CN214953995U - Power supply product input short circuit detection device used before strong current test - Google Patents
Power supply product input short circuit detection device used before strong current test Download PDFInfo
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- CN214953995U CN214953995U CN202120145186.5U CN202120145186U CN214953995U CN 214953995 U CN214953995 U CN 214953995U CN 202120145186 U CN202120145186 U CN 202120145186U CN 214953995 U CN214953995 U CN 214953995U
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Abstract
The utility model discloses a power supply product input short circuit detection device used before strong current test, which comprises a socket used for being connected with two input ends of a power supply product, a double-pole double-throw relay J1 is arranged in the socket, a first controlled switch common end of a relay J1 is connected with one input end of the power supply product, a normally open end of the first controlled switch is connected with an AC power zero line and a normally closed end is grounded, a normally open end of a second controlled switch is connected with an AC power live line, the normally closed end of the second controlled switch is connected with an input end short circuit detection circuit which controls an alarm circuit to alarm when the two input ends of the power supply product are short-circuited and controls a relay J1 to attract the first controlled switch and the second controlled switch when the two input ends of the power supply product are open-circuited, thereby enabling the power supply product to carry out the AC power strong current test and realizing the input end short circuit detection of the charger power supply product before the 220V alternating current is conducted, and sound and light alarm is given when short circuit is detected, and poor charger power supply products are prompted to be processed.
Description
[ technical field ]
The utility model relates to a power product input short circuit detection device for before forceful electric power test.
[ background art ]
In the existing testing device for testing the charger power supply product, short-circuit detection on the input end of the power supply product before the power supply is strengthened by 220V is mostly lacked, so that fuse damage or air switch tripping caused by the short-circuit of the input end is easy to occur; some existing testing devices adopt a fuse, an air switch or a current-limiting protection lamp mode to realize input end short-circuit protection, for example, a bulb is connected in series for current limiting, and the detection of the short circuit of the input end of a power supply product is realized by a mode of triggering protection after the power is applied to a product to be tested, but the equipment needs to be restarted and the short-circuit protection operation is recovered after the short circuit occurs to test the next product to be tested, so that the testing efficiency is low, and meanwhile, in order to not influence the operation of other equipment, an independent power supply circuit is also needed, thereby greatly increasing the cost; the above-mentioned mode of adopting fuse, air switch or current-limiting protection to realize the input short circuit aspect protection is the protective measure who takes after strengthening the electricity 220V, therefore can't avoid the damage of the product that awaits measuring completely.
[ contents of utility model ]
The utility model overcomes above-mentioned technique is not enough, provides a power product input short circuit detection device for before forceful electric power test.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a power product input short circuit detection device for before forceful electric power test which characterized in that: the power supply comprises a socket used for being connected with two input ends of a power supply product, a double-pole double-throw relay J1 is arranged in the socket, a first controlled switch public connection end of the relay J1 is connected with one input end of the power supply product, a normally open end of the first controlled switch is connected with an AC power zero line, a normally closed end of the first controlled switch is grounded, a normally open end of the second controlled switch is connected with an AC power live line, and the normally closed end of the second controlled switch is connected with an input end short-circuit detection circuit which controls an alarm circuit to alarm when the two input ends of the power supply product are short-circuited and controls the relay J1 to attract the first controlled switch and the second controlled switch when the two input ends of the power supply product are open-circuited, so that the power supply product can carry out an AC power strong current test.
The input short circuit detection device for the power supply product before the strong current test is characterized in that: the alarm circuit comprises a triode Q1, an emitting electrode of a triode Q1 is grounded, a collector electrode of a triode Q1 is connected with one end of a buzzer BUZ, a base electrode of the triode Q1 is connected with a positive electrode end of a voltage stabilizing diode D2, a negative electrode end of a voltage stabilizing diode D2 is respectively connected with a positive electrode end of a diode D4, a positive electrode end of a diode D3 and one end of a resistor R1, the other end of the resistor R1 and the other end of the buzzer BUZ are respectively connected with a 12V power supply, and a negative electrode end of the diode D4 and a negative electrode end of a diode D3 are respectively connected with an input end short circuit detection circuit.
The input short circuit detection device for the power supply product before the strong current test is characterized in that: the input end short circuit detection circuit comprises a triode Q2, an emitter of the triode Q2 is grounded, a collector of the triode Q2 is connected with a positive end of a diode D1, a negative end of the diode D1 is connected with a 12V power supply, two control ends of a relay J1 are respectively connected with two ends of a diode D1, a base of the triode Q2 is connected with a positive end of a voltage-stabilizing diode D5, a negative end of the voltage-stabilizing diode D5 is respectively connected with a normally-closed end of a second controlled switch of the relay J1 and one end of a resistor R2, the other end of the resistor R2 is respectively connected with one end of a resistor R3 and an alarm circuit, and the other end of the resistor R3 is grounded.
The utility model has the advantages that:
the utility model can detect the short circuit of the input end of the product before the 220V alternating current is supplied to the charger power supply product to be detected, and can give an audible and visual alarm when detecting the short circuit of the input end to prompt the processing of bad charger power supply products; meanwhile, when the input end is detected to be not short-circuited, the double-pole double-throw relay is used for controlling the two input ends of the charger power supply product to be respectively connected with 220V strong current, so that the automatic detection of the input short circuit of the power supply product before strong current test is realized, the problems of AC Source automatic protection or AC tripping and the like are avoided, and the input end short-circuit protection does not need to be manually reset.
[ description of the drawings ]
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
[ detailed description of the invention ]
The following description is further detailed with reference to the accompanying drawings and embodiments of the present invention:
as shown in fig. 1, a power supply product input short-circuit detection device used before a strong current test includes a socket 1 used for being connected with two input ends of a power supply product, a double-pole double-throw relay J1 is arranged in the socket 1, a first controlled switch common end of the relay J1 is connected with one input end of the power supply product, a normally open end of the first controlled switch is connected with an AC power zero line, a normally closed end of the first controlled switch is grounded, a normally open end of the second controlled switch is connected with an AC power live line, and a normally closed end of the second controlled switch is connected with an input end short-circuit detection circuit 3 which controls an alarm circuit 2 to alarm when the two input ends of the power supply product are short-circuited and controls a relay J1 to attract the first controlled switch and the second controlled switch when the two input ends of the power supply product are open-circuited, so that the power supply product performs the strong current test on the AC power supply.
During testing, after two input ends of a charger power supply product are inserted into the socket 1 and pressed down to be in place, the male terminals of two controlled switches of a double-pole double-throw relay J1 arranged in the socket 1 are respectively connected with the two input ends, when the input ends are short-circuited, the relay J1 is not attracted, the male terminals of a first controlled switch and a second controlled switch of the relay J1 are connected with a normally closed end, and the input end short-circuit detection circuit 3 controls the alarm circuit 2 to alarm to prompt that the test power supply product is a defective product; when the input end is disconnected, the relay J1 is closed, the common connection end of the first controlled switch and the second controlled switch of the relay J1 is switched to be connected with the normally open end, 220V strong current is input into the charger power supply product to carry out subsequent strong current test, and automatic detection of input short circuit of the power supply product before the strong current test is realized.
As shown in fig. 1, the alarm circuit 2 includes a triode Q1, an emitter of the triode Q1 is grounded, a collector of the triode Q1 is connected with one end of the buzzer BUZ, a base of the triode Q1 is connected with a positive terminal of a zener diode D2, a negative terminal of the zener diode D2 is connected with a positive terminal of a diode D4, a positive terminal of a diode D3 and one end of a resistor R1 respectively, the other end of the resistor R1 and the other end of the buzzer BUZ are connected with a 12V power supply respectively, and a negative terminal of the diode D4 and a negative terminal of a diode D3 are connected with the input end short-circuit detection circuit 3 respectively; the input end short circuit detection circuit 3 comprises a triode Q2, an emitter of the triode Q2 is grounded, a collector of the triode Q2 is connected with an anode end of a diode D1, a cathode end of the diode D1 is connected with a 12V power supply, two control ends of a relay J1 are respectively connected with two ends of a diode D1, a base of the triode Q2 is connected with an anode end of a voltage-stabilizing diode D5, a cathode end of the voltage-stabilizing diode D5 is respectively connected with a second controlled switch normally-closed end of the relay J1 and one end of a resistor R2, the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the alarm circuit 2, and the other end of the resistor R3 is grounded.
When the two input ends of the power supply product are short-circuited, the triode Q2 is not conducted, the triode Q1 is conducted, and the buzzer BUZ is electrified to work, so that the power supply product is a defective product; when the triode Q2 is conducted and the triode Q1 is not conducted, the relay J1 attracts the first controlled switch and the second controlled switch, 220V strong current is automatically input to the charger power supply product for subsequent strong current test, whether the input end of the power supply product is short-circuited is checked through 12V low voltage, whether the 220V strong current is accessed for subsequent strong current test is automatically controlled, and automatic test is achieved.
Claims (3)
1. The utility model provides a power product input short circuit detection device for before forceful electric power test which characterized in that: the power supply short circuit detection circuit comprises a socket (1) used for being connected with two input ends of a power supply product, a double-pole double-throw relay J1 is arranged in the socket (1), a first controlled switch common connection end of the relay J1 is connected with one input end of the power supply product, a first controlled switch normally open end is connected with an AC power supply zero line, a normally closed end is grounded, a second controlled switch normally open end is connected with an AC power supply live line, and a second controlled switch normally closed end is connected with an input end short circuit detection circuit (3) which controls an alarm circuit (2) to alarm when the two input ends of the power supply product are short-circuited and controls a relay J1 to attract the first controlled switch and the second controlled switch when the two input ends of the power supply product are open-circuited so that the power supply product can carry out AC power supply testing.
2. The input short circuit detection device for power supply product before strong current test as claimed in claim 1, wherein: the alarm circuit (2) comprises a triode Q1, an emitting electrode of the triode Q1 is grounded, a collector electrode of the triode Q1 is connected with one end of a buzzer BUZ, a base electrode of the triode Q1 is connected with a positive electrode end of a voltage stabilizing diode D2, a negative electrode end of the voltage stabilizing diode D2 is connected with a positive electrode end of a diode D4, a positive electrode end of a diode D3 and one end of a resistor R1 respectively, the other end of the resistor R1 and the other end of the buzzer BUZ are connected with a 12V power supply respectively, and a negative electrode end of the diode D4 and a negative electrode end of a diode D3 are connected with an input end short circuit detection circuit (3) respectively.
3. The input short circuit detection device for power supply product before strong current test as claimed in claim 1, wherein: the input end short circuit detection circuit (3) comprises a triode Q2, an emitting electrode of the triode Q2 is grounded, a collector electrode of the triode Q2 is connected with an anode end of a diode D1, a cathode end of the diode D1 is connected with a 12V power supply, two control ends of a relay J1 are respectively connected with two ends of a diode D1, a base electrode of the triode Q2 is connected with an anode end of a voltage-stabilizing diode D5, a cathode end of a voltage-stabilizing diode D5 is respectively connected with a normally-closed end of a second controlled switch of the relay J1 and one end of a resistor R2, the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the alarm circuit (2), and the other end of the resistor R3 is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120145186.5U CN214953995U (en) | 2021-01-20 | 2021-01-20 | Power supply product input short circuit detection device used before strong current test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120145186.5U CN214953995U (en) | 2021-01-20 | 2021-01-20 | Power supply product input short circuit detection device used before strong current test |
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| CN214953995U true CN214953995U (en) | 2021-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117748405A (en) * | 2024-02-21 | 2024-03-22 | 成都凯天电子股份有限公司 | Short-circuit protection device for heating wire of airspeed tube of aircraft |
-
2021
- 2021-01-20 CN CN202120145186.5U patent/CN214953995U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117748405A (en) * | 2024-02-21 | 2024-03-22 | 成都凯天电子股份有限公司 | Short-circuit protection device for heating wire of airspeed tube of aircraft |
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