Astaxanthin extraction device

Abstract

The invention relates to the field of extraction devices, in particular to an astaxanthin extraction device.A center shaft which is driven by a power device and rotates around the axis of the center shaft is arranged in an extraction tank, a sleeve is vertically installed on the center shaft in a sliding mode, a fixed sleeve is fixedly installed on the sleeve, and a sliding sleeve is further vertically installed on the sleeve located above the fixed sleeve in a sliding mode; stirring blades are fixedly mounted on the fixed sleeve and the sliding sleeve; a movable column is further slidably mounted on the fixed sleeve in the radial direction of the extraction tank, a scraping plate matched with the inner wall of the extraction tank is fixedly mounted at one end of the movable column, and a supporting rod is hinged between the sliding sleeve and the movable column; when the fixed sleeve and the sliding sleeve rotate to stir the materials, the cantilever drives the sleeve, the fixed sleeve and the sliding sleeve to reciprocate up and down along the central shaft through the hollow pipe, so that the stirring blades are driven to uniformly stir the materials at different depths in the extraction tank.

Description

Technical Field

[0001] The present invention relates to the field of extraction devices, and more particularly to an astaxanthin extraction device. Background Art

[0002] Haematococcus pluvialis has a high astaxanthin content and is the best biological source of astaxanthin. When extracting astaxanthin from Haematococcus pluvialis, the Haematococcus pluvialis is usually mechanically broken first and then extracted with a solvent.

[0003] In the prior art, the invention patent with the application number CN202110199660.7 discloses a comprehensive astaxanthin wall-breaking extraction device for Haematococcus pluvialis, including a bottom plate, a bead mill for physical wall-breaking, a reaction part for solid-liquid mixing reaction, a conveyor belt for transporting centrifuge tubes, a centrifuge, and an assembly part for adding an upper cover to the centrifuge tube and moving the centrifuge tube into the centrifuge; the whole device is integrated and flexible, comprehensively performing wall-breaking and extraction operations on Haematococcus pluvialis, greatly improving the wall-breaking extraction efficiency of astaxanthin and the convenience of operation.

[0004] The reaction part of the above extraction device includes a reaction barrel, a rotating shaft is installed at the center of the barrel cover, a turntable is provided at the lower end of the rotating shaft, and several stirring rods are provided at the bottom of the turntable. The turntable and the stirring rods are driven by a stirring motor to rotate for stirring, accelerating the reaction rate.

[0005] However, the stirring method of the above extraction device is single and cannot efficiently mix the broken Haematococcus pluvialis with the extraction solvent evenly; moreover, the above extraction device does not have a structure for cleaning the inner wall of the reaction barrel, and some materials will adhere to the inner wall of the reaction barrel and are not easy to discharge after the extraction is completed, resulting in waste of raw materials. Summary of the Invention

[0006] The purpose of the present invention is to provide an astaxanthin extraction device that can efficiently stir the materials and scrape the materials adhering to the inner wall of the extraction tank, so as to solve the defects mentioned in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] An astaxanthin extraction device, comprising a cylindrical extraction tank. Inside the extraction tank, there is a central shaft driven by a power device to rotate around its own axis. The central shaft is coaxially arranged with the extraction tank. A sleeve located inside the extraction tank is vertically slidably mounted on the central shaft. A fixed sleeve is fixedly mounted on the sleeve. Above the fixed sleeve, a sliding sleeve is also vertically slidably mounted on the sleeve. Stirring blades are fixedly mounted on both the fixed sleeve and the sliding sleeve. An active column is radially slidably mounted on the fixed sleeve along the radial direction of the extraction tank. One end of the active column is fixedly mounted with a scraper matching the inner wall of the extraction tank. A support rod is hinged between the sliding sleeve and the active column. The upper end of the sleeve is rotatably mounted on a first mounting plate, and the upper end of the sliding sleeve is rotatably mounted on a second mounting plate. The first mounting plate is driven by a lifting mechanism to move vertically, and the second mounting plate is driven by a telescopic member to move up and down relative to the first mounting plate.

[0009] As a further improvement, a hollow tube extending vertically is fixedly mounted on the first mounting plate. A guiding hole for the hollow tube to pass through is provided on the top wall of the extraction tank. A light shaft extending vertically is fixedly mounted on the second mounting plate. The light shaft is vertically slidably mounted inside the hollow tube.

[0010] As a further improvement, the lifting mechanism includes a vertical frame on one side of the extraction tank. A sliding seat driven by a screw mechanism to move vertically is provided on the vertical frame. A cantilever is fixedly mounted on the sliding seat. The upper end of the hollow tube is fixedly mounted on the cantilever.

[0011] As a further improvement, the upper end of the light shaft passes out of the outside of the hollow tube and is fixedly mounted with a mounting seat. The telescopic member is an electric push rod fixedly mounted on the mounting seat. The output end of the electric push rod extends downward and is fixedly mounted on the cantilever.

[0012] As a further improvement, the scraper is in a spiral shape that fits the inner wall of the extraction tank.

[0013] As a further improvement, a feeding port is provided at the top of the extraction tank. A cylindrical discharge pipe extending downward is provided at the bottom of the extraction tank. A sealing plate is detachably mounted at the lower end of the discharge pipe. A filter screen driven by a motor to rotate around a diameter of the discharge pipe is provided inside the discharge pipe. The filter screen is circular and the area of the filter screen is the same as the cross-sectional area of the inner cavity of the discharge pipe. A discharge port is provided on the discharge pipe below the filter screen, and a valve is mounted on the discharge port.

[0014] As a further improvement, the bottom wall of the inner cavity of the extraction tank is provided with a conical surface that is high in the middle and low at the edges. The upper end of the discharge pipe communicates with one side edge of the conical surface.

[0015] As a further improvement, a scraper rod matching the conical surface is fixedly mounted on the fixed sleeve.

[0016] As a further improvement, a vertically extending liquid extraction tube is provided on one side of the extraction tank, and the upper and lower ends of the liquid extraction tube are closed. A liquid inlet pipe is connected between one side of the lower end of the liquid extraction tube and the extraction tank, and a liquid outlet pipe is connected between one side of the upper end of the liquid extraction tube and the extraction tank. A piston is vertically movably installed in the liquid extraction tube, and a one-way valve assembly that conducts from bottom to top is installed on the piston. A pull-out rod that extends upward is fixedly installed on the piston. A through hole for the pull-out rod to pass through is provided on the top of the liquid extraction tube, and the upper end of the pull-out rod is fixedly installed on the cantilever.

[0017] As a further improvement, the end of the liquid inlet pipe connected to the extraction tank is tilted downward; the end of the liquid outlet pipe connected to the extraction tank is tilted downward.

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

[0019] 1. While the fixed sleeve and the sliding sleeve rotate to stir the materials, the cantilever drives the sleeve, the fixed sleeve and the sliding sleeve to move up and down along the central axis through the hollow tube, thereby driving the stirring blades to evenly stir the materials at different depths in the extraction tank, so that the stirring effect is better, and the broken Haematococcus pluvialis and the extraction solvent are mixed more fully;

[0020] 2. When the material is stirred by the stirring blade, the electric push rod drives the sliding sleeve to move upward along the sleeve, and the sliding sleeve drives the scraper to separate from the inner wall of the extraction tank through the support rod, so as to avoid the scraper from continuously rubbing against the inner wall of the extraction tank and causing excessive wear of the scraper or the extraction tank; after the material in the extraction tank is discharged, the electric push rod drives the sliding sleeve to move downward along the sleeve, and the sliding sleeve drives the scraper to fit on the inner wall of the extraction tank through the support rod. The spiral scraper scrapes off the material attached to the inner wall of the extraction tank and pushes the material to the bottom of the extraction tank, so that the material in the extraction tank is discharged more cleanly and waste is avoided;

[0021] 3. When the extract in the extraction tank is discharged through the discharge port, the extract is filtered through the horizontal filter screen, and the fixed material stays on the top of the filter screen, which makes it more convenient for subsequent treatment of the extract. It is also convenient for multiple extraction operations of the Haematococcus pluvialis raw materials, thereby improving economic benefits;

[0022] 4. When the cantilever moves up and down reciprocally, it drives the piston to move up and down reciprocally through the extraction rod. Driven by the piston, the material deep in the extraction tank enters the liquid extraction pipe below the piston through the liquid inlet pipe. At the same time, the material in the liquid extraction pipe above the piston flows back to the upper liquid level of the extraction tank through the liquid outlet pipe, thereby promoting the up-and-down flow of the material in the extraction tank and further improving the uniformity of the distribution of Haematococcus pluvialis in the extraction solvent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of Embodiment 1 of the present invention;

[0025] Figure 2 is Figure 1 a cross-sectional view of the extraction tank in

[0026] Figure 3 is a schematic structural diagram of the sleeve of Embodiment 1 of the present invention;

[0027] Figure 4 is an exploded view of the sleeve of Embodiment 1 of the present invention;

[0028] Figure 5 is a schematic structural diagram of the discharge pipe of Embodiment 1 of the present invention;

[0029] Figure 6 is a schematic structural diagram of Embodiment 2 of the present invention;

[0030] Figure 7 is a schematic structural diagram of the liquid extraction pipe of Embodiment 2 of the present invention;

[0031] Figure 8 is a schematic structural diagram of the piston of Embodiment 2 of the present invention;

[0032] Figure 9 is a schematic structural diagram of the leather cup of Embodiment 2 of the present invention.

[0033] In the figure: 1 - bottom plate; 2 - extraction tank; 3 - central shaft; 4 - stirring motor; 5 - sleeve; 6 - first chute; 7 - first slider; 8 - fixed sleeve; 9 - sliding sleeve; 10 - second chute; 11 - second slider; 12 - outer tube; 13 - movable column; 14 - scraper; 15 - support rod; 16 - first mounting plate; 17 - second mounting plate; 18 - hollow tube; 19 - optical axis; 20 - vertical frame; 21 - sliding seat; 22 - sliding groove; 23 - lifting motor; 24 - lead screw; 25 - cantilever; 26 - mounting seat; 27 - electric push rod; 28 - feeding port; 29 - discharge pipe; 30 - sealing plate; 31 - motor; 32 - filter screen; 33 - rotating shaft; 34 - discharge port; 35 - conical surface; 36 - scraping rod; 37 - liquid extraction pipe; 38 - plugging cover; 39 - liquid inlet pipe; 40 - liquid outlet pipe; 41 - piston; 42 - pull rod; 43 - positioning hole; 44 - liquid through hole; 45 - positioning column; 46 - leather cup; 47 - stop head; 48 - stirring blade. Detailed implementation manner

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1:

[0036] As Figures 1 to 5 shown, an astaxanthin extraction device includes a bottom plate 1. Above the bottom plate 1, there is a cylindrical extraction tank 2. The extraction tank 2 is fixedly connected to the bottom plate 1 through support legs. Inside the extraction tank 2, there is a central shaft 3 driven by a power device and rotating around its own axis. The central shaft 3 is coaxially arranged with the extraction tank 2. The upper and lower ends of the central shaft 3 are respectively rotationally connected to the top wall and the bottom wall of the extraction tank 2 through bearings. The power device is a stirring motor 4 installed on the bottom plate 1 by bolts. The lower end of the central shaft 3 extends to the outside of the extraction tank 2 and is fixedly connected to the rotating shaft of the stirring motor 4 through a coupling.

[0037] As Figure 2As shown, a sleeve 5 located inside the extraction tank 2 is vertically slidably mounted on the central shaft 3. On the outer wall of the central shaft 3 located inside the extraction tank 2, a vertically extending first chute 6 is provided. On the inner wall of the sleeve 5, a first slider 7 that is integrally formed and matches the first chute 6 is provided, which can prevent the sleeve 5 from rotating relative to the central shaft 3. On the outer side of the lower end of the sleeve 5, a fixed sleeve 8 is fixedly mounted by bolts. On the sleeve 5 above the fixed sleeve 8, a sliding sleeve 9 is also vertically slidably mounted. On the outer wall of the sleeve 5, a vertically extending second chute 10 is provided. On the inner wall of the sliding sleeve 9, a second slider 11 that is integrally formed and matches the second chute 10 is provided, which can prevent the sliding sleeve 9 from rotating relative to the sleeve 5. On the outer peripheral surface of the fixed sleeve 8 and on the outer peripheral surface of the sliding sleeve 9, a plurality of stirring blades 48 that are circumferentially and evenly spaced are welded. By driving the central shaft 3 to rotate through the stirring motor 4, the central shaft 3 drives the fixed sleeve 8 and the sliding sleeve 9 to rotate through the sleeve 5. The materials inside the extraction tank 2 are stirred by the stirring blades 48 on the fixed sleeve 8 and the sliding sleeve 9, so that the broken Haematococcus pluvialis and the extraction solvent are efficiently mixed evenly.

[0038] As Figure 3 shown, on the opposite sides of the fixed sleeve 8, outer tubes 12 extending radially along the extraction tank 2 are respectively welded. Inside the two outer tubes 12, movable columns 13 are respectively slidably inserted. At one end of the movable column 13 away from the central shaft 3, a scraper 14 that matches the inner wall of the extraction tank 2 is welded. In order to improve the scraping efficiency of the materials on the inner wall of the extraction tank 2, the scraper 14 is in a spiral shape that fits the inner wall of the extraction tank 2. On the opposite sides of the lower end of the sliding sleeve 9, first hinge seats are respectively provided. On the tops of the two movable columns 13, second hinge seats are respectively provided. A support rod 15 is hinged between the corresponding first hinge seat and the second hinge seat. Slide the sliding sleeve 9 upward along the sleeve 5. The sliding sleeve 9 drives the movable column 13 to approach the central shaft 3 through the support rod 15, so that the scraper 14 is separated from the inner wall of the extraction tank 2. Slide the sliding sleeve 9 downward along the sleeve 5. The sliding sleeve 9 drives the movable column 13 to move away from the central shaft 3 through the support rod 15, so that the scraper 14 fits on the inner wall of the extraction tank 2.

[0039] The upper end of the sleeve 5 is rotatably mounted on the first mounting plate 16 through a bearing. The upper end of the sliding sleeve 9 is rotatably mounted on the second mounting plate 17 through a bearing. The second mounting plate 17 is located below the first mounting plate 16. The first mounting plate 16 is driven by a lifting mechanism to move vertically. The second mounting plate 17 is driven by a telescopic member to move up and down relative to the first mounting plate 16.

[0040] In this embodiment, a vertically extending hollow tube 18 is fixedly installed on the first mounting plate 16 by bolts. There are two hollow tubes 18 symmetrically arranged with respect to the central axis 3. A guiding hole for the hollow tube 18 to pass through is provided on the top wall of the extraction tank 2. A sealing member, which can be a sealing rubber ring, is provided between the inner wall of the guiding hole and the hollow tube 18 to prevent the material in the extraction tank 2 from overflowing between the guiding hole and the hollow tube 18. A vertically extending optical axis 19 is fixedly installed on the second mounting plate 17 by bolts. There are also two optical axes 19 symmetrically arranged with respect to the central axis 3. The optical axis 19 is vertically slidably installed in the corresponding hollow tube 18.

[0041] As Figure 1 shown, the lifting mechanism includes a vertical frame 20 located on one side of the extraction tank 2, and a sliding seat 21 driven to move vertically by a screw mechanism is provided on the vertical frame 20. Specifically, a vertically extending sliding groove 22 is provided inside the vertical frame 20, and the sliding seat 21 is slidably installed in the sliding groove 22. The screw mechanism includes a lifting motor 23 installed at the top of the vertical frame 20 by bolts. The rotating shaft of the lifting motor 23 extends downward into the sliding groove 22 and is fixedly installed with a vertically extending screw rod 24 through a coupling. The lower end of the screw rod 24 is rotatably connected to the bottom wall of the sliding groove 22 through a bearing. The sliding seat 21 is screwed onto the screw rod 24, and the rotation of the screw rod 24 can drive the sliding seat 21 to move up and down. A horizontally extending cantilever 25 is fixedly installed on one side of the sliding seat 21 by bolts. The upper end of the hollow tube 18 is fixedly installed on the cantilever 25 by bolts.

[0042] While the fixed sleeve 8 and the sliding sleeve 9 rotate to stir the material, the lifting motor 23 drives the screw rod 24 to rotate periodically in a forward and reverse alternating manner. Furthermore, the screw rod 24 drives the sliding seat 21 and the cantilever 25 to move up and down reciprocally. The cantilever 25 drives the sleeve 5, the fixed sleeve 8, and the sliding sleeve 9 to move up and down reciprocally along the central axis 3 through the hollow tube 18, so as to drive the stirring blades 48 to uniformly stir the materials at different depths in the extraction tank 2. The stirring effect is better, and the mixture of the broken Haematococcus pluvialis and the extraction solvent is more sufficient.

[0043] As Figure 2As shown, the upper end of the optical axis 19 passes through the outside of the hollow tube 18. A mounting seat 26 is fixedly installed at the upper ends of the two optical axes 19 by bolts. The telescopic member is an electric push rod 27 fixedly installed at the top of the mounting seat 26 by bolts. The output end of the electric push rod 27 extends downward and is fixedly installed on the cantilever 25 by bolts. When the material in the extraction tank 2 is stirred by the stirring blade 48, the electric push rod 27 extends, and the electric push rod 27 drives the second mounting plate 17 to move upward close to the first mounting plate 16 through the optical axis 19. Further, the second mounting plate 17 drives the sliding sleeve 9 to move upward along the sleeve 5. The sliding sleeve 9 drives the movable column 13 to approach the central axis 3 through the support rod 15, so that the scraping plate 14 is separated from the inner wall of the extraction tank 2, avoiding continuous friction between the scraping plate 14 and the inner wall of the extraction tank 2 during the stirring of the material, which may cause excessive wear of the scraping plate 14 or the extraction tank 2. After the material in the extraction tank 2 is discharged, the electric push rod 27 contracts, and the electric push rod 27 drives the second mounting plate 17 to move downward away from the first mounting plate 16 through the optical axis 19. Further, the second mounting plate 17 drives the sliding sleeve 9 to move downward along the sleeve 5. The sliding sleeve 9 drives the movable column 13 to move away from the central axis 3 through the support rod 15, so that the scraping plate 14 fits on the inner wall of the extraction tank 2. The central axis 3 drives the sleeve 5, the fixed sleeve 8 and the scraping plate 14 to rotate, and the cantilever 25 drives the sleeve 5, the fixed sleeve 8 and the scraping plate 14 to move downward along the central axis. Further, the spiral scraping plate 14 scrapes the material attached to the inner wall of the extraction tank 2 and pushes the material to the bottom of the extraction tank 2, so that the material in the extraction tank 2 is discharged more cleanly, avoiding waste.

[0044] A feeding port 28 is provided at the top of the extraction tank 2 for adding the broken Haematococcus pluvialis and the extraction solvent into the extraction tank 2. As Figure 2 and Figure 5 shown, a cylindrical discharge pipe 29 extending downward is provided at the bottom of the extraction tank 2. A sealing plate 30 is detachably installed at the lower end of the discharge pipe 29 by bolts. A filter screen 32 driven by a motor 31 and rotating around a diameter of the discharge pipe 29 is provided in the discharge pipe 29. The filter screen 32 is circular and the area of the filter screen 32 is the same as the cross-sectional area of the inner cavity of the discharge pipe 29. Opposite ends of the filter screen 32 are respectively fixedly installed with rotating shafts 33 by bolts. The two rotating shafts 33 extend along the same diameter of the filter screen 32. The two rotating shafts 33 are respectively rotatably installed on the side wall of the discharge pipe 29, and the two rotating shafts 33 coincide with a diameter of the discharge pipe 29. The motor 31 is installed at the bottom of the extraction tank 2 by bolts. One of the rotating shafts 33 extends outside the discharge pipe 29 and is connected to the rotating shaft of the motor 31 through a coupling. A discharge port 34 is provided on one side of the discharge pipe 29 below the filter screen 32, and a valve is installed on the discharge port 34.

[0045] In the initial state, the filter screen 32 is in a horizontal state; when the extraction of Haematococcus pluvialis added to the extraction tank 2 is completed once, the valve on the discharge port 34 is opened, and the extraction liquid in the extraction tank 2 is filtered through the filter screen 32 and discharged from the discharge port 34, while the fixed materials in the extraction tank 2 stay on the top of the filter screen 32, thus facilitating the subsequent treatment of the extraction liquid; when the extraction liquid in the extraction tank 2 is completely discharged, the valve on the discharge port 34 is closed, and extraction solvent is added to the extraction tank 2 again to perform multiple extraction operations on the Haematococcus pluvialis raw material and improve economic benefits; or when the extraction liquid in the extraction tank 2 is completely discharged, the sealing plate 30 at the lower end of the discharge pipe 29 is removed, and the filter screen 32 is driven by the motor 31 to rotate to a vertical state so as to discharge the residues on the filter screen 32 from the lower end of the discharge pipe 29.

[0046] To avoid liquid accumulation in the extraction tank 2, the bottom wall of the inner cavity of the extraction tank 2 is provided with a conical surface 35 that is higher in the middle and lower at the edges, and the upper end of the discharge pipe 29 communicates with one side edge of the conical surface 35.

[0047] In this embodiment, scraping rods 36 that match the conical surface 35 are respectively welded to the relatively two sides at the lower end of the fixed sleeve 8. When the lifting mechanism drives the sleeve 5 to move to the lower limit position, the scraping rods 36 come into contact with the conical surface 35 at the bottom of the inner cavity of the extraction tank 2 to scrape off the materials attached to the bottom of the extraction tank 2.

[0048] Embodiment Two:

[0049] As Figures 6 to 9 shown, the difference between this embodiment and Embodiment One is that a liquid extraction pipe 37 extending vertically is provided on one side of the extraction tank 2. Sealing covers 38 are respectively fixedly installed at the upper and lower ends of the liquid extraction pipe 37 through bolts. A liquid inlet pipe 39 is welded between one side of the lower end of the liquid extraction pipe 37 and the side wall of the extraction tank 2, and a liquid outlet pipe 40 is welded between one side of the upper end of the liquid extraction pipe 37 and the side wall of the extraction tank 2. A piston 41 is vertically movably installed in the liquid extraction pipe 37. A one-way valve assembly that conducts from bottom to top is installed on the piston 41. A pull rod 42 extending upward is fixedly installed at the top of the piston 41 through bolts. The pull rod 42 is coaxially arranged with the liquid extraction pipe 37. A through hole for the pull rod 42 to pass through is provided on the sealing cover 38 at the upper end of the liquid extraction pipe 37. A sealing member is provided between the inner wall of the through hole and the pull rod 42. The sealing member can be a sealing rubber ring to prevent the materials in the liquid extraction pipe 37 from overflowing between the through hole and the pull rod 42; the upper end of the pull rod 42 is fixedly installed on the cantilever 25 through bolts.

[0050] As Figure 8 and Figure 9As shown, a plurality of one-way valve assemblies are evenly spaced around the pull rod 42. The one-way valve assembly includes a positioning hole 43 vertically penetrating the piston 41, a liquid-through hole 44 vertically penetrating the piston 41 around the positioning hole 43, a positioning column 45 installed in the positioning hole 43, a leather cup 46 for blocking the liquid-through hole 44 around the positioning hole 43 is formed integrally at the upper end of the positioning column 45, and an inverted conical stopper 47 for preventing the leather cup 46 from falling off is formed integrally at the lower end of the positioning column 45.

[0051] When the cantilever 25 reciprocates up and down, the piston 41 is driven to reciprocate up and down by the pull rod 42. When the piston 41 moves down, the hydraulic pressure below the piston 41 increases, so that the edge of the leather cup 46 is tilted upward, the liquid hole 44 is opened, and then the material in the liquid extraction pipe 37 below the piston 41 flows upward through the liquid hole 44; when the piston 41 moves up, the hydraulic pressure above the piston 41 increases, so that the edge of the leather cup 46 is pressed downward against the upper end of the liquid hole 44, and the liquid hole 44 is closed. Driven by the piston 41, the material located deep in the extraction tank 2 enters the liquid extraction pipe 37 below the piston 41 through the liquid inlet pipe 39, and at the same time, the material in the liquid extraction pipe 37 above the piston 41 flows back to the upper liquid surface of the extraction tank 2 through the liquid outlet pipe 40, thereby promoting the up and down flow of the material in the extraction tank 2, and further improving the uniformity of the distribution of Haematococcus pluvialis in the extraction solvent.

[0052] In order to prevent the accumulation of materials in the liquid extraction pipe 37, the end of the liquid inlet pipe 39 connected to the extraction tank 2 is tilted downward; and the end of the liquid outlet pipe 40 connected to the extraction tank 2 is tilted downward.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An astaxanthin extraction device, characterized in that: It comprises a cylindrical extraction tank, wherein a central shaft driven by a power device and rotating around its own axis is provided in the extraction tank, the central shaft is coaxially arranged with the extraction tank, a sleeve located in the extraction tank is vertically slidably mounted on the central shaft, a fixed sleeve is fixedly mounted on the sleeve, a sliding sleeve is also vertically slidably mounted on the sleeve located above the fixed sleeve, and stirring blades are fixedly mounted on both the fixed sleeve and the sliding sleeve; a movable column is also radially slidably mounted on the fixed sleeve along the extraction tank, a scraper matching the inner wall of the extraction tank is fixedly mounted on one end of the movable column, and a support rod is hinged between the sliding sleeve and the movable column; the upper end of the sleeve is rotatably mounted on a first mounting plate, the upper end of the sliding sleeve is rotatably mounted on a second mounting plate, the first mounting plate is driven to move vertically by a lifting mechanism, and the second mounting plate is driven to move up and down relative to the first mounting plate by a telescopic component.

2. An astaxanthin extraction device as claimed in claim 1, characterized in that: A vertically extending hollow tube is fixedly mounted on the first mounting plate, and a guide hole for the hollow tube to pass through is provided on the top wall of the extraction tank; a vertically extending optical axis is fixedly mounted on the second mounting plate, and the optical axis is vertically slidably mounted in the hollow tube.

3. An astaxanthin extraction device as claimed in claim 2, characterized in that: The lifting mechanism comprises a stand located at one side of the extraction tank, the stand is provided with a slide driven by a screw mechanism to move vertically, a cantilever is fixedly mounted on the slide, and the upper end of the hollow tube is fixedly mounted on the cantilever.

4. An astaxanthin extraction device as claimed in claim 3, characterized in that: The upper end of the optical axis passes through the outer side of the hollow tube and is fixedly mounted with a mounting seat. The telescopic component is an electric push rod fixedly mounted on the mounting seat. The output end of the electric push rod extends downward and is fixedly mounted on the cantilever.

5. An astaxanthin extraction device as claimed in claim 1, characterized in that: The scraper is in a spiral shape that matches the inner wall of the extraction tank.

6. An astaxanthin extraction device as claimed in claim 1, characterized in that: The top of the extraction tank is provided with a feeding port; the bottom of the extraction tank is provided with a cylindrical discharge pipe extending downward, the lower end of the discharge pipe is detachably provided with a sealing plate, and the discharge pipe is provided with a filter screen driven by a motor and rotating around a diameter of the discharge pipe, the filter screen is circular and the area of ​​the filter screen is consistent with the cross-sectional area of ​​the inner cavity of the discharge pipe; The discharge pipe below the filter screen is provided with a discharge port, and a valve is installed on the discharge port.

7. An astaxanthin extraction device as claimed in claim 6, characterized in that: The bottom wall of the inner cavity of the extraction tank is provided with a conical surface which is high in the middle and low at the edge, and the upper end of the discharge pipe is connected to one side edge of the conical surface.

8. An astaxanthin extraction device as claimed in claim 6, characterized in that: A scraper rod matching the conical surface is also fixedly mounted on the fixed sleeve.

9. An astaxanthin extraction device as claimed in claim 1, characterized in that: A vertically extending liquid extraction tube is provided on one side of the extraction tank, and the upper and lower ends of the liquid extraction tube are sealed. A liquid inlet pipe is connected between one side of the lower end of the liquid extraction tube and the extraction tank, and a liquid outlet pipe is connected between one side of the upper end of the liquid extraction tube and the extraction tank. A piston is vertically movably installed in the liquid extraction tube, and a one-way valve assembly conducting from bottom to top is installed on the piston. A pulling rod extending upward is fixedly installed on the piston. A through hole for the pulling rod to pass through is provided on the top of the liquid extraction tube, and the upper end of the pulling rod is fixedly installed on the cantilever.

10. An astaxanthin extraction device as claimed in claim 9, characterized in that: The end of the liquid inlet pipe connected to the extraction tank is tilted downward; the end of the liquid outlet pipe connected to the extraction tank is tilted downward.

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