A microfiltration device for circulating water aquaculture and its use method

Abstract

The present invention discloses a microfiltration device for circulating aquaculture and a method of using the same, and relates to the technical field of circulating aquaculture equipment, including a treatment box and a filter drum rotatably connected to the treatment box; the treatment box is respectively provided with an inlet pipe and an outlet pipe, one end of the inlet pipe and the outlet pipe are both plugged into the inside of the filter drum along the axis of the filter drum, a collection bin is provided in the filter drum, and the top of the collection bin is provided close to the filter drum; a cleaning mechanism is provided on the collection bin. The present invention can form a structure that generates negative pressure suction on the inner wall of the filter drum by providing a cleaning mechanism, thereby effectively absorbing fish feces adhered to the inner wall of the filter drum, and achieving the purpose of cleaning the inner wall; this method not only reduces the problem of splashing of fish feces when cleaning the filter structure on the filter drum, but also improves the efficiency of collecting fish feces, further reduces the breeding of bacteria caused by splashing of fish feces, and optimizes the overall cleaning effect.

Description

Technical Field

[0001] The present invention relates to the technical field of circulating aquaculture equipment, and in particular to a microfiltration device for circulating aquaculture and a method of using the device. Background Art

[0002] Aquaculture is one of the fastest growing food industries in the world, providing humans with high-quality protein; however, traditional farming methods are relatively extensive and have a low degree of industrialization, especially in the recycling of water resources and nutrients; therefore, improving the recycling rate of resources and reducing environmental pollution are crucial to promoting the healthy and stable development of the aquaculture industry.

[0003] In the existing technology, the factory-scale recirculating aquaculture system adopts certain engineering facilities and circulating water treatment facilities to recycle the aquaculture water after appropriate biochemical treatment, thereby achieving high yield, high efficiency, high quality and "near-zero" emissions.

[0004] However, the above circulating water treatment equipment still has the following defects during use:

[0005] In the water treatment process of factory-scale high-density circulating aquaculture, the filter cylinder of the microfiltration equipment needs to be backwashed regularly; however, during the backwashing process, the fish feces blocked in the filter holes are easily splashed around with the water flow and adhered to the collection bin; this will not only cause a large number of bacteria to grow, but also seriously pollute the circulating water, affecting the normal operation of the system and water quality safety;

[0006] During the rotation and filtration process of the filter drum, only the fish feces located on the top inner wall can fall into the collection bin under the action of gravity; the agglomerated fish feces are difficult to adhere to the drum due to their greater gravity and move to the top with the rotation of the drum. They will be broken up as the filter drum rotates before they can be discharged; this process takes a long time, and the broken up fish feces are more tightly combined with water, which can easily breed a large number of bacteria and affect the water quality and water circulation efficiency. Summary of the invention

[0007] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a microfiltration device for circulating aquaculture and a method of using the same, so as to solve the problem that the existing microfiltration device for circulating aquaculture proposed in the above-mentioned background technology cannot quickly discharge the clumping fish feces, causing the clumping fish feces to stay in the filter cylinder for a long time and easily breed a large number of bacteria.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A microfiltration device for circulating aquaculture, comprising a treatment box and a filter drum rotatably connected to the treatment box; the treatment box is respectively provided with an inlet pipe and an outlet pipe, one end of each of the inlet pipe and the outlet pipe is plugged into the inside of the filter drum along the axis of the filter drum, a collecting bin is provided in the filter drum, the top of the collecting bin is provided close to the filter drum, and the bottom of the collecting bin is connected to the outlet pipe; a cleaning mechanism is provided on the collecting bin; the cleaning mechanism comprises:

[0010] a first rotating plate, the first rotating plate being rotatably connected to the collecting bin;

[0011] A baffle, the baffle is arranged in the collection bin, the first rotating plate, the baffle and the collection bin form a storage cavity with an opening at the top; the baffle is an arc-shaped structure, and one side of the first rotating plate can slide along the surface of the arc-shaped structure;

[0012] And a second driving mechanism, which is installed in the collection bin; the second driving mechanism is used to drive the first rotating plate to rotate, so as to change the size of the internal space of the storage cavity and the size of the top opening of the storage cavity.

[0013] Preferably, the second driving mechanism includes a first rotating shaft, a cam, a stopper and a control mechanism; the first rotating shaft is rotatably connected to the collecting bin, one end of the first rotating shaft passes through the collecting bin and is inserted into the storage cavity, the cam is arranged at one end of the first rotating shaft, the stopper is arranged on the first rotating plate, and the stopper is in conflict with the cam; the first rotating plate and the collecting bin are rotatably connected via a first connecting shaft, and a first torsion spring is arranged at the rotational connection position between the first connecting shaft and the collecting bin; the control mechanism is used to control the rotation of the first rotating shaft, the cam includes a protrusion and a recessed portion; the stopper is adapted to the recessed portion.

[0014] Preferably, the collecting bin is provided with a discharge mechanism for discharging fish feces in the storage chamber; the discharge mechanism comprises a second rotating plate, a sector gear and a rack; the second rotating plate is arranged between the baffle and the collecting bin, one side of the second rotating plate is rotationally connected to the collecting bin via a second connecting shaft, and a second torsion spring is arranged at the rotational connection position between the second connecting shaft and the collecting bin; the first rotating plate, the baffle, the second rotating plate and the collecting bin form a storage chamber with an opening at the top; the sector gear is coaxially connected to the second connecting shaft, and the rack is arranged on the first rotating plate; when one side of the second rotating plate rotates and approaches the second rotating plate, it can drive the rack to engage with the sector gear to drive the second rotating plate to rotate, so that the bottom of the storage chamber is opened.

[0015] Preferably, an extrusion filtering mechanism is provided between the inlet pipe and the outlet pipe; the extrusion filtering mechanism comprises a filter box and an extrusion conveying mechanism; through grooves are provided on both sides of the filter box, and the extrusion conveying mechanism is provided in the filter box; the extrusion conveying mechanism is used for extruding and filtering the sewage discharged from the inlet pipe to filter the fish feces carried by the sewage, and the filtered sewage is discharged through the through grooves on both sides of the filter box; the inlet pipe is connected with the outlet pipe through the filter box; the fish feces filtered by the extrusion conveying mechanism is discharged through the outlet pipe.

[0016] Preferably, the extrusion conveying mechanism includes a first linkage mechanism, two pairs of first rotating wheels and a pair of conveyor belts; the first rotating wheels are rotatably connected to the filter box; one conveyor belt is tensioned on a pair of first rotating wheels, and the other conveyor belt is tensioned on another pair of first rotating wheels; the pair of conveyor belts are arranged in parallel; the first linkage mechanism is arranged in the filter box, and as the filter drum rotates, the first linkage mechanism drives the pair of conveyor belts to drive, so as to squeeze and filter the sewage carrying fish feces between the pair of conveyor belts;

[0017] A second rotating wheel is arranged on one of the first rotating wheels in each pair of first rotating wheels, and first belts are stretched on the two second rotating wheels.

[0018] Preferably, a filter hole is provided on the conveyor belt, and a convex block matched with the filter hole is provided on the first rotating wheel; the convex block at the contact portion between the first rotating wheel and the conveyor belt is inserted into the filter hole.

[0019] Preferably, a pair of adjusting wheels are rotatably connected in the filter box, and the conveyor belt is tensioned on the adjusting wheels; the adjusting wheels are used to adjust the spacing between the pair of conveyor belts.

[0020] Preferably, the first linkage mechanism includes a third wheel, a second belt, a second rotating shaft, a first bevel gear and a second bevel gear; a fourth wheel is coaxially fixed inside the filter drum, the second rotating shaft is rotatably connected to the filter box, the third wheel is arranged at one end of the second rotating shaft, and the second belt is tensioned on the fourth wheel and the third wheel; the first bevel gear is arranged at the other end of the second rotating shaft, the second bevel gear is coaxially connected to one of the first wheels, and the first bevel gear is meshed with the second bevel gear.

[0021] Preferably, the control mechanism can be replaced by a second linkage mechanism; the first rotating shaft is driven to rotate by the second linkage mechanism; the second linkage mechanism is arranged in the filter box; the second linkage mechanism includes a third bevel gear and a fourth bevel gear; the third bevel gear is coaxially connected to one of the first rotating wheels, the fourth bevel gear is coaxially connected to the first rotating shaft, and the third bevel gear is meshed with the fourth bevel gear.

[0022] A method for using a microfiltration device for circulating aquaculture, comprising the following steps:

[0023] Step 1, rotary filtration: The sewage brought in through the inlet pipe is filtered by the filter drum and then discharged from the bottom of the treatment box; during the filtration process of the filter drum, the filter drum is driven to rotate, so that the fish feces adhered to the filter drum are closely attached to the inner wall of the filter drum and rotate upward and move to the top of the collection bin, and then fall into the collection bin under the action of gravity and are discharged through the outlet pipe;

[0024] Step 2: Synchronous cleaning: In the process of driving the filter drum to rotate, the first rotating plate is driven to rotate by the second driving mechanism, so that the internal space of the storage chamber becomes larger, and at the same time the opening at the top of the storage chamber becomes smaller. At this time, negative pressure suction is generated inside the storage chamber, and the fish feces blocking the filter drum are quickly sucked into the storage chamber, thereby achieving the purpose of cleaning the filter drum.

[0025] Beneficial effects of the present invention:

[0026] By setting up a cleaning mechanism, a structure that generates negative pressure suction on the inner wall of the filter drum can be formed, thereby effectively absorbing fish feces adhering to the inner wall of the filter drum, thereby achieving the purpose of cleaning the inner wall; this method not only reduces the problem of fish feces splashing when cleaning the filter structure on the filter drum, but also improves the fish feces collection efficiency, further reduces the bacterial growth caused by fish feces splashing, and optimizes the overall cleaning effect;

[0027] By setting up an extrusion conveying mechanism, the large pieces of clumped fish feces introduced can be directly squeezed and filtered for cleaning; the residence time of clumped fish feces in the filter drum is reduced, the fish feces cleaning effect is improved, and the filtering burden of the filter drum is reduced; at the same time, it can also prevent large pieces of fish feces from being broken up and breeding a large number of bacteria, further optimizing the entire cleaning process;

[0028] By providing the first linkage mechanism and the second linkage mechanism, the operation of the extrusion conveying mechanism and the cleaning mechanism can be synchronously linked through the rotation of the filter drum, thereby reducing interference with the rotation of the filter drum and improving ease of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 It is a schematic diagram of the overall first-view stereoscopic structure of the present invention;

[0031] Figure 2 is a schematic diagram of the overall second viewing angle stereoscopic structure of the present invention;

[0032] Figure 3 It is a three-dimensional enlarged structural schematic diagram of the present invention after the processing box is removed;

[0033] Figure 4It is a partially cutaway three-dimensional enlarged structural schematic diagram of the filter drum of the present invention;

[0034] Figure 5 It is a schematic diagram of a three-dimensional enlarged structure of the collection bin of the present invention;

[0035] Figure 6 It is a partially cutaway three-dimensional enlarged structural schematic diagram of the cleaning mechanism of the present invention;

[0036] Figure 7 It is a schematic diagram of a side cutaway enlarged structure of the cleaning mechanism of the present invention;

[0037] Figure 8 It is a schematic diagram of a three-dimensional enlarged structure of the cam of the present invention;

[0038] Fig. 9 It is a partially cutaway three-dimensional enlarged structural schematic diagram of the extrusion conveying mechanism of the present invention;

[0039] Fig.10 The present invention Fig. 9 A schematic diagram of the enlarged structure of the middle A area;

[0040] Fig.11 The present invention Fig. 9 Schematic diagram of the enlarged structure of the middle B area;

[0041] Fig.12 It is a flow chart of the method of the present invention.

[0042] In the figure: 1, treatment box; 2, filter drum; 3, first driving mechanism; 4, inlet pipe; 5, collection bin; 6, outlet pipe; 7, cleaning mechanism; 71, first rotating plate; 72, baffle; 73, second driving mechanism; 731, first rotating shaft; 732, cam; 733, block; 7321, raised part; 7322, recessed part; 74, outlet mechanism; 741, second rotating plate; 742, sector gear; 743, rack; 8, extrusion filter Mechanism; 81, filter box; 82, extrusion conveying mechanism; 821, first rotating wheel; 822, conveyor belt; 823, filter hole; 824, adjusting wheel; 825, bump; 826, first linkage mechanism; 8261, third rotating wheel; 8262, second belt; 8263, second rotating shaft; 8264, first bevel gear; 8265, second bevel gear; 827, second linkage mechanism; 8271, third bevel gear; 8272, fourth bevel gear. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] like Figure 1-Figure 11 As shown, a microfiltration device for circulating water aquaculture, such as Figure 1-Figure 7 As shown, it includes a processing box 1 and a filter drum 2 rotatably connected to the processing box 1; a first driving mechanism 3 is provided on the processing box 1, and the first driving mechanism 3 is used to drive the filter drum 2 to rotate around its axis; it can be understood that the first driving mechanism 3 is a prior art and will not be described in detail; an inlet pipe 4 and an outlet pipe 6 are respectively provided on the processing box 1, and one end of the inlet pipe 4 and the outlet pipe 6 are inserted into the inside of the filter drum 2 along the axis of the filter drum 2, and a collecting bin 5 is provided in the filter drum 2, and the top of the collecting bin 5 is arranged close to the filter drum 2, and the bottom of the collecting bin 5 is connected to the outlet pipe 6; the collecting bin 5 A cleaning mechanism 7 is provided on the bin 5; the cleaning mechanism 7 comprises: a first rotating plate 71, which is rotatably connected to the collecting bin 5; a baffle 72, which is arranged in the collecting bin 5, and the first rotating plate 71, the baffle 72 and the collecting bin 5 form a storage cavity with an opening at the top; the baffle 72 is an arc-shaped structure, and one side of the first rotating plate 71 can slide along the surface of the arc-shaped structure; and a second driving mechanism 73, which is installed on the collecting bin 5; the second driving mechanism 73 is used to drive the first rotating plate 71 to rotate, so as to change the size of the internal space of the storage cavity and the size of the top opening of the storage cavity.

[0045] It should be noted that the filter drum 2 is driven to rotate by the first driving mechanism 3, so that the fish feces are closely attached to the inner wall of the filter drum 2 and rotate upward, and move to the top of the collecting bin 5. At this time, most of the fish feces fall into the collecting bin 5 for collection under the action of gravity; at the same time, the first rotating plate 71 is driven to rotate forwardly by the second driving mechanism 73, so that the internal space of the storage chamber is increased, and at the same time, the top opening of the storage chamber is reduced. At this time, negative pressure is generated inside the storage chamber due to the increase in space, and then suction is generated on the top opening position of the storage chamber, and then the fish feces on the filter drum 2 near the opening position of the storage chamber are sucked into the storage chamber, so as to achieve the purpose of cleaning the fish feces adhered to the filter drum 2 by suction, instead of the existing structure of backwashing, reducing the splashing of fish feces adhered to the filter drum 2 caused by the blasting of water flow or air flow, improving the fish feces collection efficiency, and reducing the problem of a large number of bacteria breeding caused by the splashing of fish feces;

[0046] It can be understood that when the second driving mechanism 73 drives the first rotating plate 71 to rotate in the opposite direction, that is, at this time, the internal space of the storage chamber becomes smaller and the top opening becomes larger. At this time, although the outward airflow is generated due to the smaller internal space of the storage chamber, the flow rate of the airflow blowing out of the storage chamber can be slowed down due to the enlargement of the top opening, that is, the wind force of the airflow on the filter drum 2 is reduced, and the fish feces blocked on the filter drum 2 will not pass through the filter drum 2 into the filtered water;

[0047] At the same time, when the second driving mechanism 73 drives the first rotating plate 71 to rotate in the opposite direction, the first rotating plate 71 rotates to approach the inner wall of the filter drum 2, and the rotation direction of the filter drum 2 is opposite to the rotation direction of the first rotating plate 71. Therefore, as the filter drum 2 rotates, part of the fish feces adhering to the inner wall of the filter drum 2 can be scraped off by the first rotating plate 71, so that it falls into the collection bin 5 under the action of gravity, thereby improving the cleaning effect.

[0048] like Figure 1-Figure 8 As shown, the second driving mechanism 73 includes a first rotating shaft 731, a cam 732, a stopper 733 and a control mechanism; it can be understood that the control mechanism is a prior art, and the control mechanism is used to control the rotation of the first rotating shaft 731, such as a motor coaxially connected to the first rotating shaft 731 in the prior art; the first rotating shaft 731 is rotationally connected to the collecting bin 5, one end of the first rotating shaft 731 passes through the collecting bin 5 and is inserted into the storage cavity, the cam 732 is arranged at one end of the first rotating shaft 731, the stopper 733 is arranged on the first rotating plate 71, and the stopper 733 conflicts with the cam 732; the first rotating plate 71 and the collecting bin 5 are rotationally connected via a first connecting shaft, and a first torsion spring is arranged at the rotational connection position between the first connecting shaft and the collecting bin 5; the cam 732 includes a protrusion 7321 and a recessed portion 7322; the stopper 733 is adapted to the recessed portion 7322.

[0049] The cam 732 is driven to rotate by the control mechanism, and the stopper 733 is pushed to move by the raised portion 7321 of the cam 732, thereby driving the first rotating plate 71 to rotate in the opposite direction, thereby achieving the purpose of driving the first rotating plate 71 to rotate in the opposite direction; at this time, the rotation of the first rotating plate 71 drives the compression of the first torsion spring, and when the cam 732 rotates to the recessed portion 7322 and contacts the stopper 733, the first rotating plate 71 is pushed to rotate forward and reset under the action of the first torsion spring; in this way, the first rotating plate 71 can be controlled to swing back and forth by the control mechanism, thereby achieving continuous suction on the inner wall of the filter drum 2, thereby achieving the purpose of cleaning the filter structure of the filter drum 2.

[0050] like Figure 1-Figure 7As shown, the collecting bin 5 is provided with an outlet mechanism 74 for outlet fish feces in the storage chamber; the outlet mechanism 74 comprises a second rotating plate 741, a sector gear 742 and a rack 743; the second rotating plate 741 is arranged between the baffle 72 and the collecting bin 5, one side of the second rotating plate 741 is rotatably connected to the collecting bin 5 via a second connecting shaft, and a second torsion spring is arranged at the rotating connection position between the second connecting shaft and the collecting bin 5; the first rotating plate 71, the baffle 72, the second rotating plate 741 and the collecting bin 5 form a storage chamber with an opening at the top; the sector gear 742 is coaxially connected to the second connecting shaft, and the rack 743 is arranged on the first rotating plate 71; when one side of the second rotating plate 741 rotates and approaches the second rotating plate 741, the rack 743 can be driven to engage with the sector gear 742 to drive the second rotating plate 741 to rotate, so that the bottom of the storage chamber is opened.

[0051] It should be noted that when the first rotating plate 71 is driven to rotate forward so that the internal space of the storage chamber becomes larger, the second rotating plate 741 is always in contact with the collection bin 5 and remains closed under the action of the second torsion spring; and when the first rotating plate 71 is rotated reversely so that the internal space of the storage chamber becomes smaller, the rack 743 on the first rotating plate 71 moves closer to the fan-shaped gear 742. During this process, the second rotating plate 741 is still in contact with the collection bin 5 and remains closed under the action of the second torsion spring, and the storage chamber is squeezed by the rotation of the first rotating plate 71. The fish feces are collected by the second rotating plate 741 until the rack 743 and the fan-shaped gear 742 are in contact and meshed with each other, and the fan-shaped gear 742 is pushed to rotate by the rack 743, thereby driving the second rotating plate 741 to rotate and open, so that the fish feces in the storage chamber fall downward to the collecting bin 5 under the action of gravity for discharge. In this process, the discharge of the fish feces reduces the space occupied in the storage chamber, slows down the flow rate of the airflow ejected outwards due to the reduction of the space in the storage chamber, and reduces the impact of the separated airflow on the inner wall of the filter drum 2;

[0052] When there is no fish feces in the storage chamber, the first rotating plate 71 is driven to rotate forwardly, which first drives the second rotating plate 741 to quickly restore the contact with the collecting bin 5, that is, the bottom of the storage chamber is relatively sealed. At this time, the first rotating plate 71 is continued to be driven to rotate forwardly, so that the space in the storage chamber is increased. At this time, only the top of the storage chamber is connected to the outside. Therefore, as the internal space of the storage chamber increases, a greater suction force is generated at the top of the storage chamber, thereby achieving the purpose of absorbing fish feces adhered to the inner wall of the filter drum 2, thereby ensuring the cleaning and collection effect of fish feces.

[0053] like Figure 1-Figure 7 and Fig. 9As shown, an extrusion filtering mechanism 8 is arranged between the inlet pipe 4 and the outlet pipe 6; the extrusion filtering mechanism 8 includes a filter box 81 and an extrusion conveying mechanism 82; through grooves are provided on both sides of the filter box 81, and the extrusion conveying mechanism 82 is arranged in the filter box 81; the extrusion conveying mechanism 82 is used for extruding and filtering the sewage discharged from the inlet pipe 4 to filter the fish feces carried by the sewage, and the filtered sewage is discharged through the through grooves on both sides of the filter box 81; the inlet pipe 4 is connected with the outlet pipe 6 through the filter box 81; the fish feces filtered by the extrusion conveying mechanism 82 are discharged through the outlet pipe 6.

[0054] It should be noted that, in the process of the sewage carrying fish feces being discharged into the interior of the filter drum 2 through the inlet pipe 4, the sewage is now introduced into the filter box 81, and the sewage is squeezed and filtered by the squeezing and conveying mechanism 82, so that the large particles of fish feces and large-volume debris such as fish food carried by the sewage are squeezed and filtered, and the filtered debris is directly discharged through the outlet pipe 6, so as to achieve the purpose of directly cleaning the large pieces of fish feces that are clumped, and prevent the clumped fish feces from rolling and dispersing in the filter drum 2 before adhering to the inner wall of the filter drum 2 and being discharged, thereby improving the cleaning effect of fish feces, reducing the filtering burden of the filter drum 2, and preventing large pieces of fish feces from being broken up and nourishing a large number of bacteria; and the filtered sewage is discharged through the through grooves on both sides of the filter box 81, forming a dispersed discharge structure on both sides, preventing the fish feces carried by the sewage from being too concentrated at the bottom of the filter drum 2, and solving the problem that the fish feces are too concentrated and the gravity increases and cannot adhere to the inner wall of the filter drum 2 and be discharged as the filter drum 2 rotates.

[0055] like Figure 4 and Figure 9-11 As shown, the extrusion conveying mechanism 82 includes a first linkage mechanism 826, two pairs of first rotating wheels 821 and a pair of conveyor belts 822; the first rotating wheels 821 are rotatably connected to the filter box 81; one of the conveyor belts 822 is tensioned on a pair of first rotating wheels 821, and the other conveyor belt 822 is tensioned on another pair of first rotating wheels 821; the pair of conveyor belts 822 are arranged in parallel; the first linkage mechanism 826 is arranged in the filter box 81, and as the filter drum 2 rotates, the first linkage mechanism 826 drives the pair of conveyor belts 822 to transmit, so as to squeeze and filter the sewage carrying fish feces between the pair of conveyor belts 822; a second rotating wheel is arranged on one of the first rotating wheels 821 in each pair of first rotating wheels 821, and the first belts are tensioned on the two second rotating wheels; a pair of adjusting wheels 824 are rotatably connected in the filter box 81, and the conveyor belt 822 is tensioned on the adjusting wheel 824; the adjusting wheel 824 is used to adjust the spacing between the pair of conveyor belts 822.

[0056] It should be noted that, as the filter drum 2 rotates, the first linkage mechanism 826 is driven to move, and one of the first wheels 821 is driven to rotate through the first linkage mechanism 826, and then one of the conveyor belts 822 is driven to transmit. Moreover, through the rotation of one of the first wheels 821, under the action of the second wheel and the first belt, the other pair of first wheels 821 is driven to rotate, and then the other conveyor belt 822 is driven to transmit synchronously, so that the fish feces are squeezed and filtered through the conveyor belt 822 and the fish feces are transferred to the outlet pipe 6 for outlet, so as to achieve the purpose of directly filtering and exporting larger clumped fish feces.

[0057] like Figure 10-11 As shown, a filter hole 823 is provided on the conveyor belt 822, and a protrusion 825 matched with the filter hole 823 is provided on the first rotating wheel 821; the protrusion 825 at the contact portion between the first rotating wheel 821 and the conveyor belt 822 is inserted into the filter hole 823; it should be noted that sewage is filtered through the filter hole 823 on the conveyor belt 822, and at the same time, the setting of the protrusion 825 ensures the tension transmission efficiency of the conveyor belt 822 and prevents the first rotating wheel 821 from slipping; and the protrusion 825 on the first rotating wheel 821 is inserted into the filter hole 823 to achieve the purpose of reverse extrusion of the filter hole 823, and the fish feces blocked in the filter hole 823 are pushed out in reverse, so as to ensure the continuous filtering effect of the filter hole 823.

[0058] like Figure 9-10 As shown, it can be understood that the present application does not limit the specific structure and installation method of the first linkage mechanism 826, and only a feasible technical solution is provided below; the first linkage mechanism 826 includes a third rotating wheel 8261, a second belt 8262, a second rotating shaft 8263, a first bevel gear 8264 and a second bevel gear 8265; a fourth rotating wheel is coaxially fixed inside the filter drum 2, the second rotating shaft 8263 is rotatably connected to the filter box 81, the third rotating wheel 8261 is arranged at one end of the second rotating shaft 8263, and the second belt 8262 is tensioned on the fourth rotating wheel and the third rotating wheel 8261; the first bevel gear 8264 is arranged at the other end of the second rotating shaft 8263, the second bevel gear 8265 is coaxially connected to one of the first rotating wheels 821, and the first bevel gear 8264 is meshed with the second bevel gear 8265.

[0059] It should be noted that, since the first linkage mechanism 826 needs to be arranged on the filter drum 2 (such as Figure 3), the environment inside the filter drum 2 is close to the sewage, and in order to prevent interference with the rotation of the filter drum 2, a first linkage mechanism 826 structure is provided to replace the existing structure of directly driving the first rotating wheel 821 to rotate with a motor; specifically, the fourth rotating wheel is driven to rotate by the rotation of the filter drum 2, and the third rotating wheel 8261 is driven to rotate by the cooperation of the second belt 8262, thereby driving the second rotating shaft 8263 to rotate, and the first bevel gear 8264 is driven to rotate by the second rotating shaft 8263, and the second bevel gear 8265 is driven to rotate by the first bevel gear 8264, thereby driving one of the first rotating wheels 821 to rotate, and thereby driving the conveyor belt 822 to squeeze and transport the fish feces; the provision of the first linkage mechanism 826 can prevent interference with the rotation of the filter drum 2.

[0060] like Figure 6-Figure 7 and Fig.11 As shown, it should be noted that when the control mechanism uses an existing structure such as a motor to control the rotation of the first rotating shaft 731, the motor structure requires an external power supply, and the control mechanism needs to be set on the filter drum 2 (such as Figure 3 As shown in the figure, the control mechanism is inside the filter drum 2 and does not interfere with the rotation of the filter drum 2. Therefore, the control mechanism can be replaced by a second linkage mechanism 827; the first rotating shaft 731 is driven to rotate by the second linkage mechanism 827; the second linkage mechanism 827 is arranged on the filter box 81; the second linkage mechanism 827 includes a third bevel gear 8271 and a fourth bevel gear 8272; the third bevel gear 8271 is coaxially connected to one of the first rotating wheels 821, the fourth bevel gear 8272 is coaxially connected to the first rotating shaft 731, and the third bevel gear 8271 is meshed with the fourth bevel gear 8272.

[0061] It should be noted that, through the rotation of one of the first rotating wheels 821, the third bevel gear 8271 is driven to rotate, the third bevel gear 8271 drives the fourth bevel gear 8272 to rotate, and then drives the first rotating shaft 731 to rotate, thereby achieving the purpose of driving the first rotating plate 71 to rotate.

[0062] like Figure 1-Figure 12 As shown, a method for using a microfiltration device for circulating aquaculture comprises the following steps:

[0063] Step 1, rotary filtration: The sewage brought in through the inlet pipe 4 is filtered by the filter drum 2 and then discharged from the bottom of the treatment box 1; during the filtering process of the filter drum 2, the filter drum 2 is driven to rotate, so that the fish feces adhered to the filter drum 2 are closely attached to the inner wall of the filter drum 2 and rotate upward and move to the top of the collection bin 5, and then fall into the collection bin 5 under the action of gravity, and are discharged through the outlet pipe 6;

[0064] Step 2: Synchronous cleaning: In the process of driving the filter drum 2 to rotate, the first rotating plate 71 is driven to rotate by the second driving mechanism 73, so that the internal space of the storage chamber becomes larger, and at the same time the opening at the top of the storage chamber becomes smaller. At this time, negative pressure suction is generated inside the storage chamber, and the fish feces blocking the filter drum 2 are quickly sucked into the storage chamber, thereby achieving the purpose of cleaning the filter drum 2.

[0065] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction and a specific direction structure and operation, and therefore, cannot be understood as a limitation on the present invention. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0066] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A microfiltration device for circulating aquaculture, comprising a treatment box (1) and a filter drum (2) rotatably connected to the treatment box (1); a collection bin (5) is arranged in the filter drum (2); and the characteristics are: The collection bin (5) is provided with a cleaning mechanism (7); the cleaning mechanism (7) comprises: A first rotating plate (71), the first rotating plate (71) being rotatably connected to the collecting bin (5); a baffle (72), the baffle (72) being arranged in the collection bin (5), the first rotating plate (71), the baffle (72) and the collection bin (5) forming a storage cavity with an opening at the top; the baffle (72) being an arc-shaped structure, and one side of the first rotating plate (71) being able to slide along the surface of the arc-shaped structure; and a second driving mechanism (73), the second driving mechanism (73) being mounted on the collection bin (5); the second driving mechanism (73) being used to drive the first rotating plate (71) to rotate, so as to change the size of the internal space of the storage cavity and the top opening; The microfiltration device for circulating aquaculture also includes the following steps: Step 1: Rotary filtration: The sewage is filtered by the filter drum (2) and then discharged from the bottom of the treatment box (1); during the filtration process, the filter drum (2) is driven to rotate so that the fish feces inside it rise to the top of the collection bin (5) along the inner wall, and then fall into the collection bin (5) due to gravity and are discharged; Step 2: synchronous cleaning: the first rotating plate (71) is driven to rotate by the second driving mechanism (73), thereby increasing the internal space of the storage chamber and reducing the top opening thereof, thereby forming a negative pressure in the storage chamber and sucking in the fish feces that clog the filter drum (2).

2. A microfiltration device for circulating aquaculture according to claim 1, characterized in that: The second driving mechanism (73) comprises a first rotating shaft (731), a cam (732), a stopper (733) and a control mechanism; the first rotating shaft (731) is rotatably connected to the collecting bin (5); one end of the first rotating shaft (731) passes through the collecting bin (5) and is inserted into the storage cavity; the cam (732) is arranged at one end of the first rotating shaft (731); the stopper (733) is arranged on the first rotating plate (71), and the stopper (733) is in conflict with the cam (732); the first rotating plate (71) and the collecting bin (5) are rotatably connected via a first connecting shaft; a first torsion spring is arranged at a position where the first connecting shaft and the collecting bin (5) are rotatably connected; the control mechanism is used to control the rotation of the first rotating shaft (731); The cam (732) comprises a protruding portion (7321) and a recessed portion (7322); the stopper (733) is adapted to the recessed portion (7322).

3. A microfiltration device for circulating aquaculture according to claim 1, characterized in that: The collecting bin (5) is provided with an outlet mechanism (74) for outlet fish feces in the storage chamber; the outlet mechanism (74) comprises a second rotating plate (741), a sector gear (742) and a rack (743); the second rotating plate (741) is arranged between the baffle plate (72) and the collecting bin (5); one side of the second rotating plate (741) is rotatably connected to the collecting bin (5) via a second connecting shaft; a second torsion spring is arranged at the rotatably connected position between the second connecting shaft and the collecting bin (5); The first rotating plate (71), the baffle plate (72), the second rotating plate (741) and the collecting bin (5) form a storage chamber with an opening at the top; the sector gear (742) is coaxially connected to the second connecting shaft, and the rack (743) is arranged on the first rotating plate (71); when one side of the second rotating plate (741) rotates and approaches the second rotating plate (741), the rack (743) can be driven to engage with the sector gear (742), so as to drive the second rotating plate (741) to rotate, so that the bottom of the storage chamber is opened.

4. A microfiltration device for circulating aquaculture according to claim 2, characterized in that: The processing box (1) is provided with an inlet pipe (4) and an outlet pipe (6), one end of each of the inlet pipe (4) and the outlet pipe (6) is inserted into the interior of the filter drum (2) along the axis of the filter drum (2), and the bottom of the collection bin (5) is connected to the outlet pipe (6); An extrusion filtering mechanism (8) is arranged between the inlet pipe (4) and the outlet pipe (6); the extrusion filtering mechanism (8) comprises a filter box (81) and an extrusion conveying mechanism (82); through grooves are provided on both sides of the filter box (81); the extrusion conveying mechanism (82) is arranged in the filter box (81); the extrusion conveying mechanism (82) is used for extruding and filtering the sewage discharged from the inlet pipe (4) to filter the fish feces carried by the sewage, and the filtered sewage is discharged through the through grooves on both sides of the filter box (81); the inlet pipe (4) is connected to the outlet pipe (6) through the filter box (81); the fish feces filtered by the extrusion conveying mechanism (82) is discharged through the outlet pipe (6).

5. A microfiltration device for circulating aquaculture according to claim 4, characterized in that: The extrusion conveying mechanism (82) comprises a first linkage mechanism (826), two pairs of first rotating wheels (821), and a pair of conveyor belts (822); the first rotating wheels (821) are rotatably connected to the filter box (81); one conveyor belt (822) is tensioned on the pair of first rotating wheels (821), and the other conveyor belt (822) is tensioned on the other pair of first rotating wheels (821); the pair of conveyor belts (822) are arranged in parallel; the first linkage mechanism (826) is arranged in the filter box (81), and as the filter drum (2) rotates, the first linkage mechanism (826) drives the pair of conveyor belts (822) to transmit, so as to squeeze and filter the sewage carrying fish feces between the pair of conveyor belts (822); A second rotating wheel is arranged on one of the first rotating wheels (821) in each pair of first rotating wheels (821), and first belts are tensioned on the two second rotating wheels.

6. A microfiltration device for circulating aquaculture according to claim 5, characterized in that: The conveyor belt (822) is provided with a filtering hole (823), and the first rotating wheel (821) is provided with a protrusion (825) adapted to the filtering hole (823); the protrusion (825) at the contact portion between the first rotating wheel (821) and the conveyor belt (822) is inserted into the filtering hole (823).

7. A microfiltration device for circulating aquaculture according to claim 5, characterized in that: A pair of adjusting wheels (824) are rotatably connected inside the filter box (81), and the conveyor belt (822) is tensioned on the adjusting wheels (824); the adjusting wheels (824) are used to adjust the distance between the pair of conveyor belts (822).

8. The microfiltration device for circulating aquaculture according to claim 5, characterized in that: The first linkage mechanism (826) comprises a third rotating wheel (8261), a second belt (8262), a second rotating shaft (8263), a first bevel gear (8264) and a second bevel gear (8265); a fourth rotating wheel is coaxially fixedly arranged inside the filter drum (2); the second rotating shaft (8263) is rotatably connected to the filter box (81); the third rotating wheel (8261) is arranged at one end of the second rotating shaft (8263); the second belt (8262) is tensioned on the fourth rotating wheel and the third rotating wheel (8261); the first bevel gear (8264) is arranged at the other end of the second rotating shaft (8263); the second bevel gear (8265) is coaxially connected to one of the first rotating wheels (821), and the first bevel gear (8264) is meshed with the second bevel gear (8265).

9. A microfiltration device for circulating aquaculture according to claim 5, characterized in that: The control mechanism can be replaced by a second linkage mechanism (827); the first rotating shaft (731) is driven to rotate by the second linkage mechanism (827); the second linkage mechanism (827) is arranged on the filter box (81); the second linkage mechanism (827) comprises a third bevel gear (8271) and a fourth bevel gear (8272); the third bevel gear (8271) is coaxially connected to one of the first rotating wheels (821), the fourth bevel gear (8272) is coaxially connected to the first rotating shaft (731), and the third bevel gear (8271) is meshed with the fourth bevel gear (8272).

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