Device for extracting natural pigment from vegetables

Abstract

The invention discloses a device for extracting natural pigments in vegetables, which comprises an extraction tank and a pretreatment tank, the pretreatment tank is welded to the top of the extraction tank, and a conveying cylinder is obliquely mounted at the bottom of the pretreatment tank. The ultrasonic extraction device has the beneficial effects that the ultrasonic generator mounted on the inner wall surface of the extraction tank is started, so that the ultrasonic generator is promoted to convert electric energy into high-frequency mechanical oscillation through the transducers; the bottom of each transducer is in interference connection with an auxiliary vibration rod with an extension column, and the auxiliary vibration rods are immersed in an extraction solvent of the extraction tank, so that under the cavitation action and the mechanical action of the transducers and the auxiliary vibration rods on the extraction solvent, on one hand, cell walls of crushed vegetables are ultrasonically crushed, and on the other hand, cell walls of crushed vegetables are ultrasonically crushed; and on the other hand, the molecular movement of the extraction solvent can be accelerated, so that the extraction solvent is in rapid contact with the natural pigments in the vegetables.

Description

Technical Field

[0001] The invention relates to the field of natural pigment extraction, in particular to a device for extracting natural pigment from vegetables. Background Art

[0002] The color of food is an important sensory indicator of food. Artificially synthesized pigments are widely used in the food industry to increase color. However, studies have shown that general synthetic pigments have varying degrees of toxicity, and some are even carcinogenic. Therefore, the development of natural and harmless edible pigments is of great significance to ensure human health. Vegetables are of various types and colors, and are a huge resource library of pigments. Natural edible pigments extracted from vegetables are not only highly safe, but also have certain nutritional value and health-care effects. In addition, natural pigments are expensive and have broad market prospects. They can promote the value-added of vegetables and are a development direction for deep processing of vegetables.

[0003] In the prior art, for the extraction of natural pigments in vegetables, organic solvent extraction and carbon dioxide supercritical extraction are often used to obtain natural pigments in vegetables. However, the above two natural pigment extraction methods often require heating or drugs for auxiliary extraction. On the one hand, the heating method with poor control of the conventional temperature range will cause different degrees of loss of natural pigments in vegetables. On the other hand, the drug extraction method makes it easy for the extracted natural pigments to have drug residues, which greatly reduces the effect of the final natural pigment extraction.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a device for extracting natural pigments from vegetables, which has the advantages of easy pretreatment of vegetable raw materials and ultrasonic deep extraction, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above advantages of easy pretreatment of vegetable raw materials and ultrasonic deep extraction, the specific technical scheme adopted by the present invention is as follows:

[0009] A device for extracting natural pigments from vegetables comprises an leaching tank and a pretreatment tank, wherein the top of the leaching tank is welded with the pretreatment tank, and the bottom of the pretreatment tank is obliquely installed with a conveying cylinder, a second motor is fixed to the top of the conveying cylinder, and the output end of the second motor penetrates the conveying cylinder and is fixedly connected with a screw, the bottom end of the conveying cylinder is connected with the leaching tank, a material guide horn is welded on the inner wall of the leaching tank, and the material guide horn is directly below the connection between the conveying cylinder and the leaching tank, a protective shell welded to the inner wall of the leaching tank is arranged below the material guide horn, and a plurality of transducers are arranged around the inside of the protective shell, an ultrasonic generator is fixed on the outer wall of the leaching tank, and the output end of the ultrasonic generator is electrically connected to the plurality of transducers in the protective shell, a mounting sleeve is arranged at the bottom of each of the transducers, and an auxiliary vibration rod is interference-connected in the mounting sleeve, a plurality of extension columns are welded on the surface of the auxiliary vibration rod at equal intervals, and the auxiliary vibration rod is immersed in the extraction solvent perfused in the leaching tank, and a liquid outlet pipe is connected to the right side of the lower part of the leaching tank.

[0010] Furthermore, a first motor is fixed to the top of the pretreatment tank, and the output end of the first motor is fixedly connected to a shaft rod through a coupling, a plurality of crushing knife groups are installed at equal intervals on the lower surface of the shaft rod, and a filter plate is connected to the bottom of the shaft rod through a bearing, and the side of the filter plate is connected to the inner wall of the pretreatment tank, an inclined baffle is welded on the right side of the inside of the pretreatment tank corresponding to the feed port, and a slurry pump is fixedly installed on the bottom surface of the inclined baffle, a circulation pipe is connected to the slurry pump, and the top end of the circulation pipe extends to above the plurality of crushing knife groups, and the bottom end of the circulation pipe extends to above the filter plate.

[0011] Furthermore, an electric push rod is fixed to the upper surface of the leaching tank, and one end of the electric push rod passes through the leaching tank and is fixed with a support block, a sealing plate is welded on the support block, and the sealing plate is fitted with the connecting port between the leaching tank and the conveying cylinder, a guide plate is welded to the inner top surface of the leaching tank, and a dovetail groove is provided on the surface of the guide plate, a dovetail block is fixed to the side of the sealing plate, and the dovetail block is slidably connected to the dovetail groove of the guide plate.

[0012] Furthermore, the surface of the circulation pipe is connected to a flushing pipe, and a one-way valve is installed on the surface of the flushing pipe.

[0013] Furthermore, a wiring frame with a rectangular frame structure is welded on the upper surface of the leaching tank, and a plurality of wiring holes are opened between the wiring frame and the protective shell corresponding to the transducer.

[0014] Furthermore, the large opening of the material guiding horn is arranged upward, and two transverse support rods are arranged on the right side wall of the material guiding horn, and the two transverse support rods of the material guiding horn are welded to the inner wall of the leaching tank.

[0015] Furthermore, support legs are welded on both the left and right sides of the bottom of the leaching tank, and the support legs are in a right-angled triangle structure as a whole.

[0016] Furthermore, a plurality of concave holes are provided on the surface of each extension column of the auxiliary vibration rod, and the extension column of the auxiliary vibration rod is arranged toward the center of the protective shell.

[0017] Furthermore, a scraper strip is welded to the bottom of the shaft rod, and the bottom surface of the scraper strip is in contact with the top surface of the filter disc, and a plurality of arc blades are arranged around each crushing knife group of the shaft rod.

[0018] Furthermore, the protective shell is annular in structure as a whole, and a plurality of elastic parts are arranged around the bottom surface of the protective shell, and the plurality of elastic parts of the protective shell correspond one-to-one to a plurality of transducers, and a clearance hole is opened on the surface of the elastic part corresponding to the mounting seat.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides a device for extracting natural pigments from vegetables, which has the following beneficial effects:

[0021] (1) The present invention starts the ultrasonic generator installed on the inner wall of the extraction tank, prompting the ultrasonic generator to convert electrical energy into high-frequency mechanical oscillation through the transducer. Since the plurality of transducers arranged in the protective shell are electrically connected to the ultrasonic generator, and the bottom of each transducer is interference-connected with an auxiliary vibration rod with an extension column, and the auxiliary vibration rod is immersed in the extraction solvent of the extraction tank, under the cavitation and mechanical action of the transducer and the auxiliary vibration rod on the extraction solvent, on the one hand, the ultrasonic wave breaks the cell wall of the vegetable fragments, so that the natural pigment is in a free state and dissolved in the extraction solvent, and on the other hand, it can accelerate the molecular movement of the extraction solvent, so that the extraction solvent and the natural pigment in the vegetables are in rapid contact, which is easy to deeply extract the natural pigment. Compared with the existing heating or drug extraction method, the present invention is based on solvent extraction and supplemented by ultrasonic high-frequency mechanical oscillation, and adopts a plurality of groups of transducers and auxiliary vibration rods arranged in a ring, so as to maximize the contact effect between the ultrasonic wave and the extraction solvent, so as to meet the demand for deep extraction of natural pigments.

[0022] (2) The present invention starts the first motor on the top of the pretreatment box, causing the output end of the first motor to drive a number of crushing knife groups equidistantly installed on the surface of the shaft to rotate at high speed, so that the vegetable raw materials fed from the feed port are crushed by the several crushing knife groups. During this process, as the natural pigment extraction solvent is injected into the pretreatment tank, the slurry pump built into the pretreatment tank is started, causing the vegetable crushing slurry to circulate back and forth between the pretreatment tank and the circulation pipe, thereby achieving the effect of circulating crushing of the vegetable raw materials. While meeting the efficient crushing of the vegetable raw materials, the problem of filter disc blockage is solved, providing a solid foundation for the subsequent extraction of natural pigments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the external structure of a device for extracting natural pigments from vegetables according to an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of the internal structure of a device for extracting natural pigments from vegetables according to an embodiment of the present invention;

[0026] Figure 3 is a cross-sectional view of an extraction tank of a device for extracting natural pigments from vegetables according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a blocking plate and a guide plate of a device for extracting natural pigments from vegetables according to an embodiment of the present invention;

[0028] Figure 5 is a cross-sectional view of a pretreatment tank of a device for extracting natural pigments from vegetables according to an embodiment of the present invention;

[0029] Figure 6 yes Figure 2 A magnified view of the structure of A;

[0030] Figure 7 The present invention is a schematic diagram of the structure of a transducer and an auxiliary vibration rod of a device for extracting natural pigments from vegetables according to an embodiment of the present invention.

[0031] In the figure:

[0032] 1. Extraction tank; 2. Pretreatment tank; 3. First motor; 4. Feed inlet; 5. Circulation pipe; 6. Flushing pipe; 7. Wiring frame; 8. Liquid outlet pipe; 9. Support foot; 10. Electric push rod; 11. Conveying cylinder; 12. Second motor; 13. Auger; 14. Shaft; 15. Crushing knife group; 16. Oblique baffle; 17. Slurry pump; 18. Ultrasonic generator; 19. Filter plate; 20. Guide plate; 21. Sealing plate; 22. Material guide horn; 23. Protective shell; 24. Transducer; 25. Auxiliary vibration rod; 26. Dovetail block; 27. Support block; 28. Dovetail groove; 29. ​​Scraper strip; 30. Elastic part; 31. Mounting sleeve; 32. Extension column; 33. Concave hole. DETAILED DESCRIPTION

[0033] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0034] According to an embodiment of the present invention, a device for extracting natural pigments from vegetables is provided.

[0035] The present invention will now be further described with reference to the accompanying drawings and specific embodiments. Figure 1-7 As shown, a natural pigment extraction device in vegetables according to an embodiment of the present invention comprises an leaching tank 1 and a pretreatment tank 2, the top of the leaching tank 1 is welded with the pretreatment tank 2, and the bottom of the pretreatment tank 2 is obliquely installed with a conveying cylinder 11, a second motor 12 is fixed to the top of the conveying cylinder 11, and the output end of the second motor 12 passes through the conveying cylinder 11 and is fixedly connected with an auger 13, the bottom end of the conveying cylinder 11 is connected with the leaching tank 1, a material guide horn 22 is welded to the inner wall of the leaching tank 1, and the material guide horn 22 is directly below the connection between the conveying cylinder 11 and the leaching tank 1, a protective shell 23 welded to the inner wall of the leaching tank 1 is arranged below the material guide horn 22, and a plurality of transducers 24 are arranged around the inside of the protective shell 23, an ultrasonic generator 18 is fixed to the outer wall of the leaching tank 1, and the output end of the ultrasonic generator 18 is electrically connected to a plurality of transducers 24 in the protective shell 23, and each transducer The bottom of the transducer 24 is provided with a mounting sleeve 31, and the mounting sleeve 31 is interference-connected with an auxiliary vibration rod 25, and a plurality of extension columns 32 are welded at equal intervals on the surface of the auxiliary vibration rod 25, and the auxiliary vibration rod 25 is immersed in the extraction solvent poured into the leaching tank 1, and the lower right side of the leaching tank 1 is connected with a liquid outlet pipe 8, wherein the auxiliary vibration rod 25 and the plurality of extension columns 32 on its surface serve as the "vibrator" of the transducer 24, and are used to emit ultrasonic waves into the extraction solvent. If the liquid level of the extraction solvent overflows to the installation position of the protective shell 23, the ultrasonic waves emitted by the transducer 24 can also be transmitted to the extraction solvent through the protective shell 23, so as to achieve the best ultrasonic extraction effect. The control method of the present invention is to control by manually starting and closing the switch, and the wiring diagram of the power element and the provision of power supply belong to the common knowledge in the art, so the present invention will no longer explain the control method and wiring arrangement in detail.

[0036] In one embodiment, a first motor 3 is fixed to the top of the pretreatment tank 2, and the output end of the first motor 3 is fixedly connected to a shaft 14 through a coupling, a plurality of crushing knife groups 15 are evenly installed on the lower surface of the shaft 14, and a filter plate 19 is connected to the bottom of the shaft 14 through a bearing, and the side of the filter plate 19 is connected to the inner wall of the pretreatment tank 2, and an inclined baffle 16 is welded to the right side of the inside of the pretreatment tank 2 corresponding to the feed port 4, and a slurry pump 17 is fixedly installed on the bottom surface of the inclined baffle 16, and a circulation pipe 5 is connected to the slurry pump 17, and the top end of the circulation pipe 5 extends to the top of the plurality of crushing knife groups 15, and the bottom end of the circulation pipe 5 extends to the top of the filter plate 19, by starting the first motor 3 on the top of the pretreatment box, the output end of the first motor 3 drives the plurality of crushing knife groups 15 evenly installed on the surface of the shaft 14 to rotate at a high speed, so that The vegetable raw materials fed from the feed port 4 are crushed by a plurality of crushing knife groups 15. During this process, as the natural pigment extraction solvent is injected into the pretreatment tank 2, the slurry pump 17 built into the pretreatment tank 2 is started, so that the vegetable crushed slurry can circulate back and forth between the pretreatment tank 2 and the circulation pipe 5, so that the vegetable crushed material that meets the aperture requirements of the filter disk 19 enters the bottom of the pretreatment tank 2, which is beneficial to increase the extraction efficiency of the natural pigment. Among them, the slurry pump 17 is mainly used when the filter disk 19 is blocked. That is, under normal working conditions, the rotation of the scraper bar 29 can maintain the patency of the filter disk 19. In order to prevent the vegetable crushed material from being blocked at the bottom of the pretreatment tank 2, an auxiliary stirring rod with an inclined rod is also installed at the bottom of the shaft 14 for stirring the vegetable crushed material at the bottom of the pretreatment tank 2.

[0037] In one embodiment, an electric push rod 10 is fixed to the upper surface of the leaching tank 1, and one end of the electric push rod 10 passes through the leaching tank 1 and is fixed with a support block 27, a sealing plate 21 is welded on the support block 27, and the sealing plate 21 is fitted with the connecting port between the leaching tank 1 and the conveying cylinder 11, a guide plate 20 is welded to the inner top surface of the leaching tank 1, and a dovetail groove 28 is opened on the surface of the guide plate 20, a dovetail block 26 is fixedly connected to the side of the sealing plate 21, and the dovetail block 26 is slidably connected to the dovetail groove 28 of the guide plate 20, and the electric push rod 10 is started to pull the sealing plate 21 to move to the right, so that the sealing plate 21 is disengaged from the blockage, so that the auger 13 pushes the crushed vegetables to the leaching tank 1.

[0038] In one embodiment, the surface of the circulation pipe 5 is connected to a flushing pipe 6, and a one-way valve is installed on the surface of the flushing pipe 6. Through the setting of the flushing pipe 6, it is easy to pour cleaning water into the circulation pipe 5 to flush the filter disc 19 in the pretreatment tank 2. The setting of the one-way valve can prevent the broken vegetables from flowing back into the flushing pipe 6.

[0039] In one embodiment, a wiring frame 7 with a rectangular frame structure is welded to the upper surface of the leaching tank 1, and a plurality of wiring holes are provided between the wiring frame 7 and the protective shell 23 corresponding to the transducers 24. Through the provision of the wiring frame 7, it is easy to arrange the wiring of a plurality of transducers 24 so that they can be electrically connected to the ultrasonic generator 18, and the wiring frame 7 shields the circuit to ensure aesthetics.

[0040] In one embodiment, the large opening of the material guiding horn 22 is arranged upward, and two transverse support rods are arranged on the right side wall of the material guiding horn 22, and the two transverse support rods of the material guiding horn 22 are welded to the inner wall of the leaching tank 1. Through the arrangement of the material guiding horn 22, the falling vegetable fragments can be guided to prevent the vegetable fragments from splashing and being adsorbed on the inner wall of the leaching tank 1.

[0041] In one embodiment, support legs 9 are welded to both left and right sides of the bottom of the leaching tank 1 , and the support legs 9 are in a right-angled triangle structure as a whole. By providing the support legs 9 , the support effect of the leaching tank 1 is increased.

[0042] In one embodiment, a plurality of recessed holes 33 are provided on the surface of each extension column 32 of the auxiliary vibration rod 25, and the extension column 32 of the auxiliary vibration rod 25 is arranged toward the center of the protective shell 23. The plurality of extension columns 32 of the auxiliary vibration rod 25 and the plurality of recessed holes 33 on the surface thereof are helpful to increase the range of action of the ultrasonic wave and increase the contact area between the auxiliary vibration rod 25 and the extraction solvent.

[0043] In one embodiment, a scraper strip 29 is welded to the bottom of the shaft rod 14, and the bottom surface of the scraper strip 29 contacts the top surface of the filter plate 19. A plurality of arc blades are arranged around each crushing knife group 15 of the shaft rod 14. Through the arrangement of the scraper strip 29, it is easy to scrape off the broken vegetables on the surface of the filter plate 19 to prevent clogging. The plurality of arc blades of the crushing knife group 15 facilitate the crushing of vegetables.

[0044] In one embodiment, the protective shell 23 is an annular structure as a whole, and a plurality of elastic parts 30 are arranged around the bottom surface of the protective shell 23, and the plurality of elastic parts 30 of the protective shell 23 correspond one to one with a plurality of transducers 24, and a clearance hole is opened on the surface of the elastic part 30 corresponding to the mounting sleeve 31, and the material of the elastic part 30 can be rubber, silicone or resin, and its purpose is to facilitate the auxiliary vibration rod 25 to make high-frequency mechanical oscillation.

[0045] Working principle:

[0046] First, the vegetable raw materials are washed and dried and then put into the feed port 4. By starting the first motor 3 on the top of the pretreatment box, the output end of the first motor 3 drives the several crushing knife groups 15 equidistantly installed on the surface of the shaft 14 to rotate at high speed, so that the vegetable raw materials put in from the feed port 4 are crushed by the several crushing knife groups 15. During this process, as the natural pigment extraction solvent is injected into the pretreatment tank 2, the slurry pump 17 built into the pretreatment tank 2 is started, so that the vegetable crushing slurry can circulate back and forth between the pretreatment tank 2 and the circulation pipe 5, so that the vegetable crushed material that meets the aperture requirements of the filter disk 19 enters the bottom of the pretreatment tank 2, and then the second motor 12 is started to drive the auger 13 in the conveying cylinder 11 to rotate, and the electric push rod 10 is started to pull the sealing plate 21 to move to the right, so that the auger 13 pushes the vegetable crushed material to the extraction tank 1. When the natural pigment is extracted, the extraction tank 1 is started. The ultrasonic generator 18 installed on the inner wall surface causes the ultrasonic generator 18 to convert electrical energy into high-frequency mechanical vibrations via the transducer 24. Since the plurality of transducers 24 arranged around the protective shell 23 are electrically connected to the ultrasonic generator 18, and the bottom of each transducer 24 is interference-connected with the auxiliary vibration rod 25 with the extension column 32, and the auxiliary vibration rod 25 is immersed in the extraction solvent of the leaching tank 1, under the cavitation and mechanical action of the transducer 24 and the auxiliary vibration rod 25 on the extraction solvent, on the one hand, the ultrasonic wave breaks the cell wall of the vegetable fragments, so that the natural pigment is in a free state and dissolved in the extraction solvent, and on the other hand, it can accelerate the molecular movement of the extraction solvent, so that the extraction solvent and the natural pigment in the vegetables are quickly in contact, which is easy to extract the natural pigment deeply. Finally, the extraction solvent containing the natural pigment is concentrated, dried and packaged after solvent recovery.

[0047] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for extracting natural pigments from vegetables, characterized in that: The invention comprises an extraction tank (1) and a pretreatment tank (2), wherein the top of the extraction tank (1) is welded with the pretreatment tank (2), and the bottom of the pretreatment tank (2) is obliquely installed with a conveying cylinder (11), the top of the conveying cylinder (11) is fixed with a second motor (12), and the output end of the second motor (12) passes through the conveying cylinder (11) and is fixedly connected with a screw (13), the bottom end of the conveying cylinder (11) is connected with the extraction tank (1), the inner wall surface of the extraction tank (1) is welded with a material guide horn (22), and the material guide horn (22) is located directly below the connection point between the conveying cylinder (11) and the extraction tank (1), and a waterproof material welded to the inner wall of the extraction tank (1) is arranged below the material guide horn (22). A protective shell (23) is provided, and a plurality of transducers (24) are arranged around the interior of the protective shell (23); an ultrasonic generator (18) is fixed on the outer wall of the leaching tank (1), and the output end of the ultrasonic generator (18) is electrically connected to the plurality of transducers (24) in the protective shell (23); a mounting sleeve (31) is provided at the bottom of each of the transducers (24), and an auxiliary vibration rod (25) is interference-connected in the mounting sleeve (31); a plurality of extension columns (32) are welded at equal intervals on the surface of the auxiliary vibration rod (25), and the auxiliary vibration rod (25) is immersed in the extraction solvent poured into the leaching tank (1); and a liquid outlet pipe (8) is connected to the right side of the lower part of the leaching tank (1).

2. The device for extracting natural pigments from vegetables according to claim 1, characterized in that: A first motor (3) is fixed on the top of the pretreatment tank (2), and the output end of the first motor (3) is fixedly connected to a shaft (14) through a coupling, a plurality of crushing knife groups (15) are installed at equal intervals on the lower surface of the shaft (14), and a filter plate (19) is connected to the bottom of the shaft (14) through a bearing, and the side of the filter plate (19) is connected to the inner wall of the pretreatment tank (2), and an inclined baffle (16) is welded on the right side of the inside of the pretreatment tank (2) corresponding to the feed port (4), and a slurry pump (17) is fixedly installed on the bottom surface of the inclined baffle (16), and the slurry pump (17) is connected to a circulation pipe (5), and the top end of the circulation pipe (5) extends to the top of the plurality of crushing knife groups (15), and the bottom end of the circulation pipe (5) extends to the top of the filter plate (19).

3. The device for extracting natural pigments from vegetables according to claim 1, characterized in that: An electric push rod (10) is fixed on the upper surface of the leaching tank (1), and one end of the electric push rod (10) passes through the leaching tank (1) and is fixed with a support block (27). A sealing plate (21) is welded on the support block (27), and the sealing plate (21) is in contact with the connecting port between the leaching tank (1) and the conveying cylinder (11). A guide plate (20) is welded on the inner top surface of the leaching tank (1), and a dovetail groove (28) is provided on the surface of the guide plate (20). A dovetail block (26) is fixedly connected to the side of the sealing plate (21), and the dovetail block (26) is slidably connected to the dovetail groove (28) of the guide plate (20).

4. The device for extracting natural pigments from vegetables according to claim 2, characterized in that: The surface of the circulation pipe (5) is connected to a flushing pipe (6), and a one-way valve is installed on the surface of the flushing pipe (6).

5. The device for extracting natural pigments from vegetables according to claim 1, characterized in that: A wiring frame (7) with a rectangular frame structure is welded on the upper surface of the leaching tank (1), and a plurality of wiring holes are provided between the wiring frame (7) and the protective shell (23) corresponding to the transducer (24).

6. The device for extracting natural pigments from vegetables according to claim 1, characterized in that: The large opening of the material guiding horn (22) is arranged upward, and two transverse supporting rods are arranged on the right side wall of the material guiding horn (22), and the two transverse supporting rods of the material guiding horn (22) are welded to the inner wall of the leaching tank (1).

7. The device for extracting natural pigments from vegetables according to claim 1, characterized in that: Support legs (9) are welded to the left and right sides of the bottom of the extraction tank (1), and the support legs (9) are in a right-angled triangle structure as a whole.

8. The device for extracting natural pigments from vegetables according to claim 1, characterized in that: A plurality of concave holes (33) are provided on the surface of each extension column (32) of the auxiliary vibration rod (25), and the extension column (32) of the auxiliary vibration rod (25) is arranged toward the center of the protective shell (23).

9. The device for extracting natural pigments from vegetables according to claim 2, characterized in that: A scraper strip (29) is welded to the bottom of the shaft rod (14), and the bottom surface of the scraper strip (29) is in contact with the top surface of the filter plate (19). A plurality of arc blades are arranged around each crushing knife group (15) of the shaft rod (14).

10. The device for extracting natural pigments from vegetables according to claim 1, characterized in that: The protective shell (23) is an annular structure as a whole, and a plurality of elastic parts (30) are arranged around the bottom surface of the protective shell (23), and the plurality of elastic parts (30) of the protective shell (23) correspond one-to-one to the plurality of transducers (24), and a clearance hole is opened on the surface of the elastic part (30) corresponding to the mounting seat (31).

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