• 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:
    A locking plate (900) for a locking device (110) of a jet pump carrier, the locking device (110) including a locking sleeve (112) including a lower portion, having an opening with a size for receiving the locking sleeve (112) and a spring arm ( 128). A pair of inter-mesh spring-arm ratchet teeth with interlock sleeve latch teeth (144) contained in the lower portion of the latch sleeve (112) and a retention feature (950) secure the latch sleeve (112) against loosening and loosening. The spring arm (128) is structured such that the spring arm (128) both i) a latched position in which the locking sleeve (112) is in the opening of the locking plate (900) and at least a portion of the retaining feature (950) is an upper Vertically overlapping the lower portion of the locking sleeve (112), and ii) a released position in which the locking sleeve (112) is in the aperture and the retaining feature (950) does not vertically overlap the upper surface.
    公开号:CH709319B1
    申请号:CH00900/15
    申请日:2013-12-13
    公开日:2018-09-28
    发明作者:John Lentner Bruce
    申请人:Ge Hitachi Nuclear Energy Americas Llc；
    IPC主号:
    专利说明:

    description
    BACKGROUND 1. Field The disclosure relates to devices for maintaining a desired position of a jet pump assembly within a nuclear reactor pressure vessel. 2. Description of the Prior Art A reactor pressure vessel (RPV) of a boiling water reactor (BWR) is usually of a generally cylindrical shape and is closed at both ends, e.g. through a bottom and a removable lid. An upper guide is usually located a distance above a core plate within the RDB. A core sheath, or sheath, typically surrounds the core and is supported by a sheath support structure. In particular, the jacket has a generally cylindrical shape and surrounds both the core plate and the upper guide. Between the cylindrical reactor pressure vessel and the cylindrical shaped shell is a space or annulus.
    In a SWR, hollow tubular jet pumps positioned within the shell annulus provide the necessary core flow of water. The upper portion of the jet pump, known as the inlet mixer, is laterally positioned and is supported by a force-locking key against two opposing rigid contacts in grips. The inlet mixers are held in place at the upper end by a prestressed carrier. To secure the assembly, the jet pump carrier is mounted with a high preload applied by installing the jet pump carrier screw with a hydraulic tensioner. High static and dynamic jet pump flow loads at the inlet mixer may, under some conditions, e.g. cause insufficient carrier bias, swinging movements and adverse vibration excitation in the jet pump. The resulting increased levels of vibration and corresponding vibration loads on the casing and struts can cause weakening of jet pump components through wear and fatigue. Extreme component weakening may require shutdown. To ensure that the required preload is maintained, the carrier screw is securely locked to prevent disengagement upon completion of tightening. Devices for performing tensioning and securing the backing screw after tensioning are discussed in U.S. Patent Nos. 6,434,208 and 7,764,760, the entire contents of which are incorporated herein by reference. Another object is to allow repeated relaxation and tensioning of a carrier screw while significantly reducing the need to replace or significantly modify a carrier screw locking device. Another object is to facilitate repair or replacement of a locking device for a carrier screw.
    The objects are achieved on the basis of the independent claims.
    Brief Description of the Drawings The various features and advantages of the non-limiting embodiments herein will become more apparent upon a review of the detailed description taken in conjunction with the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not to be interpreted as limiting the scope of the claims. The attached drawings are not to be considered as true to scale unless expressly stated. For the sake of clarity, various dimensions of the drawings may have been exaggerated.
    1 is a sectional view, with parts cut away, of a boiling water nuclear reactor pressure vessel in accordance with at least one example embodiment.
    FIG. 2 is a perspective view of a jet pump assembly in accordance with at least one example embodiment.
    3 is a side view of a jet pump carrier in accordance with at least one example embodiment.
    Fig. 4 is a plan view of a first example lock plate.
    Fig. 5 is a plan view of a jet pump carrier with a locking sleeve and the first Verriege ment plate solved.
    Fig. 6 is a plan view of a jet pump carrier with the locking sleeve and the first locking plate latched.
    Fig. 7 is a cross-sectional view of a locking sleeve and the first example locking plate.
    Fig. 8 is a perspective view of a second example lock plate.
    9A-9I are various views of a third latch plate according to at least one example embodiment.
    10 illustrates a portion of a latch assembly including the third latch plate according to at least one example embodiment.
    11 is a cross-sectional view of the locking sleeve and third locking plate according to at least one example embodiment.
    DETAILED DESCRIPTION OF THE INVENTION It should be understood that when an element or layer is covered as "on," "connected to," coupled with "another element or layer, or layer, or layer », They are directly on the other element or layer, be connected to, be coupled to, or cover, or may have intermediate elements or layers. In contrast, when an element is labeled "directly on," "directly connected to," or "directly coupled to" another element or layer, there are no intermediate elements or layers. Like numbers refer to like elements throughout the specification. As used herein, the term "and / or" includes all combinations of one or more of the elements listed in the context.
    It should be understood that although the terms first, second, third, etc. may be used herein to refer to various elements, components, regions, layers, and / or sections To describe these elements, components, regions, layers and / or sections should not be limited by these terms. These terms are used merely to distinguish one element, component, region, layer or section from another region, layer or section. Thus, a first element, component, region, layer or section discussed below could also be referred to as a second element, component, region, layer or section without departing from to remove the teachings of example embodiments.
    Spatially-related terms (eg, "below," "below," "lower," "above," "upper," and the like) may be used herein for ease of description to describe the relationship of an element or elements Feature to another element (s) or feature (s) as illustrated in the figures. It should be understood that the spatially referenced terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would be aligned "above" the other elements or features. Thus, the term "under" can include both an orientation above and below. The device may also be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially referenced descriptors used herein interpreted accordingly.
    The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms "a," "an," and "the" should also include plurals, unless the context clearly indicates otherwise. It will also be understood that the terms "includes," "including," "includes," and / or "comprising," as used in this specification, specify the presence of indicated features, integers, steps, operations, elements, and / or components but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.
    The latched position of the spring arm is a position in which the spring arm ratchet teeth engage in the locking sleeve latch teeth, and the released position of the spring arm is a position in which the spring arm latch teeth do not engage in the lock sleeve latch teeth ,
    At least a portion of a retaining feature may be located at a position on the spring arm between a position of the spring arm ratchet teeth on the spring arm and an extreme end of the spring arm opposite one end of the spring arm to which the spring arm adjoins the remainder of the locking plate.
    Example embodiments are described herein with reference to cross-sectional illustrations which are schematic illustrations of idealized embodiments (and intermediate structures) of example embodiments. As such, variations of the forms of the figures due to, for example, manufacturing techniques and / or tolerances are expected. Thus, example embodiments should not be construed as limited to the forms of regions illustrated herein but are intended to include deviations in form resulting, for example, from manufacturing.
    Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the example embodiments belong. It will also be understood that terms, including those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be in an idealized or overly formal sense unless expressly so defined herein.
    Jet Pump Assembly Fig. 1 is a sectional view, with parts cut away, of a boiling water nuclear reactor pressure vessel in accordance with an example embodiment of the present invention. As shown in Fig. 1, a boiling water nuclear reactor pressure vessel (RPV) 10 is disclosed. The RDB 10 may have a generally cylindrical shape and is closed at one end by a bottom 12 and at the other end by a removable lid 14. A side wall 16 extends from the bottom 12 to the lid 14. The side wall 16 includes an upper flange 18. The lid 14 may be secured to the upper flange 18. A cylindrically shaped core shell 20 surrounds a reactor core 22. The shell 20 may be supported at one end by a shell support 24 and may include a removable shell head 26 at the other end. An annular space 28 is formed between the shell 20 and the side wall 16. A pump deck 30, which may have a ring shape, extends between the shell support 24 and the RDB side wall 16. The pump deck 30 includes a plurality of circular openings 32, each port housing a jet pump 34. The jet pumps 34 are circumferentially distributed around the core jacket 20 around. An inlet riser 36 is coupled through a transition assembly 38 to two jet pumps 34. Each jet pump 34 may include an inlet mixer 40 and a diffuser 42. The inlet riser 36 and the two connected jet pumps 34 may form a jet pump assembly 44.
    FIG. 2 is an enlarged perspective view of a portion of the jet pump assembly 44 illustrated in FIG. 1, in accordance with an example embodiment of the present invention. FIG. As shown in FIGS. 1 and 2, the jet pump assembly 44 may include a riser 36 coupled through the transition assembly 38 to a pair of jet pumps 34. Referring to Figs. 1 and 2, each jet pump 34 includes a jet pump nozzle 64, a suction inlet 66, an inlet mixer 40, and a diffuser 42 (shown in Fig. 1). The jet pump nozzle 64 may be positioned in the suction inlet 66, which may be located at a first end of the inlet mixer 40. The transitional assembly 38 may include a bottom piece 70 and two pipe bends 71. Each pipe bend 71 is coupled to a jet pump nozzle 64. The latch arms 72, 74, 76, and 78 extend from the gang assembly floor panel 70. Connected between the latch arms 72, 74, 76, and 78 is a jet pump carrier 86. In an example embodiment, the jet pump carrier 86 engages between the support arms 72 and 76, and a substantially identical jet pump carrier 86 intervenes between the support arms 74 and 78. The jet pump support 86 includes a tongue member 81 at the end which engages the notches 92 in the lock arms 72, 74, 76 and 78 to prevent and / or reduce movement (e.g., rotational movement) of the support screw 94. The carrier 86 may engage the latch arms 72, 74, 76, and 78 by sliding the tab member 81 into the notches 92.
    Referring to FIG. 3, the jet pump support 86 includes a raised central portion 88. The ends of the jet pump support 86 are supported in the notches 92 located in the latch arms 72, 74, 76, and 78. A carrier screw 94 may include a multi-sided head 96, a threaded portion 98, and a blunt end 100 that includes a lower support surface 102 that presses against a washer 104 that seats in a counterbore 105 of the pipe bend 71. The carrier screw 94 engages screwed into a threaded screw opening 106 in the jet pump carrier 86.
    A locking assembly 110 prevents the carrier screw 94 from coming off. The locking assembly 110 includes a locking sleeve 112 and a locking plate 114. The locking sleeve 112 includes a bottom portion 116 at a first end 118 and a bore 120 that extends from the first end 118 to a second end 122. The bore 120 has such a size and is shaped to suitably receive the carrier screw head 96. Example structures of the locking plate 114 will now be discussed in more detail below.
    Locking Plate In the sense of a general construction example, Fig. 4 shows a plan view of a first locking plate 400; Fig. 5 is a plan view of the jet pump support 86 with the locking sleeve 112 and the first locking plate 400 dissolved; and FIG. 6 is a plan view of the jet pump support 86 with the locking sleeve 112 and the first locking plate 400 engaged. The first locking plate 400 is an example structure for the locking plate 114 discussed above with reference to FIG. 3.
    Referring to Figs. 4, 5 and 6, the first locking plate 400 includes a carrier screw aperture 126, an integral carrier spring arm 128 and a first retaining feature 150. The first retaining feature 150 is a lip. The carrier screw opening 126 has a size for receiving the locking sleeve 112. The first retention feature 150 is configured to retain the locking sleeve 112 by engagement of an upper portion of the locking sleeve 112, as will be discussed in greater detail below with reference to FIG. The spring arm 128 includes a start portion 130 extending from the first lock plate 400 adjacent to the carrier screw opening 126, a middle portion 132 extending from the start portion 130 and extending around a periphery of the carrier screw opening 126, and a first end portion 134 extending from the central portion 132. The first end portion 134 includes a plurality of ratchet teeth 136 extending from a side 138 of the first end portion 134 that faces the center of the carrier screw opening 126.
    The first end portion 134 of the spring arm 128 also includes a notch 140 located adjacent the ratchet teeth 136. The notch 140 has a size for receiving a detent 142 extending from the first locking plate 400 into the carrier screw opening 126. The locking sleeve 112 includes a plurality of ratchet teeth 144 that are circumferentially around the bottom portion 116 and that have a size for engaging and engaging with the ratchet teeth 136 of the spring arm 128. A tab 146 extends from the first end portion 134. The tab 146 is used in conjunction with a simple release cam tool and a cam tool opening 148 in the first latch plate 400 to deflect the spring arm 128 into a latched or released position.
    The spring arm 128 is movable between a first, or latched, position (shown in Figure 6) in which the latch 142 is positioned in the notch 140 and the spring-arm latch teeth 136 are engaged with the latch sleeve latch teeth 144, and a second, or released, position (shown in FIG. 5) in which the side 138 of the first end portion 134 of the spring arm 128 is in contact with the detent 142 and the spring arm detent teeth 136 are out of the locking sleeve detent teeth 144 are solved. Spring arm 128 is first made radially offset from the first position with the end portion such that the installation detracts spring arm 128 and creates a radial biasing force. Also, for example, the spring arm 128 is made to a thickness that tapers from a maximum at the launch portion 130, so that the available bias shift is maximized for a given bending stress caused in the spring arm 128. It should be noted that the production of the somewhat complex geometry of the latch assembly 110 becomes practicable through the availability of precision-controlled wire erosion methods. Any suitable material may be used for the latch assembly 110, for example Ni-Cr-Fe alloy X-750. The X-750 alloy provides high stability, allowing a minimum size and weight of the latch assembly 110, and provides corrosion resistance in the environment of a boiling water nuclear reactor.
    Fig. 7 is a cross-sectional view of the locking sleeve 112 and the first locking plate 400 with respect to the D-D axis illustrated in Fig. 6. Referring also to FIG. 7, the first retention feature 150 of the first locking plate 400 extends at least partially around the carrier screw opening 126. The first retention feature 150 has a size for engaging an upper surface 152 of the locking sleeve bottom portion 116. Further, the first lock plate 400 includes at least one guide pin hole 154 having a size for receiving a jet pump support guide pin 156 and at least one screw hole 158 having a size for receiving the fixing screws 160.
    The latch assembly 110 securely locks the carrier screw 94 in place and is easy to install by sliding the latch sleeve 112 over the mating multi-sided carrier screw head 96 and mounting the first latch plate 400 to the carrier 86. In particular, the guide pin apertures 154 are positioned over the guide pins 156 and the fastening screws 160 are inserted and tightened through the screw apertures 158. To ensure that the fastening screws 160 do not come loose, the screws 160 may be spot-welded to the first locking plate 400 or drilled to insert a locking pin. The first retaining feature 150 receives the locking sleeve 112 and the biasing force of the spring arm 128 securely holds the locking sleeve 112 against vibration. The shape of the intermeshing ratchet teeth 136 and 144 allows the carrier screw 94 to be tightened to a predetermined torque with a tensioner, however, subsequent rotation in the release direction is limited by the intermeshing ratchet teeth 136 and 144 to less than one tooth space. The use of a narrow tooth pitch minimizes the corresponding possible variation in screw position after tightening. The sloped contact surface between the notch 140 and the detent 142 clamps the intermeshing ratchet teeth 136 and 144 closer against releasing rotation, thereby providing a self-retaining lock.
    To release the carrier screw 94, a simple release cam tool, not shown, having a screwdriver-shaped end is used to deflect the spring arm 128 to the second position, in which the latch 142 is in contact with the side 138 of the first end portion 134 of FIG Spring arm 128 is so that the spring arm ratchet teeth 136 are released from the locking sleeve ratchet teeth 144.
    FIG. 8 is a perspective view of a second lock plate 800. The second lock plate 800 is an example structure for the lock plate 114 discussed above with reference to FIG. 3.
    The second locking plate 800 may function in a similar manner to that discussed above with respect to the first locking plate 400 illustrated in Figs. 4-7. The spring arm 128 of the second lock plate 800 includes the start portion 130, the middle portion 132, and a second end portion 834. The second end portion 834, illustrated in FIG. 8, may include a tool opening 839 to facilitate contact between the spring arm 128 and a cam tool Used to adjust the position of the spring arm 128 from a latched position in which the spring-arm ratchet teeth 136 are in engagement with the lock sleeve latch teeth 144 to a released position in which the spring-arm latch teeth 136 are disengaged from the lock position. sleeve ratchet teeth 144 are solved, and vice versa to vary.
    Like the first locking plate 400, the second locking plate 800 also includes a retaining feature sized to receive an upper surface 152 of the locking sleeve bottom portion 116. For example, the second locking plate 800 includes a second retaining feature 850. The second retaining feature 850 includes a second and third lip 850A and 850B. In the same manner as illustrated in FIG. 7 with respect to the first retention feature 150 of the first locking plate 400, each of the second and third lips 850A and 850B of the second retention feature 850 has a size for receiving an upper surface 152 of the locking sleeve bottom section 116 on.
    Accordingly, a locking plate 114 having either the structure of the first locking plate 400 or the second locking plate 800 allows the backing screw 94 to be repeatedly relaxed and tensioned while significantly reducing the need to replace or substantially modify the locking assembly 110 , However, occasionally, while relaxing the carrier screw 94, the locking sleeve 112 may move vertically with respect to the locking plate 114. As discussed above with reference to FIG. 7, retaining features, such as the lip 150 of the first locking plate 400 or the lips 850A and 850B of the second locking plate 800, overlap the bottom portion 116 of the locking sleeve 112. In a case where the Locking sleeve 112 raises with respect to the first locking plate 400, the locking sleeve Klin kenzähne 144, which are included in the bottom portion 116, in contact with the retaining feature of the first locking plate 400, the first retaining feature 150, pass. Also, in a case where the lock sleeve 112 raises with respect to the second lock plate 800, the lock sleeve latch teeth 144 may come into contact with the retention feature 850 of the second lock plate 800, the second and third lips 850A and 850B.
    Contact with the first retention feature 150, or either the second or third lip 850A and 850B, may cause at least some of the locking sleeve latch teeth 144 to be sheared off or otherwise damaged. This damage may require the replacement of the locking sleeve 112 to ensure proper operation of the locking assembly 110 necessary to ensure proper operation of the jet pump assembly 44. Replacing the locking sleeve 112 can be expensive and time consuming. Accordingly, it may be desirable to reduce the chances of damaging the locking sleeve latch teeth 144 by using a latch plate that prevents contact between a retention feature and the latch sleeve latch teeth 144. A locking plate according to example embodiments will now be discussed with reference to Figs. 9A-11 below.
    FIGS. 9A-9I illustrate various views of a third latch plate 900 according to at least one example embodiment. The third lock plate 900 is an example structure for the lock plate 114 illustrated in FIG. 3. FIGS. 9A and 9F-9I illustrate the third lock plate 900 from various perspective views. Fig. 9B illustrates a top view of the third latch plate 900. Fig. 9C illustrates a bottom view of the third latch plate 900. Fig. 9D illustrates a side view which is a 90 ° plan view illustrated in Fig. 9B around that illustrated in Fig. 9B CC axis is rotated. FIG. 9E illustrates a side view that is rotated 90 ° about the B-B axis illustrated in FIG. 9B, as illustrated in FIG. 9B. In Figs. 9A-9I, the third locking plate 900 is illustrated in a latched position. 10 illustrates a portion of the latch assembly 110 including, as the latch plate 114, the third latch plate 900 according to at least one example embodiment. In Fig. 10, the third locking plate 900 is illustrated in a released position. 11 is a cross-sectional view of the locking sleeve 112 and the spring arm 128 of the third locking plate 900 according to at least one example embodiment.
    With the exceptions discussed below, the third latch plate 900 may have the same interaction with the latch sleeve 112, structure, and operation as discussed above with reference to the first latch plate 400 illustrated in FIGS. 4-7.
    The spring arm 128 of the third lock plate 900 includes the start portion 130, the middle portion 132 and a third end portion 934. For example, the third end portion 934 may include a tool opening 839 to facilitate contact between the spring arm 128 and a cam tool, which is used to vary the position of the spring arm 128 from a latched position to a released position and vice versa. Optionally, the locking plate 900 may also have no cam tool opening 148.
    Further, the third locking plate 900 includes a third retaining feature 950 instead of the first retaining feature 150. The third retaining feature 950 may be, for example, a lip or protrusion extending inwardly from the end portion 934 of the spring arm 112 toward a center the third locking plate 900 extends. According to at least one example embodiment, at least a portion of the third retention feature 950 may be located between the spring arm ratchet teeth 136 and an outermost region 955 of the spring arm 128, with the outermost one
    Region 955 is a most extreme portion of the spring arm 128 with respect to a point in the starting region 130, at which the spring arm 128 adjoins the remaining portion of the third locking plate 900.
    As illustrated in FIG. 9D, an upper surface of the third retaining feature 950 may be positioned at a height D3 above a bottom 960 of the third locking plate 900. Further, a remaining portion of the spring arm 128 (eg, a portion of the spring arm 128 that does not include the third retaining feature 950) may include a top surface having a height D2 above the bottom 960 of the third locking plate 900. As illustrated in FIG. 9D, the height D2 may be less than the height D3 of an upper surface of the third retaining feature 950 and a lower surface of the third retaining feature 950. Further, a remaining portion of the third lock plate 900 (eg, a portion of the third lock plate 900 that does not include the spring arm 128) may have a top surface with a height D1 above the bottom 960 of the third lock plate 900. According to at least one example embodiment, D3> D2> D1. Accordingly, as illustrated in FIG. 9D, the third retention feature 950 may be positioned over both an upper surface of a remaining portion of the spring arm 128 and an upper surface of a remaining portion of the third locking plate 900.
    According to the invention, the third retention feature 950 is structured such that when the locking sleeve 112 is in the carrier screw opening 126 and the spring arm 128 is in a latched position, at least a portion of the third retention feature 950 will cover at least a portion of the bottom region 116 the locking sleeve 112 overlaps vertically; and, when the locking sleeve 112 is in the carrier screw opening 126 and the spring arm 128 is in the released position, there is no overlap between the third retaining feature 950 and the bottom region 116 of the locking sleeve 112 in the vertical direction. The latched position of the spring arm 128, for example, refers to a position in which the spring arm latch teeth 136 of the spring arm 128 engage or interlock with the latch sleeve latch teeth 144 of the latch sleeve 112. The disengaged position of the spring arm 128, for example, refers to a position in which the spring arm 128 is deflected such that the ratchet teeth 136 are not engaged or engaged with the locking sleeve ratchet teeth 144 of the locking sleeve 112. Thus, according to the invention, the third retention feature 950 has such a size and position on the spring arm 128 that the following conditions are met: 1) When the spring arm 128 of the third locking plate 900 is in the latched position, the third retention feature is established 950 engaged with an upper surface 152 of the lock sleeve bottom portion 116, in the same manner as illustrated in FIG. 7 with respect to the first retention feature 150 of the first locking plate 400; and 2) when the spring arm 128 of the third locking plate 900 is in the released position, the third retaining feature 950 does not engage or overlap the upper surface 152 of the locking sleeve bottom portion 116 in the vertical direction, and There is a horizontal gap 970 between the upper surface 152 and the retaining feature 950 as shown in Figs.
    The positioning of the third retaining feature 950 on the spring arm 128 illustrated in Figs. 9A-11 and its size are provided as an example only. According to at least one example embodiment, the retention feature 950 may include any combination of positioning on the spring arm 128 and size that allows the retaining feature 950 to move with the end portion 936 of the spring arm 128 such that when the locking sleeve 112 in the carrier screw opening 126 of FIG third locking feature 900, the third retaining feature 950 overlaps the bottom portion 116 of the locking sleeve 112 when the spring arm 128 is in the latched position, and the retaining feature 950 does not overlap the bottom portion 116 of the locking sleeve 112 when the spring arm 128 is in the released position located.
    Accordingly, using the third locking plate 900, during a relaxation operation in which the spring arm 128 is deflected to the released position, there is no overlap in the vertical direction between the third retaining feature 950 and the bottom portion 116 of the locking sleeve 112, as in FIG FIGS. 10 and 11 illustrate. Thus, in the event that the locking sleeve 112 moves vertically during the relaxation operation, the chances of the third locking plate 900 shearing off or otherwise damaging the sleeve latch teeth 144 or other portion of the bottom portion 116 of the locking sleeve 112 can be significantly reduced. Accordingly, the lost time and effort associated with repairing or replacing the damaged locking sleeve 112 by using the third locking plate 900 according to example embodiments may be avoided.
    权利要求:
    Claims (6)
    [1]
    A locking plate (114, 400, 800, 900) for a locking device of a jet pump carrier (86), the locking device comprising a locking sleeve (112) having a bore (120) extending from a first end to a second end of the locking sleeve (112 ), and a lower portion having a plurality of locking sleeve latch teeth (144) around the periphery of the latch sleeve (112), the latch plate (114, 400, 800, 900) comprising: an opening (126) having a Size for receiving the locking sleeve (112); a latch (142); and an integral spring arm (128) including: a plurality of spring-arm latch teeth (136), wherein the plurality of latch arm ratchet teeth (136) extend from at least a portion of a side of the spring arm (128) that is the one Center of the opening (126), extend from and have such a size that they can engage with the locking sleeve ratchet teeth (144), and a retaining feature (950) extending from at least a portion of one side of the spring arm (128) extends in the direction of the center of the opening (126), and a notch (140) at an end portion (134), wherein the integral spring arm (128) is structured such that the spring arm i) a latched position in which the locking sleeve ( 112) in the opening (126), at least a portion of the retaining feature (950) overlaps an upper surface (152) of the lower portion of the locking sleeve (112) and in which the detent (142) in the notch (14 0) and the spring-arm ratchet teeth (136) engage the locking sleeve latch teeth (144), and ii) a disengaged position wherein the latch sleeve (112) is in the opening (126), the retaining feature (FIG. 950) does not overlap the upper surface and the spring-arm ratchet teeth (136) are disengaged from the locking sleeve pawl teeth (144).
    [2]
    The latch plate (114, 400, 800, 900) of claim 1, wherein at least a portion of the retaining feature (950) is located at a position on the spring arm (128) between a position of the spring arm latch teeth (136) on the spring arm (128 ) and an extreme end of the spring arm (128) opposite one end of the spring arm (128), at which the spring arm (128) adjoins the remainder of the locking plate (114, 400, 800, 900).
    [3]
    A locking device for a jet pump carrier (86), the jet pump carrier (86) including a carrier screw (94) having a head (96), the locking device comprising: a locking sleeve (112) having a bore (120) extending from extending a first end to a second end of the locking sleeve (112) and fittingly receives the head (96) of the carrier screw (94), and having a lower portion having a plurality of locking sleeve ratchet teeth (144) around the periphery of the locking sleeve (112); a locking plate (114, 400, 800, 900) including: an aperture (126) sized to receive the locking sleeve (112), a detent (142), and an integral spring arm (128) including: a plurality of spring-arm ratchet teeth (136), wherein the plurality of spring-arm ratchet teeth (136) of at least a portion of a side of the spring arm (128) facing the center of the opening (126) 1, a retention feature (950) extending from at least a portion of one side of the spring arm (128) toward the center of the opening (126). extends, and a notch (140) at one end portion (134), wherein the integral spring arm (128) is structured such that the spring arm i) a latched position, in which the locking sleeve (112) is in the opening (126) at least a portion of the retaining feature (950) overlaps an upper surface of the lower portion of the locking sleeve (112), and in which the detent (142) is positioned in the notch (140) and the spring-arm ratchet teeth (136) engage the Locking sleeve ratchet teeth (144) are, and ii) a released position in which the locking sleeve (112) in the opening (126) and the retaining feature (150, 850, 950) is not the upper surface ü overlapped and the spring arm ratchet teeth (136) are released from the locking sleeve latch teeth (144) can take.
    [4]
    4. The locking device of claim 3, wherein at least a portion of the retaining feature (950) at a position on the spring arm (128) between a position of the spring arm ratchet teeth (136) on the spring arm (128) and an extreme end of the spring arm (128) opposite one end of the spring arm (128) at which the spring arm (128) adjoins the remainder of the locking plate (114, 400, 800, 900) is located.
    [5]
    A jet pump assembly (44) comprising: a riser (36); at least one inlet mixer (40); at least one diffuser (42) coupled to the at least one inlet mixer (40); a transition assembly, including at least two support arms, wherein the riser (36) is coupled by the transition assembly to the at least one inlet mixer (40); a jet pump support (86) extending between two of the at least two support arms, the jet pump support (86) including a threaded screw aperture (106); a carrier screw (94) extending through and threadedly engaged with the screw aperture (106); and a locking device, the locking device including: a locking sleeve (112) having a bore (120) extending from a first end to a second end of the locking sleeve (112) and mating with the head (96) of the backing screw (94) and a lower portion having a plurality of locking sleeve ratchet teeth (144) around the periphery of the locking sleeve (112), a locking plate (114, 400, 800, 900) including: an opening (126) sized for Receiving the latch sleeve (112), a detent (142), and an integral spring arm (128) including: a plurality of spring arm latch teeth (136), the plurality of spring arm latch teeth (136) extending from at least a portion of one side of the latch Spring arm, the center of the opening (126) facing, extend from and have a size such that it with the locking sleeve ratchet teeth (144) inei a retaining feature (950) extending from at least a portion of one side of the spring arm (128) toward the center of the opening (126) and a notch (140) at an end portion (134), the integral spring arm (14). 128) is structured such that the spring arm (128) i) a latched position in which the latch sleeve (112) is in the aperture (126), at least a portion of the retaining feature (950) has a top surface (152) of the lower portion Portion of the locking sleeve (112) overlaps, and in which the detent (142) is positioned in the notch (140) and the spring arm ratchet teeth (136) engage the locking sleeve latch teeth (144), and ii) a disengaged position in that the locking sleeve (112) is in the opening (126) and the retaining feature (950) does not overlap the upper surface and the spring-arm ratchet teeth (136) are disengaged from the locking sleeve ratchet teeth (144) can.
    [6]
    The jet pump assembly (44) of claim 5, wherein at least a portion of the retaining feature (950) is located at a position on the spring arm (128) between a position of the spring arm ratchet teeth (136) on the spring arm (128) and an extreme end of the spring arm Spring arm (128) opposite one end of the spring arm (128), at which the spring arm (128) connects to the rest of the locking plate (114, 400, 800, 900) is located.
    类似技术:
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    同族专利:
    公开号 | 公开日
    US9330797B2|2016-05-03|
    ES2547131R1|2016-03-23|
    US20140177778A1|2014-06-26|
    JP2016505135A|2016-02-18|
    WO2014133640A3|2014-11-13|
    JP6307094B2|2018-04-04|
    ES2547131B2|2017-05-25|
    FI127066B|2017-10-31|
    WO2014133640A2|2014-09-04|
    ES2547131A2|2015-10-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5515407A|1994-08-25|1996-05-07|Westinghouse Electric Corporation|Jet pump assembly for recirculating coolant through a recirculation loop of a boiling water reactor vessel|
    US6434208B1|2001-01-31|2002-08-13|General Electric Company|Jet pump beam lock|
    JP2005233864A|2004-02-23|2005-09-02|Toshiba Corp|Jet pump for nuclear reactor|
    US7764760B2|2004-12-23|2010-07-27|General Electric Company|Apparatus and method for measuring rotation during jet pump tensioning|
    US7596200B2|2005-03-28|2009-09-29|General Electric Company|Method and apparatus for repairing a jet pump riser brace to reactor vessel pad attachment in a nuclear reactor|
    US7896302B2|2007-10-11|2011-03-01|Ge-Hitachi Nuclear Energy Americas Llc|Jet pump sensing line T-bolt clamp assembly|
    JP5426117B2|2008-07-07|2014-02-26|株式会社東芝|Bolt fixing device for jet pump beam|
    法律状态:
    2017-03-15| NV| New agent|Representative=s name: GENERAL ELECTRIC TECHNOLOGY GMBH GLOBAL PATENT, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/726,961|US9330797B2|2012-12-26|2012-12-26|Jet pump beam weldless keeper lock plate|
    PCT/US2013/075078|WO2014133640A2|2012-12-26|2013-12-13|Jet pump beam weldless keeper lock plate|
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