A transformer maintenance device

Abstract

The utility model relates to a transformer maintenance device belongs to detection field. The utility model discloses a kind of transformer maintenance device, to solve the problem that existing transformer is not convenient to overhaul. Notch is opened in the surface of holding rod, square groove is opened in the one end of holding rod along the length direction of holding rod, movable rod is placed in square groove, the one end of movable rod is connected with push button, push button is limited in notch and moves along the length direction of holding rod, push button back is connected with slide rail, and the inner surface of square groove has the sliding slot matched with slide rail;Crossbeam is arranged in the surface of the one end of holding rod, through-hole that can make the other end of movable rod pass through is opened in crossbeam, L type limiting rod is connected with crossbeam, detection coil is wound on L type limiting rod, and transmitter coil is sleeved on transformer low-voltage terminal post;Detection discharge circuit is embedded in holding rod;Detection circuit is inducted whether transformer low-voltage terminal post is electrified by detection coil, to make controller trigger switch to close, and discharge circuit is conducted; discharge circuit receives the electric energy that transformer low-voltage terminal post exports through transmitter coil, and the electric energy is discharged. For detecting whether terminal post is electrified and discharging.

Description

Technical Field

[0001] This invention relates to transformer maintenance. It falls under the field of testing. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. A transformer has a high-voltage side and a low-voltage side. There are four terminals on the high-voltage side and the low-voltage side of the transformer, namely the A-phase terminal, the B-phase terminal, the C-phase terminal and the neutral phase terminal. The high-voltage line is connected to the four terminals on the high-voltage side, and the low-voltage line is connected to the four terminals on the low-voltage side. In this way, the high-voltage AC power enters the high-voltage side through the high-voltage terminals, is transformed by the transformer, and is output as low-voltage AC power from the low-voltage side. The low-voltage AC power flows out through the low-voltage terminals to power other equipment.

[0003] During operation, the connection points between the low-voltage terminals and the low-voltage lines on the 66kV to 10kV transformer are wrapped with insulating sleeves to prevent leakage. When the transformer needs to be disconnected for maintenance, the main power supply is first turned off. Then, a voltage tester is used to touch the low-voltage terminals to check if the transformer is no longer carrying high voltage. If the test confirms that the transformer is not carrying high voltage, a grounding clamp is then attached to the low-voltage terminals to conduct the weak current on the low-voltage side to the ground, further ensuring personal safety. Then, maintenance personnel disconnect the high-voltage and low-voltage connections on the transformer and begin maintenance. However, in actual operation, when using a voltage tester, due to the wiring... The pole is covered with an insulating sleeve. In order for the voltage tester to touch the terminal for testing, the tip of the tester must be forcefully inserted into the bottom of the insulating sleeve. Since the insulating sleeve is made of hard plastic, the tester tip is pried open by the forceful insertion, resulting in the insulating sleeve not being properly sealed and posing a risk of conductivity. In addition, after testing, a grounding wire needs to be installed on the terminal. However, because the terminal is covered, the grounding wire cannot be installed. Therefore, in actual application, maintenance personnel have to destroy the insulating sleeve before grounding the wire. After repairing the transformer, they then reconnect the low-voltage wiring and reinstall a new insulating sleeve. This is time-consuming and wasteful of insulating sleeves, causing trouble for transformer maintenance. Summary of the Invention

[0004] The present invention aims to solve the problem of inconvenient transformer maintenance by proposing a transformer maintenance device.

[0005] A transformer maintenance device includes a handle, a push button, a movable rod, an L-shaped limiting rod, a detection coil, a horizontal plate, a detection discharge circuit, and a transmitting coil.

[0006] A notch is made on the surface of the grip, and a square groove is made at one end of the grip along the length of the grip, with the notch and the square groove connected. A movable rod is placed in the square groove, and a push button is connected to one end of the movable rod. The push button is restricted to move within the notch along the length of the grip. A slide rail is connected to the back of the push button, and a slide groove that mates with the slide rail is provided on the inner surface of the square groove.

[0007] A horizontal plate is set on one end of the handle, and a through hole is opened on the horizontal plate to allow the other end of the movable rod to pass through. An L-shaped limiting rod is connected to the horizontal plate, and a detection coil is wound on the L-shaped limiting rod. A transmitting coil is sleeved on the low-voltage terminal of the transformer, and an insulating sleeve is sleeved on the transmitting coil.

[0008] The grip has an embedded discharge detection circuit;

[0009] The discharge detection circuit includes a detection circuit, a controller, a switch, and a discharge circuit.

[0010] The detection circuit is used to detect whether the low-voltage terminal of the transformer is energized by the detection coil and send the energized signal to the controller.

[0011] The controller is used to trigger the switch to close after receiving an energized signal, thereby turning on the discharge circuit;

[0012] The discharge circuit is used to receive the electrical energy output from the low-voltage terminal of the transformer through the transmitting coil after the circuit is turned on, and then discharge the electrical energy.

[0013] Preferably, the detection circuit includes capacitors C1-C2, transistors IN1-IN3, and diodes (LEDs);

[0014] One end of the detection coil is a free end. The other end of the detection coil is connected to one end of capacitor C1. The other end of capacitor C1 is connected to one end of capacitor C2. The other end of capacitor C2 is connected to the base of transistor IN1. The emitter of transistor IN1 is connected to the base of transistor IN2. The emitter of transistor IN2 is connected to the base of transistor IN3. The emitter of transistor IN3 is connected to the negative terminal of the 5V power supply. The collector of transistor IN1 is simultaneously connected to the collector of transistor IN2, the positive terminal of diode LED, the positive terminal of 5V power supply, and the input terminal of the controller. The negative terminal of diode LED is connected to the collector of transistor IN3. The output terminal of the controller is used to control the switch closure.

[0015] Preferably, the discharge circuit includes a receiving coil, a receiving end resonant compensation circuit, a rectifier bridge, and a discharge element;

[0016] The receiver resonant compensation circuit is used to induce AC current on the transmitting coil through the receiving coil and transmit the AC current to the rectifier bridge.

[0017] A rectifier bridge is used to rectify alternating current to obtain direct current, which is then transmitted to the discharge element.

[0018] Discharge element, used to discharge direct current.

[0019] Preferably, the rectifier bridge consists of four switching transistors and four diodes.

[0020] Preferably, the discharge element is implemented using a battery or a grounding wire.

[0021] Preferably, the receiver resonance compensation circuit is implemented using capacitor C3.

[0022] The beneficial effects of this invention are as follows:

[0023] This application uses an L-shaped limiting rod fitted over the insulating sleeve of the terminal block. Pushing the push button extends the movable rod, creating a closed loop with the L-shaped limiting rod, completely enclosing the terminal block within this loop and increasing the induction accuracy of the detection coil. If the terminal block is energized at this time, the LED will light up. The controller then closes the switch. Because the terminal block has a transmitting coil, the receiving coil senses the current after the switch closes. A rectifier bridge converts the AC power to DC power. This DC energy can be stored in a battery for other uses, avoiding energy waste, or it can be grounded for rapid discharge. Therefore, this application can accurately detect and discharge energized terminals without removing the insulating sleeve, saving time and effort when disassembling and assembling transformers. Attached Figure Description

[0024] Figure 1 A schematic diagram of a transformer maintenance device with the movable rod in an open state;

[0025] Figure 2 A schematic diagram of a transformer maintenance device with the movable rod in the closed state;

[0026] Figure 3 This is a schematic diagram of the slide rail structure;

[0027] Figure 4 This is a schematic diagram of the slide rail structure on the inner surface of the square groove;

[0028] Figure 5 This is a schematic diagram of the discharge detection circuit. Detailed Implementation

[0029] Specific implementation method one: Refer to Figures 1 to 4 This embodiment describes a transformer maintenance device, which includes a gripping rod 1, a push button 2, a movable rod 3, an L-shaped limiting rod 4, a detection coil 5, a horizontal plate 7, a detection discharge circuit 6, and a transmitting coil.

[0030] A notch 1-1 is made on the surface of the grip 1. A square groove is made at one end of the grip 1 along the length of the grip 1, and the notch 1-1 and the square groove are connected. A movable rod 3 is placed in the square groove. One end of the movable rod 3 is connected to a push button 2. The push button 2 is restricted to move within the notch 1-2 along the length of the grip 1. The back of the push button 2 is connected to a slide rail 2-1. A slide groove 1-2 that mates with the slide rail 2-1 is provided on the inner surface of the square groove 1-3.

[0031] A horizontal plate 7 is set on one end surface of the grip rod 1, and a through hole is opened on the horizontal plate 7 to allow the other end of the movable rod 3 to pass through. An L-shaped limiting rod 4 is connected to the horizontal plate 7. A detection coil 5 is wound on the L-shaped limiting rod 4. A transmitting coil is sleeved on the low-voltage terminal of the transformer, and an insulating sleeve is sleeved on the transmitting coil.

[0032] The grip 1 has an embedded discharge detection circuit 6;

[0033] The discharge detection circuit 6 includes a detection circuit 6-1, a controller, a switch, and a discharge circuit 6-2;

[0034] The detection circuit 6-1 is used to detect whether the low-voltage terminal of the transformer of the detection coil 5 is energized and send an energized signal to the controller.

[0035] The controller is used to trigger the switch to close after receiving a charged signal, thereby turning on the discharge circuit 6-2;

[0036] The discharge circuit 6-2 is used to receive the electrical energy output from the low-voltage terminal of the transformer through the transmitting coil after the circuit is turned on, and to discharge the electrical energy.

[0037] In this embodiment, the working principle of this application is as follows:

[0038] The operator holds lever 1, places the L-shaped limiting rod over the insulating sleeve of the terminal block, and pushes the push button to extend the movable rod, forming a closed loop with the L-shaped limiting rod. This ensures the terminal block is completely enclosed within the loop, increasing the sensing accuracy of the detection coil. During testing, the insulating sleeve does not need to be removed; simply align the detection coil with the terminal block. The detection coil can then detect whether the terminal block is energized. If the terminal block is energized, the LED will light up, and the controller will close the switch. Because the terminal block has a transmitting coil, the receiving coil will sense the current after the switch is closed. The AC power is converted to DC power using a rectifier bridge. This DC power can be stored in a battery for other uses, preventing energy waste, or the DC power can be grounded for rapid discharge.

[0039] Figure 3The slide rail 2-1 is a T-shaped structure, which includes a vertically arranged horizontal plate and a vertical plate. The slide groove 1-2 is a T-shaped groove, which includes a vertically arranged horizontal groove and a vertical groove. The horizontal plate is embedded in the horizontal groove, and the vertical plate is embedded in the vertical groove, so that the slide rail 2-1 can slide in the slide groove 1-2.

[0040] Specific Implementation Method Two: Refer to Figure 5 This embodiment is a further description of the transformer maintenance device described in Specific Embodiment 1. In this embodiment, the detection circuit 6-1 includes capacitors C1-C2, transistors IN1-IN3 and diodes LED.

[0041] One end of the detection coil 5 is a free end. The other end of the detection coil 5 is connected to one end of capacitor C1. The other end of capacitor C1 is connected to one end of capacitor C2. The other end of capacitor C2 is connected to the base of transistor IN1. The emitter of transistor IN1 is connected to the base of transistor IN2. The emitter of transistor IN2 is connected to the base of transistor IN3. The emitter of transistor IN3 is connected to the negative terminal of the 5V power supply. The collector of transistor IN1 is simultaneously connected to the collector of transistor IN2, the positive terminal of diode LED, the positive terminal of 5V power supply, and the input terminal of the controller. The negative terminal of diode LED is connected to the collector of transistor IN3. The output terminal of the controller is used to control the switch closure.

[0042] In this embodiment, the present application can detect whether the terminal is energized without removing the insulating sleeve, and discharge the energized terminal.

[0043] Specific Implementation Method Three: Refer to Figure 5 This embodiment is a further explanation of the transformer maintenance device described in Specific Embodiment 1. In this embodiment, the discharge circuit 6-2 includes a receiving coil, a receiving end resonant compensation circuit, a rectifier bridge, and a discharge element.

[0044] The receiver resonant compensation circuit is used to induce AC current on the transmitting coil through the receiving coil and transmit the AC current to the rectifier bridge.

[0045] A rectifier bridge is used to rectify alternating current to obtain direct current, which is then transmitted to the discharge element.

[0046] Discharge element, used to discharge direct current.

[0047] Specific Implementation Method Four: Refer to Figure 5 This embodiment is a further explanation of the transformer maintenance device described in Specific Embodiment 3. In this embodiment, the rectifier bridge consists of 4 switching transistors and 4 diodes.

[0048] Specific Implementation Method Five: Refer to Figure 5This embodiment is a further explanation of the transformer maintenance device described in Specific Embodiment 3. In this embodiment, the discharge element is implemented using a battery or a grounding wire.

[0049] In this embodiment, a battery is used to store the electrical energy, thus avoiding energy waste.

[0050] Specific Implementation Method Six: Refer to Figure 5 This embodiment is a further explanation of the transformer maintenance device described in Specific Embodiment 3. In this embodiment, the receiving end resonant compensation circuit is implemented using capacitor C3.

Claims

1. A transformer servicing device, characterized in that The device comprises a handle (1), a push button (2), a movable rod (3), an L-shaped limiting rod (4), a detection coil (5), a cross plate (7), a detection discharge circuit (6) and a transmitting coil; A notch (1-1) is formed on the surface of the handle (1), a square slot is formed on one end of the handle (1) along the length direction of the handle (1), the notch (1-1) and the square slot are communicated, the movable rod (3) is placed in the square slot, one end of the movable rod (3) is connected with the push button (2), the push button (2) is movably limited in the notch (1-2) along the length direction of the handle (1), the back of the push button (2) is connected with a sliding rail (2-1), and a sliding groove (1-2) matched with the sliding rail (2-1) is arranged on the inner surface of the square slot (1-3); The cross plate (7) is arranged on the surface of one end of the handle (1), a through hole through which the other end of the movable rod (3) passes is formed on the cross plate (7), the L-shaped limiting rod (4) is connected with the cross plate (7), the detection coil (5) is wound on the L-shaped limiting rod (4), the transmitting coil is sleeved on the low-voltage terminal of the transformer, and an insulating sleeve is sleeved on the transmitting coil; The detection discharge circuit (6) is embedded in the handle (1); The detection discharge circuit (6) comprises a detection circuit (6-1), a controller, a switch and a discharge circuit (6-2); The detection circuit (6-1) is used for sensing whether the low-voltage terminal of the transformer is electrified through the detection coil (5) and sending an electrified signal to the controller; The controller is used for triggering the switch to be closed after receiving the electrified signal, so that the discharge circuit (6-2) is turned on; The discharge circuit (6-2) is used for receiving the electric energy output by the transmitting coil through the low-voltage terminal of the transformer and discharging the electric energy after being turned on.

2. The transformer servicing device of claim 1, wherein, The detection circuit (6-1) comprises capacitors C1-C2, transistors IN1-IN3 and a diode LED; One end of the detection coil (5) is a free end, the other end of the detection coil (5) is connected with one end of the capacitor C1, the other end of the capacitor C1 is connected with one end of the capacitor C2, the other end of the capacitor C2 is connected with the base of the transistor IN1, the emitter of the transistor IN1 is connected with the base of the transistor IN2, the emitter of the transistor IN2 is connected with the base of the transistor IN3, the emitter of the transistor IN3 is connected with the negative electrode of a 5V power supply, the collector of the transistor IN1 is connected with the collector of the transistor IN2, the positive electrode of the diode LED, the positive electrode of the 5V power supply and the input end of the controller, the negative electrode of the diode LED is connected with the collector of the transistor IN3, and the output end of the controller is used for controlling the switch to be closed.

3. The transformer servicing device of claim 1, wherein, The discharge circuit (6-2) comprises a receiving coil, a receiving end resonance compensation circuit, a rectifier bridge and a discharge element; The receiving end resonance compensation circuit is used for inducing the alternating current on the transmitting coil through the receiving coil and transmitting the alternating current to the rectifier bridge; The rectifier bridge is used for rectifying the alternating current to obtain direct current and transmitting the direct current to the discharge element; The discharge element is used for discharging the direct current.

4. The transformer servicing device of claim 3, wherein, The rectifier bridge is composed of four switching tubes and four diodes.

5. The transformer servicing device of claim 3, wherein, The discharge element is realized by a battery or a grounding wire.

6. A transformer servicing device according to claim 3, characterised in that The receiving end resonance compensation circuit is realized by a capacitor C3.

Images