Rock drilling hydraulic control system and engineering device

Abstract

A rock drilling hydraulic control system (100) and an engineering device. The rock drilling hydraulic control system (100) comprises: an actuating mechanism (1); a power mechanism (13), connected to the actuating mechanism (1) by means of an oil pipeline (18) and used for providing power for the actuating mechanism (1); a control valve group (2), arranged on the oil pipeline (18) and used for controlling the communication of the oil pipeline (18); a gas measurement apparatus (3), arranged on the actuating mechanism (1) and used for measuring the content of protective gas in the actuating mechanism (1); and a control apparatus (15), connected to the control valve group (2) and the gas measurement apparatus (3) separately and used for controlling the operating state of the control valve group (2) on the basis of a measurement result of the gas measurement apparatus (3).

Description

Rock drilling hydraulic control system and engineering equipment

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese patent application No. 202411070581.6, filed on August 6, 2024, and entitled "Rock drilling hydraulic control system and engineering equipment", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of engineering equipment, in particular to a rock drilling hydraulic control system and engineering equipment. BACKGROUND

[0004] At present, in the process of mining tunnel excavation construction, the blasting excavation construction process is used, which needs to drill holes, and thus the rock drilling jumbo is introduced. In the use process of the rock drilling jumbo, in order to maintain good work efficiency, some protection elements need to be added in the hydraulic system. The introduction of the protection elements not only improves the service life of the rock drilling jumbo, but also greatly reduces the failure rate and ensures the work efficiency. However, the rock drilling jumbo in the related technology still has the following problems: first, the sensitivity of the anti-stuck drill valve group is low, and the drill rod cannot be protected in time. Second, nitrogen protection is needed in the rock drilling machine, and it is not possible to detect whether nitrogen is present in the rock drilling machine. Third, when the rock drilling machine is in high-low pressure impact operation, there are interlayers in the rock, which will cause pulsating impact, and there is no higher pressure protection. Fourth, during the rock drilling operation, the actual operation pressure is lower than the full load pressure. If the full load pressure adjusted by the main valve is always used, when the drill rod is stuck, because the full load pressure is large, the drill rod will be bent and damaged.

[0005] Therefore, how to design a rock drilling hydraulic control system that can further protect the rock drilling jumbo has become a problem to be solved at present. SUMMARY

[0006] The present application aims to at least solve the problem of low service life of the rock drilling jumbo.

[0007] To this end, the first aspect of the present application provides a rock drilling hydraulic control system.

[0008] The second aspect of the present application provides an engineering equipment.

[0009] Therefore, the first aspect of the present application provides a rock drilling hydraulic control system, comprising: an actuator; a power mechanism connected with the actuator through an oil pipeline, used for providing power for the actuator; a control valve group arranged on the oil pipeline, used for controlling the conduction of the oil pipeline; a gas detection device arranged in the actuator, used for detecting the content of the protective gas in the actuator; and a control device connected with the control valve group and the gas detection device respectively, used for controlling the working state of the control valve group according to the detection result of the gas detection device.

[0010] The rock drilling hydraulic control system provided by the present application comprises an actuator, a power mechanism, a control valve group, a gas detection device and a control device. The power mechanism is connected with the actuator through an oil pipeline, so as to provide power for the actuator, so that the actuator works, for example, the power mechanism can provide hydraulic oil for the actuator. The control valve group is arranged on the oil pipeline, which can control the conduction of the oil pipeline, so that when the actuator does not need to work, the oil pipeline between the actuator and the power mechanism can be disconnected through the control valve group. The gas detection device is arranged on the actuator, which can detect the content of the protective gas in the actuator and send it to the control device. When the gas detection device detects that the content of the protective gas in the actuator is insufficient, it can send a signal to the control device, and the control device makes the control valve group disconnected, so that the power mechanism does not work, which avoids the situation that the actuator works without protective gas, and improves the service life of the equipment. At the same time, since the gas detection device is arranged and connected with the control device, when the content of the protective gas in the actuator is insufficient, the control device can close the control valve group in time, the reaction speed is fast, and the situation that the actuator works without protective gas can be effectively avoided.

[0011] It can be understood that the working state of the control valve group can be a conduction state and a disconnection state. The conduction state further includes a plurality of conduction states.

[0012] According to the rock drilling hydraulic control system provided by the present application, the following additional technical features can be further provided:

[0013] In some embodiments, the actuator comprises a rotary motor, a rock drill and a push cylinder, and the gas detection device is arranged in the rock drill; the control valve group comprises a pilot valve group and a reversing valve group, and the power mechanism is further used for providing power for the reversing of the reversing valve group, and the pilot valve group is arranged on the oil pipeline between the power mechanism and the reversing valve group, and is used for adjusting the reversing direction of the reversing valve group.

[0014] In the embodiment, the actuating mechanism includes a rotary motor, a rock drill and a propulsion cylinder. The gas detection device is arranged on the rock drill and can detect the content of the protective gas in the rock drill. The control valve group includes a pilot valve group and a reversing valve group. The power mechanism can provide power for the reversing valve group, so that the reversing valve group is reversed, so that the hydraulic oil provided by the power mechanism is delivered to the actuating mechanism through different oil pipelines to realize different actions of the actuating mechanism. For example, the rotary motor is forward rotated or reversed, the rock drill is high pressure impact worked or low pressure impact worked, and the propulsion cylinder is advanced or retreated. At the same time, by arranging the pilot valve group, the power provided by the power mechanism can be avoided from always acting on the reversing valve group, so that the reversing cannot be realized. By arranging the pilot valve group, the reversing direction of the reversing valve group can be adjusted according to the actual situation to meet the actual use requirement.

[0015] In some embodiments, optionally, the control device is connected with the pilot valve group and the gas detection device respectively, and is used for controlling the working state of the pilot valve group according to the detection result of the gas detection device.

[0016] In the embodiment, the control device is connected with the pilot valve group and the gas detection device respectively, and can control the working state of the pilot valve group according to the detection result of the gas detection device. It can be understood that the reversing valve group is in a disconnected state in the non-working state, and when working, the reversing valve group needs to be controlled by the pilot valve group to be reversed, so that the oil pipeline is connected, so as to realize the working of the actuating mechanism. Therefore, the control device is connected with the pilot valve group and the gas detection device respectively in the application, the working state of the pilot valve group can be controlled by the detection result of the gas detection device, when the content of the protective gas reaches the preset requirement, the pilot valve group is controlled to work, so that the reversing valve group is reversed to realize the working of the actuating mechanism. It can be understood that the oil pipeline can be connected only when the content of the protective gas in the actuating mechanism reaches the preset requirement, so that the actuating mechanism works, so as to protect the equipment.

[0017] In some embodiments, optionally, the reversing valve group includes: a first control valve group arranged on an oil pipeline between the rotary motor and the power mechanism; a second control valve group arranged on an oil pipeline between the rock drill and the power mechanism; and a third control valve group arranged on an oil pipeline between the propulsion cylinder and the power mechanism.

[0018] In the embodiment, the reversing valve group comprises a first control valve group, a second control valve group and a third control valve group. The first control valve group is arranged on the oil pipeline between the rotary motor and the power mechanism, and can control the on-off of the oil pipeline between the rotary motor and the power mechanism and the transmission direction of the hydraulic oil, so that the rotary motor can realize forward rotation and reverse rotation. The second control valve group is arranged on the oil pipeline between the rock drill and the power mechanism, and can control the on-off of the oil pipeline and the input of one of the high-pressure hydraulic oil and the low-pressure hydraulic oil into the rock drill, thereby realizing high-pressure impact operation or low-pressure impact operation. The third control valve group is arranged on the oil pipeline between the advance oil cylinder and the power mechanism, and can control the on-off of the oil pipeline and the input of the hydraulic oil from the rodless chamber of the hydraulic cylinder or the rod chamber, thereby realizing the extension or retraction of the hydraulic cylinder. By arranging the reversing valve group as three control valve groups to control the rotary motor, the rock drill and the advance oil cylinder respectively, the rotary motor, the rock drill and the advance oil cylinder can work independently, and the working effect can also be ensured.

[0019] In some embodiments, optionally, the rock drilling hydraulic control system further comprises: a first overflow valve group arranged between the rock drill and the reversing valve group; and a second overflow valve group arranged between the advance oil cylinder and the reversing valve group.

[0020] In the embodiment, the rock drilling hydraulic control system further comprises the first overflow valve group and the second overflow valve group. The first overflow valve group is arranged between the rock drill and the reversing valve group, and can eliminate the instantaneous high pressure generated by the hydraulic oil input into the rock drill, thereby protecting the hydraulic system. The second overflow valve group is arranged between the advance oil cylinder and the reversing valve group, and can eliminate the instantaneous high pressure generated by the hydraulic oil input into the advance oil cylinder, thereby protecting the hydraulic system.

[0021] In some embodiments, optionally, the rock drilling hydraulic control system further comprises: a first pressure sensor arranged between the rotary motor and the reversing valve group and connected to the control device, for detecting the pressure of the oil entering the rotary motor; and / or a rotational speed sensor connected to the rotary motor and the control device respectively, for detecting the rotational speed of the rotary motor.

[0022] In the embodiment, the rock drilling hydraulic control system further comprises the first pressure sensor. The first pressure sensor is arranged between the rotary motor and the reversing valve group and connected to the control device, and can detect the pressure of the oil entering the rotary motor and send it to the control device. By arranging the first pressure sensor to detect the pressure of the hydraulic oil entering the rotary motor, the control device can be signaled in time when the rotary motor is stuck, so that the control valve group is disconnected by the control device, and the system is protected from continuing to supply oil to the rotary motor.

[0023] In some embodiments, the rock drilling hydraulic control system further comprises a rotation speed sensor, which is connected to the rotation motor and the control device respectively, and is used to detect the rotation speed of the rotation motor.

[0024] In this embodiment, the rock drilling hydraulic control system further comprises a rotation speed sensor, which is connected to the rotation motor and the control device respectively, and is used to detect the rotation speed of the rotation motor and send the rotation speed to the control device, so that the control device can react in time when the rotation motor is stuck, and protect the system.

[0025] In some embodiments, the rock drilling hydraulic control system further comprises a second pressure sensor, which is arranged between the advance oil cylinder and the reversing valve group, and is connected to the control device, and is used to detect the pressure of the oil entering the advance oil cylinder.

[0026] In this embodiment, the rock drilling hydraulic control system further comprises a second pressure sensor, which is arranged between the advance oil cylinder and the reversing valve group, and is connected to the control device, and is used to detect the pressure of the oil entering the advance oil cylinder and send the pressure to the control device. By arranging the second pressure sensor, the pressure of the oil delivered to the advance oil cylinder can be detected, so that the advance oil cylinder can be stopped by the control device in time when the advance oil cylinder is stuck.

[0027] In some embodiments, the rock drilling hydraulic control system further comprises a one-way valve group, which is arranged between the rock drill and the reversing valve group, and is used to prevent the oil in the rock drill from flowing back to the reversing valve group.

[0028] In this embodiment, the rock drilling hydraulic control system further comprises a one-way valve group, which is arranged between the rock drill and the reversing valve group, and is used to prevent the oil in the rock drill from flowing back to the reversing valve group. It can be understood that, due to the arrangement of the one-way valve group, the hydraulic oil can only be delivered from the reversing valve group to the rock drill, and the hydraulic oil in the rock drill cannot flow back to the reversing valve group from the one-way valve group, so that the impact pressure can be ensured when the rock drill is performing impact operation.

[0029] In some embodiments, the rock drilling hydraulic control system further comprises a pneumatic reversing valve, which is arranged between the pilot valve group and the reversing valve group, and is connected to the air source, and is used to control the conduction between the pilot valve group and the reversing valve group.

[0030] In this embodiment, the rock drilling hydraulic control system further comprises a gas control reversing valve. The gas control reversing valve is arranged between the pilot valve group and the reversing valve group, and is connected with the gas source, and can control the conduction between the pilot valve group and the reversing valve group. It can be understood that when the gas source delivers the protection gas to the rock drill, since the gas control reversing valve is connected with the gas source, the gas source can drive the gas control reversing valve to open, so that the pilot valve group and the reversing valve group are communicated, so that the reversing valve group can be reversed by the pilot valve group. If the gas source does not deliver the protection gas to the rock drill, the gas control reversing valve will not be opened, so that the pilot valve group and the reversing valve group will not be communicated, so that even if the control device controls the pilot valve group to work, the reversing valve group cannot work, and thus the system cannot work. The gas detection device and the gas control reversing valve provided in the present application can realize double protection, and when the connecting pipeline between the gas source and the rock drill fails, the pilot valve group can be controlled not to work by the detection result of the gas detection device, so as to protect the system.

[0031] The second aspect of the present application provides an engineering equipment, comprising the rock drilling hydraulic control system according to any one of the first aspect.

[0032] The engineering equipment provided by the present application comprises the rock drilling hydraulic control system according to any one of the first aspect. Since the engineering equipment provided by the present application comprises the rock drilling hydraulic control system according to any one of the first aspect, the engineering equipment provided by the present application also has all the beneficial technical effects of the rock drilling hydraulic control system according to any one of the first aspect, which will not be repeated here.

[0033] Additional aspects and advantages of the present application will become apparent in the description that follows, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0034] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description that follows, including the appended drawings, in which:

[0035] Fig. 1 shows a structural schematic diagram of a rock drilling hydraulic control system according to an embodiment of the present application;

[0036] Fig. 2 shows a block diagram of a rock drilling hydraulic control system according to an embodiment of the present application.

[0037] Correspondence between reference signs and component names in FIG. 1 and FIG. 2 is as follows: 1 actuator, 12 rotary motor, 14 rock drill, 16 push cylinder, 18 oil line, 2 control valve group, 22 pilot valve group, 222 pilot rotary valve group, 224 pilot impact valve group, 226 pilot push valve group, 24 reversing valve group, 242 first control valve group, 244 second control valve group, 246 third control valve group, 3 gas detection device, 4 first relief valve group, 42 high-pressure relief valve, 44 low-pressure relief valve, 5 second relief valve group, 52 rodless cavity relief valve, 54 rod cavity relief valve, 6 first pressure sensor, 7 rotation speed sensor, 8 second pressure sensor, 9 check valve group, 92 high-pressure check valve, 94 low-pressure check valve, 10 pneumatic reversing valve, 11 gas source, 13 power mechanism, 15 control device, 100 rock drilling hydraulic control system. DETAILED DESCRIPTION

[0038] In order to enable a more complete understanding of the above-mentioned objects, features and advantages of the present application, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0039] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and therefore the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0040] The rock drilling hydraulic control system and engineering equipment according to some embodiments of the present application are described below with reference to FIG. 1 and FIG. 2.

[0041] According to one embodiment of the first aspect of the present application, as shown in FIG. 1 and FIG. 2, the first aspect of the present application proposes a rock drilling hydraulic control system 100, comprising an actuator 1, a power mechanism 13, a control valve group 2, a gas detection device 3 and a control device 15. The power mechanism 13 is connected with the actuator 1 through an oil line 18, for providing power for the actuator 1. The control valve group 2 is arranged on the oil line 18, for controlling the conduction of the oil line 18. The gas detection device 3 is arranged in the actuator 1, for detecting the content of protective gas in the actuator 1. The control device 15 is connected with the control valve group 2 and the gas detection device 3 respectively, for controlling the working state of the control valve group 2 according to the detection result of the gas detection device 3.

[0042] The rock drilling hydraulic control system 100 provided in the application comprises an actuator 1, a power mechanism 13, a control valve group 2, a gas detection device 3 and a control device 15. The power mechanism 13 is connected with the actuator 1 through an oil pipeline 18, so as to provide power for the actuator 1 and make the actuator 1 work, for example, to provide hydraulic oil for the actuator 1. The control valve group 2 is arranged on the oil pipeline 18 and can control the conduction of the oil pipeline 18, so that when the actuator 1 does not need to work, the oil pipeline 18 between the actuator 1 and the power mechanism 13 can be disconnected through the control valve group 2. The gas detection device 3 is arranged on the actuator 1 and can detect the content of the protective gas in the actuator 1 and send it to the control device 15. When the gas detection device 3 detects that the content of the protective gas in the actuator 1 is insufficient, a signal can be sent to the control device 15, and the control device 15 makes the control valve group 2 disconnected, so that the power mechanism 13 does not work, thereby avoiding the situation that the actuator 1 works without protective gas and improving the service life of the equipment. At the same time, since the gas detection device 3 is arranged and connected with the control device 15, when the content of the protective gas in the actuator 1 is insufficient, the control valve group 2 can be closed in time through the control device 15, the reaction speed is fast, and the situation that the actuator 1 works without protective gas can be effectively avoided.

[0043] It can be understood that the working state of the control valve group 2 can be a conduction state and a disconnection state. The conduction state further comprises a plurality of conduction states.

[0044] In some embodiments, optionally, the gas detection device 3 comprises a gas pressure sensor.

[0045] In this embodiment, the gas pressure sensor is sensitive in reaction and can effectively detect the protective gas of the actuator 1.

[0046] In some embodiments, optionally, the gas detection device 3 is arranged at the gas inlet of the actuator 1.

[0047] In some embodiments, optionally, the protective gas is nitrogen.

[0048] In some embodiments, optionally, the actuator 1 comprises a rotary motor 12, a rock drill 14 and a push oil cylinder 16, the gas detection device 3 is arranged on the rock drill 14; the control valve group 2 comprises a pilot valve group 22 and a reversing valve group 24, the power mechanism 13 is further used for providing power for the reversing of the reversing valve group 24, the pilot valve group 22 is arranged on the oil pipeline 18 between the power mechanism 13 and the reversing valve group 24 and is used for adjusting the reversing direction of the reversing valve group 24.

[0049] In this embodiment, the actuator 1 comprises a rotary motor 12, a rock drill 14 and a push cylinder 16. The gas detection device 3 is arranged on the rock drill 14 and can detect the content of the protective gas in the rock drill 14. The control valve group 2 comprises a pilot valve group 22 and a reversing valve group 24. The power mechanism 13 can provide power for the reversing valve group 24, so that the reversing valve group 24 is reversed, thereby enabling the power mechanism 13 to deliver the hydraulic oil provided by the power mechanism 13 to the actuator 1 through different oil pipelines 18 to realize different actions of the actuator 1. For example, the rotary motor 12 is enabled to rotate forward or reverse, the rock drill 14 is enabled to work at high pressure or low pressure, and the push cylinder 16 is enabled to move forward or backward. At the same time, by arranging the pilot valve group 22, the power provided by the power mechanism 13 can be prevented from always acting on the reversing valve group 24, thereby failing to realize the reversing. By arranging the pilot valve group 22, the reversing direction of the reversing valve group 24 can be adjusted according to the actual situation to meet the actual use requirements.

[0050] In some embodiments, optionally, the reversing valve group 24 comprises a hydraulic control reversing valve group.

[0051] In this embodiment, the reversing valve group 24 can be a hydraulic control reversing valve group, thereby enabling the hydraulic control reversing valve group to be controlled by the hydraulic oil provided by the power mechanism 13 to realize the reversing.

[0052] It can be understood that the power mechanism 13 can not only provide power for the actuator 1, but also provide power for the reversing of the reversing valve group 24.

[0053] In some embodiments, optionally, the control device 15 is connected with the pilot valve group 22 and the gas detection device 3 respectively, and is used to control the working state of the pilot valve group 22 according to the detection result of the gas detection device 3.

[0054] In this embodiment, the control device 15 is connected with the pilot valve group 22 and the gas detection device 3 respectively, and can control the working state of the pilot valve group 22 according to the detection result of the gas detection device 3. It can be understood that the reversing valve group 24 is in a disconnected state in a non-working state, and needs to be controlled by the pilot valve group 22 to realize the reversing when working, so that the oil pipeline 18 is conducted, thereby realizing the working of the actuator 1. Therefore, the control device 15 is connected with the pilot valve group 22 and the gas detection device 3 respectively in the present application, the working state of the pilot valve group 22 can be controlled according to the detection result of the gas detection device 3, the pilot valve group 22 is controlled to work when it is detected that the content of the protective gas reaches the preset requirement, thereby enabling the reversing valve group 24 to realize the reversing to realize the working of the actuator 1. It can be understood that the oil pipeline 18 can be conducted only when the content of the protective gas in the actuator 1 reaches the preset requirement in the present application, thereby enabling the actuator 1 to work, thereby being able to protect the equipment.

[0055] In some embodiments, the control device 15 can also be connected with the reversing valve group 24 and the gas detection device 3 respectively, for controlling the working state of the reversing valve group 24 according to the detection result of the gas detection device 3.

[0056] In some embodiments, the reversing valve group 24 includes: a first control valve group 242 arranged on the oil pipeline 18 between the rotary motor 12 and the power mechanism 13; a second control valve group 244 arranged on the oil pipeline 18 between the rock drill 14 and the power mechanism 13; and a third control valve group 246 arranged on the oil pipeline 18 between the propulsion oil cylinder 16 and the power mechanism 13.

[0057] In this embodiment, the reversing valve group 24 includes the first control valve group 242, the second control valve group 244 and the third control valve group 246. The first control valve group 242 is arranged on the oil pipeline 18 between the rotary motor 12 and the power mechanism 13, and can control the on-off of the oil pipeline 18 between the rotary motor 12 and the power mechanism 13, and the transmission direction of the hydraulic oil, so that the rotary motor 12 can realize forward rotation and reverse rotation. The second control valve group 244 is arranged on the oil pipeline 18 between the rock drill 14 and the power mechanism 13, and can control the on-off of the oil pipeline 18, and control one of the high-pressure hydraulic oil and the low-pressure hydraulic oil to enter the rock drill 14, thereby realizing high-pressure impact operation or low-pressure impact operation. The third control valve group 246 is arranged on the oil pipeline 18 between the propulsion oil cylinder 16 and the power mechanism 13, and can control the on-off of the oil pipeline 18, and control whether the hydraulic oil enters from the rodless chamber of the hydraulic cylinder or from the rod chamber, thereby realizing the extension or retraction of the hydraulic cylinder. By arranging the reversing valve group 24 as three control valve groups 2 to control the rotary motor 12, the rock drill 14 and the propulsion oil cylinder 16 respectively, the rotary motor 12, the rock drill 14 and the propulsion oil cylinder 16 can work independently, and the working effect can also be ensured.

[0058] In some embodiments, the pilot valve group 22 includes a pilot rotary valve group 222, a pilot impact valve group 224 and a pilot propulsion valve group 226. The pilot rotary valve group 222 is connected with the first control valve group 242, and can control the reversing of the first control valve group 242. The pilot impact valve group 224 is connected with the second control valve group 244, and can control the reversing of the second control valve group 244. The pilot propulsion valve group 226 is connected with the third control valve group 246, and can control the reversing of the third control valve group 246.

[0059] In some embodiments, the rock drilling hydraulic control system 100 further includes: a first overflow valve group 4 arranged between the rock drill 14 and the reversing valve group 24; and a second overflow valve group 5 arranged between the propulsion oil cylinder 16 and the reversing valve group 24.

[0060] In this embodiment, the rock drilling hydraulic control system 100 further comprises a first overflow valve group 4 and a second overflow valve group 5. The first overflow valve group 4 is arranged between the rock drill 14 and the directional valve group 24, and can eliminate the instantaneous high pressure generated by the hydraulic oil input into the rock drill 14, thereby protecting the hydraulic system. The second overflow valve group 5 is arranged between the advance cylinder 16 and the directional valve group 24, and can eliminate the instantaneous high pressure generated by the hydraulic oil input into the advance cylinder 16, thereby protecting the hydraulic system.

[0061] In some embodiments, the first overflow valve group 4 comprises a high pressure overflow valve 42 and a low pressure overflow valve 44, the high pressure overflow valve 42 is used for protection when the rock drill 14 performs high pressure impact operation, and the low pressure overflow valve 44 is used for protection when the rock drill 14 performs low pressure impact operation.

[0062] In some embodiments, the second overflow valve group 5 comprises a rodless cavity overflow valve 52 and a rod cavity overflow valve 54, the rodless cavity overflow valve 52 is connected with the oil port of the rodless cavity, and the rod cavity overflow valve 54 is connected with the oil port of the rod cavity.

[0063] In this embodiment, by arranging the rodless cavity overflow valve 52 and the rod cavity overflow valve 54, protection can be performed when the advance cylinder 16 extends and retracts.

[0064] In some embodiments, the rock drilling hydraulic control system 100 further comprises a first pressure sensor 6 arranged between the rotary motor 12 and the directional valve group 24, and connected with the control device 15, for detecting the pressure of the oil entering the rotary motor 12; and / or a rotation speed sensor 7 connected with the rotary motor 12 and the control device 15 respectively, for detecting the rotation speed of the rotary motor 12.

[0065] In this embodiment, the rock drilling hydraulic control system 100 further comprises the first pressure sensor 6. The first pressure sensor 6 is arranged between the rotary motor 12 and the directional valve group 24, and connected with the control device 15, and can detect the pressure of the oil entering the rotary motor 12 and send it to the control device 15. By arranging the first pressure sensor 6 to detect the pressure of the hydraulic oil entering the rotary motor 12, when the rotary motor 12 is stuck, the control device 15 can be timely signaled to disconnect the control valve group 2, thereby avoiding continuous oil supply to the rotary motor 12, and protecting the system.

[0066] In some embodiments, the rock drilling hydraulic control system 100 further comprises a rotation speed sensor 7 connected with the rotary motor 12 and the control device 15 respectively, for detecting the rotation speed of the rotary motor 12.

[0067] In this embodiment, the rock drilling hydraulic control system 100 further comprises a rotation speed sensor 7. The rotation speed sensor 7 is connected with the rotary motor 12 and the control device 15 respectively, and can detect the rotation speed of the rotary motor 12 and send the same to the control device 15, so that the control device 15 can react in time when the rotary motor 12 is stuck, thereby protecting the system.

[0068] In some embodiments, optionally, the rock drilling hydraulic control system 100 further comprises a second pressure sensor 8 arranged between the advance oil cylinder 16 and the reversing valve group 24 and connected with the control device 15, for detecting the pressure of the oil entering the advance oil cylinder 16.

[0069] In this embodiment, the rock drilling hydraulic control system 100 further comprises a second pressure sensor 8. The second pressure sensor 8 is arranged between the advance oil cylinder 16 and the reversing valve group 24 and connected with the control device 15, and can detect the pressure of the oil entering the advance oil cylinder 16 and send the same to the control device 15. By arranging the second pressure sensor 8, the pressure of the oil delivered into the advance oil cylinder 16 can be detected, so that the advance oil cylinder 16 can be stopped by the control device 15 in time when the advance oil cylinder 16 is stuck.

[0070] In some embodiments, optionally, two second pressure sensors 8 are arranged, and the two second pressure sensors 8 are respectively communicated with the rodless chamber and the rod chamber of the advance oil cylinder 16. In this way, the pressure when the advance oil cylinder 16 is extended and the pressure when the advance oil cylinder 16 is retracted can be detected.

[0071] In some embodiments, optionally, the rock drilling hydraulic control system 100 further comprises a one-way valve group 9 arranged between the rock drill 14 and the reversing valve group 24, for preventing the oil in the rock drill 14 from flowing back to the reversing valve group 24.

[0072] In this embodiment, the rock drilling hydraulic control system 100 further comprises a one-way valve group 9. The one-way valve group 9 is arranged between the rock drill 14 and the reversing valve group 24, and can prevent the oil in the rock drill 14 from flowing back to the reversing valve group 24. It can be understood that, due to the arrangement of the one-way valve group 9, the hydraulic oil can only be delivered from the reversing valve group 24 to the rock drill 14, and the hydraulic oil in the rock drill 14 cannot flow back to the reversing valve group 24 from the one-way valve group 9, so that the impact pressure can be ensured when the rock drill 14 is performing impact operation.

[0073] In some embodiments, optionally, the one-way valve group 9 comprises a high-pressure one-way valve 92 and a low-pressure one-way valve 94. When the rock drill 14 is performing high-pressure impact operation, the hydraulic oil is delivered to the rock drill 14 through the high-pressure one-way valve 92. When the rock drill 14 is performing low-pressure impact operation, the hydraulic oil is delivered to the rock drill 14 through the low-pressure one-way valve 94.

[0074] In some embodiments, the rock drilling hydraulic control system 100 further comprises an air control reversing valve 10, which is arranged between the pilot valve group 22 and the reversing valve group 24 and is connected with the air source 11, for controlling the conduction between the pilot valve group 22 and the reversing valve group 24.

[0075] In this embodiment, the rock drilling hydraulic control system 100 further comprises the air control reversing valve 10. The air control reversing valve 10 is arranged between the pilot valve group 22 and the reversing valve group 24 and is connected with the air source 11, and can control the conduction between the pilot valve group 22 and the reversing valve group 24. It can be understood that when the air source 11 delivers the protection gas to the rock drill 14, since the air control reversing valve 10 is connected with the air source 11, the air source 11 can drive the air control reversing valve 10 to open, so that the pilot valve group 22 and the reversing valve group 24 are communicated, so that the reversing valve group 24 can be reversed by the pilot valve group 22. If the air source 11 does not deliver the protection gas to the rock drill 14, the air control reversing valve 10 will not be opened, so that the pilot valve group 22 and the reversing valve group 24 will not be communicated, so that even if the control device 15 controls the pilot valve group 22 to work, the reversing valve group 24 cannot work, and thus the system cannot operate. The present application can realize double protection by arranging the gas detection device 3 and the air control reversing valve 10, and when the connecting pipeline between the air source 11 and the rock drill 14 fails, the pilot valve group 22 can be controlled not to work by the detection result of the gas detection device 3, so as to protect the system.

[0076] In some embodiments, the pilot valve group 22 comprises an electric control pilot valve group.

[0077] According to one embodiment of the first aspect of the application, a rock drilling hydraulic control system 100 is provided, which is equipped with a rotational speed sensor 7 and a hydraulic pressure sensor (first pressure sensor 6) for a rotary motor 12, a hydraulic pilot valve is changed into an electric pilot valve (pilot valve group 22), and a signal triggered by the sensor is transmitted to the electric pilot valve to change the direction of the main valve, so that the rock drill 14 is not drilled and retreated in time when it is stuck, thereby protecting the drill rod. In order to prevent the rock drill 14 from working without nitrogen, a gas pressure sensor (gas detection device 3) is added to the air inlet of the rock drill 14, and a gas control reversing valve 10 is added to the oil inlet of the electric pilot valve. Through these two protections, the internal damage of the rock drill 14 can be avoided. A set of high and low pressure impact relief valve group (first relief valve group 4) is added to the rock drilling impact circuit, which plays a buffering protection role when the rock drill 14 is working under high and low pressure impact and has a layer of rock, thereby protecting the rock drill 14 itself. A push relief valve group (second relief valve group 5) is added to the rock drilling push circuit, and a hydraulic pressure sensor (second pressure sensor 8) is also added to the circuit, which plays a pressure protection role at the moment of sticking, so that the drill rod can be retreated in time and the drill rod will not be bent. When retreating, the drill rod is prevented from being pulled out of the rock drill 14 and left in the rock hole.

[0078] It can be understood that the application increases sensors, relief valve groups, reversing valve groups 24 and other elements in the hydraulic system, which work together to make the rock drill 14 more stable and effective during operation.

[0079] Specifically, the rotary motor 12 circuit is respectively equipped with a hydraulic pressure sensor to detect the oil pressure when the motor is rotating forward or reversing. The rock drilling impact oil inlet is equipped with a high and low pressure impact relief valve group to protect against overpressure during impact operation. The air inlet of the rock drill 14 is equipped with a gas pressure sensor to detect whether there is a continuous nitrogen source 11 input during the operation of the rock drill 14. The oil inlet of the electric pilot valve is equipped with a gas control reversing valve 10 to ensure that the rock drilling impact operation can only be performed when the nitrogen enters the rock drill 14. The rock drilling push circuit is equipped with a hydraulic pressure sensor to detect the pressure increase when stuck, so that the drill rod can be retreated in time or stopped in time when retreating. The push relief valve group prevents the drill rod from bending or separating from the rock drill 14 due to excessive pressure.

[0080] The working principle of the rock drilling hydraulic control system 100 will be introduced as follows:

[0081] As shown in Figure 1, when there is a gas source 11 into the system, pneumatic control reversing valve 10 open, electric control pilot valve group (pilot valve group 22) with oil into, at this time can operate electric control pilot valve group to make hydraulic control reversing valve group (reversing valve group 24) work, let high pressure oil into the rotating motor 12, rock drilling impact (rock drill 14) and rock drilling propulsion (pushing cylinder 16) and other actuators (actuator 1), make it work. But if the gas pressure sensor (gas detection device 3) fails to detect gas into the rock drill 14, the gas pressure sensor sends a signal, so that the electromagnet DT1, DT2, DT3, DT4, DT5 and DT6 of the electric control pilot valve group cannot be electrified, and the motor rotation, rock drilling impact and rock drilling propulsion are not actuated.

[0082] When the gas pressure sensor detects that gas enters the rock drill 14, a signal is sent to the control device 15, and the electric control pilot valve group is controlled, the hydraulic control reversing valve group starts to work, and at the same time the rotating motor 12, rock drilling impact and rock drilling propulsion start to work. When the rotating motor 12 is stuck, the motor speed sensor 7 sends a signal, and at the same time the pressure sensor of the rotating motor 12 inlet reaches the alarm value and sends a signal, the signals act on the electromagnets DT6 and DT5 of the electric control pilot valve group, the electromagnet DT6 loses power and the electromagnet DT5 gets power. After the electromagnet DT6 loses power, the rock drilling propulsion stops advancing, the electromagnet DT5 gets power, and the rock drilling retraction starts to work.

[0083] At the same time of rock drilling impact or rotating motor 12 stuck, the rock drilling propulsion oil way hydraulic pressure sensor detection will also rise to the alarm value, the signals act on the electromagnets DT6 and DT5 of the electric control pilot valve group, the electromagnet DT6 loses power and the electromagnet DT5 gets power. After the electromagnet DT6 loses power, the rock drilling propulsion stops advancing, the electromagnet DT5 gets power, and the rock drilling retraction starts to work.

[0084] When DT4 of the electric control pilot valve group gets power, rock drilling high pressure impact operation, high pressure check valve 92 (C1) is conducted and works, and when transient high pressure appears, d1 overflow valve of high-low pressure impact overflow valve group (first overflow valve group 4) overflows, which protects the system. When DT3 of the electric control pilot valve group gets power, this triggers DT8 of the high-low pressure impact overflow valve group to get power, and rock drilling low pressure impact operation, low pressure check valve 94 (C2) is conducted and works, and when transient high pressure appears, d2 overflow valve of high-low pressure impact overflow valve group overflows, which protects the system.

[0085] When the rock drilling impact or rotary motor 12 is stuck, the push cylinder 16 continues to advance, the push oil cylinder inlet pressure rises, in order to ensure that the pressure rises and the drill rod does not bend, the push relief valve group (the second relief valve group 5) d3 relief valve relief, so that the push pressure is kept at the pressure at which the drill rod deforms. When retreating, the solenoid DT5 of the electric control pilot valve group is electrified, at the same time the DT7 of the push relief valve group is electrified, if stuck occurs, the push oil cylinder inlet pressure rises, in order to ensure that the pressure rises and the drill rod does not come off the rock drill 14, the d4 relief valve of the push relief valve group relieves, so that the drill rod retreats within the safe pressure range.

[0086] Wherein, a1 of the first control valve group 242 in Figure 1 is connected with a1 of the pilot rotary valve group 222, b1 of the first control valve group 242 is connected with b1 of the pilot rotary valve group 222. Similarly, a2 of the second control valve group 244 is connected with a2 of the pilot impact valve group 224, b2 of the second control valve group 244 is connected with b2 of the pilot impact valve group 224. a3 of the third control valve group 246 is connected with a3 of the pilot push valve group 226, b3 of the third control valve group 246 is connected with b3 of the pilot push valve group 226. C represents the one-way valve group 9. A1 represents the inlet oil pipeline when the rotary motor 12 is reversely transmitted, B1 represents the inlet oil pipeline when the rotary motor 12 is positively transmitted. A2 represents the inlet oil pipeline when the rock drill 14 is working at low pressure impact, B2 represents the inlet oil pipeline when the rock drill 14 is working at high pressure impact. A3 represents the inlet oil pipeline when the push cylinder 16 is retracting, B3 represents the inlet oil pipeline when the push cylinder 16 is extending. Z represents the oil supply port of the directional valve group 24 to the pilot valve group 22. M represents the pressure measuring port of the directional valve group 24. P represents the inlet port of the directional valve group 24. R represents the return port of the directional valve group 24. T represents the drain port of the directional valve group 24.

[0087] The key point of the present application is:

[0088] 1. The stuck of the rotary motor 12 or rock drilling impact is detected by the sensor, and is automatically adjusted by the electric signal transmission control.

[0089] 2. The inlet oil of the rock drilling impact and rock drilling push is increased by the relief valve group, which timely eliminates the instantaneous high pressure, so that the hydraulic system and the drill rod are protected.

[0090] 3. The inlet oil of the electric control pilot valve is increased by the pneumatic directional valve 10, and the sensor detection of the rock drill 14 is increased, so that the impact operation can be carried out only when there is gas protection in the rock drill 14, which protects the inside of the rock drill 14.

[0091] The second aspect of the present application provides an engineering equipment, comprising: the rock drilling hydraulic control system according to any one of the first aspect.

[0092] The engineering equipment provided in the present application comprises the rock drilling hydraulic control system in any one of the first aspect. Since the engineering equipment provided in the present application comprises the rock drilling hydraulic control system in any one of the first aspect, the engineering equipment provided in the present application also has all the beneficial technical effects of the rock drilling hydraulic control system in any one of the first aspect, which will not be repeated here.

[0093] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integral connection; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0094] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0095] The above is only optional embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A hydraulic control system for rock drilling, characterized in that The system comprises: an actuator; a power mechanism connected to the actuator through an oil line for providing power to the actuator; a control valve group arranged on the oil line for controlling the conduction of the oil line; a gas detection device arranged in the actuator for detecting the content of protective gas in the actuator; a control device connected to the control valve group and the gas detection device respectively for controlling the working state of the control valve group according to the detection result of the gas detection device.

2. The rock drilling hydraulic control system according to claim 1, wherein: the actuator comprises a rotary motor, a rock drill and a thrust cylinder, and the gas detection device is arranged in the rock drill; the control valve group comprises a pilot valve group and a reversing valve group, and the power mechanism is further used for providing power for the reversing of the reversing valve group, and the pilot valve group is arranged on the oil line between the power mechanism and the reversing valve group for adjusting the reversing direction of the reversing valve group.

3. The rock drilling hydraulic control system according to claim 2, wherein: the control device is connected to the pilot valve group and the gas detection device respectively for controlling the working state of the pilot valve group according to the detection result of the gas detection device.

4. The hydraulic rock drilling control system of claim 2, characterized in that, the reversing valve group comprises: a first control valve group arranged on the oil line between the rotary motor and the power mechanism; a second control valve group arranged on the oil line between the rock drill and the power mechanism; a third control valve group arranged on the oil line between the thrust cylinder and the power mechanism.

5. The hydraulic rock drilling control system of claim 2, characterized in that, Further comprising: a first overflow valve group arranged between the rock drill and the reversing valve group; a second overflow valve group arranged between the thrust cylinder and the reversing valve group.

6. The hydraulic rock drilling control system of claim 2, characterized in that, Further comprising: a first pressure sensor arranged between the rotary motor and the reversing valve group and connected to the control device for detecting the pressure of the oil entering the rotary motor; and / or a rotation speed sensor connected to the rotary motor and the control device respectively for detecting the rotation speed of the rotary motor.

7. The hydraulic rock drilling control system of claim 2, characterized in that, Further comprising: a second pressure sensor arranged between the thrust cylinder and the reversing valve group and connected to the control device for detecting the pressure of the oil entering the thrust cylinder.

8. The hydraulic rock drilling control system of claim 2, characterized in that, Further comprising: a check valve group arranged between the rock drill and the reversing valve group for preventing the backflow of the oil in the rock drill to the reversing valve group.

9. A hydraulic rock drilling control system according to any one of claims 2 to 8, characterized in that, Further comprising: a pneumatic reversing valve arranged between the pilot valve group and the reversing valve group and connected to a gas source for controlling the conduction between the pilot valve group and the reversing valve group.

10. An engineering apparatus characterised in that, The system comprises: the rock drilling hydraulic control system according to any one of claims 1 to 9.

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