CN221333014U - Waste water filter with collection structure - Google Patents

Abstract

The utility model discloses a waste water filter with a collecting structure, which relates to the technical field of waste water filtration, and comprises a filter body, wherein the upper end of the filter body is communicated with a water inlet pipe, one side of the bottom end of the filter body is communicated with a water outlet pipe, a filter screen plate is fixedly arranged in the filter body, the bottom ends of two sides of the filter screen plate are respectively and closely provided with a collecting box, the bottom ends of the collecting boxes are respectively and symmetrically provided with a guide groove rod in a sliding manner, the upper end of the filter screen plate is provided with a pushing mechanism, and the inside of the filter body is provided with an extruding mechanism.

Description

Waste water filter with collection structure

Technical Field

The utility model relates to the technical field of wastewater filtration, in particular to a wastewater filter with a collecting structure.

Background

In order to prevent that the pollutant contained in waste water from causing harm to human health or environment, only can discharge the waste water after the waste water is treated, the prior waste water treatment system adopts a series of waste water purification treatment devices to carry out one-step purification treatment on the waste water, before the waste water is subjected to fine treatment, the waste water treatment filtering device is required to be used for removing large-volume impurities contained in the waste water, the prior waste water treatment filtering device adopts a mode that one end enters water and one end goes out of water to filter, impurities can remain at a filter screen, the phenomenon of blocking is easy to occur, thereby reducing the filtering effect, and when the waste water treatment system is used, the filtered impurities and garbage cannot be uniformly collected, frequent shutdown is required, the impurities are cleaned through manual operation, the operation process is time-consuming and labor-consuming, and the labor intensity of staff is greatly increased.

The utility model patent of China with the bulletin number of CN220385946U discloses a water conservancy and environment-friendly wastewater filter, the filter can realize unified collection and storage of filtered impurities and garbage, but when the device is used, the electric push rod is inconvenient to control the pressing time, if impurities in a collecting box are pressed down in the filtering process, impurities on a first filtering mechanism and a second filtering mechanism can fall on the upper end of a pressing plate, and the impurities at the upper end of the pressing plate are inconvenient to discharge because the periphery of the pressing plate is slidably arranged in the collecting box, and the collecting box is internally provided with only a pressure bearing plate for discharging wastewater in the collecting box, and when the pressing plate compacts impurities and garbage at the upper end of the pressure bearing plate, the through holes at the upper end of the pressure bearing plate are blocked, so that the wastewater in the collecting box can not be discharged when the pressing plate is pressed down again, the impurities and garbage in the collecting box are inconvenient to be pressed again, and the device has larger limitation when in use.

Based on this, now provide a waste water filter with collect structure, can eliminate the drawback that current device exists.

Disclosure of utility model

The utility model aims to provide a wastewater filter with a collecting structure, which solves the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides a waste water filter with collection structure, includes the filter body, filter body upper end intercommunication is equipped with the inlet tube, filter body bottom one side intercommunication is equipped with the outlet pipe, be equipped with the valve on the outlet pipe, the inside fixed filter screen that is equipped with of filter body, the filter screen both sides bottom is all hugged closely and is equipped with the collecting box, the equal symmetrical slip of collecting box bottom is equipped with the guide way pole, the guide way pole is fixed to be established inside the filter body, the filter screen upper end is equipped with and is used for pushing the inside pushing mechanism of collecting box with filter screen upper end impurity, the inside upper end of filter body corresponds the department with the collecting box position and is equipped with the extrusion mechanism that is used for sticis to the inside impurity of collecting box.

Based on the technical scheme, the utility model also provides the following optional technical schemes:

In one alternative: the pushing mechanism comprises a scraping rod, the bottom end of the scraping rod is clung to the upper end of the filter screen plate, a first fixing plate and a second fixing plate are fixedly arranged at the upper end of the scraping rod respectively, the first fixing plate and the second fixing plate are symmetrically arranged, a guide sliding rod is arranged in a second fixing plate one side installation hole in a sliding mode, the guide sliding rod is fixedly arranged in the filter body, a reciprocating screw rod is arranged in a screw hole on one side of the first fixing plate, two ends of the reciprocating screw rod are rotatably arranged in an installation hole on the inner side of the filter body, and a driving assembly used for driving the reciprocating screw rod to rotate is arranged in the filter body.

In one alternative: the driving assembly comprises an impeller, the impeller is arranged inside the filter body, rotating shafts at two ends of the impeller are rotatably arranged in mounting holes at the inner side of the filter body, a plurality of blades on the impeller are aligned with one end of the water inlet pipe, and a driving wheel on the rotating shaft at one end of the impeller is in transmission connection with a driven wheel on the rotating shaft at one end of the reciprocating screw rod through a belt.

In one alternative: the utility model discloses a filter, including the scraper blade, brush roll, friction wheel, friction plate, brush roll both ends axis of rotation, brush roll one side symmetry is equipped with the backup pad, backup pad one side all is equipped with the mounting hole, two rotate between the backup pad is equipped with the brush roll, the rotation of brush roll both ends axis of rotation is established in two backup pad one side mounting holes, fixed a plurality of brush hair that is equipped with on the brush roll, all be fixed in the rotation axis of brush roll both ends and be equipped with the friction wheel, all friction is equipped with the friction plate on the friction wheel, two the friction plate is fixed respectively and is established in the inside both sides of filter body.

In one alternative: the extrusion mechanism comprises pressing plates, two pressing plates are respectively matched with the positions above two collecting boxes, the upper ends of the pressing plates are respectively fixedly connected with the output ends of a first spring telescopic rod and two second spring telescopic rods, the first spring telescopic rod and the two second spring telescopic rods are respectively fixedly arranged at the bottom ends of mounting plates, the mounting plates are respectively fixedly connected with the output ends of a first electric push rod and a second electric push rod, the first electric push rod and the second electric push rod are respectively fixedly arranged at the upper end inside a filter body, a first travel switch and a second travel switch are respectively fixedly arranged at the positions corresponding to the two sides of a first fixing plate on one side inside the filter body, the first travel switch and the second travel switch are respectively and electrically connected with the first electric push rod and the second electric push rod, the first travel switch is fixedly arranged at the position corresponding position of the inner side of the filter body close to the second electric push rod, and the second travel switch is fixedly arranged at the position corresponding position of the inner side of the filter body close to the first electric push rod.

In one alternative: the button is fixed to the inside upper end of first spring telescopic link, button and outside control part electric connection.

In one alternative: the inside bottom of collecting box and length direction both sides all are equipped with a plurality of circular filtration pore.

In one alternative: the filter is characterized in that a limiting plate is arranged at the position corresponding to the position of the collecting box on one side of the filter body, a fixed column is rotatably arranged at one end of the limiting plate, and the fixed column is fixedly arranged on one side of the filter body.

Compared with the prior art, the utility model has the following beneficial effects:

1. According to the utility model, the collecting boxes are arranged at the bottom ends of the two sides of the filter screen in a clinging manner, the impellers are arranged at the inner part of the filter body and one end of the water inlet pipe, so that when the water inlet pipe conveys waste water into the filter body, the impellers are impacted by the waste water, the impellers drive the reciprocating screw rods to rotate through the belts, the reciprocating screw rods drive the scraping rods to reciprocate along the axial direction of the guide slide rods, so that impurities at the upper ends of the filter screen are pushed into the two collecting boxes to be collected and stored, meanwhile, when the scraping rods move, the scraping rods drive the brush rolls to move, friction wheels at the two ends of the brush rolls are in friction fit with the friction plates, so that the brush rolls rotate, the upper ends of the filter screen can be cleaned when the brush rolls follow the scraping rods to prevent the filter screen from being blocked, and meanwhile, when the scraping rods drive the first fixed plate to touch the second travel switch far away from the second electric push rod, the output end of the second electric push rod drives the pressing plate to extrude the impurities in the collecting boxes, and therefore, the problem that the impurities fall on the upper ends of the pressing plate is not convenient to discharge is solved.

2. According to the utility model, the two sides of the bottom end of the inside of the collecting box are respectively provided with the plurality of circular filtering holes, so that when the impurities in the collecting box are increased and the impurities in the collecting box are extruded by the pressing plate, the waste water in the collecting box is conveniently discharged, the problem that the waste water in the collecting box is inconvenient to discharge is solved, and meanwhile, when the impurities in the collecting box are excessively stored by arranging the button at one end of the inside of the first spring telescopic rod, a worker can be timely informed of replacing the collecting box or treating the impurities in the collecting box, so that the practicability of the waste water filter is improved.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic diagram of the internal structure of the filter body of the present utility model.

Fig. 3 is a schematic view of the button installation of the present utility model.

Fig. 4 is a schematic diagram of the installation of the first and second travel switches of the present utility model.

FIG. 5 is a schematic view of the friction wheel and friction plate installation of the present utility model.

Reference numerals annotate: the filter comprises a filter body 11, a water inlet pipe 12, a water outlet pipe 13, a filter screen plate 14, a collecting box 15, a guide groove rod 16, a scraping rod 17, a reciprocating screw rod 18, a guide sliding rod 19, a brush roll 20, a friction wheel 21, a friction plate 22, an impeller 23, a pressing plate 24, a first spring telescopic rod 25, a second spring telescopic rod 26, a button 27, a first electric push rod 28, a second electric push rod 29, a first travel switch 30, a second travel switch 31 and a limiting plate 32.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

Example 1

In one embodiment, as shown in fig. 1-5, a wastewater filter with a collecting structure comprises a filter body 11, wherein the upper end of the filter body 11 is communicated with a water inlet pipe 12, one side of the bottom end of the filter body 11 is communicated with a water outlet pipe 13, a valve is arranged on the water outlet pipe 13, a filter screen plate 14 is fixedly arranged in the filter body 11, the bottom ends of two sides of the filter screen plate 14 are respectively and tightly attached to a collecting box 15, the bottom ends of the collecting boxes 15 are symmetrically and slidingly provided with guide groove rods 16, the guide groove rods 16 are fixedly arranged in the filter body 11, a pushing mechanism for pushing impurities at the upper end of the filter screen plate 14 into the collecting boxes 15 is arranged at the upper end of the filter screen plate 14, an extruding mechanism for compacting the impurities in the collecting boxes 15 is arranged at the position corresponding to the upper end of the inner part of the filter body 11, the impurities filtered at the upper end of the filter screen plate 14 are conveniently pushed into the inner parts of the collecting boxes 15 by the pushing mechanism, the extruding mechanism is convenient for extruding wastewater in the impurities in the collecting boxes 15;

The pushing equipment includes scraper 17, scraper 17 bottom and filter screen 14 upper end are hugged closely, scraper 17 upper end is fixed respectively and is equipped with first fixed plate and second fixed plate, first fixed plate is the symmetry setting with the second fixed plate, second fixed plate one side mounting hole inside slip is equipped with direction slide bar 19, direction slide bar 19 is fixed to be established inside filter body 11, be equipped with reciprocating screw 18 in the first fixed plate one side wire hole, reciprocating screw 18 both ends rotate and establish in filter body 11 inboard mounting hole, filter body 11 inside is equipped with and is used for driving reciprocating screw 18 pivoted actuating assembly, during the use, inlet tube 12 one end and outside water supply part output intercommunication, outside water supply part carries waste water to filter body 11 inside through inlet tube 12, and waste water drops in filter screen 14 upper end, and filter screen 14 filters waste water, and impurity in the waste water is filtered at filter screen 14 upper end, and then drives reciprocating screw 18 through actuating assembly and rotates, and reciprocating screw 18 drives scraper 17 along direction slide bar 17 along the direction of direction slide bar, thereby pushes into two filter screen 14 inside to scrape scraper plate 17 and is collected to the inside and is scraped to filter screen 14 because of the inside scraper 17.

The driving assembly comprises an impeller 23, the impeller 23 is arranged inside the filter body 11, rotating shafts at two ends of the impeller 23 are rotatably arranged in mounting holes on the inner side of the filter body 11, a plurality of blades on the impeller 23 are aligned with one end of the water inlet pipe 12, a driving wheel on one end of the rotating shaft of the impeller 23 is in transmission connection with a driven wheel on one end of the rotating shaft of the reciprocating screw 18 through a belt, and when the driving assembly is used, an external water supply part is used for conveying wastewater to the inside of the filter body 11 through the water inlet pipe 12, the wastewater impacts the blades on the impeller 23, so that the impeller 23 rotates, and the impeller 23 drives the reciprocating screw 18 to rotate through the driving wheel, the belt and the driven wheel.

The extrusion mechanism comprises a pressing plate 24, two pressing plates 24 are respectively matched and arranged at positions corresponding to the positions above two collecting boxes 15, the upper ends of the pressing plates 24 are respectively fixedly connected with the output ends of a first spring telescopic rod 25 and two second spring telescopic rods 26, the first spring telescopic rod 25 and the two second spring telescopic rods 26 are respectively fixedly arranged at the bottom ends of mounting plates, the two mounting plates are respectively fixedly connected with the output ends of a first electric push rod 28 and a second electric push rod 29, the first electric push rod 28 and the second electric push rod 29 are respectively fixedly arranged at the upper ends inside the filter body 11, a first travel switch 30 and a second travel switch 31 are respectively fixedly arranged at positions corresponding to the positions of two sides of a first fixing plate on one side inside the filter body 11, the first travel switch 30 and the second travel switch 31 are respectively electrically connected with the first electric push rod 28 and the second electric push rod 29, the first travel switch 30 is fixedly arranged at the position corresponding to the second electric push rod 29 on one side inside the filter body 11, the second travel switch 31 is fixedly arranged at the position corresponding to the first electric push rod 28 on one side inside the filter body 11, when the scraper 17 drives the first fixing plate to move to one end of the filter screen plate 14 near the first electric push rod 28, the first fixing plate touches the second travel switch 31, so that the second travel switch 31 controls the second electric push rod 29 to start, the output end of the second electric push rod 29 drives the first spring telescopic rod 25 and the two second spring telescopic rods 26 to move through the mounting plate, the first spring telescopic rod 25 and the second spring telescopic rod 26 drive the pressing plate 24 to move, thereby extruding impurities inside the collecting box 15, discharging waste water in the impurities, meanwhile, return springs are arranged inside the first spring telescopic rod 25 and the second spring telescopic rod 26, so that when impurities inside the collecting box 15 are increased, the output ends of the first spring telescopic rod 25 and the second spring telescopic rod 26 can move according to the thickness of the impurities inside the collecting box 15, otherwise, when the scraping rod 17 drives the first fixing plate to move to one end of the filter screen 14 close to the position of the second electric push rod 29, the first fixing plate touches the first travel switch 30, the first travel switch 30 controls the first electric push rod 28 to start, and the output end of the first electric push rod 28 can extrude the impurities inside the collecting box 15 through the pressing plate 24.

The button 27 is fixed to the inside upper end of first spring telescopic link 25, button 27 and external control part electric connection, during the use, deposit impurity more when collection box 15 is inside, and when need clear up, second electric putter 29 and first electric putter 28 output promote the mounting panel and remove, clamp plate 24 extrudees impurity, first spring telescopic link 25 and second spring telescopic link 26 output slide to inside first spring telescopic link 25 and the second spring telescopic link 26 simultaneously, when first spring telescopic link 25 output one end extrudees button 27, because button 27 and external control part electric connection to inform the staff to change collection box 15 or clear up collection box 15 inside impurity.

The inside bottom of collecting box 15 and length direction both sides all are equipped with a plurality of circular filtration pore, and during the use, the clamp plate 24 of being convenient for extrudees the inside impurity of collecting box 15 to with the inside waste water discharge of collecting box 15.

The filter body 11 one side all is equipped with limiting plate 32 with collecting box 15 position department that corresponds, limiting plate 32 one end rotates and is equipped with the fixed column, the fixed column is fixed to be established in filter body 11 one side, during the use, pushes into the inside back of filter body 11 with collecting box 15, makes limiting plate 32 one side and collecting box 15 one side hug closely to fix collecting box 15, make collecting box 15 upper end and clamp plate 24 align.

Example 2

The difference from example 1 is that: the utility model discloses a filter screen 14, including the scraper blade 17, the scraper blade 17 is equipped with the backup pad, backup pad one side all is equipped with the mounting hole, two the rotation is equipped with brush roll 20 between the backup pad, brush roll 20 both ends axis of rotation is established in two backup pad one side mounting holes, fixed a plurality of brush hair that is equipped with on the brush roll 20, all be equipped with friction pulley 21 in the axis of rotation of brush roll 20 both ends, all friction is equipped with friction plate 22 on the friction pulley 21, two friction plate 22 are fixed respectively and are established in the inside both sides of filter body 11, during the use, when scraper blade 17 moves along direction slide bar 19, scraper blade 17 drives brush roll 20 and moves, brush roll 20 both ends friction pulley 21 and brush roll 20 friction fit to make brush roll 20 rotate, can clear up filter screen 14 upper end when brush roll 20 rotates, thereby prevent that filter screen 14 from being blocked.

The above embodiment discloses a wastewater filter with a collecting structure, wherein an external water supply part conveys wastewater to the inside of a filter body 11 through a water inlet pipe 12, the wastewater impacts vanes on an impeller 23, so that the impeller 23 rotates, the impeller 23 drives a reciprocating screw 18 to rotate through a driving wheel, a belt and a driven wheel, the reciprocating screw 18 drives a scraper 17 to reciprocate along the axial direction of a guide slide bar 19 through a first fixing plate, the scraper 17 pushes impurities at the upper end of the filter screen 14 into two collecting boxes 15 for collection due to the fact that the bottom end of the scraper 17 is tightly attached to the upper end of the filter screen 14, meanwhile, the scraper 17 drives a brush roll 20 to move, friction wheels 21 at the two ends of the brush roll 20 are in friction fit with the brush roll 20, so that the brush roll 20 rotates, the upper end of the filter screen 14 can be cleaned when the brush roll 20 rotates, and the filter screen 14 is prevented from being blocked, when the scraping rod 17 drives the first fixing plate to move to the end of the filter screen 14 close to the position of the first electric push rod 28, the first fixing plate touches the second travel switch 31, so that the second travel switch 31 controls the second electric push rod 29 to start, the output end of the second electric push rod 29 drives the first spring telescopic rod 25 and the two second spring telescopic rods 26 to move through the mounting plate, the first spring telescopic rod 25 and the second spring telescopic rod 26 drive the pressing plate 24 to move, so as to squeeze impurities in the collecting box 15, so that waste water in the impurities is discharged, and meanwhile, return springs are arranged in the first spring telescopic rod 25 and the second spring telescopic rod 26, so that when the impurities in the collecting box 15 are increased, the output ends of the first spring telescopic rod 25 and the second spring telescopic rod 26 can move according to the thickness of the impurities in the collecting box 15, otherwise, when the scraping rod 17 drives the first fixed plate to move to one end of the filter screen 14 close to the position of the second electric push rod 29, the first fixed plate touches the first travel switch 30, so that the first travel switch 30 controls the first electric push rod 28 to start, the output end of the first electric push rod 28 can extrude impurities inside the collecting box 15 through the pressing plate 24, the plurality of round filtering holes are formed in two sides of the filter screen 14, so that waste water inside the collecting box 15 can be discharged when impurities inside the collecting box 15 are increased, when the impurities are stored in the collecting box 15 more, and cleaning is needed, the second electric push rod 29 and the output end of the first electric push rod 28 push the mounting plate to move, the pressing plate 24 extrudes the impurities, meanwhile, the output ends of the first spring telescopic rod 25 and the second spring telescopic rod 26 slide to the inside the first spring telescopic rod 25 and the second spring telescopic rod 26, when one end of the output end of the first spring telescopic rod 25 extrudes the button 27, the button 27 is electrically connected with an external control part, and therefore workers are informed of replacing the collecting box 15 or cleaning one end of the collecting box 15, and the workers rotate the plate 32 are separated from the limiting plate, and then the collecting box 15 is replaced or the collecting box 15 is cleaned, and the impurities are removed, and the collecting box 15 is replaced.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (8)

1. The utility model provides a waste water filter with collection structure, includes filter body (11), filter body (11) upper end intercommunication is equipped with inlet tube (12), filter body (11) bottom one side intercommunication is equipped with outlet pipe (13), be equipped with the valve on outlet pipe (13), filter body (11) inside is fixed to be equipped with filter screen plate (14), a serial communication port, filter screen plate (14) both sides bottom is all hugged closely and is equipped with collecting box (15), collecting box (15) bottom all symmetry slides and is equipped with guide way pole (16), guide way pole (16) are fixed to be established inside filter body (11), filter screen plate (14) upper end is equipped with and is used for pushing the pushing mechanism of filter screen plate (14) upper end impurity inside collecting box (15), filter body (11) inside upper end is equipped with the extrusion mechanism that is used for sticis carried out to collecting box (15) inside impurity with the corresponding department in collecting box (15) position.

2. The wastewater filter with the collection structure according to claim 1, wherein the pushing mechanism comprises a scraping rod (17), the bottom end of the scraping rod (17) is tightly attached to the upper end of the filter screen plate (14), a first fixing plate and a second fixing plate are respectively and fixedly arranged at the upper end of the scraping rod (17), the first fixing plate and the second fixing plate are symmetrically arranged, a guide sliding rod (19) is slidably arranged in a mounting hole on one side of the second fixing plate, the guide sliding rod (19) is fixedly arranged in the filter body (11), a reciprocating screw rod (18) is arranged in a screw hole on one side of the first fixing plate, two ends of the reciprocating screw rod (18) are rotatably arranged in a mounting hole on the inner side of the filter body (11), and a driving assembly for driving the reciprocating screw rod (18) to rotate is arranged in the filter body (11).

3. The wastewater filter with the collection structure according to claim 2, wherein the driving assembly comprises an impeller (23), the impeller (23) is arranged inside the filter body (11), rotating shafts at two ends of the impeller (23) are rotatably arranged in mounting holes on the inner side of the filter body (11), a plurality of blades on the impeller (23) are aligned with one end of the water inlet pipe (12), and a driving wheel on one end of the rotating shaft of the impeller (23) is in transmission connection with a driven wheel on the rotating shaft at one end of the reciprocating screw (18) through a belt.

4. The wastewater filter with the collection structure according to claim 2, wherein the scraping rods (17) are symmetrically provided with support plates on one side, mounting holes are formed in one side of each support plate, brush rolls (20) are rotatably arranged between the two support plates, rotating shafts at two ends of each brush roll (20) are rotatably arranged in the mounting holes on one side of each support plate, a plurality of bristles are fixedly arranged on each brush roll (20), friction wheels (21) are fixedly arranged on the rotating shafts at two ends of each brush roll (20), friction plates (22) are arranged on the friction wheels (21) in a friction mode, and the two friction plates (22) are fixedly arranged on two sides inside the filter body (11) respectively.

5. The wastewater filter with the collection structure according to claim 2, wherein the squeezing mechanism comprises a pressing plate (24), the two pressing plates (24) are respectively matched and arranged at positions corresponding to the positions above the two collection boxes (15), the upper ends of the pressing plates (24) are respectively fixedly connected with the output ends of a first spring telescopic rod (25) and two second spring telescopic rods (26), the first spring telescopic rod (25) and the two second spring telescopic rods (26) are respectively fixedly arranged at the bottom ends of mounting plates, the two mounting plates are respectively fixedly connected with the output ends of a first electric push rod (28) and a second electric push rod (29), the first electric push rod (28) and the second electric push rod (29) are respectively fixedly arranged at the upper inner end of the filter body (11), a first travel switch (30) and a second travel switch (31) are respectively fixedly arranged at positions corresponding to the two sides of the first fixing plate, the first travel switch (30) and the second travel switch (31) are respectively fixedly connected with the first electric push rod (28) and the second electric push rod (29) at positions corresponding to the first side of the filter body (11), the second travel switch (31) is fixedly arranged at a position corresponding to the position of the first electric push rod (28) on one side inside the filter body (11).

6. The wastewater filter with the collecting structure according to claim 5, wherein buttons (27) are fixedly arranged at the upper ends of the inner parts of the first spring telescopic rods (25), and the buttons (27) are electrically connected with an external control part.

7. The wastewater filter with the collecting structure according to claim 1, wherein a plurality of circular filter holes are arranged at the bottom end inside the collecting box (15) and at two sides in the length direction.

8. The wastewater filter with the collection structure according to claim 1, wherein limiting plates (32) are arranged at positions corresponding to the positions of the collecting box (15) on one side of the filter body (11), one end of each limiting plate (32) is rotatably provided with a fixed column, and the fixed column is fixedly arranged on one side of the filter body (11).