JPS6236494Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a liquid filter containing a spiral-wound element.

This type of liquid filter is made by layering a flat plate material and a corrugated material into an inner cylinder, and then sealing alternately both ends of the flow path formed between them.A spiral element is formed between the casing and the lid plate. The structure of a conventional filter and the flow of liquid will be explained using a liquid filter 10a shown in FIG. 2a.

The liquid flowing in through the plurality of through holes 14 formed in the cover plate 12 is directed to the upper part of the spiral element 5 (in the figure).
The flow flows from the upper opening 8 formed between the closing parts 7 and 7 toward the lower (in the figure) closing part 7', but as shown by the arrow, it passes through the overwall 6 and flows through the lower opening 8. ′
It passes through the interior of the inner cylinder 9 and flows out from the threaded portion 13 of the upright portion 12' provided on the cover plate 12.

The liquid flows in the spiral element 5 as described above, but when the spiral element 5 is inserted into the casing 1a, the liquid does not pass through the gap between its outer periphery and the inner surface of the cylindrical portion 2a of the casing 1a. Therefore, in order to prevent this, conventionally, the
It was like that. That is, in FIG. 2a, a sealant 18a is applied to the outer periphery of the spiral element 5 or the inner surface of the inner cylindrical portion 2a of the casing 1a to seal the cylindrical portion 2.
A spiral element 5 is inserted into the space a to seal the gap. FIG. 2b shows a reservoir 19 located below the top of the spiral element 5 when the spiral element 5 is inserted into the casing 1b.
After inserting the spiral element 5 into the casing 1b, a sealant 18b is injected into the reservoir 19.

However, since the spiral element 5 is usually made by winding, strong tension is not applied at that time, and therefore it is difficult to form a perfectly circular cylindrical element, and the gap between the outer periphery of the spiral element 5 and the inner surfaces of the cylindrical parts 2a and 2b is small. There was a problem in that the sealing agents 18a and 18b of the liquid filters 10a and 10b shown in FIGS. 2a and 2b were not constant, and pinhole-like gaps were formed and the sealing agents could not be completely sealed.

The present invention was devised to eliminate this problem, and embodiments will be described below with reference to the drawings.

FIG. 1 shows a liquid filter 10 of the present invention, in which a spiral element 15 having a wound layer 17 is disposed within a housing formed by a cylindrical casing 1 and a lid plate 12.

The spiral element 5 is formed by layering a flat plate material and a corrugated material on the inner cylinder 9 formed in the bent portion 9', and alternately sealing both ends of the flow path formed between them, and closing the closed portion 7. , 7' and openings 8, 8', and the outer periphery of the spiral element 5 on the side opposite to the bent part 9' of the inner cylinder 9 is covered with a flexible material such as non-woven fabric or yarn. An annular band-shaped winding layer portion 17 made of a material is provided. The winding layer part 17
The spiral element 5 provided with is press-fitted into the cylindrical part 2 from the wound layer part 17 side to the open end 3 side of the casing 1 until its lower end abuts on the stepped part 4. In this state, the wound layer made of a flexible material is compressed, and the inner and outer peripheries of the wound layer 17 are in close contact with the outer peripheral surface of the element and the inner peripheral surface of the casing, regardless of the outer dimensions and shape of the over-element. A sealant 18 is filled into the annular gap formed by the wound layer part 17, the inner surface of the cylindrical part 2 of the casing 1, and the outer periphery of the spiral element 5, and is hardened by, for example, heating and drying. An annular packing 11 is placed on the bent part 9' of the inner cylinder 9, and has a threaded part 13 screwed inside the upright part 12', a plurality of through holes 14, and a surrounding plate on the outer periphery of the upper part. 15 is fixed to the inner cylinder 9 from the open end 3 side as an outer guide of the upright part 12', and abuts against the gasket 11. This is achieved by caulking the parts and providing a caulking part 16.

As described above, the present invention press-fits a spiral element having a wound layer made of a flexible material on the outer periphery into a casing, and ensures close contact between the outer circumferential surface of the element, the inner circumferential surface of the casing, and the inner and outer circumferential surfaces of the wound layer. Since the structure is such that the sealant is filled between the inner surface of the casing and the outer peripheral surface of the element, no voids are formed due to non-uniformity in the outer diameter or shape of the spiral element. It accumulates between the winding layer, the inner surface of the casing, and the inner circumferential surface of the element without flowing down below the winding layer, forming a complete seal and preventing liquid from leaking from any part other than the element, resulting in excellent quality. It becomes something. Furthermore, since the sealant is sufficiently filled, the vibration resistance strength can also be improved.

In addition, the flow of liquid in a liquid filter with a spiral element is the opposite of the above explanation, that is, the liquid flows in from the threaded part of the lid plate, passes through the inner cylinder, passes through the spiral element, and flows out from the hole in the lid plate. It also applies when

[Brief explanation of the drawing]

Figure 1 is a sectional view of the liquid filter of the present invention, Figure 2 is a cross-sectional view of the liquid filter of the present invention;
Figures a and b are partial sectional views of a conventional liquid filter. 1... Casing, 5... Spiral element,
10...liquid filter, 12...lid body, 16...
Caulking part, 17... Winding layer part, 18... Sealing agent.

Claims (1)

[Scope of utility model registration request] A spiral element formed by layering a flat plate material and a corrugated material and alternately sealing both ends of the flow path formed between the two materials is combined with a cup-shaped casing and a lid body having an inlet and an outlet. A liquid filter housed in a housing consisting of a ring-shaped winding layer made of a flexible material is provided on the outer periphery of the element, and an end surface of the winding layer, an inner surface of the cylindrical portion of the casing, and an outer circumferential surface of the element are provided. 1. A liquid filter having a spiral element, characterized in that a sealing agent is filled in a gap formed by a liquid filter.