Pipe fixing device of platen superheater on upper portion of power station boiler combustion chamber

Abstract

The utility model particularly relates to a pipe body fixing device of a platen superheater at the upper part of a combustion chamber of a power station boiler, which comprises two symmetrically arranged first comb-shaped plates and two symmetrically arranged second comb-shaped plates, each first comb-shaped plate and each second comb-shaped plate are respectively provided with a plurality of arc-shaped grooves, and the arc-shaped grooves are arranged in the first comb-shaped plates and the second comb-shaped plates. Each first comb-shaped plate and each second comb-shaped plate are provided with insertion holes, positioning insertion plates are arranged in the insertion holes, arc-shaped clamping plates are arranged on the outer sides of the first comb-shaped plates and the outer sides of the second comb-shaped plates, and welding plates are arranged at the end of each first comb-shaped plate and the end of the second comb-shaped plate on the opposite side. According to the utility model, the platen superheater tube bank and the fluid cooling tube panel positioning tube are fixed at the same time, the expansion is ensured, the position of the tube bank is limited, the phenomena of out-of-row arrangement, wrong arrangement and the like of the tube bank are avoided, the wear index value of the tubes on the heating surface is reduced, the aim of reducing the leakage rate of four tubes of a boiler is fulfilled, and the protection effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the tube row fixing device of power station boiler combustion chamber upper superheater, the shape, the rationality of structure and the safety and reliable degree of tube row fixing device of power station boiler combustion chamber upper superheater (screen type superheater, rear screen superheater) field, specifically point to a kind of tube row fixing device of power station boiler combustion chamber upper superheater (screen type superheater, rear screen superheater). BACKGROUND

[0002] At present, the heating surface of power station boiler is installed in a tight construction period, and the installation supervision is not in place, especially the superheater (screen type superheater, rear screen superheater) tube row arranged above the boiler combustion chamber. Under the action of high-temperature smoke disturbance force in the boiler combustion process, a part of the tube row is designed to be fixed, and the fixed structure fails, resulting in the out-of-row of the tube, the misalignment of the tube, the uneven spacing between the tubes, and the imperfect original anti-wear device. The out-of-row tube is abraded by the flue gas, and the adjacent tubes are in long-term contact after out-of-row and misalignment, which causes collision and abrasion. When the thickness of the tube is abraded and thinned, the strength is lower than the allowable value of the material, which causes tube leakage, tube burst and other accidents, causing great economic loss. Therefore, a boiler heating surface tube row fixing device is needed to arrange the tubes in order, ensure the expansion, limit the position of the tube row, avoid the out-of-row and misalignment of the tube row, reduce the abrasion index of the heating surface tube, and achieve the purpose of reducing the leakage rate of the "four tubes" of the boiler, with good protection effect.

[0003] The tube row of the heating surface of the power station boiler usually includes vertically arranged superheater tubes and fluid cooling tube screen positioning tubes perpendicular to the direction of the superheater tubes, so the fixing device of the tube row needs to consider the superheater tubes and the fluid cooling tube screen positioning tubes.

[0004] The position of the tube row of the heating surface of the power station boiler is spacious, with no support platform below, tight spacing and limited operation space, so the pin plate tube clamp clamping method is used.

[0005] Chinese Patent CN221923421U discloses a boiler heating surface tube bank fixing device, including comb-shaped plates and bolts. The comb-shaped plates consist of two symmetrically arranged plates, each with a continuously wavy arc-shaped groove along its extension direction. Each comb-shaped plate has connecting holes at its left and right ends for fixing. The two comb-shaped plates are connected by bolts and connecting holes to form a detachable connection structure. Each comb-shaped plate has continuously wavy protrusions at its front and rear ends along its edge extension direction. The overall structure of this device adopts a component-based disassembly method, making installation and disassembly convenient. After being fixed in use, this device is not affected by flue gas during high-temperature flue gas operation. The device is not affected by the dynamic field disturbance and does not produce warping deformation. During boiler operation, it can firmly fix the tube bank, thereby avoiding misalignment, disorder, and deformation of the tube bank, thus reducing the wear rate of the tube bank and reducing the incidence of tube bank leakage and tube rupture accidents. However, the technical solution disclosed in this patent only discloses the fixing of the tube bank of the screen-type superheater, and does not show how to fix the tube bank of the screen-type superheater and the positioning tube of the fluid cooling tube screen. It does not fix and protect the positioning tube of the fluid cooling tube screen, and its end is fastened with bolts, which requires leaving enough operating space. It is difficult to implement in the installation position of the screen-type superheater tube and the positioning tube of the fluid cooling tube screen in the space that is extremely narrow. Utility Model Content

[0006] The technical problem to be solved by this utility model is to overcome the defects of leakage during maintenance caused by wear of the outgoing and rear-mounted pipes, and to provide a pipe fixing device for the upper screen-type superheater of the combustion chamber of a power plant boiler.

[0007] A tube fixing device for an upper screen-type superheater in the combustion chamber of a power plant boiler includes two symmetrically arranged first comb plates and two symmetrically arranged second comb plates. One first comb plate is located on the upper side of one second comb plate, and the other first comb plate is located on the lower side of the other second comb plate. Each first comb plate and each second comb plate is provided with several arc-shaped grooves that can fit together and fasten onto the tubes. Each first comb plate and each second comb plate is provided with an insertion hole located between two adjacent arc-shaped grooves. A positioning insert plate is provided in the insertion hole. Arc-shaped retaining plates are provided on the outer side of the first comb plate and the outer side of the second comb plate. A welding plate is provided at the end of each first comb plate and the end of the second comb plate on the opposite side.

[0008] Furthermore, both the first and second comb plates on the same side are provided with skylight grooves, and the two skylight grooves are interlocked to form a skylight hole.

[0009] Furthermore, the first comb plate and its arc-shaped clamping plate are integrally formed, and the second comb plate and its arc-shaped clamping plate are integrally formed.

[0010] Further, the arc-shaped clamping plate adopts a circular arc design, and the arc-shaped angle ranges from 150° to 180°.

[0011] Further, the arc-shaped groove forms a pipe fixing device which is crosswise arranged with the pipe fixing device formed by the arc-shaped clamping plate.

[0012] The utility model discloses the advantages that: the utility model discloses reasonable structure, adopts the component combination mode, and installation and dismounting are more convenient and fast, realize the fixation of the positioning pipe of the fluid cooling pipe screen to the overheat ware row pipe and fluid cooling pipe screen simultaneously, and the orderly arrangement and fixation of the overheat ware row pipe of screen type and the fixation of the positioning pipe of the fluid cooling pipe screen, avoid the wear and tear phenomenon such as the disorder, the disorder, the deformation of pipe row, reduce the wear index value of heating surface pipe, realize the reduction of leakage rate, and the protection effect is good.

[0013] The utility model discloses be applicable to the installation of screen type, rear screen overheat ware row pipe and fluid cooling pipe screen positioning pipe installation site narrow space part.

[0014] The device does not produce warping and plastic deformation under the disturbance of the power field of flue gas in high-temperature flue gas operation after fixed use, and the fixing device can firmly fix the pipe on the pipe row during the operation of the boiler, reduces the occurrence of pipe leakage and pipe explosion accidents, and improves the effective utilization hour index value of the unit. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a kind of pipe fixing device of the upper screen type overheat ware of power station boiler combustion chamber of the utility model;

[0016] Figure 2 It is the first comb type plate schematic diagram of the pipe fixing device of the upper screen type overheat ware of power station boiler combustion chamber of the utility model;

[0017] Figure 3 It is the second comb type plate schematic diagram of the pipe fixing device of the upper screen type overheat ware of power station boiler combustion chamber of the utility model.

[0018] As shown in the drawings: 1, first comb type plate;2, second comb type plate;3, arc-shaped groove;4, jack;5, positioning plugboard;6, arc-shaped clamping plate;7, welding plate;8, sunroof groove;1-1, screen type overheat ware row pipe;1-2, the positioning pipe of fluid cooling pipe screen. DETAILED DESCRIPTION

[0019] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0020] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0021] In the description of the embodiments of the utility model, if a certain feature is referred to as "set", "fixed", "connected", "installed" on another feature, it can be directly set, fixed, connected or installed on another feature, or indirectly set, fixed, connected or installed on another feature.

[0022] In the description of the embodiments of the utility model, if "several" is involved, it means more than one, if "a plurality of" is involved, it means more than two, and if "greater than", "less than", "more than" is involved, it should be understood as not including the number, if "and above", "and below", "within" are involved, it should be understood as including the number. If "first" and "second" are involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0023] The utility model will be further described in detail below in combination with the drawings.

[0024] As Figures 1-3As shown in the figure, a kind of tube fixing device of power station boiler combustion chamber upper screen superheater, including two symmetrically arranged first comb plate 1 and two symmetrically arranged second comb plate 2, one first comb plate 1 is arranged in the upside of one second comb plate 2, another first comb plate 1 is arranged in the downside of another second comb plate 2, a plurality of arc grooves 3 capable of being buckled on the tube are arranged on each first comb plate 1 and each second comb plate 2, a plug-in hole 4 between two adjacent arc grooves 3 is arranged on each first comb plate 1 and each second comb plate 2, a positioning plug-in plate 5 is arranged in the plug-in hole 4, arc clamping plates 6 are arranged on the outside of the first comb plate 1 and the second comb plate 2, and welding plates 7 are arranged at the end of each first comb plate 1 and the end of the second comb plate 2 on the opposite side, and the welding plate 7 can be replaced by the positioning plug-in plate 5.

[0025] The first comb plate 1 and the second comb plate 2 on the same side are provided with skylight grooves 8, and the two skylight grooves 8 are buckled to form a skylight hole, for example, when the screen superheater tube 1-1 is shipped from the factory, there is a situation that an iron block protrudes on the tube, which plays a role in separating the screen superheater tube 1-1 and the fluid cooling tube screen positioning tube 1-2, and cannot be cut, so it is necessary to design a deflection.

[0026] The first comb plate 1 and the arc clamping plate 6 thereon are integrally formed, and the second comb plate 2 and the arc clamping plate 6 thereon are integrally formed, and are made of high-temperature-resistant austenitic primary cast, which has oxidation resistance and high-temperature strength.

[0027] The arc clamping plate 6 is designed in a circular arc shape, and the arc angle ranges from 150° to 180°.

[0028] The tube fixing device formed by the arc grooves 3 and the tube fixing device formed by the arc clamping plates 6 are cross-shaped.

[0029] In specific use, as shown in the figure, Figure 1 The arc grooves 3 and the arc clamping plates 6 of the two first comb plates 1 and the two second comb plates 2 are buckled on the screen superheater tube 1-1 and the fluid cooling tube screen positioning tube 1-2, the adjacent arc grooves 3 are separated and positioned by inserting the positioning plug-in plate 5 into the plug-in hole 4, and then the two welding plates 7 are welded at the ends to form a stable and permanent fixing structure, and when it is necessary to remove, only the welded part of the welding plate 7 needs to be removed.

[0030] The arrangement and fixation of the panel superheater row pipe 1-1 and the fluid cooling pipe panel positioning pipe 1-2 are finally completed, the row pipe of the panel superheater row pipe 1-1 and the fluid cooling pipe panel positioning pipe 1-2 is avoided from being disarranged, disordered and deformed, and thus the pipe row wear rate is reduced, the device is not affected by the power field disturbance of the flue gas after being fixedly used, and does not produce warping deformation, in the boiler operation process, the fixing device can well fix the pipe row, and the pipe row leakage and pipe burst accident rate are reduced.

[0031] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired, without departing from the creative purpose of the present application, similar structure modes and embodiments are not creatively designed, which should belong to the protection scope of the present application.

Claims

1. A tube fixing device for the upper screen-type superheater of the combustion chamber of a power plant boiler, characterized in that: It includes two symmetrically arranged first comb plates (1) and two symmetrically arranged second comb plates (2). One first comb plate (1) is located on the upper side of one second comb plate (2), and the other first comb plate (1) is located on the lower side of the other second comb plate (2). Each first comb plate (1) and each second comb plate (2) is provided with several arc-shaped grooves (3) that can fit together and fasten onto the tube. Each first comb plate (1) and each second comb plate (2) is provided with an insertion hole (4) located between two adjacent arc-shaped grooves (3). A positioning insertion plate (5) is provided in the insertion hole (4). Arc-shaped clamping plates (6) are provided on the outer side of the first comb plate (1) and the outer side of the second comb plate (2). Each end of the first comb plate (1) and the end of the second comb plate (2) on the opposite side are provided with welding plates (7).

2. The tube fixing device for the upper screen-type superheater of the combustion chamber of a power plant boiler according to claim 1, characterized in that: Both the first comb plate (1) and the second comb plate (2) on the same side are provided with skylight grooves (8), and the two skylight grooves (8) are fastened together to form a skylight hole.

3. The tube fixing device for the upper screen-type superheater of the combustion chamber of a power plant boiler according to claim 1, characterized in that: The first comb plate (1) and its arc-shaped card plate (6) are integrally formed, and the second comb plate (2) and its arc-shaped card plate (6) are integrally formed.

4. The tube fixing device for the upper screen-type superheater of the combustion chamber of a power plant boiler according to claim 3, characterized in that: The arc-shaped card plate (6) adopts an arc-shaped design with an arc angle range of 150°-180°.

5. A tube fixing device for an upper screen-type superheater in the combustion chamber of a power plant boiler according to claim 3, characterized in that: The tube fixing device formed by the arc-shaped groove (3) and the tube fixing device formed by the arc-shaped clamp (6) are arranged in a cross shape.

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