JP2017072270A - Circulating water system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water from leaking into a turbine building till breaking off the connection of a circulating water system from a water source even when an extension joint for a gateway port of a condenser water chamber is damaged due to an impact from an earthquake in the circulating water system.SOLUTION: The circulating water system includes: connection piping 182 of the water chamber; drain piping 21 for transporting circulating water; a drain outlet valve 20 connected to the drain piping 21; a drain-side extension joint 19 connected to the drain outlet valve 20 and the connection piping 182; and a leakage water storage part 31 provided so as to be capable of storing leakage water from the drain-side extension joint 19.SELECTED DRAWING: Figure 3

Description

  The embodiment as one aspect of the present invention relates to a circulating water system.

  In a conventional turbine building of a nuclear power plant or the like, after the turbine is rotationally driven by steam generated in the nuclear reactor, the steam is cooled by a condenser and is supplied to the nuclear reactor again as water. The condenser is supplied with water such as seawater (circulated water) as a cooling source for steam.

  During circulation of circulating water in the circulating water system, it is assumed that expansion joints (expansion joints) with weak strength at the inlet / outlet of the condenser water chamber are damaged due to earthquakes and the like. When the expansion joint is damaged, the circulating water in the circulating water system leaks from the damaged portion into the turbine building.

  If the expansion joint is damaged, close the water chamber inlet / outlet valve connected to the expansion joint, or activate the siphon break (air inflow) installed in the circulation pipe, There is a technology to cut the edge.

JP 2014-228148 A

  According to the prior art, during circulation of circulating water in the circulating water system, the siphon break occurs after the expansion joint is detected until the water chamber inlet / outlet valve is closed, or after the expansion joint is detected. Until it is activated, the circulating water leaks from the damaged portion of the expansion joint into the turbine building (outside the system).

  In addition, when the expansion joint is damaged and the siphon break itself does not operate due to the influence of an earthquake, tsunami, or the like, it is impossible to cut the edge between the circulating water system using the siphon break and the water source. In that case, the water chamber inlet / outlet valve is closed to cut off the edge of the circulating water system and the water source, but if the water chamber inlet / outlet valve loses its closing function due to deformation of the expansion joint, water leakage from the damaged part will occur. It is assumed that the turbine building overflows.

  Even if the expansion joint at the entrance / exit of the condenser water chamber is damaged due to the influence of an earthquake or the like, the circulating water system according to the present embodiment is connected from the expansion joint to the turbine building until the circulation water system and the water source are cut off. The problem is to prevent water leakage indoors.

  In addition, the circulating water system according to the present embodiment has an overflow of the turbine building due to water leakage from the expansion joint even when the expansion of the condenser water chamber is damaged due to the earthquake and the siphon break is not activated. It is an object to prevent this.

  In order to solve the above-described problems, the circulating water system according to the present embodiment includes a condenser water chamber, piping for transporting circulating water, a valve connected to the piping, the valve, and the water chamber. And an expansion joint connected to the expansion joint, and a water leakage accommodating portion provided to accommodate leakage from the expansion joint.

  According to the circulating water system according to the present embodiment, even if the expansion joint is damaged due to an earthquake or the like, it is possible to prevent water leakage into the turbine building until the circulating water system and the water source are cut off. .

  In addition, according to the circulating water system according to the present embodiment, even when the expansion joint is deformed, the valve body closing function can be reliably maintained, so that the expansion joint is damaged due to an earthquake or the like, and the siphon break is not activated. However, it is possible to prevent overflow of the turbine building due to water leakage from the expansion joint.

Schematic which shows the circulating water system which concerns on 1st-6th embodiment. The side view which shows the structure of the circulating water system which concerns on 1st Embodiment. The figure which shows the detailed structure of the circulating water system which concerns on 1st Embodiment. The figure which shows the detailed structure of the circulating water system which concerns on 1st Embodiment. The figure which shows the detailed structure of the circulating water system which concerns on 1st Embodiment. The figure which shows the detailed structure of the circulating water system which concerns on 2nd Embodiment. The figure which shows the detailed structure of the circulating water system which concerns on 3rd Embodiment. The figure which shows the detailed structure of the circulating water system which concerns on 4th Embodiment. The figure which shows the detailed structure of the circulating water system which concerns on 5th Embodiment. (A), (B) is the schematic which shows the structure of the water chamber of the circulating water system which concerns on 6th Embodiment. The figure which shows the detailed structure of the circulating water system which concerns on 6th Embodiment.

  The circulating water system according to the present embodiment will be described with reference to the accompanying drawings.

(First embodiment)
FIG. 1 is a schematic diagram showing a circulating water system according to the first embodiment.

  FIG. 1 shows a circulating water system 1 according to the first embodiment. The circulating water system 1 mainly includes a water intake pit 11, a water intake pump (CWP) 12, a water intake pump discharge valve 13, a water intake pipe 14, a turbine building 15, a water intake inlet valve 16, a water intake side expansion joint (expansion joint) 17, A water device 18, a drain side expansion joint (expansion joint) 19, a drain outlet valve 20, a drain pipe 21, a water discharge port 22, a siphon break 23, and a water leakage accommodating portion 31 (shown in FIGS. 2 to 5) are provided.

  Circulation piping (pipings 14 and 21) conveys circulating water between the open ocean S and the condenser 18.

  The intake side expansion joint 17 is connected between the intake inlet valve 16 and the condenser 18 in order to absorb a shift in relative displacement between the intake inlet valve 16 and the condenser 18. Similarly, the drain side expansion joint 19 is connected between the condenser 18 and the drain outlet valve 20 in order to absorb the displacement of the relative displacement between the condenser 18 and the drain outlet valve 20.

  Seawater taken from the open ocean S is taken into the intake pit 11 as circulating water. The circulating water pumped up by the intake pump 12 is guided into the turbine building 15 through the intake pump discharge valve 13 and the intake pipe 14 in this order, and sequentially passes through the intake pipe 14, the intake inlet valve 16, and the intake side expansion joint 17. And supplied to the condenser 18. The circulating water supplied to the condenser 18 cools (heat exchanges) the steam in the condenser 18, and then passes through the drain-side expansion joint 19, the drain outlet valve 20, and the drain pipe 21 in this order outside the turbine building 15. To the water discharge pit (not shown). Drainage from the discharge pit is discharged from the discharge port 22 to the open ocean S.

  The siphon break 23 is installed at a location higher than the sea level in both the intake pipe 14 and the drain pipe 21. In the circulating water system 1, it is assumed that the seawater is supplied from the open ocean S to the condenser 18 and drained from the condenser 18, and an emergency occurs. In that case, the air is taken in by opening the siphon break 23, and the pipe on the turbine building 15 side and the pipe on the open ocean side of the intake pipe 14 and the drain pipe 21 are separated from each other, so that seawater is contained in the turbine building 15. Inflow is suppressed.

  FIG. 2 is a side view showing the structure of the circulating water system 1 according to the first embodiment.

  FIG. 2 shows an expansion joint installed in the turbine building 15. The circulating water system 1 according to the first embodiment (the same applies to the second to sixth embodiments) includes an intake side expansion joint 17 and a drain side expansion joint 19 shown in FIG. 1 as expansion joints. Here, the drain side expansion joint 19 will be described as an example, but the same applies to the water intake side expansion joint 17.

  The body of the condenser 18 is placed on the foundation G of the foundation (ground). The condenser 18 includes a water chamber 181, a connection pipe 182, and a support 183 (shown in FIGS. 3 to 5).

  The drain side expansion joint 19 has an upper (upstream) side fixed to the connection pipe 182 and a lower (downstream) side fixed to the drain outlet valve 20. The drain-side expansion joint 19 is a member that absorbs a shift in relative displacement between the condenser 18 and the drain pipe 21.

  The drain outlet valve 20 has an upper side fixed to the drain side expansion joint 19 and a lower side fixed to the drain pipe 21. The drain outlet valve 20 is a valve that becomes a boundary that cuts off the circulating water system 1 (condenser 18) and the water source.

  The water leakage accommodating portion 31 is provided so as to accommodate the water leakage from the drain side expansion joint 19. The material used as the water leakage accommodating portion 31 may be the same as that of the drainage pipe 21, and is, for example, carbon steel, cast iron, resin-coated steel, galvanized steel, or copper alloy.

  3-5 is a figure which shows the detailed structure of the circulating water system | strain 1 which concerns on 1st Embodiment. FIG. 3 is a side sectional view including the structure of the water leakage accommodating portion 31. 4 and 5 are upper cross-sectional views showing the structure of the water leakage accommodating portion 31. FIG.

  FIG. 3 shows the circulating water system 1 according to the first embodiment. The circulating water system 1 shown in FIG. 3 includes a condenser (connection pipe 182 and support 183), a drain-side expansion joint 19, a drain outlet valve 20, a drain pipe 21, and a water leakage accommodating portion 31. The drain outlet valve 20 includes a valve body 201 and a valve drive motor 202 that is opening / closing power of the valve body 201 and is watertight.

  The support body 183 is fixed to the outer peripheral side surface of the connection pipe 182. For example, the support body 183 is fixed to the connection pipe 182 by welding.

  The connection pipe 182 and the drain side expansion joint 19 are fixed by fastening bolts B and nuts N via connection flanges (connection parts). The drain side expansion joint 19 and the drain outlet valve 20 are fixed by fastening bolts B and nuts N via connection flanges. The drain outlet valve 20 and the drain pipe 21 are fixed by fastening bolts B and nuts N via connecting flanges.

  Moreover, the lower surface 311 of the water leakage accommodating part 311 is fixed to the connection flange so that the lower surface 311 of the water leakage accommodating part 31 and the connection flange of the drain side expansion joint 19 and the drain outlet valve 20 are sealed. The drainage side expansion joint 19, the drainage outlet valve 20, and the lower surface 311 of the water leakage accommodating portion 31 are fixed by fastening bolts B and nuts N via the connection flange and the lower surface 311. In addition, although the case where the lower surface 311 of the water leak accommodation part 31 is fixed by fastening the volt | bolt B and the nut N via a connection flange is shown, it is not limited to that case, The lower surface of the water leak accommodation part 31 311 may be fixed to the drain pipe 21 by welding.

  The support body 183 fixed to the connection pipe 182 and the upper surface 312 of the water leakage storage unit 31 are fixed. Or as shown in FIGS. 3-5, the support body 183 fixed to the connection piping 182 and the upper surface 312 of the water leak accommodating part 31 are not fixed, and the support body 183 and the upper surface 312 are slidable. In the state, the support body 183 supports the upper surface 312.

  In the latter case, even if the connection pipe 182 and the leaked water storage portion 31 undergo different vibrations due to the influence of an earthquake or the like, the support 183 and the upper surface 312 slide to make the relative relationship between the connection pipe 182 and the water leak storage portion 31. There is an effect that the displacement can be absorbed. In addition, even if the shape of the surface orthogonal to the axial direction of the water leak accommodating part 31 (when the water leak accommodating part 31 is viewed from the upper side) is a circle shown in FIG. 4 or a square shown in FIG. Other shapes may be used.

  Then, the effect | action of the circulating water system | strain 1 which concerns on 1st Embodiment is demonstrated using FIGS.

  In a normal circulation state where seawater is supplied from the open ocean S to the condenser 18 and drained from the condenser 18 in the circulating water system 1, the drain side expansion joint 19 (or the intake side expansion joint 17 is relatively weak). ) Is damaged due to deformation caused by an earthquake. In that case, the circulating water system 1 and the water source are cut off using the drain outlet valve 20 (or the intake inlet valve 16) or the siphon break 23. According to the prior art, from the detection of damage to the drain side expansion joint 19 to the time when the circulating water system 1 and the water source are cut off, the damaged part of the drain side expansion joint 19 enters the inside of the turbine building 15 (outside the system). Will leak water.

  On the other hand, according to the circulating water system 1, the leakage from the damaged portion of the drain side expansion joint 19 between the time when the drain side expansion joint 19 is detected and before the circulating water system 1 and the water source are cut off is leaked. It can be accommodated in the accommodating part 31. In addition, when the support body 183 and the upper surface 312 shown in FIG. 3 slide due to external force, it is possible to prevent deformation and breakage of the water leakage accommodating portion 31 due to the influence of an earthquake or the like.

  According to the circulating water system 1 according to the first embodiment, even if the drain side expansion joint 19 (or the intake side expansion joint 17) is damaged due to the influence of an earthquake or the like, the circulating water system 1 and the water source are cut off. In the meantime, since the water leakage accommodating part 31 accommodates the water leakage from the drain-side expansion joint 19, the water leakage into the turbine building 15 can be prevented.

(Second Embodiment)
Since the outline of the circulating water system which concerns on 2nd Embodiment is the same as that of the circulating water system 1 shown in FIG. 1, description is abbreviate | omitted.

  FIG. 6 is a diagram showing a detailed structure of the circulating water system according to the second embodiment. FIG. 6 is a side cross-sectional view including the structure of the water leakage accommodating portion.

  FIG. 6 shows a circulating water system 1A according to the second embodiment. A circulating water system 1A shown in FIG. 6 includes a condenser (connection pipe 182), a drain-side expansion joint 19, a drain outlet valve 20, a drain pipe 21, and a water leakage accommodating portion 31A. In FIG. 6, the same members as those of the circulating water system 1 shown in FIG.

  The connection pipe 182 and the drain side expansion joint 19 are fixed by fastening the bolt B and the nut N via the connection flange. The drain side expansion joint 19 and the drain outlet valve 20 are fixed by fastening bolts B and nuts N via connection flanges. The drain outlet valve 20 and the drain pipe 21 are fixed by fastening bolts B and nuts N via connecting flanges.

  31 A of water leak accommodating parts are provided so that the water leak from the drain side expansion joint 19 can be accommodated. Here, 31 A of water leak accommodating parts are arrange | positioned so that the side surface of the drain side expansion joint 19 and the drain outlet valve 20 (including the valve body 201 and the valve drive motor 202) may be enclosed. The material used as the water leakage accommodating portion 31A is an elastic material (expandable member) such as rubber. The upper side of the water leakage housing part 31A is fixed to the connection pipe 182 so that the upper side of the water leakage housing part 31A and the connection pipe 182 are sealed by the elastic force in the axial direction. The lower side of the water leakage storage part 31A is fixed to the drainage pipe 21 so that the lower side of the water leakage storage part 31A and the drainage pipe 21 are sealed by the elastic force in the axial direction.

  Then, the effect | action of 1 A of circulating water systems which concern on 2nd Embodiment is demonstrated using FIG.1 and FIG.6.

  In a normal circulation state where seawater is supplied from the open ocean S to the condenser 18 and drained from the condenser 18 in the circulating water system 1A, the drainage side expansion joint 19 (or the intake side expansion joint 17 is relatively weak). ) Is damaged due to deformation caused by an earthquake. In that case, the leakage from the damaged portion of the drain side expansion joint 19 between the detection of damage to the drain side expansion joint 19 and the circulatory water system 1A and the water source being cut off is accommodated in the leak accommodation part 31A. Can do.

  According to the circulating water system 1A according to the second embodiment, even if the drain side expansion joint 19 (or the intake side expansion joint 17) is damaged due to an earthquake or the like, the circulating water system 1A and the water source are cut off. In the meantime, the water leakage accommodating portion 31 </ b> A accommodates the water leakage from the drainage expansion joint 19, thereby preventing the water leakage into the turbine building 15.

(Third embodiment)
Since the outline of the circulating water system which concerns on 3rd Embodiment is the same as that of the circulating water system 1 shown in FIG. 1, description is abbreviate | omitted.

  FIG. 7 is a diagram illustrating a detailed structure of a circulating water system according to the third embodiment. FIG. 7 is a side cross-sectional view including the structure of the water leakage accommodating portion.

  FIG. 7 shows a circulating water system 1B according to the third embodiment. A circulating water system 1B shown in FIG. 7 includes a condenser (connection pipe 182 and support 183), a drain-side expansion joint 19, a drain outlet valve 20, a drain pipe 21, and a water leakage storage portion 31B. In FIG. 7, the same members as those of the circulating water system 1 shown in FIG.

  The connection pipe 182 and the drain side expansion joint 19 are fixed by fastening the bolt B and the nut N via the connection flange. The drain side expansion joint 19 and the drain outlet valve 20 are fixed by fastening bolts B and nuts N via connection flanges. The drain outlet valve 20 and the drain pipe 21 are fixed by fastening bolts B and nuts N via connecting flanges.

  The water leakage accommodating portion 31B is provided so as to accommodate the water leakage from the drain side expansion joint 19. The material used as the water leak accommodating portion 31B may be the same as the water leak accommodating portion 31 shown in FIG.

  Here, the water leakage accommodating portion 31B is disposed so as to surround the side surface of the drainage side expansion joint 19, the drainage outlet valve 20 (including the valve body 201 and the valve drive motor 202), and the drainage pipe 21 in the turbine building. The lower side of the water leakage storage part 31B is fixed to the foundation so that the lower side of the water leakage storage part 31B and the foundation (concrete foundation) are sealed. The lower part of the water leakage accommodating portion 31B is fixed by fastening the anchor bolt C to the foundation via the connection flange. In addition, although the case where the anchor bolt C is fastened to the foundation and the lower part side of the water leakage accommodating part 31B is fixed is shown, it is not limited to that case.

  The support body 183 fixed to the connection pipe 182 and the upper surface 312 of the water leakage storage portion 31B are fixed. Alternatively, as shown in FIG. 7, the support body 183 fixed to the connection pipe 182 and the upper surface 312 of the water leakage accommodating portion 31B are not fixed, and the support body 183 and the upper surface 312 are supported in a slidable state. The body 183 supports the upper surface 312.

  In the latter case, even if the connection pipe 182 and the water leakage accommodating part 31B undergo different vibrations due to the influence of an earthquake or the like, the support 183 and the upper surface 312 slide, so that the connection pipe 182 and the water leakage accommodating part 31B are relatively There is an effect that the displacement can be absorbed. In addition, even if the shape of the surface orthogonal to the axial direction of the water leak accommodation part 31B is circular similarly to the water leak accommodation part 31 shown in FIG. 4, it may be square like the water leak accommodation part 31 shown in FIG. Other shapes may also be used.

  Then, the effect | action of the circulating water system | strain 1B which concerns on 3rd Embodiment is demonstrated using FIG.1 and FIG.7.

  In a normal circulation state where seawater is supplied from the open ocean S to the condenser 18 and drained from the condenser 18 in the circulating water system 1B, the drain side expansion joint 19 (or the intake side expansion joint 17 is relatively weak). ) Is damaged due to deformation caused by an earthquake. In that case, the leakage from the damaged portion of the drainage side expansion joint 19 between the detection of damage to the drainage side expansion joint 19 and the circulation of the circulating water system 1B and the water source is accommodated in the leakage accommodation part 31B. Can do. In addition, the support member 183 and the upper surface 312 shown in FIG. 7 slide by an external force, so that it is possible to prevent deformation and breakage of the water leakage accommodating portion 31B due to the influence of an earthquake or the like.

  According to the circulating water system 1B according to the third embodiment, even if the drainage side expansion joint 19 (or the intake side expansion joint 17) is damaged due to an earthquake or the like, the circulating water system 1B and the water source are cut off. In the meantime, since the water leakage accommodating part 31B accommodates the water leakage from the drain side expansion joint 19, the water leakage into the turbine building 15 can be prevented.

(Fourth embodiment)
Since the outline of the circulating water system which concerns on 4th Embodiment is the same as that of the circulating water system 1 shown in FIG. 1, description is abbreviate | omitted.

  FIG. 8 is a diagram showing a detailed structure of a circulating water system according to the fourth embodiment. FIG. 8 is a side cross-sectional view including the structure of the water leakage accommodating portion.

  FIG. 8 shows a circulating water system 1C according to the fourth embodiment. A circulating water system 1C shown in FIG. 7 includes a condenser (connection pipe 182 and support 183), a drain side expansion joint 19, a drain outlet valve 20, a drain pipe 21, a water leakage accommodating portion 31C, and a medium pipe 32. In FIG. 8, the same members as those of the circulating water system 1 shown in FIG.

  The circulating water system 1 </ b> C has an intermediate pipe 32 that mediates between the drain side expansion joint 19 and the valve body 201 so that the drain side expansion joint 19 that has been deformed by an earthquake does not hinder the closing operation of the valve body 201. Is provided. Thus, in the circulating water system 1C, a certain distance is created between the drain-side expansion joint 19 and the valve body 201.

  The connection pipe 182 and the drain side expansion joint 19 are fixed by fastening the bolt B and the nut N via the connection flange. The intermediate pipe 32 is disposed between the drain side expansion joint 19 and the drain outlet valve 20. The drain-side expansion joint 19 and the intermediate pipe 32 are fixed by fastening bolts B and nuts N via connection flanges. The intermediate pipe 32 and the drain outlet valve 20 are fixed by fastening bolts B and nuts N via connection flanges. The drain outlet valve 20 and the drain pipe 21 are fixed by fastening bolts B and nuts N via connecting flanges.

  31 C of water leak accommodating parts are provided so that the water leak from the drain side expansion joint 19 can be accommodated. The material used as the water leakage accommodating part 31C may be equivalent to the water leakage accommodating part 31 shown in FIG.

  Here, the water leakage accommodating portion 31C surrounds the side surface of the drainage side expansion joint 19, the intermediate pipe 32, the drainage outlet valve 20 (including the valve body 201 and the valve drive motor 202), and the drainage pipe 21 in the turbine building. Be placed. The lower side of the water leakage accommodating part 31C is fixed to the foundation so that the lower side of the water leakage accommodating part 31C and the foundation are sealed. The lower part of the water leakage accommodating portion 31C is fixed by fastening the anchor bolt C to the foundation via the connection flange. In addition, although the case where the anchor bolt C is fastened to the foundation and the lower part side of the water leakage accommodating part 31C is fixed is shown, it is not limited to that case.

  The support body 183 fixed to the connection pipe 182 and the upper surface 312 of the water leakage accommodating portion 31C are fixed. Alternatively, as shown in FIG. 8, the support body 183 fixed to the connection pipe 182 and the upper surface 312 of the water leakage accommodating portion 31C are not fixed, and the support body 183 and the upper surface 312 are supported in a slidable state. The body 183 supports the upper surface 312.

  In the latter case, even if the connection pipe 182 and the water leakage accommodating portion 31C undergo different vibrations due to the influence of an earthquake or the like, the support 183 and the upper surface 312 slide, so that the connection pipe 182 and the water leakage accommodating portion 31C are relatively There is an effect that the displacement can be absorbed. In addition, even if the shape of the surface orthogonal to the axial direction of 31 C of water leak accommodating parts is circular similarly to the water leak accommodating part 31 shown in FIG. 4, it may be square like the water leak accommodating part 31 shown in FIG. Other shapes may also be used.

  Then, the effect | action of 1 C of circulating water systems which concern on 4th Embodiment is demonstrated using FIG.1 and FIG.8.

  In the circulating water system 1C, seawater is supplied from the open ocean S to the condenser 18 and drained from the condenser 18, and the drain-side expansion joint 19 (or the intake-side expansion joint 17) having a relatively weak strength causes an earthquake. Suppose that it has been damaged due to deformation. In that case, the leakage from the damaged portion of the drain side expansion joint 19 between the detection of damage to the drain side expansion joint 19 and the circulatory water system 1C and the water source being cut off is accommodated in the leak accommodation part 31C. Can do. In addition, the support body 183 and the upper surface 312 shown in FIG. 8 are slid by an external force, so that it is possible to prevent deformation and breakage of the water leakage storage portion 31C due to the influence of an earthquake or the like.

  Moreover, when the drainage outlet valve 20 is switched by installing the intermediate pipe 32, it is possible to avoid contact of the valve body 201 during the closing operation with the drainage expansion joint 19 that has been deformed by an earthquake. .

  According to the circulating water system 1C according to the fourth embodiment, even if the drain side expansion joint 19 (or the intake side expansion joint 17) is damaged due to an earthquake or the like, the circulating water system 1C and the water source are cut off. In the meantime, the water leakage accommodating portion 31C accommodates the water leakage from the drainage expansion joint 19 so that the water leakage into the turbine building 15 can be prevented.

  In addition, according to the circulating water system 1C according to the fourth embodiment, even if the drain side expansion joint 19 (or the water intake side expansion joint 17) is deformed, the closing function of the valve body 201 can be reliably maintained, and therefore the influence of an earthquake or the like. Thus, even if the drainage expansion joint 19 is damaged and the siphon break 23 is inoperative, the circulating water system 1C and the water source can be surely cut off.

(Fifth embodiment)
Since the outline of the circulating water system which concerns on 5th Embodiment is the same as that of the circulating water system 1 shown in FIG. 1, description is abbreviate | omitted. The circulating water system which concerns on 5th Embodiment applies the intermediate | middle piping 32 of the circulating water system 1C shown in FIG. 8 to the circulating water system 1 shown in FIGS.

  FIG. 9 is a diagram showing a detailed structure of a circulating water system according to the fifth embodiment. FIG. 9 is a side cross-sectional view including the structure of the water leakage accommodating portion.

  FIG. 9 shows a circulating water system 1D according to the fifth embodiment. The circulating water system 1D shown in FIG. 9 includes a condenser (connection pipe 182 and support 183), a drain-side expansion joint 19, a drain outlet valve 20, a drain pipe 21, a water leakage accommodating portion 31, and a medium pipe 32. In FIG. 9, the same members as those of the circulating water system 1 shown in FIG.

  In the circulating water system 1D, the intermediate pipe 32 is interposed so as to mediate between the drain side expansion joint 19 and the valve body 201 so that the drain side expansion joint 19 which has been deformed by the earthquake does not hinder the closing operation of the valve body 201. Is provided. Thus, in the circulating water system 1D, a certain distance is created between the drain side expansion joint 19 and the valve body 201.

  Then, the effect | action of the circulating water system 1D which concerns on 5th Embodiment is demonstrated using FIG.1 and FIG.9.

  In a normal circulation state where seawater is supplied from the open ocean S to the condenser 18 and drained from the condenser 18 in the circulating water system 1D, the drainage side expansion joint 19 (or the intake side expansion joint 17 is relatively weak). ) Is damaged due to deformation caused by an earthquake. In that case, leaking water from the damaged portion of the drain side expansion joint 19 from when the drain side expansion joint 19 is detected to when the circulating water system 1D and the water source are cut off is accommodated in the leak accommodation part 31. Can do. In addition, the support member 183 and the upper surface 312 shown in FIG. 9 slide by an external force, so that deformation and breakage of the water leakage accommodating portion 31 due to the influence of an earthquake or the like can be prevented.

  Moreover, when the drainage outlet valve 20 is switched by installing the intermediate pipe 32, it is possible to avoid contact of the valve body 201 during the closing operation with the drainage expansion joint 19 that has been deformed by an earthquake. .

  According to the circulating water system 1D according to the fifth embodiment, even if the drain side expansion joint 19 (or the intake side expansion joint 17) is damaged due to the influence of an earthquake or the like, the circulating water system 1D and the water source are cut off. In the meantime, since the water leakage accommodating part 31 accommodates the water leakage from the drain-side expansion joint 19, the water leakage into the turbine building 15 can be prevented.

  Further, according to the circulating water system 1D according to the fifth embodiment, even if the drain side expansion joint 19 (or the water intake side expansion joint 17) is deformed, the closing function of the valve body 201 can be reliably maintained, and therefore the influence of an earthquake or the like. Thus, even if the drain side expansion joint 19 is damaged and the siphon break 23 is inoperative, the circulating water system 1D and the water source can be surely cut off.

(Sixth embodiment)
Since the outline of the circulating water system which concerns on 6th Embodiment is the same as that of the circulating water system 1 shown in FIG. 1, description is abbreviate | omitted.

  FIGS. 10A and 10B are schematic views illustrating the structure of the water chamber of the circulating water system according to the sixth embodiment.

  FIG. 10 (A) shows the water chamber 181 of the circulating water systems 1-1D shown in FIGS. 2-3 and 6-9. FIG. 10B shows a water chamber 181E of the circulating water system 1E according to the sixth embodiment.

  The water chamber 181E shown in FIG. 10 (B) forms a cavity U by the water leakage accommodating portion 31E that has entered the interior. Due to the water leakage accommodating portion 31E, the water chamber 181E shown in FIG. 10B becomes narrower than the volume of the water chamber 181 shown in FIG.

  FIG. 11 is a diagram illustrating a detailed structure of a circulating water system according to the sixth embodiment. FIG. 11 is a side cross-sectional view including the structure of the water leakage accommodating portion.

  FIG. 11 shows a circulating water system 1E according to the sixth embodiment. A circulating water system 1E shown in FIG. 11 includes a condenser (water chamber 181E), a drain side expansion joint 19, a drain outlet valve 20, a drain pipe 21, a water leakage accommodating portion 31E, and an intermediate pipe 32. In FIG. 11, the same members as those of the circulating water system 1 shown in FIG.

  In the circulating water system 1E, the intermediate pipe 32 is interposed so as to mediate between the drain side expansion joint 19 and the valve body 201 so that the drain side expansion joint 19 which has been deformed by the earthquake does not hinder the closing operation of the valve body 201. Is provided. Thus, in the circulating water system 1E, a certain distance is created between the drain side expansion joint 19 and the valve body 201.

  The water leakage accommodating part 31E is provided so that the water leakage from the drain side expansion joint 19 can be accommodated. The material used as the water leak accommodating portion 31E may be the same as the water leak accommodating portion 31 shown in FIG. In order to form the cavity U, the water leakage accommodating portion 31E is configured by a boundary wall 313 between the water chamber 181E and the cavity U, and a lower surface body 314.

  The drain-side expansion joint 19 is provided in the cavity U formed by the water leakage accommodating portion 31E that has entered the water chamber 181E.

  The water chamber 181E and the drain-side expansion joint 19 in the cavity U are fixed by fastening bolts B and nuts N via connecting flanges. The drain-side expansion joint 19 and the intermediate pipe 32 are fixed by fastening bolts B and nuts N via connection flanges. The intermediate pipe 32 and the drain outlet valve 20 are fixed by fastening bolts B and nuts N via connection flanges. The drain outlet valve 20 and the drain pipe 21 are fixed by fastening bolts B and nuts N via connecting flanges.

  Further, the lower surface body 314 of the water leakage accommodating portion 31E is fixed to the water chamber 181E so that the lower surface body 314 of the water leakage accommodating portion 31E and the water chamber 181E are sealed. The lower surface body 314 and the water chamber 181E of the water leakage accommodating portion 31E are fixed by fastening the bolt B and the nut N.

  Further, the lower surface body 314 of the water leakage accommodation portion 31E is fixed to the connection flange so that the lower surface body 314 of the water leakage accommodation portion 31E and the connection flange of the drainage expansion joint 19 and the intermediate pipe 32 are sealed. The drain-side expansion joint 19, the intermediate pipe 32, and the lower surface body 314 of the water leakage accommodating portion 31E are fixed by fastening the bolt B and the nut N via the connection flange and the lower surface body 314. In addition, although the case where the lower surface body 314 of the water leakage accommodating part 31E is fixed by fastening the volt | bolt B and the nut N via a connection flange is shown, it is not limited to that case, The water leakage accommodating part 31E The lower surface body 314 may be fixed to the intermediate pipe 32 or the drain pipe 21 by welding.

  Then, the effect | action of the circulating water system 1E which concerns on 6th Embodiment is demonstrated using FIG.1 and FIG.11.

  In a normal circulation state where seawater is supplied from the open ocean S to the condenser 18 and drained from the condenser 18 in the circulating water system 1E, the drain side expansion joint 19 (or the intake side expansion joint 17 is relatively weak). ) Is damaged due to deformation caused by an earthquake. In that case, the leakage from the damaged part of the drain side expansion joint 19 between the detection of damage to the drain side expansion joint 19 and the circulatory water system 1E and the water source being cut off is accommodated in the leak accommodation part 31E. Can do.

  Moreover, when the drainage outlet valve 20 is switched by installing the intermediate pipe 32, it is possible to avoid contact of the water leakage accommodating portion 31E with the valve body 201.

  According to the circulating water system 1E according to the sixth embodiment, even if the drain side expansion joint 19 (or the water intake side expansion joint 17) is damaged due to an earthquake or the like, the circulating water system 1E and the water source are cut off. In the meantime, since the water leakage accommodating part 31E accommodates the water leakage from the drain side expansion joint 19, the water leakage into the turbine building 15 can be prevented.

  Moreover, according to the circulating water system 1E which concerns on 6th Embodiment, even if the drain side expansion joint 19 (or intake side expansion joint 17) deform | transforms, since the closing function of the valve body 201 can be hold | maintained reliably, the influence of an earthquake etc. Thus, the drainage expansion joint 19 is damaged, and the circulating water system 1E and the water source can be surely cut even when the siphon break 23 is inoperative.

  Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1-1E Circulating water system 14 Intake pipe 16 Intake inlet valve 17 Intake side expansion joint 18 Condenser 19 Drain side expansion joint 20 Drain outlet valve 21 Drain pipes 31-31C, 31E

Claims (9)

The water chamber of the condenser,
Piping to transport circulating water;
A valve connected to the pipe;
An expansion joint connected to the valve and the water chamber;
A water leakage container provided to accommodate water leakage from the expansion joint;
Circulating water system with   The circulating water system according to claim 1, wherein a lower side of the water leakage accommodating part is fixed to the connection part so that a lower side of the water leakage accommodating part and a connection part of the valve and the expansion joint are sealed.   The circulating water system according to claim 1, wherein the lower side of the water leakage storage part is fixed to the foundation so that the lower side of the water leakage storage part and the foundation are sealed. Further comprising a support body that supports the upper side of the water leakage accommodating portion in an unfixed manner on the outer peripheral side surface of the connection pipe of the water chamber,
The circulating water system as described in any one of Claims 1 thru | or 3 with which the upper side of the said water leak accommodating part was supported by the said support body. In order to mediate between the valve and the expansion joint, the lower side further comprises an intermediate pipe connected to the valve and the upper side to the expansion joint, respectively.
The circulating water system according to claim 1, wherein a lower side of the water leakage accommodating part is fixed to the connection part so that a lower side of the water leakage accommodating part and a connection part of the valve and the expansion joint are sealed. In order to mediate between the valve and the expansion joint, the lower side further comprises an intermediate pipe connected to the valve and the upper side to the expansion joint, respectively.
The circulating water system according to claim 1, wherein the lower side of the water leakage storage part is fixed to the foundation so that the lower side of the water leakage storage part and the foundation are sealed. Mediating piping in which the lower side is connected to the valve and the upper side is connected to the expansion joint so as to mediate between the valve and the expansion joint,
A support body that supports the upper side of the water leakage accommodating portion in a non-fixed manner on the outer peripheral side surface of the connection pipe of the water chamber,
The circulating water system according to any one of claims 1, 5, and 6, wherein an upper side of the water leakage accommodating portion is supported by the support body.   The water leakage accommodating part is fixed to the pipe so that the lower side of the water leakage accommodating part and the pipe are sealed, and the upper side of the water leakage accommodating part and the water chamber The circulating water system according to claim 1, wherein an upper portion of the water leakage accommodating portion is an elastic material fixed to the connection pipe so that the connection pipe is hermetically sealed. In order to mediate between the valve and the expansion joint, the lower side further comprises an intermediate pipe connected to the valve and the upper side to the expansion joint, respectively.
The circulating water system according to claim 1, wherein the expansion joint is provided in a cavity formed by the water leakage accommodating portion that has entered the water chamber.

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