A relay test device and a tester

Abstract

A relay test device and a tester, comprising an energy storage module, a voltage inverter conversion module, a switch selection module and a switch module; the energy storage module stores electric energy and outputs a battery power supply, the voltage inverter conversion module performs inverter conversion on the battery power supply to generate a plurality of driving power supplies, the switch selection module generates a key selection signal according to user input, and the switch module connects at least one driving power supply according to the key selection signal; thereby realizing the output of a plurality of driving power supplies, and selecting and connecting the corresponding driving power supply to the relay to be tested according to the test requirements, enabling the simultaneous testing of multiple relays, improving the relay test operation efficiency, avoiding the need to replace different external power supplies when testing different relays, reducing the input of manpower and material resources, being convenient to move and operate the test device, having high test reliability and practicability, and improving the safety of using electricity for testing relays.

Description

Technical Field

[0001] The invention belongs to the technical field of maintenance equipment for nuclear power plants, and particularly relates to a relay test device and a tester. Background Art

[0002] At present, during the nuclear power plant maintenance process, there are many operations for testing relays. Especially when inspecting each control loop, a large number of relays need to be tested. The commonly used relays include coils with different rated voltage specifications such as AC 220V, DC 110V, DC 48V, DC 24V, and DC 12V. Different power supplies are required to test relays with different rated voltage specifications.

[0003] One traditional method for testing relays is to use power supplies with different voltage levels such as AC 220V, DC 110V, DC 48V, DC 24V, and DC 12V to test relays with different rated voltages. However, this method requires multiple power supplies, and all of them need a cable reel to obtain power from the plant maintenance power socket, resulting in a large number of tools used for the relay testing operation and a large amount of human and material resources invested. Another method for testing relays is to use the characteristics of a single-phase relay protection tester that can externally provide different levels of voltage such as AC 220V, DC 110V, DC 48V, DC 24V, and DC 12V to test relays with different rated voltages. Since the single-phase relay protection tester is not a dedicated tool for testing relays, when using the single-phase relay protection tester to test relays, a cable reel is also needed to draw power from the plant maintenance power socket for the single-phase relay protection tester to use. One operator operates the single-phase relay protection tester to output the required voltage, and another operator connects the lead-out wire of the single-phase relay protection tester to the relay to be tested to supply power to the relay for testing. However, for this method, each time a relay is tested, the cable led out from the single-phase relay protection instrument needs to be connected to the relay once, and there are many relays to be tested in each control loop, resulting in low efficiency and long time for the relay testing operation. Moreover, the single-phase relay protection instrument is large in size and heavy in weight, making it inconvenient to move the single-phase relay protection instrument during the operation. Moving it will consume a large amount of manpower and time, and there are various unknown risks during this period.

[0004] Therefore, the traditional technical solutions have problems such as a serious dependence on external power supplies during on-site relay testing, high on-site power consumption risks, low efficiency and long time for relay testing operations, inconvenient operation of testing equipment, low testing reliability, and large consumption of human and material resources. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a relay test device and a tester, aiming to solve the problems existing in the traditional technical solutions, such as severe dependence on external power sources during on-site relay testing, high on-site power consumption risks, low efficiency and long time for relay testing operations, inconvenient operation of testing equipment, low testing reliability, and high consumption of human and material resources.

[0006] In a first aspect of embodiments of the present invention, a relay test device is provided. The relay test device includes:

[0007] An energy storage module for storing electric energy and outputting a battery power supply;

[0008] A voltage inversion conversion module connected to the energy storage module for inverting and converting the battery power supply to generate multiple drive power supplies;

[0009] A switch selection module connected to the voltage inversion conversion module for generating a key selection signal according to user input;

[0010] A switch module connected to the switch selection module and the voltage inversion conversion module for connecting at least one of the drive power supplies according to the key selection signal.

[0011] In one embodiment, the relay test device further includes:

[0012] A step-down rectification module for generating a charging power supply according to an input AC power supply;

[0013] The energy storage module is used for charging and storing energy according to the charging power supply and outputting the battery power supply.

[0014] In one embodiment, the relay test device further includes:

[0015] A test interface module connected to the switch module for forwarding the drive power supply.

[0016] In one embodiment, the step-down rectification module includes:

[0017] A first protection unit for overcurrent protection and short-circuit protection of the input AC power supply;

[0018] A first voltage conversion unit connected to the first protection unit for voltage conversion of the input AC power supply to generate a first power supply;

[0019] A rectification unit connected to the first voltage conversion unit for rectifying the first power supply to generate a rectified power supply;

[0020] Connected to the rectification unit, a first filtering unit for filtering and noise reduction of the rectified power supply to generate the charging power supply.

[0021] In one embodiment, the energy storage module includes:

[0022] A battery unit for storing electrical energy according to the charging power supply and outputting a battery power supply;

[0023] A battery protection unit connected to the battery unit for overcharge protection and over-discharge protection of the charging power supply and the battery power supply;

[0024] An anti-reverse connection unit connected to the battery protection unit and the buck rectification module for preventing reverse connection and backflow of the battery power supply;

[0025] A key unit connected to the anti-reverse connection unit and the battery protection unit for connecting or disconnecting the battery power supply according to user input.

[0026] In one embodiment, the voltage inversion conversion module includes:

[0027] An energy storage unit for energy storage according to the battery power supply;

[0028] An inverter drive unit connected to the energy storage unit for generating a drive signal according to the battery power supply;

[0029] A voltage inversion conversion unit connected to the inverter drive unit for voltage inversion conversion of the battery power supply according to the drive signal to generate the plurality of drive power supplies.

[0030] In one embodiment, the voltage inversion conversion unit includes a first resistor, a first triode, a second triode, a multi-tap transformer, a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor;

[0031] The first end of the first resistor is the battery power supply input end of the voltage inversion conversion unit;

[0032] The second end of the first resistor is connected to the second end of the first primary winding of the multi-tap transformer and the first end of the second primary winding of the multi-tap transformer. The collector of the first triode is connected to the first end of the first primary winding of the multi-tap transformer. The second end of the second primary winding of the multi-tap transformer is connected to the collector of the second triode. The emitters of the first triode and the second triode are connected to the power ground. The second end of the first secondary winding of the multi-tap transformer is connected to the first end of the second secondary winding of the multi-tap transformer and the anode of the first diode. The cathode of the first diode is connected to the first end of the first capacitor. The second end of the first capacitor is connected to the power ground. The second end of the second secondary winding of the multi-tap transformer is connected to the anode of the second diode and the first end of the third secondary winding of the multi-tap transformer. The cathode of the second diode and the first end of the second capacitor are connected. The second end of the second capacitor is connected to the power ground. The second end of the third secondary winding of the multi-tap transformer is connected to the anode of the third diode and the first end of the fourth secondary winding of the multi-tap transformer. The cathode of the third diode and the first end of the third capacitor are connected. The second end of the third capacitor is connected to the power ground. The second end of the fourth secondary winding of the multi-tap transformer is connected to the anode of the fourth diode and the first end of the fifth secondary winding of the multi-tap transformer. The cathode of the fourth diode and the first end of the fourth capacitor are connected. The second end of the fourth capacitor is connected to the power ground. The second end of the fifth secondary winding of the multi-tap transformer is connected to the power ground;

[0033] The first end of the first secondary winding of the multi-tap transformer is the first drive power output terminal of the voltage inversion conversion unit;

[0034] The first end of the first capacitor is the second drive power output terminal of the voltage inversion conversion unit;

[0035] The first end of the second capacitor is the third drive power output terminal of the voltage inversion conversion unit;

[0036] The first end of the third capacitor is the fourth drive power output terminal of the voltage inversion conversion unit;

[0037] The first end of the fourth capacitor is the fifth drive power output terminal of the voltage inversion conversion unit;

[0038] The bases of the first triode and the second triode together constitute the drive signal input terminal of the voltage inversion conversion unit.

[0039] In one embodiment, the switch selection module includes a multi-position selection switch;

[0040] The first gear output terminal of the multi-gear selection switch is the first key selection signal output terminal of the switch selection module;

[0041] The second gear output terminal of the multi-gear selection switch is the second key selection signal output terminal of the switch selection module;

[0042] The third gear output terminal of the multi-gear selection switch is the third key selection signal output terminal of the switch selection module;

[0043] The fourth gear output terminal of the multi-gear selection switch is the fourth key selection signal output terminal of the switch selection module;

[0044] The fifth gear output terminal of the multi-gear selection switch is the fifth key selection signal output terminal of the switch selection module;

[0045] The key selection signals include the first key selection signal, the second key selection signal, the third key selection signal, the fourth key selection signal, and the fifth key selection signal.

[0046] In one embodiment, the switch module includes a first relay, a second relay, a third relay, a fourth relay, and a fifth relay;

[0047] The first ends of the coils of the first relay, the second relay, the third relay, the fourth relay, and the fifth relay are connected to a fifth drive power supply;

[0048] The second ends of the coils of the first relay, the second relay, the third relay, the fourth relay, and the fifth relay are connected to the power ground;

[0049] The first end of the normally open contact of the first relay is the first drive power input terminal of the switch module; the first end of the normally open contact of the second relay is the second drive power input terminal of the switch module; the first end of the normally open contact of the third relay is the third drive power input terminal of the switch module; the first end of the normally open contact of the fourth relay is the fourth drive power input terminal of the switch module; the first end of the normally open contact of the fifth relay is the fifth drive power input terminal of the switch module;

[0050] The second terminal of the normally open contact of the first relay is the first drive power output terminal of the switch module; the second terminal of the normally open contact of the second relay is the second drive power output terminal of the switch module; the second terminal of the normally open contact of the third relay is the third drive power output terminal of the switch module; the second terminal of the normally open contact of the fourth relay is the fourth drive power output terminal of the switch module; the second terminal of the normally open contact of the fifth relay is the fifth drive power output terminal of the switch module.

[0051] In a second aspect of the embodiments of the present invention, a relay tester is provided. The relay tester includes a box body and the relay test device as described above.

[0052] In the embodiments of the present invention, the energy storage module stores electric energy and outputs a battery power supply. The voltage inversion conversion module performs inversion conversion on the battery power supply to generate multiple drive power supplies. The switch selection module generates a key selection signal according to user input, and the switch module connects at least one drive power supply according to the key selection signal; thereby realizing the output of multiple drive power supplies, and selecting and connecting the corresponding drive power supply to the relay to be tested according to the test requirements, achieving the purpose of testing multiple relays simultaneously, improving the efficiency of relay test operations, avoiding the need to replace different external power supplies when testing different relays, reducing the input of manpower and material resources, being convenient for moving and operating the test device, having high test reliability and practicability, and reducing the power consumption risk during long-term on-site test operations relying on external power supplies and multiple people. Description of the Drawings

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0054] Figure 1 It is a schematic structural diagram of a relay test device provided by an embodiment of the present invention;

[0055] Figure 2 It is another schematic structural diagram of a relay test device provided by an embodiment of the present invention;

[0056] Figure 3 It is another schematic structural diagram of a relay test device provided by an embodiment of the present invention;

[0057] Figure 4 It is a schematic structural diagram of a step-down rectification module provided by an embodiment of the present invention;

[0058] Figure 5A schematic structural diagram of an energy storage module provided by an embodiment of the present invention;

[0059] Figure 6 A schematic structural diagram of a voltage inversion conversion module provided by an embodiment of the present invention;

[0060] Figure 7 An example circuit schematic diagram of a relay test device provided by an embodiment of the present invention;

[0061] Figure 8 An external structural schematic diagram of a relay tester provided by an embodiment of the present invention. Detailed implementation manners

[0062] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0063] Please refer to Figure 1 , a schematic structural diagram of a relay test device provided by an embodiment of the present invention. For the convenience of description, only the parts related to this embodiment are shown and are described in detail as follows:

[0064] A relay test device includes an energy storage module 11, a voltage inversion conversion module 12, a switch selection module 13, and a switch module 14.

[0065] The energy storage module 11 is used to store electric energy and output a battery power supply; the voltage inversion conversion module 12 is connected to the energy storage module 11 and is used to perform inversion conversion on the battery power supply to generate a plurality of drive power supplies; the switch selection module 13 is connected to the voltage inversion conversion module 12 and is used to generate a key selection signal according to user input; the switch module 14 is connected to the switch selection module 13 and the voltage inversion conversion module 12 and is used to connect at least one drive power supply according to the key selection signal.

[0066] The embodiment of the present invention realizes outputting a plurality of drive power supplies through a built-in power supply and selecting to output a drive power supply to a relay test interface as needed, achieving the purpose of testing a plurality of relays simultaneously, improving the efficiency of relay test operations, avoiding the need to replace different external power supplies when testing different relays, reducing the input of manpower and material resources, the test equipment is easy to operate, the test reliability and practicability are high, and the power consumption risk during long-term on-site operations of multiple people relying on external power supplies is reduced.

[0067] Please refer to Figure 2 , in one embodiment, the relay test device further includes a step-down rectification module 10.

[0068] The step-down rectification module 10 is used to generate a charging power supply according to the input AC power supply; the energy storage module 11 is used to charge and store energy according to the charging power supply and output a battery power supply.

[0069] Please refer to Figure 4 , in one embodiment, the step-down rectification module 10 includes a first protection unit 101, a first voltage conversion unit 102, a rectification unit 103, and a first filtering unit 104.

[0070] The first protection unit 101 is used to perform overcurrent protection and short-circuit protection on the input AC power supply; the first voltage conversion unit 102 is connected to the first protection unit 101 and is used to convert the voltage of the input AC power supply to generate a first power supply; the rectification unit 103 is connected to the first voltage conversion unit 102 and is used to rectify the first power supply to generate a rectified power supply; the first filtering unit 104 is connected to the rectification unit 103 and is used to filter and reduce noise of the rectified power supply to generate a charging power supply.

[0071] In specific implementation, the step-down rectification module 10 can isolate, step down, rectify, and filter the 220V input AC power supply to generate a low-voltage stable DC charging power supply. The energy storage module 11 charges and stores energy according to the charging power supply, avoiding the electrical risk brought by the operator directly using the 220V AC power supply. At the same time, it also reduces the dependence on the external power supply, making the device easy to move and carry, reducing the consumption of manpower and material resources during relay testing, and improving the practicability, portability, and reliability of the relay testing device.

[0072] Please refer to Figure 3 , in one embodiment, the relay testing device further includes a test interface module 15.

[0073] The test interface module 15 is connected to the switch module 14 and is used to forward the driving power supply.

[0074] In specific implementation, the test interface module 15 may be correspondingly installed with a relay test socket. Multiple driving power supplies are connected to the test interface module 15. Different driving power supplies are connected according to the key selection signal, and the driving power supply is forwarded by the test interface module 15 to multiple relays to be tested for testing, improving the test efficiency and reducing the test working time.

[0075] Please refer to Figure 5 , in one embodiment, the energy storage module 11 includes an anti-reverse connection unit 111, a battery protection unit 112, a battery unit 113, and a key unit 114.

[0076] The battery unit 113 is used to store electrical energy according to a charging power source and output a battery power source; the battery protection unit 112 is connected to the battery unit 113 and is used to perform overcharge protection and over-discharge protection on the charging power source and the battery power source; the reverse connection prevention unit 111 is connected to the battery protection unit 112 and the step-down rectification module 10 and is used to prevent the reverse connection and backflow of the battery power source; the key unit 114 is connected to the reverse connection prevention unit 111 and the battery protection unit 112 and is used to connect or disconnect the battery power source according to user input.

[0077] In specific implementation, the battery unit 113 includes a storage battery. Optionally, the storage battery is a maintenance-free battery with a voltage level of 12 VDC and a capacity of 7 AH, which can meet the power consumption requirements for outdoor relay testing, and has high battery performance, long service life, no pollution, and is safe and reliable. Through the battery protection unit 112, the voltage of the battery can be monitored in real time, and the charging power source can be disconnected according to the voltage of the battery during the charging process. During the discharge process of the battery, the battery power source can be disconnected according to the voltage of the battery, realizing overcharge protection and over-discharge protection of the battery and protecting the service life of the battery. The reverse connection prevention unit 111 prevents the reverse connection and backflow of the battery power source. The key unit 114 can disconnect the battery power source when relay testing operations are not required and connect the battery power source when relay testing operations are required, further improving the safety and reliability of the built-in power source of the relay testing device and facilitating the improvement of the test work efficiency of the testing device.

[0078] Please refer to Figure 6 , in one of the embodiments, the voltage inverter conversion module 12 includes an energy storage unit 121, an inverter drive unit 122, and a voltage inverter conversion unit 123.

[0079] The energy storage unit 121 is used to store energy according to the battery power source; the inverter drive unit 122 is connected to the energy storage unit 121 and is used to generate a drive signal according to the battery power source; the voltage inverter conversion unit 123 is connected to the inverter drive unit 122 and is used to perform voltage inverter conversion on the battery power source according to the drive signal to generate a plurality of drive power sources.

[0080] In specific implementation, the energy storage unit 121 includes a super capacitor, which can store energy according to the battery power supply and filter and reduce noise of the battery power supply to smooth and stabilize the battery power supply input to the inverter driving unit 122. The inverter driving unit 122 generates a driving signal based on the battery power supply after filtering and noise reduction, improving the driving control accuracy of the inverter driving unit 122, and further improving the accuracy of the voltage inversion conversion unit 123 to perform voltage inversion conversion on the battery power supply according to the driving signal to generate multiple driving power supplies. Optionally, the inverter driving unit 122 includes a pure sine wave inverter generator chip, the driving signal includes a sine pulse width modulation signal, and the voltage inversion conversion unit 123 outputs voltages with different frequencies and amplitudes according to the sine pulse width modulation signal, and finally outputs multiple different driving power supplies after rectification and filtering.

[0081] Please refer to Figure 7 , in one of the embodiments, the voltage inversion conversion unit 123 includes a first resistor R1, a first triode Q1, a second triode Q2, a multi-tap transformer T2, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4.

[0082] The first end of the first resistor R1 is the battery power supply input end of the voltage inversion conversion unit 123.

[0083] The second terminal of the first resistor R1 is connected to the second terminal of the first primary winding Na1 of the multi-tap transformer T2 and the first terminal of the second primary winding Na2 of the multi-tap transformer T2. The collector of the first triode Q1 is connected to the first terminal of the first primary winding Na1 of the multi-tap transformer T2. The second terminal of the second primary winding Na2 of the multi-tap transformer T2 is connected to the collector of the second triode Q2. The emitters of the first triode Q1 and the second triode Q2 are connected to the power ground. The second terminal of the first secondary winding Nb1 of the multi-tap transformer T2 is connected to the first terminal of the second secondary winding Nb2 of the multi-tap transformer T2 and the anode of the first diode D1. The cathode of the first diode D1 is connected to the first terminal of the first capacitor C1. The second terminal of the first capacitor C1 is connected to the power ground. The second terminal of the second secondary winding Nb2 of the multi-tap transformer T2 is connected to the anode of the second diode D2 and the first terminal of the third secondary winding Nb3 of the multi-tap transformer T2. The cathode of the second diode D2 and the first terminal of the second capacitor C2 are connected. The second terminal of the second capacitor C2 is connected to the power ground. The second terminal of the third secondary winding Nb3 of the multi-tap transformer T2 is connected to the anode of the third diode D3 and the first terminal of the fourth secondary winding Nb4 of the multi-tap transformer T2. The cathode of the third diode D3 and the first terminal of the third capacitor C3 are connected. The second terminal of the third capacitor C3 is connected to the power ground. The second terminal of the fourth secondary winding Nb4 of the multi-tap transformer T2 is connected to the anode of the fourth diode and the first terminal of the fifth secondary winding Nb5 of the multi-tap transformer T2. The cathode of the fourth diode D4 and the first terminal of the fourth capacitor C4 are connected. The second terminal of the fourth capacitor C4 is connected to the power ground. The second terminal of the fifth secondary winding Nb5 of the multi-tap transformer T2 is connected to the power ground.

[0084] The first terminal of the first secondary winding Nb1 of the multi-tap transformer T2 is the first drive power output terminal of the voltage inversion conversion unit 123.

[0085] The first terminal of the first capacitor C1 is the second drive power output terminal of the voltage inversion conversion unit 123.

[0086] The first terminal of the second capacitor C2 is the third drive power output terminal of the voltage inversion conversion unit 123.

[0087] The first terminal of the third capacitor C3 is the fourth drive power output terminal of the voltage inversion conversion unit 123.

[0088] The first terminal of the fourth capacitor C4 is the fifth drive power output terminal of the voltage inversion conversion unit 123.

[0089] The bases of the first triode Q1 and the second triode Q2 together constitute the drive signal input terminal of the voltage inversion conversion unit 123.

[0090] In specific implementation, the first end of the third resistor R3 is connected to the first end of the fourth capacitor C4 and the cathode of the fourth diode D4. The second end of the third resistor R3 is connected to the anode of the first light-emitting diode D13, and the cathode of the first light-emitting diode D13 is connected to the power ground. The first light-emitting diode D13 is used to indicate that the device is in the detection working state. The third resistor R3 is a current-limiting resistor to prevent the current passing through the first light-emitting diode D13 from being too large and damaging it.

[0091] Optionally, the first driving power supply is a 220V AC power supply, the second driving power supply is a 110V DC power supply, the third driving power supply is a 48V DC power supply, the fourth driving power supply is a 24V DC power supply, and the fifth driving power supply is a 12V DC power supply. The first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 are rectifier diodes, and the first capacitor C1, the second capacitor C2, the third capacitor C3, and the fourth capacitor C4 are filter capacitors. The second driving power supply is rectified by the first diode D1, and the second driving power supply is filtered and noise-reduced by the first capacitor C1 to smooth and stabilize the second driving power supply; the third driving power supply is rectified by the second diode D2, and the third driving power supply is filtered and noise-reduced by the second capacitor C2 to smooth and stabilize the third driving power supply; the fourth driving power supply is rectified by the third diode D3, and the fourth driving power supply is filtered and noise-reduced by the third capacitor C3 to smooth and stabilize the fourth driving power supply; the fifth driving power supply is rectified by the fourth diode D4, and the fifth driving power supply is filtered and noise-reduced by the fourth capacitor C4 to smooth and stabilize the fifth driving power supply. The accuracy and reliability of multiple groups of driving power supplies are improved, thereby improving the efficiency, accuracy, and reliability of the device for testing relays with different rated voltage specifications.

[0092] Please refer to Figure 7 , in one of the embodiments, the switch selection module 13 includes a multi-position selection switch F2.

[0093] The first gear output terminal 1 of the multi-position selection switch F2 is the first key selection signal output terminal of the switch selection module 13; the second gear output terminal 2 of the multi-position selection switch F2 is the second key selection signal output terminal of the switch selection module 13; the third gear output terminal 3 of the multi-position selection switch F2 is the third key selection signal output terminal of the switch selection module 13; the fourth gear output terminal 4 of the multi-position selection switch F2 is the fourth key selection signal output terminal of the switch selection module 13; the fifth gear output terminal 5 of the multi-position selection switch F2 is the fifth key selection signal output terminal of the switch selection module 13.

[0094] In specific implementation, the optional multi-gear selection switch F2 is a 6-gear rotary switch. When the relay test device is powered off and not working, the multi-gear selection switch F2 is in the sixth gear (0), that is, in a state without output drive power, which improves the electrical safety of the device.

[0095] Please refer to Figure 7 , in one of the embodiments, the switch module 14 includes a first relay K1, a second relay K2, a third relay K3, a fourth relay K4, and a fifth relay K5.

[0096] The first end of the coil K1-1 of the first relay K1, the first end of the coil K2-1 of the second relay K2, the first end of the coil K3-1 of the third relay K3, the first end of the coil K4-1 of the fourth relay K4, and the first end of the coil K5-1 of the fifth relay K5 are connected to the fifth drive power supply.

[0097] The second end of the coil K1-1 of the first relay K1, the second end of the coil K2-1 of the second relay K2, the second end of the coil K3-1 of the third relay K3, the second end of the coil K4-1 of the fourth relay K4, and the second end of the coil K5-1 of the fifth relay K5 are connected to the power ground.

[0098] The first end of the normally open contact K1-2 of the first relay K1 is the first drive power input terminal of the switch module 14; the first end of the normally open contact K2-2 of the second relay K2 is the second drive power input terminal of the switch module 14; the first end of the normally open contact K3-2 of the third relay K3 is the third drive power input terminal of the switch module 14; the first end of the normally open contact K4-2 of the fourth relay K4 is the fourth drive power input terminal of the switch module 14; the first end of the normally open contact K5-2 of the fifth relay K5 is the fifth drive power input terminal of the switch module 14.

[0099] The second end of the normally open contact K1-2 of the first relay K1 is the first drive power output terminal of the switch module 14; the second end of the normally open contact K2-2 of the second relay K2 is the second drive power output terminal of the switch module 14; the second end of the normally open contact K3-2 of the third relay K3 is the third drive power output terminal of the switch module 14; the second end of the normally open contact K4-2 of the fourth relay K4 is the fourth drive power output terminal of the switch module 14; the second end of the normally open contact K5-2 of the fifth relay K5 is the fifth drive power output terminal of the switch module 14.

[0100] In specific implementation, light-emitting diodes can be connected in parallel at both ends of the coil of each relay to indicate the working state, and a current-limiting resistor can be connected in series at one end of the light-emitting diode to prevent the current flowing through the light-emitting diode from being too large and burning out. Please refer to Figure 7, a fourth resistor R4 and a second light-emitting diode D8 connected in series are connected in parallel between both ends of the coil K1-1 of the first relay K1, a fifth resistor R5 and a third light-emitting diode D9 connected in series are connected in parallel between both ends of the coil K2-1 of the second relay K2, a sixth resistor R6 and a fourth light-emitting diode D10 connected in series are connected in parallel between both ends of the coil K3-1 of the third relay K3, a seventh resistor R7 and a fifth light-emitting diode D11 connected in series are connected in parallel between both ends of the coil K4-1 of the fourth relay K4, and an eighth resistor R8 and a sixth light-emitting diode D12 connected in series are connected in parallel between both ends of the coil K5-1 of the fifth relay K5. The first drive power supply, the second drive power supply, the third drive power supply, the fourth drive power supply, and the fifth drive power supply are respectively indicated by the second light-emitting diode D8, the third light-emitting diode D9, the fourth light-emitting diode D10, the fifth light-emitting diode D11, and the sixth light-emitting diode D12. When the first drive power supply is selected and turned on, the second light-emitting diode D8 lights up, and so on for the others. It realizes the indication of different output drive power supplies, so that the test staff can understand and select a suitable drive power supply according to the type of the relay to be tested, and avoid accidents such as inaccurate testing or burning out the relay to be tested caused by the mismatch between the selected drive power supply and the rated voltage of the relay to be tested.

[0101] In specific implementation, the charging state of the battery can also be indicated by a ninth light-emitting diode D6, the completion of charging of the battery POW can be indicated by a seventh light-emitting diode D14, and the under-voltage state of the battery can be indicated by an eighth light-emitting diode D15, so that the user can understand the charge and discharge state of the power supply of the device. The reverse connection prevention unit 111 includes a fifth diode D6, and the reverse voltage withstand of the fifth diode D6 is not less than 500V, and the forward current is not less than 5A. The key unit 114 includes a power supply start switch F1, and the battery power supply can be connected or disconnected through the power supply start switch F1.

[0102] The following combines Figure 7 , and briefly explains the working principle of a relay test device:

[0103] The battery power supply passes through the first resistor R1, the inverter drive unit 122, the first triode Q1, the second triode Q2, and the multi-tap transformer T2. At the first end of the first secondary winding Nb1 of the multi-tap transformer T2, the first end of the second secondary winding Nb2 of the tap transformer T2, the first end of the third secondary winding Nb3 of the multi-tap transformer T2, the first end of the fourth secondary winding Nb4 of the multi-tap transformer T2, and the first end of the fifth secondary winding Nb5 of the multi-tap transformer T2, the first AC voltage, the second AC voltage, the third AC voltage, the fourth AC voltage, and the fifth AC voltage are respectively induced. Among them, the first AC voltage is the first drive power supply of 220V. The second AC voltage, the third AC voltage, the fourth AC voltage, and the fifth AC voltage are respectively rectified and filtered by the first diode D1 and the first capacitor C1, the second diode D2 and the second capacitor C2, the third diode D3 and the third capacitor C3, and the fourth diode D4 and the fourth capacitor C4, and then the second drive power supply (110V DC power supply), the third drive power supply (48V DC power supply), the fourth drive power supply (24V DC power supply), and the fifth drive power supply (12V DC power supply) are respectively output.

[0104] When a DC 12V is required to test the relay under test, the inspection working state indicator light (the first light-emitting diode D13) is lit. The 12V relay to be tested is connected to the test interface module 15, and the multi-position selection switch F2 is rotated to the fifth position 5. At this time, the fifth drive power supply (12V DC power supply) is loaded onto the coil K5-1 of the fifth relay K5 through the "5" position of the multi-position selection switch F2. The coil K5-1 of the fifth relay K5 is energized to generate excitation, so that the normally open contact K5-2 of the fifth relay K5 is closed, thereby conducting the fifth drive power supply to the test interface module 15 to supply power to the relay under test for testing. At the same time, the sixth light-emitting diode D12 indicates the fifth drive power supply.

[0105] For other power consumption requirements, refer to the power consumption operation of the fifth drive power supply, which will not be elaborated here. Through the first to fifth positions of the multi-position selection switch F2, the first drive power supply (220V AC power supply), the second drive power supply (110V DC power supply), the third drive power supply (48V DC power supply), the fourth drive power supply (24V DC power supply), and the fifth drive power supply (12V DC power supply) can be respectively selected to supply power to the relays under test with different rated voltage specifications for testing, and the first drive power supply, the second drive power supply, the third drive power supply, the fourth drive power supply, and the fifth drive power supply can be respectively indicated by the corresponding second light-emitting diode D8, third light-emitting diode D9, fourth light-emitting diode D10, fifth light-emitting diode D11, and sixth light-emitting diode D12.

[0106] After the test is completed, rotate the multi-gear selection switch F2 of the relay test device to the sixth gear (0), check that the working status indicator light (the first light-emitting diode D13) is turned off, and then turn off the power start switch F1. Charge the relay test device for standby. If it is not used for a long time, it needs to be charged at intervals to prevent battery damage.

[0107] The second aspect of the embodiments of the present invention provides a relay tester, which includes a box body and the relay test device as described above. Refer to Figure 8 , Figure 8 is a schematic diagram of the external structure of a relay tester. Among them, 6 is the box body. There are a plurality of fixing brackets 7 for installing relay test sockets on the box body 6. Multiple relay sockets 8 can be installed on each fixing bracket. The box body 6 is provided with a charging access socket F0, and this socket is a common pin-shaped socket with a standard grounding port.

[0108] In the embodiments of the present invention, multiple driving power supplies are output through the built-in power supply, and the corresponding driving power supply is selected to be connected to the relay under test according to the test requirements, so as to achieve the purpose of testing multiple relays simultaneously, improve the efficiency of relay test operations, avoid the need to replace different external power supplies when testing different relays, reduce the investment of manpower and material resources, the tester is convenient to move and operate, the test reliability and practicability are high, and the power consumption risk during long-term on-site test operations relying on external power supplies and multiple people is reduced.

[0109] However, those skilled in the art will understand that the embodiments can be implemented without such specific details. In other instances, well-known operations, components, and elements have been described in detail to avoid making the embodiments in the specification difficult to understand. Those skilled in the art will understand that the embodiments herein and shown are non-limiting examples, and thus it can be recognized that the specific structural and functional details disclosed herein can be representative and do not necessarily limit the scope of the embodiments.

[0110] Although some embodiments have been described in a certain level of detail above, those skilled in the art can make many changes to the disclosed embodiments without departing from the scope of the present disclosure. The use of "for example" throughout the specification should be interpreted broadly and used to provide non-limiting examples of the embodiments of the present disclosure, and the present disclosure is not limited to such examples. It is intended that all matters included in the above description or shown in the drawings should be construed as merely illustrative and not restrictive. Changes in details or structure can be made without departing from the present disclosure.

[0111] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A relay test device, characterized in that, the relay test device includes: an energy storage module for storing electric energy and outputting a battery power supply; a voltage inversion conversion module connected to the energy storage module for inverting and converting the battery power supply to generate a plurality of drive power supplies; a switch selection module connected to the voltage inversion conversion module for generating a key selection signal according to a user input; a switch module connected to the switch selection module and the voltage inversion conversion module for connecting at least one of the drive power supplies according to the key selection signal; the voltage inversion conversion module includes: an energy storage unit for storing energy according to the battery power supply; an inversion drive unit connected to the energy storage unit for generating a drive signal according to the battery power supply; a voltage inversion conversion unit connected to the inversion drive unit for inverting and converting the battery power supply according to the drive signal to generate the plurality of drive power supplies; the voltage inversion conversion unit includes a first resistor, a first triode, a second triode, a multi-tap transformer, a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor, a third capacitor, and a fourth capacitor; the first end of the first resistor is the battery power supply input end of the voltage inversion conversion unit; the second end of the first resistor is connected to the second end of the first primary winding of the multi-tap transformer and the first end of the second primary winding of the multi-tap transformer. The collector of the first triode is connected to the first end of the first primary winding of the multi-tap transformer. The second end of the second primary winding of the multi-tap transformer is connected to the collector of the second triode. The emitter of the first triode and the emitter of the second triode are connected to the power ground. The second end of the first secondary winding of the multi-tap transformer is connected to the first end of the second secondary winding of the multi-tap transformer and the anode of the first diode. The cathode of the first diode is connected to the first end of the first capacitor. The second end of the first capacitor is connected to the power ground. The second end of the second secondary winding of the multi-tap transformer is connected to the anode of the second diode and the first end of the third secondary winding of the multi-tap transformer. The cathode of the second diode and the first end of the second capacitor are connected. The second end of the second capacitor is connected to the power ground. The second end of the third secondary winding of the multi-tap transformer is connected to the anode of the third diode and the first end of the fourth secondary winding of the multi-tap transformer. The cathode of the third diode and the first end of the third capacitor are connected. The second end of the third capacitor is connected to the power ground. The second end of the fourth secondary winding of the multi-tap transformer is connected to the anode of the fourth diode and the first end of the fifth secondary winding of the multi-tap transformer. The cathode of the fourth diode and the first end of the fourth capacitor are connected. The second end of the fourth capacitor is connected to the power ground. The second end of the fifth secondary winding of the multi-tap transformer is connected to the power ground; The first end of the first secondary winding of the multi-tap transformer is the first drive power output terminal of the voltage inversion conversion unit; The first end of the first capacitor is the second drive power output terminal of the voltage inversion conversion unit; The first end of the second capacitor is the third drive power output terminal of the voltage inversion conversion unit; The first end of the third capacitor is the fourth drive power output terminal of the voltage inversion conversion unit; The first end of the fourth capacitor is the fifth drive power output terminal of the voltage inversion conversion unit; The bases of the first triode and the second triode together constitute the drive signal input terminal of the voltage inversion conversion unit; The switch module includes a first relay, a second relay, a third relay, a fourth relay, and a fifth relay; The first end of the coil of the first relay, the first end of the coil of the second relay, the first end of the coil of the third relay, the first end of the coil of the fourth relay, and the first end of the coil of the fifth relay are connected to the fifth drive power supply; The second end of the coil of the first relay, the second end of the coil of the second relay, the second end of the coil of the third relay, the second end of the coil of the fourth relay, and the second end of the coil of the fifth relay are connected to the power ground; The first end of the normally open contact of the first relay is the first drive power input terminal of the switch module; the first end of the normally open contact of the second relay is the second drive power input terminal of the switch module; the first end of the normally open contact of the third relay is the third drive power input terminal of the switch module; the first end of the normally open contact of the fourth relay is the fourth drive power input terminal of the switch module; the first end of the normally open contact of the fifth relay is the fifth drive power input terminal of the switch module; The second end of the normally open contact of the first relay is the first drive power output terminal of the switch module; the second end of the normally open contact of the second relay is the second drive power output terminal of the switch module; the second end of the normally open contact of the third relay is the third drive power output terminal of the switch module; the second end of the normally open contact of the fourth relay is the fourth drive power output terminal of the switch module; the second end of the normally open contact of the fifth relay is the fifth drive power output terminal of the switch module.

2. The relay testing device according to claim 1, wherein, the relay testing device further includes: a step-down rectification module for generating a charging power supply according to the input AC power supply; the energy storage module is used for charging and energy storage according to the charging power supply and outputting the battery power supply.

3. The relay testing device according to claim 1, wherein, the relay testing device further includes: a test interface module connected to the switch module for forwarding the drive power supply.

4. The relay testing device according to claim 2, wherein, the step-down rectification module includes: a first protection unit for overcurrent protection and short-circuit protection of the input AC power supply; A first voltage conversion unit connected to the first protection unit and used for converting the voltage of the input AC power supply to generate a first power supply; A rectification unit connected to the first voltage conversion unit and used for rectifying the first power supply to generate a rectified power supply; A first filtering unit connected to the rectification unit and used for filtering and noise reduction of the rectified power supply to generate the charging power supply.

5. The relay testing device according to claim 2, wherein, the energy storage module includes: a battery unit configured to store electrical energy according to the charging power supply and output a battery power supply; a battery protection unit connected to the battery unit and used for overcharge protection and over-discharge protection of the charging power supply and the battery power supply; an anti-reverse connection unit connected to the battery protection unit and the step-down rectification module and used for preventing reverse connection and backflow of the battery power supply; a key unit connected to the anti-reverse connection unit and the battery protection unit and used for connecting or disconnecting the battery power supply according to user input.

6. The relay testing device according to claim 1, wherein, the switch selection module includes a multi-position selection switch; the first position output terminal of the multi-position selection switch is the first key selection signal output terminal of the switch selection module; the second position output terminal of the multi-position selection switch is the second key selection signal output terminal of the switch selection module; the third position output terminal of the multi-position selection switch is the third key selection signal output terminal of the switch selection module; the fourth position output terminal of the multi-position selection switch is the fourth key selection signal output terminal of the switch selection module; the fifth position output terminal of the multi-position selection switch is the fifth key selection signal output terminal of the switch selection module; the key selection signals include the first key selection signal, the second key selection signal, the third key selection signal, the fourth key selection signal, and the fifth key selection signal.

7. A relay tester, wherein, the relay tester includes a box body and the relay testing device according to any one of claims 1 to 6.

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