JP3634212B2 - Filter device for dust collector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a filter device that uses a molded filter having a substantially star-shaped cross section as a filter used in a dust collector.
[0002]
[Prior art]
As for a filter device using a filter having a substantially star-shaped cross section in which peaks and valleys are alternately continued as a filter for a dust collector, for example, as described in Japanese Utility Model Publication No. 4-6811, molding of an inner and outer double structure is performed. There is a filter device that uses a filter, and even when attached to a device that removes dust adhering to a molded filter, a pulse jet type dust removal device that jets out compressed dust by jetting compressed air described in the above publication As described in Japanese Patent Application Laid-Open No. 10-296030, there is a vibration type dust removing device that vibrates and dusts by scratching a surface side crest portion of a molding filter.
[0003]
[Problems to be solved by the invention]
Since the filter device described in the first publication (Execution No. 4-6811) is configured with a molded filter inside and outside double, a large filtration area can be obtained for a small overall construction, It has the advantage of collecting a relatively large amount of dust, but on the other hand, the air that has been sucked in because the inner molded filter is provided in parallel and close to the inside of the outer molded filter. However, since it rises through the narrow space (interval) of these inside and outside forming filters, there is a problem that the air pressure loss increases and the load applied to the suction blower increases.
[0004]
In addition, since the dust removing device described in the first publication has a structure in which compressed air is blown into the filter through the bench, there is a problem that the entire filter becomes longer and the size of the device cannot be reduced. Furthermore, since the compressed air injected through the venturi is reflected by the upper surface of the inner molding filter, it is difficult for the compressed air to enter the narrow space where the inner and outer molding filters overlap. Compressed air must be injected sufficiently, and as a result, the suction force during dust collection and the compression force during dust removal are repeatedly applied to the inner and outer molded filters, resulting in faster fatigue damage. There was also.
[0005]
Next, the vibration type dust remover described in the second publication (Japanese Patent Application Laid-Open No. 10-296030) has a structure in which dust is removed by vibrating the crest of the surface of the formed filter with a scraping rod. Since the crest portion, that is, the crease portion is partially scratched to give vibration, the vibration is not directly transmitted to the entire formed filter (particularly the valley portion), and the dust removing ability is low. Therefore, there is a problem that the dust removing action cannot be uniformly applied to the entire formed filter.
[0006]
Therefore, the technical problem of the present invention is that it is possible to make the entire length of the molded filter short for a large filtration area, it is easy to suck and remove dust-containing air, and it is structurally strong and long-lasting. It is easy and easy to manufacture, and it is possible to reliably remove dust adhering to the molding filter by using a relatively simple structure of the dusting means and uniformly to the entire molding filter. It is providing the filter apparatus for dust collectors provided with the dust removal function which can do.
[0007]
[Means for Solving the Problems]
Means taken in the present invention to solve the above technical problems are as follows.
[0008]
A filter device for a dust collector using a molded filter formed into a substantially star cross section as a filter for dust filtration,
[0009]
(1) On the filter base plate having an opening in the center, an outer formed filter made entirely in a cylindrical shape is erected, and the inside of the outer formed filter is formed shorter than the outer formed filter, and The inner molded filter, which has a cylindrical shape with an overall taper, with the bottom side thicker so that it is close to the outer molded filter and the upper side is gradually separated from the outer molded filter, is also spaced on the filter base plate. On the other hand, the outer holding part for attaching the upper end part of the outer molding filter and the upper end part of the inner molding filter are mounted on the step plate for holding the upper end part of the inner and outer double forming filter. The inner holding part to be attached is formed with a step so as to be two steps on the upper and lower sides, and each of these holding parts inside and outside is provided with an inner and outer part respectively. Forming inner and outer adhesive grooves for fitting and bonding the upper end of the molded filter, and providing a communication groove for connecting the inner and outer adhesive grooves to the beam member connecting the inner and outer holding parts. (Claim 1)
[0010]
(2) On the bottom side of the filter base plate on which the inner and outer double forming filters are erected, there is provided a blade shaft configured to be rotatable in the circumferential direction. The blade shaft is separated from the blade shaft according to the rotation of the blade shaft. A pair of left and right dust-removing hammer members that can move in a pendulum manner around the shaft and can alternately strike the bottom surface of the filter base plate are attached. (Claim 2 )
[0011]
(3) As a dust removing hammer member, use a plastic material made in a spherical shape. (Claim 3 )
[0012]
According to the means according to claim 1 described in the above (1), a molded filter having a substantially star-shaped cross section is used as a filter, and the molded filter is configured to be double inside and outside. The filter area can be significantly increased compared to a general bag filter without changing the filter, improving the filtration function and reducing the size of the filter, and the inner molded filter has a tapered shape with a thin upper end and a thick lower end. Since it is formed into an opening type that gradually widens as the distance from the outer formed filter goes upward, the air pressure loss is small and the burden on the blower can be reduced, and compressed air is injected from above When removing dust, the inner volume of the outer molded filter can be reduced by the inner molded filter. It is possible to effectively drop the air, and further, compressed air can be blown smoothly and evenly from the interval at which the upper end opening is wide open to the lower end of the inner and outer forming filters. It is possible to uniformly apply a dust removing action to a heavy molded filter.
[0013]
Further, according to the means according to claim 1 described in the above (1), the upper end of the forming filter configured in and out double erected on filter base plate, the holding portion of the step plate is held inside and outside In order to maintain a constant distance, the normal position can be maintained without being biased by wind pressure, and a constant filtering action can be exhibited at all times. Therefore, the purified air filtered through the inner and outer forming filters can be smoothly discharged through the exhaust port.
[0014]
Furthermore, according to the means according to claim 1 described in the above (1), the upper end of the forming filter configured in and out double, inner holding portion of the stepped plate which are provided to have a step and the outer holding portion of the respective In order to hold both molded filters securely, and to bond the upper ends of the inner and outer molded filters, the above step plate is attached to the floor or Put the front and back upside down on a desk, etc., pour the adhesive into the adhesive groove of each holding part, and fit and hold the upper end of the molding filter upside down in this adhesive When pouring the agent, simply pour the adhesive into the higher adhesive groove (in this case, the groove for the inner molded filter), and the lower adhesive groove (in this case, through the communication groove provided in the beam member). For outer molded filter ) For the adhesive flows naturally also makes it possible to simplify the bonding operation.
[0015]
According to the measures according to claim 2 as described above (2), by turning operation of the tapping shaft, hammering (hitting the bottom of the filter base plate erected the inner and outer double molded filter with a hammer member In this case, since the vibration caused by the hammer ring is transmitted in the vertical direction of the molded filter, dust must be surely removed along the folds of the molded filter formed in a substantially star shape in cross section. Compared with the case where the filter is vibrated to the left and right, the dust can be more reliably removed, and the pair of left and right hammer members that move in a pendulum form a hammer ring alternately. Therefore, it is possible to further reliably thing to pay off the dust, the air eject required without as dust collector, also, Baie There is no need of Churee, easily whole, and, be one can build low and below the length, makes it possible to submit a precipitator filter apparatus having an excellent dust removal function.
[0016]
According to the measures according to claim 3 mentioned above (3), as hammer member for dust removal of the molded filter, for using those made to spherical shape using a plastic material, strongly hammering the filter base plate However, it is possible to provide a filter device for a dust collector having a dust removing function that can exhibit a stable dust removing action over a long period of time without damaging the molded filter or damaging the molded filter.
[0017]
As described above, the technical problems described above can be solved by the means (1) to ( 3 ) and the problems of the conventional techniques can be solved.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the filter device for a dust collector according to the present invention will be described below with reference to the drawings. FIG. 1 is a front view illustrating the configuration of the dust collector according to the present invention. The dust collector shown in the figure has a cyclone body 1A in which the entire section is formed in a substantially cylindrical shape, and a hopper portion 1C whose diameter is gradually narrowed at the bottom portion is continuously provided, and the same cross-sectional substantially cylindrical shape as this cyclone body 1A The upper surface of the dust collector 1 is supported by a top leg 1B, the upper surface of which is closed with a top plate 1D, and the entire lid is attached to the upper end of the cyclone main body 1A using a hinge. 2 and 2 are supported at the required height.
[0019]
Next, 3 is a dust-containing air suction port provided in the circumferential tangent direction of the cyclone main body 1A, 4 is a purified air discharge hole provided in the top plate 1D of the upper lid 1B, and 6 is an upper lid 1B for the cyclone main body. A knob 7 that locks in a closed state to 1A is an inner cylinder provided concentrically inside the cyclone body 1A. The inner cylinder 7 having an open bottom is attached to the upper end of the cyclone body 1A. Dust-containing air is sucked from the suction port 3 in a space 7R which is attached to the ring plate 9 'and is annularly formed between the cyclone body 1A and the inner cylinder 7. (Introduced) and has a turning structure.
[0020]
In addition, a large number of small holes are formed in the entire peripheral surface of the inner cylindrical body 7 excluding the vicinity of the suction port 3, and the lower hopper is sucked from the suction port 3 and turned within the interval 7R. Part of the dust-containing air descending toward the part 1C enters the inside of the inner cylindrical body 7 through the small hole during the descent, reducing the amount of dust-containing air going downward and increasing the momentum of swirling. The structure is gradually weakening.
[0021]
8 is a filter device according to the present invention which is concentrically attached to the inside of the inner cylindrical body 7, and this filter device 8 is constructed in an inner / outer double structure in which an inner molded filter 8B is provided inside an outer molded filter 8A. In addition, a step plate 9 and a filter base plate 10 are attached to the upper and lower ends thereof, and the entire filter 8 is an inner cylinder through the hole (not shown) of the mounting ring plate 9 'described above from above the cyclone body 1A. 7 is constructed so that the outer peripheral edge of the upper filter plate 9 is hung on the inner peripheral edge of the attachment ring plate 9 ', that is, it is attached in a suspended state. The detailed structure of the above-described filter device 8 and the plates 9 and 10 will be described later.
[0022]
Reference numeral 9X denotes a ring-shaped pressing plate protruding from the upper surface of the upper step plate 9. The knob 6 and the lock plate 7X are moved from the opened state of the upper lid 1B to the cyclone body 1A as shown in the figure. When the closed state is locked, the pressing portion 11A provided on the bottom surface of the upper lid 1B presses down the pressing plate 9X from above, and the entire filter 8 suspended inside the inner cylindrical body 7 is It is configured to hold and fix.
[0023]
11 and 11M are suction blowers and blower motors attached to the center of the upper lid 1B. When the motor 11M is activated and rotated by a switch operation to drive the blower 11, the suction force is applied to the suction port 3 described above. The dust-containing air is taken into the cyclone main body 1A, and swirled at the interval 7R to separate relatively large dust by the centrifugal force and drop into the lower hopper portion 1C. Air containing dust is introduced into the inner cylinder 7 through the small hole, and then filtered through the above-described filter device 8 to collect fine dust, and from the interval between the two formed filters 8A and 8B. The structure is such that the exhaust hole (described later) of the step plate 9 and the inside of the upper lid 1B are discharged from the discharge hole 4 of the top plate 1D to the outside.
[0024]
Next, 12 is a blade shaft that is rotatably mounted so as to cross the lower inside of the cyclone main body 1A, 12T is a blade lever provided at the outer end portion of the blade shaft 12 protruding outside the cyclone main body 1A, 12R. Is a dust-removing hammer attached to the blade shaft 12 via the arms 12 ', 12'. When the blade shaft 12 is rotated using the blade lever 12T, the hammer 12R made of a spherical plastic material is used. The bottom surface of the filter device 8, specifically, the bottom surface of the filter base plate 10 is struck, and dust adhering to the filter device 8 is blown off to the hopper portion 1 </ b> C side.
[0025]
In the illustrated embodiment, a total of four dust removal hammers 12R are positioned and attached to the blade shaft 12 so that the bottom surface of the filter device 8, that is, the entire bottom surface of the filter base plate 10, can be hammered evenly. The dust removing action can be uniformly applied to the inner and outer molded filters 8B and 8A. However, the number and mounting positions of the dust removing hammers 12R are changed depending on the size of the filter device 8. Of course, it is not limited to the illustrated one.
[0026]
13 is a collection container such as a pail can connected to the lower side of the hopper 1C to collect dust falling on the hopper 1C, and 14 is entirely outside the lower end of the hopper 1C. An operation lever is shown which is formed in a substantially U-shape so as to surround and is pivotally supported using a shaft 14B on a bracket 15 whose tip is attached to the bottom surface of the hopper 1C.
[0027]
Reference numeral 16 denotes an upper lid cover body capable of closing the upper end opening of the collection container 13 from above, and the space between the collection opening opened at the center of the cover body 16 and the lower end opening of the hopper portion 1C is extendable. The upper end of the support plate 16B projecting on both sides of the middle part of the upper lid cover body 16 is hermetically connected by a connecting tube (not shown) made of a flexible material in a substantially bellows shape, and uses a shaft 14A. When the operation lever 14 is pushed down to the state shown in the drawing, the upper lid cover body 16 is moved downward to seal the upper end of the collection container 13. When the collection container 13 is airtightly connected to the hopper portion 1C side and the operation lever 14 is lifted upward, the upper lid cover body 16 is opened to open the upper end of the collection container 13, and the vertical dimension is set. The tip of the thin lid cover body 16 Taking out the collection container 13 from Ketsuen 16A side, and is configured to allow or to reset another collection vessel 13.
[0028]
Next, the specific configuration of the filter device for a dust collector according to the present invention will be described with reference to the drawings. FIG. 2 is a plan view of the filter device 8, and FIG. 3 is a front sectional view thereof. Of the inner and outer molded filters 8B and 8A formed in a substantially star-shaped cross section that is concentrically erected on the upper surface, the inner molded filter 8B is located above and below the outer molded filter 8A. The length is slightly shorter, the bottom side diameter is thicker so as to be close to the inner wall of the bottom of the outer molded filter 8A, and the upper side diameter is tapered so as to gradually move away from the inner wall of the outer molded filter 8A. It is formed in a cylindrical shape.
[0029]
Further, 8X is an interval (space) between the forming filters 8B and 8A configured as inner and outer doubles, and this interval 8X has a shape in which the upper end is wide according to the taper shape of the inner forming filter 8B and gradually becomes narrower toward the lower end. In addition, after being filtered through the inside 8H of the inner molded filter 8B and the outside of the outer molded filter 8A by the suction action of the blower 11, the air sucked and discharged to the upper side through this interval 8X. It has a structure that can reduce pressure loss.
[0030]
Further, the structure of the plastic step plate 9 that holds the upper ends of the inner and outer double formed filters 8B and 8A will be described with reference to FIGS. 3 and 4 to 6. FIG. 5 is an enlarged plan view, FIG. 5 is a cross-sectional view taken along line YY of FIG. 4, and FIG. 6 is a state in which the front and back of the step plate 9 are inverted, that is, the inner and outer molded filters 8B and 8A. It is the perspective view which showed the state at the time of actually hold | maintaining adhesion, In these drawings, 9A is the upper plate formed in the ring shape (donut plate shape), 9B is the lower plate formed in the circular shape, 9C Is a plurality of ribs for holding the upper and lower plates 9A, 9B with a step difference between the upper and lower plates, 9C 'is an inner end portion thereof, 9D is a step between the steps of the upper and lower plates 9A, 9B. Shows the outlet of filtered air formed
[0031]
Reference numeral 9E denotes an outer holding portion for holding the upper end portion of the outer molded filter 8A provided downward in the upper plate 9A and in the form of a ring, and 9E ′ is an adhesive groove formed on the inner side, 9F Is an inner holding portion for holding the upper end portion of the inner molded filter 8B provided downward in the lower plate 9B and in the form of a ring, and 9F 'indicates an adhesive groove formed on the inner side.
[0032]
Further, in the drawing, 9K... Is a rib that reinforces the pressing plate 9X projecting from the upper surface of the upper plate 9A, and 9V is a beam member laid between the upper plate 9A and the lower plate 9B. .. Are formed on the bottom surface of each of the above-mentioned outer and inner holding portions 9E, 9F, and are connected to the grooves 9E 'and 9F', and the lower adhesive of each of the communication grooves 9Y. A dam 9Z for adjusting the flow rate of the adhesive is provided at the edge portion facing the groove 9F ′.
[0033]
In order to actually hold the upper ends of the inner and outer forming filters 8B and 8A by using the step plate 9 configured as described above, first, the entire step plate 9 is turned upside down as shown in FIG. When the adhesive is put into the inner adhesive groove 9F '(located on the upper side in the drawing) of the lower plate 9B, this is passed through the communication groove 9Y of each beam member 9V. In order to flow into the outer adhesive groove 9E ′ (located on the lower side in the drawing) of the upper plate 9A, the upper ends of the inner and outer molding filters 8B and 8A are placed in the upper and lower adhesive grooves 9F ′ and 9E ′. These upper ends can be adhered and held in the holding portions 9F and 9E.
[0034]
FIG. 7 is an enlarged plan view of the plastic filter base plate 10 that is concentrically erected in a state where the inner and outer molded filters 8B and 8A are doubled, and FIG. A cross-sectional view taken along the Z-line, and the top surface of the circular filter base plate 10 having a dust-containing air inflow hole 10A opened at the center thereof is spaced apart with a notch 10K. A plurality of support pieces 10B... Provided in the circumferential direction are fitted into the ring-shaped inner fitting portion 10F for fitting the lower end portion of the inner molded filter 8B and the lower end portion of the outer molded filter 8A. The ring-shaped outer fitting portions 10E are concentrically formed, and after pouring an adhesive into the fitting portions 10F and 10E, the lower ends of the molding filters 8B and 8A are fitted. Te, each forming filter 8B, and the 8A to concentric inner and outer double structure, has a mechanism that can be erected on the filter base plate 10.
[0035]
In normal cases, the inner and outer forming filters 8B and 8A are erected on the filter base plate 10 and then turned upside down to attach the tips of the respective forming filters 8B and 8A to the step plate 9. The order of attachments 9 and 10 may be reversed, and the selection is arbitrary.
[0036]
Since the filter device for a dust collector according to the present invention has the configuration as described above, the filter device 8 uses the formed filter 8B, 8A configured in an inner and outer double, so that the filter device 8 does not have a large outer dimension. The filtration area can be increased to improve the filtration effect, and the entire filter device 8 can be made compact.
[0037]
Further, since the interval 8X between the inner and outer molded filters 8B and 8A is formed in a substantially tapered shape that gradually increases its area as it goes upward as shown in FIG. 3, it is filtered after flowing in from the inside and outside. The pressure loss of the air discharged through the distance 8X between the two molded filters 8B and 8A is small, and therefore the dust-containing air can be efficiently suctioned and filtered using the relatively small blower 11.
[0038]
Further, in the filter device according to the present invention, the interval 8X between the inner and outer molded filters 8B and 8A and the mounting state thereof are held by both the upper and lower step plates 9 and the filter base plate 10, so that the interval 8X is biased by the wind pressure. Therefore, the characteristics of the filter device 8 having a double structure can be exhibited without any problems over a long period of time.
[0039]
Next, according to the filter device for a dust collector according to the present invention, the dust removing operation for removing dust adhering to each of the molded filters 8B, 8A is performed by rotating the blade shaft 12 and using the dust removing hammer 12R. Since the bottom surface of the filter base plate 10 is hammered, the vertical direction (vertical direction) is applied to the entire filter device 8 so that the peaks and valleys are alternately arranged in a substantially star shape. The dust attached to the inner and outer molded filters 8B, 8A formed in the above can be surely wiped off simultaneously along the crests and troughs, and there is no need for air ejection etc. when removing the dust. Can be provided easily and at low cost.
[0040]
【The invention's effect】
Above mentioned depending on, according to the precipitator filter device according to the present invention, by performing the dust collector as the device example shown, the dust collector rich functionality which can exhibit an excellent dust collecting function and the dust removal function It has the advantage of being able to provide an ideal dust collector that can be manufactured at a low cost, with a small overall structure without reducing the dust collection capability. .
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an example of a dust collector that implements a filter device for a dust collector according to the present invention.
FIG. 2 is a plan view of a filter device for a dust collector according to the present invention.
FIG. 3 is a front sectional view illustrating the configuration of the dust collector filter device.
FIG. 4 is an enlarged plan view showing a step plate used in a filter device for a dust collector .
5 is a cross-sectional view taken along line YY in FIG.
FIG. 6 is a perspective view showing the step plate with the front and back turned upside down.
FIG. 7 is an enlarged plan view showing a filter base plate used in a filter device for a dust collector .
8 is a cross-sectional view taken along line ZZ in FIG.
[Explanation of symbols]
8 Filter device 8A Outer forming filter 8B Inner forming filter 8X Interval 9 Step plate 9A Upper plate 9B Lower plate 9D Discharge port 9E Outer holding portion 9F Inner holding portions 9E ', 9F' Adhesive groove 9V Beam member 9Y Connecting groove 9Z Weir 10 Filter base plate 10A Dust- containing air inflow hole 12 Hakata shaft 12R Dust removal hammer

Claims (3)

A filter device for a dust collector using a molded filter formed into a substantially star cross section as a filter for dust filtration,
On the filter base plate having an opening in the center, an outer formed filter made up of a cylindrical shape as a whole is erected. Inside this outer formed filter, the length is formed shorter than that of the outer formed filter, and the bottom side is formed. An inner molded filter, which is thick and close to the outer molded filter and whose upper side is gradually separated from the outer molded filter to form a tapered cylinder, is also concentrically spaced on the filter base plate. On the other hand, an outer holding part for attaching the upper end part of the outer forming filter and an inner holding part for attaching the upper end part of the inner forming filter to the step plate for holding the upper end part of the forming filter configured to be double inside and outside. The parts are formed with a step so as to be two steps up and down. An inner and outer adhesive groove for fitting and attaching the upper end of the filter is formed, and a communication groove for connecting the inner and outer adhesive grooves is provided in the beam member connecting the inner and outer holding parts. A filter device for dust collectors . On the bottom side of the filter base plate on which the inner and outer double formed filters are erected, there is provided a blade shaft configured to be rotatable in the circumferential direction. The blade shaft is centered on the blade shaft according to the rotation of the blade shaft. 2. The dust collector filter device according to claim 1, further comprising a pair of left and right dust removing hammer members that operate in a pendulum shape and can alternately strike the bottom surface of the filter base plate. 3. The dust collector filter device according to claim 2, wherein the dust removing hammer member is formed into a spherical shape using a plastic material.

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