Material filtering device

Abstract

The utility model discloses a material filtering device and relates to the technical field of filtering equipment. The material filtering device comprises a bottom plate, a top plate, a filter membrane, a charging barrel and a filter pressing assembly; a material passing net is arranged on the bottom plate; a material passing opening is formed in the top plate, the top plate and the bottom plate are arranged in parallel, and the material passing opening is located above the material passing net; the filter membrane is arranged between the top plate and the bottom plate; the charging barrel is arranged on the end face, away from the bottom plate, of the top plate, the charging barrel is provided with two openings, one opening of the charging barrel communicates with the material passing opening, and raw materials to be treated are temporarily stored in the charging barrel; the filter pressing assembly comprises an extrusion disc, and the extrusion disc is arranged in the charging barrel; according to the material filtering device provided by the utility model, the pressurizing disc is driven by the filter pressing assembly to push the material to be close to the filter membrane, the material is filtered by the filter membrane and finally passes through the material passing net to be discharged, so that the stable and uniform filtering of the material is conveniently realized, and the material passing net supports the filter membrane, so that the filter membrane is conveniently prevented from being deformed or damaged due to extrusion force; the normal use of the filter membrane is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter equipment technical field especially relates to a material filter device. BACKGROUND

[0002] When pigment liquid, photoresist and a small amount of scarce product and raw material need to be filtered, we must reduce pollution and material loss as much as possible to ensure effective use of resources and product purity. The overall design of the filter on the market is mostly developed for large quantities of raw material filtering production. This kind of filter usually needs more raw materials for filtering, which means relatively more loss in the filtering process, resulting in higher cost. However, in actual application, especially when facing scarce samples, it is often difficult to have a large amount of samples to consume. These scarce samples can only provide a small amount of material, but unfortunately, using the existing filter to filter a small amount of material sample faces many difficulties. Due to the design and working principle of the filter itself, it is often difficult to achieve the ideal filtering effect when processing a small amount of sample, and it may even be unable to start and operate normally due to too small sample amount. Therefore, how to reduce the loss of scarce samples while ensuring the filtering quality has become a technical problem to be solved. SUMMARY

[0003] Therefore, the utility model discloses a material filter device.

[0004] The utility model provides the following technical scheme:

[0005] A material filter device, comprising a bottom plate, a top plate, a filter membrane, a material cylinder and a filter pressing assembly.

[0006] The bottom plate is provided with a material passing net, the top plate is provided with a material passing hole corresponding to the material passing net, the top plate and the bottom plate are arranged in parallel, the material passing hole is located above the material passing net, the filter membrane is arranged between the top plate and the bottom plate, the material cylinder is arranged on the end face of the top plate away from the bottom plate, the material cylinder has two openings, one of the openings of the material cylinder is communicated with the material passing hole, and the material cylinder is used for temporarily storing raw materials to be treated, the filter pressing assembly comprises a pressing disc, the pressing disc is arranged in the material cylinder, the filter pressing assembly can drive the pressing disc to push the raw materials in the material cylinder to approach the filter membrane, and the raw materials pass through the material passing net after being filtered through the filter membrane.

[0007] As a further improvement of the above technical solution, the filter pressing assembly further comprises a pressing rod and a pressing piece, one end of the pressing rod is connected with the end face of the extrusion disc away from the top plate, the other end of the pressing rod is connected with the pressing piece, and the pressing piece provides extrusion force for the pressing rod through its own gravity.

[0008] As a further improvement of the above technical solution, the pressing piece comprises a carrier disc and a weight, the bottom end of the carrier disc is connected with the pressing rod, and the weight is arranged on the carrier disc.

[0009] As a further improvement of the above technical solution, a guide rod is vertically arranged on the carrier disc, a matching hole corresponding to the guide rod is arranged on the weight, and the guide rod penetrates through the matching hole.

[0010] As a further improvement of the above technical solution, the filter pressing assembly further comprises a supporting cover, the supporting cover covers the opening of the barrel away from the top plate, a supporting hole corresponding to the pressing rod is arranged on the supporting cover, and the pressing rod penetrates through the supporting hole.

[0011] As a further improvement of the above technical solution, the top plate and the bottom plate are assembled and connected through connecting pieces, and a plurality of connecting pieces are arranged circumferentially relative to the axis of the barrel.

[0012] As a further improvement of the above technical solution, the connecting pieces are rod-shaped, the connecting pieces are rotatably connected with the top plate, and the connecting pieces penetrate through the bottom plate through threaded connection.

[0013] As a further improvement of the above technical solution, a first sealing ring is arranged between the filter membrane and the top plate, and the first sealing ring surrounds the circumferential side of the material passing port; a second sealing ring is arranged between the filter membrane and the bottom plate, and the second sealing ring surrounds the circumferential side of the material passing net.

[0014] As a further improvement of the above technical solution, the middle part of the bottom plate is an arc surface recessed away from the top plate, and the center position of the material passing net is farthest away from the top plate.

[0015] As a further improvement of the above technical solution, the end face of the bottom plate away from the top plate is provided with a material collecting hopper, and the material collecting hopper is in communication with the material passing net.

[0016] Compared with the related art, the beneficial effects of the present application are:

[0017] The material filtering device provided by the utility model, in the process of filtering treatment of the material, the specific operation process and advantages are as follows: firstly, the operator needs to put the material to be treated into the barrel, which ensures that the material can be orderly prepared for the filtering procedure. Then, the filter pressing assembly is put into the opening on the side of the barrel away from the top plate. At this time, the filter pressing assembly starts to play a role, and the extrusion disc is driven to apply pressure to the inside of the barrel, which promotes the material in the barrel to be extruded and then moves towards the top plate. Under the action of the pressure, the material gradually approaches and finally contacts the filter membrane between the top plate and the bottom plate.

[0018] With the continuous extrusion process, the material to be treated starts to penetrate through the small pores of the filter membrane under the extrusion force of the extrusion disc. The filtered pure material first passes through the material discharge net on the bottom plate under the joint action of gravity and the remaining extrusion force. This cleverly designed material discharge net not only provides a smooth discharge channel for the material, but also plays a crucial supporting role in the structure.

[0019] The filter pressing assembly is used for pressure feeding and filtering of the material, which significantly improves the filtering speed of the material and has a qualitative leap in efficiency compared with the traditional filtering method. At the same time, since the extrusion process is stable and uniform, it ensures that the material will not be damaged or have poor filtering effect due to uneven stress during the filtering process. More importantly, the material discharge net on the bottom plate plays a key supporting role for the filter membrane, effectively avoiding the deformation or damage of the filter membrane under strong extrusion force, which not only prolongs the service life of the filter membrane, but also fundamentally guarantees the stability and reliability of the filtering effect.

[0020] In addition, the utility model adopts the pressure feeding and filtering method for filtering treatment of the material. This method not only optimizes the filtering process, but also greatly improves the flexibility and adaptability of the filtering treatment. Specifically, pressure feeding can accurately and effectively treat the material according to the characteristics and treatment requirements of different raw materials. Whether it is a large amount of material or a small amount of material, pressure feeding can ensure that the material is fully extruded and filtered during the filtering process by adjusting the pressure size and duration, thereby improving the filtering efficiency and quality.

[0021] This feature makes the utility model have a wide range of use scenarios. Whether it is continuous filtering operation in large-scale industrial production or intermittent filtering experiment in small laboratory, the utility model can easily cope with various filtering requirements.

[0022] In order to make the above-mentioned purposes, characteristics and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 A perspective view of the material filtering device in an embodiment of the present application is shown.

[0025] Main element symbol explanation:

[0026] 100 - base plate; 110 - material passing net; 120 - material collecting hopper; 200 - top plate; 210 - material passing opening; 300 - filter membrane; 310 - first sealing ring; 320 - second sealing ring; 400 - material cylinder; 500 - pressure filtering assembly; 510 - extrusion disc; 520 - pressure rod; 530 - pressure piece; 531 - carrier disc; 532 - weight; 533 - guide rod; 540 - support cover; 541 - support hole; 600 - connecting piece. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0029] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0030] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise expressly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0032] As shown in Figure 1 The embodiment of the present application provides a material filtering device, which comprises a bottom plate 100, a top plate 200, a filter membrane 300, a material cylinder 400 and a filter pressing assembly 500.

[0033] The bottom plate 100 is provided with a material passing net 110, and the material passing net 110 has a plurality of mesh holes; the top plate 200 is provided with a material passing hole 210 corresponding to the material passing net 110, the top plate 200 is arranged in parallel with the bottom plate 100, and the material passing hole 210 is located above the material passing net 110; the filter membrane 300 is arranged between the top plate 200 and the bottom plate 100; the material cylinder 400 is arranged on the end face of the top plate 200 away from the bottom plate 100, the material cylinder 400 has two openings, one of the openings of the material cylinder 400 communicates with the material passing hole 210, the material cylinder 400 is used for temporarily storing raw materials to be treated, and the material cylinder 400 is vertically arranged; the filter pressing assembly 500 comprises an extrusion disc 510, and the extrusion disc 510 is arranged in the material cylinder 400; the filter pressing assembly 500 can drive the extrusion disc 510 to push the raw materials in the material cylinder 400 to approach the filter membrane 300, and then pass through the material passing net 110 after being filtered through the filter membrane 300.

[0034] The material filtering device provided by the embodiment, in the process of filtering the material, the specific operation process is as follows: first, the operator needs to put the material to be treated into the barrel 400, and then the filter pressing assembly 500 is put into the opening away from the top plate 200 on the side of the barrel 400. At this time, the filter pressing assembly 500 begins to play a role, by driving the extrusion disc 510 to apply pressure to the inside of the barrel 400, the pressure makes the material in the barrel 400 be extruded and then move towards the top plate 200. Under the action of the pressure, the material gradually approaches and finally contacts the filter membrane 300 between the top plate 200 and the bottom plate 100.

[0035] With the continuous extrusion process, the material to be treated begins to penetrate through the pores on the filter membrane 300 under the extrusion force of the extrusion disc 510. The filtered pure material first passes through the material discharge net 110 on the bottom plate 100 under the joint action of gravity and the remaining extrusion force. The ingenious material discharge net 110 not only provides a smooth discharge channel for the material, but also plays a crucial supporting role in structure.

[0036] By using the filter pressing assembly 500 to pressurize and filter the material, the filtering speed of the material is significantly improved, and the efficiency has a qualitative leap compared with the traditional filtering method. At the same time, since the extrusion process is stable and uniform, it ensures that the material will not cause poor filtering effect or equipment damage due to uneven stress in the filtering process. More importantly, the material discharge net 110 on the bottom plate 100 plays a key supporting role for the filter membrane 300, effectively avoiding the deformation or damage of the filter membrane 300 when it is subjected to strong extrusion force, which not only prolongs the service life of the filter membrane 300, but also fundamentally guarantees the stability and reliability of the filtering effect.

[0037] In addition, the utility model discloses a pressurized filtration method for filtering the material, which not only optimizes the filtering process, but also improves the flexibility and adaptability of the filtering process. Specifically, the pressurized filtration can accurately and effectively treat the material according to the characteristics of different raw materials and processing requirements. Whether it is a large amount of material or a small amount of material, the pressurized filtration can adjust the pressure size and duration to ensure that the material is fully extruded and filtered in the filtering process, thereby improving the filtering efficiency and filtering quality.

[0038] This feature makes the embodiment have a wide range of use scenarios. Whether it is a continuous filtering operation in large-scale industrial production or an intermittent filtering experiment in a small laboratory, the embodiment can easily cope with various filtering requirements.

[0039] In some specific embodiments, the filter pressing assembly 500 further comprises a pressing rod 520 and a pressing piece 530. One end of the pressing rod 520 is connected to the end of the extrusion disc 510 away from the top plate 200, and the other end of the pressing rod 520 is connected to the pressing piece 530. The pressing piece 530 provides extrusion pressure to the pressing rod 520 through its own gravity, which is transmitted to the extrusion disc 510 through the pressing rod 520, so that the extrusion disc 510 can exert a stable and continuous extrusion force on the material.

[0040] Such a design not only improves the working efficiency of the filter pressing assembly 500, but more importantly, it ensures the stability of the material during the filtering process. Since the extrusion disc 510 can provide a stable and uniform extrusion force, the material can be more uniformly extruded during filtering, thereby avoiding problems such as uneven filtering and poor filtering effect caused by unstable extrusion force.

[0041] In some specific embodiments, the pressing piece 530 comprises a carrier disc 531 and a weight 532. The bottom end of the carrier disc 531 is connected to the pressing rod 520, and the weight 532 is arranged on the carrier disc 531. Users can place different numbers or specifications of weights 532 on the carrier disc 531 according to actual needs. By increasing or decreasing the number of weights 532 or replacing weights 532 of different weights, users can easily adjust the extrusion force on the extrusion disc 510.

[0042] This design enables the filter pressing assembly 500 to handle different compositions of material for pressure filtration. Since different compositions of material may require different extrusion forces to achieve optimal filtering effect, by adjusting the number and specifications of weights 532, users can easily achieve precise control of the extrusion force.

[0043] In addition, this adjustment method is simple and convenient to operate. Users do not need complex operations or tools, but simply need to place or remove the weights 532 on the carrier disc 531 to achieve adjustment of the extrusion force. This not only improves working efficiency, but also reduces operation difficulty, making the use of the filter pressing assembly 500 more convenient and flexible.

[0044] In some specific embodiments, a guide rod 533 is vertically arranged on the carrier disc 531, and a matching hole corresponding to the guide rod 533 is arranged on the weight 532, and the guide rod 533 is arranged through the matching hole. This design not only effectively limits the relative position of the weight 532 and the carrier disc 531, prevents the weight 532 from falling off the carrier disc 531 due to external force or vibration during use, but also greatly improves the use safety and reliability of the whole filter pressing assembly 500. Users do not need to worry about the accidental falling of the weight 532, so they can focus more on the material pressure feeding and filtering process, thereby improving the work efficiency and safety.

[0045] In addition, the design of the guide rod 533 and the matching hole also makes the placement and removal of the weight 532 extremely simple. Users only need to align the matching hole on the weight 532 with the guide rod 533 and then place it down, without the need for complex operations or tools. Similarly, when the weight 532 needs to be removed, it can be easily lifted off the guide rod 533, which is convenient and fast.

[0046] In some specific embodiments, the filter pressing assembly 500 further comprises a support cover 540, which is arranged on the opening of the barrel 400 away from the top plate 200, and the support cover 540 is provided with a support hole 541 corresponding to the pressing rod 520, and the pressing rod 520 is arranged through the support hole 541. The design of the support hole 541 not only provides accurate guidance for the movement of the pressing rod 520, but also ensures that the pressing rod 520 will not deviate or shake during use. This design greatly improves the stability and reliability of the filter pressing assembly 500, so that users can more safely perform the material pressure feeding and filtering operation.

[0047] In addition, another important role of the support cover 540 arranged on the opening of the barrel 400 is to prevent foreign matter from entering the barrel 400. In the production environment, there are often various tiny particles, dust or sundries floating in the air. If there is no shielding of the support cover 540, these foreign matters may enter the barrel 400, which will adversely affect the filtering effect of the material. The addition of the support cover 540 can effectively block the invasion of foreign matters, ensuring the cleanliness and working effect of the pressing disc 510 or the material.

[0048] In some specific embodiments, the top plate 200 and the bottom plate 100 are assembled and connected through a connecting piece 600, and a plurality of connecting pieces 600 are arranged circumferentially relative to the axis of the barrel 400, facilitating subsequent disassembly and maintenance.

[0049] In some specific embodiments, the connecting piece 600 is rod-shaped, is rotatably connected with the top plate 200, and is threaded through the bottom plate 100. This threaded connection not only enables the connecting piece 600 to be more firmly fixed on the bottom plate 100, but also allows the distance between the top plate 200 and the bottom plate 100 to be adjusted by rotating the connecting piece 600. This design enables the filter pressing assembly 500 to be adapted to filter membranes 300 of different thicknesses. The user only needs to simply rotate the connecting piece 600 to easily adjust the distance between the top plate 200 and the bottom plate 100, thereby achieving precise control of the thickness of the filter membrane 300. The adjustment process is convenient and fast, and does not require complex tools or operations. The user can easily rotate the connecting piece 600 using hands or simple tools to achieve precise adjustment of the distance between the top plate 200 and the bottom plate 100. This design not only improves the flexibility and adaptability of the filter pressing assembly 500, but also greatly reduces the operation difficulty and time cost, enabling the user to more efficiently perform material pressure filtration operations.

[0050] In some specific embodiments, a first sealing ring 310 is arranged between the filter membrane 300 and the top plate 200, and surrounds the periphery of the material passage 210. The first sealing ring 310 not only effectively prevents material from flowing out of the small gap between the filter membrane 300 and the top plate 200, but also ensures that the material passage 210 and the filter membrane 300 are tightly fitted, thereby improving the filtration efficiency. A second sealing ring 320 is arranged between the filter membrane 300 and the bottom plate 100, and surrounds the periphery of the material passage net 110. The second sealing ring 320 not only prevents material from leaking out of the gap between the filter membrane 300 and the bottom plate 100, but also ensures that the material passage net 110 and the filter membrane 300 are stably connected, further improving the overall performance and reliability of the filter pressing assembly 500.

[0051] In summary, the first sealing ring 310 and the second sealing ring 320 arranged between the filter membrane 300 and the top plate 200 and between the filter membrane 300 and the bottom plate 100, respectively, effectively prevent material from flowing out of the gap between the filter membrane 300 and the top plate 200 or the filter membrane 300 and the bottom plate 100, thereby improving the filtration efficiency and sealing performance of the filter pressing assembly 500.

[0052] In some specific embodiments, the middle part of the bottom plate 100 is concave in the direction away from the top plate 200, and the center of the material passage net 110 is farthest from the top plate 200. During the filter pressing process, the purified material filtered out of the filter membrane 300 naturally flows along the arc surface to the center of the bottom plate 100 and is smoothly discharged through the material passage net 110. This design effectively prevents the purified material from accumulating or flowing out of the side of the bottom plate 100, thereby ensuring efficient collection and purity of the material.

[0053] In addition, the arc surface design of the bottom plate 100 also has a certain buffering effect. During the material pressure conveying process, the arc surface can absorb and disperse part of the impact force, protecting the filter membrane 300 and the bottom plate 100 from being damaged. This design not only improves the durability of the filter pressing assembly 500, but also prolongs its service life.

[0054] In some specific implementations, the end surface of the bottom plate 100 away from the top plate 200 is provided with a material collecting hopper 120, which is in communication with the material passing net 110, facilitating the gathering and discharging of the material discharged from the material passing net 110.

[0055] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and modified by those skilled in the art without contradiction.

[0056] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A material filtering device, characterized by, The utility model relates to a filter press, which comprises a bottom plate (100) with a filter screen (110) arranged thereon, a top plate (200) with a filter opening (210) corresponding to the filter screen (110) and arranged in parallel with the bottom plate (100), a filter membrane (300) arranged between the top plate (200) and the bottom plate (100), a barrel (400) arranged on the end surface of the top plate (200) away from the bottom plate (100), the barrel (400) having two openings, one of which is in communication with the filter opening (210) and is used for temporarily storing raw materials to be treated, and a pressure filter assembly (500) comprising an extrusion disc (510) arranged in the barrel (400). The pressure filter assembly (500) can drive the extrusion disc (510) to push the raw materials in the barrel (400) to approach the filter membrane (300) and pass through the filter screen (110) after being filtered by the filter membrane (300). The pressure filter assembly (500) further comprises a pressure rod (520) and a pressure piece (530), one end of the pressure rod (520) is connected to the end surface of the extrusion disc (510) away from the top plate (200), the other end of the pressure rod (520) is connected to the pressure piece (530), and the pressure piece (530) provides extrusion force for the pressure rod (520) through its own gravity. The pressure piece (530) comprises a carrier disc (531) and a weight (532), the bottom end of the carrier disc (531) is connected to the pressure rod (520), and the weight (532) is arranged on the carrier disc (531). A guide rod (533) is vertically arranged on the carrier disc (531), the weight (532) is provided with a matching hole corresponding to the guide rod (533), and the guide rod (533) penetrates through the matching hole. The pressure filter assembly (500) further comprises a support cover (540), the support cover (540) covers the opening of the barrel (400) away from the top plate (200), the support cover (540) is provided with a support hole (541) corresponding to the pressure rod (520), and the pressure rod (520) penetrates through the support hole (541). The top plate (200) and the bottom plate (100) are assembled and connected through a connecting piece (600), and a plurality of connecting pieces (600) are circumferentially arranged relative to the axis of the barrel (400).

2. The material filtering device of claim 1, wherein, The connecting piece (600) is rod-shaped, the connecting piece (600) is rotatably connected to the top plate (200), and the connecting piece (600) penetrates through the bottom plate (100) through threaded cooperation.

3. The material filtering device of claim 2, wherein, ​ 4. The material filtering device of claim 3, wherein, ​ 5. The material filtering device of claim 2, wherein, ​ 6. The material filtering device of claim 1, wherein, ​ 7. The material filtering device of claim 6, wherein, ​ 8. The material filtering device according to any one of claims 1 to 7, characterized in that A first sealing ring (310) is arranged between the filter membrane (300) and the top plate (200), and surrounds the periphery of the material passing port (210); a second sealing ring (320) is arranged between the filter membrane (300) and the bottom plate (100), and surrounds the periphery of the material passing net (110).

9. The material filtering device according to any one of claims 1 to 7, characterized in that The middle part of the bottom plate (100) is an arc surface concave to the direction away from the top plate (200), and the center of the material passing net (110) is farthest from the top plate (200).

10. The material filtering device according to any one of claims 1 to 7, characterized in that The end surface of the bottom plate (100) away from the top plate (200) is provided with a material collecting hopper (120), and the material collecting hopper (120) is in communication with the material passing net (110).

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