CN110118169A - A kind of hydraulic concrete double-piston pump commutation current stabilization control system - Google Patents
A kind of hydraulic concrete double-piston pump commutation current stabilization control system Download PDFInfo
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- CN110118169A CN110118169A CN201810119622.4A CN201810119622A CN110118169A CN 110118169 A CN110118169 A CN 110118169A CN 201810119622 A CN201810119622 A CN 201810119622A CN 110118169 A CN110118169 A CN 110118169A
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- valve
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- master cylinder
- oil
- control system
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/002—Hydraulic systems to change the pump delivery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The present invention relates to double-piston pump design fields, in particular to a kind of hydraulic concrete double-piston pump commutation current stabilization control system, including oil pump, overflow valve, displacement valves, tilt cylinder pilot operated directional control valve, master cylinder pilot operated directional control valve, first logical valve, second logical valve, first master cylinder, second master cylinder, first oscillating oil cylinder and the second oscillating oil cylinder, the system is additionally arranged throttle valve repairing control module, throttle valve repairing control module includes adjustable throttling and check valve, additionally increase by one close to switch, signal is measured and acquired into PLC controller in output side for calculating concrete, current regulation for displacement valves.The present invention, which provides one kind, can make whole system when small displacement conveys material, improve cutout phenomenon and reduce commutating pulse phenomenon, keep entire transmission process steady, reduce rebound amount, improve the hydraulic concrete double-piston pump commutation current stabilization control system of construction quality.
Description
Technical field
The present invention relates to double-piston pump design field, in particular to a kind of hydraulic concrete double-piston pump commutation current stabilization control
System.
Background technique
The dual Piston concrete pumping mechanism of open-cycle system is widely used in concrete pump, mortar pump, concrete
Wet shot is mechanical, grouting pump, filling pump etc..The application field being related to has engineering machinery, underground engineering, geotechnical engineering, city's political and ideological work
Journey, hydraulic engineering, tunnel construction.The cardinal principle of concrete pumping mechanism is: passing through drive by motor (or diesel engine)
Hydrodynamic pressure oil pump pushes master cylinder, and the piston rod connection concrete piston of master cylinder moves reciprocatingly in concrete material cylinder, presses
It pushes and the pumped (conveying) mediums such as concrete or mortar is sent to carry out conveying or spraying operation.The both ends of master cylinder are installed by hydro-logic respectively
Valve controls the commutation signal of master cylinder.The commutation letter that logical valve issues when tilt cylinder pilot operated directional control valve obtains main oil cylinder piston in place
It commutates after number, oscillating oil cylinder commutation is to realize that S valve commutates, and inside issues commutation signal oil, control when oscillating oil cylinder commutates in place
Master cylinder pilot operated directional control valve commutation processed, changes the fuel feeding direction of master cylinder, to realize the commutation of master cylinder.It is original before commutation
The first master cylinder connection material cylinder be concrete material push forward, after obtaining commutation signal, S valve first commutate in place, with
The commutation of the first master cylinder, conveyor piston retreat the suction from hopper；Second master cylinder from original suction state be changed to
Preceding pusher；When cylinder bottom is back shifted in first master cylinder suction onto, the first logical valve issues commutation signal, changes tilt cylinder pilot operated directional control valve
To.So circulation, that realizes concrete continuous is pushed to hopper outlet conveyance conduit from two reciprocal dischargings of material cylinder, the company of realization
Continuous concrete conveyance operation.
Double-cylinder hydraulic piston pump due to letting out in main oil cylinder piston ring, makes to be connected to intracavitary oil mass and subtracts in the case where small displacement
It is few, the second main oil cylinder piston forward stroke in place after, the first main oil cylinder piston backward travel is still without in place, being not received by and changing
To signal, the second master cylinder rodless cavity oil enters rod chamber connection chamber by the first check valve at this time, and it is living to continue to press on master cylinder
It gets back into and moves back, commutate until reaching the first logic valve position.Thus the cutout for occurring conveying material cylinder the pusher short time forward is existing
As will appear the cutout phenomenon discontinuously pumped in pipe of concrete way outlet.Since main oil pump should carry out fuel feeding to master cylinder,
Main oil cylinder piston in place when issue commutation signal, at this time main oil pump again to oscillating oil cylinder carry out fuel feeding, wait oscillating oil cylinders to change
When to the commutation of i.e. S valve in place, then fuel feeding is carried out to master cylinder, so recycled.
It since oscillating oil cylinder must commutate rapidly, is usually completed in 0.2 second, therefore the fuel delivery in oscillating oil cylinder commutation
Must be very big, to meet 0.2 second required fuel delivery of commutation, the swash plate aperture of main oil pump is big.But when to master cylinder fuel feeding, by
Then the swash plate aperture of small displacement, fuel delivery very little, main oil pump is small.Main oil pump swash plate aperture is from will become smaller greatly, when due to commutation
Between quickly, do not become smaller also in swash plate aperture, commutation just in place, causes the beginning moment fuel delivery to master cylinder fuel feeding excessive,
Generate pulse.The cutout phenomenon and pulsation phenomenon of the unsteady flow generated during injection and slip casting due to commutation, can be direct
The quality sprayed is influenced, causes the rebound rate of material big and landing ash increases, rebound uneven to jet face generation ejecting force
Amount is big, influences the quality of construction.
Therefore it is badly in need of a kind of hydraulic concrete double-piston pump commutation current stabilization control system in open-cycle system, it can make whole
A system improves cutout phenomenon and reduces commutating pulse phenomenon, keep entire transmission process steady when small displacement conveys material,
Reduce rebound amount, improves construction quality.
Summary of the invention
In view of problem above, the present invention provides one kind, and whole system can be made when small displacement conveys material, hence it is evident that improves
The phenomenon that stops and reduction commutating pulse phenomenon, keep entire transmission process steady, reduce rebound amount, improve the coagulation of construction quality
The hydraulic double-piston pump commutation current stabilization control system of soil.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
A kind of hydraulic concrete double-piston pump commutation current stabilization control system in the present invention, including oil pump, overflow valve, discharge capacity
Valve, tilt cylinder pilot operated directional control valve, master cylinder pilot operated directional control valve, the first logical valve, the second logical valve, the first master cylinder, the second main oil
Cylinder, the first oscillating oil cylinder and the second oscillating oil cylinder, the system are additionally arranged throttle valve repairing control module, the throttle valve repairing control
Molding block includes adjustable throttling and check valve, and the extreme position of first oscillating oil cylinder is equipped with first close to switch, institute
The extreme position for stating the second oscillating oil cylinder is equipped with second close to switch, between first oscillating oil cylinder and the second oscillating oil cylinder
Equipped with tablet, the tablet, which can control, to freely swing, and described first the left lateral way limit of tablet is arranged in close to switch
Position, described second the right stroke limit position of tablet is arranged in close to switch.
The throttle valve repairing control module is arranged in oil pump to the rod chamber of the first master cylinder and the second master cylinder and is connected to
On high-pressure oil passage between chamber.
The check valve is mounted on behind throttle valve.
First logical valve and the second logical valve are separately mounted to the both ends of the first master cylinder, for changing to tilt cylinder hydraulic control
Commutation signal is issued to valve.
First oscillating oil cylinder and the commutation of the second oscillating oil cylinder issue signal afterwards in place, can control master cylinder liquid controlled reversing
Valve commutation.
The valve port size of the displacement valves determines fuel delivery of the oil pump to the first master cylinder and the second master cylinder.
The oil pump side is equipped with overflow valve, and the overflow valve is connected in parallel with oil pump, limits the maximum pressure of oil pump not
More than relief valve set pressure, play the role of safeguard protection and pressure limiting.
A method of replacement concrete conveyance piston comprises the following steps that
S1: in the state that machine is standby, adjustable throttling discharge capacity being tuned up, and enters hydraulic oil by adjustable throttling
The rod chamber of first master cylinder and the second master cylinder is connected to chamber, and two master cylinders are fallen back on cylinder bottom simultaneously, realize that two conveyings are lived
It fills in while falling back at sink；
S2: replacement conveyor piston；
S3: after finishing changing conveyor piston, adjustable throttling is turned down；
S4: the first time stroke of work, extra oil can pass through the unloading port at the cylinder bottom of the second master cylinder in rod chamber
It is discharged into hydraulic oil container, hereafter can be worked normally.
Advantages and advantages of the present invention are to provide one kind can make whole system when small displacement conveys material, it is bright
It is aobvious to improve cutout phenomenon and reduce commutating pulse phenomenon, keep entire transmission process steady, reduce rebound amount, improves construction quality
Hydraulic concrete double-piston pump commutate current stabilization control system.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is hydraulic concrete double-piston pump commutation current stabilization control system schematic diagram.
Fig. 2 is oscillating oil cylinder working condition one.
Fig. 3 is oscillating oil cylinder working condition two.
Description of symbols
1. 5. tilt cylinder pilot operated directional control valve of oil pump 2. overflow valve, 3. displacement valves, 7. master cylinder pilot operated directional control valve
9. 10. second logical valve of the first logical valve, 11. first master cylinder, 12. second master cylinder
13. 14. second 15. first check valve of oscillating oil cylinder of the first oscillating oil cylinder, 16. second one-way valve
17. 18. check valve 20. of adjustable throttling is switched close to switch 21. first is close
22. the second close switch
Specific embodiment
With reference to the accompanying drawings and examples, further description of the specific embodiments of the present invention.Following embodiment is only
For clearly illustrating technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment 1
A kind of hydraulic concrete double-piston pump commutation current stabilization control system, as shown in Figure 1, including oil pump 1, overflow valve 2, row
Measure valve 3, tilt cylinder pilot operated directional control valve 5, master cylinder pilot operated directional control valve 7, the first logical valve 9, the second logical valve 10, the first master cylinder
11, the second master cylinder 12, the first oscillating oil cylinder 13 and the second oscillating oil cylinder 14, the system are additionally arranged throttle valve repairing control mould
Block, the throttle valve repairing control module are arranged in 1 to the first master cylinder 11 of oil pump and are connected to the rod chamber of the second master cylinder 12
On high-pressure oil passage between chamber, the throttle valve repairing control module includes adjustable throttling 17 and check valve 18, and first is unidirectional
Valve 15, second one-way valve 16 are mounted on the second master cylinder 12.
First logical valve 9 and the second logical valve 10 are separately mounted to the both ends of the first master cylinder 11, are used for tilt cylinder hydraulic control
Reversal valve 5 issues commutation signal.First oscillating oil cylinder 13 and the commutation of the second oscillating oil cylinder 14 issue signal afterwards in place, can control master
Oil cylinder pilot operated directional control valve 7 commutates.The valve port sizes of displacement valves 3 determines oil pump 1 to the first master cylinder 11 and the second master cylinder 12
Fuel delivery.1 side of oil pump is equipped with overflow valve 2, and the overflow valve 2 is connected in parallel with oil pump 1, limits the maximum pressure of oil pump 1 not
Pressure is set more than overflow valve 2, plays the role of safeguard protection and pressure limiting.
By adjusting the flow of adjustable throttling 17, the topping up of oil of master cylinder rod chamber connection chamber is adjusted, to have compensated
The oil mass of rodless cavity is let out in the oil of rod cavity connection chamber, it is ensured that be connected to intracavitary oil mass and do not reduce, to keep the second master cylinder 12 living
When filling in forward in place, the piston of the first master cylinder 11, which can synchronize, shifts cylinder bottom onto.Second master cylinder, 12 piston forward in place when,
One master cylinder, 11 piston must retreat in place or slightly in advance in place to obtain commutation signal in time, shorten material caused by commutating
Convey break time.To realize before obtaining commutation signal, avoid generating since two master cylinder rod chambers are connected to chamber
Oil mass is very few, and piston rod stroke is not in place, the cutout phenomenon of generation.If the oil mass that rod chamber is connected to chamber oil pocket is excessive, can lead to
The second one-way valve 16 being mounted on the second master cylinder 12 is crossed, extra hydraulic oil is discharged in oil return line.
This is that a kind of two master cylinders of very easy realization form synchronous automatic fuel quantity compensator.Structure is simple,
By the adjustment of cartridge throttle valve, different cylinder structures, and the compensation under different operating conditions can be realized, for series of products
It is adaptable.
Also increase by one in addition to above-mentioned Curve guide impeller, in this programme close to switch, is individually placed to tablet left and right stroke
Extreme position.As shown in Figures 2 and 3, close close to switch 21 and second in two oscillating oil cylinder extreme position installations first respectively
Switch 22 is equipped with tablet 20 between first oscillating oil cylinder 13 and the second oscillating oil cylinder 14, tablet 20, which can control, to freely swing.
It is corresponding to be adopted close to switch by leaving tablet 20 when the first oscillating oil cylinder 13 and the second oscillating oil cylinder 14 just start commutation
Collect commutation signal, be input to PLC programmable controller, the control electric current of electric Electro-hydraulic Proportional Displacement valve 3 is reduced by program setting, is made
The valve port of displacement valves 3 reduces, to reduce the fuel delivery to corresponding master cylinder.Since the first oscillating oil cylinder 13 and second swings oil
The commutating speed of cylinder 14 quickly, is controlled the electric current of displacement valves 3 from collecting controller operation close to switching signal and exporting
System, oscillating oil cylinder commutate substantially in place, and for main oil pump also in huge discharge state, displacement valves 3 obtain the control of controller output at this time
The signal that electric current processed reduces, valve port reduce, fuel delivery needed for fuel delivery is reduced to normal conveying, realize that commutation is steady, reduces
Pulse.
Embodiment 2
A method of replacement concrete conveyance piston comprises the following steps that
S1: in the state that machine is standby, 17 discharge capacity of adjustable throttling being tuned up, and hydraulic oil is made to pass through adjustable throttling 17
It is connected to chamber with the rod chamber of the second master cylinder 12 into the first master cylinder 11,2 master cylinders are fallen back on into cylinder bottom simultaneously, realize 2
Conveyor piston is fallen back at sink simultaneously；
S2: replacement conveyor piston；
S3: after finishing changing conveyor piston, adjustable throttling 17 is turned down；
S4: the first time stroke of work, extra oil can pass through second at the cylinder bottom of the second master cylinder 12 in rod chamber
Check valve 16 is discharged into hydraulic oil container.Hereafter it can work normally.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
- The current stabilization control system 1. a kind of hydraulic concrete double-piston pump commutates, including oil pump, overflow valve, displacement valves, tilt cylinder hydraulic control Reversal valve, master cylinder pilot operated directional control valve, the first logical valve, the second logical valve, the first master cylinder, the second master cylinder, first swing Oil cylinder and the second oscillating oil cylinder, which is characterized in that the system is additionally arranged throttle valve repairing control module, the throttle valve repairing control Molding block includes adjustable throttling and check valve, and the extreme position of first oscillating oil cylinder is equipped with first close to switch, institute The extreme position for stating the second oscillating oil cylinder is equipped with second close to switch.
- The current stabilization control system 2. a kind of hydraulic concrete double-piston pump according to claim 1 commutates, which is characterized in that institute It states and is equipped with tablet between the first oscillating oil cylinder and the second oscillating oil cylinder, the tablet, which can control, to freely swing, and described first The left stroke limit position of tablet is set close to switch, and described second the right lateral way limit of tablet is arranged in close to switch Position.First can acquire commutation signal by leaving tablet close to switch close to switch and second, be input to PLC control system System.
- The current stabilization control system 3. a kind of hydraulic concrete double-piston pump according to claim 1 commutates, which is characterized in that institute It states throttle valve repairing control module and oil pump is set to the height between the rod chamber of the first master cylinder and the second master cylinder connection chamber Pressure oil road.
- The current stabilization control system 4. a kind of hydraulic concrete double-piston pump according to claim 1 commutates, which is characterized in that institute Check valve is stated to be mounted on behind adjustable throttling.
- The current stabilization control system 5. a kind of hydraulic concrete double-piston pump according to claim 1 commutates, which is characterized in that institute It states the first logical valve and the second logical valve is separately mounted to the both ends of the first master cylinder, for being changed to the sending of tilt cylinder pilot operated directional control valve To signal.
- The current stabilization control system 6. a kind of hydraulic concrete double-piston pump according to claim 1 commutates, which is characterized in that institute It states the first oscillating oil cylinder and the commutation of the second oscillating oil cylinder issues signal afterwards in place, can control the commutation of master cylinder pilot operated directional control valve.
- The current stabilization control system 7. a kind of hydraulic concrete double-piston pump according to claim 1 commutates, which is characterized in that institute The valve port size for stating displacement valves determines fuel delivery of the oil pump to the first master cylinder and the second master cylinder.
- The current stabilization control system 8. a kind of hydraulic concrete double-piston pump according to claim 1 commutates, which is characterized in that institute Oil pump side is stated equipped with overflow valve, the overflow valve is connected in parallel with oil pump, and the maximum pressure for limiting oil pump is no more than overflow valve Pressure is set, safeguard protection and pressure limiting are played the role of.
- 9. a kind of method for replacing concrete conveyance piston, comprises the following steps thatS1: in the state that machine is standby, adjustable throttling discharge capacity being tuned up, and hydraulic oil is made to enter first by adjustable throttling The rod chamber of master cylinder and the second master cylinder is connected to chamber, and two master cylinders are fallen back on cylinder bottom simultaneously, realize that two conveyor pistons are same When fall back at sink；S2: replacement conveyor piston；S3: after finishing changing conveyor piston, adjustable throttling is turned down；S4: the first time stroke of work, extra oil can be discharged by the unloading port at the cylinder bottom of the second master cylinder in rod chamber Hereafter hydraulic oil container can work normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810119622.4A CN110118169A (en) | 2018-02-06 | 2018-02-06 | A kind of hydraulic concrete double-piston pump commutation current stabilization control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810119622.4A CN110118169A (en) | 2018-02-06 | 2018-02-06 | A kind of hydraulic concrete double-piston pump commutation current stabilization control system |
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| Publication Number | Publication Date |
|---|---|
| CN110118169A true CN110118169A (en) | 2019-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810119622.4A Pending CN110118169A (en) | 2018-02-06 | 2018-02-06 | A kind of hydraulic concrete double-piston pump commutation current stabilization control system |
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| CN (1) | CN110118169A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966266A (en) * | 2019-12-30 | 2020-04-07 | 青岛九合重工机械有限公司 | Novel single-pump hydraulic control pumping system |
| CN113062886A (en) * | 2021-03-17 | 2021-07-02 | 中国铁建重工集团股份有限公司 | Electronic pressure flow composite control grouting hydraulic system and control method |
| CN115143072A (en) * | 2022-07-07 | 2022-10-04 | 中联重科股份有限公司 | Control method for pumping system, processor and pumping system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110966266A (en) * | 2019-12-30 | 2020-04-07 | 青岛九合重工机械有限公司 | Novel single-pump hydraulic control pumping system |
| CN113062886A (en) * | 2021-03-17 | 2021-07-02 | 中国铁建重工集团股份有限公司 | Electronic pressure flow composite control grouting hydraulic system and control method |
| CN113062886B (en) * | 2021-03-17 | 2024-03-01 | 中国铁建重工集团股份有限公司 | Electronic pressure and flow composite control grouting hydraulic system and control method |
| CN115143072A (en) * | 2022-07-07 | 2022-10-04 | 中联重科股份有限公司 | Control method for pumping system, processor and pumping system |
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Application publication date: 20190813 |