Control rod drive apparatus and control rod gripping structure thereof

Abstract

This invention discloses a control rod driving device and its control rod clamping structure. The control rod clamping structure includes a clamping assembly and a driving assembly. The clamping assembly includes a transmission assembly, a push rod, and a clamping member. The push rod has a first protrusion and a second protrusion. The first clamping part and the second clamping part of the clamping member form an abutment position, a clamping position, and a clamping groove. The driving assembly is connected to the push rod through the transmission assembly. When the second protrusion is in the clamping position and the first protrusion is in the abutment position, the first protrusion applies an outward force to the first clamping part and the second clamping part, causing the clamping groove to clamp the control rod, thus preventing the control rod from disengaging. When the push rod moves upward, the second protrusion applies an outward force to the first clamping part and the second clamping part, causing their lower parts to gradually open outward, and the clamping groove to gradually separate from the control rod. This structure can perform disengagement and engagement operations on the control rod, effectively reducing the risk of control rod disengagement and the risk of control rod disengagement caused by human error.

Description

Technical Field

[0001] This invention relates to the field of nuclear power technology, and in particular to a control rod driving device and its control rod clamping structure. Background Technology

[0002] The reactor core's start-up, shutdown, and power control are achieved by a control rod drive mechanism that moves control rods up and down into and out of the core. The control rod drive mechanism and the control rods are connected via a mechanical structure. During a normal reactor shutdown, the control rods gradually insert into the fuel assemblies to terminate the reaction. In an emergency shutdown, the control rod drive mechanism disengages from the control rods, and the control rods rapidly insert into the fuel assemblies under their own weight.

[0003] Currently, the most widely used method is the connection between the control rod drive mechanism and the control rod in pressurized water reactors. It uses a detachable connector to connect to the upper section of the control rod. The detachable connector consists of two elastic segments, installed at the end of the drive rod assembly of the control rod drive mechanism. Under the action of a spring, the expansion head in the drive rod assembly tightens the detachable connector, interlocking it with the control rod. Operators need to use special tools to lift the expansion head, causing the two elastic segments to contract and disengage the control rod from the detachable connector. The control rod then slides down under gravity. This method relies heavily on operator experience, is complex and cumbersome, and carries the risk of control rod disengagement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a control rod driving device and a control rod clamping structure thereof.

[0005] The technical solution adopted by the present invention to solve its technical problem is: to construct a control rod clamping structure, including a clamping component and a driving component;

[0006] The clamping assembly includes a transmission assembly, a push rod, and a clamping member. The push rod has a first protrusion and a second protrusion spaced apart from top to bottom on its outer periphery. The clamping member includes a mounting base, a first clamping part, and a second clamping part. The first clamping part and the second clamping part are disposed opposite to each other and are rotatably mounted in the mounting base. The lower part of the push rod is located in the space between the first clamping part and the second clamping part. The first clamping part and the second clamping part are formed with an abutment position, a clamping position, and a clamping groove spaced apart from top to bottom.

[0007] The drive assembly is connected to the push rod via the transmission assembly to drive the push rod to move along the height direction; when the second protrusion is in the clamping position and the first protrusion is in the abutting position, the clamping groove clamps the connecting part of the control rod; when the second protrusion is in the abutting position, the clamping groove releases the connecting part of the control rod.

[0008] In some embodiments, the transmission assembly includes a rotating sleeve, a threaded component, and a support sleeve;

[0009] The upper part of the threaded component is fixed to the inside of the rotating sleeve, and the lower part of the threaded component is located inside the support cylinder;

[0010] The push rod passes through the inner cavity of the support cylinder and the middle part of the push rod is fixed relative to the support cylinder, and the upper part of the push rod is threadedly connected to the inner cavity of the threaded component; the mounting base is connected to the lower part of the support cylinder.

[0011] The drive assembly is used to connect with the rotating sleeve to drive the rotating sleeve to rotate. The rotating sleeve drives the threaded component to rotate circumferentially. The threaded component and the push rod are threadedly driven to drive the push rod to move along the height direction.

[0012] In some embodiments, the drive assembly includes a motor, an overrunning clutch, and a reducer connected in sequence, the reducer being connected to the rotating sleeve;

[0013] The motor drives the rotating sleeve to rotate through the overrunning clutch and the reducer.

[0014] In some embodiments, the inner wall of the rotating sleeve is provided with a first protrusion, and the circumferential outer wall of the threaded component is provided with a first groove that engages with the first protrusion.

[0015] And / or, the inner wall of the rotating sleeve is provided with a second groove, and the circumferential outer wall of the threaded part is provided with a second protrusion that engages with the second groove.

[0016] In some embodiments, a plurality of bearings are provided between the lower part of the threaded member and the inner peripheral wall of the support cylinder.

[0017] In some embodiments, the inner wall of the support cylinder is provided with a third protrusion, and the outer circumferential wall of the push rod is provided with a third groove that engages with the third protrusion.

[0018] And / or, therefore, the inner wall of the support cylinder is provided with a fourth groove, and the circumferential outer wall of the push rod is provided with a fourth protrusion that engages with the fourth groove.

[0019] In some embodiments, the clamping assembly further includes a connector, the connector being hollow and cylindrical, the inner cavity of the connector having an isolation portion, the isolation portion defining an upper first connecting groove and a lower second connecting groove within the inner cavity of the connector;

[0020] The first connecting groove is fixedly connected to the lower part of the support cylinder, and the upper part of the mounting base is fixedly connected to the second connecting groove;

[0021] The push rod has a limiting part on its outer periphery, the limiting part is located below the isolation part, and a first elastic element is sleeved on the section of the push rod between the limiting part and the isolation part.

[0022] In some embodiments, the relative gap between the upper parts of the first clamping part and the second clamping part decreases and then increases from top to bottom under normal conditions, and the part with a smaller relative gap forms the abutment position, while the part with a larger relative gap forms the clamping position.

[0023] In some embodiments, both the first protrusion and the second protrusion are annular structures, and the outer diameter of the first protrusion is smaller than the outer diameter of the second protrusion.

[0024] In some embodiments, the control rod clamping structure further includes a detection component for detecting the status information of the clamping component;

[0025] The detection component includes a signal detector, a signal transmitting rod, and a signal transmitting block, wherein the signal detector is located on the outer periphery of the rotating sleeve;

[0026] The push rod has a hollow structure, the signal transmitting rod passes through the inner cavity of the push rod, and the signal transmitting block is provided at the upper end of the signal transmitting rod.

[0027] In some embodiments, the inner cavity of the push rod is provided with a receiving groove, and the circumferential outer side of the middle part of the signal rod is provided with a bearing portion;

[0028] The detection assembly further includes a second elastic element, which is sleeved on the outer periphery of the portion of the signal transmitting rod located within the receiving groove and on the upper side of the bearing portion.

[0029] The present invention also discloses a control rod driving device, including the control rod clamping structure described in any of the above embodiments, and a lifting mechanism connected to the control rod clamping structure to drive the control rod clamping structure to rise and fall.

[0030] The present invention has the following beneficial effects: the control rod clamping structure includes a clamping assembly and a driving assembly; the clamping assembly includes a transmission assembly, a push rod and a clamping member, the push rod having a first protrusion and a second protrusion; the first clamping part and the second clamping part of the clamping member are respectively formed with an abutment position, a clamping position and a clamping groove spaced apart from top to bottom; the driving assembly is connected to the push rod through the transmission assembly to drive the push rod to move along the height direction, wherein, when the second protrusion of the push rod is in the clamping position and the first protrusion is in the abutment position, the first protrusion abuts against the abutment position, and applies an outward force to the first clamping part and the second clamping part, so that the clamping groove can clamp the connection part of the control rod, thereby preventing the control rod from disengaging.

[0031] As the push rod moves upward, the first protrusion gradually moves away from the abutment position. During the upward movement of the second protrusion, the second protrusion applies an outward force to the first and second clamping parts, causing the lower parts of the first and second clamping parts to gradually spread outward. At this time, the clamping groove and the connection part of the control rod gradually separate until the connection part of the control rod disengages from the clamping groove and falls into the fuel assembly. Thus, the control rod clamping structure can perform a release and engagement operation on the control rod, and the release and engagement operation is highly safe, effectively reducing the risk of control rod release.

[0032] Compared to existing technologies that require manual operation using specialized tools to engage and disengage the control rod, this control rod clamping structure can automate the operation through the combination of clamping and driving components, effectively reducing the risk of control rod disengagement due to human error. Attached Figure Description

[0033] To more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0034] Figure 1 These are schematic diagrams of the control rod clamping structure in some embodiments of the present invention;

[0035] Figure 2 This is a schematic diagram of the control rod clamping structure clamping the control rod in some embodiments of the present invention;

[0036] Figure 3 This is a schematic diagram of the control rod clamping structure releasing the control rod in some embodiments of the present invention;

[0037] Figure 4 yes Figure 1 A cross-sectional view of the control rod clamping structure along section AA;

[0038] Figure 5 yes Figure 1 A cross-sectional view of the control rod clamping structure along the BB section;

[0039] Figure 6 This is a schematic diagram of the detection mechanism in some embodiments of the present invention. Detailed Implementation

[0040] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0041] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0042] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0043] This application discloses a control rod driving device, including a control rod clamping structure and a lifting mechanism connected to the control rod clamping structure to drive the control rod clamping structure to rise and fall. The lifting mechanism may be fixedly connected to a support cylinder 13 and / or a connecting member 17 of the control rod clamping structure. The lifting mechanism drives the control rod clamping structure to rise and fall as a whole. For example, the lifting mechanism can drive the control rod clamping structure to fall, so that the control rod clamping structure can clamp the control rod 100; or, the lifting mechanism can drive the control rod clamping structure to rise, so that the control rod clamping structure can clamp the control rod 100 and drive the control rod 100 to rise. The lifting mechanism may include, but is not limited to, a hydraulic lifting mechanism, a pneumatic lifting mechanism, or an electric lifting mechanism, etc., and is not specifically limited here.

[0044] Please see Figures 1 to 3 In some embodiments, the control rod clamping structure may include a clamping assembly 10 and a drive assembly 20.

[0045] The clamping assembly 10 may include a transmission assembly, a push rod 14, and a clamping member 15. The push rod 14 has a first protrusion 141 and a second protrusion 142 spaced from top to bottom on its outer periphery. Here, "from top to bottom" refers to... Figure 1 The height direction is shown from top to bottom.

[0046] The clamping member 15 includes a mounting base 151, a first clamping part 152 and a second clamping part 153. The first clamping part 152 and the second clamping part 153 are arranged opposite to each other and are rotatably mounted in the mounting base 151. The lower part of the push rod 14 is located in the space between the first clamping part 152 and the second clamping part 153. The first clamping part 152 and the second clamping part 153 are formed with abutment position 15a, clamping position 15b and clamping groove 15c arranged from top to bottom.

[0047] The drive assembly 20 is connected to the push rod 14 via a transmission assembly to drive the push rod 14 to move along the height direction. When the second protrusion 142 is in the clamping position 15b and the first protrusion 141 is in the abutment position 15a, the clamping groove 15c clamps the connecting portion 101 of the control rod 100 (which can be combined with...). Figure 2 (As shown). Specifically, the first protrusion 141 abuts against the abutment position 15a, which applies an outward force to the first clamping part 152 and the second clamping part 153, so that the clamping groove 15c can clamp the connecting part 101 of the control rod 100, thereby preventing the control rod 100 from disengaging.

[0048] When the second protrusion 142 is in the abutment position 15a, the clamping groove 15c releases the connecting part of the control rod. The clamping groove 15c releases the connecting part 101 of the control rod 100 (which can be engaged). Figure 3Specifically, when the push rod 14 moves upward, the first protrusion 141 gradually moves away from the abutment position 15a, while the second protrusion 142 moves upward, applying an outward force to the first clamping part 152 and the second clamping part 153, causing the lower parts of the first clamping part 152 and the second clamping part 153 to gradually open outward. At this time, the clamping groove 15c and the connecting part 101 of the control rod 100 gradually separate until the connecting part 101 of the control rod 100 disengages from the clamping groove 15c and falls into the fuel assembly. Figure 3 The “S” shown represents the travel distance of the second protrusion 142.

[0049] Understandably, the control rod clamping structure can perform a tripping and latching operation on the control rod 100, and the tripping and latching operation is highly safe, which can effectively reduce the risk of the control rod 100 tripping.

[0050] Compared to the existing technology that requires manual operation using special tools to disconnect and reconnect the control rod 100, this control rod clamping structure can automate the operation by combining the clamping component 10 and the drive component 20, effectively reducing the risk of the control rod 100 disconnecting due to human error.

[0051] Please see Figures 1 to 3 In some embodiments, the transmission assembly includes a rotating sleeve 11, a threaded component 12, and a support sleeve 13.

[0052] The rotating sleeve 11 is generally cylindrical, such as cylindrical. The upper end of the rotating sleeve 11 is a closed structure and is used to connect with the drive assembly 20. The lower end of the rotating sleeve 11 may have an opening for the installation of components such as the threaded part 12, the support cylinder 13, and the push rod 14.

[0053] The threaded component 12 may be generally cylindrical. The upper part of the threaded component 12 is relatively fixed inside the rotating sleeve 11, and the lower part of the threaded component 12 may be located inside the support cylinder 13. The push rod 14 passes through the inner cavity of the support cylinder 13, with its middle portion relatively fixed to the support cylinder 13. The upper part of the push rod 14 is threadedly connected to the inner cavity of the threaded component 12. For example, if the outer circumference of the upper part of the push rod 14 has external threads, and part or all of the inner cavity of the threaded component 12 has internal threads, the upper part of the push rod 14 and the threaded component 12 form a threaded connection, enabling threaded transmission. Understandably, the threaded component 12 and the thread at the upper end of the push rod 14 engage to form a screw-nut pair, converting the rotational motion of the threaded component 12 into the axial motion of the push rod. Preferably, the threaded component 12 may include a T-nut.

[0054] The mounting base 151 is connected to the lower part of the support cylinder 13. The first clamping part 152 and the second clamping part 153 are arranged opposite to each other and are rotatably mounted in the mounting base 151. For example, the middle or upper part of the first clamping part 152 is mounted in the mounting base 151 via the first rotating shaft 154, and the first clamping part 152 can rotate with the first rotating shaft 154 as a fulcrum. The middle or upper part of the second clamping part 153 is mounted in the mounting base 151 via the second rotating shaft 155, and the second clamping part 153 can rotate with the second rotating shaft 155 as a fulcrum.

[0055] The drive assembly 20 is connected to the rotating sleeve 11 to drive the rotating sleeve 11 to rotate. The rotating sleeve 11 drives the threaded member 12 to rotate circumferentially. The threaded member 12 is threadedly driven to the push rod 14 to move the push rod 14 in the height direction. When the second protrusion 142 is located at the clamping position 15b and the first protrusion 141 is located at the abutment position 15a, the clamping groove 15c clamps the connecting part 101 of the control rod 100 (which can be combined with...). Figure 2 As shown), specifically, the first protrusion 141 abuts against the abutment position 15a, which applies an outward force to the first clamping part 152 and the second clamping part 153, so that the clamping groove 15c can clamp the connecting part 101 of the control rod 100, thereby preventing the control rod 100 from disengaging.

[0056] When the second protrusion 142 is in the abutment position 15a, the clamping groove 15c releases the connecting part 101 of the control rod 100 (which can be engaged). Figure 3 Specifically, when the push rod 14 moves upward, the first protrusion 141 gradually moves away from the abutment position 15a, while the second protrusion 142 moves upward, applying an outward force to the first clamping part 152 and the second clamping part 153, causing the lower parts of the first clamping part 152 and the second clamping part 153 to gradually open outward. At this time, the clamping groove 15c and the connecting part 101 of the control rod 100 gradually separate until the connecting part 101 of the control rod 100 disengages from the clamping groove 15c and falls into the fuel assembly. Figure 3 The “S” shown represents the travel distance of the second protrusion 142.

[0057] When the clamping component 10 of the control rod clamping structure is connected to the control rod 100, it is more stable and can reduce the risk of the control rod 100 accidentally disengaging.

[0058] The clamping component 10 of this application is further described below, in conjunction with Figure 1 and Figure 4 For details, please refer to Figure 4In some embodiments, the inner wall of the rotating sleeve 11 is provided with a first protrusion 111, and the outer circumferential wall of the threaded component 12 is provided with a first groove 121 that engages with the first protrusion 111. And / or, the inner wall of the rotating sleeve 11 is provided with a second groove, and the outer circumferential wall of the threaded component 12 is provided with a second protrusion that engages with the second groove. The two can cooperate to achieve a circumferential positioning connection between the rotating sleeve 11 and the threaded component 12 and transmit torque.

[0059] The first protrusion 111 can be one, two, or more. When two first protrusions 111 are provided, they can be symmetrically arranged along the axis of the rotating sleeve 11. When three first protrusions 111 are provided, they can be evenly spaced along the axis of the rotating sleeve 11, resulting in more uniform torque transmission. Furthermore, the cross-section of the first protrusion 111 can be rectangular, and the cross-section of the first groove 121 can also be rectangular. Furthermore, the position and number of the first grooves 121 correspond to the position and number of the first protrusions 111. The position and number of the second grooves and second protrusions are similar to those of the first protrusions 111, etc.

[0060] Combination Figure 1 and Figure 5 For details, please refer to Figure 5 In some embodiments, the support cylinder 13 is a fixed, non-rotating structure. The inner wall of the support cylinder 13 has a third protrusion 131 facing inwards, and the outer circumferential wall of the push rod 14 has a third groove 143 that engages with the third protrusion 131. For example, the inner wall of the middle portion of the support cylinder 13 has a third protrusion 131 facing inwards, and the outer circumferential wall of the middle portion of the push rod 14 has a third groove 143 that engages with the third protrusion 131. Alternatively, the inner wall of the support cylinder 13 has a fourth groove facing inwards, and the outer circumferential wall of the push rod 14 has a fourth protrusion that engages with the fourth groove. The combination of these two elements allows for a circumferentially positioned connection between the support cylinder 13 and the push rod 14, enabling torque transmission.

[0061] The third protrusion 131 can be one, two, or more. When two third protrusions 131 are provided, they can be symmetrically arranged along the axis of the support cylinder 13. When three third protrusions 131 are provided, they can be evenly spaced along the axis of the support cylinder 13. Furthermore, the cross-section of the third protrusion 131 can be rectangular, and the cross-section of the third groove 143 can also be rectangular. Furthermore, the position and number of the third grooves 143 correspond to the position and number of the third protrusions 131. The position and number of the fourth groove and the fourth protrusion are similar to those of the third protrusions 131, etc.

[0062] like Figure 1 As shown, in some embodiments, a plurality of bearings 16 are provided between the lower outer peripheral wall of the threaded component 12 and the inner peripheral wall of the support cylinder 13, serving to center and provide stable support. The bearings 16 may be ball linear bearings. Here, "a plurality of bearings 16" refers to at least one bearing 16; for example, the bearing 16 can be one, two, or any other arbitrary number. When there are two or more bearings 16, the two or more bearings 16 can be spaced apart along the height direction of the threaded component 12.

[0063] Alternatively, in some embodiments, a plurality of guide rails, optionally ball linear guide rails, are provided between the lower part of the threaded component 12 and the inner peripheral wall of the support cylinder 13. These guide rails serve to center and provide stable support. Here, "a plurality of guide rails" refers to at least one guide rail; for example, the guide rail can be one, two, or any other arbitrary number. When there are two or more guide rails, they can be spaced apart along the height direction of the threaded component 12.

[0064] Understandably, when the threaded part 12 drives the push rod 14 to move up and down, the threaded part 12 mates with the inner wall of the support cylinder 13 in the axial direction, and a bearing 16 (such as a ball linear bearing) / guide rail (such as a ball linear guide) is installed. The bearing 16 (such as a ball linear bearing) / guide rail (such as a ball linear guide) guides and supports the movement, which greatly reduces the motion resistance and achieves high-precision guiding function.

[0065] like Figure 1 As shown, in some embodiments, the clamping assembly 10 further includes a connector 17, which is a fixed, non-rotating structure. The connector 17 is a hollow column, and its inner cavity has an isolation portion 171 that defines an upper first connecting groove 172 and a lower second connecting groove 173 within the inner cavity of the connector 17. The first connecting groove 172 is fixedly connected to the lower part of the support cylinder 13, and the upper part of the mounting base 151 is fixedly connected to the second connecting groove 173. The push rod 14 has a limiting portion 144 on its outer periphery, located below the isolation portion 171. A first elastic element 18 is sleeved on the section of the push rod 14 between the limiting portion 144 and the isolation portion 171. The first elastic element 18 can be a helical columnar spring. This first elastic element 18 makes it easier for the push rod 14 to descend and reset.

[0066] Combination Figures 1 to 3In some embodiments, the relative gap between the upper parts of the first clamping portion 152 and the second clamping portion 153 decreases and then increases from top to bottom under normal conditions, with the smaller relative gap forming an abutment position 15a and the larger relative gap forming a clamping position 15b. Here, "normal condition" can refer to the state when the first clamping portion 152 and the second clamping portion 153 are relatively vertical (e.g., ...). Figure 2 (As shown).

[0067] Furthermore, the surface of the upper part of the first clamping part 152 facing the second clamping part 153 can be a convex curved surface. Similarly, the surface of the upper part of the second clamping part 153 facing the first clamping part 152 can be a convex curved surface. This allows the relative gap between the upper parts of the first clamping part 152 and the second clamping part 153 to decrease and then increase from top to bottom under normal conditions. This allows the first protrusion 141 and / or the second protrusion 142 to apply a certain force to the first clamping part 152 and the second clamping part 153 during the up-and-down movement, causing the first clamping part 152 and the second clamping part 153 to move or remain in a certain state.

[0068] Both the first protrusion 141 and the second protrusion 142 can be in the form of annular semi-circular structures. The outer diameter of the first protrusion 141 is smaller than the outer diameter of the second protrusion 142, so that when the second protrusion 142 moves upward, it can better open the first clamping part 152 and the second clamping part 153, while the first protrusion 141 gradually stops applying force to the first clamping part 152 and the second clamping part 153, or the applied force becomes smaller.

[0069] Combination Figures 1 to 3 In some embodiments, the surface of the first clamping part 152 facing the second clamping part 153 is provided with a first recess, the opening of the first recess is provided facing the second clamping part 153, and the longitudinal cross-sectional shape of the first recess may be approximately arched.

[0070] In contrast, the second clamping part 153 has a second recess on its surface facing the first clamping part 152, the opening of the second recess is facing the first clamping part 152, and the longitudinal cross-sectional shape of the second recess can be approximately arched.

[0071] The first recess and the second recess can be combined to form a clamping groove 15c for clamping the connecting part 101 of the control rod 100. The shape and size of the clamping groove 15c are adapted to the shape and size of the connecting part 101 of the control rod 100.

[0072] The following describes the drive assembly 20 of this application. In some embodiments, the drive assembly 20 may include a motor 21, an overrunning clutch 22, and a reducer 23 connected in sequence. The reducer 23 is connected to a transmission assembly, and further, the reducer 23 is connected to a rotating sleeve 11. The motor 21 drives the transmission assembly to rotate through the overrunning clutch 22 and the reducer 23. Further, the motor 21 drives the rotating sleeve 11 to rotate through the overrunning clutch 22 and the reducer 23.

[0073] The motor 21 provides driving torque for the entire control rod clamping structure. By receiving control commands, it can achieve adjustable speed, forward rotation, reverse rotation, and stop locking at any position. The motor 21 can be remotely or over long distances connected to the control system or control equipment via wired or wireless means for the transmission of signals and / or commands.

[0074] The rotation of the motor 21 transmits torque to the overrunning clutch 22, which in turn transmits torque to the reducer 23. The downstream reducer 23 then reduces the output speed and increases the output torque. The motor 21 may be, but is not limited to, a servo motor, and the reducer 23 may be, but is not limited to, a planetary reducer.

[0075] Understandably, the drive assembly 20, employing a combination of motor 21, overrunning clutch 22, and reducer 23, achieves a large reduction ratio and high torque output, significantly reducing the torque requirements of motor 21 and enabling miniaturization of motor 21. Simultaneously, the presence of overrunning clutch 22 allows for bidirectional power transmission during forward power transmission in the control rod clamping structure. Furthermore, when push rod 14 is subjected to impact or vibration, overrunning clutch 22 will not reverse, thus locking push rod 14 and preventing axial movement. This maintains the contact with clamping member 15, ensuring a stable clamping of control rod 100 and reducing the risk of accidental disengagement of control rod 100 from clamping member 15.

[0076] Combination Figure 1 and Figure 6 As shown, in some embodiments, the control rod clamping structure further includes a detection component 30 for detecting the status information of the clamping component 10. The detection component 30 includes a signal detector 31, a signal transmitting rod 32, and a signal transmitting block 33, with the signal detector 31 located on the outer periphery of the rotating sleeve 11.

[0077] The push rod 14 has a hollow structure, and the signal transmitting rod 32 passes through the inner cavity of the push rod 14. The upper end of the signal transmitting rod 32 is provided with a signal transmitting block 33.

[0078] Furthermore, the inner cavity of the push rod 14 is provided with a receiving groove, and the circumferential outer side of the middle part of the signal rod 32 is provided with a bearing portion 321; the detection assembly 30 also includes a second elastic member 34, which is sleeved on the outer periphery of the portion of the signal rod 32 located in the receiving groove and above the bearing portion 321. The second elastic member 34 may be a helical columnar spring, which allows the signal rod 32 to return downward and can better press the signal rod 32 against the upper part of the connection portion 101 of the control rod 100.

[0079] In some embodiments, the signal detector 31 may be connected to a control system or control device for transmitting signals and / or instructions. The signal detector 31 may be, but is not limited to, an electromagnetic coil detector. When the signal transmitting block 33 moves within the detection space of the signal detector 31, it can cause a change in the magnetic field, thereby obtaining the position information of the signal transmitting block 33.

[0080] The signaling rod 32 may be, but is not limited to, a metal rod, such as a stainless steel rod, an aluminum rod, or other metal rods.

[0081] The signal transmitting block 33 can be fixedly connected to the upper end of the signal transmitting rod 32 or detachably connected. The signal transmitting block 33 can be a metal block, such as a stainless steel block, an aluminum block or other metal block.

[0082] Understandably, the detection component 30 can detect whether the clamping component 10 has successfully gripped the control rod 100 and provide signal feedback. When the control rod 100 is gripped, the lower end of the signal rod 32 first contacts the control rod 100 and then compresses the second elastic member 34. The signal rod 32 can then rise inside the hollow push rod 14, thereby pushing the signal block 33 to move upward. The signal detector 31 can detect the rise of the signal rod 32 and thus determine that the control rod 100 is connected. When the control rod 100 is released, the control rod 100 leaves the clamping component 15, and the signal rod 32 moves downward under the drive of the second elastic member 34, thereby driving the signal block 33 to move downward. The signal detector 31 can detect the descent of the signal rod 32 and thus determine that the control rod 100 is disengaged.

[0083] The control rod clamping structure has the following technical advantages:

[0084] (1) By using a combination of clamping component 10 and driving component 20, the rotational motion of driving component 20 is finally converted into the axial up-and-down motion of push rod 14, thus optimizing the spatial structure requirements.

[0085] (2) The drive assembly 20 adopts a combination of motor 21, overrunning clutch 22 and reducer 23 to achieve a large reduction ratio and high torque output, which greatly reduces the torque requirement of motor 21 and realizes the miniaturization of motor 21. At the same time, with the presence of overrunning clutch 22, push rod 14 can be locked and cannot move up and down in the axial direction, thereby ensuring that clamping member 15 firmly clamps control rod 100 and reducing the risk of control rod 100 accidentally disengaging from clamping member 15.

[0086] (3) The detection component 30 can monitor the connection or disconnection of the control rod 100.

[0087] (4) Compared with the existing technology, which requires manual use of special tools to disconnect and reconnect the control rod 100, the operation of this control rod clamping structure is simpler and more precise, and can effectively reduce the risk of control rod disconnection.

[0088] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A control rod clamping structure, characterized in that, Includes a clamping assembly (10) and a driving assembly (20); The clamping assembly (10) includes a transmission assembly, a push rod (14), and a clamping member (15). The push rod (14) has a first protrusion (141) and a second protrusion (142) spaced apart from top to bottom on its outer periphery. The clamping member (15) includes a mounting base (151), a first clamping part (152), and a second clamping part (153). The first clamping part (152) and the second clamping part (153) are arranged opposite to each other and are rotatably mounted in the mounting base (151). The lower part of the push rod (14) is located in the space between the first clamping part (152) and the second clamping part (153). The first clamping part (152) and the second clamping part (153) are formed opposite to each other with abutment position (15a), clamping position (15b), and clamping groove (15c) spaced apart from top to bottom. The drive assembly (20) is connected to the push rod (14) through the transmission assembly to drive the push rod (14) to move along the height direction; when the second protrusion (142) is located at the clamping position (15b) and the first protrusion (141) is located at the abutting position (15a), the clamping groove (15c) clamps the connecting part of the control rod; when the second protrusion (142) is located at the abutting position (15a), the clamping groove (15c) releases the connecting part of the control rod.

2. The control rod clamping structure according to claim 1, characterized in that, The transmission assembly includes a rotating sleeve (11), a threaded component (12), and a support sleeve (13); The upper part of the threaded component (12) is fixed to the inside of the rotating sleeve (11), and the lower part of the threaded component (12) is located inside the support cylinder (13); The push rod (14) passes through the inner cavity of the support cylinder (13) and the middle part of the push rod (14) is fixed relative to the support cylinder (13), and the upper part of the push rod (14) is threadedly connected to the inner cavity of the threaded part (12); the mounting base (151) is connected to the lower part of the support cylinder (13); The drive assembly (20) is connected to the rotating sleeve (11) to drive the rotating sleeve (11) to rotate. The rotating sleeve (11) drives the threaded part (12) to rotate circumferentially. The threaded part (12) and the push rod (14) are threadedly driven to drive the push rod (14) to move along the height direction.

3. The control rod clamping structure according to claim 2, characterized in that, The drive assembly (20) includes a motor (21), an overrunning clutch (22) and a reducer (23) connected in sequence, and the reducer (23) is connected to the rotating sleeve (11); The motor (21) drives the rotating sleeve (11) to rotate through the overrunning clutch (22) and the reducer (23).

4. The control rod clamping structure according to claim 2, characterized in that, The inner wall of the rotating sleeve (11) is provided with a first protrusion (111), and the outer circumferential wall of the threaded part (12) is provided with a first groove (121) that engages with the first protrusion (111). And / or, the inner wall of the rotating sleeve (11) is provided with a second groove, and the outer circumferential wall of the threaded part (12) is provided with a second protrusion that engages with the second groove.

5. The control rod clamping structure according to claim 2, characterized in that, A plurality of bearings (16) are provided between the lower part of the threaded part (12) and the inner peripheral wall of the support cylinder (13).

6. The control rod clamping structure according to claim 2, characterized in that, The inner wall of the support cylinder (13) is provided with a third protrusion (131) inward, and the outer circumferential wall of the push rod (14) is provided with a third groove (143) that engages with the third protrusion (131). And / or, the inner wall of the support cylinder (13) is provided with a fourth groove, and the outer circumferential wall of the push rod (14) is provided with a fourth protrusion that engages with the fourth groove.

7. The control rod clamping structure according to claim 2, characterized in that, The clamping assembly (10) further includes a connector (17), which is a hollow column. The inner cavity of the connector (17) is provided with an isolation part (171), which defines the inner cavity of the connector (17) into an upper first connecting groove (172) and a lower second connecting groove (173). The first connecting groove (172) is fixedly connected to the lower part of the support cylinder (13), and the upper part of the mounting base (151) is fixedly connected to the second connecting groove (173); The push rod (14) has a limiting part (144) on its outer periphery. The limiting part (144) is located below the isolation part (171), and a first elastic member (18) is sleeved on the section of the push rod (14) between the limiting part (144) and the isolation part (171).

8. The control rod clamping structure according to claim 1, characterized in that, In normal conditions, the relative gap between the upper parts of the first clamping part (152) and the second clamping part (153) decreases from top to bottom and then increases. The part with the smaller relative gap forms the abutment position (15a), and the part with the larger relative gap forms the clamping position (15b).

9. The control rod clamping structure according to claim 1, characterized in that, Both the first protrusion (141) and the second protrusion (142) are annular structures, and the outer diameter of the first protrusion (141) is smaller than the outer diameter of the second protrusion (142).

10. The control rod clamping structure according to claim 2, characterized in that, The control rod clamping structure also includes a detection component (30) for detecting the status information of the clamping component (10); The detection component (30) includes a signal detector (31), a signal transmitting rod (32) and a signal transmitting block (33), wherein the signal detector (31) is disposed on the outer periphery of the rotating sleeve (11); The push rod (14) has a hollow structure, the signal transmitting rod (32) passes through the inner cavity of the push rod (14), and the upper end of the signal transmitting rod (32) is provided with the signal transmitting block (33).

11. The control rod clamping structure according to claim 10, characterized in that, The inner cavity of the push rod (14) is provided with a receiving groove, and the outer circumferential side of the middle part of the signal rod (32) is provided with a bearing part (321); The detection component (30) further includes a second elastic element (34), which is sleeved on the outer periphery of the portion of the signal rod (32) located in the receiving groove and on the upper side of the bearing portion (321).

12. A control rod driving device, characterized in that, It includes the control rod clamping structure according to any one of claims 1 to 11, and a lifting mechanism connected to the control rod clamping structure to drive the control rod clamping structure to rise and fall.

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