JPS61122485A - Method of preventing falling-off of high temperature device lining - 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 present invention is particularly applicable to converters, air furnaces, other smelting furnaces, industrial equipment that performs incineration and high-temperature reactions, and high-temperature industrial equipment ranging from auxiliary equipment such as flues. The present invention relates to a method for preventing the lining from falling off, which is suitable for use in assembling and repairing refractory linings for high-temperature equipment such as equipment.

[Conventional technology]

When constructing or repairing the refractory lining of the high-temperature equipment mentioned above, shaped or unshaped refractories and sometimes the hardware that supports them may fall off, and from the standpoint of occupational accidents and equipment maintenance, it is important to prevent such falling off. Various methods have been adopted to prevent this.

Preventive measures that have been commonly adopted for eel include setting up scaffolding in appropriate locations, making frames made of metal or wood, and using devices that are covered with fibrous or metal nets, or ,
A push plate is made of wood or metal plate, and the push plate is pressed against the fireproof lining using a wooden frame.

This conventional method will be explained with reference to FIG. 9, taking as an example a method for repairing the bottom lining of a converter. A crane 3 is used to suspend repair firebricks 4 into the furnace interior 1a of the converter 1 in advance, and then the crane 3 suspends the net 6 with a wire 7 via the support beam 5, and the shoulder portion IO of the converter 1 is suspended. A method was employed in which workers 8 and 9 descended to the bottom of the furnace using a gondola (not shown) and performed repair work using the refractory bricks 4.

In this method, until the net 6 is assembled and tightly attached,
Workers involved in unloading inside the reactor are left in a vulnerable situation.

In addition, the refractory bricks on the shoulder part 10 of the converter may fall, and the weight of the refractory bricks may be 20 to 30 kg (unit weight).
Therefore, the structure of the net 6 needs to be strong, which increases cost, and furthermore, it takes a lot of effort to stretch the net.

Moreover, it requires a lot of effort and cost, but it also has safety issues.
The problem is that it is not necessarily advantageous.

In particular, such problems commonly exist in equipment for growing refractory linings, such as converters.

As a device for preventing the occurrence of the above-mentioned problem, the inventor of the present application disclosed a fireproof lining fall prevention device in Japanese Utility Model Application No. 58-75074.

As shown schematically in FIG.
~llj are closely connected to each other to form one balloon body 11, to which an exhaust pipe 15 and a check pulp 16 for switching between air supply and exhaust are attached.

During the work, this balloon body 11 is inserted into the converter furnace l from above in a deflated state, and compressed gas is fed through the air supply pipe 14 equipped with the check valve 16 to connect the flexible tube lla = llj is expanded and pressed against the inner wall 1b of the converter l. At this time, in order to prevent mechanical damage to the flexible tubes 11a to llj, a protective curtain 12 consisting of unit protective curtains 12a to 12c should be interposed between the flexible tube 11 and the converter inner wall 1b. Flexible chain 11. The protective curtain 12 is supported by a support beam 17 extending across the opening of the converter 1, and is suspended in the furnace.

This allows the worker to descend into the furnace along the ladder 13 and safely perform work inside the furnace, while the pressing force exerted by the flexible tube 11 prevents the furnace wall bricks from falling off.

[Problem that the invention seeks to solve]

However, with this method, it is difficult to take the flexible chain 11 into and out of the furnace, and it requires considerable effort and effort to carry repair furnace materials and equipment into and out of the furnace.
The present invention guarantees work efficiency and safety when constructing or repairing refractory linings for high-temperature equipment, such as the converter mentioned above, while minimizing costs and effectively repairing the refractory linings. This provides a highly reliable method to prevent falling off.

[Means for solving problems]

In the present invention, an expandable and contractible annular balloon formed by connecting an arbitrary number of cylindrical balloons in parallel is inserted into the high-temperature device in a contracted state, and then a pressure medium is supplied to the annular balloon to expand it. The refractory lining is pressed against the lining surface to prevent the refractory lining from falling off.

FIG. 1(a) shows an example in which the method of the present invention is applied to partial repair of a refractory lining of an upright reactor.

This will be explained with reference to FIG. 2(b) and FIGS. 2(a) and (b).

The first is a partial sectional view of the upright reactor, and the second is a partial cross-sectional view of the upright reactor, and the second is a view taken from the lines ■a-■a and fib-[1b of FIG. 1. In these figures, the annular balloon The body is shown as 22, and is made of an elastic material such as synthetic rubber or other polymeric material that can be expanded and contracted, and a plurality of cylindrical balloon bodies 22a are arranged in parallel and reinforced with fibers or tangible materials as necessary. They are connected to form a ring.

FIG. 3 is a diagram showing an example of the connected state.

In the figure, the aforementioned cylindrical balloon bodies 22a, 22b, 22
c are connected by appropriate adhesive means such as adhesion or screwing via soft membrane-like bodies 26a to 26d such as synthetic rubber, other polymeric materials, or organic or inorganic fabrics. Reference numeral 23 designates an air supply pipe for opening the valve 24 and supplying compressed gas to the annular balloon body 22. Reference numerals 27a to 27d designate air supply/exhaust communication pipes to the respective positions 22a to 22c of the cylindrical balloon body. The annular balloon body 22 having such a structure has soft membrane-like bodies 26a to 2.
If 6d is made into a trapezoidal shape to form an annular balloon body, the shape when inflated can be made into an umbrella shape or a parachute shape.

As described above, the annular balloon body used in the present invention can be formed into an oval shape, a football shape, a spherical shape, etc. by appropriately selecting the length, diameter, etc. of the cylindrical balloon body by making the soft membrane-like body into an appropriate shape. Various shapes such as gourd shape.

It can be adapted to the shape of the internal refractory lining of a high-temperature device, and can be prevented from falling off even when pressed against the lining of any shape and any part.

Figure 4 shows cylindrical balloon bodies 22''~2 with different cross-sectional shapes.
2, each cylindrical balloon body 22f
22 are widely bonded to each other by an outer wall 28.

FIG. 5 is an example showing another connected state, in which a common wall 28a is provided to the cylindrical balloon bodies 221 to 22o having square cross sections, and the wall 28a is provided with a common wall 28a.
For example, a ventilation hole 29 is provided.

FIG. 6 shows still another embodiment, in which each cylindrical balloon body 22p,
22q are connected in parallel via a rod-shaped connecting body 30.

In this way, the annular balloon bodies 22 having various shapes are constructed by using a crane (not shown) from the top opening of the reactor 20 to the damaged part of the lower part of the inner refractory lining 18 of the steel shell 19 shown in FIG. 1(a). Then, the valve 24 provided in the air pipe 23 is opened to send compressed gas to the i* annular balloon body 22 . By this air supply, the annular balloon body 22 is expanded as shown in FIG. 1(b), and the surface of the fireproof lining 18 and the outer surface 25 of the annular balloon body 22 are , 8. )Front side or press 6. : This prevents the refractory lining 18 from falling off.

In carrying out the present invention, it is of course possible to optionally use the protective curtain 12 which has been used in the past.

Furthermore, an annular balloon body 22 that can be suitably used for repairing a converter
The details will be explained with reference to FIGS. 7(a) and (b).

In FIG. 7(a), an upper annular balloon body 22z consisting of a cylindrical balloon body 22p and a lower annular balloon body 22y consisting of a cylindrical balloon body 22r are connected by a detachable carabiner 31b and used as an integrated body. . 32 is a support ring, 33 is a ring for suspending an in/out wire, and 34 is a ring for suspending the annular balloon body 22 as an integral body.

35a and 35b are fasteners for the upper and lower annular balloon bodies 22z and 22y, and the connecting body of the cylindrical balloon bodies 22p and 22r has a band shape, and the fasteners 35a and 35b connect the cylindrical balloon bodies at both ends. This forms integrated annular balloon bodies 22z, 22y. 36a, 36
b is a compressed gas communication pipe, and upper and lower annular balloon bodies 22z
, 22y, which are unit structures, are connected to each other by a zero communication hole (not shown), so that they can be freely supplied and exhausted from each other.

Furthermore, the supply and exhaust hoses 37a and 37b are connected to the supply and exhaust processor.
38a and 38b. Therefore, by operating the supply/exhaust blowers 38a, 38b, the annular balloon bodies 22z, 22y can be expanded and deflated to change their shape.

FIG. 7(b) is a view taken from line BB in FIG. 7(a), and the symbols of each part correspond to those in FIG. 7(a). In this example, the annular balloon body 22 is constructed by stitching eight blocks together, and 39 is a wire for carrying in and out of each block.

〔Example〕

The process of repairing the refractory lining of a 300-ton converter using the annular balloon body shown in FIG. 7 will be explained with reference to FIGS. 8(a) to 8(f). The weight of the annular balloon body was 200 to 400 mm, the internal pressure was 0.3 to 0.5 kg/cm2, and the length was approximately 2800 to 3900 mm. The shape when expanded is as shown in Figure 7(a), with an upper diameter of 4000 mm.
~4500m and a lower diameter of 6900~7800mm was adopted.

FIG. 8(a) is a schematic diagram showing the charging situation of the annular balloon body 22 in a converter. It is lowered into the converter using a crane.

Therefore, in this example, illustration of permanent bricks is omitted for convenience of explanation.

Next, as shown in FIG. 8(b), the air pump 40 sends compressed air from the supply/exhaust hose 37c to press the annular balloon body 22 tightly against the shoulder part IO in the converter where the permanent bricks tend to fall. do.

Furthermore, as shown in FIG. 8(c), after removing the wire 39 and suspending the annular balloon body 22 by the holding wire 45,
After loading the relining device 42 into the converter, the workbench 4
3, the worker 44 lays the refractory bricks of the hearth bottom refractory lining tab and the side wall linings 18c (wear bricks).

As shown in FIG. 8(d), when the refractory brickwork reaches the shoulder, the lower half of the annular balloon body 22, that is, the annular balloon body 22y in FIG. 7(a), is dismantled and removed from the converter l using a crane. to be carried out.

Thereafter, as shown in FIG. 8(e), when the refractory brickwork has progressed to the top of the converter I, the upper half of the annular balloon body 22, that is, the annular balloon body 22z, is deflated and reduced in size, and then transferred by a crane. Take it out of the furnace.

FIG. 8 (f>) shows the state in which the relining device 42 has been dismantled after the fireproof lining has been removed.

〔Effect of the invention〕

The method of the present invention can expand and contract freely, can be loaded into the furnace even through a narrow mouth, has the function of adhering to the target refractory lining wall and preventing it from falling off, and can be dismantled and carried in and out. It uses an annular balloon body and has high reliability in terms of safety.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams showing an overview of the method of the present invention, FIGS. 3 to 6 show the bonding method for forming the annular balloon body used in the present invention, and FIG. 7 is a diagram showing the method of the present invention. The annular balloon body is shown in detail, and FIG. 8 is a diagram showing a specific embodiment of the present invention. FIG. 9 and FIG. 1O are explanatory diagrams of the conventional method. l: Converter

Claims (1)

[Claims] 1. Connect an arbitrary number of cylindrical balloon bodies in parallel to form an expandable and contractible annular balloon body, contract the annular balloon body, insert it into the high temperature device through the opening of the high temperature device, and then introduce pressure medium into the high temperature device. A method for preventing a lining from falling off of a high-temperature equipment lining, the method comprising: feeding the annular balloon to expand it, and pressing the outer surface of the annular balloon against the lining surface of the high-temperature equipment.