TW201506144A - Apparatus for opening and closing coke-oven doors - Google Patents

Abstract

The invention relates to an apparatus for opening and closing coke oven doors (2). The apparatus comprises an actuating arrangement (4) which is connected to a drive (10). The actuating arrangement (4) is arranged on a carriage (3) above the coke oven doors (2) and comprises at least one rod like element (5) for raising and lowering a coke oven door (2) and also comprises a mechanism (8) for pivoting the rod like element (5) about a horizontal axis.

Description

Device for opening and closing the coke oven door

The present invention relates to a device for opening and closing a coke oven door having an actuating arrangement member coupled to a drive. In particular, the device is intended for use in "heat recovery" coking plants that use coking products for combustion and are therefore used for industrial heat.

In the coking plant, coke is discharged from the furnace chamber by a discharge machine arranged on one of the machine sides of the coke oven group. The actual discharge operation takes place by means of an ejection machine. For this purpose, the door of the coke oven is opened on the machine side. The opposite side of the furnace also has a door that is open for the discharge operation and through which the coke is discharged outside the furnace.

These doors open only during this discharge operation and any cleaning operations that may be required. After completing these operations, the doors are closed again so that the heat loss of the coke oven group is kept as low as possible. For this reason, a reliable door moving mechanism must be available for the discharge operation and the work associated therewith.

In a "heat recovery" (HR) coking plant, the furnace door is typically lifted and reinserted by the furnace operating machine for the purpose of filling and emptying the furnace chamber. For production and time related reasons, it may be necessary for the above purposes to raise and lower the furnace door again by means of a stationary facility rather than by operating the machine.

DE 27 20 469 A1 describes a lifting device for a furnace chamber door of a horizontal coke oven. The lifting device can be moved horizontally toward and away from the oven door. The device has a plurality of lifting jaws on the oven door for engaging in the support block. The direction of movement of the door is recorded by a counter. This should make it possible for the coke oven door to be taken out of the opening and accurately reinserted after the washing operation. These doors are mounted on a carriage that houses the door device and that allows the entire door device to move away from the furnace opening by using rollers and rails and move again in the direction toward the furnace opening.

DE 10 2007 057 412 B3 describes a device for opening and closing a horizontal coke oven. The furnace door is connected to a cable or a chain. A plurality of deflection rollers are present above the individual furnace doors and the pulling force is determined in the horizontal direction. A gripper carriage can be moved parallel to the coke oven stack. The cable can be tensioned or relieved by the horizontal travel of the gripper carriage.

Steel cables and steel chains are subjected to considerable loads by the pulling force necessary to move the furnace door along the track and are subject to constant wear. In addition, the cable and chain expansion that occurs during operation requires considerable additional expense in terms of technical equipment, as well as the cost of controlling the furnace door actuation facility to ensure elevated furnace door locations. Due to the use of steel cables, it is also necessary to equip the door actuation facility with high expenditure safety equipment for the protection of the operation and maintenance personnel in the event of a cable break. In the event of a cable or chain rupture, the raised furnace door falls back to its basic position in an uncontrolled manner, and the resulting impact energy may cause considerable damage to the coke oven.

It is an object of the present invention to provide a device for opening and closing a coke oven door that is subjected to low levels of wear and ensures a high level of safety. The device should have the feature that it has a long service life and is highly reliable. The maintenance of the device should be as simple as possible here and should allow the individual coke ovens to be activated separately. The device should not be adversely affected by dirt and dust. The device should require as little space as possible and should be able to be installed with a low level of expenditure. It should also be possible to precisely move the doors into the desired position in each case by means of the device.

This object is achieved according to the invention in that the actuating arrangement is arranged on a carriage above the coke oven door and has at least one rod-like element for raising and lowering a coke oven door, There is also a mechanism for pivoting the rod member about a horizontal axis. This carriage is also referred to below as a door lift carriage.

Preferably, a door lift carriage is arranged on each side of a group of furnaces comprising a plurality of furnace chambers, i.e. on both the machine side and the coke side, above the furnace doors. The door lift carriage is displaceable in the longitudinal direction of the set of furnaces and supports an actuating arrangement having at least one rod element for raising and lowering a coke oven door in accordance with the present invention And a mechanism for pivoting the rod member about a horizontal axis. The pivoting mechanism allows the rod-like element to pivot at the front of the coke oven door after the lowering operation. The use of a vertically adjustable, pivotable rod-like member that raises and lowers the coke oven door in accordance with the present invention provides a means that can be adversely affected by dust and dirt. It is also possible to precisely move the coke oven door into the desired position in each case by means of the device.

For the purpose of opening the coke oven door, in the first example, the carriage travels into position above the coke oven door. The rod-like element extends outwardly and pivots in the direction of the coke oven door, wherein a connection is established between the rod-like element and the coke oven door. Thereafter, the coke oven door is raised by a displaced rod-like member, wherein the rod-like member pivots away from the coke oven during the raising operation. After the discharge operation and/or the cleaning operation, the coke oven door is again lowered by the displaced rod-like member in combination with a pivoting member, the connection between the rod-shaped member and the coke oven door is released, and the rod element is released The piece is moved back to its parking position.

The rod members are preferably mechanical rods. The tie rods can be displaced vertically by means of an actuator and can therefore raise and lower the coke oven door.

A track for the carriage is preferably arranged on a plurality of anchoring columns of the coke oven, wherein a plurality of rails for the corresponding door lift carriage are laid on both the machine side and the coke side on. The oven door lift carriage travels on the track and the track is mounted to the anchoring posts in a suitable manner.

The actuating arrangement member has a connecting member for gripping a counterpart disposed on the coke oven door. For this purpose, it is preferred to arrange a hook at the lower end of the tie rods and to engage the corresponding bolts of the furnace door. As an alternative to this, it is also possible to arrange a hook in the form of a counterpart on the oven door and to equip the rod with a corresponding bolt engaged in the hook.

The rod-like elements may be formed from a solid material or may have a hollow cylindrical design. It is possible to use a tie rod having a constant length or a telescopic rod made of two or more interengaging elements.

Both hydraulic drive systems and electromechanical drive systems are suitable for vertical actuators and pivot drives. Vertical actuators for the drawbars can act directly on the bars, for example in the form of hydraulic cylinders. However, it is also possible to cause the vertical vertical actuator actuator to act indirectly, such as in the case of gears and meshing arrays, where a rotary drive produces vertical movement of the pull rods.

The oven door lift carriage can be made to run longitudinally over the set of furnaces by a travel drive mounted on the carriage or by a stationary travel drive. A cable pull system with a cable winch is recommended for the stationary travel drive. The only need is for the travel drive to generate the force needed to move the door lift carriage.

The required power can be passed through multiple stationary conductive rails and/or by being mounted on the slip A cable tray on the rack is supplied to the oven door lift carriage.

1‧‧‧ furnace room

2‧‧‧Coke oven door

3‧‧‧Carriage

4‧‧‧Activity arrangements

5‧‧‧ rod-shaped components

6‧‧‧Connecting components

7‧‧‧Parts

8‧‧‧ institutions

9‧‧‧ Carrier parts

10‧‧‧Actuator

11‧‧‧ Track

12‧‧‧ anchored column

13‧‧‧ Cable tray

14‧‧‧ pivot lever

Further features and advantages of the present invention can be obtained from the description of an exemplary embodiment with reference to the accompanying drawings and the accompanying drawings. In the drawings: Figure 1 shows a side cross-sectional view of a device for opening and closing a coke oven door.

Figure 2 shows the device shown in Figure 1 in a non-activated parking position.

Figure 3 shows a front view of the device.

Figure 1 shows a furnace chamber 1 of a horizontal coke oven. The furnace chamber 1 is closed by a coke oven door 2. Figure 1 shows the coke oven door 2 in the closed position (lower left) and in the raised open position (upper right).

A carriage 3 with an actuating arrangement 4 is shown on a track above the coke oven door. In the exemplary embodiment, as can be seen from Fig. 3, the actuating arrangement 4 comprises two rod-like elements 5, which are arranged side by side with each other. In the exemplary embodiment, the rod elements 5 are tie rods.

According to the illustration in Fig. 1, each of the rod-like elements 5 is each provided with a connecting element 6 at its lower end. The connecting element 6 engages in the counterpart 7 on the coke oven door 2. In the exemplary embodiment, the connecting element 6 is a hook that engages on the coke oven door 2 in a corresponding bolt forming the counterpart 7.

The actuating arrangement 4 comprises a mechanism 8 for pivoting the rod-like elements 5. In the exemplary embodiment, the mechanism 8 includes a hydraulic cylinder. These two rod-like elements 5 are arranged on a carrier part 9. The carrier member 9 is pivotable about a horizontal axis. This mechanism 8 pivots the carrier part 9 and thus pivots the rod-like elements 5.

The carriage 3 is arranged on a track 11 which is supported by a plurality of anchoring columns 12 of the coke oven.

Figure 3 shows a front view of the device according to the invention. The carriage 3 has been moved by a travel drive to a position above the coke oven door 2. A cable tray 13 for supplying power to the traveling drive and the actuator acting on the rod-like members is arranged on the carriage 3.

Once the carriage 3 has been displaced into position above the coke oven door 2, the rod elements 5 are displaced downwardly away from their raised parking position by means of the vertical actuator 10. And entering the operating position (this is shown in Figure 1), and the rod-like elements 5 are pivoted by means of the mechanism 8 at the front of the counterpart 7 of the coke oven door 2. Corresponding to the joint element 6 on the coke oven door Pairing piece 7. In the exemplary embodiment, the connecting element 6 is configured in the form of a hook that engages in the coke oven door 2 in a tension bolt forming the counterpart 7. A limit switch mounted in the hook controls the pull bolt to properly abut the tension bolt of the coke oven door 2 and disconnects the pivoting mechanism 8.

Thereafter, the rod-like elements 5 are displaced upward by the vertical actuators 10, and the coke oven doors 2 are carried with them by these tensioning bolts. After the vertical actuator 10 has been switched on, the pivoting mechanism 8 can be activated immediately. This allows the rod elements 5 to be pivoted during the raising operation. A distance measuring system arranged on the actuator 10 allows the correct height position of the raised coke oven door 2 to be determined.

Once the oven chamber has been filled, the vertical actuator 10 causes the coke oven door 2 to be lowered again to enter the starting position. The hook is released from the tension bolt. The mechanism 8 is switched on and the rod elements 5 are pivoted away from the coke oven door 2 again. The rod elements 5 are finally displaced again by the vertical actuator 10 into their raised position.

According to the illustration in Fig. 1, the coke oven door 2 is suitably connected to the furnace chamber 1 of the coke oven furnace by a lever arrangement made up of a plurality of parallel pivot levers 14 on. The lever arrangement causes the coke oven door 2 to be guided in parallel and assists the coke oven door 2 to be correctly inserted into the opening of the furnace chamber 1 during the closing movement.

1‧‧‧ furnace room

2‧‧‧Coke oven door

3‧‧‧Carriage

4‧‧‧Activity arrangements

5‧‧‧ rod-shaped components

7‧‧‧Parts

8‧‧‧ institutions

9‧‧‧ Carrier parts

11‧‧‧ Track

14‧‧‧ pivot lever

Claims (5)

A device for opening and closing a coke oven door (2) having an actuating arrangement (4) coupled to a drive (10), characterized in that the actuating arrangement (4) is arranged a carriage (3) above the coke oven door (2) and having at least one rod-like element (5) for raising and lowering the coke oven door (2) and also having means for the rod-like element ( 5) A mechanism (8) that pivots about a horizontal axis. A device as claimed in claim 1, wherein a track (11) for the carriage (3) is arranged on a plurality of anchoring columns (12) of the coke oven. The device of claim 1 or 2, wherein the actuating arrangement (4) has a connecting element (6) for gripping a counterpart (7) arranged on the coke oven door (2). A device according to any one of claims 1 to 3, wherein the actuating arrangement (4) has a hydraulic system or an electromechanical system for displacing the rod-like element (5). The device of any of claims 1 to 3, wherein the actuation arrangement (4) has a plurality of gears and meshing arrays for displacing the rod-like element (5).