JP2011085394A - Facility module for plant construction and modular construction method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain accurate setting for the positioning of structural members, such as, piping on building frames even at spots where it is difficult to set dimensions from the construction datum center, in a plant construction method which uses facility modules having structural members, such as, piping and pumps. <P>SOLUTION: Large numbers of piping and others are set with high accuracy by placing a template for positioning piping and other in a lower part of a module, making the template combine the functions of a transportation structure and a working scaffold and using layout setting criteria, piping setting jigs and jigs for setting piping flow directions. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an equipment module having a template in plant construction or the like and a module method using the equipment module.

  For example, in the construction of a nuclear power plant, shortening the construction period, ensuring high quality, ensuring safety, and reducing the number of transportation from the viewpoint of the environment are required, and in order to satisfy these, it is essential to adopt a module construction method. When setting and installing pipes and the like, the dimensions of the reference center provided in the normal building and the reference center of the product are set and the set position is confirmed.

  However, when setting work is performed in a narrow part of a building, setting may not be possible unless the reference center is moved many times under conditions in which direct dimension setting from the reference center is difficult. In addition, when the installation location is high from the floor, it is difficult to set a reference line at a position that is easy to set. It was difficult to set piping and the like. In the case of narrow spaces, it must be set with an unreasonable posture, and it was difficult to install the product locally.

  For example, Patent Document 1 discloses an example in which a template is used for tank piping assembly, but in this case, application to a module structure is not disclosed. Patent Document 2 discloses an example in which a template is used for installing a core shroud in a nuclear pressure vessel. In this case, however, the application to the module structure is not mentioned.

Japanese Patent Laid-Open No. 11-72592 JP-A-7-287090

  The purpose of the present invention is to perform setting work in a narrow part of a building, so even if it is difficult to set the dimension from the reference center, or when the installation location is set high from the floor. Even if it is difficult to provide a reference line at an easy position, it is to provide a new module method capable of setting pipes and the like with high dimensional accuracy and equipment such as a template used therefor.

  Also, it is to provide a new module construction method that can easily carry out local product installation work even in a narrow space and equipment such as a template used therefor.

  The present invention relates to an equipment module having components used for plant construction, which is manufactured in a factory, carried into a construction building and assembled, and a template for positioning the components at the time of assembly is provided on the equipment module. It is provided integrally.

  Further, the template has a positioning means for positioning the constituent members.

  Further, the positioning means has a positioning hole and a ruled line.

  The plant is a nuclear power plant.

  The facility module has a plurality of pipes.

  Further, the template has a positioning hole for positioning one end of the pipe at a predetermined position, and a pipe setting jig that is mounted on the pipe and positioned in the positioning hole.

  Further, the template includes a ruled line for determining the flow direction of the pipe, and a pipe flow direction setting jig that is attached to the pipe and positions the pipe on the ruled line.

  Further, the template is provided at the lower part of the equipment module and constitutes a part of the transport structure.

  The template is provided at the lower part of the equipment module and constitutes a working scaffold.

  Further, the equipment module is divided into a plurality of modules and is integrally coupled by a connecting means at a construction site.

  Further, the connecting means has a reamer hole provided in the plurality of equipment modules and a reamer bolt engaged with the reamer hole.

  Moreover, it has a building positioning means which positions the said several installation module connected integrally with respect to the said construction building.

Furthermore, in the module construction method of carrying in and constructing the equipment module having the components produced in advance in the factory into the plant construction building,
The facility module is provided with a template for positioning the components in a construction building,
When carrying into the construction building, use the template as a transport structure,
After carrying into the construction building, positioning the component by the template and using the template as a working scaffold,
The template is removed from the equipment module after positioning of the constituent members.

  Furthermore, in the module construction method for plant construction, the equipment module is divided into a plurality of parts, and the equipment modules divided in the construction building are combined together.

  Furthermore, in the module construction method for plant construction, the equipment module has a plurality of pipes as constituent members.

  Furthermore, in the module construction method for plant construction, the template positions the plurality of pipe tips and pipe flow directions.

  Furthermore, in the module construction method for plant construction, the equipment module is a module related to a control rod drive system piping group in a nuclear power plant.

  In order to efficiently assemble equipment modules having components such as a large number of pipes in plant construction, the present invention provides a template that is used for both positioning of components and reinforcing and working scaffolds. Compared to this, the work man-hours can be greatly reduced. Furthermore, the ease of work can be improved, and the structure can be assembled and installed with high accuracy.

The top view of a CRD housing. FIG. 4 is an AA arrow view of FIG. 3. The perspective view of a CRD housing and a scram piping joint part. The top view of the 4-part dividing module of this invention. FIG. The top view of a module cradle. The perspective view of the coupling part of a module stand and a housing rest support. The top view of the frame structure which interferes at the time of module carrying-in. BB arrow line view of FIG. 6, FIG. The top view which shows the time of module A carrying-in. The top view which shows the time of module B carrying-in. The top view which shows the time of module C carrying-in. The top view which shows the time of module D carrying-in. CC arrow line view of FIG. The K section enlarged view of FIG. The installation top view of the jig for module setting. The schematic diagram which shows the module setting position adjustment by jackup. The schematic diagram which shows the module setting position adjustment by a reamer bolt. GG sectional drawing of FIG. The HH arrow line view of FIG. The perspective view which shows a CRD housing and a CRD scram piping joint part setting. The schematic diagram which shows a CRD scram piping center position attachment jig. The perspective view which shows CRD scram piping flow direction setting. The schematic diagram which shows a CRD scram piping flow direction setting jig.

  Embodiments of the present invention will be described below with reference to the drawings.

  A description will be given below by taking as an example a housing piping group of a control rod drive system (hereinafter collectively referred to as CRD) in a nuclear reactor containment vessel, which is a nuclear power plant facility. FIG. 1 is a plan view of an assembly of CRD housings 9 from above, 12 is a housing restraint support, and 17 is a housing structure. FIG. 2 is an AA arrow view of FIG. 1, and 10 is a reactor pressure vessel. FIG. 3 is a perspective view of the CRD housing 9 and shows a coupling portion (joining portion) with the CRD scram pipe 8.

  As shown in FIG. 1 to FIG. 3, in the final installation state, this part is a dense region of the CRD housing 9 and a large number of CRD scrum pipes 8, and piping setting work is difficult in places where installation of scaffolding for installation is difficult. Done.

FIG. 4 schematically shows a plan view of the CRD housing portion. The piping group is composed of four modules, module A, module B, module C, and module D. FIG. 5 shows a perspective view of module A. FIG.
[Module Overview]
In FIG. 5, module A includes a pipe setting template 5 that can also be used as a scaffold for local installation, a transport structure 6, a reinforcing structure 7, and a CRD housing 9 that are used when transporting locally from the module manufacturing factory and when carrying in a building. And about 50 CRD scram pipes 8 attached to each other. The entire module has about 200 pipes. Moreover, since the setting place of the module is a blow-off portion made of a space without a support structure, it is necessary to provide a module cradle.
[Divided shape of module]
When an integrated module is used to reduce the number of times of delivery at the site, it cannot be carried in due to interference between the reactor containment enclosure and piping. In addition, sea transportation is selected under the domestic transportation restriction conditions, the production site is limited, and transportation costs are higher than land transportation such as trailers. Therefore, the module needs to be divided.

  It is desirable to reduce the number of module divisions as much as possible in order to reduce the number of times of delivery into the building on site. Since the flow of arrangement of the CRD scram pipe 8 can be roughly divided into four directions, the minimum module can be divided into four. Next, when considering the divided shape, it is easier to carry in the ground because the structure is simpler if it is divided into four straight lines. However, since the flow direction of the CRD scram pipe 8 is different, the dividing method needs to be divided in units according to the flow of the pipe, and it is necessary to form a non-uniform four-divided module as shown in FIG.

In the case of this division, for example, when the module B is carried into the building ahead of the module A, the module A needs to be carried straight into the building due to the unevenness of the template. However, when module A is carried in straight, it cannot be carried in because it interferes with the housing structure 17. Therefore, when designing the module, it is necessary to consider the order of loading and the procedure of each module.
〔template〕
The template 5 attached to each module is made of a steel plate provided with positioning holes and ruled lines attached to the upper surface of the transport structure 6. By making the template 5 into a steel plate structure, the template 5 can be used as a scaffold when setting piping.

  The template 5 is provided with a positioning hole that is slightly larger than the CRD scram pipe 8 in accordance with the coupling position of the CRD scram pipe 8 and the CRD housing 9. At this time, it is better to match the positioning hole diameter to the piping shape as much as possible. However, since adjustment work (insertion / extraction work) of the piping on site occurs, setting the CRD scram piping 8 is easy if it is used as a loose hole. become. In addition, if a cushioning material such as urethane or rubber that matches the shape of the hole is wrapped around the pipe and inserted into the template 5 and temporarily fixed, the module can also be used as a reinforcing structure during transportation from the production factory to the site. The material can be reduced.

In addition, since the CRD scram pipe 8 has pipes arranged in various directions, the CRD pipe 8 can be easily set if the pipe flow direction is marked on the template 5 in advance. Along the pipe center line in the flow direction of the pipe, if two crease lines for setting the flow direction of the pipe are provided in parallel on the left and right sides with dimensions slightly larger than the outer dimensions of the pipe, dimensions can be measured from any position when setting the CRD scram pipe. Setting is possible. For the module position setting, ruled lines with center lines 0 ° to 180 ° and 90 ° to 270 ° shown in FIG.
[Setting position in CRD scrum piping module]
The CRD scram pipe 8 incorporated in the module is set up in the vertical direction in order from the top level, so the CRD scrum pipe 8 is lowered as much as possible in order to secure a setting work space at the site. Keep it. Further, in the horizontal direction, it is arranged as close to a fixed position as possible so that only adjustment in the vertical direction is performed when setting the pipe.
[Module production method]
The module is divided into four parts, and when a ruled line for piping setting is provided individually, a deviation due to assembly tolerance at the time of module production occurs. Therefore, when manufacturing the module, all the modules are temporarily assembled at the module factory once, and the ruled lines are drawn in this state in the same manner as the on-site installation state to increase the accuracy of the ruled lines.

In addition, reamer bolts are used to connect the modules in order to increase the alignment accuracy during field installation. In order to improve the set dimensions of the reamer bolts, drill the reamer holes with the modules temporarily aligned at the factory.
[Module import procedure]
There are various conditions raised above, and the module cannot be established without considering the module loading procedure. Therefore, the module setting procedure will be described in the next section. The module setting procedure is performed in the following order.

Work procedure 1: Module cradle installation (Figs. 6 and 7)
Work procedure 2: Module A loading (FIGS. 8 to 10)
Work procedure 3: Module B loading (Fig. 11)
Work procedure 4: Module C loading (FIG. 12)
Work procedure 5: Module D loading (FIGS. 13 to 15)
Work procedure 6: module position adjustment and integration (FIGS. 16 to 20)
Work procedure 7: Implementation of piping installation using template 5 (FIGS. 21 to 24)
Work procedure 8: Removal of the module template 5 Work procedure 9: Connection between the CRD housing 9 and the CRD scram pipe 8 (FIG. 5)
Next, details of the work procedure will be described.
(Working Procedure 1): Installation of Module Support Table In FIGS. 6 and 7, reference numeral 11 denotes a CRD housing restraint structure that holds the CRD housing 9. Since the CRD housing 9 is set later, the module setting level in the housing has a blow-off structure. Therefore, the module cradle 13 is set for module setting.

  The module cradle 13 has a temporary structure and needs to be easily removable because it needs to be removed later. First, a module support base beam 15 made of H-shaped steel is bridged over a CRD housing restraint support 12 for fixing the CRD housing 9 in the vicinity of the module setting level.

Since the module setting level needs to be set at a position lower than that of the CRD housing restraint support 12, a module support base column 14 for level adjustment is provided, and a module support base 13 for supporting the module is disposed at the lower end. The connection (joining) structure of each member is fastened with bolts 16 in consideration of removal on site.
(Working procedure 2): Module A loading FIG. 8 is a plan view showing the housing structure 17, and FIG. 9 is a BB arrow view showing the CRD housing restraint structure 11, the module receiving table 13, the module receiving table beam 15, and the housing structure 17. It is. FIG. 10 is a plan view when the module A is carried in.

At the time of loading the first module A, the only member that interferes with loading is the housing structure 17, so that the module A is loaded from the center while avoiding the housing structure 17 as shown in FIG. After avoiding 17, it is moved to a predetermined position and temporarily placed near a fixed position.
(Working procedure 3): Module B carry-in In FIG. 11, the second module B is in a state where the first module A has already been installed, and is carried in from the notch shape of the template 5 that forms the floor plate of the module. Then, the module A is carried to the left side from the module A, carried to a position avoiding the housing structure 17 at a height that does not interfere with the module A, moved to the right side of the figure, and temporarily placed near a fixed position.
(Working procedure 4): Module C loading In FIG. 12, the third module C cannot be loaded from the position avoiding the housing structure 17 and the already loaded modules A and B as they are. Therefore, the module C is rotated, the module structure C is carried in while rotating so that the housing structure 17 and the CRD scram pipe 8 do not interfere with each other, the housing structure 17 is avoided at a height that does not interfere, and then moved to a predetermined position. Temporary storage nearby.
(Working Procedure 5): Module D Loading In FIG. 13, the fourth module D cannot be loaded in a state where the modules A, B, C and the housing structure 17 that have already been loaded are avoided. Therefore, the temporary placement position of the CRD scram piping is arranged so as to avoid the housing structure 17 only for the module D, and the module D is carried in straightly near the fixed position. FIG. 14 is a CC arrow view of FIG. The template 5 is located inside the CRD housing restraint structure 11 of FIG.

Further, since the transport structure interference part 18 interferes with the housing structure 17 in FIG. 15, the transport structure interference part 18 is removed before the building is carried in. This interference part is a member for restraining in the horizontal direction when the module is transported, and can be removed because it is unnecessary when the building is carried in.
(Work procedure 6): Module position adjustment and integration Modules A, B, C, and D are already arranged in the vicinity of the installation position up to work procedure 5. However, the positioning function of the template 5 cannot be used as it is because of accuracy. Therefore, in order to integrate the modules divided into four in FIG. 16, preparations are made so that the modules 19 can be finely adjusted by inserting a jack 19 at a position E between the CRD housing restraint structure 11 and the transport structure 6. To do.

  Thereafter, as shown in FIGS. 17 to 20, with each module integrated in the manufacturing factory, the reamer bolt 20 is inserted into the reamer hole 21 provided in advance in the coupling portion 22 at the position F in FIG. 16 of the transport structure 6. Include. If the bolt position does not match, the jack 19 is adjusted to a position where the reamer bolt 20 can be inserted. After the positions of all the four divided modules are set, the module fixing bolts 23 are tightened, the transport structure 6 is coupled, and the modules are integrated and fixed.

After the integration of the four-division module is completed, in order to adjust the installation position of the integrated module with respect to the building, the reference line marked on the local building and the reference line marked on the template 5 are used as building positioning means. Use the jack 19 to fine-tune again and adjust.
(Working procedure 7): Piping installation using template of module As shown in FIG. 13, there are 200 or more combined CRD scram pipings 8 arranged in a flow in 8 directions, each of which has 6 stages or up and down. Seven layers are stacked. As described in the operation procedure 4, the CRD scram pipe 8 set in the module is temporarily placed as far as possible from the final setting position of the pipe at the time of carry-in. Therefore, by setting the piping in order from the top, setting work can be performed while always ensuring a large work space.

  However, when setting the CRD scram pipe 8, a large number of pipes arranged below the pipe to be set are temporarily placed below, so it is difficult to set the position from the downward swing 29 and the reference line. It is. Therefore, the following setting method / tool was invented to solve these problems.

The setting positions of the pipes are roughly divided into two parts, that is, the setting of the coupling portion between the CRD housing 9 and the CRD scrum pipe 8 and the setting of the flow direction of the CRD scram pipe 8 shown in FIG.
(1) Setting of piping joint portion As shown in FIG. 21 and FIG. 22, regarding the setting of the joint portion between the CRD housing 9 and the CRD scram piping 8, the CRD scram piping 8 is placed on the template 5 for positioning the CRD scram piping 8. The piping connection position is set using the positioning hole 25 provided larger than 8 outer diameters. However, since the piping needs to be temporarily placed below the set position as described above, the positioning hole 25 provided in the template 5 is a loose hole, and the position setting of the CRD scram piping 8 can be performed as it is. Can not. Therefore, in order to easily set the mounting position of the CRD scram pipe 8, a pipe setting jig 24 shown in FIG. 22 is attached to the CRD scram pipe 8, and is inserted into a positioning hole 25 provided in the template.

The pipe setting jig 24 has a half structure that can be attached and detached so that it can be shared with other pipes. Further, in order to attach the template 5 at the set position with high accuracy, the pipe setting jig 24 has a structure in which the size and the gap of the positioning and positioning hole 25 provided in the template 5 are hardly provided. A taper 27 is provided at the tip of the pipe setting jig 24. If the pipe setting jig 24 is attached to the CRD scram pipe 8 and is inserted into the positioning hole 25 provided in the template 5 using the taper 27, the CRD scram pipe 8 can be easily set to the set position with high accuracy.
(2) Setting of Pipe Flow Direction As shown in FIGS. 23 and 24, the flow direction of the CRD scram pipe 8 is set slightly from the outer shape of the CRD scram pipe 8 provided on both sides of the CRD scram pipe center line provided in the template 5. A downward swing 29 is set to the large ruled line 28 and set. When performing this operation, the set position can be easily measured at any position by using the pipe flow direction setting jig 30 of FIG.

  The pipe flow direction setting jig 30 has the same dimensions as the outer diameter of the pipe flow direction setting jig 30 and the ruled line 28 provided on the template 5 so that the pipe flow direction setting jig 30 can be set from any position. In the state where the swing swing 29 is suspended along the outer diameter of the pipe flow direction setting jig 30 attached to the CRD scram pipe 8, the flow direction of the CRD scram pipe 8 is determined if the ruled line 28 and the swing swing 29 overlap. Therefore, the setting can be easily performed. In addition, the pipe flow direction setting jig 30 is divided into two parts by a hinge 32, and a structure having a fixing bolt 31 for fixing the jig at a position to be set enables easy pipe setting.

  In the case of a module, the structure of the jig / ruled line is as follows. Since the pipe diameter of the connection between the CRD scram pipe 8 and the CRD housing 9 is 25 mm (the pipe outer diameter is 34 mm), the template 5 is provided with two ruled lines 28 at positions 25 mm to the left and right of the pipe center. .

In these cases, the pipe flow direction setting jig 30 can be mounted and set anywhere in the pipe flow direction, and a single jig can be used for setting a large number of pipes.
(Working procedure 8): Removal of the module template After determining the piping setting position in the previous process, the template 5 and the module cradle 13 are removed before finally fixing and attaching to the CRD housing 9 by welding or the like. Keep it.
(Working procedure 9): Connection of CRD housing and CRD scram piping As shown in FIG. 2, the CRD housing 9 is structured to engage with the reactor pressure vessel 10, and after setting the piping module at a predetermined position, first the reactor pressure The position of the container 10 is set, and then a number of CRD housings 9 are inserted after the access tunnel hatch. After that, the CRD housing 9 is inserted into the reactor pressure vessel 10 and welded, and the CRD scram pipe 8 is finally fixedly connected to the CRD housing 9 by welding to assemble the pipe group around the CRD housing. Complete.

  The present invention has the above-mentioned effects by using a template in addition to the effects by the module method such as the shortening of the construction period, the high quality by factory production, and the realization of a safe working environment without working at high places. When a template is provided, the amount of modules / manufacturing man-hours increases. However, it is necessary to provide a reinforcing structure for transportation and transportation into the building. By providing the template with a role for the structure, it is possible to Increase in the amount of additional material / work can be suppressed.

  Also, if the template is spread on the module floor with steel plates and used as a scaffold, the scaffold assembly work at the site can be reduced.

  In general modules, high installation accuracy is not required because the spool is divided into three-way adjustable spools from the set position to other unmovable joints. Good. However, when the module has a template function, strict accuracy is required because piping is set based on the template. In order to satisfy this, a module transport structure and a module connecting part housing are used to make a structure that can be finely adjusted by a jack or the like, and a module structure that uses a reamer bolt to set the module accurately.

  When setting a pipe or the like arranged in a narrow part using a template, a structure that can be set efficiently in a narrow work space is required for the pipe and the like setting jig. A pipe setting jig that can be accurately set to the center position by simply attaching the setting jig to the pipe and inserting it into the template, and it can be installed at any position of the pipe when setting the flow direction of the pipe, and it can be easily set from any position. A pipe flow direction setting jig capable of setting a position is provided.

  The scope of application of the present invention is, for example, around pumps that require high installation accuracy in nuclear power plants, around RHR (residual heat removal system) pumps, around HPCF (high pressure core water injection system) pumps, etc. For example, a place where equipment requiring high installation accuracy such as a level meter is arranged is preferable.

  Also, in nuclear power plants, around the TIP (mobile in-core instrumentation) pipe, in which there are more than 100 pipes in the gap between the access passage and the access passage connecting the reactor containment vessel and the reactor building For example, a place where a group of pipes and the like are dense and it is difficult to set a product and a short construction period is required is preferable.

A, B, C, D: Module, 5: Template, 6: Transport structure, 7: Reinforced structure, 8: CRD scram piping, 9: CRD housing, 10: Reactor pressure vessel, 11: CRD housing restraint structure, 12: Housing restraint support, 13: Module support base, 14: Module support base post, 15: Module support base beam, 16: Bolt, 17: Housing structure, 18: Transport structure interference part, 19: Jack, 20: Reamer bolt , 21: reamer hole, 22: coupling portion, 23: module fixing bolt, 24: piping setting jig, 25: positioning hole, 28: ruled line, 30: pipe flow direction setting jig, 31: pipe flow direction setting Jig fixing bolts,

Claims (17)

  An equipment module having components used for plant construction, which is manufactured in a factory, carried into a construction building and assembled, and integrated with a template for positioning the equipment module components at the time of assembly. An equipment module for plant construction characterized by being provided in   2. The equipment module according to claim 1, wherein the template has positioning means for positioning the constituent members.   3. The equipment module according to claim 2, wherein the positioning means has a positioning hole and a ruled line.   4. The equipment module according to claim 1, wherein the plant is a nuclear power plant.   The equipment module according to any one of claims 1 to 3, wherein the equipment module has a plurality of pipes.   The equipment module according to claim 5, wherein the template includes a positioning hole for positioning one end of the pipe at a predetermined position, and a pipe setting jig for mounting the pipe to the positioning hole. An equipment module for plant construction.   6. The equipment module according to claim 5, wherein the template is a ruled line for determining a flow direction of the pipe, and a pipe flow direction setting jig that is attached to the pipe and positions the pipe according to the ruled line. An equipment module for plant construction, characterized by comprising:   The equipment module for plant construction according to claim 1, wherein the template is provided at a lower part of the equipment module and constitutes a part of a transport structure.   2. The equipment module for plant construction according to claim 1, wherein the template is provided at a lower part of the equipment module to constitute a work scaffold.   2. The facility module for plant construction according to claim 1, wherein the facility module is divided into a plurality of modules and is integrally coupled by a connecting means at a construction site.   11. The facility module for plant construction according to claim 10, wherein the connecting means includes a reamer hole provided in the plurality of facility modules and a reamer bolt engaged with the reamer hole.   11. The equipment module for plant construction according to claim 10, further comprising building positioning means for positioning the plurality of equipment modules coupled together with respect to the construction building. In the module construction method of building equipment modules with components produced in the factory in advance and constructing them in the plant construction building,
The facility module is provided with a template for positioning the components in a construction building,
When carrying into the construction building, use the template as a transport structure,
After carrying into the construction building, positioning the component by the template and using the template as a working scaffold,
A module construction method for plant construction, wherein the template is removed from the equipment module after positioning of the constituent members.   14. The module construction method for plant construction according to claim 13, wherein the equipment module is divided into a plurality of parts, and the equipment modules divided at the construction building are integrally coupled.   The module construction method for plant construction according to claim 13 or 14, wherein the equipment module has a plurality of pipes as constituent members.   The module construction method for plant construction according to claim 15, wherein the template positions the plurality of pipe tips and pipe flow directions.   The module construction method for plant construction according to any one of claims 13 to 16, wherein the equipment module is a module relating to a control rod drive system piping group in a nuclear power plant.

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