JPS6311152Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention is intended for use in internal refractories of metallurgical reactors such as various converters, such as top-blown or bottom-blown converters, or top- and bottom-blown converters. It relates to construction work equipment.

(Prior Art) Various working devices have been developed and put into practical use for constructing the internal refractories of the reactor, but there is a strong demand for increased work efficiency and reduction of equipment costs, and in addition, large-scale construction of the internal refractories is required. As plans began to extend reactor life through heavy reactor loading, well-known working equipment was unable to meet these demands and needed to be improved.

Various general functions required of the working device are well known, and various ideas have been proposed for structures and devices for the purpose.

In other words, in order to carry the internal refractories into the furnace, it is necessary to use a hoist or a conveyor such as a bucket conveyor. Therefore, a cylindrical tower called a tower is used as a guide, and in addition to guiding the movement up and down, the conveyor A means is adopted to support the work floor and connect it to the lower work floor to maintain work safety.

Internal refractories are piled up from the bottom of the furnace, so
The cylinder tower must be successively moved to the upper part as it is stacked, and there is also a device in which only the lower working floor is slid onto a fixed cylinder tower to be raised and lowered, but this has the problem that the equipment becomes extremely bulky. Now, in order to move the cylinder tower mentioned above in the vertical direction, there is a device described in Japanese Patent Application Laid-Open No. 49-8404 as a device in which the cylinder tower itself is formed to be expandable and retractable. Although it is necessary and has excellent workability, there are problems in that the equipment cost is high and a large amount of work is required for installation adjustment.

Next, when raising and lowering the lower working floor, it is necessary to provide a fall prevention mechanism to prevent the lower working floor from falling into the hearth bottom due to an unexpected accident. Publication No. 114769 discloses a device in which a chain is fixed to a tower and a sprocket and a ratchet mechanism are combined to prevent the tower from falling. However, the equipment cost is high, and the purpose of reducing construction costs and simplifying maintenance and inspection is difficult to achieve. Challenges remain.

Next, internal refractories, such as lining refractory bricks, have been made to have a larger unit weight as mentioned above to shorten construction time and extend the life of the furnace. The conventional method of manually transporting and stacking firebricks is not only dangerous, but also poses a major problem in terms of work efficiency.

(Problems to be solved by the invention) The invention provides a reactor construction work device that has low equipment costs, a compact mechanism, and is safe and has good workability even when using large unit weight firebricks. The purpose is to

"Structure of the invention" (Means for solving the problem) In order to reduce equipment costs, the inventors of the present invention constructed a cylindrical tower for loading and unloading goods, usually called a tower, which is 1/3 of the height inside the furnace of the target furnace. A plurality of joint cylinders were made into a unit cylinder having a length of about 1/5. In this way, the cylinder body itself can be made simple and strong, although it requires multiple connection and disconnection operations from the beginning to the end of construction. In addition, if one or both of the upper and lower edges of the cylinder are formed into a flange structure, and a means for connecting and disconnecting is adopted by means of a screw connection, the work can be very simple. In some cases, it is also possible to employ clamp joining.

Next, the cylindrical tower is not of a rotating structure, but is suspended from the upper working floor, which is placed on a support such as a building or a converter hood support stand, so that it can be raised and lowered using a lifting device, such as an electric winch. The cylinder tower is mounted so as to be swingable via a hinge device, and the cylinder tower is structured to slidably fit into the guide port of the upper working floor.Furthermore, if the lower article carry-out port is opened in four directions, the cylinder tower can be opened in four directions. Refractories in the furnace can be constructed quickly without rotating the furnace.

In addition, heavy-duty refractory bricks, for example, weigh 40
A lifting support arm that can be freely extended and retracted from the cylindrical tower toward the furnace wall is useful for stacking up to 80 kg in an appropriate location, and it also firmly grips or holds the refractory bricks and allows them to be placed at the desired location. For this purpose, a well-known vacuum-type adsorption/conveying device is suitable. Work inside the furnace can be done efficiently.

Next, in case the lower work floor falls toward the hearth during construction due to, for example, a breakdown in the lifting device, this could cause a serious accident as mentioned above, so in this device, as a simple and reliable means, two or more chains, i.e., fall prevention chains, are hung downward from the bottom of the upper work floor, and are suspended near the hearth through a through gap, such as a through hole or a notch, provided in the lower work floor, and a screwing device is provided on the lower work floor around the through gap, and a vault is screwed detachably into the unit ring of the chain. With this means, unless multiple chains or vaults are broken at the same time,
There is no risk of falling, and these components can be constantly monitored and easily inspected, making it extremely safe. Furthermore, when it is necessary to slightly raise or lower the lower work platform, the length of each ring can be adjusted, making it extremely easy to work with.

(Function) Next, the configuration and function of the present invention will be explained with reference to the drawings. FIG. 1 is a schematic explanatory diagram of a working device according to an embodiment of the present invention, in which 1 is a unit cylindrical body 1a,
1b, 1c, and 1d are connected to each other for carrying in and out articles, and a hinge device 3 is attached to the lower work floor 2.
It is pivotally locked through the .

4 is placed on a hood support stand 5 on the upper working floor, and the central part is open and there are guide wheels or sliding guides 6 that are in contact with the cylindrical tower 1 so that the cylindrical tower 1 can be raised and lowered freely. A guide port 40 is formed. 7 is the prime mover of the lifting winch, and 8 is its winding drum. One end of the wire 9 is fixed to a locking tool 10 provided on the lower work floor 2, and the other end is locked to the winding drum 8. Therefore, by driving the prime mover 7 via a control device (not shown), the cylinder tower 1 can be moved up and down.

11 is a fall prevention chain with one end connected to the upper work floor 4
It is fixed to a hanging ring 12 provided at the lower part of the work floor 2, and the other end thereof is suspended long enough to reach above the hearth brick 14 through a through hole 13 provided in the lower working floor 2. 15 is a screwing device provided around the through hole 13 of the lower work floor 2 (details will be explained later)
By bolting the fall prevention chain 11, the lower work floor 2 and the chain 1 are connected.
1 is engaged. Now, the lower working floor 2 is moved upward every time a certain amount of fireproof bricks are piled up.
In that case, the chain 11 will loosen, so each time it is loosened, it is unscrewed and screwed again at an appropriate position. In this case, if the screwing work is performed for each of the plurality of fall prevention chains 11, there is no risk of danger. Usually, the refractory bricks are stacked from the bottom of the furnace to the top, so there is no risk of screwing defects.

Next, the lower part of the cylindrical tower 1 has a plurality of openings equipped with article carrying out ports, for example, a plurality of doors 16 that can be opened and closed. The firebrick aggregates 17 and 18 are pulled out to the lower work floor 2 by opening the door 16.

The opening/closing door 16 is useful for ensuring the safety of workers working on the lower work floor 2 in the event that the refractory brick 18 accidentally falls during hanging, and is kept closed except when the refractory brick is being pulled out. An example of its structural details will be described in detail later. The refractory brick block 18 is slid by the worker on a roller stand 20 stretched over a telescopic extension beam 19 provided on the lower work floor 2, and is moved to a predetermined position 18a.
drawn out.

21 is a pantograph type support arm and the furnace wall 22
It is expandable and retractable in the direction, and furthermore, a bearing 2 is attached to the cylinder 1d.
3a, 23b and a rotation shaft 24 to be swingably supported.

25 is a refractory adsorption and transportation device attached to the tip of the support arm 21, and the well-known vacuum system is useful; 26 is an operation switch for adsorption and removal;
41 indicates an adsorbed unit refractory brick. 27 is an example of a position that can be reached when the refractory adsorption and transportation device 25 is extended.

As is well known, the converter 28 is configured with an upper constriction, so as the internal refractory 29 is built, the prime mover 7 is operated to convert the cylinder tower 1 and the lower working floor 2 into
Lift up like a, 2b, 2c, 2d. Therefore, the extension beam 19 is extended as shown by 19a or contracted as shown by 19b and 19c along the way. This expansion and contraction of the extension beam 19 is performed by input by the operator.

Now, as the lower working floor 2 rises, it becomes necessary to shorten the cylinder tower 1 as well. Therefore, the cylinders 1a and 1b are sequentially
Remove in this order. Reference numeral 30 denotes a guide for carrying the refractory brick blocks 17, 18, etc. into the cylindrical tower 1, that is, an article loading port, and is replaced when the cylindrical bodies 1a, 1b, etc. are joined or separated.

31 and 32 are handrails attached to the upper work floor 4 to prevent falling.

Since the construction work device of the present invention is configured as described above, assembly and disassembly are extremely quick and easy, the equipment cost is low, and workability is good. can be easily implemented.

FIG. 2 is a top view of the upper working floor 4, and the same reference numerals as in FIG. 1 are the same devices, so a description thereof will be omitted.

In the figure, 33 is a pinion for power transmission.
4 is a roller chain.
The lower work floor 2 (not shown) is raised and lowered synchronously by using four winding drums 8a to 8d.

FIG. 3 is a schematic top view with a part of the lower working floor 2 omitted. The main frame 38 of the lower working floor 2 is composed of a welded structure of a horizontal beam 35, a diagonal beam 36, a ring beam 37, and an extension beam. 19a-19j
are housed in case beams 39a to 39d (numerals below 39d are omitted) which are fixed to the frame 38 in the radial direction.
a, 42b, and 42c (numerals below 42c are omitted) are stored in a manner that can be freely accessed and removed. 43a, 43b, 43c
(Symbols below 43c are omitted) are horizontal connecting beams, such as extension beams 19d, 19e and 19e,
19f are firmly connected by well-known means such as fitting, screwing, or pinning. A workplace is formed by erecting a scaffolding board (not shown) on top of the structure constructed in this way. Similarly 44a-44
c is a horizontal connecting beam that connects the two-stage beams, and the same goes for erecting scaffolding boards.
In the present invention, this extensible structure made up of a group of beams that can be freely moved in and out is called a horizontally extensible floor beam.

FIG. 4 shows a door 16 provided at the bottom of the cylinder tower 1.
In the schematic explanatory diagram of the configuration, a door 16 is housed in the lower double wall 1e of the cylinder tower 1 so as to be freely accessible. The door 16 is engaged with a balance weight 46 via a wire 45, and is supported by a rotating shaft 47 so as to be able to move up and down. Therefore, the door 16 can be easily opened and closed by the operator's input.

FIG. 5 is a schematic explanatory diagram of the fall prevention device according to the present invention, in which the fall prevention chain 11 is a through-hole provided in the lower work floor 2 (for example, a part of the frame 38) suspended from the upper work floor as described above. It passes through the hole 13 and hangs downward.

Reference numeral 48 denotes a main body hardware of a box-type screwing device with an open top and bottom, and in this embodiment, it is a through hole 1 of the lower work floor 2.
It is welded on top of 3. Therefore, the fall prevention chain 11 passes through the main body hardware 48 and the through hole 13. At this time, the hole 4 drilled in the main body hardware 48
9 and the unit ring 50 of the fall prevention chain 11
(In the figure, it is shown facing the front for convenience of explanation, but in reality it is in a horizontal position) through the vault 5.
1 is inserted and the pin 52 is used to prevent it from falling off. As described above, the configuration of the present invention is simple, robust, and easy to operate, so it is extremely safe.

(Example) In the present invention, the height of the cylinder tower 1 (from the lower working floor 2 to the guide 30) is approximately 11 m, the internal diameter of the cylinders 1a to 1d is approximately 1.1 m, and the stroke of the support arm 21 is 2.2 m.
A construction work equipment was manufactured with the minimum diameter of the lower working floor 2 being approximately 3.0 m and the maximum diameter when extended to be 6.0 m, and construction using long large unit weight fireproof bricks with a unit weight of 60 kg was carried out.
When conducted on a 170 ton converter, the work time was reduced by approximately 10 to 10 hours compared to when using a well-known construction work device.
It became possible to reduce the amount by 20%.

(Effects of the invention) As mentioned above, the device of this invention not only can significantly shorten the working time, but also has the remarkable effect of being able to build safely and reliably using large unit weight firebrick, which is rarely seen before. It has an economical effect of being inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the reactor construction work equipment according to the present invention, Fig. 2 is a schematic top view of the upper working floor,
FIG. 3 is a schematic top view of the lower work floor, FIG. 4 is a schematic explanatory diagram of the structure of the door, and FIG. 5 is a schematic explanatory diagram of the fall prevention device according to the device of the present invention. 1 is a cylinder tower for loading and unloading articles, 1a to 1d are unit cylinders, 2 is a lower working floor, 3 is a hinge device, 4 is an upper working floor, 5 is a hood support stand, 6 is a guide, 7 is a prime mover, 8 , 8a to 8d are winding drums, 9 is a wire, 10 is a locking device, 11 is a fall prevention chain, 1
2 is a hanging ring, 13 is a through hole, 14 is a hearth brick, 15
is a screwing device, 16 is a door, 17 and 18 are fireproof brick blocks, 19 is an extension beam, 20 is a roller stand, 2
1 is a support arm, 22 is a furnace wall, 23a, 23b are bearings, 24 is a rotating shaft, 25 is a refractory adsorption and transportation device, 26 is an operation switch, 27 is a position example, 28
is a converter, 29 is an internal refractory, 30 is a guide, 3
1 and 32 are handrails, 33 is a pinion, 34 is a roller chain, 35 is a horizontal beam, 36 is a diagonal beam, 3
7 is a ring beam, 38 is a skeleton, 39a to 39d
is a case beam, 40 is a guide port, 41 is a unit refractory brick, 42a to 42c are two-stage extension beams, 43
a~43c, 44a~44c are horizontal connecting beams, 4
5 is a wire, 46 is a balance weight, 47 is a rotating shaft, 48 is hardware for the main body of the screwing device, 49 is a hole, 5
0 is the unit ring, 51 is the vault, and 52 is the pin.

Claims (1)

[Scope of Claim for Utility Model Registration] An upper working floor that is provided with a guide port for a cylinder tower for carrying in and out of goods in the center of the floor and that suspends the lower working floor so that it can be raised and lowered via a lifting device; An entrance for carrying in and out of goods in the center. a lower working floor comprising a joint-type article loading/unloading tower having a horizontally expandable floor beam; a support arm that is extendable and retractable in the horizontal direction; a refractory suction and transportation device attached to the tip of the support arm; one end of which is locked to the lower part of the upper work floor, and the other end of which is provided to the lower work floor; A lower work floor fall prevention device consisting of a fall prevention chain suspended so as to reach the bottom of the converter through a through gap, and a device fixed around the through gap and removably screwed into the fall prevention chain; Reactor construction work equipment.