JPH064887Y2 - Filter seal band - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a filter seal band, and more particularly to an improvement of a seal band on the filtrate discharge side of a rotary drum in a drum type filter.

[Prior Art] A drum type filter, as is known in a valveless filter or the like, has a hollow drum having a wire mesh attached to the outer peripheral surface thereof, and the filter is attached to the inside of the vat.
While supplying the raw material to be processed into the vat, the drum is rotated so that the water content of the raw material is conducted to the inside of the drum by allowing the wire mesh surface of the drum to conduct, while the solid content in the raw material is blocked on the surface of the wire mesh. The filtration can be achieved.

FIG. 3 and FIG. 4 show a seal band mounting state in a drum type filter. That is, the rotating drum 32 is attached inside the butt 31 of the filter, and the rotating drum 32 has a wire mesh stretched on the outer surface thereof.

A slight clearance d is formed between the butt 31 and the rotary drum 32 in the axial direction, and a seal pad 33 is attached to the outer periphery of the clearance d to form the clearance d.
The water inside the rotary drum 32 is passed through the clearance d and discharged from the drainage port 34 attached to the vat 31 to achieve dehydration or concentration of the raw material to be treated. .

The following three types of seal bands have been mainly used conventionally.

(1) 4 sheets of steel plate (2) 2 mm thick felt wrapped around the 4 layers of steel plate (3) 15 mm felt.

[Problems to be Solved by the Invention] Among the conventional seal bands, (1) the four-layer steel plate has a stretch of the seal band when a raw material of about 40 ° C. is processed, and the seal band may be displaced. In many cases, the raw material is cut into the raw material and leaks.

Therefore, in the conventional seal band, as shown in FIGS. 3 and 4, bolts 35 having seal band fixing fittings 37 are attached to both ends of the seal band 33, and the bolts 35 are attached to the upper part of the butt 31. Although the so-called retightening is performed by screwing on the seal band tension metal fitting 36 and tightening with the bolt 35, the retightening frequency is high,
When the limit is reached the seal band must be cut down.

Further, since the sealing is insufficient, the raw material is more likely to bite into the sealing surface, and the work such as washing away the raw material adhering to the seal band and then re-tacking is complicated.

Further, although the conventional seal band (2) can improve the adhesiveness as compared with (1), elongation occurs when the raw material is treated at about 40 ° C,
The frequency of tightening will increase. Further, the production of the seal band of (2) requires skill.

Furthermore, the conventional seal band (3) has very good adhesion on the sealing surface, but has a high temperature and a large amount of treatment,
When the rotating drum rotates faster, it extends significantly, and in extreme cases, it may break.

[Means for Solving the Problems] The present invention is a filter seal band in which felt is laminated and bonded via an adhesive to one surface of a plate made of stainless steel folded and overlapped with the width of the seal band. is there.

Here, the stainless steel plate is not particularly limited, and various types can be used. Instead of the plate, a steel wire mesh, for example, a wire mesh used on a rotating drum (for example, a mesh of 50 mesh) can be used.

The width of the seal band (about 8
0mm) and fold it in half or three. In this case, it is preferable to make three or more folds.

Felt is adhesively laminated on one surface of the stainless steel plate bent as described above. In order to bond and laminate the both, they may be bonded with various known adhesives, in which case they may be placed on a flat floor surface and pressure-bonded by applying pressure from the top.

The felt is preferably relatively thick, for example, 15 mm thick, but is not limited to this. The width of the felt may be the same width as the bent width of the stainless steel plate, but is preferably slightly smaller than the width of the bent one (for example, about 65 mm).
That is, when the present invention is attached, the felt may stick out from the end surface of the stainless steel plate due to the tightening of the seal band, the raw material may bite into that part, or may be drawn toward the rotating shaft side that is rotating, and the seal band may be displaced. Because there is.

In the present invention, a 15 mm thick felt portion is brought into close contact with the sealing surface, a bolt having a seal band fixing metal fitting is attached as in the conventional case, and the bolt is screwed to a seal band attaching metal fitting attached to the upper part of the butt and tightened. Good.

[Operation] In the present invention, since the felt can be strongly pressure-bonded to the sealing surface with the stainless steel plate, there is no fear that the felt will come off from the sealing surface, and there is almost no liquid leakage.

Further, since the seal band is reinforced with the stainless steel plate, the extension is small, and therefore the frequency of retightening can be greatly reduced.

In addition, it is easy to carry and install because it is hardly affected by rolling the seal band or twisting.

[Embodiment] FIG. 1 and FIG. 2 show an embodiment of the present invention, and the present invention will be described below with reference to the drawings.

The seal band 1 of the present invention is made by adhering a felt 3 having a thickness of 15 mm through an adhesive 4 to one surface of a stainless steel wire net (hereinafter abbreviated as a wire net) 2 that is folded in three.

The wire mesh 2 used here is one that has been used in the rotary drum (mesh 50 mesh), but is not limited to this and may be a wire mesh having a different mesh, or may be a stainless steel plate. .

In the seal band 1 of the present invention, bolts 35 having seal band fixing metal fittings 37 as shown in FIG. 3 are attached to both ends similarly to the conventional seal band, and the bolts 35 are screwed into the seal band tensioning metal fittings 36 on the butt 31. Wear it and attach it.

The seal band of the present invention has a relatively small extension, so that liquid leakage from the sealing surface can be improved. That is, the loss of pulp caused by liquid leakage from the sealing surface was reduced to about 0.01% in the present invention, while the pulp concentration in the filtrate was about 0.05%. It is reused in the system, but part of it is discharged. Therefore, the loss loss of pulp was about 1/5.

Further, since the seal band of the present invention is hardly affected by rolling or some twisting, it is easy to carry or install, and the time required for replacement can be almost halved. Further, since the structure is simple, it can be easily manufactured by workers on site.

[Advantages of the Invention] As described above, the present invention has a simple structure, can be easily attached in place of the conventional seal band, and the seal band does not extend much and has good adhesion to the seal surface. There is little liquid leakage.

Further, since the extension is small, the inspection frequency may be a regular inspection of twice / month, and the handling is easy, so that the efficiency of replacement work can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a side view,
FIG. 3 is an explanatory view showing a seal band attached state, FIG.
The drawing is a view taken along the line IV-IV in FIG. 1: Seal band, 2: Wire mesh, 3: Felt, 4: Adhesive layer, 31: Vat, 36: Seal band fitting, 3
7: Seal band fixing bracket.

Claims (1)

[Scope of utility model registration request] 1. A seal band for a filter, wherein felt is laminated and adhered to one surface of a sheet made by folding a plate made of stainless steel to the width of the seal band and overlapping them with an adhesive.