CN206793172U - A kind of backwash filter - Google Patents

Abstract

The utility model provides a kind of backwash filter, belongs to field of mechanical technique.It solves the problems, such as that existing filter developing result is bad.It includes body, there is water inlet on body, delivery port and the sewage draining exit that can be opened and closed, tubular filter core is provided with body, the water inlet of body is connected with delivery port by filter core, the cleaning rod with inner chamber is provided with filter core, the sewage discharge tube with the intracavity inter-connection of cleaning rod is offered on the sidepiece of cleaning rod, filter core bottom has the decontamination mouth being connected with sewage draining exit, cleaning rod lower ending opening is simultaneously relative with decontamination mouth, the outside of cleaning rod has forced section, impeller is provided with cleaning rod, and between the bottom wall of the lower end of cleaning rod and filter core inner chamber have the supporting construction that cleaning rod is rotated can be supported when current pass through impeller.It has the advantages that dirt-absorbing ability is strong, developing result is good.

Description

A kind of backwash filter

Technical field

The utility model belongs to field of mechanical technique, is related to a kind of filter, more particularly to a kind of backwash filter.

Background technology

With the progress and the improvement of people's living standards of science and technology, people start to using water and diet in daily life Health has higher requirement.At present, increasing people starts using a kind of fore filter to carrying out primary purification with water, To be filtered to impurity in pipe network etc..The operation principle of fore filter is generally：Running water is before water inlet is linked into Put in the housing of filter, flowed out for users to use from delivery port again after the filter element filtering in housing.This is fore filter Normal operating conditions, but many impurity and jelly, impurity and jelly can be remained on filter core in use for some time Typically it is difficult to clean up, is all to connect blowoff valve, it is necessary to open blowoff valve when clearing up in the housing lower end of fore filter at present, makes The blow-off pipe of blowdown connects with water inlet, running water is flowed through from water inlet, by be will be attached to during cartridge surface on filter core Impurity develop and be discharged to by blowoff valve in blow-off pipe.

It is only simple using cartridge surface is run water through however, for the jelly being bonded on filter core, often because Not enough lead to not effectively clear up jelly from filter core for flow intensity.In order to solve this problem, China Patent was once disclosed a kind of fore filter [application number：201520252203.X], it includes being connected water with exterior line Connecting portion and the filter house communicated with connecting portion, filter house bottom are provided with the ball valve of draining, and filter house includes the screen pack of tubular, Inside screen pack along its it is axially arranged have a siphon type flusher, siphon type flusher is included along the axially arranged length of screen pack The sewage discharge tube of strip, drain outlet is additionally provided with inside siphon type flusher, sewage discharge tube connects with drain outlet, drain outlet end End connects with ball valve.Drain outlet in the sewage discharge tube and device of strip collectively forms siphon pipe, sewage discharge tube close to screen pack, Negative pressure is produced at sewage discharge tube, the impurity on filter screen is continuously drawn into by blow-off pipe by suction caused by siphonage in a steady stream It is interior, realize the convenient cleaning of the impurity on filter screen.

Above-mentioned fore filter although can solve the problem that cleaning jelly the problem of, but it there is also some shortcomings it Place：Siphon pipe is rotated by the way that people are manually operated, because the manually operated velocity of rotation for causing siphon pipe is limited, Quick rotation can not be formed, thus while negative pressure can be formed at the sewage discharge tube of siphon pipe, but caused suction is but not Can be very strong.And because the viscosity of jelly is very strong, if caused suction is insufficient, it is difficult that will be attached on filter core to be still Jelly is to clearing up.For such case, the method that people most often take is to be used as driving by increasing a motor Part come drive siphon pipe formed quick rotation, although this mode can effectively solve the problem that above mentioned problem, user can be increased again Purchase cost, and motor-driven mode can also increase the use cost of user.

The content of the invention

The purpose of this utility model is in view of the above-mentioned problems existing in the prior art, it is proposed that a kind of backwash filter, Technical problem to be solved is how to improve developing result.

The purpose of this utility model can be realized by following technical proposal：

A kind of backwash filter, including body, there is water inlet, delivery port and the blowdown that can be opened and closed on body Mouthful, tubular filter core is provided with described body, the water inlet of body is connected with delivery port by filter core, described filter core It is interior to be provided with the cleaning rod with inner chamber, the sewage discharge tube with the intracavity inter-connection of cleaning rod, institute are offered on the sidepiece of cleaning rod The filter core bottom stated has the decontamination mouth being connected with sewage draining exit, and described cleaning rod lower ending opening is simultaneously relative with decontamination mouth, clearly The outside for washing rod has forced section, it is characterised in that impeller is provided with described cleaning rod, and in the lower end of cleaning rod and filter core The supporting construction that cleaning rod is rotated can be supported when current pass through impeller by having between the bottom wall of inner chamber.

It is same as the prior art during the normal filtration of this backwash filter, all it is that control of sewage disposal mouth is closed, then Water accesses from water inlet, by flowing ultimately into delivery port after filter element filtering for users to use.When needing filter cartridge flushing, control Sewage draining exit, which is opened, makes sewage draining exit directly be connected with the decontamination mouth of filter core bottom, so, also water inlet is passed through filter in fact The inner chamber of sewage discharge tube, cleaning rod on core, cleaning rod and the decontamination mouth of filter core bottom and with sewage draining exit formed connect, then by The water of water inlet access will be discharged directly from sewage draining exit.

Due to having supporting construction between the lower end of cleaning rod and the bottom wall of filter core inner chamber, then when water flows out of cleaning rod Out-of-date, current can be acted on the impeller being arranged in cleaning rod so that cleaning rod can using supporting construction as fulcrum and from Dynamic formed rotates.The outside tool forced section of cleaning rod, during cleaning rod rotates, forced section can be by cleaning rod outside and filter Water agitation between in-core wall.Simultaneously because the sewage discharge tube with the intracavity inter-connection of cleaning rod is provided with the outside of cleaning rod, clearly Negative pressure will be produced during rotation at sewage discharge tube by washing rod, that is, be formed by entering cleaning outside cleaning rod through sewage discharge tube Suction in rod.Under the collective effect of agitation force caused by suction and forced section, adsorb impurity on filter core inwall and Jelly is easy for be rinsed from filter core, and is entered in cleaning rod by sewage discharge tube and realized and rinse.

This backwash filter enables cleaning rod to be automatically formed soon when rinsing by the cooperation of impeller and supporting construction The rotation of speed, and the impurity and jelly that be will be attached in rotation process by forced section and sewage discharge tube collective effect on filter core It can be smoothly drawn into cleaning rod, improve the developing result of filter core well.

In above-mentioned backwash filter, described sewage discharge tube is arranged on the lateral surface of forced section, described soil pick-up Mouthful quantity at least two and each sewage discharge tube along cleaning rod axial direction arrangement, described forced section two adjacent sewage discharge tubes it Between form blocking section, and the lateral surface of blocking section and the lateral surface of forced section are flush.Forced section two adjacent sewage discharge tubes it Between form blocking section, and the lateral surface of blocking section and the lateral surface of forced section are flush, and also meaning that the setting of each sewage discharge tube is Independently of each other, it is non-interference, then the very first time will to be respectively formed negative pressure at each sewage discharge tube when cleaning rod rotates.

Be the equal of to first pass through the straight trough that a whole piece is drawn in cleaning rod sidepiece in background technology, then using rib in straight trough It is interior by straight trough lattice into for the mode of several sewage discharge tubes, then cleaning rod is that elder generation is formed by the notch of straight trough certainly when rotating Negative pressure makes impurity and jelly be drawn into straight trough, is then allocated by each sewage discharge tube, also meant that in background technology again The negative pressure of fore filter be to be formed at the notch of straight trough, rather than formed at each sewage discharge tube, and a whole piece Vacuum effect caused by straight trough is clearly weaker, and this is determined by the length of straight trough.So compared to background skill For art, negative pressure caused by each sewage discharge tube set-up mode in the application is substantially bigger, therefore is easier impurity And jelly is inhaled from the inwall of filter core, so as to also just make acquired developing result more preferable.

In above-mentioned backwash filter, the quantity of described forced section is at least two, and one of forced section On position and each sewage discharge tube remaining forced section on of each sewage discharge tube along cleaning rod axial direction it is mutual along the axial position of cleaning rod Stagger.

Because filter core is tubular, by the way that the quantity of forced section is arranged at least two, and in processing by it In position of each sewage discharge tube along cleaning rod axial direction on a forced section be arranged to each sewage discharge tube on remaining forced section along clear Wash mandrel to position mutually stagger, in such event equivalent to making each sewage discharge tube face relative with filter core not phases when rotating Together, this is also implied that when cleaning rod rotates by each sewage discharge tube as cleaning rod rotates that the whole inwall of filter core can be entered Row soil pick-up, soil pick-up area reach maximum, acquired soil pick-up best results.

There are two inclined planes in above-mentioned backwash filter, on described forced section and by two inclined plane phases The distance between the soil pick-up face, two inclined planes of connection is gradually reduced along the protrusion direction of forced section, and described sewage discharge tube is positioned at suction In soiled surface, and the lateral surface of blocking section is located on soil pick-up face.

There is two inclined planes extended forward, and protrusion direction of the distance between two inclined planes along forced section on forced section It is gradually reduced, forced section is formed the flat that the thickness of forced section is gradually reduced along its protrusion direction, this shape is advantageous to The rotation of cleaning rod.Soil pick-up face also means that soil pick-up face is located on forced section in filter core between two inclined planes Wall but be not bonded with the inwall of filter core, so on the one hand can shorten the distance between sewage discharge tube and filter core inwall, make filter core On impurity and jelly be easier to be drawn into cleaning rod, improve developing result, on the other hand again can prevent in forced section The phenomenon for being in contact with filter core inwall and causing cleaning rod to be stuck.

In above-mentioned backwash filter, described cleaning rod is made of plastic material, and cleaning rod is with impeller Integral structure.

It is well known that working of plastics is all one-time formed by mould, therefore cleaning rod is molded using plastic material, can To be molded according to the structure for the cleaning rod for being fixed with impeller, the cleaning rod so come out by mould molding will come with Impeller.Die sinking is related to the production cost of enterprise, although also relevant with the purchase cost of user, enterprise is weight after mould molding Use again, therefore to be far smaller than configuration driven motor institute increased for the purchase cost on actually increased to unique user Purchase cost, almost it can be ignored.

In above-mentioned backwash filter, described filter core has dowel, at least one end and the decontamination mouth of dowel Inwall be fixedly connected with, described impeller includes supporting table and some blades circumferentially connected along supporting table, described support Structure includes positioning plush copper raised from dowel, and the positioning plush copper described in backwash is resisted against in supporting table lower end At the heart.Rotated if directly the lower end of cleaning rod is resisted against on the bottom wall of filter core inner chamber, then be easy for silt occur The problem of snapping onto between cleaning rod lower end and filter core bottom wall of inner cavity and causing cleaning rod to be stuck.

This backwash filter on filter core by setting dowel, at least one end of dowel and the inwall phase of decontamination mouth It is connected, there is upward positioning plush copper on dowel, water is entered in the inner chamber of cleaning rod and made from sewage discharge tube in backwash With in the supporting table of impeller, supporting table stress and drive cleaning rod to move down and positioning plush copper is resisted against supporting table lower end Center at so that cleaning rod can be rotated using positioning plush copper as the center of circle.The presence of plush copper is positioned so that cleaning simultaneously Certain gap is formed between the bottom of rod and the bottom wall of filter core inner chamber, this structure can prevent silt to be stuck in cleaning rod bottom Between the bottom wall of filter core inner chamber, smoothness when cleaning rod rotates is improved, so as to ensure that cleaning rod to a certain extent Developing result caused by rotation.

In above-mentioned backwash filter, the lower surface of described supporting table is the circular conical surface of indent.

The lower surface of supporting table is arranged to the circular conical surface of indent, then the lower end that supporting table is resisted against when positioning plush copper is come When rotating cleaning rod, the convex crown would not scoot about in the position of supporting table lower end because of the rotation of cleaning rod, Cleaning rod is more stably rotated, so can just make each sewage discharge tube stably by impurity during cleaning rod rotates And jelly is drawn into cleaning rod effect during lifting backwash.

In above-mentioned backwash filter, as another technical solution, described filter core has dowel, dowel At least one end and the inwall of decontamination mouth be fixedly connected with, described supporting construction includes thimble raised from dowel, described Thimble sidepiece has convex shoulder, and the thimble described in backwash passes through the centre bore of impeller, and the lower end of impeller is resisted against convex shoulder Go up and make to form gap between cleaning rod bottom and the bottom wall of inner cavity of filter core.

Due to having the thimble with the connecting hole face at the center of impeller on dowel, then make when sewage draining exit is opened After cleaning rod moves down, thimble can pass through the centre bore of impeller, simultaneously because having convex shoulder on thimble, then the lower end of impeller It will be resisted against on convex shoulder, so that cleaning rod is rotated by the center of circle of thimble, while the presence of convex shoulder causes cleaning rod Form certain gap between the bottom wall of bottom and filter core inner chamber, this structure can also prevent silt be stuck in cleaning rod bottom with Between the bottom wall of filter core inner chamber, improved while being rotated automatically to improve developing result by cleaning rod when cleaning rod rotates Smoothness.

Be provided with above-mentioned backwash filter, between described cleaning rod and filter core makes cleaning when sewage draining exit is closed The location structure that rod stops operating.

Although sewage draining exit is closed in normal filtration, cleaning rod in this process may also can be by The effect of water inlet and produce rotation, this is also to realize a technological difficulties for having to overcome when cleaning rod rotates automatically.

Therefore this backwash filter sets location structure between cleaning rod and filter core, can be made clearly by location structure Wash rod to stop operating when sewage draining exit is closed, so as to which and can reaches while realizing that cleaning rod is rotated to improve developing result automatically Realize unnecessary rotation of the cleaning rod in normal filtration.

In above-mentioned backwash filter, described location structure include be arranged in cleaning rod ball float, be arranged at Butting section on the outside of ball float upper end and the stopper section being arranged on the inside of filter core upper end, when sewage draining exit is closed, cleaning rod is in ball float Buoyancy float downward and the sidepiece of butting section and the sidepiece of stopper section is leant.

Sewage draining exit close when, the external and internal pressure of body is in poised state, now cleaning rod only by ball float buoyancy this One external force effect.So the buoyancy of ball float will drive cleaning rod to float, and make on the butting section and filter core on the outside of cleaning rod The stopper section of end inner side leans, so that circumferentially rotating for cleaning rod is prevented by stopper section, to ensure cleaning rod just Often remained stationary as during filtering.

In above-mentioned backwash filter, described filter core upper surface has the baffle plate of annular, baffle plate inner side With in cross stop tab, described stopper section is the flange bent downwards from stop tab.

Filter core is cylindrical in shape, and is not easy directly to go out stopper section in the inwall processing of filter core in production, therefore first on baffle plate To set one in annular and inner side to have be in cross stop tab, and one is then processed in stop tab and is bent downwards Flange can ensure not interfering with the normal water inlet in filter core as stopper section, the stop tab of cross shape.

In above-mentioned backwash filter, as another technical solution, described location structure includes being fixed on clearly The iron plate washed in rod upper end and the magnet being arranged in filter core upper end, when sewage draining exit is closed, cleaning rod is inhaled under magneticaction It is attached on magnet.

When sewage draining exit is closed, the external and internal pressure of body is in poised state, and now cleaning rod is only by the inside of filter core upper end Magnet to the suction of iron plate.Cleaning rod can float under the magneticaction of magnet, and the upper end of cleaning rod is adsorbed in magnet On, so that cleaning rod can remain stationary as in normal filtration.

Compared with prior art, this backwash filter makes cleaning rod when rinsing by the cooperation of impeller and supporting construction Quick rotation is automatically formed, and the impurity on filter core and jelly are drawn into cleaning rod to realize punching in rotation process Wash, in flushing process caused by forced section agitation force and in negative pressure collective effect powerful caused by each sewage discharge tube, therefore The dirt-absorbing ability formed is stronger, so that developing result is more preferable, rinses also more thorough.

Brief description of the drawings

Fig. 1 is the schematic diagram of this backwash filter.

Fig. 2 is schematic diagram when this backwash filter embodiment one backwashes.

Fig. 3 is the schematic diagram of cleaning rod in this backwash filter embodiment one.

Fig. 4 is that another angles of Fig. 3 are schematic diagrames.

Fig. 5 is the schematic diagram of filter core in this backwash filter embodiment one.

Fiting relation figure when Fig. 6 is this backwash filter one normal filtration of embodiment between cleaning rod and baffle plate.

Fig. 7 is the schematic diagram of another angle of filter core in this backwash filter embodiment one.

In figure, 1, body；1a, housing；1a1, sewage draining exit；1b, top cover；1b1, water inlet；1b2, delivery port；2nd, filter core； 2a, apopore；2b, decontamination mouth；2c, dowel；2d, baffle plate；2d1, stop tab；2d11, stopper section；2e, positioning plush copper；3、 Tubular screen pack；4th, cleaning rod；4a, forced section；4a1, soil pick-up face；4a11, sewage discharge tube；4a12, blocking section；4a2, inclined plane； 4b, butting section；5th, impeller；5a, supporting table；5b, blade；6th, ball float；7th, cover plate；8th, Blowoff ball valve；9th, sealing ring.

Embodiment

It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these embodiments.

Embodiment one

As depicted in figs. 1 and 2, a kind of backwash filter, including the body being made up of housing 1a and top cover 1b, housing 1a upper end opens and top cover 1b are connected to housing 1a upper ends, and housing 1a inner chamber is sky, has water inlet 1b1 on top cover 1b and goes out Mouth of a river 1b2, water inlet 1b1 and delivery port the 1b2 intracavity inter-connection with housing 1a respectively, filter core 2, housing 1a are provided with housing 1a Lower end there is sewage draining exit 1a1 with housing 1a intracavity inter-connection, and Blowoff ball valve 8 is threaded with sewage draining exit 1a1, When in use, water inlet 1b1 taps into water pipe, delivery port 1b2 connected water outlet pipes, and blowoff valve connects blow-off pipe.

As shown in Fig. 2 filter core 2 is cylindrical, and is arranged with tubular screen pack 3 outside filter core 2, the upper end open of filter core 2, Top cover 1b inner side has a ring-type shoulder block, and ring-type shoulder block is resisted against the upper end of filter core 2, the upper end of ring-type shoulder block and filter core 2 it Between be provided with sealing ring 9, top cover 1b water inlet 1b1 and the intracavity inter-connection of filter core 2.The sidepiece of filter core 2 has circumferentially provided some Apopore 2a, housing 1a inner chamber are connected with the inner chamber of filter core 2 by apopore 2a, sewage draining exit 1a1 be located at filter core 2 just under Side, is provided with sealing ring 9 between the lower end outside of filter core 2 and housing 1a inwall.

As shown in Figure 2, Figure 3 and Figure 4, the cleaning rod 4 that can be rotated relative to filter core 2 is provided with filter core 2, cleaning rod 4 is in Hollow form, the lower ending opening of cleaning rod 4, and there are at least two forced section 4a in flat protrusion in the outside of cleaning rod 4, There are two inclined plane 4a2 and soil pick-up face 4a1 that two inclined plane 4a2 are connected on forced section 4a, two inclined plane 4a2 it Between protrusion direction of the distance along forced section 4a be gradually reduced, and provided at least along the axial direction of cleaning rod 4 on the 4a1 of soil pick-up face Two sewage discharge tubes 4a11, each sewage discharge tube 4a11 are in thin strip, forced section 4a shapes between two adjacent sewage discharge tube 4a11 Lateral surface into blocking section 4a12, and blocking section 4a12 lateral surface and forced section 4a is flush, in the present embodiment, blocking section 4a12 lateral surface is located on the 4a1 of soil pick-up face, and each sewage discharge tube 4a11 on one of forced section 4a is along the axial direction of cleaning rod 4 Mutually stagger with positions of each sewage discharge tube 4a11 on remaining forced section 4a along the axial direction of cleaning rod 4 position.The bottom wall of the inner chamber of filter core 2 On provide the decontamination mouth 2b being connected with sewage draining exit 1a1.Impeller 5 is fixed with the lower end of cleaning rod 4, and cleaning rod 4 uses Plastic material is made, and impeller 5 and cleaning rod 4 are integral type structure.

As shown in Figure 2 and Figure 7, in addition, in the present embodiment, having between the lower end of cleaning rod 4 and the bottom wall of the inner chamber of filter core 2 There is the supporting construction that can rotate cleaning rod 4.It is in cross dowel 2c that filter core 2, which has, dowel 2c each end and Decontamination mouth 2b inwall is connected, and impeller 5 includes supporting table 5a and some blade 5b circumferentially connected along supporting table 5a, support Structure includes raised positioning plush copper 2e from dowel 2c, and in backwash, positioning plush copper 2e is resisted against supporting table 5a lower ends At center, supporting table 5a lower surface is inner conical surface.When rinsing, moved down by cleaning rod 4 to make impeller 5 be resisted against convex On head 2e, cleaning rod 4 can be made to be rotated to position plush copper 2e as the center of circle, while the presence for positioning plush copper 2e causes cleaning rod Gap is formed between 4 bottom and the bottom wall of the inner chamber of filter core 2, this structure can prevent silt to be stuck in the bottom of cleaning rod 4 and filter Between the bottom wall of the inner chamber of core 2, ensure the normal rotation of cleaning rod 4.

As shown in Figure 5 and Figure 6, be provided between cleaning rod 4 and filter core 2 makes cleaning rod 4 stop turning when sewage draining exit 1a1 is closed Dynamic location structure.Location structure includes the ball float 6 being arranged in cleaning rod 4, the butting section being arranged on the outside of the upper end of cleaning rod 4 The 4b and stopper section 2d11 being arranged on the inside of the upper end of filter core 2.In the present embodiment, the upper end of cleaning rod 4 is connected with cover plate 7, The upper surface of filter core 2 has the baffle plate 2d of annular, and it is in cross stop tab 2d1 to have on the inside of baffle plate 2d, stopper section 2d11 is the flange that is bent downwards from stop tab 2d1, ball float 6 drive cleaning rod 4 to float in the case where being acted on without external force and make against The sidepiece of portion 4b sidepiece and stopper section 2d11 leans.

In normal filtration, blowoff valve is closed this backwash filter.Upper end and top cover 1b due to filter core 2 Between be provided with sealing ring 9, therefore the water in top cover 1b water inlet 1b1 can only enter in filter core 2.Then water passes through filter core 2 On apopore 2a and the tubular screen pack 3 that is set in outside filter core 2 filtered and entered in housing 1a inner chamber, due to Sealing ring 9 is provided between the lower end outside of filter core 2 and housing 1a inwall so that the water entered in housing 1a inner chamber is final It can only flow outwardly to come for users to use from the delivery port 1b2 on top cover 1b.

In normal filter process, because Blowoff ball valve 8 is closed, therefore blow-off pipe and the bottom of filter core 2 Decontamination mouth 2b is separated, can not be through the bottom of filter core 2 although water can be entered in cleaning rod 4 from the sewage discharge tube 4a11 on cleaning rod 4 The decontamination mouth 2b in portion and be flowed into blow-off pipe.This also means that now housing 1a inside and outside differential pressure is in poised state, cleaning Rod 4 only by this external force of the buoyancy of ball float 6, and cleaning rod 4 is maintained at floating state under the buoyancy of ball float 6, Under the state, the sidepiece of the sidepiece of the butting section 4b on the outside of the upper end of cleaning rod 4 and the stopper section 2d11 on filter core 2 leans, only Thus stopper 2d11 forms backstop to circumferentially rotating for cleaning rod 4, cleaning rod 4 is kept not during normal filtration It is dynamic.

Between when operating it is longer and, it is necessary to open blowoff valve when causing to be attached with more impurity and jelly on filter core 2 Filter core 2 is rinsed, to prevent filter effect to be affected.The detailed process of filter cartridge flushing 2 is such：Open blowdown Valve, blow-off pipe connect with the decontamination mouth 2b of the bottom of filter core 2, then when water enters cleaning from the sewage discharge tube 4a11 on cleaning rod 4 Directly it will be discharged to after in rod 4 by the decontamination mouth 2b of the bottom of filter core 2 in blow-off pipe.Water is entered in cleaning rod 4 and passed through During impeller 5, current can be impacted on the supporting table 5a of impeller 5, so that impeller 5 is forced downwards and with cleaning rod 4 one With moving down, thus cleaning rod 4 overcomes the buoyancy of ball float 6 and sunk, the butting section 4b on cleaning rod 4 and stopping on filter core 2 Stopper 2d11 is separated.

Cleaning rod 4 is moved down and made at the lower end center for the supporting table 5a that positioning plush copper 2e upper end is resisted against impeller 5, so One, cleaning rod 4 will be made to form quick rotation as the center of circle to position plush copper 2e when current pass through impeller 5 again.Due to clear The outside for washing rod 4 has the forced section 4a protruded in flat, and during cleaning rod 4 rotates, forced section 4a will can be cleaned Water between the outside of rod 4 and the inwall of filter core 2 stirs.It is connected simultaneously because the outside of cleaning rod 4 is provided with the inner chamber of cleaning rod 4 Logical sewage discharge tube 4a11, cleaning rod 4 will produce negative pressure at each sewage discharge tube 4a11 during rotation, that is, be formed by clear Wash the outer suction entered through sewage discharge tube 4a11 in cleaning rod 4 of rod 4.In being total to for agitation force caused by suction and forced section 4a Under same-action, adsorb the impurity on the inwall of filter core 2 and jelly is easy for be rinsed from filter core 2, and by inhaling Dirty mouth 4a11 is entered in cleaning rod 4, and is finally entered through decontamination mouth 2b and Blowoff ball valve 8 and flushing is realized in blow-off pipe.

After blowdown terminates, again closing Blowoff ball valve 8 separates blow-off pipe and the decontamination mouth 2b of the bottom of filter core 2, decontamination No longer produce outside draft at mouthful 2b, cleaning rod 4 floats and makes butting section 4b sidepiece again under the buoyancy of ball float 6 Sidepiece with stopper section 2d11 is again against thus cleaning rod 4 stops rotation.

This backwash filter passes through impeller 5 and the cooperation of the lower surface of the supporting table 5a on positioning plush copper 2e and impeller 5 Cleaning rod 4 is set to automatically form quick rotation when rinsing, and by forced section 4a and sewage discharge tube 4a11 in rotation process Collective effect and the impurity and jelly that will be attached on filter core 2 can be smoothly drawn into cleaning rod 4, improved well The developing result of filter core 2.Cleaning rod 4 can rotate completion automatically without operation and rinse in flushing process, therefore with operation more Add the advantages of facilitating.And for manually operated drive cleaning rod 4 rotates, 4 turns of the cleaning rod in this backwash filter Faster, the dirt-absorbing ability formed is stronger for dynamic speed, and flushing is more thorough, and acquired developing result is also more preferable.

Embodiment two

The present embodiment is essentially identical with the structure and principle of embodiment one, and difference is：In the present embodiment, position Structure includes the iron plate being fixed in the upper end of cleaning rod 4 and the magnet being arranged in the upper end of filter core 2, is closed in sewage draining exit 1a1 When cleaning rod 4 adsorbed under magneticaction on magnet.When sewage draining exit 1a1 is closed, the external and internal pressure of body is in poised state, Now suction of the cleaning rod 4 only by the magnet on the inside of the upper end of filter core 2 to iron plate.The meeting of cleaning rod 4 under the magneticaction of magnet Float, and the upper end of cleaning rod 4 is adsorbed on magnet, so that cleaning rod 4 can remain stationary as in normal filtration.

Embodiment three

The present embodiment is essentially identical with the structure and principle of embodiment one, and difference is：In the present embodiment, support Structure includes raised thimble from dowel 2c, and thimble sidepiece has convex shoulder, and in backwash, thimble passes through the center of impeller 5 Hole, and the lower end of impeller 5 is resisted against on convex shoulder and makes to form gap between the bottom wall of inner cavity of the bottom of cleaning rod 4 and filter core 2.

Due to having the thimble with the connecting hole face at the center of impeller 5 on dowel, then when sewage draining exit 1a1 is opened And after moving down cleaning rod 4, thimble can pass through connecting hole, simultaneously because having convex shoulder on thimble, then the bottom of impeller 5 It will be resisted against on convex shoulder, so that cleaning rod 4 is rotated by the center of circle of thimble, while the presence of convex shoulder causes cleaning rod 4 Bottom and the inner chamber of filter core 2 bottom wall between form certain gap, this structure can also prevent silt to be stuck in the bottom of cleaning rod 4 Between the bottom wall of portion and the inner chamber of filter core 2, cleaning rod 4 is improved while being rotated automatically to realize auto-flushing by cleaning rod 4 Smoothness during rotation.

Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.

Claims (10)

1. a kind of backwash filter, including body (1), there is water inlet (1b1), delivery port (1b2) and energy on body (1) The sewage draining exit (1a1) enough opened and closed, is provided with tubular filter core (2) in described body (1), the water inlet (1b1) of body (1) and Delivery port (1b2) is connected by filter core (2), the cleaning rod (4) with inner chamber is provided with described filter core (2), in cleaning rod (4) offer the sewage discharge tube (4a11) connected with the inner chamber of cleaning rod (4) on sidepiece, described filter core (2) bottom have with The decontamination mouth (2b) that sewage draining exit (1a1) is connected, described cleaning rod (4) lower ending opening and with decontamination mouth (2b) relatively, cleaning The outside of rod (4) has forced section (4a), it is characterised in that impeller (5) is provided with described cleaning rod (4), and in cleaning rod (4) cleaning rod (4) progress can be supported when current pass through impeller (5) by having between lower end and the bottom wall of filter core (2) inner chamber The supporting construction of rotation.

2. backwash filter according to claim 1, it is characterised in that described sewage discharge tube (4a11) is arranged at stress On the lateral surface in portion (4a), the quantity of described sewage discharge tube (4a11) at least two and each sewage discharge tube (4a11) along cleaning rod (4) axial direction arrangement, described forced section (4a) forms blocking section (4a12) between adjacent two sewage discharge tubes (4a11), and hinders The lateral surface of the lateral surface of compartment (4a12) and forced section (4a) is flush.

3. backwash filter according to claim 2, it is characterised in that the quantity of described forced section (4a) is at least Two, and position and remaining forced section of each sewage discharge tube (4a11) on one of forced section (4a) along cleaning rod (4) axial direction Mutually stagger position of each sewage discharge tube (4a11) along cleaning rod (4) axial direction on (4a).

4. the backwash filter according to Claims 2 or 3, it is characterised in that have two on described forced section (4a) Individual inclined plane (4a2) and the distance between the soil pick-up face (4a1), two inclined planes (4a2) that two inclined planes (4a2) are connected It is gradually reduced along the protrusion direction of forced section (4a), described sewage discharge tube (4a11) is located on soil pick-up face (4a1), and blocking section The lateral surface of (4a12) is located on soil pick-up face (4a1).

5. backwash filter according to claim 1, it is characterised in that described cleaning rod (4) uses plastic material It is made, and cleaning rod (4) and impeller (5) are integral type structure.

6. backwash filter according to claim 1, it is characterised in that described filter core (2) has dowel (2c), At least one end of dowel (2c) and the inwall of decontamination mouth (2b) are fixedly connected with, described impeller (5) include supporting table (5a) and Some blades (5b) circumferentially connected along supporting table (5a), described supporting construction are determined including raised from dowel (2c) Position plush copper (2e), the positioning plush copper (2e) described in backwash are resisted against at the center of supporting table (5a) lower end.

7. backwash filter according to claim 1, it is characterised in that described filter core (2) has dowel (2c), At least one end of dowel (2c) and the inwall of decontamination mouth (2b) are fixedly connected with, and described supporting construction is included from dowel (2c) Raised thimble, described thimble sidepiece have convex shoulder, and the thimble described in backwash passes through the centre bore of impeller (5), and The lower end of impeller (5) is resisted against on convex shoulder and makes to form gap between the bottom wall of inner cavity of cleaning rod (4) bottom and filter core (2).

8. backwash filter according to claim 1, it is characterised in that between described cleaning rod (4) and filter core (2) Provided with the location structure for making cleaning rod (4) stop operating when sewage draining exit (1a1) is closed.

9. backwash filter according to claim 8, it is characterised in that described location structure includes being arranged at cleaning Ball float (6) in rod (4), the butting section (4b) being arranged on the outside of cleaning rod (4) upper end and it is arranged on the inside of filter core (2) upper end Stopper section (2d11), when sewage draining exit (1a1) is closed cleaning rod (4) ball float (6) buoyancy float downward and make against The sidepiece of the sidepiece in portion (4b) and stopper section (2d11) leans.

10. backwash filter according to claim 9, it is characterised in that described filter core (2) upper surface has annulus The baffle plate (2d) of shape, it be in cross stop tab (2d1) to have on the inside of baffle plate (2d), described stopper section (2d11) for from The flange bent downwards in stop tab (2d1).