Pulping machine

By installing electrical information detection elements on the grinding mill, the grinding wheel spacing can be adjusted in real time, solving the problem of inaccurate grinding wheel gap adjustment, improving food safety and production efficiency, and reducing the risk of equipment damage.

CN121623908APending Publication Date: 2026-03-10BEIJING KANGDELI INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-30
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

Inaccurate adjustment of the grinding wheel gap in a pulping machine makes it difficult to balance the grinding particle size and equipment safety, affecting the protein extraction rate and equipment lifespan, and also causing inconvenience in operation and posing food safety risks.

Method used

An electrical information detection element is installed on the grinding machine. By acquiring the electrical information from the power unit, the distance between the first and second grinding discs can be adjusted in real time, avoiding visual observation and manual measurement. The distance can be judged and precisely adjusted using electrical information.

Benefits of technology

It enables precise and rapid adjustment of the grinding wheel gap in the pulper, improving food safety and production efficiency, reducing the risk of power unit burnout and excessive paste temperature rise, and enhancing operational convenience.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present disclosure relates to a pulping machine comprising: a base; the grinding part is arranged on the base and comprises a first grinding piece and a second grinding piece which are oppositely arranged, a grinding cavity communicated with the outside is formed between the first grinding piece and the second grinding piece, and the distance between the first grinding piece and the second grinding piece is adjustable; the power part is used for driving the first abrasive disc or the second abrasive disc to rotate around the central axis of the first abrasive disc or the second abrasive disc; and the electric information detection element is connected with the power part and is used for acquiring electric information of the power part, and the electric information comprises at least one of current, voltage and resistance data. Therefore, the distance between the first abrasive disc and the second abrasive disc can be adjusted in real time according to the obtained electric information condition, the food safety in the food manufacturing process is improved, and meanwhile the distance between the first abrasive disc and the second abrasive disc can be accurately and rapidly adjusted; and the situation that the power part is burnt out or the temperature of ground paste is too high due to improper distance adjustment is reduced, and the production efficiency is improved.
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Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of food processing, in particular, to a grinding machine. BACKGROUND

[0002] The grinding machine needs to adjust the gap of the grinding wheel frequently during use. Generally, the finer the grinding is, the higher the protein extraction rate will be. However, the grinding fineness is directly related to the gap of the grinding wheel. The smaller the gap is, the finer the grinding particle size is. However, if the gap of the grinding wheel of the grinding machine is adjusted to be very small, it will cause the motor to burn or the paste temperature to be too high, which is not only not conducive to the service life of the equipment, but also not conducive to protein extraction. For the adjustment of the gap of the grinding wheel, all operators currently use the method of adjusting by feeling with hands and observation, which has no quantitative standard. Not only will there be a big error in the feeling of each person, but also it is impossible to determine the specific situation of the gap so as to balance the grinding particle size and the safety of the equipment. When adjusting by feeling, it is also very inconvenient for the user and the manager to operate. At the same time, the gap is also felt by hand, which will pollute the paste and affect food safety. SUMMARY

[0003] The purpose of the present disclosure is to provide a grinding machine to solve the problem of inaccurate adjustment of the grinding wheel of the grinding machine in the related art.

[0004] In order to achieve the above-mentioned purpose, the present disclosure provides a grinding machine, comprising: a base; a grinding part arranged on the base, the grinding part comprising a first grinding plate and a second grinding plate arranged oppositely, a grinding cavity in communication with the outside being arranged between the first grinding plate and the second grinding plate, and the distance between the first grinding plate and the second grinding plate being adjustable; a power part for driving the first grinding plate or the second grinding plate to rotate around the center axis thereof; and an electric information detection element connected to the power part for acquiring electric information of the power part, the electric information comprising at least one of current, voltage and resistance data.

[0005] Optionally, the electric information detection element is a digital ammeter.

[0006] Optionally, the first grinding plate is movable along the center axis thereof to adjust the distance between the first grinding plate and the second grinding plate, the power part is in transmission connection with the second grinding plate to drive the second grinding plate to rotate around the center axis thereof.

[0007] Optionally, the grinding part comprises: an adjusting sleeve extending along the center axis of the first grinding plate, the adjusting sleeve being fixed oppositely to the first grinding plate along the direction of the center axis; and A fixed sleeve is fixedly connected with the base, the fixed sleeve is sleeved outside the adjusting sleeve, and the adjusting sleeve is threadedly connected with the fixed sleeve to drive the first abrasive disc to move along the central axis.

[0008] Optionally, the first abrasive disc is fixedly connected with the adjusting sleeve.

[0009] Optionally, a first flange is fixedly connected with the first abrasive disc, and a first limiting structure is arranged between the first flange and the base to relatively fix the first abrasive disc and the base along a circumferential direction of the first abrasive disc. A second limiting structure is arranged between the first flange and the adjusting sleeve to rotatably connect the adjusting sleeve and the first flange and relatively fix the adjusting sleeve along a direction of the central axis.

[0010] Optionally, the first limiting structure comprises: a fixed rod fixedly connected with the base and extending in parallel with the central axis of the first abrasive disc, and a limiting end fixedly connected with the first flange and extending outward in a radial direction of the first abrasive disc, the limiting end being capable of abutting against the fixed rod to limit the first abrasive disc along the circumferential direction of the first abrasive disc.

[0011] Optionally, the first flange is sleeved outside the adjusting sleeve, and the second limiting structure comprises: an annular groove arranged on an inner circumferential surface of the first flange, and a protrusion fixedly connected with an outer circumferential surface of the adjusting sleeve and matched with the annular groove, the protrusion being slidably connected in the annular groove.

[0012] Optionally, the first flange comprises: a flange body, the annular groove being arranged on a first end surface of the flange body; and a flange cover detachably connected with the first end surface.

[0013] Optionally, the grinding part further comprises a locking handle sleeved outside the adjusting sleeve, the locking handle being threadedly connected with the adjusting sleeve to abut against an end surface of the fixed sleeve.

[0014] By the technical scheme, the electric information detection element is installed on the refiner, the electric information of the power part is acquired to determine the distance between the first grinding plate and the second grinding plate according to the electric information, so that the distance between the first grinding plate and the second grinding plate can be adjusted in real time according to the acquired electric information, without the need of naked eye observation or hand touching the first grinding plate or the second grinding plate for measurement, which not only improves the food safety in the food manufacturing process, but also accurately and quickly adjusts the distance between the first grinding plate and the second grinding plate, reduces the situation that the power part is burnt or the ground paste is overheated due to improper distance adjustment, and improves the production efficiency.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings: Figure 1 is a schematic view of a refiner according to an embodiment of the present disclosure.

[0017] Figure 2 is a top view of a refiner according to an embodiment of the present disclosure.

[0018] Figure 3 is a side view of a refiner according to an embodiment of the present disclosure.

[0019] Figure 4 is Figure 3 a semi-sectional view of part A based on the above.

[0020] Figure 5 is a schematic view of a refiner according to another embodiment of the present disclosure.

[0021] Figure 6 is a top view of a refiner according to another embodiment of the present disclosure.

[0022] BRIEF DESCRIPTION OF DRAWINGS 1 - base; 11 - bottom plate; 12 - base; 2 - grinding part; 20 - grinding cavity; 21 - first grinding plate; 211 - first flange; 2110 - flange body; 2111 - limiting end; 2112 - annular groove; 2113 - flange cover; 22 - second grinding plate; 221 - second flange; 23 - adjusting sleeve; 231 - adjusting handle; 232 - protrusion; 24 - fixing rod; 25 - fixing sleeve; 251 - fixing branch end; 26 - locking handle; 27 - grinding cover; 271 - discharge port; 28 - tray; 3 - rotating shaft; 4 - power part; 41 - driving piece; 42 - transmission piece; 5 - electric information detection element; 6 - hopper. DETAILED DESCRIPTION

[0023] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0024] In the present disclosure, the orientation words such as "upper" and "lower" are defined with respect to the arrangement direction of the refiner during actual use, and the orientation words such as "inner" and "outer" are defined with respect to the outline of the corresponding components. The use of the terms "first", "second", and the like is intended to distinguish different components, and does not have sequential and important meanings. In addition, in the following description, the same reference numerals in different drawings represent the same or similar elements, unless otherwise explained.

[0025] According to an embodiment of the present disclosure, as shown in Figures 1 to 6 A refiner can be provided, which can include a base 1, a grinding part 2, a power part 4, and an electrical information detection element 5. The grinding part 2 is arranged on the base 1, and the grinding part 2 includes a first grinding plate 21 and a second grinding plate 22 arranged oppositely, a grinding cavity 20 in communication with the outside is arranged between the first grinding plate 21 and the second grinding plate 22, and the distance between the first grinding plate 21 and the second grinding plate 22 is adjustable. The power part 4 can be used to drive the first grinding plate 21 or the second grinding plate 22 to rotate around its own center axis, so that the first grinding plate 21 and the second grinding plate 22 can grind raw materials in the grinding cavity 20. The electrical information detection element 5 can be connected to the power part 4, and is used to obtain electrical information of the power part 4, the electrical information including at least one of current, voltage, and resistance data.

[0026] Through the above technical solution, the electrical information detection element 5 is installed on the refiner, and the electrical information of the power part 4 is obtained to determine the distance between the first grinding plate 21 and the second grinding plate 22 according to the electrical information, so that the distance between the first grinding plate 21 and the second grinding plate 22 can be adjusted in real time according to the obtained electrical information, without the need for naked eye observation or manual measurement of the first grinding plate 21 or the second grinding plate 22. Not only the food safety in the food manufacturing process is improved, but also the distance between the first grinding plate 21 and the second grinding plate 22 can be accurately and quickly adjusted, reducing the situation that the power part 4 is burned or the ground paste is overheated due to improper adjustment of the distance, and improving the production efficiency.

[0027] It should be noted that the electrical information detection element 5 can be a digital display ammeter to detect the current of the power unit 4 and display the current data in real time for operator observation. The current magnitude is inversely proportional to the gap between the first grinding plate 21 and the second grinding plate 22; the larger the current, the smaller the gap between the first grinding plate 21 and the second grinding plate 22. The magnitude of the current can be used to determine whether the gap adjustment is appropriate, thereby adjusting the gap between the first grinding plate 21 and the second grinding plate 22. The electrical information detection element 5 can also be a voltmeter or a ohmmeter; this disclosure does not limit its application to this. Furthermore, the electrical information detection element 5 can also be connected to a controller, which can convert the acquired electrical information data into gap data between the first grinding plate 21 and the second grinding plate 22 in real time and project it onto the controller's display screen; this disclosure again does not limit its application to this.

[0028] Regarding the configuration of the grinding chamber 20, such as... Figure 1 and Figure 3 As shown, the grinding chamber 20 can be formed between the first grinding disc 21 and the second grinding disc 22, and gradually narrows from the center to both sides. The feed end of the grinding chamber 20 is located at the center of the grinding chamber 20, and the discharge end of the grinding chamber 20 is located on both sides of the grinding chamber 20. Since soybeans gradually move from the center to the outside under the action of centrifugal force after entering the grinder, with feed in the center and discharge on the outside, and with the center height being higher and the outside height being smaller, the movement trajectory of the soybeans driven by the grinder can more easily grind the soybeans and improve the grinding efficiency. The grinder may also include a hopper 6 detachably set above the grinding section 2, and the hopper 6 can be connected to the grinding chamber 20 through the adjusting sleeve 23. The hopper 6 can prevent raw materials from splashing when feeding into the grinding chamber 20. In addition, the hopper 6 can also be an automatic feeding hopper, that is, the hopper 6 can be filled with material first, and the hopper 6 can automatically connect to the grinding chamber 20 at intervals to release some raw materials into it. This disclosure does not limit this.

[0029] Furthermore, such as Figure 1 and Figure 3As shown, the first grinding disc 21 can move along its own central axis to adjust the distance between it and the second grinding disc 22. The power unit 4 can be connected to the second grinding disc 22 to drive the second grinding disc 22 to rotate around its own central axis. The grinder may also include a rotating shaft 3, which is disposed in the base 1 and can be connected to the second grinding disc 22 via a second flange 221 on the second grinding disc 22. The power unit 4 is connected to the rotating shaft 3 and can drive the rotating shaft 3 to rotate. Here, the power unit 4 may include a drive member 41, which may be a motor. The output end of the motor is connected to the rotating shaft 3, and the rotation of the motor drives the rotating shaft 3 to rotate. The base 1 may also include a base plate 11 and a base 12. The base plate 11 may be a hollow structure, and the base 12 may be disposed above the base plate 11. The grinding part 2 is disposed above the base 12, and the rotating shaft 3 is located in the base 12. The power unit 4 may also include a transmission component 42. The drive component 41 is disposed above the base plate 11, and the transmission component 42 is disposed in the base plate 11. The transmission component 42 is connected to the output end of the drive component 41 and the rotating shaft 3 respectively. In this way, the drive component 41 can be installed on the same side as the refiner, which facilitates the overall placement of the refiner, reduces the height of the refiner, and also facilitates the installation and maintenance of the refiner.

[0030] Furthermore, such as Figures 1 to 3 As shown, the grinding unit 2 may include an adjusting sleeve 23 and a fixed sleeve 25. The adjusting sleeve 23 extends along the central axis of the first grinding disc 21, and the adjusting sleeve 23 and the first grinding disc 21 are fixed relative to each other along the central axis. The fixed sleeve 25 is fixedly connected to the base 1, and the fixed sleeve 25 can be sleeved on the outside of the adjusting sleeve 23. The adjusting sleeve 23 and the fixed sleeve 25 can be threaded together to drive the first grinding disc 21 to move along the central axis. By rotating the adjusting sleeve 23 and the fixed sleeve 25, the moving speed of the first grinding disc 21 can be slowly adjusted to avoid the first grinding disc 21 colliding with the second grinding disc 22 and damaging either of them if the adjustment force is too large. Thus, when it is necessary to adjust the position of the first grinding disc 21, rotating the adjusting sleeve 23 will cause the first grinding disc 21 to move due to the axial fixation between the adjusting sleeve 23 and the first grinding disc 21, thereby adjusting the distance between the first grinding disc 21 and the second grinding disc 22.

[0031] Here, the adjusting sleeve 23 may have two ends that extend out of the fixed sleeve 25. One end may be connected to the first grinding plate 21, and the other end may be fixedly connected to an adjusting handle 231. The adjusting handle 231 may extend radially away from the adjusting sleeve 23. When adjusting, the adjusting handle 231 may be held and turned to more conveniently adjust the position of the adjusting sleeve 23 relative to the fixed sleeve 25.

[0032] Regarding the connection method between the first grinding disc 21 and the adjusting sleeve 23, the first grinding disc 21 can be fixedly connected to the adjusting sleeve 23. In this way, when the adjusting sleeve 23 and the fixed sleeve 25 are locked, the first grinding disc 21 is also limited in the circumferential direction, and when the second grinding disc 22 rotates, it will not drive the first grinding disc 21 to rotate.

[0033] In addition, the first grinding disc 21 can also be rotatably connected relative to the adjusting sleeve 23. Specifically, a first flange 211 can be fixedly connected to the first grinding disc 21. A first limiting structure is provided between the first flange 211 and the base 1, so that the first grinding disc 21 and the base 1 are relatively fixed along the circumference of the first grinding disc 21. A second limiting structure is provided between the first flange 211 and the adjusting sleeve 23, so that the adjusting sleeve 23 and the first flange 211 are rotatably connected and relatively fixed along the direction of the central axis. That is, the adjusting sleeve 23 can only rotate circumferentially along the first flange 211, and the first flange 211 can limit the adjusting sleeve 23 axially. With the cooperation of the first limiting structure, the first grinding disc 21 does not rotate when the adjusting sleeve 23 adjusts the distance between the first grinding disc 21 and the second grinding disc 22. In addition, the first limiting structure keeps the first grinding disc 21 fixed in the circumferential direction, which can also effectively improve the grinding effect between the first grinding disc 21 and the second grinding disc 22.

[0034] Furthermore, such as Figure 3 As shown, the first limiting structure may include a fixing rod 24 and a limiting end 2111. The fixing rod 24 can be fixedly connected to the base 1 and extends parallel to the central axis of the first grinding disc 21. Here, the number of fixing rods 24 can be set to two. The limiting end 2111 can be fixedly connected to the first flange 211 and extends radially outward along the first grinding disc 21. The limiting end 2111 can abut against the fixing rod 24 to limit the first grinding disc 21 along its circumference. Thus, when the adjusting sleeve 23 adjusts the distance between the first grinding disc 21 and the second grinding disc 22, the first grinding disc 21 does not rotate because the limiting end 2111 abuts against the fixing rod 24. The limiting ends 2111 can both have U-shaped openings that engage with the fixing rod 24, or one limiting end 2111 can be rotatably connected to one fixing rod 24, while the other limiting end 2111 forms a bayonet that detachably engages with the other fixing rod 24. This disclosure does not limit this specific configuration.

[0035] In addition, the fixed sleeve 25 can also be fixedly connected to the base 1 by the fixed rod 24. Specifically, the outer side of the fixed sleeve 25 can also form two fixed supports 251. One fixed support 251 can be rotatably connected to one fixed rod 24, and the other fixed support 251 can form a bayonet to be detachably engaged with the other fixed rod 24. This disclosure does not limit this.

[0036] According to one embodiment of this disclosure, such asFigure 3 and Figure 4 As shown, the first flange 211 can be sleeved on the outside of the adjusting sleeve 23, and the second limiting structure can include an annular groove 2112 and a protrusion 232. The annular groove 2112 can be provided on the inner circumferential surface of the first flange 211, and the protrusion 232 can be fixedly connected to the outer circumferential surface of the adjusting sleeve 23 and match the annular groove 2112. The protrusion 232 can be slidably connected in the annular groove 2112. Here, the contact surfaces of the protrusion 232 and the annular groove 2112 can both be arc-shaped structures to reduce friction when they rotate relative to each other. When the adjusting sleeve 23 rotates relative to the fixed sleeve 25, the protrusion 232 can slide in the annular groove 2112. At the same time, the adjusting sleeve 23 can maintain relative fixation with the first flange 211 along the central axis direction through the protrusion 232, thereby driving the first flange 211 to move along the central axis.

[0037] Furthermore, to facilitate the assembly between the adjusting sleeve 23 and the first flange 211, such as... Figure 4 As shown, the first flange 211 may include a flange body 2110 and a flange cover 2113. An annular groove 2112 may be provided on the inner periphery of the first end face of the flange body 2110. The flange cover 2113 may be detachably connected to the first end face. Specifically, the flange cover 2113 may have multiple bolts spaced circumferentially to engage with the first end face, allowing the flange cover 2113 to abut against the protrusion 232 in the axial direction of the adjusting sleeve 23. This provides an upper limit for the adjusting sleeve 23 in the axial direction, preventing it from dislodging from the first flange 211 and affecting its adjustment of the first grinding disc 21. During assembly, the flange body 2110 can be first fitted onto the outside of the adjusting sleeve 23, with the protrusion 232 of the adjusting sleeve 23 accommodated in the annular groove 2112. Then, the flange cover 2113 is fastened to the first end face with multiple bolts to prevent the protrusion 232 from dislodging from the annular groove 2112.

[0038] According to one embodiment of this disclosure, such as Figure 1 and Figure 3As shown, the grinding unit 2 may also include a locking handle 26 sleeved on the outside of the adjusting sleeve 23. The locking handle 26 is threadedly connected to the adjusting sleeve 23 and is located on the side of the fixed sleeve 25 away from the first grinding disc 21, so as to abut against the end face of the fixed sleeve 25. The function of the locking handle 26 is to provide locking force, so that the adjusting sleeve 23 and the fixed sleeve 25 are fixed more tightly, preventing the first grinding disc 21 from rotating when the power unit 4 drives the second grinding disc 22 to rotate too fast. Before adjusting the distance between the first grinding disc 21 and the second grinding disc 22, the locking handle 26 can be rotated to loosen it, so that the locking handle 26 is spaced apart from the fixed sleeve 25. Then, the adjusting sleeve 23 is adjusted to move the first grinding disc 21. After the adjusting sleeve 23 adjusts the distance between the first grinding disc 21 and the second grinding disc 22 to the target distance, the locking handle 26 is rotated to tighten it until the locking handle 26 abuts against the end face of the fixed sleeve 25.

[0039] According to one embodiment of this disclosure, such as Figures 1 to 6 As shown, the grinding unit 2 may further include a grinding cover 27, which covers the outside of the first grinding disc 21 and the second grinding disc 22. The grinding cover 27 has a discharge port 271, which communicates with the grinding chamber 20. The grinding cover 27 effectively prevents slurry from splashing to the outside during the grinding process, thus avoiding not only the loss of finished slurry but also impacting the external environment. The structure of the grinding cover 27 combined with the discharge port 271 facilitates the collection of the ground slurry.

[0040] Furthermore, such as Figure 1 and Figure 3 As shown, the grinding section 2 may further include a material tray 28 circumferentially disposed outside the second grinding disc 22. The material tray 28 is disposed on the base 1 and located within the grinding cover 27. The material tray 28 is located below the grinding chamber 20 and is used to receive the material discharged from the grinding chamber 20. Here, for ease of material discharge, the material tray 28 may be inclined, and the side of the material tray 28 near the discharge port 271 is lower than the side of the material tray 28 away from the discharge port 271. Figure 2 As shown, the outlet 271 can be located on the side of the grinding shroud 27 away from the drive member 41, or it can be as follows: Figure 5 and Figure 6 As shown, the discharge port 271 is located in front of the grinding cover 27. Both configurations are designed to avoid the drive component 41 in order to prevent interference with the drive component 41 and affect the discharge.

[0041] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0042] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0043] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A refiner, characterized in that, The grinding device comprises: a base; a grinding part arranged on the base, the grinding part comprising a first grinding plate and a second grinding plate arranged oppositely, a grinding cavity in communication with the outside being arranged between the first grinding plate and the second grinding plate, and the distance between the first grinding plate and the second grinding plate being adjustable; a power part for driving the first grinding plate or the second grinding plate to rotate around the central axis thereof; and an electric information detection element connected to the power part for acquiring electric information of the power part, the electric information comprising at least one of current, voltage and resistance data. The electric information detection element is a digital ammeter.

2. A pulp mill according to claim 1, characterized in that The first grinding plate is movable along the central axis thereof to adjust the distance between the first grinding plate and the second grinding plate.

3. The pulp mill according to claim 1, characterized in that, The power part is in transmission connection with the second grinding plate to drive the second grinding plate to rotate around the central axis thereof. The grinding part comprises:

4. A pulp mill according to claim 3, characterized in that an adjusting sleeve extending along the central axis of the first grinding plate, the adjusting sleeve being fixed oppositely to the first grinding plate along the direction of the central axis; and a fixed sleeve fixedly connected to the base, the fixed sleeve being sleeved outside the adjusting sleeve, the adjusting sleeve being in screw connection with the fixed sleeve to enable the first grinding plate to move along the central axis. The first grinding plate is fixedly connected to the adjusting sleeve.

5. A pulp mill according to claim 4, characterized in that A first flange is fixedly connected to the first grinding plate, a first limiting structure being arranged between the first flange and the base to enable the first grinding plate and the base to be fixed oppositely along the circumferential direction of the first grinding plate.

6. The pulp mill according to claim 4, characterized in that A second limiting structure is arranged between the first flange and the adjusting sleeve to enable the adjusting sleeve and the first flange to be rotatably connected and fixed oppositely along the direction of the central axis. The first limiting structure comprises:

7. A pulp mill according to claim 6, characterized in that a fixed rod fixedly connected to the base and extending in parallel to the central axis of the first grinding plate, and a limiting end fixedly connected to the first flange and extending outward in the radial direction of the first grinding plate, the limiting end being capable of abutting against the fixed rod to limit the first grinding plate along the circumferential direction of the first grinding plate. The first flange is sleeved outside the adjusting sleeve, the second limiting structure comprising:

8. A pulp mill according to claim 6, characterised in that an annular groove arranged on the inner circumferential surface of the first flange, and a protrusion fixedly connected to the outer circumferential surface of the adjusting sleeve and matched with the annular groove, the protrusion being in sliding connection in the annular groove. The first flange comprises:

9. A pulp mill according to claim 8, characterized in that a flange body, the annular groove being arranged on the first end surface of the flange body; and a flange cover detachably connected to the first end surface. The grinding part further comprises a locking handle sleeved outside the adjusting sleeve, the locking handle being in screw connection with the adjusting sleeve to abut against the end surface of the fixed sleeve.

10. The pulp mill of claim 4, wherein, ​