CN112295327A - Dust removal filter bag - Google Patents
Dust removal filter bag Download PDFInfo
- Publication number
- CN112295327A CN112295327A CN201910654198.8A CN201910654198A CN112295327A CN 112295327 A CN112295327 A CN 112295327A CN 201910654198 A CN201910654198 A CN 201910654198A CN 112295327 A CN112295327 A CN 112295327A
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- Prior art keywords
- bag
- cloth
- filter
- bag body
- expansion ring
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- 239000000428 dust Substances 0.000 title claims abstract description 66
- 239000004744 fabric Substances 0.000 claims abstract description 261
- 239000000463 material Substances 0.000 claims description 48
- 238000009958 sewing Methods 0.000 claims description 36
- 238000011049 filling Methods 0.000 claims description 32
- 239000002356 single layer Substances 0.000 claims description 27
- 239000010410 layer Substances 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000004026 adhesive bonding Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 28
- 238000001914 filtration Methods 0.000 abstract description 12
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000003292 glue Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
A large number of pinholes and cloth seams which are generated due to manufacturing exist at the bag mouth of the existing dust removal filter bag, and the pinholes and the cloth seams form a main dust removal channel, so that the filtering performance of the dust removal filter bag is reduced. The invention discloses a dust-removing filter bag, wherein a bag opening is formed by wrapping an expansion ring by adopting bag opening cloth and the end part of bag body filter cloth together, or wrapping the expansion ring by inwards turning or outwards turning the end part of the flat bag body filter cloth at least twice, or wrapping the expansion ring by inwards turning or outwards turning the folded bag body filter cloth. Thoroughly eliminates the problems of needle holes and cloth seams dust discharge channels at the bag mouth and effectively improves the filtering performance of the dust removal filter bag.
Description
Technical Field
The invention relates to a dust removal filter bag, and belongs to the field of environmental protection dust removal.
Technical Field
The dust filter bag bears the important work of filtering dust in the dust remover, and the filtering performance of the dust filter bag has decisive influence on the whole dust removing system. At present, the dust-removing filter bags mainly comprise two types, namely a pleated filter bag and a flat bag (all non-pleated filter bags), the two types of dust-removing filter bags are sewn through needles and threads when the bag openings are manufactured, a large number of needle holes and cloth seams are formed in the bag openings by the manufacturing method, the needle holes and the cloth seams form main dust exhaust channels, and the dust cleaning performance of the dust-removing filter bags is reduced.
In the prior art, when a bag opening of a dust-removing filter bag is manufactured, an expansion ring and a clamping strip are completely wrapped by a piece of single cylindrical filter cloth, and the bottom edge of the cylindrical filter cloth wrapped by the expansion ring and the clamping strip is sewn with the end part of a folded bag body or a flat bag body by using a needle thread to form the bag opening; or the end part of the flat bag body filter cloth is turned inwards or outwards once and then is wrapped with the expansion ring, and the turned filter cloth end part is connected with the bag body through sewing to form a bag opening. The two sewing methods form a large number of pinholes and cloth seams below the bag opening expanding ring part, and the parts of the bag opening where the pinholes and the cloth seams exist also need to be filtered, so the pinholes and the cloth seams form a main dust exhaust channel. When the dust-removing filter bag produced by the method is used for filtering, a large amount of fine particle dust is discharged from the needle holes and cloth seams at the bag opening, so that the filtering performance of the dust-removing filter bag is reduced.
In order to solve the problem, some people in the industry adopt a mode of sticking an adhesive strip at a connecting position or a mode of coating the outer surface of a sewing part with glue to block a needle hole and a cloth seam. However, the environment in the dust remover is harsh, and the adhesive tape or the adhesive is easy to corrode and fall off. And for the fold filter bag, the connection part of the fold filter bag contains folds, so that cloth seams formed by the folds cannot be eliminated, dust can enter more easily due to uneven fold surfaces and gaps on adhesive surfaces, the non-adhered adhesive strips can fall off more easily due to the influence of the external environment, the two methods cannot effectively solve the dust exhaust problem of pinholes and cloth seams, and the cost is high. The invention is especially proposed for solving the problems of needle holes and cloth seam dust exhaust channels existing in the bag mouth of the dust-removing filter bag.
Technical scheme
The invention provides a novel dust removal filter bag aiming at the problems of needle holes and cloth seam dust removal at the bag opening of the existing dust removal filter bag, and thoroughly solves the problems of needle holes and cloth seam dust leakage at the bag opening of the dust removal filter bag.
The dust-removing filter bag comprises a bag opening, a folded bag body or a flat bag (non-folded) bag body and a bag bottom. Wherein, the bag mouth part comprises an expansion ring and a bag body filter cloth end part, or comprises the expansion ring, the bag body filter cloth end part and bag mouth cloth.
The bag is characterized in that the bag opening adopts one of the following forms:
A) the bag mouth cloth and the end part of the bag body filter cloth are jointly wrapped with an expansion ring to form a bag mouth;
the bag opening is arranged on the inner side or the outer side of the end part of the bag body filter cloth, and the bag opening and the end part of the bag body filter cloth are jointly wrapped by the expansion ring in an inward turning or outward turning mode to form the bag opening. The shape and size of the pocket cloth are determined by the perimeter and width of the expander, and the width of the pocket cloth is larger than the width of the expander. The bag opening cloth can be connected with the end part of the bag body filter cloth firstly, then the expansion ring is put in, and then the bag opening cloth is turned inwards or outwards and wraps the expansion ring together with the end part of the bag body filter cloth; the bag mouth cloth can also wrap the expansion ring firstly, then the bag mouth cloth and the expansion ring are put into the inner side of the end part of the bag body filter cloth after being formed into a cylinder together, and the bag mouth cloth and the end part of the bag body filter cloth wrap the expansion ring together.
B) The end part of the flat bag body filter cloth is wrapped with the expansion ring through at least two times of inward turning or outward turning, or the folded bag body filter cloth is wrapped with the expansion ring through inward turning or outward turning to form a bag opening.
The end part of the flat bag body filter cloth is turned over at least twice (turned inwards or outwards) to wrap the expansion ring to form a bag opening. Preferably, the end part of the flat bag body filter cloth is turned inwards twice, after the end part of the bag body filter cloth is turned inwards for the first time, the expansion ring is placed into the bag body for expansion, then the end part of the bag body is turned inwards again, and the expansion ring is wrapped to form a bag opening;
or the bag body of the folded filter bag is formed by tightly pressing and sewing the wavy folds at the end part of the filter cloth of the folded bag body for shaping, and then wrapping the expansion ring in an inward turning or outward turning mode to form the bag opening.
The definitions for the nouns in the above paragraph are as follows:
bag opening: the opening end of the dust-removing filter bag is provided with a structural part which has the function of expanding the filter bag tightly and sealing the filter bag on the pattern plate by filtered gas and an internal expansion ring.
A bag body: the middle cylindrical part of the filter bag, except the bag opening and the bag bottom, is used for carrying the main filtering work.
Bag bottom: the closed end of the dust-removing filter bag is used for plugging the cylindrical bag body to form a bag-shaped filter bag part.
End of the bag body filter cloth: the bag body participates in the part for manufacturing the bag opening structure.
Expanding rings: the filter cloth at the bag mouth is expanded and sealed on the hole of the pattern plate, and an elastic steel ring (also called as a surface strip, which is a conventional part in the industry) made of a thin steel strip is used.
Bag opening cloth: and the other cloth is used for wrapping the fixed expansion ring and is connected with the end part of the bag body filter cloth. The cloth of the bag opening cloth needs to select materials suitable for working conditions, and the materials for manufacturing the dust removal filter bag are preferably used.
The inward turning or outward turning of the end part of the bag opening cloth or the bag body filter cloth is defined as follows: after the end part of the bag opening cloth or the bag body filter cloth is made into a cylindrical shape, one end of the cylindrical opening is turned inwards towards the central axis direction and turned outwards away from the central axis direction by taking the central axis of the end part as a reference.
The bag mouth cloth and the end part of the bag body filter cloth are wrapped with an expansion ring together: and in a plane space where the radial expansion acting force of the expansion ring in the bag opening is positioned, bag opening cloth and the end part of the bag body filter cloth exist simultaneously, namely the bag opening cloth and the end part of the bag body filter cloth are wrapped by the expansion ring together.
The corrugated folds at the end part of the folded bag body filter cloth are compacted and sewn tightly to be shaped: the compaction and sewing tightly means that the wave-shaped folds are flattened and sewn and shaped, so that the end part of the bag body filter cloth forms a flat sheet-shaped form, the section of the bag body filter cloth forms a mode that 1 layer of cloth and 3 layers of cloth are alternated, and the shape of the 3 layers of cloth is flat omega-shaped as shown in figure 1.
The expansion ring inside the bag opening gives a tension force in the horizontal direction to the end part of the bag opening cloth and/or the bag body filter cloth on the outer side of the bag opening, and the expansion ring is extruded to the hole of the card plate so as to fix the filter bag and enable the assembly of the filter bag and the card plate to achieve a sealing state. However, when the filter bag is used for cleaning dust, the filter bag is impacted by airflow, and the airflow enters from the bag opening and directly reaches the bottom of the bag. At the moment, the dust-removing filter bag can be subjected to downward impact force, the effect of fixing the dust-removing filter bag by only depending on the expansion force of the expansion ring on the bag opening is poor, and the falling-off condition of the dust-removing filter bag is easy to occur. Therefore, in order to effectively fix the dust-removing filter bag and prevent the dust-removing filter bag from falling off, a clamping strip can be added at the bag opening, the clamping strip at the bag opening is arranged at the circumference of the ring in the width range of the expansion ring, the filter bag is arranged above and/or below the card plate hole, when the bag opening falls, the clamping strip can provide upward supporting force for the bag opening, and the dust-removing filter bag is prevented from falling off
The clamping strip is made of a material which can adapt to working conditions and has proper strength, the length of the clamping strip is determined by the perimeter of the opening of the bag, and the width of the clamping strip is smaller than that of the expansion ring. In order to ensure that the clamping strip has enough thickness, thicker filter cloth or a plurality of filter cloths which are overlapped and sewn together can be selected. Preferably, the material for manufacturing the filter bag can be used for manufacturing the clamping strip, the length of the clamping strip is close to the perimeter of the opening of the bag, the width of the clamping strip is 2-20 mm, and the thickness of the clamping strip is 2-15 mm.
The clamping strip can be arranged on the inner side or the outer side of the end part of the bag body filter cloth in a circumferential direction in a sewing mode; the cloth can also be arranged on the inner side or the outer side of the pocket opening cloth in a sewing mode; the clamping strip can be bonded on the outer side of the expansion ring by using adhesive glue, or the sizes of the clamping strip and the expansion ring are controlled, so that the mutual acting force of the circular clamping strip and the expansion ring is increased and the clamping strip and the expansion ring are tightly assembled together.
When a bag opening of a pleated filter bag is manufactured, pleats at the end part of pleated filter cloth are compacted and sewn tightly, on the compacted and sewn filter cloth, a position where no pleat is sewn is a single-layer filter cloth, and a position where a pleat is sewn is a three-layer filter cloth.
When the dust removal filter bag works, the bag opening of the dust removal filter bag needs to be installed and fixed in a pattern plate hole (the pattern plate hole is a circular/elliptical/oblate hole with the same size on the pattern plate of the dust removal chamber and the air purification chamber divided by the dust remover). The expansion ring in the bag opening extrudes and expands the folded bag body filter cloth compacted and sewn on the outer side of the bag opening onto the side wall of the pattern plate hole so as to fix the dust removal filter bag. If the bag opening cloth outside the expansion ring is inconsistent in thickness, some positions are single-layer filter cloth, and some positions are three-layer filter cloth, the extrusion force of the expansion ring to the bag opening cloth is uneven, and the fixing effect is reduced. And the expansion ring has poor extrusion and expansion force on the single-layer filter cloth, so that the single-layer filter cloth cannot be extruded tightly, and a gap is formed between the single-layer filter cloth and the side wall of the pattern plate hole. And the space for filtering dust is arranged below the pattern plate holes, and the dust is easily discharged through the gaps, so that the filtering performance of the dust removal system is influenced. Therefore, the filling material is required to be arranged at the position of the single-layer filter cloth at the bag opening, so that the thickness of the filling material is the same as that of the three layers of filter cloth at the bag opening.
The filling material can be selected from cloth which is in accordance with working conditions and has proper strength and thickness. The length and the width of the filling material are determined by the size of the single-layer filter cloth at the end part of the bag body where the folds are sewn, and the thickness of the filling material is required to be not less than the thickness of the single-layer filter cloth. Preferably, the filter cloth for manufacturing the pleated filter bag is selected to be manufactured, the two filter cloths are sewn together, the filling cloth is cut according to the size of the single-layer filter cloth at the bag opening, and the two filter cloths are sewn together to manufacture the filling material with the thickness of the two layers of filter cloth.
The filling material is fixed on the inner side or the outer side of the bag mouth single-layer filter cloth in a sewing or gluing mode.
If the hole of the pattern plate is made into an inward convex concave shape to adapt to the situation that the position where no fold part is sewn on the end part of the compacted and sewn bag body filter cloth is a single-layer filter cloth and the position where the fold part is sewn is a three-layer filter cloth, the filling material is not needed any more.
One of the reasons that the bag mouth of the folded filter bag is difficult to be made into a flat bag mouth is that: the number of the filter cloth layers outside the flat bag opening expansion ring is small, and the number of the filter cloth layers outside the folded filter bag opening expansion ring is large, so that the manufacture is complicated, and the effect is poor. When a bag mouth of the folded filter bag is manufactured, the number of layers of external materials of the expansion ring needs to be reduced as much as possible. The term "material" as used herein refers to the end of the bag body filter cloth or/and the bag opening cloth, and the filling material.
Therefore, the pocket cloth and the filling material can be made of one piece of cloth, and the shape of the cloth is cut, so that the cut cloth plays a role of filling the space in the single-layer cloth, can be turned inwards or outwards to wrap the expansion ring and plays a role of fixing the expansion ring.
And (3) integrating the bag opening cloth and the filler into a piece of dual-purpose cloth according to the size and thickness requirements of the single-layer filter cloth and the size requirement of the bag opening cloth wrapping expansion ring. The dual-purpose cloth is made by using one piece of cloth or by cutting the cloth separately and then connecting the cut cloth together. And sewing the filling part on the manufactured dual-purpose cloth to the inner side of the single-layer filter cloth at the bag opening, putting the expansion ring into the bag opening cloth, turning the bag opening cloth part on the dual-purpose cloth inwards or outwards to wrap the expansion ring, and sewing the bag opening cloth on the bag body filter cloth by a sewing method to finish the manufacture of the bag opening.
The bag opening cloth and the filling cloth are made into a whole to form the dual-purpose cloth, so that the filling material on one side of the outer side of the original expansion ring can be eliminated, the manufacturing steps are simplified, and the manufacturing difficulty is reduced.
Similarly, in order to simplify the manufacturing steps of the bag opening of the dust-removing filter bag and reduce the manufacturing difficulty, the clamping strip and the bag opening cloth can be integrated into a dual-purpose cloth. When the clamping strips and the bag opening cloth are made into dual-purpose cloth, one piece of filter cloth can be used for manufacturing, the length of the filter cloth is determined by the perimeter of the bag opening, the width of the filter cloth is larger than that of the expansion ring, one end of the long edge of the filter cloth is turned over at least once and is sewn, the clamping strips with the thickness of at least two layers of filter cloth are formed on one edge of the filter cloth, and the rest parts of the filter cloth are used as. The parts of the clamping strips in the manufactured dual-purpose cloth are sewn on the inner side or the outer side of the bag opening filter cloth, and then the rest bag opening cloth parts are turned inwards or outwards to wrap the expansion rings to form bag openings.
When the clamping strip is arranged on the outer side of the end part of the bag body filter cloth of the bag opening, in order to improve the sealing effect of the bag opening, outer wrapping cloth can be arranged outside the clamping strip.
The outer wrapping cloth arranged outside the bag opening is a single-layer cloth and can be made into a cylinder shape to be sleeved outside the bag opening. The length of the outer wrapping cloth is determined by the perimeter of the opening of the bag, and the width of the outer wrapping cloth is 15mm to 100 mm. The outer wrapping cloth is arranged on the outer side of the clamping strip in a sewing mode. The outer wrapping cloth is added, so that the sealing between the bag opening and the flower plate hole is changed into a sealing mode combining side sealing and surface sealing. And longitudinal seams which are easy to generate due to tight compaction seams at the end parts of the folded bag body filter cloth can be blocked.
The outside of the bag body of the pleated filter bag is usually provided with a shroud band, so that the filter bag is prevented from being collided and abraded due to the outward movement of the pleated part of the bag body during blowing ash removal, and the position of the pleat of the filter bag is positioned. When the shroud ring is fixed on the bag body by using a sewing method, a pinhole is generated, and a dust exhaust passage is increased. Therefore, the enclosing belt is fixed on the bag body in a glue bonding mode, but the adhesive glue is easy to lose efficacy, and the problem that the enclosing belt falls off is caused. The hanging strip can be added on the filter bag, the hanging strip and the bag body of the filter bag are arranged in a flat shape and are connected with the surrounding belt on the bag body in a sewing mode, and the position of the surrounding belt is fixed.
The hanging strip is made of materials suitable for working conditions, and preferably, the materials for making the filter bag can be selected. The length of the sling is determined by the length of the filter bag, and the width of the sling is not less than 5 mm. At least one sling is arranged on the filter bag, and one end of the sling is arranged on the single-layer filter cloth at the bag opening in a sewing or gluing mode; or the outer side of the bag opening is provided with an outer wrapping cloth, and the hanging strip is arranged on the outer wrapping cloth at the bag opening in a sewing or gluing mode.
When the bag mouth of the flat bag body is manufactured, the clamping strip and the bag mouth cloth can be integrated into a whole. When the clamping strips and the bag opening cloth are made into dual-purpose cloth, one piece of filter cloth can be used for manufacturing, the length of the filter cloth is determined by the perimeter of the bag opening, the width of the filter cloth is larger than that of the expansion ring, one end of the long edge of the filter cloth is turned over at least once and is sewn, the clamping strips with the thickness of at least two layers of filter cloth are formed on one edge of the filter cloth, and the rest parts of the filter cloth are used as.
After the expansion ring is expanded, the opening of the cloth for wrapping the expansion ring is generally sealed by sewing or gluing, and the expansion ring is fixed.
When the opening of the pleated filter bag is manufactured, if the opening is wrapped by the expansion ring in an inward turning or outward turning mode through the filter cloth at the end part of the pleated bag body, the contact part of the opening end part of the filter bag, which is completely wrapped by the expansion ring after being turned, and the end part of the bag body is provided with glue, and the filter bag opening and the glue are bonded together; if the bag opening is formed by connecting bag opening cloth with the end part of the bag body filter cloth, after the bag opening cloth is turned over and completely wraps the expansion ring, sewing threads or adhesive glue are arranged on the bag opening cloth, the end part of the bag body filter cloth and the outer wrapping cloth (if any) forming the bag opening, so that the expansion ring is fixed to form the bag opening.
When the opening of the flat bag is manufactured, if the opening is formed by connecting bag opening cloth with bag body filter cloth, the bag opening cloth is turned over to completely wrap the expansion ring, and the end parts of the bag opening cloth and the bag body filter cloth forming the opening are sewn by sewing threads or bonded by adhesive, so that the expansion ring is fixed to form the opening.
After the bag mouth of the pleated filter bag or the flat bag filter bag in the invention is clamped into the pattern plate hole, pinholes generated by sewing on the bag mouth cannot appear below the pattern plate hole (the part of the dust-removing filter bag positioned below the pattern plate hole bears the dust filtering work, and the part of the pattern plate hole and the dust-removing filter bag positioned thereon does not bear the dust filtering work and only plays a role of fixing), and the pinholes cannot become a dust exhaust channel. On the other hand, the expansion ring can completely eliminate cloth seams among multiple layers of filter cloth at the bag opening, so that the problem of cloth seam dust exhaust at the bag opening is avoided.
The bag mouth part of the dust-removing filter bag in the invention eliminates the problems of pinholes and cloth-seam dust exhaust channels of the bag mouth of the dust-removing filter bag manufactured by the traditional method, greatly improves the filtering performance of the dust-removing filter bag and improves the dust-removing performance of the whole system of the dust remover. Has positive significance for reducing the emission of industrial dust and protecting the environment.
Drawings
Fig. 1 is a cross-sectional view of the end of the pleated bag body after tube forming.
Fig. 2 is a schematic view of the filling material and the bag opening cloth.
FIG. 3 is a schematic view of the clip strip and the overwrap as a single unit.
Fig. 4 is a schematic cross-sectional view of the bag opening after the expansion ring is placed.
Fig. 5 is a partial cross-sectional view at the mouth of the bag.
Fig. 6 is a partial cross-sectional view at the mouth of the bag.
Fig. 7 is a partial cross-sectional view at the mouth of the bag.
Fig. 8 is a partial cross-sectional view at the mouth of the bag.
Fig. 9 is a partial cross-sectional view at the mouth of the bag.
FIG. 10 is a schematic view of a partial sling of the bag body.
In the figure:
1-folding bag body end folding, 2-sewing thread, 3-folding bag body end single-layer filter cloth area, 4-folding bag body end three-layer filter cloth area, 5-pocket cloth, 6-filling material, 7-clamping strip, 8-outer wrapping cloth, 9-expanding ring, 10-pattern plate, 11-folding bag body end bonding glue, 12-hanging strip and 13-surrounding strip.
The specific implementation mode is as follows:
the following examples are illustrative only, and the present technology is not limited thereto.
Example 1
Firstly, compacting and tightly sewing the folded bag body end folds 1, and forming the folded bag body end fold 1 into a folded bag body end single-layer filter cloth area 3 and a folded bag body end three-layer filter cloth area 4 (shown in figure 1) by compacting and tightly sewing the folded bag body end folds 1.
The materials of the filling material 6 and the bag opening cloth 5 are selected to manufacture the dust-removing filter bag, the thickness of the filling material 6 is set to be two layers of filter cloth, and the filling material 6 and the bag opening cloth 5 are integrally distributed according to the size of the single-layer filter cloth 3 at the end part of the folded bag body and the size of the expansion ring 9 (as shown in figure 2).
The material of the clamping strip 7 and the material of the outer wrapping cloth 8 are both selected to be used for manufacturing the dust-removing filter bag, and the thickness of the clamping strip 7 is set to be two layers of filter cloth. The circumferences of the clamping strips 7 and the outer wrapping cloth 8 are determined according to the circumference of the filter cloth at the end part of the bag body after the folds are sewed. The clamping strip 7 can be sewn on the outer side of the pleat 1 at the end of the pleated bag body (as shown in fig. 3).
The filling material 6 and the bag opening cloth 5 are made into an integral cloth which is sewed on the inner side of the end part 1 of the folded bag body; and then overlapping the folded bag body into a tube. And (3) placing the expansion ring into a bag opening for tensioning, turning the bag opening cloth 5 inwards to wrap the expansion ring 9 (as shown in figure 4), sewing the outer wrapping cloth 8 into a cylindrical sleeve outside, and finally sewing the edge of the end part of the bag opening cloth 5 turned inwards, the edge of the end part of the folded bag body folded 1 after being compacted and sewn and the edge of the outer wrapping cloth 8 by using sewing threads 2.
The schematic partial cross-sectional view of the pleated dust filter bag with its mouth mounted on the card 10 is shown in fig. 5.
The hanging strip 12 is arranged on the bag body of the folded filter bag, the hanging strip 12 is sewn on the outer wrapping cloth 8, the hanging strip 12 is arranged in a flat shape with the bag body of the filter bag and is connected with the surrounding belt 13 on the bag body in a sewing mode, and the position of the surrounding belt 13 is fixed. The material of the bag is selected from the sling 12, the length of the sling 12 is consistent with the length of the bag body of the bag, the width of the sling 12 is set to be 20mm, and the bag body sling 12 is shown in figure 10.
Example 2
Firstly, compacting and tightly sewing folds 1 at the end part of a pleated bag body, and forming a single-layer filter cloth area 3 at the end part of the pleated bag body and a three-layer filter cloth area 4 at the end part of the pleated bag body by compacting and tightly sewing the folds 1 at the end part of the pleated bag body (as shown in figure 1).
The material of the filling material 6 is selected to manufacture the dust removal filter bag, the thickness of the filling material 6 is set to be two layers of filter cloth, and the size of the filling material 6 is determined according to the size of the single layer of filter cloth 3 at the end part of the folded bag body.
The material of the clamping strip 7 and the material of the bag opening cloth 5 are selected to be used for manufacturing the dust-removing filter bag, and the thickness of the clamping strip 7 is set to be three layers of filter cloth. The circumferences of the clamping strips 7 and the bag opening cloth 5 are determined according to the circumference of the filter cloth at the end part of the bag body after the folds are sewed. In order to simplify the manufacturing process, the clamping strips 7 and the bag opening cloth 5 are made of one piece of cloth and are made into an integral cloth. Firstly, the filling material 6 is sewed on the single-layer filter cloth 3 at the end part of the folded bag body at the inner side of the end part of the folded bag body. Next, a pocket cloth made of one piece of cloth and the clamp strip 7 are sewn on the inner side of the end part of the folded pocket body. And thirdly, after the end part of the folded bag body is formed into a cylinder, the expansion ring is placed into the bag opening to be tensioned. And finally, wrapping the bag opening cloth 5 with an expansion ring in a downward inward turning manner, and bonding the bag opening cloth in the downward inward turning manner and the bag body cloth together by using a wrinkled bag body end bonding glue 11 to form a bag opening.
The schematic partial cross-sectional view of the pleated dust filter bag with its mouth mounted on the card 10 is shown in fig. 6.
Example 3
Firstly, pressing and sewing the folded bag body end folds 1 into a folded bag body, and pressing the sewn folded bag body end folds 1 to form a folded bag body end single-layer filter cloth area 3 and a folded bag body end bag mouth cloth and filling material area 4 (as shown in figure 1).
The materials of the filling material 6 and the bag opening cloth 5 are selected to manufacture the dust-removing filter bag, the thickness of the filling material 6 is set to be two layers of filter cloth, and the filling material 6 and the bag opening cloth 5 are integrated according to the size of the single-layer filter cloth 3 at the end part of the folded bag body and the size of the expansion ring 9 (as shown in figure 2).
The material of the clamping strip 7 is selected to be used for manufacturing the dust-removing filter bag, and the thickness of the clamping strip 7 is set to be two layers of filter cloth. The circumference of the clamping strip 7 is determined according to the circumference of the filter cloth at the end part of the bag body after the folds are sewed.
The filling material 6 and the bag opening cloth 5 are made into an integral cloth which is sewed on the inner side of the end part of the folded bag body; sewing the clamping strip 7 on the inner side of the end part of the folded bag body; and then overlapping the folded bag body into a tube. After the expansion ring 9 is expanded into the inner side of the end part of the folded bag body of the formed tube, the bag opening cloth 5 is turned inwards to wrap the expansion ring 9. Finally, the end part of the bag opening cloth 5 turned inside out is sewed with the end part of the clamping strip 7 by the sewing thread 2.
The schematic partial cross-sectional view of the pleated dust filter bag with its mouth mounted on the card 10 is shown in fig. 7.
Example 4
And (3) manufacturing the bag opening of the flat bag dust removal filter bag, wherein the bag opening comprises bag opening cloth 5, an expansion ring 9, a clamping strip 7 and filter cloth at the end part of the bag body.
The material of the bag opening cloth 5 is selected to be used for manufacturing the dust removal filter bag, the length of the bag opening cloth 5 is determined by the circumference of the expansion ring 9, and in order to completely wrap the expansion ring 9 and sew the seal, the width of the bag opening cloth 5 is required to be more than 2 times of the width of the expansion ring 9.
The material of the clamping strip 7 is selected to manufacture the dust removal filter bag, the thickness of the clamping strip 7 is selected to be the thickness of two layers of filter cloth, the perimeter of the clamping strip 7 is determined by the perimeter of the expansion ring 9, the clamping strip 7 is arranged on the bag opening cloth, and the clamping strips after being arranged in the pattern plate are positioned above and below the pattern plate holes.
After the bag opening cloth 5 with the clamping strips 7 arranged on the outer side is completely wrapped by the expansion ring 9, the bag opening cloth and the expansion ring 9 are expanded into the end part of the flat bag body together, and then sewing threads are arranged on the edge of the upper side of the bag opening cloth 5 and the edge of the end part of the flat bag body for sewing to form a bag opening.
The schematic partial cross-sectional view of the pleated dust filter bag with its mouth mounted on the card 10 is shown in fig. 8.
Example 5
And (3) manufacturing the opening of the flat bag dust removal filter bag, wherein the opening comprises an expansion ring 9, a clamping strip 7 and filter cloth at the end part of the bag body.
The material of the clamping strip 7 is selected to manufacture the dust removal filter bag, the thickness of the clamping strip 7 is selected to be the thickness of two layers of filter cloth, the perimeter of the clamping strip 7 is determined according to the perimeter of the expansion ring 9, the clamping strip 7 is arranged on the end part of the filter cloth of the bag body, and the clamping strip is positioned above the card plate after being clamped into the card plate.
The end part of the flat bag body filter cloth after being formed into a cylinder is folded twice to wrap an expansion ring 9, and the upper side of the bag opening is provided with a sewing thread 2 for sealing to form the bag opening.
The schematic partial cross-sectional view of the pleated dust filter bag with its mouth mounted on the card 10 is shown in fig. 9.
Claims (10)
1. A dust removal filter bag comprises a bag opening, a bag body and a bag bottom, and is characterized in that the bag opening adopts one of the following forms:
A) the bag mouth cloth and the end part of the bag body filter cloth are jointly wrapped with an expansion ring to form a bag mouth;
B) the end part of the flat bag body filter cloth is wrapped with an expansion ring through at least two inward turning or outward turning, or
The bag body filter cloth is folded to be turned inwards or outwards to wrap the expansion ring to form a bag opening;
the bag body is a folded bag body or a flat bag body.
2. The dust removing filter bag according to claim 1, wherein: the bag mouth is provided with a clamping strip which is sewn on the end part of the bag body filter cloth or the bag mouth cloth or is adhered/tightly assembled on the expansion ring.
3. The dust bag according to claim 1 or 2, wherein: the end parts of the folded bag body filter cloth are folded to form single-layer and three-layer filter cloth, and at least one layer of filling material is arranged on the single-layer filter cloth.
4. The dust removing filter bag according to claim 3, wherein: the bag opening cloth and the filling material are integrated.
5. The dust removing filter bag according to claim 3, wherein: the clamping strip and the bag opening cloth are integrated.
6. The dust removing filter bag according to claim 3, wherein: when the clamping strip is arranged on the outer side of the folded bag body, the outer wrapping cloth is added.
7. The dust removing filter bag according to claim 3, wherein: at least one hanging strip is connected with the single-layer filter cloth.
8. The dust removing filter bag according to claim 6, wherein: at least one sling is connected on the outer wrapping cloth.
9. The dust removing filter bag according to claim 2, wherein: the clamping strip and the bag opening cloth are integrated.
10. The dust collection filter bag according to any one of claims 1 to 9, wherein: the sealing mode of wrapping the expansion ring cloth adopts a sewing method and/or an adhesive bonding method.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910654198.8A CN112295327A (en) | 2019-07-23 | 2019-07-23 | Dust removal filter bag |
| PCT/CN2019/111950 WO2021012427A1 (en) | 2019-07-23 | 2019-10-18 | Dust removal filter bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910654198.8A CN112295327A (en) | 2019-07-23 | 2019-07-23 | Dust removal filter bag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112295327A true CN112295327A (en) | 2021-02-02 |
Family
ID=74193147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910654198.8A Pending CN112295327A (en) | 2019-07-23 | 2019-07-23 | Dust removal filter bag |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112295327A (en) |
| WO (1) | WO2021012427A1 (en) |
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| Publication number | Publication date |
|---|---|
| WO2021012427A1 (en) | 2021-01-28 |
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