CN216518172U - FCB function unit emergency shutdown protection device - Google Patents
FCB function unit emergency shutdown protection device Download PDFInfo
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- CN216518172U CN216518172U CN202122817127.0U CN202122817127U CN216518172U CN 216518172 U CN216518172 U CN 216518172U CN 202122817127 U CN202122817127 U CN 202122817127U CN 216518172 U CN216518172 U CN 216518172U
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Abstract
The utility model discloses an FCB functional unit emergency stop protection device, which comprises a main control unit, a main control unit and a main control unit, the main valve state input device detects a steam turbine main valve travel switch of the FCB functional unit to generate a main valve state signal, the AST oil pressure blocking signal input device detects AST oil pressure of a steam turbine main valve to generate an oil pressure signal, the steam turbine tripping hardware loop processing module is connected with the main valve state input device and the AST oil pressure blocking signal input device, the generator tripping hardware loop processing module receives an electric generator tripping signal, the steam turbine generator unit stop processing module is connected with the steam turbine tripping hardware loop processing module and the generator tripping hardware loop processing module, and the steam turbine generator unit stop processing module logically judges to obtain a normal steam turbine generator tripping signal based on the steam turbine tripping signal and the electric generator tripping signal.
Description
Technical Field
The utility model relates to the technical field of power equipment, in particular to an FCB functional unit emergency shutdown protection device.
Background
In the prior art, the shutdown protection of the steam turbine generator unit is completed through a steam turbine DEH control system or a steam turbine trip protection system ETS, when a steam turbine trip condition occurs, the DEH/ETS control system is triggered to complete the trip work of the steam turbine, and the protection work in the shutdown process of the steam turbine is sequentially started through the DEH or DCS, such as starting a turning gear, starting a direct-current oil pump, closing each section of steam extraction check valve, sending an instruction to each protection device, and triggering the related electrical protection devices and the like.
However, when a DCS, DEH, or ETS fails, such as a network failure, a DPU failure, a card failure, operator poisoning, or the like, the turbine may be damaged or destroyed because the turbine is only stopped by a manual button on the console, and the turbine is not stopped because the protection operation is blank. Therefore, the utility model discloses an emergency shutdown protection device for an FCB functional unit, which can effectively guarantee the safe shutdown of a steam turbine generator unit under the condition that DCS, DEH or ETS has faults.
The above information disclosed in this background section is only for enhancement of understanding of the background of the utility model and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an FCB functional unit emergency shutdown protection device, which comprises:
the main valve state input device comprises a steam turbine left side main valve state input module connected with a steam turbine left side main valve travel switch in the FCB functional unit and a steam turbine right side main valve state input module connected with a steam turbine right side main valve travel switch in the FCB functional unit;
the AST oil pressure cutoff signal input device comprises an AST oil pressure cutoff signal input module connected with a fuel oil pressure resistant switch;
the steam turbine tripping hardware loop processing module is connected with the main valve state input device and the AST oil pressure blocking signal input device;
the generator tripping hardware loop processing module is connected with the electric generator;
and the steam turbine generator set shutdown processing module is connected with the steam turbine trip hardware loop processing module and the generator trip hardware loop processing module.
In the FCB functional unit emergency shutdown protection device, the steam turbine generator unit shutdown processing module is connected with and sends signals to the boiler DCS, the electrical protection device and the SOE detection module.
In the FCB functional unit emergency shutdown protection device, the steam turbine tripping hardware loop processing module is connected with and sends a signal to the steam extraction check valve output module, wherein the check valve of the steam extraction check valve output module is used for preventing the steam turbine from entering water.
The FCB functional unit emergency shutdown protection device further comprises a display unit for displaying signals.
In the above technical solution, the emergency shutdown protection device for an FCB functional unit provided by the present invention has the following beneficial effects: in the FCB functional unit emergency shutdown protection device, the safe shutdown of the steam turbine generator unit can be effectively ensured under the condition that the DCS, the DEH or the ETS has faults, and the damage or the damage of the steam turbine generator is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a schematic structural diagram of an embodiment of an FCB functional unit emergency shutdown protection device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to fig. 1 of the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
In one embodiment, as shown in fig. 1, the FCB functional unit emergency shutdown protection device includes,
the main valve state input device detects a steam turbine main valve travel switch of an FCB functional unit to generate a main valve state signal, the main valve state input device comprises a steam turbine left side main valve state input module connected with the steam turbine left side main valve travel switch and a steam turbine right side main valve state input module connected with the steam turbine right side main valve travel switch, the main valve state input device detects the steam turbine main valve travel switch through a relay loop, in order to improve accuracy and prevent misjudgment, a three-out-of-two mode is adopted, after the input device collects three different sampling elements from the same medium parameter signal, selection is made through logic judgment preset by the relay loop, as long as any two signals in the three signals meet the condition, the condition is considered to be satisfied, otherwise, the steam turbine left side main valve state input module and the steam turbine right side main valve state input module can both receive three paths of in-situ travel switch signals, each local travel switch signal is a double-trigger loop, and finally a plurality of electric signals or dry contact signals are generated and provided for the steam turbine tripping hardware loop processing module.
The AST oil pressure cutoff signal input device comprises an AST oil pressure cutoff signal input module connected with a flame-resistant oil pressure switch, the AST oil pressure cutoff signal input device outputs an electric contact signal through a pressure switch after measuring an oil pressure signal, in order to improve the accuracy and prevent misjudgment, a two-out-of-three mode is adopted, the AST oil pressure cutoff signal input device collects three different sampling elements from the same medium parameter signal and makes selection through preset logic judgment of a relay loop, as long as any two signals in the three signals meet the condition, the condition is considered to be satisfied, or not, further, the AST oil pressure cutoff signal input device is a single chip microcomputer loop or a relay loop and can receive three local pressure switch signals, and generating an electric signal and providing the electric signal to a steam turbine tripping hardware loop processing module.
Steam turbine tripping operation hardware loop processing module, it connects main steam valve state input device and AST oil pressure shutoff signal input device, based on main steam valve state signal and oil pressure signal generate steam turbine tripping operation signal, and steam turbine tripping operation hardware loop processing module judges the processing to the signal of telecommunication of main steam valve state input device processing, the signal of telecommunication of AST oil pressure shutoff signal input device, confirms under emergency, whether the steam turbine really trips, can prevent not moving, with this simultaneously, in order to prevent to refuse, each input template all adopts the mode of two of three, improves the rate of accuracy.
The generator tripping hardware loop processing module receives an electrical generator tripping signal, inputs the electrical generator tripping signal for preventing misjudgment or rejection, obtains a prepared signal by adopting a two-out-of-three mode and provides the prepared signal for the steam turbine generator set stopping processing module, and the steam turbine generator set stopping processing module finally determines that the steam turbine generator set stops successfully according to electric signals input at two sides of the steam turbine tripping hardware loop processing module and the generator tripping hardware loop processing module. The standing horse triggers a steam turbine and generator protection instruction through a steam turbine generator set stop output module, so that each device is operated in the steam turbine DCS or DEH abnormal working condition, and the steam turbine stop state of each device is installed, and the safety of the steam turbine and the generator is protected.
And the steam turbine generator set stop processing module is connected with the steam turbine trip hardware loop processing module and the generator trip hardware loop processing module, and the steam turbine generator set stop processing module logically judges to obtain a normal steam turbine generator trip signal based on the steam turbine trip signal and the electrical generator trip signal. Normally, a trip signal of a steam turbine generator of a unit is controlled and judged by a DCS or DEH controller, the DCS or DEH controller is an electronic controller system and has several defects, 1, as the production time of the control system is prolonged, equipment is easy to age, and the reliability is poor; and 2, the steam turbine generator set is easy to be poisoned, because the controller needs to be connected with an industrial personal computer for operation, the steam turbine generator set is possibly poisoned under the condition that no external protection is made, for this reason, the steam turbine generator set stop processing module is used as a backup means of the steam turbine generator set, and under the condition that a DCS or DEH control system breaks down, field signals are directly collected, and under the condition that the steam turbine generator trips, a series of protection measures are taken to prevent the steam turbine generator from being damaged.
In the preferred embodiment of the FCB functional unit emergency shutdown protection device, the steam turbine generator unit shutdown processing module is connected with and sends signals to the boiler DCS, the electrical protection device and the SOE detection module.
In the preferred embodiment of the emergency shutdown protection device for the FCB functional unit, the steam turbine trip hardware loop processing module is connected with and sends a signal to the steam extraction check valve output module.
In the preferred embodiment of the emergency shutdown protection device for the FCB functional unit, the steam turbine trip hardware loop processing module starts a check valve of the steam extraction check valve output module to prevent the steam turbine from water inflow.
In a preferred embodiment of the FCB function unit emergency shutdown protection device, the FCB function unit emergency shutdown protection device further comprises a display unit for displaying a signal.
In one embodiment, the protection device comprises a main valve state input device, an AST oil pressure interruption signal input device, a generator tripping hardware loop processing module, a steam turbine tripping hardware loop processing module, a steam extraction starting check valve output module, a steam turbine generator set stop processing module and a steam turbine generator set stop output module.
In one embodiment, the protection device includes, a main valve state input device (left/right): the main steam valve travel switch of the steam turbine is detected, because the output of the main steam valve travel switch of the steam turbine is the switch quantity, in order to prevent the operation rejection or the false operation, a hard protection logic of three-taking two is adopted, the main steam valve state signal is effectively detected, an AST oil pressure interruption signal input device is an auxiliary judgment device of the main steam valve state input device, the AST oil pressure of the main steam valve of the steam turbine is detected, the hard protection logic of three-taking two is adopted, and the device mainly prevents the main steam valve travel switch of the steam turbine from moving. The steam turbine tripping hardware loop processing module is connected with a main steam valve state input device (left side/right side) and an AST oil pressure blocking signal input device through electric signals, the signals of the two devices are processed to obtain a correct steam turbine tripping signal, the processing module can prevent a main steam valve travel switch from being mistakenly operated, and particularly, a unit with an FCB function is quick in main steam valve reaction and frequent in action, so that the main steam valve travel switch is easily damaged or mistakenly operated. The steam turbine tripping hardware loop processing module can effectively avoid the situation, and sends a series of action instructions for steam turbine protection after a correct conclusion is obtained, for example, the steam turbine tripping hardware loop processing module directly acts the check valves of each steam extraction through the steam extraction check valve output modules from #1 to #6 to prevent the steam turbine from water inflow, and simultaneously sends a steam turbine tripping signal to the steam turbine generator set stopping processing module.
The steam turbine generator set shutdown processing module carries out logic judgment according to electric signals of the steam turbine tripping hardware loop processing module and the generator tripping hardware loop processing module to obtain a normal steam turbine generator tripping signal, and sends a comprehensive signal to a boiler DCS, an electric protection device, an SOE detection and the like to ensure the safe and stable operation of each protection device in the steam turbine shutdown process.
Industrial applicability
The FCB functional unit emergency shutdown protection device can be used in the FCB functional unit.
Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the utility model. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the utility model.
Claims (4)
1. An FCB functional unit emergency shutdown protection device is characterized by comprising,
the main valve state input device comprises a steam turbine left side main valve state input module connected with a steam turbine left side main valve travel switch in the FCB functional unit and a steam turbine right side main valve state input module connected with a steam turbine right side main valve travel switch in the FCB functional unit;
the AST oil pressure cutoff signal input device comprises an AST oil pressure cutoff signal input module connected with a fuel oil pressure resistant switch;
the steam turbine tripping hardware loop processing module is connected with the main valve state input device and the AST oil pressure blocking signal input device;
the generator tripping hardware loop processing module is connected with the electric generator;
and the steam turbine generator set shutdown processing module is connected with the steam turbine trip hardware loop processing module and the generator trip hardware loop processing module.
2. The FCB functional unit emergency shutdown protection device of claim 1, wherein the steam generator unit shutdown processing module is connected to and sends signals to the boiler DCS, the electrical protection device and the SOE detection module.
3. The FCB functional unit emergency shutdown protection device of claim 1, wherein the steam turbine trip hardware loop processing module is connected to and sends a signal to the steam extraction check valve output module, wherein a check valve of the steam extraction check valve output module is used to prevent water from entering the steam turbine.
4. The FCB-capable unit emergency shutdown protection device of claim 1, further comprising a display unit for displaying a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122817127.0U CN216518172U (en) | 2021-11-17 | 2021-11-17 | FCB function unit emergency shutdown protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122817127.0U CN216518172U (en) | 2021-11-17 | 2021-11-17 | FCB function unit emergency shutdown protection device |
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| Publication Number | Publication Date |
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| CN216518172U true CN216518172U (en) | 2022-05-13 |
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| CN202122817127.0U Active CN216518172U (en) | 2021-11-17 | 2021-11-17 | FCB function unit emergency shutdown protection device |
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