• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a valve (1) comprising: - a housing (100) forming an enclosure (101) inside which a fluid is intended to flow and having at least one inlet (102) and at least one outlet (103) of the fluid, - a shutter (201) configured to cooperate with a seat (104) integral with the housing (100) for closing at least the inlet (102) or at least the outlet (103) of the fluid, - a shutter position control device (201) with respect to the seat (104) in which - the control device comprises at least one inductor (113) and at least one armature (202) magnetically coupled and configured so that the inductor (113) causes the armature (202) to rotate so as to selectively cause the shutter (201) to move closer to or away from the seat (104), - the inductor (113) is fixed relative to the casing (100), the armature (202) is located inside the enclosure (101) and is fixed relative to a screw (203) carrying the shutter (201), the screw (203) being configured to cooperate with a nut (105) integral with the casing (100) so as to transform a rotation of the armature (202) into a translation shutter (201).
    公开号:FR3014994A1
    申请号:FR1362929
    申请日:2013-12-18
    公开日:2015-06-19
    发明作者:Pascal Taraud；Arnaud Delabergerie；Olivier Gastaldi；Patrice Pennel
    申请人:REG Technology；Commissariat a lEnergie Atomique CEA；Commissariat a lEnergie Atomique et aux Energies Alternatives CEA；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD OF THE INVENTION The invention relates generally to the field of valves. It applies particularly advantageously to valves for the circulation of liquid metal, such as liquid sodium, raised to a high temperature and can for example reach 450 ° C. The invention has as a preferred field of application nuclear power and more specifically the operation of fast neutron reactors with a heat transfer medium. STATE OF THE ART 4th generation heat transfer reactors, such as the Advanced Sodium Technological Reactor for Industrial Demonstration (ASTRID) reactor, use a liquid metal, usually sodium, as coolant. This coolant, in addition to having a very high temperature, typically greater than 400 ° C, is generally chemically very reactive.
    [0002] It is therefore essential to ensure as reliable a seal as possible throughout the course of the fluid and particularly at the valves. To control the circulation of sodium, several types of valves have been developed. These sodium valves provide a shutter configured to cooperate with a seat to prevent the flow of liquid sodium. A control device has a steering wheel, motorized or manual, connected by a rod movable to the shutter and whose actuation selectively move the shutter away from or closer to the seat. In order to seal, a first type of sodium valve provides a solidified sodium seal. In this type of sodium valve, a portion of the valve in contact with the movable rod is configured to receive liquid sodium and lower its temperature. In this portion, sodium solidifies and seals outward. Other sealing members such as seals are also provided. This type of valve has the particular drawback of requiring a complex system for maintaining the actuating device and the sealing system. The actuating device and the sealing system form a large mass. In addition, this large mass is relatively remote from the pipe which increases the risk of rupture especially in case of earthquake. To reduce the risk of rupture, complex and expensive maintenance systems are now used. A second type of sodium valve provides a seal based on a bellows.
    [0003] In this type of sodium valve, the rod is equipped with a bellows forming a barrier for the passage of liquid sodium.
    [0004] This valve makes it possible to reduce somewhat the offset between the piping and the actuating and sealing device, although this offset does not disappear. However, this type of valve involves many mechanical parts, subject to wear and thus has a limited reliability.
    [0005] There is therefore a need to provide a valve to reduce or even eliminate at least one of the disadvantages of known valves for liquid sodium. The present invention aims to meet this need. More specifically, the present invention aims to reduce the complexity of the holding systems of the control devices and sealing existing sodium valves and / or improve the reliability of their sealing. SUMMARY OF THE INVENTION To achieve this objective, one aspect of the present invention relates to a valve comprising: - a casing forming an enclosure within which a fluid is intended to flow and having at least one inlet and at least one a fluid outlet, - a shutter configured to cooperate with a seat integral with the housing to close at least one inlet or at least one outlet of the fluid, - a device for controlling the position of the shutter relative to the seat. Preferably, the control device comprises at least one inductor and at least one magnetically coupled armature and configured so that the inductor moves the armature in displacement, preferably in rotation, so as to selectively cause the approximation or the removal of the shutter relative to the seat.
    [0006] Preferably, the armature is located inside the enclosure and is integral with a screw carrying the shutter, the screw being configured to cooperate with a nut secured to the housing so as to transform. a rotation of the armature in a translation of the shutter. Preferably, the screw is hollow and the valve is configured so that the fluid flows at least partly inside the screw.
    [0007] Thus, the shutter is moved thanks to the armature which is located inside the enclosure. The control force is transmitted without a mechanical connection between an external actuator and the shutter. This significantly reduces sealing requirements compared to existing liquid sodium valves which are sealed with a solidified sodium gasket or bellows. In addition, this valve structure has a greatly reduced number of parts. Only one organ translate with respect to the crankcase. This member comprises in particular the armature, the screw secured to the armature and the shutter carried by the screw. The robustness and reliability of the valve seal are thus considerably improved compared to existing sodium valves.
    [0008] The valve according to the invention also has other advantages. In particular, the device for controlling the position of the shutter is disposed in the immediate vicinity of the enclosure with respect to the inductor and within the enclosure itself with regard to the armature. The invention thus makes it possible to reduce the offset of the control device. As a reminder, existing sodium valves, whose seal is based on a solidified sodium gasket or on a bellows, require a force transmission rod between the shutter and a manual or motorized flywheel. In addition, despite the usually complex maintenance systems in place, mass deportation inevitably increases the risk of rupture in the event of an earthquake. The invention therefore provides a significant advantage for applications in which safety is a fundamental issue such as nuclear. Furthermore, by providing a nut carried by the housing and a hollow screw inside which the fluid flows, the valve according to the invention can significantly reduce the losses. In addition it allows high flow rates for limited space compared to existing valves for liquid metal. Typically, for an application with liquid sodium, the valve according to the invention allows a fluid velocity that can exceed 10 meters per second. It is thus perfectly adapted to fast neutron reactors with sodium heat transfer. In addition, by providing an integral armature of the screw, the invention avoids the risk of seizure between armature and screw relative to a solution in which the armature and the screw would not be secured. The invention also has a cost price significantly reduced compared to existing sodium valves.
    [0009] Optionally, the invention may further have at least any of the following features which may be considered separately or in combination: Preferably, the inductor is stationary relative to the housing. Preferably, the inductor is integral with the housing. This embodiment will be preferred when the inductor comprises at least one coil. Alternatively the inductor is rotated if it includes only permanent magnets. Advantageously, the valve is configured so that the screw is embedded in the fluid. - Preferably, the valve is configured so that the main flow of the fluid takes place by the inside of the screw. Preferably, it is configured so that all the fluid flows through the inside of the screw. - Preferably, the casing has a wall forming the enclosure. Advantageously, the inductor and the armature are arranged on either side of the wall forming the enclosure. - Preferably, the nut is carried by an inner face of the wall. - Preferably, the housing has a cylindrical wall. Advantageously, the thread of the nut is carried by the cylindrical wall. Advantageously, the inductor is located outside the enclosure. This makes it possible to eliminate any liquid tightness constraint with respect to the inductor. Preferably, the inductor. is located on an outer face of the housing wall. Advantageously, the valve is configured so that all the fluid flows through the inside of the screw. Preferably, the screw has an inner wall which at least partially forms a flow chamber so that all the fluid flows inside the screw. Preferably, the screw has an inner wall which completely delimits, on at least one longitudinal portion of the enclosure, the flow chamber. - Advantageously, the enclosure is waterproof. The fluid can not escape from the enclosure except the input and output. He is not in contact with the atmosphere. - Preferably, the screw has an outer face which is disposed opposite the inner face of the housing wall and which has a thread configured to cooperate with the nut. Advantageously, the wall of the housing has an internal face of which at least one portion is cylindrical and the screw has an inner wall of which at least one portion is cylindrical and in which the ratio of the diameter of the inner wall of the screw to the diameter of the the internal face of the housing wall at the level of the cooperation between the screw and the nut, and more precisely at the thread of the screw, is greater than 0.6 and preferably greater than 0.7 and preferably greater than 0.85. Typically, it is between 0.7 and 0.9. This allows for high throughput for limited footprint. Advantageously, the cooperation between the screw and the nut forms a connection of the ball screw type. This reduces galling and wear of the parts, thereby improving the robustness and reliability of the valve. - According to a particularly advantageous embodiment, the ball screw is configured to be irreversible, so that a thrust force applied to the shutter, at least in the direction tending to move the shutter from the seat, does not not allow to drive the rotating screw in this direction. Thus, even if the fluid pressure is large and even if no torque is applied by the inductor on the armature, the screw can not be rotated and thus does not move the shutter from its seat. Only a rotation applied to the screw can do that. This feature further improves the safety and reliability of the valve since even in the event of a failure of the controller, the valve will maintain its closed position. This improvement in safety is particularly advantageous when the valve is integrated in a nuclear reactor circuit. Advantageously, the casing forms a monolithic piece. It is not formed of parts secured together by screws and flanges. This considerably increases the robustness and reliability of the valve, which is a considerable advantage since fluid leaks can cause serious damage, which is the case with liquid sodium. - Preferably, the housing is metal. - Preferably, it is formed only parts welded to each other. - Preferably, the screw is metal. - Preferably, the shutter is articulated in free rotation on the screw at least around the translation axis of the screw. This reduces or even eliminates the friction between the shutter and the seat when closing the valve. The wear of the shutter and the seat are thus considerably limited. - Preferably, the mechanical connection between the casing on the one hand and the other by the screw is provided solely by the cooperation between the screw and the nut. Thus, there is no bearing between the movable member and the casing, other than any balls of a ball screw system forming the cooperation between the screw and the nut. The invention thus eliminates all the sealing stresses that may be encountered between the bearings and the fluid. - Advantageously, the valve comprises a casing secured to the screw and which cooperates with the screw to form a sealed housing for receiving the armature. Thus, the armature is disposed in a sealed housing. The casing and the screw being integral with each other, the seal between these two parts is a static seal, which further simplifies the valve and increases its reliability. In this preferred embodiment, the valve does not require any seal within the enclosure. The only seal that is inevitably necessary between the valve and the pipes to be connected to the inlet and outlet of the valve. Thus, the seal of the valve is provided only by the enclosure. According to an alternative embodiment, the armature is placed facing the inner wall of the casing, and seals in contact with the inner wall of the casing and the screw or the armature are positioned on either side. of the armature in the direction of translation of the screw and are configured to prevent the fluid from reaching the armature. In another embodiment, a protective layer integral with the armature covers the latter. It is arranged between the armature and the inner face of the housing. - Preferably, the housing extends mainly in a longitudinal direction corresponding to the translation direction of the screw and at least one of the inlet and the outlet is shaped so as to form a low point of the enclosure to least for a position of the valve in which its longitudinal direction is arranged horizontally. Thus, even in horizontal position, the valve does not have a fluid retention point. This is particularly advantageous, to drain the valve or to prevent the fluid undergoes transformations detrimental to the proper functioning of the device, the invention thus prevents the retention of liquid sodium becomes soda after solidification. - Preferably, the casing extends mainly in a longitudinal direction corresponding to the direction of translation of the screw and has at least one of the input and the output which is offset with respect to the direction of translation of the screw . - The driving of the screw is carried out solely by the magnetic force of the control device. - The control device forms an electric motor whose rotor is secured to the screw. According to one embodiment, the control device comprises permanent magnets. This reduces the size of the valve. In a combined or alternative manner, the control device comprises coils. This reduces the cost of the valve.
    [0010] Another aspect of the present invention relates to a control system for the circulation of a liquid metal comprising a metal pipe and a valve according to the invention, the housing and the screw being made of metal and the valve being welded to the pipe. Another aspect of the present invention relates to a use of the valve according to the invention for controlling a fluid having a temperature greater than or equal to 350 ° C and preferably greater than or equal to 400 ° C. Preferably, the fluid is a metal in the liquid state. Preferably, the liquid is liquid sodium.
    [0011] Other objects, features and advantages of the present invention will become apparent from the following description and accompanying drawings. It is understood that other benefits may be incorporated.
    [0012] BRIEF DESCRIPTION OF THE FIGURES The objects, objects, as well as the features and advantages of the invention will become more apparent from the detailed description of an embodiment thereof which is illustrated by the following accompanying drawings in which: FIG. 1 is a longitudinal sectional view of a valve according to a non-limiting example of the invention, the valve being in the open position. FIGURE 2 is a longitudinal sectional view of the valve illustrated in FIG. 1, the valve being in the closed position. FIGURE 3 is a radial sectional view of a valve according to another non-limiting example of the invention, the section being taken at the level of the inductor and the armature. The drawings are given by way of examples and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily at the scale of practical applications. In particular the relative dimensions and thicknesses of the different parts, walls and bodies are not representative of reality. DETAILED DESCRIPTION OF THE INVENTION With reference to FIGS. 1 and 2, a nonlimiting example of a valve 1 according to the invention will now be described.
    [0013] The valve 1 comprises a housing 100 forming an outer jacket and which defines an enclosure 101 inside which the fluid is intended to flow. The casing 100 has in this nonlimiting example, an inlet 102 and an outlet 103. With the exception of the inlet 102 and the outlet 103, the enclosure 101 is sealed. The casing 100, at the inlet 102 and the outlet 103, forms ends to be welded for cooperation with a pipe element for fluidically connecting the valve 1 to a fluid network or flanges. In the context of an application to sodium-cooled nuclear reactors, the ends are preferably welded to sodium circuit lines. The valve 1 also comprises a movable member 200 inside the casing 100.
    [0014] Advantageously, this movable member 200 is entirely housed inside the enclosure 101. It is movable in translation inside the casing 100. Preferably, the enclosure 101 extends mainly in a longitudinal direction 2, corresponding to the translation axis referenced 2 of the movable member 200. The movable member 200 has a shutter 201 for cooperating with a complementary seat area 104 and integral with the casing 100. Preferably, the seat 104 is formed by the housing wall 100 which defines the enclosure 101. When the shutter 201 is applied against the seat 104, it obstructs the passage of the fluid and when it is away from the seat 104, it allows the flow of fluid. The position of the shutter 201 with respect to the seat 104 thus makes it possible to control the flow of the fluid. In the nonlimiting example illustrated, the seat 104 is disposed near the entrance 102. A displacement of the movable member 200 in the direction of the arrow illustrated in Figures 1 and 2 (ie a displacement going from the entry 102 to the exit 103) causes the shutter 201 to move away from the seat 104 to reach the opening configuration illustrated in FIG. 1. Conversely, a displacement of the shutter 201 in the opposite direction of the arrow (that is to say a displacement from the exit 103 to the entry 102) causes the closing of the shutter 201 relative to the seat 104 to reach the closure configuration illustrated in FIG. 2 The movable member 200 comprises or is formed by a screw 203. This screw 203 is configured to cooperate with a complementary surface secured to the housing 100. Preferably, the screw 203 has an outer face 205 carrying a shaped thread 204 to cooperate with a complementary thread 108 carried by an inner face 107 of a wall of the casing 100. According to a particular embodiment, the threads 108 and 204 are in direct contact with the fluid. The movable member 200 thus forms with the casing 100 a screw / nut connection. The axis of translation and rotation of this connection is the axis 2 illustrated in Figures 2 and 3. Preferably, this connection screw / nut is ball screw type 109 which reduces the risk of seizure. The rotation in a first direction of the screw 203 thus removes the shutter 201 from the seat 104 and the rotation of the screw 203 in a second direction brings the shutter 201 close to the seat 104. In a particularly advantageous manner, the screw 203 is controlled by a magnetic control device. An inductor 113 magnetically drives an armature 202 secured to the movable member 200. According to a first embodiment, preferred and illustrated in the figures, the armature 202 and the movable member 200 form separate pieces fixed to each other. 'other. According to an alternative embodiment, the armature 202 is formed by the screw 203. Thus in this embodiment, the material or materials of the latter are selected so that the screw 203 act as an armature. Thus, screws and armatures form a monolithic piece.
    [0015] In operation, the armature 202 is located and evolves inside the enclosure 101. Advantageously, the inductor 113 is arranged outside the casing 100, thereby reducing the sealing stresses. More specifically, the inductor 113 and the armature 202 are disposed on either side of the wall forming the enclosure 101 inside which the fluid flows. According to one embodiment, the control device thus forms an electric motor. Typically at the level of the inductor 113 at least, the outer face 106 of the wall is cylindrical and the inductor 113 surrounds this wall. Preferably, the inner face 107 of the wall is also cylindrical and surrounds the armature 202 with a very small operating clearance so as to allow the armature 202 to rotate inside the wall forming the enclosure 101. The control device causing the displacement of the shutter 201 is therefore particularly compact. It does not require a complex maintenance system. In addition, it considerably reduces the distance the mass transfer or even does not have a mass remote from the piping. The invention thus considerably simplifies the valve 1 and improve its reliability as well as safety in case of major shock or earthquake. In an advantageous embodiment not shown, the armature 202 is carried by the movable member 200 being covered by a casing which separates the armature 202 of the fluid. Preferably, the movable member 200 comprises a housing 207 configured to receive the armature 202 and the envelope defines a closed and sealed volume inside the housing 207. This seal is static, since in operation the envelope is integral with the movable member 200. The sealing of the armature 202 is thus provided in a particularly simple and effective manner. In another embodiment, the armature 202 is encapsulated in a protective layer. It is covered by a protective layer which isolates it from the fluid. Preferably, this protective layer is a steel film, usually referred to as "liner". In another embodiment, such as that illustrated in FIGS. 1 and 2, the armature 202 is disposed directly opposite the internal face 107 of the wall of the casing 100. In order to protect this armature, it can be encapsulated in a protective layer, in the same way as the previous mode. Alternatively, seals may be arranged between the movable member 200 and the inner face 107 of the housing wall 100 being distributed on either side of the armature 202 along the axis of translation of the screw 203. From preferably, the seals are housed in the cavities 209.
    [0016] Preferably, the movable member 200 has an internal passage for the flow of the fluid. Thus, the screw 203 is hollow. Preferably, all the fluid flows through this passage. According to a particularly advantageous embodiment, the movable member 200 has on a longitudinal portion at least, a substantially cylindrical shape. This portion comprises the external thread 204 of the screw 203 and the armature 202. This portion is hollow and has an inner face 206 which defines, on a longitudinal portion of the valve 1, the flow chamber. It should be noted that even if a portion of the fluid passes between the inner face 107 of the housing wall 100 and the outer face 213 of the movable member 200, this would not cause fluid leakage out of the housing 100. a preferred embodiment, the movable member 200 forms with the screw 203 one and the same piece. According to a preferred embodiment, the inner wall of the screw 203 at its thread 204 to cooperate with the nut 105 defines a passage section for the fluid. Preferably, all the fluid passes through this section. Advantageously, the ratio of the diameter of the inner wall of the screw 203 to the diameter of the inner face 107 of the wall of the casing 100 at the level of the cooperation between the screw 203 and the nut 105, and more precisely at the thread 204 of the screw 203, is greater than 0.6 and preferably greater than 0.7 and preferably greater than 0.85. Typically, it is between 0.7 and 0.9. This allows for high throughput for limited footprint. This advantageously makes it possible to limit the pressure drops.
    [0017] Typically, in the context of a sodium circuit for a nuclear reactor, at the thread 108 carried by the nut 105, the diameter of the inner face 107 of the wall of the casing 100 may be greater than several tens of centimeters and that of the inner wall may also be greater than several tens of centimeters. The sodium speed can reach a maximum of 10 m / s.
    [0018] Preferably, the rotational guidance of the movable member 200 in the casing 100 is provided by the screw torque 203 nut 105 only. Thus, the valve 1 does not require a ball bearing inside the casing 100. This is particularly advantageous for nuclear applications since the presence of liquid sodium with the ball bearings could significantly complicate the valve 1.
    [0019] Preferably, the translational guidance of the movable member 200 in the casing 100 is provided solely by the cooperation between the nut 105 and the screw 203. Optionally, suitably adjusted spans may be provided to improve the translational guidance. . Particularly advantageously, the ball screw connection is dimensioned so as to be irreversible. The invention thus makes it possible to ensure a passive holding of the shutter 201 against the seat 104, thus considerably improving the safety of the valve 1 even in the event of failure of the control device. For example, for an intermediate diameter of the internal thread 204 and external thread 108 of 98 mm and for a screw pitch of 15 mm, a helix angle of 2.8 will be chosen. Preferably, the output 103 and / or the input 102 prevents fluid retention in the enclosure 101. For example as shown in Figures 1 and 2, the output 103 is off-axis with respect to the translation axis. The misalignment is referenced 3 in the figures. Preferably, the outlet 103 constitutes a low point for the valve 1 when its longitudinal direction 2 is disposed horizontally. This is particularly advantageous for draining the valve 1. The advantage is even more obvious when the fluid is sodium and the solidification in retention pockets form soda. As illustrated in FIG. 2, the inner face 107 of the wall of the casing 100 has a cylindrical central portion 110, preferably of constant diameter, as well as two end portions 111, 112. A first end portion 111 is frustoconical and connects the central portion 110 to the flange centered on the axis of rotation of the screw 203. Another end portion 112 is partially frustoconical and connects the central portion 110 to the flange which is offset with respect to the axis of rotation of the screw 203. According to another embodiment, combined or alternative to the previous one, the input 102 is off-center and constitutes a low point avoiding the retention pockets. According to another embodiment, the inlet 102 and the outlet 103 are coaxial with each other and arranged coaxially with the translation axis. Preferably, the screw 203 forms a monolithic piece which comprises at least the internal thread 204 and the armature receiving zone 202. According to an advantageous embodiment, the screw 203 is secured to a shutter support 208 which is for example welded to the screw 203 or which forms with the latter a monolithic piece.
    [0020] The shutter support 208 comprises ribs connecting the screw 203 to the shutter 201 and openings for the passage of the fluid. The seat 104 and the shutter 201 are centered on the axis of rotation of the screw 203. Preferably, the shutter 201 has a spherical portion intended to bear against the seat 104 which has a circular or frustoconical portion of the closure of the valve 1 is effected by a circular contact. According to a particularly advantageous embodiment, the shutter 201 is mounted in free rotation relative to the screw 203 at least around the axis of rotation of the screw 203. This makes it possible to eliminate the friction between the shutter 201 and the seat 104 by transferring the rotational movement between the shutter 201 and the screw 203 thereby limiting the wear of the seat 104 and the shutter 201. Preferably, the support 208 shutter 201 is secured to the screw 203 and receives the shutter 201 in simple pivot connection about the axis of rotation of the screw 203. Preferably, the movable member 200 consisting of the screw 203 and the shutter support 208 is entirely of metal. It can be monolithic or formed by welded parts. Preferably, the shutter 201 is also metal. In a particular embodiment, the shutter 201 is fixed relative to the screw 203 and forms with the latter and the shutter support 208 201 a monolithic part. Preferably, the wall of the housing 100 defining the enclosure 101 forms a single piece. It is preferably metal. It is preferably obtained by welding several pieces. Preferably, the entire housing 100 with the possible exception of the inductor 113 and the power supply device of the latter, in the case where the inductor 113 is not a permanent magnet, is all metal . Thus, the valve 1 can be made entirely of metal. It is therefore perfectly suited to aggressive chemical liquids and / or liquids heated to a very high temperature, such as for example the heat transfer medium used in 4th generation nuclear reactors. According to a preferred embodiment, the valve 1 according to the invention does not include seals 300. Preferably, the housing 100, respectively the screw 203 are fully welded which further increases the robustness and reliability of the assembly. According to a particularly advantageous embodiment, the drive in rotation of the screw 203 by the control device is carried out by permanent magnets. This reduces the size of the valve 1. According to an alternative embodiment, the control device comprises a motor provided with coils. This alternative has the advantage of being less expensive than permanent magnets. Figure 3 illustrates another embodiment including magnets and coils. In this embodiment, the screw 203 surrounds the fluid. The armature 202 forming the rotor 210 surrounds the screw 203. It comprises magnets 211 and a magnetic yoke 212. The wall of the casing 100 forms a pipe 115 surrounding the rotor 210 while being distant from the latter of a set J1. The inductor 113 forms the stator 114 and surrounds the pipe 115. The stator comprises coils 116 and a magnetic yoke 117. Preferably, a clearance, referenced J2, separates the stator 114 from the pipe 115. In a particularly advantageous manner, it is possible to provide a device for manually actuating the inductor 113 and / or an additional inductor manually operable to allow the movement of the screw 203 manually. This makes it possible to control the position of the shutter 201 even in the event of failure of the inductor 113. The valve 1 according to the invention thus proves to be particularly advantageous in the field of nuclear reactors, more specifically in the sodium circuit. a fast neutron reactor with a heat transfer medium. In view of the foregoing description, it is clear that the valve 1 according to the invention offers increased strength and significantly improved sealing compared to existing valves 1. In addition, it allows to limit the pressure losses and offer a high flow while maintaining a small footprint. Its design allows all-metal manufacturing which further increases its robustness and reliability. It also facilitates emptying and reduces the risk of unintentional fluid retention. Its cost is relatively low. Although particularly advantageous for controlling liquid sodium, the valve according to the invention is not limited to the regulation of liquid metal or the regulation of liquid brought to temperatures above 300 ° C. The invention is not limited to the previously described embodiments and extends to all the embodiments covered by the claims.
    [0021] REFERENCES 10 15 20 25 1. Valve 200. Moving body 2. Longitudinal direction Offset 201. Shutter 3. Housing 202. Induced 100. Watertight enclosure 203. Screw 101. Inlet 204. Inner thread 102. Outlet 205. Outer face of the screw 103. Seat 206. Inner face 104. Nut 207. Slot 105. Outer face 208. Shutter support 106. Inner face 209. Cavities 107. External thread 210. Rotor 108. Ball 211. Magnet 109. Cylindrical portion 212. Cylinder head 110. Frustoconical wall 213. Inner face of movable member 111. Partially frustoconical wall 112. Inductor 113. Stator 114. Piping 115. Coils 116. Cylinder head 117.
    权利要求:
    Claims (22)
    [0001]
    REVENDICATIONS1. Valve (1) comprising: - a casing (100) forming an enclosure (101) inside which a fluid is intended to flow and having at least one inlet (102) and at least one outlet (103) of the fluid, - a shutter (201) configured to cooperate with a seat (104) integral with the housing (100) to close at least the inlet (102) or at least the outlet (103) of the fluid, - a control device of the position of the shutter (201) relative to the seat (104), characterized in that: - the control device comprises at least one inductor (113) and at least one armature (202) magnetically coupled and configured so that the inductor (113) drives the armature (202) in rotation so as to selectively cause the shutter (201) to move closer to or away from the seat (104), - the armature (202) is located at inside the enclosure (101) and is fixed with respect to a screw (203) carrying the shutter (201), the screw (203) being configured for operating with a nut (105) integral with the casing (100) so as to transform a rotation of the armature (202) into a translation of the shutter (201), - the screw (203) is hollow and the valve (1) ) is configured so that the fluid flows at least partially inside the screw (203).
    [0002]
    2. Valve (1) according to the preceding claim, configured so that the main flow of the fluid takes place by the inside of the screw (203).
    [0003]
    3. Valve (1) according to any one of the preceding claims, configured so that all the fluid flows through the inside of the screw (203).
    [0004]
    4. Valve (1) according to any one of the preceding claims, wherein the housing (100) has a wall forming the enclosure (101), wherein the inductor (113) and the armature (202) are arranged on both sides of the wall and in which the nut (105) is carried by an inner face (107) of the wall.
    [0005]
    5. Valve (1) according to any one of the preceding claims, wherein the housing wall (100) has an inner face (107) of which at least a portion is cylindrical and the screw (203) has an inner wall of which one at least one cylindrical portion and wherein the ratio of the inner wall diameter of the screw (203) to the diameter of the inner face (107) of the housing wall (100) at the cooperation between the screw (203) and the nut (105) is greater than 0.6 and preferably greater than 0.85.
    [0006]
    6. Valve (1) according to any one of the preceding claims, wherein the cooperation between the screw (203) and the nut (105) forms a ball screw type connection.
    [0007]
    The valve (1) according to any one of the preceding claims, wherein the ball screw is configured to be irreversible, so that a pushing force applied to the shutter (201), at least in the direction tending to move the shutter (201) away from the seat (104), does not allow to drive the screw (203) in rotation.
    [0008]
    8. Valve (1) according to any one of the preceding claims, wherein the housing (100) forms a monolithic part.
    [0009]
    9. Valve (1) according to any one of the preceding claims, wherein the housing (100) is formed solely of welded parts to each other.
    [0010]
    10. Valve (1) according to any one of the preceding claims, wherein the housing (100) and the screw (203) are metal.
    [0011]
    11. Valve (1) according to any one of the preceding claims, wherein the shutter (201) is articulated in free rotation on the screw (203) at least about the translation axis of the screw (203).
    [0012]
    12. Valve (1) according to any one of the preceding claims, wherein the mechanical connection between on the one hand the housing (100) and the other by the screw (203) is provided solely by the cooperation between the screw ( 203) and the nut (105).
    [0013]
    13. Valve (1) according to any one of the preceding claims, comprising a casing integral with the screw (203) and cooperating with the screw (203) to form a housing (207) sealed for receiving the armature (202) .
    [0014]
    14. Valve (1) according to any one of claims 1 to 12, wherein the armature (202) and the screw (203) form a monolithic piece.
    [0015]
    15. Valve (1) according to any preceding claim, wherein the enclosure (101) extends mainly in a longitudinal direction (2) corresponding to the translation direction of the screw (203) and at least l one of the inlet (102) and the outlet (103) is shaped to form a low point of the enclosure (101) at least for a position of the valve (1) in which its longitudinal direction (2) is arranged horizontally.
    [0016]
    16. Valve (1) according to any one of the preceding claims, wherein the housing (100) extends mainly in a longitudinal direction (2) corresponding to the translation direction of the screw (203) and has at least l one of the input (102) and the output (103) which is off-axis with respect to the translation direction of the screw (203).
    [0017]
    17. Valve (1) according to any one of the preceding claims, wherein the control device comprises permanent magnets.
    [0018]
    18. Valve (1) according to any one of the preceding claims, wherein the control device comprises coils.
    [0019]
    19. Valve (1) according to the preceding claim, wherein the inductor (113) is fixed relative to the housing (100).
    [0020]
    20. Liquid metal circulation control system comprising a metal pipe and a valve (1) according to any preceding claim wherein the housing (100) and the screw (203) are metal, the valve (1) being welded to the pipe.
    [0021]
    21. Use of the valve (1) according to any one of claims 1 to 19 for regulating the circulation of a fluid having a temperature greater than or equal to 350 ° C and preferably greater than or equal to 400 ° C.
    [0022]
    22. Use of the valve (1) according to the preceding claim for controlling the flow of liquid sodium to ensure the heat transfer in a nuclear reactor circuit with heat transfer sodium.
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    同族专利:
    公开号 | 公开日
    US20150171190A1|2015-06-18|
    RU2649881C2|2018-04-05|
    KR20150071682A|2015-06-26|
    US9466695B2|2016-10-11|
    FR3014994B1|2016-08-05|
    CN104791499B|2019-03-15|
    ES2690791T3|2018-11-22|
    EP2887358B1|2018-07-11|
    JP2015117833A|2015-06-25|
    EP2887358A1|2015-06-24|
    CN104791499A|2015-07-22|
    RU2014150765A|2016-07-10|
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    JP5391317B1|2012-08-01|2014-01-15|ジェイエムモーターズカンパニーエルティディ|Cone valve with precise pressure and flow control|EP3300684B1|2016-09-30|2020-01-15|Ferton Holding S.A.|Fluid distributing device|
    WO2018093355A1|2016-11-15|2018-05-24|Schlumberger Technology Corporation|Systems and methods for directing fluid flow|
    CN109764156B|2019-02-14|2019-10-11|江苏中海华核环保有限公司|A kind of secondary sodium circulation pump test device sodium valves|
    CN110805414A|2019-11-11|2020-02-18|西安石油大学|Stroke sensor of electric water injection tool for oil field|
    CN113757401A|2021-09-07|2021-12-07|哈电集团哈尔滨电站阀门有限公司|Manual wedge type gate valve capable of preventing wedge from being dead|
    法律状态:
    2015-12-24| PLFP| Fee payment|Year of fee payment: 3 |
    2016-12-22| PLFP| Fee payment|Year of fee payment: 4 |
    2017-12-20| PLFP| Fee payment|Year of fee payment: 5 |
    2018-12-31| PLFP| Fee payment|Year of fee payment: 6 |
    2020-10-16| ST| Notification of lapse|Effective date: 20200910 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1362929A|FR3014994B1|2013-12-18|2013-12-18|VALVE FOR FLUID CIRCULATION|FR1362929A| FR3014994B1|2013-12-18|2013-12-18|VALVE FOR FLUID CIRCULATION|
    ES14196809.9T| ES2690791T3|2013-12-18|2014-12-08|Valve for fluid circulation|
    EP14196809.9A| EP2887358B1|2013-12-18|2014-12-08|Valve for fluid circulation|
    RU2014150765A| RU2649881C2|2013-12-18|2014-12-15|Valve for fluid circulation, liquid metal circulation control system comprising such valve, and use of said valve|
    JP2014254892A| JP2015117833A|2013-12-18|2014-12-17|Valve for fluid circulation|
    CN201410791020.5A| CN104791499B|2013-12-18|2014-12-18|Valve for fluid circulation|
    KR1020140183472A| KR20150071682A|2013-12-18|2014-12-18|Valve for fluid circulation|
    US14/575,376| US9466695B2|2013-12-18|2014-12-18|Valve for fluid circulation|
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