CN109491295B - Control system - Google Patents
Control system Download PDFInfo
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- CN109491295B CN109491295B CN201811480207.8A CN201811480207A CN109491295B CN 109491295 B CN109491295 B CN 109491295B CN 201811480207 A CN201811480207 A CN 201811480207A CN 109491295 B CN109491295 B CN 109491295B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Relay Circuits (AREA)
Abstract
The invention relates to the field of electrical protection of nuclear power stations, and discloses a control system capable of positioning a fault relay, which comprises: the control circuit is respectively connected with the switch module and the peripheral equipment, and comprises a relay for receiving a switch signal output control signal output by the switch module, wherein the control signal is used for realizing switching-on and tripping control of the peripheral equipment; the control circuit includes a fault holding circuit configured as a relay for instructing the control circuit to malfunction when the control circuit is used to implement the closing control of the peripheral device. The problem that the relay of the relay type control board card fails to be positioned is solved.
Description
Technical Field
The invention relates to the field of electrical protection of nuclear power stations, in particular to a control system capable of positioning a fault relay.
Background
The power distribution board of the nuclear power station generally comprises a relay plate, wherein a relay contact point is controlled by the relay plate through the power on and power off of a relay coil, and the traditional relay plate has the problem that a relay fails to be positioned.
Disclosure of Invention
The invention aims to provide a control system capable of positioning a fault relay.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
a control system, comprising:
the control circuit is respectively connected with the switch module and the peripheral equipment, and comprises a relay for receiving a switch signal output by the switch module and outputting a control signal, wherein the control signal is used for realizing switching-on and tripping control of the peripheral equipment;
the control circuit includes a fault holding circuit configured as a relay for indicating the control circuit to malfunction when the control circuit is used to implement the closing control of the peripheral device.
The control system is a relay type control system, and the working principle is as follows: the purpose that the relay contact point controls the peripheral equipment is achieved by controlling the power-on and power-off of the relay coil through the switch module, the control circuit further comprises a fault maintaining circuit, the fault maintaining circuit comprises a fault indicating lamp and is used for indicating a relay which breaks down in the control circuit, and the problem that the relay in a traditional relay type control board card cannot be positioned when the relay breaks down is solved.
In one embodiment, the control circuit comprises a relay K1, and the relay K1 is configured that when the control circuit is used for realizing the closing control of the peripheral device, a coil of the relay K1 is in an electrified state; the fault holding circuit is connected with a fault switch in the switch module and comprises a normally closed contact of the relay K1, a relay K2 and a fault indicating circuit, the fault switch, the normally closed contact of the relay K1 and a coil of the relay K2 are connected between the positive electrode and the negative electrode of a power supply in series, the normally closed contact of the relay K1 is connected with a normally open contact of the relay K2 in parallel, and the coil of the relay K2 is connected with the fault indicating circuit in parallel.
In one embodiment, the control circuit comprises:
the switching-on control circuit is respectively connected with a switching-on switch in the switch module and a switching-on coil in peripheral equipment and comprises a relay K3, a coil of the relay K3 and the switching-on switch are connected between the positive electrode and the negative electrode of the power supply in series, the first end of the coil of the relay K1 is connected with the positive electrode of the power supply, the second end of the coil of the relay K1 is respectively connected with the first end of the switching-on coil and the negative electrode of the power supply, the second end of the switching-on coil is connected with the positive electrode of the power supply through a normally open contact of the relay K3, and the switching-on control circuit is used for realizing the switching-on control of the peripheral;
the tripping control circuit is respectively connected with a normally open contact of a tripping protection relay in the switch module and a tripping coil in peripheral equipment and comprises a relay K4, a coil of the relay K4 is connected with the normally open contact of the tripping protection relay in series between the positive electrode and the negative electrode of a power supply, the normally open contact of the relay K4 is connected with the tripping coil in series between the positive electrode and the negative electrode of the power supply, and the tripping control circuit is used for realizing tripping control of the peripheral equipment.
In one embodiment, the trip control circuit further comprises:
the relay K5, the coil of relay K5 with trip switch in the switch module is in series connection between the positive negative pole of power, the normally open contact of relay K5 with the normally open contact of relay K4 is parallelly connected and is formed first parallel circuit, first parallel circuit with trip coil series connection is in between the positive negative pole of power.
In one embodiment, the control circuit further comprises:
the locking control circuit is connected with a fault switch in the switch module and comprises a relay K6, a normally open contact of the relay K6 is connected with a coil of the relay K6 in series between the positive electrode and the negative electrode of a power supply, a coil of the relay K6 is connected with a coil of the relay K4 in parallel, and a normally closed contact of the relay K6 is connected with a coil of the relay K1 in series.
In one embodiment, the relay K3 includes a normally open contact K31, a normally open contact K32, a normally open contact K33 and a normally open contact K34, the normally open contact K31 and the normally open contact K32 are connected in series to form a first series circuit, the normally open contact K33 and the normally open contact K34 are connected in series to form a second series circuit, the first series circuit and the second series circuit are connected in parallel to form a second parallel circuit, and the second end of the closing coil is connected with the positive pole of the power supply through the second parallel circuit.
In one embodiment, the method further comprises the following steps:
and the indicating circuit comprises a light emitting diode and a first resistor, the light emitting diode is connected with the first resistor in series to form a third series circuit, and the third series circuit is respectively connected with the relay coil in the control circuit in parallel.
In one embodiment, the method further comprises the following steps:
and the freewheeling circuit comprises a diode and a second resistor, the diode and the second resistor are connected in series to form a fourth series circuit, the fourth series circuit is respectively connected with a relay coil in the control circuit in parallel, and the direction of current flowing through the diode is opposite to the direction of current flowing through the coil.
In one embodiment, the relay further comprises a circuit board, the pins of the relay are fixed with the slots of the circuit board through bolts, and the pins of the relay are inserted columns.
In one embodiment, the relay is packaged on the circuit board through a metal shell, inert gas is filled in the metal shell, and a gold plating layer is arranged at the joint of the metal shell and the circuit board.
Drawings
FIG. 1 is a system block diagram of a control system in one embodiment;
FIG. 2 is a circuit diagram of a fault holding circuit in one embodiment;
FIG. 3 is a circuit diagram of a closing control circuit in an embodiment;
FIG. 4 is a circuit diagram of a trip control circuit in one embodiment;
fig. 5 is a circuit diagram of a trip control circuit in another embodiment;
FIG. 6 is a circuit diagram of a control circuit in one embodiment;
fig. 7 is a circuit diagram of a closing control circuit in another embodiment;
fig. 8 is a circuit diagram of a trip control circuit in another embodiment;
FIG. 9 is a circuit diagram of an indicator circuit in one embodiment;
FIG. 10 is a circuit diagram of a freewheel circuit in an embodiment;
FIG. 11 is a circuit diagram of a control circuit in another embodiment;
FIG. 12 is a circuit diagram of a control system in an embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present invention, "a plurality" means at least one, e.g., one, two, etc., unless specifically limited otherwise.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1, fig. 1 is a system configuration diagram of a control system in an embodiment.
A control system, comprising:
the control circuit 10 is respectively connected with the switch module 20 and the peripheral device 30, and comprises a relay for receiving a switch signal output control signal output by the switch module 20, wherein the control signal is used for realizing switching-on and tripping control of the peripheral device 30;
the control circuit 10 includes a fault holding circuit 100, and the fault holding circuit 100 is configured as a relay for instructing the control circuit 10 to malfunction when the control circuit 10 is used to implement the switching-on control of the peripheral device 30.
The control system is a relay type control system, and the working principle is as follows: the purpose of controlling the peripheral equipment 30 by the relay contact is realized by controlling the power-on and power-off of the relay coil by the switch module 20, and the control circuit 10 further comprises a fault holding circuit 100 for indicating the relay with a fault in the control circuit 10, so that the problem that the relay of the traditional relay type control board card cannot be positioned when the relay fails is solved.
Further, referring to fig. 2, fig. 2 is a circuit diagram of a fault holding circuit in an embodiment, the control circuit 10 includes a relay K1, the relay K1 is configured such that when the control circuit 10 is used to implement closing control of the peripheral device 30, a coil K10 of the relay K1 is in an energized state; the fault holding circuit 100 is connected with a fault switch T1 in the switch module 20, and comprises a normally closed contact K11 of a relay K1, a relay K2 and a fault indication circuit 101, wherein the normally closed contact K11 of the fault switch T1 and the relay K1 and a coil K20 of the relay K2 are connected between the positive electrode and the negative electrode of a 125V direct-current power supply in series, the normally closed contact K11 of a relay K1 and the normally open contact K21 of a relay K2 are connected in parallel, and a coil K20 of the relay K2 and the fault indication circuit 101 are connected in parallel.
When the control circuit 10 is used for realizing switching-on control, the coil K10 of the relay K1 is in a power-on state, that is, when the switching-on control is performed, the normally closed contact K11 of the relay K1 is opened, so that the coil K20 of the relay K2 loses power; when a relay in the control circuit has a fault, a coil K10 of the relay K1 loses power, a normally closed contact K11 of the relay K1 is closed, a coil K20 of the relay K2 gets power, an indicator lamp in the fault indicating circuit 101 connected with a coil K20 of the relay K2 in parallel is turned on, meanwhile, a normally open contact K21 of the relay K2 is closed, specifically, the fault indicating circuit 101 comprises a resistor R1 and a light emitting diode L1, as long as the fault switch T1 is always in a closed state, even if the fault is eliminated, the coil K20 of the relay K2 is always in a power-on state, and the light emitting diode in the fault indicating circuit 101 is always in a light-on state. The operator can judge the relay with fault through the on-off condition of the light emitting diode L1, and after finding the fault, the operator can turn off the fault holding circuit 100 by turning off the fault switch T1, i.e., by turning off the power supply.
Further, the control circuit 10 includes:
referring to fig. 3, fig. 3 is a circuit diagram of a closing control circuit in an embodiment, the closing control circuit 102 is respectively connected to a closing switch T2 in the switch module 20 and a closing coil Q1 in the peripheral device 30, and includes a relay K3, a coil K30 of the relay K3 and a closing switch T2 are connected in series between a positive electrode and a negative electrode of a power supply, a first end of a coil K10 of the relay K1 is connected to the positive electrode of the power supply, a second end of a coil K10 of the relay K1 is respectively connected to a first end of the closing coil Q1 and a negative electrode of the power supply, a second end of the closing coil Q1 is connected to the positive electrode of the power supply through a normally open contact K31 of the relay K3, and the closing control circuit 102 is configured to implement closing control of the peripheral device.
Referring to fig. 4, fig. 4 is a circuit diagram of a trip control circuit in an embodiment, the trip control circuit 103 is respectively connected with a normally open contact T3 of a trip protection relay in the switch module 20 and a trip coil Q2 in the peripheral device 30, and includes a relay K4, a coil K40 of the relay K4 and a normally open contact T3 of the trip protection relay are connected in series between the positive and negative poles of a power supply, a normally open contact K41 of the relay K4 and a trip coil Q2 are connected in series between the positive and negative poles of the power supply, and the trip control circuit 103 is used for realizing trip control of the peripheral device 30.
In the present embodiment, the power supply of the control system mainly includes a 125V dc power supply and a 24V dc power supply.
In the closing control circuit 102, a coil K30 of a relay K3 and a closing switch T2 are connected in series between the positive and negative poles of a 24V dc power supply, a first end of a coil K10 of the relay K1 is connected with the positive pole of a 125V dc power supply, a second end of a coil K10 of a relay K1 is connected with a first end of a closing coil Q1 and the negative pole of the 125V dc power supply respectively, a second end of the closing coil Q1 is connected with the positive pole of the 125V dc power supply through a normally open contact K31 of a relay K3, and the operating principle of the closing control circuit 102 is as follows: when the closing switch T2 is closed, the coil K30 of the relay K3 is energized, the normally open contact K31 of the relay K3 is closed, and the coil K10 of the relay K1 is always in an energized state, so that the closing coil Q1 is energized, and closing control is achieved through the contact of the closing coil Q1.
In the trip control circuit 103, a coil K40 of a relay K4 is connected in series with a normally open contact T3 of a trip protection relay, between the positive and negative poles of a 125V dc power supply, and a normally open contact K41 of a relay K4 and a trip coil Q2 are connected in series between the positive and negative poles of the 125V dc power supply, wherein the coil of the trip protection relay may be connected in series with a power supply or a generator in peripheral equipment, when the voltage at the two ends of the power supply or the generator is not within a threshold range, the coil of the trip protection relay is powered on, the normally open contact T3 of the trip protection relay is closed, the coil K40 of the relay K4 is powered on, the normally open contact K41 of the relay K4 is closed, and the trip coil Q2 is powered on, so that trip protection is realized through the contact of.
Further, the trip control circuit 103 further includes:
referring to fig. 5, fig. 5 is a circuit diagram of a trip control circuit in another embodiment, a relay K5, a coil K50 of a relay K5 and a trip switch T4 in a switch module 20 are connected in series between the positive and negative poles of a power supply, a normally open contact K51 of the relay K5 and a normally open contact K41 of a relay K4 are connected in parallel to form a first parallel circuit, and the first parallel circuit and the trip coil Q2 are connected in series between the positive and negative poles of the power supply.
Specifically, a coil K50 of the relay K5 and a trip switch T4 in the switch module 20 are connected in series between the positive and negative poles of the 24V dc power supply, and the first parallel circuit and the trip coil Q2 are connected in series between the positive and negative poles of the 125V dc power supply, and the operating principle is as follows: no matter the operator presses the trip switch T4 or the trip protection relay acts, the trip coil Q2 is energized, so that the corresponding trip function is realized through the contact of the trip relay.
Further, referring to fig. 6, fig. 6 is a circuit diagram of a control circuit in an embodiment, and the control circuit 10 further includes:
the locking control circuit is connected with a fault switch T1 in the switch module 20 and comprises a relay K6, the fault switch T1, a normally open contact K61 of the relay K6 and a coil K60 of the relay K6 are connected between the positive electrode and the negative electrode of a power supply in series, the coil K60 of the relay K6 and the coil K40 of the relay K4 are connected in parallel, and the normally closed contact K62 of the relay K6 and the coil K10 of the relay K1 are connected in series.
Wherein, shutting control circuit includes relay K6, and closing control circuit includes relay K6's normally closed contact K62, and tripping control circuit includes relay K6's coil K60 and relay K6's normally open contact K61, and shutting control circuit is used for shutting tripping control circuit 103, and its theory of operation is: when the normally open contact T3 of the tripping protection relay is closed, a coil K40 of the relay K4 and a coil K60 of the relay K6 are electrified, a normally open contact K41 of the relay K4 and a normally open contact K61 of the relay K6 are closed, and a tripping coil Q2 is electrified, even if the normally open contact K41 of the relay K4 fails and is not closed, because the normally open contact K61 of the relay K6 is closed, the tripping coil Q2 is always in an electrified state, the contact of the tripping coil Q2 is connected with an alarm circuit and used for reminding an operator that the system is in a tripping state, and after the operator finds tripping, the tripping control of locking and tripping can be released by opening the fault switch T1.
Specifically, referring to fig. 7, fig. 7 is a circuit diagram of a closing control circuit in another embodiment, the relay K3 includes a normally open contact K31, a normally open contact K32, a normally open contact K33 and a normally open contact K34, the normally open contact K31 and the normally open contact K32 are connected in series to form a first series circuit, the normally open contact K33 and the normally open contact K34 are connected in series to form a second series circuit, the first series circuit and the second series circuit are connected in parallel to form a second parallel circuit, and a second end of the closing coil Q1 is connected to an anode of the power supply through the second parallel circuit.
Wherein, closing a floodgate coil Q1's second end is passed through second parallel circuit and is linked to each other with 125V DC power supply's positive pole, and the parallel circuit of second includes four normally open contacts of relay K3, improves the reliability of closing a floodgate control, avoids only adopting a normally open contact, breaks down when this normally open contact and leads to closing a floodgate coil mistake to receive the circumstances of electricity.
Specifically, referring to fig. 8, fig. 8 is a circuit diagram of a trip control circuit in another embodiment, the relay K4 includes a normally open contact K41, a normally open contact K42, a normally open contact K43 and a normally open contact K44, the relay K5 includes a normally open contact K51, a normally open contact K52, a normally open contact K53 and a normally open contact K54, the normally open contact K41 and the normally open contact K42, the normally open contact K43 and the normally open contact K43, the normally open contact K51 and the normally open contact K52, the normally open contact K53 and the normally open contact K54 are respectively connected in series and then connected in parallel, thereby improving reliability of trip control.
Further, referring to fig. 9, fig. 9 is a circuit diagram of an indicating circuit in an embodiment, fig. 9 only shows the circuit diagrams of the indicating circuit respectively connected in parallel with the relay K1 and the relay K5, and further includes:
and the indicating circuit comprises a light emitting diode and a first resistor, the light emitting diode is connected with the first resistor in series to form a third series circuit, and the third series circuit is respectively connected with the relay coils in the control circuit in parallel.
The relay K3 and the relay K5 are connected to a 24V direct-current power supply, and the relay K1, the relay K2, the relay K4 and the relay K6 are connected to a 125V direct-current power supply, so that the resistance value of a first resistor connected with a coil K30 of the relay K3 and a coil K50 of the relay K5 in parallel is 2K omega, and the rated power is 2W; the resistance value of the first resistor connected with the relay K1, the relay K2, the relay K4 and the relay K6 in parallel is 10K omega, and the rated power is 3W. The light emitting diode is connected with the first resistor in series to form a third series circuit, the third series circuit is respectively connected with the relay coil in the control circuit in parallel, when the power supply enables the relay to be electrified through the relay coil, the indicating loop can also have current to pass through, and the light emitting diode is lightened.
Further, referring to fig. 10, fig. 10 is a circuit diagram of a freewheel circuit in an embodiment, fig. 10 only shows the circuit diagrams of the freewheel circuit connected in parallel with the relay K1 and the relay K5, respectively, and further includes:
and the freewheeling circuit comprises a diode and a second resistor, the diode and the second resistor are connected in series to form a fourth series circuit, the fourth series circuit is respectively connected with the relay coil in the control circuit in parallel, and the direction of the current flowing through the diode is opposite to the direction of the current flowing through the coil.
Specifically, the type of the diode is IN4148, the resistance value of the second resistor is different according to different power supplies connected with relays K1-K6, wherein the resistance value of the second resistor connected with relay K1, relay K2, relay K4 and relay K6 IN parallel is 1K omega, and the rated power is 0.25W; the resistance of the second resistor connected in parallel with the coil K30 of the relay K3 and the coil K50 of the relay K5 respectively is 100 Ω, and the rated power is 0.5W. The coil of the relay belongs to an inductive load, overvoltage can be generated at two ends of the coil at the moment of switching off the coil power supply, and the follow current circuit is added to effectively release the overvoltage of the coil and protect the relay power supply.
Referring to fig. 11, fig. 11 is a circuit diagram of a control circuit in another embodiment, the control circuit includes 8 relays K1-K8, each relay includes 4 normally open contacts and 4 normally closed contacts, and a coil of each relay is connected in parallel with an indicating circuit and a freewheeling circuit.
Referring to fig. 12, fig. 12 is a circuit diagram of a control system in an embodiment, including a fault holding circuit, a closing control circuit, a trip control circuit, a lockout control circuit, an indication circuit and a freewheel circuit, the fault holding circuit is connected with a fault switch T1 (corresponding TO 001TO in the figure) in the switch module and comprises a normally closed contact K11 of a relay K1 (corresponding TO 001XK in the figure), a relay K2 (corresponding TO 001XK1 in the figure) and a fault indicating circuit, wherein the normally closed contact K11 of the fault switch T1(001TO) and the relay K1(001XK) and a coil K20 of a relay K2(001XK1) are connected in series between the positive electrode and the negative electrode of a 125V direct-current power supply, the normally closed contact K11 of the relay K1(001XK) is connected in parallel with a normally open contact K21 of a relay K2 (XK 1), the coil K20 of the relay K2(001XK1) is connected in parallel with the fault indicating circuit, and the fault holding circuit is used for positioning a relay which has a fault in closing control; the switching-on control circuit is respectively connected with a switching-on switch T2 (corresponding to CLOSE in the figure) in the switch module and a switching-on coil Q1 in the peripheral equipment and comprises a relay K3 (corresponding to 001XR in the figure), a coil K30 of the relay K3(001XR) and a switching-on switch T2(CLOSE) are connected between the positive pole and the negative pole of a 24V direct-current power supply in series, a first end of a coil K10 of the relay K1(001XK) is connected with the positive pole of a 125V direct-current power supply, a second end of a coil K10 of the relay K1(001XK) is respectively connected with the first end of a switching-on coil Q1 and the negative pole of the 125V direct-current power supply, a second end of a switching-on coil Q1 is connected with the positive pole of the 125V direct-current power supply through a normally-on contact K31 of the relay K3(001 XR); the tripping control circuit is respectively connected with a normally open contact T3(001XI in a corresponding figure) of a tripping protection relay in the switch module and a tripping coil Q2 in peripheral equipment, and comprises a relay K4(011XR in a corresponding figure), a coil K40 of the relay K4(011XR) and a normally open contact T3(001XI) of the tripping protection relay are connected in series between the positive pole and the negative pole of a 125V direct-current power supply, a normally open contact K41 of the relay K4(011XR) and a tripping coil Q2 are connected in series between the positive pole and the negative pole of the 125V direct-current power supply, and the tripping control circuit is used for realizing tripping control of the peripheral equipment 30; and the lockout control circuit is connected with a fault switch T1(001TO) in the switch module and comprises a relay K6 (corresponding TO 003XR in the figure), the fault switch T1(001TO), a normally open contact K61 of the relay K6(003XR) and a coil K60 of the relay K6(003XR) are connected between the positive electrode and the negative electrode of the 125V direct-current power supply in series, a coil K60 of the relay K6(003XR) and a coil K40 of the relay K4 (XR) are connected in parallel, a normally closed contact K62 of the relay K6(003XR) and a coil K10 of the relay K1(001XK) are connected in series, and the lockout control circuit is used for lockout trip control.
Furthermore, still include the circuit board, the pin of relay passes through the bolt fastening with the slot of circuit board, and the pin of relay is for inserting the post. The pins of the relay and the slots of the circuit board are fixed through bolts, meanwhile, the pins of the relay are changed into the inserting columns from original inserting pins, the contact area is increased, and the problem of poor contact between the pins of the relay and the circuit board is solved.
Furthermore, the relay is packaged on the circuit board through a metal shell, inert gas is filled in the metal shell, and a gold plating layer is arranged at the joint of the metal shell and the circuit board. The original relay packaged by plastic is changed into a metal shell, inert gas is filled in the metal shell for packaging, and meanwhile, the surface of a contact is plated with gold, so that the problem of high oxidation speed of a relay contact is solved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A control system, comprising:
the control circuit is respectively connected with the switch module and the peripheral equipment, and comprises a relay for receiving a switch signal output by the switch module and outputting a control signal, wherein the control signal is used for realizing switching-on and tripping control of the peripheral equipment;
the control circuit comprises a fault holding circuit which is configured to be a relay for indicating the control circuit to be in fault when the control circuit is used for realizing the closing control of the peripheral equipment;
the control circuit further comprises a closing control circuit which is respectively connected with a closing switch in the switch module and a closing coil in the peripheral equipment and comprises a relay K3, a coil of the relay K3 is connected with the closing switch in series between a positive pole and a negative pole of a power supply, a first end of a coil of the relay K1 is connected with a positive pole of the power supply, a second end of a coil of the relay K1 is respectively connected with the first end of the closing coil and the negative pole of the power supply, a second end of the closing coil is connected with the positive pole of the power supply through a normally open contact of the relay K3, and the closing control circuit is used for realizing closing control of the peripheral equipment;
the control circuit further comprises a tripping control circuit which is respectively connected with a normally open contact of a tripping protection relay in the switch module and a tripping coil in the peripheral equipment and comprises a relay K4, wherein the coil of the relay K4 is connected with the normally open contact of the tripping protection relay in series between the positive electrode and the negative electrode of the power supply, the normally open contact of the relay K4 is connected with the tripping coil in series between the positive electrode and the negative electrode of the power supply, and the tripping control circuit is used for realizing tripping control of the peripheral equipment.
2. The control system of claim 1,
the control circuit comprises a relay K1, and the relay K1 is configured that when the control circuit is used for realizing the closing control of the peripheral equipment, a coil of the relay K1 is in a power-on state;
the fault holding circuit is connected with a fault switch in the switch module and comprises a normally closed contact of the relay K1, a relay K2 and a fault indicating circuit, the fault switch, the normally closed contact of the relay K1 and a coil of the relay K2 are connected between the positive electrode and the negative electrode of a power supply in series, the normally closed contact of the relay K1 is connected with a normally open contact of the relay K2 in parallel, and the coil of the relay K2 is connected with the fault indicating circuit in parallel.
3. The control system of claim 1, wherein the trip control circuit further comprises:
the relay K5, the coil of relay K5 with trip switch in the switch module is in series connection between the positive negative pole of power, the normally open contact of relay K5 with the normally open contact of relay K4 is parallelly connected and is formed first parallel circuit, first parallel circuit with trip coil series connection is in between the positive negative pole of power.
4. The control system of claim 1, wherein the control circuit further comprises:
the locking control circuit is connected with a fault switch in the switch module and comprises a relay K6, a normally open contact of the relay K6 is connected with a coil of the relay K6 in series between the positive electrode and the negative electrode of a power supply, a coil of the relay K6 is connected with a coil of the relay K4 in parallel, and a normally closed contact of the relay K6 is connected with a coil of the relay K1 in series.
5. The control system according to claim 1, wherein the relay K3 comprises a normally open contact K31, a normally open contact K32, a normally open contact K33 and a normally open contact K34, the normally open contact K31 and the normally open contact K32 are connected in series to form a first series circuit, the normally open contact K33 and the normally open contact K34 are connected in series to form a second series circuit, the first series circuit and the second series circuit are connected in parallel to form a second parallel circuit, and the second end of the closing coil is connected with the positive pole of the power supply through the second parallel circuit.
6. The control system of claim 1, further comprising:
and the indicating circuit comprises a light emitting diode and a first resistor, the light emitting diode is connected with the first resistor in series to form a third series circuit, and the third series circuit is respectively connected with the relay coil in the control circuit in parallel.
7. The control system of claim 1, further comprising:
and the freewheeling circuit comprises a diode and a second resistor, the diode and the second resistor are connected in series to form a fourth series circuit, the fourth series circuit is respectively connected with a relay coil in the control circuit in parallel, and the direction of current flowing through the diode is opposite to the direction of current flowing through the coil.
8. The control system of claim 1, further comprising a circuit board, wherein the pins of the relay are fixed with the slots of the circuit board by bolts, and the pins of the relay are posts.
9. The control system of claim 8, wherein the relay is encapsulated on the circuit board by a metal housing, the metal housing is filled with an inert gas, and a gold plating layer is provided at a junction of the metal housing and the circuit board.
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