Preparation equipment of alfalfa total flavone extract

Abstract

This utility model discloses a preparation device for total flavonoid extract from alfalfa, comprising: a pulverizing device, a hot reflux extraction device, a distillation device, a centrifuge, an extraction device, a first waste liquid tank, a first conditioning device, a resin adsorption device, and a second waste liquid tank. The first inlet of the distillation device is connected to the outlet of the hot reflux extraction device; the outlet of the distillation device is connected to the inlet of the centrifuge; the outlet of the centrifuge is connected to the inlet of the extraction device; the inlet of the first waste liquid tank is connected to the outlet of the extraction device; the inlet of the first conditioning device is connected to the outlet of the extraction device; the inlet of the resin adsorption device is connected to the outlet of the first conditioning device; the outlet of the resin adsorption device is connected to the third inlet of the distillation device; and the inlet of the second waste liquid tank is connected to the outlet of the resin adsorption device. This utility model can extract total flavonoid compounds from alfalfa with high extraction efficiency and good purification effect.

Description

Technical Field

[0001] This utility model relates to the field of extract preparation equipment, and in particular to a preparation equipment for alfalfa total flavonoid extract. Background Technology

[0002] Alfalfa is widely distributed in my country, boasting high yields, strong adaptability, and extremely rich nutritional value. Primarily used as animal feed in livestock farming, it enjoys the reputation of "King of Forage" and is highly valued as a valuable natural plant resource. In traditional medicine, alfalfa is also used to treat bacterial dysentery, coughs due to lung heat, jaundice, and bladder stones. Flavonoids are the main active ingredients, but currently, there is no dedicated equipment for extracting total flavonoids from alfalfa. Utility Model Content

[0003] The purpose of this invention is to provide a preparation device for total flavonoid extract from alfalfa, which can extract total flavonoid compounds from alfalfa with high extraction efficiency and good purification effect.

[0004] To achieve the above and other related objectives, this utility model provides a preparation device for alfalfa total flavonoid extract, comprising: a pulverizing device, a hot reflux extraction device, a distillation device, a centrifuge, an extraction device, a first waste liquid tank, a first conditioning device, a resin adsorption device, and a second waste liquid tank. The discharge port of the pulverizing device is connected to the inlet of the first conveying device; the discharge port of the first conveying device is connected to the inlet of the hot reflux extraction device, and the inlet of the hot reflux extraction device is connected to the discharge port of the first storage tank via a pipe. The hot reflux extraction device is equipped with a filter plate, a first condenser at the top, and a heating device. The first inlet of the distillation device is connected to the discharge port of the hot reflux extraction device, and the second inlet of the distillation device is connected to the discharge port of the second storage tank via a pipe. The discharge port of the distillation device is connected to the inlets of a first conveying pump and a second conveying pump via pipes, and the outlet of the second conveying pump is connected to the discharge pipe. The condenser outlet of the distillation device is connected to a negative pressure device via a pipe. The inlet of the centrifuge is connected to... The centrifuge's outlet is connected to the outlet of the first conveying pump via a pipeline, and the centrifuge's outlet is connected to the inlet of the third conveying pump via a pipeline. The extraction device's inlet is connected to the outlet of the third conveying pump via a pipeline, and the top of the extraction device is connected to the outlet of the third storage tank via a first metering component. The first waste liquid tank's inlet is connected to the extraction device's outlet via a pipeline. The first conditioning device's inlet is connected to the extraction device's outlet via a pipeline, and the top of the first conditioning device is connected to the outlet of the fourth storage tank via a second metering component. The resin adsorption device's inlet is connected to the first conditioning device's outlet via a pipeline, and the top of the resin adsorption device is connected to the outlets of the fifth and sixth storage tanks via the third and fourth metering components, respectively. The resin adsorption device's outlet is connected to the inlet of the fourth conveying pump via a pipeline, and the fourth conveying pump's outlet is connected to the third inlet of the distillation device via a pipeline. The resin adsorption device is filled with macroporous resin. The second waste liquid tank's inlet is connected to the resin adsorption device's outlet via a pipeline.

[0005] In one example of the preparation equipment for the alfalfa total flavonoid extract of this utility model, the first conveying device is a screw conveyor.

[0006] In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the hot reflux extraction device includes a first tank, a first stirring assembly is provided on the first tank, the top of the first tank is connected to the inlet of the first condenser through a pipe, the heating device is provided on the outside of the first tank, a first valve is provided at the outlet of the first tank, and the first valve is connected to the first inlet of the distillation device.

[0007] In one example of the preparation equipment for the total flavonoid extract of alfalfa of this utility model, the distillation device is equipped with a second stirring component, the top of the distillation device is connected to the inlet of the second condenser through a pipe, and the outlet of the second condenser is connected to the negative pressure device through a pipe.

[0008] In one example of the preparation equipment for the total flavonoid extract of alfalfa of this utility model, a second valve is provided at the outlet of the distillation device, and the second valve is connected to the inlet of the first delivery pump and the inlet of the second delivery pump respectively through a first connecting pipe.

[0009] In one example of the preparation equipment for the total flavonoid extract of alfalfa of this utility model, the negative pressure device includes a solvent recovery tank and a vacuum pump assembly. The outlet of the second condenser is connected to the inlet of the solvent recovery tank through a pipe, and the vacuum pump assembly is connected to the top of the solvent recovery tank through a pipe.

[0010] In one example of the preparation equipment for the total flavonoid extract of alfalfa of this utility model, a third valve is provided at the outlet of the first storage tank, and a fourth valve is provided at the outlet of the second storage tank.

[0011] In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the extraction device is provided with a third stirring assembly, the first metering assembly includes a first pipeline assembly and a first metering pump, the two ends of the first pipeline assembly are respectively connected to the top of the extraction device and the outlet of the third storage tank, and the first metering pump is installed on the first pipeline assembly.

[0012] In one example of the preparation equipment for the alfalfa total flavonoid extract of this utility model, a fifth valve is provided at the outlet of the extraction device. The fifth valve is connected to the first waste liquid tank and the inlet of the first modulation device respectively through a second connecting pipe. A sixth valve is provided at the inlet of the first waste liquid tank, and a seventh valve and a first observation tube are provided at the inlet of the first modulation device.

[0013] In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the first modulation device is provided with a fourth stirring component, the second metering component includes a second pipeline component and a second metering pump, the two ends of the second pipeline component are respectively connected to the top of the first modulation device and the outlet of the fourth storage tank, the second metering pump is installed on the second pipeline component, and an eighth valve is provided at the outlet of the first modulation device.

[0014] In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the third metering component includes a third pipeline component and a third metering pump. The two ends of the third pipeline component are respectively connected to the top of the resin adsorption device and the outlet of the fifth storage tank. The third metering pump is disposed on the third pipeline component. The fourth metering component includes a fourth pipeline component and a fourth metering pump. The two ends of the fourth pipeline component are respectively connected to the top of the resin adsorption device and the outlet of the sixth storage tank. The fourth metering pump is disposed on the fourth pipeline component.

[0015] In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, a ninth valve is provided at the outlet of the resin adsorption device. The ninth valve is connected to the inlet of the fourth conveying pump and the inlet of the second waste liquid tank through a third connecting pipe. A tenth valve and a second observation tube are provided at the inlet of the second waste liquid tank.

[0016] The equipment for preparing alfalfa total flavonoid extract of this invention uses a pulverizing device to pulverize dried alfalfa stems and leaves. The pulverized alfalfa is conveyed by a first conveying device to the inlet of a hot reflux extraction device and enters the hot reflux extraction device. A first storage tank is used to store ethanol solution. The ethanol solution in the first storage tank is added to the hot reflux extraction device, and hot reflux extraction is performed using a heating device and a first condenser. The solution in the hot reflux extraction device is filtered through a filter plate and then enters a distillation device. The hot reflux extraction operation is repeated multiple times, and the extracted solution is distilled under reduced pressure to form a paste. A second storage tank is used to store distilled water. The distilled water in the second storage tank is added to the distillation device to stir and dissolve the paste. The dissolved solution is then conveyed by a first conveying pump to a centrifuge for centrifugation. The centrifuged liquid is then passed through a second... Three pumps deliver the solution to the extraction device. A third storage tank stores petroleum ether. The petroleum ether in the third storage tank is added to the extraction device for extraction. The extracted aqueous layer is added to a first conditioning device for pH adjustment. The extracted petroleum ether is then added to a first waste liquid tank. After conditioning, the solution in the first conditioning device is added to a resin adsorption device, where macroporous resin adsorbs the organic matter in the solution. A fifth storage tank stores distilled water, and a sixth storage tank stores ethanol solution. First, the macroporous resin is rinsed with distilled water from the fifth storage tank, then rinsed with ethanol from the sixth storage tank to remove organic matter. The rinsed distilled water enters a second waste liquid tank, and the rinsed ethanol solution is pumped into a distillation device via a fourth pump. The solution is then subjected to vacuum distillation to form a paste, which is discharged via a second pump and a discharge pipe. This invention can extract total flavonoids from alfalfa with high extraction efficiency and good purification effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the equipment for preparing alfalfa total flavonoid extract according to the present invention;

[0018] Figure 2 This is a schematic diagram of the hot reflux extraction device in one embodiment of the equipment for preparing alfalfa total flavonoid extract according to this utility model;

[0019] Figure 3 This is a schematic diagram of the distillation apparatus in one embodiment of the equipment for preparing alfalfa total flavonoid extract according to this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure of the extraction device in one embodiment of the equipment for preparing alfalfa total flavonoid extract of this utility model;

[0021] Figure 5 This is a schematic diagram of the connection structure of the resin adsorption device in one embodiment of the equipment for preparing alfalfa total flavonoid extract according to this utility model.

[0022] Component designation:

[0023] 100. Crushing device; 110. First conveying device; 200. Hot reflux extraction device; 210. First storage tank; 211. Third valve; 220. Filter plate; 230. First condenser; 240. Heating device; 250. First tank body; 260. First stirring assembly; 270. First valve; 300. Distillation device; 310. Second storage tank; 320. Fourth valve; 330. First transfer pump; 340. Second transfer pump; 350. Second stirring assembly; 360. Second condenser; 370. Second valve; 380. First connecting pipe; 390. Discharge pipe; 400. Centrifuge; 410. Third transfer pump; 500. Extraction device; 510. First metering assembly; 511. First piping assembly 512, First metering pump; 520, Third storage tank; 530, Third stirring assembly; 540, Fifth valve; 550, Second connecting pipe; 600, First waste liquid tank; 610, Sixth valve; 700, First conditioning device; 710, Second metering assembly; 720, Fourth storage tank; 730, Fourth stirring assembly; 740, Seventh valve; 750, First observation tube; 760, Eighth valve; 800, Resin adsorption device; 810, Third metering assembly; 820, Fourth metering assembly; 830, Fifth storage tank; 840, Sixth storage tank; 850, Fourth transfer pump; 860, Ninth valve; 870, Third connecting pipe; 900, Second waste liquid tank; 910, Tenth valve; 920, Second observation tube. Detailed Implementation

[0024] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0025] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, equipment, and materials similar to or equivalent to those in the embodiments of this invention.

[0026] Please see Figures 1 to 5This utility model provides a preparation device for alfalfa total flavonoid extract, comprising: a pulverizing device 100, a hot reflux extraction device 200, a distillation device 300, a centrifuge 400, an extraction device 500, a first waste liquid tank 600, a first conditioning device 700, a resin adsorption device 800, and a second waste liquid tank 900. The discharge port of the pulverizing device 100 is connected to the inlet of the first conveying device 110. The discharge port of the first conveying device 110 is connected to the inlet of the hot reflux extraction device 200, and the inlet of the hot reflux extraction device 200 is connected to the discharge port of the first storage tank 210 via a pipe. The hot reflux extraction device 200 is equipped with a filter plate 220, a first condenser 230 is provided on the top of the hot reflux extraction device 200, and a heating device 240 is provided on the hot reflux extraction device 200. The first inlet of the distillation apparatus 300 is connected to the outlet of the hot reflux extraction apparatus 200. The second inlet of the distillation apparatus 300 is connected to the outlet of the second storage tank 310 via a pipe. The outlet of the distillation apparatus 300 is connected to the inlets of the first transfer pump 330 and the second transfer pump 340 via pipes. The outlet of the second transfer pump 340 is connected to the discharge pipe 390. The condensate outlet of the distillation apparatus 300 is connected to a negative pressure device via a pipe. The inlet of the centrifuge 400 is connected to the outlet of the first transfer pump 330 via a pipe. The outlet of the centrifuge 400 is connected to the inlet of the third transfer pump 410 via a pipe. The inlet of the extraction apparatus 500 is connected to the outlet of the third transfer pump 410 via a pipe. The top of the extraction apparatus 500 is connected to the outlet of the third storage tank 520 via the first metering component 510. The inlet of the first waste liquid tank 600 is connected to the outlet of the extraction apparatus 500 via a pipe. The inlet of the first modulation device 700 is connected to the outlet of the extraction device 500 via a pipe. The top of the first modulation device 700 is connected to the outlet of the fourth storage tank 720 via the second metering component 710. The inlet of the resin adsorption device 800 is connected to the outlet of the first modulation device 700 via a pipe. The top of the resin adsorption device 800 is connected to the outlets of the fifth storage tank 830 and the sixth storage tank 840 via the third metering component 810 and the fourth metering component 820, respectively. The outlet of the resin adsorption device 800 is connected to the inlet of the fourth transfer pump 850 via a pipe. The outlet of the fourth transfer pump 850 is connected to the third inlet of the distillation device 300 via a pipe. The resin adsorption device 800 is filled with macroporous resin. The inlet of the second waste liquid tank 900 is connected to the outlet of the resin adsorption device 800 via a pipe.

[0027] This invention uses a pulverizing device 100 to pulverize dried alfalfa stems and leaves. The pulverized alfalfa is then conveyed by a first conveying device 110 to the inlet of a hot reflux extraction device 200 and enters the device. A first storage tank 210 stores an ethanol solution. The ethanol solution in the first storage tank 210 is added to the hot reflux extraction device 200, and hot reflux extraction is performed using a heating device 240 and a first condenser 230. The solution in the hot reflux extraction device 200 is filtered through a filter plate 220 and then enters a distillation device 300. The hot reflux extraction is then repeated multiple times, and the extracted solution is distilled under reduced pressure in the distillation device 300 to form a paste. A second storage tank 310 stores distilled water. The distilled water in the second storage tank 310 is added to the distillation device 300 to stir and dissolve the paste. The dissolved solution is then conveyed by a first transfer pump 330 to a centrifuge 400 for centrifugation. The centrifuged liquid is then conveyed by a third transfer pump 410 to an extraction device. Within 500, the third storage tank 520 is used to store petroleum ether. The petroleum ether in the third storage tank 520 is added to the extraction device 500 for extraction. The extracted water layer is added to the first conditioning device 700 for pH adjustment. The extracted petroleum ether is added to the first waste liquid tank 600. After the solution in the first conditioning device 700 is prepared, it is added to the resin adsorption device 800, where macroporous resin adsorbs the organic matter in the solution. The fifth storage tank 830 is used to store distilled water, and the sixth storage tank 840 is used to store ethanol solution. First, the macroporous resin is rinsed with distilled water in the fifth storage tank 830, and then the macroporous resin is rinsed with ethanol in the sixth storage tank 840 to remove organic matter. The rinsed distilled water enters the second waste liquid tank 900, and the rinsed ethanol solution enters the distillation device 300 via the fourth transfer pump 850. Then, the solution is subjected to vacuum distillation to form a paste, which is discharged via the second transfer pump 340 and the discharge pipe 390. The discharged paste is dried to obtain the product.

[0028] It should be noted that the hot reflux extraction technology is an existing technology, and the first condenser is a partial condenser, which is also an existing technology. Therefore, the principle of the hot reflux extraction technology will not be described in detail here.

[0029] Please see Figure 1 and Figure 2In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the first conveying device 110 is a screw conveyor. The hot reflux extraction device 200 includes a first tank 250, on which a first stirring assembly 260 is provided. The top of the first tank 250 is connected to the inlet of the first condenser 230 through a pipe. The heating device 240 is provided on the outside of the first tank 250. A first valve 270 is provided at the outlet of the first tank 250, and the first valve 270 is connected to the first inlet of the distillation device 300.

[0030] Please see Figure 1 and Figure 3 In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the distillation device 300 is equipped with a second stirring assembly 350. The top of the distillation device 300 is connected to the inlet of the second condenser 360 via a pipe, and the outlet of the second condenser 360 is connected to the negative pressure device via a pipe. A second valve 370 is provided at the outlet of the distillation device 300, and the second valve 370 is connected to the inlets of the first delivery pump 330 and the second delivery pump 340 respectively via a first connecting pipe 380. The negative pressure device includes a solvent recovery tank and a vacuum pump assembly. The outlet of the second condenser 360 is connected to the inlet of the solvent recovery tank via a pipe, and the vacuum pump assembly is connected to the top of the solvent recovery tank via a pipe. A third valve 211 is provided at the outlet of the first storage tank 210, and a fourth valve 320 is provided at the outlet of the second storage tank 310. It should be noted that the negative pressure device is prior art, and the negative pressure device is used for the reduced pressure distillation process of the distillation device 300. The negative pressure device is not shown in the accompanying drawings.

[0031] Please see Figure 4In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the extraction device 500 is equipped with a third stirring assembly 530, and the first metering assembly 510 includes a first pipeline assembly 511 and a first metering pump 512. The two ends of the first pipeline assembly 511 are respectively connected to the top of the extraction device 500 and the outlet of the third storage tank 520, and the first metering pump 512 is installed on the first pipeline assembly 511. A fifth valve 540 is provided at the outlet of the extraction device 500. The fifth valve 540 is connected to the inlet of the first waste liquid tank 600 and the inlet of the first modulation device 700 respectively through a second connecting pipeline 550. A sixth valve 610 is provided at the inlet of the first waste liquid tank 600, and a seventh valve 740 and a first observation tube 750 are provided at the inlet of the first modulation device 700. The solution in the extraction device 500 is extracted using petroleum ether in the third storage tank 520. The fat-soluble impurities in the solution will be extracted by the petroleum ether. The amount of petroleum ether added can be controlled by the first metering pump 512. The first observation tube 750 is useful for observing the oil-water separation liquid level.

[0032] Please see Figure 4 In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the first modulation device 700 is equipped with a fourth stirring assembly 730, and the second metering assembly 710 includes a second pipeline assembly and a second metering pump. The two ends of the second pipeline assembly are respectively connected to the top of the first modulation device 700 and the outlet of the fourth storage tank 720. The second metering pump is mounted on the second pipeline assembly, and an eighth valve 760 is provided at the outlet of the first modulation device 700. The fourth storage tank 720 is used to store acid solution, and the second metering assembly 710 is used to control the amount of acid solution added to the first modulation device 700.

[0033] Please see Figure 5 In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, the third metering component 810 includes a third pipeline component and a third metering pump. The two ends of the third pipeline component are respectively connected to the top of the resin adsorption device 800 and the outlet of the fifth storage tank 830. The third metering pump is mounted on the third pipeline component. The fourth metering component 820 includes a fourth pipeline component and a fourth metering pump. The two ends of the fourth pipeline component are respectively connected to the top of the resin adsorption device 800 and the outlet of the sixth storage tank 840. The fourth metering pump is mounted on the fourth pipeline component. The third metering component 810 is used to control the amount of distilled water when rinsing the macroporous resin, and the fourth metering component 820 is used to control the amount of ethanol solution when rinsing the macroporous resin.

[0034] Please see Figure 5In one example of the preparation equipment for alfalfa total flavonoid extract of this utility model, a ninth valve 830 is provided at the outlet of the resin adsorption device 800. The ninth valve 860 is connected to the inlet of the fourth delivery pump 850 and the inlet of the second waste liquid tank 900 respectively through a third connecting pipe 870. A tenth valve 910 and a second observation tube 920 are provided at the inlet of the second waste liquid tank 900. The second observation tube 920 is useful for observing the color of the distilled water used to rinse the macroporous resin, which can help determine the end point of the distilled water rinsing process.

[0035] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A device for preparing total flavonoid extract from alfalfa, characterized in that, include: A crushing device, wherein the outlet of the crushing device is connected to the inlet of the first conveying device; A hot reflux extraction device is provided, wherein the outlet of the first conveying device is connected to the inlet of the hot reflux extraction device, the inlet of the hot reflux extraction device is connected to the outlet of the first storage tank through a pipe, a filter plate is provided inside the hot reflux extraction device, a first condenser is provided on the top of the hot reflux extraction device, and a heating device is provided on the hot reflux extraction device. A distillation apparatus, wherein the first inlet of the distillation apparatus is connected to the outlet of the hot reflux extraction apparatus, the second inlet of the distillation apparatus is connected to the outlet of the second storage tank via a pipe, the outlet of the distillation apparatus is connected to the inlet of the first conveying pump and the second conveying pump via pipes respectively, the outlet of the second conveying pump is connected to the discharge pipe, and the condensation outlet of the distillation apparatus is connected to the negative pressure device via a pipe. A centrifuge, wherein the inlet of the centrifuge is connected to the outlet of the first conveying pump via a pipe, and the outlet of the centrifuge is connected to the inlet of the third conveying pump via a pipe; An extraction device, wherein the inlet of the extraction device is connected to the outlet of the third conveying pump via a pipe, and the top of the extraction device is connected to the outlet of the third storage tank via a first metering component; The first waste liquid tank has its inlet connected to the outlet of the extraction device via a pipe. The first modulation device has its inlet connected to the outlet of the extraction device via a pipe, and its top is connected to the outlet of the fourth storage tank via a second metering component. The resin adsorption device has its inlet connected to the outlet of the first modulation device via a pipe. The top of the resin adsorption device is connected to the outlets of the fifth and sixth storage tanks via a third and a fourth metering component, respectively. The outlet of the resin adsorption device is connected to the inlet of a fourth conveying pump via a pipe. The outlet of the fourth conveying pump is connected to the third inlet of the distillation device via a pipe. The resin adsorption device is filled with macroporous resin. The second waste liquid tank has its inlet connected to the outlet of the resin adsorption device via a pipe.

2. The equipment for preparing alfalfa total flavonoid extract as described in claim 1, characterized in that, The hot reflux extraction device includes a first tank, on which a first stirring assembly is provided. The top of the first tank is connected to the inlet of the first condenser via a pipe. The heating device is provided outside the first tank. A first valve is provided at the outlet of the first tank and is connected to the first inlet of the distillation device.

3. The equipment for preparing alfalfa total flavonoid extract as described in claim 1, characterized in that, The distillation apparatus is equipped with a second stirring assembly. The top of the distillation apparatus is connected to the inlet of a second condenser via a pipe, and the outlet of the second condenser is connected to the negative pressure device via a pipe.

4. The equipment for preparing alfalfa total flavonoid extract as described in claim 3, characterized in that, The distillation apparatus is equipped with a second valve at the outlet, and the second valve is connected to the inlet of the first delivery pump and the second delivery pump respectively through a first connecting pipe.

5. The equipment for preparing alfalfa total flavonoid extract as described in claim 3, characterized in that, The negative pressure device includes a solvent recovery tank and a vacuum pump assembly. The outlet of the second condenser is connected to the inlet of the solvent recovery tank via a pipe, and the vacuum pump assembly is connected to the top of the solvent recovery tank via a pipe.

6. The equipment for preparing alfalfa total flavonoid extract as described in claim 1, characterized in that, The extraction device is equipped with a third stirring assembly. The first metering assembly includes a first pipeline assembly and a first metering pump. The two ends of the first pipeline assembly are respectively connected to the top of the extraction device and the outlet of the third storage tank. The first metering pump is installed on the first pipeline assembly.

7. The equipment for preparing alfalfa total flavonoid extract as described in claim 6, characterized in that, The extraction device is equipped with a fifth valve at its outlet. The fifth valve is connected to the first waste liquid tank and the inlet of the first modulation device via a second connecting pipe. The first waste liquid tank is equipped with a sixth valve at its inlet, and the first modulation device is equipped with a seventh valve and a first observation tube at its inlet.

8. The equipment for preparing alfalfa total flavonoid extract as described in claim 1, characterized in that, The first modulation device is equipped with a fourth stirring assembly, the second metering assembly includes a second pipeline assembly and a second metering pump, the two ends of the second pipeline assembly are respectively connected to the top of the first modulation device and the outlet of the fourth storage tank, the second metering pump is installed on the second pipeline assembly, and an eighth valve is provided at the outlet of the first modulation device.

9. The equipment for preparing alfalfa total flavonoid extract as described in claim 1, characterized in that, The third metering component includes a third pipeline assembly and a third metering pump. The two ends of the third pipeline assembly are respectively connected to the top of the resin adsorption device and the outlet of the fifth storage tank. The third metering pump is mounted on the third pipeline assembly. The fourth metering component includes a fourth pipeline assembly and a fourth metering pump. The two ends of the fourth pipeline assembly are respectively connected to the top of the resin adsorption device and the outlet of the sixth storage tank. The fourth metering pump is mounted on the fourth pipeline assembly.

10. The equipment for preparing alfalfa total flavonoid extract as described in claim 9, characterized in that, The resin adsorption device is equipped with a ninth valve at the outlet. The ninth valve is connected to the inlet of the fourth conveying pump and the inlet of the second waste liquid tank through a third connecting pipe. The inlet of the second waste liquid tank is equipped with a tenth valve and a second observation tube.

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