High-energy pipeline constant-load whipping limiting device for nuclear power

Abstract

The invention belongs to the field of nuclear power safety and electromechanics, and discloses a nuclear power high-energy pipeline fixed-load whip limiting device which comprises a left pin head, a left end cover, a cylinder barrel, a limiting bush, an energy consumption pipe, a drawing rod, a right end cover and a right pin head. Through the drawing process of the drawing rod on the inner wall of the energy consumption pipe, basically stable resistance is formed on the high-energy pipeline, throwing energy of the high-energy pipeline is absorbed and consumed, and reliable operation of nuclear power main equipment is effectively guaranteed. The throwing distance of the high-energy pipeline can be effectively shortened, the throwing resistance peak value of the high-energy pipeline is reduced, meanwhile, the performance detection requirement of the constant-load throwing limiting device is greatly lowered, the product structure is simple, the product performance and quality are fully guaranteed, and wide application prospects are achieved.

Description

Technical Field

[0001] The present invention relates to a high-energy pipeline whipping limit device, belonging to the fields of nuclear power safety and mechanical and electrical engineering, and specifically to a fixed-load whipping limit device for high-energy pipelines used in nuclear power plants. Background Art

[0002] High-energy pipelines are important devices for transporting media in power plants. During the process of high-energy media being transported through pipelines, on the one hand, due to reasons such as the uneven flow velocity of high-energy media and the friction between the media and the pipeline wall, micro-vibrations continuously occur in the high-energy pipelines during operation. Such micro-vibrations can cause fatigue damage to the high-energy pipelines, especially at the welded joints of high-energy pipelines, such as the welded joints between pipelines and elbows and between pipelines and tees, which are more prone to fatigue cracking or fracture. On the other hand, during the start-up and stop processes of high-energy media transportation, fluid impacts are likely to form in the transportation pipelines, forming steam hammers and water hammer impacts, further damaging the high-energy pipelines and causing cracking or fracture at the joints between pipelines and elbows and between pipelines and tees.

[0003] Once a fracture occurs at the joints between high-energy pipelines and elbows and between high-energy pipelines and tees, the abundant high-energy media in the pipelines forms continuous jets at the elbows and tees, creating a continuous driving force acting on the high-energy pipelines and causing the high-energy pipelines to whip.

[0004] The space inside the nuclear island of a nuclear power plant is narrow, and the main equipment of the evaporator is fully arranged. Once the high-energy pipelines inside the nuclear island whip, they will strike the main nuclear power equipment, resulting in damage to the main nuclear power equipment and causing major accidents. To fully ensure the safe operation of the main nuclear power equipment, high-energy pipeline whipping limit components must be installed on the high-energy pipelines inside the nuclear island. Currently, the commonly installed high-energy pipeline whipping limit components inside the nuclear island are U-shaped whipping limit components.

[0005] As Figures 1-6 shown, the U-shaped whipping limit component has the following problems: The U-shaped whipping limit component inevitably has a geometric deformation stage. During this stage, the resistance formed by the geometric deformation of the whipping limit component to the high-energy pipeline is very small, almost negligible. In this way, the whipping speed of the high-energy pipeline continues to increase, and the whipping energy continues to increase, increasing the subsequent energy consumption requirements of the U-shaped whipping limit component; The U-shaped whipping limit component begins to consume the whipping energy of the high-energy pipeline during the plastic deformation stage. The resistance formed by the U-shaped whipping limit component to the high-energy pipeline is the largest at the beginning of the plastic deformation of the U-shaped whipping limit component. As the plastic deformation of the U-shaped whipping limit component progresses, the U-shaped whipping limit component begins to neck down, that is, the diameter of the end connection of the U-shaped whipping limit component continuously becomes smaller, resulting in a decrease in the bearing capacity of the U-shaped whipping limit component. At the same time, the resistance of the U-shaped whipping limit component to the high-energy pipeline also decreases; The resistance formed by the U-shaped impact limiting part on the high-energy pipeline during the plastic deformation stage changes from large to small, and the resistance formed on the high-energy pipeline during the whole process is uneven. Summary of the Invention

[0006] To solve the above problems and further improve the safety of nuclear power operation, the present invention proposes a fixed-load impact limiting device for high-energy pipelines in nuclear power.

[0007] The technical solution of the present invention is as follows: A fixed-load impact limiting device for high-energy pipelines in nuclear power, comprising a left pin head 1, a left end cover 1, a cylinder barrel 1, a limit bushing 1, an energy-consuming pipe 1, a drawing rod 1, a right end cover 1 and a right pin head 1; On the outer periphery of the right part of the left end cover 1, a left end cover 1 boss is machined. In the center of the right part of the left end cover 1, a left end cover 1 hole groove is machined. In the center of the left part of the left end cover 1, an axially penetrating left end cover 1 pin shaft mounting hole is machined; In the inner hole of the right part of the cylinder barrel 1, a cylinder barrel 1 connection thread is machined; In the inner hole of the left part of the energy-consuming pipe 1, an energy-consuming pipe 1 drawing head guiding cone hole is machined. On the right side of the energy-consuming pipe 1 drawing head guiding cone hole, an energy-consuming pipe 1 transition cone hole is machined. The energy-consuming pipe 1 transition cone hole forms a resistance growth area during the drawing process. On the right side of the energy-consuming pipe 1 transition cone hole is an energy-consuming pipe 1 fixed-load deformation hole, and the energy-consuming pipe 1 fixed-load deformation hole forms a fixed-load plastic deformation area during the drawing process; The left end of the drawing rod 1 is a drawing head 1. On the right side of the drawing head 1 is a drawing head 1 connecting rod section. The drawing head 1 connecting rod section is machined with a drawing rod 1 guiding column. On the right side of the drawing rod 1 guiding column is the drawing rod 1 body. The right end of the drawing rod 1 is machined with a drawing rod 1 connection thread; In the center of the right end cover 1, an axially penetrating right end cover 1 center hole is machined. In the right part of the right end cover 1 center hole, a right end cover 1 dust-proof ring groove is machined. On the outer periphery of the left end of the right end cover 1, a right end cover 1 connection thread is machined. On the outer periphery of the right end of the right end cover 1, a right end cover 1 boss is machined. On the right part of the right end cover 1 boss, several radially arranged right end cover 1 mounting grooves are machined; The right end pin shaft of the left pin head 1 is inserted into the left end cover 1 pin shaft mounting hole to realize the positioning of the left pin head 1, and the left pin head 1 is reliably welded on the left end face of the left end cover 1; The left end cover 1 boss is inserted into the inner hole of the left part of the cylinder barrel 1, and the right part of the left end cover 1 and the left part of the cylinder barrel 1 are reliably welded; The limit bushing 1 is inserted into the cylinder barrel 1, and the left end of the limit bushing 1 abuts against the right side of the left end cover 1; The drawing rod 1 is inserted into the cylinder barrel 1; The energy-consuming pipe 1 is sleeved on the drawing rod 1 and inserted into the cylinder barrel 1; A right end cover dust-proof ring groove is installed with a right end cover dust-proof ring. The first right end cover is sleeved on the right part of the first pulling rod through a central hole of the first right end cover, and is reliably connected with the right end of the first cylinder barrel through a connecting thread of the first right end cover and a connecting thread of the first cylinder barrel. The first right pin head is reliably connected through a connecting thread of the first pulling rod. After the first left pin head, the first left end cover, the first cylinder barrel, the first limiting bushing, the first energy-consuming pipe, the first pulling rod, the first right end cover and the first right pin head are reliably connected, a first high-energy pipeline fixed-load whipping limiting device for nuclear power is formed. Moreover, when the first pulling head moves in the first limiting bushing, an idle stroke thermal displacement is formed. When the first pulling head moves in a transition conical hole of the first energy-consuming pipe, a resistance growth area is formed. The deformation amount of the transition conical hole of the first energy-consuming pipe gradually increases during the pulling process, effectively restricting the rebound of the first pulling rod. When the first pulling head moves in a fixed-load deformation hole of the first energy-consuming pipe, a fixed-load plastic deformation area is formed, fully consuming and absorbing the whipping energy of the high-energy pipeline. The left end of the first high-energy pipeline fixed-load whipping limiting device for nuclear power is reliably connected with an installation foundation through the first left pin head, a whipping limiting device pin seat and a pin shaft; the right end is reliably connected with a high-energy pipeline through the first right pin head, a pipe hoop pin seat, a pin shaft and a pipe hoop; and the fixed-load whipping limit in the stretching direction of the first high-energy pipeline fixed-load whipping limiting device can be realized.

[0008] In addition, by changing the positions of the pulling head and the pulling rod guide column of the first pulling rod and adjusting the left-right layout of the first energy-consuming pipe, the fixed-load whipping limit in the compression direction of the first high-energy pipeline fixed-load whipping limiting device can be realized.

[0009] The present invention also provides another high-energy pipeline fixed-load whipping limiting device for nuclear power, including a second left pin head, a second left end cover, a second cylinder barrel, a second energy-consuming pipe, a second right end cover, a second pulling rod and a second right pin head. The outer periphery of the right part of the second left end cover is processed with a boss of the second left end cover. The center of the right part of the second left end cover is processed with a hole groove of the second left end cover. The center of the left part of the second left end cover is processed with an axially penetrating pin shaft installation hole of the second left end cover. The outer periphery of the right part of the second cylinder barrel is processed with a connecting thread of the second cylinder barrel. The outer periphery of the right part of the second energy-consuming pipe is processed with an introducing cylindrical section of the second energy-consuming pipe. The left side of the introducing cylindrical section of the second energy-consuming pipe is processed with a transition conical section of the second energy-consuming pipe. The left side of the transition conical section of the second energy-consuming pipe is a fixed-load deformation section of the second energy-consuming pipe. The center of the second right end cover is processed with an axially penetrating central hole of the second right end cover. The inner edge of the central hole of the second right end cover is processed with a protruding pulling head of the second right end cover. The protruding part of the pulling head of the second right end cover abuts against the introducing cylindrical section of the second energy-consuming pipe. The outer periphery of the left end of the second right end cover is processed with a connecting thread of the second right end cover. The connecting thread of the second right end cover is threadedly connected with the connecting thread of the second cylinder barrel. The second drawing rod is inserted into the right inner hole of the second energy dissipation tube, and the second drawing rod is reliably welded to the right end face of the second energy dissipation tube; The right end pin shaft of the second left pin head is inserted into the pin shaft mounting hole of the second left end cover to realize the positioning of the second left pin head, and the second left pin head is reliably welded to the left end face of the second left end cover; The boss of the second left end cover is inserted into the left inner hole of the second cylinder barrel, and the right part of the second left end cover and the left part of the second cylinder barrel are reliably welded; After the second drawing rod and the second energy dissipation tube are welded and fixed, they are inserted into the second cylinder barrel; the left part of the second energy dissipation tube abuts against the right end face of the second left end cover; The second right pin head is reliably connected to the second drawing rod through a thread; After the second left pin head, the second left end cover, the second cylinder barrel, the second energy dissipation tube, the second right end cover, the second drawing rod and the second right pin head are reliably connected, a second nuclear power high-energy pipeline fixed-load whipping limiting device is formed; when the second drawing rod drives the second energy dissipation tube to move to the right, an idle stroke thermal displacement is formed in the cylindrical section area of the second energy dissipation tube for introduction, a resistance growth area is formed in the transition cone section of the second energy dissipation tube, the deformation amount of the transition cone section of the second energy dissipation tube gradually increases during the drawing process, effectively restricting the rebound of the second drawing rod, and a fixed-load plastic deformation area is formed in the fixed-load deformation section of the second energy dissipation tube, fully consuming and absorbing the whipping energy of the high-energy pipeline; The left end of the second nuclear power high-energy pipeline fixed-load whipping limiting device is reliably connected to the installation foundation through the second left pin head, the whipping limiting device pin seat and the pin shaft; the right end is reliably connected to the high-energy pipeline through the second right pin head, the pipe hoop pin seat and the pin shaft, and the pipe hoop, and can realize the fixed-load whipping limit in the stretching direction of the second high-energy pipeline fixed-load whipping limiting device.

[0010] In addition, the left and right layouts of the second energy dissipation tube are adjusted, and from left to right are successively the cylindrical section for introduction, the transition cone section and the fixed-load deformation section; a piston is connected to the left end of the second drawing rod through a thread, a piston locking thread hole is machined in the center of the piston, a second energy dissipation tube connecting body is installed in the left inner hole of the second energy dissipation tube, a second energy dissipation tube connecting body thread hole is machined in the center of the second energy dissipation tube connecting body, the outer periphery of the second energy dissipation tube connecting body is reliably welded in the left inner hole of the second energy dissipation tube, the second drawing rod forms a reliable connection with the second energy dissipation tube connecting body through the left end thread and the second energy dissipation tube connecting body thread hole, and forms a thread lock through the piston locking thread hole; the convex part of the drawing head of the second right end cover abuts against the cylindrical section for introduction of the second energy dissipation tube, and can realize the fixed-load whipping limit in the compression direction of the second high-energy pipeline fixed-load whipping limiting device.

[0011] The beneficial effects of the present invention are as follows: In the process of the present invention, through the drawing process of the drawing rod on the inner wall or outer wall of the energy-consuming pipe, the drawing head exerts a squeezing effect on the inner wall or outer wall of the energy-consuming pipe, causing plastic deformation of the inner wall or outer wall of the energy-consuming pipe, and absorbing and consuming the impact energy of the high-energy pipe. Compared with the traditional U-shaped impact limiting member, the fixed-load impact limiting device for high-energy pipes in nuclear power plants of the present invention has the following advantages: First, in the working process of the fixed-load impact limiting device for high-energy pipes in nuclear power plants of the present invention, there is no geometric deformation stage similar to that of the U-shaped impact limiting member, effectively curbing the further increase of the impact energy of the high-energy pipe during the impact process, and reducing the performance requirements for the impact limiting member to absorb and consume energy; Second, the fixed-load impact limiting device for high-energy pipes in nuclear power plants of the present invention is provided with a transition cone section of the energy-consuming pipe. When the impact limiting device works in the transition cone section of the energy-consuming pipe, the deformation amount of the transition cone section of the energy-consuming pipe gradually increases, effectively restricting the impact rebound of the high-energy pipe; Third, when the fixed-load impact limiting device for high-energy pipes in nuclear power plants of the present invention works in the fixed-load deformation section of the energy-consuming pipe, the energy-consuming pipe forms uniform plastic deformation, the plastic deformation amount remains unchanged, and the resistance generated by the high-energy pipe remains constant. Under the condition of generating the same maximum resistance to the high-energy pipe, the shortest impact distance is obtained, improving the protection ability for the main nuclear power equipment. Under the condition of the same impact distance generated by the high-energy pipe, the peak value of the resistance formed to the high-energy pipe is the smallest, effectively preventing the high-energy pipe from secondary fracture due to excessive resistance; In addition, when the fixed-load impact limiting device for high-energy pipes in nuclear power plants of the present invention works in the fixed-load deformation section of the energy-consuming pipe, the energy-consuming pipe forms uniform plastic deformation, effectively avoiding the formation of local necking and fracture of the energy-consuming pipe, and fully ensuring the reliability and safety of the impact limiting device during operation; Finally, when the performance of the fixed-load impact limiting device for high-energy pipes in nuclear power plants of the present invention is tested, the performance of the product obtained from the static test can be corrected through the speed correction coefficient to form the impact performance of the impact limiting device product, greatly reducing the difficulty of product performance testing, and being particularly suitable for the simulated impact performance testing of large-load high-energy impact limiting devices. At present, there is no available testing equipment for the simulated impact performance testing of large-load high-energy impact limiting devices. Description of the Drawings

[0012] Figure 1 is the initial installation top view of the U-shaped impact member; Figure 2 is the initial installation front view of the U-shaped impact member; Figure 3 is the view of the high-energy pipe impacting and pressing against the bottom of the U-shaped impact limiting member; Figure 4 is the view of the high-energy pipe impact driving the U-shaped impact limiting member to undergo geometric deformation; Figure 5 is the view of the U-shaped impact limiting member undergoing elastic deformation; Figure 6 is the view of the U-shaped impact limiting member undergoing plastic deformation; Figure 7 It is a schematic diagram of the high-energy pipeline fixed-load whipping limiting device (drawing on the inner wall of the energy-consuming pipe, stretching direction) in Embodiment 1; Figure 8 It is Figure 7 a schematic diagram of the left end cover in; Figure 9 It is Figure 7 a schematic diagram of the cylinder barrel in; Figure 10 It is Figure 7 a schematic diagram of the energy-consuming pipe in; Figure 11 It is Figure 7 a schematic diagram of the right end cover in; Figure 12 It is Figure 11 a side view of; Figure 13 It is Figure 7 a schematic diagram of the drawing pipe in; Figure 14 It is the initial installation diagram of the high-energy pipeline fixed-load whipping limiting device in Embodiment 1; Figure 15 It is the drawing head approaching the deformed pipe diagram of the high-energy pipeline fixed-load whipping in Embodiment 1; Figure 16 It is the drawing head entering the fixed-load plastic deformation zone diagram of the high-energy pipeline fixed-load whipping in Embodiment 1; Figure 17 It is a schematic diagram of the high-energy pipeline fixed-load whipping limiting device (drawing on the inner wall of the energy-consuming pipe, compressing direction) in Embodiment 1; Figure 18 It is a schematic diagram of the high-energy pipeline fixed-load whipping limiting device (drawing on the outer wall of the energy-consuming pipe, stretching direction) in Embodiment 2; Figure 19 It is Figure 18 a schematic diagram of the left end cover in; Figure 20 It is Figure 18 a schematic diagram of the energy-consuming pipe in; Figure 21 It is Figure 18 a schematic diagram of the right end cover in; Figure 22 It is a schematic diagram of the high-energy pipeline fixed-load whipping limiting device (drawing on the outer wall of the energy-consuming pipe, compressing direction) in Embodiment 2. Detailed implementation manners Embodiment 1

[0013] As shown in FIGS. 7-13, a high-energy pipeline fixed-load whipping limiting device for nuclear power includes a left pin head 1, a left end cover 2, a cylinder barrel 3, a limit bushing 4, an energy-consuming pipe 5, a drawing rod 6, a right end cover 7, and a right pin head 8; On the outer periphery of the right part of the left end cover 1-2, a left end cover 1 boss 2.1 is machined. In the center of the right part of the left end cover 1-2, a left end cover 1 hole groove 2.2 is machined. In the center of the left part of the left end cover 1-2, an axially through left end cover 1 pin shaft installation hole 2.3 is machined; In the inner hole of the right part of the cylinder barrel 1-3, a cylinder barrel 1 connection thread 3.1 is machined; In the inner hole of the left part of the energy dissipation pipe 1-5, an energy dissipation pipe 1 drawing head introduction tapered hole 5.1 is machined. On the right side of the energy dissipation pipe 1 drawing head introduction tapered hole 5.1, an energy dissipation pipe 1 transition tapered hole 5.2 is machined. The energy dissipation pipe 1 transition tapered hole 5.2 forms a resistance growth area during the drawing process. On the right side of the energy dissipation pipe 1 transition tapered hole 5.2 is an energy dissipation pipe 1 constant load deformation hole 5.3. The energy dissipation pipe 1 constant load deformation hole 5.3 forms a constant load plastic deformation area during the drawing process; The left end of the drawing rod 1-6 is a drawing head 1-6.1. On the right side of the drawing head 1-6.1 is a drawing head 1 connecting rod section 6.2. On the drawing head 1 connecting rod section 6.2, a drawing rod 1 guide post 6.3 is machined. On the right side of the drawing rod 1 guide post 6.3 is the drawing rod 1 body 6.4. On the right end of the drawing rod 1-6, a drawing rod 1 connection thread 6.5 is machined; In the center of the right end cover 1-7, an axially through right end cover 1 center hole 7.1 is machined. In the right part of the right end cover 1 center hole 7.1, a right end cover 1 dust-proof ring groove 7.2 is machined. On the outer periphery of the left end of the right end cover 1-7, a right end cover 1 connection thread 7.3 is machined. On the outer periphery of the right end of the right end cover 1-7, a right end cover 1 boss 7.4 is machined. On the right part of the right end cover 1 boss 7.4, a number of radially arranged right end cover 1 installation grooves 7.5 are machined; The right end pin shaft of the left pin head 1-1 is inserted into the left end cover 1 pin shaft installation hole 2.3 to realize the positioning of the left pin head 1-1. The left pin head 1-1 is reliably welded on the left end face of the left end cover 1-2; The left end cover 1 boss 2.1 is inserted into the inner hole of the left part of the cylinder barrel 1-3. The right part of the left end cover 1-2 and the left part of the cylinder barrel 1-3 are reliably welded; The limit bushing 1-4 is inserted into the cylinder barrel 1-3. The left end of the limit bushing 1-4 abuts against the right side of the left end cover 1-2; The drawing rod 1-6 is inserted into the cylinder barrel 1-3; The energy dissipation pipe 1-5 is sleeved on the drawing rod 1-6 and inserted into the cylinder barrel 1-3; The right end cover dust-proof ring groove 7.2 is installed with a right end cover dust-proof ring. The right end cover 1-7 is sleeved on the right part of the drawing rod 1-6 through the right end cover 1 center hole 7.1 and is reliably connected with the right end of the cylinder barrel 1-3 through the right end cover 1 connection thread 7.3 and the cylinder barrel 1 connection thread 3.1; The right pin head 1-8 forms a reliable connection through the drawing rod 1 connection thread 6.5; The left pin head 1, the left end cover 2, the cylinder barrel 3, the limit bushing 4, the energy dissipation pipe 5, the pulling rod 6, the right end cover 7 and the right pin head 8 are reliably connected to form a high-energy pipeline fixed-load whipping limit device 1 for nuclear power. And, when the pulling head 6.1 moves in the limit bushing 4, an idle stroke thermal displacement is formed. When the pulling head 6.1 moves in the transition conical hole 5.2 of the energy dissipation pipe, a resistance growth area is formed. The deformation amount of the transition conical hole 5.2 of the energy dissipation pipe gradually increases during the pulling process, effectively restricting the rebound of the pulling rod 6. When the pulling head 6.1 moves in the fixed-load deformation hole 5.3 of the energy dissipation pipe, a fixed-load plastic deformation area is formed, fully consuming and absorbing the whipping energy of the high-energy pipeline; The left end of the high-energy pipeline fixed-load whipping limit device 1 for nuclear power is reliably connected to the installation foundation through the left pin head 1, the whipping limit device pin seat and the pin shaft; the right end is reliably connected to the high-energy pipeline through the right pin head 8, the pipe hoop pin seat and the pin shaft, and the pipe hoop; and the fixed-load whipping limit in the stretching direction of the high-energy pipeline fixed-load whipping limit device 1 can be realized.

[0014] As shown in Fig. 17, by changing the positions of the pulling head 6.1 and the pulling rod guide column 6.3 of the above-mentioned pulling rod 6 and adjusting the left and right layouts of the energy dissipation pipe 5, the fixed-load whipping limit in the compression direction of the high-energy pipeline fixed-load whipping limit device 1 can be realized.

[0015] As Figures 14-16 shown, when the high-energy pipeline whips to the right, the high-energy pipeline drives the pulling rod 6 to move to the right through the pipe hoop, the pipe hoop pin seat and the pin shaft, and the right pin head 8. First, it travels through the idle stroke thermal displacement without resistance; then, the pulling head 6.1 enters the transition conical hole 5.2 of the energy dissipation pipe, and the pulling head 6.1 gradually squeezes the transition conical hole 5.2 of the energy dissipation pipe, and the resistance generated by the fixed-load whipping limit device on the high-energy pipeline gradually increases, entering the resistance growth area, fully reducing the peak value of the impact load formed by the too-fast increase of the resistance of the fixed-load whipping limit device, and effectively reducing the whipping rebound of the functional pipeline caused by the too-large impact load; furthermore, the pulling head 6.1 enters the fixed-load deformation hole 5.3 of the energy dissipation pipe, and the pulling head 6.1 squeezes the inner wall of the fixed-load deformation hole 5.3 of the energy dissipation pipe. The resistance generated by the fixed-load whipping limit device on the high-energy pipeline basically remains constant, entering the fixed-load plastic deformation area, fully absorbing and consuming the whipping energy of the high-energy pipeline, effectively ensuring the safe operation of nuclear power equipment. The right end face of the pulling rod guide column 6.3 abuts against the left end face of the right end cover 7, and the rightward movement of the pulling rod 6 is restricted. Embodiment 2

[0016] As Figures 18-21 shown, the present invention also provides another high-energy pipeline fixed-load whipping limit device for nuclear power, including a left pin head 11, a left end cover 12, a cylinder barrel 13, an energy dissipation pipe 14, a right end cover 15, a pulling rod 16 and a right pin head 17; The right outer periphery of the left end cover 12 is processed with a left end cover second boss 12.1, the right center of the left end cover 2 is processed with a left end cover second hole groove 12.2, and the left center of the left end cover 12 is processed with an axially penetrating left end cover second pin shaft mounting hole 12.3; The right outer periphery of the cylinder barrel 13 is processed with a cylinder barrel 2 connecting thread 13.1; The outer periphery of the right part of the energy dissipation tube 14 is processed with an energy dissipation tube 2 introduction cylindrical section 14.1, the left side of the energy dissipation tube 2 introduction cylindrical section 14.1 is processed with an energy dissipation tube 2 transition cone section 14.2, and the left side of the energy dissipation tube 2 transition cone section 14.2 is an energy dissipation tube 2 fixed load deformation section 14.3; The center of the right end cover 15 is processed with an axially through right end cover center hole 15.1, and the inner edge of the right end cover center hole 15.1 is processed with a raised right end cover drawing head 15.3; the raised part of the right end cover drawing head 15.3 abuts against the energy dissipation tube second introduction cylindrical section 14.1; the left end periphery of the right end cover 15 is processed with a right end cover second connecting thread 15.2; the right end cover second connecting thread 15.2 is connected to the cylinder barrel second connecting thread 13.1 through a thread; The second pulling rod 16 is inserted into the inner hole of the right end of the second energy-consuming tube 14, and the second pulling rod 16 can be reliably welded to the right end surface of the second energy-consuming tube 14; The right end pin shaft of the left pin head 11 is inserted into the pin shaft mounting hole 12.3 of the left end cover 12 to realize the positioning of the left pin head 11. The left pin head 11 is reliably welded to the left end surface of the left end cover 12. The second boss 12.1 of the left end cover is inserted into the left inner hole of the second cylinder barrel 13, and the right part of the second left end cover 12 and the left part of the second cylinder barrel 13 are reliably welded; The pull rod 16 is welded and fixed to the energy dissipation tube 14 and then inserted into the cylinder 13; the left part of the energy dissipation tube 14 abuts against the right end surface of the left end cover 12; The right pin head 17 is reliably connected to the pull rod 16 via a thread; The left pin head 11, the left end cover 12, the cylinder 13, the energy dissipation tube 14, the right end cover 15, the pull rod 16 and the right pin head 17 are reliably connected to form a high-energy pipeline fixed load swing limiting device 2 for nuclear power; when the pull rod 16 drives the energy dissipation tube 14 to move rightward, an idle thermal displacement is formed in the energy dissipation tube 2 introduction cylindrical section 14.1 area, and a resistance growth area is formed in the energy dissipation tube 2 transition cone section 14.2. The deformation amount of the energy dissipation tube 2 transition cone section 14.2 gradually increases during the drawing process, effectively limiting the rebound of the pull rod 16, and forming a fixed load plastic deformation area in the fixed load deformation section 14.3 of the energy dissipation tube 2, which fully consumes and absorbs the high-energy pipeline's swing energy; The left end of the second high-energy pipeline fixed-load whipping restraint device for nuclear power is reliably connected to the installation foundation through the second left pin head 11, the whipping restraint device pin seat and the pin shaft; the right end is reliably connected to the high-energy pipeline through the second right pin head 17, the pipe hoop pin seat, the pin shaft and the pipe hoop, and can realize the fixed-load whipping restraint in the stretching direction of the second high-energy pipeline fixed-load whipping restraint device.

[0017] In addition, as Figure 22 shown, the above-mentioned second energy-consuming pipe 14 adjusts the left-right layout, and from left to right are the introduction cylindrical section, the transition conical section and the fixed-load deformation section in sequence; the left end of the second pulling rod 16 is threadedly connected to a piston 18, and a piston locking threaded hole 18.1 is machined in the center of the piston 18. A second energy-consuming pipe connecting body 19 is installed in the inner hole of the left part of the second energy-consuming pipe 14. A second energy-consuming pipe connecting body threaded hole 19.1 is machined in the center of the second energy-consuming pipe connecting body 19. The outer periphery of the second energy-consuming pipe connecting body 19 is reliably welded in the inner hole of the left end of the second energy-consuming pipe 14. The second pulling rod 16 is reliably connected to the second energy-consuming pipe connecting body 19 through the left end thread and the second energy-consuming pipe connecting body threaded hole 19.1, and forms a threaded lock through the piston locking threaded hole 18.1; the protruding part of the second right end cover pulling head 15.3 abuts against the introduction cylindrical section 14.1 of the second energy-consuming pipe, and can realize the fixed-load whipping restraint in the compression direction of the second high-energy pipeline fixed-load whipping restraint device.

[0018] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A high-energy pipeline fixed-load whipping limit device for nuclear power, characterized in that, It includes a left pin head 1, a left end cover 1 2, a cylinder barrel 1 3, a limit bushing 1 4, an energy dissipation pipe 1 5, a pulling rod 1 6, a right end cover 1 7, and a right pin head 1 8; On the outer periphery of the right part of the left end cover 1 2, a left end cover 1 boss 2.1 is machined. In the center of the right part of the left end cover 1 2, a left end cover 1 hole groove 2.2 is machined. In the center of the left part of the left end cover 1 2, an axially penetrating left end cover 1 pin shaft mounting hole 2.3 is machined; In the inner hole of the right part of the cylinder barrel 1 3, a cylinder barrel 1 connection thread 3.1 is machined; In the inner hole of the left part of the energy dissipation pipe 1 5, an energy dissipation pipe 1 pulling head introduction tapered hole 5.1 is machined. On the right side of the energy dissipation pipe 1 pulling head introduction tapered hole 5.1, an energy dissipation pipe 1 transition tapered hole 5.2 is machined. The energy dissipation pipe 1 transition tapered hole 5.2 forms a resistance growth area during the pulling process. On the right side of the energy dissipation pipe 1 transition tapered hole 5.2 is an energy dissipation pipe 1 constant load deformation hole 5.3, and the energy dissipation pipe 1 constant load deformation hole 5.3 forms a constant load plastic deformation area during the pulling process; The left end of the pulling rod 1 6 is a pulling head 1 6.

1. On the right side of the pulling head 1 6.1 is a pulling head 1 connecting rod segment 6.

2. On the pulling head 1 connecting rod segment 6.2, a pulling rod 1 guide post 6.3 is machined. On the right side of the pulling rod 1 guide post 6.3 is the pulling rod 1 body 6.

4. On the right end of the pulling rod 1 6, a pulling rod 1 connection thread 6.5 is machined; In the center of the right end cover 1 7, an axially penetrating right end cover 1 center hole 7.1 is machined. In the right part of the right end cover 1 center hole 7.1, a right end cover 1 dust-proof ring groove 7.2 is machined. On the outer periphery of the left end of the right end cover 1 7, a right end cover 1 connection thread 7.3 is machined. On the outer periphery of the right end of the right end cover 1 7, a right end cover 1 boss 7.4 is machined. On the right part of the right end cover 1 boss 7.4, several radially arranged right end cover 1 mounting grooves 7.5 are machined; The right end pin shaft of the left pin head 1 1 is inserted into the left end cover 1 pin shaft mounting hole 2.3 to realize the positioning of the left pin head 1 1, and the left pin head 1 1 is reliably welded on the left end face of the left end cover 1 2; The left end cover 1 boss 2.1 is inserted into the inner hole of the left part of the cylinder barrel 1 3, and a reliable weld is formed between the right part of the left end cover 1 2 and the left part of the cylinder barrel 1 3; The limit bushing 1 4 is inserted into the cylinder barrel 1 3, and the left end of the limit bushing 1 4 abuts against the right side of the left end cover 1 2; The pulling rod 1 6 is inserted into the cylinder barrel 1 3; The energy dissipation pipe 1 5 is sleeved on the pulling rod 1 6 and inserted into the cylinder barrel 1 3; A right end cover dust-proof ring is installed in the right end cover dust-proof ring groove 7.

2. The right end cover 1 7 is sleeved on the right part of the pulling rod 1 6 through the right end cover 1 center hole 7.1, and a reliable connection is formed with the right end of the cylinder barrel 1 3 through the right end cover 1 connection thread 7.3 and the cylinder barrel 1 connection thread 3.1; The right pin head one (8) forms a reliable connection through the drawing rod one connecting thread (6.5); After the left pin head one (1), the left end cover one (2), the cylinder barrel one (3), the limit bushing one (4), the energy dissipation pipe one (5), the drawing rod one (6), the right end cover one (7) and the right pin head one (8) are reliably connected, a nuclear power high-energy pipeline fixed-load whipping limiting device one is formed. Moreover, when the drawing head one (6.1) moves within the limit bushing one (4), an idle stroke thermal displacement is formed. When the drawing head one (6.1) moves within the energy dissipation pipe one transition conical hole (5.2), a resistance growth area is formed. The deformation amount of the energy dissipation pipe one transition conical hole (5.2) gradually increases during the drawing process, effectively restricting the rebound of the drawing rod (6). When the drawing head one (6.1) moves within the energy dissipation pipe one fixed-load deformation hole (5.3), a fixed-load plastic deformation area is formed, fully consuming and absorbing the whipping energy of the high-energy pipeline; The left end of the nuclear power high-energy pipeline fixed-load whipping limiting device one is reliably connected to the installation foundation through the left pin head one (1), the whipping limiting device pin seat and the pin shaft; the right end is reliably connected to the high-energy pipeline through the right pin head one (8), the pipe hoop pin seat and the pin shaft, and the pipe hoop, capable of realizing the fixed-load whipping limit in the stretching direction of the high-energy pipeline fixed-load whipping limiting device one.

2. The high-energy pipeline fixed-load whipping restraint device for nuclear power according to claim 1, characterized in that, The drawing rod one (6) changes the positions of the drawing head (6.1) and the drawing rod guide post (6.3), and adjusts the left and right layout of the energy dissipation pipe one, capable of realizing the fixed-load whipping limit in the compression direction of the high-energy pipeline fixed-load whipping limiting device one.

3. The high-energy pipeline fixed-load whipping restraint device for nuclear power according to claim 1, characterized in that, The cross-sectional shape of the drawing head (6.1) is arc-shaped or conical.

4. A high-energy pipeline fixed-load whipping limit device for nuclear power, characterized in that, It includes a left pin head two (11), a left end cover two (12), a cylinder barrel two (13), an energy dissipation pipe two (14), a right end cover two (15), a drawing rod two (16) and a right pin head two (17); On the outer periphery of the right part of the left end cover two (12), a left end cover two boss (12.1) is machined. In the center of the right part of the left end cover two (2), a left end cover two hole groove (12.2) is machined. In the center of the left part of the left end cover two (12), an axially penetrating left end cover two pin shaft installation hole (12.3) is machined; On the outer periphery of the right part of the cylinder barrel two (13), a cylinder barrel two connection thread (13.1) is machined; On the outer periphery of the right part of the energy dissipation pipe two (14), an energy dissipation pipe two guiding cylinder section (14.1) is machined. On the left side of the energy dissipation pipe two guiding cylinder section (14.1), an energy dissipation pipe two transition conical section (14.2) is machined. On the left side of the energy dissipation pipe two transition conical section (14.2) is the energy dissipation pipe two fixed-load deformation section (14.3); In the center of the right end cover two (15), an axially penetrating right end cover two center hole (15.1) is machined. On the inner edge of the right end cover two center hole (15.1), a protruding right end cover two drawing head (15.3) is machined. The protruding part of the right end cover two drawing head (15.3) abuts against the energy dissipation pipe two guiding cylinder section (14.1); on the outer periphery of the left end of the right end cover two (15), a right end cover two connection thread (15.2) is machined. The right end cover two connection thread (15.2) is threadedly connected to the cylinder barrel two connection thread (13.1); The second drawing rod (16) is inserted into the right-end inner hole of the second energy dissipation tube (14), and the second drawing rod (16) is reliably welded to the right-end face of the second energy dissipation tube (14); The right-end pin shaft of the second left pin head (11) is inserted into the second left-end cover pin shaft mounting hole (12.3) to position the second left pin head (11), and the second left pin head (11) is reliably welded to the left-end face of the second left-end cover (12); The second left-end cover boss (12.1) is inserted into the left-part inner hole of the second cylinder barrel (13), and reliable welding is achieved between the right part of the second left-end cover (12) and the left part of the second cylinder barrel (13); After the second drawing rod (16) and the second energy dissipation tube (14) are welded and fixed, they are inserted into the second cylinder barrel (13); the left part of the second energy dissipation tube (14) abuts against the right-end face of the second left-end cover (12); The second right pin head (17) is reliably connected to the second drawing rod (16) by means of a thread; After the second left pin head (11), the second left-end cover (12), the second cylinder barrel (13), the second energy dissipation tube (14), the second right-end cover (15), the second drawing rod (16) and the second right pin head (17) are reliably connected, a second nuclear power high-energy pipeline fixed-load whipping restraint device is formed; when the second drawing rod (16) drives the second energy dissipation tube (14) to move rightward, an idle stroke thermal displacement is formed in the area of the second energy dissipation tube lead-in cylindrical section (14.1), a resistance growth area is formed in the second energy dissipation tube transition cone section (14.2), the deformation amount of the second energy dissipation tube transition cone section (14.2) gradually increases during the drawing process, effectively restricting the rebound of the second drawing rod (16), and a fixed-load plastic deformation area is formed in the second energy dissipation tube fixed-load deformation section (14.3), fully consuming and absorbing the whipping energy of the high-energy pipeline; The left end of the second nuclear power high-energy pipeline fixed-load whipping restraint device is reliably connected to the installation foundation through the second left pin head (11), the whipping restraint device pin seat and the pin shaft; the right end is reliably connected to the high-energy pipeline through the second right pin head (17), the pipe hoop pin seat and the pin shaft, and the pipe hoop, and the second nuclear power high-energy pipeline fixed-load whipping restraint device can achieve fixed-load whipping restraint in the stretching direction.

5. A high-energy pipeline fixed-load whipping limit device for nuclear power according to claim 4, characterized in that, The layout of the second energy dissipation tube (14) is adjusted from left to right in sequence as a lead-in cylindrical section, a transition cone section and a fixed-load deformation section; a piston (18) is connected to the left end of the second drawing rod (16) by means of a thread, a piston locking thread hole (18.1) is machined in the center of the piston (18), a second energy dissipation tube connecting body (19) is installed in the left-part inner hole of the second energy dissipation tube (14), a second energy dissipation tube connecting body thread hole (19.1) is machined in the center of the second energy dissipation tube connecting body (19), the outer periphery of the second energy dissipation tube connecting body (19) is reliably welded in the left-end inner hole of the second energy dissipation tube (14), the second drawing rod (16) is reliably connected to the second energy dissipation tube connecting body (19) through the left-end thread and the second energy dissipation tube connecting body thread hole (19.1), and thread locking is achieved through the piston locking thread hole (18.1); the protruding part of the second right-end cover drawing head (15.3) abuts against the second energy dissipation tube lead-in cylindrical section (14.1), and the second nuclear power high-energy pipeline fixed-load whipping restraint device can achieve fixed-load whipping restraint in the compression direction.

6. The high-energy pipeline fixed-load whipping limit device for nuclear power according to claim 4, characterized in that, The cross-sectional shape of the second drawing head (15.3) of the right end cover is an arc-shaped flaring mouth or a conical flaring mouth.

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