JPH10211410A - Filter apparatus for puls jet type precipitator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a service life of a filter by a method wherein in a filter for a puls jet type precipitator wherein a reinforcing cage is inserted inside, a compressed air-blowing-in Venturi is fitted to an upper end opening, the reinforcing cage is constituted by using a cage pipe made of a synthetic resin and equipped with flexibility. SOLUTION: A filter apparatus 1 of a puls jet type precipitator which shakes down dust stuck to the filter is composed of a filter paper body SF, a reinforcing cage 2, an upper face plate 3A, a bottom face plate 4A, a Venturi 3, and an inside filling body 4. In this case, the cage 2 is formed in an almost cage pipe shape which forms a grid shape in which vertical rodes 2A... and horizontal rods 2B... cross at right angles mutually by using synthetic resin material equipped with flexibility and strength, or a grid shape wherein they intersect obliquely each other. When the filter paper body SF is inflated outward with puls jet air for dedusting blown in through the Venturi 3, force applied to upper and lower both end parts of the filter paper body SF is restrained thereby, and the filter is prevented from being impaired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of a pulse jet type dust collector in which dust adhered to a filter by a dust collecting operation is blown off by blowing compressed air into the filter. Specifically, the present invention relates to a filter device suitable for use in this pulse jet type dust collector.

[0002]

2. Description of the Related Art A conventional filter used in a pulse jet type dust collector is, for example, as disclosed in Japanese Patent Application Laid-Open No. 63-319018 or Japanese Patent Application Laid-Open No. 8-38839, which has a generally pleated cross section. A metal cage is fitted into the inside of a filter paper body (filter) formed in a mold) to reinforce the form of the filter paper body.

FIG. 5 is an exploded perspective view for explaining the configuration of the filter device described in the above-mentioned Japanese Patent Application Laid-Open No. 8-38839. In the drawing, reference numeral SF denotes a filter paper body (filter) formed into a substantially star-shaped cross section; 11A is an upper plate attached to the upper end opening SFA of the filter paper body SF, 11 is a venturi for blowing compressed air integrally formed on the upper plate 11A, and 10 is a metal for reinforcing the form constituted by vertical rods 10a ... and horizontal rods 10b. Reference numeral 12 denotes an internal filler inserted into the filter paper body SF, and reference numeral 14 denotes a bottom plate attached to the lower end opening SFB of the filter paper body SF.

In order to assemble the filter constructed as described above, after assembling the members as shown in the drawing, a T-shaped horizontal rod 13T having a T-shaped horizontal rod 13T in a shaft hole 14a of the bottom plate 14 is provided.
The top plate 11A and the bottom plate 14 are fixed to the upper and lower ends 10T, 10S of the metal cage 10 by inserting the tip 13a of the mold bolt 13 and then fitting and washering the washer 14a and the nut 15. The filter for the pulse jet type dust collector is assembled with the metal cage 10 inserted in the filter paper body SF.

In the filter configured as described above, during normal dust collection operation, dust containing dust is collected on the filter paper body SF and only clean air is discharged by circulating air containing dust from the outside toward the inside. On the other hand, this filter paper body SF
If clogged by dust collected by
By injecting pulse jet air toward the inside of the filter paper body SF through the venturi 11, the filter paper body S
The entirety of F is inflated outward to remove dust attached to the outer peripheral surface.

[0006]

However, as described above, when the filter paper body SF expands outward due to the blowing of pulse jet air, the entire filter paper body SF exerts a force in a direction in which its length contracts (a direction in which it becomes shorter). In contrast, the metal cage 10 formed by using a round bar made of iron or the like does not deform and maintains the previous configuration and the vertical gap between the upper and lower double-sided plates 11A and 14 as a result. There is a problem that a tensile force, a frictional force, or the like is applied around the upper and lower attachment portions of the body SF to damage the portion, thereby shortening the life of the filter.

[0007] Therefore, the technical problem to be solved by the present invention is that even if the outward swelling is repeated due to the blowing of the pulse jet air, no force acts on the upper and lower mounting portions of the filter, and this portion is damaged. To prolong the life of the filter.

[0008]

Means taken by the present invention to solve the above-mentioned technical problems are as follows.

In a filter for a pulse jet type dust collector in which a reinforcing cage is inserted inside and a venturi for blowing compressed air is attached to an upper end opening,

(1) The cage for reinforcement is made of a cage-type pipe made of a synthetic resin and having flexibility in vertical or horizontal or diagonal lattice form. (Claim 1)

(2) The top plate and the bottom plate attached to the upper end and the lower end of the filter are integrally formed using synthetic resin, including the venturi on the upper plate side, and a cage-shaped synthetic resin cage. The top plate and bottom plate should be bonded to the upper and lower ends of the board. (Claim 2)

According to the first aspect of the present invention, when pulse jet air is blown into a filter (filter paper body) through a venturi, the entire filter swells outward and extends in the length direction (up and down). Direction), but the cage made of reinforcing synthetic resin in the shape of a cage pipe inserted inside deforms following the bulge of this filter, so it absorbs the compressive force applied to the filter softly. By preventing damage to the portion, the life of the filter can be prolonged, and the extent of the filter in the outer peripheral direction increases with the deformation of the synthetic resin cage. Allows you to enhance.

According to the means of claim 2 described in the above (2), since all of the top plate and the bottom plate including the venturi and the reinforcing cage are made of synthetic resin, the cage These upper and lower plates can be easily bonded to and integrated with both upper and lower ends of the filter, simplifying the structure and reducing costs.Also, no metal is contained in the filter components including the cage. Since the filter is not used, when the filter is treated as waste material, it is possible to dispose the filter as it is, without any modification or separation.

As described above, the above (1),
By solving the above technical problem by means of (2),
The problem of the conventional technique can be solved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings.
FIG. 1 is a partial cross-sectional front view of a filter device for a pulse jet type dust collector according to the present invention, and FIG. 2 is a partially omitted plan view thereof. The filter device shown includes a filter paper body SF (filter) formed into a cylindrical shape having a substantially star-shaped (pleated) cross section as shown in FIG. 2, and various parts made of synthetic resin to be attached to the filter paper body SF. It is constituted by.

The above-mentioned parts include a reinforcing cage 2 inserted into the inside of the filter paper body SF, a top plate 3A and a bottom plate 4A attached to the upper end port SFA and the lower end port SFB of the filter paper body SF, respectively. , A venturi 3 integrally formed on the top plate 3A, and an internal filler 4 integrally formed on the bottom plate 4A.

Of these parts, the reinforcing cage 2 is made of a synthetic resin material having flexibility and strength such as high-density polyethylene. As described in the above, the entirety is formed in a substantially basket-like pipe shape in which a vertical rod 2A... And a horizontal rod 2B.

FIG. 3 is a perspective view showing a state in which the filter device according to the present invention is assembled. In the assembly, first, the upper end 2T of the cage 2 is inserted with the venturi 3 inserted therein. The filter paper body SF is fitted into the outside of the cage 2 from the upper end opening SFA side while being in contact with the inner bottom surface portion of the upper surface plate 3A, and the upper end surface of the cage 2
Together with the upper end 2T of the upper surface of the upper plate 3A.

Next, the inner filler 4 of the bottom plate 4A is inserted from the lower end opening SFB side of the filter paper SF, and the tip end of the filler 4 is inserted into the filter paper SF.
When the lower end 2S of the cage 2 passing through the inside of the filter paper body SF is adhered to the inner upper surface of the bottom plate 4A together with the lower end face of the filter paper body SF, as shown in FIG. The filter 1 can be configured.

The filter device for a pulse jet type dust collector according to the present invention has the above-described configuration, and includes a filter paper body SF.
Since the cage 2 inserted into the inside and reinforcing the cage is formed using a flexible synthetic resin basket-shaped pipe, the filter paper is filtered by pulse jet air for dust removal blown through the venturi 3. When the body SF expands outward, the cage 2 also deforms and absorbs the compressive force in the height direction, so that the force applied to the upper and lower ends of the filter paper body SF is adjusted softly to prevent the filter from being damaged. Can be eased.

Further, since the parts to be assembled to the filter paper body SF, including the cage 2 and the venturi 3, are all made of synthetic resin, the manufacturing cost can be reduced and the filter 1 is disposed of as waste material. In addition, there is no need to disassemble and separate from metal, and it can be disposed of without any modification.

[0022]

The filter device for a pulse jet type dust collector according to the present invention is as described above. Since a flexible synthetic resin basket-shaped pipe is used as a reinforcing cage, the filter is required. It has the advantage of prolonging the service life, and because no metals are used, it can be easily disposed of, and all parts are made of synthetic resin. Since it is also possible to use a commercially available basket-type pipe as it is, the overall manufacturing cost is greatly reduced, and the filter itself has the rationale of being disposable.
It is extremely innovative and useful as a filter device for a pulse jet type dust collector.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view showing an entire filter device for a pulse jet type dust collector according to the present invention.

FIG. 2 is a plan view partially cut away.

FIG. 3 is a perspective view of a synthetic resin cage used in the present invention.

FIG. 4 is an exploded perspective view showing the entire filter device for a pulse jet type dust collector according to the present invention.

FIG. 5 is an exploded perspective view showing the entire filter device of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter device 2 Synthetic resin cage SF Filter paper body SFA Upper end port SFB Lower end port 3 Venturi 3A Top plate 4 Filler 4A Bottom plate

Claims (2)

[Claims] 1. A filter for a pulse jet type dust collector in which a reinforcing cage is inserted inside and a venturi for blowing compressed air is attached to an upper end opening, wherein the reinforcing cage is made of synthetic resin, In addition, a filter device for a pulse jet type dust collector, wherein the filter device is constituted by using a cage-type pipe having a vertical or horizontal or oblique lattice shape having flexibility. 2. A cage made of a synthetic resin cage having a basket-like pipe shape, wherein a top plate and a bottom plate attached to an upper end and a lower end of a filter are integrally formed using synthetic resin, including a venturi on the upper plate. 2. A filter device for a pulse jet type dust collector according to claim 1, wherein said upper and lower plates are adhered and integrated at both upper and lower ends.