JP2016011724A - Pipeline protection device and nuclear facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress ejection of fluid to the surroundings of a pipeline and progression of rupture of the pipeline, in a pipeline protection device and a nuclear facility.SOLUTION: A pipeline protection device includes: an external cylinder 11 covering the outer periphery of a pipeline 106 where fluid circulates; side lid members 12, 13 forming a ring shape fixed to the end part in an axial direction of the external cylinder 11; and gap adjustment members 18, 19 provided in the side lid members 12, 13 and setting a gap amount to an outer peripheral surface of the pipeline 106 to a setting value.

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. And a gap adjusting member that is provided on the side lid member and sets a gap amount with the outer surface of the pipe to a specified value.

  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. In addition, since the outer cylinder has a gap amount between the end portion of the outer cylinder and the outer surface of the pipe set to a specified value by the side lid member and the gap adjusting member, the leakage of fluid from the end portion of the outer cylinder can be suppressed. . 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 piping protection device of the present invention, the side lid member and the gap adjusting member are fixed to one end and the other end in the axial direction of the outer cylinder, and are adjacent to the inside of the side lid member on the inner surface of the outer cylinder. Then, while the pair of locking members is fixed, the pair of protrusions are fixed adjacent to the locking member between the pair of locking members on the outer surface of the pipe.

  Therefore, when the side cover member, the gap adjusting member, and the locking member are fixed to each end of the outer cylinder, and the protrusion is fixed to each end on the outer surface of the pipe, the pipe breaks. The protruding portion of the pipe is locked to the locking member of the outer cylinder, the operation of separating the pipe from the rupture portion is prevented, and the progress of the rupture 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 and the gap adjusting member are fixed to an axial end of the outer cylinder, and the side of the inner surface of the outer cylinder is While the locking member is fixed adjacent to the inside of the lid member, the protrusion is fixed adjacent to the locking member on the outer surface of the pipe.

  Accordingly, the side cover member, the gap adjusting member, and the locking member are fixed to the end portion 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 of the pipe The part is locked to the locking member of the outer cylinder, the operation of separating the broken pipe is prevented, and the progress of the fracture in the pipe can be suppressed.

  In the pipe protection device of the present invention, the gap adjusting member is fixed to one end face of the side lid member.

  Therefore, by fixing the gap adjusting member to the end surface of the side lid member, the gap adjusting member can be easily fixed to the side lid member, and the assemblability can be improved.

  In the pipe protection device of the present invention, the gap adjusting member is fixed to an inner surface of the side lid member.

  Therefore, by fixing the gap adjusting member to the inner surface of the side lid member, the gap adjusting member does not protrude outward from the side lid member, and the appearance quality can be improved.

  In the piping protection device according to the present invention, the gap adjusting member includes an adjusting portion that is fixed to an outer end surface of the side lid member and that can adjust a gap amount with the outer surface of the pipe.

  Therefore, since the gap adjusting member has an adjusting portion that can adjust the gap amount with the outer surface of the pipe, the gap adjusting member can be made common to pipes having different outer diameters, and the part cost can be reduced. .

  In the pipe protection device of the present invention, the gap between the gap adjusting member and the pipe is set to be smaller than the gap between the side cover member and the pipe.

  Therefore, it is not necessary to design and manufacture the side cover member with high accuracy in accordance with the dimensions of the pipe, and the manufacturing cost can be reduced. Also, the gap between the inner surface of the gap adjusting member and the outer surface of the pipe is set small. Thus, 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 outer cylinder, the side cover member, and the gap adjusting member are configured by a plurality of divided portions that are divided in the radial direction.

  Therefore, the outer cylinder, the side cover member, and the gap adjusting member are configured by a plurality of divided parts, and the divided parts are assembled and fixed so as to cover the outside of the pipe, so that the outer cylinder and the side cover member are fixed to the pipe. And the gap adjusting member can be easily assembled, and the assembling property can be improved.

  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 of the outer cylinder, and a gap amount between the outer surface of the pipe is set to a specified value. Since the gap adjusting member is provided, when the pipe breaks, it is possible to suppress the ejection of fluid from the fractured portion to the surroundings, and to suppress the leakage of fluid from the end portion of the outer cylinder, and as a result It is possible to prevent the situation in which the fluid ejected from the piping affects the structures and devices around the piping and protect the structures and devices.

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 illustrating the pipe protection device of the second embodiment. FIG. 10 is a cross-sectional view illustrating a pipe protection device according to the third embodiment. FIG. 11 is a cross-sectional view illustrating the piping protection device of the fourth embodiment.

  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 high temperature and 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 a pair of side cover members 12. , 13, a pair of pressure receiving members (locking members) 14, 15, a pair of protrusions 16, 17, and a pair of gap adjusting members 18, 19.

  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 outer cylinder 11 is arranged so that each divided outer cylinder 11 a covers the outer periphery of the pipe 106, and a portion where the respective divided outer cylinders 11 a are abutted is welded to each other so as to be attached to the outside of the pipe 106. . 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 (split part) 12a. The first side lid member 12 is arranged so that each divided side lid member 12a covers the outer periphery of the pipe 106, and the portions where the respective divided side lid members 12a are abutted are welded to each other. Installed on the outside. 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, and the parts where the respective divided side lid members 13 a are abutted are welded together so that the pipe 106 Installed on the outside. 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 (divided portions) 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 (divided portions) 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 respective end portions in the axial direction at predetermined portions 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) divided projections (divided parts) 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 (in this embodiment, two) divided projections (divided portions) 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.

  The gap adjusting members 18 and 19 are provided in the pair of side lid members 12 and 13 and set the gap amount with the outer peripheral surface of the pipe 106 to a specified value. The gap adjusting members 18 and 19 are one end and the other end in the axial direction of the outer cylinder 11 and are attached to the outer end faces of the side cover members 12 and 13 and are formed in an annular shape. Yes. Therefore, the gap adjusting members 18 and 19 have an outer diameter set smaller than the outer diameter of the outer cylinder 11 and the side cover members 12 and 13, and an inner diameter set slightly larger than the outer diameter of the pipe 106.

  The first gap adjusting member 18 disposed in contact with the outer end face of the first side cover member 12 at one end of the outer cylinder 11 is divided in the circumferential direction because it needs to be attached to the outer peripheral side of the existing pipe 106 later. In addition, a plurality of (in this embodiment, two) divided gap adjusting members (divided portions) 18a are used. The first gap adjusting member 18 is arranged so that each divided gap adjusting member 18 a covers the outer periphery of the pipe 106, and the portions where the respective divided gap adjusting members 18 a are abutted are welded to each other so that the pipe 106 is joined. Installed on the outside. The first gap adjusting member 18 is fixed by welding with the end face of each divided gap adjusting member 18a contacting the outer end face of each divided side lid member 12a in the first side lid member 12.

  The second gap adjustment member 19 disposed in contact with the outer end face of 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, so that it is divided in the circumferential direction. A plurality of (in this embodiment, two) divided gap adjusting members (divided portions) 19a are formed. The second gap adjusting member 19 is arranged so that each divided gap adjusting member 19 a covers the outer periphery of the pipe 106, and the portions where the respective divided gap adjusting members 19 a are abutted are welded to each other, whereby the pipe 106 is joined. Installed on the outside. The second gap adjusting member 19 is fixed by welding with the end face of each divided gap adjusting member 19a contacting the outer end face of each divided side lid member 13a in the second side lid member 13.

  Therefore, as shown in detail in FIG. 8, when the outer cylinder 11, the side cover members 12, 13, the pressure receiving members 14, 15 and the gap adjusting members 18, 19 are assembled outside the pipe 106, the outer periphery of the pipe 106 Gaps G7 and G8 are secured between the surface and the inner peripheral surfaces of the gap adjusting members 18 and 19. In addition, each clearance gap adjustment member 18 and 19 is formed with the material which can maintain rigidity, for example, carbon steel.

  Since the outer cylinder 11 covers the outer periphery of the pipe 106 to prevent the fluid from flowing out to the outside when the pipe 106 is broken, the pipe protection device 10 is connected to each end of the outer cylinder 11 and the pipe 106. It is desirable to reduce the gap with the outer peripheral surface of the. However, since the pipe 106 receives the heat of the fluid flowing inside and expands outward, it is necessary to set a gap in consideration of the amount of thermal expansion of the pipe 106 during assembly. Therefore, the side cover members 12 and 13 fixed to the end of the outer cylinder 11 have relatively large gaps G1 and G2 between the inner peripheral surface and the outer peripheral surface of the pipe 106. The gap adjusting members 18 and 19 are fixed to the side lid members 12 and 13 to secure gaps G7 and G8 smaller than the gaps G1 and G2 between the inner peripheral surface and the outer peripheral surface of the pipe 106. The gap amount between the inner peripheral surface of the side lid members 12 and 13 (gap adjusting members 18 and 19) and the outer peripheral surface of the pipe 106 is set to a specified value. Therefore, a plurality of types of clearance adjustment members 18 and 19 having at least different inner diameters are prepared.

  That is, for the plural types of pipes 106 having different outer diameters, the outer cylinder 11, the side cover members 12, 13, and the pressure receiving members 14, 15 are made into mass-produced parts, and the plural types of pipes 106 having different inner diameters are used. The gap adjusting members 18 and 19 are prepared. When the pipe protection device 10 is attached to the pipe 106, the outer cylinder 11, the side cover members 12 and 13 and the pressure receiving members 14 and 15 are prepared as mass production parts, and the gap amount is appropriate with respect to the outer diameter of the pipe 106. The gap adjusting members 18 and 19 having a predetermined value are selected.

  As shown in FIG. 4, the pipe protection device 10 according to the present embodiment fixes the side cover members 12 and 13 and the gap adjustment members 18 and 19 to each end on the inner peripheral surface of the outer cylinder 11 that covers the outer periphery of the pipe 106. In addition, the pressure receiving members 14 and 15 are fixed to the inside thereof, and the protrusions 16 and 17 are fixed to the outer peripheral surface of the pipe 106 adjacent to the inside of the pressure receiving members 14 and 15. That is, as shown in FIG. 8, the pipe protection device 10 has an outer cylinder 11 disposed outside the pipe 106, and side cover members 12, 13, gap adjustment members 18, 19 and pressure receiving at each end of the outer cylinder 11. The members 14 and 15 are fixed, and the protrusions 16 and 17 are fixed adjacent to the pressure receiving members 14 and 15 on the outer peripheral surface of the pipe 106. 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 an intermediate portion in the axial direction of the pipe 106, and a support column 21 b A connecting member (pad) 21c that connects the pipe 106 may be provided, and a reinforcing connecting member (for example, a flange) may be provided 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 fluid flows out from the breakage portion (breakage position F), the pipe 106 remains in the space portion S covered with the outer cylinder 11, the side lid members 12 and 13, and the gap adjustment members 18 and 19. As a result, the ejection of fluid to the outside of the outer cylinder 11 is suppressed. At this time, the outer cylinder 11 has the side cover members 12 and 13 and the gap adjusting members 18 and 19 fixed to each end, and the gap between the inner peripheral surface of the gap adjusting members 18 and 19 and the outer peripheral surface of the pipe 106 is defined. It is a value. Therefore, the fluid in the space S is prevented from leaking outside through this gap as much as possible. 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 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. Gap adjustment members 18 and 19 are provided that set the gap amount between the members 12 and 13 and the side cover members 12 and 13 to the outer peripheral surface of the pipe 106 to a specified value.

  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. In addition, since the outer cylinder 11 has the end portion of the side cover members 12, 13 and the gap adjustment members 18, 19, the gap amount between the outer peripheral surface of the pipe 106 is set to a specified value, The leakage of fluid 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.

  In the piping protection device according to the first embodiment, the side cover members 12 and 13 and the gap adjusting members 18 and 19 are fixed to one end and the other end in the axial direction of the outer cylinder 11, and the side on the inner peripheral surface of the outer cylinder 11. A pair of pressure receiving members 14 and 15 are fixed adjacent to the inside of the lid members 12 and 13, 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 11. ing.

  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 piping protection device of the first embodiment, the gap adjusting members 18 and 19 are fixed to the outer end surfaces of the side lid members 12 and 13. Therefore, the gap adjusting members 18 and 19 can be easily fixed to the side lid members 12 and 13, and the assemblability can be improved.

  In the pipe protection device of the first embodiment, the gaps G7 and G8 between the gap adjusting members 18 and 19 and the pipe 106 are set smaller than the gaps G1 and G2 between the side cover members 12 and 13 and the pipe 11. Therefore, it is not necessary to design and manufacture the side cover members 12 and 13 with high accuracy in accordance with the dimensions of the pipe 106, the manufacturing cost can be reduced, and the inner surfaces of the gap adjusting members 18 and 19 and the pipe 106 can be reduced. By setting the gaps G7 and G8 with the outer surface small, the leakage of fluid from the end of the outer cylinder 11 to the outside can be prevented.

  In the piping protection device according to the first embodiment, the outer cylinder 11 is constituted by a plurality of divided outer cylinders 11a divided in the radial direction, and the side lid members 12, 13 are divided in the radial direction by a plurality of divided side lid members 12a. 13a, the pressure receiving members 14, 15 are constituted by a plurality of divided pressure receiving members 14a, 15a divided in the radial direction, and the gap adjusting members 18, 19 are divided by a plurality of divided gap adjusting members 18a divided in the radial direction. , 19a. Accordingly, the divided outer cylinder 11a, the divided side cover members 12a and 13a, the divided pressure receiving members 14a and 15a, and the divided gap adjusting members 18a and 19a are assembled and fixed so as to cover from the outside of the pipe 106. Thus, the outer cylinder 11, the side cover members 12, 13, the pressure receiving members 14, 15, and the gap adjusting members 18, 19 can be easily assembled, and the assemblability can be improved.

  In the pipe protection device according to the first embodiment, the outer peripheral surface of the pipe 11 is supported by the surrounding support member 22 via the fixing member 21, and the opening 23 through which the fixing member 21 is inserted is provided in 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. 9 is a cross-sectional view of the pipe extending direction in the pipe protection device of the second embodiment. 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 FIG. 9, the pipe protection device 30 is provided outside the pipe 106 having a circular cross section, and includes an outer cylinder 31, a side lid member 32, a pressure receiving member ( (Locking member) 33, projecting portion 34, and gap adjusting member 35. Here, one end of the pipe 106 in the extending direction is inserted into a through hole 42 formed in the wall (support member) 41 and is fixed to the wall 41 by a fixing member (not shown).

  The outer cylinder 31 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 31 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 wall portion 41 is fixed with an annular mounting base 43 around the through hole 42. The outer cylinder 31 has a mounting flange 31a formed integrally (or separately or made of sheet metal) at one end in the axial direction. The mounting flange 31a is in close contact with the mounting base 43 and fixed by a plurality of bolts 44. Yes. Therefore, when the outer cylinder 31 is assembled outside the pipe 106, a space S is secured between the outer peripheral surface of the pipe 106 and the inner peripheral surface of the outer cylinder 31.

  The side cover member 32 is attached to the other end portion of the outer cylinder 31 in the extending direction, and is formed in an annular shape. The side cover member 32 is set to have an outer diameter that is substantially the same as the outer diameter of the outer cylinder 31, and an inner diameter that is slightly larger than the outer diameter of the pipe 106. The side lid member 32 contacts the other end surface of the outer cylinder 31 and is fixed by welding.

  The pressure receiving member 33 is attached to the other end portion of the outer cylinder 31 in the extending direction, and is formed in an annular shape. The pressure receiving member 33 is set to have an outer diameter substantially the same as the inner diameter of the outer cylinder 31, and the inner diameter is set slightly larger than the outer diameter of the pipe 106. The pressure receiving member 33 is fixed to the inner peripheral surface of the outer cylinder 31 and one surface of the side lid member 32.

  The protrusion 34 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 34 is fixed to the other end portion in the axial direction at a predetermined portion of the pipe 106 covered with the outer cylinder 31. Specifically, the protrusion 34 is disposed on the wall 41 side of the pressure receiving member 33 on the outer peripheral surface of the pipe 106 and adjacent to the pressure receiving member 33. The protrusion 34 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 31.

  The gap adjusting member 35 is provided in the side cover member 32 and sets the gap amount with the outer peripheral surface of the pipe 106 to a specified value. The gap adjusting member 35 is one end portion in the axial direction of the outer cylinder 31 and is attached to the outer end surface of the side lid member 32, and is formed in an annular shape. Therefore, the outer diameter of the gap adjusting member 35 is set smaller than the outer diameter of the outer cylinder 31 or the side cover member 32, and the inner diameter is set slightly larger than the outer diameter of the pipe 106. The gap adjusting member 35 is fixed to the side lid member 32, thereby setting the gap amount between the inner peripheral surface of the side lid member 32 (gap adjusting member 35) and the outer peripheral surface of the pipe 106 to a specified value. Therefore, a plurality of types of clearance adjustment members 35 having at least different inner diameters are prepared.

  In the pipe protection device 30 of the present embodiment, the side cover member 32 and the gap adjusting member 35 are fixed to the other end portion of the inner peripheral surface of the outer cylinder 31 that covers the outer periphery of the pipe 106 whose one end portion is supported by the wall portion 41. At the same time, the pressure receiving member 33 is fixed to the inside thereof, while the protrusion 34 is fixed to the outer peripheral surface of the pipe 106 adjacent to the inside of the pressure receiving member 33.

  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 portion 41, the other side (left side) tends to move in the direction of arrow C. At this time, since the protruding portion 34 comes into contact with the pressure receiving member 33 and is locked, the pipe 106 is prevented from moving the broken pipe 106. Therefore, although the fluid flows out from the fracture portion (rupture position F), the pipe 106 remains in the space portion S covered by the outer cylinder 31, the side lid member 32, and the gap adjustment member 35, and the outside The ejection of fluid to the outside of the cylinder 31 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 of the second embodiment, the outer cylinder 31 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 31. A gap adjusting member 35 is provided, which is provided in the member 32 and the side lid member 32 and sets the gap amount between the outer peripheral surface of the pipe 106 to a specified value.

  Therefore, since the outer periphery is covered with the outer cylinder 31 when the pipe 106 is broken, the fluid ejected from the fractured portion is blocked by the outer cylinder 31, and the ejection of the fluid around the pipe 106 is suppressed. be able to. Moreover, since the outer cylinder 31 has a gap amount between the end portion of the outer tube 31 and the outer peripheral surface of the pipe 106 set by the side cover member 32 and the gap adjusting member 35, the leakage of fluid from the end portion of the outer cylinder 31. 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.

  In the pipe protection device according to the second embodiment, one end of the outer cylinder 31 is supported by the wall 41, and the side cover member 32 and the gap adjusting member 35 are fixed to the other end of the outer cylinder 31, and the outer cylinder 31. The pressure receiving member 33 is fixed adjacent to the inner side of the side lid member 32 on the inner surface of the pipe 106, while the protrusion 34 is fixed adjacent to the pressure receiving member 33 on the outer surface of the pipe 106. When the pipe 106 is broken, the fluid ejected from the broken portion of the pipe 106 can be blocked by the outer cylinder 31, and the protruding portion 34 of the pipe 106 is locked to the pressure receiving member 33 of the outer cylinder 31 to break the pipe. The movement to the other end side of 106 can be prevented, the ejection of fluid around pipe 106 can be suppressed, and the progress of breakage in pipe 106 can be suppressed.

  In the second embodiment, the pipe protection device 30 is provided for the pipe 106 whose one end is supported by the wall 41. However, as in the first embodiment, the outer peripheral surface is supported by a surrounding support member. A pipe protection device 30 may be provided for the pipe 106.

[Third Embodiment]
FIG. 10 is a cross-sectional view illustrating a pipe protection device according to the third embodiment. 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 FIG. 10, the pipe protection device 50 is provided outside the pipe 106 having a circular cross section, and includes an outer cylinder 11, side lid members 12 and 13, and pressure receiving pressure. Members 14 and 15, protrusions 16 and 17, and gap adjusting members 51 and 52 are provided. Here, since the outer cylinder 11, the side cover members 12, 13, the pressure receiving members 14, 15, and the protrusions 16, 17 are the same as those in the first embodiment described above, the description thereof is omitted.

  The gap adjusting members 51 and 52 are provided on the inner peripheral surfaces of the side lid members 12 and 13 and set the gap amount with the outer peripheral surface of the pipe 106 to a specified value. The gap adjusting members 51 and 52 are attached to the inner peripheral surfaces of the side lid members 12 and 13, and a single product has a flat plate shape with a predetermined length and width, and has an annular shape when attached. The gap adjusting members 51 and 52 are fixed to the inner peripheral surface of the side lid members 12 and 13, so that the inner peripheral surface of the side lid members 12 and 13 (gap adjusting members 51 and 52) and the outer peripheral surface of the pipe 106 are arranged. Set the gap amount to the specified value. Therefore, one or a plurality of gap adjusting members 51 and 52 are mounted in a stacked manner.

  That is, by fixing the side cover members 12 and 13 to the outer cylinder 11 with respect to the pipe 106, gaps G 1 and G 2 are formed between the inner peripheral surface of the side cover members 12 and 13 and the outer peripheral surface of the pipe 106. Secured. A predetermined number of gaps G7 and G8 are set by fixing a predetermined number of gap adjustment members 51 and 52 to the inner peripheral surfaces of the side lid members 12 and 13. In this case, the gap adjusting members 51 and 52 are fixed to the inner peripheral surfaces of the side lid members 12 and 13 by welding or adhesion.

  Therefore, when the pipes 106 are broken, the pipes 106 try to be separated from each other starting from the broken part. At this time, since the protruding portions 16 and 17 abut on the pressure receiving members 14 and 15 and the piping 106 is locked, the movement of the broken piping 106 is prevented. Therefore, although the fluid flows out from the broken portion in the pipe 106, the fluid remains in the space portion S covered with the outer cylinder 11, the side cover members 12 and 13, and the gap adjusting members 51 and 52. The ejection of the fluid to the outside of 11 is suppressed.

  As described above, in the pipe protection device according to the third 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 end of the outer cylinder 11 in the axial direction. Gap adjustment members 51 and 52 are provided on the inner peripheral surfaces of the members 12 and 13 and set on the inner peripheral surfaces of the side cover members 12 and 13 to set the gap amount between the outer peripheral surfaces of the pipes 106 to a specified value.

  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. In addition, since the outer cylinder 11 is set to have a predetermined clearance from the outer peripheral surface of the pipe 106 by the side cover members 12 and 13 and the gap adjusting members 51 and 52, the end of the outer cylinder 11 starts from the end of the outer cylinder 11. The leakage of fluid can be suppressed. Further, by fixing the gap adjusting members 51 and 52 to the inner surfaces of the side lid members 12 and 13, the gap adjusting members 51 and 52 do not protrude outward from the side lid members 12 and 13, and the appearance quality is improved. can do.

[Fourth Embodiment]
FIG. 11 is a cross-sectional view illustrating the piping protection device of the fourth embodiment. 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 fourth embodiment, as shown in FIG. 11, the pipe protection device 60 is provided outside the pipe 106 having a circular cross section, and includes an outer cylinder 11, side lid members 12 and 13, and pressure receiving pressure. Members 14 and 15, protrusions 16 and 17, and gap adjusting members 61 and 62 are provided. Here, since the outer cylinder 11, the side cover members 12, 13, the pressure receiving members 14, 15, and the protrusions 16, 17 are the same as those in the first embodiment described above, the description thereof is omitted.

  The gap adjusting members 61 and 62 are provided on the outer end surfaces of the side lid members 12 and 13 and set the gap amount with the outer peripheral surface of the pipe 106 to a specified value. The gap adjusting members 61 and 62 are fixed to the end surfaces of the side lid members 12 and 13 by welding, so that the inner peripheral surface of the side lid members 12 and 13 (gap adjusting members 61 and 62) and the outer peripheral surface of the pipe 106 are Set the gap amount to the specified value. The gap adjustment members 61 and 62 have adjustment portions 63 and 64 that can adjust the gap amount with the outer peripheral surface of the pipe 106.

  That is, the gap adjusting members 61 and 62 have an annular shape, and adjustment portions 63 and 64 that form a ring shape along the outer peripheral surface of the pipe 106 are integrally provided on the outer end surface. When the outer cylinder 11, the side cover members 12 and 13, the pressure receiving members 14 and 15, and the gap adjustment members 61 and 62 are fixed to the pipe 106, the adjustment portions 63 and 64 of the gap adjustment members 61 and 62 are As shown by a two-dot chain line in FIG. 11, the pipe 106 is parallel to the outer peripheral surface. Here, the adjusting parts 63 and 64 are heated by a jig (not shown) and deformed so that the tip part approaches the outer peripheral surface of the pipe 106, thereby adjusting the parts 63 and 64 as shown by a solid line in FIG. Gaps G7 and G8 are secured between the other end of the pipe and the outer peripheral surface of the pipe 106.

  Therefore, when the pipes 106 are broken, the pipes 106 try to be separated from each other starting from the broken part. At this time, since the protruding portions 16 and 17 abut on the pressure receiving members 14 and 15 and the piping 106 is locked, the movement of the broken piping 106 is prevented. Therefore, although the fluid flows out from the broken portion in the pipe 106, this fluid remains in the space portion S covered with the outer cylinder 11, the side cover members 12 and 13, and the gap adjusting members 61 and 62, and the outer cylinder The ejection of the fluid to the outside of 11 is suppressed.

  As described above, in the pipe protection device according to the fourth 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 end of the outer cylinder 11 in the axial direction. Gap adjustment members 61 and 62 that are provided on the side cover members 12 and 13 and set the gap amount between the outer peripheral surface of the pipe 106 to a specified value are provided. The gap adjustment members 61 and 62 are pipes. It has the adjustment parts 63 and 64 which can adjust the gap | interval amount with the outer peripheral surface of 106.

  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. In addition, since the outer cylinder 11 has a gap amount between the outer lid surface of the pipe 106 set to a specified value by the side lid members 12 and 13 and the gap adjusting members 61 and 62, the end of the outer cylinder 11 starts from the end of the outer cylinder 11. The leakage of fluid can be suppressed. Further, since the gap adjusting members 61 and 62 have the adjusting portions 63 and 64, the gap adjusting members 61 and 62 can be made common to the pipes 106 having different outer diameters, and the component cost can be reduced.

  In the first, second, and fourth embodiments described above, the gap adjusting members 18, 19, 35, 61, 62 are fixed to the outer end surfaces of the side cover members 12, 13, 32, but are fixed to the inner end surfaces. May be. Further, although the gap adjusting members 18, 19, 35, 61, 62 are set as one set, a plurality of gap adjusting members may be provided.

  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, 30, 50, 60 Piping protection device 11, 31 Outer cylinder 12, 13, 32 Side cover member 14, 15, 33 Pressure receiving member (locking member)
16, 17, 34 Protrusion 18, 19, 35, 51, 52, 61, 62 Gap adjustment member 63, 64 Adjustment part 21 Fixing member 22 Support member 41 Wall part (support member)
42 Through hole 106 Piping

Claims (11)

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 gap adjusting member that is provided on the side lid member and sets a gap amount with the outer surface of the pipe to a specified value;
A piping protection device characterized by comprising:   The side lid member and the gap adjusting member are fixed to one end and the other end in the axial direction of the outer cylinder, and a pair of locking members are adjacent to the inside of the side lid member on the inner surface of the outer cylinder. The pipe protection device according to claim 1, wherein a pair of protrusions are fixed adjacent to the locking member between the pair of locking members on the outer surface of the pipe while being fixed.   The outer cylinder is supported around, the side lid member and the gap adjusting member are fixed to an axial end of the outer cylinder, and adjacent to the inner side of the side lid member on the inner surface of the outer cylinder. The piping protection device according to claim 1, wherein the locking member is fixed, and the protrusion is fixed adjacent to the locking member on the outer surface of the pipe.   The piping protection device according to claim 2, wherein the gap adjusting member is fixed to one end surface of the side lid member.   The pipe protection device according to claim 2, wherein the gap adjusting member is fixed to an inner surface of the side lid member.   The pipe clearance according to claim 2 or 3, wherein the gap adjustment member has an adjustment portion that is fixed to an outer end surface of the side cover member and that can adjust an amount of the gap with the outer surface of the pipe. apparatus.   The pipe protection device according to any one of claims 1 to 6, wherein a gap between the gap adjusting member and the pipe is set smaller than a gap between the side cover member and the pipe. .   The piping according to any one of claims 1 to 7, wherein the outer cylinder, the side lid member, and the gap adjusting member are configured by a plurality of divided portions that are divided in a radial direction. Protective device.   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 2 to 8, wherein the piping protection device is characterized.   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 protective device according to any one of claims 3 to 8. 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 10 is applied to the pipe.
Nuclear facilities characterized by that.

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