JP2023144450A - Brick wall support apparatus - Google Patents

Abstract

To provide a brick wall support apparatus capable of easily and safely supporting plural fire-resisting bricks before mortar solidification lined into an arch shape to an internal space such as a furnace wall upper part of a furnace body of a torpedo car, in a short work time.SOLUTION: When fire-resisting bricks are piled up in an arch shape at a furnace wall upper part 12a of a furnace body 12 of a torpedo car 11, a brick wall support apparatus 10 of the torpedo car freely runnable by a carriage 13 is mounted on a work floor 31 temporarily provided inside the furnace body 12, and respective fire-resisting bricks 18 lined into an arch shape are supported by pressure from inward to the furnace wall upper part 12a by brick support members 21 provided at a tip part of rods 15a of plural air cylinders 15 radially arranged at the carriage 13. In this way, the respective arch-arranged fire-resisting bricks 18 before mortar solidification can be easily and safely supported in a short work time.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a brick wall support device used for circularly cutting refractory bricks in an internal space, for example, on the upper part of a furnace wall of a torpedo car furnace body.

A torpedo car (pig-mixing car) that transports hot metal tapped from a blast furnace to steelmaking equipment such as a converter is loaded with a tank-shaped furnace body whose furnace wall is lined with refractory bricks.
However, these refractory bricks are susceptible to damage due to thermal shock caused by rapid temperature changes, shock caused by the flow of high-density hot metal, and even deterioration due to iron oxide that has penetrated into the bricks. For this reason, repair work is periodically carried out to remove the refractory bricks from the furnace walls and replace them with new refractory bricks.

In particular, when lining the upper part of the furnace wall in the conical part of the front and rear sides of the furnace body with refractory bricks, skilled workers manually stack multiple refractory bricks in an arch shape, a process known as circular lining. ing.
During conventional circular webbing, workers on a temporary work floor set up inside the furnace support the refractory bricks lined with mortar on the furnace wall using arc-shaped webbing frames and bar jacks. (See Non-Patent Document 1).

"Furnace Construction Skills Manual - Basic Edition", Small and Medium Enterprises Corporation Information and Technology Department, July 2000, Small and Medium Enterprises Corporation, Internet URL <http://www.monozukuri.org/techno/technote022. pdf＞

However, if a worker were to manually cut the refractory bricks into the upper part of the furnace wall using a frame or the like, the work would require skill and take time. Not only that, but the refractory bricks that had not yet hardened with mortar could fall off the furnace wall during work, potentially injuring workers, posing a safety issue.

Therefore, as a result of intensive research, the inventors found that a support platform (a "brick wall support device for a torpedo car that can be driven by a trolley") was placed on a temporary work floor set up inside the reactor body to provide support during this circular quake. A plurality of brick supporting members connected to the ends of the rods of a plurality of supporting cylinders arranged radially on the table support each refractory brick, which is lined in an arch shape on the upper part of the furnace wall, from the inside before solidifying with mortar. The present invention was completed based on the finding that all of the above-mentioned problems could be solved by supporting the present invention.

That is, the present invention provides a brick wall support that can easily and safely support a plurality of refractory bricks lined in an arch shape on the upper part of the furnace wall of the furnace body of a torpedo car, in a short working time, and which have not yet been hardened with mortar. The purpose is to provide equipment.

The invention according to claim 1 includes a support stand placed on a work floor temporarily installed in a closed space, and a plurality of support cylinders arranged radially on the support stand, and the plurality of support cylinders A brick wall support is provided at the tip of the rod with a plurality of brick support members each pressing from inside to support a plurality of refractory bricks lined in an arch shape on the upper part of the furnace wall of the furnace body. It is a device.

Although the type and size of the support stand is arbitrary, it must be able to withstand the weight of the support cylinder. Note that the support stand may be a movable trolley. The trolley may be of a self-propelled type having various drive parts, or may be of a manual type.
The type of support cylinder is not limited. For example, an air cylinder, an electric cylinder, a water pressure cylinder, a hydraulic cylinder, etc. can be used. In addition, the driving source can be pneumatic and the inside of the cylinder is oil.Furthermore, the supporting cylinder can be supported manually using a fixing jig such as a telescopic bar and bolts. Good too.
The number of support cylinders used is arbitrary as long as it is two or more. However, it is preferable to use 5 to 17 refractory bricks so that the plurality of refractory bricks lining the upper part of the furnace body in an arch shape can be supported at pitches of 10° to 30° in the circumferential direction of the furnace body.

The maximum stroke of the rod of each support cylinder is appropriately changed depending on the internal space, for example, the size of the furnace body of a torpedo car. For example, a stroke of 1 m to 1.2 m may be used.
The arrangement position of each support cylinder on the support stand (truck) is arbitrary. However, in the case of a truck, the center part of the loading platform (upper plate) is preferable in consideration of the stability of the truck.

Moreover, the material of the brick supporting member is not particularly limited as long as it can ensure the strength to support the bricks. For example, in addition to various metals such as iron, steel, and aluminum alloy, various woods, various ceramics, and various synthetic resins may be used.
The shape of the brick support member is not limited. For example, it may be a polyhedron (including a rectangular parallelepiped) curved in an arc shape when viewed from the front.
The size of the brick support member is also arbitrary. For example, the size may be such that only one refractory brick can be supported, or the size may be capable of supporting a plurality of refractory bricks at the same time.

Moreover, the invention according to claim 2 is the brick wall support device according to claim 1, wherein the plurality of support cylinders are air cylinders.
Furthermore, the invention according to claim 3 is the brick wall support device according to claim 1, wherein the plurality of support cylinders are hydraulic cylinders.

According to this invention, when an internal space, for example, an upper part of a furnace wall of a torpedo car, is to be lined with refractory bricks, a brick wall support device is placed on a work floor temporarily installed inside the furnace.
Thereafter, the radial direction in which the support cylinders are lined up is aligned with the circumferential direction of the furnace body.
Next, according to the progress of the circular warping, each rod is projected from each support cylinder, and the corresponding refractory bricks lined in an arch shape on the upper part of the furnace wall are moved by the brick support members connected to the tips of the rods. Support each by pressing from inside.
As a result, multiple refractory bricks lined in an arch shape on the upper part of the furnace wall of a torpedo car can be installed in a shorter time and without the need for skill compared to using conventional frames. Can be supported easily and safely.

In particular, according to the second aspect of the invention, since an air cylinder is used as the support cylinder, even if compressed air, which is the working fluid, leaks from the cylinder, for example, if a hydraulic cylinder whose working fluid is oil is used, In comparison, accidents such as fires caused by leakage of working fluid are less likely to occur.
Additionally, air cylinders are lighter and cheaper than other hydraulic or electric cylinders. Therefore, the weight of the torpedo car brick wall support device in which a large number of support cylinders are arranged can be reduced, the truck can be moved relatively easily, and the cost of the device can be reduced.

Conversely, when an air cylinder is used as the support cylinder, if the amount of air compression is large and it is difficult to support the bricks, a hydraulic cylinder may be used as the support cylinder as in the invention as claimed in claim 3 to support the bricks. can be done safely and easily.

The choice between an air cylinder and a hydraulic cylinder is based on the installation location of the brick wall support device, the weight of the bricks, the condition of the bricks supported by the brick wall support device, etc., as there is a trade-off relationship between the two. good.

FIG. 2 is an enlarged cross-sectional view of a main part showing a state in which refractory bricks are circularly cut over the entire upper part of the furnace wall of a furnace body of a torpedo car using the brick wall support device for a torpedo car according to Example 1 of the present invention. FIG. 2 is an enlarged longitudinal sectional view of a main part showing a state in which refractory bricks are circularly cut in the upper part of the furnace wall of a furnace body of a torpedo car using the brick wall support device for a torpedo car according to Embodiment 1 of the present invention. FIG. 2 is an enlarged cross-sectional view of a main part showing a state immediately before circular warping of refractory bricks in the upper part of the furnace wall of a furnace body of a torpedo car starts using the torpedo car brick wall support device according to Example 1 of the present invention. 1 is an enlarged cross-sectional view of a main part showing a state in which refractory bricks are being circularly cut on the upper part of a furnace wall of a furnace body of a torpedo car using the brick wall support device for a torpedo car according to Embodiment 1 of the present invention; FIG. .

Examples of the present invention will be specifically described below.

As shown in FIGS. 1 and 2, a torpedo car brick wall support device (hereinafter referred to as a brick wall support device) 10 according to a first embodiment of the present invention supports a work floor 31 temporarily installed in a furnace body 12 of a torpedo car 11. It is equipped with a traveling truck 13 and a plurality of air cylinders (support cylinders) 15 arranged radially on a loading platform 14 of the truck 13. In this embodiment, an air cylinder is selected as the support cylinder, but it should be noted that even if a hydraulic cylinder is selected and the other configurations are the same, the same effects can be obtained.

Hereinafter, these structures will be specifically explained.
The furnace body 12 of the torpedo car 11 is made of permanent bricks 17 whose main components are waxite (Al2O3, SiO2) and waxite-SiC on the inner surface of an oblong tank-shaped iron shell 16 with a diameter of approximately 4 m. The refractory brick (wear brick) 18 with a thickness of 20 cm, which is the main component, is sequentially lined.

The trolley 13 is of a hand-pushed type, and four tires 13a are arranged at each corner of a loading platform 14 having a square shape of 1 m on a side.
Further, in the center of the loading platform 14, a semicircular cylinder connecting plate 30 having a radius of approximately 30 cm and extending in the width direction of the loading platform 14 is erected.

The base end portions of twelve air cylinders 15 are connected to the outer peripheral portion of the cylinder connecting plate 30 at a pitch of 15° in the circumferential direction via corresponding bolt and nut structures 19, respectively. Each air cylinder 15 has a length of 60 cm and a stroke of the rod 15a of 1.1 m.
In addition, at the tip of each rod 15a, there are 12 refractory bricks 18, which are lining the upper part 12a of the furnace wall of the furnace body 12 in an arch shape at a pitch of 15°, and support each of them by pressing from inside. A brick support member 21 is provided. Each brick support member 21 is a rectangular parallelepiped made of stainless steel and each side is 10 cm.

Next, a method of using the brick wall support device 10 of the present invention will be described with reference to FIGS. 1 to 4.

As shown in FIG. 3, when the upper part 12a of the furnace wall of the furnace body 12 of the torpedo car 11 undergoes a circular crack, the floor material carried in from the pigtail receiving port (not shown) of the furnace body 12 is first assembled, and the work is carried out inside the furnace body. A floor 31 is constructed. Thereafter, the brick wall support device 10 is lowered onto the work floor 31 through this pigtail receiving port.
Next, the worker manually pushes the cart 13 along the virtual center line in the width direction of the work floor 31 to the "circular edge" working position on the upper part 12a of the furnace wall (see also FIG. 2). After reaching the working position, the radial direction in which the air cylinders 15 are lined up is aligned with the circumferential direction of the furnace body 12.

Next, as shown in FIG. 4, an operator applies mortar to each refractory brick 18, and applies mortar to the permanent brick 17 lined with the iron skin 16 of the upper part 12a of the furnace wall of the furnace body 12. Perform a circular lining, starting from the bottom of the left and right sides to the top.
At that time, depending on the progress of this circular warping, compressed air from a compressor (not shown) outside the furnace is supplied to the corresponding air cylinders 15 sequentially starting from those arranged on both the left and right sides. 15a are made to protrude by a predetermined length, and brick support members 21 disposed at the tips of these rods 15a are pressed against the corresponding refractory bricks 18 to support them from inside.
Finally, 12 refractory bricks 18 are piled up in an arch shape, each supported by 12 air cylinders 15, over the entire circumferential area of the upper furnace wall 12a (see FIG. 1).

In this way, by circularly warping the upper part 12a of the furnace wall using the brick wall support device 10, the upper part 12a of the furnace wall 12a of the furnace body 12 of the torpedo car 11 is covered with multiple pieces of mortar lined in an arch shape before hardening. Even an unskilled worker can easily and safely support the refractory bricks 18 in a short working time compared to the case of using a conventional frame or the like.

Further, here, an air cylinder 15 is employed as the support cylinder. Therefore, even if compressed air, which is the working fluid, leaks from the air cylinder 15, accidents such as fires caused by this fluid leakage are less likely to occur, compared to, for example, a hydraulic cylinder that uses oil as the working fluid. .
Furthermore, the air cylinder 15 is lighter and cheaper than hydraulic or electric cylinders. Therefore, the weight of the brick wall support device 10, which includes a large number of air cylinders 15, can be reduced, the movement of the truck 13, etc. becomes relatively easy, and the cost of the device can be reduced.

In addition, after the mortar of each refractory brick 18 being pressed is completely solidified, the rods 15a of all the air cylinders 15 are pulled back, and the operator manually pushes the trolley 13 to move it to the next circular warping position, and then the above-mentioned process is performed. Repeat the work you did.
Finally, after the circular warping is completed over the entire area of the upper part 12a of the furnace wall of the furnace body 12, the brick wall support device 10 is lifted up from the pigtail receiving port and removed (the same applies to the work floor).

This invention is a useful technique when circularly cutting a plurality of refractory bricks onto the upper part of the furnace wall of the furnace body of a torpedo car.

10 Torpedo car brick wall support device 11 Torpedo car 12 Furnace body 12a Furnace wall upper part 13 Dolly 14 Loading platform 15 Air cylinder (support cylinder)
15a Rod 18 Firebrick 21 Brick support member 31 Work floor

Claims (3)

a support stand placed on a work floor temporarily installed in the interior space;
The support base includes a plurality of support cylinders arranged radially,
A plurality of brick support members are disposed at the tips of the rods of the plurality of support cylinders, each of which presses and supports a plurality of refractory bricks lined in an arch shape on the upper part of the furnace wall of the furnace body from inside. Brick wall support equipment. The brick wall support device according to claim 1, wherein the plurality of support cylinders are air cylinders. The brick wall support device according to claim 1, wherein the plurality of support cylinders are hydraulic cylinders.

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