Soybean screw oil press capable of being quickly dredged

Abstract

The invention relates to the technical field of soybean deep processing, and particularly discloses a quickly-dredged soybean screw oil press which comprises a soybean conveying cylinder, an oil pressing outer cylinder and a soybean meal discharging cylinder which are sequentially connected, and ring discs are arranged at the two ends, connected with the soybean conveying cylinder and the soybean meal discharging cylinder, of the oil pressing outer cylinder. A plurality of limiting sliding grooves formed in the radial direction are evenly formed in the opposite side faces of the two annular discs, a pressing strip aligned with each limiting sliding groove in the front-back direction is arranged between the two annular discs, sliding blocks matched with the limiting sliding grooves are arranged at the two ends of the pressing strip, and springs are arranged between the sliding blocks and the limiting sliding grooves; a plurality of inclined plane pressing notches are formed in the radial outer surface of each pressing strip, and the peripheries of all the pressing strips are sleeved with inner inclined plane pressing rings with the same number as the inclined plane pressing notches; according to the soybean screw oil press, control and adjustment of the oil outlet gaps between the pressing strips are achieved, and after the oil outlet gaps are blocked, online rapid dredging and cleaning of the whole soybean screw oil press can be achieved.

Description

Technical Field

[0001] This invention relates to the field of soybean deep processing technology, and specifically discloses a fast-draining soybean screw oil press. Background Technology

[0002] The deep processing of soybeans mainly involves extracting and utilizing their oils and proteins. The industrial methods for producing soybean oil are primarily hot pressing and cold pressing. Hot-pressed soybean oil differs somewhat from cold-pressed soybean oil. Cold pressing technology involves directly pressing oilseeds that have not undergone the processing of the milk endosperm and steaming / roasting process using a low-temperature oil press to obtain oils and oil cakes with certain nutritional value and intact molecular structure.

[0003] The existing industrial equipment for low-temperature soybean oil extraction mainly uses screw oil presses. Traditional screw oil presses mainly consist of a feeding device, pressing chamber, screw, cake outlet head, and transmission system. When soybeans are fed into the pressing chamber, the screw pitch or tooth depth gradually decreases, causing the soybeans to rub and squeeze against each other, thereby extruding the oil through the gaps between adjacent pressing bars.

[0004] For example, utility model patent application number 202421934003.8 discloses a screw oil press, including a pressing box and a pressing chamber, with the pressing chamber located inside the pressing box; a pressing screw, which is movably installed inside the pressing chamber; and a cooling assembly located at the top of the pressing box to cool the interior of the pressing box. This screw oil press, through the design of the cooling assembly, can cool the pressing chamber and the pressing screw inside the pressing box, preventing the oilseeds from being affected by high temperatures during pressing and improving the quality of the oil. The pressing chamber in this screw oil press is formed by multiple circumferentially evenly arranged pressing bars, with gaps between adjacent pressing bars for oil extraction. However, in this patent, the pressing bars are fixedly installed in the pressing chamber. During soybean oil extraction, the oil extraction gaps are easily blocked by soybean meal, leading to a decrease in the actual oil yield. Once a blockage occurs, the operator needs to first remove the pressing screw, empty the interior of the pressing chamber, then knock the pressing bars out of the pressing chamber for cleaning, and finally reinstall the pressing bars. The entire process makes each unclogging and cleaning of the screw oil press not only time-consuming and labor-intensive, but also seriously affects the oil extraction efficiency of soybeans. Therefore, in view of the above-mentioned shortcomings of existing screw oil presses, this application proposes a soybean screw oil press capable of online rapid unclogging to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a soybean screw oil press that can be quickly unclogged online, in order to solve the problem that when the oil outlet gap of the existing screw oil press is blocked, it is necessary to disassemble and clean the inside of the press, which is time-consuming and laborious, and thus affects the overall oil pressing efficiency.

[0006] This invention is achieved through the following technical solution: A fast-draining soybean screw oil press includes a soybean conveying cylinder, an oil pressing outer cylinder, and a soybean meal discharge cylinder connected in sequence. A pressing spiral shaft is rotatably installed in each of the three cylinders. A power assembly is connected to the outer end of the pressing spiral shaft. Both ends of the oil pressing outer cylinder connected to the soybean conveying cylinder and the soybean meal discharge cylinder are equipped with ring discs. Multiple radially arranged limiting grooves are evenly opened on the opposite sides of the two ring discs. A pressing bar, aligned with each limiting groove, is arranged between the two ring discs. Each end of the pressing bar has a slider adapted to the limiting groove, and a spring is installed between the slider and the limiting groove. Each pressing bar has multiple inclined pressing grooves on its radial outer surface. All pressing bars are fitted with an inner inclined pressing ring equal in number to the inclined pressing grooves. The inner inclined surface of the inner pressing ring is fitted and pressed against the inclined pressing grooves. A transmission screw and a horizontal slide bar parallel to the pressing bar are arranged between the two ring discs. An adjustment component for driving the transmission screw is provided on the outer cylinder of the oil pressing bar. The outer circular surface of the inner inclined pressing ring is provided with a screw hole block that interacts with the transmission screw and a slide hole block that interacts with the horizontal slide bar.

[0007] As a further feature of the above scheme, connecting cylinders are concentrically fixed on both ends of the outer cylinder of the oil press. The outer ends of the two connecting cylinders are respectively connected to the soybean conveying cylinder and the soybean meal discharge cylinder through flanges. Two ring discs are respectively set at the inner ends of the two connecting cylinders.

[0008] As a further feature of the above scheme, each of the limiting slide grooves has a guide hole on its radial outer end wall, the slider is provided with a radial guide rod that interacts with the guide hole, and the spring is sleeved on the radial guide rod with its two ends connected to the slider and the radial outer end wall of the limiting slide groove, respectively.

[0009] As a further feature of the above scheme, the gap between two adjacent press bars is adjusted between 0.3 and 5 mm during the radial movement of the press bars along the limiting slide groove.

[0010] As a further feature of the above scheme, the transmission screw is rotatably disposed between the tops of the two annular discs, and the two horizontal slide rods are fixedly disposed on the front and rear sides of the lower end between the two annular discs.

[0011] As a further provision of the above scheme, the adjustment component includes a gearbox located at the top of the outer cylinder of the oil press, a drive gear is provided inside the gearbox, and an adjustment motor is connected to the drive gear. The end of the transmission screw is provided with a driven gear that meshes with the drive gear.

[0012] As a further provision of the above scheme, the extrusion spiral blade shaft includes a thin shaft section, a first gradient shaft section, a second gradient shaft section and a coarse shaft section connected in sequence. The thin shaft section is located in the soybean conveying cylinder, the first gradient shaft section and the second gradient shaft section are located in the outer cylinder of the oil pressing, and the coarse shaft section is located in the soybean meal discharge cylinder. Spiral blades are connected to the thin shaft section, the first gradient shaft section, the second gradient shaft section and the coarse shaft section.

[0013] As a further modification of the above scheme, the spiral blade adopts a constant pitch design or the portion corresponding to the first and second gradient shaft segments adopts a gradually decreasing pitch design.

[0014] As a further feature of the above scheme, a base and a control box are also included. The soybean conveying cylinder, the outer oil pressing cylinder, and the soybean meal discharge cylinder are all fixedly installed on the upper surface of the base. An oil collecting hopper is provided at the lower end of the outer oil pressing cylinder, and an oil guiding groove is provided on the upper surface of the base directly below the oil collecting hopper. A feeding hopper is connected to the upper end of the soybean conveying cylinder, and a soybean meal discharge guide groove is provided directly below the end of the soybean meal discharge cylinder.

[0015] As a further provision of the above scheme, the power assembly includes a power motor, and the outer ends of the output shaft of the power motor and the extrusion spiral blade shaft are respectively provided with a driving pulley and a driven pulley, and a transmission belt is provided between the driving pulley and the driven pulley.

[0016] When the soybean screw oil press disclosed in this invention experiences poor oil extraction and a high oil content in the extruded soybean meal, it can be clearly determined that the gaps between the press bars are blocked, requiring unblocking and cleaning. During the unblocking and cleaning process, the feeding of soybeans is first paused, and the machine is allowed to idle for a period to assess the internal material condition. Then, the control and adjustment components are activated, causing the transmission screw to rotate forward a certain angle and number of revolutions. Through the interaction between the transmission screw and the screw hole block, all the inner inclined pressure rings inside the outer cylinder of the oil press can be driven to move axially. During the axial movement of the inner inclined pressure rings, the position of the inner inclined surface mates with the inclined pressure grooves on the press bars changes, and under the action of the springs, all the press bars move radially outward synchronously, widening the gaps between the two press bars.

[0017] After the oil outlet gap between the pressing bars is adjusted to be larger, the adjusting component is then controlled to reverse, thus reducing the gap between the two pressing bars. Repeating this process several times will cause the gap between adjacent pressing bars to continuously increase and decrease, accelerating the discharge of blockage material from the oil outlet gap and quickly clearing the entire oil pressing gap. Once cleared, all pressing bars are moved back to their original position, and the oil outlet gap is controlled between 0.4 and 0.6 mm before normal operation resumes. There is no need to disassemble the entire screw oil press for cleaning.

[0018] Furthermore, this application further improves the design of the traditional extrusion spiral blade shaft. The thin shaft section in the soybean conveying cylinder can realize the normal conveying and propulsion of soybean fragments. During operation, the design of the first and second gradient shaft sections inside the oil pressing outer cylinder allows the soybean fragments in the pressing cage to be pressed once by the first gradient shaft section before entering the second gradient shaft section. At this time, the soybean fragments that were originally compressed will enter a larger space, which can realize the disordered tumbling of the material. The tumbled material will be pressed a second time under the action of the second gradient shaft section, so that the soybean fragments are squeezed and pressed again after changing their state, so that the residual oil in the soybean fragments can be fully squeezed out, and the oil in the soybeans can be fully extracted.

[0019] Compared with the prior art, the present invention has the following beneficial effects: This invention discloses a soybean screw oil press that changes the traditional design of fixedly installing the pressing bars in the pressing chamber. It utilizes the interaction of a slider, spring, and limiting groove to enable radial movement of the pressing bars within the chamber. An inclined pressing groove is created on the pressing bar, engaging with an inner inclined pressing ring. The axial movement of the inner inclined pressing ring then restricts the position of the pressing bars, allowing for control and adjustment of the oil outlet gaps. When the oil outlet gaps become clogged, the radial reciprocating movement of the pressing bars can be controlled to continuously change the size of the gaps, allowing the material blocking the gaps to be quickly cleared. This achieves online rapid unblocking and cleaning of the entire soybean screw oil press.

[0020] The present invention further improves the design of the extrusion spiral blade shaft in the frying chamber by making a two-stage gradient shaft, so that during the soybean oil pressing process, the material of soybeans before the second pressing after the first pressing can break the material state of the first pressing, so that it can be disorderly turned and adjusted before being pressed and squeezed for the second time, thereby enabling the residual oil in the soybean fragments to be fully pressed and squeezed out, and realizing the full extraction of oil from soybeans. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the internal three-dimensional structure of the outer cylinder of the oil press in this invention; Figure 3This is a schematic diagram of the three-dimensional structure of the annular disc, transmission screw, and inner inclined pressing ring in this invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the pressing bar, slider, etc. in this invention; Figure 5 For the present invention Figure 2 Enlarged structural diagram at point A in the diagram; Figure 6 For the present invention Figure 4 Enlarged structural diagram at point B in the diagram; Figure 7 This is a three-dimensional structural diagram of the extrusion spiral blade shaft in Embodiment 2 of the present invention. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-7 This application will be described in detail with reference to the embodiments. Example 1

[0025] Example 1 discloses a fast-unclogging soybean screw oil press, see attached drawing. Figure 1 The system includes a base 1 and a control box 2. The control box 2 is located at the front end of the upper surface of the base 1, and a vertical plate 3 is fixedly installed at both ends of the upper surface of the base 1 behind the control box 2. A soybean conveying cylinder 4 and a soybean meal discharge cylinder 5 are respectively fixedly connected to the top of the two vertical plates 3, and an oil pressing outer cylinder 6 is installed between the soybean conveying cylinder 4 and the soybean meal discharge cylinder 5. An oil collecting hopper 7 is installed at the lower end of the oil pressing outer cylinder 6, and an oil guiding groove 8 is installed on the upper surface of the base 1 directly below the oil collecting hopper 7. A feeding hopper 9 is connected to the upper end of the soybean conveying cylinder 4, and a soybean meal discharge guide groove 10 is installed directly below the end of the soybean meal discharge cylinder 5.

[0026] Reference Appendix Figures 2-4Connecting cylinders 11 are concentrically fixed on both the left and right ends of the outer cylinder 6 of the oil pressing body. A first flange 12 is connected to the outer end of each connecting cylinder 11. A second flange 13, connected to the first flange 12, is provided at the ends of both the soybean conveying cylinder 4 and the soybean meal discharging cylinder 5, allowing for a detachable connection between the soybean conveying cylinder 4 and the soybean meal discharging cylinder 5 and the connecting cylinder 11 via flanges. An annular disc 14 is connected to the inner end of each of the two connecting cylinders 11. 18 to 32 radially arranged limiting grooves 141 are evenly distributed on the opposite sides of the two annular discs 14, and guide holes 142 are provided on the radially outer end wall of each limiting groove 141.

[0027] Press bars 15 are evenly arranged in a ring array between two annular discs 14, aligned front and back with each limiting slide groove 141. Each press bar 15 has a slider 16 at both ends that matches the limiting slide groove 141. A radial guide rod 17 is also provided on the slider 16, extending radially into the corresponding guide hole 142. A spring 18 is fitted on the radial guide rod 17, with both ends of the spring 18 connected to the outer radial end wall of the slider 16 and the limiting slide groove 141, respectively. When 18 to 32 press bars 15 are arranged in a ring array between the two annular discs 14, and the sliders 16 at both ends interact with the limiting slide groove 141, the gap between two adjacent press bars 15 can be adjusted between 0.3 and 5 mm. This adjustment is achieved by synchronously controlling all press bars 15 to move radially along the limiting slide groove 141. When normally used for pressing soybean scraps for oil, the gap between two adjacent press bars 15 should be controlled between 0.4 and 0.6 mm.

[0028] In the specific design, 2 to 4 inclined pressing grooves 151 are opened on the radial outer surface of each pressing bar 15, and then an inner inclined pressing ring 19, equal in number to the inclined pressing grooves 151, is fitted around the periphery of all pressing bars 15. (See attached image) Figure 3 and attached Figure 4 As shown, in this embodiment 1, two inclined pressing grooves 151 are opened on each pressing bar 15, and two inner inclined pressing rings 19 are arranged between the two ring discs 14, and the inner inclined surface of the inner inclined pressing ring 19 is pressed and attached to the inclined pressing groove 151.

[0029] A transmission screw 20 is provided between the tops of the two annular discs 14, and both ends of the transmission screw 20 are rotatably connected to the annular discs 14 via bearings. An adjusting assembly 21 for driving the transmission screw 20 is also provided at the top of the outer cylinder 6. Horizontal sliding rods 22, parallel to the transmission screw 20, are fixed on both the front and rear sides of the lower end between the two annular discs 14. A screw hole block 191 interacting with the transmission screw 20 and two sliding hole blocks 192 interacting with the horizontal sliding rods 22 are provided on the outer circumference of each inner inclined pressing ring 19. In the specific design, the adjustment component 21 includes a gearbox 211 connected to the top of the outer cylinder 6 of the oil press. The gearbox 211 is equipped with a drive gear 212 inside, and an adjustment motor 213 connected to the drive gear 212 is provided on the outer end face of the gearbox 211. Then, a driven gear 214 that meshes with the drive gear 212 is provided at the end of the transmission screw 20. The drive gear 212 extends into the inner cylinder 6 of the oil press and meshes with the driven gear 214.

[0030] Finally, an extrusion spiral shaft 23 is concentrically arranged in the soybean conveying cylinder 4, the oil pressing outer cylinder 6, and the soybean meal discharge cylinder 5. A power assembly is connected to the outer end of the extrusion spiral shaft 23 extending out of the soybean conveying cylinder 4. The power assembly includes a power motor 24 fixed on the upper surface of the base 1. A drive pulley and a driven pulley are respectively arranged on the outer ends of the power motor 24 and the extrusion spiral shaft 23 extending out of the soybean conveying cylinder 4, and a transmission belt 25 is arranged between the drive pulley and the driven pulley.

[0031] In the operation of the soybean screw oil press disclosed in Embodiment 1, the extrusion screw shaft 23 rotates within the soybean conveying cylinder 4, the outer oil pressing cylinder 6, and the soybean meal discharge cylinder 5 under the action of the power component. Under the action of the extrusion screw shaft 23, the crushed soybeans in the feeding hopper 9 are conveyed from left to right. When the crushed soybeans are conveyed into the outer oil pressing cylinder 6, the spiral space formed by the extrusion screw shaft 23 and all the pressing bars 15 gradually decreases, thereby compressing the crushed soybeans. Under the action of the compressive force, the soybean oil in the soybeans is squeezed out and flows out through the gap between two adjacent pressing bars 15, then enters the outer oil pressing cylinder 6, and is finally discharged into the oil guide trough 8 by the oil collection hopper 7, where it is collected in a directional manner. The soybean meal after the soybean oil is squeezed out enters the soybean meal discharge cylinder 5 and is finally discharged from the outlet of the soybean meal discharge cylinder 5, where it is collected in a directional manner by the soybean meal discharge guide trough 10.

[0032] When the soybean screw oil press is not producing oil smoothly and the extracted soybean meal has a high oil content, it indicates that the gap between the two pressing bars 15 is blocked and needs to be cleared in time. At this time, stop adding crushed soybeans and let the extrusion screw shaft 23 continue to rotate for a period of time to send out all the internal material. Then start the adjustment component 21 to make the transmission screw 20 rotate forward a certain number of times or angles. Under the action of the transmission screw 20 and the screw hole block 191, the two inner inclined pressing rings 19 in the outer cylinder 6 will move a certain distance in the same direction. During the axial movement of the inner inclined pressing rings 19, through the cooperation of its inner inclined surface and the inclined pressing groove 151, and the force of the spring 18 between each slider 16 and the limiting groove 141, all pressing bars 15 will first move radially outward. During the radial movement, the gap between two adjacent pressing bars 15 will increase.

[0033] Subsequently, the transmission screw 20 is controlled to rotate in the opposite direction at a certain angle, causing the gap between two adjacent pressing bars 15 to narrow again. After repeating this operation several times, the gap between two adjacent pressing bars 15 will continuously move back and forth between widening and narrowing, thereby accelerating the rapid discharge of blockage material in the gap and quickly clearing the entire oil pressing gap. After clearing is completed, all pressing bars 15 can be moved and reset to normal operation again without the need to disassemble the entire screw oil press for cleaning. Example 2

[0034] Example 2 discloses a soybean screw oil press that further optimizes the design based on the technical solution in Example 1. The similarities with Example 1 will not be described again. The difference lies in the structural design of the extrusion screw shaft 23.

[0035] Reference Appendix Figure 7 In this embodiment 2, the extrusion spiral blade 23 includes a thin shaft section 231 located in the soybean conveying cylinder 4, a first gradient shaft section 232 and a second gradient shaft section 233 located in the oil pressing outer cylinder 6, and a coarse shaft section 234 located in the discharge cylinder 5.

[0036] The first and second gradient shaft sections 232 and 233 both have diameters that gradually increase from left to right and are connected end-to-end. The thin shaft section 231 is connected to the left end of the first gradient shaft section 232, and the thick shaft section 234 is connected to the right end of the second gradient shaft section 233. The right end of the thick shaft section 234 is shaped like a frustum to fit with the soybean meal discharge cylinder 5, thus forming a discharge annular gap for forming soybean cake. Finally, an integral spiral blade 235 is provided on the entire extrusion spiral shaft 23. This spiral blade 235 can have a constant pitch design, or the portion corresponding to the first and second gradient shaft sections 232 can be designed with a gradually decreasing pitch. This ensures that during the rotation of the extrusion spiral shaft 23, a sufficient extrusion ratio is provided to the internal soybean fragments, fully squeezing out the oil from the soybean fragments.

[0037] In this embodiment 2, through the structural design of the first gradient shaft section 232 and the second gradient shaft section 233, the soybean fragments in the press cage are first pressed in the first gradient shaft section 232 and then enter the interior of the second gradient shaft section 233. At this time, the soybean fragments that were originally squeezed enter an enlarged space, which can realize the disordered turning of the material. The turned material will be pressed a second time under the action of the second gradient shaft section 233, so that the soybean fragments are squeezed and pressed again after changing state, so that the residual oil in the soybean fragments is fully squeezed out, and the oil in the soybeans is fully extracted.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fast-draining soybean screw oil press, comprising a soybean conveying cylinder, an oil pressing outer cylinder, and a soybean meal discharge cylinder connected in sequence, wherein an extrusion screw shaft is rotatably arranged in the soybean conveying cylinder, the oil pressing outer cylinder, and the soybean meal discharge cylinder, and a power assembly is connected to the outer end of the extrusion screw shaft, characterized in that, Both ends of the outer cylinder of the oil press are connected to the soybean conveying cylinder and the soybean meal discharge cylinder. A ring disc is provided at both ends. Multiple radially arranged limiting grooves are evenly opened on the opposite sides of the two ring discs. A pressing bar is provided between the two ring discs, which is aligned with the front and back of each limiting groove. Both ends of the pressing bar are provided with sliders that are adapted to the limiting grooves. A spring is provided between the sliders and the limiting grooves. Each pressing bar has multiple inclined pressing grooves on its radial outer surface. All pressing bars are fitted with an inner inclined pressing ring equal in number to the inclined pressing grooves. The inner inclined surface of the inner pressing ring is fitted and pressed against the inclined pressing grooves. A transmission screw and a horizontal slide bar parallel to the pressing bar are arranged between the two ring discs. An adjustment component for driving the transmission screw is provided on the outer cylinder of the oil pressing bar. The outer circular surface of the inner inclined pressing ring is provided with a screw hole block that interacts with the transmission screw and a slide hole block that interacts with the horizontal slide bar.

2. The rapid unblocking soybean screw oil press according to claim 1, characterized in that, Both ends of the outer cylinder of the oil press are concentrically fixed with connecting cylinders. The outer ends of the two connecting cylinders are respectively connected to the soybean conveying cylinder and the soybean meal discharge cylinder through flanges. Two ring discs are respectively set at the inner ends of the two connecting cylinders.

3. The rapid unblocking soybean screw oil press according to claim 1, characterized in that, Each of the limiting slide grooves has a guide hole on its radial outer end wall, and the slider is provided with a radial guide rod that interacts with the guide hole. The spring is sleeved on the radial guide rod and its two ends are respectively connected to the slider and the radial outer end wall of the limiting slide groove.

4. The rapid unblocking soybean screw oil press according to claim 1, characterized in that, As the press bars move radially along the limiting slide groove, the gap between two adjacent press bars is adjusted between 0.3 and 5 mm.

5. The rapid unblocking soybean screw oil press according to claim 1, characterized in that, The transmission screw is rotatably mounted between the tops of the two annular discs, and the two horizontal slide rods are fixedly mounted on the front and rear sides of the lower end between the two annular discs.

6. The rapid unblocking soybean screw oil press according to claim 5, characterized in that, The adjustment assembly includes a gearbox located at the top of the outer cylinder of the oil press, a drive gear inside the gearbox, and an adjustment motor connected to the drive gear. The end of the transmission screw is provided with a driven gear that meshes with the drive gear.

7. The rapid unblocking soybean screw oil press according to claim 1, characterized in that, The extrusion spiral blade includes a thin shaft section, a first gradient shaft section, a second gradient shaft section, and a coarse shaft section connected in sequence. The thin shaft section is located in the soybean conveying cylinder, the first gradient shaft section and the second gradient shaft section are located in the outer cylinder of the oil pressing, and the coarse shaft section is located in the soybean meal discharge cylinder. Spiral blades are connected to the thin shaft section, the first gradient shaft section, the second gradient shaft section, and the coarse shaft section.

8. The rapid unblocking soybean screw oil press according to claim 7, characterized in that, The spiral blades adopt a constant pitch design or the portions corresponding to the first and second gradient shaft sections adopt a gradually decreasing pitch design.

9. The rapid unblocking soybean screw oil press according to claim 1, characterized in that, It also includes a base and a control box. The soybean conveying cylinder, the oil pressing outer cylinder and the soybean meal discharge cylinder are all fixedly installed on the upper surface of the base. An oil collecting hopper is provided at the lower end of the oil pressing outer cylinder. An oil guiding groove is provided on the upper surface of the base directly below the oil collecting hopper. A feeding hopper is connected to the upper end of the soybean conveying cylinder. A soybean meal discharge guide groove is provided directly below the end of the soybean meal discharge cylinder.

10. The rapid unblocking soybean screw oil press according to claim 1, characterized in that, The power assembly includes a power motor, and the outer ends of the output shaft of the power motor and the extrusion spiral blade shaft are respectively provided with a driving pulley and a driven pulley, and a transmission belt is provided between the driving pulley and the driven pulley.

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