CN216895110U - Hydraulic control system of rock drill - Google Patents
Hydraulic control system of rock drill Download PDFInfo
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- CN216895110U CN216895110U CN202220371070.8U CN202220371070U CN216895110U CN 216895110 U CN216895110 U CN 216895110U CN 202220371070 U CN202220371070 U CN 202220371070U CN 216895110 U CN216895110 U CN 216895110U
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Abstract
The utility model discloses a hydraulic control system of a rock drill, which comprises a hydraulic oil tank, a motor, a hydraulic pump, an impact pressure regulating stop valve, a rock drill, a multi-way valve, a one-way valve, a hydraulic control reversing valve, an overflow valve, an electromagnetic reversing valve and a shuttle valve. The hydraulic pump is a load sensitive pump, the hydraulic pump is connected with a rock drill oil path through an impact pressure regulating stop valve, the multi-way valve is respectively connected with a hydraulic control reversing valve and an electromagnetic reversing valve, the electromagnetic reversing valve and a rodless cavity of the propulsion oil cylinder are respectively connected with a shuttle valve, and an A port of the hydraulic control reversing valve is connected with a P port of an overflow valve. The X port of the hydraulic pump is connected with the P port of the hydraulic control reversing valve. The hydraulic system can accurately control the high-low impact mode and various working conditions of the rock drill, improves the working stability of the rock drill and is convenient to maintain.
Description
Technical Field
The utility model relates to the technical field of rock drills, in particular to a hydraulic control system of the rock drill.
Background
Rock drill is a tool for directly exploiting stone. It drills blastholes in rock formations to deposit explosives to blast the rock to complete the extraction of rock material or other stone works. Furthermore, the rock drill may also be adapted as a breaker for breaking hard layers such as concrete. At present, a rock drilling control system is controlled by a hydraulic valve, low propulsion corresponds to low impact, high propulsion corresponds to high impact, a high-low impact pressure control valve is integrated in a rock drilling control valve, accurate control cannot be achieved for low impact and high impact pressure, fault points are multiple, and maintenance is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a hydraulic control system of a rock drill, which aims to realize the accurate control of high and low impact during the working of the rock drill and reduce fault points.
In order to achieve the aim, the hydraulic control system of the rock drill comprises a hydraulic oil tank, a motor, a hydraulic pump, an impact pressure regulating stop valve, the rock drill, a multi-way valve, a one-way valve, a hydraulic control reversing valve, an overflow valve, an electromagnetic reversing valve and a shuttle valve; the hydraulic pump is a constant pressure pump, the motor is connected with the hydraulic pump, the hydraulic pump is connected with the hydraulic oil tank, and the hydraulic pump is connected with the rock drilling machine oil path through the impact high-pressure stop valve; the multi-way valve is a three-position six-way reversing valve, wherein a channel 1 is connected with an outlet of the one-way valve, an inlet of the one-way valve is connected with a port P of the hydraulic control reversing valve, a channel 2 of the multi-way valve is connected with high-pressure oil, a channel 3 of the multi-way valve is connected with a propelling pressure control valve, and the propelling pressure control valve is connected with a rodless cavity oil way of a propelling oil cavity; 4, connecting high-pressure oil with a channel; the channel 5 is connected with a port P of the electromagnetic directional valve; the 6 channel is connected with the hydraulic oil tank; the port A of the electromagnetic directional valve is connected with the port 1 of the shuttle valve, the rodless cavity of the propulsion oil cylinder is connected with the port 2 of the shuttle valve, the port 3 of the shuttle valve is connected with the control oil port of the hydraulic control directional valve, and the port A of the hydraulic control directional valve is connected with the port P of the overflow valve; and an X port of the hydraulic pump is connected with a P port of the hydraulic control reversing valve.
Furthermore, an X port of the hydraulic pump is connected with an MB port of the impact pressure regulating stop valve, and a P port of the impact pressure regulating stop valve is connected with an oil path of the rock drilling machine.
Further, the electromagnetic reversing valve further comprises a throttle valve, and the throttle valve is connected with the electromagnetic reversing valve in an oil circuit.
The utility model has the beneficial effects that: the hydraulic control system is provided with the load sensitive pump, the hydraulic control reversing valve and the overflow valve, so that the rock drill adopts the hydraulic reversing valve and the overflow valve to carry out external control sensitive control in a low impact mode, and adopts pump constant pressure control in a high impact mode, and compared with the hydraulic control system in the prior art, the hydraulic control system can realize accurate control, reduces fault points and is convenient to maintain; the high impact mode is forced, the impact pressure is not influenced by the propelling force, and the high impact state can be always kept, so that the working efficiency is higher; the idle-beating preventing function can effectively distinguish idle-beating and normal rock drilling working conditions, and damage to a rock drill and a drilling tool during idle-beating can be reduced.
Drawings
FIG. 1 is a schematic diagram of the principal control of the present hydraulic control system;
in the figure, 1-hydraulic oil tank, 2-motor, 3-hydraulic pump, 4-impact pressure regulating stop valve, 5-rock drill, 6-multi-way valve, 7-one-way valve, 8-hydraulic control reversing valve, 9-overflow valve, 10-electromagnetic reversing valve, 11-throttle valve and 12-shuttle valve
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The rock drill is used for drilling and rock drilling, firstly performs drilling positioning and then performs rock drilling operation, wherein a low-propulsion low-impact mode is adopted during drilling, and a high-propulsion high-impact mode is adopted during rock drilling. The hydraulic control system of the rock drill shown in fig. 1 comprises a hydraulic oil tank 1, a motor 2, a hydraulic pump 3, an impact pressure regulating stop valve 4, a rock drill 5, a multi-way valve 6, a one-way valve 7, a hydraulic control reversing valve 8, an overflow valve 9, an electromagnetic reversing valve 10, a throttle valve 11 and a shuttle valve 12. The hydraulic pump 3 is a load sensitive pump, the motor 2 is connected with the hydraulic pump 3, the hydraulic oil tank 1 of the hydraulic pump 3 is connected, and the hydraulic pump 3 is connected with the oil circuit of the rock drill 5 through the impact pressure regulating stop valve 4. The multi-way valve 6 is a three-position six-way reversing valve, wherein a channel 1 is connected with an outlet of the one-way valve 7, an inlet of the one-way valve 7 is connected with a port P of the hydraulic control reversing valve 8, a channel 2 of the multi-way valve 6 is connected with high-pressure oil, a channel 3 is connected with a propelling pressure control valve, and the propelling pressure control valve is connected with a rodless cavity oil way of the propelling oil cavity. 4, connecting high-pressure oil with a channel; the channel 5 is connected with a port P of the electromagnetic directional valve 10; the 6 channels are connected with the hydraulic oil tank 1. The port A of the electromagnetic directional valve 10 is connected with the port 1 of the shuttle valve 12, the rodless cavity of the propulsion oil cylinder is connected with the port 2 of the shuttle valve 12, the port 3 of the shuttle valve 12 is connected with the control oil port of the hydraulic control directional valve 8, and the port A of the hydraulic control directional valve 8 is connected with the port P of the overflow valve 9; the X port of the hydraulic pump 3 is connected with the P port of the hydraulic control reversing valve 8. The throttle valve 11 is connected with the oil path of the electromagnetic directional valve 10. Specifically, an X port of the hydraulic pump 3 is connected with an MB port of the impact pressure-regulating stop valve 4, and a P port of the impact pressure-regulating stop valve 4 is connected with an oil way of the rock drill 5.
The working principle of the hydraulic system is as follows:
when the hydraulic rock drill starts to work, the motor 2 drives the hydraulic pump 3 to obtain hydraulic oil from the hydraulic oil tank 1, and the impact pressure reduction stop valve 4 is opened by the oil pressure to enter the rock drill 5. At this time, the handle of the multi-way valve 6 is operated, and the multi-way valve 6 works in the middle position and enters the hole opening mode. The 2 channels of the multi-way valve 6 flow to the 1 channel, and the hydraulic oil circuit is disconnected because the one-way valve 7 is arranged on the channel. Hydraulic oil flows into the propulsion pressure control valve from the channel 4 to the channel 3 of the multi-way valve 6, and the pressure flowing into the rodless cavity of the propulsion oil cylinder is low. The flow direction of the 6 channels of the multi-way valve 6 is disconnected with the 5 channels, no hydraulic oil passes through the 6 channels, no hydraulic oil exists in the 1 port of the shuttle valve 12, the 2 port of the shuttle valve 12 is connected with the pressure of the rodless cavity of the propulsion cylinder, therefore, the 2 port of the 3 port of the shuttle valve 12 outputs the 2 port pressure to the X port of the hydraulic control reversing valve 8, the pressure is smaller than the pressure set by the hydraulic control reversing valve 8, the hydraulic control reversing valve 8 is not reversed, at the moment, the hydraulic control reversing valve 8 works at the lower position of the normal position, the hydraulic oil coming out of the hydraulic pump 3 passes through the P port of the hydraulic control reversing valve 8, flows through the P-A channel, enters the overflow valve 9 from the A port, the pressure set by the overflow valve 9 is low stamping force, and at the moment, the output pressure of the pump is low pressure. The entire rock drill is now operating in a low thrust and low impact state.
And continuously operating the handle of the multi-way valve 6, and enabling the multi-way valve 6 to work at the lower position to enter a rock drilling mode.
Hydraulic oil flows from ｃA channel 2 of the multi-way valve 6 to ｃA channel 5 to enter ｃA port P of the electromagnetic directional valve 10, the electromagnetic directional valve 10 is not electrified, the channel P-A is not communicated, no hydraulic oil passes through the channel, meanwhile, ｃA channel 4 of the multi-way valve 6 is disconnected from ｃA channel 3 to ｃA channel 3, no hydraulic oil passes through the propelling pressure control valve, the pressure of the other channel of hydraulic oil flowing into ｃA rodless cavity of the propelling oil cylinder is high, the hydraulic oil from the port 2 of the shuttle valve 12 is high, the port 3 of the shuttle valve 12 outputs the pressure of the port 2 to ｃA port X of the hydraulic control directional valve 8, the pressure is greater than the pressure set by the hydraulic control directional valve 8, the hydraulic oil pushes the hydraulic directional valve 8 to change direction and works in an upper position, the port P and the port A are not communicated, the hydraulic oil from the hydraulic pump 3 passes through the port P of the hydraulic control directional valve 8, the impact pressure at the time is the cut-off pressure set by the system, namely, so that the rock drill works in high propulsion at the time, high impact mode.
When the rock drill works in a high-punch type, the drill is jammed, and a drill rod needs to be withdrawn, the rock drill 5 is withdrawn, the detected propelling pressure is back pressure, hydraulic oil from the port 2 of the shuttle valve 12 is low pressure, the hydraulic control reversing valve 8 works in the lower position under the action of spring force, the impact pressure of the rock drill 5 is the pressure set by the overflow valve 9 and is low punching pressure, and a good drill rod pulling effect cannot be achieved. At the moment, the electromagnetic directional valve 10 is supplied with power, high-pressure oil flowing from the channel 2 of the multi-way valve 6 to the channel 5 acts on the port 1 of the shuttle valve 12 through the electromagnetic directional valve 10, the port 3 of the shuttle valve 12 outputs the high-pressure oil with the port 1 to control the hydraulic directional control valve 8 to change directions, so that the P-A channels are different all the time, and the rock drill always works in ｃA high impact mode. When the electromagnetic directional valve 10 is not electrified, the hydraulic oil flows back to the hydraulic oil tank 1 through the throttle valve 11.
When the rock drilling machine 5 is in ｃA normal rock drilling working mode and meets ｃA cavity, the propelling force can be automatically reduced, namely the pressure of the port 2 of the shuttle valve 12 is low pressure (no forced high impact), the pressure of the port 3 of the shuttle valve 12 acting on the port X of the hydraulic control reversing valve 8 is low pressure, the hydraulic control reversing valve 8 works at the lower position under the action of spring force, ｃA P-A channel is opened, at the moment, the impact pressure of the rock drilling machine 5 can be automatically switched from high impact pressure to the set pressure of the overflow valve 9, namely low impact pressure, and the rock drilling machine and ｃA drilling tool can be well protected.
This hydraulic system is through setting up hydraulic pump 3, under high impact mode, can keep invariable pressure always, makes the rock drill more stable when the rock drilling is worked. This hydraulic system sets up and mutually supports through the part of hydraulically controlled directional control valve 8 and overflow valve 9 when low impact to and the cooperation of hydraulic pump 3, make hydraulic system adopt overflow valve 9 external control sensitive control when low impulse is impeld to the height, then adopt hydraulic pressure 3 pump cooperation hydraulically controlled directional control valve 8 and overflow valve 9 to provide invariable pressure when high impulse high impact, thereby carry out accurate control to high low impact and various operating modes, improve rock drill job stabilization nature and security, and the fault point reduces, easy maintenance.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes which can be made within the knowledge of those skilled in the art without departing from the gist of the present invention are within the scope of the claims of the present invention.
Claims (3)
1. A rock drill hydraulic control system which characterized in that: the hydraulic control system comprises a hydraulic oil tank (1), a motor (2), a hydraulic pump (3), an impact pressure regulating stop valve (4), a rock drill (5), a multi-way valve (6), a one-way valve (7), a hydraulic control reversing valve (8), an overflow valve (9), an electromagnetic reversing valve (10) and a shuttle valve (12); the hydraulic pump (3) is a load sensitive pump, the motor (2) is connected with the hydraulic pump (3), the hydraulic pump (3) is connected with the hydraulic oil tank (1), and the hydraulic pump (3) is connected with an oil way of the rock drill (5) through the impact pressure regulating stop valve (4); the multi-way valve (6) is a three-position six-way reversing valve, wherein a channel 1 is connected with an outlet of the one-way valve (7), an inlet of the one-way valve (7) is connected with a port P of the hydraulic control reversing valve (8), a channel 2 of the multi-way valve (6) is connected with high-pressure oil, a channel 3 of the multi-way valve is connected with a propelling pressure control valve, and the propelling pressure control valve is connected with a rodless cavity oil way of a propelling oil cavity; 4, connecting high-pressure oil with a channel; the channel 5 is connected with a port P of the electromagnetic directional valve (10); the 6 channel is connected with the hydraulic oil tank (1); an A port of the electromagnetic directional valve (10) is connected with a 1 port of the shuttle valve (12), a rodless cavity of a propulsion oil cylinder is connected with a 2 port of the shuttle valve (12), a 3 port of the shuttle valve (12) is connected with a control oil port of the hydraulic control directional valve (8), and an A port of the hydraulic control directional valve (8) is connected with a P port of the overflow valve (9); and an X port of the hydraulic pump (3) is connected with a P port of the hydraulic control reversing valve (8).
2. A rock drill hydraulic control system as claimed in claim 1, characterised in that: the X port of the hydraulic pump (3) is connected with the MB port of the impact pressure regulating stop valve (4), and the P port of the impact pressure regulating stop valve (4) is connected with the oil way of the rock drill (5).
3. A rock drill hydraulic control system as claimed in claim 1, characterised in that: the electromagnetic directional control valve further comprises a throttle valve (11), and the throttle valve (11) is connected with an oil path of the electromagnetic directional valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220371070.8U CN216895110U (en) | 2022-02-23 | 2022-02-23 | Hydraulic control system of rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220371070.8U CN216895110U (en) | 2022-02-23 | 2022-02-23 | Hydraulic control system of rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216895110U true CN216895110U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220371070.8U Active CN216895110U (en) | 2022-02-23 | 2022-02-23 | Hydraulic control system of rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216895110U (en) |
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2022
- 2022-02-23 CN CN202220371070.8U patent/CN216895110U/en active Active
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