Grinding device and assembly line

Abstract

The embodiment of the utility model relates to the technical field of grinding, and particularly discloses a grinding device and an assembly line, the grinding device comprises a sleeve, a grinding assembly and a driving assembly; the sleeve is provided with a first cavity, and the first cavity is used for containing materials to be ground; the grinding assembly comprises a rotating shaft, a rotating wheel, a connecting piece, a rod pin and a grinding ball, the rotating shaft is rotationally arranged on the sleeve, at least part of the rotating shaft extends into the first cavity, the rotating wheel is arranged on the rotating shaft, one end of the connecting piece is connected with the side of the rotating wheel, the other end of the connecting piece is detachably connected with the rod pin, and the grinding ball is arranged in the first cavity and used for impacting and decomposing to-be-ground materials; the driving assembly is arranged on the sleeve and is in driving connection with the rotating shaft. When the rod pin rotates to drive the grinding ball to impact and decompose the to-be-ground material, and the rod pin is gradually abraded and needs to be replaced, the rod pin and the connecting piece can be detachably connected in the mode, so that the rod pin is convenient to disassemble and assemble, the disassembly and assembly efficiency of the rod pin is improved, and rapid replacement of the rod pin is facilitated.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of grinding, and in particular to a grinding device and an assembly line. Background Art

[0002] Multi-layer ceramic capacitors are essential basic components in the electronics industry. During the preparation of multi-layer ceramic capacitors, in order to make the ceramic powder reach particles of a certain particle size, a grinding device is usually used to grind the ceramic powder to reach particles of a certain particle size. The grinding device mainly includes a rod pin, a runner, a separation wheel, and zirconia balls. The high-speed rotation of the runner drives the rod pin to rotate at a high speed, and then the rod pin drives the zirconia balls to apply impact force and shear force to the ceramic powder, so that the ceramic powder is broken up, so that the ceramic powder reaches particles of a certain particle size. When the ceramic powder reaches particles of a certain particle size, the ceramic powder rises with the airflow generated by the high-speed rotation to the separation wheel, and the separation wheel screens and outputs the ceramic powder. At the same time, the separation wheel blocks the zirconia balls, playing a role in separating the zirconia balls and the ceramic powder. When the runner stops rotating, the zirconia balls fall due to their own gravity.

[0003] Currently, the rod pin is usually of an integrally formed structure, and at least part of the rod pin extends into the side of the runner, and the screw extends from the top of the runner and is screwed and fixed to the rod pin. However, in the grinding device, usually multiple runners are stacked. When multiple runners are stacked, it is easy to block the screw extending from the top of the runner. Therefore, when the rod pin gradually wears and needs to be replaced during long-term grinding, the blockage of the screw by the runner makes the disassembly and assembly of the screw inconvenient, and then the disassembly and assembly of the rod pin is inconvenient, affecting the disassembly and assembly efficiency of the rod pin and being not conducive to the quick replacement of the rod pin. Summary of the Utility Model

[0004] The main technical problem to be solved by the embodiments of the present utility model is to provide a grinding device and an assembly line that can facilitate the disassembly and assembly of the rod pin.

[0005] To solve the above technical problem, one technical solution adopted by the embodiments of the present utility model is: to provide a grinding device, including a sleeve, a grinding assembly, and a driving assembly; the sleeve is provided with a first cavity for accommodating the material to be ground; the grinding assembly includes a rotating shaft, a runner, a connecting piece, a rod pin, and grinding balls. The rotating shaft is rotatably arranged on the sleeve, and at least part of the rotating shaft extends into the first cavity. The runner is arranged on the part of the rotating shaft extending into the first cavity. One end of the connecting piece is connected to the side of the runner, and the other end of the connecting piece is detachably connected to the rod pin. The grinding balls are arranged in the first cavity and are used to impact and decompose the material to be ground; the driving assembly is arranged on the sleeve and is drivingly connected to the rotating shaft.

[0006] Optionally, a screwing portion is provided at one end of the connecting member away from the runner, and the rod pin is provided with a screw hole. The screwing portion is screwed into the screw hole so that the connecting member and the rod pin are detachably connected.

[0007] Optionally, a jack is provided on the side of the runner, and a fastening hole is provided at the top or bottom of the runner. The fastening hole communicates with the jack; one end of the connecting member close to the runner is provided with a notch. One end of the connecting member close to the runner is inserted into the jack, and the notch is aligned with the fastening hole; the grinding assembly further includes a fastener, the fastener is connected to the fastening hole, and the fastener abuts against the inner wall of the notch so that the connecting member is fixed to the runner.

[0008] Optionally, the rod pin is provided with an annular groove, and the groove is used as a judgment reference for the wear degree of the rod pin.

[0009] Optionally, the number of the runners, connecting members and rod pins is multiple. The multiple runners are stacked on the part of the rotating shaft extending into the first cavity. One runner is connected to two connecting members, the two connecting members are oppositely arranged on the one runner, and one connecting member is connected to one rod pin.

[0010] Optionally, along the stacking direction of the multiple runners, the projections of the connecting members of any two adjacent runners deviate, and the projections of the connecting members of any two adjacent runners form a deviation angle.

[0011] Optionally, the grinding assembly further includes a separating wheel. The separating wheel is arranged on the part of the rotating shaft extending into the first cavity. The separating wheel is located above the runner, and the separating wheel is used for rotating and separating the material to be ground and the grinding balls.

[0012] Optionally, at least part of the material of the separating wheel is CUR; and / or the material of the rod pin is CUR.

[0013] Optionally, the sleeve is further provided with a second cavity, a first through port and a second through port. The second cavity is isolated from the first cavity. The second cavity surrounds the first cavity. Both the first through port and the second through port communicate with the second cavity. The first through port and the second through port are arranged at intervals. The first through port, the second cavity and the second through port are sequentially communicated to form a fluid passage, and the fluid passage is used for fluid to flow through.

[0014] To solve the above technical problems, another technical solution adopted in the embodiments of the present invention is: to provide an assembly line, including the above-mentioned grinding device.

[0015] The beneficial effects of the embodiments of the present utility model are as follows: Different from the prior art, the embodiments of the present utility model provide a grinding device, which includes a sleeve, a grinding assembly and a driving assembly; the sleeve is provided with a first cavity for accommodating the material to be ground; the grinding assembly includes a rotating shaft, a runner, a connecting piece, a rod pin and a grinding ball, the rotating shaft is rotatably arranged on the sleeve, at least part of the rotating shaft extends into the first cavity, the runner is arranged on the part of the rotating shaft extending into the first cavity, one end of the connecting piece is connected to the side of the runner, the other end of the connecting piece is detachably connected to the rod pin, the grinding ball is arranged in the first cavity, and the grinding ball is used for hitting and decomposing the material to be ground; the driving assembly is arranged on the sleeve and is drivingly connected to the rotating shaft. When the rod pin rotates to drive the grinding ball to hit and decompose the material to be ground, and the rod pin gradually wears and needs to be replaced, through the above method, the rod pin can be detachably connected to the connecting piece, so that the rod pin is convenient to disassemble and assemble, the disassembly and assembly efficiency of the rod pin is improved, and the rapid replacement of the rod pin is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0017] Figure 1 is a schematic diagram of the overall structure of the grinding device provided by the embodiments of the present utility model;

[0018] Figure 2 is a sectional view of the overall structure of the grinding device provided by the embodiments of the present utility model Figure 1 ;

[0019] Figure 3 is a sectional view of the overall structure of the grinding device provided by the embodiments of the present utility model Figure 2 ;

[0020] Figure 4 is Figure 3 a partial enlarged view of part A in

[0021] Figure 5 is a schematic diagram of a partial structure of the grinding assembly of the grinding device provided by the embodiments of the present utility model Figure 1 ;

[0022] Figure 6 is a schematic diagram of a partial structure of the grinding assembly of the grinding device provided by the embodiments of the present utility model Figure 2 ;

[0023] Figure 7 is a schematic diagram of the deviation angle of the grinding device provided by the embodiments of the present utility model.

[0024] Description of reference numerals:

[0025] 100 grinding device;

[0026] 1 sleeve, 11 first cavity, 12 second cavity, 13 first opening, 14 second opening, 15 cylinder, 16 top cover, 17 bottom cover;

[0027] 2 grinding assembly, 21 rotating shaft, 22 rotating wheel, 221 inserting hole, 222 fastening hole, 23 connecting piece, 231 screw connection part, 232 notch, 24 rod pin, 241 screw hole, 242 groove, 25 separating wheel, 26 fastening piece;

[0028] X deviation angle. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0031] The multilayer ceramic capacitor is an essential basic component in the electronics industry. During the preparation of the multilayer ceramic capacitor, in order to make the ceramic powder reach particles of a certain particle size, a grinding device is usually used to grind the ceramic powder to reach particles of a certain particle size. The grinding device mainly includes rod pins, runner wheels, separation wheels, and zirconia balls. The high-speed rotation of the runner wheel drives the rod pins to rotate at high speed, and then the rod pins drive the zirconia balls to apply impact force and shear force to the ceramic powder, so that the ceramic powder is broken up, so that the ceramic powder reaches particles of a certain particle size. When the ceramic powder reaches particles of a certain particle size, the ceramic powder rises with the airflow generated by the high-speed rotation to the separation wheel, and the ceramic powder is screened and output under the action of the separation wheel. At the same time, the separation wheel blocks the zirconia balls, playing a role in separating the zirconia balls and the ceramic powder. When the runner wheel stops rotating, the zirconia balls fall due to their own gravity.

[0032] At present, the rod pin is usually an integrally formed structure. At least part of the rod pin extends into the side of the runner wheel, and the screw extends from the top of the runner wheel and is screwed to fix the rod pin. However, in the grinding device, usually multiple runner wheels are stacked. When multiple runner wheels are stacked, it is easy to block the screw extending from the top of the runner wheel. Therefore, when the rod pin gradually wears and needs to be replaced during long-term grinding, the blockage of the screw by the runner wheel makes the disassembly and assembly of the screw inconvenient, and then the disassembly and assembly of the rod pin are inconvenient, affecting the disassembly and assembly efficiency of the rod pin and being unfavorable for the quick replacement of the rod pin.

[0033] In view of this, the present utility model provides an embodiment of a grinding device 100. When the rod pin 24 rotates to drive the grinding balls (not shown in the figure) to impact and decompose the material to be ground, and the rod pin 24 gradually wears and needs to be replaced, the rod pin 24 can be detachably connected to the connecting member 23, so that the rod pin 24 is convenient for disassembly and assembly, improving the disassembly and assembly efficiency of the rod pin 24 and contributing to the quick replacement of the rod pin 24.

[0034] For the above-mentioned grinding device 100, please refer to Figures 1 to 3 , the grinding device 100 includes a sleeve 1, a grinding assembly 2, and a driving assembly (not shown in the figure). The sleeve 1 is provided with a first cavity 11 for accommodating the material to be ground. The grinding assembly 2 includes a rotating shaft 21, a runner wheel 22, a connecting member 23, a rod pin 24, and grinding balls (not shown in the figure). The rotating shaft 21 is rotatably arranged on the sleeve 1, and at least part of the rotating shaft 21 extends into the first cavity 11. The runner wheel 22 is arranged on the part of the rotating shaft 21 extending into the first cavity 11. One end of the connecting member 23 is connected to the side of the runner wheel 22, and the other end of the connecting member 23 is detachably connected to the rod pin 24. The grinding balls (not shown in the figure) are arranged in the first cavity 11 and are used for impacting and decomposing the material to be ground. The driving assembly (not shown in the figure) is arranged on the sleeve 1 and is drivingly connected to the rotating shaft 21 for driving the rotating shaft 21 to rotate so that the runner wheel 22 rotates with the rotating shaft 21.

[0035] For the above-mentioned grinding assembly 2, please refer to Figures 4 to 6 , at one end of the connecting member 23 away from the runner 22, a screwing portion 231 is provided. The rod pin 24 is provided with a screw hole 241, and the screwing portion 231 is screwed into the screw hole 241 so that the connecting member 23 and the rod pin 24 are detachably connected. By the above method, the detachable connection between the connecting member 23 and the rod pin 24 can be realized, which helps to quickly replace the rod pin 24, improve the maintenance efficiency of the grinding assembly 2, and reduce the maintenance time.

[0036] It can be understood that the setting of the screwing portion 231 includes but is not limited to being located on the connecting member 23, and the setting of the screw hole 241 includes but is not limited to being located on the rod pin 24. At least one of the connecting member 23 and the rod pin 24 is provided with a screwing portion 231, and the other is provided with a screw hole 241.

[0037] For the above-mentioned grinding assembly 2, please refer to Figures 4 to 6 , a jack 221 is provided on the side of the runner 22, a fastening hole 222 is provided at the top or bottom of the runner 22, the fastening hole 222 communicates with the jack 221, a notch 232 is provided at one end of the connecting member 23 close to the runner 22, one end of the connecting member 23 close to the runner 22 is inserted into the jack 221, the notch 232 is aligned with the fastening hole 222, and the grinding assembly 2 further includes a fastener 26. The fastener 26 is connected to the fastening hole 222 and abuts against the inner wall of the notch 232 so that the connecting member 23 is fixed to the runner 22. By the above method, not only can the stable connection between the connecting member 23 and the runner 22 be realized, but also the runner 22 can be prevented from hindering the disassembly and assembly of the rod pin 24 relative to the connecting member 23.

[0038] It can be understood that the fastener and the fastening hole 222 are connected by at least one of connection methods such as screwing, plugging, clamping, and magnetic attraction.

[0039] For the above-mentioned rod pin 24, in order to conveniently and quickly judge whether the rod pin 24 needs to be replaced, please refer to Figures 4 to 6 , the rod pin 24 is provided with an annular groove 242, and the groove 242 is used as a judgment reference for the wear degree of the rod pin 24. By the above method, the groove 242 plays a role of visual judgment and can intuitively and quickly judge whether the rod pin 24 needs to be replaced.

[0040] For the above-mentioned grinding assembly 2, please refer to Figures 1 to 3, the number of the runner 22, the connecting member 23 and the rod pin 24 are all multiple. A plurality of runners 22 are stacked on the part of the rotating shaft 21 extending into the first cavity 11. One runner 22 is connected to two connecting members 23. The two connecting members 23 are oppositely arranged on one runner 22. One connecting member 23 is connected to one rod pin 24. In the above way, the grinding assembly 2 can process more materials to be ground at the same time, thereby improving the grinding efficiency. That is, the grinding assembly 2 can drive more grinding balls (not shown in the figure) to move repeatedly at the same time, so that a plurality of grinding balls (not shown in the figure) repeatedly impact and decompose more materials to be ground.

[0041] For the above grinding assembly 2, please refer to Figure 7 , along the stacking direction of the plurality of runners 22, the projections of the connecting members 23 of any two adjacent runners 22 deviate, and the projections of the connecting members 23 of any two adjacent runners 22 form a deviation angle X. In the above way, the distribution of the connecting members 23 between any two adjacent runners 22 can be made more uniform, and further the distribution of the grinding force between any two adjacent runners 22 can be made more uniform, preventing the grinding force between any two adjacent runners 22 from being too concentrated and resulting in uneven grinding effect.

[0042] In some embodiments, please refer to Figure 7 , along the stacking direction of the plurality of runners 22, the deviation angle X of the projections of the connecting members 23 of any two adjacent runners 22 is ninety degrees. In the above way, the connecting members 23 between any two adjacent runners 22 can be arranged at the same interval, and further the rod pins 24 between any two adjacent runners 22 can be arranged at the same interval, so that the driving force of the rod pins 24 on the grinding balls (not shown in the figure) is more uniform, which helps the grinding balls (not shown in the figure) to impact and decompose the materials to be ground at different positions in all directions, achieving a more uniform grinding effect.

[0043] For the above grinding assembly 2, in order to facilitate the quick separation of the materials to be ground and the grinding balls (not shown in the figure), please refer to Figures 1 to 3 , the grinding assembly 2 further includes a separating wheel 25. The separating wheel 25 is arranged on the part of the rotating shaft 21 extending into the first cavity 11. The separating wheel 25 is located above the runner 22. The separating wheel 25 is used to rotate and separate the materials to be ground and the grinding balls (not shown in the figure), which is convenient for subsequent collection of the ground materials and recycling of the grinding balls (not shown in the figure). In the above way, when the materials to be ground are decomposed by the impact force and shear force applied by the moving grinding balls (not shown in the figure), the materials to be ground become particles with a certain particle size. And the materials to be ground rise to the separating wheel 25 following the airflow generated by the high-speed rotation. Under the action of the separating wheel 25, the materials to be ground are screened and output from the mixture of the materials to be ground and the grinding balls (not shown in the figure). When the rotating shaft 21 and the runner 22 stop rotating, the grinding balls (not shown in the figure) fall to the bottom of the first cavity 11 due to their own gravity, which is convenient for subsequent recycling of the grinding balls (not shown in the figure).

[0044] In some embodiments, to facilitate the subsequent collection or output of the material to be ground that has passed through the separation wheel 25, the rotating shaft 21 is provided with a collection cavity and a collection channel that communicate with the separation wheel 25. The collection cavity and the collection channel are used to collect or output the material to be ground that has passed through the separation wheel 25.

[0045] For the above-mentioned grinding assembly 2, please refer to Figures 1 to 3 , at least part of the separation wheel 25 is made of CUR, and / or the pin 24 is made of CUR. By the above method, the cost of the grinding assembly 2 can be reduced.

[0046] For the above-mentioned sleeve 1, please refer to Figures 1 to 3 , the sleeve 1 is further provided with a second cavity 12, a first through port 13 and a second through port 14. The second cavity 12 is isolated from the first cavity 11. The second cavity 12 is arranged around the first cavity 11. The first through port 13 and the second through port 14 are both communicated with the second cavity 12. The first through port 13 and the second through port 14 are arranged at intervals. The first through port 13, the second cavity 12 and the second through port 14 are sequentially communicated to form a fluid passage, and the fluid passage is used for fluid to flow through. By the above method, during the grinding process, for the heat generated by the grinding assembly 2 and the material to be ground during the grinding process, when the heat is transferred to the sleeve 1, the coolant circulates through the fluid passage, and the heat of the sleeve 1 can be quickly removed, so as to achieve the purpose of heat dissipation.

[0047] For the above-mentioned sleeve 1, please refer to Figures 1 to 3 , the sleeve 1 includes a cylinder body 15, a top cover 16 and a bottom cover 17. The top cover 16 is detachably connected to the top of the cylinder body 15, and the bottom cover 17 is detachably connected to the top of the cylinder body 15. By the above method, the cylinder body 15 can be conveniently opened or closed.

[0048] An embodiment of the present utility model provides a grinding device 100, which includes a sleeve 1, a grinding assembly 2, and a driving assembly (not shown in the figure); the sleeve 1 is provided with a first cavity 11 for accommodating the material to be ground; the grinding assembly 2 includes a rotating shaft 21, a runner 22, a connecting member 23, a rod pin 24, and a grinding ball (not shown in the figure). The rotating shaft 21 is rotatably arranged on the sleeve 1, and at least part of the rotating shaft 21 extends into the first cavity 11. The runner 22 is arranged on the part of the rotating shaft 21 extending into the first cavity 11. One end of the connecting member 23 is connected to the side of the runner 22, and the other end of the connecting member 23 is detachably connected to the rod pin 24. The grinding ball (not shown in the figure) is arranged in the first cavity 11 and is used to impact and decompose the material to be ground; the driving assembly (not shown in the figure) is arranged on the sleeve 1 and is drivingly connected to the rotating shaft 21. When the rod pin 24 rotates to drive the grinding ball (not shown in the figure) to impact and decompose the material to be ground, and the rod pin 24 gradually wears and needs to be replaced, through the above method, the rod pin 24 can be detachably connected to the connecting member 23, so that the rod pin 24 is convenient to disassemble and assemble, the disassembly and assembly efficiency of the rod pin 24 is improved, and the rapid replacement of the rod pin 24 is facilitated.

[0049] The present utility model further provides an embodiment of an assembly line. The assembly line includes the above-mentioned grinding device. For the specific structure and function of the above-mentioned grinding device, reference can be made to the above-mentioned embodiment, and details will not be described herein one by one.

[0050] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A grinding device, characterized in that: include: The sleeve is provided with a first cavity, wherein the first cavity is used to receive the material to be ground; A grinding assembly, comprising a rotating shaft, a rotating wheel, a connecting member, a rod pin and a grinding ball, wherein the rotating shaft is rotatably arranged on the sleeve, the rotating shaft at least partially extends into the first cavity, the rotating wheel is arranged at the portion of the rotating shaft extending into the first cavity, one end of the connecting member is connected to the side of the rotating wheel, and the other end of the connecting member is detachably connected to the rod pin, the grinding ball is arranged in the first cavity, and the grinding ball is used to impact and decompose the material to be ground; A driving assembly is arranged on the sleeve, and the driving assembly is drivingly connected to the rotating shaft.

2. The grinding device according to claim 1, characterized in that: A threaded connection portion is provided at one end of the connecting member away from the rotating wheel, and the rod pin is provided with a screw hole, and the threaded connection portion is screwed into the screw hole, so that the connecting member and the rod pin can be detachably connected.

3. The grinding device according to claim 2, characterized in that: The side of the rotating wheel is provided with an insertion hole, and the top or bottom of the rotating wheel is provided with a fastening hole, and the fastening hole is connected to the insertion hole; The end of the connecting member close to the rotating wheel is provided with a notch, the end of the connecting member close to the rotating wheel is plugged into the insertion hole, and the notch is aligned with the fastening hole; The grinding assembly further comprises a fastener connected to the fastening hole, and the fastener abuts against the inner wall of the recess so that the connecting member is fixed to the rotating wheel.

4. The grinding device according to claim 1, characterized in that: The rod pin is provided with an annular groove, and the groove is used as a criterion for judging the wear degree of the rod pin.

5. The grinding device according to claim 1, characterized in that: The number of the rotating wheels, connecting members and rod pins are all multiple, and the multiple rotating wheels are stacked on the part of the rotating shaft extending into the first cavity. One rotating wheel is connected to two connecting members, and the two connecting members are arranged opposite to the one rotating wheel. One connecting member is connected to one rod pin.

6. The grinding device according to claim 5, characterized in that: Along the direction in which the plurality of rotating wheels are stacked, the projections of the connecting members of any two adjacent rotating wheels deviate, and the projections of the connecting members of any two adjacent rotating wheels form a deviation angle.

7. The grinding device according to claim 1, characterized in that: The grinding assembly further comprises a separation wheel, which is arranged at the portion of the rotating shaft extending into the first cavity, and is located above the rotating wheel, and is used for rotating and separating the material to be ground and the grinding balls.

8. The grinding device according to claim 7, characterized in that: The separation wheel is at least partially made of CUR; and / or the rod pin is made of CUR.

9. The grinding device according to claim 1, characterized in that: The sleeve is also provided with a second cavity, a first port and a second port, the second cavity is isolated from the first cavity, the second cavity is arranged around the first cavity, the first port and the second port are both connected to the second cavity, the first port and the second port are arranged at intervals, the first port, the second cavity and the second port are connected in sequence to form a fluid passage, and the fluid passage is used for fluid flow.

10. A production line, characterized in that: Comprising a grinding device as described in any one of claims 1-9.

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