CN205618148U - Down -hole drill impels pressure hydraulic control return circuit - Google Patents
Down -hole drill impels pressure hydraulic control return circuit Download PDFInfo
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- CN205618148U CN205618148U CN201620248747.3U CN201620248747U CN205618148U CN 205618148 U CN205618148 U CN 205618148U CN 201620248747 U CN201620248747 U CN 201620248747U CN 205618148 U CN205618148 U CN 205618148U
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Abstract
The utility model provides a down -hole drill impels pressure hydraulic control return circuit, includes that oil tank, multiple directional control valve, drilling rod propulsion motor, drilling rod gyration motor, flow control valve organize and the feedback variable pump package, it is continuous with the P mouth of pilot operated directional control valve that mouthful pr is far controlled to feedback variable pump package pressure, the F mouth of pilot operated directional control valve links to each other with the push -down a mouth that impels guide's handle, the A mouth of pilot operated directional control valve links to each other with the P1 mouth of balanced valve and high pressure overflow valve, the R mouth of balanced valve passes through oil pipe and links to each other with drilling rod gyration motor corotation oil circuit, the P2 mouth of balanced valve links to each other with the low pressure overflow valve, the utility model discloses a drilling rod axle load matches the rock stratum all the time among the drilling process, has stabilized the rod rotation speed, has improved drilling efficiency.
Description
Art
The utility model relates to a kind of down-the-hole drill propelling pressure hydraulic control circuit, belongs to mine drilling equipment technical field.
Background technology
Down-the-hole drill, because of advantages such as its operation aperture are big, boring is deep, is widely used in the open-air work such as mining, road construction
Blast hole Drilling field.Mainly utilize drilling tool to rotate during this equipment construction, impact carrys out fractured rock, and therefore drilling rod advances and bores
Bar revolution is the important execution action in boring procedure, and parameter matching degree and the rock stratum adaptability of propelling pressure between the two are straight
Connect and determine complete machine service behaviour.
In boring procedure, owing to the change of formation geology condition is unpredictable, the rock drill bit for different hardness needs different axles
Pressure, if rock stratum hardness is softer, propulsive force is excessive, then drilling rod steering resistance moment of torsion increases, and revolution rotating speed reduction directly results in
Penetration rate declines, and aggravates the loss of drilling tool simultaneously, if steering resistance moment of torsion continues to increase, even there will be kelly phenomenon,
If rock stratum hardness is relatively big, propulsive force is too small, then drill bit can not be close to rock, impacts energy and can not act on rock completely,
Even there will be drill slipping phenomenon, it follows that propulsive force size directly affects drilling efficiency.
Original down-the-hole drill uses drilling rod revolution, advances independently control loop, in boring procedure, drilling rod propelling pressure base
Pressure-reducing valve control mode or oil pump constant pressure control system is used in basis.Above two Solid rocket engine mode becomes at formation geology
During change, the propelling pressure of drilling rod and drilling rod rotation oil can not be adjusted independent of advancing oil circuit in good time, cause drilling rod rotation pressure
Fluctuation is relatively big, and then causes the instability turning round rotating speed.
Therefore, it is badly in need of how a kind of new hydraulic control circuit of exploitation mates rock stratum with drilling rod axial compression during solving bore operation,
And the problem stablizing drilling rod revolution rotating speed.
Utility model content
The technical problems to be solved in the utility model is to provide drilling rod axial compression in a kind of boring procedure can with the change of nature of ground not
Disconnected adjustment, revolution rotating speed is more stable, drilling efficiency higher down-the-hole drill hydraulic control circuit.
For solving problem above, the technical solution adopted in the utility model is: include that fuel tank, multiple directional control valve, drilling rod advance horse
Reach, drilling rod rotary motor, flow control valve group and feedback variable pump group, described feedback variable pump group pressure far controls mouthful Pr and hydraulic control
The P mouth of reversal valve is connected, and the F mouth of described pilot operated directional control valve pushes away a mouth under pilot handle be connected with advancing, described pilot operated directional control valve
A mouth is connected with P1 mouth and the high-pressure overflow valve of balanced valve, and the R mouth of described balanced valve rotates forward oil circuit by oil pipe with drilling rod rotary motor
Being connected, the P2 mouth of described balanced valve is connected with low pressure relief valve.
Described balanced valve pilot control is than for 1:1 so that when the spool of described balanced valve moves, drilling rod rotation pressure and propelling pressure
Sum is consistently equal to the setting of balanced valve spring.
Use the drilling rod propelling pressure control loop of technique scheme, drilling rod is rotated forward pressure and is directly acted on by feeding back oil pipe
The R mouth of balanced valve, in boring procedure, when drilling rod rotation pressure is less than balanced valve setting value with propelling pressure sum, advances pressure
Power is far controlled, by with feedback variable pump pressure, the high-pressure overflow valve decision that mouthful Pr is connected, when nature of ground changes, and drilling rod revolution pressure
Power is gradually increasing, and it is with propelling pressure sum more than after balanced valve setting value, and balanced valve valve core opening degree is gradually increased, balanced valve
P1 mouth fluid communicate with low pressure relief valve through throttling spool, drilling rod propelling pressure by high-pressure overflow valve setting value to low pressure relief valve
Setting value seamlessly transits, and when the drilling rod rotation pressure of embodiment nature of ground often increases certain value in the process, propelling pressure is with regard to phase
The minimizing certain value (negative correlation) answered, the reduction of drilling rod propelling pressure turn avoid rotation pressure in turn and raises further, as
This adjusts repeatedly, and drilling rod propelling pressure and rotation pressure may eventually reach a new relative equilibrium.
In sum, the utility model is a kind of drilling rod axial compression real-time matching rock stratum, and rod rotation speed is more stable, and drilling efficiency is more
High down-the-hole drill hydraulic control circuit.
Brief description
Fig. 1 is hydraulic control circuit schematic diagram of the present utility model.
In accompanying drawing, the 1st, fuel tank, the 2nd, low pressure relief valve, the 3rd, balanced valve, the 4th, pilot operated directional control valve, the 5th, high-pressure overflow valve, the 6th,
Oil pipe, the 7th, advances pilot handle, the 8th, multiple directional control valve, the 9th, drilling rod propulsion motor, the 10th, drilling rod rotary motor, the 11st, flows
Control valve group, the 12nd, feedback variable pump group.
Detailed description of the invention
With specific embodiment, structure of the present utility model and operating principle are described further below in conjunction with the accompanying drawings.
With reference to Fig. 1, the 8th, drilling rod propulsion motor the 9th, drilling rod rotary motor the 10th, the flow control of the fuel tank of this device the 1st, banked direction control valves reversal valve
Valve group 11 processed and feedback variable pump group 12 connect according to technological requirement, and described feedback variable pump group 12 pressure is far controlled mouthful Pr and changed with hydraulic control
Being connected to the P mouth of valve 4, the F mouth of pilot operated directional control valve 4 pushes away a mouth under pilot handle 7 be connected with advancing, while A mouth and high pressure kicks
Valve 5 is connected with the P1 mouth of balanced valve 3, and the R mouth of described balanced valve 3 rotates forward oil circuit by oil pipe 6 with drilling rod rotary motor 10 and is connected,
P2 mouth is connected with low pressure relief valve 2.
During boring, drilling rod rotary motor 10 rotates forward, and advances a mouth output control oil of pilot handle 7, control and multiple directional control valve 8
The drilling rod propulsion motor 9 that A1, B1 mouth is connected performs lower promotion and makees, and controls pilot operated directional control valve 4 left position access loop simultaneously, and feedback becomes
Amount pump group 12 pressure is far controlled mouthful Pr and is communicated with the P1 mouth of high-pressure overflow valve 5 and balanced valve 3, when the drilling rod being connected with the R mouth of balanced valve 3
When rotary motor rotates forward the setting value that pressure is less than balanced valve 3 (pilot control is than 1:1) with high-pressure overflow valve 5 setting value sum, high
Pressurized overflow valve 5 is opened, and now drilling rod propelling pressure is determined by high-pressure overflow valve 5 setting value, when drilling rod rotation pressure is gradually increasing,
It is with high-pressure overflow valve 5 setting value sum more than after balanced valve 3 setting value, and balanced valve 3 is gradually opened, and its P1 mouth fluid saves through spool
Stream, P2 mouth flow to low pressure relief valve 2, and low pressure relief valve 2 is opened, and high-pressure overflow valve 5 is closed, and now drilling rod propelling pressure is equal to low
The setting value of pressurized overflow valve 2 and balanced valve 3 valve port crushing △ P sum, and balanced valve 3 valve port crushing △ P is with the increase of spool displacement
And reduce, and then achieving drilling rod rotation pressure when often increasing certain value, propelling pressure is just corresponding reduces certain value (negative correlation
Property), the reduction of drilling rod propelling pressure turn avoid rotation pressure in turn and raises further, so repeatedly adjusts, and drilling rod advances pressure
Power and rotation pressure may eventually reach a new relative equilibrium, finally realize drilling rod axial compression coupling rock stratum, stablize drilling rod revolution
Rotating speed functions.
On down-the-hole drill, feedback variable pump group 12 pressure far controls mouthful Pr not by advancing the pilot operated directional control valve 4 of pilot handle 7 control
And all control devices being connected with high-pressure overflow valve 5 broadly fall in the protection domain of this patent.
Claims (2)
1. a down-the-hole drill propelling pressure hydraulic control circuit, including fuel tank (1), multiple directional control valve (8), drilling rod advance horse
Reach (9), drilling rod rotary motor (10), flow control valve group (11) and feedback variable pump group (12), it is characterised in that: institute
State feedback variable pump group (12) pressure far to control mouthful Pr and be connected with the P mouth of pilot operated directional control valve (4), described pilot operated directional control valve (4)
F mouth pushes away a mouth under pilot handle (7) be connected with advancing, the P1 mouth of the A mouth of described pilot operated directional control valve (4) and balanced valve (3)
Being connected with high-pressure overflow valve (5), the R mouth of described balanced valve (3) is rotated forward with drilling rod rotary motor (10) by oil pipe (6)
Oil circuit is connected, and the P2 mouth of described balanced valve (3) is connected with low pressure relief valve (2).
2. a kind of down-the-hole drill propelling pressure hydraulic control circuit according to claim 1, it is characterised in that: described flat
Weighing apparatus valve (3) pilot control ratio is for 1:1 so that when the spool of described balanced valve (3) moves, drilling rod rotation pressure and propelling pressure
Sum is consistently equal to the setting of balanced valve (3) spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620248747.3U CN205618148U (en) | 2016-03-29 | 2016-03-29 | Down -hole drill impels pressure hydraulic control return circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620248747.3U CN205618148U (en) | 2016-03-29 | 2016-03-29 | Down -hole drill impels pressure hydraulic control return circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205618148U true CN205618148U (en) | 2016-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620248747.3U Active CN205618148U (en) | 2016-03-29 | 2016-03-29 | Down -hole drill impels pressure hydraulic control return circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296111A (en) * | 2019-06-28 | 2019-10-01 | 北京三一智造科技有限公司 | A kind of hydraulic motor system, rotary drilling rig and application method |
-
2016
- 2016-03-29 CN CN201620248747.3U patent/CN205618148U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296111A (en) * | 2019-06-28 | 2019-10-01 | 北京三一智造科技有限公司 | A kind of hydraulic motor system, rotary drilling rig and application method |
| CN110296111B (en) * | 2019-06-28 | 2021-05-25 | 北京三一智造科技有限公司 | Hydraulic motor system, rotary drilling rig and using method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |