JP2591869Y2 - Dust collector with air knocker - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust-collecting device which effectively prevents clogging of a filter and enhances dust-collecting ability, and in particular, peels off highly adherent powder or high-humidity powder adhered to a filter surface. The present invention relates to a dust collector having excellent effects.

[0002]

2. Description of the Related Art Generally, a dust collector has a structure in which air containing dust is introduced into a filter provided in a dust collector body, and the dust is collected by the filter to purify the air. Therefore, the filter is clogged with air containing a large amount of dust or air containing highly adherent powder or high-humidity powder, and the dust collecting ability is reduced. Therefore, conventionally, various means for preventing clogging of the filter have been devised.For example, a manifold is provided on the upper part of the bag filter, and dust adhering to the filter surface by intermittently ejecting high-pressure air from the manifold to the inside of the bag filter is provided. There is known a pulse jet type clogging prevention means for removing the dust (Japanese Utility Model Publication No. 1-312299). However, in this method, high-pressure air is injected toward the inside of the filter, so that the dust collected by the filter is pressed against the filter surface, and powder with high adhesion or powder with high humidity is firmly applied to the filter surface. As a result, it is difficult to effectively peel off even by intermittent waves of high-pressure air. The peel energy applied to the filter surface is 4-5G.
Degree, and has a peeling effect on soft filters but no effect on hard filters.

As an example of a means for preventing filter clogging by a mechanical method, an extension spring is provided inside a bag filter, and a dust attached to a filter surface is removed by extending a contracted bag filter by the spring. There is known a dust collector provided with a mechanism for performing the operation (Japanese Utility Model Publication No. Sho 62-5245). However, the above-described device has a problem in that since the spring is provided inside the filter, dust adheres to the spring and the extension of the spring is hindered, and the spring is apt to break down. Also, due to its mechanism, it cannot be applied to hard filters. In addition, vibrations that extend the filter by the spring cannot provide sufficient peeling energy to the highly adherent powder attached to the filter surface, and clogs air with highly adherent powder or high-humidity powder. The prevention effect is insufficient.

In addition to the above-described apparatus, an endless belt is provided below a cassette filter in which a number of plate-shaped filter bags are arranged, and a nodule-like pressure contactor is protruded from the endless belt, and the endless belt is driven by driving the endless belt. There is also known a dust collector which repeatedly hits a pressure contactor to the bottom of the filter to prevent clogging of the filter (Japanese Utility Model Application No. 3-9786).
Due to its mechanism, it is limited to a cassette type filter used for a vacuum cleaner or the like, and is hardly applicable to an industrial dust collector using a circular pleated filter. In addition, since the endless belt and its driving mechanism are provided near the bottom of the filter, there is a problem that dust easily adheres to the endless belt and easily breaks down.
In addition, a powder having a strong adhesiveness cannot be peeled off from the filter surface by an impact such that the pressure member hits the filter bottom while being pressed against the filter bottom.

[0005] In view of the above problems of the conventional apparatus, the present invention effectively separates the powder adhering to the filter surface from air containing strongly adherent powder or high-humidity powder. It is an object of the present invention to provide a dust collecting device which prevents clogging of the dust and exhibits a highly reliable dust collecting ability for a long time.

[0006]

The dust collecting apparatus of the present invention has the following configuration in order to solve the above-mentioned conventional problems . That is, this
The dust collecting device has a filter unit built in the dust collector body,
Dust collection to guide air containing dust to the filter
The air introduction passage formed at the top of the machine body and the filter
An exhaust path that guides clean air that has passed through the section to the outside, and a dust collector
Dust collector equipped with a dust outlet provided at the bottom of the main unit
It can be. And the filter part is hard
This filter formed by the filter element
Air air operated by compressed air below the element
A locker is provided. Air knockers are knocker cylinders
And the knocker housed inside this knocker cylinder
And a card. The knocker cylinder has the above
While providing a receiving plate that supports the bottom of the Luter element,
By fixing the lower end to the bottom of the dust collector body,
It forms the legs of the filter element and at the lower end
A connection joint with a supply pipe for compressed air is provided. Ma
The knocker weight is filtered by compressed air
The filter collides with the supporting plate for supporting the over element bottom
-Knocker cylinder to apply shear impact force to the element
The interior is vertically movable inside. Air knockers
Equally spaced along the bottom of the above filter element
Is good for generating a uniform impact force.

As the material of the hard filter element, a commonly used material can be used, and the material is appropriately selected according to the type and amount of dust and the use environment of the device. As one example, a polyester long fiber processed into a paper shape by heat welding and formed into a pleated shape is suitably used. For high-temperature air, a filter element formed of an inorganic material so as to have heat resistance is used.

[0008] The air knocker provided below the filter element is formed by a knocker cylinder and a knocker weight housed therein so as to be vertically movable.
The knocker weight moves up and down quickly and intermittently at high speed inside the knocker cylinder by pulsed high-pressure air introduced into the knocker cylinder, collides with the filter element facing the top of the knocker cylinder and the bottom, and shears the filter element. Give impact force. In this case, a receiving plate for supporting the bottom of the filter element is provided at the upper end of the knocker cylinder so that a local impact due to the knocker weight can be reduced and an impact force can be applied to the entire filter element. And an impact force is applied to the filter element via the receiving plate . The receiving plate may be provided with a sleeve projecting downward so as not to fall off due to the collision of the knocker weight, and may be mounted on the upper end of the knocker cylinder via the sleeve. The knocker cylinder stands from the bottom of the main body of the dust collector toward the filter element, and supports the bottom of the filter element via the receiving plate, thereby also serving as a leg of the filter element. I have. It is preferable that a plurality of the air knockers are provided at equal intervals along the bottom surface of the filter element so as to give a uniform impact force to the entire filter element. The number of air knockers is appropriately determined according to the size of the filter element and the type and amount of dust. The filter element is made of a hard element so as not to be damaged by the knocker weight collision.Furthermore, the filter element is loosely fitted to a frame fixed to the dust collector body to reduce the impact, or an elastic material such as a spring material or rubber is used. It may be elastically supported with an interposition.

[0009]

The air containing dust is guided to the filter element from the top of the dust collector body, the dust in the air is collected by the filter element, and the purified air passing through the filter element is sucked outside through the exhaust path. Exhausted. If dust adheres to the filter element after a certain period of operation and the ventilation resistance becomes high, the introduction of air is stopped, pulsed high-pressure air is sent to the air knocker, and the knocker weight stored inside the knocker cylinder is moved at high speed. To make it intermittently collide with the bottom of the filter element. The impact time, impact strength, and the like are appropriately determined by adjusting the pressure of the high-pressure air according to the amount of air blown and the type and amount of dust. When the knocker weight collides from below, a shear impact force acts intermittently on the filter element, and the dust adhering to the filter surface is strongly wiped off. As an example, conventionally, an impact force of 10 to 20 G larger than the impact force given by an air jet or the like can be given, and this impact force acts as a shear stress from below on the filter surface. Highly adhering powders and high-humidity powders, such as solidifying powder and cement dust, which were difficult to peel off, float up from the filter surface due to this impact force, and easily peel off with a relatively small amount of air. Is done.

In this case, the above-mentioned receiving plate is provided on the upper end of the knocker cylinder, and if necessary , a plurality of air knockers are arranged at equal intervals along the bottom surface of the filter element.
As a result , the shear impact force acts uniformly on the entire filter element, and dust adhering to the filter surface is effectively peeled off and removed. Air knocker knocker cylinder
Filter also serves as the filter element legs,
There is no need to provide separate legs for supporting the luter element.
Further, by loosely fitting or elastically supporting the filter element on the frame, damage to the filter element due to collision of the knocker weight is prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. FIG. 1 is a schematic longitudinal sectional view showing an example of the dust collecting apparatus according to the present invention, and FIG. 2 is a schematic transverse sectional view thereof. In the illustrated dust collector, the dust collector main body 11 has a cylindrical shape, and a cover portion 12 that covers the upper surface of the main body is provided at an upper portion thereof. An air inlet 13 is formed at a side end of the cover 12, and an air inlet 14 is provided between the cover 12 and the upper surface of the main body.
Are formed. A duct 15 for guiding air containing dust is connected to the inlet 13, and the inlet 13 and the inlet 1
Air containing dust is introduced into the dust collector through 4.
A hanging member 16 having an engagement hole is attached to the upper surface of the cover portion 12.

Inside the dust collector main body 11, a cylindrical filter 20 having an outer diameter slightly smaller than its inner diameter is provided. The filter 20 is formed by a hard filter Jer main cement 21 pleated, the inner circumferential end portion 21b and the outer peripheral end portion 21a and the frame 22 is provided, the frame 22 is protruded provided on its upper surface Part 23
The filter element 21 is suspended from the main body 11 of the dust collector by the frame 22.

A disc-shaped guide plate 24 is disposed above the filter element 21.
An opening 25 facing the upper part of the filter element 21 is formed in 4, and the air guided through the introduction path 14 is introduced into the filter element 21 from the opening 25.

As described above, the upper half of the interior of the dust collector body is occupied by the filter element 21.
An air knocker 30 operated by compressed air is provided below the filter element 21. As shown in FIG. 3, the air knocker 30 is a knocker cylinder 3
1 and a knocker weight 32 housed therein. The knocker cylinder 31 is erected from the bottom inclined surface 52 of the dust collector main body 11 toward the bottom of the filter element 21, and the lower end thereof is connected to the bottom inclined surface 52.
And a joint 36 for connection to a compressed air supply pipe is provided. The upper end of the knocker cylinder 31 faces the bottom of the filter element 21 and a receiving plate 33 supporting the bottom of the filter element.
Is mounted on the upper end of the knocker cylinder via a sleeve 34 projecting downward. Filter element 2
1 is supported by the frame 22 and the receiving plate 33, so that the knocker cylinder 31 also serves as a leg of the filter element 21. A knocker weight 32 is accommodated inside the knocker cylinder 31 so as to be vertically movable, and the knocker weight 32 collides with the bottom of the filter element by the compressed air introduced into the cylinder. In order to reduce the air resistance to the knocker weight 32, an exhaust hole 35 is provided at the upper end of the knocker cylinder 31.
Are drilled.

The knocker weight 32 housed inside the knocker cylinder 31 is instantly pushed upward at a high speed by the compressed air supplied into the cylinder 31 and collides with the bottom of the filter element via the receiving plate 33. A shear impact force is applied to the filter element 21. Preferably, a plurality of the air knockers 30 are provided at equal intervals with respect to the bottom surface of the filter element 21 so that a uniform shear impact force is applied to the entire filter element. In this embodiment, three air knockers 30 are provided.

An exhaust passage 40 is formed on the side wall of the dust collector main body 11 below the filter element 21 and extends to the side of the main body. An intake duct 42 for guiding the converted air to the outside is connected.

The bottom portion 50 of the dust collector main body 11 is formed by a central discharge portion 51 on which dust is deposited and a bottom surface 52 inclined toward the discharge portion 51. A dust outlet 53 is formed on a side wall of the discharge portion 51. Is provided. The outlet 53 is closed by a lid 54 and is opened when dust accumulated on the bottom 50 is taken out. The outlet 53 may be provided with a mechanism for sucking and discharging the accumulated dust.

The dust-containing air flows from the duct 15 to the inlet 1
The dust in the air is collected by the filter element 21 and passes through the filter element 21 and the purified air passes through the exhaust path 40 via the intake duct 42 via the exhaust path 40. It is sucked and exhausted to the outside. After the operation for a certain period of time, the introduction of air is stopped, high-pressure air in a pulse form is sent to the air knocker 50, and the knocker weight 32 intermittently collides with the bottom of the filter element via the receiving plate 33 at the upper end of the knocker cylinder. The impact time and impact strength are appropriately determined by adjusting the pressure of the high-pressure air according to the amount of air and the type and amount of dust. Due to the collision of the knocker weights 32, a shearing impact force acts intermittently on the filter element 21, and the dust adhering to the filter surface is strongly wiped off. The fallen dust slides down the inclined bottom surface 42 and collects at the discharge portion 51 at the center of the bottom portion, and is appropriately taken out from the outlet 53.

[0019]

[Effect of devised the present invention of the dust-collecting device, supporting the filter element bottom of the Nokkaweto by Eanokka
Unlike the conventional device that simply gives vibrations and air waves as in the conventional device, it intermittently collides with the receiving plate from below. A large shear stress acts directly on the peeling surface, and the dust adhering to the filter surface and the peeling surface can be strongly removed. Therefore, it is possible to effectively exfoliate the powder adhering to the filter with a relatively small amount of air even for highly adherent powder such as caking powder and cement dust and high humidity powder. Thereby, clogging is prevented and excellent dust collecting ability is exhibited for a long period of time. In addition, the knocker mechanism provided inside the dust collector is operated by high-pressure air and is not driven by mechanical means such as a motor, so that there is almost no failure due to dust adhesion and high reliability. Furthermore, according to the present invention, the knock of the air knocker
The cylinder serves as the leg supporting the filter element.
Therefore, the filter element can be
Can be supported without fail.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view showing an example of a dust collector according to the present invention.

FIG. 2 is a schematic cross-sectional view of the dust collector.

FIG. 3 is a sectional view of an air knocker provided in the dust collector.

[Explanation of symbols]

 11-Dust collector body 14-Air introduction path 20-Filter 21-Filter element 22-Frame 23-Guide plate 30-Air knocker 31-Knocker cylinder 32-Knocker weight 33-Receiving plate 40-Exhaust path 50-Bottom of dust collector

Claims (2)

(57) [Scope of request for utility model registration] 1. A filter unit provided inside a dust collector body.
And the above to guide air containing dust to the filter section
The air introduction passage formed in the upper part of the dust collector
Exhaust path to guide the clean air that has passed through the
Dust collector equipped with a dust outlet provided in the lower part of the dust machine body
In the installation, the above filter part is hard filter element
Formed by compressed air below this filter element
A moving air knocker is provided. This air knocker is equipped with a knocker cylinder and this knocker.
And a knocker weight housed inside the cylinder. The knocker cylinder has the filter element at the upper end.
Provide a support plate to support the bottom of the
The filter element is fixed to the bottom of the main unit.
And a compressed air supply pipe at the lower end.
Connection joint portion is provided, and also, the Nokkaueto, said off by compressed air
The plate collides with the receiving plate supporting the bottom of the filter element and
The above-mentioned notch is applied to apply a shear impact force to the filter element.
A dust collector equipped with an air knocker , which is vertically movable inside a cylinder . 2. A method according to claim 1, wherein a plurality of said air knockers are provided.
Equally spaced along the bottom of the Luter element
, The dust collector according to claim 1.