Microfilter suitable for aquaculture

Abstract

The microstrainer comprises a rack, a filter cartridge, a driving device, a backwashing device, a liquid level switch and an electric cabinet, the filter cartridge is transversely arranged on the rack, the front end of the filter cartridge is open, the rear end of the filter cartridge is closed, a baffle is arranged at the front end of the rack, a water inlet is formed in the baffle, a sealing ring is arranged on the edge of the water inlet, and the filter cartridge is arranged on the rack. The driving device comprises a water pump, a water inlet pipe, a water outlet pipe, a spray head and a pressure alarm, a water inlet of the water pump is connected with the water inlet pipe, a water outlet of the water pump is connected with the water outlet pipe, the water outlet pipe is horizontally arranged above the filter cartridge, and the spray head is connected with the pressure alarm. The pressure alarm is arranged at the joint of the water outlet pipe and the water pump, and the liquid level switch is fixed to the rack and located at the front end of the filter cartridge. Open type water inflow can be achieved, the water inflow amount is large, water pressure is stable, the structural process is simple, and maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a microfiltration machine suitable for aquaculture. Background Technology

[0002] Aquaculture refers to a production activity involving the artificial reproduction and cultivation of aquatic plants and animals. The aquaculture process generates waste such as aquatic excrement and leftover feed, which pollute water bodies and affect the aquatic environment. Therefore, water treatment is necessary to enable the recycling of aquaculture water. Microfilters are commonly used filtration devices in recirculating aquaculture systems, achieving solid-liquid separation by trapping solid particles in the aquaculture water.

[0003] Existing microfiltration machines have a filter cartridge with both ends sealed. One end is connected to a drive device that rotates the filter cartridge, and the other end is connected to a water inlet pipe. The water inlet pipe extends into the filter cartridge, introducing wastewater into the cartridge. After being filtered by the filter screen on the cartridge wall, the wastewater is discharged. The filter cartridge has a sludge collection tank, which is connected to a drain pipe that extends out of the filter cartridge. The water inlet pipe and drain pipe are sealed to the filter cartridge (to prevent wastewater from flowing outside the filter cartridge) but do not rotate with the filter cartridge. The structure and process are complex, and maintenance and cleaning are inconvenient. The closed water inlet structure makes the water entering the filter cartridge bear greater pressure and impact, and there is also a risk of pipe blockage in the water inlet pipe. Utility Model Content

[0004] This invention provides a microfiltration machine suitable for aquaculture, which can achieve open water intake, large water volume and stable water pressure, simple structure and process, convenient maintenance, and no risk of pipe blockage.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0006] A microfiltration machine suitable for aquaculture includes a frame, a filter cartridge, a drive unit, a backwashing device, a level switch, and an electrical control box. The filter cartridge is horizontally mounted on the frame, with an open front end and a closed rear end. A baffle is provided at the front end of the frame, with a water inlet on the baffle. A sealing ring is provided at the edge of the water inlet, and the sealing ring fits tightly against the edge of the filter cartridge opening. The drive unit includes a geared motor, a pinion, and a ring gear. The ring gear is connected to the rear end of the filter cartridge. The output shaft of the geared motor is connected to the pinion, and the pinion meshes with the ring gear. The backwashing device includes a water pump, an inlet pipe, an outlet pipe, a nozzle, and a pressure alarm. The inlet of the water pump is connected to the inlet pipe, and the outlet of the water pump is connected to the outlet pipe. The outlet pipe is horizontally mounted above the filter cartridge and has a nozzle on it. The pressure alarm is located at the connection between the outlet pipe and the water pump. The level switch is fixed on the frame and located inside the front end of the filter cartridge. The geared motor, water pump, pressure alarm, and level switch are electrically connected to the electrical control box.

[0007] Furthermore, the filter cartridge has an end cap at its rear end, a rotating shaft at its center, a large annular gear connected to its outer circumference, a bearing mounted on the rotating shaft, and the bearing connected to the frame via a bearing seat.

[0008] Furthermore, the frame is provided with at least two rollers, which roll against the outer or inner side of the filter cartridge opening.

[0009] Furthermore, the filter cartridge is equipped with a sludge collection tank inside, which is connected to the frame. A drain pipe is provided at the bottom, extending from the open end of the filter cartridge.

[0010] Furthermore, the filter cartridge includes a frame and at least two arc-shaped filter screens. The frame is cylindrical, and the arc-shaped filter screens are detachably connected to the outer wall of the frame via a pressure frame.

[0011] Furthermore, the water pump is a variable frequency vertical multistage centrifugal pump.

[0012] Furthermore, a protective cover is provided on the top of the frame.

[0013] Furthermore, the inlet and outlet pipes are made of PVC pipes.

[0014] Furthermore, the small gear and the ring gear are made of glass fiber reinforced nylon.

[0015] Furthermore, the nozzle is a snap-fit, low-flow fan-shaped nozzle.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model eliminates the water inlet pipe and sets a baffle and water inlet at the open end of the filter cartridge. Sewage flows directly into the filter cartridge through the water inlet, realizing open water intake, with stable water pressure and large water intake, and no risk of pipe blockage.

[0018] 2. This utility model uses gear transmission to drive the filter cartridge to rotate, which has good stability. The gear is made of glass fiber reinforced nylon, which has the characteristics of high toughness, high strength, corrosion resistance and wear resistance, making it more suitable for the aquaculture industry.

[0019] 3. The backwashing device of this utility model adopts a variable frequency vertical multistage centrifugal pump with adjustable backwashing pressure. The outlet pipe is equipped with a pressure alarm. When the pressure in the outlet pipe exceeds the set threshold, an alarm is triggered to prevent pipe bursting or damage to the filter screen. The pressure alarm and the variable frequency vertical multistage centrifugal pump are linked through the electrical control box to achieve precise control of backwashing pressure and energy and water conservation.

[0020] 4. This utility model has a liquid level switch at the open end of the filter cartridge. The liquid level switch detects the liquid level in the filter cartridge. When the liquid level reaches the set liquid level value, the backwashing device is activated to backwash the filter cartridge.

[0021] 5. The filter screen on the filter cartridge of this utility model is detachable, which facilitates maintenance and replacement. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is the internal left view of the present invention;

[0025] Figure 3 This is the internal right view of the present invention;

[0026] Figure 4 This is a schematic diagram of the drive device.

[0027] Figure 5 This is a schematic diagram of the backwashing device.

[0028] Figure 6 This is a schematic diagram of the filter cartridge structure;

[0029] In the diagram: 1-Frame, 2-Protective cover, 3-Drive device, 31-Gear motor, 32-Small gear, 33-Ring gear, 4-Backwashing device, 41-Water pump, 42-Inlet pipe, 43-Outlet pipe, 44-Sprayer head, 45-Pressure alarm, 5-Filter cartridge, 51-Frame, 52-Arc-shaped filter screen, 53-Pressure frame, 6-Drain pipe, 7-Roller, 8-Level switch, 9-Bearing seat, 10-Baffle, 11-Sealing ring, 12-End cap. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] In the description of the embodiments of this application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this application is usually placed in when in use, or the orientation or positional relationship that is commonly understood by those skilled in the art. It is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0032] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Example

[0034] As shown in the figure, a microfiltration machine suitable for aquaculture includes a frame 1, a filter cartridge 5, a drive unit 3, a backwashing device 4, a liquid level switch 8, and an electrical control box (not shown in the figure).

[0035] The filter cartridge 5 has an open front end, and the front end of the frame 1 is equipped with a baffle 10. The baffle 10 has a water inlet, and the edge of the water inlet is equipped with a sealing ring 11, which fits tightly against the edge of the filter cartridge 5's opening. The rear end of the filter cartridge 5 has an end cap 12, with a rotating shaft at its center. A bearing is fitted onto the rotating shaft, and the bearing is connected to the frame via a bearing seat 9, allowing the filter cartridge 5 to rotate. The bearing seat 9 is made of maintenance-free engineering plastic, making it more suitable for the humid, high-salinity environment of aquaculture. It also requires no additional lubrication, saving maintenance costs and time. The frame 1 has two symmetrical rollers 7, which roll against the inner surface of the filter cartridge 5's open end. The filter cartridge 5 includes a frame 51 and eight arc-shaped filter screens 52. The frame 51 is cylindrical, and the filter screens 52 are spliced ​​onto the side wall of the frame 51 via a pressure frame 53, making disassembly and replacement convenient. The frame 51 and pressure frame 53 are made of 304 stainless steel, which is rust-resistant.

[0036] The drive unit 3 includes a geared motor 31, a pinion 32, and a ring gear 33. The ring gear 33 is connected to the outer circumference of the end cover, and its axis coincides with the axis of the filter cartridge 5. The output shaft of the geared motor 31 is connected to the pinion 32, and the pinion 32 meshes with the ring gear 33. The geared motor 31 is a worm gear reducer motor with a large reduction ratio, which ensures smooth operation and high transmission efficiency. The pinion 32 and the ring gear 33 can be made of glass fiber reinforced nylon, which has high toughness, high strength, corrosion resistance, and wear resistance, making it suitable for the aquaculture industry.

[0037] The backwashing device 4 includes a water pump 41, an inlet pipe 42, an outlet pipe 43, a nozzle 44, and a pressure alarm. The water pump 41 is a variable frequency vertical multistage centrifugal pump, which can adjust the backwashing pressure. The inlet of the water pump 41 is connected to the inlet pipe 42, and the outlet of the water pump 41 is connected to the outlet pipe 43. The inlet pipe is located on both sides of the filter cartridge 5, and the outlet pipe 43 is horizontally positioned above the filter cartridge 5. The nozzle 44 is equipped with a snap-on small-flow fan-shaped nozzle, which is easy to replace, has a large backwashing range, low flow rate, and saves water. The inlet pipe 42 and the outlet pipe 43 can be made of PVC pipe, which is corrosion-resistant and easy to install.

[0038] A pressure alarm 45 is installed at the connection between the outlet pipe 43 and the water pump 41. The pressure alarm 45 is a device used to monitor pressure changes and issue an alarm signal when the pressure exceeds a set range; it can be directly selected from existing commercially available products. A pressure threshold is set according to actual conditions; an alarm is triggered when the detected pressure exceeds the set threshold to prevent pipe bursts or filter damage. By linking the pressure alarm 45 with the variable frequency pump control, precise control of backwashing pressure and energy-saving and water-saving features can be achieved. A level switch 8 is fixed on the frame 1 and located inside the front end of the filter cartridge 5. It can detect the liquid level inside the filter cartridge 5 and at the inlet, and issue a signal when the liquid level reaches a preset height. The geared motor 31, water pump 41, pressure alarm 45, and level switch 8 are electrically connected to the control box. The control box can receive signals from the pressure alarm 45 and level switch 8, thereby controlling the operation of the geared motor 31 and water pump 41.

[0039] The filter cartridge 5 is equipped with a sludge collection tank inside, which is used to collect solid waste that falls from the top of the filter cartridge 5. The sludge collection tank is connected to the frame 1, and a drain pipe 6 is provided at the bottom. The drain pipe 6 extends from the open end of the filter cartridge 5 to discharge solid waste.

[0040] The top of the frame 1 is equipped with a protective cover 2 to prevent water splashing.

[0041] This invention employs an open-type water inlet, allowing for a large water intake and stable water pressure. It is suitable for large-scale filtration systems where multiple microfilters can simultaneously receive and filter water. For example, an inlet channel can be installed, with multiple microfilters of this invention installed along its length. The front end of the frame 1 of each microfilter is embedded in the wall of the inlet channel, with sealed edges. Aquaculture water (sewage) is first introduced into the inlet channel, then enters the filter cartridge 5 through its open end, is filtered by the filter screen, and is discharged. The level switch 8 can be preset to the level value at which the backwashing device will start. Solid particles in the water are intercepted by the filter screen on the filter cartridge 5. As more and more solid particles are intercepted, the filtration efficiency of the filter cartridge 5 decreases, and the liquid level inside the filter cartridge 5 and near the inlet gradually rises. When the liquid level reaches the preset value, a signal is sent to the electrical control box, which controls the geared motor 31 and the water pump 41 to start. The gears rotate, driving the filter cartridge 5 to rotate. The water pump 41 draws clean water filtered from outside the filter cartridge 5 through the inlet pipe 42 and sprays it out through the outlet pipe 43, backwashing away the solid particles on the filter screen. The solid particles fall into the sludge collection tank and are discharged through the drain pipe 6. Generally, the preset value of the level switch 8 is set below the sludge collection tank to prevent water from overflowing the sludge collection tank and carrying away the collected solid particles. The electrical control box of this utility model is equipped with a timer device, which can set the flushing time. The timer starts from the start of the backwashing device. When the flushing time reaches the set value, the electrical control box controls the water pump 41 to stop working, the water level drops, the filtration efficiency of the filter cartridge 5 is restored, and it continues to work.

[0042] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A microfiltration machine suitable for aquaculture, characterized in that: The system includes a frame (1), a filter cartridge (5), a drive unit (3), a backwashing device (4), a level switch (8), and an electrical control box. The filter cartridge (5) is horizontally mounted on the frame (1). The front end of the filter cartridge (5) is open, and the rear end is closed. A baffle (10) is provided at the front end of the frame (1). An inlet is provided on the baffle (10), and a sealing ring (11) is provided on the edge of the inlet. The sealing ring (11) fits tightly with the edge of the opening of the filter cartridge (5). The drive unit (3) includes a geared motor (31), a pinion (32), and a ring gear (33). The ring gear (33) is connected to the rear end of the filter cartridge. The output shaft of the geared motor (31) is connected to the pinion (32), and the pinion (32) meshes with the ring gear (33). The backwashing device (4) includes a water pump (41), an inlet pipe (42), an outlet pipe (43), a nozzle (44), and a pressure alarm (45). The inlet of the water pump (41) is connected to the inlet pipe (42), and the outlet of the water pump (41) is connected to the outlet pipe (43). The outlet pipe (43) is horizontally positioned above the filter cartridge (5). The nozzle (44) is provided on the outlet pipe (43). The pressure alarm (45) is located at the connection between the outlet pipe (43) and the water pump (41). The level switch (8) is fixed on the frame (1) and is located inside the front end of the filter cartridge (5). The geared motor (31), the water pump (41), the pressure alarm (45), and the level switch (8) are electrically connected to the control box.

2. The microfiltration machine for aquaculture according to claim 1, characterized in that: The filter cartridge (5) has an end cap (12) at its rear end. The end cap (12) has a rotating shaft at its center and a large ring gear (33) connected to its outer circumference. A bearing is fitted on the rotating shaft and the bearing is connected to the frame (1) through a bearing seat (9).

3. The microfiltration machine for aquaculture according to claim 1, characterized in that: The frame (1) is provided with at least two rollers (7), which roll against the outer or inner side of the filter cartridge (5) opening.

4. The microfiltration machine for aquaculture according to claim 1, characterized in that: The filter cartridge (5) is provided with a sludge collection tank inside, which is connected to the frame (1). A drain pipe (6) is provided at the bottom, which extends from the opening end of the filter cartridge (5).

5. The microfiltration machine for aquaculture according to claim 1, characterized in that: The filter cartridge (5) includes a frame (51) and at least two arc-shaped filter screens (52). The frame (51) is cylindrical, and the arc-shaped filter screens (52) are detachably connected to the outer wall of the frame (51) by a pressure frame (53).

6. The microfiltration machine for aquaculture according to claim 1, characterized in that: The water pump (41) is a variable frequency vertical multistage centrifugal pump.

7. The microfiltration machine for aquaculture according to claim 1, characterized in that: The top of the frame (1) is equipped with a protective cover (2).

8. The microfiltration machine for aquaculture according to claim 1, characterized in that: The inlet pipe (42) and outlet pipe (43) are PVC pipes.

9. The microfiltration machine for aquaculture according to claim 1, characterized in that: The small gear (32) and the ring gear (33) are made of glass fiber reinforced nylon.

10. The microfiltration machine for aquaculture according to claim 1, characterized in that: The nozzle (44) is a snap-fit ​​small flow fan-shaped nozzle.

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