JPH11269527A - Torpedo car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the separation of a furnace body from a truck in a torpedo car and to use the separated truck connected with the other furnace body during a period repairing a refractory wall of the furnace body. SOLUTION: In the torpedo car 10 supported with trunnion shaft receivers 4 disposed at the front and the rear parts of the truck 1, the trunnion shaft 3, which is arranged at both end parts of the furnace body 2, is divided into a divided trunnion shaft 3A at the furnace body side and a divided trunnion shaft 3B at the shaft receiver side. To a spline opening part 13 horizontally arranged at the center part of the divided trunnion shaft 3A, a spline shaft 14 horizontally arranged in the divided trunnion shaft 3B is fitted with a spline joint combined so as to be possible to transfer the torque and attachably/ detachably. During repairing term of the furnace wall refractory in the furnace body 2, the truck 1 under free state by separating from the furnace body, is connected with the other furnace body 2 so as to be used as a torpedo car.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torpedo car in which trunnion shafts provided at both ends of a furnace body are supported by trunnion bearings disposed on front and rear bogies.

[0002]

2. Description of the Related Art As shown in FIG. 7, a torpedo car 10 for transporting hot metal from a blast furnace to a steelmaking plant equipped with a converter has a drum-shaped center portion of a furnace body 2 mounted on a front and rear bogie 1. ,
It has a long tapered shape on both sides, and runs on rails 12 via wheels 11 arranged on the trolley 1. The trunnion shafts 3 arranged at both ends of the furnace body 2 constituting the torpedo car 10 are:
It is supported by the bogie 1 via a trunnion bearing 4 arranged on a core plate 5 so as to be tiltable. A bull gear (gear) 6 is attached to one of the trunnion shafts 3 to receive and remove the hot metal from the furnace port 9, and the rotation of a driving device 7 installed on the bogie 1 is reduced by a bull gear 6 through a speed reducer 8. And the furnace body 2 is tilted left and right. At the time of tilting, the weight of the hot metal, refractory and the like in the furnace body 2 or the torque at the time of tilting acts on the trunnion portion of the furnace body 2.

[0003] The number of topedo cars required includes the number of blast furnaces and the amount of tapping, the distance from the blast furnace to the converter plant, the receiving capacity of the torpedo car, the number of converters and heat size, the refractory life of the topeed car and its repair. It is determined by various determinants such as conditions. The refractory walls installed inside the torpedo car are severely damaged because they are in contact with hot metal and slag. For this reason, in the early stage when damage is small, the tope car is operated while repeating the repair of the damaged portion and the like, but if the damage to the refractory wall becomes large, the repair of the refractory wall is performed.

[0004] In order to repair the refractory walls of the torpedo car frequently, conventionally, approximately one third of the total number of toad cars was necessary for repairing the refractory walls. Normally, the torpedo car and the trolley are integral with the furnace body.However, the trolley is required during renovation of the refractory wall when the repair shop and the dry shop are in different places. Only if
The trolley was not used during the repair. Therefore, if the furnace body of the torpedo car and the trolley can be separated and assembled easily, the number of trolleys will be the maximum number of the torpedo cars.

[0005] In order to facilitate the repair of the refractory wall installed inside the torpedo car, for example, Japanese Unexamined Patent Publication No. 6-287617 discloses that the furnace body of the torpedo car has a drum-shaped central portion and tapered side portions. There is a proposal for repairing by dividing into three parts. Although this measure is suitable for repairing the refractory wall with good workability, it does not allow the truck to be separated and used for use. Further, Japanese Utility Model Laid-Open No. 55-58651 discloses that the furnace body and the trunnion shaft both transmit torque and
A releasably coupled topid car is disclosed.

[0006]

According to the torpedo car structure disclosed in Japanese Utility Model Application Laid-Open No. 55-58651, there is a possibility that the bogie can be connected to another furnace body in a detached state. However, the structure is such that the connecting portion of the trunnion shaft is attached to and detached from the furnace shell while directly contacting the refractory wall.
Therefore, the trunnion connection portion and the furnace shell connected thereto are deformed under the influence of the high temperature. For this reason, the trunnion connection part separated from the furnace body is moved together with the bogie, and even if it comes into contact with another furnace body, the deformation state is different. It is thought that there is no.

[0007] The present invention solves the above-mentioned problems of the prior art, and makes it possible to separate the furnace body of the torpedo car from the bogie.
An object of the present invention is to provide a topped car capable of easily connecting a bogie to another furnace body while repairing a refractory wall of the furnace body.

[0008]

Means for Solving the Problems The following four places can be considered as places for separating the bogie of the torpedo car and the furnace body. That is, in FIG. 7, the bogie 1 on the driving side separates in the direction of arrow A at the location of the center plate 5 located below the trunnion bearing 4, and sees B in the coupling portion between the driving device 7 and the speed reducer 8. It is possible to separate the reduction gear 8 and the bull gear 6 in the direction of arrow C or to separate the trunnion shaft 3 in the direction of arrow D midway. Table 1 summarizes which of these four locations is suitable for separating the bogie 1 and the furnace body 2 from each other. In addition, in the bogie 1 on the support side, there are two places of the core plate 5 or the trunnion shaft 3.

[0009]

[Table 1]

As shown in Table 1, the bogie core plate portion A and the motor coupling portion B are preferable in terms of ease of separation and assembly. However, in terms of equipment necessary for the same number as the number of furnace bodies (equipment required to move and use the bogie because it remains on the furnace body side after separation, it is extremely advantageous to separate at the trunnion shaft D). Becomes Then, although it is difficult to separate and assemble, it is decided to divide at the position of the trunnion shaft portion D from the viewpoint of minimizing the equipment, and as a result of various studies, the present invention has been proposed.

According to a first aspect of the present invention, there is provided a torpedo car in which trunnion shafts provided at both ends of a furnace body are supported by trunnion bearings disposed on front and rear bogies. Is divided into a split trunnion shaft on the furnace body side and a split trunnion shaft on the bearing side, and a split portion of the trunnion shaft is coupled to be able to transmit torque and to be detachable.

According to a second aspect of the present invention, the split portion of the trunnion shaft is fitted with a spline shaft provided at the front end portion of the other split trunnion into a spline opening provided at the center of the front end of one split trunnion. 2. The torpedo car according to claim 1, wherein the spider joint is formed so as to be able to transmit torque and to be detachably attached thereto.

According to a third aspect of the present invention, the split portion of the trunnion shaft is joined to an opening provided at the center of the tip of one split trunnion and a shaft provided at the tip of the other split trunnion, 2. The torpedo car according to claim 1, wherein the two parts are coupled to each other so as to be able to transmit torque and to be detachable by a hole-shaft joining cotter joint formed by fixing the both with a cotter.

According to a fourth aspect of the present invention, the split portion of the trunnion shaft is joined to an opening provided at the center of the tip of one split trunnion and a shaft provided at the tip of the other split trunnion, 2. The torpedo car according to claim 1, wherein the two parts are coupled to each other so as to be able to transmit torque and to be detachable by a hole joint bolt joint for fixing the both with bolts.

According to a fifth aspect of the present invention, the split portion of the trunnion shaft abuts a flange provided at a tip portion of one split trunnion with a flange provided at a tip portion of the other split trunnion, and the both portions are bolted together. 2. The torpedo car according to claim 1, wherein torque is transmitted by a fixed flange joint and detachably connected.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. In the present invention, as shown in FIG. 1, the torpedo car 10 includes trunnion bearings 4 arranged on the front and rear bogies 1.
The trunnion shafts 3 provided at both ends of the furnace body 2 supported so as to be tiltable are divided into a divided trunnion shaft 3A on the furnace body side and a divided trunnion shaft 3B on the bearing side, and the divided portions are capable of transmitting torque, and , Which are detachably connected. Since the trunnion shaft 3 is a divided portion, there is no deformation due to the thermal effect of the furnace body 2, so that attachment and detachment can be easily performed. In this case, a spline opening 13 is provided at the center of the tip of the split trunnion shaft 3A on the furnace body side, and a spline shaft 14 is provided on the split trunnion shaft 3B on the bearing side.

Then, a plurality of projections 18 provided on the outer surface of the spline shaft 14 are fitted into a plurality of grooves 17 provided on the inner surface of the spline opening 13 to form a spline joint. , Detachably connected. For this reason, it is possible to move on the rail 12 by connecting and pulling the towing vehicle (not shown) to the bogie 1 of the topped car 10. When the furnace body 2 is tilted, the driving device 7
, The bull gear 6 is rotated via the speed reducer 8, and the furnace body 2 is tilted by the trunnion shaft 3 supported by the trunnion bearing 4.

When it is necessary to repair the refractory wall of the furnace body 2, the emptied torpedo car 10 is moved to a repair shop, and a pit 25 provided between the rails 12 laid on the floor of the repair shop is provided below. Stop at the position. A support member attached to the upper end by operating the lifting jack 15 placed in the pit 25
The furnace body 2 is raised as shown in FIG.
To be supported. Subsequently, the fitting between the spline opening 13 and the spline shaft 14 of each of the front and rear bogies 1 is loosened, the spline shaft 14 is pulled out from the spline opening 13 in the axial direction, and the bogie 1 and the furnace body 2 are separated.

In this manner, the furnace body 2 is used for repairing the refractory wall, while the front and rear bogies 1 are connected to the furnace body 2 having another furnace wall refractory repaired, and used for receiving iron from the blast furnace. Appropriated. A drive device 7, a speed reducer 8, a bull gear 6, a core plate 5, a trunnion bearing 4, and a split trunnion shaft
3B is mounted, and the core plate 5, the trunnion bearing 4, and the split trunnion shaft 3B are mounted on the support-side bogie 1, so that the torpedo car 10 can be used immediately.

As shown in FIGS. 3 (A) and 3 (B), a spline opening 13 is provided at the center of the tip of the split trunnion shaft 3B on the bearing side, which is opposite to the case of FIG. The spline shaft 14 can be provided on the trunnion shaft 3A. The operation and effect are the same regardless of which one is selected, but in the case of FIG. 3, the spline shaft is inserted into the groove 17 formed on the inner surface of the spline opening 13.
Protrusions 18 formed on the outer surface of 14 are fitted together. If the fitting between the spline opening 13 and the spline shaft 14 is tight, the torpedo car 10 can be fixed in the axial direction without falling off when moving. The fitting can be loosened to facilitate attachment and detachment. In this case, however, it is necessary to fix with a fixing means such as a retaining pin in the axial direction, such as a retaining pin, in order to prevent the fitting in the axial direction. A fixing means such as a retaining pin can be used as a safety measure to prevent falling off.

The hot metal produced in two blast furnaces (with a tapping capacity of 10,000 t / day) is received using the torpedo car (hot metal capacity 250 t) of the present invention in which the bogie and the furnace body shown in FIGS. 1 and 2 are detachable. Pigs were transported for a distance of 1 km between the blast furnace and the steel mill to be processed in two steel mills (steel making capacity of 10,000 t / day) equipped with converters with heat sizes of 250/300 tons. Minor repair of the refractory on the furnace wall of the torpedo car was repaired every 50 times for 5 days, and major repair was every 200 times for 20 days. Table 2 shows the required number of topied cars in the case of using the topied car of the present invention and in the case of using a conventional topedo car in which a bogie and a furnace body have a single body structure.

[0022]

[Table 2]

As shown in Table 2, according to the present invention, the required number of trucks can be reduced from 40 to 40, and the required number of topped cars is reduced by 2 /
3 was obtained. In addition,
The bogie did not require any repairs during this period that would affect its turnover. In the above embodiment, the example using the spline joint has been described. However, the present invention is not limited to this, and the following means can be used, and the same operation and effect as the above embodiment can be obtained. In the following means, the fitting relationship between the split trunnion on the bearing side and the split trunnion on the furnace body side can be reversed.

As shown in FIGS. 4A and 4B, a circular opening 19 provided at the center of the tip of the split trunnion shaft 3B on the bearing side.
In addition, the split trunnion shaft 3A provided on the furnace body side is joined, and both are fixed by a plurality of cotters 20 that are inserted from the side surface of the split trunnion shaft 3B on the bearing side into the split trunnion shaft 3A provided on the furnace body side. A joint can be formed, and can be connected so as to be able to transmit torque and to be detachable. In this case, the split trunnion shaft 3B on the bearing side and the split trunnion shaft 3A provided on the furnace body side are attached and detached by attaching and detaching the cotter 20.

As shown in FIGS. 5A and 5B, an opening 21 provided at the center of the tip of the split trunnion shaft 3B on the bearing side.
The split trunnion shaft 3A provided on the furnace body side is joined to the (opening with a square corner portion as a curved surface), and both are connected to the split trunnion shaft 3A provided on the furnace body side from the side surface of the split trunnion shaft 3B on the bearing side. A hole joint bolt joint fixed by a plurality of bolts 22 may be used. In this case, the split trunnion shaft 3B on the bearing side and the split trunnion shaft 3A provided on the furnace body side are attached and detached by attaching and detaching bolts 22.

Further, as shown in FIGS. 6A and 6B,
Flange 23 provided at the end of split trunnion shaft 3B on the bearing side
B has a flange at the end of the split trunnion 3A on the furnace side.
The flange joint may be formed by abutting 23A and fixing the both by bolts 24. In this case, attachment / detachment of the split trunnion shaft 3B on the bearing side and the split trunnion shaft 3A provided on the furnace body side is performed by detaching the flanges 23A and 23B by attaching and detaching bolts 22.

[0027]

According to the present invention as described above,
In a torpedo car in which trunnion shafts provided at both ends of a furnace body are supported by trunnion bearings arranged on front and rear bogies, the trunnion shaft is divided into a split trunnion shaft on the furnace body side and a split trunnion shaft on the bearing side, and the trunnion The divided portions of the shaft are connected to each other so as to be able to transmit torque and to be detachable. For this reason, when repairing the furnace wall refractory of the furnace body, the split part of the trunnion is cut off, only the furnace body is repaired, and the bogie that has become free due to the separation is repaired after the repair of the furnace wall refractory has been completed. It can be easily connected to a furnace body and can be used immediately. As a result, due to the increase in the rotation rate of the bogie,
The total number of bogies can be greatly reduced, and equipment costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a torpedo car according to the present invention, which makes a truck and a furnace body separable.

FIG. 2 is a side view showing a state in which a bogie and a furnace body of the torpedo car according to the present invention are separated.

FIG. 3 shows a spline joint of a trunnion split part according to the present invention, wherein (A) is a side view, and (B) is AA of (A).
It is sectional drawing which shows the arrow direction.

FIGS. 4A and 4B show a hole joint cotter joint of a trunnion split part according to the present invention, wherein FIG. 4A is a side view, and FIG.
It is sectional drawing which shows the -A arrow direction.

FIGS. 5A and 5B show a hole joint bolt joint of a trunnion split part according to the present invention, wherein FIG. 5A is a side view, and FIG.
It is sectional drawing which shows the -A arrow direction.

FIGS. 6A and 6B show a flange joint of the trunnion split part according to the present invention, wherein FIG. 6A is a side view, and FIG. 6B is a cross-sectional view of FIG.

FIG. 7 is a side view showing a conventional toy car in which a truck and a furnace body cannot be separated from each other.

[Explanation of symbols]

 Reference Signs List 1 cart 2 furnace body 3 trunnion shaft 3A, 3B split trunnion shaft 4 trunnion bearing 5 core plate 6 bull gear 7 drive unit 8 reduction gear 9 furnace opening 10 topeed car 11 wheel 12 rail 13 spline opening 14 spline shaft 15 lifting jack 16 support member 17 Groove 18 Protrusion 19 Circular hole 20 Cotta 21 Opening 22, 24 bolt 23A, 23B Flange 25 pit

Claims (5)

[Claims] 1. A trunnion shaft provided at both ends of a furnace body,
In a torpedo car supported by trunnion bearings disposed on front and rear bogies, the trunnion shaft is divided into a furnace body-side split trunnion shaft and a bearing-side split trunnion shaft,
A torpedo car characterized in that a split portion of the trunnion shaft is detachably coupled so as to transmit torque. 2. A split portion of the trunnion shaft is formed in a spline opening provided at a center of the tip of one of the split trunnions.
2. The torpedo car according to claim 1, wherein the spline joint is formed by fitting a spline shaft provided at the tip of the other split trunnion so as to be capable of transmitting torque and detachably. 3. The split part of the trunnion shaft is joined to an opening provided at the center of the tip of one split trunnion and the shaft provided at the tip of the other split trunnion, and both are fixed with a cotter. 2. The torpedo car according to claim 1, wherein the torpedo car is connected so as to be able to transmit torque and to be detachable by a formed hole-shaft joining cotter joint. 4. A hole in which a split portion of the trunnion shaft is joined to an opening provided at the center of the tip of one split trunnion and a shaft provided at the tip of the other split trunnion, and both are fixed by bolts. 2. The torpedo car according to claim 1, wherein the torpedo car is connected so as to be able to transmit torque and to be detachable by a shaft connecting bolt joint. 5. A split part of the trunnion shaft, in which a flange provided at a tip part of one split trunnion and a flange set at a tip part of the other split trunnion are abutted, and torque transmission is performed by a flange joint in which both parts are fixed with bolts. 2. The torpedo car according to claim 1, wherein the torpedo car is detachably connected to the car.