JP2016136113A - Installation method of auxiliary trolley to polar crane inside nuclear reactor containment vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation method of an auxiliary trolley capable of easily installing the auxiliary trolley to a polar crane inside a nuclear reactor containment vessel.SOLUTION: Four sets of a telescopic type heavy load lifting device 4 are assembled to oppose each other on a work floor 3 inside a nuclear reactor containment vessel 1. A jack receiving beam 5 is stretched between tops of the heavy load lifting device 4. The jack receiving beams 5 is installed with a lifting stage 7 via a wire jacking device. An auxiliary trolley 15 is installed on a turning base 14 by a polar crane 2. The lifting stage 7 is lifted together with the wire jacking device by the heavy load lifting device 4, and an auxiliary trolley 15 is lifted above the polar crane 2 together with a turning base 14 by a lifter 8. After the auxiliary trolley 15 is horizontally rotated by the turning base 14, the auxiliary trolley 15 is lowered on the polar crane 2 by the lifter 8, and the auxiliary trolley 15 is installed on the polar crane 2.SELECTED DRAWING: Figure 13

Description

  The present invention relates to a method for installing an auxiliary trolley on a polar crane in a containment vessel, and in particular, an auxiliary trolley on a polar crane in a reactor containment vessel that can be easily installed on a polar crane in a containment vessel. It is related to the installation method.

  An example of a method of installing a steam generator as a heavy object in a nuclear reactor containment vessel is disclosed in Patent Document 1. The existing installation method of this steam generator is demonstrated referring drawings.

  FIG. 17 is a cross-sectional view showing an existing method for installing a steam generator.

  As shown in FIG. 17, this existing installation method is not limited to the existing trolley 25 in which the wire winder 24 is mounted on the crane girder 23 of the polar crane 22 installed in the reactor containment vessel 21. In this method, an auxiliary trolley 28 on which a jacking device 26 and a strand winder 27 are mounted is newly installed, and the steam generator 29 is installed using the existing trolley 25 and the auxiliary trolley 28 (see Patent Document 1). ).

  In order to install the steam generator 29 by the existing installation method, first, as shown by a one-dot chain line in the figure, the suspension beam 30 attached to the wire jacking device 26 of the auxiliary trolley 28 is placed in the reactor containment vessel 21. Are connected to the trunnion 31 at the upper part of the steam generator 29, and the suspension hook 32 of the existing trolley 25 is connected to the suspension fitting 33 at the lower part of the steam generator 29. The steam generator 29 is laid down on a carriage 35 carried on the work floor 34 of the reactor containment vessel 21.

  Next, the steam generator 29 laid down on the carriage 35 is lifted in a horizontal state by the wire jacking device 26 of the auxiliary trolley 28 and the wire winder 24 of the existing trolley 25, and then the carriage 35 is stored in the reactor. Retreat out of container 21.

  Next, even if the steam generator 29 is erected as it is, the wire jacking device 26 of the auxiliary trolley 28 and the wire winding of the existing trolley 25 are taken until the lowermost part of the steam generator 29 reaches a height that does not touch the work floor 34. The machine 24 is operated.

  Next, the existing trolley 25 is moved to the auxiliary trolley 28 side until the hanging hook 32 becomes substantially vertical, and the wire jacking device 26 of the auxiliary trolley 28 is operated to raise the steam generator 29.

  Next, the suspension hook 32 is disconnected from the suspension fitting 33, and the steam generator 29 is moved to a position just above the installation position by turning the crane garter 23 and traversing the auxiliary trolley 28 while the steam generator 29 is suspended vertically. .

  Then, the steam generator 29 is suspended by the wire jacking device 26 of the auxiliary trolley 28, and the steam generator 29 is installed in the reactor containment vessel 21 as indicated by a one-dot chain line in the drawing.

JP-A-8-271670 JP 2009-102972 A JP-A-10-59691 JP 2014-2104025 A

  According to the existing installation method described above, the steam generator as a heavy object can be reliably installed in the reactor containment vessel 21, but there are the following problems.

  In order to install the auxiliary trolley 28 on the crane girder 23, the hydraulic crane is carried into the reactor containment vessel 21, and the auxiliary trolley 28 is overlaid and installed by the hydraulic crane. At that time, a large crane for carrying the hydraulic crane into the reactor containment vessel 21 is required outside the reactor containment vessel 21.

  Further, once the hydraulic crane is carried into the reactor containment vessel 21, the work area in the reactor containment vessel 21 is narrowed, and the work efficiency in the reactor containment vessel 21 is reduced.

  Furthermore, it is necessary to install a temporary duct for discharging the exhaust gas discharged from the hydraulic crane to the outside of the reactor containment vessel 21.

  Therefore, the object of the present invention is to eliminate the need for a large crane to carry a hydraulic crane into the reactor containment vessel, and to facilitate the installation of the auxiliary trolley to the polar crane. It is to provide an installation method.

  The present invention has been made to achieve the above object, and is characterized by the following.

  The invention described in claim 1 is a method for installing an auxiliary trolley on a polar crane in a nuclear reactor containment vessel, wherein a plurality of telescopic heavy lifting devices are opposed to each other on a work floor in the nuclear reactor containment vessel. Assembling, a jack receiving beam is stretched between the tops of the adjacent heavy lifting devices, a lifting stage is installed on the jack receiving beam via a jack, and a lifter having a swivel base is placed on the lifting stage by the polar crane. The lifting stage is lifted together with the lifter by the jack, the auxiliary trolley is placed on the swivel by the polar crane, the lifting stage is lifted together with the jack by the heavy lifting device, and the lifter To raise the auxiliary trolley together with the swivel to the upper side of the polar crane. After the auxiliary trolley was horizontally rotated by the platform, the lifter by lowering the auxiliary trolley on the polar crane, thus, it has the characteristics to be installed with the auxiliary trolley to the polar crane.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the jack comprises a wire jacking device.

  According to this invention, there is no need to carry the hydraulic crane into the reactor containment vessel, so there is no need to install a large crane for carrying the hydraulic crane outside the reactor containment vessel.

  In addition, according to the present invention, since it is not necessary to carry a hydraulic crane into the reactor containment vessel, it can be installed by a polar crane in the reactor containment vessel, and the work area in the reactor containment vessel is narrow. Never become. Therefore, there is no possibility that the work efficiency in the reactor containment vessel is lowered.

  Further, according to the present invention, there is no need to carry the hydraulic crane into the reactor containment vessel, so there is no need to install a temporary duct for exhausting the exhaust gas discharged from the hydraulic crane to the outside of the reactor containment vessel. .

It is a front view which shows the state which installed the lifter which has a swivel base on the raising / lowering stage by this invention. It is a side view which shows the state which installed the lifter which has a swivel base on the raising / lowering stage by this invention. It is a front view which shows the state which raised the raising / lowering stage with the lifter with the wire jacking apparatus by this invention. It is a side view which shows the state which raised the raising / lowering stage with the lifter with the wire jacking apparatus by this invention. It is a front view which shows the state which installed the auxiliary trolley on the turntable with the polar crane by this invention. It is a side view which shows the state which installed the auxiliary trolley on the turntable with the polar crane by this invention. It is a front view which shows the state which raised the raising / lowering stage with the wire jacking apparatus by the heavy article raising / lowering apparatus by this invention. It is a side view which shows the state which raised the raising / lowering stage with the wire jacking apparatus by the heavy article raising / lowering apparatus by this invention. It is a front view which shows the state which raised the auxiliary | assistant trolley with the swivel base above the polar crane by this invention, and rotated horizontally. It is a side view which shows the state which raised the auxiliary | assistant trolley by the lifter to the upper part of the polar crane with the swivel, and rotated horizontally. It is a front view which shows the state which lowered | hung the auxiliary trolley on the polar crane with this lifter by this invention. It is a side view which shows the state which lowered | hung the auxiliary trolley on the polar crane with this lifter by this invention. It is a front view which shows the state which installed the auxiliary trolley to the polar crane by this invention. It is a side view which shows the state which installed the auxiliary trolley to the polar crane by this invention. It is a front view which shows a heavy article raising / lowering apparatus. It is a top view which shows a heavy article raising / lowering apparatus. It is sectional drawing which shows the existing installation method of a steam generator.

  One embodiment of the method of installing the auxiliary trolley on the polar crane in the reactor containment vessel of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a state in which a lifter having a swivel base is installed on a lifting stage according to the present invention. FIG. 2 is a side view showing a state in which a lifter having a swivel base is installed on a lifting stage according to the present invention. FIG. 3 is a front view showing a state in which the lifting stage is lifted together with the lifter by the wire jacking device according to the present invention, and FIG. 4 is a drawing of the lifting stage lifted together with the lifter by the wire jacking device according to the present invention. FIG. 5 is a front view showing a state in which the auxiliary trolley is installed on the swivel base by the polar crane according to the present invention. FIG. 6 is a front view showing the state in which the auxiliary trolley is placed on the swivel base by the polar crane according to the present invention. FIG. 7 is a side view showing an installed state, and FIG. 7 shows a lifting / lowering stage together with a wire jacking device according to the present invention. FIG. 8 is a side view showing a state in which the lifting stage is lifted together with the wire jacking device by the heavy lifting device according to the present invention, and FIG. 9 is assisted by the lifter according to the present invention. FIG. 10 is a front view showing a state in which the trolley is raised above the polar crane together with the swivel base and horizontally rotated. FIG. 10 is a perspective view of the present invention. FIG. 11 is a front view showing a state where the auxiliary trolley is lowered onto the polar crane by the lifter according to the present invention, and FIG. 12 is a front view showing the state where the auxiliary trolley is moved onto the polar crane by the lifter according to the present invention. FIG. 13 is a side view showing the lowered state, and FIG. 13 shows a state where the auxiliary trolley is installed on the polar crane according to the present invention. Rear view, FIG. 14, this invention is a side view showing a state in which mounting the auxiliary trolley to a polar crane.

  1 to 12, 1 is a reactor containment vessel, 2 is a polar crane installed in the reactor containment vessel 1, 3 is a work floor installed in a lower part of the polar crane 2, These are four telescopic heavy lifting devices assembled on the work floor 3 so as to face each other. The heavy lifting device 4 will be described later. Reference numeral 5 denotes a pair of jack receiving beams stretched between the tops of the heavy load lifting and lowering device 4, and reference numeral 6 denotes a wire jacking device installed on the jack receiving beam 5. Two wire jacking devices 6 are installed inside each jack receiving beam 5, for a total of four. The wire jacking device 6 will be described later. 7 is a lift stage that is intermittently raised and lowered by the wire jacking device 6, 8 is a lifter having a swivel base 14 installed on the lift stage 7, and 15 is placed on the swivel base 14 of the lifter 8. Auxiliary trolley. The auxiliary trolley 15 will be described later.

  For example, the heavy lifting device 4 disclosed in Patent Document 2 is used as the heavy lifting device 4. Hereinafter, the heavy lifting device 4 will be described with reference to the drawings.

  FIG. 15 is a front view showing the heavy article lifting apparatus, and FIG. 16 is a plan view showing the heavy article lifting apparatus.

  As shown in FIGS. 15 and 16, the heavy article lifting device 4 has an outer support 9 </ b> A, an intermediate support 9 </ b> B, and an inner support 9 </ b> C that are nested, and can be moved up and down by a plurality of outer lifting / lowering means 10 </ b> A and inner lifting / lowering means 10 </ b> B. The above-described jack receiving beam 5 is stretched between the tops of the inner support columns 9C.

  10 A of outer raising / lowering means and the inner raising / lowering means 10B consist of the wire jacking apparatus disclosed by patent document 3, for example. The wire jacking device will be described later.

  The outer elevating means 10A includes an outer strand 11A stretched between the upper and lower ends of the intermediate strut 9B, and an outer jack body 12A fixed to the outer strut 9A and extendable and contracted by a hydraulic pump. The outer jack body 12A includes first gripping means provided on the movable side and second gripping means attached to the fixed side of the outer jack body 12A. When the outer jack body 12A is extended, the first gripping means is: At the same time, the second gripping means releases the grip of the outer strand 11A while the first gripping means releases the grip of the outer strand 11A when the outer jack body 12A is contracted. At the same time, the second gripping means grips the outer strand 11A, and thus the inner strut 9B moves up and down intermittently together with the inner strut 9C with respect to the outer strut 9A by the expansion and contraction of the outer jack body 12A.

  The inner lifting / lowering means 10B includes an inner strand 11B stretched between upper and lower ends of the inner column 9C, and an inner jack body 12B fixed to the intermediate column 9B and extendable / contracted by a hydraulic pump. The inner jack body 12B includes first gripping means provided on the movable side and second gripping means attached to the fixed side of the inner jack body 12B. When the inner jack body 12B is extended, the first gripping means is: At the same time, the second gripping means releases the grip of the inner strand 11B while the first gripping means releases the grip of the inner strand 11B when the inner jack body 12B is contracted. At the same time, the second gripping means grips the inner strand 11B, and thus the inner strut 9C moves up and down intermittently with respect to the intermediate strut 9B by the expansion and contraction of the inner jack body 12B. These raising / lowering is smoothly performed by the guide member 13 which consists of a chill tank etc. which were attached between each support | pillar 8A, 8B, 8C.

  In this way, the intermediate strut 9B moves up and down with the inner strut 9C relative to the outer strut 9A, and the inner strut 9C moves up and down relative to the intermediate strut 9B.

  The wire jacking device 6 has the same structure as the above-described outer lifting means 10A and inner lifting means 10B. That is, it consists of a strand 16 whose upper end is fixed to the lower surface of the jack receiving beam 5 and a jack body 17 that moves up and down intermittently along the strand 16, and the lifting stage 7 is attached to the jack body 17. Accordingly, by operating the four wire jacking devices 6 in synchronization, the elevating stage 7 moves up and down while maintaining a horizontal state.

  The auxiliary trolley 15 includes a carriage 18 that travels along the polar crane 2 and a jack 19 installed on the carriage 18. The jack 19 is a jack disclosed in Patent Document 4, for example.

  Next, a method for installing the auxiliary trolley on the polar crane in the reactor containment vessel according to the present invention will be described with reference to the drawings.

  First, as shown in FIGS. 1 and 2, four telescopic heavy lifting devices 4 are assembled on the work floor 3 in the reactor containment vessel 1 so as to face each other. Next, as shown in the figure, the jack receiving beam 5 is stretched between the tops of adjacent heavy article lifting devices 4, that is, between the tops of the inner supports 9 </ b> C of the heavy weight lifting device 4. Next, as shown in the figure, the wire jacking device 6 is installed on the jack receiving beam 5, and the elevating stage 7 is installed on the jack body 17 of the wire jacking device 6. And the lifter 8 which has the turntable 14 with the polar crane 2 is installed on the raising / lowering stage 7 as shown in the figure.

  Next, as shown in FIGS. 3 and 4, the lifting stage 7 is lifted together with the lifter 8 by the wire jacking device 6.

  Next, as shown in FIGS. 5 and 6, the auxiliary trolley 15 is installed on the turntable 14 by the polar crane 2.

  Next, as shown in FIGS. 7 and 8, the lifting / lowering stage 7 is lifted together with the wire jacking device 6 by the heavy load lifting / lowering device 4.

  Next, as shown in FIGS. 9 and 10, the lifter 8 raises the auxiliary trolley 15 together with the swivel base 14 above the polar crane 2, and the swivel base 14 turns the auxiliary trolley 15 by 90 ° in the horizontal direction.

  Next, as shown in FIGS. 11 and 12, the auxiliary trolley 15 is lowered onto the polar crane 2 by the lifter 8.

  In this way, by lowering the auxiliary trolley 15 onto the polar crane 2 by the lifter 8, the auxiliary trolley 15 can be installed on the polar crane 2 as shown in FIGS.

  In order to remove the auxiliary trolley 15, a process reverse to the installation process may be performed.

  As described above, according to the present invention, since it is not necessary to carry a hydraulic crane into the reactor containment vessel 1, it is not necessary to install a large crane for carrying the hydraulic crane outside the reactor containment vessel 1.

  Moreover, according to this invention, since it is not necessary to carry in a hydraulic crane in the reactor containment vessel 1, the work area in the reactor containment vessel 1 does not become narrow. Therefore, there is no possibility that the work efficiency in the reactor containment vessel 1 is lowered.

  Further, according to the present invention, since it is not necessary to carry the hydraulic crane into the reactor containment vessel 1, it is necessary to install a temporary duct for exhausting the exhaust gas discharged from the hydraulic crane to the outside of the reactor containment vessel 1. There is no.

1: Reactor containment vessel 2: Polar crane 3: Work floor 4: Heavy load lifting device 5: Jack receiving beam 6: Wire jacking device 7: Lifting stage 8: Lifter 9A: Outer column 9B: Intermediate column 9C: Inner column 10A: Outer lifting means 10B: Inner lifting means 11A: Outer strand 11B: Inner strand 12A: Outer jack body 12B: Inner jack body 13: Guide member 14: Swivel table 15: Auxiliary trolley 16: Strand 17: Jack body 18: Dolly 19: Jack 21: Reactor containment vessel 22: Polar crane 23: Crane gutter 24: Wire winder 25: Existing trolley 26: Wire jacking device 27: Strand winder 28: Auxiliary trolley 29: Steam generator 30: Hanging beam 31: Trunnion 32: Hanging hook 33: Ri fitting 34: working floor 35: truck

Claims (2)

In a method for installing an auxiliary trolley on a polar crane in a reactor containment vessel,
On the work floor in the reactor containment vessel, a plurality of telescopic heavy lifting devices are assembled to face each other, a jack receiving beam is stretched between the tops of the adjacent heavy lifting devices, and a jack is connected to the jack receiving beam. An elevator stage is installed via the polar crane, a lifter having a swivel base is installed on the elevator stage, the elevator stage is lifted together with the lifter by the jack, and the auxiliary trolley is pivoted by the polar crane. It is installed on a table, the lifting stage is lifted together with the jack by the heavy lifting device, the auxiliary trolley is lifted together with the swivel by the lifter, and the auxiliary trolley is lifted by the swivel. After rotating horizontally, the auxiliary trolley is placed on the polar crane by the lifter. Is lowered, thus, the auxiliary, characterized in that the mount on the polar crane trolley, mounting method of the auxiliary trolley to a reactor containment vessel polar crane.   The method for installing an auxiliary trolley on a polar crane in a reactor containment vessel according to claim 1, wherein the jack comprises a wire jacking device.

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