CN105298994A - Improved return filter and fluid filtering method thereof - Google Patents
Improved return filter and fluid filtering method thereof Download PDFInfo
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- CN105298994A CN105298994A CN201410258153.6A CN201410258153A CN105298994A CN 105298994 A CN105298994 A CN 105298994A CN 201410258153 A CN201410258153 A CN 201410258153A CN 105298994 A CN105298994 A CN 105298994A
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- filter
- pass valve
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- filter core
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Abstract
The invention relates to an improved return filter and a fluid filtering method thereof. The improved return filter comprises a filter cover, a filter head and a filter barrel. The filter head is located between the filter cover and the filter barrel. A frame-free filter element is arranged at the lower portion of the inner wall of the filter barrel. A bypass valve is arranged at the upper end of the frame-free filter element. A magnetic rod is arranged in the center of the frame-free filter element. The bottom of the magnetic rod extends to the middle lower portion of the frame-free filter element. In the use process, fluid enters into the filter head through an opening of the filter head and flows downwards along an inner cavity of a bypass valve body into an inner cavity of the frame-free filter element, most metal particles in the fluid are adsorbed through the magnetic rod, and therefore the fluid is purified for the first time; and then the fluid is filtered through the frame-free filter element, penetrates holes in the filter barrel finally and enters a container. The improved return filter has the beneficial effects that the structure is designed ingeniously, economic efficiency is improved, and the environmental friendliness effect is enhanced; and in the filter element replacement process and the bypass valve flow passing process, pollutants contained in the fluid and intercepted in the filter element cannot flow back to the container, and the service life of the improved return filter is prolonged.
Description
Technical field
The invention belongs to art of filters, specifically, be about a kind of improvement return filter and filter the method for fluid.
Background technique
In hydraulic equipment and hydraulic system, the clean level of fluid all has important impact for the functional reliability of hydraulic equipment and life-span.Therefore keep the cleaning of fluid and improve the pollution situation of fluid, for extremely important hydraulic system.At present, in Fluid-transmission or transmitting procedure, often return filter is installed, for the pollutant in filtering fluid, makes the fluid flowed back in container keep clean.
Existing return filter, mainly contains two kinds, respectively as depicted in figs. 1 and 2.Filled arrows in figure represents the oil of filtered, the oil of hollow arrow representative after filter element filtering; Large arrow in figure represents the flow trace of fluid when filter core normal filtration, and small arrow represents the flow trace of the rear fluid of filter core blocking through bypass valve.
As shown in Figure 1, be existing a kind of return filter, comprise filter core and filter cylinder 1, described filter core comprises filter material 2, inner frame 3 and bypass valve 4.Described filter material 2, inner frame 3 and bypass valve 4 are fixed together.In running, the oil of part filtered and pollutant are deposited between filter material 2 and filter cylinder 1.This return filter, because fluid is flowed externally to inside by filter core, the problem that one serious is had in more renew cartridge process, after filter core is drawn out of, be deposited in the oil be not filtered between filter material 2 and filter cylinder 1 and pollutant inevitably comes back in fuel tank, severe contamination fluid, this all has important impact to the functional reliability of the equipment in hydraulic system and life-span.On the other hand, existing filter material 2 can not be used repeatedly, inner frame 3 and bypass valve 4 can Reusabilities, because existing filter material 2, inner frame 3 and bypass valve 4 are fixed together, thus more renew cartridge time, inner frame 3 and bypass valve 4 are replaced in the lump, cause the waste of resource, too increase user cost, and this filter core process be replaced and recycling difficulty are greatly, not environmentally simultaneously.
As shown in Figure 2, be existing another kind of return filter, comprise filter core and filter cylinder 7, described filter core is provided with bypass valve 5 and skeleton 6, and the lower end of filter core is located at by described bypass valve 5.Although described fluid is by filter core interior stream, because the lower end of filter core is located at by described bypass valve 5, so when the opened oil of bypass valve 5, the pollutant that filter core inside is blocked gets back to fuel tank again.Therefore this return filter not only economy, environmental protection not, and when oil crossed by filter element replacing and bypass valve, the dirty oil that all can make to be deposited in filter core inside and the pollutant be blocked come back in fuel tank, severe contamination fluid.
In addition, in hydraulic system, a large amount of metal granule is also there is in fluid, if do not processed, receiving dirty burden by increasing filter core, shortening the working life of filter core, for this reason, existing reflux and filter often adopts an additional magnetic filter, filters the metal granule produced by component abrasion, and it takes up room greatly, cost is high.
Therefore, in the process of more renew cartridge, fluid is heavily polluted and the problem of economic not environmental protection has to be solved.
Summary of the invention
The object of this invention is to provide a kind of return filter of improvement, to solve the economic not environmental protection of existing return filter and fluid is heavily polluted in the process of more renew cartridge problem.
For achieving the above object, the present invention is by the following technical solutions:
A kind of return filter of improvement, comprise filter cover, filter and filter cylinder, wherein, described filter is between described filter cover and filter cylinder, exoskeletal filter core is provided with below the inwall of described filter cylinder, the upper end of described exoskeletal filter core is provided with a bypass valve, the inner chamber of described bypass valve is provided with a position limit pin pull bar, the bottom of described position limit pin pull bar is provided with two position limit pins, described position limit pin one end is positioned at bypass valve, one end is positioned at the below of the upper end cap of exoskeletal filter core, the center of described exoskeletal filter core is provided with a bar magnet, the bottom of described bar magnet extends the middle and lower part of exoskeletal filter core.
According to the present invention, described bypass valve comprises a supporting frame, a by-pass valve body, a by-pass valve cover and a case of by-pass valve, support frame as described above is located in filter, and described by-pass valve cover and by-pass valve body are located at above the inwall of filter cylinder, and described case of by-pass valve is located between by-pass valve cover and by-pass valve body.
According to the present invention, support frame as described above is the one piece casting be made up of a handle and an annulus, described handle is arc, center is provided with a tapped hole, one stay bolt is successively through described tapped hole, one Returnning spring, position limit pin pull bar, one double nut, bar magnet is fixed on the central position of exoskeletal filter core by bar magnet and a double nut, and position limit pin pull bar is fixed on the central position of by-pass valve body, a holddown spring is provided with between described filter cover and the handle of supporting frame, described annulus is provided with some small through hole, flowing hole when described small through hole is bypass valve bypass, described round Ring current distribution is also provided with a large through-hole, by-pass valve body is passed large through-hole and is linked together by the annulus of a circlip and supporting frame.
According to the present invention, one end of described filter is provided with a detector.
According to the present invention, described filter cover and filter are fixed together by four bolts, described filter cover and be equipped with O type circle between filter cylinder and filter, are provided with O type circle between described exoskeletal filter core and by-pass valve body.
According to the present invention, described bar magnet is made up of some permanent magnets.
According to the present invention, described detector is pressure gauge or signal-transmitting machine.
Use the return filter of improvement of the present invention to filter a method for fluid, comprise the following steps:
Step one: fluid enters filter from filter opening, and flow downward along the inner chamber of by-pass valve body and enter the inner chamber of exoskeletal filter core, the most of metal granule in this process in fluid is adsorbed by bar magnet, and complete fluid first heavily purifies;
Step 2: fluid enters the inner chamber of exoskeletal filter core, by the filtration of exoskeletal filter core, eventually passes through the hole on filter cylinder, enters in container.
Further, when exoskeletal filter core blocks, when pressure is elevated to the setting value of detector, in time change exoskeletal filter core, pressure continues to raise, when reaching the pressure maximum that case of by-pass valve bears, by-pass valve cover pressure-bearing is descending and compress case of by-pass valve, by-pass valve cover and supporting frame are opened near the sealing surface formed, and fluid flows between by-pass valve body and filter cylinder, and flows into container through the hole on filter cylinder.Because bypass valve is in the upper end of exoskeletal filter core, the pollutant of exoskeletal filter core inner chamber can not be brought into container by the fluid of bypass valve.
The return filter of improvement of the present invention, its beneficial effect is:
1, its design is ingenious, saves material, saves space, more economical, environmental protection.Be mainly manifested in following two aspects:
(1) because bypass valve is independently arranged in return filter, and filter core does not arrange skeleton, during replacing, do not need to change with filter core simultaneously, solve the problem that the frame of filter element of existing filter and bypass valve are frequently changed.Therefore, more environmental protection is more economical for the discarded filter core of process;
(2) compared with other filters, this filter core decreases this part of skeleton, and namely save the space between filter core and filter cylinder, save material again, structure is terse, makes filter in diametric(al) economy smaller and more exquisite than other filter of equal flow.
2, because fluid is flowed by filter core interior, so the fluid of pollutant and filtered all rests on filter core inside, more during renew cartridge, described filter core and bypass valve etc. are suggested in the lump, the inner chamber of filter core does not have with the downstream of return filter through all the time, and inner pollutant and the residual fluid of filtered with filter core out, can not flow back to container again, the turbidity test of guarantee system by the pollutant recontamination of filtering, can not improve the working life of equipment.
3, bypass valve of the present invention is arranged on the upper end of filter core, and the pollutant being intercepted at filter core inside during bypass valve overcurrent can not flow back to container.
4, its reasonable in design, powerful, is provided with bar magnet in the central authorities of exoskeletal filter core, can most metal granule in fluid-absorbent, decrease filter core and receive dirty burden, compared with other return filter, greatly extend the life-span of filter core, system of also saving configures magnetic filter in addition.
5, position limit pin arrange ingenious.One is can draw filter core at more renew cartridge time limit position pin to be raised with bypass valve; Two is belows that position limit pin is located at the upper end cap of exoskeletal filter core, can prevent from making exoskeletal filter core unstable by the opposition in the export-oriented filter cylinder of filter cylinder, thus avoids filter core to come off.
Accompanying drawing explanation
Fig. 1 is the sectional view of existing return filter;
Fig. 2 is another sectional view of existing return filter;
Fig. 3 is the sectional view of the return filter of improvement of the present invention.
Embodiment
Below in conjunction with concrete accompanying drawing, the return filter of improvement of the present invention is described in further detail.
As shown in Figure 3, for the return filter of improvement of the present invention, comprise filter cover 10, filter 15 and filter cylinder 24, wherein, described filter 15 is between described filter cover 10 and filter cylinder 24, exoskeletal filter core 25 is provided with below the inwall of described filter cylinder 24, the upper end of described exoskeletal filter core 25 is provided with a bypass valve, the inner chamber of described bypass valve is provided with a position limit pin pull bar 32, the bottom of described position limit pin pull bar 32 is provided with two position limit pins 21, described position limit pin 21 one end is positioned at bypass valve, one end is positioned at the below of the upper end cap of exoskeletal filter core 25, the center of described exoskeletal filter core 25 is provided with a bar magnet 23, the bottom of described bar magnet 23 extends the middle and lower part of exoskeletal filter core 25.
Described bypass valve comprises supporting frame 28, by-pass valve body 33, by-pass valve cover 18 and a case of by-pass valve 19, support frame as described above 28 is located in filter 15, described by-pass valve cover 18 and by-pass valve body 33 are located at above the inwall of filter cylinder 24, and described case of by-pass valve 19 is located between by-pass valve cover 18 and by-pass valve body 33.
Support frame as described above 28 is the one piece casting be made up of a handle 29 and an annulus 30, described handle 29 is arc, the center of handle 29 is provided with a tapped hole 31, one stay bolt 27 is successively through described tapped hole 31, one Returnning spring 14, position limit pin pull bar 32, one double nut 22, bar magnet 23 is fixed on the central position of exoskeletal filter core 25 by bar magnet 23 and another double nut 22, and position limit pin pull bar 32 is fixed on the central position of by-pass valve body 33, a holddown spring 12 is provided with between described filter cover 10 and the handle 29 of supporting frame 28, described annulus 30 is provided with some small through hole 26, flowing hole when described small through hole 26 is bypass valve bypass, the center of described annulus 30 is also provided with a large through-hole, by-pass valve body 33 is passed large through-hole and is linked together with the annulus 30 of supporting frame 28 by a circlip 16.
One end of described filter 15 is provided with a detector 13.
Described filter cover 10 and filter 15 are fixed together by four bolts 9, described filter cover 10 and be equipped with O type circle 20 between filter cylinder 24 and filter 15, are provided with O type circle 20 between described exoskeletal filter core 25 and by-pass valve body 33.
Described bar magnet 23 is made up of some permanent magnets.
Described detector 13 is pressure gauge or signal-transmitting machine.
As shown in Figure 3, the filled arrows in figure represents the fluid of filtered, the fluid of hollow arrow representative after exoskeletal filter core 25 filters; Large arrow in figure represents the flow trace of fluid when exoskeletal filter core 25 filters, the flow trace of fluid when small arrow represents bypass valve overcurrent.Therefore, as can be seen from Figure 3, fluid of the present invention is flowed by the interior of exoskeletal filter core 25.
Use the return filter of improvement of the present invention to filter a method for fluid, comprise the following steps:
Step one: fluid enters filter from filter 15 opening, and flow downward along the inner chamber of by-pass valve body 33 and enter the inner chamber of exoskeletal filter core 25, the most of metal granule in this process in fluid is adsorbed by bar magnet 23, and complete fluid first heavily purifies;
Step 2: fluid enters the inner chamber of exoskeletal filter core 25, by the filtration of exoskeletal filter core 25, eventually passes through the hole on filter cylinder 24, enters in container.
When exoskeletal filter core 25 blocks, when pressure is elevated to the setting value of detector 13, do not change exoskeletal filter core 25 in time, pressure continues to raise, when reaching the pressure maximum that case of by-pass valve 19 bears, by-pass valve cover 18 pressure-bearing is descending and compress case of by-pass valve 19, and by-pass valve cover 18 and supporting frame 28 are opened near the sealing surface formed, fluid flows between by-pass valve body 33 and filter cylinder 24, and flows into container through the hole on filter cylinder 24.Because bypass valve is in the upper end of exoskeletal filter core 25, can not the pollutant in exoskeletal filter core 25 inner chamber be brought into container by the fluid of bypass valve.
When the contaminated thing of exoskeletal filter core 25 constantly blocks, the pressure of exoskeletal filter core 25 upstream constantly raises, and when pressure reaches the setting of signal-transmitting machine or pressure gauge display pressure reaches certain value, represents that described exoskeletal filter core 25 needs to change.Now shut down, unthread bolts 9, open filter cover 10, take out holddown spring 12, then bypass valve, exoskeletal filter core 25, bar magnet 23 are proposed in the lump from filter cylinder 24.Because fluid of the present invention is flowed by the interior of exoskeletal filter core 25, therefore, in this process, pollutant is all deposited in the inner chamber of exoskeletal filter core 25 all the time.In exoskeletal filter core 25 inner chamber, the fluid of filtered and pollutant are taken out of completely with exoskeletal filter core 25, again can not flow back to container.If also have remaining fluid in exoskeletal filter core 25, can first fluid be poured in other container, pull position limit pin pull bar 32 afterwards, in position limit pin 21 retraction by-pass valve body 33, relieve the restriction of position limit pin 21 to exoskeletal filter core 25, exoskeletal filter core 25 is pulled up, meanwhile, bar magnet 23 can be cleared up, then pull position limit pin pull bar 32, new exoskeletal filter core 25 is installed, unclamp position limit pin pull bar 32, then bypass valve etc. is inserted filter cylinder 24 together with exoskeletal filter core 25, press holddown spring 12, cover filter cover 10, tight a bolt 9.
The return filter of improvement of the present invention, its smart structural design, both improved business efficiency, strengthened environmental protection again; Fluid is when more renew cartridge and bypass valve overcurrent, and the pollutant being intercepted at filter core inside can not flow back to container, improves the working life of equipment.
Claims (9)
1. the return filter improved, comprise filter cover, filter and filter cylinder, it is characterized in that, described filter is between described filter cover and filter cylinder, exoskeletal filter core is provided with below the inwall of described filter cylinder, the upper end of described exoskeletal filter core is provided with a bypass valve, the inner chamber of described bypass valve is provided with a position limit pin pull bar, the bottom of described position limit pin pull bar is provided with two position limit pins, described position limit pin one end is positioned at bypass valve, one end is positioned at the below of the upper end cap of exoskeletal filter core, the center of described exoskeletal filter core is provided with a bar magnet, the bottom of described bar magnet extends the middle and lower part of exoskeletal filter core.
2. the return filter improved as claimed in claim 1, it is characterized in that, described bypass valve comprises a supporting frame, a by-pass valve body, a by-pass valve cover and a case of by-pass valve, support frame as described above is located in filter, described by-pass valve cover and by-pass valve body are located at above the inwall of filter cylinder, and described case of by-pass valve is located between by-pass valve cover and by-pass valve body.
3. the return filter improved as claimed in claim 2, it is characterized in that, support frame as described above is the one piece casting be made up of a handle and an annulus,
Described handle is arc, center is provided with a tapped hole, bar magnet is fixed on the central position of exoskeletal filter core by stay bolt successively through described tapped hole, a Returnning spring, position limit pin pull bar, a double nut, bar magnet and a double nut, and position limit pin pull bar is fixed on the central position of by-pass valve body, a holddown spring is provided with between described filter cover and the handle of supporting frame
Described annulus is provided with some small through hole, flowing hole when described small through hole is bypass valve bypass, and described round Ring current distribution is also provided with a large through-hole, and by-pass valve body is passed large through-hole and linked together by the annulus of a circlip and supporting frame.
4. the return filter improved as claimed in claim 1, it is characterized in that, one end of described filter is provided with a detector.
5. the return filter improved as claimed in claim 1, it is characterized in that, described filter cover and filter are fixed together by four bolts, described filter cover and be equipped with O type circle between filter cylinder and filter, are provided with O type circle between described exoskeletal filter core and by-pass valve body.
6. the return filter improved as claimed in claim 1, it is characterized in that, described bar magnet is made up of some permanent magnets.
7. the return filter improved as claimed in claim 4, it is characterized in that, described detector is pressure gauge or signal-transmitting machine.
8. use the return filter of the improvement as described in claim 1-7 to filter a method for fluid, it is characterized in that, comprise the following steps:
Step one: fluid enters filter from filter opening, and flow downward along the inner chamber of by-pass valve body and enter the inner chamber of exoskeletal filter core, the most of metal granule in this process in fluid is adsorbed by bar magnet, and complete fluid first heavily purifies;
Step 2: fluid enters the inner chamber of exoskeletal filter core, by the filtration of exoskeletal filter core, eventually passes through the hole on filter cylinder, enters in container.
9. the return filter improved as claimed in claim 8 filters the method for fluid, it is characterized in that, when exoskeletal filter core blocks, when pressure is elevated to the setting value of detector, do not change exoskeletal filter core in time, pressure continues to raise, when reaching the pressure maximum that case of by-pass valve bears, by-pass valve cover pressure-bearing is descending and compress case of by-pass valve, by-pass valve cover and supporting frame are opened near the sealing surface formed, fluid flows between by-pass valve body and filter cylinder, and flows into container through the hole on filter cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258153.6A CN105298994B (en) | 2014-06-11 | 2014-06-11 | A kind of method of improved return filter and its filtering fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410258153.6A CN105298994B (en) | 2014-06-11 | 2014-06-11 | A kind of method of improved return filter and its filtering fluid |
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| Publication Number | Publication Date |
|---|---|
| CN105298994A true CN105298994A (en) | 2016-02-03 |
| CN105298994B CN105298994B (en) | 2017-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410258153.6A Active CN105298994B (en) | 2014-06-11 | 2014-06-11 | A kind of method of improved return filter and its filtering fluid |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895046A (en) * | 2017-04-06 | 2017-06-27 | 上海朗境流体技术有限公司 | A kind of method of return filter and its filtering fluid on case |
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| CN203404172U (en) * | 2013-08-14 | 2014-01-22 | 温州市德尔油压器材厂 | Filter with safety valve |
| CN203962565U (en) * | 2014-06-11 | 2014-11-26 | 上海朗境流体技术有限公司 | A kind of improved return filter |
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- 2014-06-11 CN CN201410258153.6A patent/CN105298994B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053410A (en) * | 1975-09-10 | 1977-10-11 | Caterpillar Tractor Co. | Filter assembly with modulating bypass valve |
| CN201115800Y (en) * | 2007-08-15 | 2008-09-17 | 奇瑞汽车股份有限公司 | Normal atmosphere filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106895046A (en) * | 2017-04-06 | 2017-06-27 | 上海朗境流体技术有限公司 | A kind of method of return filter and its filtering fluid on case |
| CN106895046B (en) * | 2017-04-06 | 2018-08-31 | 上海朗境流体技术有限公司 | One plants case last time flow filter and its method for filtering fluid |
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| CN105298994B (en) | 2017-06-16 |
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