JPH0825618B2 - Method for transporting refractory bricks for kiln furnace refractory lining - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a refractory brick transportation method for building and repairing a kiln furnace having a lining of a fixed refractory brick in various industrial fields including metal refining.

[Conventional technology]

By the way, in the construction and repair of kilns that use standard refractory bricks, the number of refractory bricks is large and the handling is dangerous because it is heavy, and the efficiency is not good, so human labor is required. The use of mechanical transportation means has come to be adopted instead of transportation by.

Thus, taking the converter in the steel industry as an example, the amount of refractory bricks used is extremely large, and as described above, it takes a lot of manpower to carry it in the furnace and the work efficiency is low, so Has developed a method of arranging refractory bricks in the order of building programs and carrying them in using a conveyor device.

For example, Japanese Unexamined Patent Publication (Kokai) No. 52-133804 discloses means for conveying refractory bricks into a converter in program order by using a conveyor device.

[Problems to be Solved by the Invention]

The inventors of the present invention have found that there are the following problems in performing lining construction using a furnace construction tower equipped with a tray elevator for carrying refractory bricks into the converter furnace.

That is, when the refractory brick 1 is used for a lining having a circular cross-section such as a converter, as shown in FIG. 3, the side surface 2 near the furnace wall (hereinafter referred to as the bottom for convenience of description) is wide, and The side surface 3 (referred to as a head for convenience of description below) has a narrow trapezoidal shape.

Therefore, when the refractory bricks 1 are transferred, the individual refractory bricks 1 are alternately arranged as shown in FIG. 4 in terms of normal transport efficiency, and the refractory bricks 1 are transferred as a three-dimensional pile 4 in which a plurality of layers are stacked.

Therefore, when the refractory bricks 1 are individually dispensed from the three-dimensional pile 4 to the conveyor device in the construction, as shown in FIG. 5, the bottom portions 2 and the head portions 3 are transferred alternately.

Therefore, from the viewpoint of work efficiency of building, a means for reversing the refractory bricks in the opposite posture was developed by installing a brick conveying posture reversing device in the middle of the conveyor device so that the transferred refractory bricks are unified to the posture suitable for building. It is also described in JP-A-52-133804, and the brick conveying posture reversing device (hereinafter referred to as a reversing device) is manually rotated, or is reversed only when the operator determines the brick to be reversed. The device is electrically driven.

However, in addition to the increasing demand for shortening the construction period in recent years, a large-sized refractory brick with a unit weight of 40 to 80 kg and a length of 1000 to 1200 mm is adopted for the purpose of extending the life of the refractory brick. Therefore, it is dangerous to manually turn over the large refractory brick in a short time, and it is dangerous for the operator to operate the control switch each time, which causes a significant difference in the refractory brick transportation time interval. As a result, there was a problem that congestion occurred at each location on the transportation line.

That is, taking a converter as an example, since 20,000 or more refractory bricks must be carried in during the construction period of 3 to 4 days, for example, at a rate of 1 in 5 seconds and within an error range of ± 0.2 seconds. Transportation is required.

However, in the conventional known method, the refractory bricks that should be accurately inverted and the refractory bricks that do not need to be inverted in such a short time are discriminated to perform proper inversion to unify the posture, and at a substantially constant time interval. I can't find a way to carry refractory bricks.

It is an object of the present invention to provide a refractory brick transfer method for a kiln furnace refractory lining that determines whether or not reversal is necessary within a preset substantially constant time and does not cause a slow speed in the transfer by performing appropriate reversal. .

[Means for solving the problem]

The present invention, in order to solve the above problems, as a means for achieving the object, in the kiln furnace refractory lining construction, in transporting the refractory bricks in advance in the order of the building program, provided with a brick transport attitude determination device in the transport system path, then When a brick conveying posture reversing device equipped with a variable speed conveyor device is provided at the front and rear, and when the brick to be reversed by the posture determination device is detected, the speed increasing control of the variable speed conveyor device is performed to perform the reversing operation. With the provision of a refractory brick conveying method for kiln furnace refractory lining that conveys refractory bricks at substantially constant time intervals, the timing control is started at the same time as the speed increasing control command of the variable speed conveyor device, and the next step below the set time is performed. A refractory brick transfer method for a kiln furnace refractory lining that restricts transfer.

[Action]

In the method of the present invention, a brick transportation posture determination device is provided in the transportation route, and the posture of a refractory brick that is moving is automatically determined in a short time. It is highly efficient because it does not require and the false determination rate is very low.

In addition, a variable-speed conveyor device is installed before and after the brick conveying posture reversing device, and refractory bricks that do not need to be reversed are passed at a preset time, and in the case of refractory bricks that should be reversed, the time spent for reversing. In consideration of the above, since the speed of the variable speed conveyor device provided before and after the reversing device is controlled and the refractory bricks are conveyed for a certain period of time, there is no risk of the refractory bricks being stagnant and the conveying efficiency is increased. This enables stable construction work and enhances safety.

Furthermore, by starting the timing control at the same time as the speed-up control command of the variable speed conveyor device and limiting the subsequent process transportation within the set time, it is possible to eliminate the risk of refractory bricks being transported at a dangerous transportation speed. And

〔Example〕

FIG. 1 is a schematic explanatory view relating to an example of an apparatus for carrying out the method of the present invention, and 5 is a brick conveying posture reversing device (hereinafter referred to as a reversing device), which comprises a belt conveyor 6 which can be rotated forward and backward. I have it.

The conveyors 7, 8 and 9 are then provided in front of or on the inlet side of the reversing device 5 and the conveyors 10, 11 and 12 are provided behind or on the outlet side of the reversing device 5.

Thus, the conveyors 9, 10 and 11 are configured as a variable speed conveyor device, but in the present invention, they are abbreviated as conveyors like other conveyors hereinafter.

Next, 13 to 18 are speed reducers, and 19 to 24 are drive motors for the conveyors 7 to 12.

Further, 25 to 32 are photoelectric switches, 33 is a brick transfer posture determination device (hereinafter referred to as a determination device), and the linear light source lamp 3
4. The image pickup device 35 and the judgment unit 36.

Reference numeral 37 is a comprehensive control device for the conveyors 7 to 12, the determination device 33, and the reversing device 5.

Next, 38, 39 and 40 are speed control inverters, 41 is a turning motor of the reversing device 5, 42 is a reversing control limit switch, 43 is a forward rotation control limit switch, 44 and 45 are drive motors of the belt conveyor 6, and It is a speed reducer.

Next, the method of the present invention will be described with reference to the flowcharts of FIGS.

By turning on the automatic operation push button of the integrated control device 37, the conveyors 6 to 12 are operated at a preset constant speed (hereinafter referred to as constant speed).

The refractory brick 1 (hereinafter referred to as brick) transferred from the conveyor device (not shown) onto the conveyor 7 is conveyed in the direction of the arrow 46, and when the tip of the refractory brick, for example, the head shields the photoelectric switch 25, the determination device 33 operates. , The necessity of reversing the brick 1 is determined.

The photoelectric switch 25 is indicated as P25 in FIG. 2, and the above photoelectric switches are also indicated in the same manner.

Further, the determination device 33 scans the width of the brick that shields the linear light source lamp 34 twice at a set time, subtracts the obtained signal, and determines the posture based on whether the sign is positive or negative. It goes without saying that a similar well-known determination device can be used without departing from the scope.

By the way, the brick 1 which is determined not to need posture reversal is conveyed by the conveyors 6 to 12 operating at a constant speed for a set time, and the next conveying device such as a tray elevator (not shown) is contacted. Conveyor device (not shown)
Sent to

Next, when it is determined that the posture needs to be reversed, the conveyor 9 is switched to high speed operation when the photoelectric switch 26 is shielded by the brick.

Therefore, for high speed operation, the present inventors
Good results were obtained with 1.3 to 1.7 times.

For example, set the constant speed operation speed to 20 m / min and set the high speed operation speed to
30m / min.

When the brick next blocks the photoelectric switch 27, the conveyor 6 of the reversing device 5 is operated at high speed to accelerate the acceptance of the brick, and the photoelectric switch 28 blocks the light and allows the conveyor 9 to pass.
The operation speed of the conveyor 6 is stopped by the photoelectric switch 29 being shielded from light, and the conveyor motor 6 is stopped (see FIG. 2).
(Indicated as M41) is activated, the reversal control limit switch 42 is operated, that is, the reversal control limit switch 42 is rotated by 180 °, and the drive motor 44 and the speed reducer 45 are reversely driven by the operation signal of the reversal control limit switch 42. The conveyor 6 is operated at high speed to send bricks to the next conveyor 10.

Since the conveyor 10 is in a high-speed operation state due to the optoelectronic switch 28 blocking light, bricks moving at high speed from the conveyor 6 can be received without any trouble.

Next, after confirming that the bricks could be transferred without interruption by blocking and passing light by the photoelectric switch 30, the conveyor 6 is returned to a constant speed.

Next, when the brick is moved from the conveyor 10 to the conveyor 11, the photoelectric switch 31 is in a light blocking and light transmitting state, and the signal causes the conveyor 10 to return to a constant speed.

Next, if the control system is highly reliable or the transfer speed is marginal, the bricks are transferred directly to the next process via the conveyors 11 and 12, but it is economical to invest a large amount in the control system. May be disadvantageous.

Therefore, in order to simplify the control system and keep the transport speed substantially constant, the reversing operation is designed to finish a little earlier than the set time, the inverted brick is made to stand by temporarily, and the set time elapses before the transfer. It is economically advantageous to do so, there is little traffic congestion on the transportation route, and work can be performed safely.

Therefore, a timer (not shown) is provided in the total control device 37, the timing is started together with the speed-up control command by the photoelectric switch 26, and the circuit is configured to be closed after a preset time, and the circuit of the conveyor 11 is set. The purpose can be achieved by connecting in series with the restart circuit.

FIG. 2 shows that when a brick on the conveyor 11 shields the photoelectric switch 32 from light, the conveyor 11 is stopped, the brick is made to stand by on the conveyor 11, and the conveyor 11 is operated after waiting for the completion of the timing of the timer. Next, a flow for transferring bricks to the conveyor 12 is shown.

 This is called time control in the present invention.

〔The invention's effect〕

Since the method of the present invention makes it possible to automatically perform brick transfer posture determination and posture reversal, it has a high work efficiency, labor saving, and has remarkable effects on work stability and safety.

Furthermore, by installing a conveyor that can accelerate and decelerate before and after the posture reversing device, there is virtually no loss time during reversing,
It is possible to shorten the transportation time and eliminate the congestion on the transportation route.

Further, the time control can reduce the burden on the equipment and can maintain the accurate conveyance interval, so that the work efficiency is good and it is economically extremely advantageous.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of an apparatus according to an embodiment of the method of the present invention, FIG. 2 is a flow chart according to an embodiment of the method of the present invention, FIG. 3 is a schematic perspective view of a refractory brick, and FIG. FIG. 5 is a schematic perspective view, and FIG. 5 is an explanatory view of the posture of the refractory brick during transportation. [Explanation of reference symbols] 1 ... refractory brick, 2 ... side (bottom), 3 ... side (head), 4 ... three-dimensional pile, 5 ... brick conveying posture reversing device, 6-12 ... conveyor, 13-18 ... Reducer, 19-24 ...
… Drive motor, 25 to 32 …… Photoelectric switch, 33 …… Brick transfer attitude determination device, 34 …… Line light source lamp, 35 …… Imaging device, 36 …… Judgment unit, 37 …… Integrated control device, 38 ……
Inverter, 39 …… Inverter, 40 …… Inverter, 41
...... Turning motor, 42 …… Reversal control limit switch,
43 …… Forward rotation control limit switch, 44 …… Drive motor,
45 …… Reducer, 46 …… Transport direction arrow

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B65G 47/31 E

Claims (2)

[Claims] 1. When carrying refractory bricks in advance in the order of the building program when constructing a kiln furnace refractory lining,
When a brick transfer attitude determination device is installed in the transfer system path, and then a brick transfer attitude reversal device equipped with variable speed conveyor devices is installed in front and rear, and when the bricks to be reversed are detected by the attitude determination device, the variable speed conveyor A refractory brick conveying method for a kiln furnace refractory lining, which conveys refractory bricks at approximately constant time intervals by performing speed-up control of the equipment and performing a reversing operation. 2. The method of conveying refractory bricks for a kiln furnace refractory lining according to claim 1, wherein timing control is started at the same time as the speed increasing control command of the variable speed conveyor device, and conveyance of the next process within a set time is restricted.