Boiler Karman vortex street vibration reduction partition plate

Abstract

The utility model discloses a Karman vortex street vibration reduction partition plate of a boiler, and relates to the technical field of boiler heating surfaces. Comprising a vibration reduction partition plate body, fixing beams, a first rectangular steel plate, a second rectangular steel plate, a fixing steel pipe, a first fixing block, a second fixing block, a leveling block, a first connecting rod, a second connecting rod, a protective sleeve, a threaded groove and a fixing bolt. A first rectangular steel plate and a second rectangular steel plate are arranged on the vibration reduction partition plate body, and fixing steel pipes are arranged on the first rectangular steel plate and the second rectangular steel plate. According to the Karman vortex street vibration reduction partition plate of the boiler, the Karman vortex street vibration reduction partition plate is vertically installed in the middle of the boiler tube row in multiple columns, the vortex street issuing frequency of the boiler tube row is adjusted while hot smoke air in the boiler flows through the boiler tube row and the fixed steel tube, resonance generated by lateral force generated by the Karman vortex street and fixed vibration of a boiler body is prevented, and safe and efficient operation of the boiler is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler heating surfaces, in particular to a boiler Karman vortex street vibration reduction partition plate. Background Technique

[0002] At present, the flue gas heat exchangers in domestic power plants mainly include tubular heat exchangers and rotary heat exchangers. The tubular heat exchangers are widely used in the power generation field due to their characteristics of safety, reliability, convenient maintenance and long-term continuous operation. The inside of the tubular heat exchanger is mainly composed of heat exchange tube bundles. When media with different flow velocities, different states and different temperatures exist on both sides of the heat exchange surface at the same time, a complex heat exchange process will be formed, and at the same time, a typical Karman vortex street phenomenon will be generated. The alternating release of the rear vortices of the Karman vortex street will generate an alternating lateral force perpendicular to the flow direction on the boiler tube row, forcing the boiler tube row to vibrate. When the release frequency is coupled with the natural frequency of the boiler body structure, resonance will occur, which will cause serious damage. In order to eliminate the resonance caused by the Karman vortex street phenomenon and ensure the safe operation level of the boiler body, a vibration reduction partition plate is installed between the internal tube rows of the boiler.

[0003] The existing vibration reduction partition plates for eliminating the Karman vortex street generally use corrugated plates as the main component and are inserted between the boiler tube rows. Due to the small gap between the tube rows, they need to be installed during the installation of the boiler body. However, during later maintenance, it is impossible to perform maintenance quickly and effectively, which increases the labor intensity of personnel and raises the equipment maintenance cost.

[0004] For the existing tubular heat exchanger type boilers, since the inside of the boiler has already been formed, the operating space inside the boiler is narrow, and the gap between the boiler tube rows is small. Especially for the boiler tube rows arranged perpendicular to the flue gas, it is impossible to use the corrugated plate type vibration reduction partition plate, and the vibration cannot be effectively eliminated, which seriously restricts the safe operation of the boiler and poses relatively serious safety hazards.

[0005] Therefore, we propose a boiler Karman vortex street vibration reduction partition plate to solve the problems raised above. Content of the Utility Model

[0006] The purpose of the utility model is to provide a boiler Karman vortex street vibration reduction partition plate to solve the problem that there is no fixed standard vibration reduction partition plate in the current market. Basically, due to the actual situation of the boiler body, corrugated plates that are relatively difficult to load and unload are used as the main type and are installed during the installation construction of the boiler body. It is impossible to effectively install on the existing boiler body, which seriously restricts the safe and stable operation of the boiler.

[0007] To achieve the above object, the utility model provides the following technical solutions: A boiler Karman vortex street vibration reduction partition plate, including a vibration reduction partition plate body and a first rectangular steel plate. Fixed beams are installed on both the upper and lower sides of the vibration reduction partition plate body, and a first rectangular steel plate and a second rectangular steel plate are arranged on the vibration reduction partition plate body. Fixed steel pipes are arranged on both the first rectangular steel plate and the second rectangular steel plate.

[0008] Preferably, a plurality of fixed beams are provided, and the fixed beams are equidistantly distributed on the vibration reduction partition plate body. Moreover, the vibration reduction partition plate body is convenient for entering through the manhole door.

[0009] With the above structural design, the fixed beams are transversely arranged at the bottom of the upper ventilation beam to the top of the lower ventilation beam of each stage of heat exchanger in the boiler and welded firmly. The upper and lower parts of all vibration reduction partition plate bodies are respectively welded to the fixed beams to improve the stability of the vibration reduction partition plate body.

[0010] Preferably, two and fourteen first rectangular steel plates and second rectangular steel plates are respectively provided. The first rectangular steel plate is 2380*430mm, the second rectangular steel plate is 2380*560mm, and the thickness of both the first rectangular steel plate and the second rectangular steel plate is 4mm. The distance between the first rectangular steel plate and the second rectangular steel plate is 20mm.

[0011] With the above structural design, the first rectangular steel plate and the second rectangular steel plate adopt steel straight plates, which have the advantage of small occupied space. The partition plate can be installed and disassembled at any time, improving the equipment maintenance efficiency, reducing the maintenance cost and the labor intensity of personnel. At the same time, it is applicable to the existing boilers, eliminating the boiler safety hazards and ensuring the safe operation of various types of boilers.

[0012] Preferably, the fixed steel pipes are located at a position 595mm from the bottom of the distance between the first rectangular steel plate and the second rectangular steel plate, and the fixed steel pipes are fixedly welded to the first rectangular steel plate and the second rectangular steel plate.

[0013] With the above structural design, by vertically installing a series in the middle of the boiler tube bank, when the hot flue gas in the boiler flows through the boiler tube bank, the fixed steel pipes, the first rectangular steel plate and the second rectangular steel plate, the vortex street emission frequency of the boiler tube bank is adjusted to prevent the lateral force generated by the Karman vortex street from resonating with the fixed vibration of the boiler body, ensuring the safe and efficient operation of the boiler.

[0014] Preferably, a first fixing block and a second fixing block are respectively installed on both the upper and lower sides of the fixed steel pipe, and a leveling block is arranged inside the fixed steel pipe. Moreover, a threaded groove is opened on the first fixing block.

[0015] With the above structural design, the inner wall of the fixed steel pipe can be leveled by moving the leveling block, preventing the fixed steel pipe from deforming and being difficult to repair.

[0016] Preferably, the upper and lower sides of the leveling block are respectively equipped with a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod respectively form a sliding connection structure with the first fixing block and the second fixing block. The first connecting rod and the second connecting rod are fixedly connected to each other. Moreover, the leveling block is located at the connection position of the first connecting rod and the second connecting rod, and the leveling block is fixedly connected to the first connecting rod and the second connecting rod.

[0017] With the above structural design, the leveling block can be moved by pulling the first connecting rod or the second connecting rod, so that the leveling block levels the inner wall of the fixed steel pipe.

[0018] Preferably, a protective sleeve is installed at the upper end of the first connecting rod, and a fixing bolt is provided on the protective sleeve, and the center line of the fixing bolt coincides with the center line of the threaded groove.

[0019] With the above structural design, when it is not necessary to level the inner wall of the fixed steel pipe, move the protective sleeve on the first connecting rod above the first fixing block and make the protective sleeve close to the first fixing block. Rotate the fixing bolt on the protective sleeve so that the fixing bolt is connected to the threaded groove on the first fixing block, and the fixing of the first connecting rod can be realized, thus completing the fixing of the leveling block on the first connecting rod.

[0020] Compared with the prior art, the beneficial effect of the present utility model is: this boiler Karman vortex street vibration reduction baffle:

[0021] By vertically installing in the middle of the boiler tube bank in several columns, while the internal hot flue gas in the boiler flows through the boiler tube bank and the fixed steel pipe, the vortex street emission frequency of the boiler tube bank is adjusted to prevent the lateral force generated by the Karman vortex street from resonating with the fixed vibration of the boiler body, ensuring the safe and efficient operation of the boiler;

[0022] The use of a boiler Karman vortex street vibration reduction baffle effectively eliminates the resonance phenomenon of the boiler Karman vortex street, reduces the maintenance difficulty and the labor intensity of personnel, ensures the safe and stable operation of the boiler, eliminates potential safety hazards, and at the same time provides an effective basis for the safe and stable operation of the in-service boiler, and can be effectively promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0024] Figure 2 is a schematic diagram of the structure when the protective sleeve of the present utility model is pulled out;

[0025] Figure 3 is a schematic diagram of the structure when the protective sleeve of the present utility model is fixed;

[0026] Figure 4 is a schematic diagram of the positional structure of the first fixing block, the second fixing block and the leveling block of the present utility model;

[0027] Figure 5 This is a schematic diagram of the connection structure between the fixing bolt and the threaded groove of the present utility model.

[0028] In the figure: 1. Vibration reduction partition body; 2. Fixing beam; 3. First rectangular steel plate; 4. Second rectangular steel plate; 5. Fixing steel pipe; 6. First fixing block; 7. Second fixing block; 8. Leveling block; 9. First connecting rod; 10. Second connecting rod; 11. Protective sleeve; 12. Threaded groove; 13. Fixing bolt. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figures 1-5, the present utility model provides a technical solution: a boiler Karman vortex street vibration reduction baffle, including a vibration reduction baffle body 1, fixed beams 2, first rectangular steel plates 3, second rectangular steel plates 4, fixed steel pipes 5, first fixing blocks 6, second fixing blocks 7, leveling blocks 8, first connecting rods 9, second connecting rods 10, protective sleeves 11, threaded grooves 12 and fixing bolts 13. Fixed beams 2 are installed on both the upper and lower sides of the vibration reduction baffle body 1. There are several fixed beams 2, and the fixed beams 2 are evenly distributed on the vibration reduction baffle body 1. Moreover, for the convenience of entering through the manhole door, the fixed beams 2 are transversely arranged from the bottom of the upper ventilation beam to the top of the lower ventilation beam of each stage of heat exchanger in the boiler and are welded firmly. The upper and lower parts of all vibration reduction baffle bodies 1 are respectively welded to the fixed beams 2 to improve the stability of the vibration reduction baffle body 1. And the vibration reduction baffle body 1 is provided with a first rectangular steel plate 3 and a second rectangular steel plate 4. There are two first rectangular steel plates 3 and fourteen second rectangular steel plates 4 respectively. The first rectangular steel plate 3 is 2380*430mm, the second rectangular steel plate 4 is 2380*560mm, and the thickness of the first rectangular steel plate 3 and the second rectangular steel plate 4 is 4mm. The distance between the first rectangular steel plate 3 and the second rectangular steel plate 4 is 20mm. The first rectangular steel plate 3 and the second rectangular steel plate 4 adopt steel straight plates, which have the advantage of small occupied space. The baffle can be installed and disassembled at any time, improving the equipment maintenance efficiency, reducing the maintenance cost and the labor intensity of personnel. At the same time, it is applicable to the existing boilers, eliminating the boiler safety hazards and ensuring the safe operation of various types of boilers. Fixed steel pipes 5 are provided on both the first rectangular steel plate 3 and the second rectangular steel plate 4. The fixed steel pipes 5 are located at a position 595mm from the bottom of the distance between the first rectangular steel plate 3 and the second rectangular steel plate 4, and the fixed steel pipes 5 are welded and fixed to the first rectangular steel plate 3 and the second rectangular steel plate 4. By vertically installing several columns in the middle of the boiler tube row, when the hot flue gas in the boiler flows through the boiler tube row, the fixed steel pipes 5, the first rectangular steel plate 3 and the second rectangular steel plate 4, the vortex street emission frequency of the boiler tube row is adjusted to prevent the lateral force generated by the Karman vortex street from resonating with the fixed vibration of the boiler body, ensuring the safe and efficient operation of the boiler.

[0031] On the upper and lower sides of the fixed steel pipe 5, a first fixing block 6 and a second fixing block 7 are respectively installed. And inside the fixed steel pipe 5, a leveling block 8 is provided. Moreover, a threaded groove 12 is formed in the first fixing block 6. By moving the leveling block 8, the inner wall of the fixed steel pipe 5 can be leveled by the leveling block 8, preventing the fixed steel pipe 5 from deforming and being difficult to repair. On the upper and lower sides of the leveling block 8, a first connecting rod 9 and a second connecting rod 10 are respectively installed. And the first connecting rod 9 and the second connecting rod 10 respectively form a sliding connection structure with the first fixing block 6 and the second fixing block 7. The first connecting rod 9 and the second connecting rod 10 are fixedly connected. Moreover, the leveling block 8 is located at the connecting position of the first connecting rod 9 and the second connecting rod 10. The leveling block 8 is fixedly connected with the first connecting rod 9 and the second connecting rod 10. By pulling the first connecting rod 9 or the second connecting rod 10, the leveling block 8 can be moved, so that the leveling block 8 levels the inner wall of the fixed steel pipe 5. A protective sleeve 11 is installed at the upper end of the first connecting rod 9. And a fixing bolt 13 is provided on the protective sleeve 11. Moreover, the center line of the fixing bolt 13 coincides with the center line of the threaded groove 12. When the inner wall of the fixed steel pipe 5 does not need to be leveled, move the protective sleeve 11 on the first connecting rod 9 above the first fixing block 6 and make the protective sleeve 11 close to the first fixing block 6. Rotate the fixing bolt 13 on the protective sleeve 11 to connect the fixing bolt 13 with the threaded groove 12 on the first fixing block 6, and the fixing of the first connecting rod 9 can be realized, thus completing the fixing of the leveling block 8 on the first connecting rod 9.

[0032] Working principle: When using this boiler Karman vortex street vibration reduction baffle, first, the first rectangular steel plate 3 and the second rectangular steel plate 4 are arranged in a vertical column in the direction perpendicular to the boiler tube bank. To meet the size of the boiler inlet door, the first rectangular steel plate 3 and the second rectangular steel plate 4 are cut into appropriate sizes and spliced and fixed on the boiler ventilation beam. Due to the advantage that the first rectangular steel plate 3 and the second rectangular steel plate 4 adopt steel straight plates and occupy little space, the baffle can be installed and disassembled at any time, improving the equipment maintenance efficiency, reducing the maintenance cost and the labor intensity of personnel. At the same time, it is applicable to the existing boilers, eliminating the boiler safety hazards and ensuring the safe operation of various types of boilers.

[0033] By pulling the first connecting rod 9 or the second connecting rod 10, the leveling block 8 can be moved, so that the leveling block 8 levels the inner wall of the fixed steel pipe 5. When the inner wall of the fixed steel pipe 5 does not need to be leveled, move the protective sleeve 11 on the first connecting rod 9 above the first fixing block 6 and make the protective sleeve 11 close to the first fixing block 6. Rotate the fixing bolt 13 on the protective sleeve 11 to connect the fixing bolt 13 with the threaded groove 12 on the first fixing block 6, and the fixing of the first connecting rod 9 can be realized, thus completing the fixing of the leveling block 8 on the first connecting rod 9.

[0034] Thus, a series of operations are completed. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0035] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A boiler Karman vortex street vibration reduction partition plate, comprising a vibration reduction partition plate body (1) and a first rectangular steel plate (3), characterized in that: Fixed beams (2) are installed on both the upper and lower sides of the vibration reduction partition body (1), and a first rectangular steel plate (3) and a second rectangular steel plate (4) are arranged on the vibration reduction partition body (1). Fixed steel pipes (5) are arranged on both the first rectangular steel plate (3) and the second rectangular steel plate (4).

2. The boiler Karman vortex street vibration reduction partition plate according to claim 1, characterized in that: A number of the fixed beams (2) are provided, and the fixed beams (2) are equally spaced on the vibration reduction partition body (1). Moreover, the vibration reduction partition body (1) is convenient for entering through a manhole door.

3. The boiler Karman vortex street vibration reduction partition plate according to claim 1, characterized in that: Two and fourteen first rectangular steel plates (3) and second rectangular steel plates (4) are respectively provided. The first rectangular steel plate (3) is 2380*430 mm, the second rectangular steel plate (4) is 2380*560 mm, and the thickness of both the first rectangular steel plate (3) and the second rectangular steel plate (4) is 4 mm. The distance between the first rectangular steel plate (3) and the second rectangular steel plate (4) is 20 mm.

4. The boiler Karman vortex street vibration reduction baffle according to claim 1, characterized in that: The fixed steel pipe (5) is located at a position 595 mm from the bottom of the first rectangular steel plate (3) and the second rectangular steel plate (4), and the fixed steel pipe (5) is fixedly welded to the first rectangular steel plate (3) and the second rectangular steel plate (4).

5. The boiler Karman vortex street vibration reduction baffle according to claim 1, characterized in that: A first fixing block (6) and a second fixing block (7) are respectively installed on the upper and lower sides of the fixed steel pipe (5). A leveling block (8) is arranged inside the fixed steel pipe (5). Moreover, a threaded groove (12) is formed in the first fixing block (6).

6. The boiler Karman vortex street vibration reduction baffle according to claim 5, wherein: A first connecting rod (9) and a second connecting rod (10) are respectively installed on the upper and lower sides of the leveling block (8). The first connecting rod (9) and the second connecting rod (10) respectively form a sliding connection structure with the first fixing block (6) and the second fixing block (7). The first connecting rod (9) and the second connecting rod (10) are fixedly connected. Moreover, the leveling block (8) is located at the connection position of the first connecting rod (9) and the second connecting rod (10), and the leveling block (8) is fixedly connected to the first connecting rod (9) and the second connecting rod (10).

7. The boiler Karman vortex street vibration reduction baffle according to claim 6, characterized in that: A protective sleeve (11) is installed at the upper end of the first connecting rod (9). A fixing bolt (13) is arranged on the protective sleeve (11). Moreover, the center line of the fixing bolt (13) coincides with the center line of the threaded groove (12).

Images