KR20170108292A

KR20170108292A - Horizontal type foothold for boiler main tube of thermal power plants

Info

Publication number: KR20170108292A
Application number: KR1020160031961A
Authority: KR
Inventors: 이정석; 정병용; 박민철; 우종선; 김희영
Original assignee: 한국남동발전 주식회사; (주) 세일시스
Priority date: 2016-03-17
Filing date: 2016-03-17
Publication date: 2017-09-27

Abstract

The present invention relates to a horizontal footrest for a boiler tube structure of a thermal power plant, which comprises a first support bar; Second support bars movably positioned between the first support bars; A right inner fixed unit connecting and fixing one ends of the first support bars; A right outer fixing unit which is located outside the right inner fixing unit and connects and fixes one ends of the second supporting bars; A left outer fixing unit connecting and fixing the other ends of the first supporting bars; A left inner fixed unit positioned inside the left outer fixed unit and connecting and fixing the other ends of the second supporting bars; First connection members coupled to the first support bar to be positioned on the left outer fixed unit side and having an opening groove at an end thereof; A first engaging member provided on the first linking member to adjust a width of the opening groove of the first linking member; Second connection members coupled to the second support bar to be positioned on the right outer fixed unit side and having an opening groove at an end thereof; And a second engaging member provided on the second linking member to adjust a width of the opening groove of the second linking member. According to the present invention, the length of the boiler tube structure can be variously adjusted, so that it is possible to install the boiler tube structure at various tube intervals, and the structure strength is high.

Description

{HORIZONTAL TYPE FOOTHOLD FOR BOILER MAIN TUBE OF THERMAL POWER PLANTS}

The present invention relates to a horizontal footrest for a boiler tube structure of a thermal power plant.

Thermal power generation includes a coal-fired power generation system that uses coal as a heat source and a combined-cycle power generation system that uses natural gas (LNG) as a heat source. The coal-fired power generation system generates energy by burning boiler water by boiling coal, burning the steam by rotating the turbine with the steam, and then generating electricity from the generator connected to the turbine. The combined cycle power generation system is a high-temperature combustion gas produced by burning natural gas. The gas turbine is directly turned to produce electricity. At this time, the high-temperature exhaust gas is sent to the boiler to generate water vapor. Turns it back into electricity.

1 schematically shows a boiler of a thermal power generation system.

As shown in FIG. 1, the boiler of the thermal power generation system is composed of a lower portion A to which a heat source is supplied and an upper portion B which heats water to heat the steam by a heat source supplied from the lower portion A , A lower portion (A) is a combustion chamber that receives fuel and air to generate heat by burning fuel, and the upper portion (B) includes a boiler tube structure through which a fluid flows.

Water supplied from the outside flows into the inside of the boiler tube structure 10 and water flowing through the boiler tube structure 10 undergoes a state change to steam of high temperature and high pressure by the heat supplied from the heat source of the lower portion A Is supplied to the steam turbine (20). Steam supplied to the steam turbine 20 is generated by rotating the turbine of the steam turbine 20.

In this thermal power generation system, heat exchange with water is performed in the boiler tube structure 10 by the convection heat conduction by the high-temperature combustion gas in the upper portion B of the boiler, but the combustion gas contains a large amount of the ash component Intensive sintering of the boiler tube structure 10 occurs while the boiler tube structure 10 contacts the combustion gas. In case of long-term use, parts of the boiler tube structure (10) are damaged and other parts are damaged, so the parts must be replaced . Therefore, the boiler tube structure 10 and the like should be regularly inspected.

In order to inspect or repair the boiler tube structure, a scaffold structure is installed, or horizontal scaffolds are installed on the boiler tube structure, and the operator moves or repairs the boiler tube structure through the scaffold or horizontal scaffolds.

(Hereinafter referred to as "prior art 1" hereinafter), which is provided on a top surface of a support frame and has hooks on both sides of the support frame, Safety footrests are disclosed. However, in the prior art 1, since the length between the hooks can not be adjusted, it is only possible to extend between the two spaced pipes.

Korean Patent Laid-Open Publication No. 2013-0134613 (published on Dec. 10, 2013) (hereinafter referred to as Prior Art 2) discloses a structure in which a base frame is provided with a fixed base plate and a movable base plate There is disclosed a scaffolding footrest assembly for sliding a footrest to a fixed footrest and superimposing the footrests or adjusting a distance by unfolding the footrest. However, in the prior art 2, since the length of the safety footrest can be adjusted only when the movable footrest is overlapped with the fixed footrest and when the movable footrest is arranged side by side with the fixed footrest, it is difficult to install the safety footrest at other distances have.

It is an object of the present invention to provide a horizontal footrest for a boiler tube structure of a thermal power plant having a large structural strength as well as being able to be installed at various tube intervals of the boiler tube structure by varying the length.

Another object of the present invention is to provide a horizontal footrest for a thermal power plant boiler tube structure that is easy to install.

In order to accomplish the object of the present invention, there are provided first support bars arranged in a line at intervals from each other; Second support bars movably positioned between the first support bars; A right inner fixed unit connecting and fixing one ends of the first support bars; A right outer fixing unit which is located outside the right inner fixing unit and connects and fixes one ends of the second supporting bars; A left outer fixing unit connecting and fixing the other ends of the first supporting bars; A left inner fixed unit positioned inside the left outer fixed unit and connecting and fixing the other ends of the second supporting bars; First connection members coupled to the first support bar to be positioned on the left outer fixed unit side and having an opening groove at an end thereof; A first engaging member provided on the first linking member to adjust a width of the opening groove of the first linking member; Second connection members coupled to the second support bar to be positioned on the right outer fixed unit side and having an opening groove at an end thereof; And a second latching member provided on the second linking member and adjusting a width of the opening groove of the second linking member.

The first and second support bars may have a rectangular cross-sectional shape or a square shape with an open bottom.

The right inner fixing unit includes an upper connecting plate connecting upper end portions of the first supporting bars, a lower connecting plate connecting lower end portions of the first supporting bars, and a lower connecting plate connecting the upper supporting bars, And a fastening unit for fastening to the plate.

The right outer side fixing unit includes an upper connection plate for connecting upper end portions of the second support bars, a lower connection plate for connecting lower end portions of the second support bars, And a fastening unit for fastening to the plate.

The left outer fixation unit includes an upper connection plate connecting upper end portions of the first support bars, a lower connection plate connecting lower end portions of the first support bars, And a fastening unit for fastening to the plate.

The left inner fixation unit includes an upper connection plate connecting upper end portions of the second support bars, a lower connection plate connecting lower end portions of the second support bars, and upper and lower connection plates connecting the upper and lower connection bars, And a fastening unit for fastening to the plate.

It is preferable that the first connecting member and the second connecting member are two each and the opening grooves of the first and second connecting members are respectively opened in the horizontal direction.

The first and second latching members may include a body plate portion formed in an arc shape and having a uniform thickness, and a first arcuate through-hole formed at one end of the body plate portion in an arc- .

The present invention is characterized in that the first support bars are arranged at intervals and the second support bars are arranged between the first support bars such that the first support bars are alternated with the first support bars to push the first support bars and the second support bars, Because the spacing of the two connecting members is varied, it can be adjusted to match the spacing of the tubes of the boiler tube structure.

In addition, since the first support bars and the second support bars are alternately positioned and the distance between the first and second support bars is adjusted according to the degree of overlapping of the first support bars and the second support bars, The first supporting bars and the second supporting bars support the operator even when the distance between the two connecting members is narrow or wide, so that the operator can safely move.

Further, since the opening grooves provided respectively in the first and second connecting members are horizontally opened, the operation of mounting the two tubes of the boiler tube structure is easy, and the first and second connecting members Since the first and second latching members are provided, the first and second connecting members are not easily detached from the tube while being mounted on the two tubes of the boiler tube structure, thereby preventing a safety accident.

1 is a front view schematically showing a boiler of a thermal power generation system,
2 is a perspective view showing an embodiment of a horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention,
3 is a plan view showing an embodiment of a horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention,
4 is a front view showing an embodiment of a horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention,
FIG. 5 is a plan view showing a state where the first and second support bars constituting the embodiment of the horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention are spaced apart,
6 and 7 are plan views respectively showing an operating state of an embodiment of a horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention will be described with reference to the accompanying drawings.

2 is a perspective view showing an embodiment of a horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention. 3 is a plan view showing an embodiment of a horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention. 4 is a front view showing an embodiment of a horizontal footrest for a boiler tube structure of a thermal power plant according to the present invention.

2, 3 and 4, an embodiment of a horizontal footrest for a thermal power plant boiler tube structure according to the present invention includes first support bars 100, second support bars 200, The left inner fixing unit 600, the first coupling members 700, the first coupling members 710, the second coupling member 700, the right outer fixed unit 400, the left outer fixed unit 500, the left inner fixed unit 600, (800), and a second latching member (810).

The first support bars 100 are arranged in a line spaced apart from each other. The first support bars 100 are arranged on the same plane in the horizontal direction, and the first support bars 100 are preferably formed in the same shape and size. It is preferable that the first support bar 100 has a rectangular cross section whose lower side is opened. In another embodiment of the first support bar 100, the first support bar 100 may be a square tube, wherein the cross section of the square tube is square.

The second support bars 200 are movably positioned between the first support bars 100, respectively. The second support bars 200 are arranged on the same plane in the horizontal direction, and the second support bars 200 are formed in the same shape and size. The second support bar 200 is preferably formed in the same shape and size as the first support bar 100. It is preferable that the upper surfaces of the second support bars 200 and the upper surfaces of the first support bars 100 are located on the same plane.

3, the right end surfaces of the second support bars 200 are located on the same line, and the right end surfaces of the first support bars 100 are also located on the same line, The end surfaces of the second support bars 200 are located inside the right end surfaces of the second support bars 200 and the right end surfaces of the second support bars 200 are located outside the right end surfaces of the first support bars 100. [ As a result, the left end surfaces of the second support bars 200 are located inside the left end surfaces of the first support bars 100, and the left end surfaces of the first support bars 100 are positioned on the second support bar 200 ) Of the left side surfaces of the left and right sides.

The right inner fixing unit 300 connects and fixes one ends (i.e., right ends) of the first supporting bars 100. The right inner fixed unit 300 includes an upper connection plate 310 connecting the upper end portions of the first support bars 100 and a lower connection plate 310 connecting the lower end portions of the first support bars 100. [ And a fastening unit 330 for fastening the first supporting bars 100 to the upper and lower connecting plates 310 and 320, respectively. The upper and lower connection plates 310 and 320 are preferably formed to have uniform thicknesses, widths, and lengths, respectively. The upper and lower connecting plates 310 and 320 are positioned vertically with respect to the first supporting bars 100 and the first supporting bars 100 and the second supporting bars 100 are positioned between the first supporting bars 100, The second support bars 200 are also covered. One end of the upper and lower connection plates 310 and 320 may be supported to support the side surface of the second support bar 200 positioned at one end of the first and second support bars 100 and 200 Do. The fastening unit 330 includes bolts passing through the first supporting bars 100 and the upper and lower connecting plates 310 and 320 and a nut fastened to the bolts, .

The right outer fixed unit 400 is located outside the right inner fixed unit 300 and connects and fixes one ends of the second support bars 200, i.e., right ends thereof. The right outer fixed unit 400 includes an upper connection plate 410 connecting the upper end portions of the second support bars 200 and a lower connection plate 410 connecting the lower end portions of the second support bars 200. [ And a fastening unit 430 for fastening the second support bars 200 to the upper and lower connection plates 410 and 420, respectively. The upper and lower connecting plates 410 and 420 are preferably formed to have uniform thicknesses, widths, and lengths, respectively. The upper and lower connection plates 410 and 420 are positioned perpendicular to the second support bars 200 to cover the second support bars 200. And a side plate 440 connecting the upper and lower connection plates 410 and 420 to cover the right end surfaces of the second support bars 200. The fastening unit 440 includes bolts passing through the second support bars 200 and the upper and lower connecting plates 410 and 420 and a nut fastened to the bolts, .

The left outer fixing unit 500 connects and fixes the other ends of the first supporting bars 100, i.e., the left ends thereof. The left outer fixing unit 500 includes an upper connecting plate 510 connecting the upper end portions of the first supporting bars 100 and a lower connecting plate 510 connecting the lower end portions of the first supporting bars 100. [ And a fastening unit 530 for fastening the first supporting bars 100 to the upper and lower connecting plates 510 and 520, respectively. The upper and lower connecting plates 510 and 520 are preferably formed to have uniform thicknesses, widths, and lengths, respectively. The upper and lower connecting plates 510 and 520 are vertically disposed on the first supporting bars 100 to cover the first supporting bars 100, respectively. It is preferable that a side plate 540 connecting the upper and lower connecting plates 510 and 520 to cover the left end surfaces of the first supporting bars 100 is further provided. The fastening unit 530 includes bolts passing through the first supporting bars 100 and the upper and lower connecting plates 510 and 520 and a nut fastened to the bolts, .

The left inner fixing unit 600 is located inside the left outer fixing unit 500 and connects and fixes the other ends of the second supporting bars 200, i.e., left ends thereof. The left inner fixing unit 600 includes an upper connecting plate 610 connecting the upper end portions of the second supporting bars 200 and a lower connecting plate 610 connecting the lower ends of the second supporting bars 200. [ And a fastening unit 630 for fastening the second support bars 200 to the upper and lower connection plates 610 and 620, respectively. The upper and lower connecting plates 610 and 620 are preferably formed to have a uniform thickness, width, and length, respectively. The upper and lower connecting plates 610 and 620 are positioned vertically to the first supporting bars 100 and at this time not only the second supporting bars 200 but also the second supporting bars 200 And also covers the first supporting bars 100 which are made of the same material. One end of the upper and lower connection plates 610 and 620 preferably supports the side surface of the first support bar 100 located at one end of the first and second support bars 100 and 200 Do. As an example of the fastening unit 630, the fastening unit 630 includes bolts passing through the second support bars 200 and the upper and lower connecting plates 610 and 620, respectively, and a nut .

The left end portions of the first support bars 100 are connected and fixed by the left outer fixation unit 500 and the right end portions of the first support bars 100 are connected and fixed by the right inner fixation unit 300, Since the left ends of the bars 200 are connected and fixed by the left inner fixed unit 600 and the right ends of the second support bars 200 are fixed by the right outer fixed unit 400, When the left outer fixed unit 500 is pulled to the left and the right outer fixed unit 400 is pulled to the right side, the gap between the left outer fixed unit 500 and the right outer fixed unit 400 becomes wide, The overlapping portions of the bars 100 and 200 are narrowed. When the left outer fixed unit 500 is pushed to the right and the right outer fixed unit 400 is pushed to the left, the gap between the left outer fixed unit 500 and the right outer fixed unit 400 becomes narrow, The overlapping portions of the support bars 100 and 200 are widened.

The first connecting members 700 are coupled to the first supporting bar 100 to be positioned on the left outer fixed unit 500 side. It is preferable that the first connecting members 700 are two. It is preferable that the two first connection members 700 are positioned on the first support bar 100 located at both ends of the first support bars 100, respectively. The first connection member 700 includes a fixed support plate 720 formed to have a predetermined width and length and inserted into the first support bar 100, a fixed support plate 720 And a connecting plate portion 730 extending from an end of the plate portion 730 and having an opening groove G therein. The fixed support plate 720 of the first locking member 710 is inserted into the first support bar 100 and fastened by screws or bolts. The opening groove G of the connecting plate portion 730 opens horizontally. That is, in the longitudinal direction of the first supporting bar 100.

The first engaging member 710 is provided on the first connecting member 700 to adjust the width of the opening groove G of the first connecting member 700. The first engaging member 710 is located above the opening groove G of the first connecting member 700. The first latching member 710 includes a body plate portion 711 formed in an arc shape and having a uniform thickness and a through hole 711 formed at one end of the body plate portion 711 in an arc- And a first arcuate through groove 712 into which the fixing pin 731 is inserted. The fixing pin 731 is provided on the first latching member 710. The first arcuate through groove 712 is formed so that the center of curvature radius thereof is located opposite to the center of curvature radius of the body plate portion 711. And a second arcuate through groove 713 formed in an arc-shaped through-hole at the other end of the body plate 711. When the fixing pin 731 is positioned on one side of the first arcuate through groove 712 of the first locking member 710, the first locking member 710 is fixed to the lower side of the fixing pin 731 The fixing pin 731 is positioned on the other side of the first arcuate through groove 712 when the other side of the first engaging member 710 is pushed upwardly The first engaging member 710 opens the opening groove G. [

The second connecting members 800 are coupled to the second supporting bar 200 so as to be positioned on the right outer fixed unit 400 side. It is preferable that the second linking members 800 are two. It is preferable that the two second connecting members 800 are respectively disposed on the second supporting bar 200 located at both ends of the second supporting bars 200. The second connection member 800 is preferably formed to have the same shape and size as the first connection member 700.

The second latching member 810 is provided on the second linking member 800 to adjust the width of the opening groove G of the second linking member 800. The second latching member 810 is located above the opening groove G of the second linking member 800. The second engaging member 810 is preferably formed to have the same shape and size as the first engaging member 710.

Hereinafter, the operation and effect of the horizontal stool for the boiler tube structure of the thermal power plant according to the present invention will be described.

6, when the distance between the two tubes 11 positioned at a distance from each other in the boiler tube structure 10 is narrow, the left outer fixed unit 500 is pushed to the right and the right outer fixed unit 400 are pushed to the left to adjust the distance between the first and second connecting members 700 and 800 to match the spacing of the two tubes 11 and then to the opening groove G of the first connecting members 700, The tube 11 is inserted and another tube 11 is inserted into the opening groove G of the second linking members 800. The first engaging member 710 of the first connecting member 700 closes the opening groove G of the first connecting member 700 and the second engaging member 810 of the second connecting member 800 The opening groove G of the second connecting member 800 is closed. In this way, the horizontal footrest of the present invention is installed between the two tubes 11 of the boiler tube structure 10. Since the horizontal scaffolds of the present invention are installed between the two tubes 11, the operator can move on the upper surface of the first and second support bars 100 and 200 of the horizontal scaffold. The operator will examine or repair the boiler tube structure 10 while moving along the horizontal footboards of the present invention.

7, when the distance between two tubes 11 positioned at a distance from each other in the boiler tube structure 10 is large, the left outer fixing unit 500 is pulled to the left side and the right outer side fixing unit The first and second connecting members 700 and 800 are pulled to the right to adjust the gap of the first and second connecting members 700 and 800 to match the spacing of the two tubes 11, The tube 11 is inserted and another tube 11 is inserted into the opening groove G of the second linking members 800. The first engaging member 710 of the first connecting member 700 closes the opening groove G of the first connecting member 700 and the second engaging member 810 of the second connecting member 800 The opening groove G of the second connecting member 800 is closed. In this way, the horizontal footrest of the present invention is installed between the two tubes 11 of the boiler tube structure 10.

The present invention is characterized in that the second support bars 200 are arranged between the first support bars 100 such that the first support bars 100 are spaced apart and alternate with the first support bars 100, The distance between the first and second connecting members 700 and 800 is adjusted by pushing and pulling the supporting bars 100 and the second supporting bars 200 so that the tube 11 of the boiler tube structure 10 is rotated, As shown in FIG.

The first supporting bars 100 and the second supporting bars 200 are alternately positioned and the first supporting bars 100 and the second supporting bars 200 overlap each other The distance between the first and second connecting members 700 and 800 is adjusted so that even when the distance between the first and second connecting members 700 and 800 is narrow or wide, 2 support bars 200 support the operator so that the operator can safely move.

Since the opening grooves G provided in the first and second connecting members 700 and 800 are opened horizontally in the present invention, the two tubes 11 of the boiler tube structure 10 The first and second connecting members 700 and 800 are provided with the first and second fastening members 710 and 810 so that the two tubes 11 of the boiler tube structure 10 can be easily assembled, The first and second connecting members 700 and 800 are not easily separated from the tube 11, thereby preventing a safety accident.

100; A first support bar 200; The second support bar
300; Right inner fixing unit 400; Right outer fixed unit
500; A left outer fixing unit 600; Left inner fixed unit
700; A first connecting member 710; The first latching member
800; A second connecting member 810; The second engaging member

Claims

First support bars arranged in a line at intervals from each other;
Second support bars movably positioned between the first support bars;
A right inner fixed unit connecting and fixing one ends of the first support bars;
A right outer fixing unit which is located outside the right inner fixing unit and connects and fixes one ends of the second supporting bars;
A left outer fixing unit connecting and fixing the other ends of the first supporting bars;
A left inner fixed unit positioned inside the left outer fixed unit and connecting and fixing the other ends of the second supporting bars;
First connection members coupled to the first support bar to be positioned on the left outer fixed unit side and having an opening groove at an end thereof;
A first engaging member provided on the first linking member to adjust a width of the opening groove of the first linking member;
Second connection members coupled to the second support bar to be positioned on the right outer fixed unit side and having an opening groove at an end thereof; And
And a second latching member provided on the second linking member and adjusting a width of the opening groove of the second linking member.

[2] The horizontal footrest according to claim 1, wherein the first and second support bars have a rectangular cross-sectional shape or a rectangular shape with an open bottom.

[2] The apparatus of claim 1, wherein the right inner fixation unit comprises: an upper connection plate connecting upper end portions of the first support bars; a lower connection plate connecting lower end ends of the first support bars; And a fastening unit for fastening the upper and lower connecting plates to the upper and lower connecting plates, respectively.

[2] The apparatus of claim 1, wherein the right outer fixed unit comprises: an upper connection plate connecting upper end portions of the second support bars; a lower connection plate connecting lower end ends of the second support bars; And a fastening unit for fastening the upper and lower connecting plates to the upper and lower connecting plates, respectively.

The apparatus as claimed in claim 1, wherein the left outer fixing unit comprises: an upper connecting plate connecting upper end portions of the first supporting bars; a lower connecting plate connecting lower end ends of the first supporting bars; And a fastening unit for fastening the upper and lower connecting plates to the upper and lower connecting plates, respectively.

[2] The apparatus of claim 1, wherein the left inner fixation unit comprises: an upper connection plate connecting upper end portions of the second support bars; a lower connection plate connecting lower end ends of the second support bars; And a fastening unit for fastening the upper and lower connecting plates to the upper and lower connecting plates, respectively.

[2] The apparatus according to claim 1, wherein the first and second locking members are formed in a circular arc shape and have a uniform thickness, and a first circular plate having an arc- Horizontal scaffolding for boiler tube structures in thermal power plants including arc-shaped grooves.