Three-layer step grading filter

Abstract

The utility model discloses a three-layer step grading filter which comprises a first filter screen, the upper surface of the first filter screen is fixedly connected with a first end head cover, the inner side of the first end head cover is in threaded connection with a second end head cover, and the lower surface of the second end head cover is fixedly connected with a second filter screen. And the inner surface of the second end cover is in threaded connection with a third end cover. According to the utility model, three layers of filter structures are set according to the sizes of the impurities in the air by designing three stages of filter screens, so that the filtering precision of the filter material is set in a targeted manner for each layer, the purpose of higher filtering precision is achieved, and the impurities with different volumes can be filtered by designing different filtering precision of each layer. The end covers are designed, so that the aim of prolonging the service life of the filter is fulfilled, the end covers can be separately replaced according to the actual use condition of each layer, and the aim of prolonging the service life is fulfilled.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a three-layer stepped grading filter. Background Art

[0002] Currently, filters are widely used in the metallurgical, chemical, petroleum, papermaking, pharmaceutical, food, mining, electric power, and municipal water supply sectors. These applications include filtering industrial wastewater, circulating water, regenerating emulsions, filtration and treatment of waste oil, continuous casting water systems in the metallurgical industry, blast furnace water systems, and high-pressure water descaling systems for hot rolling mills. This advanced, efficient, and easy-to-operate fully automatic filtration device consists of a cylinder, stainless steel filter screen, a sewage discharge unit, a transmission mechanism, and an electrical control unit. When the filter is operating, water to be filtered flows through the filter screen from the water inlet. To ensure stable and efficient operation of production equipment, harmful particulate impurities in the air required by the equipment and workshops must be separated and purified by filters. Air filtration is also widely used, and the size of harmful impurities in the air ranges from less than 1 micron to several millimeters.

[0003] The current filter can only set the filtration accuracy by taking the middle value according to the size of the impurities in the air for the first layer, and cannot achieve targeted and accurate filtration. The current filter will cause harmful impurities of different sizes to remain on the same filter material surface, accelerating the clogging of the filter material pores, thereby resulting in a short filter life. The current three-layer stepped filter will cause the filter mesh that does not need to be replaced to be replaced when the filter is replaced, resulting in waste. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a three-layer stepped filter.

[0005] In order to achieve the above-mentioned object, the utility model adopts the following technical solution: a three-layer stepped graded filter, comprising a first filter screen, the upper surface of the first filter screen is fixedly connected to a first end head cover, the inner side of the first end head cover is threadedly connected to a second end head cover, the lower surface of the second end head cover is fixedly connected to a second filter screen, the inner surface of the second end head cover is threadedly connected to a third end head cover, and the lower surface of the third end head cover is fixedly connected to a third filter screen;

[0006] An air outlet duct is provided inside the third filter screen, a first dust collecting trough is fixedly connected to the lower surface of the first filter screen, a second dust collecting trough is fixedly connected to the lower surface of the second filter screen, and a third dust collecting trough is fixedly connected to the lower surface of the third filter screen.

[0007] As a further description of the above technical solution:

[0008] The filtering levels of the first filter, the second filter and the third filter increase in sequence.

[0009] As a further description of the above technical solution:

[0010] A first cavity is formed between the second filter screen and the first filter screen, and the second filter screen is arranged in a folded shape.

[0011] As a further description of the above technical solution:

[0012] A second cavity is formed between the second filter screen and the third filter screen. The first end head cover and the second end head cover are annular, and the third end head cover is solid.

[0013] As a further description of the above technical solution:

[0014] The first dust collecting groove is communicated with the atmosphere, and the second dust collecting groove is communicated with the first cavity.

[0015] As a further description of the above technical solution:

[0016] The third dust collecting groove is communicated with the second cavity, and the first dust collecting groove, the second dust collecting groove and the third dust collecting groove are all annular.

[0017] As a further description of the above technical solution:

[0018] The first dust collecting groove is in contact with the second dust collecting groove, and the second dust collecting groove is in contact with the third dust collecting groove.

[0019] As a further description of the above technical solution:

[0020] The inner diameter of the third dust collecting trough is the same as that of the air outlet pipe. The outer surfaces of the second filter screen and the third filter screen are provided with a steel mesh, and the aperture of the steel mesh is 5 times the aperture of the second filter screen and the third filter screen.

[0021] The utility model has the following beneficial effects:

[0022] Compared with the existing technology, the three-layer stepped grading filter designs a three-level filter mesh and sets a three-layer filtration structure according to the size of impurities in the air, so as to achieve targeted setting of the filtration accuracy of the filter material in each layer and achieve the purpose of higher filtration accuracy.

[0023] Compared with the existing technology, the three-layer stepped filter is designed with different filtration precision of each layer, so that impurities of different volumes are retained on the surface of the filter material with corresponding filtration precision, thereby achieving the purpose of extending the service life of the filter.

[0024] Compared with the existing technology, the three-layer stepped filter can be replaced separately according to the actual usage of each layer through the design of the end cover, thereby achieving the purpose of prolonging the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the internal structure of the three-layer stepped grading filter proposed in the utility model;

[0026] Figure 2 for Figure 1 A schematic diagram of the structure at center A;

[0027] Figure 3 This is a top view of the three-layer stepped filter proposed in the present invention;

[0028] Figure 4 This is a schematic diagram of the overall structure of the three-layer stepped grading filter proposed in the present invention.

[0029] Legend:

[0030] 1. First filter; 2. Second filter; 3. Third filter; 4. First end cap; 5. Second end cap; 6. Third end cap; 7. First cavity; 8. Second cavity; 9. Air outlet duct; 10. First dust collecting trough; 11. Second dust collecting trough; 12. Third dust collecting trough. DETAILED DESCRIPTION

[0031] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating directions or positional relationships, are 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. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention. The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections, indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Reference Figure 1-4 The utility model provides a three-layer stepped grading filter: it includes a first filter screen 1, the upper surface of the first filter screen 1 is fixedly connected to the first end head cover 4, the inner side of the first end head cover 4 is threadedly connected to the second end head cover 5, the lower surface of the second end head cover 5 is fixedly connected to the second filter screen 2, the inner surface of the second end head cover 5 is threadedly connected to the third end head cover 6, and the lower surface of the third end head cover 6 is fixedly connected to the third filter screen 3. The filtration levels of the first filter screen 1, the second filter screen 2, and the third filter screen 3 increase in sequence. A first cavity 7 is formed between the second filter screen 2 and the first filter screen 1, the second filter screen 2 is arranged in a folded type, and a second cavity 8 is formed between the second filter screen 2 and the third filter screen 3. The first end head cover 4 and the second end head cover 5 are annular, and the third end head cover 6 is solid.

[0034] The interior of the third filter screen 3 is provided with an air outlet pipe 9, and the air outlet pipe 9 is used for air outlet. The lower surface of the first filter screen 1 is fixedly connected with a first dust collecting groove 10, and the first dust collecting groove 10 is used to collect dust, thereby improving the service life of the first filter screen 1. The first dust collecting groove 10 is communicated with the atmosphere, the second dust collecting groove 11 is communicated with the first cavity 7, the first dust collecting groove 10 is in contact with the second dust collecting groove 11, and the second dust collecting groove 11 is in contact with the third dust collecting groove 12. The lower surface of the second filter screen 2 is fixedly connected with the second dust collecting groove 11, and the lower surface of the third filter screen 3 is fixedly connected with the third dust collecting groove 12, and the third dust collecting groove 12 is communicated with the second cavity 8. The first dust collecting groove 10, the second dust collecting groove 11, and the third dust collecting groove 12 are all annular. The inner diameter of the third dust collecting groove 12 is the same as that of the air outlet pipe 9. The outer surfaces of the second filter screen 2 and the third filter screen 3 are provided with a steel mesh. The aperture of the steel mesh is 5 times the aperture of the second filter screen 2 and the third filter screen 3.

[0035] Working principle: The first filter 1, the second filter 2 and the third filter 3 are fixed by the first end head cover 4, the second end head cover 5 and the third end head cover 6. The airflow passes through the first filter 1 and the debris falls into the first dust collecting trough 10. The airflow passes through the second filter 2 and the third filter 3 in turn, and the debris falls into the second dust collecting trough 11 and the third dust collecting trough 12 respectively. When a filter needs to be replaced, it is replaced through the corresponding end cover.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A three-layer stepped filter, comprising a first filter screen (1), characterized in that: The upper surface of the first filter screen (1) is fixedly connected to a first end cap (4), the inner side of the first end cap (4) is threadedly connected to a second end cap (5), the lower surface of the second end cap (5) is fixedly connected to a second filter screen (2), the inner surface of the second end cap (5) is threadedly connected to a third end cap (6), and the lower surface of the third end cap (6) is fixedly connected to a third filter screen (3); An air outlet duct (9) is arranged inside the third filter screen (3); a first dust collecting groove (10) is fixedly connected to the lower surface of the first filter screen (1); a second dust collecting groove (11) is fixedly connected to the lower surface of the second filter screen (2); and a third dust collecting groove (12) is fixedly connected to the lower surface of the third filter screen (3).

2. The three-layer stepped filter according to claim 1 is characterized in that: The filtering levels of the first filter screen (1), the second filter screen (2), and the third filter screen (3) increase in sequence.

3. The three-layer stepped filter according to claim 1 is characterized in that: A first cavity (7) is formed between the second filter screen (2) and the first filter screen (1), and the second filter screen (2) is arranged in a folded shape.

4. The three-layer stepped filter according to claim 1 is characterized in that: A second cavity (8) is formed between the second filter screen (2) and the third filter screen (3); the first end cap (4) and the second end cap (5) are annular; and the third end cap (6) is solid.

5. The three-layer stepped filter according to claim 1 is characterized in that: The first dust collecting groove (10) is in communication with the atmosphere, and the second dust collecting groove (11) is in communication with the first cavity (7).

6. The three-layer stepped filter according to claim 1, characterized in that: The third dust collecting groove (12) is in communication with the second cavity (8); the first dust collecting groove (10), the second dust collecting groove (11) and the third dust collecting groove (12) are all annular.

7. The three-layer stepped filter according to claim 1, characterized in that: The first dust collecting groove (10) contacts the second dust collecting groove (11), and the second dust collecting groove (11) contacts the third dust collecting groove (12).

8. The three-layer stepped filter according to claim 1 is characterized in that: The inner diameter of the third dust collecting trough (12) is the same as that of the air outlet pipe (9); the outer surfaces of the second filter screen (2) and the third filter screen (3) are provided with a steel mesh, the aperture of which is 5 times that of the second filter screen (2) and the third filter screen (3).

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