CN218379363U - Reheater ceiling pipe penetrating device based on corrugated sealing sleeve technology - Google Patents
Reheater ceiling pipe penetrating device based on corrugated sealing sleeve technology Download PDFInfo
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- CN218379363U CN218379363U CN202222328077.4U CN202222328077U CN218379363U CN 218379363 U CN218379363 U CN 218379363U CN 202222328077 U CN202222328077 U CN 202222328077U CN 218379363 U CN218379363 U CN 218379363U
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Abstract
The utility model belongs to the technical field of generating set boiler equipment, specifically a ceiling pipe device is worn to re-heater based on ripple seal cover technique. Two ceiling superheater pipes that a plurality of low temperature reheat pipes and the horizontal direction that include vertical setting set up, ceiling superheater pipe set up in low temperature reheat pipe both sides, the welding has the sleeve pipe on the low temperature reheat pipe, and the welding has the seal assembly that can stretch out and draw back on the sleeve pipe. The utility model discloses an increase seal cover expansion deformation volume and improve a welding seam structural stress, very big reduction the fracture risk of low temperature re-heater piercing ceiling pipe sealing weld.
Description
Technical Field
The utility model belongs to the technical field of generating set boiler equipment, specifically a ceiling pipe device is worn to re-heater based on ripple seal cover technique.
Background
Some generator set boiler reheat steam systems are composed of a low-temperature reheater and a high-temperature reheater, and exhaust steam of a high-pressure cylinder of a steam turbine is heated from 325 ℃ to 540 ℃ through two-stage heating in operation. The method comprises the following steps that firstly, cold-section reheater steam passes through a cold-section reheater reheating steam pipeline, is subjected to low-temperature reheater coiled pipe treatment by a low-temperature reheater inlet header, then enters a high-temperature reheater inlet header, a high-temperature reheater coiled pipe treatment and a high-temperature reheater outlet header through a low-temperature reheater outlet header, and finally, a hot-section reheating steam pipeline on the high-temperature reheater outlet header is used for performing work on a steam turbine intermediate pressure cylinder to drive a steam turbine to generate power.
In the series of step-by-step heating processes, a reheater ceiling-through pipe is used as an important component for connecting a high-temperature heating surface in the furnace and a header in a ladle outside the furnace, the reheater ceiling-through pipe bears high temperature roasting at the temperature of about 2000 ℃ and the weight of a pipe bank with the height of tens of meters in the furnace, the reheater ceiling-through pipe is connected with an inlet header and an outlet header outside the furnace and bears upward expansion stress of the headers, meanwhile, absolute sealing between the inside and the outside of the furnace is achieved, and various complex stresses such as pipe bank gravity, heating surface expansion thermal stress, welding stress of a sealing housing and the like are borne during operation. Under the background of peak shaving operation and frequent start-stop of the generator set, the components with the complicated stress structure do not fully consider the problem of expansion of the tube bank and the problem of a welding structure of the sealing sleeve during design, so that the leakage defect caused by cracks of the sealing weld seam appears for many times during the period of maintenance and hydrostatic test of the generator set, and the operation safety and the reliability of the generator set are seriously influenced.
In the operation of the boiler reheater of the generator set, because the wall thickness of the boiler tube is relatively low, the position of the tube penetrating the ceiling is simultaneously subjected to high-frequency shaking caused by the disturbance of the flue gas in the boiler and the stress of a welding structure of the sealing cover, the cracking tendency of the sealing weld of the boiler tube at the position of the tube penetrating the ceiling is obvious, and the leakage of the boiler tube is easily caused by the damage of the welding weld and the penetration of the ceiling tube of the reheater. Meanwhile, in the process of a hydraulic test after unit repair, the reheater tube panel is of a suspension structure integrally, and a ceiling penetrating tube at the fixed end of the top of the reheater tube panel bears a large amount of weight of demineralized water, so that a welding seam of a ceiling penetrating tube sealing cover cracks due to sudden increase of tensile stress, and further a reheater tube section at the position of the ceiling penetrating tube cracks due to cracks to damage the tube, and furnace tube leakage is caused.
Disclosure of Invention
The utility model discloses an above-mentioned problem of mentioning in the solution background art provides a ceiling pipe device is worn to re-heater based on ripple seal cover technique.
The utility model adopts the following technical proposal: the utility model provides a reheater wears ceiling pipe device based on ripple seal cover technique, includes two ceiling superheater pipes that a plurality of low temperature reheat pipes of vertical setting and horizontal direction set up, and ceiling superheater pipe sets up in low temperature reheat pipe both sides, the welding has the sleeve pipe on the low temperature reheat pipe, and the welding has the seal assembly that can stretch out and draw back on the sleeve pipe.
In some embodiments, the sealing assembly includes a sealing plate welded on the sleeve, the sealing plate is horizontally arranged, an opening through which the sleeve can pass is formed in the sealing plate, corrugated plates are welded on two sides of the sealing plate, a cover plate is welded between the corrugated plates on two sides, and the corrugated plates and the bottom of the cover plate are welded and sealed with the furnace roof plate.
In some embodiments, the upper portion of the sleeve is welded to the low temperature reheat tube and the lower portion of the sleeve is not welded so that it can expand freely.
In some embodiments, the sealing plate is welded at the middle position of the sleeve, and two side edges of the sealing plate are inclined downwards to form an included angle of less than 180 degrees.
In some embodiments, the sleeve and seal assembly are integrally higher than the ceiling superheater tube.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses an increase seal cover expansion deformation volume and improve a welding seam structural stress, very big reduction the fracture risk that the low temperature reheater worn ceiling tube seal welding seam, realized basically because of wearing "zero risk" target that ceiling tube seal welding seam fracture initiation unit unplanned shut down, gained and improved generating set operational safety and reliability, solved the boiler and received the supervision inspection difficult problem that the ceiling tube seal welding seam was worn to the hot side, reduced generating set maintenance work load and expense and showed the effect.
Due to the characteristics of dense tube bundle arrangement, more sealing structural parts and narrow inspection space of the ceiling-penetrating tube on the heating surface of the boiler, the problems of more nondestructive inspection blind areas and large risk of early crack back chipping and tube damage of the monitoring and inspection of the sealing weld joint of the ceiling-penetrating tube are caused, and the requirement of unit safety management cannot be met by the conventional monitoring and inspection. The utility model discloses the sealing boot based on ripple preparation is worn the ceiling pipe and is used for wearing ceiling pipe seal cover welding seam atress characteristic and having obtained greatly improving the sight, stopped basically because the boiler tube inefficacy problem that the welding seam atress ftracture leads to, make the above-mentioned inspection difficult problem of supervise obtain effectively solving.
The utility model discloses wear the application of ceiling pipe at generating set boiler for low temperature reheater wears ceiling pipe seal weld no longer receives the influence that the pipe screen rocked, welded structure stress and hydrostatic test demineralized water bearing, has stopped basically because of wearing ceiling pipe seal weld fracture to hinder and the generating set unplanned shutdown accident that the boiler tube leads to, great improvement generating set operational safety nature and reliability.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a side view of the present invention;
in the figure, 1-low temperature reheater tube, 2-ceiling superheater tube, 3-sleeve tube, 4-sealing plate, 5-corrugated plate and 6-cover plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; 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.
As shown in fig. 1, a reheater ceiling pipe penetrating device based on a corrugated sealing sleeve technology comprises a plurality of low-temperature reheater pipes 1 which are vertically arranged and two ceiling superheater pipes 2 which are horizontally arranged, wherein the ceiling superheater pipes 2 are arranged on two sides of the low-temperature reheater pipes 1, sleeves 3 are welded on the low-temperature reheater pipes 1, the upper parts of the sleeves 3 are welded with the low-temperature reheater pipes 1, and the lower parts of the sleeves 3 can be freely expanded without welding. A telescopic sealing assembly is welded on the sleeve 3.
The sealing assembly comprises a sealing plate 4 welded on a sleeve 3, the sealing plate 4 is horizontally arranged, an opening through which the sleeve 3 can pass is formed in the sealing plate 4, corrugated plates 5 are welded on two sides of the sealing plate 4, a cover plate 6 is welded between the corrugated plates 5 on two sides, and the bottoms of the corrugated plates 5 and the cover plate 6 are welded and sealed with a furnace roof plate.
The sealing plate 4 is welded in the middle of the sleeve 3, and two side edges of the sealing plate 4 are inclined downwards to form an included angle smaller than 180 degrees.
The sleeve 3 and the sealing assembly are integrally higher than the ceiling superheater tubes 2.
The utility model discloses, at first produce the expansion joint through the buckled plate 5 that utilizes the seal assembly both sides, increased the sealing boot at the elasticity and the deflection when receiving the exogenic action, secondly, through interior sleeve pipe 3 in the middle of the design seal boot, realize the welding of welding seam on sleeve pipe 3 and the seal assembly, avoided the seal boot to wear the direct welding of ceiling pipe with the re-heater, improved the welding seam atress characteristic that the ceiling pipe was worn to the re-heater. Due to the structural design of the two aspects, the risk of furnace tube leakage caused by stress cracking of sealing welding seams of the reheater ceiling-penetrating tubes is greatly reduced.
The structure, proportion, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people skilled in the art, and are not used for limiting the limit conditions of the present invention, so that the present invention does not have the essential significance in technology, and the modification of any structure, the change of proportion relation or the adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (5)
1. The utility model provides a reheater wears ceiling pipe device based on ripple seal cover technique, includes two ceiling superheater pipe (2) that a plurality of low temperature reheat pipes (1) of vertical setting and horizontal direction set up, and ceiling superheater pipe (2) set up in low temperature reheat pipe (1) both sides, its characterized in that: the low-temperature reheater pipe (1) is welded with a sleeve (3), and the sleeve (3) is welded with a telescopic sealing assembly.
2. The reheater ceiling-tube installation based on bellows gland technology according to claim 1, characterized in that: the sealing assembly comprises a sealing plate (4) welded on a sleeve (3), the sealing plate (4) is arranged in the horizontal direction, an opening through which the sleeve (3) can penetrate is formed in the sealing plate (4), corrugated plates (5) are welded on two sides of the sealing plate (4), a cover plate (6) is welded between the corrugated plates (5) on two sides, and the bottoms of the corrugated plates (5) and the cover plate (6) are welded and sealed with a furnace roof plate.
3. The reheater ceiling tube piercing apparatus based on bellows seal cartridge technology as claimed in claim 2, wherein: the upper part of the sleeve (3) is welded with the low-temperature reheater pipe (1), and the lower part of the sleeve (3) can be freely expanded without welding.
4. The reheater ceiling tube piercing apparatus based on bellows seal cartridge technology as claimed in claim 2, wherein: the sealing plate (4) is welded in the middle of the sleeve (3), and two side edges of the sealing plate (4) are inclined downwards to form an included angle smaller than 180 degrees.
5. The reheater ceiling tube piercing apparatus based on bellows seal cartridge technology as claimed in claim 1, wherein: the sleeve (3) and the sealing assembly are integrally higher than the ceiling superheater tube (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222328077.4U CN218379363U (en) | 2022-09-02 | 2022-09-02 | Reheater ceiling pipe penetrating device based on corrugated sealing sleeve technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222328077.4U CN218379363U (en) | 2022-09-02 | 2022-09-02 | Reheater ceiling pipe penetrating device based on corrugated sealing sleeve technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218379363U true CN218379363U (en) | 2023-01-24 |
Family
ID=84971867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222328077.4U Active CN218379363U (en) | 2022-09-02 | 2022-09-02 | Reheater ceiling pipe penetrating device based on corrugated sealing sleeve technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218379363U (en) |
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2022
- 2022-09-02 CN CN202222328077.4U patent/CN218379363U/en active Active
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