Independent cantilever type stokehole high-low seal

Abstract

The invention relates to the technical field of power station boiler structures, and discloses an independent cantilever type stokehole high-low seal which comprises a longitudinal beam and at least two fixing units, the at least two fixing units are arranged at intervals in the extending direction of the longitudinal beam, and one fixing unit comprises an upper chord member and a lower chord member; the end, close to the main plant column, of the upper chord is fixedly connected to the main plant column, the end, close to the main plant column, of the lower chord is fixedly connected to the main plant column, the end, away from the main plant column, of the upper chord is fixedly connected to the end, away from the main plant column, of the lower chord, and the upper chord, the lower chord and the main plant column jointly form a triangular structure. A gap is formed between one end, far away from the main power house column, of the upper chord and the boiler room column; the longitudinal beams are fixedly connected to the upper chords of the fixing units respectively. The boiler room and the main power house are separated from each other in structural significance and do not influence each other when resisting horizontal action, so that respective structural calculation is clearer and clearer, and structural safety is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of power station boiler structures, in particular to an independent cantilever type furnace front high and low seal. Background Art

[0002] The power industry is an important basic industry and public utility for national economic and social development, and thermal power generation occupies a dominant position in the power industry due to its advantages such as low site selection requirements, short construction period, high power generation stability, and relatively low power generation costs and grid-connected electricity prices. A thermal power plant includes: the main plant, boiler room, and high and low seals in front of the furnace. The net distance between the main plant and the boiler room is 6m to 10m. The two ends of the high and low seals in front of the furnace are supported on the column-side brackets of the main plant and the boiler room respectively. The high and low seals in front of the furnace are used to arrange a series of process pipelines.

[0003] At present, in order to prevent the main plant and boiler room from being affected by the high and low seal connection in front of the furnace when an earthquake occurs, the two end nodes of the high and low seal beam in front of the furnace are generally connected by sliding at the main plant end and hinged at the boiler room end. The sliding end connection node between the main plant and the high and low seal in front of the furnace is achieved by pasting polytetrafluoroethylene plates on the lower surface of the end pad of the longitudinal beam of the high and low seal in front of the furnace and the upper surface of the corbel embedded parts of the main plant, respectively, and using the sliding between the two polytetrafluoroethylene plates to achieve the sliding connection between the main plant and the high and low seal in front of the furnace.

[0004] Due to the difference in vibration characteristics, there will be a large relative displacement between the main plant and the boiler room during an earthquake. Sufficient sliding distance is reserved for the sliding end connection node in the direction of the horizontal beam axis of the high and low seals in front of the furnace. In the direction of the longitudinal beam axis, in order to avoid damage to the process pipeline caused by relative displacement, short limit steel is generally welded at the bottom of the longitudinal beam to prevent the displacement of the steel beam in this direction from exceeding ±10mm. The shortcomings of the existing technology include: First, for the main plant, the high and low seals in front of the furnace slide in the direction of the horizontal beam axis and there is friction on the corbel, and the limit in the axial direction of the longitudinal beam will transmit the horizontal force in this direction. However, since the main plant and the boiler room are designed by two units respectively, the overall structural calculation model will not be established, so the above-mentioned friction and horizontal force are difficult to quantify, and are generally not considered in the structural calculation model of the main plant. Therefore, the structural design of the main plant may have certain safety hazards. Secondly, since both sides of the high and low seals in front of the furnace need to be rooted on the corbels of the main plant and the boiler room at the same time, and the column positions of the two cannot be aligned due to the influence of the process layout, and since the length of the main plant is larger than that of the boiler room, it is usually necessary to set a long cantilever beam on the corner column corbel on one side of the boiler room to meet the rooting needs of the high and low seals in front of the furnace. When the cantilever is too long, its bearing capacity and deformation are difficult to meet the requirements. Summary of the invention

[0005] The purpose of the present invention is to provide an independent cantilever furnace front high and low seal, which, under the premise of meeting the requirements of enclosure and closure between the boiler room and the main plant and the rooting requirements of pipe supports and hangers, separates the boiler room from the main plant in a structural sense, does not affect each other when resisting horizontal effects, makes the respective structural calculations clearer and more definite, and ensures structural safety; at the same time, it is no longer subject to the problem of inability to root due to the length difference between the main plant and the boiler room.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an independent cantilever furnace front high and low seal, which includes: a longitudinal beam and at least two fixed units, at least two fixed units are arranged at intervals along the extension direction of the longitudinal beam, and one fixed unit includes: an upper chord and a lower chord; one end of the upper chord close to the main plant column is used for fixed connection to the main plant column, one end of the lower chord close to the main plant column is used for fixed connection to the main plant column, one end of the upper chord away from the main plant column is fixedly connected to one end of the lower chord away from the main plant column, the upper chord, the lower chord and the main plant column together form a triangular structure, and a distance is provided between one end of the upper chord away from the main plant column and the boiler room column; the longitudinal beam is fixedly connected to the upper chord of each fixed unit respectively.

[0007] Furthermore, there are multiple longitudinal beams, and the multiple longitudinal beams are arranged at intervals along the extension direction of the upper chord.

[0008] Furthermore, each fixing unit further comprises a first web member, an end of the first web member close to the longitudinal beam is welded to the upper chord, and an end of the first web member away from the longitudinal beam is welded to the lower chord.

[0009] Furthermore, there are a plurality of first web members, and the plurality of first web members are arranged at intervals along the extension direction of the upper chord.

[0010] Furthermore, each fixing unit also includes a second web member, which is inclined, with one end of the second web member close to the longitudinal beam welded to the upper chord, and one end of the second web member away from the longitudinal beam welded to the lower chord.

[0011] Furthermore, there are multiple second web members, and the multiple second web members are arranged at intervals along the extension direction of the upper chord.

[0012] Furthermore, the fixing unit also includes an upper embedded part, which is fixed inside the main plant column, and the upper chord is fixedly connected to the main plant column through the upper embedded part.

[0013] Furthermore, the fixing unit also includes a lower embedded part, which is spaced apart from the upper embedded part, and the lower embedded part is fixed inside the main plant column, and the lower chord is fixedly connected to the main plant column through the lower embedded part.

[0014] Furthermore, the independent cantilever furnace front high and low seals also include a horizontal fixing structure, which includes two support rods, which are cross-arranged with each other, and each support rod is fixedly connected to the upper chord rod.

[0015] Furthermore, there are multiple horizontal fixing structures, and the multiple horizontal fixing structures are arranged at intervals along the extension direction of the longitudinal beam.

[0016] Compared with the prior art, the independent cantilever furnace front high and low seal of the embodiment of the present invention has the following beneficial effects: (1) The technical solution meets the requirements of enclosure and sealing between the boiler room and the main plant and the arrangement of a series of process pipelines.

[0017] (2) The fixed units are arranged at intervals along the extension direction of the longitudinal beam, serving as the supporting structure of the longitudinal beam, thus ensuring the structural stability of the longitudinal beam. Each fixed unit includes an upper chord and a lower chord, one end of which is firmly connected to the main plant column, and the other end is connected to each other, forming a triangular structure with the main plant column, which utilizes the mechanical principle of triangle stability to resist external forces and enhances the overall stability of the structure. By connecting the main plant column with the fixed unit, the problem of unclear horizontal forces that may exist in the support scheme of the high and low seals at both ends of the furnace is avoided, ensuring the accuracy and safety of the structural calculation.

[0018] (3) The high and low seals in front of the furnace are independently supported on the main plant building only through the fixing unit. Under the fixing effect of the fixing unit and the main plant building, no obvious relative displacement will occur. Even in an earthquake, because the fixing unit is only fixed on the column of the main plant building and is not fixedly connected to the boiler room column, it can be ensured that the process pipelines connected to the high and low seals in front of the furnace will not be damaged.

[0019] (4) This scheme divides the structural design of the thermal power plant into the main plant building, the high and low seals in front of the furnace, and the boiler room. Compared with the existing technology where the high and low seals in front of the furnace need to be connected to the main plant building and the boiler room, this scheme can reduce the coordination work between the civil engineering department of the main plant building design institute and the boiler room, thereby improving the efficiency of engineering design and construction.

[0020] (5) Since one end of the upper chord is not connected to one end of the boiler room column, its arrangement is no longer limited by the position of the boiler room column, which is more flexible than the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a top view of an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 Section view along AA.

[0023] In the figure, 100, main plant column; 200, boiler room column;

[0024] 1. Stringer;

[0025] 2. Fixing unit; 21. Upper chord; 22. Lower chord; 23. First web member; 24. Second web member; 25. Upper embedded part; 26. Lower embedded part;

[0026] 3. Horizontal fixed structure; 31. Support rod. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] like Figure 1-2 As shown, an independent cantilever furnace front high and low seal of a preferred embodiment of the present invention comprises: a longitudinal beam 1 and at least two fixed units 2, at least two fixed units 2 are arranged at intervals along the extension direction of the longitudinal beam 1, and one fixed unit 2 comprises: an upper chord 21 and a lower chord 22; an end of the upper chord 21 close to the main plant column 100 is used for fixed connection to the main plant column 100, an end of the lower chord 22 close to the main plant column 100 is used for fixed connection to the main plant column 100, an end of the upper chord 21 away from the main plant column 100 is fixedly connected to an end of the lower chord 22 away from the main plant column 100, the upper chord 21, the lower chord 22 and the main plant column 100 together form a triangular structure, and a distance is provided between the end of the upper chord 21 away from the main plant column 100 and the boiler room column 200; the longitudinal beam 1 is fixedly connected to the upper chord 21 of each fixed unit 2 respectively.

[0031] Based on the above scheme, the present application meets the requirements of enclosure and arrangement of a series of process pipelines between the boiler room and the main plant. The fixed units 2 are arranged at intervals along the extension direction of the longitudinal beam 1, and serve as the supporting structure of the longitudinal beam 1, thereby ensuring the structural stability of the longitudinal beam 1. Each fixed unit 2 includes an upper chord 21 and a lower chord 22, one end of which is firmly connected to the main plant column 100, and the other end is connected to each other, forming a triangular structure together with the main plant column 100, which utilizes the mechanical principle of triangle stability to resist external forces and enhances the overall stability of the structure. By connecting the main plant column 100 through the fixed unit 2, the problem of unclear horizontal force that may exist in the support scheme of the high and low seals at both ends in front of the furnace is avoided, thereby ensuring the accuracy and safety of the structural calculation. The high and low seals in front of the furnace are independently supported on the main plant only through the fixing unit 2. Under the fixing effect of the fixing unit 2 and the main plant, there will be no obvious relative displacement. Even in an earthquake, because the fixing unit 2 is only fixed on the main plant column 100 and is not fixedly connected to the boiler room column 200, it can ensure that the process pipelines connected to the high and low seals in front of the furnace are not damaged. This solution divides the structural design of the thermal power plant into the main plant, the high and low seals in front of the furnace, and the boiler room, which can reduce the coordination work between the civil engineering major of the main plant design institute and the boiler room, and improve the efficiency of engineering design and construction. Since one end of the upper chord rod 21 is far away from one end of the boiler room column 200, there is no connection relationship, and its layout is no longer limited by the position of the boiler room column 200, which is more flexible than the existing technology.

[0032] Preferably, there are multiple longitudinal beams 1, which are used as rooting points of the pipeline support and hanger, and multiple longitudinal beams 1 are arranged at intervals along the extension direction of the upper chord 21. The longitudinal beams 1 can also transmit the horizontal external force of the fixing unit 2 together with the horizontal fixing structure 3 to ensure its horizontal stability.

[0033] Preferably, each fixing unit 2 further includes a first web member 23, one end of the first web member 23 close to the longitudinal beam 1 is welded to the upper chord 21, and one end of the first web member 23 away from the longitudinal beam 1 is welded to the lower chord 22. In this embodiment, the first web member 23 is connected to the upper chord 21 and the lower chord 22 by welding, and the first web member 23 is arranged parallel to the main plant column 100, so that the first web member 23, the upper chord 21 and the lower chord 22 form a triangular structure, and then the main plant column 100, the upper chord 21 and the lower chord 22 form a more stable triangular structure, and the first web member 23 enhances the reliability of the fixing unit 2.

[0034] Preferably, there are multiple first web members 23, which are spaced apart along the extension direction of the upper chord 21. The multiple first web members 23 can form a triangular structure with the upper chord 21 and the lower chord 22, further enhancing the strength and stability of the entire structure.

[0035] Preferably, each fixing unit 2 further includes a second web member 24, which is inclined, and one end of the second web member 24 close to the longitudinal beam 1 is welded to the upper chord 21, and one end of the second web member 24 away from the longitudinal beam 1 is welded to the lower chord 22. The second web member 24 is connected to the upper chord 21 and the lower chord 22 by welding, so that the second web member 24, the upper chord 21 and the first web member 23 or the second web member 24, the lower chord 22 and the first web member 23 or the second web member 24, the lower chord 22 and the main building column 100 or the second web member 24, the upper chord 21 and the lower chord 22 form a triangular structure, and the first web member 23 and the second web member 24 jointly enhance the rigidity and stability of the fixing unit 2.

[0036] Preferably, the number of the second web members 24 is multiple, and the multiple second web members 24 are arranged at intervals along the extension direction of the upper chord 21. The multiple second web members 24 simultaneously realize that the second web members 24, the upper chord 21 and the first web members 23, and / or the second web members 24, the lower chord 22 and the first web members 23, and / or the second web members 24, the lower chord 22 and the main plant column 100, and / or the second web members 24, the upper chord 21 and the lower chord 22 form multiple triangular structures, further enhancing the strength and stability of the entire structure.

[0037] Preferably, the fixing unit 2 further includes an upper embedded part 25, which is fixed inside the main plant column 100, and the upper chord rod 21 is fixedly connected to the main plant column 100 through the upper embedded part 25. The upper embedded part 25 is provided and the upper chord rod 21 is fixedly connected to the main plant column 100 through it, which greatly enhances the reliability of the connection between the upper chord rod 21 and the main plant column 100, so that the independent cantilever furnace front high and low seal is more tightly connected to the main plant column 100. When the furnace front high and low seal is subjected to external force (earthquake), the force can be more effectively transmitted to the main plant column 100 through the upper embedded part 25.

[0038] Preferably, the fixing unit 2 further includes a lower embedded part 26, which is arranged at an interval with the upper embedded part 25, and the lower embedded part 26 is fixed inside the main plant column 100, and the lower chord 22 is fixedly connected to the main plant column 100 through the lower embedded part 26. The function of the lower embedded part 26 is similar to that of the upper embedded part 25, and the lower chord 22 is fixedly connected to the main plant column 100 through the lower embedded part 26, which greatly enhances the reliability of the connection between the lower chord 22 and the main plant column 100.

[0039] Preferably, the independent cantilever type furnace front high and low seal also includes a horizontal fixed structure 3, which includes two support rods 31, which are arranged crosswise, and each support rod 31 is fixedly connected to the upper chord rod 21. The horizontal fixed structure 3 composed of two crosswise support rods 31 is connected to the upper chord rod 21. When a certain fixed unit 2 is subjected to a horizontal external force, the support rod 31 can transfer the horizontal force to other fixed units 2, so that each fixed unit 2 forms a stable structural system in the horizontal direction, the force is more uniform, the local stress concentration is reduced, and the bearing capacity and stability of the furnace front high and low seal in the horizontal direction are effectively improved.

[0040] Preferably, there are multiple horizontal fixing structures 3, and the multiple horizontal fixing structures 3 are arranged at intervals along the extending direction of the longitudinal beam 1, so as to further increase the stability of the furnace front high and low seals in the horizontal direction.

[0041] In summary, the embodiment of the present invention provides an independent cantilever furnace front high and low seal, which meets the requirements of enclosure and arrangement of a series of process pipelines between the boiler room and the main plant. The fixed units 2 are arranged at intervals along the extension direction of the longitudinal beam 1, and serve as the supporting structure of the longitudinal beam 1, thereby ensuring the structural stability of the longitudinal beam 1. Each fixed unit 2 includes an upper chord 21 and a lower chord 22, one end of which is firmly connected to the main plant column 100, and the other end is connected to each other, forming a triangular structure together with the main plant column 100, which utilizes the mechanical principle of triangle stability to resist external forces and enhances the overall stability of the structure. By connecting the main plant column 100 through the fixed unit 2, the problem of unclear horizontal forces that may exist in the support schemes at both ends of the furnace front high and low seals is avoided, thereby ensuring the accuracy and safety of the structural calculation. The high and low seals in front of the furnace are independently supported on the main plant only through the fixing unit 2. Under the fixing effect of the fixing unit 2 and the main plant, there will be no obvious relative displacement. Even in an earthquake, because the fixing unit 2 is only fixed on the main plant column 100 and is not fixedly connected to the boiler room column 200, it can ensure that the process pipelines connected to the high and low seals in front of the furnace are not damaged. This solution divides the structural design of the thermal power plant into the main plant, the high and low seals in front of the furnace, and the boiler room, which can reduce the coordination between the civil engineering major of the main plant design institute and the boiler room, and improve the efficiency of engineering design and construction. Since one end of the upper chord rod 21 is far away from one end of the boiler room column 200, there is no connection relationship, and its layout is no longer limited by the position of the boiler room column 200, which is more flexible than the existing technology.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An independent cantilever furnace front high and low seal, characterized in that: include: A longitudinal beam (1) and at least two fixing units (2), wherein the at least two fixing units (2) are arranged at intervals along the extension direction of the longitudinal beam (1), and one of the fixing units (2) comprises: an upper chord (21) and a lower chord (22); One end of the upper chord rod (21) close to the main plant column (100) is used for fixed connection to the main plant column (100), one end of the lower chord rod (22) close to the main plant column (100) is used for fixed connection to the main plant column (100), one end of the upper chord rod (21) away from the main plant column (100) is fixedly connected to one end of the lower chord rod (22) away from the main plant column (100), the upper chord rod (21), the lower chord rod (22) and the main plant column (100) together form a triangular structure, and a distance is provided between one end of the upper chord rod (21) away from the main plant column (100) and the boiler room column (200); The longitudinal beams (1) are respectively fixedly connected to the upper chord rods (21) of the fixing units (2).

2. The independent cantilever furnace front high and low seal according to claim 1 is characterized in that: The longitudinal beams (1) are multiple in number, and the multiple longitudinal beams (1) are arranged at intervals along the extension direction of the upper chord (21).

3. The independent cantilever furnace front high and low seal according to claim 1 is characterized in that: Each of the fixing units (2) further comprises a first web member (23), wherein one end of the first web member (23) close to the longitudinal beam (1) is welded to the upper chord member (21), and one end of the first web member (23) away from the longitudinal beam (1) is welded to the lower chord member (22).

4. The independent cantilever furnace front high and low seal according to claim 3 is characterized in that: There are a plurality of first web members (23), and the plurality of first web members (23) are arranged at intervals along the extension direction of the upper chord member (21).

5. The independent cantilever furnace front high and low seal according to claim 4 is characterized in that: Each of the fixing units (2) further comprises a second web member (24), the second web member (24) being inclined, an end of the second web member (24) close to the longitudinal beam (1) being welded to the upper chord member (21), and an end of the second web member (24) far from the longitudinal beam (1) being welded to the lower chord member (22).

6. The independent cantilever furnace front high and low seal according to claim 5 is characterized in that: There are a plurality of second web members (24), and the plurality of second web members (24) are arranged at intervals along the extension direction of the upper chord member (21).

7. The independent cantilever furnace front high and low seal according to claim 6 is characterized in that: The fixing unit (2) further comprises an upper embedded part (25), wherein the upper embedded part (25) is fixed inside the main plant column (100), and the upper chord (21) is fixedly connected to the main plant column (100) via the upper embedded part (25).

8. The independent cantilever furnace front high and low seal according to claim 7 is characterized in that: The fixing unit (2) further comprises a lower embedded part (26), the lower embedded part (26) and the upper embedded part (25) are arranged with an upper and lower spacing, and the lower embedded part (26) is fixed inside the main plant column (100), and the lower chord (22) is fixedly connected to the main plant column (100) via the lower embedded part (26).

9. The independent cantilever furnace front high and low seal according to claim 7 is characterized in that: It also comprises a horizontal fixing structure (3), wherein the horizontal fixing structure (3) comprises two support rods (31), the two support rods (31) are arranged crosswise with each other, and each support rod (31) is fixedly connected to the upper chord rod (21).

10. The independent cantilever furnace front high and low seal according to claim 9, characterized in that: The number of the horizontal fixing structures (3) is multiple, and the multiple horizontal fixing structures (3) are arranged at intervals along the extension direction of the longitudinal beam (1).

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