CN210954283U

CN210954283U - Fool-proof jig for power supply

Info

Publication number: CN210954283U
Application number: CN201921814031.5U
Authority: CN
Inventors: 刘斌; 毛鹏; 封朝南
Original assignee: Wuxi Quanyu Electronic Technology Co ltd
Current assignee: Wuxi Quanyu Electronic Technology Co ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-07-07
Anticipated expiration: 2029-10-25

Abstract

The utility model relates to the field of power supply jigs, and discloses a power supply fool-proofing jig, which comprises a jig box body, wherein the surface of the jig box body is provided with an alternating current power supply terminal, a direct current power supply terminal, a first power switch and a second power switch; a first relay, a second relay and a third relay are arranged in the jig box body; a voltage display meter is arranged outside the jig box body; the direct current power supply terminal and different loads are connected to every pair of normally open contact electricity of first relay, and the control coil break-make of first relay of first switch control is received power module's voltage output end during the test on the direct current power supply terminal that corresponds, closed first switch, if voltage display table shows that voltage is normal, then power module is qualified, through the many pairs of normally open contact of first relay, can measure the power module of different specifications.

Description

Fool-proof jig for power supply

Technical Field

The utility model relates to a power tool field, concretely relates to fool-proof tool is prevented to power.

Background

Most of the existing power supply modules convert an external alternating current input into 5V, 12V and 24V direct current voltage outputs. When the power module is produced, if the internal circuit is in a cold joint, the pin of the power chip is in poor contact or short circuit, the output voltage of the power module deviates from the range of normal output voltage, particularly when the power module is produced in a large scale, unqualified power modules need to be measured in time, otherwise, the normal use of customers is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the not enough of background art, the utility model provides a fool-proof tool is prevented to power, the technical problem that solve provide the output voltage of the power module who detects multiple specification whether normal tool.

For solving the technical problem, the utility model provides a following technical scheme: a power supply fool-proofing jig comprises a jig box body, wherein an alternating current power supply terminal, a direct current power supply terminal, a first power supply switch and a second power supply switch are arranged on the surface of the jig box body; a first relay, a second relay and a third relay are arranged in the jig box body; a voltage display meter is arranged outside the jig box body; the first relay and the third relay comprise four pairs of normally open contacts, and the second relay comprises two pairs of normally open contacts;

the L pole of the alternating current power supply terminal is electrically connected with a contact of a control coil of the first relay through the first power switch, the L pole of the alternating current power supply terminal is also electrically connected with a contact of a control coil of the second relay and a contact of a control coil of the third relay through the second power switch respectively, and the other contacts of the control coils of the first relay, the second relay and the third relay are electrically connected with the N pole of the alternating current power supply terminal;

the direct-current power supply terminal comprises a grounding terminal, a 5V voltage terminal, a 12V voltage terminal and a 24V voltage terminal, the grounding terminal is electrically connected with the input ends of a first pair of normally open contacts of the first relay and the third relay respectively, the 5V voltage terminal is electrically connected with the input ends of a second pair of normally open contacts of the first relay and the third relay respectively, the 12V voltage terminal is electrically connected with the input ends of a third pair of normally open contacts of the first relay and the third relay respectively, and the 24V voltage terminal is electrically connected with the input ends of a fourth pair of normally open contacts of the first relay and the third relay respectively; the output ends of a first pair of normally open contacts of the first relay are respectively and electrically connected with a resistor R1, a resistor R2 and a resistor R3, the other end of the resistor R1 is electrically connected with the output ends of a second pair of normally open contacts of the first relay, two ends of the resistor R2 are connected with an electrolytic capacitor C1 in parallel, the other end of the resistor R2 and the anode of the electrolytic capacitor C1 are electrically connected with the output ends of a third pair of normally open contacts of the first relay, and the other end of the resistor R3 is electrically connected with the output ends of a fourth pair of normally open contacts of the first;

the voltage display meter is used for measuring and displaying the voltage across the resistor R1, the resistor R2 and the resistor R3 respectively.

The resistor R3 comprises three cement resistors connected in series in sequence, and the specification of the cement resistors is 50W 8R.

The model of the first relay and the model of the third relay are MY4N-J, and the model of the second relay is JQX-13F.

When the output voltages of the power supply modules with the specifications of 5V, 12V and 24V are measured respectively, a voltage output port and a grounding end of the power supply module are connected to a terminal on the surface of a jig box body, a first power switch K1 is turned on, the voltage between the corresponding terminal and the grounding end is measured through a voltage display meter, if the voltage displayed by the voltage display meter is between standard output voltages, the output voltage of the power supply module is normal, otherwise, an internal circuit of the power supply module needs to be detected, and faults are eliminated. In addition, the normally open contact and the normally closed contact of the second relay can be opened to control the on-off of the signal of the power supply module, and the connection is specifically carried out according to the actual condition.

Compared with the prior art, the utility model beneficial effect who has is: whether the output voltage of the power supply module with various specifications is normal or not can be detected on the same jig through the first relay and the first power switch, the measurement steps are simplified, in addition, different specification test loops correspond to different test loads, and the large current is prevented from appearing on a test circuit.

Drawings

The utility model discloses there is following figure:

fig. 1 is a schematic view of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1, a power fool-proof fixture comprises a fixture box body, wherein an ac power terminal, a dc power terminal, a first power switch K1 and a second power switch K2 are arranged on the surface of the fixture box body; a first relay 1, a second relay 2 and a third relay 3 are arranged in the jig box body; a voltage display meter is arranged outside the jig box body; the first relay 1 and the third relay 3 respectively comprise four pairs of normally open contacts, and the second relay 2 comprises two pairs of normally open contacts;

the L pole of the alternating current power supply terminal is electrically connected with a first contact of a control coil of the first relay 1 through a first power switch K1, the L pole of the alternating current power supply terminal is also electrically connected with a first contact of a control coil of the second relay 2 and a first contact of a control coil of the third relay 3 through a second power switch K2, and the other contacts of the control coils of the first relay 1, the second relay 2 and the third relay 3 are electrically connected with the N pole of the alternating current power supply terminal;

the direct current power supply terminal comprises a grounding terminal gnd, a 5V voltage terminal, a 12V voltage terminal and a 24V voltage terminal, the grounding terminal gnd is electrically connected with the input ends of a first pair of normally open contacts of the first relay 1 and the third relay 3 respectively, the 5V voltage terminal is electrically connected with the input ends of a second pair of normally open contacts of the first relay 1 and the third relay 3 respectively, the 12V voltage terminal is electrically connected with the input ends of a third pair of normally open contacts of the first relay 1 and the third relay 3 respectively, and the 24V voltage terminal is electrically connected with the input ends of a fourth pair of normally open contacts of the first relay 1 and the third relay 3 respectively; the output ends of a first pair of normally open contacts of the first relay 1 are respectively and electrically connected with a resistor R1, a resistor R2 and a resistor R3, the other end of the resistor R1 is electrically connected with the output ends of a second pair of normally open contacts of the first relay 1, two ends of the resistor R2 are connected with an electrolytic capacitor C1 in parallel, the other end of the resistor R2 and the anode of the electrolytic capacitor C1 are electrically connected with the output ends of a third pair of normally open contacts of the first relay 1, and the other end of the resistor R3 is electrically connected with the output ends of a fourth pair of normally open contacts of the first relay;

The utility model discloses in, the ground terminal is inserted respectively to the input of the first to fourth pair of normally open contact of first relay 1, 5V voltage terminal, 12V voltage terminal and 24V voltage terminal, the second to fourth pair of normally open contact respectively with the first pair of normally open contact constitution measurement return circuit, wherein the measuring load in every return circuit is also different, confirm according to the voltage specification, resistance R1 is 2R, resistance R2 is 1.5K, resistance R3 is 12R, on the one hand through the operational environment of load simulation actual power module, on the other hand restricts the electric current in the measurement return circuit.

When the output voltages of the power supply modules with the specifications of 5V, 12V and 24V are measured respectively, a voltage output port and a grounding end of the power supply module are connected to a terminal on the surface of a jig box body, the voltage between the corresponding terminal and the grounding end is measured through a voltage display table, a first power switch K1 is turned on, if the voltage displayed by the voltage display table is between standard output voltages, the output voltage of the power supply module is normal, otherwise, an internal circuit of the power supply module needs to be checked, faults are eliminated, and it needs to be noted that the first power switch K1 and a second power switch K2 cannot be closed simultaneously. In addition, the normally open contact and the normally closed contact of the second relay 2 can be opened to control the on-off of the signal of the power supply module, and the connection is specifically carried out according to the actual condition.

When the output voltage of each power supply module is normal, the first power supply switch K1 is switched off, the second power supply switch K2 is switched on, and other functions of the power supply modules are tested through the third relay 3.

In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a fool-proof jig for power supply, includes the jig box body, its characterized in that: the surface of the jig box body is provided with an alternating current power supply terminal, a direct current power supply terminal, a first power switch and a second power switch; a first relay, a second relay and a third relay are arranged in the jig box body; a voltage display meter is arranged outside the jig box body; the first relay and the third relay comprise four pairs of normally open contacts, and the second relay comprises two pairs of normally open contacts;

the L pole of the alternating current power supply terminal is electrically connected with a contact of a control coil of a first relay through a first power switch, the L pole of the alternating current power supply terminal is also electrically connected with a contact of a control coil of a second relay and a contact of a control coil of a third relay through a second power switch respectively, and the other contacts of the control coils of the first relay, the second relay and the third relay are electrically connected with the N pole of the alternating current power supply terminal;

the direct-current power supply terminal comprises a grounding terminal, a 5V voltage terminal, a 12V voltage terminal and a 24V voltage terminal, wherein the grounding terminal is electrically connected with input ends of a first pair of normally open contacts of the first relay and the third relay respectively, the 5V voltage terminal is electrically connected with input ends of a second pair of normally open contacts of the first relay and the third relay respectively, the 12V voltage terminal is electrically connected with input ends of a third pair of normally open contacts of the first relay and the third relay respectively, and the 24V voltage terminal is electrically connected with input ends of a fourth pair of normally open contacts of the first relay and the third relay respectively; the output ends of a first pair of normally open contacts of the first relay are respectively and electrically connected with a resistor R1, a resistor R2 and a resistor R3, the other end of the resistor R1 is electrically connected with the output ends of a second pair of normally open contacts of the first relay, two ends of the resistor R2 are connected with an electrolytic capacitor C1 in parallel, the other end of the resistor R2 and the anode of the electrolytic capacitor C1 are electrically connected with the output ends of a third pair of normally open contacts of the first relay, and the other end of the resistor R3 is electrically connected with the output ends of a fourth pair of normally open contacts of the first relay;

the voltage display meter is used for measuring and displaying the voltage of the two ends of the resistor R1, the resistor R2 and the resistor R3 respectively.

2. The fool-proof fixture of power supply of claim 1, characterized in that: the resistor R3 comprises three cement resistors connected in series in sequence, and the specification of the cement resistors is 50W 8R.

3. The fool-proof fixture of power supply of claim 1, characterized in that: the model of the first relay and the model of the third relay are MY4N-J, and the model of the second relay is JQX-13F.