JPS637320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for lining with refractory the inner wall of a molten metal conveying vessel having a small inlet and extending internally at right angles to the inlet.

Conventionally, spraying repairs in furnaces with small entrances, such as molten metal transport containers, such as pig iron mixers, have been carried out by connecting the spraying nozzle and pressure feeder with a material transfer hose, and then bringing the spraying nozzle into the furnace and allowing the worker to move it to any desired position. The lining was applied to the same nozzle. However, in such spraying work, due to the rebound of the sprayed material,
It impairs visibility inside the furnace and makes appropriate repairs difficult.
Moreover, there are many problems such as the extremely poor working environment due to dust and the danger of objects falling from the upper part of the furnace.
Improvement was desired.

The present invention aims to eliminate the above-mentioned drawbacks and provide optimal repair.The present invention has a boom that can be extended and retracted at right angles to the furnace mouth after insertion through a small furnace mouth, and has a boom that can extend and retract at right angles to the furnace mouth. By installing a spray nozzle that can be directed in any direction, it is possible to spray the entire area inside the furnace without the need for workers to enter the furnace, and the entire device can be mounted on a transport vehicle such as a truck. By equipping it with a vehicle, it has even greater maneuverability.

That is, the present invention provides a truck that moves parallel to the furnace mouth surface of a molten metal transport container, a main boom that is disposed on the truck and can move forward and backward toward the furnace mouth of the transport container, and A cross boom is attached to the tip of the boom so that it can rotate freely on a horizontal plane and expands and contracts in the direction of its axis.A cross boom is attached eccentrically to the tip of the boom and rotates around its axis and also rotates with respect to the axis of the cross boom. This invention relates to a device for repairing the inner surface of a container for transporting molten metal, which comprises a nozzle that can be bent freely.

An embodiment of the present invention will be described below with reference to the drawings.

Figures 1 and 2 show the overall configuration of the inner surface repair device according to the present invention, and in the figures, A is a mixed iron car furnace body, and the furnace mouth B is tilted 90 degrees from the upright position. It is in a state of

The truck 51 on which the entire device is mounted is positioned rearward at approximately right angles to the furnace mouth B, and the device including the truck 51 is secured by four outriggers 2 attached to the four corners of the device mounting base 1. It is done. The power for the entire system including this outrigger 2 is taken out from the PTO shaft of the engine of the truck 51, and all necessary electric power is supplied from the battery of the truck 51.

The device mounting base 1 has on its upper surface a pressure feeder 3, a chain block 4 for raising and lowering the pressure feeder 3 above and below the base 1 and the work floor G, an operation panel 5 for controlling each part of the device, and a hydraulic unit 6. , and the main body of the device is installed.

The main body of the device includes a cart 8 which can be moved parallel to the furnace mouth B by a necessary cart traverse mechanism on the device mounting base 1.
installed on top.

A main boom 9 is arranged on a truck 8 in a substantially horizontal state. In addition, the main boom 9 is essentially 4
It is supported on the truck 8 via a boom support/advance/retreat mechanism consisting of a joint parallel link mechanism. The same mechanism also includes a mechanism that moves the tip of the main boom 9 up and down.

In addition, a hydraulic motor 14 is installed at the tip of the main boom 9.
A cross boom 16 is attached which can be rotated 180 degrees by driving and can be extended and retracted in several stages by several hydraulic cylinders 15. Further, a nozzle 19 is attached to the tip of the cross boom 16, which is rotated by a hydraulic motor 17 and whose direction is controlled by a hydraulic cylinder 18. The hydraulic oil is supplied to the hydraulic motor 17 and the hydraulic cylinder 18 by a cable carrier 20 that is installed parallel to the cross boom 16 up to the nozzle 19 and expands and contracts in response to the expansion and contraction of the cross boom 16.

Details of each component in the above overall configuration are shown in the third section.
As shown in FIG.

First, the traversing mechanism of the truck 8 is shown in FIGS. 3 to 6. A guide rail 21 made of channel steel is laid on the device mounting base 1 parallel to the moving direction of the trolley 8 and sandwiching the trolley 8 therebetween. The trolley 8 has a plurality of upper and lower guide wheels 22 and left and right guide wheels 23 attached to both sides thereof, and both of these wheels are disposed in the guide rail 21 so as to be freely rollable (Figs. 5 and 6). figure). Furthermore, a hydraulic cylinder 7 for traversing the trolley is installed in the equipment mounting base 1, and the base end of the cylinder 7 is connected to the end wall of the base 1, and the telescopic rod end is connected to the trolley 8 through a bracket. It is connected to the back of the . With this configuration, the carriage 8 can be moved parallel to the furnace mouth B by driving the hydraulic cylinder 7.

Next, the main boom 9 and the boom support/advance/retreat mechanism will be explained with reference to FIG.

The main boom 9 has its proximal end supported on the trolley 8, and its tip extends into the furnace body A via the furnace mouth B. In this embodiment, the boom support/advance/retract mechanism includes a pair of swingable vertical link plates 10,
Both ends of the boom 11 are rotatably supported on the proximal end of the main boom 9 and the trolley 8 by pin connection, forming a four-bar parallel link mechanism of which the main boom 9 is a part, and furthermore, the boom can be moved forward and backward. Hydraulic cylinder 1
3 is attached to the link plate 10, its base end is pivotally supported on the trolley 8, and the telescopic rod end is pivotally supported on the upper part of the link 10. With this configuration, the hydraulic cylinder 13 can be driven to move the main boom 9 forward and backward while maintaining the horizontal state through the four-bar parallel link mechanism.
The boom support/advancement/retraction mechanism also includes a mechanism for raising and lowering the tip of the main boom 9. In this embodiment, this mechanism includes a pivot pin 9a at the base end of the main boom 9.
The base end of a cylinder 12 for vertical movement of the boom is arranged in the link plate 11, and the pivot pin 9a is slidably fitted into a vertically elongated hole 9b provided in the longitudinal direction at the upper end of the link plate 11. is pivoted to the lower end of the link plate 11, and its telescopic rod end is connected to the pivot pin 9.
It is formed by connecting to a. Therefore, as the hydraulic cylinder 12 expands and contracts, the tip of the main boom 9 moves up and down using the link plate 10 and the pin connection portion 25 of the main boom 9 as a fulcrum. Furthermore, the main boom 9 has a hydraulic motor 14 attached to its tip for rotating the cross boom 16 on a horizontal plane, so that the axis of the motor 14 is vertical. Furthermore, the motor 14 is equipped with a disc brake 26 to prevent the cross boom 16 from overrunning (excessive rotation).

Next, the structure of the cross boom section will be explained with reference to FIG. FIG. 8 is a front view of the cross boom 16, which is connected to the main boom 9 by a rotating shaft 27. The cross boom 16 is configured to extend and contract in four stages using two hydraulic cylinders 28 and 29. The chain 35 that comes out from the turnbuckle 34 fixed to the top surface of the first stage boom 30 is bent through a sprocket 37 provided on the top surface of the first stage boom 30 and a sprocket 38 at the rear of the second stage boom 31, and then connected to the third stage boom 30. The second boom 32 is connected to the rear end thereof. In addition, the chain 36 coming out from the rear turnbuckle 39 of the first stage boom 30 connects to the second stage boom 31.
It is connected to the rear end of the third stage boom 32 which is wound around a sprocket 40 in the middle.

As described above, the first stage boom 30, the second stage boom 31, and the third stage boom 32 are connected to the two chains 3.
5 and 36, and whose base end is pivoted to the first stage boom 30 and whose telescopic rod end is pivoted to the front of the second stage boom 31, the hydraulic cylinder 28 is connected to the first stage boom 30. 2nd stage boom 3
1 is at the same speed as the hydraulic cylinder 28, and the third stage boom 3
2 means that it expands and contracts at twice the speed.

In addition, the hydraulic cylinder 29 has its base end connected to the third stage boom 3.
At the same time, the telescopic rod end is pivoted to the end of 4.
It is pivotally supported at the tip of the fourth stage boom 33, so that the extension and contraction of the hydraulic cylinder 29 is controlled by the fourth stage boom 33.
will be extended and contracted with respect to the third stage boom 32.

Next, the spray nozzle section will be explained with reference to FIGS. 9 to 11.

The spray nozzle section is connected to the tip of the fourth stage boom 33 of the cross boom 16 by a bracket 41, and is composed of a nozzle rotating section that rotates and a fixed section that supports the rotating section. The fixing part is substantially formed by a bracket 41, and the bracket 41
A hydraulic motor 17 is mounted at a position offset by a required amount from the axis of the cross boom 16. In addition, the nozzle rotating section has a rotating shaft 100 having an axis parallel to the axis of the cross boom 16 attached to the middle of the bracket 41, and a gear 43 fixed to the rotating shaft 100 and a gear 43 attached to the output shaft of the hydraulic motor 17.
2 and a nozzle 19 is attached to the tip of the rotating shaft 100.
With this configuration, when the hydraulic motor 17 is rotated, the nozzle 19 also rotates as one unit. In addition, the nozzle 19 is
Directional control is possible up to 95 degrees. In other words, the nozzle mounting part is a rotary joint 44 bent into a hook shape.
The nozzle 19 is connected to this rotary joint 44, and the rotating shaft 100 has a bracket 45 fixed to its outer surface that rotates integrally with the rotating shaft.
A hydraulic cylinder 18 is mounted which extends towards the zero axis. Further, a lever 46 protruding from the mid-lower portion of the rotary joint 44 is connected to the telescopic rod end of the hydraulic cylinder 18. By expanding and contracting the hydraulic cylinder 18, the spray nozzle 19 is rotated and directionally controlled at the same time. The supply of working oil pressure to the hydraulic cylinder 18, the supply of working air to the material clogging prevention air nozzle 47, and the supply of water to the water ring 48 are performed by a rotary joint 49 formed in the bearing portion of the rotating shaft 100. .

Further, the material for spraying is supplied from a material hose connected to a swivel joint 50 provided at the rear of the rotating shaft 100, passes through the hollow portions of the rotary joints 49 and 44, and is discharged from the nozzle 19. In addition,
The cross boom 16 retracts to the end of its stroke,
When the nozzle 19 reaches the furnace mouth, the nozzle 19 is switched from a rotational motion to a repetitive motion depending on the size of the furnace mouth B in order to prevent the material from being discharged from the furnace mouth B.

When configured as described above, FIGS. 1 and 2
As shown in the figure, the cross boom 16 can be inserted into the furnace by tilting the furnace mouth B of the mixer car furnace body A by 90 degrees from the normal position. After extending the cross boom 16 to the stroke end, press the start button. By pressing , it becomes possible to automatically spray the inner surfaces of the mirror part, inclined part, and straight cylinder part in the pig iron mixer furnace body A using a switch or the like in the operation panel 5.

This operation will be specifically explained with reference to FIGS. 12 to 18.

First, the cross boom 16 is inserted into the furnace body A in parallel with the main boom 9. Next, rotate the cross boom 16 by 90 degrees to make it perpendicular to the main boom 9 (Figure 12). Extend the cross boom 16 to the stroke end and direct the nozzle 19 toward the center of the mirror section. After that, by pressing the start button, the following operations are automatically performed. While rotating, the nozzle 19 changes its angle and sprays a portion of the inclined portion from the mirror portion (FIG. 13). Under program control, the nozzle 19 adapts to the inner surface shape of the furnace body A and transfers the spray from an inclined portion perpendicular to the inner wall to a straight cylindrical portion.
The cross boom 16 is retracted while the nozzle 19 is kept rotating, and the refractory is sprayed onto the inner surface. (14th
figure).

After that, continue spraying to the straight cylinder part (15th
figure). After the cross boom 16 retracts to the end of its stroke, the nozzle 19 rotates in a reciprocating motion excluding the furnace mouth B in order to prevent the refractory material from blowing out from the furnace mouth B (FIG. 16). Furthermore, the trolley 8 on which the main body of the device is placed starts moving, and the nozzle 19
When the position reaches the center of the furnace, each operation will automatically stop.

After the above automatic operation, return the main boom 9 to the position shown in Fig. 12, and move the cross boom 16 to 180°.
(Figures 17 and 18). Next, the right side of the inner surface of the furnace body A is sprayed in the same manner.
After the entire surface is sprayed, the main boom 9 and cross boom 16 are pulled out from the furnace by the reverse operation shown in FIG.

As described above, the inner surface repair device according to the present invention can quickly and safely repair the inner surface of a molten metal transport container.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an inner surface repair device for a molten metal container according to the present invention, FIG. 2 is a side view of the same, FIG. 3 is a plan view of a truck, and FIG. 4 is a cross-sectional view taken along the line of FIG. Figure 5 is a cross-sectional side view of the upper and lower guide wheels, Figure 6 is a cross-sectional side view of the left and right guide wheels, Figure 7 is an enlarged front view of the main boom and boom advancement/retraction mechanism, and Figure 8 is a front view of the cross boom. , FIG. 9 is an enlarged sectional front view of the spray nozzle part, FIG. 10 is an enlarged sectional front view of the spray nozzle, and FIG. 11 is an enlarged sectional front view of the spray nozzle part.
The line arrow views and FIGS. 12 to 18 are explanatory diagrams of the spraying operation. In the figure, A...mixture car furnace body (molten metal transport container),
B... Furnace mouth, 51... Truck, 1... Device mounting base, 2... Outrigger, 3... Pressure feeder, 4...
...Chain block, 5...Operation panel, 6...Hydraulic unit, 8...Dolly, 9...Main boom, 1
0...Link board, 11...Link board, 16...Cross boom, 19...Nozzle.

Claims (1)

[Scope of Claims] 1. A truck that moves parallel to the furnace mouth surface of the molten metal transport container, a main boom that is disposed on the truck and can move forward and backward toward the furnace mouth of the transport container, and A cross boom is attached to the tip of the main boom so that it can freely rotate on a horizontal plane and expands and contracts in the direction of its axis. A device for repairing the inner surface of a container for transporting molten metal, consisting of a bendable nozzle. 2. The device for repairing the inner surface of a molten metal transport container according to claim 1, wherein the cart can be transported by a transport vehicle such as a truck.