Internal fixing type wrinkled cloth bag

Abstract

The utility model relates to an internal fixing type wrinkled cloth bag which comprises a cloth bag body, fixing points are arranged on the inner wall of the cloth bag body, the number and the positions of the fixing points are matched with those of a bag cage, and the fixing points are fixedly pulled on an internal fixing device. The outer side of the bag cage is sleeved with the cloth bag body, and after sleeving, the inner fixing device pulls and fixes the inner wall of the cloth bag, so that wrinkles matched with the bag cage are formed on the cloth bag body; the inner belt is fixedly arranged at the star-shaped concave part of the wrinkled cloth bag, so that a regular wrinkled shape is conveniently kept after the bag cage is connected, dust is not hidden, an outer binding belt is canceled, hidden dust is reduced, the dust blowing effect is improved, the inner binding belt is thin, dust blowing in the filter bag is not influenced, the resistance of the dust remover is reduced, the structure is simple, the cost is low, and the practicability is high. The market popularization of the wrinkled cloth bag can be promoted.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a pleated cloth bag which can form pleats through internal fixation initially. Background Art

[0002] The pleated cloth bag, also called a star-shaped dust removal cloth bag, has concave parts and convex parts arranged alternately to form a star shape. The star-shaped convex parts and star-shaped concave parts are used to increase the filtration area. Using the pleated cloth bag can increase the filtration area by more than 50%. Compared with traditional cloth bags, the floor area is greatly reduced. The area of the cloth bag increases, and the filtration resistance is effectively reduced. With the same filtration area, due to the reduction of the number of filter bags, the consumption of steel is reduced, and the labor intensity is reduced.

[0003] To prevent the pleats from spreading, a drawstring is needed when using the current pleated cloth bag. Most of the current methods are to sew an external drawstring outside the cloth bag, and the external drawstring is fixed outside the cloth bag by sewing with the star-shaped convex part.

[0004] The external fixation of the drawstring has the following problems:

[0005] First, the drawstring is wide, the spacing is small, and the number is large. The drawstring is on the outside, which hinders the dusty gas from reaching the cloth bag. The external drawstring covers the outside of the filter bag, which is equivalent to reducing the filtration area.

[0006] Second, dust is likely to deposit here and is not easy to be blown off during soot blowing because the external drawstring will affect soot blowing during reverse soot blowing;

[0007] Third, the pleat shape is basically maintained by the drawstring, and the shape of the star-shaped concave part is irregular, with many protrusions and depressions.

[0008] Therefore, due to the large ineffective area and the disadvantage of being unfavorable for soot blowing, the market promotion of the pleated cloth bag is affected. Summary of the Utility Model

[0009] Aiming at the deficiencies of the prior art, the utility model provides an internally fixed pleated cloth bag, which can directly form pleats on the cloth bag when the cloth bag is sleeved, the star shape can be restored after soot blowing, and it has the advantage of good soot blowing effect.

[0010] The utility model is realized by the following technical solutions:

[0011] An internally fixed pleated cloth bag includes a cloth bag body. Fixed points are provided on the inner wall of the cloth bag body. The number and positions of the fixed points cooperate with the cage. The fixed points are fixedly pulled on the internal fixing device; the cloth bag body is sleeved outside the cage. After sleeving, the internal fixing device pulls and fixes the inner wall of the cloth bag, so that the cloth bag body forms pleats matching the cage.

[0012] Preferably, the internal fixing device is an elastic internal strap, and further includes a fixing strip. One end of the fixing strip is fixed to the elastic internal strap, and the other end is fixed to a fixing point on the inner wall of the cloth bag body.

[0013] Preferably, the internal fixing device is a hook fixed on the bag cage.

[0014] Preferably, the internal fixing device is a bag cage, the fixing point is connected to the fixing strip, and one end of the fixing strip is connected to the bag cage.

[0015] Preferably, a rigid bag cap is provided at the bottom of the cloth bag body.

[0016] Preferably, the bottom of the cloth bag body is star-shaped, and the bottom of the bag is pressed between a star-shaped bottom plate and a star-shaped pressing plate, and the star-shaped bottom plate and the star-shaped pressing plate are fixedly connected.

[0017] Preferably, the cloth bag body is multi-layered from the inside to the outside, and a catalyst is provided in the inner filter cloth.

[0018] The manufacturing method of the above-mentioned internally fixed corrugated cloth bag:

[0019] On a flat filter cloth, sew a cloth strip as a hanging point, and sew the filter cloth into a cylinder; sew the cloth bag mouth;

[0020] Insert the corrugated bag cage into the bag mouth, and the top of the bag cage is matched with the bag mouth; turn the inner wall of the cylinder upwards, with the hanging point on the outside, and the first-layer hanging point at the top is fixed to the elastic internal strap through one end of the fixing strip; turn the inner wall of the cylinder inwards by a part, and the second-layer hanging point at the top is fixed to the elastic internal strap through one end of the fixing strip; and so on, hang the hanging point and the elastic strap layer by layer; the bottom of the bag is pressed between the star-shaped bottom plate and the star-shaped pressing plate, and the star-shaped bottom plate and the star-shaped pressing plate are fixedly connected by bolts; the corrugated filter bag and the corrugated bag cage are assembled into one body, extend into the hole of the flower plate, and enter the dust removal box body; the bag mouth is stuck on the hole of the flower plate.

[0021] In this solution, a strap is fixedly provided inside the star-shaped recess. After being sleeved on the bag cage, the internal strap tightens the star-shaped bottom, realizing the shaping of the star-shaped recess, replacing the external strap to prevent the corrugations from spreading, completely avoiding dust accumulation at the strap, and avoiding damage to the cloth bag caused by the direct connection between the filter cloth of the cloth bag and the bag cage.

[0022] The internal strap is elastic, which is beneficial to tightening the filter bag and ensuring the accuracy of the star shape.

[0023] The internal strap is fixedly connected to the bag cage through the bag cage connecting rod, which is beneficial to fixing the internal strap and preventing it from shaking and affecting the service life of the filter bag.

[0024] The internal fixing ring is fixed on the bag cage and used as a supporting ring, that is, using the supporting ring as the internal fixing ring, the structure is compact.

[0025] The bottom of the corrugated cloth bag is a rigid bag cap, and the connection methods between the filter bag and the bag cap are: clamped tightly by a clamp, mechanically connected, and adhesively bonded.

[0026] The bottom of the corrugated cloth bag is star-shaped. The bottom of the bag is pressed between a star-shaped chassis and a star-shaped pressing plate, and the star-shaped chassis and the star-shaped pressing plate are fixedly connected by bolts. In this optimized solution, the bottom of the corrugated cloth bag is set as star-shaped, which is beneficial to increasing the flue gas flow area at the bottom of the bag, reducing the upward flow velocity of the air flow at the bottom of the bag, and pressing out a star-shaped bottom of the bag through the star-shaped chassis and the star-shaped pressing plate, making the shape of the bottom of the bag more reliable. The star-shaped chassis can be fixedly connected to the bottom of the bag cage.

[0027] The bottom of the corrugated cloth bag is adhesively bonded to the star-shaped chassis, and the bottom of the bag fits with the star-shaped chassis, and the bottom of the bag is shaped into a star shape through the star-shaped chassis.

[0028] The beneficial effects of the present utility model are: by fixedly arranging an inner strap in the star-shaped concave part of the corrugated cloth bag, it is convenient to maintain a relatively regular corrugated shape after being connected to the bag cage, without hiding dust. The outer strap is cancelled, reducing dust hiding and improving the soot blowing effect. The inner strap is thin and does not affect the soot blowing inside the filter bag, reducing the resistance of the dust collector. The structure is simple, the cost is low, the consumption of steel can be reduced, the floor area can be reduced, and the market promotion of the corrugated cloth bag can be promoted. Description of the Drawings

[0029] Figure 1 It is a schematic cross-sectional structure diagram of the corrugated cloth bag;

[0030] Figure 2 It is a schematic diagram of the connection between the corrugated cloth bag and the inner strap;

[0031] Figure 3 It is a schematic diagram of the connection between the corrugated cloth bag, the inner strap and the bag cage;

[0032] Figure 4 It is a schematic diagram of the inner strap being fixedly connected to the bag cage through the bag cage connecting rod

[0033] Figure 5 It is a schematic cross-sectional view of the connection between the corrugated cloth bag, the inner strap and the bag cage;

[0034] Figure 6 It is a top view of the star-shaped bottom of the corrugated cloth bag;

[0035] Figure 7 It is a schematic diagram of the star-shaped pressing plate and the star-shaped chassis pressing out the star-shaped bottom of the bag;

[0036] Figure 8 The filter cloth of the corrugated cloth bag has multiple layers, and a catalyst is provided in the inner filter cloth;

[0037] Figure 9 It is a schematic cross-sectional structure diagram of the corrugated cloth bag with a catalyst;

[0038] As shown in the figure:

[0039] 1. Cloth bag body, 2. Star-shaped cage, 3. Inner binding band, 4. Fixed strip, 5. Cage support rod, 6. Cage connecting rod, 7. Star-shaped top, 8. Support ring, 9. Cage vertical rib, 10. Cloth strip at the star-shaped bottom, 11. Star-shaped bottom, 12. Bag bottom, 14. Catalyst, 15. Star-shaped chassis, 16. Bolt, 17. Star-shaped pressure plate. Specific implementation manner

[0040] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific implementation manners.

[0041] An internally fixed corrugated cloth bag includes a cloth bag body 1, and at least one internal fixing ring is provided in the inner cavity of the cloth bag body 1 from top to bottom; the number of internal fixing rings can be selected according to the length of the cloth bag body 1. More can be set for a longer cloth bag, and fewer can be set for a shorter cloth bag, as long as the cloth bag body 1 can be pulled and fixed well from the inner wall. Figure 2 As shown.

[0042] Combined Figure 2-6 , the cloth bag body 1 is sleeved outside the cage, and fixing points are provided on the inner wall of the cloth bag body 1. When sleeved, the fixing points are fixed and pulled on the internal fixing ring through the fixed strip 4; after sleeving, the internal fixing ring pulls and fixes the inner wall of the cloth bag, so that the cloth bag body 1 forms corrugations matching the star-shaped cage 2.

[0043] The cage corresponding to this implementation scheme is preferably a star-shaped cage 2. In addition to the star-shaped cage 2, this solution can even be used without the star-shaped cage 2. A cylindrical cage can also be used. Because the pulling point is located inside the cage, it can solve the existing dust removal covering problem, and the cloth bag still remains flexible, and a dynamic effect of one inhalation and one exhalation can be achieved during reverse pulse jet cleaning.

[0044] In this solution, an internal fixing ring (the same is set for other cages as long as it is located inside the cage) is fixedly provided inside the concave part of the star-shaped cage 2. After being sleeved on the cage, the internal fixing ring band tightens the star-shaped bottom 11, realizing the shaping of the star-shaped concave part, replacing the outer binding band to prevent the corrugations from spreading, completely avoiding dust accumulation at the binding band, and avoiding damage to the cloth bag caused by the direct connection of the cloth bag filter cloth to the cage.

[0045] The specific fixing method is as follows:

[0046] The internal fixing ring is preferably an elastic inner binding band 3. The elastic material can tighten to form corrugations in the initial stage, which is beneficial to tightening the filter bag and ensuring the accurate star shape; and during reverse pulse jet cleaning, because the inner binding band 3 is located inside and has elasticity, the cloth bag can have a certain amount of movement, and the cleaning effect will not be affected.

[0047] The connection method between the inner binding band 3 and the cloth bag can adopt at least one or a combination of the following:

[0048] Direct fixing type: such as suture fixation;

[0049] Inner hanging device type: sew a cloth strip on the cloth bag, and the inner strap 3 is fixed to the cloth strip; set quick adhesion for adhesive fixation; set rivet buttons for rivet button connection and fixation.

[0050] The fixed point where the inner strap 3 is fixed to the inner wall of the cloth bag body 1 is a fixed point. The number and position of the fixed points cooperate with the star cage 2, that is, one fixed point is set at each star concave part, and matching folds are formed after pulling.

[0051] In this embodiment, the inner strap 3 and the cloth bag body 1 are connected by a fixing strip 4: one end of the fixing strip 4 is fixed to the fixing ring, and the other end is fixed to the fixed point on the inner wall of the cloth bag body 1; this fixing strip 4 can be made of cloth strip or iron wire, can be hook-shaped, and can be elastic.

[0052] The fixing method of the inner strap 3 and the cage is as follows: the inner fixing ring is located inside the cage strut 5 and is fixedly connected to the cage through the cage connecting rod 6. It is beneficial to fix the inner strap 3 and prevent it from shaking, which affects the service life of the filter bag.

[0053] In this embodiment, Figure 6 , the fixing ring is fixed on the cage and used as a support ring, and the strut is connected to the fixing ring, so the structure is compact.

[0054] The bottom 12 of the cloth bag body 1 is provided with a rigid bag cap; the bottom 12 of the cloth bag body 1 in this embodiment is star-shaped, and the bottom 12 is pressed between the star-shaped bottom plate 15 and the star-shaped pressing plate 17, and the star-shaped bottom plate 15 and the star-shaped pressing plate 17 are fixedly connected, Figure 7 As shown, it is fixed by bolts 16 in this embodiment. This optimized solution sets the bottom 12 of the corrugated cloth bag to be star-shaped, which is beneficial to increasing the flue gas flow area at the bottom 12, reducing the upward flow velocity of the air flow at the bottom 12, pressing out the star-shaped bottom 12 through the star-shaped bottom plate 15 and the star-shaped pressing plate 17, and the shape of the bottom 12 is more reliable. The star-shaped bottom plate 15 can be fixedly connected to the bottom of the cage.

[0055] The bottom 12 of the corrugated cloth bag is star-shaped and is sewn, which is beneficial to increasing the flue gas flow area at the bottom 12 and reducing the upward flow velocity of the air flow at the bottom 12. The bottom 12 is pressed between the star-shaped bottom plate 15 and the star-shaped pressing plate 17, and the star-shaped bottom plate 15 and the star-shaped pressing plate 17 are fixedly connected by bolts 16. The cooperation of the bolts 16 and nuts plays a role in pressing the star-shaped bottom plate 15, the star-shaped pressing plate 17 and the filter cloth at the bottom 12. At the same time, the bottom of the filter cloth cylinder is shaped into a star shape and does not leak ash. Optionally, gaskets are added to the star-shaped bottom plate 15, the star-shaped pressing plate 17, and the filter cloth to increase the sealing performance. The star-shaped bottom can be only paired with the star-shaped pressing plate 17 and bonded.

[0056] The cloth bag body 1 has multiple layers from the inside out, and a catalyst 14 is provided in the inner filter cloth. Figure 8 as shown.

[0057] In this embodiment, the pleated cloth bag filter cloth has multiple layers. The outer filter cloth is used for soot filtration, and the inner filter cloth contains a catalyst 14. According to different types of the catalyst 14, it is respectively used for removing NOX, dioxins, etc. The multiple filter cloths can be tightly connected, such as needle punching connection. It can also be loosely connected, such as fixing the inner filter cloth by using a cage and attachment points. When blowing ash from inside the cloth bag, the high-speed air blows the inner filter cloth and transmits the vibration to the outer filter cloth; due to the high air permeability of the inner filter cloth, the high-speed air will also pass through the inner filter cloth to reach the outer filter cloth; to ensure the ash removal of the outer dust removal filter cloth. The service lives of the outer dust removal filter cloth and the inner catalyst 14 filter cloth are different. Using loose connection, they can be separately disassembled and replaced respectively, which is beneficial to cost reduction. Separately removing the inner catalyst 14 filter cloth is convenient for the regeneration of the catalyst 14.

[0058] A girdle is fixedly arranged inside the star-shaped recess of the pleated cloth bag. After being sleeved on the cage, the inner girdle tightens the star-shaped bottom 11 to realize the shaping of the star-shaped recess, replacing the outer girdle to prevent the pleats from spreading, completely avoiding ash accumulation at the girdle, and basically not affecting the internal ash blowing.

[0059] When the cloth bags are assembled, the following two methods can be adopted

[0060] Method 1: First, do not install the girdle. At this time, the filter bag has no pleats and has a large diameter, and one can reach into the filter bag. If the filter cloth is turned over, it is even easier to reach in for operation. The cage has a support ring 8 and support rods. The cage is inserted into the filter bag without pleats, and one reaches in to connect the first-layer girdle with the inner hanging device of the cloth bag (or connection methods such as wire winding or riveting, etc.). Then the second layer, the third layer, etc. are connected layer by layer. Then the bag mouth is made. The bag bottom 12 is made. The manufacturing methods of the bag mouth and the bag bottom 12 are: sewing, bonding, capping, and pressing with a bag cap.

[0061] Method 2: First, install the girdle to form a pleated cloth bag. The cage does not install the support ring 8 and support rods. The vertical ribs 9 of the cage are inserted into the pleated filter bag to support the star-shaped top 7, so that the inner girdle does not hinder the insertion of the vertical ribs 9 of the cage. A pleated filter bag is formed. It is applicable to shorter filter bags and cages where the support ring 8 and support rods of the cage can be installed later. The bag bottom 12 and the bag mouth can be manufactured first or later. The manufacturing methods of the bag mouth and the bag bottom 12 are: sewing, bonding, lining, and pressing with a capping.

[0062] The above description applies not only to circular cloth bags but also to cloth bags of various shapes. A filter cloth, a filter screen, or a metal fiber felt can be used. The technical features not described in the present utility model can be achieved by or adopted from the prior art, and will not be elaborated herein. The above embodiments and the accompanying drawings are only used to illustrate the technical solutions of the present utility model and are not intended to limit the present utility model. The present utility model has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present utility model do not depart from the purpose of the present utility model and should also fall within the scope of protection of the claims of the present utility model.

Claims

1. An internally fixed pleated cloth bag, comprising a cloth bag body (1), characterized in that: The inner wall of the bag body (1) is provided with fixing points, the number and position of the fixing points match the bag cage, and the fixing points are fixedly pulled on the internal fixing device; the bag body (1) is sleeved on the outside of the bag cage, and after sleeved, the internal fixing device pulls and fixes the inner wall of the bag, so that the bag body (1) forms folds that match the bag cage.

2. The internally fixed pleated cloth bag according to claim 1, characterized in that: The inner fixing device is an elastic inner belt (3), which also includes a fixing strip, one end of which is fixed to the elastic inner belt (3), and the other end is fixed to a fixing point on the inner wall of the bag body (1).

3. The internally fixed pleated cloth bag according to claim 1, characterized in that: The internal fixing device is a hook fixed on the bag cage.

4. The internally fixed pleated cloth bag according to claim 1, characterized in that: The internal fixing device is a bag cage, the fixing point is connected to the fixing strip, and one end of the fixing strip (4) is connected to the bag cage.

5. The internally fixed pleated cloth bag according to claim 1 or 2, characterized in that: The bag bottom (12) of the cloth bag body (1) is provided with a rigid bag cap.

6. The inner fixed pleated cloth bag according to claim 1, characterized in that: The bag bottom (12) of the cloth bag body (1) is star-shaped, and the bag bottom (12) is pressed between a star-shaped bottom plate (15) and a star-shaped pressure plate (17), and the star-shaped bottom plate (15) and the star-shaped pressure plate (17) are fixedly connected.

7. The internally fixed pleated cloth bag according to any one of claims 1 or 6, characterized in that: The bag body (1) is multi-layered from the inside to the outside, and a catalyst (14) is arranged in the inner filter cloth.

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