Drive shaft and control rod hydraulic drive system
阅读说明:本技术 驱动轴及控制棒水压驱动系统 (Drive shaft and control rod hydraulic drive system ) 是由 薄涵亮 *** 姜胜耀 赵陈儒 秦本科 王金海 刘潜峰 于 2020-07-31 设计创作,主要内容包括:本发明涉及核反应堆工程技术领域,提供的驱动轴及控制棒水压驱动系统。驱动轴包括:外轴、轴芯和连接装置,外轴包括卡槽段,轴芯设于所述外轴内,轴芯适于沿所述外轴的轴向移动;连接装置包括连接于所述外轴的下端的连接件、连接于所述轴芯的下端的移动件,所述连接件上连接有多个夹持件,所述轴芯通过带动所述移动件沿所述外轴的移动,以驱动多个所述夹持件在相互收紧的夹持位置与相互远离的打开位置之间切换。本发明的驱动轴及控制棒水压驱动系统,设置外轴、轴芯和连接装置,通过轴芯移动可带动连接装置动作,连接装置可与控制棒进行拆装,满足反应堆换料状态控制棒与驱动轴能够远距离对接、远距离拆装的需求,为反应堆换料操作提供技术支撑。(The invention relates to the technical field of nuclear reactor engineering, and provides a driving shaft and a control rod hydraulic driving system. The drive shaft includes: the outer shaft comprises a clamping groove section, the shaft core is arranged in the outer shaft, and the shaft core is suitable for moving along the axial direction of the outer shaft; the connecting device comprises a connecting piece connected to the lower end of the outer shaft and a moving piece connected to the lower end of the shaft core, wherein the connecting piece is connected with a plurality of clamping pieces, the shaft core drives the moving piece to move along the outer shaft so as to drive the clamping pieces to be switched between clamping positions which are mutually tightened and opening positions which are mutually far away. The driving shaft and the control rod hydraulic driving system are provided with the outer shaft, the shaft core and the connecting device, the connecting device can be driven to act through the movement of the shaft core, and the connecting device can be disassembled and assembled with the control rod, so that the requirements of remote butt joint and remote disassembly and assembly of the control rod and the driving shaft in a reactor refueling state are met, and technical support is provided for reactor refueling operation.)
1. A drive shaft, comprising:
an outer shaft comprising a slot section;
the shaft core is arranged in the outer shaft and is suitable for moving along the axial direction of the outer shaft;
the connecting device comprises a connecting piece connected to the lower end of the outer shaft and a moving piece connected to the lower end of the shaft core, wherein the connecting piece is connected with a plurality of clamping pieces, the shaft core drives the moving piece to move along the outer shaft so as to drive the clamping pieces to be switched between clamping positions which are mutually tightened and opening positions which are mutually far away.
2. The drive shaft of claim 1, wherein a plurality of restoring members are disposed between the shaft core and the outer shaft, one end of each restoring member is fixed to the shaft core, the other end of each restoring member is fixed to the outer shaft, and the restoring force of each restoring member is used to drive the moving member to move so as to restore the clamping members from the open position to the clamping position; at least one said restoring member is disposed proximate to said connecting means and at least one said restoring member is disposed proximate to an upper end of said core.
3. The drive shaft according to claim 1, wherein the shaft core comprises a shaft body and a mounting and dismounting sleeve fixed to an upper end of the shaft body, a groove is formed in the outer shaft, an expansion ring is arranged in the groove, and the outer shaft and the mounting and dismounting sleeve are locked by the expansion ring; install and remove the upper end of cover and be equipped with the constant head tank, the lower extreme of installing and removing the cover is equipped with spacing step, the lower extreme of expander be spacing in spacing step, install and remove the cover and be located the surface of expander upper end with be equipped with the circumferential weld between the internal surface of outer axle.
4. The driving shaft according to claim 1, wherein the outer shaft includes a limiting groove, a first optical axis section located at an upper end of the clamping groove section, and a second optical axis section located at a lower end of the clamping groove section, the clamping groove section includes a first pawl recognizing section and a second pawl recognizing section, the first pawl recognizing section includes a first groove body, the second pawl recognizing section includes a second groove body, and a length of the first groove body is greater than a length of the second groove body along an axial direction of the clamping groove section;
the limiting groove is located between the clamping groove section and the second optical axis section, and the length of the limiting groove in the axial direction of the clamping groove section is larger than or equal to twice the stepping length of the driving shaft.
5. The driving shaft according to claim 1, wherein a buffer lock is fixedly connected to the outer shaft, the buffer lock is located below the slot section, the buffer lock includes an upper lock body, a lower lock body, and a roller, the upper lock body is fixed to the lower lock body, the roller is disposed on an outer wall of the upper lock body and/or the lower lock body, and a gap is disposed between an inner wall of the lower lock body and an outer wall of the outer shaft.
6. The drive shaft of claim 2, wherein the outer shaft is divided into a plurality of sections of shaft members along the axial direction of the outer shaft, and the adjacent sections of shaft members are connected through threads and are limited circumferentially through fasteners;
the inner wall of the outer shaft is fixedly connected with a lock sleeve for axially limiting the restoring piece, and a gap is formed between the lock sleeve and the outer wall of the shaft core; the lock sleeve is fixed in through running through the round pin axle of outer axle the outer axle, and/or, the lock sleeve passes through the convex step of inner wall of outer axle carries out the axial spacing.
7. The drive shaft according to claim 2, wherein the shaft core comprises a first shaft section and a plurality of second shaft sections, two of the second shaft sections are connected by the first shaft section, an outer diameter of the first shaft section is smaller than an outer diameter of the second shaft section, and the second shaft section is sleeved with the restoring member;
and one end of the second shaft section is in threaded connection with a positioning block for axially limiting the restoring piece, and the positioning block and the second shaft section are limited circumferentially through a fastening piece.
8. The drive spindle of any one of claims 1 to 7, wherein a first end of the clamping member is provided with a first surface and a second end of the clamping member is provided with a second surface, the first surface forming an angle with the second surface, the moving member pressing against the first surface in the clamping position and the moving member pressing against the second surface in the open position;
and/or the connecting piece comprises a plurality of positioning parts which are sleeved outside the connecting shaft of the control rod, and the end parts of the positioning parts are provided with guide surfaces for guiding the connecting shaft to be inserted into the connecting piece.
9. The drive shaft according to claim 8, wherein a protrusion is provided on an outer side of the positioning portion, and the moving member is retained by the protrusion in the clamping position;
and/or, the connecting piece is including being used for restricting the spacing portion of connecting axle axial position, spacing portion connect in location portion is inboard, the connecting axle butt in spacing portion.
10. A control rod hydraulic drive system, comprising: the driving shaft of any one of claims 1 to 9, the driving mechanism is arranged outside the clamping groove section, the buffer cylinder is sleeved outside a buffer lock on the driving shaft, and the control rod is clamped and fixed or loosened and detached through the clamping piece.
Technical Field
The invention relates to the technical field of nuclear reactor engineering, in particular to a driving shaft and a control rod hydraulic driving system.
Background
The hydraulic driving technology for control rod in nuclear reactor is a built-in control rod driving technology, and its driving mechanism is placed in the high-temp, high-pressure and irradiation environment of reactor pressure container, and adopts three hydraulic cylinders to drive and transfer and clamp two sets of control rod assemblies in turn so as to implement the functions of raising, lowering and dropping control rod assemblies.
Based on the working principle of a driving mechanism and the structural characteristics of the control rod of the advanced small water reactor with the thermal power of 50-300MW, the structure of the driving shaft not only needs to be matched with the action of a pin and pawl mechanism of the driving mechanism to solve the problems of deviation of initial zero position and limit of collision, but also needs to solve the problems of disassembly and assembly of the control rod and the driving shaft so as to meet the requirements of processing and transportation; it is also desirable to be able to remotely disassemble and assemble the control rod to meet the requirements for refueling. How to design the driving shaft structure to solve the problems and make the control rod built-in water pressure driving technology realize engineering application on advanced small water reactors with the thermal power of 50-300MW, which troubles technicians.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a driving shaft which is provided with an outer shaft, a shaft core and a connecting device, wherein the connecting device can be driven to act through the movement of the shaft core, the connecting device can be disassembled and assembled with a control rod, the requirements that the control rod and the driving shaft can be in remote butt joint and remote disassembly and assembly in a reactor refueling state are met, and the technical support is provided for the reactor refueling operation.
The invention also provides a hydraulic control rod driving system.
A drive shaft according to an embodiment of the first aspect of the invention includes:
an outer shaft comprising a slot section;
the shaft core is arranged in the outer shaft and is suitable for moving along the axial direction of the outer shaft;
the connecting device comprises a connecting piece connected to the lower end of the outer shaft and a moving piece connected to the lower end of the shaft core, wherein the connecting piece is connected with a plurality of clamping pieces, the shaft core drives the moving piece to move along the outer shaft so as to drive the clamping pieces to be switched between clamping positions which are mutually tightened and opening positions which are mutually far away.
According to an embodiment of the invention, a restoring member is disposed between the shaft core and the outer shaft, one end of the restoring member is fixed to the shaft core, the other end of the restoring member is fixed to the outer shaft, and the restoring force of the restoring member is used to drive the moving member to move, so that the clamping member is restored to the clamping position from the open position.
According to one embodiment of the invention, said restoring members are arranged in plurality in the axial direction of said core, at least one of said restoring members being located close to said connecting means, and at least one of said restoring members being located close to the upper end of said core.
According to one embodiment of the invention, the shaft core comprises a shaft body and a mounting and dismounting sleeve fixed at the upper end of the shaft body, a groove is formed in the outer shaft, an expansion ring is arranged in the groove, the outer shaft and the mounting and dismounting sleeve are locked through the expansion ring, and the relative positions of the shaft core and the outer shaft are locked; install and remove the upper end of cover and be equipped with the constant head tank, the lower extreme of installing and removing the cover is equipped with spacing step, the lower extreme of expander be spacing in spacing step, install and remove the cover and be located the surface of expander upper end with be equipped with the circumferential weld between the internal surface of outer axle. A instrument for dismouting outer axle and axle core can insert in the circumferential weld and insert the expander and install and remove between the cover, removes the expander to installing and removing the spacing of cover for the axle core can remove for the outer axle, and then the holder can be opened to the open position from the centre gripping position.
According to one embodiment of the invention, the outer shaft comprises a clamping groove section, a first optical axis section located at the upper end of the clamping groove section and a second optical axis section located at the lower end of the clamping groove section, the clamping groove section comprises a first claw identifying section and a second claw identifying section, the first claw identifying section comprises a first groove body, the second claw identifying section comprises a second groove body, and the length of the first groove body is greater than that of the second groove body along the axial direction of the clamping groove section.
According to an embodiment of the present invention, the outer shaft includes a stopper groove between the catch groove section and the second optical axis section, and a length of the stopper groove in an axial direction of the catch groove section is greater than or equal to twice the drive shaft step length.
According to one embodiment of the present invention, a buffer lock is fixedly connected to the outer shaft, the buffer lock is located below the slot section, the buffer lock includes an upper lock body, a lower lock body and a roller, the upper lock body is fixed to the lower lock body, the roller is disposed on an outer wall of the upper lock body and/or the lower lock body, and a gap is disposed between an inner wall of the lower lock body and an outer wall of the outer shaft.
According to one embodiment of the invention, the outer shaft is divided into a plurality of sections of shaft parts along the axial direction of the outer shaft, and the adjacent two sections of shaft parts are connected through threads and are limited circumferentially through fasteners;
the inner wall of the outer shaft is fixedly connected with a lock sleeve for axially limiting the restoring piece, and a gap is formed between the lock sleeve and the outer wall of the shaft core; the lock sleeve is fixed in through running through the round pin axle of outer axle the outer axle, and/or, the lock sleeve passes through the convex step of inner wall of outer axle carries out the axial spacing.
According to one embodiment of the invention, the shaft core comprises a first shaft section and a plurality of second shaft sections, the two second shaft sections are connected through the first shaft section, the outer diameter of the first shaft section is smaller than that of the second shaft sections, and the restoring piece is sleeved on the outer side of the second shaft sections;
and one end of the second shaft section is in threaded connection with a positioning block for axially limiting the restoring piece, and the positioning block and the second shaft section are limited circumferentially through a fastening piece.
According to an embodiment of the invention, a first end of the clamping member is provided with a first surface, a second end of the clamping member is provided with a second surface, the first surface and the second surface form an included angle, in the clamping position, the moving member presses the first surface, and in the opening position, the moving member presses the second surface.
According to one embodiment of the invention, the connecting piece comprises a plurality of positioning parts which are sleeved outside the connecting shaft of the control rod, and the end parts of the positioning parts are provided with guide surfaces for guiding the connecting shaft to be inserted into the connecting piece.
According to one embodiment of the present invention, a protrusion is disposed on an outer side of the positioning portion, and the moving member is limited to the protrusion at the clamping position.
According to one embodiment of the invention, the connecting piece comprises a limiting part used for limiting the axial position of the connecting shaft of the control rod, the limiting part is connected to the inner side of the positioning part, and the connecting shaft abuts against the limiting part.
A control rod hydraulic drive system according to an embodiment of a second aspect of the present invention includes: the driving mechanism is arranged on the outer side of the clamping groove section, the buffer cylinder is sleeved on the outer side of a buffer lock on the driving shaft, and the control rod is clamped, fixed or loosened and detached through the clamping piece.
One or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:
the driving shaft comprises an outer shaft, a shaft core and a connecting device, wherein a moving part of the connecting device is connected to the shaft core, a connecting part of the connecting device is connected to the outer shaft, and a clamping part is rotatably connected to the connecting part; the outer axle keeps fixed, and the axle core removes for outer axle, and then the moving member removes along with the axle core, and the moving member removes the in-process and can drive the holder and rotate the regulation, and the holder switches between the clamping position of drawing in each other and the open position of keeping away from each other, can make the connecting axle of holder centre gripping control rod or loosen the connecting axle, and then realize the dismouting of drive shaft and control rod.
The driving shaft of the embodiment realizes the detachable connection of the control rod and the driving shaft, realizes the engineering and the productization, ensures the engineering application of the control rod built-in water pressure driving technology, is one of the series engineering implementation technologies of the control rod built-in driving technology, and mainly meets the engineering application of the control rod built-in water pressure driving technology. Based on the working principle of a driving mechanism and the structural characteristics of the control rod of the advanced small water reactor with the thermal power of 50-300MW, the requirement that the control rod and the driving shaft can be separated is met, so that the requirements of large-size processing and transportation are met; meanwhile, the connecting device enables the control rod and the driving shaft to be firmly connected, meets the requirements of long-distance butt joint and long-distance disassembly and assembly of the control rod and the driving shaft in the reactor refueling state, and provides technical support for reactor refueling operation.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic perspective view of a drive shaft according to an embodiment of the present invention;
FIG. 2 is a schematic front view of a drive shaft provided in accordance with an embodiment of the present invention;
FIG. 3 is a cross-sectional structural schematic view of a drive shaft provided by an embodiment of the present invention;
FIG. 4 is a schematic view of a portion A of FIG. 1;
FIG. 5 is a partially enlarged view of the portion B in FIG. 3;
FIG. 6 is a partial enlarged view of the portion C in FIG. 3;
FIG. 7 is a schematic view of a portion I of FIG. 1;
FIG. 8 is a cross-sectional structural schematic view of a drive shaft provided in accordance with an embodiment of the present invention; the difference from fig. 3 is that the structure of the slot segments is significantly shortened and the relative positions of the two repetitions are illustrated;
FIG. 9 is a schematic structural view taken at section D-D of FIG. 8, showing the shaft core and the first sleeve;
FIG. 10 is an enlarged partial view of the portion E in FIG. 8;
FIG. 11 is a schematic structural view of an expander of a drive shaft provided by an embodiment of the present invention;
FIG. 12 is a schematic structural view of a first shaft member of the drive shaft provided by the embodiment of the present invention;
FIG. 13 is a cross-sectional structural view of the first shaft member of the driveshaft provided in accordance with an embodiment of the present invention; each function section of the card slot section is divided in the figure;
FIG. 14 is an enlarged partial view of the portion F of FIG. 13;
FIG. 15 is an enlarged partial view of the structure of FIG. 13 at H;
FIG. 16 is a schematic cross-sectional view of a drive mechanism for use with a drive shaft provided in accordance with an embodiment of the present invention;
FIG. 17 is a schematic structural view of a control rod to which the drive shaft is adapted to be connected according to an embodiment of the present invention.
Reference numerals:
1: an outer shaft; 11: a first shaft member; 111: expanding rings; 12: a second shaft member; 13: a third shaft member; 131: a first chute;
14: a slot clamping section; 141: a first claw recognizing section; 1411: a claw recognizing section is transmitted; 1412: clamping a claw recognizing section; 1413: a first tank body; 1414: a first flute; 1415: a first upper section; 1416: a third connection section; 1417: a first lower section; 1418: a first connection section; 142: a second claw recognizing section; 1421: short section; 1422: a long section; 1423: a second tank body; 1424: a second flute; 1425: a second upper section; 1426: a fourth connection section; 1427: a second lower section; 1428: a second connection section;
15: a first optical axis segment; 16: a limiting groove; 17: a second optical axis segment; 18: a first lock sleeve; 181: a fourth fixing pin; 182: a locking bar; 19: a second lock sleeve;
2: a shaft core; 21: a shaft body; 211: a first positioning block; 212: a first fixing pin; 213: a second fixing pin; 214: a second positioning block; 215: a third positioning pin; 216: a limiting sleeve; 22: assembling and disassembling the sleeve; 221: positioning a groove;
3: a connecting device; 31: a connecting member; 311: a positioning part; 3111: a guide surface; 312: a limiting part; 313: a projection; 314: rotating the connecting piece; 32: a clamping member; 321: a first surface; 322: a second surface; 323: a clamping part; 33: a moving member; 331: a second chute; 332: a first fastener;
4: a recovery member; 41: a shaft spring; 42: a locking spring;
5: a buffer lock; 51: an upper lock body; 52: a lower lock body; 53: a roller;
6: a drive mechanism; 61: a lift cylinder; 62: a transfer cylinder; 63: a clamping cylinder; 64: a transfer claw; 65: a gripper jaw;
7: a control rod; 71: a connecting shaft; 711: a groove;
a: a first length; b: a second length.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
One embodiment of the present invention, as shown in fig. 1 to 17, provides a drive shaft including: an outer shaft 1, a
When the control rod 7 needs to be connected with the drive shaft, the
Wherein the end of the control rod 7 connected to the drive shaft is understood to be the lower end, and the upper end of the drive shaft is close to the upper end of the reactor pressure vessel. The connecting shaft 71 is provided with a groove 711, and the clamping
Based on the working principle of a driving mechanism and the structural characteristics of the control rod of the advanced small water reactor with the thermal power of 50-300MW, the requirement that the control rod and the driving shaft can be separated is met, so that the requirements of large-size processing and transportation are met; meanwhile, the connecting
The drive shaft of the embodiment realizes the detachable connection of the control rod 7 and the drive shaft, realizes engineering and productization, ensures the engineering application of the control rod built-in water pressure drive technology, is one of the series engineering implementation technologies of the control rod built-in drive technology, mainly meets the engineering application of the control rod built-in water pressure drive technology, and provides a choice for the engineering design of remote detachable connection structures in other industrial fields. Wherein, referring to fig. 17, the control rods 7 may be cross wing control rods.
An example of the structure of the outer shaft 1 to be fitted to the
In one embodiment, a restoring member 4 is disposed between the
When the clamping
Wherein, the return element 4 can be an elastic element, such as a spring, an elastic air bag, etc. The restoring piece 4 is sleeved on the outer side of the
In one embodiment, the restoring members 4 are provided in plurality in the axial direction of the
When the nuclear reactor is operated to the later stage (close to the design life of the nuclear reactor), the restoring force of the restoring piece close to the control rod 7 can be reduced by 60-70%, so that other restoring pieces are required to be far away from the control rod 7 as far as possible, the loss of nuclear radiation to parts is reduced, and the normal operation of the nuclear reactor at the later stage is ensured.
Referring to fig. 8, the restoring member 4 is provided with two, respectively, a
In one embodiment, referring to fig. 7 and 11, the
The upper end of the assembling and disassembling sleeve 22 is provided with a positioning groove 221, the positioning groove 221 is positioned above the outer shaft, the positioning groove 221 is used for fixing a tool for disassembling the outer shaft 1 and the
When the
The assembly and disassembly sleeve 22 is fixedly connected with the
In one embodiment, the outer shaft 1 is provided with a step therein, the lower end of the sleeve 22 is retained by the step, and the upper end of the sleeve 22 extends out of the outer shaft 1. The lower end of the assembling and disassembling sleeve 22 is used for positioning the relative position of the outer shaft 1 and the
An example of the structure of the outer shaft 1 is provided below.
In one embodiment, the outer shaft 1 includes a
The
The principle of the movement of the drive shaft in the ascending process is the same as that in the descending process, and the driving mechanism 6 is used to drive the drive shaft to ascend. When the transmission claw 64 is in a first grasping position (at this time, the holding claw 65 is in a second unlocking position) that is grasped and fixed with the groove body (the
Wherein, the motion process of drive shaft is step motion, and the distance of once rising is a step length, namely: the holding claw 65 holds the next tank body next to the previous tank body between one ascending movement and the next ascending movement of the drive shaft. It should be noted that the structure, shape and size of the transmission claw 64 and the clamping claw 65 are generally the same, so that the grooves at different positions in the axial direction of the driving shaft can simultaneously meet the clamping requirements of the transmission claw 64 and the clamping claw 65.
In the driving shaft of the embodiment, the groove bodies include a
According to the driving shaft of the embodiment, the first claw identifying section 141 and the second claw identifying section 142 are arranged, so that the transmission claw 64 and the clamping claw 65 of the driving mechanism 6 can stably grasp the driving shaft, the problem of initial zero position deviation between the driving shaft and a pin claw is solved, and the performance and the reliability of the driving mechanism 6 are improved.
Referring to fig. 13, the first optical axis section 15 is located above the
In one embodiment, referring to fig. 13 and 15, the outer shaft 1 includes a limiting
Referring to fig. 13 and 15, the transferring claw 64 is located above the clamping claw 65, when the driving shaft is raised to the highest position, that is, the clamping claw 65 is located at the lowest position of the clamping
It should be noted that, if the holding claw 65 is located above the transfer claw 64, when the driving shaft is raised to the highest position, the transfer claw 64 is located at the lowest position of the
In one embodiment, as shown in fig. 13 and 14, the
The first length a and the second length b can be understood as a stepping length, and the first claw identifying section 141 and the second claw identifying section 142 have the same stepping length, so that the same stepping length of the driving shaft is ensured, the transmission claw 64 and the clamping claw 65 can accurately enter the groove body, and the problem of dislocation between the claw and the groove is avoided.
In one embodiment, the length of the first connecting
When the
In one embodiment, as shown with reference to fig. 13 and 14, the
When the groove body is an annular groove, the third connecting
Wherein, along the axial direction of the
In one embodiment, as shown in fig. 13 and 14, the
The plurality of transmission claws 64 and the plurality of holding claws 65 are arranged in the circumferential direction of the driving mechanism 6, the
Certainly, the
In one embodiment, the surfaces of the first
In one embodiment, referring to fig. 13, the first gripper segment 141 includes a transfer gripper segment 1411 corresponding to the transfer gripper 64 and a gripper segment 1412 corresponding to the gripper 65, the gripper segment 1412 has a short segment 1421 and a long segment 1422 of the second gripper segment 142 at two ends, respectively, and the short segment 1421 is located between the transfer gripper segment 1411 and the gripper segment 1412. When the driving shaft is at a lower position, the transfer claw section 1411 corresponds to the position of the transfer claw 64, and the clamping claw section 1412 corresponds to the position of the clamping claw 65, so that the transfer claw 64 and the clamping claw 65 can be accurately clamped in the
The length of the second gripper segment 142 between the transfer gripper segment 1411 and the gripper segment 1412 may be set as needed, and as shown in fig. 13, the distance between the transfer gripper segment 1411 and the gripper segment 1412 is not large, the length of the second gripper segment 142 between the transfer gripper segment 1411 and the gripper segment 1412 is short and may be referred to as a short segment 1421, and the length of the second gripper segment 142 between the gripper segment 1412 and the
In one embodiment, referring to fig. 1 to 5, a
In one embodiment, the outer shaft 1 comprises a
In addition, the length of the driving shaft of the embodiment is long enough, the
In one embodiment, as described with reference to fig. 4 and 5, the
In one embodiment, the outer shaft is divided into a plurality of sections of shaft parts along the axial direction of the outer shaft, the adjacent two sections of shaft parts are connected through threads and limited circumferentially through fasteners, the axial length of a single part can be shortened through the plurality of sections of shaft parts, the processing and the transportation are convenient, the connecting mode between the shaft parts at two ends is simple, the disassembly and the assembly are convenient, and the cost is reduced. Wherein, the fastener can be screw, nut isotructure.
In one embodiment, when the outer shaft 1 includes a
In one embodiment, a locking sleeve for axially limiting the restoring piece is fixedly connected to the inner wall of the outer shaft, so that the outer shaft can axially limit the restoring piece. A gap is arranged between the lock sleeve and the outer wall of the shaft core, so that the shaft core is prevented from rubbing, and the smooth movement of the shaft core is ensured.
The locking sleeve and the outer shaft can be fixed in various ways, and the following two connection ways can be adopted, but the locking sleeve and the outer shaft are not limited to the following connection ways. The lock sleeve can be fixed on the outer shaft through a pin shaft penetrating through the outer shaft, so that the lock sleeve is stable in fixation and convenient to disassemble and assemble; the lock sleeve can also carry out axial spacing through the convex step of the inner wall of the outer shaft, has simple structure and needs to be matched with the structure of the shaft core.
Wherein, the number of the lock sleeves is the same as that of the return pieces. Referring to the above embodiment, the return member includes a shaft spring and a bolt, and the lock sleeve includes a first lock sleeve and a second lock sleeve.
In one embodiment, the
In one embodiment, one end of the second shaft section is in threaded connection with a positioning block for axially limiting the restoring piece, the positioning block and the second shaft section are circumferentially limited through a fastener, the positioning block is simple and convenient to fix, the assembly and disassembly are convenient, and the fixing stability of the positioning block and the shaft core is effectively guaranteed.
In one embodiment, the
Referring to fig. 8 to 10, the lower end of the
An embodiment of the connecting
In one embodiment, as shown in fig. 1 to 3, 6 and 7, a first end of the holding
The
In one embodiment, as shown in fig. 1 to 3, 6 and 7, the
The
In one embodiment, the guide surface 3111 is formed as an arc surface to form an open structure at the end of the
Wherein the arc surface is a spherical surface, the guiding effect of the spherical surface is good, and the contact resistance is reduced. The
Of course, the guide surface 3111 is not limited to an arc surface, but may be an inclined plane, and the end of the connecting
In one embodiment, the outer side of the
The protrusion 313 in this embodiment, together with the first sliding
In one embodiment, the
The
In one embodiment, the clamping
In one embodiment, as shown in fig. 6 and 7, the moving
In the open position, the
In one embodiment, the moving
The second sliding
In one embodiment, the clamping
In another aspect of the present invention, a hydraulic control rod driving system is provided, which includes a driving mechanism, a control rod, a buffer cylinder and a driving shaft as in the above embodiments, wherein the driving mechanism is disposed outside the slot section, the buffer cylinder is sleeved outside the buffer lock on the driving shaft, and the control rod is clamped, fixed or released and removed by a clamping member. The control rod hydraulic drive system comprises the drive shaft in the above embodiment, which has all the advantages of the above embodiment, and will not be described herein again.
The driving mechanism is arranged on the outer side of the clamping groove section and is fixedly grabbed with the groove body of the clamping groove section through a pin claw of the driving mechanism, and the stepping movement of the driving shaft is realized. The outside of drive shaft is located to the buffer cylinder cover to in the buffer lock was located the buffer cylinder, the drive shaft descends the in-process, and the speed limit is carried out and is braked through the damping resistance in the buffer cylinder to the buffer lock. The control rod is connected in the lower extreme of drive shaft, and the control rod can be dismantled with the drive shaft and be connected, satisfies reactor reloading state control rod and the demand that the drive shaft can long-range butt joint, long-range dismouting, provides technical support for reactor reloading operation.
Wherein, referring to FIG. 17, the control rods may be cross-wing control rods.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
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