JPS60211011A - Walking beam conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The purpose of the present invention is to transfer a steel slab (a piece of metal intermediate between an ingot and a plate and whose width is more than twice its thickness) to the upstream side of a hot transfer device. It is on a fluid pad walking beam conveyor for feeding in a reheat blast furnace.

Margin below [Prior Art] Among the various slab feeding mechanisms in reheat blast furnaces, slab feeding mechanisms based on hydraulic pushers have existed for a long time, and for this reason slab reheat blast furnaces are one-button blast furnaces.'' It was called.

The main drawback of this arrangement was that there was a risk that the slabs would overlap during their progress towards the blast furnace distribution opening. This drawback was successively eliminated by so-called walking beam conveyors, in which several walking beams move alternately in the longitudinal direction of the area of the floor of the blast furnace, and in which there are essentially four walking beams. A longitudinal movement along one closed track over two consecutive steps is given.

At the beginning of each stage, the slab rests across it on the floor, while the walking beam is at a lower height and is therefore relieved of the weight of the slab.

During the first phase of the slab traverse cycle, these walking beams move vertically upwards to lift the slab off the floor, releasing the slab weight on the floor and instead imposing this slab weight on the walking beams.

During the second stage of the slab traverse cycle, the walking beam loaded with the slab weight is moved by a predetermined amount, which constitutes the speed (gait) of the walking beam conveyor.
It runs substantially horizontally and longitudinally towards the blast furnace distribution opening.

During the third conveying stage, the walking beam is lowered below floor level and releases the slab, which occupies a longitudinal distance equal to the pace of the expanding walking beam conveyor.

During the fourth stage of the conveying cycle, the walking beam runs longitudinally towards the blast furnace inlet and thus towards the rear and remains below the level of the floor, on which the slab rests.

At the end of the fourth stage of the conveying cycle, the position of the slab has therefore advanced by an amount equal to the pace of the walking beam conveyor, while the walking beam is in the starting position it was at the beginning of the first stage of the conveying cycle; A new cycle can therefore be started.

In known mechanisms of this type, the walking beam has to be driven by very powerful and cumbersome mechanical movement devices, and the required power of the drive means is only very high.

In fact, due to the heavy weight of the slabs to be processed the walking beam has to be correspondingly strong and
Also, the drive means for providing the above-mentioned longitudinal tubes to the beams requires high power tubes.

[Problems to be solved by the invention]

The object of the invention is to simplify the means for transporting slabs in reheat blast furnaces, which still use a walking beam mechanism, but without controlling the movement of said beams by means of restraints or complex movement devices, such as hydraulic pistons.
The alternative is to choose a mechanism in which the walking beam is mounted on top of the fluid tank.

[Means for solving problems]

Therefore, when the walking beam is raised, the slab weight is equal to the fluid (water or water-oil emulsion).
while the return travel of the walking beam is ensured by hydraulic nozzles or wheels, sliding blocks or other supports and drive means, such as ore.

The dimensions of the mechanical support and drive means are such that they only support the weight of the walking beam and do not need to support the weight of the slab, so that they are easily removable. It can be made to any size and the volume of its charge remains correspondingly reduced.

[lol example]

1 to 5, which, without discussing the features claimed by the invention, illustrate the method of operation of a walking beam conveyor, lO designating the floor of a blast furnace, 20 a four stage conveyance Figure 3 shows the walking beam in its lowered position at the beginning of the first stage of the cycle.

The above figure schematically shows, seen from the side, only one floor valve and only one walking beam; any conveying device of this type has one multi-segmented floor and only one walking beam. 1
A strong walking beam and a walking beam are provided integrally with each other.

30, 31, and 32 are three side-by-side slabs arranged to run vertically through the blast furnace.

At the beginning of the first stage (see Figure 1) the slab 30,
31 and 32 are placed on the floor 10.

At the beginning of the first stage, the vertically movable walking beam 20 is in its lower position and in its most retracted vertical position with respect to the conveying direction of the conveyor indicated by the arrows F, ``Q'' in FIG. .

During the first stage of the transport cycle, the walking beam 2
0 is raised vertically until its upper surface projects above the surface of floor 10, so that slab 30.31.32 floor 1
It is raised from 0. The final position of the first stage of the conveying cycle is shown schematically in FIG. 2, where the arrow F□ indicates the transverse direction of the walking beam.

In the second stage of the conveying cycle (see Figure 3), the walking beam moves in the direction of arrow F, so that the slabs 30, 31 and 32 are advanced while resting on the walking beam 20, and the floor is No load is applied to the slab. Figure 3 shows an intermediate position during the second stage of the transport cycle.

At the end of said second stage, the slab assumes the longitudinal position of the slab which immediately preceded it in the transport direction at the beginning of this cycle, i.e. at the end of this second cycle, as shown in FIG. Thus, at the end of the first stage of the conveying cycle, the slab 31 is located in the longitudinal position occupied by the slug f32 when the mass-slazo longitudinal cycle has not yet begun.

The distance between the axis of one slab and the axis of the next (
D) t-j Therefore, it represents the conveying step tube of a walking beam conveyor.

During the third stage of the conveyance cycle, the walking beam
It is moved vertically downwards along the direction of arrow F, until its upper surface is located below the surface of the floor 10, and the floor 10 again supports the weight of the slab. Accordingly, the slab is released from the weight line walking beam 20.

At the end of the vn3 cycle, as shown in Figure 4,
The walking beam 20 is in its forward-most longitudinal position and the fourth stage of the carrying cycle is such that the walking beam 20 moves backwards and downwards of the floor 10 by a distance (D) equal to the pace of the carrying cycle. Ru.

At the end of the fourth stage of the transport cycle, arrow F4 indicates the direction of movement of the walking beam, as shown in FIG. Match.

Comparing Figures 1 and 5, it can be seen that the walking beams are in the same position, while slabs 30 and 3
1.32 are all advanced by one step (D), i.e. at the end of the fourth step, slab 30 is in the position of slab 31 at the beginning of the first cycle, and the same goes for the pair of slabs 31 and 32. I can say it.

Having thus described the steps of a walking beam conveyor, the improvements claimed by the present invention will now become clearer.

Referring to FIGS. 6 and 7, the floor 110 consists of vertical members lined with hard-to-melt material, which also includes a vertical bladder y projecting from the furnace side wall 111.
) 110' to 9 standing.

In this case, the bracket 110' is connected to the cross member 112, which is supported by the brickwork 114' of the furnace wall 111.
' and a longitudinal member 113'.

Intermediate floor valve 110 expanded, transverse structure 1 supported by longitudinal members 113 supported by support columns 114
It is placed on 12.

The walking beam 120 is supported by a transverse structure 122 which also includes a longitudinal structure 123.
This structure 123 is placed on a support column 124
1 and supported by a lattice foam 50.

The top form 50 is provided with support means or legs 51, which will be described later.

In accordance with the present invention, the sill foam 50 is provided with a seal 52 between the sill foam 50 and the base surface to maintain increased fluid pressure.

In the position shown in FIG. 6, no fluid is supplied to the underside of the platform 50 and the lower edge of the seal 52 is in contact with the floor plate 53. The walking beam 120 is
Therefore, it rests on the floor plate via the support 51.

Such a position is such that the walking beam travels backwards before the start of the first stage of the transport cycle, during the third stage, and at the end of the lowering stage of the transport cycle #! This is the position occupied in the previous stage of all four stages.

During the fourth or retraction phase of the walking beam as shown in FIG.
I have to move the upper side.

As for this support, its description and name are those of a common tortoise.

either by means of a hydraulic nozzle mechanism or by means of a return run of the support produced by a conventional kinematic mechanism;
It is practically necessary to provide suitable guidance to enable correct running of the support 51. The choice between the above measures is made possible by the fact that during the return trip the walking beam is loaded only by its own weight.

It is clear that this is not the case when the walking beam carries the load of the slab 3o and travels horizontally during the second conveying phase.

As shown in FIG. 7, in this case, according to the invention, the lifting of the walking beam 120 and the slab 3o is carried out by means of the platform 50 and/or the rad, and a pressurized fluid layer is released from the lower edge of the seal 52. Even when there is continuous leakage, the friction required for the running of this walking beam is negligible even when the walking beam is under the load of the slab 30.

For this reason, the friction generated by the horizontal movement of the walking beam 120, which in this case carries the weight of the slab 30, is small, so that no movement mechanism of any small power and size can cause the movement of the walking beam in the longitudinal direction. It will be possible to bring the running pipe.

Although this mechanical movement is not shown in detail in the drawings, it can be performed by a person skilled in the art.
This can be done, for example, by a simple circular chain between two transmission wheels, one of which is the drive gear.

The raising of the walking beam is carried out very simply by opening the pressure fluid supply pulp below the seal 52, while the downward vertical movement of the beam prevents the supply of fluid below the seal, even in part. You can get it by stopping.

In order to prevent industrial leakage from the blast furnace and associated damage to the structure, a hydraulic seal consisting of a fixed vertical tank 70 is provided within which the bulk of the walking beam is connected to the drum. (Partition wall) 71 is provided.

The fixed 2-A support mechanisms 112, 113, 114 are the support mechanisms 122° 123.1 of the walking beam 120.
24 and in which the walking bee A 120 is directly or indirectly supported by the fluid pack V platform 50 can be made in any other manner.

[Brief explanation of drawings]

# from the 111th &! Figure 5 shows the continuous operation of the walking beam conveyor; Figure 6 is a partial sectional view of the walking beam conveyor according to the invention, showing the ToD slab supported by the floor in the lowered position of the walking beam; FIG. 7 is a view similar to FIG. 6 showing the position where the walking beam is raised and supporting the slab. lO... Blast hearth, 20... Walking beam,
30.31. ．． 32...Slab, 50...Dela, toform, 51...Supporting member, 52...Seal, 5
3... Floor surface, 110... Blast hearth, 110'...
Bracket, 111... Blast furnace wall, 120... Walking beam. Patent Applicant Nuobita) Hri% Sochetape V Azioni Patent Agent Patent Attorney Akimizu Ro Patent Attorney Kazuyuki Nishidate Patent Attorney Kyo Nakayama Patent Attorney Akira Yamaguchi Patent Attorney Masaya Nishiyama 7th

Claims (1)

[Claims] 1. A walking beam conveyor for slabs in a reheating type blast furnace, comprising two sets of alternating parallel beams, the first set of the beams being fixed in position; Second
The beams of the first set of beams have a horizontal path in the direction of Pumbaa running in which these walking beams run above the height of the fixed beams, and these walking beams also have a height υ above the height of the walking beams of the first set. In a walking conveyor that can move integrally along one closed track with a second horizontal path in the opposite direction moving downwards, the vertical movement of the walking beam is carried out on a fluid arm platform. All features are made by a walking beam conveyor. 2. The longitudinal movement of the walking beams is carried out by means of a suitable mechanical movement mechanism capable of moving these walking beams in both directions, independent of the height of the walking beams.
Conveyor as described in section. 3. Conveyor according to claim 1, characterized in that the mechanical movement mechanism consists of a circular closed chain between two transmission wheels, one of which is a drive wheel. 4. If the walking beam is deactivated during its horizontal return travel, the movement is due to sliding blocks and/or wheels resting on the support surface).
Conveyor according to one of the preceding claims, characterized in that: