CN201404725Y - Automatic backwash filter - Google Patents

Abstract

The utility model relates to an automatic backwashing filter, which is an automatic backwashing filter which can use its own pressure to flush the filter element when the filter element is blocked, and automatically restore the filter function without affecting normal operation. It includes a cylinder with a liquid outlet on it, a lower shell with a liquid inlet and a sewage outlet on it, and a motor at the lower end of the entire device. The structure is simple, the design is reasonable, and the space utilization rate is high. This automatic backwash filter has three forms: manual, electric and intelligent, and is suitable for filtering impurity particles in various water, oil, steam (gas), and has a wide range of applications.

Description

Automatic backwash filter

【Technical field】

The utility model relates to an automatic backwashing filter, in particular to an automatic backwashing filter which can use its own pressure difference to automatically restore the filter function without affecting the normal automatic backwashing filter when the filter element of the filter is blocked. device, belonging to the field of filters.

【Background technique】

With the advancement of society, the development of science and technology, and the improvement of people's quality of life, new requirements have been put forward for the protection of the natural environment, especially in the fields of chemical industry, petroleum, seawater and other fields that need to be filtered. In order to achieve the purpose of meeting the conditions of use and protecting the environment.

Using a filter that cannot be automatically backwashed, the filter needs to be disassembled after the filter element is clogged, and the filter element is taken out for cleaning, resulting in a pause in production and a decrease in work efficiency; at the same time, it will also cause environmental pollution on the dismantling site, especially in dismantling and utilization. The pollution to the environment is particularly serious when the toxic medium realizes the filtering function of the filter.

Existing backwash filters, especially high-pressure and high-flow backwash filters, currently mainly rely on imported products, but the cost of using imported products is too high, difficult to maintain, and has large limitations. For example, the current filter filters produced by major international companies Most of the devices use a motor installed on the upper part of the entire equipment, and a long transmission shaft drives the sewage arm to rotate, thus increasing the space occupancy rate of the entire equipment, and the disassembly and assembly are complicated, which reduces the reliability of the entire equipment.

At present, there are only a few manufacturers of backwash filters in our country, and most of them imitate similar foreign equipment, lack of novelty, rough workmanship, low reliability, filtration accuracy cannot meet the requirements, and the applicable environment is single, so it is difficult to realize multiple functions of one machine.

【Content of invention】

The purpose of the utility model is to provide an automatic backwash filter with simpler structure, more reasonable design, more convenient manufacture, energy saving and low cost.

In order to achieve the above purpose, the utility model has invented a new type of automatic backwash filter on the basis of summarizing the advanced technologies at home and abroad. Valve 5, sewage pipe 6, reduction motor 7, bracket 8, pressure gauge 9, lower casing 10, transmission shaft 11, tray 12, and cylinder 13.

The technical solution adopted by the utility model: the reduction motor 7 is installed at the lower end of the whole equipment, which effectively reduces the space occupancy rate of the equipment, increases the stability of the equipment, and makes the structure of the whole equipment more compact; the tray 12 is driven by the transmission shaft 11 Rotating around the central axis, since the multi-element filter elements 4 are evenly distributed on the tray 12, the force on each filter element is even during the sewage discharge operation, and the fixing strength of the filter element is high.

The utility model is designed in three forms: manual, automatic and intelligent, and can be matched with filter elements of various materials and structures, and is applicable to a wider range of fields.

【Description of drawings】

The accompanying drawing is a schematic diagram of the structure of the automatic backwash filter.

In the figure: upper flange 1, filter element support frame 2, pressure gauge 3, liquid outlet 30, multi-element filter element 4, automatic control valve 5, sewage pipe 6, geared motor 7, bracket 8, pressure gauge 9, liquid inlet 90 , Lower housing 10, transmission shaft 11, tray 12, cylinder 13.

【Detailed ways】

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in the figure, the automatic backwash filter provided by the embodiment includes an upper flange 1, a filter element support frame 2, a liquid outlet pressure gauge 3, a multi-element filter element 4, an automatic control valve 5, a sewage pipe 6, a gear motor 7, and a bracket 8. Liquid inlet pressure gauge 9, lower casing 10, transmission shaft 11, tray 12, cylinder 13.

The multi-element filter element 4 can be an integral filter element. This example preferably includes a plurality of small filter elements independent of each other. A rotating body is formed between the shelf and the tray 12; in order to ensure the rotation stability of the multi-element filter element 4, the center of gravity of the multi-element filter element 4 can be made to fall on the rotation axis of the above-mentioned rotating body.

The protruding shaft end on the upper part of the filter element support frame 2 cooperates with the hole on the flange 1 to position the filter element support frame 2 in the axial direction to ensure the rotatable connection between the two; the geared motor 7 is connected to the transmission shaft 11, The transmission shaft 11 is connected with the tray 12 through a key, so that the reduction motor 7 can drive the rotating body formed by the multi-element filter element 4 , the tray 12 and the filter element support frame 2 to rotate through the transmission shaft 11 .

The tray 12 is located between the cylinder body 13 and the lower casing 10, the sewage pipe 6 is welded on the lower casing 10, and the end protruding inward forms an inner opening end, and the inner opening end fits with the lower surface of the tray 12 to form a seal. surface, to prevent liquid from leaking from the mating surface between the inner opening end of the sewage pipe 6 and the tray 12; the outer mouth of the sewage pipe 6 is connected with an automatic control valve 5, and the pressure of the automatic control valve 5 in the sewage pipe 6 reaches When the preset value is reached, it will be automatically opened to allow the liquid to be discharged from the drain pipe 6. At the same time, the control circuit of the reduction motor 7 can also be connected with the automatic control valve 5, so that the reduction motor 7 can be started automatically when the automatic control valve 5 is automatically opened. At the same time, the tray 12 has at least one return port 120. When the tray 12 rotates, the return port can communicate with the opening of the inner opening end of the sewage pipe 6; The inner opening ends communicate with each other.

The lower part of the lower housing 10 has a liquid inlet 90, and a pressure gauge 9 is installed next to the liquid inlet 90 to detect the pressure of the liquid in the liquid inlet 90; Pressure gauge 3 for detecting pressure,

The filtration process is shown in the accompanying drawings. The turbid liquid enters the filter lower housing 10 from the liquid inlet 90, enters the multi-component filter element 4 through the tray 12 for filtration, and the filtered clean liquid flows out of the filter through the liquid outlet 30. The turbid liquid The impurities in are isolated in the multi-component filter element 4. At this time, the automatic control valve 6 remains closed, and the liquid cannot be discharged from the sewage pipe 6.

After filtering for an appropriate time, the impurities in the multi-component filter element 4 gradually increase, the flow rate of the multi-component filter element 4 gradually decreases, and the pressure difference between the liquid inlet 90 and the liquid outlet 30 increases gradually. When the pressure between the two When the difference reaches the set value; the pressure in the sewage pipe 6 reaches the predetermined value, the automatic control valve 5 is opened, and the deceleration motor 7 starts at the same time, and the deceleration motor 7 drives the tray 12 to rotate through the transmission shaft 11; during the rotation of the tray 12, the multi-element filter element 4 also starts to rotate, and the multi-full return ports on the tray 12 are aligned with the opening of the sewage pipe 6 one by one, and the filtered net liquid in the cylinder 13 flows to the sewage pipe 6, coupled with the relatively large recoil force caused by the rotation of the reduction motor 7 , the impurities on the multi-element filter element 4 can be washed away; and the impurities are discharged from the filter by the sewage pipe 6; the tray 12 rotates one week to make each small filter element of the multi-element filter element 4 complete a backwash; when the impurities of the multi-element filter element 4 are less , the flow rate increases, and the pressure difference between the liquid outlet 30 and the liquid inlet 30 decreases at this time; 6 is closed, and the deceleration motor 7 stops running thereupon, and is in a standby state, and such a blowdown flushing process ends.

During the entire backwashing process, the liquid inlet 90 continues to flow into the turbid liquid, and the filtering work does not stop during the sewage discharge process, so there is no need to stop the machine, thereby improving the working efficiency of the filter.

Claims (9)

1. An automatic backwash filter, comprising a cylinder (13) and a multi-element filter element (4), characterized in that it also includes a filter element support frame (2), a tray (12), a lower housing (10), and an automatic control valve (5) and sewage pipe (6); the lower casing (10) is connected to the lower end of the cylinder (13) to form a closed cavity, and the two ends of the multi-element filter element (4) are respectively connected to the filter element support frame (2 ) and the tray (12) are fixed; the filter support frame (2) is rotatably installed in the cylinder (13); the tray (12) is rotatably installed on the lower housing (10), and has at least one Return port (120); automatic control valve (5) is installed on the outer end of the sewage pipe (6), and the inner end of the sewage pipe (6) extends into the space between the lower casing (10) and the tray (12), and the inner The inner opening end of the end cooperates with the lower surface of the tray (12), so that when the tray (12) rotates, the return port (120) communicates with the inner opening end. 2. The automatic backwash filter according to claim 1, characterized in that it also has a geared motor (7), and the geared motor (7) drives the tray (12) to rotate. 3. The automatic backwashing filter according to claim 2, characterized in that the control circuit of the deceleration motor (7) is connected to the automatic control valve (5), so that the automatic control valve (5) controls the deceleration motor ( 7). 4. The automatic backwash filter according to claim 3, characterized in that it also includes a transmission shaft (11), the inner end of the transmission shaft (11) is connected with the tray (12), and the outer end extends out of the lower shell Outside the body (10), the geared motor (7) is connected to the outer end of the transmission shaft (11). 5. The automatic backwash filter according to claim 1, characterized in that, the multi-element filter element (4) includes a plurality of independent small filter elements. 6. The automatic backwash filter according to claim 5, characterized in that, the tray (12) has a plurality of return ports (120) arranged in a circumferential direction, and the return ports (120) are respectively connected to the small The center holes of the filter elements are opposite. 7. The automatic backwash filter according to any one of claims 1-4, characterized in that, the tray (12) has a plurality of return ports (120) arranged in a circumferential direction, so that the tray (12) ) when rotating, make the return port (120) communicate with the inner opening end of the blowdown pipe (6) in sequence. 8. The automatic backwash filter according to claim 7, characterized in that, the multi-element filter element (4) includes a plurality of small filter elements independent of each other. 9. The automatic backwash filter according to claim 8, characterized in that, the return ports (120) are respectively opposite to the central holes of the small filter elements.