CN211260755U - Furnace wall support structure and boiler provided with same - Google Patents
Furnace wall support structure and boiler provided with same Download PDFInfo
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- CN211260755U CN211260755U CN201922127933.8U CN201922127933U CN211260755U CN 211260755 U CN211260755 U CN 211260755U CN 201922127933 U CN201922127933 U CN 201922127933U CN 211260755 U CN211260755 U CN 211260755U
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- corner
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Abstract
The utility model provides an in the installation of angle connecting rod and back-up, can carry out the oven supporting construction of the location operation of angle connecting rod and possess this oven supporting construction in the short time through easy operation. The furnace wall support structure is provided with: an elongated back stay (10) extending in a predetermined direction along the outside of the furnace wall (70); a back support side bracket (20) which is a polygonal flat plate provided with a first rotating part, wherein the distances from each side to the rotating center of the first rotating part are different, and one side selected from each side is connected with an end part (12) of the back support (10) in a specified direction; a corner bracket (30) which is connected to a corner (72) of the furnace wall (70) and is provided with a second rotating part; and an angle link (40) having one end connected to the first rotating portion and the other end connected to the second rotating portion.
Description
Technical Field
The present invention relates to a furnace wall support structure and a boiler provided with the same.
Background
The furnace wall of the boiler is provided with a back support in order to suppress deformation due to heat generated by combustion gas flowing in the furnace and furnace pressure during operation of the boiler.
The back-brace is configured to surround an outer periphery of the furnace wall. The corner of the furnace wall is configured as follows: a link mechanism is used to connect a corner of the furnace wall and the back stay via the link mechanism, thereby absorbing a thermal elongation difference between the furnace wall and the back stay (for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese examined patent publication No. 60-5842
SUMMERY OF THE UTILITY MODEL
Problem to be solved by utility model
In the mounting of the back stay connected to the furnace wall via the link mechanism, an error may occur in which the connection position between the link mechanism and the back stay is deviated from the planned design position due to a dimensional error at the time of manufacturing, an assembly error in field construction, or the like. However, in order to appropriately absorb the thermal elongation difference by the link mechanism, the connection position between the link mechanism and the back support needs to be controlled to a position within a predetermined size based on a design plan. In other words, at the time of mounting of the back stay, positioning of the link mechanism connected to the back stay is required.
Examples of the positioning method include the following methods: the plate provided with the rotation point of the connecting link mechanism is fixed to the back stay by welding, and the rotation point of the connecting link mechanism of the back stay is positioned by appropriately adjusting and changing the welding position. Specifically, as shown in fig. 8, the back stay 110 is formed with a through hole 122 having a diameter larger than that of a pin 134 forming a rotation point of the link 130. The shim plate 150 is formed with a pin hole 152 having a diameter substantially equal to the diameter of the pin 134 and through which the pin 134 passes, and the position of the shim plate 150 is fixed by welding the shim plate 150 to the back stay 110 at an appropriate position. At this time, the position of the pin hole 152 can be optimized by adjusting the position of the pad 150 within a range in which the pin 134 inserted into the pad 150 is movable in the through hole 122, and the rotation point of the link mechanism can be positioned.
However, this positioning work is troublesome, and since a plurality of back supports are provided for the furnace wall, it may take a long time to perform the positioning work.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a furnace wall support structure capable of performing positioning work of a corner link in a short time by easy work in attaching the corner link and a backstay, and a boiler including the furnace wall support structure.
Means for solving the problems
In order to solve the above problem, the furnace wall support structure of the present invention adopts the following configuration.
That is, an aspect of the present invention provides an oven wall support structure including: an elongated back stay extending in a predetermined direction along an outer side of the furnace wall; a back support side bracket which is a polygonal flat plate provided with a first rotating portion, and in which distances from each side to a rotation center of the first rotating portion are different, and one side selected from the sides is connected to an end portion of the back support in the predetermined direction; a corner bracket connected to a corner of the furnace wall and provided with a second rotating part; and an angle link having one end connected to the first rotating portion and the other end connected to the second rotating portion.
According to the furnace wall support structure of the present invention, since the distances of the first turning portion of the back-support-side bracket provided on the flat plate having a polygonal shape are different from each of the sides, the distance from the end of the back-support to the first turning portion of the connecting angle link can be selected by selecting the side to be connected to the back-support from each of the sides of the polygonal shape, and the back-support-side bracket can be connected to the back-support. Here, the rotation center of the first rotating portion is the rotation center of the angle link. In other words, respective distances from the rotational center of the first rotating portion to the respective sides are equal to respective distances from the rotational center of the corner link to the respective sides. Thus, the connection position of the corner link to the end portion of the back stay (i.e., the rotation center of the first rotating portion) can be easily changed by selecting the side of the back stay-side bracket connected to the back stay.
For example, in the mounting of a back stay connected to a furnace wall via a corner bracket and a corner link, an error may occur in the connection position between the corner link and the back stay, which is deviated from the design planned position due to a dimension error, an assembly error, or the like. In order to control the error to a position within a predetermined size based on a design plan, for example, a method of appropriately changing a welding position of a plate provided with a first rotating portion provided on a back support with respect to the positioning of the link mechanism may be considered. However, this positioning work is complicated, and since a plurality of back supports are provided for the furnace wall, it takes a long time to perform the positioning work. However, as described above, the connection position between the corner link and the back stay is easily changed, and the connection position of the corner link controlled to a position within a predetermined size based on the design plan can be easily changed only by selecting the side of the back-stay-side bracket connected to the back stay, so that the positioning work can be performed in a short time.
In addition, the furnace wall support structure according to an aspect of the present invention includes a reinforcing member connected to the back-up side bracket and the back-up.
According to the furnace wall support structure of the present aspect, the reinforcing member is connected to both the back-support-side bracket and the back support, and therefore, the connection between the back support-side bracket and the back support can be made stronger. Here, the back-support-side bracket and the back support, the back-support-side bracket and the reinforcing member, and the back support and the reinforcing member are connected by, for example, welding.
In the furnace wall support structure according to the present invention, the first rotation portion is a pin that penetrates through a through hole formed in the back-support-side bracket, and the second rotation portion is a pin that penetrates through a through hole formed in the corner bracket.
According to the furnace wall support structure of this aspect, the first rotation portion and the second rotation portion can be configured by a simple and convenient structure in which the pin is inserted through the through hole formed in each of the back-support-side bracket and the corner bracket.
Further, a boiler according to an aspect of the present invention includes the furnace wall support structure.
Effect of the utility model
According to the furnace wall support structure and the boiler provided with the same of the present invention, the positioning operation of the angle link can be performed in a short time by easy operation in the installation of the angle link and the back stay.
Drawings
FIG. 1 is a perspective view showing a furnace wall of a boiler to which a furnace wall support structure according to an embodiment of the present invention is applied.
Fig. 2 is a partially enlarged view of a portion a of fig. 1.
Fig. 3 is a top view of the back support side bracket.
FIG. 4 is a top view of a corner bracket attached to a corner of a furnace wall.
FIG. 5 is a plan view of the furnace wall support structure shown in FIG. 1.
FIG. 6 is a perspective view of the furnace wall support structure with the reinforcement members attached.
FIG. 7 is a plan view of the furnace wall support structure shown in FIG. 6.
Fig. 8 is a perspective view showing a conventional example of the furnace wall support structure.
Description of reference numerals:
1 furnace wall supporting structure
10 back support
12 end part
12A end face
20 back support side support
22 through hole
30-degree bracket
32 through hole
24a first side
24b second side
24c third side
24d fourth side
40-angle connecting rod
42 through hole
44. 46 pin
60 reinforcing member
70 furnace wall
72 corner
110 back support
122 through hole
130 connecting rod
134 pin
150 backing plate
152 pin hole
d1 first distance
d2 second distance
d3 third distance
d4 fourth distance
Detailed Description
The furnace wall supporting structure 1 according to an embodiment of the present invention will be described below with reference to the drawings.
The furnace wall support structure 1 is supported by the backstays 10 in order to suppress deformation of the furnace wall 70, which occurs due to, for example, heat generated by combustion gas flowing in the furnace during operation of the boiler and furnace internal pressure.
As shown in fig. 1 and 2, the furnace wall support structure 1 includes: a back support 10, a back support side bracket 20, a corner bracket 30, and a corner link 40.
The back support 10 is an elongated plate member extending in a predetermined direction. The backstays 10 are provided in a plurality of stages in the vertical direction along the outer surface of the furnace wall 70 of the boiler.
In the back stay 10, a plane (hereinafter, referred to as an "end face 12A") orthogonal to the longitudinal direction is formed at an end portion 12 in the longitudinal direction (the direction in which the back stay 10 extends). The back support bracket 20 is connected to the end surface 12A by welding or the like, for example. The end face 12A may be provided by connecting a plate member formed with the end face 12A to the end portion 12 of the back frame 10 by welding or the like, or may be provided integrally with the back frame 10.
The back-support-side bracket 20 is a flat plate having a polygonal shape in a plan view, and has a quadrangular shape in fig. 3 as an example.
One side (described in detail later) selected from four sides of the quadrangular shape of the back support side bracket 20 is connected to an end surface 12A formed at the end portion 12 of the back support 10. The connection of the back support 10 to the back support side bracket 20 is performed by welding, for example.
As shown in fig. 3, the back-support-side bracket 20 is provided with one through-hole 22. As shown in fig. 2 and 3, the pin 44 is inserted through the through hole 22. At this time, both ends of the pin 44 in the longitudinal direction protrude from both surfaces of the back-support-side bracket 20, and the center axis of the pin 44 forms a rotation fulcrum (a rotation center of the first rotating portion) of the angle link 40 described later. The outer diameter of the pin 44 varies depending on the load to be supported, and is, for example, about 30mm to 150 mm. The pin 44 is rotatable around the central axis with respect to the through hole 22, and the inner diameter of the through hole 22 is a diameter having a clearance (for example, a clearance of about 0.5mm to 1 mm) with respect to the outer diameter of the pin 44, through which the pin 44 is rotatable.
As shown in fig. 2, the corner bracket 30 is a plate member that is connected to a corner portion 72 on the outer side of the furnace wall 70 and extends outward of a plane (horizontal plane) orthogonal to the furnace wall 70. As shown in fig. 4, the corner bracket 30 is provided with two through holes 32.
As shown in fig. 2 and 4, the pin 46 is inserted through the through hole 32. At this time, both ends of the pin 46 protrude from both surfaces of the angle bracket 30, and a central axis of the pin 46 forms a rotation fulcrum (a rotation center of the second rotation portion) of the angle link 40 described later.
The outer diameter of the pin 46 varies depending on the load to be supported, and is, for example, about 30mm to 150 mm. The pin 46 is rotatable around the central axis with respect to the through hole 32, and the inner diameter of the through hole 32 is a diameter having a clearance (for example, a clearance of about 0.5mm to 1 mm) with respect to the outer diameter of the pin 46, through which the pin 46 is rotatable.
As shown in fig. 2, the corner link 40 is an elongated plate member, and through holes 42 are formed at both end portions. One through hole 42 of the two through holes 42 is fitted into and fixed to an end portion of a pin 44, and the pin 44 is inserted through the through hole 22 of the back-support-side bracket 20 and protrudes from the back-support-side bracket 20. The other through hole 42 is fitted into and fixed to an end of a pin 46, and the pin 46 is inserted through the through hole 32 of the angle bracket 30 and protrudes from the angle bracket 30.
Since the pins 44 protrude from both surfaces of the back-support-side bracket 20 and the pins 46 protrude from both surfaces of the corner bracket 30, two corner links 40 are used in cooperation therewith. In other words, the corner links 40 are paired with the back-support bracket 20 and the corner bracket 30 therebetween. In the case of fig. 2, the pair of angle links 40 is 2 angle links 40 arranged in the vertical up-down direction.
As shown in FIG. 2, a corner bracket 30 is connected to a corner 72 of the furnace wall 70. The back-support-side bracket 20 connected to the two back supports 10 extending substantially perpendicularly to each other is connected to the corner bracket 30 via two diagonal links 40.
Since the pin 44 is rotatable around the axis with respect to the through hole 22 and the pin 44 is fixed to the angle link 40, the central axis of the pin 44 forms a rotation fulcrum (rotation center of the first rotating portion) of the angle link 40 with respect to the back-support-side bracket 20. Further, since the pin 46 is rotatable around the axis with respect to the through hole 32 and the pin 46 is fixed to the angle link 40, the central axis of the pin 46 forms a rotation fulcrum (a rotation center of the second rotating portion) of the angle link 40 with respect to the angle bracket 30. Thus, even if a thermal elongation difference in a predetermined direction occurs between the back stay 10 and the furnace wall 70, the angle link 40, the first rotation part, and the second rotation part can function as a link mechanism, and can absorb the thermal elongation difference.
In order to appropriately absorb the thermal elongation difference generated between the furnace wall 70 and the back stay 10, the positions of the first and second rotating parts (i.e., the positions of the pins 44 and 46) connected by the angle link 40 need to be set within an appropriate position range at the time of assembly of the back stay 10.
Specifically, as shown in fig. 5, when viewed from above, the pins 44 and 46 are preferably arranged such that: such that the straight lines joining the pins 44 and 46 are substantially parallel with respect to the furnace wall 70. However, the straight lines connecting the pins 44 and 46 need not be exactly parallel, and may be inclined with respect to the furnace wall 70 within a design allowable range. The "design allowable range" referred to herein is a range in which the thermal elongation difference between the back brace 10 and the furnace wall 70 can be appropriately absorbed, and varies depending on the boiler specification. The inclination of the straight line connecting the pin 44 and the pin 46 can be adjusted by changing the position of the pin 44 relative to the position of the pin 46, for example.
The details of the back-support-side bracket 20 will be described next.
As shown in fig. 3, a through hole 22 having a center C is formed in the back-support-side bracket 20.
The back support side bracket 20 has a polygonal shape, for example, a quadrangular shape as shown in fig. 3, and for example, the upper side of the figure is defined as a first side 24a, and the other sides of the figure are defined as a second side 24b, a third side 24c, and a fourth side 24d in the clockwise direction. At this time, the distance from the first side 24a to the center C is defined as a first distance d1, and similarly, the distances from the other sides of the figure to the center C are defined as a second distance d2, a third distance d3, and a fourth distance d4 in the clockwise direction.
At this time, the center C of the through hole 22 and the shape of the back-supporting bracket 20 are set so that the first distance d1 to the fourth distance d4 are all different. For example, d1 to d4 are set so that the distances sequentially increase by 5mm, as in d 2-d 1+5mm, d 3-d 2+5mm, and d 4-d 3+5 mm. Thus, the operator can select the distance from the end surface 12A to the center C (i.e., the rotation center of the first rotating portion) by selecting the side of the back-support-side bracket 20 connected to the end surface 12A. In other words, when the position of the pivot point of the corner link 40 with respect to the end surface 12A is selected, the side of the back-support-side bracket 20 connected to the end surface 12A is selected and fixed, whereby the center C of the through-hole 22 can be set within an appropriate position range.
The present embodiment provides the following effects.
By selecting the side of the back-support-side bracket 20 connected to the back support 10 (formed on the end surface 12A of the back support 10), the pivot point of the angle link 40 with respect to the end surface 12A of the back support 10 (i.e., the pivot center of the first pivot portion) can be easily changed. Therefore, the positioning operation can be easily performed only by selecting the side of the back-support-side bracket 20 connected to the end surface 12A and performing the connection and fixation with respect to the connection position (position of the pivot point) of the corner link 40 controlled to the position within the predetermined range allowed by the design plan, and therefore the positioning operation can be performed in a short time.
Further, the center axes of the pins 44 and 46 can be configured as the rotation center of the first rotation portion and the rotation center of the second rotation portion by a simple and convenient structure in which the pins 44 and 46 are inserted into the through holes 22 and 32 formed in the back-support-side bracket 20 and the corner bracket 30, respectively.
As shown in fig. 6 and 7, a plate-shaped reinforcing member 60 connected to the end surface 12A of the back support 10 and the back support-side bracket 20 may be provided. In this case, the connection between the back-support-side bracket 20 and the back support 10 can be further secured. Here, the back-support-side bracket 20 and the reinforcing member 60, and the end surface 12A of the back support 10 and the reinforcing member 60 are fixed by, for example, welding.
Claims (4)
1. A furnace wall support structure comprising:
an elongated back stay extending in a predetermined direction along an outer side of the furnace wall;
a back support side bracket which is a polygonal flat plate provided with a first rotating portion, and in which distances from each side to a rotation center of the first rotating portion are different, and one side selected from the sides is connected to an end portion of the back support in the predetermined direction;
a corner bracket connected to a corner of the furnace wall and provided with a second rotating part; and
an angle link having one end connected to the first rotating portion and the other end connected to the second rotating portion.
2. The furnace wall support structure according to claim 1,
the furnace wall support structure includes a reinforcing member connected to the back-support-side bracket and the back support.
3. The furnace wall support structure according to claim 1 or 2,
the first rotating part is a pin inserted into a through hole formed in the back-supporting bracket,
the second rotating portion is a pin inserted through a through hole formed in the corner bracket.
4. A boiler is characterized in that the boiler is provided with a boiler body,
the boiler is provided with the furnace wall support structure according to any one of claims 1 to 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018004795U JP3220242U (en) | 2018-12-10 | 2018-12-10 | Furnace wall support structure and boiler equipped with the same |
| JP2018-004795 | 2018-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211260755U true CN211260755U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922127933.8U Active CN211260755U (en) | 2018-12-10 | 2019-12-02 | Furnace wall support structure and boiler provided with same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3220242U (en) |
| CN (1) | CN211260755U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113551218A (en) * | 2021-08-10 | 2021-10-26 | 西安热工研究院有限公司 | Adjustable rigid beam corner connecting device for boiler water wall |
-
2018
- 2018-12-10 JP JP2018004795U patent/JP3220242U/en active Active
-
2019
- 2019-12-02 CN CN201922127933.8U patent/CN211260755U/en active Active
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| Publication number | Publication date |
|---|---|
| JP3220242U (en) | 2019-02-21 |
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Address after: Kanagawa Prefecture, Japan Patentee after: Mitsubishi Power Co., Ltd Address before: Kanagawa Prefecture, Japan Patentee before: MITSUBISHI HITACHI POWER SYSTEMS, Ltd. |