JP3457136B2 - Filter device for pulse jet type dust collector - Google Patents

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 dust collector configured to blow off the dust adhering to a filter by a dust collecting operation by blowing compressed air into the inside of the filter. More specifically, the present invention relates to a filter device suitable for use in this pulse jet dust collector.

[0002]

2. Description of the Related Art A conventional filter used in a pulse jet dust collector has a star-shaped cross section (pleats) as disclosed in, for example, JP-A-63-319018 or JP-A-8-38839. A metal cage is fitted into the inside of a filter paper body (filter) formed into a mold to reinforce the form of the filter paper body.

FIG. 5 is an exploded perspective view for explaining the structure of the filter device described in the above-mentioned Japanese Patent Laid-Open No. 8-38839, in which SF is a filter paper body (filter) formed in a substantially star-shaped cross section, Reference numeral 11A is a top plate attached to the upper end port SFA of the filter paper body SF, 11 is a venturi for blowing compressed air integrally formed on the top plate 11A, and 10 is a shape-reinforcing metal constituted by a vertical rod 10a ... and a horizontal rod 10b. The cage is made of metal, 12 is an internal filler inserted inside the filter paper body SF, and 14 is 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 respective members as shown in the drawing, the T-shaped rod 13T is provided in the shaft hole 14a of the bottom plate 14.
By inserting the tip portion 13a of the mold bolt 13 and then fitting and tightening the washer 14a and the nut 15, the top plate 11A and the bottom plate 14 are fixed to the upper and lower end openings 10T and 10S of the metal cage 10. The filter for the pulse jet dust collector is assembled with the metal cage 10 inserted in the filter paper body SF.

The filter configured as described above collects dust in the filter paper body SF and discharges only clean air by circulating air containing dust from the outside toward the inside during normal dust collecting operation. On the other hand, this filter paper body SF
If the dust is trapped in the
By ejecting the pulse jet air toward the inside of the filter paper body SF through the venturi 11, the filter paper body S
The entire F is bulged outward so that dust adhering to the outer peripheral surface thereof is removed.

[0006]

However, when the filter paper body SF bulges outward due to the blowing of the pulse jet air as described above, the entire length of the filter paper body SF is forced in the direction of contraction (direction of shortening). On the other hand, the metal cage 10 formed by using a round bar of iron material or the like does not deform and maintains the previous shape and the vertical distance between the upper and lower double-sided plates 11A and 14 as they are. There has been a problem that tensile force, frictional force, etc. are applied around the upper and lower attachment parts of the body SF to damage the parts, and the life of the filter is shortened.

Therefore, the technical problem to be solved by the present invention is that, even if the outward bulge is repeated due to the blowing of pulse jet air, no force acts on the periphery of the upper and lower mounting portions of the filter, and the portion is damaged. Is to prevent the occurrence of such a problem and prolong the life of the filter.

[0008]

[Means for Solving the Problems] Means taken in the present invention for solving the above technical problems are as follows.

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

(1) The cage for reinforcement is made of synthetic resin and is blown with the compressed air.
And, following the bulge of the filter, it can be deformed outward and lengthwise
Use a basket-type pipe in the form of vertical and horizontal or diagonal grids with excellent flexibility. (Claim 1)

(2) The upper plate and the bottom plate which are attached to the upper and lower ends of the filter are integrally molded using synthetic resin including the venturi on the upper plate side, and a cage-shaped cage made of synthetic resin. These upper and lower plates should be bonded to the upper and lower ends of the to integrate them. (Claim 2)

According to the means of claim 1 described in the above (1), when the pulse jet air is blown into the inside of the filter (filter paper body) through the venturi, the entire filter bulges outward and the length direction (up and down) is increased. Direction), but the cage-shaped pipe-shaped synthetic resin cage for reinforcement inserted inside also follows the bulge of this filter and moves outward.
Since it deforms in the length direction, it can absorb the compressive force applied to the filter softly and prevent damage to that part, prolonging the life of the filter, and the outer peripheral direction of the filter along with the deformation of the synthetic resin cage. Since the spread of the dust will increase, it will be possible to further enhance the effect of removing adhered dust.

According to the second aspect of the invention described in (2) above, all of the top plate and the bottom plate including the venturi and the reinforcing cage are made of synthetic resin. Since these upper and lower plates can be easily adhered to and integrated with both upper and lower ends of the structure, the structure is simplified and cost can be reduced. Since it is not used, the filter can be disposed of as it is without any disassembly or separation when treating it as a waste material.

As described above, the above (1),
By solving the technical problem described above by means of (2),
It is possible to solve the problems of the conventional technology.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described with reference to the drawings.
FIG. 1 is a partially sectional front view of a filter device for a pulse jet 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 tubular shape having a substantially star-shaped (pleated shape) cross-section as shown in FIG. 2, and various synthetic resin parts to be attached to the filter paper body SF. It is composed 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 opening SFA and the lower end opening SFB of the filter paper body SF, and The venturi 3 is integrally formed on the top plate 3A, and the inner filling body 4 is integrally formed on the bottom plate 4A.

[0017] Among the parts such this, such as, in particular hair for reinforcement
The page 2 is made of a synthetic resin material having flexibility and strength such as high-density polyethylene, and as a whole, as shown in FIG. 1 or 3, the vertical rod 2A ... And the horizontal rod 2B. Are formed in a substantially basket-shaped pipe shape that is a lattice shape in which the above are orthogonalized, or a lattice shape in which they are diagonally intersected.

FIG. 3 is a perspective view showing a state in which the filter device according to the present invention is assembled. At the time of assembling, first, the venturi 3 is inserted into the upper end 2T of the cage 2. While abutting on the inner bottom surface of the top plate 3A, the filter paper body SF is fitted on the outside of the cage 2 from the upper end port SFA side so that the upper end surface is the cage 2
Of the upper plate 2A and the upper end 2T thereof are bonded to the inner bottom surface of the upper plate 3A.

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

The filter device for the pulse jet type dust collector according to the present invention has the above-mentioned construction and has the filter paper body SF.
Since the cage 2 which is inserted into the inside of and is reinforced by the cage pipe made of a synthetic resin having flexibility, it is filtered by the pulse jet air for dust removal blown through the venturi 3. When the body SF bulges outward, the cage 2 also deforms outward and in the lengthwise direction to absorb the compressive force in the lengthwise direction. Therefore, the force applied to the upper and lower ends of the filter paper body SF can be adjusted softly. Thus, damage to the filter can be mitigated.

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

[0022]

The filter device for a pulse jet dust collector according to the present invention is as described above, and is a cage made of synthetic resin having flexibility capable of deforming outward and lengthwise as a reinforcing cage. Since a mold pipe is used, it has the advantage of extending the life of the filter, and since no metal is used at all, it can be easily disposed of, and all parts are made of synthetic resin. Yes, and
Since it is also possible to use a commercially available basket type pipe as a cage for reinforcement as it is, it also has the rationality that the overall manufacturing cost can be significantly reduced and the filter itself can be disposable. It is a revolutionary and useful filter device for dust collectors.

[Brief description of drawings]

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

FIG. 2 is a plan view similarly showing a part of the structure by breaking.

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

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

FIG. 5 is an exploded perspective view of the entire conventional filter device.

[Explanation of symbols]

1 Filter device 2 Synthetic resin cage SF filter paper body SFA top end SFB bottom end 3 Venturi 3A Top plate 4 Packing body 4A bottom plate

Continuation of the front page (56) Reference JP-A-8-10542 (JP, A) JP-A-8-38839 (JP, A) JP-A-8-38840 (JP, A) JP-A-7-204435 (JP , A) Japanese Unexamined Patent Publication No. 8-141340 (JP, A) Kaikai 3-98921 (JP, U) Jitsuko Sho 35-21677 (JP, Y1) Registered utility model 3000497 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) B01D 46/04 B01D 46/02 B01D 46/52

Claims (2)

(57) [Claims] 1. A filter device for a pulse jet 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. And above
When compressed air is blown in, it will follow the swelling of the filter.
Therefore, a filter device for a pulse jet type dust collector, which is configured by using a basket-type pipe having vertical and horizontal or diagonal lattice shapes having flexibility that can be deformed in the outward direction and the longitudinal direction . 2. An upper surface plate and a bottom plate attached to the upper end opening and the lower end opening of the filter are integrally molded using a synthetic resin including a venturi on the upper surface plate side, and a cage made of a synthetic resin cage having a cage pipe shape. The filter device for a pulse jet dust collector according to claim 1, wherein the top plate and the bottom plate are bonded and integrated to both upper and lower ends.