Curcumin extraction device and extraction method

Abstract

The invention discloses a curcumin extraction device and an extraction method, and belongs to the field of curcumin extraction. The device comprises a barrel, a partition plate is fixedly connected to the middle of the barrel and divides the barrel into a stirring barrel and a distillation barrel, the distillation barrel is communicated with a condensation pipe, a gear is fixedly connected to a valve rod of a return valve, and when the gear rotates, the condensation pipe can be communicated with a collecting barrel or a return pipe; when a solution in the distillation cylinder boils, the second water injection pipe injects low-temperature cooling water into the first water injection pipe, so that the pressure in the box is controlled to be increased, the gear rotates, the condensation pipe is communicated with the return pipe, and the method comprises the steps of stirring extraction, filtering transfer, vacuum distillation and boil regulation and control; according to the invention, when a solution is exploded and boiled, the reflux valve is reversed to enable the condensation pipe to be communicated with the reflux pipe, so that when the solution is exploded and boiled, curcumin wrapped in steam can flow back into the distillation cylinder through the reflux pipe after being condensed, and the loss of curcumin is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of curcumin extraction, in particular to a curcumin extraction device and an extraction method. Background Art

[0002] In the field of curcumin extraction, solvent extraction has become the mainstream process due to its simple operation and strong applicability. This method first uses the solubility of curcumin in organic solvents to extract it from the turmeric raw material, and then separates the solvent and curcumin through distillation. However, there are many problems that need to be solved in the actual operation of traditional extraction devices.

[0003] On the one hand, the solution frequently boils during the distillation process. Once the solution boils, a large amount of curcumin will enter the condensation system along with the solvent vapor and eventually be collected in the solvent collection device. This will not only cause serious loss of curcumin and reduce the extraction efficiency, but also dilute the collected solvent, increasing the difficulty and cost of subsequent purification. Traditional devices usually lack effective monitoring and response mechanisms for boiling situations, and cannot prevent curcumin from being lost with the steam in time. Summary of the invention

[0004] The object of the present invention is to provide a curcumin extraction device and an extraction method, which solve the problem that curcumin is easily entrained and discharged when the solution boils explosively.

[0005] To achieve the above object, the present invention provides the following technical solution: a curcumin extraction device, comprising a cylinder, a partition is fixedly connected to the middle of the cylinder, the partition divides the cylinder into a stirring cylinder and a distillation cylinder, the distillation cylinder is connected to a condenser, the condenser is connected to a collecting cylinder, a reflux pipe is connected between the condenser and the distillation cylinder, a reflux valve is provided on the condenser, a gear is fixedly connected to the valve stem of the reflux valve, and when the gear rotates, the condenser can be connected to the collecting cylinder or the reflux pipe; A condensing cylinder is sleeved on the condensing tube, and the condensing cylinder is connected to a water inlet pipe, and the end of the water inlet pipe is connected to a control box. A piston plate is slidably connected in the control box, and a tension spring is connected between one side of the piston plate and the control box, and the other side of the piston plate is connected to a rack meshing with the gear. The control box is also connected to a first water injection pipe, and the first water injection pipe is connected to a second water injection pipe. The first water injection pipe injects normal temperature cooling water into the condensing tube. When the solution in the distillation tube boils explosively, the second water injection pipe injects low-temperature cooling water into the first water injection pipe, thereby increasing the pressure in the control box to cause the gear to rotate. The condensing tube is connected to the reflux pipe.

[0006] Preferably, the reflux valve also includes a spherical valve shell, which is connected to the condenser and the reflux pipe. A spherical valve core is rotatably connected inside the spherical valve shell, and the valve stem is fixedly connected to the spherical valve core. A T-shaped hole is provided in the middle of the spherical valve core. When the spherical valve core rotates, the T-shaped hole can be connected to the collecting cylinder or the reflux pipe.

[0007] Preferably, the collecting cylinder is connected to a vacuum pipe, and a one-way valve is provided on the vacuum pipe.

[0008] Preferably, a circular plate is slidably connected inside the distillation cylinder, and the circular plate is fitted with the inner wall of the distillation cylinder. A hydraulic rod is fixedly connected to the bottom wall of the distillation cylinder, and the output end of the hydraulic rod is fixedly connected to the lower surface of the circular plate. When the hydraulic rod is extended, it can drive the circular plate to move upward, thereby reducing the distillation space of the distillation cylinder, so that the negative pressure of the distillation cylinder is reduced and the boiling of the solution is alleviated.

[0009] Preferably, a slide is fixedly connected to the upper part of the circular plate in the distillation cylinder, a detection rod is vertically slidably connected to the slide, a hollow ball is fixedly connected to the bottom of the detection rod, the hollow ball floats in the solution, and a displacement sensor is provided on the slide. When the solution boils, the height difference between the hollow ball and the surface of the solution increases, thereby increasing the stroke of the vertical reciprocating sliding of the detection rod on the slide. At this time, the hydraulic rod is extended. When the hydraulic rod is extended, the second water injection pipe injects low-temperature cooling water into the first water injection pipe.

[0010] Preferably, a stirring rod is rotatably connected inside the stirring drum, a motor is vertically slidably connected to the top of the stirring drum, a filter is vertically slidably connected to the bottom of the stirring drum, a conical plug is fixedly connected to the lower surface of the filter, a conical hole matching the conical plug is provided on the partition, and the filter can be driven to move up when the motor moves downward, thereby moving the conical plug upward to connect the stirring drum with the distillation cylinder.

[0011] Preferably, the bottom end of the stirring rod is rotatably connected to a threaded rod by magnetic adsorption, and the upper surface of the filter is symmetrically slidably connected to two rectangular blocks. Threaded grooves cooperating with the threaded rod are provided on the opposite surfaces of the two rectangular blocks, and wedge blocks are fixedly connected to the tops of the two rectangular blocks. The bottom end of the stirring rod is slidably connected to an inner conical ring via a spring key, and the inner conical ring can push the two wedge blocks closer to each other as the stirring rod moves downward, so that the threaded grooves on the inner walls of the two rectangular blocks are embedded in the threaded rod.

[0012] Preferably, two vertical plates are fixedly connected to the upper surface of the filter screen, and a return spring is fixedly connected between the two vertical plates and the two rectangular blocks; A limiting block is fixedly connected to the side wall of the filter screen, a sliding groove cooperating with the limiting block is opened on the inner wall of the mixing drum, and an air spring is connected between the top wall of the sliding groove and the limiting block.

[0013] Preferably, a dredging rod is fixedly connected to the side wall of the inner cone ring, and after the stirring rod and the filter screen are close to each other, the dredging rod can fit against the upper surface of the filter screen.

[0014] A curcumin extraction method, applied to a curcumin extraction device, comprises the following steps: Add the crushed raw materials and solvent into the mixing drum, start the motor to make the stirring rod stir the raw materials, and heat the mixing drum at the same time, so that the curcumin in the raw materials is dissolved in the solvent; After the stirring and extraction is completed, the motor is controlled to move downward, and the stirring rod moves downward, so that the spring of the stirring rod is transmitted to the inner cone ring. At this time, the inner cone ring pushes the two wedges to approach each other, so that the two rectangular blocks approach each other, so that the threaded rod can drive the filter to move upward when rotating with the stirring rod. When the filter moves upward, the wedge pushes the inner cone ring to overcome the elastic force of the spring and slide up on the stirring rod. At this time, the dredging rod contacts the filter to scrape the filter, and the conical plug moves upward, so that the solvent for extracting curcumin flows into the distillation cylinder; After the solvent for extracting curcumin flows into the distillation cylinder, the motor is controlled to reverse, so that the filter screen moves downward, so that the conical plug seals the conical hole of the partition, so that the distillation cylinder is closed, and the collection cylinder and the distillation cylinder are evacuated through the vacuum tube to heat the distillation cylinder, so that the temperature of the distillation cylinder slowly rises to the maximum temperature required for extraction; After the solvent evaporates, it is condensed through the condenser tube and then collected in the collection cylinder. When the solution in the distillation cylinder boils, the boiling solution pushes the hollow ball to increase its floating stroke, thereby increasing the vertical sliding stroke of the detection rod on the slide seat. The displacement sensor on the slide seat obtains the vertical sliding stroke data of the detection rod and transmits the data to the control system. The control system controls the hydraulic rod to extend, so that the circular plate moves up, thereby reducing the total volume of the distillation cylinder and the collection cylinder. At this time, the negative pressure in the distillation cylinder is reduced, thereby alleviating the boiling of the solution in the distillation cylinder. The control system controls the extension of the hydraulic rod and controls the injection of low-temperature cooling water into the first water injection pipe through the second water injection pipe at a fixed time and quantity. At this time, the flow rate of cold water increases, the condensation speed of steam in the condenser pipe increases, and the pressure in the control box increases. At this time, the piston plate slides to make the rack drive the gear to rotate, so that the condensate containing curcumin due to explosive boiling flows back into the distillation cylinder through the condenser pipe and the reflux pipe; When the second water injection pipe no longer injects cold water into the first water injection pipe, the pressure in the control box drops, and the tension spring pulls the piston plate to reset, so that the condenser pipe resumes the connection with the collection cylinder and continues to collect the condensed solvent; If the vertical sliding stroke of the detection rod is low, the control system controls the hydraulic rod to shorten to increase the vacuum degree in the distillation cylinder.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When cooling water is injected into the second water injection pipe of the present invention, the amount of cooling water injected into the space between the piston plate and the control box in the control box through the first water injection pipe increases, thereby increasing the pressure in the control box. At this time, the pressure pushes the piston plate to overcome the tension of the tension spring to slide, thereby the piston plate drives the rack to slide, the rack slides and drives the gear to rotate, thereby causing the reflux valve to switch to connect the condenser and the reflux pipe, so that when the solution boils, the curcumin entrained in the steam can flow back into the distillation cylinder through the reflux pipe after condensation, thereby reducing the loss of curcumin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the cylinder of the present invention; Figure 3 It is a structural schematic diagram of the threaded rod of the present invention; Figure 4 It is a structural schematic diagram of the hollow ball of the present invention; Figure 5 It is a structural schematic diagram of the collecting tube of the present invention; Figure 6 It is a structural schematic diagram of the control box of the present invention.

[0017] In the figure: 100, cylinder; 110, partition; 120, mixing cylinder; 130, motor; 131, base; 132, electric telescopic rod; 140, stirring rod; 150, inner cone ring; 151, dredging rod; 160, threaded rod; 170, filter screen; 171, vertical plate; 172, rectangular block; 173, return spring; 174, wedge block; 175, tapered plug; 180, air spring; 181, limit block; 190, electric heating wire; 200, distillation cylinder; 210, round plate; 211, discharge pipe; 212 ...12, distillation cylinder; 213, round plate; 214, discharge pipe; 215, filter screen; 171, vertical plate; 172, rectangular block; 173, return spring; 174, wedge block; 175, tapered plug; 180, air spring; 181, limit block; 190, electric heating wire; 216, distillation cylinder; 217, round plate; 218, discharge pipe; 219, filter screen; 220, filter screen; 221 2. Solenoid valve; 220. Hydraulic rod; 230. Sliding seat; 240. Detection rod; 250. Hollow ball; 300. Collecting tube; 310. Condenser tube; 320. Spherical valve housing; 321. Spherical valve core; 322. T-shaped hole; 323. Valve stem; 324. Gear; 330. Condenser tube; 340. Water inlet pipe; 350. Control box; 351. Piston plate; 352. Rack; 353. Tension spring; 360. First water injection pipe; 370. Second water injection pipe; 380. Reflux pipe; 390. Vacuum tube. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Reference Figure 1-Figure 6 The present embodiment provides a technical solution: a curcumin extraction device, comprising a cylinder 100, a partition 110 is fixedly connected to the middle of the cylinder 100, the partition 110 divides the cylinder 100 into a stirring cylinder 120 and a distillation cylinder 200, a condenser 310 is connected to the distillation cylinder 200, the condenser 310 is connected to the collecting cylinder 300, a reflux pipe 380 is connected between the condenser 310 and the distillation cylinder 200, a reflux valve is provided on the condenser 310, a gear 324 is fixedly connected to the valve stem 323 of the reflux valve, and when the gear 324 rotates, the condenser 310 can be connected to the collecting cylinder 300 or the reflux pipe 380; a condenser 330 is sleeved on the condenser 310, and the condenser 330 is connected to the water inlet pipe 34 0, the end of the water inlet pipe 340 is connected to the control box 350, and a piston plate 351 is slidably connected in the control box 350. A tension spring 353 is connected between one side of the piston plate 351 and the control box 350, and the other side of the piston plate 351 is connected to a rack 352 meshing with the gear 324. The control box 350 is also connected to a first water injection pipe 360, and the first water injection pipe 360 ​​is connected to a second water injection pipe 370. The first water injection pipe 360 ​​injects room temperature cooling water into the condensing cylinder 330. When the solution in the distillation cylinder 200 boils explosively, the second water injection pipe 370 injects low-temperature cooling water into the first water injection pipe 360, thereby increasing the pressure in the control box 350 to cause the gear 324 to rotate, and the condensing pipe 310 is connected to the reflux pipe 380.

[0020] The barrel 100 is connected to a feeding pipe (not shown in the figure) connected to the stirring barrel 120. The raw materials such as turmeric used to extract curcumin and crushed are added to the stirring barrel 120 through the feeding pipe, and then solvents such as ethanol are added. The stirring barrel 120 and the barrel wall of the distillation barrel 200 are both provided with electric heating wires 190. The electric heating wires 190 are started to provide heat for the extraction of curcumin and subsequent distillation. After the curcumin and the solvent are stirred for a period of time by the stirring barrel 120, the curcumin is dissolved in the solvent. At this time, the solution containing the dissolved curcumin is discharged into the distillation barrel 200. After the collecting cylinder 300 and the distilling cylinder 200 are evacuated, the electric heating wire 190 disposed in the cylinder wall of the distilling cylinder 200 is started to heat the solution. The vacuum degree of the collecting cylinder 300 and the distilling cylinder 200 is not an absolute vacuum. The heating power of the electric heating wire 190 is gradually increased until it is constant, so that the solution is gradually heated. After the power of the electric heating wire 190 is constant, the temperature of the solution is maintained at the highest. The heating temperature here can be set at fifty degrees. During the heating process of the solution, the solution gradually boils, so that the solvent evaporates and separates from the solution. The solvent vapor (hereinafter referred to as vapor) passes through the condenser 310 and condenses into droplets to be collected by the collecting tube 300. During the distillation process, if the solution boils, the second water injection pipe 370 injects cooling water with a lower temperature into the first water injection pipe 360, otherwise it does not inject; The inner cavity of the partition 110 is triangular in cross section, and the vertex of the triangle is located at the upper part. The end of the condenser tube 310 is connected to the vertex of the triangle, so that the steam gathered at the vertex of the triangle can enter the condenser tube 310. When cooling water is injected into the second water injection pipe 370, the amount of cooling water injected into the space between the piston plate 351 and the control box 350 in the control box 350 through the first water injection pipe 360 ​​increases, thereby increasing the pressure in the control box 350. At this time, the pressure pushes the piston plate 351 to overcome the tension of the tension spring 353 to slide, so that the piston plate 351 drives the rack 352 to slide, and the rack 352 slides and drives the gear 324 to rotate, so that the reflux valve is switched to make the condenser 310 connected to the reflux pipe 380, so that when the solution boils, the curcumin entrained in the steam can be condensed and flow back into the distillation cylinder 200 through the reflux pipe 380, thereby reducing the loss of curcumin; The connection point between the reflux pipe 380 and the reflux valve is higher than the connection point between the reflux pipe 380 and the distillation cylinder 200, thereby ensuring that the condensate can be stably refluxed into the distillation cylinder 200 under the influence of gravity; Since a large amount of solvent is used when extracting curcumin, the reflux pipe 380 is provided to recover the condensate containing curcumin, which makes the structure required for the reflux of the condensate more compact and more stable than controlling the inclination of the condenser pipe 310.

[0021] The reflux valve also includes a spherical valve shell 320, which is connected to the condenser 310 and the reflux pipe 380. A spherical valve core 321 is rotatably connected inside the spherical valve shell 320, and a valve stem 323 is fixedly connected to the spherical valve core 321. A T-shaped hole 322 is opened in the middle of the spherical valve core 321. When the spherical valve core 321 rotates, the T-shaped hole 322 can be connected to the collecting tube 300 or the reflux pipe 380.

[0022] The valve stem 323 is perpendicular to the axes of the horizontal and vertical sections of the T-shaped hole 322. When the gear 324 rotates, it can drive the spherical valve core 321 to rotate synchronously, so that the connection state of the T-shaped hole 322 changes. When the solution boils, the spherical valve core 321 rotates in the direction of the reflux pipe 380 to connect the condenser 310 with the reflux pipe 380, and interrupts the connection between the condenser 310 and the collecting tube 300. After a period of time after the boiling stabilizes, the spherical valve core 321 rotates in the opposite direction and resets, so that the condenser 310 is connected to the collecting tube 300, and interrupts the connection between the condenser 310 and the reflux pipe 380. At this time, the condenser 310 continues to discharge the condensed solvent into the collecting tube 300.

[0023] The collecting tube 300 is connected to a vacuum tube 390 , and a one-way valve is provided on the vacuum tube 390 .

[0024] The vacuum tube 390 is connected to an external vacuum pump. The external vacuum pump stops running after the collecting cylinder 300 and the distillation cylinder 200 reach the required vacuum degree. The one-way valve on the vacuum tube 390 can prevent the distillation cylinder 200 and the collecting cylinder 300 from depressurizing.

[0025] A circular plate 210 is slidably connected inside the distillation cylinder 200, and the circular plate 210 is fitted against the inner wall of the distillation cylinder 200. A hydraulic rod 220 is fixedly connected to the bottom wall of the distillation cylinder 200, and the output end of the hydraulic rod 220 is fixedly connected to the lower surface of the circular plate 210. When the hydraulic rod 220 is extended, the circular plate 210 can be driven to move upward, thereby reducing the distillation space of the distillation cylinder 200, so that the negative pressure of the distillation cylinder 200 is reduced and the boiling of the solution is alleviated.

[0026] The space between the circular plate 210 and the top wall of the distillation cylinder 200 remains relatively closed during distillation and is only connected to the collecting cylinder 300, so that the vacuum degree of the distillation cylinder 200 can be adjusted when the circular plate 210 moves up and down. When the solution boils, the hydraulic rod 220 extends to drive the circular plate 210 to move upward. At this time, the space in the distillation cylinder 200 is reduced, so that the vacuum degree in the distillation cylinder 200 is reduced. At this time, the boiling state of the solution can be alleviated, thereby preventing steam from entraining curcumin into the condenser 310. If it is not close to the end of the distillation and the boiling degree of the solution is low when the electric heating wire reaches the maximum power, the hydraulic rod 220 is shortened, causing the circular plate 210 to move downward, thereby increasing the vacuum degree of the distillation cylinder 200 and promoting the boiling of the solution.

[0027] A slide 230 is fixedly connected to the upper part of the circular plate 210 in the distillation cylinder 200, and a detection rod 240 is vertically slidably connected to the slide 230. A hollow ball 250 is fixedly connected to the bottom of the detection rod 240. The hollow ball 250 floats in the solution, and a displacement sensor is provided on the slide 230. When the solution boils, the height difference of the hollow ball 250 above the surface of the solution increases, thereby increasing the stroke of the vertical reciprocating sliding of the detection rod 240 on the slide 230. At this time, the hydraulic rod 220 extends. When the hydraulic rod 220 extends, the second water injection pipe 370 injects low-temperature cooling water into the first water injection pipe 360.

[0028] The hollow ball 250 floats on the surface of the solution in the distillation cylinder 200. When the solution boils, the fluctuation of the liquid level of the solution can push the hollow ball 250 to move up and down, and the higher the boiling degree, the higher the amplitude of pushing the hollow ball 250 up and down, thereby making the detection rod 240 fixedly connected to the hollow ball 250 slide vertically larger. A displacement sensor is arranged in the slide seat 230 to detect the sliding stroke of the detection rod 240. If the sliding stroke of the detection rod 240 is high, it means that the solution boils violently, otherwise the solution boils not violently. The displacement sensor obtains the stroke signal of the detection rod 240 and transmits it to the control system. When the sliding stroke of the detection rod 240 is large, the hydraulic rod 220 is extended, otherwise the hydraulic rod 220 is shortened, and the relationship between the telescopic distance of the hydraulic rod 220 and the sliding stroke of the detection rod 240 is determined by the algorithm of the interpolation function, and the sliding stroke of the detection rod 240 corresponds to the telescopic distance of the hydraulic rod 220. In addition, when the control system controls the hydraulic rod 220 to extend, it also controls the second water injection pipe 370 to inject cooling water into the first water injection pipe 360. Specifically, water pumps are connected to the first water injection pipe 360 ​​and the second water injection pipe 370. The first water injection pipe 360 ​​is connected to the normal temperature cooling water, and the second water injection pipe 370 is connected to the low temperature cooling water. When the solution in the distillation cylinder 200 is distilled, the water pump connected to the first water injection pipe 360 ​​is in operation. When the hydraulic rod 220 is extended, the water pump connected to the second water injection pipe 370 is operated, and the operation time of the water pump of the second water injection pipe 370 is short. The specific operation time can be determined by the time required for the liquid condensed from the steam generated after the explosion and stabilization to flow back into the distillation cylinder 200 during actual use. When the water pump connected to the second water injection pipe 370 stops running, the pressure in the control box 350 decreases, and the tension spring 353 pulls the piston plate 351 to reset, so that the spherical valve core 321 rotates in the opposite direction, so that the condenser tube 310 is connected with the collection tube 300 again, ensuring that the collection tube 300 can continue to collect the condensed solvent after the solution explosion is relieved; A distance sensor is arranged at the bottom of the hollow ball 250. When the distance sensor detects that the distance between the hollow ball 250 and the circular plate 210 changes from the maximum to one-fourth or one-fifth of the maximum value, the power of the electric heating wire 190 in the wall of the distillation cylinder 200 is reduced so that the temperature is between 20 and 30 degrees, and the solution is continued to be distilled to remove as much residual solvent as possible.

[0029] A stirring rod 140 is rotatably connected inside the stirring drum 120, a motor 130 is vertically slidably connected to the top of the stirring drum 120, a filter screen 170 is vertically slidably connected to the bottom of the stirring drum 120, a conical plug 175 is fixedly connected to the lower surface of the filter screen 170, and a conical hole matching the conical plug 175 is provided on the partition 110. When the motor 130 moves downward, it can drive the filter screen 170 to move upward, thereby moving the conical plug 175 upward, so that the stirring drum 120 is connected to the distillation drum 200.

[0030] The top of the mixing drum 120 is fixedly connected to the base 131 through an electric telescopic rod 132, the motor 130 is fixedly connected to the base 131, and the top of the mixing drum 120 is connected to a limit frame for placing the base 131 to rotate, and a groove that cooperates with the limit frame is opened on the base 131. After the raw materials and the solvent are stirred, the electric telescopic rod 132 is controlled to shorten. At this time, the base 131 drives the motor 130 to move downward, so that the stirring rod 140 connected to the motor 130 moves downward. When the stirring rod 140 moves downward, the filter screen 170 can be driven to move upward, so that a gap appears between the filter screen 170 and the bottom wall of the mixing drum 120. At the same time, the conical plug 175 connected to the bottom of the filter screen 170 is pulled out of the conical hole on the partition 110. At this time, the solvent for extracting curcumin from the mixed liquid in the mixing drum 120 can pass through the conical holes on the filter screen 170 and the partition 110 into the distillation drum 200 for subsequent distillation and separation.

[0031] The bottom end of the stirring rod 140 is magnetically adsorbed and rotatably connected to the threaded rod 160, and the upper surface of the filter screen 170 is symmetrically slidably connected to two rectangular blocks 172. The opposite surfaces of the two rectangular blocks 172 are provided with threaded grooves that cooperate with the threaded rod 160. The tops of the two rectangular blocks 172 are fixedly connected to wedge blocks 174. The bottom end of the stirring rod 140 is slidably connected to the inner cone ring 150 through a spring (not shown in the figure). When the inner cone ring 150 moves downward with the stirring rod 140, it can push the two wedge blocks 174 closer to each other, so that the threaded grooves on the inner walls of the two rectangular blocks 172 are embedded in the threaded rod 160.

[0032] A pin-like structure may be provided at the top of the threaded rod 160, and a groove cooperating with the pin is provided at the bottom end of the stirring rod 140 to ensure that the threaded rod 160 will not be separated from the stirring rod 140. The threaded rod 160 and the bottom end of the stirring rod 140 are magnetically attracted to each other, so that when the rotation load of the threaded rod 160 is low, the stirring rod 140 can drive the threaded rod 160 to rotate. If the rotation load of the threaded rod 160 is high, the stirring rod 140 can rotate relative to the threaded rod 160, thereby preventing the rotation of the stirring rod 140 from being interfered with. The top of the spring is fixedly connected to the stirring rod 140, and the bottom of the spring is fixedly connected to the top of the inner cone ring 150. When the stirring rod 140 moves downward, it can be transmitted to the inner cone ring 150 through the spring, so that the inner cone ring 150 moves downward. At this time, the inner cone ring 150 pushes the two wedge blocks 174 to approach each other, so that the two rectangular blocks 172 are synchronously approached, so that the thread grooves on the inner walls of the two rectangular blocks 172 are both embedded in the threaded rod 160. At this time, the threaded rod 160 rotates synchronously with the stirring rod 140 to drive the two rectangular blocks 172 The filter screen 170 is driven to move upward, and after the two rectangular blocks 172 contact each other, the clearing rod 151 fits against the filter screen 170. When the filter screen 170 moves upward, the two rectangular blocks 172 push the inner cone ring 150 to overcome the elastic force of the spring and slide upward, ensuring that the upward movement of the filter screen 170 is not interfered with. At the same time, the clearing rod 151 keeps in contact with the filter screen 170, and after the threaded rod 160 rotates until its bottom end contacts the filter screen 170, the threaded rod 160 no longer rotates, and at this time the stirring rod 140 can rotate relative to the threaded rod 160.

[0033] Two vertical plates 171 are fixedly connected to the upper surface of the filter 170, and a return spring 173 is fixedly connected between the two vertical plates 171 and the two rectangular blocks 172; a limit block 181 is fixedly connected to the side wall of the filter 170, and a slide groove cooperating with the limit block 181 is opened on the inner wall of the mixing drum 120, and an air spring 180 is connected between the top wall of the slide groove and the limit block 181.

[0034] After the threaded rod 160 stops rotating, the air spring 180 is not in a fully compressed state. When the solution is discharged, the electric telescopic rod 132 is controlled to extend so that the stirring rod 140 moves upward, and the motor 130 is controlled to reverse. At this time, the downward pressure applied by the spring to the inner cone ring 150 is reduced, and the return spring 173 pulls the two rectangular blocks 172 so that the two have a tendency to separate. In the initial stage of the upward movement of the threaded rod 160, the thread groove on the rectangular block 172 drives the filter screen 170 to continue to move upward, so that the air spring 180 is further compressed. As the threaded rod 160 continues to move upward and the threaded rod 160 driven by the motor 130 reverses, the reset spring 173 can finally pull the two rectangular blocks 172 to reset. At this time, the air spring 180 drives the filter 170 to reset, so that the conical plug 175 blocks the conical hole on the partition 110 to ensure that the steam in the distillation cylinder 200 does not enter the mixing cylinder 120, and when negative pressure appears in the distillation cylinder 200, the air pressure can make the conical plug 175 more firmly block the conical hole on the partition 110.

[0035] A dredging rod 151 is fixedly connected to the side wall of the inner cone ring 150 . When the stirring rod 140 and the filter screen 170 are brought close to each other, the dredging rod 151 can fit against the upper surface of the filter screen 170 .

[0036] The inner cone ring 150 is slidably connected to the stirring rod 140, so that when the stirring rod 140 rotates, the inner cone ring 150 can be driven to rotate, so that the dredging rod 151 scrapes the filter screen 170 to ensure the permeability of the filter screen 170, so that the solution can flow smoothly in the distillation cylinder 200; A fixing ring can be set on the periphery of the filter 170, and a solid support plate can be set in the middle of the fixing ring. The new support plate and the fixing ring are fixedly connected by a metal rod to ensure that the threaded rod 160 will not pierce the filter 170, and at the same time ensure that the edge of the filter 170 will not be damaged by friction when moving up and down.

[0037] A curcumin extraction method, applied to a curcumin extraction device, comprises the following steps: The crushed raw materials and the solvent are added into the mixing drum 120, and the motor 130 is started to make the mixing rod 140 stir the raw materials, and the mixing drum 120 is heated at the same time, so that the curcumin in the raw materials is dissolved in the solvent; After the stirring and extraction is completed, the motor 130 is controlled to move downward, and the stirring rod 140 is moved downward, so that the spring of the stirring rod 140 is transmitted to the inner cone ring 150, and the inner cone ring 150 pushes the two wedges 174 to approach each other, so that the two rectangular blocks 172 are close to each other, so that the threaded rod 160 can drive the filter screen 170 to move upward when rotating with the stirring rod 140. When the filter screen 170 moves upward, the wedge 174 pushes the inner cone ring 150 to overcome the elastic force of the spring and slide up on the stirring rod 140. At this time, the dredging rod 151 contacts the filter screen 170 to scrape the filter screen 170, and the conical plug 175 moves upward, so that the solvent for extracting curcumin flows into the distillation cylinder 200; After the solvent for extracting curcumin flows into the distillation cylinder 200, the motor 130 is controlled to reverse, so that the filter screen 170 moves downward, so that the conical plug 175 blocks the conical hole of the partition 110, so that the distillation cylinder 200 is closed, and the collection cylinder 300 and the distillation cylinder 200 are evacuated through the vacuum tube 390 and then heated, so that the temperature of the distillation cylinder 200 slowly rises to the maximum temperature required for extraction; After the solvent evaporates, it is condensed through the condenser 310 and then collected in the collecting cylinder 300. When the solution in the distillation cylinder 200 boils, the boiling solution pushes the hollow ball 250 to increase its floating stroke, thereby increasing the stroke of the detection rod 240 vertically sliding on the slide 230. The displacement sensor on the slide 230 obtains the vertical sliding stroke data of the detection rod 240 and transmits the data to the control system. The control system controls the hydraulic rod 220 to extend, so that the circular plate 210 moves up, thereby reducing the total volume of the distillation cylinder 200 and the collecting cylinder 300. At this time, the negative pressure in the distillation cylinder 200 is reduced, thereby alleviating the boiling of the solution in the distillation cylinder 200. While the control system controls the hydraulic rod 220 to extend, it also controls the low-temperature cooling water to be injected into the first water injection pipe 360 ​​through the second water injection pipe 370 in a timely and quantitative manner. At this time, the flow rate of the cold water increases, the steam condensation speed in the condenser pipe 310 increases, and the pressure in the control box 350 increases. At this time, the piston plate 351 slides to make the rack 352 drive the gear 324 to rotate, so that the condensate containing curcumin due to the explosive boiling flows back into the distillation cylinder 200 through the condenser pipe 310 and the reflux pipe 380; When the second water injection pipe 370 no longer injects cold water into the first water injection pipe 360, the pressure in the control box 350 decreases, and the tension spring 353 pulls the piston plate 351 to reset, so that the condenser 310 resumes the connection state with the collection cylinder 300 and continues to collect the condensed solvent; If the vertical sliding stroke of the detection rod 240 is low, the control system controls the hydraulic rod 220 to shorten so as to increase the vacuum degree in the distillation cylinder 200 .

[0038] The upper surface of the circular plate 210 is a cone, and a discharge pipe 211 connected to the distillation cylinder 200 is connected to the lowest point of the cone. A solenoid valve 212 is provided on the discharge pipe 211. After the distillation is completed, the solenoid valve 212 is opened to discharge the curcumin remaining in the distillation cylinder 200.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A curcumin extraction device, comprising a cylinder (100), characterized in that: A partition (110) is fixedly connected to the middle of the cylinder (100), the partition (110) divides the cylinder (100) into a stirring cylinder (120) and a distillation cylinder (200), the distillation cylinder (200) is connected to a condenser (310), the condenser (310) is connected to a collecting cylinder (300), a reflux pipe (380) is connected between the condenser (310) and the distillation cylinder (200), a reflux valve is provided on the condenser (310), a gear (324) is fixedly connected to the valve stem (323) of the reflux valve, and when the gear (324) rotates, the condenser (310) can be connected to the collecting cylinder (300) or the reflux pipe (380); The condensing tube (310) is sleeved with a condensing cylinder (330), the condensing cylinder (330) is connected to a water inlet pipe (340), the end of the water inlet pipe (340) is connected to a control box (350), a piston plate (351) is slidably connected inside the control box (350), a tension spring (353) is connected between one side of the piston plate (351) and the control box (350), the other side of the piston plate (351) is connected to a rack (352) meshing with the gear (324), and the control box (350) is provided with a plurality of gears (352) meshing with the gears (324). A first water injection pipe (360) is also connected, and a second water injection pipe (370) is connected to the first water injection pipe (360). The first water injection pipe (360) injects room temperature cooling water into the condensation cylinder (330). When the solution in the distillation cylinder (200) boils, the second water injection pipe (370) injects low temperature cooling water into the first water injection pipe (360), thereby increasing the pressure in the control box (350) to rotate the gear (324). The condensation pipe (310) is connected to the reflux pipe (380).

2. The curcumin extraction device according to claim 1, wherein: The reflux valve also includes a spherical valve shell (320), the spherical valve shell (320) is connected to the condenser (310) and the reflux pipe (380), a spherical valve core (321) is rotatably connected inside the spherical valve shell (320), the valve stem (323) is fixedly connected to the spherical valve core (321), a T-shaped hole (322) is opened in the middle of the spherical valve core (321), and when the spherical valve core (321) rotates, the T-shaped hole (322) can be connected to the collecting tube (300) or the reflux pipe (380).

3. The curcumin extraction device according to claim 2, characterized in that: The collecting cylinder (300) is connected to a vacuum pumping tube (390), and a one-way valve is provided on the vacuum pumping tube (390).

4. The curcumin extraction device according to claim 3, characterized in that: A circular plate (210) is slidably connected inside the distillation cylinder (200), and the circular plate (210) is in contact with the inner wall of the distillation cylinder (200). A hydraulic rod (220) is fixedly connected to the bottom wall of the distillation cylinder (200), and the output end of the hydraulic rod (220) is fixedly connected to the lower surface of the circular plate (210). When the hydraulic rod (220) is extended, it can drive the circular plate (210) to move upward, thereby reducing the distillation space of the distillation cylinder (200), so that the negative pressure of the distillation cylinder (200) is reduced and the boiling of the solution is alleviated.

5. The curcumin extraction device according to claim 4, characterized in that: A slide seat (230) is fixedly connected to the upper part of the circular plate (210) in the distillation cylinder (200), a detection rod (240) is vertically slidably connected to the slide seat (230), a hollow ball (250) is fixedly connected to the bottom of the detection rod (240), the hollow ball (250) floats in the solution, and a displacement sensor is arranged on the slide seat (230). When the solution boils, the height difference between the hollow ball (250) and the surface of the solution increases, thereby increasing the stroke of the detection rod (240) sliding back and forth vertically on the slide seat (230). At this time, the hydraulic rod (220) is extended. When the hydraulic rod (220) is extended, the second water injection pipe (370) injects low-temperature cooling water into the first water injection pipe (360).

6. The curcumin extraction device according to claim 5, characterized in that: A stirring rod (140) is rotatably connected inside the stirring drum (120), a motor (130) is vertically slidably connected to the top of the stirring drum (120), a filter screen (170) is vertically slidably connected to the bottom of the stirring drum (120), a conical plug (175) is fixedly connected to the lower surface of the filter screen (170), a conical hole matching the conical plug (175) is provided on the partition (110), and when the motor (130) moves downward, it can drive the filter screen (170) to move upward, thereby moving the conical plug (175) upward, so that the stirring drum (120) is connected to the distillation drum (200).

7. The curcumin extraction device according to claim 6, characterized in that: The bottom end of the stirring rod (140) is rotatably connected to a threaded rod (160) by magnetic adsorption, and the upper surface of the filter screen (170) is symmetrically slidably connected to two rectangular blocks (172). The opposite surfaces of the two rectangular blocks (172) are provided with threaded grooves that cooperate with the threaded rod (160), and the tops of the two rectangular blocks (172) are fixedly connected to wedge blocks (174). The bottom end of the stirring rod (140) is slidably connected to an inner cone ring (150) via a spring key. When the inner cone ring (150) moves downward with the stirring rod (140), it can push the two wedge blocks (174) to approach each other, so that the threaded grooves on the inner walls of the two rectangular blocks (172) are both embedded in the threaded rod (160).

8. The curcumin extraction device according to claim 7, characterized in that: Two vertical plates (171) are fixedly connected to the upper surface of the filter screen (170), and a return spring (173) is fixedly connected between the two vertical plates (171) and the two rectangular blocks (172); A limit block (181) is fixedly connected to the side wall of the filter screen (170), a slide groove cooperating with the limit block (181) is provided on the inner wall of the mixing drum (120), and an air spring (180) is connected between the top wall of the slide groove and the limit block (181).

9. The curcumin extraction device according to claim 8, characterized in that: A dredging rod (151) is fixedly connected to the side wall of the inner cone ring (150); after the stirring rod (140) and the filter screen (170) are brought close to each other, the dredging rod (151) can be attached to the upper surface of the filter screen (170).

10. A method for extracting curcumin, using the curcumin extraction device according to claim 9, characterized in that: The following steps are involved: Adding the crushed raw material and the solvent into a stirring drum (120), starting the motor (130) so that the stirring rod (140) stirs the raw material, and heating the stirring drum (120) so that the curcumin in the raw material dissolves in the solvent; After the stirring and extraction is completed, the motor (130) is controlled to move downward, and the stirring rod (140) is moved downward, so that the spring of the stirring rod (140) is transmitted to the inner cone ring (150), and the inner cone ring (150) pushes the two wedges (174) to approach each other, so that the two rectangular blocks (172) are approached to each other, so that the threaded rod (160) can drive the filter screen (170) to move upward when rotating with the stirring rod (140). When the filter screen (170) moves upward, the wedge (174) pushes the inner cone ring (150) to overcome the elastic force of the spring and slide up on the stirring rod (140). At this time, the dredging rod (151) contacts the filter screen (170) to scrape the filter screen (170), and the conical plug (175) moves upward, so that the solvent for extracting curcumin flows into the distillation cylinder (200); After the solvent for extracting curcumin flows into the distillation cylinder (200), the motor (130) is controlled to rotate in reverse, so that the filter screen (170) moves downward, so that the conical plug (175) blocks the conical hole of the partition (110), so that the distillation cylinder (200) is closed, and the collection cylinder (300) and the distillation cylinder (200) are evacuated through the vacuum tube (390), and then the distillation cylinder (200) is heated, so that the temperature of the distillation cylinder (200) slowly rises to the maximum temperature required for extraction; After the solvent evaporates, it is condensed through the condenser (310) and then enters the collecting cylinder (300) for collection. When the solution in the distillation cylinder (200) boils, the boiling solution pushes the hollow ball (250) to increase its floating stroke, thereby increasing the stroke of the detection rod (240) sliding vertically on the slide seat (230). The displacement sensor on the slide seat (230) obtains the vertical sliding stroke data of the detection rod (240) and transmits the data to the control system. The control system controls the hydraulic rod (220) to extend, so that the circular plate (210) moves upward, thereby reducing the total volume of the distillation cylinder (200) and the collecting cylinder (300). At this time, the negative pressure in the distillation cylinder (200) is reduced, thereby alleviating the boiling of the solution in the distillation cylinder (200); The control system controls the hydraulic rod (220) to extend and controls low-temperature cooling water to be injected into the first water injection pipe (360) through the second water injection pipe (370) at a fixed time and in a fixed quantity. At this time, the flow rate of cold water increases, the steam condensation speed in the condenser pipe (310) increases, and the pressure in the control box (350) increases. At this time, the piston plate (351) slides to make the rack (352) drive the gear (324) to rotate, so that the condensate containing curcumin due to explosive boiling flows back into the distillation cylinder (200) through the condenser pipe (310) and the reflux pipe (380); When the second water injection pipe (370) no longer injects cold water into the first water injection pipe (360), the pressure in the control box (350) decreases, and the tension spring (353) pulls the piston plate (351) to reset, so that the condenser pipe (310) resumes the connection state with the collection cylinder (300) and continues to collect the condensed solvent; If the vertical sliding stroke of the detection rod (240) is low, the control system controls the hydraulic rod (220) to shorten so as to increase the vacuum degree in the distillation cylinder (200).

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