CN109696272A - A kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould - Google Patents
A kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould Download PDFInfo
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- CN109696272A CN109696272A CN201711071277.3A CN201711071277A CN109696272A CN 109696272 A CN109696272 A CN 109696272A CN 201711071277 A CN201711071277 A CN 201711071277A CN 109696272 A CN109696272 A CN 109696272A
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- cylinder mould
- head
- popped
- umbrella cover
- condenser vacuum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L21/00—Vacuum gauges
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present invention relates to a kind of condenser vacuum measurements of high measurement accuracy to be popped one's head in cylinder mould, including pressure bar (1) interconnected and cylinder mould (2), pressure bar (1) end is equipped with pressure port (11), the cylinder mould probe further includes umbellate form shield (3), the umbrella handle of the umbellate form shield (3) passes through cylinder mould (2) and is fixedly connected with pressure bar (1), umbrella cover is connected to umbrella handle top, reduces impact of the downward air-flow to pressure port (11).Compared with prior art, umbrella cover type structure of the present invention can play good rectified action to steam discharge air-flow, making the cylinder mould probe positioned at the rear part, institute's pressure power of popping one's head in this area is the static pressure of present position in axial flow velocity very little and undisturbed quiet region.Umbrella cover type structure has streamlined features simultaneously, can reduce the resistance that steam discharge air-flow flows through cylinder mould probe.
Description
Technical field
The present invention relates to a kind of condenser vacuum measurements to be popped one's head in cylinder mould, more particularly, to a kind of condensing of high measurement accuracy
Device vacuum measurement is popped one's head in cylinder mould.
Background technique
Condenser is very important equipment in pure condensate or extraction condensing type Turbo-generator Set, its working performance directly affects
To the safety of entire Steam Turbine, reliability and economy.The stabilization of condenser vacuum is maintained to pacify unit at runtime
Entirely, it steadily, economically runs significant.Simultaneously condenser vacuum be also determine unit operation efficiency key index it
One.Therefore, condenser vacuum measurement it is accurate with reliably be just particularly important, measurement be not allowed, gently then influence unit run
Economy, it is heavy then cause false protection or tripping, seriously threaten unit safety stable operation.
Condenser vacuum measurement generally uses pressure obtaning device pressure in condenser throat, reaches vacuum pressure by pressure tube
Power transmitter or vacuum pressure switch.As shown in Figure 1, 2, vacuum pressure sensor location is in unit steam discharge in the throat of condenser
Saturated vapor area, survey pressure ring border be different from general barometric surveying, measurement method has its particularity.It is more accurate at present to survey
Amount method is so that the average value of its measuring pressure is reacted solidifying in the same section of throat using several suction cylinder Probe arrangements
The average exhaust steam pressure of the plane in vapour device.Cylinder mould probe can reduce moisture in saturated vapor and enter vacuum measurement pipeline.
Turbine low pressure cylinder steam discharge still has certain kinetic energy, and air-flow velocity field itself is unevenly distributed, and exhaust passage molded line is not
Rule, these result in exhaust passage interior air-flow Flow Field Distribution disorder, are particularly susceptible and generate vortex, reflux etc. in condenser throat
Secondary flow phenomenon.Therefore it directly allows probe to bear washing away for uneven air-flow in throat's installing cylinder mould probe, vacuum spy can be reduced
The accuracy of head pressure.Simultaneously because low pressure (LP) cylinder steam discharge is saturated vapor, water is easily condensed into, probe is directly placed in steam
In, it is be easy to cause pressure pipeline ponding, influences measurement accuracy and even result in meter to can not work normally.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of high measurement accuracies
Condenser vacuum measurement is popped one's head in cylinder mould, and it is big to reduce suction cylinder probe pressure value distortion and deviation by preventing turbulent flow
Problem improves steam condenser of steam turbine set vacuum measurement precision.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould, including pressure bar interconnected and cylinder mould,
The pressure bar end is equipped with pressure port, and the cylinder mould probe further includes umbellate form shield, the umbellate form shield
Umbrella handle passes through cylinder mould and is fixedly connected with pressure bar, and umbrella cover is connected to umbrella handle top, is rushed with the air-flow for reducing downward to pressure port
It hits.
The umbrella handle is stainless steel tube.
The umbrella handle is hollow pipe.
The umbrella cover is welded or is threadedly coupled with umbrella handle.
The umbrella cover is hemisphere spherical shell shape.
The length of the umbrella handle exposing cylinder mould is 2/3 times to 1 times of umbrella cover interior diameter.
The interior diameter and cylinder mould of the umbrella cover are of same size.
The umbrella cover outer surface edge is equipped with diversion trench, and the condensing water droplet of umbrella cover outer surface is made to concentrate drippage.
Compared with prior art, the invention has the following advantages that
(1) umbrella cover type structure can play good rectified action to steam discharge air-flow, and the cylinder mould positioned at the rear part is made to pop one's head in
In axial flow velocity very little and undisturbed quiet region, institute's pressure power of popping one's head in this area is the quiet of present position
Pressure.Umbrella cover type structure has streamlined features simultaneously, can reduce the resistance that steam discharge air-flow flows through cylinder mould probe.
(2) low pressure (LP) cylinder steam discharge is in wet saturation state, and a large amount of small water droplets are had in air-flow, and saturated vapor is also easily solidifying to the cold
Knot.Umbrella cover plays collecting action to the moisture in air-flow, and small water droplet, condensed water in steam discharge air-flow is effectively prevented to enter pressure
Hole avoids pressure pipeline ponding from impacting measurement.
(3) shield avoids steam discharge air-flow from directly washing away to what cylinder mould was popped one's head in, mitigates the air-flow that cylinder mould and pressure pipe are born
Impact force extends the whole service life of measuring device.
(4) umbrella cover outer surface edge is equipped with diversion trench, so that the condensing water droplet of umbrella cover outer surface is concentrated drippage, further prevents
Water droplet enters pressure port.
Detailed description of the invention
Fig. 1 is that cylinder mould is popped one's head in turbine low pressure cylinder position schematic diagram；
Fig. 2 is the structural schematic diagram of existing cylinder mould probe；
Fig. 3 is the structural schematic diagram of the present embodiment cylinder mould probe；
Fig. 4 is air-flow schematic diagram near the present embodiment cylinder mould is popped one's head in.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
Embodiment
As shown in figure 3, a kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould, including pressure interconnected
Bar 1 and cylinder mould 2, cylinder mould 2 are wire mesh, and 1 end of pressure bar is equipped with pressure port 11, and cylinder mould probe further includes face pressure port side
To the umbellate form shield 3 of setting, the umbrella handle of umbellate form shield 3 passes through cylinder mould 2 and is fixedly connected with pressure bar 1.
Umbrella handle is stainless steel tube, vertical welding on pressure bar 1, considering weight factor, can be made into pipe it is hollow, and not
It influences that tubule can be selected as far as possible under the premise of structural strength, 12mm is not to be exceeded in caliber maximum.It welding position should be in each row's pressure
Between hole, pressure port 11 is not blocked.
Umbrella cover is made with stainless steel material, is hemisphere spherical shell shape, and the cylinder mould that spherical shell interior diameter should be equal to cylinder mould probe is wide
Degree should remain of same size with cylinder mould such as irregular size for 114.3mm under ASME standard.Shell thickness can be
It does not influence to be thinned as far as possible in the case where structural strength.Umbrella cover using welding or is threadedly coupled with umbrella handle, and link position is in umbrella cover
At the heart.
The pipe range that umbrella handle exposes cylinder mould 2 should be 2/3 times to 1 times of umbrella cover interior diameter, i.e., umbrella cover bottom and 2 top of cylinder mould it
Between vertical interval be 1/6 to 1/2 times of umbrella cover interior diameter.
To make the condensing water droplet of umbrella cover outer surface concentrate drippage, umbrella cover outer surface edge is equipped with diversion trench.
In use, shield 3 can be made to reduce downward air-flow to pressure port 11 in proper orientation cylinder mould probe placement
Impact.As Fig. 4 be using shield after, high velocity vapor stream straight down encounters the blocking of spherical shell shape umbrella cover, and formation streams, gas
Body shunts at the top of umbrella cover, streams along umbrella cover surface to two sides, and flow boundary layer is detached from umbrella along surface progressive additive, final gas
Cover flowing.Umbrella cover successfully hinders disturbance of the gas to lower part pressure region.
Claims (8)
1. a kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould, including pressure bar interconnected (1) and cylinder mould
(2), pressure bar (1) end is equipped with pressure port (11), which is characterized in that the cylinder mould probe further includes umbellate form protection
It covers (3), the umbrella handle of the umbellate form shield (3) passes through cylinder mould (2) and is fixedly connected with pressure bar (1), and umbrella cover is connected to umbrella handle
Top, to reduce impact of the downward air-flow to pressure port (11).
2. a kind of condenser vacuum measurement of high measurement accuracy according to claim 1 is popped one's head in cylinder mould, which is characterized in that
The umbrella handle is stainless steel tube.
3. a kind of condenser vacuum measurement of high measurement accuracy according to claim 1 is popped one's head in cylinder mould, which is characterized in that
The umbrella handle is hollow pipe.
4. a kind of condenser vacuum measurement of high measurement accuracy according to claim 1 is popped one's head in cylinder mould, which is characterized in that
The umbrella cover is welded or is threadedly coupled with umbrella handle.
5. a kind of condenser vacuum measurement of high measurement accuracy according to claim 1 is popped one's head in cylinder mould, which is characterized in that
The umbrella cover is hemisphere spherical shell shape.
6. a kind of condenser vacuum measurement of high measurement accuracy according to claim 1 is popped one's head in cylinder mould, which is characterized in that
The length of umbrella handle exposing cylinder mould (2) is 2/3 times to 1 times of umbrella cover interior diameter.
7. a kind of condenser vacuum measurement of high measurement accuracy according to claim 1 is popped one's head in cylinder mould, which is characterized in that
The interior diameter and cylinder mould of the umbrella cover are of same size.
8. a kind of condenser vacuum measurement of high measurement accuracy according to claim 1 is popped one's head in cylinder mould, which is characterized in that
The umbrella cover outer surface edge is equipped with diversion trench, and the condensing water droplet of umbrella cover outer surface is made to concentrate drippage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071277.3A CN109696272A (en) | 2017-11-03 | 2017-11-03 | A kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071277.3A CN109696272A (en) | 2017-11-03 | 2017-11-03 | A kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109696272A true CN109696272A (en) | 2019-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711071277.3A Pending CN109696272A (en) | 2017-11-03 | 2017-11-03 | A kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould |
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| Country | Link |
|---|---|
| CN (1) | CN109696272A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065140A (en) * | 1991-03-18 | 1992-10-07 | 南京航空学院 | Pressure-measuring probe |
| CN203837973U (en) * | 2014-04-03 | 2014-09-17 | 上海理工大学 | Static pressure sampling device of moist air |
| CN204008619U (en) * | 2014-08-25 | 2014-12-10 | 北京网智运通科技有限公司 | A kind of replaceable sensor formula vehicle-mounted gas detection probe |
| CN207395953U (en) * | 2017-11-03 | 2018-05-22 | 中电华创电力技术研究有限公司 | A kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould |
-
2017
- 2017-11-03 CN CN201711071277.3A patent/CN109696272A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065140A (en) * | 1991-03-18 | 1992-10-07 | 南京航空学院 | Pressure-measuring probe |
| CN203837973U (en) * | 2014-04-03 | 2014-09-17 | 上海理工大学 | Static pressure sampling device of moist air |
| CN204008619U (en) * | 2014-08-25 | 2014-12-10 | 北京网智运通科技有限公司 | A kind of replaceable sensor formula vehicle-mounted gas detection probe |
| CN207395953U (en) * | 2017-11-03 | 2018-05-22 | 中电华创电力技术研究有限公司 | A kind of condenser vacuum measurement of high measurement accuracy is popped one's head in cylinder mould |
Non-Patent Citations (1)
| Title |
|---|
| 石侃;: "浅议凝汽器真空度变化及真空测量技术", 通讯世界, no. 24, pages 254 - 255 * |
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