A self-cleaning lamination filter

Abstract

A kind of self-cleaning laminated filter, including shell, skeleton is arranged in shell, membrane is set outside skeleton, water inlet and water outlet are equipped at the end of shell, water enters shell interior from water inlet, after being filtered by membrane, it enters the inside end of skeleton, and is discharged from water outlet by the end of skeleton;Channel is equipped in the inside of skeleton, multiple nozzles are opened in the side of skeleton and are communicated with channel, backflush port is equipped at the end of shell, when backflush, clean water enters shell interior from backflush port, and is sprayed from nozzle to carry out backflushing to membrane after being passed through channel in skeleton;The utility model is simple and ingenious, convenient to use, can realize automatic control, need not to replace filter element, filtering effect is high, and adopts booster nozzle, and self-cleaning effect is good.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a self-cleaning disc filter. Background Technology

[0002] With the large-scale centralized planting of land, the irrigation of farmland and gardens, especially in areas with dry climates and strong sunlight that require drip irrigation, has created a greater demand for filters, mainly reflected in: 1. The filter, combined with sensors and controlled by a PLC, enables intelligent remote control, saving labor costs; 2. Durable and does not require frequent replacement of filter elements; 3. The filtration accuracy reaches 120 mesh or higher; 4. It has a self-cleaning function.

[0003] Many domestic manufacturers have begun research and development on this technology, but the following problems exist in its current use: 1. The rectangular ring sealing surface is flat, making it prone to leakage and unfavorable for sealing; 2. Most sealing parts use Y-rings, which are not conducive to backwashing. Y-rings are unidirectional seals, providing sealing during forward filtration but causing leakage during reverse filtration; 3. It is difficult to visually distinguish the fine grooves on the surface of discs with different filtration accuracies; 4. The grooves on both sides of the discs point from the outer diameter to the center, which is not conducive to the self-cleaning of the discs during backwashing; 5. The backwashing channel is a simple filtration channel, resulting in poor backwashing effect. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a self-cleaning disc filter, which effectively solves the above-mentioned problems.

[0005] The technical solution to the technical problem is: a self-cleaning disc filter, including a shell, a frame inside the shell, a membrane outside the frame, an inlet and an outlet at the end of the shell, water enters the shell from the inlet, is filtered by the membrane and enters the inner end of the frame, and is discharged from the outlet through the end of the frame. The frame has a channel inside, and multiple nozzles connected to the channel are opened on the side of the frame. The end of the shell has a backwash port. During backwashing, clean water enters the shell from the backwash port, passes through the channel inside the frame, and is sprayed out from the nozzle to backwash the membrane.

[0006] Preferably, the diaphragm is provided with an end cap at its end, a pressure cap is provided between the end cap and the inner end of the outer shell, and a spring is provided between the pressure cap and the end cap.

[0007] Preferably, the end of the skeleton is provided with swirl blades.

[0008] Preferably, O-rings are provided between the skeleton and the outer shell, the skeleton and the end cap, and the end cap and the pressure cap.

[0009] Preferably, the end of the frame is provided with a one-way valve, which consists of two semi-circular baffles hinged to the end of the frame. The semi-circular baffles are fixed to the end of the frame by torsion springs and can only be opened by rotating towards the outlet.

[0010] This invention is simple and ingenious, easy to use, and can achieve automatic control without replacing filter elements. It has a high filtration effect and uses a pressurized nozzle, which has a good self-cleaning effect. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a self-cleaning disc filter according to the present invention.

[0012] Figure 2 This is a cross-sectional schematic diagram of a self-cleaning disc filter according to the present invention.

[0013] Figure 3 This is a schematic diagram of the skeleton structure in a self-cleaning disc filter according to this utility model.

[0014] Figure 4 This is a top view schematic diagram of the skeleton in a self-cleaning disc filter according to this utility model. Detailed Implementation

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] Depend on Figures 1 to 4 It is known that a self-cleaning disc filter includes a housing 1, a frame 2 is provided inside the housing 1, a membrane 3 is sleeved on the outside of the frame 2, an end cap 9 is provided at the end of the membrane 3, a pressure cap 10 is provided between the end cap 9 and the inner end of the housing 1, a spring 11 is provided between the pressure cap 10 and the end cap 9, and an inlet 4 and an outlet 5 are provided at the end of the housing 1. Water enters the interior of the housing 1 from the inlet 4, is filtered by the membrane 3, enters the inner end of the frame 2, and is discharged from the outlet 5 through the end of the frame 2. The frame 2 has a channel 6 inside, and multiple nozzles 7 connected to the channel 6 are opened on the side of the frame 2. The end of the outer shell 1 is provided with a backwash port 8. During backwashing, clean water enters the interior of the outer shell 1 from the backwash port 8, passes through the channel 6 inside the frame 2, and is sprayed out from the nozzles 7 to backwash the membrane 3.

[0017] In practical use, this utility model In operation, under the pressure of spring 11 and water pressure, a certain number of membranes 3 are pressed together to form a filter unit. Clean water flows from the outside through the grooves on the stacked plates to the outlet 5. Impurities and dirt are intercepted outside the membranes 3. When the impurities and dirt reach a certain level, they will block the small grooves between the membranes 3, and a certain pressure difference will be formed between the inlet 4 and the outlet 5. When the pressure difference reaches the set value, the self-cleaning function will be automatically activated. The water is pressurized by the booster nozzle 7 and then flushes the membranes 3 from the inside. The membranes 3 push the spring 11 and then disperse, and the impurities and dirt are flushed out and discharged from the filter through the drain port 14.

[0018] The frame 2 is equipped with swirl vanes 12 at its end, which can reduce the impact of water flow on the membrane 3 during opening and closing, and at the same time make the water flow form a swirling flow, which plays a stirring role inside, making it easier for water to enter the filter element and improve filtration efficiency.

[0019] O-rings are provided between the skeleton 2 and the outer shell 1, between the skeleton 2 and the end cap 9, and between the end cap 9 and the pressure cap 10. The rectangular contact surface is changed to a ring contact, which reduces the sealing contact area and increases the sealing reliability compared with the planar seals on the market.

[0020] The frame 2 is provided with a one-way valve 13 at its end. The one-way valve 13 consists of two semi-circular baffles hinged to the end of the frame 2. The semi-circular baffles are fixed to the end of the frame 2 by torsion springs. The semi-circular baffles can only be rotated to open in the direction of the water outlet 5. During backwashing, the semi-circular baffles are closed under the action of the torsion springs and water pressure, and water is sprayed out from the nozzle 7 to backwash the diaphragm 3.

[0021] The grooves on the diaphragm 3 are designed with intersecting diagonal lines, which makes it easier for them to disperse and rotate in opposite directions during backwashing, thus facilitating the discharge of dirt and impurities.

[0022] Different colors are used for membranes with different filtration precision to facilitate identification by assembly personnel and prevent incorrect installation.

[0023] Compared with the prior art, this utility model has the following advantages: Modify the type of sealing ring to make the seal more reliable; When paired with a pressure sensor and PLC system, it can achieve automatic control and automatic self-cleaning without the need to replace filter elements; It has high filtration efficiency and can connect multiple filters in parallel to increase flow rate; The filter's internal frame is equipped with a one-way valve at the end, and a separate channel is used for backwashing. It is also designed with additional nozzles for better self-cleaning effect. The main materials are plastic and rubber, which will not rust and avoid polluting water sources.

Claims

1. A self-cleaning disc filter, characterized in that, It includes an outer shell (1), a frame (2) is provided inside the outer shell (1), a membrane (3) is fitted outside the frame (2), and an inlet (4) and an outlet (5) are provided at the end of the outer shell (1). Water enters the interior of the outer shell (1) from the inlet (4), is filtered by the membrane (3), enters the inner end of the frame (2), and is discharged from the outlet (5) through the end of the frame (2). The skeleton (2) has a channel (6) inside, and multiple nozzles (7) connected to the channel (6) are opened on the side of the skeleton (2). The shell (1) has a backwash port (8) at the end. When backwashing, clean water enters the shell (1) from the backwash port (8), passes through the channel (6) inside the skeleton (2), and is sprayed out from the nozzle (7) to backwash the membrane (3).

2. The self-cleaning disc filter according to claim 1, characterized in that, The diaphragm (3) is provided with an end cap (9) at its end, and a pressure cap (10) is provided between the end cap (9) and the inner end of the outer shell (1), and a spring (11) is provided between the pressure cap (10) and the end cap (9).

3. A self-cleaning disc filter according to claim 1, characterized in that, The frame (2) is provided with swirl blades (12) at its end.

4. A self-cleaning disc filter according to claim 2, characterized in that, O-rings are provided between the skeleton (2) and the shell (1), between the skeleton (2) and the end cap (9), and between the end cap (9) and the pressure cap (10).

5. A self-cleaning disc filter according to claim 1, characterized in that, The frame (2) is provided with a one-way valve (13) at the end. The one-way valve (13) consists of two semi-circular baffles hinged to the end of the frame (2). The semi-circular baffles are fixed to the end of the frame (2) by torsion springs. The semi-circular baffles can only be rotated to open in the direction of the water outlet (5).

Images