Stone-mill soybean milk grinder

Abstract

A stone mill soybean milk grinder comprises a machine body base, an upper cover plate assembly, a hopper, a grinding mechanism, a left connecting shell, a right connecting shell and a residue-liquid separating mechanism. The grinding mechanism, the slag-liquid separation mechanism and the machine body base are assembled, are arranged left and right, and are driven by two motors to independently operate; the hopper is of a barrel-shaped structure with the middle portion shrunk in the radial direction, the upper end of the hopper is a feeding port, and the lower end of the hopper is a discharging port in butt joint with the grinding mechanism. The upper cover plate assembly is assembled with the machine body base in a hinged mode and buckled on a feeding port of the hopper; and the grinding mechanism communicates with the slag-liquid separation mechanism through the left and right connecting shells, and slurry generated after grinding is collected and guided into the slag-liquid separation mechanism. The stone mill soybean milk machine solves the problems in the prior art that the distance between the upper millstone and the lower millstone is controlled and the grinding and deslagging process is controlled, and achieves the purposes of being convenient to operate, improving the soybean milk quality and reducing the processing cost.

Description

Technical Field

[0001] This utility model relates to the field of food processing technology, specifically an integrated stone mill soybean milk grinder that uses two motors to drive the grinding disc and the residue-liquid separation screen respectively. Background Technology

[0002] Stone-ground soy milk has a delicate texture and rich soy aroma. Because of its smaller particle size, it is easier for the body to absorb. At the same time, stone-ground soy milk retains the plant protein, phospholipids, vitamins B1 and B2, and minerals such as iron and calcium in soybeans, making it relatively high in nutritional value. With people's pursuit of a healthy lifestyle, stone-ground soy milk is more popular than machine-made soy milk.

[0003] Stone-ground soy milk is processed using a grinding method, where soybeans are finely ground using a slowly rotating millstone while water is added to create a slurry containing a mixture of soy and pulp. The pulp is then separated from the slurry. Traditionally, stone-ground soy milk is ground manually by rotating the millstone, requiring the continuous addition of soybeans and water. Separating the pulp also necessitates filtration using a cloth filter. Due to its low level of automation and cumbersome operation, this method suffers from high labor intensity and low efficiency. To solve this problem, different types of electric stone mill soy milk makers have been developed. However, most existing electric stone mill soy milk makers use a single motor to drive the grinding disc and filter screen. In order to balance the benefits of slow grinding by the grinding disc and fast operation by the filter screen, the grinding and slag removal processes cannot be carried out continuously. In addition, existing electric stone mill soy milk makers generally control the distance between the upper and lower grinding discs by using axial positioning or edge limiting. Axial positioning has the problem of poor stability, which will shorten its service life due to the contact friction between the upper and lower grinding discs and also affect the fineness of the ground particles and the uniformity of the soy milk. Edge limiting leads to high rotational resistance of the grinding disc, increasing energy consumption and the processing cost of soy milk. Utility Model Content

[0004] This utility model provides a stone mill soybean milk grinder, which aims to solve the problems existing in the control of the distance between the upper and lower grinding discs and the control of the grinding and slag removal process in the current electric stone mill soybean milk grinder by innovatively designing the upper and lower grinding discs and their assembly structure, as well as the driving mode of the grinding discs and filter screen. The goal is to achieve convenient operation, improve the quality of soybean milk, and reduce processing costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stone mill soybean milk grinder includes a base, a top cover assembly, a hopper, a grinding mechanism, left and right connecting shells, and a residue-liquid separation mechanism. The base includes a water tank, a grinding mechanism mounting base, a residue-liquid separation mechanism mounting base, and a base. The grinding mechanism and the residue-liquid separation mechanism are respectively assembled to the base via the grinding mechanism mounting base and the residue-liquid separation mechanism mounting base, arranged left and right. The grinding mechanism and the residue-liquid separation mechanism are driven by two motors and operate independently. The hopper is a cylindrical structure that tapers radially in the middle, with a feed inlet at the top and a discharge outlet that connects to the grinding mechanism at the bottom. The top cover assembly is hinged to the base and fastens to the feed inlet of the hopper. The left and right connecting shells connect the grinding mechanism and the residue-liquid separation mechanism, collecting the slurry produced after grinding and guiding it into the residue-liquid separation mechanism.

[0007] The aforementioned stone mill soybean milk grinder includes a grinding mechanism comprising a grinding disc support, an upper grinding disc, a lower grinding disc, and a grinding drive motor. The grinding disc support is a split frame structure, comprising an upper support, a lower support, and fastening connectors. The bottom of the lower support is fixedly assembled with the grinding mechanism mounting base of the machine body. The upper end face of the lower support forms a mating surface with the bottom face of the upper support. The upper and lower supports are connected by fastening connectors, and circumferential positioning is achieved by a set of positioning pins on the bottom face of the upper support engaging with positioning holes on the upper end face of the lower support. The upper grinding disc is fixedly assembled on the upper support. The upper and lower grinding discs are arranged opposite each other, with a gap of 0.05–0.6 mm between them. The lower grinding disc is fastened to the output shaft of the grinding drive motor. The grinding drive motor is fitted with the lower support.

[0008] In the aforementioned stone mill soybean milk grinder, the grinding mechanism has an upper grinding disc with a concave curved surface and a lower grinding disc with a convex curved surface. Coarse grinding areas and fine grinding areas are distributed on the grinding surfaces of the upper and lower grinding discs. The coarse grinding area is located near the center, while the fine grinding area is a peripheral annular area. Reverse intersecting grinding patterns are set in the coarse grinding area and fine grinding area of ​​the upper and lower grinding discs, respectively.

[0009] The aforementioned stone mill soybean milk grinder further includes a bean-picking assembly, which consists of bean-picking blades and a bean-picking drive unit. The bean-picking drive unit includes a drive shaft seat, a fork, and an eccentric gear ring. The drive shaft seat is fixedly assembled with the output shaft of the grinding drive motor. The fork is mounted on the drive shaft seat. The eccentric gear ring is rotatably mounted on the upper support of the grinding disc support. The inner wall of the eccentric gear ring has grooves that mate with the fork. The bean-picking blades are mounted on the eccentric gear ring and include an outer ring bean-picking blade and an inner ring bean-picking blade, which are arranged opposite to each other.

[0010] The aforementioned stone mill soybean milk grinder has a grinding disc receiving cavity, a slurry channel, and a filter assembly receiving cavity on the left and right connecting shells. The upper end of the grinding disc receiving cavity is an open structure, which connects to the discharge port of the hopper. A grinding motor assembly through hole is provided on the bottom surface of the grinding disc receiving cavity, and its side is connected to the filter assembly receiving cavity through the slurry channel. The filter assembly receiving cavity has an open structure at the lower end.

[0011] The aforementioned stone mill soybean milk grinder is further provided with a soybean milk outlet on the left and right connecting shells, and the soybean milk outlet is located at the bottom of the side wall of the filter assembly receiving cavity.

[0012] The aforementioned stone mill soybean milk grinder includes a residue-liquid separation mechanism comprising a filter screen, a filter screen drive motor assembly, and a residue collection box. The residue collection box is an annular structure barrel fitted outside the residue-liquid separation mechanism mounting base of the machine body, with its upper opening connecting to the lower open structure of the filter assembly receiving cavity of the left and right connecting shells. The filter screen drive motor assembly is installed in the residue-liquid separation mechanism mounting base, and its output shaft is fixedly connected to the filter screen. The filter screen is a conical inverted mesh cover structure placed in the filter assembly receiving cavity of the left and right connecting shells, with its upper inlet connected to the slurry channel of the left and right connecting shells and its lower outlet opposite to the residue collection box.

[0013] In the aforementioned stone mill soybean milk grinder, the upper inner side of the filter screen is provided with a guide plate, and the bottom outer side is provided with a baffle ring between the filter assembly receiving cavity of the left and right connecting shells to prevent soybean milk backflow.

[0014] In the aforementioned stone mill soybean milk grinder, the feed inlet and discharge outlet of the hopper are eccentric structures, and the offset of its central axis is the same as the offset of the central axis of the eccentric toothed ring of the bean-picking component in the grinding mechanism. An upper cover plate assembly is provided above the feed inlet, and the upper cover plate assembly is hinged to the machine body base.

[0015] The aforementioned stone mill soy milk grinder also includes a water supply pipeline control system, which comprises a water pump, a three-way solenoid valve, a water supply pipeline, a nozzle, and a control module. The water pump is placed on the base of the machine body, located in the cavity below the grinding mechanism mounting seat. The water pump inlet is connected to the water tank of the machine body via the water supply pipeline. A nozzle extending to the feed inlet of the hopper is provided on one side of the water pump outlet. A three-way solenoid valve is installed in the water supply pipeline on one side of the water pump inlet. The three-way solenoid valve has three interfaces: A, B, and C. The control module controls the opening and closing of different interfaces. When the stone mill soy milk grinder is working, the control module instructs the A and C interfaces of the three-way solenoid valve to connect, supplying water to the grinding mechanism through the water pump. Before the stone mill soy milk grinder stops working, the control module instructs the B and C interfaces of the three-way solenoid valve to connect, draining the water remaining in the water supply pipeline to the outside of the machine body.

[0016] This utility model provides a stone mill soybean milk grinder, which uses dual motors to drive the grinding mechanism and the residue-liquid separation mechanism respectively. The operating speeds of the two motors can be controlled independently, allowing the grinding disc to grind slowly while the filter screen rotates quickly, achieving continuous operation of the grinding and filtering processes. The upper grinding disc is fixedly assembled with the upper support of a split-type grinding disc bracket, and the lower grinding disc is assembled with the output shaft of the grinding drive motor. Through the matching of the lower support of the grinding disc bracket with the grinding drive motor, the distance between the upper and lower grinding discs can be stably controlled within the range of 0.05–0.6 mm. Furthermore, the grinding surfaces of the upper and lower grinding discs are designed as concave and convex curved surfaces respectively, and the grinding process… The design features a transitional structure from the coarse grinding area to the fine grinding area, ensuring the stability of the soybean grinding process. This invention utilizes an eccentrically structured bean-feeding assembly, where each rotation of the lower grinding disc causes the bean-feeding blades to rotate at a certain angle. The outer and inner ring bean-feeding blades work together to evenly feed the soybeans between the upper and lower grinding discs, further ensuring the stability of the grinding process. To ensure a dry and clean environment when the stone mill soy milk maker is not in operation, and to prevent mold growth in the water supply pipes that could adversely affect human health, residual drinking water in the water supply pipes can be drained through the water supply pipe control system before the soy milk maker stops working. In summary, this invention solves the problems existing in current electric stone mill soy milk makers regarding the control of the distance between the upper and lower grinding discs and the control of the grinding and residue removal processes, achieving the goals of convenient operation, improved soy milk quality, and reduced processing costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the stone mill soybean milk grinder described in this utility model;

[0018] Figure 2 yes Figure 1 Exploded structure diagram;

[0019] Figure 3 This is a schematic cross-sectional view of the stone mill soybean milk grinder described in this utility model;

[0020] Figure 4 This is a schematic diagram of the grinding mechanism;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the grinding mechanism;

[0022] Figure 6 This is a schematic diagram of the upper and lower supports of the grinding disc support in the grinding mechanism;

[0023] Figure 7 This is a schematic diagram of the bean-picking component in the grinding mechanism;

[0024] Figure 8 This is a schematic diagram illustrating the working principle of the bean-peeling component;

[0025] Figure 9 This is a schematic diagram of the upper grinding disc structure;

[0026] Figure 10 This is a schematic diagram of the lower grinding disc structure;

[0027] Figure 11 This is a schematic diagram of the left and right connected shell structure;

[0028] Figure 12 This is a schematic diagram of the sludge-liquid separation mechanism;

[0029] Figure 13 This is a cross-sectional structural diagram of the left and right connecting shells and the sludge-liquid separation mechanism;

[0030] Figure 14 This is a schematic diagram illustrating the working principle of the water supply pipeline control system of a stone mill soybean milk grinder during operation.

[0031] Figure 15 This is a schematic diagram illustrating the working principle of draining the water supply pipeline before the stone mill soybean milk grinder stops.

[0032] Explanation of each label in the diagram:

[0033] 1 is the machine body base, 1-1 is the water tank, 1-2 is the grinding mechanism mounting base, 1-3 is the sludge-liquid separation mechanism mounting base, and 1-4 is the base.

[0034] 2 is the top cover assembly;

[0035] 3 is the hopper;

[0036] 4 is the grinding mechanism; 4-1 is the grinding disc support; 4-1-1 is the upper support; 4-1-2 is the lower support; 4-1-3 is the fastening connector; 4-1-4 is the positioning post; 4-1-5 is the positioning hole; 4-2 is the upper grinding disc; 4-2-1 is the coarse grinding area of ​​the upper grinding disc; 4-2-2 is the fine grinding area of ​​the upper grinding disc; 4-2-3 is the feed hole; 4-3 is the lower grinding disc; 4-3-1 is the coarse grinding area of ​​the lower grinding disc; 4-3-2 is the fine grinding area of ​​the lower grinding disc; 4-4 is the grinding drive motor; 4-5 is the bean-picking assembly; 4-5-1 is the outer ring bean-picking blade; 4-5-2 is the drive shaft seat; 4-5-3 is the fork; 4-5-4 is the eccentric gear ring; 4-5-5 is the inner ring bean-picking blade; 4-6 is the bearing.

[0037] 5 is the left and right connecting shell, 5-1 is the grinding disc receiving cavity, 5-2 is the filter component receiving cavity, 5-3 is the soy milk outlet, and 5-4 is the soy milk channel;

[0038] 6 is the slag-liquid separation mechanism, 6-1 is the filter screen, 6-2 is the slag receiving box, 6-3 is the filter screen drive motor assembly, 6-4 is the retaining ring, and 6-5 is the guide plate;

[0039] 7 is a three-way solenoid valve;

[0040] 8 represents a water pump;

[0041] 9 represents the control module;

[0042] 10 is the battery module;

[0043] 11 represents the water supply pipeline;

[0044] 12 represents the nozzle. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] See Figure 1. Figure 2 , Figure 3 This utility model provides a stone mill soybean milk grinder, which includes a machine body base 1, an upper cover plate assembly 2, a hopper 3, a grinding mechanism 4, left and right connecting shells 5, and a residue-liquid separation mechanism 6; the machine body base 1 is provided with a water tank 1-1, a grinding mechanism mounting base 1-2, a residue-liquid separation mechanism mounting base 1-3, and a base 1-4; the grinding mechanism 4 and the residue-liquid separation mechanism 6 are respectively assembled to the machine body base 1 through the grinding mechanism mounting base 1-2 and the residue-liquid separation mechanism mounting base 1-3, and the two are arranged in a left-right manner; the grinding mechanism 4 and the residue-liquid separation mechanism 6 are driven by two motors to operate independently. The hopper 3 is a cylindrical structure that tapers radially in the middle. Its upper end is the feed inlet, and its lower end is the discharge outlet that connects with the grinding mechanism 4. The bean raw materials are fed into the feed inlet of the hopper 3. The upper cover plate assembly 2 is installed at the feed inlet of the hopper 3. The upper cover plate assembly 2 is hinged to the machine body base 1 and fastened to the feed inlet of the hopper 3. When the raw materials are fed, the upper cover plate assembly 2 is opened, and after the raw materials are fed, the upper cover plate assembly 2 is closed. The left and right connecting shells 5 connect the grinding mechanism 4 and the slurry separation mechanism 6, collect the slurry produced after grinding and introduce it into the slurry separation mechanism 6.

[0047] See Figure 4 , Figure 5 , Figure 6The stone mill soybean milk grinder of this utility model has a grinding mechanism 4 comprising a grinding disc support 4-1, an upper grinding disc 4-2, a lower grinding disc 4-3, and a grinding drive motor 4-4. The grinding disc support 4-1 is a split frame structure, including an upper support 4-1-1, a lower support 4-1-2, and a fastening connector 4-1-3. The bottom of the lower support 4-1-2 is fixedly assembled with the grinding mechanism mounting seat 1-2 of the machine body base 1. The upper end face of the lower support 4-1-2 forms a mating surface with the bottom face of the upper support 4-1-1. The upper support 4-1-1 and the lower support 4-1-2 are connected by the fastening connector 4-1-3. Circumferential positioning is achieved by a set of positioning pins 4-1-4 on the bottom face of the upper support 4-1-1 cooperating with positioning holes 4-1-5 on the upper end face of the lower support 4-1-2. The upper grinding disc 4-2 is fixedly assembled on the upper support 4-1-1. The upper grinding disc 4-2 and the lower grinding disc 4-1-3 are connected by a fastening connector 4-1-3. 3. The upper grinding disc 4-2 and the lower grinding disc 4-3 are arranged opposite each other, with a gap of 0.05 to 0.6 mm reserved between them to ensure the fineness of grinding the soybeans. During the assembly and maintenance of the stone mill soybean milk grinder, the gap between the upper grinding disc 4-2 and the lower grinding disc 4-3 can be ensured by designing the structural dimensions of each related component. Alternatively, the gap between the upper grinding disc 4-2 and the lower grinding disc 4-3 can be adjusted by adding a shim between the upper end face of the lower support 4-1-2 and the bottom face of the upper support 4-1-1. As a preferred embodiment, the outer diameter of the upper grinding disc 4-2 and the lower grinding disc 4-3 is 80 to 280 mm. The lower grinding disc 4-3 is fastened to the output shaft of the grinding drive motor 4-4. The grinding drive motor 4-4 is fitted to the lower support 4-1-2, and a bearing 4-6 is installed at the mating part between the output shaft of the grinding drive motor 4-4 and the lower support 4-1-2 to reduce the resistance on the output bearing of the grinding drive motor 4-4.

[0048] See Figure 4 , Figure 5 , Figure 7 , Figure 8The stone mill soybean milk grinder of this utility model further includes a bean-picking assembly 4-5 in its grinding mechanism 4. The bean-picking assembly 4-5 consists of bean-picking blades and a bean-picking drive unit. The bean-picking drive unit includes a drive shaft seat 4-5-2, a fork 4-5-3, and an eccentric gear ring 4-5-4. The drive shaft seat 4-5-2 is fixedly assembled with the output shaft of the grinding drive motor 4-4. The fork 4-5-3 is mounted on the drive shaft seat 4-5-2. The eccentric gear ring 4-5-4 is rotatably mounted on the upper support 4-1-1 of the grinding disc support 4-1. The inner wall of the eccentric gear ring 4-5-4 has grooves that mate with the fork 4-5-3. The bean-picking blades are mounted on the eccentric gear ring 4-5-4, including… The outer ring bean-peeling blades 4-5-1 and the inner ring bean-peeling blades 4-5-5 are arranged opposite to each other. The working principle of the bean-peeling assembly 4-5 is as follows: the fork 4-5-3 rotates synchronously with the lower grinding disc 4-3 under the drive of the grinding drive motor 4-4. Every time the lower grinding disc 4-3 rotates once, the fork 4-5-3 moves the eccentric toothed ring 4-5-4, causing the outer ring bean-peeling blades 4-5-1 and the inner ring bean-peeling blades 4-5-5 to rotate at a certain angle. The outer ring bean-peeling blades 4-5-1 and the inner ring bean-peeling blades 4-5-5 cooperate to feed a certain amount of beans through the feed hole 4-2-3 in the center of the upper grinding disc 4-2 into the space between the upper grinding disc 4-2 and the lower grinding disc 4-3 for grinding.

[0049] See Figure 4 , Figure 5 , Figure 9 , Figure 10 The stone mill soybean milk grinder of this utility model, in its grinding mechanism 4, preferably has an upper grinding disc 4-2 and a lower grinding disc 4-3 made of granite. The grinding working surface of the upper grinding disc 4-2 has an inwardly concave curved surface structure, and the grinding working surface of the lower grinding disc 4-3 has an outwardly convex curved surface structure. A coarse grinding area 4-2-1 and a fine grinding area 4-2-2 are distributed on the grinding working surface of the upper grinding disc 4-2. The coarse grinding area 4-2-1 is located at the center of the upper grinding disc 4-2. The fine grinding area 4-2-2 is the annular area around the upper grinding disc 4-2; the coarse grinding area 4-3-1 and the fine grinding area 4-3-2 are distributed on the grinding working surface of the lower grinding disc 4-3. The coarse grinding area 4-3-1 is located at the center of the lower grinding disc 4-3, and the fine grinding area 4-3-2 is the annular area around the lower grinding disc 4-3. In this invention, the coarse grinding area and the fine grinding area of ​​the upper grinding disc and the lower grinding disc are respectively provided with reverse intersecting grinding patterns.

[0050] See Figure 1 , Figure 2 , Figure 3 , Figure 11 , Figure 13The stone mill soybean milk grinder of this utility model has a grinding disc receiving cavity 5-1, a slurry channel 5-4, and a filter assembly receiving cavity 5-2 on its left and right connecting shells 5. The upper end of the grinding disc receiving cavity 5-1 is an open structure, which connects to the discharge port of the hopper 3 through the open structure. The bottom surface of the grinding disc receiving cavity 5-1 is provided with a grinding motor assembly through hole, and its side is connected to the filter assembly receiving cavity 5-2 through the slurry channel 5-4. The filter assembly receiving cavity 5-2 is an open structure at the lower end. This utility model also provides a soybean milk outlet 5-3 on the left and right connecting shells 5, which is located at the bottom of the side wall of the filter assembly receiving cavity 5-2.

[0051] See Figure 1 , Figure 2 , Figure 3 , Figure 11 , Figure 12 , Figure 13 The stone mill soybean milk grinder of this utility model has a residue-liquid separation mechanism 6 equipped with a filter screen 6-1, a filter screen drive motor assembly 6-3, and a residue collection box 6-2. The residue collection box 6-2 is a barrel with an annular structure, which is fitted outside the residue-liquid separation mechanism mounting base 1-3 of the machine body base 1. The upper opening is connected to the lower open structure of the filter assembly receiving cavity 5-2 of the left and right connecting shells 5. The filter screen drive motor assembly 6-3 is installed in the residue-liquid separation mechanism mounting base 1-3, and its output shaft is fixedly connected to the filter screen 6-1. A bearing assembly is provided at the mating part of its output shaft and the residue-liquid separation mechanism mounting base 1-3. The filter screen 6-1 is a conical mesh structure with an upper inlet diameter smaller than a lower outlet diameter, preferably with a mesh diameter ranging from 0.2 to 0.6 mm. The filter screen 6-1 is placed in the filter assembly receiving cavity 5-2 of the left and right connecting shell 5. Its upper inlet is connected to the slurry channel 5-4 of the left and right connecting shell 5, and its lower outlet is opposite to the slag receiving box 6-2. A guide plate 6-5 is provided on the upper inner side of the filter screen 6-1. The ground slurry is guided into the space area near the side wall of the filter screen 6-1 through the guide plate. A baffle ring 6-4 is provided between the bottom outer side of the filter screen 6-1 and the filter assembly receiving cavity 5-2 of the left and right connecting shell 5 to prevent the backflow of soybean milk.

[0052] See Figure 3 , Figure 14 , Figure 15The stone mill soybean milk grinder of this utility model is also equipped with a water supply pipeline control system. The water supply pipeline control system includes a water pump 8, a three-way solenoid valve 7, a water supply pipeline 11, a nozzle 12, and a control module 9. The water pump 8 is placed on the base 1-4 of the machine body 1 and is located in the cavity below the grinding mechanism mounting base 1-2. The water inlet of the water pump 8 is connected to the water tank 1-1 of the machine body 1 through the water supply pipeline 11. A nozzle 12 extending to the feed inlet of the hopper is provided on one side of the water pump outlet. A three-way solenoid valve 7 is installed in the water supply pipeline on one side of the water pump inlet. The three-way solenoid valve 7 has three interfaces, A, B, and C, and the opening and closing of different interfaces can be controlled by the control module 9.

[0053] See Figures 1 to 15 When using this invention to grind soybeans, first open the upper cover assembly 2 and inject the soybeans into the hopper 3. Start the grinding drive motor 4-4 via the battery module 10. The bean-feeding assembly 4-5 feeds a certain amount of soybeans into the gap between the upper grinding disc 4-2 and the lower grinding disc 4-3. Under the command of the control module 9 in the water supply pipeline control system, the A and C ports of the three-way solenoid valve 7 are connected, and an appropriate amount of drinking water (as shown in the attached diagram) is injected into the grinding mechanism at regular intervals through the water pump 8, water supply pipeline 11, and nozzle 12. Figure 14 As shown in the diagram, during the relative rotation of the lower grinding disc 4-3 and the upper grinding disc 4-2, the soybeans are ground sequentially through the coarse grinding zone and the fine grinding zone. The ground slurry is collected by the grinding disc receiving cavity 5-1 of the left and right connecting shells 5, and then sent to the filter screen 6-1 of the residue-liquid separation mechanism 6 through the slurry channel of the left and right connecting shells 5. At the same time, the filter screen drive motor assembly 6-3 drives the filter screen 6-1 and the guide plate 6-5 to rotate at high speed. Under the action of the guide plate 6-5 inside the filter screen and centrifugal force, the slurry is thrown onto the side wall of the filter screen 6-1, and small particles of soybean slurry are filtered out and flow along the filter screen. The outer wall of the filter screen 6-1 collects the liquid at the bottom soy milk outlet 5-3, and the liquid flows out through the outlet 5-3. The residue in the soy milk is trapped inside the filter screen 6-1 and falls into the residue collection box 6-2 under its own gravity, completing the grinding and residue separation process. To ensure a dry and clean environment when the soy milk maker is not in operation, the residual drinking water in the water supply pipe 11 must be drained before the soy milk maker stops working. The specific working principle is as follows: the control module 9 issues a command to connect the B and C ports of the three-way solenoid valve 7, draining the water remaining in the water supply pipe 11 to the outside of the machine (as shown in the attached diagram). Figure 15 (As shown).

Claims

1. A stone mill for grinding soybeans, characterized in that: The machine includes a base (1), a top cover assembly (2), a hopper (3), a grinding mechanism (4), left and right connecting shells (5), and a slag-liquid separation mechanism (6). The base (1) is equipped with a water tank (1-1), a grinding mechanism mounting seat (1-2), a slag-liquid separation mechanism mounting seat (1-3), and a base (1-4). The grinding mechanism (4) and the slag-liquid separation mechanism (6) are respectively assembled to the base (1) through the grinding mechanism mounting seat (1-2) and the slag-liquid separation mechanism mounting seat (1-3), and the two are arranged in a left-right configuration. The grinding mechanism (4) and the slag-liquid separation mechanism (6) are driven by two motors and operate independently. The hopper (3) is a cylindrical structure with radial contraction in the middle. Its upper end is the feed port and its lower end is the discharge port that connects with the grinding mechanism (4). The upper cover plate assembly (2) is hinged to the machine body base (1) and fastened to the feed port of the hopper (3). The left and right connecting shells (5) connect the grinding mechanism (4) and the slag-liquid separation mechanism (6) to collect the slurry generated after grinding and introduce it into the slag-liquid separation mechanism (6).

2. The stone mill soybean milk grinder according to claim 1, characterized in that: The grinding mechanism (4) is provided with a grinding disc support (4-1), an upper grinding disc (4-2), a lower grinding disc (4-3), and a grinding drive motor (4-4). The grinding disc support (4-1) is a split frame structure, including an upper support (4-1-1), a lower support (4-1-2), and a fastening connector (4-1-3). The bottom of the lower support (4-1-2) is fixedly assembled with the grinding mechanism mounting seat (1-2) of the machine body base (1). The upper end face of the lower support (4-1-2) forms a joint surface with the bottom surface of the upper support (4-1-1). The upper support (4-1-1) and the lower support are connected by the fastening connector (4-1-3). The brackets (4-1-2) are connected together, and circumferential positioning is achieved by a set of positioning pins (4-1-4) on the bottom surface of the upper bracket (4-1-1) cooperating with the positioning holes (4-1-5) on the upper end surface of the lower bracket (4-1-2). The grinding disc (4-2) is fixedly mounted on the upper bracket (4-1-1). The upper grinding disc (4-2) and the lower grinding disc (4-3) are arranged opposite to each other, with a gap of 0.05 to 0.6 mm reserved between them. The lower grinding disc (4-3) is fastened to the output shaft of the grinding drive motor (4-4). The grinding drive motor (4-4) is fitted with the lower bracket (4-1-2).

3. The stone mill soybean milk grinder according to claim 2, characterized in that: In the grinding mechanism (4), the grinding working surface of the upper grinding disc (4-2) is a concave curved surface structure, and the grinding working surface of the lower grinding disc (4-3) is a convex curved surface structure. Coarse grinding area and fine grinding area are distributed on the grinding working surfaces of the upper grinding disc (4-2) and the lower grinding disc (4-3). The coarse grinding area is located in the center, and the fine grinding area is a peripheral annular area. Reverse intersecting grinding patterns are set in the coarse grinding area and the fine grinding area of ​​the upper grinding disc (4-2) and the lower grinding disc (4-3).

4. The stone mill soybean milk grinder according to claim 3, characterized in that: The grinding mechanism (4) is further provided with a bean-picking assembly (4-5), which consists of bean-picking blades and a bean-picking drive unit. The bean-picking drive unit includes a drive shaft seat (4-5-2), a fork (4-5-3), and an eccentric gear ring (4-5-4). The drive shaft seat (4-5-2) is fixedly assembled with the output shaft of the grinding drive motor (4-4). The fork (4-5-3) is provided on the drive shaft seat (4-5-2). The eccentric gear ring... (4-5-4) is rotatably mounted on the upper bracket (4-1-1) of the grinding disc bracket (4-1), and the inner wall of the eccentric gear ring (4-5-4) is provided with a tooth groove that mates with the fork (4-5-3); the bean-picking blade is mounted on the eccentric gear ring (4-5-4), including an outer ring bean-picking blade (4-5-1) and an inner ring bean-picking blade (4-5-5), and the outer ring bean-picking blade (4-5-1) and the inner ring bean-picking blade (4-5-5) are arranged opposite to each other.

5. The stone mill soybean milk grinder according to claim 3 or 4, characterized in that: The left and right connecting shells (5) are provided with a grinding disc receiving cavity (5-1), a slurry channel (5-4) and a filter assembly receiving cavity (5-2); the upper end of the grinding disc receiving cavity (5-1) is an open structure, which is connected to the discharge port of the hopper (3) through the open structure, and the bottom surface is provided with a grinding motor assembly through hole, and its side is connected to the filter assembly receiving cavity (5-2) through the slurry channel (5-4); the filter assembly receiving cavity (5-2) is an open structure at the lower end.

6. The stone mill soybean milk grinder according to claim 5, characterized in that: The left and right connecting housings (5) are also provided with a soy milk outlet (5-3), which is located at the bottom of the side wall of the filter assembly receiving cavity (5-2).

7. The stone mill soybean milk grinder according to claim 6, characterized in that: The slag-liquid separation mechanism (6) is provided with a filter screen (6-1), a filter screen drive motor assembly (6-3), and a slag receiving box (6-2). The slag receiving box (6-2) is a barrel with an annular structure, which is fitted outside the slag-liquid separation mechanism mounting seat (1-3) of the machine body base (1). The upper opening is connected to the lower open structure of the filter assembly receiving cavity (5-2) of the left and right connecting shells (5). The filter screen drive motor assembly (6-3) is installed in the slag-liquid separation mechanism mounting seat (1-3), and its output shaft is fixedly connected to the filter screen (6-1). The filter screen (6-1) is a cone-shaped inverted mesh cover structure, which is placed in the filter assembly receiving cavity (5-2) of the left and right connecting shells (5). Its upper inlet is connected to the slurry channel (5-4) of the left and right connecting shells (5), and its lower outlet is opposite to the slag receiving box (6-2).

8. The stone mill soybean milk grinder according to claim 7, characterized in that: The filter screen (6-1) has a guide plate (6-5) on the upper inner side and a baffle ring (6-4) to prevent the soy milk from flowing back between the bottom outer side and the filter assembly receiving cavity (5-2) of the left and right connecting shells (5).

9. The stone mill soybean milk grinder according to claim 4, characterized in that: The feed inlet and outlet of the hopper (3) are eccentric structures, and the offset of its central axis is the same as the offset of the central axis of the eccentric toothed ring (4-5-4) of the bean-picking assembly (4-5) in the grinding mechanism (4).

10. The stone mill soybean milk grinder according to claim 7, characterized in that: A water supply pipeline control system is also provided, which includes a water pump (8), a three-way solenoid valve (7), a water supply pipeline (11), a nozzle (12), and a control module (9). The water pump (8) is placed on the base (1-4) of the machine body (1) and is located in the cavity below the grinding mechanism mounting base (1-2). The water inlet of the water pump (8) is connected to the water tank (1-1) of the machine body (1) through the water supply pipeline (11). A nozzle (12) extending to the feed inlet of the hopper is provided on one side of the water pump outlet. A three-way solenoid valve (7) is installed in the water supply pipeline on one side; the three-way solenoid valve (7) has three interfaces: A, B, and C. The opening and closing of different interfaces are controlled by the control module (9). When the stone mill soy milk machine is working, the control module (9) instructs the A and C interfaces of the three-way solenoid valve (7) to connect, and water is supplied to the grinding mechanism (4) through the water pump (8). Before the stone mill soy milk machine stops working, the control module (9) instructs the B and C interfaces of the three-way solenoid valve (7) to connect, and drain the water that is stuck in the water supply pipeline (11) to the outside of the machine body.

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