JP3310725B2 - Dust collection filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to dust collection used for collecting harmful dust in a production line, collecting excess powder in a powder coating system, or collecting powder in a powder classification system. It is about filters.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 9, a dust collecting filter accommodates a hollow filter element 22 in a metal housing 21 into which dust-containing air is introduced. A structure in which the exhaust portion 23 is connected to the upper opening is generally used.

In such a dust collecting filter, dust of the dust-containing air introduced into the housing 21 is collected on the outer surface of the filter element 22, and the filtered air passes through the hollow filter element 22 through the upper opening. From the exhaust port 23.

[0004]

However, since dust adheres to the outer surface of the filter element 22, backwash air is sometimes introduced into the filter element 22 to remove the adhering dust and remove the dust. Element 22
Does not cause clogging, but after a certain period of use, the filter element 22 must be replaced.

However, when the filter element 22 is pulled out of the housing 21, dust adhering to the outer surface of the filter element 22 often falls and contaminates the surroundings. So that they are not scattered or damaged
It is necessary to carefully pull out or insert the filter element 22 from the housing 21, and there is a problem that workability is extremely poor.

[0006] Further, since the above-mentioned conventional dust collecting filter accommodates the filter element 22 in the housing 21 so as to be freely inserted and removed, the overall size of the device is large.
And the weight is heavy. This is one of the major problems for a dust collection filter which is often installed at a high place, and a reduction in size and weight is desired.

Conventionally, self-supporting filter elements include those made of ceramics and resins.
These have problems that they are heavy and have a large pressure loss during dust collection.

Accordingly, the present invention is intended to provide an inexpensive dust collection filter which does not require the filter element to be taken in and out of the housing and needs to be replaced, and which can be reduced in size, weight, and pressure loss.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has an attachment portion for an air supply portion for dust-containing air at one end and an attachment portion for an exhaust portion for filtered air at the other end. The interior of the housing is divided into a large number of dust-containing air flow passages and filtered air flow passages by a self-supporting fiber filter element joined to the housing, and the dust-containing air supply section is Open the dust air flow passage, close the filtration air flow passage, and on the exhaust air side of the filtration air,
The dust-containing air passage was closed, and the filtered air passage was opened.

As the self-supporting fiber constituting the filter element, a polyester needle felt impregnated with an acrylic resin can be used.

[0011]

The dust-containing air supplied from the air supply unit attached to one end of the housing flows into the dust-containing air flow passage from the opening of the dust-containing air flow passage. Since the dust-containing air flow passage and the adjacent filtered air flow passage are separated by a self-supporting fiber filter element, the dust-containing air flowing into the dust-containing air flow passage is filtered by the filter element, The filtration air flows into the filtration air flow passage and is exhausted from the opening of the filtration air flow passage to the exhaust part.

The replacement of the filter element forming the dust-containing air flow passage and the filtration air flow passage can be performed integrally with the housing because the filter element is integrally bonded to the housing.

Further, since the filter element is made of fiber, it is lightweight and inexpensive, and has a small pressure loss.

[0014]

Embodiments of the present invention will be described below.

The dust collection filter shown in FIGS. 1 to 5 is one in which a housing 1 and a filter element 2 are integrated.

The housing 1 is a quadrangular cylindrical member having upper and lower outer peripheral surfaces formed with air supply portions 3 for dust-containing air a and mounting flanges 5 and 6 for an exhaust portion 4 of filtered air b. The inside is divided into a large number of dust-containing air flow passages 7 and filtered air flow passages 8 by the filter body 2.
Is formed in a cylindrical shape.

This housing may be made of resin or metal.

As shown in FIG. 5, the air supply section 3 below the dust-containing air flow passage 7 is open, and the upper exhaust section 4 is closed as shown in FIG. I have.

On the contrary, the lower air supply section 3 side of the filtered air flow passage 8 is closed as shown in FIG. 5, and the upper exhaust section 4 side is opened as shown in FIG. Have been.

The filter element 2 is made of self-supporting fibers. Here, the term “independence” refers to having shape retention during dust collection without using a retainer. As such a fiber having self-supporting properties, a polyester needle felt impregnated with an acrylic resin can be used, and its surface is desirably coated with a release resin such as ethylene tetrafluoride. . Specific examples of the polyester needle felt include a permeation of 4 to 5 cc / cm ² / min at a basis weight of 400 to 500 g / m ² and 12.7 mmAq, and a heat resistance temperature of 1
Some are at 50 ° C.

The housing 1 and the filter element 2
As a method of integrating the resin housing 1
In the case of (1), a large number of cylindrical filter elements 2 are housed in a resin cylinder, and both are thermally bonded to each other. Alternatively, a large number of cylindrical filter elements 2 are 2, a method of pouring resin into a molding die to integrate the housing 1 and the filter element 2, a method of pushing the filter element 2 into the housing 1 without adhering to the housing 1, and integrating the same. There is. Further, the filter elements 2 may or may not be bonded to each other. In the case of the metal housing 1, a method of bonding the filter element 2 to the metal cylinder with an adhesive, or a method of pushing the filter element 2 into the metal cylinder and integrating them is used. is there.

The dust-containing air supply section 3 is provided with a dust-containing air inlet 9 on the side, a mounting flange 10 on the upper surface, and a hopper 11 below.

On the other hand, the exhaust part 4 of the filtered air b is formed with a filtered air outlet 12 on the side and a mounting flange 13 on the lower surface. A backwash nozzle 14 is provided in the exhaust portion 4 toward an opening above the filtered air flow passage 8. The compressed air tank 15 and the backwash valve 16 allow the backwash nozzle 14 to pass through the filtered air flow passage 8. Backwash air is blown into the inside 8 at regular intervals.

The housing 1 and an air supply section 3 for dust-containing air a
The mounting flanges 5 and 10 of the two can be abutted with each other via a packing 17 and bolts 18 can be used. Further, the housing 1 and the filtered air b
The mounting flange 6 for both of them is also attached to the exhaust part 4.
13 can be fixed by bolts 19 via packing 18. These fixing means can be performed not only by bolts but also by clamps.

In the above embodiment, the dust-containing air inlet 9
The dust-containing air “a” supplied into the air supply unit 3 flows into the dust-containing air flow passage 7 from an opening below the dust-containing air flow passage 7,
The air is filtered by the filter element 2 forming the dust-containing air flow passage 7, and the filtered air b flows into the filtered air flow passage 8 formed between the adjacent filter bodies. Then, the filtered air b flowing into the filtered air flow passage 8 flows into the exhaust unit 4 from the upper opening, and is exhausted from the filtered air exhaust port 12.

As described above, the dust-containing air a is filtered by the filter element 2 forming the dust-containing air flow passage 7, and the dust is collected on the surface of the filter element 2 forming the dust-containing air flow passage 7. You. The dust collected on the surface of the filter element 2 is blown off to the lower hopper 11 by backwash air blown into the filtration air flow passage 8 at regular intervals from the upper opening of the filtration air flow passage 8.

Next, FIG. 6 shows another embodiment of the dust collecting filter. This dust collecting filter is substantially the same as that of the first embodiment. However, in the first embodiment, the cylindrical dust-containing air flow passage 7 is formed in the housing 1 in a cylindrical shape. Although the filter element 2 is formed to accommodate the filter element 2, in this embodiment, the cylindrical dust-containing air flow path 7 is
A filter element 2 having a waveform in which semicircular arcs are continuous is formed in a housing 1 such that the inner surfaces of the arcs face each other. As described above, the use of the corrugated filter element 2 has an advantage that the surface of the filter body 2 can be easily coated with the release resin.

FIG. 7 shows another embodiment of the dust collecting filter. In this embodiment, the housing 1 includes:
A large number of corrugated filter elements 2 are housed at regular intervals to form a dust-containing air passage 7 and a filtered air passage 8. In this embodiment, the projections collide with each other in the gap between the portions where the projections of the adjacent filter elements 2 face each other due to the bending of the filter elements 2 when backwash air is blown into the filtration air flow passage 8. If it is set to the degree, dust adhering to the surface of the filter element 2 can be effectively removed.

Further, in the embodiment shown in FIG. 8, two sets of filter elements 2 having the waveform shown in FIG. 7 are formed as a set, and the opposing projections are butted against each other so that independent square cylinders are continuously arranged. An independent square tube is used as a filtration air flow passage 8 and a space between each pair is used as a dust-containing air flow passage 7. May be used as the filtered air flow passage 8.

The shapes of the dust-containing air flow passage 7 and the filtration air flow passage 8 of the dust collecting filter according to the present invention are not limited to the above-described embodiment, but may be polygonal such as triangular or square, or elliptical. As described above, it is desirable to form the filter element 2 in a cylindrical shape or a corrugated shape in order to increase the filtration area.

[0031]

As described above, according to the present invention, since the housing and the filter element inside the housing are integrally joined, the filter element can be replaced together with the housing, so that the workability is extremely high. In addition, since the dust is not scattered around when replacing, the working environment is not polluted.

Further, by integrating the fiber filter element with the housing, there is also an effect that the size and weight can be reduced, the pressure loss is small, handling and manufacture are easy, and the housing can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a use state of a first embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a plan view of the above.

FIG. 5 is a bottom view of the above.

FIG. 6 is a cross-sectional view of a second embodiment of the present invention.

FIG. 7 is a cross-sectional view of a third embodiment of the present invention.

FIG. 8 is a cross-sectional view of a fourth embodiment of the present invention.

FIG. 9 is a longitudinal sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Filter element 3 Air supply part 4 Exhaust part 7 Dust-containing air flow passage 8 Filtered air flow passage

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-114177 (JP, A) JP-A 63-136722 (JP, U) JP-A 49-12564 (JP, U) JP-A 62-114 87718 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B01D 39/00-39/20 B01D 46/02

Claims (3)

(57) [Claims] 1. A self-supporting housing having one end having a mounting portion for an air supply portion for dust-containing air and another end having a mounting portion for an exhaust portion for filtered air is integrally joined to the housing. The filter element made of fiber has a large number of dust-containing air flow passages and filtered air flow passages, and the dust-containing air flow passages are opened and the filtered air flow passages are closed at the dust-containing air supply section. And a dust-collecting filter characterized in that the dust-containing air flow passage is closed and the filtered air flow passage is opened on the exhaust air side of the filtered air. 2. The dust collecting filter according to claim 1, wherein the self-supporting fiber is a polyester needle felt. 3. The dust collection filter according to claim 2, wherein the polyester needle felt is impregnated with an acrylic resin.