CN207102029U - Filter - Google Patents

Abstract

It the utility model is related to a kind of filter.The filter includes cylinder, filter screen and drive component；Feed tube and drain pipe are convexly equipped with the cylinder, the cylinder is interior to be also convexly equipped with mounting blocks formed with mixed liquid space, the side of the cylinder；The filter screen is coniform and is arranged on the cylinder that the filter screen part is convexly equipped in the mixed liquid space；The drive component includes rotary drive, lifting actuator and link, the rotary drive is installed on the mounting blocks, the lifting actuator is installed on the rotary drive, and the link is connected on the lifting actuator and is connected with the edge of the filter screen.The cleaning of the filter is more convenient.

Description

Filter

Technical field

It the utility model is related to a kind of filter.

Background technology

In the treatment process of liquid, it is often necessary to liquid is filtered using filter.For example, filter one As include cylinder and the filter screen that is arranged on the cylinder.The filter screen is generally cone barrel, formed with filter space in it, The bottom of the filter screen offers multiple filter bores.During filtering, liquid is flowed into the filter screen, via entering the cylinder after filtering In body.However, when filter net jam, manual cleaning filter screen is generally required, and needs to take measures to prevent described in pollutant entrance In cylinder, its prune job is more inconvenient.

Utility model content

Based on this, it is necessary to provide a kind of cleaning conveniently filter.

A kind of filter, including cylinder, filter screen and drive component；Feed tube is convexly equipped with the cylinder and goes out liquid Pipe, the cylinder is interior to be also convexly equipped with mounting blocks formed with mixed liquid space, the side of the cylinder；The filter screen is coniform and set It is placed on the cylinder, the filter screen part is convexly equipped in the mixed liquid space；The drive component includes rotary drive, risen Drop actuator and link, the rotary drive are installed on the mounting blocks, and the lifting actuator is installed on described On rotary drive, the link is connected on the lifting actuator and is connected with the edge of the filter screen.

In a wherein embodiment, the feed tube is convexly equipped in the top side of the cylinder, and the drain pipe is convex Located at the bottom side of the cylinder.

In a wherein embodiment, the bearing of trend of the feed tube is vertical with the bearing of trend of the drain pipe.

In a wherein embodiment, the diameter of the feed tube is more than the diameter of the drain pipe.

In a wherein embodiment, formed with feed pathway in the feed tube, formed with going out in the drain pipe Liquid passage, the diameter of the liquid storage passage are less than the diameter of the feed pathway.

In a wherein embodiment, the end side of the feed tube offers connector, and the connector is circle Shape mouth simultaneously connects with the feed pathway.

In a wherein embodiment, in addition to the protection collar, the protective case ring convex are described on the cylinder Filter screen is positioned at the bottom of the protection collar.

In a wherein embodiment, the protection collar be cone cylinder shape, and the protection collar is interior formed with entering liquid air Between, the link be convexly equipped in it is described enter liquid space in.

In a wherein embodiment, the link includes expansion link, cross bar and connecting rod, the expansion link connection In on the lifting actuator, the cross bar is laterally connected on the expansion link, and the both ends of the connecting rod are connected to On the cross bar and the filter screen.

In a wherein embodiment, the connecting rod be arranged in parallel with the expansion link, and the length of the connecting rod Length of the degree less than the expansion link.

When the filter net jam, the lifting actuator drives the link to rise, so as to utilize the link The filter screen is driven to depart from the cylinder, then the revolving part drives the lifting rotation part and link rotation, from And make it that the filter screen drives the filter screen to decline away from the cylinder, the last lifting actuator, and then the convenient people that works Member will not pollute the liquid in the cylinder so that the cleaning of the filter is more square in clearing up the filter screen outside cylinder Just.

Brief description of the drawings

Fig. 1 is the schematic perspective view of the filter of an embodiment.

Fig. 2 is the schematic perspective view of the filter screen of filter and drive component shown in Fig. 1.

Fig. 3 is the schematic perspective view of the supplied materials mechanism of an embodiment.

Embodiment

For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings State.Better embodiment of the present utility model is given in accompanying drawing.But the utility model can come in many different forms Realize, however it is not limited to embodiments described herein.On the contrary, the purpose for providing these embodiments is to make to this practicality newly The more thorough and comprehensive that the disclosure of type understands.

It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ", For illustrative purposes only, it is unique embodiment to be not offered as " right side " and similar statement.

Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model The implication that the technical staff in domain is generally understood that is identical.Term used herein is intended merely to describe specific embodiment Purpose, it is not intended that in limitation the utility model.Term as used herein " and/or " include one or more related institutes The arbitrary and all combination of list of items.

It the utility model is related to a kind of filter.For example, the filter includes cylinder, filter screen and driving group Part；Feed tube and drain pipe are convexly equipped with the cylinder, the cylinder is interior also convex formed with mixed liquid space, the side of the cylinder Provided with mounting blocks.For example, the filter screen is coniform and is arranged on the cylinder that the filter screen part is convexly equipped in the mixed liquid In space.For example, the drive component includes rotary drive, lifting actuator and link, the rotary drive peace Loaded on the mounting blocks, the lifting actuator is installed on the rotary drive.For example, the link is connected to institute State on lifting actuator and be connected with the edge of the filter screen.And for example, a kind of filter, including cylinder, filter screen and driving Component；Feed tube and drain pipe are convexly equipped with the cylinder, the cylinder is interior formed with mixed liquid space, and the side of the cylinder is also It is convexly equipped with mounting blocks.For example, the filter screen is coniform and is arranged on the cylinder, the filter screen part is convexly equipped in described mixed In liquid space.For example, the drive component includes rotary drive, lifting actuator and link, the rotary drive It is installed on the mounting blocks, the lifting actuator is installed on the rotary drive.For example, the link is connected to It is connected on the lifting actuator and with the edge of the filter screen.

Refer to Fig. 1 and Fig. 2, a kind of filter 100, including cylinder 10, filter screen 20 and drive component 30；The cylinder Feed tube 11 and drain pipe 12 are convexly equipped with body, is also convexly equipped with formed with mixed liquid space, the side of the cylinder in the cylinder Mounting blocks 14；The filter screen is coniform and is arranged on the cylinder that the filter screen part is convexly equipped in the mixed liquid space； The drive component includes rotary drive 31, lifting actuator 32 and link 33, the rotary drive and is installed on institute State on mounting blocks, the lifting actuator is installed on the rotary drive, and the link is connected to the lifting driving It is connected on part and with the edge of the filter screen.

For example, the filter is in use, by the external liquid line of the feed tube, by the drain pipe external hose, The first liquid is injected into the filter screen, first liquid enters in the cylinder via after the strainer filtering, passes through liquid Second liquid is injected the feed tube by body pipe, and second liquid enters in the cylinder to be mixed with first liquid, Ran Houjing The cylinder is flowed out by the drain pipe.When the filter net jam, the lifting actuator drives the link to rise, from And utilize the link to drive the filter screen to depart from the cylinder, then the revolving part drives the lifting rotation part and institute Link rotation is stated, so that the filter screen drives the filter screen to decline away from the cylinder, the last lifting actuator, And then staff is facilitated not pollute the liquid in the cylinder in clearing up the filter screen outside cylinder so that the filtering dress The cleaning put is more convenient.

For example, in order to prevent the first liquid from being overflowed from the edge of the filter screen, the feed tube is convexly equipped in the cylinder Top side, the drain pipe are convexly equipped in the bottom side of the cylinder.The bearing of trend of the feed tube and the drain pipe Bearing of trend it is vertical.The diameter of the feed tube is more than the diameter of the drain pipe.Lead in the feed tube formed with feed liquor Road 111, formed with liquid outlet channel in the drain pipe, the diameter of the liquid storage passage is less than the diameter of the feed pathway.Institute The end side for stating feed tube offers connector 112, and the connector is circular port and connected with the feed pathway.It is described Filter also includes the protection collar 40, and for the protective case ring convex on the cylinder, the filter screen is located at the protective case The bottom of ring.The protection collar is cone cylinder shape, and formed with liquid space 41 is entered in the protection collar, the link is convexly equipped in It is described enter liquid space in.Due to being provided with the protection collar on the cylinder, the filter screen is located at the bottom of the protection collar, because This can utilize the protection collar to prevent discharge body, so as to avoid the first liquid from being overflowed from the top edge of the filter screen.

For example, for the ease of setting the link, the link includes expansion link 331, cross bar 332 and connecting rod 333, the expansion link is connected on the lifting actuator, and the cross bar is laterally connected on the expansion link, the connection The both ends of bar are connected to the cross bar and on the filter screen, i.e., one end of described connecting rod is connected on the cross bar, institute The other end for stating connecting rod is connected on the filter screen.The connecting rod be arranged in parallel with the expansion link, and the connecting rod Length be less than the expansion link length.Because the link includes the expansion link, cross bar and the connecting rod that are sequentially connected, because This can be avoided the interference of link and the protection collar, and then make it that the setting of the link is more easy.

For example, for the ease of processing supplied materials, the filter also includes supplied materials mechanism, and the supplied materials mechanism includes filtering Component and grinding assembly, the filter assemblies are used for filtered fluid, and the grinding assembly is used in grinding liquid newly added Grain, the filter assemblies include supporting plate, multiple feeding cylinders and multiple conical filter cylinders.The multiple feeding cylinder is spaced Ground is installed in the supporting plate, and the multiple conical filter cylinder is respectively arranged in the bottom of the multiple feeding cylinder, for holding The liquid material in the feeding cylinder is connect, the grinding assembly includes sand cylinder, actuator and grinding frame, and the sand cylinder is set The grinding is arranged in the bottom of the multiple conical filter cylinder and with the spaced setting of the supporting plate, the actuator The top of cylinder, the grinding frame are arranged in the sand cylinder and are connected with the actuator, the side projection of the sand cylinder There is blowdown pipe, the blowdown pipe is used to export the liquid material after grinding into the feed pathway of the feed tube, described more The different setting of diameter of individual feeding cylinder, the number of the multiple feeding cylinder are 4, including the first feeding cylinder, the second feeding cylinder, the Three feeding cylinders and the 4th feeding cylinder, for accepting different liquid.It is first feeding cylinder, second feeding cylinder, described The internal diameter of 3rd feeding cylinder and the 4th feeding cylinder gradually reduces, and is penetrated in the supporting plate and offers multiple assembly holes, First feeding cylinder, the second feeding cylinder, the 3rd feeding cylinder and the 4th feeding cylinder are respectively arranged in the multiple assembly hole. The different setting of height of the multiple feeding cylinder, the multiple feeding cylinder are arranged at the top of the supporting plate, the multiple cone Shape cartridge filter is located at the bottom of the supporting plate, and the opposite sides of the supporting plate is convexly equipped with two and protrudes out plate respectively, and described two The individual end for protruding out plate is connected to the opposite sides of the sand cylinder, and the feeding assembly also includes both premix barrel, described pre- Mixed cylinder is arranged in first feeding cylinder, and is convexedly stretched at the top of the both premix barrel outside first feeding cylinder, described first The internal diameter of feeding cylinder, the internal diameter of second feeding cylinder, the internal diameter of the 3rd feeding cylinder and the 4th feeding cylinder it is interior Footpath edge is gradually reduced towards the direction of the sand cylinder.The grinding assembly also includes fixed mount, and the fixed mount is installed on institute The top of sand cylinder is stated, the actuator is installed on the fixed mount and positioned at the top of the sand cylinder, the grinding frame Including connecting pole and multiple abrasive sheets, the connecting pole is connected on the actuator, and the abrasive sheet is arranged at the connection The periphery of post, the abrasive sheet extending radially outwardly and being connected on the inside of the sand cylinder along the connecting pole, described The bottom of abrasive sheet forms multiple grinding holes, is convexly equipped with the side wall of the abrasive sheet formed with milling zone on the milling zone Multiple batch mixings are raised, the bottom of the abrasive sheet formed with grinding block, opposite sides of the grinding block along the abrasive sheet to Outer extension, the milling zone are formed at the bottom of the grinding block.The grinding block is held in the bottom of the sand cylinder.It is described Supplied materials hole is offered in the side wall of sand cylinder, the fixed mount includes fixed plate and two lifter plates, and the fixed plate is laterally set The top of the sand cylinder is placed in, described two lifter plates are respectively arranged at the opposite end of the fixed plate and are respectively positioned on described The outside of sand cylinder, described two lifter plates are vertical with the fixed plate, and the actuator is installed in the fixed plate, described The bottom of lifter plate is provided with sliding shoe, and the sliding shoe is slidably held on the lateral wall of the sand cylinder.The slip Formed with concave surface is slided on block, the slip concave surface and the surface of the lateral wall of the sand cylinder fit.Described in one of them Lifter plate gear sets the supplied materials hole.Receiving hole is offered on the lifter plate, the receiving hole is corresponding with the supplied materials hole to be communicated, The supplied materials mechanism also includes heating component, and the heating component includes cartridge heater and lifters, and the cartridge heater is arranged at institute State the bottom outside of sand cylinder and be used to drive the cartridge heater liter with the spaced setting of the sand cylinder, the lifters Drop.Multiple heat blocks are provided with the cartridge heater, the multiple heat block is electrically connected with the power supply.The bottom of the sand cylinder Bottoming hole is offered, the multiple heat block is convexly equipped in the multiple bottoming hole respectively.The surface of the heat block formed with Coarse heating surface, the coarse heating surface are concordant with the inside bottom surface of the sand cylinder.The grinding assembly also includes lifting air Cylinder, the lift cylinder are installed in the side wall of the sand cylinder, and the lift cylinder is connected with the fixed plate, the heating Cylinder includes chassis and sets ring with gear, and the gear sets the periphery that ring convex are located at the chassis, and the multiple heat block is convexly equipped in the bottom On disk, the chassis is attached on the bottom surface of the sand cylinder, and the gear sets ring and is slidably sheathed on the sand cylinder, described The internal diameter that gear sets ring is equal with the external diameter of the sand cylinder, lifting shaft is provided with the lifters, the chassis is installed on institute State on lifting shaft.Heating ring is convexly equipped with the chassis, the heating ring is electrically connected with the multiple heat block.The lifting Crown of roll is in the heating ring.By the setting of the both premix barrel, special material can be first mixed before filtering, and it is described Multiple conical filter cylinders can then improve the purity of various liquid before the milling.The grinding frame can then improve the sand cylinder Grinding efficiency.By setting the cartridge heater so that multiple heat blocks of the cartridge heater can be heated when protruding out, So that heating operation is more convenient, and the efficiency of heating surface is higher.

In order to describe the concrete structure and beneficial effect of the supplied materials mechanism in further detail, referring to Fig. 3, described next Expect that mechanism includes filter assemblies 51 and grinding assembly 52, the filter assemblies are used for filtered fluid, and the grinding assembly is used to grind The particle newly added in grinding fluid body.For example, the filter assemblies include supporting plate 511, multiple feeding cylinders and multiple tapers Filter cylinder.The multiple feeding cylinder is installed in the supporting plate spaced reciprocally, and the multiple conical filter cylinder is respectively arranged in The bottom of the multiple feeding cylinder, for accepting the liquid material in the feeding cylinder.For example, the grinding assembly includes grinding Cylinder 521, actuator 522 and grinding frame 523, the sand cylinder be arranged at the bottom of the multiple conical filter cylinder and with the branch The spaced setting of fagging.The sand cylinder is used to house the liquid flowed down from the multiple conical filter cylinder and accepted from outer The granular material that boundary is poured into, so as to which the liquid and the granular material are sufficiently mixed, the actuator is arranged at institute The top of sand cylinder is stated, the grinding frame is arranged in the sand cylinder and is connected with the actuator.The grinding frame is used for Granular material in grinding liquid, to improve mixture homogeneity.The side of the sand cylinder is convexly equipped with blowdown pipe 525, described Blowdown pipe can export the liquid material after grinding into the feed pathway of the feed tube.

For example, in order to be adapted with the proportioning of various liquid materials, the different setting of diameter of the multiple feeding cylinder.Example Such as, the number of the multiple feeding cylinder is 4, including the first feeding cylinder 5121, the second feeding cylinder 5122, the 3rd feeding cylinder 5123 and the 4th feeding cylinder 5124, for accepting different liquid.For example, first feeding cylinder, second feeding cylinder, The internal diameter of 3rd feeding cylinder and the 4th feeding cylinder gradually reduces.For the ease of installing the multiple feeding cylinder, institute State insertion in supporting plate and offer multiple assembly holes, first feeding cylinder, the second feeding cylinder, the 3rd feeding cylinder and the 4th enter Barrel is respectively arranged in the multiple assembly hole.For example, the different setting of the height of the multiple feeding cylinder, to adapt to different height The entrance of the liquid supplied materials of degree.For example, the multiple feeding cylinder is arranged at the top of the supporting plate, the multiple conical filter Cylinder is located at the bottom of the supporting plate, and the feeding cylinder can guide to be carried out in conical filter cylinder corresponding to liquid material entrance Filter operation.For example, for the ease of the fixation supporting plate and the relative position of the sand cylinder, the opposite sides of the supporting plate Two are convexly equipped with respectively and protrudes out plate 513, and described two ends for protruding out plate are connected to the opposite sides of the sand cylinder, example Such as, one of them one end for protruding out plate is connected to the side of the sand cylinder, and another one end for protruding out plate is connected to described grind The opposite side of mill tube, so as to which the supporting plate is fixed on the sand cylinder, and then cause the multiple conical filter Cylinder is directed at the sand cylinder, and is not easy to deviate.

For example, in order to be pre-mixed a kind of liquid, the feeding assembly also includes both premix barrel, and the both premix barrel is arranged at institute State in the first feeding cylinder, and convexedly stretched at the top of the both premix barrel outside first feeding cylinder.For example, in order to adapt to the need of process Will, can add the first liquid in the both premix barrel, wall flow of the second liquid along first feeding cylinder, the first liquid from The bottom of the both premix barrel is flowed out in first feeding cylinder, and is mixed with the second liquid, then again by corresponding Just enter after the filtering of conical filter cylinder in the sand cylinder.For example, for the ease of being adapted with corresponding conical filter cylinder, it is described The internal diameter of first feeding cylinder, the internal diameter of second feeding cylinder, the internal diameter of the 3rd feeding cylinder and the 4th feeding cylinder Internal diameter along being gradually reduced towards the direction of the sand cylinder.

For example, for the ease of installing the actuator, the grinding assembly also includes fixed mount 524, the fixed mount peace Top loaded on the sand cylinder, the actuator is installed on the fixed mount and positioned at the top of the sand cylinder, described Grinding frame includes connecting pole and multiple abrasive sheets, and the connecting pole is connected on the actuator, and the abrasive sheet is arranged at institute State the periphery of connecting pole, the inside that extends radially outwardly and be connected to the sand cylinder of the abrasive sheet along the connecting pole On, the bottom of the abrasive sheet forms multiple grinding holes formed with milling zone on the milling zone, in the side wall of the abrasive sheet It is raised to be convexly equipped with multiple batch mixings, by setting the grinding hole raised with the multiple batch mixing, the grinding frame can be improved Grinding efficiency, and batch mixing projection can improve compounding effect.For example, in order to improve grinding efficiency, the abrasive sheet Bottom stretches out formed with grinding block, opposite sides of the grinding block along the abrasive sheet, and the milling zone is formed at institute State the bottom of grinding block.The grinding block is held in the bottom of the sand cylinder.

For example, entering the sand cylinder for the ease of conveying granular material, offer and in the side wall of the sand cylinder Expect hole, the fixed mount includes fixed plate 5241 and two lifter plates 5242, the fixed plate are horizontally set at the sand cylinder Top, described two lifter plates be respectively arranged at the opposite end of the fixed plate and positioned at the sand cylinder outside, institute State that two lifter plates are vertical with the fixed plate, and the actuator is installed in the fixed plate, the bottom of the lifter plate is set Sliding shoe 5243 is equipped with, the sliding shoe is slidably held on the lateral wall of the sand cylinder.On the sliding shoe formed with Concave surface is slided, the slip concave surface and the surface of the lateral wall of the sand cylinder fit.One of them described lifter plate gear is set The supplied materials hole.For example, entering for the ease of conveying granular material in the sand cylinder, undertaking is offered on the lifter plate Hole, the receiving hole is corresponding with the supplied materials hole to be communicated, so as to allow granular material via the receiving hole and it is described come Expect that hole enters in the sand cylinder.

For example, after grinding, in order to realize the heating to the material in the sand cylinder, to improve liquid material Degree of mixing, the supplied materials mechanism also include heating component 53, and the heating component includes cartridge heater 531 and lifters 533, institute Cartridge heater is stated to be arranged at the bottom outside of the sand cylinder and be used to drive with the spaced setting of the sand cylinder, the lifters The dynamic cartridge heater lifting.For example, multiple heat blocks 534 are provided with the cartridge heater, the multiple heat block and power supply electricity Property connection.The bottom of the sand cylinder offers bottoming hole, and the multiple heat block is convexly equipped in the multiple bottoming hole respectively. The surface of the heat block is concordant with the inside bottom surface of the sand cylinder formed with coarse heating surface, the coarse heating surface.Institute The grinding of the grinding frame can be coordinated to improve the grinding efficiency of the grinding frame by stating coarse heating surface.For example, in order to coordinate Heating, the grinding assembly also include lift cylinder, and the lift cylinder is installed in the side wall of the sand cylinder, the lifting Cylinder is connected with the fixed plate, and after the grinding frame is ground, the lift cylinder drives institute by the fixed plate Two lifter plate movements are stated, so that the actuator and bottom surface of the grinding frame away from the sand cylinder, now described Lifters drive the cartridge heater to move up, so that the multiple heat block protrudes from the bottoming hole, it is described to add Hot block generates heat and the liquid after grinding is heated or is incubated, so as to improve the temperature of the liquid.Further, since now The lift cylinder drives the lifter plate movement, hence in so that the receiving hole on the expansion link on the sand cylinder with coming Material hole is staggered, so as to block the supplied materials hole, to prevent granular material from squeezing into the sand cylinder.

For example, for the ease of being sheathed on the bottom of the sand cylinder, the cartridge heater includes chassis 5311 and sets ring with gear 5313, the gear sets the periphery that ring convex are located at the chassis, and the multiple heat block is convexly equipped on the chassis, the chassis patch On the bottom surface of the sand cylinder, the gear sets ring and is slidably sheathed on the sand cylinder, it is described keep off set the internal diameter of ring with The external diameter of the sand cylinder is equal, so that the gear sets ring and successfully can slided on the sand cylinder.The lifting Lifting shaft is provided with part, the chassis is installed on the lifting shaft.For example, for the ease of the heating of the heating block, institute State and heating ring is convexly equipped with chassis, the heating ring is electrically connected with the multiple heat block.The lifting shaft is convexly equipped in described Heat in ring.

Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope that this specification is recorded all is considered to be.

Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed Carefully, but the limitation to the utility model patent scope therefore can not be interpreted as.It should be pointed out that for the general of this area For logical technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these are all Belong to the scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.

Claims (10)

1. a kind of filter, it is characterised in that including cylinder, filter screen and drive component；

Feed tube and drain pipe are convexly equipped with the cylinder, the cylinder is interior formed with mixed liquid space, and the side of the cylinder is also It is convexly equipped with mounting blocks；

The filter screen is coniform and is arranged on the cylinder that the filter screen part is convexly equipped in the mixed liquid space；

The drive component includes rotary drive, lifting actuator and link, and the rotary drive is installed on described On mounting blocks, the lifting actuator is installed on the rotary drive, and the link is connected to the lifting actuator Above and with the edge of the filter screen it is connected.

2. filter according to claim 1, it is characterised in that the feed tube is convexly equipped in the top one of the cylinder Side, the drain pipe are convexly equipped in the bottom side of the cylinder.

3. filter according to claim 2, it is characterised in that the bearing of trend of the feed tube and the drain pipe Bearing of trend it is vertical.

4. filter according to claim 3, it is characterised in that the diameter of the feed tube is more than the drain pipe Diameter.

5. filter according to claim 4, it is characterised in that described formed with feed pathway in the feed tube Formed with liquid outlet channel in drain pipe, the diameter of the liquid outlet channel is less than the diameter of the feed pathway.

6. filter according to claim 5, it is characterised in that the end side of the feed tube offers connection Mouthful, the connector is circular port and connected with the feed pathway.

7. filter according to claim 1, it is characterised in that also include the protection collar, the protective case ring convex are set In on the cylinder, the filter screen is positioned at the bottom of the protection collar.

8. filter according to claim 7, it is characterised in that the protection collar is cone cylinder shape, the protective case Formed with entering liquid space in ring, the link be convexly equipped in it is described enter liquid space in.

9. filter according to claim 1, it is characterised in that the link includes expansion link, cross bar and connection Bar, the expansion link are connected on the lifting actuator, and the cross bar is laterally connected on the expansion link, the connecting rod Both ends be connected on the cross bar and the filter screen.

10. filter according to claim 9, it is characterised in that the connecting rod be arranged in parallel with the expansion link, And the length of the connecting rod is less than the length of the expansion link.