JP3252643B2 - Retainer for bag filter type dust collector and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag filter type dust collector for filtering dust in exhaust gas from a boiler or the like through a filter, and more particularly to a cylindrical or envelope-shaped (flat) dust collector provided along the vertical direction in the dust collector. The present invention relates to a support frame (hereinafter, referred to as a “retainer”) for supporting a bag-like filter cloth.

[0002]

2. Description of the Related Art FIG. 4 is a view showing a conventional retainer 1 for a bag filter type dust collector. This retainer 1
As shown in the figure, the filter cloth is formed in a tubular and basket shape by vertical and horizontal wires 2 and 3 so as to support a cylindrical or envelope-shaped filter cloth in the vertical direction. A venturi tube 4 for keeping the inside of the filter cloth at high pressure at the time of back washing by pulse jet is attached to the upper end portion where the retainer 1 is attached (FIG. 4 (a) to FIG.
(c)) or bent part 5 for suspending retainer 1
Is formed (FIG. 4 (d)). On the other hand, a disc-shaped bottom plate 6 is attached to the other end serving as the bottom of the retainer 1 by welding, and clean gas that has passed through the filter cloth from the outer peripheral side to the inner peripheral side of the retainer 1 is opened at the upper end of the retainer 1. Part (base part).

[0003] The retainer 1 having the above structure is manufactured as follows. First, the wire is rolled up and the ring (horizontal wire) 3,
3 are arranged at predetermined intervals, and the vertical wire 2 is welded over the rings 3, 3. After the vertical wires 2 are attached at predetermined angles on the rings 3, 3,... To form a cage, the venturi tube 4 is attached to one end of the vertical wires 2, 2,.

[0004] Vertical and horizontal wires 2 forming the retainer 1
As 3 (material), a galvanized wire (iron wire or steel wire galvanized) or a stainless steel wire has been used. However, the galvanized wire has a too short life as a retainer for a dust collector. In addition, the stainless steel wire has a short life in a general refuse incinerator, but has a short life due to boundary cracking in an atmosphere containing a large amount of sulfur S such as a boiler. Therefore, the present applicant has previously proposed using an aluminum-coated steel wire for the wires 2 and 3 of the retainer 1. Aluminum-coated steel wires have a long life without being corroded even in a sulfur atmosphere, and have a life equivalent to stainless steel even in a garbage incinerator, and are promising materials for practical use in the future.

FIG. 5 is a diagram showing a procedure for manufacturing the retainer 1 using an aluminum-coated steel wire. A flat net (weld wire net) 7a is formed by welding aluminum-covered steel wires to be the vertical and horizontal wires 2 and 3 of the retainer 1 and bent into a semi-cylindrical shape, followed by a pair of semi-cylindrical nets 7b. , 7b are jointed using aluminum sleeves 8,8. Half cylindrical net 7
For the joints b and 7b, the wires 3a are inserted into the aluminum sleeves 8 from both sides, and the aluminum sleeves 8
This is done by caulking. Thereafter, the venturi tube 4 is attached to one end of the connected semi-tubular nets 7b, 7b, and the bottom plate 6 is attached to the other end.

FIG. 6 is a view showing a long retainer.
A pair of semi-cylindrical nets 7b, 7b, which are connected in a cylindrical shape, are joined in the longitudinal direction (longitudinal direction) using aluminum sleeves 8, 8,. Particularly in the example shown in FIGS. 6 (b) and 6 (c), in order to prevent the aluminum sleeve 8 from dropping due to loosening.
Of the 16 vertical wires 2, 2... Connected to each other, twelve vertical wires 2, 2,.
8, and the remaining four wires are extended to the other side of the horizontal wire 3, and a bent portion 9 is formed so as to straddle the horizontal wire 3.

[0007]

In the conventional method of manufacturing the retainer 1, as described above, the flat net 7a is bent into a semi-cylindrical shape, which is assembled using the aluminum sleeve 8. However, in such a method, a large number of aluminum sleeves 8 must be used until the semi-cylindrical nets 7b are assembled into a predetermined shape.
There is a drawback that the number of manufacturing steps and costs are high.

In particular, when a retainer as long as about 6 m is manufactured, a total of six divisions, three in the vertical direction and two in the horizontal direction, are assembled using the aluminum sleeve 8. In this case, the vertical connection is made. The aluminum sleeves 8 for the number of the vertical wires 2 are required for one part, and two aluminum sleeves 8 are required for one horizontal wire. Therefore, a huge number of aluminum sleeves 8 are required to obtain a long retainer.
Was necessary, and it was very hand-processed.

In the example shown in FIG. 6, there are a total of 78 connecting parts A, A at two locations in the vertical direction, and 54 in the horizontal direction, which is twice the number of the horizontal wires 3 of 27. Aluminum sleeve 8 is used.

An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a method of manufacturing a retainer for a bag filter type dust collector which can be manufactured very easily without using an aluminum sleeve.

[0011]

In order to achieve the above object, a method of manufacturing a retainer for a bag filter type dust collector according to the present invention comprises an aluminum- coated steel wire as a vertical and horizontal wire of the retainer.
Creating a flat net by performing spot welding using
After that, both ends of the horizontal wire are bent at substantially right angles to form a bent portion.
Then, the net is bent by a bender and formed into a tubular shape.

[0012] In the present invention, prior to bending the flat net into a tubular shape, folding the upper end of the vertical wire into a substantially U-shape
Bending, and bending the lower end of the vertical wire into a substantially U-shape,
When the flat net is formed into a tubular shape by bending, the base and the bottom of the retainer may be formed.

[0013]

[0014]

[Action] A flat net made of vertical and horizontal wires,
If the bender is rolled and formed into a cylindrical shape at once, there is no need to use an aluminum sleeve as in the related art, and the retainer can be manufactured extremely simply and quickly.

Before bending the flat net into a cylindrical shape, both ends of the vertical wire are bent into a predetermined shape and size, and when the flat net is formed into a cylindrical shape, the shape of the base portion and the bottom portion of the retainer is formed. Is formed, there is no need to weld the bottom plate as in the prior art.

In addition, if a bent portion is formed by bending both ends of the horizontal wire at the butted portion of the horizontal wire, the flat portion is formed into a tubular shape so that the butted portion is not easily opened. can do.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a view showing a schematic configuration of a bag filter type dust collector retainer 11 of the present embodiment, and here shows a long one having a length of about 6 m. Retainer 1
As shown in the figure, 1 is formed in a tubular and basket shape by vertical and horizontal wires 12 and 13 made of aluminum-coated steel wire. The horizontal wires 13 are for holding the vertical wires 12, 12,... Parallel to each other, and are provided at predetermined intervals in the vertical direction. Further, it is formed in a ring shape (substantially octagon in the illustrated example) by bending a linear wire. Bends 15a and 15b bent toward the center of the ring are formed at the butting portion 14 of the horizontal wire 13. These bent portions 15a and 15b are formed by bending both ends of the horizontal wire 13 at substantially right angles in a straight line before forming the horizontal wire 13 into a ring shape.

The vertical wires 12, 12,... Are mounted on the outer circumference of the ring-shaped horizontal wires 13, 13,. A hook 16 for suspending the retainer 11 is provided at one end of the vertical wire 12 serving as a mounting portion (a base) of the retainer 11, and a bottom portion 1 is provided at the other end serving as a bottom.
7 are formed. The hook 16 is formed by the vertical wire 12,
Are formed by bending the ends of the vertical wires 12 outward in a substantially U-shape, and the bottom portion 17 is formed by bending the other ends of the vertical wires 12, 12 inward (center side) in a substantially U-shape. Have been.

Reference numeral 18 denotes an aluminum plate provided on the bottom portion 17.

Next, a method of manufacturing the retainer 11 will be described.

First, as shown in FIG. 2 (a), flat nets (weld metal nets) 21 are made of aluminum-coated steel wires (AS wires) 12 and 13 having different lengths. Here, the dimensions of the net 21 are
The width D is about 400 mm and the length L is about 6000 mm. Specifically, the aluminum-coated steel wire 1 serving as the vertical wire of the retainer 11
Are arranged at intervals, and aluminum-covered steel wires 13, 13 to be horizontal wires are arranged orthogonally thereon. In this state, the intersection of the aluminum-coated steel wires 12 and 13 is spot-welded by a multipoint automatic welding machine.

When the flat net 21 is made, next, as shown in FIG. 2 (b), one end of each of the vertical wires 12, 12,... Is bent into a substantially U-shape, and the other end is turned to the opposite side. Is bent into a substantially U-shape, and a hook portion (base portion) 16 of the retainer 11 is bent.
And the shape of the bottom portion 17 are formed.

When the shape of the hook portion 16 and the bottom portion 17 of the retainer 11 is formed, as shown in FIG. 2C, both ends of the horizontal wires 13, 13,... The bent portions 15a and 15b are formed by bending by 90 ° (actually by bending at an angle smaller than 90 °).

When a predetermined bending process is performed along the side edge of the flat net 21 in this way, the flat net 21 is set on a bender (bending machine) (not shown) and bent by a pressing die. Apply. At this time, the net 21
Are bent at once into a substantially octagonal cross section to form a tube.

As a result, a hook portion 16 and a bottom portion 17 are formed at both ends of the cylindrical body (that is, the vertical wire 12), and the bent portions 15a and 15b of the butted portion (both ends of the horizontal wire 13) are formed.
15b are butted against each other to form a butted portion 14.

After the flat net 21 is formed into a cylindrical shape,
To prevent the bent portions 15a, 15b from opening, the horizontal wires 13,
13 are bent at a position C (FIG. 1 (b)) 180 ° opposite to the bent portions 15a and 15b. That is, the flat net 21
Are bent at once, the bent portions 15a, 15b may be opened due to the springback of the horizontal wires 13, 13,. In this embodiment, the horizontal wires 13, 13,... Are fixed by a jig or the like, and the opposite side C is pushed toward the center of the ring, so that the bent portions 15a, 15b can be kept in a state of being in reliable contact with each other. .

As described above, the retainer 1 of this embodiment is
In the manufacturing method 1, the flat net 21 made of the vertical and horizontal wires 12 and 13 is rounded at once by a bender and formed into a cylindrical shape. It is not necessary to assemble with the aluminum sleeve, and the retainer 11 can be manufactured extremely easily and quickly.
Particularly, in the case of a retainer having a length of about 6 m, conventionally, as many as 78 aluminum sleeves 8, 8,... As shown in FIG. Since such a manual operation is not required, the number of manufacturing steps and costs are greatly reduced, and the method is suitable for mass production.

Further, in the manufacturing method of the present embodiment, before bending the flat net 21, the vertical wire 1
Since both ends of 2, 12,... Are bent into a predetermined shape and size to form the hook portion 16 and the bottom surface portion 17 of the retainer 11, a step of bending the above vertical wire members 12, 12,. The hook 16 and the bottom 1
7 can be formed. The shape of the mounting portion of the retainer 11 differs depending on the type and purpose of the dust collector, and there is no problem because the venturi tube may be mounted. However, the bottom of the retainer 11 is attached to the bottom plate 6 by welding.
This causes an increase in the number of manufacturing steps. In this embodiment, since the bottom portion 17 is formed by the vertical wires 12, 12,... Of the retainer 11, there is no need to attach a bottom plate, and the number of manufacturing steps and costs can be reduced.

In addition, by substituting the bottom plate at the bottom of the retainer with a wire, it is possible to obtain a retainer shape that does not easily damage the filter cloth.

Further, according to the manufacturing method of this embodiment, FIG.
As shown in FIG.
2 ... can also be attached. In the conventional manufacturing method, as already described with reference to FIG. 4, the rings 3, 3,... Are formed, and the vertical wire 2 is spot-welded on the rings 3, 3,.
The vertical wire 2 is always welded to the outside. In such a structure, burrs are generated outside the retainer 1 by welding, and the filter cloth supported outside the retainer 1 may be damaged (especially in the case of a stainless wire). On the other hand, in the method of bending the flat net 21 using a bender as in this embodiment, the vertical wires 12, 12,... Can be attached inside the rings 13, 13,. Considering the appearance of burrs, a shape that does not damage the filter cloth can be obtained.

In the above embodiment, the retainer 1
Although the aluminum-coated steel wire was used as the vertical and horizontal wires, galvanized wire and stainless wire may be used. However, if an aluminum-coated steel wire is employed, a long-life, low-cost retainer can be obtained.

In the above embodiment, the retainer 11 is formed in a cylindrical shape having a substantially octagonal cross section.

Furthermore, after the flat net 21 is formed into a cylindrical shape, the net 21 is machined from the opposite side so that the abutting portion 14 is not opened, but the bent portions 15a and 15b are put into an aluminum sleeve, and the aluminum sleeve is put on. You may close it and fix it.

[0035]

In summary, according to the present invention, the following excellent effects are exhibited.

[0036] (1) According to claim 1, as a wire material for vertical and horizontal
The flat-plate net made by performing spot welding using an aluminum-coated steel wire was rolled at once by a bender and formed into a tubular shape, eliminating the need to use an aluminum sleeve during production, making it extremely simple and quick. A retainer can be manufactured. Also, when a flat net is formed into a cylindrical shape,
The bent part to be fitted is bent at almost right angles to both ends of the horizontal wire.
Easy to open butted part of flat net
Can be done.

(2) According to the second aspect, when the flat net is formed into a cylindrical shape, the shape of the base portion and the bottom portion of the retainer is formed, so that it is not necessary to mount the bottom plate as in the conventional case. In addition, the number of manufacturing steps and costs can be reduced.

[0038]

(3) According to the third aspect, since the bottom of the retainer is replaced with a wire, a shape with little risk of damaging the filter cloth can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a retainer for a bag filter type dust collector manufactured by the method of the present invention, wherein (a) is a front view and (b) is a cross-sectional view of (a).

FIG. 2 is a view illustrating a method of manufacturing a retainer for a bag filter type dust collector according to the present invention.

FIG. 3 is a schematic view showing another embodiment of the bag filter type dust collector retainer of the present invention.

FIG. 4 is a diagram showing a configuration example of a conventional retainer for a bag filter type dust collector.

FIG. 5 is a view showing a method of manufacturing a retainer using a conventional aluminum-coated steel wire.

FIG. 6 is a diagram showing a configuration example of a long retainer, and (a).
Is a front view with a part omitted, (b) is an enlarged view of the vertical connection part of (a), and (c) is an enlarged view of the horizontal connection part of (a). is there.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Retainer 12 Vertical wire 13 Horizontal wire 14 Butt part 15a, 15b bending part 21 Flat net 16 Hook part 17 Bottom part

Claims (3)

(57) [Claims] 1. A method for manufacturing a bag filter type dust collector retainer, which is formed into a tubular shape with vertical and horizontal wires to suspend a cylindrical filter cloth in the dust collector, wherein the vertical and horizontal wires are used as the vertical and horizontal wires.
After making a flat net by performing spot welding using an aluminum covered steel wire , both ends of the horizontal wire are bent at substantially right angles.
Forming a bent portion by bending the net, and then bending the net by a bender to form a cylindrical shape. 2. The method according to claim 1, wherein the flat plate-like net is bent into a cylindrical shape.
The upper end of the vertical wire is bent into a substantially U shape, and the vertical
The method for manufacturing a retainer for a bag filter type dust collector according to claim 1 , wherein the lower end of the wire is bent into a substantially U-shape . 3. A vertical filter cloth is suspended in a dust collector.
Bag filter type dust collector formed in a tubular shape with horizontal wires
In the retainer, the both ends of the horizontal wire are bent at substantially right angles.
To form a bent portion, and the upper end of the vertical wire is
It is bent into a substantially U-shape to form a hook,
Lower end bag filter dust collector retainer, characterized in that by forming a bottom surface portion is bent into a substantially U-shaped the vertical wire.