JP3791628B2 - Horizontal beam insertion device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a horizontal beam insertion device for temporarily installing a scaffold for maintenance in a boiler furnace.
[0002]
[Prior art]
In a large boiler for thermal power generation, it is necessary to periodically inspect the interior and remove clinker or the like adhering to the furnace wall. Therefore, conventionally, as illustrated in FIG. 5, a lower fixed scaffold 1 is provided in the vicinity of the furnace bottom, and the temporary scaffold 2 is assembled on the scaffold to perform maintenance of the furnace walls 6 a and 6 b.
[0003]
However, with such means, (1) a large boiler with a very high furnace height (for example, 40 m or more) requires a long time to build a scaffold. (2) The temperature in the furnace reaches a temperature at which workers can work in the furnace. There is a problem that it is necessary to cool the frame, and it takes a long time for this cooling. (3) Even in the case of partial repair, it is necessary to lay the scaffold to the height of the repaired part.
[0004]
Therefore, in order to increase the operating rate of the thermal power plant, it has been conventionally desired to shorten the period required for in-furnace inspection.
[0005]
[Problems to be solved by the invention]
In order to satisfy such a demand, as illustrated in FIG. 5, a beam 4 made of steel or the like is inserted horizontally from a manifold 3 provided on the furnace walls 6a and 6b, and the beam 4 is held horizontally by a wire. However, a means for pulling and inserting the beam 4 from the opposite side with a winch has been partially implemented.
[0006]
However, with such means, (1) the left and right and up and down swings of the insertion beam 4 are very large, which may damage the superheater 5 and the like in the furnace, and (2) the speed between the insertion side and the tension side. Adjustments are difficult, and (3) work adjustment between the insertion side and the winch winding side is necessary.
[0007]
The present invention has been made to solve such problems. That is, the object of the present invention is to insert a beam made of steel mold, etc., from one side of the furnace wall to the opposite side, and can be inserted horizontally with high accuracy and almost no shaking. It is an object of the present invention to provide a horizontal beam insertion device that can bridge a beam at a height in a short period of time, and does not cause damage to a superheater or the like, and can freely adjust the speed.
[0008]
[Means for Solving the Problems]
According to the present invention, in a horizontal beam insertion device that horizontally inserts a beam from one side to the opposite side through a manhole in the furnace wall, the beam is composed of beam pieces that can be connected to each other, and the beam piece includes a roller along the axial direction. A chain is attached, and the horizontal beam insertion device includes a horizontal holding device that holds the beam horizontally so as to be movable in the axial direction, and a horizontal drive device that drives the beam in the axial direction. A main roller that supports both end portions of the beam piece so as to be horizontally movable without moving up and down, a vertical roller device that sandwiches the both end portions from above and below, and a side roller device that sandwiches the both end portions from both sides with rollers. becomes, the horizontal driving unit, and a sprocket roller chain meshes of the beam pieces, Ri Do and a sprocket drive for rotationally driving the sprocket, the beam piece, horizontal flange perpendicular weather The roller chain is attached to the lower surface of the upper flange, and the main roller is inserted between the flanges of the H-shaped steel and has a diameter slightly smaller than the flange interval and has a lower surface of the upper flange. A horizontal beam insertion device is provided , wherein the sprocket is driven to rotate about a horizontal axis, and the sprocket is mounted coaxially with the main roller .
[0009]
According to the configuration of the present invention, the horizontal holding device includes the main roller that supports both end portions of the beam piece so that the beam can move horizontally without moving up and down. By supporting the both end portions without vertical movement, it can be held in a cantilevered state with high accuracy. Further, since the horizontal holding device further includes a vertical roller device and a side roller device, the vertical and horizontal shaking of the beam can be prevented by these devices.
[0010]
In addition, it is equipped with a horizontal drive device consisting of a sprocket that meshes with a roller chain attached to the beam piece and a sprocket drive device that rotationally drives the sprocket, so that it can be driven from one side of the furnace wall to the other side by rotating the sprocket. The beam can be driven in the axial direction.
Therefore, with this configuration, the beam can be bridged in a short time at the intermediate height of the furnace wall. Further, since the beam can be held horizontally with high accuracy, there is no risk of damaging the superheater or the like, and the sprocket can be driven without slipping, so that the speed can be adjusted freely.
[0012]
Further, since the main roller having a slightly smaller diameter is fitted between the flanges of the H-shaped steel , the H-shaped steel can be supported by the main roller so as to be horizontally movable without vertical movement. Further, since the sprocket and the main roller are coaxially mounted, the main roller supports the lower surface of the upper flange, and the distance between the sprocket and the roller chain can be kept constant by the main roller. It can move smoothly in the axial direction.
[0013]
The upper and lower roller device comprises an upper roller that supports the upper surface of the upper flange and a lower roller that supports the lower surface of the lower flange, and one of the upper roller and the lower roller is biased toward the other, The side roller device is preferably composed of left and right side rollers that support both surfaces of the web, one of which is biased toward the other.
[0014]
This configuration prevents the H-shaped steel from swinging up and down and from side to side, so that the shaft center can be held horizontally, and the position of the roller chain attached to the H-shaped steel is prevented from shifting, ensuring engagement with the sprocket. Can be held in.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and used for the common part in each figure.
FIG. 1 is an overall plan view of a horizontal beam insertion apparatus according to the present invention, FIG. 2 is a plan view of the main part of part A in FIG. 1, and FIG. 3 is a partially enlarged view of part B in FIG. 4 is a cross-sectional view taken along the line CC of FIG.
[0016]
As shown in FIG. 1, the horizontal beam insertion device 10 of the present invention is configured to horizontally insert a beam 7 from one side to the opposite side through manholes 3a and 3b provided in the furnace walls 6a and 6b of the boiler. . The beam 7 includes beam pieces 7a that can be connected to each other. As shown in FIG. 4, in this embodiment, the beam piece 7a is H-shaped steel composed of horizontal flanges 8a and 8b and a vertical web 8c. The H-shaped steel (beam piece 7a) is formed so as to be connectable to each other by means (for example, embedded bolts or the like) that cannot project on the outer surfaces of the flanges 8a and 8b and the web 8c. A roller chain 9 is attached to the beam piece 7a along the axial direction. That is, as shown in FIG. 4, the roller chain 9 is attached to the lower surface of the upper flange 8a of the H-shaped steel.
[0017]
2 to 4, the horizontal beam insertion device 10 of the present invention includes a horizontal holding device 12 that holds the beam 7 horizontally so as to be movable in the axial direction, and a horizontal drive device 16 that drives the beam 7 in the axial direction. I have.
[0018]
The horizontal holding device 12 includes a main roller 13 that supports both end portions of the beam piece 7a so as to be horizontally movable without moving up and down, and a vertical roller device 14 that holds the both end portions of the beam piece 7a from above and below with rollers 14a and 14b (FIG. 4). And a side roller device 15 (see FIG. 3) that sandwiches both end portions of the beam piece 7a from the left and right with rollers 15a and 15b. Further, as shown in FIG. 4, the main roller 13 has a diameter slightly smaller than the inner space between the H-shaped steel flanges 8a and 8b, and is inserted between the flanges.
[0019]
With the configuration of the present invention described above, both ends of the beam piece 7a can be supported without vertical movement by the main roller 13 inserted between the flanges of the H-shaped steel with a slight gap. It can be held with high precision and supported so as to be horizontally movable.
[0020]
As shown in FIG. 4, the upper and lower roller device 14 includes an upper roller 14a that supports the upper surface of the upper flange 8a and a lower roller 14b that supports the lower surface of the lower flange 8b. In this figure, a pair of upper rollers 14a are attached to the rocker arm 14c, and the lower roller 14b is biased upward by a spring 14d. With this configuration, it is possible to press the upper roller 14a and the lower roller 14b against the upper and lower outer surfaces of the H-shaped steel without any gap, and together with the main roller 13, the H-shaped steel can be supported so as to be horizontally movable without vertical movement. The shaft center can always be held horizontally by preventing vertical shaking.
[0021]
Furthermore, as shown in FIG. 3, the side roller device 15 includes left and right side rollers 15a and 15b that support both surfaces of the web 8c. Further, in this figure, a pair of side rollers 15a is attached to the rocker arm 15c, and the side rollers 15b are biased laterally by springs 15d. With this configuration, the side rollers 15a and 15b can be pressed without gaps on both sides of the H-shaped steel web 8c, the left and right swings of the H-shaped steel can be prevented, and the shaft center can always be held straight. The positional deviation of the roller chain 9 attached to the mold steel can be prevented, and the meshing with the sprocket 17 described later can be reliably held.
[0022]
As shown in FIGS. 2 to 4, the horizontal drive device 16 includes a sprocket 17 that meshes with the roller chain 9 of the beam piece 7 a and a sprocket drive device 18 (see FIG. 2) that rotationally drives the sprocket 17. The sprocket 17 is attached to the horizontal shaft 19 coaxially with the main roller 13. Further, the sprocket drive unit 18 includes a sprocket 18a that is rotationally driven by a motor and a speed reducer (not shown), a roller chain 18b, and a sprocket 18c that is attached to the horizontal shaft 19. The sprocket 18a and the roller chain are driven by the motor and the speed reducer. The horizontal shaft 19 is rotationally driven via 18b and the sprocket 18c.
[0023]
With this configuration, since the sprocket 17 and the main roller 13 are coaxially mounted, the main roller 13 supports the lower surface of the upper flange 8a, and the main roller 13 keeps the distance between the sprocket 17 and the roller chain 9 constant. The beam 7 can be smoothly moved in the axial direction by the rotation of the sprocket 17.
[0024]
The beam 7 to be inserted in FIG. 1 needs to be passed horizontally to the furnace wall 6b of the boiler on the opposite bank which is about 10 to 15 m away. In addition, it is necessary to suppress left / right and up / down fluctuations so as not to interfere with built-in objects (superheater etc.) in the boiler during insertion. As described above, in the horizontal beam insertion device 10 of the present invention, the upper and lower roller devices 14 and the side roller device 15 are provided to suppress left and right and up and down vibrations, and fine adjustment of left and right and up and down vibrations can be performed. It can be done. Moreover, since the sprocket drive system which rotationally drives the sprocket 17 which meshes with the roller chain 9 attached to the beam piece 7a is adopted as the horizontal drive mechanism, the horizontal insertion of the beam 7 can be performed stably and smoothly. it can.
[0025]
In addition, this invention is not limited to embodiment mentioned above, Of course, it can change variously in the range which does not deviate from the summary of this invention.
[0026]
【The invention's effect】
As described above, since the horizontal beam insertion device of the present invention allows the work to be performed while viewing the progress of the beam from the beam insertion side, the work can be performed without interfering with a built-in object (such as a superheater) in the container. (2) A constant speed can be secured, and (3) shaking can be minimized.
[0027]
Therefore, the horizontal beam insertion device of the present invention can insert a beam made of steel mold or the like from one side of the furnace wall to the opposite side, and can insert it horizontally with high accuracy and almost no shaking. There are excellent effects such as that the beam can be bridged over the intermediate height of the wall in a short time, and there is no risk of damaging the superheater or the like, and the speed can be freely adjusted.
[Brief description of the drawings]
FIG. 1 is an overall plan view of a horizontal beam insertion apparatus according to the present invention.
FIG. 2 is a plan view of the main part of FIG.
FIG. 3 is a partially enlarged view of FIG. 2;
4 is a cross-sectional view taken along the line CC in FIG. 3. FIG.
FIG. 5 is a schematic diagram showing conventional in-furnace inspection means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lower fixed scaffold 2 Temporary scaffold 3 Manifold 4 Beam 5 Superheater 6a, 6b Furnace wall 7 Beam 7a Beam piece 8a, 8b Flange 8c Web 9 Roller chain 10 Horizontal beam insertion device 12 Horizontal holding device 13 Main roller 14 Upper and lower rollers Device 15 Side roller device 16 Horizontal drive device 17 Sprocket 18 Sprocket drive device

Claims (2)

In the horizontal beam insertion device that inserts the beam horizontally from one side to the other side through the manhole on the furnace wall,
The beam is composed of beam pieces that can be connected to each other, and a roller chain is attached to the beam piece along the axial direction. The horizontal beam insertion device holds the beam horizontally so as to be movable in the axial direction. An apparatus and a horizontal driving device for driving the beam in the axial direction,
The horizontal holding device includes a main roller that supports both end portions of the beam piece so as to be horizontally movable without moving up and down, a vertical roller device that sandwiches the both end portions from above and below, and a side that sandwiches both end portions from the left and right rollers. consists of a roller device, the horizontal driving unit includes a sprocket roller chain meshes of the beam pieces, Ri Do and a sprocket drive for rotationally driving the sprocket,
The beam piece is H-shaped steel composed of a horizontal flange and a vertical web, the roller chain is attached to the lower surface of the upper flange, and the main roller is inserted between the flanges of the H-shaped steel, Has a slightly smaller diameter to support the lower surface of the upper flange, is driven to rotate about a horizontal axis, and the sprocket is mounted coaxially with the main roller,
A horizontal beam insertion device characterized by that. The upper and lower roller device includes an upper roller that supports the upper surface of the upper flange, and a lower roller that supports the lower surface of the lower flange. The upper roller is attached to a rocker arm that can swing , and the lower roller faces upward Is energized by
The side roller device includes left and right side rollers that support both sides of the web . One side roller is attached to a swingable rocker arm, and the other side roller is biased toward the one side roller. , horizontal beams insertion device according to claim 1, characterized in that.

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