Boiler wall

Abstract

To provide a boiler wall capable of reducing the oscillation of a header.SOLUTION: A boiler wall 100, which forms a furnace, comprises a front wall 110 extending in a vertical direction, a ceiling wall 120 extending in a front-back direction, and a connection structure 130. The front wall 110 has a front wall upper header 114 at its upper end, and the connection structure 130 connects the front wall upper header 114 to the ceiling wall 120. The connection structure 130 also has a first mounting part 150 provided on an upper part of the front wall upper header 114, a second mounting part 160 provided on an upper surface of the ceiling wall 120, and a connection member 140 extending from the front wall upper header 114 toward the ceiling wall 120. The connection member 140 is connected to the front wall upper header 114 via the first mounting part 150, and to the ceiling wall 120 via the second mounting part 160.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to boiler walls. [Background technology]

[0002] The boiler wall that forms the boiler furnace is composed of multiple walls (water-cooled walls) made up of multiple heat transfer tubes. These walls include walls that extend vertically and walls that extend horizontally. A header is attached to the upper part of the vertically extending wall (the upper end of each heat transfer tube) (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-081610 Summary of the Invention [Problem to be solved by the invention]

[0004] The header is a heavy object, and may be subject to horizontal vibration due to horizontal excitation forces caused by vibrations such as earthquake motion. When the header oscillates horizontally, the heat transfer tubes attached to the header may bend. Membrane bars and rods are placed between the heat transfer tubes, and these membrane bars and rods are welded to each heat transfer tube. If each heat transfer tube is bent, stress will be concentrated at the welded ends between the membrane bars and rods and the heat transfer tubes, potentially damaging the welds. In other words, the oscillation of the header may damage the first wall.

[0005] The present disclosure has been made in consideration of the above circumstances, and has an object to provide a boiler wall that can reduce the shaking of a header. [Means for solving the problem]

[0006] In order to solve the above problems, the boiler wall of the present disclosure employs the following measures. A boiler wall according to one embodiment of the present disclosure is a boiler wall that forms a furnace and comprises a first wall body extending vertically, a second wall body extending horizontally, and a connection structure, wherein the first wall body has a header at its upper end, and the connection structure connects the header and the second wall body. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to reduce the rocking of the header. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a boiler wall according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an enlarged side view of a portion F2 shown in FIG. [Figure 3] FIG. 2 is an enlarged plan view of a portion F2 shown in FIG. [Figure 4] FIG. 3 is an enlarged front view of a portion F4 shown in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG. [Figure 7] FIG. 3 is an enlarged side view of part F7 shown in FIG. [Figure 8] FIG. 4 is an enlarged plan view of a portion F8 shown in FIG. [Figure 9] FIG. 3 is an enlarged side view of a portion F9 shown in FIG. [Figure 10] FIG. 4 is an enlarged plan view of a portion F10 shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a boiler wall according to an embodiment of the present disclosure will be described with reference to the drawings. In the following description, the up-down direction refers to the direction from top to bottom or bottom to top, the front-to-back direction refers to the direction from front to back or back to front, and the depth direction refers to the direction from front to back or back to front. The up-down direction, the front-rear direction, and the depth direction are substantially perpendicular to one another. The up-down direction coincides with the vertical direction, and the front-rear and depth directions coincide with the horizontal direction. Furthermore, the above directions are terms defined for the sake of easy understanding of the explanation, and do not limit the actual posture of the product.

[0010] The boiler wall 100 is a wall body of a boiler that burns fuel to generate steam, and has a furnace 101 formed inside. As shown in FIGS. 1 to 3, the boiler wall 100 includes a front wall (first wall body) 110 and a ceiling wall (second wall body) 120.

[0011] The front wall 110 is a water-cooled wall extending in the vertical direction, and has a plurality of front wall heat transfer tubes 111 and a front wall upper header 114 arranged in the depth direction.

[0012] Each front wall heat transfer tube 111 is a heat transfer tube that extends in the vertical direction. Inside each front wall heat transfer tube 111, a flow path is formed through which feed water supplied from the outside flows.

[0013] A single front wall upper header 114 is attached to the upper ends of the plurality of front wall heat transfer tubes 111 . The front wall upper header 114 is a cylindrical header that extends in the depth direction. Inside the front wall upper header 114, a flow path is formed in which the feed water guided from each front wall heat transfer tube 111 is collected. The front wall upper header 114 is located above the upper surface of the ceiling wall 120 .

[0014] A hanging lug 151 is attached to the upper part of the front wall upper header 114. The front wall upper header 114 and the hanging lug 151 are attached to each other by joining using welding, for example. The hanging lug 151 is a component for hanging the front wall 110 from a steel frame (not shown). The hanging lug 151 is, for example, a plate-like component whose thickness direction coincides with the depth direction.

[0015] A hanging bolt 172 is attached to the upper part of the hanging lug 151. The hanging lug 151 and the hanging bolt 172 are attached by, for example, inserting a common pin into both members. The hanging bolt 172 connects the hanging lug 151 to a steel frame (not shown).

[0016] As shown in FIGS. 4 to 6, a plurality of rods 112 and membrane bars 113 are provided between one front wall heat transfer tube 111 and another front wall heat transfer tube 111 adjacent thereto. Each rod 112 is joined by welding to the outer circumferential surface of each front wall heat transfer tube 111. A welded end 112a (end of a welded portion) is formed at the lower end of the lower rod 112. Each rod 112 is a component for holding a heat insulating material (not shown) between the front wall heat transfer tubes 111. The membrane bar 113 is joined by welding to the outer peripheral surface of one front wall heat transfer tube 111 and the outer peripheral surface of another front wall heat transfer tube 111. A welded end 113a (end of the welded portion) is formed at the upper end of the membrane bar 113. The membrane bar 113 is a component for sealing the spaces between the front wall heat transfer tubes 111.

[0017] As shown in FIG. 2, the front wall upper header 114 on the front wall 110 is a heavy object, and may swing back and forth due to excitation forces acting in the front-to-back direction caused by vibrations such as earthquake motion. If the front wall upper header 114 swings back and forth, each front wall heat transfer tube 111 attached to the front wall upper header 114 may bend (shown by two-dot chain lines in FIG. 2). If each front wall heat transfer tube 111 is bent, stress may be concentrated on the welded end 113a or the welded end 112a, potentially damaging the welded portion.

[0018] As shown in FIGS. 1 to 3, the ceiling wall 120 is a water-cooled wall extending in the front-to-rear direction, and has a plurality of ceiling wall heat transfer tubes 121 and a ceiling wall inlet header 124 arranged in the depth direction.

[0019] Each ceiling wall heat transfer pipe 121 is a heat transfer pipe extending in the front-rear direction. Inside each ceiling wall heat transfer pipe 121, a flow path is formed through which water supplied from the outside flows.

[0020] A ceiling wall inlet header 124 is attached to the front ends of the plurality of ceiling wall heat transfer tubes 121 . The ceiling wall inlet header 124 is a cylindrical header that extends in the depth direction. Inside the ceiling wall inlet header 124, a flow path is formed in which the feed water to be guided to each ceiling wall heat transfer pipe 121 is stored.

[0021] The front wall 110 and the ceiling wall 120 are substantially perpendicular to each other at an intersection C. It should be noted that the front wall 110 and the ceiling wall 120 do not necessarily need to intersect.

[0022] As shown in FIG. 2, the boiler wall 100 further includes a casing 171 . The casing 171 is a component that covers the intersection C, a portion of the front wall 110, and a portion of the ceiling wall 120 from the outside of the furnace. Note that the "portion of the front wall 110" referred to here includes at least the front wall upper header 114 and the upper portion of the front wall heat transfer tube 111. Also, the "portion of the ceiling wall 120" referred to here includes at least the ceiling wall inlet header 124 and the front portion of the ceiling wall heat transfer tube 121. The casing 171 covers this portion, thereby having the function of sealing off the combustion gas passing through the vicinity of the intersection C from inside the furnace to outside the furnace.

[0023] As shown in Figures 2, 3, and 7 to 10, the connection structure 130 is a structure that connects the front wall upper header 114 and the ceiling wall 120, and is provided to reduce the oscillation of the front wall upper header 114. However, the casing 171 is not included in the connection structure 130 .

[0024] The connection structure 130 includes a connection member 140 , a first attachment portion 150 , and a second attachment portion 160 .

[0025] As shown in FIGS. 2 and 3, the connecting member 140 is a member that extends from the front wall upper header 114 toward the ceiling wall 120. The connecting member 140 is, for example, a bar extending linearly, and has a rectangular cross-sectional shape (a cross-sectional shape taken along a plane perpendicular to the axis). The cross-sectional shape of the connecting member 140 may be a shape other than a rectangle. The connection member 140 is made of, for example, metal. The connecting member 140 is a component that reduces the oscillation of the front wall upper header 114 by connecting the front wall upper header 114 and the ceiling wall 120, and therefore the connecting member 140 is configured with strength and rigidity that can suppress the oscillation of the front wall upper header 114.

[0026] The connecting member 140 has a first end portion located on the first mounting portion 150 side and a second end portion located on the first mounting portion 150 side. 7 and 8, a first insertion hole 141 penetrating in the depth direction is formed near a first end of the connection member 140. A first connection pin 153 of a first attachment portion 150, which will be described later, is inserted into the first insertion hole 141. 9 and 10, a second insertion hole 142 penetrating in the depth direction is formed near the second end of the connection member 140. A second connection pin 163 of the second attachment portion 160, which will be described later, is inserted into the second insertion hole 142. The second insertion hole 142 is an elongated hole that extends in the direction in which the connection member 140 extends.

[0027] As shown in Figures 7 and 8, the first mounting portion 150 is a portion provided at the upper part of the front wall upper header 114, and has a hanging lug 151, two first support members 152, a first connecting pin 153, and two first retaining rings 154. As described above, the hanging lug 151 is a plate-shaped part attached to the upper part (more specifically, the outer peripheral surface facing upward) of the front wall upper header 114. The upper part of the hanging lug 151 is located outside the casing 171. Two first support members 152 extending rearward are connected to the rear of the hanging lug 151. The hanging lug 151 and each first support member 152 are attached by, for example, welding. Each first support member 152 is a plate-shaped component whose thickness direction coincides with the depth direction. The two first support members 152 are arranged to face each other in the depth direction with the hanging lug 151 in between. The two first support members 152 are located outside the casing 171. Note that each first support member 152 may be formed integrally with the hanging lug 151 as a single component. One first connection pin 153 is inserted through the two first support members 152 in the depth direction. The first connection pin 153 is a shaft pin that extends in the depth direction. Both ends of the first connection pin 153 are pivotally supported by the first support members 152. First retaining rings 154 are attached to both ends of the first connection pin 153 to prevent the first connection pin 153 from coming off the first support members 152.

[0028] The first connection pin 153, which is pivotally supported by the two first support members 152, is inserted into the first insertion hole 141 of the connection member 140. Therefore, the connection member 140 is attached to the two first support members 152 so as to be rotatable about the first connection pin 153. This makes it possible to avoid the connection member 140 being restricted around an axis along the depth direction when thermal expansion occurs in the front wall 110 in the up-down direction, when thermal expansion occurs in the top wall 120 in the front-to-back direction, or when the connection member 140 thermally expands in the extension direction. The connecting member 140 is disposed between the two first support members 152 with a gap therebetween. This prevents the connecting member 140 from being constrained in the depth direction by the two first support members 152 when the connecting member 140 or the first support member 152 thermally expands in the depth direction.

[0029] 9 and 10, the second mounting portion 160 is a portion provided on the upper surface of the ceiling wall 120, and has an intervening member 161, two second support members 162, a second connection pin 163, two second retaining rings 164, and four hook members 165. The second mounting portion 160 is located outside the casing 171. The interposition member 161 is a plate-like component placed on the upper surface of the ceiling wall 120 (more specifically, on the outer peripheral surface of the ceiling wall heat transfer pipe 121 facing upward), and the thickness direction of the plate is aligned with the vertical direction. Two second support members 162 extending upward are attached to the upper surface of the intervening member 161. The attachment of the intervening member 161 and each second support member 162 is performed by joining using welding, for example. Each second support member 162 is a plate-shaped component whose thickness direction coincides with the depth direction. The two second support members 162 are arranged to face each other in the depth direction. Note that each second support member 162 may be formed integrally with the intervening member 161 as a single component. One second connection pin 163 is inserted through the two second support members 162 in the depth direction. The second connection pin 163 is a shaft pin that extends in the depth direction. Both ends of the second connection pin 163 are pivotally supported by the second support members 162. Second retaining rings 164 are attached to both ends of the second connection pin 163 to prevent the second connection pin 163 from coming off the second support members 162.

[0030] The second connection pin 163, which is pivotally supported by the two second support members 162, is inserted into the second insertion hole 142 of the connecting member 140. Therefore, the connecting member 140 is attached to the two second support members 162 so as to be rotatable about the second connection pin 163. This makes it possible to avoid the connecting member 140 being constrained around an axis along the depth direction when thermal expansion occurs in the front wall 110 in the up-down direction, when thermal expansion occurs in the top wall 120 in the front-to-back direction, or when the connecting member 140 thermally expands in the extension direction. Furthermore, because the second insertion hole 142 of the connecting member 140 is an elongated hole, it is possible to avoid the connecting member 140 being constrained in the extension direction by the second connection pin 163 when thermal expansion occurs in the front wall 110 in the up-down direction, when thermal expansion occurs in the top wall 120 in the front-to-back direction, or when the connecting member 140 thermally expands in the extension direction. Furthermore, since the range of movement of the second connection pin 163 in the second insertion hole 142 is sufficiently small compared to the amplitude of the forward and backward swinging of the front wall upper header 114, even if the gap is provided, the swinging of the front wall upper header 114 is sufficiently reduced. The connecting member 140 is disposed between the two second support members 162 with a gap therebetween. This makes it possible to prevent the connecting member 140 from being constrained in the depth direction by the two second support members 162 when the connecting member 140 or the second support member 162 thermally expands in the depth direction.

[0031] Four hook members 165 are attached to the upper surface of the ceiling wall 120 (more specifically, to the outer peripheral surfaces of the ceiling wall heat transfer pipes 121 facing upward). The ceiling wall heat transfer pipes 121 and the hook members 165 are attached to each other by joining using welding, for example. Each hook member 165 is a plate-like hook-shaped component whose thickness direction coincides with the depth direction. Two of the four hook members 165 are attached to one ceiling wall heat transfer tube 121, and the remaining two are attached to another ceiling wall heat transfer tube 121. The two hook members 165 attached to the same ceiling wall heat transfer tube 121 are arranged spaced apart in the front-to-rear direction. Furthermore, the two hook members 165 attached to different ceiling wall heat transfer tubes 121 (the two hook members 165 lined up in the depth direction) are arranged in approximately the same position in the front-to-rear direction. A hook portion 165a is formed on each hook member 165. The hook portion 165a is a portion that protrudes toward another hook member 165 adjacent in the front-rear direction. Between each hook member 165 adjacent in the front-rear direction, an intervening member 161 is arranged so as to fit into the gap between the lower surface of each hook portion 165a and the upper surface of the ceiling wall heat transfer tube 121. As a result, the hook portion 165a of each hook member 165 hooks onto the upper surface of the intervening member 161, and the intervening member 161 is held by each hook member 165 in the up-down direction.

[0032] As shown in FIG. 10, one hook member 165X of the four hook members 165 is joined to the intervening member 161 by welding, for example, and the remaining three hook members 165 are not joined to the intervening member 161. As a result, when the interposing member 161 thermally expands in the depth direction, the interposing member 161 is not constrained in the depth direction by the hook member 165.

[0033] As shown in FIG. 9, a small gap is provided between the intervening member 161 and the hooking member 165 in the front-rear direction. As a result, when the interposing member 161 thermally expands in the front-rear direction, the interposing member 161 is not restrained in the front-rear direction by the hook member 165. Furthermore, the range of movement of the intervening member 161 in the gap is sufficiently small compared to the amplitude of the forward and backward swinging of the front wall upper header 114, so even if the gap is provided, the swinging of the front wall upper header 114 is sufficiently reduced.

[0034] 2, the first support member 152 of the first mounting portion 150 and the second support member 162 of the second mounting portion 160 are located outside the casing 171. Therefore, the connecting member 140 is also located outside the casing 171 and does not penetrate the casing 171. This allows the connection member 140 to be provided without impairing the sealing function of the casing 171.

[0035] This embodiment provides the following advantages. The connection structure 130 connects the front wall upper header 114 and the ceiling wall 120, so that the front wall upper header 114 and the ceiling wall 120 are structurally joined together. This reduces the front-to-back rocking of the front wall upper header 114 caused by vibration. This makes it possible to suppress damage to the front wall 110 caused by the swinging of the front wall upper header 114.

[0036] The connecting member 140 is connected to the front wall upper header 114 via the first mounting portion 150 and to the ceiling wall 120 via the second mounting portion 160, so that the connecting member 140 can be indirectly connected to the front wall upper header 114 and the ceiling wall 120. This eliminates the need to match the shape of the connecting member 140 to the shape of the front wall upper header 114 or the shape of the ceiling wall 120, simplifying the shape of the connecting member 140. By simplifying the shape of the connecting member 140, it is possible to improve the versatility and ease of handling of the connecting member 140 and reduce manufacturing costs.

[0037] Since the connecting member 140 is freely rotatable around the first connecting pin 153, when thermal expansion occurs in the vertical direction in the front wall 110, when thermal expansion occurs in the front-to-back direction in the ceiling wall 120, or when the connecting member 140 thermally expands in the extension direction, it is possible to avoid the connecting member 140 being constrained around an axis along the depth direction.

[0038] The connecting member 140 is arranged between the first support members 152 with a gap between them, so that when the connecting member 140 or the first support member 152 thermally expands in the depth direction, the connecting member 140 can be prevented from being constrained in the depth direction by the two first support members 152.

[0039] Since the connecting member 140 is located outside the casing 171 , the connecting member 140 does not penetrate the casing 171 . This allows the connection member 140 to be provided without impairing the sealing function of the casing 171.

[0040] The second mounting portion 160 is placed on the upper surface of the ceiling wall 120 and has an intervening member 161 connected to the connecting member 140, and a plurality of hooking members 165 attached to the upper surface of the ceiling wall 120 and hung on the upper surface of the intervening member 161, so that the intervening member 161 can be held in the vertical direction.

[0041] Since the connecting member 140 is freely rotatable around the second connecting pin 163, when thermal expansion occurs in the vertical direction in the front wall 110, when thermal expansion occurs in the front-to-back direction in the ceiling wall 120, or when the connecting member 140 thermally expands in the extension direction, it is possible to avoid the connecting member 140 being constrained around an axis along the depth direction.

[0042] The connecting member 140 is arranged between the second support members 162 with a gap between them, so that when the connecting member 140 or the second support member 162 thermally expands in the depth direction, the connecting member 140 can be prevented from being constrained in the depth direction by the two second support members 162.

[0043] The connecting member 140 has a second insertion hole 142 through which the second connecting pin 163 is inserted, and the second insertion hole 142 is an elongated hole that runs along the extension direction of the connecting member 140. Therefore, when thermal expansion occurs in the front wall 110 in the up-down direction, when thermal expansion occurs in the top wall 120 in the front-to-back direction, or when the connecting member 140 thermally expands in the extension direction, it is possible to prevent the connecting member 140 from being restricted in its extension direction by the second connecting pin 163.

[0044] <Variation 1> The above explanation has been given using the front wall 110 and ceiling wall 120 of the boiler wall 100 as examples, but the connection structure 130 of this embodiment can be applied to any structure in which the first water-cooled wall extends vertically and has a header provided at its upper part, and the second water-cooled wall extends horizontally and has a header (the header of the first water-cooled wall) located above its upper surface. In this case, the first water-cooled wall and the second water-cooled wall do not necessarily need to intersect.

[0045] <Variation 2> As long as the connecting member 140 can be connected indirectly or directly to the front wall upper header 114, the presence or absence of the first mounting portion 150, and the shape, number, and combination of the parts that make up the first mounting portion 150 can be changed as appropriate.

[0046] <Variation 3> As long as the connecting member 140 can be connected indirectly or directly to the ceiling wall 120, the presence or absence of the second mounting portion 160, and the shape, number, and combination of the parts that make up the second mounting portion 160 can be changed as appropriate.

[0047] <Variation 4> Instead of making the second insertion hole 142 an elongated hole, the first insertion hole 141 may be made an elongated hole.

[0048] [Note] The boiler wall according to each embodiment described above can be understood, for example, as follows.

[0049] The boiler wall according to the first aspect of the present disclosure is a boiler wall (100) that forms a furnace (101), and includes a first wall body (110) extending vertically, a second wall body (120) extending horizontally, and a connection structure (130), wherein the first wall body (110) has a header (114) at its upper end, and the connection structure (130) connects the header (114) and the second wall body (120).

[0050] The system includes a first wall body (110) extending vertically, a second wall body (120) extending horizontally, and a connection structure (130). The first wall body (110) has a header (114) at its upper end. The connection structure (130) connects the header (114) and the second wall body (120), thereby structurally connecting the header (114) and the second wall body (120). This reduces horizontal shaking of the header (114) caused by vibration. This reduces damage to the first wall body (110) caused by shaking of the header (114).

[0051] In the boiler wall according to the second aspect of the present disclosure, in the first aspect, the connection structure (130) has a first mounting portion (150) provided on an upper portion of the header (114), a second mounting portion (160) provided on an upper surface of the second wall body (120), and a connecting member (140) extending from the header (114) toward the second wall body (120), and the connecting member (140) is connected to the header (114) via the first mounting portion (150) and is connected to the second wall body (120) via the second mounting portion (160).

[0052] The connecting member 140 is connected to the header 114 via the first mounting portion 150 and to the second wall 120 via the second mounting portion 160, so that the connecting member 140 can be indirectly connected to the header 114 and the second wall 120. This eliminates the need to match the shape of the connecting member 140 to the shape of the header 114 or the shape of the second wall 120, and allows for a simplification of the shape of the connecting member 140. Simplifying the shape of the connecting member 140 improves the versatility and ease of handling of the connecting member 140 and reduces manufacturing costs.

[0053] In a boiler wall according to a third aspect of the present disclosure, in the second aspect, the first mounting portion (150) has a first connection pin (153) extending horizontally, and the connection member (140) is rotatable around the first connection pin (153).

[0054] The connecting member (140) is rotatable around the first connecting pin (153), and therefore, when thermal expansion occurs in each component, the connecting member (140) can be prevented from being constrained around an axis along the horizontal direction.

[0055] In a boiler wall according to a fourth aspect of the present disclosure, in the third aspect, the first mounting portion (150) has two first support members (152) that pivotally support both ends of the first connection pin (153), and the connection member (140) is arranged between the first support members (152) with a gap between them.

[0056] The connecting member (140) is arranged between the first support members (152) with a gap between them, so that when thermal expansion occurs in each member, the connecting member (140) can be prevented from being restrained in the horizontal direction by the two first support members (152).

[0057] A boiler wall according to a fifth aspect of the present disclosure is any of the second to fourth aspects, and includes a casing (171) that includes the header (114) and covers a portion of the first wall body (110) to seal the combustion gas flowing from inside the furnace to outside the furnace, and the connecting member (140) is located outside the casing (171).

[0058] The connecting member (140) is located outside the casing (171) and therefore does not penetrate the casing (171). This allows the connecting member (140) to be provided without impairing the sealing function of the casing (171).

[0059] A boiler wall according to a sixth aspect of the present disclosure is any one of the second to fifth aspects, wherein the second mounting portion (160) is placed on an upper surface of the second wall body (120) and has an intervening member (161) connected to the connecting member (140), and a plurality of hook members (165) attached to the upper surface of the second wall body (120) and hooked onto the upper surface of the intervening member (161).

[0060] The second mounting portion (160) is placed on the upper surface of the second wall body (120) and has an intervening member (161) connected to the connecting member (140), and a plurality of hook members (165) attached to the upper surface of the second wall body (120) and hooked onto the upper surface of the intervening member (161), so that the intervening member (161) can be held in the vertical direction.

[0061] A boiler wall according to a seventh aspect of the present disclosure is the sixth aspect, wherein the second mounting portion (160) has a second connection pin (163) extending horizontally, and the connection member (140) is rotatable around the second connection pin (163).

[0062] The connecting member (140) is rotatable around the second connecting pin (163), and therefore, when thermal expansion occurs in each component, the connecting member (140) can be prevented from being constrained around an axis along the horizontal direction.

[0063] In the boiler wall according to an eighth aspect of the present disclosure, in the seventh aspect, the second mounting portion (160) has two second support members (162) attached to the upper surface of the intervening member (161) and supporting both ends of the second connection pin (163), and the connection member (140) is arranged between the second support members (162) with a gap between them.

[0064] The connecting member (140) is arranged between the second support members (162) with a gap between them, so that when thermal expansion occurs in each member, the connecting member (140) can be prevented from being restrained in the horizontal direction by the two second support members (162).

[0065] A boiler wall according to a ninth aspect of the present disclosure is the boiler wall of the seventh or eighth aspect, wherein the connecting member (140) has an insertion hole (142) through which the second connecting pin (163) is inserted, and the insertion hole (142) is an elongated hole extending in the extension direction of the connecting member (140).

[0066] The connecting member (140) has an insertion hole (142) through which the second connecting pin (163) is inserted, and the insertion hole (142) is an elongated hole aligned with the extension direction of the connecting member (140). Therefore, when thermal elongation occurs in each component, it is possible to prevent the connecting member (140) from being restricted in its extension direction by the second connecting pin (163). [Explanation of symbols]

[0067] 100 Boiler wall 101 Furnace 110 Front wall (1st wall) 111 Front wall heat transfer tube 112 Rod 112a Welded end 113 Membrane Bar 113a Welded end 114 Front wall upper header 120 Ceiling wall (second wall) 121 Ceiling wall heat exchanger tube 124 Ceiling wall inlet header 130 Connection structure 140 Connecting member 141 First insertion hole 142 Second insertion hole 150 First mounting part 151 Hanging Rug 152 first support member 153 First connecting pin 154 First retaining ring 160 Second mounting part 161 Intervening members 162 second support member 163 Second connecting pin 164 Second retaining ring 165 Hooking member 165a Hook part 165X Hook member joined with intervening member 171 Casing 172 Hanging bolt C intersection

Claims

1. A boiler wall forming a furnace, a first wall extending in a vertical direction; a second wall extending horizontally; a connection structure; Equipped with the first wall has a header at an upper end; The connection structure connects the header and the second wall. Boiler wall.

2. The connection structure includes: a first mounting portion provided on an upper portion of the header; a second mounting portion provided on an upper surface of the second wall; and a connecting member extending from the header toward the second wall and The connecting member is connected to the header via the first attachment portion, The second wall body is connected to the second mounting portion. The boiler wall according to claim 1 .

3. the first mounting portion has a first connection pin extending horizontally, The connecting member is rotatable around the first connecting pin. The boiler wall according to claim 2.

4. the first attachment portion has two first support members that pivotally support both ends of the first connection pin, The connection member is disposed between the first support members with a gap therebetween. The boiler wall according to claim 3.

5. a casing including the header and covering a portion of the first wall body to seal combustion gas flowing from inside the furnace to outside the furnace; The connecting member is located outside the casing. The boiler wall according to claim 2.

6. The second mounting portion is an interposition member placed on an upper surface of the second wall body and connected to the connection member; and a plurality of hook members attached to the upper surface of the second wall body and hooked onto the upper surface of the interposition member; have The boiler wall according to claim 2.

7. the second mounting portion has a second connection pin extending horizontally, The connecting member is rotatable about the second connecting pin. The boiler wall according to claim 6.

8. the second mounting portion includes two second support members attached to an upper surface of the interposition member and pivotally supporting both ends of the second connection pin; The connecting member is disposed between the second support members with a gap therebetween. The boiler wall according to claim 7.

9. the connection member has an insertion hole through which the second connection pin is inserted, The insertion hole is an elongated hole extending in the direction in which the connecting member extends. The boiler wall according to claim 7.

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