A raw material purifying device for low-temperature cold pressing of linseed oil

Abstract

This invention discloses a raw material purification device for low-temperature cold pressing of flaxseed oil, relating to the field of flaxseed raw material purification technology. The device includes a housing with a lid fixed to its upper end. A coarse selection box is located above the lid, and a sieve plate is fixed inside the coarse selection box at an angle. A guide hopper communicating with the interior of the coarse selection box is fixed to the bottom of the box. A receiving hopper, fixedly connected to the lid, is inserted through the upper end of the lid, and the guide hopper is inserted into the inner side of the receiving hopper. Two first belt rollers arranged horizontally are rotatably mounted inside the housing, and a conveying mechanism is provided on the two first belt rollers. This invention has significant advantages in impurity removal effect, operational continuity, and efficiency, enabling efficient, comprehensive, and continuous removal of various impurities from flaxseed raw materials, thus providing a high-quality raw material guarantee for low-temperature cold pressing.

Description

Technical Field

[0001] This invention relates to the field of flaxseed raw material purification technology, and in particular to a raw material purification device for low-temperature cold pressing of flaxseed oil. Background Technology

[0002] Flaxseed oil, rich in various nutrients beneficial to the human body, such as alpha-linolenic acid and other unsaturated fatty acids, is increasingly widely used in health foods, pharmaceuticals, and cosmetics, with market demand continuing to grow. Low-temperature cold pressing, a key technology for obtaining high-quality flaxseed oil, maximizes the preservation of nutrients and natural flavor in flaxseeds at relatively low temperatures, avoiding the destruction of active substances such as unsaturated fatty acids by high temperatures, thus producing flaxseed oil with higher nutritional value and superior quality.

[0003] However, during the harvesting, storage, and transportation of flaxseed, various impurities inevitably become mixed in. These impurities are diverse in type and nature, and have a serious impact on the subsequent low-temperature cold pressing process and the quality of flaxseed oil. Large particles such as straw fragments and stones not only wear down key components of the cold pressing equipment, such as the pressing chamber and screw, shortening the equipment's lifespan and increasing maintenance costs, but may also clog the oil outlet during cold pressing, affecting oil extraction efficiency. The presence of metallic impurities such as iron filings generates heat through friction with the equipment during cold pressing; localized high temperatures may destroy the nutrients in the flaxseed, and these metallic impurities may also mix into the flaxseed oil, reducing its purity and quality, and even posing potential health hazards. Light impurities such as dust, broken leaves, and shriveled seeds affect the purity of the flaxseed raw material, potentially causing the oil to darken in color and develop an abnormal odor during cold pressing, affecting the sensory quality and market acceptance of the flaxseed oil. Therefore, efficient and thorough purification of flaxseed raw materials before low-temperature cold pressing to remove various impurities is an important prerequisite for ensuring the smooth progress of the low-temperature cold pressing process and obtaining high-quality flaxseed oil.

[0004] Currently, existing flaxseed raw material purification equipment has many limitations in terms of structure and function. Regarding impurity removal methods, most devices employ a single purification structure, making it difficult to comprehensively and effectively remove impurities of different properties and particle sizes. For example, some devices only use simple sieves for screening, which can only remove some large particles of impurities, while failing to effectively separate metallic impurities such as iron filings and lightweight impurities. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a raw material purification device for low-temperature cold pressing of flaxseed oil.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A raw material purification device for low-temperature cold pressing of flaxseed oil includes a device box. A box cover is fixed to the upper end of the device box. A coarse selection box is located above the box cover. A sieve plate is fixed inside the coarse selection box and is inclined. A guide hopper communicating with the interior of the coarse selection box is fixed to the bottom of the coarse selection box. A receiving hopper, fixedly connected to the box cover, is inserted through the upper end of the box cover. The guide hopper is inserted into the inner side of the receiving hopper. Two first belt rollers arranged horizontally are rotatably mounted inside the device box. A conveying mechanism is provided on the two first belt rollers. Vibration mechanisms cooperating with the conveying mechanisms are provided on the inner walls of opposite sides of the device box. An iron removal mechanism is provided in front of the two first belt rollers. A discharge hopper is provided through the side wall of the device box away from the coarse selection box. The discharge hopper is located below the conveying mechanism, and a sorting mechanism is provided at the bottom of the discharge hopper.

[0007] As a further improvement of the present invention, the conveying mechanism includes a mesh belt, which is fitted onto two first belt rollers, and uniformly arranged crossbars are fixed on the surface of the mesh belt.

[0008] As a further improvement of the present invention, the vibration mechanism includes a mounting plate fixedly connected to the inner wall of the device box. Guide plates are fixedly connected to both ends of the mounting plate. The guide plates are inclined. Two grooves are provided on the upper surface of the mounting plate. An elastic cable is fixed inside the groove and is flush with the upper surface of the mounting plate. Two protrusions are fixed on the upper surface of the mounting plate. The two protrusions are respectively located on the left side of the two grooves.

[0009] As a further improvement of the present invention, the iron removal mechanism includes two second belt rollers rotatably installed inside the device box and arranged in a horizontal direction. The same magnetic belt is fitted on the two second belt rollers. An isolation belt is fitted on the outer side of the magnetic belt. A guide roller is provided below each of the two second belt rollers, and the isolation belt passes around the guide roller. A magnetic shielding plate is fixed inside the device box and is located below the magnetic belt. A waste discharge hopper is fixed inside the device box and is located below the isolation belt. The waste discharge hopper penetrates the inner wall of the device box and extends to the outside of the device box. Baffles are fixed on both sides of the upper part of the waste discharge hopper.

[0010] As a further improvement of the present invention, the sorting mechanism includes a blower hood fixed to the bottom of the discharge hopper, an air guide pipe connected to the side wall of the blower hood, and a fan connected to the end of the air guide pipe away from the blower hood.

[0011] As a further improvement of the present invention, a first motor and a second motor are installed on the outer wall of the device box. The output shaft of the first motor passes through the device box and is fixed to the end of one of the first belt rollers. The output shaft of the second motor passes through the device box and is fixed to the end of one of the second belt rollers.

[0012] As a further improvement of the present invention, a collection box is provided on one side of the blower hood, and the collection box is located below the discharge hopper.

[0013] As a further improvement of the present invention, the bottom of the guide hopper is fixed with two fixing plates, the lower end of the fixing plates is fixed to the upper end of the box cover, and the bottom of the device box is fixed with four fixing rods, the lower ends of the four fixing rods are fixed with the same base plate.

[0014] As a further improvement of the present invention, a feed hopper communicating with the interior of the coarse selection box is fixed at the upper end of the box cover. The feed hopper is located above the high side of the screen plate. An outlet pipe communicating with the interior of the coarse selection box is fixed on the side wall of the coarse selection box. The outlet pipe is close to the low side of the screen plate.

[0015] The beneficial effects of this invention are: This invention utilizes a three-stage purification structure—rough selection, iron removal, and air separation—to achieve targeted removal of various impurities from flaxseed raw materials. First, inclined sieves are used to rough select large particles (such as straw fragments and pebbles). Then, a mesh belt and magnetic belt work together to effectively adsorb and separate metallic impurities such as iron filings from the raw materials. Finally, airflow generated by a blower and a blower hood blows light impurities (such as dust, broken leaves, and shriveled seeds) away from the flaxseeds. This multi-stage synergistic purification method allows impurities of different properties and particle sizes to be removed step by step with precision, significantly improving the overall purity of the flaxseed raw materials and providing a high-quality raw material guarantee for subsequent low-temperature cold pressing.

[0016] This invention features a unique vibration mechanism that works in conjunction with the conveying mechanism. When the conveyor belt moves the crossbar, the crossbar contacts and is lifted by the arc surface of the protrusion. After passing the vertical surface of the protrusion, it falls rapidly and strikes the elastic cable, causing the crossbar and the entire conveyor belt to vibrate up and down. This vibration not only prevents flax seeds from accumulating and clogging on the conveyor belt, but more importantly, it keeps the flax seeds in a continuous "shaking" state. This makes it easier for iron filings mixed in with the seeds to move downwards and pass through the mesh of the conveyor belt, greatly increasing the probability of contact between the iron filings and the magnetic strip. This significantly improves the efficiency and uniformity of iron removal, avoiding the problem of uneven iron removal effects found in traditional static or simple vibration methods.

[0017] The iron removal mechanism of this invention adopts a combination of a magnetic belt and a separating belt. The magnetic belt is responsible for adsorbing the iron filings that leak down. When the magnetic belt with iron filings adsorbed moves to the position where it separates from the separating belt (that is, it separates at the guide roller due to the change of path), the magnetic attraction of the magnetic belt to the iron filings will be significantly weakened due to the increased distance. The iron filings will then automatically detach from the separating belt under the action of gravity and fall into the waste hopper for discharge. This realizes a continuous and automated process of "adsorption-transfer-automatic peeling-collection" of iron filings, without the need for machine shutdown for cleaning, thus ensuring the continuity and efficiency of the iron removal operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a raw material purification device for low-temperature cold pressing of flaxseed oil proposed in this invention. Figure 2 This is a schematic diagram of the coarse selection box and sieve plate of a raw material purification device for low-temperature cold pressing of flaxseed oil proposed in this invention; Figure 3 This is a schematic diagram of the structure of the first belt roller, first motor, second motor, conveying mechanism, vibration mechanism, and iron removal mechanism of a raw material purification device for low-temperature cold pressing of flaxseed oil proposed in this invention. Figure 4 This is a schematic diagram of the vibration mechanism of a raw material purification device for low-temperature cold pressing of flaxseed oil proposed in this invention. Figure 5 This is a schematic diagram of the impurity discharge hopper and baffle of a raw material purification device for low-temperature cold pressing of flaxseed oil proposed in this invention; Figure 6 This is a schematic diagram of the magnetic belt and the isolation belt of a raw material purification device for low-temperature cold pressing of flaxseed oil proposed in this invention.

[0019] In the diagram: 1. Device box, 2. Box cover, 3. Fixing plate, 4. Guide hopper, 5. Waste discharge pipe, 6. Coarse separation box, 7. Box cover, 8. Feed hopper, 9. Receiving hopper, 10. Discharge hopper, 11. Collection box, 12. Blower hood, 13. Air guide pipe, 14. Fan, 15. Base plate, 16. Fixing rod, 17. First motor, 18. Second motor, 19. Screen plate, 20. First belt roller, 21. Mesh belt, 22. Crossbar, 23. Mounting plate, 24. Second belt roller, 25. Magnetic belt, 26. Isolation belt, 27. Guide roller, 28. Magnetic shielding plate, 29. Waste discharge hopper, 30. Baffle, 31. Protrusion, 32. Groove, 33. Elastic cable, 34. Guide plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] See Figures 1-6A raw material purification device for low-temperature cold pressing of flaxseed oil includes a device box 1, a box cover 2 fixed to the upper end of the device box 1, a coarse selection box 6 above the box cover 2, a sieve plate 19 fixed inside the coarse selection box 6, the sieve plate 19 being inclined, the sieve plate 19 being able to remove large particulate impurities (such as straw fragments and stones) from the flaxseed, thus achieving coarse selection of the flaxseed, a feed hopper 8 connected to the interior of the coarse selection box 6 fixed to the upper end of the box cover 7, the feed hopper 8 being located above the high side of the sieve plate 19, an impurity discharge pipe 5 connected to the interior of the coarse selection box 6 fixed to the side wall of the coarse selection box 6, the impurity discharge pipe 5 being close to the low side of the sieve plate 19, the large particulate impurities in the flaxseed being discharged through the impurity discharge pipe 5.

[0022] The bottom of the coarse selection box 6 is fixed with a guide hopper 4 that communicates with the inside of the coarse selection box 6. The upper end of the box cover 2 is provided with a receiving hopper 9 that is fixedly connected to the box cover 2. The guide hopper 4 is inserted into the inside of the receiving hopper 9. The bottom of the guide hopper 4 is fixed with two fixing plates 3. The lower end of the fixing plates 3 is fixed to the upper end of the box cover 2. The bottom of the device box 1 is fixed with four fixing rods 16. The lower end of the four fixing rods 16 is fixed with the same base plate 15.

[0023] See Figure 3 Inside the device box 1, two first belt rollers 20 arranged in a horizontal direction are rotatably installed. The two first belt rollers 20 are equipped with a material conveying mechanism, which includes a mesh belt 21. The mesh belt 21 has a certain toughness and can meet the requirements of deformation and vibration. The mesh belt 21 is fitted on the two first belt rollers 20. The surface of the mesh belt 21 is fixed with evenly arranged crossbars 22.

[0024] See Figure 4 The inner walls of the device box 1 on both sides are equipped with vibration mechanisms that cooperate with the conveying mechanism. Each vibration mechanism includes a mounting plate 23 fixedly connected to the inner wall of the device box 1. Guide plates 34 are fixedly connected to both ends of the mounting plate 23. The guide plates 34 are inclined. Two grooves 32 are provided on the upper surface of the mounting plate 23. Elastic cables 33 are fixed inside the grooves 32 and are flush with the upper surface of the mounting plate 23. Two protrusions 31 are fixed to the upper surface of the mounting plate 23. The two protrusions 31 are located to the left of the two grooves 32, and each protrusion 31 has an arc surface and a vertical surface. When the first belt... When the roller 20 drives the mesh belt 21 to rotate, the mesh belt 21 can drive the crossbar 22 to move. When the crossbar 22 contacts the arc surface of the protrusion 31, the protrusion 31 can push the crossbar 22 upward. When the crossbar 22 moves to the vertical surface of the protrusion 31, the crossbar 22 will fall quickly and contact the elastic cord 33. Since the elastic cord 33 is elastic, the crossbar 22 will vibrate up and down, which in turn drives the mesh belt 21 to vibrate, which makes the flax seeds on the mesh belt 21 vibrate, and makes the iron filings in the flax seeds move downward more easily, which helps to separate the iron filings from the flax seeds.

[0025] See Figure 3 An iron removal mechanism is provided before the two first belt rollers 20. The iron removal mechanism includes two second belt rollers 24 rotatably mounted inside the device housing 1 and arranged horizontally. The same magnetic belt 25 is fitted on the two second belt rollers 24. An isolation belt 26 is fitted on the outside of the magnetic belt 25. Guide rollers 27 are provided below the two second belt rollers 24, and the isolation belt 26 passes around the guide rollers 27. A magnetic shielding plate 28 is fixed inside the device housing 1. The magnetic shielding plate 28 is located below the magnetic belt 25. The magnetic shielding plate 28 can play a magnetic shielding role and can effectively shield the magnetic belt 25 from secondary adsorption of the stripped iron filings that are falling, ensuring the reliability of iron filings stripping and collection, and thus preventing the magnetic belt 25 from adsorbing the iron filings on the isolation belt 26 below. The iron filings are affected, allowing them to detach smoothly from the isolation belt 26. A waste discharge hopper 29 is fixed inside the device box 1, located below the isolation belt 26. The waste discharge hopper 29 penetrates the inner wall of the device box 1 and extends to the outside of the device box 1. Baffles 30 are fixed on both sides of the upper part of the waste discharge hopper 29. The iron filings in the flax seeds on the mesh belt 21 can be drained through the mesh belt 21. When the magnetic belt 25 is attached to the isolation belt 26, the magnetism of the magnetic belt 25 is used to attract the iron filings to the surface of the isolation belt 26, which can separate the iron filings from the flax seeds. When the isolation belt 26 is separated from the magnetic belt 25, the magnetic attraction of the magnetic belt 25 to the iron filings weakens, and the iron filings can detach from the isolation belt 26 and fall into the waste discharge hopper 29 for discharge.

[0026] A discharge hopper 10 is installed through the side wall of the device box 1 away from the coarse selection box 6. The discharge hopper 10 is located below the conveying mechanism. A sorting mechanism is provided at the bottom of the discharge hopper 10. The sorting mechanism includes a blower hood 12 fixed to the bottom of the discharge hopper 10. An air guide pipe 13 is connected to the side wall of the blower hood 12. A fan 14 is connected to the end of the air guide pipe 13 away from the blower hood 12. By starting the fan 14, air can be introduced into the blower hood 12 through the air guide pipe 13. When the discharge hopper 10 discharges flax seeds, the blower hood 12 blows air onto the flax seeds, causing light impurities (such as dust, broken leaves, and shriveled seeds) in the flax seeds to be blown away, thereby achieving the separation of light impurities. Furthermore, a collection box 11 is provided on one side of the blower hood 12. The collection box 11 is located below the discharge hopper 10 and can be used to collect flax seeds.

[0027] A first motor 17 and a second motor 18 are installed on the outer wall of the device box 1. The output shaft of the first motor 17 passes through the device box 1 and is fixed to the end of one of the first belt rollers 20. By starting the first motor 17, the first belt roller 20 can be driven to rotate. The output shaft of the second motor 18 passes through the device box 1 and is fixed to the end of one of the second belt rollers 24. By starting the second motor 18, the second belt roller 24 can be driven to rotate.

[0028] When using this invention, the flaxseed raw material to be purified is first fed into the feed hopper 8 above the box cover 2. The flaxseed raw material slides along the screen plate 19 to the lower side. Large particles of impurities, such as straw fragments and stones, cannot pass through the screen holes of the screen plate 19 and remain on the surface of the screen plate 19. They slide along the inclined direction of the screen plate 19 to the lower side and are finally discharged through the impurity outlet pipe 5 connected to the side wall of the coarse selection box 6, thus completing the coarse selection of flaxseed to remove large particles of impurities. After being coarsely selected, the flax seeds pass through the sieve holes of the sieve plate 19 and fall into the guide hopper 4 at the bottom of the coarse selection box 6. The flax seeds then enter the receiving hopper 9 through the guide hopper 4 and further fall onto the mesh belt 21 inside the device box 1. The first motor 17 inside the device box 1 starts, and its output shaft drives one of the fixed first belt rollers 20 to rotate. This first belt roller 20 drives the mesh belt 21 mounted on it to rotate through friction. Simultaneously, the mesh belt 21 drives the other first belt roller 20 to rotate synchronously. As the mesh belt 21 rotates, the flax seeds are... The flax seeds are conveyed into the device box 1 and laid flat on the surface of the mesh belt 21. When the mesh belt 21 moves the crossbar 22 to contact the arc surface of the protrusion 31, the protrusion 31 pushes the crossbar 22 upward. When the crossbar 22 moves to the vertical surface of the protrusion 31, the crossbar 22 falls quickly and contacts the elastic cord 33. Because the elastic cord 33 is elastic, the crossbar 22 vibrates up and down, which in turn drives the mesh belt 21 to vibrate as a whole, causing the flax seeds on the mesh belt 21 to vibrate. The iron filings mixed in the flax seeds are more likely to move downward due to the vibration. At the same time, the second motor 18 inside the device box 1 starts, and its output shaft drives one of the second belt rollers 24 fixed thereto to rotate. The second belt roller 24 drives the magnetic belt 25 mounted on it to rotate through friction. The magnetic belt 25 simultaneously drives the other second belt roller 24 to rotate synchronously. The friction drives the outer isolation belt 26 to rotate synchronously through the magnetic belt 25. When the flax seeds on the mesh belt 21 vibrate and cause iron filings to fall, the iron filings pass through the mesh belt 21 and come into contact with the rotating magnetic belt 25. The magnetism of the magnetic belt 25 attracts the iron filings to the surface of the isolation belt 26. When the isolation belt 26 separates from the magnetic belt 25, the magnetic attraction of the magnetic belt 25 to the iron filings weakens. The iron filings detach from the isolation belt 26 and fall into the waste discharge hopper 29 fixed inside the device box 1. The waste discharge hopper 29 penetrates the inner wall of the device box 1 and extends to the outside of the device box 1. The iron filings are discharged through the waste discharge hopper 29, realizing the separation of iron filings from flax seeds. After iron removal, the flaxseeds continue to move along the conveyor belt 21 to the side of the device box 1 away from the coarse selection box 6, and finally fall through the discharge hopper 10. The blower 14 is started, and the blower 14 introduces air into the blower hood 12 through the air duct 13. The blower hood 12 blows the flaxseeds falling from the discharge hopper 10. Light impurities in the flaxseeds, such as dust, broken leaves, and shriveled seeds, are blown away by the air due to their light weight, thus achieving the separation of light impurities. The flaxseeds that meet the requirements are collected through the collection box 11, completing the purification process of the flaxseed raw materials.

[0029] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A raw material purification device for low-temperature cold pressing of flaxseed oil, characterized in that, The device includes a housing (1), with a housing cover (2) fixed to the upper end of the housing (1). A coarse selection box (6) is provided above the housing cover (2). A sieve plate (19) is fixed inside the coarse selection box (6). The sieve plate (19) is inclined. A guide hopper (4) communicating with the inside of the coarse selection box (6) is fixed to the bottom of the coarse selection box (6). A receiving hopper (9) fixedly connected to the housing cover (2) is provided through the upper end of the housing cover (2). The guide hopper (4) is inserted into the inside of the receiving hopper (9). (1) has two first belt rollers (20) installed inside in a horizontal direction. The two first belt rollers (20) are provided with a material conveying mechanism. The inner walls of the two opposite sides of the device box (1) are provided with a vibration mechanism that cooperates with the material conveying mechanism. An iron removal mechanism is provided in front of the two first belt rollers (20). A discharge hopper (10) is provided through the side wall of the device box (1) away from the coarse selection box (6). The discharge hopper (10) is located below the material conveying mechanism. A sorting mechanism is provided at the bottom of the discharge hopper (10).

2. The raw material purification device for low-temperature cold pressing of flaxseed oil according to claim 1, characterized in that, The material conveying mechanism includes a mesh belt (21), which is fitted on two first belt rollers (20), and uniformly arranged crossbars (22) are fixed on the surface of the mesh belt (21).

3. The raw material purification device for low-temperature cold pressing of flaxseed oil according to claim 2, characterized in that, The vibration mechanism includes a mounting plate (23) fixedly connected to the inner wall of the device box (1). Both ends of the mounting plate (23) are fixedly connected to guide plates (34). The guide plates (34) are inclined. The upper surface of the mounting plate (23) is provided with two grooves (32). An elastic cable (33) is fixed inside the groove (32), and the elastic cable (33) is flush with the upper surface of the mounting plate (23). The upper surface of the mounting plate (23) is fixed with two protrusions (31). The two protrusions (31) are located on the left side of the two grooves (32).

4. The raw material purification device for low-temperature cold pressing of flaxseed oil according to claim 2, characterized in that, The iron removal mechanism includes two second belt rollers (24) rotatably installed inside the device box (1) and arranged in the horizontal direction. The same magnetic belt (25) is fitted on the two second belt rollers (24). An isolation belt (26) is fitted on the outside of the magnetic belt (25). A guide roller (27) is provided below the two second belt rollers (24), and the isolation belt (26) passes around the guide roller (27). A magnetic shielding plate (28) is fixed inside the device box (1). The magnetic shielding plate (28) is located below the magnetic belt (25). A waste discharge hopper (29) is fixed inside the device box (1). The waste discharge hopper (29) is located below the isolation belt (26). The waste discharge hopper (29) penetrates the inner wall of the device box (1) and extends to the outside of the device box (1). Baffles (30) are fixed on both sides of the upper part of the waste discharge hopper (29).

5. The raw material purification device for low-temperature cold pressing of flaxseed oil according to claim 1, characterized in that, The sorting mechanism includes a blower hood (12) fixed at the bottom of the discharge hopper (10), and a guide pipe (13) is connected to the side wall of the blower hood (12). A blower (14) is connected to the end of the guide pipe (13) away from the blower hood (12).

6. The raw material purification apparatus for low-temperature cold pressing of flaxseed oil according to claim 4, characterized in that, A first motor (17) and a second motor (18) are installed on the outer wall of the device box (1). The output shaft of the first motor (17) passes through the device box (1) and is fixed at the end of one of the first belt rollers (20). The output shaft of the second motor (18) passes through the device box (1) and is fixed at the end of one of the second belt rollers (24).

7. The raw material purification apparatus for low-temperature cold pressing of flaxseed oil according to claim 5, characterized in that, A collection box (11) is provided on one side of the blower hood (12), and the collection box (11) is located below the discharge hopper (10).

8. The raw material purification apparatus for low-temperature cold pressing of flaxseed oil according to claim 1, characterized in that, The bottom of the feed hopper (4) is fixed with two fixing plates (3), the lower end of the fixing plate (3) is fixed to the upper end of the box cover (2), and the bottom of the device box (1) is fixed with four fixing rods (16), the lower ends of the four fixing rods (16) are fixed with the same base plate (15).

9. A raw material purification device for low-temperature cold pressing of flaxseed oil according to claim 1, characterized in that, The upper end of the box cover (7) is fixed with a feed hopper (8) that communicates with the inside of the coarse selection box (6). The feed hopper (8) is located above the high side of the sieve plate (19). The side wall of the coarse selection box (6) is fixed with a waste discharge pipe (5) that communicates with the inside of the coarse selection box (6). The waste discharge pipe (5) is close to the low side of the sieve plate (19).

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