CN216161660U - Instantaneous power-off delay time relay - Google Patents
Instantaneous power-off delay time relay Download PDFInfo
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- CN216161660U CN216161660U CN202120633059.XU CN202120633059U CN216161660U CN 216161660 U CN216161660 U CN 216161660U CN 202120633059 U CN202120633059 U CN 202120633059U CN 216161660 U CN216161660 U CN 216161660U
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Abstract
The utility model provides a transient power-off delay time relay which comprises a power supply loop, a delay loop, an energy storage loop and an output loop. The power supply loop is used for supplying power to the delay loop and the energy storage loop after input voltage sequentially passes through resistance-capacitance voltage reduction, rectification and filtering. The delay loop comprises a programmable timing integrated circuit and provides a delay function for the relay. The energy storage loop comprises two high-capacity capacitors and is used for storing electric energy in a power-on state; after power failure, one capacitor supplies power for the delay loop, and the other capacitor supplies power for the work of a reset coil R of the magnetic latching relay; the output circuit comprises a snap relay and a magnetic latching relay. The power supply loop is realized by resistance-capacitance voltage reduction, so that the production cost and the machine weight of the relay are greatly reduced, and the delay loop is formed by a programmable timing integrated circuit, so that the transient power-off delay time relay is high in stability, accurate in delay and capable of realizing long delay time.
Description
Technical Field
The utility model belongs to the field of electronic equipment, and particularly relates to a snap-action power-off delay time relay.
Background
The instant power-off delay time relay (hereinafter referred to as relay) starts to delay after the working voltage of the relay is disconnected, and the working process is as follows: after the relay is electrified, a coil of the internal snap relay is electrified, and the contact state is switched; and a setting coil of the magnetic latching relay is electrified, and the contact state is switched. When a user turns off the relay power supply and then the coil of the internal snap relay is powered off, the contact state is switched; the contact state of the magnetic latching relay is kept unchanged, and meanwhile, the relay begins to delay. After the relay reaches the delay time, the coil of the magnetic latching reset relay is electrified, and the contact state is switched. After the power failure, in order to enable the relay to obtain good time delay, the internal IC must adopt a low-power-consumption integrated circuit, two capacitors are required to perform energy storage work, one capacitor needs to supply power for the integrated circuit after the power failure of the relay, otherwise, the integrated circuit loses electric energy and stops timing work when the timing time is not reached, and the purpose set by a user cannot be achieved. And the other capacitor supplies electric energy for driving the magnetic latching relay to reset after the delay time is reached.
The control part of the instantaneous power-off delay time relay produced by various manufacturers at present mostly adopts domestic special chips, and the chips have low yield, poorer temperature characteristics, low delay precision, poor anti-interference performance and short realized delay time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a snap-action power-off delay time relay which is high in stability, accurate in delay and capable of achieving long delay time.
In order to achieve the purpose, the utility model adopts the technical scheme that:
the utility model provides a snap-action power-off delay time relay, comprising:
the delay loop comprises a programmable timing integrated circuit, a potentiometer, a capacitor and a resistor, provides a delay function for the instantaneous power-off delay time relay, and outputs a high-level trigger signal to the output loop after the delay time is up;
the energy storage loop comprises two high-capacity capacitors and is used for storing electric energy in the state that the instantaneous power-off delay time relay is electrified; when the instantaneous power-off delay time relay is powered off, one capacitor supplies power for the delay loop, and the other capacitor supplies power for the work of a reset coil R of the magnetic latching relay;
the output loop comprises a snap relay and a magnetic latching relay, and the magnetic latching relay is internally provided with a set coil S and a reset coil R; when the instantaneous power-off delay time relay is electrified to work, a coil of the instantaneous relay is electrified, and the contact state is switched; a setting coil S of the magnetic latching relay is electrified, and the contact state is switched; when the instantaneous power-off delay time relay is powered off, the coil of the instantaneous relay is powered off, and the contact state is switched; the contact state of the magnetic latching relay is kept unchanged, when the delay time reaches a set value, a reset coil R of the magnetic latching relay is electrified, and the contact state is switched;
and the power supply loop is used for supplying power to the delay loop and the energy storage loop after the input voltage sequentially passes through resistance-capacitance voltage reduction, rectification and filtering.
A programmable timing integrated circuit IC1, a potentiometer DW1, a resistor R4, a capacitor C5 and a capacitor C6 in the delay loop form a delay time setting circuit, and the delay time required by a user is set by adjusting the potentiometer DW 1; the programmable timing integrated circuit IC1, the potentiometer DW2, the capacitors C4 and C7 form a delay time fine tuning circuit, and the reference value of the delay time is adjusted through the fine tuning potentiometer DW 2; the resistor R3 and the light emitting diode D6 constitute a relay operation indicating circuit, and when the snap-action type power-off delay time relay is energized to operate, the light emitting diode D6 is turned on.
A coil of the snap relay is electrified, the normally open contact is closed, and the normally closed contact is released; the coil of the snap relay is powered off, the normally open contact is released, and the normally closed contact is closed; when two ends of a set coil S of the magnetic latching relay are electrified, a normally open contact of the magnetic latching relay is attracted, and the normally closed contact is released; when the magnetic latching relay is powered off, under the magnetic force action of the permanent magnet, the contact state of the magnetic latching relay is kept unchanged, and the delay loop starts to delay; when the delay time reaches a set value, the two ends of the reset coil R are electrified, the normally open contact of the magnetic latching relay is released, and the normally closed contact is attracted.
The energy storage loop comprises capacitors C8, C9 and C11; when the instantaneous power-off delay time relay is electrified and works, the circuit charges the capacitor C11; the triode T1 is conducted, and the power supply loop charges the capacitors C8 and C9; when the instantaneous power-off delay time relay is powered off, the capacitors C8 and C9 supply power for the delay loop; the resistors R5 and R6 and the triode T1 form a collector-base negative feedback type biasing circuit, the resistor R5 is a collector load resistor, and the resistor R6 is a collector-base negative feedback biasing resistor; the voltage regulator tube D8 regulates the base voltage of the triode T1, and the diode D7 prevents the voltage of the capacitors C8 and C9 from being reversely connected in series into other loops after power failure; diode D10 prevents the voltage of capacitor C11 from back-stringing into other circuits after the relay is de-energized.
The power supply loop performs resistance-capacitance voltage reduction, rectification and filtering on the input 220V alternating current voltage to obtain 24V direct current voltage, and supplies power to the delay loop and the energy storage loop.
Compared with the prior art, the utility model has the beneficial effects that:
the power supply loop of the instant power-off delay time relay is realized by resistance-capacitance voltage reduction, so that the production cost and the machine weight of the relay are greatly reduced, and the delay loop is formed by a programmable timing integrated circuit, so that the relay has high stability and accurate delay and can realize longer delay time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic block diagram of an instantaneous power-off delay time relay according to the present invention;
FIG. 2 is a schematic circuit diagram of a snap-action power-off delay time relay of the present invention;
FIG. 3 is a schematic circuit diagram of a power supply circuit of the instant power-off delay time relay of the present invention;
FIG. 4 is a schematic circuit diagram of the delay circuit, the energy storage circuit and the output circuit of the instant power-off delay time relay of the present invention;
fig. 5 is an appearance schematic diagram of the instantaneous power-off delay time relay of the utility model.
Wherein: 1 is a housing, 2 is a setting unit, and 3 is a display unit.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments.
As shown in fig. 1, the instant type power-off delay time relay (hereinafter referred to as relay) provided by the utility model has a delay control part formed by a programmable timing integrated circuit. This relay includes power supply circuit, time delay return circuit, energy storage circuit, output circuit, wherein:
the power supply loop is used for carrying out resistance-capacitance voltage reduction, rectification and filtering on the input 220V alternating current voltage to obtain 24V direct current voltage which is used for supplying power for the delay loop and the energy storage loop of the relay.
The delay loop mainly comprises a programmable timing integrated circuit, a potentiometer, a capacitor and a resistor, provides a delay function for the relay, and outputs a high-level trigger signal to the output loop after the delay time is reached.
The energy storage loop mainly comprises two large-capacity capacitors and stores electric energy in the state that the relay is electrified. When the relay is powered off, one capacitor supplies power to the delay loop to ensure the normal delay function; when the delay time reaches, a control signal for resetting the relay is output, and at the moment, the other capacitor supplies power for the reset coil R of the magnetic latching relay to work, so that the normal state conversion of the contact of the magnetic latching relay is ensured.
The output circuit mainly comprises a snap relay and a magnetic latching relay. A coil of the snap relay is electrified, the normally open contact is closed, and the normally closed contact is released; the coil of the snap relay is powered off, the normally open contact is released, and the normally closed contact is closed. The magnetic latching relay is provided with a set coil S and a reset coil R inside, and is a latching structure relay capable of keeping a set state or a reset state. When the two ends of the set coil S are electrified, the normally open contact of the magnetic latching relay is attracted, the normally closed contact is released, and at the moment, if the magnetic latching relay is powered off, the contact state of the magnetic latching relay is kept unchanged under the action of the magnetic force of the permanent magnet; when the two ends of the reset coil R are electrified, the normally open contact of the magnetic latching relay is released, and the normally closed contact is attracted.
As shown in fig. 2 and 3, a power supply circuit adopts 220V ac input, and performs resistance-capacitance voltage reduction to 24V ac voltage through resistors R1 and R2 and a capacitor C1, a rectifier bridge B1 rectifies the ac voltage, a capacitor C2 filters the rectified voltage, a voltage regulator tube D1 and a voltage regulator tube D2 stabilize the output dc voltage, and outputs 24V dc voltage after filtering through a capacitor C3, so as to supply power to a delay circuit and an energy storage circuit.
As shown in fig. 2 and 4, the delay circuit is composed of a programmable timing integrated circuit IC1, a resistor R4, capacitors C4 to C7, a potentiometer DW1, and a potentiometer DW 2. The programmable timing integrated circuit IC1, the potentiometer DW1, the resistor R4, the capacitors C5 and C6 form a delay time setting circuit, and the delay time required by a user is set by adjusting the potentiometer DW 1. The programmable timing integrated circuit IC1, the potentiometer DW2, the capacitors C4 and C7 form a delay time fine tuning circuit, and the reference value of the delay time is adjusted through the fine tuning potentiometer DW 2. The resistor R3 and the light emitting diode D6 constitute a relay operation indicating circuit, and when the relay is energized to operate, the light emitting diode D6 is lit.
The energy storage loop is composed of capacitors C8, C9 and C11. When the relay is electrified and works, the circuit charges the capacitor C11; the transistor T1 is turned on, and the power supply loop charges the capacitors C8 and C9. When the relay is powered off, the capacitors C8 and C9 supply power for the time delay loop. The resistors R5 and R6 and the triode T1 form a collector-base negative feedback type biasing circuit, the resistor R5 is a collector load resistor, and the resistor R6 is a collector-base negative feedback biasing resistor. The voltage regulator tube D8 regulates the base voltage of the triode T1, and the diode D7 prevents the voltage of the capacitors C8 and C9 from being reversely connected into other loops after power failure. The diode D10 prevents the voltage of the capacitor C11 from being anti-series connected to other circuits after the relay is de-energized.
The output loop is composed of a resistor R7, diodes D3-D5, D9, D10, a capacitor C10, a triode T2, an instantaneous relay K1A and a magnetic latching relay.
When the relay is electrified to work, the coil of the internal snap relay K1A is electrified, the normally open contact is attracted, and the normally closed contact is released. After the relay is powered off, the coil of the internal snap relay K1A is powered off, the normally open contact is released, and the normally closed contact is attracted. Diode D3 acts to eliminate the self-excited voltage generated by the coil of snap-action relay K1A when the relay is de-energized.
When the relay is electrified to work, the set coil S of the magnetic latching relay is electrified, the normally open contact is attracted, and the normally closed contact is released. After the relay is powered off, the contact state of the magnetic latching relay is kept unchanged under the action of the magnetic force of the permanent magnet, and the delay loop starts to delay. When the delay time reaches a set value, the delay loop outputs a control signal to drive the triode T2 to be conducted, the capacitor C11 supplies power to the reset coil R of the magnetic latching relay, the normally open contact is released, and the normally closed contact is attracted.
The diode D4 is used to eliminate the self-excited voltage generated by the magnetically held relay set coil S when the relay is de-energized. D5 is used to prevent the self-excited voltage generated by the set coil S of the magnetic latching relay from being reversely connected into other loops when the relay is de-energized. The resistor R7 is a current-limiting resistor at the base of the transistor T2. The capacitor C10 acts as a filter. The diode D9 functions to eliminate the self-excited voltage generated by the magnetic latching relay reset coil R. The diode D10 is used to prevent the self-excited voltage of the magnetic latching relay from being connected back to other loops.
As shown in fig. 5, the instantaneous power-off delay time relay of the present invention has a rectangular outer shape, a housing 1 is made of ABS plastic, and a setting unit 2 and a display unit 3 are provided on an end surface of the housing 1. The setting unit 2 adopts a potentiometer knob to set the delay time of the relay, and the display unit 3 adopts a light emitting diode to display the current working state of the relay in real time.
The power supply loop of the instant power-off delay time relay is realized by resistance-capacitance voltage reduction, the production cost and the machine weight of the relay are greatly reduced, and the delay loop is formed by a programmable timing integrated circuit, so that the stability is high, the delay is accurate, and the longer delay time can be realized.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.
Claims (5)
1. A snap-action power-off delay time relay, comprising: the delay loop comprises a programmable timing integrated circuit, a potentiometer, a capacitor and a resistor, provides a delay function for the instantaneous power-off delay time relay, and outputs a high-level trigger signal to the output loop after the delay time is up; the energy storage loop comprises two high-capacity capacitors and is used for storing electric energy in the state that the instantaneous power-off delay time relay is electrified; when the instantaneous power-off delay time relay is powered off, one capacitor supplies power for the delay loop, and the other capacitor supplies power for the work of a reset coil R of the magnetic latching relay; the output loop comprises a snap relay and a magnetic latching relay, and the magnetic latching relay is internally provided with a set coil S and a reset coil R; when the instantaneous power-off delay time relay is electrified to work, a coil of the instantaneous relay is electrified, and the contact state is switched; a setting coil S of the magnetic latching relay is electrified, and the contact state is switched; when the instantaneous power-off delay time relay is powered off, the coil of the instantaneous relay is powered off, and the contact state is switched; the contact state of the magnetic latching relay is kept unchanged, when the delay time reaches a set value, a reset coil R of the magnetic latching relay is electrified, and the contact state is switched; and the power supply loop is used for supplying power to the delay loop and the energy storage loop after the input voltage sequentially passes through resistance-capacitance voltage reduction, rectification and filtering.
2. A snap-action outage delay time relay according to claim 1, characterized in that: a programmable timing integrated circuit IC1, a potentiometer DW1, a resistor R4, a capacitor C5 and a capacitor C6 in the delay loop form a delay time setting circuit, and the delay time required by a user is set by adjusting the potentiometer DW 1; the programmable timing integrated circuit IC1, the potentiometer DW2, the capacitors C4 and C7 form a delay time fine tuning circuit, and the reference value of the delay time is adjusted through the fine tuning potentiometer DW 2; the resistor R3 and the light emitting diode D6 constitute a relay operation indicating circuit, and when the snap-action type power-off delay time relay is energized to operate, the light emitting diode D6 is turned on.
3. A snap-action outage delay time relay according to claim 1, characterized in that: a coil of the snap relay is electrified, the normally open contact is closed, and the normally closed contact is released; the coil of the snap relay is powered off, the normally open contact is released, and the normally closed contact is closed; when two ends of a set coil S of the magnetic latching relay are electrified, a normally open contact of the magnetic latching relay is attracted, and the normally closed contact is released; when the magnetic latching relay is powered off, under the magnetic force action of the permanent magnet, the contact state of the magnetic latching relay is kept unchanged, and the delay loop starts to delay; when the delay time reaches a set value, the two ends of the reset coil R are electrified, the normally open contact of the magnetic latching relay is released, and the normally closed contact is attracted.
4. A snap-action outage delay time relay according to claim 1, characterized in that: the energy storage loop comprises capacitors C8, C9 and C11; when the instantaneous power-off delay time relay is electrified and works, the circuit charges the capacitor C11; the triode T1 is conducted, and the power supply loop charges the capacitors C8 and C9; when the instantaneous power-off delay time relay is powered off, the capacitors C8 and C9 supply power for the delay loop; the resistors R5 and R6 and the triode T1 form a collector-base negative feedback type biasing circuit, the resistor R5 is a collector load resistor, and the resistor R6 is a collector-base negative feedback biasing resistor; the voltage regulator tube D8 regulates the base voltage of the triode T1, and the diode D7 prevents the voltage of the capacitors C8 and C9 from being reversely connected in series into other loops after power failure; diode D10 prevents the voltage of capacitor C11 from back-stringing into other circuits after the relay is de-energized.
5. A snap-action outage delay time relay according to claim 1, characterized in that: the power supply loop performs resistance-capacitance voltage reduction, rectification and filtering on the input 220V alternating current voltage to obtain 24V direct current voltage, and supplies power to the delay loop and the energy storage loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120633059.XU CN216161660U (en) | 2021-03-29 | 2021-03-29 | Instantaneous power-off delay time relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120633059.XU CN216161660U (en) | 2021-03-29 | 2021-03-29 | Instantaneous power-off delay time relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216161660U true CN216161660U (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120633059.XU Active CN216161660U (en) | 2021-03-29 | 2021-03-29 | Instantaneous power-off delay time relay |
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|---|---|
| CN (1) | CN216161660U (en) |
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2021
- 2021-03-29 CN CN202120633059.XU patent/CN216161660U/en active Active
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