CN210179597U - Supercritical unit boiler header - Google Patents
Supercritical unit boiler header Download PDFInfo
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- CN210179597U CN210179597U CN201921156442.XU CN201921156442U CN210179597U CN 210179597 U CN210179597 U CN 210179597U CN 201921156442 U CN201921156442 U CN 201921156442U CN 210179597 U CN210179597 U CN 210179597U
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- header
- welding
- welding head
- pipe joint
- soldered connection
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- 238000003466 welding Methods 0.000 claims abstract description 157
- 239000000956 alloy Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- Arc Welding In General (AREA)
Abstract
The utility model discloses a supercritical unit boiler header, including header body, welding mound, first soldered connection, header pipe joint and second soldered connection, header body lateral part is equipped with the welding mound, is equipped with the T shape hole in the middle of the welding mound, first soldered connection embedding is installed in T shape downthehole, first soldered connection and header pipe joint fixed connection, header pipe joint and second soldered connection fixed connection, and third soldered connection has been inlayed at second soldered connection top, through second welding seam fixed connection, third soldered connection and superheater pipe fixed connection between second soldered connection and the third soldered connection. The utility model has the advantages that: based on the defects in the background art, the boiler header which is high temperature and high pressure resistant, free of damage during welding and convenient to position is provided, the supercritical high temperature and high pressure requirements can be met, and the secondary welding can be performed without damage to the header, a header pipe joint, a boiler superheater and a boiler reheater during welding.
Description
Technical Field
The utility model relates to a supercritical unit technical field especially relates to a supercritical unit boiler collection case.
Background
The supercritical unit of the thermal power plant refers to a unit in which the parameter of the working medium in the boiler reaches or exceeds the critical pressure. The working media in the boiler are all water, the critical pressure of the water is 22.129MPa, and the critical temperature is 374.15 ℃; at the pressure and the temperature, the densities of water vapor compressed due to high-temperature expansion and water vapor compressed due to high pressure are the same, namely the critical point of water, the pressure of a working medium in the boiler is lower than the pressure, namely a subcritical boiler, the pressure is higher than the pressure, namely a supercritical boiler, and the temperature of the steam in the boiler is not lower than 593 ℃ or the steam pressure is not lower than 31MPa, namely the supercritical boiler.
At present, the boiler with the highest pressure, the highest temperature and the highest efficiency in the world has steam temperature of 605-. The boiler header under the supercritical unit needs to bear high temperature and high pressure, and the header contains header body and header pipe joint, and in current header, header body and header pipe joint itself all can bear high temperature and high pressure, and its weakest part lies in header body and header pipe joint's the welding point, header pipe joint and boiler superheater's the welding point, header pipe joint and boiler reheater's welding point. The existing welding treatment mode adopted by the header body and the header pipe joint is to directly abut the header pipe joint against an opening on the periphery of the header for seamless welding, the existing welding treatment mode adopted by the header pipe joint and the boiler superheater is to directly abut the header pipe joint against the end part of the boiler superheater for seamless welding, and the existing welding treatment mode adopted by the header pipe joint and the boiler reheater is to directly abut the header pipe joint against the end part of the boiler reheater for seamless welding; the welding mode has the advantages that the welding is inconvenient, the welding efficiency is low, the quality of a welding seam is directly influenced, and the parallelism among the pipe joints of the plurality of headers is poor; during welding, the high-temperature welding liquid can melt the metal part contacted with the high-temperature welding liquid, so that the thickness of the welding part of the header, the header pipe joint, the boiler superheater and the boiler reheater is reduced, and the high-temperature high-pressure effect of the supercritical unit cannot be borne.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a supercritical unit boiler collection case, based on the defect in the background art, provide a high temperature and high pressure resistant, welding not damaged, the boiler collection case of being convenient for location, not only can reach supercritical high temperature and high pressure requirement, to collection case, collection case coupling, boiler superheater and boiler reheater not damaged, can also carry out the secondary welding use during the welding moreover.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a supercritical unit boiler header, includes header body, welding mound, first soldered connection, header pipe joint and second soldered connection, and header body lateral part is equipped with the welding mound, is equipped with the T shape hole in the middle of the welding mound, first soldered connection embedding is installed in T shape downthehole, first soldered connection and header pipe joint fixed connection, header pipe joint and second soldered connection fixed connection, and third soldered connection has been inlayed at second soldered connection top, through second welding seam fixed connection, third soldered connection and superheater pipe fixed connection between second soldered connection and the third soldered connection.
Furthermore, the header body is made of a G large-caliber pipe.
Furthermore, the T-shaped hole comprises a steam outlet and a limiting blind hole, the limiting blind hole is formed in the middle of the welding pier, the bottom of the limiting blind hole is communicated with the interior of the header body through the steam outlet, the height of the steam outlet is larger than the wall thickness of the header body, and the diameter of the steam outlet is smaller than that of the limiting blind hole.
Further, the first welding head, the header pipe joint, the second welding head, the third welding head and the superheater pipe are all made of TPH alloy materials, and the TPH alloy materials are composed of main components of iron and alloy components.
Furthermore, the header body and the T-shaped hole are fixedly and integrally connected, the first welding head, the header pipe joint and the second welding head are fixedly and integrally connected, and the third welding head and the superheater pipe are fixedly connected.
Furthermore, the upper end of the second welding head is provided with a limiting groove, the lower end of the third welding head is provided with a limiting ring, and the limiting ring is embedded in the limiting groove.
Further, the T-shaped hole, the first welding head, the header pipe joint, the second welding head, the third welding head and the superheater pipe are identical in inner diameter.
Compared with the prior art, the utility model discloses following beneficial effect has: one is as follows: according to the boiler header provided by the scheme, the welding pier is arranged at the top of the header body, the first welding head is integrally arranged at the lower end of the header pipe joint, when the first welding line is welded, one layer of welding pier and the first welding head can be melted, after the surface of the welding pier is melted, the thinnest position thickness of the welding pier is larger than the wall thickness of the header body, and after the surface of the first welding head is melted, the thinnest position thickness of the first welding head is larger than the wall thickness of the header pipe joint, so that the weakest joint between the welding pier and the first welding head can resist high temperature and high pressure during supercritical; similarly, when the second welding seam is welded, a layer of second welding head and a layer of third welding head can be melted, after the surface of the second welding head is melted, the thinnest position of the second welding head is thicker than the wall thickness of the header pipe joint, and after the surface of the third welding head is melted, the thinnest position of the third welding head is thicker than the wall thickness of the superheater pipe, so that the weakest joint between the second welding head and the third welding head can resist high temperature and high pressure during supercritical. The second step is as follows: in order to facilitate welding and installation, the limiting blind hole is formed, when the welding pier and the first welding head are connected and installed, the first welding head only needs to be embedded into the limiting blind hole, the whole parallelism degree formed by the first welding heads, the header pipe joint and the second welding head can be guaranteed, the first welding head can be guaranteed not to move during welding, the welding difficulty is reduced, and the welding seam quality is improved. In a similar way, when the second welding head and the third welding head are welded, the limiting ring at the lower end of the third welding head is embedded into the limiting groove above the second welding head, and then the second welding head and the third welding head are connected together through the second welding line, so that the welding difficulty is reduced, and the welding quality is improved. And thirdly: the boiler header that this scheme provided can also carry out the secondary and use, when superheater or reheater in the boiler need be changed, can cut off first welding seam completely with welding mound top parallel cut one deck to take out first soldered connection, will weld the mound and polish smooth back, still can carry out the secondary and use.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
fig. 2 is a partial cross-sectional view of the present invention;
FIG. 3 is a front view of the present invention;
FIG. 4 is a cross-sectional view of the header body and the welded pier of the present invention;
FIG. 5 is an overall cross-sectional view of a first weld joint, header coupling and second weld joint of the present invention;
fig. 6 is an overall cross-sectional view of a third weld joint and superheater tube of the present invention;
in the figure: 1. a header body; 2. a T-shaped hole; 2-1, a steam outlet; 2-2, limiting blind holes; 3. welding piers; 4. a first weld; 5. a first welding head; 6. a header pipe joint; 7. a second welding head; 7-1, a limiting groove; 8. a second weld; 9. a third welding head; 9-1, a limiting ring; 10. a superheater tube.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1-6, a header of a supercritical unit boiler comprises a header body 1, a welding pier 3, a first welding head 5, a header pipe joint 6 and a second welding head 7, wherein the welding pier 3 is arranged on the side of the header body 1, a T-shaped hole 2 is formed in the middle of the welding pier 3, the first welding head 5 is embedded in the T-shaped hole 2, the first welding head 5 is fixedly connected with the header pipe joint 6, the header pipe joint 6 is fixedly connected with the second welding head 7, a third welding head 9 is embedded at the top of the second welding head 7, the second welding head 7 is fixedly connected with the third welding head 9 through a second welding line 8, and the third welding head 9 is fixedly connected with a superheater pipe 10.
Wherein, the header body 1 is made of G115 large-caliber pipes. The alloy composition of the G115 large-caliber pipe comprises 7-9% of Cr, 3-5% of W and 2.5-4% of Co.
The T-shaped hole 2 comprises a steam outlet 2-1 and a limiting blind hole 2-2, the limiting blind hole 2-2 is formed in the middle of the welding pier 3, the bottom of the limiting blind hole 2-2 is communicated with the interior of the header body 1 through the steam outlet 2-1, the height of the steam outlet 2-1 is larger than the wall thickness of the header body 1, and the diameter of the steam outlet 2-1 is smaller than that of the limiting blind hole 2-2.
The first welding head 5, the header pipe joint 6, the second welding head 7, the third welding head 9 and the superheater pipe 10 are made of TP347H alloy material, and the TP347H alloy material is composed of main component iron and alloy components. The alloy comprises 16-19% of Cr, 8-14% of Ni and 0.5-1.1% of Nb.
The header body 1 and the T-shaped hole 2 are fixedly and integrally connected, the first welding head 5, the header pipe joint 6 and the second welding head 7 are fixedly and integrally connected, and the third welding head 9 and the superheater pipe 10 are fixedly connected.
The upper end of the second welding head 7 is provided with a limiting groove 7-1, the lower end of the third welding head 9 is provided with a limiting ring 9-1, and the limiting ring 9-1 is embedded in the limiting groove 7-1.
Wherein the T-shaped hole 2, the first welding head 5, the header pipe joint 6, the second welding head 7, the third welding head 9 and the superheater pipe 10 have the same inner diameter.
It should be noted that the utility model relates to a supercritical unit boiler header, it is like this work: the header body 1 and the welding pier 3 are integrated parts, the first welding head 5, the header pipe joint 6 and the second welding head 7 are integrated parts, and the third welding head 9 and the superheater pipe 10 are integrated parts. Firstly, welding and mounting the welding pier 3 and the first welding head 5, embedding the outer end of the first welding head 5 into the limiting blind hole 2-2 during mounting, and welding a first welding seam 4 between the welding pier 3 and the first welding head 5. Then, the second welding head 7 and the third welding head 9 are installed, a limiting ring 9-1 at the lower end of the third welding head 9 is embedded into a limiting groove 7-1 at the top of the second welding head 7 during installation, and a second welding seam 8 is welded between the second welding head 7 and the third welding head 9. The installation process is completed.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. The utility model provides a supercritical unit boiler header, includes header body, welding mound, first soldered connection, header coupling and second soldered connection, its characterized in that: the side part of the header body is provided with a welding pier, a T-shaped hole is formed in the middle of the welding pier, the first welding head is embedded in the T-shaped hole, the first welding head is fixedly connected with the header pipe joint, the header pipe joint is fixedly connected with the second welding head, the top of the second welding head is embedded with the third welding head, the second welding head is fixedly connected with the third welding head through the second welding line, and the third welding head is fixedly connected with the superheater pipe.
2. The header of a supercritical unit boiler according to claim 1, characterized by: the header body is made of a G large-caliber pipe.
3. The header of a supercritical unit boiler according to claim 1, characterized by: the T-shaped hole comprises a steam outlet and a limiting blind hole, the limiting blind hole is formed in the middle of the welding pier, the bottom of the limiting blind hole is communicated with the inside of the header body through the steam outlet, the height of the steam outlet is larger than the wall thickness of the header body, and the diameter of the steam outlet is smaller than that of the limiting blind hole.
4. The header of a supercritical unit boiler according to claim 1, characterized by: the first welding head, the header pipe joint, the second welding head, the third welding head and the superheater pipe are all made of TPH alloy materials, and the TPH alloy materials are made of iron and alloy.
5. The header of a supercritical unit boiler according to claim 1, characterized by: the header body and the T-shaped hole are connected in a fixed integrated mode, the first welding head, the header pipe joint and the second welding head are connected in a fixed integrated mode, and the third welding head and the superheater pipe are fixedly connected.
6. The header of a supercritical unit boiler according to claim 5, wherein: the upper end of the second welding head is provided with a limiting groove, the lower end of the third welding head is provided with a limiting ring, and the limiting ring is embedded in the limiting groove.
7. The header of a supercritical unit boiler according to claim 1, characterized by: the inner diameters of the T-shaped hole, the first welding head, the header pipe joint, the second welding head, the third welding head and the superheater pipe are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921156442.XU CN210179597U (en) | 2019-07-23 | 2019-07-23 | Supercritical unit boiler header |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921156442.XU CN210179597U (en) | 2019-07-23 | 2019-07-23 | Supercritical unit boiler header |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210179597U true CN210179597U (en) | 2020-03-24 |
Family
ID=69841398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921156442.XU Expired - Fee Related CN210179597U (en) | 2019-07-23 | 2019-07-23 | Supercritical unit boiler header |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210179597U (en) |
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2019
- 2019-07-23 CN CN201921156442.XU patent/CN210179597U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200324 |