Protection module

Abstract

The utility model discloses a protection module, and relates to the field of turbine ETS and boiler MFT protection systems, the protection module comprises a power supply module and a logic determination module connected with the power supply module, the power supply module is used for supplying power to the logic determination module; the logic judgment module is used for carrying out logic judgment on an input signal group so as to output an output signal group according to the input signal group, and the logic judgment module comprises a plurality of signal one-out-of-two sub-modules, a plurality of signal two-out-of-three sub-modules and / or a plurality of signal one-out-of-more sub-modules. The protection module simplifies a control system through modularization, and has the advantages of light volume, easy maintenance and low cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam turbine ETS and boiler MFT protection system field, especially a protection module. BACKGROUND

[0002] The conventional steam turbine ETS (Emergency Trip System) and boiler MFT (Main Fuel Trip) protection system need to set a set of redundant, independent control system to carry out logic judgment to the key signal, but this method will occupy a larger space in physics, and the maintenance and upgrade of the system need to be carried out by professional manufacturers in the later period, which is not easy to install for small-scale steam turbines and boilers, is difficult to maintain, cannot be expanded and has a large cost. INVENTION CONTENTS

[0003] The applicant proposes a protection module aiming at the above problems and technical needs.

[0004] The technical scheme of the utility model is as follows:

[0005] A protection module, comprising a power module and a logic judgment module connected with the power module, the power module is used for power supply for the logic judgment module;

[0006] The logic judgment module is used for logic judgment to the input signal group to output the output signal group according to the input signal group, and the logic judgment module comprises a plurality of signal two-take-one sub-modules, a plurality of signal three-take-two sub-modules and / or a plurality of signal multi-take-one sub-modules.

[0007] Further technical scheme, the power module includes a first switching power supply, a second switching power supply, a first power supply indicator, a second power supply indicator, a power supply bus and a power module terminal block, wherein,

[0008] The power module terminal block includes a first power supply input terminal and a second power supply input terminal;

[0009] The input end of the first switching power supply is connected with the power supply through the first power supply input terminal, and the input end of the second switching power supply is connected with the power supply through the second power supply input terminal;

[0010] The positive output end and the negative output end of the first switching power supply are connected with the power supply bus, and the positive output end and the negative output end of the second switching power supply are connected with the power supply bus;

[0011] Further technical scheme, the first power supply indicator is connected between the positive output end and the negative output end of the first switching power supply, and the second power supply indicator is connected between the positive output end and the negative output end of the second switching power supply.

[0012] Further, the signal two-take-one sub-module includes a switch element SA1, a switch element SA2, a relay KM1, and a signal two-take-one sub-module terminal group, wherein

[0013] The signal two-take-one sub-module terminal group includes a first power input terminal, and the power module terminal group includes a first power output terminal;

[0014] The switch element SA1 and the switch element SA2 are connected in parallel, a first end of the switch element SA1 is connected with the first power input terminal, a second end of the switch element SA1 is connected with the first power input terminal through a coil of the relay KM1, the first power input terminal is connected with the first power output terminal, and the first power output terminal is connected with a power supply bus.

[0015] Further, the signal two-take-one sub-module terminal group includes a first protection signal output terminal;

[0016] The input signal group includes an input signal INA1 and an input signal INA2, and the output signal group includes a first protection signal;

[0017] The switch element SA1 is controlled by the input signal INA1, the switch element SA2 is controlled by the input signal INA2, a normally open contact of the relay KM1 is connected in series in a signal two-take-one protection signal output circuit, and an output end of the signal two-take-one protection signal output circuit is connected with the first protection signal output terminal;

[0018] The signal two-take-one protection signal output circuit is configured to output the first protection signal through the first protection signal output terminal when the input signal INA1 and / or the input signal INA2 is a valid signal.

[0019] Further, the signal multi-take-one sub-module includes N switch elements, a relay KM2, and a signal multi-take-one sub-module terminal group, wherein

[0020] The signal multi-take-one sub-module terminal group includes a second power input terminal, and the power module terminal group includes a second power output terminal;

[0021] The N switch elements are connected in parallel, a first end of each of the switch elements is connected with the second power input terminal, a second end of each of the switch elements is connected with the second power input terminal through a coil of the relay KM2, the second power input terminal is connected with the second power output terminal, and the second power output terminal is connected with the power supply bus.

[0022] Further, the signal more-than-one sub-module wiring terminal group comprises a second protection signal output terminal;

[0023] The input signal group comprises N input signals, and the output signal group comprises a second protection signal.

[0024] The N switch elements are controlled one-to-one by the N input signals, the normally open contact of the relay KM2 is connected in series in a signal more-than-one protection signal output circuit, and an output end of the signal more-than-one protection signal output circuit is connected with the second protection signal output terminal.

[0025] The signal more-than-one protection signal output circuit is used for outputting the second protection signal through the second protection signal output terminal when any input signal in the N input signals is a valid signal.

[0026] Further, the signal three-of-two sub-module comprises a switch element SC1, a switch element SC2, a switch element SC3, a switch element SC4, a switch element SC5, a switch element SC6, a relay KM3, and a signal three-of-two sub-module wiring terminal group, wherein,

[0027] The signal three-of-two sub-module wiring terminal group comprises a third power input terminal, and the power module wiring terminal group comprises a third power output terminal.

[0028] The second end of the switch element SC1 is connected with the first end of the switch element SC2, the second end of the switch element SC3 is connected with the first end of the switch element SC4, and the second end of the switch element SC5 is connected with the first end of the switch element SC6.

[0029] The first ends of the switch element SC1, the switch element SC3, and the switch element SC5 are connected with the third power input terminal, the second ends of the switch element SC2, the switch element SC4, and the switch element SC6 are connected with the third power input terminal through the coil of the relay KM3, the third power input terminal is connected with the third power output terminal, and the third power output terminal is connected with a power supply bus.

[0030] Further, the signal three-of-two sub-module wiring terminal group comprises a third protection signal output terminal, and the input signal group comprises an input signal INC1, an input signal INC2, and an input signal INC3.

[0031] The switch element SC1 is controlled by the input signal INC1, and the switch element SC2 is controlled by the input signal INC2.

[0032] The switch element SC3 is controlled by the input signal INC1, and the switch element SC4 is controlled by the input signal INC3.

[0033] The switching element SC5 is controlled by an input signal INC3, and the switching element SC6 is controlled by an input signal INC2.

[0034] The normally open contact of the relay KM3 is connected in series in a signal two-out-of-three protection signal output circuit, and an output end of the signal two-out-of-three protection signal output circuit is connected with a third protection signal output terminal.

[0035] Further, the output signal group includes a third protection signal, and the signal two-out-of-three protection signal output circuit is configured to output the third protection signal through the third protection signal output terminal when the input signal INC1 and the input signal INC2 are valid signals, and / or when the input signal INC1 and the input signal INC3 are valid signals, and / or when the input signal INC2 and the input signal INC3 are valid signals.

[0036] The beneficial technical effects of the utility model are as follows:

[0037] (1) The protection module simplifies the control system through modularization, the logic judgment module in the protection module can be installed in any control cabinet, occupies small space, and has simple structure, low cost and convenient installation.

[0038] (2) Different logic judgment submodules can be set according to actual needs, and the flexibility is high, and the maintenance and expansion in the later period are facilitated.

[0039] (3) The power module is redundantly designed, and the reliability and stability of power supply are improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 is a structural block diagram of one embodiment of the protection module provided by the utility model.

[0041] Figure 2 is a structural schematic view of one embodiment of the battery module provided by the utility model.

[0042] Figure 3 is a structural schematic view of one embodiment of the signal two-out-of-one submodule provided by the utility model.

[0043] Figure 4 is a structural schematic view of one embodiment of the signal multiple-out-of-one submodule provided by the utility model.

[0044] Figure 5 is a structural schematic view of one embodiment of the signal two-out-of-three submodule provided by the utility model.

[0045] Reference numerals: 1 - first switching power supply, 2 - first power supply indicator, 3 - second switching power supply, 4 - second power supply indicator, 5 - power supply bus, 6 - power supply output cable, 7 - power module terminal block, 8 - signal two-take-one submodule terminal block, 9 - signal multi-take-one submodule terminal block, 10 - signal three-take-two submodule terminal block. DETAILED DESCRIPTION

[0046] The specific embodiments of the utility model will be further described below in combination with the drawings. It can be understood that the specific embodiments described herein are only used to explain the related content, and not limited to the disclosure.

[0047] The utility model provides a kind of protection module, including power module and the logic judging module being connected with power module, the power module is used to power supply logic judging module;

[0048] The logic judging module is used to carry out logic judgment to input signal group to output output signal group according to input signal group, and the logic judging module includes several signal two-take-one submodules, several signal three-take-two submodules and / or several signal multi-take-one submodules.

[0049] Specifically, the number of signal two-take-one submodule, signal three-take-two submodule and signal multi-take-one submodule in logic judging module can be set according to actual logic judgment demand, and the control system is simplified by modularization, and the logic judging module can be installed in any control cabinet, with small space occupation, simple structure, low cost and convenient installation. At the same time, by flexibly setting the number of signal two-take-one submodule, signal three-take-two submodule and signal multi-take-one submodule, installation space can be further saved, and maintenance and expansion in later period are facilitated. The specific structure of power module, signal two-take-one submodule, signal three-take-two submodule and signal multi-take-one submodule can refer to the following description.

[0050] Further, the power module includes first switching power supply 1, second switching power supply 3, first power supply indicator 2, second power supply indicator 4, power supply bus 5 and power module terminal block 7, wherein,

[0051] The power module terminal group 7 includes a first power input terminal and a second power input terminal; the input end of the first switching power supply 1 is connected with the power supply through the first power input terminal, and the input end of the second switching power supply 3 is connected with the power supply through the second power input terminal; the positive output end and the negative output end of the first switching power supply 1 are connected with the power supply bus 5, and the positive output end and the negative output end of the second switching power supply 3 are connected with the power supply bus 5. The first power indicator 2 is connected between the positive output end and the negative output end of the first switching power supply 1, and the second power indicator 4 is connected between the positive output end and the negative output end of the second switching power supply 3.

[0052] Specifically, as shown in the figure, Figure 2 the power module adopts a redundant design, when one of the first switching power supply 1 and the second switching power supply 3 fails, the other switching power supply can still ensure continuous power supply. The first power indicator 2 is used to indicate the operating state of the first switching power supply 1, and the second power indicator 4 is used to indicate the operating state of the second switching power supply 3. The power module terminal group 7 is provided with the same number of power output terminals as the total number of signal two-take-one sub-modules, signal three-take-two sub-modules and signal multi-take-one sub-modules, and the power output terminals are connected with the power supply bus 5 to supply power to each sub-module through the corresponding power output terminals. The capacity of the first switching power supply 1 and the second switching power supply 3 can be determined according to the total number of signal two-take-one sub-modules, signal three-take-two sub-modules and signal multi-take-one sub-modules, and the specific form of the power indicator can be consistent with the prior art.

[0053] Further, as shown in the figure, Figure 3 the signal two-take-one sub-module includes a switching element SA1, a switching element SA2, a relay KM1, and a signal two-take-one sub-module terminal group 8, wherein,

[0054] The signal two-take-one sub-module terminal group includes a first power input terminal and a first protection signal output terminal, and the power module terminal group further includes a first power output terminal;

[0055] The switching element SA1 and the switching element SA2 are connected in parallel, the first end of the switching element SA1 is connected with the first power input terminal, the second end of the switching element SA1 is connected with the first power input terminal through the coil of the relay KM1, the first power input terminal is connected with the first power output terminal, and the first power output terminal is connected with the power supply bus 5.

[0056] The input signal group includes input signal INA1 and input signal INA2, and the output signal group includes a first protection signal. The switching element SA1 is controlled by input signal INA1, and the switching element SA2 is controlled by input signal INA2. The normally open contact of the relay KM1 is connected in series in the two-out-of-one protection signal output circuit. The output terminal of the two-out-of-one protection signal output circuit is connected to the first protection signal output terminal. The two-out-of-one protection signal output circuit is used to output a first protection signal through the first protection signal output terminal when input signal INA1 and / or input signal INA2 are valid signals.

[0057] Specifically, the power supply bus 5 includes a positive bus and a negative bus, and the first power input terminal includes a first power positive input terminal and a first power negative input terminal. The positive output terminal of the first switching power supply 1 and the positive output terminal of the second switching power supply 3 are connected to the positive bus, and the negative output terminals of the second switching power supply 1 and the second switching power supply 3 are connected to the negative bus. The first end of the switching element SA1 is connected to the first power positive input terminal, and the second end of the switching element SA1 is connected to the first power negative input terminal through the coil of the relay KM1. The first power output terminal includes a first power positive output terminal and a first power negative output terminal. The first power positive input terminal is connected to the positive bus through the first power positive output terminal and the power output cable 6; the first power negative input terminal is connected to the negative bus through the first power negative output terminal and the power output cable 6.

[0058] When input signal INA1 and / or input signal INA2 are valid, switching element SA1 and / or switching element SA2 are closed, relay KM1 coil is energized, normally open contact of relay KM1 is closed, and the two-out-of-one protection signal output circuit outputs the first protection signal through the first protection signal output terminal.

[0059] Furthermore, such as Figure 4 As shown, the signal multiple-choice submodule includes N switching elements ( Figure 4 The components are respectively represented by SB1, SB2, ..., SBN), relay KM2, and signal multiple-selection submodule terminal block 9, among which,

[0060] The signal multiple-choice submodule terminal block 9 includes a second power input terminal and a second protection signal output terminal, and the power module terminal block 7 includes a second power output terminal.

[0061] The N switch elements are connected in parallel, and the first ends of all the switch elements are connected with a second power input terminal, the second ends of all the switch elements are connected with the second power input terminal through a coil of a relay KM2, the second power input terminal is connected with a second power output terminal, and the second power output terminal is connected with a power bus 5.

[0062] The input signal group includes N input signals, and the output signal group includes a second protection signal. The N switch elements are controlled one-to-one by the N input signals, the normally open contact of the relay KM2 is connected in series in a signal more-than-one protection signal output loop, and an output end of the signal more-than-one protection signal output loop is connected with a second protection signal output terminal; the signal more-than-one protection signal output loop is used to output the second protection signal through the second protection signal output terminal when any input signal in the N input signals is a valid signal.

[0063] Specifically, N is a positive integer, and N can be set according to the actual input needs of the input signal. The second power input terminal includes a second power positive input terminal and a second power negative input terminal, the first ends of the N switches are connected with the second power positive input terminal, and the second ends of the N switches are connected with the second power negative input terminal through the coil of the relay KM2. The second power output terminal includes a second power positive output terminal and a second power negative output terminal, the second power positive input terminal is connected with a positive bus through the second power positive output terminal and a power output cable 6; and the second power negative input terminal is connected with a negative bus through the second power negative output terminal and the power output cable 6.

[0064] When any input signal in the N input signals is a valid signal, the corresponding switch element is controlled to be closed, the coil of the relay KM2 is powered, the normally open contact of the relay KM2 is closed, and the signal more-than-one protection signal output loop outputs the second protection signal through the second protection signal output terminal.

[0065] Further, as shown in the figure, Figure 5 The signal three-of-two sub-module includes a switch element SC1, a switch element SC2, a switch element SC3, a switch element SC4, a switch element SC5, a switch element SC6, a relay KM3, and a signal three-of-two sub-module terminal group 10, wherein,

[0066] The signal three-of-two sub-module terminal group 10 includes a third power input terminal and a third protection signal output terminal, and the power module terminal group includes a third power output terminal;

[0067] The second end of the switching element SC1 is connected with the first end of the switching element SC2, the second end of the switching element SC3 is connected with the first end of the switching element SC4, and the second end of the switching element SC5 is connected with the first end of the switching element SC6.

[0068] The first end of the switching element SC1, the switching element SC3 and the switching element SC5 is connected with a third power input terminal, the second end of the switching element SC2, the switching element SC4 and the switching element SC6 is connected with the third power input terminal through the coil of the relay KM3, the third power input terminal is connected with a third power output terminal, and the third power output terminal is connected with the power bus 5.

[0069] Specifically, the third power input terminal includes a third power positive input terminal and a third power negative input terminal, the first end of the switching element SC1, the switching element SC3 and the switching element SC5 is connected with the third power positive input terminal, and the second end of the switching element SC2, the switching element SC4 and the switching element SC6 is connected with the third power negative input terminal through the coil of the relay KM3. The third power output terminal includes a third power positive output terminal and a third power negative output terminal, the third power positive input terminal is connected with the positive bus through the third power positive output terminal and the power output cable 6, and the third power negative input terminal is connected with the negative bus through the third power negative output terminal and the power output cable 6.

[0070] The input signal group includes the input signal INC1, the input signal INC2 and the input signal INC3, and the output signal group includes a third protection signal. The switching element SC1 is controlled by the input signal INC1, the switching element SC2 is controlled by the input signal INC2, the switching element SC3 is controlled by the input signal INC1, the switching element SC4 is controlled by the input signal INC3, the switching element SC5 is controlled by the input signal INC3, and the switching element SC6 is controlled by the input signal INC2. The normally open contact of the relay KM3 is connected in series in a signal three-out-of-two protection signal output loop, and the output end of the signal three-out-of-two protection signal output loop is connected with a third protection signal output terminal.

[0071] The signal two-out-of-three protection signal output circuit is configured to, when the input signal INC1 and the input signal INC2 are valid signals, and / or the input signal INC1 and the input signal INC3 are valid signals, and / or the input signal INC2 and the input signal INC3 are valid signals, close the switch element SC1 and the switch element SC2, and / or close the switch element SC3 and the switch element SC4, and / or close the switch element SC5 and the switch element SC6, energize the coil of the relay KM3, close the normally open contact of the relay KM3, and output a third protection signal through the third protection signal output terminal. It should be noted that the above-mentioned switch elements can all be power devices with switching capability.

[0072] In the description of the present specification, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Those skilled in the art should understand that the above-mentioned is only the preferred embodiment of the present application, and the present application is not limited to the above-mentioned embodiments. It can be understood that other improvements and changes directly derived or thought by those skilled in the art without departing from the spirit and concept of the present application should be considered to be included in the protection scope of the present application.

Claims

1. A protection module, characterized in that, The power module is used for powering the logic judging module; The logic judging module is used for performing logic judgment on the input signal group to output an output signal group according to the input signal group, and the logic judging module comprises a plurality of signal two-out-of-one sub-modules, a plurality of signal three-out-of-two sub-modules and / or a plurality of signal multi-out-of-one sub-modules.

2. The protection module of claim 1, wherein, The power module comprises a first switching power supply, a second switching power supply, a first power supply indicator, a second power supply indicator, a power supply bus and a power module terminal set, wherein The power module terminal set comprises a first power supply input terminal and a second power supply input terminal; The input end of the first switching power supply is connected with the power supply through the first power supply input terminal, and the input end of the second switching power supply is connected with the power supply through the second power supply input terminal; The positive output end and the negative output end of the first switching power supply are connected with the power supply bus, and the positive output end and the negative output end of the second switching power supply are connected with the power supply bus.

3. The protection module of claim 2, wherein, The first power supply indicator is connected between the positive output end and the negative output end of the first switching power supply, and the second power supply indicator is connected between the positive output end and the negative output end of the second switching power supply.

4. The protection module of claim 2, wherein, The signal two-out-of-one sub-module comprises a switching element SA1, a switching element SA2, a relay KM1 and a signal two-out-of-one sub-module terminal set, wherein The signal two-out-of-one sub-module terminal set comprises a first power supply input terminal, and the power module terminal set comprises a first power supply output terminal; The switching element SA1 and the switching element SA2 are connected in parallel, the first end of the switching element SA1 is connected with the first power supply input terminal, the second end of the switching element SA1 is connected with the first power supply input terminal through the coil of the relay KM1, the first power supply input terminal is connected with the first power supply output terminal, and the first power supply output terminal is connected with the power supply bus.

5. The protection module of claim 4, wherein, The signal two-out-of-one sub-module terminal set comprises a first protection signal output terminal; The input signal group comprises an input signal INA1 and an input signal INA2, and the output signal group comprises a first protection signal; The switching element SA1 is controlled by the input signal INA1, the switching element SA2 is controlled by the input signal INA2, the normally open contact of the relay KM1 is connected in series in a signal two-out-of-one protection signal output circuit, and the output end of the signal two-out-of-one protection signal output circuit is connected with the first protection signal output terminal; The signal two-out-of-one protection signal output circuit is used for outputting the first protection signal through the first protection signal output terminal when the input signal INA1 and / or the input signal INA2 is a valid signal.

6. The protection module of claim 2, wherein, The signal multi-out-of-one sub-module comprises N switching elements, a relay KM2 and a signal multi-out-of-one sub-module terminal set, wherein The signal multi-out-of-one sub-module terminal set comprises a second power supply input terminal, and the power module terminal set comprises a second power supply output terminal; The N switch elements are connected in parallel, the first ends of all the switch elements are connected with a second power input terminal, the second ends of all the switch elements are connected with the second power input terminal through a coil of a relay KM2, the second power input terminal is connected with a second power output terminal, and the second power output terminal is connected with a power supply bus.

7. The protection module of claim 6, wherein, The signal more-than-one sub-module terminal set comprises a second protection signal output terminal; The input signal group comprises N input signals, and the output signal group comprises a second protection signal; The N switch elements are controlled one by one by the N input signals, the normally open contact of the relay KM2 is connected in series in a signal more-than-one protection signal output loop, and an output end of the signal more-than-one protection signal output loop is connected with the second protection signal output terminal. The signal more-than-one protection signal output loop is used for outputting the second protection signal through the second protection signal output terminal when any input signal of the N input signals is a valid signal.

8. The protection module of claim 2, wherein, The signal three-of-two sub-module comprises a switch element SC1, a switch element SC2, a switch element SC3, a switch element SC4, a switch element SC5, a switch element SC6, a relay KM3, and a signal three-of-two sub-module terminal set. The signal three-of-two sub-module terminal set comprises a third power input terminal, and the power module terminal set comprises a third power output terminal. The second end of the switch element SC1 is connected with the first end of the switch element SC2, the second end of the switch element SC3 is connected with the first end of the switch element SC4, and the second end of the switch element SC5 is connected with the first end of the switch element SC6. The first ends of the switch element SC1, the switch element SC3, and the switch element SC5 are connected with the third power input terminal, the second ends of the switch element SC2, the switch element SC4, and the switch element SC6 are connected with the third power input terminal through the coil of the relay KM3, the third power input terminal is connected with the third power output terminal, and the third power output terminal is connected with the power supply bus.

9. The protection module of claim 8, wherein, The signal three-of-two sub-module terminal set comprises a third protection signal output terminal. The input signal group comprises an input signal INC1, an input signal INC2, and an input signal INC3. The switch element SC1 is controlled by the input signal INC1, and the switch element SC2 is controlled by the input signal INC2. The switch element SC3 is controlled by the input signal INC1, and the switch element SC4 is controlled by the input signal INC3. The switch element SC5 is controlled by the input signal INC3, and the switch element SC6 is controlled by the input signal INC2. The normally open contact of the relay KM3 is connected in series in a signal three-of-two protection signal output loop, and an output end of the signal three-of-two protection signal output loop is connected with the third protection signal output terminal.

10. The protection module of claim 9, wherein, The output signal group comprises a third protection signal, the signal three out of two protection signal output circuit being designed to output the third protection signal via a third protection signal output terminal if the input signal INC1 and the input signal INC2 are active signals and / or if the input signal INC1 and the input signal INC3 are active signals and / or if the input signal INC2 and the input signal INC3 are active signals.

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