CN109139135A - The warning device for preventing steam turbine feed pump LVDT universal joint from falling off - Google Patents
The warning device for preventing steam turbine feed pump LVDT universal joint from falling off Download PDFInfo
- Publication number
- CN109139135A CN109139135A CN201811255402.0A CN201811255402A CN109139135A CN 109139135 A CN109139135 A CN 109139135A CN 201811255402 A CN201811255402 A CN 201811255402A CN 109139135 A CN109139135 A CN 109139135A
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- China
- Prior art keywords
- universal joint
- lvdt
- bracket
- feed pump
- connect
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 125000003003 spiro group Chemical group 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The warning device for preventing steam turbine feed pump LVDT universal joint from falling off.When unit is run due to adjust valve and LVDT expansion are uneven, adjust Valve Vibration and LVDT feedback rod it is fixed not just etc. a variety of causes can all cause universal joint with adjust the bracket on valve lever to connect loosening universal joint gradually to exit outward.Present invention composition includes the tune valve lever (1) of steam turbine feed pump, valve lever is adjusted to connect with bracket (2), bracket is connect with universal joint (3) by screw rod, universal joint is connect with LVDT displacement sensor (7), bracket is connect with fixed bracket (4) are switched, it switchs support bracket fastened one end and travel switch (5) is installed, travel switch is on the straight line where screw rod, and the operating distance of travel switch is 1/3-1/4 of spiro rod length on universal joint, and the steam feed pump LVDT that travel switch transmits a signal to operator station DCS system falls off sound-light alarm logic unit.The present invention is applied to the warning device that universal joint falls off.
Description
Technical field:
The present invention relates to a kind of warning devices for preventing steam turbine feed pump LVDT universal joint from falling off.
Background technique:
It is 2 × 300MW that the first steam power plant of Datang Harbin, which shows installed capacity, and every machine assembles 2 steam feed pumps, steam-operating water supply
The valve actuator of pump MDEH control system is the closed-loop control device of valve location servo valve control circuit composition, follows valve
The position signal of valve is converted into electric signal by the mobile valve displacement sensor (LVDT) of door, as servo control loop
Negative-feedback.When the valve location command signal of computer output is equal with valve position feedback signal, valve is controlled in a certain
Position.Valve position feedback signal is a very important signal, the reliability of the signal in valve servo control loop
It is directly related to the reliability of closed-loop control device.To guarantee that the reliability of displacement signal measurement generally uses two LVDT redundancies
Measurement adjusts the bracket on valve lever to add universal joint excessively to connect using transverse link with LVDT feedback joint element for bar, valve event
When feedback device follow valve to act together to play the role of measurement, while also ensuring LVDT feedback rod and adjusting the valve lever depth of parallelism
And the levelness of LVDT feedback rod transverse link.
But this measurement method, which has the disadvantage in that steam turbine LVDT feedback linkage is mounted directly, is fixed on feedback bracket
On, so that the iron core for connecting LVDT and coil inner wall is generated radial friction due to vibration etc., iron core or coil are ground away, led
Cause Fluctuation of Medium-pressure Adjustment Valve.Steam feed pump steam turbine tune valve LVDT universal joint is to be threadedly coupled with the bracket on tune valve lever, unit fortune
When row due to adjust valve and LVDT expansion are uneven, adjust Valve Vibration and LVDT feedback rod it is fixed not just etc. a variety of causes can all cause it is universal
Section with adjust valve lever on bracket connect loosening universal joint gradually exit outward, ultimately cause tune valve feedback device fall off steam-operating to
Pump rotary speed decline is shut down or unit hypervelocity stopping accident.
Summary of the invention:
In order to overcome the above problem of the existing technology, the object of the present invention is to provide one kind to prevent steam turbine feed pump LVDT
The warning device that universal joint falls off.
Above-mentioned purpose is realized by following technical scheme:
A kind of warning device for preventing steam turbine feed pump LVDT universal joint from falling off, composition include: the tune of steam turbine feed pump
Valve lever, the tune valve lever are connect with bracket, and the bracket is connect with universal joint by screw rod, the universal joint with
The connection of LVDT displacement sensor, the bracket are connect with fixed bracket is switched, the support bracket fastened one end installation of the switch
There is travel switch, the travel switch is on the straight line where the screw rod, and the operating distance of travel switch is ten thousand
To saving 1/3-the 1/4 of upper spiro rod length, the travel switch transmits a signal to the steam feed pump of operator station DCS system
LVDT falls off sound-light alarm logic unit.
The alarm method of the above-mentioned warning device for preventing steam turbine feed pump LVDT universal joint from falling off, production scene unit fortune
When row, adjust valve and LVDT expansion are uneven, adjust Valve Vibration and LVDT feedback rod it is fixed it is not positive due to, cause to adjust valve feedback branch
Frame or universal joint connects loosenings with the bracket on valve lever is adjusted, and universal joint gradually exits outward, when universal joint on tune valve lever
Bracket connection loosen universal joint when gradually exiting outward the movement of triggering travel switch, signal be sent to operator station DCS system
Sound and light alarm signal is triggered in steam feed pump LVDT dropping-alarming logic, and operations staff is reminded to pay attention to simultaneously contacting maintenance people in time
Member checks processing steam feed pump LVDT universal joint looseness fault.
Beneficial effects of the present invention:
The present invention can have found the loosening situation of universal joint in LVDT feedback device in steam feed pump operation in time and issue
Sound and light signal reminds operations staff note that connection service personnel processing rapidly, avoids that steam feed pump tripping or even whole occurs
Compressor emergency shutdown accident.
The present invention is suitable for when production scene unit is run due to adjusting valve and LVDT expansion unevenness, adjusting Valve Vibration and LVDT anti-
Feedback bar is fixed just not to wait a variety of causes to lead to the early warning before adjusting valve feedback bracket or universal joint to fall off, and has strong antijamming capability,
The features such as measurement is accurate, and equipment maintenance cost is low.
The present invention installs a travel switch outside universal joint, and travel switch action signal is sent to operator station DCS
Sound and light alarm signal is triggered in system steam feed pump LVDT dropping-alarming logic, and operations staff is reminded to pay attention to simultaneously contacting inspection in time
Repair personnel inspection processing steam feed pump LVDT universal joint looseness fault.
It the composite can be widely applied to the other industries such as electric power, chemical industry.
The present invention includes travel switch, the fixation bracket of travel switch, operator for receiving LVDT universal joint and loosening signal
Steam feed pump LVDT falls off sound-light alarm logic in DCS system of standing.It will receive the travel switch of LVDT universal joint loosening signal
It is fixed on bracket, high-intensitive fixation bracket is mounted on steam feed pump tune valve lever bracket with screw, travel switch
Operating distance can be adjusted to 1/3-1/4 of spiro rod length on universal joint, and travel switch signal is sent to steam feed pump control system
System steam feed pump LVDT falls off in sound-light alarm logic, due to adjusting Valve Vibration and LVDT feedback rod to fix not just when unit is run
Etc. reasons cause universal joint connect travel switch movement sending after the operating distance for loosening to adjustment with the bracket on valve lever is adjusted
Alarm signal reminds operations staff to notice that simultaneously contacting service personnel in time checks that processing steam feed pump LVDT universal joint loosens event
Barrier.
Detailed description of the invention:
Accompanying drawing 1 is the structural representation of the present invention.In figure, 1 is adjusts valve lever, and 2 be bracket, and 3 be universal joint, and 4 fix for switch
Bracket, 5 be travel switch, and 6 be transverse link, and 7 be LVDT displacement sensor.
Specific embodiment:
Embodiment 1:
A kind of warning device for preventing steam turbine feed pump LVDT universal joint from falling off, composition include: the tune of steam turbine feed pump
Valve lever, the tune valve lever are connect with bracket, and the bracket is connect with universal joint by screw rod, the universal joint with
The connection of LVDT displacement sensor, the bracket are connect with fixed bracket is switched, the support bracket fastened one end installation of the switch
There is travel switch, the travel switch is on the straight line where the screw rod, and the operating distance of travel switch is ten thousand
To saving 1/3-the 1/4 of upper spiro rod length, the travel switch transmits a signal to the steam feed pump of operator station DCS system
LVDT falls off sound-light alarm logic unit.Bracket on steam feed pump steam turbine tune valve lever makes with LVDT feedback joint element for bar
It is excessively connected with transverse link plus universal joint, feedback device follows valve to act together to play the role of measurement when valve event, together
When also ensure LVDT feedback rod and adjust the levelness of the valve lever depth of parallelism and LVDT feedback rod transverse link.
Embodiment 2:
The alarm method of the above-mentioned warning device for preventing steam turbine feed pump LVDT universal joint from falling off, the operation of production scene unit
When, adjust valve and LVDT expansion are uneven, adjust Valve Vibration and LVDT feedback rod it is fixed it is not positive due to, cause to adjust valve feedback bracket
Or universal joint connect loosening with the bracket on valve lever is adjusted, universal joint gradually exits outward, when universal joint and adjusts on valve lever
Bracket connection loosens the movement of triggering travel switch, signal when universal joint gradually exits outward and is sent to operator station DCS system vapour
Sound and light alarm signal is triggered in dynamic feed pump LVDT dropping-alarming logic, operations staff is reminded to pay attention to simultaneously contacting service personnel in time
Check processing steam feed pump LVDT universal joint looseness fault.
Claims (2)
1. a kind of warning device for preventing steam turbine feed pump LVDT universal joint from falling off, composition includes: steam turbine feed pump
Valve lever is adjusted, it is characterized in that；The tune valve lever is connect with bracket, and the bracket is connect with universal joint by screw rod, institute
The universal joint stated is connect with LVDT displacement sensor, and the bracket is connect with fixed bracket is switched, the fixed branch of the switch
One end of frame is equipped with travel switch, and the travel switch is on the straight line where the screw rod, and travel switch
Operating distance is 1/3-1/4 of spiro rod length on universal joint, and the travel switch transmits a signal to operator station DCS system
Steam feed pump LVDT fall off sound-light alarm logic unit.
2. a kind of alarm method of the warning device described in claim 1 for preventing steam turbine feed pump LVDT universal joint from falling off,
It is characterized in that: due to adjusting, valve and LVDT expansion are uneven, adjust Valve Vibration and LVDT feedback rod fixed not when production scene unit is run
Positive reason causes that valve feedback bracket or universal joint is adjusted to connect loosening with the bracket on valve lever is adjusted, and universal joint gradually moves back outward
Out, when universal joint connect triggering travel switch movement, letter when loosening universal joint gradually exits outward with the bracket on valve lever is adjusted
It number is sent in operator station DCS system steam feed pump LVDT dropping-alarming logic and to trigger sound and light alarm signal, remind operation
Personnel notice that simultaneously contacting service personnel in time checks processing steam feed pump LVDT universal joint looseness fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811255402.0A CN109139135B (en) | 2018-10-26 | 2018-10-26 | Alarm device for preventing water supply pump LVDT universal joint of steam turbine from falling off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811255402.0A CN109139135B (en) | 2018-10-26 | 2018-10-26 | Alarm device for preventing water supply pump LVDT universal joint of steam turbine from falling off |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109139135A true CN109139135A (en) | 2019-01-04 |
| CN109139135B CN109139135B (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811255402.0A Active CN109139135B (en) | 2018-10-26 | 2018-10-26 | Alarm device for preventing water supply pump LVDT universal joint of steam turbine from falling off |
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| Country | Link |
|---|---|
| CN (1) | CN109139135B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822579A (en) * | 2020-08-11 | 2020-10-27 | 沃得精机(中国)有限公司 | Reversible stretching pad structure for press machine |
| CN112377274A (en) * | 2020-10-22 | 2021-02-19 | 呼和浩特科林热电有限责任公司 | LVDT prevents fracture device and steam turbine |
| CN113531513A (en) * | 2021-07-28 | 2021-10-22 | 哈尔滨沃华智能发电设备有限公司 | Protection method of steam drum water level control system during steam inlet regulating valve failure of steam-driven water supply pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205779040U (en) * | 2016-05-27 | 2016-12-07 | 河南华润电力古城有限公司 | A kind of feed pump turbine and LVDT thereof |
| CN106705822A (en) * | 2016-11-29 | 2017-05-24 | 中国神华能源股份有限公司 | Turbine valve stroke measuring device, turbine valve stroke monitoring system and turbine valve stroke monitoring method |
| CN206972317U (en) * | 2017-06-27 | 2018-02-06 | 河南华润电力首阳山有限公司 | A kind of feedback device suitable for feed pump turbine |
| CN208996774U (en) * | 2018-10-26 | 2019-06-18 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | The warning device for preventing steam turbine feed pump LVDT universal joint from falling off |
-
2018
- 2018-10-26 CN CN201811255402.0A patent/CN109139135B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205779040U (en) * | 2016-05-27 | 2016-12-07 | 河南华润电力古城有限公司 | A kind of feed pump turbine and LVDT thereof |
| CN106705822A (en) * | 2016-11-29 | 2017-05-24 | 中国神华能源股份有限公司 | Turbine valve stroke measuring device, turbine valve stroke monitoring system and turbine valve stroke monitoring method |
| CN206972317U (en) * | 2017-06-27 | 2018-02-06 | 河南华润电力首阳山有限公司 | A kind of feedback device suitable for feed pump turbine |
| CN208996774U (en) * | 2018-10-26 | 2019-06-18 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | The warning device for preventing steam turbine feed pump LVDT universal joint from falling off |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822579A (en) * | 2020-08-11 | 2020-10-27 | 沃得精机(中国)有限公司 | Reversible stretching pad structure for press machine |
| CN112377274A (en) * | 2020-10-22 | 2021-02-19 | 呼和浩特科林热电有限责任公司 | LVDT prevents fracture device and steam turbine |
| CN112377274B (en) * | 2020-10-22 | 2023-03-21 | 呼和浩特科林热电有限责任公司 | LVDT prevents fracture device and steam turbine |
| CN113531513A (en) * | 2021-07-28 | 2021-10-22 | 哈尔滨沃华智能发电设备有限公司 | Protection method of steam drum water level control system during steam inlet regulating valve failure of steam-driven water supply pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109139135B (en) | 2024-03-29 |
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