RU226996U1 - DEVICE FOR FASTENING THE ANODE HOLDER ROD OF AN ALUMINUM ELECTROLYSER WITH BALINED ANODES - Google Patents

Abstract

The utility model relates to the field of non-ferrous metallurgy, in particular to the electrolytic production of aluminum in cryolite-alumina melts, namely to the structural elements of electrolyzers with baked anodes. The device contains a clamp of the anode holder rod and a clamping device, wherein the clamp is equipped with four levers, hingedly connected to each other by an axle and nuts, while the ends of the axle, resting on the bracket hook, are hingedly connected to protective bushings, which are fixed on the axle by external locking rings, and each the nut is made with a hole with an internal thread pitch opposite to each other, intended for insertion of a tightening fastener element into it, containing two threaded zones with thread pitches opposite to each other, while said tightening fastener element has a square head, and the clamping device consists of two clamping plates connected to the levers through grooves and rigidly mounted on two lever-limiters, which in turn are hingedly connected to the axis, and the square head is tightly connected to the tightening fastener by means of a square slot and is configured to impart rotational movement to the tightening fastener by means of a remote manipulator. The technical result is to ensure voltage stability between the anode holder rod and the anode frame and increase the reliability of pressing the anode holder rod to the anode frame. 2 salary f-ly, 5 ill.

Description

Field of technology

The utility model relates to the field of non-ferrous metallurgy, in particular to the electrolytic production of aluminum in cryolite-alumina melts, namely to the structural elements of electrolyzers with baked anodes.

State of the art

When producing aluminum in electrolyzers with baked anodes, the current supply is carried out by mechanically pressing the anode holder, which is an aluminum rod, to the busbar using special screw clamps. During electrolysis, anode holders with carbon anode blocks are lowered or replaced to compensate for the wear of the anodes during their combustion to maintain a constant distance between the anode and the cathode of the electrolyser. The clamps are controlled (opening and closing) by special manipulator devices provided on the complex crane, providing simultaneous maintenance of both the clamp and the anode holder. Thus, the clamping force of the screw clamp must ensure that the anode holder is tightly pressed against the anode frame, capable of supporting the weight of the anode, and also ensure optimal electrical contact without a voltage drop across them, which is the main criterion for the efficiency of the clamps.

The device is known according to patent RU 2398053, publ. 08/27/2010. It contains two hooks mounted on the anode frame, between which the anode rod must be placed, a clamp containing a housing, including two levers having at least one supporting surface, two coaxial side rods intended for laying on the hook and a drive in the form of a lag screw, capable of causing the levers to rotate around the axis of the rods between the tightened position and the released position. The geometry and construction material of at least one hook, one lever and/or one side rod provide sufficient elastic deformation of the device relative to the anode frame during tightening of the screw. The disadvantage of such a device is the relatively small contact surface between the clamp and the anode holder rod, due to its manufacture in the form of legs curved along the radius.

The device is known according to patent RU 2724774, publ. 06/25/2020, containing two levers in the form of brackets or clamps, hingedly connected on a common rod extending inside the hooks mounted on the anode frame, while the levers are actuated by means of a tightening screw with two zones of opposite pitch, the pressure surface of the connector formed by two pressing elements rigidly connecting said brackets or clamps to each other, and located on both sides of the pivot joint of the levers or clamps, wherein the pressing surface of each of the two pressing elements interacts with a hinge installed at the end of the front crossbars connecting the two brackets or clamps, forming a connector made in the form of two U-shaped brackets, with the free ends of the brackets connected to each other by a plate, and the base of the U-shaped bracket is connected to the corresponding pressure surface. The disadvantage of the device is the relatively small contact surface between the clamp and the anode holder rod, limited by the shape of the front cross member.

The device is known according to patent RU 2439208, publ. 12/20/2008, consisting of two brackets or jaws acting as levers, which are attached with hinges on a common axis, the corresponding extensions of the axis are accepted by the hooks of the anode frame, working in conjunction with the clamp, and are actuated using a clamping screw with two zones and a thread pitch of in opposite directions, working together at the level of the traverses, bringing the free ends of the brackets together. The clamping surface of the connector, that is, the area intended to work with the anode holder rod to connect the latter to the anode frame, is formed by a clamping device, separate from the brackets or traverses, combining them with each other, while the clamping device is self-aligning on the clamp. The disadvantage of the device is the relatively small contact surface between the clamp and the anode holder rod, limited by the shape of the traverse.

In this case, a common drawback for the listed devices leads to an increase in the unevenness of pressing the anode holder rod to the anode frame, causing a voltage drop between them, as well as a fall of the anode holder rod due to insufficient pressing area.

Implementation of a utility model

The purpose of the utility model is to increase the contact surface of the clamping device with the anode holder rod.

The technical result from the use of the claimed utility model is to ensure stability of the voltage between the anode holder rod and the anode frame and increase the reliability of pressing the anode holder rod to the anode frame.

The technical result is achieved by the fact that in the device for fastening the anode holder rod 1 on the anode frame 2 of an aluminum electrolyser, containing a clamp 4 of the anode holder rod 1 and a clamping device 20, while the clamp 4 is equipped with four levers 5, 6, 7, 8, pivotally connected to each other axle 11 and nuts 12, 13, while the ends of the axle 11, resting on the hook of the bracket 3, are pivotally connected to protective bushings 14, which are fixed on the axle 11 by external locking rings 15, and each nut 12, 13 is made with a hole, with an internal a thread pitch opposite to each other, intended for insertion of a tightening fastener 16 into it, containing two threaded zones with thread pitches 17, 18 opposite to each other, while the said tightening fastener 16 has a square head 19, what is new is that the clamping device 20 consists of two pressure plates 21, 22, connected to levers 5, 6, 7, 8 through grooves 26 and rigidly mounted on two limiting levers 23, 24, which in turn are hingedly connected to the axis 11, and the square head 19 is connected to tension with the tightening fastener 16 by means of a square slot, and is configured to impart rotational movement to the tightening fastener 16 by means of a remote manipulator.

It helps to achieve the technical result that the levers 5, 6, 7, 8 are made rigidly connected in pairs to each other by jumpers 9, 10, and the clamping device 20 contains stiffeners 25, fixed between the limiting levers 23, 24.

Brief description of drawings

The utility model is illustrated by drawings.

In fig. Figure 1 shows a schematic illustration of an electrolyzer in isometric view, front view.

In fig. 2 and 3 show a schematic isometric representation of the device, front view, right view.

In fig. 4 and 5 show a vertical section of the device in the open and closed positions, respectively, where:

1 - anode holder rod;

2 - anode frame;

3 - bracket;

4 - clamp of the anode holder rod;

5, 6, 7, 8 - clamp lever;

9, 10 - jumper;

11 - axis;

12, 13 - nut;

14 - protective sleeve;

15 - retaining ring;

16 - tightening fastening element;

17, 18 - threaded zone;

19 - head of the tightening fastener;

20 - clamping device;

21, 22 - pressure plate;

23, 24 - limit lever;

25 - stiffener;

26 - lever groove.

The claimed utility model for a device for fastening an anode holder rod contains an anode holder rod clamp (4), consisting of four levers (5, 6, 7, 8), rigidly connected in pairs by jumpers (9, 10) and pivotally connected to an axis (11) . The nuts (12, 13) are pivotally connected to the levers (5, 6, 7, 8). The ends of the axle (11), resting on the bracket hook (3), are pivotally connected to protective bushings (14), which are fixed on the axle (11) by external locking rings (15). Each nut (12, 13) has a hole with an internal thread pitch opposite to each other, designed for insertion of a tightening fastening element (16), containing two threaded zones with thread pitches opposite to each other (17, 18), while the tightening fastener the element contains a square head (19) pressurized to it by means of a square slot, through which the tightening fastening element (16) is given a rotational movement by a manipulator device installed on the complex crane. The clamp (4) has a clamping device (20), consisting of two clamping plates (21, 22), rigidly mounted on two limiting levers (23, 24) and a stiffener rib (25), which in turn are hingedly connected to the axis ( eleven). In this case, the pressure plates (21, 22) are connected to the levers (5, 6, 7, 8) through grooves (26).

Description of the device operation

The anode holder rod (1) is pressed to the anode frame (2) as follows: the anode holder rod (1) is placed between two brackets (3) installed on the anode frame (2) using a bolted connection, then a clamp ( 4), placing its axle (11) with protective bushings (14) on the hooks of the brackets (3), while the clamp (4) is in the open position. In this position, the pressure plates (21, 22) of the clamping device (20) exert no or very little force on the anode holder rod (1) (Fig. 4). Then, using a manipulator mounted on a complex crane, the tightening fastening element (16) is given a rotational movement to rotate the levers (5, 6, 7, 8), which, being engaged in the grooves (26) with the pressure plates ( 21, 22), press on them perpendicularly in the direction of the anode frame, bringing the clamp (4) to the closed position. In this position, the pressure plates (21, 22) of the clamping device (20) are in contact with the anode holder rod (1), thereby holding and pressing the anode holder rod (1) to the anode frame (2) (Fig. 5).

Claims (3)

1. A device for fastening the anode holder rod 1 on the anode frame 2 of an aluminum electrolyser, containing a clamp 4 of the anode holder rod 1 and a clamping device 20, while the clamp 4 is equipped with four levers 5, 6, 7, 8, hingedly connected to each other by an axis 11 and nuts 12 , 13, while the ends of the axis 11, resting on the hook of the bracket 3, are pivotally connected to the protective bushings 14, which are fixed on the axis 11 by external locking rings 15, and each nut 12, 13 is made with a hole with an internal thread pitch opposite to each other, designed for insertion into it of a tightening fastener 16 containing two threaded zones with thread pitches 17, 18 opposite to each other, while said tightening fastener 16 has a square head 19, characterized in that the clamping device 20 consists of two clamping plates 21, 22, connected to levers 5, 6, 7, 8 through grooves 26 and rigidly mounted on two limiting levers 23, 24, which in turn are pivotally connected to the axis 11, and the square head 19 is tightly connected to the tightening fastener 16 by means of a square slot and is configured to impart rotational movement to the tightening fastening element 16 by means of a remote manipulator. 2. The device according to claim 1, characterized in that the levers 5, 6, 7, 8 are made rigidly connected in pairs by jumpers 9, 10. 3. The device according to claim 1, characterized in that the clamping device 20 contains stiffening ribs 25 secured between the limiting levers 23, 24.