JP2799392B2 - Mounting method of lower tank and intermediate tank in RH furnace - Google Patents

Description

The present invention relates to a method for mounting a lower tank and an intermediate tank in an RH furnace.

[Conventional technology]

Conventionally, when installing the intermediate tank and the lower tank to the upper tank of the RH furnace, the assembled lower tank and the intermediate tank are mounted on a lift truck with a turntable, transported to the lower part of the RH furnace, and The mounting flange at the upper end is brought closer to the mounting flange at the lower end of the upper tank, the turntable is rotated appropriately, the screw core is aligned, and the bolt is tightened.

[Problems to be solved by the invention]

However, if the intermediate tank is displaced in the horizontal or vertical direction, the axis may not be aligned simply by rotating the turntable. In this case, the bogie is moved, or the bogie is moved in a direction perpendicular to the traveling direction. Although it is necessary to adjust the screw core by pulling it and moving it, since the weight of the lower tank and the intermediate tank is more than 10 tons, there is a problem that the work is difficult.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a method of attaching a lower tank and an intermediate tank in an RH furnace that can be performed relatively easily.

[Means for solving the problem]

The method of mounting the lower tank and the intermediate tank in the RH furnace according to the present invention in accordance with the above-mentioned object includes a method in which a plurality of immersion pipes, a lower tank, an intermediate tank, and an upper tank are paired at predetermined positions of the upper tank in the RH furnace. And a receiving bracket is attached to one or both of the lower tank and the intermediate tank in a direction directly below the hanging bracket, and the immersion pipe, the lower tank, and the intermediate tank The assembled body is placed on a receiving stand whose axis is aligned with the RH furnace,
The respective suspension brackets and the opposing receiving brackets are connected by a tension jack, and the unit is suspended vertically by the tension jack, and the screw cores are fixed by matching the screw cores of the opposed mounting flanges.

[Action]

In the method for mounting the lower tank and the intermediate tank in the RH furnace according to the present invention, a plurality of suspension brackets are mounted in advance on the upper tank of the RH furnace, and the lower bracket or the intermediate tank is provided with a receiving bracket opposed to the suspension bracket. The suspension tank is suspended by a tension jack.The suspension tank and the receiving bracket are attached to the center of the screw so that the intermediate tank is suspended in a free state when suspended. Even if the screw centers are misaligned, the screw centers will naturally match.

〔Example〕

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 a side view showing a method of attaching a lower tank and an intermediate tank in an RH furnace to which the method of the present invention is applied, FIG. 2 is a plan sectional view of the same, and FIG. FIG. 4 is a plan view of a truck used in the method, and FIG. 5 is a partial side view showing a state where a lower tank and an intermediate tank are placed on the truck.

First, as shown in FIG. 5, the receiving gantry 11 is placed on a ladle carrier 10 provided with a ladle lifting device (not shown).

A hole 15 into which the immersion tubes 13 and 14 are fitted is formed in a lower portion of the receiving base 11 so as to be aligned with the RH furnace 12. It is assumed that the receiving gantry 11 moves up and down by a certain length similarly to the ladle by driving the elevating device of the ladle cart 10.

Therefore, as shown in FIG.
And the immersion tubes 13 and 14, and as shown in FIG.
Attach four hanging brackets 19 In the suspension bracket 19, holes for mounting a shackle are formed at predetermined positions.

In this state, the receiving bracket 20 facing the hanging position of the hanging bracket 19 is placed on the lower tank 17 (or the intermediate tank 16).
Is fixed by welding. In FIG. 1, the hanging bracket and the receiving bracket on the near side are omitted.

Next, in a state where the immersion tubes 13 and 14, the lower tank 17, and the intermediate tank 16 are assembled, they are detached from the upper tank 18, placed on the receiving gantry 11, transported to another place, repaired, and then assembled again. In this case, the intermediate tank 16, the lower tank 17, and the immersion pipes 13 and 14 are connected in advance, and then placed on the receiving stand 11.

In this case, the immersion tubes 13 and 14 are inserted into holes 15 provided in the receiving gantry 11 to determine the approximate location.

Next, the ladle trolley 10 is moved so that the axis of the intermediate tank 16 and the axis of the upper tank 18 are substantially coincident with each other. The upper mounting flange 21 and the lower mounting flange 22 of the upper tank 18 are brought close to each other.

Thereafter, the upper hanging bracket 19 and the lower receiving bracket 20 are connected by a hanging hardware 24 provided with a tension jack 23 at an intermediate portion. As shown in FIG. 3, the pulling jack 23 is composed of a hydraulic cylinder having upper and lower connecting fittings 25 and 26 mounted thereon, and is adapted to expand and contract by a manual or electric hydraulic pump connected by a hose (not shown). .

In this state, the elevating device is driven to lower the receiving pedestal 11, and the integrated body in which the immersion pipes 13 and 14, the lower tank 17 and the intermediate tank 16 are connected is hung by the plurality of hooks 24.

As a result, the integral object is suspended by the suspension bracket 19 on the upper side, and the natural state is established, so that the screw centers of the mounting flanges 21 and 22 are aligned.

Therefore, the hydraulic pump is driven to gradually shrink the tension jack 23 and abut the upper and lower mounting flanges 22 and 21 in a state where the screw cores are aligned, insert a bolt and screw it into a nut to fix the whole. .

In this embodiment, the receiving bracket 20 is
, But it is also possible to attach it to the intermediate tank 16,
In this embodiment, four hanging hardwares 24 were used.
If the number is more than one, the work can be performed without any trouble.

〔The invention's effect〕

As is clear from the above description, the mounting method of the lower tank and the intermediate tank in the RH furnace according to the present invention suspends the integrated assembly of the dip tube, the lower tank, and the intermediate tank with a tension jack. Therefore, it is easy to match the screw center of the mounting flange to be joined in the suspended state, and the upper and lower mounting flanges can be brought into contact by operating the tension jack, so repair work of the RH furnace can be done. It became very easy.

[Brief description of the drawings]

FIG. 1 is a side view showing a method of mounting a lower tank and an intermediate tank in an RH furnace to which the method of the present invention is applied, FIG. 2 is a plan view of the same, FIG. 3 is a side view of a tension jack used in the method, FIG. FIG. 4 is a plan view of a truck used in the method, and FIG. 5 is a partial side view in a state where a lower tank and an intermediate tank are placed on the truck. [Explanation of Signs] 10 ... Ladle trolley, 11 ... Receiving stand, 12 ... RH furnace, 13, 14
... dip tube, 15 ... hole, 16 ... intermediate tank, 17 ... lower tank,
18 Upper tank, 19 Hanging bracket, 20 Bracket, 21, 22 Mounting flange, 23 Pull jack, 24 Hanging hardware, 25, 26 Connection bracket

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shigeo Kawamoto 111-1 Showa-cho, Kure-shi, Hiroshima Prefecture Inside Kure Office, Kawamoto Construction Furnace Factory (72) Inventor Norio Shiraoka 11, Showa-cho, Kure-shi, Hiroshima Prefecture No. 1 Kawamoto Construction Furnace Factory Kure Sales Office (72) Inventor Yasuhiro Higashijima 1-9-10 Sanno, Yawatahigashi-ku, Kitakyushu-shi, Fukuoka Prefecture Inside Kutsuki Industries Co., Ltd. (72) Inventor Hirofumi Yamaguchi Kitakyushu, Fukuoka Prefecture 1-9-10 Sanno, Yahata-Higashi-ku, Tokyo Inside Kutsuki Kogyo Co., Ltd. (56) References Japanese Utility Model Showa 50-102 (JP, U) Japanese Utility Model Showa 60-37059 (JP, U) Japanese Utility Model Hei 2-87056 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) C21C 7/10

Claims (1)

(57) [Claims] 1. An RH furnace having a pair of immersion pipe, a lower tank, an intermediate tank and an upper tank, a plurality of suspension brackets are previously mounted at predetermined positions of the upper tank, and the lower tank or the intermediate tank is A receiving bracket was attached to one or each of the suspension brackets so as to face directly below the hanging bracket, and the integrated assembly of the dip tube, the lower tank, and the intermediate tank was axially aligned with the RH furnace. Place the unit on a support stand, connect the respective suspension brackets and the opposing receiving brackets with a tension jack, suspend the unit vertically with the tension jacks, align the screw cores of the opposed mounting flanges, and screw A method for mounting a lower tank and an intermediate tank in an RH furnace, characterized by being fixed.