JP2000275388A - Pump equipment of reactor power station and its maintenance equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the exposure of workers during checkup by efficiently arranging a vertical axis pump with hanging type support, suction valve and discharge valve of the pump and the shortest piping including radioactive fluid without increasing the component arrangement area, the dimensions and volume of building. SOLUTION: A vertical pump 3 and suction valves and discharge valves 8 accompanying the vertical pump 3 supported from the building ceiling or wall are arranged in a neighboring building to the pump station or upstairs or downstairs thereof so that the pump body 4 and valves 8 are separated in placing positions. By separating in this manner, checking capability for the vertical pump 3 and valves 8 is ensured, economical piping route is constituted and the building height can be limited to the pump height plus pump maintenance height in the pump arrangement area. Also, the building height in the valve area can be only maintenance height, so the building inside height can be reduced and exposure during disassembling and checkup work can be reduced by separating the maintenance work area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump facility and a maintenance facility for a nuclear power plant.

[0002]

2. Description of the Related Art Pump equipment in a conventional nuclear power plant will be described with reference to FIG. In FIG. 16, reference numeral 1 denotes, for example, a building frame of a nuclear power plant, 2 denotes an equipment room, and 3 denotes a vertical axis pump. The vertical axis pump 3 mainly includes a pump body 4 and a pump casing 5, and is installed by being suspended from a ceiling of the equipment room 2 via a pump support 6.

In a nuclear power plant, a vertical axis pump 3 suspended from a building frame 1 or the like is provided for maintenance of a pump body 4 and maintenance of a suction valve and a discharge valve 8 attached to a pipe 7 of the vertical axis pump 3. In order to secure the property without a special piping route, it is installed in the equipment room 2 with a high floor.

[0004] Maintenance of the vertical pump 3 is performed by pulling out the motor, rotor, impeller and the like incorporated in the pump body 4 with the pump body 4 turned vertically downward. Since the suction port and the discharge port are provided at the upper part of the pump, the suction and discharge pipes 7, the suction valve and the discharge valve 8 are located above the vertical axis pump 3, that is, the vertical axis pump 3 is installed unless otherwise specified. It is installed above the equipment room 2.

In this case, in order to ensure the maintainability of both the pump body 4 and the suction valve and the discharge valve 8, a height L above which the worker 10 can access the respective valves 8 is required above the equipment room 2. In addition, at the same time, a space and a height L that can be used as a maintenance area by the worker 10 when maintaining the vertical axis pump 3 are required.

Accordingly, the floor height in the equipment room 2 is
The access height L of 10 (usually about 1.8 m or more) and twice the thickness of the gantry 9 are required at a minimum, which hinders the reduction of the height of the equipment room 2. Also, in the installation work of the vertical axis pump 3, the vertical axis pump 3 is lifted and installed in the vertical direction.

Further, if the vertical pump 3 transfers radioactive fluid, the workers will be exposed to radiation during the maintenance work.
In this case, the reduction of the access height L is accompanied by a deterioration in workability and a delay in work, and further leads to an increase in exposure.

Here, a conventional maintenance method of the hanging vertical pump 3 will be described with reference to steps a to h of FIG. a. After the fluid in the pump casing 5 and the motor is drained and washed, the incidental equipment 12 and the like that disturb the disassembly of the motor cooling piping and the like are removed. b. In order to pull out the motor unit 15 including the impeller 13 and the rotor 14 vertically downward, the motor unit 15 is supported by a lifting machine 16 such as a chain block via a suspension hook attached to the pump casing 5.

C. Remove the part that mechanically joins the motor unit 15 and the pump casing 5 (the nut 17
etc). d. The motor unit 15 is suspended from the movable carriage 11 provided below the vertical axis pump 3 using the lifting machine 16. e. In order to pull out the impeller 13 and the rotor 14 upward from the motor unit 15, the monorail 18,
The motor unit 15 is moved by the cart 11 to a pump maintenance area where the lifting machine 16 in which a hanging hook or the like is installed can be used.

F. For disassembly of the motor unit 15,
Move the motor unit 15 from the trolley 11 to the motor unit support base
Relocated to 19. g. The impeller 13 is pulled out vertically from the rotor 14 by a human power or a lifting machine 16. h. Next, the rotor 14 is pulled vertically upward from the motor casing 20 by the lifting machine 16. i. Also remove the motor rear cover 21. j. After the inspection and cleaning of the disassembled parts, the assembling is performed in reverse of a series of operations.

As described above, the maintenance work of the vertical axis pump 3 is performed. In order to disassemble the motor unit 15, the removal height A of the rear cover 21 from the floor, the height B of the motor casing 20, and the removal height of the rotor 14 are required. C and the required height D of the lifting machine 16 are required.

[0012]

When the vertical pump 3 is installed, the pump body 4 is long in the vertical direction, and the maintenance of the vertical pump 3 requires the motor unit 15 including the motor and the impeller from the pump casing 5. Due to the need for a height for vertical disassembly and disassembly and the need for height dimensions for the maintenance space for the pump 3 and the valve 8 associated with the pump 3, the vertical The arrangement of the pump 3 is limited to a portion having a sufficient effective floor height.

Further, installation of the vertical axis pump 3 is a work at a high place, which requires not only time and labor, but also requires disassembly of the motor and impeller of the vertical axis pump 3 when the motor unit 15 including them is disassembled. Is drawn out of the pump casing 5 in the vertical direction, and then transported to the laydown area. Thereafter, the impeller 13 and the rotor 14 are pulled out and disassembled by using the lifting machine 16 or the like. Therefore, work is troublesome, and in particular, a pump for transferring a radioactive fluid poses a problem of radiation exposure of workers.

In order to reduce the cost of the plant equipment of the nuclear power plant, it is desired to reduce the size of the building and to rationalize the construction. For the maintenance work of the plant, it is desired to increase the work efficiency of the workers and reduce the radiation exposure. At the time of installation, arrangement of pipes, valves and the like, and maintenance of pumps, it is desired to reduce the amount of work and the amount of exposure, and it is an issue to satisfy these demands.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to reduce the floor height of a building in which a hanging support type vertical pump is installed, to improve workability, to save labor for pump maintenance work, An object of the present invention is to provide a pump facility of a nuclear power plant and a maintenance facility for the purpose of reducing radiation exposure and arranging the number of maintenance devices rationally.

[0016]

According to the first aspect of the present invention, a vertical axis pump is suspended from a ceiling in an equipment room with a low floor height,
A pipe associated with the vertical axis pump, a suction valve and a discharge valve are arranged in an adjacent room adjacent to the equipment room.

According to a second aspect of the present invention, a vertical axis pump is suspended from a ceiling in an equipment room having a low floor height, and a pipe associated with the vertical axis pump is installed in an upper room provided on the upper floor of the equipment room. A suction valve and a discharge valve are arranged.

According to a third aspect of the present invention, a vertical pump is suspended from the ceiling in the equipment room, a hatch is provided on a floor located below the vertical pump in the equipment room, and a lower floor of the equipment room is provided. And a maintenance room.

According to a fourth aspect of the present invention, a maintenance room is provided on the lower floor of the equipment room where the vertical axis pump is installed, and the pump casing portion of the vertical axis pump is supported and fixed to the floor frame of the equipment room building. The pipe side of the vertical axis pump is arranged in the equipment room, and the pump body side is divided by the building floor frame so as to be arranged in the maintenance room.

According to a fifth aspect of the present invention, at least two adjacent pump chambers are provided in the building body, a maintenance area is provided in front of the plurality of pump chambers, and the maintenance area is used by the plurality of pump chambers. It is characterized by providing a curtain for shielding.

According to a sixth aspect of the present invention, a pump chamber having an entrance and exit is provided in a building body, a maintenance area for maintaining a pump is provided in the pump chamber, and a shield capable of sliding in the lateral direction is provided in the maintenance area. It is characterized by installing a door.

A seventh aspect of the present invention provides a pump chamber of a building in which a vertical pump supported from a ceiling or a wall of a building via a steel material is installed. Stand, pump suction,
Discharge pipes and valves, buried equipment, and other equipment are preliminarily attached to a driving form to form an integrated structure, and this integrated structure is directly suspended at a predetermined position on a construction site to form a ceiling of the pump room. It is characterized by doing.

[0023] The invention of claim 8 is characterized in that not only the pump body of the vertical axis pump and the equipment associated with the pump are installed in the pump room of the building where the vertical axis pump supported from the ceiling or the wall of the building via a steel material is installed. The other equipment is made into a large block structure as a unit of floor, wall, room, etc. using a driving form, reinforcing material, other steel material, etc., and this large block structure is directly placed at a predetermined position on the construction site. It is characterized by being suspended to constitute a ceiling of the pump chamber.

According to a ninth aspect of the present invention, there are provided a plurality of bolts attached to a pump casing of a longitudinal axis pump, a shielding lid inserted and attached to the bolts, and a hinge attached to the shielding lid and movable in a plane direction. And a support base with a ball screw attached to the hinge and capable of moving in a vertical direction.

According to a tenth aspect of the present invention, there is provided a frame for fixedly supporting a motor, an impeller and the like drawn vertically from a pump body of a longitudinal axis pump, a bogie having a moving wheel and the like added to the frame, A support rotation mechanism that supports and rotates the impeller in a vertical plane and a fixing mechanism that fixes the rotation position are provided. The invention of claim 11 is characterized in that a bogie fixing mechanism is provided below the bogie.

According to a twelfth aspect of the present invention, a plurality of pulleys are mounted on a wall of a pump chamber in which a vertical axis pump is installed, a rope is hooked on the pulley, and the rope is mounted on a carriage on which the vertical axis pump is mounted. Characterized in that the carriage is caused to travel by the movement of the carriage.

According to a thirteenth aspect of the present invention, a guide rail is laid on the floor of the pump chamber, and a guide rail coupling mechanism for running the carriage along the guide rail is provided on the carriage. And The invention according to claim 14 is characterized in that a rail is laid on the floor of the pump chamber, and a rail coupling mechanism for traveling on the rail is provided on the bogie.

In the vertical axis pump equipment according to the present invention having the above configuration, the size and volume of the equipment room or the pump chamber in which the vertical axis pump is installed can be reduced. In the case of a vertical pump for transferring a radioactive fluid, work safety can be ensured and labor costs can be reduced by reducing radiation exposure during maintenance work.

Further, the prior installation of equipment, the shortening of the construction period by adopting the large module construction method, and the common use of the exposure reduction device make it possible to eliminate the labyrinth for shielding, thereby reducing the cost and the plane size. it can.

On the other hand, in a pump maintenance facility, a motor and an impeller attached to a vertical axis pump are pulled out, and a truck for moving the same is provided with a frame rotating mechanism, a truck fixing mechanism, a remote control function, and the like. Safety at the time of maintenance work can be ensured, the positioning of the bogie is simplified, the amount of work for pump maintenance can be reduced, and the radiation exposure of workers due to this can be reduced.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the vertical axis pump equipment according to the present invention will be described with reference to FIG. In FIG. 1,
The same parts as those in FIG. 16 are denoted by the same reference numerals, and the description of the overlapping parts will be omitted. In the present embodiment, an equipment room 24 having a lower floor height than the conventional example is provided in a building frame 23, and the vertical pump 3 is suspended from the ceiling in this equipment room 24 and provided adjacent to the equipment room 24. That is, a pipe 7 and a suction valve and a discharge valve (hereinafter, referred to as a valve) 8 are arranged in the adjacent chamber 25.

That is, in FIG. 1, the pipe 7 and the valve 8 associated with the vertical pump 3 are arranged in the adjacent room 25 adjacent to the equipment room 24 in which the vertical pump 3 is installed. Place in parallel. This allows the equipment room in the pump side area
Maintenance of the valve above the inside of 24 is not necessary because there is no valve, only the required height for pump maintenance
The floor height within can be determined.

The valve area can be set by considering only the position of the valve 8 irrespective of the required height of the pump maintenance, regardless of the required height of the pump maintenance. It is possible to reduce the height.

Further, since the floor height is reduced and the length of the support structure (hereinafter referred to as the pump support 6) of the suspension type vertical pump 3 is shortened, the moment applied to the pump support 6 is also reduced, and the earthquake resistance is achieved. Performance can be improved.

When the vertical pump 3 and the valve 8 are separated by a wall, the piping 7 arranged on the pump area side is set to be the shortest from the viewpoint of economy. The length of the piping inside is shorter than when the valves are arranged in the same room, which means that the radiation source in the equipment room 24 is reduced when the vertical pump 3 transfers radioactive fluid. Therefore, it is possible to reduce the radiation exposure of the worker during the pump maintenance.

Next, a second embodiment of the present invention will be described with reference to FIG. In this embodiment, as shown in FIG. 2, the vertical pump 3 is suspended from the ceiling in the equipment room 24 having a low floor height, and the vertical pump is placed in the upper room 26 provided on the upper floor of the equipment room 24. That is, the piping 7 and the valve 8 associated with 3 are arranged.

According to the present invention, the valve 8 associated with the vertical pump 3 is arranged in the upper floor room of the equipment room 24 in which the vertical pump 3 is installed, and the vertical pump 3 and the valve 8 are vertically moved. Classify.
Thus, the floor height in the equipment room 24 can be determined only by the necessary height for pump maintenance, as in the above embodiment.

In the valve area, the valve 8 can be arranged near the floor level.
An access height of about 10 is sufficient, and the degree of freedom in setting the height of the upper floor room 26 where the valve is installed is improved, and the floor height of the equipment room 24 can be reduced. Further, as described above, it is possible to improve the earthquake resistance and to reduce the radiation exposure of the operator at the time of pump maintenance when handling a radioactive fluid.

Next, a third embodiment of the invention corresponding to claim 3 will be described with reference to FIG. In this embodiment, the vertical pump 3 is suspended from the ceiling in the equipment room 2 having a high floor,
A hatch on the floor located below the vertical pump 3 in the equipment room 2
28, and a maintenance room 29 is provided in a lower floor room of the equipment room 2 in which the vertical axis pump 3 is installed.

Here, the conventional maintenance procedure d in FIG.
In e, the pump unit 5 is connected to the motor unit 15
In order to pull out the motor, it was necessary to suspend the motor unit 15 from the pump casing bolt 22 downward, whereby the minimum height from the pump installation position to the floor was determined.

However, according to the present embodiment, the hatch 28 is provided on the floor 27 below the pump 3 so that the thickness of the hatch 28 that can handle the hatch 28 under the pump is large. The motor unit 15 can be pulled out and transferred to the maintenance room 29 on the lower floor irrespective of the floor height of the area, so that the floor height of the pump installation area can be reduced.
In addition, maintenance can be performed in an area on the lower floor where there is no piping containing a radioactive fluid, and exposure during maintenance can be reduced.

Next, a fourth embodiment of the invention corresponding to claim 4 will be described with reference to FIG. In the present embodiment, a maintenance room 29 is provided on the lower floor of the vertical axis pump 3, and the pump casing 5 of the vertical axis pump 3 is directly supported and fixed from the frame 27 of the floor 27 via a steel support member 30. .

According to the present embodiment, it is possible to support the vertical pump 3 near the center of gravity, and as shown in FIG.
Since the moment can be reduced as compared with the case of installing, it contributes to improvement of earthquake resistance.

When the vertical pump 3 handles a radioactive fluid, the radioactive fluid does not flow downward from the pump casing 5, that is, from below the slab lower end level of the floor 27.
This is because the motor portion is provided below the pump casing 5.

Therefore, in both the normal pump operation and the maintenance of the vertical pump 3, the radiation side of the motor side area is limited to the pump casing 5, so that the exposure of workers in this area can be reduced. It becomes possible.

Next, a fifth embodiment of the invention corresponding to claim 5 will be described with reference to FIG. In the present embodiment, as shown in FIG. 5, a vertical partition wall 32 and a horizontal partition wall 33 partition a right pump chamber 34 and a left pump chamber 35 in a building frame 31. The right pump 3a is disposed in the right pump chamber 34, and the left pump 3b is disposed in the left pump chamber 35.

The curtain rail 36 is provided on the front of the horizontal partition wall 33.
And a shielding curtain 37 is attached to the curtain rail 36. An entrance 38 is provided in the building frame 31, and a space between the entrance 38 and the curtain rail 36 is a maintenance area 39.

That is, in the present embodiment, a pump chamber for transferring two radioactive fluids adjacent to each other through the shielding curtain 37.
Shared by 34 and 35. Normally, two or more pumps for radioactive fluid of a nuclear power plant for the same application are installed in consideration of redundancy.

Therefore, during such maintenance of the pumps 3a and 3b, of the plurality of pumps 3a and 3b,
At least one vehicle may always be in operation. In addition, pumps 3 of the same use are
As for a and 3b, the maintenance area 39 may be shared as shown by the shaded portion in FIG.

In this case, at the time of maintenance of the left pump 3b in the figure, a worker in the maintenance area 39 is exposed to radiation from the right pump 3a in front of the entrance of the right pump chamber 34. When the right pump 3a is operating, the amount of exposure to the worker increases.

On the other hand, in the present embodiment, a shielding curtain 37 made of a material having shielding performance is shared via a curtain rail 36 in front of the entrances of the two pump chambers 34 and 35 sharing the maintenance area 39. During maintenance of the pump 3a, the radiation of the worker in the maintenance area 39 due to the radiation from the left pump 3b can be reduced, and the part of the maintenance area 39 in front of the pump chambers 34 and 35 can be effectively used as a work area. .

Next, a sixth embodiment of the invention corresponding to claim 6 will be described with reference to FIG. In this embodiment, as shown in FIG. 6A, a pump chamber 40 having an entrance 38 and a maintenance area 39 is provided in a building frame 31, and a vertical pump 3 is installed in the pump chamber 40. The shaft pump 3 is provided with a shielding door 41 having a mechanism for sliding in the horizontal direction on the front surface of the vertical pump 3. FIG.
(B) is a conventional arrangement of pump equipment, in which a vertical axis pump 3, a pipe 7 and a valve 8 are a radiation source from the inlet of the pump chamber.
A labyrinth wall 42 is provided so that the user cannot see directly, and a labyrinth passage 43 is formed to form a maze.

In the present embodiment, by installing the shielding door 41 having a sliding mechanism, the vertical pump 3, which is a radiation source, is not used when the vertical pump 3 is pulled out to the maintenance area 39 during maintenance. The shielding door 41 can be closed with respect to the valve 8 so as not to look directly.

In addition, during pump maintenance, the work is performed in an area where the pipe 7 and the valve 8 are not directly seen as compared with the conventional case, so that the exposure of the worker can be reduced. Further, the conventional labyrinth wall 42 for shielding becomes unnecessary, and the space in the pump chamber 40 can be reduced by eliminating the labyrinth passage 43.

Next, a seventh embodiment of the present invention will be described with reference to FIG. In this embodiment, as shown in FIG. 7, the pump support 6, the pipe support 45 and the duct support 46 are fixed to the driving formwork 44, the pump casing 5 is attached to the pump support 6, and the pipe 7 is connected to the pipe support 45. The mounting of the duct 47 on the duct support 46 is the ceiling of the pump room.

That is, a pump (not shown), a pump casing 5, which is a part of the pump, a pump support 6, a pedestal (not shown), a pump suction / discharge pipe 7, a valve (not shown), and a duct 47 , A cable tray (not shown), equipment for burying a skeleton (not shown), and other equipment are previously mounted on the driving formwork 44 to form an integral structure.

According to the present embodiment, the pump room is suspended at a predetermined position on the construction site by a large lifting machine (not shown) through a hanging tool 48 and an integral structure having a driving form 44. Ceiling. The effect of this is that, after the integral structure is suspended, a reinforcing bar (not shown) is installed on the upper surface of the driving formwork 44 and the floor is constructed by casting concrete.

The ceiling (floor) of the building is easily constructed by connecting the pipe 7 and the equipment such as the duct 47 with the lower surface of the driving formwork 44 as it is. Therefore, it is possible to greatly reduce the on-site work and shorten the construction period. In addition, the installation of a hanging-type support pump is not performed in a small area inside the pump room after the building is built, but in a work space with good workability at the factory when building an integrated structure or outside the building. This makes it possible to improve work efficiency.

Next, an eighth embodiment of the present invention will be described with reference to FIG. In the present embodiment, as shown in FIG. 8, not only the pump casing 5 and the pump support 6 of the vertical axis pump 3 but also other equipment such as the cable tray 49 are driven. Formwork
44, a large block (floor block) 51 is used as a floor unit by using a reinforcing material 50 for holding the weight of cast concrete and other steel materials. Also, on the upper surface of the driving formwork 44 on the floor, equipment such as a pipe 7 buried in the floor and a reinforcing bar at the lower end of the floor (not shown).
Is installed.

According to the present embodiment, the large block 51 is directly hung at a predetermined position on the construction site by the large hoist (not shown) via the balance 52 and the hanger 48. The effect of this is that after the large block 51 is hung, the upper end rebar (not shown) is constructed on the upper surface of the driving formwork 44, and concrete is cast and the floor is easily constructed.

Although the lower surface becomes the ceiling as it is, the reinforcing member 50 on the lower surface eliminates the need for setting the driving form 44 and installing and removing the support (not shown), thereby shortening the construction process and the construction period. Can be achieved. Further, the efficiency of the installation work of the suspended vertical shaft pump 3 can be improved as described above.

Next, FIG. 9 (a) and FIG.
A ninth embodiment of the invention corresponding to FIG. FIG.
(A) is a diagram showing auxiliary equipment for shielding inside the pump casing 5 during pump maintenance in the present embodiment. A flat plate having shielding performance is used as a shielding lid 53 inside the pump casing 5, and this is used as the vertical pump 3. A hinge 54 which can be moved in a plane direction from a nearby position to the center of the rotation axis of the vertical pump 3, and a lid 53 which is attached to the hinge 54 in a vertical direction;
It is constituted by being supported by a support base 55 with a ball screw, which can be supported by a ball screw (not shown). The support 55 is mechanically connected to the wall via the hinge 54.

Next, a shielding method during pump maintenance using the shielding lid 53 of the pump casing 5 of the present embodiment will be described with reference to FIGS. After the motor unit 15 is detached from the pump casing 5 in the state shown in the maintenance procedures d and e in FIG. 17, the shield lid 53 and the support base 55 with the ball screw are moved to the axial center position of the pump casing 5 by the hinge 54. As shown in FIG. 9B, the position of the bolt insertion hole 57 set in the shielding cover 53 and the position of the pump casing bolt 56 attached to the casing are adjusted. At this time, the shielding cover 53 is rotatable on the support base 55 with respect to the vertical axis.

Next, by operating the ball screw with a handle (not shown) for operating the ball screw, the vertical and vertical shielding lid 53 is supported by its weight, and the bolt 56 is passed through the bolt insertion hole 57 of the shielding lid 53. It is attached to the pump casing 5 body. After this, the pump casing nut
The shielding lid 53 is fixed to the pump casing 5 by using 58.

By mounting the shielding lid 53, radiation from the activated portion inside the pump casing 5 can be shielded, and exposure of workers who perform maintenance work in the vicinity can be reduced. In addition, the installation work of the shielding cover 53 is an upward operation, and there is a possibility that the work may be performed at the height of the worker or more.There is a burden of supporting the weight of the shielding cover 53, but the shielding work is performed by operating the ball screw. lid
The position of 53 can be easily adjusted, and the work can be reduced.

Next, FIG. 10, FIG. 11 (a), FIG. 12, and FIG.
A tenth embodiment of the invention corresponding to claim 10 will be described. In this embodiment, as shown in FIG. 10, a frame 59 is attached to a top of a truck 61 by a support wedge 62, and a motor unit fixing member 64 having a casing fixing hole 63 is provided in the frame 59, and maintenance equipment for pump equipment is provided. It has been configured.

This embodiment shows a diagram during pump maintenance.
The maintenance equipment for handling the motor unit 15 shown in FIG. That is, the pump casing 5 of the vertical axis pump 3
A wheel 60 serving also as a rotating shaft and a support base for the rotating shaft that enables the motor unit 15 fixed to a frame 59 fixedly supporting the motor unit 15 and the frame 59 to be rotatable together with the frame 59 in a vertical plane.
Support wedge 62 for fixing the rotational position of a truck 61
A motor unit fixing member 64 having a casing fixing hole 63 provided in 59.

Next, a pump maintenance method using the maintenance equipment of the present embodiment will be described with reference to FIGS.
This will be explained using 5, 17. The maintenance procedure d in FIG.
After the motor unit 15 is removed from the pump casing 5 in the state shown in FIG. 7E, the motor unit 15 is hung on the carriage 61 (reference numeral 11 in FIG. 17).

Next, the carriage 61 on which the motor unit 15 is mounted is moved from above to an area where the lifting machine 16 can be used, as shown in step f in FIG. During this movement, the frame 59 is a bogie 61
The motor unit 15 is fixed to the frame
Bolts are fixed to the frame 59 by passing bolts through the casing fixing holes 63 set at 59 and the screw holes 66 set at the pump casing 5 (see the conceptual diagram of FIG. 10 and the elevation view of FIG. 11A).

In the procedure g, the bogie 61 is fixed by the wheel stopper 65 in the usable range of the lifting machine 16. While supporting the lower part of the pump motor by the lifting machine 16, the support wedge 62 fixing the frame 59 to the carriage 61 is removed, and the lower part of the pump motor is lifted to set the pump motor rotating shaft to a horizontal position.
The support wedge 62 is inserted into a position where it can be fixed in this state, and fixed. Thereafter, the impeller 13 is pulled out of the rotor 14 in the horizontal direction by a human power or a lifting machine 16.

In step h, the rotor 14 is pulled out of the motor casing 20 in the horizontal direction by the lifting machine 16. In addition, the motor rear cover 21 and the like are also disassembled, and after inspection and cleaning of various parts, a series of operations are performed in reverse for assembly.

The maintenance work described above is performed.
In this work, the disassembly of the motor unit 15 does not require the vertical height of the removal height A of the rear cover 21 from the floor, the height B of the motor casing 20, and the removal height C of the rotor 14, as in the conventional technology. Thus, the required floor height of the maintenance area can be reduced (see FIG. 17).

Further, since the disassembly height of the impeller 13, the rotor 14, the rear cover 21 and the like is within the range of the height of the worker, the work at high places can be reduced and the work efficiency can be improved as compared with the conventional method. The number of units can be reduced.

Next, referring to FIGS. 11 (a) and 11 (b),
An eleventh embodiment of the invention corresponding to FIG. This embodiment is different from the tenth embodiment in that FIG.
11B, a bogie fixing mechanism 67 having a structure shown in FIG. 11B is provided below the bogie 61.

The bogie fixing mechanism 67 includes a handle 68, a ball screw 69 rotated by the handle 68, and a ball screw 69.
A fixed base 70 attached to the lower end of 69, a base plate 71 provided on the lower surface of the fixed base 70, a bearing 72 provided near a handle 68, and a hinge arm mounted on the fixed base 71.
It consists of 73.

The bogie fixing mechanism 67 can fix and support the weight of the bogie 61 by the operation of the ball screw 69 by rotating the handle 68. In the maintenance equipment, the wheel stopper 65 for fixing the carriage 61 can be eliminated, and work stability during pump maintenance can be ensured.

When the floor of the building has a slope for drainage or the like, the inclination of the bogie 61 can be eliminated by the present mechanism 67, and the pump parts can be pulled out and disassembled with high accuracy.

Next, FIG. 12 (a) and FIG.
A twelfth embodiment of the invention corresponding to FIG. In the present embodiment, the carriage 61 is mounted on a pulley 74 for traveling and guiding the carriage 61 in the pump chamber 40, and the carriage 61 travels by hooking a rope 75 on the pulley 74. That is, FIG.
The pulley 74 is attached to the wall of the frame 31 of the pump chamber 40 as shown in FIG.
The movement of the 15 transport vehicles 61 can be remotely controlled. A pump maintenance method using this maintenance facility will be described with reference to FIG. During maintenance of the vertical axis pump 3, the motor unit 15 may be carried to a maintenance area other than the pump chamber 40.

This is because when the vertical pump 3 is handling radioactive fluid, the pipe 7, the valve 8 and the like in the pump chamber 40 are activated or the radioactive fluid is contained in the pump chamber 40 in a state of containing the radioactive fluid. This is because it causes the worker in the pump room 40 to be exposed.

[0098] In view of the above, a labyrinth wall 42 is provided at the entrance 38 of the pump chamber 40 so as not to be exposed. When transporting the vertical axis pump 3 to the maintenance area, it is necessary to prevent workers from being exposed during transportation.

In this embodiment, as shown in FIG.
From the wall entrance 38 to the back of the pump chamber 40 until the stopper (not shown) of the bogie 61 comes into contact with the wall. Thereafter, as shown in FIG.
The pulley 61 is guided to the pump installation position by manipulating the rope 75 through pulleys 74 by human power or a mechanical drive mechanism. At this time, the worker performs a monitoring operation on the side of the labyrinth wall 42 opposite to the pump.

Next, the vertical pump 3 is disassembled, the motor unit 15 is placed on the carriage 61, and then the rope unit 75 is operated to carry the motor unit 15 out of the pump chamber 40 in the reverse procedure. By these operations, the motor unit by the cart 61
Workers are prevented from approaching the radiation source when transporting 15. Thus, radiation exposure during pump maintenance work can be reduced, and the positioning of the carriage 61 under the pump can be accurately performed by guidance with the pulley 74.

Although not shown in the present embodiment, the bogie 61 is further provided with an automatic lifting / lowering mechanism for the motor unit 15 and an automatic attachment / detachment device for joining bolts between the motor unit 15 and the pump casing 5. It is also possible to reduce the exposure of workers.

In the pump chamber 40, the floor may have a slope for collecting radioactive fluid and the like.
In order to eliminate instability due to the inclination of the bogie 61, a height adjusting mechanism may be installed on the wheels 60 of the bogie 61 so that the height can be adjusted before the operation by the rope 75.

Next, FIG. 13 (a) and FIG.
A thirteenth embodiment of the invention corresponding to FIG. The twelfth embodiment is different from the twelfth embodiment in that a guide rail 76 is laid on the floor of the pump chamber 40, and a guide rail coupling mechanism 77 for running the trolley 61 along the guide rail 76 is provided by the trolley 61. It has been established in.

According to the present embodiment, the bogie 61 with wheels 60
Can travel along the guide rail 76 by the guide rail coupling mechanism 77, the accuracy of the position of the bogie 61 guided to the pump installation position can be increased, and the exposure of the worker due to positional deviation adjustment or the like can be reduced.

Next, FIG. 14 (a) and FIG.
A fourteenth embodiment of the invention corresponding to FIG. This embodiment is different from the twelfth embodiment in that a rail 78 is laid on the floor of the pump chamber 40 and a rail coupling mechanism 79 for traveling the rail 78 is provided on the bogie 61. That is, the rail connection mechanism is attached to the carriage 61 of the motor unit 15 that can travel on the rail 78 laid on the floor of the pump room 40.
79 is attached.

According to the present embodiment, the carriage 61 is connected to the rail 78
, The accuracy of the position of guiding the bogie 61 to the installation position of the vertical axis pump 3 is increased, and the exposure of the worker due to adjustment of the displacement can be reduced. In addition, since the operation of guiding the carriage 61 to the installation area of the vertical axis pump 3 by human power is reduced, the efficiency of the transportation operation and the exposure of workers can be reduced.

According to the embodiment of the maintenance equipment,
This makes it possible to reduce the volume of the building, reduce exposure during pump maintenance, save labor, and improve workability. Costs can be significantly reduced by reducing the volume of the building, and labor costs and safety can be reduced by reducing radiation exposure during pump maintenance and labor to reduce the work, as well as shortening the construction period by improving workability. Can be achieved.

[0090]

According to the invention of the pump equipment for a nuclear power plant according to the present invention, the size and volume of the building can be reduced by dividing the arrangement of the pump body, the valve and the piping. In addition, minimize the floor height of the equipment room or pump room where the vertical axis pump is installed, and minimize the size of the radioactive fluid piping arrangement room, and reduce radiation exposure during maintenance work and cost reduction by labor saving. Can be.

On the other hand, according to the invention of the maintenance equipment,
When disassembling and inspecting the vertical pump in the vertical downward direction, remote control of the movement of the bogie on which the vertical pump or its components are mounted is performed to reduce the work of workers, reduce radiation exposure, safety, etc. be able to.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view schematically showing a first embodiment of a pump equipment according to the present invention.

FIG. 2 is a longitudinal sectional view schematically showing part of a second embodiment of the pump equipment according to the present invention.

FIG. 3 is a vertical sectional view schematically showing a third embodiment of the pump equipment according to the present invention.

FIG. 4 is a longitudinal sectional view schematically showing part of a fourth embodiment of the pump equipment according to the present invention.

FIG. 5 is a longitudinal sectional view schematically showing a fifth embodiment of the pump equipment according to the present invention.

6A is a plan view schematically showing a sixth embodiment of the pump equipment according to the present invention, and FIG. 6B is a plan view showing a conventional example in comparison with FIG.

FIG. 7 is a perspective view for partially schematically explaining a seventh embodiment of the pump equipment according to the present invention.

FIG. 8 is a perspective view for partially schematically explaining an eighth embodiment of the pump equipment according to the present invention.

9A is a plan view schematically showing a ninth embodiment of the pump equipment according to the present invention, and FIG. 9B is a perspective view showing a state where the shielding cover in FIG. FIG.

FIG. 10 is a perspective view showing a first example of the embodiment of the pump maintenance equipment according to the present invention.

11A is an elevational view showing a second example of the embodiment of the pump maintenance equipment according to the present invention in a partial cross section, and FIG. 11B is an enlarged view of the bogie fixing mechanism in FIG. FIG.

FIG. 12A is a plan view showing a third example of the embodiment of the pump maintenance equipment according to the present invention, and FIG.
FIG. 4 is a plan view showing a moving state of the bogie from the state of FIG.

FIG. 13 is a plan view showing a fourth example of the embodiment of the pump maintenance equipment according to the present invention, wherein (b) is (a).
The top view which expands and shows the principal part in.

FIG. 14A is a plan view showing a fifth example of the embodiment of the pump maintenance equipment according to the present invention, and FIG.
FIG. 2 is an enlarged plan view showing a main part in FIG.

FIG. 15 is an elevation view for explaining a maintenance procedure using the pump maintenance equipment according to the present invention.

FIG. 16 is a cross-sectional view showing an indoor arrangement of pump equipment of a conventional nuclear power plant.

FIG. 17 is an elevation view illustrating a maintenance procedure of a conventional vertical axis pump.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Building frame, 2 ... Equipment room with high floor, 3 ... Vertical axis pump, 4 ... Pump body, 5 ... Pump casing, 6 ... Pump support, 7 ... Piping, 8 ... Suction valve and discharge valve, 9 ...
Stand, 10… Worker, 11… Dolly, 12… Auxiliary equipment, 13… Impeller, 14… Rotor, 15… Motor unit, 16… Crane machine,
17 ... Nut, 18 ... Mono rail, 19 ... Motor unit support base, 20 ... Motor casing, 21 ... Rear cover, 22 ... Pump casing bolt, 23 ... Building frame, 24 ... Equipment room with low floor height, 25 ... Adjacent room, 26 ... Upstairs room, 27 ... Floor, 28 ... Hatch, 29 ... Maintenance room, 30 ... Support member, 31 ... Building frame, 32 ... Vertical partition wall, 33 ... Horizontal partition wall, 34 ... Right pump room, 35 … Left pump room, 36… curtain rail,
37… Shield curtain, 38… Entrance, 39… Maintenance area, 40… Pump room, 41… Shield door, 42… Labyrinth wall, 43… Labyrinth passage, 44… Punching formwork, 45… Piping support, 46… Duct Support, 47… duct, 48… hanger,
49: cable tray, 50: reinforcement, 51: large block (floor block), 52: balance, 53: shielding lid, 54: hinge, 55
... supporting stand, 56 ... bolt, 57 ... bolt insertion hole, 58 ... nut, 59 ... frame, 60 ... wheel, 61 ... trolley, 62 ... support wedge,
63 ... casing fixing hole, 64 ... motor unit fixing member, 65 ... wheel fixing, 66 ... screw hole, 67 ... bogie fixing mechanism, 68 ...
Handle, 69: Ball screw, 70: Fixed base, 71: Base plate, 72: Bearing, 73: Hinge arm, 74: Pulley, 75: Rope, 76: Guide rail, 77: Guide rail connection mechanism, 78
… Rail, 79… Rail connection mechanism.

Claims (14)

[Claims] 1. A vertical pump is suspended from a ceiling in an equipment room having a low floor height, and a pipe, a suction valve, and a discharge valve associated with the vertical pump are arranged in an adjacent room adjacent to the equipment room. Pump equipment for a nuclear power plant. 2. A vertical axis pump is suspended from a ceiling in an equipment room having a low floor height, and a pipe, a suction valve, and a discharge valve associated with the vertical axis pump are installed in an upper room provided on the upper floor of the equipment room. A pumping facility for a nuclear power plant, comprising: 3. A vertical pump is suspended from a ceiling in the equipment room, a hatch is provided on a floor located below the vertical pump in the equipment room, and a maintenance room is provided on a lower floor of the equipment room. A pumping facility for a nuclear power plant, comprising: 4. A maintenance room is provided in a lower floor of the equipment room where the vertical axis pump is installed, and a pump casing portion of the vertical axis pump is supported and fixed to a floor frame of the equipment room building. Arrange the piping side of the pump in the equipment room,
A pump facility of a nuclear power plant, wherein the pump body side is divided by the building floor frame so as to be disposed in the maintenance room. 5. A plurality of pump chambers adjacent to each other at least two in a building body, a maintenance area is provided in front of the plurality of pump chambers, and a shielding curtain used by the plurality of pump chambers is provided in the maintenance area. Pump equipment for a nuclear power plant, which is provided. 6. A pump room having an entrance and exit is provided in a building body, a maintenance area for maintaining a pump is provided in the pump room, and a shield door having a mechanism capable of sliding in a lateral direction is installed in the maintenance area. Pump equipment for a nuclear power plant. 7. A pump body of a vertical axis pump and a casing, a support, a stand, and a pump attached to the pump in a pump room of a building in which a vertical axis pump supported from a ceiling or a wall of the building via a steel material is installed. , Discharge pipes and valves, equipment buried in the skeleton, and other equipment are preliminarily attached to the driving form to form an integrated structure, and this integrated structure is directly suspended at a predetermined position on the construction site to raise the ceiling of the pump room. A pumping facility for a nuclear power plant, comprising: 8. A pump room of a building, in which a vertical axis pump supported from a ceiling or a wall of the building via a steel material is installed, not only a pump body of the vertical axis pump and a device associated with the pump, but also other devices. A large block structure as a unit of a floor, a wall, a room, etc. using a driving formwork, a reinforcing material, and other steel materials, and the large block structure is directly suspended at a predetermined position on a construction site, and the pump is used. Pumping equipment for a nuclear power plant, characterized by constituting a ceiling of a room. 9. A plurality of bolts attached to a pump casing of a longitudinal axis pump, a shielding lid inserted and attached to the bolts, a hinge attached to the shielding lid and movable in a plane direction, and a hinge. A pumping facility for a nuclear power plant, comprising: a mounting base with a ball screw capable of mounting and vertically moving. 10. A frame for fixedly supporting a motor, an impeller, and the like drawn vertically from a pump body of a vertical axis pump;
A nuclear power plant comprising: a bogie having a moving wheel or the like added to the frame; a supporting and rotating mechanism for supporting and rotating the motor and the impeller in a vertical plane; and a fixing mechanism for fixing the rotational position. Maintenance equipment for pumping equipment at power plants. 11. The maintenance equipment for pump equipment of a nuclear power plant according to claim 10, wherein a dolly fixing mechanism is provided at a lower portion of said dolly. 12. A plurality of pulleys are attached to a wall of a pump chamber in which a vertical axis pump is installed, and a rope is hooked on the pulleys.
Attach this rope to the bogie on which the vertical axis pump is mounted,
A maintenance facility for a pump facility of a nuclear power plant, wherein the carriage is run by moving the rope. 13. The truck according to claim 12, wherein a guide rail is laid on the floor of the pump chamber, and a guide rail coupling mechanism for running the truck along the guide rail is provided on the truck. Maintenance equipment for the pump equipment of the nuclear power plant described. 14. A pump for a nuclear power plant according to claim 12, wherein a rail is laid on the floor of said pump room, and a rail connection mechanism for running on said rail is provided on said bogie. Equipment maintenance equipment.