A sealing component for a nuclear power plant main pump

Abstract

This invention discloses a sealing component for a main pump in a nuclear power plant, comprising a mounting plate. A main pump is located on the left side of the mounting plate, and a flange is mounted on the right side of the main pump. A water outlet pipe is mounted on the right side of the flange. A circular opening is formed on the mounting plate, through which the water outlet pipe passes. Guide rollers are located near the four corners on the right side of the mounting plate, and a first rotating shaft passes through the center of each of the guide rollers. The left end of each of the first rotating shafts passes through the inner cavity of the mounting plate. Through the cooperation of components such as a ball valve, protective cover, crossbar, reciprocating spring, annular plate, lifting rod, spring, and L-shaped welding rod, this invention enables liquid to overflow from the joint when the flange leaks, thereby pushing the ball valve to move. The movement of the ball valve pushes the lifting rod upwards, triggering a corresponding trigger switch, thus responding to the flange leak.

Description

Technical Field

[0001] This invention relates to the field of nuclear power plant main pump technology, specifically a sealing component for a nuclear power plant main pump. Background Technology

[0002] The main pump is the only actively rotating device in the primary loop nuclear steam system of a nuclear power plant. It is a key device that restricts the development of nuclear power plants in my country. As the core component of the shaft-sealed main pump, the long-term stable and reliable operation of the shaft seal not only affects the normal operation of the nuclear power plant, but also directly affects its safety. Once the main pump shaft seal fails, it will lead to the loss of the pressure boundary integrity of the primary loop of the nuclear power plant. If the leakage exceeds the capacity of the makeup water system, it will lead to the occurrence of a potential small breach accident, which will eventually lead to the exposed core meltdown.

[0003] When the existing main pump outlet seal ring leaks, the staff cannot detect the leak in time, which causes the liquid to change from a minor leak to a serious leak, resulting in economic losses. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: a sealing component for a main pump in a nuclear power plant, comprising a mounting plate, a main pump on the left side of the mounting plate, a flange on the right side of the main pump, a water outlet pipe on the right side of the flange, a circular opening on the mounting plate, the water outlet pipe penetrating the inner cavity of the circular opening, guide rollers near the four corners on the right side of the mounting plate, and a first rotating shaft penetrating the center of each of the guide rollers, the left ends of each of the first rotating shafts penetrating the inner cavity of the mounting plate, a rotating plate being fitted together among the guide rollers, a plurality of idler wheels being mounted on the right side of the mounting plate, the idler wheels being arranged in a cross shape, and the idler wheels being fitted against the outer side of the rotating plate, a winding roller being hinged to the front side of the rotating plate near the top, and the outer side of the winding roller being fitted with ... The system is wound with a winding tape, which is composed of several magnets and steel strips spliced ​​together in a cross pattern. A transmission roller is fixedly sleeved on the outer side of the first rotating shaft near its left end. A motor is located on the left side of the mounting plate near its bottom, and the motor's power output shaft is fixedly connected to the adjacent first rotating shaft. A belt is wrapped around the outer side of several transmission rollers. A first cylinder is installed on the right side of the main pump near its top, and the right end of the first cylinder is fixedly connected to the mounting plate. An L-shaped connecting plate is fixedly connected on the left side of the mounting plate near its front, with the side of the L-shaped connecting plate away from the mounting plate fixedly connected to the main pump. Two sealing plates are sleeved on the outer side of the flange, and the two sealing plates are symmetrically arranged. Several spherical grooves are formed on the sealing plates, and the inner cavities of the several spherical grooves are all fitted together. The device includes ball valves, with a common placement rod running through each pair of adjacent ball valves. A crossbar runs through the center of the placement rod and is fixedly connected to it. A reciprocating spring is sleeved on the outside of the crossbar. Two annular plates are symmetrically arranged on the outside of the crossbar. The right end of the crossbar is fixedly connected to the annular plates, and the left end is fixedly connected to the placement rod. A protective cover is sleeved on the outside of the sealing plate. Several openings are provided on the outside of the protective cover. A lifting rod is located inside the cavity of each opening. Rectangular grooves are provided on both the front and rear sides of the lifting rod. Springs are fixedly connected to the inner cavities of the rectangular grooves. A fitting ball is fixedly connected to the bottom end of the lifting rod. An L-shaped welded rod is fixedly connected to one end of each spring near the center of the protective cover. One vertical end of each of the shaped welding rods is fixedly connected to the outside of the protective cover. Baffles are fixedly connected to both sides of the protective cover, and each baffle has several openings arranged in a circular array around the center of the baffle. Vertical plates are fixedly connected to the outer sides of each of the circular plates, and the side of each vertical plate furthest from the center of the baffle is fixedly connected to the inner wall of the protective cover. A sleeve plate is fitted onto the outer side of the baffle on the right side. Two fixing plates are fixedly connected to the inner wall of the sleeve plate, and the two fixing plates are symmetrically arranged vertically. The corresponding sides of the two fixing plates are fixedly connected to the baffle. Several trigger switches are fixedly connected to the inner wall of the sleeve plate, and these trigger switches are arranged in a circular array around the center of the baffle.

[0005] Preferably, a circular plate is sleeved on the outside of the water outlet pipe, and a second cylinder is fixedly connected to the left side of the circular plate near the top. The left end of the second cylinder is fixedly connected to an adjacent baffle.

[0006] Preferably, an L-shaped fixing rod is fixedly connected to the right side of the main pump, and a cutting blade is fixedly connected to the end of the L-shaped fixing rod away from the main pump.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] This invention utilizes the interplay between components such as a ball valve, protective cover, crossbar, reciprocating spring, annular plate, lifting rod, spring, and L-shaped welding rod to enable liquid to overflow from the joint when a flange leaks, thereby pushing the ball valve to move. When the ball valve moves, it pushes the lifting rod upward, triggering the corresponding trigger switch and thus responding to the flange leak.

[0009] This invention utilizes the cooperation between components such as mounting plate, guide roller, rotating plate, idler wheel, winding roller, motor, first cylinder, belt, and transmission roller to achieve the winding of flange leaks, thereby enabling emergency treatment. Attached Figure Description

[0010] Figure 1 This is a front view of the structure of the present invention;

[0011] Figure 2 This is a left view of the structure of the present invention;

[0012] Figure 3 This is an exploded view of the internal structure of the protective cover of the component of the present invention;

[0013] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0014] Figure 5 This is a schematic diagram of the sealing plate structure of the component of the present invention;

[0015] Figure 6 This is a schematic diagram of the component mounting plate structure of the present invention;

[0016] Figure 7 This is a rear view of the component mounting plate structure of the present invention.

[0017] Labels in the diagram: 1. Mounting plate; 2. Belt; 3. First cylinder; 4. Main pump; 5. Guide roller; 6. Winding roller; 7. Idler wheel; 8. Circular plate; 9. Water outlet pipe; 10. Second cylinder; 11. Motor; 12. L-shaped fixing rod; 13. Sleeve plate; 14. L-shaped connecting plate; 15. Transmission roller; 16. Fixing plate; 17. Winding belt; 18. Flange; 19. Ball valve; 20. Protective cover; 21. Baffle; 22. Trigger switch; 23. Lifting rod; 24. Spring; 25. L-shaped welding rod; 26. Placement rod; 27. Crossbar; 28. Reciprocating spring; 29. ​​Annular plate; 30. Sealing plate; 31. Cutting knife; 32. Rotating plate. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figure 1-7 This invention provides a technical solution: a sealing component for a main pump in a nuclear power plant, comprising a mounting plate 1, a main pump 4 on the left side of the mounting plate 1, a flange 18 on the right side of the main pump 4, a water outlet pipe 9 on the right side of the flange 18, a circular opening on the mounting plate 1 through which the water outlet pipe 9 passes, guide rollers 5 near the four corners on the right side of the mounting plate 1, and a first rotating shaft penetrating the center of each of the guide rollers 5, with the left ends of each of the first rotating shafts penetrating the inner cavity of the mounting plate 1, a rotating plate 32 being fitted together between the guide rollers 5, and a plurality of idler wheels 7 arranged in a cross shape on the right side of the mounting plate 1, all of the idler wheels 7 being fitted against the outer side of the rotating plate 32. A winding roller 6 is hinged to the front side near the top of the 32. A winding tape 17 is wound around the outside of the winding roller 6. The winding tape 17 is composed of several magnets and steel strips spliced ​​together. A transmission roller 15 is fixedly sleeved on the outside of the first rotating shaft near the left end. A motor 11 is located on the left side of the mounting plate 1 near the bottom. The power output shaft of the motor 11 is fixedly connected to the adjacent first rotating shaft. A belt 2 is sleeved on the outside of several transmission rollers 15. A first cylinder 3 is installed on the right side of the main pump 4 near the top. The right end of the first cylinder 3 is fixedly connected to the mounting plate 1. An L-shaped connecting plate 14 is fixedly connected on the left side of the mounting plate 1 near the front side. The side of the L-shaped connecting plate 14 away from the mounting plate 1 is fixedly connected to the main pump 4.

[0020] Two sealing plates 30 are fitted onto the outer side of flange 18, and the two sealing plates 30 are symmetrically arranged from left to right. Several spherical grooves are opened on the sealing plates 30, and ball valves 19 are fitted into the inner cavities of the several spherical grooves. A placement rod 26 is provided through each pair of adjacent ball valves 19. A crossbar 27 is provided through the center of the placement rod 26 and is fixedly connected to it. A reciprocating spring 28 is fitted onto the outer side of the crossbar 27. Two annular plates 29 are fitted onto the outer side of the crossbar 27, and the two annular plates 29 are symmetrically arranged from left to right. The right end of the crossbar 27 is connected to the annular plate 29. Plate 29 is fixedly connected, and the left end of crossbar 27 is fixedly connected to placement rod 26. A protective cover 20 is sleeved on the outside of sealing plate 30. Several openings are provided on the outside of the protective cover 20. A lifting rod 23 is provided in the inner cavity of the opening. Rectangular grooves are provided on both the front and rear sides of the lifting rod 23. Springs 24 are fixedly connected in the inner cavity of the rectangular grooves. A fitting ball is fixedly connected to the bottom end of the lifting rod 23. An L-shaped welding rod 25 is fixedly connected to one end of several springs 24 near the center of the protective cover 20. The vertical end of several L-shaped welding rods 25 is fixedly connected to the protective cover. On the outer side of the protective cover 20, baffles 21 are fixedly connected to both the left and right sides. Several openings are provided on the baffles 21, arranged in a circular array around the center of the baffles 21. Vertical plates are fixedly connected to the outer sides of these circular plates 29, and the side of each vertical plate furthest from the center of the baffles 21 is fixedly connected to the inner wall of the protective cover 20. A sleeve plate 13 is fitted onto the outer side of the baffle 21 on the right side. Two fixing plates 16 are fixedly connected to the inner wall of the sleeve plate 13, and the two fixing plates 16 are symmetrically arranged vertically. One side of each fixed plate 16 is fixedly connected to the baffle 21. Several trigger switches 22 are fixedly connected to the inner wall of the sleeve plate 13. The trigger switches 22 are arranged in a circular array with the center of the baffle 21 as the center. A circular plate 8 is sleeved on the outside of the water outlet pipe 9. A second cylinder 10 is fixedly connected to the left side of the circular plate 8 near the top. The left end of the second cylinder 10 is fixedly connected to the adjacent baffle 21. An L-shaped fixing rod 12 is fixedly connected to the right side of the main pump 4. A cutting blade 31 is fixedly connected to the end of the L-shaped fixing rod 12 away from the main pump 4.

[0021] Working principle: When flange 18 overflows, liquid can impact the surface of ball valve 19 through the flange 18 joint. Ball valve 19 can move parallel to the surface of the placement rod 26, simultaneously pushing the reciprocating spring 28 to compress. When ball valve 19 moves, it can contact the ball at the bottom of the lifting rod 23, thereby driving the lifting rod 23 to move upward. When the lifting rod 23 moves upward, the L-shaped welding rod 25 can limit the movement trajectory of the lifting rod 23. The upward movement of the lifting rod 23 can trigger the corresponding trigger switch 22. When the trigger switch 22 is activated, the second cylinder 10 can drive the baffle 21 to move to the right. At the same time, the first cylinder 3 is activated, pushing the mounting plate 1 to move to the right. Simultaneously, the motor 1... 1. Upon startup, motor 11 drives the adjacent first rotating shaft to rotate via the power output shaft. The first rotating shaft drives the adjacent transmission roller 15 to rotate. The transmission roller 15 drives the remaining transmission rollers 15 to rotate via belt 2. When several transmission rollers 15 rotate, they drive the corresponding guide rollers 5 to rotate via the adjacent first rotating shaft. When several guide rollers 5 rotate, they drive the rotating plate 32 to rotate. When the rotating plate 32 rotates, it drives the winding roller 6 to rotate. When the winding roller 6 rotates, it causes the winding tape 17 on the surface to swing, thereby causing the magnet to contact the flange 18. At the same time, the steel strip wraps around the joint of the flange 18 to complete the seal. When the wrapping is completed, the first cylinder 3 drives the mounting plate 1 to return to its original position, and the winding tape 17 can be cut by the cutting blade 31.

[0022] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing component for a main pump in a nuclear power plant, comprising a mounting plate (1), characterized in that: The mounting plate (1) has a main pump (4) on its left side, a flange (18) on its right side, and a water outlet pipe (9) on its right side. The mounting plate (1) has a round opening, and the water outlet pipe (9) passes through the inner cavity of the round opening. There are guide rollers (5) near the four corners on the right side of the mounting plate (1), and a first rotating shaft passes through the center of each of the guide rollers (5). The left ends of the first rotating shafts pass through the inner cavity of the mounting plate (1). A rotating plate (32) is attached to the guide rollers (5). There are several idler wheels (7) on the right side of the mounting plate (1), and the idler wheels (7) are arranged in a cross shape. The idler wheels (7) are attached to the outer side of the rotating plate (32). A winding roller (6) is hinged to the front side of the rotating plate (32) near the top. A winding tape (17) is wound around the outside of the winding roller (6). The winding tape (17) is composed of several magnets and steel strips spliced ​​together. A transmission roller (15) is fixedly sleeved on the outside of the first rotating shaft near the left end. A motor (11) is located on the left side of the mounting plate (1) near the bottom. The power output shaft of the motor (11) is fixedly connected to the adjacent first rotating shaft. A belt (2) is sleeved on the outside of several transmission rollers (15). A first cylinder (3) is installed on the right side of the main pump (4) near the top. The right end of the first cylinder (3) is fixedly connected to the mounting plate (1). An L-shaped connecting plate is fixedly connected on the left side of the mounting plate (1) near the front. (14), and the L-shaped connecting plate (14) is fixedly connected to the main pump (4) on the side away from the mounting plate (1). Two sealing plates (30) are sleeved on the outside of the flange (18), and the two sealing plates (30) are symmetrically arranged on the left and right. Several spherical grooves are opened on the sealing plate (30), and ball valves (19) are fitted into the inner cavity of several spherical grooves. A placement rod (26) is provided through each two adjacent ball valves (19). A crossbar (27) is provided through the center of the placement rod (26) and is fixedly connected to it. A reciprocating spring (28) is sleeved on the outside of the crossbar (27). Two annular plates (29) are sleeved on the outside of the crossbar (27), and the two annular plates (29) are symmetrically arranged on the left and right. The crossbar (27) is fixedly connected to the right end of the annular plate (29), and fixedly connected to the left end of the crossbar (27) and the placement rod (26). A protective cover (20) is sleeved on the outside of the sealing plate (30). Several openings are provided on the outside of the protective cover (20). A lifting rod (23) is provided in the inner cavity of the opening. Rectangular grooves are provided on both the front and rear sides of the lifting rod (23). A spring (24) is fixedly connected in the inner cavity of the rectangular groove. A fitting ball is fixedly connected to the bottom end of the lifting rod (23). An L-shaped welding rod (25) is fixedly connected to one end of several springs (24) near the center of the protective cover (20). The vertical ends of several L-shaped welding rods (25) are fixedly connected to the outside of the protective cover (20).The protective cover (20) has baffles (21) fixedly connected to both sides. Each baffle (21) has several openings arranged in a circular array around the center of the baffle (21). Vertical plates are fixedly connected to the outer sides of each of the circular plates (29). The side of each vertical plate furthest from the center of the baffle (21) is fixedly connected to the inner wall of the protective cover (20). A sleeve plate (13) is fitted onto the outer side of the baffle (21) on the right side. Two fixing plates (16) are fixedly connected to the inner wall of the sleeve plate (13). The two fixing plates (16) are symmetrically arranged vertically. The corresponding sides of the two fixing plates (16) are fixedly connected to the baffle (21). Several trigger switches (22) are fixedly connected to the inner wall of the sleeve plate (13). These trigger switches (22) are arranged in a circular array around the center of the baffle (21).

2. A sealing component for a nuclear power plant main pump according to claim 1, characterized in that: A circular plate (8) is sleeved on the outside of the water outlet pipe (9). A second cylinder (10) is fixedly connected to the left side of the circular plate (8) near the top. The left end of the second cylinder (10) is fixedly connected to the adjacent baffle (21).

3. A sealing component for a nuclear power plant main pump according to claim 1, characterized in that: An L-shaped fixing rod (12) is fixedly connected to the right side of the main pump (4), and a cutting blade (31) is fixedly connected to the end of the L-shaped fixing rod (12) away from the main pump (4).

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