SU1747836A1 - Conveyer heating furnace - Google Patents

Abstract

The furnace has U-shaped drawouts with horizontal reciprocating movement, in the U-shaped cavities of which there are additional rods with pushing lugs and with a drive for vertical movement of the rods. The additional rods are protected from heat by examining and tingling with the walls of the draw-out beams, as well as the housing and hydraulic lock inside the draw-out beams. The pushing protrusions of the rods extend through the windows in the draw-out beams and move the blanks. 3 sludge.

Description

The invention relates to furnaces with mechanical straight-line movement of long products and can be used in the metallurgical and engineering industries. . -, A device for moving workpieces in a heating furnace is known, which contains a driving carriage with a working body, which is made in the form of a driving wheel with a corrugated rim and is equipped with a moving mechanism having pivotally connected levers. , ;;,

A disadvantage of the known device is the vulnerability of the mechanism for moving the workpieces from thermal radiation from the heating zone and from scaling into the hinge assembly, which significantly reduces the reliability of the device.

Also known is a pass-through thermal furnace, which contains a heating chamber, supports with fixed rods fixed to them and holders and guides on which

additional rods made with the possibility of rotation and horizontal movement.

  In the known furnace, the guides are made in the form of rollers with mutually perpendicular axes, and the supports are placed in the heating chamber and have slots for installing the rollers.

The main disadvantage of the furnace is the low resistance of the support units placed in the heating chamber, which are subject to high temperature and scale from the processed products. In addition, the furnace has limited use, since it is used to heat only round products.

The purpose of the invention is to improve the reliability of the furnace;

FIG. 1 shows the proposed pass-through heating furnace, longitudinal section; in fig. 2 - the same, cross section; in fig. 3 - roll out beam, cross section;

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The furnace contains a heating chamber with a lined casing 1, in a stationary bottom 2 of which support angles 3 of heat-resistant steel for workpieces 4 are mounted. The roll-out beams 1 are U-shaped and are connected with a drive of their reciprocating-and-forward movement along rail tracks 9 under the furnace bottom by means of the grids 8, Windows 10 are drawn into the withdrawable beams 7, into which pushes 11 x rods 12 located in the cavity of the withdrawable beams 7; The walls of the beams 7 are connected below by stiffening plates 13, on which are mounted the supports of the hinge assemblies 14 of the crank-connecting rod mechanism. Additional rods 12 are placed on hinge joints. Rods 12 are installed with the possibility of reciprocating vertical movement by means of a crank mechanism to a height that provides pushing protrusions 11 above the roll-out beams 7. Shocks 15 for additional rods 12, preventing the destruction of the windows 10 in the draw-out beams by the protrusions 11 during their operation. On the draw-out beams is placed the drive 16 of the crank-connecting rod mechanism, the cranks 17 of which are balanced 18, and the connecting rods 19 are connected to the rods 12. Such a structure prevents the destruction of the bearing assemblies of the crank mechanism during operation. roll-out beams 7

Knife-cutters 22 are fixed on the sides of the casing 20, and along the longitudinal axis there are mounting holes for the pushing protrusions 11. The furnace also contains a loading table 24, a loading 25 and a discharge 26 window,

The machine operates as follows. The blank 4 is placed on the loading table 24 and draw-out beams 7 are brought under it. The drive mechanism 16 of the crank-connecting rod mechanism is activated, which raise the additional rods 12 to the working position, the protrusions 11 coming out of the 10 draw-out windows beams, and the workpiece 4 is located between the pushing protrusions. When the upper working position is reached, the protrusions 11 turn off the drive 16 and the withdrawable beams 7 shift along

the rails 9 in the direction of loading the blanks into the furnace by a step equal to the distance between the protrusions 11 Together with the withdrawable beams 7 the rods 12 move, and their protrusions 11 push the workpiece 4 by one step, while the shock absorbers 15 balance the force of resistance of the workpieces to movement and prevent contact of the protrusions 11 and the walls of the windows 10 in the draw-out beams, preventing their destruction. Thereafter, the rods 12 are lowered by means of a crank mechanism, the withdrawable beams 7 are returned to their original position, and then the cycle is repeated.

The rate of advance of the blanks through the furnace depends on the mode and duration of heating. The furnace can operate in automatic mode or be controlled by the operator from the control panel.

The implementation of the furnace with U-shaped draw-out beams, in which additional rods with a crank shaft mechanism, protected from thermal radiation and scale, and an internal hydraulic lock, are installed, increase the service life of the bearing and hinge assemblies of the crank shaft mechanism, as a result which increases the reliability of the furnace Reliable protection of mechanical components from heat radiation and scale ensure the efficiency of the furnace during the entire period between scheduled repairs.

Moreover, such an implementation of the furnace provides access to the nodes of the crank mechanism for lubrication and fine-tuning

Claims (1)

Invention Formula A pass-through heating furnace, containing a heating chamber, drawout driven beams installed in the furnace bottom openings and rods mounted for reciprocating movement, characterized in that, in order to improve the reliability of the furnace, it is equipped with shock absorbers installed at the ends of the drawout beams, crankshaft hinge knots with hydraulic locks, made in the form of grooves, placed on the internal planes of the withdrawable beams and the protective casing with shut-off knives, for additional push rods are made on the individual rods, roll-out beams are made with vertical windows, and push-over ledges are placed in these windows, with roll-out beams 24  7 2pWfW f2 WWf    /, Phi / 0 0 eleven J 0 Aa one /////// 72 rig 2 18 tf 14 in