CN201802607U - Electrohydraulic control system applied to concrete or coal slurry conveying device - Google Patents
Electrohydraulic control system applied to concrete or coal slurry conveying device Download PDFInfo
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- CN201802607U CN201802607U CN2010205637973U CN201020563797U CN201802607U CN 201802607 U CN201802607 U CN 201802607U CN 2010205637973 U CN2010205637973 U CN 2010205637973U CN 201020563797 U CN201020563797 U CN 201020563797U CN 201802607 U CN201802607 U CN 201802607U
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Abstract
The utility model discloses an electrohydraulic control system applied to a concrete or a coal slurry conveying device, comprising a PLC (Programmable Logic Controller), a swinging S pipe, a sensor, a pumping oil cylinder, a hydraulic pump, an overflow valve, three M type three-position four-way electrohydraulic reversing valves, an oil tank, a stirring oil way, a pumping oil way and a swinging oil way, wherein a T port of the first M type three-position four-way electrohydraulic reversing valve is connected with a P port of the second M type three-position four-way electrohydraulic reversing valve; in the utility model, the sensor acted by catches on the pumping oil cylinder and the swinging oil cylinder generates signals that are received by the PLC, the PLC is acted on the two electrohydraulic reversing valves successively in a time-sharing manner according to the program set inside, and the two electrohydraulic reversing valves control the on-off of the oil ways flowing to the pumping oil cylinder and the swinging oil cylinder. The electrohydraulic control system has the advantages of low oil temperature, low noise, long service life, low manufacture and maintenance cost, low energy consumption and high reliability.
Description
[technical field]
The utility model relates to the hydraulic system field, relates in particular to a kind of method that is applied to the electrohydraulic control system of concrete or coal slime feedway and controls this system.
[background technique]
The electrohydraulic control system of concrete or coal slime feedway, be applied in concrete or coal slime carry in the function of pumping, distribution and the stirring of finishing concrete or coal slime.The patent No. is 200510031258.9 Chinese utility model patent, a kind of concrete pump hydraulic system auxiliary energy-storage flow-increasing device (two) is disclosed, the background technique of this patent documentation and model utility content displaying two kinds of electrohydraulic control systems, a kind of by working oil path with stir oil circuit and constitute promptly so-called double pump fuel feeding; A kind of by the pumping oil circuit, distribute oil circuit and stir oil circuit and constitute promptly so-called three oil pump feeds; The former adopts the working method of the two oil returns of single oil-feed, need lean on damming mutually of electro-hydraulic reversing valve to keep-up pressure during hydraulic work system, and the pressurization of damming for a long time can make electro-hydraulic reversing valve let out in increasing, and also causes oily temperature rise simultaneously, shorten the working life of oil hydraulic pump and electro-hydraulic reversing valve, the energy consumption height.The latter is under the situation that need are controlled cost, because power plant power is certain, enough big for guaranteeing the used hydraulic pressure pump delivery of pumping oil circuit, the used hydraulic pump discharge of swing distribution oil circuit can not be too big, for guaranteeing the swing commutation rapidly, the swing oil circuit need increase shops such as constant voltage and energy storage and help device, and long-term constant voltage can cause oily temperature rise, and working efficiency reduces, the energy consumption height, oil hydraulic pump is fragile, if use high-power power plant, Economy can descend.All oil cylinders all need to be in pressure state during the two work, and operational noise is big, the rate of fault height.The utility model is under a kind of like this background technique and develop.
[model utility content]
Problem to be solved in the utility model is, defective at the prior art existence, a kind of electrohydraulic control system that is applied to concrete or coal slime feedway is provided, by change that oil circuit connects and the method for work schedule make this system help to reduce oil circuit working oil temperature, reduce operational noise, reduce the work energy consumption, improve parts working life, improve the reliability of hydraulic system.
In order to solve the technical problem of above-mentioned existence, the utility model adopts following technical proposal:
A kind of electrohydraulic control system that is applied to concrete or coal slime feedway, include PLC, but be connected with PLC and the first sensor of wobble detection S pipe position, second sensor, be connected with PLC and can detect first respectively, the 3rd of the second pump oil cylinder position, four-sensor, by oil hydraulic pump, relief valve, fuel tank, stir oil circuit, the hydraulic system that pumping oil circuit and swing oil circuit constitute, hydraulic system also includes three M type 3-position 4-way electro-hydraulic reversing valves by PLC control, wherein first M type 3-position 4-way electro-hydraulic reversing valve and the first pumping oil cylinder, the second pumping oil cylinder connects, second the M type 3-position 4-way electro-hydraulic reversing valve and first oscillating oil cylinder, second oscillating oil cylinder connects; The 3rd M type 3-position 4-way electro-hydraulic reversing valve is connected with the stirring oil hydraulic motor, it is characterized in that described first M type 3-position 4-way electro-hydraulic reversing valve T mouth links to each other with second M type 3-position 4-way electro-hydraulic reversing valve P mouth, described oil hydraulic pump includes Main Hydraulic Pump and secondary oil hydraulic pump, Main Hydraulic Pump is connected with first M type 3-position 4-way electro-hydraulic reversing valve P mouth, and secondary oil hydraulic pump is connected with the 3rd M type 3-position 4-way electro-hydraulic reversing valve P mouth; Described relief valve comprises first relief valve and second relief valve, first relief valve is arranged on the oil circuit between Main Hydraulic Pump and first M type 3-position 4-way electro-hydraulic reversing valve, and second relief valve is arranged on the oil circuit between described first M type 3-position 4-way electro-hydraulic reversing valve and second the M type 3-position 4-way electro-hydraulic reversing valve.
Further design, the control oil channel of described first M type 3-position 4-way electro-hydraulic reversing valve, second M type 3-position 4-way electro-hydraulic reversing valve is connected with secondary oil hydraulic pump.
The utility model compared with prior art has following advantage:
The utility model acts on sensor by the catch on pumping oil cylinder and the oscillating oil cylinder, make sensor send signal and received by PLC, timesharing successively acts on first and second two electro-hydraulic reversing valves to PLC according to the program of its inner setting, and two electro-hydraulic reversing valve control flows are to the oil circuit break-make of pumping oil cylinder and oscillating oil cylinder; Electrohydraulic control system is by the accurate timesharing control to two electro-hydraulic reversing valves and four sensors, monitoring, make oil circuit only need to connect an electro-hydraulic reversing valve constantly and come driving oil cylinder a job, and another electro-hydraulic reversing valve be in reset mode make the hydraulic oil non-resistance by and make the oil cylinder that is connected on this electro-hydraulic reversing valve be in the shutoff buffer status, by first in the oil circuit, second relief valve can be adjusted the Maximum operating pressure of pumping oil cylinder and oscillating oil cylinder respectively, therefore it is low to have the oil temperature, noise is little, long service life, it is low to make maintenance cost, energy consumption is low, the advantage that reliability is high.
[description of drawings]
Be described in further detail below in conjunction with accompanying drawing and mode of execution of the present utility model:
Fig. 1 is the schematic diagram of electrohydraulic control system of the present utility model.
Fig. 2 is sensor of the present utility model, electro-hydraulic reversing valve and PLC connection diagram.
Fig. 3 is the cooperation theory structure schematic representation that main pump of the present utility model send oil cylinder and oscillating oil cylinder.
Fig. 4 is the blast structural representation of Fig. 3.
[embodiment]
Shown in Fig. 1～2, a kind of method that is applied to the electrohydraulic control system of concrete or coal slime feedway and controls this system, comprise Main Hydraulic Pump 1, secondary oil hydraulic pump 2, drive the power plant 3 of Main Hydraulic Pump 1 and 2 work of secondary oil hydraulic pump, be used to set the relief valve 9 of pumping pressure, be used to set the relief valve 13 of swing pressure, can limit the Maximum operating pressure of pumping oil cylinder and oscillating oil cylinder respectively by relief valve 9 and relief valve 13, guarantee security of system, lower fault, be used to push the concrete first pumping oil cylinder 19, the second pumping oil cylinder 20, be used to be connected to the swing S pipe 31 of aforementioned two pumping oil cylinder discharge ports, be used to drive the oscillating oil cylinder 21 of swing S pipe 31 swings, 22; Being provided with on swing S pipe 31 can be with the fan-shaped block 30 of its swing, feedway is provided with and is used for wobble detection S and manages first of 31 positions, two sensors 28,29, be used to detect first, the second pumping oil cylinder 19, the 3rd of 20 positions, four- sensor 26,27, three M type 3-position 4-way electro- hydraulic reversing valves 8,12,15, a PLC33 (programmable controller), first, two pumping oil cylinders 19, being equipped with respectively on 20 the piston rod can be by the 3, four-sensor 26, the link stopper 34 of 27 inductions, 35, above-mentioned oscillating oil cylinder 21,22 are connected swing S manages 31 both sides, is " eight " font; Above-mentioned four sensors and three M type 3-position 4-way electro-hydraulic reversing valves are connected respectively on the PLC 33, first and second pumping oil cylinder 19,20 is connected on the electro-hydraulic reversing valve 8, oscillating oil cylinder 21,22 is connected on the electro-hydraulic reversing valve 12, the T mouth of electro-hydraulic reversing valve 8 is connected with the P mouth of electro-hydraulic reversing valve 12, the control oil channel of above-mentioned three M type 3-position 4-way electro-hydraulic reversing valves is connected with secondary oil hydraulic pump, for control oil channel provides the control usefulness of relatively low pressure oily, the working life of improving electro-hydraulic reversing valve.
Working procedure of the present utility model is as follows:
In conjunction with Fig. 1 to Fig. 4, after power plant 3 start, when not sending the pumping instruction, system is in unloaded state, hydraulic circuit is set the highest safety pressure of pumping by the relief valve 9 that is connected with Main Hydraulic Pump, the oil-feed P mouth that connects electro-hydraulic reversing valve 8 then, connect relief valve 13 respectively through the oil return T of electro-hydraulic reversing valve 8 mouth and set the Maximum operating pressure of swing assign action and the oil-feed P mouth of electro-hydraulic reversing valve 12, carry out oil circulation work through the oil return T of electro-hydraulic reversing valve 12 mouth connection sink 24 and oil return filter cleaner 6.
After sending the pumping instruction, when sensor 28 sense on the swing S pipe 31 baffle plate 30 near the time start at once and send signal, PLC 33 receives and sends signal instruction electro-hydraulic reversing valve 12 dead electricity valve cores behind the signal and reset, oscillating oil cylinder 21,22 stop action and oil inlet and outlet A2, B2 is in closed state, make swing S pipe 31 form buffering with concrete resistance, PLC 33 1Y that sends signal instruction electro-hydraulic reversing valve 8 holds then, make the P of electro-hydraulic reversing valve 8, A1 connects, T, B1 connects, the 19 rollback suctions of the first pumping oil cylinder, the second pumping oil cylinder 20 feeding of advancing; When sensor 26 sense on the first pumping oil cylinder, 19 piston rods link stopper 34 near the time start at once and send signal, PLC 33 receives and sends signal instruction electro-hydraulic reversing valve 8 dead electricity valve cores behind the signal and reset, first, two pumping oil cylinders 19,20 stop action and oil inlet and outlet A1, B1 is in closed state, make first, two pumping oil cylinders 19,20 form buffering with the resistance of high pressure concrete, PLC 33 4Y that sends signal instruction electro-hydraulic reversing valve 12 holds then, make the P of electro-hydraulic reversing valve 12, B2 connects, T, A2 connects, oscillating oil cylinder 21,22 promote swing S pipe 31 moves to respective direction; When sensor 29 sense on the swing S pipe 31 washer 30 near the time start at once and send signal, PLC 33 receives and sends signal instruction electro-hydraulic reversing valve 12 dead electricity valve cores behind the signal and reset, oscillating oil cylinder 21,22 stops action and oil inlet and outlet A2, B2 are in closed state, make swing S pipe 31 form buffering with concrete resistance, PLC 33 2Y that sends signal instruction electro-hydraulic reversing valve 8 holds then, P, the B1 of electro-hydraulic reversing valve 8 are connected, T, A1 connect, the feeding of advancing of the first pumping oil cylinder 19, the 20 rollback suctions of the second pumping oil cylinder; When sensor 27 sense on pumping oil cylinder 20 piston rods link stopper near the time start at once and send signal, PLC 33 receives and sends signal instruction electro-hydraulic reversing valve 8 dead electricity valve cores behind the signal and reset, first, two pumping oil cylinders 19,20 stop action and oil inlet and outlet A1, B1 is in closed state, make first, two pumping oil cylinders 19,20 form buffering with the resistance of high pressure concrete, simultaneously PLC 33 3Y that sends signal instruction electro-hydraulic reversing valve 12 holds, make the P of electro-hydraulic reversing valve 12, A2 connects, T, B2 connects, oscillating oil cylinder 21,22 promote swing S valve 31 moves to respective direction; So periodic duty has formed pumping oil cylinder 19,20 and has swung accurately cooperating mutually of S pipe 31, reaches stably continuous outwards pump concrete or coal slime.
Claims (2)
1. electrohydraulic control system that is applied to concrete or coal slime feedway, include PLC, but be connected with PLC and the first sensor of wobble detection S pipe position, second sensor, be connected with PLC and can detect first respectively, the 3rd of the second pump oil cylinder position, four-sensor, by oil hydraulic pump, relief valve, fuel tank, stir oil circuit, the hydraulic system that pumping oil circuit and swing oil circuit constitute, hydraulic system also includes three M type 3-position 4-way electro-hydraulic reversing valves by PLC control, wherein first M type 3-position 4-way electro-hydraulic reversing valve and the first pumping oil cylinder, the second pumping oil cylinder connects, second the M type 3-position 4-way electro-hydraulic reversing valve and first oscillating oil cylinder, second oscillating oil cylinder connects; The 3rd M type 3-position 4-way electro-hydraulic reversing valve is connected with the stirring oil hydraulic motor, it is characterized in that described first M type 3-position 4-way electro-hydraulic reversing valve T mouth links to each other with second M type 3-position 4-way electro-hydraulic reversing valve P mouth, described oil hydraulic pump includes Main Hydraulic Pump and secondary oil hydraulic pump, Main Hydraulic Pump is connected with first M type 3-position 4-way electro-hydraulic reversing valve P mouth, and secondary oil hydraulic pump is connected with the 3rd M type 3-position 4-way electro-hydraulic reversing valve P mouth; Described relief valve comprises first relief valve and second relief valve, first relief valve is arranged on the oil circuit between Main Hydraulic Pump and first M type 3-position 4-way electro-hydraulic reversing valve, and second relief valve is arranged on the oil circuit between described first M type 3-position 4-way electro-hydraulic reversing valve and second the M type 3-position 4-way electro-hydraulic reversing valve.
2. a kind of electrohydraulic control system that is applied to concrete or coal slime feedway according to claim 1 is characterized in that the control oil channel of described first M type 3-position 4-way electro-hydraulic reversing valve, second M type 3-position 4-way electro-hydraulic reversing valve is connected with secondary oil hydraulic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205637973U CN201802607U (en) | 2010-10-11 | 2010-10-11 | Electrohydraulic control system applied to concrete or coal slurry conveying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205637973U CN201802607U (en) | 2010-10-11 | 2010-10-11 | Electrohydraulic control system applied to concrete or coal slurry conveying device |
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| Publication Number | Publication Date |
|---|---|
| CN201802607U true CN201802607U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205637973U Expired - Fee Related CN201802607U (en) | 2010-10-11 | 2010-10-11 | Electrohydraulic control system applied to concrete or coal slurry conveying device |
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| CN (1) | CN201802607U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984255A (en) * | 2010-10-11 | 2011-03-09 | 秦月明 | Electric-hydraulic control system applied in concrete or coal slurry conveying device and method for controlling system |
| CN103062166A (en) * | 2013-01-24 | 2013-04-24 | 中国铁建重工集团有限公司 | Compound pumping electro-hydraulic system |
-
2010
- 2010-10-11 CN CN2010205637973U patent/CN201802607U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101984255A (en) * | 2010-10-11 | 2011-03-09 | 秦月明 | Electric-hydraulic control system applied in concrete or coal slurry conveying device and method for controlling system |
| CN103062166A (en) * | 2013-01-24 | 2013-04-24 | 中国铁建重工集团有限公司 | Compound pumping electro-hydraulic system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20141011 |
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| EXPY | Termination of patent right or utility model |