CN203809426U - Return filter - Google Patents
Return filter Download PDFInfo
- Publication number
- CN203809426U CN203809426U CN201420128709.5U CN201420128709U CN203809426U CN 203809426 U CN203809426 U CN 203809426U CN 201420128709 U CN201420128709 U CN 201420128709U CN 203809426 U CN203809426 U CN 203809426U
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- China
- Prior art keywords
- filter
- cover
- pass valve
- return
- exoskeletal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a return filter. The return filter comprises a filter cover, a filter head and a filter cylinder; the filter head is located between the filter cover and the filter cylinder; a frameless filter element is arranged under the inner wall of the filter cylinder; the upper end of the frameless filter element is provided with a bypass valve; the center of the bypass valve and the frameless filter element is provided with a magnetic rod; the bottom of the magnetic rod extends to the lower middle portion of the frameless filter element. According to the return filter, the structural design is skillful, the economic efficiency is improved, and the environment-friendly effect is strengthened and pollutants blocked inside the filter element cannot flow back to a container when filter element replacement and bypass valve overflowing are performed on the fluid and accordingly the service life of the device is improved.
Description
Technical field
The utility model belongs to art of filters, specifically, is about a kind of return filter.
Background technique
In hydraulic equipment and hydraulic system, the pure degree of fluid all has important impact for functional reliability and the life-span of hydraulic equipment.Therefore keep the cleaning of fluid and improve the pollution situation of fluid, extremely important for hydraulic system.At present, in Fluid-transmission or transmitting procedure, return filter is often installed, for the pollutant of filtering fluid, the fluid that makes to flow back in container keeps 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, flow trace when small arrow represents the rear fluid of filter core obstruction 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 to be flowed to inside by filter core outside, more in renew cartridge process, there iing a serious problem, after filter core is drawn out of, the oil not being filtered and the pollutant that are deposited between filter material 2 and filter cylinder 1 inevitably come 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 by Reusability, inner frame 3 and bypass valve 4 can Reusabilities, because existing filter material 2, inner frame 3 and bypass valve 4 are fixed together, so more during renew cartridge, inner frame 3 and bypass valve 4 are replaced in the lump, caused the waste of resource, also increased user cost, and this filter core being replaced is processed and recycling difficulty is large, not environmental protection 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 described bypass valve 5 is located at the lower end of filter core.Although described fluid be by filter core inside to outer flow,, because described bypass valve 5 is located at the lower end of filter core, so when bypass valve 5 was opened oil, the pollutant that filter core inside is blocked is got back to again fuel tank.Therefore not only economy, environmental protection not of this return filter, and filter element replacing and bypass valve are while crossing oil, all can make the pollutant that is deposited in the dirty oil of filter core inside and is blocked come back in fuel tank, severe contamination fluid.
In addition, in hydraulic system, in fluid, also there is a large amount of metal granule, if do not processed, by increasing filter core, receive dirty burden, shorten the working life of filter core, for this reason, existing reflux and filter often adopts an additional magnetic filter, filters the metal granule being produced by component abrasion, and it takes up room greatly, cost is high.
Therefore, in the process of renew cartridge more, fluid is heavily polluted and the problem of economic not environmental protection has to be solved.
Model utility content
The purpose of this utility model is to provide a kind of return filter, to solve the economic not environmental protection of existing return filter and fluid is heavily polluted in the process of renew cartridge more problem.
For achieving the above object, the utility model is by the following technical solutions:
A kind of return filter, comprise filter cover, filter and filter cylinder, wherein, described filter is between described filter cover and filter cylinder, the inwall below of described filter cylinder is provided with exoskeletal filter core, the upper end of described exoskeletal filter core is provided with a bypass valve, and the center of described bypass valve and exoskeletal filter core is provided with a bar magnet, and the bottom of described bar magnet extends the middle and lower part of exoskeletal filter core.
According to the utility model, described bypass valve comprises a supporting frame, one circlip, one by-pass valve body, one 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 the inwall top 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 utility model, support frame as described above is by annulus on, the one piece casting that three inclined struts between lower annulus and upper annulus and lower annulus form, the center of described upper annulus is provided with a through hole, one stay bolt is successively through described through hole, bar magnet and a nut and a wing nut are fixed on bar magnet the central position of bypass valve and exoskeletal filter core, and bar magnet is fixed between the upper annulus and nut of supporting frame, described wing nut is placed in the bottom of filter cylinder, between the upper annulus of described filter cover and supporting frame, be provided with a holddown spring, described lower annulus is provided with some small through hole, flowing hole when described small through hole is bypass valve bypass, the center of described lower annulus is also provided with a large through-hole, by-pass valve body links together through large through-hole the lower annulus by circlip and supporting frame.
According to the utility model, the top of described filter cover is provided with a detector.
According to the utility model, described filter cover and filter are fixed together by four bolts, are equipped with O type circle between described filter cover and filter cylinder and filter.
Further, described bar magnet is comprised of some permanent magnets.
Further, described detector is pressure gauge or signal-transmitting machine.
Return filter of the present utility model, 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 skeleton is not set on filter core, during replacing, does not need to change with filter core simultaneously, solved frame of filter element and the frequent problem of changing of bypass valve of existing filter.Therefore more environmental protection is more economical, to process discarded filter core;
(2) compare with other filters, this filter core has reduced this part of skeleton, saved the space between filter core and filter cylinder, save material, structure is terse, make filter in diametric(al) than the smaller and more exquisite economy of other filter of equal flow, simultaneously filter core part is few, simple in structure, more convenient when changing and installing;
2, because fluid is to flows outside by filter core inside, 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 all the time and the downstream of return filter connects, and inner pollutant and the residual fluid of filtered with filter core out, can not flow back to container again, the turbidity test of assurance system can, by the pollutant recontamination of filtering, not improve the working life of equipment;
3, bypass valve of the present utility model is arranged on the upper end of filter core, and the pollutant that is intercepted at filter core inside during bypass valve overcurrent can not flow back to container;
4, its reasonable in design, powerful, central authorities at filter cylinder are provided with bar magnet, the entrance that neither fluid can be entered to filter cylinder stops up, most metal granule in again can fluid-absorbent, has reduced filter core and has received dirty burden, compares with other return filter, greatly extend the life-span of filter core, also save in system and configure in addition magnetic filter.
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 return filter of the present utility model.
Embodiment
Below in conjunction with concrete accompanying drawing, return filter of the present utility model is described in further detail.
As shown in Figure 3, for return filter of the present utility model, comprise filter cover 14, filter 21 and filter cylinder 11, wherein, described filter 21 is between described filter cover 14 and filter cylinder 11, and the inwall of described filter cylinder 11 below is provided with exoskeletal filter core 12, and the upper end of described exoskeletal filter core 12 is provided with a bypass valve, described bypass valve and exoskeletal filter core 12 center are provided with a bar magnet 23, and the bottom of described bar magnet 23 extends the middle and lower part of exoskeletal filter core 12.
Described bypass valve comprises a supporting frame 16, one circlip 24, one by-pass valve body 19, one by-pass valve cover 18 and a case of by-pass valve 10, support frame as described above 16 is located in filter 21, described by-pass valve cover 18 and by-pass valve body 19 are located at the inwall top of filter cylinder 11, and described case of by-pass valve 10 is located between by-pass valve cover 18 and by-pass valve body 19.
Support frame as described above 16 is by annulus 25 on, the one piece casting that three inclined struts 26 between lower annulus 29 and upper annulus 25 and lower annulus 29 form, described upper annulus 25 center is provided with a through hole 9, one stay bolt 22 is successively through described through hole 9, bar magnet 23 and a nut 28 and a wing nut 13 are fixed on bar magnet 23 central position of bypass valve and exoskeletal filter core 12, and bar magnet 23 is fixed between the upper annulus 25 and nut 28 of supporting frame 16, described wing nut 13 is placed in the bottom of filter cylinder 11, between described filter cover 14 and the upper annulus 25 of supporting frame 16, be provided with a holddown spring 15, described lower annulus 29 is provided with some small through hole 30, flowing hole when described small through hole 30 is bypass valve bypass, described lower annulus 29 center is also provided with a large through-hole, by-pass valve body 19 links together through large through-hole and by circlip 24 and the lower annulus of supporting frame 16.
The top of described filter cover 14 is provided with a detector 20.
Described filter cover 14 and filter 21 are fixed together by four bolts 27, are equipped with O type circle 8 between described filter cover 14 and filter cylinder 11 and filter 21.
Described bar magnet 23 is comprised of some permanent magnets, can increase or reduce according to actual conditions the quantity of permanent magnet.
Described detector 20 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 12 filters; Flow trace when the large arrow in figure represents fluid through exoskeletal filter core 12 filtration, the flow trace of fluid when small arrow represents bypass valve overcurrent.Therefore, as can be seen from Figure 3, fluid of the present utility model is to flows outside by the inside of exoskeletal filter core 12.
In Fluid-transmission or transmitting procedure, return filter of the present utility model filters fluid and comprises the following steps:
Step 1: fluid enters filter 21 from filter 21 openings, and flow downward and enter the inner chamber of exoskeletal filter core 12 along the endoporus 31 of by-pass valve body 19, most of metal granule in this process medium fluid is adsorbed by bar magnet 23, has completed first of fluid and has heavily purified;
Step 2: fluid enters the inner chamber of exoskeletal filter core 12, by the filtration of exoskeletal filter core 12, finally, through the hole on filter cylinder 11, enters in container.
When exoskeletal filter core 12 stops up, when pressure is elevated to the setting value of detector 20, do not change in time exoskeletal filter core 12, pressure continues to raise, while reaching the pressure maximum that case of by-pass valve 10 bears, by-pass valve cover 18 pressure-bearings are descending and compress case of by-pass valve 10, and by-pass valve cover 18 and supporting frame 16 are opened near the sealing surface forming, fluid flows between by-pass valve body 19 and filter cylinder 11, and flows into container through the hole on filter cylinder 11.Due to the upper end of bypass valve at exoskeletal filter core 12, by the fluid of bypass valve, can not bring the pollutant in exoskeletal filter core 12 inner chambers into container.
When the contaminated thing of exoskeletal filter core 12 constantly stops up, the pressure of exoskeletal filter core 12 upstreams constantly raises, and when pressure reaches the setting of signal-transmitting machine or pressure gauge and shows that pressure reaches certain value, represents that described exoskeletal filter core 12 needs to change.Now shut down, turn on bolt 27, open filter cover 14, take out holddown spring 15, then bypass valve, exoskeletal filter core 12, bar magnet 23 are proposed in the lump from filter cylinder 11.Due to fluid of the present utility model be by the inside of exoskeletal filter core 12 to flows outside, therefore, in this process, pollutant is all deposited in the inner chamber of exoskeletal filter core 12 all the time.In exoskeletal filter core 12 inner chambers, the fluid of filtered and pollutant are taken out of completely with exoskeletal filter core 12, can again not flow back to container.If also have remaining fluid in exoskeletal filter core 12, can first fluid be poured in other container, turn on afterwards wing nut 13, exoskeletal filter core 12 is pulled up, simultaneously, can clear up bar magnet 23, more exoskeletal new filter core 12 be installed to the wing nut 13 of screwing on, then bypass valve etc. is inserted to filter cylinder 11 together with exoskeletal filter core 12, press holddown spring 15, cover filter cover 14, tight a bolt 27.
Claims (7)
1. return filter, comprise filter cover, filter and filter cylinder, it is characterized in that, described filter is between described filter cover and filter cylinder, the inwall below of described filter cylinder is provided with exoskeletal filter core, the upper end of described exoskeletal filter core is provided with a bypass valve, and the center of described bypass valve and exoskeletal filter core is provided with a bar magnet, and the bottom of described bar magnet extends the middle and lower part of exoskeletal filter core.
2. return filter as claimed in claim 1, it is characterized in that, described bypass valve comprises a supporting frame, one circlip, one 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 the inwall top of filter cylinder, and described case of by-pass valve is located between by-pass valve cover and by-pass valve body.
3. return filter as claimed in claim 2, is characterized in that, support frame as described above is by three one piece castings that inclined strut forms between annulus, lower annulus and upper annulus and lower annulus on,
The center of described upper annulus is provided with a through hole, one stay bolt is fixed on bar magnet the central position of bypass valve and exoskeletal filter core through described through hole, bar magnet and a nut and a wing nut successively, and bar magnet is fixed between the upper annulus and nut of supporting frame, described wing nut is placed in the bottom of filter cylinder, between the upper annulus of described filter cover and supporting frame, be provided with a holddown spring
Described lower annulus is provided with some small through hole, flowing hole when described small through hole is bypass valve bypass, and the center of described lower annulus is also provided with a large through-hole, and by-pass valve body links together through large through-hole the lower annulus by circlip and supporting frame.
4. return filter as claimed in claim 1, is characterized in that, the top of described filter cover is provided with a detector.
5. return filter as claimed in claim 1, is characterized in that, described filter cover and filter are fixed together by four bolts, is equipped with O type circle between described filter cover and filter cylinder and filter.
6. return filter as claimed in claim 1, is characterized in that, described bar magnet is comprised of some permanent magnets.
7. return filter as claimed in claim 4, is characterized in that, described detector is pressure gauge or signal-transmitting machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128709.5U CN203809426U (en) | 2014-03-20 | 2014-03-20 | Return filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128709.5U CN203809426U (en) | 2014-03-20 | 2014-03-20 | Return filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809426U true CN203809426U (en) | 2014-09-03 |
Family
ID=51448183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420128709.5U Withdrawn - After Issue CN203809426U (en) | 2014-03-20 | 2014-03-20 | Return filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809426U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867537A (en) * | 2014-03-20 | 2014-06-18 | 上海朗境流体技术有限公司 | Return filter and method of filtering fluid by using return filter |
| CN107763001A (en) * | 2017-09-28 | 2018-03-06 | 西南石油大学 | A kind of double oil cylinder hydraulic control by-passing valves for wiper |
-
2014
- 2014-03-20 CN CN201420128709.5U patent/CN203809426U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103867537A (en) * | 2014-03-20 | 2014-06-18 | 上海朗境流体技术有限公司 | Return filter and method of filtering fluid by using return filter |
| CN107763001A (en) * | 2017-09-28 | 2018-03-06 | 西南石油大学 | A kind of double oil cylinder hydraulic control by-passing valves for wiper |
| CN107763001B (en) * | 2017-09-28 | 2019-04-16 | 西南石油大学 | A kind of double oil cylinder hydraulic control by-passing valves for pipe cleaner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140903 Effective date of abandoning: 20160817 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |