CN2147355Y - Water checking device for steam turbine - Google Patents
Water checking device for steam turbine Download PDFInfo
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- CN2147355Y CN2147355Y CN 93205357 CN93205357U CN2147355Y CN 2147355 Y CN2147355 Y CN 2147355Y CN 93205357 CN93205357 CN 93205357 CN 93205357 U CN93205357 U CN 93205357U CN 2147355 Y CN2147355 Y CN 2147355Y
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- water level
- steam turbine
- water
- temperature
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Abstract
The utility model relates to a water checking device for a steam turbine, which is composed of a microcomputer, an interface circuit, an alarm output circuit, a temperature and water level parameter display. The interface circuit is composed of a thermocouple switching amplifying circuit with cold junction compensation, and a water level measuring signal switching amplifying circuit. The alarm output circuit is composed of an acoustooptic alarm output driving circuit and a driving executive circuit. The utility model has the advantages that the pipes which are connected with the steam turbine body and the temperature and the water level which are related to the turbine body can be effectively monitored, when the parameter is over the limit, the utility model can automatically emit an acoustooptic alarm and remind the operating staff. When water comes into the steam turbine, related valves can be automatically opened and closed to prevent water from coming into the steam turbine. The utility model is an ideal water checking device for a steam turbine.
Description
The utility model relates to a kind of turbine water induction detection device, belongs to the automatic detection and the control gear of steam turbine.
Its harm of turbine water induction is very serious, and the lighter influences the turbine rotor life-span, causes cylinder deformation, and junction plane leaks vapour, weight person's packing, the heavy wear of sound part, permanent bending of rotor.At present, Xingtai power plant has designed easy steam turbine water inlet detection device, and it is made up of thermocouple, diverter switch and index gauge.Its major defect is to reflect steam turbine water inlet information on the whole, and function singleness does not have corresponding warning function, can not reflect the height of water level.
The purpose of this utility model provides a kind of temperature (temperature difference) that can show relevant turbine body and corresponding pipeline, the monitor temperature variance ratio, the water level situation that shows relevant tank body and pipeline, when having related parameter out-of-limit, send acoustooptic alarm, and can when intaking, steam turbine closing valve be arranged switch, in time cut off feed source or open hydrophobic door, prevent the detection device of turbine water induction accident.
The purpose of this utility model is to realize like this, it is by microcomputer, interface circuit, warning output circuit and temperature and water level parameter display device are formed, interface circuit comprises thermocouple converter amplifier circuit and the level measuring signal conversion amplification circuit of being with cold junction compensation, the warning output circuit comprises the acoustooptic alarm output driving circuit and drives executive circuit, microcomputer is by 8031 single-chip microcomputers, data, program storage, A/D, decoder, latch, keyboard display unit, printer is formed, the output of interface circuit is through the I/O of A/D to 8031 mouth, to temperature and water level parameter display device, the warning output circuit is connected to the P1.0-P1.3 of 8031 I/O passage through 8255 interface chips in 8031 output.
Working principle of the present utility model is as follows:
This device adopts 8031 single-chip microcomputers to finish functions such as the self check of whole device, sampling, computing, judgement.Thermocouple Temperature Signal and water level signal are directly gone into A/D converter after amplifying through conversion, and the signal after the conversion enters 8031 single-chip microcomputers, and single-chip microcomputer carries out filtering, gamma correction, judgement to the signal of gathering.By I/O interface chip 8255, single-chip microcomputer shows water level and the temperature signal of gathering.When a certain road parameter is crossed the definite value I, make the actuating of relay by the photoelectricity coupling, send the acoustooptic alarm signal.When parameter was crossed the definite value II, the actuating of relay drove relevant actuating equipment.Thereby play the purpose that prevents turbine water induction.
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is the thermocouple converter amplifier circuit of band cold junction compensation.
Fig. 3 is the converter amplifier circuit of water level input signal.
Fig. 4 a, 4b are steam turbine water inlet detection device warning output principle figure.
Fig. 5 realizes block diagram for water inlet detection device software.
Fig. 6 is a turbine water induction detection device measuring point schematic representation.
As shown in Figure 1, the utility model is by microcomputer, interface circuit, warning output circuit and temperature and water level parameter display device are formed, interface circuit comprises thermocouple converter amplifier circuit and the level measuring signal conversion amplification circuit of being with cold junction compensation, the warning output circuit comprises the acoustooptic alarm output driving circuit and drives executive circuit, microcomputer is by 8031 single-chip microcomputers, data, program storage, A/D, decoder, latch, keyboard display unit, printer is formed, the output of interface circuit is through the I/O of A/D to 8031 mouth, to temperature and water level parameter display device, the warning output circuit is connected to the P1.0-P1.3 of 8031 I/O passage through 8255 interface chips in 8031 output.
By Fig. 2-4 as can be known, the thermocouple converter amplifier circuit of band cold junction compensation is by operational amplifier, voltage to frequency converter, optoelectronic isolator is formed, operational amplifier is by G1, D1, R1, R2, R3 and zeroing circuit are formed, R1-R3 forms bleeder circuit, D1 is used for cold junction compensation, the two ends of thermocouple are connected to G1's respectively+1N and device ground, zeroing circuit is by G2, R4, R5, W2 forms, and W2 is used for the zeroing position, and the output of G2 is connected to 10 pin of G1, voltage to frequency converter is by VFG, W1 forms, and W1 is used for the regulated signal amplitude, and optoelectronic isolator is by TLP, R6, R7, R8 forms.
Level measuring signal conversion amplification circuit is made up of amplifier and optoelectronic isolator, amplifier is a two-stage, the first order is made up of G3 and outward element R1-R8, W1, and the second level is made up of G4 and outward element R9-R11, W2, and optoelectronic isolator is made up of TLP and outward element R12-R15, C1.
The acoustooptic alarm output driving circuit is made up of optoelectronic isolator TIL and outward element R1, R2, J1, D2, D3, driving executive circuit is made up of optoelectronic isolator TIL and outward element R3, R4, D4, D5, J1 controls each road water inlet and water level acoustooptic alarm by its contact, and J2 drives the actuating equipment recloser by its contact closing valve.
Water level shows that the employing light beam shows.
ADC08098 road analog multiplexer is adopted in whole device A/D conversion, and which signal enters 8031 single-chip microcomputers actually, is chosen by address decoder.In 4 two-way I/O mouths of 8031, P0.0-P0.7 is as 8 bit data mouths, also shows as the inlet opening of sampled data and signal and output data and light simultaneously.Simultaneously also as the least-significant byte address wire, P2.0-P2.3 is high 4 bit address lines to P0.0-P0.7 by latch, and the program storage signal is by the PSEN signal gating, and data storage is by the ale signal gating.EPROM adopts 27128 chips, amount of memory 16K; RAM adopts 6264, the 8k capacity, and A/D converter adopts ADC0809.Input/output interface all adopt 8255 chips be standard with single-chip processor i/o expansion interface element.The utility model is equipped with 8279 to give and put keyboard.Can give and earlier input channel being demarcated, determine which is the level measuring signal, and which is a temperature measurement signal, for the level measuring signal, also available 8279 are defined as two kinds of 0-10mA or 4-20mA.Parameter is reported to the police and adjusting of action definite value also set by 8279.The utility model has related parameter to show to export 8255 interface chips to by 8031 mouthfuls of P0.0-P0.7 to be finished.Customer requirements is looked in concrete configuration, passage what and different.This device configuration TP-uP-16A printer, time printing has related parameter.
This device has following function:
One, but steam turbine water inlet detection device showing temperature, the temperature difference, water level, rate of temperature change etc. have related parameter.
Two, temperature point is 20, adopts the thermocouple input.Each measuring point all disposes two thermocouples, and numerical value is imported as single-point after getting average.This passage output of automatic blocking when finding a certain channel failure, each measuring point temperature value all can show separately.
Three, the demonstration of temperature difference measuring point can be carried out with temperature demonstration switching.
Four, water level adopts advanced person's light beam to show, understands intuitively, and is equipped with the corresponding digital demonstration.0-10mA or 4-20mA current signal are adopted in input.
Five, device is equipped with the output of secondary relay, and promptly each passage (temperature, water level etc.) is equipped with two relays, and one-level is used for acoustooptic alarm, secondary is used to drive actuating equipment.
Six, configuration is external or give and put keyboard.Plug during use, but dispense temperature and water level circulation passage and carry out scale conversion, and definite value can be set.Can dial down after finishing using.
Seven, device is provided with POST, calling self check, three kinds of self test modes of timer-controlled self-inspection.
Eight, the measuring point of water inlet detection device is as shown in the table.
| Temperature point | Temperature difference measuring point | The water level measuring point |
| Main steam temperature regulate warm steam temperature high pressure cylinder steam discharge intermediate pressure cylinder steam discharge again on cold section steam temperature high pressure cylinder of the hot vapour outer shell under the wall temperature high pressure cylinder outer shell under the wall temperature intermediate pressure cylinder outer shell under the wall temperature intermediate pressure cylinder outer shell wall temperature 1-8 section draw gas | The upper and lower extraction line of the upper and lower intermediate pressure cylinder outer shell of the upper and lower high-pressure cylinder outer shell of governing stage steam temperature is upper and lower | Coagulate cold carbonated drink position deaerator level STEAM TRAP water level height and add (#1-#3) low water level that adds |
Among Fig. 6, T representation temperature measuring point, H representation level measuring point.Tiltedly to the unit of different capabilities, above-mentioned measuring point can suitably increase or reduce.
The utility model has the advantages that relevant temperature and the water level that can effectively monitor with the continuous pipeline of steam turbine body and steam turbine body, when parameter is out-of-limit, automatically send sound and light alarm, remind the operations staff to note, when steam turbine is intake, automatic switch has closing valve, prevent turbine water induction, it is a kind of multiple functional Water checking device for steam turbine.
Claims (5)
1, a kind of turbine water induction detection device, it is characterized in that it is by microcomputer, interface circuit, warning output circuit and temperature and water level parameter display device are formed, interface circuit comprises thermocouple converter amplifier circuit and the level measuring signal conversion amplification circuit of being with cold junction compensation, the warning output circuit comprises the acoustooptic alarm output driving circuit and drives executive circuit, microcomputer is by 8031 single-chip microcomputers, data, program storage, A/D, decoder, latch, keyboard display unit, printer is formed, the output of interface circuit is through the I/O of A/D to 8031 mouth, to temperature and water level parameter display device, the warning output circuit is connected to the P1.0-P1.3 of 8031 I/O passage through 8255 interface chips in 8031 output.
2, detection device according to claim 1, it is characterized in that thermocouple converter amplifier circuit with cold junction compensation is by operational amplifier, voltage to frequency converter, optoelectronic isolator is formed, operational amplifier is by G1, D1, R1, R2, R3 and zeroing circuit are formed, R1-R3 forms bleeder circuit, D1 is used for cold junction compensation, the two ends of thermocouple are connected to G1's respectively+1N and device ground, zeroing circuit is by G2, R4, R5, W2 forms, and W2 is used for the zeroing position, and the output of G2 is connected to 10 pin of G1, voltage to frequency converter is by VFG, W1 forms, and W1 is used for the regulated signal amplitude, and optoelectronic isolator is by TLP, R6, R7, R8 forms.
3, detection device according to claim 2, it is characterized in that level measuring signal conversion amplification circuit is made up of amplifier and optoelectronic isolator, amplifier is a two-stage, the first order is made up of G3 and outward element R1-R8, W1, the second level is made up of G4 and outward element R9-R11, W2, and optoelectronic isolator is made up of TLP and outward element R12-R15, C1.
4, detection device according to claim 3, it is characterized in that the acoustooptic alarm output driving circuit is made up of optoelectronic isolator TIL and outward element R1, R2, J1, D2, D3, driving executive circuit is made up of optoelectronic isolator TIL and outward element R3, R4, D4, D5, J1 controls each road water inlet and water level acoustooptic alarm by its contact, and J2 drives the actuating equipment recloser by its contact closing valve.
5, detection device according to claim 4 is characterized in that water level shows that the employing light beam shows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93205357 CN2147355Y (en) | 1993-03-13 | 1993-03-13 | Water checking device for steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93205357 CN2147355Y (en) | 1993-03-13 | 1993-03-13 | Water checking device for steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2147355Y true CN2147355Y (en) | 1993-11-24 |
Family
ID=33788651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93205357 Expired - Fee Related CN2147355Y (en) | 1993-03-13 | 1993-03-13 | Water checking device for steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2147355Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590096A (en) * | 2012-02-08 | 2012-07-18 | 杨英杰 | Moisture detecting method for overheated steam of steam pipeline of turbine |
| CN103683191A (en) * | 2012-09-12 | 2014-03-26 | 王江 | Air inlet passage wade protector for machine/equipment |
| CN111828102A (en) * | 2020-06-01 | 2020-10-27 | 大唐东北电力试验研究院有限公司 | Protection method for preventing water impact of steam turbine caused by sudden drop of main steam temperature |
| CN115929421A (en) * | 2023-01-10 | 2023-04-07 | 华电电力科学研究院有限公司 | Early warning method for preventing steam turbine from water inflow |
-
1993
- 1993-03-13 CN CN 93205357 patent/CN2147355Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590096A (en) * | 2012-02-08 | 2012-07-18 | 杨英杰 | Moisture detecting method for overheated steam of steam pipeline of turbine |
| CN103683191A (en) * | 2012-09-12 | 2014-03-26 | 王江 | Air inlet passage wade protector for machine/equipment |
| CN111828102A (en) * | 2020-06-01 | 2020-10-27 | 大唐东北电力试验研究院有限公司 | Protection method for preventing water impact of steam turbine caused by sudden drop of main steam temperature |
| CN115929421A (en) * | 2023-01-10 | 2023-04-07 | 华电电力科学研究院有限公司 | Early warning method for preventing steam turbine from water inflow |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |