CN202876462U - Sand washer of active sand filter - Google Patents

Abstract

The utility model discloses a sand washer of an active sand filter. The sand washer is composed of an inner shell and an outer shell nested with each other inside and outside, wherein both the inner shell and the outer shell adopt a semi-cylindrical molded part, and joint screw holes are formed in petal sides; triangular sections and straight-wall sections are formed alternatively at intervals on the circumference; after the inner shell is nested with the outer shell, the triangular sections of the inner shell are just opposite to the straight-wall sections of the outer shell, and the straight-wall sections of the inner shell are opposite to the triangular sections of the outer shell, so that a waved zigzag sand washing channel is formed. By adopting the inner and outer shells of the molded sand washer, the sand washer of the active sand filter has the characteristics that the wall thickness is rather large, abrasion and fracture are prevented, the reliability of the device is effectively increased, and long-term stable running is realized. The straight-wall sections and the triangular sections are arranged alternatively at intervals to form the waved zigzag sand washing channel, so that the sand washing quality is improved. And after the outer shell is combined with the inner shell, the triangular sections and the straight-wall sections are opposite to each other, so that dead corners are not existing in a sand flowing channel, sand particles can pass successfully, and the sand washing quality is guaranteed.

Description

The sand-washing device of active sand filter

Technical field

The utility model relates to the environmental protection equipment field, especially a kind of sand-washing device of active sand filter.

Background technology

The Continuous Flow sand filter is a kind of newer sewage purification treatment equipment, is used for the filter sand of sewage disposal by the continuous flushing of built-in sand-washing device, does not need backwash to shut down and can move continuously, and the automation of equipment, serialization degree are very high; And the washed-out sand effect of sand-washing device directly has influence on the height of whole equipment effluent characteristics.In the prior art, in order to reduce cost, can directly adopt some bellowss to make sand-washing device, the tube wall of bellows is thinner, and be lower washing away for a long time of sand grains, and the wearing and tearing cracking occurs easily; And have the dead angle in the bellows, and sand grains can stop up, and cross section of fluid channel reduces the rear flow that directly affects washed-out sand.

The utility model content

The applicant adopts bellows to make for above-mentioned existing sand-washing device, and the easy shortcoming such as Wear and plug provides a kind of sand-washing device of active sand filter rational in infrastructure, thereby can finish efficiently the washed-out sand operation.

The technical scheme that the utility model adopts is as follows:

A kind of sand-washing device of active sand filter, by nested composition the inside and outside inner casing and the shell, inner casing and shell are the molded parts of semi-cylindrical, close face at lobe and are provided with connecting screw hole; The type that alternately is partitioned on periphery has triangle Duan Yuzhi wall section, behind inlaid-assembling inside and outside inner casing and the shell, the triangle section of inner casing is just in time corresponding with the straight wall section of shell, and the straight wall section of inner casing is corresponding with the triangle section of shell, thereby has formed the washed-out sand passage of wave complications.

As further improvement in the technical proposal: the wall thickness of described inner casing and shell is about 5～7mm.

The beneficial effects of the utility model are as follows:

The utility model adopts the inside and outside shell of molded sand-washing device, and has thicker wall thickness, prevents wearing and tearing and breaks, and has effectively improved the reliability of equipment, realizes operation steady in a long-term.The utility model arranges straight wall section and triangle section by alternate intervals, has formed the washed-out sand passage of wave complications, has improved the quality of washed-out sand.The triangle Duan Yuzhi wall section of inside and outside shell is corresponding after the combination, does not have the dead angle in the quicksand passage thereby make, and sand grains can pass through smoothly, has guaranteed the flow of washed-out sand.

Description of drawings

Fig. 1 is front view of the present utility model.

Among the figure: 1, inner casing; 2, shell; 3, connecting screw hole; 4, washed-out sand passage; 5, triangle section; 6, straight wall section.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described.

As shown in Figure 1, the sand-washing device of active sand filter described in the utility model is by 2 inside and outside nested compositions of inner casing 1 and shell, and between forms washed-out sand passage 4.Inner casing 1 and shell 2 are the molded parts of semi-cylindrical, close face at lobe and are provided with connecting screw hole 3, utilize securing member two semi-circular features that link closely; The type that alternately is partitioned on periphery has triangle section 5 and straight wall section 6, behind inner casing 1 and shell 2 inside and outside inlaid-assemblings, the triangle section 5 of inner casing 1 is just in time corresponding with the straight wall section 6 of shell 2, in like manner, the straight wall section 6 of inner casing 1 is also just in time corresponding with the triangle section 5 of shell 2, thereby has formed the washed-out sand passage 4 of wave complications.Inner casing 1 adopts the nylon manufacturing with shell 2, and wall thickness is about 5～7mm.

During real work, sand grains falls to the washed-out sand passage 4 of sand-washing device from top, and is interior to lower sedimentation at the washed-out sand passage 4 of complications, constantly by triangle section 5 stops and bump of inner casing 1 with shell 2, sand grains separated fully with dirt; Be subject to simultaneously reverse water purification flushing, dirt is upwards taken away, the heavier sand grains of weight then falls to filter bed.

More than describing is to explanation of the present utility model, is not the restriction to utility model, and the utility model limited range is referring to claim, and in the situation of the utility model spirit, the utility model can be done any type of modification.

Claims (2)

1. the sand-washing device of an active sand filter is characterized in that: by inner casing (1) and shell (2) inside and outside nested composition, inner casing (1) and shell (2) are the molded parts of semi-cylindrical, close face at lobe and are provided with connecting screw hole (3); The type that alternately is partitioned on periphery has triangle section (5) and straight wall section (6), behind the inside and outside inlaid-assembling of inner casing (1) and shell (2), the triangle section (5) of inner casing (1) is just in time corresponding with the straight wall section (6) of shell (2), the straight wall section (6) of inner casing (1) is corresponding with the triangle section (5) of shell (2), thereby has formed the washed-out sand passage (4) of wave complications.

2. according to the sand-washing device of active sand filter claimed in claim 1, it is characterized in that: described inner casing (1) is about 5～7mm with the wall thickness of shell (2).

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