Self-locking butterfly valve linkage mechanism for switching of condenser-extraction back working condition of 1000mw thermal power unit

Abstract

This invention discloses a self-locking butterfly valve linkage mechanism for switching between condensing and extraction / backflow operation modes in a 1000MW thermal power unit. It relates to the field of butterfly valves for thermal power units and includes a butterfly valve tube. Both ends of the butterfly valve tube are fixedly connected to connecting flanges. A connecting disc is fixedly connected to the top of the butterfly valve tube, and an actuator is bolted to the top of the connecting disc. Inside the butterfly valve tube, near the top and bottom, are two connecting blocks. A rotating shaft is rotatably connected between the two connecting blocks, and the outer surface of the rotating shaft is fixedly connected to the connecting blocks. A conical sealing plate is fixedly connected to the side of the connecting blocks. Inside the butterfly valve tube, symmetrically fixed to the sides of the connecting blocks, are a pair of connecting blocks (two secondary blocks). A flow divider is rotatably connected between the two connecting blocks (two secondary blocks). This invention, through the synchronous rotation mechanism of the pulley, belt, and flow divider, allows the flow divider to automatically adjust its angle when the valve is opened, diverting the inflow of water and effectively reducing the direct impact of the water flow on the side of the conical sealing plate.

Description

Technical Field

[0001] This invention relates to the field of butterfly valves for thermal power units, and particularly to a self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit. Background Technology

[0002] A butterfly valve is a simple regulating valve that controls the flow of media in a pipeline by rotating a disc-shaped butterfly plate around an axis within the valve body. A 90° rotation is sufficient for rapid opening and closing. It is mainly used to cut off or regulate flow. However, when traditional butterfly valves are applied to high-pressure water flow scenarios such as switching between condensate and extraction modes in thermal power units, the high-speed medium directly impacts the valve plate when the valve is opened. This makes it impossible to divert the high-speed medium and thus cannot alleviate the impact force of the high-speed medium on the valve plate. Long-term operation can easily lead to erosion and wear of the valve plate sealing surface, affecting sealing performance and shortening the life of critical components. Summary of the Invention

[0003] The main objective of this invention is to provide a self-locking butterfly valve linkage mechanism for switching between condensing and extraction modes in a 1000MW thermal power unit, which can divert high-speed media and reduce the impact on the conical sealing plate.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit includes a butterfly valve tube. Both ends of the butterfly valve tube are fixedly connected to connecting flanges. A connecting plate is fixedly connected to the top of the butterfly valve tube. An actuator is bolted to the top of the connecting plate. Connecting blocks 1 are fixedly connected to the top and bottom of the butterfly valve tube. A rotating shaft is rotatably connected between the two connecting blocks. Connecting blocks are fixedly connected to the outer surface of the rotating shaft. A conical sealing plate is fixedly connected to the side of the connecting blocks. A pair of connecting blocks 2 are symmetrically fixedly connected to the inside of the butterfly valve tube and to the side of the connecting blocks. A flow divider is rotatably connected between the two connecting blocks 2. An insert shaft is inserted into the top of the rotating shaft and inside the connecting plate. An insert shaft is also inserted into the top of the flow divider and on the outer surface of the butterfly valve tube. Pulleys are fixedly connected to the top of both insert shafts. A belt is fitted between the two pulleys.

[0005] As a further embodiment of the present invention, the output shaft of the actuator is fixedly connected to the pulley at one end of the butterfly valve tube, and the conical sealing plate is adaptively matched with the connecting ring.

[0006] As a further embodiment of the present invention, a baffle is fixedly connected to the outer surface of the butterfly valve tube and to the other end, and the side of the flow divider is arranged in a triangular shape.

[0007] As a further embodiment of the present invention, a ratchet is fixedly connected to the top of the pulley at the other end of the butterfly valve tube, a pawl is rotatably connected to the outer surface of the butterfly valve tube, and a spring is fixedly connected to the side of the pawl and the inner wall of the baffle.

[0008] As a further embodiment of the present invention, the ratchet is simultaneously rotatably connected to the inside of the guard, and one end of the pawl is adaptively matched with the ratchet.

[0009] As a further embodiment of the present invention, a second ratchet is fixedly connected to the top of the rotating end of the pawl, and a second ratchet is fixedly connected to the top of the rotating end of the pawl. A fixing sleeve is connected to the inside of the cover and to the outer surface of the second ratchet by screws. A plurality of second springs are fixedly connected at equal intervals to the inner wall of the fixing sleeve. A connecting ball is fixedly connected to one end of the second spring. The shaft of the second ratchet passes through the top of the cover.

[0010] As a further embodiment of the present invention, the connecting ball is pressed against the vertical surface of the second ratchet, and the second ratchet is rotatably connected to the inside of the baffle.

[0011] The beneficial effects that can be achieved by the above embodiments of the present invention include: by setting a synchronous rotation mechanism of pulleys, belts and diverting blocks, the diverting blocks can automatically adjust their angle when the valve is opened to divert the inflowing water flow, effectively reducing the direct impact of the water flow on the side of the conical sealing plate, reducing valve wear and extending the service life of the equipment; By setting a self-locking structure of ratchet, pawl and spring, the flow divider block can be automatically locked in the initial position to prevent accidental rotation due to water flow impact, thereby enhancing the stability and reliability of the valve during operation and ensuring the safety of the working condition switching process. By setting the ratchet two and the connecting ball to squeeze together, the ratchet one and the pawl are actively locked, providing a guarantee for vibration-proof unlocking. When the pawl is in the locked position, the tooth surface of the ratchet two at the top of the pawl forms a stable engagement with the connecting ball supported by the spring, which effectively resists the continuous impact caused by water flow pulsation or system vibration during equipment operation, and prevents the pawl from being accidentally "loosened" and disengaged from the locked position, greatly improving the reliability and durability of the self-locking state. By incorporating a sliding ball-connected structure between ratchet two and a spring, a safe and controllable unlocking mechanism is achieved. This design ensures a secure lock while also preventing the risk of accidental operation. The pawl can only be released by actively lifting and rotating the shaft of ratchet two, allowing the diverter block to reset. This process requires human intervention, effectively preventing accidental unlocking during normal operation or water flow impact, thus ensuring the accuracy of the valve's action logic and the safety of operation. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the self-locking butterfly valve linkage mechanism for switching between condensing and extraction back-end operating conditions in a 1000MW thermal power unit according to the present invention. Figure 2 This is a partial rear view of the self-locking butterfly valve linkage mechanism for switching between condensing and extraction back-end operating conditions in a 1000MW thermal power unit according to the present invention. Figure 3 This is a schematic diagram of the internal structure of the self-locking butterfly valve linkage mechanism for switching between condensing and extraction back-flow conditions in a 1000MW thermal power unit according to the present invention. Figure 4 This is a schematic diagram of the connection structure between the diverter block and the pulley in the self-locking butterfly valve linkage mechanism for switching between condensing and extraction back-end conditions of a 1000MW thermal power unit according to the present invention. Figure 5 This is a schematic diagram of the self-locking structure in the self-locking butterfly valve linkage mechanism for switching between condensing and extraction back-end operating conditions of a 1000MW thermal power unit according to the present invention. Figure 6 This is a schematic diagram of the ratchet wheel and connecting ball mechanism in the self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions of a 1000MW thermal power unit according to the present invention.

[0013] In the diagram: 1. Butterfly valve pipe; 2. Connecting flange; 3. Connecting disc; 4. Actuator; 5. Connecting ring; 6. Conical sealing plate; 7. Connecting block; 8. Rotating shaft; 9. Connecting block one; 10. Baffle; 11. Insert shaft; 12. Pulley; 13. Diverter block; 14. Connecting block two; 15. Pawl; 16. Spring one; 17. Fixing sleeve; 18. Spring two; 19. Connecting ball; 20. Ratchet one; 21. Ratchet two. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0015] like Figures 1-6 As shown, the self-locking butterfly valve linkage mechanism for switching between condensing and extraction modes in a 1000MW thermal power unit includes a butterfly valve pipe 1. Both ends of the butterfly valve pipe 1 are fixedly connected to connecting flanges 2. The top of the butterfly valve pipe 1 is fixedly connected to a connecting plate 3. The top of the connecting plate 3 is connected to an actuator 4 by bolts. The inside of the butterfly valve pipe 1 is fixedly connected to connecting blocks 1 9 near the top and bottom. A rotating shaft 8 is rotatably connected between two connecting blocks 7. The outer surface of the rotating shaft 8 is fixedly connected to the connecting blocks 7. A conical sealing plate 6 is fixedly connected to the side of the connecting blocks 7. A pair of connecting blocks 2 14 are symmetrically fixedly connected to the inside of the butterfly valve pipe 1 and to the side of the connecting blocks 7. A diverter block 13 is rotatably connected between the two connecting blocks 2 14. An insert shaft 11 is inserted into the top of the rotating shaft 8 and inside the connecting plate 3. An insert shaft 11 is also inserted into the top of the diverter block 13 and to the outer surface of the butterfly valve pipe 1. A pulley 12 is fixedly connected to the top of both insert shafts 11. A belt is sleeved between the two pulleys 12. In actual operation, the butterfly valve pipe 1 is connected to the external pipeline by external bolts. When the actuator 4 is started, the rotating shaft 8 is driven to rotate, thereby driving the docking block 7 together with the conical sealing plate 6 to rotate along the center of the rotating shaft 8, so that the conical sealing plate 6 is separated from the connecting ring 5. Therefore, the other end of the butterfly valve pipe 1 is in an open state at this time, and the water in the external pipeline can flow through the butterfly valve pipe 1. The actuator 4 first drives the pulley 12 at one end of the butterfly valve pipe 1 to rotate, then drives the insert shaft 11 to rotate, and then drives the rotating shaft 8 to rotate. Therefore, while driving the pulley 12 at one end of the butterfly valve pipe 1 to rotate, the pulley 12 at the other end is driven to rotate synchronously through the belt, thereby driving the diverter block 13 to rotate along a pair of connecting blocks 14. When the conical sealing plate 6 rotates to ninety degrees, the side of the diverter block 13 faces the port of the butterfly valve pipe 1. When the water flows into the butterfly valve pipe 1, it will be diverted by the diverter block 13 first, thereby reducing the impact of the water flow on the side of the conical sealing plate 6.

[0016] In this embodiment, the output shaft of the actuator 4 is fixedly connected to the pulley 12 at one end of the butterfly valve tube 1, and the conical sealing plate 6 is adaptively matched with the connecting ring 5.

[0017] In this embodiment, a baffle 10 is fixedly connected to the outer surface of the butterfly valve pipe 1 and to the other end, and the side of the diverter block 13 is arranged in a triangular shape.

[0018] In this embodiment, a ratchet 20 is fixedly connected to the top of the pulley 12 at the other end of the butterfly valve tube 1, a pawl 15 is rotatably connected to the outer surface of the butterfly valve tube 1, and a spring 16 is fixedly connected to the side of the pawl 15 and the inner wall of the cover 10. When the diverter block 13 is in its initial state, the side of the diverter block 13 faces the side of the butterfly valve pipe 1. At this time, the water flow will first impact the diverter block 13, but the conical sealing plate 6 blocks the flow of water. When the water flow impacts the diverter block 13, it will cause the diverter block 13 to be impacted and rotate counterclockwise, thereby driving the pulley 12 to rotate counterclockwise, and driving the ratchet 120 to rotate counterclockwise. When the teeth of the ratchet 120 engage with one end of the pawl 15, the ratchet 21 and the connecting ball 19 lock it, preventing it from rotating. Therefore, through the cooperation of the ratchet 120 and the pawl 15, the diverter block 13 is self-locked.

[0019] In this embodiment, ratchet 20 is rotatably connected to the inside of the guard 10, and one end of the pawl 15 is adaptively matched with ratchet 20.

[0020] In this embodiment, a ratchet 21 is fixedly connected to the top of the rotating end of the pawl 15. The ratchet 21 is fixedly connected to the top of the rotating end of the pawl 15. A fixing sleeve 17 is connected to the inside of the cover 10 and to the outer surface of the ratchet 21 by screws. A plurality of springs 18 are fixedly connected at equal intervals to the inner wall of the fixing sleeve 17. A connecting ball 19 is fixedly connected to one end of the springs 18. The shaft of the ratchet 21 passes through the top of the cover 10. When the pawl 15 is pressed by the inclined surface of ratchet 20 and is about to rotate, it will drive ratchet 21, causing the inclined surface of ratchet 21 to press against the connecting ball 19, thus compressing the spring 18. The connecting ball 19 will not block the clockwise rotation of ratchet 21, allowing the pawl 15 to rotate. When actively resetting the diverter block 13, when ratchet 20 is rotated counterclockwise by pulley 12, ratchet 21 is first slid upward through the shaft of ratchet 21, so that the teeth of ratchet 21 are not connected to the connecting ball 19. At this time, rotating ratchet 20 counterclockwise will drive the pawl 15 to move, thus allowing the diverter block 13 to be reset normally.

[0021] In this embodiment, the connecting ball 19 is pressed against the vertical surface of the ratchet 21, and the ratchet 21 is rotatably connected to the inside of the baffle 10.

[0022] It should be noted that this invention is a self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit. During use, the left mounting plate 1 and right mounting plate 5 are installed and fixed to the wall or a fixed column using screws to install the entire charging pile. The cable connecting the charging pile passes through the cable drag chain 20 into the drag chain docking box 14, then passes through the mounting frame 13 and connects to the conductive socket 15, allowing external power to be supplied to the conductive socket 15 first. The charging box 21 is initially separated from the mounting frame 13. The charging box 21 is then lifted and moved using the lifting handle 23. The charging box 21 slides on the upper part of the docking support rod 18 towards the mounting frame 13, so that the charging box 21 fits into the mounting frame 13. At the same time, the docking plate 24 enters the middle of the two lock core plates 16, and the docking plug 25 is inserted into the conductive socket 15 for connection. The conductive connection between the docking plug 25 and the conductive socket 15 is used to supply power to the charging box 21. At the same time, the lock head of the lock core plate 16 is inserted into the upper end of the charging box 21 to lock the charging box 21. Then, the charging plug 30 is pulled out from the plug fixing plate 29 and connected to the vehicle to charge the vehicle. The left and right movement of the charging box 21 drives the drive shaft 3 to rotate via the drive motor 4. The rotation of the drive shaft 3 drives the moving belt 9 to move. The other end of the moving belt 9 moves around the driven shaft 7. Therefore, the moving belt 9 moves cyclically above and below the inner side of the guide rail 8. Then, the moving belt 9 drives the moving mounting plate 10 to move via the connecting block 12. The moving mounting plate 10 then moves left and right around the guide rail 8 via the moving wheel 11. Finally, the charging box 21 moves left and right to adjust the usage position of the charging plug 30. Before use, the charging plug 30 can be rotated by rotating the mounting base 28, so that the connecting ring 27 at the upper end of the mounting base 28 can rotate around the charging box 21, thereby changing the orientation of the charging plug 30. When the charging plug 30 is used in two parking spaces at the same time, it is more convenient to plug and unplug the two charging plugs 30 in different directions. By disassembling the charging box 21, the charging box 21 slides on the upper end of the docking support rod 18 and connects with the mounting frame 13. Then, the docking plug 25 is used to make a conductive connection with the conductive socket 15. Conversely, the charging box 21 also slides forward around the docking support rod 18, so that the docking plug 25 is separated from the conductive socket 15 and disconnected from the mounting frame 13. The charging box 21 is disassembled separately, which facilitates the maintenance, replacement and upgrade of the core components.

Claims

1. A self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit, comprising a butterfly valve pipe (1), wherein both ends of the butterfly valve pipe (1) are fixedly connected to connecting flanges (2), and a connecting disc (3) is fixedly connected to the top of the butterfly valve pipe (1), and an actuator (4) is bolted to the top of the connecting disc (3), characterized in that: Inside the butterfly valve tube (1), there are fixed connecting blocks 1 (9) at the top and bottom. A rotating shaft (8) is rotatably connected between two docking blocks (7). The outer surface of the rotating shaft (8) is fixedly connected to the docking block (7). A conical sealing plate (6) is fixedly connected to the side of the docking block (7). Inside the butterfly valve tube (1) and on the side of the docking block (7), there are a pair of fixed connecting blocks 2 (14) symmetrically connected. A diverter block (13) is rotatably connected between the two connecting blocks 2 (14). A plug shaft (11) is inserted into the top of the rotating shaft (8) and inside the connecting plate (3). A plug shaft (11) is also inserted into the top of the diverter block (13) and on the outer surface of the butterfly valve tube (1). A pulley (12) is fixedly connected to the top of the two plug shafts (11). A belt is sleeved between the two pulleys (12).

2. The self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit according to claim 1, characterized in that: The output shaft of the actuator (4) is fixedly connected to the pulley (12) at one end of the butterfly valve pipe (1), and the conical sealing plate (6) is adapted to the connecting ring (5).

3. The self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit according to claim 1, characterized in that: The outer surface of the butterfly valve tube (1) and the other end are fixedly connected to a baffle (10), and the side of the diverter block (13) is arranged in a triangular shape.

4. The self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit according to claim 1, characterized in that: A ratchet (20) is fixedly connected to the top of the pulley (12) at the other end of the butterfly valve tube (1). A pawl (15) is rotatably connected to the outer surface of the butterfly valve tube (1). A spring (16) is fixedly connected to the side of the pawl (15) and the inner wall of the cover (10).

5. The self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit according to claim 4, characterized in that: The ratchet (20) is simultaneously rotatably connected to the inside of the guard (10), and one end of the pawl (15) is adaptively matched with the ratchet (20).

6. The self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit according to claim 1, characterized in that: The top of the rotating end of the pawl (15) is fixedly connected to the second ratchet (21). The rotating end of the pawl (15) is fixedly connected to the second ratchet (21) near the top. The inside of the cover (10) and the outer surface of the second ratchet (21) are connected to the fixing sleeve (17) by screws. Several second springs (18) are fixedly connected at equal intervals on the inner wall of the fixing sleeve (17). One end of the second spring (18) is fixedly connected to the connecting ball (19). The shaft of the second ratchet (21) passes through the top of the cover (10).

7. The self-locking butterfly valve linkage mechanism for switching between condensing and extraction operating conditions in a 1000MW thermal power unit according to claim 6, characterized in that: The connecting ball (19) is pressed against the vertical surface of the ratchet (21), and the ratchet (21) is rotatably connected to the inside of the cover (10).

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