A low-temperature pressing machine for processing walnut oil and its operating method

Abstract

The present application relates to the technical field of walnut oil low-temperature press, and discloses a press for walnut oil low-temperature press processing, which comprises a base, three equidistant support columns are fixedly installed on the top of the base, a mounting frame is fixedly installed at the middle of the three support columns, a connecting ring is installed on the top of the mounting frame, and a press cavity for separating walnut fragments from walnut oil is clamped on the inner wall of the connecting ring, a support seat is connected to the top of the press cavity, the bottom end of the support seat is fixedly connected with the top of the base, an oil guide ring for guiding the collection of walnut oil is fixedly connected to the top end of the support seat, an equipment seat is rotatably installed on the top end of the support column, the walnut fragments in the middle part can be expanded and pressurized from inside to outside, so that the walnut fragments in the middle part can be fully pressed, and the walnut oil in the middle part can be blown out of the walnut fragment cake by using gas, thereby solving the problem of resource waste.

Description

Technical Field

[0001] This invention relates to the field of low-temperature walnut oil pressing technology, specifically to a low-temperature walnut oil pressing machine and its operating method. Background Technology

[0002] Walnut oil is a nutritious edible oil widely used in various fine foods. The pressing process for walnut oil begins with selecting suitable walnut kernels and crushing them into small pieces. These pieces are then pressed using a press to extract the walnut oil. There are generally two methods for pressing walnut oil: cold pressing and heated pressing. Both methods have their advantages. While cold pressing may result in a slightly lower oil yield compared to heated pressing, it maximizes the preservation of beneficial components in the walnut oil, preventing damage and loss of these components during heating, thus preserving its nutritional value.

[0003] Existing low-temperature walnut presses have the problem of not being able to fully and evenly press the walnut pieces in the middle of the walnut residue during the pressing process. This results in insufficient pressing, which in turn prevents some of the walnut oil in the middle of the walnut residue cake from being collected through the outer walnut residue. As a result, a large amount of uncollected walnut oil remains inside the final waste walnut residue, leading to low production efficiency and resource waste. Summary of the Invention

[0004] In view of the prior art, existing low-temperature pressing machines for walnut oil processing cannot fully and evenly press the walnut pieces in the center of the walnut residue during the pressing process, resulting in insufficient pressing. Consequently, some walnut oil in the center of the walnut residue cake cannot be collected through the outer walnut residue, resulting in a large amount of uncollected walnut oil remaining inside the final waste walnut residue. This invention provides a pressing machine that expands and pressurizes the center of the walnut residue from the inside out, allowing for sufficient pressing of the central walnut residue. At the same time, it uses gas to blow the walnut oil in the center out of the walnut residue cake, thus solving the problem of resource waste and resolving the technical problems mentioned in the prior art.

[0005] This invention provides the following technical solution: a low-temperature pressing machine for processing walnut oil, comprising a base, three equidistantly distributed support columns fixedly installed on the top of the base, a mounting frame fixedly installed in the middle of the three support columns, a connecting ring installed on the top of the mounting frame, and a pressing chamber for separating walnut pieces and walnut oil being engaged with the inner wall of the connecting ring, a support seat being fitted to the top of the pressing chamber, the bottom end of the support seat being fixedly connected to the top of the base, and a walnut oil collection device being sleeved and fixedly connected to the top of the support seat. The system includes a guide ring, a support base with multiple oil guide holes at the top for collecting walnut oil flowing out of the pressing chamber, and the oil guide holes located inside the guide ring. A device base is rotatably mounted on the top of the support column, and a hydraulic press for pressing walnut residue in the pressing chamber is fixedly mounted on the bottom of the device base. A fixing ring is sleeved and fixed at the bottom of the pressing chamber. There are two sets of oil discharge mechanisms, both of which are inserted into the pressing chamber and distributed vertically. There are also two sets of internal pressure mechanisms, which are respectively installed at the bottom of the two oil discharge mechanisms. Preferably, the oil discharge mechanism includes a lower pressure plate, which is slidably connected to the inner wall of the pressing chamber. A first gas collecting pipe is fixedly connected to the bottom center of the lower pressure plate, and a first piston shaft is piston-connected to the bottom end of the first gas collecting pipe. Four second gas collecting pipes are also fixedly connected to the bottom of the lower pressure plate at equal intervals. A second piston shaft is piston-connected to the bottom end of each of the four second gas collecting pipes. A through hole of the same length as the second piston shaft is opened in the second piston shaft. A third piston shaft is piston-connected to the through hole, and the top end of the third piston shaft is fixedly connected to the bottom of the lower pressure plate. A T-shaped air guide pipe is connected through the outer wall of the first gas collecting pipe and the four second gas collecting pipes near the top end. An air jet head is fixedly installed at the bottom end of the T-shaped air guide pipe.

[0006] Preferably, the internal pressure mechanism includes four limiting covers, which are respectively fixedly connected to the bottom ends of four second piston shafts. An oil collection cup is fixedly connected to the bottom of the limiting cover. A connecting block is provided on the central shaft inside the oil collection cup. Four equidistantly distributed moving blocks are connected through the inner cavity of the oil collection cup. Four rotating blocks are rotatably connected to the connecting block and the four moving blocks. A hollow expansion block is fixedly connected to the end of each of the four moving blocks away from the rotating blocks. A solid-liquid separation membrane is installed on the surface of the hollow expansion block. An oil guiding cavity is opened inside the moving block. The two ends of the oil guiding cavity are respectively connected to the inner cavity of the oil collection cup and the hollow expansion block. A third spring is fixedly connected between two opposite moving blocks.

[0007] Preferably, a first spring is fixedly connected between the top end of the first piston shaft and the lower pressure plate, and a second spring is sleeved on the outer side of each of the four third piston shafts, with the two ends of the second spring fixedly connected to the lower pressure plate and the second piston shaft, respectively.

[0008] Preferably, the bottom of the inner cavity of the oil collecting cup is provided with a funnel-shaped groove, and the funnel-shaped groove is located below the four moving blocks. Preferably, an oil guide pipe is connected through the side of the oil collecting cup near the inner wall of the pressing chamber, and the oil guide pipe is connected to the bottom of the funnel-shaped groove inside the oil collecting cup.

[0009] Preferably, the device base is rotatably connected to the top of one of the support columns and slidably connected to the tops of the other two support columns, and a plug shaft is inserted between the tops of the device base and the other two support columns.

[0010] Preferably, a rotating frame is rotatably mounted on the support column that is rotatably connected to the equipment base, and a discharge box is fixedly mounted on the rotating frame, and the discharge box is connected to an external feeding pipe.

[0011] Preferably, the connecting ring has three equally spaced insertion holes, and the top of the mounting frame is fixedly connected to three limiting shafts corresponding to the connecting ring, and the three limiting shafts are respectively inserted into the three insertion holes.

[0012] An operating method for a low-temperature pressing machine for processing walnut oil, the specific steps of which are as follows:

[0013] S1. Rotate the rotating frame to discharge the ground walnut pieces into the pressing chamber in two separate batches through the external feeding pipe and the discharge box;

[0014] S2. Insert the two oil discharge mechanisms into the pressing chamber with the two batches of crushed walnuts fed in twice, and arrange them in a way that one layer of crushed walnuts is pressed down by one oil discharge mechanism.

[0015] S3. Rotate the equipment seat to the designated position and use the insert shaft to connect with the support column to fix and limit the equipment seat; S4. Start the hydraulic press, so that the output shaft of the hydraulic press gradually descends and presses against the lower pressure plate to squeeze the walnut pieces downward.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention uses an oil discharge mechanism to blow air into the interior of walnut residue through a pressing action. Taking advantage of the small size of gas molecules, they can pass through the gaps in the walnut residue and quickly blow out the walnut oil mixed in the middle of the residue. This allows the walnut oil to quickly approach the inner wall of the pressing chamber from the middle of the residue, accelerating the discharge effect. This solves the problem that as the walnut residue cake becomes increasingly compacted during the pressing process, the walnut oil that has seeped out in the middle cannot be discharged quickly, resulting in a large amount of waste in the middle of the final discharged residue cake.

[0018] 2. The present invention can also squeeze and expand the middle part of the walnut residue from the inside out when the walnut residue is not completely compacted through the internal pressure mechanism, thereby achieving the effect of pressing walnut oil from the inside. This avoids the problem that the walnut oil in the middle part of the walnut residue cannot be discharged quickly due to the distance from the pressing chamber and the problem of insufficient pressing. At this time, under the expansion of the hollow expansion block, the walnut oil in the middle part of the walnut residue will enter the inner cavity of the oil collection cup through the solid-liquid separation membrane and the oil guiding cavity, and finally be discharged in a concentrated manner. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the mounting frame and the lower pressure plate in this invention;

[0021] Figure 3 This is a cross-sectional view of the pressing chamber in this invention;

[0022] Figure 4 This is a schematic diagram of the structure at the bottom of the lower pressure plate in this invention;

[0023] Figure 5 This is a partial cross-sectional view of the oil discharge mechanism and the internal pressure application mechanism in this invention;

[0024] Figure 6 This is a schematic diagram of the structure of the second piston shaft, the third piston shaft, and the connecting block in this invention;

[0025] Figure 7 This is a schematic cross-sectional view of the second piston shaft and the portion extending to the oil guide cup in this invention.

[0026] Figure 8 This is a schematic diagram of the structure of the pressing chamber and support seat in this invention;

[0027] Figure 9 This is a schematic diagram of the structure of the support base and the oil guide ring in this invention;

[0028] Figure 10 This is a schematic diagram of the structure of the rotating frame and the discharge box in this invention.

[0029] In the diagram: 1. Base; 2. Support column; 3. Mounting frame; 4. Equipment base; 5. Hydraulic press; 6. Rotating frame; 7. Discharge box; 8. Pressing chamber; 9. Support seat; 10. Oil guide ring; 11. Insert shaft; 12. Connecting ring; 13. Limiting shaft; 14. Fixing ring;

[0030] 15. Oil discharge mechanism; 1501. Lower pressure plate; 1502. First gas collection pipe; 1503. First piston shaft; 1504. T-shaped gas guide pipe; 1505. Jet nozzle; 1506. First spring; 1507. Second gas collection pipe; 1508. Second piston shaft; 1509. Third piston shaft; 1510. Second spring;

[0031] 16. Internal pressure mechanism; 1601. Limiting cover; 1602. Oil cup; 1603. Oil guide pipe; 1604. Connecting block; 1605. Rotating block; 1606. Moving block; 1607. Oil guide cavity; 1608. Hollow expansion block; 1609. Third spring. Detailed Implementation

[0032] 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.

[0033] Please see Figures 1-10 A low-temperature pressing machine for processing walnut oil includes a base 1. Three equidistant support columns 2 are fixedly mounted on the top of the base 1. A mounting frame 3 is fixedly mounted in the middle of the three support columns 2. A connecting ring 12 is mounted on the top of the mounting frame 3, and a pressing chamber 8 for separating walnut pieces and walnut oil is engaged with the inner wall of the connecting ring 12. A support seat 9 is fitted to the top of the pressing chamber 8, and the bottom end of the support seat 9 is fixedly connected to the top of the base 1. An oil guide ring 10 for guiding the collection of walnut oil is sleeved and fixedly connected to the top of the support seat 9. The top of the support base 9 is provided with multiple oil guide holes for collecting walnut oil flowing out of the pressing chamber 8, and the oil guide holes are located inside the oil guide ring 10. The top of the support column 2 is rotatably mounted with an equipment base 4. The bottom of the equipment base 4 is fixedly mounted with a hydraulic press 5 for pressing the walnut residue in the pressing chamber 8. The bottom end of the pressing chamber 8 is fitted with a fixing ring 14. There are two sets of oil discharge mechanisms 15, which are inserted into the pressing chamber 8 and distributed vertically. There are two sets of internal pressure applying mechanisms 16, which are respectively installed at the bottom of the two oil discharge mechanisms 15.

[0034] It is worth noting that during the pressing of walnut residue, the arrangement of two sets of oil discharge mechanisms 15 and an internal pressure mechanism 16, with one layer of walnut residue followed by one layer of oil discharge mechanism 15 and internal pressure mechanism 16, allows for the simultaneous pressing of multiple walnut residue cakes. This reduces the thickness of the walnut residue during single pressing, lowers pressing energy consumption, and increases the oil yield. During this process, the oil discharge mechanism 15 uses the pressing action to blow air into the walnut residue. Utilizing the small size of gas molecules, they can pass through the gaps in the walnut residue, quickly blowing out the walnut oil mixed in the middle of the residue. This allows the walnut oil to quickly approach the inner wall of the pressing chamber 8 from the middle of the walnut residue, accelerating its discharge. This design effectively solves the problem of walnut oil seeping out from the middle of the walnut cake not being able to drain quickly as it becomes increasingly compacted during the pressing process, resulting in a large amount of walnut oil remaining in the middle of the final discharged cake and thus causing waste. At the same time, the internal pressure mechanism 16 can also squeeze and expand the middle of the walnut cake from the inside out when the walnut cake is not completely compacted, thereby achieving the effect of pressing walnut oil from the inside. This avoids the problem of walnut oil in the middle of the walnut cake not being able to drain quickly due to its distance from the pressing chamber 8, as well as the problem of insufficient pressing. At this time, under the expansion of the hollow expansion block 1608, the walnut oil in the middle of the walnut cake will enter the inner cavity of the oil collection cup 1602 through the solid-liquid separation membrane and the oil guiding cavity 1607, and finally be discharged in a concentrated manner.

[0035] Furthermore, the oil discharge mechanism 15 includes a lower pressure plate 1501, which is slidably connected to the inner wall of the pressing chamber 8. A first gas collecting pipe 1502 is fixedly connected to the bottom center of the lower pressure plate 1501, and a first piston shaft 1503 is piston-connected to the bottom end of the first gas collecting pipe 1502. Four equally spaced second gas collecting pipes 1507 are also fixedly connected to the bottom of the lower pressure plate 1501. A second piston shaft 1508 is piston-connected to the bottom end of each of the four second gas collecting pipes 1507. A through hole of the same length as the second piston shaft 1508 is opened inside the second piston shaft 1508, and a third piston shaft 1509 is piston-connected inside the through hole. The top end of the third piston shaft 1509 is fixedly connected to the bottom of the lower pressure plate 1501. T-shaped air guide pipes 1504 are connected to the outer walls of the air collecting pipe 1502 and the four second air collecting pipes 1507 near the top. A jet nozzle 1505 is fixedly installed at the bottom of the T-shaped air guide pipe 1504. Through the continuous downward pressure of the output shaft of the hydraulic press 5, it will first come into contact with the lower pressure plate 1501 located above, and then cause the lower pressure plate 1501 to press the walnut residue downward. During this process, the two oil discharge mechanisms 15 will move downward continuously under the downward pressure force and press the walnut residue at their bottom, achieving the effect of pressing multiple walnut residue cakes at one time. This reduces the thickness of the walnut cake during one-time pressing, reduces pressing energy consumption, and increases the pressing oil yield. During this process, the first piston shaft 1503 and the second piston shaft 1508 will gradually retract into the first gas collecting pipe 1502 and the second gas collecting pipe 1507 during the compression. At this time, the compressed air generated in the first gas collecting pipe 1502 and the second gas collecting pipe 1507 will enter the middle of the walnut residue through the T-shaped air guide pipe 1504 and the jet nozzle 1505. Taking advantage of the small volume of gas molecules, they can shuttle through the gaps in the walnut residue and quickly blow out the walnut oil mixed in the middle of the walnut residue. This allows the walnut oil to quickly approach the inner wall of the pressing chamber 8 from the middle of the walnut residue, accelerating the discharge effect. This solves the problem that the walnut residue cake becomes increasingly compacted during the pressing process, causing the walnut oil that seeps out in the middle to not be discharged quickly, resulting in a large amount of walnut oil still being wasted in the middle of the final discharged residue cake.

[0036] Furthermore, the internal pressure mechanism 16 includes four limiting covers 1601, which are fixedly connected to the bottom ends of four second piston shafts 1508. An oil collection cup 1602 is fixedly connected to the bottom of each limiting cover 1601. A connecting block 1604 is mounted on the central shaft inside the oil collection cup 1602. Four equidistantly distributed moving blocks 1606 are connected through the inner cavity of the oil collection cup 1602. Four rotating blocks 1604 are rotatably connected to the connecting block 1604 and the four moving blocks 1606. 605. A hollow expansion block 1608 is fixedly connected to one end of each of the four movable blocks 1606 away from the rotating block 1605. A solid-liquid separation membrane is installed on the surface of the hollow expansion block 1608. An oil guiding cavity 1607 is formed inside each movable block 1606. The two ends of the oil guiding cavity 1607 are respectively connected to the oil receiving cup 1602 and the inner cavity of the hollow expansion block 1608. A third spring 1609 is fixedly connected between two opposing movable blocks 1606, and a set of internal pressure applying mechanisms 16... The four oil collection cups 1602 are distributed around the center of the corresponding residue cake, which can achieve a uniform outward expansion and compression effect on the center of the residue cake. During this period, the connecting block 1604 inside each oil collection cup 1602 will abut against the third piston shaft 1509 as the lower pressure plate 1501 drives the third piston shaft 1509 to continuously press down, and under its drive, move down to the designated position simultaneously. At this time, the downward movement of the connecting block 1604 will push the four rotating blocks 1605 to expand, thereby pushing the moving block 1606 to drive the hollow expansion block 1608 to expand outward, and achieve the effect of applying pressure outward from the inside of the walnut residue. This solves the problem that the walnut oil located in the center of the walnut residue cannot be discharged quickly and the pressing is insufficient during the pressing process because it is far from the pressing chamber 8. At this time, under the expansion of the hollow expansion block 1608, the walnut oil located in the center of the walnut residue will enter the inner cavity of the oil collection cup 1602 through the solid-liquid separation membrane and the oil guiding cavity 1607, and finally be discharged in a concentrated manner.

[0037] Furthermore, a first spring 1506 is fixedly connected between the top end of the first piston shaft 1503 and the lower pressure plate 1501. A second spring 1510 is sleeved on the outer side of each of the four third piston shafts 1509. The two ends of the second spring 1510 are fixedly connected to the lower pressure plate 1501 and the second piston shaft 1508, respectively. The setting of the first spring 1506 and the second spring 1510 can assist in the reset of the first piston shaft 1503 and the second piston shaft 1508. During the pressing process, as the first piston shaft 1503 and the second piston shaft 1508 move, the compressed air increases. When the compressed air is discharged and the hydraulic press 5 stops pressing downwards, the rebound reset of the first spring 1506 and the second spring 1510 can quickly reset the first piston shaft 1503 and the second piston shaft 1508, so that the oil discharge mechanism 15 can be used continuously multiple times.

[0038] Furthermore, a funnel-shaped groove is provided at the bottom of the inner cavity of the oil collecting cup 1602, and the funnel-shaped groove is located below the four moving blocks 1606. This setting can increase the inner cavity space of the oil collecting cup 1602, making it easier to collect and hold more walnut oil. At the same time, the tilt angle of the funnel-shaped groove can accelerate the downward flow of walnut oil, improve the collection effect, and avoid the problem of backflow of collected walnut oil.

[0039] Furthermore, an oil guide pipe 1603 is connected to the side of the oil collection cup 1602 near the inner wall of the pressing chamber 8, and the oil guide pipe 1603 is connected to the bottom of the inner trough of the oil collection cup 1602. With the above settings, after the walnut oil is squeezed again into the trough of the oil collection cup 1602 by the moving block 1606 and the hollow expansion block 1608, the walnut oil can be directly guided to the inner wall of the pressing chamber 8. This allows the walnut oil that is pressed again from the middle of the walnut residue to be directly discharged from the pressing chamber 8, improving the discharge efficiency of the walnut oil in the middle of the walnut residue and avoiding the problem of the walnut oil in the middle flowing back into other walnut residues due to lack of guidance.

[0040] Furthermore, the equipment base 4 is rotatably connected to the top of one of the support columns 2 and slidably connected to the tops of the other two support columns 2. An insert shaft 11 is inserted between the tops of the equipment base 4 and the tops of the other two support columns 2. Through the above settings, the hydraulic press 5 can be easily rotated under the action of the equipment base 4. When the technician removes the walnut cake from the pressing chamber 8, he can rotate the hydraulic press 5 to collect the cake on one side, thus avoiding the fragments from falling back into the pressing chamber 8 during the cake removal process and affecting the next pressing effect. The insert shaft 11 can also fix and limit the equipment base 4, thereby improving the stability of the hydraulic press 5 at the top of the support columns 2 when it is working.

[0041] Among them, a rotating frame 6 is rotatably installed on the support column 2 that is rotatably connected to the equipment base 4, and a discharge box 7 is fixedly installed on the rotating frame 6. The discharge box 7 is connected to the external feeding pipe. Through the above settings, manual labor can be freed up, eliminating the need for manual feeding, reducing labor costs, and improving the production efficiency of the press. At the same time, it also avoids the problem that external pollutants can easily enter the pressing chamber 8 during manual feeding, thereby reducing the quality of walnut oil.

[0042] In addition, the connecting ring 12 has three equally spaced insertion holes. The top of the mounting frame 3 is fixedly connected with three limiting shafts 13 corresponding to the connecting ring 12, and the three limiting shafts 13 are respectively inserted into the three insertion holes. With the above settings, the connecting ring 12 can be quickly disassembled and assembled, thereby facilitating the removal of the pressing chamber 8 and enabling technicians to perform regular maintenance on the pressing chamber 8.

[0043] It is worth noting that the operating method of a press for low-temperature pressing of walnut oil includes the following specific steps:

[0044] S1. Rotate the rotating frame 6 to discharge the ground walnut pieces into the pressing chamber 8 in two separate feedings through the external feeding pipe and the discharge box 7.

[0045] S2. Insert the two oil discharge mechanisms 15 into the pressing chamber 8 with the two batches of crushed walnuts fed in twice, and arrange them in such a way that one layer of crushed walnuts is pressed down by one oil discharge mechanism 15.

[0046] S3. Rotate the equipment base 4 to the designated position and use the insert shaft 11 to connect with the support column 2 to fix and limit the equipment base 4;

[0047] S4. Start the hydraulic press 5, so that the output shaft of the hydraulic press 5 gradually descends and abuts against the lower pressure plate 1501 to squeeze the crushed walnuts downwards.

[0048] The working principle of this invention is as follows: The hydraulic press 5 output shaft continuously presses downwards, first contacting the upper pressure plate 1501, which then presses the walnut residue downwards. During this process, both oil discharge mechanisms 15 move downwards under the downward pressing force, pressing the walnut residue at their bottoms. This achieves the effect of pressing multiple walnut residue cakes at once, thereby reducing the thickness of the walnut cake during single pressing, reducing pressing energy consumption, and increasing the oil yield. During this process, the first piston shaft 1503 and the second piston shaft 1508 gradually retract into the first gas collecting pipe 1 during pressing. In the first and second air collection pipes 1502 and 1507, the compressed air generated in these pipes enters the middle of the walnut residue through the T-shaped air guide pipe 1504 and the jet nozzle 1505. Utilizing the small size of gas molecules, they can pass through the gaps in the walnut residue, quickly blowing out the walnut oil mixed in the middle. This allows the walnut oil to quickly approach the inner wall of the pressing chamber 8 from the middle of the residue, accelerating its discharge. This solves the problem of walnut oil remaining in the middle of the residue cake as it becomes increasingly compacted during pressing, preventing its rapid discharge and resulting in a large waste of walnut oil. Simultaneously, four oil-collecting cups 1602 on an internal pressure-applying mechanism 16 are distributed around the center of the corresponding residue cake, achieving a uniform outward expansion and compression effect on the center of the residue cake. During this period, the connecting block 1604 inside each oil-collecting cup 1602 will contact the third piston shaft 1509 as the pressure plate 1501 drives the third piston shaft 1509 to continuously press down, and under its drive, synchronously move downward to the designated position. At this time, the downward movement of the connecting block 1604 will push the four rotating blocks 1605 to expand, thereby pushing the moving block 1606 to drive the hollow expansion block 1608 to expand outward, and achieving outward pressure from inside the walnut residue. This design effectively solves the problem of insufficient pressing and slow discharge of walnut oil located in the middle of the walnut residue due to its distance from the pressing chamber 8. With the expansion of the hollow expansion block 1608, the walnut oil in the middle of the walnut residue passes through the solid-liquid separation membrane and the oil guiding cavity 1607 into the inner cavity of the oil collecting cup 1602, and is then discharged. The combination of these two oil discharge mechanisms 15 and the internal pressure mechanism 16 achieves expansion and pressure on the middle of the walnut residue from the inside out, ensuring thorough pressing. Simultaneously, gas is used to blow the walnut oil from the middle of the walnut residue cake, thus solving the problem of resource waste.

Claims

1. A press for cold-pressing processing of walnut oil, comprising a base (1), characterized in that: The top of the base (1) is fixedly provided with three equidistant support columns (2), the middle portions of the three support columns (2) are fixedly provided with a mounting frame (3), the top of the mounting frame (3) is provided with a connecting ring (12), the inner wall of the connecting ring (12) is clamped with a pressing chamber (8) for separating walnut fragments and walnut oil, the bottom of the pressing chamber (8) is connected with a support seat (9), the bottom end of the support seat (9) is fixedly connected with the top of the base (1), the top end of the support seat (9) is fixedly connected with an oil guide ring (10) for guiding the collection of walnut oil, a plurality of oil guide holes for collecting walnut oil flowing out of the pressing chamber (8) are formed in the top of the support seat (9) and located in the oil guide ring (10), the top end of the support column (2) is rotatably provided with an equipment seat (4), the bottom of the equipment seat (4) is fixedly provided with a hydraulic press (5) for pressing the walnut fragments in the pressing chamber (8), the bottom end of the pressing chamber (8) is fixedly provided with a fixing ring (14); Two sets of oil discharge mechanisms (15), both of which are inserted into the pressing chamber (8) and are distributed vertically; Two sets of internal pressure applying mechanisms (16), both of which are installed at the bottom of the two oil discharge mechanisms (15); The oil discharge mechanism (15) comprises a lower pressing disc (1501), the lower pressing disc (1501) is slidably connected with the inner wall of the pressing chamber (8), the bottom center of the lower pressing disc (1501) is fixedly connected with a first gas collecting pipe (1502), the bottom end of the first gas collecting pipe (1502) is piston-connected with a first piston shaft (1503), the bottom of the lower pressing disc (1501) is further fixedly connected with four equidistant second gas collecting pipes (1507), the bottom ends of the four second gas collecting pipes (1507) are piston-connected with second piston shafts (1508), the second piston shafts (1508) are provided with through holes with the same length, the through holes are piston-connected with third piston shafts (1509), the top ends of the third piston shafts (1509) are fixedly connected with the bottom of the lower pressing disc (1501), the outer walls of the first gas collecting pipe (1502) and the four second gas collecting pipes (1507) near the top ends are all through-connected with T-shaped gas guide pipes (1504), the bottom ends of the T-shaped gas guide pipes (1504) are fixedly provided with jet heads (1505).

2. A press for low temperature pressing of walnut oil according to claim 1, characterized in that: The internal pressure applying mechanism (16) comprises four limiting covers (1601), the four limiting covers (1601) are fixedly connected at the bottom ends of the four second piston shafts (1508), the bottom of the limiting cover (1601) is fixedly connected with an oil collecting cup (1602), a connecting block (1604) is arranged on the central axis in the oil collecting cup (1602), four moving blocks (1606) are connected in the oil collecting cup (1602) in a penetrating mode and are distributed at equal intervals, the connecting block (1604) and the four moving blocks (1606) are rotatably connected with four rotating blocks (1605), the ends, away from the rotating blocks (1605), of the four moving blocks (1606) are fixedly connected with hollow expansion blocks (1608), the surfaces of the hollow expansion blocks (1608) are provided with solid-liquid separation membranes, oil guide cavities (1607) are formed in the moving blocks (1606), and the two ends of the oil guide cavities (1607) are communicated with the oil collecting cup (1602) and the inner cavities of the hollow expansion blocks (1608), wherein two opposite moving blocks (1606) are fixedly connected with a third spring (1609).

3. A press for low temperature pressing of walnut oil according to claim 1, characterized in that: The top end of the first piston shaft (1503) and the lower pressing disc (1501) are fixedly connected with a first spring (1506), the outer sides of the four third piston shafts (1509) are sleeved with second springs (1510), and the two ends of the second spring (1510) are fixedly connected with the lower pressing disc (1501) and the second piston shaft (1508).

4. A press for cold-pressing processing of walnut oil according to claim 2, characterized in that: A hopper-shaped groove is formed in the bottom of the inner cavity of the oil collecting cup (1602), and the hopper-shaped groove is located below the four moving blocks (1606).

5. A press for cold-pressing processing of walnut oil according to claim 4, characterized in that: An oil guide pipe (1603) is connected to the side of the oil collecting cup (1602) close to the inner wall of the pressing chamber (8) in a penetrating mode, and the oil guide pipe (1603) is communicated with the bottom of the hopper-shaped groove in the oil collecting cup (1602).

6. A press for low temperature pressing of walnut oil according to claim 1, characterized in that: The equipment seat (4) is rotatably connected with the top end of one support column (2) and is slidably connected with the top ends of the other two support columns (2), and a plug shaft (11) is inserted and mounted between the top end of the equipment seat (4) and the top ends of the other two support columns (2).

7. A press for cold-pressing processing of walnut oil according to claim 6, characterized in that: The support column (2) rotatably connected with the equipment seat (4) is rotatably provided with a rotating frame (6), and the rotating frame (6) is fixedly provided with a discharge box (7) connected with an external feeding pipe.

8. A press for low temperature pressing of walnut oil according to claim 1, characterized in that: Three insertion holes are formed in the connecting ring (12) at equal intervals, the top of the mounting frame (3) is fixedly provided with three limiting shafts (13) corresponding to the connecting ring (12), and the three limiting shafts (13) are respectively inserted into the three insertion holes.

9. The operating method of a press for the cold-pressing processing of walnut oil according to claim 7, characterized in that, The specific steps are as follows: S1, rotate the rotating frame (6), and pass the ground walnut pieces into the pressing chamber (8) through the external feeding pipe and the discharge box (7) in two times; S2, insert the two oil discharging mechanisms (15) into the pressing chamber (8) in two times according to the input walnut pieces, and arrange the walnut pieces by pressing one layer of walnut pieces with one oil discharging mechanism (15). S3, rotate the equipment base (4) to the designated position, and fix and limit the equipment base (4) by inserting the shaft (11) with the support column (2); S4, start the hydraulic machine (5), so that the output shaft of the hydraulic machine (5) gradually drops and extrudes the walnut fragments downward.

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