JP2001269525A - Method and apparatus for taking out filter cloth in dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the detachment of used filter cloth in a bag filter. SOLUTION: In a pulse jet type dust collector 1 wherein a housing is divided into a lower dust-containing air chamber 4 and an upper clean air chamber 5 with a thimble plate 3 and a large number of filter cloths 10 are suspended from the thimble plate 3 and dust-containing air introduced into the dust- containing air chamber 4 is filtered with the filter cloths 10 to be discharged through the clean air chamber 5, when the used filter cloth 10 is detached, at first, a cage 11 for expanding and holding the filter cloth 10 is pulled out and, subsequently, the filter cloth 10 is raised while turned inside out in such a state that the upper end of the filter cloth 10 is attached to the thimble plate 3 and the leading end of the filter cloth 10 is detached from the thimble plate 3 to feed out the filter cloth 10 to a proper place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing used filter cloth from a dust collector.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show an outline of the above dust collector. The dust collector 1 includes a thimble plate 3 inside a housing 2.
The upper and lower parts are divided into dust-containing air chambers 4 and the upper part is a purified air chamber 5. The air is filtered by a cloth 10 and exhausted through a purifying air chamber 5.
It is designed to be discharged to the outside by each filter cloth,
As shown in FIG. 6, a cage 11 for expanding and holding this is inserted, and a pulse jet ejection pipe having an ejection port formed opposite to each filter cloth 10 in order to remove dust and the like adhering to each filter cloth 10 due to reverse airflow. 12 and nozzle 13 attached to each filter cloth
And Each ejection pipe 12 is connected via a switching valve 15 from a pressure air supply pipe 14, and is configured to eject pressure air into the filter cloth at predetermined intervals by opening and closing the valves. Reference numeral 16 denotes a snap ring for attaching the filter cloth 10 to an attachment ring 17 provided on the thimble plate 3;
Indicates a bolt for adjusting the attachment of the cage 11 to the thimble plate 3.

When removing the used filter cloth due to clogging of the filter cloth or the like, first, the cage 11 is pulled out upward with a chain block or the like, and then the snap ring 16 is removed from the mounting ring 17 to remove the filter cloth from dust-containing air. Drop into the room 4. Thereafter, a method is adopted in which the operator enters a dust-containing air chamber through a manhole (not shown) and takes out the filter cloth.

[0004]

However, dust floats in the dust-containing air chamber, and when the filter cloth is carried out, dust adhering to the filter cloth is scattered. Some contain harmful substances such as dioxins and heavy metals. Therefore, unloading the filter cloth is a task in such a poor environment, and there has been a strong demand for improvement of the filter cloth. In view of the foregoing, the present invention takes out the filter cloth from the purification air chamber, and further prevents dust adhering to the filter cloth from scattering as much as possible, without contaminating the vicinity and improving the work efficiency. The purpose is to measure.

[0005]

According to a first aspect of the present invention, there is provided a method, wherein the inside of a housing is vertically divided by a thimble plate, a lower portion includes a dust-containing air chamber, and an upper portion includes a purified air chamber. A lot of filter cloths are hung on a thimble plate, the dust-containing air introduced into the dust-containing air chamber is filtered by the filter cloth, and the used filter cloth is discharged in the dust collector discharged through the purification air chamber. To remove the filter cloth, first remove the cage that holds the filter cloth, hold the upper end of the filter cloth to the thimble plate, pull it upside down with the inner surface of the filter cloth as the outer surface, and then remove the tip of the filter cloth from the thimble plate. And transported to the right place.

In the method for removing a filter cloth according to the present invention, the cage for expanding and holding the filter cloth is extracted, and then the upper end of the filter cloth is attached to a thimble plate. The dust is attached to the filter cloth on the inside, and the dust is not scattered. Therefore, even if the filter cloth is taken out from above, the vicinity is not contaminated.

A second invention relates to an apparatus for carrying out the above method, wherein in the dust collecting apparatus, a cage for expanding and holding the filter cloth is inserted into the extracted filter cloth, and the inside of the filter cloth is turned inside out. An internal / external reversing pulling mechanism for pulling up to a state is provided.

In the present invention having the above-described structure, after the cage is extracted, the inside / outside inverting pulling mechanism is inserted into the filter cloth, and the filter cloth is pulled up by the pulling mechanism so that the filter cloth is turned upside down with the inner surface as the outer surface. As a result, the inner surface of the filter cloth to which dust does not adhere becomes the outer surface, and the filter cloth can be pulled up without contaminating the vicinity.

In a third aspect of the present invention, the inside / outside reversing pulling mechanism includes a plurality of rollers provided to face an inner surface of the filter cloth, and a pressing mechanism for moving each roller forward and backward with respect to the inner surface of the filter cloth. 3. The apparatus according to claim 2, wherein the roller presses the roller against the inner surface of the filter cloth by the pressure mechanism, and sequentially rotates the filter cloth upward by rotating the roller.

According to the present invention having the above-described structure, there are provided a plurality of rollers provided as opposed to the inner surface of the filter cloth as a filter cloth inversion pulling-up mechanism, and a pressing mechanism for moving each roller forward and backward with respect to the filter cloth inner surface. By pressing the roller against the inner surface of the filter cloth and sequentially pushing the filter cloth upward by rotation, the inside and outside of the filter cloth can be inverted and easily pulled up.

According to a fourth aspect of the present invention, the inside-outside reversing pull-up mechanism is provided with a plurality of scraping mechanisms provided to face the inner surface of the filter cloth, and a pressing mechanism for moving the scraper mechanism forward and backward with respect to the inner surface of the filter cloth. , And each of the scraping-up mechanisms lifts and lowers the filter cloth with respect to the filter cloth.

According to the present invention having the above-described structure, there are provided a plurality of scraping mechanisms disposed as opposed to the inner surface of the filter cloth as the inside and outside reversing pulling mechanism, and a pressing mechanism for moving the scraping mechanism forward and backward with respect to the inner surface of the filter cloth. Each scraping mechanism raises and lowers the filter cloth by raising and lowering, so that the filter cloth can be sequentially raised and turned inside out.

According to a fifth aspect of the present invention, the scraping mechanism according to the fourth aspect of the present invention comprises a brush-like hook member in which a large number of obliquely upward flexible wires are implanted. When the lifting is released and the filter cloth is engaged, it is engaged with the filter cloth, and the pair of scraping mechanisms alternately moves up and down. It is characterized by doing.

According to the present invention having the above-described structure, a plurality of obliquely upward flexible wires are implanted as brushing-up mechanisms and are constituted by brush-like hooking members, and one of the pair of brush-like hooking members is formed. When the brush-like hooking member scrapes up the filter cloth, the other brush-like hooking member performs a descending elevating movement, whereby the filter cloth can be sequentially scraped up and turned inside out.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. FIGS. 1 to 3 show a first embodiment. In taking out a filter cloth in a dust collecting apparatus 1, FIGS.
First, the cage (see FIG. 6) for expanding and holding the filter cloth is pulled up in the same manner as in the conventional example, and then the filter cloth take-out device 20 is moved to the filter cloth 10.
And placed on the thimble plate 3. The take-out device 20 includes a cylindrical body 2 for storing a filter cloth to be lifted.
1 and an internal / external reversal pulling mechanism 22 housed in the cylinder as a filter cloth pulling means. The inside / outside inversion pulling (including push-up) mechanism 22 includes a push-up member 23 provided facing the inner surface of the filter cloth 10, that is, a plurality of (two in the illustrated example, two rollers 23 a arranged at symmetrical positions),
23b and a pressure mechanism 24 for moving each roller forward and backward with respect to the inner surface of the filter cloth. The rollers 23a and 23b are rotatably supported by the mounting frames 25a and 25b, respectively, and include worm wheels that mesh with the worms 26a and 26b. The worms 26a, 26b are connected to a drive unit 28 mounted on the upper part of the cylinder 21 via flexible drive shafts 27a, 27b, respectively, and the rollers 23a, 23b pull up the filter cloth 10 by driving the motor M. Rotated in the direction.

The pressing mechanism 24 includes the mounting frame 25a,
A supporting shaft 30 for supporting 25b via lower levers 31a and 31b, and a lifting cylinder 33 for mounting the mounting frames 25a and 25b similarly via upper levers 32a and 32b are provided. The lifting cylinder 33 is raised and lowered by a cylinder 34. You.

In the above configuration, when removing the filter cloth 10, first, the cage 11 for expanding and holding the filter cloth is pulled up together with the nozzle 13 and removed. Next, as shown in FIG. 2, the lifting cylinder 33 is pulled up by the cylinder 34, so that the mounting frame 25a is moved through the upper levers 32a and 32b.
25b is moved to the contracted position (the position in FIG. 2), that is, the position where the rollers 23a and 23b are separated from the filter cloth 10, and the filter cloth 1 is moved.
It is set at a location facing 0 (FIG. 2). At this time, preferably, the rollers 23a and 23b are arranged so that the contact point of the filter cloth 10 is located slightly below the snap ring 16.

Next, by lowering the elevating cylinder 33, the mounting frames 25a and 25b are pushed outward,
a and 23b are pressed against the filter cloth 10 (the state of FIG. 1). In this state, each roller rotates in the pulling direction with respect to the filter cloth. As a result, the filter cloth 10 is pulled up with the back side as the outer side as shown in FIG. 3a. At this time, the rollers 23a, 23
By arranging b at a position below the snap ring 16, the filter cloth 10 can be prevented from expanding, and the roller can be effectively scraped up.

Next, as shown in FIG. 3b, after the entirety of the filter cloth has been pulled up, the snap ring 16 for attaching the upper end of the filter cloth to the attachment ring 17 of the thimble plate 3 is removed, and the cylindrical body 21 is appropriately mounted, for example, a chain block. , And if necessary, a bag or the like is attached to the lower part and carried out to a predetermined discharge place. At this time, the filter cloth 10 has rollers 23a and 23b.
It is not dropped because it is held by. After being transported to a predetermined place, the pressure mechanism 24 is operated, and each roller 23a,
23b is moved to the contracted position. As a result, the filter cloth 10 is dropped and discharged by its own weight.

Although the above embodiment shows an example in which two rollers are used, three or more rollers may be arranged symmetrically.

Next, a second embodiment shown in FIG. 4 will be described. The filter cloth take-out device 40 in the dust collector of this embodiment is provided with the rollers 23a and 23b of the inside / outside reversing mechanism 22.
The filter cloth 10 is lifted up and down to lift up the filter cloth 10, and the lifting mechanism 41 uses a locking member that engages with the filter cloth only when ascending and moves freely when descending. The figure shows an example in which brush-like hooking members 42a and 42b (hereinafter collectively referred to simply as 42) in which a large number of obliquely upward flexible wires are implanted are used. Each hooking member 42a, 42b is provided with a lift 43a, 43
b so as to be able to move up and down.

The lifts 43a, 43b are supported by the pressure transition 24. That is, each lift is supported by lower levers 31a, 31b and upper support members 32a, 32b, and lifts 43a, 4
The hooking members 42a, 42b are advanced and retracted with respect to the filter cloth via 3b.

The hook members 42a, 42b are respectively connected to drive cylinders 45a, 45b via drive shafts 44a, 44b.
b and each cylinder is actuated to alternately raise and lower in an associated manner. That is, as shown in the figure, the filter cloth 10 is repeatedly raised and lowered alternately, whereby the filter cloth 10 is sequentially pulled up with the inner surface of the filter cloth as the outer surface. Other structures are the same as those of the previous example, and the same components are denoted by the same reference numerals and description thereof will be omitted. In this case, the number of the hooking members is not limited to two, but may be three or more symmetrically.

[0024]

As described above, according to the present invention, when removing the used filter cloth, first, a cage for expanding and holding the filter cloth is extracted, and then the upper end of the filter cloth is attached to the thimble plate. Since the inner surface is turned upside down with the outer surface, the dust adhesion surface of the filter cloth is on the inside, so that the dust does not scatter and contaminate the surroundings. No work is required, and the work can be easily taken out in the purified air chamber. At this time, as an inside / outside reversing means for turning the filter cloth over, a plurality of rollers provided opposite to the inner surface of the filter cloth, and a pressure mechanism for moving each roller forward and backward with respect to the inner surface of the filter cloth, When the filter cloth is pressed against the inner surface of the filter cloth and the filter cloth is sequentially pushed upward by rotation, the filter cloth can be easily pulled up even with a long filter cloth. Further, as the inward / outside inversion pulling-up mechanism, a brush-like hooking member in which a number of obliquely upward flexible wires are implanted may be constituted, and a plurality of the hook-and-loop members may be symmetrically and alternately drawn up by a writing motion. Can be simple in configuration.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an operation procedure of a filter cloth take-out device in a dust collector of the present invention.

FIG. 2 is an explanatory diagram of a state where the roller has shifted to a contracted position of a roller in FIG. 1;

FIGS. 3 (a) and 3 (b) are illustrations of a procedure for reversing a filter cloth by an inside / outside reversing roller.

FIG. 4 is an explanatory view of a filter cloth take-out device in a dust collector according to a second embodiment of the present invention.

FIG. 5 is an overall explanatory view of the dust collecting apparatus.

FIG. 6 is an explanatory view showing how to attach a filter cloth to a thimble plate.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dust collector 3 thimble plate 4 dust-containing air chamber 5 purified air chamber 10 filter cloth 11 cage 20 take-out device for filter cloth in dust collector 22 internal / external reversal pulling mechanism 23 push-up member 24 pressurizing mechanism 40 filter cloth in dust collector Take-out device 41 Raising mechanism 42 Hook stopper

Claims (5)

[Claims] 1. The inside of a housing is divided into upper and lower parts by a thimble plate, a lower part is a dust-containing air chamber, and an upper part is a purification air chamber. In a pulse jet type dust collector in which dust air is filtered by a filter cloth and discharged through a purified air chamber, when removing a used filter cloth, first remove a cage for expanding and holding the filter cloth, and then remove the filter cloth. The upper end of the filter cloth is attached to the thimble plate, and the filter cloth is pulled upside down with the inner surface of the filter cloth as the outer surface. Then, the filter cloth tip is removed from the thimble plate and taken out to an appropriate place. Method. 2. The inside of the housing is divided into upper and lower parts by a thimble plate, a lower part is a dust-containing air chamber, and an upper part is a purification air chamber. In a dust collector, in which dust air is filtered by a filter cloth and discharged through a purified air chamber, a cage for expanding and holding the filter cloth is inserted into the extracted filter cloth, and the inside of the filter cloth is turned upside down. An apparatus for taking out a filter cloth in a dust collector, comprising an inside / outside inverting pulling mechanism for pulling up the filter cloth. 3. The internal / external reversing pull-up mechanism includes a push-up member composed of a plurality of rollers provided to face the inner surface of the filter cloth, and a pressing mechanism for moving each roller forward and backward with respect to the inner surface of the filter cloth. 3. The apparatus according to claim 2, wherein the roller is pressed against the inner surface of the filter cloth by a pressure mechanism, and the filter cloth is sequentially pushed upward by rotation of the roller. 4. The inside / outside reversing pulling mechanism includes a plurality of scraping mechanisms provided opposite to the inner surface of the filter cloth, and a pressing mechanism for moving the scraping mechanism forward and backward with respect to the inner surface of the filter cloth. 3. The apparatus according to claim 2, wherein the mechanism lifts and lowers the filter cloth by raising and lowering the filter cloth. 5. A scraping mechanism comprising a brush-like hook member having a large number of obliquely upward flexible wires implanted therein, the engagement with the filter cloth being released at the time of lowering, and the filter cloth being lifted at the time of raising. Engage,
5. The filter according to claim 4, wherein the pair of scraping mechanisms alternately move up and down, and when one of the scraping mechanisms scrapes the filter cloth, the other scraping mechanism descends. Cloth removal device.