CN109794111B

CN109794111B - Filter bag for dust collector

Info

Publication number: CN109794111B
Application number: CN201810834630.7A
Authority: CN
Inventors: 金钟门; 金东溋; 申相默
Original assignee: Dongmen Environmental Technology Co ltd
Current assignee: Dongmen Environmental Technology Co ltd
Priority date: 2017-11-16
Filing date: 2018-07-26
Publication date: 2021-06-08
Anticipated expiration: 2038-07-26
Also published as: KR101998373B1; JP6853804B2; CN109794111A; WO2019098492A1; KR20190056092A; JP2019089057A

Abstract

A filter bag for a dust collector includes a filter member, a band member, and a plurality of reinforcing members. The filter element is provided with pleats having pleat ridges and pleat valleys alternately arranged in a circumferential direction. The band is arranged in a circumferential direction to surround the outer surface of the filter member and is sewn to the pleat ridges and the pleat valleys. The reinforcing member is installed at the valley of the pleats and extends in the longitudinal direction of the filter member.

Description

Filter bag for dust collector

Technical Field

The present disclosure relates to a filter bag for a dust collector.

Background

A dust collector is a purifier that removes dust such as solid or liquid fine particles (hereinafter, generally referred to as "gas") contained in air or gas. The dust collector may filter dust present in the gas, and then may reintroduce the gas into the room or discharge the gas to the outside of the room.

One or more dust collecting filters (hereinafter, referred to as "filter bags") may be installed in the dust collector, and the filter bags may filter dust and the like contained in the gas and may supply the purified gas.

Typically, in a filter bag, a retainer may be provided within the substantially cylindrical filter cloth to retain the filter cloth in a tubular shape. In recent years, in order to improve dust collecting efficiency, the filter cloth of the filter bag is repeatedly folded in a circumferential direction to form pleats, thereby increasing a surface area. The cylindrical filter bag may be formed by interconnecting opposite ends of the filter cloth with pleats formed thereon.

Meanwhile, in the filter bag, dust adheres to its filter cloth as time passes, and the amount of pressure loss in the filter bag is rapidly increased. Therefore, a dust removing operation is periodically performed to remove dust attached to the filter bags by air shaking with compressed air, shaking, or other methods.

In a dust removing operation by air pulse, high-pressure compressed air is injected from the upper end of the filter bag toward the inside of the bag through the blow pipe nozzle, thereby removing accumulated dust by a shock wave of the compressed air.

The conventional pleated filter bag for a dust collector is provided with an outer band made of fiber or metal on an outer circumferential surface of the filter bag to prevent the pleats from being excessively expanded by compressed air during a dust removing operation by air pulse and to prevent the pleats from not being restored to an original state. The outer band is secured to two or more pleat ridges in respective portions of the pleats, conforming to the height thereof, to maintain the pleats.

However, the conventional filter bags as described above have a problem in that a portion of the filter bag not fixed to the outer band rubs against the outer band during air pulse operation using compressed air, resulting in premature wear of the filter bag.

Further, in the conventional filter bag, there is a problem in that when dust falls from an upper portion of the filter bag, the outer band may be broken due to friction or impact of the dust with the outer band.

Moreover, in conventional filter bags, only the pleat ridges are secured to the outer band. As a result, the expansion of the filter bags cannot be properly controlled, which presents a problem in that wear may occur due to contact with adjacent filter bags.

In addition, in conventional filter bags, only the pleat ridges are fixed to the outer band, resulting in the disadvantage of uneven expansion of the pleats during air pulse operation using compressed air.

Disclosure of Invention

Embodiments of the present invention provide a filter bag for a dust collector capable of securely fastening a strap to the filter bag to reduce friction therebetween, thereby improving durability of the filter bag and the strap, preventing premature wear of the filter bag, and ensuring that wrinkles are uniformly maintained when the bag is inflated.

Further, embodiments of the present disclosure provide a filter bag for a dust collector, which can prevent a warp of the filter bag by setting a direction of wrinkles sewn to a belt.

According to an aspect of the present invention, there is provided a filter bag for a dust collector, including: a filter member having pleats having pleat ridges and pleat valleys alternately arranged in a circumferential direction; and a band member disposed in a circumferential direction to surround an outer surface of the filter member and sewn to the corrugation ridges and the corrugation valleys.

The filter bag may further include a plurality of reinforcing members installed at the valley of the pleats and extending in a longitudinal direction of the filter member.

The valley may have a receptacle for receiving a reinforcement member.

The reinforcement may be formed of a cylindrical rope or a webbing.

The band may include a plurality of bands spaced apart from each other in a longitudinal direction of the filter member.

The strips may be sewn to the filter element such that the pleats sewn to adjacent strips are folded in opposite directions.

The reinforcement may be formed of a reinforcing fabric mounted on the entire outer surface of the valley to surround the entire outer surface of the valley.

The reinforcement may be formed of a reinforcing fabric mounted on a portion of an outer surface of the valley to surround the portion of the outer surface of the valley.

According to another aspect of the present disclosure, there is provided a filter bag for a dust collector, including: a plurality of filter elements having pleats having pleat ridges and pleat valleys alternately arranged in a circumferential direction; a band member disposed in a circumferential direction to surround an outer surface of the filter member and sewn to the corrugation ridges and the corrugation valleys; and a connection strip sewn to a boundary portion of each filter member to connect the filter members to each other.

The connecting strip may include an outer strip and an inner strip, which are sewn to the outer surface and the inner surface of each filter element, respectively.

The valley may have a receptacle for receiving a reinforcement member.

According to embodiments of the present invention, it is possible to improve durability of the filter bag and the strap and prevent premature wear of the filter bag or breakage of the strap by firmly fixing the entire folds and the strap of the filter bag to reduce friction.

Further, according to embodiments of the present disclosure, it is possible to prevent the filter bag from being excessively expanded during the air pulse operation, so that the upper and lower portions of the filter bag are uniformly expanded, and so that the wrinkles are restored to the original state after the air pulse.

In addition, according to an embodiment of the present disclosure, the filter bag may be prevented from being distorted by setting the direction of the pleats sewn to the band to be different.

Drawings

Fig. 1 is a perspective view schematically illustrating a filter bag for a dust collector according to a first embodiment of the present disclosure.

Fig. 2 is a sectional plan view taken along line a-a in fig. 1.

Fig. 3 is a sectional plan view taken along line B-B in fig. 1.

Fig. 4 is a sectional plan view taken along line C-C in fig. 1.

Fig. 5 and 6 are sectional plan views showing other examples of the reinforcing member.

Fig. 7 is an exploded perspective view schematically illustrating a filter bag for a dust collector according to a second embodiment of the present disclosure.

FIG. 8 is an assembled perspective view of the filter bag shown in FIG. 7.

Fig. 9 is a vertical sectional view taken along line D-D in fig. 8.

Detailed Description

Hereinafter, the configuration and operation of the embodiments will be described in detail with reference to the accompanying drawings. The following description is one of the various patentable aspects of the disclosure, and may form part of the detailed description of the disclosure.

However, in describing the present disclosure, a detailed description of known configurations or functions, which make the present disclosure obscure, may be omitted.

The present disclosure may be modified and include various embodiments. Specific embodiments will be shown by way of example in the drawings and will be described in detail in the detailed description of the embodiments. It should be understood, however, that they are not intended to limit the disclosure to the particular embodiments, but rather, to cover all modifications, similarities and substitutions included within the spirit and scope of the disclosure.

As used herein, the terms including ordinal numbers such as "first" and "second" may be used to describe various components rather than to limit the various components. These terms simply distinguish one component from another.

When a component is said to be "connected" or "linked" to another component, it is to be understood that the former component can be directly connected or linked to the latter component, or a third component can be interposed between the two components.

Specific terminology in the disclosure is used for describing particular embodiments only and is not intended to be limiting of the disclosure. Unless the context clearly dictates otherwise, expressions used in the singular include expressions in the plural.

Hereinafter, a filter bag for a dust collector according to a first embodiment of the present disclosure will be described with reference to the accompanying drawings.

Referring to fig. 1, a filter bag 10 for a dust collector according to a first embodiment of the present disclosure may include a filter member 100, a band member 200, and a plurality of reinforcement members 300.

The expression that an embodiment of the present disclosure includes the above-listed components does not mean that the embodiment is composed of only these components, but means that the embodiment substantially includes these components. This embodiment may further include other components (e.g., components known in filter bags for dust collectors). However, well-known components will not be described in detail as they may obscure the subject matter of the present disclosure.

The filter member 100 is a fabric of material used as a dust filter. The filter member 100 may be provided with pleats 110, and the pleats 110 are formed by continuously folding the fabric to have intervals in the circumferential direction.

Each corrugation 110 may be composed of corrugation ridges 111 and corrugation valleys 112. The corrugation ridges 111 and corrugation valleys 112 continuously alternate along the circumferential direction X of the filter member 100, thereby forming the corrugations 110.

In this regard, the wrinkle ridges 111 may refer to folded portions located at relatively high positions in the wrinkles 110, and the wrinkle valleys 112 may refer to folded portions located at relatively low positions in the wrinkles 110.

The pleats 110 may be arranged to have directionality in which the pleats 110 are folded in a specific direction (hereinafter, referred to as "folding direction") in the circumferential direction of the filter member 100. The reason why the pleats 110 are arranged to have the folding direction will be described later.

In the filter bag 100 for a dust collector according to the present embodiment, as shown in fig. 2, the filter member 100 may be provided in a cylindrical shape such that the holder 90 may be inserted into the inside of the filter member 100. The spirit of the present disclosure is not limited thereto. The shape of the filter member 100 may be appropriately changed as needed.

The filter member 100 may be a non-woven fabric manufactured by a method of needling a thermoplastic resin composed of a polymer material (e.g., PE, PP, PPs, NOMEX, PTFE (polytetrafluoroethylene), etc.) at a high temperature (180 to 260 ℃) or a normal temperature (120 ℃ or lower), a glass fiber fabric produced by a weaving method, or a fiber material subjected to a special surface treatment. The pleats 110 of the filter pack 100 may be formed using a pleating process or the like as is known in the art.

For reference, the nonwoven fabric is formed by entangling short or long fibers with each other, and may be formed by a wet process, a spunbond process, a span-binding process, a calender-bonding process, a needle-punching process or the like. In particular, the non-woven fabric for room temperature may be made of a material selected from polyester, acrylic and polypropylene. The non-woven fabric for high temperature may be made of a material selected from the group consisting of polyamide, polyimide, polyamideimide, polyphenylene sulfide, polysulfonamide, Polytetrafluoroethylene (PTFE) and glass fiber.

The band 200 is an element provided on the outer surface of the band-shaped filter member 100, and surrounds the filter member 100 in the circumferential direction X of the filter member 100. The band 200 may be formed of an elastic material that can be stretched and contracted as needed. Therefore, the belt member 200 holds the reinforcing member 300 even when the filter member 100 receives an external force. Further, the band 200 protects the wrinkles to restore the original shape.

Specifically, the band member 200 provides a structure for surrounding the outer circumferential surface of the filter member 100 in the circumferential direction. Since the band 200 is uniformly sewn to the pleat ridges 111 and the pleat valleys 112 when the band 200 is fixed to the filter 100, the band 200 can be completely sewn to the pleats 110. At this time, the band 200 may be sewn to the wrinkle ridges and valleys in a state where the wrinkles 110 are folded in one direction.

In the filter bag 10 according to the present embodiment, the band 200 is uniformly sewn to the entire pleats 110 on the outer circumferential surface of the filter member 100 in the circumferential direction by the sewing thread 210. Therefore, the band member 200 can be fixedly installed to be in close contact with the filter member 100, thereby leaving a small space between the band member 200 and the filter member 100.

Therefore, when the dust removing operation is performed by the air pulse, the conventional problem of breakage of the belt due to the weight of dust and the problem of premature wear of the filter bag due to friction can be solved. When the filter bag is inflated, the whole filter bag is uniformly maintained, and the folds are uniformly expanded, so that the dust removal performance of the filter bag is improved.

In addition, as shown in fig. 1, a plurality of strips 200 may be provided to enhance local rigidity of the filter member 100 and to enhance the effect of maintaining the pleated shape and protecting the pleats.

When the strips 200 are provided, they may be arranged spaced apart from each other along the longitudinal direction Y of the filter element 100.

The bands 200 may be arranged at regular intervals along the longitudinal direction Y of the filter member 100. The bands 200 may be arranged at irregular intervals, if desired.

In this regard, the width of the bands 200 may be set to about 20 to 40mm and the interval between the bands 200 may be set to about 400 to 1000mm in consideration of the pressure of the pulsating air and the characteristics and concentration of dust. .

Meanwhile, when the bands 200 are arranged to be spaced apart from each other along the longitudinal direction of the filter 100, the bands 200 may be sewn to the filter 100 such that the folding direction of the pleats 110 is sewn to two adjacent bands 200 opposite to each other as shown in fig. 3 and 4.

Thus, for example, if the pleat 110 sewn to one belt 200 (referred to as "first belt" for convenience) is folded to be located on the left side, the pleat 110 sewn to the other belt 200 (referred to as "second belt" for convenience) may be folded to the right adjacent to the first belt 200.

The reason why the folding directions of the pleats 110 sewn to two adjacent strips 200 are set to be opposite to each other is to prevent the filter 100 from being twisted due to the power acting in opposite directions during the air pulse operation.

For example, if the folding directions of the pleats 110 are all in the same direction, the filter pack 100 may be distorted in the folding direction of the pleats 110 by high-pressure air during the dust removing operation, and thus the filter pack 100 may be distorted as a whole. However, if the folding directions of the pleats 110 are set to be opposite to each other for each adjacent band 200 as in the present embodiment, the torsional rigidity of the filter pack 100 increases. This makes it possible to prevent the filter 100 from being distorted during the high-pressure air pulse operation. For reference, when the filter pack 100 is twisted and the pleats 110 are inclined, the inclined pleats may hinder the removal of dust, and the dust may cause friction and abrasion of the fabric. This may shorten the service life of the filter bag.

As shown in fig. 2 to 4, the reinforcing member 300 is installed at the corrugation valleys 112 of the filter member 100. The reinforcing member 300 may be located inside the band member 200 and may extend along the longitudinal direction Y of the filter member 100.

The reinforcing member 300 may provide rigidity to the valley 112 so that the filter 100 may maintain a corrugated shape for a long time.

When the corrugation valleys 112 are pushed to the outside of the filter 100 by the high pressure air during the air pulse operation, the reinforcing members 300 extending in the longitudinal direction of the corrugation valleys 112 are caught by the belt members 200. Therefore, the reinforcing member 300 may prevent the other portions of the filter 100, which are not sewn to the band 200, from being excessively expanded. Further, after the air pulse operation is completed, the wrinkle valleys 112 may be easily returned to the original state (original position) by the reinforcement member 300.

As shown in fig. 2, the receiving portion 112a may be formed near the valley 112 of the filter 100 so that the reinforcing member 300 may be installed in the valley 112. The receiving portion 112a may be formed with a receiving space into which the reinforcing member 300 is inserted. The receiving portion 112a may be formed by sewing on one side of the valley 112.

As shown in an enlarged view on an example-by-example basis in fig. 2, the reinforcing member 300 may be provided in the form of a band (pipe line) or a webbing having a cylindrical shape. The reinforcing member 300 may have a length corresponding to the overall length of the filter member 100.

In other words, the reinforcement may be formed of a wire having a cylindrical shape. Alternatively, the fabric of the filter 100 may be cut into strips and may be adhered or mixed to the pleat valleys 112, thereby increasing the supporting force of the pleat valleys 112 to reinforce the pleats 110.

Therefore, when the reinforcement member 300 is installed at the valley 112, the reinforcement member 300 is positioned inside the band member 200 to maintain the corrugated shape of the filter member 100. As the valley folds 112 expand outward during the air pulse operation, the belt 200 holds the stiffener 300 and supports all of the valley folds 112 in the longitudinal direction. This may prevent the valley 112 from being excessively expanded outward from the band 200 and may help the valley 112 to return to an original state when the air pulse operation is completed.

According to another embodiment of the present disclosure, as shown in fig. 5, the reinforcement member 300 may be formed of a reinforcing fabric disposed on the entire outer surface of the valley 112 to surround the entire outer surface of the valley 112. At this time, the reinforcement members 300 may be in contact with the entire outer surfaces of the valley 112, and may be sewn to the valley 112 along the sewing lines, thereby reinforcing the valley 112.

According to another embodiment of the present disclosure, as shown in fig. 6, the reinforcement member 300 may be formed of a reinforcement fabric disposed on a portion of the outer surface of the valley 112 to surround a portion of the outer surface of the valley 112. At this time, the reinforcement member 300 may be in contact with only a portion of the outer surface of the valley 112, and may be sewn to the valley 112 along the sewing line, thereby reinforcing the valley 112.

Hereinafter, a filter bag for a dust collector 20 according to a second embodiment of the present disclosure will be described with reference to fig. 7 to 9.

As shown in fig. 7, according to the second embodiment of the present invention, filter members 100 having a certain length are coupled to each other to manufacture a filter bag 100 having a length longer than that of one filter member 100. Therefore, the length of the filter member 100 is predetermined, and thus, it is necessary to connect a plurality of filter members 100 to manufacture the filter bag 20 having a length longer than that of one filter member 100.

The filter bag 20 for a dust collector according to the second embodiment of the present disclosure may include a plurality of filter members 100, a band member 200, a plurality of reinforcement members 300, and a connection strip 400.

The structures of the filter member 100, the band member 200, and the reinforcing member 300 are the same as those of the first embodiment described above. Therefore, redundant description thereof will be omitted. However, in the second embodiment of the present disclosure, two or more filter pieces 100 may be used.

Hereinafter, the connection bar 400 will be described. As shown in fig. 7 and 8, the plurality of filter members 100 are arranged to extend in the longitudinal direction. In this state, a seam 401 may be formed at a boundary portion between the adjacent filter pieces 100 to connect the filter pieces 100 to each other.

At this time, the connection bar 400 may be provided only on the outer surface of each filter member 100. Alternatively, the connection strip 400 may be provided on both the outer surface and the inner surface of each filter member 100. The coupling force of the plurality of filter members 100 is increased.

Specifically, as shown in fig. 9, the connecting strip 400 may include an outer strip 410 and an inner strip 420.

The outer strip 410 is disposed outside the boundary portion of the adjacent filter member 100, and may be sewn to the filter member 100 to attach the filter member 100 at the outside thereof.

Further, the inner strip 420 is disposed in a boundary portion of the adjacent filter member 100, and may be sewn to the filter member 100 to attach the filter member 100 at the inside thereof.

Fig. 9 is a sectional view (taken along line DD in fig. 8) obtained by longitudinally cutting adjacent filter elements 100 to show the connection structure of the filter elements 100, the outer strip 410 and the inner strip 420. The structure in which the connection strip 400 is sewn to the filter member 100 is the same as that of the first embodiment described above, in which the band member 200 is sewn to the filter member 100, except that the inner strip 420 is additionally provided.

As described above, if the filter members 100 having a certain length are connected to each other by the connection strip 400, it is possible to manufacture the filter bag 20 having a length longer than that of one filter member 100.

Although the present disclosure has been described using preferred embodiments, the scope of the present disclosure is not limited to the specific embodiments described above. Persons having ordinary knowledge in the relevant art will be able to replace or modify the constituent elements. Such substitutions or modifications are to be construed as falling within the scope of the present disclosure.

Claims

1. A filter bag for a dust collector, comprising:

a filter member having pleats having pleat ridges and pleat valleys alternately arranged in a circumferential direction; and

a band member disposed in a circumferential direction to surround an outer surface of the filter member and sewn to the corrugation ridges and the corrugation valleys;

wherein the band includes a plurality of bands spaced apart from each other in a longitudinal direction of the filter member; and

wherein the strips are each sewn to the filter element such that the pleats sewn to adjacent strips are folded in opposite directions.

2. A filter bag as defined in claim 1 further comprising:

a plurality of reinforcing members installed at the valley folds and extending in a longitudinal direction of the filter member.

3. A filter bag as claimed in claim 2 wherein the valley has a receptacle for receiving the reinforcement.

4. A filter bag as claimed in claim 2 wherein the reinforcement is formed from a cylindrical rope or webbing.

5. A filter bag as claimed in claim 2 wherein the reinforcement is formed of a reinforcing fabric mounted on the entire outer surface of the valley to surround the entire outer surface of the valley.

6. A filter bag as claimed in claim 2 wherein the reinforcement is formed of a reinforcing fabric which is mounted on a portion of the outer surface of the valley to surround a portion of the outer surface of the valley.

7. A filter bag for a dust collector, comprising:

a plurality of filter members having pleats having pleat ridges and pleat valleys alternately arranged in a circumferential direction;

a band member disposed in a circumferential direction to surround an outer surface of the filter member and sewn to the corrugation ridges and the corrugation valleys; and

a connecting strip sewn to a boundary portion of each of the filter members to connect the filter members to each other;

8. A filter bag as defined in claim 7 further comprising:

a plurality of reinforcing members installed on the valley and extending in a longitudinal direction of the filter member.

9. A filter bag as claimed in claim 7 wherein the connecting strip comprises an outer strip stitched to the outer surface of each filter element and an inner strip stitched to the inner surface of each filter element.

10. A filter bag as claimed in claim 8 wherein the valley has a receptacle for receiving the reinforcement.