Bottom expansion limiting device for two-section type heated module of horizontal waste heat boiler
By using limiting components in a horizontal waste heat boiler to allow the heated module to expand freely within a predetermined direction and length, the problems of jamming and leakage caused by uneven expansion are solved, thereby improving the operational stability and thermal efficiency of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-04-14
AI Technical Summary
In existing technologies, uneven expansion of the two-stage heating modules in horizontal waste heat boilers can lead to jamming and leakage accidents, affecting the stability and safety of equipment operation.
The first and second heating modules are fixed by first and second limiting components respectively, allowing them to expand and contract freely in a predetermined direction and length. A sliding track is provided by the combination structure of the first ear plate, connecting plate and bracket to ensure stable expansion of the module.
It effectively avoids jamming and leakage accidents caused by uneven expansion, reduces heat loss and mechanical stress, improves the operational stability and safety of waste heat boilers, and enhances thermal efficiency and equipment maintainability.
Smart Images
Figure CN224121222U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste heat boiler equipment, and particularly relates to a bottom expansion limiting device for a two-stage heating module of a horizontal waste heat boiler. Background Art
[0002] With the adjustment of the energy structure, gas-steam combined cycle generating units that burn clean energy and achieve low pollution emissions are more and more widely used. As an important part of the combined cycle power generation system, the operation effect of the waste heat boiler directly affects the efficiency of the generating unit. However, the waste heat boiler is extremely prone to vibration during operation, so the anti-vibration fixing device of the heating surface module has become the focus of the waste heat boiler structure design. Taking the horizontal waste heat boiler supporting a 150MW gas turbine unit as an example, after the gas turbine burns at full load, the flue gas exhaust flow rate is 90-120 Nm 3 / h. The flow field of the huge flue gas flow rate is unstable, which causes the tube rows of the heating module of the waste heat boiler to be impacted by the flue gas and generate huge swaying.
[0003] In the prior art, generally only one integral expansion limiting device is used to fix the heating surface module at the bottom of the two-stage heating module. However, due to the different flue gas temperatures of the two groups of heating modules, the expansion amount of the heating module in the high-temperature area is greater than that of the heating surface in the low-temperature area, especially during the start-up and shutdown of the unit, it is easy to cause the expansion limiting device to be stuck and cause leakage accidents. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a bottom expansion limiting device for a two-stage heating module of a horizontal waste heat boiler. The limiting device can enable each heating module to expand and contract in a predetermined direction and length, so as to ensure the free expansion of each heating module.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A bottom expansion limiting device for a two-stage heating module of a horizontal waste heat boiler, characterized in that the waste heat boiler has a first heating module and a second heating module, and the limiting device includes a first limiting component, a second limiting component and a fixing frame. Among them, one end of the first limiting component is connected to the fixing frame, and the other end of the first limiting component is connected to the bottom of the first heating module. The first limiting component can enable the first heating module to expand and contract in a predetermined direction and length; one end of the second limiting component is connected to the fixing frame, and the other end of the second limiting component is connected to the bottom of the second heating module. The second limiting component can enable the second heating module to expand and contract in a predetermined direction and length.
[0007] Furthermore, in the above-mentioned horizontal waste heat boiler two-stage heating module bottom expansion limiting device, the first heating module includes a first pipe bank and a second pipe bank; the first limiting component includes a first ear plate, a first connecting plate, a first bracket and a second bracket, one end of the first ear plate is connected to the fixed frame, the other end of the first ear plate is slidably connected to one end of the first connecting plate, and the axis of the length direction of the first ear plate is parallel to the axis of the length direction of the first connecting plate; the axis of the length direction of the first bracket is perpendicular to the axis of the length direction of the first connecting plate, the lower end of the first bracket is connected to the first connecting plate, and the upper end of the first bracket is connected to the first pipe bank; the lower end of the second bracket is slidably connected to the other end of the first connecting plate, and the upper end of the second bracket is connected to the second pipe bank.
[0008] Furthermore, in the above-mentioned horizontal waste heat boiler two-stage heating module bottom expansion limiting device, two first ear plates are provided, the two first ear plates are arranged in parallel, and the other end of the first ear plate is provided with a first elongated hole. One end of the first connecting plate is located between the two first ear plates, and one end of the first connecting plate is provided with a first pin. The two ends of the first pin respectively pass through the first elongated holes of the two first connecting plates; the first elongated hole provides a sliding track for the first connecting plate to slide freely through the first pin.
[0009] Furthermore, in the above-mentioned horizontal waste heat boiler two-stage heating module bottom expansion limiting device, there are two first brackets, which are respectively located on both sides of the first connecting plate, and the two first brackets are connected to the first connecting plate by second pins.
[0010] Furthermore, in the above-mentioned horizontal waste heat boiler two-stage heating module bottom expansion limiting device, there are two second brackets, which are respectively located on both sides of the first connecting plate; the lower end of the second bracket is provided with a second elongated hole, and the other end of the first connecting plate is provided with a third pin, the two ends of the third pin respectively passing through the second elongated holes of the two second brackets; the second elongated hole provides a sliding track for the second bracket to slide freely through the third pin.
[0011] Furthermore, in the above-mentioned horizontal waste heat boiler two-stage heating module bottom expansion limiting device, the second heating module includes a third pipe bank and a fourth pipe bank. The second limiting component includes a second ear plate, a second connecting plate, a third bracket, and a fourth bracket. One end of the second ear plate is connected to the fixed frame, and the other end of the second ear plate is slidably connected to one end of the second connecting plate. The axis of the second ear plate in the length direction is parallel to the axis of the second connecting plate in the length direction. The lower end of the third bracket is connected to the middle part of the second connecting plate, and the upper end of the third bracket is connected to the third pipe bank. The lower end of the fourth bracket is slidably connected to the other end of the second connecting plate, and the upper end of the fourth bracket is connected to the fourth pipe bank.
[0012] Furthermore, in the above-mentioned horizontal waste heat boiler two-stage heating module bottom expansion limiting device, two second ear plates are provided, the two second ear plates are arranged in parallel, and a third elongated hole is provided at the other end of the second ear plate. One end of the second connecting plate is located between the two second ear plates, and a fourth pin is provided at one end of the second connecting plate. The two ends of the fourth pin respectively pass through the third elongated hole of the two second connecting plates; the third elongated hole provides a sliding track for the second connecting plate to slide freely through the fourth pin.
[0013] Furthermore, in the above-mentioned horizontal waste heat boiler two-stage heating module bottom expansion limiting device, there are two third brackets, which are respectively located on both sides of the second connecting plate, and the two third brackets are connected to the second connecting plate by a fifth pin.
[0014] Furthermore, in the above-mentioned horizontal waste heat boiler two-stage heating module bottom expansion limiting device, there are two fourth brackets, which are respectively located on both sides of the second connecting plate; the lower end of the fourth bracket is provided with a fourth elongated hole, and the other end of the second connecting plate is provided with a sixth pin, the two ends of the sixth pin respectively passing through the fourth elongated holes of the two fourth brackets; the fourth elongated hole provides a sliding track for the fourth bracket to slide freely through the sixth pin.
[0015] Furthermore, in the aforementioned horizontal waste heat boiler two-section heating module bottom expansion limiting device, the fixing frame is a steel structure.
[0016] Analysis reveals that this utility model discloses a bottom expansion limiting device for a two-stage heating module of a horizontal waste heat boiler. This limiting device, by setting a first limiting component for the first heating module and a second limiting group for the second heating module, allows the first and second heating modules to expand freely within a predetermined direction and length. This effectively avoids jamming and leakage accidents caused by uneven expansion, reduces heat loss and mechanical stress due to uneven expansion, thereby improving the operational stability and safety of the waste heat boiler, ensuring its normal operation, increasing energy conversion efficiency, and contributing to energy conservation and emission reduction. This limiting device effectively absorbs the vibration energy brought by flue gas impact, reduces the swaying of the heating surface modules, improves the overall shock resistance of the waste heat boiler, and thus improves its thermal efficiency. This limiting device also has advantages such as simple structure, easy maintenance, and wide applicability, while improving the maintainability and reliability of the equipment, making it highly practical and worthy of promotion. Attached Figure Description
[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:
[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.
[0019] Figure 2 This is a schematic diagram of the structure of the first limiting component according to an embodiment of the present invention.
[0020] Figure 3 This is a top view of the first limiting component according to an embodiment of the present invention.
[0021] Figure 4 This is a schematic diagram of the structure of the second limiting component according to an embodiment of the present invention.
[0022] Explanation of reference numerals in the attached drawings: 1. Fixing bracket; 2. First heating module; 20. First pipe bank; 21. First ear plate; 22. First elongated hole; 23. Second elongated hole; 24. First pin; 25. Second pin; 26. Third pin; 27. First connecting plate; 28. First bracket; 29. Second pipe bank; 30. Second bracket; 4. Second heating module; 40. Third pipe bank; 41. Second ear plate; 42. Third elongated hole; 43. Fourth elongated hole; 44. Fourth pin; 45. Fifth pin; 46. Sixth pin; 47. Second connecting plate; 48. Third bracket; 49. Fourth pipe bank; 50. Fourth bracket. Detailed Implementation
[0023] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.
[0024] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0025] The accompanying drawings illustrate one or more examples of the present invention. The detailed description uses numerals and letters to refer to features in the drawings. Similar or analogous reference numerals in the drawings and description have been used to refer to similar or analogous parts of the present invention. As used herein, the terms “first,” “second,” and “third,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.
[0026] like Figures 1 to 4 As shown, according to an embodiment of this utility model, a bottom expansion limiting device for a two-stage heating module of a horizontal waste heat boiler is provided, such as... Figure 1 As shown, the waste heat boiler has a first heating module 2 and a second heating module 4. The limiting device can fix the first heating module 2 and the second heating module 4 of the waste heat boiler. The limiting device includes a first limiting component, a second limiting component, and a fixing frame 1. One end of the first limiting component is connected to the fixing frame 1, and the other end of the first limiting component is connected to the bottom of the first heating module 2. The first limiting component can cause the first heating module 2 to expand and contract in a predetermined direction and length. One end of the second limiting component is connected to the fixing frame 1, and the other end of the second limiting component is connected to the bottom of the second heating module 4. The second limiting component can cause the second heating module 4 to expand and contract in a predetermined direction and length.
[0027] Furthermore, such as Figure 2 As shown, the first heating module 2 includes a first pipe row 20 and a second pipe row 29; the first limiting assembly includes a first ear plate 21, a first connecting plate 27, a first bracket 28 and a second bracket 30. One end of the first ear plate 21 is welded to the fixing frame 1, and the other end of the first ear plate 21 is slidably connected to one end of the first connecting plate 27. The axis of the length direction of the first ear plate 21 is parallel to the axis of the length direction of the first connecting plate 27. The axis of the length direction of the first bracket 28 is perpendicular to the axis of the length direction of the first connecting plate 27. The lower end of the first bracket 28 is connected to the first connecting plate 27, and the upper end of the first bracket 28 is welded to the first pipe row 20. The lower end of the second bracket 30 is slidably connected to the other end of the first connecting plate 27, and the upper end of the second bracket 30 is welded to the second pipe row 29.
[0028] Furthermore, such as Figure 3 As shown, there are two first ear plates 21 arranged in parallel. The other end of the first ear plate 21 is provided with a first elongated hole 22. One end of the first connecting plate 27 is located between the two first ear plates 21. One end of the first connecting plate 27 is provided with a first pin 24. The two ends of the first pin 24 pass through the first elongated holes 22 of the two first connecting plates 27 respectively. The first elongated holes 22 provide a sliding track for the first connecting plate 27 to slide freely through the first pin 24.
[0029] Furthermore, there are two first brackets 28, which are located on both sides of the first connecting plate 27 respectively, and the two first brackets 28 are connected to the first connecting plate 27 by the second pin 25.
[0030] Furthermore, two second brackets 30 are provided, and the two second brackets 30 are respectively located on both sides of the first connecting plate 27; the lower end of the second bracket 30 is provided with a second elongated hole 23, and the other end of the first connecting plate 27 is provided with a third pin 26, and the two ends of the third pin 26 are respectively passed through the second elongated holes 23 of the two second brackets 30; the second elongated holes 23 provide a sliding track for the second bracket 30 to slide freely through the third pin 26.
[0031] When the first heated module 2 expands and contracts due to heat, the first pipe array 20 drives the first connecting plate 27 to slide freely along the length direction of the first elongated hole 22 via the first bracket 28. The length of the first elongated hole 22 can limit the expansion and contraction length of the first pipe array 20. The second pipe array 29 drives the first bracket 28 to slide freely along the length direction of the second elongated hole 23. The length of the second elongated hole 23 can limit the expansion and contraction length of the second pipe array 29.
[0032] Furthermore, such as Figure 4 As shown, the second heating module 4 includes a third pipe row 40 and a fourth pipe row 49. The second limiting assembly includes a second ear plate 41, a second connecting plate 47, a third bracket 48, and a fourth bracket 50. One end of the second ear plate 41 is welded to the fixing frame 1, and the other end of the second ear plate 41 is slidably connected to one end of the second connecting plate 47. The axis of the second ear plate 41 in the length direction is parallel to the axis of the second connecting plate 47 in the length direction. The lower end of the third bracket 48 is connected to the middle part of the second connecting plate 47, and the upper end of the third bracket 48 is welded to the third pipe row 40. The lower end of the fourth bracket 50 is slidably connected to the other end of the second connecting plate 47, and the upper end of the fourth bracket 50 is welded to the fourth pipe row 49.
[0033] Furthermore, two second ear plates 41 are provided, which are arranged in parallel. The other end of the second ear plate 41 is provided with a third elongated hole 42. One end of the second connecting plate 47 is located between the two second ear plates 41, and one end of the second connecting plate 47 is provided with a fourth pin 44. The two ends of the fourth pin 44 pass through the third elongated holes 42 of the two second connecting plates 47 respectively. The third elongated holes 42 provide a sliding track for the second connecting plate 47 to slide freely through the fourth pin 44.
[0034] Furthermore, there are two third brackets 48, which are located on both sides of the second connecting plate 47 respectively, and the two third brackets 48 are connected to the second connecting plate 47 by the fifth pin 45.
[0035] Furthermore, two fourth brackets 50 are provided, with the two fourth brackets 50 located on both sides of the second connecting plate 47 respectively; the lower end of the fourth bracket 50 is provided with a fourth elongated hole 43, and the other end of the second connecting plate 47 is provided with a sixth pin 46, with both ends of the sixth pin 46 passing through the fourth elongated holes 43 of the two fourth brackets 50 respectively; the fourth elongated holes 43 provide a sliding track for the fourth bracket 50 to slide freely through the sixth pin 46.
[0036] When the second heated module 4 expands and contracts due to heat, the third pipe bank 40 drives the second connecting plate 47 to slide freely along the length direction of the third elongated hole 42 via the third bracket 48. The length of the third elongated hole 42 can limit the expansion and contraction length of the third pipe bank 40. The fourth pipe bank 49 drives the fourth bracket 50 to slide freely along the length direction of the fourth elongated hole 43. The length of the fourth elongated hole 43 can limit the expansion and contraction length of the second pipe bank 29.
[0037] Furthermore, the fixing frame 1 is a steel structure and serves as the support frame for the waste heat boiler.
[0038] Installation and adjustment of the limit device:
[0039] During installation, the limiting device first determines the welding position of the first ear plate 21 on the fixing frame 1, as well as the length and direction of the first elongated hole 22 and the second elongated hole 23, based on the actual position and size of the first heated module 2. Then, based on the actual position and size of the second heated module 4, it determines the welding position of the second ear plate 41 on the fixing frame 1, as well as the length and direction of the third elongated hole 42 and the fourth elongated hole 43.
[0040] Then, the first limiting assembly is installed by placing the first connecting plate 27 inside the two first ear plates 21 and fixing the first connecting plate 27 in the slide rail formed by the two first elongated holes 22 using the first pin 24. Next, the first bracket 28 is welded to the bottom of the first pipe row 20 of the first heating module 2 and connected to the first connecting plate 27 using the second pin 25. The second bracket 30 is welded to the bottom of the second pipe row 29 of the first heating module 2, and the first connecting plate 27 is placed inside the two second brackets 30 and fixed in the slide rail formed by the two second elongated holes 23 using the third pin 26.
[0041] Install the second limit component according to the installation method of the first limit component.
[0042] Finally, check the sturdiness and stability of the entire limit device to ensure that it will not loosen or fall off during operation.
[0043] When the first heating module 2 and the second heating module 4 expand at different rates due to the different flue gas temperatures, the first connecting plate 27 and the second connecting plate 47 can slide freely within their respective tracks, thereby ensuring that the heating modules expand and contract in a predetermined direction and length.
[0044] During the operation of the waste heat boiler, the firmness and stability of the limit device, as well as the sliding condition of the connecting plate in the slide, should be checked regularly.
[0045] If any abnormality is found, adjustments and repairs should be made in a timely manner to ensure the normal operation of the limit device.
[0046] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:
[0047] A bottom expansion limiting device for a two-stage heating module in a horizontal waste heat boiler is disclosed. This device, by setting a first limiting component for the first heating module 2 and a second limiting group for the second heating module 4, allows the first and second heating modules 2 and 4 to expand freely within a predetermined direction and length. This effectively avoids jamming and leakage accidents caused by uneven expansion, reduces heat loss and mechanical stress due to uneven expansion, thereby improving the operational stability and safety of the waste heat boiler, ensuring its normal operation, increasing energy conversion efficiency, and contributing to energy conservation and emission reduction. This limiting device effectively absorbs the vibration energy from flue gas impact, reduces the swaying of the heating surface modules, improves the overall vibration resistance of the waste heat boiler, and thus improves its thermal efficiency. The limiting device also has advantages such as simple structure, easy maintenance, and wide applicability, while improving the maintainability and reliability of the equipment, making it highly practical and worthy of widespread application.
[0048] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A bottom expansion limiting device for a two-stage heating module in a horizontal waste heat boiler, characterized in that, The waste heat boiler has a first heating module and a second heating module, and the limiting device includes a first limiting component, a second limiting component, and a fixing frame, wherein... One end of the first limiting component is connected to the fixing frame, and the other end of the first limiting component is connected to the bottom of the first heating module. The first limiting component enables the first heating module to expand and contract in a predetermined direction and length. One end of the second limiting component is connected to the fixing frame, and the other end of the second limiting component is connected to the bottom of the second heating module. The second limiting component enables the second heating module to expand and contract in a predetermined direction and length.
2. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 1, characterized in that, The first heating module includes a first pipe bank and a second pipe bank; The first limiting component includes a first ear plate, a first connecting plate, a first bracket, and a second bracket. One end of the first ear plate is connected to the fixed frame, and the other end of the first ear plate is slidably connected to one end of the first connecting plate. The axis of the length direction of the first ear plate is parallel to the axis of the length direction of the first connecting plate. The axis of the first bracket along its length is perpendicular to the axis of the first connecting plate along its length. The lower end of the first bracket is connected to the first connecting plate, and the upper end of the first bracket is connected to the first pipe bank. The lower end of the second bracket is slidably connected to the other end of the first connecting plate, and the upper end of the second bracket is connected to the second pipe bank.
3. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 2, characterized in that, Two first ear plates are provided, and the two first ear plates are arranged in parallel. A first elongated hole is provided at the other end of the first ear plate. One end of the first connecting plate is located between the two first ear plates. A first pin is provided at one end of the first connecting plate. The two ends of the first pin pass through the first elongated hole of the two first connecting plates respectively. The first elongated hole provides a sliding track for the first connecting plate to slide freely through the first pin.
4. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 2, characterized in that, There are two first brackets, which are located on both sides of the first connecting plate and are connected to the first connecting plate by second pins.
5. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 2, characterized in that, There are two second brackets, which are located on both sides of the first connecting plate. The lower end of the second bracket is provided with a second elongated hole, and the other end of the first connecting plate is provided with a third pin. The two ends of the third pin are respectively protruding from the second elongated holes of the two second brackets. The second elongated hole provides a sliding track for the second bracket to slide freely through the third pin.
6. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 1, characterized in that, The second heating module includes a third pipe bank and a fourth pipe bank. The second limiting component includes a second ear plate, a second connecting plate, a third bracket, and a fourth bracket. One end of the second ear plate is connected to the fixed frame, and the other end of the second ear plate is slidably connected to one end of the second connecting plate. The axis of the second ear plate in the length direction is parallel to the axis of the second connecting plate in the length direction. The lower end of the third bracket is connected to the middle part of the second connecting plate, and the upper end of the third bracket is connected to the third pipe bank. The lower end of the fourth bracket is slidably connected to the other end of the second connecting plate, and the upper end of the fourth bracket is connected to the fourth pipe bank.
7. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 6, characterized in that, The second ear plate is provided in two pieces, which are arranged in parallel. The other end of the second ear plate is provided with a third elongated hole. One end of the second connecting plate is located between the two second ear plates. One end of the second connecting plate is provided with a fourth pin. The two ends of the fourth pin pass through the third elongated hole of the two second connecting plates respectively. The third elongated hole provides a sliding track for the second connecting plate to slide freely through the fourth pin.
8. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 6, characterized in that, There are two third brackets, which are located on both sides of the second connecting plate and are connected to the second connecting plate by a fifth pin.
9. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 6, characterized in that, There are two fourth brackets, which are located on both sides of the second connecting plate. The lower end of the fourth bracket is provided with a fourth elongated hole, and the other end of the second connecting plate is provided with a sixth pin, with the two ends of the sixth pin passing through the fourth elongated holes of the two fourth brackets respectively. The fourth elongated hole provides a sliding track for the fourth bracket to slide freely through the sixth pin.
10. The bottom expansion limiting device for the two-stage heating module of the horizontal waste heat boiler according to claim 1, characterized in that, The mounting frame is a steel structure.