Grinding and filtering structure

Abstract

A grinding and filtering structure, comprising a grinding and filtering tube body (3) integrally formed by a grinding tube (1) and a filtering tube (2), wherein a grinding and filtering cylinder cover (4) capable of rotating in an inner cavity of the grinding tube is provided in the grinding tube, outer wall grooves (5) distributed in an array are provided at a bottom end of the grinding and filtering cylinder cover in a circumferential direction, and a buffering and collecting slot (6) is provided at the bottom of the grinding and filtering cylinder cover. By using the grinding and filtering tube body in cooperation with the grinding and filtering cylinder cover and a filtering assembly, when the grinding and filtering cylinder cover is driven, bottom grooves (9) and bottom ridges (11) can be subjected to a circumferential dislocation movement to grind substances that need to be ground; under the action of the centrifugal force from a circular motion and gravity, the ground substances automatically pass through a filter screen, thus completing an entire grinding and filtering process; and during the process, there is no need to transfer or clean the ground substances, thereby avoiding the problem of contamination or loss of the ground substances during transfer.

Description

A grinding filter structure TECHNICAL FIELD

[0001] The present application relates to the technical field of biotechnology, in particular to a grinding filter structure. BACKGROUND

[0002] In daily life and work, many scenes need to grind animal and plant tissues or seeds into small particles such as single cells. After grinding, in order to ensure the uniformity of the ground material, a filter screen or filter membrane is usually used to filter out larger particles.

[0003] At present, the commonly used grinding methods include manual pestle crushing, mechanical rotary shearing, machine zirconium bead centrifugal shock grinding, chemical dissociation digestion, ultrasonic crushing, etc., each of which has advantages and disadvantages and application scenarios.

[0004] After the above grinding methods, the ground material basically needs to be transferred to a centrifuge tube or other vessel for further separation and enrichment. In the process of transferring, in order to obtain relatively uniform and pure ground material, a filtering operation is usually required. In the process of transferring and filtering, there is a risk of sample loss and contamination.

[0005] A single type of grinding filter can only adapt to a single type of collection vessel for single use according to the size of the volume of the ground material. Subsequently, manual transfer of the ground material is required. Therefore, the single type of grinding filter cannot meet the adaptive use of multiple types of collection vessels, and the application demand is limited.

[0006] The existing grinding filter structure is complex, inconvenient to clean, and has dead angles, which can cause reactions with other substances when grinding different substances subsequently, and is not convenient for subsequent experiments, affecting experimental data. SUMMARY

[0007] The present application provides a grinding filter structure to solve the problems in the background art.

[0008] To solve the above technical problems, the technical scheme adopted by the present application is:

[0009] The application discloses a grinding and filtering structure which comprises a grinding and filtering pipe body integrally formed by a grinding pipe and a filtering pipe, an array of outer wall grooves is formed on the bottom end of a grinding and filtering cylinder cover which is rotatable in the inner cavity of the grinding pipe, a buffer collecting groove is formed on the bottom of the grinding and filtering cylinder cover, a bottom hole is formed on the inner wall of the buffer collecting groove and is communicated with the inner cavity of the grinding and filtering cylinder cover, a limiting hole is formed at the center of the bottom of the grinding and filtering cylinder cover, a bottom groove is formed on the bottom surface of the grinding and filtering cylinder cover in a circumferential array with the limiting hole as the center, a limiting protrusion is arranged at the center of the inner bottom wall of the grinding pipe and is rotatable with the limiting hole, a plurality of bottom protrusions are arranged on the inner bottom wall of the grinding pipe in a circumferential array with the limiting protrusion as the center, a discharging port is formed on one side of the grinding pipe, and a detachable filtering assembly is arranged at the discharging port.

[0010] The filtering pipe comprises an annular plate connected to the bottom of the grinding pipe, an arc-shaped pipe connected to the annular plate and the grinding pipe, a first arc-shaped plate connected to the outer wall of the arc-shaped pipe and an arc-shaped nozzle communicated with the bottom of the arc-shaped pipe.

[0011] Preferably, the filtering assembly comprises two anti-overflow plates connected to the grinding pipe, a fixing frame clamped on the anti-overflow plates and a filter screen clamped on the inner side of the fixing frame, and the two anti-overflow plates are symmetrically arranged with the discharging port as the axis of symmetry.

[0012] Preferably, a clamping groove is formed on the anti-overflow plate, a hook plate is clamped in the clamping groove and the hook plate is fixedly connected to the fixing frame.

[0013] Preferably, a positioning groove is formed on the inner side of the fixing frame and the filter screen is clamped in the positioning groove.

[0014] Preferably, a drag-reducing and dirt-preventing ring is arranged on the outer wall of the grinding and filtering cylinder cover and is arranged at the top end of the outer wall groove.

[0015] Preferably, a second arc-shaped plate is fixedly connected to the bottom of the grinding pipe and the axis core of the second arc-shaped plate is same as that of the annular plate.

[0016] Preferably, a first supporting plate and a second supporting plate are fixedly connected to the bottom of the grinding pipe, one side of the first supporting plate is fixedly connected to the outer wall of the second arc-shaped plate and one side of the second supporting plate is fixedly connected to the arc-shaped pipe.

[0017] Preferably, the bottom end of the arc-shaped nozzle is lower than that of the first arc-shaped plate and the axis core of the first arc-shaped plate is same as that of the arc-shaped nozzle.

[0018] Preferably, an array of anti-skid concave lines is formed on the top end of the grinding and filtering cylinder cover in a circumferential array.

[0019] Preferably, the second support plate is provided with a balance opening at the bottom.

[0020] By adopting the technical scheme, the application has the following beneficial effects:

[0021] In the application, the grinding filter tube body is integrally formed with the grinding tube and the filter tube, and is matched with the grinding filter cartridge cover and the filter assembly, so that when the grinding filter cartridge cover is driven by external force, the bottom groove and the bottom protrusion can move circumferentially to grind the material to be ground, and the ground material can automatically pass through the filter screen under the centrifugal force and gravity in the circumferential motion, so that the complete grinding and filtering process is completed, and the material to be ground does not need to be transferred and cleaned, and the problem of pollution or loss of the material to be ground in the transfer process is avoided.

[0022] In the application, the filter tube is composed of the annular plate, the arc-shaped tube, the first arc-shaped plate and the arc-shaped nozzle, so that the outer wall of the annular plate can be matched with the 50ml centrifugal tube, the outer wall of the first arc-shaped plate can be matched with the 15ml centrifugal tube, and the outer wall of the arc-shaped nozzle can be matched with the 5ml centrifugal tube, so as to ensure that the grinding and filtering structure is suitable for various collection tubes, and has high practicability.

[0023] In the application, the operator can take out the grinding filter cartridge cover from the grinding tube, then take down the fixing frame from the grinding filter tube body, and take down the filter screen from the fixing frame, so that the plurality of components are separated, no dead angle is left during cleaning or washing, the cleaning is thorough, the residual material does not react with other materials to affect the experimental data, the overall structure is simple and the number is small, the application is easy to process and mass produce, the production cost is greatly reduced, the time for assembly and maintenance of the operator is reduced, and the efficiency is improved.

[0024] In the application, the design cooperation of the outer wall groove, the bottom groove and the bottom protrusion enables the material not fully ground to be driven to move by the groove with a larger size in the outer wall groove, and to flow back to the gap between the bottom groove and the bottom protrusion for re-grinding under the action of gravity until the material is fully ground, so as to prevent the material not fully ground from blocking the filter screen and ensure the smooth feeding in the grinding process.

[0025] In the application, the design cooperation of the limiting hole and the limiting protrusion and the design of the anti-pollution ring enable the grinding filter cartridge cover, the grinding tube and the collection tube not to be easily eccentric during the circumferential motion, and thus the grinding effect is ensured.

[0026] In the present application, through the design of the first support plate and the second support plate, the first support plate can be used to support the second arc-shaped plate and the grinding pipe at the same time, and the second support plate can be used to support the arc-shaped pipe and the grinding pipe at the same time, and then the first support plate and the second support plate are supported to form a T-shaped structure with the above-mentioned connection and cooperation, so that the bottom of the grinding pipe can be kept flat without deformation under the condition of less material and thinner, thereby ensuring the uniformity and stability during grinding. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a schematic diagram of the overall structure of the present application;

[0028] Fig. 2 is a schematic diagram of the bottom structure of the grinding filter cartridge cover of the present application;

[0029] Fig. 3 is a schematic diagram of the inner cavity structure of the grinding filter cartridge cover of the present application;

[0030] Fig. 4 is a schematic diagram of the internal structure of the grinding pipe of the present application;

[0031] Fig. 5 is a schematic diagram of the enlarged structure at A in Fig. 4;

[0032] Fig. 6 is a schematic diagram of the fixing frame structure of the present application;

[0033] Fig. 7 is a schematic diagram of the bottom structure of the grinding filter pipe body of the present application;

[0034] Fig. 8 is a schematic diagram of the cross-sectional structure of the grinding filter pipe body of the present application.

[0035] In the drawings: 1, grinding pipe; 2, filter pipe; 21, annular plate; 22, arc-shaped pipe; 23, first arc-shaped plate; 24, arc-shaped nozzle; 3, grinding filter pipe body; 4, grinding filter cartridge cover; 5, outer wall groove; 6, buffer collection groove; 7, bottom hole; 8, limiting hole; 9, bottom groove; 10, limiting protrusion; 11, bottom protrusion; 12, discharging port; 13, anti-overflow plate; 14, fixing frame; 15, filter screen; 16, clamping groove; 17, hook plate; 18, positioning groove; 19, anti-fouling ring; 20, second arc-shaped plate; 30, first support plate; 40, second support plate; 50, anti-skid concave groove; 60, balance port. DETAILED DESCRIPTION

[0036] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application will be further described below in combination with the drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0037] Many specific details are set forth in the following description in order to provide a thorough understanding of the application. However, the application can be practiced according to the claims without resorting to the details specifically set forth in the following description. Embodiment

[0038] As shown in FIG. 1-8, the present application provides a grinding filter structure, which comprises a grinding filter tube body 3 integrally formed by a grinding tube 1 and a filter tube 2, the grinding tube 1 is provided with a grinding filter cylinder cover 4 which can rotate in the inner cavity of the grinding tube 1, the bottom end of the grinding filter cylinder cover 4 is provided with an array of outer wall grooves 5 in the circumferential direction, the bottom of the grinding filter cylinder cover 4 is provided with a buffer collection groove 6, the inner wall of the buffer collection groove 6 is provided with a bottom hole 7 which communicates with the inner cavity of the grinding filter cylinder cover 4, and the bottom center of the grinding filter cylinder cover 4 is provided with a limiting hole 8, the bottom surface of the grinding filter cylinder cover 4 is provided with a circumferential array of bottom grooves 9 with the limiting hole 8 as the center point, and the inner bottom wall of the grinding tube 1 is provided with a circumferential array of bottom protrusions 11 with the limiting protrusion 10 as the center point, one side of the grinding tube 1 is provided with a discharging port 12, and the discharging port 12 is provided with a detachable filter assembly.

[0039] The filter tube 2 comprises an annular plate 21 connected to the bottom of the grinding tube 1, an arc-shaped tube 22 connected to the annular plate 21 and the grinding tube 1, a first arc-shaped plate 23 connected to the outer wall of the arc-shaped tube 22, and an arc-shaped nozzle 24 connected to the bottom of the arc-shaped tube 22.

[0040] Specifically, the collection tube for collecting grinding materials can be freely selected from various types of commercialized 5ml centrifuge tubes, 15ml centrifuge tubes, 50ml centrifuge tubes, glass tubes, culture bottles, etc. according to actual conditions, wherein the outer wall of the annular plate 21 is used to match the 50ml centrifuge tube, the outer wall of the first arc-shaped plate 23 is used to match the 15ml centrifuge tube, and the outer wall of the arc-shaped nozzle 24 is used to match the 5ml centrifuge tube.

[0041] Specifically, the bottom grooves 9 are composed of eight groups of semicircular grooves with different lengths, and the bottom protrusions 11 are composed of eight groups of semicircular protrusions with different lengths. The design of the semicircular grooves of the bottom grooves 9 can reduce the wear during contact with the bottom protrusions 11, thereby improving the service life of the grinding filter device.

[0042] Specifically, when the grinding filter cylinder cover 4 is assembled in the grinding tube 1, the limiting protrusion 10 corresponds to the limiting hole 8 and is located in the limiting hole 8, which ensures that the grinding filter cylinder cover 4 will not be severely eccentric, thereby affecting the grinding effect.

[0043] Specifically, the size of the inner cavity of the grinding tube 1 can be adapted to the head of a commonly used laboratory syringe rod, and the operator can use a discarded syringe rod to cooperate with the grinding tube 1 to complete the grinding and filtering operation, thereby achieving waste utilization and further saving costs.

[0044] Specifically, one end of each of the outer wall grooves 5 is in communication with one end of the bottom groove 9, so that the substances that are not sufficiently ground flow back to the gap between the bottom groove 9 and the bottom protrusion 11 under the action of gravity to be ground again until they are sufficiently ground.

[0045] In this embodiment, the filtering assembly includes two anti-overflow plates 13 connected to the grinding tube 1, a fixing frame 14 clamped on the anti-overflow plates 13, and a filter screen 15 clamped on the inner side of the fixing frame 14, and the two anti-overflow plates 13 are symmetrically arranged with the outlet 12 as the axis of symmetry. The anti-overflow plates 13 are provided with clamping grooves 16, the clamping grooves 16 are clamped with hook plates 17, the hook plates 17 are fixedly connected to the fixing frame 14, the inner side of the fixing frame 14 is provided with positioning grooves 18, and the filter screen 15 is clamped in the positioning grooves 18.

[0046] Specifically, the fixing frame 14 can be separated from the grinding and filtering tube body 3 by disassembling the hook plates 17 in the clamping grooves 16, and the positioning grooves 18 facilitate the disassembly and replacement of the filter screen 15, so as to ensure that the filtering device is easy to clean after being disassembled, and the dead angle is also easy to clean, thereby avoiding the problem that incomplete cleaning leads to the reaction of subsequent ground different substances with other substances, affecting experimental data.

[0047] Further specifically, the filter screen 15 for filtering substances is not limited to a mesh shape in use, and the filter screen 15 can be replaced with a filter membrane, so that cell filter screens 15 with various pore sizes can be suitable for animal and plant tissue cells of different sizes.

[0048] In this embodiment, the outer wall of the grinding and filtering cartridge cover 4 is provided with a drag-reducing and anti-fouling ring 19, which is arranged at the top end of the outer wall groove 5. Specifically, the drag-reducing and anti-fouling ring 19 can block the substances that need to be ground from flowing out from the gap between the grinding and filtering cartridge cover 4 and the inner wall of the grinding tube 1, and greatly reduce the frictional resistance of the grinding and filtering cartridge cover 4 and the grinding tube 1 during the mispositioning movement.

[0049] In this embodiment, the bottom of the grinding tube 1 is fixedly connected with a second arc-shaped plate 20, and the axis core of the second arc-shaped plate 20 is the same as that of the annular plate 21. Specifically, when a 50ml centrifuge tube is sleeved on the outer wall of the annular plate 21, a part of the outer wall of the tube mouth can be arranged between the annular plate 21 and the second arc-shaped plate 20, so as to achieve the effect of limiting the tube mouth of the centrifuge tube. In this way, the grinding and filtering structure body and the 50ml centrifuge tube can be prevented from being mispositioned during subsequent grinding, thereby avoiding the problem of increased grinding resistance.

[0050] In the embodiment, the bottom of the grinding tube 1 is fixedly connected with a first support plate 30 and a second support plate 40, one side of the first support plate 30 is fixedly connected to the outer wall of the second arc-shaped plate 20, one side of the second support plate 40 is fixedly connected to the arc-shaped tube 22, and the bottom of the second support plate 40 is provided with a balance port 60. Specifically, the first support plate 30 can be used to support the second arc-shaped plate 20 and the grinding tube 1 at the same time, and the second support plate 40 can be used to support the arc-shaped tube 22 and the grinding tube 1 at the same time. When the first support plate 30 and the second support plate 40 support, they form a T shape with the above-mentioned connection and cooperation, which ensures that the bottom of the grinding tube 1 can remain flat without deformation under the condition of less and thinner material, thereby ensuring the uniformity and stability during grinding.

[0051] Further specifically, the balance port 60 can be used to support and balance the 15ml centrifugal tube sleeved on the outer wall of the first arc-shaped plate 23 and the 5ml centrifugal tube sleeved on the outer wall of the arc-shaped nozzle 24, so that a part of the top end of the 15ml centrifugal tube or the 5ml centrifugal tube can be in contact with the balance port 60 after sleeving, thereby ensuring the stability of the 15ml centrifugal tube and the 5ml centrifugal tube during use and operation.

[0052] In the embodiment, the bottom end of the arc-shaped nozzle 24 is lower than the bottom end of the first arc-shaped plate 23, and the first arc-shaped plate 23 and the arc-shaped nozzle 24 have the same shaft core. Specifically, the lower design of the bottom end of the arc-shaped nozzle 24 facilitates the sleeving of the 5ml centrifugal tube, and the coaxial design of the first arc-shaped plate 23 and the arc-shaped nozzle 24 allows a part of the outer wall of the tube opening of the 5ml centrifugal tube to be located between the inner wall of the first arc-shaped plate 23 and the outer wall of the arc-shaped nozzle 24 after sleeving, thereby achieving the effect of limiting the tube opening of the centrifugal tube. In this way, the problem of misalignment during subsequent grinding can be avoided.

[0053] In the embodiment, the top end of the grinding filter cartridge cover 4 is provided with an array of anti-slip concave patterns 50 distributed in the circumferential direction, which is used for the user to hold the grinding filter cartridge cover 4 and increase the friction.

[0054] The working principle and use process of the present application: before use, according to the grinding requirement of different volume size, the corresponding collection tube needs to be installed on the grinding filter tube body 3, and the collection tube can be freely selected according to the actual situation, such as various commercialized 5ml centrifuge tube, 15ml centrifuge tube, 50ml centrifuge tube, glass tube or culture bottle, etc. The 50ml centrifuge tube is used as an example to illustrate the commonly used 50ml centrifuge tube. First, the 50ml centrifuge tube is sleeved on the outer wall of the annular plate 21, so that the 50ml centrifuge tube is concentric with the annular plate 21 but not fixed, and then the outer wall of the tube mouth is partially arranged between the annular plate 21 and the second arc plate 20, so that the tube mouth of the 50ml centrifuge tube is limited, and finally the 50ml centrifuge tube and the grinding filter structure body are placed on the corresponding test tube rack. When the granular grinding material is used, the operator can directly load it in the inner cavity of the grinding filter cylinder cover 4, and make the granular material fall on the bottom protrusion 11 during grinding. If it is a soft material such as animal tissue, the operator needs to place it on the bottom protrusion 11 first.

[0055] When in use, the operator holds the grinding filter cylinder cover 4 with hand and drives the grinding filter cylinder cover 4 to do circular motion. When the grinding filter cylinder cover 4 does circular motion, the grinding filter cylinder cover 4 rotates and drives the grinding filter tube body 3 to do circular motion around the vertical center of the 50ml centrifuge tube. During the movement, the bottom groove 9 of the grinding filter cylinder cover 4 and the bottom protrusion 11 in the grinding tube 1 can move oppositely, so as to make the transverse shear force and the longitudinal extrusion force fully and uniformly grind the material to be ground, and realize the extrusion and cutting of the material to be ground. During the grinding, the smaller particles after grinding flow to all directions along the bottom groove 9, and are dispersed through the space between the outer wall groove 5 and the inner cavity of the grinding tube 1, so as to realize the screening of the grinding material. The screened and fully ground material can pass through the discharge port 12 under the circular motion of the outer wall groove 5, and after being filtered by the filter screen 15, it enters the filter tube 2 under the action of gravity, and then flows into the 50ml centrifuge tube through the arc tube 22, so as to complete the grinding, filtering and collecting work. After the grinding is completed, the operator removes the grinding filter cylinder cover 4 and the grinding filter tube body 3, and saves or uses the 50ml centrifuge tube and the ground material for other purposes. Based on the above grinding process, the material which is not fully ground is driven to move by the groove with larger size in the outer wall groove 5, and flows back to the gap between the bottom groove 9 and the bottom protrusion 11 under the action of gravity for regrinding until it is fully ground, so as to prevent the material which is not fully ground from blocking the filter screen 15.

[0056] After use, when cleaning or washing is needed, the operator can take out the grinding filter cartridge cover 4, then take off the fixing frame 14 from the grinding filter tube body 3, and then take off the filter screen 15 from the fixing frame 14, so that the plurality of parts are separated, so that no dead angle is formed during cleaning or washing, complete cleaning is facilitated, and the problem that residual substances react with other substances to affect experimental data is avoided.

[0057] Based on the working principle, the grinding and filtering structure can be applied to various commercialized grinding and rotating machines, so that the operator can realize automation without additional purchase of instruments, and the cost is further reduced.

[0058] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "mounting", "connected", "connection", "fixed", and the like should be interpreted broadly, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connected" can be direct connection or indirect connection through an intermediate medium. 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.

[0059] It should be noted that when an element is referred to as "assembled", "mounted", "fixed" or "disposed" on another element, it can be directly on the other element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0060] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like are intended to mean 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 mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] Although embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A grinding and filtering structure, characterized in that: The invention comprises a grinding filter tube body (3) formed integrally of a grinding tube (1) and a filter tube (2), wherein a grinding filter cartridge cover (4) is provided in the grinding tube (1) and can rotate in its inner cavity, the bottom end of the grinding filter cartridge cover (4) is provided with an array of outer wall grooves (5) distributed along the circumferential direction, the bottom of the grinding filter cartridge cover (4) is provided with a buffer collection groove (6), the inner wall of the buffer collection groove (6) is provided with a bottom hole (7) communicating with the inner cavity of the grinding filter cartridge cover (4), and the bottom center of the grinding filter cartridge cover (4) is provided with a bottom hole (7) communicating with the inner cavity of the grinding filter cartridge cover (4). A limiting hole (8) is provided at the bottom surface of the grinding filter cartridge cover (4), a bottom groove (9) is provided in a circular array with the limiting hole (8) as the center point, and a limiting protrusion (10) capable of rotating with the limiting hole (8) is provided at the center of the inner bottom wall of the grinding tube (1), a bottom protrusion (11) is provided in a circular array with the limiting protrusion (10) as the center point, and a discharge port (12) is provided on one side of the grinding tube (1), and a detachable filter assembly is provided at the discharge port (12); The filter tube (2) comprises an annular plate (21) connected to the bottom of the grinding tube (1), an arc tube (22) connected to both the annular plate (21) and the grinding tube (1), a first arc plate (23) connected to the outer wall of the arc tube (22), and an arc nozzle (24) connected to the bottom of the arc tube (22).

2. A grinding and filtering structure according to claim 1, characterized in that: The filter assembly comprises two anti-overflow plates (13) connected to the grinding tube (1), a fixing frame (14) clamped on the anti-overflow plates (13), and a filter screen (15) clamped on the inner side of the fixing frame (14), and the two anti-overflow plates (13) are symmetrically arranged with the lower material port (12) as the symmetry axis.

3. A grinding and filtering structure according to claim 2, characterized in that: A slot (16) is provided on the anti-overflow plate (13), a hook plate (17) is provided in the slot (16), and the hook plate (17) is fixedly connected to the fixing frame (14).

4. A grinding and filtering structure according to claim 2, characterized in that: A positioning groove (18) is provided on the inner side of the fixing frame (14), and the filter screen (15) is clamped in the positioning groove (18).

5. A grinding and filtering structure according to claim 1, characterized in that: The outer wall of the grinding filter cartridge cover (4) is provided with a drag-reducing and anti-fouling ring (19), and the drag-reducing and anti-fouling ring (19) is arranged at the top end of the outer wall groove (5).

6. A grinding and filtering structure according to claim 1, characterized in that: A second arc-shaped plate (20) is fixedly connected to the bottom of the grinding tube (1), and the second arc-shaped plate (20) has the same axis as the annular plate (21).

7. A grinding and filtering structure according to claim 6, characterized in that: A first support plate (30) and a second support plate (40) are fixedly connected to the bottom of the grinding tube (1); one side of the first support plate (30) is fixedly connected to the outer wall of the second curved plate (20); and one side of the second support plate (40) is fixedly connected to the curved tube (22).

8. A grinding and filtering structure according to claim 1, characterized in that: The bottom end of the arc-shaped through-mouth (24) is lower than the bottom end of the first arc-shaped plate (23), and the first arc-shaped plate (23) and the arc-shaped through-mouth (24) have the same axis.

9. A grinding and filtering structure according to claim 1, characterized in that: The top end of the grinding filter cartridge cover (4) is provided with anti-slip grooves (50) distributed in an array along the circumferential direction.

10. The grinding and filtering structure according to claim 7, characterized in that: A balancing opening (60) is provided at the bottom of the second support plate (40).

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