CN201227681Y - Apparatus for measuring casting powder thickness and liquid level fluctuation - Google Patents

Abstract

The utility model relates to a device for measuring the thickness of the protecting slag and the molten steel surface fluctuation. The device comprises a handle, a cover plate and a probe. The handle is arranged in the middle of the upper surface of the cover plate; and the probe is fixed on the lower bottom of the cover plate. After an iron wire is inserted in the protecting slag, a part of the iron wire which contacts with molten steel melts and a part of the iron wire which contacts with the protecting slag has different conditions: protecting slag in a molten slag layer is attached to an unmelted iron wire so as to enable the iron wire to has a certain brightness; and carbon in a sintered layer is attached to the iron wire so as to enable the iron wire to turn black. According to the principle, the thicknesses of the molten slag layer, the sintered layer and a powder slag layer which exist in the protecting slag. After the iron wire which contacts with the molten steel naturally melts, the residual iron wire is in the shape of a wave; and the difference between the length of the longest iron and the length of the shortest iron wire is measured, that is the maximum value of the molten steel surface fluctuation. The utility model has the advantages of simple structure, convenient use, and accurate measuring result and can be widely applied to the monitoring of the molten steel surface and the measurement of the thickness of the protecting slag.

Description

A kind of device of measuring covering slag thickness and liquid fluctuating

Technical field

The utility model relates to a kind of measurement mechanism, particularly a kind of device of measuring covering slag thickness and liquid fluctuating.

Background technology

Along with development of science and technology, require more and more higher to steel product quality.The level control The Application of Technology can improve molten steel face control accuracy and slab quality in the crystallizer on the one hand, also can greatly improve tundish operative employee's working environment on the other hand, reduces the accident rate of casting cycle.Liquid level fluctuation of crystallizer can make covering slag be involved in the molten steel, causes the quality problems of strand, causes bleed-out or excessive steel when serious.Mold liquid level detects isotope formula, electromagnetic type, electric vortex type, laser type, thermojunction type, ultrasonic type, the industrial television method etc. of mainly containing.Wherein, isotope formula and current vortex level detection technology adopt more aborning.Above-mentioned detection mode can only a bit be carried out surge detection longitudinally to certain of liquid steel level, but liquid fluctuating have certain continuously, randomness, therefore, be difficult to capture the maximum of full liquid fluctuating.

Measure the method for covering slag liquid slag layer thickness now; generally all adopt probe method; such as " a kind of testing tool of crystallizer protecting residue and detection method thereof " (application number 200410089438.8); this kind method is that certain of liquid slag layer is a bit measured; the measuring position more at random, it is bigger influenced by human factor.Operator measuring position and probe angle all can produce considerable influence to measurement result; if can not measure the maximum of liquid fluctuating; will cause the operator can not hold the melting state of covering slag accurately and timely; processing parameter is regulated has certain hysteresis quality, can cause certain harmful effect to the production direct motion when serious.

Summary of the invention

The utility model has overcome deficiency of the prior art, and a kind of simple in structure, device that testing result is measured covering slag thickness and liquid fluctuating accurately is provided.

In order to address the above problem, the utility model by the following technical solutions:

A kind of device of measuring covering slag thickness and liquid fluctuating, this device is made up of handle, cover plate and probe, and handle is arranged on the cover plate upper surface middle part, and probe stationary is at the cover plate lower surface.

Described handle adopts nonflammable and material fusion is made.

Described cover plate adopts heat-insulating material to make, and its surface size requires the full surface of covering protection slag or half side surface, and its thickness requirement is after it covers on the covering slag surface, and the cover plate upper surface is no more than the crystallizer upper edge and is advisable.

Described probe adopts iron wire to make, and its length requirement is greater than covering slag crucible zone thickness.

Compared with prior art; the beneficial effects of the utility model are: the utility model device is provided with some iron wires; during detecting operation; this device is inserted in the crystallizer; can measure the liquid slag layer thickness and the liquid fluctuating of each position on the mold liquid level accurately; reach accurate control covering slag melting structure, reduce the purpose of liquid fluctuating.

Description of drawings

Fig. 1 is the utility model front view

Fig. 2 is Fig. 1 vertical view

Fig. 3 is Fig. 1 left view

The specific embodiment

See Fig. 1, Fig. 2, Fig. 3, a kind of device of measuring covering slag thickness and liquid fluctuating, this device is made up of handle 1, cover plate 2 and probe 3, and handle 1 adopts materials nonflammable and fusion such as iron plate, batten to make, handle 1 is arranged on cover plate 2 upper surface middle part, is used for this device of handling; Cover plate 2 is looked crystallizer or casting blank section decision surface size, must can full surface of covering protection slag or half side surface, thickness is with after covering on the covering slag surface, and cover plate 2 upper surfaces are no more than the crystallizer upper edge and are advisable, and material can be chosen fixedly iron wire and adiabatic material such as plank; Probe 3 is fixed on cover plate 2 lower surfaces, and length must be greater than covering slag crucible zone thickness, and material can be chosen common iron wire.

The covering slag three-decker has formed certain thermograde, is followed successively by from top to bottom: liquid slag layer, sinter layer and slag layer.After iron wire inserts covering slag, the partial melting that contacts with molten steel, present different situations with the part of covering slag contact: the covering slag of liquid slag layer hangs on the unfused iron wire, makes iron wire have certain brightness; Carbon in the sinter layer hangs on the iron wire, can make this iron leg silk color blackening.According to this principle, just can measure the thickness of liquid slag layer, sinter layer and slag layer in the covering slag.

After the iron wire that contacts with molten steel melted naturally, remaining iron wire undulate shape was measured the difference of the longest iron wire and the shortest iron wire, promptly is the maximum of liquid fluctuating.

Below in conjunction with accompanying drawing and with section is that the strand of 230 * 1150mm is an example, and dimensional structure of the present utility model is described further:

Casting machine section 1150mm, the mouth of a river one side length is 575mm, and is more active apart from mouth of a river 150mm place liquid level, can accident, thus cover plate to get 425mm proper; The mold liquid level width is 230mm, and the easy slagging scorification bar in crystallizer both sides 20mm meniscus place is so get 190mm.According to the dimensional structure of above strand, be raw material with wooden materials (plank), cover plate is made long 425mm, wide 190mm, the cuboid of thick 20mm.

Probe 3 adopts the equidistant arrangement of 3 row, 5 row 60mm, and material is a common iron wire.If spacing is too little, then local temperature is too low, and iron wire can not melt fully, easy dross, and spacing too greatly then can not specifically reflect liquid fluctuating.The covering slag gross thickness generally is controlled at about 60mm, and iron wire length is slightly larger than covering slag thickness and gets final product, and the iron wire protruded length of making is 70mm, guarantees that iron wire inserts molten steel.Probe 3 hammers into cover plate 2 from top to bottom from handle 1 place face and gets final product.

Handle 1 is selected iron plate for use, is fixed on the cover plate intersection of diagonal.

Claims (4)

1, a kind of device of measuring covering slag thickness and liquid fluctuating is characterized in that, this device is made up of handle (1), cover plate (2) and probe (3), and handle (1) is arranged on cover plate (2) upper surface middle part, and probe (3) is fixed on cover plate (2) lower surface.

2, a kind of device of measuring covering slag thickness and liquid fluctuating according to claim 1 is characterized in that, described handle (1) adopts nonflammable and material fusion is made.

3, a kind of device of measuring covering slag thickness and liquid fluctuating according to claim 1; it is characterized in that; described cover plate (2) adopts heat-insulating material to make; its surface size requires full surface of covering protection slag or half side surface; its thickness requirement is after it covers on the covering slag surface, and the cover plate upper surface is no more than the crystallizer upper edge.

4, a kind of device of measuring covering slag thickness and liquid fluctuating according to claim 1 is characterized in that, described probe (3) adopts iron wire to make, and its length requirement is greater than covering slag crucible zone thickness.

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