A mother-child tank type phased extraction device and method

Abstract

The present invention discloses a mother-and-child tank type phased extraction device and method, which belongs to the technical field of tea extraction. It includes a first extraction tank, a storage tank, a support rod, a second extraction tank, a feed pipe and an air return structure. The first extraction tank has a hollow structure inside and penetrates one side end of the first extraction tank to form a first extraction chamber. The storage tank is fixed at the end of the first extraction tank that is not penetrated by the first extraction chamber, and the storage tank has a hollow structure inside to form a storage chamber. The present invention only needs to add water once during the entire extraction process to meet the extraction conditions of two different materials, thereby improving the extraction efficiency of both materials and achieving the purpose of extracting different materials under different extraction conditions in stages. At the same time, after the substances in the two extraction materials are mixed, the taste of the mixed liquid can be better, thereby improving the extraction efficiency while ensuring the quality and taste of the extraction.

Description

Technical Field

[0001] The invention relates to a mother-and-child tank type staged extraction device and method, belonging to the technical field of tea extraction. Background Art

[0002] During conventional tea extraction, different teas require different extraction temperatures and times, so they need to be extracted separately. In this way, when extracting compound teas, more than two separate extractions are required, and the water temperature and duration of the two extractions are different. The extractor needs to control and provide water of different temperatures for soaking, which increases the difficulty of extracting the compound tea and greatly reduces the extraction efficiency. At the same time, after the two teas are soaked separately and then mixed, the taste of the tea is poor and taste stratification is prone to occur. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a mother-and-child tank type staged extraction device and method, which solves the problem in the prior art that when extracting compound tea products, the efficiency of separate extraction is too low and taste stratification is easily produced.

[0004] The technical problem to be solved by the present invention is achieved by adopting the following technical scheme: a mother-and-child tank type staged extraction device, characterized in that it includes a first extraction tank, a storage tank, a support rod, a second extraction tank, a feed pipe and an air return structure, the first extraction tank is hollow inside and one side end of the first extraction tank is penetrated to form a first extraction chamber, the storage tank is fixed at the end of the first extraction tank that is not penetrated by the first extraction chamber, the storage tank is hollow inside to form a storage chamber, the storage chamber is connected to the first extraction chamber and a first channel is formed at the connection, the second extraction tank is arranged on a side of the first extraction chamber away from the storage tank, the second extraction tank is inserted into the first extraction chamber and is threadedly connected to the first extraction chamber, and the second extraction tank is empty The second extraction tank is penetrated by one end which is centrally arranged and away from the first extraction tank to form a second extraction chamber, the second extraction chamber is connected with the first extraction chamber and a second channel is formed at the connection, and the second channel and the first channel are provided with a closing component for closing the second channel and the first channel, a feed pipe is arranged on the second extraction tank and the first extraction tank and is used to pass materials into and out of the second extraction chamber and the first extraction chamber, a drain pipe is arranged in the storage chamber, and the other end of the drain pipe penetrates the storage tank and extends to the outside of the storage tank, a return air structure is arranged on the storage tank, and the return air structure makes the storage chamber connected with the second extraction chamber and the first extraction chamber respectively, and a plurality of support rods are arranged and fixed on the end face of the storage tank away from the first extraction tank.

[0005] The present invention is further configured as follows: a sealing component includes a driving motor, a driving shaft, a spline shaft, a movable shaft, a fixed plate, a second filter barrel, a first filter barrel and a driving structure, the driving structure is arranged between the first extraction tank and the storage tank and the driving structure part extends into the first extraction chamber, the first filter barrel is arranged in the first extraction chamber and is connected to the driving structure, the driving structure is used to drive the first filter barrel to move axially along the first extraction tank, the first filter barrel can close the connection between the first channel and the first extraction chamber, the fixed plate is fixed to the side of the second extraction chamber away from the first extraction tank, the second filter barrel is arranged in the second extraction chamber, the second filter barrel is coaxially arranged with the first filter barrel, the second filter barrel can close the connection between the second channel and the second extraction chamber, the movable shaft is arranged in the second extraction chamber In the extraction chamber, one end of the movable shaft away from the first extraction tank passes through the fixed plate along the axial direction of the second extraction tank and is threadedly connected to the fixed plate, the other end of the movable shaft passes through the second filter barrel and is rotatably connected to the second filter barrel, the movable shaft extends toward one end of the first extraction tank into the second channel and a spline groove is provided on the end face, the driving motor is fixed on the side of the storage tank away from the first extraction tank, the driving shaft is arranged in the storage chamber, one end of the driving shaft passes through the storage tank and is dynamically connected to the driving motor, the other end of the driving shaft extends into the first extraction chamber and passes through the first filter barrel, the driving shaft is slidably connected to the first filter barrel, the driving shaft and the movable shaft are coaxially arranged, the spline shaft is fixed to the end of the driving shaft away from the driving motor, and the end of the spline shaft away from the driving shaft is inserted into the spline groove and is axially slidably connected to the spline groove.

[0006] By adopting the above technical scheme, the two materials are respectively introduced into the second filter barrel and the first filter barrel through the feeding pipe for storage. At this time, the second filter barrel closes the second channel, and the first filter barrel closes the first channel. Since the soaking and extraction temperatures of the two materials are different, the material with high extraction temperature is located in the second filter barrel. At this time, high-temperature water is first introduced into the second filter barrel through the feeding pipe. After the high-temperature water enters the second filter barrel, it soaks the material. The water in the second filter barrel will flow into the second extraction chamber through the second filter barrel. At this time, the entire second extraction chamber is the high-temperature water for the first stage of extraction of the material. After the specified extraction time, the high-temperature water in the second extraction chamber extracts the material in the second filter barrel. At this time, the temperature of the high-temperature water drops to just meet the extraction temperature of the material in the first filter barrel. At this time, this part of water is mixed with the extracted components to form a first mixed liquid. Then the driving motor is started to drive the driving shaft and the spline shaft to rotate in turn, and finally drives the movable shaft to rotate, so that the movable shaft moves in the direction away from the first extraction tank under the action of the threaded structure. At this time, the second filter barrel releases the closure of the second channel, and the liquid in the second extraction chamber The first mixed liquid flows into the first extraction chamber through the second channel. The first mixed liquid entering the first extraction chamber will flow into the first filter barrel and soak the material in the first filter barrel to perform the second stage of extraction. After the specified extraction time, the driving structure drives the first filter barrel to move toward the second extraction tank. At this time, the first filter barrel releases the closure of the first channel. The first mixed liquid in the first extraction chamber is mixed with the components extracted from the material in the first filter barrel to form a second mixed liquid. The second mixed liquid flows into the storage chamber through the first channel for storage, thereby completing the entire extraction process. During the entire extraction process, only one addition of water is required to meet the extraction conditions of two different materials, thereby improving the extraction efficiency of both materials and achieving the purpose of extracting different materials under different extraction conditions in stages. At the same time, the substances extracted from the two extraction materials are mixed to make the taste of the mixed liquid better, thereby improving the extraction efficiency while ensuring the quality and taste of the extraction. In addition, the aroma generated by the liquid stored in the storage chamber can also be reintroduced into the first extraction chamber and the second extraction chamber through the return air structure, thereby further improving the aroma of the mixed liquid.

[0007] The present invention is further configured as follows: the feed pipeline includes a second fixed tube, a second movable tube, a first movable tube and a first fixed tube, the second movable tube is fixedly connected to the second filter barrel, one end of the second movable tube extends into the second filter barrel, the other end of the second movable tube is located outside the second filter barrel, one end of the second fixed tube passes through the fixed plate and is plugged into one end of the second movable tube located in the second filter barrel, the other end of the second fixed tube extends to the outside of the second extraction tank, the first movable tube is fixedly connected to the first filter barrel, one end of the first movable tube extends into the first filter barrel, the other end of the first movable tube extends into the first extraction chamber, one end of the first fixed tube passes through the first extraction tank and extends into the first extraction chamber, the other end of the first fixed tube is located outside the first extraction tank, and one end of the first fixed tube located in the first extraction chamber is plugged into one end of the first movable tube located in the first extraction chamber.

[0008] By adopting the above technical solution, the second fixed pipe and the first fixed pipe are connected with the external feeding equipment, and the feeding equipment can introduce different types of materials and water of different temperatures into the second fixed pipe and the first fixed pipe. During the movement of the second filter barrel and the first filter barrel, the second movable pipe and the first movable pipe can ensure that the pipeline is always in a connected state.

[0009] The present invention is further configured as follows: the driving structure includes a fixed block, an intermediate rod, an outer ring plate, an inner ring plate, a mounting groove, an electric push rod and an intermediate cavity; the fixed block is fixedly arranged in the first channel, the fixed block is penetrated by the extension path of the driving shaft, a plurality of through channels are provided on the fixed block along the extension direction of the driving shaft, the intermediate cavity is provided in the fixed block, and the intermediate cavity penetrates the first extraction tank in the radial direction; the inner ring plate is sleeved on the outer side of the first channel provided in the first extraction tank and the inner ring plate slides axially along the first extraction tank; the outer ring plate is sleeved on the outer side of the inner ring plate away from the first extraction tank; a connecting structure is provided between the outer ring plate and the inner ring plate, and the connecting structure is provided between the outer ring plate and the inner ring plate. The structure enables the outer ring plate and the inner ring plate to move synchronously, a plurality of mounting grooves are provided and are opened on the end face of the storage tank facing the first extraction tank, an electric push rod is fixedly arranged in the mounting groove and is provided with an output end, the output end of the electric push rod is fixedly connected to the outer ring plate, an intermediate rod is arranged in the intermediate cavity and the intermediate rod is axially slidably arranged along the first extraction tank, one end of the intermediate rod extends radially along the first extraction tank to the outside of the first extraction tank and is fixedly connected to the inner ring plate, the other end of the intermediate rod extends through the fixed block along the axial direction of the first extraction tank into the first extraction cavity, and one end of the intermediate rod extending into the first extraction cavity is fixed to the first filter barrel.

[0010] The present invention is further configured as follows: the connecting structure includes a limit groove, an elastic cavity, a sliding block, a limit block and a spring, the limit groove is arranged on the side of the inner ring plate facing the outer ring plate, the elastic cavity is arranged on the side of the outer ring plate facing the inner ring plate, the elastic cavity is opposite to the opening of the limit groove, the sliding block is slidingly arranged in the elastic cavity, the limit block is fixed at one end of the sliding block facing the limit groove, the spring is arranged at one end of the sliding block away from the limit block, the two ends of the spring are respectively fixed to the sliding block and the inner wall of the elastic cavity, the spring applies an elastic force to the sliding block in the direction of the limit groove, the outer side surface of the limit block and the inner wall of the limit groove are both arc surfaces, and the limit block can extend into the limit groove.

[0011] The present invention is further configured as follows: elastic connecting pieces are fixed to the sides of the inner ring plate and the outer ring plate away from the support rod, the elastic connecting piece is arranged around the first extraction tank, one end of the elastic connecting piece is fixed to the inner ring plate, and the other end of the elastic connecting piece is fixed to the outer ring plate.

[0012] By adopting the above technical solution, under normal conditions, the sliding block presses the limit block into the limit groove under the elastic action of the spring. At this time, the limit block and the sliding block provide support force for the inner ring plate and the outer ring plate along the axial direction of the first extraction tank. After the electric push rod is started, it drives the outer ring plate to move axially along the first extraction tank, and drives the inner ring plate to move synchronously through the connecting structure, so that the inner ring plate drives the middle rod to move in the middle cavity, and then drives the first filter barrel to move axially along the first extraction tank, thereby achieving the purpose of adjusting the position of the first filter barrel.

[0013] The present invention is further configured as follows: the air return structure includes a fragrance return pipe, which is fixedly arranged on the outside of the first extraction tank, one end of the fragrance return pipe penetrates the storage tank and extends into the storage cavity, the other end of the fragrance return pipe extends to the side of the first extraction tank away from the storage tank and is fixedly provided with a hose connector, the end of the hose connector away from the fragrance return pipe is plugged with a second air duct, the end of the second air duct away from the hose connector can extend into the second extraction cavity, the fragrance return pipe is connected to a first air duct whose end penetrates the first extraction tank and extends into the first extraction cavity, a closing cover is detachably and fixedly arranged at an opening on the side of the second extraction tank away from the first extraction tank, the closing cover closes the opening on the side of the second extraction cavity away from the first extraction tank, and the extension path of the second air duct penetrates the closing cover and is fixed to the closing cover.

[0014] The present invention is further configured as follows: an annular surrounding sheet is fixedly arranged around the inner wall of the first extraction chamber, the annular surrounding sheet and the inner wall of the first extraction chamber surround each other to form a closed air pressure chamber, a pressure plate is arranged around the inner wall of the first extraction chamber in the air pressure chamber, the pressure plate slides axially along the first extraction tank in the air pressure chamber, a plurality of connecting rods are fixed to the side of the pressure plate facing the storage tank, one end of the connecting rod away from the pressure plate passes through the first extraction tank and extends to the outside of the first extraction tank, one end of the connecting rod extending to the outside of the first extraction tank is fixed to the outer ring plate, the connecting rod passes through the part of the first extraction tank and is sealed, a plurality of vents connected to the first extraction chamber are provided on the side of the annular surrounding sheet away from the connecting rod, and the first air duct is located at the first One end in the extraction chamber is a closed end and is connected to an extended air duct, which extends axially along the first extraction tank through the annular surrounding plate and is inserted into the air pressure chamber. One end of the extended air duct is located in the air pressure chamber and passes through the pressure plate to extend to the side of the air pressure chamber facing the storage tank. The pressure plate is slidably connected to the extended air duct and the connection is sealed. An air intake channel is provided on the side of the inner wall of the first extraction chamber in the air pressure chamber facing the storage tank. The air intake channel extends along the inside of the first extraction chamber wall and is connected to the first extraction chamber at one end. The connection between the air intake channel and the first extraction chamber is located on the side of the first extraction chamber close to the storage tank. Flexible abutment sheets are fixed to the opposite end walls in the air intake channel, and the opposite ends of the flexible abutment sheets abut against each other to close the air intake channel.

[0015] By adopting the above technical scheme, the mixed liquid stored in the storage chamber generates gas with the fragrance of the extract, and the fragrant gas is respectively guided to the hose joint and the first air guide pipe through the return fragrance pipe, and the fragrant gas in the hose joint enters the second extraction chamber through the second air guide pipe, so that the first mixed liquid in the second extraction chamber is fragrant, and the fragrant gas located in the first air guide pipe is introduced into the air pressure chamber through the extended air guide pipe and is stored on the side of the pressure plate facing the storage tank. When the first filter barrel closes the first channel, the first mixed liquid flows into the first extraction chamber and the first filter barrel to extract the material in the first filter barrel, and the electric push rod is started, and the electric push rod drives the outer ring plate to move further toward the storage tank. At this time, since the first filter barrel cannot move, the middle rod cannot move, so that the inner ring plate remains stationary. At the same time, since the inner wall of the limit groove and the outer side surface of the limit block are curved surfaces, when the outer ring plate moves axially along the first extraction tank, the limit block escapes from the limit groove, and the inner ring plate and the outer ring plate are separated The elastic connecting piece is stretched after the inner ring plate and the outer ring plate are misaligned to prevent the outer ring plate and the inner ring plate from being completely separated. Therefore, the outer ring plate can continue to move toward the storage tank without being restricted by the inner ring plate, so that the outer ring plate pulls the pressure plate toward the storage tank through the connecting rod, thereby increasing the spatial pressure of the aroma gas inside the air pressure chamber, and the pressure in the first extraction chamber remains unchanged. The air inlet channel is connected with the air pressure chamber. At this time, the pressure of the part of the air inlet channel connected with the air pressure chamber increases. When the pressure difference between the connecting part of the air inlet channel and the air pressure chamber and the connecting part of the air inlet channel and the first extraction chamber is greater than the elastic deformation force of the flexible abutment sheet, the abutting ends of the two relative flexible abutment sheets disengage from the abutment to allow the air inlet channel to pass through. At this time, the aroma gas enters the first extraction chamber through the air inlet channel, and the aroma gas entering the first extraction chamber is fully mixed with the second mixed liquid, further increasing the material aroma of the second mixed liquid, thereby greatly improving the aroma quality and extraction quality of the mixed liquid after the parent-child segmented extraction.

[0016] An extraction method of a mother-and-child tank type staged extraction device, the extraction method comprising:

[0017] S1: The closing component closes the second channel and the first channel respectively;

[0018] S2: introducing different types of materials into the second extraction chamber and the first extraction chamber in sequence through the feed pipe;

[0019] S3: First, water is introduced into the second extraction chamber through the feed pipe, and the water introduced into the second extraction chamber soaks the material and allows it to stand;

[0020] S4: opening the sealing component to release the sealing of the second channel, so that the water in the second extraction chamber enters the first extraction chamber through the second channel to soak the material;

[0021] S5: opening the sealing component to release the sealing of the first channel by the sealing component, so that the water in the first extraction chamber flows into the storage chamber through the first channel for storage;

[0022] S6: Drain the water in the storage chamber through the drain pipe.

[0023] The beneficial effects of the present invention are as follows: during the entire extraction process, water only needs to be added once to meet the extraction conditions of two different materials, thereby improving the extraction efficiency of both materials and achieving the purpose of extracting different materials under different extraction conditions in stages. At the same time, after the substances in the extraction of the two extraction materials are mixed, the taste of the mixed liquid can be better, thereby improving the extraction efficiency while ensuring the quality and taste of the extraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural cross-sectional view of the present invention;

[0026] Figure 3 It is an exploded view of the local structure of the present invention;

[0027] Figure 4 for Figure 3 A magnified view of the structure at center A;

[0028] Figure 5 It is a partial structural cross-sectional view of the air intake passage in the present invention.

[0029] In the figure: 10, first extraction tank; 11, storage tank; 12, support rod; 13, drive motor; 14, drive shaft; 15, spline shaft; 16, movable shaft; 17, second extraction tank; 18, closing cover; 19, second air guide tube; 20, second fixed tube; 21, fixed plate; 23, second filter barrel; 24, second movable tube; 25, second channel; 26, second extraction chamber; 27, first extraction chamber; 28, first filter barrel; 29, first channel; 30, first movable tube; 31, first fixed tube; 32, fixed block; 33 , storage cavity; 34, discharge pipe; 35, fragrance return pipe; 36, first air duct; 37, extended air duct; 38, hose connector; 39, annular surrounding plate; 40, air pressure cavity; 41, pressure plate; 42, connecting rod; 43, air intake channel; 44, intermediate rod; 45, outer ring plate; 46, inner ring plate; 47, elastic connecting plate; 48, mounting groove; 49, electric push rod; 50, spline groove; 51, limit groove; 52, elastic cavity; 53, sliding block; 54, limit block; 55, spring; 56, flexible abutment plate; 57, intermediate cavity. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0031] like Figures 1 to 3 As shown, a mother-and-child tank type staged extraction device is characterized in that it includes a first extraction tank 10, a storage tank 11, a support rod 12, a second extraction tank 17, a feed pipe and an air return structure. The first extraction tank 10 is hollow inside and one side end of the first extraction tank 10 is penetrated to form a first extraction chamber 27. The storage tank 11 is fixed to the end of the first extraction tank 10 that is not penetrated by the first extraction chamber 27. The storage tank 11 is hollow inside to form a storage chamber 33. The storage chamber 33 is connected to the first extraction chamber 27 and a first channel 29 is formed at the connection. The second extraction tank 17 is arranged on a side of the first extraction chamber 27 away from the storage tank 11. The second extraction tank 17 is inserted into the first extraction chamber 27 and is threadedly connected to the first extraction chamber 27. The second extraction tank 17 is hollow inside and away from the first extraction tank 10. One end penetrates the second extraction tank 17 to form a second extraction chamber 26, and the second extraction chamber 26 is connected to the first extraction chamber 27 to form a second channel 25 at the connection point. The second channel 25 and the first channel 29 are provided with a closing component for closing the second channel 25 and the first channel 29. The feed pipeline is arranged on the second extraction tank 17 and the first extraction tank 10 and is used to pass and extract materials into and out of the second extraction chamber 26 and the first extraction chamber 27. A drain pipe 34 is arranged in the storage chamber 33, and the other end of the drain pipe 34 penetrates the storage tank 11 and extends to the outside of the storage tank 11. The return air structure is arranged on the storage tank 11, and the return air structure makes the storage chamber 33 communicate with the second extraction chamber 26 and the first extraction chamber 27 respectively. A plurality of support rods 12 are provided and fixed on the end face of the storage tank 11 away from the first extraction tank 10.

[0032] like Figure 2As shown, the sealing assembly includes a driving motor 13, a driving shaft 14, a spline shaft 15, a movable shaft 16, a fixing plate 21, a second filter barrel 23, a first filter barrel 28 and a driving structure. The driving structure is arranged between the first extraction tank 10 and the storage tank 11 and the driving structure part extends into the first extraction chamber 27. The first filter barrel 28 is arranged in the first extraction chamber 27 and is connected to the driving structure. The driving structure is used to drive the first filter barrel 28 to move axially along the first extraction tank 10. The first filter barrel 28 can close the connection between the first channel 29 and the first extraction chamber 27. The fixing plate 21 is fixed on the side of the second extraction chamber 26 away from the first extraction tank 10. The second filter barrel 23 is arranged in the second extraction chamber 26. The second filter barrel 23 is coaxially arranged with the first filter barrel 28. The second filter barrel 23 can close the connection between the second channel 25 and the second extraction chamber 26. The movable shaft 16 is arranged in the second extraction chamber 26. The movable shaft 1 The end away from the first extraction tank 10 axially penetrates the fixed plate 21 along the second extraction tank 17 and is threadedly connected to the fixed plate 21, the other end of the movable shaft 16 passes through the second filter barrel 23 and is rotatably connected to the second filter barrel 23, the movable shaft 16 extends to the end of the first extraction tank 10 into the second channel 25 and a spline groove 50 is provided on the end surface, the driving motor 13 is fixed to the side of the storage tank 11 away from the first extraction tank 10, the driving shaft 14 is arranged in the storage chamber 33, one end of the driving shaft 14 passes through the storage tank 11 and is connected to the driving motor 13, the other end of the driving shaft 14 extends to the first extraction chamber 27 and penetrates the first filter barrel 28, the driving shaft 14 is slidably connected to the first filter barrel 28, the driving shaft 14 is coaxially arranged with the movable shaft 16, the spline shaft 15 is fixed to the end of the driving shaft 14 away from the driving motor 13, and the end of the spline shaft 15 away from the driving shaft 14 is inserted into the spline groove 50 and is axially slidably connected to the spline groove 50. The second filter barrel 23 and the first filter barrel 28 can block the material from flowing with the liquid, thereby preventing the material from entering the storage chamber 33 and accumulating to affect the taste of the subsequent extracted liquid.

[0033] In one embodiment, the sealing component may use an external pipe and an electric control valve, the external pipe is respectively fixed to the openings of the second channel 25 and the first channel 29 toward the support rod 12, the electric control valve is fixed to the pipe, and the electric control valve controls the opening and closing of the pipe, thereby completing the sealing effect of the environment of the second extraction chamber 26 and the first extraction chamber 27. When the second extraction chamber 26 needs to be connected to the first extraction chamber 27, the electric control valve located at the second channel 25 is opened, and when the first extraction chamber 27 needs to be connected to the storage chamber 33, the electric control valve located at the first channel 29 is opened.

[0034] like Figures 2 to 3As shown, the feed pipeline includes a second fixed pipe 20, a second movable pipe 24, a first movable pipe 30 and a first fixed pipe 31. The second movable pipe 24 is fixedly connected to the second filter barrel 23, one end of the second movable pipe 24 extends into the second filter barrel 23, and the other end of the second movable pipe 24 is located outside the second filter barrel 23. One end of the second fixed pipe 20 passes through the fixed plate 21 and is plugged into one end of the second movable pipe 24 located in the second filter barrel 23. The other end of the second fixed pipe 20 extends to the outside of the second extraction tank 17. The first movable pipe 30 is fixedly connected to the first filter barrel 28. One end of the first movable pipe 30 extends into the first filter barrel 28, and the other end of the first movable pipe 30 extends into the first extraction chamber 27. One end of the first fixed pipe 31 passes through the first extraction tank 10 and extends into the first extraction chamber 27. The other end of the first fixed pipe 31 is located outside the first extraction tank 10. One end of the first fixed pipe 31 located in the first extraction chamber 27 is plugged into one end of the first movable pipe 30 located in the first extraction chamber 27. The second fixed pipe 20 and the first fixed pipe 31 are connected to an external feeding device, which can introduce different types of materials and water of different temperatures into the second fixed pipe 20 and the first fixed pipe 31. During the movement of the second filter barrel 23 and the first filter barrel 28, the second movable pipe 24 and the first movable pipe 30 can ensure that the pipelines are always in a connected state. The driving structure includes a fixed block 32, an intermediate rod 44, an outer ring plate 45, an inner ring plate 46, a mounting groove 48, an electric push rod 49 and an intermediate cavity 57. The fixed block 32 is fixedly arranged in the first channel 29. The fixed block 32 is penetrated by the extension path of the drive shaft 14. A plurality of through-channels are provided on the fixed block 32 along the extension direction of the drive shaft 14. The intermediate cavity 57 is provided in the fixed block 32, and the intermediate cavity 57 penetrates the first extraction tank 10 in the radial direction. The inner ring plate 46 is sleeved on the outer side of the first channel 29 provided in the first extraction tank 10 and the inner ring plate 46 slides axially along the first extraction tank 10. The outer ring plate 45 is sleeved on the outer side of the inner ring plate 46 away from the first extraction tank 10. A connecting structure is provided between the outer ring plate 45 and the inner ring plate 46. The connecting structure enables The outer ring plate 45 and the inner ring plate 46 move synchronously, a plurality of mounting grooves 48 are provided and are opened on the end surface of the storage tank 11 facing the first extraction tank 10, an electric push rod 49 is fixedly arranged in the mounting groove 48 and the electric push rod 49 is provided with an output end, the output end of the electric push rod 49 is fixedly connected to the outer ring plate 45, the intermediate rod 44 is arranged in the intermediate cavity 57 and the intermediate rod 44 is axially slidably arranged along the first extraction tank 10, one end of the intermediate rod 44 extends radially along the first extraction tank 10 to the outside of the first extraction tank 10 and is fixedly connected to the inner ring plate 46, the other end of the intermediate rod 44 extends through the fixed block 32 along the axial direction of the first extraction tank 10 to the first extraction cavity 27, and one end of the intermediate rod 44 extending into the first extraction cavity 27 is fixed to the first filter barrel 28.

[0035] like Figure 4As shown, the connecting structure includes a limit groove 51, an elastic cavity 52, a sliding block 53, a limit block 54 and a spring 55. The limit groove 51 is arranged on the side of the inner ring plate 46 facing the outer ring plate 45, and the elastic cavity 52 is arranged on the side of the outer ring plate 45 facing the inner ring plate 46. The elastic cavity 52 is opposite to the opening of the limit groove 51. The sliding block 53 is slidably arranged in the elastic cavity 52. ​​The limit block 54 is fixed at one end of the sliding block 53 facing the limit groove 51. The spring 55 is arranged at one end of the sliding block 53 away from the limit block 54. The two ends of the spring 55 are respectively fixed to the sliding block 53 and the inner wall of the elastic cavity 52. ​​The spring 55 applies an elastic force to the sliding block 53 in the direction of the limit groove 51. The outer side surface of the limit block 54 and the inner wall of the limit groove 51 are both arc surfaces, and the limit block 54 can extend into the limit groove 51. An elastic connecting piece 47 is fixed to the sides of the inner ring plate 46 and the outer ring plate 45 away from the support rod 12. The elastic connecting piece 47 is arranged around the first extraction tank 10. One end of the elastic connecting piece 47 is fixed to the inner ring plate 46, and the other end of the elastic connecting piece 47 is fixed to the outer ring plate 45.

[0036] like Figures 3 to 5As shown, the air return structure includes a fragrance return pipe 35, which is fixedly arranged on the outside of the first extraction tank 10, one end of the fragrance return pipe 35 passes through the storage tank 11 and extends into the storage cavity 33, the other end of the fragrance return pipe 35 extends to the side of the first extraction tank 10 away from the storage tank 11 and is fixedly provided with a hose connector 38, the end of the hose connector 38 away from the fragrance return pipe 35 is plugged with the second air guide pipe 19, the end of the second air guide pipe 19 away from the hose connector 38 can extend into the second extraction cavity 26, the fragrance return pipe 35 is connected with the first air guide pipe 36 whose end passes through the first extraction tank 10 and extends into the first extraction cavity 27, the second extraction tank 17 is detachably and fixedly provided with a closing cover 18 at an opening on one side away from the first extraction tank 10, the closing cover 18 closes the opening of the second extraction cavity 26 away from the first extraction tank 10, and the extension path of the second air guide pipe 19 passes through the closing cover 18 and is fixed to the closing cover 18. An annular surrounding piece 39 is fixedly provided around the inner wall of the first extraction chamber 27. The annular surrounding piece 39 and the inner wall of the first extraction chamber 27 surround to form a closed air pressure chamber 40. A pressure plate 41 is provided around the inner wall of the first extraction chamber 27 in the air pressure chamber 40. The pressure plate 41 slides axially along the first extraction tank 10 in the air pressure chamber 40. A plurality of connecting rods 42 are fixed to the side of the pressure plate 41 facing the storage tank 11. One end of the connecting rod 42 away from the pressure plate 41 passes through the first extraction tank 10 and extends to the outside of the first extraction tank 10. One end of the connecting rod 42 extending to the outside of the first extraction tank 10 is fixed to the outer ring plate 45. The connecting rod 42 passes through the first extraction tank 10 and is sealed. The annular surrounding piece 39 is located on the side of the pressure plate 41 away from the connecting rod 42 and is provided with a plurality of vents connected to the first extraction chamber 27. The first air duct 36 is located in the first extraction chamber 27. One end inside is a closed end and is connected to an extended air duct 37. The extended air duct 37 extends axially along the first extraction tank 10, passes through the annular surrounding plate 39 and is inserted into the air pressure chamber 40. One end of the extended air duct 37 located in the air pressure chamber 40 passes through the pressure plate 41 and extends to the side of the air pressure chamber 40 facing the storage tank 11. The pressure plate 41 is slidably connected to the extended air duct 37 and the connection is sealed. An air intake channel 43 is provided on the side of the inner wall of the first extraction chamber 27 in the air pressure chamber 40 facing the storage tank 11. The air intake channel 43 extends along the inside of the wall of the first extraction chamber 27 and one end is connected to the first extraction chamber 27. The connection between the air intake channel 43 and the first extraction chamber 27 is located on the side of the first extraction chamber 27 close to the storage tank 11. Flexible abutment sheets 56 are fixed to the opposite end walls in the air intake channel 43, and the opposite ends of the flexible abutment sheets 56 abut against each other to close the air intake channel 43.

[0037] The two materials are introduced into the second filter barrel 23 and the first filter barrel 28 through the feed pipe for storage. At this time, the second filter barrel 23 closes the second channel 25, and the first filter barrel 28 closes the first channel 29. Since the soaking and extraction temperatures of the two materials are different, the material with high extraction temperature is located in the second filter barrel 23. At this time, high-temperature water is first introduced into the second filter barrel 23 through the feed pipe. After the high-temperature water enters the second filter barrel 23, it soaks the material. The water in the second filter barrel 23 will flow into the second extraction chamber 26 through the second filter barrel 23. At this time, the entire second extraction chamber 26 is full of high-temperature water to extract the material in the first stage. After the specified extraction time, the high-temperature water in the second extraction chamber 26 extracts the material in the second filter barrel 23. At this time, the temperature of the high-temperature water drops to just meet the extraction temperature of the material in the first filter barrel 28. At this time, this part of water is mixed with the extracted components to form a first mixed liquid. Then the driving motor 13 is started to drive the driving shaft 14 and the spline shaft 15 to rotate in sequence, and finally drives the movable shaft 16 to rotate, so that the movable shaft 16 moves away from the first filter barrel 28 under the action of the threaded structure. The first extraction tank 10 moves in the direction of the first extraction tank 10, at this time, the second filter barrel 23 releases the closure of the second channel 25, and the first mixed liquid in the second extraction chamber 26 flows into the first extraction chamber 27 through the second channel 25. The first mixed liquid entering the first extraction chamber 27 will flow into the first filter barrel 28 and soak the material in the first filter barrel 28 to perform the second stage of extraction. After the specified extraction time, the driving structure drives the first filter barrel 28 to move toward the second extraction tank 17. At this time, the first filter barrel 28 releases the closure of the first channel 29, and the first mixed liquid in the first extraction chamber 27 and the components extracted from the material in the first filter barrel 28 are mixed to form a second mixed liquid. The second mixed liquid flows into the storage chamber 33 through the first channel 29 for storage, thereby completing the entire extraction process. During the entire extraction process, only one water addition is required to meet the extraction conditions of two different materials, thereby achieving the purpose of extracting different materials under different extraction conditions in stages. At the same time, after the substances in the two extraction materials are mixed, the taste of the mixed liquid can be better, thereby improving the extraction efficiency while ensuring the quality and taste of the extraction.

[0038] Under normal circumstances, the sliding block 53 presses the limit block 54 under the elastic action of the spring 55 to enter the limit groove 51. At this time, the limit block 54 and the sliding block 53 provide axial support force for the inner ring plate 46 and the outer ring plate 45 along the first extraction tank 10. After the electric push rod 49 is started, it drives the outer ring plate 45 to move axially along the first extraction tank 10, and drives the inner ring plate 46 to move synchronously through the connecting structure, so that the inner ring plate 46 drives the middle rod 44 to move in the middle cavity 57, and then drives the first filter barrel 28 to move axially along the first extraction tank 10, so as to achieve the purpose of adjusting the position of the first filter barrel 28. The mixed liquid stored in the storage chamber 33 generates gas with the aroma of the extract, and the aroma gas is respectively guided to the hose joint 38 and the first air guide pipe 36 through the aroma return pipe 35. The aroma gas in the hose joint 38 enters the second extraction chamber 26 through the second air guide pipe 19, so that the first mixed liquid in the second extraction chamber 26 is scented. The aroma gas in the first air guide pipe 36 is introduced into the air pressure chamber 40 through the extended air guide pipe 37 and is stored on the side of the pressure plate 41 facing the storage tank 11. When the first filter barrel 28 closes the first channel 29, the first mixed liquid is When the liquid flows into the first extraction chamber 27 and the first filter barrel 28 and the material in the first filter barrel 28 is extracted, the electric push rod 49 is started, and the electric push rod 49 drives the outer ring plate 45 to move further toward the storage tank 11. At this time, since the first filter barrel 28 cannot move, the middle rod 44 cannot move, so that the inner ring plate 46 remains stationary. At the same time, since the inner wall of the limiting groove 51 and the outer side surface of the limiting block 54 are curved surfaces, when the outer ring plate 45 moves axially along the first extraction tank 10, the limiting block 54 escapes from the limiting groove 51, and the inner ring plate 46 is separated from the outer ring plate 45. The elastic connecting piece 47 is stretched after the inner ring plate 46 and the outer ring plate 45 are misaligned to prevent the outer ring plate 45 and the inner ring plate 46 from being completely separated. Therefore, the outer ring plate 45 can continue to move toward the storage tank 11 without being restricted by the inner ring plate 46, so that the outer ring plate 45 pulls the pressure plate 41 toward the storage tank 11 through the connecting rod 42, so that the pressure of the space containing the aroma gas in the air pressure chamber 40 increases, the pressure in the first extraction chamber 27 remains unchanged, and the air intake channel 43 is connected with the air pressure chamber 40. At this time, the pressure of the part of the air intake channel 43 connected with the air pressure chamber 40 increases. When the pressure difference between the connecting part of the channel 43 and the air pressure chamber 40 and the connecting part of the air inlet channel 43 and the first extraction chamber 27 is greater than the elastic deformation force of the flexible abutment sheet 56, the abutting ends of the two opposite flexible abutment sheets 56 are disengaged to allow the air inlet channel 43 to pass through. At this time, the aroma gas enters the first extraction chamber 27 through the air inlet channel 43. The aroma gas entering the first extraction chamber 27 is fully mixed with the second mixed liquid, further increasing the material aroma of the second mixed liquid, thereby greatly improving the aroma quality and extraction quality of the mixed liquid after the parent-child segmented extraction.

[0039] After the outer ring plate 45 and the inner ring plate 46 are separated, they need to be reset. The electric push rod 49 starts to push the outer ring plate 45 toward the first extraction tank 10, and finally the limit block 54 abuts against the inner ring plate 46 and pushes the inner ring plate 46 toward the first extraction tank 10. When the inner ring plate 46 abuts against the outer side of the first extraction tank 10 and cannot move further, the first filter barrel 28 reaches the maximum moving distance, and the outer ring plate 45 continues to move. Since the outer side of the limit block 54 is a curved surface, the inner ring plate 46 is The limit block 54 applies a force to retract into the elastic cavity 52. ​​At this time, the spring 55 is compressed, and the limit block 54 moves toward the elastic cavity 52. ​​When the outer side surface of the limit block 54 abuts against the side of the inner ring plate 46 toward the outer ring plate 45, the limit block 54 stops retracting into the elastic cavity 52 and remains stationary. When the limit groove 51 is aligned with the elastic cavity 52, the limit block 54 enters the limit groove 51 under the elastic action of the spring 55, thereby completing the reset connection between the inner ring plate 46 and the outer ring plate 45.

[0040] An extraction method of a mother-and-child tank type staged extraction device, the extraction method comprising:

[0041] S1: The second filter barrel 23 closes the second channel 25, and the first filter barrel 28 closes the first channel 29;

[0042] S2: Different types of materials are sequentially introduced into the second filter barrel 23 and the first filter barrel 28 through the feed pipe;

[0043] S3: water is first introduced into the second filter barrel 23 through the feed pipe, the water introduced into the second filter barrel 23 soaks the material in the second filter barrel 23 and flows into the second extraction chamber 26, and then stands still;

[0044] S4: The driving motor 13 is started, and the driving motor 13 drives the driving shaft 14 to rotate, and drives the movable shaft 16 to rotate through the spline shaft 15. Under the action of the threaded connection between the movable shaft 16 and the fixed plate 21, the movable shaft 16 moves in a direction away from the driving shaft 14, and the second filter barrel 23 releases the sealing of the second channel 25. The water in the second extraction chamber 26 enters the first extraction chamber 27 through the second channel 25 to soak the material in the first filter barrel 28, and then stands still;

[0045] S5: starting the driving structure to enable the first filter barrel 28 to release the seal of the first channel 29, so that the water in the first extraction chamber 27 flows into the storage chamber 33 through the first channel 29 for storage;

[0046] S6: The gas generated by the water in the storage chamber 33 is guided to the hose connector 38 and the first air guide tube 36 through the fragrance return tube 35, and then the gas in the hose connector 38 is introduced into the second extraction chamber 26 through the second air guide tube 19, and the gas in the first air guide tube 36 is finally introduced into the first extraction chamber 27;

[0047] S7: Drain the water in the storage chamber 33 through the drain pipe 34.

[0048] When extracting osmanthus and Longjing tea in stages, the extraction conditions of osmanthus are (100°C water, soaking for 15 minutes), and the extraction conditions of Longjing tea are (75°C water, soaking for 7 minutes). In this case, extraction can be carried out through the mother-and-child tank, osmanthus is introduced into the second filter barrel 23, and Longjing tea is introduced into the first filter barrel 28. After the osmanthus is extracted in the second extraction chamber 26, the osmanthus extract is released into the first extraction chamber 27 through the second channel 25 to continue extracting Longjing tea. After the extraction of Longjing tea is completed, the mixed extract of osmanthus and Longjing tea is released into the storage chamber 33 through the first channel 29 for storage.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A mother-and-child tank type phased extraction device, characterized in that: The invention comprises a first extraction tank (10), a storage tank (11), a support rod (12), a second extraction tank (17), a feed pipe and an air return structure. The first extraction tank (10) has a hollow structure inside and a first extraction chamber (27) is formed by penetrating one end of the first extraction tank (10). The storage tank (11) is fixed to the end of the first extraction tank (10) not penetrated by the first extraction chamber (27). The storage tank (11) has a hollow structure inside to form a storage chamber (33). The storage chamber (33) is connected to the first extraction chamber (27) and a first channel (29) is formed at the connection point. The second extraction tank (17) is arranged on a side of the first extraction chamber (27) away from the storage tank (11). The second extraction tank (17) is inserted into the first extraction chamber (27) and is threadedly connected to the first extraction chamber (27). The second extraction tank (17) has a hollow structure inside and a first extraction chamber (33) is penetrated by one end away from the first extraction tank (10). A second extraction chamber (26) is formed, the second extraction chamber (26) is connected to the first extraction chamber (27) and a second channel (25) is formed at the connection point, a sealing component for closing the second channel (25) and the first channel (29) is provided at the second channel (25) and the first channel (29), a feed pipe is provided on the second extraction tank (17) and the first extraction tank (10) and is used to pass materials into and out of the second extraction chamber (26) and the first extraction chamber (27), a liquid discharge pipe (34) is provided in the storage chamber (33), the other end of the liquid discharge pipe (34) passes through the storage tank (11) and extends to the outside of the storage tank (11), a return air structure is provided on the storage tank (11), and the return air structure enables the storage chamber (33) to be connected to the second extraction chamber (26) and the first extraction chamber (27), respectively, and a plurality of support rods (12) are provided and fixed to the end surface of the storage tank (11) away from the first extraction tank (10).

2. The mother-child tank type phased extraction device according to claim 1, characterized in that: The sealing assembly comprises a driving motor (13), a driving shaft (14), a spline shaft (15), a movable shaft (16), a fixing plate (21), a second filter barrel (23), a first filter barrel (28) and a driving structure, wherein the driving structure is arranged between the first extraction tank (10) and the storage tank (11) and a portion of the driving structure extends into the first extraction chamber (27), the first filter barrel (28) is arranged in the first extraction chamber (27) and connected to the driving structure, and the driving structure is used to drive the first filter barrel (28) to move axially along the first extraction tank (10), and the first extraction tank (10) is driven by the first filter barrel (28). The filter barrel (28) is capable of sealing the connection between the first channel (29) and the first extraction chamber (27); the fixing plate (21) is fixed to a side of the second extraction chamber (26) away from the first extraction tank (10); the second filter barrel (23) is arranged in the second extraction chamber (26); the second filter barrel (23) and the first filter barrel (28) are arranged coaxially; the second filter barrel (23) is capable of sealing the connection between the second channel (25) and the second extraction chamber (26); the movable shaft (16) is arranged in the second extraction chamber (26); the movable shaft (16) is away from the first extraction chamber (10); One end of the extraction tank (10) passes through the fixed plate (21) along the axial direction of the second extraction tank (17) and is threadedly connected to the fixed plate (21); the other end of the movable shaft (16) passes through the second filter barrel (23) and is rotatably connected to the second filter barrel (23); the movable shaft (16) extends toward one end of the first extraction tank (10) into the second channel (25) and has a spline groove (50) on its end surface; the drive motor (13) is fixed to a side of the storage tank (11) away from the first extraction tank (10); the drive shaft (14) is arranged in the storage chamber (33); and the drive shaft One end of the drive shaft (14) passes through the storage tank (11) and is connected to the driving motor (13) by power, the other end of the drive shaft (14) extends into the first extraction chamber (27) and passes through the first filter barrel (28), the drive shaft (14) is slidably connected to the first filter barrel (28), the drive shaft (14) and the movable shaft (16) are coaxially arranged, the spline shaft (15) is fixed to the end of the drive shaft (14) away from the driving motor (13), and the end of the spline shaft (15) away from the drive shaft (14) is inserted into the spline groove (50) and is axially slidably connected to the spline groove (50).

3. The mother-child tank type phased extraction device according to claim 2, characterized in that: The feed pipe comprises a second fixed pipe (20), a second movable pipe (24), a first movable pipe (30) and a first fixed pipe (31); the second movable pipe (24) is fixedly connected to the second filter barrel (23); one end of the second movable pipe (24) extends into the second filter barrel (23); the other end of the second movable pipe (24) is located outside the second filter barrel (23); one end of the second fixed pipe (20) passes through the fixed plate (21) and is plugged into one end of the second movable pipe (24) located in the second filter barrel (23); the other end of the second fixed pipe (20) extends to the second extraction tank (17); ), the first movable tube (30) is fixedly connected to the first filter barrel (28), one end of the first movable tube (30) extends into the first filter barrel (28), the other end of the first movable tube (30) extends into the first extraction chamber (27), one end of the first fixed tube (31) passes through the first extraction tank (10) and extends into the first extraction chamber (27), the other end of the first fixed tube (31) is located outside the first extraction tank (10), and one end of the first fixed tube (31) located in the first extraction chamber (27) is plugged into one end of the first movable tube (30) located in the first extraction chamber (27).

4. The mother-child tank type phased extraction device according to claim 2, characterized in that: The driving structure comprises a fixed block (32), an intermediate rod (44), an outer ring plate (45), an inner ring plate (46), a mounting groove (48), an electric push rod (49) and an intermediate cavity (57). The fixed block (32) is fixedly arranged in the first channel (29). The fixed block (32) is penetrated by the extension path of the driving shaft (14). The fixed block (32) is provided with a plurality of through-channels along the extension direction of the driving shaft (14). The intermediate cavity (57) is provided in the fixed block (32), and the intermediate cavity (57) penetrates the first extraction tank (10) in the radial direction. The inner ring plate (46) is sleeved on the outer side of the first extraction tank (10) where the first channel (29) is provided, and the inner ring plate (46) slides axially along the first extraction tank (10). The outer ring plate (45) is sleeved on the outer side of the inner ring plate (46) away from the first extraction tank (10). A connecting structure is provided between the outer ring plate (45) and the inner ring plate (46). The connecting structure The outer ring plate (45) and the inner ring plate (46) are configured to move synchronously. A plurality of mounting grooves (48) are provided and are opened on the end surface of the storage tank (11) facing the first extraction tank (10). An electric push rod (49) is fixedly arranged in the mounting groove (48) and is provided with an output end. The output end of the electric push rod (49) is fixedly connected to the outer ring plate (45). An intermediate rod (44) is arranged in the intermediate cavity (57) and is slidably arranged along the axial direction of the first extraction tank (10). One end of the intermediate rod (44) extends radially along the first extraction tank (10) to the outside of the first extraction tank (10) and is fixedly connected to the inner ring plate (46). The other end of the intermediate rod (44) extends axially along the first extraction tank (10) through the fixed block (32) to the first extraction cavity (27). One end of the intermediate rod (44) extending into the first extraction cavity (27) is fixed to the first filter barrel (28).

5. The mother-child tank type phased extraction device according to claim 4, characterized in that: The connection structure comprises a limit groove (51), an elastic cavity (52), a sliding block (53), a limit block (54) and a spring (55); the limit groove (51) is provided on the side of the inner ring plate (46) facing the outer ring plate (45); the elastic cavity (52) is provided on the side of the outer ring plate (45) facing the inner ring plate (46); the elastic cavity (52) is opposite to the opening of the limit groove (51); the sliding block (53) is slidably arranged in the elastic cavity (52); the limit block (54) is fixed on the sliding cavity The block (53) faces one end of the limit groove (51), and the spring (55) is arranged at one end of the sliding block (53) away from the limit groove (54). The two ends of the spring (55) are respectively fixed to the sliding block (53) and the inner wall of the elastic cavity (52). The spring (55) applies an elastic force to the sliding block (53) in the direction of the limit groove (51). The outer side surface of the limit block (54) and the inner wall of the limit groove (51) are both arranged in arc surfaces, and the limit block (54) can extend into the limit groove (51).

6. The mother-child tank type staged extraction device according to claim 4, characterized in that: An elastic connecting piece (47) is fixed to the side of the inner ring plate (46) and the outer ring plate (45) away from the support rod (12), and the elastic connecting piece (47) is arranged around the first extraction tank (10), one end of the elastic connecting piece (47) is fixed to the inner ring plate (46), and the other end of the elastic connecting piece (47) is fixed to the outer ring plate (45).

7. The mother-child tank type staged extraction device according to claim 4, characterized in that: The air return structure comprises a fragrance return pipe (35), the fragrance return pipe (35) being fixedly arranged outside the first extraction tank (10), one end of the fragrance return pipe (35) penetrating the storage tank (11) and extending into the storage cavity (33), the other end of the fragrance return pipe (35) extending to a side of the first extraction tank (10) away from the storage tank (11) and being fixedly provided with a hose connector (38), the end of the hose connector (38) away from the fragrance return pipe (35) being plugged into a second air guide pipe (19), and the end of the second air guide pipe (19) away from the hose connector (38) being able to The fragrance return tube (35) is connected to a first air guide tube (36) whose end passes through the first extraction tank (10) and extends into the first extraction chamber (27). A closing cover (18) is detachably fixedly provided at an opening of the second extraction tank (17) on a side away from the first extraction tank (10). The closing cover (18) closes the opening of the second extraction chamber (26) on a side away from the first extraction tank (10). The extension path of the second air guide tube (19) passes through the closing cover (18) and is fixed to the closing cover (18).

8. The mother-child tank type phased extraction device according to claim 7, characterized in that: An annular surrounding sheet (39) is fixedly disposed around the inner wall of the first extraction chamber (27), the annular surrounding sheet (39) and the inner wall of the first extraction chamber (27) surround each other to form a closed air pressure chamber (40), a pressure plate (41) is disposed in the air pressure chamber (40) around the inner wall of the first extraction chamber (27), the pressure plate (41) slides axially along the first extraction tank (10) in the air pressure chamber (40), a plurality of connecting rods (42) are fixed to one side of the pressure plate (41) facing the storage tank (11), and the connecting rods (42) are spaced apart from each other. The end away from the pressure plate (41) passes through the first extraction tank (10) and extends to the outside of the first extraction tank (10); the end of the connecting rod (42) extending to the outside of the first extraction tank (10) is fixed to the outer ring plate (45); the connecting rod (42) passes through the part of the first extraction tank (10) that is sealed; the annular surrounding sheet (39) is located on the side of the pressure plate (41) away from the connecting rod (42) and is provided with a plurality of vents that are connected to the first extraction chamber (27); the first air guide pipe (36) is located in the first extraction chamber (27); 7) is a closed end and is connected to an extended air guide tube (37). The extended air guide tube (37) extends axially along the first extraction tank (10) through the annular surrounding sheet (39) and is inserted into the air pressure chamber (40). One end of the extended air guide tube (37) located in the air pressure chamber (40) passes through the pressure plate (41) and extends to the side of the air pressure chamber (40) facing the storage tank (11). The pressure plate (41) and the extended air guide tube (37) are slidably connected and the connection is sealed. The first extraction chamber (27) in the air pressure chamber (40) is ) is provided with an air inlet channel (43) on the side of the inner wall facing the storage tank (11), the air inlet channel (43) extends along the interior of the wall of the first extraction chamber (27) and one end is connected to the first extraction chamber (27), the connection point between the air inlet channel (43) and the first extraction chamber (27) is located on the side of the first extraction chamber (27) close to the storage tank (11), and flexible abutment sheets (56) are fixed to the opposite end walls in the air inlet channel (43), and the opposite ends of the flexible abutment sheets (56) abut against each other to close the air inlet channel (43).

9. The extraction method according to any one of claims 1 to 8, characterized in that: The extraction method comprises: S1: The sealing component seals the second channel (25) and the first channel (29) respectively; S2: different types of materials are introduced into the second extraction chamber (26) and the first extraction chamber (27) in sequence through the feed pipe; S3: water is first introduced into the second extraction chamber (26) through the feed pipe, and the water introduced into the second extraction chamber (26) soaks the material and allows it to stand; S4: opening the sealing component to release the sealing of the second channel (25), so that the water in the second extraction chamber (26) enters the first extraction chamber (27) through the second channel (25) to soak the material; S5: opening the sealing component, so that the sealing component releases the sealing of the first channel (29), and the water in the first extraction chamber (27) flows into the storage chamber (33) through the first channel (29) for storage; S6: draining the water in the storage chamber (33) through the drain pipe (34).

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