JP2003343081A - Protective fence doubling as scaffolding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and rapidly install and remove scaffolding for maintenance inspection on the periphery of equipment such as a gas turbine unit 50. <P>SOLUTION: A base part 10 of a protective fence 3 for being coupled to the equipment side of a passage trestle 2 is turnably coupled to the passage trestle 2; and the protective fence 3 is supported from below by a supporting member 12 after being turned from a vertical state to a horizontal state. The scaffolding 40 is formed by laying a curing plate 46 on the protective fence 3 in the horizontal state from the passage trestle 2. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence connected to a passage mount disposed on the side of equipment such as a turbine and a generator, and more particularly to a protective fence that can also be used as a scaffold necessary for maintenance and inspection of equipment.

[0002]

2. Description of the Related Art Equipment such as turbines, generators, and other large rotating devices are precision devices that rotate at high speed and are enclosed in compartments during operation. The interior of the compartment is hot and cannot be entered by anyone involved. To check the inside of the compartment, open the small window installed in the door for entering and exiting the compartment. When entering inside the compartment, the gas turbine is shut down and a certain cooling time is required. When working inside a compartment, as a general rule, entry is restricted to those involved. In order to prevent workers and related persons from falling from the safety corridor during work, a protective fence will be installed to prevent falling accidents.

FIG. 5 is a schematic explanatory view of a conventional safety passage provided around a gas turbine device as an example of equipment. The gas turbine device 50 includes a compressor that compresses air, a combustor that mixes and burns compressed air and fuel from the compressor, and a gas turbine that rotates by high-temperature and high-pressure gas generated in the combustor. It is installed as an integrated unit. Note that in FIG. 5, a gas turbine casing 51 in the gas turbine device 50,
Lower half 5 of the compressor casing connected to it
2, the upper half 53 of the compressor casing, a plurality of combustors 54, a pigtail pipe 55 connected to the combustors 54, and the like are shown.

The gas turbine device 50 is installed in a gas turbine compartment of a building, and the safety passage 1 is installed along the inside of an outer wall 60 of the gas turbine compartment. The safety passage 1 includes a passage mount 2 assembled on a floor plate 61 such as an iron plate and a protective fence 3 connected to the facility side of the passage mount 2. The passage platform 2 has a plurality of leg portions 4 standing from a floor plate 61 at predetermined intervals along the longitudinal direction of the safety passage 1, and a footboard 5 laid on each leg portion 4,
The protective fence 3 extends along the longitudinal direction of the safety passage 1 and is composed of a plurality of vertical members and a handrail and a horizontal member that connect their tops and intermediate portions to each other. And protection fence 3
The roots of the respective vertical members constituting the above are connected to the leg portion 4 or the step plate 5 of the passage mount 2 with bolts.

The gas turbine apparatus 50 needs to be inspected and maintained regularly or as needed. In particular, when disassembling for internal inspection or repair, it is necessary to install a work scaffold adjacent to the safety passage 1. In that case, the work is carried out by using the safety passage 1 to move to the scaffold from the outside. However, since the protective fence 3 is connected to the safety passage 1, remove the protective fence before installing the scaffold.

FIG. 6 shows a scaffold 4 adjacent to the safety passage 1 of FIG.
It is a typical explanatory view in the state where 0 was installed. In order to install the scaffold 40, first, the bolts connecting the safety passage 1 and the protective fence 3 are removed, the protective fence 3 is pulled upward as shown in the drawing, and stored in another place. Next, the scaffold 40 is assembled adjacent to the safety passage 1.

The scaffold 40 has a plurality of leg portions 41 arranged in two rows at predetermined intervals, upper and lower horizontal connecting members 42 for horizontally connecting the two row leg portions 41, and contacting each horizontal connecting member 42. The upper and lower vertical connecting members 43 are provided, the horizontal connecting members 42 and the orthogonal clamps 44 connecting the vertical connecting members 43 to the leg portions 41, and the scaffolding plate 45 laid on the upper vertical connecting members 43. Then, by installing a protective curing plate 46 on the upper surfaces of the footboard 5 and the scaffolding board 45 of the safety passage 1, the installation of the scaffolding 40 is completed. A base 47 is arranged at the bottom of each leg 41, and a single pipe or the like is used for the horizontal connecting member 42 and the vertical connecting member 43.

Next, with reference to FIGS. 5 and 6, a procedure for maintenance and inspection of the compressor portion of the gas turbine apparatus 50 will be described below. (1) Remove the combustor 54 and the pigtail pipe 55. (2) Remove the protective fence 3. (3) The base 47 is installed, each leg part 41 is connected to it, and the horizontal connecting member 42 and the vertical connecting member 43 are connected to these leg parts 41.
Are connected by an orthogonal clamp 44. (4) Using a horizontal leveler, check the levelness of the upper vertical connecting member 43. (5) The number line is cut into an appropriate length with a cutter or the like, and the scaffold plate 45 is fixed to the upper vertical connecting member 43 with the number line. The fixing work is performed using, for example, the ratchet portion of the ratchet.

(6) Next, the curing plate 46 is laid on the scaffolding plate 45 and the step plate 5 of the safety passage 1. (7) After installing the scaffold 40 as described above, the upper half 53 of the compressor casing is removed, and the work inside the compressor is performed. (8) When the work inside the compressor is completed, the upper half 53 of the compressor casing is assembled. (9) Remove the curing plate 46, cut the number wire with a cutter, and remove the scaffolding plate 45.

(10) Using the ratchet, the orthogonal clamp 44 is removed, the horizontal connecting member 42 and the vertical connecting member 43 are removed, and finally the leg portion 41 and the base 47 are removed. (11) Attach the protective fence 3 to the safety passage 1. (12) The combustor 54 and the pigtail pipe 55 are attached to complete the work.

[0011]

The periphery of equipment that rotates at a high speed such as the gas turbine apparatus 50 is generally designated as a "foreign matter entry prohibited area" and is restricted from entry by persons other than those concerned and required tools, Strict control is done to prohibit bringing in anything other than materials. When a worker enters the area, it is obliged to fill in the recording sheet with the name, company name, entry time, exit time, etc. of the entry person.

When bringing in tools and materials, it is obligatory to fill in the recording sheet with the name of the person carrying in the company, the company name, the name of the tool (material), the quantity, the carry-in time, the carry-out time and the like. Furthermore, as a general rule, workers' clothes should be restricted to wearing pocketless work clothes, safety helmets, and safety shoes, and if you wear leather gloves, safety belts, etc., enter them on the recording sheet.

Assembling and removing the scaffold 40 requires a large amount of materials and tools and a large number of workers to enter. Due to the work process in a short period of time, human error such as misplacement of tools is likely to occur. Therefore, the installation work of the complicated scaffold 40 in the "foreign matter contamination prohibited area" is not preferable from the viewpoint of maintaining a strict management system, and its improvement has been strongly desired. Therefore, it is an object of the present invention to reduce the number of workers and the number of workers to carry in materials and tools when installing scaffolds, and to reduce the working time and the number of working steps.

[0014]

The present invention is to solve the above-mentioned problems by using the protective fence 3 which constitutes the safety passage 1 also as a scaffold. That is, according to the present invention, the root portion of the protection fence connected to the equipment side of the passage mount is rotatably connected to the passage mount, and the protection fence is rotated horizontally and supported by the support member from below. It is characterized in that a scaffold can be formed by using. (Claim 1)

In the above-mentioned protective fence, a root mechanism is rotatably connected to the passage pedestal by a connecting body, and the connecting body locks a state in which the protective fence is vertically rotated with respect to the passage pedestal. A lock releasing means for releasing the lock can be provided. (Claim 2)

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram illustrating an embodiment in which the protective fence according to the present invention is also used as a scaffold in the “foreign matter mixture prohibited area” of the gas turbine device 50. In addition, FIG.
The same parts as those in FIG. 6 are designated by the same reference numerals, and the duplicated description will be omitted.

In FIG. 1, the safety passage 1 comprises a passage mount 2 assembled on a floor plate 61 such as an iron plate and a protective fence 3 connected to the equipment side of the passage mount 2. The passage pedestal 2 has a plurality of legs 4 and a tread 5, and the root 10 of the protective fence 3 is rotatably connected to the legs 4 on the facility side of the passage pedestal 2 by a plurality of connecting bodies 11. The specific structure of the connecting body 11 will be described later.

The protective fence 3 is erected vertically on the equipment side of the aisle platform 2 when the equipment is in operation, as in the case of FIG. Then, the scaffold 40 is formed by horizontally rotating the protective fence 3 as shown in the figure and supporting it from below with the support member 12. The support member 12 is composed of a plurality of legs 13 arranged vertically at a predetermined interval on the ground, and a connecting member 1 provided at the bottom of each leg 13.
4 and a base 1 made of steel or the like for supporting the connecting member 14.
Have 5.

The base 15 is fixed to the floor plate 61 in advance by welding or the like, and each leg portion 13 has a bolt 16 attached to the base 15.
Is detachably connected. Then, the scaffold 40 is completed by laying the curing plate 46 on the protection fence 3 which is leveled from the passage platform 2. The curing plate 46 may be omitted in some cases.

FIG. 2 shows a root portion 10 of the protective fence 3 and a connecting body 11.
2 is a cross-sectional view of the concrete connection structure of FIG. 1, showing a state in which the protective fence 3 is erected vertically on the passage mount 2. Connector 11
Is a short square pipe-shaped stopper 26 fixed to the leg portion 4 of the safety passage 1 by welding or the like, and a lower square rod-shaped fixed side clamp 17 that is vertically movably inserted into the stopper 26.
It has an upper side rectangular rod-shaped free side clamp 18. A pull-out prevention plate 19 is fixed to one lower end of the fixed-side clamp 17 with a fixing bolt 20, and through holes 21, 22, and 23 are provided near the lower end, near the intermediate portion, and near the upper end portion, respectively.
A bifurcated curved protrusion 24 is formed at the upper end thereof.

A fixing pin 25 is inserted into and retractable from a through hole 22 at the center of the fixed side clamp 17. Also,
Through holes are also formed on both sides of the square pipe-shaped stopper 26, and the fixing pin 25 is insertably inserted therein. As shown in FIG. 4, a side-curved protrusion 27 is formed at the tip of the free-side clamp 18, and a through hole is provided in the center of the protrusion 27. Then, the through hole 23 of the fixed side clamp 17 and the through hole of the free side clamp 18 are aligned with each other and the connecting pin 28
The free-side clamp 18 is rotatably connected to the fixed-side clamp 17 by inserting.

In the state shown in FIG. 2, since the rotation of the free-side clamp 18 is restricted by the stopper 26 in the form of a square pipe, the protective fence 3 extending from the free-side clamp 18 stands upright on the passage frame 2 in a locked state. It is set up. This constitutes a lock mechanism 30 for locking the protective fence 3 in a state in which it is perpendicular to the passage mount 2.

Next, a procedure for horizontally rotating the protective fence 3 which is vertically locked as described above to form a scaffold will be described with reference to FIGS.
The description will be made with reference to FIG. First, in the state of FIG. 2, the fixing pin 25 is pulled out from the through hole 22, and
As shown in FIG.
Touch the lower end of the stopper 26, align the through hole 21 on the lower side of the fixed side clamp 17 with the through hole of the stopper 26, and insert the fixing pin 25 into the hole. Then, the free side clamp 18 is released from the stopper 26, and the lock is released. This is the unlocking means 31 of the protective fence 3.
Make up.

Next, as shown in FIG. 4, when the free-side clamp 18 and the protective fence 3 connected thereto are horizontally rotated, the protective fence 3 is supported by the support member 12 from below as shown in FIG. Become. That is, as shown in FIG. 1, a plurality of leg portions 13 are fixed to a base 15 which is fixed to the upper surface of the floor plate 61 in advance via bolts 16, and the protective fence 3 is a top portion of each of the vertically arranged leg portions 13. Stable from below.

Next, a procedure for carrying out maintenance and inspection work inside the compressor of the gas turbine apparatus 50 using the scaffolding that also serves as the protective fence of the present invention will be described. (1) Remove the combustor 54 and the pigtail pipe 55. (2) The support member 12 is installed by fixing the plurality of leg portions 13 with the bolts 16 to the base 15 that is fixed to the floor plate 61 in advance. (3) The upper part of the protection fence 3 connected to the passage mount 2 is temporarily supported by a suitable rope, and the connection body 11 of the protection fence 3 is changed from the state of FIG. 2 to the state of FIG. (4) While loosening the rope, the protective fence 3 is horizontally rotated to the state shown in FIG. 4, and the lower portion thereof is supported by the support member 12, and then the rope is removed. (5) Laying a curing plate 46 on the protective fence 3.

(6) After installing the scaffold 40 as described above, the upper half 53 of the compressor casing is removed, and the work inside the compressor is performed. (7) When the work inside the compressor is completed, the upper half 53 of the compressor casing is assembled. (8) After removing the curing plate 46, the protective fence 3 is temporarily supported by a rope and gradually rotated in the vertical direction to cause it. Then, the connection body 11 of the protective fence 3 changes from the state of FIG. 4 to the state of FIG. (9) After the connection body 11 of the protective fence 3 is changed from the state of FIG. 3 to the vertical lock state of FIG. 2, the rope is removed from the protective fence 3. (10) Attach the combustor 54 and the pigtail pipe 55.

[0027]

As described above, the scaffolding using the protective fence of the present invention is extremely easy to install and remove, and the number of people required for scaffolding installation and removal work, work time and man-hours required to be reduced, and materials and tools to be brought in It has excellent effects such as reduction of type and human error during work. Especially, the effect is great for the maintenance and inspection of equipment that needs to be completed in a short period of time.

In the above-mentioned protective fence, the lock mechanism has a root portion rotatably connected to the passage pedestal by a connecting body, and locks the state in which the protective fence is vertically rotated with respect to the passage pedestal to the connecting body. An unlocking means for unlocking can be provided. According to this structure, the protective fence of the safety passage can be converted into a scaffold more quickly and efficiently, and the original protective fence can be restored.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating an embodiment in which a protective fence according to the present invention is also used as a scaffold in a “foreign matter mixture prohibited area” of a gas turbine device 50.

2 is a base portion 10 and a connecting body 11 of the protective fence 3 shown in FIG.
FIG. 4 is a cross-sectional view specifically showing the connection structure of

FIG. 3 is a cross-sectional view of a state in which the rotation lock of the protective fence 3 is released from the state of FIG.

4 is an explanatory view of a state in which the protective fence 3 is horizontally rotated from the state of FIG.

FIG. 5 is a schematic explanatory view of a conventional safety passage 1 provided along a gas turbine device as an example of equipment.

6 is a schematic explanatory view of a state in which a scaffold 40 is installed adjacent to the safety passage 1 in FIG.

[Explanation of symbols]

1 safety passage 2 passage mounts 3 protective fence 4 legs 5 Footboard 10 root 11 connected body 12 Support member 13 legs 14 Connection member 15 base 16 volts 17 Fixed side clamp 18 Free side clamp 19 Pull-out prevention plate 20 fixing bolt 21-23 through holes 24 Projection 25 fixing pin 26 Stopper 27 Projection 28 Connecting pin 30 lock mechanism 31 unlocking means 40 scaffolding 41 legs 42 Horizontal connection member 43 Vertical connection member 44 Cartesian clamp 45 scaffolding board 46 Curing board 47 base 50 gas turbine equipment 51 gas turbine casing 52 Lower half of compressor casing 53 Upper half of compressor casing 54 Combustor 55 pigtail tube 60 outer wall 61 floor board

Claims (2)

[Claims] 1. In a protection fence 3 connected to the equipment side of a passage mount 2, a root portion 10 of the protection fence 3 is rotatably connected to the passage mount 2 to rotate the protection fence 3 in a horizontal state. A scaffolding / combined protective fence, characterized in that the scaffold 40 can be formed by supporting the scaffolding 12 from below. 2. The base portion 10 of the protection fence 3 is rotatably connected to the passage pedestal 2 by a connecting body 11, and the protection fence 3 is vertically attached to the connection body 11 with respect to the passage pedestal 2. A lock mechanism 30 for locking the state of being rotated to
A scaffolding protective fence, characterized in that lock releasing means 31 for releasing the lock is provided.