JPH045991Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a drive device for a rotary industrial kiln, which places a heated object on an annular hearth and rotates the hearth to perform a predetermined process. Regarding.

(Prior Art) A rotary industrial kiln is one in which an object to be heated is placed on a hearth, and the object to be heated is processed in a prescribed manner while rotating the hearth, and is disclosed in U.S. Pat. No. 2,417,063. .

In this technology, the object to be heated is placed on top of an annular hearth, and a hood lined with refractory material is placed over the annular hearth to form an annular furnace body.The hearth is placed on an annular beam. It is placed on. An annular rack is disposed on the lower surface of this beam, and a gear is disposed to mesh with this rack. A shaft passes through the gear, and a driving device such as an electric motor and a speed reducer is connected to one end of the shaft.

By operating this drive device, the gears rotate, and since the gears mesh easily, the rack rotates. Since the rack is fixed to the beam, the beam rotates as the rack rotates. An annular hearth is fixed to the top of the beam, so the hearth rotates. In this way, conventional rotary industrial kilns are driven by racks and gears.

In addition, as another method, disclosed in Utility Model Application Publication No. 59-103196, index pins are mounted and fixed on the rotary hearth at regular intervals around the circumference, and an operating member having a V-shaped groove to engage with the index pins, and its operation A hearth driving device for a hearth rotary heating furnace is disclosed, which is provided with a driving member that moves a member in the rotational direction of the hearth, and a hearth locking means that engages with an index pin to prevent rotation of the hearth. ing.

(Problem to be solved by the invention) According to U.S. Patent No. 2,417,063, a gear is engaged with a rack provided on the lower surface of a beam supporting the hearth, a shaft is passed through this gear, and a drive device is attached to the shaft. In a rotary furnace that rotates the hearth by connecting them, the inside of the rotary furnace is filled with high-temperature atmospheric gas, so if the atmospheric gas leaks from the sealing part, the temperature of the rack and gear engagement area will rise, causing the rack and The gears become deformed due to heat and become undriveable. Further, even if atmospheric gas does not leak from the sealing portion, the engaging portion of the gear becomes high in temperature due to radiant heat, so thermal deformation of the rack and gear cannot be prevented. For this reason, it is conceivable to cool the rack and the engaging portions of the gears so that they do not reach high temperatures, but this would require a cooling device or the like, which would increase the equipment cost.

Next, the operating member disclosed in Utility Model Application Publication No. 59-103196 has a V-shaped groove for fixing index pins to the rotary hearth at equal intervals around the circumference and engaging the index pins;
A hearth driving device for a hearth rotary heating furnace is provided with a driving member that moves the operating member in the rotational direction of the hearth, and a hearth locking means that engages with an index pin to prevent rotation of the hearth. Since the indexing pin is provided with the V-shaped groove engaging portion of the operating member, the indexing pin cannot be engaged with the V-shaped groove unless the pitch accuracy of the indexing pin is strict. Therefore, if the pitch accuracy of the index pin becomes inconsistent due to various factors such as machining accuracy, assembly accuracy, thermal deformation of the truck frame, and aging of the truck frame, the index pin should be engaged with the V-shaped groove. I can't do it anymore.

In this prior art, it is stated that even if there is some variation in the rotation angle of the rotary hearth, the variation can be corrected because the engaging portion is a V-shaped groove. In large rotary furnaces with floors weighing up to 1,000 tons, the carts do not move even slightly just by pushing in the V-shaped grooves, so it is not possible to compensate for variations in rotation angle. In order to maintain the pitch accuracy of the hearth rotation, an extra hearth locking means is required.

Further, since the operating member having the V-shaped groove does not move along the circumference of the rotary hearth, rotational sliding occurs between the pin and the V-shaped groove, causing wear due to the sliding. Pressing control of the cylinder (operating member) that presses the V-shaped groove must follow the circular arc, which is very difficult.

For example, if the pressing force is insufficient, the pin will come off from the V-shaped groove, making it impossible to drive the hearth, while if the pressing force is too strong, unreasonable force will be applied to the pin, accelerating wear between the pin and the V-shaped groove.

Further, since the engaging portion is a pin and a V-shaped groove, there is a line contact, and the surface pressure of the engaging portion is large, which also increases the wear of the pin and V-shaped groove.

(Means for Solving the Problem) In order to solve the problem, the present invention places the object to be heated on an annular rotary hearth, and connects the cart frame disposed at the bottom of the rotary hearth to a drive device. In a driving device for a rotary industrial kiln that performs a predetermined process by rotationally driving the kiln, a bracket having only one side as a contact surface is vertically disposed at a predetermined interval on the lower surface of the outer periphery of the dolly frame. A drive cylinder is swingably disposed at a predetermined position below the outer periphery of the bracket 4, and a metal fitting that presses from one direction against the contact surface of the bracket is pivotally attached to the rod tip of the drive cylinder with a pin. A rotary industrial kiln, characterized in that an arc-shaped guide rail along the outer periphery of the trolley frame on which the metal fitting moves is arranged at a predetermined position on the outer periphery of the trolley frame so as to be swingable by a swing cylinder. It is a driving device.

(Function) The guide rail 17 disposed at a predetermined position on the outer periphery of the bogie frame 4 is brought close to the bogie frame 17 by actuating the connecting cylinder 21. Next, the drive cylinder 7 is activated. When the drive cylinder 7 is actuated, the metal fitting 10 disposed at the tip of the drive cylinder 7 rod 9
moves along the guide rail 17, the metal fitting 10 contacts the bracket 6 disposed on the truck frame 4, and pushes the bracket 6a.

Since the brackets 6 are arranged at predetermined intervals, the cart frame 4 is rotated by pressing the brackets 6 one after another. When the bracket 6 is pushed and a predetermined rotation is completed, the driving cylinder 7 is pulled to separate the metal fitting 10 and the bracket 6, and then the connecting cylinder 21 is pulled to separate the guide rail 17 from the truck frame 4. Next, the drive cylinder 7 is pulled again and stopped at the position of the next bracket 6a arranged on the truck frame 4.

(Example) The present invention will be explained below based on an example device shown in the drawings. Note that FIG. 1 is a front sectional view showing an embodiment of the present invention, FIG. 2 is a view taken along the line A--A in FIG. 1, and FIG. 3 is an operational diagram of the present drive device. Fourth
The figure shows a structural diagram of the coupling device.

In FIGS. 1, 2, and 3, brackets 6 are vertically installed on the lower surface of the outer periphery of the truck frame 4 at predetermined intervals. On the other hand, a drive cylinder 7 is disposed at a predetermined position below the outer periphery of the truck frame 4. The drive cylinder 7 includes a drive cylinder rotating part (trunnion) 8
A metal fitting 10 that engages with the bracket 6 is attached to a pin 1 at the tip of the rod 9 of the drive cylinder 7.
Connect at 3. As shown in FIG. 3c, the engagement between the bracket 6 and the metal fitting is surface contact, and the metal fitting 10 is pressed from the right to push the bracket 6a. The metal fitting 10 passes through a shaft from the side, and a support roller 11 is disposed on the shaft to form a movable truck. Further, the metal fitting 10 is also provided with a guide roller 12.

Next, a guide rail 17 on which the metal fitting 10 runs is provided below the outer circumference of the truck frame 4. The guide rail 17 has an arc shape along the outer periphery of the truck frame 4, as shown in FIG. 3b. This guide rail 17 has a swing cylinder 15 for approaching and retracting from the truck frame 4.
are connected.

The operation of the illustrated device will be explained with reference to FIG.

FIG. 3a shows the metal fitting 10 waiting at the starting point A, and FIG. 3b shows the metal fitting 10 at the starting point A.
is pushed to point B by the swing cylinder 15 and is crimped to the bracket 6a. In this state, C
By pushing with the drive cylinder 7 towards the point,
Rotary hearth 2 and bracket 6 as shown in Figure 3c.
The figure shows a state where a has been rotated by a predetermined pitch.

When the rotation of the hearth is completed, first, in order to return the metal fitting 10 at point C to the starting point A while avoiding interference with the bracket 6b, as shown in FIG. 3d,
The metal fitting 10 is pulled to point D by the driving cylinder 7.
It is then pulled to point E by the swing cylinder 15 and is shown separated from the bracket 6a. In this state, by pulling the support cart 10 toward the starting point A with the drive cylinder 7, the support cart 10 returns to the state shown in FIG. 3a, completing one cycle.

Furthermore, even if thermal deformation or the like occurs in the truck frame 4 and the bracket 6, the swing cylinder 15 connected to the guide rail 17 is supported by the trunnion 16, and the metal fitting 10 that travels along the guide rail 17 is not driven. Pin 1 to rod 9 of cylinder 7
Since it is swingably supported at 3, not only the stroke but also the pressing force can be adjusted as desired.

Further, as shown in FIG. 4, by connecting the bracket 6 and the metal fitting 10 with a connecting rod 14, it is also possible to rotate the rotary hearth 2 in the opposite direction. Further, although FIG. 4 shows the connection rod 14 being automatically connected by the attachment/detachment cylinder 21, it is of course also possible to manually insert and connect the connection rod 14.

(Effect of idea) The present invention has the following remarkable effects.

Even if the position (pitch) accuracy of the bracket is incorrect due to various factors such as machining accuracy, assembly accuracy, thermal deformation of the trolley frame, aging of the trolley frame, etc., contact and pressing between the bracket and the press fitting will be impossible. It can be done smoothly without any problems.

Therefore, it is not necessary to mount the brackets at predetermined pitches with great precision. Therefore, the bracket does not require machining, is easy to install, and has low equipment costs.

There is no need to maintain the stop position of the hearth with extremely high precision. Therefore, there is no need for a conventional hearth locking means, and the equipment cost is reduced.

The movement of the pressing bracket is guided by the guide rail along the trolley frame, so there is no sliding in the direction perpendicular to the direction of movement on the contact surface between the bracket and the pressing bracket, so there is no wear on the contact surface. Since no unreasonable force is applied in the direction perpendicular to the direction of movement, there is no risk of damage to the drive device.

Since the contact between the bracket and the pressing fitting is surface contact, surface pressure is small and wear and tear on the contact portion is almost eliminated.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view showing an embodiment of the present invention, Fig. 2 is a view taken along the line A-A in Fig. 1, Fig. 3 is an operational diagram of the present drive device, and Fig. 4 is a A structural diagram of the coupling device is shown. DESCRIPTION OF SYMBOLS 1... Furnace wall, 2... Rotating hearth, 3... Sealing device, 4... Dolly frame, 5... Support wheels, 6...
... Bracket, 7 ... Drive cylinder, 8 ... Cylinder rotation part, 9 ... Cylinder rod, 10 ... Metal fitting, 11 ... Support roller, 12 ... Side roller, 13, 20, 24 ... Pin, 14 ... ... Connection rod, 15 ... Swing cylinder, 16, 18 ... Trunnion, 17 ... Guide rail, 19 ... Support roller, 21 ... Detachable cylinder, 22 ... Pinion, 23 ... Rack.

Claims (1)

[Claims for Utility Model Registration] An object to be heated is placed on an annular rotary hearth 2, and a dolly frame 4 disposed at the bottom of the rotary hearth 2 is rotated by a drive device to carry out predetermined processing. In the driving device for a rotary industrial kiln, brackets 6 having only one side as a contact surface are vertically disposed at a predetermined interval on the lower outer periphery of the cart frame 4, and below the outer periphery of the cart frame 4,
A drive cylinder 7 is swingably disposed at a predetermined position, and a metal fitting 10 that presses against the contact surface of the bracket 6 from one direction is pivoted to the tip of the rod 9 of the drive cylinder 7 so as to swing freely. The rotary type is characterized in that an arc-shaped guide rail 17 along the outer periphery of the truck frame on which the metal fitting 10 moves is arranged at a predetermined position on the outer periphery of the truck frame 4 so as to be swingable by a swing cylinder 15. Drive equipment for industrial kilns.