CN201661320U - Steam turbine overflowing steam extraction regulation device for industrial driving - Google Patents
Steam turbine overflowing steam extraction regulation device for industrial driving Download PDFInfo
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- CN201661320U CN201661320U CN200920273960XU CN200920273960U CN201661320U CN 201661320 U CN201661320 U CN 201661320U CN 200920273960X U CN200920273960X U CN 200920273960XU CN 200920273960 U CN200920273960 U CN 200920273960U CN 201661320 U CN201661320 U CN 201661320U
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- steam
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- extraction
- steam turbine
- overflowing
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Abstract
The utility model discloses a steam turbine overflowing steam extraction regulation device for industrial driving, comprising an overflowing steam extraction control valve which is arranged on an overflowing pipeline and is connected with a pressure transmitter by a signal, the pressure transmitter is arranged on a steam extraction total pipeline, the overflowing pipeline is communicated with the steam extraction total pipeline, and the pressure transmitter is arranged at the front end of the overflowing pipeline; the steam turbine overflowing steam extraction regulation device for industrial driving and a control method thereof solve the problem that the conventional internal lifting plate type steam extraction regulation steam valve has large occupied space and complex structure and overcome the problem that critical speed of the steam turbine, caused by structural disadvantages, is hard to pass a barrier, adjustable steam extraction of the steam turbine for industrial driving is realized, the steam extraction pressure and flow rate can be effectively controlled when a great amount of steam is extracted, the requirements of process flow to steam balance can be met to the maximum extent, the efficiency of the whole steam system is improved and the steam turbine overflowing steam extraction regulation device achieves the energy-saving purpose.
Description
Technical field
The utility model relates to a kind of Steam Turhine Adjustment device, especially a kind of overflow steam extraction adjusting device of industrial drive steam turbine.
Background technique
Along with development of science and technology, the energy-consuming demand increases rapidly, and people have proposed very high requirement to efficiency of energy utilization.For impulse industrial drives steam turbine, realize that adjustable drawing gas can guarantee the stability of exhaust point pressure and heating load effectively, improve unit efficiency.The impulse industrial drives with the structures shape of steam turbine self rotor to have span bigger than normal, flexible bigger characteristics, and critical speed of rotation is difficult to reach a standard.Conventional steam turbine adopts existing inside to carry board-like adjusting vapor extraction device, this adjusting vapor extraction device takes up room greatly and complex structure, thereby cause turbine rotor bearing span further to increase, and then cause steam turbine critical speed of rotation to be difficult to reach a standard, finally cause the steam turbine complex structure, manufacture cost rises, and the unit operation safety coefficient descends.
Summary of the invention
The purpose of this utility model is provide for the deficiency that solves above-mentioned technology a kind of simple in structure, take up room little, guarantee exhaust point pressure and the stable overflow steam extraction adjusting device of industrial drive steam turbine of heating load.
In order to achieve the above object, the overflow steam extraction adjusting device of industrial drive steam turbine that the utility model is designed, it comprises the overflow extraction control valve, described overflow extraction control valve is arranged on the overflow passage, and be connected with a pressure transmitter signal, pressure transmitter is arranged on the main pipe rail that draws gas, and overflow passage is communicated with the main pipe rail that draws gas, and described pressure transmitter is positioned at the front end of overflow passage.Use in the steam turbine in industrial drives, by demarcation strip is set at cylinder internal cylinder is divided into high-pressure cylinder and low pressure (LP) cylinder, the main pipe rail that draws gas is communicated with high-pressure cylinder, overflow passage is communicated with low pressure (LP) cylinder, described pressure transmitter is then between high-pressure cylinder and overflow passage, this controlling device makes this air-channel system form the closed loop control system of an extraction pressure, if hot user's amount of drawing gas increases, then overflow extraction control valve aperture turns down, otherwise then overflow extraction control valve aperture increases, and guarantees the stable of exhaust point pressure.
In order to guarantee the stability of steam, this overflow steam extraction adjusting device of industrial drive steam turbine also can comprise the main admission modulating valve that is arranged on the main steam inlet tube road, this main admission modulating valve is connected with the signals of rotational speed sensor that at least one is used for MEASUREMENT OF STEAM turbine wheel rotating speed, this speed probe provides the tach signal of regulating institute's foundation for main admission modulating valve, forms according to the speed closed loop control system that guarantees to be driven the machine load.Wherein speed probe can guarantee the reliability of data for a plurality of during data capture.
In order to realize good automatic control, preferred scheme is that described pressure transmitter is connected with regulator signal with speed probe, described main admission modulating valve and overflow extraction control valve are the modulating valve that surges, and described regulator is electrically connected with main admission modulating valve and overflow extraction control valve respectively by corresponding electro-control converter.Except this electric liquid regulative mode, also can adopt pneumatic regulation technology or motorized adjustment technology.Regulator can be PLC, also can be various with single-chip microcomputer, DSP etc. be the regulator of core with the microprocessor.
In order in case of emergency to cut off steam rapidly, guarantee the safety of steam turbine, this overflow steam extraction adjusting device of industrial drive steam turbine also can comprise be arranged on the main steam inlet tube road and the main pipe rail that draws gas on quick-closing valve.
The resulting overflow steam extraction adjusting device of industrial drive steam turbine of the utility model, having solved conventional inside carries board-like drawing gas and regulates steam valve big, the baroque problem that takes up room, overcome the problem that steam turbine critical speed of rotation that structural imperfection caused is difficult to reach a standard, realized that the adjustable of industrial drives steam turbine draw gas, extraction pressure and extraction flow when big flow draws gas all are effectively controlled, satisfied the requirement of technological process to greatest extent to balance of steam, improve the efficient of whole vapour system, reached purpose of energy saving.
Description of drawings
Fig. 1 is the utility model embodiment 1 a structural representation.
Among the figure: main steam inlet tube road 1, high-pressure cylinder 2, low pressure (LP) cylinder 3, the main pipe rail 4 that draws gas, overflow passage 5, electro-control converter 6, overflow extraction control valve 7, pressure transmitter 8, main admission modulating valve 9, speed probe 10, regulator 11, quick-closing valve 12.
Embodiment
The utility model will be further described in conjunction with the accompanying drawings below by embodiment.
As shown in Figure 1, the described overflow steam extraction adjusting device of industrial drive steam turbine of present embodiment, it comprises overflow extraction control valve 7, described overflow extraction control valve 7 is arranged on the overflow passage 5, and be connected with a pressure transmitter 8 signals, pressure transmitter 8 is arranged on the main pipe rail 4 that draws gas, and overflow passage 5 is communicated with the main pipe rail 4 that draws gas, described pressure transmitter 8 is positioned at the front end of overflow passage 5, specifically between high-pressure cylinder 2 and overflow passage 5.With in the steam turbine, the main pipe rail 4 that draws gas is communicated with high-pressure cylinder 2 in industrial drives, and overflow passage 5 is communicated with low pressure (LP) cylinder 3, thereby can form the closed loop control system of an extraction pressure.In order to guarantee the stability of steam, this overflow steam extraction adjusting device of industrial drive steam turbine also comprises the main admission modulating valve 9 that is arranged on the main steam inlet tube road 1, this main admission modulating valve 9 is connected with two speed probe 10 signals that are used for MEASUREMENT OF STEAM turbine wheel rotating speed, this speed probe 10 provides the tach signal of regulating institute's foundation for main admission modulating valve 9, forms according to the speed closed loop control system that guarantees to be driven the machine load.Pressure transmitter 8 is connected with WOODWARD505E regulator 11 signals with speed probe 10, two of WOODWARD505E regulator 11 tach signal input channels " sensor# 1 " reach " sensor# 2 " and are connected with two speed probes specifically, and analog input channel " AnalogInput#1 " links to each other with pressure transmitter 8.Described main admission modulating valve 9 and overflow extraction control valve 7 are the modulating valve that surges, and described regulator 11 is electrically connected with main admission modulating valve 9 and overflow extraction control valve 7 respectively by corresponding electro-control converter 6.In order in case of emergency to cut off steam rapidly, guarantee the safety of steam turbine, this overflow steam extraction adjusting device of industrial drive steam turbine also comprises the quick-closing valve 12 that is arranged on the main steam inlet tube road 1 and the main pipe rail 4 that draws gas.
The controlling method of above-mentioned overflow steam extraction adjusting device of industrial drive steam turbine, it adopts modulating valve steam regulation amount, it is characterized in that overflow extraction control valve 7 being set at overflow passage 5, by the steam flow of overflow extraction control valve 7 control flows, with the stability of the user's that reduces phlegm and internal heat in this main pipe rail 4 that guarantees to draw gas steam through overflow passage 5.The control of steam flow of overflow passage 5 of flowing through is to be the closed loop control that the modulating valve control signal forms with the pressure signals in the main pipe rail 4 that draws gas, and adopt main admission modulating valve 9 is set on main steam inlet tube road 1, and be feedback signal with the rotating speed of turbine rotor, throttle flow is carried out closed loop control, guarantee the stable of initial steam pressure, the steam fluctuation is less in the also feasible main pipe rail 4 that draws gas.
During work, main steam is entered by main steam inlet tube road 1, after steam turbine high-pressure cylinder 2 actings, flow out from the main pipe rail 4 that draws gas of steam turbine high-pressure cylinder 2, one the tunnel through draw gas main pipe rail 4 and the quick-closing valve 12 that the draws gas user that reduces phlegm and internal heat, one the tunnel through overflow extraction control valve 7, is back to low pressure (LP) cylinder 3 from the overflow passage 5 of steam turbine and continues acting.After WOODWARD505E regulator 11 compares pressure signal and pressure of extracted steam from turbine setting value, output control signal 4 ~ 20mA, convert corresponding secondary oil pressure 0.15 ~ 0.45Mpa to through electro-control converter 6, secondary oil pressure SC sigmal control overflow extraction control valve 7 apertures, thereby control extraction flow and extraction pressure.When hot user's amount of drawing gas increased, overflow extraction control valve 7 apertures turned down, and guaranteed that extraction pressure does not descend; When hot user's amount of drawing gas reduced, overflow extraction control valve 7 apertures increased, and guaranteed that extraction pressure does not improve; WOODWARD505E regulator 11 receives the turbine rotor tach signal simultaneously, according to giving provisioning request Signal Regulation master admission modulating valve 9 apertures, the stability of control steam, the requirement of guaranteed output.
The overflow steam extraction adjusting device of industrial drive steam turbine that present embodiment is described disposes the controlling device of drawing gas on as the overflow passage of exterior line, the extraction pressure of having realized steam turbine is adjustable, it is little to take up room, having solved conventional inside carries board-like drawing gas and regulates steam valve and take up room greatly, baroque problem, overcome the problem that steam turbine critical speed of rotation that structural imperfection caused is difficult to reach a standard, extraction pressure and extraction flow when big flow draws gas are controlled, realized that the adjustable of industrial drives steam turbine draw gas, satisfied the requirement of technological process to greatest extent to balance of steam, improve the efficient of whole vapour system, reached purpose of energy saving.
Claims (4)
1. overflow steam extraction adjusting device of industrial drive steam turbine, it comprises the overflow extraction control valve, it is characterized in that described overflow extraction control valve is arranged on the overflow passage, and be connected with a pressure transmitter signal, pressure transmitter is arranged on the main pipe rail that draws gas, overflow passage is communicated with the main pipe rail that draws gas, and described pressure transmitter is positioned at the front end of overflow passage.
2. overflow steam extraction adjusting device of industrial drive steam turbine according to claim 1, it is characterized in that also comprising the main admission modulating valve that is arranged on the main steam inlet tube road, this main admission modulating valve is connected with the signals of rotational speed sensor that at least one is used for MEASUREMENT OF STEAM turbine wheel rotating speed, and this speed probe provides the tach signal of regulating institute's foundation for main admission modulating valve.
3. overflow steam extraction adjusting device of industrial drive steam turbine according to claim 2, it is characterized in that described pressure transmitter is connected with regulator signal with speed probe, described main admission modulating valve and overflow extraction control valve are the modulating valve that surges, and described regulator is electrically connected with main admission modulating valve and overflow extraction control valve respectively by corresponding electro-control converter.
4. according to claim 1 or 2 or 3 described overflow steam extraction adjusting device of industrial drive steam turbine, it is characterized in that also comprising be arranged on the main steam inlet tube road and the main pipe rail that draws gas on quick-closing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920273960XU CN201661320U (en) | 2009-11-27 | 2009-11-27 | Steam turbine overflowing steam extraction regulation device for industrial driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920273960XU CN201661320U (en) | 2009-11-27 | 2009-11-27 | Steam turbine overflowing steam extraction regulation device for industrial driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201661320U true CN201661320U (en) | 2010-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920273960XU Expired - Lifetime CN201661320U (en) | 2009-11-27 | 2009-11-27 | Steam turbine overflowing steam extraction regulation device for industrial driving |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701531B (en) * | 2009-11-27 | 2013-01-30 | 杭州中能汽轮动力有限公司 | Overflow steam extraction adjusting device of industrial drive steam turbine and control method thereof |
| CN103649474A (en) * | 2011-07-14 | 2014-03-19 | 西门子公司 | Steam turbine installation and method for operating the steam turbine installation |
| CN110242367A (en) * | 2019-07-17 | 2019-09-17 | 杭州汽轮机股份有限公司 | Steam extraction and condensing formula industrial steam turbine |
-
2009
- 2009-11-27 CN CN200920273960XU patent/CN201661320U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701531B (en) * | 2009-11-27 | 2013-01-30 | 杭州中能汽轮动力有限公司 | Overflow steam extraction adjusting device of industrial drive steam turbine and control method thereof |
| CN103649474A (en) * | 2011-07-14 | 2014-03-19 | 西门子公司 | Steam turbine installation and method for operating the steam turbine installation |
| CN103649474B (en) * | 2011-07-14 | 2015-12-23 | 西门子公司 | Steam turbine installation and the method for running steam turbine installation |
| US9322298B2 (en) | 2011-07-14 | 2016-04-26 | Siemens Aktiengesellschaft | Steam turbine installation and method for operating the steam turbine installation |
| CN110242367A (en) * | 2019-07-17 | 2019-09-17 | 杭州汽轮机股份有限公司 | Steam extraction and condensing formula industrial steam turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101201 Effective date of abandoning: 20091127 |
|
| RGAV | Abandon patent right to avoid regrant |