JPS5949514B2 - Frame gunning device for lining repair equipped with a separable lance - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flame gunning device for repairing the lining of converters and other refining vessels.

Generally, the lifespan of a scouring vessel such as a converter is determined by the rate of wear of the refractory lining, and shutting down the furnace due to partial wear of the refractory lining causes major disadvantages in terms of refractory consumption, energy consumption, etc.

This tendency is particularly noticeable under severe conditions with high tapping temperatures, so it is a great advantage to repair partially worn lining parts and keep the amount of wear on the entire furnace at a constant level. Conventionally, a dry repair method as described in Japanese Patent Publication No. 51-40841 has been known as a method for repairing partially worn parts of refractory linings of converters and other refining vessels.

This dry repair method involves spraying pulverized refractories, solid pulverized fuel, and oxygen from a nozzle at the tip of a thermal spray lance onto the furnace wall at a high temperature of 1,350 to 1,500 degrees Celsius, for example, immediately after tapping the steel, and then combusting it. This method is called a flame gunning method, in which a refractory that has been molten or semi-molten by flame is sprayed onto the worn parts of the refractory lining, and the refractory lining is bonded to the refractory for repair. The flame gunning device used in this flame gunning method is equipped with a long steel thermal spraying lance, for example, 7 to 10 meters long and 100 to 200 cm in outer diameter, and this thermal spraying lance has an internal structure. This long and heavy thermal spray lance consists of four concentrically arranged passages for passing a mixture of pulverized refractories and solid pulverized fuel, oxygen gas, and cooling water (supply and return). is rotatably and tiltably supported on a cart at one end, and the thermal spraying lance is unilaterally protruded and extended from the cart, and has the function of rotating, turning, tilting, and moving the thermal spraying lance. Move the nozzle at the tip of the lance to any position in the furnace,
It has a mechanism that allows frame gunning.

As mentioned above, the flame gunning device performs flame gunning of the refractory on the worn parts of the refining vessel.
Flame gunning This is used for flame gunning work, which aims to maintain the coated refractory at the same thickness as the furnace lining and extend the life of the lining. For this reason, the frame gunning device has a lining (
Even if a worn part occurs and flame gunning is required, the furnace will be in a state of 7.
It is necessary to store the flame gunning device in a place where it does not affect the work around the furnace and keep it on standby, and to be able to quickly move it to a position in front of the furnace when necessary.In other words, it is required to be mobile when gunning. . In addition, since two or three smelting furnaces are usually installed and blowing is performed alternately, the flame gunning equipment can be moved quickly between each furnace in order to carry out gunning using this down period. This is required. However, conventional gunning equipment (1) is large and requires a large space for standby storage because the spray lance is particularly long; (2) it is heavy and difficult to move; 3) Changing direction during movement requires space due to the long thermal spray lance, and considerable consideration is required in case of collision.
In addition, (4) thermal spray lances that protrude only in one direction from the trolley are unstable and pose a risk of falling, and (5) when suspended by a crane, special jigs and special wires are required, which takes time. waste.

There are other inconveniences.

In view of the above-mentioned points, the present invention increases the movement function of the cart and occupies it during evacuation, standby, and storage by detachably attaching the lance to the cart and configuring it so that it can be separated from the cart. Measure the efficiency of area. With the goal.

The invention will now be explained with reference to the drawings.

As shown in the drawings, the truck 1 includes a frame 2 and four running wheels 3, and a drive device 4 such as an engine and a hydraulic power source driven by the engine is provided in the frame 2, so that the truck 1 can be moved. It is configured to be self-propelled and capable of driving various hydraulic cylinder devices and other hydraulic actuators that will be described later.

7 An upright support 5 is provided on the frame 2, and a swing arm 6 is supported on this so as to be able to swing via a bearing 7. A drive arm 8 is provided on the swing arm 6, and this drive arm 8 is connected to It is connected to a piston rod 10 of a cylinder device 9 by a pin 11, so that the swinging hydraulic cylinder device 9 can swing the swinging arm 6 within a certain range.

A movable arm 12 for tilting the lance is rotatably supported on the swing arm 6 via a bearing 14 at its base end 13, and a drive arm 15 extending downward from the movable arm 12 is connected to a hydraulic cylinder device 16 for tilting. It is connected to the piston rod 17 by a pin 18 so as to be tiltable.

A bearing clamp device 20 is provided on the lance tilting movable arm 12 to detachably hold the thermal spraying lance 19 and at the same time to rotatably support it.

This bearing clamp device 20 is provided with a fixed clamp finger 21 formed near the movable arm 12 for tilting the lance, and a movable clamp finger 23 pivotally connected to the movable arm 12 by a pin 22. A bearing 24 is installed on the thermal spraying lance 19, and the bearing 24 is held by a bearing gripping block 25.
This gripping block 25 is constructed so that it can be clamped and held between both fixed and movable clamp fingers 21 and 23 by the opening and closing operations of the fixed and movable clamp fingers 21 and 23.
A hydraulic cylinder 26 is connected between the movable arm 12 and the movable clamp J-C connector 13 as a device for opening and closing the J-C connectors 21 and 23. Movable arm for tilting 1
A lance rotation drive motor 27 is provided on 2, and this motor 2
The thermal spraying lance 19 can be rotated by the drive motor 27 by meshing the pinion 28 driven by the motor 7 with the gear 2S on the thermal spraying lance 19.

The above-mentioned swing hydraulic cylinder device 9, tilting hydraulic cylinder device 16, hydraulic cylinder device 26 for opening/closing the bearing clamp device 20, and lance rotation drive motor 27 are driven by hydraulic pressure from the hydraulic source 4 provided on the trolley 1. It is possible to do so.

In the drawing, 30 indicates a cooling water supply/discharge hose, 31 indicates an oxygen gas supply hose, and 32 indicates a mixed repair material supply hose of pulverized refractories and solid pulverized fuel. cooling water return passage 33
and supply passage 34, oxygen passage 35, and mixed repair material passage 3.
6 at the rear end of the lance. Next, the operation of the apparatus having the above-mentioned structure will be explained with respect to frame gunning work.

When performing frame gunning work, use the trolley 1.
The hydraulic power source 4 that moves each movable part is driven by an engine or the like built in the truck frame 2 (not shown).

Driven by a hydraulic power source, the trolley 1 travels on four wheels 3. At this time, if the wheels 3 are made to be able to change direction within the range of 0 to 120, the cart 1 can change its direction and its maneuverability is further improved. First, the trolley 1 is moved from the evacuation or storage position to the side of the stand 37 for the lance 19, and the thermal spraying lance stored on the stand 37 is moved.
A lance gripping block (not shown) attached to the middle of the lengthwise direction of 19 is connected to a clamp J on arm 12 on truck 1.
It is grabbed by the handles 21 and 23 and transferred from the stand 37 onto the trolley 1. As a result, the thermal spraying lance 19 is held firmly on the carriage 1 at its longitudinal center as shown in FIG. In this way, the cart 1 holding the thermal spraying lance 19 travels toward the refining furnace 38, and once lowers the thermal spraying lance 19 onto a temporary stand 41 provided in front of the furnace (see FIG. 3). Next, the trolley 1 leaves the thermal spraying lance 19 on the temporary stand 41 and moves the furnace 38 to the furnace 38 which is tilted 900 degrees.
9, and at a predetermined position, that is, the position where the bearing gripping block 25 on the lance 19 and the clamp fingers 21, 23 on the trolley 1 match, the thermal spraying lance 19 is moved again with the fingers 21. , 23, and hoses 30, 31, and 32 for pulverized refractory material, fuel, oxygen, cooling water, etc. are connected to the rear end of the thermal spray lamp.

Next, after moving the trolley 1 to move the thermal spraying lance 19 and the furnace opening 39 out of the The thermal spraying lance 19 is rotated, tilted, and rotated in accordance with the repair location, and is further moved forward and backward by the trolley 1 for positioning, and a predetermined amount of fine powder refractory and solid fine coke is sprayed from the nozzle 41 at the tip of the thermal spraying lance 19. Flame gunning is performed by spraying the mixture together with oxygen gas onto the surface of the high temperature refractory lining of the furnace wall.

At the end of gunning, the operations described above are reversed, i.e.
Open the bearing clamp device, temporarily place the lance, remove the hose, change the thermal spray lance and move away.

As described above, according to the present invention, the thermal spraying lance has a structure that can be separated from the cart, so that the cart can be moved safely and quickly, especially between furnaces, and the lance is taken into consideration when storing. There is no need for it, and it can fit in cramped spaces and has little impact on the work space. Further, there are various advantages such as being able to easily and reliably carry out transfer operations to and from the lance stand when separating and attaching the thermal spraying lance, and also being able to construct the entire apparatus compactly and robustly.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a frame gunning device according to the present invention, Fig. 2 is a partially sectional front view of the device shown in Fig. 1, Fig. 3 is an explanatory diagram of the operation of the device, and Fig. 4 is a trolley. It is a route map showing the lance support state during movement. 1... Trolley, 2... Frame, 3... Wheels, 4...
... Drive device, 5... Upright column, 6... Swivel arm, 7... Bearing, 8... Drive arm, 9... Hydraulic cylinder device for swing, 12... Movable for tilting lance. Arm, 16... Hydraulic cylinder device for tilting, 19... Spraying lance, 20... Bearing clamp device, 21... Fixed clamp finger 1, 23... Movable clamp finger 1, 24...・Bearing, 6...Bearing gripping block, 26
... Hydraulic cylinder for opening/closing the bearing clamp device, 27
...Lance rotation drive motor, 28...Pinion, 2
9...Gear.

Claims (1)

[Claims] 1 A truck, a swing arm rotatably provided on the truck, a movable arm for tilting a lance whose base end is rotatably supported by the swing arm and projects toward the side of the truck, and a lance. a bearing rotatably supported around its axis; a bearing clamp device provided on the tip of the movable arm for tilting the lance and capable of opening and closing for clamping the bearing on the lance; A frame gunning device for repairing linings, comprising a lance rotation drive device, and the lance can be separated from the truck.