CN203678044U - Rough filtering back-flushing mechanism for plate and frame filter - Google Patents

Abstract

The utility model discloses a rough filtering back-flushing mechanism for a plate and frame filter. The rough filtering back-flushing mechanism is characterized by comprising a bypass pipe and a bypass switching valve arranged on the bypass pipe, wherein one end of the bypass pipe is connected to an oil inlet pipe, and the other end of the bypass pipe is connected with the upper end of a back-flushing channel positioned on a clapboard; an outlet in the lower end of the back-flushing channel is formed in one side face, in which a rough filtering cavity is positioned, of the clapboard. The back-flushing mechanism further comprises a back-flushing pipe communicated downwards to the bottom of the rough filtering cavity positioned on one side facing an oil inlet pipe of a rough filtering plate, and a back-flushing switching valve is arranged on the back-flushing pipe. The rough filtering back-flushing mechanism further comprises an oil inlet switching valve positioned on the upper part of the bypass pipe, on the oil inlet pipe. The rough filtering back-flushing mechanism has the advantages of simple structure and convenience in cleaning of impurity particles filtered out in the rough filtering cavity.

Description

One plate filter coarse filtration backwash mechanism

Technical field

The utility model relates to a kind of plate filter, especially a kind of plate filter coarse filtration backwash mechanism.

Background technology

Plate filter, is again plate oil-filter, or plate and frame type filter-press; Be a kind of design such as each power plant, power station, industrial and mining enterprises, lubricating oil storehouse, tractor station, oil, chemical industry, metallurgy, national defence unit that aims at, be mainly used to filter trace water in transformer oil, turbine oil, machine oil, diesel oil, hydraulic air wet goods oil and the filter plant of impurity.

The structure of plate filter is generally by filter bed, and the elements such as oil pump and coarse filter form.Wherein, filter bed comprises that one is filtered housing and is set up in parallel the many groups filtering bodies in filter housing fluid chamber, filtering bodies comprises filter, the filter frame of coupling, between filter plate and filter frame, be lined with filter paper or filter cloth as filter medium, rely on again the pressure of hold down gag by filter plate and an independent filter chamber of the fixing formation of filter frame, be pressed in filter paper or filter cloth filtration between filter plate and filter frame.For example China's utility model application number 201220148851.7 disclosed a kind of pressure type plate oil-filters are above-mentioned this version.There is the advantages such as features simple structure, processing ease, operating cost be low.

But the transformer oil that the places such as some power plant, coal-fired plant and industrial and mining enterprises are used; in oil, usually can contain a large amount of impurity; while causing filter to use, oil-in place first can be filled up by impurity very soon to the filtration cavity on filter plate, and then has affected filter efficiency and effect.

In order to address the above problem, applicant considers to design a kind of plate filter, in filter housing intracoelomic cavity, arranges and is separated out a coarse filtration chamber with dividing plate, considers that coarse filtration mechanism is set tentatively filters oil residue in coarse filtration chamber.Like this, how how to make the impurity particle filtering out in coarse filtration chamber be beneficial to cleaning, become the problem that needs to be considered solution.

Utility model content

For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is, how to provide a kind of simple in structure, the plate filter coarse filtration backwash mechanism of the impurity particle filtering out in can easy cleaning coarse filtration chamber.

In order to solve the problems of the technologies described above, in the utility model, adopt following technical scheme:

One plate filter coarse filtration backwash mechanism, it is characterized in that, described coarse filtration backwash mechanism, comprise bypass pipe and be arranged on the bypass cock valve on bypass pipe, described bypass pipe one end is connected on oil inlet pipe, the other end is connected with the recoil passage upper end being positioned on dividing plate, and the outlet of described recoil passage lower end is positioned at side, place, coarse filtration chamber on dividing plate; Backwash mechanism also comprises that being positioned at coarse filtration plate goes back downwards and be communicated with and be provided with backwash tube in the face of the bottom, coarse filtration chamber of oil inlet pipe one side, on backwash tube, be provided with backwash switch valve, backwash mechanism also comprises the oil-feed switch valve that is positioned at the above bypass pipe top of oil inlet pipe.

Like this when coarse filtration mechanism was used after a period of time, can close oil-feed switch valve, open bypass cock valve and backwash switch valve, like this, fluid is in bypass pipe flow into the coarse filtration chamber between coarse filtration plate and dividing plate, a part continue backward flow, another part carry out backwash by coarse filtration plate filter opening and the dregs of fat impurity of coarse filtration chamber oil-feed side from backwash tube, go out.Can complete quickly and easily like this cleaning to filter residue in coarse filtration chamber.

In sum, the utlity model has simple in structure, the advantage of the impurity particle filtering out in can easy cleaning coarse filtration chamber.

Accompanying drawing explanation

Structural representation when Fig. 1 is a kind of plate-frame filtering implement body enforcement that has adopted the utility model structure.

The specific embodiment

The utility model is described in further detail to have adopted plate filter of the present utility model and accompanying drawing thereof below in conjunction with one.

In this specific embodiment, as shown in Figure 1, one has adopted plate filter of the present utility model, the filtration housing 1 of cuboid frame structure, filter that housing 1 is interior is provided with the many groups of filtering bodies that are interconnected 2 side by side, filtering bodies 2 is made up of the filter mating, filter frame and interior filter cloth thereof; In described filter housing intracoelomic cavity, a coarse filtration chamber and a filtering bodies installation cavity are separated to form by dividing plate 3, one end relative with dividing plate 3, described coarse filtration chamber is provided with oil inlet pipe 4, is provided with the oil hole 5 excessively as the fuel feed hole of first pair of filtering bodies in filter housing intracoelomic cavity on described dividing plate 3; Described coarse filtration is provided with coarse filtration mechanism in chamber, and described coarse filtration mechanism comprises that vertical separation is arranged at the coarse filtration plate 6 between coarse filtration chamber internal partition and oil-feed pipe end.Wherein, described coarse filtration mechanism, also comprise a top board 7, top board 7 is removably mounted on the opening on top, coarse filtration chamber, top board 7 is embedded on opening by the circle elastic seal ring arranging on opening, described coarse filtration plate 6 is fixed on top board 7 bottoms and on it, is evenly distributed with the filter opening that diameter is 0.5mm, and coarse filtration plate 6 both sides and bottom are the arcwall face 8 of evagination and are engaged in the deep-slotted chip breaker of coarse filtration chamber sidewall and bottom.Wherein, also comprise coarse filtration backwash mechanism, described coarse filtration backwash mechanism, comprise bypass pipe 9 and be arranged on the bypass cock valve 10 on bypass pipe 9, described bypass pipe 9 one end are connected on oil inlet pipe 4, the other end is connected with recoil passage 11 upper ends that are positioned on dividing plate 3, and described recoil passage 11 lower end outlets are positioned at side, place, coarse filtration chamber on dividing plate 3; Backwash mechanism also comprises that being positioned at coarse filtration plate goes back downwards and be communicated with and be provided with backwash tube 12 in the face of the bottom, coarse filtration chamber of oil inlet pipe one side, on backwash tube 12, be provided with backwash switch valve 13, backwash mechanism also comprises the oil-feed switch valve 14 that is positioned at oil inlet pipe 4 the above bypass pipe top.Wherein, coarse filtration plate, in the face of the coarse filtration chamber lower surface of oil inlet pipe one side is that shape and backwash tube 12 upper ends recessed to centre are positioned at lower recess center position, is beneficial to anti-cleaning deslagging so more.Wherein, top board 7 upper surfaces are also provided with handle and extract dismounting to facilitate.

In above-mentioned filter, in filter housing intracoelomic cavity, go out a coarse filtration chamber by baffle for separating, when this spline filter, impurity thicker in transformer oil can be filtered in coarse filtration chamber, avoid being accumulated to filtering bodies installation cavity first in the filtration cavity on filter plate and affect filter efficiency, improved filter efficiency and filtering accuracy.The coarse filtration mechanism wherein arranging, has coarse filtration plate quick and easy for installation, and the advantage of rear enclosed good filtration effect is installed.Wherein be provided with backwash mechanism, when filter used after a period of time, can close oil-feed switch valve, open bypass cock valve and backwash switch valve, like this, fluid in bypass pipe flow into the coarse filtration chamber between coarse filtration plate and dividing plate, a part continue backward flow, another part carry out backwash by coarse filtration plate filter opening and the dregs of fat impurity of coarse filtration chamber oil-feed side from backwash tube, go out.Can complete quickly and easily like this cleaning to filter residue in coarse filtration chamber.

In sum, above-mentioned filter can be realized cascade filtration, has guaranteed filtering accuracy and filter efficiency, is particularly suitable for the transformer oil filtration use that the places such as power plant, coal-fired plant and industrial and mining enterprises are used.

Claims (1)

1. a plate filter coarse filtration backwash mechanism, it is characterized in that, described coarse filtration backwash mechanism, comprise bypass pipe and be arranged on the bypass cock valve on bypass pipe, described bypass pipe one end is connected on oil inlet pipe, the other end is connected with the recoil passage upper end being positioned on dividing plate, and the outlet of described recoil passage lower end is positioned at side, place, coarse filtration chamber on dividing plate; Backwash mechanism also comprises that being positioned at coarse filtration plate goes back downwards and be communicated with and be provided with backwash tube in the face of the bottom, coarse filtration chamber of oil inlet pipe one side, on backwash tube, be provided with backwash switch valve, backwash mechanism also comprises the oil-feed switch valve that is positioned at the above bypass pipe top of oil inlet pipe.

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