CN207913336U - self-cleaning fuel oil filter - Google Patents

Abstract

The utility model discloses self-cleaning fuel oil filters, including set there are one dress switching valve valve chamber and two dress filter core filter chamber from secondary cleaner ontology, inlet channel and drain outlet are set from secondary cleaner ontology；Backwash cavity and the air holes communicated therewith and two upper stomatas are set in switching valve, switching valve forms oil inlet cavity with valve chamber inner wall, blowdown chamber and fuel-displaced cavity, switching valve is every time after commutation, oil inlet cavity only communicates the rear oil inlet passage that preceding oil inlet passage is communicated with a filter chamber, the rear oil discharge passage that preceding oil discharge passage is communicated with the filter chamber is only connected by fuel-displaced cavity, one upper stomata is communicated with inlet channel, port sealing on another, the rear oil discharge passage that air holes is only communicated with another filter chamber is connected, blowdown cavity is communicated with drain outlet and the rear oil inlet passage that is communicated with the filter chamber simultaneously.The utility model has the advantages that less energy consumption, energy on-line auto-cleaning filter core, cleaning efficiency is high and cleaning performance is good.

Description

Self-cleaning fuel oil filter

Technical field

The utility model is related to fuel filter equipment technical fields, and in particular to self-cleaning fuel oil filter.

Background technology

Currently, the filtering for fuel oil, existing regular fuel filter does not have automatic cleaning function.Work as fuel filter Device worked after a period of time, when filter core is blocked by the impurity particle in fluid and influences filter effect, needed to fuel oil filter Filter core cleaned；Currently used filter element cleaning method is：First arrestment work, then by filter core from oil screen Take out cleaning, reloaded in fuel oil filter again after the completion of to be cleaned, this cleaning way not only high energy consumption, seriously affect The work continuity of system, and the cleaning efficiency manually cleared up is low and cleaning performance is poor.Because then there is an urgent need for invent one kind can With less energy consumption, the online intermittent automatic cleaning filter core of energy, the fuel oil filter that cleaning efficiency is high and cleaning performance is good.

Utility model content

The purpose of this utility model be to provide a kind of less energy consumption, can online intermittent automatic cleaning filter core, cleaning efficiency it is high And the self-cleaning fuel oil filter that cleaning performance is good.

To achieve the above object, the utility model uses following technical solution：The self-cleaning fuel oil filter, packet It includes from secondary cleaner ontology, from the top of secondary cleaner ontology front side wall is provided with oil inlet, lower part is provided with oil outlet, from clear The top of filter body rear wall is provided with back flushing air import, lower part is provided with sewage draining exit, is arranged in back flushing air entrance useful Gas bag to blow from high pressure gas to back flushing air import backwashes component, there are one being set gradually from front to back from secondary cleaner ontology Valve chamber and two or so independent filter chambers side by side, the inside of each filter chamber is separated into upper filter chamber and lower filter chamber by partition board, each The through-hole of filter chamber and lower filter chamber in several connections is respectively arranged on the partition board of filter chamber, the through-hole punishment of partition board in each filter chamber The filter core not being equipped in corresponding upper filter chamber, from secondary cleaner ontology each of go up filter chamber respectively by one after oil inlet passage It is connected with valve chamber upper space, valve chamber upper space is connected by preceding oil inlet passage with oil inlet, from secondary cleaner ontology Each lower filter chamber is connected by oil discharge passage after one with valve chamber lower space respectively, and valve chamber lower space goes out before passing through respectively Oily channel is connected with oil outlet, is disposed with to be connected to from top to bottom from secondary cleaner ontology between two filter chambers Back flushing air import is logical with the inlet channel of valve chamber upper space and to be connected to sewage draining exit and the blowdown of valve chamber lower space Road；Movable sealing is provided with the switching valve that rotation commutation is driven by Pneumatic motor assembly in valve chamber, in the central shaft of switching valve To backwash cavity is provided with, radially setting is upper there are two being communicated simultaneously with backwash cavity in the upper portion side wall of switching valve Stomata, when switching valve commutates, two upper stomata energy alternate communication inlet channels, are arranged on the side side wall of upper portion of conversion valve There are oil inlet notch, oil inlet notch to form independent oil inlet cavity with valve chamber inner wall, set on the other side side wall of upper portion of conversion valve Be equipped with blowdown notch, blowdown notch forms independent blowdown chamber with valve chamber inner wall, under the switching valve of oil inlet notch homonymy Be provided with fuel-displaced notch on portion's side wall, fuel-displaced notch forms independent fuel-displaced cavity with valve chamber inner wall, with blowdown notch homonymy Switching valve lower sides on be provided with can be with the air holes that be connected of backwash cavity, the switching valve is every time by air motor After Component driver commutation, the preceding oil inlet passage rear oil inlet passage communicated corresponding with a filter chamber is just only connected by oil inlet cavity The preceding oil discharge passage rear oil discharge passage communicated corresponding with the filter chamber is just only connected by logical, fuel-displaced cavity, while a upper gas Hole be just only connected to each other with inlet channel be connected to, stomata is just sealed by valve chamber inner wall on another, and air holes is just Only the rear oil discharge passage communicated corresponding with another filter chamber be connected to each other connection, blowdown cavity just simultaneously with drain outlet and with this The rear oil inlet passage that filter chamber communicates is connected.

Further, self-cleaning fuel oil filter above-mentioned, wherein：Be provided with to detect from secondary cleaner ontology into The pressure difference alarm of pressure difference, pressure difference alarm are connect with Pneumatic motor assembly signal between hydraulic fluid port and oil outlet, air motor group Part is connect with gas bag backwash component signals, and pressure difference is more than default between pressure difference alarm detects to obtain oil inlet and outlet When safe pressure differential, pressure difference alarm can send alarm signal to Pneumatic motor assembly, and Pneumatic motor assembly receives alarm signal After can control switching valve commutation, and when switching valve commutation in place after, Pneumatic motor assembly can control stopping switching valve and to gas Packet backwash component sends backwash signal, and gas bag backwash component can be at preset timed intervals to recoil after receiving backwash signal High pressure gas is blown in gas import.

Further, self-cleaning fuel oil filter above-mentioned, wherein：Gas bag backwash component includes gas bag and control gas bag The recoil valve of opening and closing；Pneumatic motor assembly includes：It is fixedly and coaxially connected with switching valve and upper end protrudes from secondary cleaner ontology upwards Shaft, to drive shaft rotation air motor, the electricity to control air motor and be connect with pressure difference alarm signal Magnet valve, the cam being set to shaft upper shaft and be set to from secondary cleaner bodies top can with cam match merging The limit switch being connect with recoil valve and solenoid signal；Meeting after solenoid valve receives the alarm signal of pressure difference alarm transmission Switching valve commutation is controlled, and after switching valve commutates in place, the cam on shaft axle body can touch limit switch, limit switch It can be sent to solenoid valve after mutually being touched with cam and commutate signal in place and send backwash signal to recoil valve, solenoid valve receives It can stop switching valve after to commutation in place signal, recoil valve can be opened gas bag certain time after receiving backwash signal, be realized Recoil cleaning.

Further, self-cleaning fuel oil filter above-mentioned, wherein：Blowdown valve is provided at sewage draining exit.

Through the implementation of the above technical solution, the utility model has the beneficial effects that：It is easy for operation, less energy consumption, energy Online intermittent automatic cleaning filter core, cleaning efficiency are high and cleaning performance is good.

Description of the drawings

Fig. 1 is the structural schematic diagram of self-cleaning fuel oil filter described in the utility model.

Fig. 2 is the structural schematic diagram of the overlook direction of Fig. 1.

Fig. 3 is the structural schematic diagram of the right apparent direction of Fig. 1.

Fig. 4 is the enlarged diagram at the positions H shown in Fig. 3.

Fig. 5 is the structural schematic diagram of B-B sections shown in Fig. 1.

Fig. 6 is the structural schematic diagram from secondary cleaner ontology shown in Fig. 1.

Fig. 7 is the structural schematic diagram of A-A sections shown in Fig. 6.

Fig. 8 is the structural schematic diagram of filter core shown in Fig. 1.

Fig. 9 is the dimensional structure diagram of Fig. 8.

Figure 10 is the structural schematic diagram of E-E sections shown in fig. 8.

Figure 11 is shown in Fig. 1 from the position relationship schematic diagram in secondary cleaner ontology between valve chamber and each filter chamber.

Figure 12 is the structural schematic diagram of C-C sections shown in Figure 11.

Figure 13 is the structural schematic diagram of J-J sections shown in Figure 11.

Figure 14 is the structural schematic diagram of Q-Q sections shown in Figure 11.

Figure 15 is the structural schematic diagram of M-M sections shown in Figure 11.

Specific implementation mode

The utility model is described in further detail in the following with reference to the drawings and specific embodiments.

As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11, Figure 12, Figure 13, Figure 14, Tu15Suo Show, the self-cleaning fuel oil filter, including from secondary cleaner ontology 1, is provided with from the top of 1 front side wall of secondary cleaner ontology Oil inlet 2, lower part are provided with oil outlet 3, from the top of 1 rear wall of secondary cleaner ontology is provided with back flushing air import 4, lower part is set It is equipped with sewage draining exit 5, is provided at back flushing air import 4 and backwashes component 6 to blow the gas bag of high pressure gas to back flushing air import 4, Set gradually from front to back from secondary cleaner ontology 1 there are one the independent left filter chamber 8 side by side of valve chamber 7 and two or so with it is right The inside of filter chamber 9, left filter chamber 8 is separated into upper left filter chamber 81 and lower-left filter chamber 82 by first partition 10, divides in first partition 10 It is not provided with the first through hole 11 of several connection upper left filter chambers 81 and lower-left filter chamber 82, position is separately installed at first through hole 11 The first filter core 12 in upper left filter chamber 81, upper left filter chamber 81 is respectively by being set to from the left back oil inlet in secondary cleaner ontology 1 Channel 13 is connected with 7 upper space of valve chamber, and 7 upper space of valve chamber is logical from the preceding oil inlet in secondary cleaner ontology 1 by being set to Road 14 is connected with oil inlet 2, and lower-left filter chamber 82 is by being set to left back oil discharge passage 15 and valve chamber 7 from secondary cleaner ontology 1 Lower space is connected, and 7 lower space of valve chamber is by being set to preceding oil discharge passage 16 and 3 phase of oil outlet from secondary cleaner ontology 1 Connection；The inside of right filter chamber 9 is separated into upper right filter chamber 91 and bottom right filter chamber 92 by second partition 17, on second partition 17 respectively It is provided with the second through-hole 18 of several connection upper right filter chambers 91 and bottom right filter chamber 92, is separately installed with and is located at the second through-hole 18 The second filter core 19 in upper right filter chamber 91, upper right filter chamber 91 are logical from oil inlet behind the right side in secondary cleaner ontology 1 by being set to respectively Road 20 is connected with 7 upper space of valve chamber, bottom right filter chamber 92 by be set to from oil discharge passage 21 behind the right side of secondary cleaner ontology 1 with 7 lower space of valve chamber is connected；

Being disposed with from top to bottom from secondary cleaner ontology 1 between left filter chamber 8 and right filter chamber 9 is connected to recoil Gas import 4 is logical with the inlet channel 22 of 7 upper space of valve chamber and to be connected to sewage draining exit 5 and the blowdown of 7 lower space of valve chamber Road 23；Movable sealing is provided with the switching valve 25 that rotation commutation is driven by Pneumatic motor assembly 24 in valve chamber 7, in switching valve 25 It is central axial be provided with backwash cavity 251, be radially provided in the upper portion side wall of switching valve 25 simultaneously with backwash chamber Road 251 communicate first on stomata 253 on stomata 252 and second, when switching valve commutates, on first on stomata 252 and second 253 energy alternate communication inlet channel 22 of stomata, oil inlet notch 254, oil inlet are provided on the side side wall on 25 top of switching valve Notch 254 forms independent oil inlet cavity 26 with 7 inner wall of valve chamber, and blowdown is provided on the other side side wall on 25 top of switching valve Notch 255, blowdown notch 255 forms independent blowdown chamber 27 with 7 inner wall of valve chamber, in the conversion with 254 homonymy of oil inlet notch Fuel-displaced notch 256 is provided on 7 lower sides of valve, fuel-displaced notch 256 forms independent fuel-displaced cavity 28 with 7 inner wall of valve chamber, Be provided on 7 lower sides of switching valve of 255 homonymy of blowdown notch can with the air holes 257 that be connected of backwash cavity 251, The switching valve 25 is every time by after the driving commutation of Pneumatic motor assembly 24, and oil inlet cavity 26 is just only by preceding oil inlet passage 14 and a left side The left back oil inlet passage 13 that upper filter chamber 81 communicates is connected, fuel-displaced cavity 28 is just only by preceding oil discharge passage 16 and lower-left filter chamber 82 The left back oil discharge passage 15 communicated is connected, while stomata 252 is just only opposite with inlet channel 22 on the first of left side In succession lead to, stomata 253 is just sealed by 7 inner wall of valve chamber on the second of right side, and air holes 257 just only and bottom right Behind the right side that filter chamber 92 communicates oil discharge passage 21 be connected to each other connection, blowdown cavity 27 just simultaneously and drain outlet 23 and with upper right filter Oil inlet passage 20 is connected behind the right side that chamber 91 communicates；Or oil inlet cavity 26 is just only by preceding oil inlet passage 14 and upper right filter chamber 91 The right side that oil inlet passage 21 is connected behind the right side communicated, fuel-displaced cavity 28 just only communicates preceding oil discharge passage 16 with bottom right filter chamber 92 Oil discharge passage 21 is connected afterwards, while stomata 252 is just sealed by 7 inner wall of valve chamber, is located at right side on the first of left side Second on stomata 253 be just only connected to each other and be connected to inlet channel 22, and air holes 257 just with 82 phase of lower-left filter chamber Logical left back oil discharge passage 15 is connected to each other connection, blowdown cavity 27 and just drain outlet 23 and communicates simultaneously and with upper left filter chamber 81 Left back oil inlet passage 13 be connected；

In the present embodiment, it is being provided with to detect pressure difference between oil inlet 2 and oil outlet 3 from secondary cleaner ontology 1 Pressure difference alarm 29, pressure difference alarm 29 connect with 24 signal of Pneumatic motor assembly, and Pneumatic motor assembly 24 recoils with gas bag The connection of 6 signal of component is washed, is pressed more than default safety when the detection of pressure difference alarm 29 obtains pressure difference between oil inlet 2 and oil outlet 3 When poor, pressure difference alarm 29 can send alarm signal to Pneumatic motor assembly 24, and Pneumatic motor assembly 24 receives alarm signal After can control switching valve 25 commutation, and when switching valve 25 commutate in place after, Pneumatic motor assembly 24 can control stopping switching valve 25 and backwash signal is sent to gas bag backwash component 6, gas bag backwash component 6 can by pre- after receiving backwash signal If the time blows high pressure gas to back flushing air import；Automatically it not only can rapidly and accurately judge whether work filter chamber needs to carry out Automatic cleaning, avoid because judge work filter chamber need scavenging period too late due to lead to the hair of fuel oil filter filter efficiency reduction situation It is raw, the safety in utilization of equipment is improved, and stop gas supply after the high pressure gas of gas bag backwash component offer certain time, It will not be carried out continuously gas supply recoil, online intermittent automatic cleaning is realized, greatly reduce energy consumption；

In the present embodiment, gas bag backwashes component 6 and includes gas bag and control the recoil valve of gas bag opening and closing；Pneumatic motor assembly 24 include：It is fixedly and coaxially connected with switching valve 25 and upper end protrudes from the shaft 241 of secondary cleaner ontology 1, turns to drive upwards Air motor 242, the solenoid valve to control air motor 242 and be connect with 29 signal of pressure difference alarm of the rotation of axis 241 243, the cam 244 that is set on the axle body of 241 upper end of shaft and be set to from 1 top of secondary cleaner ontology can with it is convex 244 matching of wheel merges the limit switch 245 being connect with recoil valve and solenoid signal, when solenoid valve 243 receives pressure difference alarm Air motor 242 can be controlled after the alarm signal that device 29 is sent makes switching valve 25 commutate, after switching valve 25 commutates in place, shaft Cam 244 on 241 axle bodies can touch limit switch 245, and limit switch 245 can be to solenoid valve 243 after being touched with 244 phase of cam It sends commutation and signal and sends backwash signal to recoil valve in place, solenoid valve 243 receives commutation can stop after signal in place Switching valve 25, recoil valve can be opened gas bag certain time after receiving backwash signal, realize recoil cleaning, above-mentioned air motor Component and gas bag backwash modular construction are simple, convenient to install and maintain；In the present embodiment, it is provided with blowdown at sewage draining exit 5 Valve 30；

The operation principle of the utility model is as follows：

In the fuel oil filter course of work, the two filter chambers are that one of filter chamber is made always to left filter chamber 8 with right filter chamber 9 It is to work filter chamber, another filter chamber as spare filter chamber；When switching valve 25 turns to oil inlet cavity 26 only by preceding oil inlet passage 14 The left back oil inlet passage 13 communicated with upper left filter chamber 81 is connected, fuel-displaced cavity 28 is only by preceding oil discharge passage 16 and lower-left filter chamber 82 The left back oil discharge passage 15 communicated is connected, while stomata 252 is just only opposite with inlet channel 22 on the first of left side In succession lead to, stomata 253 is just sealed by 7 inner wall of valve chamber on the second of right side, and air holes 257 just only and bottom right Behind the right side that filter chamber 92 communicates oil discharge passage 21 be connected to each other connection, blowdown cavity 27 just simultaneously and drain outlet 23 and with upper right filter When oil inlet passage 20 is connected behind the right side that chamber 91 communicates, oil inlet 2, preceding oil inlet passage 14, oil inlet cavity 26, left back oil inlet passage 13, upper left filter chamber 81, the first filter core 12, first through hole 11, lower-left filter chamber 82, left back oil discharge passage 15, fuel-displaced cavity 28, it is preceding go out Independent filtration channel is just collectively formed in oily channel 16 and oil outlet 3；And back flushing air import at this time 4, inlet channel 22, Stomata 252, backwash cavity 251, air holes 257, bottom right filter chamber 92, the second through-hole 18, the second filter core 19, upper right filter chamber on one 91, independent backwash channel is collectively formed in blowdown cavity 27, drain outlet 23 and sewage draining exit 5；Left filter chamber 8 will be used as work at this time Make filter chamber, and right filter chamber 9 will be used as spare filter chamber；Then fuel oil to be cleaned is passed through from oil inlet 2 from secondary cleaner ontology 1, is waited for Clean fuel oil premenstrual oil inlet passage 14, oil inlet cavity 26, left back oil inlet passage 13 can enter upper left filter chamber 81 successively, then pass through again The first filter core 12 is crossed, during fuel oil to be cleaned passes through the first filter core 12, the impurity that contains in fuel oil to be cleaned can be by the The filter opening of one filter core 12 intercepts the outer surface for filtering and being attached to the first filter core 12, and filtered clean through the first filter core 12 Fuel oil again successively inside the first filter core 12, first through hole 11 enter lower-left filter chamber 82, then successively through left back oil discharge passage 15, go out Oil pocket road 28, preceding oil discharge passage 16 and oil outlet 3 are discharged, and complete fuel filter process；

Left filter chamber 8 as work filter chamber fuel oil is filtered during, pressure difference alarm 29 can detect always into Pressure difference between hydraulic fluid port 2 and oil outlet 3；It is more than in advance when the detection of pressure difference alarm 29 obtains pressure difference between oil inlet 2 and oil outlet 3 If when safe pressure differential, the solenoid valve 243 that pressure difference alarm 29 can be into Pneumatic motor assembly 24 sends alarm signal, solenoid valve 243 receive pressure difference alarm 29 transmission alarm signal after can control air motor 242 make switching valve 25 commutate, work as switching valve 25 commutation to oil inlet cavities 26 just turn to oil inlet passage 21 behind the right side for only communicating preceding oil inlet passage 14 with upper right filter chamber 91 Be connected, oil discharge passage 21 behind the right side that preceding oil discharge passage 16 is communicated with bottom right filter chamber 92 is just only connected by fuel-displaced cavity 28, Stomata 252 is just sealed by 7 inner wall of valve chamber on the first of left side simultaneously, stomata 253 is just on the second of right side It is only connected to each other and is connected to inlet channel 22, and the left back oil discharge passage 15 that air holes 257 is just only communicated with lower-left filter chamber 82 It is connected to each other connection, blowdown cavity 27 just simultaneously and drain outlet 23 and 13 phase of left back oil inlet passage that is communicated with upper left filter chamber 81 When connection, the cam 244 on 241 axle body of shaft can touch limit switch 245, meeting after limit switch 245 is touched with 244 phase of cam Commutation signal in place is sent to solenoid valve 243, and solenoid valve 243 receives commutation can stop switching valve 25 after signal in place, at this time Oil inlet passage 20, upper right filter chamber 91, the second filter core 19, the second through-hole behind oil inlet 2, preceding oil inlet passage 14, oil inlet cavity 26, the right side 18, oil discharge passage 21, fuel-displaced cavity 28, preceding oil discharge passage 16 and oil outlet 3 can just be collectively formed solely behind bottom right filter chamber 92, the right side Vertical filtration channel；And stomata 253 in back flushing air import 4, inlet channel 22, second, backwash cavity 251, air holes 257, Lower-left filter chamber 82, first through hole 11, the first filter core 12, upper left filter chamber 81,5 meeting of blowdown cavity 27, drain outlet 23 and sewage draining exit Independent backwash channel is collectively formed；To make right filter chamber 9 be used as work filter chamber, and left filter chamber 8 is used as spare filter chamber；At this time It is passed through the fuel oil to be cleaned from secondary cleaner ontology 1 from oil inlet 2, premenstrual oil inlet passage 14, oil inlet cavity 26, the right side are laggard successively for meeting Oily channel 20 enters upper right filter chamber 91, is waited for during fuel oil to be cleaned passes through the second filter core 19 using the second filter core 19 The impurity that contains can be intercepted filtering by the second filter core 19 and be attached to the outer surface of the second filter core 19 in cleaning fuel oil, and by the Two filter cores, 19 filtered clean product again successively inside the second filter core 19, the second through-hole 18 enter bottom right filter chamber 92, then according to The secondary oil discharge passage behind the right side 21, fuel-displaced cavity 28, preceding oil discharge passage 16 and oil outlet 3 are discharged, and complete fuel filter process；

While limit switch 245 sends commutation signal in place to solenoid valve 243, component can be backwashed to gas bag simultaneously 6 recoil valve sends backwash signal, and recoil valve can open gas bag certain time after receiving backwash signal, makes gas bag to anti- The high pressure gas of a period of time is blown in qi of chong channel ascending adversely import 4, and the time can be automatically closed to rear recoil valve and stop continuing to blow high pressure gas, in gas bag During blowing high pressure gas, high pressure gas can be successively through stomata 253, backwash cavity on back flushing air import 4, inlet channel 22, second 251, air holes 257 is blown into lower-left filter chamber 82, to make the fuel oil being detained in lower-left filter chamber 82 recoil upwards from first through hole 11 Upper left filter chamber 81 is poured outward into inside the first filter core 12, then from 12 inside of the first filter core, in fuel oil out of first filter core 12 During portion pours upper left filter chamber 81 outward, the fuel oil gone out outward can rush the impurity for being attached to 12 outer surface of the first filter core It walks, to complete the cleaning to the first filter core 12, the first filter core 12 is made to restore filtering function again, and take away the fuel oil meeting of impurity It again through blowdown cavity 27, drain outlet 23 and sewage draining exit 5, then exports and is discharged from blowdown valve 30, to complete the first filter core 12 Backwash process；

During right filter chamber 9 is filtered fuel oil as work filter chamber, pressure difference alarm 29 can also detect always Pressure difference between oil inlet 2 and oil outlet 3；It is more than when the detection of pressure difference alarm 29 obtains pressure difference between oil inlet 2 and oil outlet 3 When default safe pressure differential, the solenoid valve 243 that pressure difference alarm 29 can be into Pneumatic motor assembly 24 sends alarm signal, solenoid valve 243 receive pressure difference alarm 29 transmission alarm signal after can control air motor 242 make switching valve 25 commutate, work as switching valve 25 commutation to oil inlet cavities 26 turn to the left back oil inlet passage 13 for only communicating preceding oil inlet passage 14 with upper left filter chamber 81 again It is connected, fuel-displaced cavity 28 turns to 15 phase of left back oil discharge passage for only communicating preceding oil discharge passage 16 with lower-left filter chamber 82 again Connection, at the same on the first of left side stomata 252 just turn to again be only connected to each other with inlet channel 22 be connected to, be located at it is right Stomata 253 is just sealed by 7 inner wall of valve chamber again on the second of side, and air holes 257 just turn to again only with the right side Behind the right side that lower filter chamber 92 communicates oil discharge passage 21 be connected to each other connection, blowdown cavity 27 just again simultaneously and drain outlet 23 and with When oil inlet passage 20 is connected behind the right side that upper right filter chamber 91 communicates, the cam 244 on 241 axle body of shaft can touch limit switch 245, limit switch 245 can send commutation after being touched with 244 phase of cam to solenoid valve 243, and signal, solenoid valve 243 receive in place Commutation can stop switching valve 25 after signal in place, at this time oil inlet 2, preceding oil inlet passage 14, oil inlet cavity 26, left back oil inlet passage 13, upper left filter chamber 81, the first filter core 12, first through hole 11, lower-left filter chamber 82, left back oil discharge passage 15, fuel-displaced cavity 28, it is preceding go out Independent filtration channel is just collectively formed in oily channel 16 and oil outlet 3 again；And back flushing air import 4, inlet channel 22, first Upper stomata 252, backwash cavity 251, air holes 257, bottom right filter chamber 92, the second through-hole 18, the second filter core 19, upper right filter chamber 91, independent backwash channel is collectively formed in blowdown cavity 27, drain outlet 23 and sewage draining exit 5 again；To make 8 weight of left filter chamber New work is work filter chamber, and right filter chamber 9 is used as spare filter chamber；The combustion to be cleaned from secondary cleaner ontology 1 is passed through from oil inlet 2 at this time Oil premenstrual oil inlet passage 14, oil inlet cavity 26, left back oil inlet passage 13 can enter upper left filter chamber 81 successively, then using first Filter core 12, during fuel oil to be cleaned passes through the first filter core 12, the impurity contained in fuel oil to be cleaned can be again by first The filter opening of filter core 12 intercepts the outer surface for filtering and being attached to the first filter core 12, and through the 12 filtered clean combustion of the first filter core Oil again successively inside the first filter core 12, first through hole 11 enter lower-left filter chamber 82, then successively through left back oil discharge passage 15, fuel-displaced Cavity 28, preceding oil discharge passage 16 and oil outlet 3 are discharged, and complete fuel filter process；

While limit switch 245 sends commutation signal in place to solenoid valve 243, component can be backwashed to gas bag simultaneously 6 recoil valve sends backwash signal, and recoil valve can open gas bag certain time after receiving backwash signal, makes gas bag to anti- The high pressure gas of a period of time is blown in qi of chong channel ascending adversely import 4, and the time can be automatically closed to rear recoil valve and stop continuing to blow high pressure gas, in gas bag During blowing high pressure gas, high pressure gas can be successively through stomata 252, backwash chamber on back flushing air import 4, inlet channel the 22, the firstth Road 251, air holes 257 are blown into bottom right filter chamber 92, to keep the fuel oil being detained in bottom right filter chamber 92 anti-upwards from the second through-hole 18 It rushes in inside the second filter core 19, then upper right filter chamber 91 is poured outward from the inside of the second filter core 19, in fuel oil from the second filter core 19 During upper right filter chamber 91 is poured in inside outward, the fuel oil gone out outward can will be attached to the impurity of 19 outer surface of the second filter core It washes away, to complete the cleaning to the second filter core 19, the second filter core 19 is made to restore filtering function again, and take away the fuel oil of impurity Can be again through blowdown cavity 27, drain outlet 23 and sewage draining exit 5, then export and be discharged from blowdown valve 30, to complete the second filter core 19 Backwash process；

Repeat aforesaid operations, you can to realize the automatic cleaning to filter core.

The utility model has the advantages that：It is easy for operation, less energy consumption, energy online intermittent automatic cleaning filter core, cleaning Efficient and cleaning performance is good.

Claims (4)

1. self-cleaning fuel oil filter, it is characterised in that：Including from secondary cleaner ontology, from the top of secondary cleaner ontology front side wall Be provided with oil inlet, lower part is provided with oil outlet, the top of secondary cleaner ontology rear wall is being provided with back flushing air import, lower part It is provided with sewage draining exit, is provided in back flushing air entrance and backwashes component to blow the gas bag of high pressure gas to back flushing air import, Set gradually from front to back from secondary cleaner ontology there are one the independent filter chamber side by side of valve chamber and two or so, each filter chamber it is interior Portion is separated into upper filter chamber and lower filter chamber by partition board, and filter chamber and lower filter in several connections are respectively arranged on the partition board of each filter chamber The through-hole of chamber, the through hole of partition board is separately installed with the filter core in corresponding upper filter chamber in each filter chamber, from secondary cleaner sheet The upper filter chamber of each of body is connected by oil inlet passage after one with valve chamber upper space respectively, and valve chamber upper space passes through advance Oily channel is connected with oil inlet, from the lower filter chamber of each of secondary cleaner ontology respectively by one after oil discharge passage and valve chamber lower part Space is connected, and valve chamber lower space is connected by preceding oil discharge passage with oil outlet respectively, certainly clear between two filter chambers It is disposed with to be connected to inlet channel, the Yi Jiyong of back flushing air import and valve chamber upper space from top to bottom in filter body To be connected to the drain outlet of sewage draining exit and valve chamber lower space；Movable sealing is provided in valve chamber is driven by Pneumatic motor assembly The switching valve of commutation is rotated, central axial in switching valve is provided with backwash cavity, radial in the upper portion side wall of switching valve It is arranged there are two the upper stomata communicated simultaneously with backwash cavity, two upper stomata energy alternate communication air inlets when switching valve commutates Channel, is provided with oil inlet notch on the side side wall of upper portion of conversion valve, and oil inlet notch forms independent oil inlet with valve chamber inner wall Cavity, is provided with blowdown notch on the other side side wall of upper portion of conversion valve, and blowdown notch forms independent row with valve chamber inner wall Dirty chamber, be provided with fuel-displaced notch on the switching valve lower sides of oil inlet notch homonymy, fuel-displaced notch and valve chamber inner wall shape At independent fuel-displaced cavity, be provided with and can be connected with backwash cavity on the switching valve lower sides of blowdown notch homonymy Air holes, the switching valve every time by Pneumatic motor assembly driving commutation after, oil inlet cavity just only by preceding oil inlet passage with One filter chamber corresponds to that the rear oil inlet passage communicated is connected, fuel-displaced cavity is just only communicated preceding oil discharge passage is corresponding with the filter chamber Rear oil discharge passage be connected, while a upper stomata be just only connected to each other with inlet channel be connected to, stomata is just on another Sealed by valve chamber inner wall, and air holes just only the rear oil discharge passage communicated corresponding with another filter chamber be connected to each other connection, Blowdown cavity is just connected with drain outlet and the rear oil inlet passage that is communicated with the filter chamber simultaneously.

2. self-cleaning fuel oil filter according to claim 1, it is characterised in that：It is useful being arranged from secondary cleaner ontology To detect the pressure difference alarm of pressure difference between oil inlet and outlet, pressure difference alarm is connect with Pneumatic motor assembly signal, gas Dynamic motor sub-assembly backwashes component signals with gas bag and connect, the pressure difference between pressure difference alarm detects to obtain oil inlet and outlet When more than default safe pressure differential, pressure difference alarm can send alarm signal to Pneumatic motor assembly, and Pneumatic motor assembly receives Switching valve commutation can be controlled after alarm signal, and after switching valve commutates in place, Pneumatic motor assembly can control stopping conversion Valve simultaneously sends backwash signal to gas bag backwash component, and gas bag backwash component can be by default after receiving backwash signal Time blows high pressure gas to back flushing air import.

3. self-cleaning fuel oil filter according to claim 2, it is characterised in that：Gas bag backwash component include gas bag and Control the recoil valve of gas bag opening and closing；Pneumatic motor assembly includes：It is fixedly and coaxially connected with switching valve and upper end protrudes from clearly upwards The shaft of filter body, to drive shaft rotation air motor, to control air motor and with pressure difference alarm signal The solenoid valve of connection, the cam being set to shaft upper shaft and it is set to energy and cam from secondary cleaner bodies top Match the limit switch for merging and being connect with recoil valve and solenoid signal；When solenoid valve receives the alarm of pressure difference alarm transmission Switching valve commutation can be controlled after signal, and after switching valve commutates in place, the cam on shaft axle body can touch limit switch, Limit switch can be sent after mutually being touched with cam to solenoid valve to commutate signal in place and sends backwash signal, electricity to recoil valve Magnet valve receives commutation can stop switching valve after signal in place, and recoil valve can open one timing of gas bag after receiving backwash signal Between, realize recoil cleaning.

4. self-cleaning fuel oil filter according to claim 1 or 2 or 3, it is characterised in that：The row of being provided at sewage draining exit Dirty valve.