the fuel tank via the third one-way valve 19. The oil inlets of all three one-way valves are connected to the replenishing oil source, and the third one-way valve 19 provides replenishing back pressure. During automatic leveling, replenishing oil can be provided through the replenishing oil source P1, the first one-way valve 17, and the second one-way valve 18 to prevent cavitation or cylinder vibration caused by air inhalation.

[0031] Optionally, a first pipeline explosion-proof valve 20 is further provided between the third balancing valve 14 and the rodless chamber of the active leveling cylinder 12. Due to structural limitations and other reasons, the third balancing valve 14 is not attached to the valve seat of the active leveling cylinder 12. The two are connected by a pipeline. Once a pipe bursts, it is easy to cause the boom to fall or swing rapidly. Therefore, by providing the first pipeline explosion-proof valve 20 between the third balancing valve 14 and the rodless chamber of the active leveling cylinder 12, if the pipeline is damaged, the oil in the rodless chamber can be quickly locked, and the boom will not fall or swing rapidly, thereby improving safety.

[0032] In addition, the anchor miner's boom hydraulic system also includes a fourth balancing valve 21 and a boom telescopic cylinder 22. One working link of the multi-way valve 2 is connected to the boom telescopic cylinder 22 via the fourth balancing valve 21, and a second pipeline explosion-proof valve 23 is interposed between the fourth balancing valve 21 and the rodless chamber of the boom telescopic cylinder 22. Specifically, port A5 of the fifth working link of the multi-way valve 2 is connected to the rodless chamber of the boom telescopic cylinder 22, while port B5 is connected to the rod chamber of the boom telescopic cylinder 22. The fourth balancing valve 21 is interposed between the fifth working link and the boom telescopic cylinder 22, and a second pipeline explosion-proof valve 23 is interposed between the fourth balancing valve 21 and the rodless chamber of the boom telescopic cylinder 22. Since the fourth balancing valve 21 of the drill arm telescopic cylinder 22 is not attached to the cylinder, the fourth balancing valve 21 and the drill arm telescopic cylinder 22 are connected by a hydraulic hose. Once a pipe bursts, the drill arm will fall quickly, causing a safety accident. Therefore, a second pipeline explosion-proof valve 23 is added to the oil port of the rodless chamber of the cylinder. Once a pipe bursts, the second pipeline explosion-proof valve 23 will close quickly, locking the oil in the rodless chamber of the drill arm telescopic cylinder 22, and keeping the boom from falling.

[0033] In addition, the drill boom hydraulic system of the excavator-anchor machine further comprises a fifth balance valve 24, a boom deflection oil cylinder 25, a sixth balance valve 26 and a boom lifting oil cylinder 27, one working connection of the multi-way valve 2 is connected with the boom deflection oil cylinder 25 through the fifth balance valve 24, and the other working connection is connected with the boom lifting oil cylinder 27 through the sixth balance valve 26, and the feedback oil ports of the two working connections are connected with the oil tank through the second reversing valve 28. Specifically, the eighth working connection of the multi-way valve 2 is connected with the boom deflection oil cylinder 25 through the fifth balance valve 24, the ninth working connection is connected with the boom lifting oil cylinder 27 through the sixth balance valve 26, and the feedback oil ports LS1, LS2, LS3 and LS4 of the two working connections are connected with the oil tank through the second reversing valve 28. When the second reversing valve 28 is not reversed, the control oil LS of the multi-way valve 2 is unloaded, and the system cannot establish pressure, and when the second reversing valve 28 is reversed, the control oil LS of the multi-way valve 2 can establish pressure. Therefore, when the boom deflection is needed, the eighth handle of the multi-way valve 2 and the second reversing valve 28 must be operated at the same time, and when the boom lifting is needed, the ninth handle of the multi-way valve 2 and the second reversing valve 28 must be operated at the same time, so as to avoid the boom from moving due to accidental touch or accidental operation. The second reversing valve 28 can be an electrically controlled reversing valve or a manually controlled reversing valve, and is preferably a manually controlled reversing valve. In addition, the rodless cavity of the boom lifting oil cylinder 27 is also connected with the oil tank through a ball valve 35, and when the machine is in failure and the hydraulic system cannot be operated, the ball valve 35 can be opened to discharge the oil in the rodless cavity, so as to lower the boom and realize the safe evacuation of personnel.

[0034] In addition, the drill boom hydraulic system of the excavator-anchor machine further comprises a fifth balance valve 24, a boom deflection oil cylinder 25, a sixth balance valve 26 and a boom lifting oil cylinder 27, one working connection of the multi-way valve 2 is connected with the boom deflection oil cylinder 25 through the fifth balance valve 24, and the other working connection is connected with the boom lifting oil cylinder 27 through the sixth balance valve 26, and the feedback oil ports of the two working connections are connected with the oil tank through the second reversing valve 28. Specifically, the eighth working connection of the multi-way valve 2 is connected with the boom deflection oil cylinder 25 through the fifth balance valve 24, the ninth working connection is connected with the boom lifting oil cylinder 27 through the sixth balance valve 26, and the feedback oil ports LS1, LS2, LS3 and LS4 of the two working connections are connected with the oil tank through the second reversing valve 28. When the second reversing valve 28 is not reversed, the control oil LS of the multi-way valve 2 is unloaded, and the system cannot establish pressure, and when the second reversing valve 28 is reversed, the control oil LS of the multi-way valve 2 can establish pressure. Therefore, when the boom deflection is needed, the eighth handle of the multi-way valve 2 and the second reversing valve 28 must be operated at the same time, and when the boom lifting is needed, the ninth handle of the multi-way valve 2 and the second reversing valve 28 must be operated at the same time, so as to avoid the boom from moving due to accidental touch or accidental operation. The second reversing valve 28 can be an electrically controlled reversing valve or a manually controlled reversing valve, and is preferably a manually controlled reversing valve. In addition, the rodless cavity of the boom lifting oil cylinder 27 is also connected with the oil tank through a ball valve 35, and when the machine is in failure and the hydraulic system cannot be operated, the ball valve 35 can be opened to discharge the oil in the rodless cavity, so as to lower the boom and realize the safe evacuation of personnel.

[0035] In addition, another embodiment of the present application further provides an excavator-anchor machine, which preferably adopts the drill boom hydraulic system as described above.

[0036] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they understand the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0037] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A hydraulic system for a bolter drill arm, characterized in that: The invention comprises a hydraulic pump (1), a multi-way valve (2), a first reversing valve (3), a first hydraulically controlled reversing valve (4), a second hydraulically controlled reversing valve (5), a first throttle valve (6), a second throttle valve (7), a first balancing valve (8), a second balancing valve (9), an up-and-down swing motor (10), and a left-and-right swing motor (11); the oil outlet of the hydraulic pump (1) is connected to the oil inlet of the multi-way valve (2); one working oil port of a working link of the multi-way valve (2) is connected to the oil inlet of the first hydraulically controlled reversing valve (4), and the other working oil port is connected to the first balancing valve (8); one oil outlet of the first hydraulically controlled reversing valve (4) is directly connected to the first balancing valve (8), and the other oil outlet is connected through the first throttle valve (6). The multi-way valve (2) is connected to a first balancing valve (8), which is connected to an up-and-down swing motor (10). One working oil port of another working link of the multi-way valve (2) is connected to an oil inlet of a second hydraulically controlled reversing valve (5), and another working oil port is connected to a second balancing valve (9). One oil outlet of the second hydraulically controlled reversing valve (5) is directly connected to the second balancing valve (9), and another oil outlet is connected to the second balancing valve (9) through a second throttle valve (7). The second balancing valve (9) is connected to a left-and-right swing motor (11). The first reversing valve (3) is respectively connected to a low-pressure control oil port of the multi-way valve (2), a control oil port of the first hydraulically controlled reversing valve (4), and a control oil port of the second hydraulically controlled reversing valve (5).

2. The anchor miner drill arm hydraulic system according to claim 1, characterized in that: It also includes an active leveling oil cylinder (12) and a follower oil cylinder (13). The follower oil cylinder (13) is installed on the drill arm lifting structure and is used to follow the lifting action of the drill arm. The first working oil port of a working link of the multi-way valve (2) is connected to the rodless chamber of the active leveling oil cylinder (12) through the third balancing valve (14), and the second working oil port is connected to the rod chamber of the active leveling oil cylinder (12) through the third balancing valve (14). The middle position function of the valve core of the working link is a type 0 function. The rodless chamber of the follower oil cylinder (13) is connected to the first working oil port, and the rod chamber is connected to the second working oil port. When the drill arm performs a lifting action, the valve core of the working link is controlled to switch to the middle position.

3. The anchor miner drill arm hydraulic system according to claim 2, characterized in that: It also includes a first overflow valve (15) and a second overflow valve (16), wherein the first overflow valve (15) is connected to the first working oil port and the oil tank respectively, and the second overflow valve (16) is connected to the second working oil port and the oil tank respectively.

4. The anchor miner drill arm hydraulic system according to claim 3, characterized in that: The invention also includes a first one-way valve (17), a second one-way valve (18) and a third one-way valve (19). The oil supply source is connected to the first working oil port through the first one-way valve (17), connected to the second working oil port through the second one-way valve (18), and connected to the oil tank through the third one-way valve (19). The oil inlets of the three one-way valves are all connected to the oil supply source. The third one-way valve (19) is used to provide oil supply back pressure.

5. The anchor miner drill arm hydraulic system according to claim 2, characterized in that: A first pipeline explosion-proof valve (20) is also provided between the third balancing valve (14) and the rodless chamber of the active leveling oil cylinder (12).

6. The anchor miner drill arm hydraulic system according to claim 1, characterized in that: The invention also includes a fourth balancing valve (21) and a drill arm telescopic oil cylinder (22), wherein a working link of the multi-way valve (2) is connected to the drill arm telescopic oil cylinder (22) through the fourth balancing valve (21), and a second pipeline explosion-proof valve (23) is provided between the fourth balancing valve (21) and the rodless chamber of the drill arm telescopic oil cylinder (22).

7. The anchor miner drill arm hydraulic system according to claim 1, characterized in that: The multi-way valve (2) further comprises a fifth balancing valve (24), a drill arm sway oil cylinder (25), a sixth balancing valve (26) and a drill arm lifting oil cylinder (27); one working link of the multi-way valve (2) is connected to the drill arm sway oil cylinder (25) via the fifth balancing valve (24); the other working link is connected to the drill arm lifting oil cylinder (27) via the sixth balancing valve (26); and the feedback oil ports of the two working links are both connected to the oil tank via the second reversing valve (28).

8. The anchor miner drill arm hydraulic system according to claim 1, characterized in that: It also includes a seventh balancing valve (29) and a propulsion oil cylinder (30), and one working link of the multi-way valve (2) is connected to the propulsion oil cylinder (30) through the seventh balancing valve (29).

9. The anchor miner drill arm hydraulic system according to claim 1, characterized in that: It also includes an eighth balancing valve (31) and an integral push oil cylinder (32), and one working link of the multi-way valve (2) is connected to the integral push oil cylinder (32) through the eighth balancing valve (31).

10. An anchor miner, characterized in that: The anchor miner drill arm hydraulic system according to any one of claims 1 to 9 is used.

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