JP3991494B2 - Bug filter retainer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag filter retainer that can greatly improve the dust removal effect during a pulse.
[0002]
[Prior art]
Conventionally, as a bag filter retainer used in a dust collector equipped with an outer surface filtering bag filter, a plurality of rings in which a plurality of vertical wires arranged in a vertical cylindrical shape are arranged at a predetermined interval between the upper and lower sides. A vertically long cage-like retainer body connected by a material is widely used.
[0003]
However, in this type of conventional bag filter retainer, since the vertical wire is made of a straight one, when the tubular filter cloth (filter bag) is attached, the filter cloth and the vertical wire extend over the entire length. For this reason, when dust adhered to the surface of the filter cloth was removed, the pulse pressure was applied evenly to the entire filter cloth, and sufficient removal could not be performed unless the pulse pressure was significantly increased. Therefore, the diameter of the retainer can be reduced or handled by increasing the pulse pressure. In the former case, wrinkles are generated over the entire length of the filter cloth, leading to faster breakage and a reduction in filtration capacity. On the other hand, in the latter case, there is a problem that the life of the filter cloth is shortened, and there is a problem that the energy cost is increased and the running cost is increased.
[0004]
[Problems to be solved by the invention]
The present invention solves the conventional problems as described above, greatly improves the dust removal effect when dust is wiped off, can extend the life of the filter cloth, and also has a large energy saving effect and running. The present invention has been completed for the purpose of providing a retainer for a bug filter that can be manufactured at a low cost.
[0005]
[Means for Solving the Problems]
The bag filter retainer of the present invention, which has been made to solve the above problems, is a vertically long structure in which a plurality of vertical wires arranged in a vertical cylindrical shape are connected by a plurality of ring materials arranged at a predetermined interval. The bag filter retainer having a cage-like retainer body is characterized in that a ring-shaped restricting portion in which a portion between the required ring members of the retainer body is partially narrowed is formed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
The drawing shows a case where it is used in a dust collector equipped with an external filtration bag filter. In FIG. 1, reference numeral 1 denotes a plurality of vertical wires 2 arranged in a vertical cylindrical shape with a predetermined interval between the upper and lower sides. In the present invention, the basic structure of the retainer body 1 is basically the same as the conventional one, but in the present invention, the above-described vertical wire 2 is used. Assuming that a suitable number of concave curved portions 2a are formed in the middle without being straight, a ring-shaped restricting portion 4 that is narrower than other portions between the required ring members 3 and 3 of the peripheral body portion of the retainer main body 1. Is characterized by the formation of And by setting it as such a structure, when a filter cloth is mounted | worn, a filter cloth does not become a contact | adherence state over the full length wire 2 like the conventional, and a clearance gap is formed in the part of the said ring-shaped throttle part 4. Even if the pulse pressure at the time of dust removal is small, vibration is easily started in the ring-shaped restricting portion 3 that is separated from the filter cloth, and the amount of displacement of the filter cloth is increased by the amount of the ring-shaped restricting portion 3. It becomes large and an efficient dust removal process will be performed.
[0007]
The ring-shaped restricting portion 4 described above is formed between all the ring members 3 and 3 as shown in the drawing, and is formed by skipping one pitch, for example, by removing only the uppermost portion or the lowermost portion. It can be formed at a required position such as between the ring pitches. In addition, in order to form the ring-shaped drawn portion 4, a processed wire in which a portion where the ring-shaped drawn portion 4 is to be formed in advance is processed into a bent concave portion may be used as the vertical wire 2. Alternatively, a conventional retainer body may be formed of the vertical wire 2 and the ring-shaped throttle portion 4 may be narrowed by post-processing.
[0008]
Furthermore, it is preferable that the outer diameter of the ring-shaped drawn portion 4 is drawn to 70 to 95% of the outer diameter of the retainer body 1. The reason is that if it is larger than 95%, a sufficient gap is not formed between the filter cloth and efficient dust removal treatment, whereas if it is smaller than 70%, the displacement of the vertical wire 2 is large. This is because it takes time and effort to process, and there is a risk that strength may be reduced. Of course, the number of the ring members 3 and the vertical wire members 2 can be arbitrarily designed.
[0009]
【Example】
12 vertical wire rods with a length of 3500 mm are arranged in a vertical cylinder shape so as to have a diameter of about 150 mm, and 13 ring members with an outer diameter of 160 mm are arranged on the outside at regular intervals of 250 mm to contact each other. The portion is fixed by means of welding or the like to form a vertically long cage shape, and further, in the peripheral body portion, all the vertical wire members 2 between the ring members 3 and 3 are squeezed to form a ring-shaped drawn portion having an outer diameter of 145 mm. When a bag filter equipped with a cylindrical bag-like filter cloth is used for the cylindrical retainer body, the relationship between the air volume and pressure loss and the filtration speed and pressure loss is measured. The case where the same size bag filter equipped with a cylindrical bag-like filter cloth is used for the cylindrical retainer body using 24 is a comparative example 1, and a cylindrical shape using 12 vertical wires as in the embodiment. In the retainer body of the cylindrical bag shape The same measurement was carried out as Comparative Example 2 using the same size bag filter equipped with a filter cloth, and the results are shown in FIGS. 2 and 3 as ● in Comparative Example 1 and ■ in Comparative Example 2. . As a result, when the ring-shaped throttle part is provided, the pressure loss reduction effect of 50 to 60 mmAq (490 to 588 Pa) can be achieved at a filtration rate of 1 to 1.7 m / min as compared with the conventional example without the ring-shaped throttle part. It was confirmed that there was (▲ in the graph).
[0010]
【The invention's effect】
As is clear from the above explanation, the present invention can greatly improve the dust removal effect at the time of dust removal and extend the life of the filter cloth, and also has a large energy saving effect and low running cost. It can be said that.
Therefore, the present invention eliminates the problems of the prior art, and combines with the advantage that the structure is simple and can be provided at low cost, and it contributes greatly to the development of the industry.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is a graph showing the relationship between air volume and filter cloth pressure loss.
FIG. 3 is a graph showing the relationship between filtration speed and filter cloth pressure loss.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Retainer main body 2 Vertical wire material 3 Ring material 4 Ring-shaped throttle part

Claims (2)

For bug filters, a plurality of vertical wire rods (2) arranged in a vertical cylindrical shape are connected by a plurality of ring members (3) arranged at a required interval to form a vertically long cage-like retainer body (1). In the retainer, a bag filter characterized in that a ring-shaped restricting portion (4) partially narrowed between the required ring materials (3) and (3) of the peripheral body portion of the retainer body (1) is formed. Retainer. The bag filter retainer according to claim 1, wherein an outer diameter of the ring-shaped restrictor (4) is 70 to 95% of an outer diameter of the retainer body (1).

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