FR2542962A1 - CONTACT HEAD FOR ELECTRODE HOLDERS OF ELECTRIC ARC FURNACES - Google Patents

Abstract

THE CONTACT HEAD FOR ELECTRODES HOLDER INCLUDES A BODY 13 ON WHICH SOCKETS 1 ARE FIXED, CONNECTED IN THEIR UPPER PART ELECTRICALLY AND MECHANICALLY TO A PLATE 7. THE SOCKETS ARE EQUIPPED WITH WATER COOLING CHANNELS, ARRANGED IN AREAS IN FRONT WHICH THERE ARE LONGITUDINAL CHANNELS, ON THE CONTACT SURFACES. THE ADVANTAGES OF THE CONTACT HEAD ACCORDING TO THE INVENTION CONSIST IN SIMPLIFIED CONSTRUCTION, REDUCED WEIGHT, INCREASED RESISTANCE IN OPERATION, AS WELL AS THE POSSIBILITY OF EASY EXCHANGE OF THE SINGLE DAMAGED SOCKET.

Description

The present invention relates to a contact head for the holders

  electric arc furnace electrodes, which applies in particular to the field

  metallurgy and mechanical engineering.

  There is known a contact head for electrode holders of electric arc furnaces, constituted by a body to which are fixed by means of bolts

  two sockets in the center of which cooling channels are arranged

  The body is connected by tubular supply bars.

  electrical current and the power supply to the sockets

  kills all their surface contact with the body.

  The disadvantage of the known contact head lies in the fact that the contact surfaces between the body and the sockets are subjected to a

  pollution and there is therefore a welding sockets to the body.

  In the case of welding one of the sockets, it is necessary to replace the entire contact head This represents a complicated and slow operation Other disadvantages are the complex construction and the large mass.

  The object of the invention is to provide a contact head for carrying

  electro-electric arc electrodes having simplified construction, increased strength, light weight and ease of replacement This object is achieved by a contact head for electric arc furnace electrode, comprising a body on which are connected sockets in their upper part electrically and mechanically to

  a plate in the form of a flange The sockets are provided with

  water cooling, located in areas in front of which there are

  longitudinal channels on the contact surfaces.

  In a preferred variant of the invention, the sockets are isolated

electrically from the body.

  The advantages of the contact head according to the invention are a simplified construction, a reduced weight, an increased resistance during the operation, as well as the possibility of easy replacement and this

only the damaged socket.

  An embodiment of the contact head according to the invention is hereinafter described by way of example, with reference to the appended drawings in which FIG. 1 represents a contact socket seen from the front. FIG. 2 represents a partial cross-section. the contact socket of Figure 1;

  FIG. 3 represents a longitudinal section of the head of con-

  tact with compression jaw; and FIG. 4 shows a cross-section of the compression jaw contact head of FIG. 3, made in the upper part of FIG.

the sockets.

  According to Figures 1 and 2, the sleeve 1 is made of copper with two water cooling channels 2, arranged behind the zones of the longitudinal channels 3, on the contact surfaces 4 In the upper part

  of the socket 1 are pierced with openings 5 for fastening with

  lons a plate-shaped flange 7, and openings 6 for the

  connection with the cooling system of Figure 3.

  According to FIGS. 3 and 4, the flange plate 7 is connected to the copper current conducting tubular bars 8 by means of the part 9 and the bolts 10.

  electrical and mechanical connection to the flange plate 7 by means of

  11 The sockets 1 are leaned, at the heel 12 of the body 13, manufactured in

  stainless steel and they are isolated from him by an asbestos board 14.

  The cooling water is supplied by means of the tubes 15.

  sockets 1 to the electrode 16 is effected by means of the jaw of

pressure 17.

  During the operation of the electric arc furnace, the current transmission from the sockets 1 to the graphite electrode 16 is

  made by the contact surfaces 4 The arrangement of the

  water cooling 2 in areas not in contact with electricity.

  graphite trode 16 prevents the channels of the sockets 1 from being pierced during the periodic appearance of the electric arcs on the contact surface socket-electrode In the case where one of the sockets 1 is ablmée or eroded, the construction allows to only change the damaged socket without the need to replace the entire contact head as is the case in

the known construction.

  The sockets 1 have a mass several times smaller than the mass of the entire contact head, which saves non-ferrous metals. The body 13 of the contact head is not changed because

  in this case it has only a carrier function, does not participate in the trans-

  mission of the current and in addition it is made of non-oxidizable steel.

3.

Claims (2)

  1 Contact head for electrode holders for electric arc furnaces comprising a body and channel sleeves for water cooling, characterized in that the bushes (1) are fixed to the body (13) and are attached in their upper part so as to electrical and mechanical   flange plate (7), while the cooling channels   water supply (2) are arranged in areas in which there are   longitudinal channels (4) on the contact surfaces (4).   Contact head according to Claim 1, characterized in that   the sockets (1) are electrically insulated from the body (13).