JP6647016B2 - Boiler support, boiler device and ship - Google Patents

Description

  The present disclosure relates to a boiler support, a boiler device, and a ship.

  For example, a so-called package boiler, which is a factory-completed product giving priority to a compact structure, is generally used for a boiler used in an environment where installation space is greatly restricted, such as a marine boiler mounted on a ship.

  Such a boiler is configured as a self-standing boiler having a self-supporting leg at the bottom so that it can be easily transported from a factory to the site and installed.

  Patent Literature 1 discloses a self-standing boiler having an inclined bottom surface. The self-supporting boiler of Patent Document 1 is provided with slide support legs that slide in the direction of inclination of the bottom surface so as to allow thermal expansion of the boiler.

JP 2014-1878 A

  According to the slide support leg (boiler support base) described in Patent Literature 1, it is possible to absorb the thermal expansion of the support portion of the slide support leg in the sliding direction (the inclination direction of the bottom surface of the boiler). The ratio of the horizontal component to the vertical component in the amount of movement of the support portion of the slide support leg is fixed. For this reason, the ratio between the vertical component and the horizontal component of the allowable amount of thermal elongation is also fixed, and it is not possible to absorb three-dimensional thermal elongation including a direction deviating from the inclined surface, thereby reducing thermal stress. The effect was limited.

  The present invention has been made in view of the above-described conventional problems, and has as its object to provide a boiler support base capable of reducing the thermal stress of a boiler, and a boiler apparatus and a ship including the same.

  (1) A boiler supporter according to at least one embodiment of the present invention is a boiler supporter that supports a boiler, wherein a first load receiving portion that receives a load of the boiler, and the first load receiving portion is placed on a horizontal plane. A horizontal support device having a horizontal support surface slidably supported along, a second load receiving portion receiving the load of the boiler, and an inclined surface intersecting the second load receiving portion with a horizontal plane An inclined support portion having an inclined support surface that is slidably supported along, and an inclined support device provided vertically adjacent to the horizontal support device.

  According to the boiler support according to the above (1), the first load receiving portion slides along the horizontal plane to reduce the thermal expansion in the direction along the horizontal plane (the direction obtained by combining the front-rear direction and the left-right direction). It can be tolerated by a horizontal support device. Further, the second load receiving portion slides along the inclined surface, so that the inclined support device can allow thermal expansion in a direction along the inclined surface (a direction obtained by combining the front-rear direction, the left-right direction, and the vertical direction). it can.

  For this reason, the combined deformation of the sliding of the first load receiving portion along the horizontal plane and the sliding of the second load receiving portion along the inclined surface effectively absorbs the thermal deformation of the boiler and reduces the thermal stress. Can be reduced. Therefore, as compared with a slide support leg that slides along one surface as described in Patent Document 1, it absorbs three-dimensional thermal deformation that deviates from the one surface and reduces thermal stress. It can be reduced effectively.

  As a configuration for absorbing the three-dimensional thermal deformation as described above, a configuration in which a horizontal support device having a horizontal slide mechanism is supported by a spring structure such as a spring hanger that expands and contracts in a vertical direction may be considered. However, in this case, as an adverse effect of adopting the spring structure, the size of the boiler support base and the reduction in load resistance are likely to occur. Further, the structure becomes complicated, and the installation location is restricted by the specification of the spring determined according to the load condition to be supported. In addition, adjustment and assembling work are required on site, and it cannot be shipped as a finished product.

  In this regard, according to the boiler support, since the three-dimensional thermal deformation can be absorbed as described above without employing a spring structure, the structure can be simplified and the size can be reduced, and the components can be reduced. Points can be reduced. Further, on-site adjustment and assembling are not required, and it is possible to obtain a finished product in a form as shipped from the factory.

  When the boiler support is a boiler support for supporting a marine boiler, the boiler itself and the boiler support itself may be tilted as the hull sways on the water. In this case, the concept indicating directions such as “horizontal”, “vertical”, and “inclination” described in this specification is defined based on a state in which the hull is not inclined.

  (2) In some embodiments, in the boiler support according to (1), the inclined support device is configured to support the horizontal support device adjacent to a lower side of the horizontal support device. The second load receiving portion is configured to receive the load of the boiler via the horizontal support device.

  (3) In some embodiments, in the boiler support according to (1), the horizontal support device is configured to support the inclined support device adjacent to the inclined support device on a lower side. The first load receiving portion is configured to receive the load of the boiler via the inclined support device.

  (4) In some embodiments, in the boiler support according to (1), the boiler includes a furnace provided with a main burner, a water drum, a steam drum, the water drum, and the steam drum. A reheat furnace provided with a reheat burner positioned downstream of the evaporative tube group in a flow direction of combustion gas generated by combustion by the main burner; The water drum is supported by a support stand different from the boiler support stand, and the boiler support stand supports a bottom portion of the reheating furnace formed to project downward with respect to the water drum. It is configured as follows.

  In a boiler having a reheat furnace downstream of the evaporator tube, the bottom of the reheat furnace must be installed so that the reheat burner is not easily affected by the flow of the combustion gas from the main burner. , May protrude downward with respect to the water drum. In this case, the distance between the bottom of the water drum and the bottom of the reheating furnace changes not only in the horizontal direction but also in the vertical direction due to thermal expansion. Even in such a case, the bottom of the reheat furnace is supported by the boiler support according to (1), so that the first load receiving portion slides along the horizontal plane and the second load receiving portion along the inclined surface. The combined movement in combination with the slide of the section can effectively absorb the thermal deformation of the boiler and reduce the thermal stress.

  (5) In some embodiments, in the boiler support according to (4), the bottom of the reheat furnace includes a bottom header provided at a position lower than the water drum, and the boiler support Are configured to support the bottom header.

  According to the boiler support described in (5), in the boiler support described in (4), the relative position between the bottom header provided in the reheating furnace and the water drum is three-dimensionally increased by thermal expansion. Even if it changes, by supporting the bottom of the reheat furnace by the boiler support described in (1) above, the first load receiving portion slides along the horizontal plane and the second load along the inclined surface. The combined movement of the boiler in combination with the slide of the receiving portion can effectively absorb the thermal deformation of the boiler and reduce the thermal stress.

  (6) In some embodiments, in the boiler support according to (5), the water drum of the boiler is supported by a support different from the boiler support, and the bottom header includes: The inclined support surface is extended along the axial direction of the water drum, and the inclined support surface, when viewed in the axial direction of the water drum, includes a support point of the water drum by the support base that supports the water drum and the boiler support. It is formed along a line parallel to a straight line connecting the support point of the bottom header with the base.

  According to the boiler support according to the above (6), the inclined support surface is formed along a line parallel to a straight line connecting the support point of the water drum and the support point of the bottom header by the boiler support. The second load receiving portion can be slid with respect to the inclined support surface along the extension direction, and the thermal stress can be effectively reduced.

  (7) In some embodiments, in the boiler support according to (6), in the axial direction of the water drum, the inclined support surface is provided at a position where the water drum is supported by the water drum support. The boiler support is formed in parallel with a straight line connecting to the support point of the bottom header by the boiler support.

  According to the boiler support according to the above (7), the inclined support surface is formed in parallel to a straight line connecting the support point of the water drum and the support point of the bottom header by the boiler support, so that the boiler support extends in the thermal elongation direction. As a result, the second load receiving portion can be slid with respect to the inclined support surface, and the thermal stress can be effectively reduced.

  (8) In some embodiments, in the boiler support according to (6), an angle θ1 between the inclined support surface and the vertical line when viewed in the axial direction of the water drum is the water drum support. Is smaller than an angle θ2 formed by a vertical line and a straight line connecting the support point of the water drum and the support point of the bottom header by the boiler support.

  According to the boiler support according to (8), when the inclined support surface is formed such that the angle θ1 is smaller than the angle θ2, the total amount of loads applied to the horizontal support device and the inclined support device is reduced. It can be reduced effectively. This is because, during the thermal elongation process, the sliding of the second load receiving portion obliquely downward along the inclined support surface is more gravitational than the sliding of the first load receiving portion leftward along the horizontal support surface. This is because it is likely to be caused by contribution. In the thermal elongation process, when the second load receiving portion slides along the inclined support surface to a position corresponding to the amount of thermal elongation in the vertical direction, the second load receiving portion may move in the horizontal direction depending on the inclination angle of the inclined support surface. It may move to the left more than the thermal elongation. In this case, when the first load receiving portion slides rightward, the first load receiving portion moves to a position corresponding to the amount of thermal elongation in the left-right direction. However, the first load receiving portion and the second load receiving portion move in the left-right direction. Since it moves in the opposite direction, an inefficient sliding operation occurs in absorbing thermal elongation, and the total amount of load applied to the horizontal support device and the inclined support device increases (the amount of slide increases. In addition, the configuration of the device is increased).

  In this regard, by making the angle θ1 smaller than the angle θ2 as in the boiler support described in (8) above, the second load receiving portion slides obliquely downward along the inclined support surface during the thermal elongation process. Therefore, even when the thermal expansion in the vertical direction is preferentially absorbed, the phenomenon that the second load receiving portion moves to the left more than the thermal expansion amount in the horizontal direction is less likely to occur. Therefore, by suppressing the occurrence of the phenomenon in which the first load receiving portion and the second load receiving portion move in opposite directions in the left-right direction, thermal expansion is efficiently absorbed, and the load applied to the horizontal support device and the inclined support device is reduced. Can be effectively reduced (an increase in the slide amount can be suppressed, and an increase in the size of the device configuration can be suppressed).

(9) In some embodiments, in the boiler support according to (2), the horizontal support portion and the second load receiving portion have an integral structure in which a relative position between the two does not change. .
For example, when each of the horizontal support portion and the second load receiving portion is made of a metal material, both may have an integrated structure by welding or the like.

  (10) In some embodiments, in the boiler support according to (3), the inclined support portion and the first load receiving portion have an integrated structure in which a relative position between the two does not change. . For example, when each of the inclined support portion and the first load receiving portion is made of a metal material, both may have an integrated structure by welding or the like.

  (11) In some embodiments, in the boiler support according to (1), the first load receiving portion has an upper horizontal plate portion extending along a horizontal plane and having a bolt hole formed therein. The horizontal support portion has a lower horizontal plate portion having a bolt hole formed therein while supporting the upper horizontal plate portion adjacent to a lower side of the upper horizontal plate portion. The upper surface of the lower horizontal plate portion, wherein the horizontal support device is inserted through a bolt hole provided in the upper horizontal plate portion and a bolt hole provided in the lower horizontal plate portion. A horizontal plate bolt for connecting the portion and the lower horizontal plate portion, at least one of a diameter of a bolt hole of the upper horizontal plate portion and a diameter of a bolt hole of the lower horizontal plate portion. Who is greater than the shaft diameter of the bolt.

  According to the boiler support described in (11), the relative position of the bolt hole with respect to the bolt can be changed along the horizontal plane (in a direction obtained by combining the front-rear direction and the left-right direction). The upper horizontal plate portion can be slid in the horizontal direction along the lower horizontal plate portion while connecting the horizontal plate portion and the lower horizontal plate portion. Therefore, with a simple configuration, the first load receiving portion can be slid along the horizontal plane on the horizontal supporting portion while connecting the first load receiving portion and the horizontal support portion.

  (12) In some embodiments, in the boiler support according to (1), the second load receiving portion extends along the inclined surface and has an upper inclined plate portion formed with a bolt hole. Wherein the inclined support portion has a lower inclined plate portion that supports the upper inclined plate portion adjacent to a lower side of the upper inclined plate portion and has a bolt hole formed therein, and the inclined support surface has Is an upper surface of the lower inclined plate portion, and the inclined support device is inserted into a bolt hole provided in the upper inclined plate portion and a bolt hole provided in the lower inclined plate portion. Including a bolt for connecting the inclined plate portion and the lower inclined plate portion, at least one of the diameter of the bolt hole of the upper inclined plate portion and the diameter of the bolt hole of the lower inclined plate portion is Larger than the bolt of the shaft diameter.

  According to the boiler support described in (12), the relative position of the bolt hole with respect to the bolt can be changed along the inclined surface (in a direction obtained by combining the front-back direction, the left-right direction, and the up-down direction). The upper inclined plate portion can be slid along the lower inclined plate portion while connecting the upper inclined plate portion and the lower inclined plate portion by using. Therefore, with a simple configuration, the second load receiving portion can be slid along the inclined surface with respect to the inclined support portion while connecting the second load receiving portion and the inclined support portion.

  (13) A boiler device according to at least one embodiment of the present invention includes a boiler and the boiler support according to any one of (1) to (12).

  According to the boiler apparatus described in the above (13), the boiler support according to any one of the above (1) to (12) is provided, so that the thermal deformation of the boiler is effectively absorbed, and the thermal stress is reduced. Therefore, damage to the boiler can be suppressed, and the boiler device can be operated stably.

  (14) A ship according to at least one embodiment of the present invention is a ship including the boiler device according to (13).

  According to the ship described in (14), since the boiler device described in (13) is provided, damage to the boiler can be suppressed, and the boiler device can be operated stably.

  According to at least one embodiment of the present invention, there is provided a boiler support base capable of effectively reducing thermal stress of a boiler, and a boiler device and a ship including the same.

It is a sectional view showing the schematic structure of boiler device 100 concerning one embodiment. It is a top view which shows the example of arrangement | positioning of the boiler support base 4,6,8 concerning one embodiment, and the sliding direction of the boiler support base 4,6,8 accompanying thermal expansion. It is a figure showing the partial composition of boiler device 100 in the axial direction of water drum 14 concerning one embodiment. It is a perspective view showing the partial composition of boiler device 100 concerning one embodiment. It is an exploded perspective view of boiler support stand 8 (8R, 8F) concerning one embodiment. It is a figure showing the partial composition of boiler device 100 in the axial direction of water drum 14 concerning one embodiment. It is sectional drawing which shows the structure of the connection part of the upper horizontal plate part 58 and the lower horizontal plate part 62 concerning one embodiment. It is sectional drawing which shows the structure of the connection part of the upper horizontal plate part 58 and the lower horizontal plate part 62 concerning one embodiment. It is sectional drawing which shows the structure of the connection part of the upper horizontal plate part 58 and the lower horizontal plate part 62 concerning one embodiment. It is sectional drawing which shows the structure of the connection part of the upper side inclined plate part 72 and the lower side inclined plate part 76 concerning one embodiment. It is sectional drawing which shows the structure of the connection part of the upper side inclined plate part 72 and the lower side inclined plate part 76 concerning one embodiment. It is sectional drawing which shows the structure of the connection part of the upper side inclined plate part 72 and the lower side inclined plate part 76 concerning one embodiment. It is a figure showing the partial composition of boiler device 100 in the axial direction of water drum 14 concerning one embodiment. It is a figure showing the partial composition of the boiler device in the axial direction of water drum 14 concerning a comparative form.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Absent.
For example, relative or absolute such as "in one direction", "along a certain direction", "parallel", "orthogonal", "horizontal", "vertical", "center", "concentric" or "coaxial" The expression representing a proper arrangement not only represents such an arrangement strictly, but also represents a state of being relatively displaced with an angle or a distance such that the same function can be obtained.
For example, expressions such as "identical", "equal", and "homogeneous", which indicate that things are in the same state, not only represent strictly equal states, but also have a tolerance or a difference that provides the same function. An existing state shall also be represented.
For example, the expression representing a shape such as a square shape or a cylindrical shape not only represents a shape such as a square shape or a cylindrical shape in a strictly geometrical sense, but also an uneven portion or a chamfer as long as the same effect can be obtained. A shape including a part and the like is also represented.
On the other hand, the expression “comprising”, “comprising”, “including”, “including”, or “having” one component is not an exclusive expression excluding the existence of another component.

  FIG. 1 is a cross-sectional view illustrating a schematic configuration of a boiler device 100 according to one embodiment.

  In one embodiment, as shown in FIG. 1, the boiler apparatus 100 includes a boiler 2 and a plurality of boiler supports 4, 6, and 8 that support the boiler 2. The boiler device 100 is configured as a self-standing boiler device that can be self-supported by the boiler supports 4, 6, and 8, and is applicable to, for example, a marine boiler device.

  The boiler 2 includes a furnace 12 provided with a main burner 10, a water drum 14, a steam drum 16, an evaporating tube group 18 connecting the water drum 14 and the steam drum 16, a front bank tube 20, a superheater 22 and a reheat furnace 26 provided with a reheat burner 24 located downstream of the group of evaporators 18 in the flow direction F1 of the combustion gas generated by combustion by the main burner 10.

  In order to arrange the reheat burner 24 so that the flame of the reheat burner 24 is less susceptible to the influence of the flow of the combustion gas from the main burner 10, the bottom 27 of the reheat furnace 26 It is formed to protrude.

  The bottom portion 27 of the reheat furnace 26 includes a bottom header 30 provided at a position lower than the water drum 14, and a plurality of bottom water cooling tubes 32 connecting the bottom header 30 and the water drum 14. The bottom header 30 extends along the axial direction of the water drum 14 (see FIG. 2). The side wall portion 34 of the reheating furnace includes a plurality of side wall water cooling tubes 35 connecting the bottom header 30 and the steam drum 16.

  The combustion gas generated by the combustion by the main burner 10 passes through the front bank tube 20, the superheater 22, and the evaporating tube group 18 in order as shown by an arrow F1, and the steam or the like flowing in the heat transfer tubes constituting these components. Heat the fluid.

  The combustion gas that has passed through the evaporating tube group 18 and the combustion gas generated by the combustion by the reheating burner 24 move up the reheating furnace 26 as shown by an arrow F2, and the reheating furnace provided on the upper part of the reheating furnace 26. After the steam flowing through the vessel 28 is heated, the steam is discharged from the reheating furnace 26.

  According to such a configuration, the steam expanded in the steam turbine (not shown) and brought into a state close to the saturation temperature can be reheated by the reheater 28, so that the reheated steam is supplied to the steam turbine of the next stage. (Expansion cycle) (reheat cycle). Thereby, the thermal efficiency of the steam turbine can be improved.

  Next, the boiler supports 4, 6, and 8 will be described with reference to FIGS. FIG. 2 is a plan view showing an example of the arrangement of the boiler supports 4, 6, 8 and the sliding direction of the boiler supports 4, 6, 8 accompanying the thermal expansion of the boiler 2. Hereinafter, for convenience, the axial direction of the water drum 14 will be referred to as the front-back direction, and the horizontal direction orthogonal to the axial direction of the water drum will be referred to as the left-right direction.

  In the illustrated exemplary form, the boiler apparatus 100 includes a plurality of boiler supports 4 (4R, 4F) configured to support the water drum 14 of the boiler 2. The boiler support 4R is arranged to support the rear part of the water drum 14, and the boiler support 4F is arranged to support the front part of the water drum. The boiler support 4R sets the water drum 14 so that even if thermal deformation (thermal elongation) occurs in the boiler 2 during operation of the boiler device 100, the water drum 14 is a fixed point where the support target is not displaced in the front-back direction, the left-right direction, and the up-down direction. Fixedly supported. The boiler support 4F allows the water drum 14 to allow thermal expansion in the front-rear direction during operation of the boiler device 100 (so that the portion supporting the water drum 14 slides forward d1 with the thermal expansion). Is configured as a slide support base that slides in the front-rear direction. Each of these boiler supports 4 (4R, 4F) supports the water drum 14 so that the position of the water drum 14 does not change in the left-right direction even if the boiler 2 undergoes thermal deformation during operation of the boiler device 100. The support point Pd (the lowest point of the water drum 14 in the illustrated embodiment) of the water drum 14 by each of the boiler support bases 4 (4R, 4F) serves as a base point for thermal expansion in the horizontal direction and the vertical direction. I have.

  Further, in the illustrated embodiment, the boiler device 100 includes a boiler support base configured to support a bottom header 36 extending along the horizontal direction from the rear portion of the water drum 14 to the right side (the furnace 12 side). 6 (6R) and a boiler support 6 (6F) configured to support a bottom header 37 extending horizontally from the front of the water drum 14 to the right (toward the furnace 12). The boiler support 6R allows the bottom header 36 to allow thermal expansion in the left-right direction during operation of the boiler apparatus 100 (so that the portion supporting the bottom header 36 slides rightward d2 with the thermal expansion). Is configured as a slide support base that slides in the left-right direction. The boiler support 6F is configured to allow the thermal expansion along the horizontal plane during the operation of the boiler apparatus 100 (the thermal expansion in the direction d3 in which the front-rear direction and the left-right direction are combined) (the bottom header 37 is attached with the thermal expansion). The portion supporting the bottom header 37 is configured as a slide support that slides along a horizontal plane so that the supporting portion slides in the combined direction d3).

  Also, in the illustrated exemplary form, boiler apparatus 100 includes a boiler support 8 (8R, 8F) configured to support bottom header 30 of reheat furnace 26. The boiler support 8R is arranged to support the rear part of the bottom header 30, and the boiler support 8F is arranged to support the front part of the bottom header 30. As will be described in detail later, the boiler support 8R is configured to allow thermal expansion in a direction d4 in which the front-rear direction, the left-right direction, and the up-down direction are combined during operation of the boiler device 100. Further, the boiler support 8F is configured to allow thermal expansion in a direction d5 in which the front-back direction, the left-right direction, and the up-down direction are combined during operation of the boiler device 100, as described later in detail.

  Here, a detailed configuration of the boiler support 8 (8R, 8F) will be described with reference to FIGS. FIG. 3 is a diagram illustrating a partial configuration of the boiler device 100 when the water drum 14 is viewed in the axial direction. FIG. 4 is a perspective view showing a partial configuration of the boiler device 100. FIG. 5 is an exploded perspective view of the boiler support 8 (8R, 8F). Since the basic configurations of the boiler support 8R and the boiler support 8F are the same, these configurations will be described below using a common drawing.

  As shown in at least one of FIGS. 3 to 5, the boiler support 8 (8R, 8F) includes a horizontal support device 38 and a horizontal support device 38 adjacent to the horizontal support device 38 vertically below the horizontal support device 38. And an inclined support device 40 configured to support the

  The horizontal support device 38 includes a first load receiving portion 42 fixed to the bottom surface 30 a of the bottom header 30 for directly supporting the bottom header 30 of the boiler 2 and receiving the load of the bottom header 30 of the boiler 2; A horizontal support portion 46 having a horizontal support surface 44 for slidably supporting the receiving portion 42 along a horizontal plane Sh (see FIG. 3) (in a direction obtained by combining the front-rear direction and the left-right direction).

  The inclined support device 40 is arranged along a second load receiving portion 48 that receives the load of the boiler 2 via the horizontal support device 38, and along the inclined surface Si (see FIG. 3) intersecting the second load receiving portion 48 with the horizontal plane Sh. An inclined support portion 52 having an inclined support surface 50 that is slidably supported (in a direction obtained by combining the front-back direction, the left-right direction, and the up-down direction).

  According to such a configuration, the first load receiving portion 42 slides along the horizontal plane Sh, so that the horizontal support device 38 controls the thermal expansion in the direction along the horizontal plane Sh (the direction obtained by combining the front-rear direction and the left-right direction). Can be tolerated.

  Further, when the second load receiving portion 48 slides along the inclined surface Si, the thermal expansion in a direction along the inclined surface Si (a direction obtained by combining the front-rear direction, the left-right direction, and the vertical direction) is performed by the inclined support device 40. Can be tolerated.

  For this reason, by the combined movement of the sliding of the first load receiving portion 42 along the horizontal plane Sh and the sliding of the second load receiving portion 48 along the inclined surface Si, the support target portion of the boiler 2 (illustrated). In the embodiment, thermal deformation near the bottom header 30) can be effectively absorbed and thermal stress can be reduced.

  Therefore, as compared with a slide support leg that slides along one surface as described in Patent Document 1, it absorbs three-dimensional thermal deformation that deviates from the one surface and reduces thermal stress. It can be reduced effectively.

  As a configuration for absorbing the three-dimensional thermal deformation as described above, as shown in FIG. 10, a spring hanger that vertically expands and contracts a horizontal support device 38 having a horizontal slide mechanism as described above. Although a configuration in which the spring structure is supported by the spring structure Cz is also conceivable, in this case, as an adverse effect of adopting the spring structure, the boiler support base tends to be large and the load resistance is likely to be reduced. Further, the structure becomes complicated, and the installation location is restricted by the specification of the spring determined according to the load condition to be supported. Adjustment and assembly work is required on site and cannot be shipped as a finished product.

  On the other hand, according to the boiler support 8 (8R, 8F), since the three-dimensional thermal deformation can be absorbed as described above without using a spring structure, the structure is simplified. The size can be reduced, and the number of parts can be reduced. Further, on-site adjustment and assembling are not required, and it is possible to obtain a finished product in a form as shipped from the factory.

  In one embodiment, as shown in FIG. 6, when viewed in the axial direction of the water drum 14, the inclined support surface 50 is formed by a support point Pd of the water drum 14 by the boiler support 4 (4R, 4F) that supports the water drum 14. A straight line Lp connecting (the lowest point of the water drum 14 in the illustrated form) and the support point Ph of the bottom header 30 by the boiler support 8 (8R, 8F) (the lowest point of the bottom header 30 in the illustrated form). It may be formed along a parallel line Lq. In this case, when viewed in the axial direction of the water drum 14, the inclined support surface 50 is formed parallel to the straight line Lp or 15 degrees or less (preferably 10 degrees or less, more preferably 5 degrees or less) with respect to the straight line Lp. May be formed. When the inclined support surface 50 is not parallel to the straight line Lp, the angle θ1 formed by the inclined support surface 50 and the vertical line Lv in the axial direction of the water drum 14 forms the straight line Lp and the vertical line Lv. The inclined support surface 50 may be formed so as to be smaller than the angle θ2.

  As described above, by forming the inclined support surface 50 along the line Lq parallel to the straight line Lp (at an angle parallel or nearly parallel to the straight line Lp), the second load receiving portion along the thermal elongation direction 48 can be slid with respect to the inclined support surface 50, and the thermal stress can be effectively reduced.

  When the inclined support surface 50 is formed so that the angle θ1 is smaller than the angle θ2, the total amount of loads applied to the horizontal support device 38 and the inclined support device 40 can be effectively reduced. This is because the sliding of the second load receiving portion 48 obliquely downward along the inclined support surface 50 is less than the sliding of the first load receiving portion 42 leftward along the horizontal support surface 44 in the thermal elongation process. Is more likely to be caused by the contribution of gravity. In the thermal elongation process, when the second load receiving portion 48 slides along the inclined support surface 50 to a position corresponding to the amount of thermal elongation in the vertical direction, the second load receiving portion 48 depends on the inclination angle of the inclined support surface 50. May move to the left more than the thermal expansion in the left-right direction. In this case, when the first load receiving portion 42 slides rightward, the first load receiving portion 42 moves to a position corresponding to the amount of thermal elongation in the left-right direction. However, the first load receiving portion 42 and the second load receiving portion 48 Since they move in opposite directions in the left-right direction, an inefficient sliding operation occurs in absorbing thermal elongation, and the total amount of load applied to the horizontal support device 38 and the inclined support device 40 increases ( The slide amount increases, and the device configuration increases in size).

  In this regard, by making the angle θ1 smaller than the angle θ2 as described above, the second load receiving portion 48 slides along the inclined support surface 50 to a position corresponding to the amount of vertical thermal expansion in the thermal expansion process. Even in this case, the phenomenon that the second load receiving portion 48 moves to the left more than the thermal expansion amount in the left-right direction is less likely to occur. Therefore, the occurrence of the phenomenon that the first load receiving portion 42 and the second load receiving portion 48 move in opposite directions in the left-right direction is suppressed, so that the thermal elongation is efficiently absorbed, and the horizontal support device 38 and the inclined support device are used. It is possible to effectively reduce the total amount of load applied to the load 40 (suppress an increase in the amount of slide and suppress an increase in the size of the device configuration).

  In one embodiment, for example, as shown in at least one of FIGS. 4 and 5, the first load receiving portion 42 includes an arc-shaped plate portion 54 having an arc-shaped cross section that directly supports the bottom header 30, and an arc-shaped plate portion 54. , An upper horizontal plate portion 58 extending along the horizontal plane Sh (see FIG. 3) and having a plurality of bolt holes 56 formed therein, a lower surface of the arc-shaped plate portion 54 and an upper horizontal plate portion 58. And a connection portion 59 for connecting to the upper surface. The bottom header 30 and the arc-shaped plate portion 54 may be joined by welding or the like so that their relative positions do not change. The horizontal support portion 46 supports the upper horizontal plate portion 58 adjacent to the lower side of the upper horizontal plate portion 58 and also has a lower horizontal plate portion 62 having a plurality of bolt holes 60 formed therein, and a lower horizontal plate portion 62. And a center plate portion 65 that supports a center portion of the lower horizontal plate portion 62 in the front-rear direction. In this case, the above-described horizontal support surface 44 is the upper surface of the lower horizontal plate portion 62. The horizontal support device 38 includes an upper horizontal plate portion 58 and a lower horizontal plate which are inserted through bolt holes 56 provided in the upper horizontal plate portion 58 and bolt holes 60 provided in the lower horizontal plate portion 62. It includes a bolt 66 for connecting the portion 62, a washer 67 in which the bolt 66 is inserted, and a nut 68 screwed to the bolt 66. As shown in FIG. 7A, the diameter D1 of the bolt hole 56 of the upper horizontal plate portion 58 is larger than the shaft diameter D2 of the bolt 60.

  According to such a configuration, as shown in FIG. 7B and FIG. 7C, the relative position of the bolt hole 56 with respect to the bolt 66 can be changed along the horizontal plane Sh (in a direction in which the front-rear direction and the left-right direction are combined). The upper horizontal plate portion 58 can be slid horizontally along the lower horizontal plate portion 62 while connecting the upper horizontal plate portion 58 and the lower horizontal plate portion 62 with the bolts 66. Therefore, the first load receiving portion 42 can be slid along the horizontal plane Sh on the horizontal supporting portion 46 while connecting the first load receiving portion 42 and the horizontal support portion 46 with a simple configuration.

  In one embodiment, for example, as shown in FIGS. 4 and 5, the second load receiving portion 48 extends along the inclined surface Si (see FIG. 3) and has an upper inclined plate portion in which a bolt hole 70 is formed. 72. The left and right ends of the upper inclined plate portion 72 are connected to the pair of side wall portions 64 described above, and the left and right central portions of the upper inclined plate portion 72 are connected to the central plate portion 65 described above. The lower horizontal plate portion 62, the side wall portion 64, the center plate portion 65, and the upper inclined plate portion 72 have an integral structure by welding or the like so that their relative positions do not change. That is, the horizontal support portion 46 and the second load receiving portion 48 have an integral structure so that the relative position between them does not change. The inclined support portion 52 supports the upper inclined plate portion 72 adjacent to the lower side of the upper inclined plate portion 72, and has a lower inclined plate portion 76 in which a bolt hole 74 is formed; a bottom plate portion 78 to be grounded; A pair of side wall portions 80 erected from the bottom plate portion 78 to support the left and right ends of the lower inclined plate portion 76, and a pair of side wall portions 80 erected from the bottom plate portion 78 to support the left and right central portion of the lower inclined plate portion 76. It has a central plate portion 81a provided, and a central plate portion 81b erected from a bottom plate portion 78 to support the central portion in the front-rear direction of the lower inclined plate portion 76. In this case, the above-described inclined support surface 50 is the upper surface of the lower inclined plate portion 76. The lower inclined plate portion 76, the bottom plate portion 78 and the side wall portion 80, the central plate portion 81a and the central plate 81b have an integral structure by welding or the like so that their relative positions do not change.

  The tilt support device 40 includes an upper tilt plate portion 72 and a lower tilt plate portion 76 that are inserted through bolt holes 70 provided in the upper tilt plate portion 72 and bolt holes 74 provided in the lower tilt plate portion 76. And a washer 83 into which the bolt 82 is inserted, and a nut 84 screwed to the bolt 82. Also, as shown in FIG. 8A, the diameter D3 of the bolt hole 70 of the upper inclined plate portion 72 is larger than the shaft diameter D4 of the bolt 82.

  According to such a configuration, as shown in FIGS. 8B and 8C, the relative position of the bolt hole 70 with respect to the bolt 82 is changed along the inclined surface Si (in a direction obtained by combining the front-back direction, the left-right direction, and the up-down direction). Therefore, the upper inclined plate portion 72 can be slid along the lower inclined plate portion 76 while connecting the upper inclined plate portion 72 and the lower inclined plate portion 76 using the bolts 82. Therefore, the second load receiving portion 48 can be slid along the inclined surface Si with respect to the inclined support portion 52 while connecting the second load receiving portion 48 and the inclined support portion 52 with a simple configuration.

  As described above, the boiler support 8 (8R, 8F) described with reference to some drawings includes the first load receiving portion 42 that receives the load of the boiler 2 and the first load receiving portion 42 along the horizontal plane Sh. And a horizontal support portion 46 having a horizontal support surface 44 for slidably supporting the horizontal support device 38. A second load receiving portion 48 for receiving the load of the boiler 2, an inclined support portion 52 having an inclined support surface 50 for slidably supporting the second load receiving portion 48 along an inclined surface Si intersecting with a horizontal plane, And an inclined support device 40 provided adjacent to the horizontal support device 38 in the vertical direction.

  Thereby, the support target portion of the boiler 2 (illustrated as an example) by the combined movement of the sliding of the first load receiving portion 42 along the horizontal plane Sh and the sliding of the second load receiving portion 48 along the inclined surface Si. In the embodiment, thermal deformation near the bottom header 30) can be effectively absorbed and thermal stress can be reduced.

  The present invention is not limited to the above-described embodiment, and includes a form in which the above-described embodiment is modified and a form in which these forms are appropriately combined.

  For example, in the above-described embodiment, the inclined support device 40 is configured to support the horizontal support device 38 adjacent to the lower side of the horizontal support device 38, but as shown in FIG. In the stand 8 (8R, 8F), the inclined support device 40 may be configured to support the inclined support device 40 adjacent to the horizontal support device 38 on the lower side.

  In this case, the inclined support device 40 includes a second load receiving portion 48 fixed to the bottom surface 30a of the bottom header 30 so as to directly support the bottom header 30 of the boiler 2 and receiving the load of the boiler 2; An inclined support portion 52 having an inclined support surface 50 for slidably supporting the portion 48 along a slope Si intersecting with the horizontal plane Sh (in a direction obtained by combining the front-rear direction, the left-right direction, and the up-down direction).

  Further, the horizontal support device 38 combines the first load receiving portion 42 that receives the load of the boiler 2 via the inclined support device 40 with the first load receiving portion 42 along the horizontal plane Sh (the front-rear direction and the left-right direction are combined). A horizontal support portion 46 having a horizontal support surface 44 for slidably supporting (in the direction).

  According to such a configuration, similarly to the above-described embodiment, the combined movement of the sliding of the first load receiving portion 42 along the horizontal surface Sh and the sliding of the second load receiving portion 48 along the inclined surface Si is achieved. In addition, it is possible to effectively absorb thermal deformation in the vicinity of the support target portion (the bottom header 30 in the illustrated example) of the boiler support 8 and reduce thermal stress.

  In the embodiment shown in FIGS. 7A to 7C, the diameter D1 of the bolt hole 56 provided in the upper horizontal plate portion 58 is made larger than the shaft diameter D2 of the bolt 66, so that the upper horizontal plate portion 58 and the lower horizontal It is configured to be relatively movable (slidable) while being connected to the plate portion 62. However, the present invention is not limited to this configuration, and if at least one of the diameter of the bolt hole 56 of the upper horizontal plate portion 58 and the diameter of the bolt hole 60 of the lower horizontal plate portion 62 is made larger than the shaft diameter of the bolt 66, it is simple. With such a configuration, the upper horizontal plate portion 58 and the lower horizontal plate portion 62 can be relatively movable while being connected to each other.

2 Boiler 4 (4R, 4F) Boiler support 6 (6R, 6F) Boiler support 8 (8R, 8F) Boiler support 10 Main burner 12 Furnace 14 Water drum 16 Steam drum 18 Evaporation tube group 20 Front bank tube 22 Overheating Unit 24 Reheat burner 26 Reheat furnace 27 Bottom 28 Reheater 30 Bottom header 30a Bottom 32 Furnace bottom water cooling tube 34 Side wall 35 Side wall water cooling tube 36 Bottom header 37 Bottom header 38 Horizontal support device 40 Incline support device 42 First load Receiving part 44 Horizontal supporting surface 46 Horizontal supporting part 48 Second load receiving part 50 Inclined supporting surface 52 Inclined supporting part 54 Arc-shaped plate part 56 Bolt hole 58 Upper horizontal plate part 59 Connection part 60 Bolt hole 62 Lower horizontal plate part 64 Side wall portion 65 Central plate portion 66 Bolt 68 Nut 70 Bolt hole 72 Upper inclined plate portion 74 Bolt hole 7 Lower inclined plate portion 78 bottom plate portion 80 side wall portion 81a center plate portion 81b center plate portion 82 bolt 84 nut 100 boiler apparatus

Claims (14)

A boiler support for supporting the boiler,
A horizontal support device including a first load receiving portion that receives the load of the boiler, and a horizontal support portion having a horizontal support surface that slidably supports the first load receiving portion along a horizontal plane;
A second load receiving portion that receives the load of the boiler; and an inclined support portion having an inclined support surface that slidably supports the second load receiving portion along an inclined surface that intersects with a horizontal plane. An inclined support device provided vertically adjacent to the device,
Equipped with a,
A boiler configured such that the first load receiving portion slides along the horizontal plane and the second load receiving portion slides along the inclined surface with thermal expansion during operation of the boiler. Support base. The inclined support device is configured to support the horizontal support device adjacent to a lower side of the horizontal support device,
The boiler support base according to claim 1, wherein the second load receiving portion is configured to receive a load of the boiler via the horizontal support device. The horizontal support device is configured to support the tilt support device adjacent to a lower side of the tilt support device,
The boiler support base according to claim 1, wherein the first load receiving portion is configured to receive a load of the boiler via the inclined support device. The boiler includes a furnace provided with a main burner, a water drum, a steam drum, a group of evaporating tubes connecting the water drum and the steam drum, and a flow direction of a combustion gas generated by combustion by the main burner. A reheat furnace provided with a reheat burner located downstream of the evaporating tube group.
2. The boiler support according to claim 1, wherein the boiler support is configured to support a bottom of the reheating furnace formed to project downward with respect to the water drum. 3. The bottom of the reheating furnace includes a bottom header provided at a position lower than the water drum,
The boiler support of claim 4, wherein the boiler support is configured to support the bottom header. The water drum of the boiler is supported by a support stand different from the boiler support stand,
The bottom header extends along an axial direction of the water drum,
When viewed in the axial direction of the water drum, the inclined support surface is parallel to a straight line connecting a support point of the water drum by the support base supporting the water drum and a support point of the bottom header by the boiler support base. The boiler support according to claim 5, wherein the boiler support is formed along a line.   When viewed in the axial direction of the water drum, the inclined support surface is formed parallel to a straight line connecting a support point of the water drum by the another support table and a support point of the bottom header by the boiler support table. Item 7. A boiler support according to item 6.   In the axial direction of the water drum, the angle formed by the inclined support surface and the vertical line is a straight line connecting the support point of the water drum by the another support and the support point of the bottom header by the boiler support. The boiler support according to claim 6, wherein the angle is smaller than an angle formed between the boiler and a vertical line.   The boiler support according to claim 2, wherein the horizontal support portion and the second load receiving portion have an integral structure in which a relative position between the two does not change.   4. The boiler support according to claim 3, wherein the inclined support portion and the first load receiving portion have an integrated structure in which a relative position between the two does not change. The first load receiving portion has an upper horizontal plate portion extending along a horizontal plane and having a bolt hole formed therein,
The horizontal support portion has a lower horizontal plate portion formed with a bolt hole while supporting the upper horizontal plate portion adjacent to a lower side of the upper horizontal plate portion,
The horizontal support surface is an upper surface of the lower horizontal plate portion,
The horizontal support device includes the upper horizontal plate portion and the lower horizontal plate portion inserted through a bolt hole provided in the upper horizontal plate portion and a bolt hole provided in the lower horizontal plate portion. Including bolts to connect,
The boiler support according to claim 1, wherein at least one of a diameter of the bolt hole of the upper horizontal plate portion and a diameter of the bolt hole of the lower horizontal plate portion is larger than a shaft diameter of the bolt. The second load receiving portion has an upper inclined plate portion extending along the inclined surface and having a bolt hole formed therein,
The inclined support portion has a lower inclined plate portion formed with a bolt hole while supporting the upper inclined plate portion adjacent to a lower side of the upper inclined plate portion,
The inclined support surface is an upper surface of the lower inclined plate portion,
The inclined support device, the upper inclined plate portion and the lower inclined plate portion inserted through a bolt hole provided in the upper inclined plate portion and a bolt hole provided in the lower inclined plate portion. Including bolts to connect,
The boiler support according to claim 1, wherein at least one of a diameter of a bolt hole of the upper inclined plate portion and a diameter of a bolt hole of the lower inclined plate portion is larger than a shaft diameter of the bolt.   A boiler device comprising a boiler and the boiler support according to any one of claims 1 to 12.   A ship comprising the boiler device according to claim 13.

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