CN213179516U - Flow guide device in condenser connecting neck - Google Patents
Flow guide device in condenser connecting neck Download PDFInfo
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- CN213179516U CN213179516U CN202021535480.9U CN202021535480U CN213179516U CN 213179516 U CN213179516 U CN 213179516U CN 202021535480 U CN202021535480 U CN 202021535480U CN 213179516 U CN213179516 U CN 213179516U
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Abstract
The utility model provides a pair of guiding device in condenser connects neck, include: steam turbines, condensers; the steam turbine is communicated with the condenser through a connecting neck; the upper half part of the connecting neck is provided with a flow guide ring, the bottom of the flow guide ring is provided with a flow guide plate group, a flow distribution plate group is arranged below the flow guide plate group, the flow distribution plate group is provided with a first plate group and a second plate group, the arc-shaped plates are uniformly distributed on one side of the axis of the connecting neck, and the first plate group and the second plate group are symmetrically distributed on a virtual plane where the axis is located; the virtual surface is vertical to the plate surface of the guide plate; and each arc-shaped plate bends towards the direction far away from the virtual surface; the size of the opening at the bottom of the flow guide ring is matched with the size of the top of the working area. Adopt the embodiment of the utility model provides a condenser connects guiding device in the neck can reduce the exhaust vortex of condenser throat, and even condenser connects the flow field of neck export, will be favorable to the evenly distributed of low reaches condenser heat load.
Description
Technical Field
The utility model relates to an energy electric power technical field especially relates to a guiding device in condenser connects neck.
Background
The condenser of the power station is an important auxiliary machine in a cold end system of a steam turbine, and the condenser neck is one of important components of the condenser. The condenser connects neck upper supporting steam turbine's steam exhaust cylinder, connects the condenser body down, and is the halfpace shape usually, and simultaneously, power station condenser connects neck inside still often has arranged low pressure heater, steam extraction pipeline etc. for power station condenser connects neck and has played the effect that flow transition, diffusion and part held. The condenser neck is complex in geometric structure, and particularly diffusion flow caused by a step shape and bypass flow caused by a large-size low-pressure heater cause a flow phenomenon that a neck outlet flow field is unevenly distributed. The design of the condenser body at the downstream of the condenser neck is usually performed under the condition that steam uniformly flows in, however, the existing condenser has an uneven inlet flow field and low working performance, and therefore, the internal structure of the condenser neck needs to be improved to improve the uniformity of the outlet flow field of the condenser neck.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems that in the prior art, the flow field of an inlet of an existing condenser is not uniform, and the working performance of the condenser is low. The embodiment of the utility model provides a guiding device in condenser connects neck, concrete technical scheme is as follows:
the embodiment of the utility model provides a flow guiding device in a condenser connecting neck, a steam turbine and a condenser; the steam turbine is communicated with the condenser through a connecting neck; a guide ring is arranged on the upper half part of the connecting neck, a guide plate group is arranged at the bottom of the guide ring and consists of a plurality of guide plates, the guide plates are parallel to each other, and the plate surface of each guide plate is parallel to the axis of the connecting neck; a flow distribution plate group is arranged below the flow guide plate group, the flow distribution plate group comprises a first plate group and a second plate group, the first plate group and the second plate group are identical in structure, the first plate group comprises a plurality of arc-shaped plates, the arc-shaped plates are uniformly distributed on one side of the axis of the connecting neck, and the first plate group and the second plate group are symmetrically distributed on a virtual plane where the axis is located; the virtual surface is vertical to the plate surface of the guide plate; and each arc-shaped plate bends towards the direction far away from the virtual surface;
the overlapping area of the flow distribution plate group and the flow guide plate group along the axis direction is a working area;
the side wall of the guide ring is provided with a plurality of guide vanes which are uniformly distributed on the guide ring, and the size of the bottom opening of the guide ring is matched with the size of the top of the working area.
Optionally, the flow dividing plate group, the flow guide ring and the flow guide plate group are all arranged on the upper half part of the connecting neck.
Optionally, the material of the flow distribution plate is stainless steel; the material of the flow guide ring is stainless steel; the guide plate is made of stainless steel.
Optionally, the deflector ring is welded to an inner side wall of the neck.
Optionally, the flow guide plate assembly is fixed on the support tube, and the flow distribution plate assembly is welded at the bottom of the flow guide plate assembly.
Optionally, the device further comprises a support tube; the supporting tube penetrates through the guide plate, a plurality of clips are arranged on the supporting tube, one clip is arranged on each of two sides of each guide plate, and the clips are used for limiting the displacement of each guide plate along the axial direction of the supporting tube; the clamp is fixed by a bolt; the supporting tube is fixed on the inner side wall of the connecting neck.
Optionally, the bolt is a standard bolt of class 8.8.
Optionally, the bolt is a self-locking nut or a flanging anti-loosening gasket.
The embodiment of the utility model provides a guiding device in a condenser connecting neck, which comprises a steam turbine and a condenser; the steam turbine is communicated with the condenser through a connecting neck; the upper half part of the connecting neck is provided with a guide ring, the bottom of the guide ring is provided with a guide plate group, the guide plate group consists of a plurality of guide plates, the guide plates are mutually parallel, and the plate surfaces of the guide plates are parallel to the axis of the connecting neck; the flow distribution plate group is arranged below the flow guide plate group and comprises a first plate group and a second plate group, the first plate group and the second plate group are identical in structure, the first plate group comprises a plurality of arc-shaped plates, the arc-shaped plates are uniformly distributed on one side of the axis of the connecting neck, and the first plate group and the second plate group are symmetrically distributed on a virtual plane where the axis is located; the virtual surface is vertical to the plate surface of the guide plate; and each arc-shaped plate bends towards the direction far away from the virtual surface; the overlapping area of the flow distribution plate group and the flow guide plate group along the axial direction is a working area; the side wall of the guide ring is provided with a plurality of guide vanes which are uniformly distributed on the guide ring, and the size of the bottom opening of the guide ring is matched with the size of the top of the working area.
In practical application, via steam turbine exhaust high-pressure gas, get into the condenser through connecing the neck, the setting is connecing the neck first partial guide ring to carry out the water conservancy diversion to the high-pressure gas who gets into the condenser, because the bottom opening of guide ring and the top adaptation of workspace, consequently, under the water conservancy diversion effect of guide ring, above-mentioned high-pressure gas most gets into the workspace, under the water conservancy diversion effect that is on a parallel with the guide plate that connects the neck axis, above-mentioned high-pressure gas is rationally distributed, under the shunting effect via the flow distribution plate group that sets up in the flow distribution plate group bottom, above-mentioned high-pressure gas dispersion gets into to the condenser in, adopt the utility model discloses the condenser that provides connects the guiding device in the neck can reduce the exhaust vortex of condenser throat, and even condenser connects the flow field of neck export, will be favorable to the evenly distributed of low reaches condenser heat load.
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.
Fig. 1 is a schematic structural view of a flow guiding device in a condenser neck according to an embodiment of the present invention;
fig. 2 is a schematic view of an installation structure of a flow guide plate set and a flow distribution plate set according to an embodiment of the present invention;
fig. 3 is a schematic view of an installation structure of another flow guide plate group and a flow distribution plate group according to an embodiment of the present invention;
fig. 4 is a schematic view of an installation overlooking structure of the flow guide plate group and the flow distribution plate group provided by the embodiment of the present invention;
fig. 5 is a schematic structural view of a clip according to an embodiment of the present invention.
Reference numerals:
the device comprises a condenser 1, a flow guide ring 2, a flow guide plate group 3, a flow guide plate 4, a flow distribution plate group 5, a first plate group 6, a second plate group 7, an arc-shaped plate 8, a steam turbine 9, a working area 10, flow guide plates 11, a support pipe 12, clamps 13, bolts 14 and a connecting neck 15.
Detailed Description
The technical solution in the embodiment of the present invention will be described below with reference to the accompanying drawings in the embodiment of the present invention.
The results of foreign authoritative tests show that the heat exchange coefficient of the steam side of the cooling pipe of the condenser 1 rises along with the rise of the steam flow speed, and reaches the highest value when the steam flow speed is 40-50 m/s, the steam flow speed continues to rise, and the heat exchange coefficient of the steam side does not change any more. It can be concluded from this that if a large low-velocity zone exists in the steam flow field at the inlet of the cooling tube bundle of the condenser 1, the heat exchange coefficient of this zone is necessarily small. If measures are taken to distribute part of steam in a high-speed steam flow (speed is higher than 50m/s) area to the low-speed area (corresponding to peak clipping and valley filling), the heat exchange coefficient of the tube bundle in the area is increased. Thus, the overall heat transfer coefficient and the heat exchange effect of the condenser 1 are surely enhanced.
Under the optimized distribution of the steam flow field, the longitudinal and transverse heat load distribution of the cooling tube bundle of the condenser 1 is reasonable, which is equivalent to increase the effective heat exchange area of the condenser 1 and improve the overall heat exchange coefficient of the condenser 1, and finally the purposes of improving the heat exchange performance of the condenser 1 and reducing the exhaust pressure to improve the unit economy are achieved.
Referring to fig. 1 to 5, an embodiment of the present invention provides a flow guiding device in a condenser neck, including a steam turbine 9 and a condenser 1; the steam turbine 9 is communicated with the condenser 1 through a neck 15; a guide ring 2 is arranged at the upper half part of the connecting neck 15, a guide plate group 3 is arranged at the bottom of the guide ring 2, the guide plate group 3 is composed of a plurality of guide plate groups 3, the guide plates 4 are parallel to each other, and the plate surface of each guide plate 4 is parallel to the axis of the connecting neck 15; a flow distribution plate group 5 is arranged below the flow guide plate group 3, the flow distribution plate group 5 comprises a first plate group 6 and a second plate group 7, the first plate group 6 and the second plate group 7 have the same structure, the first plate group 6 comprises a plurality of arc-shaped plates 8, the arc-shaped plates 8 are uniformly distributed on one side of the axis of the connecting neck 15, and the first plate group 6 and the second plate group 7 are symmetrically distributed on a virtual plane where the axis is located; the virtual surface is perpendicular to the plate surface of the guide plate 4; and each arc-shaped plate 8 bends towards the direction far away from the virtual surface; the overlapping area of the flow distribution plate group 5 and the flow guide plate group 3 along the axial direction is a working area 10; the side wall of the guide ring 2 is provided with a plurality of guide vanes 11, the guide vanes 11 are uniformly distributed on the guide ring 2, and the size of the bottom opening of the guide ring 2 is matched with the size of the top of the working area 10.
Based on the starting point, the project adopts professional model construction and grid division tool software to construct the whole exhaust channel model including the low-pressure cylinder, and utilizes authority software special for Computational Fluid Dynamics (CFD) to perform simulation research on the steam flow field of the exhaust channel. According to the steam flow field distribution condition of the tube bundle inlet of the condenser 1 in the original structure obtained through simulation calculation, a flow guide ring 2, a flow guide plate group 3 and a flow distribution plate group 5 are installed at proper positions in a connecting neck 15 of the condenser 1 in a targeted manner, the original steam flow is guided appropriately, the steam flow field is optimized, and the steam flow field of the steam turbine 9 in which the exhausted steam enters the cooling tube bundle tends to be reasonable. Under the optimized distribution of the steam flow field, the longitudinal and transverse heat load distribution of the cooling tube bundle of the condenser 1 is reasonable, which is equivalent to increase the effective heat exchange area of the condenser 1 and improve the overall heat exchange coefficient of the condenser 1, and finally the purposes of improving the heat exchange performance of the condenser 1 and reducing the exhaust pressure to improve the unit economy are achieved. All the flow guide plates 4 are arranged in a semi-cuboid connecting neck 15 on the condenser 1; each guide plate 4 in the guide plate group 3 is made of stainless steel, so that the guide plate is resistant to scouring, and the normal service life of the guide plate group reaches more than 20 years. The rooting position of the flow guide device is a supporting tube 12 in a connecting neck 15 of the condenser 1, and the supporting tube 12 which can be directly utilized is not arranged in the connecting neck 15 of the condenser 1, so that the supporting tube 12 needs to be additionally installed for fixing the flow guide device. The guide plate group 3 and the support tube 12 are reliably connected through the pipe clamp 13 and the bolt 14, wherein the clamp 13 can be obtained by direct purchase, the structure of the guide plate group can be as shown in fig. 5, in practical application, the clamp 13 is sleeved on the side wall of the support tube 12, then the clamp 13 is moved to a preset position, the bolt 14 is used for locking the clamp 13, the clamp 13 has the function of limiting the movement of the guide plate 4 along the axial direction of the support tube 12, specifically, as a preferred embodiment, the support tube 12 penetrates through the middle part of the top side wall of each guide plate 4, and two sides of each guide plate 4 are respectively provided with one clamp 13. The bolt 14 is an 8.8-grade standard bolt 14, so that the strength and reliability are ensured, and the locking of the bolt 14 is realized by a self-locking nut or a flanging locking washer; in the condenser 1 neck 15, a construction side lays a springboard and flame-retardant floor leather below an operation part and above a heat exchanger of the condenser 1 to protect a cooling pipe of the condenser 1.
In practical application, high-pressure gas exhausted by the turbine 9 enters the condenser 1 through the neck 15, the guide ring 2 arranged at the upper half part of the neck 15 guides the high-pressure gas entering the condenser 1, and as the bottom opening of the guide ring 2 is matched with the top of the working area 10, under the guide action of the guide ring 2, most of the high-pressure gas enters the working area 10, and under the guide action of the guide plate 4 parallel to the axis of the connecting neck 15, the high-pressure gas is reasonably distributed, under the shunting action of the flow distribution plate group 5 arranged at the bottom of the flow guide plate group 3, the high-pressure gas is dispersed and enters the condenser 1, the flow guide device in the condenser neck provided by the embodiment of the utility model is adopted, the exhaust eddy flow of the throat part of the condenser 1 can be reduced, and the flow field of the outlet of the neck 15 of the uniform condenser 1 is beneficial to the uniform distribution of the heat load of the downstream condenser 1.
In one embodiment, the splitter plate group 5, the deflector ring 2, and the deflector plate group 3 are disposed on the upper half of the neck 15.
In one embodiment, the material of the flow distribution plate is stainless steel; the material of the flow guide ring 2 is stainless steel; the guide plate 4 is made of stainless steel.
In one embodiment, the deflector ring 2 is welded to the inner sidewall of the neck 15.
In a specific embodiment, the flow guide plate group 3 further comprises a support pipe 12, the flow guide plate group 3 is fixed on the support pipe 12, and the flow guide plate group 5 is welded at the bottom of the flow guide plate group 3.
In one embodiment, referring to fig. 3, a support tube 12 is further included; the support tube 12 penetrates through the guide plate 4, a plurality of clips 13 are arranged on the support tube 12, one clip 13 is arranged on each of two sides of each guide plate 4, and the clips 13 are used for limiting the displacement of each guide plate 4 along the axial direction of the support tube 12; the clip 13 is fixed by a bolt 14; the support tube 12 is fixed to the inner side wall of the neck 15.
In one embodiment, the bolts 14 are 8.8 grade standard bolts 14.
In one embodiment, the bolt 14 is a self-locking nut or a flanging anti-loosening washer.
The embodiment of the utility model provides a guiding device in a condenser connecting neck, which comprises a steam turbine 9 and a condenser 1; the steam turbine 9 is communicated with the condenser 1 through a neck 15; the upper half part of the connecting neck 15 is provided with a guide ring 2, the bottom of the guide ring 2 is provided with a guide plate group 3, the guide plate group 3 consists of a plurality of guide plate groups 3, all the guide plates 4 are parallel to each other, and the plate surface of each guide plate 4 is parallel to the axis of the connecting neck 15; a flow distribution plate group 5 is arranged below the flow guide plate group 3, the flow distribution plate group 5 is provided with a first plate group 6 and a second plate group 7, the first plate group 6 and the second plate group 7 have the same structure, the first plate group 6 comprises a plurality of arc-shaped plates 8, the arc-shaped plates 8 are uniformly distributed on one side of the axis of the connecting neck 15, and the first plate group 6 and the second plate group 7 are symmetrically distributed on a virtual plane where the axis is located; the virtual surface is vertical to the plate surface of the guide plate 4; and each arc-shaped plate 8 bends towards the direction far away from the virtual surface; the overlapping area of the flow distribution plate group 5 and the flow guide plate group 3 along the axial direction is a working area 10; the side wall of the guide ring 2 is provided with a plurality of guide vanes 11, the guide vanes 11 are uniformly distributed on the guide ring 2, and the size of the bottom opening of the guide ring 2 is matched with the size of the top of the working area 10.
In practical application, high-pressure gas exhausted by the turbine 9 enters the condenser 1 through the neck 15, the guide ring 2 arranged at the upper half part of the neck 15 guides the high-pressure gas entering the condenser 1, and as the bottom opening of the guide ring 2 is matched with the top of the working area 10, under the guide action of the guide ring 2, most of the high-pressure gas enters the working area 10, and under the guide action of the guide plate 4 parallel to the axis of the connecting neck 15, the high-pressure gas is reasonably distributed, under the shunting action of the flow distribution plate group 5 arranged at the bottom of the flow guide plate group 3, the high-pressure gas is dispersed and enters the condenser 1, the flow guide device in the condenser neck provided by the embodiment of the utility model is adopted, the exhaust eddy flow of the throat part of the condenser 1 can be reduced, and the flow field of the outlet of the neck 15 of the uniform condenser 1 is beneficial to the uniform distribution of the heat load of the downstream condenser 1.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (8)
1. A flow guide device in a condenser connecting neck comprises a steam turbine and a condenser; the steam turbine is communicated with the condenser through a connecting neck; the connecting neck is characterized in that a guide ring is arranged on the upper half part of the connecting neck, a guide plate group is arranged at the bottom of the guide ring and consists of a plurality of guide plates, the guide plates are parallel to each other, and the plate surfaces of the guide plates are parallel to the axis of the connecting neck; a flow distribution plate group is arranged below the flow guide plate group, the flow distribution plate group comprises a first plate group and a second plate group, the first plate group and the second plate group are identical in structure, the first plate group comprises a plurality of arc-shaped plates, the arc-shaped plates are uniformly distributed on one side of the axis of the connecting neck, and the first plate group and the second plate group are symmetrically distributed on a virtual plane where the axis is located; the virtual surface is vertical to the plate surface of the guide plate; and each arc-shaped plate bends towards the direction far away from the virtual surface;
the overlapping area of the flow distribution plate group and the flow guide plate group along the axis direction is a working area;
the side wall of the guide ring is provided with a plurality of guide vanes which are uniformly distributed on the guide ring, and the size of the bottom opening of the guide ring is matched with the size of the top of the working area.
2. The flow guide device in the condenser neck of claim 1, wherein the flow distribution plate group, the flow guide ring and the flow guide plate group are all arranged on the upper half part of the neck.
3. The flow guiding device in the condenser neck according to claim 1, wherein the flow dividing plate is made of stainless steel; the material of the flow guide ring is stainless steel; the guide plate is made of stainless steel.
4. The flow guide device in a condenser neck of claim 1, wherein the flow guide ring is welded on an inner side wall of the neck.
5. The flow guide device in the condenser neck of claim 1, further comprising a support tube, wherein the flow guide plate group is fixed on the support tube, and the flow distribution plate group is welded at the bottom of the flow guide plate group.
6. The flow guide device in the condenser neck of claim 5, further comprising a support tube; the supporting tube penetrates through the guide plate, a plurality of clips are arranged on the supporting tube, one clip is arranged on each of two sides of each guide plate, and the clips are used for limiting the displacement of each guide plate along the axial direction of the supporting tube; the clamp is fixed by a bolt; the supporting tube is fixed on the inner side wall of the connecting neck.
7. The flow guide device in a condenser neck of claim 6, wherein the bolt is a standard bolt of 8.8 grade.
8. The flow guide device in the condenser neck according to claim 6, wherein the bolt is a self-locking nut or a flanging anti-loosening gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021535480.9U CN213179516U (en) | 2020-07-29 | 2020-07-29 | Flow guide device in condenser connecting neck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021535480.9U CN213179516U (en) | 2020-07-29 | 2020-07-29 | Flow guide device in condenser connecting neck |
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| CN213179516U true CN213179516U (en) | 2021-05-11 |
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| CN202021535480.9U Active CN213179516U (en) | 2020-07-29 | 2020-07-29 | Flow guide device in condenser connecting neck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251952A (en) * | 2021-12-01 | 2022-03-29 | 东方电气集团东方汽轮机有限公司 | Flow guide structure and flow guide method for condenser |
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2020
- 2020-07-29 CN CN202021535480.9U patent/CN213179516U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251952A (en) * | 2021-12-01 | 2022-03-29 | 东方电气集团东方汽轮机有限公司 | Flow guide structure and flow guide method for condenser |
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