Microwave extraction equipment for extracting rapeseed oil

Abstract

The invention relates to the technical field of microwave extraction, in particular to microwave extraction equipment for rapeseed oil extraction, which comprises a box body, an extraction chamber and an equipment chamber are arranged in the box body, a microwave extraction mechanism is arranged in the extraction chamber, and the microwave extraction mechanism comprises a first turntable rotationally connected to the bottom end in the extraction chamber; the upper end of the first rotating disc is rotationally connected with a second rotating disc, a support and an infrared temperature sensor are arranged at the upper end of the second rotating disc, a container outer bottle is clamped at the upper end of the support, an outer cover is arranged at the upper end of the container outer bottle, and the infrared temperature sensor is used for monitoring the temperature in the container outer bottle. By designing the microwave extraction mechanism, the inner cylinder, the parting strip and the container inner bottle form the spiral channel for guiding the steam direction, so that the steam retention time is prolonged, the steam heats the periphery and the outer wall of the bottom end of the container inner bottle along the threaded channel, and an auxiliary material is conveniently and rapidly diffused into a solvent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of microwave extraction, and particularly relates to a microwave extraction device for extracting oil and fat from rapeseed. BACKGROUND

[0002] High-frequency electromagnetic waves make the polar molecules in the rapeseed rotate at high speed, resulting in violent friction and collision, which leads to rapid temperature rise inside the cells, pressure exceeding the bearing capacity of the cell wall, cell rupture, free flow of effective components such as oil and fat, and dissolution in the extraction solvent, and the extraction material can be obtained by filtration separation. In the microwave field, water molecules rotate at high speed to become an excited state, which is a high-energy unstable state. The water molecules release energy to return to the ground state, and the released energy is transferred to other molecular substances to accelerate their thermal motion, shorten the diffusion time of extraction components from the material inside to the extraction solvent interface, thereby increasing the extraction rate by several times, and reducing the extraction temperature, thereby maximizing the extraction quality.

[0003] When the microwave extraction of rapeseed material is performed, if the microwave energy is not uniformly scanned, the material is heated with insufficient microwave absorption, and local overheating and underheating coexist, local overheating is easy to cause solvent violent boiling, and underheating will cause part of the cells not to be broken, and the effective components are left in the matrix, resulting in incomplete release of oil and fat, and the extraction rate is significantly reduced. The steam generated by extraction contains a large amount of high-heat energy, but the existing equipment lacks utilization structure, resulting in direct dissipation of steam waste heat, which not only causes energy waste, but also requires additional energy consumption to maintain the extraction temperature, thereby reducing the overall process energy efficiency ratio and economy.

[0004] Therefore, the present application provides a microwave extraction device for extracting oil and fat from rapeseed. SUMMARY

[0005] The present application aims to provide a microwave extraction device for extracting oil and fat from rapeseed to solve the problems of poor microwave energy propagation effect and waste of steam waste heat in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a microwave extraction device for extracting rapeseed oil, comprising a housing, wherein the housing has an extraction chamber and an equipment chamber, and a microwave extraction mechanism is installed inside the extraction chamber. The microwave extraction mechanism includes a first turntable rotatably connected to the bottom of the extraction chamber, a second turntable rotatably connected to the upper end of the first turntable, a support and an infrared temperature sensor being installed on the upper end of the second turntable, an outer container being held in place on the upper end of the support, an outer cap being installed on the upper end of the outer container, and an infrared temperature sensor being used to monitor the temperature inside the outer container. A controller is installed at the upper front of the housing. The microwave extraction device also includes the microwave extraction mechanism and a coaxial... The microwave extraction mechanism, including the reversing mechanism and solvent recovery mechanism, not only guides the direction of steam and extends its residence time, allowing residual steam heat to assist the rapid diffusion of materials into the solvent, but also guides microwave scattering, improving microwave coverage and preventing microwave offsetting. The coaxial reversing mechanism drives the first and second turntables to rotate in opposite directions, ensuring that microwave energy evenly covers the rapeseed inside the outer bottle, preventing localized overheating and uneven heating of the rapeseed particles. It also meets the coverage requirements at a low speed, preventing excessive centrifugal force of the solvent inside the outer bottle from causing splashing. The solvent recovery mechanism cools and liquefies the steam and recovers the liquefied solvent.

[0007] Preferably, an inner bottle is fixedly connected to the bottom of the outer bottle, and an inner cylinder is fixedly connected to the top of the outer cap via a connecting rod. A partition is fixedly connected to the inner wall of the inner cylinder, and a notch is provided on one side of the inner cylinder.

[0008] Preferably, the spacer is arranged in a spiral shape, and the inner cylinder, spacer, and inner bottle of the container can be combined to form a spiral channel. The outer bottle, inner bottle, outer cap, inner cylinder, and spacer are all made of glass.

[0009] Preferably, a metal waveguide box is fixedly connected to the upper end of the second turntable, a sealed glass is fixedly installed on the side of the metal waveguide box near the center of the second turntable, a microwave generator is fixedly installed on the side of the metal waveguide box away from the center of the second turntable, a stirring rod is rotatably connected to the top of the inner cylinder, and metal blades are provided around the outer perimeter of the stirring rod.

[0010] Preferably, the coaxial reversing mechanism includes a low-speed motor fixedly installed inside the equipment room. The output shaft of the low-speed motor is fixedly connected to a first gear, which meshes with a second gear. The upper end of the second gear is fixedly connected to a first pulley. The first pulley is rotatably connected to the inner wall of the equipment room. The first pulley is connected to a second pulley via a belt drive. The second pulley is fixed to the bottom end of the first turntable via a cylinder.

[0011] Preferably, the bottom end of the first gear is fixedly provided with a third belt pulley, the third belt pulley is connected with a fourth belt pulley through a belt drive, and the fourth belt pulley penetrates the first rotating disc through a round rod and is fixedly connected to the bottom end of the second rotating disc.

[0012] Preferably, the solvent recovery mechanism comprises a gas inlet pipe fixedly connected to the upper end of the outer cover, the gas inlet pipe is sleeved on the guide pipe, the upper end of the guide pipe is provided with a cooler, one side of the guide pipe is fixedly connected with a first return pipe, the bottom end of the first return pipe is inserted into the liquid collecting tank, and the liquid collecting tank is fixedly mounted on the side of the box.

[0013] Preferably, the bottom end of the container outer bottle is fixedly connected with a liquid discharge pipe, the liquid discharge pipe is provided with a stop valve, the bottom end of the liquid discharge pipe is inserted into the interface at the upper end of the second return pipe, and the bottom end of the second return pipe is inserted into the liquid collecting tank.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. The present application designs a microwave extraction mechanism, utilizes the inner cylinder, the partition strip and the container inner bottle to form a spiral channel for guiding the steam direction, prolongs the steam residence time, makes the steam heat the outer wall of the four sides and the bottom end of the container inner bottle along the spiral channel, facilitates the rapid diffusion of the auxiliary material into the solvent, utilizes the metal waveguide box to guide the microwave energy to a fixed direction, improves the accuracy of the microwave energy effect, utilizes the metal blade to reflect the microwave, not only can make the microwave scatter to the dead angle, improve the effect, but also can inhibit the collision of the microwave energy of the two groups of microwave generators, improve the utilization efficiency of the microwave energy.

[0016] 2. The present application designs a coaxial reverse mechanism cooperating with the microwave extraction mechanism, utilizes the coaxial reverse rotation of the first rotating disc and the second rotating disc, greatly shortens the time for one circle of microwave energy scanning, effectively improves the microwave scanning effect, facilitates the adaptation of the low-speed motor with relatively low speed, because the low-speed motor with relatively low speed has relatively small starting torque, runs more stably, and also can make the running vibration and noise relatively small, greatly improves the stability and reliability of the equipment, and the rotation of the container outer bottle can drive the internal mixed solvent to form a vortex, the vortex action of the mixed solvent on the metal blade makes the metal blade play the role of differential stirring.

[0017] 3. The present application designs a solvent recovery mechanism cooperating with the microwave extraction mechanism, can liquefy and recover the steam generated by the microwave extraction, not only can avoid the interference of the steam on the microwave extraction process, but also can effectively recover and utilize the solvent, reduces the waste of the solvent. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to make the technical solutions in the present application or prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only aim at the present application, and for ordinary persons skilled in the art, other drawings can also be obtained without any creative effort.

[0019] Figure 1 It is a whole perspective schematic view of the embodiment of the present application.

[0020] Figure 2 It is a perspective schematic view of the coaxial reversing mechanism of the embodiment of the present application.

[0021] Figure 3 It is a partial exploded schematic view of the microwave extraction mechanism of the embodiment of the present application. Figure 1 ;

[0022] Figure 4 It is a partial exploded schematic view of the microwave extraction mechanism of the embodiment of the present application. Figure 2 ;

[0023] Figure 5 It is a top view schematic view of the embodiment of the present application.

[0024] Figure 6 It is a sectional view schematic view at A-A of the embodiment of the present application. Figure 5 ;

[0025] Figure 7 It is an enlarged schematic view at B of the embodiment of the present application. Figure 6 ;

[0026] Figure 8 It is an enlarged schematic view at C of the embodiment of the present application. Figure 6 ;

[0027] In the figure, the marks are as follows: 1, box body; 11, extraction chamber; 12, equipment chamber; 2, microwave extraction mechanism; 21, first rotating disc; 22, second rotating disc; 221, support; 222, infrared temperature sensor; 23, outer bottle; 231, inner bottle; 24, outer cover; 241, inner cylinder; 242, partition strip; 243, opening; 25, metal waveguide box; 251, sealing glass; 26, microwave generator; 27, stirring rod; 271, metal blade; 3, coaxial reversing mechanism; 31, low-speed motor; 32, first gear; 33, second gear; 34, first pulley; 35, second pulley; 36, third pulley; 37, fourth pulley; 4, solvent recovery mechanism; 41, gas conveying pipe; 42, guide pipe; 43, cooler; 44, first return pipe; 45, liquid collecting box; 46, liquid discharging pipe; 461, stop valve; 47, second return pipe; 5, controller. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with specific embodiments.

[0029] It should be noted that, unless otherwise defined, technical terms or scientific terms used in the present application should be understood as their common meanings to those having ordinary skills in the art to which the present application pertains. The terms "first", "second" and similar terms used in the present application do not denote any order, quantity or importance, but are only used to distinguish different components. The terms "comprising" or "including" and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" and similar terms do not mean physical or mechanical connection, but can include electrical connection, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like only represent relative positional relationships, which can change accordingly when the absolute positions of the described objects change.

[0030] Please refer to Figures 1 to 8 The present application provides a technical solution: a microwave extraction device for rapeseed oil extraction, comprising a box body 1, an extraction chamber 11 and a device chamber 12 are formed in the inside of the box body 1, a microwave extraction mechanism 2 is arranged in the inside of the extraction chamber 11, the microwave extraction mechanism 2 comprises a first rotating disc 21 rotatably connected to the bottom end of the inside of the extraction chamber 11, the upper end of the first rotating disc 21 is rotatably connected with a second rotating disc 22, the upper end of the second rotating disc 22 is provided with a bracket 221 and an infrared temperature sensor 222, a container outer bottle 23 is clamped on the upper end of the bracket 221, an outer cover 24 is arranged on the upper end of the container outer bottle 23, the infrared temperature sensor 222 is used for monitoring the temperature in the inside of the container outer bottle 23, a controller 5 is arranged on the upper part of the front end of the box body 1, the microwave extraction device further comprises the microwave extraction mechanism 2, a coaxial reverse mechanism 3 and a solvent recovery mechanism 4, the microwave extraction mechanism 2 not only can guide the steam direction, prolong the steam residence time, and make the steam waste heat assist the material to quickly diffuse into the solvent, but also can guide the microwave scattering, improve the microwave coverage effect, and avoid the microwave from appearing to consume, the coaxial reverse mechanism 3 can drive the first rotating disc 21 and the second rotating disc 22 to perform coaxial reverse rotary motion, which can not only make the microwave energy uniformly cover the rapeseed in the container outer bottle 23, avoid the local overheating and uneven heating of the rapeseed particles, but also can meet the coverage requirement at low speed, avoid the solvent in the container outer bottle 23 from splashing due to excessive centrifugal force, and the solvent recovery mechanism 4 can cool and liquefy the steam, and recover the liquefied solvent.

[0031] As an embodiment of the present application, as Figure 3 , Figure 4 and Figure 7As shown, the inner bottom end of the container outer bottle 23 is fixedly connected with a container inner bottle 231, the inner top end of the outer cover 24 is fixedly connected with an inner cylinder 241 through a connecting rod, the inner wall of the inner cylinder 241 is fixedly connected with a partition strip 242, an opening 243 is arranged on one side of the inner cylinder 241, the partition strip 242 is arranged in a spiral shape, the inner cylinder 241, the partition strip 242 and the container inner bottle 231 can be combined into a spiral channel, the container outer bottle 23, the container inner bottle 231, the outer cover 24, the inner cylinder 241 and the partition strip 242 are all glass products, the upper end of the second turntable 22 is fixedly connected with a metal waveguide box 25, the side of the metal waveguide box 25 close to the center of the second turntable 22 is fixedly installed with a sealing glass 251, the side of the metal waveguide box 25 away from the center of the second turntable 22 is fixedly installed with a microwave generator 26, the inner top end of the inner cylinder 241 is rotatably connected with a stirring rod 27, and metal blades 271 are arranged on the outer side of the stirring rod 27.

[0032] By adopting the above technical scheme, when in use, the rapeseed is placed into the container inner bottle 231 inside the container outer bottle 23, then the mixed solvent of n-hexane and acetone used for extraction is added above the rapeseed, then the controller 5 controls the two groups of microwave generators 26 to generate microwave energy, the microwave energy is guided by the metal waveguide box 25 and propagates to the rapeseed particles inside the container inner bottle 231, so that the rapeseed cells are broken and the oil components flow out, then when the microwave energy approaches the center of the second turntable 22, the metal blades 271 on the stirring rod 27 scatter the microwave energy, so that the microwave energy more effectively acts on the rapeseed particles, then the moisture in the rapeseed rapidly warms up and vaporizes under the action of the microwave to form steam, because the inner cylinder 241, the partition strip 242 and the container inner bottle 231 can be combined into a spiral channel and the opening 243 is arranged at the bottom end of the gas conveying pipe 41, the steam heats the outer walls of the four sides and the bottom end of the container inner bottle 231 along the spiral channel, so that the oil broken out of the cells rapidly diffuses into the solvent, which is convenient for extraction, then the steam reaches the top of the outer cover 24 along the channel formed by the container outer bottle 23 and the inner cylinder 241, which is conducive to utilizing the spiral channel formed by the inner cylinder 241, the partition strip 242 and the container inner bottle 231 to guide the direction of the steam, prolonging the residence time of the steam, so that the steam heats the outer walls of the four sides and the bottom end of the container inner bottle 231 along the spiral channel, which is convenient for assisting the rapid diffusion of the material into the solvent, and the microwave energy is guided in a fixed direction by the metal waveguide box 25, which improves the accuracy of the action of the microwave energy, the microwave is reflected by the metal blades 271, which not only can scatter the microwave to dead angles to improve the action effect, but also can inhibit the collision of the microwave energy of the two groups of microwave generators 26 to improve the utilization efficiency of the microwave energy.

[0033] As an embodiment of the present application, as shown in Figure 1 , Figure 2 and Figure 8As shown, the coaxial reverse mechanism 3 comprises a low-speed motor 31 fixedly installed inside the equipment chamber 12, the output shaft of the low-speed motor 31 is fixedly connected with a first gear 32, the first gear 32 is engaged with a second gear 33, the upper end of the second gear 33 is fixedly connected with a first belt pulley 34, the first belt pulley 34 is rotationally connected to the inner wall of the equipment chamber 12, the first belt pulley 34 is drivingly connected with a second belt pulley 35 through a belt, the second belt pulley 35 is fixed to the bottom end of the first rotating disc 21 through a cylinder, the bottom end of the first gear 32 is fixedly installed with a third belt pulley 36, the third belt pulley 36 is drivingly connected with a fourth belt pulley 37 through a belt, the fourth belt pulley 37 is fixedly connected to the bottom end of the second rotating disc 22 through a round rod penetrating the first rotating disc 21.

[0034] By adopting the above technical scheme, the low-speed motor 31 can drive the first gear 32 and the third belt pulley 36 to rotate at the same time, because the first gear 32 is engaged with the second gear 33, and the first belt pulley 34 at the upper end of the second gear 33 is drivingly connected with the second belt pulley 35 through a belt, so the first gear 32 can drive the first rotating disc 21 at the upper end of the second belt pulley 35 to rotate counterclockwise, and because the third belt pulley 36 is drivingly connected with the fourth belt pulley 37 through a belt, so the third belt pulley 36 can drive the second rotating disc 22 to rotate clockwise, and because the metal waveguide box 25 and the microwave generator 26 are arranged at the upper end of the first rotating disc 21, and the container outer bottle 23 is arranged in the bracket 221 at the upper end of the second rotating disc 22, so the low-speed motor 31 can drive the first rotating disc 21 and the second rotating disc 22 to perform coaxial reverse rotation at the same time, so that the microwave energy generated by the metal waveguide box 25 at the upper end of the first rotating disc 21 can better act on the rapeseed in the container outer bottle 23, and finally the second rotating disc 22 drives the rapeseed in the container outer bottle 23 to rotate, at the same time, the solvent in the container inner bottle 231 forms a vortex, and the vortex of the solvent acts on the metal blade 271 outside the stirring rod 27 to easily form a turbulent flow, so that the metal blade 271 can stir the solvent, which is beneficial to the coaxial reverse rotation of the first rotating disc 21 and the second rotating disc 22, so that the time for the microwave energy to scan a circle is greatly shortened, the microwave scanning effect is effectively improved, the low-speed motor 31 with low rotating speed is conveniently adapted, because the low-speed motor 31 with low rotating speed has relatively small starting torque, runs more stably, and has relatively small running vibration and noise, so the stability and reliability of the equipment are greatly improved, and the rotation of the container outer bottle 23 can drive the internal mixed solvent to form a vortex, and the vortex of the mixed solvent acts on the metal blade 271, so that the metal blade 271 can play a differential stirring role.

[0035] As an embodiment of the present application, as shown in Figure 1 , Figure 6 and Figure 8As shown, the solvent recovery mechanism 4 includes a gas delivery pipe 41 fixedly connected to the upper end of the outer cover 24, the gas delivery pipe 41 is sleeved on a guide pipe 42, the upper end of the guide pipe 42 is provided with a cooler 43, one side of the guide pipe 42 is fixedly connected with a first return pipe 44, the bottom end of the first return pipe 44 is inserted into a liquid collection tank 45, the liquid collection tank 45 is fixedly installed on the side of the box body 1, the bottom end of the container outer bottle 23 is fixedly connected with a liquid discharge pipe 46, the liquid discharge pipe 46 is provided with a stop valve 461, the bottom end of the liquid discharge pipe 46 is inserted into the interface of the upper end of a second return pipe 47, the bottom end of the second return pipe 47 is inserted into the liquid collection tank 45.

[0036] By adopting the above technical scheme, the steam gathered at the top end of the outer cover 24 is cooled in the cooler 43 through the gas delivery pipe 41 and the guide pipe 42, the cooled liquid solvent enters the first return pipe 44 along the inner wall of the guide pipe 42, and then flows into the liquid collection tank 45 through the first return pipe 44, the auxiliary heating of the steam in the container outer bottle 23 and the inner part of the outer cover 24 can cause part of the steam to liquefy, form a solvent and gather to the bottom end of the container outer bottle 23, then the stop valve 461 on the liquid discharge pipe 46 is opened, the liquefied solvent at the bottom end in the container outer bottle 23 flows into the liquid collection tank 45 through the liquid discharge pipe 46 and the second return pipe 47, which is beneficial to liquefy and recover the steam generated by the microwave extraction, not only can avoid the interference of the steam on the microwave extraction process, but also can effectively recycle and utilize the solvent, reducing the waste of the solvent.

[0037] Working principle: in use, the rapeseed is placed in the container inner bottle 231 in the container outer bottle 23, then the mixed solvent of n-hexane and acetone used for extraction is added above the rapeseed, then the controller 5 controls the two groups of microwave generators 26 to generate microwave energy, the microwave energy is guided by the metal waveguide box 25 and propagates to the rapeseed particles in the container inner bottle 231, so that the rapeseed cells are broken and the oil components flow out, then when the microwave energy approaches the center of the second turntable 22, the metal blades 271 on the stirring rod 27 scatter the microwave energy, so that the microwave energy can more effectively act on the rapeseed particles, then the moisture in the rapeseed is rapidly heated and vaporized under the action of the microwave to form steam, because the inner cylinder 241, the partition strip 242 and the container inner bottle 231 can be combined into a spiral channel, the bottom end of the gas delivery pipe 41 is provided with an opening 243, so the steam heats the outer walls of the four sides and the bottom end of the container inner bottle 231 along the spiral channel, so that the oil broken out of the cells rapidly diffuses into the solvent, facilitating extraction, then the steam reaches the top of the outer cover 24 along the channel formed by the container outer bottle 23 and the inner cylinder 241;

[0038] The low-speed motor 31 can drive the first gear 32 and the third pulley 36 to rotate at the same time, because the first gear 32 engages the second gear 33, the first pulley 34 at the upper end of the second gear 33 is in transmission connection with the second pulley 35 through a belt, so the first gear 32 can drive the first rotating disc 21 at the upper end of the second pulley 35 to rotate counterclockwise, at the same time, because the third pulley 36 is in transmission connection with the fourth pulley 37 through a belt, so the third pulley 36 can drive the second rotating disc 22 to rotate clockwise, and because the first rotating disc 21 is provided with the metal waveguide box 25 and the microwave generator 26 at the upper end, and the container outer bottle 23 is placed in the support 221 at the upper end of the second rotating disc 22, so the low-speed motor 31 can drive the first rotating disc 21 and the second rotating disc 22 to rotate coaxially and reversely at the same time, so that the microwave energy generated by the metal waveguide box 25 at the upper end of the first rotating disc 21 can better act on the rapeseed in the container outer bottle 23, and finally, the second rotating disc 22 drives the rapeseed in the container outer bottle 23 to rotate, at the same time, the solvent in the container inner bottle 231 forms a vortex, and the vortex of the solvent acts on the metal blade 271 outside the stirring rod 27 to easily form a turbulent flow, so that the metal blade 271 stirs the solvent;

[0039] The steam gathered at the top end of the outer cover 24 enters the cooler 43 through the gas conveying pipe 41 and the guide pipe 42 and is cooled, and the cooled liquid solvent enters the first reflux pipe 44 along the inner wall of the guide pipe 42 and then flows into the liquid collecting tank 45 from the first reflux pipe 44, the auxiliary heating of the steam in the container outer bottle 23 and the inner cover 24 can cause part of the steam to be liquefied to form the solvent and gather at the bottom end of the container outer bottle 23, then the stop valve 461 on the liquid discharge pipe 46 is opened, so that the liquefied solvent at the bottom end in the container outer bottle 23 flows into the liquid collecting tank 45 through the liquid discharge pipe 46 and the second reflux pipe 47.

[0040] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0041] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A microwave extraction device for extracting rapeseed oil, comprising a housing (1), wherein the housing (1) has an extraction chamber (11) and an equipment chamber (12) inside, wherein a microwave extraction mechanism (2) is provided inside the extraction chamber (11), the microwave extraction mechanism (2) comprising a first turntable (21) rotatably connected to the bottom of the extraction chamber (11), a second turntable (22) rotatably connected to the upper end of the first turntable (21), a bracket (221) and an infrared temperature sensor (222) being provided at the upper end of the second turntable (22), an outer container bottle (23) being clamped at the upper end of the bracket (221), an outer cap (24) being provided at the upper end of the outer container bottle (23), the infrared temperature sensor (222) being used to monitor the temperature inside the outer container bottle (23), and a controller (5) being provided at the upper front end of the housing (1), characterized in that: The microwave extraction equipment also includes a microwave extraction mechanism (2), a coaxial reversal mechanism (3), and a solvent recovery mechanism (4). The microwave extraction mechanism (2) can not only guide the direction of steam and extend the residence time of steam so that the residual heat of steam can help the material to diffuse quickly into the solvent, but also guide microwave scattering, improve the microwave coverage effect, and avoid microwave offset consumption. The coaxial reversal mechanism (3) can drive the first turntable (21) and the second turntable (22) to rotate in opposite directions on the same axis. This can make the microwave energy evenly cover the rapeseed in the outer bottle (23) of the container, avoid local overheating and uneven heating of the rapeseed particles, and meet the coverage requirements at a low speed, so as to avoid excessive centrifugal force of the solvent in the outer bottle (23) of the container from splashing. The solvent recovery mechanism (4) can cool and liquefy the steam and recover the liquefied solvent.

2. The microwave extraction device for rapeseed oil extraction according to claim 1, characterized in that, The inner bottom of the outer bottle (23) is fixedly connected to the inner bottle (231), and the inner top of the outer cover (24) is fixedly connected to the inner cylinder (241) by a connecting rod. The inner wall of the inner cylinder (241) is fixedly connected to a partition strip (242), and a notch (243) is opened on one side of the inner cylinder (241).

3. The microwave extraction device for rapeseed oil extraction according to claim 2, characterized in that, The spacer (242) is spirally arranged, and the inner cylinder (241), spacer (242) and inner bottle (231) can be combined to form a spiral channel. The outer bottle (23), inner bottle (231), outer cap (24), inner cylinder (241) and spacer (242) are all glass products.

4. The microwave extraction device for rapeseed oil extraction according to claim 3, characterized in that, A metal waveguide box (25) is fixedly connected to the upper end of the second turntable (22). A sealing glass (251) is fixedly installed on the side of the metal waveguide box (25) near the center of the second turntable (22). A microwave generator (26) is fixedly installed on the side of the metal waveguide box (25) away from the center of the second turntable (22). A stirring rod (27) is rotatably connected to the top of the inner cylinder (241). Metal blades (271) are arranged around the outer periphery of the stirring rod (27).

5. The microwave extraction device for rapeseed oil extraction according to claim 1, characterized in that, The coaxial reversing mechanism (3) includes a low-speed motor (31) fixedly installed inside the equipment room (12). The output shaft of the low-speed motor (31) is fixedly connected to a first gear (32). The first gear (32) meshes with a second gear (33). The upper end of the second gear (33) is fixedly connected to a first pulley (34). The first pulley (34) is rotatably connected to the inner wall of the equipment room (12). The first pulley (34) is connected to a second pulley (35) via a belt drive. The second pulley (35) is fixed to the bottom end of the first turntable (21) via a cylinder.

6. The microwave extraction device for rapeseed oil extraction according to claim 5, characterized in that, A third pulley (36) is fixedly installed at the bottom end of the first gear (32). The third pulley (36) is connected to a fourth pulley (37) via a belt drive. The fourth pulley (37) passes through the first turntable (21) via a round rod and is fixedly connected to the bottom end of the second turntable (22).

7. The microwave extraction device for rapeseed oil extraction according to claim 1, characterized in that, The solvent recovery mechanism (4) includes a gas supply pipe (41) fixedly connected to the upper end of the outer cover (24). The gas supply pipe (41) is sleeved on the guide pipe (42). A cooler (43) is provided at the upper end of the guide pipe (42). A first return pipe (44) is fixedly connected to one side of the guide pipe (42). The bottom end of the first return pipe (44) is inserted into the liquid collection tank (45). The liquid collection tank (45) is fixedly installed on the side of the box body (1).

8. A microwave extraction device for rapeseed oil extraction according to claim 7, characterized in that, The bottom end of the outer bottle (23) of the container is fixedly connected to a drain pipe (46), and a shut-off valve (461) is provided on the drain pipe (46). The bottom end of the drain pipe (46) is inserted into the interface at the upper end of the second return pipe (47), and the bottom end of the second return pipe (47) is inserted into the liquid collection tank (45).

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