A three-stage anti-jamming system for rock drilling control

Abstract

This invention provides a three-level anti-jamming system for rock drilling control, relating to the field of drilling technology. It includes a rock drilling control system and a three-level anti-jamming system. The rock drilling control system comprises a hydraulic pump, a hydraulic tank, a hydraulic cylinder, a control oil source valve, a hydraulic motor, an impact device, a load-sensitive rock drilling multi-way valve, and an anti-jamming valve assembly. The hydraulic pump is connected to the first, fifth, sixth, and seventh oil ports of the load-sensitive rock drilling multi-way valve, and the hydraulic tank is connected to the second oil port of the rock drilling valve assembly. This method improves the adjustability and intelligence of rock drilling control under different working conditions, increases drilling efficiency, identifies potential jamming risks, and automatically performs anti-jamming control to prevent jamming, thereby improving construction efficiency and extending equipment lifespan.

Description

Technical Field

[0001] This invention relates to the field of drilling technology, and more specifically, to a three-level anti-jamming system for rock drilling control. Background Technology

[0002] Currently, hydraulic rock drills, as rotary impact crushing equipment, encounter complex and varied geological conditions during rock drilling operations. Different geological structures require different matching of propulsion and impact pressures. In addition, if the drill bit encounters uneven geology, lava, fissures, or other conditions during drilling, it may cause the drill bit to get stuck. Therefore, the hydraulic control system of the rock drill needs to be able to easily and conveniently adjust the impact and propulsion pressure according to different geological conditions, as well as have a reliable anti-jamming function. Furthermore, during rock drilling, operators need to control the feed, rotation, and impact of the equipment. There are many switches or handles that need to be controlled. If the speed is not easily adjustable or cannot be adjusted during rock drilling, it can easily lead to excessively long rock drilling positioning time, delaying work hours, and even causing situations such as drill bit jamming and drill rod breakage, which seriously affects construction efficiency. Summary of the Invention

[0003] The problem addressed by this invention is how to improve the adjustability and intelligence of rock drilling operations under different working conditions, thereby increasing drilling efficiency, identifying potential risks of drill bit jamming, and automatically implementing anti-jamming control to prevent jamming, improve construction efficiency, and extend equipment lifespan.

[0004] To address the above problems, this invention provides a three-level anti-jamming system for rock drilling control, comprising: a rock drilling control system and a three-level anti-jamming system;

[0005] The rock drilling control system includes a hydraulic pump, a hydraulic tank, a hydraulic cylinder, a control oil source valve, a hydraulic motor, an impact device, a load-sensitive rock drilling multi-way valve, and an anti-jamming valve assembly. The hydraulic pump is connected to the first, fifth, sixth, and seventh ports of the load-sensitive rock drilling multi-way valve. The hydraulic tank is connected to the second port of the rock drilling valve assembly. The impact device is connected to the anti-dry-start valve outlet of the anti-jamming valve assembly. The eighth and ninth ports of the load-sensitive rock drilling multi-way valve are respectively connected to the rodless chamber and the... The rod chamber of the hydraulic cylinder is connected; the thirteenth port of the load-sensitive rock drilling multi-way valve is connected to the load-sensitive feedback port of the hydraulic pump; the fourteenth and fifteenth ports of the load-sensitive rock drilling multi-way valve are connected to the outlet of the control oil source valve; the load-sensitive rock drilling multi-way valve is externally connected to the tenth port of the impact device, the third port for forward rotation of the hydraulic motor, the fourth port for reverse rotation of the hydraulic motor, the eleventh port for pressure feedback of the impact device, and the twelfth port for detecting the total pressure of the hydraulic cylinder and the impact device.

[0006] The three-stage anti-jamming system is equipped with an overflow valve, an anti-dry-out valve, an anti-jamming valve, a three-stage anti-jamming valve, an overflow valve group, and a shuttle valve.

[0007] The tenth oil port is connected to the oil inlet of the overflow valve, the oil inlet of the three-stage anti-jamming valve, and the oil inlet of the anti-dry-start valve. The second oil port is connected to the return oil port of the overflow valve, the return oil port of the three-stage anti-jamming valve, the return oil port of the anti-dry-start valve, the return oil port of the overflow valve assembly, and the return oil port of the anti-jamming valve. The eighth oil port is connected to the oil inlet A of the anti-jamming valve, the first oil inlet of the shuttle valve, the control oil port of the three-stage anti-jamming valve, and the oil inlet of the overflow valve assembly. The third oil port is connected to the control oil port of the anti-jamming valve, the eleventh oil port is connected to the control oil port of the overflow valve group, the ninth oil port is connected to the other oil inlet B of the anti-jamming valve and the second oil inlet of the shuttle valve, the oil outlet of the shuttle valve is connected to the control port of the anti-dry-start valve, the oil outlet of the anti-dry-start valve is externally connected to the impact device, the oil outlet A4 of the anti-jamming valve is externally connected to the rodless chamber of the hydraulic cylinder, and the other oil outlet B4 of the anti-jamming valve is externally connected to the rod chamber of the hydraulic cylinder.

[0008] Furthermore, the rock drilling control system and the three-stage anti-jamming system are connected to external equipment and equipped with multiple pressure detection ports for connecting to pressure detection equipment. By controlling the working status of each valve block within the valve group, the hydraulic pump supplies oil to the valve group and outputs it to the hydraulic motor, the hydraulic cylinder, and the impact device. This controls the hydraulic cylinder to perform rock drilling feed operations and synchronizes the rock drilling feed, rotation, and impact operations. During operation, the thirteenth port of the rock drilling speed proportional control valve monitors the internal pressure of the hydraulic cylinder and the impact device in real time. The system measures and controls the variable displacement of the hydraulic pump. Then, by adjusting the operating rod angle of the rock drilling speed proportional control valve, it changes the throttling area of ​​the valve core, controlling the flow rate supplied to the hydraulic cylinder and the working port of the impact device. This controls the advancing or retracting speed of the hydraulic cylinder, and the impact frequency and pressure of the impact device. By detecting the pressure in the rodless chamber of the hydraulic motor, the impact device, and the hydraulic cylinder, the control pressure of the three-stage anti-jamming valve assembly is obtained, and the pressure and flow rate supplied to the hydraulic motor, the impact device, and the hydraulic cylinder are adjusted.

[0009] Furthermore, the three-stage anti-jamming valve consists of a two-position two-way directional valve, two overflow valves, and a damper; the overflow valve group consists of a two-position two-way directional valve, two overflow valves, and a damper; the anti-dry-start valve consists of a two-position three-way directional valve, the overflow valve, and a damper; and the anti-jamming valve consists of a two-position four-way directional valve, a two-position two-way directional valve, a check valve, four dampers, and two overflow valves.

[0010] Furthermore, the load-sensitive rock drilling multi-way valve includes: a first oil inlet valve, a return directional valve, a second oil inlet valve, an impact directional valve, a propulsion directional valve, and an inlet / return valve;

[0011] The inlets of the first inlet valve and the inlet-return valve are respectively connected to the inlet of the unloading valve core inside their respective valve plates. The two inlets of the second inlet valve are connected to the outlet of the inlet-return valve and the inlet of the impact directional valve and the propulsion directional valve. The inlet of the slewing directional valve is connected to the outlet of the first inlet valve. The feedback oil circuit of the slewing directional valve overpressure compensator is connected to the inlet of the main relief valve and the speed control valve of the first inlet valve. The feedback oil circuit of the impact directional valve and the propulsion directional valve overpressure compensator is connected to the inlet of the main relief valve and the speed control valve of the inlet-return valve. The slewing directional valve is provided with two secondary relief valves. The inlet of the secondary relief valve is connected to the working port of the slewing directional valve. The outlet of the relief valve and the unloading valve core is connected to the hydraulic oil tank. The return ports of the directional valves are interconnected and connected to the hydraulic oil tank.

[0012] Furthermore, the ball positioning chambers of the impact reversing valve and the propulsion reversing valve are provided with two reversing oil ports that are connected to an external control oil source. The control oil source opens to push the valve stem to reverse.

[0013] Furthermore, the oil inlet of the main relief valve of the three-stage anti-jamming valve is connected to the oil outlet of the two-position two-way directional valve. The oil inlet of the relief valve is connected to the spring cavity of the two-position two-way directional valve and connected to the oil circuit after passing through two damping holes. The control oil circuit is connected to the switching cavity of the two-position two-way directional valve after passing through one damping hole. The oil outlets of both relief valves are connected to the hydraulic oil tank. The three-stage anti-jamming valve is equipped with two pressure detection ports for detecting the pressure of the oil inlet.

[0014] Furthermore, the oil inlet of the high-thrust relief valve in the relief valve assembly is connected to the oil inlet port, the reversing chamber of the two-position two-way directional valve is connected to the oil circuit after the control oil port passes through the damping hole, the oil inlet of the low-thrust relief valve is connected to the oil outlet of the two-position two-way directional valve, the spring chambers of the two relief valves and the two-position two-way directional valve are connected to the hydraulic oil tank, and the relief valve assembly is equipped with a pressure detection port for detecting the pressure of the oil inlet.

[0015] Furthermore, the switching chamber and control oil port of the two-position two-way directional valve of the air-raiding valve are connected to the oil circuit after passing through the damping hole, the oil outlet of the two-position two-way directional valve is connected to the impact device, the spring chamber and return oil port of the two-position two-way directional valve are connected to the hydraulic oil tank, and the switching pressure of the two-position two-way directional valve is adjustable.

[0016] Furthermore, the outlet of the two-position four-way directional valve of the anti-jamming valve is connected to the inlet of the two-position two-way directional valve and the spring chamber of the check valve; the other outlet of the two-position four-way directional valve is connected to the rod chamber of the hydraulic cylinder; the switching chamber of the two-position four-way directional valve is connected to the oil circuit after the control port passes through a damping orifice; the spring chamber of the two-position four-way directional valve is connected to the oil circuit after the control port passes through two damping orifices; the outlet of the two-position two-way directional valve is connected to the rodless chamber of the hydraulic cylinder; the switching chamber of the two-position two-way directional valve is connected to the oil circuit after the control port passes through a damping orifice; the spring chamber of the two-position two-way directional valve is connected to the oil circuit after the control port passes through two damping orifices; the inlets of the two relief valves are connected to the oil circuit after the control port passes through two damping orifices; the outlets of the two relief valves are connected to the hydraulic oil tank; and the switching chamber of the check valve is connected to the rodless chamber of the hydraulic cylinder.

[0017] Furthermore, the anti-jamming valve is equipped with two pressure detection ports for detecting the pressure of the oil inlet A, one pressure detection port for detecting the pressure of the oil inlet B, two pressure detection ports for detecting the pressure of the control oil port, one pressure detection port for detecting the pressure of the spring chamber of the two-position four-way directional valve, one pressure detection port for detecting the pressure of the spring chamber of the two-position two-way directional valve, and one pressure detection port for detecting the pressure of the oil outlet of the two-position two-way directional valve.

[0018] The present invention employing the above technical solution has the following beneficial effects:

[0019] This invention utilizes a three-stage anti-jamming system for rock drilling control, equipped with multiple oil ports connected to external equipment and pre-installed pressure detection ports. This allows for real-time connection to pressure detection devices. By controlling the operating status of each valve block within the valve group, oil is supplied to the valve group via a hydraulic pump and output to the hydraulic motor, hydraulic cylinder, and impact device. This controls the hydraulic cylinder for rock drilling feed operations, enabling simultaneous operation of rock drilling feed, rotation, and impact. During operation, the internal pressure of the hydraulic cylinder and impact device can be monitored in real-time via the thirteenth oil port of the rock drilling speed proportional control valve. The hydraulic pump variable is controlled, and the oil flow within the valve core is altered by adjusting the operating lever angle of the rock drilling speed proportional control valve. The throttling area allows for adjustment of the flow rate supplied to the hydraulic cylinder and impact equipment, making the advance or retraction speed of the hydraulic cylinder controllable and adjustable, as well as the impact frequency and pressure of the impact equipment controllable and adjustable. By automatically detecting the pressure in the rodless chamber of the hydraulic motor, impact equipment, and hydraulic cylinder, the control pressure of the three-stage anti-jamming valve group is determined, thereby adjusting the pressure and flow supplied to the hydraulic motor, impact equipment, and hydraulic cylinder. This improves the adjustability and intelligence of rock drilling operations under different working conditions, increases hole straightness and drilling efficiency, automatically identifies potential jamming risks, and automatically implements anti-jamming control to effectively prevent jamming, improve construction efficiency, and extend equipment lifespan. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-level anti-jamming system for rock drilling control provided in an embodiment of the present invention;

[0021] Among them: 1-load-sensitive rock drilling multi-way valve, 2-relief valve, 3-three-stage anti-jamming valve, 4-relief valve group, 5-anti-dry-out valve, 6-anti-jamming valve, 7-hydraulic motor, 8-hydraulic cylinder, 9-impact device, 10-shuttle valve, 1.1-first inlet valve, 1.2-return directional valve, 1.3-second inlet valve, 1.4-impact directional valve, 1.5-propulsion directional valve, 1.6-inlet and return valve, P-first port, T-second port, A1-third port, B1-fourth port, P1-fifth port, P2-sixth port, P3-seventh port, A3-eighth port, B3-ninth port, A2-tenth port, B2-eleventh port, M-twelfth port, Ls-thirteenth port, b3-fourteenth port, b2-fifteenth port. Detailed Implementation

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. Example

[0024] This embodiment provides a three-level anti-jamming system for rock drilling control, such as... Figure 1 As shown, this system includes: a rock drilling control system and a three-level anti-jamming system;

[0025] The rock drilling control system includes a hydraulic pump, a hydraulic tank, a hydraulic cylinder 8, a control oil source valve, a hydraulic motor 7, an impact device 9, a load-sensitive rock drilling multi-way valve 1, and an anti-jamming valve assembly. The hydraulic pump is connected to the first port P, the fifth port P1, the sixth port P2, and the seventh port P3 of the load-sensitive rock drilling multi-way valve 1. The hydraulic tank is connected to the second port T of the rock drilling valve assembly. The impact device 9 is connected to the outlet of the anti-dry-start valve 5 of the anti-jamming valve assembly. The eighth port A3 and the ninth port B3 of the load-sensitive rock drilling multi-way valve 1 are connected to the rodless part of the hydraulic cylinder 8. The cylinder and the rod chamber of the hydraulic cylinder 8 are connected. The thirteenth oil port Ls of the load-sensitive rock drilling multi-way valve 1 is connected to the load-sensitive feedback port of the hydraulic pump. The fourteenth oil port b3 and the fifteenth oil port b2 of the load-sensitive rock drilling multi-way valve 1 are connected to the outlet of the control oil source valve. The load-sensitive rock drilling multi-way valve 1 is connected to the tenth oil port A2 of the external impact device 9, the third oil port A1 of the forward rotation of the hydraulic motor 7, the fourth oil port B1 of the reverse rotation of the hydraulic motor 7, the eleventh oil port B2 of the pressure feedback of the impact device 9, and the twelfth oil port M of the total pressure of the hydraulic cylinder 8 and the impact device 9.

[0026] The three-stage anti-jamming system is equipped with an overflow valve 2, an anti-dry-out valve 5, an anti-jamming valve 6, a three-stage anti-jamming valve 3, an overflow valve group 4, and a first oil inlet valve 1.1;

[0027] The tenth oil port A2 is connected to the inlet of the overflow valve 2, the inlet of the three-stage anti-jamming valve 3, and the inlet of the anti-air-burst valve 5. The second oil port T is connected to the return port of the overflow valve 2, the return port of the three-stage anti-jamming valve 3, the return port of the anti-air-burst valve 5, the return port of the overflow valve assembly 4, and the return port of the anti-jamming valve 6. The eighth oil port A3 is connected to the inlet A of the anti-jamming valve 6, the first inlet of the first inlet valve 1.1, the control port of the three-stage anti-jamming valve 3, and the inlet of the overflow valve assembly 4. The third oil port A1... The control port of the anti-jamming valve 6 is connected to the control port of the eleventh port B2, the control port of the relief valve group 4 is connected to the other inlet B of the anti-jamming valve 6 and the second inlet of the first inlet valve 1.1, the outlet of the first inlet valve 1.1 is connected to the control port of the anti-air-burst valve 5, the outlet of the anti-air-burst valve 5 is connected to the impact device 9, the outlet A4 of the anti-jamming valve 6 is connected to the rodless chamber of the hydraulic cylinder 8, and the other outlet B4 of the anti-jamming valve 6 is connected to the rod chamber of the hydraulic cylinder 8.

[0028] Specifically, the rock drilling control system is equipped with a load-sensitive rock drilling multi-way valve 1, a first oil port P for connecting to an external hydraulic pump, a second oil port T for connecting to an external hydraulic oil tank, a third oil port A1 for connecting to the external hydraulic rotary motor in forward rotation, a fourth oil port B1 for connecting to the external hydraulic rotary motor in reverse rotation, a fifth oil port P1 for connecting to an external hydraulic pump, a sixth oil port P2 for connecting to an external hydraulic pump, a seventh oil port P3 for connecting to an external hydraulic pump, an eighth oil port A3 connected to the anti-jamming valve inlet A, a ninth oil port B3 connected to the anti-jamming valve inlet B, a tenth oil port A2 for connecting to an external impact device 9, an eleventh oil port B2 for pressure feedback from the external impact device 9, a twelfth oil port M for detecting the total pressure of the propulsion cylinder and the impact device 9, a thirteenth oil port Ls for connecting to the external load-sensitive pump feedback port, a fourteenth oil port b3 for controlling the rapid retraction of the propulsion by an external control oil source, and a fifteenth oil port b2 for controlling the rapid retraction of the impact by an external control oil source.

[0029] Specifically, the rock drilling speed proportional control system is equipped with a load-sensitive rock drilling multi-way valve 1. The load-sensitive rock drilling multi-way valve 1 is a flow distribution multi-way valve that is independent of load pressure. The flow of each directional valve in the multi-way valve is adjustable and is independent of the number of directional valves controlled at the same time, load pressure, and flow. The flow distribution is proportional to its demand. Variable pumps or fixed pumps can be used, or two pumps can be used simultaneously. One pump is used for the rotary path, and another pump is used for the impact and propulsion oil paths.

[0030] Specifically, the load-sensitive rock drilling multi-way valve 1 has three directional valves that operate in a manual mode with steel ball positioning. The operating lever can be fixed at any position before the maximum stroke and has two fixed points. The steel ball positioning fixed points of the impact directional valve 1.4 are in the same direction, so there are two fixed points when operating in the same direction.

[0031] The rock drilling control system and the three-level anti-jamming system are connected to external equipment and have multiple pressure detection ports for connecting to pressure detection equipment. By controlling the working status of each valve block in the valve group, the hydraulic pump supplies oil to the valve group and outputs it to the hydraulic motor 7, hydraulic cylinder 8, and impact device 9. This controls the hydraulic cylinder 8 to perform rock drilling feed operations and controls the synchronous operation of rock drilling feed, rotation, and impact. During the operation, the internal pressure of the hydraulic cylinder 8 and impact device 9 is monitored in real time through the thirteenth oil port Ls of the rock drilling speed proportional control valve. The system controls the variable displacement of the hydraulic pump, and then changes the throttling area of ​​the valve core by adjusting the operating rod push angle of the rock drilling speed proportional control valve. This controls and adjusts the flow rate at the working port of the hydraulic cylinder 8 and the impact device 9, as well as the speed at which the hydraulic cylinder 8 advances or retracts. It also controls and adjusts the impact frequency and impact pressure of the impact device 9. By detecting the pressure in the rodless chamber of the hydraulic motor 7, the impact device 9, and the hydraulic cylinder 8, the control pressure of the three-stage anti-jamming valve group is obtained, and the pressure and flow rate supplied to the hydraulic motor 7, the impact device 9, and the hydraulic cylinder 8 are adjusted.

[0032] Among them, the three-stage anti-jamming valve consists of a two-position two-way directional valve, two relief valves 2 and a damper; the relief valve group 4 consists of a two-position two-way directional valve, two relief valves 2 and a damper; the anti-air-burst valve 5 consists of a two-position three-way directional valve, a relief valve 2 and a damper; and the anti-jamming valve consists of a two-position four-way directional valve, a two-position two-way directional valve, a check valve, four dampers and two relief valves 2.

[0033] The load-sensitive rock drilling multi-way valve 1 includes: a first oil inlet valve, a return directional valve 1.2, a second oil inlet valve 1.3, an impact directional valve 1.4, a propulsion directional valve 1.5, and an inlet / return valve 1.6;

[0034] The inlets of the first inlet valve and the inlet / return valve 1.6 are respectively connected to the inlet of the unloading valve core inside their respective valve plates. The two inlets of the second inlet valve 1.3 are connected to the outlet of the inlet / return valve 1.6 and the inlets of the impact directional valve 1.4 and the propulsion directional valve 1.5. The inlet of the return directional valve 1.2 is connected to the outlet of the first inlet valve. The feedback oil circuit of the return directional valve 1.2 over the pressure compensator is connected to the main relief valve 2 and the speed control valve of the first inlet valve. The oil inlet of the valve is connected to the main relief valve 2 of the inlet and return valve 1.6 and the inlet of the speed control valve. The feedback oil circuit of the impact directional valve 1.4 and the propulsion directional valve 1.5 over the pressure compensator is connected to the oil inlet of the return valve 1.6. The return valve 1.2 is equipped with two secondary relief valves 2. The oil inlet of the secondary relief valve 2 is connected to the working port of the return valve 1.2. The oil outlet of the relief valve 2 and the unloading valve core is connected to the hydraulic oil tank. The return ports of the directional valves are interconnected and connected to the hydraulic oil tank.

[0035] Among them, the ball positioning chambers of the impact reversing valve 1.4 and the propulsion reversing valve 1.5 are provided with two reversing oil ports that are connected to an external control oil source. The control oil source opens to push the valve stem to reverse.

[0036] Among them, the oil inlet of the main relief valve 2 of the three-stage anti-jamming valve is connected to the oil outlet of the two-position two-way directional valve. The oil inlet of the control relief valve 2 is connected to the spring cavity of the two-position two-way directional valve and connected to the oil circuit after passing through two damping holes. The control oil circuit is connected to the switching cavity of the two-position two-way directional valve after passing through one damping hole. The oil outlets of the two relief valves 2 are connected to the hydraulic oil tank. The three-stage anti-jamming valve is equipped with two pressure detection ports for detecting the pressure of the oil inlet.

[0037] Among them, the oil inlet of the high-thrust relief valve 2 of the relief valve group 4 is connected to the oil inlet port, the reversing chamber of the two-position two-way directional valve is connected to the oil circuit after the control oil port through the damping hole, the oil inlet of the low-thrust relief valve 2 is connected to the oil outlet of the two-position two-way directional valve, the spring chambers of the two relief valves 2 and the two-position two-way directional valve are connected to the hydraulic oil tank, and the relief valve group 4 is provided with a pressure detection port for detecting the pressure of the oil inlet.

[0038] Among them, the switching chamber of the two-position two-way directional valve of the anti-aircraft valve 5 is connected to the oil circuit after the control oil port passes through the damping hole, the oil outlet of the two-position two-way directional valve is connected to the impact device 9, the spring chamber of the two-position two-way directional valve and the oil return port of the two-position two-way directional valve are connected to the hydraulic oil tank, and the switching pressure of the two-position two-way directional valve is adjustable.

[0039] Among them, the oil outlet of the two-position four-way directional valve of the anti-jamming valve is connected to the oil inlet of the two-position two-way directional valve and the spring chamber of the check valve; the other oil outlet of the two-position four-way directional valve is connected to the rod chamber of the hydraulic cylinder 8; the switching chamber of the two-position four-way directional valve is connected to the oil circuit after the control port passes through a damping orifice; the spring chamber of the two-position four-way directional valve is connected to the oil circuit after the control port passes through two damping orifices; the oil outlet of the two-position two-way directional valve is connected to the rodless chamber of the hydraulic cylinder 8; the switching chamber of the two-position two-way directional valve is connected to the oil circuit after the control port passes through a damping orifice; the spring chamber of the two-position two-way directional valve is connected to the oil circuit after the control port passes through two damping orifices; the oil inlet of the two relief valves 2 is connected to the oil circuit after the control port passes through two damping orifices; the oil outlet of the two relief valves 2 is connected to the hydraulic oil tank; and the switching chamber of the check valve is connected to the rodless chamber of the hydraulic cylinder 8.

[0040] Among them, the anti-jamming valve is equipped with two pressure detection ports for detecting the pressure of oil inlet A, one pressure detection port for detecting the pressure of oil inlet B, two pressure detection ports for detecting the pressure of control oil ports, one pressure detection port for detecting the pressure of the spring chamber of the two-position four-way directional valve, one pressure detection port for detecting the pressure of the spring chamber of the two-position two-way directional valve, and one pressure detection port for detecting the pressure of the oil outlet of the two-position two-way directional valve.

[0041] Specifically, during operation, the load-sensitive rock drilling multi-way valve 1 has three operating levers, which respectively control the working status of the corresponding external hydraulic motor 7, hydraulic cylinder 8, and impact device 9. By pushing the operating levers on the load-sensitive rock drilling multi-way valve 1, the rock drilling working status is changed. When the operating lever is in the neutral position, the external equipment does not work. As the operating lever is pushed, the external equipment starts to work. The greater the amplitude of the pushing of the operating lever, the faster the equipment works. The operating lever can be fixed at any position before the maximum stroke and has two fixed points. The flow rate output from the working port of the load-sensitive rock drilling multi-way valve 1 when the fixed point is reached can be set according to the actual working conditions. The load-sensitive rock drilling multi-way valve 1 can simultaneously supply power to the hydraulic motor 7, hydraulic cylinder 8, and impact device 9. The working port of device 9 supplies oil and the flow rate is distributed according to a set ratio, thereby realizing synchronous operation of rock drilling feed, rotation, and impact, and the speed is controllable and adjustable. Among them, the working linkage operating rod connected to the impact device 9 can only be operated in one direction. When it advances a certain distance, the distance can be adjusted as required, it is a low-impact operation with a constant flow rate. At this time, the eleventh oil port B2 is not working, and only the tenth oil port A2 works, and the flow rate can be set as required. The flow rate can be less than the flow rate at the maximum stroke, which is used for low-impact operation suitable for soft rock layers and other working conditions. When the device advances further, the tenth oil port A2 and the eleventh oil port B2 work at the same time, which is a high-impact operation. The tenth oil port A2 supplies oil to the impact device 9, and the eleventh oil port B2 controls the reversing of the two-position two-way valve of the overflow valve group 4.

[0042] This system improves the adjustability and intelligence of rock drilling under different working conditions, thereby increasing the efficiency of rock drilling. The invention also reduces the number of handles or switches that need to be operated. Three handles are sufficient to link the rotation, impact, and propulsion functions under rock drilling conditions, and the pressure and flow rate are adjustable. This reduces the labor intensity of operators, increases the service life of equipment, and improves the control of rock drilling speed and construction efficiency.

[0043] This system features a three-stage anti-jamming system for rock drilling control, equipped with multiple oil ports for connecting to external equipment and a reserved pressure detection port. This allows for real-time connection to pressure detection devices. By controlling the operating status of each valve block within the valve group, oil is supplied to the valve group via a hydraulic pump and output to the hydraulic motor, hydraulic cylinder, and impact equipment. This controls the hydraulic cylinder for rock drilling feed operations and enables simultaneous operation of rock drilling feed, rotation, and impact. During operation, the internal pressure of the hydraulic cylinder and impact equipment can be monitored in real-time via the thirteenth oil port of the rock drilling speed proportional control valve. The hydraulic pump variable is controlled, and the oil flow within the valve core is altered by adjusting the operating lever angle of the rock drilling speed proportional control valve. The throttling area allows for adjustment of the flow rate supplied to the hydraulic cylinder and impact equipment, making the advance or retraction speed of the hydraulic cylinder controllable and adjustable, as well as the impact frequency and pressure of the impact equipment controllable and adjustable. By automatically detecting the pressure in the rodless chamber of the hydraulic motor, impact equipment, and hydraulic cylinder, the control pressure of the three-stage anti-jamming valve group is determined, thereby adjusting the pressure and flow supplied to the hydraulic motor, impact equipment, and hydraulic cylinder. This improves the adjustability and intelligence of rock drilling operations under different working conditions, increases hole straightness and drilling efficiency, automatically identifies potential jamming risks, and automatically implements anti-jamming control to effectively prevent jamming, improve construction efficiency, and extend equipment lifespan.

[0044] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A three-stage jamming prevention system for rock drilling control, characterized in that The invention relates to a rock drilling rig control system and a three-stage drill jamming prevention system. The rock drilling rig control system comprises a hydraulic pump, a hydraulic oil tank, a hydraulic cylinder (8), a control oil source valve, a hydraulic motor (7), an impact device (9), a load-sensitive rock drilling multi-way valve (1) and a drill jamming prevention valve group, the hydraulic pump is connected with the first oil port (P) and the fifth oil port (P1), the sixth oil port (P2) and the seventh oil port (P3) of the load-sensitive rock drilling multi-way valve (1) respectively, the hydraulic oil tank is connected with the second oil port (T) of the rock drilling valve group, the impact device (9) is connected with the oil outlet of the drill jamming prevention valve group, the eighth oil port (A3) and the ninth oil port (B3) of the load-sensitive rock drilling multi-way valve (1) are connected with the rodless cavity of the hydraulic cylinder (8) and the rod cavity of the hydraulic cylinder (8) respectively, the thirteenth oil port (Ls) of the load-sensitive rock drilling multi-way valve (1) is connected with the load-sensitive feedback port of the hydraulic pump, the fourteenth oil port (b3) and the fifteenth oil port (b2) of the load-sensitive rock drilling multi-way valve (1) are connected with the oil outlet of the control oil source valve, the load-sensitive rock drilling multi-way valve (1) is connected with the tenth oil port (A2) of the impact device (9), the third oil port (A1) of the hydraulic motor (7) in normal rotation, the fourth oil port (B1) of the hydraulic motor (7) in reverse rotation, the eleventh oil port (B2) of the impact device (9) in pressure feedback and the twelfth oil port (M) for detecting the total pressure of the hydraulic cylinder (8) and the impact device (9); The three-stage drill jamming prevention system is provided with an overflow valve (2), a drill empty striking prevention valve (5), a drill jamming prevention valve (6), a three-stage drill jamming prevention valve (3), an overflow valve group (4) and a first oil inlet valve (1.1); The tenth oil port (A2) is connected with the oil inlet of the overflow valve (2), the oil inlet of the three-stage drill jamming prevention valve (3) and the oil inlet of the drill empty striking prevention valve (5), the second oil port (T) is connected with the oil return port of the overflow valve (2), the oil return port of the three-stage drill jamming prevention valve (3), the oil return port of the drill empty striking prevention valve (5), the oil return port of the overflow valve group (4) and the oil return port of the drill jamming prevention valve (6), the eighth oil port (A3) is connected with the oil inlet A of the drill jamming prevention valve (6), the first oil inlet of the first oil inlet valve (1.1), the control oil port of the three-stage drill jamming prevention valve (3) and the oil inlet of the overflow valve group (4), the third oil port (A1) is connected with the control oil port of the drill jamming prevention valve (6), the eleventh oil port (B2) is connected with the control oil port of the overflow valve group (4), the ninth oil port (B3) is connected with the other oil inlet B of the drill jamming prevention valve (6) and the second oil inlet of the first oil inlet valve (1.1), the oil outlet of the first oil inlet valve (1.1) is connected with the control port of the drill empty striking prevention valve (5), the oil outlet of the drill empty striking prevention valve (5) is connected with the impact device (9), the oil outlet A4 of the drill jamming prevention valve (6) is connected with the rodless cavity of the hydraulic cylinder (8), and the other oil outlet B4 of the drill jamming prevention valve (6) is connected with the rod cavity of the hydraulic cylinder (8).

2. A three-stage jamming prevention system for rock drilling control according to claim 1, characterized in that, The rock drilling control system and the three-stage anti-stuck drill system are connected with external devices and are provided with a plurality of pressure detection ports for communicating with pressure detection devices. The working states of each valve block in the valve group are controlled, oil is supplied to the valve group by the hydraulic pump, and is output to the hydraulic motor (7), the hydraulic cylinder (8) and the impact device (9), the hydraulic cylinder (8) is controlled to perform rock drilling feeding operation, and the synchronous operation of rock drilling feeding, rotation and impact is controlled. The internal pressure of the hydraulic cylinder (8) and the impact device (9) is monitored in real time through the thirteenth oil port (Ls) of the rock drilling speed proportional control valve during the operation, and the variable of the hydraulic pump is controlled. The push rod angle of the rock drilling speed proportional control valve is adjusted to change the internal throttling area of the valve core, control and adjust the flow size of the working port of the hydraulic cylinder (8) and the impact device (9), control and adjust the advancing or retreating speed of the hydraulic cylinder (8), control and adjust the impact frequency and impact pressure of the impact device (9), the pressure of the hydraulic motor (7), the impact device (9) and the rodless cavity of the hydraulic cylinder (8) is detected, the control pressure of the three-stage anti-stuck drill valve group is obtained, and the pressure and flow of the hydraulic motor (7), the impact device (9) and the hydraulic cylinder (8) are adjusted.

3. A three-stage jamming prevention system for rock drilling control according to claim 1, characterized in that, The three-stage anti-stuck drill valve is composed of a two-position two-way reversing valve, two overflow valves (2) and a damper; the overflow valve group (4) is composed of a two-position two-way reversing valve, two overflow valves (2) and a damper; the anti-air drilling valve (5) is composed of a two-position three-way reversing valve, an overflow valve (2) and a damper; and the anti-stuck drill valve is composed of a two-position four-way reversing valve, a two-position two-way reversing valve, a check valve, four dampers and two overflow valves (2).

4. A three-stage jamming prevention system for rock drilling control according to claim 3, characterized in that, The load-sensitive rock drilling multi-way valve (1) comprises a rotation reversing valve (1.2), a second oil inlet valve (1.3), an impact reversing valve (1.4), a pushing reversing valve (1.5) and an inlet and return valve (1.6). The oil inlet of the first oil inlet valve and the oil inlet of the oil inlet and outlet valve (1.6) are connected with the oil inlet of the unloading valve core inside the respective valve plate, the two oil inlets of the second oil inlet valve (1.3) are connected with the oil outlet of the oil inlet and outlet valve (1.6) and the oil inlets of the impact reversing valve (1.4) and the pushing reversing valve (1.5), the oil inlet of the rotation reversing valve (1.2) is connected with the oil outlet of the first oil inlet valve, the feedback oil path of the overpressure compensator of the rotation reversing valve (1.2) is connected with the oil inlets of the main overflow valve (2) and the speed regulating valve of the first oil inlet valve, the feedback oil paths of the overpressure compensators of the impact reversing valve (1.4) and the pushing reversing valve (1.5) are connected with the oil inlets of the main overflow valve (2) and the speed regulating valve of the oil inlet and outlet valve (1.6), the rotation reversing valve (1.2) is provided with two secondary overflow valves (2), the oil inlets of the secondary overflow valves (2) are connected with the working ports of the rotation reversing valve (1.2), the oil outlets of the overflow valves (2) and the unloading valve core are connected with the hydraulic oil tank, and the oil return ports of the reversing valves are communicated with each other and connected with the hydraulic oil tank.

5. A three-stage jamming prevention system for rock drilling control according to claim 4, characterized in that, Two reversing oil ports are arranged on the steel ball positioning cavity of the impact reversing valve (1.4) and the pushing reversing valve (1.5) and connected with an external control oil source, and the control oil source opens the pushing valve rod reversing.

6. A three-stage jamming prevention system for rock drilling control according to claim 4, characterized in that, The oil inlets of the main overflow valves (2) of the three-stage anti-stuck drill valves are connected with the oil outlets of two-position two-way reversing valves, the oil inlets of the control oil paths of the control oil inlets of the two-position two-way reversing valves are connected with the spring cavities of the two-position two-way reversing valves and the oil paths after the oil paths of the control oil inlets pass through two damping holes, the oil paths after the control oil paths pass through a damping hole are connected with the reversing cavities of the two-position two-way reversing valves, the oil outlets of the two overflow valves (2) are connected with the hydraulic oil tank, and the three-stage anti-stuck drill valves are provided with two pressure detection ports for detecting the oil inlet pressures.

7. A three-stage jamming prevention system for rock drilling control according to claim 4, characterized in that, The oil inlets of the high-pushing overflow valves (2) of the overflow valve group (4) are connected with the oil inlets, the reversing cavities of the two-position two-way reversing valves are connected with the oil paths after the oil paths of the control oil inlets pass through damping holes, the oil inlets of the low-pushing overflow valves (2) are connected with the oil outlets of the two-position two-way reversing valves, the spring cavities of the two-position two-way reversing valves and the two-position two-way reversing valves are connected with the hydraulic oil tank, and the overflow valve group (4) is provided with a pressure detection port for detecting the oil inlet pressure.

8. A three-stage jamming prevention system for rock drilling control according to claim 4, characterized in that, The reversing cavities of the two-position two-way reversing valves of the anti-air hammer valve (5) are connected with the oil paths after the oil paths of the control oil inlets pass through damping holes, the oil outlets of the two-position two-way reversing valves are connected with the impact equipment (9), the spring cavities of the two-position two-way reversing valves and the oil return ports of the two-position two-way reversing valves are connected with the hydraulic oil tank, and the reversing pressures of the two-position two-way reversing valves are adjustable.

9. A three-stage jamming prevention system for rock drilling control according to claim 4, characterized in that, The oil outlet of the two-position four-way reversing valve of the anti-stuck drill valve is connected with the oil inlet of the two-position two-way reversing valve and the spring cavity of the one-way valve, the other oil outlet of the two-position four-way reversing valve is connected with the rod cavity of the hydraulic cylinder (8), the reversing cavity of the two-position four-way reversing valve is connected with the oil path after the control oil port passes through a damping hole, the spring cavity of the two-position four-way reversing valve is connected with the oil path after the control oil port passes through two damping holes, the oil outlet of the two-position two-way reversing valve is connected with the rodless cavity of the hydraulic cylinder (8), the reversing cavity of the two-position two-way reversing valve is connected with the oil path after the control oil port passes through a damping hole, the spring cavity of the two-position two-way reversing valve is connected with the oil path after the control oil port passes through two damping holes, the oil inlets of the two overflow valves (2) are connected with the oil path after the control oil port passes through two damping holes, the oil outlets of the two overflow valves (2) are connected with the hydraulic oil tank, and the reversing cavity of the one-way valve is connected with the rodless cavity of the hydraulic cylinder (8).

10. A three-stage jamming prevention system for rock drilling control according to claim 4, characterized in that, The anti-stuck drill valve is provided with two pressure detection ports for detecting the pressure of the oil inlet A, one pressure detection port for detecting the pressure of the oil inlet B, two pressure detection ports for detecting the pressure of the control oil port, one pressure detection port for detecting the pressure of the spring cavity of the two-position four-way reversing valve, one pressure detection port for detecting the pressure of the spring cavity of the two-position two-way reversing valve, and one pressure detection port for detecting the pressure of the oil outlet of the two-position two-way reversing valve.

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