Self-cleaning intelligent walnut green peel step-by-step squeezing solid-liquid separation equipment

Abstract

The utility model relates to walnut processing equipment technical field discloses a kind of self-cleaning intelligent walnut green skin step-by-step pressing solid-liquid separation equipment, including rack, the rack right side outer wall is fixedly connected with driving motor, the rack top is fixedly connected with protective housing, the protective housing inside is rotatably connected with screw shaft by bearing, the screw shaft outer wall is fixedly connected with helical blade, the protective housing inside is fixedly connected with filter screen, the driving motor output end and the screw shaft outer wall between are connected by belt pulley, the protective housing top is provided with cleaning assembly, the protective housing outer wall is provided with extrusion component. In the utility model, adopt three-step-by-step pressing structure, through the design of screw shaft diameter increment and helical blade pitch decrease, gradually enhance pressing pressure, fully extrude walnut green skin material. After juice is efficiently separated by filter screen, juice extraction rate is significantly improved, and residue dryness is greatly reduced, to ensure that juice extraction is complete.

Description

Technical Field

[0001] This utility model relates to the technical field of walnut processing equipment, and in particular to a self-cleaning intelligent walnut green husk step-by-step pressing solid-liquid separation device. Background Technology

[0002] The green husk of a walnut accounts for 40%-60% of its total weight. Traditional methods of disposal often involve direct discarding or landfilling, but the chemical substances it contains (such as juglone) can easily cause soil and water pollution. Existing walnut husk processing equipment has many shortcomings in practical applications.

[0003] Walnut husks are highly viscous and have a high fiber content. During processing in traditional screw presses, these viscous fibers easily adhere to the screen, causing screen blockage. Frequent shutdowns for screen cleaning not only consume a lot of time and manpower but also seriously affect production efficiency and increase production costs.

[0004] Existing single-stage pressing designs struggle to adapt to the varying dehydration requirements of walnut husks as they transition from high to low moisture content. This results in low juice yield and a significant amount of juice remaining in the residue, hindering efficient solid-liquid separation. Therefore, a self-cleaning, intelligent, staged pressing solid-liquid separation device for walnut husks is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this invention provides a self-cleaning intelligent walnut green husk step-by-step pressing solid-liquid separation device. It aims to improve upon existing single-stage pressing designs, which struggle to rationally adjust to the dehydration requirements of walnut green husk material as its moisture content decreases from high to low. This results in low juice yield, with a large amount of juice remaining in the residue, hindering efficient solid-liquid separation.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a self-cleaning intelligent walnut green husk step-by-step pressing solid-liquid separation device, comprising a frame, a drive motor fixedly connected to the outer wall of the right side of the frame, a protective shell fixedly connected to the top of the frame, a spiral shaft rotatably connected inside the protective shell via bearings, spiral blades fixedly connected to the outer wall of the spiral shaft, a filter screen fixedly connected inside the protective shell, a pulley connecting the output end of the drive motor and the outer wall of the spiral shaft, a cleaning component provided on the top of the protective shell, and a pressing component provided on the outer wall of the protective shell;

[0007] The cleaning assembly includes a linear module mounting plate, which is fixedly connected to the top of the protective housing. A servo motor is fixedly connected to the outer wall of the linear module mounting plate, and a threaded rod is fixedly connected to the output end of the servo motor. A mounting plate is threadedly connected to the outer wall of the threaded rod, and a cleaning ring is fixedly connected to the bottom of the outer wall of the mounting plate. Multiple cleaning nozzles are fixedly connected to the outer wall of the cleaning ring.

[0008] As a further description of the above technical solution:

[0009] The extrusion assembly includes two cylinders, which are fixedly connected to the outer wall of the protective housing. A support plate is fixedly connected between the output ends of the two cylinders, and a pneumatic back pressure ring is fixedly connected to the side of the support plate away from the cylinders.

[0010] As a further description of the above technical solution:

[0011] The protective shell has a raw material inlet at the top, which is funnel-shaped and has a polytetrafluoroethylene coating on its inner wall.

[0012] As a further description of the above technical solution:

[0013] The diameter of the spiral shaft increases from small to large, while the spacing between the spiral blades decreases step by step.

[0014] As a further description of the above technical solution:

[0015] An elastic seal is provided between the pneumatic back pressure ring and the filter screen.

[0016] As a further description of the above technical solution:

[0017] The protective housing is equipped with a cable chain at the top and a filtrate outlet at the bottom.

[0018] As a further description of the above technical solution:

[0019] The mounting plate travels to cover the entire length of the filter.

[0020] As a further description of the above technical solution:

[0021] The filter screen is fitted over the outside of the spiral shaft.

[0022] This utility model has the following beneficial effects:

[0023] 1. This utility model employs a three-stage progressive pressing structure. Through the design of increasing spiral shaft diameter and decreasing spiral blade pitch, the pressing pressure is gradually increased to fully compress the green walnut husk material. After efficient separation by the filter screen, the juice yield is significantly improved, and the dryness of the residue is greatly reduced, ensuring thorough juice extraction and reducing resource waste.

[0024] 2. In this invention, a cleaning component is incorporated, combining high-pressure water flow or steam to thoroughly rinse the filter screen surface. The cleaning path is programmable and covers the entire length of the filter screen, effectively removing adhering fiber residue and avoiding frequent downtime caused by screen clogging in traditional equipment. This function significantly reduces the frequency of manual cleaning, ensuring long-term stable operation of the equipment and reducing maintenance complexity and costs. Attached Figure Description

[0025] Figure 1 This is a perspective view of a self-cleaning intelligent walnut green husk step-by-step pressing solid-liquid separation device proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the filter screen of a self-cleaning intelligent walnut green skin step-by-step pressing solid-liquid separation device proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the outlet of the filtrate tank of a self-cleaning intelligent walnut green skin step-by-step pressing solid-liquid separation device proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the threaded blades of a self-cleaning intelligent walnut green husk step-by-step pressing solid-liquid separation device proposed in this utility model;

[0029] Figure 5 This is a schematic diagram of the linear module mounting plate of a self-cleaning intelligent walnut green skin step-by-step pressing solid-liquid separation device proposed in this utility model;

[0030] Figure 6 for Figure 3 Enlarged view of point A in the middle.

[0031] Legend:

[0032] 1. Frame; 2. Protective housing; 3. Spiral shaft; 4. Spiral blades; 5. Raw material inlet; 6. Linear module mounting plate; 7. Servo motor; 8. Threaded rod; 9. Mounting plate; 10. Cleaning ring; 11. Cleaning nozzle; 12. Drive motor; 13. Cylinder; 14. Support plate; 15. Pneumatic back pressure ring; 16. Filtration tank outlet; 17. Filter screen. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3This utility model provides an embodiment of a self-cleaning intelligent walnut green skin step-by-step pressing solid-liquid separation device, including a frame (1). The frame (1) provides a stable support foundation for the entire device, ensuring that the device remains stable during operation and preventing shaking from affecting work efficiency and separation effect. A drive motor (12) is fixedly connected to the outer wall of the right side of the frame (1). The drive motor (12) provides a power source for the operation of the device, and its stable power output can ensure the continuous operation of each component of the device. A protective shell (2) is fixedly connected to the top of the frame (1). The protective shell (2) can not only protect the internal components from external environmental interference, but also It can prevent material from splashing during the pressing process, ensuring the safety of operators and the cleanliness of the working environment. The protective shell (2) is connected to the spiral shaft (3) through the bearing. The spiral shaft (3) is divided into three stages. The first stage spiral shaft (3) has a diameter of Φ200mm, a spiral blade (4) pitch of 50mm, and a rotation speed of 10-30rpm. It initially squeezes the material to achieve solid-liquid separation. The second stage spiral shaft (3) has a diameter of Φ300mm, a spiral blade (4) pitch of 30mm, and the pressure is increased to 1.2MPa for further pressing. The third stage spiral shaft (3) has a diameter of Φ400mm, a spiral blade (4) pitch of 15mm, and the pressure reaches 2.0MPa. By increasing the diameter and decreasing the pitch, the pressure is gradually increased. The outer wall of the spiral shaft (3) is fixedly connected with spiral blades (4). Under the drive of the spiral shaft (3), the spiral blades (4) can transport and initially squeeze the green walnut skin, realizing continuous processing of materials. The protective shell (2) is fixedly connected with a filter screen (17). The filter screen (17) is a two-half detachable type with an adjustable aperture of 0.5-2mm. The surface is sprayed with a tungsten carbide wear-resistant coating (thickness 50μm, friction coefficient ≤0.15) to ensure the passage of filtrate, intercept slag, and facilitate maintenance and replacement. The output section of the drive motor (12) and the outer wall of the spiral shaft (3) are connected by a pulley. The pulley connection method has the advantages of simple structure, smooth transmission, and buffering and vibration absorption. It can effectively reduce the noise during equipment operation and play a protective role when overloaded. The cleaning component can automatically clean the filter screen (17) to avoid clogging of the filter screen (17). The protective shell (2) is provided with a cleaning component on the top and a squeezing component on the outer wall of the protective shell (2). The squeezing component can further squeeze the green walnut skin to improve the efficiency and effect of solid-liquid separation.

[0035] Reference Figure 5The cleaning assembly includes a linear module mounting plate (6), which is fixedly connected to the top of the protective shell (2). The linear module mounting plate (6) provides a fixed foundation for the installation of the cleaning assembly, ensuring the stability and accuracy of the installation of each component. A servo motor (7) is fixedly connected to the outer wall of the linear module mounting plate (6). The servo motor (7) can precisely control the rotation of the threaded rod (8), thereby achieving precise adjustment of the position of the cleaning assembly. The positioning accuracy of the servo motor (7) is ±0.1mm, and it supports custom cleaning path programming. The moving speed is between 0.1-1m / s. The output end of the servo motor (7) is fixedly connected to a threaded rod (8). The threaded rod (8) rotates under the drive of the servo motor (7) and drives the mounting plate (9) to move through the threaded transmission, thereby realizing the linear reciprocating motion of the cleaning component. The outer wall of the threaded rod (8) is threadedly connected to the mounting plate (9). The mounting plate (9) can move along a specific direction under the drive of the threaded rod (8), thereby driving the cleaning ring (10) to clean the filter screen (17). The bottom of the outer wall of the mounting plate (9) is fixedly connected to the cleaning ring (10). The outer wall of the cleaning ring (10) is fixedly connected to multiple cleaning nozzles (11). The cleaning nozzles (11) have 12 spray holes evenly distributed around the circumference of the cleaning ring (10), with a spray angle of 30° and a spray pressure of 3-5MPa, which can powerfully flush the residue on the surface of the filter screen (17).

[0036] Reference Figure 6 The extrusion assembly includes two cylinders (13), which are fixedly connected to the outer wall of the protective shell (2). A support plate (14) is fixedly connected between the output ends of the two cylinders (13). A pneumatic back pressure ring (15) is fixedly connected to the side of the support plate (14) away from the cylinders (13). The pneumatic back pressure ring (15) is located at the end of the three-stage spiral shaft (3). The dryness of the slag is controlled by adjusting the air pressure (0.2-0.8MPa).

[0037] Reference Figures 1-3 The protective shell (2) has a raw material inlet (5) on its top. The raw material inlet (5) is funnel-shaped and its inner wall is coated with polytetrafluoroethylene. The funnel-shaped design of the raw material inlet (5) increases the material inlet area, making it easier for the material to enter quickly. The inner wall is coated with polytetrafluoroethylene, which has a friction coefficient of ≤0.1, effectively reducing the friction between the material and the inner wall of the inlet, reducing material adhesion, and ensuring that the green walnut shell material enters the equipment smoothly.

[0038] The diameter of the spiral shaft (3) increases from small to large, and the spacing between the spiral blades (4) decreases step by step.

[0039] Reference Figure 6An elastic seal is provided between the pneumatic back pressure ring (15) and the filter screen (17). The elastic seal is made of silicone and is installed in key parts. It has good sealing performance, prevents juice from overflowing, protects equipment parts, and maintains a clean working environment.

[0040] Reference Figures 1-3 The protective shell (2) has a filter tank outlet (16) at the bottom and a drag chain at the top. The drag chain has a built-in pressure-resistant water pipe (pressure ≥10MPa) to stably supply water or steam to the cleaning ring (10) and ensure that the cleaning work continues. A water valve is connected to the external water source.

[0041] Reference Figure 2 , Figure 3 and Figure 5 The mounting plate (9) travels to cover the entire length of the filter (17).

[0042] Reference Figure 2 The filter screen (17) is fitted outside the spiral shaft (3).

[0043] The device also includes a pressure sensor: installed at the end of the screw shaft (3), using a high-precision strain gauge pressure sensor with a range of 0-5MPa, which can accurately monitor the pressing pressure; and a humidity sensor located at the outlet of the dewatered material, using a capacitive humidity sensor with an accuracy of ±1%, which can accurately detect the humidity of the dewatered material.

[0044] The flow sensor is installed at the outlet (16) of the filtrate tank. It is an electromagnetic flow sensor with a range of 0-100L / min, used to accurately measure the filtrate flow rate. The flow sensor and pressure sensor transmit the real-time collected data to the PLC controller through a shielded cable to effectively avoid signal interference. The PLC controller is a Siemens S7-1200 series PLC. The PLC receives the sensor data and dynamically adjusts the screw speed, back pressure, and cleaning cycle through a preset algorithm to realize intelligent operation of the equipment, automatically adapt to different working conditions, and reduce manual intervention. At the same time, it also integrates an Ethernet communication interface and supports the Modbus TCP protocol, which facilitates data interaction with the host computer or other devices.

[0045] Frequency converter: used to control the motor speed of the screw shaft (3). An ABB ACS510 series frequency converter is used to receive analog signals (0-10V or 4-20mA) from the PLC controller to precisely adjust the motor speed, thereby achieving precise control of the screw shaft (3) speed to meet the needs of different pressing stages;

[0046] Touch screen human-machine interface (HMI): Weintek MT8071iE touch screen is selected. It is connected to the PLC controller filter tank outlet (16) via Ethernet. Operators can intuitively view the real-time operating parameters of the equipment on the touch screen. At the same time, they can also set the operating parameters of the equipment through the touch screen.

[0047] In the electrical control circuit of the equipment, Schneider Electric LC1D series contactors and Relay-RLY series relays are used. They control the start, stop and switching of equipment such as motors, solenoid valves and cleaning pumps according to the output signals of the PLC controller.

[0048] The equipment is equipped with a fault alarm system. When the pressure exceeds 2.5 MPa or the humidity is abnormal, the PLC controller will shut down the equipment and trigger an audible and visual alarm to ensure equipment and personnel safety. The audible and visual alarm device uses Chint NBB series alarms.

[0049] Working principle: Place the green walnut skin near the raw material inlet (5) and start the equipment. The anti-bridging vibrating feeder vibrates with an amplitude of 3mm and feeds the material evenly at a speed of 20kg / min. The trumpet-shaped raw material inlet (5) and the polytetrafluoroethylene coating ensure that the material enters smoothly. Then, the first-stage spiral shaft (3) rotates at a speed of 25rpm, and the material is initially squeezed, with a juice yield of about 65%. The juice flows into the collection tank through the filter screen (17), and the remaining material enters the second-stage spiral shaft (3). During this process, the pressure sensor monitors the pressing pressure in real time. If the pressure fluctuates abnormally, the PLC controller adjusts the speed of the spiral shaft (3) in time through the frequency converter to ensure stable pressing. The pressure of the second-stage spiral shaft (3) is increased to 1.2MPa to further press the material, and the juice yield is increased to 80%. The material continues to enter the third-stage spiral shaft (3). Operators can view various parameters of the secondary pressing stage in real time on the touch screen human-machine interface and make fine adjustments according to the actual situation. The tertiary screw shaft (3) combined with the pneumatic back pressure ring (15) (air pressure 0.6MPa) reaches a pressure of 2.0MPa, which fully dewaters the material and reduces the dryness of the residue to 18%, which is then discharged from the dewatered material outlet. The humidity sensor detects the humidity of the dewatered material. If the humidity does not meet the requirements, the PLC controller automatically adjusts the air pressure of the pneumatic back pressure ring (15) and the speed of the screw shaft (3) to ensure that the dryness of the residue meets the standard.

[0050] When the equipment is running, the PLC controller initiates self-cleaning according to a preset 40-minute cycle. The servo motor (7) drives the cleaning ring (10) at a speed of 0.5 m / s, and the cleaning nozzle (11) sprays a 4 MPa high-pressure water flow to rinse the filter screen (17) for 2 minutes to maintain the filtration performance of the filter screen (17). The operator can modify parameters such as the cleaning cycle and cleaning intensity on the touch screen to adapt to different working environments. The pressure sensor monitors the pressure at the end of the spiral shaft (3). When it exceeds 2.5 MPa, it sends a signal to the PLC controller, the equipment stops and triggers an audible and visual alarm. The PLC controller records the fault information in its internal memory and displays the fault type and occurrence time through the touch screen human-machine interface, which facilitates the operator to quickly troubleshoot and repair faults.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-cleaning intelligent walnut green skin step-by-step pressing solid-liquid separation equipment, comprising a rack (1), characterized in that: The rack (1) right side outer wall is fixedly connected with a driving motor (12), the rack (1) top is fixedly connected with a protective shell (2), the protective shell (2) inside is rotatably connected with a spiral shaft (3) through a bearing, the spiral shaft (3) outer wall is fixedly connected with a spiral blade (4), the protective shell (2) inside is fixedly connected with a filter screen (17), the driving motor (12) output end and the spiral shaft (3) outer wall are connected through a belt pulley, the protective shell (2) top is provided with a cleaning assembly, and the protective shell (2) outer wall is provided with an extrusion assembly. The cleaning assembly includes a linear module mounting plate (6), the linear module mounting plate (6) is fixedly connected to the top of the protective shell (2), the linear module mounting plate (6) outer wall is fixedly connected with a servo motor (7), the servo motor (7) output end is fixedly connected with a threaded rod (8), the threaded rod (8) outer wall is threadedly connected with a mounting plate (9), the mounting plate (9) outer wall bottom is fixedly connected with a cleaning ring (10), and the cleaning ring (10) outer wall is fixedly connected with a plurality of cleaning nozzles (11).

2. The self-cleaning intelligent walnut green peel step-by-step pressing solid-liquid separation equipment according to claim 1, characterized in that: The extrusion assembly includes two air cylinders (13), the air cylinder (13) is fixedly connected to the outer wall of the protective shell (2), and the two air cylinder (13) output ends are fixedly connected with a support plate (14), the support plate (14) is fixedly connected with a pneumatic back pressure ring (15) away from the air cylinder (13) side.

3. The self-cleaning intelligent walnut green peel step-by-step pressing solid-liquid separation equipment according to claim 1, characterized in that: The protective shell (2) top is provided with a raw material inlet (5), the raw material inlet (5) is a horn shape, and the inner wall is sprayed with a polytetrafluoroethylene coating.

4. The self-cleaning intelligent walnut green peel step-by-step pressing solid-liquid separation equipment according to claim 1, characterized in that: The diameter of the spiral shaft (3) increases from small to large, and the spiral blade (4) spacing gradually decreases.

5. The self-cleaning intelligent walnut green skin step-by-step pressing solid-liquid separation equipment according to claim 2, characterized in that: The pneumatic back pressure ring (15) and the filter screen (17) are provided with an elastic sealing element.

6. The self-cleaning intelligent walnut green peel step-by-step pressing solid-liquid separation equipment according to claim 3, characterized in that: The protective shell (2) top is provided with a drag chain, and the protective shell (2) bottom is provided with a filtrate tank outlet (16).

7. The self-cleaning intelligent walnut green skin step-by-step pressing solid-liquid separation equipment according to claim 1, characterized in that: The mounting plate (9) stroke covers the full length of the filter screen (17).

8. The self-cleaning intelligent walnut green peel step-by-step pressing solid-liquid separation equipment according to claim 1, characterized in that: The filter screen (17) is sleeved on the outside of the spiral shaft (3).

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