Relay detection and verification device and method

Abstract

This invention discloses a relay testing and verification device and method. The device includes a housing, a base fixed to the front of the housing, a circuit board and a rear plate disposed inside the housing, and the base is used to insert the relay under test. The circuit board has a battery power supply circuit, multiple light-emitting diodes (LEDs), and a battery switch. The leads on the back of the base are detachably electrically connected to the circuit board via pluggable terminals. A power terminal and a self-resetting power test button are located at the bottom of the housing. The power terminal is connected to the relay coil via the power test button, forming a coil power supply circuit. During testing, the battery power supply circuit controls the LEDs to turn on and off according to the on / off state of the normally closed or normally open relay contacts, providing a direct display of the contact status. Pressing the power test button energizes the relay, verifying the contact switching function. This invention eliminates the need for individual multimeter measurements, provides intuitive and accurate testing, is safe and convenient to operate, and is applicable to various relay models.

Description

Technical Field

[0001] This document relates to the field of relay verification technology, and in particular to a relay testing and verification device and method. Background Technology

[0002] Relays are widely used control components in power systems. Among them, the DZ-3E pluggable relay is a common type, with eight pairs of contacts, which can be configured as normally open or normally closed combinations as needed.

[0003] Currently, there is a lack of dedicated equipment for testing this type of relay, and it mainly relies on manual methods: the relay is removed from the base, a power supply is temporarily connected to the coil pins to simulate excitation, and then a multimeter is used to measure the continuity of the contacts and the coil resistance point by point to determine whether the relay is good or bad.

[0004] This method has the following drawbacks: it is cumbersome and inefficient, requiring repeated wiring and point-by-point measurements; the conductive parts of the temporary wiring are exposed, posing a risk of electric shock and short circuit; the test results rely on multimeter readings, which are not intuitive; and it is difficult to conduct tests when there is no corresponding voltage power supply on site.

[0005] Furthermore, existing methods cannot simultaneously observe the operational status of multiple sets of contacts; the transition between normally closed and normally open contacts requires step-by-step measurement, further reducing detection efficiency. Currently, there is no convenient, safe, and intuitive dedicated detection and verification device to address these issues. Summary of the Invention

[0006] This invention provides a relay detection and verification device and method to solve the above-mentioned problems.

[0007] According to an embodiment of the present invention, a relay detection and verification device is provided, comprising: The housing has a front, a back and an internal accommodating space. The front has a base mounting hole, a diode indicator hole and a battery switch hole. The bottom has a power terminal hole and a test button hole. The base is fixedly installed in the base mounting hole on the front of the housing for inserting the test relay. The base is provided with a set of sockets corresponding to the relay pins. The set of sockets includes coil sockets and junction sockets. A circuit board is disposed inside the housing, with its front side facing the front of the housing. The circuit board is provided with a battery power supply circuit, multiple light-emitting diodes, a battery switch, and pluggable male terminals. The rear panel is fixed to the back of the outer casing and is used to close the internal accommodating space. The side of the rear panel facing the circuit board has a battery compartment for accommodating and limiting the battery on the circuit board. A power terminal is provided in a power terminal hole at the bottom of the housing for connecting an external test power source; A power test button is located in the test button hole at the bottom of the housing and is a self-resetting normally open button. The lead wires on the back of the base are detachably electrically connected to the pluggable terminal male on the circuit board via a female pluggable terminal. The first end of the power terminal is electrically connected to the first end of the coil of the base, and the second end of the power terminal is electrically connected to the second end of the coil of the base via the power test button, forming a relay coil power supply circuit; The battery power supply circuit is connected via the battery switch between the LED and the junction socket of the base, and is used to control the LED to turn on or off according to the on / off state of the relay junction.

[0008] Furthermore, the front of the housing has eight diode indicator light holes, which are symmetrically arranged on the left and right sides of the mounting hole on the base. Each diode indicator light hole contains a light-emitting diode, and the light-emitting end face of the light-emitting diode is exposed on the front of the housing.

[0009] Furthermore, the male plug-in terminal on the circuit board is a fixed end, located on the back of the circuit board, and the lead wire on the back of the base is connected to the female plug-in terminal. The female end is a movable end, and is plugged into the male end during use.

[0010] Furthermore, the circuit board is provided with printed circuit lines for the positive and negative terminals of the battery. The negative terminal of the battery is connected to the corresponding pin of the pluggable terminal block through the printed circuit lines, and then returns to the anode of the light-emitting diode through the base and relay node. The cathode of the light-emitting diode is connected to the positive terminal of the battery through the printed circuit lines and the battery switch.

[0011] Furthermore, the base is provided with a node shorting circuit, which shorts the first ends of multiple normally open nodes together and shorts the first ends of multiple normally closed nodes together, so that the number of leads on the back of the base matches the number of relay node pairs.

[0012] Furthermore, the power terminal is a banana terminal, which has a hollow copper structure and is covered with an insulating layer. The power terminal is equipped with a test connector, the male end of which is inserted into the power terminal, and the other end of which is connected to an external test power source.

[0013] Furthermore, a handle is provided on the top of the outer casing, and the outer casing is fixedly connected to the rear plate by bolts, with the bolt connection holes having inner metal threads.

[0014] Furthermore, the rear panel is provided with an openable battery cover corresponding to the position of the battery compartment, the battery cover being used to replace the battery without disassembling the rear panel.

[0015] Furthermore, the bottom of the outer casing is provided with multiple glue stack support feet, which are fixed to the rear plate or the bottom of the outer casing to support the calibration device and prevent the rear plate from directly contacting and rubbing against the workbench surface.

[0016] According to an embodiment of the present invention, a relay detection and verification method is provided, comprising: Insert the relay to be tested into the socket group of the base; Turn on the battery switch and observe whether all the LEDs corresponding to the normally closed nodes are lit. If the LED corresponding to a normally closed node is not lit, it is determined that there is a fault in the normally closed node circuit. Press the power test button to connect the external test power supply to the relay coil. The relay will be energized and the nodes will switch. At this time, observe whether all the LEDs corresponding to the normally open nodes are lit. If the LED corresponding to a normally open node is not lit, it is determined that there is a fault in the normally open node circuit. Release the power test button. The relay coil will be de-energized and the node will reset. Observe again whether the LED corresponding to the normally closed node will light up again. If it does, the coil and mechanical parts are normal. If the relay does not operate when the power test button is pressed, remove the relay and measure its coil resistance. If the coil resistance is abnormal, the coil is damaged. If the coil resistance is normal, the mechanical part of the relay is stuck.

[0017] This invention uses an LED array to visually display the on / off status of each node of the relay, eliminating the need for individual multimeter measurements. A single person can quickly complete the calibration, significantly improving testing efficiency. Simultaneously, the coil power supply circuit is integrated inside the device, using plug-in power terminals and a self-resetting button to control excitation. The conductive parts are completely enclosed, eliminating the risks of electric shock and short circuits associated with traditional temporary wiring, significantly improving operational safety. Furthermore, the device is compact and portable, with the circuit board and base detachably connected via pluggable terminals, facilitating adaptation and modification to different relay models. It is highly versatile and easy to maintain.

[0018] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of the relay detection and verification device according to an embodiment of the present invention; Figure 2 This is a front view of the circuit board of the relay detection and verification device according to an embodiment of the present invention; Figure 3 This is a rear 45-degree view of the relay detection and verification device according to an embodiment of the present invention; Figure 4 This is a rear view of the circuit board of the relay detection and verification device according to an embodiment of the present invention; Figure 5 These are the rear view and inner view of the rear plate of the relay detection and verification device according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the circuit board connection according to an embodiment of the present invention; Figure 7 This is a comparison diagram of the base number and diode display in an embodiment of the present invention; Figure 8 This is an overall effect diagram of the relay verification device according to an embodiment of the present invention; Figure 9 This is a flowchart of the relay detection and verification method according to an embodiment of the present invention; Reference numerals: 1-Outer casing; 2-Diode indicator hole; 3-Battery switch hole; 4-Base mounting hole; 5-Power terminal; 6-Power test button; 7-Handle; 8-Light emitting diode; 9-Battery switch; 10-Rear plate mounting hole; 11-Lead wire; 12-Battery; 13-Battery switch solder joint; 14-Diode solder joint; 15-Circuit board mounting hole; 16-Pluggable terminal block. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0022] Device Examples According to an embodiment of the present invention, a relay detection and verification device is provided. Figure 1 This is a schematic diagram of a relay detection and verification device according to an embodiment of the present invention, as shown below. Figure 1 As shown, the relay testing and verification device according to an embodiment of the present invention specifically includes: a housing 1, a base, a circuit board, a rear plate, and a power test button 6.

[0023] In this embodiment of the invention, the outer casing 1 has a rectangular parallelepiped structure, is made of plastic, and has a front, a back, and an internal accommodating space. A handle 7 is provided on the top of the outer casing 1, and the handle 7 is fixedly connected to the outer casing 1 by bolts. A battery switch hole 3 is provided at the upper left corner of the front of the outer casing 1, and the position of the battery switch hole 3 corresponds to the battery switch 9 on the circuit board, for the battery switch 9 to extend out.

[0024] Furthermore, a square base mounting hole is provided in the center of the front of the outer casing 1. The base is inserted into the base mounting hole from front to back and fixed to the panel of the outer casing 1 with screws. Multiple base fixing holes 4 are provided around the base mounting hole on the front of the outer casing 1. These base fixing holes 4 are used for screws to pass through and fix the base to the outer casing 1. On the left and right sides of the base mounting hole, four diode indicator light holes 2 are provided on each side of the outer casing 1, for a total of eight diode indicator light holes 2. The positions of these diode indicator light holes 2 correspond to the eight light-emitting diodes 8 on the circuit board, allowing the light-emitting end face of the LEDs to protrude and be exposed on the front of the outer casing 1.

[0025] Furthermore, the eight diode indicator light holes 2 are symmetrically arranged on both sides of the base, and the diameter of each diode indicator light hole 2 is larger than the outer diameter of the light-emitting diode 8. Two power terminal holes and one test button hole are provided at the bottom of the housing 1. The power terminal holes are used to install the power terminal 5, and the test button hole is used to install the power test button 6.

[0026] Furthermore, a power test button hole is provided in the lower right corner of the outer casing 1, and the power test button 6 is installed therein. The power test button 6 is a self-resetting normally open button, which is normally in the off state. When pressed, it is turned on, and when released, it automatically returns to the off state. The pressing end face of the power test button 6 is higher than the front surface of the outer casing 1.

[0027] Furthermore, the bottom of the outer casing 1 is provided with multiple rubber support feet, which are made of elastic rubber material and are fixedly connected to the back plate or the bottom of the outer casing 1 by screws. These feet are used to support the calibration device and maintain a certain gap between the back plate and the worktable. All the connection holes used for fixing bolts are provided with internal metal threads.

[0028] In this embodiment of the invention, the base is fixedly installed in the base mounting hole on the front of the housing 1 for inserting the test relay.

[0029] Furthermore, in this embodiment of the invention, the base is a standard base for the DZ-3E type relay, which is compatible with bases for various relay models. The base has a set of sockets corresponding to the relay pins, including coil sockets and junction sockets. The DZ-3E type relay has a pin-type output structure, while the base has a socket-type structure, with each socket corresponding to one of the relay pins. The relay has two positioning rods, and the base has two corresponding positioning holes. The positioning rods are inserted into the positioning holes to prevent the relay from being inserted incorrectly.

[0030] Furthermore, the back of the base has lead wires for connecting the base's sockets to external circuitry. (Combined) Figure 7 As shown, the socket numbers on the base correspond one-to-one with the relay nodes. Among them, 1-11, 2-22, 3-33, and 4-44 correspond to four pairs of normally open nodes, 5-55, 6-66, 7-77, and 8-88 correspond to four pairs of normally closed nodes, and 0 and 00 correspond to the coil.

[0031] Furthermore, the base has internal short-circuit circuits that short-circuit the first ends of multiple normally open nodes together and short-circuit the first ends of multiple normally closed nodes together. Taking the DZ-3E / 44 model as an example, the sockets 11, 33, 55, and 77 on the base are connected together with wires so that the number of leads on the back of the base matches the number of relay node pairs, reducing wiring complexity.

[0032] like Figure 2 As shown, the circuit board is placed inside the housing 1 with its front facing the front of the housing 1 and inserted from the back of the housing 1. There are 4 light-emitting diodes 8 on each of the left and right sides of the circuit board, for a total of 8 light-emitting diodes 8. After the circuit board is placed in the housing 1, these 8 light-emitting diodes 8 are inserted into the 8 diode indicator holes 2 on the front of the housing 1, so that the light-emitting end face of the light-emitting diodes 8 is exposed on the front of the housing 1.

[0033] Furthermore, the eight LEDs correspond to the eight pairs of nodes in the relay, combined with... Figure 7 As shown, the on / off status of each node is indicated one-to-one. A battery switch 9 is provided in the upper left corner of the front of the circuit board. After the circuit board is placed into the housing 1, the battery switch 9 is inserted into the battery opening hole 3 on the front of the housing 1.

[0034] Furthermore, a square hole is provided in the middle of the circuit board, the size of which is larger than the outer dimensions of the base, to provide installation space for the base. A notch is provided at the bottom of the circuit board, the position of which corresponds to the power terminal 5 and power test button 6 on the bottom of the housing 1, to provide installation space for the power terminal 5 and power test button 6. The circuit board also has multiple circuit board fixing holes 15, which are used for screws to pass through and fix the circuit board inside the housing 1.

[0035] like Figure 4 As shown, the back of the circuit board has a printed circuit board with conductive lines for the battery power supply circuit. The circuit board has battery mounting positions for two AA batteries to power the LED 8. The circuit board is detachably electrically connected to the leads on the back of the base via two pluggable terminals 16. The male connector of the pluggable terminal 16 is fixed to the circuit board, while the leads on the back of the base connect to the female connector of the pluggable terminal 16, which is the movable connector. The female connector is inserted into the male connector to establish the electrical connection. The pluggable terminal 16 is a KF2EDGV type with one fixed end. The advantage of using pluggable terminals 16 is that when the circuit board needs to be replaced or repaired, the circuit board can be removed from the housing 1 simply by unplugging the female connector from the male connector, without the need for soldering or disconnecting wires.

[0036] Combination Figure 4 and Figure 6As shown, the specific connection method of the printed circuit on the back of the circuit board is as follows: The negative terminal of battery 12 is connected to the corresponding pin of the male pluggable terminal block 16 through the printed circuit, and then connected to the lead wire on the back of the base through the female pluggable terminal block 16. Inside the base, the first ends of the four pairs of normally open contacts are shorted together by wires, and the first ends of the four pairs of normally closed contacts are also shorted together by wires. Through the relay contacts, the output is output from the corresponding socket of the base, and then returns to the male pluggable terminal block 16 of the circuit board through the female pluggable terminal block 16. After returning to the circuit board, it passes through the diode solder joints 14 of the eight LEDs 8. Each LED 8 is connected in series with a current-limiting resistor to limit the current flowing through the LED 8 and prevent the LED 8 from burning out due to excessive current. After passing through the LEDs 8 and the current-limiting resistors, the lines converge and then return to the positive terminal of battery 12 through the solder joint of battery switch 9. When the battery switch 9 is turned on and the relay is inserted into the base, if a node of the relay is in the ON state, the corresponding LED 8 forms a complete power-carrying circuit and the LED 8 lights up; if the node is in the OFF state, the circuit is not open and the LED 8 does not light up. Taking the right side as an example, the negative terminal of the battery is connected to the male pluggable terminal through the printed circuit, and then connected to the socket 11 of the base through the female pluggable terminal. Sockets 11, 33, 55, and 77 on the base are connected together with wires. Through the relay node, the output is from the corresponding sockets 1, 3, 5, and 7 on the base, and returns to the circuit board through the pluggable terminal. They are then connected together through four diode solder points 14, and return to the positive terminal of the battery through the battery switch solder point 13. The principle on the left side is the same.

[0037] like Figure 3As shown, power terminal 5 is located in the power terminal hole at the bottom of the outer casing 1, used for connecting an external test power supply. Power terminal 5 is a banana terminal, with a hollow copper material structure and an outer insulating plastic layer. Power terminal 5 is equipped with a dedicated test connector; the male end of the test connector is inserted into the hollow hole of power terminal 5, and the other end is connected to the external test power supply. The two power terminals 5 correspond to the positive and negative terminals of the power supply, respectively. Inside the device, the rear end of the first power terminal 5 is electrically connected to the first end of the coil of the base via a lead wire, and the rear end of the second power terminal 5 is connected to one end of the power test button 6 via a lead wire 11. The other end of the power test button 6 is connected to the second end of the coil of the base via a lead wire 11. That is, the coil socket 00 of the base is connected to power terminal 5, and the coil socket 0 is connected to power test button 6. All the above lead wire 11 connections adopt a plug-in method, that is, the end of the lead wire 11 is provided with a plug-in terminal, which is plugged into the corresponding interface of power terminal 5 and power test button 6 to facilitate the disassembly and maintenance of the circuit board. When the external test power supply is connected to the two power terminals 5, pressing the power test button 6 will supply test power to the coil in the base via the power terminals 5 and the power test button 6, energizing the relay coil. Releasing the power test button 6 will automatically reset and disconnect the relay coil, de-energizing it and restoring the junction to its initial state. Because the conductive parts of the power terminals 5 are completely enclosed inside the terminals, the conductive parts are not exposed after the test wire is inserted, eliminating the risk of electric shock to the operator. Furthermore, the test wire and the power terminals 5 are connected by a plug-in joint, ensuring a secure connection and preventing accidental detachment, thus avoiding the risk of short circuits.

[0038] like Figure 5 As shown, after the circuit board is placed in the housing 1, the back is sealed with a rear panel. The rear panel is fixed to the back of the housing 1 to seal the internal accommodating space of the housing 1. The rear panel has multiple rear panel fixing holes 10 for screws to pass through and fix the rear panel to the housing 1. A battery compartment is provided on the side of the rear panel facing the circuit board. When the rear panel is closed, the battery compartment neatly surrounds the battery on the circuit board, preventing the battery from moving or falling off. After the rear panel is closed, the rubber stack support feet are fixed to the housing 1 together with the rear panel using screws. The rear panel has an openable battery cover corresponding to the position of the battery compartment. When it is necessary to replace the battery, the battery can be directly removed and inserted by opening the battery cover without disassembling the rear panel.

[0039] like Figure 8 As shown, after the device is assembled, it presents itself as a small box-like structure with a handle 7.

[0040] The following is a detailed explanation of the use of this device through a specific example. Taking the DZ-3E / 44 type relay as an example for testing and verification, this relay has four pairs of normally open contacts (1-11, 2-22, 3-33, 4-44) and four pairs of normally closed contacts (5-55, 6-66, 7-77, 8-88), and the rated voltage of the coil is 220 volts DC.

[0041] First, align the relay under test with the positioning hole on the base and insert it, ensuring that the relay pins are fully aligned with the base sockets. Then, insert the dedicated test lead into the power terminal 5 of the device, connecting the other end of the test lead to a 220V DC test power supply.

[0042] Turn on the battery switch 9. At this time, the relay coil is not yet energized, the normally closed contact is in the on state, and the normally open contact is in the off state. Under normal circumstances, all the LEDs 8 (5-55, 6-66, 7-77, 8-88) corresponding to the four pairs of normally closed contacts on the test device panel should be lit, and all the LEDs 8 (1-11, 2-22, 3-33, 4-44) corresponding to the four pairs of normally open contacts should be off.

[0043] If the LED 8 corresponding to a normally closed node does not light up, it indicates that the circuit of that normally closed node is not open, indicating poor contact or internal open circuit fault; if the LED 8 corresponding to a normally open node lights up, it indicates that the normally open node has a sticking or short circuit fault.

[0044] Then press the power test button 6, the relay coil is energized, and all nodes switch - normally closed nodes open and normally open nodes close. At this time, the on / off state of LEDs 8 on the panel should be completely reversed, that is, all LEDs 8 corresponding to the four normally closed nodes that were originally lit are off, and all LEDs 8 corresponding to the four normally open nodes that were originally off are lit.

[0045] If the LED 8 corresponding to a normally open node does not light up after the conversion, it means that the normally open node failed to close reliably under the energized state; if the LED 8 corresponding to a normally closed node still lights up, it means that the normally closed node failed to open reliably under the energized state.

[0046] Release the power test button 6. The relay coil will be de-energized, all nodes will reset, and the LED 8 should return to its initial state. If pressing the power test button 6 does not change the state of any LED 8 and no relay click is heard, it indicates that the relay coil is not energized or is damaged. In this case, remove the relay from the base and use a multimeter to measure the resistance between the coil pins 0 and 00. The normal value is usually around several thousand ohms to ten thousand ohms (the specific value depends on the number of coil turns and wire diameter, and should be based on the factory parameters of the relay model). If the measured resistance value is much greater than or much less than the normal range, the coil is damaged and a new relay needs to be replaced. If the resistance value is normal, the mechanical transmission part of the relay has a jamming fault and needs to be repaired or replaced.

[0047] If the laboratory lacks a test power supply with the same voltage level as the relay coil, the calibration device can be taken to the equipment site and the working power supply of the relay circuit can be directly connected to power terminal 5 for testing. If an external test power supply cannot be connected on-site for some reason, the relay casing can be opened, and the relay's activation mechanism can be manually pressed to simulate excitation. Similarly, the continuity of each node can be determined by observing the on / off changes of the LEDs 8. Then, by using a multimeter to measure the coil resistance, the relay testing and calibration can be completed. The entire testing process does not require measuring the continuity of all 8 pairs of nodes point by point with a multimeter; simply observing the on / off state and switching of the 8 LEDs 8 at once is sufficient to quickly, intuitively, and accurately complete the calibration of all nodes.

[0048] This invention uses an array of 8 LEDs to visually display the on / off status of each node of the relay, eliminating the need for individual multimeter measurements. A single person can quickly complete the calibration, significantly improving testing efficiency. Simultaneously, the coil power supply circuit is integrated inside the device, using a plug-in power terminal 5 and a self-resetting button to control excitation. The conductive parts are completely enclosed, eliminating the risks of electric shock and short circuits associated with traditional temporary wiring, significantly improving operational safety. Furthermore, the device is compact and portable, with the circuit board and base detachably connected via pluggable terminals, facilitating adaptation and modification to different relay models. It is highly versatile and easy to maintain.

[0049] Method Implementation Examples According to an embodiment of the present invention, a relay detection and verification method is provided. Figure 9 This is a flowchart of the relay detection and verification method according to an embodiment of the present invention, as follows: Figure 9 As shown, the relay detection and verification method according to an embodiment of the present invention specifically includes: S901. Insert the relay to be tested into the socket group of the base; S902. Turn on the battery switch and observe whether all the LEDs corresponding to the normally closed nodes are lit. If the LED corresponding to a normally closed node is not lit, it is determined that there is a fault in the normally closed node circuit. S903. Press the power test button to connect the external test power supply to the relay coil. The relay is energized and the nodes are switched. At this time, observe whether all the LEDs corresponding to the normally open nodes are lit. If the LED corresponding to a normally open node is not lit, it is determined that there is a fault in the normally open node circuit. S904. Release the power test button. The relay coil is de-energized and the node is reset. Observe again whether the LED corresponding to the normally closed node lights up again. If it does, the coil and mechanical parts are normal. S905. If the relay does not operate when the power test button is pressed, remove the relay and measure its coil resistance. If the coil resistance is abnormal, the coil is damaged. If the coil resistance is normal, the mechanical part of the relay is stuck.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A relay detection and verification device, characterized in that, include: The housing has a front, a back and an internal accommodating space. The front has a base mounting hole, a diode indicator hole and a battery switch hole. The bottom has a power terminal hole and a test button hole. The base is fixedly installed in the base mounting hole on the front of the housing for inserting the test relay. The base is provided with a set of sockets corresponding to the relay pins. The set of sockets includes coil sockets and junction sockets. A circuit board is disposed inside the housing, with its front side facing the front of the housing. The circuit board is provided with a battery power supply circuit, multiple light-emitting diodes, a battery switch, and pluggable male terminals. The rear panel is fixed to the back of the outer casing and is used to close the internal accommodating space. The side of the rear panel facing the circuit board has a battery compartment for accommodating and limiting the battery on the circuit board. A power terminal is provided in a power terminal hole at the bottom of the housing for connecting an external test power source; A power test button is located in the test button hole at the bottom of the housing and is a self-resetting normally open button. The lead wires on the back of the base are detachably electrically connected to the pluggable terminal male on the circuit board via a female pluggable terminal. The first end of the power terminal is electrically connected to the first end of the coil of the base, and the second end of the power terminal is electrically connected to the second end of the coil of the base via the power test button, forming a relay coil power supply circuit; The battery power supply circuit is connected via the battery switch between the LED and the junction socket of the base, and is used to control the LED to turn on or off according to the on / off state of the relay junction.

2. The relay detection and verification device according to claim 1, characterized in that, The front of the housing has eight diode indicator light holes, which are symmetrically arranged on the left and right sides of the mounting hole on the base. Each diode indicator light hole contains a light-emitting diode, and the light-emitting end face of the light-emitting diode is exposed on the front of the housing.

3. The relay detection and verification device according to claim 1, characterized in that, The male plug-in terminal on the circuit board is a fixed end, located on the back of the circuit board. The lead wire on the back of the base is connected to the female plug-in terminal. The female end is a movable end, and it is plugged into the male end during use.

4. The relay detection and verification device according to claim 1, characterized in that, The circuit board has printed lines for the positive and negative terminals of the battery. The negative terminal of the battery is connected to the corresponding pin of the pluggable terminal block through the printed lines, and then returns to the anode of the light-emitting diode through the base and relay node. The cathode of the light-emitting diode is connected to the positive terminal of the battery through the printed lines and the battery switch.

5. The relay detection and verification device according to claim 1, characterized in that, The base has a node shorting circuit inside, which shorts the first ends of multiple normally open nodes together and shorts the first ends of multiple normally closed nodes together, so that the number of leads on the back of the base matches the number of relay node pairs.

6. The relay detection and verification device according to claim 1, characterized in that, The power terminal is a banana terminal, which has a hollow copper structure and is covered with an insulating layer. The power terminal is equipped with a test connector, the male end of which is inserted into the power terminal, and the other end of which is connected to an external test power source.

7. The relay detection and verification device according to claim 1, characterized in that, The outer casing is provided with a handle on the top, and the outer casing is fixedly connected to the rear plate by bolts, with the bolt connection holes having inner metal threads.

8. The relay detection and verification device according to claim 1, characterized in that, The rear panel is provided with an openable battery cover corresponding to the position of the battery compartment. The battery cover is used to replace the battery without removing the rear panel.

9. The relay detection and verification device according to claim 1, characterized in that, The bottom of the outer casing is provided with multiple glue stacking feet, which are fixed to the rear plate or the bottom of the outer casing to support the calibration device and prevent the rear plate from directly contacting and rubbing against the workbench surface.

10. A method for performing relay testing and verification using the relay testing and verification device according to any one of claims 1 to 9, characterized in that, Includes the following steps: Insert the relay to be tested into the socket group of the base; Turn on the battery switch and observe whether all the LEDs corresponding to the normally closed nodes are lit. If the LED corresponding to a normally closed node is not lit, it is determined that there is a fault in the normally closed node circuit. Press the power test button to connect the external test power supply to the relay coil. The relay will be energized and the nodes will switch. At this time, observe whether all the LEDs corresponding to the normally open nodes are lit. If the LED corresponding to a normally open node is not lit, it is determined that there is a fault in the normally open node circuit. Release the power test button. The relay coil will be de-energized and the node will reset. Observe again whether the LED corresponding to the normally closed node will light up again. If it does, the coil and mechanical parts are normal. If the relay does not operate when the power test button is pressed, remove the relay and measure its coil resistance. If the coil resistance is abnormal, the coil is damaged. If the coil resistance is normal, the mechanical part of the relay is stuck.

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