CN103047227B - Back-flushing filtering device and working surface hydraulic system - Google Patents
Back-flushing filtering device and working surface hydraulic system Download PDFInfo
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- CN103047227B CN103047227B CN201210559433.1A CN201210559433A CN103047227B CN 103047227 B CN103047227 B CN 103047227B CN 201210559433 A CN201210559433 A CN 201210559433A CN 103047227 B CN103047227 B CN 103047227B
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- flushing filtering
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Abstract
The invention discloses a kind of back-flushing filtering device and working surface hydraulic system.This back-flushing filtering device comprises selector valve, filter and accumulator; The liquid entering hole of described filter is optionally connected to feed pathway or apocenosis passage by described selector valve, and the liquid outlet of described filter is connected to liquid outlet channel; Described accumulator is connected on liquid outlet channel.Implement the embodiment of the present invention, the backwash to single filter can be realized, and due to accumulator store counter-flushing liquid prior through frit mistake, therefore, the turbidity test of counter-flushing liquid are guaranteed, can not cause the secondary pollution of filter element; In addition, by selecting suitable accumulator or suitable accumulator number, the flow of backwash can be made to meet and to use needs; In addition, accumulator is arranged on liquid outlet channel, can effective Absorbing hydraulic pulsation, reduces vibrations and noise; In addition, the element needed for this back-flushing filtering device is less, and structure is simple, and cost is lower.
Description
Technical field
The present invention relates to backwash filter technical field, particularly a kind of back-flushing filtering device and working surface hydraulic system.
Background technique
In underground coal mine environment, the general emulsion pump that adopts provides emulsified liquid for hydraulic equipments such as hydraulic supports.In emulsified liquid, objectionable impurities too much will have a strong impact on the normal work of hydraulic system, such as, make very small―gap suture in hydraulic element between relative movement part and throttling pore and gap etc. are stuck or blocking.
Therefore, need first to be filtered by filter before emulsified liquid enters hydraulic system, but after a long time use, the attached crop of impurity on the filter core of filter etc. are by cumulative, thus cause the strainability of filter to decline, thus the filtration needs of emulsified liquid cannot be met.
Existing back-flushing filtering device has at least two filters, needs are counter clean time, the first filter is generally made to be in normal filtration state, and control selector valve commutation, the liquid outlet of the first filter is made to be communicated in the liquid entering hole of the second filter and to make the liquid outlet of the second filter be communicated in apocenosis passage, and then the high-pressure emulsion making emulsion pump provide arrives the liquid entering hole of the second filter after the first metre filter, apocenosis passage is expelled to from the liquid entering hole of the first filter after backwash is carried out to the filter core of the first filter, thus realize the backwash effect of the first filter element, the backwash process of the second filter is similar to the above.
But when back-flushing filtering device only has a filter, the emulsified liquid of backwash cannot first be filtered, and turbidity test cannot ensure, easily causes the secondary pollution of filter core and working surface emulsified liquid.
Summary of the invention
In view of this, the present invention is intended to propose a kind of back-flushing filtering device and working surface hydraulic system, can realize the backwash to single filter, and being filtered of counter-flushing liquid, turbidity test are guaranteed.
On the one hand, the invention provides a kind of back-flushing filtering device, this back-flushing filtering device comprises selector valve, filter and accumulator; The liquid entering hole of described filter is optionally connected to feed pathway or apocenosis passage by described selector valve, and the liquid outlet of described filter is connected to liquid outlet channel; Described accumulator is connected on liquid outlet channel.
Further, described back-flushing filtering device also comprises stop valve, on the liquid outlet channel between the liquid outlet that described stop valve is arranged at described accumulator and described filter.
Further, described back-flushing filtering device also comprises the first pressure gauge and the second pressure gauge, and described first pressure gauge is connected in described feed pathway, and described second pressure gauge is connected to the liquid outlet of described filter.
Further, described back-flushing filtering device also comprises the first pressure transducer and the second pressure transducer, and described first pressure transducer is connected in described feed pathway, and described second pressure transducer is connected to the liquid outlet of described filter.
Further, described selector valve is solenoid valve, and in an initial condition, the liquid entering hole of described filter is connected to feed pathway by described selector valve; Described back-flushing filtering device also comprises ECU (Electrical Control Unit), described ECU (Electrical Control Unit) comprises computing module, judge module and puocessing module, and the pressure signal that described computing module calculates this first pressure signal and this second pressure signal according to the second pressure signal that the first pressure signal of described first pressure transducer feedback and described second pressure transducer feed back is poor; Described judge module judges whether described pressure signal difference is more than or equal to the first predefined value; Described puocessing module controls described selector valve when described pressure signal difference is more than or equal to the first predefined value and obtains electric.
Further, described selector valve is hydraulic control valve, and described back-flushing filtering device also comprises pilot valve, and the hydraulic control end of described selector valve is optionally connected to control channel or drain path by described pilot valve.
Further, the liquid feeding end of described control channel is connected to the liquid outlet of described filter.
Further, described pilot valve is solenoid valve, and in an initial condition, the liquid entering hole of described filter is connected to feed pathway by described selector valve; The hydraulic control end of described selector valve is connected to drain path by described pilot valve.
Further, described back-flushing filtering device also comprises ECU (Electrical Control Unit), and described ECU (Electrical Control Unit) comprises computing module, judge module and puocessing module; The pressure signal that described computing module calculates this first pressure signal and this second pressure signal according to the second pressure signal that the first pressure signal of described first pressure transducer feedback and described second pressure transducer feed back is poor; Described judge module judges whether described pressure signal difference is more than or equal to the second predefined value; Described puocessing module controls described pilot valve when described pressure signal difference is more than or equal to the second predefined value and obtains electric.
On the other hand, present invention also offers a kind of working surface hydraulic system, the liquid entering hole of described working surface hydraulic system is connected on the liquid outlet channel of the back-flushing filtering device described in above-mentioned any one.
When back-flushing filtering device of the present invention is in filtration operating mode, selector valve is in original state, the liquid entering hole of filter is connected to feed pathway by selector valve, liquid outlet is connected to liquid outlet channel, thus the highly pressurised liquid exported by the liquid pump (as emulsion pump or oil pump) being connected to feed pathway is supplied to the hydraulic system be connected with liquid outlet channel after filtering, under filtration operating mode, accumulator is in energy accumulating state; When back-flushing filtering device is in backwash operating mode, control selector valve commutates, the liquid entering hole of filter is made to be connected to apocenosis passage by selector valve, accumulator works simultaneously, the highly pressurised liquid that accumulator exports arrives the liquid outlet of filter, apocenosis passage is entered after backwash is carried out to the filter core of filter, thus the backwash achieved single filter, and the counter-flushing liquid stored due to accumulator is prior through frit mistake, therefore, the turbidity test of counter-flushing liquid are guaranteed, can not cause the secondary pollution of filter element; In addition, by selecting suitable accumulator or suitable accumulator number, the flow of backwash can be made to meet and to use needs; In addition, accumulator is arranged on liquid outlet channel, when filtering operating mode, can effective Absorbing hydraulic pulsation, and reduce and shake and noise;
In addition, the element needed for back-flushing filtering device of the present invention is less, and structure is simple, and cost is lower.Working surface hydraulic system provided by the invention is connected with above-mentioned back-flushing filtering device, and because above-mentioned back-flushing filtering device has above-mentioned technique effect, therefore this working surface hydraulic system also has corresponding technique effect.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
A kind of principle schematic for back-flushing filtering device that Fig. 1 provides for the embodiment of the present invention.Symbol description:
1 second pressure gauge
2 second pressure transducers
3 filters
4 first pressure gauges
5 first pressure transducers
6 selector valves
7 pilot valves
8 accumulators
9 stop valves
01 feed pathway
02 apocenosis passage
03 liquid outlet channel
04 control channel.
Embodiment
To it should be pointed out that in this part to the description of concrete structure and description order it is only explanation to specific embodiment, should not be considered as there is any restriction to protection scope of the present invention.In addition, when not conflicting, the embodiment in this part and the feature in embodiment can combine mutually.
Please refer to Fig. 1, below in conjunction with embodiment, the present invention is elaborated.
As shown in the figure, the back-flushing filtering device of this embodiment comprises described back-flushing filtering device and comprises selector valve 6, filter 3 and accumulator 8.
Wherein, the liquid entering hole of filter 3 is optionally connected to feed pathway 01 or apocenosis passage 02 by selector valve 6, namely selector valve 6 at least has two kinds of working positions, in the first working position, the liquid entering hole of filter 3 is communicated with feed pathway 01 by selector valve 6, in the second working position, the liquid entering hole of filter 3 is communicated with apocenosis passage 02 by selector valve 6, preferably, selector valve 6 is two-position three-way valve, and the first working position is original state; The liquid outlet of filter 3 is connected to liquid outlet channel 03; Accumulator 8 is connected on liquid outlet channel 03.
In use, the back-flushing filtering device of above-described embodiment has following two kinds of operating modes: one, when filtering operating mode, selector valve 6 is in the first working position (original state), the liquid entering hole of filter 3 is connected to feed pathway 01 by selector valve 6, liquid outlet is connected to liquid outlet channel 03, thus the highly pressurised liquid exported by the liquid pump (as emulsion pump or oil pump) being connected to feed pathway 01 is supplied to the hydraulic system (as working surface hydraulic system) be connected with liquid outlet channel 03 after filtering, under filtration operating mode, accumulator 8 is in energy accumulating state;
Two, when being in backwash operating mode, control selector valve 6 commutation and be in the second working position, the liquid entering hole of filter 3 is made to be connected to apocenosis passage 02 by selector valve 6, accumulator 8 works simultaneously, the highly pressurised liquid that accumulator 8 exports arrives the liquid outlet of filter 3, apocenosis passage 02 is entered after backwash is carried out to the filter core of filter 3, thus the backwash achieved single filter, and the counter-flushing liquid stored due to accumulator 8 is prior filtered through filter 3, therefore, the turbidity test of counter-flushing liquid are guaranteed, the secondary pollution of filter 3 filter core can not be caused, in addition, by selecting suitable accumulator 8 or suitable accumulator number, the flow of backwash can be made to meet and to use needs, in addition, accumulator is arranged on liquid outlet channel, when filtering operating mode, can effective Absorbing hydraulic pulsation, and reduce and shake and noise, in addition, the element needed for the back-flushing filtering device of this embodiment is less, and structure is simple, and cost is lower.
It should be noted that, in specific implementation process, the back-flushing filtering device of above-described embodiment can also make one or more optimal design following:
One, this back-flushing filtering device also comprises stop valve 9 (such as ball check valve), in fluid path between the liquid outlet that stop valve 9 is arranged at accumulator 8 and filter 3, like this when needing the filter core changing filter 3, stop valve 9 can be closed, disconnect the relation of liquid pump and feed pathway 01, wait until that filter 3 pressure at both sides is to carry out the replacing of filter core after zero.
Two, this back-flushing filtering device also comprises the first pressure gauge 4 and the second pressure gauge 1, first pressure gauge 4 is connected in feed pathway 01, second pressure gauge 1 is connected to the liquid outlet of filter 3, is so provided with the front and back pressure difference helping filter response 3 intuitively, for filter core stopping state provides foundation.
Three, any one situation following is adopted:
1, solenoid valve (not providing this situation in Fig. 1) selected by selector valve 6, and this back-flushing filtering device also comprises the first pressure transducer 5 and the second pressure transducer 2, wherein, first pressure transducer 5 is connected in feed pathway 01, and the second pressure transducer 2 is connected to the liquid outlet of filter.Further, this back-flushing filtering device also comprises ECU (Electrical Control Unit), this ECU (Electrical Control Unit) comprises computing module, judge module and puocessing module, wherein, the pressure signal that computing module is used for calculating according to the first pressure signal of the first pressure transducer 5 feedback and the second pressure signal of the second pressure transducer 2 feedback this first pressure signal and this second pressure signal is poor, judge module is for judging whether this pressure signal difference is more than or equal to the first predefined value, and puocessing module is used for controlling selector valve 6 when described pressure signal difference is more than or equal to the first predefined value and obtains electric; Until this pressure signal difference is less than the first predefined value; The automatic backwash to filter 3 can be realized like this; When implementing, this ECU (Electrical Control Unit) can adopt special circuit or PLC (ProgrammableLogicController, programmable logic controller (PLC)) to build.
2, hydraulic control valve selected by selector valve 6, and this back-flushing filtering device also comprises pilot valve 7, first pressure transducer 5 and the second pressure transducer 2, wherein, first pressure transducer 5 is connected in feed pathway 01, second pressure transducer 2 is connected to the liquid outlet of filter, the hydraulic control end of selector valve 6 is optionally connected to control channel 04 or drain path by pilot valve 7, namely pilot valve 7 at least has two kinds of working positions, in the first working position, the hydraulic control end of selector valve 6 leads to drain path (fuel tank), in the second working position, the hydraulic control end of selector valve 6 communicates with control channel 04, that is the working state of selector valve 6 can be controlled by the working state controlling pilot valve 7, preferably, pilot valve 7 is two-position three-way valve, and the first working position is original state, in addition, the liquid feeding end of control channel 04 is preferably connected to the liquid outlet of filter 3, can certainly be connected to other pressure liquid sources.Further, this pilot valve is solenoid valve, this back-flushing filtering device also comprises ECU (Electrical Control Unit), this ECU (Electrical Control Unit) comprises computing module, judge module and puocessing module, wherein, the pressure signal that the second pressure signal that computing module is used for feeding back according to the first pressure signal and second pressure transducer 2 of the first pressure transducer 5 feedback calculates this first pressure signal and this second pressure signal is poor; Judge module is for judging whether this pressure signal difference is more than or equal to the second predefined value, and puocessing module is used for controlling pilot valve 7 when described pressure signal difference is more than or equal to the second predefined value and obtains electric; Until this pressure signal difference is less than the second predefined value; The automatic backwash to filter 3 can be realized like this; When implementing, this ECU (Electrical Control Unit) can adopt special circuit or PLC to build.
The embodiment of the present invention additionally provides a kind of working surface hydraulic system, as support hydraulic system, the liquid entering hole of this working surface hydraulic system is connected to the liquid outlet channel of the back-flushing filtering device described in above-described embodiment, because above-mentioned back-flushing filtering device has above-mentioned technique effect, therefore, this working surface hydraulic system also should possess corresponding technique effect, the specific implementation process of its appropriate section is similar to the above embodiments, the specific implementation process of other parts see the associated description of prior art, hereby can not repeat.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a back-flushing filtering device, is characterized in that: described back-flushing filtering device comprises selector valve (6), filter (3) and accumulator (8); The liquid entering hole of described filter (3) is optionally connected to feed pathway (01) or apocenosis passage (02) by described selector valve (6), and the liquid outlet of described filter (3) is connected to liquid outlet channel (03); Described accumulator (8) is connected on liquid outlet channel (03);
Described back-flushing filtering device also comprises the first pressure transducer (5) and the second pressure transducer (2), described first pressure transducer (5) is connected in described feed pathway (01), and described second pressure transducer (2) is connected to the liquid outlet of described filter (3);
Described back-flushing filtering device also comprises ECU (Electrical Control Unit), described ECU (Electrical Control Unit) comprises computing module, judge module and puocessing module, and the pressure signal that the first pressure signal that described computing module feeds back according to described first pressure transducer (5) and the second pressure signal that described second pressure transducer (2) feeds back calculate this first pressure signal and this second pressure signal is poor; Described judge module judges whether described pressure signal difference is more than or equal to the first predefined value; Described puocessing module controls described selector valve (6) commutation when described pressure signal difference is more than or equal to the first predefined value.
2. back-flushing filtering device as claimed in claim 1, it is characterized in that: described back-flushing filtering device also comprises stop valve (9), on the liquid outlet channel between the liquid outlet that described stop valve (9) is arranged at described accumulator (8) and described filter (3).
3. back-flushing filtering device as claimed in claim 1, it is characterized in that: described back-flushing filtering device also comprises the first pressure gauge (4) and the second pressure gauge (1), described first pressure gauge (4) is connected in described feed pathway (01), and described second pressure gauge (1) is connected to the liquid outlet of described filter (3).
4. the back-flushing filtering device as described in claims 1 to 3 any one, it is characterized in that: described selector valve (6) is solenoid valve, and in an initial condition, the liquid entering hole of described filter (3) is connected to feed pathway (01) by described selector valve (6); Described puocessing module controls described selector valve (6) and obtains electric when described pressure signal difference is more than or equal to the first predefined value.
5. the back-flushing filtering device as described in claims 1 to 3 any one, it is characterized in that: described selector valve (6) is hydraulic control valve, described back-flushing filtering device also comprises pilot valve (7), and the hydraulic control end of described selector valve (6) is optionally connected to control channel (04) or drain path by described pilot valve (7).
6. back-flushing filtering device as claimed in claim 5, is characterized in that: the liquid feeding end of described control channel (04) is connected to the liquid outlet of described filter (3).
7. back-flushing filtering device as claimed in claim 5, it is characterized in that: described pilot valve (7) is solenoid valve, and in an initial condition, the liquid entering hole of described filter (3) is connected to feed pathway (01) by described selector valve (6); The hydraulic control end of described selector valve (6) is connected to drain path by described pilot valve (7).
8. back-flushing filtering device as claimed in claim 7, is characterized in that: described puocessing module controls described pilot valve (7) and obtains electric when described pressure signal difference is more than or equal to the second predefined value.
9. a working surface hydraulic system, is characterized in that, the liquid entering hole of described working surface hydraulic system is connected on the liquid outlet channel (03) of the back-flushing filtering device described in any one of claim 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210559433.1A CN103047227B (en) | 2012-12-20 | 2012-12-20 | Back-flushing filtering device and working surface hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210559433.1A CN103047227B (en) | 2012-12-20 | 2012-12-20 | Back-flushing filtering device and working surface hydraulic system |
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| CN103047227A CN103047227A (en) | 2013-04-17 |
| CN103047227B true CN103047227B (en) | 2016-04-06 |
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| CN201210559433.1A Active CN103047227B (en) | 2012-12-20 | 2012-12-20 | Back-flushing filtering device and working surface hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470567A (en) * | 2013-09-26 | 2013-12-25 | 镇江金天辰新材料有限公司 | Trailer system of skid loader |
| CN105621534B (en) * | 2014-11-06 | 2020-06-05 | 佛山市顺德区美的饮水机制造有限公司 | High pressure energy storage backwash filter equipment |
| CN105484778B (en) * | 2015-11-27 | 2017-10-20 | 太原科技大学 | A kind of hydraulic support column economizer and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1304940A1 (en) * | 1985-05-24 | 1987-04-23 | Предприятие П/Я А-7179 | Bench for washing articles |
| DE19911068A1 (en) * | 1999-03-12 | 2000-09-14 | Bayerische Motoren Werke Ag | Fuel system for a motor vehicle |
| JP3947098B2 (en) * | 2002-12-04 | 2007-07-18 | 和興フィルタテクノロジー株式会社 | Hydraulic oil filtration device |
| CN101614225B (en) * | 2009-07-07 | 2012-07-04 | 中国矿业大学 | Automatic discharge and self-cleaning filter device for emulsion pump station |
| CN201711033U (en) * | 2010-05-31 | 2011-01-19 | 三一重型装备有限公司 | High-pressure automatic back flushing filter station |
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