JPH09229565A - Tire roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize welding among members so as to save the labor and time of assembly and reduce heat losses of materials supported by a tire roller by providing notches in an annular hub and providing engaging protrusions on either one of the annular hub or a tire main body and notches in the other one. SOLUTION: A tire 2 comprises: a pair of annular hubs 3 which are mutually fitted into a water-cooled pipe, have an interval between each other on the water-cooled pipe and are so disposed as to be opposed to each other in the axial direction of the watercooled pipe; a tire main body 5 fitted onto the outer peripheral faces of the hubs 3 so as to extend across the hubs 3; and keys 4 which are fixed to the water-cooled pipe by welding, are engaged with the annular hubs 3 and work as turn-stops of the annular hubs 3 with respect to the water-cooled pipe. Each annular hub 3 is protrusively provided with an inner peripheral wall 31 and an outer peripheral wall 32 on an inner and an outer peripheral edges of an annular plate 30 so as to be directed outward, respectively, and a plurality of each of notches 33, 34 are provided at equal intervals on both the peripheral walls 31, 32, respectively. A protruding line circulating round an inner face of the tire main body 5 is formed at the center of a plane width of the inner periphery thereof, and a plurality of protrusions to be fitted into the notches 34 of the annular hub 3 are protrusively provided on both sides of the protruding line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire roller for material transfer provided in a heating furnace.

[0002]

BACKGROUND ART Heat-resistant steel is generally used for a tire roller for transferring a material in a furnace for heating the material at a high temperature, but when the heating temperature exceeds 1000 ° C., Since the creep strength of the roller is insufficient, a water-cooled type in which cooling water is circulated in the roller to cool the roller is used. However, since this water-cooled tire roller draws a large amount of heat from the material, the heat loss of the material is large, and since the temperature of the side of the material that contacts the roller is extremely reduced, the quality of the non-contact portion is high. There was a problem that the variation of the became large.

Therefore, as shown in FIG. 1, a water cooling pipe (10)
Attach heat-resistant annular tires (2) to multiple locations around the
A tire roller having a space between the tires (2) and (2) covered with a refractory material (7)
(1) is proposed. This is material (9) tire (2)
The outer peripheral surface of the material is supported to reduce the contact area with the material (9) and to reduce the amount of heat taken from the material. However, the tire (2) itself is a cast-molded integrated body, and the outer peripheral surface of the tire (2) exposed to the high temperature in the furnace (8) and the inner peripheral surface of the tire (2) in contact with the water cooling pipe (10). The difference in temperature between the tire and the surface is significant, and the tire (2) is cracked due to the thermal stress generated thereby.

Further, as shown in FIG. 8, a tire roller (1) having a heat insulating space (6) formed in a tire (2) has also been proposed.
(Japanese Patent Publication No. 7-62588). This consists of fitting a pair of annular hubs (3) into a water-cooled pipe (10) and mounting a tire main body (5) over the outer peripheral surfaces of both hubs (3) and (3). An annular heat insulating space (6) is formed between the hub (3) (3) and the water cooling pipe (10). The tire roller shown in FIG. 8 is intended to reduce the heat loss of the material supported by the tire (2) by the heat insulating action of the heat insulating space (6) of the tire (2). However, in order to transmit the rotational torque of the water cooling pipe (10) to the tire (2), the annular hubs (3) and (3) are welded to the water cooling pipe (10), and the annular hub (3) and the tire main body (5) are further welded.
Since the annular hub (3) and the tire main body (5) must be integrally fixed to the water-cooling pipe (10) by welding and, it takes a lot of time to mount them.

Further, the annular hub (3) is welded to the water cooling pipe (10) over the entire circumference, and the annular hub (3) and the tire main body (5) are also welded over the entire circumference. Water cooling pipe
(10) and annular hub (3) and annular hub (3) and tire main body
As a result, the heat transfer of (5) is assisted, which is not preferable from the viewpoint of heat insulation.

According to the present invention, in a tire roller having a hollow tire composed of a plurality of members, in order to transmit the rotational torque of the water cooling pipe (10) to the tire, the welding between the members is minimized to be assembled. To reduce the heat loss of the material supported by the tire roller, further reduce the temperature difference between the inside and outside of each member constituting the tire (2), and reduce the thermal stress acting on each member. The present invention proposes a tire roller capable of preventing cracking and extending the life of the tire (2).

[0007]

According to the present invention, in a tire roller (1) having hollow tires (2) mounted at a plurality of locations on the outer circumference of a water cooling pipe (10), each tire (2) is mutually water cooling pipe.
A pair of annular hubs (3) that are fitted in (10) and are axially opposed to each other at a distance on the pipe (10) and straddle the outer peripheral surfaces of both hubs (3) (3). The fitted tire main body (5) is welded and fixed to the water cooling pipe (10) and engaged with the annular hub (3) to form the annular hub.
The key (4) is formed by a key (4) which defines a rotation stop for the water cooling pipe (10), and the key (4) is fitted to the annular hub (3) from a direction parallel to the axial direction of the water cooling pipe (10). Compatible Notches (33)
Is formed, and the engaging protrusion (51) is provided on one of the annular hub (3) and the tire main body (5), and the protrusion (51) is provided on the other side of the water cooling pipe (10).
A notch (34) is provided which is fitted in a direction parallel to the axial direction of the tire and defines a detent for the tire main body (5) with respect to the annular hub (3).

[0008]

[Operation and effect] The protrusion of the annular hub (3) and the tire main body (5)
Since the notch (34) and the notch (34) can be fitted from a direction parallel to the axial direction of the water cooling pipe (10), the water cooling pipe (10) has an annular hub (3).
The tire main body (5) can be fitted in order and assembled. this is,
Assembling workability is also good in terms of weight and handleability as compared with fitting the tire (2) in advance to the water cooling pipe (10). The annular hub (3) is detented by the key (4) welded and fixed on the water cooling pipe (10), and the tire main body
(5) is an annular hub due to the engagement of the protrusion (51) and the notch (34).
Since the rotation stop is drawn against (3), in the present invention,
Only the key (4) needs to be welded and fixed to the water cooling pipe (10),
Ring hub (3) and water cooling pipe (10), ring hub as before
Compared to the case where the tire (3) and the tire main body (5) are welded over the entire circumference, the tire (2) can be attached easily. or,
Key (4) and annular hub (3), water cooling pipe (10) and annular hub
(3), the annular hub (3) and the key (4) are simply welded to each other and not welded to each other, so that the water cooling pipe (10) and the tire (2) are integrally formed by welding. The heat transfer is smaller than that of the case where the material is on the tire roller (1), so that the material on the tire roller (1) passes through the tire (2) through the water cooling pipe.
The heat loss taken by (10) can be reduced.

The outer peripheral surface and the inner peripheral surface of the tire main body (5),
The temperature difference between the outer peripheral surface and the inner peripheral surface of the annular hub (3) can be reduced,
It is possible to prevent cracking of the tire main body (5) and the annular hub (3) due to thermal stress due to the large temperature difference,
The life of (2) can be extended.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a tire roller of the present invention comprises a plurality of annular tires (2) mounted on a water cooling pipe (10) at substantially equal intervals. Water cooling pipe between (1
0) The surface is covered with a refractory material (7). The surface of the refractory material (7) is slightly lower than the outer peripheral surface of the tire (2). Both ends of the water cooling pipe (10) are provided with a shaft (12) projecting through a tapered connecting portion (11), the shaft (12) is supported, and a rotary drive device (not shown) is connected to one end of the shaft. There is. One shaft (1
The cooling water is supplied from 2) into the water cooling pipe (10) and discharged from the other shaft, or the cooling water supplied from the one shaft is fed to a guide pipe (not shown) in the water cooling pipe (10). It is guided and guided to the other end of the water cooling pipe (10), passes through the inside of the guide pipe, and is discharged from the original shaft side.

As shown in FIGS. 2 and 3, each tire (2) is
A pair of annular hubs (3) fitted to each other on the water cooling pipe (10) and axially opposed to each other with a space on the water cooling pipe (10).
An annular hub that is welded and fixed to a water-cooled pipe (10) and a tire main body (5) fitted over the outer peripheral surfaces of both hubs (3) and (3).
And a key (4) which engages with (3) and detents the annular hub (3) to the water cooling pipe (10). The two annular hubs (3) and (3) have inner peripheral walls (31) and outer peripheral walls (32) projecting outwardly from the inner peripheral edge and the outer peripheral edge of the annular plate (30), respectively.
A plurality of notches (33) and (34) are formed in 2) at equal intervals.

Notch (33) in the inner peripheral wall (31) of the annular hub (3)
The key (4), which will be described later, is fitted to the notch (3) of the outer peripheral wall (32).
The protrusion (51) of the tire main body (5) described later is fitted in 4). The tire main body (5) forms a ridge (50) around the inner surface at the center of the surface width, and the annular hubs (3) (3) are formed on both sides of the ridge (50). Is formed in a size that allows fitting. The tire main body (5) has a plurality of protrusions (5) which are fitted to the notches (34) of the outer peripheral wall (32) of the annular hub (3) on both sides of the protrusion (50).
1) is protruding. The protrusion (51) is integrally continuous with the protrusion (50) and the inner surface of the tire main body.

However, when manufacturing the tire roller (1),
Install the tire (2) at a predetermined position of the water cooling pipe (10). In this operation, the annular hub (3) is fitted to the water cooling pipe (10), and then the tire main body (5) is fitted so as to cover the annular hub (3), and the outer peripheral wall (32) of the annular hub (3) is fitted. The protrusion (51) of the tire main body (5) is fitted into the notch (34). From the opposite side of the annular hub (3), fit the other annular hub (3) into the water cooling pipe (10) and push the annular hub (3) into the tire main body (5) to remove the annular hub (3). The notch (34) of the outer peripheral wall (32) is fitted with the protrusion (51) of the tire main body (5). Key each notch (33) in the inner wall (31) of the annular hub (3)
(4) is fitted, and the key is welded (41) to the water cooling pipe (10) and fixed. As shown in FIG. 1, FIG. 5, FIG. 6, and FIG.
(2) A refractory material (7) is coated on the outer peripheral surface of the water cooling pipe (10) between (2).

Conventionally, Y-shaped studs (71), which are the core material of the refractory material (7), are provided on the surface of the water-cooled pipe (10) so as to project in a substantially regular arrangement. Although formed of carbon steel, stainless steel studs were used in the examples. This is to suppress the oxidation of the stud due to high heat. In the embodiment, the height of the outer peripheral surface of the refractory material (7) is aligned with the outer surface of the outer peripheral wall (32) of the annular hub (3), and the outer peripheral surface of the refractory material (7) is made of a stainless steel sleeve ( 72). Both ends of the sleeve (72) have annular hubs for the tire (2).
It covers the outer peripheral wall (32) of (3). In the past, the refractory material (7) was sometimes peeled off during use of the tire roller (1), but by protecting the refractory material (7) with the sleeve (71), there is no fear of this. lost.

The annular hub (3) and the protrusion (51) of the tire main body (5)
Since the notch (34) can be fitted from a direction parallel to the axial direction of the water cooling pipe (10), the annular hub (3) and the tire main body (5) can be fitted to the water cooling pipe (10) in this order for assembly. This has better assembling workability in terms of weight and ease of handling, as compared with fitting the tire (2) in advance to the water-cooled pipe (10). The annular hub (3) is detented by the key (4) welded and fixed on the water cooling pipe (10), and the tire main body (5)
Since the protrusion (51) and the notch (34) are engaged with each other to prevent the rotation from the annular hub (3), in the present invention,
Only the (4) needs to be welded and fixed to the water cooling pipe (10), and the ring hub (3), the water cooling pipe (10), and the ring hub (3) as in the conventional case.
As compared with the case where the tire main body (5) is welded over the entire circumference, the tire (2) can be attached more easily. Also, the key
(4) and annular hub (3), water cooling pipe (10) and annular hub (3),
Since the annular hub (3) and the key (4) are merely in contact with each other and not welded, the water-cooled pipe (10) and the tire (2) are integrated by welding. The heat transfer is smaller than in the case and therefore the tire roller
(1) The material above can reduce heat loss taken by the water cooling pipe (10) through the tire (2).

Further, the outer peripheral surface and the inner peripheral surface of the tire main body (5),
The temperature difference between the outer peripheral surface and the inner peripheral surface of the annular hub (3) can be reduced,
It is possible to prevent cracking of the tire main body (5) and the annular hub (3) due to thermal stress due to the large temperature difference,
The life of (2) can be extended. In the above description, the protrusion (51) is formed in the tire main body (5), and the notch (34) in which the protrusion (51) is fitted is formed in the annular hub (3) so that the annular hub (3) and the tire are Subject (5)
However, the notch is opened in the tire main body (5), and the protrusion that fits into the notch is provided in the annular hub (3) so as to project the annular hub (3) and the tire main body (5). It is of course possible to define the engagement of).

[0017]

EXAMPLES Next, concrete examples will be shown to show how the temperature difference between the outer peripheral side and the inner peripheral side of the split type hollow tire (2) in the tire roller (1) of the present invention becomes small. . The thermal stress applied to the tire (2) is calculated by the following formula.

[0018]

[Equation 1]

E: Young's modulus, d: expansion coefficient, ΔT: temperature difference μ: Poisson's ratio, b: outer diameter a: inner diameter From the above equation, in order to reduce the thermal stress applied to the tire, the temperature difference between the inner and outer surfaces of the tire It turns out that should be made as small as possible. The tire (2) of the tire roller (1) of the present invention is of a split type. The tire main body (5) and the annular hub (3) are separated, and the temperature difference between the tire main body (5) and the annular hub is 85 ° C.
Substituting the temperature difference of 108 ° C between and in (3) into the above equation,
The thermal stress (δ) of each was determined. The thermal stress applied to the tire main body (5) was 8 to 9 g / mm ² and the thermal stress applied to the annular hub (3) was 8 to 11 g / mm ² .

Incidentally, in the case of a conventional solid integrated tire which is neither a split type nor a hollow type, a tire of the split type whose inner and outer diameters are the above
When the temperature of the furnace (8) is the same as the above (2), the temperature of the outer peripheral surface of the tire (2) is 1120 ° C, the temperature of the inner peripheral surface is 500 ° C, and the temperature difference is 620 ° C. Also
The thermal stress applied to the tire (2) was as high as 80 g / mm ² . In the present invention, the thermal stress applied to the tire (2) is about 1/10 of that of the solid integrated tire, the load on the tire is significantly reduced, and the life of the tire can be greatly extended. The present invention is not limited to the configuration of the above embodiment, and various modifications are possible within the scope of the claims.

[Brief description of drawings]

FIG. 1 is a front view of a tire roller.

FIG. 2 is a perspective view of a tire.

FIG. 3 is an exploded perspective view of a tire.

FIG. 4 is a front view of a tire attached to a water cooling pipe.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a sectional view taken along line BB of FIG. 4;

FIG. 7 is a sectional view taken along line CC of FIG. 4;

FIG. 8 is a cross-sectional view showing a part of a tire roller to which a conventional hollow type tire is attached.

[Explanation of symbols]

 (1) Tire roller (2) Tire (3) Annular hub (4) Key (5) Tire main body

Claims (1)

[Claims] 1. A tire roller (1) having hollow tires (2) mounted at a plurality of locations on the outer periphery of a water cooling pipe (10),
Each of the tires (2) is fitted with a water cooling pipe (10) with each other, and a pair of annular hubs (3) axially opposed to each other with a space on the pipe (10) and both hubs (3) ( The tire main body (5) fitted over the outer peripheral surface of (3) and the water cooling pipe (1) of the annular hub (3) engaged with the annular hub (3) by being welded and fixed to the water cooling pipe (10).
It is composed of a key (4) that draws a detent against 0),
The annular hub (3) is provided with a notch (33) into which the key (4) can be fitted in a direction parallel to the axial direction of the water cooling pipe (10). One of the engaging protrusions (51),
On the other hand, the protrusion (51) is fitted from a direction parallel to the axial direction of the water cooling pipe (10) to form a notch (34) for detenting the tire main body (5) to the annular hub (3). Tire roller running.