CN108195506A - A kind of condenser vacuum measuring device for large and medium-sized Steam Turbine - Google Patents
A kind of condenser vacuum measuring device for large and medium-sized Steam Turbine Download PDFInfo
- Publication number
- CN108195506A CN108195506A CN201810067975.4A CN201810067975A CN108195506A CN 108195506 A CN108195506 A CN 108195506A CN 201810067975 A CN201810067975 A CN 201810067975A CN 108195506 A CN108195506 A CN 108195506A
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- vacuum
- pipeline
- condenser
- sample pipeline
- vacuum sample
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000005070 sampling Methods 0.000 claims abstract description 50
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 28
- 238000000605 extraction Methods 0.000 claims abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 14
- 239000000523 sample Substances 0.000 description 77
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L21/00—Vacuum gauges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The application discloses a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine, and the throat including being used for from condenser tilts upward the first vacuum sample pipeline of extraction；For the hydrophobic pipeline drawn upwards from the bottom hot well of condenser；The water collect tank of ponding for being connected respectively with the outlet of the first vacuum sample pipeline and the hydrophobic pipeline, being discharged for collection from the first vacuum sample pipeline；The second vacuum sample pipeline being connected at the top of the water collect tank.Using the device, there is no descending branch in the sampling line formed due to the vacuum sample pipeline and the second vacuum sample pipeline, therefore ponding is not easy to assemble in sampling line, is not easy to form water column；Again since the water collect tank and the hydrophobic pipeline can discharge the ponding in sampling line, ponding in sampling line is made to tail off, water column can not be formed.Therefore, sampling line will not generate additonal pressure, reduce the measurement error of condenser vacuum, accuracy just increases.
Description
Technical field
The present invention relates to vacuum measurement technical field, a kind of more particularly to condenser for large and medium-sized Steam Turbine is true
Reciprocal of duty cycle measuring device.
Background technology
Large and medium-sized heat transmission equipment of the condenser as thermal power plant, working performance directly affect entire Steam Turbine
Safety, reliability and economy.In condenser normal course of operation, since turbine discharge condenses suddenly in condenser
Into water, its specific volume is made, which drastically to reduce, to be caused to generate vacuum in condenser.Condenser vacuum can not only reflect the work of condenser
Make performance, and be also one of large and medium-sized Steam Turbine safety, economical, the important indicator that steadily runs.However, actually making
With in the process, lead to condenser vacuum due to cooling tower water shortage or water temperature raising, heat exchange tube of condenser fouling etc.
Decline, condenser exhaust steam pressure and temperature is made to be increased, it is excessively negative so as to cause the increase of steam turbine axial thrust, exhaust stage blade
A series of problems, such as lotus.Therefore, accurately and reliably measuring condenser vacuum is just particularly important.
In view of existing condenser vacuum measuring device is usually designed and installs according to normal pressures sampling mode,
Several sample points are installed in condenser upper design, the steam working medium with negative pressure is through a valve, secondary inside condenser
Transmitter, pressure switch are supplied to after valve, condenser vacuum measures probe tube Louis ponding, easily leads to Steam Turbine protection act
And tripping grinder accident is caused, because measured deviation is big especially under the conditions of low-vacuum-operating, influence condenser vacuum measurement
Accuracy.
Invention content
In view of this, the purpose of the present invention is to provide a kind of condenser vacuum measurements for large and medium-sized Steam Turbine
Device can effectively improve the accuracy of condenser vacuum measurement.
Its concrete scheme is as follows：
The present invention provides a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine, including：
For tilting upward the first vacuum sample pipeline of extraction from the throat of condenser；
For the hydrophobic pipeline drawn upwards from the bottom hot well of condenser；
It is connected respectively with the outlet of the first vacuum sample pipeline and the hydrophobic pipeline, for collecting from described first
The water collect tank of the ponding of vacuum sample pipeline discharge；
The second vacuum sample pipeline being connected at the top of the water collect tank.
Preferably, the first vacuum sample pipeline includes：
For tilting upward the inclination vacuum sample pipeline of extraction from the throat of condenser；
The vertical vacuum sample pipeline for being connected and upwardly extending in the vertical direction with the inclination vacuum sample pipeline；
It is connected between the top of the vertical vacuum sample pipeline and the water collect tank and extends in the horizontal direction
Horizontal vacuum sampling line；
Sampling on the horizontal vacuum sampling line, for controlling the sampling amount of the horizontal vacuum sampling line
Valve.
Preferably, the angular range tilted between vacuum sample pipeline and horizontal line is 30 °~45 °.
Preferably, the water collect tank is cylinder.
Preferably, the side of the water collect tank open up there are two for connect the first vacuum sample pipeline side peace
Fill hole.
Preferably, pacify there are two being opened up at the top of the water collect tank for connecting the top surface of the second vacuum sample pipeline
Fill hole.
Preferably, the bottom of the water collect tank opens up that there are one for connecting the bottom surface mounting hole of the hydrophobic pipeline.
Preferably, the pipeline diameter of the first vacuum sample pipeline is respectively greater than the hydrophobic pipeline and described second very
The pipeline diameter of empty sampling line.
Preferably, it further includes：
It is connected with the first vacuum sample pipeline, the first vacuum sample pipeline is fixed on condenser for being located at
Fixing bracket.
With respect to the background art, the condenser vacuum provided by the present invention for large and medium-sized Steam Turbine measures dress
It puts, the throat including being used for from condenser tilts upward the first vacuum sample pipeline of extraction and for from the Base Heat of condenser
The hydrophobic pipeline that well is drawn upwards further includes the outlet phase respectively with the first vacuum sample pipeline and the hydrophobic pipeline
Even, for collect the water collect tank for the ponding discharged from the first vacuum sample pipeline and be connected at the top of the water collect tank the
Two vacuum sample pipelines.
Working medium in condenser is usually water vapour or water, when working medium is water vapour, becomes water after water vapour condensation, from
So, a certain amount of ponding can be formed in sampling line.Since the first vacuum sample pipeline is after condenser tilts stretching,
It is connected upwards with the water collect tank, and the second vacuum sample pipeline is connected with the top of the water collect tank, therefore by described
The entire sampling line that one vacuum sample pipeline and the second vacuum sample pipeline are formed does not include descending branch, therefore sampling line
In will not form the water column with certain altitude；In addition, due to being equipped with the water collect tank for collecting ponding in sampling line, make to take
Ponding in sample pipeline is less, can not form water column, natural that additonal pressure will not be generated in measurement process, so as to avoid
The measurement error as caused by water plug, measurement error is smaller, and measurement result is more accurate.
Therefore, a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine provided by the present invention, can be with
The accuracy that condenser vacuum measures is improved to a certain extent.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 provides the condenser vacuum measurement for large and medium-sized Steam Turbine for a kind of specific embodiment of the present invention
The structure schematic diagram of device；
Fig. 2 is the structure schematic diagram of water collect tank in Fig. 1.
Reference numeral is as follows：
First vacuum sample pipeline 1, hydrophobic pipeline 2,3 and second vacuum sample pipeline 4 of water collect tank；
Tilt vacuum sample pipeline 11, vertical vacuum sample pipeline 12, horizontal vacuum sampling line 13 and sampling valve 14.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
In order to which those skilled in the art is made to more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
It please refers to Fig.1 and Fig. 2, Fig. 1 is provided for a kind of specific embodiment of the present invention for large and medium-sized Steam Turbine
The structure schematic diagram of condenser vacuum measuring device；Fig. 2 is the structure schematic diagram of water collect tank in Fig. 1.
The embodiment of the invention discloses a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine, including
One vacuum sample pipeline 1, hydrophobic pipeline 2,3 and second vacuum sample pipeline 4 of water collect tank.Therefore, the sampling line master of the application
To include the first vacuum sample pipeline 1 and the second vacuum sample pipeline 4.
First vacuum sample pipeline 1 usually tilts upward extraction from the throat of condenser, main to include tilting vacuum sample
Pipeline 11, vertical vacuum sample pipeline 12, horizontal vacuum sampling line 13 and sampling valve 14.
It is in a certain angle with the central axis of condenser to tilt vacuum sample pipeline 11, in this specific embodiment, tilts
The central axis of vacuum sample pipeline 11 and condenser is in 45 °, in order to avoid have ponding in sampling line.In addition, due to condenser
Throat therefore in order to guarantee fully to sample, tilts vacuum sample pipeline 11 just at the saturated vapor area of unit steam discharge
End tilts stretching from condenser throat upwards.One end that inclination vacuum sample pipeline 11 puts in condenser is equipped with pressure head, should
Pressure head is covered using the stainless steel cage of fine mesh, enters in sampling line to reduce droplet in saturated vapor.
Vertical vacuum sample pipeline 12 is connected with tilting vacuum sample pipeline 11, and upwardly extends in the vertical direction certain
Length, it is notable that vertical vacuum sample pipeline 12 cannot extend downwardly.Horizontal vacuum sampling line 13 is connected to vertically
Between the top of vacuum sample pipeline 12 and water collect tank 3, and extend in the horizontal direction, specifically extend to the right, it is of course also possible to
Extend to negative direction.In view of practical application environment, the length of horizontal vacuum sampling line 13 is generally higher than vertical vacuum and takes
The length of sample pipeline 12.
Sampling valve 14 is set on horizontal vacuum sampling line 13, is mainly used for control and is flowed through horizontal vacuum sampling line 13
Sampling amount.In this specific embodiment, sampling valve 14 selects common needle valve, it is of course also possible to be other types of sampling valve,
It has no effect on and achieves the object of the present invention.
In this specific embodiment, vacuum sample pipeline 11, vertical vacuum sample pipeline 12 and horizontal vacuum sampling are tilted
Pipeline 13 is made of stainless-steel pipe, therefore three parts are by being welded together, since scene is to measurement accuracy requirement
Height, weldquality must be higher, in order to avoid leaking into air in pipeline, influences to measure.Certainly, three can also be by a stainless steel
Metallic rod is bent, and therefore, the material and connection mode of three is without being limited thereto, correspondingly, the knot of the first vacuum sample pipeline 1
Structure and material are also not necessarily limited to this.In addition, in this specific embodiment, the first vacuum sample pipeline 1 is identical including two
Probe tube, and the two is drawn from the throat of condenser.Certainly, the quantity of probe tube that the first vacuum sample pipeline 1 is included
It is also not necessarily limited to this.
It is connected in addition, the application is further included with the first vacuum sample pipeline 1, for fixing the first vacuum sample pipeline 1
Fixing bracket so that the first vacuum sample pipeline 1 is tightly held in the throat of condenser, ensures that measurement position is accurate, and keeps away
Exempt from pipeline vibrate in operation cause weld bond damage and leak.Usually, the first vacuum sample pipeline 1 is welded to fixing bracket
On, and fixing bracket is then welded on condenser, it is of course also possible to use other fixed forms substitute welding, however it is not limited to
This.
Hydrophobic pipeline 2 is usually drawn upwards from the bottom hot well of condenser, so that the ponding in sampling line is recycled
Into condenser.The main function of Condenser's Hot Well is to gather condensation water, ensures the operation of condensate pump.When in sampling line
Ponding it is more when, tension and the frictional force that is generated when sampling line flows due to water itself make condenser vacuum exist
Error during measurement is larger.Therefore, hydrophobic pipeline 2 can effectively prevent the seeping phenomenon in sampling line, and knot is measured to be promoted
The accuracy of fruit.Be additionally provided on hydrophobic pipeline 2 for control hydrophobic pipeline 2 ponding flow drain valve, the drain valve
For common needle valve, it is of course also possible to be the valve of other types.
Water collect tank 3 is connected respectively with the first vacuum sample pipeline 1 and hydrophobic pipeline 2, is mainly used for collecting and discharge from
The ponding discharged in one vacuum sample pipeline 1.Specifically, water collect tank 3 is cylindrical stainless steel metal tank, it is of course also possible to be
Other shapes or material, have no effect on and achieve the object of the present invention.
Second vacuum sample pipeline 4 is connected to the top of water collect tank 3, for will flow out from the first vacuum sample pipeline 1
Water vapor stream is exported after water collect tank 3 to vacuum experiment module or pressure transmitter.Second vacuum sample pipeline 4 also includes two
Stainless steel metal pipe certainly, can also be substituted by other materials.In this specific embodiment, the second vacuum sample pipeline 4 also includes
The horizontal segment being connected with vacuum test module and the vertical section being connected with water collect tank 3, it is notable that the second vacuum sampling tube
The horizontal segment on road 4 should avoid bending twice, and in actual installation, which can allow to tilt 10 ° upwards.
In this specific embodiment, water collect tank 3 be particularly located at the right side of the first vacuum sample pipeline 1, hydrophobic pipeline 2 top
Portion and the bottom of the second vacuum sample pipeline 4.Correspondingly, the side of water collect tank 3 open up there are two for connect the first vacuum take
The side mounting hole of sample pipeline 1, opens up that there are two for connecting the top surface of the second vacuum sample pipeline 4 peace on top center line
Fill hole, bottom opens up that there are one for connecting the bottom surface mounting hole of hydrophobic pipeline 2.Side mounting hole is aperture and the first vacuum
The consistent circular mounting hole of the outer diameter of sampling line 1, top mounting holes are that aperture is consistent with the outer diameter of the second vacuum sample pipeline 4
Circular mounting hole, base mounting hole is the aperture circular mounting hole consistent with the outer diameter of hydrophobic pipeline 2.The shape of each mounting hole
Circular, certainly, the pipeline that the shape of each mounting hole is coupled are related, of the invention and unlimited circle.
Each mounting hole takes by welding with the first vacuum sample pipeline 1,2 and second vacuum of hydrophobic pipeline respectively
Sample pipeline 4 links together, and corresponding sealing device can be set in each junction, with anti-leak.In addition, in the specific reality
It applies in example, two top surface mounting holes are located on the center line at 3 top of water collect tank, and a bottom surface mounting hole is located at 3 bottom of water collect tank
Center, and two side mounting holes are vertically in staggered distribution in the side of water collect tank 3, certainly, two side mounting holes,
The position of two top surface mounting holes and a bottom surface mounting hole is without being limited thereto.
In order to solve the problems, such as the ponding in sampling line, the pipeline diameter of the first vacuum sample pipeline 1 is more than hydrophobic pipeline 2
With the pipeline diameter of the second vacuum sample pipeline 4.In this specific embodiment, the pipeline diameter of the first vacuum sample pipeline 1 is
25mm, the pipeline diameter of 2 and second vacuum sample pipeline 4 of hydrophobic pipeline is 14mm.Certainly, the concrete numerical value of each pipeline diameter is simultaneously
It is without being limited thereto.
In conclusion the condenser vacuum measuring device provided by the present invention for large and medium-sized Steam Turbine, due to
There is no descending branch in the sampling line of first vacuum sample pipeline 1 and the second vacuum sample pipeline 4 composition, therefore ponding is not easy
Assemble in sampling line, being not easy form has the water column of certain altitude；In addition, again due to water collect tank 3 and hydrophobic pipeline 2 and sampling
Pipeline is connected, and water collect tank 3 and hydrophobic pipeline 2 is enable to discharge the ponding in sampling line in time, makes ponding in sampling line
It tails off, water column can not be formed, cause tripping grinder accident so as to solve Steam Turbine protection act to a certain extent.
Therefore, sampling line will not generate additonal pressure, and so as to reduce the measurement error of condenser vacuum, accuracy is just carried
It is high.
The foregoing description of the disclosed embodiments enables those skilled in the art to realize or use the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
The embodiments shown herein is formed on, and is to fit to consistent with the principles and novel features disclosed herein most wide
Range.
Claims (9)
1. a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine, which is characterized in that including：
For tilting upward the first vacuum sample pipeline of extraction from the throat of condenser；
For the hydrophobic pipeline drawn upwards from the bottom hot well of condenser；
It is connected respectively with the outlet of the first vacuum sample pipeline and the hydrophobic pipeline, for collecting from first vacuum
The water collect tank of the ponding of sampling line discharge；
The second vacuum sample pipeline being connected at the top of the water collect tank.
2. a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine according to claim 1, feature
It is, the first vacuum sample pipeline includes：
For tilting upward the inclination vacuum sample pipeline of extraction from the throat of condenser；
The vertical vacuum sample pipeline for being connected and upwardly extending in the vertical direction with the inclination vacuum sample pipeline；
It is connected to the level extended between the top of the vertical vacuum sample pipeline and the water collect tank and in the horizontal direction
Vacuum sample pipeline；
Sampling valve on the horizontal vacuum sampling line, for controlling the sampling amount of the horizontal vacuum sampling line.
3. a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine according to claim 2, feature
It is, the angular range tilted between vacuum sample pipeline and horizontal line is 30 °~45 °.
4. a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine according to claim 1, feature
It is, the water collect tank is cylinder.
5. a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine according to claim 4, feature
It is, the side of the water collect tank opens up that there are two for connecting the side mounting hole of the first vacuum sample pipeline.
6. a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine according to claim 4, feature
It is, opens up that there are two for connecting the top surface mounting hole of the second vacuum sample pipeline at the top of the water collect tank.
7. a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine according to claim 4, feature
It is, the bottom of the water collect tank opens up that there are one for connecting the bottom surface mounting hole of the hydrophobic pipeline.
8. a kind of condenser vacuum measuring device for large and medium-sized Steam Turbine according to claim 4, feature
It is, the pipeline diameter of the first vacuum sample pipeline is respectively greater than the hydrophobic pipeline and the second vacuum sample pipeline
Pipeline diameter.
9. dress is measured according to a kind of condenser vacuum for large and medium-sized Steam Turbine of claim 1 to 8 any one of them
It puts, which is characterized in that further include：
It is connected with the first vacuum sample pipeline, for being located at the fixation that the first vacuum sample pipeline is fixed on condenser
Stent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810067975.4A CN108195506A (en) | 2018-01-24 | 2018-01-24 | A kind of condenser vacuum measuring device for large and medium-sized Steam Turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810067975.4A CN108195506A (en) | 2018-01-24 | 2018-01-24 | A kind of condenser vacuum measuring device for large and medium-sized Steam Turbine |
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| CN108195506A true CN108195506A (en) | 2018-06-22 |
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| CN201810067975.4A Pending CN108195506A (en) | 2018-01-24 | 2018-01-24 | A kind of condenser vacuum measuring device for large and medium-sized Steam Turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411649A (en) * | 2019-07-25 | 2019-11-05 | 华能国际电力股份有限公司丹东电厂 | A kind of steam turbine condensing device vacuum measurement system and pressure taking method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411649A (en) * | 2019-07-25 | 2019-11-05 | 华能国际电力股份有限公司丹东电厂 | A kind of steam turbine condensing device vacuum measurement system and pressure taking method |
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