JP2001259811A - Measuring instrument for tundish weight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring instrument for tundish weight which can measure the weight of the tundish with high accuracy. SOLUTION: This measuring instrument is constituted of one pair of supporting frame 40, 40 at the right and the left sides fitted to a tundish car C, one pair of floating frames 50 at the right and the left sides provided with trunnion receivers 52, 53 for receiving trunnion shafts S in the tundish T, one pair of leaf springs 60, 60 at the front and the rear sides connecting both front end and rear end of the floating frames 50 with both ends at the front and the rear sides of the supporting frames 40 and holding the floating frames 50 as the floating state and load cells 70 interposed between the floating framers 50 and the supporting frames 40. The floating frame 50 for supporting the tundish T can remove all of the friction between the trunnion shaft S and the trunnion receiver 52 and outer force caused by this friction by bending the leaf springs 60 at both ends thereof, and to the load cell 70 at the lower part of the floating frame 50, the load in only the perpendicular direction is acted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a tundish weight measuring device. To cast molten steel into the mold of a continuous casting machine, the molten steel is first poured into the tundish from the ladle, moved to the mold, and poured into the mold from the bottom nozzle of the tundish. In order to pour a certain amount of molten steel into the mold, it is necessary to maintain the molten steel at a constant height in the tundish.To maintain the height of the molten steel, measure the weight of the tundish to understand the amount of molten steel There is a need to. The present invention relates to such a tundish weight measuring device.

[0002]

2. Description of the Related Art As a conventional tundish weight measuring apparatus, there is a technique described in Japanese Utility Model Registration No. 25798875. In the prior art including this conventional example, a tundish trunnion shaft is mounted on a trunnion receiver of a tundish car, this trunnion receiver is supported by a load cell, and the weight of the tundish is obtained from an output signal of the load cell. .

[0003]

However, the tundish causes thermal displacement due to the heat of the molten steel, and the trunnion shaft of the tundish causes friction with the trunnion receiver, and as a result, an unbalanced load may occur. For this reason, despite the high load detection accuracy of the load cell itself,
Measurement of tundish weight was not always accurate.

The present invention has been made in view of the above circumstances, and has as its object to provide a tundish weight measuring device capable of measuring the weight of a tundish with high accuracy.

[0005]

According to a first aspect of the present invention, there is provided a tundish weight measuring device comprising a pair of left and right support frames attached to a tundish car, and a pair of right and left floats provided with trunnion receivers for receiving trunnion shafts of the tundish. Frame, the front and rear ends of the floating frame are connected to the front and rear ends of the support frame, and a pair of front and rear plate springs for holding the floating frame in a floating state, interposed between the floating frame and the support frame. And a load cell.

According to the first aspect of the present invention, the floating frame supporting the tundish releases all friction between the trunnion shaft and the trunnion receiver and external force caused by the bending of the leaf springs at both ends thereof. Only the vertical load acts on the load cell below the floating frame. Therefore, the weight of the tundish can be accurately measured, and the height of the molten steel in the tundish can be kept constant.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 3 is a side view of a tundish car C to which the tundish weight measuring device of the present invention is applied, and FIG. 4 is a front view of the tundish car C. Figures 3 and 4
1, only the main body 10 of the tundish car C is schematically shown, and the basic shape of the main body 10 is a U-shape in plan view, and the left and right side bodies 11, 12 and a front body connecting the same. 13 One front wheel 14 is attached to the lower surface of the front body 13, and two rear wheels 15 are attached to the lower surfaces of the rear ends of the side bodies 11 and 12, respectively. It is pointed toward the dish carrier. The front rotation 14 and the rear rotation 15 are mounted on the rail 2 so as to freely roll.

On the front body 13 of the tundish car C, a traveling device including a traveling motor 16, a reduction gear 17, a transmission shaft 18 and the like is mounted.
The rotational power is transmitted by the like. Each body 1
Guide posts 21 and 22 and 31 and 32 are provided upright at both ends in the running direction of the left and right support frames 4 and 12, respectively.
The right support frame 40 is vertically movable between the guide posts 31 and 32. With such an arrangement, each support frame 40 is arranged parallel to the traveling direction. The respective side bodies 11, 12
Frame elevating device 2 constituted by a worm jack or the like between
4,34 are installed. This frame lifting device 2
The motors 4 and 34 can be independently driven by motors 25 and 35 provided separately on each side body.

The tundish T is provided with four trunnion shafts S protruding laterally, and the tundish T is loaded on the support frames 40, 40. Therefore, each support frame 40,
If the vertical positions of the 40 are different from each other, the loaded tundish T can be tilted in the front-rear direction. Therefore, it is easy to adjust the immersion nozzle mounted below the tundish T vertically in the mold.

Now, a tundish weight measuring apparatus according to this embodiment will be described. FIG. 1 is a side view of a tundish weight measuring device according to an embodiment of the present invention, and FIG. 2 is a plan view of the tundish weight measuring device. As shown in FIGS. 1 and 2, the tundish weight measuring device of the present embodiment includes a support frame 40, a floating frame 50, a leaf spring 60, and a load cell 70.

First, the support frame 40 will be described. FIG.
As shown in the figure, between the guide posts 31 and 32 and between the guide posts 21 and 22 of the tundish car C,
The support frames 40, 40, which are concave in side view and whose center portions are lower than the front and rear ends, are attached to the front and rear ends.

Next, the floating frame 50 will be described. 1 to 3, reference numeral 51 indicates a horizontal base. A pair of front and rear trunnion receivers 52 and 53 are attached to the upper surface of the base 51. Each of the trunnion receivers 52 and 53 is for receiving the trunnion shaft S of the tundish T.

Next, the leaf spring 60 will be described. Figures 1-2
As shown in FIG. 3, a pair of front and rear holding members 61, 6
1 are respectively attached. Outer ends of the pair of front and rear leaf springs 60 are attached to the pair of front and rear holding members 61, 61, respectively. A pair of front and rear leaf springs 6
0, 60, the base 51 of the floating frame 50
Is mounted horizontally. Therefore, the floating frame 50 can be held in a floating state by the pair of front and rear leaf springs 60.

Next, the load cell 70 will be described. A pair of front and rear load cells 7 is provided between the upper surface of the central portion of the support frame 40 and the lower surface of the base 51 of the floating frame 50.
0, 70 are interposed. The weight of the tundish T is determined from the output signal of each load cell 70.

Next, the operation and effect of the tundish weight measuring device of the present embodiment will be described. The floating frame 50 supporting the tundish T can release all the friction between the trunnion shaft S and the trunnion receiver 52 and the external force caused by the bending of the leaf springs 60 at both ends thereof. Only the load in the vertical direction acts on the lower load cell 70. For this reason, Tundish T
Can be accurately measured, the height of the molten steel in the tundish T can be kept constant, and the height of the molten steel in the tundish can be kept constant.

As described above, according to the tundish weight measuring apparatus of the present embodiment, the weight of the tundish T can be measured with high accuracy, and the height of the molten steel in the tundish T can be kept constant. It works.

[0017]

According to the first aspect of the present invention, the floating frame supporting the tundish is capable of reducing all friction between the trunnion shaft and the trunnion receiver and external force caused by the bending of the leaf springs at both ends thereof. It can be released, and only the vertical load acts on the load cell at the bottom of the floating frame. Therefore, the weight of the tundish can be accurately measured, and the height of the molten steel in the tundish can be kept constant.

[Brief description of the drawings]

FIG. 1 is a side view of a tundish weight measuring device according to an embodiment of the present invention.

FIG. 2 is a plan view of the tundish weight measuring device according to one embodiment of the present invention.

FIG. 3 is a side view of a tundish car C to which the tundish weight measuring device of the present invention is applied.

FIG. 4 is a front view of a tundish car C to which the tundish weight measuring device of the present invention is applied.

[Explanation of symbols]

 Reference Signs List 40 support frame 50 floating frame 52 trunnion receiver 53 trunnion receiver 60 leaf spring 70 load cell C tundish car T tundish S trunnion shaft

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G01G 13/00 G01G 13/00 KR 17/04 17/04 B 19/12 19/12 Z

Claims (1)

[Claims] 1. A pair of left and right support frames attached to a tundish car, a pair of left and right floating frames provided with trunnion supports for receiving trunnion shafts of the tundish, and front and rear ends of the floating frame at the front and rear of the support frame. A pair of front and rear leaf springs connected to both ends and holding the floating frame in a floating state, and a load cell interposed between the floating frame and the support frame, a tundish weight measuring device. .