DE526858C - Deep holder for electrodes when the electric oven is closed - Google Patents

Description

GERMAN EMPIRE

ISSUED ON U. JUNE 1931

REICH PATENT OFFICE

PATENT LETTERING

CLASS 21h GROUP

L G. Farbenindustrie Akt.-Ges. in Frankfurt a. M. *)

Deep holder for electrodes in closed electric ovens Patented in the German Empire on December 29, 1925

The usual setting of electrodes, especially carbon electrodes in electrical ovens, is the one that the electrodes are exposed to the development of heat (e.g. electric arc) opposite end by any means with the metallic power supply lines be connected, such as B. by nippling, by pressing or clamping jaws and the like.

It is only recently that open furnaces have been used, of which the carbide furnace type is the first Line mentioned, it made up most of the electrode resistance, the the carbon electrode 'has within the distance between the socket and the hot end, to be bridged or switched off and has come to a formation of the frame, where the jaws are as deep as possible, d. H. sit on the electrode near the reaction center; the burning of the Here, heavily exposed metal parts is prevented that these metal parts through a stream of water can be strongly cooled from the inside. It thus emerges from the cooled Clamp the short distance of the glowing electrode directly into the reaction material inside, the upper part of the electrode is exposed to cooling by radiation and air flow.

Such measures are usually required for closed ovens with an open hearth not necessary because it penetrates from the outside through the vault of the furnace Electrode along its entire length down to the herd by radiation and by the high temperature of the gases filling the furnace sufficiently hot, d. H. usually at least on red heat, so that with carbon electrodes the resistance through the increased specific conductivity in the heat is significantly reduced.

However, there are also cases of the use of closed ovens in which such The electrode part protruding into the furnace is not heated because the electrode more or less completely from a relatively cold and poorly conductive charge is surrounded. In consideration of the need to lead the electrode through an opening that may have to be sealed in the ceiling of the furnace, in the order of magnitude of the electrode diameter and further in consideration of the unimpeded mobility the electrode within the bulk of the charge can, however, here a version of the type described above for carbide furnaces cannot be used.

It has now been found that the problem, in closed, feed-filled Furnaces to introduce a deep-seated electrode holder and without difficulty

* l The patent seeker stated as the inventor:

Jakob Dion in Bitterfeld.

easily controllable to keep in operation can be solved according to the invention. The invention consists in the fact that when the electrode is deepened, the entirety of the power supply mediating components, insofar as they are within the furnace, of a protective jacket is surrounded, the dimensions of which are chosen with the proviso that the loosening and pressing of the current-carrying ίο parts (clamping jaws) are guaranteed. A pipe is usually used as a protective jacket made of a metal suitable for the given case can be used, but can also tubes made of graphite and others. come into question. This can protect the user if necessary coolable jacket both against the action of the gases with respect to a chemical reactivity or their Temperature as well as directed against the action resulting from direct contact the electrode with the charge could result.

Deep sockets of this type can naturally also be used in closed ovens with more or less free stove surface can be used. One can use deep sockets according to Apply the invention for electrodes of any known type and design.

In the drawings, some designs for deep mounts are shown as examples Invention shown. This concerns the formation of the version according to the principle of the loose wedge: Fig. 1 and 2 left half; of the simple lever: right half; the wedge jaws: Fig. 3 and 4; of the torsion lever: Figs. 5 and 6. Others of the numerous further options, e.g. B. on the type of band brakes and others, have not been shown here.

. .

example

Use of the lever principle (Fig. 1 and 2 right half).

A carbon electrode α is inserted into a metal tube b, which at its lower end carries the inwardly projecting, hollow head c through which water flows and which surrounds the electrode with little play. Just above this head c , the electrode is gripped by a number (e.g. four) clamping jaws d, which are individually moved by levers e _t , which are raised within the tube b via pivot points / j and at the upper end of b by known ones Means such as B.

Screw spindle If ₁ , can be controlled from the outside. In this way, the pressure of the clamping jaws on the electrode can be regulated as desired. Tube b is closed at the upper end by a cover i , which is expediently designed as a stuffing box. The power is supplied to the jaws d within tube b with the aid of connecting terminals at h from cables (not shown) which, if necessary, simultaneously allow the electrode to be suspended in any way. Inside the tube b , tubes (not shown) leading to and from the protruding head c and the tubes /, which may optionally be identical to h , are housed for the water supply and discharge to the clamping jaws. The finished electrode, including the protective jacket, can be inserted into the furnace through a stuffing box so that the screws g _{1 can} still be operated. The electrode is released by loosening the clamping jaws, so that both it and the entire electrode holder can be adjusted independently of one another.

In an analogous manner, in Fig. 1 and 2, the left half e denotes the rotatable tie rod, / the counter bearing of the loose wedge, g the nut for actuating the tie rod. Furthermore, in Fig. 3 and 4, e ₂ denotes the pull rod with the distance tube surrounding it /, g ₂ and g _z the screws for pressing and releasing the socket. In Fig. 5 and 6, shaft <? ₃ the clamping jaws by means of the brackets p and the arms 0, to which the latter correspond at the upper end of the electrode arms, which are operated as torsion _{levers by g "4} in the sense of loosening or pressing the jaws.

Claims (2)

Patent claims: i. Deep socket for electrodes in closed electric ovens, in which the actuation of the holding organs takes place with the aid of parts thereof led out of the furnace, thereby characterized in that the entirety of the power supply mediating components, as far as they are inside the furnace, is surrounded by a protective jacket that can be cooled if necessary. 2. Low version according to claim 1, characterized in that the lower Completion of the jacket is designed as a cooling device. 1 sheet of drawings