CN2066348U - Automatic cleaning device for filter - Google Patents

Abstract

The utility model discloses an automatic-cleaning filter device which is a filtering device using air as flushing medium. The automatic-cleaning filter device can be used for various engines (comprising main and auxiliary engines), power consumption stations, mining machines, the lubrication systems of all heavy machines, and other filtering places. The automatic-cleaning filter device comprises a filter, a control system, a flushing system, a sewage discharging system, an electric line, etc. The air pressure of flushing and the pressure of the chamber of a sewage collecting shell is controlled, and an air inlet valve and a sewage discharging control valve is interlocked, so that air is prevented to enter a lubricating oil system in flushing system, and the leaking amount of sewage discharging lubricating oil is reduced. Meantime, both sides of a filtering core are used to make oil in and out, and thus the utility model has high filtering precision.

Description

Automatic cleaning device for filter

The utility model is a kind of filter plant, and it relates to a kind of lubricating oil cleaning filter, particularly a kind of lubricating oil auto-clean strainer.It can be used for various engines (comprising major and minor machine), occasion is filtered with power station, mining machinery, metallurgical industry and all heavy-duty machinery lubricating systems and other in the land.

In the prior art, lubricating oil auto-clean strainer device comprises several sections such as filter, control system, rinse-system, drainage, electric wiring substantially.From the early stage of secondary cleaner device, be to use air as scouring media, its advantage is that source of the gas is abundant, is " inexhaustible, that uses is not thirsty ", easy to use; The air pressure height is rinsed well; Apparatus structure is simple, volume is little.But it has three shortcomings: (1) air enters lubricating oil easily, and influence is used; (2) the lubricating oil leak volume is big, has increased treating capacity; (3) be by gap sealed between filter core in the filter and the housing, the gap can not be too little, and too for a short time being easy to " card " is dead, and unfiltered like this oil in the easy oil that leaks into after the filtration, influences filtering accuracy from the gap.Do not enter lubricating oil in order to solve air dielectric, roughly adopt two kinds of methods, a kind of method is no longer to make medium with air, and directly wash with lubricating oil, make lubricating oil auto-clean strainer device in this way, drive transmission mechanism with oil motor, make each filter continuously by turns from backwash, brought following shortcoming so again: (1) requires oil pump lubricating oil discharge capacity that enough surplus capacities are arranged, and for motor running and flushing continuously, use occasion is restricted; (2) the lubricating oil loss is big, needs a reclaiming system; (3) complex structure, processing difficulties, volume is big, cost is high.K8E type as Japan just belongs to this device from the secondary cleaner device.Another kind method, in device, increase a standby filter and can realize each filter control distributor of conversion automatically, when a certain filter stops up, standby filter is changed automatically by the control distributor, blocked filter is changed flushing, that is to say that this method is kept apart flushing out air and oil system.Adopt this method that following shortcoming is arranged equally: (1) complex structure, processing difficulties, volume is big, cost is high; (2) to the impurity sensitivity, flushing is frequent, the lubricating oil loss is big.As West Germany Ball ﹠amp; Kirch company produces the NW series of products and just belongs to this device.Therefore, we can say that currently used method does not all have real the solution with air as problem that scouring media was brought.

The purpose of this utility model just is to solve with the shortcoming of air as the lubricating oil auto-clean strainer device of scouring media, and promptly (1) does not make medium air enter oil system; (2) reduce the lubricating oil leak volume; (3) improve filtering accuracy.

First purpose of the present utility model is achieved in that the admission pressure of controlling flushing out air on the one hand, makes it be no more than lubricating oil rated pressure 0.1～0.2MPa; Washing control valve in will installing on the other hand and blowdown control valve interlocking, its mode can gas circuit be interlocked, but also circuit is sold through joint efforts; Throttle part in the drain outlet realizes by being installed in for second purpose; The 3rd purpose is to be realized by the sealing ring that is contained in filter housing upper and lower end inwall.

Because people are to being that the lubricating oil of scouring media exists some wrong traditional understandings towards filter device clearly automatically with the air, therefore, just can not effectively overcome its shortcoming.These traditional understandings: (1) thinks that the admission pressure of flushing out air is the bigger the better.(2) think to have only when the pressure in the blowdown chamber is identical with ambient pressure, dirt could be by discharging rapidly in the drain outlet.So just can't overcome flushing out air and enter oil system and the big problem of lubricating oil leak volume.The inventor is through years of researches, and breakthrough people's traditional understanding has found flushing out air to enter oil system and lubricating oil is sewed big reason and overcome method; (1) whether flushing out air enters oil system, removes relevantly with admission pressure, and the order of opening with washing control valve, blowdown control valve is relevant to a great extent, and it is directly connected to flushing out air No way out.If not outlet, air just can enter oil system, it is too big that certain air enters pressure, even outlet is arranged, also to enter oil system unavoidably, therefore, for not making flushing out air enter oil system, will control on the one hand the admission pressure of flushing out air, washing control valve in will install on the other hand and blowdown control valve interlocking are opened the blowdown of blowdown control valve earlier and are provided exit passageway for flushing out air before being washed by the interlocking assurance.(2) if the pressure in the blowdown chamber is identical with external atmospheric pressure, at this moment the pressure reduction maximum between it and the oil system, then have in a large amount of lubricating oil inflow blowdown chambers and discharge by the drain outlet, cause lubricating oil " in a large number " to sew, therefore, pressure in the blowdown chamber should be not identical with the external world, and should have certain pressure poor, reduce and lubricating oil between pressure differential, a large amount of lubricating oil enter the blowdown chamber and are discharged from when preventing blowdown, for this reason, and throttle part of installing in the drain outlet, to improve the pressure in the blowdown chamber, reduced sewing of lubricating oil.In addition, behind filter housing upper and lower end inwall installing sealing ring, make to obtain sealing between filter housing and the filter core, prevent the lubricating oil unfiltered lubricating oil leaks into filtration from original gap after, improved filtering accuracy.

Further set forth concrete enforcement of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is a kind of system schematic of lubricating oil auto-clean strainer device.

Fig. 2 is the auto-clean strainer structural representation.

Fig. 3 is an auto-clean strainer control cabinet electrical schematic diagram.

Referring to Fig. 1, this device comprise the auto-clean strainer 28 that constitutes by filter 39, differential pressure signalling generator 4, two-position three way magnetic valve 3, micromotor 25 and with it with the control cabinet 29 that electrically connects (among the figure with--line is represented), with pipeline be connected (among the figure with-line represent) Pressure gauge 30, air duct (with Line is represented), oil-piping (representing) with-line.In air duct, also be provided with water knockout drum 32, pressure-reducing valve 31, check valve 36 and can be throttle pipe, restricting orifice or other throttling facilities by being provided with blowdown control valve 35, throttle part 38, throttle part in the blowdown control valve 35 of gas circuit interlocking, washing control valve 37, the blowdown oil-piping, this example is a restricting orifice, the diameter of orifice plate is according to metered flow, and the blowdown leak volume of rated operating pressure and permission is determined.Fig. 2 showed the structure of auto-clean strainer 28 and has been connected to each other relation, wherein: the last sealing ring of 1-, 2-carriage, the 3-two-position three way magnetic valve, 4-differential pressure signalling generator, 5-lower seal, the 6-lower clamping ring, 7-rolling bearing, 8-garden awl lock, the 9-blow-off pipe, 10-filter housing, 11-cover plate, 12-filter screen group, 13-spray orifice, 14-filter core coating body, 15-filter core body, 16-sludge collecting shell, 17-axle, the last trim ring of 18-, 19-pinion, 20-turbine and worm assembly, 21, the 22-rolling bearing, the 23-shaft coupling, 24-cross piece, 25-micromotor, the 26-gear wheel, 27-filter upper cover plate.Upper and lower sealing ring 1,5 is contained in the annular seal groove of filter housing 10 upper and lower end inboards, makes to become the sealing ring sealing by traditional clearance seal between filter housing 10 and the filter core, in order to avoid unfiltered oil leaks into the oil that has filtered, has improved filtering accuracy.Filter core be provided with the filter core body 15 of a groove by outer surface and be rolled in the body appearance and be embedded in filter screen group 12 in the body recess and topped coating body 14 behind the mutual edging in two limits in filter screen group 12 outsides, upper and lower trim ring 18,6 constitutes; Filter screen group 12 is thin stainless steel cloth by the intermediate layer, and inside and outside is that thick stainless steel cloth is formed; Micromotor 25 drives filter core by the reduction gearing mechanism that is made of large and small gear 26,19, cross piece 24, shaft coupling 23 and the worm gear pole 20 etc. that are contained in filter upper cover plate 27 and rotates around axle 17; On filter housing 10, have one group of spray orifice 13 of aiming at sludge collecting shell 16, sludge collecting shell 16 is positioned on the housing by garden awl lock 8, compressed air washes away filter screen group 12 at a high speed through spray orifice 13, dirt is integrated in the chamber of sludge collecting shell 16 and gathers, and is discharged to the sump oil case 34 that is provided with fluid level controller 33 by blow-off pipe 9 input blow-off lines.Also be provided with cover plate 11 and the carriage 2 that prevents that flushing out air from leaking in housing 10 outsides.

The operation principle of present embodiment is roughly as follows: the compressed air that is come by air bottle is divided into two the tunnel, one the tunnel through the two-position three way magnetic valve 3 that reduces pressure, one the road to washing control valve 37, when machine run after a period of time, the mechanical admixture that accumulates in filter screen group 12 inwalls increases, and filter turnover oil pipe pressure reduction rises.Go up in limited time when reaching setting value, differential pressure signalling generator 4 closures, send electric signal, make micromotor 25 drive the filter core revolution, two-position three way magnetic valve 3 actions by control cabinet 29, after moving certain distance on blowdown control valve 35 pistons, the gas circuit of leading to washing control valve 37 on the cylinder is opened, and moves on washing control valve 37 pistons, and flushing valve is opened, compressed air enters, flushing filter screen group.When filter core returns when turning around, by time relay control, stop flushing and blowdown automatically, control valve 35,37 is closed under spring action automatically, after the flushing, differential pressure drops to below the setting value, and flushing finishes, if differential pressure does not drop to below the setting value, then repeat said process, realize automatic cleaning function.

Present embodiment removes and realizes cleaning automatically in actual use, by change-over switch, can also realize manual cleaning.

Fig. 3 provides a kind of electrical schematic diagram of control cabinet in the present embodiment, is not unfeasible to those skilled in the art, at this, does not give unnecessary details.

Claims (3)

1, a kind of auto-clean strainer device, comprise by filter 39, auto-clean strainer 28 that differential pressure signalling generator 4, two-position three way magnetic valve 3, micromotor 25 constitute and the control cabinet 29 that is electrically connected with it, the Pressure gauge that pipeline connects, and air duct, oil-pipings etc. partly, it is characterized in that blowdown control valve 35 and 37 interlockings of the flushing chamber system valve in the air duct in the blow-off line, guarantee to open blowdown control valve 35 earlier by interlocking, open washing control valve again and wash with the air of suitable pressure; Installing throttle part 38 in the drain outlet; The upper and lower side madial wall of filter housing 10 is equipped with sealing ring 1,5.

2, device as claimed in claim 1 is characterized in that washing control valve 37 and blowdown control valve 35 are with gas circuit or circuit interlocking;

3, device as claimed in claim 1, it is characterized in that in the drain outlet installing throttle part be restricting orifice or throttle pipe.

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