Manual remote valve rotating tool for spent fuel single-rod transportation container

Abstract

The invention relates to a manual remote valve rotating tool for a spent fuel single-rod transport container, a transmission mechanism is inserted into a ball valve of the spent fuel single-rod transport container, the transmission mechanism comprises a special-shaped positioning block, the ball valve is provided with a special-shaped recess matched with the special-shaped positioning block, and the special-shaped positioning block is clamped in the special-shaped recess; the positioning assembly is arranged on the outer side of the transmission mechanism in a sleeving mode and is in a hollow cylinder shape, the inner diameter of the positioning assembly is matched with the transmission mechanism, the outer diameter of the positioning assembly is matched with the hole, and the transmission mechanism and the positioning assembly can rotate relatively; the traction assembly is connected with the transmission mechanism, installed at the end away from the ball valve and comprises a traction handle and a steel wire rope, the steel wire rope is connected with the transmission mechanism, the traction handle is connected with the steel wire rope, and the traction handle pulls the steel wire rope to drive the special-shaped positioning block and the ball valve to rotate. The angle deviation when the rotary valve tool enters is reduced, the ball valve is opened or closed more accurately, the ball valve is opened or closed manually and remotely, and the safety and reliability of the rotary valve tool are improved.

Description

Technical Field

[0001] This invention relates to the field of radioactive material transport container technology, and more particularly to a manual remote valve tool for a spent fuel single rod transport container. Background Technology

[0002] The rapid development of the global nuclear power industry has driven the growth of the spent fuel transport container market. As nuclear power capacity continues to increase, the amount of spent fuel produced also increases, leading to a growing demand for spent fuel transport containers. Simultaneously, the development of spent fuel reprocessing technologies has also fueled the growth of the spent fuel transport container market. Reprocessing technologies can recover and reuse useful elements from spent fuel, thereby reducing environmental pollution, which promotes the application of spent fuel transport containers in the spent fuel reprocessing process.

[0003] Currently, all spent fuel single-rod transport containers (such as the French NCS45 transport container) both domestically and internationally use ball valve designs. Due to certain errors in the processing and assembly of the ball valve components, the ball valve shaft inevitably experiences angular and positional offsets relative to the container body. Typically, the ball valve rotates at a theoretical angle (e.g., 90°) under the drive of a valve-turning tool. If the offset is large, it will lead to incomplete opening and closing, affecting the normal entry and exit of the basket from the container. If the ball valve shaft deviates significantly from the output shaft of the valve-turning tool, it will be difficult to rotate the ball valve in a vertical container position, making precise opening and closing impossible. Since the loading process of the container in nuclear power plants is carried out remotely underwater, it usually uses a motor servo drive. However, in the underwater radiation environment of nuclear power plants, if the servo motor experiences leakage, its safety and reliability will be low, making it difficult to cope with the underwater loading environment.

[0004] The above problems urgently need to be addressed. Summary of the Invention

[0005] This invention discloses a manual remote valve tool for a spent fuel single-bar transport container, which aims to solve the technical problems existing in the prior art.

[0006] The present invention adopts the following technical solution, comprising: a transmission mechanism, inserted into a ball valve of a spent fuel single-barrel transport container; the transmission mechanism includes a shaped positioning block; the spent fuel single-barrel transport container has an inwardly recessed hole; the ball valve is embedded in the hole; the ball valve in the hole has a shaped recess that matches the shaped positioning block; the shaped structure of the shaped positioning block is engaged in the shaped recess; a positioning component, sleeved on the outside of the transmission mechanism, is a hollow cylinder; the inner diameter of the positioning component matches the transmission mechanism; the outer diameter of the positioning component matches the hole; the transmission mechanism and the positioning component are rotatable relative to each other; the positioning component is used to drive the transmission mechanism to insert into the spent fuel single-barrel transport container; and a traction component, connected to the transmission mechanism and installed at the end of the transmission mechanism away from the ball valve; the traction component includes a traction handle and a steel wire rope; the steel wire rope is connected to the transmission mechanism; the traction handle is connected to the steel wire rope; the traction handle is used to pull the steel wire rope to drive the shaped positioning block and the ball valve to rotate.

[0007] Optionally, the transmission mechanism further includes: a drive shaft connected to the irregularly shaped positioning block, the length of the drive shaft being greater than the length from the irregularly shaped positioning block to the outer edge of the hole, the outer diameter of the drive shaft matching the inner diameter of the positioning component, the drive shaft being rotatable within the positioning component, and lubricating fluid placed between the drive shaft and the positioning component.

[0008] Optionally, the transmission mechanism further includes: a torque rod, which is cylindrical in shape, with its middle position connected to the end of the drive shaft away from the irregular positioning block, and the two ends of the torque rod connected to the steel wire rope, so that pulling the steel wire rope drives the torque rod, the drive shaft and the irregular positioning block to rotate.

[0009] Optionally, the positioning component includes: a positioning flange, comprising a front end and a rear end, wherein the front end is a hollow cylindrical structure, the inner diameter of the front hollow cylinder is equal to the diameter of the drive shaft, and the outer diameter of the front hollow cylinder is equal to the diameter of the hole; the rear end is also a hollow cylindrical structure, the inner diameter of the rear hollow cylinder is equal to the diameter of the drive shaft, and the outer diameter of the rear hollow cylinder is larger than the diameter of the hole; the rear end is disposed outside the hole; and a sealing ring is disposed at the rear end of the positioning flange and located on the circular surface of the rear end near the hole.

[0010] Optionally, the positioning assembly further includes: a bearing housing, installed at the rear end of the positioning flange, the bearing housing having a hollow cylindrical structure, the bearing housing being sleeved on the outer ring of the drive shaft; and a rolling bearing, installed between the bearing housing and the drive shaft.

[0011] Optionally, the positioning assembly further includes: a positioning pin disposed at the rear end of the positioning flange and extending toward the side away from the hole; a plurality of pin holes are provided at the outermost circumference of the rear end, and the positioning pin is inserted into the pin holes to position the angle of rotation of the torque rod.

[0012] Optionally, the positioning assembly further includes: a mounting handle disposed at the rear end of the positioning flange and located on the side of the rear end away from the hole, the mounting handle having an arc-shaped structure, the outermost two ends of the arc-shaped structure being mounted on the outer side of the outer diameter of the bearing housing.

[0013] Optionally, the traction assembly further includes: two bow-shaped shackles, respectively installed at both ends of the torque rod, and loop-shaped buckles at both ends of the wire rope, wherein the bow-shaped shackles can open the loops passing through the wire rope; and a spring buckle, installed between the wire rope and the traction handle, wherein the spring buckle can open the loops passing through the wire rope.

[0014] Optionally, the traction assembly further includes a hand-cranked reel disposed between the bow-shaped shackle and the spring buckle, wherein the wire rope is wound on the hand-cranked reel for adjusting the length of the wire rope.

[0015] The technical solution adopted in this invention can achieve at least one of the following beneficial effects: In this embodiment of the invention, by employing a shaped positioning block that engages with a shaped recess on the ball valve, rotating the shaped positioning block rotates the ball valve, thereby opening the ball valve on the spent fuel single-barrel transport container. Setting the outer diameter of the positioning component to be the same as the diameter of the hole ensures that the angular offset of the valve-turning tool upon entry is zero, making it easier to align and open the ball valve. By using a traction tool and a steel wire rope to extend the operating length of the valve-turning tool, after the spent fuel single-barrel transport container is placed in water, the shaped positioning block is rotated by pulling the steel wire rope, thus remotely rotating the ball valve. Furthermore, the manual valve-turning method avoids electrical leakage, improving safety and reliability. This invention achieves the technical effect of reducing the angular deviation of the valve-turning tool upon entry, making it easier to accurately open or close the ball valve, and also improving the safety and reliability of the valve-turning tool through manual remote opening or closing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 This is a container structure diagram of a manual remote control valve tool for a spent fuel single-bar transport container according to the present invention; Figure 2 This is a side view cross-sectional view of a manual remote control valve tool for a spent fuel single-bar transport container according to the present invention; Figure 3 This is a structural diagram of the irregularly shaped positioning block of a manual remote rotary valve tool for a spent fuel single-bar transport container according to the present invention; Figure 4 This is an overall structural diagram of a manual remote control valve tool for a spent fuel single-bar transport container according to the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Transmission mechanism; 11. Irregularly shaped positioning block; 12. Drive shaft; 13. Torque rod; 2. Positioning assembly; 21. Positioning flange; 22. Sealing ring; 23. Bearing housing; 24. Rolling bearing; 25. Mounting handle; 26. Positioning pin; 3. Traction assembly; 31. Bow-shaped shackle; 32. Wire rope; 33. Spring buckle; 34. Traction handle; 35. Hand-cranked cable reel; 4. Spent fuel single rod transport container; 41. Hole. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0020] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] First, to facilitate understanding of the embodiments of the present invention, some terms or nouns involved in the present invention will be explained below: The spent fuel single rod transport container is a special equipment used for the transfer of single spent fuel rods within a nuclear power plant. It is a key safety device in the nuclear fuel cycle and is mainly used to transfer single spent fuel rods unloaded from the reactor core area to the radioactive hot cell or storage area.

[0022] To address the problems existing in related technologies, this application provides a manual remote valve control tool for a spent fuel single-barrel transport container.

[0023] This embodiment provides a manual remote valve control tool for a spent fuel single-barrel transport container, such as... Figure 1 As shown, Figure 1 This is a structural diagram of a manually operated remote valve tool for a spent fuel single-barrel transport container according to the present invention. The valve tool includes: Transmission mechanism 1 is inserted into the ball valve of the spent fuel single rod transport container 4. Transmission mechanism 1 includes a shaped positioning block 11. The spent fuel single rod transport container 4 has an inwardly recessed hole 41. The ball valve is embedded in the hole 41. The ball valve in the hole 41 has a shaped recess that matches the shaped positioning block 11. The shaped structure of the shaped positioning block 11 is engaged in the shaped recess. Positioning component 2 is sleeved on the outside of transmission mechanism 1. It is a hollow cylinder. The inner diameter of positioning component 2 matches that of transmission mechanism 1. The outer diameter matches the hole 41. The transmission mechanism 1 and the positioning component 2 can rotate relative to each other. The positioning component 2 is used to drive the transmission mechanism 1 to be inserted into the spent fuel single rod transport container 4. The traction component 3 is connected to the transmission mechanism 1 and is installed at the end of the transmission mechanism 1 away from the ball valve. The traction component 3 includes a traction handle 34 and a steel wire rope 32. The steel wire rope 32 is connected to the transmission mechanism 1, and the traction handle 34 is connected to the steel wire rope 32. The traction handle 34 is used to pull the steel wire rope 32 to drive the irregular positioning block 11 and the ball valve to rotate.

[0024] Optional, such as Figure 1 As shown, the manual valve tool is installed in the hole 41 of the spent fuel single rod transport container 4 using the positioning component 2. During nuclear fuel loading, the spent fuel single rod transport container 4 is placed vertically, and the traction component 3 of the manual valve tool is vertically upward and parallel to the spent fuel single rod transport container 4; during hot cell unloading, the spent fuel single rod transport container 4 is placed horizontally, and the traction component 3 of the manual valve tool is horizontally backward and perpendicular to the spent fuel single rod transport container 4.

[0025] Optionally, the irregularly shaped positioning block 11 of the transmission mechanism 1 matches the irregularly shaped recess on the ball valve. When the irregularly shaped positioning block 11 is rotated, the ball valve will rotate along with it, thereby realizing the opening and closing of the ball valve. During the insertion of the transmission mechanism 1 into the hole 41, in order to ensure that the transmission mechanism 1 is inserted in one go and that the transmission mechanism 1 does not wobble in the hole 41, a positioning component 2 needs to be set to fill the gap in the hole 41. That is, when the positioning component 2 is inserted into the hole 41, the diameter of the positioning component 2 is completely matched with the hole 41, and there will be no wobble in the hole 41 that would prevent the irregularly shaped positioning block 11 from being unable to align with the irregularly shaped recess.

[0026] Optionally, the positioning component 2, along with the transmission mechanism 1, is inserted into the hole 41. The irregularly shaped positioning block 11 is at the same horizontal position as the irregularly shaped recess. By rotating the transmission mechanism 1, the irregularly shaped structure of the positioning block 11 can be fully aligned with the irregularly shaped recess before being inserted inward. After the insertion and alignment, the end of the positioning component 2 should be aligned with the outer edge of the hole 41. At this point, the positioning is complete, indicating that the transmission mechanism 1 has been inserted.

[0027] Optionally, the irregularly shaped positioning block 11 can be rotated by pulling the wire rope 32, thereby opening and closing the ball valve. To prevent the wire rope 32 from scratching the palms, a traction handle 34 is provided at the end of the wire rope 32. The operator holds the traction handle 34 to pull the wire rope 32.

[0028] In some preferred embodiments, the transmission mechanism 1 further includes: a drive shaft 12 connected to the irregular positioning block 11, the length of the drive shaft 12 being greater than the length of the irregular positioning block 11 to the outer edge of the hole 41, the outer diameter of the drive shaft 12 matching the inner diameter of the positioning component 2, the drive shaft 12 being rotatable within the positioning component 2, and lubricating fluid placed between the drive shaft 12 and the positioning component 2.

[0029] Optional, such as Figure 2 As shown, Figure 2 This is a side cross-sectional view of a manual remote rotary valve tool for a spent fuel single-bar transport container according to the present invention. The irregularly shaped positioning block 11 is connected to the drive shaft 12 and only serves a driving function without positioning. Positioning requires the positioning component 2. Therefore, the diameter of the drive shaft 12 is smaller than the diameter of the hole 41. The drive shaft 12 is a relatively long horizontal bar. The front end of the drive shaft 12 is connected to the irregularly shaped positioning block 11, and the rear end of the drive shaft 12 is connected to the torque rod 13. The torque rod 13 is rotated, and the driving force is transmitted through the drive shaft 12, thereby rotating the irregularly shaped positioning block 11.

[0030] Optional, such as Figure 3 As shown, Figure 3This is a structural diagram of the irregularly shaped positioning block 11 of a manual remote rotary valve tool for a spent fuel single-bar transport container according to the present invention. The front end of the drive shaft 12 is provided with two fan-shaped structures that match the irregularly shaped positioning block 11. The addition of irregularly shaped structures makes it easier to achieve the rotation of the ball valve when the irregularly shaped positioning block 11 matches the irregularly shaped recess.

[0031] In some preferred embodiments, the transmission mechanism 1 further includes a torque rod 13, which is cylindrical. The middle position of the torque rod 13 is connected to the end of the drive shaft 12 away from the irregular positioning block 11. The two ends of the torque rod 13 are respectively connected to steel wire ropes 32, and the steel wire ropes 32 are pulled to drive the torque rod 13, the drive shaft 12 and the irregular positioning block 11 to rotate.

[0032] Optional, such as Figure 4 As shown, Figure 4 This is an overall structural diagram of a manual remote rotary valve tool for a spent fuel single rod transport container according to the present invention. The torque rod 13 passes through the hole at the end of the drive shaft 12, and the drive shaft 12 is restricted to the middle position of the torque rod 13 by two cotter pins to ensure torque balance on both sides.

[0033] Optionally, the wire rope 32 is installed at both ends of the torque rod 13. By pulling the wire rope 32 clockwise or counterclockwise, the torque rod 13 will rotate, thereby driving the drive shaft 12 to rotate, which in turn drives the irregular positioning block 11 to rotate, ultimately opening or closing the ball valve.

[0034] In some preferred embodiments, the positioning component 2 includes: a positioning flange 21, including a front end and a rear end, the front end being a hollow cylindrical structure, the inner diameter of the front hollow cylinder being equal to the diameter of the drive shaft 12, and the outer diameter of the front hollow cylinder being equal to the diameter of the hole 41; the rear end also being a hollow cylindrical structure, the inner diameter of the rear hollow cylinder being equal to the diameter of the drive shaft 12, and the outer diameter of the rear hollow cylinder being larger than the diameter of the hole 41; the rear end being disposed on the outside of the hole 41; and a sealing ring 22, disposed on the rear end of the positioning flange 21 and located on the circular surface of the rear end near the hole 41.

[0035] Optional, refer to Figure 2 The positioning flange 21 is inserted into the hole 41, with its rear end abutting against the outer edge of the hole 41. After the irregularly shaped positioning block 11 aligns with the irregularly shaped recess, the rear end of the positioning flange 21 is flush with the outer edge of the hole 41. Figure 1 As shown in the figure. The precise positioning of the ball valve rotation is achieved by the cooperation of the positioning flange 21 and the irregular positioning block 11. During installation, the positioning flange 21 is fixed to the hole 41 of the container using long shaft bolts. The inner wall surface of the rear end of the positioning flange 21 is in contact with the outer mounting surface of the hole 41 of the container.

[0036] Optionally, the locating surfaces on both sides of the fan-shaped area of ​​the drive shaft 12 mate with the two locating surfaces at the front end of the locating flange 21 to achieve positioning when the ball valve is opened and closed. During installation, the irregularly shaped locating block 11 is pre-inserted into the irregularly shaped recess of the ball valve, and the gap should be less than 0.1mm to ensure that the rotational error is minimized. The fan-shaped area of ​​the drive shaft 12 is precisely machined multiple times using a fitting method until the open and closed states of the ball valve meet the requirements for loading and unloading, and the basket moves in and out smoothly.

[0037] Optionally, a sealing ring 22 can be provided on the inner wall of the rear end of the positioning flange 21 and the outer mounting surface of the container hole 41. The sealing ring 22 can effectively ensure the sealing effect at the hole 41 and prevent water from entering the hole 41 after drainage.

[0038] In some preferred embodiments, the positioning assembly 2 further includes: a bearing housing 23, which is installed at the rear end of the positioning flange 21. The bearing housing 23 has a hollow cylindrical structure and is sleeved on the outer ring of the drive shaft 12; and a rolling bearing 24, which is installed between the bearing housing 23 and the drive shaft 12.

[0039] Optionally, a rolling bearing 24 is installed in the bearing housing 23. The inner side of the rolling bearing 24 mates with the drive shaft 12 to reduce the rotational torque of the drive shaft 12 and reduce wear.

[0040] In some preferred embodiments, the positioning assembly 2 further includes: a positioning pin 26 disposed at the rear end of the positioning flange 21 and extending toward the side away from the hole 41; a plurality of pin holes are provided at the outermost circumference of the rear end, and the positioning pin 26 is inserted into the pin holes to position the angle of rotation of the torque rod 13.

[0041] Optionally, the inner wall of the rear end of the positioning flange 21 is fitted with the outer mounting surface of the container hole 41, and the outer wall of the rear end of the positioning flange 21 is fitted with two positioning pins 26. When the torque rod 13 rotates, it will be blocked by the positioning pins 26 after it touches them, and thus cannot rotate further. This indicates that the ball valve has changed from the open state to the closed state, or the ball valve has changed from the closed state to the open state.

[0042] In some preferred embodiments, the positioning component 2 further includes: a mounting handle 25 disposed at the rear end of the positioning flange 21 and located on the side of the rear end away from the hole 41, the mounting handle 25 having an arc-shaped structure, the outermost two ends of the arc-shaped structure being mounted on the outer side of the outer diameter of the bearing seat 23.

[0043] Optionally, the positioning flange 21 is welded with a pair of mounting handles 25 for easy handling and installation.

[0044] In some preferred embodiments, the traction assembly 3 further includes: two bow-shaped shackles 31, respectively installed at both ends of the torque rod 13, and loop-shaped buckles with loop structures at both ends of the wire rope 32, the bow-shaped shackles 31 being able to open the loops passing through the wire rope 32; and a spring buckle 33, installed between the wire rope 32 and the traction handle 34, the spring buckle 33 being able to open the loops passing through the wire rope 32.

[0045] Optionally, the traction assembly 3 transmits traction force remotely through the wire rope 32. The front end of the wire rope 32 is connected to the torque rod 13 by the bow-shaped shackle 31, and the rear end of the wire rope 32 is connected to the traction handle 34 by the spring buckle 33. When the ball valve needs to be opened, the traction handle 34 on one side is slowly pulled until the limit of the positioning pin 26 is reached. Similarly, when the ball valve needs to be closed, the traction handle 34 on the other side is slowly pulled until the reverse limit is reached.

[0046] In some preferred embodiments, the traction assembly 3 further includes a hand-cranked reel 35 disposed between the bow-shaped shackle 31 and the spring buckle 33, with the wire rope 32 wound around the hand-cranked reel 35 for adjusting the length of the wire rope 32.

[0047] Optionally, the steel wire rope 32 can be neatly wound using a hand-cranked reel 35, which makes it easier to control the length of the steel wire rope 32. At the same time, when the valve tool is not in use, the messy steel wire rope 32 can be tidied up for easy storage.

[0048] Based on the above structure, the spent fuel single-rod transport container 4 is placed vertically during nuclear power plant refueling. The valve operation is carried out in the water-filled loading well. The manual valve turning tool traction assembly 3 is vertically upward, and pulling the traction handle 34 remotely switches the ball valve. When the container is transported to the hot chamber for unloading, it is placed horizontally, and the manual valve turning tool traction assembly 3 is horizontally backward. Personnel stand behind the shield and pull the traction handle 34 to remotely switch the ball valve. During the installation of the manual valve turning tool, the irregularly shaped positioning block 11 is pre-inserted into the irregularly shaped recess of the ball valve, and the irregularly shaped positioning block 11 and the ball valve rotate simultaneously in close cooperation. The two positioning surfaces on both sides of the fan-shaped area of ​​the drive shaft 12 are precisely machined multiple times using a fitting method until the ball valve's open and closed states meet the refueling and unloading requirements. This aligns with the two positioning surfaces at the front end of the positioning flange 21, ensuring that the ball valve can open and close fully in both vertical and horizontal states, allowing the basket to smoothly enter and exit the container without any risk of jamming.

[0049] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A spent fuel single rod transport container manual remote valve turning tool characterized by, include: The transmission mechanism (1) is inserted into the ball valve of the spent fuel single rod transport container (4). The transmission mechanism (1) includes a shaped positioning block (11). The spent fuel single rod transport container (4) is provided with an inwardly recessed hole (41). The ball valve is embedded in the hole (41). The ball valve in the hole (41) is provided with a shaped recess that matches the shaped positioning block (11). The shaped structure of the shaped positioning block (11) is engaged in the shaped recess. The positioning component (2) is sleeved on the outside of the transmission mechanism (1) and is in the shape of a hollow cylinder. The inner diameter of the positioning component (2) matches the transmission mechanism (1), and the outer diameter of the positioning component (2) matches the hole (41). The transmission mechanism (1) and the positioning component (2) can rotate relative to each other. The positioning component (2) is used to drive the transmission mechanism (1) to be inserted into the spent fuel single rod transport container (4). The traction assembly (3) is connected to the transmission mechanism (1) and installed at the end of the transmission mechanism (1) away from the ball valve. The traction assembly (3) includes a traction handle (34) and a steel wire rope (32). The steel wire rope (32) is connected to the transmission mechanism (1), and the traction handle (34) is connected to the steel wire rope (32). The traction handle (34) is used to pull the steel wire rope (32) to drive the irregular positioning block (11) and the ball valve to rotate.

2. The manual remote valve tool for a spent fuel single rod transport container of claim 1, wherein, The transmission mechanism (1) further includes: A drive shaft (12) is connected to the irregular positioning block (11). The length of the drive shaft (12) is greater than the length from the irregular positioning block (11) to the outer edge of the hole (41). The outer diameter of the drive shaft (12) matches the inner diameter of the positioning component (2). The drive shaft (12) can rotate within the positioning component (2). Lubricating fluid is placed between the drive shaft (12) and the positioning component (2).

3. The manual remote valve tool for a spent fuel single rod transport container of claim 2, wherein, The transmission mechanism (1) further includes: The torque rod (13) is cylindrical. The middle position of the torque rod (13) is connected to the end of the drive shaft (12) away from the irregular positioning block (11). The two ends of the torque rod (13) are respectively connected to the wire rope (32). Pulling the wire rope (32) will drive the torque rod (13), the drive shaft (12) and the irregular positioning block (11) to rotate.

4. The manual remote valve turning tool for a spent fuel single rod transport container of claim 3, wherein, The positioning component (2) includes: The positioning flange (21) includes a front end and a rear end. The front end is a hollow cylindrical structure. The inner diameter of the hollow cylinder at the front end is equal to the diameter of the drive shaft (12). The outer diameter of the hollow cylinder at the front end is equal to the diameter of the hole (41). The rear end is also a hollow cylindrical structure. The inner diameter of the hollow cylinder at the rear end is equal to the diameter of the drive shaft (12). The outer diameter of the hollow cylinder at the rear end is greater than the diameter of the hole (41). The rear end is located outside the hole (41). A sealing ring (22) is disposed at the rear end of the positioning flange (21) and located on the circular surface of the rear end near the hole (41).

5. The manual remote valve tool for a spent fuel single rod transport container of claim 4, wherein, The positioning component (2) further includes: The bearing housing (23) is installed at the rear end of the positioning flange (21). The bearing housing (23) has a hollow cylindrical structure and is sleeved on the outer ring of the drive shaft (12). A rolling bearing (24) is installed between the bearing housing (23) and the drive shaft (12).

6. The manual remote valve tool for a spent fuel single rod transport canister according to claim 4, wherein, The positioning component (2) further includes: A locating pin (26) is provided at the rear end of the locating flange (21) and extends toward the side away from the hole (41); Multiple pin holes are provided at the outermost circumference of the rear end, and the positioning pin (26) is inserted into the pin hole to position the angle of rotation of the torque rod (13).

7. The manual remote valve tool for a spent fuel single rod transport canister according to claim 5, wherein, The positioning component (2) further includes: The mounting handle (25) is located at the rear end of the positioning flange (21) and on the side of the rear end away from the hole (41). The mounting handle (25) has an arc-shaped structure, and the outermost two ends of the arc-shaped structure are installed on the outer side of the outer diameter of the bearing seat (23).

8. The manual remote valve tool for a spent fuel single rod transport canister according to claim 3, wherein, The traction assembly (3) also includes: Two bow-shaped shackles (31) are respectively installed at both ends of the torque rod (13), and both ends of the wire rope (32) are provided with ring-shaped buckles. The bow-shaped shackles (31) can open the rings passing through the wire rope (32). A spring buckle (33) is installed between the wire rope (32) and the traction handle (34). The spring buckle (33) can open the loop that passes through the wire rope (32).

9. A manual remote control valve tool for a spent fuel single-barrel transport container according to claim 8, characterized in that, The traction assembly (3) also includes: A hand-cranked reel (35) is positioned between the bow-shaped shackle (31) and the spring buckle (33). The wire rope (32) is wound around the hand-cranked reel (35) to adjust the length of the wire rope (32).

Images