A support structure for heat exchanger tube bundles in a nuclear power plant

Abstract

The present application relates to heat exchanger technical field, the perforation is set up in the surface of support plate, the surface of perforation is provided with buffer plate, the surface of buffer plate is provided with rubber column;Fin, be located in the surface of heat exchange pipe, one end of heat exchange pipe passes through the perforation, and one end of fin is in contact with rubber column;Beneficial effect is that: the vibration produced by heat exchange pipe, first through buffer plate preliminary buffering, and fin is located in the heat dissipation groove, the through hole is through with heat dissipation groove, even if the surface of heat exchange pipe is in contact with the buffer plate in the limiting groove, but does not affect the heat dissipation of heat exchange pipe;Secondly under the action of elastic plate, elastic plate always plays a buffering support effect between buffer plate and support plate;Finally, the clamping plate is slidably connected in the clamping groove, under the action of damping convex, the vibration produced by heat exchange pipe is best buffered, avoids the cracking damage of heat exchange pipe due to the high shell flow rate, and constantly hits the edge of perforation.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, specifically to a tube bundle support structure for a nuclear power plant heat exchanger. Background Technology

[0002] Inside the nuclear island of a nuclear power plant, there are a large number of shell-and-tube heat exchangers that perform the safety function of discharging heat from the nuclear island. When the fluid velocity on the shell side of the shell-and-tube heat exchanger is high, in order to prevent the tube bundle from being damaged by flow-induced vibration, a tube bundle support structure is generally required along the length of the tube bundle.

[0003] In the prior art, the support structure is a support plate, which is generally cut from a thin circular plate. A circular hole slightly larger than the outer diameter of the heat exchange tube is opened in the middle of the circular plate at the corresponding position of the heat exchange tube bundle. When the heat exchanger is assembled, the heat exchange tube passes through these small circular holes, thereby constraining the heat exchange tube and preventing flow-induced vibration.

[0004] However, during the actual operation of the heat exchange tube, if the shell velocity is high, the heat exchange tube will continuously impact the edge of the support plate hole, forming a "severe cutting" effect, causing the tube wall to continuously thin and eventually crack and fail due to excessive stress. Summary of the Invention

[0005] The purpose of this invention is to provide a support structure for heat exchanger tube bundles in nuclear power plants to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a heat exchanger tube bundle support structure for a nuclear power plant, wherein the heat exchanger tube bundle support structure for a nuclear power plant comprises:

[0007] The heat exchanger has a tube sheet on its surface, heat exchange tubes on its surface, and a support plate inside the heat exchanger.

[0008] Perforations are made on the surface of the support plate, and a buffer plate is provided on the surface of the perforations. Rubber columns are provided on the surface of the buffer plate.

[0009] Fins are provided on the surface of the heat exchange tube, one end of the heat exchange tube passes through the perforation, and one end of the fins contacts the rubber column.

[0010] Preferably, the support plate has a circular plate structure, and the surface of the perforation has a limiting groove. There are multiple sets of limiting grooves, which are arranged in a circumferential array about the center of the perforation. There are also multiple sets of perforations, which are evenly distributed.

[0011] Preferably, the buffer plate has an arc-shaped plate structure, and multiple sets of rubber columns are provided. The multiple sets of rubber columns are arranged in a circular array about the center of the buffer plate. Through holes are opened on the surface of the rubber columns, and heat dissipation grooves are opened on the surface of the rubber columns. The heat dissipation grooves have an arc-shaped groove structure, and multiple sets of heat dissipation grooves are provided. The multiple sets of heat dissipation grooves are distributed at equal distances and of equal size, and the through holes are connected to the heat dissipation grooves.

[0012] Preferably, the surface of the buffer plate is provided with an auxiliary plate, which has a "T" shaped plate structure. The surface of the auxiliary plate is provided with soft pads, and there are two sets of soft pads. The two sets of soft pads are symmetrically distributed about the center of the auxiliary plate, and the surface of the auxiliary plate is provided with a slot.

[0013] Preferably, the card slot has a square slot structure, and there are two sets of card slots. Each set of card slots includes multiple card slots, which are distributed at equal distances and of equal size. The two sets of card slots are symmetrically distributed about the center of the auxiliary plate, and the surface of the card slots is provided with damping protrusions.

[0014] Preferably, a card plate is slidably connected to the surface of the card slot, a fixing plate is integrally formed on the surface of the card plate, a top plate is integrally formed on the surface of the fixing plate, and one end of the top plate contacts the soft pad. An elastic plate is provided on the surface of the fixing plate. The elastic plate has an arc-shaped plate structure. Two sets of elastic plates are provided. The two sets of elastic plates are symmetrically distributed about the center of the auxiliary plate, and one end of the elastic plate is located in the sliding groove. The sliding groove is opened on the surface of the buffer plate. Two sets of buffer plates are provided. The two sets of buffer plates are symmetrically distributed about the center of the perforation.

[0015] Preferably, the surface of the fixing plate is provided with a rubber plate, the rubber plate is located on the surface of the limiting groove, and the heat exchange tube is in contact with the rubber column, with one end of the fin passing through the heat dissipation groove.

[0016] Preferably, the surface of the support plate is provided with a rotating groove and a guide groove. The rotating groove has an annular groove structure and the guide groove has an arc-shaped groove structure. The rotating groove and the guide groove are connected. A fixing ring is provided on the surface of the rotating groove, and a baffle is provided on the surface of the fixing ring. The baffle has an "L"-shaped plate structure and multiple sets of baffles are provided. The baffle contacts the groove opening of the limiting groove. A spring pin is inserted into the surface of the rotating groove, and one end of the spring pin is located on the surface of the rotating groove.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention proposes a support structure for heat exchanger tube bundles in nuclear power plants. During normal operation of the heat exchanger tubes, the vibrations generated by the tubes are initially buffered by a buffer plate. The fins are located within the heat dissipation groove, and the through holes are connected to the heat dissipation groove. Even if the surface of the heat exchanger tube is in contact with the buffer plate in the limiting groove, it does not affect the heat dissipation of the heat exchanger tube. Secondly, under the action of the elastic plate, the elastic plate always plays a buffering and supporting role between the buffer plate and the support plate. Finally, the clamping plate is slidably connected in the clamping groove. Under the action of the damping protrusion, it plays the best buffering role against the vibrations generated by the heat exchanger tube, avoiding cracking and damage to the heat exchanger tube due to the high flow velocity in the shell and the continuous impact on the perforation edge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure at the rotating groove of the present invention;

[0021] Figure 3 This is a schematic diagram of the heat exchanger tube structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the perforation structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the overall structure of the fixing plate of the present invention;

[0024] Figure 6 This is a schematic diagram of the auxiliary plate structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the buffer plate structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the connection structure between the heat exchange tube and the support plate of the present invention;

[0027] Figure 9 for Figure 8 Enlarged diagram of point A in the middle.

[0028] In the diagram: 1. Heat exchanger; 2. Tube sheet; 3. Support plate; 4. Heat exchange tube; 5. Perforation; 6. Limiting groove; 7. Fixing plate; 8. Top plate; 9. Clamping plate; 10. Elastic plate; 11. Auxiliary plate; 12. Soft pad; 13. Clamping groove; 14. Damping protrusion; 15. Buffer plate; 16. Sliding groove; 17. Rubber column; 18. Through hole; 19. Heat dissipation groove; 20. Fin; 21. Rotation groove; 22. Guide groove; 23. Baffle; 24. Rubber plate; 25. Fixing ring. Detailed Implementation

[0029] 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.

[0030] Example 1

[0031] Please refer to Figure 1 for heat exchanger. Figure 9 The present invention provides a technical solution: a heat exchanger 1, a tube sheet 2 is provided on the surface of the heat exchanger 1, heat exchange tubes 4 are provided on the surface of the tube sheet 2, and a support plate 3 is provided inside the heat exchanger 1; a perforation 5 is formed on the surface of the support plate 3, a buffer plate 15 is provided on the surface of the perforation 5, and a rubber column 17 is provided on the surface of the buffer plate 15; fins 20 are provided on the surface of the heat exchange tubes 4, one end of the heat exchange tubes 4 passes through the perforation 5, and one end of the fins 20 contacts the rubber column 17;

[0032] During normal operation of the heat exchange tube 4, the vibration generated by the heat exchange tube 4 is first initially buffered by the buffer plate 15. The fins 20 are located in the heat dissipation groove 19, and the through hole 18 is connected to the heat dissipation groove 19. Even if the surface of the heat exchange tube 4 is in contact with the buffer plate 15 in the limiting groove 6, it does not affect the heat dissipation of the heat exchange tube 4. Secondly, under the action of the elastic plate 10, the elastic plate 10 always plays a buffering and supporting role between the buffer plate 15 and the support plate 3. Finally, the clamping plate 9 is slidably connected in the clamping groove 13. Under the action of the damping protrusion 14, it plays the best buffering role against the vibration generated by the heat exchange tube 4, and avoids the heat exchange tube 4 from cracking and being damaged due to the high shell flow velocity and continuous impact on the edge of the perforation 5.

[0033] Example 2

[0034] Based on Embodiment 1, in order to fix the buffer plate 15, the support plate 3 has a circular plate structure. Limiting grooves 6 are formed on the surface of the perforations 5. Multiple sets of limiting grooves 6 are arranged in a circular array about the center of the perforations 5. Multiple sets of perforations 5 are evenly distributed. The buffer plate 15 has an arc-shaped plate structure. Multiple sets of rubber pillars 17 are arranged in a circular array about the center of the buffer plate 15. Through holes 18 are formed on the surface of the rubber pillars 17, and heat dissipation grooves 19 are formed on the surface of the rubber pillars 17. The heat dissipation grooves 19 have an arc-shaped groove structure. Multiple sets of heat dissipation grooves 19 are evenly spaced and of equal size. The through holes 18 communicate with the heat dissipation grooves 19. An auxiliary plate 11 is provided on the surface of the buffer plate 15. The auxiliary plate 11 has a "T"-shaped plate structure. The surface of the auxiliary plate 11 is provided with soft pads 12. There are two sets of soft pads 12, which are symmetrically distributed about the center of the auxiliary plate 11. The surface of the auxiliary plate 11 is provided with slots 13. The two sets of buffer plates 15 are sleeved on the surface of the heat exchange tube 4, and one end of the fin 20 is located in the heat dissipation groove 19. Then the heat exchange tube 4 is inserted into the perforation 5, and the rubber plate 24 is pushed along the limiting groove 6. Under the compression of the limiting groove 6, the rubber pillars 17 on the surface of the buffer plate 15 are tightly attached to each other. After the buffer plate 15 is installed, the rotating groove 21 is rotated to drive the baffle 23 to move along the guide groove 22. The baffle 23 blocks the limiting groove 6, which limits the rubber plate 24 located in the limiting groove 6, that is, limits the entire rubber plate 24.

[0035] Example 3

[0036] Based on Embodiment 2, to prevent the heat exchange tube 4 from being damaged by impact, the slot 13 has a square slot structure. Two sets of slots 13 are provided, each set including multiple slots 13, which are distributed at equal intervals and of equal size. The two sets of slots 13 are symmetrically distributed about the center of the auxiliary plate 11. Damping protrusions 14 are provided on the surface of the slots 13. A retaining plate 9 is slidably connected to the surface of the slots 13. A fixing plate 7 is integrally formed on the surface of the retaining plate 9. A top plate 8 is integrally formed on the surface of the fixing plate 7, with one end of the top plate 8 contacting the soft pad 12. The surface of the fixing plate 7 is provided with… The elastic plate 10 has an arc-shaped plate structure. Two sets of elastic plates 10 are provided, symmetrically distributed about the center of the auxiliary plate 11. One end of the elastic plate 10 is located in the sliding groove 16, which is opened on the surface of the buffer plate 15. Two sets of buffer plates 15 are provided, symmetrically distributed about the center of the perforation 5. A rubber plate 24 is provided on the surface of the fixing plate 7, located on the surface of the limiting groove 6, and the heat exchange tube 4 is in contact with the rubber column 17. One end of the fin 20 passes through the heat dissipation groove 19. A rotation groove is opened on the surface of the support plate 3. Rotating groove 21 and guide groove 22 are connected. Rotating groove 21 has an annular groove structure, and guide groove 22 has an arc-shaped groove structure. A fixing ring 25 is provided on the surface of rotating groove 21, and a baffle 23 is provided on the surface of fixing ring 25. The baffle 23 has an "L"-shaped plate structure, and multiple sets of baffles 23 are provided. The baffle 23 contacts the opening of the limiting groove 6. A spring pin is inserted into the surface of rotating groove 21, with one end of the spring pin located on the surface of rotating groove 21. During normal operation of heat exchange tube 4, the vibration generated by heat exchange tube 4 is first absorbed through buffer plate 15. The heat exchange tube 4 is initially buffered, and the fins 20 are located in the heat dissipation groove 19. The through hole 18 is connected to the heat dissipation groove 19. Even if the surface of the heat exchange tube 4 is in contact with the buffer plate 15 in the limiting groove 6, it does not affect the heat dissipation of the heat exchange tube 4. Secondly, under the action of the elastic plate 10, the elastic plate 10 always plays a buffering and supporting role between the buffer plate 15 and the support plate 3. Finally, the clamping plate 9 is slidably connected in the clamping groove 13. Under the action of the damping protrusion 14, it plays the best buffering role against the vibration generated by the heat exchange tube 4, and avoids the heat exchange tube 4 from cracking and being damaged due to the high shell flow velocity and continuous impact on the edge of the perforation 5.

[0037] In actual use, two sets of buffer plates 15 are fitted onto the surface of the heat exchange tube 4, with one end of the fin 20 located inside the heat dissipation groove 19. The heat exchange tube 4 is then inserted into the perforation 5, and the rubber plate 24 is pushed along the limiting groove 6. Under the pressure of the limiting groove 6, the rubber pillars 17 on the surface of the buffer plate 15 are tightly pressed together. After the buffer plate 15 is installed, the rotating groove 21 is rotated to drive the baffle 23 to move along the guide groove 22, and the baffle 23 blocks the limiting groove 6, thus limiting the rubber plate 24 located in the limiting groove 6, that is, limiting the entire rubber plate 24.

[0038] During normal operation of the heat exchange tube 4, the vibration generated by the heat exchange tube 4 is first initially buffered by the buffer plate 15. The fins 20 are located in the heat dissipation groove 19, and the through hole 18 is connected to the heat dissipation groove 19. Even if the surface of the heat exchange tube 4 is in contact with the buffer plate 15 in the limiting groove 6, it does not affect the heat dissipation of the heat exchange tube 4. Secondly, under the action of the elastic plate 10, the elastic plate 10 always plays a buffering and supporting role between the buffer plate 15 and the support plate 3. Finally, the clamping plate 9 is slidably connected in the clamping groove 13. Under the action of the damping protrusion 14, it plays the best buffering role against the vibration generated by the heat exchange tube 4, and avoids the heat exchange tube 4 from cracking and being damaged due to the high shell flow velocity and continuous impact on the edge of the perforation 5.

[0039] 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 nuclear power plant heat exchanger tube bundle support structure, characterized by: The nuclear power plant heat exchanger tube bundle support structure comprises: The heat exchanger (1) is provided with a tube plate (2) on the surface, the tube plate (2) is provided with a heat exchange tube (4) on the surface, and the heat exchanger (1) is provided with a support plate (3) inside; The perforation (5) is provided on the surface of the support plate (3), the surface of the perforation (5) is provided with a buffer plate (15), and the surface of the buffer plate (15) is provided with a rubber column (17); The fin (20) is arranged on the surface of the heat exchange tube (4), one end of the heat exchange tube (4) penetrates the perforation (5), and one end of the fin (20) is in contact with the rubber column (17); the buffer plate (15) is in the form of an arc-shaped plate structure, the rubber column (17) is provided in multiple groups, the multiple groups of rubber columns (17) are arranged in a circumferential array about the center of the buffer plate (15), the surface of the rubber column (17) is provided with a through hole (18), and the surface of the rubber column (17) is provided with a heat dissipation groove (19) in the form of an arc-shaped groove structure, the heat dissipation groove (19) is provided in multiple groups, and the multiple groups of heat dissipation grooves (19) are arranged at equal distances and have equal sizes, and the through hole (18) and the heat dissipation groove (19) are through.

2. A heat exchanger tube bundle support structure for a nuclear power plant according to claim 1, wherein: The support plate (3) is in the form of a circular plate structure, the surface of the perforation (5) is provided with a limiting groove (6), the limiting groove (6) is provided in multiple groups, the multiple groups of limiting grooves (6) are arranged in a circumferential array about the center of the perforation (5), and the perforation (5) is provided in multiple groups, and the multiple groups of perforations (5) are uniformly distributed.

3. A heat exchanger tube bundle support structure for a nuclear power plant according to claim 1, wherein: The surface of the buffer plate (15) is provided with an auxiliary plate (11), the auxiliary plate (11) is in the form of a "T"-shaped plate structure, the surface of the auxiliary plate (11) is provided with a soft pad (12), the soft pad (12) is provided in two groups, the two groups of soft pads (12) are symmetrically distributed about the center of the auxiliary plate (11), and the surface of the auxiliary plate (11) is provided with a clamping groove (13).

4. A nuclear power plant heat exchanger tube bundle support structure according to claim 3, wherein: The clamping groove (13) is in the form of a square groove structure, the clamping groove (13) is provided in two groups, one group of clamping grooves (13) comprises multiple clamping grooves (13), the multiple clamping grooves (13) are arranged at equal distances and have equal sizes, the two groups of clamping grooves (13) are symmetrically distributed about the center of the auxiliary plate (11), and the surface of the clamping groove (13) is provided with a damping protrusion (14).

5. A nuclear power plant heat exchanger tube bundle support structure according to claim 4, wherein: The surface of the clamping groove (13) is slidably connected with a clamping plate (9), the surface of the clamping plate (9) is integrally formed with a fixing plate (7), the surface of the fixing plate (7) is integrally formed with a top plate (8), one end of the top plate (8) is in contact with the soft pad (12), the surface of the fixing plate (7) is provided with an elastic plate (10), the elastic plate (10) is in the form of an arc-shaped plate structure, the elastic plate (10) is provided in two groups, the two groups of elastic plates (10) are symmetrically distributed about the center of the auxiliary plate (11), one end of the elastic plate (10) is located in a sliding groove (16), the sliding groove (16) is provided on the surface of the buffer plate (15), the buffer plate (15) is provided in two groups, and the two groups of buffer plates (15) are symmetrically distributed about the center of the perforation (5).

6. A nuclear power plant heat exchanger tube bundle support structure according to claim 5, wherein: The surface of the fixing plate (7) is provided with a rubber plate (24), the rubber plate (24) is located on the surface of the limiting groove (6), the heat exchange tube (4) is in contact with the rubber column (17), and one end of the fin (20) penetrates the heat dissipation groove (19).

7. A nuclear power plant heat exchanger tube bundle support structure according to claim 6, wherein: The surface of the support plate (3) is provided with a rotating groove (21) and a guide groove (22), the rotating groove (21) is in the form of an annular groove body structure, the guide groove (22) is in the form of an arc groove body structure, and the rotating groove (21) and the guide groove (22) are through, the surface of the rotating groove (21) is provided with a fixing ring (25), the surface of the fixing ring (25) is provided with a baffle (23), the baffle (23) is in the form of an "L" shaped plate structure, the baffle (23) is provided with a plurality of groups, the baffle (23) is in contact with the slot opening of the limiting groove (6), the rotating groove (21) is inserted with a spring plug, and one end of the spring plug is located on the surface of the rotating groove (21).

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