JPS625217Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a dust discharge device for discharging collected dust while blocking it from outside air in a large dust collector for a factory using a bag filter.

[Prior art]

The dust discharge structure of conventional bag filter type dust collectors is as shown in Figs. Dust is continuously or intermittently discharged from the hopper 7 by the Eufeeder 2' and collected. Here, the capacity of dust collector 8 is 100
Since the baghouse 6 becomes large when the air flow exceeds ~200 m ³ /min, the dust ejection method is to install a screw feeder 2' at the bottom of the hopper 7, and to install a screw feeder 2' on the bottom surface of the tip of the screw feeder 2 as shown in Fig. 3. A rotary valve 4' as shown in FIG. 4 is installed to cut out a certain amount of dust when discharging dust and to shut off air in the hopper 7 from outside air. However, in such a device, since a rotary valve 4' is further provided below the screw feeder 2' under the baghouse 6, the hopper 7 is
Since the height of the lower side is required, the height of the baghouse 6 becomes very high. (The problem is even more serious because the dust is mixed with water after receiving the water.) The rotary valve 4' and the screw feeder 2' are separated from each other by separate shafts 3a and 3b.
The screw feeder 2' and the rotary valve 4' have different rotational speeds, so normally the screw feeder 2' is rotated by a motor 9' via a reduction gear, and the screw feeder 2' is rotated by the same motor 9'. ' The rotary valve 4' is rotated by a pulley and chain drive, which makes the structure of the drive part complicated and causes problems in terms of maintenance. There was a problem that the blocking function of the

[Purpose of invention]

This invention was made to solve the problems of the conventional technology mentioned above, and by configuring the screw feeder and rotary valve coaxially, it can be made compact in the height direction, and the height of the baghouse can be reduced. The purpose of the present invention is to provide a hopper that can lower the hopper, simplify the structure of the drive part, and eliminate the problems of wear that occur in the past, and that has excellent structure and insulation between the air inside the hopper and the outside air. .

[Structure of the idea]

Reference numeral 2 denotes a screw feeder installed under the hopper 7 below the baghouse 6 shown in FIG. It is housed in a casing 11, rotatably supported by bearings 12 at both ends, and driven by a motor (not shown). Shaft 3
A hollow drum-shaped rotary valve 4 is fixed to the end of the screw feeder casing 11 in the dust feeding direction, and a cylindrical rotary valve casing 5 is connected to the end of the screw feeder casing 11 in the dust feeding direction. The rotary valve 4 is rotatably delivered within a rotary valve casing 5.
Further, a dust outlet 14 is provided on the lower surface of the rotary valve casing 5, a partition wall 16 is provided vertically at the upper part of the rotary valve casing 5 on the screw feeder 2 side, and a dust outlet hole is provided on the outer peripheral surface of the rotary valve 4. 13 is opened, and as the rotary valve 4 rotates, the dust extraction hole 13 is opened.
The rotary valve 4 is configured to open and close, and a dust intake hole 15 is opened in the end face of the rotary valve 4 on the screw feeder 2 side.
The dust intake hole 15 opens and closes as the dust rotates, and when the dust extraction hole 13 overlaps the dust outlet 14 on the bottom surface, the dust intake hole 15 is closed by the partition wall 16. When the dust intake hole 15 is opened, the dust extraction hole 13 is closed by the rotary valve casing 5, and the dust extraction hole 13 and the dust intake hole 15 are opened at the same time. 7
The dust intake hole 15 and the dust extraction hole 13 can be opened and closed while completely blocking the air inside and outside air.

The dust that has fallen into the hopper 7 is sent by the screw feeder 2, and when the dust intake hole 15 is blocked by the partition wall 16 as shown in FIG. When the dust intake hole 15 opens as shown in Figure 6, the dust is taken into the rotary valve 4 from the dust intake hole 15 in an almost constant amount, and again as shown in Figure 5. When the dust intake hole 15 is blocked, the dust is discharged from the dust extraction hole 13, which is opened.

Note that the design of the present invention can be modified as follows depending on usage conditions. The outer diameter of the rotary valve 4 may be larger than the outer diameter of the screw feeder 2 depending on the dust discharge capacity. Send dust to the center with two screw feeders 2,
A rotary valve 4 can also be provided in the center to discharge dust. As the dust discharge method, either a continuous type or an intermittent type can be applied.

[Effect of idea]

Since the present invention is constructed as described above, the screw feeder and the rotary valve are coaxially formed by a common shaft, making it compact in the height direction and making it possible to reduce the height of the baghouse. Furthermore, since the screw feeder and rotary valve can be rotationally driven by a common shaft, the structure of the drive section is simple, maintenance is easy, and costs are low. Furthermore, by preventing the rotary valve's dust intake hole and dust outlet hole from opening at the same time, dust can be discharged while reliably blocking the air inside the hopper from the outside air, making it possible to remove the dust from the hopper by preventing it from opening at the same time. There is no problem of wear, and the dust collection efficiency and reliability are high.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view with a part broken away showing a conventional example, Fig. 2 is a cross-sectional view of the screw feeder part of the same, Fig. 3 and Fig. 4 are a front view and a cross-sectional view with a part broken away of the dust discharge device of the same, Fig. 5 and Fig. 6 are cross-sectional views showing an embodiment of the present invention, Fig. 7a,b are X-X and Y-Y cross-sectional views of Fig. 5. 1... dust feed blade, 2... screw feeder, 3... shaft, 4... rotary valve, 5... rotary valve casing, 13...
...dust removal hole, 14...dust exhaust port, 15...
...dust intake hole, 16...partition.

Claims (1)

[Scope of utility model registration request] A hollow drum-shaped rotary valve is fixed at the end in the dust feeding direction of the screw feeder shaft having a spiral dust feeding blade, and the rotary valve is rotatably delivered inside the rotary valve casing, and the outer periphery of the rotary valve is A dust outlet is formed on the bottom surface of the rotary valve casing, and a dust intake hole is formed on the end surface of the rotary valve on the screw feeder side. A partition is provided in the , and when the dust extraction hole and the dust discharge port match, the dust intake hole is closed by the partition, and when the dust intake hole is opened, the dust is taken out by the rotary valve casing. A dust discharge device for a dust collector that has closed holes.