JP2015152152A - Equipment support structure and equipment support method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety in plant arrangement.SOLUTION: An equipment support structure comprises: a substrate 101 on which equipment 52 connected to plant arrangement is supported; a seismic isolator 110 provided between a floor G and the substrate 101; a fixed base 2 fixed to the floor G and arranged around the substrate 101; and a fixing device 1 including a contact part 3, attached to one of the substrate 101 and the fixed base 2, provided to be movable forward or backward with respect to the other, restricting movement of the substrate 101 by the seismic isolator 110 when the fixing device 1 moves forward, and allowing the movement of the substrate 101 by the seismic isolator 110 when the fixing device 1 moves backward.

Description

  The present invention relates to a support structure for a device.

  As a plant facility, for example, a nuclear power plant having a pressurized water reactor uses light water as a reactor coolant and a neutron moderator to produce high-temperature and high-pressure water that does not boil throughout the reactor core. It is sent to a generator to generate steam by heat exchange, and this steam is sent to a turbine generator to generate electricity. And a steam generator transmits the heat | fever of the high temperature / high pressure primary cooling water from a nuclear reactor to secondary cooling water, and generates water vapor | steam with secondary cooling water.

  In such a nuclear power plant, when a tsunami or earthquake occurs, the cooling function of seawater is lost and all AC power is lost. The system, that is, the reactor is cooled, and the main steam relief valve is opened to cool the secondary system by reducing the pressure in the secondary system. During this time, the AC power supply is restored.

  By the way, in the nuclear power plant, the reactor containment vessel has a seismic isolation structure, thereby suppressing the shaking against the earthquake and improving the safety. Examples of the seismic isolation structure of the reactor containment vessel include those described in Patent Documents 1 and 2.

JP 2012-047662 A Japanese Patent No. 2978732

  In the conventional nuclear power plant described above, the safety is improved by the cooling water supplied by the auxiliary feed water pump, but further improvement in safety is desired.

  This invention solves the subject mentioned above, and it aims at providing the support structure and the support method of the apparatus which can improve the safety | security in plant equipment.

  In order to achieve the above-described object, the equipment support structure of the present invention includes a board on which equipment connected to plant equipment is supported, a seismic isolation device provided between a floor side and the board, and the floor. A fixed base that is fixed to the side and arranged around the substrate, and is attached to one of the substrate side or the fixed base side so as to be movable back and forth with respect to the other. And a fixing device having a contact portion that allows movement of the substrate by the seismic isolation device during retraction while restricting movement.

  According to this device support structure, when the device is not used, the substrate can be supported by the seismic isolation device so that the vibration can be attenuated by the seismic isolation device even if an earthquake occurs. On the other hand, when the device is used, by fixing the substrate with the fixing device, the movement of the substrate by the seismic isolation device is regulated by the fixing device, so that the device can be operated appropriately. In particular, in the fixing device, the movement of the substrate can be regulated by moving the abutting portion installed in advance, so that the installation work can be easily performed as compared to installing a new fixing device. As a result, equipment can be installed quickly, and the safety of plant equipment that requires equipment can be improved.

  In the device support structure according to the present invention, the contact portion may be a hydraulic jack that moves the rod forward and backward by hydraulic pressure, and abuts the tip portion of the rod that has advanced.

  According to the support structure of this device, since the contact portion is configured to contact the tip of the rod that has advanced as a hydraulic jack, the movement of the substrate can be regulated quickly, so that the device can be installed more quickly. It is possible to improve the safety of plant facilities that require equipment.

  In the support structure for a device according to the present invention, the abutting portion is composed of a hydraulic jack that moves the rod forward and backward by hydraulic pressure, abuts the tip of the rod that has advanced, and holds the rod advancing position. It has a holding mechanism.

  According to the support structure of this device, since the contact portion is configured to contact the tip of the rod that has advanced as a hydraulic jack, the movement of the substrate can be regulated quickly, so that the device can be installed more quickly. It is possible to improve the safety of plant facilities that require equipment. In addition, by holding the rod advance position by the holding mechanism, it is possible to maintain the regulation of the movement of the substrate even if the pressurization of the hydraulic oil to the hydraulic jack is stopped.

  In the apparatus support structure of the present invention, the holding mechanism has a nut that is screwed to the rod and is movable in the length direction of the rod, and the nut contacts the casing of the hydraulic jack. The advancing position of the rod is maintained by contact.

  According to the support structure of this device, it is possible to obtain a mechanism that maintains the restriction on the movement of the substrate even when the pressurization of the hydraulic oil to the hydraulic jack is stopped. Moreover, by moving the nut in the length direction of the rod, even if the advance length of the rod changes, the advance position of the rod can be held according to the change.

  In the device support structure of the present invention, the device is a pipe connection device configured to be connectable to a plant facility through a connection pipe.

  As for the arrangement of the pipe connecting device, it is required to connect with the connecting pipe. Therefore, it is preferable to secure the accurate position of the pipe coupling device by fixing the movement of the substrate on which the device is mounted with the fixing device when using the pipe coupling device, and this fixing work is easily performed. Thus, since the pipe connection device can be quickly applied to the plant equipment, the safety in the plant equipment can be improved.

  In order to achieve the above-mentioned object, a device supporting method of the present invention includes a substrate on which a device connected to a plant facility is supported, a seismic isolation device provided between a floor side and the substrate, and the floor. A fixed base that is fixed to the side and arranged around the substrate, and is attached to one of the substrate side or the fixed base side so as to be movable back and forth with respect to the other. A fixing device having a contact portion that restricts movement and allows movement of the substrate by the seismic isolation device during retraction, and a device support method using a support structure, the contact portion being A step of moving the substrate so that the device becomes a reference position connected to the plant facility by advancing, and a step of holding the advancing position of the contact portion so as to hold the reference position. With features including That.

  According to this device supporting method, the device can be easily returned to the reference position, and the device can be quickly applied to the plant facility. Therefore, safety can be improved in the plant facility.

  According to the present invention, it is possible to improve safety in plant equipment.

FIG. 1 is a schematic configuration diagram of an example of plant equipment. FIG. 2 is a side view of an example of a device support structure and a device according to an embodiment of the present invention. FIG. 3 is a plan view of an example of a device support structure and a device according to an embodiment of the present invention. FIG. 4 is a side view showing a fixed state of the device by the device support structure according to the embodiment of the present invention. FIG. 5 is a plan view showing a fixed state of the device by the device support structure according to the embodiment of the present invention. FIG. 6 is a configuration diagram of the fixing device. FIG. 7 is a plan view illustrating a method for supporting a device according to an embodiment of the present invention. FIG. 8 is a plan view showing a device support method according to the embodiment of the present invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a schematic configuration diagram of an example of plant equipment. FIG. 1 shows a nuclear power plant 10 as an example of plant equipment. The plant equipment is not limited to this nuclear power plant. In the nuclear power plant 10 shown in FIG. 1, the nuclear reactor uses light water as a reactor coolant and a neutron moderator to form high-temperature and high-pressure water that does not boil over the entire core, and sends this high-temperature and high-pressure water to a steam generator to generate heat. This is a pressurized water reactor (PWR) that generates steam by exchange and sends the steam to a turbine generator to generate electricity.

  In a nuclear power plant 10 having a pressurized water reactor, as shown in FIG. 1, the reactor containment vessel 11 stores a pressurized water reactor 12 and a steam generator 13 therein. The pressurized water reactor 12 and the steam generator 13 are connected via pipes 14 and 15, a pressurizer 16 is provided on the pipe 14, and a primary cooling water pump 17 is provided on the pipe 15. In this case, light water is used as the moderator and primary cooling water (cooling material), and the primary cooling system is controlled by the pressurizer 16 to maintain a high pressure state in order to suppress boiling of the primary cooling water in the core. Yes. Accordingly, in the pressurized water reactor 12, light water is heated as primary cooling water by the fuel (nuclear fuel), and the steam generator 13 is passed through the pipe 14 in a state where the high temperature primary cooling water is maintained at a predetermined high pressure by the pressurizer 16. Sent to. In the steam generator 13, heat exchange is performed between the high-temperature and high-pressure primary cooling water and the secondary cooling water, and the cooled primary cooling water is returned to the pressurized water reactor 12 through the pipe 15.

  The steam generator 13 is connected to a steam turbine 19 through a pipe 18, and a main steam isolation valve 20 is provided in the pipe 18. The steam turbine 19 includes a high-pressure turbine 21 and a low-pressure turbine 22, and a generator (power generation device) 23 is connected to the steam turbine 19. Further, a moisture separator / heater 24 is provided between the high-pressure turbine 21 and the low-pressure turbine 22, and a cooling water branch pipe 25 branched from the pipe 18 is connected to the moisture separator / heater 24, The high pressure turbine 21 and the moisture separation heater 24 are connected by a low temperature reheat pipe 26, and the moisture separation heater 24 and the low pressure turbine 22 are connected by a high temperature reheat pipe 27.

  Furthermore, the low pressure turbine 22 of the steam turbine 19 has a condenser 28, and the condenser 28 is connected to a turbine bypass pipe 30 having a bypass valve 29 from the pipe 18, and cooling water (for example, , Seawater) is connected to a water intake pipe 31 and a drain pipe 32. This intake pipe 31 has a circulating water pump 33, and the other end portion thereof is disposed as a heat reservoir together with the drain pipe 32, for example, in the sea.

  The condenser 28 is connected to a pipe 34, and is connected to a condensate pump 35, a ground condenser 36, a condensate demineralizer 37, a condensate booster pump 38, and a low-pressure feed water heater 39. The pipe 34 is connected to a deaerator 40 and is provided with a main feed water pump 41, a high-pressure feed water heater 42, and a main feed water control valve 43.

  The pipe 18 is connected to one end of a main steam relief pipe 45 having a main steam relief valve 44 and one end of a main steam safety pipe 47 having a main steam safety valve 46. The end is open to the atmosphere. On the other hand, in the pipe 34, one end of an auxiliary water supply pipe 48 is connected between the main water supply control valve 43 and the steam generator 13. The auxiliary water supply pipe 48 is provided with a first auxiliary water supply pump 49. The condensate tank 50 is connected to the other end. The first auxiliary feed water pump 49 is driven by the rotation of the turbine by steam, and the main steam branch pipe 51 branched from the main steam safety pipe 47 and the main steam isolation valve 20 in the pipe 18 is the first. 1 is extended to the auxiliary water supply pump 49, and the main steam branch pipe 51 is provided with an on-off valve 51 a.

  Accordingly, the steam generated by exchanging heat with the high-temperature and high-pressure primary cooling water in the steam generator 13 is sent to the steam turbine 19 (the high-pressure turbine 21 to the low-pressure turbine 22) through the pipe 18, and the steam is generated by the steam. The turbine 19 is driven to generate power by the generator 23. At this time, the steam from the steam generator 13 drives the high-pressure turbine 21, then the moisture contained in the steam is removed and heated by the moisture separator / heater 24, and then the low-pressure turbine 22 is driven. Then, the steam that has driven the steam turbine 19 is cooled using seawater in the condenser 28 to become condensate, and the condensate pump 35, the ground condenser 36, the condensate demineralizer 37, the condensate booster pump 38, the low pressure The water is returned to the steam generator 13 through a feed water heater 39, a deaerator 40, a main feed water pump 41, a high pressure feed water heater 42, and the like.

  The various pumps 17, 33, 35, 38, 41, etc. described above are driven by power supplied from a regular power supply device (in-plant AC power supply and external power supply, both not shown). When these functions are lost, they cannot be driven to circulate the cooling water, and it becomes difficult to cool the pressurized water reactor 12 and the steam generator 13.

  Therefore, when the power supply is lost, the steam (secondary cooling water) of the steam generator 13 is released from the pipe 18 to the atmosphere through the main steam relief pipe 45 or the main steam safety pipe 47 by opening the main steam relief valve 44 or the like. Then, the pressure in the steam generator 13 is reduced to cool. Further, by supplying the steam in the pipe 18 from the main steam branch pipe 51 to the first auxiliary water supply pump 49, the first auxiliary water supply pump 49 is driven, and the condensate in the condensate tank 50 is supplied from the auxiliary water supply pipe 48. The steam generator 13 is supplied through a pipe 34 to cool the steam generator 13. During this time, the power supply device is restored.

  Thus, in the nuclear power plant 10, the safety system when the power supply device is lost is constructed. On the other hand, further improvement in safety is required. Therefore, in the nuclear power plant 10 shown in FIG. 1, a second auxiliary feed water pump 52 as a device in the present embodiment is provided in parallel with the first auxiliary feed water pump 49. The second auxiliary water supply pump 52 is provided with branch water supply pipes (connection pipes) 53 each having an end connected to the auxiliary water supply pipe 48 so as to bypass the first auxiliary water supply pump 49. Is provided. The second auxiliary feed pump 52 is arranged for use as an emergency when either one cannot operate together with the first auxiliary feed pump 49. The device is not limited to the second auxiliary water supply pump 52, but may be a mechanical device such as an emergency generator or an electric device such as an auxiliary power source or a control panel in addition to the pump.

  FIG. 2 is a side view of an example of a device support structure and device according to the present embodiment, FIG. 3 is a plan view of an example of a device support structure and device according to the present embodiment, and FIG. FIG. 5 is a side view showing a fixed state of the device by the support structure of the device according to the present embodiment, and FIG. 5 is a plan view showing a fixed state of the device by the support structure of the device according to the present embodiment.

  The second auxiliary water supply pump 52 is applied as a pipe coupling device. The pipe coupling device is connected to the plant equipment through the pipe.

  The second auxiliary water supply pump 52 is provided on the substrate 101 as shown in FIGS. 2 and 3. The substrate 101 is a flat plate having a rectangular shape and a predetermined thickness. The second auxiliary water supply pump 52 includes a water supply pump 54 and an electric motor 55, and is connected to a drive shaft 54 a of the water supply pump 54, an output shaft 55 a of the electric motor 55, and a connection shaft 56 so as to be integrally rotatable. And the upper frame 102 which makes frame shape is being fixed to the upper surface part of the board | substrate 101. As shown in FIG. A water supply pump 54 is supported on the upper frame 102 via a bracket 103, and an electric motor 55 is supported via a bracket 104. The feed pump 54 is provided with a connection flange 57 serving as a suction portion and a connection flange 58 serving as a discharge portion.

  As shown in FIGS. 4 and 5, in the second auxiliary water supply pump 52, the branch water supply pipe 53 is connected to the connection flange 57 and the connection flange 58 in use. That is, the branch water supply pipe 53 is composed of a first pipe 61 on the water supply side and a second pipe 62 on the drain side, and the connection flange 61 a of the first pipe 61 and the connection flange 57 of the water supply pump 54 are connected by the bolt 63. At the same time, the connection flange 62 a of the second pipe 62 and the connection flange 58 of the water supply pump 54 are connected by a bolt 64. On the other hand, as shown in FIGS. 2 and 3, the second auxiliary water supply pump 52 has the branch water supply pipe 53 removed when not in use. That is, as shown in FIG. 2, the connection flange 61a of the first pipe 61 and the connection flange 57 of the water supply pump 54 are removed, and the connection flange 62a of the second pipe 62 and the connection flange 58 of the water supply pump 54 are removed. Removed.

  The second auxiliary water supply pump 52 has a seismic isolation device 110. The seismic isolation device 110 is provided between the fixed plate 111 attached to the support plate 106 fixed to the floor G side and the substrate 101 that supports the second auxiliary water supply pump 52, and from the floor G side. The horizontal vibration transmitted to the second auxiliary feed water pump 52 is attenuated. The structure of the seismic isolation device 110 is generally known, and various types can be applied. The second auxiliary water supply pump 52 is supported by the seismic isolation device 110 so as to be movable independently from the branch water supply pipe 53 by the seismic isolation device 110 when not in use as shown in FIGS. 2 and 3. As described above, the substrate 101 that supports the second auxiliary water supply pump 52 can attenuate the horizontal vibration generated by the earthquake by the seismic isolation device 110. The floor G forms a concrete surface of a reinforced concrete structure.

  On the other hand, when using the 2nd auxiliary | assistant water supply pump 52, as shown in FIG. 4 and FIG. For this reason, it is necessary to fix the board | substrate 101 so that it may not move with respect to the branch water supply piping (connection piping) 53. FIG. Therefore, in this embodiment, the fixing device 1 capable of fixing the substrate 101 is attached to the support plate 106 attached to the floor G. Although the details will be described later, a plurality of the fixing devices 1 are provided around the substrate 101 at the reference position where the second auxiliary water supply pump 52 is connected to the branch water supply piping (connection piping) 53, and the seismic isolation device 110 is provided. The reference position of the substrate 101 is held by restricting the movement of the substrate 101.

  Thus, the second auxiliary water supply pump 52 as a device in the present embodiment supports the substrate 101 by the seismic isolation device 110 when not in use, and fixes the substrate 101 when the second auxiliary water supply pump 52 is used. 1 is fixed. That is, during normal operation of the nuclear power plant 10, the substrate 101 that supports the second auxiliary water supply pump 52 can attenuate the vibration by the seismic isolation device 110 even if an earthquake occurs. In the emergency operation of the nuclear power plant 10, the substrate 101 that supports the second auxiliary water supply pump 52 is restricted by the fixing device 1 from moving the substrate 101 by the seismic isolation device 110. Can operate properly.

  FIG. 6 is a configuration diagram of the fixing device. As described above, a plurality of fixing devices 1 are provided around the substrate 101 and hold the reference position of the substrate 101 by restricting the movement of the substrate 101 by the seismic isolation device 110. As shown in FIGS. 2 to 5, the fixing device 1 includes a fixing base 2 and a contact portion 3. The fixed base 2 is fixed to a support plate 106 fixed to the floor G, and a plurality of fixed bases 2 are arranged around the substrate 101. The periphery of the substrate 101 is a position wider than the maximum movement range of the substrate 101 by the seismic isolation device 110. Specifically, the support plate 106 is formed in a rectangular shape in plan view, and two fixed bases 2 are arranged corresponding to each side of the support plate 106. And the fixed stand 2 is arrange | positioned with the flat contact surface 2a toward the board | substrate 101 side. The fixed base 2 may be formed in a wall shape surrounding the substrate 101 instead of a plurality, and the flat inner wall surface thereof may be arranged as the contact surface 2a toward the substrate 101 side.

  A plurality of the abutting portions 3 are attached to the substrate 101 and provided in a plurality so as to be capable of moving forward and backward toward the abutting surface 2a of each fixed base 2. Specifically, the contact portion 3 is configured as a jack. As the jack, there are a hydraulic jack, a hydraulic jack, a pneumatic jack, and the like. In this embodiment, the most preferable hydraulic jack is applied. As shown in FIGS. 5 and 6, the contact portion 3 configured as a hydraulic jack moves forward and backward so that the casing 3 a to which hydraulic oil is supplied and the pressure of the hydraulic oil is immersed in or protrudes from the casing 3 a. The rod 3b has a contact 3c that is provided at the protruding end of the rod 3b and contacts the contact surface 2a of the fixed base 2.

  The contact portion 3 further includes a holding mechanism that holds the protruding state of the rod 3b. As shown in FIG. 6, in the holding mechanism, the rod 3b is formed with a male screw, and has a nut 3d screwed into the rod 3b. The nut 3d is screwed into the rod 3b so as to be movable in the length direction that is the forward and backward movement direction of the rod 3b. The nut 3d moves forward and backward with the rod 3b as shown in FIGS. 6 (a) and 6 (b), and abuts against the casing 3a as shown in FIG. 6 (c) to maintain the advanced position of the rod 3b. can do. That is, when the rod 3b is advanced, it is necessary to apply pressure to the hydraulic oil, but by holding the advanced position of the rod 3b with the nut 3d, the rod 3b is advanced without applying pressure to the hydraulic oil. Can remain. The holding mechanism is not limited to the above configuration. For example, although not clearly shown in the drawing, a configuration may be adopted in which a groove is formed in the rod 3b and a claw member fitted into the groove is provided in the casing 3a. In this case, if the claw member is pressed against the groove side by an urging member such as a spring, and the rod 3b is automatically fitted into the groove when moved to the advanced position, the workability is further improved.

  Note that the abutting portion 3 configured as a hydraulic jack has a pipe (not shown) supplied with hydraulic oil connected to the casing 3a. The piping is connected to a pressurizing pump (not shown) that applies pressure to the hydraulic oil. The pressure pump may be an electric pump, but is preferably a manual pump that does not require a power source.

  As shown in FIGS. 4 and 5, each abutment portion 3 moves the rod 3 b to advance so that the abutment 3 c abuts against the abutment surface 2 a of each fixed base 2, thereby providing a seismic isolation device. The movement of the substrate 101 by 110 can be restricted, and the reference position of the substrate 101 can be held.

  Although not clearly shown in the drawing, the contact portion 3 may be attached to the fixed base 2 and provided so as to be movable forward and backward. In this case, each abutment portion 3 moves the rod 3b to move forward and abuts the abutment 3c against the substrate 101, thereby restricting the movement of the substrate 101 by the seismic isolation device 110 and setting the reference position of the substrate 101. Can be held.

  As described above, the device support structure of the present embodiment includes the substrate 101 on which the device (second auxiliary feed pump 52) connected to the plant facility (the nuclear power plant 10) is supported, the floor G side, and the substrate 101. The seismic isolation device 110 provided between the fixed base 2 and the fixed base 2 fixed on the floor G side and arranged around the base plate 101, and attached to one of the base plate 101 side or the fixed base 2 side and moved forward and backward And a fixing device 1 having a contact portion 3 that restricts the movement of the substrate 101 by the seismic isolation device 110 during advancement and permits the movement of the substrate 101 by the seismic isolation device 110 during retraction.

  According to this device support structure, when the second auxiliary water pump 52 as a device is not used, the base plate 101 is supported by the seismic isolation device 110 so that the seismic isolation device 110 can vibrate even if an earthquake occurs. Can be attenuated. On the other hand, when the second auxiliary water supply pump 52 is used, the movement of the substrate 101 by the seismic isolation device 110 is regulated by the fixing device 1 by fixing the substrate 101 by the fixing device 1. 52 can operate properly. In particular, in the fixing device 1, the movement of the substrate 101 can be regulated by moving the abutting portion 3 installed in advance, so that the installation work can be easily performed as compared with newly installing the fixing device. Can do. As a result, equipment can be installed quickly, and the safety of the nuclear power plant 10 that requires equipment can be improved.

  Further, in the device support structure of the present embodiment, the abutting portion 3 is a hydraulic jack that moves the rod 3b forward and backward by hydraulic pressure, and abuts the tip of the rod 3b that has advanced.

  According to this device support structure, since the contact portion 3 is configured to contact the tip of the rod 3b that has advanced as a hydraulic jack, the movement of the substrate 101 can be quickly regulated, so that the device can be installed. This can be performed more quickly, and the safety of the nuclear power plant 10 that requires equipment can be further improved.

  Further, in the device support structure of the present embodiment, the abutting portion 3 is composed of a hydraulic jack that moves the rod 3b forward and backward by hydraulic pressure, abuts the tip of the advancing rod, and holds the advancing position of the rod 3b. Holding mechanism.

  According to the support structure of this device, by holding the advance position of the rod 3b by the holding mechanism, it is possible to maintain the restriction on the movement of the substrate 101 even when the pressurization of the hydraulic oil to the hydraulic jack is stopped.

  In the device support structure of the present embodiment, the holding mechanism has a nut 3d that is screwed into the rod 3b so as to be movable in the length direction of the rod 3b, and the nut 3d is a casing of the hydraulic jack. The advancing position of the rod 3b is held by coming into contact with 3a.

  According to the support structure of this device, it is possible to obtain a mechanism that maintains the restriction of the movement of the substrate 101 even when the pressurization of the hydraulic oil to the hydraulic jack is stopped. Moreover, by moving the nut 3d in the length direction of the rod 3b, even if the advance length of the rod 3b changes, the advance position of the rod 3b can be held according to the change.

  In the device support structure of the present embodiment, the device is a pipe coupling device configured to be connectable to the plant facility (the nuclear power plant 10) through the connection pipe 53.

  As for the arrangement of the pipe connecting device, the connection with the connection pipe 53 is required. Therefore, fixing the movement of the substrate 101 to which the device is attached when using the pipe connecting device by the fixing device 1 is preferable in securing the accurate position of the pipe connecting device, and this fixing work is facilitated. By doing so, it is possible to quickly apply the pipe connection device to the plant equipment, so that safety can be improved in the plant equipment.

  7 and 8 are plan views showing a method of supporting the device according to the present embodiment.

  By the way, even if an earthquake occurs, the seismic isolation device 110 can attenuate the vibration by the seismic isolation device 110, but when the earthquake subsides, as shown in FIG. ) May deviate from the reference position connected to the plant equipment (the branch water supply pipe (connection pipe) 53 of the nuclear power plant 10). In such a case, in the present embodiment, the device can be returned to the reference position by the advance movement of the contact portion 3 of the fixing device 1.

Specifically, as shown in FIG. 8, the substrate 101 is moved so that the abutting portion 3 is advanced to a reference position where the device is connected to the plant facility. After that, as shown in FIG.
The advancing position of the contact portion 3 is held so as to hold the reference position.

  By doing in this way, since an apparatus can be easily returned to a reference position and an apparatus can be applied to plant equipment quickly, safety can be improved in plant equipment.

  In FIG. 8, the contact portion 3 on the side closer to the substrate 101 is moved forward. In this manner, at least the contact portion 3 may be moved forward to move the device to the reference position, but all the contact portions 3 may be moved forward.

DESCRIPTION OF SYMBOLS 1 Fixing device 2 Fixing base 2a Contact surface 3 Contact part 3a Casing 3b Rod 3c Contact 3d Nut 10 Nuclear power plant (plant equipment)
52 Second auxiliary feed pump (Piping equipment: equipment)
53 Branch water supply piping (connection piping)
101 Substrate 110 Seismic isolation device G Floor

Claims (6)

A substrate on which equipment connected to the plant equipment is supported;
A seismic isolation device provided between the floor and the substrate;
A fixed base fixed to the floor side and disposed around the substrate, and attached to one of the substrate side or the fixed base side so as to be movable back and forth with respect to the other. A fixing device having a contact portion that allows movement of the substrate by the seismic isolation device during retraction while restricting movement of the substrate;
A support structure for a device, comprising:   The device support structure according to claim 1, wherein the contact portion includes a hydraulic jack that moves the rod forward and backward by hydraulic pressure, and abuts the tip portion of the rod that has advanced.   The contact portion is composed of a hydraulic jack that moves the rod forward and backward by hydraulic pressure, and has a holding mechanism that makes contact with the tip portion of the rod that has advanced and holds the advance position of the rod. The support structure of the apparatus of 1.   The holding mechanism includes a nut that is screwed to the rod so as to be movable in the length direction of the rod, and holds the advance position of the rod by contacting the casing of the hydraulic jack. The apparatus support structure according to claim 3.   The equipment support structure according to any one of claims 1 to 4, wherein the equipment is a pipe connection equipment configured to be connectable to a plant facility through a connection pipe. A substrate on which equipment connected to the plant equipment is supported;
A seismic isolation device provided between the floor and the substrate;
A fixed base fixed to the floor side and disposed around the substrate, and attached to one of the substrate side or the fixed base side so as to be movable back and forth with respect to the other. A fixing device having a contact portion that restricts the movement of the substrate while allowing the movement of the substrate by the seismic isolation device during retraction;
A device support method using a support structure comprising:
Moving the substrate so that the device becomes a reference position connected to the plant facility by advancing the contact portion;
Holding the advancing position of the contact portion so as to hold the reference position;
A method for supporting a device comprising the steps of:

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