JP2020056204A - Repairing device spraying on chimney inside wall surface - Google Patents

Abstract

To provide a repairing device spraying on a chimney inside wall surface capable of repairing the chimney inside wall surface by spraying spray-hardening material inside a chimney in a high temperature condition.SOLUTION: A repairing device in a chimney configured to spray spray-hardening material from a spray nozzle 13 attached on a rotatable part 12 to an inner wall surface 50a of the chimney 50 is provided with: an insulation container body 11 in which a dry type spray mechanism 20 is received; and the rotatable part 12 supportedly arranged on a bottom part 11a of the insulation container body 11, wherein the rotatable part 12 is provided in a cylindrical shape with a bottom concentrically positioned with the insulation container body 11 in which a nozzle drive mechanism 14 is provided and on which the spray nozzle part 13 is attached in a way to protrude from a side wall part 12a to the outside. An area or preferably a peripheral surface of the rotatable part 12 other than an area from which the spray nozzle part 13 is protruded is covered by an insulation layer 15 and/or a cooling layer 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wall surface spray repair device inside a chimney, and more particularly to a wall surface spray repair device inside a chimney in which a spray hardening material is sprayed from a spray nozzle toward an inner wall surface of the chimney.

  For example, incinerators installed at waste disposal sites, blast furnaces and coke ovens installed at various factories such as steel mills and smelters communicate with the chimney, and various facilities at these facilities and factories High-temperature exhaust gas, exhaust heat, and the like generated in the processing step are discharged to the atmosphere from a chimney. Therefore, since the inside of the chimney is exposed to high temperatures, if it is continuously used for a long period of time, for example, refractory bricks constituting the inner wall surface may be peeled off or cracks may be generated at joints, and deterioration proceeds. Will be. Therefore, it is necessary to investigate the state of deterioration of the inner wall surface of the chimney and repair the chimney if necessary.

  For this reason, a chimney interior investigating device has been developed in which the inside of the chimney is photographed by a video camera and the degradation state of the inner wall surface of the chimney can be inspected based on the image (for example, Patent Document 1). reference). In addition, to repair chimneys and the like, mortar spraying and mortar spraying can be performed easily and reliably at repair points where only a narrow working space can be secured, such as the inner wall surface of the chimney. An attaching method has also been developed (for example, see Patent Document 2).

  In addition, the survey device of Patent Document 1 suspends the operation of facilities and factories, cools the chimney sufficiently, and then suspends the video camera inside the chimney to take a picture. If it takes a long time to cool the stack, it will affect the operation of facilities and factories.Therefore, the inside of the chimney can be inspected in a hot state without stopping these operations for a long time. (See, for example, Patent Document 3).

  The diagnostic device inside the chimney of Patent Literature 3 is, for example, a chimney with a high temperature of about 150 ° C. or a chimney in use in which exhaust gas with a high temperature of about 150 ° C. is flowing, for example, in an incineration facility. The inside of the chimney can be inspected by cooling a TV camera or the like using dry ice. Also, for example, in steel mills and smelters, it is necessary to conduct internal investigations at a high temperature of about 200 ° C, for example, because the furnace is in communication with blast furnaces and coke ovens that may be damaged if the furnace is stopped for a long time. Various developments have been made so that a certain chimney can be inspected by exposing a measuring instrument such as a television camera to high temperatures.

JP-A-6-294243 Japanese Patent No. 4144804 JP 2010-236265 A

  On the other hand, when the deteriorated inner wall of the chimney is repaired by spraying it with a spray hardening material such as mortar or concrete, for example, a chimney provided in a steel mill or smelter and connected to a blast furnace or coke oven, etc. On the other hand, it is necessary to perform the spraying operation without stopping these furnaces for a long time, but the spraying nozzle and the mortar spraying method of Patent Document 2 are premised on construction at normal temperature. Therefore, it is not only difficult to work inside the chimney in a high temperature state, but also to perform the work by pumping the spray-hardened material from the ground to the inside of the chimney having a considerable height or providing a scaffold. It is difficult.

  In addition, when performing spraying work inside a chimney in a high temperature state, it is necessary to minimize the effects of high temperature on the spraying work, and to repair the inner wall surface of the chimney found at any location On the other hand, in order to be able to efficiently spray and cure the spray hardening material from the spray nozzle by remote control, it is necessary to stabilize the movement of the spray nozzle and improve operability. .

  The present invention, for example, without stopping the blast furnace or coke oven for a long time, inside the chimney in a high temperature state, while avoiding the effects of high temperature as much as possible, by remote control within a predetermined time, spray nozzle It is an object of the present invention to provide a wall surface spray repairing device inside a chimney capable of spraying a spray hardening material from a portion in a stable state to efficiently repair the inner wall surface of the chimney.

  The present invention provides a blown machine body, a water tank and a water pump, a compressed gas cylinder, a dry-type spraying mechanism including a battery, a bottomed cylindrical heat-insulated container body housed therein, and a bottom portion of the heat-insulated container body. A rotatable portion provided so as to be rotatable about the axial direction of the heat insulating container main body. A spray hardening material is supplied from a spray nozzle portion attached to the rotatable portion to a chimney. A wall spraying repairing device inside a chimney, which blows toward an inner wall surface of the chimney, wherein the rotating portion has a bottomed cylindrical shape arranged concentrically with the heat insulating container main body. A nozzle driving mechanism is provided, and a spraying nozzle portion is attached so as to protrude outward from the side wall portion, and the rotating portion rotates around a portion other than a portion where the spraying nozzle portion protrudes. Surface (outer surface or inner surface) By providing a wall spray repairing device inside the chimney covered by the heat insulating layer and / or cooling layer is obtained by achieving the above object.

  In the repair apparatus for spraying wall surface inside the chimney according to the present invention, it is preferable that the nozzle drive mechanism is a drive mechanism capable of circularly moving a tip end discharge port of the spray nozzle section.

  Further, in the wall surface spraying repair device for a chimney according to the present invention, it is preferable that the rotating portion has an outer diameter smaller than an outer diameter of the heat insulating container body.

  Further, the wall surface spray repair device inside the chimney of the present invention is fixed to the bottom of the heat insulating container main body, has an outer diameter similar to the outer diameter of the heat insulating container main body, and has a larger diameter than the outer diameter of the rotating portion. An annular imaging section having a large inner diameter is provided concentrically with the rotating section, and the annular imaging section has heat-resistant windows provided at a plurality of locations at intervals in the circumferential direction. The peripheral surface (outer peripheral surface or inner peripheral surface) of a portion other than the portion where the heat resistant window of the annular imaging unit is provided is covered with a heat insulating material. Is preferred.

  Still further, in the wall surface spraying repair device for the inside of the chimney according to the present invention, the turning portion may be provided integrally with the heat insulating container main body so as to protrude downward from a bottom portion of the heat insulating container main body. Preferably, it is rotatably connected to the lower end of the cylindrical projection having a diameter so as to be supported by the bottom of the heat insulating container main body.

  Further, in the wall surface spray repairing device inside the chimney according to the present invention, it is preferable that a plate-shaped cooling layer is provided along an inner peripheral surface of the heat insulating container body.

  According to the wall surface spraying repair device inside the chimney of the present invention, for example, without stopping the blast furnace or the coke oven for a long time, the inside of the chimney in a high temperature state can be determined while avoiding the influence of high temperature as much as possible. Within a short period of time, the spray hardening material can be sprayed from the spray nozzle portion in a stable state, and the inner wall surface of the chimney can be efficiently repaired.

1 is a schematic vertical sectional view illustrating a wall surface spray repair device inside a chimney according to a preferred embodiment of the present invention. It is a schematic longitudinal section explaining the use condition of the wall surface spray repair device inside the chimney concerning one preferred embodiment of the present invention. (A) is a schematic cross-sectional view along AA of FIG. 1, and (b) is a schematic cross-sectional view along -B of FIG. It is an important section schematic longitudinal section explaining the wall surface spray repair device inside the chimney concerning one preferred embodiment of the present invention. FIG. 5 is a partial schematic cross-sectional view taken along the line CC of FIG. 4. FIG. 9 is a partially broken side view schematically illustrating a state in which a rotating unit and an annular imaging unit are covered with a heat insulating layer and / or a cooling layer. FIG. 7 is a schematic cross-sectional view taken along a line DD in FIG. 6. FIG. 7 is a schematic cross-sectional view taken along a line EE in FIG.

  The wall surface spray repair device 10 according to a preferred embodiment of the present invention shown in FIGS. 1 to 5 is provided inside a chimney 50 provided in communication with a blast furnace or a coke oven, for example, in a steel mill or a smelter. However, by being used over a long period of time while being exposed to high temperatures, for example, when the refractory bricks 50b constituting the inner wall surface 50a are deteriorated due to peeling or cracks at joints, the deteriorated chimney 50 It is used as a device for repairing a spray hardening material such as mortar or concrete by spraying the inner wall surface 50a.

  Here, the chimney 50 discharges, for example, high-temperature exhaust gas of 200 ° C. or higher and exhaust heat sent from a blast furnace or a coke oven to the atmosphere from an upper end opening 50c (see FIG. 2). If used for a long time in a state where is exposed to a high temperature, the deterioration tends to proceed.

  On the other hand, the chimney 50 communicating with, for example, a blast furnace or a coke oven may be damaged if the blast furnace or the coke oven is stopped for a long time of, for example, 6 hours to 1, 2 days or more. Even if the 50 is not sufficiently cooled, it is necessary to inspect or repair the inside of the chimney 50 while keeping the temperature at a high temperature of, for example, about 200 ° C. The wall surface spray repair device 10 of the present embodiment can be used for a predetermined period of time without stopping the operation of the blast furnace or the coke oven for a long time even inside the chimney 50 in such a high temperature state. By repeatedly sending a suitable predetermined amount of the spray hardening material, compressed gas and electric power from the ground to the inside of the chimney 50, it is possible to spray the spray hardening material efficiently within a predetermined time, thereby enabling a high temperature condition. Inside the chimney 50, a function is provided to efficiently repair the inner wall surface 50a of the deteriorated chimney 50 while minimizing the effects of high temperature. In addition, the wall surface spray repair device 10 of the present embodiment improves the operability by stabilizing the operation of the spray nozzle unit 13 by remote control, and repairs the inner wall surface of the chimney 50 more efficiently. It has a function that allows you to do it.

  As shown in FIG. 1, the wall surface spray repair device 10 inside the chimney according to the present embodiment includes a spraying machine body 20a, a water tank and a water pump 20b, a compressed gas cylinder 20c, and a battery 20d. An attaching mechanism 20 is provided with a bottomed cylindrical heat-insulating container body 11 housed therein, and a turn provided on the bottom portion 11a of the heat-insulating container body 11 so as to be rotatable about the axial direction Z of the heat-insulating container body 11. Moving part 12, and a high-temperature chimney 50 in which a spray hardening material is blown from a spray nozzle part 13 attached to the rotating part 12 toward the inner wall surface 50 a of the chimney 50. Repair device suitable for internal use. The rotating portion 12 has a cylindrical shape with a bottom, which is arranged concentrically with the heat insulating container main body 11, has a nozzle driving mechanism 14 provided inside thereof, and blows out by protruding outward from the side wall portion 12 a. An attachment nozzle 13 is attached. In the rotating portion 12, the peripheral surface (outer peripheral surface or inner peripheral surface) of a portion other than the portion where the spray nozzle portion 13 protrudes is covered with the heat insulating layer 15 and / or the cooling layer 16. Although the wall surface spray repair device 10 of the present embodiment is intended for, for example, the chimney 50 in a high temperature state of, for example, about 50 to 200 ° C., the repair can be performed immediately after the blast furnace or the like is stopped. In consideration of the above, the inside of the chimney 50 in a high-temperature state, which is preferably about 250 ° C. at the maximum, can be repaired.

  In the present embodiment, the rotating portion 12 preferably has an outer diameter smaller than the outer diameter of the heat insulating container main body 11, and the rotating portion 12 preferably extends downward from the bottom 11 a of the heat insulating container main body 11. Is rotatably connected to the lower end of a cylindrical protrusion 17 having an outer diameter similar to the outer diameter of the rotating portion 12, which is integrally provided so as to protrude from the bottom 11 a of the heat insulating container main body 11. Supported.

  Furthermore, in the present embodiment, the annular shape is fixed to the bottom portion 11 a of the heat insulating container body 11, has an outer diameter similar to the outer diameter of the heat insulating container body 11, and has an inner diameter larger than the outer diameter of the rotating portion 12. An imaging unit 18 is provided concentrically with the rotating unit 12. The annular imaging unit 18 accommodates an imaging device 18b and an illuminating device 18c facing the heat-resistant windows 18a (FIG. 6) provided at a plurality of locations at intervals in the circumferential direction. The peripheral surface (outer peripheral surface or inner peripheral surface) of a portion other than the portion where the heat-resistant window 18 a of the imaging unit 18 is provided is covered with the heat insulating layer 15.

  In the present embodiment, as shown in FIGS. 1 and 3A and 3B, the size of the upper inner diameter of the heat-insulating container main body 11, which is generally adopted in, for example, steelworks and smelters, is 3.0 m. It is formed so as to have a hollow bottomed cylindrical shape having an outer diameter of about φ2.0 m, preferably a height of about 4 m, corresponding to the chimney 50 of about the size (see FIG. 2). have. Further, the heat insulating container body 11 is detachably connected and integrated with two steel unit container bodies 11 ′, 11 ′ having a height of about 2 m, which are vertically stacked using bolts and nuts. It has a two-stage structure. Inside these unit container bodies 11 ', 11', a spraying machine body 20a, a water tank and a water pump 20b, a compressed gas cylinder 20c, a battery 20d, and the like, which constitute the dry spraying mechanism 20, are housed. I have.

  That is, a plurality of compressed gas cylinders 20c are installed in the upper unit container main body 11 'in a state of being arranged vertically and horizontally, and the radio transmission device 20e is stored in the upper storage section partitioned by the partition plate 11b. ing. The lower unit container main body 11 'is provided with a remote control panel 20f in addition to the spraying machine main body 20a, the water tank and the water pump 20b, and the upper storage section partitioned by the partition plate 11b has a battery 20d. Is stored.

Here, the dry-type spraying mechanism 20 is configured to spray a hardened material in a fluidized state formed by adding water and kneading the cement and the aggregate to a spraying nozzle portion by a compressed gas to blow the sprayed hardened material. Unlike the wet-type spraying mechanism, the cement and the aggregate are kneaded in a state of being kneaded, and the compressed gas is fed to the spraying nozzle unit 13 and water is added and mixed immediately before the spraying nozzle unit 13. This provides a dry-type spraying mechanism for spraying a spraying hardening material in a fluidized state at a spraying location. The dry spraying mechanism 20 is used as the spraying hardening material spraying mechanism, and water is added immediately before the spraying nozzle section 13 to form a fluidized spraying hardening material. Thus, the spray hardening material is prevented from being easily hardened before spraying, and the spraying operation can be performed in a more stable state. In the present embodiment, as the spraying machine main body 20a of the dry spraying mechanism 20, more specifically, for example, a model name "Aliba 237V" (Fuji Bussan Co., Ltd.) having a spraying capacity of about 0.5 m ³ / h. And the like can be preferably used.

  In the present embodiment, for example, nitrogen gas or the like, which is an inert gas, can be preferably used as the compressed gas contained in the compressed gas cylinder 20c for pumping the spray hardening material. By using an inert gas such as nitrogen gas as a compressed gas for pumping the spray hardening material, the spraying operation can be safely performed even in the chimney 50 in a high temperature state.

  Further, in the present embodiment, as shown in FIGS. 1 and 3A and 3B, rails provided along the inner peripheral surface of the upper end portion inside each unit container main body 11 '. A plurality of thick plate-shaped cooling layers 21 are provided along the inner peripheral surface so as to be slidable in the circumferential direction so as to be suspended from the member 22 (see FIG. 1). A pair of hinged doors 23 is provided on the side surface of the unit container body 11 'in such a manner as to be openable and closable in a double door manner.

  Furthermore, in the present embodiment, preferably the entire outer peripheral surfaces of the two unit container main bodies 11 ′ and 11 ′ constituting the heat insulating container main body 11 are covered by the heat insulating layer 15 including the part of the set of hinged doors 23. Covered. As the heat insulating layer 15, for example, a layer obtained by laminating a high-temperature heat insulating wool, a glass cloth, and a high-performance heat insulating material can be preferably used. More specifically, for example, as a high-temperature insulating wool, a brand name “Fine Blanket” (manufactured by Nichias Co., Ltd.) having a thickness of 25 mm, which is a blanket insulating material made of alkali earth silicate wool, and a glass having a thickness of 50 mm A heat insulating material formed by laminating a cloth and “Microtherm” (trade name, manufactured by Promat Japan KK) having a thickness of 5 mm as a high-performance heat insulating material can be used as the heat insulating layer 15. . The heat insulating layer 15 is formed, for example, such that the outer peripheral surfaces of the unit container bodies 11 ′, 11 ′ are vertically and horizontally divided into a plurality of regions, and each of the frames is formed by a partition frame 11 c protruding from the outer peripheral surface. By arranging it so that it fits snugly, and by threading a male screw rod provided in each frame, for example, by stud welding, etc. The unit container main bodies 11 ', 11' can be easily attached by covering the outer peripheral surfaces thereof.

  Further, in the present embodiment, the heat insulating layer 15 attached so as to preferably cover the outer peripheral surfaces of the two unit container main bodies 11 ′ and 11 ′ constituting the heat insulating container main body 11 has a water-repellent outer peripheral surface. It is preferable that the heat-insulating layer 15 is not provided with water repellency. If the heat-insulating layer 15 does not have water repellency, a waterproof layer made of a heat-resistant waterproof sheet is attached so as to further cover the outer peripheral surface of the heat-insulating layer 15. It is preferable to keep it. Due to these, for example, when the heat insulating layer 15 absorbs rainwater during rainy weather and the weight increases, the weight of the wall surface spray repair device 10 becomes excessively heavy, and a hanging operation or lifting by a crane or the like installed at the beginning of the work. The difficulty in operation can be effectively avoided.

  Further, in the present embodiment, the upper end surface of the upper unit container main body 11 ′ is closed by a heat insulating lid member 19 in which a heat insulating material having the same layer configuration as the above-described heat insulating layer 15 is provided. It is preferable to provide, for example, a small fan (not shown) or the like that generates an air current for equalizing the temperature inside the two unit container bodies 11 ′, 11 ′.

  In the present embodiment, as shown in FIG. 1, the rotating portion 12 rotatably supported on the bottom 11 a of the heat insulating container body 11 preferably has an outer diameter smaller than the outer diameter of the heat insulating container body 11. The rotating portion 12 is preferably rotatably connected to a lower end portion of a cylindrical protrusion 17 integrally provided so as to protrude downward from the bottom portion 11a of the heat insulating container body 11 so as to be thermally insulated. It is supported on the bottom 11 a of the container body 11.

  That is, in the present embodiment, as shown in FIG. 4, the rotating part 12 and the cylindrical protrusion 17 are formed so as to have a hollow cylindrical shape having an outer diameter of about 1200 mm. The protrusion 17 is a steel part having a height of, for example, about 350 mm. The cylindrical projecting portion 17 joins an annularly extending joining flange 17a integrally attached to the upper end portion to the bottom plate 11d of the lower unit container main body 11 'constituting the bottom 11a of the heat insulating container main body 11. By doing so, it is arranged concentrically with the heat insulating container body 11 and is integrally fixed to the heat insulating container body 11. The inside of the cylindrical protrusion 17 is supported by a support bracket (not shown) extending from the inner peripheral surface toward the center in the radial direction and fixed to the inside. The rotating unit turning motor 31 is mounted on a projection bracket 34 that is fixed by projecting inward from the inner peripheral surface. The rotary joint 30 and the rotating portion turning motor 31 are provided in a state of extending downward to a region inside the rotating portion 12. A sprocket 31a, which constitutes a pin gear drive unit together with a roller chain 31b provided in the rotating part 12, is rotatably attached to the lower end of the rotating part rotating motor 31 by driving the rotating part rotating motor 31. ing.

  In addition, the lower end of the cylindrical projection 17 projects inwardly in an annular shape, and is integrally joined with a rotating portion support flange 17e. A known cam follower 33 is attached to the lower surface side of the rotating portion support flange 17e, and the rotating portion 12 is rotatably suspended via the cam follower 33, so that the rotating portion 12 is It is rotatably connected while being supported from the bottom 11a of the heat insulating container body 11. The upper end of the rotating portion 12 is in close contact with the lower surface of the outer peripheral edge portion of the rotating portion support flange 17e of the cylindrical projection 17 via a lip seal 12d so as to be slidable in the circumferential direction.

  In the present embodiment, the rotating portion 12 is a steel portion having a height of, for example, about 1100 mm, and is attached to the rotating portion support flange 17e at the lower end of the cylindrical protrusion 17 as described above. It is rotatably suspended from the cylindrical protruding portion 17 via the provided cam follower 33. A lower half portion of a rotary joint 30 provided at a central portion of the cylindrical projection 17 faces the upper portion of the hollow interior of the rotating portion 12, and a lower end portion of the rotary joint 30 is It is connected in a fixed state to the upper end of a support tube 12c arranged upright from the central portion of the bottom portion 12b of the portion 12.

  The rotary joint 30 is a joint member known as a unit for transporting a medium from a fixed portion to a rotating portion in various machines and devices. In this embodiment, the rotary joint 30 can rotate and slide the lower half portion 30c relative to the upper half portion 30b via the double flange portion 30a which is slidably adhered in the rotation direction. I have. One end of the upper half portion 30b of the rotary joint 30 is connected to the spraying machine main body 20a of the dry spraying mechanism 20 housed in the lower unit container main body 11 'and the bottom of the lower unit container main body 11'. The other ends of the powder pipe 20g and the mixed water pipe 20h, which are inserted into the through holes 11e formed in the center portion of the face plate 11d and extend inside the cylindrical projection 17, are connected. A powder pipe 20 g is connected to the center of the rotary joint 30, and a mixed water pipe 20 h is connected to the eccentric side of the rotary joint 30. One end of a nozzle-side powder pipe 20i and one end of a nozzle-side mixed water pipe 20j are connected to the lower half portion 30c of the rotary joint 30, and these nozzle-side powder pipe 20i and the nozzle-side mixed water The other end of the pipe 20j is connected to a spray nozzle portion 13 provided in the rotating portion 12 through the hollow interior of a support tube 12c standing upright from the bottom portion 12b of the rotating portion 12.

  In addition, the lower half portion 30c of the rotary joint 30 is contacted by a known rotary ring portion 32a and a brush portion 32b, which are well-known components serving as lead wires when power is supplied from the fixed side to the rotating side. A contact type slip ring 32 is provided. That is, the slip ring 32 is provided so as to extend from the rotating ring portion 32a provided on the outer peripheral portion of the lower half portion 30c which is the rotating side of the rotary joint 30 and the upper half portion 30b which is the fixed side of the rotary joint 30. And a brush portion 32b. Wirings (not shown) inserted from above into the above-described through holes 11e formed in the central portion of the bottom plate 11d of the lower unit container body 11 'are connected to the brush portion 32b and the rotating portion. By connecting wires (not shown) extending from the nozzle drive mechanism 14 provided to the rotary unit 32 to the rotating ring 32a, a power source (from a battery 20d stored in the lower unit container body 11 ') is connected. Power) can be supplied to the nozzle drive mechanism 14 provided in the rotating part 12 via the rotary joint 30.

  In the present embodiment, as described above, the rotating portion 12 is rotatably suspended via the cam follower 33 from the rotating portion support flange 17e joined to the lower end portion of the cylindrical protrusion 17 and has a hollow shape. It is a steel part having a cylindrical shape at the bottom. The bottom part 12b of the rotating part 12 has a double structure, and the cooling layer 16 is formed by filling the inside with, for example, dry ice. In addition, a support tube 12c is provided so as to be vertically erected from the center of the bottom portion 12b. As described above, the lower half 30c of the rotary joint 30 is fixed to the upper end of the support tube 12c, and the rotary joint 30 is supported by the support tube 12c from below.

  Further, the rotating part 12 is disposed at the same height position as the sprocket 31 a which is rotated by the driving of the rotating part rotating motor 31 attached to the cylindrical projection 17, and the rotating part 12 A chain support flange 12e, which is provided so as to protrude inward from the inner surface in an annular shape, is joined as a single body. A roller chain 31b, which constitutes a pin gear drive unit together with a sprocket 31a attached to the rotating section turning motor 31, is attached to the inner end face of the chain support flange 12e so as to be annularly continuous over the entire circumference thereof. ing. Thus, by rotating the sprocket 31a by driving the rotation unit turning motor 31, the rotation unit 12 can be rotationally moved in the circumferential direction with respect to the cylindrical protrusion 17 via the roller chain 31b. I can do it.

  In the present embodiment, the rotating unit 12 is provided with a nozzle driving mechanism 14 that can change the spray direction of the spray nozzle unit 13 up, down, left, and right. In the present embodiment, the nozzle drive mechanism 14 is a drive mechanism capable of circularly moving the tip discharge port 13a of the spray nozzle section 13. That is, as shown in FIGS. 4 and 5, the nozzle drive mechanism 14 holds the spray nozzle 13 at a portion close to the side wall 12 a of the rotating portion 12, and is positioned on the rotation center axis by the nozzle drive mechanism 14. The arranged first spherical bush 14a and the second eccentrically arranged from the rotation center axis by the nozzle driving mechanism 14 that grips the spray nozzle portion 13 at a portion closer to the center than the side wall portion 12a of the rotating portion 12. A spherical bush 14b, and by rotating the second spherical bush 14b in an eccentric state by a nozzle rotating motor 14c, the tip discharge port 13a of the spray nozzle portion 13 is rotated at a predetermined rotational speed. You can exercise. By spraying the spray hardening material toward the inner wall surface 50a of the chimney 50 while making the tip discharge port 13a of the spray nozzle portion 13 circularly move, spraying is performed while the spraying range is not a point but a surface. Becomes possible. In addition, the tip nozzle orifice 13a of the spray nozzle portion 13 is moved in a circular motion, and the rotating portion 12 is sprayed while rotating in the horizontal direction (circumferential direction). It is possible to reproduce the movement of the distal end discharge port 13a of the section 13, and it is possible to perform spraying with a good finish.

  Further, in this embodiment, as schematically shown in FIGS. 1 and 4, a steel material having an outer diameter similar to the outer diameter of the heat insulating container main body 11 and having an inner diameter larger than the outer diameter of the rotating portion 12 is used. Is fixed to the bottom portion 11a of the heat insulating container body 11 and provided concentrically with the rotating portion 12. As shown in FIGS. 6 and 7, the annular imaging unit 18 faces the heat-resistant windows 18a provided at a plurality of locations (six locations in the present embodiment) at equal intervals in the circumferential direction. , An imaging device 18b and a lighting device 18c (see FIG. 6). That is, a storage booth 18d is provided behind the heat-resistant window 18a, in which a lighting device 18c having heat resistance is stored, and a radially inner side of the annular imaging unit 18 from above the storage booth 18d. An additional booth 18e is provided, and an imaging device 18b, which is preferably a heat-resistant WEB camera, is attached to the additional booth 18e with the imaging unit facing obliquely downward.

  Further, in the present embodiment, preferably, the outer peripheral surface of a portion other than the portion where the heat-resistant window 18 a of the annular imaging unit 18 is provided is covered with the heat insulating layer 15. The heat insulating layer 15 is, for example, a laminate of a high-temperature heat-insulating wool, a glass cloth, and a high-performance heat insulating material, like the heat insulating layer 15 that covers the entire outer peripheral surfaces of the two unit container bodies 11 ′, 11 ′. It can be preferably used, and can be arranged so as to fit exactly in the frame formed by the partition frame, and can be easily attached to the peripheral surface of the annular imaging unit 18 using a male screw rod, a nut member, or the like. Further, in the present embodiment, at the upper end portion of the annular imaging section 18, six dry ice cases 18f are provided between the pair of adjacent storage booths 18d. In these dry ice cases 18f, dry ice is stored, so that the function of a cooling unit can be exhibited. By providing the dry ice case 18f containing dry ice in the annular imaging unit 18, it is possible to more effectively prevent the imaging device 18b and the lighting device 18c from becoming excessively hot. become.

  In the present embodiment, the rotating portion 12 rotatably suspended from the lower end portion of the cylindrical projecting portion 17 has a portion other than the portion where the blowing nozzle portion 13 is projected, as shown in FIGS. Preferably, the outer peripheral surface of the part is covered by a heat insulating layer 15 and / or a cooling layer 16. That is, in the present embodiment, the upper part of the rotating part 12 that overlaps with the lower part of the annular imaging part 18 fixed to the bottom 11 a of the container body 11 has an inner diameter of the rotating imaging part 18 of the rotating part 12. By being larger than the outer diameter, the peripheral surface is covered with the heat insulating layer 15 of the annular imaging unit 18 in a rotatable state (see FIGS. 4 and 6). Further, the lower part of the rotating part 12 is sandwiched by a band-shaped height area of an intermediate part below the annular imaging part 18 where the blowing nozzle part 13 protrudes, and includes a bottom surface part 40a and a peripheral wall part 40b. Preferably, the peripheral surface is covered with the heat insulating layer 15 of the base hakama 40 by being disposed inside the base hakama 40 having the heat insulating layer 15 attached to the outer peripheral surface.

  The base hakama 40 is a bottomed cylindrical steel portion having an outer diameter similar to that of the container main body 11 formed by the two unit container main bodies 11 'and 11', and includes a bottom portion 40a and a peripheral wall portion 40b. Preferably, the entire outer peripheral surface is covered with the heat insulating layer 15. The heat insulating layer 15 is, for example, a laminate of a high-temperature heat-insulating wool, a glass cloth, and a high-performance heat insulating material, like the heat insulating layer 15 that covers the entire outer peripheral surfaces of the two unit container bodies 11 ′, 11 ′. It can be preferably used, and can be arranged so as to fit into the frame formed by the partition frame, and can be easily attached to the entire outer peripheral surface of the base hakama 40 using a male screw rod, a nut member or the like. The base hakama 40 is formed, for example, by joining a bottom surface 40a to a lower surface of a double-layered bottom portion 12b of the rotating portion 12 forming the cooling layer 16 made of dry ice via bolts and nuts or the like ( 4), it is attached to the rotating part 12 so that it can rotate integrally with the rotating part 12.

  Further, in the present embodiment, a belt-shaped height region in the middle portion of the rotating portion 12 between the lower end portion of the annular imaging portion 18 and the upper end portion of the base hakama 40 where the spray nozzle portion 13 protrudes. As shown in FIGS. 6 and 8, a substantially annular ring-shaped intermediate heat insulating member is mounted so as to be fitted between the lower end of the annular imaging section 18 and the upper end of the base skirt 40. 41 will be covered. The intermediate heat insulating member 41 has a substantially cylindrical outer shell steel plate 41a having an outer diameter similar to that of the container main body 11 with a portion corresponding to the spray nozzle portion 13 cut out, and preferably an inner shell steel plate 41a. A heat insulating layer 15 having the same layer structure as the heat insulating layer 15 of the annular imaging unit 18 and the base hakama 40 attached along the peripheral surface, and is preferably configured to include the annular imaging unit 18 and the base hakama 40. And the same height as the width of the gap in the height direction.

  The intermediate heat insulating member 41 is attached to a portion between the lower end of the annular imaging unit 18 and the upper end of the base hakama 40, and is joined to the upper end of the base hakama 40, so that Since it is integrally mounted and is not joined to the annular imaging unit 18, it can rotate together with the base hakama 40 with the rotation of the rotating unit 12. In the cut-out portion of the intermediate heat insulating member 41, a pair of partition plates 42 are disposed on both sides of the spray nozzle portion 13 projecting from the side wall portion 12a of the rotating portion 12, and a pair of partition plates 42 are provided. It is attached so as to partition a hollow part between the heat insulating member 41 and the rotating part 12. Thus, a movable heat insulating section 43 is formed which enables the blowing nozzle unit 13 to move up, down, left, and right while maintaining the heat insulating state around the blowing nozzle unit 13. The movable heat-insulating section 43 is provided with a movable heat-insulating section so as to allow the nozzle drive mechanism 14 of the movable heat-insulating section 43 to move up, down, left, and right by the nozzle drive mechanism 14 while maintaining the heat insulating function of the intermediate heat insulating member 41. A flexible heat-resistant sheet 44 is attached so as to cover the outer peripheral surface of the opening 43 and has a peripheral portion fixed to the peripheral portion of the movable heat insulating section 43. The heat-resistant sheet 44 has an area larger than the opening area of the outer peripheral surface of the movable heat-insulating section 43, and is attached inside the movable heat-insulating section 43 in a loose state. The heat-resistant sheet 44 has an opening at the tip end of the spray nozzle 13 at the center. With these, the spray nozzle portion 13 protruding from the rotating portion 12 is moved up, down, left, and right by driving the nozzle drive mechanism 14 inside the hollow of the movable heat insulating section 43, and the leading end discharge port opened at the central portion of the heat resistant sheet 44. 13a is preferably moved in a circular motion, so that the spray hardening material can be smoothly and stably discharged toward the repair portion 52 in a stable state. By being covered, it is possible to easily maintain a state where the inside of the movable heat insulating section 43 is insulated.

  Therefore, in the present embodiment, the rotating portion 12 covers the peripheral surface (outer peripheral surface or inner peripheral surface) of the portion other than the portion where the spray nozzle portion 13 protrudes with the heat insulating layer 15 and / or the cooling layer 16. At the same time, preferably, the periphery of the portion where the spray nozzle portion 13 protrudes is also covered with the heat-resistant sheet 44.

  Thus, in the present embodiment, the rotating portion 12 is preferably covered with the heat insulating layer 15 and / or the cooling layer 16 on the peripheral surface of the portion other than the portion where the spray nozzle portion 13 protrudes. The periphery of the portion where the spray nozzle portion 13 protrudes is also covered with the heat-resistant sheet 44.

  In the chimney inner wall surface spraying repair device 10 of the present embodiment having the above-described configuration, for example, in a work yard on the ground outside the chimney 50 and outside the chimney 50, the pair of unit container bodies 11 ′ and 11 ′ are With a set of hinged doors 23 opened, a predetermined amount of cement or aggregate for kneading suitable for performing a spraying operation for a predetermined time, for example, about one hour, is supplied to the hopper of the spraying machine main body 20a. And a predetermined amount of water is supplied to the water tank and the water pump 20b. In addition, a predetermined amount of compression necessary for spraying a predetermined amount of the spray hardening material formed by the supplied predetermined amount of cement, aggregate, water, or the like from the spray nozzle portion 13 to the inner wall surface 50a of the chimney 50. The gas is supplied by loading the required number of compressed gas cylinders 20c. Further, while spraying a predetermined amount of the spray hardening material onto the inner wall surface 50a of the chimney 50, a predetermined amount of electric power necessary for operating various devices and devices is supplied by storing the electric power in the battery 20d. Further, a predetermined amount of dry ice is supplied to the double bottom plate 12b of the rotating part 12 and the plate-shaped cooling layer 21 provided along the inner peripheral surface of each unit container body 11 '. Inspect and maintain various equipment and devices.

  Here, the plate-shaped cooling layer 21 (see FIGS. 1, 3 (a) and 3 (b)) provided along the inner peripheral surface of each unit container body 11 'is, for example, a rectangular parallelepiped cooling basket. Is formed by storing dry ice in the form of a thick plate formed to have a vertically-long rectangular shape of a desired size, and a cooling basket is provided on the upper inner peripheral surface of each unit container body 11 ′. The plate-shaped cooling layer 21 is guided by the rail member 22 and suspended along the inner peripheral surface of the unit container main body 11 ′ by being suspended from the rail member 22 arranged in an annular shape along the periphery. It can be slid in any direction. Thereby, each of the plurality of plate-shaped cooling layers 21 is slid from the carry-in port 45 opened and closed by the hinged door 23 to the depth side of the unit container body 11 ′ via the rail member 22, preferably in the circumferential direction. It can be easily installed at predetermined positions arranged at equal intervals.

  Further, in the present embodiment, a pair of opening doors 23 provided on the side surface of each unit container main body 11 ′ are opened in a double-opening manner to form a carry-in entrance 45 (see FIGS. 3A and 3A). b)), a sprayer main body 20a, a water tank and a water pump 20b, a compressed gas cylinder 20c, a battery 20d, a wireless transmission device 20e, a remote control panel 20f, a small electric fan (not shown), and the like are installed. It is possible to perform operations such as storing and supplying cement, aggregate, water, compressed gas, electric power, and dry ice. The set of hinged doors 23 is a portion having the same height as the height of each unit container main body 11 ′ and having an arc-shaped flat cross-sectional shape. Are rotatably connected to end edges on both sides of a portion to be connected via a hinge connecting portion 23a. The pair of hinged doors 23 are each opened to the outside around the hinge connection portion 23a to form a carry-in port 45 having a large area over the entire height of the unit container body 11 ', and the unit container body 11' Various operations to the inside can be efficiently performed from a position closer to the ground, and in a state where the inside is rotated and the carry-in port 45 is closed, the distal end portions opposite to the hinge connecting portion 23a are locked with each other. Thus, the carry-in port 45 can be firmly closed in a sealed state.

  In the work yard on the ground, when the operation of supplying cement, aggregate, water, and the like to the pair of unit container bodies 11 'and 11' and other operations are completed, the entrance 45 is closed, and the pair of unit containers 11 'and 11' is closed. The entire wall spraying repair device 10 inside the chimney of this embodiment, including the unit container bodies 11 ', 11', is suspended from the lifting hooks 38 of the lifting heavy machine (see FIG. 1). Thereafter, as shown in FIG. 2, the wall surface spraying repair device 10 is suspended inside the chimney 50 in a high temperature state by the lifting heavy machine, and the spraying operation toward the inner wall surface 50a is performed while being lifted up and down. For a predetermined time. The spraying operation inside the chimney 50 is performed by a remote operation from the ground via the wireless transmission device 20e and the remote control panel 20f, etc., while viewing an image captured by the imaging device 18b composed of a WEB camera on the screen. This can be easily performed by driving and controlling the moving part turning motor 31, the sprayer main body 20a, the water tank and the water pump 20b, the nozzle drive mechanism 14, and the like.

  Here, in the present embodiment, as shown in FIG. 1, a hanging member 36 is joined to an upper end portion of the container main body 11 constituting the wall surface spray repair device 10 by a joining method by welding or the like. The hanging bracket 36 includes, for example, a support frame portion 36a made of, for example, an H-shaped steel, and preferably having a cross shape in a plan view, and connection support portions 36b attached to four corners of the support frame portion 36a, and via the connection support portion 36b. The hook locking wire 37 is attached to the upper end of the container body 11 and connected to the four ends of the support frame 36a. This hook locking wire 37 locks a lifting hook 38 at the lower end of a lifting wire 39 suspended from the end of a boom of a heavy lifting machine (not shown) such as a crawler crane. The wall-surface spraying repair device 10 in the form can be lifted by a lifting heavy machine and can be raised and lowered inside the chimney 50 or can be dropped outside the chimney 50 (see FIG. 2).

  Further, in the present embodiment, a raising pole 36c is provided upright from the support frame portion 36a of the hanging member 36. An antenna for wirelessly transmitting / receiving a video image captured by the imaging device 18b to a monitor or a recording device provided on the ground so as not to interfere with the hook locking wire 37 is provided on the upper end flange portion 36d of the raising pole 36c. , Mounted in raised condition. As a result, it is possible to effectively avoid intermittent interruption or disruption of video radio transmitted and received between the imaging device 18b and the monitor or the recording device.

  When the spraying operation for a predetermined time is completed, the wall surface spray repair device 10 is pulled up from the inside of the chimney 50 and suspended outside the chimney 50, and in the work yard on the ground, cement, aggregate, water, etc. It is possible to quickly perform operations such as supplying compressed gas, electric power, dry ice, and the like, and operations such as inspection and maintenance without taking much time. After the work of supplying cement, aggregate, water, compressed gas, electric power, dry ice, etc., and the work of inspection and maintenance, etc., are finished, the wall spraying repair device 10 is again moved to the high temperature state of the chimney 50 as described above. The spray hardening material can be sprayed for a predetermined period of time while being suspended inside. The same process is repeatedly performed within a predetermined time period during which the operation of the blast furnace, the coke oven, and the like can be stopped, so that the spray hardening material is efficiently sprayed, and the chimney 50 deteriorated by high temperature is discharged. The inner wall surface 50a can be effectively repaired.

  Thus, according to the wall surface spraying repair device 10 inside the chimney of the present embodiment, the mortar can be ground to the inside of the chimney 50 having a considerable height without stopping the blast furnace or the coke oven for a long time. Without pumping from, or working with a scaffold 50 having a considerable height provided with a scaffold, inside the chimney 50 in a high temperature state, efficiently spraying a hardening material within a predetermined time, The inner wall surface 50a of the chimney 50 can be effectively repaired.

  Further, according to the wall surface spraying repair device 10 inside the chimney of the present embodiment, the nozzle driving mechanism is supported on the bottom portion 11a of the heat insulating container body 11 so as to be rotatable around the axial direction Z of the heat insulating container body 11. 14 is provided with a bottomed cylindrical rotating part 12, and is blown by a dry spraying mechanism 20 from a blowing nozzle part 13 which is attached by protruding outward from a side wall part 12 a of the rotating part 12. The spray hardening material is sprayed toward the inner wall surface 50a of the chimney 50, and the rotating portion 12 has a circumferential surface (outer circumferential surface or inner circumferential surface) other than a portion where the spray nozzle portion 13 protrudes. Are covered by the heat insulating layer 15 and / or the cooling layer 16. Accordingly, inside the chimney 50 in a high temperature state, while avoiding the influence of high temperature as much as possible, the rotation of the rotation section 12 in the circumferential direction and the discharge of the tip discharge port 13 a of the spray nozzle section 13 by the nozzle driving mechanism 14 are performed. It is possible to easily and precisely control the movement of the upper, lower, left and right circular motions by remote control, and to stabilize the spray hardening material from the spray nozzle portion 13 at a predetermined repair point on the inner wall surface 50a of the chimney 50. It is possible to efficiently repair the inner wall surface 50a of the chimney 50 by spraying in a state where it is blown.

  Therefore, according to the wall surface spray repair device 10 inside the chimney of the present embodiment, the influence of the high temperature can be avoided as much as possible inside the chimney 50 in the high temperature state without stopping the blast furnace or the coke oven for a long time. In addition, it is possible to repair the inner wall surface of the chimney 50 efficiently by spraying the spray hardening material from the spray nozzle portion 13 in a stable state by remote control within a predetermined time.

  Note that the present invention is not limited to the above embodiment, and various changes can be made. For example, the nozzle drive mechanism does not necessarily need to be a drive mechanism capable of circularly moving the tip discharge port of the spray nozzle unit, but may be any mechanism that can move the tip discharge port up, down, left, and right. The rotating portion does not necessarily have to have an outer diameter smaller than the outer diameter of the heat insulating container main body, and has the same outer diameter as the outer diameter of the heat insulating container main body, without passing through the cylindrical protrusion. It may be rotatably connected directly to the bottom of the heat insulating container body.

DESCRIPTION OF SYMBOLS 10 Wall spraying repair apparatus inside a chimney 11 Insulated container main body 11 'Unit container main body 11a Bottom 12 Rotating part 12a Side wall 12b Bottom base 12c Support tube 12d Lip seal 12e Chain support flange 13 Spray nozzle 13a Tip discharge port 14 Nozzle drive mechanism 14a First spherical bush 14b Second spherical bush 15 Heat insulation layer 16 Cooling layer 17 Cylindrical projection 17a Joining flange 17e Rotating part support flange 18 Annular imaging unit 18a Heat resistant window 18b Imaging device 18c Illumination device 19 Thermal insulation lid Member 20 Dry spray mechanism 20a Sprayer body 20b Water tank and water pump 20c Compressed gas cylinder 20d Battery 20e Wireless transmission device 20f Remote control panel 21 Plate cooling layer 22 Rail member 23 Door 30 Rotary joint 31 Rotating part rotating motor 31a Sprocket 3 b Roller chain 32 Slip ring 36 Suspension fitting 37 Hook locking wire 38 Lifting hook 39 Elevating wire 40 Base hakama 41 Intermediate heat insulating member 42 Partition plate 43 Movable heat insulating section 44 Heat resistant sheet 45 Carry-in 50 Chimney 50a Inner wall 50b Fire-resistant brick 50c Upper end opening Z Axial direction of heat insulation container body

Claims (6)

A bottomed cylindrical insulated container main body in which a dry spraying mechanism including a spraying machine main body, a water tank and a water pump, a compressed gas cylinder, and a battery is housed; A rotating portion provided rotatably supported about the axial direction of the main body.From the spray nozzle portion attached to the rotating portion, a spray hardening material is applied to the inner wall surface of the chimney. It is a wall spraying repair device inside the chimney that is blown toward
The rotating portion has a cylindrical shape with a bottom, which is arranged concentrically with the heat insulating container main body, has a nozzle driving mechanism inside, and projects outward from a side wall portion to form a spray nozzle. Part is attached,
The spraying device for a wall surface inside a chimney in which a peripheral surface of a portion other than a portion where the spray nozzle portion protrudes is covered with a heat insulating layer and / or a cooling layer.   2. The apparatus according to claim 1, wherein the nozzle drive mechanism is a drive mechanism capable of circularly moving a tip end outlet of the spray nozzle unit. 3.   3. The apparatus according to claim 1, wherein the rotating portion has an outer diameter smaller than an outer diameter of the heat insulating container body. 4.   An annular imaging unit fixed to the bottom of the heat insulating container body, having an outer diameter similar to the outer diameter of the heat insulating container body, and having an inner diameter larger than the outer diameter of the rotating unit, The annular imaging unit is provided with an imaging device and a lighting device facing the heat-resistant windows provided at a plurality of locations at intervals in the circumferential direction. 4. The apparatus according to claim 3, wherein a peripheral surface of a portion other than a portion where the heat-resistant window of the annular imaging unit is provided is covered with a heat insulating layer.   The rotating portion is rotatably connected to a lower end portion of a cylindrical protrusion having an outer diameter similar to the outer diameter of the rotating portion, which is integrally provided so as to protrude downward from the bottom of the heat insulating container body. 5. The apparatus according to claim 3, wherein the apparatus is supported on the bottom of the heat insulating container main body.   The wall surface spraying repair device according to any one of claims 1 to 5, wherein a plate-shaped cooling layer is provided along an inner peripheral surface of the heat insulating container body.

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