CN114321060B - Automatic control valve group and control system for rock drilling - Google Patents
Automatic control valve group and control system for rock drilling Download PDFInfo
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- CN114321060B CN114321060B CN202111534925.0A CN202111534925A CN114321060B CN 114321060 B CN114321060 B CN 114321060B CN 202111534925 A CN202111534925 A CN 202111534925A CN 114321060 B CN114321060 B CN 114321060B
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- 238000005553 drilling Methods 0.000 title claims abstract description 115
- 239000011435 rock Substances 0.000 title claims abstract description 114
- 239000003921 oil Substances 0.000 claims abstract description 379
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 52
- 238000013016 damping Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000003595 mist Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims 8
- 238000010276 construction Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 18
- 238000005461 lubrication Methods 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000012840 feeding operation Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to an automatic rock drilling control valve bank and a control system, wherein a first oil port externally connected with a hydraulic pump, a second oil port externally connected with a hydraulic oil tank, a third oil port externally connected with a hydraulic pump, a sixth oil port externally connected with a rodless cavity of a hydraulic oil cylinder, a seventh oil port externally connected with a rod cavity of the hydraulic oil cylinder, a fourth oil port for adjusting the hydraulic proportion between the rod cavity and the rodless cavity in the hydraulic oil cylinder, a fifth oil port for detecting the oil pressure in the rod-less cavity of the hydraulic oil cylinder and an eighth oil port externally connected with impact equipment are arranged on the automatic rock drilling control valve bank.
Description
Technical Field
The invention relates to the technical field of driving control of rock drilling equipment, in particular to an automatic rock drilling control valve group and a control system.
Background
Currently, in the rock drilling construction process, operators are required to control the feeding and returning, rotation, impact, water supply, oil mist lubrication and other operations of equipment, the number of switches or handles to be controlled is large, if the control time or force is not good, the situation of drill clamping (namely drill clamping) is easy to occur, the drill clamping can cause damage or damage to components, and the construction efficiency is seriously affected due to time consuming of misoperation. In addition, in the construction process, operators have a plurality of contents to operate and control, have high labor intensity, especially operate such as water supply, oil mist lubrication and the like, cannot realize cooperative control generally, and easily cause the problems of waste and water accumulation due to normally open equipment or influence the service lives of the rock drill and the drill rod due to poor lubrication due to normally closed equipment.
Aiming at the problems of easy occurrence of drill rod blocking accidents, low automation degree and high operation strength in the rock drilling process in the related technology, no effective solution is provided at present.
Therefore, the inventor provides a rock drilling automatic control valve group and a control system by virtue of experience and practice of related industries for many years so as to overcome the defects of the prior art.
Disclosure of Invention
The invention aims to provide an automatic rock drilling control valve group and a control system, which are used for improving the intelligent degree of composite control in the rock drilling construction process, automatically identifying potential risk of drill rod clamping, automatically controlling drill rod clamping prevention, effectively avoiding the occurrence of drill rod clamping, improving the construction efficiency and prolonging the service life of equipment.
The invention further aims to provide the automatic rock drilling control valve group and the control system, which can effectively solve the defects of high composite control difficulty and high strength in the rock drilling construction process, effectively reduce the labor intensity of operators and improve the construction efficiency.
The aim of the invention can be achieved by adopting the following technical scheme:
The invention provides a rock drilling automatic control valve bank, which is provided with a first oil port externally connected with a hydraulic pump, a second oil port externally connected with a hydraulic oil tank, a third oil port externally connected with a hydraulic pump, a sixth oil port externally connected with a rodless cavity of a hydraulic oil cylinder, a seventh oil port externally connected with a rod cavity of the hydraulic oil cylinder, a fourth oil port for adjusting the hydraulic proportion between the rod cavity and the rodless cavity in the hydraulic oil cylinder, a fifth oil port for detecting the oil pressure in the rodless cavity of the hydraulic oil cylinder and an eighth oil port externally connected with impact equipment, wherein the hydraulic oil port comprises a first oil port, a second oil port, a third oil port, a sixth oil port, a seventh oil port, a fourth oil port, a fifth oil port and an eighth oil port, wherein the first oil port is used for detecting the oil pressure in the rodless cavity of the hydraulic oil cylinder:
The automatic rock drilling control valve group comprises a proportional overflow valve, a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve and a fifth reversing valve, wherein the first oil port is respectively connected with an oil inlet of the first reversing valve and an oil inlet of the second reversing valve, an oil outlet of the second reversing valve is connected with the eighth oil port, an oil return port of the first reversing valve is connected with the second oil port, a first working oil port and a second working oil port of the first reversing valve are respectively connected with the sixth oil port and the seventh oil port, the fourth oil port is respectively connected with an oil inlet of the proportional overflow valve and an oil outlet of the third reversing valve, an oil outlet of the proportional overflow valve is connected with the second oil port, an oil inlet of the third reversing valve is respectively connected with an oil outlet of the fourth reversing valve and an oil outlet of the fifth reversing valve, an oil inlet of the fourth reversing valve is respectively connected with the seventh oil port and the second oil port, and an oil inlet of the fifth reversing valve are respectively connected with the sixth oil port and the sixth oil port; the fifth oil port is externally connected with a first pressure sensor, and is respectively connected with the sixth oil port, the oil inlet of the fifth reversing valve and the first working oil port of the first reversing valve.
In a preferred embodiment of the present invention, the automatic rock drilling control valve set further includes a sixth reversing valve, an oil inlet of the sixth reversing valve is connected to an oil outlet of the second reversing valve, and an oil outlet of the sixth reversing valve is connected to the second oil port.
In a preferred embodiment of the present invention, the first reversing valve is a three-position four-way reversing valve; the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are all two-position two-way electromagnetic reversing valves.
In a preferred embodiment of the present invention, the automatic rock drilling control valve set further includes a first pressure reducing valve disposed between the first oil port and the second reversing valve, an oil inlet of the first pressure reducing valve is connected to the first oil port, and an oil outlet of the first pressure reducing valve is connected to an oil inlet of the second reversing valve.
In a preferred embodiment of the present invention, the automatic rock drilling control valve set further includes a first damper, a first overflow valve, and a first check valve, where an oil port of the first damper is connected to an oil outlet of the second reversing valve, an external control port of the first pressure reducing valve is connected to another oil port of the first damper, an oil inlet of the sixth reversing valve, an oil inlet of the first overflow valve, and an inlet of the first check valve, an oil outlet of the first overflow valve is connected to the second oil port, and an outlet of the first check valve is connected to the third oil port.
In a preferred embodiment of the present invention, the automatic rock drilling control valve set further includes a second overflow valve disposed between the second oil port and the sixth reversing valve, an oil inlet of the second overflow valve is connected to an oil outlet of the sixth reversing valve, and an oil outlet of the second overflow valve is connected to the second oil port.
In a preferred embodiment of the present invention, the automatic rock drilling control valve set further includes a third overflow valve and a fourth overflow valve, an oil inlet of the third overflow valve is connected to the seventh oil port, an oil outlet of the fourth reversing valve, and a second working oil port of the first reversing valve, and an oil outlet of the third overflow valve is connected to the second oil port; the oil inlet of the fourth overflow valve is respectively connected with the sixth oil port, the oil outlet of the fifth reversing valve and the first working oil port of the first reversing valve, and the oil outlet of the fourth overflow valve is connected with the second oil port.
In a preferred embodiment of the present invention, the automatic rock drilling control valve set further includes a second damper, a third damper, and a second check valve, where an oil port of the second damper is connected to an oil outlet of the fourth reversing valve, and another oil port of the second damper is connected to an oil inlet of the third reversing valve and an inlet of the second check valve, respectively; an oil port of the third damper is connected with an oil outlet of the fifth reversing valve, the other oil port of the third damper is connected with an oil inlet of the third reversing valve and an inlet of the second one-way valve respectively, and an outlet of the second one-way valve is connected with the third oil port.
In a preferred embodiment of the present invention, the automatic rock drilling control valve set further includes a second pressure reducing valve and a fifth overflow valve, an oil inlet of the second pressure reducing valve is connected to the first oil port, an oil outlet of the second pressure reducing valve is connected to an oil inlet of the first reversing valve, an external control port of the second pressure reducing valve is connected to an oil inlet of the fifth overflow valve, an inlet of the second one-way valve and an oil inlet of the third reversing valve, respectively, and an oil outlet of the fifth overflow valve is connected to the second oil port.
The invention provides a control system which comprises a hydraulic pump, a hydraulic oil tank, a hydraulic oil cylinder, impact equipment and the automatic rock drilling control valve bank, wherein the hydraulic pump is respectively connected with a first oil port and a third oil port of the automatic rock drilling control valve bank, the hydraulic oil tank is connected with a second oil port of the automatic rock drilling control valve bank, the impact equipment is connected with an eighth oil port of the automatic rock drilling control valve bank, a sixth oil port and a seventh oil port of the automatic rock drilling control valve bank are respectively connected with a rodless cavity of the hydraulic oil cylinder and a rod-containing cavity of the hydraulic oil cylinder, a fifth oil port of the automatic rock drilling control valve bank is connected with a first pressure sensor, and the first pressure sensor is connected with the rodless cavity of the hydraulic oil cylinder.
In a preferred embodiment of the present invention, the control system further includes a front stroke limiting device disposed in front of the rock drilling apparatus and a rear stroke limiting device disposed behind the rock drilling apparatus, wherein a rock drilling limiting point and a return support limiting point are respectively provided in front of and behind the rock drilling apparatus, the front stroke limiting device is mounted on the rock drilling limiting point, and the rear stroke limiting device is mounted on the return support limiting point.
In a preferred embodiment of the present invention, the impact device is connected with a water delivery pipeline and an oil mist input pipeline, and the water delivery pipeline and the oil mist input pipeline are respectively provided with an electromagnetic ball valve and a seventh reversing valve.
In a preferred embodiment of the present invention, the seventh reversing valve is a two-position two-way solenoid valve.
In a preferred embodiment of the present invention, the control system further includes a rotary motor, a second pressure sensor is disposed at a forward rotation oil port of the rotary motor, and the rotary motor is connected to the control system through a multiple-way valve.
From the above, the automatic control valve group for rock drilling and the control system have the characteristics and advantages that: the automatic rock drilling control valve bank is provided with a plurality of oil ports, a first oil port and a third oil port of the automatic rock drilling control valve bank are respectively connected with the hydraulic pump, a second oil port is connected with the hydraulic oil tank, an eighth oil port is connected with the impact equipment, a sixth oil port and a seventh oil port are respectively connected with a rodless cavity of the hydraulic oil cylinder and a rod-containing cavity of the hydraulic oil cylinder, a fifth oil port is connected with a first pressure sensor, the first pressure sensor is connected with the rodless cavity of the hydraulic oil cylinder, the working states of all reversing valves in the automatic rock drilling control valve bank are controlled, oil can be further supplied into the valve bank through the hydraulic pump and output into the hydraulic oil cylinder and the impact equipment, and the hydraulic oil cylinder is controlled to perform rock drilling feeding operation, and synchronous operation of rock drilling feeding, rotation, impact, water supply and lubrication can be realized; the invention improves the intelligent degree of composite control in the rock drilling construction process, automatically identifies the potential risk of the drill rod, automatically performs the drill rod blocking prevention control, effectively avoids the occurrence of the drill rod blocking, improves the construction efficiency and prolongs the service life of equipment; the invention can solve the defects of high difficulty and high intensity of composite control in the rock drilling construction process, effectively reduces the labor intensity of operators and improves the construction efficiency.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention.
Wherein:
Fig. 1: the invention discloses a structural schematic diagram of an automatic rock drilling control valve group.
Fig. 2: is a schematic structural diagram of the control system of the invention.
Fig. 3: the connection structure diagram of the rotary motor in the control system is shown.
The reference numerals in the invention are:
1. a proportional overflow valve; 2. A third reversing valve;
3. A fourth reversing valve; 4. A third overflow valve;
5. A fourth overflow valve; 6. A sixth reversing valve;
7. a first damping; 8. A second reversing valve;
9. A first pressure reducing valve; 10. A first overflow valve;
11. a first one-way valve; 12. A second overflow valve;
13. a first reversing valve; 14. A second pressure reducing valve;
15. a fifth overflow valve; 16. A second one-way valve;
17. a second damping; 18. A third damping;
19. a fifth reversing valve; 20. A hydraulic cylinder;
21. An electromagnetic ball valve; 22. A seventh reversing valve;
23. an impact device; 24. A first pressure sensor;
25. a second pressure sensor; 26. A rotary motor;
27. A multiway valve; p, a first oil port;
T, a second oil port; LS and a third oil port;
G. a fourth oil port; MA1, five oil ports;
a1, a sixth oil port; b1, a seventh oil port;
A2, an eighth oil port.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings.
In the present invention, the terms indicating the left, right, etc. refer to the left, right, etc. directions in fig. 1, and are described herein.
Embodiment one
As shown in fig. 1 and 2, the present invention provides an automatic rock drilling control valve group, on which a first oil port P, a second oil port T, a third oil port LS, a fourth oil port G, a fifth oil port MA1, a sixth oil port A1, a seventh oil port B1, and an eighth oil port A2 are provided, the first oil port P and the third oil port LS are respectively used for connecting with an external hydraulic pump, the second oil port T is used for connecting with an external hydraulic tank, the sixth oil port A1 is used for connecting with a rodless cavity of the external hydraulic cylinder 20, the seventh oil port B1 is used for connecting with a rod cavity of the external hydraulic cylinder 20, the fifth oil port MA1 is used for connecting with an external first pressure sensor 24 and detecting an oil pressure in the rodless cavity of the hydraulic cylinder 20, the fourth oil port G is used for adjusting a hydraulic ratio of the rod cavity to the rodless cavity in the hydraulic cylinder 20, and the eighth oil port a is used for connecting with an external impact device 23. Wherein: the rock drilling automatic control valve group comprises a proportional overflow valve 1, a first reversing valve 13, a second reversing valve 8, a third reversing valve 2, a fourth reversing valve 3 and a fifth reversing valve 19, wherein the first oil port P is respectively connected with an oil inlet of the first reversing valve 13 and an oil inlet of the second reversing valve 8, an oil outlet of the second reversing valve 8 is connected with an eighth oil port A2, an oil return port of the first reversing valve 13 is connected with a second oil port T, a first working oil port and a second working oil port of the first reversing valve 13 are respectively connected with a sixth oil port A1 and a seventh oil port B1, the fourth oil port G is respectively connected with an oil inlet of the proportional overflow valve 1 and an oil outlet of the third reversing valve 2, an oil outlet of the proportional overflow valve 1 is connected with a second oil port T, an oil inlet of the third reversing valve 2 is respectively connected with an oil outlet of the fourth reversing valve 3 and an oil outlet of the fifth reversing valve 19, an oil inlet of the fourth reversing valve 3 is respectively connected with a seventh oil port B1 and a second oil port T, and an oil inlet of the fifth reversing valve 19 is respectively connected with a sixth oil port A1 and a second oil port T; the fifth oil port MA1 is externally connected with the first pressure sensor 24, and the fifth oil port MA1 is respectively connected with the sixth oil port A1, the oil inlet of the fifth reversing valve 19 and the first working oil port of the first reversing valve 13. Wherein the first reversing valve 13 is a three-position four-way reversing valve; the second reversing valve 8, the third reversing valve 2, the fourth reversing valve 3 and the fifth reversing valve 19 are all two-position two-way electromagnetic reversing valves.
In the working process, the working states of the overflow valve 1, the first reversing valve 13, the second reversing valve 8, the third reversing valve 2, the fourth reversing valve 3 and the fifth reversing valve 19 are respectively controlled, so that the hydraulic pump can be controlled to supply oil into the valve group and output the oil to the hydraulic cylinder 20 and the impact equipment 23, the hydraulic cylinder 20 is controlled to perform rock drilling feeding operation, and synchronous operation of rock drilling feeding, rotation, impact, water supply and lubrication can be realized; the oil pressure in the rodless cavity of the hydraulic oil cylinder 20 is monitored in real time through the first pressure sensor 24 in the operation process, and the oil supply amount and the oil return amount are controlled, so that the automatic control of feeding and returning of the drilling is realized; the invention can solve the defects of high difficulty and high intensity of composite control in the rock drilling construction process, effectively reduces the labor intensity of operators and improves the construction efficiency.
In an alternative embodiment of the invention, as shown in fig. 1 and 2, the automatic rock drilling control valve group further comprises a sixth reversing valve 6, wherein an oil inlet of the sixth reversing valve 6 is connected with an oil outlet of the second reversing valve 8, and an oil outlet of the sixth reversing valve 6 is connected with the second oil port T. The sixth reversing valve 6 is a two-position two-way electromagnetic reversing valve, and the sixth reversing valve 6 can control the oil return of the eighth oil port A2 and return the oil return to the hydraulic oil tank connected with the second oil port T.
In an alternative embodiment of the present invention, as shown in fig. 1 and 2, the automatic rock drilling control valve set further includes a first pressure reducing valve 9 disposed between the first oil port P and the second reversing valve 8, an oil inlet of the first pressure reducing valve 9 is connected to the first oil port P, and an oil outlet of the first pressure reducing valve 9 is connected to an oil inlet of the second reversing valve 8. The oil pressure delivered to the eighth oil port A2 is regulated by the first relief valve 9 to ensure the normal operation of the percussion device 23.
Further, as shown in fig. 1 and 2, the automatic rock drilling control valve set further comprises a first damping 7, a first overflow valve 10 and a first one-way valve 11, wherein an oil port of the first damping 7 is connected with an oil outlet of the second reversing valve 8, an external control port of the first pressure reducing valve 9 is respectively connected with another oil port of the first damping 7, an oil inlet of the sixth reversing valve 6, an oil inlet of the first overflow valve 10 and an inlet of the first one-way valve 11, an oil outlet of the first overflow valve 10 is connected with the second oil port T, and an outlet of the first one-way valve 11 is connected with the third oil port LS; a second overflow valve 12 is arranged between the second oil port T and the sixth reversing valve 6, an oil inlet of the second overflow valve 12 is connected with an oil outlet of the sixth reversing valve 6, and an oil outlet of the second overflow valve 12 is connected with the second oil port T. After the oil pressure delivered to the eighth oil port A2 is regulated by the first relief valve 9, if there is surplus hydraulic oil, the hydraulic oil can flow back to the third oil port LS through the first check valve 11; if there is a backflow of oil or an excessive amount of hydraulic oil in the eighth port A2, the oil may be returned to the hydraulic tank connected to the second port T through the sixth directional valve 6 or the first relief valve 10.
In an alternative embodiment of the present invention, as shown in fig. 1 and 2, the automatic rock drilling control valve set further includes a third overflow valve 4, an oil inlet of the third overflow valve 4 is connected to the seventh oil port B1, an oil outlet of the fourth reversing valve 3, and a second working oil port of the first reversing valve 13, respectively, and an oil outlet of the third overflow valve 4 is connected to the second oil port T. The third relief valve 4 can control the return of the seventh oil port B1 and return the return oil to the hydraulic oil tank connected to the second oil port T.
In an alternative embodiment of the present invention, as shown in fig. 1 and 2, the automatic rock drilling control valve set further includes a fourth overflow valve 5, wherein an oil inlet of the fourth overflow valve 5 is connected to the sixth oil port A1, an oil outlet of the fifth reversing valve 19 and the first working oil port of the first reversing valve 13, and an oil outlet of the fourth overflow valve 5 is connected to the second oil port T. The fourth overflow valve 5 can control the oil return of the sixth oil port A1 and return the oil return to the hydraulic oil tank connected with the second oil port T.
In an alternative embodiment of the present invention, as shown in fig. 1 and 2, the automatic rock drilling control valve set further includes a second damping 17, a third damping 18 and a second one-way valve 16, where an oil port of the second damping 17 is connected to an oil outlet of the fourth reversing valve 3, and another oil port of the second damping 17 is connected to an oil inlet of the third reversing valve 2 and an inlet of the second one-way valve 16, respectively, and oil in a rod cavity of the hydraulic cylinder 20 may flow back to the hydraulic pump sequentially through a seventh oil port B1, the fourth reversing valve 3, the third damping 18, the second one-way valve 16 and the third oil port LS; one oil port of the third damping 18 is connected with an oil outlet of the fifth reversing valve 19, the other oil port of the third damping 18 is respectively connected with an oil inlet of the third reversing valve 2 and an inlet of the second one-way valve 16, an outlet of the second one-way valve 16 is connected with the third oil port LS, and oil in a rodless cavity of the hydraulic cylinder 20 can flow back to the hydraulic pump through the sixth oil port A1, the fifth reversing valve 19, the second damping 17, the second one-way valve 16 and the third oil port LS in sequence.
Further, as shown in fig. 1 and 2, the automatic rock drilling control valve set further includes a second relief valve 14 and a fifth relief valve 15, an oil inlet of the second relief valve 14 is connected with the first oil port P, an oil outlet of the second relief valve 14 is connected with an oil inlet of the first reversing valve 13, an external control port of the second relief valve 14 is respectively connected with an oil inlet of the fifth relief valve 15, an inlet of the second one-way valve 16 and an oil inlet of the third reversing valve 2, and an oil outlet of the fifth relief valve 15 is connected with the second oil port T. The oil pressure input into the first reversing valve 13 is regulated through the second pressure reducing valve 14, so that the normal operation of the first reversing valve 13 is ensured; when the hydraulic oil is excessive, part of the hydraulic oil can be returned to the hydraulic oil tank connected with the second oil port T through the fifth overflow valve 15.
The automatic control valve group for drilling has the characteristics and advantages that:
The automatic control valve bank for rock drilling can control the working state of each reversing valve in the automatic control valve bank for rock drilling, so that oil can be supplied to the valve bank through a hydraulic pump and output to the hydraulic cylinder 20 and the impact equipment 23, the hydraulic cylinder 20 is controlled to perform rock drilling feeding operation, and synchronous operation of rock drilling feeding, rotation, impact, water supply and lubrication can be realized; the internal pressure of the hydraulic cylinder 20 can be monitored in real time in the operation process, and the oil supply amount and the oil return amount are controlled, so that the automatic control of feeding and returning of drilling is realized, the potential risk of drill rod blocking can be automatically identified, the drill rod blocking prevention control is automatically carried out, the occurrence of drill rod blocking is effectively avoided, the construction efficiency is improved, and the service life of equipment is prolonged; the invention can solve the defects of high difficulty and high intensity of composite control in the rock drilling construction process, effectively reduces the labor intensity of operators and improves the construction efficiency.
Second embodiment
As shown in fig. 1 to 3, the present invention provides a control system including a hydraulic pump, a hydraulic tank, a hydraulic cylinder 20, an impact device 23, and the above-mentioned automatic rock drilling control valve block, the hydraulic pump is connected to a first port P and a third port LS of the automatic rock drilling control valve block, the hydraulic tank is connected to a second port T of the automatic rock drilling control valve block, the impact device 23 is connected to an eighth port A2 of the automatic rock drilling control valve block, a sixth port A1 of the automatic rock drilling control valve block is connected to a rodless chamber of the hydraulic cylinder 20, a seventh port B1 of the automatic rock drilling control valve block is connected to a rod-shaped chamber of the hydraulic cylinder 20, a fifth port MA1 of the automatic rock drilling control valve block is connected to a first pressure sensor 24, and the first pressure sensor 24 is connected to a rodless chamber of the hydraulic cylinder 20.
In an alternative embodiment of the invention, the control system further comprises a front stroke limiter (not shown) arranged in front of the rock drilling equipment (such as a rock drill) and a rear stroke limiter (not shown) arranged behind the rock drilling equipment, wherein the front of the rock drilling equipment is preset with a rock drilling limit point, the rear of the rock drilling equipment is preset with a back support limit point, the front stroke limiter is arranged on the rock drilling limit point, and the rear stroke limiter is arranged on the back support limit point. The rock drilling equipment can trigger the front stroke limiting device and the rear stroke limiting device respectively in the rock drilling and back supporting processes, so that the rock drilling equipment can be controlled to stop moving in time after contacting the stroke limiting device, the risk of drill rod clamping is effectively avoided, the construction efficiency is improved, and the service life of the equipment is prolonged.
Further, the front stroke limiting device and the rear stroke limiting device can be, but are not limited to, stroke limiting switches, detection signal output ends of the stroke limiting switches are respectively connected with detection signal receiving ends of a controller, and control signal output ends of the controller are connected with control ends of the automatic rock drilling control valve group, so that on-off states of reversing valves in the automatic rock drilling control valve group can be controlled through the controller.
In an alternative embodiment of the invention, as shown in fig. 2, the impact device 23 is connected to a water delivery pipe, on which an electromagnetic ball valve 21 is arranged, and to an oil mist inlet pipe, on which a seventh reversing valve 22 is arranged. The seventh reversing valve 22 is a two-position two-way solenoid valve. By controlling the on-off state of the electromagnetic ball valve 21 and the seventh reversing valve 22, water supply, slag discharge and lubrication can be performed simultaneously.
In an alternative embodiment of the present invention, as shown in fig. 2, the control system further includes a swing motor 26, the power supply end of the swing motor 26 is provided with a second pressure sensor 25, and the swing motor 26 is connected with a multi-way valve 27, and the multi-way valve 27 is connected to the control system, so as to control the forward rotation and the reverse rotation of the swing motor 26.
The control method of the control system of the invention is as follows: when the rock drilling equipment performs rock drilling feeding operation, the left electromagnet of the first reversing valve 13 (namely a three-position four-way reversing valve) is controlled to be electrified, the fifth reversing valve 19 is electrified and conducted, the second reversing valve 8 is electrified and conducted, meanwhile, the rotary motor 26 is controlled to rotate positively, the electromagnetic ball valve 21 is electrified and conducted, the seventh reversing valve 22 is electrified and conducted, the first oil port P and the third oil port LS are respectively connected with a hydraulic pump, the second oil port T is connected with a hydraulic oil tank, the left position of the first reversing valve 13 (namely the three-position four-way reversing valve) is operated, and hydraulic oil sequentially passes through the first oil port P, the second pressure reducing valve 14, the first reversing valve 13 and the sixth oil port A1 and then enters a rodless cavity of the hydraulic oil cylinder 20; hydraulic oil with a rod cavity of the hydraulic oil cylinder 20 sequentially passes through a seventh oil port B1, a first reversing valve 13 (namely a three-position four-way reversing valve) and a second oil port T and then enters the hydraulic oil tank, and a piston rod of the hydraulic oil cylinder 20 extends outwards to push rock drilling equipment to advance, so that rock drilling feeding operation is realized; meanwhile, hydraulic oil also sequentially enters the impact equipment 23 through the first oil port P, the first pressure reducing valve 9, the second reversing valve 8 and the eighth oil port A2 to perform impact operation, and at the moment, synchronous operation of feeding, rotation, impact, water supply, lubrication and the like of the rock drilling equipment can be realized. Because the first pressure sensor 24 is connected to the fifth oil port MA1, and the first pressure sensor 24 is connected to the rodless cavity of the hydraulic cylinder 20, when the feeding pressure (i.e., the oil pressure in the rodless cavity of the hydraulic cylinder 20) exceeds a set threshold, the third reversing valve 2 is controlled to be electrified and conducted, the proportional overflow valve 1 is electrified and conducted, and the excessive oil flows back to the hydraulic oil tank through the second oil port T, so that the oil pressure in the rodless cavity of the hydraulic cylinder 20 is regulated to a preset pressure; because the second pressure sensor 25 is arranged at the forward rotation oil port of the rotary motor 26, when the second pressure sensor 25 detects that the oil pressure is suddenly increased or reaches a set threshold value, the left electromagnet of the first reversing valve 13 (namely the three-position four-way reversing valve) is controlled to lose electricity, when the pressure signal detected by the second pressure sensor 25 is recovered to be normal, the first reversing valve 13 (namely the three-position four-way reversing valve) is controlled to recover the left electromagnet to be in an electricity obtaining state, after the front stroke limiting device is triggered in the feeding process of the rock drilling equipment, the left electromagnet of the first reversing valve 13 (namely the three-position four-way reversing valve) is controlled to lose electricity, the right electromagnet of the first reversing valve 13 (namely the three-position four-way reversing valve) is controlled to be in electricity obtaining, meanwhile, the fifth reversing valve 19 is controlled to be powered off, the fourth reversing valve 3 is controlled to be electrically conducted, hydraulic oil sequentially passes through the first oil port P, the second pressure reducing valve 14, the first reversing valve 13 and the seventh oil port B1 and then enters a rod cavity of the hydraulic oil cylinder 20, hydraulic oil in a rodless cavity of the hydraulic oil cylinder 20 sequentially passes through the sixth oil port A1, the first reversing valve 13 (namely a three-position four-way reversing valve) and the second oil port T and then flows back into the hydraulic oil tank, and a piston rod of the hydraulic oil cylinder 20 is retracted, so that the rock drilling and support returning process is realized; meanwhile, the electromagnetic ball valve 21 can be controlled to be powered off, and when the return support is triggered to the rear stroke limiting device, the electromagnet of the first reversing valve 13 (namely the three-position four-way reversing valve) is controlled to be powered off, the fourth reversing valve 3 is powered off, the second reversing valve 8 is powered off, and the seventh reversing valve 22 is powered off. The rock drilling rig starts to adjust the next hole site and then repeats the above procedure to enter the next working cycle.
The control system of the invention has the characteristics and advantages that:
1. The control system adopts an electromechanical-hydraulic coupling mode to realize intelligent control of the rock drilling equipment, achieves the purpose of automatic rock drilling construction, effectively reduces the labor intensity of operators and improves the construction efficiency.
2. The control system is convenient to operate, can automatically control the work of cooperative feeding, rotation, deslagging, lubrication and the like of the rock drilling equipment, does not need manual intervention, can automatically close water supply and return to the back support limit point after rock drilling is pushed to the rock drilling limit point, and then automatically stops acting; entering the next working cycle after finishing posture adjustment, automatically avoiding the risk of drill rod clamping in the whole process, and remarkably improving the construction efficiency.
3. In the control system, the rock drilling automatic control valve group meets the IP67 protection grade, can meet the temperature environment of-40 ℃ to 46 ℃ as a whole, has the advantages of strong applicability, high reliability, strong pollution resistance and the like, and can be used in deep water or muddy water environments for a long time.
4. The control system can complete tapping by controlling the piston rod of the hydraulic oil cylinder 20, has the function of tapping automatic control, and can effectively improve tapping quality and efficiency.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (11)
1. The utility model provides a rock drilling automatic control valves, its characterized in that is provided with the first hydraulic fluid port of external hydraulic pump, the second hydraulic fluid port of external hydraulic tank, the third hydraulic fluid port of external hydraulic pump, the sixth hydraulic fluid port of external hydraulic cylinder rodless chamber, external hydraulic cylinder has the seventh hydraulic fluid port in pole chamber, to the hydraulic pressure ratio of pole chamber and rodless intracavity in the hydraulic cylinder carries out the fourth hydraulic fluid port of regulation, detects hydraulic pressure in the hydraulic cylinder rodless chamber's fifth hydraulic fluid port and the eighth hydraulic fluid port of external impact device, wherein:
The automatic rock drilling control valve group comprises a proportional overflow valve, a first reversing valve, a second reversing valve, a third reversing valve, a fourth reversing valve and a fifth reversing valve, wherein the first oil port is respectively connected with an oil inlet of the first reversing valve and an oil inlet of the second reversing valve, an oil outlet of the second reversing valve is connected with the eighth oil port, an oil return port of the first reversing valve is connected with the second oil port, a first working oil port and a second working oil port of the first reversing valve are respectively connected with the sixth oil port and the seventh oil port, the fourth oil port is respectively connected with an oil inlet of the proportional overflow valve and an oil outlet of the third reversing valve, an oil outlet of the proportional overflow valve is connected with the second oil port, an oil inlet of the third reversing valve is respectively connected with an oil outlet of the fourth reversing valve and an oil outlet of the fifth reversing valve, an oil inlet of the fourth reversing valve is respectively connected with the seventh oil port and the second oil port, and an oil inlet of the fifth reversing valve are respectively connected with the sixth oil port and the sixth oil port; the fifth oil port is externally connected with a first pressure sensor, and is respectively connected with the sixth oil port, an oil inlet of the fifth reversing valve and a first working oil port of the first reversing valve;
The automatic rock drilling control valve group further comprises a sixth reversing valve, an oil inlet of the sixth reversing valve is connected with an oil outlet of the second reversing valve, and an oil outlet of the sixth reversing valve is connected with the second oil port;
The automatic rock drilling control valve group further comprises a first pressure reducing valve arranged between the first oil port and the second reversing valve, an oil inlet of the first pressure reducing valve is connected with the first oil port, and an oil outlet of the first pressure reducing valve is connected with an oil inlet of the second reversing valve;
the automatic rock drilling control valve group further comprises a first damping, a first overflow valve and a first one-way valve, an oil port of the first damping is connected with an oil outlet of the second reversing valve, an outer control port of the first pressure reducing valve is respectively connected with another oil port of the first damping, an oil inlet of the sixth reversing valve, an oil inlet of the first overflow valve and an inlet of the first one-way valve, an oil outlet of the first overflow valve is connected with the second oil port, and an outlet of the first one-way valve is connected with the third oil port.
2. The automatic rock drilling control valve set of claim 1, wherein the first reversing valve is a three-position four-way reversing valve; the second reversing valve, the third reversing valve, the fourth reversing valve, the fifth reversing valve and the sixth reversing valve are all two-position two-way electromagnetic reversing valves.
3. The automatic rock drilling control valve set according to claim 1, further comprising a second overflow valve disposed between the second oil port and the sixth reversing valve, an oil inlet of the second overflow valve being connected to an oil outlet of the sixth reversing valve, and an oil outlet of the second overflow valve being connected to the second oil port.
4. The automatic rock drilling control valve set according to claim 1, further comprising a third overflow valve and a fourth overflow valve, wherein an oil inlet of the third overflow valve is connected with the seventh oil port, an oil outlet of the fourth reversing valve and a second working oil port of the first reversing valve, respectively, and an oil outlet of the third overflow valve is connected with the second oil port; the oil inlet of the fourth overflow valve is respectively connected with the sixth oil port, the oil outlet of the fifth reversing valve and the first working oil port of the first reversing valve, and the oil outlet of the fourth overflow valve is connected with the second oil port.
5. The automatic rock drilling control valve set according to claim 1, further comprising a second damper, a third damper and a second one-way valve, wherein an oil port of the second damper is connected with an oil outlet of the fourth reversing valve, and the other oil port of the second damper is connected with an oil inlet of the third reversing valve and an inlet of the second one-way valve, respectively; an oil port of the third damper is connected with an oil outlet of the fifth reversing valve, the other oil port of the third damper is connected with an oil inlet of the third reversing valve and an inlet of the second one-way valve respectively, and an outlet of the second one-way valve is connected with the third oil port.
6. The automatic rock drilling control valve set according to claim 5, further comprising a second pressure reducing valve and a fifth relief valve, wherein an oil inlet of the second pressure reducing valve is connected with the first oil port, an oil outlet of the second pressure reducing valve is connected with an oil inlet of the first reversing valve, an outer control port of the second pressure reducing valve is respectively connected with an oil inlet of the fifth relief valve, an inlet of the second one-way valve and an oil inlet of the third reversing valve, and an oil outlet of the fifth relief valve is connected with the second oil port.
7. A control system, characterized in that the control system comprises a hydraulic pump, a hydraulic oil tank, a hydraulic cylinder, an impact device and the automatic rock drilling control valve set according to any one of claims 1 to 6, wherein the hydraulic pump is respectively connected with a first oil port and a third oil port of the automatic rock drilling control valve set, the hydraulic oil tank is connected with a second oil port of the automatic rock drilling control valve set, the impact device is connected with an eighth oil port of the automatic rock drilling control valve set, a sixth oil port and a seventh oil port of the automatic rock drilling control valve set are respectively connected with a rodless cavity of the hydraulic cylinder and a rod-containing cavity of the hydraulic cylinder, a fifth oil port of the automatic rock drilling control valve set is connected with a first pressure sensor, and the first pressure sensor is connected with the rodless cavity of the hydraulic cylinder.
8. The control system of claim 7, further comprising a front travel limiter disposed in front of the rock drilling apparatus and a rear travel limiter disposed behind the rock drilling apparatus, the front and rear of the rock drilling apparatus being pre-provided with a rock drilling limit point and a return support limit point, respectively, the front travel limiter being mounted on the rock drilling limit point and the rear travel limiter being mounted on the return support limit point.
9. The control system of claim 7, wherein the impact device is connected to a water delivery line and an oil mist input line, and wherein the water delivery line and the oil mist input line are respectively provided with an electromagnetic ball valve and a seventh reversing valve.
10. The control system of claim 9, wherein the seventh reversing valve is a two-position two-way solenoid valve.
11. The control system of claim 9, further comprising a swing motor, wherein a second pressure sensor is disposed at a forward swing port of the swing motor, and wherein the swing motor is coupled to the control system via a multiple-way valve.
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| CN202111534925.0A CN114321060B (en) | 2021-12-15 | 2021-12-15 | Automatic control valve group and control system for rock drilling |
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| CN202111534925.0A CN114321060B (en) | 2021-12-15 | 2021-12-15 | Automatic control valve group and control system for rock drilling |
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| CN114321060B true CN114321060B (en) | 2024-05-24 |
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| CN201560706U (en) * | 2009-12-23 | 2010-08-25 | 三一重型装备有限公司 | Hydraulic control circuit for rock drill and control system thereof |
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|---|---|
| CN114321060A (en) | 2022-04-12 |
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