CN113100165B

CN113100165B - Pond bottom dredging device for marine fishery breeding

Info

Publication number: CN113100165B
Application number: CN202110362288.7A
Authority: CN
Inventors: 嵇海旭; 梁秀娟
Original assignee: Guangdong Ocean University
Current assignee: Guangdong Ocean University
Priority date: 2021-04-02
Filing date: 2021-04-02
Publication date: 2021-11-19
Anticipated expiration: 2041-04-02
Also published as: CN113100165A

Abstract

The invention discloses a fishpond bottom dredging device for marine fishery culture, which comprises a ship body, wherein the ship body comprises a sludge chamber, a drainage chamber, a cylinder chamber and a power chamber, the sludge chamber is internally connected with a baffle which divides the sludge chamber into a sludge discharge area and a drying area, a pump is connected above the sludge discharge area, one end of the pump is connected with a sludge suction device, the other end of the pump is connected with a sludge discharge pipe, the other end of the sludge discharge pipe extends into a sludge discharge area, a filter screen is connected and arranged on the side wall of the sludge discharge area at the lower part of the baffle, the two sides of the filter screen are respectively connected with a mud scraping plate and a driving device, the power chamber is internally connected with an electricity storage device and a first motor, the power output end of the first motor is connected with a first hollow connecting rod, the other end of the first connecting rod is internally and hermetically connected with a second motor, and the power output end of the second motor penetrates through the first connecting rod to be connected with a paddle. The invention has the advantages that: the sludge can be drained and the sludge and water are respectively discharged out of the ship body after being separated.

Description

Pond bottom dredging device for marine fishery breeding

Technical Field

The invention relates to the technical field of marine fishery culture instruments, in particular to a fishpond bottom dredging device for marine fishery culture.

Background

China is the first major country of world aquaculture, the output of aquaculture aquatic products accounts for 70% of the world, the density of fries cultured and cultured in a marine fishery pond is generally high, a large amount of granular substances such as excrement, residual bait and the like are deposited at the bottom of the pond, the water body of the pond is deteriorated, the survival rate and the growth speed of the fries can be reduced, the pond bottom dredging mode of the marine fishery culture pond is that fishermen carry a sand pump to enter the pond and pump sludge in the pond to the shore, the fish pond is easy to slip due to the deep water level and low visibility in the pond to cause danger, and the existing pond bottom dredging device for the marine fishery culture can not pump stubborn sludge at the bottom of the pond when the pond is cleaned, the effect of dredging is poor.

Disclosure of Invention

The invention aims to overcome the technical defects and provides a fishpond bottom dredging device for marine fishery culture.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a fishpond bottom dredging device for marine fishery culture comprises a boat body, wherein the boat body comprises a sludge chamber, a drainage chamber, a cylinder chamber and a power chamber, the drainage chamber and the cylinder chamber are positioned between the sludge chamber and the power chamber, the cylinder chamber is positioned below the drainage chamber, a baffle is connected in the sludge chamber and obliquely arranged, the baffle divides the sludge chamber into a sludge discharge area and a drying area, a first pump is connected above the sludge discharge area, one end of the first pump is connected with a sludge suction device, the other end of the first pump is connected with a sludge discharge pipe, the other end of the sludge discharge pipe extends into the sludge discharge area, a filter screen is connected on the side wall of the sludge discharge area at the lower part of the baffle, a sludge scraping plate and a driving device are respectively connected on two sides of the filter screen, the sludge discharge area is communicated with the drainage chamber through the filter screen, a water outlet is connected at the bottom of the drainage chamber, an electric storage device and a first motor are connected in the power chamber, the power output end of the first motor is connected with a first hollow connecting rod, the other end of the first connecting rod is internally and hermetically connected with a second motor, and the power output end of the second motor penetrates through the first connecting rod to be connected with a paddle.

Compared with the prior art, the invention has the advantages that: the setting of hull is convenient for the desilting provides support and retrieve the space, the setting of pump one conveniently absorbs mud, the slope setting of baffle is convenient to be filtered mud and is made silt concentrate on the baffle low place so that the follow-up is arranged to the drying area, the setting of filter screen conveniently filters silt so that discharge unnecessary moisture reduces weight, the setting of mud scraping plate is convenient to carry out preliminary clearance to the filter screen, the setting of power house provides the power of marcing for the hull, and the setting of motor one and motor two makes things convenient for the hull to turn to. The invention can drain the water from the sludge and separate the sludge from the water and then discharge the sludge out of the ship body respectively.

The mud suction device comprises a mud suction pipe, a sleeve and a first telescopic rod, wherein the mud suction pipe is connected to the first pump, the sleeve is rotatably connected to the sleeve, a third motor is hermetically connected to one end, close to the sleeve, of the mud suction pipe, a gear is connected to the power output end of the third motor, a rack meshed with the gear is connected to the outer wall of one end, close to the mud suction pipe, of the sleeve, a plurality of mud crushing knives are connected to the inner wall of the middle of the sleeve, the other end of each mud crushing knife is connected to one side wall of the telescopic rod, the other end of the sleeve is connected to a mud stirring knife, one end of each mud stirring knife is hinged to the sleeve, a second connecting rod is hinged to each mud stirring knife, the other end of the second connecting rod is connected to the power output end of the first telescopic rod, and the telescopic rod is convenient to adjust the angle of the mud stirring knives, so that the mud stirring knives can adapt to different operation conditions; the third motor provides rotating power for the mud stirring knife and the mud crushing knife, and the mud with high hardness is conveniently stirred and crushed, so that the mud suction pipe cannot be blocked.

Furthermore, the mud stirring knife is of an arc-shaped structure protruding outwards, the cutting edge of the mud stirring knife faces outwards, and the arc-shaped design enables mud to enter the middle mud suction pipe after being stirred by the mud stirring knife.

Further, the slope of hacking sword sets up, hacking sword cutting edge orientation stirs the mud sword and is the cockscomb structure, and the slope of hacking sword sets up and the cutting edge of cockscomb structure is convenient further smashes the bold silt.

The drying area is provided with a second telescopic rod in a connected mode on the side wall, the higher end of the baffle is hinged to the side wall of the sludge discharge area, the other end of the baffle is abutted to the side wall of the other side of the sludge discharge area, and the power output end of the second telescopic rod is connected to the lower portion of the middle of the baffle. The inclination angle of the baffle can be conveniently adjusted, and then the movement speed of the sludge can be adjusted.

Further, drive arrangement includes pivot and a plurality of commentaries on classics board, the pivot is rotated and is connected on the lateral wall of drainage chamber, and commentaries on classics board axial equipartition is in the pivot, the connection of pivot one end is equipped with bevel gear one, bevel gear one go up the connection be equipped with bevel gear one meshed bevel gear two, two in-connection of bevel gear are equipped with connecting rod three, connecting rod three passes the drainage chamber lateral wall and connects the mud scraping plate, and silt filters discharge water through the filter screen, and the water-washed drives the pivot rotation on arriving the commentaries on classics board, and the pivot drives bevel gear one and rotates, and bevel gear drives bevel gear two and rotates, and bevel gear two drive the mud scraping plate and rotate.

Further, the scraper length matches with filter screen length, the scraper is the triangular prism structure, and by middle to both sides thickness degressive, the both sides thickness of scraper can more conveniently be scraped filter screen surface silt to prevent piling up.

Furthermore, the height of the bottom of the mud discharging area is higher than that of the driving device, so that the discharged water can impact the rotating plate under the action of gravity to drive the rotating shaft and the rotating plate to rotate.

Further, the cylinder chamber includes cylinder and pump two, the pump two is respectively through pipeline intercommunication cylinder both ends, sliding connection is equipped with the piston board in the cylinder, the connection is equipped with the piston rod on the piston board, the piston rod runs through the cylinder and is equipped with the push pedal that flushes with the drainage chamber lateral wall in the other end connection, the drying zone is kept away from to connect on the lateral wall of push pedal one side and is equipped with the shutter, and the setting up of push pedal is convenient to release the hull with the mud cake after the drying from the shutter.

Further, the pond bottom desilting device for marine fishery culture can further comprise: the controller is used for controlling the working states of the first pump, the first motor, the second motor, the third motor, the first telescopic rod, the second telescopic rod and the second pump; the inner part of the mud suction pipe is divided into two independent areas which are mutually sealed and isolated along the extension direction of the mud suction pipe, one area is a mud suction channel area, the other area is a pipeline area, a control circuit for transmitting control signals is laid in the pipeline area, and the controller is electrically connected with the motor III and the telescopic rod I through the control circuit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a dredging device at the bottom of a fish pond for marine fishery culture.

Fig. 2 is a side structure schematic diagram of the mud suction device.

Fig. 3 is a schematic front structure diagram of the mud suction device.

Fig. 4 is a schematic structural view of the driving device.

Fig. 5 is a side schematic view of the drive device.

The reference numbers illustrate: 1. the sludge drying device comprises a ship body, 2, a sludge chamber, 3, a drainage chamber, 4, a cylinder chamber, 5, a power chamber, 6, a baffle plate, 7, a sludge discharge area, 8, a drying area, 9, a pump I, 10, a sludge discharge pipe, 11, a filter screen, 12, a sludge scraping plate, 13, a driving device, 14, a water discharge opening, 15, an electricity storage device, 16, a motor I, 17, a connecting rod I, 18, a motor II, 19, a blade, 20, a sludge suction device, 21, a sludge suction pipe, 22, a sleeve, 23, a telescopic rod I, 24, a motor III, 25, a gear, 26, a rack, 27, a sludge crushing knife, 28, a piston rod, 29, a sludge stirring knife, 30, a telescopic rod II, 31, a rotating shaft, 32, a rotating plate, 33, a bevel gear I, 34, a bevel gear II, 35, a connecting rod III, 36, a push plate, 37, a cylinder, 38, a piston plate, 39, a connecting rod II, 40 and a pump II.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to the attached drawings 1-5, the fishpond bottom dredging device for marine fishery culture comprises a ship body 1, wherein the ship body 1 comprises a sludge chamber 2, a drainage chamber 3, a cylinder chamber 4 and a power chamber 5, the drainage chamber 3 and the cylinder chamber 4 are positioned between the sludge chamber 2 and the power chamber 5, the cylinder chamber 4 is positioned below the drainage chamber 3, a baffle 6 is connected in the sludge chamber 2, the baffle 6 is obliquely arranged, the baffle 6 divides the sludge chamber 2 into a sludge discharge area 7 and a drying area 8, a pump I9 is connected above the sludge discharge area 7, one end of the pump I9 is connected with a sludge suction device 20, the other end of the pump I is connected with a sludge discharge pipe 10, the other end of the sludge discharge pipe 10 extends into the sludge discharge area 7, the sludge discharge area 7 is connected with a filter screen 11 on the side wall at the lower part of the baffle 6, two sides of the filter screen 11 are respectively connected with a sludge scraping plate 12 and a driving device 13, the sludge discharge area 7 is communicated with the drainage chamber 3 through the filter screen 11, the bottom of the drainage chamber 3 is connected with a drainage port 14, an electricity storage device 15 and a motor I16 are connected and arranged in the power chamber 5, the power output end of the motor I16 is connected with a hollow connecting rod I17, the other end of the connecting rod I17 is internally connected with a motor II 18 in a sealing mode, and the power output end of the motor II 18 penetrates through the connecting rod I17 and is connected with a paddle 19. The hollow inside of the first connecting rod 17 is beneficial to placing the second motor 18.

As shown in fig. 2, the mud suction device 20 comprises a mud suction pipe 21 connected to the pump i 9, a sleeve 22 and a first telescopic rod 23, the mud suction pipe 21 is rotatably connected with the sleeve 22, one end of the mud suction pipe 21, which is close to the sleeve 22, is hermetically connected with a third motor 24, a gear 25 is connected to a power output end of the third motor 24, a rack 26 meshed with the gear 25 is connected to an outer wall of one end of the sleeve 22, which is close to the mud suction pipe 21, a plurality of mud crushing knives 27 are connected to an inner wall of the middle of the sleeve 22, the other ends of the mud crushing knives 27 are connected to a side wall of the first telescopic rod 23, a mud stirring knife 29 is connected to the other end of the sleeve 22, one end of the mud stirring knife 29 is hinged to the sleeve 22, a second connecting rod 39 is hinged to the middle of the mud stirring knife 29, and the other end of the second connecting rod 39 is connected to the power output end of the first telescopic rod 23; the mud stirring knife 29 is of an arc-shaped structure, the cutting edge of the mud stirring knife 29 faces outwards, and the arc-shaped design enables mud to enter the middle mud suction pipe after being stirred by the mud stirring knife 29; the mud crushing knife 27 is obliquely arranged, the cutting edge of the mud crushing knife 27 faces the mud stirring knife 29 and is serrated, and the oblique arrangement of the mud crushing knife 27 and the serrated cutting edge facilitate further crushing of the large mud.

As shown in figure 1, a second telescopic rod 30 is connected to the side wall of the drying area 8, the higher end of the baffle 6 is hinged to the side wall of the sludge discharge area 7, the other end of the baffle 6 is abutted to the side wall of the other side of the sludge discharge area 7, and the power output end of the second telescopic rod 30 is connected to the lower portion of the middle of the baffle 6. The inclination angle of the baffle can be conveniently adjusted, and then the movement speed of the sludge can be adjusted.

As shown in fig. 4 and 5, the driving device 13 includes a rotating shaft 31 and a plurality of rotating plates 32, the rotating shaft 31 is rotatably connected to the side wall of the drainage chamber 3, the rotating plates 32 are axially and uniformly distributed on the rotating shaft 31, one end of the rotating shaft 31 is connected with a first bevel gear 33, the first bevel gear 33 is connected with a second bevel gear 34 engaged with the first bevel gear 33, a third connecting rod 35 is connected in the second bevel gear 34, and the third connecting rod 35 penetrates through the side wall of the drainage chamber 3 and is connected with the mud scraping plate 12; the length of the mud scraping plate 12 is matched with that of the filter screen 11, the mud scraping plate 12 is in a triangular prism structure, the thickness of the mud scraping plate decreases from the middle to two sides, and the mud on the surface of the filter screen can be more conveniently scraped due to the thin thickness of the two sides of the mud scraping plate so as to prevent accumulation; arrange the height that the height in 7 bottoms in mud district is higher than row mud district 7 tops, make things convenient for the discharged water to strike the commentaries on classics board under the action of gravity, drive the pivot and change the board and rotate.

As shown in fig. 1, the cylinder chamber 4 includes a cylinder 37 and a second pump 40, the second pump 40 is respectively communicated with two ends of the cylinder 37 through a pipeline, a piston plate 38 is slidably connected in the cylinder 37, a piston rod 28 is connected on the piston plate 38, the piston rod 28 penetrates through the cylinder 37 and is connected at the other end with a push plate 36 flush with the side wall of the drain chamber 3, and a door is connected on the side wall of the drying region 8 far from the push plate 36. The cylinder 37 has a rod cavity and a rodless cavity, a first air hole is arranged on the wall body of the rod cavity in a penetrating manner, a second air hole is arranged on the wall body of the rodless cavity in a penetrating manner, when compressed air is input into the rodless cavity, the rod cavity exhausts air, and the piston plate 38 is pushed to move by the force formed by the pressure difference between the two cavities of the cylinder acting on the piston plate 38, so that the piston rod 28 extends out; when the rod chamber is filled with air and the rodless chamber is exhausted, the piston rod 28 is retracted, and if the rod chamber and the rodless chamber are alternately filled with air and exhausted, the piston plate 38 performs reciprocating linear motion. The second pump 40 may be an air pump. Alternatively, the piston cylinder may be replaced with a diaphragm cylinder.

In a further embodiment, a controller may be further provided, which is electrically connected to the first pump 9, the power storage device 15, the first motor 16, the second motor 18, the third motor 24, the first telescopic rod 23, the second telescopic rod 30, and the second pump 40, and is configured to obtain electric energy from the power storage device 15, and control respective working states of the first pump 9, the first motor 16, the second motor 18, the third motor 24, the first telescopic rod 23, the second telescopic rod 30, and the second pump 40, including controlling starting, stopping, rotating direction, and rotating speed of each motor, and controlling the telescopic direction and telescopic length of each telescopic rod. The first expansion link 23 and the second expansion link 30 may be electric expansion links (electric push rods), pneumatic expansion links, electric hydraulic push rods, or electromagnetic expansion links. The Linear transmission mechanism electric push rod is also called Linear Actuator, and the electric push rod is an electric driving device which converts the rotary motion of a motor into the Linear reciprocating motion of the push rod. Be provided with the air pressure drive chamber in the pneumatic telescopic link, be provided with the inlet port on the air pressure drive chamber, the high-pressure draught of air supply output can be followed the inlet port and got into the air pressure drive chamber and make pneumatic telescopic link extension, makes pneumatic telescopic link retract through the exhaust. The interior of the sludge suction pipe 21 can be divided into two independent, mutually sealed and isolated areas along the extension direction thereof, one is a sludge suction passage area, and the other is a pipeline area, in which: the control circuit is used for transmitting a control signal, and the controller is electrically connected with the motor III 24 and the telescopic rod I23 through the control circuit; and the power supply circuit is used for transmitting electric energy and electrically connects the first telescopic rod 23 and the third motor 24 with the electric storage device 15 respectively. Further, an air supply pipeline for supplying compressed air to the pneumatic telescopic rod is laid in the pipeline area, the air supply pipeline is communicated with an air pump or an air source arranged in the ship body 1, the air pump is electrically connected with the controller, and the air source can be an air compressor.

When the embodiment of the invention is implemented specifically, an operator starts the second motor 18, the second motor 18 drives the blades 19 to rotate, the blades 19 drive the ship body 1 to advance, the first motor 16 is started, and the first motor 16 enables the first connecting rod 17 to rotate, so that the advancing direction of the blades 19 is controlled; after the ship body 1 is driven to a specified place, the mud suction pipe 21 sinks to the water bottom to clean mud in a specified area, the motor three 24 drives the gear 25 to rotate, the gear 25 drives the rack 26 on the sleeve 22 to rotate, so that the mud stirring knife 29 and the mud crushing knife 27 on the sleeve 22 are driven to rotate, the angle of the mud stirring knife 29 can be adjusted by controlling the extension and retraction of the telescopic rod one 23, the mud enters the mud suction pipe 21 under the action of the pump one 9 and then flows onto the baffle 6 of the mud chamber 2, the mud flows to the lower part of the baffle 6 due to the inclined arrangement of the baffle 6, under the filtration of the filter screen 11, the mud is filtered by the filter screen 11 to discharge water, the water is flushed onto the rotating plate 32 to drive the rotating shaft 31 to rotate, the rotating shaft 31 drives the bevel gear one 33 to rotate, the bevel gear one 33 drives the bevel gear two 34 to rotate, the bevel gear two 34 drives the mud scraping plate 12 to rotate, when the mud is accumulated greatly, the mud can be cleaned by controlling the telescopic rod two 30, the baffle 6 is loosened from abutting against the side wall of the sludge discharge area 7, sludge flows to the drying area 8 to be dried, when the ship body 1 moves to the shore, the air can be filled into the air cylinder 37 through the second pump 40 to realize the movement of the piston plate 38, the piston plate 38 pushes the piston rod 28 to move, the piston rod 28 pushes the push plate 36, and the push plate 36 pushes the dried sludge out of the stop gate.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a pond bottom of pool desilting device is used in marine fishery breed, includes hull (1), its characterized in that: the ship body (1) comprises a sludge chamber (2), a drainage chamber (3), a cylinder chamber (4) and a power chamber (5), the drainage chamber (3) and the cylinder chamber (4) are positioned between the sludge chamber (2) and the power chamber (5), the cylinder chamber (4) is positioned below the drainage chamber (3), a baffle (6) is connected and arranged in the sludge chamber (2), the baffle (6) is obliquely arranged, the sludge chamber (2) is divided into a sludge discharge area (7) and a drying area (8) by the baffle (6), a pump I (9) is connected and arranged above the outer part of the sludge discharge area (7), one end of the pump I (9) is connected with a sludge suction device (20), the other end of the pump I is connected with one end of a sludge discharge pipe (10), the other end of the sludge discharge pipe (10) extends into the sludge discharge area (7), and a filter screen (11) is arranged on the side wall of the sludge discharge area (7) at the lower part of the baffle (6), the two sides of the filter screen (11) are respectively connected with a mud scraping plate (12) and a driving device (13), the mud discharging area (7) is communicated with the drainage chamber (3) through the filter screen (11), the bottom of the drainage chamber (3) is connected with a water outlet (14), an electricity storage device (15) and a motor I (16) are arranged in the power chamber (5), the power output end of the motor I (16) is connected with a hollow connecting rod I (17), the other end of the connecting rod I (17) is connected with a motor II (18) in a sealing manner, and the power output end of the motor II (18) penetrates through the connecting rod I (17) and is connected with a paddle (19);

the mud suction device (20) comprises a mud suction pipe (21), a sleeve (22) and a first telescopic rod (23), the mud suction pipe (21) is rotatably connected with the sleeve (22), one end, far away from the sleeve (22), of the mud suction pipe (21) is connected with a first pump (9), one end, close to the sleeve (22), of the mud suction pipe (21) is provided with a third motor (24) in a sealing connection mode, a gear (25) is connected to the power output end of the third motor (24), the outer wall, close to the mud suction pipe (21), of the sleeve (22) is provided with a rack (26) meshed with the gear (25), the inner wall of the sleeve (22) is provided with a plurality of mud crushing knives (27) in a connecting mode, the other end of each mud crushing knife (27) is connected with the side wall of the first telescopic rod (23), the other end of the sleeve (22) is connected with a mud stirring knife (29), and one end of the mud stirring knife (29) is hinged to the sleeve (22), and a second connecting rod (39) is hinged to the mud stirring knife (29), and the other end of the second connecting rod (39) is connected to the power output end of the first telescopic rod (23).

2. The pond bottom dredging device for marine fishery culture according to claim 1, characterized in that: the mud stirring knives (29) are of arc structures protruding outwards, and the cutting edges of the mud stirring knives (29) face outwards.

3. The pond bottom dredging device for marine fishery culture according to claim 1, characterized in that: the mud crushing knife (27) is obliquely arranged, and the cutting edge of the mud crushing knife (27) faces the mud stirring knife (29) and is serrated.

4. The pond bottom dredging device for marine fishery culture according to claim 1, characterized in that: the drying area (8) is connected on the lateral wall and is equipped with two (30) telescopic links, the higher one end of baffle (6) articulate in arrange on the lateral wall of mud district (7), baffle (6) other end butt arrange on the mud district (7) opposite side lateral wall, the power take off end of two (30) telescopic links connect in baffle (6) middle part below.

5. The pond bottom dredging device for marine fishery culture according to claim 1, characterized in that: drive arrangement (13) include pivot (31) and a plurality of commentaries on classics board (32), pivot (31) rotate connect in on drainage chamber (3) lateral wall, commentaries on classics board (32) are followed the axial extension of pivot (31), and a plurality of commentaries on classics board (32) along circumference equipartition in on pivot (31), pivot (31) one end is connected and is equipped with bevel gear (33), bevel gear (33) go up to connect and is equipped with bevel gear two (34), bevel gear (33) with bevel gear two (34) mesh mutually, bevel gear two (34) in-connection is equipped with connecting rod three (35), connecting rod three (35) pass the lateral wall of drainage chamber (3) is connected scrape mud board (12).

6. The pond bottom dredging device for marine fishery culture according to claim 1, characterized in that: the length of the mud scraping plate (12) is matched with that of the filter screen (11), and the mud scraping plate (12) is of a triangular prism structure and is gradually reduced from the middle to the two sides.

7. The pond bottom dredging device for marine fishery culture according to claim 1, characterized in that: the height of the bottom of the sludge discharge area (7) is higher than that of the driving device (13).

8. The pond bottom dredging device for marine fishery culture according to claim 4, characterized in that: the air cylinder chamber (4) comprises an air cylinder (37) and a second pump (40), the second pump (40) is communicated with the two ends of the air cylinder (37) through pipelines respectively, a piston plate (38) is arranged in the air cylinder (37) in a sliding connection mode, a piston rod (28) is connected to the piston plate (38), the piston rod (28) penetrates through the air cylinder (37) and is connected to the other end of the air cylinder to form a push plate (36) which is flush with the side wall of the drainage chamber (3), and a stop door is connected to the side wall of one side, away from the push plate (36), of the drying area (8).

9. The pond bottom dredging device for marine fishery culture according to claim 8, characterized in that: further comprising: the controller is used for acquiring electric energy from the electric storage device (15) and controlling the working states of the first pump (9), the first motor (16), the second motor (18), the third motor (24), the first telescopic rod (23), the second telescopic rod (30) and the second pump (40) respectively; the mud suction pipe (21) is divided into two independent areas which are sealed and isolated from each other along the extension direction, one area is a mud suction channel area, the other area is a pipeline area, a control circuit used for transmitting control signals is laid in the pipeline area, and the controller is electrically connected with the motor III (24) and the telescopic rod I (23) through the control circuit.