RU2324011C2 - Device for hoisting and lowering of baked anode blocks on electrolytic sections with fixed anode frame - Google Patents

Abstract

FIELD: metallurgy; equipment for maintenance of baked anodes on electrolytic sections in aluminum production.

SUBSTANCE: device for hoisting and lowering of baked anode blocks on electrolytic sections with fixed anode frame consists of two parallel shafts with attached sprockets that drive endless traction chains; supports of the chain links carry conductive bars of baked anode blocks; meanwhile sprockets, carrying traction chains, are not dead fixed and are able to rotate freely on the shaft; the said sprockets are equipped with enmeshment devices; these devices with pulleys, arranged on a shaft, are either in the form of straight and beveled teeth set along the perimeter of a side surface and jointed with sprockets of disks and pulleys, or in kind of sunk spring loaded components, located in the slots along the external side of the rim, which is secured on the pulley shaft,- arms, balls and rods which, upon meshing, enter into the slots on the inside surface of the disk rim, connected with the sprocket, thus providing a reliable meshing due to constant constriction of the spring and partial overlap of the slot.

EFFECT: possibility to implement less powerful drive in anode block hoist mechanism; increase of operating reliability of the mechanism on a whole.

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Description

The invention relates to technological equipment for producing aluminum by electrolysis.

The known mechanism for raising and lowering the calcined anode blocks on electrolyzers with a fixed anode frame, containing two parallel shafts located symmetrically with respect to the longitudinal axis, equipped with sprockets mounted on the shaft, bearing endless traction chains, on the links of which are connected the current-carrying rods of the calcined anode blocks using a bracket, based on the grooves of the chain links or with the help of spring-loaded levers engaged with the chain, which structurally does not allow the use of an asterisk Ki with a small diameter, reduce the torque on the drive shaft and its diameter.

To solve this problem, a mechanism for raising and lowering the calcined anode blocks is proposed, containing two parallel shafts / 3 / and sprockets / 1 /, bearing endless traction chains / 11 /, which are not fixed, are made to rotate freely on the shaft and are equipped with gearing mechanisms with pulleys / 4 / fixed to the shaft in the form of teeth with a straight and beveled face located along the perimeter of the side surface of the disks / 2 / and pulleys connected to the sprockets, or in the form of recessed spring-loaded elements located in grooves along the bunks the outer part of the pulley rim, - levers / 5 /, balls / 6 /, rods, which, when engaged, engage in the recesses on the inner surface of the disk rim connected to the sprocket.

Reliability of engagement of recessed elements is ensured by constant preloading by their spring / 7 / and partial overlapping of the groove, which excludes spontaneous disconnection.

Reliability of teeth engagement is ensured by their support on straight faces and spring preload.

Brackets / 8 / with current-carrying flexible busbar / 9 / for attaching current-conducting rods / 10 / anode blocks are constantly connected to the traction chain / 11 / using plates / 12 / or in another way.

The proposed solution allows the use of a chain with a smaller pitch, sprockets with a significantly smaller diameter, several times reduce the torque on the drive shaft and reduce its diameter.

The location of the engagement elements at a much greater distance (radius) from the shaft axis than the chain sprocket, significantly reduces the load on their nodes.

This solution greatly simplifies the design of the drive, increases the operational reliability of the main node of the anode device.

Figure 1, 3 shows a fragment of a longitudinal view of the electrolyzer (ed. Certificate. No. 377418) with the proposed solutions.

Figure 2 (section aa) is a view of the sprocket disk from the side of the lateral teeth.

In Fig.4, 5 (sections BB, BB) is a view of the pulley and sprocket disk with gear elements of the type "lever".

In Fig.6, 7 (sections G-D, D-D) is a view of a pulley and a disk of an asterisk with gear elements of the ball type.

As the burned anode blocks burn, the shafts rotate together with the pulleys and sprockets meshing with them, lowering the branches of the chains with brackets fixed to them, to which the current-carrying rods of the burned anode blocks are attached.

The burnt anode block (cinder), without disconnecting the power supply rod from the bracket, is lifted by the lifting device to the upper (initial) position.

In this case, the sprockets rotate in the opposite direction, in one case they are shifted along the shaft due to the sliding of the beveled faces of the teeth of the disk, compress the spring and disengage from the pulleys; in the other case, the engagement elements are recessed into the grooves of the outer rim of the pulley by the beveled surface of the recess of the disk, freely rotated without displacement along the axis of the shaft.

After raising the bracket to its original position, the springs return the sprockets or recessed elements to the permanent engagement position.

The supply rods are disconnected from the bracket, and a new anode block is installed in place of the extracted cinder.

Claims (1)

The mechanism for raising and lowering the calcined anode blocks on electrolyzers with a fixed anode frame, comprising two parallel shafts with sprockets mounted on the shaft, bearing endless traction chains, on the links of which the current-carrying rods of the burnt anode blocks are suspended using the brackets, characterized in that the sprockets carry traction chains made with the possibility of free rotation on the shaft and equipped with gearing mechanisms with pulleys fixed to the shaft in the form of teeth with straight and beveled faces located along the perimeter of the side surface of the disks and pulleys connected to the sprockets, or in the form of recessed spring-loaded elements located in the grooves on the outer part of the rim mounted on the pulley shaft, in the form of levers, balls, rods that, when engaged, recesses on the inner surface connected to the sprocket the rim of the disk to ensure reliable engagement due to the constant preload of the spring and partial overlap of the groove.

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