KR101288744B1 - Scaffoldings for the Scrubber - Google Patents

Abstract

The conventional absorption tower internal scaffold opens the tank manhole 60 entering the absorption tower, inserts a steel pipe scaffold into them so that they cross vertically and horizontally, and bolts using a clamp at the intersection to fix the internal space of the absorption tower. Fills. It is common practice to install the scaffolding as a whole to the lower part of the gas gas heater (hereinafter referred to as "gas gas heaters 20"), which is a heat exchanger installed for controlling the temperature of the combustion gas at the upper end of the absorption tower tanks. to be. Since upper and lower portions of the gas gas heaters are provided with support grids for structural safety of the absorption tower tanks, scaffolding and working scaffolding should be provided up to the support grids 30 for the maintenance of the gas gas heaters. do.
Therefore, in the present invention, even if only a partial section is installed without installing the scaffolding in the entire absorption tower tanks, it is intended to install the scaffolding in the entire area required. In addition, in order to maintain gas and gas heaters, the scaffold should be installed or dismantled on the support grid 30 (hereinafter referred to as “support grid scaffolding”). In some cases, the lower space is empty. Even in the above work platform should be installed / dismantled. This is closely related to the operating hours of power plants, so making this work safe and fast is directly related to the management efficiency of power plants. However, since the lower part of the support grid 30 is empty, there is a risk of falling of the worker and the construction material, so it is absolutely necessary to introduce a method of preventing the worker and the construction material from falling and safely working. Therefore, in the present invention, the support grid scaffolding work safely and quickly through a method in which the worker is not exposed to the upper portion of the empty space through a method of pushing the working scaffold into the space while the worker is located at one end of the support grid 30. I could do it.

Description

Block scaffolding system for work such as absorption tower tank maintenance {Scaffoldings for the Scrubber}

The present invention relates to a method for quickly and safely installing and dismantling scaffolding and scaffolding for the maintenance work in tanks, such as absorption towers of flue gas desulfurization facilities such as thermal power plants and heavy chemical facilities, than conventional methods. will be.

Large tanks (such as absorption towers), which are one of the desulfurization facilities that remove sulfur components in the exhaust gases generated during operation of power plants, petrochemical plants, and steel mills (hereinafter referred to as “power plants”). The scaffolding installed during the construction, maintenance, improvement and inspection (hereinafter referred to as "maintenance") of the tanks is directly related to the operating time of the power plant, so it is necessary to reduce the working time absolutely. There is. If these scaffolds are not installed quickly and safely, the cost of downtime of the equipment with huge assets is enormous. If the scaffold installation time is shortened, the facility utilization rate will increase accordingly.

Increasing the utilization rate of large facilities by making the process of installing and dismantling scaffolding and scaffolding efficiently and safely inside the absorption tower tanks can be achieved. The present invention relates to a method for installing and dismantling the scaffolding and working scaffold more quickly and safely than conventional methods for the maintenance of the inside of the absorption tower tanks.

The conventional absorption tower internal scaffold opens the tank manhole 60 entering the absorption tower, inserts a steel pipe scaffold into them so that they cross vertically and horizontally, and bolts using a clamp at the intersection to fix the internal space of the absorption tower. Fills. It is common practice to install the scaffolding as a whole to the lower part of the gas gas heater (hereinafter referred to as "gas gas heaters 20"), which is a heat exchanger installed for controlling the temperature of the combustion gas at the upper end of the absorption tower tanks. to be. Since upper and lower portions of the gas gas heaters are provided with support grids for structural safety of the absorption tower tanks, scaffolding and working scaffolding should be provided up to the support grids 30 for the maintenance of the gas gas heaters. do.

Therefore, in the present invention, even if only a partial section is installed without installing the scaffolding in the entire absorption tower tanks, it is intended to install the scaffolding in the entire area required. In addition, in order to maintain gas and gas heaters, the scaffold should be installed or dismantled on the support grid 30 (hereinafter referred to as “support grid scaffolding”). In some cases, the lower space is empty. Even in the above work platform should be installed / dismantled. This is closely related to the operating hours of power plants, so making this work safe and fast is directly related to the management efficiency of power plants. However, since the lower part of the support grid 30 is empty, there is a risk of falling of the worker and the construction material, so it is absolutely necessary to introduce a method of preventing the worker and the construction material from falling and safely working. Therefore, in the present invention, the support grid scaffolding work safely and quickly through a method in which the worker is not exposed to the upper portion of the empty space through a method of pushing the working scaffold into the space while the worker is located at one end of the support grid 30. I could do it.

In the present invention, when installing the scaffold in the absorption tower tanks, the assembly / disassembly time is faster than the previous scaffold, and a safer scaffold can be constructed, and the operation rate of heavy chemical equipment such as a power plant can be further increased. It became.

1 is an example of an embodiment of a plan view of the scaffold and scaffold in the absorption tower tank according to the present invention
Figure 2 is an example of an embodiment cross-sectional view of the scaffold and scaffold in the absorption tower tank according to the present invention
Figure 3 is an embodiment of a scaffolding tower according to the prior art
Figure 4 is a comparison example of the scaffolding tower and the conventional scaffolding tower according to the present invention
Figure 5 is an embodiment of a half moon scaffold according to the present invention
Figure 6 is an embodiment of the absorption tower tank scaffolding and scaffolding according to the present invention
Figure 7 is an embodiment of a remote clamp according to the prior art
8 is an embodiment of a sliding footrest according to the present invention
Figure 9 is an embodiment of the footrest hook according to the present invention
10 is a structural example of absorption tower tanks according to the present invention;

The present invention is to quickly and safely install and dismantle the scaffolding and work scaffolding essential for the work such as the internal maintenance of the absorption tower tanks that are installed and operated in power plants, etc.

Forming prefabricated block structure by combining vertical column and horizontal part, it is used for construction scaffolding to be used for scaffolding of many equal size vertical members and cross-pieces of horizontal structural members of same size, tripod, scaffolding, stairs and rigidity A symmetrical scaffolding step of constructing a plurality of scaffolding towers 11 having braces as a main component to reinforce the symmetrical structure at a predetermined distance inside the absorption tank tanks;

The side girders 12 are assembled between the adjacent scaffold towers in a state where the scaffold towers are installed in a lattice form at a predetermined distance, and the intermediate girders 15 are assembled between the side girders 12, and the side girders are installed. And fixing the scaffold tower cross-section inner space of the scaffold tower, which is constructed in a lattice form, by assembling a scaffold for a scaffolding work that can use a normal scaffold or a sliding scaffold according to the present invention between the middle girder or the middle girder and the middle girder. Scaffolding installation steps

Inclined pipe, C, which is a common steel pipe between the inner surface of the absorption tower tank and the outer surface of the scaffold tower installed in the lattice type scaffolding step and the side girders 12 assembled therebetween the half moon scaffolding 13 and the scaffold tower, C The lower scaffold of absorber tanks is constructed by installing the half-sized scaffolding step of filling the inclined support portion 14 having the horizontal pipe and the brace pipe with the remote clamp M in the shape of the magnetic hook plate. ,

The sliding scaffold having the scaffold skeleton 51, the scaffold 52, the scaffolding hook 53 and the scaffolding roller R, the scaffold spring S, and the scaffold stator T as main components to the support grid 30. To build the upper scaffolding of the absorption tower tanks through the support grid scaffolding step of pushing the (50) to one end of the absorption tower tanks to perform the support grid scaffolding step;

It is a patent for a method for quickly and safely assembling and disassembling scaffolding and scaffolding inside an absorption tower tank.

This will be described in detail as follows.

Forming prefabricated block structure by combining vertical column and horizontal part, it is used for construction scaffolding to be used for scaffolding of many equal size vertical members and cross-pieces of horizontal structural members of same size, tripod, scaffolding, stairs and rigidity The symmetric scaffolding step of constructing a plurality of scaffolding towers 11 having braces as a main component to reinforce them symmetrically at a predetermined distance inside the absorption tower tanks is illustrated in FIG. 3. To construct a scaffolding or prefabricated scaffolding, the scaffolding column described in "Patent Scaffolding and Block Scaffolding with a Wheelbarrow and a Self-Assembly Scaffold for Operation During Assembly and Assembly on Uneven Floors" as described in his patent 10-2010-0089773 It can be applied, but instead of erecting the four vertical poles applied in the conventional block scaffold as shown in (1) of [4] in (2) of [4] As shown in the figure, three cross bars are used, and two cross bars and a triangular bar are used to construct a cross section of the scaffolding column into a triangular shape. The method of fastening between the scaffold structures is fastened according to the above patent 10-2010-0089773 having a wedge-shaped assembly system without using a conventional scaffold clamp in interconnecting a horizontal member such as a crossbar and a vertical member such as a longitudinal bar for quick operation. This can be done by using an instrument or by using a commercially available fastener. This scaffolding assembly will be understood by anyone skilled in the art of designing or assembling a general scaffolding structure, and thus will not be described in detail.

Side scaffolds (also referred to as 12, girder, horizontal truss or horizontal beams) are commonly used between the adjacent scaffold towers in a state in which the scaffold towers are installed in a grid shape at a certain distance, and thus the term “girder” is commonly used. ) Assembled with each other, the intermediate girders 15 are assembled between the side girders 12, and the following sliding scaffold 50 is assembled between the side girders and the intermediate girders or the intermediate girders to form the lattice. The step of installing the fixed floor scaffold to fill the space inside the cross section of the scaffolding tower constructed with the following can be carried out as follows.

As shown in FIG. 1, the bottom fixed scaffold installation step has four scaffold towers 11 arranged in a state such that a space (typically about 30 cm) does not fall on the inner wall of the absorption tower tanks. do. The side girders 12, the length of which is determined by the distance to which the scaffold towers can be interconnected, have a truss structure having fastening mechanisms for allowing both ends of the side girders facing the scaffold towers to be combined as quick fastening mechanisms. As long as the worker and working loads are raised, the structure can be firmly supported by the strength of the structure. In the case of carrying out the example of FIG. 1, it can be seen that eight side girders 12 are required. The facing scaffold tower 11 requires two side girders 12 as shown in FIG. 1, but the four side scaffold towers are not on the wall side of the double absorption tower tanks but on the side girders facing the center of the absorption tower tanks. An intermediate girder 15 is needed to fill the interior space of 11). It is needless to say that both ends of the intermediate girders 15 should have fastening mechanisms which can be interlocked with the side girders facing the center of the absorbent tab tanks. Of course, the intermediate girders also have side girders in contact with the intermediate girders. It is too natural that the fastening mechanism for fastening with the above will not be described anymore. The interval between the side girders and the intermediate girder arranged in this way is equal to the length of the conventional scaffolding scaffolding, and the fixed scaffolding used for the following sliding scaffolding 50 or the conventional scaffolding is installed as shown in FIG. 1.

  Inclined pipe, C, which is a common steel pipe between the inner surface of the absorption tower tank and the outer surface of the scaffold tower installed in the lattice type scaffolding step and the side girders 12 assembled therebetween the half moon scaffolding 13 and the scaffold tower, C The half moon-shaped scaffold installation step of filling the horizontal pipe and the brace pipe with the inclined support 14 as the main constituent member having the remote clamp M in the form of a magnetic hook plate at one end may be performed as follows.

  When the cross section and side girders of the scaffold tower, which is a linear structure, are integrated inside the absorption tower tanks having a circular cross section, the connection characteristics between the members are as shown in [Fig. 5], and the outside of the side girders as shown in (1) of [Fig. 5]. Space will be generated. This part can be an opening part in the high altitude, which can cause the fall of workers, materials, equipment, etc., and the part must be covered with scaffold because the worker must be accessible to work on the wall of absorber tanks. To this end, the vandal-shaped vandal scaffold 13 shown in (2) of FIG. 5 is formed as a large scaffold integrated by using a conventional structural steel and a plate, and made into a cross section to fill the outer space of the side girder. With the vertical vertical member quick fastening means at both ends and intermediate points in the direction, the part where it meets the scaffolding tower is supported by the longitudinal pole of the scaffolding tower, and the one which floats in the air is supported by the inclined support part 14 having the remote clamp [ As shown in FIG. 2 and FIG. 6, the vandal scaffold is supported in an inverted triangle shape. The shape of the half-moon scaffold need not necessarily follow the circumference as shown in [FIG. 5], and may be triangular or polygonal as shown in [FIG. 1] for convenience of manufacture and use. In addition, the distance between the outer ring of the half moon scaffold and the inner wall of the absorber tanks is usually 30 cm to be a suitable distance to eliminate the possibility of work, the possibility of interference between structures, and the possibility of falling of workers and materials. The vandal type scaffolding does not necessarily have to be a single structure integrated as described above, and is also carried out by a method of assembling a second or a small scaffolding to a shape in consideration of size and work convenience, and assembling it on site. can do.

The inclined support portion is applied in the reverse direction of the inclined support portion described in the "Assembly method of the block scaffolding and block scaffolding with a wheelbarrow and a self-assembled scaffold that is operated during assembly and movement on an uneven bottom surface" of the patent 10-2010-0089773 It can be carried out.

Sliding scaffold having the scaffolding skeleton (51), scaffolding plate 52, scaffolding hook (53) and scaffolding roller (R), scaffolding spring (S), scaffold stator (T) as a main component to the support grid 30 ( The step of constructing the support grid scaffold, which is carried out by pushing 50) at one end of the absorber tanks and performing the entire support grid scaffolding, can be carried out as follows.

  A scaffold having a length equal to the spacing of the equally spaced support grids is produced as shown in FIG. 8. The scaffold should slide along the horizontal structure of the support grid so that the operator can push along the horizontal structure of the support grid, which is an empty space at the bottom of the absorber tank at one end or at a specific intermediate point. To this end, a scaffolding roller R which can slide along the horizontal structural member in the scaffolding hook portion of the scaffold consisting of the scaffolding frame 51, the scaffolding plate 52, and the scaffolding hook 53 like the conventional scaffolding [FIG. 8] ]. However, since the footrest should not slide in the state of being placed, the foothold stably stops or rotates the foothold roller as the foothold stator T, and the foothold spring S can slide in the normal state. Lower the roller (R) below the bottom of the footrest hook. The structure that enables the sliding of the footrest or the non-slip can be seen through the footrest hook detail shown in FIG. 9, wherein one end of the foothold spring S is fixed to a predetermined position of the footrest spring ( The spring is rotatable by the FF, and the footrest holder is configured to rotate about the roller hinge FH fixed at a predetermined position of the footrest hook. The scaffolding stator is provided with a stopper for controlling a position although not shown in the drawing so as to rotate only a predetermined angle about the roller hinge. The structure that allows the sliding scaffold 50 to slide is a case where the scaffolding roller R descends by the force of the spring spring S as shown in (2) of FIG. ] (1), if you press the scaffolding stator (T) for a long time under the fixing pin (FP) and then push the pin or stick out, the scaffolding roller will rise up and lose the function of the roller, and the sliding scaffold will not be able to move. . The scaffolding hook components of this sliding scaffold can construct various link mechanisms based on the above descriptions, which can be implemented by anyone skilled in the art of mechanical components, and thus have not been described in detail and the applied structure has not been described. It is obvious that all the technology based on the present invention is included in this patent.

The structure of the absorption tower tank 10, the gas gas heater 20, the support grid 30, the tank manhole 60 and the like related to the present invention is illustrated in FIG.

DESCRIPTION OF THE REFERENCE NUMERALS
10: absorption tower tanks
20: gas gas heater
30: support grid
40: scaffolding tower
50: sliding foot
60: tank manhole

Claims (3)

Forming prefabricated block structure by combining vertical column and horizontal part, it is used for construction scaffolding to be used for scaffolding of many equal size vertical members and cross-pieces of horizontal structural members of same size, tripod, scaffolding, stairs and rigidity A symmetrical scaffolding step of constructing a plurality of scaffolding towers 11 having braces as a main component to reinforce the symmetrical structure at a predetermined distance inside the absorption tank tanks;

The side girders 12 are assembled between the adjacent scaffold towers in a state where the scaffold towers are installed in a lattice form at a predetermined distance, and the intermediate girders 15 are assembled between the side girders 12, and the side girders are installed. And a step of installing the bottom fixed scaffold for assembling the scaffold for scaffolding work between the middle girder or the middle girder and the middle girder to fill the space inside the cross section of the scaffold tower constructed in the lattice shape with the fixed scaffold;

Inclined pipe, C, which is a common steel pipe between the inner surface of the absorption tower tank and the outer surface of the scaffold tower installed in the lattice type scaffolding step and the side girders 12 assembled therebetween the half moon scaffolding 13 and the scaffold tower, C The lower scaffold of absorber tanks is constructed by installing the half-sized scaffolding step of filling the inclined support portion 14 having the horizontal pipe and the brace pipe with the remote clamp M in the shape of the magnetic hook plate. ,

To build the upper scaffold of the absorption tower tanks through the support grid scaffolding step of sliding the slide scaffold 50 to the support grid 30 at one end of the absorption tower tanks to perform the support grid scaffolding step;

Installation method of block scaffolding system for internal working of absorption tower tank Forming prefabricated block structure by combining vertical column and horizontal part, it is used for construction scaffolding to be used for scaffolding of many equal size vertical members and cross-pieces of horizontal structural members of same size, tripod, scaffolding, stairs and rigidity A symmetrical scaffolding device for constructing a plurality of scaffolding towers 11 having braces as a main component to reinforce the symmetrical shape at a predetermined distance inside the absorption tank tanks;

The side girders 12 are assembled between the adjacent scaffold towers in a state where the scaffold towers are installed in a lattice form at a predetermined distance, and the intermediate girders 15 are assembled between the side girders 12, and the side girders are installed. And a bottom fixed scaffolding installation device for assembling a scaffold for scaffolding work between the middle girder or the middle girder and the middle girder to fill the space inside the cross section of the scaffold tower constructed in the lattice form with the fixed scaffold;

Inclined pipe, C, which is a common steel pipe between the inner surface of the absorption tower tank and the outer surface of the scaffold tower installed in the lattice type scaffolding step and the side girders 12 assembled therebetween the half moon scaffolding 13 and the scaffold tower, C Half moon-type scaffolding installation device which fills the horizontal pipe having a remote clamp (M) in the form of a magnetic hook plate at one end and the inclined support portion 14 having the brace pipe as a component.

The support grid scaffolding device for the support grid scaffolding works by sliding the sliding scaffold 50 to the support grid 30 at one end of the absorption tower tanks.

Block scaffolding system for internal operation of absorption tower tank comprising 3. The method of claim 2,

The sliding footrest 50
Block scaffolding system for internal workings of absorber tanks characterized by scaffolding 51, scaffold 52, scaffolding hook 53 and scaffolding roller R, scaffold spring S, scaffold stator T

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