JP2000334551A - Device for supporting molten metal surface level meter in mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a supporting device of a molten metal surface level meter in a mold which supports the molten metal surface level meter for measuring the molten metal surface level of molten metal in the mold from the upper part of a tundish car frame. SOLUTION: An arm base 13 of the supporting device of the molten metal surface level meter in the mold is turned while shifting to the front and the rear parts so as to be able to freely position the molten metal surface level meter 11 on the straight line in the longitudinal direction of the mold, and also, a movable base 7 fixing the arm base 13 with a fixed device 8 is inclined by supporting this end part with a pin 6 to elevate/lower the molten metal surface level meter 11 through an arm 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a level gauge used for controlling the level of molten steel in a mold in a continuous casting machine.

[0002]

2. Description of the Related Art Generally, an eddy current sensor based on eddy current is used for controlling the level of molten steel in a mold, and this sensor (level gauge) is fixed above the level of molten steel. 2. Description of the Related Art A method of measuring a level of a molten metal in a mold by measuring a distance between a surface and a sensor (level gauge) has been performed.

Conventionally, as a method of fixing the level gauge above the mold, there has been a method of setting an arm having a level gauge at the tip thereof on a mold cover by an operator's hand before starting casting. I have. Further, a tundish car method is usually employed for exchanging the tundish, and a method of fixing an arm to a frame of the tundish car is also known.

[0004]

However, in the former method of setting the arm on the mold cover, it is necessary for the operator to approach the immersion nozzle in a hot state immediately before the start of casting, which is a very dangerous operation. In addition, since the work is performed after the tundish car is set at the casting position, not only can the auto start be made impossible to automate, but also the arm setting work takes time, so the casting time is long. There is also the problem of becoming.

[0005] On the other hand, in the latter method of fixing the arm to the frame of the tundish car, when the tundish car travels, the sensor portion and the mold cover interfere with each other, and the sensor (level gauge) is damaged. Will occur. Further, if the arm is completely fixed to the tundish car, it becomes impossible to change the position of the sensor (level gauge) with the change in the width of the mold.

In order to accurately measure the level of the molten metal in the mold, it is necessary to always set the position of a sensor (level gauge) at a fixed position from the end in the width direction of the mold. Once you have completely fixed
This adjustment cannot be made. The present invention solves the above-described problems, enables an automatic start at the start of pouring, and prevents a sensor (fluid level meter) from interfering with a mold cover and a sensor (fluid level) accompanying a mold width change. It is an object of the present invention to provide an apparatus for supporting a level gauge in a mold that can freely change the position of a level gauge.

[0007]

SUMMARY OF THE INVENTION The present invention is an apparatus for supporting a level gauge for measuring a level of molten steel in a mold from above a tundish car frame, the apparatus comprising: An arm for holding the surface level meter at one end, an arm base on which an arm clamp for locking the other end of the arm is mounted, and at least one pair of guide pins provided at a lower portion of the arm base. A fixing device projecting from a lower portion and at least one pair of guide grooves for guiding the at least one pair of guide pins are provided on the upper surface at different angles from each other, and the arm base is provided along the guide grooves. By rotating the fixing device provided at the lower part while moving it back and forth, the level gauge is freely positioned on a straight line in the longitudinal direction of the mold, and the arm base is fixed by the fixing device. A movable level support device in a mold, comprising: a movable base; and an elevating device that tilts the movable base by pivotally supporting its end with a pin, and raises and lowers the level gauge through an arm. By doing so, the above problem was solved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a side view of the apparatus for supporting a level gauge in a mold according to the present invention. Sensor (level gauge) 11 for measuring the level of molten steel 15 in mold 1
Is held at one end of the arm 10. The other end of the arm 10 is locked by an arm clamp 9. Here, a counterweight 12 is attached to balance the entire arm.

The arm clamp 9 is mounted on an arm base 13, and a fixing device 8 is provided below the arm base 13. As the fixing device 8, for example, a fixing magnet can be used. The fixing magnet is a magnet having an on / off function. When adjusting the position of the arm base 13, the arm base 13 can be freely moved by turning off the attracting force of the magnet.

Here, at least a pair of guide pins 22 project from the lower part of the fixing device 8 and are guided by guide grooves 21 provided corresponding to the movable base 7. Details of the guide pin and the guide groove will be described later.
The movable base 7 is supported by a pin 6 provided at an end thereof, and can be freely tilted by using the elevating device 5. Here, in FIG. 1, the movable base 7 is tilted by the elevating device 5, and the state raised above is shown by a two-dot chain line. However, a part of the description by a two-dot chain line is omitted for the sake of clarity of the drawing.

As the lifting device, for example, an air cylinder can be used. By incorporating the on / off control of the operation of the air cylinder into a sequence or the like, the tundish car can be raised during the movement of the tundish car, and The sensor (metal level gauge) can be automatically set by lowering while being set at the pouring position. In this way, the automatic start of the level control can be easily realized without the intervention of the operator.

The chain 14 has a function of an upper limit stopper when the movable base 7 is tilted. By adjusting the length of the chain, the range of elevation of the level gauge 11 can be freely adjusted. It is possible to adjust. For example, FIG.
When an air cylinder having a stroke of 35 mm is used as the lifting device 5 in the device for supporting a level gauge shown in FIG. 1, the sensor (level gauge) 11 at the tip of the arm can also move up and down about 300 mm. There is no interference with the mold cover even when running the dish car.

Since the level gauge 11 can be raised and lowered in this way, the fixed base 4 of the apparatus for supporting a level gauge in a mold according to the present invention can be installed on the tundish car frame 3, and the tundish car The level gauge 11 and the arm 10 do not interfere with the mold cover 2 during the movement. Further, as shown in FIG. 2, the apparatus for supporting a level gauge in a mold of the present invention can move and position the level gauge 11 on a straight line in the longitudinal direction of the mold in response to a change in the mold width. It is characterized by the following. Here, reference numeral 16 denotes the position of the tundish nozzle (that is, the approximate center position of the mold).

In order to keep the precision of the level gauge constant even by the movement of the movable side wall 1a on the shorter side of the mold due to the change of the mold width, the position of the level gauge 11 is changed to the movable side wall.
It is necessary to adjust the position so as to be a fixed position from 1a. This position adjustment method will be described with reference to FIG. The movable base 7 is provided with at least one pair of guide grooves 21 at different angles. Although FIG. 3 shows a pair of guide grooves, it is needless to say that a plurality of pairs may be provided. In that case, the corresponding guide pins 22 are also provided with a plurality of pairs.

By turning the arm base 13 while moving the arm base 13 forward and backward, for example, along the guide pins 22 along the guide grooves 21, the level gauge 11 can be moved linearly in the longitudinal direction of the mold. You can. Here, guide groove 21
Length and angle are determined by appropriately adjusting the linear moving distance of the level gauge 11, the length of the arm 10, the mounting position of the fixed base on which the movable base 7 is mounted on the tundish car frame, and the like. .

The position adjustment of the level gauge performed when the mold width is changed is easily performed by the operator manually turning off the switch of the fixing magnet which is a fixing device and moving the movable base 7 along the guide groove. Can be realized.

[0017]

As described above, according to the present invention,
By enabling the level gauge support device to move up and down, interference between the level gauge and the mold cover during tundish car travel could be eliminated. In addition, smooth auto-start was enabled, automatic operation was realized, and the time between castings was shortened.

Further, the position of the sensor (level gauge) can be freely changed in accordance with the change of the mold width, and accurate level measurement of the level in the mold can be realized.

[Brief description of the drawings]

FIG. 1 is a side view of a device for supporting a level gauge of the present invention.

FIG. 2 is a plan view of the apparatus for supporting a level gauge of the present invention.

FIG. 3A is a plan view and FIG. 3B is a side view of a movable base that is a main part of the present invention.

[Explanation of symbols]

 Reference Signs List 1 mold 1a movable side wall 2 mold cover 3 tundish car frame 4 fixed base 5 lifting device (air cylinder) 6 pin 7 movable base 8 fixing device (fixing magnet) 9 arm clamp 10 arm 11 sensor (level gauge) 12 Counter weight 13 Arm base 14 Chain 15 Molten metal (Molten steel) 16 Tundish nozzle 21 Guide groove 22 Guide pin

Claims (1)

[Claims] An apparatus for supporting a level gauge for measuring a level of molten steel in a mold from above a tundish car frame, wherein the level gauge is supported at one end. And an arm base on which an arm clamp for locking the other end of the arm is mounted.
A fixing device in which a pair of guide pins protrudes from a lower portion, and at least one pair of guide grooves for guiding the at least one pair of guide pins are provided on the upper surface at different angles from each other. By moving the fixing device disposed at the lower portion of the arm base while moving it back and forth, the metal level gauge is freely positioned on a straight line in the longitudinal direction of the mold, and the arm base is fixed by the fixing device. A movable base to be moved, and a lifting device for tilting the movable base by pivotally supporting its end with a pin, and raising and lowering the level gauge via an arm. .