CN219891375U - Small electromagnetic relay contact detection device - Google Patents
Small electromagnetic relay contact detection device Download PDFInfo
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- CN219891375U CN219891375U CN202321142104.7U CN202321142104U CN219891375U CN 219891375 U CN219891375 U CN 219891375U CN 202321142104 U CN202321142104 U CN 202321142104U CN 219891375 U CN219891375 U CN 219891375U
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- relay
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- relays
- power supply
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000011179 visual inspection Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model relates to the technical field of relays, in particular to a small electromagnetic relay contact detection device. The control circuit comprises a power module, a detection module and a relay socket to be tested. After mains supply is connected, the AC220V, DC24V, DC V which respectively enters the power supply module through the switch is connected with the fan. The output of the power supply module AC220V and DC24V is connected with a voltage selection switch in the detection module, the output of the voltage selection switch is connected with a coil power supply switch, and the output of the coil power supply switch is connected with coil terminals of four relays of the tested relay base. The power module DC24V module outputs the other path of load resistor in the detection module, and is connected with the contact terminals of the four relays of the direct current ammeter and the tested relay base in series. The power module DC12V is connected with and supplies power to a millivolt voltmeter in the detection module, and the millivolt voltmeter is connected with contact terminals of four relays of the relay base to be tested. The method has the characteristics of high speed, high efficiency, accuracy and simplicity in operation of detecting the relay contacts.
Description
Technical Field
The utility model relates to the technical field of relays, in particular to a small electromagnetic relay contact detection device. The use condition and the service life of the small electromagnetic relay contact can be detected rapidly and accurately.
Background
In the prior art, a miniature relay is an automatic switching element with an isolating function, is most widely applied and is one of the most important control elements. The field has hundreds of thousands of miniature relays used on line at present, and the production of all production lines is controlled. The on-off frequency of the small relays in the number is different, and whether the service life of the small relays is replaced in advance or not can not be judged by estimating the on-off frequency, so that the relay faults influence the production of a production line. And most of relay faults are damaged by contacts, so that a circuit cannot be reliably completed. Currently, only two methods of universal meters and visual inspection are used for detecting the relay, and the two methods have great disadvantages. The miniature relay generally has 2 or 4 groups of contacts, adopts the universal meter to detect the contact, measures 2 or 4 times when the coil of each relay cuts off the power supply, measures 2 or 4 times when the coil gets the power supply, and partial relay needs to demolish the external circuit and measures. In particular, a large number of relays are arranged in a set of control system, and the time and the labor are wasted when a universal meter is used for measuring the contact points. The visual inspection method can only check the color change and closing of the contacts, and can not judge whether the contacts are in good contact, and meanwhile, for a relay with 4 groups of contacts, only two groups of contacts on two sides can be seen, and the 2 groups of contacts in the middle can not be observed. The device for detecting the relay contacts is similar to the device for detecting the relay contacts in the utility model patent 201920354712.1, and the device is composed of a relay contact detection module, a relay contact electric cleaning module and a relay resistance detection module, and can only detect the relay with the coil voltage of 110V special for the metro vehicle.
Disclosure of Invention
The utility model aims to provide a small electromagnetic relay contact detection device which is rapid and accurate in detection and simple to operate.
The technical scheme of the utility model is as follows: the small electromagnetic relay contact detection device is characterized in that a control circuit comprises a power module, a detection module and a relay socket to be detected.
After mains supply is connected, the AC220V, DC24V, DC V which respectively enters the power supply module through the switch is connected with the fan.
The output of the power supply module AC220V and DC24V is connected with a voltage selection switch in the detection module, the voltage selection switch is provided with three gears of left, zero and right, the gears respectively represent AC220V and 0V, DC V, the output of the voltage selection switch is connected with a coil power supply switch, the output of the coil power supply switch is connected with coil terminals of four relays of a tested relay base, and the on and off of the coils of the relays are controlled.
The power module DC24V module outputs the other path of load resistor in the detection module, and is connected with the contact terminals of the four relays of the direct current ammeter and the tested relay base in series.
The power module DC12V is connected with and supplies power to a millivolt voltmeter in the detection module, and the millivolt voltmeter is connected with contact terminals of four relays of the tested relay base and is used for detecting voltage values of relay contacts.
And the relay base A, the relay base B, the relay base C and the relay base D of the relay base to be tested respectively detect four groups of contacts of the relay according to the sequence from left to right of the relay.
The load resistance model was 150w5Ω.
The utility model has the advantages that: 1. the device has the advantages of high speed, high efficiency and accuracy in detecting the relay contacts, simple operation and 20 seconds average, can finish the detection of one relay contact, can finish the detection by plugging and unplugging 2 times or 4 times, does not need any auxiliary tool, and is particularly suitable for relay detection tasks in a large batch. 2. The contact detection is carried out under the rated current of the relay, and meanwhile, the direct-viewing display of the numbers such as current, voltage and the like is realized, the contact performance detection is accurate, and the operation method is simple and convenient.
Embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic circuit diagram of the present utility model.
Detailed Description
Referring to fig. 1, the part names are as follows: the electric power supply device comprises a mains supply (1), a switch (2), a millivolt voltmeter (3), a fan (4), a voltage selection switch (5), a coil power supply switch (6), a tested relay base (7), a load resistor (8), a direct current ammeter (9), a relay base A, a relay base B, a relay base C and a relay base D.
Referring to fig. 1, the small electromagnetic relay contact detection apparatus includes a power module, a detection module, and a relay socket to be tested. After the mains supply 1 is connected, the mains supply 1 respectively enters the AC220V, DC24V, DC V of the power supply module through the switch 2, and simultaneously supplies power to the fan 4 for heat dissipation.
The output of the power supply module AC220V and DC24V enter the voltage selection switch 5, and the voltage selection switch 5 has three gears of left, zero and right, which respectively represent AC220V and 0V, DC V; the output of the voltage selection switch 5 enters the coil power supply switch 6, and the coil power supply switch 6 outputs coil terminals of four relays connected with the tested relay base 7 to control the on and off of the relay coil.
The other path of output of the DC24V module enters a load resistor 8, the model of the load resistor 8 is 150W5 omega, and the load resistor 8 is connected with a direct current ammeter 9 and contact terminals of four relays of a tested relay base 7 in series, and when the relay is inserted, the current of the contact is ensured to be close to rated current 5A.
The DC12V module supplies power for the millivolt voltmeter 3, the electric millivolt voltmeter 3 is connected in parallel to contact terminals of four relays of the tested relay base 7 and used for detecting voltage values of the relay contacts, and the service condition of the relay contacts can be judged according to the voltage values displayed by the millivolt voltmeter 3.
And 4 groups of contacts of the relay are detected respectively according to the sequence from left to right of the relay base A, the relay base B, the relay base C and the relay base D of the relay base 7 to be tested. If the relay is 2 groups of contacts, only the relay base A and the relay base D need to be inserted.
The application method or the working principle is as follows: the method is mainly used for rapidly and massively detecting the small-sized relay with the coil voltage of AC220V and DC24V in industrial production. The working principle is that after the commercial power is converted, the on-off of the relay coil is controlled, the rated current of the contact is connected to the contact line of the relay to be detected, and the voltage value when the contact is closed or opened under the rated current is measured. The smaller the voltage is, the better the contact is closed, and the larger the voltage is, the better the contact is opened.
The above description is only of specific embodiments of the present utility model, and the various illustrations do not limit the essential content of the present utility model.
Claims (2)
1. The small electromagnetic relay contact detection device is characterized in that a control circuit comprises a power module, a detection module and a relay socket to be detected;
after the mains supply (1) is connected, the AC220V, DC24V, DC V which respectively enters the power supply module through the switch (2) is connected with the fan (4);
the output of the power supply module AC220V and DC24V is connected with a voltage selection switch (5) in the detection module, the voltage selection switch (5) is provided with three gears of left, zero and right, which respectively represent AC220V and 0V, DC V, the output of the voltage selection switch (5) is connected with a coil power supply switch (6), and the coil power supply switch (6) is connected with coil terminals of four relays of a tested relay base (7) in an output manner to control the on and off of a relay coil;
the power module DC24V module outputs the other path of load resistor (8) in the detection module, and is connected with the contact terminals of the four relays of the DC ammeter (9) and the tested relay base (7) in series;
the power module DC12V is connected with and supplies power to the millivolt voltmeter (3) in the detection module, and the millivolt voltmeter (3) is connected with the contact terminals of the four relays of the tested relay base (7) and is used for detecting the voltage value of the relay contacts;
and the relay base A, the relay base B, the relay base C and the relay base D of the relay base (7) to be tested respectively detect four groups of contacts of the relay according to the sequence from left to right of inserting the relay.
2. A miniature electromagnetic relay contact detection apparatus according to claim 1, characterized in that the load resistor (8) is of the type 150W5 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321142104.7U CN219891375U (en) | 2023-05-12 | 2023-05-12 | Small electromagnetic relay contact detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321142104.7U CN219891375U (en) | 2023-05-12 | 2023-05-12 | Small electromagnetic relay contact detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219891375U true CN219891375U (en) | 2023-10-24 |
Family
ID=88408875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321142104.7U Active CN219891375U (en) | 2023-05-12 | 2023-05-12 | Small electromagnetic relay contact detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219891375U (en) |
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2023
- 2023-05-12 CN CN202321142104.7U patent/CN219891375U/en active Active
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