Sectional control rod with locking function

Abstract

The invention provides a sectional type control rod with a locking function, which comprises a driving mechanism connecting piece, a following body, an absorber and a locking part, the locking part comprises a first locking unit and a second locking unit, the first locking unit is arranged in the driving mechanism connecting piece and the following body to lock the driving mechanism connecting piece and the following body, and the second locking unit is arranged in the following body to lock the driving mechanism connecting piece and the following body. The second locking unit is arranged in the following body and the absorbing body to lock the following body and the absorbing body, the second locking unit is connected with the first locking unit to limit the first locking unit, detachable connection can be achieved, and segmented disassembly and assembly of the driving mechanism connecting piece, the following body and the absorbing body can be achieved in the height direction. The requirement for the height of an operation space is reduced, when one section is structurally damaged or fails in function, the control rod does not need to be integrally replaced, only the damaged functional section needs to be independently disassembled and replaced, and cost is reduced.

Description

Technical Field

[0001] This application belongs to the field of nuclear reactor core technology, specifically relating to a segmented control rod with locking function. Background Technology

[0002] The reactor core mainly consists of fuel assemblies, control rod assemblies, stationary related assemblies, and structural and experimental components placed inside the reactor. The main function of the control rod assembly is to act as a neutron absorber, moving within the reactor core via a drive system to control reactivity, enabling reactor startup, normal shutdown, regulation and maintenance of reactor power, and ensuring reactor safety under accident conditions.

[0003] When control rod assemblies are used within the stack, their large overall height necessitates significant operational space, making operation inconvenient. Furthermore, if any part of the control rod is damaged or fails, the entire control rod must be replaced due to its integral structure, resulting in high replacement costs. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this application is to provide a segmented control rod with a locking function, which allows for easy operation of the control rod in the height direction, and when part of the control rod is damaged or fails, only the damaged part is replaced, thus saving costs.

[0005] To address the aforementioned problems, this application provides a segmented control rod with a locking function, comprising a drive mechanism connector, a follower, an absorber, and a locking part. The locking part includes a first locking unit and a second locking unit. The first locking unit is disposed within the drive mechanism connector and the follower to lock the drive mechanism connector and the follower. The second locking unit is disposed within the follower and the absorber to lock the follower and the absorber. The second locking unit is connected to the first locking unit to limit the first locking unit.

[0006] Optionally, the first locking unit is disposed along the axial direction of the control rod in the drive mechanism connector and the follower body, and the second locking unit is disposed along the axial direction of the control rod in the absorber and the locking part. The second locking unit abuts against the first locking unit along the axial direction of the control rod to limit the first locking unit in the drive mechanism connector and the follower body in the axial direction of the control rod.

[0007] Optionally, the first locking unit includes a first spindle and a plurality of first claws. The plurality of first claws are arranged circumferentially along the control rod. The hinged ends of the first claws are hinged to the follower body. The hook ends of the first claws extend into the drive mechanism connector. The end of the first spindle is provided with a first opening and closing control body. The first opening and closing control body is inserted between the plurality of first claws to drive the hook ends of the plurality of first claws to move radially outward along the control rod to engage with a first inner cavity protrusion on the inner wall of the drive mechanism connector.

[0008] Optionally, a plurality of ribs are provided on the outer peripheral wall of the first mandrel. The ribs extend along the axial direction of the first mandrel. The plurality of ribs are divided into multiple groups. The ribs in each group are arranged along the axial direction of the first mandrel. The plurality of ribs in each group are evenly arranged along the circumference of the first mandrel. The end of the rib away from the first mandrel is an arc surface. The first mandrel includes a first upper section and a first lower section, the first upper section and the first lower section are detachably connected, the top of the first upper section is provided with a first lifting member, the first opening and closing control body is provided at the bottom of the first lower section, and the outer peripheral wall of the first lower section is provided with a first abutting boss, the first abutting boss is used to abut against the top of the first hook to form a limit.

[0009] Optionally, the second locking unit includes a second spindle and a plurality of second hooks. The plurality of second hooks are arranged circumferentially along the control rod. The hinged ends of the second hooks are hinged to the absorber body. The hook tips of the second hooks extend into the follower body. The end of the second spindle is provided with a second opening and closing control body. The second opening and closing control body is inserted between the plurality of second hooks to drive the hook tips of the plurality of second hooks to move radially outward along the control rod to engage with a second inner cavity protrusion on the inner wall of the follower body.

[0010] Optionally, the second mandrel includes a second upper section and a second lower section, the second upper section and the second lower section are detachably connected, the top of the second upper section is provided with a second lifting member, the second opening and closing control body is provided at the bottom of the second lower section, and the outer peripheral wall of the second lower section is provided with a second abutting boss, the second abutting boss is used to abut against the top of the second hook to form a limit; The bottom of the second opening and closing control body is provided with an abutment post, which abuts against the top of the first mandrel to form a limit.

[0011] Optionally, the hinge end of the first hook is hinged to the follower body via a pivot, and the hook end of the first hook extends radially outward along the drive mechanism connector to engage with a first inner cavity protrusion extending radially inward along the drive mechanism connector. The hinged end of the second hook is hinged to the absorbent body via a pivot, and the hook end of the second hook extends radially outward along the follower body to engage with the second inner cavity protrusion extending radially inward along the follower body.

[0012] Optionally, the absorber includes a lower connector, the lower connector having a radial hole, a guide block having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a guide hole having a second lower section having a guide hole ...

[0013] Optionally, the absorber includes an upper connector, and the locking part includes a third locking unit. The third locking unit is disposed on the upper connector, and an annular groove is provided along the circumferential direction on the second upper section. The third locking unit engages with the annular groove to limit the second mandrel.

[0014] Optionally, the third locking unit includes an elastic element and a ball bearing. A radial mounting groove is provided along the upper edge of the upper connector. One end of the elastic element is fixed in the radial mounting groove, and the other end is connected to the ball bearing. The ball bearing is located on the side of the elastic element close to the second spindle. The elastic element applies an elastic force to the ball bearing to push the ball bearing into the annular groove.

[0015] Beneficial effects: The present invention provides a segmented control rod with locking function. By setting a first locking unit and a second locking unit, the drive mechanism connector, follower, and absorber can be detachably connected, allowing for segmented disassembly and assembly of the drive mechanism connector, follower, and absorber in the height direction. When operating inside the nuclear reactor core, there is no need to reserve excessive height space for the control rod as a whole, significantly reducing the requirements for operating space height. This is particularly suitable for scenarios with limited space within the reactor core, making on-site installation, commissioning, and routine maintenance easier to implement, improving operational flexibility and efficiency. Since the drive mechanism connector, follower, and absorber are segmented and connected through locking parts, when one segment suffers structural damage or functional failure, it is not necessary to replace the entire control rod; only the damaged functional segment needs to be disassembled and replaced individually. This significantly reduces the number of scrapped parts, lowers the material cost of control rod maintenance, shortens maintenance time, and reduces losses caused by reactor downtime for maintenance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a segmented control rod with locking function according to an embodiment of this application; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of point B in the middle; Figure 4 This is a schematic diagram of the structure of the first mandrel according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the second mandrel according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the first hook in an embodiment of this application; Figure 7 This is a schematic diagram of the structure of the second hook in an embodiment of this application; Figure 8 This is a first structural schematic diagram of the guide block according to an embodiment of this application; Figure 9 This is a schematic diagram of the second structure of the guide block according to an embodiment of this application; Figure 10 This is a schematic diagram of the structure of the radial hole of the lower connector in an embodiment of this application; Figure 11 This is a schematic diagram of the structure of the second inner cavity protrusion of the follower body according to an embodiment of this application.

[0017] The reference numerals in the attached figures are as follows: 1. Drive mechanism connector; 11. First inner cavity protrusion; 2. Follower body; 21. Second inner cavity protrusion; 3. Absorber body; 31. Lower connector; 311. Radial hole; 32. Upper connector; 41. First spindle; 411. First opening and closing control body; 412. Rib; 413. First upper section; 414. First lower section; 415. First lifting component; 416. First abutment boss; 42. First claw; 43. Second spindle; 431. Second opening and closing control body; 432. Second upper section; 433. Second lower section; 434. Second lifting component; 435. Second abutment boss; 436. Abutment post; 437. Annular groove; 44. Second claw; 5. Guide block; 51. Guide hole; 61. Elastic element; 62. Ball bearing. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] See also Figures 1 to 11 As shown, according to an embodiment of this application, a segmented control rod with locking function is provided, including a drive mechanism connector 1, a follower body 2, an absorber body 3, and a locking part. The locking part includes a first locking unit and a second locking unit. The first locking unit is disposed in the drive mechanism connector 1 and the follower body 2 to lock the drive mechanism connector 1 and the follower body 2. The second locking unit is disposed in the follower body 2 and the absorber body 3 to lock the follower body 2 and the absorber body 3. The second locking unit is connected to the first locking unit to limit the first locking unit.

[0023] By setting up a first locking unit and a second locking unit, the drive mechanism connector 1, follower 2, and absorber 3 can be detachably connected, allowing for segmented disassembly and assembly of these components along the height direction. When operating inside the nuclear reactor core, there is no need to reserve excessive height space for the control rod as a whole, significantly reducing the requirements for operating space height. This is particularly suitable for scenarios with limited space within the reactor core, making on-site installation, commissioning, and routine maintenance easier and improving operational flexibility and efficiency. Since the drive mechanism connector 1, follower 2, and absorber 3 are segmented and connected through locking mechanisms, when one segment suffers structural damage or functional failure, it is not necessary to replace the entire control rod; only the damaged functional segment needs to be disassembled and replaced individually. This significantly reduces the number of scrapped parts, lowers the material costs of control rod maintenance, shortens maintenance time, and reduces losses caused by reactor downtime for maintenance.

[0024] The control rod is roughly cylindrical in shape. When the control rod is placed vertically, the drive mechanism connector 1, the follower 2, and the absorber 3 are arranged sequentially from bottom to top.

[0025] The drive mechanism connector 1, follower 2, and absorber 3 are generally hollow structures. A first locking unit and a second locking unit are vertically arranged within these components. The second locking unit is located above the first locking unit. The drive mechanism connector 1, follower 2, absorber 3, first locking unit, and second locking unit are generally coaxially arranged.

[0026] Specifically, the first locking unit is set in the drive mechanism connector 1 and the follower 2, thereby locking the drive mechanism connector 1 and the follower 2 or unlocking the drive mechanism connector 1 and the follower 2.

[0027] The second locking unit is connected to the first locking unit to limit the first locking unit within the drive mechanism connector 1 and the follower 2, thereby fixing the position of the first locking unit within the drive mechanism connector 1 and the follower 2, thus maintaining the drive mechanism connector 1 and the follower 2 in a locked state. At the same time, the second locking unit is located within the follower 2 and the absorber 3, and locks the follower 2 and the absorber 3, thereby achieving a fixed connection between the drive mechanism connector 1, the follower 2 and the absorber 3.

[0028] In this process, after the second locking unit disengages from the follower 2 and the absorber 3, the follower 2 and the absorber 3 are unlocked. At this time, the second locking unit is also disengaged from the first locking unit. The first locking unit can also disengage from the drive mechanism connector 1 and the follower 2, and the drive mechanism connector 1 and the follower 2 are unlocked.

[0029] The second locking unit can abut against the first locking unit or be plugged into it.

[0030] Specifically, the first locking unit is disposed in the drive mechanism connector 1 and the follower body 2 along the axial direction of the control rod, and the second locking unit is disposed in the absorber body 3 and the locking part along the axial direction of the control rod. The second locking unit abuts against the first locking unit along the axial direction of the control rod to limit the first locking unit in the drive mechanism connector 1 and the follower body 2 in the axial direction of the control rod.

[0031] By arranging the first locking unit and the second locking unit along the axial direction of the control rod and abutting each other along the axial direction to form an axial limiting structure, the axial movement of the first locking unit during the operation of the control rod can be effectively prevented. This ensures that the first locking unit is always stably limited within the drive mechanism connector 1 and the follower body 2, thereby ensuring the connection reliability of the drive mechanism connector 1 and the follower body 2. At the same time, the second locking unit itself can also stably act on the locking of the absorber body 3 and the locking part, thereby improving the overall stability of the connection of each functional segment of the control rod and preventing the segment connection from failing due to the displacement of the locking unit.

[0032] When the first locking unit is inserted into and locks the drive mechanism connector 1 and the follower body 2, the first locking unit has moved downward to the limit position. At this time, the second locking unit abuts against the first locking unit from the bottom up, thereby limiting the first locking unit in the drive mechanism connector 1 and the follower body 2 in the axial direction of the control rod.

[0033] The first locking unit includes a first spindle 41 and a plurality of first claws 42. The plurality of first claws 42 are arranged circumferentially along the control rod. The hinged ends of the first claws 42 are hinged in the follower body 2. The hook ends of the first claws 42 extend into the drive mechanism connector 1. The end of the first spindle 41 is provided with a first opening and closing control body 411. The first opening and closing control body 411 is inserted between the plurality of first claws 42 to drive the hook ends of the plurality of first claws 42 to move radially outward along the control rod to engage with the first inner cavity protrusion 11 on the inner wall of the drive mechanism connector 1. By arranging multiple first hooks 42 along the circumference of the control rod, the locking force can be evenly transmitted in the circumferential direction of the control rod, avoiding locking failure caused by localized force concentration. At the same time, the first hooks 42 are stably hinged to the follower body 2 through the hinge end, and the hook end extends into the drive mechanism connector 1. With the cooperation of the first opening and closing control body 411 at the end of the first spindle 41, the hook end moves radially and finally engages with the first inner cavity protrusion 11 on the inner wall of the drive mechanism connector 1, forming a multi-point, circumferentially symmetrical locking structure. This greatly improves the stability of the connection between the drive mechanism connector 1 and the follower body 2. Even under complex conditions such as fluid impact and vibration in the nuclear reactor core, it can effectively prevent the two from separating relative to each other and ensure the overall structural stability of the control rod.

[0034] The hinge end of the first hook 42 is hinged to the follower body 2 via a pivot, allowing the hook to rotate around the hinge point. Simultaneously, the hook tip of the first hook 42 extends into the internal space of the drive mechanism connector 1 and is radially opposite to the first inner cavity protrusion 11. The first opening / closing control body 411 moves downward with the first spindle 41 and inserts between multiple first hooks 42 arranged circumferentially along the control rod. During movement, it generates a radially outward thrust on the inner side of the first hook 42, forcing the multiple first hooks 42 to swing radially outward around their respective hinge ends. This causes the hook tips to unfold radially outward along the control rod. The outwardly unfolded hook tips of the first hooks 42 engage with the first inner cavity protrusion 11 on the inner wall of the drive mechanism connector 1, forming an abutment in the opposite direction of the insertion direction of the first spindle 41. This stably connects the drive mechanism connector 1 and the follower body 2, achieving reliable locking between them. Conversely, when the first opening and closing control body 411 moves in the opposite direction with the first spindle 41, the supporting force of the first opening and closing control body 411 on the first hook 42 disappears, the hook end of the first hook 42 can be retracted, and the engagement with the first inner cavity protrusion 11 is released, thereby realizing the unlocking of the drive mechanism connector 1 and the follower body 2.

[0035] The first opening and closing control body 411 is roughly spherical in shape, and the diameter of the first opening and closing control body 411 is larger than the portion of the first spindle 41 connected to it.

[0036] The first hook 42 is roughly Z-shaped, and the first inner cavity protrusion 11 is roughly a boss structure extending radially inward along the drive mechanism connector 1. The first hook 42 hooks onto the bottom surface of the first inner cavity protrusion 11. The second spindle 43 moves downward to its limit position, and then, through the hook of the first hook 42 and the first inner cavity protrusion 11, a locking connection can be achieved between the drive mechanism connector 1 and the follower 2.

[0037] The number of first hooks 42 is four, and the four first hooks 42 are evenly arranged along the circumference of the control rod.

[0038] Multiple ribs 412 are provided on the outer peripheral wall of the first mandrel 41. The ribs 412 extend along the axial direction of the first mandrel 41. The multiple ribs 412 are divided into multiple groups. Each group of ribs 412 is arranged along the axial direction of the first mandrel 41. The multiple ribs 412 in each group are evenly arranged along the circumference of the first mandrel 41. The end of the rib 412 away from the first mandrel 41 is an arc surface.

[0039] By providing ribs 412 on the outer peripheral wall of the first mandrel 41, a stable and uniform flow channel gap can be formed between the first mandrel 41 and the passing component.

[0040] Among them, a group of ribs 412 are arranged circumferentially along the first spindle 41, and multiple groups of the above-mentioned ribs 412 are arranged axially along the first spindle 41.

[0041] Specifically, the outer peripheral wall of the first mandrel 41 has three sets of ribs 412 arranged along the axial direction, and each set of ribs 412 includes three ribs that are 120° apart.

[0042] Among them, the top surface of rib 412 is an arc surface.

[0043] The first spindle 41 includes a first upper section 413 and a first lower section 414. The first upper section 413 and the first lower section 414 are detachably connected. The top of the first upper section 413 is provided with a first lifting member 415. The first opening and closing control body 411 is provided at the bottom of the first lower section 414. The outer peripheral wall of the first lower section 414 is provided with a first abutting boss 416. The first abutting boss 416 is used to abut against the top of the first hook 42 to form a limit.

[0044] By setting the first upper section 413 and the first lower section 414 and making them detachably connected, if only one section of the first spindle 41 has a problem during the inspection or maintenance of the control rod, it is not necessary to replace the entire first spindle 41. Only the damaged section needs to be disassembled and replaced, which reduces spare parts costs and maintenance workload. At the same time, it is also convenient to inspect, repair or replace each section of the first spindle 41 individually, improving the flexibility and efficiency of maintenance operations.

[0045] The upper section 413 and the lower section 414 are connected by threads and then fixed with pins.

[0046] When needed, the first lower section 414 can provide a support point for the hoisting of the follower body 2 after the first hook 42 closes.

[0047] A first abutment boss 416 is provided on the outer peripheral wall of the first lower section 414, which can abut against the top of the first claw 42 to form an effective limiting position. During the process of the first spindle 41 driving the first opening and closing control body 411 to control the opening and closing of the first claw 42, the first abutment boss 416 can limit the axial movement range of the first spindle 41. Through the limiting effect of the first abutment boss 416, it can be ensured that the first opening and closing control body 411 pushes the first claw 42 to a suitable position, ensuring that the first claw 42 can stably realize the opening and closing action, thereby ensuring the reliability of the locking state of the drive mechanism connector 1 and the follower 2.

[0048] The first abutting boss 416 abuts against the top of the first hook 42, thereby forming a limit in the insertion direction of the first spindle 41, that is, forming a limit in the downward direction, preventing the first spindle 41 from continuing to move downward.

[0049] The first abutting boss 416 is a disc-shaped boss structure that protrudes radially outward along the first spindle 41.

[0050] Among them, the first lifting component 415 is spherical.

[0051] The second locking unit includes a second spindle 43 and multiple second hooks 44. The multiple second hooks 44 are arranged circumferentially along the control rod. The hinged ends of the second hooks 44 are hinged in the absorber 3. The hook ends of the second hooks 44 extend into the follower 2. The end of the second spindle 43 is provided with a second opening and closing control body 431. The second opening and closing control body 431 is inserted between the multiple second hooks 44 to drive the hook ends of the multiple second hooks 44 to move radially outward along the control rod to engage with the second inner cavity protrusion 21 on the inner wall of the follower 2.

[0052] By arranging multiple second hooks 44 circumferentially along the control rod, the locking force can be evenly transmitted in the circumferential direction of the control rod, avoiding locking failure caused by localized force concentration. Simultaneously, the second hooks 44 are stably hinged within the absorber 3 via hinged ends, with the hook ends extending into the follower 2. Working in conjunction with the second opening / closing control body 431 at the end of the second spindle 43, the hook ends move radially, ultimately engaging with the second inner cavity protrusion 21 on the inner wall of the follower 2. This forms a multi-point, circumferentially symmetrical locking structure, significantly improving the stability of the connection between the absorber 3 and the follower 2. Even under complex conditions such as fluid impact and vibration within the nuclear reactor core, it effectively prevents relative separation between the two, ensuring the overall structural stability of the control rod.

[0053] The hinge end of the second hook 44 is hinged to the absorber 3 via a pivot, allowing the hook to rotate around the hinge point. Simultaneously, the hook tip of the second hook 44 extends into the internal space of the follower 2 and is radially opposite to the second inner cavity protrusion 21. The second opening / closing control body 431 moves downward with the second spindle 43 and inserts between multiple second hooks 44 arranged circumferentially along the control rod. During movement, it generates a radially outward thrust on the inner side of the second hooks 44, forcing them to swing radially outward around their respective hinge ends. This causes the hook tips to unfold radially outward along the control rod. The outwardly unfolded hook tips of the second hooks 44 engage with the second inner cavity protrusion 21 on the inner wall of the follower 2, forming an abutment in the opposite direction of the insertion direction of the second spindle 43, thus stably connecting the follower 2 and the absorber 3 and achieving reliable locking between them. Conversely, when the second opening and closing control body 431 moves in the opposite direction with the second spindle 43, the supporting force of the second opening and closing control body 431 on the second hook 44 disappears, the hook end of the second hook 44 can be retracted, and the engagement with the second inner cavity protrusion 21 is released, thereby realizing the unlocking of the follower body 2 and the absorber body 3.

[0054] The second opening and closing control body 431 is roughly spherical in shape, and its diameter is larger than that of the second spindle 43 connected to it.

[0055] The second hook 44 is roughly Z-shaped, and the second inner cavity protrusion 21 is roughly a boss structure extending radially inward along the follower body 2. The second hook 44 hooks onto the bottom surface of the second inner cavity protrusion 21. The second spindle 43 abuts against the first spindle 41 below, meaning that the second spindle 43 has moved downward to its limit position. Through the hook connection between the second hook 44 and the second inner cavity protrusion 21, the follower body 2 and the absorber body 3 can be locked together.

[0056] The number of second hooks 44 is four, and the four second hooks 44 are evenly arranged along the circumference of the control rod.

[0057] The second spindle 43 includes a second upper section 432 and a second lower section 433. The second upper section 432 and the second lower section 433 are detachably connected. A second lifting member 434 is provided at the top of the second upper section 432. A second opening and closing control body 431 is provided at the bottom of the second lower section 433. A second abutting boss 435 is provided on the outer peripheral wall of the second lower section 433. The second abutting boss 435 is used to abut against the top of the second hook 44 to form a limit.

[0058] By setting up a second upper section 432 and a second lower section 433 and making them detachably connected, if only one section of the second spindle 43 has a problem during the inspection or maintenance of the control rod, it is not necessary to replace the entire second spindle 43. Only the damaged section needs to be disassembled and replaced, which reduces spare parts costs and maintenance workload. At the same time, it is also convenient to inspect, repair or replace each section of the second spindle 43 individually, improving the flexibility and efficiency of maintenance operations.

[0059] The upper section 432 and the lower section 433 are connected by threads and then fixed with pins.

[0060] The bottom of the second opening and closing control body 431 is provided with an abutment post 436, which abuts against the top of the first spindle 41 to form a limit.

[0061] The abutment post 436 is a cylindrical structure, and it is vertically arranged, meaning its central axis is vertical. The top center of the abutment post 436 is connected to the bottom center of the second opening and closing control body 431, and the bottom of the abutment post 436 is used to abut against the top center of the first spindle 41.

[0062] Specifically, the abutment post 436 is coaxially arranged with the second spindle 43.

[0063] The hinged end of the first hook 42 is hinged to the follower body 2 via a pivot. The hook tip of the first hook 42 extends radially outward along the drive mechanism connector 1 to engage with the first inner cavity protrusion 11 extending radially inward along the drive mechanism connector 1. The hinged end of the second hook 44 is hinged to the absorber body 3 via a pivot. The hook tip of the second hook 44 extends radially outward along the follower body 2 to engage with the second inner cavity protrusion 21 extending radially inward along the follower body 2.

[0064] The hinged end of the first hook 42 is hinged to the follower body 2 via a pivot, and the hinged end of the second hook 44 is hinged to the absorber body 3 via a pivot. The pivot structure provides a stable and flexible support point for the hooks, preventing the hooks from becoming loose or shifting during long-term opening and closing operations, ensuring that the hooks always rotate around a fixed axis, and guaranteeing the consistency of the action trajectory.

[0065] The hook end of the first hook 42 extends outward along the radial direction of the drive mechanism connector 1, and then engages with the first inner cavity protrusion 11 that extends inward along the radial direction of the drive mechanism connector 1, ensuring good connection stability. In addition, when the first spindle 41 moves downward to the limit position, a stable connection between the follower 2 and the drive mechanism connector 1 can be achieved.

[0066] The hook end of the second hook 44 extends outward along the radial direction of the follower body 2, and then engages with the second inner cavity protrusion 21 that extends inward along the radial direction of the follower body 2, ensuring good connection stability. In addition, the bottom of the second spindle 43 abuts against the first spindle 41, which can realize a stable connection between the absorber body 3 and the follower body 2.

[0067] The absorber 3 includes a lower connector 31, a radial hole 311 is provided on the lower connector 31, a guide block 5 is provided in the radial hole 311, a guide hole 51 is provided on the guide block 5, the guide hole 51 is provided along the axial direction of the absorber 3, and the second lower section 433 passes through the guide hole 51.

[0068] By providing a guide block 5 on the lower connector 31 and having the second lower section 433 pass through the guide hole 51, stable axial guidance and radial support can be provided for the lower section of the second spindle 43. During the process of the second spindle 43 driving the second opening and closing control body 431 to control the opening and closing of the second claw 44, the guide hole 51 can restrict the second spindle 43 to move only axially.

[0069] The guide block 5 is roughly cylindrical in shape, and the guide hole 51 penetrates the guide block 5 radially. The guide hole 51 is slightly larger than the second abutment boss 435, so that the second abutment boss 435 can pass through the guide hole 51 from top to bottom.

[0070] The guide block 5 has a thread on its outer peripheral wall at one end. After the guide block 5 is inserted into the radial hole 311, it is threaded into the radial hole 311 and thus fixed.

[0071] The absorber 3 includes an upper connector 32 and a locking part including a third locking unit. The third locking unit is disposed on the upper connector 32. An annular groove 437 is provided on the second upper section 432 along the circumferential direction. The third locking unit is engaged with the annular groove 437 to limit the second spindle 43.

[0072] By engaging the third locking unit of the connector 32 on the absorber 3 with the circumferential annular groove 437 on the upper section of the second spindle 43, a reliable limit can be formed on the second spindle 43 in the axial direction of the control rod, effectively restricting the axial movement of the second spindle 43.

[0073] In this system, after the second spindle 43 drives the second opening and closing control body 431 to control the second hook 44 to engage and lock with the second inner cavity protrusion 21 on the inner wall of the follower body 2, the cooperation between the third locking unit and the annular groove 437 can prevent the second spindle 43 from undergoing axial displacement, avoid the second opening and closing control body 431 from weakening or disappearing its support force on the second hook 44, and thus prevent the second hook 44 from loosening or disengaging from the second inner cavity protrusion 21, ensuring the stability of the locking state of the absorber body 3 and the follower body 2, while providing stable axial support for the first spindle 41, and ensuring the operational reliability of the entire locking system.

[0074] The locking structure between the third locking unit and the annular groove 437 allows the second spindle 43 to be easily removed from the connector 32 on the absorber 3 when it is necessary to inspect or replace the second spindle 43.

[0075] The annular groove 437 extends circumferentially along the second upper section 432 to form an annular shape, and the groove depth of the annular groove 437 is radially opposite to that of the second upper section 432. The third locking unit is inserted radially into the annular groove 437, so that the third locking unit engages with the annular groove 437 to limit the movement of the second spindle 43.

[0076] The third locking unit includes an elastic element 61 and a ball 62. A radial mounting groove is provided on the upper edge of the upper connector 32. One end of the elastic element 61 is fixed in the radial mounting groove, and the other end is connected to the ball 62. The ball 62 is located on the side of the elastic element 61 close to the second spindle 43. The elastic element 61 applies an elastic force to the ball 62 to push the ball 62 into the annular groove 437.

[0077] By continuously applying an elastic force to the ball 62 through the elastic element 61 installed in the radial mounting groove of the upper connector 32, the ball 62 can be stably pushed into the annular groove 437 of the upper section of the second spindle 43, forming a tight and reliable locking and limiting, ensuring that the ball 62 fits against the inner wall of the groove, and effectively limiting the axial movement of the second spindle 43. When it is necessary to disassemble or install the second spindle 43, applying an appropriate axial force to the second spindle 43 can overcome the elastic force of the elastic element 61 and push the ball 62 out of the annular groove 437, releasing the limiting state.

[0078] The clamping force of the elastic element 61 can be adjusted by the clamping nut at one end of the spring-loaded ball 62, thereby controlling the spindle operating force to be at a suitable level.

[0079] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0080] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A segmented control rod with a locking function, characterized in that, The device includes a drive mechanism connector (1), a follower (2), an absorber (3), and a locking part. The locking part includes a first locking unit and a second locking unit. The first locking unit is disposed in the drive mechanism connector (1) and the follower (2) to lock the drive mechanism connector (1) and the follower (2). The second locking unit is disposed in the follower (2) and the absorber (3) to lock the follower (2) and the absorber (3). The second locking unit is connected to the first locking unit to limit the first locking unit.

2. The segmented control rod according to claim 1, characterized in that, The first locking unit is disposed in the drive mechanism connector (1) and the follower (2) along the axial direction of the control rod, and the second locking unit is disposed in the absorber (3) and the locking part along the axial direction of the control rod. The second locking unit abuts against the first locking unit along the axial direction of the control rod to limit the first locking unit in the drive mechanism connector (1) and the follower (2) along the axial direction of the control rod.

3. The segmented control rod according to claim 1, characterized in that, The first locking unit includes a first spindle (41) and a plurality of first claws (42). The plurality of first claws (42) are arranged circumferentially along the control rod. The hinged ends of the first claws (42) are hinged in the follower body (2). The hook ends of the first claws (42) extend into the drive mechanism connector (1). The end of the first spindle (41) is provided with a first opening and closing control body (411). The first opening and closing control body (411) is inserted between the plurality of first claws (42) to drive the hook ends of the plurality of first claws (42) to move radially outward along the control rod to engage with the first inner cavity protrusion (11) on the inner wall of the drive mechanism connector (1).

4. The segmented control rod according to claim 3, characterized in that, The outer peripheral wall of the first mandrel (41) is provided with a plurality of ribs (412), the ribs (412) extend along the axial direction of the first mandrel (41), the plurality of ribs (412) are divided into multiple groups, the ribs (412) in each group are arranged along the axial direction of the first mandrel (41), the plurality of ribs (412) in each group are evenly arranged along the circumference of the first mandrel (41), and the end of the rib (412) away from the first mandrel (41) is an arc surface; The first mandrel (41) includes a first upper section (413) and a first lower section (414). The first upper section (413) and the first lower section (414) are detachably connected. A first lifting member (415) is provided at the top of the first upper section (413). The first opening and closing control body (411) is provided at the bottom of the first lower section (414). A first abutting boss (416) is provided on the outer peripheral wall of the first lower section (414). The first abutting boss (416) is used to abut against the top of the first hook (42) to form a limit.

5. The segmented control rod according to claim 4, characterized in that, The second locking unit includes a second spindle (43) and a plurality of second claws (44). The plurality of second claws (44) are arranged circumferentially along the control rod. The hinged ends of the second claws (44) are hinged in the absorber (3). The hook ends of the second claws (44) extend into the follower (2). The end of the second spindle (43) is provided with a second opening and closing control body (431). The second opening and closing control body (431) is inserted between the plurality of second claws (44) to drive the hook ends of the plurality of second claws (44) to move radially outward along the control rod to engage with the second inner cavity protrusion (21) on the inner wall of the follower (2).

6. The segmented control rod according to claim 5, characterized in that, The second spindle (43) includes a second upper section (432) and a second lower section (433). The second upper section (432) and the second lower section (433) are detachably connected. A second lifting member (434) is provided at the top of the second upper section (432). The second opening and closing control body (431) is provided at the bottom of the second lower section (433). A second abutting boss (435) is provided on the outer peripheral wall of the second lower section (433). The second abutting boss (435) is used to abut against the top of the second hook (44) to form a limit. The bottom of the second opening and closing control body (431) is provided with an abutment post (436), which abuts against the top of the first spindle (41) to form a limit.

7. The segmented control rod according to claim 5, characterized in that, The hinge end of the first hook (42) is hinged to the follower (2) by a pivot. The hook end of the first hook (42) extends outward along the radial direction of the drive mechanism connector (1) to engage with the first inner cavity protrusion (11) extending inward along the radial direction of the drive mechanism connector (1). The hinge end of the second hook (44) is hinged to the absorber (3) via a pivot. The hook end of the second hook (44) extends radially outward along the follower (2) to engage with the second inner cavity protrusion (21) extending radially inward along the follower (2).

8. The segmented control rod according to claim 6, characterized in that, The absorber (3) includes a lower connector (31), a radial hole (311) is provided on the lower connector (31), a guide block (5) is provided in the radial hole (311), a guide hole (51) is provided on the guide block (5), the guide hole (51) is provided along the axial direction of the absorber (3), and the second lower section (433) passes through the guide hole (51).

9. The segmented control rod according to claim 6, characterized in that, The absorber (3) includes an upper connector (32), and the locking part includes a third locking unit. The third locking unit is disposed on the upper connector (32). An annular groove (437) is provided on the second upper section (432) along the circumferential direction. The third locking unit is engaged with the annular groove (437) to limit the second spindle (43).

10. The segmented control rod according to claim 9, characterized in that, The third locking unit includes an elastic element (61) and a ball (62). The upper connector (32) is provided with a radial mounting groove along its upper edge. One end of the elastic element (61) is fixed in the radial mounting groove, and the other end is connected to the ball (62). The ball (62) is located on the side of the elastic element (61) near the second spindle (43). The elastic element (61) applies an elastic force to the ball (62) to push the ball (62) into the annular groove (437).

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