CN214249555U - Boiler superheater tube bank fixing device and tube bank assembly body - Google Patents
Boiler superheater tube bank fixing device and tube bank assembly body Download PDFInfo
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- CN214249555U CN214249555U CN202022727851.XU CN202022727851U CN214249555U CN 214249555 U CN214249555 U CN 214249555U CN 202022727851 U CN202022727851 U CN 202022727851U CN 214249555 U CN214249555 U CN 214249555U
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Abstract
The utility model discloses a boiler superheater tube bank fixing device and a tube bank assembly body, wherein the superheater tube bank fixing device comprises a middle tube clamp component, the middle tube clamp component comprises a plurality of first tube clamps, the first tube clamps are in an S-shaped structure, the middle parts of the first tube clamps are fixed with the end parts of the adjacent first tube clamps, and two concave parts of the first tube clamps are used for attaching and fixing a first superheater tube and a second superheater tube; the utility model belongs to the technical field of fixing device, the utility model aims to solve among the prior art superheater tube bank fixing device fixed effect not good and hang burnt scheduling problem easily. The technical effects achieved are as follows: the device has simple structure, practicality, firmness and difficult coke hanging.
Description
Technical Field
The utility model relates to a fixing device technical field, concretely relates to boiler over heater bank of tubes fixing device still relates to a bank of tubes dress body.
Background
Most of the existing boilers are closed boilers which are arranged in an n-shaped mode, membrane type water-cooled walls are vertically lifted for multiple times, single-hearth suspension type structures are adopted, a combustion angle is formed in a rear wall, the inclination angle is 55, and the sectional area of each hearth is a distance type. The width is 19.180 meters and the depth is 11.476 meters. The elevation of the central line of the furnace roof shed pipe is 57 meters. In order to consider the suspension of the whole heating surface, the boiler framework is completely made of metal steel frames. The elevation of a large plate beam of a furnace top suspension heating surface is 70 meters, the elevation of the bottom of a furnace bottom ash cooling hopper is 4.2 meters, the inclination angles of the bottoms of front and rear water-cooled walls are 55, and the main technical specifications are as follows:
the superheater adopts three-level arrangement: the stage I platen superheater, the stage II platen superheater and the stage III platen superheater (higher than the superheater).
Stage I platen superheater: the steam and the flue gas are arranged above the hearth, divided into a middle screen and a side screen, and arranged in parallel, and the steam and the flue gas carry out countercurrent heat exchange to form 30X 17 groups with the specification of phi 42X 7 mm. Wherein, the material of the middle screen 14 group is 12Cr1MoG, and the material of each of the two side screens 8 groups is 12Cr18Ni12 Ti. The material of the non-heated part in the ceiling is 12Cr1 MoG.
Stage II platen superheater: the material is 12Cr18Ni12Ti (heated part) and 12Cr1MoVG (non-heated part) in a total of 30X 17 groups with the specification of phi 32X 4mm to 8 mm.
Stage iii platen superheater (super high): and the powder is arranged in the horizontal flue and is positioned after the stage II, and the powder has 102 rows, the specification is phi 42 multiplied by 7mm, and the material is 12Cr18Ni12Ti (heated part) and 12Cr1MoVG (unheated part).
Present superheater bank of tubes fixed mode adopts along superheater bank of tubes direction of height, set up the whole heat-resisting corrosion resistant plate strip of "S" type wave butt clamp fixed mode in bank of tubes both sides layering, heat-resisting corrosion resistant plate strip thickness 4mm to 8mm, rigidity is strong, consequently, the whole heat-resisting corrosion resistant plate strip of "S" type wave is cliied the bank of tubes back, adopt full weld to strengthen the mode of welding at the lath both ends to carry out the bank of tubes and press from both sides tight lath fixed position, and then play the fixed position effect to the superheater bank of tubes.
The design has good use effect in a short period of time after installation, but because the temperature of the flue gas in the superheater area of the boiler is up to 1300 ℃ during operation and the flue gas corrosion working condition caused by high-speed flow impact of the flue gas and pulverized coal combustion exists, meanwhile, the height direction of the superheater tube bank is about 17 meters, the tube bank swings under the impact of high-temperature flue gas, the impact on the 'S-shaped wave whole heat-resistant stainless steel plate strip' opposite clamping type fixing mode is larger, in the past, individual tubes in a tube bank are separated from the fixing of the 'S' -shaped wave whole heat-resistant stainless steel plate strip, welding spots at two ends of the plate strip are welded, the 'S-shaped wave whole heat-resistant stainless steel plate strip' falls off under severe conditions, so that the superheater tube bank is completely fixed, and the phenomena of tube bank tube falling, tube string and tube discharge occur, and the condition that the heat-resistant stainless steel plate strip touches and grinds the heating surface pipe of the superheater is easily caused, so that potential safety hazards exist. Meanwhile, the whole S-shaped wave heat-resistant stainless steel plate strip is loosened and widened, coking is easy to occur at the position of the heat-resistant stainless steel plate strip of the tube bank, when the load of the boiler fluctuates greatly, coke blocks formed at the whole S-shaped wave heat-resistant stainless steel plate strip of the superheater fall off and fall into a hearth cold ash hopper and a slag conveyor, and the coke blocks fall from the height of dozens of meters, so that the water-cooled wall of the hearth cold ash hopper and the water seal of the slag conveyor are easy to crack and leak, and the unplanned shutdown of the boiler or other unsafe events are caused.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides a boiler over heater bank of tubes fixing device and bank of tubes assembly body are in order to solve above-mentioned problem.
In order to achieve the above object, the present invention provides the following technical solutions:
according to the utility model discloses an aspect, a boiler superheater tube bank fixing device, including middle pipe strap subassembly, middle pipe strap subassembly includes a plurality of first pipe straps, and first pipe strap is "S" font structure, and the middle part of first pipe strap is rather than the end fixing of adjacent first pipe strap, and two interior recesses of first pipe strap are used for laminating fixed first superheater pipe and second superheater pipe.
The middle pipe clamp assembly comprises a middle pipe clamp and a middle pipe clamp, wherein the middle pipe clamp assembly comprises a first pipe clamp and a second pipe clamp, the first pipe clamp and the second pipe clamp are fixed at the head end and the tail end of the middle pipe clamp assembly respectively, the first pipe clamp is of a C-shaped structure, one end of the first pipe clamp is fixed in the middle of the first pipe clamp, and the other end of the first pipe clamp is fixed at the end of the first pipe clamp.
Furthermore, one end of the second pipe clamp is welded in the middle of the first pipe clamp, and the other end of the second pipe clamp is welded at the end of the first pipe clamp.
Furthermore, the first pipe clamp and the second pipe clamp are made of high-temperature-resistant stainless steel.
Further, the thickness of the first pipe strap and the second pipe strap is between 4mm and 8 mm.
Further, the radius of curvature of the curved extension lines of the two concave portions of the first pipe clamp is equal to the radius of curvature of the curved extension lines of the second pipe clamp.
Furthermore, the first pipe clamp is composed of two second pipe clamps, and the two second pipe clamps forming the first pipe clamp are in a central symmetry pattern relative to the connection position of the two second pipe clamps.
According to the utility model discloses a second aspect, a bank of tubes dress body uses the utility model discloses a boiler over heater bank of tubes fixing device of any one of the first aspect still includes a plurality of first superheater pipes and a plurality of second superheater pipe, and first superheater pipe and second superheater pipe are interval distribution in turn in proper order, and is fixed through a boiler over heater bank of tubes fixing device between adjacent first superheater pipe and the second superheater.
Further, the radius of curvature of the inner sidewall of the inner recess of the first tube clamp is equal to the outer diameter of the first superheater tube, the radius of curvature of the inner sidewall of the inner recess of the first tube clamp is also equal to the outer diameter of the second superheater tube, and the outer diameter of the first superheater tube is equal to the outer diameter of the second superheater tube.
Further, the axes of the plurality of first superheater tubes and the plurality of second superheater tubes are located in the same plane.
The utility model has the advantages of as follows: the first pipe strap, the first pipe strap and the second pipe strap are made of 1Cr25Ni20Si2 high-temperature-resistant corrosion-resistant stainless steel, the thickness is between 4mm and 8mm, the materials are not special, the market is convenient to purchase, the structure is simple, the processing is simple, and the installation is convenient. Secondly, each pipe of the superheater pipe row is independently and effectively fixed and connected in series in a row, and a longitudinal vertical seam between each small pipe clamp and each small pipe clamp is welded in an enhanced manner, so that after the integral series pipe clamp is formed, the superheater pipe row is high in fixation tightness, high in integral rigidity, neat in pipe row formation, free of deformation, welding failure and compaction, and good in pipe row fixation effect; and thirdly, the longitudinal vertical seam between each pipe clamp and the adjacent pipe clamp is reinforced and welded, the pipe and the pipe clamp are tightly attached, the strength is high, the pipe and the pipe clamp are not easy to deform and fall off, the condition of rubbing the superheater pipe cannot occur, and coke hanging and coking are not easy to occur.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is an overall structure schematic diagram of a tube bank fixing device and a tube bank assembly for a boiler superheater provided by some embodiments of the present invention.
Fig. 2 is a schematic view of a partial structure of a tube bank fixing device and a tube bank assembly for a boiler superheater according to some embodiments of the present invention.
Fig. 3 is a schematic view of a partial structure of a tube bundle fixing device and a tube bundle assembly for a boiler superheater according to some embodiments of the present invention.
Fig. 4 is a schematic view of a portion of a tube bundle assembly of a tube bundle fixing device for a boiler superheater tube bundle according to some embodiments of the present invention.
Fig. 5 is a schematic view of a partial structure of a tube bundle fixing device and a tube bundle assembly for a boiler superheater according to some embodiments of the present invention.
Fig. 6 is a schematic view of a tube bank assembly structure of a tube bank fixing device and a tube bank assembly according to some embodiments of the present invention.
In the figure: 1. a first superheater tube, 2, a second superheater tube, 3, a second tube clamp, 4, a first tube clamp.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 1 to 5, the fixing device for a boiler superheater tube bank in the embodiment includes an intermediate tube clamp assembly, the intermediate tube clamp assembly includes a plurality of first tube clamps 4, the first tube clamps 4 are in an "S" shape, a middle portion of each first tube clamp 4 is fixed to an end portion of an adjacent first tube clamp 4, and two concave portions of each first tube clamp 4 are used for fixing a first superheater tube 1 and a second superheater tube 2 in an abutting manner.
The technical effect that this embodiment reaches does: the device is simple in structure, practical, firm and not easy to hang coke through the arrangement of the first pipe clamp 4.
Example 2
As shown in fig. 1 and 5, the fixing device for a boiler superheater tube bank in the present embodiment includes all the technical features of embodiment 1, and in addition, further includes a second tube clamp 3, two ends of the middle tube clamp assembly are respectively fixed with one second tube clamp 3, the second tube clamp 3 is in a "C" shape, one end of the second tube clamp 3 is fixed in the middle of the first tube clamp 4, and the other end of the second tube clamp 3 is fixed at the end of the first tube clamp 4.
Preferably, one end of the second pipe clamp 3 is welded in the middle of the first pipe clamp 4, and the other end of the second pipe clamp 3 is welded at the end of the first pipe clamp 4.
Preferably, the first pipe clamp 4 and the second pipe clamp 3 are both made of high-temperature-resistant stainless steel.
Preferably, the thickness of the first pipe clamp 4 and the second pipe clamp 3 is between 4mm and 8 mm.
Preferably, the curvature radius of the curved extension line of the two concave parts of the first pipe clamp 4 is equal to the curvature radius of the curved extension line of the second pipe clamp 3.
The beneficial effects in this embodiment are: the first pipe strap 4 and the second pipe strap 3 are made of 1Cr25Ni20Si2 high-temperature-resistant and corrosion-resistant stainless steel, the thickness is 4mm to 8mm, the materials are not special, and the pipe strap is convenient to purchase in the market, simple in structure, simple to process and convenient to assemble.
Example 3
As shown in fig. 1 to 5, the fixing device for a boiler superheater tube bank in the present embodiment includes all the technical features of embodiment 2, in addition, the first tube clamp 4 is composed of two second tube clamps 3, and the two second tube clamps 3 constituting the first tube clamp 4 are in a central symmetry pattern about the connection position of the two second tube clamps.
The beneficial effect that this embodiment reached does: the structural design of the first pipe clamp 4 and the second pipe clamp 3 makes the device more stable.
Example 4
As shown in fig. 6, a tube row assembly in this embodiment uses a boiler superheater tube row fixing device as in any one of embodiments 1 to 3, and in addition, includes a plurality of first superheater tubes 1 and a plurality of second superheater tubes 2, the first superheater tubes 1 and the second superheater tubes 2 are alternately arranged in sequence, and adjacent first superheater tubes 1 and second superheaters are fixed by a boiler superheater tube row fixing device.
Preferably, the radius of curvature of the inner side wall of the inner recess of the first tube clamp 4 is equal to the outer diameter of the first superheater tube 1, the radius of curvature of the inner side wall of the inner recess of the first tube clamp 4 is also equal to the outer diameter of the second superheater tube 2, and the outer diameter of the first superheater tube 1 is equal to the outer diameter of the second superheater tube 2.
Preferably, the axes of the plurality of first superheater tubes 1 and the plurality of second superheater tubes 2 are located in the same plane.
The beneficial effects in this embodiment are: the arrangement of the axes of the first superheater tube 1 and the second superheater tube 2 being in the same plane makes the pipe clamp fit better to the superheater tube.
Example 5
As shown in fig. 1, a fixing device for a superheater tube bank of a boiler in the present embodiment includes a superheater tube bank assembly, a first tube clamp, a second tube clamp, a third tube clamp, a fourth tube clamp, and a fifth tube clamp, where the first tube clamp, the second tube clamp, the third tube clamp, the fourth tube clamp, and the fifth tube clamp are all attached to the superheater tube bank assembly, a right end of the first tube clamp is connected to a right end of the second tube clamp, a left end of the first tube clamp is connected to a middle of the second tube clamp, a left end of the second tube clamp is connected to a middle of the third tube clamp, a right end of the third tube clamp is connected to a middle of the second tube clamp, a left end of the third tube clamp is connected to a middle of the fourth tube clamp, a right end of the fourth tube clamp is connected to a left end of the fifth tube clamp, and a right end of the fifth tube clamp is connected to a middle of the fourth tube clamp; wherein the superheater tube bank assembly includes a first superheater tube, a second superheater tube, a third superheater tube, and a fourth superheater tube, the first, second, third, and fourth superheater tubes are arranged in a row from left to right, the first and second tube clamps enclose the first superheater tube and are in engagement with the first superheater tube, the second and third tube clamps enclose the second superheater tube and are in engagement with the second superheater tube, the third and fourth tube clamps enclose the third superheater tube and are in engagement with the third superheater tube, and the fourth and fifth tube clamps enclose the fourth superheater tube and are in engagement with the fourth superheater tube.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
Claims (10)
1. The fixing device for the boiler superheater tube bank is characterized by comprising an intermediate tube clamp assembly, wherein the intermediate tube clamp assembly comprises a plurality of first tube clamps (4), the first tube clamps (4) are of S-shaped structures, the middle parts of the first tube clamps (4) are fixed with the end parts of the adjacent first tube clamps (4), and two inner concave parts of the first tube clamps (4) are used for fixing a first superheater tube (1) and a second superheater tube (2) in an attaching mode.
2. The boiler superheater tube bank fixing device according to claim 1, further comprising a second tube clamp (3), wherein one second tube clamp (3) is respectively fixed to the head end and the tail end of the middle tube clamp assembly, the second tube clamp (3) is of a C-shaped structure, one end of the second tube clamp (3) is fixed to the middle portion of the first tube clamp (4), and the other end of the second tube clamp (3) is fixed to the end portion of the first tube clamp (4).
3. The boiler superheater tube bank fixing device according to claim 2, wherein one end of the second tube clamp (3) is welded at the middle of the first tube clamp (4), and the other end of the second tube clamp (3) is welded at the end of the first tube clamp (4).
4. The boiler superheater tube bank fixing device according to claim 2, wherein said first tube clamp (4) and said second tube clamp (3) are made of high temperature resistant stainless steel.
5. A boiler superheater tube bank fixing device according to claim 2, characterized in that the thickness of said first tube clamp (4) and said second tube clamp (3) is between 4mm and 8 mm.
6. A boiler superheater tube bank fixing device according to claim 2, characterized in that the radius of curvature of the curved extension line of the two inner recesses of the first tube clamp (4) is equal to the radius of curvature of the curved extension line of the second tube clamp (3).
7. The boiler superheater tube bank fixing device according to claim 6, wherein said first tube clamp (4) is composed of two said second tube clamps (3), and the two said second tube clamps (3) constituting said first tube clamp (4) are formed in a central symmetrical pattern about the junction of the two.
8. A tube bank assembly, comprising a boiler superheater tube bank fixing device as claimed in any one of claims 1 to 7, and further comprising a plurality of first superheater tubes (1) and a plurality of second superheater tubes (2), wherein the first superheater tubes (1) and the second superheater tubes (2) are alternately distributed in sequence, and adjacent first superheater tubes (1) and adjacent second superheater tubes are fixed by a boiler superheater tube bank fixing device.
9. A tube bank assembly according to claim 8, characterized in that the radius of curvature of the inner side wall of the inner recess of the first tube clamp (4) is equal to the outer diameter of the first superheater tube (1), the radius of curvature of the inner side wall of the inner recess of the first tube clamp (4) is also equal to the outer diameter of the second superheater tube (2), and the outer diameter of the first superheater tube (1) is equal to the outer diameter of the second superheater tube (2).
10. A tube bank assembly according to claim 8, characterized in that the axes of a plurality of the first superheater tubes (1) and a plurality of the second superheater tubes (2) are located in the same plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022727851.XU CN214249555U (en) | 2020-11-23 | 2020-11-23 | Boiler superheater tube bank fixing device and tube bank assembly body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022727851.XU CN214249555U (en) | 2020-11-23 | 2020-11-23 | Boiler superheater tube bank fixing device and tube bank assembly body |
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| Publication Number | Publication Date |
|---|---|
| CN214249555U true CN214249555U (en) | 2021-09-21 |
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|---|---|---|---|
| CN202022727851.XU Active CN214249555U (en) | 2020-11-23 | 2020-11-23 | Boiler superheater tube bank fixing device and tube bank assembly body |
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| CN (1) | CN214249555U (en) |
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