Multi-stage separation and purification device for rapeseed oil production

Abstract

According to the multi-stage separation and purification device for rapeseed oil production provided by the invention, rapeseed oil is filtered for multiple times by adopting the first filtering chamber and the second filtering chamber, and purification is facilitated by multiple times of filtering; during cleaning, when residues on the first filter plate and the second filter plate affect filtering, the whole device needs to be settled for 1-2 hours (at night or within a short filtering time period), and after settling, the output end of the first hydraulic cylinder is started to contract to drive the first baffle to leave the first filter plate; the output end of a second hydraulic cylinder is started to contract to drive a second baffle to leave a second filter plate, then a first telescopic rod is started to stretch out to drive a first push plate to push residues on the first filter plate into a cleaning chamber, and meanwhile a second telescopic rod is started to stretch out to drive a second push plate to push residues on the second filter plate into the cleaning chamber; and residues can fall into the top of a placement plate under the action of a second flow guide plate, a first telescopic rod and a second telescopic rod can be properly started to move back and forth several times so that the residues can be better cleaned, after the residues are cleaned, the residues can be taken out through a cleaning pipeline, and through the structure, the residues can be conveniently cleaned.

Description

Technical Field

[0001] The invention belongs to the technical field of rapeseed oil production and purification, and in particular relates to a multi-stage separation and purification device for rapeseed oil production. Background Art

[0002] Rapeseed oil, commonly known as rapeseed oil, is a kind of vegetable edible oil made from rapeseed as raw material. It is also one of the main edible oils in my country. It is mainly produced in the Yangtze River Basin and the southwest and northwest regions, and its output ranks first in the world. It has certain effects of softening blood vessels and delaying aging. Since there are still a lot of impurities in the rapeseed oil after pressing, a lot of impurities will deepen the color of the rapeseed oil and affect the quality of the rapeseed oil, so it is necessary to purify the rapeseed oil.

[0003] At present, in the production process of rapeseed oil, a purification device is needed to filter and purify the squeezed rapeseed oil to separate the rapeseed residue from the rapeseed oil. The traditional separation and purification device usually uses a layer of filter to filter the rapeseed oil. The rapeseed oil after one purification is still not of high purity and will contain fine residues. The existing separation and purification device is time-consuming and labor-intensive when cleaning the remaining residues. Therefore, the present invention proposes a multi-stage separation and purification device for rapeseed oil production to solve the above problems. Summary of the invention

[0004] The invention provides a multi-stage separation and purification device for rapeseed oil production, aiming to solve the problems raised by the background technology.

[0005] The present invention is achieved by providing a multi-stage separation and purification device for producing rapeseed oil, comprising a separation and purification tank;

[0006] The separation and purification tank is provided with a first filter chamber, a second filter chamber, a cleaning chamber and an oil storage chamber;

[0007] The first filter chamber comprises an oil inlet hopper, a first telescopic rod and a fixed plate, a first filter plate is arranged below the oil inlet hopper, the first telescopic rod is arranged on the outer wall of the separation and purification tank, the telescopic end of the first telescopic rod is located inside the first filter chamber, the telescopic end of the first telescopic rod is connected to a first push plate, the first push plate is slidably connected to the top surface of the first filter plate, the fixed plate is an inverted L-shaped structure, a first hydraulic cylinder is arranged inside the fixed plate, and the output end of the first hydraulic cylinder is connected to a first baffle;

[0008] The second filter chamber comprises a first guide plate, a second telescopic rod and a baffle, the first guide plate is arranged on the bottom surface of the first filter plate, a second filter plate is arranged below the first guide plate, the filter aperture of the second filter plate is smaller than the filter aperture of the first filter plate, the second telescopic rod is arranged on the outer wall of the separation and purification tank, the telescopic end of the second telescopic rod is located inside the second filter chamber, the telescopic end of the second telescopic rod is connected to the second push plate, the second push plate is slidably connected to the top surface of the second filter plate, the baffle is fixedly arranged on the bottom surface of the first filter plate and is away from the second telescopic rod, a second hydraulic cylinder is arranged inside the baffle, and the output end of the second hydraulic cylinder is connected to the second baffle;

[0009] The cleaning chamber comprises a second guide plate and a placement plate, wherein the second guide plate is arranged on the bottom surface of the second filter plate, and the placement plate is close to the bottom surface of the inner wall of the separation and purification tank and connected to the inner wall of the separation and purification tank;

[0010] The oil storage chamber is located below the second filtering chamber and is used for storing filtered rapeseed oil.

[0011] Preferably, the first push plate is used to push the residue on the first filter plate into the cleaning chamber.

[0012] Preferably, when the output end of the first hydraulic cylinder extends to drive the first baffle to contact the first filter plate, the fixed plate and the first baffle will prevent rapeseed oil from entering the cleaning chamber; when the output end of the first hydraulic cylinder contracts to drive the first baffle to leave the first filter plate, the first push plate is used to push the residue on the first filter plate into the cleaning chamber.

[0013] Preferably, the second push plate is used to push the residue on the second filter plate into the cleaning chamber.

[0014] Preferably, when the output end of the second hydraulic cylinder extends to drive the second baffle to contact the second filter plate, the shielding plate and the second baffle will prevent rapeseed oil from entering the cleaning chamber; when the output end of the second hydraulic cylinder contracts to drive the second baffle to leave the second filter plate, the second push plate can be used to push the residue on the second filter plate into the cleaning chamber.

[0015] Preferably, an oil inlet pipeline is provided on the top surface of the separation and purification tank, and the oil inlet pipeline is connected to the oil inlet hopper.

[0016] Preferably, an oil outlet pipeline is provided on the bottom surface of the separation and purification tank, and the oil outlet pipeline is connected to the oil storage chamber.

[0017] Preferably, the outer wall of the separation and purification tank is also provided with a cleaning pipe, and the cleaning pipe is connected to the interior of the cleaning chamber.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. When in use, the output end of the first hydraulic cylinder extends to drive the first baffle to contact the first filter plate, and the output end of the second hydraulic cylinder extends to drive the second baffle to contact the second filter plate, and the first telescopic rod and the second telescopic rod are both in a contracted state; the rapeseed oil is added into the separation and purification tank from the oil inlet pipeline, and the rapeseed oil first enters the first filter chamber, and after entering the oil inlet hopper, the rapeseed oil will fall on the first filter plate for the first filtration, and the larger particle residue after filtration will remain on the first filter plate, and the rapeseed oil filtered for the first time will pass through the first filter plate into the second filter chamber, and under the action of the first guide plate, the rapeseed oil filtered for the first time will fall on the second filter plate for the second filtration, and the smaller particle residue after filtration will remain on the second filter plate, and the rapeseed oil filtered for the second time will pass through the second filter plate into the oil storage chamber, and finally, after the oil storage chamber is full of oil, the rapeseed oil filtered twice is discharged from the oil outlet pipeline for collection, and multiple filtrations are beneficial to purification;

[0020] 2. During cleaning, when the residue on the first filter plate and the second filter plate affects the filtration, the entire device needs to be quiet for 1-2 hours (you can choose to do it at night or during a period of time when the filtering work is less). After quieting, start the output end of the first hydraulic cylinder to contract and drive the first baffle to leave the first filter plate, start the output end of the second hydraulic cylinder to contract and drive the second baffle to leave the second filter plate, and then start the first telescopic rod to extend and drive the first push plate to push the residue on the first filter plate into the cleaning chamber, and at the same time start the second telescopic rod to extend and drive the second push plate to push the residue on the second filter plate into the cleaning chamber. The residue will fall onto the top of the placement plate under the action of the second guide plate. You can start the first telescopic rod and the second telescopic rod appropriately to go back and forth several times to better clean the residue. After the residue is cleaned, the residue can be taken out through the cleaning pipe; this structure is convenient for cleaning the residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the overall structure of the present invention;

[0022] Figure 2 It is a front cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the first filter chamber in the present invention;

[0024] Figure 4 It is a schematic diagram of the internal structure of the second filter chamber in the present invention.

[0025] In the figure:

[0026] 1. Separation and purification tank; 11. Oil inlet pipeline; 12. Oil outlet pipeline;

[0027] 2. First filter chamber; 21. Oil inlet hopper; 22. First filter plate; 23. First telescopic rod; 24. First push plate; 25. Fixed plate; 26. First hydraulic cylinder; 27. First baffle;

[0028] 3. Second filter chamber; 31. First guide plate; 32. Second filter plate; 33. Second telescopic rod; 34. Second push plate; 35. Shielding plate; 36. Second hydraulic cylinder; 37. Second baffle;

[0029] 4. Cleaning chamber; 41. Second guide plate; 42. Placement plate; 43. Cleaning pipeline;

[0030] 5. Oil storage room. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0033] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figures 1 to 4 The present invention provides a technical solution: a multi-stage separation and purification device for rapeseed oil production, comprising a separation and purification tank 1; a first filter chamber 2, a second filter chamber 3, a cleaning chamber 4 and an oil storage chamber 5 are arranged inside the separation and purification tank 1; the first filter chamber 2 comprises an oil inlet hopper 21, a first telescopic rod 23 and a fixed plate 25, a first filter plate 22 is arranged below the oil inlet hopper 21, the first telescopic rod 23 is arranged on the outer wall of the separation and purification tank 1, the telescopic end of the first telescopic rod 23 is located inside the first filter chamber 2, the telescopic end of the first telescopic rod 23 is connected to the first push plate 24, the first push plate 24 is slidably connected to the top surface of the first filter plate 22, the fixed plate 25 is an inverted L-shaped structure, a first hydraulic cylinder 26 is arranged inside the fixed plate 25, and the output end of the first hydraulic cylinder 26 is connected to the first baffle 27; the second filter chamber 3 comprises a first guide plate 31, a second telescopic rod 33 and a shielding plate 35, the first guide plate 31 is arranged on the first filter plate 2 2 bottom surface, a second filter plate 32 is provided below the first guide plate 31, the filter aperture of the second filter plate 32 is smaller than the filter aperture of the first filter plate 22, a second telescopic rod 33 is provided on the outer wall of the separation and purification tank 1, the telescopic end of the second telescopic rod 33 is located inside the second filter chamber 3, the telescopic end of the second telescopic rod 33 is connected to the second push plate 34, the second push plate 34 is slidably connected to the top surface of the second filter plate 32, a shielding plate 35 is fixedly provided on the bottom surface of the first filter plate 22 and away from the second telescopic rod 33, a second hydraulic cylinder 36 is provided inside the shielding plate 35, and the output end of the second hydraulic cylinder 36 is connected to the second baffle 37; the cleaning chamber 4 includes a second guide plate 41 and a placement plate 42, the second guide plate 41 is provided on the bottom surface of the second filter plate 32, the placement plate 42 is close to the bottom surface of the inner wall of the separation and purification tank 1 and is connected to the inner wall of the separation and purification tank 1; the oil storage chamber 5 is located below the second filter chamber 3, for storing filtered rapeseed oil.

[0037] In this embodiment, refer to Figure 2 , wherein the left inner wall of the separation and purification tank 1, the first filter plate 22, the first baffle plate 27 and the fixed plate 25 form a first filter chamber 2; the left inner wall of the separation and purification tank 1, the second filter plate 32, the second baffle plate 37 and the shielding plate 35 form a second filter chamber 3; the right inner wall of the separation and purification tank 1, the first baffle plate 27, the fixed plate 25, the second baffle plate 37, the shielding plate 35, the second guide plate 41 and the placement plate 42 form a cleaning chamber 4; the left inner wall of the separation and purification tank 1, the second guide plate 41 and the placement plate 42 form an oil storage chamber 5;

[0038] When in use, the output end of the first hydraulic cylinder 26 extends to drive the first baffle 27 to contact the first filter plate 22, and the output end of the second hydraulic cylinder 36 extends to drive the second baffle 37 to contact the second filter plate 32. The first telescopic rod 23 and the second telescopic rod 33 are both in a retracted state; rapeseed oil is added into the separation and purification tank 1 from the oil inlet pipeline 11, and the rapeseed oil first enters the first filter chamber 2. After entering the oil inlet hopper 21, the rapeseed oil will fall onto the first filter plate 22 for the first filtration. The larger particle residue after filtration remains on the first filter plate 22, and the rapeseed oil filtered for the first time will pass through the first filter chamber 21. The filter plate 22 enters the second filter chamber 3. Under the action of the first guide plate 31, the rapeseed oil filtered for the first time will fall onto the second filter plate 32 for the second filtration. The smaller particle residues after filtration will remain on the second filter plate 32. The rapeseed oil filtered for the second time will pass through the second filter plate 32 and enter the oil storage chamber 5. Finally, after the oil storage chamber 5 is full of oil, the rapeseed oil filtered twice is discharged from the oil outlet pipe 12 for collection. When in use, multiple filtrations can be selected, such as two filtrations, three filtrations, or even more times, wherein the aperture of the filter plate decreases from top to bottom.

[0039] During cleaning, when the residue on the first filter plate 22 and the second filter plate 32 affects the filtration, the entire device needs to be left still for 1-2 hours (it can be done at night or during a period when there is less filtering work). After the rest period, the output end of the first hydraulic cylinder 26 is started to contract to drive the first baffle 27 to leave the first filter plate 22, and the output end of the second hydraulic cylinder 36 is started to contract to drive the second baffle 37 to leave the second filter plate 32. Then, the first telescopic rod 23 is started to extend to drive the first push plate 24 to push the residue on the first filter plate 22 into the cleaning chamber 4. At the same time, the second telescopic rod 33 is started to extend to drive the second push plate 34 to push the residue on the second filter plate 32 into the cleaning chamber 4. The residue will fall onto the top of the placement plate 42 under the action of the second guide plate 41. The first telescopic rod 23 and the second telescopic rod 33 can be started appropriately to go back and forth several times to better clean the residue. After the residue is cleaned, the residue can be taken out through the cleaning pipe 43.

[0040] For further information, see Figure 2 The first push plate 24 is used to push the residue on the first filter plate 22 into the cleaning chamber 4.

[0041] For further information, see Figure 2 When the output end of the first hydraulic cylinder 26 extends to drive the first baffle 27 to contact the first filter plate 22, the fixed plate 25 and the first baffle 27 prevent rapeseed oil from entering the cleaning chamber 4; when the output end of the first hydraulic cylinder 26 contracts to drive the first baffle 27 to leave the first filter plate 22, the first push plate 24 is used to push the residue on the first filter plate 22 into the cleaning chamber 4.

[0042] For further information, see Figure 2The second push plate 34 is used to push the residue on the second filter plate 32 into the cleaning chamber 4.

[0043] For further information, see Figure 2 When the output end of the second hydraulic cylinder 36 extends to drive the second baffle 37 to contact the second filter plate 32, the shielding plate 35 and the second baffle 37 will prevent rapeseed oil from entering the cleaning chamber 4; when the output end of the second hydraulic cylinder 36 contracts to drive the second baffle 37 to leave the second filter plate 32, the second push plate 34 is used to push the residue on the second filter plate 32 into the cleaning chamber 4.

[0044] In the present embodiment, when the residue on the first filter plate 22 and the second filter plate 32 affects the filtration, the whole device needs to be quiet for 1-2 hours (it can be selected at night or during the time period when the filtering work is less). After quieting, the output end of the first hydraulic cylinder 26 is started to contract to drive the first baffle 27 to leave the first filter plate 22, and the output end of the second hydraulic cylinder 36 is started to contract to drive the second baffle 37 to leave the second filter plate 32, and then the first telescopic rod 23 is started to extend to drive the first push plate 24 to push the residue on the first filter plate 22 into the cleaning chamber 4, and at the same time, the second telescopic rod 33 is started to extend to drive the second push plate 34 to push the residue on the second filter plate 32 into the cleaning chamber 4. The residue will fall onto the top of the placement plate 42 under the action of the second guide plate 41. The first telescopic rod 23 and the second telescopic rod 33 can be appropriately started to go back and forth several times to better clean the residue. After all the residue is pushed into the cleaning chamber 4, the residue can be taken out through the cleaning pipe 43.

[0045] For further information, see Figure 2 An oil inlet pipeline 11 is provided on the top surface of the separation and purification tank 1 , and the oil inlet pipeline 11 is connected to the oil inlet hopper 21 .

[0046] In this embodiment, when in use, rapeseed oil is added into the separation and purification tank 1 from the oil inlet pipe 11, and the rapeseed oil first enters the first filter chamber 2. After entering the oil inlet hopper 21, the rapeseed oil falls onto the first filter plate 22 for the first filtration.

[0047] For further information, see Figure 2 An oil outlet pipeline 12 is provided on the bottom surface of the separation and purification tank 1 , and the oil outlet pipeline 12 is connected to the oil storage chamber 5 .

[0048] In this embodiment, after the oil storage chamber 5 is full of oil, the rapeseed oil filtered twice is collected from the oil outlet pipe 12 .

[0049] Further, please refer to the figure, the outer wall of the separation and purification tank 1 is also provided with a cleaning pipe 43, and the cleaning pipe 43 is connected to the interior of the cleaning chamber 4.

[0050] In this embodiment, after all the residues are pushed into the cleaning chamber 4, the cleaning pipe 43 is opened to take out the residues.

[0051] The working principle and use process of the present invention are as follows: when in use, the output end of the first hydraulic cylinder 26 extends to drive the first baffle plate 27 to contact the first filter plate 22, and the output end of the second hydraulic cylinder 36 extends to drive the second baffle plate 37 to contact the second filter plate 32, and the first telescopic rod 23 and the second telescopic rod 33 are both in a contracted state; rapeseed oil is added into the separation and purification tank 1 from the oil inlet pipe 11, and the rapeseed oil first enters the first filter chamber 2, and after entering the oil inlet hopper 21, the rapeseed oil will fall on the first filter plate 22 for the first filtration, and the larger particle residue after filtration will remain on the first filter plate 22, and the rapeseed oil filtered for the first time will pass through the first filter plate 22 to enter the second filter chamber 3, and under the action of the first guide plate 31, the rapeseed oil filtered for the first time will fall on the second filter plate 32 for the second filtration, and the smaller particle residue after filtration will remain on the second filter plate 32, and the rapeseed oil filtered for the second time will pass through the second filter plate 32 into the oil storage chamber 5, and finally, after the oil storage chamber 5 is full of oil, the rapeseed oil filtered twice is discharged from the oil outlet pipe 12 for collection;

[0052] During cleaning, when the residue on the first filter plate 22 and the second filter plate 32 affects the filtration, the entire device needs to be left still for 1-2 hours (it can be done at night or during a period when there is less filtering work). After the rest period, the output end of the first hydraulic cylinder 26 is started to contract to drive the first baffle 27 to leave the first filter plate 22, and the output end of the second hydraulic cylinder 36 is started to contract to drive the second baffle 37 to leave the second filter plate 32. Then, the first telescopic rod 23 is started to extend to drive the first push plate 24 to push the residue on the first filter plate 22 into the cleaning chamber 4. At the same time, the second telescopic rod 33 is started to extend to drive the second push plate 34 to push the residue on the second filter plate 32 into the cleaning chamber 4. The residue will fall onto the top of the placement plate 42 under the action of the second guide plate 41. The first telescopic rod 23 and the second telescopic rod 33 can be started appropriately to go back and forth several times to better clean the residue. After the residue is cleaned, the residue can be taken out through the cleaning pipe 43.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage separation and purification device for rapeseed oil production, characterized in that: It comprises a separation and purification tank (1); The separation and purification tank (1) is provided with a first filter chamber (2), a second filter chamber (3), a cleaning chamber (4) and an oil storage chamber (5); The first filter chamber (2) comprises an oil inlet hopper (21), a first telescopic rod (23) and a fixed plate (25); a first filter plate (22) is arranged below the oil inlet hopper (21); the first telescopic rod (23) is arranged on the outer wall of the separation and purification tank (1); the telescopic end of the first telescopic rod (23) is located inside the first filter chamber (2); the telescopic end of the first telescopic rod (23) is connected to a first push plate (24); the first push plate (24) is slidably connected to the top surface of the first filter plate (22); the fixed plate (25) is an inverted L-shaped structure; a first hydraulic cylinder (26) is arranged inside the fixed plate (25); the output end of the first hydraulic cylinder (26) is connected to a first baffle (27); The second filter chamber (3) comprises a first guide plate (31), a second telescopic rod (33) and a shielding plate (35), wherein the first guide plate (31) is arranged on the bottom surface of the first filter plate (22), a second filter plate (32) is arranged below the first guide plate (31), the filter aperture of the second filter plate (32) is smaller than the filter aperture of the first filter plate (22), the second telescopic rod (33) is arranged on the outer wall of the separation and purification tank (1), the telescopic end of the second telescopic rod (33) is located inside the second filter chamber (3), the telescopic end of the second telescopic rod (33) is connected to a second push plate (34), the second push plate (34) is slidably connected to the top surface of the second filter plate (32), the shielding plate (35) is fixedly arranged on the bottom surface of the first filter plate (22) and is away from the second telescopic rod (33), a second hydraulic cylinder (36) is arranged inside the shielding plate (35), and the output end of the second hydraulic cylinder (36) is connected to a second baffle (37); The cleaning chamber (4) comprises a second guide plate (41) and a placement plate (42), wherein the second guide plate (41) is arranged on the bottom surface of the second filter plate (32), and the placement plate (42) is close to the bottom surface of the inner wall of the separation and purification tank (1) and connected to the inner wall of the separation and purification tank (1); The oil storage chamber (5) is located below the second filtering chamber (3) and is used for storing filtered rapeseed oil.

2. A multi-stage separation and purification device for rapeseed oil production according to claim 1, characterized in that: The first push plate (24) is used to push the residue on the first filter plate (22) into the interior of the cleaning chamber (4).

3. A multi-stage separation and purification device for rapeseed oil production according to claim 2, characterized in that: When the output end of the first hydraulic cylinder (26) extends to drive the first baffle plate (27) to contact the first filter plate (22), the fixed plate (25) and the first baffle plate (27) prevent rapeseed oil from entering the interior of the cleaning chamber (4); when the output end of the first hydraulic cylinder (26) contracts to drive the first baffle plate (27) away from the first filter plate (22), the first push plate (24) is used to push the residue on the first filter plate (22) into the interior of the cleaning chamber (4).

4. A multi-stage separation and purification device for rapeseed oil production according to claim 1, characterized in that: The second push plate (34) is used to push the residue on the second filter plate (32) into the interior of the cleaning chamber (4).

5. A multi-stage separation and purification device for rapeseed oil production according to claim 4, characterized in that: When the output end of the second hydraulic cylinder (36) extends to drive the second baffle plate (37) to contact the second filter plate (32), the shielding plate (35) and the second baffle plate (37) prevent rapeseed oil from entering the interior of the cleaning chamber (4); when the output end of the second hydraulic cylinder (36) contracts to drive the second baffle plate (37) to leave the second filter plate (32), the second push plate (34) is used to push the residue on the second filter plate (32) into the interior of the cleaning chamber (4).

6. A multi-stage separation and purification device for rapeseed oil production according to claim 1, characterized in that: The top surface of the separation and purification tank (1) is provided with an oil inlet pipeline (11), and the oil inlet pipeline (11) is connected to the oil inlet hopper (21).

7. A multi-stage separation and purification device for rapeseed oil production according to claim 1, characterized in that: The bottom surface of the separation and purification tank (1) is provided with an oil outlet pipeline (12), and the oil outlet pipeline (12) is connected to the oil storage chamber (5).

8. A multi-stage separation and purification device for rapeseed oil production according to claim 1, characterized in that: The outer wall of the separation and purification tank (1) is also provided with a cleaning pipe (43), and the cleaning pipe (43) is connected to the interior of the cleaning chamber (4).

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