CN101586459A - Deep well grouting pressure reduction system for underground pressure measurement and ground throttle control - Google Patents
Deep well grouting pressure reduction system for underground pressure measurement and ground throttle control Download PDFInfo
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- CN101586459A CN101586459A CNA2009100164157A CN200910016415A CN101586459A CN 101586459 A CN101586459 A CN 101586459A CN A2009100164157 A CNA2009100164157 A CN A2009100164157A CN 200910016415 A CN200910016415 A CN 200910016415A CN 101586459 A CN101586459 A CN 101586459A
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Abstract
The invention provides a deep well grouting pressure reduction system for underground pressure measurement and ground throttle control. The deep well grouting pressure reduction system comprises a grouting pressure acquisition unit, a pressure signal processing circuit, a control unit and an electric throttle valve, wherein the grouting pressure acquisition unit is connected to an underground part of a slurry supply pipeline and comprises two pressure acquisition devices connected in series, and each pressure acquisition device is provided with a pressure sensor; the pressure signal processing circuit is connected with the grouting pressure acquisition unit and the control unit; the control unit is connected with the pressure signal processing circuit and the electric throttle valve; and the electric throttle valve is arranged on a ground part of the slurry supply pipeline and comprises a common stop valve and a step motor, a valve rod of the common stop valve is connected with the step motor, and a driving circuit of the step motor is connected with the control unit. By adopting the deep well grouting pressure reduction proposal of underground pressure measurement and ground throttle control, the linear continuous control is realized, the reliability of the system is increased, and the control precision is high.
Description
Technical field
The present invention relates to a kind of deep-well slip casting depressurized system, belong to slip casting technical field under the coal mine.
Background technology
Slip casting is by ground supply, because mine is darker, near 1000 meters under the coal mine.Therefore have the problem of grouting pressure superelevation, do not consider losses such as pipeline and valve, arrival down-hole grouting pressure can reach 10MPa, and (pressure that needs under the real well is 1.5～2.5MPa).The superelevation grouting pressure does not only satisfy instructions for use, and the pressure of superelevation can damage grouting pipeline and valve.Have a strong impact on ordinary production.Normally adopt common reducing valve control grouting pressure at present,, can reduce system reliability greatly if filling system adopts common reducing valve.
Summary of the invention
The present invention is directed to the problem that slurry injection technique exists under the existing coal mine, the deep-well slip casting depressurized system of the aboveground throttling control of testing pressure down hole of a kind of control accuracy height, good reliability is provided.
The deep-well slip casting depressurized system of the aboveground throttling of testing pressure down hole of the present invention control is by the following technical solutions:
This deep-well slip casting depressurized system comprises grouting pressure collecting unit, pressure signal processing circuit, control module and electric throttle valve:
The grouting pressure collecting unit: the grouting pressure collecting unit is connected the down-hole part of slurry pipeline, is used to gather the pressure for the slurry point; The grouting pressure collecting unit comprises two pressure acquisition devices that are connected in series, all be provided with pressure sensor on each pressure acquisition device, by comparing the pressure that two pressure sensors are measured, judge the reliability and the accuracy of whole pressure measuring system, when two pressure sensors have identical pressure measuring value, just gather the pressure that this records;
Pressure signal processing circuit: be connected with control module with the grouting pressure collecting unit, be used for the processing pressure signal;
Control module: be connected with pressure signal processing circuit and electric throttle valve, according to the difference output control electric throttle valve rotation direction of down-hole grouting pressure of setting and actual grouting pressure and the control signal of opening amount; Control module can adopt single-chip microcomputer, also can adopt programmable logic controller (PLC).
Electric throttle valve is installed in the aboveground part of slurry pipeline, comprises common stop valve and stepper motor, and the valve rod of common stop valve is connected with stepper motor, and the drive circuit of stepper motor is connected with control module.
Described pressure acquisition device comprises short tube, dish-like pressure transmission barrier film, oil cylinder and pressure sensor, and oil cylinder is installed on the short tube, is full of liquid medium in it, and the lower end of oil cylinder is equipped with dish-like pressure transmission barrier film, and the upper end is equipped with pressure sensor.
The collection of grouting pressure collecting unit is for the pressure of slurry point, this pressure signal is delivered to control circuit after being exaggerated processing by pressure signal processing circuit, control module is sent a control signal of control electric throttle valve rotation direction and opening amount according to the difference of setting pressure p0 and actual pressure p, this signal amplifies the rear drive electric throttle valve through the power amplification circuit of control module, reaches the purpose of control and regulation for slurry pressure.Whole system constitutes the closed loop pressure control system.
The present invention adopts the deep-well slip casting decompression schedule of the aboveground throttling control of testing pressure down hole, has realized linear continuous control, and the reliability of system can increase greatly, adopts two pressure sensors to gather pressure, control accuracy height.Whole system is simple in structure, efficient is high, easy to maintenance, cost significantly reduces.
Description of drawings
Fig. 1 is a structural principle block diagram of the present invention.
Fig. 2 is that down-hole of the present invention pipe valve is arranged schematic diagram.
Fig. 3 is that aboveground pipe valve of the present invention is arranged schematic diagram.
Fig. 4 is the structural representation of grouting pressure collecting unit among the present invention.
Fig. 5 is the structural representation of electric throttle valve among the present invention.
Fig. 6 is the schematic diagram of pressure signal processing circuit among the present invention.
Fig. 7 is the circuit theory diagrams of control module among the present invention.
Fig. 8 is a control program flow chart of the present invention.
Among the figure: 1, pressure signal processing circuit, 2, control module, 3, electric throttle valve, 4, pipeline, 5, gate valve, 6, the grouting pressure collecting unit, 7, short tube, 8, the pressure transmission barrier film, 9, oil cylinder, 10, pressure transmitter, 11, stepper motor, 12, driving gear, 13, driven gear, 14, support, 15, stop valve, 16, instrumentation amplifier, 17, A/D converter, 18, photoisolator, 19, single-chip microcomputer, 20, stepper motor driving circuit.
The specific embodiment
As shown in Figure 1, the deep-well slip casting depressurized system of the aboveground throttling control of testing pressure down hole of the present invention comprises grouting pressure collecting unit 6, pressure signal processing circuit 1, control module 2 and electric throttle valve 3.Grouting pressure is gathered unit 6 and is gathered for the pressure of starching point, deliver to control module 2 after this pressure signal is processed, control module 2 is sent the rotation direction of control electric throttle valve 3 and the control signal of opening amount according to the difference of setting pressure p0 and actual pressure p, and this signal amplifies rear drive electric throttle valve 3 through the power amplification circuit of control module 2.Whole system constitutes the closed loop pressure control system.
As shown in Figure 2, grouting pressure collecting unit 6 is installed in the down-hole part of pipeline 1, and this grouting pressure collecting unit 6 comprises two pressure acquisition devices that are connected in series.The down-hole part of pipeline 1 is equipped with gate valve 5 simultaneously.The structure of each pressure acquisition device as shown in Figure 4 in the grouting pressure collecting unit 6, comprise short tube 7, dish-like pressure transmission barrier film 8, oil cylinder 9 and pressure sensor 10, oil cylinder 9 is installed on the short tube 7, be full of liquid medium in it, the lower end of oil cylinder 9 is equipped with dish-like pressure transmission barrier film 8, and the upper end is equipped with pressure sensor 10.The two ends of short tube 7 link to each other with pipeline 1, and dish-like pressure transmission barrier film 8 plays isolation and pressure transmission, and pressure sensor 10 is used to measure the pressure of liquid medium.When heavy viscous mud process short tube 7, owing to have certain pressure in the pipeline, material can be full of short tube 7, and extruding pressure transmission barrier film 8, pressure transmission barrier film 8 passes to transmission medium in the oil cylinder 9 to pressure, measure the pressure of transmission media in the oil cylinder 9 by pressure sensor 10, just can draw the pressure in the pipeline 1 indirectly.By demarcating, guarantee the pressure in the correct measuring channel course of conveying.Measure the pressure of grouting pipeline by two pressure sensors 10 on the cover grouting pressure collecting unit 6,, judge the reliable and accuracy of pressure measuring system by two pressure that pressure sensors 10 are measured relatively.When two pressure sensors 10 have identical pressure measuring value, the pressure that just adopts this to record.
As shown in Figure 3, electric throttle valve 3 is installed in the aboveground part of pipeline 1.The structure of electric throttle valve 3 is changed a social system by common stop valve 15 as shown in Figure 5, and stepper motor 11 is connected with the valve rod of driven gear 13 with stop valve 15 by driving gear 12, and stepper motor 11 is installed on the support 14.The rotation direction and the opening amount of stepper motor 11 control stop valves 15 valve rods.
The circuit theory diagrams of pressure signal processing circuit 1 as shown in Figure 6, this part is used in the down-hole.Small-signal by 6 outputs of grouting pressure sensor is amplified output appropriate signal level through variable connector conversion input instrumentation amplifier 16.Instrumentation amplifier 16 adopts the AD620 chip.This chip multiplication factor maximum can reach 10000 times.Signal by instrumentation amplifier 5 outputs reaches the volt level, for the ease of long-distance transmissions, the level signal of instrumentation amplifier 16 outputs is sent into A/D converter 17, A/D converter 17 adopts 12 bit resolutions, can obtain the exact figure signal, convert voltage signal to frequency signal.
The circuit theory of control module 2 as shown in Figure 7, this part is in aboveground use.Frequency signal by LM331 output is sent into photoisolator 18, isolates by photoelectricity, and frequency signal is sent into the counter T0 of MCS251 single-chip microcomputer 19, and the umber of pulse of being surveyed each second by counter can converse corresponding force value.By the difference of setting pressure p0 and actual pressure p, can send the pulse number of the stepper motor 11 that drives electric throttle valve 3 according to the control law of this system.Stepper motor 11 drives P in the MCS251 single-chip microcomputer 19 by the drive circuit among Fig. 7 20
1.0, P
1.1And P
1.2Three delivery outlets are used for sending control impuls, and by photoisolator driving transistors T1～T3, and T1～T3 drives Darlington transistor D1～D3, and D1～D3 drives the coil of stepper motor 11 again, and stepper motor 11 is rotated.Two paths of digital signals becomes serial signal after being handled by single-chip microcomputer 19, and the Tx end of process single-chip microcomputer 19 sends in the signal remote transmission circuit of transmission system.Control module 2 also can adopt programmable logic controller (PLC).
Owing to have various interference in the pit shaft, so the interference free performance of control module 2 should be higher.For improving the antijamming capability of control module 2, the small-signal unit in the system adopts photoisolator 18, makes it have the circuit system of one's own, has guaranteed the precision of system.In addition, single-chip microcomputer 19 systems have adopted watchdog circuit, thereby the assurance system can not produce deadlock.
For increasing the reliability of signal transmission, the present invention adopts the RS-485 communication modes to carry out the pressure signal communication, and its characteristics are: (1) RS-485/422 adopts high speed optoelectronic to isolate; (2) be provided with the serial ports holding circuit, can charged hot plug; (3) communication distance can reach 3 kilometers (9.6Kbps); (4) support 256 node polled network structures; (5) need not the CTS Flow Control, speed 0～115.2Kbps self adaptation; (6) 15KV electrostatic protection and 1200W/ms lightning protection.
Control program block diagram of the present invention as shown in Figure 8, grouting pressure collecting unit 6 is gathered the pressure p for the slurry point, deliver to control module 2 after this pressure signal is processed, control module 2 is sent the control signal of control electric throttle valve 3 rotation directions and opening amount according to the difference of setting pressure p0 and actual pressure p.As setting pressure p0 during greater than actual pressure p, control electric throttle valve 3 is just changeing, and increases the opening amount.As setting pressure p0 during less than actual pressure p, 3 counter-rotatings of control electric throttle valve reduce the opening amount.Thereby control arrives the confession slurry flow of down-hole.When the opening amount of electric throttle valve 3 reached maximum, showing breaks down should shut down.Can send the pulse number of the stepper motor 11 that drives electric throttle valve 3, the pulse number K that it is exactly stepper motor 11 that pressure difference value multiply by a coefficient k according to the control law of this system.Coefficient
Wherein
Be the rate of change of actual pressure, c is a constant, and this constant is summed up after repeatedly testing and drawn.
If grouting pipeline stops up, the pressure that depressurized system can be controlled grouting pipeline is not more than setting value (general 2.5MPa).Guarantee the safety of grouting pipeline.When 1000 meters of well depths, by decompression, (general setting pressure is 2MPa, and grouting pressure can regulate (adjustable range 0.5-----9MPa), and the pressure stability degree is at 0.25Mpa to make the work plane grouting pressure be reduced to setting pressure.
Claims (2)
1. the deep-well slip casting depressurized system of the aboveground throttling control of testing pressure down hole is characterized in that, comprises grouting pressure collecting unit, pressure signal processing circuit, control module and electric throttle valve:
The grouting pressure collecting unit: the grouting pressure collecting unit is connected the down-hole part of slurry pipeline, is used to gather the pressure for the slurry point; The grouting pressure collecting unit comprises two pressure acquisition devices that are connected in series, all be provided with pressure sensor on each pressure acquisition device, by comparing the pressure that two pressure sensors are measured, judge the reliability and the accuracy of whole pressure measuring system, when two pressure sensors have identical pressure measuring value, just gather the pressure that this records;
Pressure signal processing circuit: be connected with control module with the grouting pressure collecting unit, be used for the processing pressure signal;
Control module: be connected with pressure signal processing circuit and electric throttle valve, according to the difference output control electric throttle valve rotation direction of down-hole grouting pressure of setting and actual grouting pressure and the control signal of opening amount;
Electric throttle valve is installed in the aboveground part of slurry pipeline, comprises common stop valve and stepper motor, and the valve rod of common stop valve is connected with stepper motor, and the drive circuit of stepper motor is connected with control module.
2. the deep-well slip casting depressurized system of the aboveground throttling control of testing pressure down hole according to claim 1, it is characterized in that: described pressure acquisition device comprises short tube, dish-like pressure transmission barrier film, oil cylinder and pressure sensor, oil cylinder is installed on the short tube, be full of liquid medium in it, the lower end of oil cylinder is equipped with dish-like pressure transmission barrier film, and the upper end is equipped with pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100164157A CN101586459A (en) | 2009-06-19 | 2009-06-19 | Deep well grouting pressure reduction system for underground pressure measurement and ground throttle control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100164157A CN101586459A (en) | 2009-06-19 | 2009-06-19 | Deep well grouting pressure reduction system for underground pressure measurement and ground throttle control |
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| CN101586459A true CN101586459A (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2009100164157A Pending CN101586459A (en) | 2009-06-19 | 2009-06-19 | Deep well grouting pressure reduction system for underground pressure measurement and ground throttle control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678330A (en) * | 2012-05-08 | 2012-09-19 | 联合汽车电子有限公司 | Diagnostic method for pressure sensors in turbocharging system |
| CN106640090A (en) * | 2017-02-28 | 2017-05-10 | 安徽理工大学 | Surface pre-grouting monitoring system of newly-built coal mine deep vertical shaft under adjacent existing mineshaft condition |
-
2009
- 2009-06-19 CN CNA2009100164157A patent/CN101586459A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678330A (en) * | 2012-05-08 | 2012-09-19 | 联合汽车电子有限公司 | Diagnostic method for pressure sensors in turbocharging system |
| CN102678330B (en) * | 2012-05-08 | 2015-06-10 | 联合汽车电子有限公司 | Diagnostic method for pressure sensors in turbocharging system |
| CN106640090A (en) * | 2017-02-28 | 2017-05-10 | 安徽理工大学 | Surface pre-grouting monitoring system of newly-built coal mine deep vertical shaft under adjacent existing mineshaft condition |
| CN106640090B (en) * | 2017-02-28 | 2018-01-02 | 安徽理工大学 | Newly-built Coal Mine depth vertical pre grouting from the surface monitoring system under neighbouring existing wellbore conditions |
| WO2018157654A1 (en) * | 2017-02-28 | 2018-09-07 | 安徽理工大学 | System for monitoring ground pre-grouting of newly-built deep vertical shaft of colliery under the condition of adjacency to existing mineshaft |
| NO345682B1 (en) * | 2017-02-28 | 2021-06-14 | Univ Anhui Sci & Technology | System for monitoring ground pre-grouting of newly-built deep vertical shaft of colliery under the condition of adjacency to existing mineshaft |
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Application publication date: 20091125 |