JP3459476B2 - Coke oven door frame cutting equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention repairs scratches caused by knife edge pressing on the sheet surface of a door frame of a coke oven or the door frame of a leveling small lid, or gas leakage and oxidative corrosion, by cutting and flattening the coke oven. The present invention relates to a device for straightening and repairing a sheet surface curvature of a door frame caused by thermal distortion by cutting.

[0002]

2. Description of the Related Art A sheet surface of a coke oven door frame or the like is damaged by pressing a knife edge or by gas leakage and oxidative corrosion, and a gap is generated in a metal touch portion with a knife edge of a furnace lid to deteriorate gas sealing performance. As a result, the gas in the coke oven containing harmful coal tar leaks to the outside air, deteriorating the surrounding environment.

By the way, the coke oven door frame is distorted and curved due to the heat of the coke oven and the like, and there is an inclination due to the thermal expansion of the bricks at the top of the oven. As a method of cutting the seat surface of such a door frame, there is a method of cutting while detecting curvature with an end mill cutter, "Japanese Patent Laid-Open No. 5-247469".

In this method, a scanning scan is performed by a sensor on a curved or tilted door frame to bend or deform the door frame.
The amount of tilt is measured and stored, and the data is used to perform cutting to a constant depth on the sheet surface by advanced control such as cutter feed control, but there are the following problems.

Tar and coke powder are attached to the door frame which is the object of scanning scanning, so that even if data correction is performed, highly accurate cutting data cannot be obtained. The cutting work is a high temperature and a lot of dust in a coke oven immediately before the furnace, and installing precision equipment such as an advanced cutting control device has a problem in the reliability of the device. Equipment costs are high because of the need for sophisticated sensors and control devices. Since the cutter has an acute angle with respect to the cutting surface, even a slight difference in the cutting depth between the starting point and the ending point of the cutting sheet surface tends to cause stepping that hinders the gas sealability (the state is shown in FIG. 7). 7m coke oven with a depth of 4 on the seat surface of the door frame
When cutting flat all around mm, it takes a long time for scanning scanning, cutting data acquisition, cutting amount input operation, etc., so that the total working time per gate is 6 hours, which is a great obstacle to coke oven operation.

[0006]

DISCLOSURE OF THE INVENTION The present invention uses a grindstone cutting method to cut a door surface of a coke oven door, or a flat small flat door frame by knife edge pressing, gas leakage, and oxidative corrosion. The purpose is to improve the gas sealing property of the furnace lid by cutting (grinding) and removing to an arbitrary depth in a short time with a simple operation even in an inclined state.
Also, for curved parts of the door frame that exceed the knife edge stroke limit, the curve is repaired and straightened by cutting,
Similar to the above, the purpose is to improve the gas sealing property of the furnace lid.

[0007]

In order to achieve the above object, the present invention provides a trolley which runs along a platform of a coke oven with a vertical column, and a vertical moving machine platform is engaged with the vertical column in the front-rear and left-right directions. The right and left sliding bases are provided on the lifting and lowering machine base, and the front and rear sliding bases are provided on the left and right sliding bases. Provide a grindstone with a diameter larger than the width , and slide this with a constant pressure in the seat surface direction using an air or hydraulic actuator.
The above grindstone on the seat surface with a pressure control valve for constant pressure control.
The above-mentioned door frame cutting device for a coke oven characterized in that the seat surface cutting can be arbitrarily set by adjusting the rotational speed of the grindstone, the ascending / descending speed of the lifting / lowering machine stand, or the left / right speed of the left / right slide stand while being pressed further. A door frame cutting device for a coke oven according to the present invention, which is a leveling small lid in place of the above. Instead of the dolly traveling along the platform, the machine column detachably fixed on the platform is provided with vertical columns. It is constituted by the door frame cutting device of the coke oven according to the first or second invention.

[0008]

In the present invention, the carriage is stopped in front of the oven opening of the oven lid of the coke oven, or fixed on the platform with a crane, and the lifting / lowering machine stand or the left and right slides is installed at the cutting start point of the door frame sheet surface. moving the Dodai, the front surface of the cutting grindstone rotating shaft tip is opposed to the sheet surface of the leveling small lid frame of the seat surface or furnace roof of the door frame, a slide base front and rear d
(1) A hydraulic actuator is slid in the seat surface direction at a constant pressure to bring the rotary shaft tip grindstone into contact with the seat surface at a constant pressure.

The upright portion of the seat surface is cut to a constant depth by rotating the grindstone at a constant speed and moving the lifting / lowering machine base up and down at a constant speed. Similarly, in the upper and lower horizontal portions of the seat surface of the door frame or the small lid frame, the grindstone contacting the seat surface is rotated at a constant pressure with a constant rotation, and the left and right sliding bases are slid at a constant speed. Can be cut at depth.

In the case of the above grindstone cutting method, the door frame is curved,
When the grindstone is in surface contact with the door frame when it is moved to the cutting of the inclined convex portion, a reaction force is generated in the direction opposite to the door frame side of the rotary shaft, and acts on the actuator via the left and right sliding bases. Since the actuator uses air or hydraulic pressure control valves for constant pressure control and the like, the actuator moves to the side opposite to the door frame by a reaction force equal to or higher than a certain pressure. In this way, even if the door frame is curved or tilted, it is possible to easily perform a certain amount of depth cutting along the entire circumference of the door frame.

Even if the door frame is curved or tilted in this way, the door frame can be cut to a certain depth by the constant pressure of the grindstone, the constant rotation, and the constant vertical movement of the grindstone. It is also possible to cut the door frame to an arbitrary depth by adjusting the pressing pressure and the vertical ascent / descent speed.For example, if the pressing pressure of the whetstone is adjusted to the curved convex portion of the door frame and the vertical left / right velocity is slowed. The door frame curve can be straightened and repaired.

[0012]

[Embodiment] Guide car side platform 2 of coke oven 1
On the furnace side and anti-reactor side rail 3 for the guide car to travel,
3 is laid along the platform, and the above-mentioned rails 3, 3
A door frame cutting device carriage 4 of the present invention that travels by utilizing the above is provided. Two vertical columns 5 and 5 are provided on the trolley 4, and a horizontal frame 5 ′ is erected and connected to the upper end.
As shown in FIGS. 2 and 6, the upright guide rails 5 "and 5" are provided on the right and left inner sides of the upright columns 5 and 5, respectively. The guide rails 5 "and 5" are engaged by the guide rollers 50, 50 provided at both ends of the lifting / lowering machine base 6 so as to rotate in the front-rear direction and the left-right direction without any gap and to guide only in the up-down direction. Has become.

As shown in FIG. 2, the lifting / moving machine base 6 has one end of a chain 13 connected to the upper end of the lifting / moving machine base 6 and is pivotally supported at the center of the left-right direction frame 5'at the upper ends of the uprights 5 and 5. Upper central guide sprocket 14, drive motor 22 for vertical movement
The chain is detoured by the drive sprocket 15, the lower lateral sprocket 16, and the central guide sprocket 17 which are driven and rotated by the speed reducing sprocket 23.
The other end of 3 is connected to the lower end of the lifting / lowering machine base 6. As shown in FIG. 2, in the middle of the chain 13, a balance weight 18a is interposed outside the right-side vertical column for stabilizing the moving speed.
Of course, it may be inside the vertical pillar.

A horizontal sliding guide 1 is mounted on the lifting / lowering machine base 6.
8 and 18 are provided, and the left and right slides 7 are provided on the guides 18 and 18.
And a slide guide 20 in the front-rear direction on the slide base 7,
20 is provided, and the front-rear slide base 8 is supported by the guides 20, 20.

As shown in FIG. 3, the front-rear slide base 8 is provided with a front-rear direction covered bearing cylinder 9'for accommodating the front-rear direction rotation shaft 9, and the front-rear end portions of the rotation shaft 9 therein are bearings 9 ", 9 "
The seat surface 10 ′ of the door frame 10 or the seat surface 41 ′ of the small lid 41 is supported by the rotating shaft 9 protruding forward.
The grindstone 11 having a diameter larger than the width is fixedly provided.

The front-rear slide of the front-rear slide base 8 is performed by connecting the front part of the front-rear slide base 8 and the rear part of the left-right slide base 7 by an air or hydraulic actuator 12 and applying a force of the actuator 12. The slide base 8 can be slid in the front-back direction. Further, the rotary shaft 9 and the grindstone 11 installed via the front and rear slide base 8 also move back and forth in the same manner as the front and rear slide base 8 slides.

With such an apparatus structure, the grindstone 11 is moved to the seat surface 1 by the air or hydraulic actuator 12.
0'or the seat surface 41 ', the rotary shaft 9 is rotated and the lifting / lowering moving machine base 6 or the left / right sliding base 7 is moved up / down or left / right to move the seat surface 10' of the door frame 10 or the small size. This is a device that cuts the seat surface 41 ′ of the lid 41 while making a full revolution. The constant pressure control of the grindstone can be constituted by a general air or hydraulic circuit using an air or hydraulic pressure reducing valve, a pressure adjusting valve or a relief valve.

Incidentally, the cutting in the present invention is performed by the door frame 10
The cutting of the seat surface 10 'is performed after the furnace lid 40 (FIG. 7) mounted on the door frame 10 is detached by the furnace lid detaching device provided in the guide car. The sheet surface 41 ′ of the small lid 41 provided on the upper end of the furnace lid 40 is cut by opening the opening / closing door 41 ″ of the small lid while the furnace lid 40 is mounted on the coke oven 1.

In the figure of the appendix, FIG. 6 is a general view, 22 in FIGS. 1 and 2 is a forward / reverse electric motor, 23 is a deceleration sprocket, 24 in FIG. 3 is a drive chain for the rotary shaft 9, 25 is a V belt, Figure 5
The middle 26 is a female screw provided on the lower surface of the left and right slide base 7, 27 is a left-right screw rod that is screwed into the female screw 26, 28 is an expansion and contraction covering tube thereof, 30 is a bearing of the left-right screw rod 27, and 31 is a screw rod 27. It is a forward / reverse rotation electric motor.

The above-described door frame cutting embodiment is a method for cutting the seat surface of the coke guide car side door frame of the coke oven by a single cutting device carriage, but it can also be installed in the coke guide car. . On one extruder side, since the platform is generally not laid with rails, either the rails are laid or the method is carried out by moving the cutting device as a single truck with rubber tires, or the extruder is used. Alternatively, the method may be carried out by mounting it on the.

The cutting device for leveling small-lid door frames is also a single trolley system, and there is a method of combining it with the above-mentioned extruder-side door frame cutting device, or a method of carrying it out as a dolly for exclusive use of small-lid door frames. Alternatively, it can be mounted on an extruder and cut.

A machine stand 4'is used instead of the carriage 4, and the machine stand 4'is mounted on the platform 2 by a crane as shown in FIGS. 9 and 10, and the upright pillar 5 provided on the machine stand 4 '. 5,
Is fixed to the backstays 32, 32 by the holding metal fittings 34, 34, the upright guide rails 5 ", 5" are provided inside the uprights 5, 5 as described above, and the elevating and moving machine frame 6 is moved up and down along the upright guide rails 5 ", 5". Can be provided in the same manner as described above to provide the door frame cutting device described above. Incidentally, reference numeral 42 in FIG. 3 denotes a heat insulating plate for cutting off the heat of the furnace.

[0023]

As described above, according to the present invention, the seat surface of the door frame or the small lid can be easily attached while the door frame of the coke oven is installed in the coke oven or the oven lid is attached to the coke oven. Even if the door frame is curved or tilted, the grindstone is pressed by a constant pressure, and by having a pressure relief circuit, it is possible to easily cut a fixed amount along the entire circumference in accordance with the curvature and tilt of the door frame. Also press the grindstone,
It is also possible to correct the door frame curve to a straight line by adjusting the rotation speed and the vertical movement speed. In the test of actually cutting the door frame with this cutting method, the entire circumference of the seat surface was cut by 4 mm, the cutting time was 2 hours, and the cutting seat surface roughness was 6
Very good results of s could be obtained. Further, in the cutting with a grindstone, since the step between the cutting start point and the end point is eliminated, the step is not generated by performing the finish cutting control by slightly reducing the pressure at the end point cutting. Even if there is a slight difference in cutting depth, in the case of this method, since the cutting end surface of the grindstone has a roundness, there is no step difference on the sheet surface that hinders the gas sealability. The 2 hours of cutting after obtaining good cutting sheet surface roughness by this method is about 3 times faster than the conventional end mill cutter method, and requires a long time for the conventional method to operate the coke oven. The problem that was greatly affected by was solved by the cutting method of this method.
In addition, since it is a simple operation that can obtain a constant cutting depth at a constant pressure, a constant number of rotations, and a constant moving speed to the grindstone, it requires operation scanning and cutting control by a sensor like the cutting method by an end mill cutter. Since the device is extremely simple, the cost is lower than that of the end mill cutter system, and the device can be operated easily. In addition, the outdoor coke oven cuts even in the immediate vicinity of the heat and dust
Since there are no precision equipment such as control devices, there are few failures. As described above, the cutting method using the grindstone of the present invention is extremely easy to operate as compared with the conventional end mill cutting method, and the door frame and the like are curved for a short time, and are cut by a certain amount by following the inclined door frame, or the curved Straight line repair can be performed, and the gas sealing property of the coke oven furnace lid mounting portion can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing a coke oven door frame cutting device of the present invention.

FIG. 2 is a front view of another embodiment of FIG.

FIG. 3 is a side view of the central portion of FIG.

FIG. 4 is a front view of left and right and front and rear slides.

FIG. 5 is a front view of FIG. 4 as viewed from the right side.

FIG. 6 is an enlarged front view of the drive device for the left and right slides.

FIG. 7 is a front view of the opened small lid and the surface of the small lid sheet.

FIG. 8 is an enlarged plan view of a cutting state by a conventional end mill cutter.

FIG. 9 is a side view of a fixed machine base.

FIG. 10 is a plan view of FIG.

[Explanation of symbols]

1 coke oven 2 platforms 3 rails 4 dolly 4'machine 5 vertical columns 6 Lifting and moving platform 7 Left and right slide 8 Front and rear slide 9 Front-rear rotation axis 10 door frame 10 'seat surface 11 grinder grindstone 12 Air or hydraulic actuator 40 hearth 41 small lid 41 'Small lid sheet surface

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Ogawa 958-23, Ariasu, Shonai-cho, Kaho-gun, Fukuoka Prefecture Kouchibukuro Co., Ltd. (72) Akihide Oba, Arihide, Shonai-cho, Kaho-gun, Fukuoka Prefecture 958-23 Inside Sachibukuro Co., Ltd. (72) Inventor Shuichi Ando 958-23, Ari, Shonai-cho, Kaho-gun, Fukuoka Prefecture Inside Kochibukuro Co., Ltd. (56) Reference JP-A-5-247469 (JP, A) JP-A-4- 7393 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C10B 25/02 C10B 43/04

Claims (3)

(57) [Claims] 1. A trolley that travels along the platform of a coke oven is provided with a vertical column, and a vertical moving machine base is engaged with the vertical column in the front-rear and left-right directions, and a horizontal slide table is provided on the vertical moving machine base. , A front-rear slide table is provided on the left-right slide table, and a grindstone having a diameter larger than the width of the seat surface of the door frame is provided at the tip of the front-rear direction rotating shaft provided on the front-rear slide table. Sliding with constant pressure in the seat surface direction by the actuator
The above grindstone on the seat surface with a pressure control valve for constant pressure control
A door frame cutting device for a coke oven, characterized in that the seat surface cutting can be arbitrarily set by adjusting the rotational speed of the grindstone, the ascending / descending speed of the lifting / lowering machine stand, or the left / right speed of the left / right slide stand while being pressed by . 2. The door frame cutting device for a coke oven according to claim 1, wherein the door frame is a leveling small lid instead of the door frame. 3. The coke oven door frame cutting device according to claim 1, wherein a stand pillar is provided on a machine base that is detachably fixed on the platform instead of the carriage that travels along the platform.