JP3291725B2 - Basket for filtration in centrifugal dehydrator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a filtration basket in a centrifugal dewatering machine used for dewatering sludge or the like.

[0002]

2. Description of the Related Art A conventional centrifugal dehydrator supplies a stock solution such as sludge to a basket in which a filter material such as a metal mesh is stretched around the periphery, rotates the material at a high speed, and performs solid-liquid separation. The stacked cake is taken out by a screw blade concentrically supported in a basket. Since the basket rotates at a high speed, the basket is provided with high strength and is precisely machined for balancing.

[0003]

For this reason, conventionally, in order to manufacture a basket, a great deal of work is required for precision processing, and a strength that can withstand a high load is required, and the skeleton body is constructed to be strong. On the other hand, a wide screen window is required from the screen surface for dehydration, and a great deal of trouble is required to construct the skeleton.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. The gist of the present invention is to provide an outer peripheral surface of a thick-walled cylinder along a generatrix direction. A plurality of grooves arranged at equal intervals in the circumferential direction, and a plurality of ring-shaped grooves whose depth reaches the bottom surface of the grooves in the generatrix direction are provided on the inner surface of the cylindrical body .
A screen made of a metal mesh or the like is provided on the inner peripheral surface.

[0005]

SUMMARY OF filtration basket according to the invention is constructed as described above, to fabricate this, the outer peripheral surface of the cylindrical body, not rust steel by Li Cheng thick, while along its generatrix direction Several grooves are provided at equal intervals in the circumferential direction, and then, on the inner surface of the cylindrical body, a ring-shaped groove whose depth reaches the bottom surface of the groove is provided.

By doing so, a window can be formed at the intersection of the generatrix groove and the ring-shaped groove in the periphery of the cylindrical body, and then the metal is formed on the inner surface or outer surface of the cylindrical body. By stretching filter media such as mesh,
A cylindrical screen having a filter medium stretched over the window can be formed.

[0007] The cylindrical screen thus constructed is solid because its skeleton is of an integral structure, and is particularly formed by machining, so that it can be formed at a high density and rotates at a high speed. It is most suitable for use. The opening area of the filtering window formed in the peripheral portion of the skeleton can be adjusted by adjusting the number and width of the vertical and horizontal grooves. Hereinafter, the present invention will be specifically described with reference to the drawings.

[0008]

FIG. 1 is a schematic longitudinal sectional side view of a centrifugal dehydrator equipped with a filtering basket according to the present invention. The filtering basket according to the present invention corresponds to reference numeral 1 in the drawing. This filtration basket 1 is used in an apparatus as shown in FIG. 1 and is driven to rotate at high speed to separate sludge and the like supplied therein into solid and liquid, and the filtrate is caked (concentrated) in a tray 2 in a casing. Liquid) is taken out of the machine.

[0009] FIGS. 2 and 3, an illustration taken out a portion of the basket for illustrating the configuration of the filtering basket according to the present invention. In the figure, reference numeral 3 is not rust steel
Cylinder, 3a configured in is a groove provided along the generatrix on the outer peripheral surface of the cylindrical body 3, the groove 3a is arranged at equal intervals in the circumferential direction of the cylindrical body 3 as shown in FIG. 3 It is provided.

Next, in the figure, reference numeral 3b denotes a number of ring-shaped grooves provided on the inner surface of the cylindrical body 3, and the depth thereof is set to reach the bottom surface of the aforementioned groove 3a. That is, a screen window 3c is formed on the peripheral surface of the cylindrical body 3 where the ring-shaped groove 3b and the above-mentioned groove 3a intersect. Also,
A screen 4 is stretched on the inner surface of the cylindrical body 3 to form a screen basket.

As apparent from the above description, the basket according to the present invention has a cylindrical body 3 made of stainless steel or the like.
The vertical and horizontal members for supporting the screen 4 are formed in an integral structure, so that the members are formed in an integrated structure. Since it is strong and mechanically processed, it can be configured precisely, and can be used in a high-speed rotating centrifugal dehydrator without the risk of vibration or the like, thereby constituting an optimal basket.

In the above embodiment, the generatrix groove 3a provided in the cylindrical body 3 is provided on the outer peripheral surface of the cylindrical body 3, and the ring-shaped groove 3b is provided on the inner surface of the cylindrical body 3. The groove 3a in the generatrix direction may be provided on the inner surface of the cylindrical body 3, and the ring-shaped groove 3b may be provided on the outer peripheral surface of the cylindrical body 3. Even in this case, a strong and highly accurate basket can be constructed in the same manner as described above, but when the groove 3a in the generatrix direction is provided on the inner surface, when the basket is rotated at a high speed, The added advantage is that the edge of the groove 3a provided (indicated by reference numeral 3d in FIG. 3) prevents noise that cuts off the wind.

[0013]

As described above, according to the present invention, a strong and highly accurate basket can be easily obtained. In particular, the present invention is applied to a centrifugal dehydrator which rotates at high speed and requires high accuracy. It works.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional side view of a centrifugal dehydrator using a basket according to the present invention.

FIG. 2 is a vertical sectional side view of the basket according to the present invention.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

[Explanation of symbols]

 3 cylindrical body 3a groove 3b ring-shaped groove 4 screen

Claims (1)

(57) [Claims] 1. A periphery of the cylindrical body 3 of the thick constituted by non rust steel
A plurality of grooves 3a arranged at regular intervals in the circumferential direction along the generatrix direction on the surface portion ;
a plurality of ring-shaped grooves 3b reaching the bottom surface of the cylindrical body
Provided with a third inner surface, the inner peripheral surface of the cylindrical body 3, filtered basket of the centrifugal dehydrator comprising stretched the Metarumesshi Interview by Li Cheng screen 4.