An automatic backwashing slurry magnetic filter

Abstract

The present invention relates to an automatic backwashing slurry magnetic filter, which at least includes upper and lower shells, inlet and outlet connecting pipes, a filter mesh core, a filter mesh core driving assembly, a magnetic iron removal and adsorption unit, a magnetic iron removal and adsorption unit hydraulic lifting assembly, a magnetic iron removal and adsorption unit protective sleeve, and a sewage discharge pipe. It is characterized in that: the slurry to be filtered enters the interior of the filter through the inlet connecting pipe on the lower shell, impurities in the slurry are filtered out by the filter screen and adhere to the inner wall of the filter mesh core, iron-containing impurities are adsorbed by the magnetic iron removal and adsorption unit on the magnetic iron removal and adsorption unit protective sleeve, the filtered clean slurry flows out through the outlet connecting pipe on the lower shell, the filter mesh core is rotated clockwise, and the filter mesh core at the corresponding outlet position rotates to the inlet position, and the slurry flowing into the filter screen will backwash the back of the filter mesh core to carry out cleaning and sewage discharge.

Description

Technical Field

[0001] The present invention relates to an automatic backwashing slurry magnetic filter, which is mainly used to remove foreign matters, debris and ferromagnetic impurities in liquids and slurries, and is widely applicable to industries such as ceramics, electricity, heat, mining, plastics, chemical engineering, rubber, pharmaceuticals, food, environmental protection, pigments, dyes, electronics, and metallurgy. Background Art

[0002] Slurry filters generally have two forms: manual and automatic. According to the degree of dirtiness of the slurry and its properties, the action form of the filter is selected. Generally, the automatic cleaning method is mostly used. However, due to the limited filtration accuracy of the filter mesh core, in some occasions with high requirements for slurry cleanliness, the existing treatment methods have not been satisfactory, often causing blockage or pollution of the equipment behind the filter. According to incomplete statistics, most of these fine impurities that cannot be completely filtered out are iron-containing impurities. Therefore, we consider adding a magnetic iron removal function to the filter, so that the automatic slurry filter can not only filter out conventional dirty impurities, but also filter out finer iron-containing impurities. Since the magnetic iron removal function is added, it is required that there must be enough space inside the filter to arrange enough magnetic adsorption units. Therefore, the realization of the filtration and backwashing functions of the filter will be different from the existing technical features, ensuring the organic combination of the two functions, with a simple and reliable implementation method and smooth operation without mutual conflict. Summary of the Invention

[0003] The present invention relates to an automatic backwashing slurry magnetic filter, which thoroughly removes conventional dirt and ferromagnetic impurities in liquids and slurries, meeting the requirements of industries such as ceramics, electricity, heat, mining, plastics, chemical engineering, rubber, pharmaceuticals, food, environmental protection, pigments, dyes, electronics, metallurgy, and heat for higher slurry cleanliness.

[0004] An automatic backwashing slurry magnetic filter of the present invention at least includes: an upper housing of the slurry magnetic filter, a lower housing, a flange cover separating the upper housing and the lower housing, an inlet connecting pipe, an outlet connecting pipe, a filter mesh core, a driving assembly of the filter mesh core, a magnetic iron removal and adsorption unit, a hydraulic lifting assembly of the magnetic iron removal and adsorption unit, a hydraulic cylinder of the magnetic iron removal and adsorption unit, a protective sleeve of the magnetic iron removal and adsorption unit, and a sewage discharge pipe. The characteristics are as follows: The slurry to be filtered enters the interior of the filter through the inlet connecting pipe on the lower housing. The impurities in the slurry are filtered out by the filter mesh and adhere to the inner wall of the filter mesh core. The iron-containing impurities are adsorbed on the protective sleeve of the magnetic iron removal and adsorption unit by the magnetic iron removal and adsorption unit. The filtered clean slurry flows out through the outlet connecting pipe on the lower housing. When the impurities on the filter mesh core and the protective sleeve of the magnetic iron removal and adsorption unit reach a certain quantity or the filtration time reaches a cycle, the filter mesh core is rotated clockwise by a distance equal to the spacing from the outlet position to the inlet position in the clockwise direction. At this time, the slurry flowing into the filter mesh will rush to the back of the filter element, forming a reverse flushing of the filter mesh core. The sewage discharge door is opened, and a pressure difference will be formed between the sewage discharge door and the inlet pipe of the filter mesh. At the same time, the hydraulic lifting assembly of the magnetic iron removal and adsorption unit is operated to extract the magnetic iron removal and adsorption unit from the protective sleeve of the magnetic iron removal and adsorption unit. The protective sleeve of the magnetic iron removal and adsorption unit loses the magnetic force, and the iron-containing impurities adsorbed on it will automatically fall off and be discharged together with the negative pressure fluid formed by the sewage discharge port. This process is the cleaning process of the magnetic filter. After the cleaning is completed, the filter mesh core is reset, the hydraulic lifting assembly of the magnetic iron removal and adsorption unit is reset, and the magnetic iron removal and adsorption unit is reinserted into the protective sleeve of the magnetic iron removal and adsorption unit for filtration work, waiting for the next cleaning process to come, and repeating the above actions to complete the next cleaning. Description of the Drawings

[0005] The following further describes an automatic backwashing slurry magnetic filter in conjunction with the drawings and embodiments.

[0006] Figure 1 It is the structural diagram of the present invention.

[0007] Upper housing 1, hydraulic lifting assembly of magnetic iron removal and adsorption unit 2, magnetic iron removal and adsorption unit 3, hydraulic cylinder of iron removal and adsorption unit 4, flange cover 5, filter mesh core 6, lower housing 7, protective sleeve of magnetic iron removal and adsorption unit 8, driving mechanism of filter mesh core 9, transmission guiding device 10, core positioning sleeve 11, core pin wheel 12, lower spoiler 13, sewage discharge pipe 14, support 15, inlet connecting pipe 16, outlet connecting pipe 17, main shaft of filter mesh core 18, spoiler for preventing impurity backflow 19, transmission gear 20.

[0008] Figure 2 It is the sectional structural diagram of the lower housing

[0009] Figure 3 It is the sectional structural diagram of the filter mesh core

[0010] Figure 4 It is an enlarged view of pin - gear drive Specific implementation mode

[0011] As Figures 1 to 4 shown, the slurry magnetic filter of the present invention is divided into an upper housing 1 and a lower housing 7, separated by a flange cover 5. A hydraulic lifting assembly 2 for the magnetic iron - removing adsorption unit is arranged in the upper housing 1. The magnetic iron - removing adsorption unit 3 is fixed head - down on the hydraulic lifting assembly 2 for the magnetic iron - removing adsorption unit. The center of the hydraulic lifting assembly 2 for the magnetic iron - removing adsorption unit is connected to the hydraulic cylinder 4 for the iron - removing adsorption unit. Transmission and guiding devices 10 are arranged at the four corners of the hydraulic lifting assembly 2 for the magnetic iron - removing adsorption unit. Each magnetic iron - removing adsorption unit 3 is correspondingly inserted into a protective sleeve 8 for the magnetic iron - removing adsorption unit. A filter screen core 6 is arranged in the lower housing 7. A core pin - gear 12 is arranged at the lower part of the filter screen core 6. Transmission and guiding devices 10 are arranged at the upper part of the filter screen core 6. A core positioning sleeve 11 is arranged at the center of the bottom of the lower housing 7. The main shaft 18 of the filter screen core is installed in the core positioning sleeve 11. A driving mechanism 9 for the filter screen core is configured outside the lower housing 7. The transmission gear 20 connected thereto meshes with the core pin - gear 12. A protective sleeve 8 for the magnetic iron - removing adsorption unit is arranged in a cantilever - like manner downward on the flange cover 5 at the top of the lower housing 7. The hydraulic cylinder 4 for the iron - removing adsorption unit is arranged downward at the center. A sewage discharge pipe 14 is arranged at the bottom of the housing of the lower housing 7. An inlet connecting pipe 16 and an outlet connecting pipe 17 are arranged on the lower housing 7. The filter screen core 6 is provided with a slurry inlet corresponding to the inlet connecting pipe 16 and a flow - disturbing plate 19 for preventing the backflow of impurities.

Claims

1. An automatic backwashing slurry magnetic filter, at least comprising an upper housing (1), a lower housing (7), a flange cover (5) separating the upper housing (1) and the lower housing (7), an inlet connecting pipe (16), an outlet connecting pipe (17), a filter mesh core (6), a filter mesh core driving mechanism (9), a magnetic iron removal adsorption unit (3), a magnetic iron removal adsorption unit hydraulic lifting assembly (2), a magnetic iron removal adsorption unit hydraulic cylinder (4), a magnetic iron removal adsorption unit protective sleeve (8), and a sewage discharge pipe (14); a filter mesh core (6) is arranged in the lower housing (7), a core pin wheel (12) is arranged at the lower part of the filter mesh core (6), a transmission guiding device (10) is arranged at the upper part of the filter mesh core (6), a core positioning sleeve (11) is arranged at the center of the bottom of the lower housing (7), a filter mesh core main shaft (18) is installed in the core positioning sleeve (11), a filter mesh core driving mechanism (9) is configured outside the lower housing (7), and a transmission gear (20) connected thereto meshes with the core pin wheel (12). A magnetic iron removal adsorption unit protective sleeve (8) is arranged in a cantilevered manner downward on the flange cover (5) at the top of the lower housing (7), a magnetic iron removal adsorption unit hydraulic cylinder (4) is arranged in a cantilevered manner downward at the center of the flange cover (5) at the top of the lower housing (7), and a sewage discharge pipe (14) is arranged at the bottom of the housing of the lower housing (7).

2. The automatic backwashing slurry magnetic filter according to claim 1, characterized in that In the upper housing (1) of the slurry magnetic filter, a hydraulic lifting assembly (2) for the magnetic iron removal and adsorption unit is arranged. The magnetic iron removal and adsorption unit (3) is arranged with its head downwards on the hydraulic lifting assembly (2) for the magnetic iron removal and adsorption unit. The center of the hydraulic lifting assembly (2) for the magnetic iron removal and adsorption unit is connected to the hydraulic cylinder (4) for the iron removal and adsorption unit. Transmission and guiding devices (10) are arranged at the four corners of the hydraulic lifting assembly (2) for the magnetic iron removal and adsorption unit. Each magnetic iron removal and adsorption unit (3) is correspondingly inserted into a protective sleeve (8) for the magnetic iron removal and adsorption unit.

3. The automatic backwashing slurry magnetic filter according to claim 1 or 2, characterized in that a slurry inlet corresponding to the inlet connecting pipe (16) is provided at the position of the filter mesh core (6), and there is a spoiler (19) for preventing impurities from flowing back.

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