Self-cleaning device for filter screen

Abstract

The utility model relates to a filter screen self-cleaning device which comprises a switching box and a cleaning assembly, the switching box is provided with a feeding port, an installation cavity and a discharging port which are sequentially communicated, a filter screen is arranged in the installation cavity, the cleaning assembly comprises a backwashing box, a recycling box and a water control piece, the backwashing box is arranged on the side, close to the discharging port, of the installation cavity, and the recycling box is arranged on the side, close to the discharging port, of the installation cavity. The recycling box is arranged on the side, close to the feeding port, of the mounting cavity, through holes are formed in the opposite sides of the backwashing box and the recycling box, and the backwashing box and the recycling box are in sliding and sealing connection with the switching box; when the filter screen is cleaned, the backwashing box and the recovery box can slide to the position where a cleaning cavity is formed between the backwashing box and the transfer box, hot water is guided into the backwashing box through the water control part and is guided out from the through hole in the top of the backwashing box, so that impurities on the filter screen can be washed, and waste water and the impurities generated by washing are recovered through the recovery box, so that the cleaning process of the filter screen is completed; and the cleaning effect is good, and mechanical abrasion and other situations do not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of extruders, in particular to a filter screen self-cleaning device. Background Art

[0002] The molten plastic is introduced into the extruder, extruded into strips, and finally pelletized to obtain the required pellets. To ensure the quality of the pellets, a filter is set at the feed inlet of the extruder to intercept impurities in the molten plastic.

[0003] When the filter is used for a long time, impurities accumulate in the filter holes on it, which will affect the permeability of the filter. For this reason, the plastic pipe extrusion equipment proposed by the utility model patent with application number CN201620639945.2 can be used. The filter head without changing the filter screen can be used, wherein a filter plate scraper includes a scraper body, the middle part of the scraper body has a mounting hole for the rotation shaft to pass through, and the outer side wall of the scraper body has at least two arc-shaped scraper arms evenly distributed along the circumferential direction, and the side wall of the arc-shaped scraper arm convex outward has an arc-shaped receiving groove, and the receiving groove extends to the outer end face of the arc-shaped scraper arm. The side wall of the arc-shaped scraper arm convex outward has an arc-shaped receiving groove, and the receiving groove extends to the outer end face of the arc-shaped scraper arm. This structural form enables the filter plate scraper to limit the impurities when rotating, and can efficiently throw the impurities to the impurity discharge port.

[0004] However, if the scraper moves against the filter, there will be wear between the scraper and the filter. If there is a gap between the scraper and the filter, impurities between the scraper and the filter will affect the scraper during rotation, and some impurities embedded in the filter will be difficult to introduce into the scraper's receiving groove. Utility Model Content

[0005] In view of this, it is necessary to provide a self-cleaning device for the filter to solve the problem that if the scraper is attached to the filter and moves, there will be wear between the scraper and the filter; if there is a gap between the scraper and the filter, during the rotation of the scraper, impurities between the scraper and the filter will affect the scraper, and some impurities embedded in the filter will be difficult to introduce into the scraper's receiving groove.

[0006] The utility model provides a filter self-cleaning device, including an adapter box and a cleaning component, the adapter box has a feed port, an installation cavity and a discharge port which are connected in sequence, the filter is built in the installation cavity, the cleaning component includes a backwash box, a recovery box and a water control component, the backwash box is arranged on a side of the installation cavity close to the discharge port, the recovery box is arranged on a side of the installation cavity close to the feed port, through holes are arranged on opposite sides of the backwash box and the recovery box, the backwash box and the recovery box are both slidably and sealedly connected to the adapter box, the backwash box and the recovery box can slide to a position where a cleaning cavity wrapping the filter is formed between the adapter box, the backwash box and the recovery box can slide to a position staggered from the filter, and the water control component is connected to the backwash box and the recovery box.

[0007] Furthermore, the water control component includes a connecting frame and a centrifugal pump, a water tank, a heater and a vacuum pump installed on the connecting frame, the connecting frame is fixedly connected to the backwash box and the recovery box, the water inlet end of the centrifugal pump is connected to the water tank, the water outlet end of the centrifugal pump is connected to the backwash box via the heater, one end of the vacuum pump is connected to the recovery box, and the other end of the vacuum pump is connected to the water tank.

[0008] Furthermore, the cleaning component also includes a driving member, which is installed on the side wall of the adapter box. The output end of the driving member is connected to the connecting frame to drive the connecting frame to drive the backwash box and the recovery box to slide synchronously.

[0009] Furthermore, the driving member includes a fixed seat, a screw, a threaded sleeve and a motor, the fixed seat is fixedly connected to the side wall of the adapter box, the screw is rotatably connected to the fixed seat, the connecting frame is slidably connected to the fixed seat and fixedly connected to the threaded sleeve, the threaded sleeve is threadedly connected to the screw, the motor is installed on the fixed seat, and the output end of the motor is connected to the screw to drive the screw to rotate.

[0010] Furthermore, two slide grooves connected to the installation cavity are provided on the side wall of the adapter box, and two slots are provided on the inner wall of the adapter box away from the backwash box. The backwash box and the recovery box respectively pass through the two slide grooves to the installation cavity and can be engaged with the two slots.

[0011] Furthermore, sealing rings are provided in the two slide grooves of the adapter box, and the inner rings of the two sealing rings are respectively slidably abutted against the backwash box and the recovery box.

[0012] Furthermore, a backwash chamber connected to the water control member is formed inside the backwash box, and the plurality of through holes on the top of the backwash box are arranged in a matrix.

[0013] Furthermore, a recovery chamber connected to the water control member is formed inside the recovery box, the multiple through holes at the bottom of the backwash box are arranged in a matrix, and the aperture of the through holes on the backwash box is larger than the aperture of the filter.

[0014] Furthermore, the number of the installation cavities in the adapter box is two, the two installation cavities are arranged at intervals, the tops of the two installation cavities are connected to the feed port, the bottoms of the two installation cavities are connected to the discharge port, and a partition is also included, the partition is built into the adapter box and rotatably connected to the adapter box, the partition can be rotated to a position to block the feed port and any one of the installation cavities, the number of the cleaning components is two, and the two installation cavities correspond one to one.

[0015] Furthermore, it also includes a rotating shaft, which is connected to the partition, and one end of the rotating shaft extends outside the adapter box.

[0016] Compared with the prior art, the backwash box and the recovery box are at staggered positions with the filter screen. At this time, the molten plastic is introduced into the extruder through the feed port, the installation cavity and the discharge port of the adapter box in sequence. The filter screen located in the installation cavity filters and intercepts impurities in the molten plastic. After a period of time, the filter screen needs to be cleaned. At this time, the backwash box and the recovery box can be slid to a position where a cleaning cavity wrapping the filter screen is formed between the adapter box and the hot water is introduced into the backwash box through the water control part and discharged from the through hole on the top of the backwash box, so that the impurities on the filter screen can be flushed, and the flushing waste water and impurities can be recovered through the recovery box, thereby completing the cleaning process of the filter screen, with good cleaning effect and no mechanical wear and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of the filter self-cleaning device provided in an embodiment of the utility model;

[0018] Figure 2 The filter self-cleaning device provided by the embodiment of the utility model Figure 1 Enlarged schematic diagram of part A in the middle. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0020] like Figure 1As shown, the utility model provides a filter self-cleaning device, including an adapter box 100 and a cleaning assembly 200, the adapter box 100 has a feed inlet 110, a mounting cavity 120 and a discharge port 130 connected in sequence, the filter M is built into the mounting cavity 120, the cleaning assembly 200 includes a backwash box 210, a recovery box 220 and a water control member 230, the backwash box 210 is arranged on one side of the mounting cavity 120 close to the discharge port 130, the recovery box 220 is arranged on the side of the mounting cavity 120 close to the discharge port 130, and the recovery box 220 is arranged on the side of the mounting cavity 120 close to the discharge port 130. Through holes are provided on one side of the feed port 110 and on the side opposite to the backwash box 210 and the recovery box 220. The backwash box 210 and the recovery box 220 are both slidably and sealedly connected to the adapter box 100. The backwash box 210 and the recovery box 220 can slide to a position where a cleaning cavity that wraps the filter is formed between the adapter box 100. The backwash box 210 and the recovery box 220 can slide to a position that is staggered from the filter M. The water control part 230 is connected to the backwash box 210 and the recovery box 220.

[0021] Usually, the backwash box 210 and the recovery box 220 are at a position staggered from the filter screen M. At this time, the molten plastic is introduced into the extruder through the feed port 110, the installation cavity 120 and the discharge port 130 of the adapter box 100 in sequence, and the filter screen M located in the installation cavity 120 filters and intercepts impurities in the molten plastic. After a period of time, the filter screen M needs to be cleaned. At this time, the backwash box 210 and the recovery box 220 can be slid to a position where a cleaning cavity wrapping the filter screen M is formed between the adapter box 100, and hot water is introduced into the backwash box 210 through the water control part 230 and discharged from the through hole at the top of the backwash box 210, so that the impurities on the filter screen M can be flushed, and the flushed waste water and impurities are recovered through the recovery box 220, thereby completing the cleaning process of the filter screen M, with good cleaning effect and no mechanical wear.

[0022] The adapter box 100 in this embodiment is a structure for placing a filter screen M for filtering molten plastic, and at the same time, the molten plastic can be introduced into the extruder. The adapter box 100 has a feed inlet 110, a mounting cavity 120 and a discharge port 130 connected in sequence, and the filter screen M is built into the mounting cavity 120.

[0023] The cleaning component 200 in this embodiment is a structure for cleaning the filter screen M. The cleaning component 200 includes a backwash box 210, a recovery box 220 and a water control component 230. The backwash box 210 is arranged on a side of the installation cavity 120 close to the discharge port 130, and the recovery box 220 is arranged on a side of the installation cavity 120 close to the feed port 110. Through holes are provided on the opposite sides of the backwash box 210 and the recovery box 220. The backwash box 210 and the recovery box 220 are both slidably and sealedly connected to the adapter box 100. The backwash box 210 and the recovery box 220 can slide to a position where a cleaning cavity that wraps the filter screen is formed between the adapter box 100. The backwash box 210 and the recovery box 220 can slide to a position staggered from the filter screen M, and the water control component 230 is connected to the backwash box 210 and the recovery box 220.

[0024] It is understandable that the water used for cleaning is hot water, which can prevent the molten plastic from condensing on the filter screen M due to cooling.

[0025] In one embodiment, a backwash chamber communicating with the water control member 230 is formed inside the backwash box 210 , and a plurality of through holes on the top of the backwash box 210 are arranged in a matrix.

[0026] In one embodiment, a recovery chamber connected to the water control member 230 is formed inside the recovery box 220, and multiple through holes at the bottom of the backwash box 210 are arranged in a matrix, and the aperture of the through holes on the backwash box 210 is larger than the aperture of the filter M.

[0027] like Figure 2 As shown, in one embodiment, the water control component 230 includes a connecting frame 231 and a centrifugal pump 232, a water tank 234, a heater 233 and a vacuum pump 235 installed on the connecting frame 231. The connecting frame 231 is fixedly connected to the backwash box 210 and the recovery box 220. The water inlet end of the centrifugal pump 232 is connected to the water tank 234, and the water outlet end of the centrifugal pump 232 is connected to the backwash box 210 via the heater 233. One end of the vacuum pump 235 is connected to the recovery box 220, and the other end of the vacuum pump 235 is connected to the water tank 234.

[0028] It is understandable that in order to prevent the residual water in the cleaning chamber from affecting the molten plastic, the centrifugal pump 232 can be reversed to pump out the residual water in the cleaning chamber.

[0029] In order to facilitate driving the backwash box 210 and the recovery box 220 to slide, in one embodiment, the cleaning assembly 200 also includes a driving member 240, which is installed on the side wall of the adapter box 100. The output end of the driving member 240 is connected to the connecting frame 231 to drive the connecting frame 231 to drive the backwash box 210 and the recovery box 220 to slide synchronously.

[0030] Among them, the driving member 240 includes a fixed seat 241, a screw 242, a threaded sleeve 243 and a motor 244. The fixed seat 241 is fixedly connected to the side wall of the adapter box 100, the screw 242 is rotatably connected to the fixed seat 241, the connecting frame 231 is slidably connected to the fixed seat 241 and fixedly connected to the threaded sleeve 243, the threaded sleeve 243 is threadedly connected to the screw 242, and the motor 244 is installed on the fixed seat 241, and the output end of the motor 244 is connected to the screw 242 to drive the screw 242 to rotate.

[0031] In one embodiment, two slide grooves connected to the installation cavity 120 are opened on the side wall of the adapter box 100, and two slots are opened on the inner wall of the adapter box 100 away from the backwash box 210. The backwash box 210 and the recovery box 220 pass through the two slide grooves to the installation cavity 120 respectively, and can be snapped into the two slots.

[0032] Among them, sealing rings are arranged in the two sliding grooves of the adapter box 100, and the inner rings of the two sealing rings are respectively slidably abutted against the backwash box 210 and the recovery box 220.

[0033] In order to achieve continuous production, in one embodiment, the number of installation cavities 120 in the adapter box 100 is two, and the two installation cavities 120 are arranged at intervals. The tops of the two installation cavities 120 are connected to the feed port 110, and the bottoms of the two installation cavities 120 are connected to the discharge port 130. A partition 300 is also included. The partition 300 is built into the adapter box 100 and is rotatably connected to the adapter box 100. The partition 300 can be rotated to a position to block the feed port 110 and any installation cavity 120. The number of cleaning components 200 is two, and the two installation cavities 120 correspond one to one.

[0034] In order to facilitate driving the partition 300 to rotate, in one embodiment, a rotating shaft is further included, which is connected to the partition 300 and one end of the rotating shaft extends to the outside of the adapter box 100 .

[0035] Compared with the prior art: the backwash box 210 and the recovery box 220 are at positions staggered from the filter screen M. At this time, the molten plastic is introduced into the extruder through the feed port 110, the installation cavity 120 and the discharge port 130 of the adapter box 100 in sequence. The filter screen M located in the installation cavity 120 filters and intercepts impurities in the molten plastic. After a period of time, the filter screen M needs to be cleaned. At this time, the backwash box 210 and the recovery box 220 can be slid to a position where a cleaning cavity wrapping the filter screen M is formed between the adapter box 100. Hot water is introduced into the backwash box 210 through the water control part 230 and is led out from the through hole at the top of the backwash box 210, so that the impurities on the filter screen M can be flushed, and the flushed waste water and impurities are recovered through the recovery box 220, thereby completing the cleaning process of the filter screen M, with good cleaning effect and no mechanical wear and the like.

[0036] The above is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A filter self-cleaning device, characterized in that: Includes adapter box and cleaning kit; The adapter box has a feed port, a mounting cavity and a discharge port which are connected in sequence, and the filter screen is built into the mounting cavity; The cleaning assembly includes a backwash box, a recovery box and a water control component. The backwash box is arranged on a side of the installation cavity close to the discharge port, and the recovery box is arranged on a side of the installation cavity close to the feed port. Through holes are provided on opposite sides of the backwash box and the recovery box. The backwash box and the recovery box are both slidably and sealedly connected to the adapter box. The backwash box and the recovery box can slide to a position where a cleaning cavity that wraps a filter is formed between the adapter box and the backwash box, and the backwash box and the recovery box can slide to a position staggered from the filter, and the water control component is connected to the backwash box and the recovery box.

2. The filter self-cleaning device according to claim 1, characterized in that: The water control component includes a connecting frame and a centrifugal pump, a water tank, a heater and a vacuum pump installed on the connecting frame. The connecting frame is fixedly connected to the backwash box and the recovery box. The water inlet end of the centrifugal pump is connected to the water tank, and the water outlet end of the centrifugal pump is connected to the backwash box via the heater. One end of the vacuum pump is connected to the recovery box, and the other end of the vacuum pump is connected to the water tank.

3. The filter self-cleaning device according to claim 2, characterized in that: The cleaning assembly also includes a driving member, which is installed on the side wall of the adapter box. The output end of the driving member is connected to the connecting frame to drive the connecting frame to drive the backwash box and the recovery box to slide synchronously.

4. The filter self-cleaning device according to claim 3, characterized in that: The driving member includes a fixed seat, a screw, a threaded sleeve and a motor. The fixed seat is fixedly connected to the side wall of the adapter box, the screw is rotatably connected to the fixed seat, the connecting frame is slidably connected to the fixed seat and fixedly connected to the threaded sleeve, the threaded sleeve is threadedly connected to the screw, the motor is installed on the fixed seat, and the output end of the motor is connected to the screw to drive the screw to rotate.

5. The filter self-cleaning device according to claim 1, characterized in that: Two slide grooves connected to the installation cavity are provided on the side wall of the adapter box, and two slots are provided on the inner wall of the adapter box away from the backwash box. The backwash box and the recovery box respectively pass through the two slide grooves to the installation cavity and can be engaged with the two slots.

6. The filter self-cleaning device according to claim 5, characterized in that: Sealing rings are arranged in the two sliding grooves of the adapter box, and the inner rings of the two sealing rings are respectively in sliding contact with the backwash box and the recovery box.

7. The filter self-cleaning device according to claim 1, characterized in that: A backwash chamber connected to the water control member is formed inside the backwash box, and the plurality of through holes on the top of the backwash box are arranged in a matrix.

8. The filter self-cleaning device according to claim 1, characterized in that: A recovery chamber connected to the water control member is formed inside the recovery box, and the plurality of through holes at the bottom of the backwash box are arranged in a matrix, and the aperture of the through holes on the backwash box is larger than the aperture of the filter.

9. The filter self-cleaning device according to claim 1, characterized in that: There are two installation cavities in the adapter box, and the two installation cavities are spaced apart. The tops of the two installation cavities are connected to the feed port, and the bottoms of the two installation cavities are connected to the discharge port. The adapter box also includes a partition, which is built into the adapter box and rotatably connected to the adapter box. The partition can be rotated to a position to block the feed port and any one of the installation cavities. There are two cleaning components, and the two installation cavities correspond one to one.

10. The filter self-cleaning device according to claim 9, characterized in that: It also includes a rotating shaft, which is connected to the partition plate, and one end of the rotating shaft extends outside the adapter box.

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