Steam pressure equalizing expansion joint for steam pipes of steam turbine of ship

Abstract

The utility model relates to the technical field of expansion joint, and disclose a steam pressure balance expansion joint of steam pipeline of steam turbine of steamer, solved the expansion joint of current cannot adjust the pipeline axial travel according to the use demand, when the pipeline axial displacement is too big, the damage of pipeline is easy to cause, reduces the problem of pipeline service life, it includes the mounting ring, the one side fixed mounting of mounting ring has left bellows, the other side fixed mounting of mounting ring has right bellows, the one end fixed mounting of left bellows away from mounting ring has first butt joint, the one end fixed mounting of right bellows away from mounting ring has second butt joint, the surface symmetrical fixed mounting of first butt joint has two left support seat, the one side fixed mounting of left support seat all has the sleeve, and the one end of sleeve all inserts and is equipped with the plug rod, this expansion joint can adjust the pipeline axial travel according to the use demand, avoid the damage when the pipeline axial displacement is too big, improve the service life of pipeline.

Description

Technical Field

[0001] This utility model belongs to the field of expansion joint technology, specifically a steam pressure balancing expansion joint for steam pipelines of ship turbines. Background Technology

[0002] A steam pressure balancing expansion joint for ship turbine steam pipelines is a device used to balance the pressure thrust of the medium in the pipeline. It eliminates the axial force generated by internal pressure through a mechanical structure, avoiding additional loads on the pipeline's fixed supports. It typically includes a working bellows, a balancing bellows, and a tie rod system. The bellows' elastic deformation absorbs thermal displacement and counteracts pressure thrust. Its main application is in ship turbine steam pipeline systems, where it compensates for additional stress caused by temperature changes and mechanical vibrations, protects pipeline connections from thermal expansion or mechanical stress, and extends the service life of the pipeline system. Furthermore, it is widely used in nuclear power plants, thermal power plants, and combined heat and power plants' turbine generator sets and heating pipelines, absorbing axial, lateral, and angular thermal deformation of the pipeline and reducing the impact of equipment vibration on the pipeline.

[0003] Existing expansion joints cannot adjust the axial travel of the pipeline according to usage requirements. Excessive axial displacement of the pipeline can easily cause damage and reduce its service life. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a steam pressure balancing expansion joint for steam pipelines of ship turbines. It effectively solves the problem that existing expansion joints cannot adjust the axial travel of the pipeline according to the usage requirements, and that excessive axial displacement of the pipeline can easily cause damage to the pipeline and reduce its service life.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steam pressure balancing expansion joint for a steam pipeline of a ship's steam turbine, comprising an installation ring, a left bellows fixedly installed on one side of the installation ring, and a right bellows fixedly installed on the other side of the installation ring. A first pair of joints is fixedly installed at the end of the left bellows away from the installation ring, and a second pair of joints is fixedly installed at the end of the right bellows away from the installation ring. Two left support seats are symmetrically fixedly installed on the surface of the first pair of joints. A sleeve is fixedly installed on one side of each left support seat, and a rod is inserted into one end of each sleeve. The lower part of the sleeve at the end away from the left support seat is fixedly connected to the top of the installation ring through a connector. One end of the rod... Each is fixedly equipped with a right support base, the bottom of which is fixedly connected to the top of the second pair of connectors. The other end of each insert rod is fixedly equipped with a push plate, and the two push plates are respectively installed inside the two sleeves. The inside of each sleeve is equipped with a telescopic spring, and the two ends of the two telescopic springs are respectively fixedly connected to the inner wall of one end of the sleeve and the push plate. One end of each insert rod is fixedly equipped with a fixing plate, and one side of each fixing plate is equipped with a sleeve plate. The two sleeve plates are movably fitted onto the surface of the two insert rods. The ends of the two sleeves that are far apart from each other are fixedly equipped with mounting frames through mounting blocks. The inside of the two mounting frames is equipped with a snap-fit ​​component for limiting the position of the two sleeve plates.

[0006] Preferably, the snap-fit ​​assembly includes two support arms, which are fixedly installed on the opposite sides of the two sleeves. Each of the two support arms has a limit strip fixedly installed at one end. The two limit strips are inserted into the interior of the two mounting frames. Each of the two mounting frames has a limit groove. The two limit strips are slidably installed in the interior of the two limit grooves. Each of the opposite sides of the two limit strips has several snap-fit ​​holes at equal intervals.

[0007] Preferably, a sliding sleeve is fixedly installed on the side of each of the two mounting frames that are far apart from each other. A sliding rod is inserted into the inside of each sliding sleeve. A pull ring is fixedly installed at the end of each of the two sliding rods that are far apart from each other. A pressure plate is fixedly installed at the end of each of the two sliding rods that are close to each other. A clip is fixedly installed on the side of each of the two pressure plates that are close to each other. The two clips are inserted into the inside of two clip holes.

[0008] Preferably, each slide rod is fitted with a return spring, and the two ends of the two return springs are respectively fixedly connected to the slide sleeve and the pressure plate.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: In use, the operator pulls the two pull rings, causing the two slide rods to move in opposite directions. When the two slide rods move in opposite directions, they both drive the two clamps out of the clamp holes through the pressure plate, and simultaneously squeeze the return spring. Then the operator pulls the two clamp rods to move. When the two clamp rods move, they both drive the two sleeves to move through the support arm. When the two sleeves move, they will drive the two insert rods to move into the two sleeves through the two fixed plates, and compress the two telescopic springs through the two pushing plates, thereby reducing the stroke of the right bellows.

[0010] When the stroke is adjusted to the correct position, the operator releases the two pull rings, which, under the elastic force of the two return springs, pushes the two pressure plates. This causes the two pressure plates to move the two clamps and engage with the two clamp holes for locking, ensuring the stability of the stroke adjustment. This allows the expansion joint to adjust the axial stroke of the pipeline according to usage requirements, preventing damage caused by excessive axial displacement of the pipeline and extending the service life of the pipeline. Attached Figure Description

[0011] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0012] In the attached diagram:

[0013] Figure 1 This is a schematic diagram of the steam pressure balancing expansion joint structure for the steam pipeline of a ship turbine according to this utility model. Figure 1 ;

[0014] Figure 2 This is a schematic diagram of the novel internal structure of the utility sleeve;

[0015] Figure 3 This is a schematic diagram of the steam pressure balancing expansion joint structure for the steam pipeline of a ship turbine according to this utility model. Figure 2 ;

[0016] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0017] Figure 5 This is a schematic diagram of the snap-fit ​​assembly structure of this utility model;

[0018] In the diagram: 1. Mounting ring; 2. Left bellows; 3. Right bellows; 4. First connector; 5. Second connector; 6. Left support; 7. Sleeve; 8. Connector; 9. Insert rod; 10. Fixing plate; 11. Right support; 12. Sleeve plate; 13. Telescopic spring; 14. Mounting block; 15. Mounting frame; 16. Push plate; 17. Support arm; 18. Limiting strip; 19. Locking hole; 20. Limiting groove; 21. Sliding sleeve; 22. Sliding rod; 23. Pressure plate; 24. Locking head; 25. Pull ring; 26. Return spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] Depend on Figures 1 to 5 The present invention includes a mounting ring 1. A left corrugated pipe 2 is fixedly mounted on one side of the mounting ring 1, and a right corrugated pipe 3 is fixedly mounted on the other side of the mounting ring 1. A first pair of connectors 4 are fixedly mounted on the end of the left corrugated pipe 2 away from the mounting ring 1, and a second pair of connectors 5 are fixedly mounted on the end of the right corrugated pipe 3 away from the mounting ring 1. Two left support seats 6 are symmetrically fixedly mounted on the surface of the first pair of connectors 4. A sleeve 7 is fixedly mounted on one side of each left support seat 6. A rod 9 is inserted into one end of each sleeve 7. The lower part of the sleeve 7 away from the left support seat 6 is fixedly connected to the top of the mounting ring 1 through a connector 8. A right support seat 11 is fixedly mounted on one end of each rod 9. The bottom of each right support seat 11 is connected to the second pair of connectors 5. The top of the connector 5 is fixedly connected, and the other end of the plug rod 9 is fixedly installed with a push plate 16. The two push plates 16 are respectively installed inside the two sleeves 7. The sleeves 7 are provided with a telescopic spring 13. The two ends of the two telescopic springs 13 are respectively fixedly connected to the inner wall of one end of the sleeve 7 and the push plate 16. The surface of the two plug rods 9 is fixedly installed with a fixing plate 10. The two fixing plates 10 are provided with a sleeve plate 12 on one side. The two sleeve plates 12 are movably sleeved on the surface of the two plug rods 9. The ends of the two sleeves 7 that are far apart from each other are fixedly installed with a mounting frame 15 through a mounting block 14. The two mounting frames 15 are provided with a snap-fit ​​component for limiting the position of the two sleeve plates 12.

[0021] In use, the operator adjusts the locking assembly to unlock it, and then adjusts the movement of the two sleeves 12. When the two sleeves 12 move, they will drive the two insert rods 9 to move into the two sleeves 7 through the two fixed plates 10, and compress the two telescopic springs 13 through the two pushing plates 16, thereby reducing the stroke of the right bellows 3.

[0022] When the stroke is adjusted to the correct position, the operator adjusts the locking assembly to ensure the stability of the stroke adjustment. This allows the expansion joint to adjust the axial stroke of the pipeline according to usage requirements, avoiding damage caused by excessive axial displacement of the pipeline and improving the service life of the pipeline.

[0023] The snap-fit ​​assembly includes two support arms 17, which are fixedly installed on the opposite sides of the two sleeves 12. Each of the two support arms 17 has a limit strip 18 fixedly installed at one end. The two limit strips 18 are inserted into the interior of the two mounting frames 15. Each of the two mounting frames 15 has a limit groove 20. The two limit strips 18 are slidably installed inside the two limit grooves 20. Each of the opposite sides of the two limit strips 18 has several snap holes 19 at equal intervals.

[0024] Sliding sleeves 21 are fixedly installed on the opposite sides of the two mounting frames 15. Sliding rods 22 are inserted inside the sliding sleeves 21. Pull rings 25 are fixedly installed at the opposite ends of the two sliding rods 22. Pressure plates 23 are fixedly installed at the opposite ends of the two sliding rods 22. Clips 24 are fixedly installed on the opposite sides of the two pressure plates 23. The clips 24 are inserted into the two clip holes 19. Return springs 26 are sleeved on the surface of the sliding rods 22. The two ends of the two return springs 26 are fixedly connected to the sliding sleeves 21 and the pressure plates 23 respectively.

[0025] In use, the operator pulls the two pull rings 25, causing the two slide rods 22 to move in opposite directions. When the two slide rods 22 move in opposite directions, they both drive the two locking heads 24 out of the locking hole 19 through the pressure plate 23, and simultaneously squeeze the return spring 26, thereby releasing the lock. Then the operator pulls the two locking rods 18 to move. When the two locking rods 18 move, they both drive the two sleeves 12 to move through the support arm 17 to adjust the stroke.

[0026] When the stroke is adjusted to the correct position, the operator releases the two pull rings 25, which in turn pushes the two pressure plates 23 under the elastic force of the two return springs 26. This causes the two pressure plates 23 to move the two locking heads 24 and lock them into the two locking holes 19, thus ensuring the stability of the stroke adjustment.

Claims

1. A steam pressure balancing expansion joint for a steam pipeline of a ship's steam turbine, comprising an installation ring (1), characterized in that: A left corrugated pipe (2) is fixedly installed on one side of the mounting ring (1), and a right corrugated pipe (3) is fixedly installed on the other side of the mounting ring (1). A first joint (4) is fixedly installed at the end of the left corrugated pipe (2) away from the mounting ring (1), and a second joint (5) is fixedly installed at the end of the right corrugated pipe (3) away from the mounting ring (1). Two left support seats (6) are symmetrically fixedly installed on the surface of the first joint (4). A sleeve (7) is fixedly installed on one side of each left support seat (6). A rod (9) is inserted into one end of each sleeve (7). The lower part of the sleeve (7) away from the left support seat (6) is fixedly connected to the top of the mounting ring (1) through a connector (8). A right support seat (11) is fixedly installed at one end of each rod (9). The bottom of the right support seat (11) is connected to the second joint (5). The top of the two insert rods (9) is fixedly connected, and the other end of each insert rod (9) is fixedly installed with a push plate (16). The two push plates (16) are respectively installed inside the two sleeves (7). The sleeves (7) are provided with telescopic springs (13). The two ends of the two telescopic springs (13) are respectively fixedly connected to the inner wall of one end of the sleeve (7) and the push plate (16). The surface of each insert rod (9) is fixedly installed with a fixing plate (10). The side of each fixing plate (10) is provided with a sleeve plate (12). The two sleeve plates (12) are movably sleeved on the surface of the two insert rods (9). The ends of the two sleeves (7) that are far apart from each other are fixedly installed with a mounting frame (15) through a mounting block (14). The inside of the two mounting frames (15) is provided with a snap-fit ​​component for limiting the position of the two sleeve plates (12).

2. The steam pressure balancing expansion joint for a ship turbine steam pipeline according to claim 1, characterized in that: The snap-fit ​​assembly includes two support arms (17), which are fixedly installed on the opposite side of the two sleeves (12). Each of the two support arms (17) has a limit strip (18) fixedly installed at one end. The two limit strips (18) are inserted into the interior of the two mounting frames (15). Each of the two mounting frames (15) has a limit groove (20) inside. The two limit strips (18) are slidably installed inside the two limit grooves (20). Each of the opposite sides of the two limit strips (18) has several snap holes (19) at equal intervals.

3. The steam pressure balancing expansion joint for a ship turbine steam pipeline according to claim 2, characterized in that: Sliding sleeves (21) are fixedly installed on the opposite sides of the two mounting frames (15). Sliding rods (22) are inserted inside the sliding sleeves (21). Pull rings (25) are fixedly installed at the opposite ends of the two sliding rods (22). Pressure plates (23) are fixedly installed at the opposite ends of the two sliding rods (22). Clips (24) are fixedly installed on the opposite sides of the two pressure plates (23). The clips (24) are inserted into the two clip holes (19).

4. The steam pressure balancing expansion joint for a ship turbine steam pipeline according to claim 3, characterized in that: The surface of each slide rod (22) is fitted with a return spring (26), and the two ends of the two return springs (26) are respectively fixedly connected to the slide sleeve (21) and the pressure plate (23).

Images