Multistage filtering device for puerarin extraction

Abstract

The invention discloses a multi-stage filtering device for puerarin extraction, and relates to the technical field of filtering devices, the multi-stage filtering device comprises a filtering box, a through hole is formed in the side wall of the top end of the filtering box, a liquid inlet pipe is fixedly connected to the interior of the corresponding through hole, and a filtering plate is fixedly connected to the inner wall of the filtering box. According to the device, when the filter plate is used for filtering plant fragments and large-particle impurities in a radix puerariae extracting solution, the stop lever extends out of the separation shell, when the plant fragments and the large-particle impurities blocked in filter holes of the filter plate are flushed to the lower portion from the filter holes, the plant fragments and the large-particle impurities are stopped on one side of the stop lever through the stop lever, and the plant fragments and the large-particle impurities are separated from the separation shell; according to the puerarin filtering and extracting device, plant fragments and large-particle impurities are not contained in a puerarin extracting solution after being filtered by the filtering plate, the plant fragments and the large-particle impurities can be collected, subsequent continuous filtering and extracting of puerarin are facilitated, and the extracting efficiency and reliability of the puerarin filtering and extracting device are improved to a great extent when the puerarin filtering and extracting device is used for filtering and extracting puerarin.

Description

Technical Field

[0001] The invention belongs to the technical field of filtering devices, and in particular relates to a multi-stage filtering device for extracting puerarin. Background Art

[0002] Puerarin, also known as puerarin, is an isoflavone derivative with coronary dilation effect isolated from the traditional Chinese medicine Pueraria lobata. It exists in the roots of Pueraria lobata and Pueraria lobata of the leguminous plants, and puerarin is generally obtained by filtering.

[0003] Before extracting puerarin, it is first necessary to use a filter plate to filter the plant debris and large particle impurities in the pueraria extract, and then discharge the filtered pueraria extract to the surface of the filter membrane, so as to filter out the polysaccharides, proteins and other macromolecular impurities in the pueraria extract, and complete the extraction of puerarin. However, in the prior art, when the pueraria extract is discharged to the surface of the filter plate, the plant debris and large particle impurities in the pueraria extract are easily squeezed into the filter holes on the surface of the filter plate under the action of impact force and gravity. As the pueraria extract is continuously discharged, the plant debris and large particle impurities squeezed into the filter holes are continuously impacted by the pueraria extract. At this time, the plant debris and large particle impurities are easily flushed out of the filter holes and mixed with the filtered pueraria extract. When the pueraria extract mixed with plant debris and large particle impurities is subsequently filtered using a filter membrane, the plant debris and large particle impurities are easily blocked by the membrane holes on the surface of the filter membrane. At this time, the effective filtration area on the surface of the filter membrane is greatly reduced, resulting in a decrease in the filtration efficiency of the filter membrane for the pueraria extract, affecting the extraction effect and reliability of puerarin.

[0004] Therefore, we propose a multi-stage filtration device for puerarin extraction to solve the above problems. Summary of the invention

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: 4. The filtration unit of claim 1, wherein the filter element is a filter element and the filter element is, at least one of the two filter elements is a filter element, and at least one of the filter elements is a filter element.

[0006] Preferably, the blockage processing component includes a first electric slide rail fixedly connected to the inner wall of the first groove, the bottom end side walls of the two first electric slide rails are slidably connected with a first slide plate, one end side wall of the filter box is provided with a third groove communicating with the two first grooves, the first slide plates are located in the third groove, the bottom end side walls of the two first slide plates are fixedly connected with a first electric telescopic rod, the telescopic ends of the two first electric telescopic rods are fixedly connected with the same connecting plate, and the bottom end side wall of the connecting plate is fixedly connected with a plurality of push rods.

[0007] Preferably, the scraping assembly includes a second electric slide rail fixedly connected to the inner wall of the second groove, the bottom end side walls of the second electric slide rail are slidably connected with a second slide plate, the inner wall of one end of the processing box is provided with a fourth groove communicating with the two second grooves, the second slide plates are located in the fourth groove, and the bottom end side walls of the two second slide plates are fixedly connected with a second electric telescopic rod.

[0008] Preferably, the telescopic ends of the two second electric telescopic rods are fixedly connected to the same L-shaped plate, one end side wall of the L-shaped plate is fixedly connected to the third electric telescopic rod, the telescopic end of the third electric telescopic rod is fixedly connected to a scraper, and the second groove and the fourth groove are both located below the filter plate.

[0009] Preferably, the separation assembly includes a first motor fixedly connected to the side wall at one end of the filter box, the inner walls at both ends of the filter box are rotatably connected to the same separation shell, the output end of the first motor passes through the side wall of the filter box and is fixedly connected to the side wall at one end of the separation shell, the bottom side wall of the separation shell is fixedly connected to a fourth electric telescopic rod, the telescopic end of the fourth electric telescopic rod is fixedly connected to a support plate, the top side wall of the support plate is fixedly connected to a plurality of staggered baffle rods, and the top side wall of the separation shell is provided with a plurality of through holes for the baffle rods to extend out.

[0010] Preferably, the side walls of the two separation boxes and the filter box at one adjacent end are provided with communicating discharge ports, and a second motor is fixedly connected to one end side wall of one of the separation boxes, and the inner walls at both ends of the separation boxes are rotatably connected to the same rotating rod, and the output end of the second motor passes through the side wall of the separation box and is fixedly connected to one end of the rotating rod, and the rod wall of the rotating rod is fixedly connected to a collecting plate, and the side walls at both ends of the collecting plate are in conflict with the inner wall of the separation box.

[0011] Preferably, the secondary filtration assembly includes a shell with side walls at both ends of the processing box fixedly connected, one end of the side wall of the shell is fixedly connected to a third motor, the inner walls at both ends of the shell are rotatably connected to the same collecting rod, the output end of the third motor passes through the side wall of the shell and is fixedly connected to one end of the collecting rod, a filter membrane is wound around the wall of the collecting rod in the shell on one side of the processing box, one end of the filter membrane passes through the shell and the side wall of the processing box and is fixedly connected to the wall of the collecting rod in the shell on the other side.

[0012] Preferably, the detection component includes a pressure sensor fixedly connected to the inner wall of the bottom end of the processing box, the detection end of the pressure sensor is fixedly connected to a support spring, the upper end of the support spring is fixedly connected to a liquid guide plate, and a gap is left between the surrounding side walls of the liquid guide plate and the inner wall of the processing box.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The scraping component and the separation component that are set up can make the baffle rod extend from the separation shell when the filter plate is used to filter the plant fragments and large particles of impurities in the kudzu root extract. When the plant fragments and large particles of impurities blocked in the filter holes of the filter plate rush down from the filter holes, the baffle rod is used to intercept the plant fragments and large particles of impurities on one side of the baffle rod, so that the kudzu root extract does not contain plant fragments and large particles of impurities after being filtered by the filter plate, and the plant fragments and large particles of impurities are prevented from being mixed again with the kudzu root extract filtered by the filter plate. When the kudzu root extract is subsequently filtered by the filter membrane, the plant fragments and large particles of impurities block the membrane holes on the surface of the filter membrane, resulting in a reduction in the effective filtration area of ​​the filter membrane surface, affecting the extraction of puerarin. In addition, the plant fragments and large particles of impurities can be collected, which is convenient for the subsequent filtering and extraction of puerarin, thereby greatly improving the extraction efficiency and reliability of the device when filtering and extracting puerarin. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the present invention from other angles; Figure 3 It is a schematic cross-sectional view of some structures of the present invention. Figure 1 ; Figure 4 It is a schematic cross-sectional view of some structures of the present invention. Figure 2 ; Figure 5 It is a schematic cross-sectional view of some structures of the present invention. Figure 3 ; Figure 6 For the present invention Figure 5 A magnified view of part A; Figure 7 It is a schematic cross-sectional view of some structures of the present invention. Figure 4 ; Figure 8 It is a schematic cross-sectional view of some structures of the present invention. Figure 5 ; Fig. 9 It is a schematic cross-sectional view of some structures of the present invention. Figure 6 .

[0015] In the figure: 1, filter box; 2, liquid inlet pipe; 3, filter plate; 4, support plate; 5, bottom plate; 6, treatment box; 7, liquid outlet pipe; 8, first groove; 9, blockage treatment component; 91, first electric slide rail; 92, first slide plate; 93, third groove; 94, first electric telescopic rod; 95, connecting plate; 96, push rod; 10, second groove; 11, scraping component; 111, second electric slide rail; 112, second slide plate; 113, fourth groove; 114, second electric telescopic rod; 115, L-shaped plate; 11 6. The third electric telescopic rod; 117. The scraper; 12. The separation component; 121. The first motor; 122. The separation shell; 123. The fourth electric telescopic rod; 124. The support plate; 125. The blocking rod; 126. The discharge port; 127. The second motor; 128. The rotating rod; 129. The collecting plate; 13. The secondary filtering component; 131. The shell; 132. The third motor; 133. The collecting rod; 134. The filter membrane; 14. The detection component; 141. The pressure sensor; 142. The support spring; 143. The liquid guide plate. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] The following electrical components are all electrically connected to the peripheral PLC controller.

[0018] Reference Figure 1 - Fig. 9, a multi-stage filtering device for extracting puerarin, comprising a filter box 1, a through hole is provided on the top side wall of the filter box 1, and a liquid inlet pipe 2 is fixedly connected to the corresponding through hole, a filter plate 3 is fixedly connected to the inner wall of the filter box 1, two support plates 4 are symmetrically fixedly connected to the bottom side wall of the filter box 1, and the bottom side walls of the two support plates 4 are fixedly connected to the same bottom plate 5, two treatment boxes 6 are symmetrically fixedly connected to the side walls of both ends of the filter box 1, two through holes are provided on the bottom side walls of the two treatment boxes 6, and liquid outlet pipes 7 are fixedly connected to the corresponding through holes, two first grooves 8 are symmetrically provided on the inner walls of both ends of the filter box 1, and a blockage processing component 9 is fixedly connected to the inner wall of the first groove 8, two second grooves 10 are symmetrically provided on the inner walls of both ends of the filter box 1, and a scraping component 11 is fixedly connected to the inner wall of the second groove 10, a separation component 12 is fixedly connected to the side wall of one end of the filter box 1, secondary filtering components 13 are fixedly connected to the side walls of both ends of the treatment box 6, and a detection component 14 is fixedly connected to the inner wall of the bottom end of the treatment box 6.

[0019] In the embodiment, the blockage processing component 9 includes a first electric slide rail 91 fixedly connected to the inner wall of the first groove 8, the bottom end side walls of the two first electric slide rails 91 are slidably connected with a first slide plate 92, one end side wall of the filter box 1 is provided with a third groove 93 communicating with the two first grooves 8, the first slide plates 92 are both located in the third groove 93, the bottom end side walls of the two first slide plates 92 are fixedly connected with a first electric telescopic rod 94, the telescopic ends of the two first electric telescopic rods 94 are fixedly connected with the same connecting plate 95, and the bottom end side wall of the connecting plate 95 is fixedly connected with a plurality of push rods 96.

[0020] Specifically, after the extraction of puerarin is completed, before the plant fragments and large granular impurities on the surface of the separation shell 122 are processed, the first electric slide rail 91 is controlled to start, driving the first slide plate 92 to move, so that the connecting plate 95 is moved out of the third groove 93. When multiple push rods 96 are located above each group of filter holes arranged longitudinally on the surface of the filter plate 3, the first electric telescopic rod 94 is controlled to start, driving the connecting plate 95 and the push rod 96 to move downward, so that the push rod 96 is inserted into the filter holes on the surface of the filter plate 3, thereby pushing the plant fragments and large granular impurities blocked in the filter holes out of the filter holes and dropping them on the surface of the separation shell 122, which is convenient for the subsequent collection and processing of the plant fragments and large granular impurities, and at the same time can improve the filtering efficiency of the filter plate 3 for the pueraria extract.

[0021] In the embodiment, the scraping assembly 11 includes a second electric slide rail 111 fixedly connected to the inner wall of the second groove 10, and the bottom end side walls of the second electric slide rail 111 are slidably connected to the second slide plate 112. The inner wall of one end of the processing box 6 is provided with a fourth groove 113 communicating with the two second grooves 10, and the second slide plates 112 are located in the fourth groove 113. The bottom end side walls of the two second slide plates 112 are fixedly connected to the second electric telescopic rod 114; The telescopic ends of the two second electric telescopic rods 114 are fixedly connected to the same L-shaped plate 115, one end side wall of the L-shaped plate 115 is fixedly connected to the third electric telescopic rod 116, the telescopic end of the third electric telescopic rod 116 is fixedly connected to the scraper 117, and the second groove 10 and the fourth groove 113 are both located below the filter plate 3; The separation assembly 12 includes a first motor 121 fixedly connected to the side wall at one end of the filter box 1, and the inner walls at both ends of the filter box 1 are rotatably connected to the same separation shell 122, the output end of the first motor 121 penetrates the side wall of the filter box 1 and is fixedly connected to the side wall at one end of the separation shell 122, the bottom side wall of the separation shell 122 is fixedly connected to a fourth electric telescopic rod 123, the telescopic end of the fourth electric telescopic rod 123 is fixedly connected to a support plate 124, the top side wall of the support plate 124 is fixedly connected to a plurality of staggered blocking rods 125, and the top side wall of the separation shell 122 is provided with a plurality of through holes for the blocking rods 125 to extend out; The side walls of the two separation boxes adjacent to the filter box 1 are both provided with interconnected discharge ports 126, one end side wall of one of the separation boxes is fixedly connected to a second motor 127, and the inner walls at both ends of the separation box are rotatably connected to the same rotating rod 128, the output end of the second motor 127 passes through the side wall of the separation box and is fixedly connected to one end of the rotating rod 128, the rod wall of the rotating rod 128 is fixedly connected to a collecting plate 129, and the side walls at both ends of the collecting plate 129 are in conflict with the inner wall of the separation box.

[0022] Specifically, when the filter plate 3 is used to filter the plant fragments and large particles of impurities in the kudzu root extract, the baffle 125 can be extended from the separation shell 122. When the plant fragments and large particles of impurities blocked in the filter holes of the filter plate 3 rush downward from the filter holes, the baffle 125 is used to intercept the plant fragments and large particles of impurities on one side of the baffle 125, so that the kudzu root extract does not contain plant fragments and large particles of impurities after being filtered by the filter plate 3, and the plant fragments and large particles of impurities are prevented from mixing again with the kudzu root extract filtered by the filter plate 3. When the kudzu root extract is subsequently filtered by the filter membrane 134, the plant fragments and large particles of impurities block the membrane pores on the surface of the filter membrane 134, resulting in a reduction in the effective filtering area on the surface of the filter membrane 134, affecting the extraction of puerarin. In addition, the plant fragments and large particles of impurities can be collected, which is convenient for the subsequent filtering and extraction of puerarin, thereby greatly improving the extraction efficiency and reliability of the device when filtering and extracting puerarin.

[0023] In the embodiment, the secondary filtering assembly 13 includes a shell 131 to which the side walls at both ends of the processing box 6 are fixedly connected, and the side walls at one end of the shell 131 are fixedly connected to the third motor 132, and the inner walls at both ends of the shell 131 are rotatably connected to the same collecting rod 133, and the output end of the third motor 132 passes through the side wall of the shell 131 and is fixedly connected to one end of the collecting rod 133, and the rod wall of the collecting rod 133 in the shell 131 on one side of the processing box 6 is wound with a filter membrane 134, and one end of the filter membrane 134 passes through the shell 131 and the side wall of the processing box 6 and is fixedly connected to the rod wall of the collecting rod 133 in the shell 131 on the other side; The detection component 14 includes a pressure sensor 141 fixedly connected to the inner wall of the bottom end of the processing box 6, the detection end of the pressure sensor 141 is fixedly connected to a support spring 142, the upper end of the support spring 142 is fixedly connected to a liquid guide plate 143, and a gap is left between the side walls around the liquid guide plate 143 and the inner wall of the processing box 6.

[0024] Specifically, since the kudzu root extract filtered from the filter membrane 134 will first fall on the liquid guide plate 143, the pressure sensor 141 will continue to feel the pressure at this time. However, as the filter membrane 134 filters the kudzu root extract, polysaccharides, proteins and other macromolecular impurities in the kudzu root extract will continue to deposit on the surface of the filter membrane 134, resulting in a decrease in the filtration efficiency of the filter membrane 134. At this time, the amount of kudzu root extract discharged downward from the filter membrane 134 decreases, and the amount of kudzu root extract received by the liquid guide plate 143 decreases accordingly. When the pressure detected by the pressure sensor 141 continues to decrease, it means that there are too many impurities accumulated on the surface of the filter membrane 134 at this time, and then the first motor 12 is controlled. 1 is started, driving the separation shell 122 to rotate toward the other discharge port 126, so that the kudzu root extract is discharged into another processing box 6, and the kudzu root extract is filtered. Then, the third motors 132 on both sides of the processing box 6 that control the surface of the filter membrane 134 to push the excess impurities are started at the same time, driving the two collecting rods 133 to rotate in the same reverse direction, so that the filter membrane 134 wound on one of the collecting rods 133 moves into the processing box 6. At this time, the used filter membrane 134 will be wound on the rod wall of the other collecting rod 133, completing the replacement of the filter membrane 134, facilitating the subsequent filtration of the kudzu root extract, and improving the filtration efficiency and use effect of the device when extracting puerarin.

[0025] The operating principle of the present invention is now described as follows: In the present invention, when it is necessary to extract puerarin, the first motor 121 is first controlled to start, driving the separation shell 122 to rotate, so that the bottom end of the separation shell 122 conflicts with the inner wall of the bottom end of one of the discharge holes, and then the fourth electric telescopic rod 123 is controlled to start, driving the support plate 124 to move upward, so that the blocking rod 125 extends from the separation shell 122, and then the pueraria extract is discharged from the liquid inlet pipe 2 into the filter box 1, and the plant fragments and large particles of impurities in the pueraria extract are filtered by the filter plate 3. The filtered pueraria extract will fall on the surface of the separation shell 122. Since the separation shell 122 is in an inclined state at this time, the pueraria extract falling on the surface of the separation shell 122 will flow to the inclined end of the separation shell 122, and finally discharged. The puerarin extract is filtered out by the filter membrane 134 in the treatment box 6, and the puerarin extract is extracted. The filtered puerarin falls on the surface of the liquid guide plate 143, and then flows to the bottom of the corresponding treatment box 6, and is finally discharged from the liquid outlet pipe 7. When the plant fragments and large particles of impurities in the pueraria extract are filtered by the filter plate 3, the plant fragments and large particles of impurities are easily washed into the filter holes. With the continuous discharge of the pueraria extract, the plant fragments and large particles of impurities blocked in the filter holes are washed to the surface of the separation shell 122, and mixed with the pueraria extract filtered by the filter plate 3. When the liquid flows toward the inclined side of the separation shell 122, since the surface of the separation shell 122 is provided with a plurality of staggered baffles 125, when the kudzu root extract mixed with plant fragments passes through the plurality of baffles 125, the plant fragments in the kudzu root extract will be blocked by the baffles 125 and will not flow into the processing box 6 with the kudzu root extract. At this time, the plant fragments and large particles of impurities will remain on the surface of the baffles 125, preventing the plant fragments and large particles of impurities in the kudzu root extract from blocking the membrane pores on the surface of the filter membrane 134 when the kudzu root extract is subsequently filtered using the filter membrane 134, thereby affecting the filtering efficiency of the kudzu root extract. After the extraction of puerarin is completed, the first motor 121 is controlled to rotate in the opposite direction, so that the bottom end of the separation shell 122 is aligned with the other side. The inner wall of the bottom end of the discharge port 126 is in conflict with the second motor 127, and then the second motor 127 is controlled to start, driving the rotating rod 128 to rotate, so that the rotating rod 128 drives the collecting plate 129 to rotate toward the discharge port 126, and then the first motor 121 is controlled to rotate so that the separation shell 122 is in a horizontal position. At this time, one end of the collecting plate 129 is located below the separation shell 122, and then the second electric slide rail 111 is controlled to start, driving the second slide plate 112 to move, so that the L-shaped plate 115 is located above the separation shell 122, and then the first electric telescopic rod 94 is controlled to retract, driving the support plate 124 and the blocking rod 125 to move toward the inside of the separation shell 122. When one end of the blocking rod 125 is flush with the surface of the separation shell 122, the first electric telescopic rod 94 is controlled to stop retracting.Since the size of the blocking rod 125 is consistent with the size of the through hole opened in the top side wall of the separation shell 122, after the blocking rod 125 enters the separation shell 122, the plant fragments and large particles of impurities adhered to the wall of the blocking rod 125 will remain on the upper surface of the separation shell 122, and then the second electric telescopic rod 114 is controlled to start, so that the scraper 117 contacts the upper surface of the separation shell 122, and then the second electric slide rail 111 is controlled to continue to start, driving the scraper 117 to move toward the collecting plate 129, thereby scraping the plant fragments and large particles of impurities on the surface of the separation shell 122 to one end of the separation shell 122. After the second electric slide rail 111 moves to the end, the third electric telescopic rod 116 is controlled to start, driving the scraper 117 to move toward the collecting plate 129, thereby pushing the plant fragments on the surface of the separation shell 122 to the top of the collecting plate 129, completing the collection of the plant fragments and large particles of impurities, and facilitating the subsequent filtration and extraction of puerarin. When filtering the plant fragments and large particles of impurities in the pueraria extract, the baffle 125 is extended from the separation shell 122. When the plant fragments and large particles of impurities blocked in the filter holes of the filter plate 3 rush down from the filter holes, the baffle 125 is used to intercept the plant fragments and large particles of impurities on one side of the baffle 125, so that the pueraria extract does not contain plant fragments and large particles of impurities after being filtered by the filter plate 3, and the plant fragments and large particles of impurities are prevented from mixing with the pueraria extract filtered by the filter plate 3 again. When the pueraria extract is subsequently filtered by the filter membrane 134, the plant fragments and large particles of impurities block the membrane holes on the surface of the filter membrane 134, resulting in a reduction in the effective filtering area on the surface of the filter membrane 134, affecting the extraction of puerarin. In addition, the plant fragments and large particles of impurities can be collected, which is convenient for the subsequent filtering and extraction of puerarin, and the extraction efficiency and reliability of the device for filtering and extracting puerarin are greatly improved.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multi-stage filtration device for puerarin extraction, comprising a filtration box (1), characterized in that: The top side wall of the filter box (1) is provided with a through hole, and a liquid inlet pipe (2) is fixedly connected to the corresponding through hole; the inner wall of the filter box (1) is fixedly connected to a filter plate (3); the bottom side wall of the filter box (1) is symmetrically fixedly connected to two support plates (4); the bottom side walls of the two support plates (4) are fixedly connected to the same bottom plate (5); the two end side walls of the filter box (1) are symmetrically fixedly connected to two treatment boxes (6); the bottom side walls of the two treatment boxes (6) are provided with two through holes, and the corresponding through holes are fixedly connected to liquid outlet pipes (7); Two first grooves (8) are symmetrically formed on the inner walls at both ends of the filter box (1), and a blockage treatment component (9) is fixedly connected to the inner wall of the first groove (8). Two second grooves (10) are symmetrically formed on the inner walls at both ends of the filter box (1), and a scraping component (11) is fixedly connected to the inner wall of the second groove (10). A separation component (12) is fixedly connected to the side wall at one end of the filter box (1), and secondary filter components (13) are fixedly connected to the side walls at both ends of the treatment box (6), and a detection component (14) is fixedly connected to the inner wall at the bottom end of the treatment box (6).

2. A multi-stage filtration device for puerarin extraction according to claim 1, characterized in that: The blockage treatment component (9) comprises a first electric slide rail (91) fixedly connected to the inner wall of the first groove (8); the bottom side walls of the two first electric slide rails (91) are slidably connected to a first slide plate (92); a third groove (93) communicating with the two first grooves (8) is formed on one end side wall of the filter box (1); the first slide plates (92) are located in the third groove (93); the bottom side walls of the two first slide plates (92) are fixedly connected to a first electric telescopic rod (94); the telescopic ends of the two first electric telescopic rods (94) are fixedly connected to the same connecting plate (95); and the bottom side wall of the connecting plate (95) is fixedly connected to a plurality of push rods (96).

3. A multi-stage filtration device for puerarin extraction according to claim 1, characterized in that: The scraping assembly (11) comprises a second electric slide rail (111) fixedly connected to the inner wall of the second groove (10); the bottom side walls of the second electric slide rail (111) are slidably connected to a second slide plate (112); a fourth groove (113) communicating with the two second grooves (10) is formed on the inner wall of one end of the processing box (6); the second slide plates (112) are located in the fourth groove (113); and the bottom side walls of the two second slide plates (112) are fixedly connected to a second electric telescopic rod (114).

4. A multi-stage filtration device for puerarin extraction according to claim 3, characterized in that: The telescopic ends of the two second electric telescopic rods (114) are fixedly connected to the same L-shaped plate (115); a side wall at one end of the L-shaped plate (115) is fixedly connected to a third electric telescopic rod (116); the telescopic end of the third electric telescopic rod (116) is fixedly connected to a scraper (117); and the second groove (10) and the fourth groove (113) are both located below the filter plate (3).

5. The multi-stage filtration device for puerarin extraction according to claim 1, characterized in that: The separation assembly (12) comprises a first motor (121) fixedly connected to a side wall at one end of a filter box (1); the inner walls at both ends of the filter box (1) are rotatably connected to a same separation shell (122); the output end of the first motor (121) passes through the side wall of the filter box (1) and is fixedly connected to a side wall at one end of the separation shell (122); a fourth electric telescopic rod (123) is fixedly connected to the bottom side wall of the separation shell (122); a support plate (124) is fixedly connected to the telescopic end of the fourth electric telescopic rod (123); a plurality of staggered blocking rods (125) are fixedly connected to the top side wall of the support plate (124); and a plurality of through holes for the blocking rods (125) to extend are provided on the top side wall of the separation shell (122).

6. A multi-stage filtration device for puerarin extraction according to claim 5, characterized in that: The side walls of the two separation boxes and the filter box (1) at one end thereof are both provided with a communicating discharge port (126); a second motor (127) is fixedly connected to one end of the side wall of one of the separation boxes; the inner walls at both ends of the separation box are rotatably connected to a same rotating rod (128); the output end of the second motor (127) passes through the side wall of the separation box and is fixedly connected to one end of the rotating rod (128); the rod wall of the rotating rod (128) is fixedly connected to a collecting plate (129); the side walls at both ends of the collecting plate (129) are in contact with the inner wall of the separation box.

7. A multi-stage filtration device for puerarin extraction according to claim 1, characterized in that: The secondary filtering assembly (13) comprises a shell (131) to which the side walls at both ends of the processing box (6) are fixedly connected, the side walls at one end of the shell (131) are fixedly connected to a third motor (132), the inner walls at both ends of the shell (131) are rotatably connected to the same collecting rod (133), the output end of the third motor (132) passes through the side wall of the shell (131) and is fixedly connected to one end of the collecting rod (133), a filter membrane (134) is wound around the rod wall of the collecting rod (133) in the shell (131) on one side of the processing box (6), and one end of the filter membrane (134) passes through the shell (131) and the side wall of the processing box (6) and is fixedly connected to the rod wall of the collecting rod (133) in the shell (131) on the other side.

8. The multi-stage filtration device for puerarin extraction according to claim 1, characterized in that: The detection assembly (14) comprises a pressure sensor (141) fixedly connected to the inner wall of the bottom end of the processing box (6); the detection end of the pressure sensor (141) is fixedly connected to a support spring (142); the upper end of each support spring (142) is fixedly connected to a liquid guide plate (143); and a gap is left between the surrounding side walls of the liquid guide plate (143) and the inner wall of the processing box (6).

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