A remote locking device for thermocouple support structure locking cup in underwater high irradiation environment

Abstract

The application discloses a thermocouple support structure locking cup remote locking device for underwater high irradiation environment and belongs to the technical field of nuclear power equipment maintenance. The application comprises an extension rod, a locking hydraulic cylinder, a positioning clamping piece and a clamping hydraulic cylinder, wherein the clamping hydraulic cylinder comprises a hollow outer cylinder fixed to the positioning clamping piece and a hollow plunger arranged in the hollow outer cylinder; wherein the end of the plunger rod is provided with an extension section, the extension section penetrates the hollow plunger, the end of the extension section is connected with a clamping pipe, the clamping pipe is hollow and is provided with a compression spring, and a floating hexagonal guide head is further arranged in the clamping pipe. Through the application, the working efficiency of the relocking operation of the thermocouple support locking structure can be effectively improved, and the working error can be reduced. The application can avoid the situation that the device cannot be returned due to single point failure during the whole locking process, and the safety of the operation is improved.

Description

Technical Field

[0001] This invention relates to a remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment, belonging to the field of nuclear power equipment maintenance technology. Background Technology

[0002] Thermocouples are sensing elements in automated process control systems and are a type of automated control instrument. Based on the thermoelectric effect, thermocouples are highly sensitive and reliable, and are frequently used in nuclear power generation to measure and monitor temperatures within nuclear reactors. In nuclear power, thermocouples are typically mounted on the reactor core structure via thermocouple support structures. However, the locking bolts and anti-loosening cups used to secure these supports may loosen over time, requiring regular maintenance and re-tightening of the support structure.

[0003] In existing technologies, the re-locking operation of thermocouple support structures generally suffers from long operation time, inability to lock in one go, and low work efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a remote locking device for the locking cup of a thermocouple support structure in an underwater high-irradiation environment, which solves the problem of low efficiency in the re-locking operation of thermocouple support structures in the prior art.

[0005] The technical problem to be solved by the present invention is achieved by the following technical solution: a remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment, including an extension rod for sending the entire locking device underwater;

[0006] A locking hydraulic cylinder includes a cylinder barrel connected to the end of the extension rod and a piston rod connected to the cylinder barrel;

[0007] A positioning clamping component is disposed below the cylinder.

[0008] The clamping hydraulic cylinder includes a hollow outer cylinder fixed to the positioning clamping member and a hollow plunger disposed inside the hollow outer cylinder;

[0009] The piston rod has an extension section at its end, which extends through the hollow plunger. The end of the extension section is connected to a clamping tube. The clamping tube is hollow and has a compression spring inside. A floating hexagonal guide head is also provided inside the clamping tube. The compression spring pushes the floating hexagonal guide head out of the inner cavity of the clamping tube.

[0010] By adopting the above technical solution, the working efficiency of re-locking the thermocouple support locking structure can be effectively improved, and working errors can be reduced. It can also prevent the device from failing to retract due to a single point of failure during the entire locking process, thus improving operational safety.

[0011] The present invention is further configured such that: a guide sleeve is fixedly connected to the lower end of the cylinder, and the piston rod and its extension section are movable within the guide sleeve.

[0012] By adopting the above technical solution, the guide sleeve provides radial support and axial guidance for the piston rod and its extension section over the entire length or a large range, effectively reducing radial offset or swaying of the piston rod during extension and retraction, and ensuring the straightness and stability of the motion trajectory.

[0013] The invention is further configured such that the locking device is equipped with an underwater camera.

[0014] By adopting the above technical solution, the underwater camera can transmit images of the relative position between the underwater locking device and the target interface in real time. Operators can visually monitor the docking process from the surface control room, achieving millimeter-level precise positioning and alignment, which greatly improves the accuracy and success rate of the locking operation.

[0015] The present invention is further configured such that: a punching head is provided at the lower end of the clamping tube, and at least two punching claws are provided at equal intervals around the end of the punching head, and the claw tips of the punching claws are provided with guide angles, the inclination angle of the guide angles being greater than 10°.

[0016] By adopting the above technical solution, the equidistantly distributed stamping claws ensure that the force is evenly transmitted along the circumference, avoiding stress concentration at single points and reducing the peak load on the clamping tube and the stamping head itself. At the same time, the stamping claws can press the locking cup onto the bolt head of the locking bolt, thereby effectively preventing the locking bolt from loosening.

[0017] The present invention is further configured such that: the extension section and the clamping tube are mutually engaged by a pin, and the guide sleeve is provided with a sliding groove that engages with the pin.

[0018] By adopting the above technical solution, axial rotation can be prevented during the extension and clamping tube extension process, ensuring that the bottom clamping tube can be effectively rotated by the extension rod to achieve re-tightening of the locking bolt.

[0019] The present invention is further configured such that: the positioning clamping member includes two vertical plates, and the two vertical plates form an installation groove for installing the clamping hydraulic cylinder, and a clamping gap is reserved between the lower ends of the two vertical plates for snapping onto the thermocouple support structure.

[0020] By adopting the above technical solution, the two vertical plates and the mounting groove formed in the middle together constitute a high-strength, deformation-resistant U-shaped structure, providing a stable mounting base for clamping the hydraulic cylinder. The clamping gap reserved between the two vertical plates can be directly and quickly snapped into the corresponding part of the thermocouple support structure, forming preliminary radial constraint and positioning.

[0021] The invention is further configured such that: a rotatable guide plate is provided on the vertical plate, a plurality of jet holes are evenly distributed on the guide plate, an airflow channel is provided on the guide plate and connected to the jet holes, and an air supply component is connected to the airflow channel; the jet angle can be controlled by adjusting the rotation angle of the guide plates on the two vertical plates.

[0022] By adopting the above technical solution, the rotation angle of the two guide plates is controlled to adjust the spray angle of the jet orifice. The reaction force generated by the gas ejected from the jet orifice can then propel the entire locking device underwater. This helps operators better control the locking device at the bottom of the extension rod for position adjustment, and more quickly and accurately locate the snap-fit ​​point of the bottom thermocouple support locking structure, thereby improving work efficiency.

[0023] The present invention is further configured such that: a plurality of guide grooves are provided on both sides of the guide plate.

[0024] By adopting the above technical solution, the overall weight of the guide plate can be effectively reduced. At the same time, when jetting at a specific angle, it can guide the water flow and reduce the resistance of the water flow to the guide plate.

[0025] The present invention is further configured such that a one-way closing plate is provided in the airflow channel.

[0026] By adopting the above technical solution, the flow direction of the airflow channel can be effectively restricted. After the guide plate is submerged in water along with the entire device, the one-way closing plate can isolate and seal the airflow channel under the impact of water pressure, preventing a large amount of water from rushing into the airflow channel and realizing one-way exhaust.

[0027] The beneficial effects of this invention are:

[0028] By setting two separate hydraulic cylinders to drive independently and control the clamping and locking actions of the device separately, the fault tolerance of the entire device can be improved, so that the device can be retracted by the two hydraulic cylinders when it is retracted, thereby reducing the chance of jamming.

[0029] The extension and retraction of the floating hexagonal guide head is controlled by a compression spring. When positioning the locking bolt hole, in conjunction with the underwater camera, the locking device and the thermocouple support locking structure are brought into contact. The compression spring then pushes the floating hexagonal guide head into the locking bolt hole, eliminating the need to adjust the axial rotation angle of the floating hexagonal guide head. As the floating hexagonal guide head rotates by rotating the extension rod, it is automatically pushed into the hole by the compression spring once it aligns with the hexagonal countersunk hole of the locking bolt, thus improving the insertion efficiency.

[0030] By setting up a guide plate, along with the air jets on it, the position of the entire locking device at the bottom of the extension rod can be adjusted more stably, allowing the locking device to more quickly and accurately locate the locking bolt. By adjusting the air jet angle of the guide plate, the resistance encountered by the locking device during its movement is changed, thereby controlling the moving speed of the locking device and further improving its alignment accuracy. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a front view of the present invention;

[0033] Figure 3 This is a three-dimensional structural diagram of the locking hydraulic cylinder and thermocouple support structure of the present invention;

[0034] Figure 4 This is an exploded view of the locking hydraulic cylinder of the present invention;

[0035] Figure 5 This is a cross-sectional view of the locking hydraulic cylinder and the clamping hydraulic cylinder of the present invention;

[0036] Figure 6 This is a three-dimensional structural diagram of the guide plate of the present invention;

[0037] Figure 7 This is a schematic diagram of the guide plate connection structure of the present invention;

[0038] Figure 8 This is a cross-sectional view of the airflow channel of the present invention;

[0039] Figure 9 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0040] In the diagram: 1. Extension rod; 2. Locking hydraulic cylinder; 201. Cylinder barrel; 202. Piston rod; 203. Extension section; 2031. Pin; 204. Clamping tube; 2041. Punch head; 205. Compression spring; 206. Floating hexagonal guide head; 207. Guide sleeve; 2071. Sliding groove; 3. Positioning clamping component; 301. Vertical plate; 302. Mounting groove; 303. Clamping gap; 4. Clamping hydraulic cylinder; 401. Hollow outer cylinder; 402. Hollow column 5. Plug; 501. Deflector plate; 502. Jet nozzle; 503. Airflow channel; 504. Deflector groove; 505. One-way closing plate; 506. Outward convex surface; 507. Inward concave surface; 6. Lifting ring; 7. Thermocouple support structure; 8. Torque wrench; 9. Air passage; 10. Limiting rod; 11. Drive motor; 12. Thermocouple; 13. Locking bolt; 14. Drive shaft; 15. Air storage ring; 16. Transition ring; 17. Guide rod; 18. Abutment part; 19. Locking cup. Detailed Implementation

[0041] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific illustrations.

[0042] like Figure 1 As shown, a remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment includes an extension rod 1 for sending the entire locking device underwater. A locking hydraulic cylinder 2 is connected to the lower end of the extension rod 1, and a clamping hydraulic cylinder 4 is located below the locking hydraulic cylinder 2. A positioning clamping component 3 is located between the locking hydraulic cylinder 2 and the clamping hydraulic cylinder 4. The upper end of the clamping hydraulic cylinder is fixedly connected to the positioning clamping component 3 by bolts, and the locking hydraulic cylinder 2 is rotatably connected to the upper end of the positioning clamping component 3. When the positioning clamping component 3 is engaged with the thermocouple support structure 7 in the underwater stack structure, rotating the extension rod 1 can drive the locking hydraulic cylinder 2 to rotate. The locking device is equipped with an underwater camera to assist in alignment operations and improve alignment accuracy.

[0043] like Figure 3 and Figure 4As shown, the locking hydraulic cylinder 2 includes a cylinder 201 fixedly connected to the end of the extension rod 1 and a piston rod 202 connected to the cylinder 201. The end of the piston rod 202 is also connected to an extension section 203, and the end of the extension section 203 is connected to a clamping tube 204 via a pin 2031. A floating hexagonal guide head 206 and a compression spring 205 are provided inside the clamping tube 204. The cross-section of the floating hexagonal guide head 206 and the cross-section of the clamping tube 204 are both regular hexagonal. The compression spring 205 can push the floating hexagonal guide head 206 outward along the axial direction of the clamping tube 204. At the same time, when the end of the floating hexagonal guide head 206 is subjected to external pressure, the external pressure can also push the floating hexagonal guide head 206 into the clamping tube 204 and compress the compression spring 205.

[0044] The clamping hydraulic cylinder 4 includes a hollow outer cylinder 401 and a hollow plunger 402 disposed inside the hollow outer cylinder 401. The end of the hollow plunger 402 is also provided with an abutment 18, which can abut against the upper surface of the thermocouple support structure 7 when the hollow plunger 402 extends or retracts.

[0045] In the specific operation process, such as Figure 2 As shown, during the rotation of the locking hydraulic cylinder 2, the piston rod 202, the extension section 203, and the clamping tube 204 can be driven to rotate, thereby driving the floating hexagonal guide head 206 inside the clamping tube 204 to rotate. When the entire locking device comes into contact with the thermocouple support structure 7 through the positioning clamping member 3 and the clamping hydraulic cylinder 4, the floating hexagonal guide head 206 can be automatically pushed into the locking bolt 13 above the thermocouple support structure 7 by the compression spring 205 during the rotation.

[0046] like Figure 3 As shown, the current thermocouple support structure 7 is typically connected via a locking bolt 13 and a locking cup 19. Figure 9As shown, the locking cup 19 is used to prevent the locking bolt 13 from loosening after it has been tightened. It is typically a hollow, cup-shaped iron shell. Several notches are evenly spaced along the circumference of the bolt head of the locking bolt 13. The locking cup 19, when fitted onto the locking bolt 13, forms a groove with the notches. By creating a through hole in the bottom of the cup, it fits onto the bolt head of the locking bolt 13. After the locking bolt 13 is fixed, pressing the locking cup 19 makes it fit against the notch surface of the locking bolt 13, thus removing the groove and reducing the possibility of subsequent loosening. Although the locking cup 19 increases the tightening force of the locking bolt 13, it is still inevitable that the locking bolt 13 will loosen to some extent after long-term use. Therefore, it is necessary to re-tighten the locking bolt 13 during maintenance. Traditional locking methods are prone to jamming during locking, causing the bottom locking structure and locking bolt 13 to become stuck and unable to be pulled out. Furthermore, the alignment accuracy of the hexagonal countersunk hole of locking bolt 13 is not high, requiring frequent adjustments to find the correct alignment angle, which greatly reduces the efficiency of the locking operation.

[0047] In this application, by using two separately driven hydraulic cylinders to control the contact between the positioning clamping component 3 and the thermocouple support structure 7, as well as the pressing and deformation of the locking cup 19, jamming can be effectively reduced. After the operation is completed, the entire device can be retracted by both driving hydraulic cylinders. Simultaneously, a specific positioning method is used, where the piston rod 202 and extension section 203, used to control the rotation and locking of the locking bolt 13, are inserted inside the clamping hydraulic cylinder 4. After the clamping hydraulic cylinder 4 aligns with the thermocouple support structure 7, the floating hexagonal guide head 206 can be directly rotated by rotating the extension rod 1. Under the thrust of the compression spring 205, the floating hexagonal guide head 206 can be directly inserted into the hexagonal countersunk hole of the locking bolt 13. At this point, rotating the extension rod 1 controls the knob of the locking bolt 13. Throughout the process, there is no need to specifically adjust the axial rotation angle of the floating hexagonal guide head 206, greatly reducing the difficulty of alignment and effectively improving work efficiency. This avoids situations where a single point of failure during the entire locking process prevents the device from retracting, thus improving operational safety.

[0048] It should be noted that the clamping hydraulic cylinder 4 is equipped with an oil port, which is connected to a single-acting manual pump through a hydraulic pipe. The locking hydraulic cylinder 2 is equipped with two oil ports, one above the other, which are connected to a double-acting manual pump through two hydraulic pipes.

[0049] like Figure 4As shown, a guide sleeve 207 is fixedly connected to the lower end of the cylinder 201, and the piston rod 202 and its extension 203 move within the guide sleeve 207. The guide sleeve 207 provides radial support and axial guidance for the piston rod 202 and its extension 203 over its entire length or a wide range. The extension 203 and the clamping tube 204 are engaged with each other by a pin 2031, and the guide sleeve has a sliding groove 2071 that engages with the pin 2031.

[0050] Specifically, through holes for inserting pins 2031 are provided along the diameter direction at the end of the extension section 203 and at the end of the clamping tube 204 connected to the extension section 203. During assembly, the guide sleeve 207 needs to be pre-fixed on the locking hydraulic cylinder 2. After inserting the end of the extension section 203 into the end of the holding tube, the two through holes and the sliding groove 2071 on the guide sleeve 207 are aligned with each other and the pin 2031 is inserted. At this time, by controlling the operation of the locking hydraulic cylinder 2, the extension section 203 and the clamping tube 204 can extend and retract within the guide sleeve 207. At the same time, the pin 2031 can slide along the sliding groove 2071, thereby preventing axial rotation of the extension section 203 and the clamping tube 204 during extension and retraction, so that the rotation of the locking bolt 13 can be stably controlled by the hexagonal guide head.

[0051] It should be noted that a sealing ring is provided between the guide sleeve 207 and the connecting surface of the locking hydraulic cylinder 2, which can seal the end of the locking hydraulic cylinder 2, thereby improving the safety of the locking hydraulic cylinder 2 during underwater operation and reducing the failure rate of the locking hydraulic cylinder 2.

[0052] like Figure 1 As shown, a lifting ring 6 is provided at the upper end of the extension rod 1. The extension rod 1 can be suspended or fixed to the corresponding lifting equipment through the lifting ring 6 to prevent the locking device from sinking directly into the water after it is released. At the same time, a hexagonal torque wrench 8 is also provided at the upper end of the extension rod 1 to assist in rotating the extension rod 1 and ensure that the re-tightening force of the locking bolt 13 meets the quality standard.

[0053] like Figure 4 As shown, a punch head 2041 is provided at the lower end of the clamping tube 204. At least two punching claws are equidistantly arranged on the circumference of the end of the punch head 2041. The claw tips are provided with guide angles. The tilt angle of the guide angle is greater than 10°. The equidistantly distributed punching claws make the force uniformly transmitted along the circumference, avoid stress concentration at a single point, and reduce the peak load of the clamping tube 204 and the punch head 2041 itself.

[0054] It should be noted that the stamping head 2041 and the clamping tube 204 are an integral structure.

[0055] In this embodiment, there are three stamping claws. The stamping claws can press the locking cup 19 onto the surface of the locking bolt 13 by the thrust of the clamping hydraulic cylinder 4, so that the locking cup 19 can produce uniform deformation and achieve locking at three points in one press.

[0056] like Figure 5 and Figure 6 As shown, the positioning clamping component 3 includes two vertical plates 301, which together form a mounting groove 302 for mounting and clamping the hydraulic cylinder 4. A clamping gap 303 is reserved between the lower ends of the two vertical plates 301 for engaging with the thermocouple support structure 7. The two vertical plates 301 and the mounting groove 302 together form a high-strength, deformation-resistant U-shaped structure, providing a stable mounting base for clamping the hydraulic cylinder 4. The hollow outer cylinder 401 of the hydraulic cylinder 4 is fixed to the mounting groove 302 with bolts. The clamping gap 303 reserved between the two vertical plates 301 can be directly and quickly engaged with the corresponding part of the thermocouple support structure 7, forming preliminary radial constraint and positioning.

[0057] Among them, a rotatable guide plate 5 is provided on the vertical plate 301. A number of jet holes 501 are evenly distributed on the guide plate 5. An airflow channel 502 is provided on the guide plate 5 and connected to the jet holes 501. The airflow channel 502 is connected to an air supply component. The jet angle can be controlled by adjusting the rotation angle of the guide plates 5 on the two vertical plates 301.

[0058] Specifically, such as Figure 7 and Figure 8 As shown, a drive motor 11 is fixedly installed on the outer side of the vertical plate 301. A sealed housing is provided outside the drive motor 11. One end of its drive shaft 14 extends outward and is connected to the guide plate 5. An air storage ring 15 is fixedly installed on the drive housing. A transition ring 16, which can rotate synchronously with the airflow channel 502, is connected to the airflow channel 502. The transition ring 16 and the air storage ring 15 are rotatably connected, and their internal cavities are interconnected. The air storage ring 15 is connected to the air supply assembly via an air pipe. After the air supply assembly blows high-pressure gas into the air storage cavity through the air pipe, the gas is transferred from the transition ring 16 into the airflow channel 502 and discharged outward through the jet hole 501.

[0059] The airflow channel 502 is equipped with a one-way closing plate 504. After the guide plate 5 is submerged in water along with the entire device, the one-way closing plate 504 can isolate and seal the airflow channel 502 under the impact of water pressure, preventing a large amount of water from flowing into the airflow channel and realizing one-way exhaust.

[0060] Specifically, such as Figure 8As shown, the one-way closing plate 504 has a crescent-shaped cross section, including an outer convex surface 505 and an inner concave surface 506. The outer convex surface 505 is installed facing the jet hole 501. At the same time, an air passage 9 is connected between the inner cavity of the airflow channel 502 and the transition ring 16. The air passage 9 is located at a position lower than the center of the airflow channel 502. A guide rod 17 is provided on the outer convex surface 505 of the one-way closing plate 504. The end of the guide rod 17 extends into the jet hole 501. A limit rod 10 is also provided on the outer convex surface 505 to prevent the outer convex surface 505 from directly contacting the inner wall of the airflow channel 502.

[0061] In other embodiments, the guide rod 17 may also be replaced by a spring, such as Figure 7 As shown, the spring force itself can control the up and down movement of the one-way closing plate 504, and also has a buffering effect.

[0062] When the locking device sinks into the water, water flows from the jet hole 501 into the airflow channel 502 under water pressure, pushing the one-way closing plate 504 to move downward, thereby blocking the air passage 9 and preventing external water from entering the inner cavity of the transition ring 16. When the operator blows air into the airflow channel 502 through the air supply component, the high-pressure airflow flows into the inner cavity of the transition ring 16 through the air storage ring 15, and then enters the airflow channel 502 through the transition air channel 9. This pushes the entire one-way closed plate 504 upward, allowing the lower cavity of the airflow channel 502 to connect with the upper cavity. The airflow can then be discharged from the jet hole 501, simultaneously expelling some of the water that has entered. After the airflow from the airflow channel 502 is ejected through the jet hole 501, it generates a reaction force that acts on the locking device, causing the locking device to move in the opposite direction to the jet direction of the jet hole 501. This achieves rapid displacement of the locking device. In areas with deeper water, this makes it easier for the operator to control the movement of the locking device, reduces the torque on the extension rod 1 when moving the locking device, and improves work efficiency.

[0063] By controlling the rotation angle of the two guide plates 5, the spray angle of the jet nozzle 501 can be adjusted. This allows the reaction force generated by the gas ejected from the jet nozzle 501 to propel the entire locking device underwater. This assists the operator in better controlling the position of the locking device at the bottom of the extension rod 1, and more quickly and accurately locating the engagement point of the bottom thermocouple support structure 7, thus improving work efficiency. Simultaneously, by adjusting different angles of the guide plates 5, the locking device can be controlled to move in multiple directions. Furthermore, due to the different jet angles of the guide plates 5, the water resistance encountered during the movement of the locking device through the reaction force also varies. Therefore, under constant air pressure provided by the air supply component, different jet angles of the guide plates 5 can alter the movement speed of the entire locking device.

[0064] In this embodiment, the guide plate 5 has several guide grooves 503 on both sides. This can effectively reduce the overall weight of the guide plate 5, and at a specific angle, it can guide the water flow and reduce the resistance of the water flow to the guide plate 5.

[0065] Working Principle: During operation, the operator uses extension rod 1 to submerge the locking device in the water and lowers it above the mounting bracket of thermocouple 12. Using an underwater camera, the operator locates the specific position of the thermocouple support structure 7. After the underwater camera confirms that the clamping gap 303 at the end of the positioning clamp 3 is aligned with the thermocouple 12, the locking device is further submerged. Then, the guide plate 5 is rotated, causing the jet nozzle 501 to face away from the thermocouple support structure 7. The jet nozzles 501 on the two guide plates 5 are symmetrical, one tilting upwards and the other downwards. Gas is introduced through the air supply assembly and ejected from the jet nozzle 501. The reaction force generated by the ejected gas causes the locking device to gradually move towards the thermocouple support structure 7. During this movement, the extension rod 1 assists in the movement until the clamping gap 303 of the positioning clamp 3 engages with the thermocouple support structure 7. The specific engagement is as follows: Figure 2 As shown, at this time, the single-acting manual pump pressurizes the clamping hydraulic cylinder 4, pushing the hollow plunger 402 down, so that the abutment 18 at the end of the hollow plunger 402 abuts against the upper surface of the thermocouple support structure 7. With the clamping of the positioning clamping member 3, the entire device is stably fixed on the thermocouple support structure 7.

[0066] like Figure 2 and Figure 3 As shown, after the locking device is engaged with the thermocouple support structure 7, the locking hydraulic cylinder 2 is slowly pressurized downward by controlling the double-acting manual pump, pushing the piston rod 202 and the extension section to slide downward, so that the punch head 2041 at the end of the clamping tube 204 descends with the clamping tube 204 to near the upper surface of the thermocouple support structure 7. At this time, if the floating hexagonal guide head 206 located in the clamping tube 204 is aligned with the hexagonal recessed hole on the locking bolt 13, the floating hexagonal guide head 206 can be directly connected to the locking bolt 13. If the two are not aligned, the floating hexagonal guide head 206 can be rotated by controlling the extension rod 1 to rotate. After the position is adjusted during the rotation, it is then engaged in the hexagonal recessed hole of the locking bolt 13. The extension rod 1 is rotated continuously, and the torque of the torque wrench 8 is monitored in real time until the predetermined value is reached, and the re-locking of the locking bolt 13 is completed. Afterwards, by observing through an underwater camera that the punching claw on the punching head 2041 is aligned with the corresponding point on the locking bolt 13, the locking hydraulic cylinder 2 is controlled to press down, so that the punching head 2041 at the end of the clamping tube 204 squeezes the locking cup 19 and deforms it inward, thereby making it fit against the surface of the locking bolt 13, thus further preventing the locking bolt 13 from loosening.

[0067] After completing the above operations, depressurize the locking hydraulic cylinder 2 and clamping hydraulic cylinder 4, while simultaneously pressurizing the locking hydraulic cylinder 2 in the opposite direction, allowing the floating hexagonal head to retract upwards with the clamping tube 204 and disengage from the hexagonal recessed hole of the locking bolt 13. Then, control the guide plate 5 to rotate to the opposite position, changing the orientation of the jet nozzle 501. Under the reaction thrust, the locking device disengages from the thermocouple support structure 7. Finally, the locking device is lifted upwards and removed from the water body via the extension rod 1, completing the re-locking operation of the entire thermocouple support structure 7.

[0068] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment, characterized in that, include: Extension rod (1) is used to send the entire locking device underwater; The locking hydraulic cylinder (2) includes a cylinder barrel (201) connected to the end of the extension rod (1) and a piston rod (202) connected to the cylinder barrel (201). A positioning clamp (3) is disposed below the cylinder (201); The clamping hydraulic cylinder (4) includes a hollow outer cylinder (401) fixed on the positioning clamping member (3) and a hollow plunger (402) disposed in the hollow outer cylinder (401). The piston rod (202) has an extension section (203) at its end, which extends through the hollow plunger (402). The end of the extension section (203) is connected to a clamping tube (204). The clamping tube (204) is hollow inside and is equipped with a compression spring (205). A floating hexagonal guide head (206) is also provided inside the clamping tube (204). The compression spring (205) pushes the floating hexagonal guide head (206) out of the inner cavity of the clamping tube (204). The positioning clamp (3) includes two vertical plates (301). The vertical plate (301) is provided with a rotatable guide plate (5), and a plurality of jet holes (501) are evenly distributed on the guide plate (5). An airflow channel (502) is provided on the guide plate (5) and is connected to the jet holes (501). The airflow channel (502) is connected to an air supply component. The jet angle of the guide plates (5) on the two vertical plates (301) can be controlled by adjusting the rotation angle.

2. The remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment according to claim 1, characterized in that: The lower end of the cylinder (201) is fixedly connected to a guide sleeve (207), and the piston rod (202) and the extension section (203) move within the guide sleeve (207).

3. The remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment according to claim 1, characterized in that: The locking device is equipped with an underwater camera.

4. The remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment according to claim 1, characterized in that: The lower end of the clamping tube (204) is provided with a punching head (2041), and at least two punching claws are provided equidistantly around the end of the punching head (2041). The claw tips of the punching claws are provided with guide angles, and the inclination angle of the guide angles is greater than 10°.

5. A remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment according to claim 2, characterized in that: The extension section (203) and the clamping tube (204) are engaged with each other by a pin (2031), and the guide sleeve (207) is provided with a sliding groove (2071) that engages with the pin (2031).

6. The remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment according to claim 1, characterized in that: The two vertical plates (301) form an installation groove (302) for installing and clamping the hydraulic cylinder (4). A clamping gap (303) is reserved between the lower ends of the two vertical plates (301) for clamping onto the thermocouple (12) support structure (7).

7. The remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment according to claim 1, characterized in that: The guide plate (5) has several guide grooves (503) on both sides.

8. A remote locking device for a thermocouple support structure locking cup in an underwater high-irradiation environment according to claim 1, characterized in that: A one-way closing plate (504) is provided inside the airflow channel (502).

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