JP3655174B2 - Dust collector for dust collector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust collector that sucks a dust-containing air flow and filters it with a filter. Specifically, the dust collector can remove dust attached to the filter by removing it with pulse air for backwashing. It relates to the device.
[0002]
[Prior art]
With regard to dust collectors for dust collectors, conventionally, as seen in, for example, Japanese Patent Application Laid-Open No. 56-89816, compressed air is blown into the inside of a filter disposed below each nozzle of a blow tube. Thus, a so-called pulse jet type filter dust removing device configured to remove dust attached to the outer surface of the filter to remove dust is widely adopted.
[0003]
However, the dust removing device having the above-described structure is configured by arranging a plurality of blow tubes side by side and arranging a filter in a state of being vertically spaced from each nozzle of each of these blow tubes, for example, like a grid pattern. Therefore, if it is necessary to increase the total area of the filter in order to increase the dust collection capacity of the dust collector, increase the number of blow tubes or increase the number of filters by increasing the nozzle spacing. Doing so will increase the number of devices such as solenoid valves that are connected to the blow tube at the same time. This will not only increase the cost, but also increase the space, especially in the height direction of the dust collector. However, there is a problem that a corresponding space is required.
[0004]
On the other hand, the filter dust removing device described in JP-A-60-815 divides the filtration gas chamber into a plurality of rooms without using a blow tube, and is provided in each of these divided rooms. By injecting compressed air from each gas outlet passage, the compressed air is blown into each filter communicating with each room, and dust adhering to the filter is backwashed and removed. It has no blow tube and has excellent features in terms of cost and space.
[0005]
[Problems to be solved by the invention]
However, the above-mentioned filter dust removal device has a configuration in which the dust balance of the dust removal air to each filter is not constant, and for example, backwashing air may not be sufficiently jetted to the inlet side filter and the intermediate filter. Therefore, in order to send sufficient air for backwashing to all the filters, a large amount of backwashing air must be supplied as a whole. As a result, there is a problem that the cost is increased due to the increase in cost and complexity, and even if the backwash air is sufficiently supplied to all the filters, the supply is still unbalanced. There remains a problem in that the dust removal for each filter varies.
[0006]
Therefore, the technical problem of the present invention is that even if the number of filters is increased in order to increase the dust collection capacity of the dust collector, dust removal for each filter is efficiently performed with a relatively simple structure and a small device. Another object of the present invention is to provide a dust collector for a dust collector devised so that dust can be uniformly removed by blowing compressed air for dust removal into each filter in a well-balanced manner.
[0007]
[Means for Solving the Problems]
(1) In order to solve the above technical problem, in the present invention, as described in claim 1, a plurality of dust-containing airflows sucked into the dust chamber by the suction action of the blower are suspended in the dust chamber. In the dust collector configured to exhaust the clean air through a clean chamber provided in the upper part of the dust chamber, after filtering through the filter, the top plate portion in the clean chamber and the top plate of the clean chamber A plurality of projections having a relatively large area are drawn upward, and a roof plate plate having a plurality of injection holes formed on the inner bottom surface of the top plate is attached in close contact with each other. A blow box with a flat space between the roof plate and the roof plate is provided, and the dust removal pressure supplied from the header tank through the diaphragm valve from the supply port provided on the upper surface of the blow box. The compressed air is configured to be freely supplied, and a plurality of injection holes are provided on the bottom surface of the blow box so that the supplied compressed air can be blown toward the upper end ports of the filters.
[0008]
(2) In the present invention, as described in claim 2 of the prior art, a plurality of filters are divided into a plurality of sets, and a plurality of blow boxes are provided in the clean room for each of the divided filter sets. Each of these blow boxes is configured to be able to supply compressed air for dust removal from the header tank through the diaphragm valve, and the compressed air supplied to the bottom of each blow box is connected to the upper end of each filter. It is comprised so that the several injection hole which injects toward may be provided.
[0009]
(3) Further, in the present invention, as described in the third aspect, the clean chamber is configured as a roof that can be opened and closed with respect to the dust chamber, and a suction duct pipe on which one side of the roof has a blower suction action. And a blow box having a flat space on the ceiling of the roof.
[0010]
(4) Further, in the present invention, as described in claim 4, an exhaust chamber having a suction blower is connected to an upper part of a clean chamber provided with a blow box inside, and the suction action of the suction blower is provided. Therefore, the clean air filtered through the filter is discharged to the outside through the clean chamber and the exhaust chamber.
[0011]
( 5 ) Further, in the present invention, as described in the fifth aspect of the present invention, a supply port for dust removal compressed air supplied from the header tank through the diaphragm valve is provided on the upper surface portion of the substantially central portion of each blow box, Each injection hole drilled in the bottom surface of the box is provided near the inner wall surface of the blow box at an intermediate position connecting the inner wall surface and the supply port, and a part of the inner wall surface has a substantially semicircular cross section. The injection hole is formed at a position surrounded by the inner wall surface.
[0012]
According to the means described in the above (1), the compressed air for dust removal supplied from the header tank through the diaphragm valve is once sent into a narrow and flat blowbox for compression, and then each of the holes formed on the bottom surface is compressed. Blow tubes are blown toward the upper end of each filter located below the injection hole and backwashed, so there is no need to provide a blow tube for each filter. Therefore, the number of pipes is greatly reduced and the entire system is simplified. In addition, the space can be reduced, and compressed air can be uniformly blown into all the filters, so that the dust removal of the filters can be performed in a balanced and efficient manner.
[0013]
Further, according to the means described in the above (1), the flat blow box for dust removal is installed inside the dust collector (specifically, the clean room only by attaching the roof plate in close contact with the inner bottom surface of the top plate of the clean room. Therefore, it is possible to provide a dust removing device that is reduced in cost and space.
[0014]
According to the means described in (2) above, it is not necessary to provide a blow tube for each filter, and each filter is arranged in groups for several blow boxes, and dust removal is performed in each blow box. By supplying compressed air, each filter can be back-washed in groups to remove dust, so even if the dust collector has increased dust collection capacity by increasing the number of filters, the entire dust removal device is compared. It is possible to reduce the cost and size of the entire dust collector.
[0015]
According to the means described in the above (3), since the suction dust tube which the suction action of the blow box and the blower is provided in the clean room configured to be openable and closable with respect to the dust chamber, Various maintenances on the suction dust tube or the filter can be easily performed by opening the cleaning chamber.
[0016]
According to the means described in the above (4), the dust removing apparatus according to the present invention can be applied to both a dust collector of a type in which a blower is separated and a dust collector of a type in which a blower is mounted inside. To do.
[0017]
According to the means described in ( 5 ) above, the compressed air for dust removal supplied into the flat blow box is sequentially blown from the respective injection holes toward the upper end of each filter to backwash the filter. However, the compressed air supplied into the blow box is directly directed to the injection hole and the one that reflects the inner wall surface of the blow box and changes the direction of travel, and is directed to the injection hole. Since this is injected toward the upper end of the filter, the compressed air supplied into the blow box is efficiently blown into each filter from each injection hole in a well-balanced manner. And a part of the inner wall surface of the blow box is formed in a substantially semicircular cross section so as to surround the injection hole. The inner wall surface is reflected intensively toward the injection hole, more effectively to allow blowing each filter compressed air.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiment of the dust collector for a dust collector according to the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an example of the dust collector according to the present invention, FIG. 2 is a plan view thereof, and FIG. Similarly, FIG. 4 is an enlarged cross-sectional view illustrating the internal structure of the dust collector. In these drawings, the reference numeral 1 indicates the main body of the dust collector, 1H denotes its internal dust chamber, 2 Is a hopper continuously provided below the dust chamber 1H, 2A is a dust discharge cylinder connected to the lower end of the hopper 2, 3 is a discharge valve, and 1T is a stand that supports the entire body 1.
[0019]
4 is a clean chamber attached as an openable / closable roof using a hinge 5 on the upper portion of the dust chamber 1H, 6 is a bolt for tightening and fixing the clean chamber 4 with the upper end of the dust chamber 1H closed. 4T is a cover plate that covers the peripheral edge of the upper end of the dust chamber 1H from above when the clean chamber 4 is closed, and 13 is a partition plate that closes the upper end of the dust chamber 1H. The partition plate 13 cleans the dust chamber 1H. It has a structure in which the chamber 4 is partitioned.
[0020]
FIG. 5 is a plan view of the partition plate 13, and FIG. 6 is a cross-sectional view taken along the line AA of FIG. 5. The filter mounting plate 13T provided at the center of the partition plate 13 is provided with its inlet. A large number of venturis 13A are arranged side by side while being open toward the clean room 4, and each of these venturis 13A is suspended by a filter 12 with its upper end 12A fitted from below. The lower end 12B of each filter 12 is closed by the bottom plate 14, and the airtightness when the clean chamber 4 is closed to the dust chamber 1H side in the upper and lower fitting grooves 16A on the outer peripheral edge of the partition plate 13. In order to increase the height, packings 15A and 15B (FIG. 6) are attached.
[0021]
Next, 4X, 4Y and 4Z are blow boxes provided on the top plate portion of the inside 4H of the clean chamber 4. These blow boxes 4X, 4Y and 4Z having a flat space as a whole are shown in FIG. As is clear from the description of the side view of FIG. 7 in which the portion is enlarged and the plan view shown in FIG. 8, a convex portion having a relatively large area is drawn and formed on the top plate of the cleaning chamber 4 by a press or the like, and The disk-shaped roof plate plate 4 'shown in FIGS. 9 and 10 is attached to the inner bottom surface of the top plate in a close contact state, so that it can be made extremely thin as shown. A supply port 9A of a nozzle structure for press-fitting compressed air for dust removal is provided on the upper surface of the substantially central portion of the blow boxes 4X, 4Y, 4Z.
[0022]
Further, the roof plate plate 4 'constituting the bottom surface of each of the blow boxes 4X, 4Y, 4Z is in a state of being aligned with the upper end opening of each of the filters 12 located on the lower side, that is, the venturi 13A. A plurality of injection holes 4 ″ are formed so that compressed dust-removing air press-fitted into the blow boxes 4X, 4Y, 4Z can be blown toward the respective venturis 13A.
[0023]
The plane shape of each of the blow boxes 4X, 4Y, and 4Z is as shown in FIG. 8 in which compressed air that is press-fitted from the supply ports 9A provided in the substantially central portion is evenly distributed. In order to supply to "...", in particular, the outer peripheral edge is formed into a special corrugated shape in which arc-shaped side walls surrounding each injection hole 4 "... are continuous, and the blow box 4Z in the center is provided in the center 3 It is formed in a special shape in which a substantially triangular head shape surrounding the injection holes 4 ″ is connected.
[0024]
Also, in any of the blow boxes 4X, 4Y, 4Z formed in this way, each injection hole 4 ″ is close to the inner wall surface of each box, and an intermediate between these inner wall surfaces and the supply port 9A in the central portion. As shown in the figure, a part of the inner wall surface is formed into a wave shape having a continuous semi-circular arc shape as shown in the figure, and the injection holes 4 ″ are provided at positions surrounded by these semi-circular inner wall surfaces. As a result, the compressed air press-fitted into each blow box 4X, 4Y, 4Z from each supply port 9A is easy to enter each injection hole 4 ″ after being reflected on each inner wall surface, and directly into the injection holes 4 ″. By adding this reflected compressed air to the dust-removed compressed air that enters and is sprayed toward each filter 12, the amount of dust-removed compressed air is increased so that the filter 12 can be backwashed effectively. doing.
[0025]
Further, in the figure, 1A is a suction port for dust-containing airflow provided on one side of the dust chamber 1H, 4A is a suction duct tube connected to a suction blower (not shown) connected to one side of the clean chamber 4, and 9A. ... Are diaphragm valves attached to the supply ports 9A, 7 is a compressed air supply unit, 8 is a header tank, 8A is a compressed air supply connecting the header tank 8 and each diaphragm valve 9. Pipes 10 are boxes containing pilot valves (not shown). When the filters 12 are backwashed to remove dust adhering to the outer surface, the diaphragm valves 9 are opened and sent from the header tank 8. Incoming compressed air is press-fitted into each blow box 4X, 4Y, 4Z, and this compressed air is injected into the upper end of each filter 12 located below each injection hole 4 ″, that is, a venturi. And injected toward the 3A, it has a mechanism to drop pay by backwashing the dust adhering by blowing each filter 12 in it.
[0026]
In FIG. 3, reference numeral 11 denotes a diffusion tube having a lower end portion connected to the dust chamber 1H described above, and an upper lid 11A is attached to the upper end opening thereof so as to be freely opened and closed.
[0027]
11 shows a dust collector of a type in which a suction blower BR is incorporated in the main body 1. In the figure, 1X is constructed so that the above-described flat blow box 4K is suspended in the middle portion. The cleaning chamber 1Z is the head of the main body 1 connected to the upper side of the cleaning chamber 1X, and the blower BR is attached to the exhaust chamber 1Y in the head 1Z having an exhaust port 1F on one side. ing.
[0028]
Since the dust collector for dust collector according to the present invention is configured as described above, the dust adhering to the outer surface of each filter 12 ... is press-fitted into the blow boxes 4X, 4Y, 4Z having flat narrow spaces. Compressed air for dust removal is jetted toward the venturi 13A of each filter 12 ... more vigorously than each injection hole 4 "... and blown into the inside. Therefore, dust is removed from the outer surface of the filter 12 ... by backwashing action. Then, it is wiped off toward the lower hopper 2.
[0029]
Further, since the compressed air that has been press-fitted into each of the blow boxes 4X, 4Y, 4Z is jetted evenly toward the respective filters 12 ... from the respective jet holes 4 "..., all the filters 12 ... are well balanced. , Efficient dust removal.
[0030]
【The invention's effect】
As described above, according to the dust collector for a dust collector according to the present invention, it is not necessary to provide a blow tube or an on-off valve for each filter, so even if the number of filters is increased to increase the dust collection capacity, At the same time, the dust removal device is not proportionally complicated, and the dust removal blow box can be easily built inside the dust collector. The advantage of simplifying, cost saving and space saving can be demonstrated, and it is a revolutionary thing as a dust removing device for a dust collector.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a dust collector equipped with a dust removing apparatus according to the present invention.
FIG. 2 is also a plan view.
FIG. 3 is a front view of the same.
FIG. 4 is an enlarged cross-sectional view illustrating the internal structure of the dust collector.
FIG. 5 is a plan view of a partition plate in which a filter is suspended.
6 is a cross-sectional view taken along line AA in FIG.
FIG. 7 is a front view illustrating a main part of the present invention.
FIG. 8 is also a plan view.
FIG. 9 is a plan view of a roof plate plate constituting the blow box.
FIG. 10 is a cross-sectional view of a roof plate plate.
FIG. 11 is a configuration diagram illustrating the configuration of another embodiment of the present invention in which a suction blower is mounted.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dust collector main body 1H Dust chamber 4 Clean room 4X, 4Y, 4Z, 4K Blow box 4A Suction duct pipe 4 'Roof plate plate 4 "Injection hole 8 Header tank 9 Diaphragm valve 9A Compressed air supply port 12 Filter 13 Partition plate 13A Venturi

Claims (5)

Constructed to filter the dust-containing airflow sucked into the dust chamber by the suction action of the blower through multiple filters suspended in the dust chamber, and then exhaust the clean air through the clean chamber at the top of the dust chamber In the dust collector
A plurality of convex portions having a relatively large area are formed on the top plate portion of the clean chamber in the upward direction on the top plate of the clean chamber, and a plurality of injection holes are formed on the inner bottom surface of the top plate. By attaching the roof plate plate in close contact with each other, a blow box having a flat space between the convex portions and the roof plate plate is provided. Inside the blow box, a supply port provided on the upper surface side is provided. A plurality of dust-compressed compressed air supplied from a header tank through a diaphragm valve can be freely supplied, and the supplied compressed air can be blown into the bottom surface of the blow box toward the upper end of each filter. A dust collector for a dust collector, characterized in that an injection hole is provided.   While the multiple filters are divided into multiple groups, a plurality of blow boxes are provided in the clean room for each of these divided filter groups, and each of these blow boxes is used for dust removal through a diaphragm valve from the header tank. And a plurality of injection holes for blowing the supplied compressed air toward the upper end of each of the divided filters. Item 1. A dust collector for a dust collector according to Item 1.   The clean chamber is configured as a roof that can be opened and closed with respect to the dust chamber, and a suction duct tube that allows the blower to suck is connected to one side of the roof, and the roof has a flat space. The dust collector for a dust collector according to claim 1 or 2, further comprising a blow box.   An exhaust chamber equipped with a suction blower is connected to the upper part of the clean chamber provided with a blow box inside, and the clean air filtered through the filter by the suction action of the suction blower is supplied to the clean chamber and the exhaust chamber. 3. The dust collector for a dust collector according to claim 1, wherein the dust collector is configured to be discharged outside through the dust collector. Provided with a supply port for dust removal compressed air supplied from the header tank through the diaphragm valve on the upper surface of the substantially central portion of each blow box, and each injection hole drilled on the bottom surface of the blow box has an inner wall surface of the blow box. Are provided at intermediate positions connecting the inner wall surface and the supply port, respectively, while a part of the inner wall surface is formed in a substantially semicircular cross section, and the injection hole is located at a position surrounded by the inner wall surface. 5. A dust collector for a dust collector according to claim 1, 2, 3 or 4, wherein said dust collector is formed.

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