Adjustable pressing system for a raw rice noodle machine and control method thereof

Abstract

The application discloses a kind of adjustable pressing system for raw mill powder machine and its control method, the system includes support base, swingable support component, hydraulic cylinder, powder head, bottom with forming disc's barrel and with pressure regulating valve's hydraulic power unit.Swingable support component can swing horizontally around vertical axis, it is provided with the station of guiding barrel on it.The present application realizes 0-10MPa pressing force continuous regulation by stepless pressure regulating valve, adapts to different water content rice flour mass;Multiple safety protection is realized by swing position detection, barrel in place detection and lower limit magnetic detection of pressure head, cooperate with anti-belt rise baffle and baffle to provide vertical and horizontal direction mechanical limit, prevent barrel falling and component collision;Integrating cut powder knife component, blade edge is tightly attached to forming disc extrusion end face by spring, cut powder by handle drive.The present application realizes the precision, intelligentization and safety of pressing process, convenient to replace material, compact structure.

Description

Technical Field

[0001] This invention relates to the field of food processing machinery and equipment, specifically to the field of pressing processes in the continuous production of fresh wet rice noodles where precise control of pressing force is required to adapt to rice noodle dough with different moisture contents. In particular, it relates to an adjustable pressing system and its control method for a raw rice noodle machine. Background Technology

[0002] Freshly squeezed rice noodles are known for their "freshly squeezed and eaten" nature and their smooth, chewy texture. In the traditional production process, the pressing process is the key step in forming rice noodles by extruding fermented or prepared rice flour dough. The pressure, speed, and rhythm of the pressing directly determine the texture, chewiness, and taste of the rice noodles.

[0003] Existing raw rice noodle machines, such as the one disclosed in Chinese Utility Model Patent Publication No. CN208925164U, employ hydraulic drive and foot switch control, and feature a swingable raw rice noodle hopper, which improves operational convenience to some extent. However, such equipment still suffers from the following technical defects: Insufficient precision in pressing force control: Existing equipment's hydraulic systems typically only provide basic lifting and lowering functions, lacking adjustment and control over the pressing force. The moisture content, viscosity, and temperature of rice noodle dough vary with batch and process. The suitable wet basis moisture content for raw rice noodle dough is generally between 36% and 42% (i.e., water as a percentage of total weight). Soft dough with high moisture content is easily over-compressed, leading to noodle breakage, while hard dough with low moisture content is difficult to extract. Different dough states require different pressing forces and speeds to achieve optimal noodle extraction. Excessive pressure easily leads to noodle breakage and a hard texture; insufficient pressure results in poor noodle extraction and uneven noodle size. Existing equipment cannot flexibly adjust pressing parameters according to different dough states, severely affecting the consistency of finished product quality.

[0004] Material changing operations are inconvenient and pose safety hazards: Traditional equipment typically uses a fixed installation for the material cylinder, or it can only be easily removed, lacking precise positioning guidance. When placing the material cylinder, operators find it difficult to quickly and accurately align it with the center of the pressure head, easily leading to uneven pressure and material leakage. In addition, when the pressure head rises and resets, the material cylinder may be lifted due to vacuum suction or mechanical jamming, posing a risk of falling and injuring people or damaging the equipment.

[0005] Lack of intelligent detection and protection mechanisms: During the pressing process, the existing equipment cannot automatically sense whether the material cylinder has been placed in place or whether the press head has dropped to the safety limit. It is easy to cause accidents such as the press head being pressed dry or the forming plate mold being damaged due to misoperation. The equipment has low reliability and is difficult to adapt to the needs of unattended automated production.

[0006] Lack of rice noodle cutting function: After the existing equipment completes the pressing, the extruded rice noodles are in continuous long strips, which need to be manually cut before they can fall into the cooking tank for cooking. The operation is cumbersome and it is difficult to achieve continuous production.

[0007] Therefore, the current market urgently needs a raw rice noodle pressing system that can achieve precise adjustment of pressing force, ensure safe and convenient operation, and has intelligent detection and control functions. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to overcome the defects of existing raw rice noodle pressing equipment, such as insufficient pressure control accuracy, inconvenient material changing operation, and lack of safety protection mechanism, and to provide an adjustable pressing system and its control method for raw rice noodle machines.

[0009] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: An adjustable pressing system for a rice noodle pressing machine includes: Support base; A swingable support assembly, the lower end of which is rotatably connected to the support base, so that the swingable support assembly can swing horizontally around a vertical axis within a preset angle range; the preset angle range is ±40°. A hydraulic cylinder (originally a pressing drive device) is fixedly installed on the upper end of the swingable support assembly, and the piston rod output end of the hydraulic cylinder is set in the vertical direction. The powder pressing head is connected to the output end of the piston rod of the hydraulic cylinder; A material cylinder is used to hold rice flour dough, and a forming plate is provided at the bottom of the material cylinder; The hydraulic power unit is connected to the hydraulic cylinder via an oil circuit, providing power to the hydraulic cylinder; The swingable support assembly is provided with a station for guiding and / or accommodating the material cylinder. When the swingable support assembly swings to the pressing station, the material cylinder can be positioned directly below the pressing head, so that the hydraulic cylinder can drive the pressing head to squeeze the rice noodle clumps in the material cylinder, and the rice noodles are squeezed out from the holes of the forming disc.

[0010] Preferably, the hydraulic power unit includes a pressure regulating valve, which is a manual proportional relief valve or an electronically controlled proportional pressure reducing valve, used to steplessly regulate the oil pressure supplied to the hydraulic cylinder, thereby realizing stepless regulation of the pressing force.

[0011] Preferably, the pressure regulating valve has an adjustment range of 0-10 MPa.

[0012] Furthermore, it includes a swing position detection component, which includes a first sensor disposed on the swingable support component and a sensing component disposed on the support base and corresponding to the first sensor, for detecting whether the swingable support component swings to the pressing station.

[0013] Furthermore, the system includes a cylinder positioning detection component, which includes a second sensor disposed on the swingable support component and located next to the workstation, for detecting whether the cylinder is correctly placed on the workstation.

[0014] Furthermore, it includes a pressure head position protection component, which includes a magnetic element disposed on the powder pressing head and a magnetic sensor disposed on the swingable support component and corresponding to the position of the forming disk, for issuing a limit signal when the powder pressing head descends to approach the forming disk.

[0015] Preferably, the swingable support assembly includes a support plate with an arc-shaped groove that matches the shape of the material cylinder, allowing the material cylinder to slide along the arc-shaped groove directly below the powder pressing head.

[0016] Preferably, it includes anti-slip blocks, which are symmetrically installed on the fixed structures on both sides of the pressing drive device, and are used to block and separate the material cylinder that may be adsorbed when the pressing head rises.

[0017] Preferably, the forming disc is a detachable structure and is equipped with multiple forming discs with different hole diameters and hole distributions for replacement. The forming disc has multiple circular through holes with a diameter of 0.8-2.3 mm evenly distributed around its circumference, allowing for the replacement of forming discs with different hole diameters according to the required rice noodle fineness.

[0018] A control method for an adjustable pressing system in a rice noodle machine, applied to the aforementioned adjustable pressing system, includes the following steps: S1, Material preparation and swing positioning: Place the material cylinder containing rice flour dough on the station of the swingable support component, and swing the swingable support component to the pressing station; S2, Arrival Detection and Confirmation: Detect whether the swingable support assembly has swung into position and whether the material cylinder has been placed in position; S3, the powder pressing head descends to contact the agglomerate at the first pressure value: If the swingable support assembly swings into place and the material cylinder is placed in place, the hydraulic power unit is controlled to supply oil to the hydraulic cylinder, driving the powder pressing head to descend at a first pressure value until it contacts the rice noodle clump; the first pressure value is less than the second pressure value in step S4; S4, stepless pressure adjustment to the second pressure value and pressure holding extrusion: Continue to control the hydraulic power unit to steplessly adjust the oil supply pressure to the second pressure value and maintain this pressure for a predetermined time, so that the rice noodle dough is continuously extruded from the holes of the forming disc; S5, Safety Protection and Lower Limit Monitoring: During the descent of the powder pressing head, it is monitored in real time whether the powder pressing head has descended to the limit position close to the forming plate. If so, the descent of the powder pressing head is forcibly stopped. S6, Reset and Material Change: After pressing is completed, the hydraulic cylinder is controlled to drive the pressing head to rise and reset.

[0019] This includes the step of cutting the extruded rice noodles: S7, Rice Noodles: After pressing, the operator pushes the handle in one direction, causing the blade holder and blades to rotate around the first axis. The blade edge sweeps across the extrusion end face of the forming disc, and under the preload of the spring, the blade edge adheres tightly to the extrusion end face of the forming disc, cutting the rice noodles extruded from the forming disc cleanly at the root. Then, the operator pushes the handle in the opposite direction to return the blade to its initial position. After the next pressing, the handle is pushed again in the original direction to cut.

[0020] The present invention has the following beneficial effects: The adjustable pressing system of this invention has the following structural advantages or effects: Convenient material changing and efficient operation: The swingable support component swings horizontally within a range of ±40° around the vertical axis. With the help of the arc-shaped slot on the support plate to guide the material cylinder, the operator can quickly push the material cylinder into the pressing position directly below the pressing head. This significantly reduces the difficulty of aligning the material cylinder with the pressing head, shortens the material changing time between two pressings, and improves continuous production efficiency.

[0021] Multiple safety protection structures: Anti-lifting blocks and baffles provide mechanical safety protection from both vertical and horizontal directions. The anti-lifting blocks are symmetrically installed on the inner wall of the support plate and on both sides of the hydraulic cylinder. When the pressing head rises and resets, they block and separate the material cylinder that may be lifted by the vacuum suction, preventing it from falling and causing injury. The baffles are located on the side of the fixed frame, physically blocking and limiting the movement of the rotating connecting mechanism of the cooling components to prevent it from crossing the cooking tank and entering the area below the pressing components, avoiding damage to the pressing components and hydraulic cylinders due to collisions. The combined effect of these two structures provides reliable mechanical safety assurance for equipment operation.

[0022] Compact structure and easy maintenance: The pressing actuator, swingable bracket, multiple sensors, and powder cutting blade assembly are highly integrated into a single module, occupying minimal space. The forming disc features a detachable structure, allowing for quick replacement of molds with different aperture specifications as needed, and also facilitating daily cleaning and maintenance, meeting the hygiene requirements of food machinery.

[0023] Flexible process adaptability: The forming disc has multiple circular through holes with a diameter of 0.8-2.3mm evenly distributed around its circumference. It is equipped with multiple forming discs with different hole diameters and hole distributions for replacement. It can be flexibly switched according to the requirements of rice noodle thickness, adapting to the production needs of different specifications of rice noodles. There is no need to replace the whole machine, making it a multi-purpose machine.

[0024] The present invention has the following advantages or effects in terms of control method: Precise control of pressing force restores the taste of traditional processing: The pressure of the oil supplied to the hydraulic cylinder is infinitely adjustable within the range of 0-10MPa through a pressure regulating valve. Operators can flexibly set the pressing pressure according to the characteristics of rice noodle dough such as moisture content, viscosity, and temperature. During the pressing process, the set pressure is automatically maintained and enters the pressure holding stage, realizing continuous and precise control of pressing force. It perfectly simulates the strength and rhythm of hand-pressing, ensuring that the rice noodles have an authentic chewiness and smooth texture, solving the problem of inconsistent quality caused by the "one-shot" pressing of existing equipment.

[0025] Intelligent detection and fully automatic operation: Through the coordinated detection of three sets of sensors—oscillation position detection, material cylinder positioning detection, and press head lower limit protection—the control system automatically starts the pressing program after confirming both the oscillation and material cylinder positioning signals, eliminating the need for manual confirmation. During the descent of the pressing head, a magnetic proximity sensor monitors the lower limit in real time, and immediately forces a stop when the pressing head approaches the forming platen to prevent excessive compression and damage to the mold. After the pressing and holding time ends, the hydraulic cylinder is automatically controlled to rise and reset, realizing a fully automatic pressing cycle of "detection to position → start pressing → stepless pressure increase → holding pressure timer → automatic reset," providing a reliable guarantee for unattended automated production.

[0026] Dynamic safety protection mechanism: During the descent of the pressing head, a magnetic proximity sensor monitors the position of the pressing head in real time. Once the pressing head is detected to have descended to the limit position close to the forming disc, the control system immediately and forcibly stops the pressing action to prevent excessive compression of the forming disc by the pressing head. This dynamic protection mechanism is continuously effective during equipment operation, does not rely on the operator's experience and judgment, and effectively avoids mold damage and production accidents caused by misoperation or equipment failure.

[0027] The rice noodle cutting operation is convenient and ensures continuous production: After pressing, the operator pushes the handle in one direction, and the blade, under the pre-tension of the spring, sweeps across the extrusion end face of the forming disc, cutting the rice noodles cleanly at the root. Pushing the handle back in the opposite direction resets the operation, allowing for another round of cutting after the next pressing. This manual cutting method requires no additional power or air supply, is easy to operate, and is compatible with the automatic cycle of the pressing system, ensuring continuous production and avoiding production interruptions caused by manual cutting.

[0028] This invention allows for a wide pressure adjustment range of 0-10MPa, covering the pressing needs of various materials from soft rice paste to hard rice flour dough. The equipment is highly versatile, multi-functional, and has good market promotion value. Attached Figure Description

[0029] Figure 1 This is a schematic diagram showing the installation position of the adjustable pressing system of the present invention in the whole machine; Figure 2 This is an exploded view of the adjustable pressing system of the present invention; Figure 3 This is a frontal perspective view of the adjustable pressing system of the present invention. Figure 4 for Figure 3 Enlarged schematic diagram of Part I (Schematic diagram of the assembly structure of the powder pressing head and magnetic components in the adjustable pressing system); Figure 5 This is a bottom-view perspective view of the adjustable pressing system of the present invention. Figure 6 for Figure 5 Enlarged schematic diagram of Part II; Figure 7 This is a top view schematic diagram of the hydraulic system in the adjustable pressing system of the present invention; Figure 8 This is a schematic diagram of the overall structure of the hydraulic system in the adjustable pressing system of the present invention; Figure 9 This is a schematic diagram illustrating the working principle of the hydraulic system in the adjustable pressing system of the present invention; Figure 10 This is an exploded view of the powder cutting blade assembly in the adjustable pressing system of the present invention.

[0030] Serial numbers and component names in the diagram: 2. Pressing components; 2-1. First oil cylinder; 2-2. First oil inlet; 2-3. First oil return outlet; 2-4. Support plate; 2-5. First proximity sensor; 2-6. Support plate; 2-7. First bushing; 2-8. Fixing frame; 2-9. Baffle; 2-10. Magnetic proximity sensor; 2-11. First base; 2-12. Sensing plate; 2-13. Forming disc; 2-14. Material cylinder; 2-15. First piston rod; 2-16. Pad plate; 2-17. Pressing head; 2-18. Second proximity sensor; 2-19. First proximity sensor bracket; 2-20. Magnetic component; 2-21. Sealing plate; 2-22. Magnetic proximity sensor bracket; 2-23. Stop block; 2-24. Arc-shaped groove; 3. Powder cutter assembly; 3-1. Blade holder; 3-2. Blade; 3-3. Guide rod; 3-4. Spring; 3-5. Second bushing; 3-6. First shaft; 3-7. Third bushing; 3-8. Limiting block; 3-9. Handle; 3-10. Bearing seat; 3-11. Deep groove ball bearing; 4. Rice noodle cooking components; 4-1. Rice noodle cooking tank; 4-16. Cold water tank; 4-19. Water storage tank; 5. Hydraulic system; 5-1. Oil tank; 5-2. Motor; 5-3. First oil inlet pipe; 5-4. Oil pump; 5-5. First oil outlet pipe; 5-6. Oil manifold inlet; 5-7. Oil manifold outlet; 5-8. First solenoid directional valve; 5-9. Pressure regulating valve; 5-10. Pilot-operated relief valve; 5-11. Pressure gauge; 5-12. Second solenoid directional valve; 5-13. Radiator inlet pipe; 5-14. Radiator outlet pipe; 5-15. Radiator; 5-16. One-way throttle valve; 5-17. Third return port; 5-18. Third outlet; 5-19. Fourth return port; 5-20. Fourth outlet; 5-21. Oil manifold. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention and not to limit its scope of protection. Example

[0032] like Figures 1 to 9 As shown, an adjustable pressing system for a rice noodle machine mainly comprises two parts: a pressing component 2 and a hydraulic system 5. The pressing component 2 constitutes the actuator, while the hydraulic system 5 constitutes the power and control mechanism.

[0033] The pressing component 2 is fixedly installed on the cabinet surface of the automated rice noodle pressing machine via the first base 2-11. The first base 2-11 is a cylindrical structure, and its interior is equipped with bearings or bushings for rotatably supporting the swingable support assembly above.

[0034] Swingable support component: like Figures 2 to 6 As shown, the swingable support assembly includes components such as a first bushing 2-7, a support plate 2-6, and a bracket plate 2-4. The lower end of the first bushing 2-7 is rotatably mounted inside the first base 2-11, allowing the entire support assembly to swing horizontally within an angle range of approximately ±40° around a vertical axis. This swinging function allows the operator to easily swing the material cylinder 2-14 out from the pressing station (directly below the powder pressing head) for easy filling of rice flour dough or replacement of the forming disc 2-13.

[0035] A support plate 2-6 is welded and fixed to the upper end of the first bushing 2-7. The support plate 2-6 is made of stainless steel plate and has an arc-shaped groove 2-24 at its front end. The shape of the arc-shaped groove 2-24 matches the outer wall contour of the material cylinder 2-14 and is used to guide the material cylinder 2-14 to slide directly below the powder pressing head 2-17.

[0036] A bracket plate 2-4 is welded and fixed on the support plate 2-6. The bracket plate 2-4 extends vertically upward, and its upper end surface is fixedly installed as the first oil cylinder 2-1 of the pressing drive device through the pad plate 2-16.

[0037] Press drive unit and powder pressing head 2-17: The first hydraulic cylinder 2-1 is a double-acting hydraulic cylinder. Its outer wall has a first oil inlet 2-2 and a first oil return port 2-3, which are respectively connected to the pressure oil circuit and return oil circuit of the hydraulic system 5. The first piston rod 2-15 of the first hydraulic cylinder 2-1 passes downwards through the pad plate 2-16 and the support plate 2-4, and its end is fixedly connected to the pressing head 2-17 via threads. The pressing head 2-17 is made of food-grade stainless steel or food-grade plastic, and its outer diameter matches the inner diameter of the material cylinder 2-14, ensuring that the rice flour clumps do not leak from the side wall between the pressing head 2-17 and the material cylinder 2-14 during pressing.

[0038] like Figure 3 and Figure 4 As shown, an annular groove is machined on the outer wall of the pressing head 2-17, and a magnetic component 2-20 is embedded in the groove. The magnetic component 2-20 is a ring magnet or a discretely distributed permanent magnet. The outer layer of the magnetic component 2-20 is welded and sealed with a sealing plate 2-21, which not only protects the magnetic component from contamination and corrosion by rice flour lumps, but also enhances the structural strength of the pressing head 2-17.

[0039] Intelligent detection and protection components: (a) Swing position detection component like Figure 2 and Figure 3As shown, a first proximity sensor 2-5 is installed on the bottom (or side) of the support plate 2-6 via a first proximity sensor bracket 2-19. At the upper end of the outer cylinder of the first base 2-11, a sensing plate 2-12 is fixedly installed at a position corresponding to the first proximity sensor 2-5. When the operator manually swings the swingable support assembly to the pressing station, the first proximity sensor 2-5 aligns with the sensing plate 2-12, and the sensor outputs a positioning signal. This signal can be sent to the control system as one of the conditions for allowing the pressing program to start, preventing bias accidents caused by incomplete swinging.

[0040] (ii) Cylinder positioning detection component like Figure 2 and Figure 3 As shown, a second proximity sensor 2-18 is installed on the bottom surface of the support plate 2-6 (near the end of the arc-shaped groove 2-24). When the operator pushes the material cylinder 2-14 into the pressing station along the arc-shaped groove 2-24, the outer wall of the material cylinder 2-14 will block the detection surface of the second proximity sensor 2-18, triggering the sensor to output a signal. After receiving this signal, the control system can confirm that the material cylinder has been correctly placed before executing the descent action of the pressing head. If the material cylinder is not in place, the pressing program cannot start, thus effectively preventing empty pressure or uneven pressure.

[0041] (iii) Pressure head position protection component like Figure 3 and Figure 5As shown, a magnetic proximity sensor 2-10 is mounted on the fixed frame 2-8 on the right side of the support plate 2-6 via a magnetic proximity sensor bracket 2-22. The installation height of the magnetic proximity sensor 2-10 is basically flush with or slightly higher than the upper surface of the forming disc 2-13. When the first hydraulic cylinder 2-1 drives the pressing head 2-17 to descend close to the forming disc 2-13, the magnetic component 2-20 embedded in the pressing head 2-17 enters the detection range of the magnetic proximity sensor 2-10, and the sensor outputs a limit signal. After receiving this signal, the control system will forcibly stop the pressing head from descending further, even if the preset pressing time or pressure has not been reached, to prevent the pressing head from over-pressing and damaging the forming disc 2-13. At the same time, this signal can also be used as a trigger signal for the start of the pressing and holding stage, achieving precise control. A baffle 2-9 is provided on the fixed frame 2-8. The baffle 2-9 is located on the side of the fixed frame 2-8 and has evenly distributed through holes to reduce its weight. Because the rotating connection mechanism of the filter bucket in the cooling and cleaning components has a large rotation angle range and no locking point when rotating horizontally, if the operator accidentally rotates the filter bucket and its rotating connection mechanism excessively, causing it to pass directly above the cooking tank 4-1 and enter below the pressing component 2, and if the pressing program is started or the first oil cylinder 2-1 rises and resets at this time, the rotating connection mechanism of the filter bucket will mechanically interfere with the pressing head 2-17 or the support plate 2-4, causing collision damage. The baffle 2-9 is used to physically block and limit the rotation angle range of the rotating connection mechanism of the filter bucket before it enters the area below the pressing component, preventing it from passing over the cooking tank 4-1 and entering the area below the pressing component, thereby avoiding damage to the pressing component and related oil cylinders due to collision.

[0042] (iv) Anti-lifting block like Figure 4 As shown, stop blocks 2-23 are symmetrically installed on the inner wall of the support plate 2-4 (on both sides of the first oil cylinder 2-1). The stop blocks 2-23 extend downwards, with their lower ends positioned above the pressing head 2-17. After pressing, the first oil cylinder 2-1 drives the pressing head 2-17 to rise and reset. If the material cylinder 2-14 is lifted by the pressing head 2-17 due to vacuum adsorption or rice flour adhesion, when the material cylinder 2-14 rises to a certain height, its edge will first contact the lower end of the stop block 2-23, thus being blocked and forcibly detached from the pressing head 2-17, falling back onto the support plate 2-6. This mechanical anti-lifting structure effectively prevents material cylinder falls and ensures operational safety.

[0043] Powder cutter assembly like Figure 5 , Figure 6 and Figure 10As shown, this adjustable pressing system also includes a rice noodle cutting assembly 3, which is used to cut the continuously extruded rice noodles after pressing so that they can fall into the cooking tank for cooking. The rice noodle cutting assembly 3 is installed on the left side of the swingable support assembly, that is, below the material cylinder when pressing. The rice noodle cutting assembly 3 specifically includes a knife holder 3-1, a blade 3-2, a guide rod 3-3, a spring 3-4, a second bushing 3-5, a first shaft 3-6, a third bushing 3-7, a bearing seat 3-10, a deep groove ball bearing 3-11, and a limiting block 3-8, etc. The tool holder 3-1 is rotatably fixed to the side of the support plate 2-6 or the fixing frame 2-8 through a rotating support structure consisting of the first shaft 3-6, the bearing seat 3-10, and the deep groove ball bearing 3-11. The second bushing 3-5 is disposed between the first shaft 3-6 and the tool holder 3-1 to reduce friction and improve rotational stability. The end of the tool holder 3-1 is connected to a handle 3-9 for easy manual operation by the operator.

[0044] The blade 3-2 is connected to the blade holder 3-1 via a guide rod 3-3 and a spring 3-4. A third bushing 3-7 is fitted onto the guide rod 3-3 and is embedded in the blade holder 3-1, providing guidance for the axial movement of the guide rod 3-3. Under the preload of the spring 3-4, the cutting edge of the blade 3-2 is always in close contact with the extrusion end face of the molding disc 2-13, i.e., the lower surface of the rice noodles that are extruded. Figure 6 As shown. This flexible preload design ensures that the blades can adaptively fit tightly against the disc surface, preventing gaps from causing the noodles to not cut properly.

[0045] After pressing is complete, the operator pushes handle 3-9 in one direction (e.g., clockwise), causing the blade holder 3-1 and blade 3-2 to rotate around the first axis 3-6 by a certain angle. This allows the cutting edge of blade 3-2 to sweep across the extrusion end face of the forming disc 2-13, cutting the rice noodles extruded from the extrusion end face of the forming disc 2-13 cleanly at the root. At this time, the protrusion on one side of the limiting block 3-8 abuts against the side of the support plate 2-6, limiting the overtravel. After cutting, the operator pushes handle 3-9 in the opposite direction to return to the initial position. After the next pressing is completed, handle 3-9 is pushed again in the original direction for cutting, and this process is repeated.

[0046] This rice noodle cutting blade assembly 3 is manually triggered, featuring a simple and reliable structure that is compatible with the automatic cycle of the pressing system. Once pressing is complete, the operator can simply push the handles 3-9 with one hand to cut the rice noodles, requiring no additional power or air supply, making it particularly suitable for small to medium-sized commercial applications.

[0047] Hydraulic system: like Figures 7 to 9 As shown, the hydraulic system 5 provides power to the pressing system and enables precise stepless adjustment of the pressing force.

[0048] The hydraulic system 5 includes an oil tank 5-1, a motor 5-2, an oil pump 5-4, a first oil inlet pipe 5-3, a first oil outlet pipe 5-5, an oil manifold block 5-21, and various hydraulic valves integrated on the oil manifold block 5-21. The motor 5-2 has a power of 5.5kW and drives the oil pump 5-4 to draw oil from the oil tank 5-1, which is then delivered to the oil inlet of the oil pump 5-4 via the first oil inlet pipe 5-3. The high-pressure oil output by the oil pump 5-4 is delivered to the oil inlet 5-6 of the oil manifold block via the first oil outlet pipe 5-5. The oil pump 5-4 is a gear pump with a rated flow rate of 8L / min.

[0049] The hydraulic manifold block 5-21 is the control center of the hydraulic system, and the following key components are integrated on it: First solenoid directional valve 5-8: Three-position four-way solenoid valve, used to control the direction of movement (upward / downward / pressure holding) of the first oil cylinder 2-1. Pressure regulating valve 5-9: Used for stepless adjustment of the oil pressure supplied to the first oil cylinder 2-1, with an adjustment range of 0-10MPa. By rotating the handwheel of the pressure regulating valve or by electronic proportional adjustment, the operator can flexibly set the pressing force according to the characteristics of the rice flour dough, such as moisture content, viscosity, and temperature. Pilot-operated relief valve 5-10: Sets the maximum safe pressure of the system, such as 12 MPa. When the system pressure exceeds the set value, it automatically overflows to provide safety protection. Pressure gauge 5-11: Displays the system working pressure in real time, facilitating monitoring and adjustment by operators; Second electromagnetic reversing valve 5-12: Used to control the lifting and lowering of the rice noodle cooking component and to control the actions of other functional modules outside this system; One-way throttle valve 5-16: Used to control the speed of the lifting cylinder to achieve smooth operation.

[0050] The oil circuit block 5-21 is equipped with an oil outlet 5-7, a third oil outlet 5-18, a third oil return port 5-17, a fourth oil outlet 5-20, and a fourth oil return port 5-19. The fourth oil outlet 5-20 connects to the first oil inlet 2-2 of the first oil cylinder 2-1, and the fourth oil return port 5-19 connects to the first oil return port 2-3. The third oil outlet 5-18 and the third oil return port 5-17 are used to connect to the second oil cylinder of the lifting and cooking powder component.

[0051] The oil outlet of the oil circuit block 5-21 is connected to the first oil cylinder 2-1 via an oil pipe. Specifically, the fourth oil outlet 5-20 is connected to the first oil inlet 2-2 of the first oil cylinder 2-1, and the fourth oil return port 5-19 is connected to the first oil return port 2-3.

[0052] The system is also equipped with a radiator 5-15. The return oil is cooled by the radiator before returning to the oil tank, ensuring that the oil temperature is controlled below 50℃ and guaranteeing long-term stable operation of the system.

[0053] Working process and control logic A typical workflow of the adjustable pressing system of this invention is as follows: S1, Material preparation and swing positioning: The operator loads the prepared rice noodle dough into the material cylinder 2-14 and places the material cylinder with the forming disc 2-13 facing down on the station of the swingable support component; then, holding the material cylinder 2-14 or the support plate 2-6, the operator swings the swingable support component horizontally to the pressing station. S2, Arrival Detection and Confirmation: The first proximity sensor 2-5 detects the sensing plate 2-12 and sends a swing-in signal; the operator pushes the material cylinder 2-14 along the arc-shaped groove 2-24 until its outer wall blocks the second proximity sensor 2-18 and sends a material cylinder in position signal; the control system receives the above two in position signals and confirms that the swingable support assembly has swung in position and the material cylinder has been placed in position. S3, the powder pressing head descends to contact the agglomerate at the first pressure value: The control system controls the hydraulic power unit 5 to supply oil to the hydraulic cylinder 2-1, driving the pressing head 2-17 to descend at a first pressure value until it contacts the rice noodle clump; specifically: the first solenoid reversing valve 5-8 switches to the left position, the hydraulic oil is adjusted to the first pressure value by the pressure regulating valve 5-9 and then enters the rodless chamber of the first cylinder 2-1, pushing the first piston rod 2-15 and the pressing head 2-17 to descend at a set speed, the first pressure value is less than the second pressure value of the subsequent pressure holding stage; The first pressure value is the initial contact pressure before the pressing head contacts the rice noodle clump. Its function is to drive the pressing head downwards with a lower pressure, avoiding a violent collision with the rice noodle clump due to inertial impact during rapid descent without load, which could cause clump splashing or damage to the pressing head. Simultaneously, the first pressure value allows the pressing head to approach the clump surface at a stable and controllable speed, providing a precise starting point for subsequent pressure switching and ensuring the repeatability and consistency of the pressing process. The first pressure value is lower than the second pressure value in the subsequent holding pressure stage. S4, stepless pressure adjustment to the second pressure value and pressure holding extrusion: The hydraulic power unit 5 continues to steplessly adjust the oil supply pressure to the second pressure value and maintain this pressure for a predetermined time, so that the rice noodle dough is continuously extruded from the holes of the forming disc 2-13. Specifically, after the pressing head 2-17 contacts the rice noodle dough, the pressure gradually builds up. The operator sets the pressing pressure by rotating the pressure regulating valve 5-9 according to the characteristics of the current rice noodle dough. For example, it is set to 2MPa for soft dough with high water content and 5MPa for harder dough. When the pressure reaches the set value, the pressure regulating valve 5-9 automatically maintains the pressure and enters the pressure holding stage. The continuous extrusion makes the rice noodles evenly extruded from the small holes of the forming disc 2-13 and fall into the cooking tank below. The second pressure value is the holding pressure during the rice noodle dough extrusion stage. Its function is to increase and maintain the pressure at a relatively high set value after the extrusion head contacts and begins to extrude the dough, providing a continuous and stable extrusion driving force for the rice noodle dough, ensuring that the rice noodles are continuously and evenly extruded from the forming disc holes. The level of the second pressure value directly affects the extrusion speed, density, and surface quality of the rice noodles—too high pressure can easily lead to noodle breakage and a hard texture, while too low pressure will result in poor noodle extrusion and uneven thickness. Operators can steplessly adjust the second pressure value within the range of 0-10 MPa according to the moisture content, viscosity, temperature, and other characteristics of the rice noodle dough, achieving precise adaptation for different batches and states of dough. S5, Safety Protection and Lower Limit Monitoring: During the descent of the pressing head 2-17, the magnetic proximity sensor 2-10 monitors in real time. If the pressing head 2-17 descends close to the forming disc 2-13, the sensor sends a limit signal, and the control system immediately stops the pressing action to prevent damage. S6, Reset and Material Change: After the pressing and holding time is over, the first electromagnetic reversing valve 5-8 switches to the right position, and hydraulic oil enters the rod chamber of the first oil cylinder 2-1. The piston rod 2-15 drives the powder pressing head 2-17 to rise and reset. If the material cylinder 2-14 is accidentally lifted, the anti-lifting block 2-23 blocks the edge of the material cylinder 2-14 to separate it from the powder pressing head 2-17. The operator can then pull out the material cylinder 2-14 to proceed with the next filling.

[0054] This includes the step of cutting the extruded rice noodles: S7, Rice Noodles: After pressing, the operator pushes handle 3-9 in one direction, causing the blade holder 3-1 and blade 3-2 to rotate around the first axis 3-6. The cutting edge of blade 3-2 sweeps across the extrusion end face of the forming disc 2-13. Under the preload of spring 3-4, the cutting edge of blade 3-2 adheres tightly to the extrusion end face of the forming disc 2-13, cutting the rice noodles extruded from the forming disc 2-13 cleanly at the root. Then, the operator pushes handle 3-9 in the opposite direction, returning blade 3-2 to its initial position. After the next pressing, handle 3-9 is pushed again in the original direction for cutting.

[0055] In summary, this invention, through the organic combination of a swingable support component, a stepless pressure-regulating hydraulic system, and a multi-sensor collaborative detection and protection mechanism, achieves precision, intelligence, and safety in the pressing process of fresh rice noodles, significantly improving the production efficiency and product quality consistency of fresh wet rice noodles, and has extremely high practical value and market promotion prospects.

[0056] Relationship with the overall machine like Figures 1-3As shown, the adjustable pressing system, as the core functional module of the automated rice noodle machine, is integrated and installed on the cabinet component 1 of the whole machine in a modular manner.

[0057] The automatic freshly pressed rice noodle machine cabinet component 1 includes a frame 1-3, a table 1-1 fixed to the top of the frame 1-3, and a base plate 1-2 fixed to the bottom of the frame 1-3; the frame 1-3 adopts a cubic frame structure welded from square tubes, providing a stable installation foundation for each functional component.

[0058] The adjustable pressing system is fixedly installed on the table 1-1 via its first base 2-11, located at the front or middle of the machine, facilitating material changing operations. Directly below the pressing system, in the projected area of ​​the pressing station, is the rice noodle cooking tank 4-1 of the lifting and cooking component 4, allowing the rice noodles extruded from the forming disc 2-13 to fall directly into the boiling water in the cooking tank 4-1 below, achieving a seamless connection between pressing and cooking. The cooking component 4 also includes a cold water tank 4-16 and a water storage tank 4-19.

[0059] Fixed installation of the pressing system The support base 2-11 of the pressing system is fixed to the tabletop 1-1 by bolts or welding. Mounting holes are provided at corresponding positions on the tabletop 1-1 for inserting fixing bolts. The central axis of the support base 2-11 is coaxially aligned with the central axis of the cooking tank 4-1 below, ensuring that the extruded rice noodles fall vertically into the center of the cooking tank and avoid sticking to the tank wall.

[0060] Spatial layout of swingable components The swing axis of the swingable support assembly coincides with the axis of the first base 2-11. When the operator needs to fill rice noodle dough or change the forming plate 2-13, the support plate 2-6, together with the first oil cylinder 2-1, bracket plate 2-4 and other components installed on it, can be swinged horizontally outward around the swing axis at a certain angle, about ±40°, so that the material cylinder 2-14 is away from the area directly above the rice noodle cooking tank 4-1, freeing up operating space. After filling, the support assembly is returned to the pressing position, and the first proximity sensor 2-5 and the sensing plate 2-12 cooperate to complete the positioning detection.

[0061] Alignment with the rice noodle cooking pot At the pressing station, a vertical gap of 20-50mm is maintained between the bottom surface of the forming disc 2-13 and the upper edge of the opening of the cooking tank 4-1. This gap ensures that the extruded rice noodles fall smoothly into the cooking tank and prevents water splashing from the boiling tank from clogging the extrusion end of the forming disc. The diameter of the cooking tank 4-1 is designed to be 2-4 times the diameter of the forming disc 2-13 to ensure that all extruded rice noodles fall into the effective area inside the tank.

[0062] Integrated installation of hydraulic systems The hydraulic system 5 is an independent power unit, installed inside or at the bottom of the cabinet component 1 in the form of an integrated hydraulic station.

[0063] Specifically, components such as the oil tank 5-1, motor 5-2, oil pump 5-4, and hydraulic manifold block 5-21 are centrally mounted on the base plate 1-2, or on a specially designed hydraulic system mounting bracket in the middle of the frame 1-3. The oil outlet of the hydraulic manifold block 5-21 is connected via a high-pressure hose or rigid pipe to the first oil inlet 2-2 and the first oil return port 2-3 of the first cylinder 2-1 on the platform 1-1. The pipelines run along the inner wall of the frame 1-3 to avoid exposure and interference with operation.

[0064] The radiator 5-15 is installed on the side or back of the frame 1-3 to ensure unobstructed airflow for heat dissipation. The first solenoid directional valve 5-8 and the second solenoid directional valve 5-12, which control the operation of the hydraulic system, are electrically connected to the control unit, which can be installed in the electrical control box of the entire machine. The control unit is a PLC or a microcontroller.

[0065] Electrical and control connections The signal lines of each sensor in the adjustable pressing system, including the first proximity sensor 2-5, the second proximity sensor 2-18, and the magnetic proximity sensor 2-10, are introduced into the cabinet through the wire hole on the table 1-1 and converged to the control unit of the whole machine.

[0066] The control unit receives the following input signals: The swing-in signal comes from the first proximity sensor 2-5; The positioning signal of the material cylinder 2-14 comes from the second proximity sensor 2-18; The lower limit signal of the pressure head comes from the magnetic proximity sensor 2-10; The control unit outputs the following control signals: The reversing signal of the first electromagnetic reversing valve 5-8 controls the rising / falling / pressure holding of the pressing cylinder; The proportional adjustment signal for pressure regulating valves 5-9, if electronic proportional pressure regulation is used; The control program is set in the control unit to realize a fully automatic pressing cycle of "detection of position → start pressing → stepless pressure increase → pressure holding timer → automatic reset".

[0067] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adjustable pressing system for a rice noodle machine, characterized in that, include: Support base (2-11); A swingable support assembly, the lower end of which is rotatably connected to the support base (2-11), so that the swingable support assembly can swing horizontally around a vertical axis within a preset angle range; A hydraulic cylinder (2-1) is fixedly installed on the upper end of the swingable support assembly, and the piston rod output end of the hydraulic cylinder is arranged in the vertical direction. The powder pressing head (2-17) is connected to the piston rod output end of the hydraulic cylinder; The material cylinder (2-14) is used to hold rice flour dough, and the bottom of the material cylinder (2-14) is provided with a forming plate (2-13). The hydraulic power unit (5) is connected to the hydraulic cylinder through an oil circuit to provide power to the hydraulic cylinder; The hydraulic power unit (5) includes a pressure regulating valve (5-9), which is a manual proportional relief valve or an electronically controlled proportional pressure reducing valve, used to steplessly regulate the oil pressure supplied to the hydraulic cylinder (2-1), with an adjustment range of 0-10MPa; The swingable support assembly is provided with a station for guiding and accommodating the material cylinder. When the swingable support assembly swings to the pressing station, the material cylinder (2-14) can be positioned directly below the pressing head (2-17) so that the hydraulic cylinder can drive the pressing head (2-17) to squeeze the rice noodle clump in the material cylinder (2-14) and the rice noodles are squeezed out from the hole of the forming disc (2-13).

2. The adjustable pressing system according to claim 1, characterized in that, It also includes a swing position detection component, which includes a first sensor (2-5) disposed on the swingable support component and a sensing component (2-12) disposed on the support base (2-11) and corresponding to the first sensor (2-5), for detecting whether the swingable support component swings to the pressing station.

3. The adjustable pressing system according to claim 1, characterized in that, It also includes a barrel positioning detection component, which includes a second sensor (2-18) disposed on the swingable support component and located next to the workstation, for detecting whether the barrel (2-14) is correctly placed on the workstation.

4. The adjustable pressing system according to claim 1, characterized in that, It also includes a pressure head position protection component, which includes a magnetic element (2-20) disposed on the powder pressing head (2-17) and a magnetic sensor (2-10) disposed on the swingable support component and corresponding to the position of the forming disc (2-13), for issuing a limit signal when the powder pressing head (2-17) descends to approach the forming disc (2-13).

5. The adjustable pressing system according to claim 1, characterized in that, The swingable support assembly includes a support plate (2-6), on which an arc-shaped groove (2-24) matching the shape of the material cylinder (2-14) is provided. The material cylinder (2-14) can slide along the arc-shaped groove (2-24) to directly below the powder pressing head (2-17).

6. The adjustable pressing system according to claim 1, characterized in that, It also includes anti-lifting blocks (2-23), which are symmetrically installed on the inner wall of the support plate (2-4) and located on both sides of the hydraulic cylinder (2-1), and are used to block and separate the material cylinder (2-14) that may be adsorbed when the powder pressing head (2-17) rises.

7. The adjustable pressing system according to claim 1, characterized in that, The molding disc (2-13) is a detachable structure and is equipped with multiple molding discs with different apertures and aperture distributions for replacement.

8. The adjustable pressing system according to claim 1, characterized in that, It also includes a rice noodle cutting knife assembly (3), which is mounted on the swingable support assembly and located below the forming disc (2-13) for cutting the rice noodles extruded from the forming disc (2-13) after pressing; the rice noodle cutting knife assembly (3) includes a knife holder (3-1), a blade (3-2), a guide rod (3-3), a spring (3-4), and a handle (3-9); the blade (3-2) is connected to the knife holder (3-1) through the guide rod (3-3) and the spring (3-4), and the spring (3-4) keeps the cutting edge of the blade (3-2) in close contact with the extrusion end face of the forming disc (2-13); the handle (3-9) is connected to the knife holder (3-1) for manually triggering the cutting action.

9. A control method for an adjustable pressing system of a rice noodle machine, applied to the adjustable pressing system according to any one of claims 1 to 8, characterized in that, Includes the following steps: S1, Material preparation and swing positioning: Place the material cylinder (2-14) containing rice flour dough on the station of the swingable support component, and swing the swingable support component to the pressing station; S2, Arrival Detection and Confirmation: Detect whether the swingable support assembly has swung into place and whether the material cylinder (2-14) has been placed in place; S3, the powder pressing head descends to contact the agglomerate at the first pressure value: If the swingable support assembly swings into place and the material cylinder (2-14) is placed in place, the hydraulic power unit (5) is controlled to supply oil to the hydraulic cylinder (2-1), driving the powder pressing head (2-17) to descend at the first pressure value until it contacts the rice noodle dough; the first pressure value is less than the second pressure value in step S4; S4, stepless pressure adjustment to the second pressure value and pressure holding extrusion: Continue to control the hydraulic power unit (5) to steplessly adjust the oil supply pressure to the second pressure value and maintain the pressure for a predetermined time, so that the rice noodle dough is continuously extruded from the holes of the forming disc (2-13); S5, Safety Protection and Lower Limit Monitoring: During the descent of the powder pressing head (2-17), it is monitored in real time whether the powder pressing head (2-17) has descended to the limit position close to the forming plate (2-13). If so, the descent of the powder pressing head (2-17) is forcibly stopped. S6, Reset and Material Change: After pressing is completed, the hydraulic cylinder is controlled to drive the pressing head (2-17) to rise and reset.

10. The control method for the adjustable pressing system of a rice noodle machine according to claim 9, characterized in that: This includes the step of cutting the extruded rice noodles: S7, Rice Noodles: After pressing, the operator pushes the handle 3-9 in one direction, causing the blade holder 3-1 and the blade 3-2 to rotate around the first axis 3-6. The cutting edge of the blade 3-2 sweeps across the extrusion end face of the forming disc 2-13. Under the preload of the spring 3-4, the cutting edge of the blade 3-2 adheres tightly to the extrusion end face of the forming disc 2-13, cutting the rice vermicelli extruded from the forming disc 2-13 cleanly. Then, the operator pushes the handle 3-9 in the opposite direction to return the blade 3-2 to its initial position. After the next pressing, the operator pushes the handle 3-9 again in the original direction to cut the rice vermicelli.

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