JPS6391115A - Retainer for bag filter - Google Patents

Abstract

PURPOSE:To remarkably enhance the housing capacity of a bag filter for a dust collector housing by nearly making the cross-sectional shape of a retainer for the bag filter to an ellipse or an oval shape. CONSTITUTION:A ring for fitting the inlet edge part of the retainer for a bag filter is nearly made to an oval shape by bending and working one piece of bar. A guide cylinder 2 is fixed to the ring 1 for fitting. A joining rod 3 is made to a long-sized bar shape wherein the upper end part is fixed to the guide cylinder 2 and about eight pieces thereof are provided. Caps are fitted and fixed to the lower ends of the joining rods 3 and the whole body of the retainer R is fixed to a grid frame body having a nearly oval shape. Thereby the cross-sectional area of the oval-shaped retainer can be made small in comparison with a cylinder-shaped retainer, thereby the number to be housed in a dust collector housing can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a retainer for a bag filter used in a filter dust collector.

(Prior Art) As is well known, filter dust collectors are roughly divided into vertical and horizontal types, depending on the mounting direction of the bag filter, which is formed by inserting and supporting a filter cloth into a retainer having a cylindrical cross-sectional frame structure.
In the case of a vertical dust collector, a cell plate (bag filter support plate) is formed at the upper part of the dust collector housing song.
The cell plate is divided into an upper clean air chamber and a lower dust-containing air chamber. 1" The end side is suspended and supported vertically, and a blow tube is piped in either the front-rear direction or the left-right direction for each row of bag filters directly above the open end of the bag filter. In addition, in the case of a horizontal dust collector, a mounting hole is drilled in the vertical cell plate that divides the dust collector housing into left and right sides, and the open end side of the bag filter is attached to the hole. The bag filter is supported horizontally and has a structure in which a blow tube is piped to the side of the opening end of the bag filter, and this is used to collect dust from dust-containing air and to remove the collected dust from each filter row. I'm dealing with it.

In these cases, the bag filter B is constructed by fitting and supporting a filter cloth into a substantially cylindrical retainer whose mouth edge is cylindrical and whose main body is a regular octagonal lattice frame. As shown in FIG. 6(a), a bag filter B adjacent to a rectangular (or cylindrical) dust collector housing H is
They are arranged in grid-like positions with a predetermined distance A between them.

This spatial distance A between the filters is set based on the filter cloth performance, filter cloth diameter, dust collection effect and dust removal effect as a filter dust collector, etc. If it is narrowed more than necessary, high pressure will be adversely affected. When washing air is injected to shake off the dust collected on the filter cloth of the bag filter, the filter cloths formed by the injection of the backwash air come into contact with each other, and a pulsation phenomenon occurs in the direction of the tip of the filter cloth. Wave-3 = Dynamic phenomena are generated, there is no space for the dust to fall, and the dust removal efficiency of the shade is significantly reduced as it is absorbed again by the filter cloth of the adjacent bag filter row. .

(Problem to be Solved by the Invention) Therefore, in order to improve the efficiency without reducing the dust removal efficiency, if the retainer that inserts and supports the filter cloth has a substantially cylindrical structure, it is necessary to attach the bag filter to the dust collector housing. There are limits to the number of books that can be accommodated and storage efficiency.

By the way, in order to improve the dust collection effect without reducing the distance between the bag filters, it is effective to increase the surface area of the filters.

This can easily be achieved by increasing the diameter of the dust collector housing, increasing its volume as much as possible, and increasing the number of bag filters that can be accommodated. This requires a large installation space, which goes against the demands for reducing equipment costs and making the entire device smaller and more compact.

To this end, instead of increasing the size of the dust collector, it is conceivable to increase the surface area of the bag filter attached to a predetermined cell plate without changing the capacity of the housing of the dust collector. In this case, in order to increase the surface area of the filter cloth of the bag filter supported on a predetermined cell plate, it is more advantageous to use a filter cloth with a small diameter than to use a filter cloth with a large diameter. It is also clear that the circumference is proportional to 2R and the area is proportional to R2.

However, if the diameter of the filter cloth is made smaller than necessary, it becomes difficult for high-pressure backwash air to reach the tip of the filter cloth during backwashing from the injection nozzle of the blow tube, that is, when dust is removed. Therefore, the efficiency of brushing off the collected dust adsorbed on the filter cloth is significantly reduced.

(Means for Solving the Problems) Therefore, in the present invention, in a bag filter retainer in which a filter cloth is inserted and supported in a retainer having a cylindrical cross-sectional frame, one of the retainers at opposing positions of the retainer is provided. A bag filter retainer characterized by having one retainer width relatively narrow and the other retainer width being relatively wide, specifically, the cylindrical shape of the retainer is changed from the conventional distance from the center of the cylinder. is not a constant approximately cylindrical shape,
The frame is configured with a structure in which the width of the retainer is wide and narrow in the front and rear, left and right sides, and the retainer has a substantially oval shape, a substantially oval shape, a substantially elliptical shape, a substantially square oval shape, a substantially rectangular shape, etc., and an existing filter cloth having the outer circumferential length is fitted onto this retainer. On the premise that the bag filter can be inserted into the dust collector for use, it is possible to significantly increase the storage capacity of the bag filter in the Haunong dust collector, and to improve the storage efficiency. This invention was invented to effectively meet the need for smaller and more compact dust collector housings by significantly increasing efficiency.

Hereinafter, several preferred embodiments of the present invention will be described with reference to the accompanying drawings. .

(First Embodiment of Retainer) First, FIGS.
]), (c), 1 is a ring for attaching the edge of the retainer "-1", which is made by bending one bar to form the front and rear parts into a parallel shape 1a, and the left and right sides of the ring. semi-arc shape 1b
It has a roughly oval ring shape that has been curved into a shape, and
The retainer width M of the parallel portion 1a facing each other in the front and back is formed to be relatively narrow, and the retainer width N of the other circular arc portion 1b facing both the left and right sides thereof is formed to be relatively wide.

Reference numeral 2 denotes a guide cylinder fixed to the mounting ring 1, and has a substantially oval-shaped cylinder shape, with its front and rear sides curved into parallel surfaces 2a, and its left and right sides curved into semi-arc-shaped circular arc surfaces 2b. 3
is a long bar-shaped connecting rod whose upper end is fixed to the guide tube 2, and has a central position 3a on the parallel surface 2a side and positions 3 on both left and right sides.
1), 3c, and a total of 8 at the center position 3d on the arcuate surface 21] side.
There are about 100 books installed. Reference numeral 4 denotes reinforcing rings, which are arranged and fixed at appropriate intervals in the longitudinal direction of the connecting rod 3.Similarly to the mounting ring 1, a single bar is machined to 11111 mm so that the front and rear sides thereof are parallel to each other. It is formed into a shape 4a, and its left and right sides are bent into a half-arc shape 4b to form a substantially oval ring shape. Reference numeral 5 denotes a cap directly attached and fixed to the lower end of the connecting rod 3, and is in the form of a substantially oval-shaped lid, similar to the above-mentioned picking ring 1, guide tube 2, reinforcing ring 4, etc. In this way, the entire retainer R is configured into a substantially oval-shaped lattice frame with seven frames.

(Second embodiment of retainer) Next, as a second embodiment of the present invention, FIGS.
+3), as shown in
This is a case in which the frame has a cylindrical shape approximately elliptical, and one surface of the opposing position of the retainer R is an arcuate surface with a relatively large diameter, and the retainer width M is relatively narrow, and the other surface is a relatively small diameter. The retainer R has a substantially elliptical cross-section with a relatively wide retainer width N and a circular arc surface. Specifically, the mounting ring 1 and reinforcing ring 4 that make up the retainer R are made by bending a single bar to form the front and rear parts into arc shapes 1a and 4a with relatively large diameters. The left and right sides are formed into a substantially elliptical ring shape with relatively small diameter arcs 1a, 41), and the guide tube 2 has a rear portion 1i1i formed into a relatively large diameter arc portion 2a, The left and right sides are formed into a substantially circular cylinder shape with a relatively small diameter circular arc portion 2a,
Further, the lid shape of the cap 5 is also approximately elliptical. The other connecting rods 3 are arranged in substantially the same positional relationship as in the eleventh embodiment, and thus the entire retainer R is constructed as a frame in the form of a substantially elliptical lattice frame.

(Third Embodiment of Retainer) Furthermore, as a third embodiment of the present invention, FIGS.
As shown in b) and (c), the cylindrical shape of the retainer R for a Hegg filter is constructed into a substantially rectangular small 1'IJ shape, and one surface of the opposing position of the retainer R is a parallel surface. The retainer R has a relatively narrow retainer width M, and the other side is a chevron-shaped surface, and the retainer width N is relatively wide.

Specifically, the mounting ring 1 and reinforcing ring 4 that make up the retainer R are made by bending a single bar so that the front and rear parts thereof are parallel to each other 1a and 4a, and the left and right sides thereof are made into parallel shapes 1a and 4a. The guide tube 2 has a ring shape of a small T-11 shape bent into the shape 1a, 41), and the guide tube 2 has its front and rear surfaces parallel to each other.
The left and right sides of the cap 5 are formed into a cylindrical shape having a chevron-shaped surface 2al: a bent approximately small 'I'11 shape, and the lid form of the cap 5 is also approximately a small 'I'll-shaped rectangular shape.

The other connecting rods 3 are arranged in substantially the same positional relationship as in the first embodiment, and thus the entire retainer R is constructed as a frame in a substantially rectangular oval-shaped lattice frame.

(Fourth embodiment of retainer) Furthermore, as a fourth embodiment of the present invention, FIG.
(1) L As shown in (c), the cylindrical shape of the bag filter retainer R is constructed into a substantially rectangular frame, and one surface form of the opposing position of the retainer R is a parallel surface, and the retainer width M Let ν be a retainer R having a relatively narrow cross-section and a relatively wide retainer width N, the other being parallel to the retainer R having a relatively narrow cross section.

Specifically, the retainer ring 1 and the reinforcing ring 4 that make up the retainer R are made by bending a single bar to form the front and rear parts into parallel shapes 1a and 4a, and the left and right sides of the bar are bent. The guide tube 2 has a substantially rectangular ring shape bent into parallel shapes 1a and 41+, and the front and rear portions of the guide tube 2 are formed into parallel surfaces 211, and both left and right sides are also bent into parallel surfaces 2tI. The cap 5 has a rectangular cylinder shape, and the lid shape of the cap 5 is also approximately rectangular. Other connecting rods 3 differ from the first embodiment in that a total of eight connecting rods 3a, 31], 3c, and 3d are disposed in the front and rear at positions dividing the parallel surface 2a side of the guide tube 2 into three equal parts. The entire retainer R is constructed into a substantially rectangular lattice frame.

(Example of use) Then, a filter cloth F of a required diameter is inserted and supported in the bag filter retainer R of the fourth embodiment shape, and the open end of this bag filter B is inserted into the bag filter retainer R of the fourth embodiment shape. It is rolled into the mounting ring 1 and formed as shown in Fig. 5(a).
, (b), and (c). In the figure, 6 is a cell plate that divides the dust collection chamber I4 into a clean air chamber 7 side and a dust-containing air chamber 8 side, and in the case of a vertical dust collector, the upper part of the dust collector housing l] is formed horizontally, and in the case of horizontal dust collectors,
It is formed in the vertical direction of the dust collector housing H.

9 is a mounting hole formed in a grid-like position of the cell plate 6, and 10 is an inner cylinder fixed to the mouth edge of the through hole 9. It is formed into a square, oval shape, rectangular shape, etc.

11 is a mounting bolt fixed to the cell plate 6 at the peripheral edge of the through hole 9; 12 is an annular clamp plate;
The opening is formed in a square, oval shape, rectangular shape, etc., and the outer peripheral edge thereof is curved toward the cell plate 6 side. 13 is a knob nut screwed onto the mounting bolt 11.

(Embodiment 1 of bag filter support device) As an example of a specific mounting means, as shown in the top insertion type in Fig. 15 (,), the top cover (not shown) of a vertical dust collector is opened and the From above, a bag filter B with a filter cloth F fitted and supported in a retainer R is inserted into a guide cylinder 1 having the same shape as the retainer R.
0, and its main body is dropped into the dust-containing air chamber 8 of the dust collector housing H, and the open end of the bag filter B is engaged and held at the edge of the through hole 9.

Then, when the clamp plate 12 is fitted into the mounting bolt 10, and the knob nut 13 is screwed and tightened, =12
= The upper and lower surfaces of the mounting ring 1, which is formed by wrapping around the open end of the filter cloth F, are pressed and fixed.

(Example 2 of bag filter support device) Also, Fig. 5 (
]) In the case of the hanging type, insert the bag filter B into the guide tube 10 of the cell plate 6 from below from the lower part of the dust-containing air chamber 8 of the vertical dust collector, and then insert the bag filter B into the mounting port 10. Fit the clamp plate 12 from below, screw the knob nut 13, and tighten. Then, the lower and upper surfaces of the mounting ring 1 formed by wrapping around the open end of the filter cloth F are pressed open between the lower surface of the cell plate $ and the upper surface of the clamp plate 12, and as a result, the bag filter B is It is suspended by the cell plate 6.

(Example 3 of bag filter support device) Also, Fig. 5 (
In the case of the side insertion type c), the side of the dust collector housing H is attached to the vertical cell plate 6 that divides the dust collector housing H in the horizontal dust collector into the clean air chamber 1 side and the dust-containing air chamber 8 side. The bag filter B is inserted from the top and fixedly supported, and the other configuration is substantially the same as the above-mentioned top insertion type mounting structure.

(Example of blow tube) In addition, in the case of a vertical dust collector, as shown in Fig. 7 (b),
In the case of a horizontal dust collector, as shown in FIG.
The blow tube 14, which is arranged at a distance and injects high-pressure backwash air into the bag filter 3, is orthogonal to the filter row having a relatively wide retainer width N of the bag filter retainer R according to the present invention. As shown in FIGS. 5(a), 5(b), and 5(c), an injection nozzle 15 is formed toward the center of the cylinder of each retainer R.

(Function) When the clean air is sucked by a blower (not shown) connected to the outlet side of the clean air chamber 7 of the bag filter dust collector, dust-containing air is collected from the inlet of the dust-containing air chamber 8.
: The dust is drawn into the machine housing IJ, and most of the dust is adsorbed and collected by the filter cloth F fitted into the retainer R according to the present invention.

At this time, the shape of the bag filter B is such that the connecting rods 3 of the retainer R are connected in a wavy manner as shown in FIG. At the same time, guest dust present in areas where the suction force formed between these filters is relatively weak falls toward the bottom of the dust collector housing H and is collected.

On the other hand, the dust collected by the bag filter B is transferred to the blow tube 1, which has piping configured for each predetermined filter row.
High-pressure backwash air is instantaneously injected into the bag filter B from the injection nozzle 15 of No. 4. Then, a force acts on each bag filter B to make it as circular as possible due to the impact force acting outward from the inside, and by instantly forming a substantially elliptical shape, the dust particles are transferred to the bag filter B.
At the same time, the impact force caused by the backwash air propagates in a wave-like and pulsating-like manner toward the tip of the bag filter B, thereby brushing off the dust particles collected on the bag filter B and removing the dust particles from the housing I. ] to the bottom.

The performance is improved by appropriately repeating such dust collection and dust removal actions.

(Effects of the Invention) Hereinafter, the bag filter of 11 embodiments in which a filter cloth is inserted and supported in a substantially oval-shaped retainer will be described as a representative example of the present invention, and its usefulness will be explained using a substantially cylindrical retainer. This will be explained in comparison with a conventional bag filter in which a filter cloth is inserted and supported.

(1) The efficiency of accommodating bag filters having the same outer circumferential length in the dust collector housing and the number of bag filters accommodated can be greatly increased as shown in FIG. 6 (1).

In other words, the filtration speed in a filter dust collector and the amount of air passing through the filter cloth are determined by the number of filter cloths stored in the dust collector housing, but a small 1'IJ-shaped retainer has a smaller cross-sectional area than a cylindrical retainer. Since it can be made smaller and its volume can be reduced, the number of filter cloths that can be stored in the dust collector housing can be increased by the amount of volume reduction. For example, if the cross-sectional area of each filter cloth is approximately halved, the number of filter cloths stored will be approximately doubled. This greatly improves dust collection efficiency and dust removal efficiency.

(2) Therefore, if the dust collection capacity and dust removal capacity are set to approximately the same level as before, the size of the dust collector housing can be reduced to a smaller and more compact one, reducing equipment costs and It also requires less installation space.

(3) Furthermore, the amount of backwash air required during backwashing is reduced by the amount that the volume per bottle is reduced, and the running cost of the bag filter dust collector is significantly reduced.

(4) Compared to the case where filter cloths are arranged in a cylindrical retainer at predetermined intervals in the front, back, left and right, it is better to fit the filter cloths into an oval retainer and arrange them in a lattice pattern as shown in Figure 9. (I
As shown in J), the area where the suction force is weak X2) In other words, the area where the suction force is equal is formed in a band shape, so it is not affected by the suction force on the adjacent bag filter.
Dust particles tend to fall freely.

In other words, compared to arranging cylindrical retainers, arranging small-shaped retainers increases the free fall area below the floating velocity of guest dust, which significantly increases dust collection efficiency. .

(5) Looking at the superiority and inferiority of the two, the filter cloth is fitted into the retainer, so when collecting dust from a bag filter fitted into a cylindrical or oval shape,
As a result of the suction force, dust particles are absorbed in the inwardly bent state supported by the adjacent connecting rods, and when the high-pressure backwash air is injected, it expands into a large round shape. Figure 10 (1)) The degree of change in the shape of the filter cloth affects the cleaning effect.
As shown in , compared to the cylindrical shape, the small "I'll" shape can increase the amount of outward fluctuation of the filter cloth shape, and at the same time, the wave phenomenon of the hand force direction and ＼, Since the pulsation phenomenon is complex and fluctuates greatly, it has an extremely excellent brushing effect.

(6) In the case of the conventional internal shape retainer, it can be used for a vertical dust collector in which the bag filter is vertically supported on the top, but in the case of a horizontal dust collector in which the bag filter is horizontally supported in the horizontal direction. As shown in Fig. 3 (a), a relatively large amount of dust accumulates and accumulates in the upper half of the bag filter. By placing the relatively narrow part at the bottom, as shown in Figure 8 (IJ), it is possible to efficiently store and deal with the dust collector housing in this type of horizontal i-juku configuration, and also to prevent dust The amount of accumulated powder when dust is brushed off is extremely small by 1° compared to when a cylindrical bag filter is installed (7). Since the retainer of the present invention can also be used for T& support, it is extremely economical.

(8) In addition, if the blow tube is installed perpendicularly to the filter row with a relatively wide retainer width, the impact force and shock wave caused by the blow tube trying to become as circular as possible when injecting backwash air will cause
In particular, the comparatively narrow side of the adjacent retainer width is formed to be large or expanded, and a kind of knocking state is formed between the adjacent filter cloths, and at the same time, the form of the filter cloth shape is The effect of brushing off changes that accompanies change is also evident.

=19-

[Brief explanation of the drawing]

Figures 1 (, ), (1)), and (c) are a plan view, a front view, and a vertical side view showing a first embodiment of a bag filter retainer having a substantially oval cylinder shape, and Figure 2 ( a), (b),
(c) is a plan view, a front view, and a longitudinal cross-sectional side view showing 12 embodiments of a bag filter retainer having a cylindrical, approximately elliptical shape; 4(a), (1
)) and (c) are a plan view, a front view, and a vertical cross-sectional side view showing a fourth embodiment of a bag filter retainer having a substantially rectangular cylindrical shape. Figures 5(n), (+1), and (e) are enlarged views of main parts showing the installed state of the bag filter, of which Figure (a)
Figure (C) shows the top insertion type, and I (1)) the hanging type.
) indicates the side insertion type. FIGS. 6(a) and 6(b) are comparative diagrams showing a state in which adjacent bag filters are accommodated at a predetermined interval in bag filter housings having approximately the same size. , Figure (a) shows the accommodated state of the cylindrical bag filter of "Junior IY", and Figure (1)) shows the accommodated state of the oval-shaped bag filter. Figures 7 (, ), (1)) are comparative diagrams showing areas that prevent the dust from falling in a vertical dust collector.
Figure a) shows the case of a conventional cylindrical bag filter.
1]) shows the case of an oval-shaped bag filter. FIGS. 8(a) and 8(l)) are side views showing a case where a bag filter is configured in a horizontal dust collector. Figure (1)) shows a state in which an oval-shaped bag filter is accommodated. Figures 9 (,) and (1) are comparative diagrams showing areas where the suction force for dust particles in a vertical dust collector is weak, and Figure (a) is a comparison diagram of a conventional cylindrical bag filter. Figure (1)) shows the case of an oval-shaped bag filter. FIGS. 10(a) and (I)) are comparative diagrams showing the amount of fluctuation of the filter cloth fitted into the retainer, among which:
Figure (a) shows the case of a conventional cylindrical bag filter.
Figure (1)) shows the case of an oval-shaped bag filter. Code Table A Nil interval B Bag filter F
Filter cloth R retainer 1-1 Dust collector housing D Guest M Narrow retainer width N Wide) Retainer width 1 Mounting ring
2 Guide cylinder 3 Connecting rod 4 Reinforcing ring 5 Cap 6 Cell plate 7 Clean air chamber 8
Dust-containing air chamber 9 Through hole 10 Guide cylinder 11 Mounting bolt 12 Clamp plate 13 Knob nut 14 Blow tube 15 Injection nozzle rotation Figure 1 (b) Ia 1 Figure 2 (b) 1a 1 Japanese Patent Publication No. UG3-91115 (10 ) Fig. 3 (b) 1a 1 1Wl] ffG3-91115 ('i1) Fig. 4 (
b) 1a 1 1N opening ffG3-91115 (12) Ward method Ward ako method\j Ward Cko dimension -ku Ward O method〉 Ward method〉- Ward taste Fig. 9 (a) B Fig. 9 ( b) 3 Figure 10(b)

Claims (5)

[Claims] (1) Retainer R with a cylindrical cross-section frame and filter cloth F
In the bag filter retainer formed by inserting and supporting the retainer R, one retainer width M at the opposing position of the retainer R is
A retainer for a bag filter, characterized in that the width N of the retainer is relatively narrow, and the width N of the other retainer is relatively wide. (2) In the retainer for a bag filter according to claim 1, one of the facing positions of the retainer R has parallel surfaces 1a, 2a, and 4a, and the retainer width M is relatively narrow, and the other side is parallel to each other. A bag filter retainer formed as a retainer R having a substantially oval cross-section and a relatively wide retainer width N at circular arc surfaces 1b, 2b, and 4b. (3) In the retainer for a bag filter according to claim 1, one surface of the opposing position of the retainer R is a circular arc surface 1a, 2a, 4a having a relatively large diameter, and the retainer width M is relatively large. A circular arc 1b that is narrow and has a relatively small diameter on the other side.
, 2b and 4b, the retainer R has a relatively wide retainer width N and a substantially elliptical cross section. (4) In the retainer for a bag filter according to claim 1, one of the facing positions of the retainer R has parallel planes 1a, 2a, and 4a, and the retainer width M is relatively narrow, and the other side is parallel to each other. A bag filter retainer formed as a retainer R having a substantially rectangular oval shape in cross section with chevron-shaped surfaces 1b, 2b, and 4b and a relatively wide retainer width N. (5) In the retainer for a bag filter according to claim 1, one of the facing positions of the retainer R has parallel planes 1a, 2a, and 4a, and the retainer width M is relatively narrow, and the other side also has parallel planes 1a, 2a, and 4a. A bag filter retainer formed as a retainer R having a substantially rectangular cross section with parallel surfaces 1b, 2b, and 4b and a relatively wide retainer width N.