A double-screw oil press

Abstract

The application discloses a double-spiral oil material squeezing device and relates to the technical field of oil material squeezing devices.The double-spiral oil material squeezing device comprises a connected double cylinder, a screw rod combination and a discharging assembly.The connected double cylinder comprises an upper cylinder body and a lower cylinder body which are symmetrically arranged upward and downward, and the inside of the connected double cylinder is formed into a squeezing cavity after the upper cylinder body and the lower cylinder body are spliced and sealed; the squeezing cavity is provided with a plurality of double-spiral single channels and single-spiral double channels from an input end to an output end; the screw rod combination comprises a first screw rod and a second screw rod; the first screw rod comprises a first shaft rod, a plurality of wide screw propeller segments and a plurality of narrow screw propeller segments; one discharging assembly is correspondingly arranged at the positions of two material residue output ports of the connected double cylinder; and the input end of the connected double cylinder is provided with a driving assembly.The double-spiral oil material squeezing device can grade and squeeze materials through the multiple wide screw propeller segments and can push the materials through the multiple narrow screw propeller segments at different degrees of pushing force, so that the problems of the prior art, such as the unobvious material grading and squeezing effect and the incapability of effectively crushing materials, are solved.

Description

Technical Field

[0001] This invention belongs to the technical field of oilseed pressing equipment, and in particular relates to a double-screw oilseed pressing equipment. Background Technology

[0002] With changing lifestyles, people now mostly use vegetable oil for cooking. Vegetable oil is extracted by pressing oil from vegetable seeds (such as rapeseed, peanuts, soybeans, and sunflower seeds) using external force. The advantages of a twin-screw press include more thorough pressing, higher dehydration / oil yield, suitability for high-fiber / viscous materials, and greater production capacity. However, it faces difficulties in grading the pressing process, making it impossible to extract oil step-by-step, resulting in the discharge of fine particles. Existing twin-screw presses merely crush and extract water and oil through the squeezing and agitation between the propeller blades, failing to effectively grind materials or precisely grade them, resulting in poor pressing performance. Summary of the Invention

[0003] The purpose of this invention is to provide a double-spiral oilseed pressing device that uses multi-stage wide-screw segments to grind and press materials, and multi-stage narrow-screw segments to push materials with different degrees of driving force, thus solving the problems of insignificant material grading and pressing effects and the inability to effectively crush materials in existing devices.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a double-screw oilseed pressing device, comprising an integrated double cylinder, a screw assembly, and a discharge assembly; The integrated double cylinder includes an upper cylinder and a lower cylinder arranged symmetrically. After the upper cylinder and the lower cylinder are spliced ​​and sealed, an internal pressing chamber is formed. The pressing chamber is provided with multiple double spiral single channels and single spiral double channels from the input end to the output end. The double spiral single channels and single spiral double channels are arranged alternately in sequence. The upper cylinder is provided with a feeding port at the input end. Starting from the second double spiral single channel on the lower cylinder, oil discharge holes are evenly opened at the bottom. The screw assembly includes a first screw and a second screw, which are symmetrically arranged. The first screw includes a first shaft, multiple wide propeller segments, and multiple narrow propeller segments. The wide and narrow propeller segments are alternately arranged on the outer wall of the first shaft. The first and second screws alternately place the propeller blades together in the wide propeller segments and are correspondingly arranged in a double-helix single channel. The narrow propeller segments are correspondingly inserted in a single-helix double channel. The pitch of the wide propeller segments gradually decreases along the feeding to discharging direction. The pitch of the narrow propeller segments gradually decreases from the second to the last pitch from the input end to the output end. The integrated double cylinder has a discharge component at each of the two slag outlets, and a drive component at the input end of the integrated double cylinder to synchronously drive the first screw and the second screw to rotate in opposite directions.

[0005] The present invention is further configured such that the wide propeller segment includes a first wide propeller segment, a second wide propeller segment, and a third wide propeller segment sequentially from the input end to the output end, wherein the propeller blade depth of the first wide propeller segment, the second wide propeller segment, and the third wide propeller segment gradually decreases, and the distance between the outer edge of the propeller blade and the wall where the inner edge is located of the first wide propeller segment, the second wide propeller segment, and the third wide propeller segment gradually decreases; The first wide propeller segment has a conical propeller blade at the output end, while both ends of the second and third wide propeller segments have conical propeller blades.

[0006] The present invention is further configured such that the distance from the outer edge of the propeller blade of the first wide propeller segment, the second wide propeller segment, and the third wide propeller segment to the inner wall of the corresponding double helix single channel is equal to the distance from the outer edge of the propeller blade of the corresponding first wide propeller segment, the second wide propeller segment, and the third wide propeller segment to the wall where the inner edge is located.

[0007] The present invention is further configured such that a first rack and a second rack are provided at equal intervals on the outer edge of the propeller blades of the second wide propeller segment and the third wide propeller segment, respectively, and the average spacing between the first racks is greater than the average spacing between the second racks.

[0008] The present invention is further configured such that the oil drain holes at the positions of the second wide propeller segment and the third wide propeller segment are respectively the first oil drain hole and the second oil drain hole, and the diameter of the first oil drain hole is larger than that of the second oil drain hole. The diameter of the first oil drain hole is smaller than the tooth spacing at the deepest point of the first rack, and the diameter of the second oil drain hole is smaller than the tooth spacing at the deepest point of the second rack.

[0009] The present invention is further configured such that the narrow propeller segment comprises, from the input end to the output end, a first narrow propeller segment, a second narrow propeller segment, and a third narrow propeller segment in sequence, wherein the pitch of the first narrow propeller segment is 1 / 5 to 1 / 3 of the pitch of the first wide propeller segment, the pitch of the second narrow propeller segment is 1 / 5 to 1 / 3 of the pitch of the second wide propeller segment, and the pitch of the third narrow propeller segment differs from the pitch of the third wide propeller segment by no more than 10%.

[0010] The present invention is further configured such that the outer edge of the propeller blade of the first narrow propeller segment, the second narrow propeller segment and the third narrow propeller segment is 3-5 mm away from the inner wall of the corresponding single-helix double channel.

[0011] The present invention is further configured such that the discharge assembly includes a circular blocking plate, a circular mounting plate, a limiting post, and an adjusting bolt. Two rings of limiting posts are provided at the output end of the last set of single spiral dual channels. A return spring is fitted on each limiting post. The circular blocking plate is movably fitted on the corresponding limiting post around its edge. The circular mounting plate is fixedly fitted on the end of the corresponding limiting post around its edge. The adjusting bolt spirally penetrates the circular mounting plate and abuts against the outer wall of the circular blocking plate. The circular blocking plate has a shaft hole at its central axis, and the first shaft and the second shaft are movably inserted into the corresponding shaft hole at their output ends.

[0012] The invention is further configured such that the input ends of the first shaft and the second shaft extend outward from the input end of the integrated double cylinder, and a synchronous gear shaft is connected to the end of the first shaft and the second shaft at the input end. The two synchronous gear shafts mesh with each other, and one of the synchronous gear shafts is driven by a synchronous servo motor.

[0013] The present invention is further configured such that the upper cylinder and the lower cylinder are provided with rubber at the fitting position and are fixed by bolts through the edges of the upper cylinder and the lower cylinder.

[0014] The present invention has the following beneficial effects: 1. After the material is fed into the feeding port, it is first pressed and crushed by the first wide screw section. Due to the relatively large screw pitch, it mainly achieves the crushing effect. It is then pushed out through the first narrow screw section in a channel manner, so that it enters the second wide screw section under high pressure for finer pressing and crushing. In this section, water and oil can be pressed out. Then it enters the second narrow screw section and is pushed into the third wide screw section with greater thrust to achieve finer pressing and grinding to achieve a high oil yield. Finally, the residue is pushed out of the third narrow screw section, which can achieve precise grading pressing and grinding, and effectively achieve high-efficiency oil extraction.

[0015] 2. In this invention, first and second racks are provided at equal intervals on the outer edges of the propeller blades in the second and third wide propeller sections, respectively. The racks can reduce the slippage of materials during extrusion, and can more effectively cut materials, resulting in better oil extraction. The average spacing between the first racks is greater than the average spacing between the second racks, which realizes graded cutting of materials and achieves better oil extraction at different positions for materials of different fine particle sizes.

[0016] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of a double-screw oil pressing device.

[0019] Figure 2 This is a schematic diagram of the internal structure of a double-screw oil pressing device.

[0020] Figure 3 This is a schematic diagram of the first screw.

[0021] Figure 4 This is a schematic diagram of the lower cylinder structure.

[0022] The attached diagram lists the components represented by each number as follows: 1. Integrated double cylinder; 01. First shaft; 02. Second shaft; 11. Upper cylinder; 111. Feed port; 12. Lower cylinder; 121. First oil drain hole; 122. Second oil drain hole; 123. Double spiral single channel; 124. Single spiral double channel; 2. Drive assembly; 21. Synchronous servo motor; 22. Synchronous gear shaft; 3. First wide propeller segment; 4. First narrow propeller segment; 5. Second wide propeller segment; 51. First rack; 6. Second narrow propeller segment; 7. Third wide propeller segment; 8. Third narrow propeller segment; 9. Discharge assembly; 91. Limiting post; 92. Circular blocking plate; 93. Circular mounting plate; 94. Adjusting bolt; 95. Return spring. Detailed Implementation

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

[0024] Please see Figures 1-4 The present invention is a double-screw oil pressing device, comprising a double cylinder 1, a screw assembly and a discharge assembly 9; The integrated double cylinder 1 includes an upper cylinder 11 and a lower cylinder 12 arranged symmetrically. After the upper cylinder 11 and the lower cylinder 12 are spliced ​​and sealed, a pressing chamber is formed inside. The pressing chamber is provided with multiple double spiral single channels 123 and single spiral double channels 124 from the input end to the output end. The double spiral single channels 123 and single spiral double channels 124 are arranged alternately in sequence. The upper cylinder 11 is provided with a feeding port 111 at the input end. The double spiral single channels 123 on the lower cylinder 12 are all evenly opened with oil discharge holes at the bottom starting from the second one. The integrated double cylinder 1 is configured with an upper cylinder 11 and a lower cylinder 12 to facilitate internal grooving, which forms a channel after splicing. The double helix single channel 123 is used for the interlocking wide propeller segments to crush, press, and grind the material. The single helix double channel 124 is used for the water and oil pressed out by the double helix single channel 123 through two parallel narrow propeller segments, which are then squeezed out through the oil discharge orifice.

[0025] The screw assembly includes a first screw and a second screw, which are symmetrically arranged. The first screw includes a first shaft 01, multiple wide propeller segments, and multiple narrow propeller segments. The wide and narrow propeller segments are alternately arranged on the outer wall of the first shaft 01. The first and second screws alternately arrange the propeller blades together in the wide propeller segments and are correspondingly arranged in the double helix single channel 123. The narrow propeller segments are correspondingly inserted in the single helix double channel 124. The pitch of the wide propeller segments gradually decreases along the feeding to discharging direction. The pitch of the second to last narrow propeller segment from the input end to the output end gradually decreases. The structures on the first and second screws are symmetrically arranged, while the propellers are arranged in opposite spiral configurations. The pitch of the wide propeller segments gradually decreases along the feed to discharge direction (e.g., Figure 1 and 2 This allows the material to be pressed to different degrees in different double-spiral single-channel 123. The material is first crushed, then graded and crushed, and finally pressed. The material is graded and pressed into different degrees of fineness, and different degrees of oil are extracted. Because the pitch of the wide screw segment gradually decreases along the feeding to discharging direction, the degree of material pressing is different. The crushing and pressing in the front will make it easier for the subsequent finer pressing.

[0026] The integrated double cylinder 1 has a discharge component 9 corresponding to the two slag output ports, and the input end of the integrated double cylinder 1 is provided with a drive component 2 that synchronously drives the first screw and the second screw to rotate in opposite directions.

[0027] The discharge assembly 9 can control the discharge speed so that the material in front is squeezed and compressed by the spiral inside, and water and oil are discharged from the discharge orifice.

[0028] The wide propeller segment includes a first wide propeller segment 3, a second wide propeller segment 5, and a third wide propeller segment 7 sequentially from the input end to the output end. The propeller blade depth of the first wide propeller segment 3, the second wide propeller segment 5, and the third wide propeller segment 7 gradually decreases, and the distance between the outer edge of the propeller blade and the wall where the inner edge is located gradually decreases. The first wide propeller segment 3 has a conical propeller blade at the end facing the output, and both ends of the second wide propeller segment 5 and the third wide propeller segment 7 have conical propeller blades.

[0029] Setting up three wide screw sections is sufficient to achieve the pressing effect. The first wide screw section 3 mainly crushes the material into granules or powder, with low extrusion pressure and basically no oil output. When the material enters the second wide screw section 5, it will be subjected to more obvious extrusion, crushing, and pressing to form oil discharge, and the material will also become finer. The material enters the third wide screw section 7 to achieve final crushing and extrusion. Combined with the discharge component 9 at the rear to control the discharge speed, it is possible to control the material to squeeze out more oil and water when it is being squeezed, and the oil discharge is more thorough.

[0030] The distance between the outer edge of the propeller blade of the first wide propeller segment 3, the second wide propeller segment 5 and the third wide propeller segment 7 and the inner wall of the corresponding double helix single channel 123 is equal to the distance between the outer edge of the propeller blade of the first wide propeller segment 3, the second wide propeller segment 5 and the third wide propeller segment 7 and the wall where the inner edge is located.

[0031] The distances from the outer edges of the propeller blades of the first wide propeller segment 3, the second wide propeller segment 5, and the third wide propeller segment 7 to the walls containing their inner edges, as well as the distances from the outer edges of the propeller blades of the first wide propeller segment 3, the second wide propeller segment 5, and the third wide propeller segment 7 to the inner walls of the corresponding double-helix single-channel 123, determine the effect of material compression. The smaller the distance, the better the compression effect, the more obvious the oil extraction, and the lower the moisture content and residual oil content of the residue.

[0032] The second wide propeller segment 5 and the third wide propeller segment 7 have first racks 51 and second racks at equal intervals on the outer edges of their propeller blades, respectively, and the average spacing between the first racks 51 is greater than the average spacing between the second racks.

[0033] The first and second toothed racks can chop materials, reduce material slippage, and improve the effect of squeezing and pressing to discharge oil.

[0034] The oil drain holes at the positions of the second wide propeller section 5 and the third wide propeller section 7 are the first oil drain hole 121 and the second oil drain hole 122, respectively, and the diameter of the first oil drain hole 121 is larger than that of the second oil drain hole 122. In the second wide propeller section 5, the material particle size has not yet reached the minimum fineness, and the pore size is too small, which is not conducive to the discharge of water and oil. If the pore size is larger, the material will still not be able to be discharged, but it will be more conducive to the discharge of oil and water. In the third wide propeller section 7, the material will be further crushed to a finer degree. The second oil discharge pore 122 can block the material, but can further discharge residual water and oil. At the same time, the discharge speed is limited by the discharge component 9, which can control the oil discharge effect of the material being squeezed in this section.

[0035] The diameter of the first oil drain hole 121 is smaller than the tooth spacing at the deepest point of the first rack 51, and the diameter of the second oil drain hole 122 is smaller than the tooth spacing at the deepest point of the second rack.

[0036] The degree of material crushing and pressing is determined by the width of the tooth spacing at the deepest point (not entirely, but mostly determined by the width at this position). Therefore, the diameter of the first oil discharge fine hole 121 and the second oil discharge fine hole 122 is designed to be smaller than the tooth spacing at this position to minimize material discharge.

[0037] The narrow propeller segment, from input to output, includes a first narrow propeller segment 4, a second narrow propeller segment 6, and a third narrow propeller segment 8. The pitch of the first narrow propeller segment 4 is 1 / 5 to 1 / 3 of the pitch of the first wide propeller segment 3. The pitch of the second narrow propeller segment 6 is 1 / 5 to 1 / 3 of the pitch of the second wide propeller segment 5. The pitch of the third narrow propeller segment 8 differs from the pitch of the third wide propeller segment 7 by no more than 10%.

[0038] The propeller blade depth of the first narrow propeller section 4 is 2-5 cm, depending on the material characteristics. The propeller blade depth of the second narrow propeller section 6 is 1.5-3 cm, and the third narrow propeller section 8 is 2-3 cm. The third narrow propeller section 8 is mainly for discharging material and does not control the discharging speed. The speed control is adjusted by the discharging component 9 to ensure material discharge even when adjusting to a larger discharging speed.

[0039] The outer edges of the propeller blades of the first narrow propeller segment 4, the second narrow propeller segment 6, and the third narrow propeller segment 8 are 3-5 mm away from the inner wall of the corresponding single-helix double-channel 124. Maintaining a certain distance can prevent material from getting stuck in the single-helix double-channel 124 and also facilitate the rotation of the narrow propeller segments. The spacing can be determined according to the fineness of the material.

[0040] The discharge assembly 9 includes a circular blocking plate 92, a circular mounting plate 93, a limiting post 91, and an adjusting bolt 94. Two rings of limiting posts 91 are provided at the output end of the last set of single spiral double channels 124. A return spring 95 is fitted on each limiting post 91. The circular blocking plate 92 is movably fitted on the corresponding limiting post 91 around its edge. The circular mounting plate 93 is fixedly fitted on the end of the corresponding limiting post 91 around its edge. The adjusting bolt 94 spirally passes through the circular mounting plate 93 and abuts against the outer wall of the circular blocking plate 92. The circular blocking plate 92 has a shaft hole at its central axis position, and the first shaft 01 and the second shaft 02, which is symmetrical to the first shaft 01, are movably inserted into the corresponding shaft hole at the end position of the output end.

[0041] like Figure 1 The circular blocking plate 92 is pressed against the circular blocking plate 92 by rotating the gap adjusting bolt 94. The circular blocking plate 92 compresses the return spring 95, thereby adjusting the distance between the circular blocking plate 92 and the output outlet of the single spiral double channel 124. The smaller the distance, the slower the material discharge; the larger the distance, the larger the material discharge. However, the maximum material discharge speed is determined by the gap between the first shaft 01 and the second shaft 02 and the inner wall of the single spiral double channel 124.

[0042] The input ends of the first shaft 01 and the second shaft 02, which are symmetrical to the first shaft 01, extend outward from the input end of the integrated twin cylinder. The first shaft 01 and the second shaft 02 are each connected to a synchronous gear shaft 22 at the end of their input ends. The two synchronous gear shafts 22 mesh with each other, and one of the synchronous gear shafts 22 is driven by a synchronous servo motor 21.

[0043] Synchronous servo motor 21 drives one of the shafts (the second shaft 02 in the figure). Since the synchronous gear shaft 22 is the same size, it can ensure that the shafts rotate synchronously inward, ensuring that the propeller blades behind it are synchronously twisted together and will not touch each other.

[0044] The upper cylinder 11 and the lower cylinder 12 are provided with rubber at the fitting position and are fixed by bolts through the edges of the upper cylinder 11 and the lower cylinder 12.

[0045] Setting up the upper cylinder 11 and the lower cylinder 12 can ensure the cutting or casting of the internal cavity, and the cavity accuracy can be revised later. As long as the sealing is guaranteed, the splicing is sufficient.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A double-screw oilseed pressing device, characterized in that: It includes a twin-cylinder assembly (1), a screw assembly, and a discharge assembly (9). The integrated double cylinder (1) includes an upper cylinder (11) and a lower cylinder (12) arranged symmetrically. After the upper cylinder (11) and the lower cylinder (12) are joined and sealed, a pressing chamber is formed inside. The pressing chamber is provided with multiple double spiral single channels (123) and single spiral double channels (124) from the input end to the output end. The double spiral single channels (123) and single spiral double channels (124) are arranged alternately in sequence. The upper cylinder (11) is provided with a feeding port (111) at the input end. The double spiral single channels (123) on the lower cylinder (12) are all evenly opened with oil discharge holes at the bottom starting from the second one. The screw assembly includes a first screw and a second screw, which are symmetrically arranged left and right. The first screw includes a first shaft (01), multiple wide propeller segments and multiple narrow propeller segments. The wide propeller segments and narrow propeller segments are alternately arranged on the outer wall of the first shaft (01) and the second shaft (02) on the second screw. The first screw and the second screw alternately arrange the propeller blades together in the wide propeller segments and are correspondingly arranged in the double helix single channel (123), while the narrow propeller segments are correspondingly inserted in the single helix double channel (124). The pitch of the wide propeller segments gradually decreases along the feeding to discharging direction, and the pitch of the second to last narrow propeller segment from the input end to the output end gradually decreases. The integrated double cylinder (1) has a discharge component (9) corresponding to the two slag output ports. The input end of the integrated double cylinder (1) is provided with a drive component (2) that synchronously drives the first screw and the second screw to run in opposite directions.

2. The double-screw oil pressing equipment according to claim 1, characterized in that, The wide propeller segment includes a first wide propeller segment (3), a second wide propeller segment (5), and a third wide propeller segment (7) from the input end to the output end. The propeller blade depth of the first wide propeller segment (3), the second wide propeller segment (5), and the third wide propeller segment (7) gradually decreases. The distance between the outer edge of the propeller blade and the wall where the inner edge is located of the first wide propeller segment (3), the second wide propeller segment (5), and the third wide propeller segment (7) gradually decreases. The first wide propeller segment (3) has a conical propeller blade at the end facing the output, and both ends of the second wide propeller segment (5) and the third wide propeller segment (7) have conical propeller blades.

3. The double-screw oil pressing equipment according to claim 2, characterized in that, The distance between the outer edge of the propeller blade of the first wide propeller segment (3), the second wide propeller segment (5) and the third wide propeller segment (7) and the inner wall of the corresponding double helix single channel (123) is equal to the distance between the outer edge of the propeller blade of the first wide propeller segment (3), the second wide propeller segment (5) and the inner wall of the corresponding first wide propeller segment (3), the second wide propeller segment (5) and the third wide propeller segment (7).

4. The double-screw oil pressing equipment according to claim 2, characterized in that, The second wide propeller segment (5) and the third wide propeller segment (7) have first racks (51) and second racks at equal intervals on the outer edge of the propeller blades, respectively, and the average spacing between the first racks (51) is greater than the average spacing between the second racks.

5. A double-screw oil pressing device according to claim 4, characterized in that, The oil drain holes at the positions of the second wide propeller section (5) and the third wide propeller section (7) are the first oil drain hole (121) and the second oil drain hole (122), respectively. The diameter of the first oil drain hole (121) is larger than that of the second oil drain hole (122). The diameter of the first oil drain hole (121) is smaller than the tooth spacing at the deepest point of the first rack (51), and the diameter of the second oil drain hole (122) is smaller than the tooth spacing at the deepest point of the second rack.

6. The double-screw oil pressing equipment according to claim 2, characterized in that, The narrow propeller segment includes a first narrow propeller segment (4), a second narrow propeller segment (6), and a third narrow propeller segment (8) from the input end to the output end. The pitch of the first narrow propeller segment (4) is 1 / 5 to 1 / 3 of the pitch of the first wide propeller segment (3), the pitch of the second narrow propeller segment (6) is 1 / 5 to 1 / 3 of the pitch of the second wide propeller segment (5), and the pitch of the third narrow propeller segment (8) differs from the pitch of the third wide propeller segment (7) by no more than 10%.

7. A double-screw oil pressing device according to claim 6, characterized in that, The distance between the outer edge of the propeller blade of the first narrow propeller segment (4), the second narrow propeller segment (6) and the third narrow propeller segment (8) and the inner wall of the corresponding single-helix double channel (124) is 3-5 mm.

8. The double-screw oil pressing equipment according to claim 1, characterized in that, The discharge assembly (9) includes a circular blocking plate (92), a circular mounting plate (93), a limiting post (91), and an adjusting bolt (94). Two rings of limiting posts (91) are provided at the output end of the last set of single spiral double channels (124). A return spring (95) is fitted on each limiting post (91). The circular blocking plate (92) is movably fitted on the corresponding limiting post (91) around its edge. The circular mounting plate (93) is fixedly fitted on the end of the corresponding limiting post (91) around its edge. The adjusting bolt (94) spirally penetrates the circular mounting plate (93) and abuts against the outer wall of the circular blocking plate (92). The circular blocking plate (92) has a shaft hole at the center axis position, and the first shaft (01) and the second shaft (02) are movably inserted into the corresponding shaft hole at the end position of the output end.

9. A double-screw oil pressing device according to claim 1, characterized in that, The input ends of the first shaft (01) and the second shaft (02) extend outward from the input end of the integrated double cylinder (1). The first shaft (01) and the second shaft (02) are each connected to a synchronous gear shaft (22) at the end of the input end. The two synchronous gear shafts (22) mesh with each other, and one of the synchronous gear shafts (22) is driven by a synchronous servo motor (21).

10. A double-screw oil pressing device according to claim 1, characterized in that, The upper cylinder (11) and the lower cylinder (12) are provided with rubber at the fitting position and are fixed by bolts through the edges of the upper cylinder (11) and the lower cylinder (12).

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