JPH0432690A - Hot spray repair apparatus for chamber oven type coke furnace - Google Patents

Abstract

PURPOSE:To enable spray repairing by mounting a spray lance retractably in a lance holder on which a monitor camera is installed, thereby preventing blur of the monitor camera or over cooling due to enlargement of an opening. CONSTITUTION:A running truck is moved in front of a specified furnace with a wheel 14 of a motor 15 and then, a base 8 is lifted with a lift 11 up to a specified position. Then. the base 8 is turned with a motor 10 about a turning shaft 9 so that the tip of a lance 1 is put into the furnace. Then, a guide rail 6 is tilted by a specified angle with a cylinder 7 for tilting on the base 8 and a lance holder 3 is moved longitudinally while the lance 1 is delivered to get a nozzle 2 at the tip of the lance set on a specified straying surface. In a spray repairing, the lance 1 is reciprocated slow longitudinally in stead of being at rest to finish a wall surface and this action is observed with a monitor camera as indicated by 16 provided on the top surface of the tip of the lance holder 3 at rest. Thus, the finishing is accomplished by moving the lance sometimes or another with a tilting device as indicated by 7, a turning device as indicted by 10, a lifter indicated by 11 or an advance/retraction mechanism of the lance holder 3.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a hot thermal spray repair device that can be advantageously used for indoor coke ovens having narrow and deep walls.

<Prior Art> A common method for repairing coke oven walls by thermal spraying involves moving a nozzle while a worker directly monitors the thermal spraying situation visually.

Another known method is to incorporate a surveillance camera into a part of the lance, as disclosed in Japanese Patent Laid-Open No. 17688/1983.

In these cases, the lance has a depth of 8 m, for example.
In order to carry out this, it is common to use a long lance with a straight length exceeding 10 m including the holding mechanism outside the furnace body.

However, the method of direct human monitoring is possible if the repair power station is near the kiln entrance, but if it is located about 8 meters away and narrow, such as in the center of the kiln, the field of view will be almost parallel to the wall surface. It was not possible to ascertain the thermal spraying and finishing conditions.

In addition, the method of directly incorporating a monitoring camera into the lance had the disadvantage that it was difficult to grasp the flat surface because the monitoring camera also moved during thermal spraying, in which the lance was moved back and forth to smooth the surface.

Some straight-sized lances are unstable to install because the deck outside the furnace body is narrow, and there is a method to install them from the vertical direction, but to prevent cooling of the furnace body during repairs, it is necessary to open the temporary lid for work. It was necessary to increase the size, which led to cooling of the furnace body, which was undesirable.

<Problems to be Solved by the Invention> The purpose of the present invention is to enable easy observation and monitoring of the repaired area even during flat thermal spraying in which smoothing is performed by moving the lance back and forth, and even on a narrow deck outside the furnace body. It is an object of the present invention to provide a hot thermal spraying repair device for an indoor coke oven that can be stably operated and does not require enlarging the opening of a temporary lid for work.

Means for Solving the Problems> The present invention provides a tiltable guide rail on a base that is provided on a traveling carriage and is capable of raising and lowering and turning, and a lance holder that moves along the guide rail and a lance holder that moves along the guide rail. This is a hot thermal spraying repair device for an indoor coke oven, characterized in that a thermal spraying lance is provided in a lance holder so as to be freely drawn out, and a repair wall surface monitoring camera is provided on the lance holder.

<Function> According to the present invention, the lance holder is movable along the guide rail, the thermal spraying lance is mounted in the lance holder so as to be freely drawn out, and the surveillance camera is installed on the lance holder, so that the lance is not drawn out. By keeping the length constant and adjusting the position using the lance holder length, the surveillance camera can monitor the sprayed surface from an angle without shaking during monitoring, and at the same time, by retracting it into the lance holder after work is completed, The opening can be minimized and the overall length can also be reduced.

Therefore, the problem with conventional long lances is that of surveillance cameras.
Alternatively, thermal spraying repairs can be performed by preventing overcooling of the furnace due to an oversized opening.

<Example> FIG. 1 is an explanatory diagram when the apparatus according to the present invention is used in a deep place. This figure shows a case where a portion of the temporary work cover 17 was opened to a minimum extent in advance during thermal spray repair. FIG. 2 shows a side view during traveling, in which the traveling cart is moved to a predetermined location in front of the furnace by the motor 15 and the transport 14, and then the base 8 is raised to a predetermined position by the lifting device f11.

Next, the base 8 is rotated around the pivot shaft 9 by the motor 10 so that the tip of the lance 1 faces the inside of the furnace.

Next, on the base 8, move the guide rail 6 around 1 to the diversion cylinder 7.
Then, the lance holder 3 is moved back and forth, and the lance 1 is let out so that the nozzle 2 at the tip of the lance is set at a predetermined spraying surface.

During thermal spray repair, the lance 1 does not remain stationary, but moves slowly back and forth to finish the wall surface, and this is observed by 16 monitoring cameras installed on the top of the tip of the stationary lance holder 3. sometimes 7 tilting devices, 1
Finishing is carried out while moving using the rotating device 0 or the elevating mechanism 1 11 and the forward and backward movement mechanism of the lance holder 3. The thermal spray agent, fuel for thermal spraying, oxygen, lance cooling water, etc. are connected to the lance 1 through a hose 30. The hose 30 is expanded and contracted by a hose reel 31. Connection to the hose reel is made by a hose (not shown).

FIG. 3 is an explanatory diagram showing the relationship between a monitoring camera and a thermal spraying position.

FIG. 4 is an internal schematic diagram of the lance holder 3.

The lance 1 connected to the chain 23 and the fixed piece 24 moves forward and backward by the forward and reverse rotation of the sprocket 21 connected to the lance driving motor. 22 is a holding sprocket when driving the chain, and 25 is a roller for holding the lance.

Although not shown in the drawings, the lance holder and lance are fed out and tilted, and the base 8 is rotated and raised and lowered by remote control.

<Effects of the Invention> The present invention provides a two-stage telescoping lance for repairing the narrow and deep wall of a chamber coke oven, and a surveillance camera is placed on the side of the lance holder that moves less during thermal spraying. As a result, monitoring can be carried out with a three-dimensional effect, and the prevention of kiln cooling due to the insertion and removal of long lances can be minimized, making it possible to carry out efficient and stable thermal spray repair work.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of thermal spray repair work according to the present invention, Fig. 2 is a side view during traveling, Fig. 3 is an explanatory diagram showing the relationship between the spray from the tip of the lance during thermal spraying and a monitoring camera, FIG. 4 is a schematic diagram of the inside of the lance holder. 1... Lance, 2... Nozzle, 3...
Lance holder 4... Lance holder drive motor 5... Moving frame, 6... Guide rail, 7
...Tilt cylinder 8...Base, 9...Base rotation axis, 10.
... Base rotation drive motor 11 ... Lifting device, 13 ... Lower traveling platform frame,
14... Traveling wheel, 15... Traveling motor 16... Surveillance camera, 17... Temporary lid for work, 3
0...Hose, 31...Hose reel.

Claims (1)

[Claims] A tiltable guide rail is provided on a base that can be raised and lowered and rotated on a traveling trolley, and a lance holder that moves along the guide rail and a thermal spraying lance that is mounted in the lance holder so as to be freely drawn out are installed. 1. A hot spraying repair device for an indoor coke oven, characterized in that a repair wall monitoring camera is provided on the lance holder.