A water purification system and method for high-density crayfish farming

Abstract

The present invention relates to the technical field of crayfish breeding, and more specifically, to a high-density crayfish breeding water quality purification system and method. The present invention provides a high-density crayfish breeding water quality purification system and method that can improve water quality, including a retention frame, a primary filter screen, a secondary filter screen and an isolation plate, a primary filter screen is arranged inside the retention frame, the primary filter screen is located at the right position of the retention frame, a secondary filter screen is arranged on the left side of the retention frame, and an isolation plate is arranged between the secondary filter screen and the retention frame. The present invention performs three filtrations on the water quality in the water area through the primary filter screen, the secondary filter screen and the adsorption cotton, and then the chemical treatment agent is added to the treated water in the retention frame through the material frame, so that the water flow can achieve a more effective purification effect through successive filtration and chemical reaction, thereby further improving the environment of the crayfish breeding water system.

Description

Technical Field

[0001] The present invention relates to the technical field of crayfish breeding, and in particular to a water purification system and method for high-density crayfish breeding. Background Art

[0002] Crayfish is an arthropod of the genus Procambarus in the family Chelicerae of the order Decapoda. Crayfish have a hard shell and their body colors include red, reddish brown, and pink. Their backs are dark red. Crayfish meat is delicious and high in protein, making it an animal food with high nutritional value.

[0003] There are three important factors in the breeding of aquatic products such as fish and shrimp. These three factors are the breeding density of aquatic products, the amount of feed fed and the change of water quality. The three factors are interdependent and mutually restrictive. This relationship determines the complexity and difficulty of the water quality of the breeding pond. The same is true for the breeding of crayfish. During the breeding of shrimp seedlings, the water needs to be changed once every 7 days, and the water change volume is 20%. The water quality needs to be kept fertile, active and of good quality. These factors affect the survival rate and yield of crayfish. However, due to the rapid reproduction rate of crayfish, the density layout of crayfish in the pond shows a continuous growth trend. The debris produced by aquatic products and the floating objects generated by the reproduction of the water system continue to accumulate in the water body. Over time, the debris in the pond is difficult to clean, which affects the development environment of the water system of the pond, and then affects the breeding of crayfish.

[0004] Therefore, in summary, a water purification system and method for high-density crayfish farming that can improve water quality is proposed. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a water purification system and method for high-density crayfish farming that can improve water quality.

[0006] In order to solve the above technical problems, a water purification system for high-density crayfish breeding is provided, including a retention frame, a primary filter, a secondary filter, an isolation plate, an inlet pipe, an outlet pipe, a feeding mechanism, a winding roller and an adsorption cotton. A primary filter is arranged inside the retention frame, the primary filter is located at the right side of the retention frame, a secondary filter is arranged on the left side of the retention frame, an isolation plate is arranged between the secondary filter and the retention frame, a water inlet pipe is arranged at the right end of the retention frame, a water outlet pipe is arranged at the left end of the retention frame, and a top of the retention frame is provided with a water filter. A material unloading mechanism is provided, and a winding roller is rotatably provided between the two sides inside the retention frame, the winding roller is located between the isolation plate and the retention frame, adsorption cotton is rotatably provided on the winding roller, and an empty groove is opened on the retention frame above the adsorption cotton, and the empty groove is adapted to the adsorption cotton; the material unloading mechanism includes an arch frame, an outer shell and a material frame, an arch frame is provided on the top right side of the retention frame, two outer shells are provided between the arch frame and the retention frame, a material frame is rotatably sleeved inside the outer shell, and two ends of the material frame are rotatably connected to the arch frame and the retention frame respectively.

[0007] In addition, it is particularly preferred that it also includes bevel gear I, bevel gear II and a double-axis motor, bevel gear I is provided at the left end of the two material frames, a double-axis motor is installed on the left part of the retention frame, bevel gear II is provided on the two output shafts of the double-axis motor, and bevel gear II is meshed with the bevel gear I close to it.

[0008] In addition, it is particularly preferred that the present equipment also includes a circulation mechanism, which includes: a roller frame I, a pulley group, a connecting piece, a torsion spring, a connecting rod and a roller frame II, a roller frame I is rotatably arranged on the left side of the top of the retention frame, a pulley group is arranged between the axis of the roller frame I and the output shaft of the double-axis motor, and the roller frame I is coordinated with the adsorption cotton winding type, connecting pieces are arranged on both sides of the retention frame below the two axes of the double-axis motor, a connecting rod is rotatably arranged in the connecting piece through a torsion spring, a roller frame II is rotatably arranged between the two connecting rods, and the roller frame II is located above the roller frame I.

[0009] In addition, it is particularly preferred that a sensor and a floating member are further included, the front side of the retention frame is provided with a sensor, the sensor is electrically connected to the dual-axis motor, and a floating member is slidably provided on the sensor.

[0010] In addition, it is particularly preferred that the device also includes a cleaning mechanism, which includes: a scraper frame, a scraper bar and an intercepting bucket, the scraper frame is slidably arranged on the inner bottom of the retention frame, and the scraper bar is arranged on the top of the scraper frame; an intercepting bucket is arranged on the water inlet pipe.

[0011] In addition, it is particularly preferred that the scraper frame is divided into three parts, each part is placed in three compartments formed by the primary filter screen and the secondary filter screen, and the scraper strips are in sliding contact with the surfaces of the primary filter screen and the secondary filter screen respectively.

[0012] Furthermore, it is particularly preferred that the pore size of the primary filter is larger than the pore size of the secondary filter.

[0013] A method for using a water purification system for high-density crayfish farming comprises the following steps:

[0014] S1. First, place the water inlet pipe in the water area that needs to be purified. The water flows into the retention frame through the water inlet pipe. During the extraction of treated water, the interception bucket blocks the water products. The treated water passes through the primary filter and then the secondary filter for filtration. Finally, the adsorption cotton absorbs the impurities in the water that cannot be filtered, completing the three-level filtration work.

[0015] S2, then start the double-axis motor to drive the bevel gear II to rotate, and the bevel gear II meshes with the bevel gear I to rotate, and then drives the material frame to rotate, and the chemical treatment agent is put into the water flow along with the rotation of the material frame, and the treated water undergoes a chemical reaction, and some debris generates sediment and is placed at the bottom of the retention frame;

[0016] S3. While the dual-axis motor is operating, it drives the pulley group to rotate and then drives the roller frame I to rotate, and the used adsorbent cotton in the retention frame is extracted upward in a cycle to complete the replacement of the old and new adsorbent cotton. At the same time, the roller frame II clamps the upper part of the adsorbent cotton to assist in the extraction of the adsorbent cotton.

[0017] S4. The position of the floating part changes according to the water level in the retention frame. The sensor sends a signal through the position of the floating part to change the frequency of the dual-axis motor. When the water level is too high, the frequency of the dual-axis motor is increased, so that the rotation speed of the material frame and the roller frame I becomes faster, thereby accelerating the overall purification process; when the water level is low, the frequency of the dual-axis motor is slowed down, and the opposite operation is performed in summary;

[0018] S5. After the above process, the treated water finally enters the new water area through the outlet pipe. When the water in the retention frame is drained, the sediment inside reaches a certain accumulation amount. The scraper frame is pulled to scrape and discharge the sediment at the bottom. At the same time, the scraper bar scrapes the debris on the surface of the primary filter and the secondary filter.

[0019] The present invention overcomes the shortcomings of the prior art and can achieve the following beneficial effects:

[0020] 1. The present invention filters the water quality in the water area three times through a primary filter screen, a secondary filter screen and adsorption cotton, and then puts a chemical treatment agent into the treated water in the retention frame through a material frame, so that the water flow can achieve a more effective purification effect through successive filtering and chemical reactions, thereby further improving the environment of the crayfish breeding water system;

[0021] 2. The present invention drives the pulley group to rotate through a dual-axis motor, thereby driving the roller frame I to rotate counterclockwise, so that the roller frame I extracts the used adsorbent cotton outward, thereby achieving the effect of cyclic replacement of the adsorbent cotton;

[0022] 3. The present invention detects the water level of the retention frame through a floating member, and then transmits the signal to the double-axis motor through the sensor, so as to change the frequency of the double-axis motor according to the change of the water level, so that the speed of feeding the chemical treatment agent and extracting the adsorption cotton can be controlled, so as to achieve the effect of controlling the water purification process;

[0023] 4. The present invention scrapes and discharges the sediment at the bottom of the retention frame by pulling out the scraper frame, and then drives the scraper bar to scrape the surface debris of the primary filter and the secondary filter, so that the overall cleanliness of the device is guaranteed and the control of water quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 It is a three-dimensional structural schematic diagram of components such as the primary filter screen, the secondary filter screen and the isolation plate of the present invention.

[0026] Figure 3 It is a three-dimensional structural schematic diagram of the components such as the arch frame, the shell and the material frame of the present invention.

[0027] Figure 4 It is a three-dimensional structural schematic diagram of the parts of the blanking mechanism of the present invention.

[0028] Figure 5 It is a three-dimensional structural schematic diagram of the housing and the material frame of the present invention.

[0029] Figure 6 It is a three-dimensional structural schematic diagram of the circulating mechanism parts of the present invention.

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of A of the present invention.

[0031] Figure 8 It is a schematic diagram of the enlarged three-dimensional structure of point A of the present invention.

[0032] Fig. 9 It is a schematic diagram of the three-dimensional structure of B of the present invention.

[0033] Fig.10 It is a schematic diagram of the enlarged three-dimensional structure of point B of the present invention.

[0034] Fig.11 It is a three-dimensional structural schematic diagram of components such as the retention frame and the scraping frame of the present invention.

[0035] Fig.12 It is a schematic diagram of the three-dimensional structure of the scraping frame and the scraping strip of the present invention.

[0036] The marks in the accompanying drawings provided by the present invention are: 1. retention frame, 101. primary filter screen, 102. secondary filter screen, 103. isolation plate, 2. water inlet pipe, 3. water outlet pipe, 4. material unloading mechanism, 41. arch frame, 42. outer shell, 43. material frame, 44. bevel gear I, 45. bevel gear II, 46. double-axis motor, 5. winding roller, 51. adsorption cotton, 6. circulation mechanism, 61. roller frame I, 62. pulley group, 63. connecting part, 64. torsion spring, 65. connecting rod, 66. roller frame II, 7. sensor, 71. floating part, 8. cleaning mechanism, 81. scraping frame, 82. scraping strip, 9. intercepting bucket. DETAILED DESCRIPTION

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0038] In addition, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. It should be noted that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] Embodiment: A water purification system for high-density crayfish farming, such as Figure 1-Figure 3 , Figure 5 and Figure 6As shown, it includes a retention frame 1, a primary filter screen 101, a secondary filter screen 102, a separation plate 103, an inlet pipe 2, an outlet pipe 3, a feeding mechanism 4, a winding roller 5 and an adsorption cotton 51. The retention frame 1 is in a hollow state and is used to store the pond water to be purified. The retention frame 1 is provided with a primary filter screen 101 inside, and the primary filter screen 101 is located at the right position of the retention frame 1. The retention frame 1 is provided with a secondary filter screen 102 on the left side. The aperture of the secondary filter screen 102 is smaller than that of the primary filter screen 101. The primary filter screen 101 is used to filter larger debris in the water, and the secondary filter screen 102 is used to filter smaller debris. The filter screen is formed to filter and purify the filterable impurities in the water. An isolation plate 103 is arranged between the secondary filter screen 102 and the retention frame 1. The isolation plate 103 is provided with holes for circulating the filtered pond water. An inlet pipe 2 is arranged at the right center of the retention frame 1. The inlet pipe 2 is used to extract pond water and circulate the water into the retention frame 1. An outlet pipe 3 is arranged at the left center of the retention frame 1. The outlet pipe 3 is used for circulating and discharging the purified water. A feeding mechanism 4 is arranged on the top of the retention frame 1. The feeding mechanism 4 is used for feeding the chemical treatment agent for treating the water, and the two sides of the retention frame 1 are arranged inside. A winding roller 5 is rotatably arranged in the middle, a compartment is opened on the left side of the inner bottom of the retention frame 1, the compartment is placed between the retention frame 1 and the isolation plate 103, and the winding roller 5 is located in the compartment. An adsorption cotton 51 is rotatably arranged on the winding roller 5. The adsorption cotton 51 is activated carbon cotton, which can adsorb impurities that cannot be filtered in the water, and the adsorption cotton 51 is in an upward extraction state after passing through the winding roller 5. The adsorption cotton 51 is exposed outside the compartment so that it can contact with the pond water, and an empty groove is opened on the retention frame 1 above the adsorption cotton 51. The empty groove is adapted to the shape of the adsorption cotton 51 and is the extraction point of the adsorption cotton 51, so that the used adsorption cotton 51 can be used. The cotton 51 is extracted outward to form a cyclic replacement; the feeding mechanism 4 includes an arch frame 41, an outer shell 42 and a material frame 43. The arch frame 41 is arranged on the right side of the top of the retention frame 1, and two outer shells 42 are arranged between the arch frame 41 and the retention frame 1. The bottom of the outer shell 42 is provided with a feeding hole groove for the delivery of chemical treatment agents. The inner part of the outer shell 42 is rotatably sleeved with a material frame 43, and the two ends of the material frame 43 are rotatably connected to the arch frame 41 and the retention frame 1 respectively. The material frame 43 is used to place the chemical treatment agent and cooperates with the outer shell 42 to complete the rotary feeding, thereby completing a regular and intermittent feeding operation.

[0040] like Figure 4 As shown, it also includes a bevel gear I 44, a bevel gear II 45 and a double-axis motor 46. The left ends of the two material frames 43 are each provided with a bevel gear I 44. The middle position of the left side of the retention frame 1 is fixedly installed with a double-axis motor 46. The double-axis motor 46 is the main driving source, and the two output shafts of the double-axis motor 46 are each provided with a bevel gear II 45. The bevel gear II 45 is meshed with the bevel gear I 44 close to it, thereby driving the material frame 43 to rotate and realizing automatic rotary feeding.

[0041] like Figure 6-Figure 8 As shown, the device also includes a circulation mechanism 6, which includes: a roller frame I 61, a pulley group 62, a connecting piece 63, a torsion spring 64, a connecting rod 65 and a roller frame II 66. A roller frame I 61 is rotatably arranged on the left side of the top of the retention frame 1. The roller frame I 61 is placed obliquely, and a pulley group 62 is arranged between the shaft body of the roller frame I 61 and the output shaft of the double-axis motor 46. The roller frame I 61 is driven by the double-axis motor 46 to operate counterclockwise, and the roller frame I 61 and the adsorption cotton 51 form a winding arrangement. The used adsorbent cotton 51 is extracted by closing. Connecting parts 63 are provided on both sides of the retention frame 1 below the two axes of the dual-axis motor 46. A connecting rod 65 is rotatably provided in the connecting part 63 through a torsion spring 64. The other end of the connecting rod 65 is inclined toward the direction of the roller frame Ⅰ61. A roller frame Ⅱ66 is rotatably provided between the two connecting rods 65. The roller frame Ⅱ66 is located above the roller frame Ⅰ61. The adsorbent cotton 51 is placed in the middle and clamped by the roller frame Ⅱ66 and the roller frame Ⅰ61 to complete the extraction.

[0042] like Fig. 9 and Fig.10 As shown, it also includes a sensor 7 and a floating member 71. The sensor 7 is arranged at the front side of the top of the retention frame 1. The sensor 7 is electrically connected to the dual-axis motor 46 and can be used to receive and transmit signals. A floating member 71 is slidingly arranged on the sensor 7. The floating member 71 is used to detect the water level, and the sensor 7 changes the frequency of the dual-axis motor 46 according to the water level signal.

[0043] like Figure 1 , Fig.11 and Fig.12 As shown, the device also includes a cleaning mechanism 8, which includes: a scraper frame 81, a scraper bar 82 and an intercepting bucket 9. The scraper frame 81 is slidably arranged at the inner bottom of the retention frame 1. The scraper frame 81 is divided into three parts, and each part is respectively placed in three compartments formed by the primary filter screen 101 and the secondary filter screen 102, and is used to scrape and discharge the sediment at the bottom of the retention frame 1. A handle is arranged on the front side of the scraper frame 81 to facilitate the pulling and pulling operation of the scraper frame 81. A scraper bar 82 is arranged on the top of the scraper frame 81. The scraper bar 82 is respectively in sliding contact with the surface of the primary filter screen 101 and the secondary filter screen 102, and can be used for cleaning their surfaces; an intercepting bucket 9 is arranged at the bottom end of the water inlet pipe 2, and the intercepting bucket 9 is used to block water products in the water, thereby limiting the extraction of the water flow.

[0044] Based on the above-mentioned water purification system for high-density crayfish farming, a method for using the water purification system for high-density crayfish farming includes the following steps:

[0045] S1. First, place the water inlet pipe 2 in the water area to be purified. The water flows into the retention frame 1 through the water inlet pipe 2. During the extraction of treated water, the interception bucket 9 blocks the water products. The treated water passes through the primary filter 101 and then the secondary filter 102 for filtration. Finally, the adsorption cotton 51 adsorbs the impurities in the water that cannot be filtered, completing the three-level filtration work.

[0046] S2, then start the double-axis motor 46 to drive the bevel gear II 45 to rotate, the bevel gear II 45 meshes with the bevel gear I 44 to rotate, and then drives the material frame 43 to rotate, and the chemical treatment agent is put into the water flow along with the rotation of the material frame 43, the treated water undergoes a chemical reaction, and some impurities generate sediments and are placed at the bottom of the retention frame 1;

[0047] S3, while the dual-axis motor 46 is operating, the pulley set 62 is driven to rotate and then the roller frame I 61 is driven to rotate, and the used adsorbent cotton 51 in the retention frame 1 is extracted upward, forming a replacement cycle operation, completing the replacement of the old and new adsorbent cotton 51, and at the same time, the roller frame II 66 clamps the upper part of the adsorbent cotton 51 to assist in the extraction of the adsorbent cotton 51;

[0048] S4, the position of the floating member 71 is changed according to the water level in the retention frame 1, and the sensor 7 sends a signal through the position of the floating member 71 to change the frequency of the dual-axis motor 46. When the water level is too high, the frequency of the dual-axis motor 46 is increased, so that the rotation speed of the material frame 43 and the roller frame Ⅰ61 becomes faster, thereby accelerating the overall purification process; when the water level is low, the frequency of the dual-axis motor 46 is slowed down, and the opposite operation is performed in summary;

[0049] S5. After the above process, the treated water finally enters the new water area through the outlet pipe 3. When the water in the retention frame 1 is drained, the sediment inside it reaches a certain accumulation amount. The scraper frame 81 is pulled to scrape and discharge the sediment at the bottom. At the same time, the scraper bar 82 scrapes the debris on the surface of the primary filter screen 101 and the secondary filter screen 102.

[0050] When it is necessary to purify the aquaculture waters of crayfish, the staff will place the device on the shore of the water area so that the water inlet pipe 2 is completely immersed in the water, and the treated water enters the retention frame 1 through the water inlet pipe 2. When the water flows through the water inlet pipe 2, it will pass through the interception bucket 9. The interception bucket 9 has holes. The aperture of the holes is suitable for the entry of water and can block aquatic products such as fish and shrimp. The treated water enters the retention frame 1 through the water inlet pipe 2, and then the double-axis motor 46 is started. The double-axis motor 46 drives the bevel gears II 45 on both sides to rotate, and the bevel gears II 45 are meshed with the bevel gears I 44, and then drive the material frame 43 connected thereto to rotate, so that the material frame 43 is placed in the outer shell 42 and is in a rotating state. The material frame 43 rotates continuously, and the chemical treatment agent loaded therein is put into the retention frame 1 through the holes and grooves opened on the material frame 43 and the outer shell 42. Because the outer shell 42 is provided with an empty groove matched with the hole position of the material frame 43, the chemical treatment agent is put in intermittently and regularly, thereby controlling the usage amount of the chemical treatment agent. After the chemical treatment agent is dissolved in water, it reacts chemically with the treated water to generate part of the precipitate and floccules. The precipitate sinks to the bottom of the retention frame 1 due to its own weight, and the floccules pass through the primary filter 101 through the flow direction of the water flow to complete the initial filtration, block the larger debris, and then pass through the secondary filter 102 for more detailed filtration. The aperture of the net 102 is smaller than that of the primary filter 101, so that the impurities in the water flow are gradually reduced with the filter screen, and the water flow passes through two layers of filter screens and enters the isolation plate 103, and then passes through the isolation plate 103 to enter the next processing compartment of the retention frame 1. Before the water flow approaches the outlet pipe 3, it will pass through the adsorption cotton 51 to adsorb some substances that cannot be filtered and precipitated in the water flow, so that the water flow completes the filtering effect three times. During the operation of the adsorption cotton 51, because the adsorption cotton 51 cooperates with the winding roller 5 to operate in a winding type, the upper end of the adsorption cotton 51 is connected to the retention frame 1 and is in an extractable state, so when the dual-axis motor 46 is operating, under the drive of the dual-axis motor 46, Then, the roller frame Ⅰ61 connected to it through the pulley group 62 is driven to rotate, so that it extracts the used adsorption cotton 51 to the left in a counterclockwise direction, and then the upper roller frame Ⅱ66 is driven to rotate at the same time as the adsorption cotton 51 moves to the left. When the roller frame Ⅱ66 rotates, the torsion spring 64 connected to it is deformed accordingly, and the connecting rod 65 is pushed to adjust the position of the roller frame Ⅱ66, so as to further clamp and fix the upper position of the adsorption cotton 51, and at the same time assist the winding operation of the roller frame Ⅰ61, so that the adsorption cotton 51 is continuously circulated and replaced, so as to keep the adsorption cotton 51 in the best use state;When the treated water enters the retention frame 1, the water level will continue to rise. When the water level reaches a certain level, the floating member 71 will slide upward due to the buoyancy of the water. At the same time, the sensor 7 senses the position of the floating member 71, thereby transmitting the signal to the dual-axis motor 46, so that the dual-axis motor 46 adjusts its frequency according to the change of the water level. When the water level is high, the frequency is accelerated, and the material discharge and winding frequency also become faster. When the water level is low, the frequency is reversed. Finally, the treated water passes through the three-layer filter to the outlet pipe 3 and enters the new water area. The water in the retention frame 1 is drained, and the debris in the retention frame 1 accumulates to a certain amount. The staff pulls the scraper frame 81 forward to scrape and discharge the debris at the bottom of the retention frame 1. In the process of extracting the scraper frame 81, the scraper bar 82 scrapes the surface of the primary filter screen 101 and the secondary filter screen 102 at the same time, so that the retention frame 1 remains clean and tidy. In summary, the overall operation is completed. ;

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A water purification system for high-density crayfish farming, comprising: A retention frame (1), a primary filter screen (101), a secondary filter screen (102), an isolation plate (103), a water inlet pipe (2), a water outlet pipe (3), a material discharge mechanism (4), a winding roller (5) and an adsorption cotton (51), wherein a primary filter screen (101) is arranged inside the retention frame (1), the primary filter screen (101) is located at a right position of the retention frame (1), a secondary filter screen (102) is arranged on the left side inside the retention frame (1), an isolation plate (103) is arranged between the secondary filter screen (102) and the retention frame (1), and the retention frame (1) is provided with a plurality of filter screens (102) and a plurality of filter screens (102) arranged on the left side of the retention frame (1). A water inlet pipe (2) is arranged at the right end of the frame (1), a water outlet pipe (3) is arranged at the left end of the retention frame (1), a material discharge mechanism (4) is arranged at the top of the retention frame (1), and a winding roller (5) is rotatably arranged between the two sides inside the retention frame (1), the winding roller (5) is located between the isolation plate (103) and the retention frame (1), an adsorption cotton (51) is rotatably arranged on the winding roller (5), and an empty groove is opened on the retention frame (1) above the adsorption cotton (51), and the empty groove is adapted to the adsorption cotton (51); The material unloading mechanism (4) is characterized in that the material unloading mechanism (4) comprises: an arch frame (41), an outer shell (42) and a material frame (43); the arch frame (41) is arranged on the right side of the top of the retention frame (1); two outer shells (42) are arranged between the arch frame (41) and the retention frame (1); the material frame (43) is rotatably sleeved inside the outer shell (42); and the two ends of the material frame (43) are rotatably connected to the arch frame (41) and the retention frame (1) respectively.

2. A water purification system for high-density crayfish farming according to claim 1, characterized in that: Also includes: Bevel gear I (44), bevel gear II (45) and double-axis motor (46), the left ends of the two material frames (43) are each provided with bevel gear I (44), the left part of the retention frame (1) is installed with a double-axis motor (46), and the two output shafts of the double-axis motor (46) are each provided with bevel gear II (45), and the bevel gear II (45) is meshed with the bevel gear I (44) adjacent thereto.

3. A water purification system for high-density crayfish farming according to claim 2, characterized in that: The device also includes a circulation mechanism (6), which includes: a roller frame I (61), a pulley group (62), a connecting piece (63), a torsion spring (64), a connecting rod (65) and a roller frame II (66). The roller frame I (61) is rotatably arranged on the left side of the top of the retention frame (1). A pulley group (62) is arranged between the shaft of the roller frame I (61) and the output shaft of the double-axis motor (46), and the roller frame I (61) is wound together with the adsorption cotton (51). Connecting pieces (63) are arranged on both sides of the retention frame (1) below the two axes of the double-axis motor (46). A connecting rod (65) is rotatably arranged in the connecting piece (63) through a torsion spring (64). A roller frame II (66) is rotatably arranged between the two connecting rods (65), and the roller frame II (66) is located above the roller frame I (61).

4. A water purification system for high-density crayfish farming according to claim 3, characterized in that: Also includes: A sensor (7) and a floating member (71), wherein the front side of the retention frame (1) is provided with a sensor (7), the sensor (7) is electrically connected to the dual-axis motor (46), and a floating member (71) is slidably provided on the sensor (7).

5. A water purification system for high-density crayfish farming according to claim 4, characterized in that: The device also comprises a cleaning mechanism (8), the cleaning mechanism (8) comprising: a scraping frame (81), a scraping bar (82) and an intercepting bucket (9); the scraping frame (81) is slidably arranged at the inner bottom of the retention frame (1), and the scraping bar (82) is arranged at the top of the scraping frame (81); and the intercepting bucket (9) is arranged on the water inlet pipe (2).

6. A water purification system for high-density crayfish farming according to claim 5, characterized in that: The scraper frame (81) is divided into three parts, each part is placed in three compartments formed by the primary filter screen (101) and the secondary filter screen (102), and the scraper bar (82) is in sliding contact with the surface of the primary filter screen (101) and the secondary filter screen (102).

7. A water purification system for high-density crayfish farming according to claim 6, characterized in that: The pore size of the primary filter (101) is larger than the pore size of the secondary filter (102).

8. A method for using the water purification system for high-density crayfish farming according to any one of claims 1 to 7, characterized in that: Included are: S1. First, the water inlet pipe (2) is placed in the water area to be purified. The water flows into the retention frame (1) through the water inlet pipe (2). During the process of extracting the treated water, the interception bucket (9) blocks the water products. The treated water is filtered through the primary filter (101) and then through the secondary filter (102). Finally, the impurities in the water that cannot be filtered are adsorbed by the adsorption cotton (51), completing the three-level filtration work. S2, then start the double-shaft motor (46), drive the bevel gear II (45) to rotate, the bevel gear II (45) meshes with the adjacent bevel gear I (44) to rotate, and then drive the material frame (43) to rotate, the chemical treatment agent is put into the water flow with the rotation of the material frame (43), the treated water undergoes a chemical reaction, and some impurities generate sediments and are placed at the bottom of the retention frame (1); S3, while the dual-axis motor (46) is operating, the pulley set (62) is driven to rotate and then the roller frame I (61) is driven to rotate, so that the used adsorption cotton (51) in the retention frame (1) is extracted upwardly in a cycle, and the old adsorption cotton (51) is replaced with the new adsorption cotton (51). At the same time, the roller frame II (66) clamps the upper part of the adsorption cotton (51) to assist in the extraction of the adsorption cotton (51); S4, the position of the floating member (71) is changed according to the water level in the retention frame (1), and the sensor (7) sends a signal through the position of the floating member (71) to change the frequency of the double-axis motor (46). When the water level is too high, the frequency of the double-axis motor (46) is increased, so that the rotation speed of the material frame (43) and the roller frame I (61) becomes faster, thereby accelerating the overall purification process; when the water level is low, the frequency of the double-axis motor (46) is slowed down, and the above operation is performed in reverse. S5. After the above steps, the treated water finally enters a new water area through the outlet pipe (3). When the water in the retention frame (1) is completely drained and the sediment inside reaches a certain amount of accumulation, the sediment at the bottom is scraped and discharged by pulling the scraper frame (81). At the same time, the scraper bar (82) scrapes the debris on the surface of the primary filter screen (101) and the secondary filter screen (102).

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