DE2023901B2 - ARRANGEMENT FOR REGULATING THE SPEED OF EXHAUST OF A MELT FROM A CONTAINER - Google Patents

Description

1 '2

The development concerns an arrangement for regulating the flatness of the IjTn η nc at a certain angle

the outflow velocity of a melt from above is directed. Around the pipe is a so-called

a container consisting of a multi-phase electromagnetic valve 14-15 or pump with

fed, electromagnetic valve, which has one or more, e.g. two, three or mchrphnsen-

Surrounding the flow opening of the container, which is arranged from a 5-fed coils 14, which optionally

attached to the lower part of the container and surrounded at an angle by a laminated core or an iron core

there is an upwardly directed pipe. _ are. The electromagnetic pump or valve

An arrangement of the type described is on and are of a known type, e.g. B. as in the above

known for itself, z. As shown by UK patent specification in which a migratory field

Scripture 728 145. It shows a container with an io with a direction dependent on the phase sequence

Bottom tap, which is generated by an electromagnetic, that exerts a force on the melt in

Nichrnhascngespcislcn valve is surrounded. The valve of the coil exerts the force on the runner of a

is supposed to be a magnetic wall in the melted steel of an asynchronous motor with a three-phase-fed stator

bring about a force in upward or corresponding. With the laminated core 15 you get a

downward direction for the melt of 15 20 ⁿ / ₀ ige or even greater force increase iuf the

the same type generated in a multiphase melt in the tube 13 than in a coil without

fed .Siindcr an asynchronous motor on the iron core with the same current in the coil

Runner acts. You want z. B. with who is in this way.

The force generated regulates the tapping of the container.

and in certain cases stop altogether, but it has to be provided with multiple pipes ao pouring

lent shown that one can also use a relatively small amount of each of an electromagnetic valve

A very strong field is surrounded by the melting line in the container.

ten oily. With a melt flow rate of 0.8 m, for example, the melt in the ladle 11 ^r : oll over the pipe Π

is a pressure to stop the tapping from and via an intermediate pan or tap container 16

34 100N / m ^: required what the described 25 or in another way in a mold 17, a

Makes order practically unsuitable. other pan etc. are filled, e.g. B. in cooperation

From the German utility model 1 880 024 menhang with continuous casting (see Fig. 1). You want

is a casting container for casting molten liquids> :. B. regulate the tapping of the pan or

Metals known with a discharge opening that control that one the g; anze time when pouring a

starts from the lowest part of the container and receives a certain value 30, such as. B. a constant

avenge up to the highest «. .1 Badspicgel extends level in the form 17 or a constant weight

and with an electrodynamic conveying device in a tundish 16 or a certain

for liquid metal is provided. Even with this varying value during melting, e.g. B.

known conveyor device is at a relatively varying target values for the tundish weight

low melting depth in the container a very powerful 35 depending on the respective level in the mold 17.

The level in the form 17 can be applied to many

Container to be able to promote what. large and expensive and per se known species are scanned, such as

Makes epulcn arrangements necessary. z. B. with a contact level 18, an X-ray

The invention aims to improve the gene knife, a photocell controlled knife, etc.,

The valve described above and is thereby identified 40 and the output signal from this indicator 18 is

Draws that the upper end of the tube is fed considerably to a regulating device 19, the output of which

(Above the bottom of the container, but also significantly (reinforced) a voltage regulator arrangement 20,

(below its upper edge, i.e. the maximum e.g. a regulating transformer, an induction

{■ chmelzcnspicgcls lies that the electromagnetic regulator, a potentiometer, etc. for multi-phase: n '<. Echscl-

Ycntil surrounds the tube and that · the coil or the 45 current supply of the coil or coils 14 of the electro-

Controls the valve actuation in a manner known per se with a magnetic valve.

a voltage are fed, which in phase sequence In F i g. 2 is a weight tiger 11 for the

And size rcgel- and reversible and is shown in dependent- intermediate socket 16, with the exterior of the

kcit of the level of the melt in a casting mold · indicator (weight clsr ladle 16 plus intermittent

or in a pouring ladle or the weight of a molten content) fed to a control device

To be filled pan or the like. Is controlled. becomes, as is the case with the level indicator according to FIG. 1

By means of such an arrangement one can also do so.

with a relatively moderate field in the desired heat, high smoothness, in the bochiltcr or

Control the extent of the tapping and possibly one of the pan 11 will dnc such phase sequence and automatic tapping from high to low voltage in the valve 14-15 selected, this one

Sclimclzcnnivcaiis received. receives a force towards the container 11, which the property

In the exemplary embodiment of the arrangement, the pressure of the melt is counteracted by the

the following is described in more detail with reference to the drawing. Tension decreased, one can gradually

This shows a controllable tap from the planned

Fig.] The drawdown of the melt obtained from a 60 (p. 22), and by turning the tension on

Container, whereby the tapping lowers from a level zero and they after phase rotation again

indicator is controlled, and increases, the tapping may increase. The vote

F i g. 2 the control depending on the weight. of voltage and phase sequence (direction of force)

an intermediate pan or an intermediate container. be regulated so that one z. B, on measuring device 18

In P i g. 1 is a pan 11 or an oven with $ 6 constant level or constant weight

an opening 12 in the lower part of the pan is shown in the intermediate pan,

to which a pipe 13 is connected, which in the Vcr * The weight display 21 can be of a known type

relation to a horizontal plane or the ground · be, such as B. a majjnetostrictive indicator ^{1 of} the in

of the Swedish patent specification 151 267 shown (German patent specification 955 272).

With the help of the tube 13 and the electromagnetic valve 14-15 one can with relatively idle time Easily control the output of the Schnielzcnahzapfen even with a large Schmrhcntiefun in the pan 11. Of the The angle λ between the pipe Π and a vertical axis should be between 10 and 30 °, expediently He is about 12 to 23 \ and the highest level of the tube at about half the maximum melt level height. The force is supposed to work downwards at the beginning of the tapping process in order to gradually decrease and then to be turned around and increased when a constant Level should be maintained.

The following example can be given:

ζ Length of the valve: 3.6 m

Angle ν - 15 ^r , frequency for three-phase voltage to the coil 14 = 50 Hz
Apparent power in the coil = 2720 kVA. Active power = 450 kW
Voltage (main) = 372 V

When feeding to the pan 11 (down in the pipe 13) and a force of 26,000 N / m ³ , the tapping in the electromagnetic valve can be stopped.

The length of the valve is 3.6 m, this gives a pressure of 26 000-3.6 = 93 600 N / m ', again a melt depth of

9600

: - = 1.38 m

9.81 -6900
is equivalent to.

With such a valve it is possible to tap through the pipe 13 at a melt level counteract this up to 1.38 m above the melting surface in the valve when it is completely filled. If, after pouring the pan up to the level of the valve mouth, the direction of force of the If the valve is reversed, the valve can be metal up to a level of 1.38 m below the valve mouth Salt from the container.

A nozzle 23 or lip for the melt can be attached to the pipe.
With a melt level in the ladle 11 below the highest level of the pipe 13, of course, no force needs to be exerted on the melt in the ladle 11, not even when the tapping is completely stopped.

ίο The above arrangement can be used in the framework of the following claims can be varied in many ways.

Claims (2)

Patent claims: 1. Arrangement for regulating the outflow speed of a melt from a container, Consists of a of the container, which consists of one at the bottom ao part of the container attaching and obliquely upward pipe consists, thereby characterized in that the upper end of the pipe, (13) is well above the bottom of the container (11), but also significantly below its upper edge, i.e. H. of the maximum melt level lies that the electromagnetic valve (14-15) surrounds the tube (13) and that the coil or the coils (14) of the valve in a manner known per se Way are fed with a voltage that can be regulated and reversed in phase sequence and size is and depending on the level of the melt in a mold (17) or in a The pouring ladle or the weight of an intermediate ladle (16) to be filled or the like. Is controlled. 2. Arrangement according to claim 1, characterized in that the electromagnetic valve has such a length that it extends from a level near the bottom of the container (11) up to a level of approximately det half the height of the container (IA) extends or up to half the height of the maximum filling. 1 sheet of drawings