Rod-shaped control rod with floating guide device

Abstract

The invention provides a rod-shaped control rod with a floating type guide device, the rod-shaped control rod comprises a rod body and a guide device, the guide device comprises a radial elastic piece, an axial sliding piece and a connecting seat, and the connecting seat is arranged on the rod body and can slide in the radial direction of the rod body; the radial elastic piece is arranged between the connecting seat and the rod body so as to apply outward elastic force in the radial direction of the rod body to the connecting seat; the axial sliding piece is rotationally arranged on the connecting base, and at least one part of the axial sliding piece extends out of the rod body in the radial direction of the rod body. By arranging the axial sliding piece, rolling friction is formed between the control rod and the movement channel, and the friction degree between the control rod and the movement channel in the up-down movement and hydraulic vibration process is reduced. By arranging the radial elastic piece, radial outward elastic force can be applied to the connecting seat, so that the axial sliding piece always keeps elastic contact with the movement channel, centering deviation caused by factors such as installation errors and vibration is offset, and it is ensured that the control rod always keeps a stable posture in the movement process.

Description

Technical Field

[0001] This application belongs to the field of nuclear reactor core technology, specifically relating to a rod-shaped control rod with a floating guide device. 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 in the reactor, friction occurs between the control rods and the movement channels due to the up-and-down movement of the control rods, hydraulically induced vibrations, and the alignment effect between the control rods and their movement channels, resulting in wear of the control rods. During reactor shutdown and refueling, the control rods must be inspected, and they should not be used if the wear reaches a certain level.

[0004] Currently, the main measures taken by domestic and international reactor core control rod assemblies to reduce control rod wear include two approaches. One is to improve the wear resistance of the control rod surface through nitriding or chrome plating. However, the adoption of nitriding or chrome plating processes increases the production process and manufacturing difficulty. The other approach is to increase the flexibility of the control rod to reduce friction between the control rod and its movement channel. However, for large-diameter control rods, the flexibility is relatively small, making this method of increasing control rod flexibility to reduce friction less ideal. Summary of the Invention

[0005] Therefore, the technical problem to be solved by this application is to provide a rod-shaped control rod with a floating guide device, which can reduce wear of the control rod.

[0006] To address the aforementioned problems, this application provides a rod-shaped control rod with a floating guide device, comprising a rod body and a guide device. The guide device includes a radial elastic element, an axial sliding element, and a connecting seat. The connecting seat is disposed on the rod body and is capable of sliding radially along the rod body. The radial elastic element is disposed between the connecting seat and the rod body to apply an elastic force radially outward to the connecting seat. The axial sliding element is rotatably disposed on the connecting seat, and at least a portion extends radially beyond the rod body.

[0007] Optionally, the axial sliding member includes a roller, the extension direction of the rotational axis of the roller is perpendicular to the axial direction of the rod, and the rolling direction of the roller is the axial direction of the rod.

[0008] Optionally, the connecting seat is provided with a mounting groove and a rotating shaft, and the roller is rotatably disposed in the mounting groove via the rotating shaft, with at least a portion of the roller located outside the mounting groove.

[0009] Optionally, the connecting seat includes a stop section, one end of the radial elastic member abuts against the stop section, and the other end abuts against the rod body.

[0010] Optionally, the connecting seat includes a sleeve section located on the side of the stop section near the radial elastic member, the outer diameter of the sleeve section being smaller than the outer diameter of the stop section, and the radial elastic member being sleeved on the outer periphery of the sleeve section.

[0011] Optionally, the guiding device includes a limiting member detachably connected to the rod body, the limiting member abutting against the connecting seat to limit the connecting seat in a radially outward direction of the rod body.

[0012] Optionally, the limiting member is provided with a receiving groove, the connecting seat is disposed in the receiving groove, the side of the stop section away from the radial elastic member abuts against the bottom of the receiving groove, a through hole is provided on the bottom of the receiving groove, the through hole penetrates the bottom of the groove along the radial direction of the rod body, and the axial sliding member passes through the limiting member through the through hole.

[0013] Optionally, the limiting member is threadedly connected to the rod body, the limiting member is provided with a fastening groove, and the outer peripheral wall of the rod body is provided with a positioning mark. When the limiting member is assembled in place, the fastening groove is opposite to the positioning mark.

[0014] Optionally, the outer peripheral wall of the rod is provided with a countersunk hole, the countersunk hole including a first hole segment and a second hole segment arranged sequentially outward along the diameter of the rod, the diameter of the first hole segment is smaller than the diameter of the second hole segment, the end of the radial elastic member away from the stop segment abuts against the first hole segment, and the limiting member is threadedly connected to the hole wall of the second hole segment.

[0015] Optionally, the rod body is provided with a plurality of the guide devices in the circumferential direction, and the plurality of guide devices are evenly arranged along the circumferential direction of the rod body; at least two guide devices are provided in the axial direction of the rod body.

[0016] Beneficial effects: The embodiment of this invention provides a rod-shaped control rod with a floating guide device. By setting an axial sliding member, the control rod and the motion channel experience rolling friction, reducing the degree of friction between the control rod and the motion channel during up-and-down movement and hydraulic vibration. This reduces wear on the control rod surface, preventing it from becoming unusable due to wear reaching a threshold, and effectively extending the service life of the control rod. A connecting seat provides installation positions for the radial elastic member and the axial sliding member. The radial elastic member applies a radially outward elastic force to the connecting seat, ensuring that the axial sliding member maintains elastic contact with the motion channel. This, combined with the connecting seat sliding radially along the rod body, automatically adjusts the gap between the control rod and the motion channel, offsetting alignment deviations caused by installation errors, vibrations, etc. This ensures the control rod maintains a stable posture during movement, avoiding increased friction or movement jamming caused by poor alignment, and achieving more precise and reliable guidance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a rod-shaped control rod with a floating guide device according to an embodiment of this application; Figure 2 for Figure 1 Sectional view at point AA; Figure 3 for Figure 2 Enlarged view of point B in the middle; Figure 4 This is a first-view structural schematic diagram of the connector according to an embodiment of this application; Figure 5 This is a second-view structural schematic diagram of the connector according to an embodiment of this application; Figure 6 This is a first-view structural schematic diagram of the limiting member according to an embodiment of this application; Figure 7 This is a second-view structural schematic of the limiting member in an embodiment of this application.

[0018] The reference numerals in the attached figures are as follows: 1. Radial elastic element; 2. Axial sliding element; 3. Connecting seat; 31. Mounting groove; 32. Shaft hole; 33. Rotating shaft; 34. Stop section; 35. Sleeve section; 4. Limiting element; 41. Receiving groove; 42. Through hole; 43. Fastening groove; 5. Rod body; 51. Mounting countersunk hole; 6. Upper connector of absorber; 7. Absorber; 8. Lower connector of absorber. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] See also Figures 1 to 7 As shown, according to an embodiment of this application, a rod-shaped control rod with a floating guide device is provided, including a rod body 5 and a guide device. The guide device includes a radial elastic member 1, an axial sliding member 2, and a connecting seat 3. The connecting seat 3 is disposed on the rod body 5 and is capable of sliding radially along the rod body 5. The radial elastic member 1 is disposed between the connecting seat 3 and the rod body 5 to apply an elastic force to the connecting seat 3 radially outward along the rod body 5. The axial sliding member 2 is rotatably disposed on the connecting seat 3, and at least a portion extends radially beyond the rod body 5.

[0024] By incorporating the axial sliding member 2, rolling friction is achieved between the control rod and the motion channel, reducing the degree of friction between the control rod and the motion channel during up-and-down movement and hydraulic vibration. This reduces wear on the control rod surface, preventing it from becoming unusable due to wear reaching a threshold and effectively extending its service life. The connecting seat 3 provides mounting positions for the radial elastic member 1 and the axial sliding member 2. The radial elastic member 1 applies a radially outward elastic force to the connecting seat 3, ensuring that the axial sliding member 2 maintains elastic contact with the motion channel. This, combined with the connecting seat 3 sliding radially along the rod body 5, automatically adjusts the gap between the control rod and the motion channel, offsetting alignment deviations caused by installation errors, vibrations, etc. This ensures the control rod maintains a stable posture during movement, preventing increased friction or movement jamming caused by poor alignment, and achieving more precise and reliable guidance.

[0025] The radial elastic element 1 provides a buffering effect against vibration, reducing its interference with the contact state between the control rod and the motion channel. Meanwhile, the rolling structure of the axial sliding element 2 ensures smooth up-and-down movement of the control rod, maintaining a stable motion even under fluctuating operating conditions, thus providing strong support for controlling core reactivity, achieving normal shutdown, and regulating power.

[0026] The rod-shaped control rod with a floating guide device in this embodiment does not require complex surface treatment processes such as nitriding or chrome plating to improve wear resistance, nor does it require special design to increase the flexibility of the control rod. The wear reduction and guiding functions can be achieved simply by the rod body 5 and the guide device. The structural design is simple, the components are easy to assemble, reducing the complexity of the manufacturing process and production cost of the control rod, and also facilitating subsequent inspection and maintenance.

[0027] The rod body 5 includes an absorption section, which comprises an upper absorber connector 6, an absorber 7, and a lower absorber connector 8. Guide devices are arranged at the upper absorber connector 6 and the lower absorber connector 8 to guide and stabilize the control rod.

[0028] Among them, rod 5 is roughly cylindrical in structure.

[0029] The axial sliding member 2 includes a roller, the extension direction of the rotation axis of the roller is perpendicular to the axial direction of the rod 5, and the rolling direction of the roller is the axial direction of the rod 5.

[0030] By aligning the roller's rolling direction with the axis of the control rod 5, the roller can precisely match the vertical movement trajectory of the control rod within the reactor. When the control rod moves axially, the roller can smoothly roll along the inner wall of the movement channel, avoiding jamming and uneven wear caused by misalignment between the roller's rolling direction and the control rod's movement direction. This ensures continuous movement of the control rod during operations such as adjusting reactivity and starting / stopping the reactor, thereby improving control efficiency.

[0031] The roller is rotatably mounted in the mounting groove 31 of the connecting seat 3 via a rotating shaft 33. The extension direction of the roller's rotation axis is perpendicular to the axial direction of the rod 5, thus limiting the roller's rolling direction to the axial dimension of the rod 5. When the roller rotates around the rotating shaft 33, the rolling surface of the roller in contact with the external motion channel will only roll along the length direction of the rod 5, that is, along the direction in which the control rod needs to move up and down. It will not deviate circumferentially or radially from the rod 5, ensuring that the roller's rolling direction precisely matches the movement requirements of the control rod. The rolling direction of the roller, axially relative to the rod 5, refers to the direction of movement of the outermost rolling surface.

[0032] Specifically, the rod body 5 is set vertically, the rotation axis of the roller extends horizontally, and the rolling direction of the roller is vertical.

[0033] The connecting seat 3 is provided with a mounting groove 31 and a rotating shaft 33. The roller is rotatably mounted in the mounting groove 31 via the rotating shaft 33, and at least a part of the roller is located outside the mounting groove 31.

[0034] By providing a mounting groove 31 on the connecting seat 3, a precise accommodating space is provided for the roller, limiting its movement and preventing it from shifting or falling off during rolling. Simultaneously, the rotating shaft 33 provides stable rotational support for the roller, ensuring smooth rotation around a fixed axis. By ensuring at least a portion of the roller lies outside the mounting groove 31, after assembly, the outer portion of the roller protrudes from the connecting seat 3, effectively contacting the inner wall of the control rod's movement channel. This ensures that the roller remains in contact with the movement channel during control rod movement to function effectively.

[0035] When assembling the roller, the rotating shaft 33 and the connecting seat 3, the roller is first installed into the mounting groove 31 of the connecting seat 3, and the central shaft hole 32 of the roller is aligned with the shaft hole 32 of the connecting seat 3. Then the rotating shaft 33 is installed, and finally the rotating shaft 33 is spot welded to the connecting seat 3.

[0036] The size and shape of the mounting groove 31 are adapted to the size and shape of the roller.

[0037] The connecting seat 3 includes a stop section 34, one end of the radial elastic member 1 abuts against the stop section 34, and the other end abuts against the rod body 5.

[0038] By setting the stop section 34, a stable force support point can be provided for the radial elastic element 1. One end of the radial elastic element 1 abuts against the stop section 34, and the other end abuts against the rod body 5, ensuring that the elastic force of the elastic element is accurately applied to the connecting seat 3, avoiding the elastic element from being skewed or misaligned due to the force point offset, thereby ensuring that the connecting seat 3 can slide stably along the radial direction of the rod body 5, so that the axial sliding element 2 can maintain reliable elastic contact with the movement channel, ensuring the stable operation of the guiding function.

[0039] Among them, the stop section 34 is part of the connecting seat 3. The connecting seat 3 can be an integral structure, and the stop section 34 is directly formed during the forming process of the connecting seat 3.

[0040] Among them, the connecting seat 3 is roughly cylindrical, and the stop section 34 is the part of the connecting seat 3 that protrudes outward in the radial direction.

[0041] Specifically, the stop section 34 is located approximately in the middle of the axial direction of the connecting seat 3, and the stop section 34 protrudes outward in the radial direction of the connecting seat 3. The stop section 34 extends in an arc or circle along the circumference of the connecting seat 3, thereby forming an outwardly extending platform.

[0042] Among them, the radial elastic element 1 is a spring, one end of the radial elastic element 1 abuts against the wall surface of the stop section 34, and the radial elastic element 1 is approximately perpendicular to the stop section 34.

[0043] When the stop section 34 extends in an arc shape along the circumference of the connecting seat 3, the stop section 34 is roughly evenly distributed along the circumference of the connecting seat 3.

[0044] The connecting seat 3 includes a sleeve section 35, which is located on the side of the stop section 34 near the radial elastic member 1. The outer diameter of the sleeve section 35 is smaller than the outer diameter of the stop section 34, and the radial elastic member 1 is sleeved on the outer periphery of the sleeve section 35.

[0045] By setting the sleeve section 35, the elastic element can be radially limited, preventing lateral displacement or skew when it is subjected to force, expansion, contraction, or vibration. At the same time, the stop section 34 can axially block the elastic element, preventing it from moving along the axis of the rod 5, ensuring that the elastic element is always in the preset assembly position, stably providing radial elastic support to the connecting seat 3, and laying a structural foundation for the reliable operation of the guiding device.

[0046] The sleeve section 35 is roughly cylindrical, and the diameter of the sleeve section 35 is adapted to the radial elastic member 1, so that the radial elastic member 1 can be stably sleeved on the outer periphery of the sleeve section 35.

[0047] The socket section 35 and the connecting seat 3 are approximately coaxial.

[0048] The guiding device includes a limiting member 4, which is detachably connected to the rod body 5. The limiting member 4 abuts against the connecting seat 3 to limit the connecting seat 3 in the radially outward direction of the rod body 5.

[0049] By making the limiting member 4 abut against the connecting seat 3, the connecting seat 3 can be effectively constrained in the radial outward direction of the rod body 5, preventing the connecting seat 3 from sliding outward excessively and leaving the preset assembly range, ensuring that the connecting seat 3 is always in a stable working position, and maintaining the integrity and reliability of the overall structure of the guide device.

[0050] Among them, the limiting component 4 adopts a detachable connection method. During subsequent maintenance or component replacement, only the limiting component 4 needs to be removed to easily take out components such as the connecting seat 3 and the radial elastic component 1. There is no need to perform complex processing or disassembly on the rod body 5 itself, which greatly reduces the maintenance difficulty and improves the maintainability of the equipment.

[0051] The shape and size of the limiting member 4 match the connecting seat 3, so that the connecting seat 3 can abut against the limiting member 4 in the radial outward direction of the rod body 5, thereby achieving the limiting.

[0052] The limiting member 4 is provided with a receiving groove 41, the connecting seat 3 is provided in the receiving groove 41, the stop section 34 abuts against the bottom of the receiving groove 41 on the side away from the radial elastic member 1, and a through hole 42 is provided on the bottom of the receiving groove 41. The through hole 42 penetrates the bottom of the groove along the radial direction of the rod 5, and the axial sliding member 2 passes through the limiting member 4 through the through hole 42.

[0053] By providing the receiving groove 41, a suitable installation space can be provided for the connecting seat 3, forming a dual constraint on the connecting seat 3 in both the circumferential and axial directions. This prevents the connecting seat 3 from swaying or shaking during the movement of the rod body 5 or hydraulic vibration, ensuring that the connecting seat 3 is always in the preset working posture. At the same time, the abutting fit between the stop section 34 and the bottom of the receiving groove 41 further fixes the axial position of the connecting seat 3, preventing it from moving along the axial direction of the rod body 5, ensuring the relative positional stability of each component of the guiding device, and improving the reliability of the overall structure.

[0054] Among them, the through hole 42 at the bottom of the receiving groove 41 is a groove-shaped hole, the shape and size of which are adapted to the axial sliding member 2, providing a precise through channel for the axial sliding member 2, ensuring that the roller can extend out of the limiting member 4 and form effective contact with the motion channel, thereby realizing the rolling friction reduction and guiding functions.

[0055] Specifically, the through hole 42 is elongated and adapted to the roller, and the length direction of the through hole 42 is the axial direction of the rod 5.

[0056] Specifically, the through hole 42 is located in the middle of the bottom of the receiving groove 41, making the receiving groove 41 roughly stepped, and the bottom of the receiving groove 41 is a stepped surface.

[0057] Specifically, the width of the receiving groove 41 is adapted to the connecting seat 3, and the depth of the receiving groove 41 is less than the length of the connecting seat 3 in the corresponding direction. The connecting seat 3 can only be partially inside the receiving groove 41, and the other part is inside the mounting countersunk hole 51 on the rod body 5.

[0058] The limiting member 4 is threadedly connected to the rod body 5. The limiting member 4 is provided with a fastening groove 43, and the outer peripheral wall of the rod body 5 is provided with a positioning mark. When the limiting member 4 is assembled in place, the fastening groove 43 is opposite to the positioning mark.

[0059] By using a threaded connection between the limiting component 4 and the rod body 5, the limiting component 4 and the rod body 5 can be connected simply and stably. At the same time, when the limiting component 4 is assembled in place, its fastening groove 43 is aligned with the positioning mark on the rod body 5, which can serve as a direct basis for judging whether the assembly is in place, avoiding problems such as roller direction deviation and insufficient elastic force caused by assembly deviation, and ensuring the reliable functioning of the guiding device.

[0060] By setting a fastening groove 43 on the limiting member 4, a stable force application point can be provided for the assembly tool, making it easy to quickly complete the tightening or disassembly of the limiting member 4 with the tool.

[0061] There are multiple fastening grooves 43, which are evenly distributed on the outer periphery of the limiting member 4. Specifically, there are four fastening grooves 43.

[0062] The fastening groove 43 extends into a groove along the axial and radial directions of the limiting member 4.

[0063] The positioning mark can be the positioning groove on the outer peripheral wall of the rod 5. After the limiting part 4 is assembled in place, the fastening groove 43 is aligned with the positioning grooves of the upper connector 6 and the lower connector 8 of the absorber.

[0064] The outer peripheral wall of the rod body 5 is provided with a countersunk hole 51. The countersunk hole 51 includes a first hole section and a second hole section arranged sequentially outward along the diameter of the rod body 5. The diameter of the first hole section is smaller than the diameter of the second hole section. The end of the radial elastic member 1 away from the stop section 34 abuts against the first hole section. The limiting member 4 is threadedly connected to the hole wall of the second hole section.

[0065] By setting the mounting countersunk hole 51 into a stepped first and second section, a clear functional zoning is achieved. The smaller diameter first section provides dedicated space for the radial elastic element 1, which can radially limit the elastic element and prevent lateral displacement or skewing when subjected to force, expansion, contraction, or vibration. The larger diameter second section accommodates the threaded connection requirements of the limiting element 4, ensuring the coaxiality and stability of the limiting element 4 when connected to the rod body 5, and the overall orderliness and reliability of the guiding device structure.

[0066] The first hole section limits the radial elastic element 1, allowing one end of the elastic element to stably abut against the bottom of the hole, while the other end precisely acts on the stop section 34 of the connecting seat 3, ensuring that the elastic force is transmitted evenly and efficiently along the radial direction of the rod body 5, and pushing the connecting seat 3 to drive the axial sliding element 2 to maintain stable elastic contact with the movement channel.

[0067] The outer peripheral wall of the limiting member 4 is provided with an external thread, and the hole wall of the second hole section is provided with a matching internal thread, thereby enabling the limiting member 4 to be threadedly connected to the second hole section.

[0068] During assembly, first insert the radial elastic element 1 into the mounting countersunk hole 51, then sleeve the radial elastic element 1 onto the sleeve section 35, and finally install the limiting element 4. The limiting element 4 is threadedly connected to the mounting countersunk hole 51. After the limiting element 4 is tightened, the direction of the axial sliding element 2 should be consistent with the axial direction of the rod body 5. The fastening groove 43 on the limiting element 4 is aligned with the positioning groove on the upper connector 6 and the lower connector 8 of the absorber.

[0069] Multiple guide devices are provided on the circumference of the rod body 5, and the multiple guide devices are evenly arranged along the circumference of the rod body 5. At least two guide devices are provided on the axial direction of the rod body 5.

[0070] Multiple guide devices are evenly arranged around the five circumferences of the rod to provide radial support to the control rod from multiple directions. This balances the radial force on the control rod, which is beneficial to its radial stability and prevents the control rod from tilting due to uneven force on one side. It effectively counteracts radial offset caused by factors such as hydraulic vibration and installation errors, ensuring that the control rod and the motion channel always maintain good alignment, reducing wear caused by excessive local contact pressure, and preventing motion jamming, thus ensuring the stable radial posture of the control rod.

[0071] By installing at least two guide devices along the axial direction of the control rod, multi-point guidance constraints can be formed for the axial movement of the control rod, which is beneficial to achieving axial stability of the control rod. Especially when the control rod moves up and down over long distances, multi-point axial guidance can ensure that its movement trajectory always follows the design path, improve the smoothness of movement, and provide more reliable movement guarantees for core reactivity control, normal shutdown and other operations.

[0072] Among them, multiple guide devices on the same circumference form a group, and at least two groups of guide devices are arranged along the axial direction of the rod 5.

[0073] Each group includes no fewer than three floating guide devices, and the floating guide devices in the same group are arranged in a circumferentially symmetrical manner.

[0074] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0075] 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 rod-shaped control rod having a floating guide device, characterized by The guiding device comprises a rod body (5) and a guiding device, the guiding device comprises a radial elastic member (1), an axial sliding member (2) and a connecting seat (3), the connecting seat (3) is arranged on the rod body (5) and can slide along the radial direction of the rod body (5); the radial elastic member (1) is arranged between the connecting seat (3) and the rod body (5) to apply an elastic force to the connecting seat (3) in the radial direction of the rod body (5); the axial sliding member (2) is rotatably arranged on the connecting seat (3) and at least a part thereof extends to the outside of the rod body (5) in the radial direction of the rod body (5).

2. The rod control rod with a floating guide according to claim 1, characterized in that, The axial sliding member (2) comprises a roller, the extension direction of the rotation axis of the roller is perpendicular to the axial direction of the rod body (5), and the rolling direction of the roller is the axial direction of the rod body (5).

3. The rod control rod according to claim 2, characterized in that The connecting seat (3) is provided with a mounting groove (31) and a rotating shaft (33), the roller is rotatably arranged in the mounting groove (31) through the rotating shaft (33), and at least a part of the roller is located outside the mounting groove (31).

4. The rod control rod according to claim 3, characterized in that The connecting seat (3) comprises a stop segment (34), one end of the radial elastic member (1) is abutted against the stop segment (34), and the other end is abutted against the rod body (5).

5. The rod control rod according to claim 4, characterized in that The connecting seat (3) comprises a sleeving segment (35), the sleeving segment (35) is located on the side of the stop segment (34) close to the radial elastic member (1), the outer diameter of the sleeving segment (35) is smaller than that of the stop segment (34), and the radial elastic member (1) is sleeved on the outer circumferential side of the sleeving segment (35).

6. The rod control rod of claim 4, wherein, The guiding device comprises a limiting member (4), the limiting member (4) is detachably connected to the rod body (5), and the limiting member (4) is abutted against the connecting seat (3) to limit the connecting seat (3) in the radial outward direction of the rod body (5).

7. The rod control rod according to claim 6, characterized in that The limiting member (4) is provided with a containing groove (41), the connecting seat (3) is arranged in the containing groove (41), one side of the stop segment (34) away from the radial elastic member (1) is abutted against the groove bottom of the containing groove (41), a through hole (42) is formed in the groove bottom of the containing groove (41) and penetrates the groove bottom in the radial direction of the rod body (5), and the axial sliding member (2) penetrates out of the limiting member (4) through the through hole (42).

8. The rod control rod according to claim 7, characterized in that The limiting member (4) is threadedly connected to the rod body (5), the limiting member (4) is provided with a fastening groove (43), the outer circumferential wall of the rod body (5) is provided with a positioning mark, and when the limiting member (4) is assembled in place, the fastening groove (43) is opposite to the positioning mark.

9. The rod control rod according to claim 8, characterized in that The outer peripheral wall of the rod body (5) is provided with a mounting counterbore (51), the mounting counterbore (51) comprises a first hole section and a second hole section arranged in turn along the diameter of the rod body (5) outward, the diameter of the first hole section is smaller than the diameter of the second hole section, one end of the radial elastic member (1) away from the stop section (34) abuts in the first hole section, and the limiting member (4) is threadedly connected with the hole wall of the second hole section.

10. The rod control rod of claim 1, wherein, The rod body (5) is provided with a plurality of guide devices in the circumferential direction, and the plurality of guide devices are uniformly arranged along the circumferential direction of the rod body (5); and the rod body (5) is provided with at least two guide devices in the axial direction.

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