Pipe jacking device in high radiation environment
By designing a remote mechanical pipe lifting device, the problem of remote lifting being impossible in high-radioactivity environments was solved, enabling safe and rapid pipe lifting, reducing the risk of personnel injury, and improving work efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CNNC NUCLEAR POWER OPERATION MANAGEMENT CO LTD
- Filing Date
- 2026-04-14
- Publication Date
- 2026-06-16
AI Technical Summary
Existing pipeline lifting devices cannot perform remote lifting in high-radiation environments, resulting in a high risk of personnel injury and preventing them from working in areas subject to nuclear interference.
A pipe lifting device was designed, comprising a lifting structure, a transmission structure, and a braking structure. The device utilizes a remote mechanical structure for lifting and a crank-driven transmission structure to lift the pipe, thus preventing personnel from entering high-radioactivity areas.
It enables safe and rapid pipe lifting in a highly radioactive environment, avoiding personnel injury, improving work efficiency, and saving manpower.
Smart Images
Figure CN122211986A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of pipeline jacking operation devices, specifically relating to a pipeline jacking device in a high-radioactivity environment. Background Technology
[0002] During the construction, maintenance, and decommissioning of nuclear facilities, the installation, repair, or replacement of pipelines is frequently required. Pipeline components in highly radioactive nuclear reactor cores, due to their long-term exposure to high temperature, high pressure, and high radioactivity, are prone to wear and corrosion, necessitating regular inspection and maintenance. This necessitates pipeline jacking operations to facilitate personnel access. Currently, in heavy water reactors, the gap between the feedwater branch pipes of the main heat transfer system and the adjacent fuel channel positioning components narrows due to thermal stress, sometimes even leading to rubbing against each other, which can cause severe pipe damage. To avoid this, physical isolation is required at locations with small gaps, necessitating pipeline jacking to create maintenance space. However, manual on-site jacking inevitably poses a significant risk of injury to personnel, and electronically controlled jacking tools cannot access areas subject to nuclear interference. Summary of the Invention
[0003] The purpose of this invention is to provide a pipeline lifting device for high-radioactivity environments, solving the problem that existing pipeline lifting devices cannot meet the requirements for remote pipeline lifting operations in high-radioactivity environments.
[0004] The technical solution adopted by this invention to solve its technical problem is: a pipe lifting device in a high-radioactivity environment, wherein the device includes: a lifting structure, the upper end of the lifting structure is movably connected to an upper rail groove, the lower end of the lifting structure is movably connected to a lower rail groove, a first transmission structure is slidably installed on the inner side of the lower rail groove, one end of the first transmission structure is connected to the lower part of the lifting structure, an outer sleeve is fixedly connected to one end of the lower rail groove, a second transmission structure is fixedly installed inside the outer sleeve, one end of the second transmission structure is movably connected to the other end of the first transmission structure through a bearing, and the other end of the second transmission structure is connected to a braking structure. The lifting structure is lifted by a crank on the braking structure via the transmission structure.
[0005] The above-mentioned pipeline lifting device in a high-radioactivity environment includes a lifting structure comprising: a first strip plate and a second strip plate arranged in parallel with each other, and a third strip plate and a fourth strip plate arranged in parallel with each other; the two sets of strip plates are arranged to cross each other and are movably installed together by a central rotating shaft that passes through the intersection of the two sets of strip plates, and a central washer is also provided on the inner side of the intersection of the two sets of strip plates.
[0006] In the aforementioned pipeline lifting device for a high-radioactivity environment, the upper ends of the first and second strip plates are sequentially connected to the upper rail groove via a long rotating shaft, passing through a small washer, the first strip plate, a large washer, and the second strip plate in sequence. The lower ends of the third and fourth strip plates are sequentially connected to the lower rail groove via a long rotating shaft, passing through a small washer, the third strip plate, a large washer, and the fourth strip plate in sequence.
[0007] In the aforementioned pipeline lifting device for a high-radioactivity environment, rollers are movably mounted at the lower ends of the first and second strip plates via short rotating shafts, and the rollers between the first and second strip plates are rotatably arranged in the lower rail groove; rollers are also movably mounted at the upper ends between the third and fourth strip plates via short rotating shafts, and the rollers between the third and fourth strip plates are rotatably arranged in the upper rail groove.
[0008] The above-mentioned pipeline lifting device in a high-radioactivity environment, wherein the first transmission structure includes: a slider that is movably connected to the first transmission structure on the sliding grooves opened on both sides of the lower rail groove, the slider being fixedly installed on the lower part of both sides of the connecting groove, the connecting groove having sliding grooves opened on both sides of the groove opening, and a sliding shaft being slidably embedded in the sliding groove.
[0009] In the aforementioned pipeline lifting device for a high-radioactivity environment, the sliding shaft is fixedly installed at one end of the transmission plate, and the transmission plate is movably connected to the lower part of the first and second strip plates via a short rotating shaft and a connecting washer.
[0010] The aforementioned pipeline lifting device in a high-radioactivity environment includes a second transmission structure comprising: a spiral sleeve fixedly installed inside an outer sleeve, a lead screw spirally installed inside the spiral sleeve, one end of the lead screw being connected to a transmission rod, the other end of the transmission rod extending out of the outer sleeve and connected to a bearing, and a hexagonal sliding rod fixedly connected to the other end of the lead screw.
[0011] The aforementioned pipeline lifting device in a high-radioactivity environment includes a braking structure comprising a large gear movably mounted inside a gearbox via a large rotating sleeve and a small gear movably mounted inside a gearbox via a small rotating sleeve. The small gear and the large gear are connected by meshing, and a hexagonal sliding hole is provided in the middle of the large rotating sleeve.
[0012] In the aforementioned pipeline lifting device for a high-radioactivity environment, one end of the hexagonal slide rod is slidably inserted into a hexagonal sliding hole, and both the small rotating sleeve and the end face of the hexagonal slide rod are provided with brake insertion holes, which are matched and connected to the crank handle.
[0013] In the above-mentioned pipeline lifting device in a high-radioactivity environment, the number of lifting structures is set to two, and a pad is fixedly installed on the upper surface of the upper rail groove.
[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The pipe lifting device provided by the present invention, on the one hand, lifts the pipe through remote mechanical structure control, avoiding the risk of personnel entering the nuclear area to work, and the device structure is not affected by radiation signals. On the other hand, during operation, the pipe can be quickly lifted by rotating the brake socket on the hexagonal slide rod when unloaded, and when loaded, the small rotating sleeve is used to rotate the brake socket to lift the pipe. Finally, it can greatly save the lifting time when unloaded, improve work efficiency, and save manpower. Attached Figure Description
[0015] Figure 1 The figure shown is a schematic diagram of the overall structure of a pipeline lifting device in a high-radioactivity environment according to the present invention. Figure 2 The image shown is a partial view of a pipe lifting device in a high-radioactivity environment according to the present invention. Figure 3 The image shown is a partial cross-sectional view of a pipe lifting device in a high-radioactivity environment according to the present invention. Figure 4 The figure shown is a cross-sectional view of the braking structure of a pipe lifting device in a high-radioactivity environment according to the present invention. Figure 5 The diagram shown is a schematic diagram of the lifting structure of a pipeline lifting device in a high-radioactivity environment according to the present invention.
[0016] Attached diagram descriptions: 1. Lifting structure; 11. First strip plate; 12. Second strip plate; 13. Third strip plate; 14. Fourth strip plate; 15. Central pivot shaft; 16. Central washer; 17. Long pivot shaft; 18. Large washer; 19. Small washer; 110. Roller; 111. Short pivot shaft; 112. Connecting washer; 2. Lower rail groove; 21. Limiting slide groove; 3. Upper rail groove; 4. Pad block; 5. First transmission structure; 51. Transmission. 52. Plate; 53. Sliding shaft; 54. Connecting groove; 55. Sliding groove; 56. Sliding block; 7. Bearing; 8. Outer sleeve; 97. No. 2 transmission structure; 88. Lead screw; 89. Hexagonal sliding rod; 80. Spiral sleeve; 81. Transmission rod; 92. Braking structure; 93. Gearbox; 94. Large gear; 95. Large rotating sleeve; 96. Hexagonal sliding hole; 97. Small gear; 98. Small rotating sleeve; 99. Brake socket; 10. Handle. Detailed Implementation
[0017] To address the problem that existing pipeline lifting devices cannot meet the requirements for remote pipeline lifting operations in high-radioactivity environments, this invention provides a pipeline lifting device for high-radioactivity environments. For example... Figures 1-3As shown, the device includes: a lifting structure 1, the upper end of which is movably connected to an upper rail groove 3, and the lower end of which is movably connected to a lower rail groove 2. A first transmission structure 5 is slidably installed on the inner side of the lower rail groove 2. One end of the first transmission structure 5 is connected to the lower part of the lifting structure 1. An outer sleeve 7 is fixedly connected to one end of the lower rail groove 2. A second transmission structure 8 is fixedly installed inside the outer sleeve 7. One end of the second transmission structure 8 is movably connected to the other end of the first transmission structure 5 via a bearing 6. The other end of the second transmission structure 8 is connected to a braking structure 9. The lifting structure 1 is lifted by a crank 10 on the braking structure 9 via the transmission structure. The number of lifting structures 1 is set to two. A pad 4 is fixedly installed on the upper surface of the upper rail groove 3.
[0018] The lifting structure 1 includes: a first strip 11 and a second strip 12 arranged in parallel with each other, and a third strip 13 and a fourth strip 14 arranged in parallel with each other. The two sets of strips are arranged to cross each other and are movably installed together by a central pivot 15 that passes through the intersection of the two sets of strips. A central washer 16 is also provided on the inner side of the intersection of the two sets of strips. The first strip 11 is inserted between the third strip 13 and the fourth strip 14, and the third strip 13 is arranged between the first strip 11 and the second strip 12. A central washer 16 is provided in the middle of the adjacent surfaces of the first strip 11 and the third strip 13.
[0019] The upper ends of the first strip 11 and the second strip 12 are connected to the upper rail groove 3 by the long rotating shaft 17, which passes through the small washer 19, the first strip 11, the large washer 18 and the second strip 12 in sequence. The lower ends of the third strip 13 and the fourth strip 14 are connected to the lower rail groove 2 by the long rotating shaft 17, which passes through the small washer 19, the third strip 13, the large washer 18 and the fourth strip 14 in sequence.
[0020] Rollers 110 are movably mounted on the lower ends of strip 11 and strip 12 via short rotating shafts 111. The rollers 110 between strip 11 and strip 12 are rolled within the lower rail groove 2. Similarly, rollers 110 are movably mounted on the upper ends of strip 3 and strip 14 via short rotating shafts 111. The rollers 110 between strip 3 and strip 14 are rolled within the upper rail groove 3. During lifting operations, the rollers 110 in the lower and upper rail grooves are supported and moved within the upper and lower rail grooves 2 and 3, respectively.
[0021] Both sides of the lower rail groove 2 are provided with limiting grooves 21. The first transmission structure 5 includes: a slider 55 movably connected to the sliding grooves 21 on both sides of the lower rail groove 2; the slider 55 is fixedly installed on the lower part of both sides of the connecting groove 53; the connecting groove 53 is provided with sliding grooves 54 on both sides near the groove opening; the two ends of the sliding shaft 52 are slidably embedded in the sliding grooves 54 on both sides. A connecting washer 112 is movably installed between the first strip 11 and the second strip 12 near the roller 110 via a short rotating shaft 111. A sliding shaft 52 is fixedly installed on the surface of the transmission plate 51 near one end; the transmission plate 51 is movably connected to the lower part of the first strip 11 and the second strip 12 via the short rotating shaft 111 and the connecting washer 112.
[0022] The second transmission structure 8 includes: a spiral sleeve 83 fixedly installed inside the outer sleeve 7; a lead screw 81 is spirally installed inside the spiral sleeve 83; one end of the lead screw 81 is connected to a transmission rod 84; the other end of the transmission rod 84 extends out of the outer sleeve 7 and is connected to a bearing 6; the transmission rod 84 of the second transmission structure 8 is movably connected to the connecting groove 53 through the bearing 6; and a hexagonal slide rod 82 is fixedly connected to the other end of the lead screw 81.
[0023] The braking structure 9 includes a large gear 92 movably mounted inside the gearbox 91 via a large rotating sleeve 93 and a small gear 95 movably mounted inside the gearbox 91 via a small rotating sleeve 96. The small gear 95 and the large gear 92 are connected by meshing. A hexagonal sliding hole 94 is provided in the middle of the large rotating sleeve 93, and one end of a hexagonal sliding rod 82 is slidably inserted into the hexagonal sliding hole 94. The cross-section of the hexagonal sliding rod 82 matches the cross-section of the hexagonal sliding hole 94. Brake insertion holes 97 are provided on the end faces of both the small rotating sleeve 96 and the hexagonal sliding rod 82, and the brake insertion holes 97 are matched and connected to the crank handle 10.
[0024] The small gear 95 drives the large gear 92 to rotate based on the torque principle and mechanical benefit principle in gear transmission. When the small gear 95 drives the large gear 92 to rotate, through the balance of torque and the effect of mechanical benefit, a smaller force is required on the large gear 92 to achieve rotation, thus achieving the effect of saving effort.
[0025] When using the pipe lifting tool described in this invention, first place the pad 4 of the pipe lifting tool below the pipe lifting point. Then, the operator can manually insert the crank 10 into the brake socket 97 of the hexagonal slide bar 82 and crank it. At this time, the lead screw 81 at the end of the hexagonal slide bar 82 begins to rotate in the spiral sleeve 83. This drives the transmission rod 84 to rotate, causing the transmission rod 84 to push forward. The rotation is converted into sliding through the bearing 6, so that the connecting groove 53 slides forward under the action of the slider 55 and the limiting slide groove 21, thereby pushing the transmission plate 51. The transmission plate 51 then transmits the force to the lifting structure 1. At this time, the lifting structure 1 quickly lifts the upper rail groove 3 upward, and the upper rail groove 3 then lifts the pad 4 upward. When the upper surface of the pad 4 is about to contact the bottom surface of the pipe, the crank 10 is switched to the brake socket 97 of the small rotating sleeve 96 and rotated. At this time, the load lifting can be carried out through the labor-saving mechanism, thereby easily and quickly lifting the pipe and improving work efficiency.
[0026] It should be noted that the combination of the technical features in the embodiments of the present invention is not limited to the combination methods described in the embodiments of the present invention or the combination methods described in the specific embodiments. All technical features described in the present invention can be freely combined or combined in any way, unless there is a contradiction between them.
[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A pipe lifting device for use in high-radioactivity environments, characterized in that, The device includes: a lifting structure (1), the upper end of the lifting structure (1) is movably connected to the upper rail groove (3), the lower end of the lifting structure (1) is movably connected to the lower rail groove (2), a first transmission structure (5) is slidably installed on the inner side of the lower rail groove (2), one end of the first transmission structure (5) is connected to the lower part of the lifting structure (1), one end of the lower rail groove (2) is fixedly connected to an outer sleeve (7), a second transmission structure (8) is fixedly installed inside the outer sleeve (7), one end of the second transmission structure (8) is movably connected to the other end of the first transmission structure (5) through a bearing (6), and the other end of the second transmission structure (8) is connected to a braking structure (9). The lifting structure (1) is lifted by the crank (10) on the braking structure (9) through the transmission structure.
2. The pipe lifting device in a high-radioactivity environment according to claim 1, characterized in that, The lifting structure (1) includes: a first strip plate (11) and a second strip plate (12) arranged in parallel with each other, and a third strip plate (13) and a fourth strip plate (14) arranged in parallel with each other; the two sets of strip plates are arranged in a cross manner and are movably installed together by a central pivot (15) that passes through the intersection of the two sets of strip plates, and a central washer (16) is also provided on the inner side of the intersection of the two sets of strip plates.
3. The pipe jacking device in a high-radioactivity environment according to claim 2, characterized in that, The upper ends of the first strip (11) and the second strip (12) are connected to the upper rail groove (3) by the long rotating shaft (17) through the small washer (19), the first strip (11), the large washer (18) and the second strip (12) in sequence. The lower ends of the third strip (13) and the fourth strip (14) are connected to the lower rail groove (2) by the long rotating shaft (17) through the small washer (19), the third strip (13), the large washer (18) and the fourth strip (14) in sequence.
4. A pipe lifting device for a high-radioactivity environment according to claim 2 or 3, characterized in that, Rollers (110) are movably mounted on the lower ends of the first strip (11) and the second strip (12) via short rotating shafts (111). The rollers (110) between the first strip (11) and the second strip (12) are rolled in the lower rail groove (2). Rollers (110) are also movably mounted on the upper ends of the third strip (13) and the fourth strip (14) via short rotating shafts (111). The rollers (110) between the third strip (13) and the fourth strip (14) are rolled in the upper rail groove (3).
5. A pipe jacking device for a high-radioactivity environment according to claim 2, characterized in that, The first transmission structure (5) includes: a slider (55) movably connected to the first transmission structure (5) on the sliding groove (21) opened on both sides of the lower rail groove (2), the slider (55) is fixedly installed on the lower part of both sides of the connecting groove (53), the connecting groove (53) is provided with sliding grooves (54) on both sides of the groove opening, and a sliding shaft (52) is slidably embedded in the sliding groove (54).
6. A pipe lifting device for a high-radioactivity environment according to claim 5, characterized in that, The sliding shaft (52) is fixedly installed at one end of the transmission plate (51), and the transmission plate (51) is movably connected to the lower part of the first strip (11) and the second strip (12) through the short rotating shaft (111) and the connecting washer (112).
7. A pipe jacking device for a high-radioactivity environment according to claim 1, characterized in that, The second transmission structure (8) includes: a spiral sleeve (83) fixedly installed inside the outer sleeve (7), a lead screw (81) is spirally installed inside the spiral sleeve (83), one end of the lead screw (81) is connected to a transmission rod (84), the other end of the transmission rod (84) extends out of the outer sleeve (7) and is connected to a bearing (6), and the other end of the lead screw (81) is fixedly connected to a hexagonal slide rod (82).
8. A pipe jacking device for a high-radioactivity environment according to claim 1, characterized in that, The braking structure (9) includes a large gear (92) that is movably installed inside the gearbox (91) via a large rotating sleeve (93) and a small gear (95) that is movably installed inside the gearbox (91) via a small rotating sleeve (96). The small gear (95) and the large gear (92) are connected by meshing. A hexagonal sliding hole (94) is provided in the middle of the large rotating sleeve (93).
9. A pipe jacking device for a high-radioactivity environment according to claims 7 and 8, characterized in that, One end of the hexagonal slide rod (82) is slidably inserted into the hexagonal slide hole (94). Both the small rotating sleeve (96) and the end face of the hexagonal slide rod (82) are provided with brake insertion holes (97), and the brake insertion holes (97) are matched and connected with the crank handle (10).
10. A pipe jacking device for a high-radioactivity environment according to claim 1, characterized in that, The number of the lifting structure (1) is set to two, and the upper surface of the upper rail groove (3) is fixedly installed with a pad (4).