JP7016645B2 - Rotating structure - Google Patents

Description

The present invention relates to a rotating structure comprising a cylindrical main body arranged sideways and an annular body attached to the outer periphery of the main body, and the main body is rotatably supported via the annular body. Is.

A rotary stoker-type incinerator is known as one of the devices for incinerating waste and the like.

The rotary stoker type incinerator has a configuration in which a cylindrical furnace body is arranged sideways in a posture in which the axial center direction is tilted at a set angle.

Tires, which are metal annular bodies, are attached to the outer periphery of the furnace body near both ends in the axial direction, and each tire is placed on the upper side of a rotation support device such as a roller. As a result, the furnace body is rotatably supported on the rotation support device via the tire.

By the way, in a rotary stoker type incinerator, since the furnace body is affected by the combustion heat of the incinerator during operation, the diameter of the furnace body increases due to thermal expansion as compared with the initial state before operation.

On the other hand, since the tire is not directly affected by the combustion heat and is easily cooled by contact with the outside air, the increase in the diameter dimension due to the thermal expansion of the tire is compared with the increase in the diameter dimension of the furnace body. Is small.

Therefore, a connecting device having a function of absorbing a difference in thermal expansion is usually provided between the furnace body and the tire, and the connecting device rotates the furnace body and the tire together. In addition to being connected to the tire, the difference in the amount of deformation due to the difference in thermal expansion between the furnace body and the tire is absorbed.

As a coupling device of this type, a spring assembly has been conventionally proposed (see, for example, Patent Document 1).

In this spring assembly, in a configuration in which tires are arranged on the outer periphery of the furnace body with a gap, a longitudinal intermediate portion of a spring member extending in the tangential direction thereof is attached to the outer peripheral surface of the furnace body by welding or bolting. Has been done. Further, both ends of the spring member in the longitudinal direction are rotatably (rotatably) attached to a clevis member provided on the inner peripheral surface of the tire at intervals in the circumferential direction.

According to the spring assembly having such a configuration, the furnace body and the tire are connected to each other via the spring member, so that they can rotate together. Further, it is said that the difference in thermal expansion between the furnace body and the tire can be dealt with by deformation such as bending or bending of the spring member.

Japanese Unexamined Patent Publication No. 9-170734

By the way, in what is shown in Patent Document 1, when a difference in thermal expansion occurs between the furnace body and the tire, the spring member has a longitudinal intermediate portion attached to the furnace body in the outer peripheral direction rather than both ends in the longitudinal direction. Because it is pushed, it is always in a bent state.

In this state, the spring member moves in the circumferential direction along with the rotation of the furnace body and the tire. At this time, when the spring member is located on the lower end side in the circumferential direction, the intermediate portion in the longitudinal direction of the spring member is By receiving the weight of the furnace body, it is further pushed downward, that is, toward the outer peripheral direction. On the other hand, when the spring member is located on the upper end side in the circumferential direction, the longitudinal intermediate portion of the spring member is pulled downward, that is, toward the inner peripheral side by receiving the weight of the furnace body.

Further, when the spring member is located on the side portion in the circumferential direction, the spring member remains bent and is subjected to the action of a force including a downward component on the intermediate portion in the longitudinal direction due to the weight of the furnace body.

Therefore, when the spring member moves in the circumferential direction, the state of bending deformation is not constant, and the bending is constantly increased or decreased. Further, the spring member has a bending method at a longitudinal intermediate portion attached to the furnace body, a portion located closer to one end than the longitudinal intermediate portion, and a portion located closer to the other end. It may be different.

Therefore, in the conventional spring assembly, the fatigue of the spring member that repeatedly increases and decreases the bending deformation is large, and the stress acting on the attachment portion of the spring member to the furnace body is also large. Therefore, it is difficult to increase the durability of this spring assembly.

Therefore, the present invention includes a cylindrical main body arranged sideways like a furnace body and a tire in a rotary stoker furnace, and an annular body arranged on the outer periphery of the main body, and the main body and the annular body are provided. In a rotating structure provided with a connecting device having a function of connecting the main body and the annular body so as to rotate together and absorbing the difference in thermal expansion between the two bodies, the connecting device is connected to the main body and the annular body. It is an object of the present invention to provide a rotating structure capable of absorbing the difference in thermal expansion generated in the above regardless of bending deformation of the member and improving the durability of the connecting device.

In order to solve the above problems, the present invention comprises a cylindrical main body arranged sideways in a furnace or a drying device for incinerating waste, and an annular body arranged on the outer periphery of the main body with a gap. A coupling device provided between the main body and the annular body to absorb the difference in thermal expansion between the main body and the annular body is provided, and the coupling device extends in a direction along the chord of the annular body. Locking members whose ends are arranged at positions corresponding to the connecting member attached to the annular body and the central portion in the longitudinal direction of the connecting member, and attached to either the outer peripheral surface of the main body or the connecting member. A load transmitting portion attached to either the outer peripheral surface of the main body or the connecting member, provided with walls arranged at positions on both sides of the main body in the circumferential direction with respect to the portion and the locking portion. The distance between the walls is larger than the size of the locking portion in the circumferential direction of the main body, and when the locking portion is attached to the connecting member, the load transmitting portion is provided. When attached to the outer peripheral surface of the main body, the connecting device is located below the main body, and the main body is thermally expanded, the locking portion is in non-contact with the outer peripheral surface of the main body. The load transmitting portion is non-contact with the connecting member, and when the locking portion is attached to the outer peripheral surface of the main body, the load transmitting portion is attached to the connecting member, and the connecting device is under the main body. It is located on the side and when the main body is thermally expanded, the locking portion is non-contact with the connecting member and the load transmitting portion is non-contact with the outer peripheral surface of the main body. It shall be a rotating structure.

The locking portion has a configuration in which flat wall surfaces are provided on both ends in the circumferential direction of the main body, and the load transmitting portion includes a gap between the wall and the wall surface of the locking portion. It is configured to have a configuration in which they are arranged so as to face each other.

The load transmitting portion has a configuration in which both ends of the wall are connected to each other by a wall along a plane perpendicular to the axial direction of the main body .

The main body is a furnace body having a peripheral wall formed into a cylindrical shape by a furnace wall pipe arranged at intervals set in the circumferential direction and fins attached between adjacent furnace wall pipes. The annular body is a tire arranged on the outer periphery of the furnace body, and the locking portion or the load transmission portion attached to the outer peripheral surface of the furnace body is a plurality of furnace wall pipes and a plurality of furnace wall pipes on the peripheral wall of the furnace body. It is configured to include leg members that come into contact with the outer surfaces of a plurality of fins.

According to the rotating structure of the present invention, a connecting device provided between a cylindrical main body arranged sideways and an annular body arranged on the outer periphery of the main body is provided, and thermal expansion occurs in the main body and the annular body. The difference can be absorbed regardless of the bending deformation of the member, and the durability of the connecting device can be improved.

It is a schematic side view which shows the embodiment of a rotating structure. It is the AA direction arrow view of FIG. It is an enlarged view of the arrow in the BB direction of FIG. It is a figure which shows the enlarged view of the connecting device in the state which is located below the furnace body. It is a figure which shows the main part of the coupling device of FIG. 4 further enlarged. It is an enlarged view which shows the coupling device in the state which is located to the side of the furnace body. It is a schematic perspective view which shows the load transmission part in the coupling device in an enlarged manner.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

1 to 7 show an example of an embodiment of the rotary structure of the present invention applied to a rotary structure including a furnace body and a tire in a rotary stoker type incinerator.

FIG. 1 is a schematic side view showing a rotating structure of the present embodiment. FIG. 2 is a view taken along the line AA of FIG. 1, and FIGS. 2 (a) and 2 (b) are views showing an example in which the numbers arranged in the circumferential direction of the coupling device are different from each other. FIG. 3 is an enlarged view of FIG. 1 in the BB direction.

FIG. 4 is an enlarged view of the connecting device located below the furnace body, and FIG. 4A is a view seen from one side in the axial direction of the furnace body by cutting a part thereof. 4 (b) is a view taken along the line CC of FIG. 4 (a). FIG. 5 is a further enlarged view showing a main part of the coupling device in FIG. 4 (a). FIG. 6 is an enlarged view showing the connecting device in a state of being located on the side of the furnace body, and is a diagram corresponding to FIG. 4 (a). FIG. 7 is a schematic perspective view showing a load transmission unit in the coupling device.

The rotating structure of the present embodiment is shown by reference numeral 1 in FIGS. 1 and 2 (a) and 2 (b), and is a cylindrical main body arranged sideways and an annular body arranged on the outer periphery of the main body. For example, a cylindrical furnace body 2 in a rotary stoker type incinerator and tires 3 arranged on the outer circumferences of two places near both ends in the axial direction of the furnace body 2 are provided. Further, the rotary structure 1 of the present embodiment is connected between the furnace body 2 as a cylindrical main body and the tire 3 as an annular body so that the furnace body 2 and the tire 3 rotate together. The configuration is provided with a connecting device 4 having a function of absorbing the difference in thermal expansion between the furnace body 2 and the tire 3.

As shown in FIGS. 1 and 3, the furnace body 2 has a pair of ring-shaped header pipes 5 and 6 coaxially arranged at a set interval, and a circumferential direction between the header pipes 5 and 6. It is formed into a cylindrical shape by a plurality of furnace wall pipes 7 arranged at intervals set in 1 and fins 8 attached between adjacent furnace wall pipes 7. Therefore, the peripheral wall 9 of the furnace body 2 has a configuration in which the furnace wall pipes 7 and the fins 8 are alternately arranged. The fin 8 is provided with an air hole (not shown).

As shown in FIGS. 2A and 2B, the tire 3 is configured to have an inner diameter larger than the outer diameter of the furnace body 2 by a set dimension. As a result, a gap 10 is formed over the entire circumference in the circumferential direction between the outer peripheral surface of the peripheral wall 9 of the furnace body 2 and the inner peripheral surface of the tire 3 arranged on the outer peripheral surface thereof. Therefore, in the rotary structure 1 of the present embodiment, the circumferential direction of the furnace body 2, the circumferential direction of the tire 3, and the circumferential direction of the gap 10 are basically the same direction, and the axis of the furnace body 2 The direction of the center and the direction of the axis of the tire 3 are basically the same. In addition, in FIGS. 2A and 2B, for convenience of illustration, the peripheral wall 9 of the furnace body 2 is simplified and shown as a simple cylindrical structure by omitting the description of the furnace wall tube 7 and the fins 8. (The same applies to FIGS. 4 (a), 5, 6, and 7 described later).

As shown in FIGS. 2A and 2B, a plurality of coupling devices 4 are provided in a plurality of arrangements in the circumferential direction in the gap 10 between the furnace body 2 and the tire 3. FIG. 2A shows a configuration example including eight coupling devices 4 in the circumferential direction as an example, and FIG. 2B shows a configuration including ten coupling devices 4 in the circumferential direction as an example. An example is shown. It goes without saying that the number of connecting devices 4 provided in the gap 10 in the circumferential direction may be appropriately set to a number other than those shown in the drawings according to the size and weight of the furnace body 2, and is also an even number. Of course, the number is not limited to an odd number and may be an odd number.

Next, a specific configuration of the coupling device 4 will be described.

As shown in FIGS. 4A and 4B, the connecting device 4 includes a bracket 12, a connecting member 13, and a locking portion 14 attached to the inner peripheral surface of the tire 3, and a peripheral wall 9 of the furnace body 2. It is configured to include a load transmitting portion 11 attached to the outer peripheral surface of the tire.

Brackets 12 are arranged inside the tire 3 in a range corresponding to an angle corresponding to the angle obtained by dividing 360 degrees by the number of arrangements in the circumferential direction of the connecting device 4, and are arranged between the brackets 12 along the chord direction of the tire 3. An extending connecting member 13 is arranged.

Both ends of the connecting member 13 in the longitudinal direction are attached to brackets 12 provided on the inner peripheral surface of the tire 3 by bolts 15 and nuts 16 along the axial direction of the tire 3. As a result, in the connecting device 4, when the load acting from the furnace body 2 is transmitted to the tire 3 as described later, when the connecting member 13 is bent in the bending direction, the end portion of the connecting member 13 is centered on the bolt 15. The angle changes with respect to the bracket 12. Therefore, excessive stress is not generated at the connecting portion between the connecting member 13 and the bracket 12.

A locking portion 14 is attached to the intermediate portion of the connecting member 13 in the longitudinal direction in a posture of projecting toward the center of the tire 3.

As shown in FIG. 5, the locking portion 14 is configured to have flat wall surfaces 17a and 17b on both ends in a direction along the circumferential direction of the tire 3. The wall surfaces 17a and 17b are arranged substantially parallel to a plane along the radial direction of the tire 3 and the axial direction of the tire 3. The locking portion 14 is configured to include such wall surfaces 17a and 17b because, as will be described later, when the locking portion 14 receives a load from the load transmitting portion 11, the locking portion 14 and the load transmitting portion 11 are provided. This is to avoid stress concentration by increasing the contact area with.

In the present embodiment, as shown in FIG. 4B, the locking portion 14 has a flat wall surface in which both ends of the locking portion 14 in the axial direction of the tire 3 are arranged perpendicular to the axial direction of the tire 3. It is said to be 18a and 18b. Therefore, the locking portion 14 in the present embodiment has a rectangular outer shape.

From the viewpoint of making the locking portion 14 replaceable, it is preferable that the locking portion 14 is attached to an intermediate portion in the longitudinal direction of the connecting member 13 with bolts and nuts. Of course, the structure may be fixed to the connecting member 13 by the fixing means.

As shown in FIGS. 4A and 5, the load transmitting portion 11 is arranged to face the wall surfaces 17a and 17b of the locking portion 14 provided on the tire 3 side, respectively, and is arranged along the axial direction of the furnace body 2. It is configured to have a pair of walls 19a and 19b extending from the wall.

At this time, as shown in FIG. 5, the distance a between the wall 19a and the wall 19b in the load transmitting portion 11 is a set dimension relative to the distance b from the wall surface 17a to the wall surface 17b of the locking portion 14. , Set to large dimensions. As a result, the connecting device 4 is configured to have a gap in the circumferential direction of the furnace body 2 between the load transmitting portion 11 and the locking portion 14 arranged inside the load transmitting portion 11.

Further, in the present embodiment, as shown in FIG. 7, the load transmission unit 11 has a wall 20a and a wall 20b along a plane perpendicular to the axial direction of the furnace body 2 so that both ends of the wall 19a and the wall 19b are connected to each other. It is a connected configuration. Therefore, the load transmission unit 11 in the present embodiment has a square cylindrical structure extending along the radial direction of the furnace body 2. As described above, the structure of the load transmitting portion 11 in the shape of a square cylinder allows the load received by either the wall 19a or the wall 19b to be applied to the wall 19a or the wall 19b via the walls 20a or 20b. Since it can be transmitted and received, it is an advantageous configuration for improving the load bearing performance of the load transmitting unit 11.

The base end side of the load transmitting portion 11 is attached to the outer peripheral surface of the peripheral wall 9 of the furnace body 2.

At this time, although not shown, the load transmitting portion 11 has a concave-convex shape formed on the outer peripheral surface of the peripheral wall 9 of the furnace body 2 by the furnace wall pipe 7 and the fins 8 (see FIG. 3) on the base end side. As a configuration having a complementary uneven shape, it may be attached to the outer peripheral surface of the peripheral wall 9 in a state of being in contact with the outer surfaces of the furnace wall tube 7 and the fin 8.

Further, in the present embodiment, the distance c between the wall 20a and the wall 20b in the load transmitting portion 11 (see FIG. 7) and the distance d from the wall surface 18a to the wall surface 18b of the locking portion 14 (see FIG. 4B) are , It is set as follows.

That is, the furnace body 2 is deformed to extend in the axial direction due to thermal expansion due to the temperature change from the state of normal temperature to the operation of the rotary stoker type incinerator.

On the other hand, the rotary structure 1 of the present embodiment is used in a state where the tire 3 is mounted on the upper side of the rotary support device 21 such as the roller shown by the two-dot chain line in FIGS. 1 and 2 (a) and 2 (b). However, there is a large friction between the tire 3 and the rotation support device 21 due to the weight of the rotating structure 1 of the present embodiment and the weight of the fuel and other combustion objects charged inside the furnace body 2. Force acts. Therefore, the tire 3 does not cause a relative displacement in the axial direction with respect to the rotation support device 21.

Therefore, in each of the connecting devices 4 arranged at two locations near both ends in the axial direction of the furnace body 2, the axis of the furnace body 2 is relative to the tire 3 whose position is fixed according to the arrangement of the rotation support device 21. There is a need for a function that allows elongation deformation due to thermal expansion in the central direction.

Although not shown, the furnace body 2 is usually provided with a restraining device for restraining the free movement of the furnace body 2 in the axial center direction at one place in the axial center direction.

Therefore, in the connecting device 4, the value of the difference (cd) between the distance c between the wall 20a and the wall 20b in the load transmitting portion 11 and the distance d from the wall surface 18a to the wall surface 18b of the locking portion 14 is the furnace body. It is set so as to be equal to or greater than the amount of elongation deformation due to thermal expansion assumed in the portion located between the restraining device and the mounting position of the connecting device 4 in 2. Even if either one of the connecting device 4 attached to one end in the axial direction of the furnace body 2 or the connecting device 4 attached to the other end in the axial direction also serves as the restraining device. Of course, it's good.

As shown in FIGS. 1 and 2 (a) and 2 (b), the rotary structure 1 of the present embodiment is used by mounting the tire 3 on the upper side of the rotary support device 21. Therefore, since the tire 3 is supported from below by the rotation support device 21, the vertical displacement is prevented. On the other hand, the furnace body 2 is supported inside the tire 3 via the connecting device 4, and at this time, the furnace body 2 tends to be displaced downward as much as possible due to gravity. Therefore, the gap 10 between the furnace body 2 and the tire 3 is the narrowest on the lower end side in the circumferential direction and the widest on the upper end side.

Further, when the furnace body 2 thermally expands and the diameter dimension of the furnace body 2 increases with the operation of the rotary stoker type incinerator, the difference in thermal expansion from the tire 3 becomes large, so that the furnace body becomes larger than that at room temperature. The gap 10 between 2 and the tire 3 becomes narrower.

In view of this point, the coupling device 4 is locked even when the furnace body 2 is in a state of thermal expansion and is located on the lower end side in the circumferential direction as shown in FIG. The protruding end of the portion 14 does not come into contact with the peripheral wall 9 of the furnace body 2 on the inner side of the load transmitting portion 11, and the protruding end of the load transmitting portion 11 in the outer peripheral direction is the connecting member 13. The arrangement and dimensions of each part and the clearance between each part are set so that they do not come into contact with.

Further, although not shown, the coupling device 4 may be located on the upper end side in the circumferential direction when the furnace body 2 is in a normal temperature state, that is, in a state where the furnace body 2 is contracted. The arrangement and dimensions of the locking portion 14 and the load transmitting portion 11 are set so that the state in which the tip end side of the locking portion 14 is inserted into the load transmitting portion 11 is maintained.

Therefore, when the rotating structure 1 of the present embodiment is manufactured, the connecting member 13 and the locking portion 14 provided on the tire 3 side and the load transmitting portion 11 provided on the furnace body 2 side are provided in the connecting device 4. Alignment is important.

Therefore, in the present embodiment, the connecting member 13 in the connecting device 4 is attached to the intermediate member 22 to which the locking portion 14 is pre-attached and the bracket 12, for example, as shown in FIGS. 4A and 4B. It is configured to include two end members 23 having bolt insertion holes (not shown) for mounting.

On both ends of the intermediate member 22 in the longitudinal direction, elongated holes (not shown) along the longitudinal direction of the connecting member 13 are provided, and before the installation of the connecting member 13, each end member 23 is bolted and nutted in the elongated holes. Loosely fix with.

Further, a position adjusting device 24 is provided between the intermediate member 22 and each end member 23 for adjusting the relative position of the connecting member 13 in the longitudinal direction by utilizing the tightening force of the bolt and the nut. It shall be configured.

The connecting member 13 having the above configuration is attached to each of the two corresponding brackets 12 when the connecting device 4 is constructed with the gap 10 between the furnace body 2 and the tire 3 at the manufacturing site of the rotating structure 1 of the present embodiment. Attach the end member 23. Next, in the connecting member 13, the position adjusting device 24 is used to align the locking portion 14 and the intermediate member 22 in accordance with the load transmitting portion 11 previously attached to the furnace body 2, and then the connecting member 13 is aligned. The intermediate member 22 and each end member 23 may be fixed by bolts and nuts. Further, the intermediate member 22 and each end member 23 may be fixed by welding.

Therefore, in the present embodiment, the coupling device 4 can easily align the connecting member 13 and the locking portion 14 provided on the tire 3 side with the load transmitting portion 11 provided on the furnace body 2 side at the site. be able to.

In addition, in FIGS. 4 (a) and 4 (b), in the connecting device 4, the intermediate member 22 is a flat plate-like member arranged parallel to the axial direction of the furnace body 2, and each end member 23 is the intermediate member 22. It has a shape in which both ends in the longitudinal direction are sandwiched from both sides in the radial direction of the furnace body 2, and the intermediate member 22 and each end member 23 are connected by bolts and nuts in the radial direction of the furnace body 2. An example is shown. However, it goes without saying that the shape and the connecting structure of the intermediate member 22 and each end member 23 in the connecting device 4 may be a shape or a connecting structure other than those shown in FIGS. 4A and 4B. For example, although not shown, each end member 23 is a flat plate-shaped member arranged along a plane perpendicular to the axial direction of the furnace body 2, and the intermediate member 22 has an end portion of each end member 23 as a furnace body. It is a member having a shape sandwiched from both sides in the axial direction of 2, and even if the intermediate member 22 and each end member 23 are connected by bolts and nuts in the direction along the axial direction of the furnace body 2. good.

Further, as shown in FIG. 4B, it is preferable that the connecting devices 4 adjacent to each other in the circumferential direction share a bracket 12 provided on the inner peripheral surface of the tire 3 to attach the connecting member 13. In this case, the coupling devices 4 arranged in the circumferential direction may be arranged in a staggered manner in which the arrangement in the axial direction of the furnace body 2 is alternately shifted. By doing so, the number of brackets 12 provided on the inner peripheral surface of the tire 3 can be reduced, and the tire 3 can be reinforced by the connecting members 13 arranged like strings over the entire circumference. .. Of course, the coupling devices 4 arranged in the circumferential direction may be configured to include individual brackets 12.

In FIG. 1, reference numeral 25 denotes a ring-shaped gear (sprocket) arranged on the outer periphery of the furnace body 2 near one end in the axial direction and attached to the side surface of the tire 3, and the gear 25 is a drive device (not shown). The rotary structure 1 of the present embodiment is rotationally driven by being rotationally driven via the chain.

When constructing a rotary stoker type incinerator using the rotary structure 1 of the present embodiment having the above configuration, the furnace body 2 is placed on the outlet side of the header pipe 5 on the inlet side. The header pipe 6 is tilted and placed horizontally so that it is lower, and the tire 3 is placed on the rotation support device 21. Further, although not shown, the furnace body 2 is arranged in the cover casing, and a wind box communicating with the lower end of the cover casing is provided at the lower position of the furnace body 2. Further, boiler water is circulated and circulated in each furnace wall pipe 7 of the furnace body 2. A dust feeder may be provided on the inlet side of the furnace body 2.

In the rotating structure 1 of the present embodiment, when the connecting device 4 is arranged laterally from diagonally above to diagonally below the furnace body 2, as shown in FIG. 6, a pair of walls of the load transmitting portion 11 Of the 19a and the wall 19b, the wall 19a or the wall 19b arranged above the locking portion 14 is placed on the upper side of the corresponding wall surface 17a or the wall surface 17b of the locking portion 14 by gravity. FIG. 6 shows a state in which the wall 19a of the load transmitting portion 11 is placed on the upper side of the wall surface 17a of the locking portion 14.

Although not shown, in the connecting device 4 located on the opposite side of the furnace body 2, the wall 19b of the load transmitting portion 11 is placed on the upper side of the wall surface 17b of the locking portion 14. ..

Further, in the connecting device 4 located diagonally above or diagonally below the furnace body 2, although the arrangement is inclined, the wall 19a or the wall 19b of the load transmitting portion 11 is the corresponding wall surface 17a of the locking portion 14. Alternatively, it is placed on the upper side of the wall surface 17b.

In this state, the load due to the weight of the furnace body 2 and the weight of the object charged inside the furnace body 2 is applied to the walls 19a and 19b and the wall surfaces 17a and 17b in contact with each other from the load transmission unit 11. It is transmitted to the locking portion 14 via the coupling member 13, and further transmitted to the tire 3 via the connecting member 13 and the bracket 12 to be received. Therefore, the furnace body 2 is held inside the tire 3 via each connecting device 4.

Further, when the tire 3 is rotationally driven in this state, the coupling device 4 that supports the furnace body 2 by transmitting the load of the furnace body 2 to the tire 3 on one side of the furnace body 2 as described above. The position rises, and on the other side of the furnace body 2, the position of the coupling device 4 that also supports the furnace body 2 descends. Therefore, the furnace body 2 is rotationally driven by the movement of the coupling device 4 that moves in the circumferential direction by the rotational drive of the tire 3.

Further, during the operation of the rotary stoker type incinerator, the furnace body 2 is affected by the heat of combustion and thermally expands, and the diameter dimension increases. Therefore, due to the difference in thermal expansion from the tire 3, the furnace body 2 and the furnace body 2 The size of the gap 10 with the tire 3 is reduced. This decrease in the size of the gap 10 is absorbed by the change in the amount of insertion of the locking portion 14 with respect to the load transmitting portion 11 in each connecting device 4. In this way, even if the relative insertion amount of the locking portion 14 with respect to the load transmitting portion 11 changes, in the connecting device 4, the walls 19a and 19b of the load transmitting portion 11 in contact with each other and the locking portion Only the contact areas of the wall surfaces 17a and 17b of 14 change, and the function of transmitting the load acting from the furnace body 2 to the tire 3 to support it and the function of transmitting the rotation of the tire 3 to the furnace body 2 do not change at all.

Therefore, according to the rotating structure 1 of the present embodiment, the connecting device 4 measures the difference in thermal expansion generated between the furnace body 2 and the tire 3 by the load transmission unit 11, the bracket 12, and the connecting member constituting the connecting device 4. It can be absorbed regardless of the bending deformation of either the 13 or the locking portion 14. Therefore, even if the thermal expansion difference is repeatedly generated between the furnace body 2 and the tire 3, fatigue due to bending deformation occurs in the load transmitting portion 11, the bracket 12, the connecting member 13, and the locking portion 14 in the connecting device 4. Can be suppressed. Therefore, the rotating structure 1 of the present embodiment can improve the durability of the connecting device 4 provided between the furnace body 2 and the tire 3.

The present invention is not limited to the above embodiment, and includes the furnace body 2, the tire 3, the connecting device 4, each component of the furnace body 2, and each component of the connecting device 4 shown in each figure. The shape, size, and dimensional ratio are for convenience of illustration and do not reflect the actual shape, size, or dimensional ratio.

In the above embodiment, the connecting device 4 exemplifies a configuration including an intermediate member 22, two end members 23, and a position adjusting device 24, but the connecting device 4 extends in a direction along the chord of the tire 3 and has brackets on both ends in the longitudinal direction. As long as the tire 3 can be attached to the tire 3 via the 12 and the locking portion 14 is attached to the intermediate portion in the longitudinal direction, it is of course possible to use a configuration other than the one shown in the figure. For example, a rod-shaped member or a flat plate-shaped member extending in the direction along the chord of the tire 3, or a member in which the rod-shaped or flat plate-shaped member is reinforced by ribs may be used.

The load transmission portion 11 of the coupling device 4 may have a configuration including walls 19a and 19b arranged so as to sandwich the locking portions 14 provided on the tire 3 side from both sides in the circumferential direction of the furnace body. , The walls 20a and 20b on both sides in the axial direction of the furnace body 2 may be configured by omitting one or both of them.

If the locking portion 14 of the coupling device 4 can be arranged between the walls 19a and 19b inside the load transmitting portion 11, both ends of the locking portion 14 in the axial direction of the tire 3 are flat. It does not have to be the wall surfaces 18a and 18b.

Further, the load transmitting portion 11 and the locking portion 14 are portions in which the load transmitting portion 11 is arranged on the upper side of the locking portion 14 when the connecting device 4 is arranged on any side of the furnace body 2. It suffices to have a structure in which a part of the load transmitting portion 11 arranged on the upper side of the locking portion 14 is mounted on the locking portion 14. Therefore, in the coupling device 4, for example, the locking portion 14 is a prism, a cylinder, or an elliptical pillar along the radial direction of the tire, and the load transmission portion 11 is a square, circular, or elliptical shape that surrounds the periphery of the locking portion 14. It may be used as a frame.

Further, in the connecting device 4, the locking portion 14 is attached to the outer peripheral surface of the peripheral wall 9 of the furnace body 2, and the load transmitting portion 11 provided with the walls 19a and 19b is attached to the inside of the tire 3 via the connecting member 13 and the bracket 12. It may be configured to be attached to the peripheral surface side. In this case, even if the connecting device 4 is placed under the furnace body 2 when the furnace body 2 is thermally expanded, the connecting device 4 can transmit the load to the protruding end portion of the locking portion 14. A gap is maintained between the connecting member 13 on the inner side of the portion 11 and the end portion of the load transmitting portion 11 on the protruding side in the inner peripheral direction comes into contact with the outer peripheral surface of the peripheral wall 9 of the furnace body 2. The arrangement and dimensions of each part and the clearance between each part may be set so that there is no such thing.

The present invention includes a cylindrical main body arranged sideways and an annular body arranged on the outer periphery of the main body so that the main body and the annular body rotate together between the main body and the annular body. If it is a rotary structure of the type that is connected and has a function of absorbing the difference in thermal expansion between the two, for example, a kiln furnace for combustion or firing, a rotary carbonizer, or a horizontal drum type. Of course, it may be applied to a rotating structure other than a rotating stoker furnace such as a drying device.

Of course, various other changes can be made without departing from the gist of the present invention.

2 furnace body (main body), 3 tires (annular body), 4 coupling device, 7 furnace wall tube, 8 fins, 9 peripheral walls, 11 load transmission section, 13 coupling member, 14 locking section, 17a, 17b wall surface, 19a, 19b wall, 20a, 20b wall

Claims (4)

A cylindrical body placed sideways in a furnace or dryer that incinerates waste, and
An annular body arranged on the outer circumference of the main body with a gap,
A coupling device provided between the main body and the annular body and absorbing the difference in thermal expansion between the main body and the annular body is provided.
The connecting device is
A connecting member extending along the chord of the annular body and having both ends attached to the annular body.
A locking portion arranged at a position corresponding to the central portion in the longitudinal direction of the connecting member and attached to either the outer peripheral surface of the main body or the connecting member.
The locking portion is provided with walls arranged at positions on both sides of the main body in the circumferential direction, and the outer peripheral surface of the main body and the load transmitting portion attached to either one of the connecting members are provided. Prepare,
The distance between the walls is larger than the circumferential size of the main body at the locking portion.
When the locking portion is attached to the connecting member, the load transmitting portion is attached to the outer peripheral surface of the main body, the connecting device is located under the main body, and the main body is thermally expanded. When the locking portion is present, the locking portion is non-contact with the outer peripheral surface of the main body and the load transmitting portion is non-contact with the connecting member .
When the locking portion is attached to the outer peripheral surface of the main body, the load transmission portion is attached to the connecting member, the connecting device is located under the main body, and the main body is thermally expanded. When is present, the locking portion is non-contact with the connecting member and the load transmitting portion is non-contact with the outer peripheral surface of the main body .
A rotating structure characterized by that. The locking portion has a configuration in which flat wall surfaces are provided on both ends in the circumferential direction of the main body.
The rotating structure according to claim 1, wherein the load transmitting portion has a structure in which the wall is arranged so as to face each other with a gap between the wall and the wall surface of the locking portion. The rotating structure according to claim 1 or 2, wherein the load transmitting portion has a structure in which both ends of the wall are connected to each other by a wall along a plane perpendicular to the axial direction of the main body. The main body is a furnace body having a peripheral wall formed into a cylindrical shape by means of furnace wall pipes arranged at intervals set in the circumferential direction and fins attached between adjacent furnace wall pipes.
The annular body was a tire arranged on the outer periphery of the furnace body.
The rotating structure according to any one of claims 1 to 3.

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