• 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 an induction coil armature for a nuclear reactor, its inner frame (1) and its enclosure (2). The presence of several grooves (101) which are distributed uniformly over the inner framework (1) and the enclosure (2) allows not only that the inner frame (1) and the enclosure (2) whose main bodies are Metals can withstand high temperature and avoid eddy currents, but also the coil generates a more uniform magnetic field, attenuating or canceling asymmetric and local wear. The movement performance of CRDM is thus improved.
    公开号:FR3046490A1
    申请号:FR1663077
    申请日:2016-12-21
    公开日:2017-07-07
    发明作者:Xiyu Huang
    申请人:Xiyu Huang；
    IPC主号:
    专利说明:

    TECHNICAL AREA
    The present invention relates to equipment of the control rod drive mechanism field of a nuclear reactor, including an induction coil armature for a nuclear reactor, its inner frame and its enclosure.
    STATE OF THE ART
    The nuclear reactor is the nucleus of a nuclear power plant. The control rod drive mechanism ("Control Rod Drive Mechanism") of a nuclear reactor is used to lift, insert or maintain control rods in the heart of reactor along an axis, to control the speed of the nuclear fission chain reaction, start / stop the reactor, or regulate the power of the reactor. In the event of an accident, the CRDM makes it possible to quickly insert the control bar downwards to carry out the urgent shutdown of the nuclear reactor for a short time and thus guarantee safety. For this, it is necessary to use devices of the CRDM coil. Given the specific side of its work environment and the importance of its roles, the CRDM induction coil must meet the requirements such as tolerance to high temperature, good insulation performance, radiation resistance , moisture and shock.
    The maximum temperature that can be experienced by the CRDM induction coil component in the nuclear power plant is only 250 ° C, whereas that of the nuclear reactor coolant exceeds 300 ° C. In order for the CRDM to work reliably, forced ventilation is required to cool the CRDM induction coil component, thus making the structure of the upper part of the reactor very complicated.
    To improve the temperature resistance of the induction coil component, there are documents in the prior arts, such as patent application CN201410500311.4, the title of which is "Insulating structures, enclosures and inner frames of the coil. induction ". A solution to this problem is proposed in the latter, but without bypassing other disadvantages. Studies on CRDM are thus oriented to optimize the characteristics of CRDM movements and to meet the requirements of CRDM on its great longevity.
    STATEMENT OF THE INVENTION
    The present invention aims to overcome the drawbacks of the prior art by providing an induction coil armature of a nuclear reactor, its inner frame and its enclosure. For this purpose, the invention relates to an induction coil armature dedicated to the nuclear reactor which comprises an internal frame in a cylindrical structure and an enclosure, between the inner frame and the enclosure is formed a circular cavity, moreover, The internal frame is located within the orifice of the enclosure. The inner frame and the enclosure both comprise a metal main body and grooves that pass through the inner and outer walls, the front and the back. The grooves of the inner frame are at least two and evenly distributed on the inner frame; and the grooves of the enclosure are at least two and distributed uniformly over the enclosure; and the connecting insulating strips are provided in all the grooves.
    In embodiments, the cylindrical structures of the inner frame and the enclosure are formed, respectively, by the metal body portion of the inner frame and the enclosure, and by the groove that are present on the main body. The winding is in the free space between the inner frame and the enclosure. During operation of the winding, the grooves on the inner frame and on the enclosure serve to prevent eddy currents from occurring, by cutting the inner frame and the enclosure. Advantageously, the fact that there are at least two grooves ensures that the inner frame and the enclosure are formed of as many arched metal sheets as the amount of their own grooves. These arched metal sheets are connected by insulating strips so that the inner frame and the enclosure have a cylindrical shape. This allows on the one hand to avoid eddy currents and on the other hand to keep their own forms.
    The armatures of the existing coils for nuclear power plants are of closed circular shape and constituted by injection of non-metallic macromolecular materials. These do not have a good tolerance to high temperature, so that the temperature at which resist coils is of the order of 250 ° C. To remedy this problem, coils with metal reinforcements are proposed.
    However, the presence of a single groove brings disadvantages including the CRDM. More precisely, the magnetic field generated by such a coil is not symmetrical, thus causing electromagnetic force components that are no longer symmetrical. When parts within CRDM move along the axis, they also tend to rotate around a radial axis, which increases the resistance with anti-rotation stops. As a result, local and asymmetric wear is cumulative and not negligible over a long period, decreasing the movement performance of CRDM.
    In embodiments, the insulating strips on the framework or the enclosure are at least two, moreover they are distributed uniformly on the framework or the enclosure. Such an arrangement allows the magnetic field generated by the coil to be substantially uniform, reducing or canceling the turning tendency of the CRDM parts during the movement along the axis. This helps protect CRDM parts and improve the movement performance of CRDM.
    As the fixed base of the winding, the inner frame must only have a cylindrical shape. Advantageously, the insulating connecting strips of the inner frame are sealed or embedded in the inner frame.
    As a protective part of the winding, the enclosure is mounted after mounting the winding. To facilitate the mounting of the enclosure, a notch or a convex relief is provided on both sides of each groove of the enclosure, in addition, the direction along the notch or the convex relief that begins at the end of the enclosure. enclosure is that of the axis of the enclosure. The insulating connecting strip of the enclosure is that which blocks the notches or convex reliefs of two sides of the same groove of the enclosure. The parts of the enclosure are assembled or separated by mounting or dismounting notches or convex reliefs.
    In order to eliminate radial electromagnetic force components that are asymmetrical, the amount of grooves on the inner frame is multiple of that of the grooves on the enclosure. With such a relationship between the grooves on the internal framework and on the enclosure, the components of radial electromagnetic forces cancel each other out, eliminating local and asymmetric wear and the stresses on the anti-rotation stops that come from asymmetry. of the magnetic field.
    In order for the magnetic field to be substantially uniform, the grooves on the inner frame and those on the enclosure are of the same amount and have a one-to-one correspondence at the position. Specifically, each pair of associated grooves are in the same radial direction of the armature.
    On both ends of the inner frame are arranged outer circular edges which have the same axis as the main body. These outer circular edges connect the inner frame and the enclosure. The inner orifices of the outer edges are connected to the ends of the inner frame whose grooves extend to the ends of the outer edges. The outer diameter of the enclosure is less than or equal to that of the outer edges between which is wedged the enclosure, the ends of the enclosure and the outer edges being separated by an insulating layer.
    In order to protect the winding of the induction coil as much as possible, the circular cavity is closed.
    To facilitate machining and manufacturing, the direction along the grooves of the inner frame and the enclosure is parallel to the axis of the inner frame or that of the enclosure. The metal cylinders of different internal diameters are used as the blank parts for the manufacture of the inner frame and the enclosure. The blank parts are cut in equal parts along the axis precisely, and what is lost during this machining is replaced by insulating connecting strips. The inner frame and the enclosure are thus obtained.
    The present invention further provides an inner frame of the induction coil armature. It has a metal main body and grooves on the main body. The direction along the grooves of the inner frame is parallel to the axis of the inner frame. The grooves of the inner frame are at least two and pass through the inner and outer walls, the front and back of the frame. They are evenly distributed on the internal framework. The insulating connecting strips are provided in all grooves of the inner frame.
    The present invention also provides an enclosure of the induction coil armature. It has a metal main body and grooves on the main body. The direction along the grooves of the enclosure is parallel to the axis of the enclosure. The grooves of the enclosure are at least two and pass through the inner and outer walls, the front and the back of the enclosure. They are evenly distributed on the speaker. The insulating connecting strips are provided in all the grooves of the enclosure.
    These embodiments make it possible for the magnetic field within the framework and the enclosure to be symmetrical with respect to the coil axis when the winding is operating, which makes it possible to avoid local and asymmetrical wear and therefore protect CRDM parts and improve the movement performance of CRDM.
    The insulating strips on the framework or the enclosure are at least two and are distributed evenly over the framework or the enclosure. This arrangement advantageously ensures that the magnetic field generated by the coil is substantially uniform, reducing or canceling the tendency to rotate CRDM parts during movement along the axis. This finally helps to protect CRDM parts and improve the movement performance of CRDM.
    PRESENTATION OF THE FIGURES The invention will be better understood on reading the following description, given by way of non-limiting example, and with reference to FIGS. 1 to 3 which represent: FIG. 1: a schematic representation, in section, an embodiment of an induction coil armature dedicated to the nuclear reactor according to the present invention. - Figure 2: a schematic representation of the enclosure in an embodiment of an induction coil armature dedicated to the nuclear reactor according to the present invention. - Figure 3: a schematic representation of the inner frame in an embodiment of an induction coil armature dedicated to the nuclear reactor according to the present invention.
    The elements in the figures bear the following references: 1: an internal frame; 2: an enclosure; 3: a coil winding; 4: an insulating sealing layer; 101: a groove; 102: an insulating strip; 103: an insulating layer; 201: an insulating band of connection.
    DETAILED DESCRIPTION OF EMBODIMENTS
    The present invention will be further exposed with the present description, the embodiments of which are provided in a non-limiting manner.
    Embodiment 1
    It will be noted in FIGS. 1 to 3 that an induction coil armature dedicated to the reactor comprises an internal frame 1 in a cylindrical structure and an enclosure. Between the inner frame 1 and the enclosure is formed a circular cavity in which coil windings 3 are housed, and the inner frame 1 is located within the orifice of the enclosure 2. The inner frame 1 and the enclosure 2 comprises a metal main body and grooves 101. The grooves 101 of the inner frame 1 pass through the inner and outer walls, the front and the rear of the frame 1, and those of the enclosure 2 pass through the inner and outer walls, the front and the rear of the enclosure 2. The grooves 101 of the inner frame 1 and the enclosure 2 are all at least two in number and distributed uniformly, respectively on the outside. 1 and the enclosure 2. The insulating strips 102 of connection are provided in all the grooves 101.
    In the present invention, the cylindrical structures of the inner frame 1 and the enclosure 2 are formed, respectively, by the metal body portion of the inner frame 1 and the enclosure 2, and by the groove 101 which present on the main body. The winding 3 is in the free space between the inner frame 1 and the enclosure 2. During operation of the winding 3, the groove 101 on the inner frame 1 and on the enclosure 2 serve to avoid that eddy currents occur, by cutting the inner frame 1 and the enclosure 2. Advantageously, the fact that there are at least two grooves ensures that the inner frame 1 and the enclosure 2 are formed of as many arched metal sheets as the amount of their own grooves. These arcuate metal sheets are connected by insulating strips so that the inner frame 1 and the enclosure 2 have a cylindrical shape. This allows on the one hand to avoid eddy currents and on the other hand to keep their own forms.
    The armatures of the existing coils for nuclear power plants are of closed circular shapes and consist of injection of non-metallic macromolecular materials. These do not have a good tolerance to high temperature, so that the temperature at which resist coils is of the order of 250 ° C. To remedy this problem, coils with metal reinforcements are proposed.
    On the other hand, the presence of a single groove 101 brings disadvantages, in particular to the CRDM. More precisely, the magnetic field generated by such a coil is not symmetrical, thus causing electromagnetic force components that are no longer symmetrical. When parts within CRDM move along the axis, they also tend to rotate around a radial axis, which increases the resistance with anti-rotation stops. As a result, local and asymmetric wear is cumulative and not negligible over a long period, decreasing the movement performance of CRDM.
    The insulating strips on the frame 1 or the enclosure 2 are at least two, moreover they are evenly distributed on the frame 1 or the enclosure 2. Such an arrangement allows the magnetic field generated by the coil to be substantially uniform, reducing or canceling the tendency to rotate CRDM parts during movement along the axis. So it protects the CRDM parts and improves the performance of CRDM movement.
    The present invention further provides an inner frame 1 of the induction coil armature. It comprises a metal main body and grooves 101 present on the main body. The direction along the grooves 101 of the inner frame 1 is parallel to the axis of the inner frame 1. The grooves 101 of the inner frame 1 are at least two and pass through the inner and outer walls, the front and the rear of the frame 1. They are evenly distributed on the inner frame 1. The insulating connecting strips are provided in all grooves 101 of the inner frame 1.
    The present invention also provides an enclosure 2 of the induction coil armature. It comprises a metal main body and the grooves 101 present on the main body. The direction along the grooves 101 of the enclosure 2 is parallel to the axis of the enclosure 2. The grooves 101 of the enclosure 2 are at least two and pass through the inner and outer walls, the front and the back of the enclosure 2. They are evenly distributed on the enclosure 2. The insulating connecting strips are provided in all grooves 101 of the enclosure 2.
    These proposed solutions allow the magnetic field within the frame 1 and the enclosure 2 to be symmetrical with respect to the coil axis when the winding 3 is operating, which makes it possible to avoid local and asymmetrical wear and therefore protect CRDM parts and improve the movement performance of CRDM.
    By the uniform distribution of the grooves 101 on the frame 1 and the enclosure 2, it is meant that the grooves 101 of the frame 1 are uniformly distributed around the axis of the frame 1 by forming a circle, and that the grooves 101 of the enclosure 2 are uniformly distributed around the axis of the enclosure 2 forming a circle. The insulating bonding strips are made of insulating materials such as porcelain, mica.
    Embodiment 2
    This embodiment is based on Embodiment 1.
    Again in Figures 1 to 3, as the fixed base of the winding 3, the inner frame 1 must only have a cylindrical shape. Advantageously, the insulating strips 102 connecting the inner frame 1 are sealed or embedded in the inner frame 1.
    Embodiment 3
    This embodiment is based on Embodiment 1.
    As illustrated in Figures 1 to 3, the two ends of the inner frame 1 have outer circular edges which have the same axis as the main body. These outer circular edges connect the inner frame 1 and the enclosure 2. The internal holes of the outer edges are connected with the ends of the inner frame 1 whose grooves extend to the ends of the outer edges. The outside diameter of the chamber 2 is less than or equal to that of the outer edges between which is wedged the chamber 2, the ends of the enclosure 2 and the outer edges being separated by an insulating layer.
    In order to protect the winding 3 of the induction coil as much as possible, the circular cavity is closed.
    Embodiment 4
    This embodiment is based on Embodiment 1.
    As illustrated in FIGS. 1 to 3, as a protective part of the winding 3, the enclosure is mounted after mounting of the winding 3. To facilitate the mounting of the enclosure 3, a notch or a convex relief is provided on both sides of each groove 101 of the chamber 2, in addition, the direction along the notch or the convex relief that starts from the end of the chamber 2 is that of the axis of the enclosure 2. The insulating connecting strip of the enclosure 2 is that which blocks the notches or convex reliefs of two sides of the same groove of the enclosure 2. The parts of the enclosure 2 are assembled or separated by mounting or disassembly of notches or convex reliefs.
    Embodiment 5
    This embodiment is based on Embodiment 1.
    As illustrated in FIGS. 1 to 3, in order to eliminate radial electromagnetic force components that are asymmetrical, the amount of grooves 101 on inner frame 1 is multiple of that of grooves 101 on enclosure 2. With such a relationship between the grooves on the inner frame and on the chamber 2, the components of radial electromagnetic forces cancel each other out, eliminating local and asymmetric wear and the stresses on the anti-rotation stops that come from the asymmetry of the magnetic field.
    Embodiment 6.
    This embodiment is based on Embodiment 1.
    For the magnetic field to be substantially uniform, the grooves 101 on the inner frame 1 and those on the enclosure 2 are of the same quantity and have a one-to-one correspondence at the position. Specifically, each pair of associated grooves are in the same radial direction of the armature.
    Embodiment 7.
    In Figure 1, the winding 3 is formed on the inner frame 1, and an insulating layer 103 of mica is between the winding 3 and the inner frame 1; the enclosure 2 is around the winding 3, and an insulating sealing layer 4 is located between the winding 3 and the enclosure 2. The insulating sealing layer 4 is a cylindrical structure obtained by the vacuum casting of lacquer insulating and quartz sands and then solidification at high temperature, the inner frame 1 and the enclosure 2 are non-magnetic stainless steel.
    Embodiment 8.
    This embodiment is based on any of the previous embodiments.
    Still in FIGS. 1 to 3, in order to facilitate machining and manufacture, the direction along the grooves 101 of the inner framework 1 and the enclosure 2 is parallel to the axis of the internal framework 1 or to that of the enclosure 2. The metal cylinders of different internal diameters are used as the blank parts for the manufacture of the inner frame and the enclosure. The blank parts are cut in equal parts along the axis precisely, and what is lost during this machining is replaced by insulating connecting strips. The inner frame and the enclosure are thus obtained. The invention describes with reference to the embodiments disclosed is not limited to them, but covers any modification that the skilled person is able to achieve.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Induction coil armature for a nuclear reactor, comprising an inner frame (1) in a cylindrical structure and an enclosure (2) between which a circular cavity is formed, said inner frame (1) being located within the orifice of said enclosure (2), the inner frame (1) and the enclosure (2) each having a metal main body and grooves (101) which pass through the inner and outer walls, the front and the back of the frame (1) and the enclosure (2), characterized in that: the grooves (101) of the inner frame (1) are at least two and distributed uniformly over the inner frame (1); the grooves (101) of the enclosure (2) are at least two and distributed uniformly over the enclosure (2); connecting insulating strips being provided in all the grooves (101).
    [2" id="c-fr-0002]
    2. induction coil armature for a nuclear reactor according to claim 1, characterized in that insulating connecting strips (102) of the inner frame (1) are sealed or embedded in said inner frame (1).
    [3" id="c-fr-0003]
    Induction coil armature for a nuclear reactor according to claim 1, characterized in that: a notch or a convex relief is arranged on both sides of each groove (101) of the enclosure (2), the direction along the notch or the convex relief that starts from the end of the enclosure (2) being that of the axis of the enclosure (2); the insulating connecting band of the enclosure is that which blocks the notches or convex reliefs of two sides of the same groove of the enclosure (2).
    [4" id="c-fr-0004]
    4. induction coil armature for a nuclear reactor according to claim 1, characterized in that the amount of the grooves (101) on said inner frame (1) is multiple of that of the grooves (101) on the enclosure (2). ).
    [5" id="c-fr-0005]
    5. induction coil armature for a nuclear reactor according to claim 1, characterized in that the grooves (101) on said inner frame (1) and those on the enclosure (2) are of the same quantity and have a correspondence one-to-one at their position, each pair of associated grooves being in the same radial direction of the armature.
    [6" id="c-fr-0006]
    6. Induction coil armature for a nuclear reactor according to claim 1, characterized in that on both ends of said inner frame (1) are arranged circular edges which have the same axis as the main body, the internal orifices. outer curbs connected with the ends of the inner frame (1) whose grooves extend to the ends of the outer curbs, the outer diameter of the enclosure (2) being less than or equal to that of the outer curbs between which is jammed the enclosure (2), the ends of the enclosure (2) and the outer edges being separated by an insulating layer.
    [7" id="c-fr-0007]
    7. induction coil armature for a nuclear reactor according to claim 6, characterized in that said circular cavity is closed.
    [8" id="c-fr-0008]
    8. induction coil armature for a nuclear reactor according to any one of the preceding claims, characterized in that the direction along the grooves (101) of the inner frame (1) and the enclosure (2). is parallel to the axis of the inner frame (1) or that of the enclosure (2).
    [9" id="c-fr-0009]
    9. Internal frame of an induction coil armature according to one of the preceding claims, characterized in that: the inner frame (1) comprises a metal main body and grooves (101) which pass through the inner walls and outside, the front and the back of the frame (1); the direction along the grooves (101) of the inner frame (1) is parallel to the axis of the inner frame (1); the grooves (101) of the inner framework (1) are at least two and distributed uniformly over the inner framework (1); connecting insulating strips are arranged in the grooves (101) of the inner frame (1).
    [10" id="c-fr-0010]
    10. Enclosure of an induction coil armature according to one of claims 1 to 8, characterized in that: the enclosure (2) comprises a metal main body and grooves (101) which pass through the inner walls and outside, the front and back of the enclosure (2); the direction along the grooves (101) of the enclosure (2) is parallel to the axis of the enclosure (2); the grooves (101) of the enclosure (2) are at least two and distributed uniformly over the enclosure (2); connecting insulating strips are arranged in the grooves (101) of the enclosure (2).
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    法律状态:
    2017-10-05| PLFP| Fee payment|Year of fee payment: 2 |
    2018-08-24| PLSC| Publication of the preliminary search report|Effective date: 20180824 |
    2018-12-03| PLFP| Fee payment|Year of fee payment: 3 |
    2019-12-27| PLFP| Fee payment|Year of fee payment: 4 |
    2020-12-31| PLFP| Fee payment|Year of fee payment: 5 |
    2021-12-23| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    CN201511013781.9A|CN105427997B|2015-12-31|2015-12-31|A kind of reactor electromagnetic coil skeleton and in-seam support body and shell body thereon|
    CN2015110137819|2015-12-31|
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