JP6508913B2 - Piping protection device and nuclear equipment - Google Patents

Description

  The present invention is applied to a piping protection device that suppresses the progress of ejection of fluid around the piping and the breakage of the piping, for example, when the piping that passes high-temperature, high-pressure fluid breaks, and the piping protection device applies. Nuclear equipment.

  Conventionally, for example, a pipe protection device (pipe whip and jet force prevention device) described in Patent Document 1 has a plurality of clamp pipe members having a shape that can fit on the outside of the pipe, and pipes the plurality of clamp pipe members. It arranges in the state which contacted the outside, and a plurality of clamp piping members constitute clamp piping, and it is tightened so that piping may be held in close proximity and held. In addition, in the piping protection device described in Patent Document 1, a locking member is fixedly projected outside the piping, and a through hole penetrating in the thickness direction is formed in at least one clamp piping member, and the through hole is formed. The locking member is inserted into the connector to prevent the pipe from coming out of the clamp pipe.

JP-A-55-97594

  The piping protection device described in Patent Document 1 described above only inserts the through hole of the clamp piping member forming the clamp piping into the locking member of the piping, and when the piping is broken, the clamp piping from the through hole is The high temperature and high pressure fluid will be ejected to the outside of the Thus, it is difficult for the piping protection device described in Patent Document 1 to suppress the ejection of the fluid, and as a result, the effect of the ejected fluid damaging the structure around the piping, and piping by the vapor of the fluid Since the surrounding devices (electrical devices etc.) are affected by failure, it is difficult to protect the structures and devices.

  The present invention solves the above-mentioned problems, and an object of the present invention is to provide a piping protection device and a nuclear power plant capable of suppressing the progress of ejection of fluid around the piping and breakage of the piping.

  In order to achieve the above-mentioned object, the piping protection device of the present invention is provided on an outer cylinder covering an outer periphery of a predetermined portion of piping through which fluid flows, a projection fixed to the piping, and the outer cylinder Through-holes through which the protrusions are inserted, and provided at both ends of the outer cylinder along the outer periphery of the pipe, extending toward the outer peripheral surface of the pipe and having a predetermined gap with the outer peripheral surface And a side lid member attached.

  According to this pipe protection device, when the pipe is broken, the outer cylinder covers the outer periphery of the pipe, and therefore the fluid ejected from the broken portion of the pipe is blocked by the outer cylinder. Spout can be suppressed. Moreover, by providing the through hole for inserting the projection fixed to the pipe in the outer cylinder, the projection and the through hole are hooked to each other, thereby preventing the pipe whip around which the broken pipe shakes, and the progress of the fracture It can be suppressed. As a result, it is possible to prevent the fluid ejected from the piping from affecting the structures and equipment around the piping, and to protect the structures and the equipment. In addition, it is not necessary to provide a pipe whip or a jet barrier for blocking the fluid ejected from the pipe, and the effect of a large load can be eliminated on the structure side. Furthermore, by suppressing the ejection of fluid around the piping, there is no need for partitioning for physically separating the piping and the facilities that are important for safety, and the situation that affects the building shape of the facilities is prevented. be able to. Furthermore, when the piping is broken by the side lid member, the fluid jetted from the broken portion of the piping is stopped at both ends of the outer cylinder, and the amount of injected steam to the environment when the piping is broken is limited by the gap. Therefore, the effect of suppressing the ejection of the fluid around the piping can be obtained remarkably. In addition, the gap limits the amount of injected steam to the environment when the pipe is broken, and can prevent contact with the pipe when the outer cylinder and the side cover member are deformed by heat in the radial direction.

  Further, in the pipe protection device of the present invention, a lid member for closing the through hole is provided.

  According to this piping protection device, since the through hole is closed by the lid member, it is possible to prevent the fluid from spouting from the through hole.

  Further, in the pipe protection device of the present invention, at least two of the protrusion and the through hole are provided along the extending direction of the pipe.

  When the pipe is broken, the pipe tends to be separated in opposite directions from the broken portion by the injection output of the fluid. Specifically, when broken in the circumferential direction, the piping tends to be separated in opposite directions of the extending direction from the broken portion. According to the pipe protection device of the present invention, since at least two projections and through holes which are hooked to each other are provided along the extending direction of the pipe, both projections are opposite to each other in the extending direction of the pipe by the pipe. Even if they are separated in the direction of movement, the two through holes are respectively caught by the protrusions, and the protrusions are prevented from being separated between the outer cylinder. For this reason, it is possible to prevent the situation in which the pipes are separated in opposite directions starting from the broken part and coming off the outer cylinder.

  Further, in the pipe protection device of the present invention, the fixing member for fixing the pipe is attached to the outer periphery of the pipe, the outer cylinder has an opening through which the fixing member is inserted, and the opening edge of the opening Are connected to a part of the fixing member.

  According to this piping protection device, for example, the outer cylinder is seal-welded using a part of the fixing member while ensuring the connection between the piping and the fixing member at a predetermined portion of the piping fixed by the fixing member. Therefore, when the pipe is broken, the outer cylinder covers the outer periphery of the pipe, and the fluid ejected from the broken portion of the pipe is blocked by the outer cylinder, so that the jet of fluid around the pipe can be suppressed.

  In order to achieve the above-mentioned object, a nuclear installation of the present invention is a nuclear installation which generates high temperature and high pressure fluid by heat generated in a reactor, sends it by piping, and utilizes the fluid, Furthermore, any one of the pipe protection devices described above is applied.

  According to this nuclear installation, the piping protection device can prevent the fluid ejected from the piping from affecting the internal structures and equipment around the piping, and can protect the structures and equipment. For this reason, it is not necessary to provide a structure for enduring the pipe whip or a jet barrier for blocking the fluid ejected from the pipe in the internal structure of the facility, and the action of a large load can be eliminated on the structure side. Furthermore, by suppressing the ejection of fluid around the piping, there is no need for partitioning for physically separating the piping and the facilities that are important for safety, and the situation that affects the building shape of the facilities is prevented. be able to.

  According to the present invention, it is possible to suppress the progress of ejection of fluid around piping and breakage of piping.

FIG. 1 is a schematic configuration view showing an example of a nuclear power plant according to an embodiment of the present invention. FIG. 2 is a perspective view of the pipe protection device according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view in the pipe radial direction of the pipe protection device according to the first embodiment of the present invention. FIG. 4: is sectional drawing of the piping extension direction of the piping protection apparatus based on Embodiment 1 of this invention. FIG. 5: is a partially expanded sectional view of the piping extension direction of the piping protection device based on Embodiment 1 of this invention. FIG. 6 is a perspective view of a pipe protection device according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view in the pipe radial direction of the pipe protection device according to the second embodiment of the present invention. FIG. 8 is a cross-sectional view of the piping protection device according to Embodiment 2 of the present invention in the piping extension direction.

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

  FIG. 1 is a schematic configuration view showing an example of a nuclear power plant according to the present embodiment. The nuclear installation shown in FIG. 1 is a pressurized water reactor (PWR: Pressurized Water Reactor). In the nuclear power plant, the reactor pressure vessel 101, the pressurizer 102, the steam generator 103 and the primary cooling water pump 104 are sequentially connected by the primary cooling water pipe 105 in the reactor containment vessel 100, and the primary cooling is a fluid. A water circulation route is configured.

  The reactor pressure vessel 101 stores a plurality of fuel assemblies 101a, which are a core, in a sealed state, and the vessel body 101b and a vessel lid 101c mounted on the vessel body 101b so that the fuel assemblies 101a can be inserted and removed. And consists of. The container lid 101c is provided so as to be able to open and close with respect to the container body 101b. The container body 101b has a cylindrical shape that is open at the upper side and has a hemispherical shape at the lower side to be closed and has an inlet-side nozzle 101d and an outlet-side nozzle 101e for supplying and discharging light water as primary cooling water at the upper portion. It is provided. The primary cooling water pipe 105 is connected to the outlet-side nozzle 101 e so as to communicate with the inlet-side water chamber 103 a of the steam generator 103. Further, the primary cooling water pipe 105 is connected to the inlet-side nozzle 101 d so as to communicate with the outlet-side water chamber 103 b of the steam generator 103.

  In the lower portion of the steam generator 103 formed in a hemispherical shape, the inlet-side water chamber 103 a and the outlet-side water chamber 103 b are provided by being divided by the partition plate 103 c. The inlet-side water chamber 103a and the outlet-side water chamber 103b are separated from the upper side of the steam generator 103 by a tube plate 103d provided on the ceiling thereof. On the upper side of the steam generator 103, an inverted U-shaped heat transfer pipe 103e is provided. Each end of the heat transfer tube 103 e is supported by the tube plate 103 d so as to connect the inlet-side water chamber 103 a and the outlet-side water chamber 103 b. The inlet side water chamber 103a is connected to the inlet side primary cooling water pipe 105, and the outlet side water chamber 103b is connected to the outlet side primary cooling water pipe 105. In the steam generator 103, the secondary cooling water pipe 106a on the outlet side is connected to the upper end on the upper side partitioned by the tube plate 103d, and the secondary cooling water pipe 106b on the inlet side is connected to the side on the upper side It is done.

  In the nuclear power plant, the steam generator 103 is connected to the steam turbine 107 outside the reactor containment vessel 100 via the secondary cooling water pipes 106a and 106b, and a circulation path of secondary cooling water as a fluid is configured. ing.

  The steam turbine 107 has a high pressure turbine 108 and a low pressure turbine 109, and a generator 110 is connected. In the high pressure turbine 108 and the low pressure turbine 109, a moisture separation heater 111 is branched and connected from the secondary cooling water pipe 106a. The secondary cooling water pipe 106 a is provided with a steam isolation valve (on-off valve) 119 on the way from the steam generator 103 to the high pressure turbine 108 and the low pressure turbine 109. The steam isolation valve 119 is closed in an emergency or the like to isolate steam from the steam generator 103 to the high pressure turbine 108 and the low pressure turbine 109. In addition, the low pressure turbine 109 is connected to the condenser 112. The condenser 112 is connected to the secondary cooling water pipe 106b. The secondary cooling water pipe 106b is connected to the steam generator 103 as described above, and from the condenser 112 to the steam generator 103, the condensate pump 113, the low pressure feed water heater 114, the deaerator 115, the main feed water pump A high pressure feed water heater 117 and a main feed valve (open / close valve) 118 are provided.

  Therefore, in the nuclear power plant, the primary cooling water is heated by the reactor pressure vessel 101 to become high temperature and high pressure, and pressurized by the pressurizer 102 and maintained at a constant pressure, and the steam through the primary cooling water pipe 105 It is supplied to the generator 103. In the steam generator 103, the heat exchange between the primary cooling water and the secondary cooling water is performed, and the secondary cooling water is evaporated to become steam. The cooled primary cooling water after heat exchange is recovered to the primary cooling water pump 104 side through the primary cooling water pipe 105 and returned to the reactor pressure vessel 101. On the other hand, the secondary cooling water that has become steam due to heat exchange is supplied to the steam turbine 107. With respect to the steam turbine 107, the moisture separation heater 111 removes moisture from the exhaust from the high pressure turbine 108, and further heats it to a superheated state before sending it to the low pressure turbine 109. The steam turbine 107 is driven by the steam of the secondary cooling water, and the power is transmitted to the generator 110 to generate electric power. The steam provided to drive the turbine is discharged to the condenser 112. The condenser 112 exchanges heat between the cooling water (for example, seawater) taken by the pump 112 b through the water intake pipe 112 a and the steam discharged from the low pressure turbine 109, condenses the steam, and saturates the low pressure saturated liquid Back to. The cooling water used for heat exchange is discharged from the drain pipe 112c. The condensed saturated liquid becomes secondary cooling water, and is pumped out of the condenser 112 by the condensate pump 113 through the secondary cooling water pipe 106 b. Further, the secondary cooling water passing through the secondary cooling water pipe 106b is heated by the low pressure feed water heater 114, for example, by low pressure steam extracted from the low pressure turbine 109, and dissolved oxygen or non-condensed gas (ammonia gas) After the impurities such as) are removed, the water is supplied by the main feed pump 116, heated by the high pressure feed heater 117, for example, high pressure steam extracted from the high pressure turbine 108, and returned to the steam generator 103. Here, a system for supplying secondary cooling water to the steam generator 103 is referred to as a main water supply system. In the main water supply system, in order to maintain the level of secondary cooling water of the steam generator 103, the main water supply pump 116, the main water supply valve 118, and the like are controlled.

Embodiment 1
FIG. 2 is a perspective view of the pipe protection device according to the present embodiment, FIG. 3 is a cross-sectional view of the pipe protection device according to the present embodiment in the pipe radial direction, and FIG. 4 is a pipe according to the present embodiment It is sectional drawing of the piping extension direction of protection device, FIG. 5: is a partially expanded sectional view of the piping extension direction of the piping protection device which concerns on this embodiment.

  The pipe protection device 1 of the present embodiment is applied to the above-described nuclear installation. For example, the pipe protection device 1 is disposed in the secondary cooling water pipes 106a and 106b as pipes through which secondary cooling water, which is a fluid, flows in a nuclear installation. Specifically, in the secondary cooling water pipe 106 a, the pipe protection device 1 is a portion of the reactor containment vessel 100 immediately after being pulled out of the partition 100 a or a device (steam generator 103, high pressure turbine 108, low pressure turbine 109 , A moisture separation heater 111, and a steam isolation valve 119). Further, in the secondary cooling water pipe 106 b, the pipe protection device 1 is a portion of the reactor containment vessel 100 immediately after being pulled out of the partition 100 a or a device (steam generator 103, condenser 112, condensate pump 113 , The low pressure feed water heater 114, the deaerator 115, the main feed water pump 116, the high pressure feed water heater 117, and the main feed water valve 118). The pipe protection device 1 may be disposed at each welding connection portion of the primary cooling water pipe 105 as a pipe through which the primary cooling water, which is a fluid, flows in the nuclear power facility. Moreover, the piping protection device 1 which concerns on this embodiment is applied not only to a nuclear installation but to piping through which the high temperature and high pressure fluid distribute | circulates. The fluid also includes liquids such as high temperature water and gases such as steam.

  As shown in FIGS. 2 to 4, the pipe protection device 1 is configured to include an outer cylinder 2, a protrusion 3, a through hole 4, and a lid member 5.

  The outer cylinder 2 is provided in the piping 10 through which the fluid flows, such as the secondary cooling water pipes 106 a and 106 b and the primary cooling water pipe 105 described above. The outer cylinder 2 covers the outer periphery of the predetermined portion of the pipe 10 as described above, is formed in a tubular shape along the extending direction of the pipe 10, and has a plurality of pipes for attachment to the pipe 10 (in FIG. It is divided into two divided outer cylinders 2a in the radial direction of 10 and formed. The outer cylinder 2 is disposed on the pipe 10 by arranging the divided outer cylinders 2 a so as to cover the outer periphery of the pipe 10 and welding the portions where the divided outer cylinders 2 a are butted. The outer cylinder 2 is formed of, for example, carbon steel which can maintain rigidity. In FIGS. 3 and 4, a gap is shown between the outer surface of the pipe 10 and the inner surface of the outer cylinder 2.

  The protrusion 3 is fixed to the outer surface of the pipe 10 and protrudes radially from the outer peripheral surface of the pipe 10, as shown in FIG. The protrusion 3 is formed in a rectangular column shape, and is fixed to the outer peripheral surface of the pipe 10 by welding. At least two of the protrusions 3 are provided along the extending direction of the pipe 10, and a plurality of the protruding portions 3 are provided in the radial direction of the pipe 10. In the present embodiment, the extending direction of the pipe 10 is as shown in FIG. Two in total, two in total in the radial direction of the pipe 10 as shown in FIG. Further, the protrusions 3 provided along the extending direction of the pipe 10 and the protrusions 3 provided in the radial direction of the pipe 10 are provided corresponding to the positions where the divided outer cylinders 2a are attached. In addition, the protrusion part 3 may be formed not only in rectangular columnar shape but in a prismatic shape or a cylindrical shape, for example. The projection 3 is formed of, for example, carbon steel or a metal material that can be welded to the pipe 10, which can maintain the rigidity.

  The through holes 4 are provided in the outer cylinder 2 (each divided outer cylinder 2a) as shown in FIG. The through hole 4 is provided at a position corresponding to the projection 3 in a state where the outer cylinder 2 (each divided outer cylinder 2a) is attached to the pipe 10, and is formed in a size to insert the projection 3 There is. In the present embodiment, the through hole 4 is formed in a rectangular shape so as to insert the rectangular columnar protrusion 3. The protrusion 3 is inserted into the through hole 4 in a state where the outer cylinder 2 (each divided outer cylinder 2 a) is attached to the pipe 10. The protrusion 3 may penetrate through the through hole 4 and protrude to the outside of the outer cylinder 2 as shown in FIG. 3, but the protrusion 3 is inserted through the through hole 4 so as to contact at least the inner surface of the through hole 4 Just do it.

  The lid member 5 closes the through hole 4. The lid member 5 is shaped to cover the through hole 4 and is formed to be in contact with the outer peripheral surface of the outer cylinder 2 which is the periphery of the through hole 4. The lid member 5 is attached to the outer cylinder 2 by welding so as to cover the through hole 4 in a state where the outer cylinder 2 is attached to the pipe 10 and the projection 3 is inserted into the through hole 4. At this time, the lid member 5 is attached by seal welding so as to seal between the through hole 4 and the lid member 5. The lid member 5 is made of, for example, carbon steel that can maintain its rigidity.

  Thus, the pipe protection device 1 of the present embodiment is provided in the outer cylinder 2 covering the outer periphery of a predetermined portion of the pipe 10 through which the fluid flows, the projection 3 fixed to the pipe 10, and the outer cylinder 2. And a through hole 4 through which the projection 3 is inserted.

  According to the pipe protection device 1, when the pipe 10 is broken, the outer cylinder 2 covers the outer periphery of the pipe 10, so that the fluid ejected from the broken portion of the pipe 10 is blocked by the outer pipe 2. The ejection of fluid around 10 can be suppressed. Moreover, since the through hole 4 through which the projection 3 fixed to the pipe 10 is inserted is provided in the outer cylinder 2, the projection 3 and the through hole 4 are hooked to each other, thereby preventing the pipe whip around the broken pipe 10 And the progress of breakage can be suppressed. As a result, the fluid spouted from the pipe 10 can be prevented from affecting the structures and devices around the pipe 10, and the structures and devices can be protected. In addition, it is not necessary to provide a pipe whip or a jet barrier for blocking the fluid ejected from the pipe, and the effect of a large load can be eliminated on the structure side. Furthermore, by suppressing the ejection of fluid around the piping 10, there is no need for partitioning for physically separating the piping 10 and equipment important for safety, which affects the building shape of the equipment. You can prevent.

  Moreover, in the pipe protection device 1 of the present embodiment, as shown in FIGS. 2 to 5, the clearance is provided along the outer periphery of the pipe 10 at both ends of the outer cylinder 2 Side cover member 6 for narrowing the

  The side cover member 6 is formed in an annular shape, and divided into a plurality of (two in the radial direction of the pipe 10 in the drawing) divided side cover members 6 a for attachment to the pipe 10 as in the outer cylinder 2 It is formed. As shown in FIGS. 3 and 5, in the side lid member 6, the inner end 6 b of each split side lid member 6 a extending toward the outer peripheral surface of the pipe 10 has a predetermined gap with respect to the outer peripheral surface of the pipe 10. Arrange with α. It is attached to the pipe 10 together with the outer cylinder 2 by respectively welding the portion where the divided side lid members 6a are abutted and the portion where the divided side lid members 6a and the outer cylinder 2 are abutted so as to be in contact with each other. . At this time, the side cover member 6 is attached by seal welding so as to seal between the outer cylinder 2 and the side cover member 6. Further, the side cover member 6 is not welded to the pipe 10. The side lid member 6 is formed of, for example, carbon steel which can maintain rigidity. Thus, the side lid member 6 extends toward the outer peripheral surface of the pipe 10 and is disposed with a predetermined gap α with respect to the outer peripheral surface of the pipe 10.

  According to the pipe protection device 1, when the pipe 10 is broken by the side cover member 6 disposed at the both ends of the outer cylinder 2 with the predetermined gap α with respect to the outer peripheral surface of the pipe 10, the outer cylinder 2 is In order to restrict the amount of jetted steam to the environment when the pipe 10 breaks due to the gap α, the spouting of the fluid around the pipe 10 is stopped at both ends of the pipe in order to block the liquid spouted from the broken portion of the pipe 10 The suppressing effect can be obtained remarkably. Moreover, the gap α limits the amount of injected steam to the environment when the pipe 10 breaks, and prevents the contact with the pipe 10 when the outer cylinder 2 and the side cover member 6 are deformed by heat in the radial direction. it can.

  Moreover, in the piping protection device 1 of the present embodiment, the lid member 5 for closing the through hole 4 is provided.

  Since the through hole 4 is closed by the lid member 5, it is possible to prevent the fluid from spouting from the through hole 4.

  Moreover, in the pipe protection device 1 of the present embodiment, as described above, it is preferable that at least two of the protrusions 3 and the through holes 4 are provided along the extending direction of the pipe 10.

  When the pipe 10 is broken, the pipe 10 tries to be separated in opposite directions starting from the broken portion by the injection output of the fluid. Specifically, when the pipe 10 is broken in the circumferential direction, the pipe 10 tries to be separated in opposite directions in the extending direction from the broken portion. According to the pipe protection device 1 of the present embodiment, since at least two of the projections 3 and the through holes 4 that are hooked to each other are provided along the extending direction of the pipe 10, both the projections 3 can be formed by the pipe 10. Even if they are separated in the opposite direction of the extending direction of the pipe 10, both the through holes 4 will be caught by the projections 3 respectively, and the projections 3 will be prevented from being separated with the outer cylinder 2 in between. For this reason, it is possible to prevent the situation in which the pipe 10 is separated in opposite directions starting from the broken portion and coming off the outer cylinder 2. In addition, when the pipe 10 breaks and the pipe 10 is separated in opposite directions starting from the broken part due to the injection output of the fluid, the reaction force of the fluid jet acts on the separated parts to generate the pipe whip. Although the structure for enduring the pipe whip is required, according to the pipe protection device 1 of the present embodiment, the structure for resisting the pipe whip is not necessary in order to prevent the pipe whip. In addition, in order to obtain the above-mentioned effect notably, it is preferable that at least two protrusions 3 and the through holes 4 be disposed in the vicinity of both ends of the outer cylinder 2.

  Further, in the nuclear power plant of this embodiment, high temperature / high pressure fluid is generated by heat generated in the nuclear reactor, and is sent through the piping 10 (the secondary cooling water pipes 106a and 106b, the primary cooling water pipe 105, etc.) It is preferable that it is a nuclear installation to utilize, and the piping protection apparatus 1 mentioned above is applied to the piping 10. FIG.

  According to this nuclear facility, the piping protection device 1 prevents the fluid ejected from the piping 10 from affecting the internal structures and equipment around the piping 10, and protects the relevant structures and equipment. Can. For this reason, it is not necessary to provide a structure for enduring the pipe whip or a jet barrier for blocking the fluid ejected from the pipe 10 in the facility internal structure, and the action of a large load on the structure side can be eliminated. Furthermore, by suppressing the ejection of fluid around the piping 10, there is no need for partitioning for physically separating the piping 10 and equipment important for safety, which affects the building shape of the equipment. You can prevent.

Second Embodiment
6 is a perspective view of the piping protection device according to the present embodiment, FIG. 7 is a cross-sectional view of the piping protection device according to the present embodiment in the pipe radial direction, and FIG. 8 is a piping according to the present embodiment It is sectional drawing of the piping extension direction of a protective device. The piping protection device 1 of the present embodiment is different from the piping protection device 1 of the above-described first embodiment in that the piping 10 is fixed to the fixing member 11, and another configuration related to the fixing member 11 Is the same. Therefore, in the second embodiment described below, the same components as those in the first embodiment described above will be assigned the same reference numerals and descriptions thereof will be omitted.

  The pipe protection device 1 of the present embodiment is applied to the above-described nuclear installation. For example, the piping protection device 1 is provided in the piping 10 through which the fluid flows, such as the secondary cooling water pipes 106 a and 106 b and the primary cooling water pipe 105 in a nuclear power plant. Specifically, the pipe protection device 1 is provided at a weld connection portion at a pipe fixing point in a nuclear installation. The pipe fixing point is a portion having the fixing member 11.

  The fixing member 11 includes a base 11A provided on the fixed side for fixing the pipe 10, a support pillar 11B extending from the base 11A toward the side of the pipe 10, a support pillar 11B, and the pipe 10 A connecting member 11C to be connected and a connecting member 11D to connect the support column 11B to the base 11A and the connecting member 11C are configured.

  The base 11A is formed in a plate shape, and is fixed to a rigid member in the equipment. The support column 11B is formed in a columnar shape, and is formed in a cylindrical shape in the present embodiment. The support column 11B is not limited to a cylindrical shape, and may be a prism. The extending direction of the support column 11B is a direction that intersects with the extending direction of the pipe 10, and it is preferable that the extending direction is orthogonal to the extending direction of the pipe 10 in order to stably support the pipe 10. 11 C of connection members are formed along the shape of the lower half part of piping 10, and are members of the shape which made the cylinder a half. The inner surface of the connecting member 11C is formed along the outer surface shape of the pipe 10, and the outer surface of the connecting member 11C is formed along the inner surface shape of the outer cylinder 2. That is, the connecting member 11 </ b> C has a shape of a part of a cylinder, and is formed to be interposed between the pipe 10 and the outer cylinder 2. The outer edge of the connecting member 11C is connected to the pipe 10 by welding. Thus, the support column 11B and the pipe 10 are connected by the connection member 11C. The connecting member 11D is a plate that extends along the extending direction of the support post 11B around the support post 11B. The connecting members 11D are provided in four directions (every 90 degrees) around the support column 11B in the present embodiment. The connecting member 11D is connected by welding to the outer surface of the support column 11B, the upper surface of the base 11A, and the outer surface of the connecting member 11C. The outer surface of the support column 11B, the upper surface of the base 11A, and the outer surface of the connection member 11C are mutually connected by the connection member 11D, whereby the connection between the support column 11B and the base 11A and between the support column 11B and the connection member 11C The strength can be maintained.

  With respect to the pipe 10 having such a fixing member 11, in the pipe protection device 1 of the present embodiment, the outer cylinder 2 has the opening 7 through which the support column 11B and the connecting member 11D of the fixing member 11 are inserted. . The opening 7 is formed to be smaller than the size of the outer surface of the connection member 11C. The opening edge of the opening 7 is connected to the outer surface of the connecting member 11C by seal welding.

  As described above, in the pipe protection device 1 of the present embodiment, the fixing member 11 for fixing the pipe 10 is attached to the outer periphery of the pipe 10, and the outer cylinder 2 has the opening 7 through which the fixing member 11 is inserted. The opening edge of the opening 7 is connected to a part of the fixing member 11 by seal welding.

  According to this piping protection device 1, the same effect as that of the first embodiment described above can be obtained, and at a predetermined portion of the piping 10 fixed by the fixing member 11, the connection between the piping 10 and the fixing member 11 is Since the outer cylinder 2 is seal-welded using a part of the fixing member 11 while guaranteeing, when the pipe 10 is broken, the outer periphery of the pipe 10 is covered with the outer cylinder 2 and spouted from the broken portion of the pipe 10 Since the fluid to be trapped is blocked by the outer cylinder 2, the ejection of fluid around the pipe 10 can be suppressed. Since the piping protection device 1 suppresses the ejection of fluid around the piping 10 and the reaction force of the fluid ejection is received by the piping protection device 1, the function of receiving the reaction force of the fluid ejection to the fixing member 11 is added Can eliminate the need to

  In each embodiment mentioned above, although application of piping protection device 1 is illustrated as a straight pipe portion of piping 10, piping protection device 1 is applicable also in a bent part of piping 10. In this case, the extending direction of the pipe 10 means each direction that is directed after being bent.

  In addition, although the nuclear installation mentioned above demonstrated what used the pressurized water reactor (PWR: Pressurized Water Reactor), it is not this limitation. For example, although not explicitly shown in the figure, the nuclear installation may use a boiling reactor (BWR: Boiling Water Reactor), and the above-described piping protection device 1 may be configured to generate steam generated in the boiling reactor. The present invention can also be applied to piping that passes through.

DESCRIPTION OF SYMBOLS 1 Piping protection device 2 Outer cylinder 3 Protrusion part 4 Through hole 5 Lid member 6 Side lid member 6b Inner end 7 Opening 10 Piping 11 Fixing member α Gap

Claims (5)

An outer cylinder covering an outer periphery of a predetermined portion of the piping through which the fluid flows
A projection fixed to the pipe;
A through hole provided in the outer cylinder and through which the protrusion is inserted;
It is provided along the outer periphery of the pipe at both ends of the outer cylinder, is attached to the outer cylinder by seal welding , and extends toward the outer peripheral surface of the pipe so as to extend around the outer cylinder and the outer periphery of the pipe A side lid member attached with a predetermined gap to the outer peripheral surface while narrowing the gap with the surface;
A piping protection device comprising:   The piping protection device according to claim 1, further comprising a lid member closing the through hole.   The pipe protection device according to claim 1 or 2, wherein at least two of the protrusion and the through hole are provided along the extending direction of the pipe.   A fixing member for fixing the pipe is attached to an outer periphery of the pipe, the outer cylinder has an opening through which the fixing member is inserted, and an opening edge of the opening is connected to a part of the fixing member The piping protection device according to any one of claims 1 to 3, characterized in that: A nuclear facility that generates high-temperature, high-pressure fluid by heat generated by a nuclear reactor, sends it by piping, and uses the fluid,
A nuclear installation, wherein the piping protection device according to any one of claims 1 to 4 is applied to the piping.

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