An anchor drill jumbo and its impact hydraulic control system for double rock drills

Abstract

The present application discloses an anchor drill jumbo and its impact hydraulic control system for double rock drills. The impact hydraulic control system for double rock drills includes a hydraulic pump, a multi-way valve, a shuttle valve, a first control reversing valve, a second control reversing valve, an anchor rock drill and a drilling rock drill; the outlet of the hydraulic pump is connected to the anchor rock drill through a first logic valve, the outlet of the hydraulic pump is connected to the drilling rock drill through a second logic valve, the outlet of the hydraulic pump is connected to the inlet of the multi-way valve, the working oil ports of the multi-way valve are connected to the two inlets of the shuttle valve, the outlet of the shuttle valve is connected to the inlet of the first control reversing valve, and the two outlets of the first control reversing valve are respectively connected to the control oil port of the second logic valve and the control oil port of the first logic valve. The above-mentioned impact hydraulic control system for double rock drills reduces hydraulic components, has a compact system structure, is conducive to pipeline layout, is convenient for maintenance, has a simple control system, is simple and convenient to operate, and greatly improves the construction efficiency.

Description

Technical Field

[0001] The present application relates to the field of hydraulic control technology, and in particular to a double rock drill impact hydraulic control system. The present application also relates to an anchor trolley having the double rock drill impact hydraulic control system. Background Art

[0002] The anchor trolley is a key equipment in the anchor support construction. In the current anchor support construction, a single-arm anchor trolley is often used for anchor support. One type of anchor trolley is only equipped with a rock drill, and the drill rod and the anchor rod are switched through a switching device to achieve the purpose of drilling holes and installing anchor rods by the rock drill; another type of anchor trolley is a drilling rock drill and an anchor rock drill installed on a propulsion beam at the same time. The two do not work at the same time. When working, the switching function is used to make one rock drill drill holes and the other rock drill install anchor rods. However, due to the dual rock drill impact hydraulic control system of the existing anchor trolley, the rock drill impact control system it is equipped with is two sets of impact control systems, which increases the cost of the hydraulic system of the entire anchor trolley, which is not conducive to the promotion of support mechanization. At the same time, the two systems have many hydraulic components and occupy a large space, which is not conducive to the layout of hydraulic pipelines and is not convenient for the lightweight design of the anchor trolley. In addition, due to the numerous operating levers on the operating table and the complicated operation, the construction efficiency is greatly reduced. Therefore, as the requirements for anchor support construction become increasingly higher, it is necessary for technical personnel in this field to provide a double rock drill impact hydraulic control system that has a compact structure, simple and convenient operation, and low cost in a timely manner. Summary of the invention

[0003] The purpose of the present application is to provide a double rock drill impact hydraulic control system, which can reduce hydraulic components and simplify the structure, thereby facilitating the layout of hydraulic pipelines, facilitating maintenance and reducing costs. Another purpose of the present application is to provide an anchor trolley including the above double rock drill impact hydraulic control system.

[0004] To achieve the above-mentioned purpose, the present application provides a dual rock drill impact hydraulic control system, including a hydraulic pump, a multi-way valve, a shuttle valve, a first control reversing valve, a second control reversing valve, an anchor rock drill and a drilling rock drill;

[0005] The output port of the hydraulic pump is connected to the bolt rock drill through a first logic valve, the output port of the hydraulic pump is connected to the drilling rock drill through a second logic valve, the output port of the hydraulic pump is connected to the oil inlet of the multi-way valve, the working oil port of the multi-way valve is connected to the two oil inlets of the shuttle valve, the oil outlet of the shuttle valve is connected to the oil inlet of the first control reversing valve, and the two oil outlets of the first control reversing valve are respectively connected to the control oil port of the second logic valve and the control oil port of the first logic valve;

[0006] When the multi-way valve is in the first working position, both the first logic valve and the second logic valve are closed, and both the bolt rock drill and the drilling rock drill stop working;

[0007] When the drilling rock drill is working, the second control reversing valve does not act, the control oil port of the first control reversing valve is connected to the oil tank through the B port and the T port of the second control reversing valve, the first control reversing valve is in the right working position, and the control oil port of the first logic valve is connected to the oil tank through the B port and the T port of the first control reversing valve. The first logic valve is closed. When the multi-way valve is in the second or third working position, the hydraulic oil enters the control oil port of the second logic valve through the shuttle valve and the P port and the A port of the first control reversing valve, and the second logic valve opens, and the drilling rock drill is in the hole-opening or rock-drilling mode;

[0008] When the bolt rock drill is working, the second control reversing valve acts, and the hydraulic oil enters the control oil port of the first control reversing valve through the P port and the B port of the second control reversing valve, so that the first control reversing valve is in the left working position, and the control oil port of the second logic valve is connected to the oil tank through the A port and the T port of the first control reversing valve. The second logic valve is closed. When the multi-way valve is in the second or third working position, the hydraulic oil enters the control oil port of the first logic valve through the shuttle valve and the P port and the B port of the first control reversing valve, and the first logic valve opens, and the bolt rock drill is in the mode of impacting the bolt.

[0009] Optionally, the control chamber of the hydraulic pump is also connected to a first overflow valve, a third overflow valve and a fourth overflow valve arranged in parallel. The set pressure of the first overflow valve is greater than the set pressures of the third overflow valve and the fourth overflow valve, and the set pressure of the third overflow valve is greater than the set pressure of the fourth overflow valve;

[0010] A first hydraulic control reversing valve is provided between the hydraulic pump and the fourth overflow valve, a second hydraulic control reversing valve is provided between the hydraulic pump and the third overflow valve, the K port of the system is connected to the control oil port of the first hydraulic control reversing valve, and the oil outlet of the second logic valve is connected to the control oil port of the second hydraulic control reversing valve;

[0011] When the multi-way valve is in the first working position, the second logic valve is closed, the second hydraulic control reversing valve is in the right working position, and the first overflow valve controls the outlet pressure of the hydraulic pump;

[0012] When the drilling and rock - drilling machine works, the second control reversing valve does not act. When the multi - way valve is in the second working position, the second logic valve opens, the first hydraulic control reversing valve is in the right working position, the second hydraulic control reversing valve is in the left working position, the fourth relief valve controls the outlet pressure of the hydraulic pump, and the drilling and rock - drilling machine works with the first impact pressure.

[0013] When the drilling and rock - drilling machine works, the second control reversing valve does not act. When the multi - way valve is in the third working position, the second logic valve opens, the first hydraulic control reversing valve is in the left working position, the second hydraulic control reversing valve is in the left working position, the third relief valve controls the outlet pressure of the hydraulic pump, and the drilling and rock - drilling machine works with the second impact pressure.

[0014] Optionally, the control chamber of the hydraulic pump is also connected to a second relief valve. The second relief valve is arranged in parallel with the first relief valve, and the set pressure of the first relief valve is greater than the set pressure of the second relief valve.

[0015] A third hydraulic control reversing valve is arranged between the hydraulic pump and the second relief valve. The oil outlet of the first logic valve is connected to the control oil port of the third hydraulic control reversing valve.

[0016] When the bolt rock - drilling machine works, the second control reversing valve acts. When the multi - way valve is in the second working position or the third working position, the first logic valve opens, the third hydraulic control reversing valve is in the left working position, the second relief valve controls the outlet pressure of the hydraulic pump, and the bolt rock - drilling machine outputs a matching impact pressure.

[0017] Optionally, the first hydraulic control reversing valve, the second hydraulic control reversing valve and the third hydraulic control reversing valve are all two - position three - way hydraulic control reversing valves.

[0018] Optionally, the multi - way valve is specifically a manual three - position four - way reversing valve. When the manual three - position four - way reversing valve is in the first working position, the hydraulic pump and the shuttle valve are isolated. When the manual three - position four - way reversing valve is in the second working position, the hydraulic oil output by the hydraulic pump can enter the first oil inlet of the shuttle valve. When the manual three - position four - way reversing valve is in the third working position, the hydraulic oil output by the hydraulic pump can enter the second oil inlet of the shuttle valve.

[0019] Optionally, a check valve is arranged between the manual three - position four - way reversing valve and the hydraulic pump.

[0020] Optionally, a damping is arranged between the output port of the hydraulic pump and the control chamber of the hydraulic pump.

[0021] Optionally, the first control reversing valve is specifically a two - position four - way hydraulic control reversing valve.

[0022] Optionally, the second control reversing valve is specifically a two-position four-way reversing valve.

[0023] This application also provides a bolt jumbo, which includes the double rock drill impact hydraulic control system described in any one of the above.

[0024] Compared with the above background art, the double rock drill impact hydraulic control system provided by the embodiments of this application includes a hydraulic pump, a multi-way valve, a shuttle valve, a first control reversing valve, a second control reversing valve, a bolt rock drill, and a drilling rock drill; wherein, the outlet of the hydraulic pump is connected to the bolt rock drill through a first logic valve, the outlet of the hydraulic pump is connected to the drilling rock drill through a second logic valve, the outlet of the hydraulic pump is connected to the inlet of the multi-way valve, the working oil ports of the multi-way valve are connected to the two inlets of the shuttle valve, the outlet of the shuttle valve is connected to the inlet of the first control reversing valve, and the two outlets of the first control reversing valve are respectively connected to the control oil ports of the second logic valve and the first logic valve. In this way:

[0025] When the multi-way valve is in the first working position, both the first logic valve and the second logic valve are closed, and both the bolt rock drill and the drilling rock drill stop working.

[0026] When the drilling rock drill is working, the second control reversing valve does not act, the control oil port of the first control reversing valve is connected to the oil tank through the B port and T port of the second control reversing valve, the first control reversing valve is in the right working position, and the control oil port of the first logic valve is connected to the oil tank through the B port and T port of the first control reversing valve, and the first logic valve is closed. At this time, when the multi-way valve is in the second working position or the third working position, the hydraulic oil enters the control oil port of the second logic valve through the shuttle valve and the P port and A port of the first control reversing valve, and the second logic valve opens, and the drilling rock drill is in the hole-opening or rock-drilling mode.

[0027] When the bolt rock drill is working, the second control reversing valve acts, and the hydraulic oil enters the control oil port of the first control reversing valve through the P port and B port of the second control reversing valve, so that the first control reversing valve is in the left working position, and the control oil port of the second logic valve is connected to the oil tank through the A port and T port of the first control reversing valve, and the second logic valve is closed. At this time, when the multi-way valve is in the second working position or the third working position, the hydraulic oil enters the control oil port of the first logic valve through the shuttle valve and the P port and B port of the first control reversing valve, and the first logic valve opens, and the bolt rock drill is in the mode of impacting the bolt.

[0028] The multi-way valve of the impact hydraulic control system of the double rock drill provided by the embodiment of the present application has corresponding positioning functions and can be locked in three different positions. Among them, the first working position is the stop working position, and the second and third working positions are used to perform hole-opening control and rock drilling control in different states, which is convenient and smooth to operate. At the same time, two-way logic valves, namely the first logic valve and the second logic valve, are used to connect the bolt rock drill and the drilling rock drill respectively, so that they do not interfere with each other during rock drilling and drilling operations, which can ensure the stability and reliability of the work. In addition, compared with the rock drill impact control systems equipped in the existing bolt jumbo's double rock drill impact hydraulic control system, which are two independent control systems, the double rock drill impact hydraulic control system provided by the embodiment of the present application uses the second control reversing valve to control the first control reversing valve to reverse, so as to switch the work of the drilling rock drill and the bolt rock drill to meet different work requirements. This system also reduces hydraulic components, has a compact system structure, is conducive to pipeline layout, is convenient for maintenance, has a simple control system, is simple and convenient to operate, and greatly improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0030] Figure 1 It is the hydraulic schematic diagram of the double rock drill impact hydraulic control system in the embodiment of the present application.

[0031] Wherein:

[0032] 1 - Motor, 2 - Hydraulic pump, 3 - Damper, 4 - First overflow valve, 5 - Second overflow valve, 6 - Third overflow valve, 7 - Fourth overflow valve, 8 - First hydraulic control reversing valve, 9 - Second hydraulic control reversing valve, 10 - Third hydraulic control reversing valve, 11 - Check valve, 12 - Multi-way valve, 13 - Shuttle valve, 14 - First logic valve, 15 - Second logic valve, 16 - First control reversing valve, 17 - Second control reversing valve, 18 - Bolt rock drill, 19 - Drilling rock drill, 20 - Oil tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0034] To enable those skilled in the art of this technology to better understand the solution of this application, the following further detailed description of this application will be given in conjunction with the accompanying drawings and specific embodiments.

[0035] Please refer to Figure 1 , Figure 1 which is the hydraulic schematic diagram of the impact hydraulic control system of the double rock drill in the embodiment of this application.

[0036] The impact hydraulic control system of the double rock drill provided by the embodiment of this application includes a hydraulic pump 2, a multi-way valve 12, a shuttle valve 13, a first control reversing valve 16, a second control reversing valve 17, an anchor rock drill 18 and a drilling rock drill 19.

[0037] Among them, the outlet of the hydraulic pump 2 is connected to the anchor rock drill 18 through the first logic valve 14, the outlet of the hydraulic pump 2 is connected to the drilling rock drill 19 through the second logic valve 15. The function of the first logic valve 14 is to control the opening and closing of the main oil circuit of the anchor impact, and realize the start and stop of the anchor rock drill 18. The function of the second logic valve 15 is to control the opening and closing of the main oil circuit of the drilling impact, and realize the start and stop of the drilling rock drill 19. The function of the first control reversing valve 16 is to control the opening and closing of the first logic valve 14 and the second logic valve 15. The function of the second control reversing valve 17 is to switch the work of the drilling rock drill 19 and the anchor rock drill 18.

[0038] Specifically, the hydraulic pump 2 is driven by a motor 1. The outlet of the hydraulic pump 2 is connected to the inlet of the multi-way valve 12. The return port T of the multi-way valve 12 is connected to the oil tank 20. One working oil port of the multi-way valve 12 is connected to one inlet of the shuttle valve 13, and the other working oil port of the multi-way valve 12 is connected to the other inlet of the shuttle valve 13.

[0039] To improve the safety of the system, a check valve 11 can also be provided between the multi-way valve 12 and the hydraulic pump 2. The function of the check valve 11 is to prevent the oil from flowing back and protect the hydraulic pump 2.

[0040] Furthermore, the outlet of the shuttle valve 13 is connected to the inlet port P of the first control reversing valve 16. The outlet port A of the first control reversing valve 16 is connected to the control oil port of the second logic valve 15. The outlet port B of the first control reversing valve 16 is connected to the control oil port of the first logic valve 14. The return port T of the first control reversing valve 16 is connected to the oil tank 20. The control oil port of the first control reversing valve 16 is connected to the oil tank 20 through the B port and the T port of the second control reversing valve 17. In this way:

[0041] When the multi-way valve 12 is in the first working position, both the first logic valve 14 and the second logic valve 15 are closed, and both the anchor rock drill 18 and the drilling rock drill 19 stop working.

[0042] When the drilling rock drill 19 is working, the second control reversing valve 17 does not act. The control oil port of the first control reversing valve 16 is connected to the oil tank 20 through the B port and T port of the second control reversing valve 17. The first control reversing valve 16 is in the right working position, and the control oil port of the first logic valve 14 is connected to the oil tank 20 through the B port and T port of the first control reversing valve 16. The first logic valve 14 is closed under the action of the spring. At this time, when the multi-way valve 12 is in the second working position or the third working position, the hydraulic oil at the output port of the hydraulic pump 2 passes through the check valve 11 and the multi-way valve 12 to reach the shuttle valve 13, and then through the oil outlet of the shuttle valve 13, the P port and A port of the first control reversing valve 16 to enter the control oil port of the second logic valve 15, opening the second logic valve 15. Then, the high-pressure oil of the hydraulic pump 2 passes through the second logic valve 15 to reach the drilling rock drill 19, and the drilling rock drill 19 starts to impact. The drilling rock drill 19 is in the hole-opening or rock-drilling mode.

[0043] When the bolt rock drill 18 is working, the second control reversing valve 17 acts. The high-pressure oil at the output port of the hydraulic pump 2 enters the control oil port of the first control reversing valve 16 through the P port and B port of the second control reversing valve 17, so that the first control reversing valve 16 is in the left working position, and the control oil port of the second logic valve 15 is connected to the oil tank 20 through the A port and T port of the first control reversing valve 16. The second logic valve 15 is closed under the action of the spring. At this time, when the multi-way valve 12 is in the second working position or the third working position, the high-pressure oil at the output port of the hydraulic pump 2 passes through the check valve 11 and the multi-way valve 12 to reach the shuttle valve 13, and then through the oil outlet of the shuttle valve 13, the P port and B port of the first control reversing valve 16 to enter the control oil port of the first logic valve 14, opening the first logic valve 14. Then, the high-pressure oil of the hydraulic pump 2 passes through the first logic valve 14 to reach the bolt rock drill 18, and the bolt rock drill 18 starts to impact. The bolt rock drill 18 is in the mode of impacting the bolt.

[0044] Of course, according to actual needs, the first control reversing valve 16 is specifically a two-position four-way hydraulic control reversing valve, and the second control reversing valve 17 is specifically a two-position four-way reversing valve (two-position four-way electromagnetic reversing valve). The so-called non-action of the second control reversing valve 17 means that the two-position four-way reversing valve is not powered on, and the second control reversing valve 17 is in the right working position. The so-called action of the second control reversing valve 17 means that the two-position four-way reversing valve is powered on, and the second control reversing valve 17 switches to the left working position.

[0045] The above multi-way valve 12 is specifically a manual three-position four-way reversing valve. When the manual three-position four-way reversing valve is in the first working position, the hydraulic pump 2 and the shuttle valve 13 are isolated. When the manual three-position four-way reversing valve is in the second working position, the hydraulic oil output by the hydraulic pump 2 can enter the first oil inlet of the shuttle valve 13. When the manual three-position four-way reversing valve is in the third working position, the hydraulic oil output by the hydraulic pump 2 can enter the second oil inlet of the shuttle valve 13.

[0046] In this embodiment, in order to enable the drilling rock drill 19 to impact with different pressures during drilling work, the control chamber X of the hydraulic pump 2 is also connected to the first overflow valve 4, the third overflow valve 6, and the fourth overflow valve 7. The first overflow valve 4, the third overflow valve 6, and the fourth overflow valve 7 are arranged in parallel, and the set pressure of the first overflow valve 4 is greater than the set pressures of the third overflow valve 6 and the fourth overflow valve 7. The set pressure of the third overflow valve 6 is greater than the set pressure of the fourth overflow valve 7. At the same time, in order to facilitate the work of the bolt rock drill 18 to match the preset pressure, the control chamber X of the hydraulic pump 2 is also connected to the second overflow valve 5. The second overflow valve 5 is arranged in parallel with the first overflow valve 4, and the set pressure of the first overflow valve 4 is greater than the set pressure of the second overflow valve 5.

[0047] It should be noted that the function of the first overflow valve 4 is to provide a constant pressure for the system standby. The function of the second overflow valve 5 is to provide a constant pressure for the impact state of the bolt rock drill 18. The function of the third overflow valve 6 is to provide a constant pressure for the high-impact state of the drilling rock drill 19. The function of the fourth overflow valve 7 is to provide a constant pressure for the low-impact state of the drilling rock drill 19.

[0048] In addition, a first hydraulic control reversing valve 8 is provided between the hydraulic pump 2 and the fourth overflow valve 7, and a second hydraulic control reversing valve 9 is provided between the hydraulic pump 2 and the third overflow valve 6. The K port of the system is connected to the control oil port of the first hydraulic control reversing valve 8. The oil outlet of the second logic valve 15 is connected to the control oil port of the second hydraulic control reversing valve 9. A third hydraulic control reversing valve 10 is provided between the hydraulic pump 2 and the second overflow valve 5, and the oil outlet of the first logic valve 14 is connected to the control oil port of the third hydraulic control reversing valve 10.

[0049] In this embodiment, the first hydraulic control reversing valve 8, the second hydraulic control reversing valve 9, and the third hydraulic control reversing valve 10 are all two-position three-way hydraulic control reversing valves. The function of the first hydraulic control reversing valve 8 is to switch the high and low impact pressures. The function of the second hydraulic control reversing valve 9 is to switch the system standby and the drilling rock drill action state pressures. The function of the third hydraulic control reversing valve 10 is to switch the system standby and the bolt rock drill action state pressures. In this way:

[0050] When the multi-way valve 12 is in the first working position, both the first logic valve 14 and the second logic valve 15 are closed, and the control chambers of the second hydraulic control reversing valve 9 and the third hydraulic control reversing valve 10 have no pressure and are both in the normal position, that is, the right working position. At this time, the outlet pressure of the hydraulic pump 2 is controlled by the first overflow valve 4.

[0051] When the drilling and rock - drilling machine 19 is working, the second control reversing valve 17 does not act. The first control reversing valve 16 is in the right working position, and the first logic valve 14 is closed. When the multi - way valve 12 is in the second working position, the K port of the system automatically matches the low propulsion pressure. This pressure cannot overcome the spring force of the first hydraulic control reversing valve 8, so the first hydraulic control reversing valve 8 is located in the right working position. At the same time, the hydraulic oil at the outlet of the hydraulic pump 2 passes through the check valve 11, the multi - way valve 12 and reaches the first oil inlet of the shuttle valve 13. Then, it passes through the outlet of the shuttle valve 13, the P port and the A port of the first control reversing valve 16 and enters the control oil port of the second logic valve 15, opening the second logic valve 15. Since the outlet of the second logic valve 15 is connected to the control oil port of the second hydraulic control reversing valve 9, the second hydraulic control reversing valve 9 is in the left working position. At this time, the first overflow valve 4, the third overflow valve 6 and the fourth overflow valve 7 are in parallel. The set pressure of the fourth overflow valve 7 is fed back to the control chamber X of the hydraulic pump 2 and determines the output pressure of the hydraulic pump 2, that is, the outlet pressure of the hydraulic pump 2 is controlled by the fourth overflow valve 7, and the drilling and rock - drilling machine 19 works with the first impact pressure. When the multi - way valve 12 is in the third working position, the K port of the system automatically matches the high propulsion pressure. This pressure overcomes the spring force of the first hydraulic control reversing valve 8, making the first hydraulic control reversing valve 8 located in the left working position. At the same time, the hydraulic oil at the outlet of the hydraulic pump 2 passes through the check valve 11, the multi - way valve 12 and reaches the second oil inlet of the shuttle valve 13. Then, it passes through the outlet of the shuttle valve 13, the P port and the A port of the first control reversing valve 16 and enters the control oil port of the second logic valve 15, opening the second logic valve 15. Since the outlet of the second logic valve 15 is connected to the control oil port of the second hydraulic control reversing valve 9, the second hydraulic control reversing valve 9 is in the left working position. At this time, only the first overflow valve 4 and the third overflow valve 6 are in parallel. The set pressure of the third overflow valve 6 is fed back to the control chamber X of the hydraulic pump 2 and determines the output pressure of the hydraulic pump 2, that is, the outlet pressure of the hydraulic pump 2 is controlled by the third overflow valve 6, and the drilling and rock - drilling machine 19 works with the second impact pressure.

[0052] Obviously, the second impact pressure is greater than the first impact pressure.

[0053] When the rock bolt drifter 18 is working, the second control directional valve 17 acts, the first control directional valve 16 is in the left working position, and the second logic valve 15 is closed. When the multi-way valve 12 is in the second working position, the high-pressure oil at the outlet of the hydraulic pump 2 passes through the check valve 11 and the multi-way valve 12 to reach the first oil inlet of the shuttle valve 13. Then, after passing through the oil outlet of the shuttle valve 13 and the P and B ports of the first control directional valve 16, it enters the control oil port of the first logic valve 14, opening the first logic valve 14. At this time, the high-pressure oil of the hydraulic pump 2 passes through the first logic valve 14 to reach the rock bolt drifter 18, and the rock bolt drifter 18 starts to impact. Since the oil outlet of the first logic valve 14 is also connected to the control oil port of the third hydraulic control directional valve 10, the third hydraulic control directional valve 10 is in the left working position. At this time, the second logic valve 15 is closed, and the second hydraulic control directional valve 9 is in the right working position. Then, the first relief valve 4 and the second relief valve 5 are in parallel, and the outlet pressure of the hydraulic pump 2 is determined by the second relief valve 5, and the rock bolt drifter 18 outputs a matching impact pressure. When the multi-way valve 12 is in the third working position, the high-pressure oil at the outlet of the hydraulic pump 2 passes through the check valve 11 and the multi-way valve 12 to reach the second oil inlet of the shuttle valve 13. Then, after passing through the oil outlet of the shuttle valve 13 and the P and B ports of the first control directional valve 16, it enters the control oil port of the first logic valve 14, opening the first logic valve 14. At this time, the high-pressure oil of the hydraulic pump 2 passes through the first logic valve 14 to reach the rock bolt drifter 18, and the rock bolt drifter 18 starts to impact. Since the oil outlet of the first logic valve 14 is also connected to the control oil port of the third hydraulic control directional valve 10, the third hydraulic control directional valve 10 is in the left working position. At this time, the second logic valve 15 is closed, and the second hydraulic control directional valve 9 is in the right working position. Then, the first relief valve 4 and the second relief valve 5 are in parallel, and the outlet pressure of the hydraulic pump 2 is determined by the second relief valve 5, and the rock bolt drifter 18 outputs a matching impact pressure.

[0054] That is to say, when switching to the operation of the rock bolt drifter 18, regardless of whether it is a high or low propulsion force, the impact pressure is the same. This impact force plays an auxiliary role in installing the slotted rock bolt. That is, when pushing the slotted rock bolt, if the resistance is too large and it is difficult to push, the impact can be turned on to facilitate the quick installation of the rock bolt.

[0055] In order to reduce the influence of the pressure generated by load fluctuations, a damper 3 is provided between the outlet of the hydraulic pump 2 and the control chamber X of the hydraulic pump 2.

[0056] In summary, the multi-way valve 12 of the double drifter impact hydraulic control system provided by the embodiment of the present application has corresponding positioning functions and can be locked in three different positions. Among them, the first working position is the stop working position, and the second and third working positions are used to perform hole-opening control and rock drilling control in different states, with convenient and smooth operation. At the same time, two-way logic valves, namely the first logic valve 14 and the second logic valve 15, are used to connect the rock bolt drifter 18 and the drill drifter 19 respectively, without interference during rock drilling and hole drilling operations, which can ensure the stability and reliability of the work.

[0057] In addition, compared with the rock drill impact control systems equipped in the impact hydraulic control systems of existing bolter jumbos, which are two independent control systems, the double-rock-drill impact hydraulic control system provided in the embodiments of the present application uses the second control reversing valve 17 to control the reversing of the first control reversing valve 16, so as to switch the operations of the drill jumbo 19 and the bolt drill 18 to meet different working requirements. This system also reduces hydraulic components, has a compact structure, is conducive to pipeline layout, is convenient for maintenance, has a simple control system, and is simple and convenient to operate, greatly improving the construction efficiency.

[0058] A bolter jumbo provided by the present application includes the double-rock-drill impact hydraulic control system described in the above specific embodiments; other parts of the bolter jumbo can refer to the prior art and will not be elaborated herein.

[0059] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0060] The above has introduced in detail the bolter jumbo and its double-rock-drill impact hydraulic control system provided by the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the solution and its core idea of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A double rock drill impact hydraulic control system, characterized in that, It includes a hydraulic pump (2), a multi-way valve (12), a shuttle valve (13), a first control reversing valve (16), a second control reversing valve (17), an anchor rock drill (18) and a drilling rock drill (19); The outlet of the hydraulic pump (2) is connected to the anchor rock drill (18) through a first logic valve (14), the outlet of the hydraulic pump (2) is connected to the drilling rock drill (19) through a second logic valve (15), the outlet of the hydraulic pump (2) is connected to the inlet of the multi-way valve (12), the working ports of the multi-way valve (12) are connected to the two inlets of the shuttle valve (13), the outlet of the shuttle valve (13) is connected to the inlet of the first control reversing valve (16), and the two outlets of the first control reversing valve (16) are respectively connected to the control ports of the second logic valve (15) and the first logic valve (14); When the multi-way valve (12) is in the first working position, both the first logic valve (14) and the second logic valve (15) are closed, and both the anchor rock drill (18) and the drilling rock drill (19) stop working; When the drilling rock drill (19) is working, the second control reversing valve (17) does not act, the control port of the first control reversing valve (16) is connected to the oil tank (20) through the B port and T port of the second control reversing valve (17), the first control reversing valve (16) is in the right working position, and the control port of the first logic valve (14) is connected to the oil tank (20) through the B port and T port of the first control reversing valve (16), the first logic valve (14) is closed. When the multi-way valve (12) is in the second or third working position, the hydraulic oil enters the control port of the second logic valve (15) through the shuttle valve (13) and the P port and A port of the first control reversing valve (16), the second logic valve (15) opens, and the drilling rock drill (19) is in the hole-opening or rock-drilling mode; When the anchor rock drill (18) is working, the second control reversing valve (17) acts, the hydraulic oil enters the control port of the first control reversing valve (16) through the P port and B port of the second control reversing valve (17), so that the first control reversing valve (16) is in the left working position, and the control port of the second logic valve (15) is connected to the oil tank (20) through the A port and T port of the first control reversing valve (16), the second logic valve (15) is closed. When the multi-way valve (12) is in the second or third working position, the hydraulic oil enters the control port of the first logic valve (14) through the shuttle valve (13) and the P port and B port of the first control reversing valve (16), the first logic valve (14) opens, and the anchor rock drill (18) is in the mode of impacting the anchor.

2. The impact hydraulic control system of the double rock drill according to claim 1, characterized in that The control chamber of the hydraulic pump (2) is also connected to a first relief valve (4), a third relief valve (6), and a fourth relief valve (7) that are arranged in parallel. The set pressure of the first relief valve (4) is greater than the set pressures of the third relief valve (6) and the fourth relief valve (7), and the set pressure of the third relief valve (6) is greater than the set pressure of the fourth relief valve (7). A first hydraulically controlled directional valve (8) is provided between the hydraulic pump (2) and the fourth relief valve (7), and a second hydraulically controlled directional valve (9) is provided between the hydraulic pump (2) and the third relief valve (6). The K port of the system is connected to the control oil port of the first hydraulically controlled directional valve (8), and the oil outlet of the second logic valve (15) is connected to the control oil port of the second hydraulically controlled directional valve (9). When the multi-way valve (12) is in the first working position, the second logic valve (15) is closed, the second hydraulically controlled directional valve (9) is in the right working position, and the first relief valve (4) controls the outlet pressure of the hydraulic pump (2). When the drilling and rock drilling machine (19) is working and the second control directional valve (17) does not act, when the multi-way valve (12) is in the second working position, the second logic valve (15) is opened, the first hydraulically controlled directional valve (8) is in the right working position, the second hydraulically controlled directional valve (9) is in the left working position, the fourth relief valve (7) controls the outlet pressure of the hydraulic pump (2), and the drilling and rock drilling machine (19) works with a first impact pressure. When the drilling and rock drilling machine (19) is working and the second control directional valve (17) does not act, when the multi-way valve (12) is in the third working position, the second logic valve (15) is opened, the first hydraulically controlled directional valve (8) is in the left working position, the second hydraulically controlled directional valve (9) is in the left working position, the third relief valve (6) controls the outlet pressure of the hydraulic pump (2), and the drilling and rock drilling machine (19) works with a second impact pressure.

3. The impact hydraulic control system of the double rock drill according to claim 2, characterized in that, The control chamber of the hydraulic pump (2) is also connected to a second relief valve (5). The second relief valve (5) is arranged in parallel with the first relief valve (4), and the set pressure of the first relief valve (4) is greater than the set pressure of the second relief valve (5). A third hydraulically controlled directional valve (10) is provided between the hydraulic pump (2) and the second relief valve (5), and the oil outlet of the first logic valve (14) is connected to the control oil port of the third hydraulically controlled directional valve (10). When the bolt drilling and rock drilling machine (18) is working and the second control directional valve (17) acts, when the multi-way valve (12) is in the second working position or the third working position, the first logic valve (14) is opened, the third hydraulically controlled directional valve (10) is in the left working position, the second relief valve (5) controls the outlet pressure of the hydraulic pump (2), and the bolt drilling and rock drilling machine (18) outputs a matching impact pressure.

4. The impact hydraulic control system of the double rock drill according to claim 3, characterized in that, The first hydraulically controlled directional valve (8), the second hydraulically controlled directional valve (9), and the third hydraulically controlled directional valve (10) are all two-position three-way hydraulically controlled directional valves.

5. The impact hydraulic control system of the double rock drill according to any one of claims 1-4, characterized in that, The multi-way valve (12) is specifically a manual three-position four-way directional control valve. When the manual three-position four-way directional control valve is in the first working position, the hydraulic pump (2) and the shuttle valve (13) are isolated. When the manual three-position four-way directional control valve is in the second working position, the hydraulic oil output by the hydraulic pump (2) can enter the first oil inlet of the shuttle valve (13). When the manual three-position four-way directional control valve is in the third working position, the hydraulic oil output by the hydraulic pump (2) can enter the second oil inlet of the shuttle valve (13).

6. The impact hydraulic control system of the double rock drill according to claim 5, characterized in that, A check valve (11) is provided between the manual three-position four-way directional control valve and the hydraulic pump (2).

7. The impact hydraulic control system of the double rock drill according to claim 5, characterized in that, A damper (3) is provided between the output port of the hydraulic pump (2) and the control chamber of the hydraulic pump (2).

8. The impact hydraulic control system of the double rock drill according to claim 5, characterized in that, The first control directional control valve (16) is specifically a two-position four-way hydraulically controlled directional control valve.

9. The impact hydraulic control system of the double rock drill according to claim 5, characterized in that, The second control directional control valve (17) is specifically a two-position four-way directional control valve.

10. A rock bolt jumbo, characterized in that, It includes a double rock drill impact hydraulic control system according to any one of claims 1-9.

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