Integrated small soybean milk and uncongealed bean curd processing equipment

Abstract

The invention provides integrated small soybean milk and uncongealed bean curd processing equipment. The integrated small soybean milk and uncongealed bean curd processing equipment comprises a raw material storage system, a soybean soaking system, a soybean milk grinding system, a preparation system and an equipment frame. The systems are vertically arranged on multiple layers of separation layer plates in the frame in a layered manner and are communicated through pipelines; the raw material storage system is provided with a vacuum suction machine to convey dry soybeans to the soaking system, a bottom discharge valve of the soaking system discharges a soaked mixture to the grinding system, the grinding system grinds the mixture and then sends the mixture to the preparation system, and the preparation system heats or marinades the mixture into soybean milk or beancurd jelly. The equipment cancels long-distance conveying through gravity flow layout, is compact and miniaturized in structure, and adapts to a limited space environment; the control system provides a full-automatic mode and a semi-automatic mode to adapt to different operation habits. All the systems cooperate to improve the processing quality; operation and maintenance are convenient, the structure is reliable, integrated processing from dried soybeans to beancurd jelly is achieved, and the problems that traditional equipment is large in space, loose in process, large in quality fluctuation and the like are solved.

Description

Technical Field

[0001] This application relates to the field of soybean product processing technology, and in particular to an integrated small-scale soybean milk and tofu processing equipment. Background Technology

[0002] Soy milk and tofu pudding, as traditional breakfast foods, are widely loved for their rich nutrition and delicate texture. However, in current catering settings, the processing of soy milk and tofu pudding still relies on decentralized equipment or manual operation, making it difficult to meet the demands for small-scale, high-efficiency production. Traditional processes involve multiple steps such as soaking soybeans, grinding, boiling, and adding coagulant. The equipment is mostly large single machines or simple combinations, occupying a lot of space, consuming a lot of energy, and having long material transfer paths, which can easily lead to problems such as residual beany taste and protein loss. Especially in high-frequency demand scenarios such as hotels and canteens, existing equipment cannot achieve precise quantitative control, highlighting the contradiction between labor input and production efficiency, and urgently requiring a compact and integrated solution.

[0003] In the existing technology, soy milk and tofu processing equipment is mainly divided into two categories: one is a large-scale industrial production line, which is highly automated but bulky and not suitable for small and medium-sized kitchens; the other is a decentralized single-machine combination, such as independent soaking buckets, grinding machines, and cooking pots, which require manual material handling.

[0004] Such equipment has significant drawbacks: First, the fragmented process leads to long material paths, underutilization of gravitational potential energy, and increased energy consumption; second, the soaking process relies on room temperature settling, which can take more than 10 hours in winter, and the beany smell is not completely removed; third, uneven feeding during the grinding stage can easily lead to insufficient grinding or overloading, affecting the smoothness of the soy milk; fourth, the coagulation process relies on manual experience, resulting in unstable coagulation effects. Furthermore, existing equipment mostly uses a fixed structure, making cleaning and maintenance complex and difficult to adapt to diverse production needs. Summary of the Invention

[0005] This application addresses the problem that existing large-scale industrial production lines for soy milk and tofu pudding processing equipment are not suitable for small and medium-sized kitchens, and that the use of decentralized single-machine combinations is complex. It provides an integrated small-scale soy milk and tofu pudding processing equipment, including: a raw material storage system, a soybean soaking system, a soy milk grinding system, a preparation system, and an equipment frame. The equipment frame is a stainless steel metal frame supported at four corners and placed on the ground. Inside, the raw material storage system, soybean soaking system, soybean milk grinding system and preparation system are arranged vertically in layers through multiple partition plates. The raw material storage system, soybean soaking system, soybean milk grinding system and preparation system are connected by pipelines. The raw material storage system is located on one side of the equipment frame and is used to store dried soybeans; a vacuum feeder is installed on the upper layer of the equipment frame, which is used to transport a fixed amount of dried soybeans in the raw material storage system to a special bucket for soaking soybeans in the soybean soaking system. The soybean soaking system is located directly below the raw material storage system and is used to soak dried soybeans and change the water at regular intervals. The bottom of the soybean soaking system is equipped with a discharge valve to discharge the soaked soybean and water mixture to the soybean milk grinding system located directly below the soybean soaking system. The soybean grinding system is located directly below the soybean soaking system. It receives the soaked soybeans, grinds them to form initial soybean milk, separates the soybean residue, and transports the initial soybean milk to the preparation system. The preparation system is located on the other side of the equipment frame. It receives the initial soy milk through pipelines and heats and cooks the initial soy milk to obtain soy milk, or performs a curdling process to make tofu pudding.

[0006] In one feasible implementation, the raw material storage system includes a soybean storage hopper and a vacuum feeder; The soybean storage hopper is a stainless steel storage box, installed on one side of the equipment frame, and equipped with a weighing electronic scale at its bottom; The vacuum feeder includes a vortex blower, a feeding hopper, and a negative pressure pipeline; One end of the negative pressure pipeline is connected to the outlet of the soybean storage hopper, and the other end is connected to the inlet of the feeding hopper; The vortex blower is located on one side of the soybean storage hopper and is connected to the top of the feeding hopper via a pipeline. The vortex blower is used to generate negative pressure to draw soybeans from the soybean storage hopper into the feeding hopper. The feeding hopper is a fixed-volume hopper, and a counterweight flap valve is provided at the bottom;

[0007] The counterweight flap valve is connected to the opening of the bucket lid of the soybean soaking system.

[0008] In one feasible implementation, the soybean soaking system includes a special tank for soaking soybeans, a bottom discharge valve, a stirring device, an aeration system, a high-pressure water injection system, a water and air supply unit, and a drainage system. The special bucket for soaking soybeans is made of stainless steel and has a conical bottom with a taper of 30°-50°. The bottom discharge valve is located at the lowest point of the bottom of the special bucket for soaking soybeans, and includes a discharge pipe and a ball valve. The ball valve is installed in the discharge pipe. One end of the discharge pipe is connected to the bottom of the special bucket for soaking soybeans, and the other end is connected to the soybean grinding system. The lid of the special bucket for soaking soybeans is provided with a flip-top opening, and the stirring device is installed on the outside of the flip-top opening. The stirring device includes a low-speed motor and a rotating shaft. The low-speed motor is connected to the rotating shaft through a reducer, and the rotating shaft extends into the special bucket for soaking soybeans to the upper end of the bottom discharge valve pipe. The rotating shaft includes a straight section and an arc section. The straight section is close to the low-speed motor and the bottom discharge valve, and the arc section is located in the middle section of the rotating shaft. The water and gas supply unit includes a water tank, a variable frequency booster pump, and an air compressor; The aeration system is located at the bottom of the special bucket for soaking soybeans and is connected to an air compressor to inject air into the special bucket for soaking soybeans. The high-pressure water injection system is installed on the top of the special bucket for soaking soybeans and is connected to the water tank and the variable frequency booster pump to inject water into the special bucket for soaking soybeans. The drainage system includes an electric drain valve and a drain pipe. The drain pipe is connected to the bottom of the special bucket for soaking soybeans. A nut is fixed to one end of the drain pipe inside the special bucket for soaking soybeans. The surface of the nut has fine holes for draining water to the outside. The drain pipe is controlled to drain water through the electric drain valve.

[0009] In one feasible implementation, the aeration system includes an annular air injection pipe; The annular air injection pipe is located at the bottom of the special bucket for soaking soybeans. One end of the annular air injection pipe is a closed end, and the pipe wall is provided with multiple evenly distributed 1mm-1.5mm holes. The other end of the annular air injection pipe is connected to the air compressor through an air pump pipe. The high-pressure water injection system includes a ring-shaped water injection pipe, a stainless steel water tank, and a variable frequency booster pump. The annular water injection pipe is located at the top of the special bucket for soaking soybeans. One end of the annular pipe is a closed end, and the pipe wall is provided with multiple evenly distributed 1mm-1.5mm holes. The other end of the annular water injection pipe is connected to the water tank and the booster pump through a water pipe.

[0010] In one feasible implementation, the soybean milk grinding system includes a main grinding machine system; The main system of the pulper includes the pulper and the pulper mounting frame; The grinding machine is a pulp-residue separation type grinding machine. The feed hopper of the grinding machine is located at the lower end of the discharge pipe and is used to grind the soaked soybeans into soy milk and separate the soy residue. The pulper mounting frame is used to fix the pulper; The grinding machine mounting frame is equipped with a drainage slope composite base plate, a floor drain, and a removable water baffle. The drainage slope composite base plate has a slope and faces the floor drain, which is located at the lowest point of the drainage slope composite base plate. The detachable water baffle is a movable metal semi-enclosed strip plate, which is installed through a metal column slot and has a rubber sealing strip.

[0011] In one feasible implementation, the pulper mounting frame is further provided with a linear slide rail, a positioning pin, and a ground drainage pipe; The linear slide rail is installed between the bottom surfaces of the equipment frame and the grinding machine mounting frame; When the pulper mounting frame is reset, the positioning pin is fixed by two tapered pins on the front and one tapered pin on each side. The ground drainage pipe is placed at the bottom or side of the equipment frame and connected to a drainage pump.

[0012] In one feasible implementation, the soybean milk grinding system further includes: an auxiliary and cleaning system; The auxiliary and cleaning system includes a secondary grinding kit, an internal cleaning system, and a cleaning inspection system; The secondary grinding kit includes a micro gear pump, a handheld electric mixer, and two soybean residue slurry containers. The micro gear pump and handheld electric mixer are installed in the grinding machine mounting frame and are used to extract soybean residue slurry and stir the mixture of soybean residue and water. The two soybean residue slurry containers are used to receive soybean residue from primary grinding and soybean residue from secondary grinding, respectively. The internal cleaning system includes a multi-point water spray device, which is detachably installed on the top cover, cavity and soybean residue discharge guide plate of the grinder, and is used to clean the inside of the grinder to remove soybean residue. The cleaning inspection system includes an inspection port, a flexible rod, an illuminated camera, and a display screen; The inspection port is located on the top cover of the pulper. One end of the flexible rod is fixed to the lighting camera, which is inserted into the cavity of the pulper through the inspection port. The camera captures images of the cleaning effect and displays them on the display screen.

[0013] One feasible implementation also includes: a pulp feeding system; The grinding and feeding system is located directly below the soybean soaking system and directly above the soybean grinding system, and is used to receive and temporarily store the soybean and water mixture discharged from the soybean soaking system. The pulp feeding system includes a slide rail, a housing, a screw conveyor, and a geared motor; The slide rail has a drawer-type structure and is installed on the equipment frame to support the box body and enable drawer-type pull-out. The box is a rectangular box with an open top, which is embedded into the equipment frame via the slide rail. Its opening is located directly below the special tank for soaking soybeans in the soybean soaking system, and is used to receive the mixture of soybeans and water discharged from the discharge valve at the bottom of the special tank for soaking soybeans. The geared motor is a low-speed small geared motor, which is fixed on the outside of the box body, and the output shaft of the geared motor is connected to the screw conveyor; The screw conveyor is a horizontal auger screw conveyor, which is installed on the bottom surface of the box and driven by the geared motor. The output end of the screw conveyor faces the feed hopper of the soybean milk grinding system.

[0014] In one feasible implementation, the bottom surface of the grinding feed system box is sloped and has an elongated discharge port. The elongated discharge port is equipped with an adjustable compartment door, which is a movable elongated metal plate with a handle. The box body is provided with a drainage plate with dense holes on one side, and a drainage pipe is welded to the side wall of the box body near the drainage plate, and the drainage pipe is connected to the external drainage structure. The box body is provided with a side flap on the front, which is used to remove the unprocessed soybeans inside the box.

[0015] In one feasible implementation, the preparation system includes a stirring device and a cooking and brine-addition execution component; The stirring device includes a stirring paddle assembly; The cooking and brine-adding execution components include a cooking tank, an electronic scale, a heating source, a brine-adding agent device, and a sensor group; The stirring paddle assembly is located at the center of the cooking tank and is used for stirring inside the cooking tank. The heating source is used to heat the liquid in the cooking tank. The heating source is an induction cooker or a steam generator. The steam generator provides high-pressure steam and constant-temperature hot water. The electronic scale is a heat-insulated electronic scale with an LCD screen, installed below the steaming barrel, and is used to display the weight of the soy milk in the steaming barrel; The brine additive device contains three brine additive boxes, which are respectively filled with magnesium chloride brine, gypsum emulsion and defoamer; The bottom of the halogenation agent box is provided with a downward-facing metal tube and an electric ball valve is installed. The lower end of the electric ball valve is connected to a stainless steel capillary tube, and the lower end of the stainless steel capillary tube faces the cooking tank. The stainless steel capillary tube is equipped with a micro flow manual regulating valve for quantitatively adding magnesium chloride brine, gypsum emulsion and defoamer into the cooking tank. The sensor group includes an infrared temperature sensor and a distance sensor. The infrared temperature sensor is used to monitor the temperature of the soy milk in the steaming bucket, and the distance sensor is used to monitor the liquid level of the soy milk in the steaming bucket.

[0016] In one feasible implementation, the stirring device further includes a horizontal rotation drive platform and a vertical lifting drive assembly; The stirring paddle assembly includes a vertical hexagonal shaft, a horizontal rod, and a single blade; The upper part of the vertical hexagonal shaft is connected to a nut or cylinder with a threaded connection, and the lower part is welded with a horizontal rod. The single blade is welded to the other side of the horizontal rod. The single blade is a stainless steel square sheet plate, and the edge of the single blade has a gap with the inner wall of the cooking tank. The horizontal rotation drive platform is positioned above the stirring paddle assembly. The lower part of the horizontal rotation drive platform is connected to the hexagonal shaft through a matching sleeve with a hexagonal inner hole. The horizontal rotation drive platform is equipped with a reducer to drive the horizontal rotation drive platform to drive the hexagonal shaft to rotate horizontally. The vertical lifting drive assembly is connected to the hexagonal shaft to drive the hexagonal shaft to move up and down. The vertical lifting drive assembly is one of the following: ball screw guide, cylinder piston rod, gear rack, or synchronous belt.

[0017] One feasible implementation also includes a control system; The control system includes a centralized touch screen, independent start / stop buttons, and a main equipment controller; The centralized touch screen is located next to each section and is used to select fully automatic / semi-automatic mode, and to display weight, images, parameters and alarms in real time; The independent start / stop buttons are located next to each section to achieve segmented control; The main controller of the equipment is configured as follows: In fully automatic mode, set the operating parameters and send instructions to the vortex blower of the vacuum feeder, the low-speed motor and electric ball valve of the soybean soaking system, the horizontal rotation drive platform and vertical lifting drive group of the stirring device, and the electric ball valve of the brine additive device, and receive feedback adjustment parameters. In semi-automatic mode, it receives independent start / stop button commands to start or stop the corresponding work section. The operating parameters include: feed rate, soaking time, grinding time, boiling temperature, and amount of coagulant added.

[0018] This application provides an integrated small-scale soy milk and tofu processing equipment. Through gravity flow layout and vertical integration design, it integrates five major systems—raw material storage, soaking, grinding and feeding, grinding, and preparation—into a compact frame, eliminating long-distance transportation. The equipment size is significantly smaller than traditional decentralized equipment, making it suitable for space-constrained scenarios such as restaurants and canteens. The control system offers fully automatic and semi-automatic modes. Fully automatic mode uses a centralized touchscreen for parameter setting and closed-loop control, while semi-automatic mode uses independent buttons for segmented operation, adapting to different user habits. During processing, the soaking system uses a steeply sloping conical bottom, stirring shaft, and air-water injection triple mechanism to solve discharge blockage. Composite bottom heating or heating tubes shorten soaking time in winter, improving daily utilization. The grinding and feeding system uses buffer storage and spiral quantitative feeding, combined with a secondary grinding kit to achieve fine grinding, improving protein extraction rate and soy milk smoothness. The preparation system uses composite stirring, quantitative additives, and sensor monitoring to ensure the soy milk doesn't burn during cooking, the coagulation is uniform, and the tofu has a consistent texture. The entire process from dried soybeans to tofu pudding is integrated, solving the pain points of traditional equipment such as large space requirements, scattered processes, high reliance on manual labor, and large quality fluctuations, and meeting the needs of high-frequency quantitative production. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the implementation of the invention and, together with the description, serve to explain the principles of the embodiments of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] Figure 1 This is a schematic diagram of the structure of an integrated small-scale soy milk and tofu processing device shown in an exemplary embodiment of this application; Figure 2 yes Figure 1 Rear view; Figure 3 yes Figure 2 Cross-sectional view; Figure 4 This is a front structural schematic diagram of a soybean soaking system shown in an exemplary embodiment of this application; Figure 5 yes Figure 4 Cross-sectional view; Figure 6 This is a three-dimensional structural schematic diagram of a soybean soaking system shown in an exemplary embodiment of this application; Figure 7 This is a schematic cross-sectional view of a soybean milk grinding system illustrated in an exemplary embodiment of this application; Figure 8 This is a front structural schematic diagram of a pulper mounting frame shown in an exemplary embodiment of this application; Figure 9This is a three-dimensional structural schematic diagram of a pulper mounting frame shown in an exemplary embodiment of this application; Figure 10 This is a front structural schematic diagram of a pulp feeding system shown in an exemplary embodiment of this application; Figure 11 This is a three-dimensional structural schematic diagram of a pulp feeding system shown in an exemplary embodiment of this application; Figure 12 This is a schematic diagram of the preparation system shown in an exemplary embodiment of this application; Figure 13 yes Figure 12 Cross-sectional view.

[0021] Attached image captions: 100 - Raw material storage system; 110 - Storage hopper; 111 - Weighing scale; 120 - Vacuum feeder; 121 - Vortex blower; 122 - Feeding hopper; 123 - Negative pressure pipeline; 200-Soybean soaking system; 210-Soaking tank; 211-Flip-top opening; 220-Bottom discharge valve; 221-Discharge pipe; 222-Ball valve; 230-Stirring device; 231-Low-speed motor; 232-Rotating shaft; 240-Aeration system; 241-Annular air injection pipe; 250-High-pressure water injection system; 251-Annular water injection pipe; 260-Water and air supply unit; 261-Water tank; 262-Variable frequency booster pump; 263-Air compressor; 270-Drainage system; 300-Pulping feed system; 310-Slide rail; 320-Box body; 330-Screw conveyor; 340-Gear motor; 350-Adjustable compartment door; 370-Side flap; 380-Drainage board; 400 - Soy milk grinding system; 410 - Grinding machine main body system; 411 - Grinding machine; 412 - Mounting frame; 420 - Cleaning system; 421 - Grinding kit; 422 - Internal cleaning system; 4121 - Drainage slope composite base plate; 4122 - Floor drain; 4123 - Removable baffle plate; 4124 - Linear slide rail; 4125 - Positioning pin; 4126 - Ground drain pipe; 500 - Preparation system; 510 - Stirring device; 511 - Stirring paddle assembly; 512 - Horizontal rotary drive platform; 513 - Vertical lifting drive assembly; 520 - Brine dispensing actuator; 521 - Cooking tank; 522 - Electronic scale; 523 - Brine dispensing agent adding device; - Sensor assembly; 525 - Steam generator; 600 - Equipment frame. Detailed Implementation

[0022] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the embodiments of the invention will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a full understanding of how embodiments of the invention are carried out.

[0023] Soy milk and tofu pudding are traditional breakfast foods, popular for their rich nutrition and smooth texture. However, in current catering settings, their processing relies on decentralized equipment or manual labor, making it difficult to meet the demands for small-scale, high-efficiency production. Traditional processes involve numerous steps, large equipment footprints, high energy consumption, and long material transport paths, which can lead to problems such as residual beany flavor and protein loss. In high-frequency demand scenarios, existing equipment struggles to achieve precise quantitative control, resulting in a significant conflict between labor input and production efficiency, necessitating a compact and integrated solution.

[0024] To address the aforementioned problems, this application provides an integrated small-scale soy milk and tofu processing device, as described above. Figures 1-3 As shown, it includes: a raw material storage system 100, a soybean soaking system 200, a soybean milk grinding system 400, a preparation system 500, and an equipment frame 600, with each system connected by pipelines.

[0025] The equipment frame 600 is a stainless steel metal frame supported at four corners. Inside, the raw material storage system 100, soybean soaking system 200, soybean milk grinding system 400, and preparation system 500 are arranged vertically in layers through multiple partitions. The equipment frame 600 serves as the overall supporting structure, installed at four corners with support panels, and the multi-layered partitions enable the vertical layering of functional components, providing a fixed foundation for each system.

[0026] The raw material storage system 100 is located on one side of the equipment frame 600 and is used to store dried soybeans; the soybean soaking system 200 is located below the raw material storage system 100, and the two correspond perfectly by vertical projection; the soybean milk grinding system 400 is located directly below the soybean soaking system 200 and receives the material discharged from it; the preparation system 500 is located on the other side of the equipment frame 600 and is connected to the soybean milk grinding system 400 through pipelines.

[0027] Specifically, the vacuum feeder 120 of the raw material storage system 100 transports dried soybeans through pipelines to the soybean soaking system 200's dedicated soaking tank 210. The soybean soaking system 200 soaks the dried soybeans and changes the water periodically. After soaking, the soybean-water mixture is discharged through the bottom discharge valve 220 and transported to the soybean milk grinding system 400. The soybean milk grinding system 400 then transports the initial soybean milk formed through grinding to the preparation system 500 via pipelines. The preparation system 500 receives the initial soybean milk and either heats and cooks it to obtain soy milk, or performs a coagulation process to make tofu pudding. The entire equipment is integrated from top to bottom according to the material preparation process, with each system forming a continuous material channel through pipelines, realizing integrated processing from dried soybeans to tofu pudding.

[0028] Understandably, traditional soybean product processing equipment features a dispersed layout of functional components, requiring long-distance conveying mechanisms for material transport. This results in bulky equipment with a large footprint, making it unsuitable for space-constrained environments such as restaurants and canteens. Furthermore, traditional equipment has independent systems with low integration, requiring multiple machines to operate simultaneously and increasing manual operation. This embodiment, however, utilizes a multi-layered vertical layout within the equipment frame (600mm) to arrange the systems sequentially along the direction of gravity. Materials flow downwards due to gravity, eliminating long-distance conveying mechanisms and shortening the material path.

[0029] Furthermore, this embodiment integrates four major systems—raw material storage, soaking, grinding, and preparation—within a single equipment frame 600. These systems are connected via pipelines to form a continuous processing flow, reducing the number of devices and human intervention. Logical relationship: The linkage process is centered on gravity flow. Each system starts sequentially in the order of "feeding → soaking → grinding → preparation," with automatic material transfer achieved through pipelines. The vertical layout and gravity flow design achieve miniaturization and integration, making it suitable for space-constrained environments such as hotel kitchens and public canteens. Simultaneously, the elimination of long-distance conveying mechanisms reduces the risk of material contamination and improves processing efficiency. It features a compact structure, small footprint, high degree of automation, and suitability for high-frequency quantitative production, effectively solving the problems of large space occupation and dispersed processes in traditional equipment.

[0030] In some embodiments of this application, reference continues to be made to Figures 1-3 The raw material storage system 100 consists of a soybean storage bin 110 and a vacuum feeder 120. The soybean storage bin 110 serves as the source of raw material supply. Its storage box is made of 304 stainless steel and is installed on one side of the equipment frame 600. The lower part of the bin is equipped with a weighing electronic scale 111, which can display the remaining weight, initial weight and current weight of the soybeans in the bin in real time.

[0031] The vacuum feeder 120 includes a vortex blower 121, a feeding hopper 122, and a negative pressure pipe 123. The vortex blower 121, as the core power source, is located beside the soybean storage hopper 110. The negative pressure pipe 123 connects the outlet of the storage hopper 110 to the inlet of the feeding hopper 122, utilizing the generated negative pressure airflow to transport materials. The feeding hopper 122 is a fixed-volume hopper used to receive soybeans sucked in by negative pressure and serve as an intermediate temporary storage container. A counterweight flap valve installed at its bottom can be connected to the lid opening of the soybean soaking system 200's special soybean soaking bucket 210 via clips, screws, or a hose. It automatically opens and controls unloading based on gravity, thus forming a continuous feeding process of "storage → negative pressure suction → temporary storage → gravity unloading".

[0032] During the feeding operation, the vortex blower 121 of the vacuum feeder 120 is first started to create a negative pressure environment in the pipeline, drawing the dry soybeans from the soybean storage hopper 110 into the feeding hopper 122 through the negative pressure pipeline 123. When the material level sensor built into the feeding hopper 122 detects that the material level has reached the preset value, the vortex blower 121 automatically stops, and the negative pressure in the feeding hopper 122 disappears. At this time, the counterweight flap valve at the bottom of the feeding hopper 122 automatically opens under its own gravity, and the soybeans in the hopper fall from the flap valve opening into the soybean soaking system 200's soaking bucket 210 directly below. Throughout the process, the weighing scale 111 continuously displays the remaining weight in the soybean storage hopper 110 and the amount extracted this time, providing accurate quantitative basis for the next feeding.

[0033] To improve feeding efficiency and reduce costs, this system supports one vortex blower 121 equipped with multiple feeding hoppers 122, such as hopper A and hopper B. By controlling the opening and closing of the negative pressure channel corresponding to each feeding hopper 122 through an electrically controlled ball valve or a pneumatic ball valve, a flexible feeding mode of one machine with multiple hoppers can be realized, effectively reducing the number of equipment configurations, and is especially suitable for feeding scenarios with multiple foaming tanks.

[0034] The core of the equipment operation in this embodiment lies in the synergistic effect of negative pressure adsorption, material level control, and gravity unloading. The start and stop of the vortex blower 121 are intelligently controlled by the material level sensor, while the opening of the counterweight flap valve relies entirely on gravity, together achieving automation of the feeding operation. This design effectively solves the problems of complex mechanical structure, insufficient quantitative accuracy, and high cost of multi-bin feeding in traditional feeding methods. Through negative pressure adsorption technology, real-time weighing monitoring, and flexible configuration of multiple bins in one machine, the feeding process is significantly optimized.

[0035] In this embodiment, the feeding process is fully automated, eliminating the manual handling step. Material transfer is completed through negative pressure adsorption and gravity unloading, significantly reducing the intensity of manual labor. In terms of quantitative control, the coordinated use of the weighing electronic scale 111 and the fixed volume of the feeding hopper 122 ensures that the feeding amount each time accurately meets the requirements of the foaming tank 210, achieving accurate matching of material requirements between upstream and downstream processes.

[0036] It is understandable that the vacuum feeder 120 can be designed as either a separate unit (i.e., the vortex blower 121 and the feeding hopper 122 are separate) or an integrated unit. In this embodiment, the separate structure allows the feeding hopper 122 to be directly installed on the top cover of the soaking tank 210 or connected via a flexible hose, resulting in a more compact layout and space-saving design. The multi-hopper feeding capability further enhances flexibility; one vortex blower 121 can be paired with multiple feeding hoppers 122, feeding different soaking tanks 210 respectively, adapting to different times and quantities of soybeans required.

[0037] In some embodiments of this application, reference is made to Figures 4-6 As shown, the soybean soaking system 200 consists of a special tank for soaking soybeans 210, a bottom discharge valve 220, a stirring device 230, an aeration system 240, a high-pressure water injection system 250, a water and air supply unit 260, and a drainage system 270.

[0038] The 210 special bucket for soaking soybeans is made of 304 stainless steel and is located directly below the raw material storage system 100. The 304 stainless steel body not only has excellent corrosion resistance and can withstand acidic or alkaline environments that may exist during soaking, ensuring the hygiene and safety of the soaked soybeans, but its smooth inner wall also facilitates cleaning, preventing impurities and bacterial growth. The bottom of the bucket is conical with an angle of 30°-50°. The steep conical bottom facilitates the flow of soaked soybeans towards the center. For example, when the bottom slope is 45°, the soybeans can more smoothly gather towards the center of the bottom under their own weight, effectively reducing residue and facilitating subsequent discharge processes.

[0039] The bucket lid is equipped with a flip-top opening 211 for manual inspection of the soaking process. The design of the flip-top opening 211 takes into account both sealing performance and ease of operation. During normal soaking, the internal environment of the bucket is kept stable. When it is necessary to check the soaking progress or to make manual intervention, the operator can easily open the flip-top for observation and operation without completely disassembling the bucket lid, which simplifies the operation process.

[0040] The drainage system 270 includes an electric drain valve and a drain pipe. The drain pipe is connected to the bottom of the special bucket 210 for soaking soybeans. A nut is fixed to one end of the drain pipe inside the special bucket 210 for soaking soybeans. The surface of the nut has fine holes for draining water to the outside. The drain pipe is controlled to drain water through the electric drain valve.

[0041] The fine-mesh design of the nut effectively traps the soaked soybeans, preventing them from entering the drain pipe and causing blockages, thus ensuring smooth drainage. When drainage is complete, the control system activates the electric drain valve, allowing the wastewater to be quickly discharged from the container through the drain pipe. After drainage, the electric drain valve automatically closes, preventing external contaminants from entering the container and ensuring hygienic conditions in subsequent processing stages. This structural design achieves automated drainage control while the nut's filtering effect protects the stable operation of the drainage system.

[0042] The drainage system 270 is used to quickly discharge soaking wastewater, enabling multiple soaking cycles. The drain pipe is designed with a slope to facilitate natural wastewater flow and prevent water accumulation. The drain pipe can also be connected to an external drainage system to ensure a clean production environment. Furthermore, the drainage system 270 can be linked with the equipment's control system to automatically open the electric drain valve after the set soaking time, achieving intelligent operation and further reducing manual intervention.

[0043] The bottom discharge valve 220 is installed at the lowest point of the bucket and includes a discharge pipe 221 and a ball valve 222. One end of the discharge pipe 221 is connected to the bottom of the bucket and the other end is connected to the soybean grinding system 400. It has a large orifice to ensure smooth flow. The ball valve 222 is electric or pneumatic, with switch feedback, manual emergency button and IP65 waterproof rating. It is used to control the discharge of the soybean and water mixture after soaking.

[0044] Once soaking is complete, the ball valve 222 can be opened according to a preset program or manual instruction. The mixture of soaked soybeans and water then flows smoothly from the lowest point of the container to the soybean grinding system 400 under gravity, along the discharge pipe 221 with its large orifice design. Simultaneously, the ball valve 222 can be manually opened or closed to ensure the continuity and safety of the production process. The IP65 waterproof rating allows the bottom discharge valve 220 to operate stably in humid soaking environments, effectively preventing damage to internal electrical components or mechanical structures from moisture and dust, extending the valve's service life and reducing maintenance costs.

[0045] The stirring device 230 includes a low-speed motor 231 and a rotating shaft 232. The low-speed motor 231 is mounted on the bucket lid. The rotating shaft 232 is driven by the low-speed motor 231 through a reducer and extends into the bucket to the upper end of the bottom discharge valve 220. Its function is to moderately stir the soybeans during the soaking process, ensuring that the soybeans are in full contact with the soaking water and that the soaking is uniform. The rotating shaft 232 includes a straight section and an arc section. The straight section is close to the low-speed motor 231 and the bottom discharge valve 220, while the arc section is located in the middle section of the rotating shaft 232. This combination structure increases the contact area with the soybeans to agitate the soybeans in the bucket and prevents them from accumulating and clogging the discharge pipe.

[0046] The aeration system 240 has an annular air injection pipe 241 located at the bottom of the tank, connected to the air compressor 263 of the water-air supply unit 260. This allows air to be injected into the bottom of the tank, suspending the soaked soybeans in the air-liquid mixture and preventing discharge blockage. The high-pressure water injection system 250 has an annular water injection pipe 251 located at the top of the tank, connected to the water tank 261 of the water-air supply unit 260 and the variable frequency booster pump 262. This allows high-pressure water to be injected into the tank to assist the flow of the mixture and ensure thorough discharge.

[0047] Specifically, after the aeration system 240 is turned on, the air compressor 263 continuously supplies compressed air to the annular air injection pipe 241. This air is released through the annular air injection pipe 241, forming a large number of bubbles. As these bubbles rise, they carry the soybean particles at the bottom of the tank, keeping them in a suspended and tumbling state. This not only effectively prevents the soybeans from settling and clumping at the bottom of the tank, thus avoiding discharge blockage, but also increases the contact area between the soybeans and water, promoting uniformity in the soaking process. At the same time, the air-liquid mixing environment also helps to carry some tiny impurities or bubbles generated during the soaking process to the water surface, facilitating subsequent cleaning and treatment, and further improving the quality of the soaked soybeans.

[0048] The water and air supply unit 260 includes a water tank 261, a variable frequency booster pump 262, and an air compressor 263 (including an air storage tank). The water tank 261 stores water for soaking and cleaning, the variable frequency booster pump 262 provides high-pressure water injection power, the air compressor 263 provides high-pressure air, and the air storage tank ensures a stable air supply, providing air and water for the aeration system 240 and the high-pressure water injection system 250. All systems are arranged around the special tank 210 for soaking soybeans, working together to achieve soaking, water changing, and material discharge functions. During material discharge, the stirring device 230, the aeration system 240, and the high-pressure water injection system 250 are activated simultaneously.

[0049] Specifically, during the soaking stage, dried soybeans fall into the special soaking bucket 210 through the feeding hopper 122. The automatic water inlet valve is opened to inject water for soaking. After the set time is reached, the electric drain valve is opened to drain the wastewater. The process of water inlet and drain is repeated to complete two water exchange cycles.

[0050] During the discharge stage, after the soaking is completed, the low-speed motor 231 of the stirring device 230 starts, the rotating shaft 232 rotates and stirs the soybeans, the annular air injection pipe 241 of the aeration system 240 injects air into the bottom of the bucket through the air compressor 263 to suspend the soybeans, the annular water injection pipe 251 of the high-pressure water injection system 250 injects high-pressure water into the bucket through the variable frequency booster pump 262 to assist the flow, the ball valve 222 of the bottom discharge valve 220 opens, and the soaked mixture flows into the soybean milk grinding system 400 through the discharge pipe 221 under the action of gas-liquid mixing.

[0051] This embodiment solves the problem that traditional foaming buckets rely on gravity discharge, which easily leads to material accumulation, insufficient discharge volume, and easy blockage. It solves the problem by using a stirring device 230 to rotate the shaft 232 to stir, a bottom aeration system 240 to support the air, and a high-pressure water injection system 250 to flush. In addition, the large-slope conical bottom of the bucket ensures that the gravity component is greater than the friction force, thus ensuring smooth discharge.

[0052] In some embodiments, the long soaking time of soybeans in winter low temperatures affects the utilization rate of the equipment. The system supports the heating of the 210 composite bottom of the soaking tank. The bottom of the tank can be filled with an aluminum foam heat-conducting layer and a heating plate or a heating pipe inside the tank to control the water temperature at 28 to 35 degrees Celsius, which can shorten the soaking time to 5 to 6 hours.

[0053] In some embodiments of this application, the aeration system 240 and the high-pressure water injection system 250 work together in the soybean soaking system 200 to provide auxiliary functions during the discharge stage. The aeration system 240 includes an annular air injection pipe 241 located at the bottom of the soybean soaking tank 210. One end is closed, and the pipe wall has multiple evenly distributed 1mm-1.5mm holes, which are angled downwards at 45°. These holes can be arranged annularly between the 3 o'clock and 4 o'clock and 8 o'clock and 9 o'clock positions on the pipe wall. The other end is connected to the air compressor 263 of the water-air supply unit 260 through an air pump pipe to evenly inject air into the bottom of the tank. The airflow is sprayed through the angled small holes to suspend the soaked soybeans under the action of air bubbles, preventing blockage of the central pipe diameter at the bottom of the tank during discharge.

[0054] The high-pressure water injection system 250 includes an annular water injection pipe 251, a water tank 261, and a variable frequency booster pump 262. The annular water injection pipe 251 is located at the top of the special bucket 210 for soaking soybeans. One end is a closed end, and the pipe wall has multiple evenly distributed 1mm-1.5mm holes. The other end is connected to the water tank 261 and the variable frequency booster pump 262 through a water pipe to inject high-pressure water into the bucket. The water jet is sprayed through the oblique holes to form an impact force, which helps the soybean and water mixture to flow towards the discharge pipe diameter to ensure thorough discharge.

[0055] The air pump pipe and water pipe serve as connecting conduits, respectively transmitting high-pressure air from the air compressor 263 and high-pressure water from the water tank 261 to the corresponding annular pipes. The air compressor 263 of the water and air supply unit 260 provides a high-pressure air source, the water tank 261 stores water for soaking and cleaning, the variable frequency booster pump 262 provides high-pressure water injection power, and the air storage tank ensures a stable air source, all working together to support the aeration and water injection functions.

[0056] During discharge, the aeration system 240 and the high-pressure water injection system 250 start simultaneously. The angled design of the small holes in the annular air injection pipe 241 reduces the obstruction of soybean particles. The annular water injection pipe 251 and the air injection pipe form a gas-liquid mixture flow, improving the suspension effect of soybeans. Combined with the bottom structure of the tank, the mixture is discharged smoothly. This design solves the problems of easy clogging of traditional large-diameter straight-hole pipes, poor dispersion effect of single water injection, and accumulation due to improper layout. It achieves pipes that are less prone to clogging, extending the maintenance cycle, and thorough discharge with no raw material waste. The action points are optimized for bottom suspension and overall flow, and the integrated structure of the pipes and tank is simple and does not take up extra space.

[0057] In some embodiments of this application, reference is made to Figures 7-9 As shown, the soybean milk grinding system 400 includes a main grinding machine system 410, which consists of a grinding machine 411 and a grinding machine mounting frame 412. The grinding machine 411 is a pulp-residue separation type grinding machine. The feed hopper is located at the lower end of the discharge pipe 221 of the discharge valve 220 at the bottom of the soybean soaking system 200, directly receiving the mixture of soaked soybeans and water. It is used to grind the mixture into raw soybean milk and separate the soybean residue through the built-in structure. The soybean residue is discharged from the residue outlet, and the soybean milk flows out from the milk outlet to the preparation system 500.

[0058] The grinding mill mounting frame 412 is used to fix the grinding mill 411. It is installed on the bottom plate of the equipment frame 600 and is fastened to the bottom plate of the equipment frame 600 by rubber feet, providing stable support to avoid vibration and displacement during grinding.

[0059] The grinding machine mounting frame 412 is equipped with a drainage slope composite base plate 4121, a floor drain 4122, and a removable water baffle 4123. The drainage slope composite base plate 4121 is an inclined stainless steel base plate welded to the bottom plane foundation or a laid plastic molded base plate, with a slope of more than 3% facing the floor drain 4122, used to guide cleaning water and leaking water to the floor drain 4122 to prevent water accumulation; the floor drain 4122 is located at the lowest point of the base plate, collecting wastewater centrally; the removable water baffle 4123 is a movable metal semi-enclosed strip plate, installed through metal column slots on the lower half of the four facades of the equipment frame 600, with rubber sealing strips, protecting the frame from water splashing out of the equipment frame 600 when cleaning the grinding machine 411. All structures are arranged around the grinding machine 411, forming an integrated support for fixing, drainage, and water blocking, ensuring stability during the grinding process and convenient cleaning.

[0060] This embodiment solves the problems of easy displacement of the grinder when placed directly on the ground without fixation, water splashing and accumulation during cleaning, and space-consuming separation between structure and installation. Stability is achieved through rubber feet, and the combination of the drainage slope composite base plate 4121 and the floor drain 4122 enables non-powered drainage. The removable water baffle 4123 can be manually installed to meet cleaning and water-blocking needs. The grinder 411 is integrated with the mounting frame 412, giving the frame its own drainage and water-blocking function, reducing additional space occupation. During overall use, the foamed mixture enters the grinder 411 through the discharge pipe 221 for grinding and separating soybean milk and soybean residue. During cleaning, water flows through the drainage slope composite base plate 4121 and converges into the floor drain 4122. The removable water baffle 4123 provides splash protection, achieving integrated grinding and cleaning, and featuring stable fixation, good drainage, strong water blocking, and integrated structure.

[0061] In some embodiments of this application, the pulper mounting frame 412 is further provided with linear slide rails 4124, positioning pins 4125, and ground drain pipes 4126 to improve maintenance convenience and drainage efficiency. The linear slide rails 4124 are installed between the equipment frame 600 and the bottom surface of the pulper mounting frame 412, achieving a sliding connection between the two through multiple sets of linear slide rails 4124. They support the frame and can be pulled outwards to form a drawer-type structure for easy maintenance. The positioning pins 4125 are activated when the pulper mounting frame 412 is reset. The frame is fixed to the equipment frame 600 by two tapered pins on the front and one tapered pin on each side (a total of four tapered pins), ensuring accurate positioning after reset. The ground drain pipes 4126 are placed at the bottom or side of the equipment frame 600 and connected to a drainage pump to assist in draining accumulated water from inside the frame.

[0062] These three components work together to achieve external pull-out maintenance, precise repositioning, and auxiliary drainage. The linear guide rail 4124 guides the refining machine mounting frame 412 to be pulled outwards, while the ground drain pipe 4126, combined with a drainage pump, actively removes accumulated water. This design solves the problems of traditional fixed refining machines, such as requiring bending over for maintenance, unstable positioning, and slow water drainage due to reliance on the floor drain 4122 for natural flow. It forms a drawer-style external pull-out structure based on the fixed frame of the aforementioned embodiment, adapting to different maintenance needs.

[0063] The pull-out drawer structure of this embodiment makes maintenance of the grinder 411 more convenient. After the grinder mounting frame 412 is pulled out, personnel can operate the soybean residue processing, cleaning, and inspection at close range without having to bend over significantly. Simultaneously, precise positioning is ensured; the four tapered pins guarantee that after resetting, the grinder mounting frame 412 is aligned with the equipment frame 600. A drainage pump actively pumps out accumulated water via the ground drain pipe 4126, reducing residue and improving drainage efficiency. It retains the stability of the fixed frame while adding the pull-out function.

[0064] During overall use, when maintenance of the refiner 411 is required, the positioning pin 4125 is released and the refiner mounting frame 412 is pulled outward along the linear slide rail 4124. After the operation is completed, it is pushed back and fixed with the pin. During cleaning, the drainage pump pumps out the water accumulated inside the refiner mounting frame 412 through the ground drainage pipe 4126. This process achieves convenient maintenance, precise positioning, and efficient drainage.

[0065] In some embodiments of this application, the soybean grinding system 400 also includes an auxiliary and cleaning system 420, which is installed in the grinding machine mounting frame 412 and consists of a secondary grinding kit 421, an internal cleaning system 422, and a cleaning inspection system. It is integrated into the grinding machine mounting frame 412 and set around the grinding machine 411 to form an auxiliary cleaning system for soybean residue utilization, automatic cleaning, and visual inspection.

[0066] The secondary grinding kit 421 includes a micro gear pump, a handheld electric mixer, and two soybean residue slurry containers. The micro gear pump and handheld electric mixer are installed inside the grinder mounting frame 412 near the residue outlet of the grinder 411. The two containers are placed inside the equipment frame 600, respectively receiving soybean residue from the primary grinding and secondary grinding. The function of the secondary grinding kit 421 is to use the micro gear pump to extract the mixture of primary grinding soybean residue and water, stir it into a viscous slurry mixture using the handheld electric mixer, and then perform secondary grinding to improve the soybean protein extraction rate.

[0067] The internal cleaning system 422 includes a multi-point water spray device, which is detachably installed on the top cover, cavity and soybean residue discharge guide plate of the grinder 411. It is connected to the water tank 261 of the water and air supply unit 260 through a water pipe. It is used to spray water to clean the top cover, cavity and guide plate of the grinder 411 to remove residual soybean residue. The wastewater flows to the floor drain 4122 through the drainage slope composite bottom plate 4121.

[0068] The multi-point water spray device is installed in a quick-release manner. It can be removed during the grinding process, and the holes are sealed with screw caps or sliding plates. It can be reinserted when cleaning. The multi-point water spray device cleans by spraying water, covering the inner wall of the grinder 411 with a 360-degree spray area, ensuring that all parts in contact with soybean milk and soybean residue are fully wetted and rinsed by the high-pressure water flow. The cleaning process is controlled by the control system to start and stop, while the grinder 411 runs idle, driving the water flow to rotate and clean. No manual intervention is required. Wastewater is collected on the inclined slope of the drainage slope composite base plate 4121 and flows out into the floor drain 4122.

[0069] The cleaning inspection system includes an inspection port, a flexible rod, an illumination camera, and a display screen. The inspection port is located on the top cover of the refiner 411. One end of the flexible rod is fixed to the illumination camera, which is inserted into the cavity through the inspection port. The display screen is mounted on the equipment frame 600 and connected to the camera signal to collect images of the cavity cleaning effect and display them on the screen, enabling inspection without disassembly.

[0070] In this embodiment, the soybean residue after the first grinding is further ground by the secondary grinding kit 421, improving the soybean milk extraction rate and quality, and making the soybean milk finer. After shutdown, the internal cleaning system 422 sprays water for cleaning, which is automatic and requires no disassembly, reducing labor. After cleaning, the cleaning inspection system uses a camera to capture images and displays the results on the screen. The structure is integrated into the grinding machine mounting frame 412 without occupying additional space. The process integrates soybean residue utilization, automatic cleaning, and inspection without disassembly, solving the problems of cumbersome cleaning and disassembly and inefficient inspection in traditional equipment, and improving automation and maintenance convenience.

[0071] In some embodiments of this application, reference is made to Figures 10-11 As shown, the equipment also includes a grinding and feeding system 300, located directly below the soybean soaking system 200 and directly above the soybean grinding system 400. It is fixed by the multi-layer partition plates of the equipment frame 600 and consists of a slide rail 310, a box 320, a screw conveyor 330 and a geared motor 340.

[0072] The slide rail 310 is a drawer-type structure, installed on the equipment frame 600, supporting the pull-out of the box 320 for easy cleaning of unprocessed soybeans. The box 320 is a rectangular stainless steel box with an open top, embedded in the equipment frame 600 via the slide rail 310. Its opening is located directly below the special soybean soaking tank 210 of the soybean soaking system 200, receiving the soybean and water mixture discharged from the bottom discharge valve 220, and temporarily storing the soybeans and water.

[0073] The screw conveyor 330 is a horizontal auger screw conveyor installed on the bottom surface of the box 320, with its output end facing the feed hopper of the grinder 411 in the soybean grinding system 400. It is driven by a geared motor 340 to push soybeans into the box 320 at a uniform speed. The geared motor 340 is a low-speed small geared motor, fixed on the outside of the box 320, and its output shaft is connected to the screw conveyor 330 through a flexible coupling to ensure that the soybeans fall at a uniform and slow speed, avoiding pressure fluctuations in the grinder 411.

[0074] Horizontal screw conveyors typically consist of a screw shaft and blades. The screw shaft possesses high strength and wear resistance, enabling it to maintain stable operation during long-term conveying. The blades have a continuous spiral structure, and their pitch design ensures that soybeans advance evenly during conveying, preventing accumulation or blockage. Driven by a geared motor 340, the screw conveyor 330 achieves continuous and stable conveying of soybeans, providing uniform feeding to the soybean grinding system 400, thus improving grinding efficiency and soybean milk quality.

[0075] The pulping feed system 300 is embedded in the equipment frame 600 via the slide rail 310, forming a pre-treatment process of receiving, temporarily storing, and quantitatively conveying, providing a stable feed for the pulping mill 411. This avoids problems such as hopper bursting, blockage, and uneven pulping caused by the foamed mixture falling directly into the pulping mill 411, as well as the reliance on experience for frequent manual adjustments to the water flow and stirring rhythm.

[0076] During overall use, the soaked mixture falls into the container 320 through the discharge pipe 221 for temporary storage. After the water is partially discharged, the geared motor 340 drives the screw conveyor 330 to push the soybeans at a uniform speed to the feed hopper of the grinder 411. When cleaning is required, the container 320 is pulled out along the slide rail 310, and the unprocessed soybeans are picked up through the front side flap. This process achieves buffering, quantitative, and fine grinding. The uniform pushing speed of the screw conveyor 330, combined with the stable water flow of the grinder 411, achieves fine grinding and reduces soybean residue particles. At the same time, it can prevent clogging and overflow. The temporary storage in the container 320 and the quantity control by the screw conveyor 330 prevent the hopper from overloading. The operation process can reduce manual intervention and does not require frequent adjustments to the equipment rhythm.

[0077] Understandably, the 300 grinding feed system is an optional structure and a non-essential component. Without it, the process is simple and equipment costs are effectively reduced. After installation, it can improve grinding quality and adapt to different practical needs.

[0078] In some embodiments of this application, the bottom surface of the box 320 of the grinding and feeding system 300 has a slope of about 2% and is inclined towards the elongated discharge port. Gravity is used to make the temporarily stored soybeans gather towards the discharge port to avoid local accumulation. An adjustable hopper door 350 is provided at the elongated discharge port. It is a movable elongated metal plate with a handle. The size of the exposed hole can be adjusted by pulling the handle. It works with the screw conveyor 330 to control the number of soybeans falling per unit time to achieve quantitative feeding.

[0079] A drain plate 380 with densely pores is provided on one side of the container 320 to allow some of the water from soaking the soybeans to drain out. A drain pipe 360, which is an arc-shaped pipe, is welded to the side wall near the drain plate 380 and connects to an external drainage structure, such as the drain drain 4122 of the equipment frame 600, to collect the drained water and guide it to the outside, reducing the amount of water entering the grinder 411. A side flap 370 is provided on the front of the container 320, which is connected to the container 320 by hinges or buckles and can be opened outwards to remove unprocessed soybeans from the container 320, facilitating refrigeration when grinding is paused.

[0080] Among them, the adjustable hopper door 350 works with the screw conveyor 330 to control the feeding speed, the drainage plate 380 and the drainage pipe 360 ​​separate some of the soaking water during the temporary storage stage to improve the stability of the grinding concentration, and the side flip plate 370 provides a manual bean retrieval channel without disassembling parts.

[0081] When in use, after the soaking mixture falls into the box 320, the water is discharged through the drain plate 380 and the drain pipe 360. The soybeans gather towards the discharge port under the action of the slope. The operator pulls the adjustable hopper door 350 to adjust the opening. The geared motor 340 drives the screw conveyor 330 to push the soybeans to the grinder 411. When it is necessary to remove the remaining soybeans, the side flap 370 can be opened to pick them up directly.

[0082] In this embodiment, the feeding speed of the grinding and feeding system 300 is controllable. Manual fine-tuning via the adjustable hopper door 350, combined with the uniform pushing speed of the screw conveyor 330, ensures fine grinding by the grinder 411. The drainage load on the grinder 411 is reduced and drainage efficiency improved by separating water through the drainage plate 380 and drainage pipe 360. The side-flipping plate 370 allows for direct removal of beans, preventing the accumulation of residual material. The grinding and feeding system 300 achieves optimized buffering and quantitative feeding, improving the quality of grinding and pretreatment and ease of operation. Furthermore, it boasts a high degree of structural integration; the drainage plate 380, drainage pipe 360, and side-flipping plate 370 are all integrated into the housing 320, without occupying additional space in the equipment frame 600.

[0083] In some embodiments of this application, reference is made to Figures 12-13 As shown, the preparation system 500 includes a stirring device 510 and a cooking and brine-adding execution component 520, located on the side of the equipment frame 600 away from the raw material storage system 100, adjacent to the soybean milk grinding system 400, and receiving initial soybean milk through a pipe.

[0084] The stirring paddle assembly 511 of the stirring device 510 is located at the center of the cooking tank 521 of the cooking and coagulation execution unit 520. It consists of a vertical hexagonal shaft, a horizontal rod and a single blade. It is driven by a horizontal rotation drive platform 512 and a vertical lifting drive group 513. It rotates and lifts within the cooking tank 521 to stir the soy milk to prevent it from sticking to the pot during cooking, to mix the coagulant and soy milk evenly during coagulation, and to stir the tofu pudding into small pieces during coagulation.

[0085] The cooking tank 521 of the cooking and coagulation unit 520 is a stainless steel tank, placed on the equipment frame 600, to hold the initial soy milk for heating, cooking, and coagulation into tofu pudding. The electronic scale 522 is a heat-insulated electronic scale with an LCD screen, installed below the cooking tank 521. It displays the weight of the soy milk in the tank via a tare function, assisting in controlling the amount of water added. A heating source is used to heat the liquid inside the cooking tank 521, providing heat for cooking the soy milk. The heating source can be an induction cooker or a steam generator 525. The steam generator 525 can also provide 60℃ constant-temperature hot water and is connected to the internal cleaning system 422 for cleaning the grinder 411.

[0086] The coagulant addition device 523 contains three coagulant boxes, containing magnesium chloride brine, gypsum emulsion, and defoamer, respectively. It is installed at the top of the equipment frame 600 near the cooking tank 521. A downward-facing metal tube is located at the bottom of each box, and an electric ball valve is mounted on the tube. The lower end of the electric ball valve is connected to a stainless steel capillary tube, the lower end of which faces the cooking tank 521. A miniature flow manual regulating valve is installed on the capillary tube for quantitatively adding the coagulant to the cooking tank. The sensor group includes an infrared temperature sensor and a distance sensor, installed on the wall of the cooking tank 521, to monitor the temperature and level of the soy milk inside the tank, providing feedback signals to the control system.

[0087] When the preparation system 500 is running, the initial soy milk flows into the cooking tank 521 through a pipe. The heating source is activated, and the stirring paddle assembly 511 stirs the soy milk with a combination of horizontal rotation and vertical lifting motion. The infrared temperature sensor in the sensor group monitors the temperature, and heating stops once the cooking temperature is reached. During coagulation, the soy milk cools to the coagulation temperature, the stirring paddle assembly 511 continues to move, the electric ball valve of the coagulation agent addition device 523 opens, and the coagulation agent flows quantitatively into the cooking tank through a metal tube and a stainless steel capillary tube. The distance sensor in the sensor group monitors the liquid level, and the electronic scale 522 displays the weight to ensure an accurate ratio of coagulation agent to soy milk. After the soy milk coagulates into tofu pudding, the stirring paddle assembly 511 rotates rapidly and lifts slightly in a coagulation breaking mode to break the tofu pudding into small pieces.

[0088] This embodiment solves the problems of traditional boiling methods, such as easy burning of the pot due to single stirring, uneven mixing of the coagulant, inaccurate dosage of coagulant by manual pouring, and large errors in temperature and liquid level observation. The composite motion of the stirring paddle assembly 511 achieves thorough stirring without dead zones. The electric ball valve and manual regulating valve of the coagulant addition device 523, in conjunction with the electronic scale 522, precisely control the amount of coagulant added, ensuring uniform and consistent coagulant addition. Quantitative addition and sensor monitoring ensure thorough mixing of the coagulant, resulting in a uniform texture of the tofu pudding. Simultaneously, automated status monitoring reduces reliance on manual labor. Real-time data feedback from the sensor group and electronic scale 522 reduces errors, improving the quality of the tofu pudding and increasing the level of automation.

[0089] In some embodiments of this application, the stirring device 510 includes a horizontal rotation drive platform 512, a vertical lifting drive group 513, and a stirring paddle assembly 511, which are connected to form a composite motion drive structure for stirring soy milk, coagulant, or tofu pudding in the cooking tank 521 of the preparation system 500.

[0090] The stirring paddle assembly 511 includes a vertical hexagonal shaft, a horizontal rod, and a single blade. The upper part of the vertical hexagonal shaft is connected to a nut or cylinder via a threaded connection, and the lower part is welded to the horizontal rod. A single blade is welded to the other side of the horizontal rod. The single blade is a thin square sheet of stainless steel, with its edge maintaining a distance from the inner wall of the cooking tank 521. The function of the stirring paddle assembly 511 is to transmit power and achieve stirring through the horizontal rod and the single blade. The hexagonal structure ensures alignment (0.1-0.2mm gap) when connected to the drive platform and lifting assembly, preventing wobbling.

[0091] The horizontal rotation drive platform 512 is positioned above the stirring paddle assembly 511. Its lower part is connected to the hexagonal shaft through a matching sleeve with a hexagonal inner hole. The platform is equipped with a reducer, such as a planetary reducer or a worm gear reducer. The function of the horizontal rotation drive platform 512 is to reduce the rotation speed and drive the hexagonal shaft to rotate horizontally, thereby achieving horizontal mixing of the soy milk.

[0092] The vertical lifting drive unit 513 is connected to the hexagonal shaft, which drives it to move up and down. It can be selected from one of the following: ball screw guide rail, cylinder piston rod, gear rack or synchronous belt (ball screw + guide rail is recommended). Its function is to drive the hexagonal shaft to reciprocate, which, together with the horizontal rotation, forms a compound stirring to expand the range.

[0093] The dual-state connector is a hidden structure of the horizontal rotary drive platform 512, used to connect the horizontal rotation and vertical lifting components. It supports the weight of the stirring rod through a bearing assembly, achieving a guiding function of lower rotation and upper fixation, thus solving the problem of lateral swaying of the hexagonal rod. The horizontal rotary drive platform 512 and the vertical lifting drive assembly 513 are connected to the hexagonal shaft of the stirring paddle assembly 511 via the dual-state connector. The upper part of the hexagonal shaft is slidably connected to the lifting assembly, while the lower transverse rod works in conjunction with the paddle blades to ensure thorough stirring without dead zones.

[0094] This embodiment avoids dead zones in the corners of the cooking tank 521 caused by single horizontal rotation or vertical lifting, preventing problems such as scorching, uneven mixing, or incomplete destruction. The guiding design of the hexagonal shaft and the dual-state dynamic-static connector improves motion stability and reduces the impact of shaking on stirring accuracy. The horizontal rotation and vertical lifting drives are integrated into the stirring device 510, without occupying additional space in the equipment frame 600, conforming to miniaturization design; the various options of the vertical lifting drive assembly 513 adapt to different durability requirements. In overall use, the stirring paddle assembly 511 performs a spiral compound motion within the cooking tank 521, covering all areas, improving stirring quality and equipment stability.

[0095] In some embodiments of this application, the device also includes a control system, consisting of a centralized touch screen, independent start / stop buttons, and a main device controller, used to realize automated and semi-automated control of each section.

[0096] A central touchscreen is located on the side of the equipment and is connected to various components via cables. It displays the weight values ​​of each section, such as those of weighing scales 111 and 522, images captured by the cleaning inspection system camera, operating parameters such as feeding amount and soaking time, and alarm information. It also provides a fully automatic and semi-automatic mode selection interface and supports setting operating parameters.

[0097] Independent start / stop buttons are located next to each section to enable segmented control and accommodate manual segmented operation habits. The main controller is integrated into the equipment frame 600 and is connected via cable to a centralized touch screen, independent start / stop buttons, the vortex blower 121 of the vacuum feeder 120, the low-speed motor 231 and electric ball valve of the soybean soaking system 200, the horizontal rotation drive platform 512 and vertical lifting drive group 513 of the stirring device 510, and the electrically controlled ball valve of the brine additive addition device 523. It also receives feedback signals from various components such as material level sensors, switch feedback, temperature and liquid level signals.

[0098] The main controller of the equipment, acting as the control component, can send commands based on parameters set on the centralized touchscreen in fully automatic mode. These commands include starting the vortex blower 121 to suck up beans at the specified feed rate, controlling the low-speed motor 231 and electric ball valve to complete soaking and water exchange, instructing the grinder 411 to grind at the specified speed, operating the auxiliary and cleaning system 420, and regulating the heating source of the preparation system 500, the compound stirring of the stirring device 510, and the addition of the brine additive device 523 according to the specified dosage. It also receives feedback signals, such as the material level sensor indicating fullness, the opening and closing status of the electric ball valve, the temperature from the infrared temperature sensor, and the liquid level from the distance sensor, dynamically adjusting operating parameters. In semi-automatic mode, the main controller receives independent button commands to start and stop corresponding sections, adapting to segmented operation requirements.

[0099] The control system of this application uses a centralized touchscreen and independent buttons as the human-machine interface. The main controller of the equipment processes commands and controls various components, forming a stable control system. Its operational flexibility is reflected in the fully automatic mode, suitable for standardized production, and the semi-automatic mode, adaptable to segmented operation habits. Parameterized settings and closed-loop feedback reduce human error and improve operational stability. The centralized touchscreen displays the status of multiple work sections and alarms in real time, improving management efficiency. Overall, it realizes dual-mode control, parameterized operation, and centralized monitoring, improving the ease of use and stability of the equipment.

[0100] Based on the above embodiments, the overall usage process of the integrated small-scale soy milk and tofu pudding processing equipment provided in this application is as follows: ① Raw material storage and quantitative feeding: Dried soybeans are stored in soybean storage bins 110 of the raw material storage system 100, and the initial weight is displayed on the weighing electronic scale 111. The vortex blower 121 of the vacuum suction machine 120 is started, and the negative pressure is used to suck the soybeans into the feeding bin 122 (fixed volume) through the negative pressure pipe 123. After the material level sensor detects that the bin is full, the blower stops, and the counterweight flap valve opens under the action of gravity, and the soybeans fall into the special soybean soaking bin 210 of the soybean soaking system 200.

[0101] ② Soybean soaking and discharge: Soybeans are automatically soaked in water in a special soybean soaking tank 210, with the water changed twice at regular intervals (to remove the beany smell). After soaking, the low-speed motor 231 of the stirring device 230 is started, and the rotating shaft 232 stirs the soybeans. The annular air injection pipe 241 of the aeration system 240 is injected with air through the air compressor 263, and the annular water injection pipe 251 of the high-pressure water injection system 250 is injected with water through the variable frequency booster pump 262. The ball valve 222 of the bottom discharge valve 220 is opened, and the soybean and water mixture flows into the box 320 of the grinding feed system 300 through the large-diameter discharge pipe 221 under the action of gas-liquid mixing.

[0102] ③ Pre-treatment and grinding: The container 320 receives the mixture, and water is discharged through the drainage plate 380 and drainage pipe 360. Soybeans gather towards the elongated discharge port due to the slope of the bottom surface. The geared motor 340 drives the screw conveyor 330 to rotate at a uniform speed. The operator pulls the adjustable hopper door 350 to adjust the size of the discharge port. Soybeans are quantitatively fed into the grinder 411 of the soybean milk grinding system 400, where they are ground into initial soybean milk. The soybean residue is separated, and the residue can be ground a second time by the secondary grinding kit 421.

[0103] ④ Preparation and Finished Product Output: Initial soy milk flows through pipes into the cooking tank 521 of the preparation system 500. An electronic scale 522 displays the weight, the heating source is activated, and the stirring paddle assembly 511 of the stirring device 510, driven by a horizontal rotation drive platform 512 and a vertical lifting drive group 513, performs compound stirring to prevent scorching. After cooking, the electric ball valve of the coagulation agent addition device 523 quantitatively adds magnesium chloride brine / gypsum emulsion / defoamer. A sensor group monitors the temperature and liquid level, and the electronic scale 522 assists in quantity control. The soy milk coagulates into tofu pudding. During the coagulation stage, the stirring paddle assembly 511 stirs the soy milk into smaller pieces in a "coagulation" mode, completing the processing.

[0104] ⑤ Cleaning and maintenance: The grinder 411 is automatically cleaned by the multi-point water spray device of the internal cleaning system 422, and the camera + display screen of the cleaning inspection system can be inspected without disassembly; each system drains water according to the program, the box 320 of the grinding feed system 300 can be pulled out along the slide rail 310, and the side flip plate 370 takes out beans; the control system starts and stops each section through a centralized touch screen or independent buttons to achieve semi-automatic / fully automatic cleaning.

[0105] As can be seen from the above, the integrated small-scale soybean milk and tofu pudding processing equipment provided in this application integrates five major systems—raw material storage system, soybean soaking system, grinding and feeding system, soybean milk grinding system, and preparation system—through the multi-layer vertical layout of the equipment frame. The materials flow from top to bottom by gravity, eliminating long-distance conveying mechanisms. It is suitable for environments with limited space, such as restaurants and canteens. The equipment volume is smaller than that of traditional decentralized equipment, achieving a high degree of integration and miniaturization.

[0106] The control system includes a centralized touchscreen, independent start / stop buttons, and the main equipment controller, providing fully automatic and semi-automatic dual-mode control to adapt to different operating habits. In fully automatic mode, parameters are set via the centralized touchscreen, and the main equipment controller provides closed-loop control of each component. In semi-automatic mode, operation is performed in segments via independent buttons. Each system offers optional configurations, such as composite bottom heating or heating pipes for the soybean soaking system, fixed or pull-out drawer-type mounting frames for the grinder, and ball screws or cylinders for the vertical lifting drive assembly of the stirring device, adapting to different needs and achieving a balance between automation and flexibility.

[0107] Improved processing quality and efficiency are reflected in the synergistic effect of various systems. The soybean soaking system's steeply sloping conical bottom for the soaking soybeans, the rotating shaft of the stirring device, the annular air injection pipe of the aeration system, and the annular water injection pipe of the high-pressure water injection system form a three-way mechanism, resolving discharge blockages and ensuring complete entry of soybeans into the grinder. Composite bottom heating or heating pipes shorten soaking time in winter, increasing daily equipment utilization. The grinding feed system's buffer box for temporary storage and the screw conveyor for quantitative feeding, combined with the soybean grinding system's pulp-residue separation and auxiliary and cleaning system's secondary grinding kit, achieves fine grinding, improving protein extraction rate and soybean milk smoothness. The preparation system's stirring device for composite stirring, the coagulant addition device for quantitative addition, and the sensor group for monitoring ensure that the boiling process doesn't burn, coagulation is uniform, and the tofu texture is consistent.

[0108] Easy operation and simple maintenance are achieved through multi-structure design. The weighing scale accurately controls weight; the cleaning and inspection system allows for inspection without disassembly, and the internal cleaning system automatically cleans; the grinding and feeding system features a drawer-type slide rail and a side-flip plate for picking up beans, and the grinding machine's mounting frame has an external drawer design that reduces manual bending and disassembly, conforming to ergonomics.

[0109] In terms of structural reliability and cost control, food-contact parts are made of stainless steel, and the oil-free silent air compressor and variable frequency booster pump of the water and air supply unit ensure stable operation; optional configurations such as the grinding feed system and the foaming tank heating allow users to choose according to their needs, balancing performance and cost.

[0110] During operation, the air compressor and variable frequency booster pump of the water and air supply unit start during discharge. High-pressure air is blown obliquely through the small holes of the annular air injection pipe of the aeration system, and high-pressure water is injected obliquely through the small holes of the annular water injection pipe of the high-pressure water injection system. The gas-liquid mixture suspends and flows the soybeans, and the mixture is discharged to the soybean grinding system, achieving high-efficiency discharge without clogging. This solves the problem of incomplete discharge caused by easy clogging of traditional pipes. The structure is simple and adaptable to the needs of equipment miniaturization. In summary, this solution realizes integrated processing from dry soybeans to tofu pudding through gravity flow, vertical integration, dual-mode control, and optional configuration. It features a compact structure, high degree of automation, stable processing quality, and convenient operation and maintenance. It solves the problems of large space, scattered processes, high dependence on manual labor, and large quality fluctuations of traditional equipment, and is suitable for high-frequency quantitative catering production.

[0111] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the disclosure in the specification and the embodiments. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein.

Claims

1. An integrated small-scale soy milk and tofu processing equipment, characterized in that, include: Raw material storage system (100), soybean soaking system (200), soybean milk grinding system (400), preparation system (500) and equipment frame (600). The equipment frame (600) is a stainless steel metal frame supported at four corners and placed on the ground. Inside, the raw material storage system (100), soybean soaking system (200), soybean milk grinding system (400) and preparation system (500) are arranged vertically in layers through multiple partition plates. The raw material storage system (100), soybean soaking system (200), soybean milk grinding system (400) and preparation system (500) are connected by pipelines. The raw material storage system (100) is located on one side of the equipment frame (600) and is used to store dried soybeans; a vacuum feeder (120) is installed on the upper layer of the equipment frame (600), and the vacuum feeder (120) is used to transport a certain amount of dried soybeans in the raw material storage system (100) to the special bucket (210) for soaking soybeans in the soybean soaking system (200). The soybean soaking system (200) is located directly below the raw material storage system (100) and is used to soak dried soybeans and change the water at regular intervals. The bottom of the soybean soaking system (200) is equipped with a discharge valve (220) to discharge the soaked soybean and water mixture to the soybean milk grinding system (400) located directly below the soybean soaking system (200). The soybean grinding system (400) is located directly below the soybean soaking system (200), receives the soaked soybeans, grinds them to form initial soybean milk and separates the soybean residue, and transports the initial soybean milk to the preparation system (500). The preparation system (500) is located on the other side of the equipment frame (600), receives the initial soy milk through pipelines, performs heating and cooking treatment on the initial soy milk to obtain soy milk, or performs coagulation treatment to make tofu pudding.

2. The integrated small-scale soy milk and tofu processing equipment according to claim 1, characterized in that, The raw material storage system (100) includes a soybean storage tank (110) and a vacuum feeder (120). The soybean storage hopper (110) is a 304 stainless steel storage box, installed on one side of the equipment frame (600), and a weighing electronic scale (111) is provided at its lower part. The vacuum feeder (120) includes a vortex blower (121), a feeding hopper (122), and a negative pressure pipeline (123). One end of the negative pressure pipe (123) is connected to the outlet of the soybean storage hopper (110), and the other end is connected to the inlet of the feeding hopper (122); The vortex blower (121) is located on one side of the soybean storage hopper (110) and is connected to the top of the feeding hopper (122) via a pipeline. The vortex blower (121) is used to generate negative pressure to suck soybeans from the soybean storage hopper (110) into the feeding hopper (122). The feeding hopper (122) is a fixed volume hopper, and a counterweight flap valve is provided at the bottom; The counterweight flap valve is connected to the opening of the lid of the soybean soaking system (200).

3. The integrated small-scale soy milk and tofu processing equipment according to claim 1, characterized in that, The soybean soaking system (200) includes a special tank (210) for soaking soybeans, a bottom discharge valve (220), a stirring device (230), an aeration system (240), a high-pressure water injection system (250), a water and air supply unit (260), and a drainage system (270). The special bucket (210) for soaking soybeans is made of 304 stainless steel and has a conical bottom with a taper of 30°-50°. The bottom discharge valve (220) is located at the lowest point of the bottom of the special bucket (210) for soaking soybeans, and includes a discharge pipe (221) and a ball valve (222). The ball valve (222) is installed inside the discharge pipe (221). One end of the discharge pipe (221) is connected to the bottom of the special bucket (210) for soaking soybeans, and the other end is connected to the soybean grinding system (400). The bucket (210) for soaking soybeans has a flip-top opening (211) on its lid. The stirring device (230) is installed on the outside of the flip-top opening (211). The stirring device (230) includes a low-speed motor (231) and a rotating shaft (232). The low-speed motor (231) is connected to the rotating shaft (232) through a reducer. The rotating shaft (232) extends into the special bucket (210) for soaking soybeans to the upper end of the diameter of the bottom discharge valve (220). The rotating shaft (232) includes a straight section and an arc section. The straight section is close to the low-speed motor (231) and the bottom discharge valve (220), and the arc section is located in the middle section of the rotating shaft (232). The water and gas supply unit (260) includes a water tank (261), a variable frequency booster pump (262), and an air compressor (263). The aeration system (240) is located at the bottom of the special bucket (210) for soaking soybeans and is connected to an air compressor (263) to inject air into the special bucket (210) for soaking soybeans; The high-pressure water injection system (250) is installed on the top of the special bucket (210) for soaking soybeans and is connected to the water tank (261) and the variable frequency booster pump (262) to inject water into the special bucket (210) for soaking soybeans; The drainage system (270) includes an electric drain valve and a drain pipe. The drain pipe is connected to the bottom of the special bucket (210) for soaking soybeans. A nut is fixed to one end of the drain pipe inside the special bucket (210). The surface of the nut is provided with fine holes for draining water to the outside. The drain pipe is controlled to drain water through the electric drain valve.

4. The integrated small-scale soy milk and tofu processing equipment according to claim 3, characterized in that, The aeration system (240) includes an annular air injection pipe (241). The annular air injection pipe (241) is located at the bottom of the special bucket (210) for soaking soybeans. One end of the annular air injection pipe (241) is a closed end, and the pipe wall is provided with a number of evenly distributed 1mm-1.5mm holes. The other end of the annular air injection pipe (241) is connected to the air compressor (263) through an air pump pipe. The high-pressure water injection system (250) includes an annular water injection pipe (251); The annular water injection pipe (251) is located at the top of the special bucket (210) for soaking soybeans. One end of the annular pipe (251) is a closed end, and the pipe wall is provided with a number of evenly distributed 1mm-1.5mm holes. The other end of the annular water injection pipe (251) is connected to the water tank (261) and the variable frequency booster pump (262) through a water pipe.

5. The integrated small-scale soy milk and tofu processing equipment according to claim 1, characterized in that, The soybean milk grinding system (400) includes a main grinding machine system (410). The main system of the pulper (410) includes a pulper (411) and a pulper mounting frame (412). The grinding machine (411) is a pulp-residue separation grinding machine. The feed hopper of the grinding machine (411) is located at the lower end of the discharge pipe (221) and is used to grind the soaked soybeans into soy milk and separate the soybean residue. The pulper mounting frame (412) is used to fix the pulper (411). The grinding machine mounting frame (412) is equipped with a drainage slope composite base plate (4121), a floor drain (4122) and a detachable water baffle (4123). The drainage slope composite base plate (4121) has a slope and faces the drain (4122). The drain (4122) is located at the lowest point of the drainage slope composite base plate (4121). The detachable water baffle (4123) is a movable metal semi-enclosed strip plate, which is installed through a metal column slot and has a rubber sealing strip.

6. The integrated small-scale soy milk and tofu processing equipment according to claim 5, characterized in that, The grinding machine mounting frame (412) is also equipped with a linear slide rail (4124), a positioning pin (4125), and a ground drainage pipe (4126). The linear slide rail (4124) is installed between the bottom surface of the equipment frame (600) and the pulper mounting frame (412); When the refining machine mounting frame (4122) is reset, the positioning pin (4125) is fixed by the tapered pin positioning platform (4127) on both sides; The ground drainage pipe (4126) is placed at the bottom or side of the equipment frame (600) and connected to the drainage pump.

7. The integrated small-scale soy milk and tofu processing equipment according to claim 5 or 6, characterized in that, The soybean grinding system (400) also includes: an auxiliary and cleaning system (420). The auxiliary and cleaning system (420) includes a secondary grinding kit (421), an internal cleaning system (422), and a cleaning inspection system; The secondary grinding kit (421) includes a micro gear pump, a handheld electric mixer, and two soybean residue slurry containers. The micro gear pump and handheld electric mixer are installed within the grinding machine mounting frame (412) for drawing soybean residue slurry and mixing the soybean residue and water mixture; The two soybean residue slurry containers are used to receive soybean residue from primary grinding and soybean residue from secondary grinding, respectively. The internal cleaning system (422) includes a multi-point water spray device, which is detachably installed on the top cover, cavity and soybean residue discharge guide plate of the grinder (411) for cleaning the inside of the grinder (411) to remove soybean residue. The cleaning inspection system includes an inspection port, a flexible rod, an illuminated camera, and a display screen; The inspection port is located on the top cover of the pulper (411). One end of the flexible rod is fixed to the lighting camera, which is inserted into the cavity of the pulper (411) through the inspection port. The camera captures images of the cleaning effect and displays them on the display screen.

8. The integrated small-scale soy milk and tofu processing equipment according to claim 1, characterized in that, Also includes: Pulping feed system (300); The grinding and feeding system (300) is located directly below the soybean soaking system (200) and directly above the soybean grinding system (400), and is used to receive and temporarily store the soybean and water mixture discharged from the soybean soaking system (200); The pulp feeding system (300) includes a slide rail (310), a housing (320), a screw conveyor (330), and a geared motor (340). The slide rail (310) is a drawer-type structure and is installed on the equipment frame (600) to support the box (320) to achieve drawer-type pull-out; The box (320) is a rectangular box with an open top, which is embedded in the equipment frame (600) through the slide rail (310). Its opening is located directly below the special bucket (210) for soaking soybeans in the soybean soaking system (200), and is used to receive the mixture of soybeans and water discharged from the bottom discharge valve (220) of the special bucket (210) for soaking soybeans. The geared motor (340) is a low-speed small geared motor, which is fixed on the outside of the box (320). The output shaft of the geared motor (340) is connected to the screw conveyor (330). The screw conveyor (330) is a horizontal auger screw conveyor and is installed on the bottom surface of the box (320). It is driven by the geared motor (340), and the output end of the screw conveyor (330) faces the feed hopper of the soybean milk grinding system (400).

9. The integrated small-scale soy milk and tofu processing equipment according to claim 8, characterized in that, The bottom surface of the box (320) of the grinding feed system (300) is sloped and has a long strip discharge port. The long strip discharge port is provided with an adjustable chamber door (350), which is a movable long strip metal plate with a handle. The box body (320) has a drainage plate (380) with dense holes on one side. A drainage pipe (360) is welded to the side wall of the box body (320) near the drainage plate (380). The drainage pipe (360) is connected to the external drainage structure. A side flap (370) is provided on the front of the box (320) for removing unprocessed soybeans from the box (320).

10. The integrated small-scale soy milk and tofu processing equipment according to claim 1, characterized in that, The preparation system (500) includes a stirring device (510) and a cooking and brine-addition execution component (520). The stirring device (510) includes a stirring paddle assembly (511); The cooking and brine-adding execution component (520) includes a cooking tank (521), an electronic scale (522), a heating source, a brine-adding device (523), and a sensor group; The stirring paddle assembly (511) is located at the center of the cooking tank (521) and is used to stir within the cooking tank (521). The heating source is used to heat the liquid in the cooking tank (521). The heating source is an induction cooker or a steam generator (525). The steam generator (525) provides high-pressure steam and constant-temperature hot water. The electronic scale (522) is a heat-insulated electronic scale with an LCD screen, installed below the steaming barrel (521), and is used to display the weight of the soy milk in the steaming barrel (521). The brine additive device (523) contains three brine additive boxes, which are respectively filled with magnesium chloride brine, gypsum emulsion and defoamer; The bottom of the halogenation agent box is provided with a downward-facing metal tube and an electric ball valve is installed. The lower end of the electric ball valve is connected to a stainless steel capillary tube, and the lower end of the stainless steel capillary tube faces the cooking tank (521). The stainless steel capillary tube is equipped with a micro flow manual regulating valve for quantitatively adding magnesium chloride brine, gypsum emulsion and defoamer to the cooking tank (521); The sensor group includes an infrared temperature sensor and a distance sensor. The infrared temperature sensor is used to monitor the temperature of the soy milk in the steaming pot (521), and the distance sensor is used to monitor the liquid level of the soy milk in the steaming pot (521).

11. The integrated small-scale soy milk and tofu processing equipment according to claim 10, characterized in that, The stirring device (510) also includes a horizontal rotation drive platform (512) and a vertical lifting drive group (513). The stirring paddle assembly (511) includes a vertical hexagonal shaft, a horizontal rod, and a single blade; The upper part of the vertical hexagonal shaft is connected to a nut or cylinder with a threaded connection, and the lower part is welded with a horizontal rod. The other side of the horizontal rod is welded with the single blade. The single blade is a stainless steel square sheet plate. The edge of the single blade has a gap with the inner wall of the cooking tank (521). The horizontal rotation drive platform (512) is located above the stirring paddle assembly (511). The lower part of the horizontal rotation drive platform (512) is connected to the hexagonal shaft through a matching sleeve with a hexagonal inner hole. The horizontal rotation drive platform (512) is equipped with a reducer to drive the horizontal rotation drive platform (512) to drive the hexagonal shaft to rotate horizontally. The vertical lifting drive group (513) is connected to the hexagonal shaft to drive the hexagonal shaft to move up and down. The vertical lifting drive group (513) is one of the following: ball screw guide, cylinder piston rod, gear rack or synchronous belt.

12. The integrated small-scale soy milk and tofu processing equipment according to claim 11, characterized in that, It also includes the control system; The control system includes a centralized touch screen, independent start / stop buttons, and a main equipment controller; The centralized touch screen is located next to each section and is used to select fully automatic / semi-automatic mode, and to display weight, images, parameters and alarms in real time; The independent start / stop buttons are located next to each section to achieve segmented control; The main controller of the equipment is configured as follows: In fully automatic mode, set the operating parameters and send instructions to the vortex blower (121) of the vacuum feeder (120), the low-speed motor (231) and electric ball valve of the soybean soaking system (200), the horizontal rotation drive platform (512) and vertical lifting drive group (513) of the stirring device (510), and the electrically controlled ball valve of the brine additive device (523), and receive feedback adjustment parameters; In semi-automatic mode, it receives independent start / stop button commands to start or stop the corresponding work section. The operating parameters include: feed rate, soaking time, grinding time, boiling temperature, and amount of coagulant added.

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