CN210999893U

CN210999893U - Non-silk screen filter

Info

Publication number: CN210999893U
Application number: CN201922021553.6U
Authority: CN
Inventors: 钟承希; 张志伟
Original assignee: Zhejiang Houpu Technology Co ltd
Current assignee: Zhejiang Houpu Technology Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-07-14
Anticipated expiration: 2029-11-20

Abstract

The utility model provides a no silk screen filter belongs to no silk screen filter technical field. The filter solves the problem that the existing non-wire mesh filter has low recovery rate of molten plastic fluid. This no silk screen filter includes the box, the box is equipped with the installation cavity, first feed inlet, discharge gate and bin outlet, be equipped with first filter and second filter in the installation cavity, first filter and second filter separate into mutually independent spaced discharge chamber with the installation cavity and are located the first feeding chamber of discharge chamber both sides respectively, second feeding chamber, still include first actuating mechanism, second actuating mechanism and the first scraper blade and the second scraper blade that are located first feeding chamber and second feeding chamber respectively, first row's silo and second row's silo have been seted up to the bottom half, install first screw rod and the second screw rod of being connected with second actuating mechanism on first row's silo and the second row's silo respectively. The non-wire mesh filter has the advantages of high recovery efficiency of molten plastic fluid and high impurity discharge efficiency.

Description

Non-silk screen filter

Technical Field

The utility model belongs to the technical field of no silk screen filter, a no silk screen filter is related to.

Background

In the plastic granulation industry, in order to solve the problem that the traditional filter needs to frequently replace a filter screen, a non-screen filter appears on the market, and the non-screen filter can filter a molten plastic mixture without arranging a filter screen, so that the non-screen filter is widely adopted in the market. The existing filter adopts a filter plate structure to replace an original filter screen structure, filter through holes are densely formed in the filter plate, when a non-silk-screen filter is adopted to filter the molten plastic mixture of the granulation, the filter through holes filter and intercept impurities with the caliber larger than that of the filter through holes in the molten plastic, and the molten plastic fluid passing through the filter through holes enters a discharge cavity and is output from a discharge hole. In practice, the impurities trapped by the filtration need to be discharged, or else can stay in the filter plate, or even in the through-hole of the filtration, thereby affecting the normal filtration function of the filter plate.

At present, impurity treatment is generally to discharge impurities directly at any time through a discharge pipe, for example, as the published Chinese patent with the publication number of CN206926232U and the name of a filter, the technical scheme comprises a box body, wherein the box body is provided with a mounting cavity, a feeding hole, a discharging hole and a slag discharging hole; the support assembly is fixedly installed in the installation cavity, a material containing cavity is formed in the support assembly, the discharge port is communicated with the material containing cavity, a flow passage is arranged on the support assembly, and the flow passage is communicated with the material containing cavity; the filter plate comprises a first filter plate and a second filter plate, wherein filter through holes are formed in the two filter plates, the first filter plate is fixedly arranged on the first side of the supporting component, and the second filter plate is fixedly arranged on the second side of the supporting component; the scraper assembly comprises a first scraper and a second scraper, wherein a blade of the first scraper is attached to the surface of the first filter plate, a blade of the second scraper is attached to the surface of the second filter plate, a feeding containing cavity is formed among the first filter plate, the second filter plate and the wall of the mounting cavity, the feeding inlet is communicated with the feeding containing cavity, and the slag discharging port is communicated with the feeding containing cavity; the driving mechanism is connected to the box body, and the first scraper and the second scraper are connected to a driving shaft of the driving mechanism and rotate synchronously with the driving shaft. It has the problems that: the impurities are solid impurities such as metal and the like, but still contain a certain proportion of molten plastic fluid, so that the molten plastic fluid mixed in the impurities cannot be filtered and recovered due to direct discharge, and the recovery rate of the molten plastic fluid is reduced.

Disclosure of Invention

The utility model aims at solving the technical problem and providing a non-wire mesh filter.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a no silk screen filter, includes the box, the box is equipped with installation cavity, first feed inlet, discharge gate and bin outlet, be equipped with first filter and second filter in the installation cavity, be equipped with on first filter and the second filter and filter the through-hole, first filter and second filter separate into mutually independent spaced discharge chamber with above-mentioned installation cavity and first feeding chamber, the second feeding chamber that is located discharge chamber both sides respectively, the discharge chamber is located between first filter and the second filter and communicates with above-mentioned discharge gate, and first feeding chamber and second feeding chamber all communicate its characterized in that with above-mentioned second feed inlet: still include first actuating mechanism, second actuating mechanism and be located the first scraper blade and the second scraper blade in above-mentioned first feeding chamber and second feeding chamber respectively, first actuating mechanism installs and is used for driving first scraper blade and second scraper blade and pastes above-mentioned first filter and second filter plate surface back and forth movement from top to bottom respectively on the box, first row's silo and second row's silo have been seted up to the bottom half, first row's silo and second row's silo are located the bottom in above-mentioned first feeding chamber and second feeding chamber respectively and communicate with first feeding chamber and second feeding chamber respectively, install the first screw rod and the second screw rod of being connected with above-mentioned second actuating mechanism on first row's silo and the second row's silo respectively, first row's silo and second row's silo and above-mentioned bin outlet intercommunication.

In foretell no silk screen filter, the box including be located the middle base and be located above-mentioned base both sides respectively and with articulated first curb plate and the second curb plate of being connected of base, above-mentioned first feed inlet and discharge gate are seted up on the base, above-mentioned first filter and second filter are installed on the base, first filter, base and first curb plate have formed foretell first feeding chamber, second filter, base and second curb plate have formed foretell second feeding chamber, first filter, second filter and base have formed foretell material outlet chamber.

In the above silk screen-free filter, the base on still install the feeding seat, it has a recess and is formed with a feedstock channel between this recess and the above-mentioned feeding seat to open on the base, and above-mentioned first feed inlet is seted up on the feeding seat just first feed inlet and feedstock channel intercommunication, first feed chamber and second feed chamber are equipped with first baffle box and second baffle box respectively in the upper end separately, first baffle box and second baffle box all communicate with above-mentioned feedstock channel, the notch axial length separately of first baffle box and second baffle box respectively with the width phase-match of above-mentioned first filter and second filter.

In the above silk screen-free filter, the base on still install the ejection of compact seat, open flutedly and be formed with a discharging channel between this recess and the above-mentioned ejection of compact seat on the base, above-mentioned discharge gate is seted up on the ejection of compact seat just discharge gate and discharge chamber all communicate with discharging channel.

In the above screen-free filter, the base is further provided with a support plate, the support plate divides the discharge chamber into a first inner chamber and a second inner chamber, the support plate is provided with three first discharge through holes, the discharge passage is provided with three second discharge through holes respectively communicated with the three first discharge through holes, and the first inner chamber and the second inner chamber are communicated with the discharge passage through the three first discharge through holes and the second discharge through holes.

In foretell no silk screen filter, first actuating mechanism include drive plate, first cylinder base and the first hydraulic cylinder of fixed mounting on first cylinder base, first cylinder base passes through two first guide arms fixed mounting on above-mentioned box, the drive plate cover is established and can be followed two first guide arms and slided from top to bottom on two above-mentioned first guide arms, link firmly four second guide arms on the drive plate, above-mentioned first scraper blade and second scraper blade link firmly respectively on two of them of above-mentioned four second guide arms.

In the above screen-less filter, the second driving mechanism includes a first driving motor and a second driving motor respectively connected to the first screw rod and the second screw rod, and the first driving motor and the second driving motor respectively drive the first screw rod and the second screw rod to rotate in opposite directions; or, the driving gear shaft and the driven gear shaft are fixedly connected with the first screw and the second screw respectively, the driving gear shaft and the driven gear shaft are connected through gear meshing, and the driving gear shaft is connected with an output shaft of the driving motor through a chain.

In foretell no silk screen filter, box discharge opening department still be provided with the valve structure of wasting discharge, the valve structure of wasting discharge includes disk seat, baffle and installs the second hydraulic cylinder on the disk seat, open on the disk seat have two first through-holes and with the axial lead mutually perpendicular's of above-mentioned two first through-holes separation passageway, open on the above-mentioned baffle have two respectively with above-mentioned two first through-hole assorted second through-holes, the baffle is connected with second hydraulic cylinder and under the drive of second hydraulic cylinder the baffle can round trip movement on above-mentioned separation passageway so that two second through-holes just to setting up makes first through-hole and bin outlet switch on with above-mentioned two first through-holes, or stagger completely and make first through-hole and bin outlet cut off completely.

In foretell no silk screen filter, first through-hole that keeps away from the bin outlet serve interference fit and install the connector, it has the through-hole that is linked together with first through-hole to open on the connector, the end that first through-hole was kept away from to the connector is radial to protruding being formed with protruding edge all around in the outside, protruding edge and the disk seat between have the clearance.

In the above screen-free filter, the convex edge is provided with four square grooves on the peripheral outer side wall.

Compared with the prior art, the wire-mesh-free filter has the following advantages:

1. the waste residues such as impurities left after filtration are not directly discharged, but the impurities are pushed out and then discharged in a screw rod rotating mode, because the temperature of a molten plastic mixture is generally higher and can reach about 200 ℃, the molten plastic which really needs to be recycled is in a liquid fluid state, the impurities such as sand, iron, copper, aluminum and the like are in a solid state, in the rotating process of the screw rod, because the molten plastic is in the liquid fluid state, the molten plastic can flow back under the rotating pushing of the screw rod, the solid impurities such as sand, iron, copper, aluminum and the like can be pushed forward, the impurities containing the molten plastic fluid are further separated, the solid impurities such as sand, iron, copper, aluminum and the like are pushed forward to be accumulated at the front end of the screw rod, the molten plastic fluid in the screw rod can flow back to be concentrated at the rear end of the screw rod, and then the molten plastic fluid accumulated at the rear end of the screw rod can be carried to a filter plate for secondary filtration to a certain degree under the back-and forth movement of the scraper plate, meanwhile, the molten plastic fluid accumulated at the rear end of the screw partially overflows to the filter plate for secondary filtration after being accumulated to a certain degree, so that the molten plastic fluid is further filtered into the discharge cavity, and the recovery rate of the plastic is improved;

2. the waste discharge valve structure is arranged, so that waste materials such as impurities are discharged periodically instead of at any time, firstly, the waste materials such as the impurities are discharged uniformly after waiting for a certain time at the discharge port, a cooling device is not required to be arranged at the discharge port, and the impurities are naturally cooled within a certain waiting time, so that the structure is simplified, and the cost is reduced; secondly, when the screw pushes impurities to move towards the discharge port, the impurities in front are blocked by the partition plate of the waste discharge valve structure, the molten plastic fluid mixed in the impurities in front is pushed by the screw, the solid impurities such as sand, iron, copper and aluminum and the like pushed by the screw in front are pushed, the molten plastic fluid mixed in the impurities in front is pushed by the partition plate in front and the solid impurities such as sand, iron, copper and aluminum and the like in front are separated, the molten plastic fluid mixed in the impurities in front is pushed by the solid impurities such as sand, iron, copper and aluminum and the like pushed by the screw in front and is pushed to the back of the pushed solid impurities such as sand, iron, copper and aluminum and the like towards the two sides of the solid impurities, and the solid impurities such as sand, iron, copper and aluminum and the like pushed by the screw in back are pushed to the partition plate until the solid impurities are blocked by the partition plate; therefore, the arrangement of the waste discharge valve structure enables the solid impurities to be continuously extruded to the partition plate, the molten plastic fluid is continuously extruded to the rear part and is continuously close to the screw, and the extruded molten plastic fluid continuously moves to the rear end of the screw by combining the screw structure, so that the recovery rate of the plastic is further improved;

3. this filter has adopted bilateral symmetry's two sets of filtration, the structure of wasting discharge, has improved and has filtered the efficiency of wasting discharge, and simultaneously, the rotation direction of its first screw rod and second screw rod is opposite, is equivalent to that first screw rod and second screw rod are offset each other to the effort of box to the unstable vibrational force of rotation to the box production of first screw rod and second screw rod has been avoided, makes box work more stable.

Drawings

Fig. 1 is a schematic view of the filter.

Fig. 2 is a partial exploded view of the present filter.

Fig. 3 is another schematic construction of the filter.

Fig. 4 is a cross-sectional view at a-a in fig. 3.

Figure 5 is another side partial exploded view of the present filter.

Fig. 6 is a schematic structural view of the case.

Fig. 7 is a partial exploded view of the case.

Fig. 8 is a schematic structural view of the base.

Fig. 9 is a structural schematic view of a waste valve structure.

In the figure, 1, a box body; 1a, a first feed inlet; 1b, a discharge hole; 1c, a discharge opening; 1d, a base; 1e, a first side plate; 1f, a second side plate; 2. a first feed chamber; 3. a second feed cavity; 4. a discharge cavity; 41. a first lumen; 42. a second lumen; 5. a first filter plate; 6. a second filter plate; 7. a feeding seat; 8. a feed channel; 9. a first material guide chute; 10. a second material guide chute; 11. a discharging seat; 12. a discharge channel; 12a and a second discharge through hole; 13. a support plate; 13a, a first discharging through hole; 14. a first hydraulic cylinder; 15. a first cylinder base; 16. a first guide bar; 17. a drive plate; 18. a second guide bar; 19. a first drive motor; 20. a second drive motor; 21. a valve seat; 21a, a first through hole; 22. a partition plate; 22a, a second through hole; 23. a second hydraulic cylinder; 24. a connector; 25. a convex edge; 26. a square groove; 27. a first squeegee; 28. a second squeegee; 29. a first discharging groove; 30. a second discharge chute; 31. a first screw; 32. a second screw.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, 3 and 4, the non-silk screen filter comprises a box body 1, wherein the box body 1 is provided with a mounting cavity, a first feeding hole 1a, a discharging hole 1b and a discharging hole 1c, a first filter plate 5 and a second filter plate 6 are arranged in the mounting cavity, filter through holes are formed in the first filter plate 5 and the second filter plate 6 and are micropores, and the diameter of the filter through holes is 0.2mm and is uniformly distributed on the whole first filter plate 5 and the whole second filter plate 6. Wherein, box 1 is including being located middle base 1d and being located base 1d both sides respectively and with base 1d articulated first curb plate 1e and the second curb plate 1f of being connected, first feed inlet 1a and discharge gate 1b are seted up on base 1 d's both sides, first filter 5 and second filter 6 are installed on base 1d, first filter 5, base 1d and first curb plate 1e have formed first feeding chamber 2, second filter 6, base 1d and second curb plate 1f have formed second feeding chamber 3, first filter 5, second filter 6 and base 1d have formed ejection of compact chamber 4. First curb plate 1e and second curb plate 1f are connected with base 1d is articulated to make the maintenance comparatively convenient, when needing to maintain inner structure, for example if overhaul first filter 5 or second filter 6, only need open first curb plate 1e or second curb plate 1f can.

Further, as shown in fig. 2, 4, 6 and 8, a feeding seat 7 is further installed on the base 1d, a groove is formed on the base 1d, a feeding channel 8 is formed between the groove and the feeding seat 7, the first feeding port 1a is formed on the feeding seat 7, the first feeding port 1a is communicated with the feeding channel 8, the upper ends of the first feeding cavity 2 and the second feeding cavity 3 are respectively provided with a first material guide chute 9 and a second material guide chute 10, the first material guide chute 9 and the second material guide chute 10 are both communicated with the feeding channel 8, and the axial lengths of the respective notches of the first material guide chute 9 and the second material guide chute 10 are respectively matched with the widths of the first filter plate 5 and the second filter plate 6.

Further, as shown in fig. 2, 4, 5 and 7, a discharging seat 11 is further installed on the base 1d, a groove is formed on the base 1d, a discharging channel 12 is formed between the groove and the discharging seat 11, the discharging port 1b is formed on the discharging seat 11, and the discharging port 1b and the discharging cavity 4 are both communicated with the discharging channel 12. The base 1d is further provided with a supporting plate 13, the supporting plate 13 divides the discharging cavity 4 into a first inner cavity 41 and a second inner cavity 42, the supporting plate 13 is provided with three first discharging through holes 13a, the discharging channel 12 is provided with three second discharging through holes 12a respectively communicated with the three first discharging through holes 13a, and the first inner cavity 41 and the second inner cavity 42 are communicated with the discharging channel 12 through the three first discharging through holes 13a and the second discharging through holes 12 a. Install heating device above base 1d, continue to heat the melting plastic mixture body that enters into first baffle box 9 and second baffle box 10, in order to avoid the plastics fluid in the melting plastic mixture body to become solid-state because the temperature drops, and backup pad 13 is with base 1d upper end body structure, backup pad 13 can be fine with base 1d upper end heating device produce heat transfer to whole ejection of compact chamber 4 in, heat the plastics fluid after filtering, in order to avoid the temperature to reduce the plastics fluid after making filtering to become solid-state and stop up and can't the ejection of compact.

As shown in fig. 1, 2, 3 and 4, the present filter further includes a first drive mechanism, a second drive mechanism, a waste valve structure, and first and

second flights

27 and 28 located in the first and

second feed chambers

2 and 3, respectively.

The first driving mechanism comprises a driving plate 17, a first cylinder base 15 and a first hydraulic cylinder 14 fixedly mounted on the first cylinder base 15, the first cylinder base 15 is fixedly mounted on the box body 1 through two first guide rods 16, the driving plate 17 is sleeved on the two first guide rods 16 and can slide up and down along the two first guide rods 16, the driving plate 17 is fixedly connected with four second guide rods 18, a first scraper 27 and a second scraper 28 are fixedly connected to two of the four second guide rods 18 respectively, and the first hydraulic cylinder 14 works to drive the two scrapers to respectively attach to the surfaces of the first filter plate 5 and the second filter plate 6 to move up and down.

Further, as shown in fig. 2, 4 and 7, a first discharging groove 29 and a second discharging groove 30 are formed in the bottom of the box body 1, the first discharging groove 29 and the second discharging groove 30 are respectively located at the bottom of the first feeding cavity 2 and the bottom of the second feeding cavity 3 and are respectively communicated with the first feeding cavity 2 and the second feeding cavity 3, the axial length of the notch of the first discharging groove 29 and the notch of the second discharging groove 30 are respectively matched with the first filter plate 5 and the second filter plate 6, a first screw rod 31 and a second screw rod 32 are respectively installed on the first discharging groove 29 and the second discharging groove 30, and the first discharging groove 29 and the second discharging groove 30 are communicated with the discharging opening 1 c. The second driving mechanism comprises a first driving motor 19 and a second driving motor 20 which are respectively connected with the first screw 31 and the second screw 32, and the first driving motor 19 and the second driving motor 20 respectively drive the first screw 31 and the second screw 32 to rotate in opposite directions. Besides the structure, the second driving mechanism can also comprise a driving motor, a driving gear shaft and a driven gear shaft which are fixedly connected with the first screw 31 and the second screw 32 respectively, the driving gear shaft and the driven gear shaft are connected through gear meshing, and the driving gear shaft is connected with an output shaft of the driving motor through a chain. The rotating directions of the first screw 31 and the second screw 32 are opposite, which is equivalent to that the acting forces of the first screw 31 and the second screw 32 to the box body 1 are mutually offset, so that unstable vibration force generated to the box body 1 by the rotation of the first screw 31 and the second screw 32 is avoided, and the box body 1 works more stably.

As shown in fig. 1, 2 and 9, the waste discharge valve structure is disposed at the discharge port 1c, and includes a valve seat 21, a partition plate 22 and a second hydraulic cylinder 23 mounted on the valve seat 21, the valve seat 21 is provided with two first through holes 21a and a blocking passage perpendicular to the axial lines of the two first through holes 21a, the partition plate 22 is provided with two second through holes 22a respectively matching with the two first through holes 21a, the partition plate 22 is connected with the second hydraulic cylinder 23, and the partition plate 22 can move back and forth on the blocking passage under the driving of the second hydraulic cylinder 23 so that the two second through holes 22a and the two first through holes 21a are disposed opposite to each other to conduct the first through holes 21a and the discharge port 1c, or completely staggered to completely block the first through holes 21a and the discharge port 1 c.

Furthermore, the end of the first through hole 21a far away from the discharge opening 1c is provided with a connector 24 in an interference fit manner, the connector 24 is provided with a through hole communicated with the first through hole 21a, the end of the connector 24 far away from the first through hole 21a is protruded towards the outer side of the periphery in the radial direction to form a convex edge 25, and a gap is formed between the convex edge 25 and the valve seat 21. Protruding edge 25 and the setting in clearance are convenient for first through-hole 21a and external collection device to be connected, and the processing is collected in unison with waste residue discharge such as impurity on the collection device, avoids the polluted environment. For example, the bag opening of the garbage sack is directly sleeved on the convex edge 25, and the bag opening is tied in the gap to prevent slipping. Protruding edge 25 is opened on the lateral wall all around and is had four square groove 26, and square groove 26's setting is also for the convenience of being connected with external collection device, for example collect device is last to be furnished with protruding edge 25 and square groove 26 assorted connector 24, the lug connection can, very convenient.

During operation, the melting plastic mixture body gets into from first feed inlet 1a, loops through feedstock channel 8 and is divided into two again and enters into first feed chute and second feed chute respectively to flow in first filter 5 and second filter 6 respectively on the surface along the notch of first feed chute and the notch of second feed chute respectively, because the air in first feed chamber 2 and the second feed chamber 3 is heated by the melting plastic mixture body of high temperature and forms the high pressure, and ejection of compact chamber 4 is less than first feed chamber 2 and second feed chamber 3 with external intercommunication atmospheric pressure. Under the action of air pressure difference, most of molten plastic fluid with the caliber smaller than the calibers of the filtering through holes on the first filter plate 5 and the second filter plate 6 enters the discharging cavity 4 through the filtering through holes, and then enters the discharging hole 1b through the first discharging through hole 13a on the supporting plate 13, the second discharging through hole 12a on the discharging channel 12 and the discharging channel 12 to be output and recycled. And sand, iron, copper, aluminum and other solid impurities with the caliber larger than the filtering through hole and a small part of molten plastic fluid are blocked and stayed on the surfaces of the first filter plate 5 and the second filter plate 6, when waste is required to be discharged, the first hydraulic cylinder 14 drives the first scraper 27 and the second scraper 28 to move downwards to respectively scrape the impurities on the first filter plate 5 and the second filter plate 6 and the small part of molten plastic fluid mixture into the first discharging groove 29 and the second discharging groove 30, then the first driving motor 19 and the second driving motor 20 work to respectively drive the first screw 31 and the second screw 32 to rotate and work to push the impurities and the small part of molten plastic fluid mixture forwards, and during the rotation of the screw, because the molten plastic is in a liquid fluid state, the molten plastic can flow backwards under the rotation of the screw, and the solid impurities such as sand, iron, copper, aluminum and the like can be pushed forwards, thereby further separate the impurity that contains the molten plastic fluid, thereby pile up the screw rod front end with solid impurity such as sand, iron, copper, aluminium forward, and the molten plastic fluid wherein can backward flow and concentrate on the rear end of screw rod, then can certain degree carry the molten plastic fluid of piling up at the screw rod rear end again to carry on the secondary filter under the round trip movement drive of scraper blade, pile up the molten plastic fluid of screw rod rear end simultaneously and also can partly directly spill over to carry on the secondary filter on the filter after piling up to certain degree, thereby further filter this part molten plastic fluid and retrieve in play material chamber 4, with the rate of recovery that improves plastics.

During the filtering process, the partition plate 22 on the waste discharge valve is normally closed, i.e. the second through hole 22a on the partition plate 22 and the first through hole 21a on the valve seat 21 of the waste discharge valve structure are normally completely staggered, i.e. the first through hole 21a is completely closed, so that impurities pushed forward by the screw and a small part of the molten plastic fluid mixture are blocked by the partition plate 22. The normally closed discharge device has the advantages that firstly, waste materials such as impurities and the like are uniformly and periodically discharged after waiting for a certain time at the discharge opening 1c, so that a cooling device is not required to be arranged at the discharge opening 1c, and the impurities are naturally cooled within a certain waiting time, so that the structure is simplified, and the cost is reduced; secondly, when the screw pushes the impurities to move towards the discharge opening 1c, the impurities in front are blocked by the partition plate 22 of the waste discharge valve structure, under the pushing of the screw, the molten plastic fluid mixed in the impurities in front is pushed by the solid impurities such as sand, iron, copper, aluminum and the like pushed from the rear, and the molten plastic fluid mixed in the impurities in front is pushed by the partition plate 22 and the solid impurities in front are blocked by the partition plate 22, so that the molten plastic fluid mixed in the impurities in front is pushed by the solid impurities such as sand, iron, copper, aluminum and the like pushed from the rear to the rear of the solid impurities such as sand, iron, copper, aluminum and the like pushed from the rear to the two sides of the solid impurities, and the solid impurities such as sand, iron, copper, aluminum and the like pushed from the rear are pushed to the partition plate 22 until the solid impurities are blocked by the partition plate 22 or other solid impurities; therefore, the solid impurities are continuously extruded to the partition plate 22 by the arrangement of the waste discharge valve structure, the solid impurities are collected and accumulated to lean against the partition plate 22, the molten plastic fluid is continuously extruded to the rear part to be close to the screw rod, the extruded molten plastic fluid is continuously moved to the rear end of the screw rod by combining the screw rod structure to be subjected to secondary filtration and recovery, and the recovery rate of the plastic is further improved. After a period of filtration, the partition 22 is opened to remove the impurities near the front end of the partition 22, and the removed impurities are substantially all solid impurities.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the drawings largely use the case 1, the first inlet port 1a, the outlet port 1b, the outlet port 1c, the base 1d, the first side plate 1e, the second side plate 1f, the first inlet chamber 2, the second inlet chamber 3, the outlet chamber 4, the first inner chamber 41, the second inner chamber 42, the first filter plate 5, the second filter plate 6, the inlet base 7, the inlet passage 8, the first guide chute 9, the second guide chute 10, the outlet base 11, the outlet passage 12, the second outlet through hole 12a, the support plate 13, the first outlet through hole 13a, the first hydraulic cylinder 14, the first cylinder base 15, the first guide rod 16, 17, the second guide rod 18, the first driving motor 19, the second driving motor 20, the valve base 21, the first through hole 21a, the partition plate 22, the second through hole 22a, the second hydraulic cylinder 23, the connector 24, the ledge 25, the square groove 26, the first scraper 27, the second scraper 24, and the like, The terms second scraper 28, first discharge chute 29, second discharge chute 30, first screw 31, second screw 32, etc., do not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims

1. A screen-free filter comprises a box body (1), wherein the box body (1) is provided with a mounting cavity, a first feed inlet (1a), a discharge outlet (1b) and a discharge outlet (1c), a first filter plate (5) and a second filter plate (6) are arranged in the mounting cavity, filter through holes are formed in the first filter plate (5) and the second filter plate (6), the mounting cavity is divided into a discharge cavity (4) which is mutually independent and separated and a first feed cavity (2) and a second feed cavity (3) which are respectively positioned at two sides of the discharge cavity (4) by the first filter plate (5) and the second filter plate (6), the discharge cavity (4) is positioned between the first filter plate (5) and the second filter plate (6) and is communicated with the discharge outlet (1b), and the first feed cavity (2) and the second feed cavity (3) are both communicated with the second feed inlet, the method is characterized in that: the device is characterized by further comprising a first driving mechanism, a second driving mechanism, and a first scraper (27) and a second scraper (28) which are respectively positioned in the first feeding cavity (2) and the second feeding cavity (3), wherein the first driving mechanism is arranged on the box body (1) and is used for driving the first scraper (27) and the second scraper (28) to respectively adhere to the surfaces of the first filter plate (5) and the second filter plate (6) to move back and forth, the bottom of the box body (1) is provided with a first discharging groove (29) and a second discharging groove (30), the first discharging groove (29) and the second discharging groove (30) are respectively positioned at the bottoms of the first feeding cavity (2) and the second feeding cavity (3) and are respectively communicated with the first feeding cavity (2) and the second feeding cavity (3), and a first screw (31) and a second screw (32) which are connected with the second driving mechanism are respectively arranged on the first discharging groove (29) and the second discharging groove (30), the first discharge groove (29) and the second discharge groove (30) are communicated with the discharge opening (1 c).

2. The screen-less filter according to claim 1, wherein the housing (1) comprises a base (1d) in the middle and a first side plate (1e) and a second side plate (1f) respectively located on both sides of the base (1d) and hingedly connected to the base (1d), the first feed inlet (1a) and the discharge outlet (1b) are arranged on the base (1d), the first filter plate (5) and the second filter plate (6) are mounted on a base (1d), the first filter plate (5), the base (1d) and the first side plate (1e) form the first feed chamber (2), the second filter plate (6), the base (1d) and the second side plate (1f) form the second feeding cavity (3), the first filter plate (5), the second filter plate (6) and the base (1d) form the discharging cavity (4).

3. A wire-less mesh filter according to claim 2, wherein said base (1d) is further provided with a feed block (7), a groove is arranged on the base (1d) and a feeding channel (8) is formed between the groove and the feeding seat (7), the first feed inlet (1a) is arranged on the feed seat (7) and the first feed inlet (1a) is communicated with the feed channel (8), the upper ends of the first feeding cavity (2) and the second feeding cavity (3) are respectively provided with a first guide chute (9) and a second guide chute (10), the first material guide groove (9) and the second material guide groove (10) are both communicated with the feeding channel (8), the axial lengths of the respective notches of the first guide chute (9) and the second guide chute (10) are respectively matched with the widths of the first filter plate (5) and the second filter plate (6).

4. The screen-free filter according to claim 2 or 3, wherein the base (1d) is further provided with a discharging seat (11), the base (1d) is provided with a groove, a discharging channel (12) is formed between the groove and the discharging seat (11), the discharging port (1b) is provided on the discharging seat (11), and the discharging port (1b) and the discharging cavity (4) are both communicated with the discharging channel (12).

5. The filter without screen mesh according to claim 4, wherein the base (1d) is further provided with a support plate (13), the support plate (13) divides the discharge chamber (4) into a first inner chamber (41) and a second inner chamber (42), the support plate (13) is provided with three first discharge holes (13a), the discharge channel (12) is provided with three second discharge holes (12a) respectively communicated with the three first discharge holes (13a), and the first inner chamber (41) and the second inner chamber (42) are communicated with the discharge channel (12) through the three first discharge holes (13a) and the three second discharge holes (12 a).

6. The screen-less filter of claim 4, wherein the first driving mechanism comprises a driving plate (17), a first cylinder base (15) and a first hydraulic cylinder (14) fixedly mounted on the first cylinder base (15), the first cylinder base (15) is fixedly mounted on the housing (1) through two first guide rods (16), the driving plate (17) is sleeved on the two first guide rods (16) and can slide up and down along the two first guide rods (16), the driving plate (17) is fixedly connected with four second guide rods (18), and the first scraper (27) and the second scraper (28) are respectively fixedly connected to two of the four second guide rods (18).

7. The screen-less filter of claim 4, wherein the second driving mechanism comprises a first driving motor (19) and a second driving motor (20) connected to the first screw (31) and the second screw (32), respectively, the first driving motor (19) and the second driving motor (20) driving the first screw (31) and the second screw (32) to rotate in opposite directions, respectively; or, the driving gear shaft and the driven gear shaft are fixedly connected with the first screw (31) and the second screw (32) respectively, the driving gear shaft and the driven gear shaft are connected through gear meshing, and the driving gear shaft is connected with an output shaft of the driving motor through a chain.

8. The screen-free filter according to claim 4, wherein the discharge port (1c) of the box body (1) is further provided with a waste valve structure, the waste valve structure comprises a valve seat (21), a partition plate (22) and a second hydraulic cylinder (23) arranged on the valve seat (21), the valve seat (21) is provided with two first through holes (21a) and a blocking passage perpendicular to the axial lines of the two first through holes (21a), the partition plate (22) is provided with two second through holes (22a) respectively matched with the two first through holes (21a), the partition plate (22) is connected with the second hydraulic cylinder (23) and driven by the second hydraulic cylinder (23), the partition plate (22) can move back and forth on the blocking passage to enable the two second through holes (22a) and the two first through holes (21a) to be oppositely arranged to enable the first through holes (21a) to be communicated with the discharge port (1c), or completely staggered so that the first through hole (21a) is completely blocked from the discharge opening (1 c).

9. The screen-free filter according to claim 8, wherein the end of the first through hole (21a) far away from the discharge opening (1c) is provided with a connector (24) in an interference fit manner, the connector (24) is provided with a through hole communicated with the first through hole (21a), the end of the connector (24) far away from the first through hole (21a) is radially protruded outwards to form a convex edge (25), and a gap is formed between the convex edge (25) and the valve seat (21).

10. The screen-less filter of claim 9, wherein the rim (25) has four square grooves (26) formed on the peripheral outer side wall thereof.