JPS6321309Y2 - - Google Patents

Description

[Detailed explanation of the idea]

<Industrial Application Field> The present invention relates to a filtration device having a rotary dust cage that can be incorporated into a dust collector. For example, in spinning machines such as cotton mixing machines, carding machines, and shearing machines, large amounts of cotton dust and other dust are generated, so large-capacity dust collectors are installed. <Conventional device> This type of dust collector includes a filtration device having a filter medium and a removal device that collects and discharges dust separated from exhaust air by the filter medium. There are two types of dust cages in which the dust cage serving as a filter medium is immovable as shown in Japanese Utility Model Publication No. 55-41313, and there is another type in which the dust cage serving as a filter medium rotates in substantially the same direction as the exhaust air supply direction as shown in FIG. In the former case, the exhaust air supplied into the device enters the dust cage while swirling around the annular wind guide surface, but the exhaust air passes at an angle close to the centripetal direction of the dust cage, and the contained The dust not only adheres to the surface of the wire mesh of the dust cage, but also sometimes enters into the mesh of the wire mesh.Furthermore, there is a problem that the area near the exhaust intake port is particularly prone to clogging. A backwashing nozzle is rotatably provided inside the device, and the attached dust is removed with ejected air, making the structure complicated. In the latter case, the dust cage is rotated to eliminate partial clogging in the former case, but similarly to the former case, the exhaust air is filtered at an angle close to the centripetal direction of the dust cage, so that the surface And it is difficult to prevent internal clogging. To this end, the latter filtration device is configured such that a pair of delivery rollers are disposed close to the dust cage, and the delivery rollers separate the attached dust and collect and remove it. <Problems to be solved by the invention> However, in both methods, it is difficult to remove the dust that has entered the mesh of the wire mesh of the dust cage 6, and therefore clogging occurs easily, and the backwash nozzle rotates. Since the dust adheres to the filter until it is completely covered or to the extent that it can be peeled off, the exhaust air is subjected to passage resistance due to the adhered dust, making it difficult to maintain a highly efficient filtration action. <Means for solving the problem> In view of the problems of the conventional device, the present invention rotates the dust cage in a direction opposite to the exhaust air to separate the dust without adhering to the dust cage. It is an object of the present invention to provide a filtration device that can maintain a highly efficient filtration action without clogging the dust cage or increasing wind passage resistance. A feature of the present invention for achieving this purpose is that the dust cage 6 is rotatably disposed within the casing 12 having the dust-containing exhaust air intake 13 and its guide surface 27, and In the filtration device, the exhaust air taken in from the dust cage 6 is guided by the wind guide surface 27 at an angle substantially close to the tangent to the outer circumference of the dust cage 6 and passes through the dust cage 6. The dust cage 6 is rotated in a direction substantially opposite to the exhaust air in order to cause the incoming exhaust air to pass through while creating turbulence around the outer periphery of the dust cage 6. <Example> Hereinafter, an example of the present invention will be described based on the drawings. In the first embodiment shown in FIGS. 1 to 3, a filtration device 1 has a dust cage 6 arranged in the center of a casing 12, which is rotatable about a horizontal axis, an intake port 13 for exhaust air containing dust is formed in the upper part, and a dust cage 6 is arranged in the center of a casing 12. A pair of arc-shaped guide plates 14 are disposed at. The dust cage 6 has one cylindrical wire mesh 15 (filter material).
The horizontal shaft 17 is supported by a pair of side plates 16A and 16B, and the horizontal shaft 17 to which this pair of side plates 16 is attached is attached to one side of the casing 12.
It is supported by a pair of intermediate walls 18 via bearings, one of the pair of side plates 6 is a blind plate, and the other is a plate having an opening 19 through which air can pass. In FIG. 2, the outer wall 20 of the casing 12
A, 20B are provided with a door 21 for repair/inspection, and a drive mechanism 24 for a horizontal shaft 17 consisting of a motor 22, a chain transmission means 23, etc. is arranged between one outer wall 21A and the intermediate wall 18A. A chamber 25 communicating with the inside of the dust cage 6 is formed between the other outer wall 20B and the intermediate wall 18B, and this chamber 25 has a front wall, a rear wall, or an upper wall open and is open to the outside. or other eg bag filter type dust collector. The casing 12 has a downwardly inclined wall 26 on the back side of the intake port 13, and the inner surface a of this inclined wall 26, the inner surface b of the back wall of the casing 12, and the inner surface c of the guide plate 14 form the inner surface of the intake port 13. A wind guide surface 27 is formed that supplies the exhaust air taken in from the dust cage 6 to the dust cage 6 while swirling it. This wind guide surface 2
7 has a substantially continuous arc shape, and the dust cage 6
A gap 28 between the dust cage 6 and the dust cage 6 extends from the side to the bottom of the dust cage 6.
is formed so that it gradually becomes smaller. The exhaust air guided by the wind guide surface 27 is filtered by passing through the wire mesh 15 of the dust cage 6 and enters the inside thereof, flows in the dust cage 6 in the axial direction and passes through the opening 19. Room 25
It is then discharged to the outside or sent to the dust collector. Since the exhaust air flows along the wind guide surface 27, it is blown approximately along the outer periphery of the dust cage 6, that is, at an angle approximately close to the tangent to the outer periphery. The dust cage 6 is rotated in the counterclockwise direction in FIG. 1, that is, in the direction X opposite to the direction of the exhaust air, and as shown in FIG. is rotating and generates wind on its surface, causing turbulence when passing through the wire mesh 15. Dust such as cotton dust contained in the exhaust air is separated from the exhaust air by the turbulent flow without adhering to the wire mesh 15, and falls by its own weight or riding on the exhaust air going further downward. Moreover, even if the dust once adheres to the wire mesh 15, it is peeled off by the exhaust air that approaches from a substantially tangential direction. When the filtration efficiency of the filtration device of the above embodiment was compared with the case where the dust cage 6 was rotated in the forward direction of the exhaust air, the experimental results shown in the following table were obtained.

【table】

[Table] However, the exhaust air is from the shear ring,
Suction device 3 has a rated power of 45kw, horsepower 4p, and wind speed 8.9
m/sec, air volume 626 m ³ /min, dust cage 6 has a diameter of 1500 mm, length 1600 mm, suction dust collector 30 has a rated power of 0.2 kW, rotation speed 18 rpm, suction wind speed 22.6 m/sec,
The suction air volume is 50 m ³ /min. As is clear from this experimental result, by rotating the dust cage 6 in the opposite direction to the exhaust air,
Compared to the forward direction, clogging hardly occurs and the period of effective filtration is longer. A dust collection suction port 29 is formed by a pair of guide plates 14 at the end position of the wind guide surface 27 directly below the dust cage 6 . This suction port 29 descends to the position where the gap 28 is the smallest and sucks and takes out the collected dust, and the suction dust collector 3
0 is connected. This suction dust collector 30, the filtration device 1, the gap 28, etc. constitute one dust collector, and the suction dust collector 30 also includes a filtration device. 4 and 5 show a filtration device 1' as a second embodiment of the present invention, which is incorporated into a suction dust collector 30. Reference numeral 12' designates a vertically oriented cylindrical casing, and a downwardly tapered part 42 is formed at the lower part of the casing 12'.
A partition plate 44 is provided internally in the middle, an intake port 13 for taking in the supplied exhaust air is formed in the tangential direction below the partition plate 44, and a purified air outlet 45 is provided above the partition plate. is formed. 6 is a cylindrical dust cage concentric with the casing 12', the upper end of which is open, and the partition plate 44
The lower part is closed by a bottom plate 46, and is fixed together with a screw 48 to the lower end of a rotating shaft 47 passing through the dust cage 6. The rotating shaft 47 is a cylindrical bearing member 4 disposed from the upper part of the casing 12' through the partition plate 44.
9 is rotatably supported around a vertical axis via a bearing, and its upper end is connected to the motor 22 via a coupling ring 50. In this suction dust collector 30, the casing 1
The dust-containing exhaust air that entered from the intake port 13 of 2' is
The casing 12' rotates while being guided by the circular wind guide surface 27 on the inner surface thereof, and its centrifugal force separates coarse dust, while fine and lightweight dust flows toward the dust cage 6. The exhaust air containing light dust hits the dust cage 6 at an angle close to the direction tangent to the outer circumference, but as in the first embodiment shown in FIG. By creating turbulent flow, dust is separated without adhesion, and the exhaust air that penetrates the surrounding air peels off dust adhering to the dust cage. The separated fine dust falls down to the lower part of the casing 12' together with the coarse dust, is accumulated at the tapered part 42, and is transferred to the screw 48.
The dust is gradually pressed from the dust removal port 43. FIG. 6 shows an example in which the filtration devices 1, 1' of the present invention are incorporated into a dust collector such as a shearing machine, carding machine, or mixing machine. From the dust source 33 such as shearing to the hood 3
4 and a duct 4 to suck dust with a suction device 3, and the exhaust air is sent to a dust collector 1 having a filter device 1.
1 for primary treatment, the exhaust air that has passed through the dust cage 6 is sent to the dust collector 2 via the ventilation pipe 36 for secondary treatment, and the purified air is discharged to the outside from the discharge port 35. do. The suction port 29 of the dust collector 11 is connected to a suction dust collector 30 having a filtration device 1' via a connecting pipe 37, and a suction device 38 for removing dust adhering to the filter of the dust collector 2 is connected to the connecting pipe 37. are connected, and the dust separated by both dust collectors 11 and 2 can be collected and taken out by the cotton collector 30, and the exhaust air from the cotton collector 30 is passed through the ventilation pipe 39 to the dust collector 2.
It is configured to be circulated to <Effect of the invention> According to the invention detailed above, the casing 12
The exhaust air taken in from the intake port 13 is guided by the wind guide surface 27 so that it hits the dust cage 6 at an angle substantially close to the tangent to the outer circumference, and
Since the dust cage 6 is rotated in a direction opposite to the exhaust air, the exhaust air can be passed through while creating turbulence around the outer periphery of the dust cage, thereby removing dust contained in the exhaust air. It can be separated without adhering to the dust cage 6, and even if dust is attached to the dust cage 6, it can be removed by the exhaust air, thereby preventing clogging of the dust cage 6 and increasing wind passage resistance. , it is possible to maintain a highly efficient filtration action, and thus it is possible to continuously process a large amount of air.

[Brief explanation of drawings]

Figures 1 to 3 show the first embodiment of the present invention, with Figure 1 being a sectional front view, Figure 2 being a sectional side view,
Fig. 3 is an explanatory diagram showing the filtration action, Figs. 4 and 5 show a second embodiment of the present invention, Fig. 4 is a cross-sectional front view, and Fig. 5 is a cross-sectional view taken along the line V-V of Fig. 4. Figure 6 is an explanatory diagram showing an example of the use of the filtration device of the present invention, Figure 7 is
The figure is an explanatory diagram of a conventional device. 1...filtration device, 6...dust cage, 12...
...Casing, 13...Intake port, 15...Wire mesh,
27...Air guide surface, 28...Gap, 29...Dust collection suction port, 30...Suction dust collector, X...Rotation direction.

Claims (1)

[Scope of utility model registration request] Dust-containing exhaust air intake port 13 and its guide surface 27
The dust cage 6 is rotatably arranged in a casing 12 having a casing 12, and the exhaust air taken in from the intake port 13 is guided by the wind guide surface 27 at an angle substantially close to the tangent to the outer circumference of the dust cage 6. 6
In the filtration device, the dust cage 6 is rotated in a direction substantially opposite to the exhaust air in order to cause the exhaust air guided by the wind guide surface 27 to pass through while creating turbulence around the outer periphery of the dust cage 6. A filtration device characterized by: