JP6429520B2 - Piping protection device and nuclear facility - Google Patents

Description

  The present invention is applied to, for example, a pipe protection device that suppresses the flow of fluid around the pipe and the progress of the pipe breakage when the pipe through which a high-temperature and high-pressure fluid passes is broken. Related to nuclear facilities.

  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 be adapted to the outside of the pipe, and pipes the plurality of clamp pipe members. The clamp pipe members are arranged in contact with the outside of the pipe, and a plurality of clamp pipe members constitute the clamp pipe so that the pipes are tightly held and clamped. Further, in the pipe protection device described in Patent Document 1, a locking member is fixedly protruded on the outside of the pipe, and a through-hole penetrating in the thickness direction is formed in at least one clamp pipe member. By inserting the locking member into the pipe, the pipe is prevented from coming out of the clamp pipe.

JP-A-55-97594

  The pipe protection device described in Patent Document 1 described above merely inserts a through hole of a clamp pipe member that forms a clamp pipe into a pipe locking member. High temperature and high pressure fluid will be ejected to the outside. As described above, it is difficult for the pipe protection device described in Patent Document 1 to suppress the ejection of fluid. As a result, the influence of the ejected fluid on the structure around the pipe or the surroundings of the pipe due to the vapor of the fluid. It is difficult to protect the structure and the equipment because it has the effect of causing a failure in the equipment (such as electrical equipment).

  This invention solves the subject mentioned above, and it aims at providing the piping protection apparatus and nuclear power installation which can suppress the progress of the ejection of the fluid around piping, and the fracture | rupture of piping.

  The pipe protection device of the present invention for achieving the above-described object includes an outer cylinder that covers an outer periphery of a pipe through which a fluid flows, and a side lid member that forms a ring shape that is fixed to an axial end of the outer cylinder. The outer cylinder is configured by a plurality of divided outer cylinders that are divided in a radial direction and provided with attachment portions at end portions in the circumferential direction, and the attachment portions are in close contact with each other. Then, the side cover member is fastened by bolts, and the side cover member is constituted by a plurality of divided side cover members divided in the radial direction.

  Therefore, since the outer periphery is covered with the outer cylinder when the pipe is broken, the fluid ejected from the fractured portion is blocked by the outer cylinder, and the ejection of the fluid around the pipe can be suppressed. Further, the outer cylinder is composed of a plurality of divided outer cylinders, and can be detached by attaching bolts to each other so that the mounting portions are in close contact with each other. It can be removed and maintenance can be improved. As a result, it is possible to prevent the fluid ejected from the pipe from affecting the structures and equipment around the pipe and protect the structures and equipment.

  In the pipe protection device of the present invention, the side lid member is fixed to one end and the other end in the axial direction of the outer cylinder, and a pair of engagement is provided adjacent to the inside of the side lid member on the inner surface of the outer cylinder. While the stop member is fixed, a pair of protrusions are fixed between the pair of lock members on the outer surface of the pipe adjacent to the lock member.

  Accordingly, the side lid member and the locking member are fixed to the respective end portions on the inner surface of the outer cylinder, and the projections are fixed to the respective end portions on the outer surface of the pipe, so that when the pipe breaks, The protruding portion of the pipe is locked to the locking member of the outer cylinder, and the operation of separating the pipe from the broken portion as a starting point is prevented, and the progress of breakage in the pipe can be suppressed.

  In the pipe protection device of the present invention, the outer cylinder is supported around, the side lid member is fixed to an end portion in the axial direction of the outer cylinder, and inside the side lid member on the inner surface of the outer cylinder. While the locking member is fixed adjacently, the protruding portion is fixed adjacent to the locking member on the outer surface of the pipe.

  Therefore, the side cover member and the locking member are fixed to the end portion on the inner surface of the outer cylinder, and the protrusion is fixed to the end portion on the outer surface of the pipe, so that when the pipe breaks, the protrusion portion of the pipe The movement of the pipes that are locked by the locking member of the outer cylinder and separated from each other is prevented, and the progress of breakage in the pipes can be suppressed.

  In the pipe protection device of the present invention, the split outer cylinder has a mounting flange as the mounting portion formed at a circumferential end, the mounting flanges are in close contact with each other, and the mounting flange is bolted. It is said.

  Therefore, the mounting part of the split outer cylinder is used as a mounting flange, the mounting flanges are brought into close contact with each other and fastened with bolts and nuts, so that the split outer cylinder can be easily fastened to constitute the outer cylinder. Can be improved.

  In the pipe protection device of the present invention, the outer cylinder has a curved shape along the curved pipe.

  Accordingly, the curved portion of the pipe is a portion that requires high maintainability with respect to thinning, and the workability of maintenance can be improved by detachably providing the outer cylinder at this position.

  In the pipe protection device according to the present invention, a seal member is provided at one position where the locking member and the protrusion are opposed to each other.

  Therefore, by providing the seal member on one of the locking member and the protruding portion, when the pipe is about to be broken and separated, the protruding portion of the pipe is locked to the locking member of the outer cylinder via the sealing member. Therefore, the leakage of fluid from the end of the outer cylinder to the outside can be prevented.

  In the pipe protection device of the present invention, the pipe has an outer surface supported around the fixing member through the fixing member, the outer cylinder is provided with an opening through which the fixing member is inserted, and an opening edge of the opening has the opening It is characterized by being connected to a fixing member.

  Therefore, in the pipe fixed by the fixing member, the outer cylinder is fixed by using a part of the fixing member while ensuring the connection between the pipe and the fixing member. Since the fluid ejected from the broken part of the pipe is blocked by the above, the ejection of the fluid around the pipe can be suppressed.

  In the pipe protection device of the present invention, the pipe has one end in the axial direction supported by a surrounding support member, the outer cylinder has one end fixed to the support member, and the other end has the locking member. It is characterized by being fixed.

  Therefore, when the pipe breaks in the pipe whose one end is supported by the support member, the fluid ejected from the broken part of the pipe can be dammed by the outer cylinder, and the protruding part of the pipe is engaged with the outer cylinder. The movement to the other end side of the broken pipe, which is locked by the stop member, can be prevented, and the ejection of fluid around the pipe can be suppressed.

  Further, the nuclear power facility according to the present invention is a nuclear power facility that generates a high-temperature / high-pressure fluid by heat generated in a nuclear reactor and sends the fluid through piping, and the piping protection device is applied to the piping. It is characterized by that.

  Therefore, the pipe protective device can prevent the fluid ejected from the pipe from affecting the structures and equipment around the pipe and protect the structures and equipment.

  According to the pipe protection device and the nuclear power facility of the present invention, an outer cylinder that covers the outer periphery of the pipe is provided, a side cover member is fixed to an end portion of the inner surface of the outer cylinder, and the outer cylinder is provided with a plurality of divisions. Since it is composed of an outer cylinder, and the bolts are fastened with the mounting parts in close contact with each other, when the pipe breaks, the outer periphery is covered with the outer cylinder. The ejection of fluid around the pipe can be suppressed. Moreover, the outer cylinder and the side cover member can be removed at the time of inspection of the piping, and the maintainability can be improved. As a result, it is possible to prevent the fluid ejected from the pipe from affecting the structures and equipment around the pipe and protect the structures and equipment.

FIG. 1 is a schematic configuration diagram illustrating a nuclear facility according to the first embodiment. FIG. 2 is a partially cutaway front view showing the pipe protection device of the first embodiment. FIG. 3 is a perspective view showing the pipe protection device. FIG. 4 is a cross-sectional view in the pipe extending direction in the pipe protection device. FIG. 5 is a side view showing the pipe protection device. 6 is a cross-sectional view taken along the line VI-VI in FIG. 7 is a sectional view taken along line VII-VII in FIG. FIG. 8 is a cross-sectional view of a main part in the pipe protection device. FIG. 9 is a cross-sectional view of an essential part showing a modification of the pipe protection device. FIG. 10 is a partially cutaway front view showing the pipe protection device of the second embodiment. FIG. 11 is a perspective view showing the pipe protection device. FIG. 12 is a vertical cross-sectional view in the pipe extending direction in the pipe protection device. FIG. 13 is a horizontal cross-sectional view in the pipe extending direction in the pipe protection device. FIG. 14 is a front view illustrating the pipe protection device of the third embodiment. 15 is a cross-sectional view taken along XV-XV in FIG. FIG. 16 is a cross-sectional view illustrating a modification of the outer cylinder fastening structure.

  Embodiments of a pipe protection device and a nuclear facility 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.

[First Embodiment]
FIG. 1 is a schematic configuration diagram illustrating a nuclear facility according to the first embodiment. The nuclear facility shown in FIG. 1 is a pressurized water reactor (PWR). In this nuclear power facility, a reactor pressure vessel 101, a pressurizer 102, a steam generator 103, and a primary cooling water pump 104 are sequentially connected by a primary cooling water pipe 105 in a reactor containment vessel 100, and primary cooling that is a fluid is performed. A water circulation path is constructed.

  The reactor pressure vessel 101 stores therein a plurality of fuel assemblies 101a, which are cores, in a sealed state, and a vessel body 101b and a vessel lid 101c mounted on the upper portion thereof so that the fuel assemblies 101a can be inserted and removed. It is comprised by. The container lid 101c is provided so as to be openable and closable with respect to the container main body 101b. The container body 101b has a cylindrical shape with an upper opening and a lower hemisphere that is closed, and an inlet-side nozzle 101d and an outlet-side nozzle 101e that supply and discharge light water as primary cooling water at the upper part. Is provided. The outlet side nozzle 101e is connected to the primary cooling water pipe 105 so as to communicate with the inlet side water chamber 103a of the steam generator 103. The inlet side nozzle 101d is connected to the primary cooling water pipe 105 so as to communicate with the outlet side water chamber 103b of the steam generator 103.

  The steam generator 103 is provided with an inlet-side water chamber 103a and an outlet-side water chamber 103b partitioned by a partition plate 103c in a lower part formed in a hemispherical shape. 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 portion. On the upper side of the steam generator 103, an inverted U-shaped heat transfer tube 103e is provided. Each end of the heat transfer tube 103e is supported by the tube plate 103d so as to connect the inlet side water chamber 103a and the outlet side water chamber 103b. 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 addition, the steam generator 103 is connected to the upper side upper end partitioned by the tube plate 103d, the outlet side secondary cooling water pipe 106a, and the upper side part is connected to the inlet side secondary cooling water pipe 106b. Has been.

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

  The steam turbine 107 includes a high-pressure turbine 108 and a low-pressure turbine 109, and a generator 110 is connected thereto. In addition, the high-pressure turbine 108 and the low-pressure turbine 109 are connected to a moisture separation heater 111 that is branched from the secondary cooling water pipe 106a. The secondary cooling water pipe 106 a is provided with a steam isolation valve (open / close 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, and the steam from the steam generator 103 to the high pressure turbine 108 and the low pressure turbine 109 is isolated. 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 reaches from the condenser 112 to the steam generator 103, and the condensate pump 113, the low-pressure feed water heater 114, the deaerator 115, and the main feed water pump. 116, a high-pressure feed water heater 117 and a main feed water valve (open / close valve) 118 are provided.

  Therefore, in the nuclear power facility, the primary cooling water is heated in the reactor pressure vessel 101 to become a high temperature and a high pressure, and is pressurized by the pressurizer 102 to maintain the pressure constant, while the steam is passed through the primary cooling water pipe 105. It is supplied to the generator 103. In the steam generator 103, heat exchange between the primary cooling water and the secondary cooling water is performed, whereby the secondary cooling water evaporates and becomes steam. The cooled primary cooling water after heat exchange is recovered to the primary cooling water pump 104 side via the primary cooling water pipe 105 and returned to the reactor pressure vessel 101. On the other hand, the secondary cooling water converted into steam by heat exchange is supplied to the steam turbine 107. In connection with the steam turbine 107, the moisture separator / heater 111 removes moisture from the exhaust from the high-pressure turbine 108, further heats it to an overheated state, and then sends 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 power. Steam used for driving the turbine is discharged to the condenser 112. The condenser 112 exchanges heat between the cooling water (for example, seawater) taken by the pump 112b through the intake pipe 112a and the steam discharged from the low-pressure turbine 109, and condenses the steam to produce a low-pressure saturated liquid. Return to. The cooling water used for heat exchange is discharged from the drain pipe 112c. Further, the condensed saturated liquid becomes secondary cooling water, and is sent out of the condenser 112 by the condensate pump 113 through the secondary cooling water pipe 106b. 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 the low-pressure steam extracted from the low-pressure turbine 109, and dissolved oxygen and non-condensed gas (ammonia gas) in the deaerator 115. After the impurities such as) are removed, the water is fed by the main feed pump 116 and heated by the high-pressure steam extracted from the high-pressure turbine 108 by the high-pressure feed water heater 117 and then 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, the main water supply pump 116, the main water supply valve 118, and the like are controlled in order to maintain the water level of the secondary cooling water of the steam generator 103.

  2 is a partially cutaway front view showing the pipe protection device of the first embodiment, FIG. 3 is a perspective view showing the pipe protection device, FIG. 4 is a cross-sectional view in the pipe extending direction in the pipe protection device, and FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4, FIG. 7 is a sectional view taken along line VII-VII in FIG. 4, and FIG. .

  The pipe protection device 10 of the present embodiment is applied to the nuclear facility as described above. For example, the pipe protection device 10 is disposed in the secondary cooling water pipes 106a and 106b as pipes through which the secondary cooling water that is a fluid is circulated in a nuclear facility. Specifically, in the secondary cooling water pipe 106a, the pipe protection device 10 includes a part immediately after being pulled out of the partition wall 100a of the reactor containment vessel 100 or equipment (steam generator 103, high pressure turbine 108, low pressure turbine 109). , Moisture separation heater 111 and steam isolation valve 119). Further, in the secondary cooling water pipe 106b, the pipe protection device 10 is a part immediately after being pulled out to the outside of the partition wall 100a of the reactor containment vessel 100 or equipment (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 valve 118). Note that the pipe protection device 10 may be disposed at each weld connection portion in the primary cooling water pipe 105 as a pipe through which the primary cooling water that is a fluid is circulated in a nuclear facility. Moreover, the pipe protection device 10 according to the present embodiment is not limited to nuclear facilities, but is applied to pipes through which high-temperature and high-pressure fluid flows. The fluid includes liquid such as high temperature water and gas such as steam.

  In the first embodiment, as shown in FIGS. 2 to 7, the pipe protection device 10 is provided outside the pipe 106 having a circular cross section, and includes an outer cylinder 11 and side lid members 12 and 13. And a pair of pressure receiving members (locking members) 14 and 15 and a pair of protrusions 16 and 17.

  The outer cylinder 11 is provided outside the pipe 106 through which a fluid flows, such as the secondary cooling water pipes 106a and 106b and the primary cooling water pipe 105 described above. The outer cylinder 11 covers the outer periphery of the predetermined portion of the pipe 106 as described above, and is formed in a cylindrical shape along the extending direction (axial direction) of the pipe 106. Therefore, the outer cylinder 11 has a circular cross section, and the inner diameter is set larger than the outer diameter of the pipe 106 by a predetermined amount.

  The outer cylinder 11 is constituted by a plurality of (two in the present embodiment) divided outer cylinders 11a divided in the radial direction because it is necessary to attach the outer cylinder 11 to the outer peripheral side of the existing pipe 106 later. The split outer cylinder 11a is formed by integrally forming attachment flanges (attachment portions) 11b at respective end portions in the circumferential direction with respect to a semi-cylindrical main body. And the outer cylinder 11 is arrange | positioned so that the two division | segmentation outer cylinders 11a may cover the outer periphery of the piping 106, and each attachment flange 11b closely_contact | adheres, and it is attached to the outer side of the piping 106. . That is, the two split outer cylinders 11a are fastened by the bolts 31 passing through the mounting flanges 11b and the nuts 32 being screwed together with the mounting flanges 11b in close contact with each other. Although not shown, the two split outer cylinders 11a are fastened by bolts 31 passing through one mounting flange 11b and screwing into the other mounting flange 11b in a state where the mounting flanges 11b are in close contact with each other. May be. At this time, a seal member may be interposed between the mounting flanges 11b. Therefore, when the outer cylinder 11 is assembled outside the pipe 106, the space S is secured between the outer peripheral surface of the pipe 106 and the inner peripheral surface of the outer cylinder 11. The outer cylinder 11 is made of a material capable of maintaining rigidity, for example, carbon steel.

  The side lid members 12 and 13 are attached to one end and the other end of the outer cylinder 11 in the extending direction, and are formed in an annular shape. Therefore, the side cover members 12 and 13 have an outer diameter that is set to be substantially the same as the outer diameter of the outer cylinder 11, and an inner diameter that is set slightly larger than the outer diameter of the pipe 106.

  Since the first side lid member 12 arranged at one end of the outer cylinder 11 needs to be attached to the outer peripheral side of the existing pipe 106 later, it is divided into a plurality of (two in this embodiment) divided in the radial direction. It is comprised by the side cover member 12a. The first side lid member 12 is arranged so that each divided side lid member 12 a covers the outer periphery of the pipe 106, and each side lid member 12 a is abutted to be coupled to each other and attached to the outside of the pipe 106. . The first side cover member 12 has one surface in contact with one end surface of the outer cylinder 11 and is fixed by welding.

  Like the first side cover member 12, the second side cover member 13 disposed at the other end of the outer cylinder 11 needs to be attached to the outer peripheral side of the existing pipe 106 later, so that a plurality of parts divided in the radial direction are provided. It is comprised by the division | segmentation side cover member 13a (in this embodiment, two pieces). The second side lid member 13 is arranged so that each divided side lid member 13 a covers the outer periphery of the pipe 106, the two side lid members 13 a are abutted against each other, and both are coupled and attached to the outside of the pipe 106. . Further, the second side cover member 13 has one surface in contact with the other end surface of the outer cylinder 11 and is fixed by welding.

  Therefore, as shown in detail in FIG. 8, when the side cover members 12 and 13 are assembled outside the pipe 106 and fixed to the outer cylinder 11, the outer peripheral surface of the pipe 106 and the inner side of the side cover members 12 and 13. Gap G1, G2 is ensured between the peripheral surface. In addition, each side cover member 12 and 13 is formed with the material which can maintain rigidity, for example, carbon steel.

  The outer cylinder 11 and the side lid members 12 and 13 may be individually assembled to the pipe 106 and then joined together by welding. Alternatively, the outer cylinder 11 and the side lid members 12 and 13 may be joined to each other by welding in advance. It may be assembled.

  The pressure receiving members 14 and 15 are attached to one end and the other end of the outer cylinder 11 in the extending direction, and are formed in a shape close to an annular shape. Therefore, the pressure receiving members 14 and 15 are set to have an outer diameter that is substantially the same as the inner diameter of the outer cylinder 11, and the inner diameter is set slightly larger than the outer diameter of the pipe 106. The pressure receiving members 14 and 15 are fixed to the inner peripheral surface of the outer cylinder 11 and one surface of the side lid members 12 and 13.

  The first pressure receiving member 14 disposed in contact with the first side cover member 12 at one end of the outer cylinder 11 needs to be attached to the outer peripheral side of the existing pipe 106 later, so that a plurality of (this embodiment) divided in the circumferential direction are used. In the embodiment, it is constituted by two divided pressure receiving members 14a. The divided pressure receiving member 14 a has the same shape and is set to a length shorter than the half circumference of the outer cylinder 11. As for the 1st pressure receiving member 14, the outer peripheral surface of each division | segmentation pressure receiving member 14a contacts the inner peripheral surface of each division | segmentation outer cylinder 11a in the outer cylinder 11, and one surface of each division | segmentation pressure reception member 14a is in the 1st side cover member 12. It is in contact with one surface of each divided-side lid member 12a. In this case, each divided pressure receiving member 14 a has a length shorter than the half circumference of the outer cylinder 11, so that the upper part and the lower part on the inner circumferential surface of the outer cylinder 11 are not connected. Each divided pressure receiving member 14a is fixed to the outer cylinder 11 by welding and is fixed to the first side lid member 12 by welding. The first pressure receiving member 14 is disposed so that each divided pressure receiving member 14 a covers the outer periphery of the pipe 106.

  The second pressure receiving member 15 disposed in contact with the second side lid member 13 at the other end of the outer cylinder 11 needs to be attached to the outer peripheral side of the existing pipe 106 later, like the first pressure receiving member 14. A plurality of (two in this embodiment) divided pressure receiving members 15a divided in the radial direction are configured. The divided pressure receiving member 15 a has the same shape and is set to a length shorter than the half circumference of the outer cylinder 11. In the second pressure receiving member 15, the outer peripheral surface of each divided pressure receiving member 15 a is in contact with the inner peripheral surface of each divided outer cylinder 11 a in the outer cylinder 11, and one surface of each divided pressure receiving member 15 a is in the second side lid member 13. It is in contact with one surface of each divided-side lid member 13a. In this case, since each divided pressure receiving member 15 a has a length shorter than the half circumference of the outer cylinder 11, the upper part and the lower part on the inner peripheral surface of the outer cylinder 11 are not connected. Each divided pressure receiving member 15 a is fixed to the outer cylinder 11 by welding and is fixed to the second side lid member 13 by welding. The second pressure receiving member 15 is disposed so that each divided pressure receiving member 15 a covers the outer periphery of the pipe 106.

  Therefore, as shown in detail in FIG. 8, when the pressure receiving members 14 and 15 are assembled together with the outer cylinder 11 and the side cover members 12 and 13 on the outside of the pipe 106, the outer peripheral surface of the pipe 106 and the pressure receiving members 14 and 15 are assembled. Gap G3, G4 is ensured between the inner peripheral surface of each of the two. The gaps G3 and G4 are set larger than the gaps G1 and G2. The pressure receiving members 14 and 15 are made of a material capable of maintaining rigidity, for example, carbon steel.

  The protrusions 16 and 17 are fixed to the outer peripheral surface of the pipe 106, protrude outward in the radial direction from the outer peripheral surface of the pipe 106, and are formed in a shape close to an annular shape. The protrusions 16 and 17 are fixed to each end in the extending direction at a predetermined portion of the pipe 106 covered with the outer cylinder 11. Specifically, the protrusions 16 and 17 are disposed between the pair of pressure receiving members 14 and 15 on the outer peripheral surface of the pipe 106 and adjacent to the pressure receiving members 14 and 15. Therefore, the protrusions 16 and 17 have an inner diameter set to be substantially the same as the outer diameter of the pipe 106, and the outer diameter is set slightly smaller than the inner diameter of the outer cylinder 11.

  The first protrusions 16 arranged on the first pressure receiving member 14 side of the outer cylinder 11 in the pipe 106 need to be attached later to the outer peripheral side of the existing pipe 106, so that a plurality of (in this embodiment, divided in the radial direction) 2) split projections 16a. The division | segmentation protrusion part 16a comprises the same shape, and is set to the length shorter than the half periphery of the piping 106. FIG. The first protrusions 16 are arranged such that the respective divided protrusions 16a are in contact with the outer periphery of the pipe 106, and are joined by welding. In this case, since each divided projection 16a has a length shorter than the half circumference of the pipe 106, the left and right side parts on the outer peripheral surface of the pipe 106 are not connected. The second protrusion 17 disposed on the second pressure receiving member 15 side of the outer cylinder 11 in the pipe 106 needs to be attached to the outer peripheral side of the existing pipe 106 later in the same manner as the first protrusion 16, and thus in the radial direction. A plurality of (two in the present embodiment) divided projections 17a are divided. The division | segmentation protrusion part 17a comprises the same shape, and is set to the length shorter than the half periphery of the piping 106. FIG. The 2nd projection part 17 is arranged so that each division projection part 17a may contact the perimeter of piping 106, and is joined by welding. In this case, since each divided projection 17a has a length shorter than the half circumference of the pipe 106, the left and right side parts on the outer peripheral surface of the pipe 106 are not connected.

  Therefore, as shown in detail in FIG. 8, when the protrusions 16 and 17 are fixed to the outside of the pipe 106, a gap G <b> 5 is formed between the outer peripheral surface of the protrusions 16 and 17 and the inner peripheral surface of the outer cylinder 11. G6 is secured. The protrusions 16 and 17 are made of a material that can maintain rigidity, for example, carbon steel or a metal material that can be welded to the pipe 106.

  As shown in FIG. 4, the pipe protection device 10 of the present embodiment fixes the side cover members 12 and 13 to each end portion on the inner peripheral surface of the outer cylinder 11 that covers the outer periphery of the pipe 106 and has a pressure receiving member on the inner side thereof. The projections 16 and 17 are fixed on the outer peripheral surface of the pipe 106 adjacent to the inner side of the pressure receiving members 14 and 15. That is, in the pipe protection device 10, as shown in FIG. 8, the outer cylinder 11 is disposed outside the pipe 106, and the side lid members 12 and 13 and the pressure receiving members 14 and 15 are fixed to each end of the outer cylinder 11. The protrusions 16 and 17 are fixed to the outer peripheral surface of the pipe 106 adjacent to the pressure receiving members 14 and 15. In this case, it is desirable to provide an assembly gap between the pressure receiving members 14 and 15 and the protrusions 16 and 17.

  In this embodiment, as shown in FIG. 2, the pipe 106 is supported by a peripheral supporting member 22 (such as a wall of a building or a device frame) on the fixed side by a fixing member 21, thereby protecting the pipe. The device 10 is supported by the fixing member 21.

  The fixing member 21 includes a base 21 a that is fixed to the support member 22 that supports the pipe 106, a support column 21 b that extends from the base 21 a toward the side of the pipe 106, a support column 21 b, and the pipe 106. And a connecting member (pad) 21c for connecting a reinforcing member around the support column 21b.

  The base 21a is formed in a plate shape, and is fixed to a support member 22 having rigidity in the facility. The support column 21b is formed in a columnar shape or a rectangular column shape, and a lower end portion is fixed to the base 21a. The connection member 21c is formed along the shape of the lower half portion of the pipe 106, and is a member having a shape in which a cylinder is halved. The connecting member 21 c has an inner peripheral surface formed along the outer peripheral surface shape of the pipe 106 and an outer peripheral surface formed along the inner peripheral surface shape of the outer cylinder 11. That is, the connecting member 21 c has a shape of a part of a cylinder and is disposed so as to be interposed between the pipe 106 and the outer cylinder 11. The connecting member 21c has an outer edge connected to the pipe 106 by welding. And the support pillar 21b is connected to the piping 106 by fixing an upper end part to the connection member 21c.

  In the pipe protection device 10, an opening 23 is formed in the lower part of the outer cylinder 11, and in the fixing member 21, the upper part of the support column 21 b is inserted through the opening 23. The opening 23 opens smaller than the size of the outer peripheral surface of the connection member 21c, and is formed to have substantially the same diameter as the outer diameter of the support column 21b. The opening 23 has an opening edge connected to the outer peripheral surface of the support column 21b by welding.

  In the pipe protection device 10 of the first embodiment described above, as shown in FIG. 4, when the pipe 106 breaks at the breaking position F, the pipes 106 try to be separated from each other starting from the breaking position F. That is, one (left side) of the piping 106 tries to move in the direction of arrow A, and the other (right side) tries to move in the direction of arrow B. At this time, since the protruding portions 16 and 17 abut on the pressure receiving members 14 and 15 in the piping 106, the piping 106 is prevented from moving. Therefore, although the pipe 106 flows out of the fluid from the fracture portion (fracture position F), the fluid stays in the space S covered by the outer cylinder 11 and the side cover members 12 and 13, and The ejection of fluid to the outside is suppressed. Further, since the movement of the broken pipe 106 is prevented, the pipe whip around which the broken pipe 106 swings is prevented, and the progress of the break is suppressed.

  In addition, the piping protection apparatus 10 of 1st Embodiment is not limited to the structure mentioned above. FIG. 9 is a cross-sectional view of an essential part showing a modification of the pipe protection device.

  As shown in FIG. 9, metal packings (seal members) 18 and 19 are provided at one position where the pressure receiving members 14 and 15 and the protrusions 16 and 17 face each other.

  The metal packings 18 and 19 are attached to the surfaces of the pressure receiving members 14 and 15 facing the protrusions 16 and 17, and are formed in an annular shape. The metal packings 18 and 19 have an outer diameter set to be substantially the same as the inner diameter of the outer cylinder 11, and the inner diameter is set to be slightly larger than the outer diameter of the pipe 106. The metal packings 18 and 19 are fixed to the inner peripheral surface of the outer cylinder 11 and one surface of the pressure receiving members 14 and 15. The metal packings 18 and 19 are composed of a plurality of (two in this embodiment) divided packings divided in the circumferential direction. The metal packings 18 and 19 have an outer peripheral surface that is in close contact with the inner peripheral surface of the outer cylinder 11, one surface that is in close contact with one surface of the pressure receiving members 14 and 15, and are fixed by a plurality of bolts 33 and 34. Therefore, when the outer cylinder 11, the side cover members 12 and 13, the pressure receiving members 14 and 15, and the metal packings 18 and 19 are assembled outside the pipe 106, the outer peripheral surface of the pipe 106 and the inner circumferences of the metal packings 18 and 19. Gaps G7 and G8 are secured between the surfaces.

  In addition, since the metal packings 18 and 19 are constituted by divided packings, it is desirable to interpose a seal member on the end face where the divided pressure receiving members 14a and 15a constituting the pressure receiving members 14 and 15 are abutted. Further, although the metal packings 18 and 19 are attached to the surfaces of the pressure receiving members 14 and 15 facing the protrusions 16 and 17, they may be attached to the surfaces of the protrusions 16 and 17 facing the pressure receiving members 14 and 15.

  Therefore, when the pipes 106 break at the breaking position F, the pipes 106 try to be separated from each other starting from the breaking position F. At this time, since the projections 16 and 17 come into contact with the pressure receiving members 14 and 15 via the metal packings 18 and 19 and are locked, the pipe 106 is prevented from moving the broken pipe 106. Further, when the metal packings 18 and 19 interposed between the protrusions 16 and 17 and the pressure receiving members 14 and 15 are pressed, the space S becomes a sealed space. Therefore, although the fluid flows out from the fractured portion of the pipe 106, this fluid remains in the sealed space portion S covered with the outer cylinder 11 and the pressure receiving members 14, 15, and the fluid to the outside of the outer cylinder 11 Is suppressed.

  As described above, in the pipe protection device according to the first embodiment, the outer cylinder 11 that covers the outer periphery of the pipe 106 through which the fluid flows, and the side cover that forms a ring shape that is fixed to the axial end of the outer cylinder 11. The members 12 and 13 are provided, and the outer cylinder 11 is divided into a plurality of divided outer cylinders 11a that are divided in the radial direction and provided with mounting flanges 11b at the end portions in the circumferential direction. By doing so, the plurality of divided outer cylinders 11a are connected, and the side cover members 12 and 13 are constituted by a plurality of divided side cover members 12a and 13a divided in the radial direction.

  Therefore, since the outer periphery is covered with the outer cylinder 11 when the pipe 106 is broken, the fluid ejected from the fractured portion is blocked by the outer cylinder 11, and the ejection of the fluid around the pipe 106 is suppressed. be able to. Moreover, the outer cylinder 11 is comprised by the some division | segmentation outer cylinder 11a, and it is possible to remove by attaching the mounting flange 11b to each other and fastening with bolts. For example, when the pipe 11 is inspected, the outer cylinder 11 is removed. And the side cover members 12 and 13 can be removed, and the maintainability can be improved. As a result, it is possible to prevent the fluid ejected from the pipe 106 from affecting the structures and equipment around the pipe 106 and protect the structures and equipment.

  In the piping protection device according to the first embodiment, the side cover members 12 and 13 are fixed to one end and the other end in the axial direction of the outer cylinder 11, and the inner side of the side cover members 12 and 13 on the inner peripheral surface of the outer cylinder 11. A pair of pressure receiving members 14 and 15 are fixed adjacent to each other, while a pair of protrusions 16 and 17 are fixed adjacent to each other between the pressure receiving members 14 and 15 on the outer peripheral surface of the pipe 106.

  Accordingly, the pressure receiving members 14 and 15 are fixed to the respective end portions on the inner peripheral surface of the outer cylinder 11, and the protrusions 16 and 17 are fixed to the respective end portions on the outer peripheral surface of the pipe 106. Since the protrusions 16 and 17 are locked to the pressure receiving members 14 and 15 of the outer cylinder 11, the operation of separating the pipe 106 from the fracture portion is prevented, and the progress of the fracture in the pipe 106 can be suppressed. .

  Further, it is not necessary to install a pipe whip or a jet barrier that blocks the fluid ejected from the pipe 106 in the structure, and it is possible to eliminate the action of a large load on the structure side. Further, by suppressing the ejection of fluid around the pipe 106, there is no need for partitioning for physically separating the pipe 106 and safety-important equipment, and this affects the building shape of the equipment. Can be prevented.

  In the pipe protection device according to the first embodiment, the mounting flange 11b is formed at the end portion in the circumferential direction of the split outer cylinder 11a, the mounting flanges 11b are brought into close contact with each other, and the mounting flanges 11b are bolted together by bolts 31. Therefore, the outer cylinder 11 can be configured by easily fastening the divided outer cylinder 11a, and the assembling property can be improved.

  In the piping protection device of the first embodiment, metal packings 18 and 19 are provided on the surfaces of the pressure receiving members 14 and 15 that face the protrusions 16 and 17. Accordingly, the space portion S is in a sealed state, and the fluid flowing out from the fracture portion can be retained in the space portion S, and leakage of fluid from the end portion of the outer cylinder 11 to the outside can be prevented. As a result, it is possible to prevent the fluid ejected from the pipe 106 from affecting the structures and equipment around the pipe 106 and protect the structures and equipment.

  In the pipe protection device according to the first embodiment, the outer peripheral surface of the pipe 106 is supported by the surrounding support member 22 via the fixing member 21, and the opening 23 is inserted into the outer cylinder 11. The opening edge of 23 is connected to the fixing member 21. Therefore, in the pipe 106 fixed by the fixing member 21, the pipe 106 is used to fix the outer cylinder 11 using a part of the fixing member 21 while ensuring the connection between the pipe 106 and the fixing member 21. Since the fluid ejected from the fractured portion of the pipe 106 is blocked by the outer cylinder 11 when the pipe is broken, the ejection of the fluid around the pipe 106 can be suppressed.

  In the piping protection device of the first embodiment, each of the pressure receiving members 14 and 15 is constituted by two divided pressure receiving members 14 a and 15 a, and the circumferential length of each of the divided pressure receiving members 14 a and 15 a is from the half circumference of the outer cylinder 11. And the upper and lower portions of the outer cylinder 11 are not connected. Further, each of the projections 16 and 17 is composed of two divided projections 16a and 17a, and the circumferential length of each of the division projections 16a and 17a is shorter than the half circumference of the pipe 106. The sides of the are not connected. Therefore, it is possible to improve the assembling property of the pressure receiving members 14 and 15 (divided pressure receiving members 14a and 15a) with respect to the outer cylinder 11 (divided outer cylinder 11a), and the protrusions 16 and 17 (divided protrusion 16a with respect to the pipe 106). 17a) can be improved.

  Further, in the nuclear power facility of the first embodiment, a high-temperature / high-pressure fluid is generated by heat generated in the nuclear reactor, and is sent through the pipe 106 (secondary cooling water pipes 106a, 106b, etc.) to use the fluid. The pipe protection device 10 is applied to the pipe 106 in a nuclear facility.

  Accordingly, the pipe protection device 10 can prevent the fluid ejected from the pipe 106 from affecting the structures and equipment around the pipe 106 and protect the structures and equipment.

[Second Embodiment]
FIG. 10 is a partially cutaway front view showing a pipe protection device according to the second embodiment, FIG. 11 is a perspective view showing the pipe protection device, and FIG. 12 is a vertical sectional view of the pipe protection direction in the pipe protection device. 13 is a horizontal cross-sectional view in the pipe extending direction in the pipe protection device. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

  In the second embodiment, as shown in FIGS. 10 to 13, the pipe protection device 40 is provided outside the pipe 106 having a circular cross section, and includes an outer cylinder 41, a side lid member 42, A pressure receiving member (locking member) 43 and a protrusion 44 are provided. Here, one end of the pipe 106 in the extending direction is inserted into a through hole 52 formed in the wall (support member) 51 and is fixed to the wall 51 by a fixing member (not shown). In addition, the pipe 106 is provided with a curved portion 106 a in which the other end side of the wall portion 51 that protrudes from the through hole 52 is curved.

  The outer cylinder 41 covers the outer periphery of a predetermined portion of the pipe 106 and is formed in a cylindrical shape along the extending direction (axial direction) of the pipe 106. The outer cylinder 41 has a circular cross section, and the inner diameter is set larger than the outer diameter of the pipe 106 by a predetermined amount. The outer cylinder 41 is configured by a plurality (two in the present embodiment) of divided outer cylinders 41a that are divided in the radial direction because it is necessary to be attached to the outer peripheral side of the existing pipe 106 later. The split outer cylinder 41a is configured such that an attachment flange (attachment part) 41b is integrally formed at each end in the circumferential direction with respect to a semi-cylindrical main body. And the outer cylinder 41 is arrange | positioned so that the two division | segmentation outer cylinders 41a may cover the outer periphery of the piping 106, and each attachment flange 41b closely_contact | adheres, and it is attached to the outer side of the piping 106. . That is, the two split outer cylinders 41a are fastened by the bolts 45 passing through the mounting flanges 41b in a state where the mounting flanges 41b are in close contact with each other. .

  The wall 51 is fixed with an annular mounting base 53 around the through hole 52. The split outer cylinder 41 a constituting the outer cylinder 41 is integrally formed with a mounting flange 41 c at one end in the axial direction, and the plurality of mounting flanges 41 c are in close contact with the mounting base 53 and fixed by a plurality of bolts 46. Therefore, the outer cylinder 41 is assembled outside the pipe 106. The piping 106 is provided with a curved portion 106a on the other end portion side that protrudes from the through hole 52 of the wall portion 51, and the outer cylinder 41 has a curved shape, similarly to the curved portion 106a. In FIG. 11, the piping 106 and the outer cylinder 41 are drawn in a straight line for easy understanding.

  The side lid member 42 is attached to the other end portion of the outer cylinder 41 in the extending direction, and is formed in an annular shape. The side cover member 42 has an outer diameter that is set to be substantially the same as the outer diameter of the outer cylinder 41, and an inner diameter that is set slightly larger than the outer diameter of the pipe 106. The side cover member 42 contacts the other end surface of the outer cylinder 41 and is fixed by welding.

  The pressure receiving member 43 is attached to the other end portion of the outer cylinder 41 in the extending direction, and is formed in an annular shape. The pressure receiving member 43 has an outer diameter set to be substantially the same as the inner diameter of the outer cylinder 41, and the inner diameter is set slightly larger than the outer diameter of the pipe 106. The pressure receiving member 43 is fixed to the inner peripheral surface of the outer cylinder 41 and one surface of the side lid member 42.

  The projecting portion 44 is fixed to the outer peripheral surface of the pipe 106, protrudes radially outward from the outer peripheral surface of the pipe 106, and is formed in an annular shape. The protrusion 44 is fixed to the other end in the extending direction at a predetermined portion of the pipe 106 covered with the outer cylinder 41. Specifically, the protrusion 44 is disposed on the wall 51 side of the pressure receiving member 43 on the outer peripheral surface of the pipe 106 and adjacent to the pressure receiving member 43. The protrusion 44 has an inner diameter set to be substantially the same as the outer diameter of the pipe 106, and the outer diameter is set slightly smaller than the inner diameter of the outer cylinder 41.

  In the pipe protection device 40 of the present embodiment, the side cover member 42 is fixed to the other end portion of the outer cylinder 41 that covers the outer periphery of the pipe 106 whose one end side is supported by the wall portion 51, and the pressure receiving member 43 is fixed to the inside thereof. On the other hand, the protrusion 44 is fixed to the outer peripheral surface of the pipe 106 adjacent to the inside of the pressure receiving member 43.

  Therefore, when the pipes 106 break at the breaking position F, the pipes 106 try to be separated from each other starting from the breaking position F. That is, since one side (right side) of the pipe 106 is supported by the wall 51, the other side (left side) tends to move in the direction of arrow C. At this time, since the protruding portion 44 abuts on the pressure receiving member 43 and the piping 106 is locked, the piping 106 is prevented from moving. Therefore, although the fluid flows out from the fractured portion (rupture position F), the pipe 106 remains in the space S covered by the outer cylinder 41 and the side lid member 42, and goes to the outside of the outer cylinder 41. The ejection of fluid is suppressed. Further, since the movement of the broken pipe 106 is prevented, the pipe whip around which the broken pipe 106 swings is prevented, and the progress of the break is suppressed.

  As described above, in the pipe protection device according to the second embodiment, the outer cylinder 41 that covers the outer periphery of the pipe 106 through which the fluid flows, and the side cover that forms a ring shape that is fixed to the end of the outer cylinder 41 in the axial direction. The member 42 is provided, and the outer cylinder 41 is divided into a plurality of divided outer cylinders 41a that are divided in the radial direction and provided with mounting flanges 41b at the end portions in the circumferential direction. A plurality of divided outer cylinders 41a are connected.

  Therefore, since the outer periphery is covered with the outer cylinder 41 when the pipe 106 is broken, the fluid ejected from the fractured portion is blocked by the outer cylinder 41 and suppresses the ejection of fluid around the pipe 106. be able to. Further, the outer cylinder 41 is constituted by a plurality of divided outer cylinders 41a, and can be removed by attaching the mounting flanges 41b to each other and bolted together. For example, when the pipe 106 is inspected, the outer cylinder 41 is removed. And the side cover member 42 can be removed, and the maintainability can be improved. As a result, it is possible to prevent the fluid ejected from the pipe 106 from affecting the structures and equipment around the pipe 106 and protect the structures and equipment.

  In the pipe protection device according to the second embodiment, the outer cylinder 41 whose one end is supported by the wall 51 and whose outer end is covered by the wall 51 with respect to the pipe 106 whose one end is supported by the wall 51 is covered. A side cover member 42 fixed to the other end portion of the outer cylinder 41 in the axial direction, a pressure receiving member (locking member) 43 fixed inside the side cover member 42, and a pressure receiving member on the outer peripheral surface of the pipe 106 And a protrusion 44 fixed adjacent to 43.

  Therefore, since the outer periphery is covered with the outer cylinder 41 when the pipe 106 is broken, the fluid ejected from the fractured portion is blocked by the outer cylinder 41 and suppresses the ejection of fluid around the pipe 106. be able to. In addition, the pressure receiving member 43 is fixed to each end portion on the inner peripheral surface of the outer cylinder 41, and the protrusion portion 44 is fixed to each end portion on the outer peripheral surface of the pipe 106. 44 is locked to the pressure receiving member 43 of the outer cylinder 41, and the operation of separating the pipe 106 from the fractured portion is prevented, and the progress of fracture in the pipe 106 can be suppressed. As a result, it is possible to prevent the fluid ejected from the pipe 106 from affecting the structures and equipment around the pipe 106 and protect the structures and equipment.

  Further, it is not necessary to install a pipe whip or a jet barrier that blocks the fluid ejected from the pipe 106 in the structure, and it is possible to eliminate the action of a large load on the structure side. Further, by suppressing the ejection of fluid around the pipe 106, there is no need for partitioning for physically separating the pipe 106 and safety-important equipment, and this affects the building shape of the equipment. Can be prevented.

  In the pipe protection device of the second embodiment, the outer cylinder 41 has a curved shape along the curved portion 106a of the pipe 106 having a curved shape. Therefore, the curved portion 106a of the pipe 106 is likely to be thinned by the fluid flowing on the inner surface, and needs to be maintained after a predetermined period. Therefore, since the outer cylinder 41 arranged around the curved portion 106a of the pipe 106 is detachable, maintenance workability can be improved.

  In the pipe protection device according to the second embodiment, one end of the pipe 106 in the axial direction is supported by the surrounding wall 51, and the outer cylinder 41 has one end fixed to the wall 51 and the other end receiving a pressure receiving member. 43 is fixed. Accordingly, the fluid ejected from the broken portion of the pipe 106 can be blocked by the outer cylinder 41, and the projection 44 of the pipe 106 is locked to the pressure receiving member 43 of the outer cylinder 41, so that the other end portion of the broken pipe 106 is broken. The movement to the side can be prevented, and the ejection of fluid around the pipe 106 can be suppressed.

[Third Embodiment]
FIG. 14 is a front view showing the pipe protection device of the third embodiment, and FIG. 15 is a cross-sectional view taken along the line XV-XV in FIG. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

  In the third embodiment, as shown in FIGS. 14 and 15, the pipe protection device 60 is provided outside the pipe 106 having a circular cross section, and includes an outer cylinder 61, a side lid member 62, A pressure receiving member (locking member) 63 and a protrusion 64 are provided. Here, the pipe 106 is supported by the support member 22 by the fixing member 21.

  The outer cylinder 61 covers the outer periphery of a predetermined part of the pipe 106 and is formed in a cylindrical shape along the extending direction (axial direction) of the pipe 106. The outer cylinder 61 has a circular cross section, and the inner diameter is set larger than the outer diameter of the pipe 106 by a predetermined amount. The outer cylinder 61 is constituted by a plurality (two in the present embodiment) of divided outer cylinders 61a that are divided in the radial direction because it is necessary to be attached to the outer peripheral side of the existing pipe 106 later. The split outer cylinder 61a is formed with recesses 61b at predetermined intervals in the axial direction at respective end portions in the circumferential direction with respect to the semi-cylindrical body, thereby forming mounting flanges (mounting portions) 61c. . And the outer cylinder 61 is arrange | positioned so that the two division | segmentation outer cylinders 61a may cover the outer periphery of the piping 106, and each attachment flange 61c is closely_contact | adhered, and it is attached to the outer side of the piping 106. . That is, the two split outer cylinders 61a are fastened by the bolts 65 passing through the mounting flanges 61c and the nuts 66 being screwed together with the mounting flanges 61c in close contact with each other.

  Note that the two split outer cylinders 61a are not limited to the fastening method and the structure described above. FIG. 16 is a cross-sectional view illustrating a modification of the outer cylinder fastening structure. As shown in FIG. 16, with the mounting flanges 61c of the two split outer cylinders 61a being in close contact with each other, the presser bolt 66 passes through one mounting flange 61c and is screwed into the other mounting flange 61c. You may fasten.

  As shown in FIGS. 14 and 15, the side lid member 62 is attached to the other end portion of the outer cylinder 61 in the extending direction, and is formed in an annular shape. The side lid member 62 has an outer diameter set to be substantially the same as the inner diameter of the outer cylinder 61, and the inner diameter is set to be slightly larger than the outer diameter of the pipe 106. The side lid member 62 contacts the other end surface of the outer cylinder 61 and is fixed by welding.

  The pressure receiving member 63 is attached to the other end portion of the outer cylinder 61 in the extending direction, and is formed in an annular shape. The pressure receiving member 63 has an outer diameter set to be substantially the same as the inner diameter of the outer cylinder 61, and the inner diameter is set slightly larger than the outer diameter of the pipe 106. The pressure receiving member 63 is fixed to the inner peripheral surface of the outer cylinder 61 and one surface of the side lid member 62.

  The protrusion 64 is fixed to the outer peripheral surface of the pipe 106, protrudes radially outward from the outer peripheral surface of the pipe 106, and is formed in an annular shape. The protruding portion 64 is fixed to the other end portion in the extending direction at a predetermined portion of the pipe 106 covered with the outer cylinder 61. Specifically, the protrusion 64 is disposed between the pressure receiving member 63 on the outer peripheral surface of the pipe 106 and adjacent to the pressure receiving member 63. The protrusion 64 is set to have an inner diameter substantially the same as the outer diameter of the pipe 106, and the outer diameter is set slightly smaller than the inner diameter of the outer cylinder 61.

  As described above, in the pipe protection device according to the third embodiment, the outer cylinder 61 that covers the outer periphery of the pipe 106 through which the fluid flows, and the side lid that forms a ring shape that is fixed to the axial end of the outer cylinder 61. A member 62, and a plurality of divided outer cylinders 61a in which the outer cylinder 61 is divided in the radial direction and the mounting flange 61c is provided at the end in the circumferential direction, and the mounting flanges 61c are brought into close contact with each other and bolted. The plurality of split outer cylinders 61a are connected.

  Therefore, the outer cylinder 61 is composed of a plurality of divided outer cylinders 61a, and can be removed by fastening the bolts with the mounting flanges 61c in close contact with each other. For example, when the pipe 106 is inspected, the outer cylinder 61 is removed. And the side cover member 62 can be removed, and the maintainability can be improved.

  In the embodiment, the outer cylinders 11, 41, 61 are composed of two divided outer cylinders 11a, 41a, 61a, but may be divided into three or more.

  In the second embodiment, the pipe protection device 40 is provided for the pipe 106 whose one end is supported by the wall 51. However, as in the first embodiment, the outer peripheral surface is supported by the surrounding support member 22. A pipe protection device 40 may be provided for the pipe 106 formed.

  In the embodiment described above, the application of the pipe protection device is illustrated as a straight pipe portion of the pipe, but the pipe protection device can also be applied to a curved portion of the pipe. The extending direction of the piping in this case refers to each direction facing after bending.

  Moreover, although the nuclear facility mentioned above demonstrated what used the pressurized water reactor (PWR: Pressurized Water Reactor), it is not this limitation. For example, although not shown in the figure, it may be a nuclear facility using a boiling water reactor (BWR), and the pipe protection device is a pipe through which steam generated in the boiling reactor passes. Can also be applied. Furthermore, the piping protection device of the present invention can be applied not only to nuclear facilities but also to any piping as long as it is a piping that transports a fluid such as gas or liquid.

10, 40, 60 Piping protection device 11, 41, 61 Outer cylinder 11a, 41a, 61a Split outer cylinder 11b, 41b, 61c Mounting flange (mounting part)
12, 13, 42, 62 Side cover member 14, 15, 43, 63 Pressure receiving member (locking member)
16, 17, 44, 64 Protrusion 18, 19 Metal packing (seal member)
21 Fixing member 22 Supporting member 31, 45, 46, 65, 66 Bolt 32, 66 Nut 51 Wall (supporting member)
52 Through hole 106 Piping

Claims (9)

An outer cylinder covering the outer periphery of the pipe through which the fluid flows;
A side lid member having a ring shape fixed to an axial end of the outer cylinder;
A locking member that contacts the inside of the side lid member and is fixed to the inner surface of the outer cylinder;
A protrusion fixed adjacent to the locking member on the outer surface of the pipe;
Have
The outer cylinder is constituted by a plurality of divided outer cylinders that are divided in the radial direction and provided with attachment portions at end portions in the circumferential direction.
The plurality of split outer cylinders are fastened with bolts with the mounting portions in close contact with each other,
The side lid member is composed of a plurality of divided side lid members divided in the radial direction ,
The locking member is composed of a plurality of divided locking members that are divided in the radial direction and shorter than the circumferential length of the outer cylinder.
Piping protection device characterized by that. The side lid member is fixed to one end and the other end in the axial direction of the outer cylinder, and a pair of the locking members are fixed adjacent to the inner side of the side lid member on the inner surface of the outer cylinder. The pipe protection device according to claim 1, wherein the pair of protrusions are fixed adjacent to the locking member between the pair of locking members on the outer surface of the pipe. The outer cylinder is supported around, the side lid member is fixed to an axial end of the outer cylinder, and the locking member is adjacent to the inner side of the side lid member on the inner surface of the outer cylinder. The pipe protection device according to claim 1, wherein the protrusion is fixed adjacent to the locking member on the outer surface of the pipe while being fixed.   2. The split outer cylinder according to claim 1, wherein a mounting flange as the mounting portion is formed at an end portion in a circumferential direction, the mounting flanges are in close contact with each other, and the mounting flange is fastened with bolts. 4. The piping protective device according to any one of 3 above.   The pipe protection device according to any one of claims 1 to 4, wherein the outer cylinder has a curved shape along the pipe having a curved shape.   The pipe protection device according to any one of claims 1 to 5, wherein a seal member is provided at one position where the locking member and the protrusion are opposed to each other.   An outer surface of the pipe is supported around a fixing member, the outer cylinder is provided with an opening through which the fixing member is inserted, and an opening edge of the opening is connected to the fixing member. The piping protection device according to any one of claims 1 to 6, wherein the piping protection device is characterized in that: One end portion in the axial direction of the pipe is supported by a surrounding support member, and one end portion of the outer cylinder is fixed to the support member, and the locking member is fixed to the other end portion. The piping protection device according to claim 3 . A nuclear facility that generates a high-temperature and high-pressure fluid by heat generated in a nuclear reactor and sends it through piping, and uses the fluid,
The pipe protection device according to any one of claims 1 to 8 is applied to the pipe.
Nuclear facilities characterized by that.

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