Netless filter die head with backflushing cleaning structure

Abstract

The utility model relates to the technical field of plastic processing equipment, and disclose a netless filter die head with backflushing cleaning structure, including filter assembly and switching mechanism, be equipped with the feed assembly, discharge assembly and deslagging mechanism of filter assembly can communicate with it, the utility model discloses a netless filter plate replaces traditional filter screen, need not to replace filter screen, reduce consumable cost, and through the backflushing medium reverse impact, can clean up small impurity in filter hole thoroughly, and the cleaning effect is superior to scraper scraping, and two groups of filter module can be alternately filtered and backflushing, avoid the need manual dismounting, scraper cleaning etc., can effectively improve equipment operation efficiency, and its filter plate has no scraper scratch risk, and the aperture is stable, can long -term maintain accurate filtration, avoid melt secondary pollution, adapt to the batch production demand of plastic extruder, and solve the problem that the existing filter screen type filter die head frequently replaces screen, and the time is longer, and the consumable cost is high.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing equipment technology, and in particular to a meshless filter head with a backflushing cleaning structure. Background Technology

[0002] In the field of plastics processing, plastic extruders are core molding equipment, and the filtration process of the melt directly affects the quality of the final product. Among them, the filter die head is a key component for intercepting impurities in the melt, such as metal scraps, coke particles, and unmelted resin particles. It is necessary to continuously ensure the cleanliness of the melt to avoid impurities causing problems such as surface defects, internal stress concentration, or blockage of the die flow channel in the product. Currently, most plastic extruders on the market use filter dies that rely on screen-type filtration structures. These structures typically have a metal screen fixedly installed within the melt flow channel of the die. As the melt flows along the channel, the mesh of the screen intercepts impurities, allowing clean melt that meets particle size requirements to pass through and enter subsequent molding processes. However, over long-term use, as impurities accumulate on the screen, the filtration area gradually decreases, leading to increased melt flow resistance. This not only affects the efficiency and stability of injection molding but may also cause the screen to break due to excessive local pressure, thus losing its filtration effect. Therefore, to maintain the normal operation of the screen-type filter die, it is necessary to regularly clean the screen. The existing cleaning methods for impurities intercepted on the screen mainly involve manually disassembling the die head and replacing the screen with a new one, or using a scraper to scrape off impurities from the surface and mesh of the screen. However, this cleaning method has significant problems. The scraper can only remove some blocky impurities on the surface of the screen, and it is difficult to effectively remove small impurities embedded in the mesh. As a result, the filtration performance of the screen cannot be fully restored, and the screen still needs to be replaced after multiple cleanings, which increases the cost of consumables. In addition, the process of manually disassembling, scraping, and reassembling the screen is time-consuming, requiring the normal production of the plastic extruder to be suspended, which seriously reduces the continuous operating efficiency of the equipment. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a screenless filter head with a backwash cleaning structure, enabling efficient backwash cleaning of the filter plates without downtime and without the consumption of filter screen consumables.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A screenless filter head with a backwash cleaning structure includes a filter assembly and a switching mechanism. The filter assembly is equipped with a feeding assembly, a discharging assembly, and a slag discharge mechanism that can communicate with it. The filter assembly has a backwash medium input structure for cleaning the screenless filter plate and an internal screenless filter plate with filter holes. The feeding assembly is used to feed the material to be filtered into the filter assembly. The backwash medium input structure is used to input the backwash medium for cleaning the screenless filter plate into the filter assembly. The discharging assembly is used to discharge the filtered material. The slag discharge mechanism is used to discharge the impurities generated during backwash cleaning. The switching mechanism links the feeding assembly, the discharging assembly, and the slag discharge mechanism to switch the on / off state of the corresponding channels to achieve filtration or backwash cleaning.

[0005] Preferably, the filter assembly includes an outer shell with outer shell plates at both ends and at least one mounting cavity inside. The filter assembly includes a filter module, with the meshless filter plate disposed in the filter module. The filter module is located within the mounting cavity. The outer shell has a feeding channel, a discharging channel, and a slag discharge channel. The feeding component is connected to the filter assembly through the feeding channel, the discharging component is connected to the filter assembly through the discharging channel, and the slag discharge mechanism is connected to the filter assembly through the slag discharge channel.

[0006] Preferably, there are two placement cavities symmetrically arranged inside the outer shell, and two filter modules are provided, each located in one of the two placement cavities. There are two sets of feeding channels and two sets of slag discharge channels, each corresponding to one of the two placement cavities on the outer shell. The two sets of feeding channels and two sets of slag discharge channels are symmetrically distributed. Each set of feeding channels and two sets of discharge channels has two channels. There are two discharge channels, and the two discharge channels are symmetrically arranged, each corresponding to one of the two placement cavities on the outer shell.

[0007] Preferably, the filtration module includes a support plate, a first filter plate, and a second filter plate. The support plate, the first filter plate, and the second filter plate are stacked sequentially to form a filtration group. The filtration module has two filtration groups, which are symmetrically arranged and the second filter plates on the two filtration groups are in contact. The support plate on the filtration group closest to the outer shell is connected to the outer shell. Both the first filter plate and the second filter plate are meshless filter plates with filter holes. The pore diameter of the first filter plate is smaller than that of the second filter plate. The support plate has a feed inlet and a discharge outlet. The feed inlet corresponds to the feed channel of the outer shell, and the discharge outlet corresponds to the discharge channel of the outer shell. The second filter plate has a discharge outlet. The discharge outlets of the second filter plates of the two filtration groups in the filtration group are aligned to form a complete discharge outlet, which corresponds to the discharge channel on the outer shell.

[0008] Preferably, the feeding assembly includes a feeding plate, which is fixed to one side of the outer casing where a feeding interface is provided. The feeding plate is symmetrically provided with feeding channels that correspond to two sets of feeding channels. The side of the feeding plate corresponding to the feeding channels is provided with a channel opening corresponding to the feeding channels. There are two sets of channel openings, which correspond to the two sets of feeding channels and the feeding channels, respectively. The feeding plate is also symmetrically provided with movable grooves, which are respectively connected to the two feeding channels and the two sets of channel openings.

[0009] Preferably, the discharge assembly includes a discharge plate and a discharge pipe. The discharge plate is fixed to the side of the outer shell where the discharge channel is provided. The discharge plate has a discharge hole. An outlet is provided on the side of the discharge plate corresponding to the discharge hole. The discharge hole is connected to the discharge channel and the outlet of the outer shell respectively. The discharge pipe is fixed to the discharge plate and connected to the outlet. The discharge plate is also provided with a movable groove that communicates with the discharge hole and the outlet.

[0010] Preferably, the slag discharge mechanism includes a slag discharge plate, which is fixed to the side of the outer shell where the slag discharge channel is provided. The slag discharge plate has two sets of slag discharge holes that correspond to the two sets of slag discharge channels respectively. The slag discharge plate also has symmetrical movable grooves, and the two movable grooves are respectively connected to the two sets of slag discharge holes.

[0011] Preferably, the switching mechanism includes a first switching mechanism, a second switching mechanism, and a third switching mechanism. The first switching mechanism has two movable slots symmetrically arranged on the feed plate. The first switching mechanism includes a first driving component and a first switching plate. The first driving component is fixed on the outside of the feed plate. The output shaft of the first driving component is fixedly connected to the first switching plate. The first switching plate is slidably arranged in the movable slot of the feed plate. The first switching plate has a through-hole.

[0012] Preferably, the second switching mechanism includes a second driving component and a second switching plate. The second driving component is fixed on the outside of the discharge plate. The output shaft of the second driving component is fixedly connected to the second switching plate. The second switching plate is slidably disposed in the discharge movable groove of the discharge plate. The second switching plate is provided with a second through-hole.

[0013] Preferably, the switching mechanism three is provided with two movable slots symmetrically arranged on the discharge plate. The switching mechanism includes a driving component three and a switching plate three. The driving component three is fixed on the outside of the slag discharge plate. The output shaft of the driving component three is fixedly connected to the switching plate three. The switching plate three is slidably arranged in the movable slot of the slag discharge plate. The switching plate three is provided with a through-hole three.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention replaces traditional filter screens with meshless filter plates, eliminating the need for screen replacements and reducing consumable costs. Through backflushing media, it thoroughly cleans fine impurities from the filter pores, achieving a cleaning effect superior to scraping. Two filter modules can alternate between filtration and backflushing, avoiding manual disassembly and scraping, effectively improving equipment operating efficiency. The filter plates are free from scraper scratches, have stable pore sizes, and can maintain precise filtration over a long period, preventing secondary contamination of the melt. It is suitable for injection molding mass production needs and solves the problems of poor cleaning effect, long cleaning time, and high consumable costs associated with existing mesh-type filter heads. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a first cross-sectional view of the present invention. Figure 3 This is a view showing the positions of the feed channel and discharge channel of this utility model; Figure 4 This is a second cross-sectional view of the present invention; Figure 5 This is a view showing the location of the slag discharge channel of this utility model; Figure 6 This is an exploded view of the feeding assembly structure of this utility model; Figure 7 This is a view showing the position of the opening in this utility model; Figure 8 This is a structural view of the discharge assembly of this utility model; Figure 9 This is an exploded view of the slag discharge assembly structure of this utility model; Figure 10 This is an exploded view of the filter module structure of this utility model.

[0017] Drawing number explanation: 1. Feeding assembly; 11. Feeding plate; 12. Feeding channel; 13. Channel opening; 14. Movable groove; 2. Filtering assembly; 21. Outer shell; 211. Outer shell plate; 22. Filtering module; 221. Support plate; 222. Filter plate one; 223. Filter plate two; 224. Feeding port; 225. Discharge port; 226. Slag discharge port; 23. Feeding channel; 24. Discharge channel; 25. Slag discharge channel; 3. Material assembly; 31. Discharge plate; 32. Discharge channel; 33. Discharge pipe; 34. Outlet; 4. Slag discharge mechanism; 41. Slag discharge plate; 42. Slag discharge channel; 5. Switching mechanism one; 51. Drive component one; 52. Switching plate one; 53. Through port one; 6. Switching mechanism two; 61. Drive component two; 62. Switching plate two; 63. Through port two; 7. Switching mechanism three; 71. Drive component three; 72. Switching plate three; 73. Through port three. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0020] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0021] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0022] Example: Please see Figure 1-10The filter head with a backwash cleaning structure includes a filter assembly 2 and a switching mechanism. The filter assembly 2 is equipped with a feeding assembly 1, a discharging assembly 3, and a slag discharge mechanism 4 that can communicate with it. The filter assembly 2 is equipped with a backwash medium input structure for cleaning the filter plate without a screen. The filter plate without a screen with filter holes is installed inside. The feeding assembly 1 is used to feed the material to be filtered into the filter assembly 2. The backwash medium input structure is used to input the backwash medium for cleaning the filter plate without a screen into the filter assembly 2. The discharging assembly 3 is used to discharge the filtered material. The slag discharge mechanism 4 is used to discharge the impurities generated by the backwash cleaning. The switching mechanism links the feeding assembly 1, the discharging assembly 3, and the slag discharge mechanism 4 to switch the on / off of the corresponding passage to achieve filtration or backwash cleaning.

[0023] The filter assembly 2 includes an outer shell 21, with outer shell plates 211 at both ends of the outer shell 21. At least one mounting cavity is provided inside the outer shell 2. The filter assembly 2 includes a filter module 22, with a meshless filter plate disposed in the filter module 22. The filter module 22 is located in the mounting cavity. The outer shell 21 is provided with a feed channel 23, a discharge channel 24, and a slag discharge channel 25. The feed assembly 1 is connected to the filter assembly 2 through the feed channel 23. The discharge assembly 3 is connected to the filter assembly 2 through the discharge channel 24. The slag discharge mechanism 4 is connected to the filter assembly 2 through the slag discharge channel 25.

[0024] There are two placement cavities symmetrically arranged inside the outer shell 21. There are two filter modules 22, which are located in the two placement cavities respectively. There are two sets of feeding channels 23 and slag discharge channels 25, which correspond to the two placement cavities on the outer shell 21 respectively. The two sets of feeding channels 23 and the two sets of slag discharge channels 25 are symmetrically distributed. Each set of feeding channels 23 and discharge channels 24 has two. There are two discharge channels 24. The two discharge channels 24 are symmetrically arranged and correspond to the two placement cavities on the outer shell 21 respectively.

[0025] Filter module 22 includes a support plate 221, filter plate one 222, and filter plate two 223. The support plate 221, filter plate one 222, and filter plate two 223 are stacked sequentially to form a filter group. Filter module 22 has two filter groups, which are symmetrically arranged and the filter plates two 223 on the two filter groups are in contact. The support plate 221 on the filter group closer to the outer shell plate 211 is connected to the outer shell plate 211. Filter plate one 222 and filter plate two 223 are both meshless filter plates with filter holes. The filter hole diameter of filter plate one 222 is smaller than that of filter plate two 223. The support plate 221 has a feed inlet 224 and a slag discharge outlet 226. The feed inlet 224 corresponds to the feed channel 23 of the outer shell 21, and the slag discharge outlet 226 corresponds to the slag discharge channel 25 of the outer shell 21. Filter plate two 223... The filter assembly has a discharge port 225. The discharge ports 225 of the two filter plates 223 in the filter assembly are aligned to form a complete discharge port 225. The discharge port 225 corresponds to the discharge channel 24 on the outer shell 21. The support plate 221 on the side of the outer shell 211 can be integrally formed with it. The support plate 221 on the side facing the filter plate 222 has multiple support rods integrally formed with it. The support rods are used to support and improve stability. The two filter plates 223 on the filter assembly are integrally formed with support blocks to improve support stability. The support rods and support blocks can also be used to bear pressure, thereby avoiding the filter plates 222 and 223 from bearing too much pressure and protecting them from deformation due to excessive force.

[0026] The feeding assembly 1 includes a feeding plate 11, which is fixed on the side of the outer shell 21 where the feeding interface is provided. The feeding plate 11 is symmetrically provided with feeding channels 12 that correspond to two sets of feeding channels 23. The side of the feeding plate 11 corresponding to the feeding channels 12 is provided with channel openings 13 that correspond to the feeding channels 12. There are two sets of channel openings 13, which correspond to the two sets of feeding channels 23 and the feeding channels 12, respectively. The feeding plate 11 is also symmetrically provided with movable grooves 14, which are connected to the two feeding channels 12 and the two sets of channel openings 13, respectively.

[0027] The discharge assembly 3 includes a discharge plate 31 and a discharge pipe 33. The discharge plate 31 is fixed on the side of the outer shell 21 where the discharge channel 24 is provided. The discharge plate 31 has a discharge channel 32. The side of the discharge plate 31 corresponding to the discharge channel 32 has an outlet 34. The discharge channel 32 is connected to the discharge channel 24 and the outlet 34 of the outer shell 21 respectively. The discharge pipe 33 is fixed on the discharge plate 31 and connected to the outlet 34. The discharge plate 31 is also provided with a movable groove 14 that is connected to the discharge channel 32 and the outlet 34.

[0028] The slag discharge mechanism 4 includes a slag discharge plate 41, which is fixed on the side of the outer shell 21 where the slag discharge channel 25 is provided. The slag discharge plate 41 has two sets of slag discharge holes 42 that correspond to the two sets of slag discharge channels 25 respectively. The slag discharge plate 41 also has symmetrical movable grooves 14, which are connected to the two sets of slag discharge holes 42 respectively.

[0029] The switching mechanism includes a first switching mechanism 5, a second switching mechanism 6, and a third switching mechanism 7. The first switching mechanism 5 has two movable slots 14 symmetrically arranged on the feed plate 11. The first switching mechanism 5 includes a first driving member 51 and a first switching plate 52. The first driving member 51 is fixed on the outside of the feed plate 11. The output shaft of the first driving member 51 is fixedly connected to the first switching plate 52. The first switching plate 52 is slidably arranged in the movable slots 14 of the feed plate 11.

[0030] The switching mechanism 26 includes a driving component 261 and a switching plate 262. The driving component 261 is fixed on the outside of the discharge plate 31. The output shaft of the driving component 261 is fixedly connected to the switching plate 262. The switching plate 262 is slidably disposed in the discharge movable groove 14 of the discharge plate 31.

[0031] The switching mechanism 37 is provided with two symmetrical movable slots 14 on the discharge plate 31. The switching mechanism includes a driving component 371 and a switching plate 372. The driving component 371 is fixed on the outside of the slag discharge plate 41. The output shaft of the driving component 371 is fixedly connected to the switching plate 372. The switching plate 372 is slidably disposed in the movable slots 14 of the slag discharge plate 41.

[0032] When this utility model is in use, during the input of injection molding material, the opening 53 of the switching plate 52 on the switching mechanism 1 5 is connected to the feed channel 12, the channel opening 13 and the feed channel 23 respectively. Both sets of feed channels 23 on the switching plate 1 52 are connected. The opening 63 of the switching plate 2 62 on the switching mechanism 2 6 is connected to the discharge channel 32, the outlet 34 and the discharge channel 24. The opening 73 of the switching plate on the switching mechanism 3 7 is completely offset from the slag discharge channel 42 and the slag discharge channel 25, and the slag discharge channel 25 is closed. During the flow of the molten plastic, it passes sequentially through the feed channel 12 of the feed assembly 1, the through-hole 53 on the switching plate 52, the channel 13, the feed channel 23 on the outer shell 21, the feed port 224 on the support plate 221, and the chamber between the support plate 221 and the filter plate 222. Under pressure, the molten plastic passes through the filter holes of the filter plate 222 and enters the chamber between the filter plate 222 and the filter plate 223. Subsequently, the molten plastic passes through the filter holes of the filter plate 223 and enters the intermediate flow channel between the two filter plates 223. Then, it passes sequentially through the aligned discharge port 225, the discharge channel 24 on the outer shell 21, the discharge channel 32 on the discharge assembly 3, the through-hole 63 on the switching plate 62, the outlet 34, and the discharge pipe 33, finally completing the filtration of the molten plastic. Impurities in the melt are intercepted by filter plate 222, deposited in the cavity between support plate 221 and filter plate 222, and accumulate at slag discharge port 226. The steps for backflushing and cleaning are as follows: 1. Enclose the discharge channel 24 and part of the feed channel 23 When the switching mechanism 26 is activated, its driving component 261 drives the switching plate 262 to move, so that the through port 263 on the switching plate 262 is completely misaligned with the discharge channel 32, thereby closing the discharge channel 24. When the switching mechanism 5 is activated, its driving component 51 drives the switching plate 52 to move, so that the switching plate 52 closes one of the feeding channels 23 of the corresponding group, while the other feeding channel 23 of the group remains open. For example, when backflushing and cleaning the filter plate 222 on the left side of the filter module 22, it is necessary to close the left feeding channel 23 of the group, while the right feeding channel 23 of the group remains open.

[0033] 2. Open the slag discharge passage and introduce backflushing medium. When the switching mechanism 37 is activated, the driving component 371 drives the switching plate 372 to move, so that the through-hole 373 corresponds to the slag discharge channel 42. Then, the backflushing medium is input, entering through the right-side feed channel 23 on the feed assembly 1, which is still open. It then passes sequentially through the through-hole 53 on the switching plate 152, the through-hole 13 connected to the right-side feed channel 23, the feed channel 23 connected to the right-side feed channel 23, the feed inlet 224 of the right-side support plate 221 on the filter module 22, and the chamber between the right-side support plate 221 and the right-side filter plate 222. The backflushing medium forms high pressure in the chamber, causing backflushing. The medium passes through the filter holes of the right filter plate 222 and the two filter plates 222 into the left filter plate 222 of the filter module 22. It impacts the filter holes of the left filter plate 222 in the reverse direction, pushing out the impurities in the filter holes of the left filter plate 222. The impurities fall into the chamber between the left support plate 221 and the left filter plate 222. Subsequently, the impurities are pushed by compressed air and discharged through the slag discharge port 226 of the left support plate 221 of the filter module 22, the slag discharge channel 42 of the slag discharge channel 25, and the opening of the switching plate 72, thereby completing the backflushing cleaning of the left filter plate in the filter module 22.

[0034] When it is necessary to backflushing and cleaning the filter plate on the right side of the filter module 22, the feed channel 12 on the right side is closed according to the above steps to ensure the conduction of the feed channel 12 on the left side, so that the backflushing medium enters the filter plate 222 on the right side from the feed channel 12 on the left side for backflushing and cleaning, thereby completing the sequential cleaning of the filter plates 222 on both sides of the filter module 22.

[0035] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A meshless filter head with a backwash cleaning structure, characterized in that, It includes a filter assembly (2) and a switching mechanism. The filter assembly (2) is provided with a feeding assembly (1), a discharging assembly (3) and a slag discharge mechanism (4) that can be connected thereto. The filter assembly (2) is provided with a backwash medium input structure for cleaning the meshless filter plate, and has a meshless filter plate with filter holes inside. The feeding assembly (1) is used to feed the material to be filtered into the filter assembly (2), the backwash medium input structure is used to input the backwash medium for cleaning the meshless filter plate into the filter assembly (2), the discharge assembly (3) is used to discharge the filtered material, and the slag discharge mechanism (4) is used to discharge the impurities generated by backwash cleaning. The switching mechanism is linked with the feeding component (1), the discharging component (3) and the slag discharge mechanism (4) to switch the opening and closing of the corresponding passages to achieve filtration or backflushing cleaning; The switching mechanism includes switching mechanism one (5), switching mechanism two (6) and switching mechanism three (7); The switching mechanism (5) is provided with two movable slots (14) symmetrically arranged on the feed plate (11). The switching mechanism (5) includes a driving component (51) and a switching plate (52). The driving component (51) is fixed on the outside of the feed plate (11). The output shaft of the driving component (51) is fixedly connected to the switching plate (52). The switching plate (52) is slidably arranged in the movable slot (14) of the feed plate (11). The switching plate (52) is provided with a through-hole (53). The switching mechanism 2 (6) includes a driving component 2 (61) and a switching plate 2 (62). The driving component 2 (61) is fixed on the outside of the discharge plate (31). The output shaft of the driving component 2 (61) is fixedly connected to the switching plate 2 (62). The switching plate 2 (62) is slidably disposed in the discharge movable groove (14) of the discharge plate (31). The switching plate 2 (62) is provided with a through port 2 (63). The switching mechanism three (7) is provided with two movable slots (14) symmetrically arranged on the discharge plate (31). The switching mechanism also includes a driving component three (71) and a switching plate three (72). The driving component three (71) is fixed on the outside of the slag discharge plate (41). The output shaft of the driving component three (71) is fixedly connected to the switching plate three (72). The switching plate three (72) is slidably arranged in the movable slot (14) of the slag discharge plate (41). The switching plate three (72) is provided with a through port three (73).

2. The meshless filter head with a backwash cleaning structure according to claim 1, characterized in that: The filter assembly (2) includes an outer shell (21), with outer shell plates (211) at both ends of the outer shell (21) and at least one mounting cavity inside. The filter assembly (2) includes a filter module (22), with the meshless filter plate disposed in the filter module (22) and the filter module (22) located inside the mounting cavity. The outer shell (21) is provided with a feeding channel (23), a discharging channel (24) and a slag discharge channel (25). The feeding component (1) is connected to the filter component (2) through the feeding channel (23). The discharging component (3) is connected to the filter component (2) through the discharging channel (24). The slag discharge mechanism (4) is connected to the filter component (2) through the slag discharge channel (25).

3. The meshless filter head with a backwash cleaning structure according to claim 2, characterized in that: The housing cavity is provided in two symmetrically arranged inside the outer shell (21), and the filter module (22) is provided in two and located in the two housing cavities respectively; The feeding channel (23) and the slag discharge channel (25) are provided in two sets, and are respectively corresponding to the two placement cavities on the outer shell (21). The two sets of feeding channels (23) and the two sets of slag discharge channels (25) are symmetrically distributed. Each set of feeding channels (23) and discharge channels (24) has two. The discharge channels (24) are provided in two. The two discharge channels (24) are symmetrically arranged and are respectively corresponding to the two placement cavities on the outer shell (21).

4. The meshless filter head with a backwash cleaning structure according to claim 3, characterized in that: The filter module (22) includes a support plate (221), a first filter plate (222) and a second filter plate (223). The support plate (221), the first filter plate (222) and the second filter plate (223) are stacked in sequence to form a filter group. The filter module (22) has two filter groups. The two filter groups are symmetrically arranged and the second filter plates (223) on the two filter groups are in contact. The support plate (221) on the filter group closer to the outer shell plate (211) is connected to the outer shell plate (211). Both filter plate one (222) and filter plate two (223) are meshless filter plates with filter holes, and the filter hole diameter of filter plate one (222) is smaller than that of filter plate two (223). The support plate (221) is provided with a feed inlet (224) and a slag discharge outlet (226). The feed inlet (224) corresponds to the feed channel (23) of the outer shell (21). The slag discharge outlet (226) corresponds to the slag discharge channel (25) of the outer shell (21). The filter plate (223) is provided with a discharge outlet (225). The discharge outlets (225) of the two filter plates (223) in the filter group are aligned to form a complete discharge outlet (225). The discharge outlet (225) corresponds to the discharge channel (24) on the outer shell (21).

5. The meshless filter head with a backwash cleaning structure according to claim 1, characterized in that: The feeding assembly (1) includes a feeding plate (11), which is fixed on one side of the outer shell (21) where the feeding interface is provided. The feeding plate (11) is symmetrically provided with feeding channels (12) that correspond to the two sets of feeding channels (23). The feed plate (11) has a channel opening (13) on one side corresponding to the feed channel (12). There are two sets of channel openings (13), and the two sets of channel openings (13) correspond to the two sets of feed channels (23) and the feed channel (12) respectively. The feed plate (11) is also symmetrically provided with movable grooves (14), and the two movable grooves (14) are respectively connected to two feed channels (12) and two sets of channel openings (13).

6. The meshless filter head with a backwash cleaning structure according to claim 5, characterized in that: The discharge assembly (3) includes a discharge plate (31) and a discharge pipe (33). The discharge plate (31) is fixed on one side of the outer shell (21) where a discharge channel (24) is provided. The discharge plate (31) has a discharge hole (32) and an outlet (34) is provided on the side of the discharge plate (31) corresponding to the discharge hole (32). The discharge channel (32) is connected to the discharge channel (24) and the outlet (34) of the outer shell (21) respectively, and the discharge pipe (33) is fixed on the discharge plate (31) and connected to the outlet (34); The discharge plate (31) is also provided with a movable groove (14) that communicates with the discharge channel (32) and the outlet (34).

7. The meshless filter head with a backwash cleaning structure according to claim 6, characterized in that: The slag discharge mechanism (4) includes a slag discharge plate (41), which is fixed on the side of the outer shell (21) where a slag discharge channel (25) is provided. The slag discharge plate (41) has two sets of slag discharge holes (42) respectively corresponding to the two sets of slag discharge channels (25). The slag discharge plate (41) is also symmetrically provided with movable grooves (14), and the two movable grooves (14) are respectively connected to two sets of slag discharge channels (42).

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