JP2000072379A - Piping module method and article pulling method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a piping module construction method and an article pulling method capable of reducing the labor involved in transporting materials and the amount of use of a temporary reinforcing material and improving work efficiency. SOLUTION: After assembling a plurality of components constituting a piping module 22 with a module working platform 20 to form a piping module 22, the module working platform 20 is provided.
Is moved along the traveling rail 18 within the radius of rotation of the jib crane 12, and the piping module 22 is pulled up and transported. The top plate 68 is placed on the upper surface of the module manufacturing gantry 20, and the components are individually suspended using suspending means movably mounted on the suspending rail, and the components are suspended together with the suspending means. If the piping module is moved along the pipe and the piping module is assembled while maintaining the suspended state of the components, the labor involved in transporting the material and the amount of the temporary reinforcing material can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping module construction method for constructing a power plant or the like using a piping module in which parts such as piping and valves are assembled in advance for each function.

[0002]

2. Description of the Related Art In a power plant such as a nuclear power plant or a thermal power plant, many pipes are installed for circulation of cooling water and the like. The installation method of the piping route in the above power plant and the like, the components constituting the piping route, that is, pipes and open / close valves, and a frame that supports these members from the ground surface and the like are assembled in advance in a place other than the construction site and a module It is carried into a construction site and the modules are connected.

FIG. 9 is an explanatory view showing an outline of a conventional module construction method. As shown in FIG. 1, a piping module 1 used for construction of a piping route is manufactured at a processing site 3 remote from a construction site 2, and the form is the piping module 1.
A temporary reinforcing member 4 for transportation and pulling up, which is framed, is provided around the periphery of the pipe, and the piping module 1 is housed inside the temporary reinforcing member 4. Further, a fall prevention rod 6 extending in the radial direction is welded to the outer periphery of the pipe 5 constituting the pipe module 1,
Even if an external force is applied to the pipe 5, the pipe 5 is prevented from falling down.

[0004] As a procedure for assembling the piping module 1, the piping 5 of the parts to be assembled is suspended by an overhead crane 7 arranged on the ceiling of the processing site 3. Is the setting order. At this time, the overhead crane is used exclusively during the period from the start of the suspension of the pipe 5 to the completion of the setting of the temporary reinforcing member 4 and the overturn prevention bar 6, and cannot be used for other work.

When the assembling of the piping module 1 is completed, the temporary reinforcing member 4 is pulled up by an overhead crane 7 installed on the ceiling of the processing site 3 and the piping module 1 is mounted together with the temporary reinforcing member 4 on a truck 8 for transportation. I do. The truck 8 is connected to a jib crane 9 at the construction site 2.
The jib crane 9 lifts the piping module 1 together with the temporary reinforcing members 4 from the bed of the truck 8 using the jib crane 9, and operates the temporary reinforcing members 4 by operating the jib crane 9.
And the piping module 1 to a target location.
After installing the piping module 1 in a predetermined place, the temporary reinforcing member 4 is disassembled and removed from the construction site.

[0006]

However, the above-mentioned piping module method has the following problems. That is, the first problem is that the lifting work of the piping module (including the temporary reinforcing material) is performed at two places, that is, the processing site and the truck bed. Since the piping module has to be transported between them, the efficiency of the work itself is not improved.

A second problem is that a temporary reinforcing material must be provided for each piping module, and it takes time to secure materials, form the temporary reinforcing material, or disassemble the temporary reinforcing material after installing the piping module. The labor and time were enormous.

A third problem is that when transporting by a crane, it is necessary to position the center of gravity of the piping module below a pulling cable hanging down from the crane in order to stabilize the posture of the piping module. There are many types of piping modules, and the position of the center of gravity is individually different. For this reason, it is difficult to find the position of the center of gravity of the piping module and match it with the lifting position of the crane, which also makes the lifting of the piping module extremely troublesome.

The present invention pays attention to the above-mentioned conventional problems, and reduces the time and labor required for manufacturing and transporting the piping module and the amount of temporary reinforcing material used, thereby improving the working efficiency. An object is to provide a module construction method and an article pulling method.

[0010]

According to the piping module method of the present invention, a ceiling plate composed of a suspension rail is mounted on the upper surface of a module manufacturing base, and a suspension means movably mounted on the suspension rail is provided. A plurality of components constituting the piping module are individually suspended using the components, and the components are moved along the suspension rail together with the suspending means, and the piping module is suspended while the components are suspended. After assembling, the module manufacturing platform was moved along the traveling rail within the turning radius of the crane, the piping module was pulled up by the crane, and the module was transferred to the module installation location. Then, the piping module is supported via a load sensor installed on the module manufacturing base, and the position of the center of gravity of the piping module is calculated based on the load distribution by the load sensor. It is preferable that the pulling cable is hooked on the piping module so that the center of gravity is located below the extension of the cable.

In the article lifting method according to the present invention, the article to be lifted is supported via a load sensor, and the position of the center of gravity of the article is calculated based on the load distribution by the load sensor. The procedure was such that the pulling cable was hooked on the article so that the center of gravity was located below the extension of the hanging pulling cable.

[0012]

According to the present invention in which the matters are specified as described above,
The piping module is assembled inside the module production platform, and after the piping module is assembled, the module production platform is moved within the turning radius of the crane, so the lifting operation of the piping module can be done only once by the crane. . And since the module manufacturing base is made movable, it is possible to omit the operation of moving the piping module within the turning radius of the crane using a truck or the like. Here, a top plate composed of suspension rails is installed on the upper surface of the module manufacturing base and the components are individually suspended via suspension means, so that the components are held in the air by the suspension members. Then, while maintaining the suspended state, the components are assembled into a piping module, and by pulling up the piping module via the top plate, it is possible to attach a member for preventing a fall to the piping module or to attach the member to the outside of the component. There is no need to provide a temporary reinforcing material for holding, and materials for the temporary reinforcing material are not required. Further, since the temporary reinforcing member is not provided, the labor for manufacturing the temporary reinforcing member and the time for removing the temporary reinforcing member after the installation of the piping module are eliminated, so that the working efficiency can be improved. Also, when assembling the piping module, since the components are held by the suspending means, the components can be easily moved along the suspension rail and moved up and down, thereby improving the efficiency of assembling the piping module. it can.

[0013] Then, the piping module assembled on the module manufacturing stand is held via a load sensor, and the center of gravity of the piping module is determined based on the load distribution from the load sensor. The work of matching the center of gravity below the extension line is facilitated, and the efficiency of the lifting work can be improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of a piping module construction method, a piping module manufacturing method, and an article pulling method according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a work explanatory diagram when the piping module method according to the present embodiment is applied to the construction of a power plant. As shown in FIG. 1A, a construction site 10 is constructed by using a piping module method and a construction building 11 (reactor building 11).
A, a turbine building 11B, and a service building 11C) are lined up, and a jib crane 12 for transporting construction materials is installed at the center thereof. The jib crane 12 has a pull-up arm 14 that rotates around its installation location. The movable range of the pull-up arm 14, that is, the possible range of material transportation by the jib crane 12 is centered on the installation location of the jib crane 12. This is indicated by a circular movable range 16. The inner circle in the movable range 16 indicates the movable range on the crane main winding side, and the outer circle indicates the movable range on the crane auxiliary winding side. The lifting capacity of the jib crane 12 described in the present embodiment is about 130 t.

At one position on the outer edge of the movable range 16,
A traveling rail 18 that straddles the boundary of the movable range 16
Is provided. As shown in FIG. 2B, a module-made operation platform 20 framed as shown in FIG. The module manufacturing gantry 20 enables the piping module 22 used for the construction of the piping route at the construction site 10 to be assembled therein, and the assembled piping module 22 is moved along the travel rail 18 into the movable range 16.
It is possible to move inside. The module manufacturing base 20 includes a base 24 serving as a base installed on the traveling rail 18 and a frame 26 provided above the base 24.

FIG. 2 is a front view, a rear view, and a state diagram showing a form in which an iron plate is laid on the surface plate 24 in the module manufacturing base 20. FIG.
6 is a front view and a side view showing the configuration of FIG. 6, and FIG. 4 is an enlarged view of a main part of the surface plate 24 and the frame 26.

As shown in these figures, a surface plate 24 serving as a base constituting the module manufacturing gantry 20 has a form in which an I-shaped steel material 28 having an I-shaped cross section is assembled in a lattice shape. And in the I-shaped steel material 28 constituting the outer frame,
A stiffener 30 is provided so as to follow the pitch of the I-shaped steel material 28 disposed inside the stiffener 30, and the stiffener 30 and the tip side surface of the I-shaped steel material 28 are connected by a gusset plate 31 as shown in FIG. Thus, the platen 24 is formed. Wheels 29 (see FIG. 6) are attached to the four corners on the rear side of the surface plate 24, and the module manufacturing base 20 is moved along the traveling rail 18.

An iron plate 32 is spread on the front side of the surface plate 24 for the purpose of holding construction members and improving workability. This state is shown in FIG. At the front side of the iron plate 32, a mounting hole 34 as shown in FIG.
4 are formed so as to correspond to the positions of the screw holes provided on the surface of the base plate 4, and the fixing plate 24 is joined to the iron plate 32 by passing a tightening bolt through the mounting hole 34. At four corners of the iron plate 32, there are provided square pillar mounting holes 38 through which pillars 36 constituting the frame 26 are inserted and for fixing the pillars.

Frame 2 installed above platen 24
6, the surface plate 24 is pulled out from a square top plate receiving frame 40 having the same area, and four corners of the top plate receiving frame 40;
A square pillar 36 is provided which can be inserted into a pillar mounting hole 38 provided on the side of the surface plate 24.

The top plate receiving frame 40 is made of an I-shaped steel material 42 like the surface plate 24, and the connection of the corners is made by a stiffener provided on the I-shaped steel material 42 as shown in FIG. The connection is performed by using a gusset plate 46 to connect the 44 and the tip of the I-shaped steel material 42 to be connected. Further, first reinforcement rods 48 are attached to the four corners of the top plate receiving frame 40 to reinforce the top plate receiving frame 40 so as to connect the adjacent I-shaped steel materials 42. That is, as shown in FIG. 4 (4), the first holding plate 50 is attached to the inner side surface of the I-shaped steel material 42 at both ends thereof. The two are connected by one reinforcing rod 48 to reinforce the top plate receiving frame 40. At four corners of the upper surface 52 of the top plate receiving frame 40, a load sensor 54 for holding the top plate and detecting a load from the top plate is attached (see FIG. 8). Then, a signal line 56 is drawn out from the load sensor 54, and the analog /
A computer (hereinafter, referred to as a PC) 60 that performs arithmetic processing via a digital converter (hereinafter, referred to as an A / D converter) 58
Connected to.

At four corners of the lower surface 62 of the top plate receiving frame 40, pipe-shaped pillars 36 having a rectangular cross section as shown in FIG. Then, in order to secure the mounting strength of the pillar 36 to the top plate receiving frame 40, the top plate receiving frame 4
The second reinforcing rod 64 is attached between the zero and the pillar 36. That is, the second reinforcing rod 62 is provided on the side surface of the pillar 36 and the lower surface 62 of the top plate receiving frame 40 as shown in FIG.
Both ends are held by a second holding plate 64 as shown in (6), so that a projecting action against external force is exerted.

As described above, the piping module 22 is suspended above the module manufacturing base 20 (the load sensor 54 installed on the top plate receiving frame 40) composed of the base 24 and the frame 26. Is installed.

FIG. 5 is an explanatory view showing the structure of the top plate 68. As shown in the figure, the top plate 68 has the same area as the top plate receiving frame 40, and the outer frame and the short side forming the inner lattice are formed by the I-shaped steel 70 similarly to the top plate receiving frame 40. Be composed. And I-type steel materials 7 arranged uniformly
The suspension rails 72 having an I-shaped cross section are arranged on one side of 0 so as to form a lattice, and are joined at an intersection of the I-shaped steel material 70 and the suspension rail 72 to form a top plate 68. Like that. Also, on the opposite surface of the I-shaped steel member 70 on the mounting side of the suspension rail 72, the same figures (4) and (5)
A plurality of hanging pieces 74 as shown in are provided at equal intervals,
The lifting cable hung from the jib crane 12 is hooked in a hook hole 76 provided in the hanging piece 74, and the top plate 6
8 can be pulled up by a jib crane 12.
A traveling type chain block can be mounted on the suspension rail 72 constituting the top plate 68, and the chain block can be moved along the extension direction of the suspension rail 72.

Using the module working base 20 and the top plate 68 thus configured, the piping module 22
In addition, a procedure for manufacturing a piping route at the construction site 10 using the piping module 22 will be described. First, it is necessary to lay the traveling rail 18 so as to straddle the boundary of the operation area 16 of the jib crane 12, but it is desirable that the traveling rail 18 be a flat ground because of the ease of transporting and storing the material, and the area that does not hinder the crane operation. You have to choose. After laying the traveling rail 18 in a place that satisfies the above conditions, the surface plate 2 is placed on the traveling rail 18.
4, the iron plate 32 is spread on the surface plate 24, and then the frame 26 is erected on the surface plate 24.
After assembling the module manufacturing base 20 in this manner, the jig crane 12 is used to move the top 68 to the top receiving frame 40.
A plurality of traveling chain blocks 78 serving as suspension means are attached to the suspension rails 72 constituting the top plate 68. Then, the components 80 of the piping module 22 transported by a truck or the like are loaded into the module manufacturing gantry 20, and these components 80 are individually suspended by the chain block 78.
The component 80 is held in the air. FIG. 6 (1)
Component 8 suspended by chain block 78
FIG. 10 is an explanatory diagram showing a work procedure for assembling the first assembly. As shown in FIG.
Is held in the air by the chain block 78. Then, as shown in FIG. 2B, the chain block 78 is adjusted so that the heights of these components 80 are equal to each other, and any one of the components 80
Is moved along with the chain block 78 along the suspension rail 72, and the components 80 are brought into contact with each other and joined by welding or the like. If the component parts 80 are connected to the other side one after another in this way, the piping module 22 can be assembled while being suspended from the chain block 78. When the component 80 is suspended from the chain block 78, the piping module 22 can be assembled simply by moving the suspended component 80 along the suspension rail 72 for the purpose of improving the efficiency of assembling the piping module 22. The suspension position of the component 80 is set in advance.

After moving the component 80 along the suspension rail 72 and assembling the piping module 22 while suspending the piping module 22 from the top plate 68, the load sensors 54 are operated and the four corners of the top plate 68 The distribution of the applied load is measured, and the position of the center of gravity on the top 68 is calculated based on this value. The load output detected by the load sensor 54 is transmitted through a signal line 56, converted from an analog signal to a digital signal by an A / D converter 58, and then taken into the PC 60. Then, the individual load sensors 5 are
4 and the center of gravity position is calculated from the output value.

FIG. 7 is an explanatory diagram showing a calculation procedure for obtaining the center of gravity of the top plate 68 based on the value from the load sensor 54.
As shown in FIG.
Since 4 is installed, the relative positions of the four load sensors 54 are known in advance. Therefore, any one of the four load sensors 54 is set as a reference point (in the present embodiment, the load sensor 54A is a reference point), and the adjacent load sensors 54
If a coordinate system is set such that B and 54D are located on the coordinate axes, the coordinates of each load sensor 54 are determined (as shown in the figure). Then, the position of the center of gravity within the range of the top 68 is set as P, and its coordinates are set as variables of (x, y).

If the coordinates of the load sensor 54 and the coordinates of the center of gravity are set in this way, the sum of the rotational moments generated around each center of gravity with each load sensor as a power point becomes zero, so that the following equation is established. If the loads from the top plate 68 applied to the load sensors 54A to 54D are A to D, respectively,

(Equation 1)

Since the sum of the rotational moments generated in the adjacent load sensors 54 is balanced with the sum of the other two rotational moments, the following equation is established.

(Equation 2) Or

(Equation 3) It may be. Then, if the simultaneous equations are solved by the arithmetic processing by the PC 60, the position of the center of gravity P can be determined.

FIG. 8 is a state diagram showing a procedure for pulling up the piping module 22 together with the top plate 68 from the module manufacturing base 20. After assembling the piping module 20 inside the module manufacturing base 20 as shown in FIG. 1A, the center of gravity on the top plate 68 is obtained using the load sensor 54. After calculating the position of the center of gravity on the top plate 68, the beam condition of the suspension wire 84 is adjusted so that the center of gravity is located below the extension of the pull-up cable hanging down from the jib crane 12. In addition, regarding the installation of the suspension wire 84, the suspension piece 7 such that the position of the center of gravity is substantially in the center is set.
4 may be selected and the hanging wire 84 may be hung on the hanging piece 74.

After the hanging position is set so that the center of gravity is located below the extension line of the pulling cable hanging down from the jib crane 12, the jib crane 12 is moved and the top plate is moved as shown in FIG. The piping module 22 may be pulled up from the module production gantry 20 together with 68. Then, the piping module 22 is transported to the site by the jib crane 12, and the piping module 22 is installed on a scaffold for the piping module previously installed at the site. Thereafter, if the piping module 22 is installed on the scaffold and the piping module 22 is removed from the chain block 78, the piping module 22 can be installed at the construction site without the need for disassembling work such as a temporary reinforcing material.

[0031]

As described above, according to the piping module method of the present invention, a ceiling plate composed of a suspension rail is placed on the upper surface of the module manufacturing base, and the suspension plate movably mounted on the suspension rail. A plurality of components constituting the piping module are individually suspended using the lower means, and the components are moved along the suspension rail together with the suspension means, and the suspended state of the components is maintained. After assembling the plumbing module, moving the module working stand along the traveling rail within the turning radius of the crane,
By pulling up the piping module with the crane and transferring it to the module installation location,
The labor involved in transporting the piping module is reduced, and the working efficiency can be improved.

According to the article pulling method of the present invention, the article to be pulled is supported via the load sensor, the position of the center of gravity of the article is calculated based on the load distribution by the load sensor, and the article is suspended. The lifting cable is hung on the article so that the center of gravity is located below the extension of the pulling cable suspended by the means, so that the lifting operation of the article is facilitated and the efficiency of the lifting operation is improved. be able to.

[Brief description of the drawings]

FIG. 1 is a work explanatory diagram in a case where a piping module method according to the present embodiment is applied to the construction of a power plant.

FIG. 2 shows a front view, a rear view, and a state diagram showing a form in which an iron plate is spread over the base plate 24 in the module manufacturing gantry 20.

FIG. 3 shows a front view and a side view showing the configuration of the frame 26.

FIG. 4 is an enlarged view of a main part of the surface plate 24 and the frame 26.

FIG. 5 is an explanatory diagram showing a structure of a top plate 68;

FIG. 6 is an explanatory diagram showing an operation procedure for assembling the component part 80 suspended by the chain block 78.

FIG. 7 is an explanatory diagram showing a calculation procedure for obtaining a center of gravity of a top plate 68 based on a value from a load sensor 54.

FIG. 8 is a state diagram showing a procedure for pulling up the piping module 22 together with the top plate 68 from the module manufacturing gantry 20.

FIG. 9 is an explanatory view showing an outline of a conventional module construction method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Piping module 2 Construction site 3 Processing site 4 Temporary reinforcing material 5 Pipe 6 Overturn prevention bar 7 Overhead crane 8 Truck 9 Jib crane 10 Construction site 11 Construction building 11A Reactor building 11B Turbine building 11C Service building 12 Jib crane 14 Lifting arm 16 Movable area 18 Running rail 20 Module work base 22 Piping module 24 Surface plate 26 Frame frame 28 I-shaped steel material 29 Wheels 30 Stiffener 31 Gazette plate 32 Iron plate 34 Mounting hole 36 Leg column 38 Pedestal mounting hole 40 Top plate receiving frame 42 I Type steel material 44 Stiffener 46 Gazette plate 48 First reinforcing rod 50 First holding plate 52 Upper surface 54 Load sensor 56 Signal line 58 Analog / digital converter 60 Computer 62 Lower surface 64 Second reinforcing rod 66 Second holding plate Over preparative 68 suspended ceiling plate 70 I-type steel 72 suspension rails 74 pieces 76 engaging hole 78 chain block 80 components 82 pulling cable 84 hanging wire

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsuta Shioda 1-1-14 Uchikanda, Chiyoda-ku, Tokyo Inside Hitachi Plant Construction Co., Ltd. (72) Inventor Hiroshi Tanabe 1-1-1, Uchikanda, Chiyoda-ku, Tokyo No. 14 F-term in Hitachi Plant Construction Co., Ltd. (reference) 3F203 AA10 BA01 CA04 CC04 DA08 EC30 FA01

Claims (3)

[Claims] 1. A top plate made of a suspension rail is placed on an upper surface of a module manufacturing stand, and a plurality of components constituting a piping module are individually separated by using a suspension means movably attached to the suspension rail. After moving the component along the suspension rail together with the suspension means and assembling the piping module while maintaining the suspended state of the component, the module manufacturing platform is moved to the traveling rail. The piping module is moved within the rotation radius of the crane along with the crane, the piping module is pulled up by the crane, and is transferred to a module installation location. 2. The piping module is supported via a load sensor installed on the module manufacturing base, and the position of the center of gravity of the piping module is calculated based on a load distribution by the load sensor. The piping module construction method according to claim 1, wherein the pulling cable is hooked on the piping module such that the center of gravity is located below an extension of the hanging pulling cable. 3. An extension line of a pull-up cable which supports an article to be lifted via a load sensor, calculates a position of a center of gravity of the article based on a load distribution by the load sensor, and hangs down from the suspension means. An article pulling method, wherein the pulling cable is hooked on the article so that the center of gravity is located below.