A filtering and purifying device for rapeseed oil processing

Abstract

This invention relates to the field of filtration and purification technology, specifically to a filtration and purification device for rapeseed oil processing, comprising: a filter cylinder, a pressure regulating component, a support component, and a drive mechanism. During the filtration process, the drive mechanism drives the support component to periodically change the support position on the filter screen, causing the originally supported areas on the filter screen to gradually detach from the support state, while adjacent unsupported areas sequentially enter the support state. Therefore, through the alternating action of the supported and unsupported areas on the filter screen, the locally concentrated stress on the filter screen is distributed as evenly as possible across the entire filter screen, making the stress conditions on each part of the filter screen more consistent. This effectively avoids deformation caused by long-term concentrated stress on a fixed area, thereby extending the overall service life of the filter screen.

Description

Technical Field

[0001] This invention relates to the field of filtration and purification technology, and in particular to a filtration and purification device for rapeseed oil processing. Background Technology

[0002] Rapeseed oil is one of the main edible vegetable oils for Chinese residents, and the filtration and purification process during its processing directly affects food safety and flavor. In the refining stage, pressure oil filters, typically using bags or filter cloths, are used to deeply filter the crude oil, removing impurities such as colloids, phospholipids, and tiny particles. This type of equipment is widely used in small and medium-sized oil processing plants and large-scale refining workshops, and is a key piece of equipment for achieving oil purification.

[0003] With the development of the oil and fat industry, oil filtration technology is also constantly evolving. Traditional fixed basket-supported oil filters are widely used due to their simple structure and low cost. In this type of equipment, the filter bag is placed in a rigid metal basket. A stable pressure difference is created by introducing compressed air into the sealed chamber. The pressurized oil penetrates the filter cloth under pressure, while impurities are trapped on the surface of the filter cloth to form a filter cake.

[0004] However, metal mesh baskets typically have multiple filter holes, resulting in two mechanical zones on the filter cloth under pressure: a supported zone and a non-supported zone. The supported zone corresponds to the solid part of the metal mesh basket, providing effective support for the filter cloth; the non-supported zone corresponds to the filter hole area and lacks effective support. Under continuous high pressure, oil is more likely to penetrate through the unsupported zone, causing the filter cloth in this area to bear greater tensile stress and remain under high stress for a long time. Meanwhile, the filter cloth in the supported zone, because it is in contact with the metal mesh basket, experiences less stress due to the dispersed stress. This uneven distribution of tensile stress leads to uneven fatigue wear rates in different areas of the filter cloth. Stress is relatively concentrated in the non-supported zone, ultimately causing localized tensile deformation or even tearing first, significantly shortening the overall service life of the filter cloth and increasing production costs and the frequency of downtime for replacement. Summary of the Invention

[0005] Therefore, it is necessary to provide a filtration and purification device for rapeseed oil processing to address the problem that current oil filtration devices cannot effectively balance the stress state of various parts of the filter cloth, resulting in a shortened filter cloth life.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A filtration and purification device for rapeseed oil processing includes:

[0008] A filter cylinder, wherein a material filtration chamber is formed inside the filter cylinder, and a filter screen is provided inside the material filtration chamber, the filter screen being used to filter and purify oil.

[0009] A pressure regulating component, used to adjust the pressure in the material filtration chamber;

[0010] A support assembly is disposed inside the material filtration chamber to support and fix the filter screen;

[0011] The drive mechanism is used to drive the support component to periodically change the support position on the filter screen during the filtration process.

[0012] Furthermore, the support assembly includes a sealing ring, which is coaxially disposed inside the filter cylinder and is used to fix and tension the filter screen.

[0013] Furthermore, the support assembly also includes a base plate and a swing unit; the base plate is coaxially fixed inside the filter cylinder, and multiple oil filter holes are formed on the base plate for oil flow; the swing unit includes multiple sets of evenly spaced swing rods, which are circumferentially distributed around the central axis of the filter cylinder on the base plate, and the swing rods are capable of rotating around the axial direction of the filter cylinder; the spacing between adjacent swing rods increases radially along the base plate towards the inner wall of the filter cylinder; the driving mechanism can drive the swing rods to rotate around the axial direction of the filter cylinder to change the support position of the filter screen.

[0014] Furthermore, the driving mechanism includes a motor, gears, and two sets of transmission units, which are symmetrically arranged along the central axis of the filter cylinder; a fixing ring is fixedly provided in the middle of the base plate, and the gears are rotatably connected to the fixing rings; the motor is used to drive the gears to rotate around their own axis; the motor transmits power to the two sets of transmission units through the gears, and the transmission units are used to drive the swing rod to rotate.

[0015] Furthermore, each of the transmission units includes a rotating ring, a drive rod, and a spring plate. The rotating ring is coaxially rotatably connected to the fixed ring. Multiple gear teeth are fixedly arranged on the rotating ring, and these teeth are evenly distributed circumferentially around the central axis of the rotating ring. The gear teeth mesh with the gear, allowing the rotating ring to rotate axially around the fixed ring. The drive rod is disposed between the filter screen and the swing rod, and is fixedly connected to the rotating ring, extending radially along the filter cylinder. The spring plate is fixedly connected to the drive rod and is used to intermittently push the swing rod to rotate.

[0016] Furthermore, the support assembly also includes multiple sets of evenly spaced base rods, which are circumferentially distributed between the base plate and the swing rod around the central axis of the filter cylinder; each set of base rods is fixedly connected to the fixing ring and the base plate; the spacing between adjacent base rods increases radially towards the inner wall of the filter cylinder along the base plate; a limiting block is fixedly provided on each set of base rods, which extends axially away from the base plate along the filter cylinder; a sliding groove is provided on each set of swing rods, which bends and extends axially around the filter cylinder, and each set of limiting blocks slides in accordance with each set of sliding grooves to limit the rotation range of the swing rod.

[0017] Furthermore, it also includes a limiting ring, which is used to limit the displacement of the swing rod along the axial direction of the filter cylinder.

[0018] Furthermore, the transmission unit also includes an arc-shaped plate and two sets of scrapers; the arc-shaped plate extends radially along the filter cylinder and is fixedly connected to the rotating ring; along the axial direction of the filter cylinder, the arc-shaped plate and the drive rod are spaced apart, and the opening of the arc-shaped plate faces the drive rod and the bottom plate; the two side walls of the arc-shaped plate extend in a direction away from each other and close to the bottom plate; the radial dimension of the arc-shaped plate in the filter cylinder gradually increases in a direction away from the fixed ring along the axial direction of the drive rod; the two sets of scrapers are slidably connected to the two side walls of the arc-shaped plate and can slide along the extension direction of the side walls; the scrapers always abut against the surface of the filter screen to scrape off impurities attached to the filter screen.

[0019] Furthermore, each of the scrapers is equipped with a spring; one end of the spring is fixedly connected to the scraper, and the other end is fixedly connected to the arc-shaped plate. The spring force always causes the scraper to slide away from the arc-shaped plate. The spring force can be adjusted according to the thickness and hardness of the impurities on the filter screen surface.

[0020] Furthermore, the drive mechanism also includes a waterproof cover to prevent materials from entering the motor.

[0021] The beneficial effects of this invention are:

[0022] This invention provides a filtration and purification device for rapeseed oil processing, comprising a filter cylinder, a pressure regulating component, a support component, and a drive mechanism. The filter cylinder forms a material filtration chamber, within which a filter screen for purifying the oil is installed. The pressure regulating component adjusts the pressure within the material filtration chamber to achieve the pressure required for material filtration and purification. The support component is located inside the material filtration chamber and supports and fixes the filter screen. During filtration, the drive mechanism periodically changes the support position of the support component on the filter screen, causing the originally supported areas on the filter screen to gradually detach from the support state, while adjacent unsupported areas sequentially enter the support state. Therefore, through the alternating action of the supported and unsupported areas on the filter screen, the locally concentrated stress on the filter screen is distributed as evenly as possible across the entire filter screen, making the stress conditions on each part of the filter screen more consistent. This effectively avoids deformation caused by long-term concentrated stress on a fixed area, thereby extending the overall service life of the filter screen. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a rapeseed oil processing filtration and purification device provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 The main view;

[0025] Figure 3 for Figure 2 A sectional view along section AA;

[0026] Figure 4 for Figure 3 A structural schematic diagram of the middle filter screen, support components, and drive mechanism;

[0027] Figure 5 for Figure 4 Top view;

[0028] Figure 6 for Figure 5 A sectional view along section BB;

[0029] Figure 7 for Figure 6 A magnified view of part A in the diagram;

[0030] Figure 8 for Figure 4 A schematic diagram of the structure with the sealing ring hidden;

[0031] Figure 9 for Figure 8 A schematic diagram of the structure of the hidden filter screen;

[0032] Figure 10 for Figure 9 Top view;

[0033] Figure 11 for Figure 10 A sectional view along section CC;

[0034] Figure 12 for Figure 11 A magnified view of part B in the diagram;

[0035] Figure 13 for Figure 8 Exploded view.

[0036] in:

[0037] 101. Filter cartridge; 102. Cover plate; 103. Mounting housing; 104. Material filtration chamber; 105. Oil holding chamber; 111. Material pump inlet pipe; 112. Pump; 113. Feed pipe; 114. Discharge pipe; 115. Drain pipe; 116. Vent pipe; 117. Pressure gauge;

[0038] 201. Base plate; 202. Filter screen; 203. Swing rod; 204. Support area; 205. Non-support area; 206. Base rod; 207. Limiting block; 208. Sliding groove; 211. Waterproof cover; 212. Fixing plate; 213. Fixing ring; 214. Motor; 215. Gear; 221. Limiting ring;

[0039] 300. Transmission unit; 301. Rotating ring; 302. Arc plate; 303. Scraper; 304. Spring; 305. Drive rod; 306. Spring piece;

[0040] 400. Sealing ring; 401. Connecting rod. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0042] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] The following reference Figures 1 to 13 This invention describes a filtration and purification apparatus for rapeseed oil processing, comprising a filter cylinder 101 and a mounting shell 103. The mounting shell 103 serves as the mounting base for other components, including the filter cylinder 101, which can be directly or indirectly mounted on it, forming a relatively integrated unit. Vertically, the filter cylinder 101 is fixedly connected to the mounting shell 103. The filter cylinder 101 has a material filtration chamber 104 inside, used to hold the material to be filtered and purified. The mounting shell 103 has an oil-containing chamber 105 inside, used to hold the filtered and purified oil. A filter screen 202 for filtering and purifying the oil is provided inside the material filtration chamber 104, installed at the connection between the filter cylinder 101 and the mounting shell 103. The oil-containing chamber 105 and the material filtration chamber 104 are connected through the filter screen 202.

[0045] The rapeseed oil processing filtration and purification device also includes a pressure regulating component for adjusting the pressure of the material filtration chamber 104. The pressure regulating component includes an external air pump mechanism, a pressure gauge 117, and a vent pipe 116. The external air pump mechanism is connected to the material filtration chamber 104 to increase the pressure within the chamber, ensuring it reaches the pressure required for material filtration and purification. A cover plate 102 is coaxially mounted on the top of the filter cylinder 101, and is detachably connected to the filter cylinder 101 to ensure the sealing of the material filtration chamber 104. The pressure gauge 117 is mounted on the cover plate 102 to monitor changes in pressure within the material filtration chamber 104 in real time. The vent pipe 116 is fixedly connected to the filter cylinder 101 and communicates with the material filtration chamber 104 to release the air pressure within the chamber.

[0046] The filter cartridge 101 is equipped with a feed pipe 113 and a discharge pipe 114, both of which are connected to the material filtration chamber 104. The mounting housing 103 is equipped with a drain pipe 115 and a material pump inlet pipe 111, which is connected to the feed pipe 113. A pump 112 is installed on the material pump inlet pipe 111, which pumps material into the feed pipe 113 and the material filtration chamber 104. The drain pipe 115 is connected to the oil-containing chamber 105 and is used to discharge the filtered and purified oil. The discharge pipe 114 is used to discharge oil residue and other impurities trapped on the surface of the filter screen 202.

[0047] Furthermore, a support assembly and a drive mechanism are also provided inside the material filtration chamber 104. The support assembly supports and fixes the filter screen 202, preventing displacement during the filtration and purification process. Specifically, the material enters the material filtration chamber 104 through the material pump inlet pipe 111, or it can be poured in directly after opening the cover plate 102. Subsequently, an external air pump mechanism pressurizes the material filtration chamber 104, and a pressure gauge 117 monitors the pressure value in real time to ensure a stable pressure required for filtration and purification. Under pressure, the oil passes through the filter screen 202 into the oil-containing chamber 105 for purification and is collected through the drain pipe 115; impurities are trapped on the surface of the filter screen 202 and discharged through the discharge pipe 114. During this process, the support assembly provides support for the filter screen 202 in a supported area 204 and a non-supported area 205. Under continuous high pressure, the filter screen 202 in the non-supported area 205 undergoes local expansion and deformation due to lack of support, bearing higher tensile stress. Because of the supporting effect, the filter screen 202 in the support area 204 experiences dispersed stress and less tensile deformation. This uneven distribution of tensile stress causes the filter screen 202 to first exhibit localized tensile deformation or even tearing in the non-supported areas, thus significantly shortening the overall service life of the filter screen 202.

[0048] Furthermore, during the material filtration and purification process, the drive mechanism drives the support assembly to move periodically, dynamically adjusting the support position of the filter screen 202. This process continuously changes the contact area between the filter screen 202 and the support assembly, causing the originally supported areas on the filter screen 202 to gradually detach from the supported state, while adjacent unsupported areas sequentially enter the supported state. Therefore, through the alternating action of the supported area 204 and the unsupported area 205 on the filter screen 202, the locally concentrated stress on the filter screen 202 can be distributed as evenly as possible across the entire filter screen 202, making the stress conditions on each part of the filter screen 202 more consistent. This effectively avoids deformation caused by long-term stress concentration in a fixed area, thereby extending the overall service life of the filter screen 202.

[0049] In one embodiment, the support assembly includes a sealing ring 400. The sealing ring 400 is coaxially disposed inside the filter cylinder 101 to fix and tension the filter screen 202, while preventing unfiltered and unpurified material from entering the oil holding chamber 105. Specifically, multiple connecting rods 401 are fixedly provided on the sealing ring 400, making it easy for operators to install the sealing ring 400 by hand or with the aid of tools.

[0050] In one embodiment, the support assembly further includes a base plate 201 and a swing unit. The base plate 201 is coaxially fixed inside the filter cylinder 101, and has multiple oil filter holes for oil flow. The swing unit includes multiple sets of evenly spaced swing rods 203. The multiple sets of swing rods 203 are circumferentially distributed around the central axis of the filter cylinder 101 on the base plate 201, and the spacing between adjacent swing rods 203 increases radially towards the inner wall of the filter cylinder 101 along the radial direction of the base plate 201, so that the multiple swing rods 203 are radially distributed. The driving mechanism is used to drive the swing rods 203 to rotate axially around the filter cylinder 101.

[0051] It is understandable that the gap area between adjacent swing rods 203 is the non-support area 205, while the top wall of each set of swing rods 203 in contact with the filter screen 202 is the support area 204.

[0052] In one embodiment, the drive mechanism includes a motor 214, a gear 215, and two sets of transmission units 300. The two sets of transmission units 300 are symmetrically arranged along the central axis of the filter cartridge 101. A fixing ring 213 is fixedly disposed in the middle of the base plate 201, and the gear 215 is rotatably connected to the fixing ring 213. A fixing plate 212 is fixedly disposed on the fixing ring 213, and the motor 214 is fixedly connected to the fixing plate 212. The output end of the motor 214 is fixedly connected to the gear 215 and is used to drive the gear 215 to rotate around its own axis. The motor 214 transmits power to the two sets of transmission units 300 through the gear 215, so that the transmission units 300 can drive the swing arm 203 to rotate.

[0053] Furthermore, each transmission unit 300 includes a rotating ring 301, a drive rod 305, and a spring plate 306. The rotating ring 301 is coaxially rotatably connected to the fixed ring 213. Multiple gear teeth are fixedly arranged on the rotating ring 301, and these teeth are evenly distributed circumferentially around the central axis of the rotating ring 301. The gear teeth mesh with the gear 215, enabling the rotating ring 301 to rotate axially around the fixed ring 213. The drive rod 305 is positioned above the swing rod 203, i.e. Figure 12 The spring 306 is fixedly connected to the drive rod 305 and extends towards the base plate 201 in the vertical direction and radially along the filter cylinder 101. It is used to push the rotation of the swing rod 203. In particular, the two sets of rotating rings 301 are arranged opposite each other radially along the filter cylinder 101, detachably connected to each other, and coaxially rotated with the fixed ring 213.

[0054] Specifically, the filter screen 202 is laid on the radially distributed swing rods 203, covering the drive rod 305, with the drive rod 305 positioned between the filter screen 202 and the swing rods 203. Through the support of the drive rod 305, a localized area of ​​the filter screen 202 is lifted, forming an arched structure at a certain angle. Subsequently, the sealing ring 400 is pressed onto the outer periphery of the filter screen 202, working together with the drive rod 305 to keep the filter screen 202 taut.

[0055] During the material filtration and purification process, the motor 214 is started, driving the gear 215 to rotate, which in turn drives the two sets of rotating rings 301 to rotate synchronously around the axial direction of the fixed ring 213, thereby driving the drive rod 305 to rotate synchronously, and consequently the spring piece 306 rotates synchronously with the drive rod 305. When the spring piece 306 rotates with the drive rod 305 to contact a certain swing rod 203, it is blocked and undergoes elastic deformation; as the drive rod 305 continues to rotate, it pushes the swing rod 203 to rotate to a certain extent around the axial direction of the filter cylinder 101, realizing the alternating action of the support area 204 and the non-support area 205 on the filter screen 202.

[0056] Once the spring 306 has completely passed the current swing arm 203, it disengages from the swing arm 203, its elastic deformation recovers, and it no longer applies a pushing force to the swing arm 203, thus achieving intermittent pushing of the swing arm 203. The continuous operation of the motor 214 causes the spring 306 to continue moving, acting on the next swing arm 203 in sequence, repeating the above pushing process to achieve pushing of multiple swing arms 203.

[0057] When all the swing rods 203 are driven in sequence and the relative positions of the two sets of drive rods 305 are interchanged, that is, each set of drive rods 305 rotates 180 degrees, the motor 214 runs in the opposite direction, driving the rotating ring 301 and the drive rods 305 to rotate in the opposite direction, so that the spring 306 pushes the swing rods 203 to rotate and reset to the initial position, thus completing a complete reciprocating motion cycle.

[0058] Therefore, during the periodic reciprocating rotation of the swing rod 203, its support position on the filter screen 202 continuously changes, causing the contact area between the filter screen 202 and the swing rod 203 to change. This results in the originally supported areas on the filter screen 202 gradually losing their support state, while adjacent unsupported areas sequentially enter the support state. Thus, through the alternating action of the supported area 204 and the unsupported area 205 on the filter screen 202, the locally concentrated stress on the filter screen 202 is distributed as evenly as possible across the entire filter screen 202, making the stress conditions on each part of the filter screen 202 more consistent. This effectively avoids the long-term concentration of stress on a fixed area, thereby extending the overall service life of the filter screen 202.

[0059] In one embodiment, the support assembly further includes multiple sets of evenly spaced bottom rods 206. These bottom rods 206 are circumferentially distributed between the base plate 201 and the swing rod 203 around the central axis of the filter cylinder 101, and each set of bottom rods 206 is fixedly connected to the fixing ring 213 and the base plate 201. The spacing between adjacent bottom rods 206 increases radially towards the inner wall of the filter cylinder 101 along the radial direction of the base plate 201, resulting in a radial distribution of the bottom rods 206. Furthermore, each set of bottom rods 206 is fixedly provided with a limiting block 207, which extends axially away from the base plate 201 along the filter cylinder 101. Each set of swing rods 203 has a sliding groove 208, which extends axially around the filter cylinder 101, and each set of limiting blocks 207 is slidably connected to each set of sliding grooves 208.

[0060] Specifically, each set of limiting blocks 207 cooperates with a set of sliding grooves 208 located in the same vertical plane to limit the rotation range of the swing rod 203. The sliding grooves 208 extend axially around the filter cylinder 101 and are arranged in an arc-shaped path around the central axis of the filter cylinder 101. Their geometry and length determine the rotation range of the swing rod 203.

[0061] Furthermore, a limiting ring 221 is coaxially arranged inside the filter cylinder 101. The limiting ring 221 is coaxially arranged on the inner side of the base plate 201 to limit the swing rod 203 from sliding along the axial direction of the filter cylinder 101.

[0062] Specifically, a circular through-hole is provided in the center of the filter screen 202. The size and position of this circular through-hole match the retaining ring 213, providing clearance for the retaining ring 213 and the waterproof cover 211 during installation. Furthermore, a rigid rubber ring is provided between the filter screen 202 and the retaining ring 213. The rigid rubber ring is coaxially positioned on the outside of the retaining ring 213 to reduce wear between the filter screen 202 and the retaining ring 213 while ensuring a seal.

[0063] In one embodiment, the transmission unit 300 further includes an arc-shaped plate 302 and two sets of scrapers 303. The arc-shaped plate 302 extends radially along the filter cylinder 101 and is fixedly connected to the rotating ring 301. Along the axial direction of the filter cylinder 101, the arc-shaped plate 302 is spaced apart from the drive rod 305, with the opening of the arc-shaped plate 302 facing the drive rod 305 and the base plate 201. The two side walls of the arc-shaped plate 302 extend in a direction away from each other and close to the base plate 201. The radial dimension of the arc-shaped plate 302 in the filter cylinder 101 gradually increases in the axial direction of the drive rod 305 away from the fixed ring 213. The two sets of scrapers 303 are slidably connected to the two side walls of the arc-shaped plate 302 and are slidable along the extension direction of the side walls. The scrapers 303 always abut against the surface of the filter screen 202 to scrape off impurities adhering to the filter screen 202. Understandably, the radial dimensional variation of the arc-shaped plate 302 in the filter cylinder 101 is consistent with the increasing trend of the spacing between adjacent swing rods 203, ensuring that the structure of the arc-shaped plate 302 and the spatial layout of the swing rods 203 are coordinated. The filter screen 202 is placed between the arc-shaped plate 302 and the drive rod 305, effectively ensuring that the filter screen 202 can be evenly stressed and maintain tension. At the same time, after the motor 214 is started, the structure of the arc-shaped plate 302 can guide the scraper 303 to always maintain an appropriate position and angle, so that it is closely attached to the surface of the filter screen 202, thereby stably applying contact pressure during the movement.

[0064] Furthermore, each set of scrapers 303 is equipped with a spring 304. One end of the spring 304 is fixedly connected to the scraper 303, and the other end is fixedly connected to the arc-shaped plate 302. The elastic force of the spring 304 always causes the scraper 303 to tend to slide away from the arc-shaped plate 302. The spring 304 can adjust the elastic force on the scraper 303 according to the thickness and hardness of the impurities on the surface of the filter screen 202.

[0065] Specifically, when installing the filter screen 202, the installation position of the arc-shaped plate 302 will surround part of the drive rod 305. The structure of the arc-shaped plate 302 will prevent the entire filter screen 202 from directly passing through the gap between the arc-shaped plate 302 and the drive rod 305, making it difficult to complete the coverage installation in one go. Therefore, the filter screen 202 can be divided into two semi-ring-shaped structures, which are passed through the gap between the arc-shaped plate 302 and the drive rod 305 from both sides, and gradually unfolded after passing around the drive rod 305. After both halves of the filter screen 202 are in place, they are connected at the joint by other fixing structures, and the filter screen 202 is tensioned and fixed as a whole by the sealing ring 400, thereby achieving complete coverage of the entire filtration area by the filter screen 202. It is understood that this embodiment does not limit the specific installation method of the filter screen 202. Any installation method that can ensure the correct position, tension state and functional realization of the filter screen 202 is within the protection scope of this technical solution.

[0066] During the material filtration and purification process, the starter motor 214 drives the gear 215 to rotate, causing the two sets of rotating rings 301 to rotate synchronously around the fixed ring 213, thereby driving the arc plate 302 and the scraper 303 to rotate synchronously. Simultaneously, the scraper 303, under the elastic force of the spring 304, remains in contact with the surface of the filter screen 202 to scrape away impurities accumulated on the filter screen 202. When the impurities accumulated on the surface of the filter screen 202 are thick or hard, the scraper 303 encounters significant resistance during its movement, causing a large sliding displacement between the scraper 303 and the arc plate 302, compressing the spring 304 and causing it to undergo a certain amount of elastic deformation. At this time, due to the increased compression, the spring 304 exerts a greater elastic force on the scraper 303. This elastic force keeps the scraper 303 in close contact with the surface of the filter screen 202, enhancing the scraping pressure and effectively overcoming high-resistance conditions.

[0067] When the impurities on the surface of the filter screen 202 are thin or soft, the scraper 303 experiences less resistance, resulting in a smaller sliding displacement between the scraper 303 and the arc-shaped plate 302. Consequently, the compression of the spring 304 decreases, and the resulting elastic force is also lower. In this state, the scraper 303 can still effectively remove impurities while avoiding excessive contact pressure, effectively preventing wear on the surface of the filter screen 202 due to excessive friction.

[0068] In one embodiment, the drive mechanism further includes a waterproof cover 211, which is coaxially and detachably connected to two sets of rotating rings 301. The waterproof cover 211 covers the motor 214 to prevent materials from entering the motor 214 and causing movement stagnation.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A filtering and purifying device for processing of rapeseed oil, characterized in that, include: A filter cylinder, wherein a material filtration chamber is formed inside the filter cylinder, and a filter screen is provided inside the material filtration chamber, the filter screen being used to filter and purify oil. A pressure regulating component, used to adjust the pressure in the material filtration chamber; A support assembly is disposed inside the material filtration chamber to support and fix the filter screen. The support assembly includes a base plate and a swing unit. The base plate is coaxially fixed inside the filter cylinder and has multiple oil filter holes for oil flow. The swing unit includes multiple sets of evenly spaced swing rods circumferentially distributed around the central axis of the filter cylinder on the base plate. The swing rods are rotatable around the axial direction of the filter cylinder. The spacing between adjacent swing rods increases radially from the base plate towards the inner wall of the filter cylinder. The drive mechanism includes a motor, gears, and two sets of transmission units, which are symmetrically arranged along the central axis of the filter cylinder. Each transmission unit includes a rotating ring, a drive rod, and a spring plate. The rotating ring meshes with the gears. The drive rod is disposed between the filter screen and the swing rod, and is fixedly connected to the rotating ring. The spring plate is fixedly connected to the drive rod. During the filtration process, the motor drives the rotating ring to rotate through the gear, and the spring can intermittently push the swing rod to rotate around the axial direction of the filter cylinder to periodically change the support position of the filter screen.

2. The filtering and purifying device for processing of rapeseed oil according to claim 1, characterized in that, The support assembly includes a sealing ring, which is coaxially disposed inside the filter cylinder and is used to fix and tension the filter screen.

3. The filtering and purifying device for rapeseed oil processing according to claim 1, characterized in that, The support assembly further includes multiple sets of evenly spaced base rods, which are circumferentially distributed between the base plate and the swing rod around the central axis of the filter cylinder; the multiple sets of base rods are fixedly connected to the base plate; the spacing between adjacent base rods increases radially towards the inner wall of the filter cylinder along the base plate; a limiting block is fixedly provided on each set of base rods, and the limiting block extends axially away from the base plate along the filter cylinder; a sliding groove is provided on each set of swing rods, and the sliding groove extends axially around the filter cylinder; each set of limiting blocks and each set of sliding grooves are slidably engaged to limit the rotation range of the swing rod.

4. The filtering and purifying device for rapeseed oil processing according to claim 1, characterized in that, It also includes a limiting ring, which is used to limit the displacement of the swing rod along the axial direction of the filter cylinder.

5. The filtering and purifying device for rapeseed oil processing according to claim 1, characterized in that, The transmission unit further includes an arc-shaped plate and two sets of scrapers; the arc-shaped plate extends radially along the filter cylinder and is fixedly connected to the rotating ring; along the axial direction of the filter cylinder, the arc-shaped plate and the drive rod are spaced apart, and the opening of the arc-shaped plate faces the drive rod and the bottom plate; the two side walls of the arc-shaped plate extend in a direction away from each other and close to the bottom plate; the radial dimension of the arc-shaped plate in the filter cylinder gradually increases along the axial direction of the drive rod towards the inner wall of the filter cylinder; the two sets of scrapers are slidably connected to the two side walls of the arc-shaped plate and can slide along the extension direction of the side walls; the scrapers always abut against the surface of the filter screen to scrape off impurities attached to the filter screen.

6. The filtration and purification apparatus for rapeseed oil processing according to claim 5, characterized in that, Each of the scrapers is equipped with a spring; one end of the spring is fixedly connected to the scraper, and the other end is fixedly connected to the arc-shaped plate. The spring force always makes the scraper tend to slide away from the arc-shaped plate. The spring can adjust the elastic force on the scraper according to the thickness and hardness of the impurities on the surface of the filter screen.

7. The filtration and purification apparatus for rapeseed oil processing according to claim 1, characterized in that, The drive mechanism also includes a waterproof cover to prevent materials from entering the motor.

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