CN204717195U - Supercritical unit main steam line skew T - Google Patents
Supercritical unit main steam line skew T Download PDFInfo
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- CN204717195U CN204717195U CN201520376348.0U CN201520376348U CN204717195U CN 204717195 U CN204717195 U CN 204717195U CN 201520376348 U CN201520376348 U CN 201520376348U CN 204717195 U CN204717195 U CN 204717195U
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- threeway
- supervisor
- tee branch
- steam line
- main steam
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Abstract
The utility model discloses a kind of supercritical unit main steam line skew T, it comprises threeway supervisor, and the tee branch be obliquely installed on threeway supervisor, this threeway supervisor and tee branch are linked as an entirety, and the outer tube wall of described threeway supervisor and tee branch is polygon structure; Be provided with pipe shoulder reinforcing part inside the connection of tee branch and threeway supervisor, then connect arc by transition outside the connection that tee branch and threeway are responsible for and be connected.The outer tube wall of described threeway supervisor and tee branch is octagon structure.This main steam line skew T is rational in infrastructure, mechanical property is excellent, and it is shaping to be convenient to solid forging.
Description
Technical field
The utility model relates to nuclear power or thermal power generation unit, particularly relates to the improvement of generator set super critical boiler main-steam outlet skew T structure.
Background technique
Overcritical, ultra supercritical power generation technology in China is an advanced technology, efficiently generation technology, and this technology improves the most effective approach of one of generating set heat efficiency by raising vapor (steam) temperature and pressure parameter.The boiler main steam line pressure of supercritical unit reaches more than 24MPa, and temperature reaches 538 DEG C, and generating efficiency reaches 41%, and the boiler main steam line pressure of supercritical unit reaches 30MPa, and temperature reaches 600 DEG C, and generating efficiency can reach nearly 50%.Therefore no matter be super critical boiler, or ultra-supercritical boiler all bear higher pressure and temperature.
The skew T being positioned at main steam line outlet is the important feature part of steam changed course and shunting, has the feature of major diameter, overlength degree, is in the rugged environment of High Temperature High Pressure for a long time, and bears the pressure jump that alternate load and pipeline eddy current formed.Current main steam line skew T, mostly adopts hot extrusion and welding fabrication technique, is all difficult to by the interior tissue of the skew T body material of hot extrusion and welding fabrication and mechanical property the performance requirement meeting supercritical unit main steam line skew T.Although by the skew T that solid forging is shaping, effectively can improve the internal structural flaw of material theoretically, the defects such as original segregation, loose, pore and slag inclusion can be made in forging process to be able to compacting and seam, material structure is compacter, but existing skew T structural type especially threeway external structure to be not suitable for solid forging shaping, or be difficult to reach target size and structural requirement by solid forging, thus hinder the application of forging manufacturing technique in skew T manufacturing process to a certain extent.
Model utility content
For the above-mentioned deficiency existing for prior art, technical problem to be solved in the utility model be to provide a kind of rational in infrastructure, mechanical property is excellent, and is convenient to the shaping supercritical unit steam line skew T of solid forging.
In order to solve the problems of the technologies described above, supercritical unit main steam line skew T of the present utility model, it comprises threeway supervisor, and the tee branch be obliquely installed on threeway supervisor, this threeway supervisor and tee branch are linked as an entirety, and the outer tube wall of described threeway supervisor and tee branch is polygon structure; Be provided with pipe shoulder reinforcing part inside the connection of tee branch and threeway supervisor, then connect arc by transition outside the connection that tee branch and threeway are responsible for and be connected.
In said structure, because the tube wall gabarit of threeway supervisor and arm is polygon structure, the arm of angle rib that this polygon structure is formed improves rigidity and the mechanical strength of skew T from structure, make skew T can bear pressure and vapor (steam) temperature in higher defeated vapour, also make skew T more can bear alternate load and pressure jump in conveying high temperature and high pressure steam process.Again because threeway supervisor and arm have employed polygonal profile, there is better forgeability, carry out solid forging more easily by the forging molding such as jumping-up, pulling operation and go out skew T, the metal fibrous tissue of forging slanting tee joint is continuous, metal streamline is complete, metal structure is strengthened and refinement, has both avoided the generation of forging defect, can obtain again good forge piece mechanical property.Also owing to being provided with pipe shoulder reinforcing part in the inner side of threeway supervisor and arm joint, both improved the mechanical strength of primary branch joint, turn avoid the generation of joint stress concentration phenomenon.Be connected owing to being connected arc with supervisor side, joint by transition at tee branch again, this level and smooth Placement avoids stress and concentrates, and strengthens the mechanical property of skew T.
Preferred implementation of the present utility model, the outer tube wall of described threeway supervisor and tee branch is octagon structure.The be more convenient for solid forging of skew T of this structure is shaping.
Further mode of execution of the present utility model, the end face of described pipe shoulder reinforcing part is plane, and the upper end of this plane is connected with a faceted pebble of tee branch, and the faceted pebble that lower end and the threeway of this plane are responsible for is connected.Be provided with supervisor's internal groove inside the two pipe end ports of described threeway supervisor, this pipe end port arranged outside has the outer groove of supervisor.This structure is convenient to weld with the firm of steam line.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model supercritical unit steam line skew T is described further.
Fig. 1 is that the master of a kind of embodiment of the utility model supercritical unit steam line skew T cuts open structural representation;
Fig. 2 is the left view of structure shown in Fig. 1;
Fig. 3 is the partial enlarged view of in structure shown in Fig. 1 I;
Fig. 4 is the partial enlarged view of in structure shown in Fig. 1 II.
In figure, 1-threeway supervisor, 2-pipe shoulder reinforcing part, 3-arm internal groove, the outer groove of 4-arm, 5-tee branch, 6-transition connect arc, the outer groove of 7-supervisor, 8-supervisor internal groove.
Embodiment
As shown in Figure 1 and Figure 2, this skew T is used in 1000MW level ultra supercritical unit main steam line, adopts solid forging shaping, and threeway supervisor 1 and tee branch 5 forging are integrated, and forging steel ingot material is martensite heat-resistant steel.In this skew T structure, the tube hub line of threeway supervisor 1 tilts arranged in a crossed manner with the tube hub line being located at the tee branch 5 that threeway is responsible on 1 mutually, and its two centerlines is 45 °.The total length of threeway supervisor 1 is 3000 mm, the total length of tee branch 5 is 1800mm, it is 650 mm that 1 inner orifice diameter is responsible in threeway, the inner orifice diameter of tee branch 5 is 500 mm, the outer tube wall of threeway supervisor 1 and tee branch 5 is octagon structure, distance 580 mm between the parallel faceted pebble that tee branch 5 is relative.
Inside the connection being responsible for 1 in tee branch 5 and threeway, (be responsible for, arm center line crossing angle be acute angle side) is provided with pipe and takes on reinforcing part 2, the end face of pipe shoulder reinforcing part 2 is plane, the upper end portion of this plane is connected with the corresponding faceted pebble of tee branch 5, the corresponding faceted pebble that underpart and the threeway of this plane are responsible for 1 is connected, formation is responsible for 1 corresponding faceted pebble from threeway and is takeed on through pipe the folding face that reinforcing part 2 end face extends to the corresponding faceted pebble of tee branch 5, and it is 45 ° that pipe shoulder reinforcing part 2 end face is responsible for 1 corresponding faceted pebble angle with threeway.This structure had both been beneficial to and had strengthened its mechanical strength, facilitated forging molding again.
Tee branch 5 is then connected arc by transition with the outside of the joint of threeway supervisor 1 and is connected, and being namely responsible for 1 except takeing on the corresponding faceted pebble of reinforcing part 2 with pipe at tee branch 5 and threeway is all be connected the mutual transitions smooth of arc 6 by transition to connect.The radius of arc that this transition connects arc 6 should be selected in 250 mm-350 mm.
As shown in Figure 1, Figure 3, have the outer groove 4 of the arm for welding in the pipe end port arranged outside of tee branch 5, be provided with arm internal groove 3 inside it, the groove docked with it forms U-shaped butting grooves.As Figure 1 and Figure 4, be provided with the outer groove 7 of supervisor outside the port being responsible for 1 two ends in threeway, be then provided with inside it and be responsible for internal groove 8, they and its butting grooves form U-shaped butting grooves.
Above-mentionedly enumerated preferred implementations more of the present utility model, but the utility model is not limited to this.When without prejudice to having other improvement and conversion when the utility model basic principle.If the butt welding groove of pipe end is except for except U-shaped, can also be the butting grooves forms such as V-type, X-type or Y type.The outer tube wall of threeway supervisor 1 and tee branch 5, except in positive octagon, can also be regular hexagon, can be even square or regualr decagon etc.Supervisor and the intersecting angle of arm are also limited to 45 ° etc. simultaneously.
Claims (9)
1. a supercritical unit main steam line skew T, comprise threeway supervisor (1), and the tee branch (5) be obliquely installed in threeway supervisor (1), this threeway supervisor (1) and tee branch (5) are linked as an entirety, it is characterized in that: the outer tube wall of described threeway supervisor (1) and tee branch (5) is polygon structure; Be provided with pipe shoulder reinforcing part (2) inside the connection of tee branch (5) and threeway supervisor (1), then connect arc (6) by transition outside tee branch (5) is responsible for (1) connection with threeway and be connected.
2. supercritical unit main steam line skew T according to claim 1, is characterized in that: the outer tube wall of described threeway supervisor (1) and tee branch (5) is octagon structure.
3. supercritical unit main steam line skew T according to claim 1 and 2, it is characterized in that: the end face of described pipe shoulder reinforcing part (2) is plane, the upper end of this plane is connected with a faceted pebble of tee branch (5), and (1) is responsible in the lower end of this plane faceted pebble with threeway is connected.
4. supercritical unit main steam line skew T according to claim 3, is characterized in that: described pipe shoulder reinforcing part (2) end face is responsible for (1) faceted pebble angle with the threeway be connected be 45 °.
5. supercritical unit main steam line skew T according to claim 1, is characterized in that: described transition connects radius of arc R=250 mm-350 mm of arc (6).
6. supercritical unit main steam line skew T according to claim 1, is characterized in that: be provided with arm internal groove (3) inside the pipe end port of described tee branch (5), and this pipe end port arranged outside has the outer groove (4) of arm.
7. supercritical unit main steam line skew T according to claim 1, is characterized in that: be provided with supervisor's internal groove (8) inside two pipe end ports of described threeway supervisor (1), this pipe end port arranged outside has the outer groove of supervisor (7).
8. supercritical unit main steam line skew T according to claim 1, is characterized in that: described threeway supervisor's center line of (1) and the centerlines of tee branch (5) are 45 °.
9. supercritical unit main steam line skew T according to claim 1, is characterized in that: the outer tube wall of described threeway supervisor (1) and tee branch (5) is regular hexagon structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520376348.0U CN204717195U (en) | 2015-06-03 | 2015-06-03 | Supercritical unit main steam line skew T |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520376348.0U CN204717195U (en) | 2015-06-03 | 2015-06-03 | Supercritical unit main steam line skew T |
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| CN204717195U true CN204717195U (en) | 2015-10-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689257A (en) * | 2016-08-05 | 2018-02-13 | 苏州热工研究院有限公司 | A kind of branch coupling systems for tubes for being used to solve nuclear power plant steam pipeline erosion |
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2015
- 2015-06-03 CN CN201520376348.0U patent/CN204717195U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689257A (en) * | 2016-08-05 | 2018-02-13 | 苏州热工研究院有限公司 | A kind of branch coupling systems for tubes for being used to solve nuclear power plant steam pipeline erosion |
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