CN110815777A

CN110815777A - Novel screen changer

Info

Publication number: CN110815777A
Application number: CN201911030227.XA
Authority: CN
Inventors: 梁坤焕; 周世刚; 薛帆
Original assignee: Guangdong Yingtong New Materials Co Ltd
Current assignee: Guangdong Yingtong New Materials Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-02-21

Abstract

The invention discloses a novel screen changer, which comprises: the device comprises a main body, a first cavity and a second cavity, wherein the main body is provided with a feeding hole and a discharging hole which are coaxially arranged, and the first cavity and the second cavity are positioned on two sides of a connecting line of the feeding hole and the discharging hole; the second cavity is provided with a discharge channel communicated with the first cavity and a discharge chute communicated with the discharge hole; the first filter element is used for filtering the raw material from the feeding chute and discharging the filtered raw material to the discharging channel; the second filter element is used for filtering the raw material from the discharging channel and discharging the filtered raw material to the discharging chute; and the filter further comprises a first power member for pushing out the first filter member and a second power member for pushing out the second filter member. The novel screen changer can improve the processing capacity, reduce blockage, avoid frequent shutdown maintenance and improve the extrusion efficiency of plasticized materials.

Description

Novel screen changer

Technical Field

The invention relates to the structure of industrial extrusion equipment, in particular to a novel screen changer.

Background

The screen changer is a filtering device, is mainly used for the extrusion production of plasticized materials, and has the function of filtering particle impurities in molten plastics, thereby improving the quality of products.

However, the existing screen changer has limited processing capacity, is easy to cause blockage, needs frequent shutdown for maintenance, and reduces the extrusion efficiency of the plasticized material.

Disclosure of Invention

The invention aims to at least solve one of the technical problems in the prior art, and provides a novel screen changer which can improve the processing capacity, reduce blockage, avoid frequent shutdown maintenance and improve the extrusion efficiency of plasticized materials.

In a first aspect of the present invention, a novel screen changer is provided, which includes: the main body is provided with a feeding hole and a discharging hole which are coaxially arranged; the first cavity is arranged in the main body, is positioned on one side of a connecting line of the feed port and the discharge port, and is provided with a feed chute communicated with the feed port; the second cavity is arranged in the main body, is positioned on the other side of the connecting line of the feed inlet and the discharge outlet, and is provided with a discharge channel communicated with the first cavity and a discharge chute communicated with the discharge outlet; the first filtering piece is detachably arranged in the first cavity, is used for filtering the raw materials from the feeding chute and is used for discharging the filtered raw materials to the discharging channel; the second filter element is detachably arranged in the second cavity, is used for filtering the raw materials from the discharging channel and is used for discharging the filtered raw materials to the discharging chute; a first power member mounted to the body for pushing the first filter element out of the first cavity; and the second power piece is arranged on the main body and used for pushing the second filter piece out of the second cavity.

Has the advantages that: compared with the prior art, the novel screen changer is provided with the feeding port and the discharging port, so that the feeding port and the discharging port are coaxially arranged, the radial specification and size of the main body along the feeding port and the discharging port can be reduced, the volume of the main body is reduced, the mass of the main body is lightened, the surface area of the main body is reduced, and heat loss is reduced.

Compared with the prior art, the novel screen changer has the advantages that the first cavity and the second cavity are arranged on two sides of the connecting line of the feeding hole and the discharging hole, meanwhile, the first cavity is provided with the feeding inclined channel communicated with the feeding hole, the second cavity is provided with the discharging inclined channel communicated with the discharging hole, the distance between the feeding hole and the discharging hole can be shortened, the size of the main body is further reduced, meanwhile, the temperature difference between the feeding hole and the discharging hole is reduced, and the extrusion quality of products is prevented from being influenced.

Furthermore, the novel screen changer is provided with the first filter element and the second filter element, so that the first cavity and the second cavity are communicated through the discharge channel, and further, raw materials can be filtered in two stages, the filtering blockage is delayed, the maintenance period is prolonged, the maintenance frequency is reduced, and the production efficiency is improved.

Specially, the raw materials can be detained the large granule raw materials near feed inlet one side through the two-stage filtration, and then for the large granule raw materials is by continuous heating, and then, reduces the granule of leaving over because the heating is insufficient.

Especially, the raw materials are filtered through two stages, and filter pieces with smaller gaps can be selected, so that the raw materials of popular discharge ports are finer and smoother, and the interference of particle impurities is reduced and even avoided.

In addition, the novel net changer is provided with the first power part and the second power part, so that the first filter part and the second filter part can be respectively pushed out from the first cavity and the second cavity in a power-assisted manner, the resistance for disassembling the first filter part and the second filter part is reduced, and the disassembling difficulty is reduced.

According to the novel screen changer of the first aspect of the present invention, the first filter element is cylindrical, the first filter element has a first filter cartridge, a first filter outlet and a first L-shaped channel, the first filter cartridge is located in a radial direction of the first filter element, the first filter outlet is located at an end of the first filter cartridge and is configured to receive the raw material filtered by the first filter cartridge, and the first L-shaped channel is configured to communicate the first filter outlet with the discharge channel.

Advantageously, the novel screen changer of the present invention can increase the filtering area of the first filtering element, improve the filtering capacity, and delay the blockage of the first filtering element by providing the first filtering element with the first filtering cylinder, thereby forming an annular filtering area.

Meanwhile, the novel screen changer can change the outflow direction of the raw materials by arranging the first filtering outlet and the first L-shaped channel, so that the raw materials can flow to the discharge channel conveniently, and the disassembly and assembly of the first filtering piece are not influenced.

According to the novel screen changer of the first aspect of the present invention, the first filter element has a first inner core, and the first inner core is located inside the first filter cartridge.

Advantageously, the novel screen changer of the present invention can reduce the flow space inside the first filter cartridge by disposing the first inner core inside the first filter cartridge, so that the flow space inside and outside the first filter cartridge is consistent, thereby reducing the flow speed difference, reducing the pressure difference inside and outside the first filter cartridge, and preventing the first filter cartridge from being damaged.

According to the novel screen changer of the first aspect of the invention, the first inner core is provided with a plurality of first support ribs for supporting the first filter cartridge, and the plurality of first support ribs extend along the axial direction of the first filter cartridge.

Advantageously, according to the novel screen changer, the first inner core is provided with the plurality of first support ribs, so that the first support ribs support the first filter cartridge, the strength of the first filter cartridge is improved, the first filter cartridge is prevented from being deformed by stress, the first support ribs extend along the axial direction of the first filter member, and adjacent first support ribs can form a channel for raw material flow, so that the flow of the raw material is not influenced.

According to the novel wire changer of the first aspect of the present invention, the first L-shaped channel is located on a side of the first filter member close to the first power member, and the second filter member has a length greater than that of the first filter member.

Advantageously, the novel screen changer of the present invention can make the solid part of the first filter member having the first L-shaped channel closely contact with the first cavity without affecting the assembly and disassembly of the first filter member by locating the first L-shaped channel on the side of the first filter member close to the first power member, so as to prevent raw material from entering the discharge passage without being filtered.

According to the novel screen changer, the length of the second filter element is larger than that of the first filter element, so that the position of the discharge channel communicated with the second cavity is close to the middle part of the second filter element, the positions of the popular second filter elements with uniform raw materials are facilitated, and the local rapid blockage of the second filter element is avoided.

According to the novel screen changer of the first aspect of the present invention, the second filter element is cylindrical, the second filter element has a second filter cylinder, a second filter outlet and a second L-shaped channel, the second filter cylinder is located in a radial direction of the second filter element, the second filter outlet is located at an end of the second filter cylinder and is configured to receive the raw material filtered by the second filter cylinder, and the second L-shaped channel is configured to communicate the second filter outlet with the discharge chute.

Advantageously, the novel screen changer of the present invention increases the filtering capacity by providing the second filter element with the second filter cartridge, and also increases the filtering area, and in particular, when the length of the second filter element is greater than that of the first filter element, the filtering area of the second filter element is greater than that of the first filter element, thereby reducing the problem of the second filter element facing a larger obstruction to filter smaller impurities.

According to the novel screen changer of the first aspect of the present invention, the second filter element has a second inner core, and the second inner core is located inside the second filter cartridge.

Advantageously, the novel screen changer of the present invention can reduce the flow space inside the second filter cartridge by disposing the second inner core inside the second filter cartridge, so that the flow space inside and outside the second filter cartridge is consistent, thereby reducing the flow speed difference, reducing the pressure difference inside and outside the second filter cartridge, and preventing the second filter cartridge from being damaged.

According to the novel screen changer of the first aspect of the present invention, the second inner core has a supporting portion located inside the second filter cartridge and an installation portion located outside the second filter cartridge, all or part of the second filter outlet and the second L-shaped channel are located in the installation portion, the supporting portion is provided with a grid channel, and the grid channel is used for discharging the raw material filtered by the second filter cartridge to the second filter outlet.

Advantageously, the novel screen changer is provided with the second inner core, so that the second inner core is provided with the supporting part and the mounting part, and the mounting part is provided with the second filtering outlet and all or part of the second L-shaped channel, so that the discharging direction of the second filtering piece is opposite to the discharging direction of the first filtering piece, and the discharging port and the feeding port are arranged in a superposition manner.

In addition, the novel screen changer also arranges the grid channel on the supporting part, so that the raw material with filtered edges flows to the second filtering outlet, and the supporting part is not influenced to support the second filtering cylinder.

According to the novel screen changer of the first aspect of the present invention, the support portion further includes a plurality of support rings, the support rings are arranged along the axial direction of the second filter element, and the support rings are used for supporting the second filter cartridge.

The novel screen changer has the advantages that the support ring is arranged, so that the second filter cylinder can be supported, the strength of the second filter cylinder is improved, the strength of the support part can be enhanced, and the deformation of the second inner core is reduced.

According to the novel screen changer, the main body is provided with a first stop block, the first stop block is used for forming a wall of the first cavity or the second cavity, and the first stop block is arranged in the axial direction of the discharging channel.

The novel screen changer has the advantages that the first stop block is arranged to form the wall of the first cavity or the second cavity, and the first stop block is arranged in the axial direction of the discharge channel, so that the discharge channel can be machined from the installation position of the first stop block, machining difficulty is reduced, meanwhile, the wall of the first cavity or the second cavity is formed by the larger stop block, leakage can be prevented, and use of the screen changer is not affected.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is another schematic view of the embodiment of FIG. 1;

FIG. 3 is a schematic view of the first filter element of FIG. 1;

fig. 4 is a schematic view of the second filter element of fig. 1.

Reference numerals: 100-main body, 110-feed inlet, 120-discharge outlet, 130-first cavity, 140-second cavity, 150-feed chute, 160-discharge channel and 170-discharge chute;

200-a first filter element, 210-a first filter cartridge, 220-a first filter outlet, 230-a first L-shaped channel, 240-a first inner core, 250-a first support rib;

300-a second filter element, 310-a second filter cartridge, 320-a second filter outlet, 330-a second L-shaped channel, 340-a second inner core, 350-a support part, 360-a mounting part, 370-a grid channel, 380-a support ring;

400-first power member, 500-second power member, 600-first stop.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, a novel screen changer is provided, which comprises a main body 100, and a first power member 400 and a second power member 500 mounted on the main body 100.

The body 100 is typically intended to be mounted at the discharge end of an extruder.

The main part 100 can be provided with feed inlet 110 and discharge gate 120, can set up the material passageway between feed inlet 110 and the discharge gate 120, and the material passageway can set up and filter a piece, when the material passageway is flowed through to the material, filters the material, also is the raw materials and filters for the finished product material is excellent.

Referring to fig. 1, the direction of flow of the feedstock is shown by the arrows.

Referring to fig. 1, the inlet 110 and the outlet 120 are located on opposite sides of the body 100, and have distinct geometric axes, and specifically, in design, the axes of the inlet 110 and the outlet 120 are coincident, which may be referred to as a coaxial arrangement.

The main body 100 is further provided with a first cavity 130, the first cavity 130 is located at one side of a connecting line between the feed port 110 and the discharge port 120, and the first cavity 130 is provided with a feed chute 150 communicated with the feed port 110.

The main body 100 is further provided with a second cavity 140, the first cavity 130 is located at the other side of the connection line between the inlet 110 and the outlet 120, and the first cavity 130 is provided with an outlet channel 160 communicated with the first cavity 130 and an outlet chute 170 communicated with the outlet 120.

Within the first chamber 130, a first filter member 200 is removably disposed, the first filter member 200 being adapted to filter the material from the feed chute 150 and to discharge the filtered material to the discharge passage 160.

A second filter 300 is removably disposed in the second chamber 140, the second filter 300 being configured to filter the material from the outfeed conduit 160 and to discharge the filtered material to the outfeed chute 170.

Referring to fig. 2, it is clear that the first power member 400 and the second power member 500 are cylinders or other types of components, wherein the first power member 400 is used to push the first filter member 200 out of the first cavity 130; the first power member 400 is used to push the second filter member 300 out of the second chamber 140.

In this embodiment, since the feeding hole 110 and the discharging hole 120 are provided, and the feeding hole 110 and the discharging hole 120 are coaxially provided, the radial specification size of the main body 100 along the feeding hole 110 and the discharging hole 120 can be reduced, the volume of the main body 100 can be reduced, the mass of the main body 100 can be reduced, and meanwhile, the surface area of the main body 100 can be reduced, and the heat loss can be reduced.

In addition, in this embodiment, because the first cavity 130 and the second cavity 140 are provided, the first cavity 130 and the second cavity 140 are located at two sides of a connection line between the feed inlet 110 and the discharge outlet 120, and meanwhile, the first cavity 130 is provided with the feed chute 150 communicated with the feed inlet 110, and the second cavity 140 is provided with the discharge chute 170 communicated with the discharge outlet 120, a distance between the feed inlet 110 and the discharge outlet 120 can be shortened, the volume of the main body 100 is further reduced, and meanwhile, a temperature difference between the feed inlet 110 and the discharge outlet 120 is reduced, thereby avoiding affecting the extrusion quality of the product.

Furthermore, in this embodiment, because the first filter element 200 and the second filter element 300 are provided, the first cavity 130 and the second cavity 140 are communicated through the discharging channel 160, and further, the raw material can be filtered through two stages, so that the filtering blockage is delayed, the maintenance period is prolonged, the maintenance frequency is reduced, and the production efficiency is improved.

In particular, the raw materials can be detained near feed inlet 110 one side with the large granule raw materials through two-stage filtration, and then for the large granule raw materials is by continuous heating, and then, reduces the granule that leaves over because the heating is insufficient.

Especially, the raw material is filtered through two stages, and a filter piece with smaller gaps can be selected, so that the raw material of the popular discharge port 120 is finer and smoother, and the interference of particle impurities is reduced and even avoided.

In addition, in the embodiment, due to the arrangement of the first power member 400 and the second power member 500, the first filter member 200 and the second filter member 300 can be pushed out from the first cavity 130 and the second cavity 140 respectively with assistance, so that the resistance for detaching the first filter member 200 and the second filter member 300 is reduced, and the detaching difficulty is reduced.

As for the arrangement of the first filter member 200, there may be a plate-shaped filter portion extending along the first chamber 130, the filter portion dividing the first chamber 130 into two portions, up and down or left and right.

Of course, the filter house could also be fan-shaped or semi-annular, again dividing the first chamber 130 into two areas.

In some embodiments, referring to fig. 2 and 3, the first filter element 200 may also be cylindrical, the first filter element 200 has a first filter cartridge 210, a first filter outlet 220 and a first L-shaped channel 230, the first filter cartridge 210 is located in a radial direction of the first filter element 200, the first filter outlet 220 is located at an end of the first filter cartridge 210 and is used for receiving the raw material filtered by the first filter cartridge 210, and the first L-shaped channel 230 is used for communicating the first filter outlet 220 with the material outlet 160.

In this embodiment, since the first filter element 200 has the first filter cartridge 210, thereby forming an annular filter region, the filter area of the first filter element 200 can be increased, the filtering capacity can be improved, and the clogging of the first filter element 200 can be delayed.

Meanwhile, the first filtering outlet 220 and the first L-shaped channel 230 are disposed in the present embodiment, so that the flowing direction of the raw material can be changed, the raw material can flow to the discharging channel 160 conveniently, and the assembly and disassembly of the first filtering member 200 are not affected.

In some modified embodiments, it is possible to provide the first filter element 200 with a first inner core 240, the first inner core 240 being located inside the first filter cartridge 210.

In this embodiment, since the first inner core 240 is disposed inside the first filter cartridge 210, the flow space inside the first filter cartridge 210 can be reduced, so that the flow space inside and outside the first filter cartridge 210 is consistent, the flow rate difference is reduced, the pressure difference inside and outside the first filter cartridge 210 is reduced, and the first filter cartridge 210 is prevented from being damaged.

In some modified embodiments, the first inner core 240 may be provided with a plurality of first support ribs 250 supporting the first filter cartridge 210, and the plurality of first support ribs 250 may extend in the axial direction of the first filter element 200.

In this embodiment, because set up a plurality of first support ribs 250 at first inner core 240, make first support rib 250 support first filter cartridge 210, improve first filter cartridge 210's intensity, avoid first filter cartridge 210 atress to warp, moreover, first support rib 250 is followed the axial extension of first filter 200, adjacent first support rib 250 can form the passageway that the raw materials flows, does not influence the flow of raw materials.

In some modified embodiments, the first L-shaped channel 230 may be located on the side of the first filter element 200 adjacent to the first power element 400, and the second filter element 300 may have a greater length than the first filter element 200.

In this embodiment, since the first L-shaped channel 230 is located on the side of the first filter element 200 close to the first power element 400, the solid portion of the first filter element 200 having the first L-shaped channel 230 can be tightly contacted with the first cavity 130 without affecting the assembly and disassembly of the first filter element 200, so as to prevent the raw material from entering the discharging channel 160 without being filtered.

The present embodiment also facilitates the respective positions of the popular second filter 300 for the uniform material by making the length of the second filter 300 larger than that of the first filter 200 so that the position of the discharge passage 160 communicating with the second chamber 140 is close to the middle of the second filter 300, thereby preventing the second filter 300 from being partially and rapidly clogged.

For the arrangement of the second filter element 300, reference is made to the arrangement of the filter portion above.

In some embodiments, referring to fig. 2 and 4, the second filter element 300 may also be cylindrical, the second filter element 300 has a second filter cartridge 310, a second filter outlet 320 and a second L-shaped channel 330, the second filter cartridge 310 is located in a radial direction of the second filter element 300, the second filter outlet 320 is located at an end of the second filter cartridge 310 and is used for receiving the raw material filtered by the second filter cartridge 310, and the second L-shaped channel 330 is used for communicating the second filter outlet 320 with the discharge chute 170.

In the present embodiment, since the second filter member 300 has the second filter cartridge 310, the filtering area is increased, and the filtering capability is improved, and particularly, when the length of the second filter member 300 is greater than that of the first filter member 200, the filtering area of the second filter member 300 is greater than that of the first filter member 200, thereby reducing the problem of the second filter member 300 facing a large obstruction to filter finer impurities.

In some modified embodiments, it is possible to provide the second filter element 300 with a second inner core 340, the second inner core 340 being located inside the second filter cartridge 310.

In the present embodiment, also, since the second inner core 340 is disposed inside the second filter cartridge 310, the flow space inside the second filter cartridge 310 can be reduced, so that the flow space inside and outside the second filter cartridge 310 is uniform, the flow rate difference is reduced, the pressure difference inside and outside the second filter cartridge 310 is reduced, and the second filter cartridge 310 is prevented from being damaged.

In some modified embodiments, the second inner core 340 may have a supporting portion 350 located inside the second filter cartridge 310, a mounting portion 360 located outside the second filter cartridge 310, and all or part of the second filter outlet 320 and the second L-shaped passage 330 are located in the mounting portion 360, and the supporting portion 350 is provided with a grill passage 370 for discharging the filtered material of the second filter cartridge 310 to the second filter outlet 320.

In this embodiment, since the second inner core 340 is provided, the second inner core 340 has the supporting portion 350 and the mounting portion 360, and the second filter outlet 320 and all or a part of the second L-shaped channel 330 are provided in the mounting portion 360, the discharging direction of the second filter member 300 is opposite to the discharging direction of the first filter member 200, so that the discharging port 120 and the feeding port 110 are overlapped.

Furthermore, the present embodiment also provides the grill passage 370 to the support part 350, so that the edge-filtered material flows to the second filter outlet 320 without affecting the support of the second filter cartridge 310 by the support part 350.

In some modified embodiments, the support portion 350 may further include a plurality of support rings 380, the plurality of support rings 380 are arranged along the axial direction of the second filter element 300, and the plurality of support rings 380 are used for supporting the second filter cartridge 310.

In this embodiment, since the support ring 380 is provided, on one hand, the second filter cartridge 310 can be supported, so as to improve the strength of the second filter cartridge 310, and on the other hand, the strength of the support portion 350 itself can be enhanced, so as to reduce the deformation of the second inner core 340.

In some modified embodiments, the main body 100 may be provided with a first stopper 600, the first stopper 600 is used to form a wall of the first cavity 130 or the second cavity 140, and the first stopper 600 is disposed in an axial direction of the material outlet 160.

In this embodiment, because the first stopper 600 is provided, the first stopper 600 forms the wall of the first chamber 130 or the second chamber 140, and the first stopper 600 is provided in the axial direction of the discharging channel 160, so that the discharging channel 160 can be formed by processing from the installation position of the first stopper 600, thereby reducing the processing difficulty, and meanwhile, the leakage can be prevented by forming the wall of the first chamber 130 or the second chamber 140 by using a larger stopper, and the use of the screen changer is not affected.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A novel screen changer is characterized by comprising:

a main body (100) having a feed inlet (110) and a discharge outlet (120) arranged coaxially;

the first cavity (130) is arranged in the main body (100), is positioned on one side of a connecting line of the feed port (110) and the discharge port (120), and is provided with a feed chute (150) communicated with the feed port (110);

the second cavity (140) is arranged in the main body (100), is positioned on the other side of a connecting line of the feed inlet (110) and the discharge outlet (120), and is provided with a discharge channel (160) communicated with the first cavity (130) and a discharge chute (170) communicated with the discharge outlet (120);

a first filter element (200) removably disposed within the first chamber (130) for filtering material from the feed chute (150) for discharging filtered material to the discharge chute (160);

a second filter element (300) removably disposed within the second chamber (140) for filtering the material from the outfeed chute (160) and for discharging the filtered material to the outfeed chute (170);

a first power member (400) mounted on the main body (100) for pushing the first filter member (200) out of the first cavity (130);

a second power member (500) mounted to the main body (100) for pushing the second filter member (300) out of the second chamber (140).

2. A new type of net changer according to claim 1, characterized in that the first filter element (200) is cylindrical, the first filter element (200) has a first filter cartridge (210), a first filter outlet (220) and a first L-shaped channel (230), the first filter cartridge (210) is located in the radial direction of the first filter element (200), the first filter outlet (220) is located at the end of the first filter cartridge (210) and is used for receiving the raw material filtered by the first filter cartridge (210), and the first L-shaped channel (230) is used for communicating the first filter outlet (220) with the material outlet channel (160).

3. A new type of screen changer according to claim 2, characterized in that the first filter element (200) has a first inner core (240), the first inner core (240) being located inside the first filter cartridge (210).

4. A new type of net changer according to claim 3, characterized in that said first inner core (240) is provided with a plurality of first supporting ribs (250) for supporting said first filter cartridge (210), and a plurality of said first supporting ribs (250) extend along the axial direction of said first filter member (200).

5. A new type of net changer according to claim 2, characterized in that said first L-shaped channel (230) is located on the side of said first filter element (200) close to said first power element (400), and said second filter element (300) has a greater length than said first filter element (200).

6. A new type of net changer according to claim 1, characterized in that the second filter element (300) is cylindrical, the second filter element (300) has a second filter cartridge (310), a second filter outlet (320) and a second L-shaped channel (330), the second filter cartridge (310) is located in the radial direction of the second filter element (300), the second filter outlet (320) is located at the end of the second filter cartridge (310) and is used for receiving the raw material filtered by the second filter cartridge (310), and the second L-shaped channel (330) is used for communicating the second filter outlet (320) with the discharge chute (170).

7. A new type of wire changer according to claim 6, characterized in that the second filter element (300) has a second inner core (340), the second inner core (340) being located inside the second filter cartridge (310).

8. The net changer as claimed in claim 7, wherein the second inner core (340) has a support portion (350) inside the second filter cartridge (310), a mounting portion (360) outside the second filter cartridge (310), the second filter outlet (320) and the second L

The whole or part of the shape channel (330) is positioned in the mounting part (360), the supporting part (350) is provided with a grid channel, and the grid channel (370) is used for discharging the raw material filtered by the second filter cartridge (310) to the second filter outlet (320).

9. The new net changer as recited in claim 8, characterized in that said supporting portion (350) further comprises a plurality of supporting rings (380), a plurality of said supporting rings (380) are arranged along the axial direction of said second filter element (300), a plurality of said supporting rings (380) are used for supporting said second filter cartridge (310).

10. A new type of net changer according to claim 1, characterized in that the main body (100) is provided with a first stop (600), the first stop (600) is used to form the wall of the first chamber (130) or the second chamber (140), the first stop (600) is arranged in the axial direction of the discharging channel (160).