CN220342305U - Transistor-based thermal switching value signal three-out-two redundancy voting module - Google Patents
Transistor-based thermal switching value signal three-out-two redundancy voting module Download PDFInfo
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- CN220342305U CN220342305U CN202322050099.3U CN202322050099U CN220342305U CN 220342305 U CN220342305 U CN 220342305U CN 202322050099 U CN202322050099 U CN 202322050099U CN 220342305 U CN220342305 U CN 220342305U
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Abstract
The utility model discloses a thermal switching value signal three-out-two redundancy voting module based on a transistor, which belongs to the technical field of industrial control and comprises the following components: an internal package voting circuit consisting of 9 diodes, 7 resistors, 1 optocoupler and 1 NPN transistor; one end of a resistor R1, a resistor R2 and a resistor R3 in the internal packaging voting circuit are all connected with the positive electrode of the power supply; the other end 3 branches of the resistor R1 are respectively connected with one end of the switch A, one end of the switch B and one end of the resistor R4 through 3 forward diodes D1. The transistor-based thermal switching value signal three-out-of-two redundancy voting module not only solves the problems of external wiring and multiple fault points of a three-out-of-two redundancy voting mode of a relay, but also effectively overcomes the defects of high investment and low reliability of a software three-out-of-two redundancy voting mode.
Description
Technical Field
The utility model relates to the technical field of industrial control, in particular to a transistor-based thermal switching value signal three-out-of-two redundancy voting module.
Background
The logic composed of three switching values reflecting the same event is mentioned in the industry standard DL/T5428-2009 "technical provision for designing thermal protection System of thermal Power plant", wherein the logic output is "true" when any two values are "true".
In power production and other industrial thermal control protection, because certain detection switching value signals require very high reliability, three-out-of-two redundancy fault-tolerant voting is needed, the reliability of key signal detection is improved, and the safety requirement of system operation is met.
The method comprises the steps of writing a corresponding program through software, realizing three-out-of-two logic voting operation, outputting an operation result to control a relay of an external loop to act, increasing software cost and programming investment, tightly coupling the software and hardware, and reducing system reliability; the other is realized by using the relay of the control loop, the principle is that three relays are adopted, each relay is at least provided with 2 groups of contacts, and any two relays are connected in parallel after being connected in series two by two to form a three-out-two voting loop, but the defects are obvious, the mechanical contacts of the relays are easy to oxidize, faults such as adhesion and clamping of the contacts of the relays occur, and more fault points are multiple and hidden due to complicated external wiring, so that the maintenance cost and the cost are high.
Disclosure of Invention
The utility model mainly aims to provide a transistor-based thermal switching value signal three-out-of-two redundancy voting module, which aims to solve the problems that the external wiring and the fault points of the existing relay three-out-of-two redundancy voting mode are more, and the software three-out-of-two redundancy voting mode has high investment and low reliability.
In order to solve the technical problems, according to one aspect of the present utility model, the following technical solutions are provided:
a transistor-based thermal switching value signal two-out-of-three redundancy voting module comprising: an internal package voting circuit consisting of 9 diodes, 7 resistors, 1 optocoupler and 1 NPN transistor;
one end of a resistor R1, a resistor R2 and a resistor R3 in the internal packaging voting circuit are all connected with the positive electrode of the power supply;
the other end 3 branches of the resistor R1 are respectively connected with one end of the switch A, one end of the switch B and one end of the resistor R4 through 3 forward diodes D1;
the other end 3 branches of the resistor R2 are respectively connected with the same ends of the switch B, the switch C and the resistor R4 through 3 forward diodes D2;
the other end 3 branches of the resistor R3 are respectively connected with the same ends of the switch C, the switch A and the resistor R4 through 3 forward diodes D3;
the other end of the resistor R4 is connected with the B pole of the transistor, and the C pole of the transistor is connected with the anode of the light-emitting diode of the optical coupler OC;
and 2 pins of the phototriode of the optical coupler OC are connected with PLC input module equipment in the industrial control system.
As a preferable scheme of the transistor-based thermal switching value signal three-out-of-two redundancy voting module, the utility model comprises the following steps: and the resistors R1, R2, R3, R4, R6 and R7 in the internal packaging voting circuit have the same resistance value, and the resistance value is 10KΩ.
As a preferable scheme of the transistor-based thermal switching value signal three-out-of-two redundancy voting module, the utility model comprises the following steps: the resistance R5 takes a resistance value of 1KΩ.
As a preferable scheme of the transistor-based thermal switching value signal three-out-of-two redundancy voting module, the utility model comprises the following steps: the switch A, the switch B and the switch C are used as three independent signal nodes for detecting the switching value, and the other ends of the switch A, the switch B and the switch C are connected with a grounding negative electrode.
As a preferable scheme of the transistor-based thermal switching value signal three-out-of-two redundancy voting module, the utility model comprises the following steps: the LED cathode of the optical coupler OC is connected with the grounding cathode after passing through the pull-down resistor R7, and the 2 pins of the phototriode of the optical coupler OC are used as voting signal switch nodes for circuit output.
As a preferable scheme of the transistor-based thermal switching value signal three-out-of-two redundancy voting module, the utility model comprises the following steps: the C electrode of the transistor is connected with the positive electrode of the power supply after passing through the pull-up resistor R6, and the B electrode of the transistor is connected with the E electrode of the transistor after passing through the pull-down resistor R5 to be grounded.
As a preferable scheme of the transistor-based thermal switching value signal three-out-of-two redundancy voting module, the utility model comprises the following steps: the power supply connected with the resistor R1, the resistor R2 and the resistor R3 is a direct-current 24V power supply, and the power supply connected with the resistor R6 is a direct-current 24V power supply.
As a preferable scheme of the transistor-based thermal switching value signal three-out-of-two redundancy voting module, the utility model comprises the following steps: the inner packaging voting circuit is packaged in a shielding insulating shell, and the shielding insulating shell is sealed by steel materials.
As a preferable scheme of the transistor-based thermal switching value signal three-out-of-two redundancy voting module, the utility model comprises the following steps: the bottom of the shielding insulating shell is provided with a guide rail adapter, and the top of the shielding insulating shell is provided with an led secondary luminous tube.
The voting circuit design of the utility model is composed of semiconductor electronic circuit elements, and comprises 9 diodes, 7 resistors, 1 optocoupler and 1 NPN transistor, and the voting circuit has the advantages of no relay or contact thereof, long service life of the switch and reliable action. The circuit adopts a thermal control system 24V to control voltage, and the voltage is reduced through a resistor to supply power for the logic circuit element, so that an additional logic circuit power supply is not needed. And the three paths of independent switching value signal input and logic voting parts of the voting circuit are isolated from the output nodes through the optical coupler, so that the function of preventing the signal loop from interfering the thermal control system is achieved. The voting circuit is used for carrying out three-out two-voting treatment on i/o signals needing high-accuracy action in the thermal control protection system, so that the defects of a conventional relay voting mode and a software three-out two-voting mode can be effectively overcome, the equipment cost of the system is reduced, the installation efficiency is improved, and the later maintenance is convenient;
the transistor-based thermal switching value signal three-out-of-two redundancy voting module not only solves the problems of external wiring and multiple fault points of a three-out-of-two redundancy voting mode of a relay, but also effectively overcomes the defects of high investment and low reliability of a software three-out-of-two redundancy voting mode.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a circuit configuration of the present utility model;
FIG. 2 is a schematic diagram of an internal package circuit of the present utility model;
fig. 3 is a schematic view of a module package structure according to the present utility model.
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a transistor-based thermal switching value signal three-out-of-two redundancy voting module, which not only solves the problems of external wiring and more fault points of a three-out-of-two redundancy voting mode of a relay, but also effectively overcomes the defects of high investment and low reliability of a software three-out-of-two redundancy voting mode.
Referring to fig. 1 and 2, the method includes: an internal package voting circuit consisting of 9 diodes, 7 resistors, 1 optocoupler and 1 NPN transistor;
one end of a resistor R1, a resistor R2 and a resistor R3 in the internal packaging voting circuit are all connected with the positive electrode of the power supply;
the other end 3 branches of the resistor R1 are respectively connected with one end of the switch A, one end of the switch B and one end of the resistor R4 through 3 forward diodes D1;
the other end 3 branches of the resistor R2 are respectively connected with the same ends of the switch B, the switch C and the resistor R4 through 3 forward diodes D2;
the other end 3 branches of the resistor R3 are respectively connected with the same ends of the switch C, the switch A and the resistor R4 through 3 forward diodes D3;
the other end of the resistor R4 is connected with the B pole of the transistor, and the C pole of the transistor is connected with the anode of the light-emitting diode of the optical coupler OC;
2 pins of a phototriode of the optical coupler OC are connected with PLC input module equipment in an industrial control system;
the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R6 and the resistor R7 are all used for loop current limiting in a circuit, the resistor R5 is used for providing a conducting voltage for a transistor in the circuit, the switch A, the switch B and the switch C are used for being used as input signal switches, the diode D1, the diode D2 and the diode D3 are respectively used for connecting the R1 with one end of the switch A, the switch B and the resistor R4, the resistor R2 with the same end of the switch B, the switch C and the resistor R4, the resistor R3 with the same end of the switch C, the switch A and the resistor R4, the transistor is used for connecting the other end of the resistor R4, the resistor R5, the resistor R6 and the positive electrode of a light-emitting diode of the light coupler OC, and the light coupler OC is used for connecting the resistor R7 and PLC input module equipment in an industrial control system;
the internal voting circuit is provided with three resistors R1, R2 and R3 with the same resistance value and one end connected with direct-current 24V voltage (positive electrode of a power supply), and 3 branches at the other end of the resistor R1 are respectively connected with one ends of a switch A, a switch B and a resistor R4 through 3 forward diodes D1; the other end 3 branches of the resistor R2 are respectively connected with the same ends of the switch B, the switch C and the resistor R4 through 3 forward diodes D2; the 3 branches of resistance R3 other end are connected with the same end of switch C, switch A and resistance R4 through 3 forward diode D3 respectively, the resistance R4 other end is connected with transistor B utmost point, the transistor B utmost point in the voting circuit still is grounded together with transistor E utmost point (power negative pole) after 1 pull-down resistance R5, and the transistor C utmost point is connected direct current 24V voltage (power positive pole) after 1 pull-up resistance R6, and the emitting diode positive pole of optocoupler OC is connected simultaneously to transistor C utmost point.
The LED cathode of the optocoupler OC in the internal packaging voting circuit is grounded (power supply cathode) after passing through 1 pull-down resistor R7, and 2 pins of the phototriode of the optocoupler OC are used as voting signal switch nodes for circuit output and finally connected into PLC input module equipment in an industrial control system; the switch A, B, C in the voting circuit is input as three independent signal nodes for detecting the switching value, and the other end of the switch is simultaneously grounded (the negative electrode of the power supply) as a common end;
resistors R1, R2, R3, R4, R6, R7 in the internal package voting circuit are used for loop current limiting in the circuit, and pull-down resistor R5 is used to provide on-voltage to the transistors in the circuit. The on-off state of the three input switching value signal switches A, B and C determine the voltage at the node S. When there is a voltage at the node S, a turn-on voltage will be formed between the B, E poles of the transistor, the transistor is turned on, and at this time, the circuit formed by the led of the optocoupler OC and R7 is shorted by the pole of the transistor C, E, the optocoupler OC is in a non-driving state, and the circuit output node (2 pins of the phototransistor of the optocoupler OC) is in an open state, otherwise, when the circuit output node is in a closed state.
When all the three input signal switches of the switch A, the switch B and the switch C are disconnected, the voltage is arranged at the node S in the circuit, the transistor is conducted, and the output node of the circuit is in a disconnected state;
when the two input signal switches of the switch A, the switch B and the switch C are disconnected and one is closed, a voltage is arranged at a node S in the circuit, the transistor is conducted, and the output node of the circuit is in an off state;
when the three input signal switches of the switch A, the switch B and the switch C are opened and closed, the voltage at the node S in the circuit is 0, the transistor is cut off, and the output node of the circuit is in a closed state;
when all the three input signal switches of the switch A, the switch B and the switch C are closed, the voltage at the node S in the circuit is 0, the transistor is cut off, and the output node of the circuit is in a closed state;
in summary, when the number of the three input signal switches of the switch a, the switch B and the switch C is smaller than two, the voltage is applied to the node S, the B, E poles of the transistors will form a conducting voltage, the transistors are conducted, the light emitting diode of the optocoupler OC and the circuit formed by R7 are shorted by the pole C, E, the optocoupler OC is in a non-driving state, and the output node of the circuit is in an open state;
when the number of closed switches in the three input signal switches of the switch A, the switch B and the switch C is greater than or equal to two, the voltage at the node S is 0, no on voltage exists between B, E poles of the transistor, the transistor is cut off, the light emitting diode of the optical coupler OC is electrically driven, and the output node of the circuit is in a closed state;
the series-parallel circuit formed by the resistor, the diode, the transistor, the optocoupler and the switch enables the transistor to be switched on and off when different numbers of switches are switched on; the current on-off of the light emitting diode of the optical coupler is realized through the on-off of the transistor, so that the on-off of the phototriode of the optical coupler, namely the output node of the voting circuit, is realized, and the redundant voting function of three paths of independent switching value signals is realized.
Referring to fig. 1 and 2 again, the resistors R1, R2, R3, R4, R6, R7 in the internal package voting circuit have the same resistance, and the resistance is 10kΩ.
Referring to fig. 1 and 2 again, the resistance R5 takes a value of 1kΩ.
Referring to fig. 1 and 2 again, the switches a, B and C are input as three independent signal nodes for detecting the switching value, and the other ends of the switches a, B and C are connected to the ground negative electrode.
Referring to fig. 1 and 2 again, the negative electrode of the light emitting diode of the optocoupler OC is connected to the ground negative electrode through the pull-down resistor R7, and the 2 pins of the phototransistor of the optocoupler OC are used as voting signal switching nodes for circuit output.
Referring to fig. 1 and 2 again, the C pole of the transistor is connected to the positive pole of the power supply after passing through the pull-up resistor R6, and the B pole of the transistor is connected to the ground negative pole after passing through the pull-down resistor R5.
Referring to fig. 1 and 2 again, the power source connected to the resistor R1, the resistor R2 and the resistor R3 is a dc 24V power source, and the power source connected to the resistor R6 is a dc 24V power source.
Referring to fig. 3, the internal packaging voting circuit is packaged in a shielding insulating shell, and the shielding insulating shell is sealed by steel materials;
the bottom of the shielding insulating shell is provided with a guide rail adapter, and the top of the shielding insulating shell is provided with an led secondary luminous tube;
the voting circuit is packaged by adopting the shielding insulating shell, the shielding insulating shell is sealed by adopting steel materials, the bottom of the shielding insulating shell is designed by adopting a guide rail adapter, the appearance is small and exquisite, the wiring and the installation are convenient, the practicality is very high, the manufacturing cost is low, besides the novel design control system is simple and convenient to install, the i/o signal three-out two processing parts of the existing system can be replaced and improved, the operation is simple and easy, and the effects of dust prevention and electromagnetic interference prevention are achieved by the paint spraying treatment of the shielding insulating shell.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (9)
1. The transistor-based thermal switching value signal three-out-two redundancy voting module comprises an internal packaging voting circuit which is composed of 9 diodes, 7 resistors, 1 optocoupler and 1 NPN transistor, and is characterized in that one ends of a resistor R1, a resistor R2 and a resistor R3 in the internal packaging voting circuit are connected with a power supply anode;
the other end 3 branches of the resistor R1 are respectively connected with one end of the switch A, one end of the switch B and one end of the resistor R4 through 3 forward diodes D1; the other end 3 branches of the resistor R2 are respectively connected with the same ends of the switch B, the switch C and the resistor R4 through 3 forward diodes D2; the other end 3 branches of the resistor R3 are respectively connected with the same ends of the switch C, the switch A and the resistor R4 through 3 forward diodes D3;
the other end of the resistor R4 is connected with the B pole of the transistor, and the C pole of the transistor is connected with the anode of the light-emitting diode of the optical coupler OC;
and 2 pins of the phototriode of the optical coupler OC are connected with PLC input module equipment in the industrial control system.
2. The transistor-based thermal switching value signal two-out-of-three redundancy voting module of claim 1, wherein: and the resistors R1, R2, R3, R4, R6 and R7 in the internal packaging voting circuit have the same resistance value, and the resistance value is 10KΩ.
3. The transistor-based thermal switching value signal two-out-of-three redundancy voting module of claim 2, wherein: the resistance R5 takes a resistance value of 1KΩ.
4. The transistor-based thermal switching value signal two-out-of-three redundancy voting module of claim 1, wherein: the switch A, the switch B and the switch C are used as three independent signal nodes for detecting the switching value, and the other ends of the switch A, the switch B and the switch C are connected with a grounding negative electrode.
5. The transistor-based thermal switching value signal two-out-of-three redundancy voting module of claim 1, wherein: the LED cathode of the optical coupler OC is connected with the grounding cathode after passing through the pull-down resistor R7, and the 2 pins of the phototriode of the optical coupler OC are used as voting signal switch nodes for circuit output.
6. The transistor-based thermal switching value signal two-out-of-three redundancy voting module of claim 1, wherein: the C electrode of the transistor is connected with the positive electrode of the power supply after passing through the pull-up resistor R6, and the B electrode of the transistor is connected with the E electrode of the transistor after passing through the pull-down resistor R5 to be grounded.
7. The transistor-based thermal switching value signal two-out-of-three redundancy voting module of claim 1, wherein: the power supply connected with the resistor R1, the resistor R2 and the resistor R3 is a direct-current 24V power supply, and the power supply connected with the resistor R6 is a direct-current 24V power supply.
8. The transistor-based thermal switching value signal two-out-of-three redundancy voting module of claim 1, wherein: the inner packaging voting circuit is packaged in a shielding insulating shell, and the shielding insulating shell is sealed by steel materials.
9. The transistor-based thermal switching value signal two-out-of-three redundancy voting module of claim 8, wherein: the bottom of the shielding insulating shell is provided with a guide rail adapter, and the top of the shielding insulating shell is provided with an led secondary luminous tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322050099.3U CN220342305U (en) | 2023-08-01 | 2023-08-01 | Transistor-based thermal switching value signal three-out-two redundancy voting module |
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| CN202322050099.3U CN220342305U (en) | 2023-08-01 | 2023-08-01 | Transistor-based thermal switching value signal three-out-two redundancy voting module |
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