CN201586445U

CN201586445U - Back-blowing filter bag

Info

Publication number: CN201586445U
Application number: CN200920213987XU
Authority: CN
Inventors: 孙寒菊
Original assignee: Baosteel Development Co Ltd
Current assignee: Baosteel Development Co Ltd
Priority date: 2009-11-20
Filing date: 2009-11-20
Publication date: 2010-09-22
Anticipated expiration: 2019-11-20

Abstract

A back-blowing filter bag comprises a cylindrical bag body surrounded by filter cloth, openings at the upper end and lower end of the bag body are an upper bag opening and a lower bag opening respectively, the upper opening of the bag body turns outwards, the outer flanging further folds inwards, the folded outer flanging is sewed with the bag body through threads to form a ring cavity, a spring expansion ring is arranged in the cavity, the upper ends and the lower ends of ring-shaped wrapping cloth at the inner and outer layers are sewed with the bag body, an anti-collapse ring is arranged in a ring cavity formed by the two layers of the ring-shaped wrapping cloth, the lower bag opening of the bag body turns outwards, the outer flanging is sewed with the bag body through threads to form a circle of ring cavity, a glass fiber tension rope is arranged in the cavity, and the filter cloth is glass fiber filter cloth. The utility model adopts the glass fiber filter cloth as the filter material, so that the dedusting effect of the back-blowing filter bag is further reinforced, the problems that the filter bag is easily damaged in use owing to characteristics of the glass fiber filter yarn and the severe working environment and other problems are solved, the structure is firm, and the service time of the product is prolonged.

Description

A kind of anti-bleed type filter bag

Technical field

The utility model relates to a kind of blowback wind deduster, relates in particular to the filter bag of deduster.

Background technology

Anti-bleed type filter bag is installed in the anti-bleed type deduster, and its function is that the particle in the high temperature dust gas is effectively tackled, and the dust content that filters in the gas of back is controlled in the effective range.Back filter bag end opening and short tube are installed are fixed in the ash bucket top, top is fixed on the drop in beam with the spring hitch, makes filter bag be in tensioning state.During filtration, cloth bag is in the drum type attitude, and the dust-laden particle is adsorbed on the cloth bag inboard, and clean gas is discharged by the cloth bag outside.

Used anti-bleed type filter bag is many to be made by natural fiber and/or synthetic fibers filter cloth, comprise upper bag mouth cloth, lower bag mouth cloth, bag body, packing, shrinking-proof ring, cinch cord, wherein, the upper and lower end of upper and lower sack cloth of annular make respectively barrel-type bag that filter cloth surrounds on one's body, on the lower open end, the toroidal cavity that forms between upper bag mouth cloth and bag body is used to place circumferential ring expander, the toroidal cavity that forms between lower bag mouth cloth and bag body is used to place cinch cord, and bag also is fixed with several passive shrinking-proof rings with infantees on one's body.

Glass fiber filter material can satisfy the serviceability temperature of deduster because have good heat-resistance and chemical stability, and running resistance is low, deashing property is better, is the desirable filtrate of handling water capacity height, temperature height, the chemical composition that is corrosive flue dust.But because the coherent of glass fiber yarn, flexible resistance are less than natural fiber and synthetic fibers, the working environment of filter bag is poor simultaneously, under the effect of air-flow, filter bag is in the shake for a long time, if filter bag still adopts existing structure, can cause that easily throw off the suture site, the glass fiber yarn easy fracture, the damaged speed of filter bag is very fast, obstacle can appear in cleaner, influences filter efficiency.

The utility model content

Technical problem to be solved in the utility model is to provide a kind of sound construction of being made by glass fibre, the anti-bleed type filter bag of long service life.

The utility model is achieved through the following technical solutions:

A kind of anti-bleed type filter bag comprises the barrel-type bag body that is surrounded by filter cloth, it is characterized in that:

The upper and lower end opening of described bag body is respectively upper bag mouth, lower bag mouth;

The upper bag mouth of bag body turns up, and flanging inwardly folds into again, and the flanging after folding into is sewed up by line and bag body, forms a circle toroidal cavity, has inserted circumferential ring expander in the cavity;

The upper/lower terminal of inside and outside two-layer annular infantees is sewed up with the bag body, has inserted shrinking-proof ring in the toroidal cavity that forms between upper strata annular infantees and the lower floor's annular infantees;

The lower bag mouth of bag body turns up, and flanging inwardly folds into again, and the flanging after folding into is sewed up by line and bag body, forms a circle toroidal cavity, has inserted the glass fibre cinch cord in the cavity;

Described filter cloth is a glass filter cloth.

Last lower bag mouth is directly made by bag body filter cloth and is formed, and can reduce the operation of making sack in addition, increases the fastness of sack; Sew up with the bag body again after the outer rotating edge of sack inwardly folds into, can prevent from that filtrate is loose to open, this position cracky not behind the finished product, flanging has guaranteed the aesthetics of product inwardly simultaneously; Shrinking-proof ring places the centre of two-layer annular infantees, make the covering that annular infantees is all arranged inside and outside it, the outer annular infantees can play a protective role to shrinking-proof ring, prevent that the collision friction between the shrinking-proof ring damages shrinking-proof ring in the work, internal layer annular infantees can prevent on the shrinking-proof ring burr and the friction between the bag body filtrate, damage a bag body filtrate, the bag body is shielded; Cinch cord adopts and the identical glass fiber material of bag body, reduces the wearing and tearing of cinch cord to the lower bag mouth position as much as possible.

Further, can wind with one circuit inside and outside on the stainless packing with shield, this is because after the filter bag installation, circumferential ring expander is stressed, fragile upper bag mouth and inboard bag body.Parcel one circle shield can reduce the friction between packing and the filtrate on packing, thereby reduces the damage of filtrate, the service time of prolongation filter bag; Can also increase the seal degree between sack and the CAP NUTS when making in addition.

Further again, upper and lower two-layer annular infantees and shield all adopt the glass filter cloth consistent with bag stature material to make better protection bag body.

The beneficial effects of the utility model are:

1. adopt glass filter cloth as filtering material, the dust removing effects of anti-bleed type deduster is further strengthened;

2. fundamentally solved filter bag that cause in use occurs because glass fibre filters the characteristic of yarn and operating environment is abominable cracky and variety of issue, filter bag structure is firm, makes obtain prolonging the service time of product.

Description of drawings

Fig. 1 is existing anti-bleed type filter bag structure figure

Fig. 2 is the utility model blowback wind filter bag structure figure

Fig. 3 is the structure chart of a kind of preferred version of the utility model blowback wind filter bag

Among Fig. 1-3: 1 is upper bag mouth, and 2 is the bag body, and 3 is upper strata annular infantees, and 4 is lower bag mouth, and 5 is circumferential ring expander, and 6 is lower floor's annular infantees, and 7 is shrinking-proof ring, and 8 is cinch cord, and 9 is shield, and 10 is upper bag mouth cloth, and 11 is lower bag mouth cloth.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

In Fig. 1～3, the dotted line on the filter bag is a suture.

Among Fig. 1, used anti-bleed type filter bag comprises upper bag mouth cloth 10, lower bag mouth cloth 11, bag body 2, circumferential ring expander 5, shrinking-proof ring 7, cinch cord 8, wherein, the upper and lower end of the upper and

lower sack cloth

10,11 of annular is made respectively on the barrel-type bag body 2 upper and lower opening ends that filter cloth surrounds, the toroidal cavity of upper

bag mouth cloth

10 and 2 formation of bag body is used to place circumferential ring expander 5, the toroidal cavity of lower

bag mouth cloth

11 and 2 formation of bag body is used to place cinch cord 8, also is fixed with several passive shrinking-proof rings 7 on the bag body 2.

Fig. 2 is the anti-bleed type filter bag of the utility model, comprise the cylindric bag body 2 that surrounds by glass filter cloth, the upper bag mouth 1 of bag body 2 outwards turns down, flanging inwardly folds into again, flanging after folding into is sewed up by line and bag body 2, form the cavity of a circle annular, inserted circumferential ring expander 5 in the cavity, the lower bag mouth 4 of bag body 2 outwards turns down, flanging inwardly folds into again, and the flanging after folding into is sewed up by line and bag body 2, forms the cavity of a circle annular, inserted cinch cord 8 in the cavity, cinch cord 8 is the glass fibre cinch cord.The upper/lower terminal of inside and outside two-layer annular infantees 3,6 is sewed up with bag body 2, has inserted shrinking-proof ring 7 in the toroidal cavity that forms between the two-layer annular infantees 3,6.

Fig. 3 is a kind of preferred version of the present utility model, is wound with a circle shield 9 on the circumferential ring expander 5, annular infantees 3,6, and shield 9 is the compound glass fiber filter cloth; Upper and

lower sack

1,4 outwards after the turnover, inwardly folds into again, can prevent from that filtrate is loose to open that this position cracky not behind the finished product has guaranteed the aesthetics of product simultaneously; Annular infantees 3,6 is by twice folding forming of monoblock annular filter cloth: to center line, doubling is once again according to center line for the shrinking-proof ring cloth after folding with each the inside doubling of annular filter cloth both sides along the axial length.Totally 4 layers of annular filter clothes after folding for twice, shrinking-proof ring places the centre of 4 metafiltration cloth, and the covering of two-layer filter cloth is all arranged up and down.

Claims

1. an anti-bleed type filter bag comprises the barrel-type bag body (2) that is surrounded by filter cloth, it is characterized in that:

The upper and lower end opening of described bag body (2) is respectively upper bag mouth (1), lower bag mouth (4);

The upper bag mouth (1) of bag body (2) turns up, and flanging inwardly folds into again, and the flanging after folding into is sewed up by line and bag body (2), forms a circle toroidal cavity, has inserted circumferential ring expander (5) in the cavity;

The upper/lower terminal of inside and outside two-layer annular infantees (3), (6) is sewed up with bag body (2), has inserted shrinking-proof ring (7) in the toroidal cavity that forms between upper strata annular infantees (3) and the lower floor's annular infantees (6);

The lower bag mouth (4) of bag body (2) turns up, and flanging inwardly folds into again, and the flanging after folding into is sewed up by line and bag body (2), forms a circle toroidal cavity, has inserted glass fibre cinch cord (8) in the cavity;

Described filter cloth is a glass filter cloth.

2. anti-bleed type filter bag according to claim 1 is characterized in that: described annular infantees (3), (6) are the compound glass fiber filter cloth.

3. anti-bleed type filter bag according to claim 1 is characterized in that: be wound with a circle shield (9) on the outer surface of described circumferential ring expander (5).

4. anti-bleed type filter bag according to claim 3 is characterized in that: described shield (9) is the compound glass fiber filter cloth.