JP3757014B2 - Retainer / filter cloth assembly of filtration type dust collector and its mounting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retainer / filter cloth assembly of a filtration dust collector and a method for attaching the same.
[0002]
[Prior art]
Conventionally, a filtration type dust collector (bag filter) that removes dust in the air by suspending a woven fabric or other filter cloth in a cylindrical shape and allowing dust-containing air to pass through it has been widely used. Yes.
[0003]
This filter type dust collector uses a filter in which a filter cloth is covered in a cylindrical shape around a retainer that is a frame, that is, a retainer / filter cloth assembly. This filter cloth assembly is used by connecting to a clean air chamber, but as a method of attaching to the clean air outlet on the dust collector body side, a cylindrical shape provided on the ceiling into which dust-containing air before filtration enters A method of inserting a retainer on the width side of the filter cloth, folding the end of the filter cloth inward, inserting the short pipe into the end of the retainer, and fastening the overlapped part with a tightening band from the outside. There is. A so-called venturi is attached to the inside of the cylindrical short tube provided on the ceiling of the dust collector main body to promote the dust removal effect by compressed air, and the negative generated by the pulsed air instantaneously. A large amount of air in the clean room is sent into the retainer by pressure.
[0004]
In addition, as a method of attaching the retainer / filter cloth assembly to the clean air outlet of the dust collector main body, from the room where the filtered clean air of the dust collector main body passes to the room where the dust-containing air before filtration enters. There is a method of inserting into the open opening, that is, the clean air outlet.
[0005]
In addition, as a method of attaching the retainer / filter cloth assembly to the clean air outlet of the dust collector main body, a cylindrical short tube provided on the dust collector main body ceiling into which dust-containing air before filtration enters is used as a filter cloth. There is also a method in which the end of the retainer is inserted into the end of the retainer that is folded inward, and the portion around which the round bar on the edge of the retainer is wound is pressed with a presser fitting.
[0006]
[Problems to be solved by the invention]
When replacing the filter cloth in these retainer / filter cloth assemblies, remove the retainer assembly from the device and replace it, or place it in and out of the dust collector room where clean air passes. However, when the wall or ceiling of the building is close, the retainer assembly cannot be pulled out and cannot be installed in a narrow space. In other words, the installation location is limited to a location where there is enough space for the retainer assembly to be pulled out.
[0007]
In another type of retainer / filter cloth assembly, as a method of attaching to the clean air outlet of the dust collector main body, a cylindrical short provided on the ceiling of the dust collector main body into which dust-containing air before filtration enters. The tube is inserted into the end of the retainer with the end of the filter cloth folded inward, and the part around which the round bar on the edge of the retainer is wound is pressed with a presser fitting, so the filter cloth seal and retainer are attached. Fixing is performed at the same time. For this reason, the bolt must be tightened sufficiently and it is not easy to perform this operation on the ceiling of the room where the dust-containing air before filtration of the dust collector main body flows.
[0008]
The present invention has been made in view of the above points, is easy to assemble, has good workability when attached to the dust collector main body side, and has excellent filtration performance compared to conventional products, and is installed. It is an object of the present invention to provide a retainer / filter cloth assembly for a filtration type dust collector and a method for attaching the same, which can save a large amount of space.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a retainer / filter cloth assembly for use in a filtration type dust collector having a pulse jet type backwash mechanism, and a filter cloth having an air circulation hole in the upper center, A cylindrical retainer comprising an upper end member having a screw hole and a plurality of outer frame members suspended from the outer periphery of the upper end member, and forming a frame for holding the filter cloth on the outer periphery; and an upper end having an external thread on the outer periphery A tightening member including a tube having a lower end fixed to the central screw hole of the member, a trunk having a female screw hole screwed onto the outer periphery of the tube, and a flange provided at one end of the trunk, The periphery of the air circulation hole of the filter cloth is tightly sealed and fixed between the lower end and the upper end member of the retainer.
[0010]
Further, the present invention is characterized in that the filter cloth includes a vertical cylindrical center part and a wing part projecting radially from the center part and communicating with the center part.
[0011]
The present invention also relates to a method of attaching the retainer / filter cloth assembly of the filter type dust collector to the ceiling of the dust collector main body, and a connecting portion fixed to a clean air outlet opening in the ceiling, A fixture having a flange fixed to the flange of the tightening member is used.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a perspective view of a retainer of a retainer / filter cloth assembly according to the present invention.
[0014]
1 has a central portion 1D having a screw hole 1F (shown in FIG. 5) in the center and wing portions 1E projecting radially from the central portion 1D. Can be appropriately increased or decreased), a plurality of outer frame members 1B suspended from the outer periphery of the upper end member 1A, and the outer frame member 1B at appropriate positions in the longitudinal direction (see FIG. In this embodiment, the wire 1C is connected at four points). A tube 2 having a male screw on the outer periphery is screwed into the screw hole of the center portion 1D. The pipe 2 is a separate member from the upper end member 1A in the illustrated embodiment, but may be formed integrally with the upper end member 1A. The retainer 1 is generally formed in a vertical cylindrical shape, and forms a frame for holding a filter cloth 3 to be described later on the outer periphery.
[0015]
FIG. 2 is a perspective view of the filter cloth of the retainer / filter cloth assembly according to the present invention.
[0016]
The filter cloth (filter tube) 3 in FIG. 2 is longer than the retainer 1 to some extent in the vertical direction, and is basically an elongated cylindrical shape having a circumferential length similar to the circumferential length of the retainer 1, It consists of a vertically long wing portion 3A that protrudes radially from the central portion and communicates with the central portion. There are a plurality of wing parts 3A corresponding to the wing parts 1A of the retainer 1 (four in the embodiment shown in the figure, but can be appropriately increased or decreased as necessary). At the upper end, a circular hole 3B for allowing the tube 2 of the retainer 1 to pass through is formed in a cloth in the center of an oval similar to the cross section of the retainer 1. The lower end of the filter cloth 3 extends downward from the retainer 1 and opens.
[0017]
FIG. 4 is a cross-sectional view of the lower part of the retainer / filter cloth assembly according to the present invention.
[0018]
The opening at the lower end of the filter cloth 3 becomes a hole for covering the filter cloth 3 on the retainer 1 from above. When the filter cloth 3 is used as a filter, the opening is attached with a magic tape 3C as shown in FIG. Seal it, pinch it with clips, or seal it with a special lower cap. When the filter cloth 3 is put on the retainer 1, the tube 2 of the retainer 1 protrudes upward from the circular hole 3B of the filter cloth 3 (see FIG. 3).
[0019]
FIG. 3 is a perspective view of the retainer / filter cloth assembly according to the present invention.
[0020]
In the retainer / filter cloth assembly 20 shown in FIG. 3, the filter cloth 3 is placed on the retainer 1 (shown by a dotted line) from above. In the embodiment of FIG. 1, the retainer 1 has four wings 1E, whereas the retainer 1 of the embodiment of FIG. 3 has two wings, It is called. Moreover, the retainer provided with one wing | blade part is called the one-sided plate-type retainer. The opening at the lower end of the filter cloth 3 is sealed with Velcro 3C or the like as described above.
[0021]
FIG. 6 is a perspective view of the fastening member of the retainer / filter cloth assembly according to the present invention.
[0022]
The tightening member 5 of FIG. 6 includes a trunk portion 5C having a female screw hole 5B screwed onto the outer periphery of the tube 2, and a flange (ferrule flange) 5A at one end of the trunk portion 5C. The flange 5A is for connecting to the clean air outlet 11 (shown in FIG. 8) on the ceiling of the dust collector main body.
[0023]
The retainer / filter cloth assembly of the present invention including the filter cloth 3, the retainer 1, the pipe 2, and the tightening member 5 having the above-described configuration is assembled and used as follows.
[0024]
The filter cloth 3 is put on the retainer 1, and the tube 2 of the retainer 1 is protruded upward from the circular hole 3 </ b> B of the filter cloth 3. The opening at the lower end of the filter cloth 3 is closed by any of the above methods. A washer 4 is fitted into the tube 2 protruding from the hole 3B of the filter cloth 3 (see FIG. 8). The tightening member 5 is fitted onto the tube 2 from above the washer 4 with the flange 5A facing upward and tightened. As the tightening member 5 is lowered, the peripheral edge of the circular hole 3B of the filter cloth 3 is clamped between the washer 4 and the center 1D of the retainer 1 and is tightly sealed. The purpose can be achieved without using the washer 4, but the filter cloth 3 is more securely tightened when the washer 4 is used. The retainer / filter cloth assembly in this state is attached to the dust collector main body as described below.
[0025]
FIG. 5 is a plan view of a filtration type dust collector using a plurality of retainer / filter cloth assemblies according to the present invention.
[0026]
FIG. 5 shows a cubic structure of a large number of retainer / filter cloth assemblies 20 using a four-bore type plate retainer according to the present invention and a large number of retainer / filter cloth assemblies 20A using a one-side stretch type plate retainer. The dust collector main body case 12 is vertically inserted from its upper surface to form a large dust collector. Thus, not only one retainer / filter cloth assembly of the present invention is used for one dust collector, but also a plurality of retainer / filter cloth assemblies can usually be used. At that time, when a plurality of retainer / filter cloth assemblies are erected, the wing part 3A of the filter cloth 3 of a certain retainer / filter cloth assembly is replaced with two wing parts 3A of the adjacent retainer / filter cloth assembly, If it inserts so that it may not contact the gap | interval between 3A, many retainer and filter cloth assemblies can be attached in the narrow dust collector main body case 12, and the performance of a dust collector can be improved.
[0027]
Next, a method for attaching the retainer / filter cloth assembly of the present invention to the dust collector main body will be described.
[0028]
FIG. 7 is a perspective view of a fixture used in the method of attaching the retainer / filter cloth assembly of the present invention to the dust collector main body. FIG. 8 is an explanatory view of a schematic configuration of the retainer / filter cloth assembly of the present invention and a method of attaching the retainer / filter cloth assembly to the dust collector main body.
[0029]
7 is used when the retainer / filter cloth assembly of the filter type dust collector is attached to the ceiling 10 of the dust collector main body, and can be opened on the ceiling 10 as shown in FIG. The connecting portion 6A is fixed to the clean air outlet 11 and the flange (ferrule flange) 6B is fixed to the flange 5A of the tightening member 5.
[0030]
The flange 6B of the fixture 6 and the flange 5A of the fastening member 5 are fastened from the outside by a clamp 7. The connecting portion 6 </ b> A is fastened from the outside by a band 8 with a packing 9 sandwiched between the connecting portion 6 </ b> A and the clean air outlet 11.
[0031]
Next, the operation of the filtration dust collector will be described.
[0032]
When a filter-type dust collector having the retainer / filter cloth assembly of the present invention having the above-described configuration is attached to the dust collector body by the above-described mounting method and operated, the dust-containing air is caused by a suction action. The filter cloth 3 is permeated into the retainer / filter cloth assembly. Dust in the dust-containing air adheres to the surface of the filter cloth 3, and the filtered clean air is guided through the hole 3B of the filter cloth 3 through the pipe 2 and the fixture 6 in the direction of the arrow shown in FIG. It flows out from the outlet 11 to the upper part of the ceiling 10 of the dust collector main body.
[0033]
Dust adhering to the surface of the filter cloth 3 is removed at regular intervals by a pulse jet backwashing mechanism. This backwash mechanism instantaneously injects high pressure air into the filter cloth 3 in the direction opposite to the arrow direction (downward) in which clean air flows out from the outlet 11 to vibrate the filter cloth 3 and the high pressure air. The dust on the surface of the filter cloth 3 is removed by reversely permeating the filter cloth 3 from the inside to the outside.
[0034]
【The invention's effect】
As described above, according to the present invention, in the retainer / filter cloth assembly used in the filtration type dust collector having the pulse jet type backwashing mechanism, the filter cloth having the air circulation hole in the upper center, A cylindrical retainer comprising a top end member having a screw hole and a plurality of outer frame members depending from the outer periphery of the upper end member, and forming a frame for holding the filter cloth on the outer periphery; A tightening member including a tube having a lower end fixed to the central screw hole of the upper end member, a trunk having a female screw hole threadedly engaged with the outer periphery of the tube, and a flange provided at one end of the trunk. Since the peripheral edge portion of the air circulation hole of the filter cloth is tightly sealed and fixed between the lower end of the retainer and the upper end member of the retainer, the following extremely excellent effects can be obtained.
(1) Since the filter cloth is sealed when the retainer is assembled, workability is very good.
(2) Since the retainer is attached to the main body of the device, the ferrule flanges are aligned and clamped, and the clamp screw is tightened. Is good.
(3) Some filter surfaces have a cylindrical shape with a star-shaped cross section. When replacing, this assembly is replaced, so even a filter cloth with such a complex cross section can be used easily. It becomes possible.
(4) If the retainer / filter cloth assembly of the present invention is used, in the existing filter type dust collector (bag filter), the filtration area of the filter cloth is about 1.8 with respect to the cylindrical assembly. It can be increased up to about twice.
(5) Use of the ferrule flange in the present invention improves the workability of attaching and detaching the retainer when replacing the filter cloth (fitter tube).
[Brief description of the drawings]
FIG. 1 is a perspective view of a retainer of a retainer / filter cloth assembly according to the present invention.
FIG. 2 is a perspective view of a filter cloth of a retainer / filter cloth assembly according to the present invention.
FIG. 3 is a perspective view of a retainer / filter cloth assembly according to the present invention.
FIG. 4 is a cross-sectional view of the lower part of the retainer / filter cloth assembly according to the present invention.
FIG. 5 is a plan view of a filtration dust collector using a plurality of retainer / filter cloth assemblies according to the present invention.
FIG. 6 is a perspective view of a tightening member of the retainer / filter cloth assembly according to the present invention.
FIG. 7 is a perspective view of a fixture used for the method of attaching the retainer / filter cloth assembly of the present invention to the dust collector main body.
FIG. 8 is an explanatory diagram showing a schematic configuration of a retainer / filter cloth assembly according to the present invention and a method of attaching the retainer / filter cloth assembly to a dust collector main body.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Retainer 1A Upper end member 1B Outer frame member 1C Inner frame 1D Center part 1E Wing part 2 Tube 3 Filter cloth 3A Wing part 3B Air circulation hole 3C Magic tape 4 Washer 5 Fastening member 5A Flange 5B Female screw hole 5C Trunk part 6 Attaching tool 6A Connecting part 6B Flange 7 Clamp 8 Band 9 Packing 10 Ceiling 11 Clean air outlet 12 Dust collector body case 20 Retainer / filter cloth assembly 20A Retainer / filter cloth assembly

Claims (3)

In the retainer and filter cloth assembly used for the filtration type dust collector with pulse jet backwashing mechanism,
A filter cloth with an air circulation hole in the center of the upper part;
A cylindrical retainer comprising an upper end member having a screw hole in the center and a plurality of outer frame members suspended from the outer periphery of the upper end member, thereby forming a frame for holding the filter cloth on the outer periphery When,
A tube having a male screw on the outer periphery and having a lower end fixed to a central screw hole of the upper end member of the retainer;
A tightening member comprising a short tubular trunk portion having a female screw hole screwed into the outer periphery of the tube on the inside, and a flange extending from the trunk portion;
The peripheral edge of the air circulation hole of the filter cloth is hermetically sealed and fixed between the lower end of the tightening member and the upper end member of the retainer, and provided on the flange and the dust collector side of the tightening member A retainer / filter cloth assembly for a filtration dust collector, wherein the attachment is connected to the flange of the mounting tool .   2. The filter type dust collector retainer and filter cloth assembly according to claim 1, wherein the filter cloth comprises a vertical cylindrical center part and a wing part projecting radially from the center part and communicating with the center part. body. In the method of attaching the retainer / filter cloth assembly of the filter-type dust collector according to claim 1 to the ceiling of the dust collector main body,
A method of attaching a retainer / filter cloth assembly by a connecting portion fixed to a clean air outlet opening opened in the ceiling and a fixture having a flange corresponding to the flange of the fastening member.

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