JP2549950Y2 - Flange fastening device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically fastening an upper tank and a lower tank of a vacuum tank for steelmaking, which are subjected to high heat, for example.

[0002]

2. Description of the Related Art Conventionally, FIG.
As shown in the publication, a first cotter 16 is provided on an upper tank flange, and a second cotter 17 is provided on a lower tank flange. It is disclosed that when rotated, cam surfaces 18 and 19 are formed to bring both flange portions close to each other. However, in the cotter portion of each flange receiving high heat, a sufficient wedge effect cannot be expected due to elongation due to thermal expansion, so that a sufficient fastening force cannot be obtained in terms of safety. Therefore, at present, bolt-and-nut fastening by manual fastening is adopted.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a remote automatic transmission which can obtain a stable and sufficient fastening force which does not reduce the sealing effect between the flanges even in an environment where each flange receives high heat. An object of the present invention is to provide a flange fastening device.

[0004]

In order to achieve this object, an apparatus according to the present invention comprises a furan disposed around the end of a tank.
A fastening device of di-, around the ends of the one disposed hooks swing cylinder barrel of the vessel is connected via a rod and hook swinging ring and the pin of the cylinder, the other of the tank one end
Abuts the other end a hook beam to swingably top of a plurality of hooks that pin connected to said hook swinging ring lower end and the contact, the one vessel to the end surface of the disposed flanges B to
And a rod for moving the hook is attached to a flange A disposed around the end of the flange, and a rod of the cylinder is rotatably connected to a hook beam.

[0005]

By reciprocating the hook swinging cylinder, the hook swinging ring is reciprocated, and the tip of the hook is swung. Further, by reciprocating the hook moving cylinder, the hook is reciprocated. By these operations, the two flanges can be fastened or released. The body in the apparatus of the present invention is, for example, a generic name for the upper vacuum tank, the upper tank, and the lower tank.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment based on the drawings. FIG. 1 is a front view of the flange fastening device of the present invention, FIG.
Is a side view of the flange fastening device, FIG. 3 is a schematic view of a vacuum chamber,
FIG. 4 is a cross-sectional view of the hook swing cylinder incorporating the spring of the present invention. The main body of the hook swinging cylinder 1 is fixed to the upper vacuum tank iron shell 10, the rod tip is joined to the hook swinging ring 2 with a pin, and the roller 15 of the hook swinging ring 2 It is designed to be pressed against the upper end. Normally, the hook swing cylinder 1 is stopped so as to set a gap between the roller 15 of the hook swing ring 2 and the upper end of the hook 3. The number of the hook swing cylinders 1 is sufficient if it has the necessary capacity to swing the plurality of hooks 3 and stably moves the hook swing ring 2 up and down. . The hook beam 4 is joined to the spherical bearing 5 at the tip of the rod of the hook vertical cylinder 6 by a pin, and the main body of the hook vertical cylinder 6 is fixed to the upper surface of the flange A7.

The sealing material 9 is mounted in the groove of the flange, and there is no problem whether this mounting location is the flange A7 or the flange B8. It is sufficient that the hook 3 has the number of ordinary flanges and bolts.
The number of attachments is such that the sealing ability of the sealing material 9 between the flange A7 and the flange B8 can be exhibited, and a set of hooks 3
In order to stably move up and down, it is sufficient that about 8 are provided. The overturn prevention roller 14 attached to the hook beam 4 guides the up-down stroke of the hook up-and-down cylinder 6, and prevents the hook beam 4 from falling over from the upper vacuum tank steel 10 to the outside.

[0008] Because of the above-described configuration, the following procedure is performed to remove the flange B8. Normally, during removal work, a special trolley (not shown) is placed in the lower tank 1
2 (see FIG. 3), stop it, and raise a dedicated lifting device (not shown) equipped with a spring to lower the lower tank 1
2, and the lower tank is pushed up by this spring force. At this time, the lower tank and the flange of the upper tank 11 are in close contact with each other. In this state, the hook up / down cylinder 6
When the hook beam 4 is lowered,
The hook 3 connected with the pin is lowered, and the flange B
A gap for swinging is formed between the lower surface of the hook 8 and the plurality of hooks 3.

Thereafter, when the rod of the cylinder 1 for swinging the hook is pushed out, the ring 2 for swinging the hook is lowered. Can be. After that, the removed lower tank 12 is lowered by a dedicated elevating device (not shown), transported to a repair shop by a trolley, and replaced with a new one. Next, when a new lower tank 12 is attached, the flange B8 is pressed against the flange A7 by using a dedicated elevating device (not shown) in the same manner as the removal operation. Here, this dedicated lifting device (not shown)
A simple pressing guide type centering device (not specified because a general mechanism can sufficiently cope) is provided for adjusting a stop position error of the bogie, a mounting position error of the lower tank, and the like. For this reason, the outer peripheral end of the flange B8 can be centered so as to match the outer peripheral end of the flange A7.

Thereafter, the hook 3 is swung to the lower surface of the flange B8 by operating the hook swinging cylinder 1 and the hook up-and-down cylinder 6, respectively.
8 and can be further pressed against the flange A7. Further, the seal between the two flanges is ensured by the seal material 9. Further, as a measure against uncertainty of the sealing effect due to thermal expansion or the like, it is sufficient to always apply hydraulic pressure or spring force in the direction in which the flange is fastened to the hook up-and-down cylinder 6, and there is no problem that both flanges open. Does not occur.
FIG. 4 is a sectional view of the hook swinging cylinder 1 having a built-in spring.

Further, the hook swinging cylinder 1 has a built-in spring 13 inside the rod side, and the spring force is set so that the rod comes out by hydraulic pressure when the hook is opened. When the hydraulic pressure is lost in an emergency, the rod is retracted by the spring force or the like, and the hook 3 is set so that it can be fixed in the "closed" state by its own weight. "
There is no problem such as a state, and the equipment can be always highly reliable. Flange B due to thermal deformation
8. As a fastening mechanism against the flange deformation of the flange A7, a spherical bearing 5 provided on the hook beam 4 is used.
Thereby, it is possible to follow the flange deformation according to the actual situation, and it is possible to obtain a sufficient sealing effect. Hook swing ring 2
The set gap between the roller and the upper end of the hook 3 is for causing each hook 3 to follow the amount of flange deformation.

In this embodiment, the flange fastening device in the steelmaking vacuum chamber has been described above.
The scope of the present invention is not limited to this. For example, instead of the vacuum tank, the inside of the tank may be a pressurized tank, a normal pressure tank, or the like, and the connection direction of the flanges of each tank may be horizontal instead of downward in the present invention.

[0013]

According to the present invention, as described above, the present invention makes it possible to automatically and securely perform the same fastening of a flange as that of a conventional manual operation by remote operation.
Further, the present apparatus has the simplest configuration, so that it can perform sufficiently at low cost.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing an embodiment of the present invention.

FIG. 3 is a schematic view of a conventional vacuum chamber.

FIG. 4 is a cross-sectional view of a hook swing cylinder incorporating a spring according to the present invention.

FIG. 5 is a front view of a conventional system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hook swing cylinder 2 Hook swing ring 3 Hook 4 Hook beam 5 Spherical bearing 6 Hook up / down cylinder 7 Flange A 8 Flange B 9 Sealing material 10 Upper vacuum tank steel 11 Upper tank 12 Lower tank 13 Spring 14 Fall prevention Roller 15 roller 16 cotter 17 second cotter 18, 19 cam surface 20 rotating gear

Continuing on the front page (72) Inventor Shinichi Fujisawa 1 Oishi, Oita, Oita City, Oita Prefecture Nippon Steel Corporation Oita Works

Claims (1)

(57) [Scope of request for utility model registration] 1. A method for clamping a flange disposed around an end of a tank.
A binding device, arranged a hook swing cylinder barrel of one of the tank is connected via a <br/> pins the rod and hook swinging ring of the cylinder, the end of the other vessel at one end Arranged around
The tops of a plurality of hooks having the other end abutting on a hook beam and being swingably connected to a hook beam and the lower end of the hook swinging ring abut on the end surface of the flange B, and the end of the one tank.
A flange fastening device, wherein a hook moving cylinder is attached to a flange A disposed around the cylinder, and a rod of the cylinder is rotatably connected to a hook beam.