CN108079639B - Self-cleaning fuel filter with standby filter - Google Patents
Self-cleaning fuel filter with standby filter Download PDFInfo
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- CN108079639B CN108079639B CN201711343979.2A CN201711343979A CN108079639B CN 108079639 B CN108079639 B CN 108079639B CN 201711343979 A CN201711343979 A CN 201711343979A CN 108079639 B CN108079639 B CN 108079639B
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- valve
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- 238000004140 cleaning Methods 0.000 title claims abstract description 97
- 239000000446 fuel Substances 0.000 title claims abstract description 52
- 238000011010 flushing procedure Methods 0.000 claims abstract description 88
- 238000007599 discharging Methods 0.000 claims abstract description 32
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 16
- 210000001503 joint Anatomy 0.000 claims description 14
- 238000007664 blowing Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000010865 sewage Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000011086 high cleaning Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 140
- 238000000034 method Methods 0.000 description 17
- 239000000295 fuel oil Substances 0.000 description 8
- 239000012535 impurity Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
- B01D29/688—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with backwash arms or shoes acting on the cake side
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
- B01D35/1435—Filter condition indicators with alarm means
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a self-cleaning fuel filter with standby filtration, which comprises a self-cleaning filter body provided with a valve cavity with a switching valve and two filter cavities with filter cores, wherein an air inlet channel and a sewage drainage channel are arranged in the self-cleaning filter body; the switching valve is internally provided with a back flushing cavity channel, a lower air hole and two upper air holes which are communicated with the back flushing cavity channel, the switching valve and the inner wall of the valve cavity form an oil inlet cavity channel, a sewage discharging cavity and an oil outlet cavity channel, after each switching of the switching valve, the oil inlet cavity channel only communicates the front oil inlet channel with the rear oil inlet channel communicated with one filter cavity, the oil outlet cavity channel only communicates the front oil outlet channel with the rear oil outlet channel communicated with the filter cavity, one upper air hole is communicated with the air inlet channel, the other upper air hole is sealed, the lower air hole is communicated with the rear oil outlet channel communicated with the other filter cavity, and the sewage discharging cavity channel is simultaneously communicated with the sewage discharging channel and the rear oil inlet channel communicated with the filter cavity; the front end of the self-cleaning filter body is provided with a bypass filter assembly. The invention has the advantages of low energy consumption, high cleaning efficiency and good cleaning effect.
Description
Technical Field
The invention relates to the technical field of fuel filtering equipment, in particular to a self-cleaning fuel filter with standby filtering.
Background
At present, for filtering fuel, the existing common fuel filter has no automatic cleaning function. When the filter element is blocked by impurity particles in oil liquid to influence the filtering effect after the fuel filter works for a period of time, the filter element of the fuel filter needs to be cleaned; the currently adopted filter element cleaning method is as follows: firstly stopping the equipment, then taking the filter element out of the oil filter for cleaning, and reloading the filter element into the oil filter after the cleaning is finished. Therefore, there is a need to provide a fuel filter which can automatically clean the filter element on line intermittently with low energy consumption, has high cleaning efficiency and good cleaning effect.
Disclosure of Invention
The invention aims to provide a self-cleaning fuel filter with standby filtration, which has the advantages of low energy consumption, high cleaning efficiency and good cleaning effect, and can automatically clean a filter element on line intermittently.
In order to achieve the above purpose, the invention adopts the following technical scheme: the self-cleaning fuel filter with the standby filtration comprises a self-cleaning filter body, wherein an oil inlet is formed in the upper part of the front side wall of the self-cleaning filter body, an oil outlet is formed in the lower part of the front side wall of the self-cleaning filter body, a back flushing air inlet is formed in the upper part of the rear side wall of the self-cleaning filter body, a back flushing assembly for blowing high-pressure air to the back flushing air inlet is arranged at the back flushing air inlet, a valve cavity and two filter cavities which are independent and side by side from front to back are sequentially formed in the self-cleaning filter body, the inside of each filter cavity is divided into an upper filter cavity and a lower filter cavity by a partition plate, a plurality of through holes which are used for communicating the upper filter cavity with the lower filter cavity are respectively formed in the partition plate of each filter cavity, filter elements which are positioned in the corresponding upper filter cavity are respectively arranged in the through holes of the partition plate of each filter cavity, each upper filter cavity is respectively communicated with the upper space of the valve cavity through a back oil inlet channel, the upper space of the valve cavity is communicated with the back flushing air inlet through the front oil inlet, each lower filter cavity is respectively communicated with the back flushing air inlet through the front oil inlet, and the upper filter cavity are respectively communicated with the back flushing air inlet through the front oil inlet and the upper space; a conversion valve which is driven by a pneumatic motor assembly to rotate and change is movably and hermetically arranged in a valve cavity, a back flushing cavity channel is axially arranged in the center of the conversion valve, two upper air holes which are simultaneously communicated with the back flushing cavity channel are radially arranged on the side wall of the upper part of the conversion valve, when the conversion valve changes direction, the two upper air holes can be alternately communicated with an air inlet channel, an oil inlet notch is arranged on the side wall of one side of the upper part of the conversion valve, the oil inlet notch and the inner wall of the valve cavity form an independent oil inlet cavity channel, a drain notch is arranged on the side wall of the other side of the upper part of the conversion valve, the drain notch and the inner wall of the valve cavity form an independent oil outlet cavity channel, the side wall of the lower part of the conversion valve on the same side as the oil inlet notch is provided with a lower air hole which can be communicated with the back flushing cavity channel, the conversion valve is directly communicated with the back oil inlet channel and the air inlet channel only after being driven by the pneumatic motor assembly each time, the oil inlet notch and the inner wall of the valve cavity channel are directly communicated with one air inlet channel and the other air hole which are directly communicated with the back oil inlet channel and the other air cavity channel which are directly communicated with the other air inlet channel and the air inlet channel which is directly communicated with the other air inlet channel and the air outlet channel which is directly communicated with the back air inlet channel and the air cavity; a bypass filter assembly is also arranged at the front end of the self-cleaning filter body.
Further, the aforementioned self-cleaning fuel filter with backup filtration, wherein: the bypass filter assembly has the structure that: comprises a bypass filter body, a bypass filter cavity and a bypass valve cavity are arranged in the bypass filter body from front to back, an upper bypass filter cavity and a lower bypass filter cavity are separated by a bypass partition plate in the bypass valve cavity, through holes which are communicated with the upper bypass filter cavity and the lower bypass filter cavity up and down are arranged on the bypass partition plate, a bypass filter element positioned in the upper bypass filter cavity is arranged at the through holes, a first feeding port is arranged at the upper part of the right side wall of the bypass filter body, a first discharging port is arranged at the lower part of the right side wall of the bypass filter body, a second feeding port which is communicated with an oil inlet of the self-cleaning filter body in a butt joint way is arranged at the upper part of the rear side wall of the bypass filter body, a second discharging port which is communicated with an oil outlet of the self-cleaning filter body in a butt joint way is arranged at the lower part of the bypass filter body, the bypass filter body is internally provided with a first feeding channel used for communicating the first feeding port and the upper space of the bypass valve cavity, a second feeding channel used for communicating the second feeding port and the upper space of the bypass valve cavity, a third feeding channel used for communicating the upper bypass filter cavity and the upper space of the bypass valve cavity, a first discharging channel used for communicating the first discharging port and the lower space of the bypass valve cavity, a second discharging channel used for communicating the second discharging port and the lower space of the bypass valve cavity and a third discharging channel used for communicating the lower bypass filter cavity and the lower space of the bypass valve cavity; the bypass valve cavity is internally provided with a bypass switching valve driven by a driving mechanism to rotate and change direction, the upper part of the bypass switching valve is provided with an upper bypass cavity channel penetrating through the bypass switching valve, and the lower part of the bypass switching valve is provided with a lower bypass cavity channel penetrating through the bypass switching valve, so that after the bypass switching valve is driven by the driving mechanism to change direction each time, a first feeding channel on a bypass filter body is only communicated with a second feeding channel through the upper bypass cavity channel and a first discharging channel is only communicated with the second discharging channel through the lower bypass cavity channel, or the first feeding channel is only communicated with a third feeding channel through the upper bypass valve cavity and the first discharging channel is only communicated with the third discharging channel through the lower bypass valve cavity.
Further, the aforementioned self-cleaning fuel filter with backup filtration, wherein: the side surface of the bypass filter body is also provided with a pressure balancing device for balancing the internal pressure of the self-cleaning filter body and the bypass filter body when the bypass switching valve is switched.
Further, the aforementioned self-cleaning fuel filter with backup filtration, wherein: the bypass filter body is also provided with a heating device which can heat the medium entering the bypass filter body.
Further, the aforementioned self-cleaning fuel filter with backup filtration, wherein: the self-cleaning filter comprises a self-cleaning filter body, wherein a differential pressure alarm used for detecting the differential pressure between an oil inlet and an oil outlet is arranged on the self-cleaning filter body, the differential pressure alarm is in signal connection with a pneumatic motor component, the pneumatic motor component is in signal connection with an air bag back flushing component, when the differential pressure alarm detects that the differential pressure between the oil inlet and the oil outlet is larger than a preset safety differential pressure, the differential pressure alarm sends an alarm signal to the pneumatic motor component, the pneumatic motor component can control a switching valve to switch after receiving the alarm signal, and when the switching valve switches in place, the pneumatic motor component can control the switching valve to stop and send back flushing signals to the air bag back flushing component, and after receiving the back flushing signals, the air bag back flushing component can blow high-pressure air to a back flushing air inlet according to preset time.
Further, the aforementioned self-cleaning fuel filter with backup filtration, wherein: the air bag back flushing assembly comprises an air bag and a back flushing valve for controlling the opening and closing of the air bag; the air motor assembly includes: the automatic filter comprises a rotating shaft, a pneumatic motor, an electromagnetic valve, a cam, a limit switch, a recoil valve and an electromagnetic valve, wherein the rotating shaft is coaxially and fixedly connected with a switching valve, the upper end of the rotating shaft extends upwards out of a self-cleaning filter body, the pneumatic motor is used for driving the rotating shaft to rotate, the electromagnetic valve is used for controlling the pneumatic motor and is connected with a pressure difference alarm through signals, the cam is arranged on the shaft body at the upper end of the rotating shaft, and the limit switch is arranged at the top of the self-cleaning filter body, can be matched with the cam and is connected with the recoil valve and the electromagnetic valve through signals; when the electromagnetic valve receives an alarm signal sent by the pressure difference alarm, the switching valve is controlled to switch, and when the switching valve is switched to the proper position, the cam on the shaft body of the rotating shaft triggers the limit switch, the limit switch and the cam trigger the electromagnetic valve to send a switching signal to the electromagnetic valve and a back flushing signal to the back flushing valve, the electromagnetic valve stops the switching valve after receiving the switching signal, and the back flushing valve opens the air bag for a certain time after receiving the back flushing signal to realize back flushing cleaning.
Further, the aforementioned self-cleaning fuel filter with backup filtration, wherein: a drain valve is arranged at the back flushing drain outlet.
Through implementation of the technical scheme, the invention has the beneficial effects that: the operation and the use are convenient, the energy consumption is low, the filter element can be automatically cleaned in an online intermittent mode, the cleaning efficiency is high, and the cleaning effect is good.
Drawings
Fig. 1 is a schematic view of a self-cleaning fuel filter with backup filtration according to the present invention.
Fig. 2 is a schematic diagram of the structure in the plan view of fig. 1.
Fig. 3 is a schematic diagram of the structure in the right view direction of fig. 1.
Fig. 4 is an enlarged schematic view of the H site shown in fig. 3.
Fig. 5 is a schematic view of the structure of the section B-B shown in fig. 1.
Fig. 6 is a schematic view of the structure of the self-cleaning filter body shown in fig. 1.
Fig. 7 is a schematic view of the structure of section A-A shown in fig. 6.
Fig. 8 is a schematic view of the cartridge shown in fig. l.
Fig. 9 is a schematic perspective view of fig. 8.
Fig. 10 is a schematic structural view of the E-E section shown in fig. 8.
Fig. 11 is a schematic diagram of the valve cavity and the positional relationship between the filter cavities in the self-cleaning filter body shown in fig. 1.
Fig. 12 is a schematic structural view of the C-C section shown in fig. 11.
Fig. 13 is a schematic structural view of the J-J section shown in fig. 11.
Fig. 14 is a schematic structural view of the Q-Q section shown in fig. 11.
Fig. 15 is a schematic structural view of the M-M section shown in fig. 11.
FIG. 16 is a schematic view of the bypass filter assembly shown in FIG. 1.
Fig. 17 is a schematic view of the structure in the left-hand direction of fig. 16.
Fig. 18 is a schematic diagram of the structure in the plan view of fig. 16.
Fig. 19 is a schematic view of the structure of the D-D section shown in fig. 18.
Fig. 20 is a schematic structural view of the F-F section shown in fig. 18.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15, the self-cleaning fuel filter with standby filter comprises a self-cleaning filter body 1, an oil inlet 2 is arranged at the upper part of the front side wall of the self-cleaning filter body 1, an oil outlet 3 is arranged at the lower part of the front side wall of the self-cleaning filter body 1, a backflushing gas inlet 4 is arranged at the upper part of the rear side wall of the self-cleaning filter body 1, a backflushing drain 5 is arranged at the lower part of the rear side wall of the self-cleaning filter body 1, a gas bag backflushing component 6 for blowing high-pressure gas to the backflushing gas inlet 4 is arranged at the backflushing gas inlet 4, a valve cavity 7, two left filter cavities 8 and a right filter cavity 9 which are independently arranged side by side are sequentially arranged in the self-cleaning filter body 1 from front to back, the inside of the left filter cavity 8 is divided into a left upper filter cavity 81 and a left lower filter cavity 82 by a first partition board 10, a plurality of first through holes 11 which are communicated with the left upper filter cavity 81 and the left lower filter cavity 82 are respectively arranged on the first partition board 10, a first filter element 12 which is positioned in the left upper filter cavity 81 is respectively arranged at the first through holes 11, the left upper filter cavity 81 is respectively communicated with the upper space of the valve cavity 7 through a left rear oil inlet channel 13 which is arranged in the self-cleaning filter body 1, the upper space of the valve cavity 7 is communicated with the oil inlet 2 through a front oil inlet channel 14 which is arranged in the self-cleaning filter body 1, the left lower filter cavity 82 is communicated with the lower space of the valve cavity 7 through a left rear oil outlet channel 15 which is arranged in the self-cleaning filter body 1, and the lower space of the valve cavity 7 is communicated with the oil outlet 3 through a front oil outlet channel 16 which is arranged in the self-cleaning filter body 1; the inside of the right filter cavity 9 is divided into a right upper filter cavity 91 and a right lower filter cavity 92 by a second partition plate 17, a plurality of second through holes 18 which are communicated with the right upper filter cavity 91 and the right lower filter cavity 92 are respectively arranged on the second partition plate 17, a second filter element 19 which is positioned in the right upper filter cavity 91 is respectively arranged at the second through holes 18, the right upper filter cavity 91 is respectively communicated with the upper space of the valve cavity 7 through a right rear oil inlet channel 20 which is arranged in the self-cleaning filter body 1, and the right lower filter cavity 92 is respectively communicated with the lower space of the valve cavity 7 through a right rear oil outlet channel 21 which is arranged in the self-cleaning filter body 1;
an air inlet channel 22 used for communicating the backflushing air inlet 4 with the upper space of the valve cavity 7 and a sewage channel 23 used for communicating the backflushing sewage outlet 5 with the lower space of the valve cavity 7 are sequentially arranged in the self-cleaning filter body 1 between the left filter cavity 8 and the right filter cavity 9 from top to bottom; a switching valve 25 driven by a pneumatic motor assembly 24 to rotate and change is movably and hermetically arranged in the valve cavity 7, a back flushing cavity 251 is axially arranged in the center of the switching valve 25, two first upper air holes 252 and second upper air holes 253 which are simultaneously communicated with the back flushing cavity 251 are radially arranged on the side wall of the upper part of the switching valve 25, when the switching valve changes direction, the first upper air holes 252 and the second upper air holes 253 can alternately communicate with the air inlet channel 22, an oil inlet notch 254 is arranged on the side wall of one side of the upper part of the switching valve 25, the oil inlet notch 254 and the inner wall of the valve cavity 7 form an independent oil inlet cavity 26, a sewage draining notch 255 and the inner wall of the valve cavity 7 form an independent sewage draining cavity 27, an oil outlet notch 256 is arranged on the side wall of the lower part of the switching valve 7 at the same side as the oil inlet notch 254, the oil outlet notch 256 and the inner wall of the valve cavity 7 form an independent oil outlet cavity 28, a lower air hole 257 which can be communicated with the back flushing cavity 251 is arranged on the side wall of the lower part of the switching valve 7 at the same side as the sewage discharging notch 255, after the switching valve 25 is driven to be switched by the pneumatic motor assembly 24 each time, the oil inlet cavity 26 just communicates with the left rear oil inlet channel 13 which is communicated with the left upper filter cavity 81 only by the front oil inlet channel 14, the oil outlet cavity 28 just communicates with the left rear oil outlet channel 15 which is communicated with the left lower filter cavity 82 only by the front oil outlet channel 16, meanwhile, the first upper air hole 252 at the left side just communicates with the air inlet channel 22 in a butt joint way, the second upper air hole 253 at the right side just is sealed by the inner wall of the valve cavity 7, and the lower air hole 257 just communicates with the right rear oil outlet channel 21 which is communicated with the right lower filter cavity 92 in a butt joint way, the blowdown cavity channel 27 is just communicated with the blowdown channel 23 and the right rear oil inlet channel 20 communicated with the right upper filter cavity 91; or the oil inlet cavity channel 26 just communicates only the front oil inlet channel 14 with the right rear oil inlet channel 21 communicated with the right upper filter cavity 91, the oil outlet cavity channel 28 just communicates only the front oil outlet channel 16 with the right rear oil outlet channel 21 communicated with the right lower filter cavity 92, meanwhile, the first upper air hole 252 positioned at the left side is just sealed by the inner wall of the valve cavity 7, the second upper air hole 253 positioned at the right side just communicates with the air inlet channel 22 just in a butt joint manner, the lower air hole 257 just communicates with the left rear oil outlet channel 15 communicated with the left lower filter cavity 82 just in a butt joint manner, and the blowdown cavity channel 27 just communicates with the blowdown channel 23 and the left rear oil inlet channel 13 communicated with the left upper filter cavity 81 just at the same time; the front end of the self-cleaning filter body is also provided with a bypass filter component used as standby filter;
in this embodiment, as shown in fig. 16, 17, 18, 19 and 20, the bypass filter assembly has the following structure: the bypass filter comprises a bypass filter body 29, wherein a bypass filter cavity and a bypass valve cavity are arranged in the bypass filter body 29 from front to back, an upper bypass filter cavity 31 and a lower bypass filter cavity 32 are separated by a bypass partition plate 30 in the bypass valve cavity, a through hole 33 for communicating the upper bypass filter cavity 31 with the lower bypass filter cavity 32 up and down is arranged on the bypass partition plate 30, a bypass filter element 34 positioned in the upper bypass filter cavity 31 is arranged at the through hole 33, a first feed port 35 is arranged at the upper part of the right side wall of the bypass filter body 29, a first discharge port 36 is arranged at the lower part of the bypass filter body, a second feed port 37 for communicating with an oil inlet 2 of the self-cleaning filter body 1 is arranged at the upper part of the rear side wall of the bypass filter body 29, a second feed port 38 for communicating with an oil outlet 3 of the self-cleaning filter body 1 is arranged at the lower part of the bypass filter body, a first feed channel 39 for communicating the first feed port 35 with an upper space of the bypass valve cavity, a second feed channel 40 for communicating the second feed port 37 with an upper space of the valve cavity, a second feed channel 40 for communicating with the upper space of the bypass valve cavity, a second feed channel 31 for communicating with the lower space of the bypass cavity is arranged at the bypass filter cavity, a second feed channel for communicating with a lower channel 42 is arranged at the bypass channel for communicating with a lower discharge channel of the bypass filter cavity 32; a bypass switching valve 46 which is driven by a driving mechanism 45 to rotate and change direction is arranged in the bypass valve cavity, an upper bypass cavity 47 which penetrates through the bypass switching valve 46 is arranged at the upper part of the bypass switching valve 46, and a lower bypass cavity 48 which penetrates through the bypass switching valve 46 is arranged at the lower part of the bypass switching valve 46, after the bypass switching valve 46 is driven by the driving mechanism to change direction each time, the bypass switching valve 46 can enable the first feeding channel 39 on the bypass filter body 29 to be communicated with the second feeding channel 40 only through the upper bypass cavity 47 and the first discharging channel 39 to be communicated with the second discharging channel 43 only through the lower bypass cavity 48, or the first feeding channel 39 is communicated with the third feeding channel 41 only through the upper bypass valve cavity 47 and the first discharging channel 42 is communicated with the third discharging channel 44 only through the lower bypass valve cavity, and the bypass filter assembly has simple structure and convenient installation and maintenance; in this embodiment, a pressure balancing device for balancing the internal pressures of the self-cleaning filter body 1 and the bypass filter body 29 when the bypass switching valve 46 is switched is further provided on the side surface of the bypass filter body 29, so that the use safety and stability of the apparatus can be further improved; in this embodiment, a heating device capable of heating the medium entering the bypass filter body 29 is further arranged on the bypass filter body 29, so that the filter can be suitable for the medium to be heated, and the application range of the device is enlarged;
in the embodiment, a differential pressure alarm 49 for detecting the differential pressure between the oil inlet 2 and the oil outlet 3 is arranged on the self-cleaning filter body 1, the differential pressure alarm 49 is in signal connection with the pneumatic motor assembly 24, the pneumatic motor assembly 24 is in signal connection with the air bag back flushing assembly 6, when the differential pressure alarm 49 detects that the differential pressure between the oil inlet 2 and the oil outlet 3 is larger than a preset safety differential pressure, the differential pressure alarm 49 sends an alarm signal to the pneumatic motor assembly 24, the pneumatic motor assembly 24 controls the switching valve 25 to switch after receiving the alarm signal, and when the switching valve 25 switches in place, the pneumatic motor assembly 24 controls the switching valve 25 to stop and sends back flushing signals to the air bag back flushing assembly 6, and the air bag back flushing assembly 6 can blow high-pressure air to a back flushing air inlet according to preset time after receiving the back flushing signals; therefore, whether the working filter cavity needs to be automatically cleaned or not can be automatically, quickly and accurately judged, the condition that the filtering efficiency of the fuel filter is reduced due to too late cleaning time of the working filter cavity is avoided, the use safety of equipment is improved, the air bag back flushing assembly stops supplying air after supplying high-pressure air for a certain time, air supply back flushing cannot be continuously carried out, online intermittent automatic cleaning is realized, and energy consumption is greatly reduced;
in this embodiment, the air bag back flushing assembly 6 includes an air bag and a back flushing valve for controlling the opening and closing of the air bag; the air motor assembly 24 includes: the automatic reversing valve comprises a rotating shaft 241 which is fixedly connected with a reversing valve 25 coaxially and the upper end of the rotating shaft 241 extends upwards to form a self-cleaning filter body 1, a pneumatic motor 242 used for driving the rotating shaft 241 to rotate, an electromagnetic valve 243 used for controlling the pneumatic motor 242 and connected with a pressure difference alarm 49, a cam 244 arranged on the shaft body at the upper end of the rotating shaft 241, and a limit switch 245 arranged on the top of the self-cleaning filter body 1 and matched with the cam 244 and connected with a backflushing valve and the electromagnetic valve signal, wherein when the electromagnetic valve 243 receives an alarm signal sent by the pressure difference alarm 49, the pneumatic motor 242 is controlled to enable the reversing valve 25 to reverse, when the reversing valve 25 is in place, the cam 244 on the shaft body of the rotating shaft 241 triggers the limit switch 245, when the limit switch 245 triggers the cam 244, a reversing signal is sent to the electromagnetic valve 243, a backflushing signal is sent to the backflushing valve, the electromagnetic valve 243 stops the reversing valve 25 after receiving the reversing signal, and the backflushing valve receives the backflushing signal, and the air bag is opened for a certain time, so that cleaning is realized, and the pneumatic motor assembly and the air bag backflushing assembly are simple in structure and convenient to install and maintain; in the present embodiment, a drain valve 50 is provided at the backwash drain 5; the method comprises the steps of carrying out a first treatment on the surface of the
The working principle of the invention is as follows:
in the working process of the fuel filter, the left filter cavity 8 and the right filter cavity 9 in the self-cleaning filter body are one filter cavity as a working filter cavity and the other filter cavity as a standby filter cavity all the time; and when the self-cleaning filter body does not have a fault, the bypass switching valve 46 in the bypass filter assembly is always in a position where the first feed channel 39 is communicated with only the second feed channel 40 through the upper bypass channel 47, and the first discharge channel 39 is communicated with only the second discharge channel 43 through the lower bypass channel 48; when the switching valve 25 rotates to the state that the oil inlet cavity channel 26 only communicates the front oil inlet channel 14 with the left rear oil inlet channel 13 communicated with the left upper filter cavity 81, the oil outlet cavity channel 28 only communicates the front oil outlet channel 16 with the left rear oil outlet channel 15 communicated with the left lower filter cavity 82, meanwhile, the first upper air hole 252 positioned at the left side just communicates with the air inlet channel 22 in a butt joint manner, the second upper air hole 253 positioned at the right side just is sealed by the inner wall of the valve cavity 7, and the lower air hole 257 just communicates with the right rear oil outlet channel 21 communicated with the right lower filter cavity 92 in a butt joint manner, the drain cavity channel 27 just communicates with the drain channel 23 and the right rear oil inlet channel 20 communicated with the right upper filter cavity 91 at the same time, and the first feed inlet 35, the first feed channel 39, the upper bypass channel 47, the second feed channel 40, the second feed inlet 37, the oil inlet 2, the front oil inlet channel 14, the oil inlet cavity channel 26, the left rear oil inlet channel 13, the left upper filter cavity 81, the first filter element 12, the first through hole 11, the left lower oil outlet channel 82, the left rear oil outlet channel 15, the first feed outlet channel 16, the first feed outlet channel 36, the first feed outlet channel 43 and the second feed outlet channel 43 are formed by the first feed outlet channel 43 and the drain channel 43; and at this time, the backflushing gas inlet 4, the gas inlet channel 22, the first upper air hole 252, the backflushing cavity channel 251, the lower air hole 257, the right lower filter cavity 92, the second through hole 18, the second filter element 19, the right upper filter cavity 91, the blowdown cavity channel 27, the blowdown channel 23 and the backflushing blowdown outlet 5 form an independent backflushing channel together; the left filter cavity 8 will now be the working filter cavity, while the right filter cavity 9 will be the spare filter cavity; then, the fuel to be cleaned is introduced from the first feed inlet 35, and enters the upper left filter cavity 81 through the first feed channel 39, the upper bypass cavity 47, the second feed channel 40, the second feed inlet 37, the oil inlet 2, the front oil inlet channel 14, the oil inlet cavity 26 and the rear left oil inlet channel 13 in sequence, and then passes through the first filter element 12, in the process that the fuel to be cleaned passes through the first filter element 12, impurities contained in the fuel to be cleaned are intercepted and filtered by the filter holes of the first filter element 12 and are attached to the outer surface of the first filter element 12, and clean fuel filtered by the first filter element 12 enters the lower left filter cavity 82 through the first through hole 11 in sequence, and then is discharged from the first fuel outlet 36 through the rear left oil outlet channel 15, the oil outlet cavity 28, the front oil outlet channel 16, the oil outlet 3, the second discharge hole, the second discharge channel 43, the lower bypass cavity 48 and the first discharge channel 42 in sequence, so as to complete the filtering process;
in the process of filtering fuel oil by taking the left filter cavity 8 as a working filter cavity, the pressure difference alarm 49 can always detect the pressure difference between the oil inlet 2 and the oil outlet 3; when the pressure difference alarm 49 detects that the pressure difference between the oil inlet 2 and the oil outlet 3 is greater than the preset safety pressure difference, the pressure difference alarm 49 sends an alarm signal to the electromagnetic valve 243 in the air motor assembly 24, the electromagnetic valve 243 controls the air motor 242 to enable the switching valve 25 to switch after receiving the alarm signal sent by the pressure difference alarm 49, when the switching valve 25 switches to the state that the oil inlet channel 26 just rotates to the state that only the front oil inlet channel 14 is communicated with the right rear oil inlet channel 21 which communicates with the right upper filter cavity 91, the oil outlet channel 28 just communicates only the front oil outlet channel 16 with the right rear oil outlet channel 21 which communicates with the right lower filter cavity 92, meanwhile, the first upper air hole 252 on the left side is just sealed by the inner wall of the valve cavity 7, the second upper air hole 253 on the right side is just in butt joint with the air inlet channel 22, when the lower air hole 257 is just in butt joint with the left rear oil outlet channel 15 communicated with the left lower filter cavity 82, the sewage cavity channel 27 is just in butt joint with the sewage cavity 23 and the left rear oil inlet channel 13 communicated with the left upper filter cavity 81, the cam 244 on the shaft body of the rotating shaft 241 triggers the limit switch 245, the limit switch 245 triggers the cam 244 to send a reversing signal to the electromagnetic valve 243, the electromagnetic valve 243 stops the switching valve 25 after receiving the reversing signal, at the moment, the first feed inlet 35, the first feed channel 39, the upper bypass channel 47, the second feed channel 40, the second feed inlet 37, the oil inlet 2, the front oil inlet channel 14, the oil inlet channel 26, the right rear oil inlet channel 20, the right upper filter cavity 91, the second filter element 19, the second through hole 18, the right lower filter cavity 92, the right rear oil outlet channel 21, the oil outlet channel 28, the front oil outlet channels 16, the oil outlet 3, the second discharge outlet 43, the lower bypass channel 48, the first discharge channel 42 and the first discharge port 36 just together form an independent filter channel; the backflushing air inlet 4, the air inlet channel 22, the second upper air hole 253, the backflushing cavity channel 251, the lower air hole 257, the left lower filter cavity 82, the first through hole 11, the first filter element 12, the left upper filter cavity 81, the blowdown cavity channel 27, the blowdown channel 23 and the backflushing blowdown outlet 5 form an independent backflushing channel together; the right filter chamber 9 will now be the working filter chamber and the left filter chamber 8 will be the spare filter chamber; at this time, the fuel to be cleaned, which is introduced from the first feed inlet 35, enters the upper right filter cavity 91 through the first feed channel 39, the upper bypass channel 47, the second feed channel 40, the second feed inlet 37, the oil inlet 2, the front oil inlet channel 14, the oil inlet cavity 26 and the rear right oil inlet channel 20 in sequence, then passes through the second filter element 19, during the process that the fuel to be cleaned passes through the second filter element 19, impurities contained in the fuel to be cleaned are intercepted and filtered by the second filter element 19 and are attached to the outer surface of the second filter element 19, and clean fuel filtered by the second filter element 19 enters the lower right filter cavity 92 through the second through hole 18 in sequence, and then sequentially passes through the rear right oil outlet channel 21, the oil outlet channel 28, the front oil outlet channel 16, the oil outlet 3, the second discharge port, the second discharge channel 43, the lower bypass channel 48 and the first discharge channel 42 and then is discharged from the first discharge port 36, thus completing the fuel filtering process;
the limit switch 245 sends a reversing signal to the electromagnetic valve 243 and simultaneously sends a back flushing signal to the back flushing valve of the air bag back flushing assembly 6, the back flushing valve opens the air bag for a certain time after receiving the back flushing signal, so that the air bag blows high-pressure air to the back flushing air inlet 4 for a certain time, the back flushing valve is automatically closed after the time is up to stop continuously blowing the high-pressure air, in the process of blowing the high-pressure air by the air bag, the high-pressure air is sequentially blown into the left lower filter cavity 82 through the back flushing air inlet 4, the air inlet channel 22, the second upper air hole 253, the back flushing cavity 251 and the lower air hole 257, so that fuel oil retained in the left lower filter cavity 82 is upwards flushed into the first filter element 12 from the first through hole 11 and outwards flushed into the left upper filter cavity 81 from the first filter element 12, and in the process of outwards flushing fuel oil from the first filter element 12 is outwards flushed away from the inside of the left upper filter cavity 81, so that the first filter element 12 is cleaned, the first filter element 12 is restored to the filter function, the fuel oil taken away from the first filter element 12 is flushed again through the back flushing cavity 23, the back flushing cavity 5 and the drain outlet 50 is discharged from the drain outlet 50;
in the process of filtering fuel oil by taking the right filter cavity 9 as a working filter cavity, the pressure difference alarm 49 can always detect the pressure difference between the oil inlet 2 and the oil outlet 3; when the pressure difference alarm 49 detects that the pressure difference between the oil inlet 2 and the oil outlet 3 is greater than the preset safety pressure difference, the pressure difference alarm 49 sends an alarm signal to the electromagnetic valve 243 in the air motor assembly 24, the electromagnetic valve 243 controls the air motor 242 to reverse the switching valve 25 after receiving the alarm signal sent by the pressure difference alarm 49, when the switching valve 25 is reversed to the oil inlet channel 26 and is rotated again until the front oil inlet channel 14 is communicated with the left rear oil inlet channel 13 which is communicated with the left upper filter cavity 81 only, the oil outlet channel 28 is rotated again until the front oil outlet channel 16 is communicated with the left rear oil outlet channel 15 which is communicated with the left lower filter cavity 82 only, the first upper air hole 252 positioned at the left side is just rotated again until the first upper air hole 253 positioned at the right side is communicated with the air inlet channel 22 in butt joint, and the second upper air hole 253 positioned at the right side is just sealed by the inner wall of the valve cavity 7 again, when the lower air hole 257 just rotates to be communicated with the right rear oil outlet channel 21 communicated with the right lower filter cavity 92 only, the sewage cavity channel 27 just and simultaneously communicates with the sewage cavity 23 and the right rear oil inlet channel 20 communicated with the right upper filter cavity 91, the cam 244 on the shaft body of the rotating shaft 241 triggers the limit switch 245, the limit switch 245 and the cam 244 trigger to send a reversing in-place signal to the electromagnetic valve 243, the electromagnetic valve 243 stops the switching valve 25 after receiving the reversing in-place signal, at the moment, the first feed port 35, the first feed channel 39, the upper bypass cavity channel 47, the second feed channel 40, the second feed port 37, the oil inlet 2, the front oil inlet channel 14, the oil inlet cavity channel 26, the left rear oil inlet channel 13, the left upper filter cavity 81, the first filter element 12, the first through hole 11, the left lower filter cavity 82, the left rear oil outlet channel 15, the oil outlet cavity 28, the front oil outlet channel 16, the oil outlet 3, the second discharge port 43, the second discharge channel 43, the lower bypass channel 48, the first outlet channel 42 and the first outlet 36 just form an independent filter channel again together; the back flushing air inlet 4, the air inlet channel 22, the first upper air hole 252, the back flushing cavity channel 251, the lower air hole 257, the right lower filter cavity 92, the second through hole 18, the second filter element 19, the right upper filter cavity 91, the sewage draining cavity channel 27, the sewage draining channel 23 and the back flushing sewage draining outlet 5 form an independent back flushing channel again together; at this time, the left filter cavity 8 is used as a working filter cavity again, and the right filter cavity 9 is used as a standby filter cavity; at this time, the fuel to be cleaned, which is introduced into the self-cleaning filter body 1 from the first feed inlet 35, enters the upper left filter cavity 81 through the first feed channel 39, the upper bypass cavity 47, the second feed channel 40, the second feed inlet 37, the oil inlet 2, the front oil inlet channel 14, the oil inlet cavity 26 and the rear left oil inlet channel 13 in sequence, then passes through the first filter element 12, during the process that the fuel to be cleaned passes through the first filter element 12, impurities contained in the fuel to be cleaned are intercepted and filtered again by the filter holes of the first filter element 12 and are attached to the outer surface of the first filter element 12, and clean fuel filtered by the first filter element 12 enters the lower left filter cavity 82 through the first through hole 11 in sequence, and then is discharged from the first discharge outlet 36 after passing through the rear left oil outlet channel 15, the oil outlet cavity 28, the front oil outlet 16, the oil outlet 3, the second discharge outlet, the second discharge channel 43, the lower bypass cavity 48 and the first discharge channel 42 in sequence, so as to complete the fuel filtering process;
the limit switch 245 sends a reversing signal to the electromagnetic valve 243 and simultaneously sends a back flushing signal to the back flushing valve of the air bag back flushing assembly 6, the back flushing valve opens the air bag for a certain time after receiving the back flushing signal, so that the air bag blows high-pressure air to the back flushing air inlet 4 for a certain time, the back flushing valve is automatically closed after the time is up to stop continuously blowing the high-pressure air, in the process of blowing the high-pressure air by the air bag, the high-pressure air is sequentially blown into the right lower filter cavity 92 through the back flushing air inlet 4, the air inlet channel 22, the first upper air hole 252, the back flushing cavity 251 and the lower air hole 257, so that fuel oil retained in the right lower filter cavity 92 is upwards flushed into the second filter element 19 from the second through hole 18 and outwards flushed into the right upper filter cavity 91 from the second filter element 19, and in the process of outwards flushing fuel oil from the second filter element 19 is outwards flushed away from the inside the right upper filter cavity 91, so that the second filter element 19 is cleaned, the second filter element 19 is restored to the filter function, the fuel oil taken away from the second filter element 19 is discharged from the drain channel 23 and the drain outlet 50 through the drain outlet 5;
the operation is repeated, so that the filter element can be automatically cleaned;
when the self-cleaning filter body 1 fails and fuel cannot be filtered continuously and maintenance is needed, the driving mechanism 45 drives the bypass switching valve 46 to switch so that the first feeding channel 39 is communicated with the third feeding channel 41 only through the upper bypass valve cavity 47, and the first discharging channel 42 is communicated with the third discharging channel 44 only through the lower bypass valve cavity, at the moment, the fuel to be cleaned, which is introduced from the first feeding port 35, cannot enter the self-cleaning filter body 1 continuously, so that maintenance work of the self-cleaning filter body 1 can be carried out; at this time, after the fuel to be cleaned is introduced from the first feed inlet 35, the fuel enters the upper bypass filter cavity 31 through the first feed channel 39, the upper bypass valve channel 47 and the third feed channel 41 in sequence, then enters the lower bypass filter cavity 32 through the through hole 33 after passing through the bypass filter element 34, in the process that the fuel to be cleaned passes through the bypass filter element 34, impurities contained in the fuel to be cleaned are intercepted and filtered by the filter holes of the bypass filter element 34 and are attached to the outer surface of the bypass filter element 34, and clean fuel filtered by the bypass filter element 34 enters the lower bypass filter cavity 32 from the inside of the bypass filter element 34 and the through hole 33 and then is discharged from the first discharge hole 36 after passing through the third discharge channel 44, the lower bypass valve cavity 48 and the first discharge channel 42 in sequence, so as to complete the fuel filtering process;
after the self-cleaning filter body 1 is subjected to fault maintenance, the driving mechanism 45 drives the bypass switching valve 46 to switch again, so that the bypass switching valve 46 is always positioned at the position that the first feeding channel 39 is communicated with the second feeding channel 40 only through the upper bypass channel 47, and the first discharging channel 39 is communicated with the second discharging channel 43 only through the lower bypass channel 48, at the moment, fuel to be cleaned, which is introduced from the first feeding port 35, can reenter the self-cleaning filter body 1 for fuel filtration, and the fuel filtration can not be continuously carried out through the bypass filter element 34 of the bypass filter body 1.
The invention has the advantages that: the operation and the use are convenient, the energy consumption is low, the filter element can be automatically cleaned in an online intermittent mode, the cleaning efficiency is high, and the cleaning effect is good.
Claims (4)
1. Self-cleaning fuel filter with standby filtration, characterized in that: the self-cleaning filter comprises a self-cleaning filter body, wherein an oil inlet is formed in the upper part of the front side wall of the self-cleaning filter body, an oil outlet is formed in the lower part of the front side wall of the self-cleaning filter body, a back flushing air inlet is formed in the upper part of the rear side wall of the self-cleaning filter body, an air bag back flushing assembly used for blowing high-pressure air to the back flushing air inlet is arranged at the back flushing air inlet, a valve cavity and two left and right independent side-by-side filter cavities are sequentially formed in the self-cleaning filter body from front to back, the inside of each filter cavity is divided into an upper filter cavity and a lower filter cavity by a partition plate, a plurality of filter elements which are communicated with the upper filter cavity and the lower filter cavity are respectively arranged on the partition plate of each filter cavity, filter elements which are positioned in the corresponding upper filter cavity are respectively arranged in the through holes of the partition plate, the upper filter cavity is respectively communicated with the upper space of the valve cavity by a back oil inlet channel, the upper space of the self-cleaning filter body is communicated with the oil inlet through the front oil inlet channel, the lower filter cavity is respectively communicated with the lower filter cavity through a back oil outlet channel, and the back flushing air inlet space which is respectively communicated with the upper space of the back flushing air cavity; a conversion valve which is driven by a pneumatic motor assembly to rotate and change is movably and hermetically arranged in a valve cavity, a back flushing cavity channel is axially arranged in the center of the conversion valve, two upper air holes which are simultaneously communicated with the back flushing cavity channel are radially arranged on the side wall of the upper part of the conversion valve, when the conversion valve changes direction, the two upper air holes can be alternately communicated with an air inlet channel, an oil inlet notch is arranged on the side wall of one side of the upper part of the conversion valve, the oil inlet notch and the inner wall of the valve cavity form an independent oil inlet cavity channel, a drain notch is arranged on the side wall of the other side of the upper part of the conversion valve, the drain notch and the inner wall of the valve cavity form an independent oil outlet cavity channel, the side wall of the lower part of the conversion valve on the same side as the oil inlet notch is provided with a lower air hole which can be communicated with the back flushing cavity channel, the conversion valve is directly communicated with the back oil inlet channel and the air inlet channel only after being driven by the pneumatic motor assembly each time, the oil inlet notch and the inner wall of the valve cavity channel are directly communicated with one air inlet channel and the other air hole which are directly communicated with the back oil inlet channel and the other air cavity channel which are directly communicated with the other air inlet channel and the air inlet channel which is directly communicated with the other air inlet channel and the air outlet channel which is directly communicated with the back air inlet channel and the air cavity; the front end of the self-cleaning filter body is also provided with a bypass filter assembly; the bypass filter assembly has the structure that: comprises a bypass filter body, a bypass filter cavity and a bypass valve cavity are arranged in the bypass filter body from front to back, an upper bypass filter cavity and a lower bypass filter cavity are separated by a bypass partition plate in the bypass valve cavity, through holes which are communicated with the upper bypass filter cavity and the lower bypass filter cavity up and down are arranged on the bypass partition plate, a bypass filter element positioned in the upper bypass filter cavity is arranged at the through holes, a first feeding port is arranged at the upper part of the right side wall of the bypass filter body, a first discharging port is arranged at the lower part of the right side wall of the bypass filter body, a second feeding port which is communicated with an oil inlet of the self-cleaning filter body in a butt joint way is arranged at the upper part of the rear side wall of the bypass filter body, a second discharging port which is communicated with an oil outlet of the self-cleaning filter body in a butt joint way is arranged at the lower part of the bypass filter body, the bypass filter body is internally provided with a first feeding channel used for communicating the first feeding port and the upper space of the bypass valve cavity, a second feeding channel used for communicating the second feeding port and the upper space of the bypass valve cavity, a third feeding channel used for communicating the upper bypass filter cavity and the upper space of the bypass valve cavity, a first discharging channel used for communicating the first discharging port and the lower space of the bypass valve cavity, a second discharging channel used for communicating the second discharging port and the lower space of the bypass valve cavity and a third discharging channel used for communicating the lower bypass filter cavity and the lower space of the bypass valve cavity; the bypass valve cavity is internally provided with a bypass switching valve driven by a driving mechanism to rotate and change direction, the upper part of the bypass switching valve is provided with an upper bypass cavity channel penetrating the bypass switching valve, the lower part of the bypass switching valve is provided with a lower bypass cavity channel penetrating the bypass switching valve, and after the bypass switching valve is driven by the driving mechanism to change direction each time, a first feeding channel on a bypass filter body is communicated with only a second feeding channel through the upper bypass cavity channel and only a second discharging channel through the lower bypass cavity channel, or the first feeding channel is communicated with only a third feeding channel through the upper bypass valve cavity and only a third discharging channel through the lower bypass valve cavity; the side surface of the bypass filter body is also provided with a pressure balancing device for balancing the internal pressure of the self-cleaning filter body and the bypass filter body when the bypass switching valve is switched; the bypass filter body is also provided with a heating device which can heat the medium entering the bypass filter body.
2. The self-cleaning fuel filter with backup filtration of claim 1, wherein: the self-cleaning filter comprises a self-cleaning filter body, wherein a differential pressure alarm used for detecting the differential pressure between an oil inlet and an oil outlet is arranged on the self-cleaning filter body, the differential pressure alarm is in signal connection with a pneumatic motor component, the pneumatic motor component is in signal connection with an air bag back flushing component, when the differential pressure alarm detects that the differential pressure between the oil inlet and the oil outlet is larger than a preset safety differential pressure, the differential pressure alarm sends an alarm signal to the pneumatic motor component, the pneumatic motor component can control a switching valve to switch after receiving the alarm signal, and when the switching valve switches in place, the pneumatic motor component can control the switching valve to stop and send back flushing signals to the air bag back flushing component, and after receiving the back flushing signals, the air bag back flushing component can blow high-pressure air to a back flushing air inlet according to preset time.
3. The self-cleaning fuel filter with backup filtration of claim 2, wherein: the air bag back flushing assembly comprises an air bag and a back flushing valve for controlling the opening and closing of the air bag; the air motor assembly includes: the automatic filter comprises a rotating shaft, a pneumatic motor, an electromagnetic valve, a cam, a limit switch, a recoil valve and an electromagnetic valve, wherein the rotating shaft is coaxially and fixedly connected with a switching valve, the upper end of the rotating shaft extends upwards out of a self-cleaning filter body, the pneumatic motor is used for driving the rotating shaft to rotate, the electromagnetic valve is used for controlling the pneumatic motor and is connected with a pressure difference alarm through signals, the cam is arranged on the shaft body at the upper end of the rotating shaft, and the limit switch is arranged at the top of the self-cleaning filter body, can be matched with the cam and is connected with the recoil valve and the electromagnetic valve through signals; when the electromagnetic valve receives an alarm signal sent by the pressure difference alarm, the switching valve is controlled to switch, and when the switching valve is switched to the proper position, the cam on the shaft body of the rotating shaft triggers the limit switch, the limit switch and the cam trigger the electromagnetic valve to send a switching signal to the electromagnetic valve and a back flushing signal to the back flushing valve, the electromagnetic valve stops the switching valve after receiving the switching signal, and the back flushing valve opens the air bag for a certain time after receiving the back flushing signal to realize back flushing cleaning.
4. The self-cleaning fuel filter with backup filtration of claim 1, wherein: a drain valve is arranged at the back flushing drain outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711343979.2A CN108079639B (en) | 2017-12-15 | 2017-12-15 | Self-cleaning fuel filter with standby filter |
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| CN201711343979.2A CN108079639B (en) | 2017-12-15 | 2017-12-15 | Self-cleaning fuel filter with standby filter |
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| CN108079639B true CN108079639B (en) | 2023-07-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108591806B (en) * | 2018-06-01 | 2023-12-22 | 中国船舶重工集团公司第七0三研究所 | Lubricating oil filter applied to gas turbine |
| CN109091930A (en) * | 2018-08-03 | 2018-12-28 | 东北石油大学 | A kind of backwash filter |
| CN109695507B (en) * | 2018-08-30 | 2021-11-05 | 中国船舶重工集团公司第七0七研究所九江分部 | Fuel oil filter applied to gas turbine |
| CN110102094A (en) * | 2019-05-21 | 2019-08-09 | 高通环保科技股份有限公司 | A kind of intelligence filter press |
| US11946439B2 (en) * | 2022-05-09 | 2024-04-02 | Caterpillar Inc. | Fuel module for engine having service valve assembly for common drain from primary and secondary filters |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009015590A1 (en) * | 2007-07-27 | 2009-02-05 | Ketao Wang | Filter |
| CN204017473U (en) * | 2014-05-07 | 2014-12-17 | 南通福通航海科技有限公司 | Self-cleaning fuel oil filter |
| CN204735006U (en) * | 2015-04-27 | 2015-11-04 | 宝钢不锈钢有限公司 | Filter is switched to pair of back flush on line |
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2017
- 2017-12-15 CN CN201711343979.2A patent/CN108079639B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009015590A1 (en) * | 2007-07-27 | 2009-02-05 | Ketao Wang | Filter |
| CN204017473U (en) * | 2014-05-07 | 2014-12-17 | 南通福通航海科技有限公司 | Self-cleaning fuel oil filter |
| CN204735006U (en) * | 2015-04-27 | 2015-11-04 | 宝钢不锈钢有限公司 | Filter is switched to pair of back flush on line |
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