CN217606037U

CN217606037U - Portable relay contact reliability testing device

Info

Publication number: CN217606037U
Application number: CN202221146510.6U
Authority: CN
Inventors: 詹浩镔; 余宗锋
Original assignee: Mtr Rail Transit Shenzhen Co ltd
Current assignee: Mtr Rail Transit Shenzhen Co ltd
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-10-18
Anticipated expiration: 2032-05-12

Abstract

The utility model discloses a portable relay contact reliability testing device, which comprises a casing, a resistor and a silicon controlled rectifier which are arranged in the casing, and a socket P1, a diode indicator light and a reset switch S1 which are arranged on the surface of the casing; an even number of access points are arranged on the socket P1, and every two access points are in a group and are used for connecting a corresponding group of relay contacts; one of each group of access points is connected with a VCC + end, the other access point is connected with the anode of a diode indicator lamp through a resistor, the cathode of the diode indicator lamp is connected with the A pole of a controllable silicon, the K pole of the controllable silicon is connected with the VCC-end, the G pole of the controllable silicon is connected with one end of a reset switch S1 through another resistor, and the other end of the reset switch S1 is connected with the VCC + end. The utility model discloses can directly place in the vehicle regulator cubicle, carry out live on-line monitoring to the relay contact, maintenance personal only need judge the pilot lamp state, just can know whether corresponding relay contact breaks down.

Description

Portable relay contact reliability testing device

Technical Field

The utility model relates to a reliability testing device especially relates to a portable relay contact reliability testing device, mainly is applicable to the reliability detection of railcar relay contact.

Background

The existing subway vehicle control system still adopts a large number of relays or contactors for control, so that the reliability of the relays directly influences the running reliability of vehicles. The contact of part relay is accident trouble, for example the contact flash of broken glass, because its duration is shorter, consequently can't accurately catch the fault point, and the equipment that relates to on the control link is more moreover, is unfavorable for maintenance personal to carry out failure analysis and investigation. In order to ensure operation, maintenance personnel often replace the devices of the relevant control links one by one, thereby causing a great deal of maintenance waste.

There is not special contact reliability testing arrangement in the market at present, generally adopts oscilloscope or desk-top universal meter to carry out alone test to the relay, but has following technical shortcoming:

1) Only single test can be carried out, and the actual operation working condition and environment of the vehicle cannot be simulated;

2) Only at most two pairs of contacts can be tested simultaneously, and the simultaneous testing of a plurality of pairs of contacts cannot be met;

3) The long-time online monitoring cannot be realized by adopting manual monitoring;

4) If monitoring on the passenger train, not only get the electricity inconvenient, influence the passenger, there are various electromagnetic interference in the vehicle scene moreover, cause data acquisition mistake easily, the reliability is relatively poor.

Disclosure of Invention

To the above-mentioned existing technical problem, the utility model provides a portable relay contact reliability testing arrangement to realize many to the contact simultaneous testing, accurate seizure fault point makes things convenient for real-time on-line monitoring, increases technical purpose such as reliability that detects.

In order to achieve the above object, the utility model provides a portable relay contact reliability testing device, which comprises a casing, a resistor and a thyristor which are arranged in the casing, and a socket P1, a diode indicator light and a reset switch S1 which are arranged on the surface of the casing;

an even number of access points are arranged on the socket P1, and every two access points are in a group and are used for connecting a corresponding group of relay contacts;

one of each group of access points is connected with a VCC + end, the other access point is connected with the anode of a diode indicator lamp through a resistor, the cathode of the diode indicator lamp is connected with the A pole of a controllable silicon, the K pole of the controllable silicon is connected with the VCC-end, the G pole of the controllable silicon is connected with one end of a reset switch S1 through another resistor, and the other end of the reset switch S1 is connected with the VCC + end.

Furthermore, the controllable silicon adopts MCR100 unidirectional controllable silicon.

Furthermore, the utility model also comprises a resistor R0 arranged in the casing and a diode indicator LED0 arranged on the surface of the casing; the VCC + end is connected with the anode of the diode indicator light LED0 through the resistor R0, and the cathode of the diode indicator light LED0 is connected with the VCC-end.

Furthermore, the utility model also comprises a fuse F1 arranged in the shell; the other end of the reset switch S1 and one of the access points of each group of the socket P1 are respectively connected with a VCC + end through a fuse F1.

Furthermore, the fuse F1 adopts a 250mA fuse.

Furthermore, the utility model also comprises a battery box arranged in the casing; VCC + end and VCC-end are connected with the positive and negative poles of the battery box respectively.

Furthermore, 3 sections of DC1.5V dry batteries are placed in the battery box.

The utility model discloses a theory of operation as follows: by using the on-off principle of the one-way thyristor, forward voltage is firstly added to the control electrode of the thyristor to turn on the thyristor, and the corresponding diode indicator lamp is lightened at the moment. Then the voltage of the controlled silicon is cut off, the controlled silicon still keeps the conducting state, and at the moment, the corresponding diode indicator lamp keeps on constantly. If the corresponding relay contact is in a flash open circuit, the silicon controlled rectifier is turned off, the corresponding diode indicator lamp is turned off, and the corresponding silicon controlled rectifier cannot be conducted even if the flash relay contact is closed again. Therefore, maintenance personnel can know whether the corresponding relay contact has a fault only by judging the state of the indicator lamp.

To sum up, compare prior art, the utility model discloses following technical advantage has:

1. the unidirectional silicon controlled rectifier is used as a core component, so that the detection circuit is stable and reliable.

2. Multiple pairs of relay contacts can be monitored simultaneously, and capacity expansion can be continued according to actual conditions.

3. The relay contact can be directly placed in a vehicle electrical cabinet to carry out live online monitoring on the relay contact.

4. The test result can be known through the indicator light without manual staring and controlling, and is visual.

5. 3 sections of 1.5V dry batteries are used for supplying power, extra power taking is not needed, the portability is strong, and the application scene is wider.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a circuit diagram of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, the utility model comprises a casing, a resistor and a thyristor which are arranged in the casing, and a socket P1, a diode indicator light and a reset switch S1 which are arranged on the surface of the casing; an even number of access points are arranged on the socket P1, and the two access points form a group and are used for connecting relay contacts; and one access point in each group is connected with a VCC + end, the other access point is connected with the anode of a diode indicator lamp through a resistor, the cathode of the diode indicator lamp is connected with the A pole of a controllable silicon, the K pole of the controllable silicon is connected with the VCC-end, the G pole of the controllable silicon is connected with one end of a reset switch S1 through another resistor, and the other end of the reset switch S1 is connected with the VCC + end.

As shown in fig. 2, in an embodiment of the present invention, 12 access points are provided on the socket P1, and can be divided into 6 groups for correspondingly connecting 6 groups of relay contact points. Wherein:

access points

1 and 2,

access points

3 and 4,

access points

5 and 6, access points 7 and 8, access points 9 and 10, and access points 11 and 12, respectively, as a group.

A first group: VCC + end is connected to socket P1 ' S access point 1, and access point 2 connects diode pilot lamp LED1 ' S positive pole through resistance R1, and the A utmost point of silicon controlled rectifier Q1 is connected to diode pilot lamp LED1 ' S negative pole, and VCC-end is connected to silicon controlled rectifier Q1 ' S K utmost point, and reset switch S1 ' S one end is connected through resistance R7 to silicon controlled rectifier Q1 ' S the G utmost point, and VCC + end is connected to reset switch S1 ' S the other end.

Second group: VCC + end is connected to socket P1 ' S access point 3, and access point 4 connects diode pilot lamp LED2 ' S positive pole through resistance R2, and thyristor Q2 ' S the A utmost point is connected to diode pilot lamp LED2 ' S negative pole, and VCC-end is connected to thyristor Q2 ' S the K utmost point, and the G utmost point of thyristor Q2 connects reset switch S1 ' S one end through resistance R8, and VCC + end is connected to reset switch S1 ' S the other end.

Third group: VCC + end is connected to socket P1 ' S access point 5, and access point 6 connects diode pilot lamp LED3 ' S positive pole through resistance R3, and silicon controlled rectifier Q3 ' S the A utmost point is connected to diode pilot lamp LED3 ' S negative pole, and VCC-end is connected to silicon controlled rectifier Q3 ' S K utmost point, and the G utmost point of silicon controlled rectifier Q3 connects reset switch S1 ' S one end through resistance R9, and VCC + end is connected to reset switch S1 ' S the other end.

And a fourth group: VCC + end is connected to socket P1 ' S access point 7, and access point 8 connects diode pilot lamp LED4 ' S positive pole through resistance R4, and thyristor Q1 ' S the A utmost point is connected to diode pilot lamp LED4 ' S negative pole, and VCC-end is connected to thyristor Q4 ' S the K utmost point, and the G utmost point of thyristor Q4 connects reset switch S1 ' S one end through resistance R10, and VCC + end is connected to reset switch S1 ' S the other end.

And a fifth group: VCC + end is connected to socket P1 ' S access point 9, and access point 10 connects diode pilot lamp LED5 ' S positive pole through resistance R5, and silicon controlled rectifier Q5 ' S the A utmost point is connected to diode pilot lamp LED5 ' S negative pole, and VCC-end is connected to silicon controlled rectifier Q5 ' S K utmost point, and the G utmost point of silicon controlled rectifier Q5 connects reset switch S1 ' S one end through resistance R11, and VCC + end is connected to reset switch S1 ' S the other end.

A sixth group: VCC + end is connected to socket P1 'S access point 11, and access point 12 connects diode pilot lamp LED 6' S positive pole through resistance R6, and the A utmost point of silicon controlled rectifier Q6 is connected to diode pilot lamp LED6 'S negative pole, and VCC-end is connected to silicon controlled rectifier Q6' S K utmost point, and the G utmost point of silicon controlled rectifier Q6 connects reset switch S1 'S one end through resistance R12, and VCC + end is connected to reset switch S1' S the other end.

In another embodiment of the present invention, the thyristor is an MCR100 unidirectional thyristor, so as to use the turn-off and turn-on principle of the unidirectional thyristor.

As shown in fig. 2, in another embodiment of the present invention, a resistor R0 is further installed in the casing, and a diode indicator LED0 is further installed on the surface of the casing. Specifically, the VCC + terminal is connected to the anode of the diode indicator light LED0 through the resistor R0, and the cathode of the diode indicator light LED0 is connected to the VCC-terminal. When the utility model discloses used power is normal during the power supply, diode pilot lamp LED0 is green.

As shown in fig. 2, in another embodiment of the present invention, a fuse F1 is further installed in the housing; the other end of the reset switch S1 and one of the access points of each group of the socket P1 are respectively connected with a VCC + end through a fuse F1. Specifically, the other end of the reset switch S1 is connected to the VCC + terminal through a fuse F1, and the

access points

1, 3, 5, 7, 9, and 11 of the socket P1 are connected to the VCC + terminal through fuses F1, respectively. In implementation, the fuse F1 adopts a 250mA fuse.

As shown in fig. 2, in other embodiments of the present invention, a battery box is further installed in the casing; VCC + end and VCC-end connect the positive negative pole of battery case respectively to supply power through the dry battery. In practice, 3 sections of DC1.5V dry batteries are placed in the battery box, and the VCC + end is the DC +4.5V end shown in figure 1.

The utility model discloses action process during the use as follows:

1) When the dry battery supplies power, DC +4.5V is normal, the diode indicator light LED0 is lighted green. Then,

access points

1 and 2 of the socket P1 are connected with a first group of relay contacts,

access points

3 and 4 are connected with a second group of relay contacts, and so on, and 6 groups of relay contacts can be connected at the same time in total and correspond to the relays K1-K6. In addition, the socket P1 can expand the number of access points according to the situation so as to access more groups of relay contacts and realize the simultaneous test of multiple pairs of contacts.

2) After the contacts of the relays K1-K6 are connected into the socket P1, the reset switch S1 is manually conducted, the silicon controlled rectifiers Q1-Q6 are conducted at the moment by utilizing the on-off principle of the one-way silicon controlled rectifiers, and the diode indicator lamps LED1-LED6 for displaying the functional status of the contacts of the relays K1-K6 are lighted red.

3) The reset switch S1 is manually turned off and the diode indicator lights LED1-LED6 continue to light up. In the test process, if a certain relay contact is flashed instantly, the corresponding diode indicator lamp is extinguished, so that the relay contact can be judged to be unstable, a fault point is accurately captured, and real-time online monitoring is facilitated.

The above embodiment is not the limit of the protection scope of the present invention, the embodiment of the present invention is not limited to this, and all kinds of modifications, replacements or changes according to the above content of the present invention, according to the common technical knowledge and the conventional means in the field, without departing from the basic technical idea of the present invention, should fall within the protection scope of the present invention.

Claims

1. A portable relay contact reliability testing device is characterized by comprising a machine shell, a resistor and a silicon controlled rectifier which are arranged in the machine shell, and a socket P1, a diode indicator lamp and a reset switch S1 which are arranged on the surface of the machine shell;

an even number of access points are arranged on the socket P1, and every two access points are in one group and are used for connecting a corresponding group of relay contacts;

2. The portable relay contact reliability testing device of claim 1, wherein the thyristor is an MCR100 unidirectional thyristor.

3. The portable relay contact reliability testing device of claim 1, further comprising a resistor R0 installed in the housing, and a diode indicator light LED0 installed on the surface of the housing; the VCC + end is connected with the anode of the diode indicator light LED0 through the resistor R0, and the cathode of the diode indicator light LED0 is connected with the VCC-end.

4. The portable relay contact reliability testing device according to claim 1, further comprising a fuse F1 installed in the housing; the other end of the reset switch S1 and one of the access points in each group of the socket P1 are respectively connected with a VCC + end through a fuse F1.

5. The portable relay contact reliability testing device according to claim 4, wherein the fuse F1 is a 250mA fuse.

6. The portable relay contact reliability testing device according to any one of claims 1 to 4, further comprising a battery compartment mounted in the housing; the VCC + end and the VCC-end are respectively connected with the anode and the cathode of the battery box.

7. The portable relay contact reliability testing device of claim 6, wherein 3 DC1.5V dry cells are placed in the battery box.