CN108067026B - Self-cleaning fuel filter - Google Patents
Self-cleaning fuel filter Download PDFInfo
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- CN108067026B CN108067026B CN201711343977.3A CN201711343977A CN108067026B CN 108067026 B CN108067026 B CN 108067026B CN 201711343977 A CN201711343977 A CN 201711343977A CN 108067026 B CN108067026 B CN 108067026B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 74
- 239000000446 fuel Substances 0.000 title claims abstract description 39
- 238000011010 flushing procedure Methods 0.000 claims abstract description 78
- 239000010865 sewage Substances 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 210000001503 joint Anatomy 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 10
- 238000007664 blowing Methods 0.000 claims description 7
- 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 14
- 238000001914 filtration Methods 0.000 description 10
- 239000000295 fuel oil Substances 0.000 description 8
- 239000012535 impurity Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
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- 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
- B01D29/52—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 in parallel connection
-
- 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
- B01D29/60—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
Abstract
The invention discloses a self-cleaning fuel filter, 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 which is communicated with one filter cavity, the oil outlet cavity channel only communicates the front oil outlet channel with the rear oil outlet channel which is 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 which is 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 which is communicated with the filter cavity. The invention has the advantages of low energy consumption, on-line automatic cleaning of the filter element, 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.
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 which has low energy consumption, can automatically clean a filter element on line intermittently, and has high cleaning efficiency and good cleaning effect.
In order to achieve the above purpose, the invention adopts the following technical scheme: the self-cleaning fuel 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 backflushing gas inlet is formed in the upper part of the rear side wall of the self-cleaning filter body, a gas bag backflushing assembly used for blowing high-pressure gas to the backflushing gas inlet is arranged at the backflushing gas inlet, a valve cavity and two filter cavities which are independent and side by side are sequentially arranged 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 cores 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 cores 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 communicated with the upper space of the valve cavity by a rear oil inlet channel, each lower filter cavity is communicated with the oil inlet by the front oil inlet channel, each lower filter cavity is respectively communicated with the lower filter cavity by the front oil outlet channel, and the upper filter cavity is respectively communicated with the lower filter cavity by the front oil inlet, and the upper filter cavity is respectively communicated with the lower filter cavity by the back oil inlet; the valve cavity is movably and hermetically provided with a conversion valve driven by a pneumatic motor assembly to rotate and change direction, 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 the upper part of the conversion valve, an independent oil inlet cavity channel is formed by the oil inlet notch and the inner wall of the valve cavity, a sewage draining notch is arranged on the side wall of the other side of the upper part of the conversion valve, an independent sewage draining cavity is formed by the sewage draining notch and the inner wall of the valve cavity, an oil outlet notch is arranged on the side wall of the lower part of the conversion valve at the same side as the oil inlet notch, and an independent oil outlet cavity channel is formed by the oil outlet notch and the inner wall of the valve cavity, the lower air hole which can be communicated with the back flushing cavity channel is arranged on the side wall of the lower part of the switching valve at the same side of the sewage discharging notch, the air inlet cavity channel just communicates the front oil inlet channel with the back oil inlet channel which is correspondingly communicated with one filter cavity, the oil outlet cavity channel just communicates the front oil outlet channel with the back oil outlet channel which is correspondingly communicated with the filter cavity, meanwhile, one upper air hole is just communicated with the air inlet channel in a butt joint way, the other upper air hole is just sealed by the inner wall of the valve cavity, and the lower air hole is just communicated with the back oil outlet channel which is correspondingly communicated with the other filter cavity in a butt joint way, and the sewage discharging cavity channel is just communicated with the sewage discharging channel and the back oil inlet channel which is communicated with the filter cavity at the same time.
Further, the aforementioned self-cleaning fuel filter, 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, 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, wherein: a drain valve is arranged at the 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 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.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, fig. 13, fig. 14, fig. 15, the self-cleaning fuel 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 self-cleaning filter body 1, a recoil gas inlet 4 is arranged at the upper part of the rear side wall of the self-cleaning filter body 1, a sewage drain 5 is arranged at the lower part of the self-cleaning filter body, a gas bag back flushing component 6 for blowing high pressure gas to the recoil gas inlet 4 is arranged at the recoil gas inlet 4, a valve cavity 7, two left filter cavities 8 and right filter cavities 9 which are independently arranged from front to back in sequence are arranged in the self-cleaning filter body 1, the inside of the left filter cavity 8 is separated into an upper left filter cavity 81 and a lower left filter cavity 82 by a first partition board 10, a plurality of first through holes 11 which are communicated with the upper left filter cavity 81 and the lower filter cavity 82 are respectively arranged on the first partition board 10, a first through holes 11 which are respectively communicated with the upper left filter cavity 81 and the lower filter cavity 82 are respectively, a space 1 is arranged at the upper left filter cavity 1 and the upper left filter cavity 7 and the front filter cavity 1 and the lower filter cavity 1, a space which is communicated with the lower filter cavity 1 is communicated with the left filter cavity 1 through the left upper filter cavity 1 and the left filter cavity 1 through the left filter cavity 7 through the upper filter cavity 1 and the left filter cavity 1 through the space 1 through the upper cavity 7 and the upper filter cavity 13 and the lower filter cavity 13; 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 recoil air inlet 4 with the upper space of the valve cavity 7 and a sewage disposal channel 23 used for communicating the sewage disposal 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 which is driven by a pneumatic motor assembly 24 to rotate and change direction 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, a first upper air hole 252 and a second upper air hole 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 hole 252 and the second upper air hole 253 can be alternately communicated with an 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 cavity 27, an oil outlet notch 256 is arranged on the side wall of the lower part of the switching valve 7 which is on 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;
in the embodiment, a differential pressure alarm 29 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 29 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 29 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 29 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 29 in a signal manner, 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 recoil valve and the electromagnetic valve in a signal manner, wherein when the electromagnetic valve 243 receives an alarm signal sent by the pressure difference alarm 29, the pneumatic motor 242 is controlled to enable the reversing valve 25 to be reversed, when the reversing valve 25 is reversed 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 to send a reversing signal to the electromagnetic valve 243 and send a back flushing signal to the recoil valve, the electromagnetic valve 243 stops the reversing valve 25 after receiving the reversing signal, and the back flushing valve receives the back flushing signal, and the back flushing valve 25 is opened for a certain time after the back flushing valve receives the back flushing signal, so that the cleaning is realized, and the pneumatic motor assembly and the back flushing assembly are simple in structure and convenient to install and maintain; in the present embodiment, a drain valve 30 is provided at the drain 5;
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 are all the time one filter cavity is used as a working filter cavity, and the other filter cavity is used as a standby filter cavity; 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 is just in butt joint with the air inlet channel 22, the second upper air hole 253 positioned at the right side is just sealed by the inner wall of the valve cavity 7, and the lower air hole 257 is just in butt joint with the right rear oil outlet channel 21 communicated with the right lower filter cavity 92, the blowdown cavity channel 27 is just in butt joint with the blowdown channel 23 and the right rear oil inlet channel 20 communicated with the right upper filter cavity 91, and 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 channel 28, the front oil outlet channel 16 and the oil outlet 3 just form an independent filter channel together; 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 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 into the self-cleaning filter body 1 from the oil inlet 2, the fuel to be cleaned sequentially enters the left upper filter cavity 81 through the front oil inlet channel 14, the oil inlet channel 26 and the left rear oil inlet channel 13, then 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 in the process that the fuel to be cleaned passes through the first filter element 12, and clean fuel filtered by the first filter element 12 sequentially enters the left lower filter cavity 82 from the inside of the first filter element 12 and the first through hole 11, and is sequentially discharged through the left rear oil outlet channel 15, the oil outlet channel 28, the front oil outlet channel 16 and the oil outlet 3, so that the fuel filtering process is completed;
in the process of filtering fuel oil by taking the left filter cavity 8 as a working filter cavity, the pressure difference alarm 29 can always detect the pressure difference between the oil inlet 2 and the oil outlet 3; when the pressure difference alarm 29 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 29 sends an alarm signal to the electromagnetic valve 243 in the pneumatic motor assembly 24, the electromagnetic valve 243 controls the pneumatic motor 242 to enable the switching valve 25 to switch after receiving the alarm signal sent by the pressure difference alarm 29, when the switching valve 25 switches to the state that the oil inlet channel 26 just rotates until the right rear oil inlet channel 21 which only communicates the front oil inlet channel 14 with the right upper filter cavity 91 is communicated, the oil outlet channel 28 just communicates only the front oil outlet channel 16 with the right rear oil outlet channel 21 which communicates 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 communication with the left rear oil outlet channel 15 communicated with the left lower filter cavity 82 and the sewage cavity channel 27 is just in butt joint communication 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 and the cam 244 trigger to send a reversing signal to the electromagnetic valve 243, the electromagnetic valve 243 stops the switching valve 25 after receiving the reversing signal, and at the moment, 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 channel 16 and the oil outlet 3 just form independent filter channels together; 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 blowdown outlet 5 form an independent backflushing channel together; so that the right filter chamber 9 is used as a working filter chamber and the left filter chamber 8 is used as a standby filter chamber; at this time, the fuel to be cleaned, which is introduced into the self-cleaning filter body 1 from the oil inlet 2, enters the right upper filter cavity 91 through the front oil inlet channel 14, the oil inlet channel 26 and the right rear oil inlet channel 20 in sequence, and then passes through the second filter element 19, in 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 right lower filter cavity 92 through the second filter element 19 and the second through hole 18 in sequence, and then is discharged through the right rear oil outlet channel 21, the oil outlet channel 28, the front oil outlet channel 16 and the oil outlet 3 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 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 discharged from the drain channel 23 and the drain outlet port 30;
in the process of filtering fuel oil by taking the right filter cavity 9 as a working filter cavity, the pressure difference alarm 29 can always detect the pressure difference between the oil inlet 2 and the oil outlet 3; when the pressure difference alarm 29 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 29 sends an alarm signal to the electromagnetic valve 243 in the pneumatic motor assembly 24, the electromagnetic valve 243 controls the pneumatic motor 242 to enable the switching valve 25 to switch after receiving the alarm signal sent by the pressure difference alarm 29, when the switching valve 25 switches to the oil inlet channel 26 to rotate 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, the oil outlet channel 28 rotates 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, the first upper air hole 252 positioned at the left side just rotates again until the first upper air hole 253 positioned at the right side just is in butt joint communication with the air inlet channel 22 just and is 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 in a butt joint way, the sewage cavity channel 27 just communicates with the sewage channel 23 and the right rear oil inlet channel 20 communicated with the right upper filter cavity 91 at the same time, 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 send a reversing in-place signal to the electromagnetic valve 243 after being triggered, the electromagnetic valve 243 stops the switching valve 25 after receiving the reversing in-place signal, and at the moment, 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 channel 28, the front oil outlet channel 16 and the oil outlet 3 just form an independent filter channel 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 sewage draining outlet 5 form an independent back flushing channel again together; so that the left filter chamber 8 is used as a working filter chamber again, and the right filter chamber 9 is used as a standby filter chamber; at this time, the fuel to be cleaned, which is introduced into the self-cleaning filter body 1 from the oil inlet 2, enters the left upper filter cavity 81 through the front oil inlet channel 14, the oil inlet channel 26 and the left rear oil inlet channel 13 in sequence, then 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 in the process of the fuel to be cleaned passing through the first filter element 12, and clean fuel filtered by the first filter element 12 enters the left lower filter cavity 82 through the first filter element 12 and the first through hole 11 in sequence, and then is discharged through the left rear oil outlet channel 15, the oil outlet channel 28, the front oil outlet channel 16 and the oil outlet 3 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 filtering function, the fuel oil carried away by the second filter element 19 is discharged from the drain channel 23 and the drain outlet port 30;
the operation is repeated, and the automatic cleaning of the filter element can be realized.
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 formula fuel filter, its 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 backflushing gas inlet is formed in the upper part of the rear side wall of the self-cleaning filter body, a gas bag backflushing assembly used for blowing high-pressure gas to the backflushing gas inlet is arranged at the backflushing gas 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 through a rear oil inlet channel, the upper space 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 rear oil outlet channel, and the upper space of the self-cleaning filter cavity is respectively communicated with the lower filter cavity through the rear oil outlet through the front oil outlet channel; the valve cavity is movably and hermetically provided with a conversion valve driven by a pneumatic motor assembly to rotate and change direction, 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 the upper part of the conversion valve, an independent oil inlet cavity channel is formed by the oil inlet notch and the inner wall of the valve cavity, a sewage draining notch is arranged on the side wall of the other side of the upper part of the conversion valve, an independent sewage draining cavity is formed by the sewage draining notch and the inner wall of the valve cavity, an oil outlet notch is arranged on the side wall of the lower part of the conversion valve at the same side as the oil inlet notch, and an independent oil outlet cavity channel is formed by the oil outlet notch and the inner wall of the valve cavity, the lower air hole which can be communicated with the back flushing cavity channel is arranged on the side wall of the lower part of the switching valve at the same side of the sewage discharging notch, the air inlet cavity channel just communicates the front oil inlet channel with the back oil inlet channel which is correspondingly communicated with one filter cavity, the oil outlet cavity channel just communicates the front oil outlet channel with the back oil outlet channel which is correspondingly communicated with the filter cavity, meanwhile, one upper air hole is just communicated with the air inlet channel in a butt joint way, the other upper air hole is just sealed by the inner wall of the valve cavity, and the lower air hole is just communicated with the back oil outlet channel which is correspondingly communicated with the other filter cavity in a butt joint way, and the sewage discharging cavity channel is just communicated with the sewage discharging channel and the back oil inlet channel which is communicated with the filter cavity at the same time.
2. A self-cleaning fuel filter as claimed in 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. A self-cleaning fuel filter as claimed in 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. A self-cleaning fuel filter as claimed in claim 1 or 2 or 3, wherein: a drain valve is arranged at the drain outlet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711343977.3A CN108067026B (en) | 2017-12-15 | 2017-12-15 | Self-cleaning fuel filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711343977.3A CN108067026B (en) | 2017-12-15 | 2017-12-15 | Self-cleaning fuel filter |
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| CN108067026A CN108067026A (en) | 2018-05-25 |
| CN108067026B true CN108067026B (en) | 2023-08-01 |
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| 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 |
| CN114962099A (en) * | 2021-12-22 | 2022-08-30 | 中国船舶重工集团公司第七一一研究所 | High-power diesel engine fuel oil pretreatment system |
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| US5871652A (en) * | 1995-08-04 | 1999-02-16 | Pipetronics, Inc. | Method for high volume pipeline water filtration |
| DE202005018853U1 (en) * | 2005-12-01 | 2007-04-05 | Boll & Kirch Filterbau Gmbh | Reversible flow filter for fluids such as water, oil and fuel, has cleaning body moving up and down in each filter element, restricted by stops near each end and with annular gap between cleaning body and filter wall |
| CN201283239Y (en) * | 2008-10-21 | 2009-08-05 | 王兴君 | Fully automatic backwashing fuel filter |
| CN104405547A (en) * | 2014-11-04 | 2015-03-11 | 张家港圣美意机械有限公司 | Duplex filter for filtering fuel oil |
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|---|---|---|---|---|
| US5871652A (en) * | 1995-08-04 | 1999-02-16 | Pipetronics, Inc. | Method for high volume pipeline water filtration |
| DE202005018853U1 (en) * | 2005-12-01 | 2007-04-05 | Boll & Kirch Filterbau Gmbh | Reversible flow filter for fluids such as water, oil and fuel, has cleaning body moving up and down in each filter element, restricted by stops near each end and with annular gap between cleaning body and filter wall |
| CN201283239Y (en) * | 2008-10-21 | 2009-08-05 | 王兴君 | Fully automatic backwashing fuel filter |
| CN104405547A (en) * | 2014-11-04 | 2015-03-11 | 张家港圣美意机械有限公司 | Duplex filter for filtering fuel oil |
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