JPH02280862A - Thermal spraying repairing apparatus of coke oven - Google Patents

Abstract

PURPOSE:To prevent the damage of a boom and a rack by matching the horizontal slot formed to the rack mounting metal fitting fixed to a boom with the horizontal slot formed to the rack to clamp said fitting and the rack by a bolt to mount the rack to the upper surface of the boom. CONSTITUTION:The center rack 2a at the position relatively low in a temp. change near to the center part of a boom 1 in the longitudinal direction thereof is fixed to the upper surface of the boom 1. The individual split racks 2b adjacent to the rack 2a are connected by butt straps 22 and bolts 21 on both sides to be fixed while the horizontal slot 24 formed to the rack mounting metal fitting 23 fixed to the boom 1 is matched with the horizontal slot 24 formed to the rack 2b to clamp said fitting 23 and the rack 2b by a bolt 21 to mount the rack 2b to the upper surface of the boom 1. As a result, long-time thermal spraying repairing work can be performed without damaging the boom and the rack.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) This invention relates to a thermal spray repair device for a coke oven.

(Prior art) As a furnace for producing metallurgical coke, a chamber furnace for producing coke is capable of mass production, is easy to carry out quality control, and is relatively effective in using a huge amount of heat. It has been widely adopted because it is widely used.

However, since coal carbonization is indirect heating through the side walls of brickwork, long-term use may cause coke to fuse with the bricks, collapse of the brickwork side walls, or damage the side walls when taken out of the kiln. Therefore, the life of a normal reactor is said to be about 20 years.

Since reloading bricks in a coke oven requires a huge amount of money and time, many proposals have been made for hot repair methods for coke ovens, and they are being put into practical use, albeit on a small scale.

For example, a thermal spray burner is provided at one end of a water-cooled long cylinder into which a supply pipe for combustible gas, oxygen, and refractory powder is inserted, and an operating handle is provided at the other end, so that the aforementioned water-cooled long cylinder can be freely moved to a support frame. Utility Model No. 5236703, which is mounted on a movable trolley so that it can tilt and rotate freely, and a repair burner is detachably attached to a coke guide car or pusher car.
JP-A-53-82802, a cassette-type thermal spraying repair machine with a burner that can be moved forward and backward, rotated, and tilted freely, 1 on a trolley
Utility Model No. 5386455, which is characterized by having a powder spray nozzle on one side that can move up and down, and a heat source gas cylinder, powder hopper, etc. on the other side, and a thermal spray burner mounted on a trolley so that it can move up and down and back and forth. Also known is Utility Model Laid-Open No. 61-159345, in which the thermal spray burner is suspended and supported by a chino via a hoisting machine from a coal charging hole at the top of the furnace.

(Problems to be Solved by the Invention) As mentioned above, the hot repair equipment for the coke oven carbonization chamber that has been implemented in the past has been repaired manually by the operator while visually checking the area within 1 to 2 m from the kiln mouth. In most cases, the boom is inserted into the center of the furnace, and a device that repairs a wide area accurately and efficiently after confirming the location to be repaired, especially an efficient forward and backward movement mechanism for the boom. has not yet been developed.

The applicant of this patent has disclosed in Japanese Patent Application No. 63-251972 that when a long boom is used and the driving part of the thermal spray repair equipment is set on the middle work floor of a coke oven, all walls up to the center of the coking chamber can be We are applying for a repairable device.

However, the above-mentioned earlier patent application filed in 1983-2197 by the present patent applicant
For the first time in No. 2, it became possible to perform thermal spray repair to the center of the carbonization chamber, but it was discovered that the long boom inserted into the furnace had a considerable effect on heat.

The present invention was created as an improvement of Japanese Patent Application No. 63-251972, and is particularly aimed at improving the attachment mechanism of the boom delivery rank to prevent breakage of the boom and rank. .

"Structure of the Invention" (Means for Solving the Problem) In order to achieve the above-mentioned object, the present inventors installed a rack in a position near the center of the boom in the length direction of the boom with relatively little temperature change. Each rack is fixed to the upper surface and adjacent to the rack is connected and fixed by bolts to the battens on both sides, while rack mounting brackets having horizontal elongated holes fixed to the boom and formed in the rack are provided. This paper proposes a coke oven melting repair device characterized in that a rack is mounted on the upper surface of the boom by overlapping horizontal long holes and tightening bolts. Since the thermal spray repair apparatus of the present invention has a structure that allows heat to escape, damage to the boom or rank will not occur.

(Function) The main part of the thermal spray repair apparatus of the present invention relates to a mounting mechanism for a hook for sending a boom for hot repair into a furnace. A distinctive feature is that care has been taken to prevent damage to the boom or rack due to thermal expansion of the rack attached to the top of the water-cooled boom.

In the present invention, (1) the rack is not made of a single metal product, but is divided into ranks to reduce the effects of thermal expansion or contraction.

■ Fix the center ridge to the boom at a position near the center in the length direction of the boom where there is relatively little temperature change, and connect the racks on the tip or base side adjacent to the rack with a batten, respectively. Therefore, care was taken to prevent the gaps between racks from widening.

■ The U-TSUKU mounting bracket fixed to the boom and the split rack each have long horizontal holes at the same height and are bolted together, so the rank is in close contact with the boom in the vertical direction. The structure was designed so that it could be freely expanded and contracted in the horizontal direction (longitudinal direction) using elongated holes, so that the shape would not be damaged.

(Example) FIG. 2 is a plan view showing an outline of a boom to which the device of the present invention is attached. A rack 2 is disposed on the top surface of a water-cooled boom 1 that feeds repair materials for repairing a coke oven to a burner at the tip, extending over almost the entire length of the boom. (Only a portion is shown in the drawing). This boom is moved forward and backward by the above-mentioned rack 2 meshing with a spur gear 5 driven by a hydraulic motor 4 provided on a support frame 3 and a coaxial pinion 6. A pair of guide rollers 7 at the front and rear are used to move the boom forward and backward. FIG. 3 is a side view schematically showing the part to which the rack of the present invention is attached, and one end of the hydraulic cylinder 10 is attached to the lower side 9 of the support frame that supports the boom placed on the pedestal 8 of the truck. The boom is fixed to the shaft, and the other end is fixed to the trolley, allowing the inclination angle of the boom to be changed arbitrarily.

11 is its tilting axis.

The position and size of the rank attached to the boom as well as the forward and backward movement mechanism can be understood from FIGS. 2 and 3 mentioned above. However, since the drawings are complicated, the rank attachment mechanism, which is the main part of the present invention, is omitted in both drawings.

FIG. 1 is a side view showing the main parts of the present invention (however, the upper tooth pattern of the rack is omitted). The center rack 2a is a rank located at a position near the longitudinal center of the boom with relatively little temperature change, and is fixed to a rack fixing fitting 20 fixed to the upper surface of the boom 1 with bolts 21. The respective divided racks 2b adjacent to the rank 2a are horizontally connected from both sides by battens 22 and bolts 21, but the battens 22 are only in contact with the boom and are not fixed. The split rack 2b is provided with elongated holes 24 at two places in the horizontal direction, and is overlapped with the horizontal elongated holes 24 of the same height provided in the rack mounting fittings 23, and is fastened with bolts 21 and mounted on the boom. However, the installed rack can freely expand and contract in the length direction due to the elongated holes, so there will be no damage to the boom or rack. The rank attachment fittings 23 are fixed to the upper surface of the boom by welding.

"Effects of the Invention" As detailed above, in the case of the thermal spray repair apparatus of the present invention, when installing the rank for forward and backward movement of the boom, the position near the center in the length direction of the rack where there is relatively little temperature change is installed. The center rack is fixed to the boom, and even though the front and rear split racks are connected, they are installed using horizontal long holes so that thermal expansion and contraction are not hindered, so there is no possibility of boom damage or rank. Thermal spray repair work can be carried out for a long period of time without causing damage.

[Brief explanation of drawings]

FIG. 1 is a side view showing the main parts of an embodiment of the present invention, FIG. 2 is a plan view showing an example of a boom drive mechanism in which the present invention is used, and FIG. 3 is a diagram showing a boom in which the present invention is used. FIG. 3 is a side view showing an example of a drive mechanism. l: Boom 9: Lower side of support frame 2 corners
10: Hydraulic cylinder 2a: Center rack
ll: Tilting axis 2b: Split rack 20 Nirakku fixing bracket 3: Support frame 21: Bolt 4: Hydraulic motor 22: Grain plate 5: Spur gear 23: Rank mounting bracket 6: Pinion 24: Long hole 7: Guide roller 8: Frame No. 21

Claims (1)

[Claims] A rack located at a position near the center of the boom in the length direction where there is relatively little temperature change is fixed to the top surface of the boom, and individual racks adjacent to the rack are connected and fixed by bolts to the battens on both sides, On the other hand, the coke is characterized in that the rack is mounted on the top surface of the boom by overlapping and bolting a rack mounting bracket having a horizontal long hole fixed to the boom and a horizontal long hole formed in the rack. Furnace spray repair equipment.