Grain grinding device

Abstract

This invention relates to the field of grain grinding technology, and in particular to a grain grinding device, comprising: a processing chamber having a lower grinding section and an upper grinding section; a grinding mechanism including a support frame mounted on the processing chamber and a fixed shaft seat mounted on the support frame, wherein a rotating seat is rotatably connected within the fixed shaft seat, and a lower grinding disc mounted on the rotating seat; a driving mechanism for driving the rotating seat to rotate; a transmission mechanism slidably disposed within the lower grinding disc; and an upper grinding disc disposed on the transmission mechanism. This invention controls the height of the upper grinding disc through a lifting mechanism, allowing adjustment of the material feeding space to avoid material accumulation caused by excessively rapid feeding. By using both the upper and lower grinding discs for grinding, layered and multi-stage grinding is achieved, improving grinding efficiency. The efficiency of grain passing through the grinding equipment is enhanced, reducing the heating time and thus preventing high-temperature spoilage.

Description

Technical Field

[0001] The invention relates to the technical field of grain grinding, in particular to a grain grinding device. Background Art

[0002] The grinding device generates heat due to friction when grinding. When grinding grains, the accumulation of materials at the feed and grinding places will affect the quality of the ground products. Grains have poor ability to withstand high temperatures. Therefore, it is important to control the feed speed during the grinding process. When grinding, the greater the difference in particle size before and after grinding, the longer the time required. Therefore, when grinding larger grains, the longer the time required and the more heat is applied, which affects the quality and taste of the product. For this reason, a grain grinding device is proposed. Summary of the invention

[0003] In view of the problem in the prior art that the grains may be heated due to factors such as grinding time and grinding efficiency, which may affect the product quality, the present invention is proposed.

[0004] Therefore, an object of the present invention is to provide a grain grinding device.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a grain grinding device, comprising: a processing chamber, wherein a lower grinding section and an upper grinding section are provided in the processing chamber; a grinding mechanism, which comprises a support frame arranged on the processing chamber, and a fixed shaft seat arranged on the support frame, a rotating seat is rotatably connected in the fixed shaft seat, and also comprises a lower grinding disc arranged on the rotating seat; a driving mechanism, which is used to drive the rotating seat to rotate; a transmission mechanism, which is slidably arranged in the lower grinding disc; an upper grinding disc, which is arranged on the transmission mechanism, and the synchronous rotation of the upper grinding disc and the lower grinding disc is realized through the transmission mechanism; a lifting mechanism, which is arranged on the rotating seat and is used to control the distance between the upper grinding disc and the lower grinding disc.

[0006] As a preferred solution of the grain grinding device of the present invention, a limiting sleeve is provided in the lower grinding disc; the transmission mechanism includes a limiting member slidably arranged in the limiting sleeve, and a cross ring frame arranged at the end of the limiting member, the outer wall of the cross ring frame is slidably connected to the limiting seat, and the limiting seat is connected to the upper grinding disc.

[0007] As a preferred solution of the grain grinding device of the present invention, a movable groove is provided in the limiting seat, and the inner wall size of the movable groove is larger than the outer wall size of the cross ring frame.

[0008] As a preferred solution of the grain grinding device of the present invention, wherein: a transition groove and a cross ring groove are provided in the limit seat; the inner wall size of the cross ring groove and the outer wall size of the cross ring frame match each other, and the transition groove connects the cross ring groove and the movable groove.

[0009] As a preferred embodiment of the grain grinding device of the present invention, the lifting mechanism includes a connecting frame arranged on the rotating seat, and an internal threaded sleeve arranged at the end of the connecting frame, the inner wall of the internal threaded sleeve is threadedly connected with a screw rod, and the end of the screw rod is provided with a push rod; the push rod is slidably arranged in the limit member; and the end of the screw rod is provided with a rotating block.

[0010] As a preferred solution of the grain grinding device of the present invention, the limiting member includes a sliding sleeve fixedly arranged on the cross ring frame, and an externally threaded sleeve arranged at the end of the sliding sleeve; a spring is arranged in the limiting seat; and it also includes a connecting screw sleeve rotatably arranged on the outer wall of the push rod, a turntable is arranged at one end of the connecting screw sleeve, and the inner wall of the connecting screw sleeve and the outer wall of the externally threaded sleeve are threadedly connected.

[0011] As a preferred embodiment of the grain grinding device of the present invention, the upper grinding disc is provided with an arc-shaped guide surface, and the bottom of the upper grinding disc is provided with a conical hole; the end of the push rod is provided with an arc-shaped head; the arc-shaped head is located in the conical hole; a threaded slot is provided in the upper grinding disc; and an adjusting bolt threadedly connected to the threaded slot is also included.

[0012] As a preferred solution of the grain grinding device of the present invention, wherein: the lower grinding disc is provided with a conical guide surface and a resistance surface; the limit seat is provided with a protective cover; and the lower grinding disc is provided with a discharge cover.

[0013] As a preferred solution of the grain grinding device of the present invention, the driving mechanism includes a gear ring arranged on the rotating seat, a gear meshed with the gear ring, and a driving shaft arranged on the gear.

[0014] As a preferred embodiment of the grain grinding device of the present invention, the processing chamber includes a lower cavity and an upper cavity, the lower grinding section is arranged on the lower cavity, the upper grinding section is arranged on the upper cavity, and also includes a feed port arranged on the upper grinding section.

[0015] The beneficial effects of the grain grinding device of the present invention are as follows: the height of the upper grinding disc is controlled by the lifting mechanism, so the size of the space for material discharge can be adjusted, and the speed of material discharge can be controlled to avoid material accumulation caused by too fast material discharge, and the upper grinding disc rotates together with the lower grinding disc when the lower grinding disc rotates, and the upper grinding disc and the lower grinding disc are used to perform grinding together to achieve layered and multiple-stage grinding. The upper grinding disc performs preliminary crushing of large grain particles, and the lower grinding disc and the lower grinding section perform fine grinding. The layered and multiple-stage grinding method can improve the grinding efficiency, and the efficiency of grain passing through the grinding equipment is improved, the heating time is reduced, and high-temperature deterioration is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is an overall schematic diagram of the grain grinding device.

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of a grain grinding device.

[0019] Figure 3 Schematic diagram of the internal structure of the grain grinding device.

[0020] Figure 4 This is a schematic diagram of the lifting mechanism structure of the grain grinding device.

[0021] Figure 5 It is a schematic diagram of the limit seat structure of the grain grinding device.

[0022] In the figure: 100, processing chamber; 101, lower grinding section; 102, lower cavity; 103, upper cavity; 104, upper grinding section; 105, feed port; 200, grinding mechanism; 201, support frame; 202, fixed shaft seat; 203, rotating seat; 204, lower grinding disc; 204a, limiting sleeve; 204b, conical guide surface; 204c, resistance surface; 204d, discharge cover; 300, driving mechanism; 301, gear ring; 302, gear; 303, driving shaft; 400, transmission mechanism; 401, limiting member; 401a, sliding shaft Sleeve; 401b, external thread sleeve; 402, cross ring frame; 403, limit seat; 403a, movable groove; 403b, transition groove; 403c, cross ring groove; 403d, protective cover; 404, spring; 500, upper grinding disc; 501, arc-shaped guide surface; 502, tapered hole; 503, threaded slot; 600, lifting mechanism; 601, connecting frame; 602, internal thread sleeve; 603, screw; 603a, rotating block; 604, ejector rod; 605, arc-shaped top head; 700, connecting screw sleeve; 701, turntable; 800, adjusting bolt. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Example 1, reference Figures 1 to 5 , which is the first embodiment of the present invention, provides a grain grinding device, including a processing chamber 100, in which a lower grinding section 101 and an upper grinding section 104 are provided; in this embodiment, the grain is located in the processing chamber 100 for grinding, and the upper grinding section 104 is arranged above the lower grinding section 101.

[0027] The grinding mechanism 200 includes a support frame 201 arranged on the processing chamber 100, and a fixed shaft seat 202 arranged on the support frame 201, a rotating seat 203 is rotatably connected inside the fixed shaft seat 202, and also includes a lower grinding disc 204 arranged on the rotating seat 203; in the present embodiment, the support frame 201 is fixedly connected to the outer wall of the processing chamber 100, and the support frame 201 is fixedly connected to the outer wall of the fixed shaft seat 202, the support frame 201 can install the device as a whole, the rotating seat 203 is rotatably connected to the fixed shaft seat 202 through a bearing, the rotation of the rotating seat 203 can make the lower grinding disc 204 rotate together, the lower grinding section 101 is arranged outside the lower grinding disc 204, and the two cooperate with each other to grind the grains.

[0028] The driving mechanism 300 is used to drive the rotating seat 203 to rotate. In this embodiment, the rotating seat 203 is controlled to rotate, thereby driving the lower grinding disc 204 to rotate, and the lower grinding disc 204 cooperates with the lower grinding section 101 to grind the grains.

[0029] The transmission mechanism 400 is slidably disposed in the lower grinding disc 204; the upper grinding disc 500 is disposed on the transmission mechanism 400, and the synchronous rotation of the upper grinding disc 500 and the lower grinding disc 204 is achieved through the transmission mechanism 400; the lifting mechanism 600 is disposed on the rotating seat 203, and is used to control the distance between the upper grinding disc 500 and the lower grinding disc 204.

[0030] When in use, the upper grinding disc 500 is lifted by the lifting mechanism 600 to control the height of the upper grinding disc 500, thereby adjusting the gap between the upper grinding disc 500 and the upper grinding section 104, so that the size of the space for material discharge can be adjusted, and the speed of material discharge can be controlled to avoid material accumulation caused by excessive material discharge. When the lower grinding disc 204 rotates, the upper grinding disc 500 can be driven by the transmission mechanism 400 to rotate together, and the upper grinding disc 500 and the lower grinding disc 204 are ground together to achieve layered and phased grinding, and the upper grinding disc 500 performs preliminary crushing of large grain particles, and the diameter after crushing is related to the gap size between the upper grinding disc 500 and the upper grinding section 104. After the grain falls, it is finely ground by the lower grinding disc 204 and the lower grinding section 101. The layered and multiple grinding method can improve the grinding efficiency. The efficiency of the grain passing through the grinding equipment is improved, and the heating time is reduced, thereby avoiding high-temperature deterioration. When the grain passes through the upper grinding disc 500 and then the lower grinding disc 204, there is a certain retention time in the middle to avoid continuous heating.

[0031] Specifically, a limiting sleeve 204a is provided in the lower grinding disc 204; the transmission mechanism 400 includes a limiting member 401 slidably provided in the limiting sleeve 204a, and a cross ring frame 402 provided at the end of the limiting member 401, the outer wall of the cross ring frame 402 is slidably connected to the limiting seat 403, and the limiting seat 403 is connected to the upper grinding disc 500. In this embodiment, the cross-section of the limiting sleeve 204a is elliptical, and the end of the limiting member 401 is fixedly connected to the end of the cross ring frame 402.

[0032] Furthermore, the driving mechanism 300 includes a gear ring 301 disposed on the rotating seat 203, and a gear 302 meshing with the gear ring 301, and also includes a driving shaft 303 disposed on the gear 302. In the present embodiment, the driving shaft 303 is used to be connected to the output shaft of a driving device, such as a driving motor. The gear ring 301 is fixedly disposed at the bottom end of the rotating seat 203. When the driving shaft 303 drives the gear 302 to rotate, the gear 302 can drive the gear ring 301 to rotate, thereby driving the rotating seat 203 to rotate, so that the lower grinding disc 204 is rotated and ground.

[0033] Among them, the processing chamber 100 includes a lower cavity 102 and an upper cavity 103, the lower grinding section 101 is arranged on the lower cavity 102, the upper grinding section 104 is arranged on the upper cavity 103, and also includes a feed port 105 arranged on the upper grinding section 104. In this embodiment, the grains are added into the processing chamber 100 through the feed port 105, and the grains first enter the upper grinding section 104 through the feed port 105, and then enter the lower cavity 102 and the upper cavity 103 after passing through the upper grinding section 104, and finally pass through the lower grinding section 101 and are discharged. Among them, the lower cavity 102 and the upper cavity 103 are connected and fixed by screws.

[0034] Example 2, reference Figures 1 to 5 , which is the second embodiment of the present invention. Different from the previous embodiment, a movable groove 403a is provided in the limiting seat 403, and the inner wall size of the movable groove 403a is larger than the outer wall size of the cross ring frame 402. In this embodiment, since the size of the movable groove 403a is larger than the outer wall size of the cross ring frame 402, the limiting seat 403 can swing and tilt outside the cross ring frame 402. When the cross ring frame 402 is located in the movable groove 403a, the upper grinding disc 500 can realize a swing operation during the rotation process, and will tilt according to the state of the grain particles and the surface pressure state. Therefore, when grinding, the upper grinding disc 500 can prevent the accumulation of materials by swinging, accelerate the process of feeding, and make the grains spread and evenly fed. The efficiency of the grains entering between the upper grinding disc 500 and the upper grinding section 104 is increased, and the grinding of the upper grinding disc 500 will also change the grinding angle and pressure state with the change of the grain particle size, so as to improve the grinding efficiency and the pressure area of ​​the extrusion process, and improve the grinding effect.

[0035] Specifically, a transition groove 403b and a cross ring groove 403c are provided in the limit seat 403; the inner wall size of the cross ring groove 403c matches the outer wall size of the cross ring frame 402, and the transition groove 403b connects the cross ring groove 403c and the movable groove 403a. In the present embodiment, when the cross ring frame 402 moves into the cross ring groove 403c, since the sizes of the cross ring frame 402 and the cross ring groove 403c match each other, the limit seat 403 will not be able to shake or tilt, and the setting of the transition groove 403b facilitates the cross ring frame 402 to slide from the movable groove 403a into the cross ring groove 403c.

[0036] Furthermore, the lifting mechanism 600 includes a connecting frame 601 arranged on the rotating seat 203, and an internal threaded sleeve 602 arranged at the end of the connecting frame 601, the inner wall of the internal threaded sleeve 602 is threadedly connected with a screw 603, and the end of the screw 603 is provided with a push rod 604; in the present embodiment, the connecting frame 601 is fixedly arranged at the bottom end of the rotating seat 203, and the push rod 604 can be lifted and lowered by rotating the screw 603, thereby controlling the height of the upper grinding disc 500; the push rod 604 is slidably arranged in the limit member 401; a rotating block 603a is provided at the end of the screw 603, and in the present embodiment, the setting of the rotating block 603a facilitates the rotation of the screw 603.

[0037] The limiting member 401 includes a sliding sleeve 401a fixed on the cross ring frame 402, and an external threaded sleeve 401b arranged at the end of the sliding sleeve 401a; in the present embodiment, the cross-section of the sliding sleeve 401a is elliptical, and the outer wall of the sliding sleeve 401a and the inner wall of the limiting sleeve 204a are slidably connected; a spring 404 is arranged in the limiting seat 403; in the present embodiment, the spring 404 is sleeved on the outer wall of the sliding sleeve 401a, and the two ends of the spring 404 are respectively attached to the cross ring frame 402 and the limiting seat 403.

[0038] Preferably, it also includes a connecting screw sleeve 700 rotatably arranged on the outer wall of the top rod 604, and a turntable 701 is provided at one end of the connecting screw sleeve 700. The inner wall of the connecting screw sleeve 700 and the outer wall of the external threaded sleeve 401b are threadedly connected. In this embodiment, by rotating the turntable 701, the connecting screw sleeve 700 can be rotated, and then the external threaded sleeve 401b drives the sliding sleeve 401a to slide in the limiting sleeve 204a, thereby realizing the lifting and lowering of the cross ring frame 402.

[0039] The rest of the structure is the same as that of Example 1.

[0040] When in use, grains are added through the feed port 105, and the drive shaft 303 rotates to drive the gear ring 301 to rotate. Since the limiting sleeve 204a and the sliding sleeve 401a are both elliptical in design, when the lower grinding disc 204 rotates, it will drive the upper grinding disc 500 to rotate together.

[0041] Rotate the connecting screw sleeve 700 to make the cross ring frame 402 slide into the cross ring groove 403c, and the spring 404 is compressed. At this time, since one end of the push rod 604 is against the upper grinding disc 500, and the cross ring frame 402 is against the limit seat 403, the upper grinding disc 500 in this state will be in a stable state and cannot tilt outside the cross ring frame 402. At this time, the lifting and lowering of the push rod 604 can be controlled by rotating the rotating block 603a, and then the lifting and lowering of the upper grinding disc 500 can be controlled, and the space for discharging materials can be controlled.

[0042] The connecting nut 700 is rotated to make the cross ring frame 402 slide into the movable groove 403a. Due to the elastic force of the spring 404 and the gravity of the upper grinding disc 500, the push rod 604 can support the upper grinding disc 500. Since the size of the movable groove 403a is larger than the size of the cross ring frame 402, the upper grinding disc 500 can be tilted and skewed. In this state, the upper grinding disc 500 is in a movable state. When grinding grains, it can assist the upper grains to fall by tilting and swinging. The grinding position and grinding area will change continuously with the rotation and tilting, thereby improving the grinding effect. It should be noted that the depth of the movable groove 403a is greater than the thickness of the cross ring frame 402. The maximum swing amplitude of the upper grinding disc 500 can be controlled by controlling the position of the cross ring frame 402 in the movable groove 403a. In conjunction with the lifting and lowering of the push rod 604, the gap between the upper grinding disc 500 and the upper grinding section 104 can be adjusted to be suitable for initial grinding of grains of different sizes.

[0043] Example 3, reference Figures 1 to 5 , which is the third embodiment of the present invention. Different from the previous embodiment, an arc-shaped guide surface 501 is provided on the upper grinding disc 500, and a conical hole 502 is provided at the bottom of the upper grinding disc 500; in this embodiment, the setting of the arc-shaped guide surface 501 facilitates the grains to slide along the surface of the upper grinding disc 500, and the conical hole 502 is provided at the bottom center of the upper grinding disc 500.

[0044] Preferably, an arc-shaped top head 605 is provided at the end of the top rod 604 ; in this embodiment, the arc-shaped top head 605 is located in the tapered hole 502 .

[0045] Preferably, a threaded slot 503 is provided in the upper grinding disc 500; it also includes an adjustment bolt 800 threadedly connected to the threaded slot 503. In this embodiment, by rotating the adjustment bolt 800, the gap between the upper grinding disc 500 and the upper grinding section 104 can be fine-tuned, which makes adjustment more convenient.

[0046] Specifically, a conical guide surface 204 b and a contact surface 204 c are provided on the lower grinding disc 204 . In the present embodiment, the conical guide surface 204 b is provided to facilitate the grains to slide into between the lower grinding disc 204 and the lower grinding section 101 .

[0047] Furthermore, a protective cover 403d is provided on the limiting seat 403; a discharge cover 204d is provided on the lower grinding disc 204. In this embodiment, the setting of the protective cover 403d can prevent grains from entering the limiting seat 403, and the setting of the discharge cover 204d is convenient for guiding the discharge of ground grain powder particles.

[0048] The rest of the structure is the same as that of Example 2.

[0049] When in use, the screw 603 can be rotated to make the protective cover 403d fit on the conical guide surface 204b, and the connecting screw sleeve 700 can be rotated to make the cross ring frame 402 press and lock the limit seat 403. At this time, the protective cover 403d and the conical guide surface 204b fit together, and the upper grinding disc 500 is in a stable state. The upper grinding disc 500 is located in the upper cavity 103 and the lower cavity 102, and can be used for stirring materials. The protective cover 403d and the conical guide surface 204b fit together to prevent the grain raw materials from entering the limit seat 403.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A grain grinding device, characterized in that: include, A processing chamber (100), wherein a lower grinding section (101) and an upper grinding section (104) are provided in the processing chamber (100); A grinding mechanism (200), comprising a support frame (201) disposed on the processing chamber (100), and a fixed shaft seat (202) disposed on the support frame (201), a rotating seat (203) being rotatably connected inside the fixed shaft seat (202), and further comprising a lower grinding disc (204) disposed on the rotating seat (203); A driving mechanism (300) for driving the rotating seat (203) to rotate; A transmission mechanism (400) slidably disposed in the lower grinding disc (204); An upper grinding disc (500) is arranged on the transmission mechanism (400), and the transmission mechanism (400) is used to achieve synchronous rotation of the upper grinding disc (500) and the lower grinding disc (204); A lifting mechanism (600) is disposed on the rotating seat (203) and is used to control the distance between the upper grinding disc (500) and the lower grinding disc (204); A limiting shaft sleeve (204a) is provided in the lower grinding disc (204); The transmission mechanism (400) comprises a limiting member (401) slidably disposed in the limiting shaft sleeve (204a), and a cross ring frame (402) disposed at the end of the limiting member (401), the outer wall of the cross ring frame (402) being slidably connected to a limiting seat (403), and the limiting seat (403) is connected to the upper grinding disc (500); A movable groove (403a) is provided in the limiting seat (403), and the inner wall size of the movable groove (403a) is larger than the outer wall size of the cross ring frame (402); The limiting seat (403) is provided with a transition groove (403b) and a cross ring groove (403c); The inner wall size of the cross ring groove (403c) and the outer wall size of the cross ring frame (402) match each other, and the transition groove (403b) connects the cross ring groove (403c) and the movable groove (403a); The lifting mechanism (600) comprises a connecting frame (601) arranged on the rotating seat (203), and an internal thread sleeve (602) arranged at the end of the connecting frame (601), the inner wall of the internal thread sleeve (602) is threadedly connected with a screw rod (603), and the end of the screw rod (603) is provided with a lifting rod (604); The push rod (604) is slidably disposed in the limiting member (401); A rotating block (603a) is provided at the end of the screw rod (603).

2. The grain grinding device according to claim 1, characterized in that: The limiting member (401) comprises a sliding sleeve (401a) fixedly arranged on the cross ring frame (402), and an external threaded sleeve (401b) arranged at the end of the sliding sleeve (401a); A spring (404) is provided in the limiting seat (403); It also includes a connecting screw sleeve (700) rotatably arranged on the outer wall of the push rod (604), a rotating disk (701) being arranged at one end of the connecting screw sleeve (700), and an inner wall of the connecting screw sleeve (700) being threadedly connected to an outer wall of the external thread sleeve (401b).

3. The grain grinding device according to claim 2, characterized in that: The upper grinding disc (500) is provided with an arc-shaped guide surface (501), and the bottom of the upper grinding disc (500) is provided with a conical hole (502); An arc-shaped top head (605) is provided at the end of the push rod (604); The arc-shaped top head (605) is located in the tapered hole (502); The upper grinding disc (500) is provided with a threaded slot (503); It also includes an adjusting bolt (800) threadedly connected to the threaded slot (503).

4. The grain grinding device according to claim 3, characterized in that: The lower grinding disc (204) is provided with a conical guiding surface (204b) and a contact surface (204c); The limiting seat (403) is provided with a protective cover (403d); The lower grinding disc (204) is provided with a discharge cover (204d).

5. The grain grinding device according to any one of claims 1 to 4, characterized in that: The driving mechanism (300) comprises a gear ring (301) arranged on the rotating seat (203), a gear (302) meshed with the gear ring (301), and a driving shaft (303) arranged on the gear (302).

6. The grain grinding device according to claim 5, characterized in that: The processing chamber (100) comprises a lower cavity (102) and an upper cavity (103), the lower grinding section (101) is arranged on the lower cavity (102), the upper grinding section (104) is arranged on the upper cavity (103), and also comprises a feed port (105) arranged on the upper grinding section (104).

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