CN116036720A - Marine aquaculture tail water solid-liquid separation device - Google Patents

Abstract

The invention discloses a solid-liquid separation device for mariculture tail water, which belongs to the technical field of solid-liquid separation, and comprises a base, a collection box is arranged on the top of the base, and a separation mechanism for solid-liquid separation of the tail water is arranged on the top of the collection box. The separation mechanism includes The fixed cylinder, the separation assembly for solid-liquid separation of the tail water, the primary backwash assembly for backwashing the separation assembly, and the secondary backwash assembly for assisting the primary backwash assembly, the fixed cylinder is fixed on the collection On the top of the tank, the separation component is set inside the fixed cylinder, the primary backwash component is set between the fixed cylinder and the separation component, and the secondary backwash component is set on the separation component. The present invention cleans the separation assembly by setting a primary backwash assembly and a secondary backwash assembly to ensure the service life and efficiency of the separation assembly. The technical structure can ensure the separation effect while prolonging the service life of the device and saving production costs.

Description

Marine aquaculture tail water solid-liquid separation device

technical field

The invention belongs to the technical field of solid-liquid separation, and in particular relates to a solid-liquid separation device for mariculture tail water.

Background technique

Seawater recirculation aquaculture is fundamentally different from freshwater aquaculture. It is very convenient to replenish water for freshwater aquaculture, while seawater recirculation aquaculture needs to replenish seawater. In order to save water exchange costs, it is usually necessary to recycle the tail water. After the tail water is separated from the solid and liquid, it can realize Resource utilization of biological water purification and solid waste biological fermentation.

At present, the traditional screen-type separation is still used for the solid-liquid separation of the tail water of mariculture. The disadvantage of using this separation method is that the water content of the solid waste is still high, and the high water content means high salt content. It is not conducive to the further biological fermentation and utilization of solid waste.

The Chinese invention patent application with the publication number CN113599897A discloses a solid-liquid separation device for marine aquaculture tail water, including a support frame, a feeding mechanism, a power mechanism, a draining mechanism, a slip ring mechanism, a pressure regulating mechanism and a storage box, and a power mechanism. Including driving motor, driving wheel, transmission belt, driven wheel and stirring rod, the output end of the driving motor is connected with the driving wheel, the driving wheel is connected with the driven wheel through the driving belt, and the stirring rod is installed on the driven wheel; the feeding mechanism includes the feeding hopper and One end of the stirring rod is connected to the driven wheel in the material chamber, and the other end of the stirring rod passes through the material chamber and the draining mechanism in turn and is set in the pressure regulating mechanism; the draining mechanism includes a clean water tank and a draining assembly, and the draining assembly includes a draining plate and an installation The filter cloth on the draining plate; the pressure regulating mechanism includes a discharge pipe and a pressure regulating assembly arranged in the discharge pipe. This patent application can separate the waste better, and the water content of the separated solid waste is low, which is convenient for follow-up Carry out further biological fermentation.

However, there are still some deficiencies in the above patent applications:

1. The device drains and collects the waste water in the waste separately through the draining mechanism, but the filter cartridge used in the draining mechanism is placed vertically, and when the screw rod continuously squeezes the waste, the waste will also flow along the inner wall of the filter cartridge. The bottom moves, and over time, a large amount of waste material accumulates at the bottom of the filter cartridge, which makes the outlet hole at the bottom of the filter cartridge easy to block, resulting in slow filtration efficiency and blockage inside the filter cartridge;

2. The separated solid waste in the device is discharged through the pressure regulating mechanism, but during the discharge process, the spring is constantly pressed against the pressure regulating mechanism, which makes it easy for the pressure regulating mechanism to squeeze the discharged waste to the filter while applying pressure. The outlet of the filter cartridge, and then the outlet of the filter cartridge is blocked.

Contents of the invention

The object of the present invention is to provide a solid-liquid separation device for mariculture tail water to solve the problem that the tail water cannot be effectively separated from solid and liquid.

In order to realize the above-mentioned purpose of the invention, the present invention adopts following technical scheme:

The solid-liquid separation device for mariculture tail water according to the present invention includes a base, a collection box is provided on the top of the base, and a separation mechanism for solid-liquid separation of the tail water is provided on the top of the collection box. The separation mechanism includes a fixed cylinder, a separation assembly for solid-liquid separation of the tail water, a primary backwash assembly for backwashing the separation assembly, and a secondary backwash assembly for assisting the primary backwash assembly. The fixed cylinder is fixed on The top of the collection box, the separation assembly is arranged inside the fixed cylinder, the primary backwash assembly is arranged between the inside of the fixed cylinder and the separation assembly, the secondary backwash assembly is arranged on the separation assembly, and the collection box is provided There are filter components for re-filtering the separated sewage and extrusion components for secondary separation of the separated solid impurities.

Preferably, the separation assembly includes a separation filter cartridge, a screw rod and a first motor, the separation filter cartridge is provided with a feed port, one side of the separation filter cartridge is fixed with a first rotating shaft, and the separation filter cartridge The other side of the cylinder is fixed with a second rotating shaft, the first rotating shaft and the second rotating shaft are both rotated inside the fixed cylinder, the first motor is fixed on the side wall of the fixed cylinder, and the output shaft of the first motor It is fixedly connected with the first rotating shaft, the second rotating shaft extends to the outside of the fixed cylinder, and the outer wall of the second rotating shaft is fixedly provided with a connecting pipe extending to the inside of the collection box, and the inner wall of the separation filter cartridge is provided with a motor, so The output shaft of the motor is connected with the screw rod.

Preferably, the primary backwash assembly includes a cavity opened between the fixed cylinder and the separation filter cylinder and a drive assembly disposed inside the fixed cylinder, the fixed cylinder is provided with a water inlet and a pressure pump, and the fixed cylinder A waste water port is opened at the connection between the interior and the collection box. The drive assembly includes a second motor, a screw and a sealing plate. An empty slot is opened inside the fixed cylinder. It is arranged on one side of the outer wall of the fixed cylinder and the output end of the second motor is fixedly arranged on the screw rod. The moving block is threadedly connected to the screw rod. The sealing plate is fixed on the top of the moving block. A groove for the extension of the sealing plate, a switch is provided on one side of the fixed cylinder.

Preferably, the secondary backwash assembly includes a third motor, a reciprocating screw rod and a brush cover plate, the reciprocating screw rod is rotated inside the cavity, the third motor is arranged on the outer wall side of the fixed cylinder and the second The output ends of the three motors are fixedly arranged with the reciprocating screw rod. The reciprocating screw rod is threadedly connected with a bump. outside the filter cartridge and fixedly connected with the bump.

Preferably, a first chamber and a second chamber are opened inside the collection box, the filter assembly is arranged inside the first chamber, and the extruding assembly is arranged inside the second chamber.

Preferably, the filter assembly includes a filter plate, a screw slide, a fourth motor and a scraper, the filter plate is fixed inside the first chamber, and the screw slide is fixed on the filter plate, so The fourth motor is fixed on one side of the collecting box and the output end cooperates with the screw slide table, and the scraper is arranged on the filter plate and slides with the screw slide table.

Preferably, a scraper is slid on the screw slide table, and two sets of scrapers are arranged symmetrically on the scraper. The scraper includes two connecting plates, a connecting shaft, and several telescopic plate, telescopic rod and brush head, the two connecting plates are symmetrically arranged on the scraper, the connecting shaft is rotated between the two connecting plates, and an auxiliary roller is fixedly connected to the outer wall of the connecting shaft. The lower surface of the auxiliary roller is attached to the filter plate, several telescopic plates are evenly fixed on the connecting shaft, and the telescopic rod is slid in the telescopic plate through the elastic member, and the brush head is fixed to the side wall of the telescopic rod connect.

Preferably, the extruding assembly includes an extruding plate and a baffle plate, the inside of the second chamber is provided with a slot that is slidingly connected with the extruding plate, and the extruding plate and the second chamber are fixed with A plurality of evenly distributed springs, the baffle is fixed on the inner wall of the second chamber and abuts against the extrusion plate, an electric push rod is fixed on the inner wall of the second chamber, and the telescopic movement of the electric push rod The end is connected with the extrusion plate, and the bottom wall of the second chamber is provided with a plurality of evenly arranged drainage holes.

The benefits of the present invention are:

1. The present invention cleans the separation assembly by setting a primary backwash assembly and a secondary backwash assembly to ensure the service life and efficiency of the separation assembly. Compared with the prior art, this technical structure can ensure the separation effect and at the same time extend the device service life and save production cost.

2. In the present invention, by setting the extruding assembly and the filtering assembly, when the impurities are separated from the solid and liquid inside the separation mechanism, the impurities in the liquid are separated again through the filtering assembly, and the moisture in the solid impurities is separated twice through the extruding assembly. Separation, reduce the water content inside the solid impurities and reduce the impurities inside the liquid, so that the solid-liquid separation effect is better.

3. The present invention cleans the filter assembly by setting the scraper, prolongs the service life of the filter assembly, and ensures the filtering effect of the filter assembly.

Description of drawings

The accompanying drawings, which constitute a part of this disclosure, are included to provide a further understanding of the invention, and to make other features, objects and advantages of the invention more apparent. Schematic embodiments of the present invention The accompanying drawings and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the overall structure schematic diagram of the marine aquaculture tail water solid-liquid separation device of the present invention;

Fig. 2 is a sectional view of the solid-liquid separation device for seawater aquaculture tail water of the present invention;

Fig. 3 is a sectional view one of the separation mechanism of the present invention;

Fig. 4 is the second cross-sectional view of the separation mechanism of the present invention;

Fig. 5 is the structural representation of filter assembly of the present invention;

Fig. 6 is a schematic diagram of the enlarged structure at A in Fig. 5 of the present invention;

Fig. 7 is a sectional view of the screw slide table of the present invention.

Explanation of reference signs:

1. Base; 2. Collection box; 21. First chamber; 22. Second chamber; 23. Filter assembly; 231. Filter plate; 232. Screw slide table; 233. Fourth motor; 234. Scraping 235, scraper; 236, connecting plate; 237, expansion plate; 238, expansion rod; 239, brush head; 230, auxiliary roller; 24, extrusion assembly; 241, extrusion plate; 242, baffle plate; 243 , spring; 244, drainage hole; 3, separation mechanism; 31, fixed cylinder; 32, separation assembly; 321, separation filter cartridge; 322, screw rod; 323, first motor; 324, feed port; 325, first Rotating shaft; 326, second rotating shaft; 327, connecting pipe; 33, primary backwash assembly; 331, cavity; 332, driving assembly; 333, water inlet; 334, pressure pump; 335, waste water outlet; 336, the first Two motors; 337, screw rod; 338, sealing plate; 339, groove; 34, secondary backwash assembly; 341, third motor; 342, reciprocating screw rod; 343, brush cover plate; , Chute.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", The orientations or positional relationships indicated by "vertical", "horizontal", "horizontal", and "longitudinal" are based on the orientations or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

Moreover, some of the above terms may be used to indicate other meanings besides orientation or positional relationship, for example, the term "upper" may also be used to indicate a certain attachment relationship or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in this application according to specific situations.

Furthermore, the terms "mounted", "disposed", "provided", "connected", "connected", "socketed" should be interpreted broadly. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediary; internal connectivity. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

As shown in Figures 1 to 7, the solid-liquid separation device for marine aquaculture tail water according to the present invention includes a base 1, a collection box 2 is provided on the top of the base 1, and a collection box 2 is provided on the top of the collection box 2 for solid-liquid separation of the tail water. The separation mechanism 3, the separation mechanism 3 includes a fixed cylinder 31, a separation assembly 32 for solid-liquid separation of the tail water, a primary backwash assembly 33 for backwashing the separation assembly 32, and an auxiliary primary backwash assembly 33 Clean the secondary backwash assembly 34 of the separation assembly 32, the fixed cylinder 31 is fixed on the top of the collection box 2, the separation assembly 32, the primary backwash assembly 33 and the secondary backwash assembly 34 are all located in the fixed cylinder 31, the collection box 2 It is equipped with a filter assembly 23 for secondary filtration of the separated sewage and a squeeze assembly 24 for secondary separation of the separated solid impurities. The impurities in the tail water are separated from the solid and liquid by the separation mechanism 3. After long-term use , to avoid clogging of the separation mechanism 3, use the primary backwash assembly 33 and the secondary backwash assembly 34 to clean the separation assembly 32, ensure the service life and efficiency of the separation assembly 32, and realize solid-liquid separation when impurities are inside the separation mechanism 3 Finally, the impurities in the liquid are separated again by the filter assembly 23, and the moisture in the solid impurities after the primary separation is separated by the extrusion assembly 24, so as to reduce the water content in the solid impurities after solid-liquid separation and reduce the water content in the liquid. of impurities.

When it is necessary to filter the tail water, first open the inlet sealing cover on the fixed cylinder 31, connect the tail water discharge pipe to the feed port 324, and discharge the tail water inside the separation filter cartridge 321. The separation assembly 32 includes the separation filter cartridge 321, The screw rod 322 and the first motor 323, the separation filter cartridge 321 is provided with a feed inlet 324, one side of the separation filter cartridge 321 is fixed with a first rotating shaft 325, and the other side of the separation filter cartridge 321 is fixed with a second rotating shaft 326, the first rotating shaft 325 and the second rotating shaft 326 are all rotated inside the fixed cylinder 31, that is, the first rotating shaft 325 and the second rotating shaft 326 form the central axis for the separation filter cartridge 321 to rotate, and the first motor 323 is fixed It is arranged on the side wall of the fixed cylinder 31 , and the output of the first motor 323 is fixedly connected with the first rotating shaft 325 , and the separation filter cylinder 321 is driven to rotate by the first motor 323 . The second rotating shaft 326 extends to the outside of the fixed cylinder 31, and the outer wall of the second rotating shaft 326 is fixedly provided with a connecting pipe 327 extending to the inside of the collection box 2, and the inner wall of the separation filter cartridge 321 is provided with a motor (not shown in the figure) ), the output shaft of the motor is connected to the screw rod 322 to form a power source for the rotation of the screw rod 322. After the discharge is completed, all the feed inlets are closed, the motor is started to drive the screw rod 322 to rotate, and impurities enter the separation filter cartridge 321 inside, the water source is discharged from the inside of the separation filter cartridge 321 through the filter hole, and the impurities remain inside the separation filter cartridge 321, so that the impurities advance along the threads of the outer wall of the screw rod 322 in sequence, and enter into the Inside of collection box 2.

When the separation filter cartridge 321 is clogged after long-term use, especially directly below the separation filter cartridge 321, due to the gravity factor, the inner bottom wall of the separation filter cartridge 321 accumulates more impurities, so that the sieve holes are more seriously blocked. 33 includes a cavity 331 opened between the fixed cylinder 31 and the separation filter cartridge 321 and a drive assembly 332 inside the fixed cylinder 31. The fixed cylinder 31 is provided with a water inlet 333 and a pressure pump 334. The interior of the fixed cylinder 31 and the collection box 2. A waste water port 335 is opened at the joint, and the driving assembly 332 includes a second motor 336, a screw 337 and a sealing plate 338. There is an empty slot inside the fixed cylinder 31, and the screw rod 337 is rotated inside the empty slot. The second motor 336 is located in the fixed One side of the outer wall of the barrel 31 and the output end of the second motor 336 is fixedly arranged with the screw rod 337, the screw rod 337 is threadedly connected with a moving block, the sealing plate 338 is fixedly arranged on the top of the moving block, and the fixed barrel 31 is provided with a space communicating with the empty groove and for supplying The groove 339 extended by the sealing plate 338 is provided with a switch on one side of the fixed cylinder 31, so that when the separation filter cartridge 321 needs to be cleaned, the second motor 336 is started to drive the screw rod 337 to rotate, so that the screw rod 337 drives the moving block to move, so that The sealing plate 338 on the moving block moves inside the empty groove under the limit of the empty groove, so that the sealing plate 338 moves out of the groove 339 to seal the waste water port 335, and when the sealing plate 338 abuts against the waste water port 335 side, One end of the sealing plate 338 will press against the switch and start the switch. The switch transmits the signal to the first motor 323 and then starts the first motor 323. The first motor 323 drives the separation filter cartridge 321 to rotate by 180 degrees, so that the filter at the bottom position The hole is transferred to the top. At this moment, water is injected into the cavity 331 through the water inlet 333, and pressure is injected into the cavity 331 through the pressure pump 334. The inside of the separation filter cartridge 321 is blocked, so that the cavity 331 and the separation filter cartridge There is a pressure difference inside the 321, and the pressurized water will eventually push impurities into the inside of the separation filter cartridge 321 to clean the filter holes.

Secondly, in order to make the cleaning effect better, the secondary backwash assembly 34 includes a third motor 341, a reciprocating screw mandrel 342 and a brush cover plate 343, the reciprocating screw mandrel 342 is rotated inside the cavity 331, and the third motor 341 is located on the inside of the cavity 331. One side of the outer wall of the fixed cylinder 31 and the output end of the third motor 341 are fixedly arranged with the reciprocating screw mandrel 342. The reciprocating screw mandrel 342 is threadedly connected with a bump 344, and the inner wall of the fixed cylinder 31 is provided with a chute 345 that is slidably matched with the bump 344. The brush cover plate 343 is slidingly sleeved on the outside of the separation filter cartridge 321 and is fixedly connected with the projection 344, and the third motor 341 is started to drive the reciprocating screw rod 342 to rotate, thereby driving the projection 344 to reciprocate slide inside the chute 345, further making the brush The brush cover plate 343 accelerates the cleaning of the outer wall of the separation filter cartridge 321, so that the cleaning effect is better. The water source enters the inside of the collection box 2 through the waste water port 335, and impurities enter the inside of the collection box 2 through the screw rod 322.

Fixed particles still exist in the liquid impurities after solid-liquid separation, and liquid still exists in the solid impurities. The solid-liquid separation is realized twice inside the first chamber 21 and the second chamber 22, and a first chamber is opened inside the collection box 2 21 and the second chamber 22 , the filter assembly 23 is located inside the first chamber 21 , and the extruding assembly 24 is located inside the second chamber 22 .

After the waste water enters the first chamber 21, the filter assembly 23 includes a filter plate 231, a screw mandrel slide 232, a fourth motor 233 and a scraper 234, the filter plate 231 is fixed inside the first chamber 21, and the screw mandrel The slide table 232 is fixed on the filter plate 231, the fourth motor 233 is fixed on one side of the collection box 2 and the output end cooperates with the screw mandrel slide table 232, and the scraper 234 is arranged on the filter plate 231 and slides with the screw mandrel. The table 232 is slidably matched, and the waste water after primary filtration is separated through the filter plate 231 , so that the particles in the waste water remain on the filter plate 231 .

Secondly, the filter holes of the filter plate 231 can be cleaned by the scraper 234. Compared with the prior art, where the filter plate is frequently disassembled and replaced, the production cost of this technical solution is lower, and the sliding on the screw slide table 232 A scraper 235 is provided, and two sets of scraper 234 are arranged symmetrically on both sides of the scraper 235. Each set of scraper 234 includes two connecting plates 236, connecting shafts, several telescopic plates 237, and telescopic rods. 238 and brush head 239, two connecting plates 236 are arranged at intervals on the scraper 235, and the connecting shaft is rotated between the two connecting plates 236, and an auxiliary roller 230 is fixedly connected to the outer wall of the connecting shaft, and the auxiliary roller The lower surface of 230 is attached to the filter plate 231 so that when the scraper 235 moves, the auxiliary roller 230 can roll and rub against the filter plate 231 so that the connecting shaft can rotate synchronously, and several telescopic plates 237 are uniformly fixed on the connection on the shaft, and the telescopic rod 238 is slid in the telescopic plate 237 through the elastic member, the brush head 239 is fixedly connected with the side wall of the telescopic rod 238, and the fourth motor 233 is started to drive the screw rod slide 232 to operate, thereby driving the scraper 235 to filter plate 231 for cleaning, in order to avoid blockage inside the filter hole, when the scraper 235 moves, the telescopic plate 237 rotates continuously through the connecting shaft, so that the brush head 239 abuts against the filter hole through the elastic part inside the telescopic plate 237 to squeeze Press clean.

Secondly, the extruding assembly 24 includes an extruding plate 241 and a baffle plate 242. A slot for sliding connection with the extruding plate 241 is provided inside the second chamber 22. A plurality of evenly distributed springs 243, the baffle plate 242 is fixed on the inner wall of the second chamber 22 and abuts against the extrusion plate 241, an electric push rod is fixedly arranged on the inner wall of the second chamber 22, and the electric push rod is fixed on the inner wall of the second chamber 22. The telescopic end of the rod is connected to the extruding plate 241, and the bottom wall of the second chamber 22 is provided with a plurality of evenly arranged drainage holes 244. When solid impurities enter the second chamber 22 through the connecting pipe 327, the electric pusher The rod intermittently pushes the extruding plate 241 to reciprocate, and under the pressure of the extruding plate 241, the water source in the solid impurities is continuously flowed out from the drain hole 244, and the bottom of the drain hole 244 can be connected to collecting equipment such as pipes.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc., should be included within the protection scope of the present invention.

Claims (8)

1. A solid-liquid separation device for mariculture tail water, comprising a base (1), characterized in that: a collection box (2) is provided on the top of the base (1), and a collection box (2) is provided on the top of the collection box (2). A separation mechanism (3) for solid-liquid separation of tail water, the separation mechanism (3) includes a fixed cylinder (31), a separation component (32) for solid-liquid separation of tail water, a separation component (32 ) a primary backwash assembly (33) for backwashing and a secondary backflush assembly (34) for assisting the primary backwash assembly (33), the fixed cylinder (31) is fixed on the top of the collection box (2), The separation component (32) is set inside the fixed cylinder (31), the primary backwash component (33) is set between the fixed cylinder (31) and the separation component (32), and the secondary backwash component ( 34) Set on the separation assembly (32), the collection box (2) is equipped with a filter assembly (23) for re-filtering the separated sewage and an extrusion assembly for secondary separation of the separated solid impurities (twenty four). 2. The solid-liquid separation device for marine aquaculture tail water according to claim 1, characterized in that: the separation assembly (32) includes a separation filter cartridge (321), a screw rod (322) and a first motor (323), The separation filter cartridge (321) is provided with a feed inlet (324), one side of the separation filter cartridge (321) is fixed with a first rotating shaft (325), and the other side of the separation filter cartridge (321) The second rotating shaft (326) is fixed, the first rotating shaft (325) and the second rotating shaft (326) are both rotated inside the fixed cylinder (31), and the first motor (323) is fixed on the The side wall of the fixed cylinder (31), and the output shaft of the first motor (323) is fixedly connected with the first rotating shaft (325), the second rotating shaft (326) extends out of the fixed cylinder (31), and the second rotating shaft The outer wall of the shaft (326) is fixed with a connecting pipe (327) extending to the inside of the collection box (2), the inner wall of the separation filter cartridge (321) is provided with a motor, and the output shaft of the motor is connected to the screw rod (322 )connect. 3. The solid-liquid separation device for mariculture tail water according to claim 2, characterized in that: the primary backwash assembly (33) includes a space between the fixed cylinder (31) and the separation filter cartridge (321). Cavity (331) and the driving assembly (332) arranged inside the fixed cylinder (31). The fixed cylinder (31) is provided with a water inlet (333) and a pressure pump (334). The inside of the fixed cylinder (31) A waste water port (335) is opened at the connection with the collection box (2), the drive assembly (332) includes a second motor (336), a screw (337) and a sealing plate (338), and the inside of the fixed cylinder (31) There is an empty slot, the screw (337) rotates inside the empty slot, the second motor (336) is located on one side of the outer wall of the fixed cylinder (31) and the output end of the second motor (336) is connected to the screw (337) Fixed setting, the screw rod (337) is screwed with a moving block, the sealing plate (338) is fixed on the top of the moving block, and the fixed cylinder (31) is provided with a sealing plate (338) that communicates with the empty groove and supplies the sealing plate (338). An extended groove (339), a switch is provided on one side of the fixed cylinder (31). 4. The solid-liquid separation device for mariculture tail water according to claim 3, characterized in that: the secondary backwash assembly (34) includes a third motor (341), a reciprocating screw rod (342) and a brush cover plate (343), the reciprocating screw rod (342) is installed inside the cavity (331) for rotation, the third motor (341) is installed on one side of the outer wall of the fixed cylinder (31) and the output end of the third motor (341) Fixed with the reciprocating screw rod (342), the reciprocating screw rod (342) is threaded with a bump (344), and the inner wall of the fixed cylinder (31) is provided with a chute ( 345), the brush cover plate (343) is slidably sleeved on the outside of the separation filter cartridge (321) and fixedly connected with the protrusion (344). 5. The solid-liquid separation device for mariculture tail water according to claim 1, characterized in that: a first chamber (21) and a second chamber (22) are opened inside the collection box (2), and the The filtering assembly (23) is arranged inside the first chamber (21), and the extruding assembly (24) is arranged inside the second chamber (22). 6. The solid-liquid separation device for marine aquaculture tail water according to claim 5, characterized in that: the filter assembly (23) includes a filter plate (231), a screw slide (232), a fourth motor (233) and scraper (234), the filter plate (231) is fixed inside the first chamber (21), and the screw slide (232) is fixed on the filter plate (231), the fourth motor (233) is fixed on one side of the collection box (2) and the output end cooperates with the screw slide (232), and the scraper (234) is arranged on the filter plate (231) and is connected with the screw slide ( 232) Slip fit. 7. The solid-liquid separation device for marine aquaculture tail water according to claim 6, characterized in that: a scraper (235) is provided for sliding on the screw slide table (232), and a scraper (234) is provided There are two groups and are arranged symmetrically on the scraper (235), and the scraper (234) includes two connecting plates (236), connecting shafts, several telescopic plates (237), telescopic rods (238) and brush heads (239), the two connecting plates (236) are symmetrically arranged on the scraper (235), the connecting shaft is rotated between the two connecting plates (236), and the outer wall of the connecting shaft is fixedly connected with Auxiliary roller (230), the lower surface of the auxiliary roller (230) is attached to the filter plate (231), several telescopic plates (237) are evenly fixed on the connecting shaft, and the telescopic rod (238) The brush head (239) is fixedly connected with the side wall of the telescopic rod (238) through the elastic member slidingly arranged in the telescopic plate (237). 8. The solid-liquid separation device for mariculture tail water according to claim 5, characterized in that: the extruding assembly (24) includes an extruding plate (241) and a baffle (242), and the second chamber (22) There is a slot for sliding connection with the extruding plate (241) inside, and a plurality of evenly distributed springs (243) are fixed between the extruding plate (241) and the second chamber (22), The baffle plate (242) is fixed on the inner wall of the second chamber (22) and abuts against the extrusion plate (241), and an electric push rod is fixedly arranged on the inner wall of the second chamber (22). The telescopic end of the electric push rod is connected to the extruding plate (241), and the bottom wall of the second chamber (22) is provided with a plurality of evenly arranged drainage holes (244).

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