Soybean oil leaching process and equipment thereof

Abstract

The invention discloses a soybean oil leaching process and equipment thereof in the technical field of soybean oil processing, the equipment comprises a leaching pipe, the leaching pipe is a round long pipe, a discharging pipe and a feeding pipe are installed at the two ends of the leaching pipe respectively, a feeding threaded rod is arranged between the discharging pipe and the feeding pipe in a penetrating mode, and a feeding assembly is arranged on the feeding threaded rod; the feeding assembly can drive soybean cake raw materials to penetrate through the leaching pipe from the feeding pipe to enter the discharging pipe, the soybean cake raw materials are automatically extruded and stirred in the moving process, the leaching pipe is divided into multiple stages of leaching bins through middle partition plates, each leaching bin comprises a spraying assembly, and a material guiding assembly is arranged between every two adjacent leaching bins; according to the invention, a concentration gradient is formed through the opposite directions of a fresh solvent and a soybean cake to optimize the extraction effect, and the material guide paths of the soybean cake and the solvent are simplified, so that the possibility that soybean residues remain in the equipment is reduced under the condition that the solvent is in full contact with the soybean cake, and the extraction efficiency is improved. And the feeding and discharging processes of the soybean cakes are simplified.

Description

Technical Field

[0001] The invention relates to the technical field of soybean oil processing, in particular to a soybean oil extraction process and equipment thereof. Background Art

[0002] The soybean oil extraction process involves feeding the ground soybean cake into a steamer, where it is steamed using high-temperature, high-pressure steam. The purpose of steaming is to increase the moisture content of the soybean cake, facilitating extraction. The steamed soybean cake is then fed into an extraction device, where it is immersed in an organic solvent, extracting the soybean oil at a specific time and temperature.

[0003] In existing leaching equipment, soybean cake is generally fed directly into the equipment to ensure sufficient contact between the soybean cake and the solvent. During the leaching process, soybean cake particle residue will inevitably remain in the equipment, which is very difficult to clean and can easily cause blockage of the equipment over time. After the leaching process, the unloading and collection of soybean cake before and after feeding are very cumbersome, resulting in low processing efficiency. Summary of the Invention

[0004] The technical problem of the present invention is to provide a soybean oil extraction process and equipment thereof, as well as to optimize the extraction effect by forming a concentration gradient through the opposite directions of fresh solvent and soybean cake, and by simplifying the material guide path of soybean cake and solvent, while ensuring full contact between solvent and soybean cake, reduce the possibility of soybean residue remaining inside the equipment, and simplify the soybean cake loading and unloading process.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a soybean oil extraction device, comprising an extraction pipe, wherein the extraction pipe is a long circular pipe with a discharge pipe and a feed pipe respectively installed at both ends, a feeding threaded rod is provided between the discharge pipe and the feed pipe, and a feeding assembly is provided on the feeding threaded rod, wherein the feeding assembly can drive the soybean cake raw material from the feed pipe through the extraction pipe into the discharge pipe, and automatically squeeze and stir the soybean cake raw material during the movement, wherein the extraction pipe is divided into multiple extraction bins by a middle partition, and the extraction bins include:

[0006] A spray assembly is located above the leaching bin. The leaching bin is divided into a primary leaching bin, a secondary leaching bin, and a tertiary leaching bin in the order from the feed pipe to the discharge pipe. A material guide assembly is provided between adjacent leaching bins. The material guide assembly can guide the mixed oil at the bottom of the lower leaching bin into the upper leaching bin.

[0007] The material retaining net is located at the lower end of the leaching tube. Both ends of the material retaining net are provided with material collecting components, and the material collecting components can push out the particles accumulated on the material retaining net.

[0008] As a further solution of the present invention, the material collecting assembly includes a side mounting plate and a side connecting column, the side mounting plate is fixedly clamped at both ends of the leaching tube, the side connecting column is provided with two groups and both are fixedly mounted between the side mounting plates, the material blocking net is connected between the side connecting columns, the middle partition is slidably connected between the side connecting columns, a through groove is provided on the middle partition, the material blocking net passes through the through groove, an internal threaded rod is rotatably installed between the two ends of the side connecting column, the internal threaded rod is threadedly connected to the middle partition, a first motor is fixedly mounted on the side mounting plate, and the output end of the first motor is fixedly connected to the internal threaded rod.

[0009] As a further solution of the present invention, the spray assembly includes an upper mounting plate, which is fixedly mounted on the upper end of the leaching tube, and multiple groups of rotating tubes are rotatably connected on the upper side of the upper mounting plate corresponding to the first-stage leaching bin, the second-stage leaching bin and the third-stage leaching bin, and multiple groups of internal spray nozzles are fixedly mounted on the lower surface of the rotating tube, and an inlet tube group is provided at the upper end of the rotating tube, and the upper end of the inlet tube group is led out from the upper end of the leaching tube, and a positioning block is fixedly mounted at the middle position of the upper end of each group of the rotating tubes, and sliding blocks are slidably connected to the positions of the upper surface of the upper mounting plate corresponding to the two ends of the rotating tube, and limiting partitions are provided on both sides of the sliding block corresponding to the positioning block, and a cylinder is fixedly mounted on the position of the leaching tube corresponding to the sliding block, and the output end of the cylinder passes through the leaching tube and is fixedly connected to the sliding block.

[0010] As a further solution of the present invention, the feeding assembly includes a feeding rack, both ends of the feeding rack are threadedly connected to the feeding threaded rod, a penetration hole is opened on the feeding rack, and a retaining ring is provided on the upper surface of the feeding rack corresponding to the edge of the penetration hole, both sides of the retaining ring are rotatably connected with an inner movable threaded rod, and the inner movable threaded rod is threadedly connected with a connecting seat, one end of the connecting seat extends into the retaining ring and an extrusion roller is rotatably installed therebetween, a grinding bump is fixedly installed on the outer surface of the extrusion roller, a bidirectional motor is fixed at both ends of the retaining ring, and the output end of the bidirectional motor is fixedly connected to the inner movable threaded rod.

[0011] As a further solution of the present invention, the material guide assembly includes a liquid outlet nozzle and an outlet pipe, the liquid outlet nozzle is fixedly installed at the bottom of the leaching tank, the bottom of the liquid outlet nozzle is fixedly connected to the lower end of the outlet pipe, and a regulating valve is fixedly installed at the upper end of the outlet pipe, and the upper end of the regulating valve is connected to the inlet pipe group of the upper-level leaching tank.

[0012] As a further solution of the present invention, a rotating frame is rotatably installed on the upper ends of the discharge pipe and the feed pipe, a mounting cover is fixedly installed on the upper end of the rotating frame, a plurality of end spray parts are fixedly installed on the lower surface of the mounting cover, and a liquid inlet pipe is fixedly connected above the mounting cover above the discharge pipe, and fresh solvent can enter the end spray part through the liquid inlet pipe.

[0013] As a further solution of the present invention, a rotating motor is fixedly installed on the outside of the feed pipe, the output end of the rotating motor is fixedly connected to the feeding threaded rod, the liquid outlet nozzle at the bottom of the first-stage leaching tank is fixedly connected to the end spray piece above the feed pipe through the outlet pipe, and the bottom of the discharge pipe is fixedly connected to the inlet pipe group above the third-stage leaching tank through the outlet pipe.

[0014] A soybean oil extraction process, the specific steps of the soybean oil extraction process are as follows:

[0015] Step 1: Open the installation cover and place the soybean cake into the loading rack on the feed pipe;

[0016] Step 2: Turn on the rotating motor to drive the feeding rack into the first-stage leaching bin through the feeding threaded rod, and the spray component sprays the high-concentration mixed oil into the first-stage leaching bin;

[0017] Step 3: The feeding screw rod drives the feeding rack to pass through the secondary leaching bin and the tertiary leaching bin and enter the discharge pipe in sequence;

[0018] Step 4: Fresh solvent enters the end spray piece of the discharge pipe through the liquid inlet pipe and is sprayed out.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, during the step-by-step extraction process, the soybean cake material is always on the loading rack, and is moved between each leaching bin, the discharge pipe and the feed pipe by the loading rack, so that the soybean cake material is conveniently loaded and unloaded. During the movement, the solvent is fully contacted with the soybean cake by spraying and stirring of the loading rack, and the soybean cake does not need to be scattered and contact the inner wall of the leaching tube, thereby avoiding the possibility of soybean cake particles remaining in the leaching tube. The material retaining net between the loading rack and the material guide component can block the fallen soybean cake particles, thereby preventing the soybean cake particles from entering the circulating solvent, ensuring that the solvent will not be mixed with more foreign matter during the extraction process, ensuring the purity of the solvent, and thus ensuring that the solvent and the soybean cake are fully in contact, ensuring that the solvent and the soybean cake can have a separate circulation system, and facilitating the introduction and export of the solvent and the soybean cake material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a cross-sectional view of the structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 A partial schematic diagram of the structure at point A;

[0025] Figure 4 This is a formal diagram of the structural cross-sectional view of the present invention;

[0026] Figure 5 The structure of the present invention is cut away Figure 2 ;

[0027] Figure 6 It is a structural schematic diagram of the feeding assembly in the present invention;

[0028] Figure 7 Schematic diagram of the structure of the spray assembly in the present invention;

[0029] Figure 8 For the present invention Figure 7 A partial schematic diagram of the structure at B in the middle;

[0030] Figure 9 It is a process flow chart of the present invention.

[0031] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0032] 1. Leaching pipe; 2. Discharge pipe; 3. Feed pipe; 4. Rotating motor; 5. Mounting cover; 6. Rotating frame; 7. End spray piece; 8. Liquid inlet pipe; 9. Cylinder; 10. Inlet pipe group; 11. Regulating valve; 12. Discharge pipe; 13. Liquid outlet nozzle; 14. Feeding threaded rod; 15. Upper mounting plate; 16. Feeding frame; 17. Material retaining net; 18. Side mounting plate; 19. Side connecting column; 20. Middle partition; 21. Through groove; 22. Squeeze roller; 23. Inner movable threaded rod; 24. Permeation hole; 25. Retaining ring; 26. Rotating pipe; 27. Inner spray nozzle; 28. Sliding block; 29. Positioning block; 30. Limiting partition. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] See also Figures 1-9 The present invention provides a technical solution: a soybean oil extraction device, including an extraction tube 1, the extraction tube 1 is a long circular tube and is respectively provided with a discharge tube 2 and a feed tube 3 at both ends, a feeding threaded rod 14 is provided between the discharge tube 2 and the feed tube 3, and a feeding assembly is provided on the feeding threaded rod 14, which can drive the soybean cake raw material from the feed tube 3 through the extraction tube 1 into the discharge tube 2, and automatically squeeze and stir the soybean cake raw material during the movement, the extraction tube 1 is divided into multiple extraction bins by a middle partition 20, and the extraction bin includes:

[0035] The spray assembly is located above the leaching bin. The leaching bin is divided into a primary leaching bin, a secondary leaching bin and a tertiary leaching bin in the order from the feed pipe 3 to the discharge pipe 2. A material guide assembly is provided between adjacent leaching bins. The material guide assembly can guide the mixed oil at the bottom of the next leaching bin into the previous leaching bin.

[0036] The material retaining net 17 is located at the lower end of the leaching tube 1 , and material collecting components are provided at both ends of the material retaining net 17 , which can push out the particles accumulated on the material retaining net 17 .

[0037] During operation, the soybean cake made of soybean crushed material in the present invention is placed on the feeding assembly through the feed pipe 3. The soybean cake on the feeding assembly is first sprayed with high-concentration mixed oil in the feed pipe 3, and then enters the leaching pipe 1 under the rotation of the feeding threaded rod 14, and then passes through the first-level leaching bin, the second-level leaching bin and the third-level leaching bin of the leaching pipe 1 in turn, and finally enters the discharge pipe 2. The soybean cake in the discharge pipe 2 is sprayed with fresh solvent, that is, the concentration of the solvent sprayed from the discharge pipe 2 and the feed pipe 3 gradually increases. The fresh solvent is introduced from the upper end of the discharge pipe 2, and after contacting and leaching with the soybean cake under the action of the material guide assembly, it enters the third-level leaching bin, the second-level leaching bin and the first-level leaching bin in turn, and is finally sprayed out from the upper end of the feed pipe 3. The fresh solvent and the soybean cake material are in opposite directions, so that the high-concentration mixed oil contacts the new soybean material end in advance, and the dilute concentration mixed oil circulates. Spraying forms a concentration gradient to optimize the extraction effect. In this step-by-step extraction process, the soybean cake material is always on the loading rack 16, and is moved between each leaching bin, the discharge pipe 2 and the feed pipe 3 through the loading rack 16, which is convenient for loading and unloading the soybean cake material. During the movement, the solvent is fully contacted with the soybean cake through spraying and stirring of the loading rack 16, and the soybean cake does not need to be scattered and contact the inner wall of the leaching tube 1, avoiding the possibility of soybean cake particles remaining in the leaching tube 1, and the material blocking net 17 between the loading rack 16 and the material guide component can block the fallen soybean cake particles to prevent soybean cake particles from entering the circulating solvent, ensuring that the solvent will not be mixed with more foreign matter during the extraction process, ensuring the purity of the solvent, and thus ensuring that the solvent is fully in contact with the soybean cake, ensuring that the solvent and soybean cake can have a separate circulation system, facilitating the import and export of the solvent and soybean cake material.

[0038] As a further solution of the present invention, the material collecting assembly includes a side mounting plate 18 and a side connecting column 19. The side mounting plate 18 is fixedly clamped at both ends of the leaching tube 1. Two groups of side connecting columns 19 are provided and are fixedly mounted between the side mounting plates 18. The material retaining net 17 is connected between the side connecting columns 19. The middle partition 20 is slidably connected between the side connecting columns 19. A through groove 21 is provided on the middle partition 20. The material retaining net 17 passes through the through groove 21. An internal threaded rod is rotatably installed between the two ends of the side connecting column 19. The internal threaded rod is threadedly connected to the middle partition 20. A first motor is fixedly mounted on the side mounting plate 18, and the output end of the first motor is fixedly connected to the internal threaded rod.

[0039] During operation, the falling soybean cake particles in the present invention are blocked by the retaining net 17 to prevent the particles from falling directly into the circulating solvent, thereby reducing the possibility of the solvent being mixed with impurities. Most of the fallen particles and impurities remain on the retaining net 17. The first motor drives the internal threaded rod to rotate, so that the middle partition 20 on the internal threaded rod moves toward the side mounting plate 18, thereby pushing the particle impurities on the retaining net 17 to the two ends of the leaching pipe 1, making it convenient for users to clean the inside of the leaching equipment.

[0040] As a further solution of the present invention, the spray assembly includes an upper mounting plate 15, which is fixedly mounted on the upper end of the leaching pipe 1. Multiple groups of rotating tubes 26 are rotatably connected to the upper parts of the upper mounting plate 15 corresponding to the first-stage leaching bin, the second-stage leaching bin and the third-stage leaching bin. Multiple groups of internal spray nozzles 27 are fixedly mounted on the lower surface of the rotating tube 26. An inlet tube group 10 is provided at the upper end of the rotating tube 26. The upper end of the inlet tube group 10 is led out from the upper end of the leaching pipe 1. A positioning block 29 is fixedly mounted at the middle position of the upper end of each group of rotating tubes 26. Sliding blocks 28 are slidably connected to the positions of the upper surface of the upper mounting plate 15 corresponding to the two ends of the rotating tube 26. Limiting partitions 30 are provided on both sides of the sliding block 29 corresponding to the positioning block 29. A cylinder 9 is fixedly mounted on the position of the sliding block 28 on the leaching pipe 1, and the output end of the cylinder 9 passes through the leaching pipe 1 and is fixedly connected to the sliding block 28.

[0041] During operation, the present invention drives the sliding block 28 to slide through the cylinder 9, drives the limiting partition 30 to move through the sliding of the sliding block 28, pushes the positioning block 29 through the limiting partition 30, and then drives the rotating tube 26 to rotate on the upper mounting plate 15 through the movement of the positioning block 29, and drives the internal spray part 27 to rotate through the rotation of the rotating tube 26, so that the solvent can be sprayed more evenly on the soybean cake on the surface of the loading rack 16.

[0042] As a further solution of the present invention, the feeding assembly includes a feeding rack 16, both ends of which are threadedly connected to the feeding threaded rod 14, a penetration hole 24 is opened on the feeding rack 16, and a retaining ring 25 is provided on the upper surface of the feeding rack 16 corresponding to the edge of the penetration hole 24, both sides of the retaining ring 25 are rotatably connected to the inner movable threaded rod 23, and the inner movable threaded rod 23 is threadedly connected to a connecting seat, one end of the connecting seat extends into the retaining ring 25 and an extrusion roller 22 is rotatably installed therebetween, and a grinding bump is fixedly installed on the outer surface of the extrusion roller 22, and a bidirectional motor is fixed at both ends of the retaining ring 25, and the output end of the bidirectional motor is fixedly connected to the inner movable threaded rod 23.

[0043] During operation, the soybean cake of the present invention is spread on the surface of the loading rack 16, and the solvent is sprayed on the loading rack 16. The solvent contacts, leaches, and extracts the soybean particles to form a mixed solvent, which then falls from the body hole 24 and is guided from the liquid outlet 13 at the bottom of the leaching bin through the material blocking net 17 into the next leaching bin. During this process, the internal movable threaded rod 23 continuously rotates forward and backward, causing the squeezing roller 22 to slide between the retaining rings 25, and during the sliding process, the squeezing roller 22 is driven to rotate by the micro motor in the connecting seat. The rotation and reciprocating movement of the squeezing roller 22 make the solvent contact with the soybean particles more fully, thereby improving the mass transfer efficiency and the extraction effect.

[0044] As a further solution of the present invention, the material guide assembly includes a liquid outlet nozzle 13 and an outlet pipe 12. The liquid outlet nozzle 13 is fixedly installed at the bottom of the leaching tank, the bottom of the liquid outlet nozzle 13 is fixedly connected to the lower end of the outlet pipe 12, and the upper end of the outlet pipe 12 is fixedly installed with a regulating valve 11, and the upper end of the regulating valve 11 is connected to the inlet pipe group 10 of the upper-level leaching tank.

[0045] During operation, the solvent and the leaching oil in the present invention are mixed and fall into the liquid outlet nozzle 13 at the bottom of the leaching pipe 1, and are immersed into the outlet pipe 12 through the liquid outlet nozzle 13, and then immersed into the inlet pipe group 10 of the upper-level leaching bin through the outlet pipe group 10, and are sprayed into the leaching bin from the inner spray nozzle 27 of the rotating tube 26 through the outlet pipe group 10.

[0046] As a further solution of the present invention, a rotating frame 6 is rotatably installed on the upper ends of the discharge pipe 2 and the feed pipe 3, a mounting cover 5 is fixedly installed on the upper end of the rotating frame 6, and multiple groups of end spray parts 7 are fixedly installed on the lower surface of the mounting cover 5. A liquid inlet pipe 8 is fixedly connected above the mounting cover 5 above the discharge pipe 2, and fresh solvent can enter the end spray part 7 through the liquid inlet pipe 8.

[0047] During operation, the solvent in the discharge pipe 2 and the feed pipe 3 of the present invention is discharged through the end spraying member 7, and the installation cover 5 is convenient to open and close, thereby facilitating the feeding and unloading of the soybean cake material and the solvent.

[0048] As a further solution of the present invention, a rotating motor 4 is fixedly installed on the outside of the feed pipe 3, the output end of the rotating motor 4 is fixedly connected to the feeding threaded rod 14, the liquid outlet nozzle 13 at the bottom of the first-stage leaching tank is fixedly connected to the end spray piece 7 above the feed pipe 3 through the outlet pipe 12, and the bottom of the discharge pipe 2 is fixedly connected to the inlet pipe group 10 above the third-stage leaching tank through the outlet pipe 12.

[0049] During operation, the rotary motor 4 of the present invention drives the feeding threaded rod 14 to rotate, and the feeding rack 16 can be driven to move by the rotation of the feeding threaded rod 14 .

[0050] A soybean oil extraction process, the specific steps of the soybean oil extraction process are as follows:

[0051] Step 1: Open the installation cover 5 and place the soybean cake into the loading rack 16 in the feeding pipe 3;

[0052] Step 2: Turn on the rotating motor 4 to rotate and drive the feeding rack 16 into the primary leaching bin through the feeding threaded rod 14, and the spray component sprays the high-concentration mixed oil into the primary leaching bin;

[0053] Step 3: The feeding screw rod 14 drives the feeding rack 16 to pass through the secondary leaching bin and the tertiary leaching bin in sequence and enter the discharge pipe 2;

[0054] Step 4: Fresh solvent enters the end spraying part 7 of the discharge pipe 2 through the liquid inlet pipe 8 and is sprayed out.

[0055] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A soybean oil extraction device, comprising an extraction pipe (1), characterized in that: The leaching pipe (1) is a long circular pipe and is respectively provided with a discharge pipe (2) and a feed pipe (3) at both ends. A feeding threaded rod (14) is provided between the discharge pipe (2) and the feed pipe (3). A feeding assembly is provided on the feeding threaded rod (14). The feeding assembly can drive the soybean cake raw material from the feed pipe (3) through the leaching pipe (1) into the discharge pipe (2), and automatically squeezes and stirs the soybean cake raw material during the movement. The leaching pipe (1) is divided into multiple leaching bins by a middle partition (20). The leaching bin comprises: A spray assembly is located above the leaching bin, and the leaching bin is divided into a primary leaching bin, a secondary leaching bin, and a tertiary leaching bin in the order from the feed pipe (3) to the discharge pipe (2). A material guide assembly is provided between adjacent leaching bins, and the material guide assembly can guide the mixed oil at the bottom of the lower leaching bin into the upper leaching bin; A material retaining net (17) is located at the lower end of the leaching pipe (1), and material collecting components are provided at both ends of the material retaining net (17). The material collecting components can push out the particles accumulated on the material retaining net (17).

2. A soybean oil extraction equipment according to claim 1, characterized in that: The material receiving assembly includes a side mounting plate (18) and a side connecting column (19), the side mounting plate (18) is fixedly clamped at the two ends of the leaching tube (1), the side connecting column (19) is provided with two groups and both are fixedly mounted between the side mounting plates (18), the material retaining net (17) is connected between the side connecting columns (19), the middle partition (20) is slidably connected between the side connecting columns (19), a through groove (21) is provided on the middle partition (20), the material retaining net (17) passes through the through groove (21), an internal threaded rod is rotatably mounted between the two ends of the side connecting column (19), the internal threaded rod is threadedly connected to the middle partition (20), a first motor is fixedly mounted on the side mounting plate (18), and the output end of the first motor is fixedly connected to the internal threaded rod.

3. A soybean oil extraction equipment according to claim 2, characterized in that: The spray assembly comprises an upper mounting plate (15), the upper mounting plate (15) being fixedly mounted on the upper end of the leaching pipe (1), and a plurality of groups of rotating pipes (26) being rotatably connected above the upper mounting plate (15) corresponding to the first-stage leaching bin, the second-stage leaching bin and the third-stage leaching bin, a plurality of groups of internal spray nozzles (27) being fixedly mounted on the lower surface of the rotating pipe (26), an inlet pipe group (10) being provided at the upper end of the rotating pipe (26), the upper end of the inlet pipe group (10) being led out from the upper end of the leaching pipe (1), and each group of the rotating pipes (26) being provided with a plurality of internal spray nozzles (27) being fixedly mounted on the lower surface of the rotating pipe (26), A positioning block (29) is fixedly installed at the middle position of the upper end of the rotating tube (26); a sliding block (28) is slidably connected to the upper surface of the upper mounting plate (15) at positions corresponding to both ends of the rotating tube (26); a limiting partition (30) is provided on both sides of the sliding block (28) corresponding to the positioning block (29); a cylinder (9) is fixedly installed at a position corresponding to the sliding block (28) on the leaching tube (1); and an output end of the cylinder (9) passes through the leaching tube (1) and is fixedly connected to the sliding block (28).

4. A soybean oil extraction equipment according to claim 3, characterized in that: The feeding assembly comprises a feeding frame (16), both ends of the feeding frame (16) are threadedly connected to the feeding threaded rod (14), a penetration hole (24) is provided on the feeding frame (16), a retaining ring (25) is provided on the upper surface of the feeding frame (16) corresponding to the edge of the penetration hole (24), both sides of the retaining ring (25) are rotatably connected to the inner movable threaded rod (23), the inner movable threaded rod (23) is threadedly connected to a connecting seat, one end of the connecting seat extends into the retaining ring (25) and an extrusion roller (22) is rotatably installed therebetween, the outer surface of the extrusion roller (22) is fixedly installed with a grinding protrusion, a bidirectional motor is fixed at both ends of the retaining ring (25), and the output end of the bidirectional motor is fixedly connected to the inner movable threaded rod (23).

5. A soybean oil extraction equipment according to claim 4, characterized in that: The material guide assembly comprises a liquid outlet nozzle (13) and an outlet pipe (12); the liquid outlet nozzle (13) is fixedly mounted on the bottom of the leaching tank; the bottom of the liquid outlet nozzle (13) is fixedly connected to the lower end of the outlet pipe (12); a regulating valve (11) is fixedly mounted on the upper end of the outlet pipe (12); and the upper end of the regulating valve (11) is connected to the inlet pipe group (10) of the upper-level leaching tank.

6. A soybean oil extraction equipment according to claim 5, characterized in that: A rotating frame (6) is rotatably mounted on the upper ends of the discharge pipe (2) and the feed pipe (3); a mounting cover (5) is fixedly mounted on the upper end of the rotating frame (6); a plurality of end spraying parts (7) are fixedly mounted on the lower surface of the mounting cover (5); a liquid inlet pipe (8) is fixedly connected to the upper side of the mounting cover (5) above the discharge pipe (2); and fresh solvent can enter the end spraying part (7) through the liquid inlet pipe (8).

7. The soybean oil extraction equipment according to claim 5, characterized in that: A rotating motor (4) is fixedly installed on the outside of the feed pipe (3), and the output end of the rotating motor (4) is fixedly connected to the feeding threaded rod (14). The liquid outlet nozzle (13) at the bottom of the first-stage leaching tank is fixedly connected to the end spray piece (7) above the feed pipe (3) through the outlet pipe (12), and the bottom of the discharge pipe (2) is fixedly connected to the inlet pipe group (10) above the third-stage leaching tank through the outlet pipe (12).

8. A soybean oil extraction process, applicable to the soybean oil extraction equipment according to any one of claims 1 to 7, characterized in that: The specific steps of this soybean oil extraction process are as follows: Step 1: Open the installation cover (5) and place the soybean cake into the loading rack (16) of the feeding pipe (3); Step 2: Turn on the rotating motor (4) to rotate and drive the feeding rack (16) into the first-stage leaching bin through the feeding threaded rod (14), and the spray component sprays the high-concentration mixed oil into the first-stage leaching bin; Step 3: The feeding screw rod (14) drives the feeding rack (16) to sequentially pass through the secondary leaching bin and the tertiary leaching bin and enter the discharge pipe (2); Step 4: Fresh solvent enters the end spraying part (7) of the discharge pipe (2) through the liquid inlet pipe (8) and is sprayed out.

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