CN214273749U - Exhaust gas connects neck - Google Patents
Exhaust gas connects neck Download PDFInfo
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- CN214273749U CN214273749U CN202022959875.8U CN202022959875U CN214273749U CN 214273749 U CN214273749 U CN 214273749U CN 202022959875 U CN202022959875 U CN 202022959875U CN 214273749 U CN214273749 U CN 214273749U
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Abstract
The utility model provides a steam extraction connects neck, include: the steam turbine comprises a first cavity, wherein a first steam inlet is formed in the top of the first cavity, a first steam outlet is formed in the side portion of the first cavity, a second cavity is formed in the second cavity, a second steam inlet is formed in the side portion of the second cavity, a second steam outlet is formed in the bottom of the second cavity, the first steam inlet is communicated with a steam exhaust port of a steam turbine, the first steam outlet is communicated with the second steam inlet, and the second steam outlet is communicated with an inlet of a steam condenser. The utility model discloses in the use, from the steam turbine steam extraction exhaust steam flow through first steam inlet get into first cavity, get into the second cavity through first steam outlet, second steam inlet again, go out the steam port from the second at last and emit into the condenser entry, realize the smooth and easy transition of steam flow from steam turbine steam extraction exhaust steam port to the condenser entry. Adopt the utility model discloses a steam extraction connects neck because first steam inlet and second play steam ports are not on same axis to can communicate steam turbine steam extraction mouth and the condenser entry that exists axial dystopy.
Description
Technical Field
The utility model relates to a steam turbine exhaust technical field especially relates to a steam extraction connects neck.
Background
Along with the increasing demand of the modification market of the power industry in recent years, the unit modification diversification and the complexity degree are increasingly prominent. Market research finds that the awareness of each large power plant on energy conservation and emission reduction of the unit is stronger, and more power plants have the demand on the improvement of the existing service unit. On one hand, the reason is that the unit is long in operation time, the unit is seriously aged, and the experience of the original design is insufficient; on the other hand, with the continuous improvement of the design and manufacturing level of the steam turbine, users put forward higher requirements on the operation of the unit. Although the market of the modified unit is large, users put higher requirements on the design capability of a manufacturing plant, such as low modification cost, high utilization rate of a basic platform, high utilization rate of equipment and the like. Different energy-saving technical transformation schemes are often required to be equipped according to different power plant conditions. However, in order to reduce the reconstruction cost of the plant and improve the utilization rate of the existing equipment, the old resources (such as the condenser and the like) need to be fully utilized as much as possible, which often causes the deviation of the exhaust central line, and the axial dislocation exists between the inlet of the old condenser and the exhaust port of the new turbine.
SUMMERY OF THE UTILITY MODEL
In view of the above shortcoming of the prior art, the to-be-solved technical problem of the utility model is to provide a steam extraction connects neck, can communicate steam turbine steam extraction mouth and the condenser entry that exists the axial dystopy.
In order to solve the technical problem, the utility model provides an exhaust connects neck, include: the steam turbine comprises a first cavity, wherein a first steam inlet is formed in the top of the first cavity, a first steam outlet is formed in the side portion of the first cavity, a second cavity is formed in the side portion of the second cavity, a second steam inlet is formed in the side portion of the second cavity, a second steam outlet is formed in the bottom of the second cavity, the first steam inlet is communicated with a steam exhaust port of a steam turbine, the first steam outlet is communicated with the second steam inlet, and the second steam outlet is communicated with a steam condenser inlet.
Preferably, the first cavity and the second cavity are both internally provided with a support rod.
Preferably, the first cavity is provided with an access manhole.
Preferably, a connecting flange is mounted at the top of the second cavity and connected with the common chassis through bolts.
Preferably, the first cavity and the second cavity are connected through a bearing plate.
Preferably, a guide plate is installed inside the second cavity, the upper end of the guide plate is connected with the top of the second cavity, the lower end of the guide plate is connected with the side of the second cavity, and the guide side of the guide plate faces the second steam inlet and the second steam outlet.
As mentioned above, the utility model discloses a steam extraction connects neck has following beneficial effect:
the utility model discloses in the use, from the steam turbine steam extraction exhaust steam flow through first steam inlet get into first cavity, get into the second cavity through first steam outlet, second steam inlet again, go out the steam port from the second at last and emit into the condenser entry, realize the smooth and easy transition of steam flow from steam turbine steam extraction exhaust steam port to the condenser entry. Adopt the utility model discloses a steam extraction connects neck because first steam inlet and second play steam ports are not on same axis to can communicate steam turbine steam extraction mouth and the condenser entry that exists axial dystopy.
Drawings
Fig. 1 is a schematic view of an embodiment of the present invention showing a steam discharge connecting neck at a viewing angle;
fig. 2 is a schematic view of an embodiment of the present invention showing a steam discharging neck at another viewing angle.
Description of the reference numerals
1 first chamber
101 first steam inlet
110 straight side plate
120 arc-shaped plate
102 manhole
2 second Chamber
201 second steam outlet
210 inclined side plate
3 trapezoidal force bearing plate
4 connecting flange
5 support rod
6 guide plate
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to the attached drawings. It should be understood that the structure, ratio, 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 those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve.
As shown in fig. 1-2, the utility model provides a steam exhaust joint neck, include: the steam turbine comprises a first cavity 1, wherein a first steam inlet 101 is formed in the top of the first cavity 1, a first steam outlet is formed in the side portion of the first cavity 1, a second cavity 2 is formed in the side portion of the second cavity 2, a second steam inlet is formed in the side portion of the second cavity 2, a second steam outlet 201 is formed in the bottom of the second cavity 2, the first steam inlet 101 is communicated with a steam exhaust port of a steam turbine, the first steam outlet is communicated with the second steam inlet, and the second steam outlet 201 is communicated with an inlet of a steam condenser.
The utility model discloses in the use, from the steam turbine steam extraction exhaust steam flow through first steam inlet 101 get into first cavity 1, get into second cavity 2 through first steam outlet, second steam inlet again, go out steam outlet 201 from the second at last and discharge into the condenser entry, realize the smooth and easy transition of steam flow from steam turbine steam extraction to condenser entry. Adopt the utility model discloses a steam extraction connects neck because first steam inlet 101 and second steam outlet 201 are not on same axis to can communicate steam turbine steam extraction mouth and the condenser entry that exists the axial dystopy.
In this embodiment, the first cavity 1 is formed by welding two straight side plates 110 and two arc plates 120 with different bending radians, the inspection manhole 102 is respectively installed in the middle area of the two straight side plates 110, and after an inspection cover plate on the inspection manhole 102 is opened, the installation work of the steam exhaust joint and the steam exhaust cylinder, the subsequent inspection and the like can be performed. The second cavity 2 is formed by welding a top plate and four inclined side plates 210, a second steam inlet is formed on the inclined side plate 210 close to the first cavity 1, the first steam outlet and the second steam inlet are welded together, and the first cavity 1 and the second cavity 2 are connected into a whole.
Specifically, the thicknesses of the straight side plate 110, the arc-shaped plates 120 and the inclined side plate 210 in this embodiment are all 16mm, the bending radii of the two arc-shaped plates 120 are 500mm and 1300mm respectively, and the thickness of the top plate is 25 mm.
The outside of steam extraction connects the neck has welded the bearing board of connecting first cavity 1 and second cavity 2, and the bearing board can strengthen the anti deformability that the steam extraction connects the neck, avoids connecting the neck because of the negative pressure effect leads to the steam extraction to connect the neck to warp and the too big problem of first cavity 1 and 2 intermediate junction part stress peak value of second cavity to appear, and is concrete, and the bearing board includes five trapezoidal bearing boards 3, and the thickness of trapezoidal bearing board 3 is 20mm, and the interval between two adjacent trapezoidal bearing boards 3 is 350 mm.
Connecting flange 4 is installed at the top of second cavity 2, and connecting flange 4 passes through bolted connection with public chassis to reduce the power and the moment to steam turbine steam extraction mouth, reduce the unfavorable risk of unit stability. Specifically, the connecting flange 4 is provided with a threaded hole of M36.
Because the steam exhaust joint neck is always in a negative pressure running state, the wall thickness of the first cavity 1 and the wall thickness of the second cavity 2 are reasonably selected, and meanwhile, the support rod 5 is additionally arranged inside the first cavity 1 and the second cavity 2. When the supporting rods 5 are arranged, enough space is reserved to meet the field installation, and the occurrence of instability of the pressure rod is avoided, and the plurality of supporting rods 5 are arranged in a grid shape. In particular, to avoid the buckling of the pressure bar, the specification of the support bar 5 in the connecting area of the first cavity 1 and the second cavity 2 is selected as
The other areas are selected as
The steam flows along the flow channel in the steam discharging connecting neck, and momentum change can be generated. In order to reduce steam disturbance, reduce pipeline pressure loss and improve unit performance, a guide plate 6 is arranged at a sudden change position (namely the second cavity 2) of a flow channel, so that exhaust steam flows to a condenser more smoothly, and exhaust loss is reduced. The upper end of guide plate 6 and the top welding of second cavity 2, the lower extreme of guide plate 6 and the lateral part welding of second cavity 2, the water conservancy diversion side of guide plate 6 is towards second steam inlet and second steam outlet 201, and guide plate 6 has the triangle-shaped structure of stability in the inside formation geometry of second cavity 2, has strengthened the stability of structure. Specifically, the thickness of the guide plate 6 is 16mm, the guide plate 6 is arc-shaped, and in order to avoid the support rods 5 and reduce the intersection, the guide plate 6 is split into five pieces, as shown in fig. 2.
Besides the structure form, the ectopic steam exhaust connecting neck with the inlet and the outlet not at the same axial position can be realized through flexible connection.
The utility model discloses a novel board pipe combination, assembly pattern absorb the displacement restraint of importing and exporting through self flexibility. And by means of the connecting flange 4, the exhaust connecting neck is subjected to non-full-freedom constraint (only vertical constraint and axial free sliding), the adverse effect of thermal expansion on the stability of the cylinder of the exhaust connecting neck is reduced, and the axial free sliding of the exhaust connecting neck is ensured.
An object of the utility model is to provide a go into, export not at the dystopy steam extraction of same axial position and connect design method and structure of neck, aim at solving the technical problem who reforms transform the unchangeable, the steam extraction central line skew of unit in-process condenser position, realize that the steam extraction that goes into, export not at same axial position connects the inside steam flow of neck smooth and easy transition, and guarantee that its operation is stable, energy loss is few etc. technical characterstic.
The utility model provides an at the in-process of reforming transform unit, there is the off-normal technical problem of axial in old condenser entry and new turbine steam extraction mouth, has realized the smooth and easy transition of steam flow, reduces unnecessary performance loss. The condenser position moving and the related foundation transformation are avoided in the unit transformation process, the transformation cost of a power plant is reduced, and the transformation period of the power plant is shortened.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. An exhaust neck, comprising:
a first cavity, wherein the top of the first cavity is provided with a first steam inlet, the side part of the first cavity is provided with a first steam outlet,
the steam turbine comprises a second cavity, wherein a second steam inlet is formed in the side part of the second cavity, a second steam outlet is formed in the bottom of the second cavity, the first steam inlet is communicated with a steam exhaust port of a steam turbine, the first steam outlet is communicated with the second steam inlet, and the second steam outlet is communicated with an inlet of a steam condenser.
2. The exhaust neck of claim 1, wherein: the supporting rods are arranged in the first cavity and the second cavity.
3. The exhaust neck of claim 1, wherein: and an inspection manhole is arranged on the first cavity.
4. The exhaust neck of claim 1, wherein: and a connecting flange is arranged at the top of the second cavity and is connected with the public chassis through bolts.
5. The exhaust neck of claim 1, wherein: the first cavity and the second cavity are connected through a bearing plate.
6. The exhaust neck of claim 1, wherein: the inside mounting of second cavity has the guide plate, the upper end of guide plate with the top of second cavity is connected, the lower extreme of guide plate with the lateral part of second cavity is connected, the water conservancy diversion side of guide plate is towards second steam inlet and second steam outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022959875.8U CN214273749U (en) | 2020-12-09 | 2020-12-09 | Exhaust gas connects neck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022959875.8U CN214273749U (en) | 2020-12-09 | 2020-12-09 | Exhaust gas connects neck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214273749U true CN214273749U (en) | 2021-09-24 |
Family
ID=77780778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022959875.8U Active CN214273749U (en) | 2020-12-09 | 2020-12-09 | Exhaust gas connects neck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214273749U (en) |
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2020
- 2020-12-09 CN CN202022959875.8U patent/CN214273749U/en active Active
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