CN111706407A - Steam turbine emergency trip control module - Google Patents
Steam turbine emergency trip control module Download PDFInfo
- Publication number
- CN111706407A CN111706407A CN202010570994.6A CN202010570994A CN111706407A CN 111706407 A CN111706407 A CN 111706407A CN 202010570994 A CN202010570994 A CN 202010570994A CN 111706407 A CN111706407 A CN 111706407A
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- China
- Prior art keywords
- pressure
- control module
- stop valve
- steel pipe
- seamless steel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
-
- 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
- F01D21/003—Arrangements for testing or measuring
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- 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
- F01D21/20—Checking operation of shut-down devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention provides a turbine emergency trip control module, and relates to the technical field of turbine control. This steam turbine emergency interruption control module, including pressure transmitter, stop valve, high-pressure elbow, seamless steel pipe and DCS rack, the one end that seamless steel pipe is close to the stop valve is connected with high-pressure elbow, the one end that seamless steel pipe was kept away from to high-pressure elbow is passed through the pipeline and is connected with the stop valve, the one end that high-pressure elbow was kept away from to the stop valve is connected with pressure transmitter, pressure transmitter passes through the cable and is connected with the DCS rack. According to the invention, the added pressure transmitter can record the ASP oil pressure fluctuation trend through the DCS system, analysis after ASP switch alarming is facilitated, and meanwhile, when the indication values of the switch and the pressure gauge are deviated, the pressure transmitter can be used as a third-party data source to help evidence, so that risks brought by designing and processing a critical interruption control module are avoided, and the aims of online replacement and maintenance can be realized by only adding one stop valve aiming at the ASP pressure gauge.
Description
Technical Field
The invention relates to the technical field of steam turbine control, in particular to a steam turbine emergency trip control module.
Background
A steam turbine is an external combustion rotary machine that can convert steam heat energy into mechanical work. After steam from a boiler enters a steam turbine, the steam passes through a series of nozzles and movable blades which are arranged in an annular mode in sequence, heat energy of the steam is converted into mechanical energy for rotating a rotor of the steam turbine, and the steam is subjected to energy conversion in the steam turbine in different modes, so that the steam turbine with different working principles is formed.
At present, the high-pressure fire resistant oil regulating system who uses in the current steam turbine trade provides regulation and guard action for steam turbine normal operating, and emergency interruption control module is the protection device who protects steam turbine normal operating and emergency shutdown in the high-pressure fire resistant oil system, but, current emergency interruption control module has following problem:
firstly, when the ASP1 and ASP2 switches alarm due to oil leakage of the throttle hole, technicians can only compare the ASP pressure switch with an ASP pressure gauge on site, and the real change trend of the ASP oil pressure cannot be recorded and the accident cannot be deeply analyzed due to no history curve; secondly, both the ASP switch and the ASP pressure gauge have the conditions of faults, misoperation and the like, fewer measuring points have no third-party data for evidence assistance, and the data analysis difficulty during accidents is increased; and thirdly, about 1m of a sampling pipeline of the ASP pressure meter is not designed with a secondary door, although the requirement that the secondary door is configured when a second in-situ pressure instrument used for measuring the working pressure of a medium of steam, water and oil is larger than 1MPa and the length of a cutting pipeline is larger than 3m in the technical guide rule of reliability evaluation of a thermal automation system of a DL/T261-2012 thermal power plant (6.6.1.2 pressure source-taking device and valve reliability a) is met, the online isolation cannot be realized when the pressure meter and the source-taking pipeline have leakage or even a dial plate is cracked, and even the non-stop of a steam turbine can be caused when the leakage amount of EH oil is too large.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects in the prior art, the invention provides a turbine emergency trip control module, which solves the defects and shortcomings in the prior art.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a steam turbine emergency interruption control module, control module includes pressure transmitter, stop valve, high-pressure elbow, seamless steel pipe and DCS rack, the one end that seamless steel pipe is close to the stop valve is connected with high-pressure elbow, the one end that seamless steel pipe was kept away from to high-pressure elbow is passed through the pipeline and is connected with the stop valve, the one end that high-pressure elbow was kept away from to the stop valve is connected with pressure transmitter, pressure transmitter passes through the cable and is connected with the DCS rack.
Preferably, the pressure transmitter is WIKAA-10/0-16MPA in model, the cable adopts two-core shielding cable, the cable is twisted by two tinned copper core insulated wires and a bare tinned copper core shielding wire, then a shielding layer is arranged, and finally an insulating sheath is additionally arranged, the specification of the insulated wires is #18AWG, the specification of the shielding wire is #20AWG, and the rated voltage of the cable is 300V.
Preferably, the model of the stop valve is NV11-BW4-U02G-316/DN6, 316SS, the maximum working pressure of DN6 is 6000psi, the working temperature is-54 ℃ -649 ℃, the inlet and the outlet of the stop valve are welded by 10mm, the inner drift diameter is 6mm, graphite packing is adopted, the valve rod is made of titanium alloy steel in an explosion-proof design, and the valve seat is made of Monel alloy in a build-up welding manner.
Preferably, the specification of the high-pressure elbow is phi 7.1 × 3/022Cr17Ni12Mo2The working pressure is 40 Mpa.
Preferably, the seamless steel pipe has the specification of phi 10 x 2/022022Cr17Ni12Mo2The model of the seamless steel pipe is HMT10-6MTP1-316L, the 316SS working pressure is 48Mpa, and the inner surface and the outer surface of the seamless steel pipe are both polished.
Preferably, a DCS system is installed in the DCS cabinet and used for recording the ASP oil pressure fluctuation trend.
The working principle is as follows: increase a pressure transmitter about ASP, increase a stop valve (secondary door) about the ASP manometer, the pressure transmitter that increases simultaneously can pass through DCS system record ASP oil pressure fluctuation trend, the analysis after the ASP switch reports to the police is helped, simultaneously when switch and manometer registration deviation appear, pressure transmitter can assist the evidence as third party data source, the design has been removed from, the risk that processing critical interruption control module brought, and only increase a stop valve (secondary door) to the ASP manometer, can realize online change, the target of maintenance.
(III) advantageous effects
The invention provides a turbine emergency trip control module. The method has the following beneficial effects:
according to the invention, the ASP pressure transmitter is additionally arranged, the stop valve related to the ASP pressure gauge is additionally arranged, the additionally arranged pressure transmitter can record the ASP oil pressure fluctuation trend through the DCS system, the analysis after the ASP switch gives an alarm is facilitated, and meanwhile, when the indication values of the switch and the pressure gauge are deviated, the pressure transmitter can be used as a third-party data source to help the evidence, the risk brought by designing and processing a critical interruption control module is avoided, and the goal of online replacement and maintenance can be realized by only additionally arranging the stop valve for the ASP pressure gauge.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1, an embodiment of the present invention provides a turbine emergency trip control module, which includes a pressure transmitter 1, a stop valve 2, a high-pressure elbow 3, a seamless steel pipe 4 and a DCS cabinet 5, where one end of the seamless steel pipe 4 close to the stop valve 2 is connected to the high-pressure elbow 3, one end of the high-pressure elbow 3 far away from the seamless steel pipe 4 is connected to the stop valve 2 through a pipeline, one end of the stop valve 2 far away from the high-pressure elbow 3 is connected to the pressure transmitter 1, and the pressure transmitter 1 is connected to the DCS cabinet 5 through a cable.
The pressure transmitter 1 is in the type of WIKAA-10/0-16MPA, the cable adopts a two-core shielding cable, the cable is formed by twisting two tinned copper core insulated conductors and a bare tinned copper core shielding wire, then a shielding layer is arranged, and finally an insulating sheath is additionally arranged, the specification of the insulated conductors is #18AWG, the specification of the shielding wire is #20AWG, and the rated voltage of the cable is 300V.
The model of the stop valve 2 is NV11-BW4-U02G-316/DN6, 316SS, DN6 has the maximum working pressure of 6000psi, the working temperature of-54 ℃ to 649 ℃, the inlet and the outlet of the stop valve 2 are welded by 10mm, the inner drift diameter is 6mm, graphite packing is adopted, the valve rod is made of titanium alloy steel in an explosion-proof design, and the valve seat is made of Monel alloy and resists high-temperature scouring.
The specification of the high-pressure elbow 3 is phi 7.1 x 3/022Cr17Ni12Mo2The working pressure is 40 Mpa; the 4 specification of the seamless steel pipe is phi 10 x 2/022022Cr17Ni12Mo2The model of the seamless steel tube 4 is HMT10-6MTP1-316L, the 316SS working pressure is 48Mpa, and the inner surface and the outer surface of the seamless steel tube 4 are both polished; and a DCS system is arranged in the DCS cabinet 5 and used for recording the ASP oil pressure fluctuation trend.
According to the invention, the ASP pressure transmitter 1 is additionally arranged, the stop valve 2 is additionally arranged, the ASP pressure gauge is additionally arranged, the additionally arranged pressure transmitter 1 can record the ASP oil pressure fluctuation trend through a DCS system, analysis after ASP switch alarming is facilitated, meanwhile, when the indication values of the switch and the pressure gauge are deviated, the pressure transmitter 1 can be used as a third-party data source to assist in evidence, risks caused by designing and processing a critical interruption control module are avoided, and the goal of online replacement and maintenance can be realized by only additionally arranging the stop valve 2 for the ASP pressure gauge.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a steam turbine emergency trip control module which characterized in that: control module includes pressure transmitter, stop valve, high-pressure elbow, seamless steel pipe and DCS rack, the one end that seamless steel pipe is close to the stop valve is connected with high-pressure elbow, the one end that seamless steel pipe was kept away from to high-pressure elbow is passed through the pipeline and is connected with the stop valve, the one end that high-pressure elbow was kept away from to the stop valve is connected with pressure transmitter, pressure transmitter passes through the cable and is connected with the DCS rack.
2. The turbine trip control module of claim 1, wherein: the pressure transmitter is characterized in that the pressure transmitter is WIKAA-10/0-16MPA in model, the cable is a two-core shielding cable, the cable is formed by twisting two tinned copper core insulated wires and a bare tinned copper core shielding wire, then a shielding layer is arranged, and finally an insulating sheath is additionally arranged, the specification of the insulated wires is #18AWG, the specification of the shielding wire is #20AWG, and the rated voltage of the cable is 300V.
3. The turbine trip control module of claim 1, wherein: the model of the stop valve is NV11-BW4-U02G-316/DN6, 316SS, the maximum working pressure of DN6 is 6000psi, the working temperature is-54 ℃ -649 ℃, the inlet and the outlet of the stop valve are welded by 10mm, the inner drift diameter is 6mm, graphite packing is adopted, the valve rod is made of titanium alloy steel in an explosion-proof design, and the valve seat is made of Monel alloy in a build-up welding manner.
4. According to claim 1The steam turbine emergency trip control module is characterized in that: the specification of the high-pressure elbow is phi 7.1 x 3/022Cr17Ni12Mo2The working pressure is 40 Mpa.
5. The turbine trip control module of claim 1, wherein: the seamless steel pipe has the specification of phi 10 x 2/022022Cr17Ni12Mo2The model of the seamless steel pipe is HMT10-6MTP1-316L, the 316SS working pressure is 48Mpa, and the inner surface and the outer surface of the seamless steel pipe are both polished.
6. The turbine trip control module of claim 1, wherein: and a DCS system is arranged in the DCS cabinet and used for recording the ASP oil pressure fluctuation trend.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570994.6A CN111706407A (en) | 2020-06-22 | 2020-06-22 | Steam turbine emergency trip control module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010570994.6A CN111706407A (en) | 2020-06-22 | 2020-06-22 | Steam turbine emergency trip control module |
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| Publication Number | Publication Date |
|---|---|
| CN111706407A true CN111706407A (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010570994.6A Pending CN111706407A (en) | 2020-06-22 | 2020-06-22 | Steam turbine emergency trip control module |
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|---|---|
| CN (1) | CN111706407A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3572958A (en) * | 1969-05-27 | 1971-03-30 | Gen Electric | Electrohydraulic control with throttle pressure compensator |
| US3931714A (en) * | 1974-06-06 | 1976-01-13 | Westinghouse Electric Corporation | Electrohydraulic emergency trip system and method for a turbine power plate |
| CN203099797U (en) * | 2012-12-31 | 2013-07-31 | 深圳市广前电力有限公司 | Device based on preventing medium-pressure water supply safety door of combined cycle unit from frequent actions |
| CN205779044U (en) * | 2016-05-30 | 2016-12-07 | 华电（北京）热电有限公司 | A kind of turbine emergency interrupting system |
-
2020
- 2020-06-22 CN CN202010570994.6A patent/CN111706407A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3572958A (en) * | 1969-05-27 | 1971-03-30 | Gen Electric | Electrohydraulic control with throttle pressure compensator |
| US3931714A (en) * | 1974-06-06 | 1976-01-13 | Westinghouse Electric Corporation | Electrohydraulic emergency trip system and method for a turbine power plate |
| CN203099797U (en) * | 2012-12-31 | 2013-07-31 | 深圳市广前电力有限公司 | Device based on preventing medium-pressure water supply safety door of combined cycle unit from frequent actions |
| CN205779044U (en) * | 2016-05-30 | 2016-12-07 | 华电（北京）热电有限公司 | A kind of turbine emergency interrupting system |
Non-Patent Citations (1)
| Title |
|---|
| 秦宁: "浅析给水泵汽轮机跳闸回路改造", 《广西电力》 * |
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Application publication date: 20200925 |