JP3209895B2 - Airtight device for large diameter rotating body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary body such as a rotary kiln, a rotary cooler, a rotary dryer and the like used in an industrial waste treatment facility, a manufacturing facility for cement, alumina, coke, limestone and the like. The present invention relates to an airtight device for a large-diameter rotating body that performs gas sealing with a fixed member disposed in a rotary shaft.

[0002]

2. Description of the Related Art An air seal between a rotary kiln used in a conventional cement burning facility and a hood (an example of a fixing member) around the rotary kiln uses a labyrinth seal,
For example, as disclosed in Japanese Utility Model Laid-Open No. 57-63157, a device using a seal plate having elasticity in a seal portion has been proposed. Further, as disclosed in Japanese Patent Publication No. 5-71869, a sealing device in which a number of spring members are partially overlapped and annularly arranged is proposed.

[0003]

However, the labyrinth seal alone does not provide a sufficient sealing effect, and the amount of invading air is large, making combustion control difficult. In addition,
In the air seal device described in 63157 gazette,
There is no particular problem when the rotating body is a perfect circle, but when the rotating body has a large diameter, there are many cases that generally have a can-making structure, making it difficult to make the outer peripheral surface uniform, and air There was a problem that leaked. And, Japanese Patent Publication 5-71869
Also in the sealing device described in Japanese Patent Application Laid-Open Publication No. H10-115, air leaks from gaps between a large number of spring members, and the sealing may be insufficient depending on the device used. The present invention has been made in view of such circumstances, and an object of the present invention is to provide an airtight device for a large-diameter rotating body having a simple structure and good sealability.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The large-diameter rotary body hermetic device described above is a large-diameter rotary body hermetic device that seals a large-diameter rotary member rotationally driven by a driving source and a fixed member disposed around the large-diameter rotary member. A roller chain with tensioning means wound around the peripheral surface of the radial rotating body, an attaching member attached to the roller chain, and one side of the fixing member which is mounted in a sealed state, and the other side of the large diameter rotating body. It has a ring-shaped elastic seal member which is in sliding contact with the outer peripheral surface and whose intermediate portion is fixed to the mounting member. In addition, it is possible to provide not only one tensioning means but also a plurality of tensioning means at an appropriate interval with respect to the one-turn roller chain. The tensioning means includes, in addition to a tensioning means using a spring or the like, a tensioning means using a counterweight, and a means for forcibly lifting a roller chain using a turnbuckle.

[0005]

According to the first aspect of the present invention, in the airtight device for a large diameter rotating body, a roller chain with a mounting member is mounted around the large diameter rotating body, and an intermediate portion of an elastic seal member slidingly contacting the outer periphery of the large diameter rotating body. Is fixed to the mounting member of the roller chain, so that the elastic seal member moves along the movement of the roller chain, that is, along the outer peripheral surface of the large-diameter rotating body with which the roller chain contacts. Therefore, even if the large-diameter rotary body has a can-making structure and is not a perfect circle, the elastic sealing member moves with the movement of the roller chain, so that the outer peripheral surface of the large-diameter rotary body is always elastically sealed. The member can be pressed to maintain the sealed state. Further, since the roller chain is provided with the tensioning means, even if the roller chain is slightly worn and the roller chain is slightly extended, the tensioning means works and the roller chain always comes into contact with the outer peripheral surface of the large diameter rotating body. As a result, the roller chain does not hang down, and the elastic seal member is kept in sliding contact with the outer peripheral surface of the large-diameter rotating body.

[0006]

According to the first aspect of the present invention, even if the large-diameter rotary body airtight device has a relatively simple structure and relatively low production accuracy, each roller chain has a large-diameter rotary body. The body moves following the outer peripheral surface of the body, and the elastic sealing member is always in sliding contact with the outer peripheral surface, so that reliable sealing can be performed. Also, the length of the roller chain due to wear is absorbed by the attached tension means, so that the sealing state can be maintained for a long time.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is an explanatory view of an airtight device for a large-diameter rotating body according to an embodiment of the present invention, FIGS. 2 and 3 are explanatory views of a tensioning means, and FIG. 4 is an explanatory view of another example of a tensioning means. It is.

As shown in FIGS. 1 and 2, a large-diameter rotary body airtight device 10 according to one embodiment of the present invention includes a large-diameter rotary body 11 driven by a rotary power source (not shown), and a fixing member. A roller chain 14 wound around the outer peripheral surface 13 of the large-diameter rotating body 11 and a ring-shaped member attached to the roller chain 14 via an L-shaped link plate 16 which is an example of a mounting member. Elastic seal member 15. Hereinafter, these will be described in detail.

The roller chain 14 with the mounting member
Uses a commercially available roller chain with an attachment using an L-shaped link plate 16 on one side.
And it is arrange | positioned along the outer periphery of the large diameter rotating body 11, and the tension | tensile_strength means 17 is provided in the joint as shown in FIG.2, FIG.3.

The tensioning means 17 includes connecting members 20 and 21 connected to the roller chain 14 to be joined via pins 18 and 19, respectively, and the connecting members 20 and 21.
And a connecting pin 24 fixed to one connecting fitting 21 and provided with a seat plate 23 on the other connecting fitting 20.
Accordingly, the roller chain 14 attached to the outer peripheral surface 13 of the large-diameter rotating body 11 is urged to always contract.
The tensioning means 17 may have another structure as long as it has a structure that applies a pulling force to the roller chain 14. For example, the tensioning means 17 applies tension to the roller chain 14 connected to both ends by a tension spring. There may be. The extension of the roller chain 14 can be further corrected by mounting a plurality of the tensioning means 17 at appropriate intervals.

FIG. 4 shows a tensioning means 36 used in a large-diameter rotary body airtight device according to another embodiment. The tensioning means 36 is a roller surrounding a lower outer surface of the large-diameter rotary body 11. Both ends of the chain 37 are suspended from above by applying a certain tension. That is, attachments 38 and 39 are attached to both sides of a roller chain 37 attached to the outer peripheral surface 13 of the large-diameter rotating body 11, and a turnbuckle 40, which is an example of length adjusting means, is provided in one of the attachments 38 at an intermediate portion. Rod 41 (may be a wire rope)
Is fixed, and the upper end of the rod 41 is attached to the fixing member 42. And, on the other attachment 39,
A wire rope 4 with a counterweight 45 attached to the other end via a pulley 44 attached to the fixing member 43
6 is attached to one end. The roller chain 37 located above the large-diameter rotating body 11 is provided with the tensioning means 17 using the above-described spring.

Therefore, the roller chain 37 located below the large-diameter rotating body 11 is tensioned by the counterweight 45, and the upper roller chain 37 is tensioned by the tensioning means 17. The outer peripheral surface 13 of the large-diameter rotating body 11 is always attached in a tensioned state.

On the other hand, a fixing member 12 having a ring-shaped groove in cross section is provided on the fixing member 12 arranged with a certain small gap with respect to the large diameter rotating body 11. One end of an elastic seal member 15 having an L-shaped cross section is fixed. An intermediate portion of the elastic seal member 15 is sandwiched between a T-shaped connecting fitting 26 screwed to the other end of the L-shaped link plate 16 bent in the L-shape and a mounting plate 27 opposed thereto. In the state,
The elastic sealing member 15 is fixed by a plurality of screws 28.
Is in sliding contact with the outer peripheral surface 13 of the large-diameter rotating body 11. In this case, even if the outer peripheral surface 13 has irregularities, the roller chain 14 moves along the outer peripheral surface 13, so that the leading end of the elastic seal member 15 always abuts the outer peripheral surface 13 at a constant pressure, and gas sealing is performed. It has become.

The elastic seal member 15 is preferably made of a material which is relatively resistant to wear and has heat resistance, such as rubber, plastic having heat resistance, and the like.
Asbestos and the like can be applied. In FIG. 1, 29
Is a screw, 30 is a roller, 31 to 33 are link plates,
34 is a pin. Although the roller chain 14 is a commercially available chain, the present invention may be applied to any other structure as long as it has rollers that rotate while contacting the outer peripheral surface 13 and link plates and pins for connecting the rollers. Is applied.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an airtight device for a large-diameter rotating body according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a tensioning means.

FIG. 3 is an explanatory view of a tensioning means.

FIG. 4 is an explanatory view of another example of the tensioning means.

[Explanation of symbols]

10: airtight device for large-diameter rotating body, 11: large-diameter rotating body, 1
2: fixing member, 13: outer peripheral surface, 14: roller chain,
15: elastic seal member, 16: L-shaped link plate,
17: tension means, 18: pin, 19: pin, 20: connecting fitting, 21: connecting fitting, 22: compression spring, 23:
Seat plate, 24: connecting pin, 25: mounting bracket, 26: connecting bracket, 27: mounting plate, 28: screw, 29: screw, 3
0: roller, 31: link plate, 32: link plate, 33: link plate, 34: pin, 36: tension means, 37: roller chain, 38: attachment,
39: Attachment, 40: Turnbuckle, 41:
Rod, 42: fixing member, 43: fixing member, 44: pulley, 45: counterweight, 46: wire rope

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Atsushi Kobayashi 46-59 Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Corporation Inside the Machinery & Plant Business Department (72) Inventor Tomoo Yoshitake Tobata-ku, Kitakyushu-shi, Fukuoka 46-59 Ohara Nakahara Nippon Steel Corporation Machinery & Plant Division (72) Inventor Shigeru Mitarai 46-59 Nakahara Oaza, Tobata-ku, Kitakyushu-shi, Fukuoka Nippon Steel Plant Design Co., Ltd. (56) References 6-229678 (JP, A) JP-A-58-82 (JP, A) JP-B-59-2471 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F27B 7/00 -7/42 C04B 7/44 F23G 5/00-7/14 F26B 1/00-25/22 C09K 3/10

Claims (1)

(57) [Claims] An airtight device for a large-diameter rotator that seals a large-diameter rotator rotationally driven by a drive source and a fixed member disposed around the large-diameter rotator, wherein a peripheral surface of the large-diameter rotator is provided. A roller chain with tensioning means wound around and an attachment member attached to the roller chain, one side of which is attached to the fixing member in a sealed state, and the other side slides on the outer peripheral surface of the large diameter rotating body,
In addition, an airtight device for a large-diameter rotary body, characterized in that an intermediate portion thereof has a ring-shaped elastic sealing member fixed to the mounting member.