Reheater pipeline connecting structure

Abstract

The utility model relates to a reheater pipeline connecting structure, and belongs to the technical field of reheaters, the reheater pipeline connecting structure comprises a collecting box, a pipe bundle, a spiral pipe and a connecting pipe, first connecting blocks are fixedly arranged at the ends, outside the collecting box, of the pipe bundle and the spiral pipe, first inserting grooves are formed in the first connecting blocks, and through grooves are formed in the bottom walls, in the first inserting grooves, of the first connecting blocks; the through groove is communicated with the tube bundle or the spiral tube, the connecting tube is matched with the first inserting groove in an inserted mode, the two ends of the connecting tube are sleeved with second connecting blocks, the second connecting blocks are fixedly connected with the connecting tube, the first connecting blocks are provided with second inserting grooves in a penetrating mode, and inserting rods are fixedly arranged on one sides of the second connecting blocks and matched with the second inserting grooves in an inserted mode. A clamping groove is formed in the side wall of the end, away from the second connecting block, of the inserting rod, and a clamping assembly capable of being fixedly clamped to the inserting rod is arranged on the side, away from the first inserting groove, of the first connecting block.

Description

Technical Field

[0001] This application relates to the technical field of reheaters, and in particular to a reheater piping connection structure. Background Technology

[0002] The main purpose of a reheater is to reheat the low-temperature steam discharged from the high-pressure cylinder of a steam turbine, raising its temperature to near that of fresh steam, thereby improving the steam's work capacity and enabling the medium and low-pressure cylinders to output power more efficiently.

[0003] The existing reheater mainly consists of a header and tube bundles. Heating elements are installed inside the header, and multiple tube bundles are evenly distributed within the header, with both ends penetrating the upper and lower walls of the header and fixedly connected. An exhaust pipe is located in the middle of the top wall of the header, penetrating the header and fixedly connected. In addition, multiple coiled tubes are arranged in a spiral pattern at the top of the header, one end of which is connected to the exhaust pipe, and the other end penetrates the top wall of the header and is fixedly connected to the header. Connecting pipes are bolted to the exposed ends of the coiled tubes, with the end of the connecting pipe furthest from the coiled tubes bolted to the upper end of the tube bundles, corresponding one-to-one. During operation, steam enters from one end of the tube bundles, and the heating elements raise the temperature inside the header. The heat energy initially heats the steam through the tube bundles. The heated steam then enters the coiled tubes through the connecting pipes, where the heat from the header further heats the steam through the walls of the coiled tubes, bringing it to the set temperature. Finally, the steam flows into the exhaust pipe and is discharged from its top for subsequent use.

[0004] Regarding the aforementioned technologies, when assembling the reheater, the connection pipes and tube bundles or coiled tubes need to be fixed with tools to tighten the bolts, which is time-consuming and labor-intensive, resulting in low assembly efficiency of the reheater. Utility Model Content

[0005] To improve the efficiency of hot gas assembly, this application provides a reheater pipe connection structure.

[0006] The reheater piping connection structure provided in this application adopts the following technical solution:

[0007] A reheater piping connection structure includes a header, a tube bundle, a coiled tube, and a connecting pipe. Both ends of the tube bundle penetrate the upper and lower walls of the header, and the tube bundle is fixedly connected to the header. The coiled tube is coiled at the upper end of the header. An exhaust pipe is fixedly installed in the middle of the upper top wall of the header. One end of the coiled tube is fixedly connected to the exhaust pipe, and the other end of the coiled tube penetrates the upper top wall of the header, and the coiled tube is fixedly connected to the header. A first connecting block is fixedly installed at the end of the tube bundle and the coiled tube outside the header. The first connecting block has a first slot. The connecting block has a through groove on the bottom wall of the first slot, which is connected to the tube bundle or coiled tube. The connecting tube and the first slot are inserted and adapted. The two ends of the connecting tube are fitted with second connecting blocks, which are fixedly connected to the connecting tube. The first connecting block has a second slot through it. A plug rod is fixed on one side of the second connecting block. The plug rod and the second slot are inserted and adapted. A slot is opened on the side wall of the plug rod away from the second connecting block. A snap-fit ​​component is provided on the side of the first connecting block away from the first slot, which can snap and fix the plug rod.

[0008] By adopting the above technical solution, after aligning the insert rod with the second slot, the connecting tube is pushed towards the first connecting block, causing the connecting tube to move the second connecting block. Simultaneously, the insert rod is inserted into the corresponding second slot, while the end of the connecting tube is inserted into the first slot. Subsequently, the insert rod is locked using a snap-fit ​​assembly, completing the fixed connection between the first and second connecting blocks, thereby achieving stable docking of the connecting tube with the tube bundle or coiled tube. No tools are needed to tighten bolts, saving time and improving the efficiency of reheater assembly.

[0009] Optionally, the first connecting block is provided with an annular sealing gasket at the bottom wall of the first slot.

[0010] By adopting the above technical solution, after the snap-fit ​​assembly completes the snap-fit ​​fixing of the plug rod, the end of the connecting tube and the annular sealing gasket are tightly abutted together. The setting of the annular sealing gasket improves the sealing performance of the connection between the connecting tube and the tube bundle or coiled tube.

[0011] Optionally, the snap-fit ​​assembly includes a rotating plate and a guide block. The rotating plate and the first connecting block are rotatably connected. The rotating plate has a first clearance groove through which a tube bundle or coiled tube is opened. The rotating plate also has an arc-shaped groove through which an insertion rod is opened. A connecting rod is fixedly provided on the lower surface of the rotating plate. The guide block and the end of the connecting rod away from the rotating plate are fixedly connected. One side of the guide block is set as an inclined surface. The guide block and the snap-fit ​​groove are snap-fitted and adapted.

[0012] By adopting the above technical solution, when the rotating plate is rotated, the connecting rod moves in a circular motion, driving the guide block to move. The inclined surface of the guide block first contacts the lower side wall of the slot and pushes the insert rod downward, causing the second connecting block and the connecting tube to move synchronously, ensuring that the connecting tube and the annular sealing gasket fit tightly. Subsequently, the inclined surface of the guide block disengages from the slot, and the lower surface of the guide block abuts against the lower side wall of the slot, thereby locking the position of the insert rod, preventing the insert rod from springing back, and achieving a stable engagement.

[0013] Optionally, a rotating rod is fixed to one side of the rotating plate.

[0014] By adopting the above technical solution, the rotating rod is moved, and the rotating rod drives the rotating plate to rotate. The setting of the rotating rod provides convenience for rotating the rotating plate.

[0015] Optionally, a fixing pipe is fixed to one side wall of the first connecting block. The connecting pipe is vertically arranged and a fixing rod is provided at the connecting pipe. The fixing rod passes through the fixing pipe and is slidably connected to the fixing pipe. A fixing groove is opened on the lower surface of the fixing rod and passes through the opposite sides of the fixing rod. The rotating rod and the fixing groove are engaged and adapted.

[0016] By adopting the above technical solution, after the guide block completes the locking and fixing of the insertion rod, the fixing rod is pushed downwards, causing the rotating rod to embed into the fixing groove. The limiting effect of the fixing groove on the rotating rod can effectively prevent the rotating plate from rotating accidentally, thereby enhancing the locking stability of the insertion rod.

[0017] Optionally, a first buckle is provided on one side of the fixing rod, and a snap-fit ​​rod is rotatably connected to the upper end of the fixing rod, with the snap-fit ​​rod and the first buckle engaging and fitting together.

[0018] By adopting the above technical solution, after the rotating rod is embedded in the fixing groove, the locking rod is rotated and locked into the first buckle. The locking rod is not easy to move, which in turn makes the fixing rod not easy to move, thus improving the stability of the locking of the insertion rod.

[0019] Optionally, a limiting plate is sleeved on the lower end of the fixing rod, and the limiting plate and the fixing rod are fixedly connected.

[0020] By adopting the above technical solution, when the fixed rod moves upward, it drives the limiting plate to move. When the limiting plate and the fixed tube come into contact, the limiting plate prevents the fixed rod from moving upward, thus making it difficult for the fixed rod to detach from the connecting tube.

[0021] Optionally, a second buckle is provided on one side of the fixing rod, and the fixing rod and the second buckle are engaged and adapted to each other.

[0022] By adopting the above technical solution, when there is no need for a fixed rod to restrict the rotating rod, the fixed rod is moved upward, and the fixed rod drives the locking rod to move. After the fixed rod moves to the set height, the locking rod is rotated and the locking rod is locked into the second buckle. The second buckle fixes the locking rod, making it difficult for the locking rod to move downward, and thus making it difficult for the fixed rod to move downward, which facilitates the rotation of the rotating rod.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. Align the insert rod with the corresponding second slot, move the connecting tube toward the first connecting block, the connecting tube drives the second connecting block and the insert rod to move, the insert rod is inserted into the second slot, the end of the connecting tube is embedded into the first slot, and then the insert rod is snapped and fixed by the snap-fit ​​assembly, thereby realizing the connection between the connecting tube and the tube bundle or coiled tube. No workers need to use tools to tighten the bolts, saving time and improving the efficiency of reheater assembly.

[0025] 2. By moving the fixed rod, the rotating rod is embedded into the fixed groove, thus locking the fixed rod and making it difficult for the rotating rod to move relative to the first connecting block;

[0026] 3. The setting of the limiting plate makes it difficult for the fixing rod to detach from the fixing tube. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of a reheater pipe connection structure according to an embodiment of this application;

[0028] Figure 2 This is a cross-sectional view of the internal structure of the chassis in the embodiments of this application;

[0029] Figure 3 This is a cross-sectional view of the structure at the first connecting block in the embodiments of this application;

[0030] Figure 4 This is a schematic diagram illustrating the structure of the snap-fit ​​component in the embodiments of this application.

[0031] In the diagram, 1. header; 11. tube bundle; 12. coiled tube; 13. connecting tube; 14. exhaust pipe; 2. first connecting block; 21. first slot; 22. through groove; 23. second slot; 24. annular sealing gasket; 25. fixing tube; 26. first buckle; 27. second buckle; 3. second connecting block; 4. insert rod; 41. slot; 5. snap-fit ​​assembly; 51. rotating plate; 511. first clearance groove; 512. arc groove; 513. connecting rod; 52. guide block; 6. rotating rod; 7. fixing rod; 71. fixing groove; 72. snap-fit ​​rod; 73. limiting plate; 8. heating element. Detailed Implementation

[0032] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0033] This application discloses a reheater piping connection structure.

[0034] refer to Figure 1 A reheater pipe connection structure includes a header 1 and connecting pipes 13. An exhaust pipe 14 is provided in the middle of the top wall of the header 1. Four connecting pipes 13 are provided, and the connecting pipes 13 are bent. The four connecting pipes 13 are evenly distributed above the header 1.

[0035] refer to Figure 2 , Figure 2 and Figure 4 The header 1 is equipped with a heating element 8 for heating the internal temperature of the box. The header 1 is equipped with four tube bundles 11, which are vertically arranged. The two ends of the tube bundles 11 pass through the upper and lower walls of the header 1 respectively. The tube bundles 11 and the header 1 are fixedly connected. The exhaust pipe 14 passes through the upper top wall of the header 1 and is fixedly connected to the header 1. The upper end of the header 1 is equipped with four spiral tubes 12, which are spirally arranged and alternately arranged. The spiral tubes 12 are located inside the header 1. One end of the spiral tube 12 passes through the upper top wall of the header 1 and extends to the outside of the header 1. The spiral tube 12 and the header 1 are fixedly connected. The other end of the spiral tube 12 is fixedly connected to the exhaust pipe 14.

[0036] A first connecting block 2 is fixedly provided at the upper end of the tube bundle 11 and the end of the spiral tube 12 outside the header 1. A first slot 21 is provided at the upper end of the first connecting block 2. The end of the connecting tube 13 is inserted into the first slot 21 for adaptation. A through groove 22 is provided through the bottom wall of the first connecting block 2 in the first slot 21. The through groove 22 is connected to the tube bundle 11 or the spiral tube 12. An annular sealing gasket 24 is provided at the bottom wall of the first connecting block 2 in the first slot 21. In this embodiment, the annular sealing gasket 24 is made of high temperature resistant rubber material and is elastic. A second connecting block 3 is provided at both ends of the connecting tube 13. The second connecting block 3 is fixedly connected to the connecting tube 13. Two second slots 23 are provided through the first connecting block 2. The two second slots 23 are respectively located on opposite sides of the first slot 21. Two insert rods 4 are fixedly provided on the lower surface of the second connecting block 3. The insert rods 4 and the second slots 23 are inserted into each other for adaptation and correspond one-to-one.

[0037] When assembling the reheater, align the insert rod 4 with the second slot 23, move the connecting tube 13 toward the first connecting block 2, the connecting tube 13 drives the second connecting block 3 to move, the second connecting block 3 drives the insert rod 4 to move, the insert rod 4 is inserted into the corresponding second slot 23, and at the same time the end of the connecting tube 13 is inserted into the first slot 21, the end of the connecting tube 13 and the annular sealing gasket 24 are tightly abutted.

[0038] refer to Figure 2 , Figure 2 and Figure 4 The insertion rod 4 has a slot 41 at the end away from the second connecting block 3. The lower surface of the first connecting block 2 is provided with a snap-fit ​​assembly 5 that can snap-fit ​​and fix the insertion rod 4. The snap-fit ​​assembly 5 includes a rotating plate 51 and a guide block 52. The rotating plate 51 is horizontally set and rotatably connected to the first connecting block 2. A first clearance groove 511 for avoiding the tube bundle 11 or the coiled tube 12 is opened through the middle of the rotating plate 51. Two arc-shaped grooves 512 are opened through the side of the rotating plate 51. The two arc-shaped grooves 512 are rotated along the rotating plate 51. The sides of the plate 51 are arranged in sequence, and the insert rod 4 and the arc groove 512 are inserted and matched. The lower surface of the rotating plate 51 is fixed with a connecting rod 513 on one side of the arc groove 512. The connecting rod 513 is set vertically. There are two guide blocks 52. The two guide blocks 52 are fixedly connected to the two connecting rods 513 on the side near the arc groove 512 respectively. The guide block 52 and the slot 41 are matched and matched. One side of the guide block 52 is set as an inclined surface. A rotating rod 6 is fixed on one side of the rotating plate 51. The rotating rod 6 is set horizontally.

[0039] After the insertion rod 4 passes through the second slot 23, it continues to move and passes through the arc-shaped groove 512. The insertion rod 4 and the arc-shaped groove 512 correspond one-to-one. Then, the rotating rod 6 is rotated, causing the rotating plate 51 to rotate. The rotating plate 51 drives the guide block 52 to move through the connecting rod 513. During this process, the inclined surface of the guide block 52 first contacts the lower side wall of the slot 41, pushing the insertion rod 4 downward, causing the insertion rod 4 to drive the second connecting block 3 and the connecting tube 13 to move until the end of the connecting tube 13 is tightly fitted with the annular sealing gasket 24. Next, the inclined surface of the guide block 52 disengages from the lower side wall of the slot 41, and the lower surface of the guide block 52 abuts against the lower side wall of the slot 41. At this time, the rotating rod 6 stops moving, completing the fixation of the insertion rod 4. The first connecting block 2 and the second connecting block 3 are fixed relative to each other, realizing a stable connection between the connecting tube 13 and the tube bundle 11 or the coiled tube 12.

[0040] refer to Figure 2 , Figure 2 and Figure 4 The first connecting block 2 has a fixing tube 25) fixed on both sides. The fixing tube 25) is vertically set and a fixing rod 7 is inserted into the fixing tube 25). The fixing rod 7 and the fixing tube 25) are slidably connected. The lower surface of the fixing rod 7 has a fixing groove 71. The rotating rod 6 and the fixing groove 71 are engaged and matched. The bottom end of the fixing rod 7 is fitted with a limiting plate 73. The limiting plate 73 and the fixing rod 7 are fixedly connected. The upper end of the fixing rod 7 is rotatably connected with a snap-fit ​​rod 72. The length direction of the snap-fit ​​rod 72 is perpendicular to the fixing rod 7. A first buckle 26 and a second buckle 27 are set on one side of the fixing rod 7. The first buckle 26 and the second buckle 27 are both fixedly connected to the first connecting block 2. The snap-fit ​​rod 72 and the first buckle 26 are engaged and matched. The second buckle 27 is located directly above the first buckle 26.

[0041] Before moving the rotating rod 6, move the locking rod 72 upwards. The locking rod 72 drives the fixing rod 7 to move. After the locking rod 72 and the second buckle 27 are at the same height, rotate the locking rod 72 so that the locking rod 72 is locked into the second buckle 27, thus fixing the locking rod 72. The fixing rod 7 is not easy to move downwards. Then move the rotating rod 6. The fixing rod 7 is not easy to affect the movement of the rotating rod 6. After the rotating rod 6 moves to the set position, the fixing of the insertion rod 4 is completed. Rotate the locking rod 72, and the locking rod 72 and the second buckle 27 are disengaged. Then move the locking rod 72 downwards. The locking rod 72 drives the fixing rod 7 to move. The rotating rod 6 is embedded into the fixing groove 71. The fixing groove 71 limits the rotating rod 6, so that the rotating rod 6 is not easy to move relative to the first connecting block 2. Finally, rotate the locking rod 72 so that the locking rod 72 is locked into the first buckle 26, so that the fixing rod 7 is not easy to move upwards, thereby improving the stability of the restriction on the rotating rod 6.

[0042] The implementation principle of a reheater pipe connection structure according to an embodiment of this application is as follows: Align the insert rod 4 with the second slot 23, and move the connecting pipe 13 along the direction of the first connecting block 2. The connecting pipe 13 drives the insert rod 4 to insert into the second slot 23 through the second connecting block 3, and passes through the corresponding arc-shaped groove 512. At the same time, the end of the connecting pipe 13 enters the first slot 21. Then, rotate the rotating rod 6 to drive the rotating plate 51 to rotate. The rotating plate 51 pushes the guide block 52 to move through the connecting rod 513. The inclined surface of the guide block 52 first contacts the lower side wall of the slot 41, pushing the insert rod 4 downward, so that the second connecting block 3 drives the connecting pipe 13 to move until the end of the connecting pipe 13 is tightly fitted with the annular sealing gasket 24. Then, the inclined surface of the guide block 52 disengages from the lower side wall of the slot 41, and the lower surface of the guide block 52 abuts against the lower side wall of the slot 41, completing the fixation of the insert rod 4. At this time, the first connecting block 2 and the second connecting block 3 remain relatively fixed, ensuring that the connecting pipe 13 is firmly connected to the tube bundle 11 or the coiled tube 12. At the same time, the tube bundle 11 and the coiled tube 12 are connected, eliminating the need for workers to tighten bolts with tools, saving time and thus improving the efficiency of reheater assembly.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reheater piping connection structure, comprising a header (1), a tube bundle (11), a coiled tube (12), and a connecting pipe (13), wherein both ends of the tube bundle (11) penetrate the upper and lower walls of the header (1), the tube bundle (11) and the header (1) are fixedly connected, the coiled tube (12) is coiled at the upper end of the header (1), an exhaust pipe (14) is fixedly provided in the middle of the upper top wall of the header (1), one end of the coiled tube (12) is fixedly connected to the exhaust pipe (14), the other end of the coiled tube (12) penetrates the upper top wall of the header (1), and the coiled tube (12) and the header (1) are fixedly connected, characterized in that: The tube bundle (11) and the spiral tube (12) are each fixed with a first connecting block (2) at one end outside the header (1). The first connecting block (2) has a first slot (21). The bottom wall of the first connecting block (2) has a through groove (22). The through groove (22) is connected to the tube bundle (11) or the spiral tube (12). The connecting tube (13) is inserted into and fitted with the first slot (21). The two ends of the connecting tube (13) are fitted with second connecting blocks (3). The second connecting block (3) and the connecting tube (13) are fixedly connected. The first connecting block (2) has a second slot (23) through it. A rod (4) is fixed on one side of the second connecting block (3). The rod (4) is inserted into and adapted to the second slot (23). A slot (41) is opened on the side wall of the rod (4) away from the second connecting block (3). A snap-fit ​​component (5) that can snap-fit ​​and fix the rod (4) is provided on the side of the first connecting block (2) away from the first slot (21).

2. The reheater piping connection structure according to claim 1, characterized in that: The first connecting block (2) has an annular sealing gasket (24) at the bottom wall of the first slot (21).

3. The reheater piping connection structure according to claim 1, characterized in that: The snap-fit ​​assembly (5) includes a rotating plate (51) and a guide block (52). The rotating plate (51) and the first connecting block (2) are rotatably connected. The rotating plate (51) has a first clearance groove (511) for avoiding the tube bundle (11) or the coiled tube (12). The rotating plate (51) has an arc groove (512) for avoiding the insertion rod (4). A connecting rod (513) is fixed on the lower surface of the rotating plate (51). The guide block (52) and the connecting rod (513) are fixedly connected at one end away from the rotating plate (51). One side of the guide block (52) is set as an inclined surface. The guide block (52) and the snap-fit ​​groove (41) are snap-fitted and adapted.

4. The reheater piping connection structure according to claim 3, characterized in that: A rotating rod (6) is fixed on one side of the rotating plate (51).

5. A reheater piping connection structure according to claim 4, characterized in that: A fixing tube (25) is fixed on one side wall of the first connecting block (2), the connecting tube (13) is vertically set, a fixing rod (7) is set at the connecting tube (13), the fixing rod (7) passes through the fixing tube (25), the fixing rod (7) and the fixing tube (25) are slidably connected, a fixing groove (71) is opened on the lower surface of the fixing rod (7), the fixing groove (71) passes through the opposite sides of the fixing rod (7), and the rotating rod (6) and the fixing groove (71) are engaged and adapted.

6. A reheater piping connection structure according to claim 5, characterized in that: A first buckle (26) is provided on one side of the fixing rod (7), and a snap-fit ​​rod (72) is fixed on one side of the upper end of the fixing rod (7). The snap-fit ​​rod (72) and the first buckle (26) are snap-fitted and adapted to each other.

7. A reheater piping connection structure according to claim 5, characterized in that: The lower end of the fixing rod (7) is fitted with a limiting plate (73), and the limiting plate (73) and the fixing rod (7) are fixedly connected.

8. A reheater piping connection structure according to claim 5, characterized in that: A second buckle (27) is provided on one side of the fixing rod (7), and the fixing rod (7) and the second buckle (27) are engaged and adapted to each other.

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