JP2557911Y2 - Seal structure of drum rotary type equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure of a rotary drum type device such as a rotary dryer for drying sludge or a rotary kiln for incineration. .

[0002]

2. Description of the Related Art Heretofore, in a rotary drier which is a rotary drum-type device of this kind, moisture contained in a material to be dried such as sludge is evaporated to produce a dried material for incineration in an incinerator. It has been proposed as one. This rotary drier is provided with a drying drum for accommodating sludge and the like. A member having a stirring function is provided in the drying drum, and the drying drum is rotated to agitate the sludge and the like. Is generated.

Further, in this rotary dryer, a drum seal portion is provided at both ends of the drum to prevent the outside air from entering in order to increase the drying efficiency by setting the inside of the drying drum to a negative pressure state. As shown in FIGS. 5 and 6, this drum seal portion is provided with a hood 13 so as to cover a part of the outer peripheral surface of the drying drum 1, and an outward flange 15 is provided at the end portion over the entire circumference. I have. An annular gasket 20 made of a rubber-impregnated glass fiber woven fabric as a sealing member is fixed to the entire side surface 15 a of the flange 15 by a bolt 18 via a seal retainer 23. On the side of the gasket 20 on the side of the drying drum 1, an annular pressing plate 21 for pressing the gasket 20 against the outer peripheral surface of the drum is provided over substantially the entire circumference of the drying drum 1. Reference numeral 22 denotes a coil spring connected to both ends of the holding plate 21. With such a configuration, the drying drum 1 is sealed, so that invasion of outside air can be prevented.

[0004]

However, the sealing method using the gasket 20 and the holding plate 21 is the same as that of the gasket 2.
0 is low in abrasion resistance, so that the friction with the rotating drying drum 1 causes wear in a short period of time and a hole is opened.
There was . Further, the gasket 20 has a problem that can not be completely prevented from entering the ambient air gap is formed even at the time of rotation of the chipping drying drum 1 and the drying drum 1 sealability is insufficient in flexibility. Furthermore, the gasket as a sealing member
The ring 20 is an annular member having substantially the same diameter as the drying drum 1.
Therefore, when attaching to the outward flange 15,
The gasket 20 becomes bulky and the work becomes complicated.
There was also a problem.

[0005] The present invention is was made in order to solve the above respective problems, and its object is collected by the drum seal portion
Good workability with easy construction and simple structure
Seal structure of rotary drum type equipment that can maintain long life
Is to provide .

[0006]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
According to the present invention, there is provided a drum rotating type device which rotatably supports a drum and provides a drum seal portion on an outer peripheral surface of the drum to maintain a negative pressure inside the drum, wherein the drum seal portion includes a plurality of drum seal portions . Thin with wear resistance and flexibility
Consisting of seal plates, each of which is partially
At the outer periphery of the drum and bends.
The gist is that they are arranged so as to be alternately overlapped in the ram rotation direction . The seal plate is made of flat fan-shaped metal.
It may be configured to be a thin plate.

[0007]

In the present invention, a drum seal portion is formed.
Each seal plate is highly flexible, and each seal plate
So that the part abuts against the drum outer peripheral surface in a bent state
It is attached one by one. In this way, each seal plate is
It is arranged so that it overlaps alternately in the direction of ram rotation.
The drum seal, which has excellent wear resistance,
Along with the inside of the drum
The section is maintained in a negative pressure state.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a rotary dryer will be described below with reference to the drawings. As shown in FIG. 1, a cylindrical drying drum 1 of a rotary dryer A includes
2, are installed on the machines 3, 3 via a drum chain 5 by a drum drive motor 4 provided below the drying drum 1. A fixing plate 6 fixed to the machine base 3 is provided at the right end of the drying drum 1, and a discharge unit 7 for discharging dry sludge and drying exhaust gas is provided at the left side. A stirring member (not shown) is provided in the drying drum 1. An input hopper 12 for inputting sludge or the like is provided on the upper right side of the drying drum 1, and a discharge unit having a transfer screw inside the input hopper 12 penetrates through the fixing plate 6 and protrudes into the drying drum 1.

A hood 13 is provided on the end of the fixed plate 6 and on the right side of the discharge section 7 so as to cover a part of the outer peripheral surface of the drying drum 1. Further, a drum seal portion 14 for maintaining a negative pressure state inside the drum is provided at an end portion of the both hoods 13. Next, the drum seal portion 14 will be described in more detail. As shown in FIGS. 2 to 4, an end of the hood 13 is provided with an outward flange 15 over the entire circumference, and a side surface 15 a of the flange 15 is provided.
A flat fan-shaped seal plate 16 made of a thin metal plate and made of stainless steel abuts on the drying drum 1 on the entire surface and is bent.
A large number are arranged so as to bend and alternately overlap.
Each seal plate 16 is fixed by a bolt 18 via a fixed plate ring 17. Moreover, it said the seal plate 16 the drying drum 1 notch 19 in two places in the abutting sides are provided so as to extend in the radial direction of the drying drum 1, and easily contactable to the drying drum 1 bend Has become.

[0010] Next will be described operation of the present embodiment, the drying drum 1 is rotated by the drum drive motor 4 is the sealing plate 16 of the drum seal portion 14 Ru <br/> to sliding contact with the drying drum 1. By using the stainless steel sealing plate 16 in this state, the flexibility is improved as compared with the conventional gasket, and a gap with the drying drum 1 is hardly generated, and a good sealing state is obtained. Also, stainless steel sealing plate 1
By alternately arranging two 6s, it is possible to improve abrasion resistance and to provide a long-life sealing property.

The present invention is not limited to the above embodiment, but can be applied to, for example, a rotary kiln type incinerator and the like. It may be changed to a composite plate of a metal and a resin material or a rubber material.

[0012]

As described in detail above, according to the seal structure of the drum rotary type device of the present invention , the configuration of the drum seal portion
Is simple, and the attachment work can be
It has an excellent effect that good sealing performance can be maintained for a long life .

[Brief description of the drawings]

FIG. 1 is a front external view showing a rotary dryer of the present embodiment.

FIG. 2 is a side view of a main part showing a seal structure of the present embodiment.

FIG. 3 is a sectional view of a main part showing a seal structure of the present embodiment.

FIG. 4 is a front view showing an overlapping state of the seal plates of the present embodiment.

FIG. 5 is a side view of a main part showing a conventional sealing structure.

FIG. 6 is a sectional view of a main part showing a conventional seal structure.

[Explanation of symbols]

1. Drying drum, 14 drum seal part, 16 seal plate, A rotary dryer.

Claims (2)

(57) [Scope of request for utility model registration] 1. A drum rotary type device which rotatably supports a drum and has a drum seal portion provided on an outer peripheral surface of the drum to maintain the inside of the drum in a negative pressure state, wherein the drum seal portion is formed of a plurality of sheets. Thin with abrasion and flexibility
Consisting of seal plates, each of which is partially
At the outer periphery of the drum and bends.
A sealing structure for a drum rotary type device, wherein the sealing structure is arranged so as to be alternately overlapped in the ram rotation direction . 2. The seal plate is a flat fan-shaped thin metal plate.
Seal structure of a drum rotary device according to claim 1, wherein that.