CN208996774U - 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
- CN208996774U CN208996774U CN201821742879.7U CN201821742879U CN208996774U CN 208996774 U CN208996774 U CN 208996774U CN 201821742879 U CN201821742879 U CN 201821742879U CN 208996774 U CN208996774 U CN 208996774U
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- Prior art keywords
- universal joint
- lvdt
- bracket
- connect
- feed pump
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- Withdrawn - After Issue
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 125000003003 spiro group Chemical group 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 241000489425 Ephedra fragilis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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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.The utility model 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 spiro rod length 1/3-1/4 on universal joint, the steam feed pump LVDT that travel switch transmits a signal to operator station DCS system falls off sound-light alarm logic unit.The utility model is applied to the warning device that universal joint falls off.
Description
Technical field:
The utility model 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
The valve actuator of feed pump MDEH control system is the closed-loop control device of valve location servo valve control circuit composition, with
The position signal of valve is converted into electric signal with valve mobile valve displacement sensor (LVDT), is returned as SERVO CONTROL
The negative-feedback on road.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 in valve servo control loop, the signal can
The reliability of closed-loop control device is directly related to by property.To guarantee that the reliability of displacement signal measurement generally uses two LVDT
Redundant 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
Feedback device follows valve to act together to play the role of measurement when movement, while also ensuring LVDT feedback rod and adjusting valve lever flat
The levelness of row degree and 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.
Utility model content:
In order to overcome the above problem of the existing technology, the purpose of the utility model is to provide one kind prevent steam turbine to
The warning device that water pump LVDT 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 includes: steam turbine feed pump
Tune valve lever, the tune valve lever connect with bracket, and the bracket is connect with universal joint by screw rod, and described is universal
Section is connect with LVDT displacement sensor, and the bracket is connect with fixed bracket is switched, the support bracket fastened one end of the switch
Travel switch is installed, the travel switch is on the straight line where the screw rod, and the operating distance of travel switch
Be 1/3-1/4 of spiro rod length on universal joint, the travel switch transmit a signal to the steam-operating of operator station DCS system to
Water pump LVDT falls off sound-light alarm logic unit.
The utility model has the beneficial effects that
The utility model can find the loosening feelings of universal joint in LVDT feedback device in time in steam feed pump operation
Condition simultaneously issues sound and light signal prompting operations staff note that connection service personnel processing rapidly, avoids generation steam feed pump from tripping
Or even whole compressor emergency shutdown accident.
The utility model be suitable for when production scene unit is run due to adjust valve and LVDT expansion are uneven, adjust Valve Vibration and
LVDT feedback rod 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 anti-interference energy
The features such as power is strong, and measurement is accurate, and equipment maintenance cost is low.
The utility model installs a travel switch outside universal joint, and travel switch action signal is sent to operator station
Sound and light alarm signal is triggered in DCS system steam feed pump LVDT dropping-alarming logic, and operations staff is reminded to pay attention to simultaneously joining in time
It is that service personnel checks processing steam feed pump LVDT universal joint looseness fault.
The utility model can be widely applied to the other industries such as electric power, chemical industry.
The utility model includes receiving LVDT universal joint to loosen the travel switch of signal, the fixation bracket of travel switch, behaviour
The work person steam feed pump LVDT in DCS system that stands falls off sound-light alarm logic.It will receive the stroke of LVDT universal joint loosening signal
Switch is fixed on bracket, and high-intensitive fixation bracket is mounted on steam feed pump tune valve lever bracket with screw, and stroke is opened
The operating distance of pass 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 steam feed pump LVDT processed falls off in sound-light alarm logic, due to adjusting Valve Vibration and LVDT feedback rod to fix when unit is run
Just etc. reasons do not cause universal joint connect travel switch movement after the operating distance for loosening to adjustment with the bracket on valve lever is adjusted
Alarm signal is issued, operations staff is reminded to notice that simultaneously contacting service personnel in time checks processing steam feed pump LVDT universal joint pine
Dynamic failure.
Detailed description of the invention:
Attached drawing 1 is the structural schematic diagram of the utility model.In figure, 1 is adjusts valve lever, and 2 be bracket, and 3 be universal joint, and 4 are
Fixed bracket is switched, 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 includes: steam turbine feed pump
Tune valve lever, the tune valve lever connect with bracket, and the bracket is connect with universal joint by screw rod, and described is universal
Section is connect with LVDT displacement sensor, and the bracket is connect with fixed bracket is switched, the support bracket fastened one end of the switch
Travel switch is installed, the travel switch is on the straight line where the screw rod, and the operating distance of travel switch
Be 1/3-1/4 of spiro rod length on universal joint, the travel switch transmit a signal to the steam-operating of operator station DCS system to
Water pump LVDT falls off sound-light alarm logic unit.Bracket on steam feed pump steam turbine tune valve lever is connect with LVDT feedback rod
Part adds universal joint excessively to connect using transverse link, and feedback device follows valve to act together and plays measurement and make when valve event
With, while also ensuring LVDT feedback rod and adjusting 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, 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.
Claims (1)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821742879.7U CN208996774U (en) | 2018-10-26 | 2018-10-26 | The warning device for preventing steam turbine feed pump LVDT universal joint from falling off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821742879.7U CN208996774U (en) | 2018-10-26 | 2018-10-26 | The warning device for preventing steam turbine feed pump LVDT universal joint from falling off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208996774U true CN208996774U (en) | 2019-06-18 |
Family
ID=66804733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821742879.7U Withdrawn - After Issue CN208996774U (en) | 2018-10-26 | 2018-10-26 | The warning device for preventing steam turbine feed pump LVDT universal joint from falling off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208996774U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139135A (en) * | 2018-10-26 | 2019-01-04 | 大唐黑龙江发电有限公司哈尔滨第热电厂 | The warning device for preventing steam turbine feed pump LVDT universal joint from falling off |
-
2018
- 2018-10-26 CN CN201821742879.7U patent/CN208996774U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139135A (en) * | 2018-10-26 | 2019-01-04 | 大唐黑龙江发电有限公司哈尔滨第热电厂 | The warning device for preventing steam turbine feed pump LVDT universal joint from falling off |
| CN109139135B (en) * | 2018-10-26 | 2024-03-29 | 大唐黑龙江发电有限公司哈尔滨第一热电厂 | Alarm device for preventing water supply pump LVDT universal joint of steam turbine from falling off |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190618 Effective date of abandoning: 20240329 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190618 Effective date of abandoning: 20240329 |