CN200991608Y

CN200991608Y - Filter

Info

Publication number: CN200991608Y
Application number: CN 200720033138
Authority: CN
Inventors: 俞建平
Original assignee: CHANGSHU HUANENG WATER-TREATING EQUIPMENT Co Ltd
Current assignee: CHANGSHU HUANENG WATER-TREATING EQUIPMENT Co Ltd
Priority date: 2007-01-01
Filing date: 2007-01-01
Publication date: 2007-12-19
Anticipated expiration: 2017-01-01

Abstract

The utility model relates to a filter and belongs to the filtering device domain. The utility model consists of a shell and the shell is provided with a shell clapboard to divide the shell into an upper hollow and a lower hollow; the shell clapboard is provided with pylomes which are arrayed with interval and at least one pair of the pylomes cross the filtering core; the pylomes are provided in the lower hollow of the shell and connected and fixed with the corresponding holes of the shell clapboard; a medium conducting pipe fixed under the shell and connected with the shell lower hollow and a medium extract pipe fixed on the upper part of the shell and extended to the upper hollow. The utility model is characterized in that the utility model also consists of a set of independent inverse washing synergy rooms which are divided by the clapboard and connected with the upper hollow and the lower hollow with a narrow opening and corresponding with the central part of the shell clapboard. The inverse washing device is fixed on the top of the shell with the lower end extending into the upper hollow of the shell and is connected with the opening and the medium extract pipe. The utility model can effectively clean the filtering core under the inverse washing synergy room and is beneficial to protect the filtering core and lengthen the service life.

Description

Filter

Technical field

The utility model relates to a kind of filter, is suitable for industries such as power plant, papermaking, food, medication chemistry, oil preparation and is used for to the filtration such as water, oil, gas, solvent as medium, belongs to the filter technical field.

Background technology

At present, the employed structure of filter of above-mentioned industry is by shown in Figure 2, and it comprises a cylindrical shell 1, be located at crossing filter core 2, be connected the medium fairlead 4 that being used for that cylindrical shell 1 bottom communicates with cylindrical shell cavity of resorption 11 provides the medium inlet tube 3 of medium to be filtered (former medium) to crossing filter core 2, being used for of being connected that cylindrical shell 1 top communicates with cylindrical shell epicoele 12 drawn the medium after 2 filtrations of mistake filter core in the cavity volume of cylindrical shell 1.When being used for medium filtered, sewage draining exit 33 on the medium inlet tube 3 so, backwash delivery port 32 is closed, simultaneously with the recoil water inlet 42 on the pipeline of medium fairlead 4, compressed air inlet 43, just washing bath interface 44 closes, the medium that needs to filter causes cylindrical shell cavity of resorption 11 from the inlet port 31 of medium inlet tube 3, filter by the filter core 2 of crossing that is located in the cylindrical shell cavity of resorption 11, after filtering through filter core 2 is that medium after the removal of impurities is from being used for the separating tube body, cavity of resorption 12, enter into cylindrical shell epicoele 12 in the through hole 131 on 11 the tube chamber dividing plate 13, and then draw and for use by the outlet 41 of medium fairlead 4.

Yet, above-mentioned filter in use for some time, the equipment inlet outlet pressure differential increases, and must implement backwash, uses the filter effect of keeping filter core 2.In the time will carrying out backwash, so, inlet port 31, sewage draining exit 33 on the pipeline of medium inlet tube 3 are closed, and backwash delivery port 32 is opened; Outlet 41 on the pipeline of medium fairlead 4, just wash all places of bath interface 44 closed conditions, open compressed air inlet 43, recoil water inlet 42 (also can not enable compressed air inlet 43).So, counter-flushing liquid that is used to clean and compressed air enter into cylindrical shell epicoele 12 from recoil water inlet 42, and then via through holes 131 arrives at each and crosses filter core 2, be washed in the cylindrical shell cavity of resorption 11 attaching or claiming the dirt of productive set on crossing filter core 2 to mix, and then discharge from the backwash delivery port 32 of medium inlet tube 3, the dirt of accumulation in pipe can be by sewage draining exit 33 eliminatings.

By above-mentioned explanation, can know that the filter of this structure is justifiable for the technique effect that filter medium brought.But with regard to backwash, the weak property that it shows is can't be gratifying, because counter-flushing liquid is incorporated into cylindrical shell epicoele 12 at medium fairlead 4, entered in the backwash process of filter core 2 enforcements to mistake filter core 2 through each through hole 131, the backwash flow velocity is consistent with filter operation flow velocity basically, thereby can not form crossing the backwash flow velocity of filter core 2, so be difficult to and cross the attached dirt eccysis of amassing on the filter core 2, influenced the service life of filter core 2, change frequently, cause the increase of use cost to the user.

Summary of the invention

Task of the present utility model is will provide a kind of can show excellent backwash effect and use the filter that prolonged filter core service life, avoided filter core to lose efficacy in a short time crossing filter core.

Task of the present utility model is finished like this, a kind of filter, it comprises a cylindrical shell, be provided with in the tube chamber of cylindrical shell and be used for the tube chamber is divided into cylindrical shell, the tube chamber dividing plate of cavity of resorption, cloth is useful on and connects on the cylindrical shell between on the dividing plate of tube chamber, the through hole of cavity of resorption, cross filter core at least one group, be located in the cylindrical shell cavity of resorption, fix with corresponding through hole position on the dividing plate of tube chamber and communicate, one be fixed on the cylindrical shell bottom communicate with the cylindrical shell cavity of resorption be used for to crossing the medium fairlead that the medium after crossing filter element filtering is drawn of being used for that filter core provides the medium inlet tube and of former medium to be fixed on cylindrical shell top and is stretched over the cylindrical shell epicoele, characteristics are: it also include one group that is separated out on the dividing plate of tube chamber independent of each other and with cylindrical shell on, the backwash synergy chamber that cavity of resorption communicates, the opening of each backwash synergy chamber is narrow to contract and corresponds to a central part of chamber dividing plate; One back purge system is fixed on the top of cylindrical shell, and the lower end is stretched in the cylindrical shell epicoele, communicates with described opening, medium fairlead.

Back purge system described in the utility model comprises motor, reductor, shaft coupling, Connection Block, main shaft, spacer, recoil tube, motor and reductor connect, reductor is fixed on the Connection Block, Connection Block is fixed on the top of cylindrical shell, on Connection Block, also be provided with the one stroke switch, the upper end of main shaft extends the outer and shaft coupling connection of cylindrical shell, the power output shaft of shaft coupling and reductor connects, on shaft coupling, be installed with the one division dish, match with travel switch in the contact that is distributed on the index dial, and it is corresponding with backwash synergy chamber, the lower end of main shaft is arranged in the cylindrical shell epicoele, and hub setting is in the central authorities of tube chamber dividing plate, the spacer that is connected with the medium fairlead and communicates is arranged in the cylindrical shell epicoele, be fixed on the top of cylindrical shell, spacer is provided with the medium that comes from described opening that is used for the cylindrical shell epicoele and causes the check valve of drawing for the medium fairlead in the spacer chamber, recoil tube and main shaft connect, the upper end is stretched in the spacer chamber and with the spacer chamber and is communicated, the lower end corresponds to opening, and extends a recoil that matches with opening and chew.

The geometry of the one group of backwash synergy chamber that is separated out on the dividing plate of tube chamber described in the utility model is fan-shaped substantially, is separated by demarcation strip between the adjacent backwash synergy chamber, and the top of each backwash synergy chamber is by the cover plate cap seal.

Demarcation strip described in the utility model is the equal angles demarcation strip, and the quantity of demarcation strip equates with the quantity of backwash synergy chamber.

The position of the liquid outlet that the recoil that is arranged on the recoil tube lower end described in the utility model is chewed is in alignment with described opening.

Be provided with between recoil tube described in the utility model extend on the upper end body in the spacer chamber and be used for the liquid-through hole that communicates with the spacer chamber.

Be provided with one group of stay pipe in order to reinforcement in the cylindrical shell epicoele described in the utility model, the upper end of each stay pipe and the inner top surface of cylindrical shell are fixed, and lower end and backwash synergy chamber are fixed.

Cylindrical shell described in the utility model is provided with visor.

Cylindrical shell described in the utility model is provided with access hole.

Advantage of the present utility model: owing on the cylindrical shell dividing plate, be separated out one group of backwash synergy chamber independently separately, so in the time will implementing backwash, the counter-flushing liquid of being introduced by the medium fairlead enters into corresponding backwash synergy chamber by this from corresponding opening through the motion of back purge system, and the filter core of crossing corresponding to below, backwash synergy chamber is got effective washing; Since on the dividing plate of tube chamber every having set out one group of backwash synergy chamber; the counter-flushing liquid of in the past sharing equally when backwash in the whole cylindrical shell epicoele is become to concentrate on certain backwash synergy chamber to be cleaned one by one; therefore the flow velocity in the unit interval has obtained many times increase; can significantly improve equally the cleaning effect of crossing filter core; thereby help to protect filter core, prolong its service life.

Description of drawings

Fig. 1 is an example structure figure of the utility model filter.

Fig. 2 is the filtration device structure figure in the prior art.

The specific embodiment

Below the applicant to the detailed description of embodiment, to help to understand the utility model more, make that simultaneously advantage of the present utility model and good effect are distincter, but can not limit the utility model with embodiment, any pro forma unsubstantiality adds or conversion all should be thought and belongs to technical scheme category disclosed in the utility model.

Please in conjunction with Fig. 1, clearly provided a kind of concrete structure of cylindrical shell 1, it is fixing for cylindrical shell 1 is supported, therefore extend one group of uniform supporting fixing feet 16 in its bottom, for example change crossing filter core 2 or the like and be provided with access hole 15 on cylindrical shell in the cylindrical shell cavity of resorption 11 for the ease of the part in the upper and

lower chamber

12,13 of cylindrical shell that is separated out by tube chamber dividing plate 13 in the cylindrical shell 1 having been carried out maintenance, maintenance, replacing, the lid on the access hole 15 is in seal cover at ordinary times and covers state.The effect that is located at the visor 14 on the cylindrical shell 1 is self-evident, is used to watch the duty of cylindrical shell 1.This figure is as a kind of specific embodiment figure, only showed that a group of being positioned at chamber dividing plate 13 below crosses filter core 2, in cylindrical shell cavity of resorption 11, be provided with two groups and even when organizing filter core 2 if desired more, so concrete set-up mode should be similar, be used for fixing the dividing plate of respectively organizing filter core 2 as long as correspondingly increase, so can not limit the utility model by the number of the group number of crossing filter core 2.Crossing filter core 2 with one group is example, and the lower end of crossing filter core 2 fixes in the bottom of cylindrical shell cavity of resorption 11, and the upper end is fixed in the through hole 131 of the correspondence on the chamber dividing plate 13 by crossing filter core holder 21, and undoubtedly, the quantity of through hole 131 should be identical with the quantity of crossing filter core 2.By cross medium after filter core 2 filters such as water, oil, gas, solvent for example toluene or dimethylbenzene or the like just via through holes 131 enter into cylindrical shell epicoele 12.

Be used for to cylindrical shell cavity of resorption 11 introduce former medium for example an end of the medium inlet tube 3 of former water also be that the interface 111 of cylindrical shell cavity of resorption 11 bottom center positions is connected with what be arranged on cylindrical shell 1 bottom, the other end constitutes three-way pipe structure, promptly include and be used for the inlet port 31 and the backwash delivery port 32 that dock with former medium, on the pipeline of inlet port 31 and backwash delivery port 32, be equipped with the valve of control break-make.When the normal operation of filter is promptly filtered, valve on the pipeline of backwash delivery port 32 is closed so, sewage draining exit 33 is as the same, and the valve on the passage of inlet port 31 is opened, so that be supplied to filter core 2 to filter in former medium such as former water by inlet port 31, the pure medium of crossing after filter core 2 filters enters in the cylindrical shell epicoele 12.

Be used for the end that pure medium after filter core 2 filters causes the medium fairlead 4 of use that passed through of cylindrical shell epicoele 12 is promptly extend in the cylindrical shell epicoele 12 upper end, connect with the following back purge system that will describe in detail 6, when the normal operation of filter is promptly filtered, so, valve opening on the pipeline of the outlet 41 of medium fairlead 4 other ends, and recoil water inlet 42 connect valve closing on the pipeline, in addition, the compressed air inlet 43 on the pipeline of medium fairlead 4, just wash the bath interface 44 also be in closed condition.

The utility model since on tube chamber dividing plate 13 every setting out one group of independent of each other and backwash synergy chamber 5 that communicate with the upper and lower chamber 12,11 of cylindrical shell, therefore enter corresponding backwash synergy chamber 5 by the medium via through holes of crossing after filter core 2 filters 131, opening 51 by backwash synergy chamber 5 flows out again, opening 51 is narrow contracting, and is in the position, center of a chamber dividing plate 13.In the utility model, concrete quantity for backwash synergy chamber 5 does not need restriction, but should have two at least, if be two, under the flow status such as grade of counter-flushing liquid, the flow velocity of counter-flushing liquid in the unit interval that enters into backwash synergy chamber 5 can double so; If be four of three mistakes or more for a long time, reason is the same so.As specific embodiment, the applicant has provided on cylindrical shell dividing plate 13 every having set out eight backwash synergy chambers 5, and the spatial geometric shape of each backwash synergy chamber 5 is fan-shaped, by be equiangularly arranged in demarcation strip 52, cover plate 53 is built.As from the foregoing, anyly increase, the quantity of anti-reflection flushing synergy chamber 5, all should be considered as and the technical solution of the utility model equivalent.

Please continue in conjunction with Fig. 1, the motor 61 of the back purge system of recommending as the utility model 6 cooperates with reductor 62 transmissions, reductor 62 usefulness bolts and Connection Block 64 fix, and Connection Block 64 is same with fixing at the top of bolt and cylindrical shell 1, and the travel switch 641 that is arranged on the Connection Block 64 is electrically connected (not shown) with the electric control box that is used for the work of controlled filter device.End is stretched over promptly to extend in the Connection Block 64 outside the cylindrical shell 1 and connects with shaft coupling 63 transmissions on the main shaft 65, shaft coupling 63 connects mutually with the power output shaft of reductor 62 again, on shaft coupling 63, be equipped with an index dial 631, the equal distribution number of the contact on the index dial 631 is with that adapt or claim corresponding every being located at backwash synergy chamber 5 on the cavity dividing plate 13, each contact all acts on each other with travel switch 641, when travel switch 641 is touched in the contact, motor stops a period of time, specifically when describing operation principle of the present utility model, explain by the applicant and, the lower end of main shaft 65 by bearing block 651 hub setting in the centre of tube chamber dividing plate 13.Spacer 66 is outstanding solid in cylindrical shell epicoele 12, promptly be fixed on the top of cylindrical shell 1, the bottom seals with seal cover 663, described medium fairlead 4 connects mutually with spacer 66 and communicates with spacer chamber 662, the effect of set check valve 661 is on spacer 66, can only pass through for the medium of filter normally move the time, and the counter-flushing liquid can not make backwash the time passes through.That connect with main shaft 65 and be arranged in spacer chamber 662 with the upper end of the recoil tube 67 of main shaft 65 rotations, and offer liquid-through hole 672, the lower end then corresponds to opening 51 positions of repeatedly mentioning the front, and extend a recoil in this position and chew 671, recoil is chewed 671 size and opening 51 and is matched substantially, when backwash, counter-flushing liquid just draws and recoils and chew 671 from

recoil tube

67, and 671 liquid outlet 6711 ejections (gushing out) are chewed in recoil certainly.In addition, for the weight that the top that makes cylindrical shell 1 is enough to bear back purge system 6, therefore take on by one group of stay pipe 7 setting up.

The applicant is described in detail the operation principle of the utility model filter in conjunction with Fig. 1, is that water is made example with processed medium.

When normal operation, back purge system 6 is in the state of quitting work, it should be opening 51 positions that have been in corresponding to one of them the synergy chamber in one group of backwash synergy chamber 5 that the recoil of the recoil tube 67 of this device chews 671, and promptly liquid outlet 6711 is docked at opening 51 places just.According to not having other method of operation with prior art, close the backwash delivery port 32 on the medium inlet tube 3, the valve on the sewage draining exit 33, open inlet port 31, former water just enters the cylindrical shell cavity of resorption 11 through interface 111 from medium inlet tube 3, crosses filter core 2 for one group in the cylindrical shell cavity of resorption 11 and filters.Water after the filtration enters into each backwash synergy chamber 5 from through hole 131, except chew those backwash synergy chambers 5 that face toward 671 by the recoil of recoil tube 67, water in all the other all backwash synergy chambers 5 is just directly poured into the cylindrical shell epicoele 12 from opening 51 separately, and then the check valve 661 on the spacer 66 of back purge system 6 enters into spacer chamber 662, because medium fairlead 4 continues on spacer 66, and communicate with spacer chamber 662, therefore enter into the water in spacer chamber 662 just by medium fairlead 4 carrying-offs from check valve 661, promptly until causing use by outlet 41, this moment be arranged on recoil water inlet 42 on the medium fairlead 4, compressed air inlet 43, just washing the bath interface 44 passage on valve all be in closed condition.In said process, water in one of them backwash synergy chamber 5 is drawn from opening 51, chew 671 tube chambers that enter into recoil tube 67 through liquid outlet 6711, recoil, and then the liquid-through hole 672 that is arranged in from recoil tube 67 upper ends on the body in spacer chamber 662 flows out to spacer chamber 662, drawn by medium fairlead 4 equally.

As the reason that industry is known, when filter operation a period of time, after inlet outlet pressure differential reached setting value, the signal according to differential pressure transmitter entered backwashing procedures.Backwashing procedures has two kinds of control modes: the one, and automatic control, adopt PLC (programmable controller) control, during backwash according to the signal of differential pressure transmitter by PLC switching controls valve and starter motor 61, main shaft 65 touches with travel switch 641 mutually according to the contact on the index dial 631, aim at first backwash synergy chamber 5 rear motors 61 and stop a period of time (time can comply with to be needed to set), carry out backwash, reach starter motor 61 behind the setting-up time, successively backwash is carried out in each backwash synergy chamber 5, the filter after the backwash is in standby or enters again and comes into operation.The 2nd, manual control, electric appliance control box is installed on filter, switch valve and starter motor 61 when differential pressure reaches setting value, main shaft 65 stops a period of time (time can comply with to be needed to set) according to index dial 631 corresponding first backwash synergy chamber 5 rear motors 61, carry out backwash, reach starter motor 61 behind the setting-up time, successively each backwash chamber 5 is carried out backwash (when aiming at each backwash synergy chamber 5, the starting of motor 61, stop to finish by the automatic control circuit in the electric appliance control box, motor 61 need not to cut out flushing valve when rotating), around a circle has been finished flushing to all backwash synergy chambers 5 after, automatically stop backwash, enter down then and just washing step together, just washing mainly be when rinsing out backwash by the impurity of bringing in backwash water and the gas, inlet port when just washing on the pipeline of medium inlet tube 3 31 is opened, sewage draining exit 33, backwash delivery port 32 is closed; Outlet 41 on the pipeline of medium fairlead 4, compressed air inlet 43, recoil water inlet 42 all places closed conditions are opened and are just being washed bath interface 44.Filter after the flushing is in standby or enters the state of coming into operation again.

Carrying out in the process of backwash the valve opening on backwash delivery port 32 passages of medium inlet tube 3, the valve closing on inlet port 31 passages to crossing filter core 2; (to enable compressed air simultaneously is example to valve opening on the recoil water inlet 42 of medium fairlead 4, the passage of compressed air inlet 43, if do not enable, valve on the pipeline of closes compression air intlet 43 so), outlet 41, just wash valve closing on the passage of bath interface 44.When motor 61 work of ordering about back purge system 6, drive main shafts 65 rotations by shaft coupling 63 because recoil tube 67 and main shaft 65 connect, therefore in the process of main shaft 65 rotations recoil tube 67 with revolving.Owing to be equipped with index dial 631 on the shaft coupling 63 and on Connection Block 64, be provided with travel switch 641, therefore when the contact on the index dial 631 contacts with travel switch 641, the recoil of recoil tube 67 belows is chewed 671 and also just has been aligned in the opening 51 of backwash synergy chamber 5 just, and give electric control box or PLC by travel switch 641 to signal, motor 61 is temporarily quit work a period of time.Make the recoil of recoil tube 67 belows chew 671 openings 51 that are registered to corresponding backwash synergy chamber 5 one by one.The counter-flushing liquid of being introduced by medium fairlead 4 enters into spacer chamber 662, following recoil tube 67 through liquid-through hole 672 flows downward, be injected to backwash synergy chamber 5 until the liquid outlet 6711 of chewing 671 from recoil by means of opening 51, the counter-flushing liquid that enters into backwash synergy chamber 5 entered in the filter core 2 from through hole 131, thereby had finished the cleaning of crossing filter core 2 corresponding to 5 belows, some backwash synergy chamber.Then motor 61 is worked again, make recoil tube 67 turn over a station again, another contact on travel switch 641 and the index dial 631 with touch mutually, 671 openings 51 that have been aligned in another backwash synergy chamber 5 are again just chewed in the recoil of this moment, carry counter-flushing liquid to another backwash synergy chamber 5, with filter core 2 backwashes excessively of corresponding another 5 belows, backwash synergy chamber, and the like, until the filter core backwash of finishing all 5 belows, backwash synergy chamber excessively.In backwash process, the check valve 661 that is located on the spacer 66 of back purge system 6 is in closed condition.

By the explanation above-mentioned to the applicant, can know that fully the backwash effect to crossing filter core 2 that the utility model shows should be ultimate attainment, because if with eight backwash synergy chambers 5 shown in scheming is example, compare with Fig. 2 of prior art so, flow velocity can increase by 8 times, and that is to say to increase by 8 times flushing flow rate in the identical unit interval.

Claims

1, a kind of filter, it comprises a cylindrical shell (1), be provided with in the tube chamber of cylindrical shell (1) and be used for the tube chamber is divided into cylindrical shell, cavity of resorption (12), (11) tube chamber dividing plate (13), cloth was useful on and connects on the cylindrical shell between tube chamber dividing plate (13) was gone up, cavity of resorption (12), (11) through hole (131), cross filter core (2) at least one group, be located in the cylindrical shell cavity of resorption (11), fix with corresponding through hole (131) position on the tube chamber dividing plate (13) and communicate, one be fixed on cylindrical shell (1) bottom communicate with cylindrical shell cavity of resorption (11) be used for to crossing the medium fairlead (4) that the medium of crossing after filter core (2) filters is drawn of being used for that filter core (2) provides the medium inlet tube (3) and of former medium to be fixed on cylindrical shell (1) top and is stretched over cylindrical shell epicoele (12), it is characterized in that it also include one group that is separated out on the tube chamber dividing plate (13) independent of each other and with cylindrical shell on, cavity of resorption (12), (11) the backwash synergy chamber (5) that communicates, the opening (51) of each backwash synergy chamber (5) is narrow to contract and corresponds to a central part of chamber dividing plate (13); One back purge system (6) is fixed on the top of cylindrical shell (1), and the lower end is stretched in the cylindrical shell epicoele (12), communicates with described opening (51), medium fairlead (4).

2, filter according to claim 1, it is characterized in that described back purge system comprises motor (61), reductor (62), shaft coupling (63), Connection Block (64), main shaft (65), spacer (66), recoil tube (67), motor (61) connects with reductor (62), reductor (62) is fixed on the Connection Block (64), Connection Block (64) is fixed on the top of cylindrical shell (1), on Connection Block (64), also be provided with one stroke switch (641), the upper end of main shaft (65) extends outer and shaft coupling (63) connection of cylindrical shell (1), shaft coupling (63) connects with the power output shaft of reductor (62), on shaft coupling (63), be installed with one division dish (631), match with travel switch (641) in the contact that is distributed on the index dial (631), and it is corresponding with backwash synergy chamber (5), the lower end of main shaft (65) is arranged in cylindrical shell epicoele (12), and hub setting is in the central authorities of tube chamber dividing plate (13), the spacer (66) that is connected with medium fairlead (4) and communicates is arranged in cylindrical shell epicoele (12), be fixed on the top of cylindrical shell (1), spacer (66) is provided with the medium that comes from described opening (51) that is used for cylindrical shell epicoele (12) and causes the check valve (661) of drawing for medium fairlead (4) in the spacer chamber (662), recoil tube (67) connects with main shaft (65), the upper end is stretched in the spacer chamber (662) and with spacer chamber (662) and is communicated, the lower end corresponds to opening (51), and extends a recoil that matches with opening (51) and chew (671).

3, filter according to claim 1, the geometry that it is characterized in that the described one group of backwash synergy chamber (5) that is separated out on tube chamber dividing plate (13) is fan-shaped substantially, separated by demarcation strip (52) between the adjacent backwash synergy chamber (5), the top of each backwash synergy chamber (5) is by cover plate (53) cap seal.

4, filter according to claim 3 is characterized in that described demarcation strip (52) is the equal angles demarcation strip, and the quantity of demarcation strip (52) equates with the quantity of backwash synergy chamber (5).

5, filter according to claim 2 is characterized in that the position of liquid outlet (6711) that the described recoil that is arranged on recoil tube (67) lower end chews (671) is in alignment with described opening (51).

6, filter according to claim 2, it is characterized in that described recoil tube (67) be provided with between on the upper end body in the spacer chamber that extend into (662) and be used for the liquid-through hole (672) that communicates with spacer chamber (662).

7, filter according to claim 1, it is characterized in that being provided with in the described cylindrical shell epicoele (12) one group of stay pipe (7) in order to reinforcement, the inner top surface of upper end of each stay pipe (7) and cylindrical shell (1) is fixed, and lower end and backwash synergy chamber (5) are fixing.

8, filter according to claim 1 is characterized in that described cylindrical shell (1) is provided with visor (14).

9, filter according to claim 1 is characterized in that described cylindrical shell (1) is provided with access hole (15).