Transformer device with indication function
By integrating temperature, pressure, current, phase loss, and terminal block detection circuits into the transformer unit, and combining them with an SMS module, real-time monitoring and anomaly alerts for the transformer's main data are achieved. This solves the problems of fault escalation and inconvenient data viewing in existing technologies, and improves fault handling efficiency.
Patent Information
- Application Number
- CN202520363627.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-04
AI Technical Summary
Existing transformer equipment lacks proactive alerts in abnormal situations, increasing the risk of escalating faults, and the displayed data is not easily accessible from a distance.
The transformer unit integrates temperature, pressure, current, phase loss, and terminal block detection circuits, combined with an SMS module, to achieve real-time data monitoring and anomaly alerts.
It enables real-time monitoring and anomaly alerts for transformer body data, reducing the escalation of faults and facilitating data viewing and remote processing for staff.
Smart Images
Figure CN223857957U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power equipment technology, and in particular to a transformer device with an indicating function. Background Technology
[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are a primary coil, a secondary coil, and an iron core (magnetic core). Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer). Transformers can be classified according to their uses as follows: distribution transformers, power transformers, fully sealed transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, angle transformers, high-current transformers, excitation transformers, etc. Transformers are fundamental equipment for power transmission and distribution, and are widely used in industry, agriculture, transportation, urban communities, and other fields.
[0003] While existing transformers meet power supply needs to some extent, their structural limitations result in the following technical drawbacks. Specifically, they generally only display real-time operating current and temperature using ammeters and thermometers, providing relatively limited data. Furthermore, the display interfaces for current and temperature data are relatively small (and do not actively illuminate), making them inconvenient for ground-based personnel to view. Additionally, they fail to proactively alert remote personnel when abnormal conditions occur, such as temperature fluctuations, load changes, phase loss, internal transformer oil levels below normal thresholds, or loosening of wiring terminals. This lack of timely intervention increases the likelihood of transformer malfunctions escalating. Therefore, it is essential to provide a transformer device with more comprehensive performance monitoring functions, convenient data viewing for staff, and proactive alerts for timely intervention in case of abnormal data. Utility Model Content
[0004] To overcome the shortcomings of existing transformers due to structural limitations, as described in the background art, this utility model provides a transformer device based on the transformer body. During operation, with the joint action of relevant mechanisms, it can monitor the transformer body temperature, internal transformer oil volume, and whether there is phase loss or loose terminals in real time. Staff can conveniently view various data on the ground, and when relevant data is abnormal, it can send different text messages to relevant staff at the remote location to handle the situation in a timely manner, thus minimizing the escalation of faults.
[0005] The technical solution adopted by this utility model to solve its technical problem is:
[0006] A transformer device with indicating function includes a transformer body, a battery, a text messaging module, a voltage display meter, and also includes temperature and pressure detection probes, temperature detection circuits, pressure detection circuits, current detection circuits, phase loss detection circuits, and terminal block detection circuits. The transformer body has multiple mounting slots at the lower end of the terminal blocks. Multiple sets of terminal block detection circuits are provided, each including a push-button normally open self-resetting power switch and a diode. The power switches for these circuits are installed in multiple mounting slots, with the push-button located on the upper part of each slot. The temperature and pressure detection probes include pressure... The sensor, thermistor, and pressure sensor are all mounted together, with the inlet pipe at the front and the thermistor at the rear. Inlet holes are distributed around the inlet pipe. A threaded hole is located on the lower side of the transformer body's casing, and the pressure sensor's inlet pipe is installed within this threaded hole. The diodes of the battery, SMS module, voltmeter, temperature detection circuit, pressure detection circuit, current detection circuit, phase loss detection circuit, and terminal block detection circuit are installed in a component box. The signal input terminals of the SMS module and multiple voltmeters are electrically connected to the signal output terminals of the temperature detection circuit, pressure detection circuit, current detection circuit, phase loss detection circuit, and terminal block detection circuit.
[0007] Furthermore, the outer diameter of the thermistor is smaller than the outer diameter of the pressure sensor's inlet pipe.
[0008] Furthermore, the temperature detection circuit includes an electrically connected resistor, a transistor, and a diode, and is connected to a thermistor. One end of the thermistor is connected to one end of the resistor and the base of the transistor. The collector of the transistor is connected to the negative terminal of the diode, and the other end of the resistor is connected to the emitter of the transistor.
[0009] Furthermore, the pressure detection circuit includes an electrically connected relay, resistor, transistor, and diode, and is connected to a pressure sensor. The positive power input terminal of the pressure sensor is connected to the positive power input terminal of the relay. The negative power input terminal of the pressure sensor is connected to the control power input terminal of the relay, one end of the first resistor, and the emitter of the transistor. The other end of the first resistor is connected to one end of the second resistor and the base of the transistor. The collector of the transistor is connected to the negative power input terminal of the relay. The normally closed contact of the relay is connected to the negative terminal of the diode. The signal output terminal of the pressure sensor is connected to the other end of the second resistor.
[0010] Furthermore, the current detection circuit includes an electrically connected current transformer, rectifier bridge, capacitor, resistor, diode, and transistor. One phase wire of the power output terminal of the transformer body passes through the central hole in the middle of the current transformer. The power output terminal of the current transformer is connected to the power input terminal of the rectifier bridge. The positive power output terminal of the rectifier bridge is connected to the positive terminal of the capacitor and one end of the first resistor. The negative power output terminal of the rectifier bridge is connected to one end of the second resistor and the emitter of the transistor. The other end of the first resistor and the other end of the second resistor are connected to the base of the transistor. The collector of the transistor is connected to the negative terminal of the diode.
[0011] Furthermore, the phase loss detection circuit includes three relays and a diode that are electrically connected. One power input terminal of each of the three relays is connected to the neutral wire of the three-phase four-wire circuit. The other power input terminal of each of the three relays is connected to the three phase wires of the three-phase four-wire circuit. The control power input terminals of the first, second, and third relays are connected to the negative power output terminal of the power module. The normally closed contact terminals of the first, second, and third relays are connected to the negative terminal of the diode.
[0012] Furthermore, in the terminal block detection circuit, one end of the power switch is connected to the negative terminal of the diode; the other end of the power switch of multiple terminal block detection circuits is connected to the positive terminals of multiple diodes.
[0013] Compared with existing technologies, the advantages of this utility model are as follows: Based on the transformer body, during operation, the temperature and pressure detection probes, temperature detection circuit, pressure detection circuit, current detection circuit, phase loss detection circuit, and terminal block detection circuit work together to monitor the transformer body's temperature, internal transformer oil volume, and the presence of phase loss or loose terminals in real time via an actively illuminating LED voltage display. Staff can conveniently view various data from the ground, and when abnormal data is detected, the SMS module can send different SMS messages to remote staff for timely on-site handling, minimizing the escalation of faults. Based on the above, this utility model has good application prospects. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0015] Figure 1 This is a schematic diagram of the overall structure and a partially enlarged part of the structure of this utility model.
[0016] Figure 2 This is the circuit diagram of this utility model. Detailed Implementation
[0017] Figure 1 , 2As shown, the transformer device with indicating function includes a transformer body 1, a battery G1, a text messaging module W3, an LED voltage display, and also includes a temperature and pressure detection probe 2, a temperature detection circuit 3, a pressure detection circuit 4, a current detection circuit 5, a phase loss detection circuit 6, and a terminal block detection circuit 7. The transformer body has four mounting slots 101 at the lower end of the terminal blocks on the upper part of the casing. There are four sets of terminal block detection circuits. Each set includes a normally open self-resetting power switch SN with a jog button and a diode VDN. The power switches SN of the four sets of terminal block detection circuits are fixedly and sealed in the four mounting slots 101, with the button of the power switch SN located outside the upper end of the mounting slot 101. The lower ends of the four sets of terminal blocks 102 of the transformer body contact the button of the power switch SN, and the internal contacts of the power switch SN are open. The temperature and pressure detection probe includes a pressure sensor W2 and a thermistor RT. The pressure sensor W2... The front part of the liquid pipe and the rear end of the thermistor RT are glued together. There are four liquid inlet holes 21 around the liquid inlet pipe at the rear end of the thermistor RT, which communicate with the inside of the liquid inlet pipe (to facilitate the entry of transformer oil into the liquid inlet pipe). There is a threaded hole on the lower right side of the front end of the transformer body 1. The liquid inlet pipe of the pressure sensor W2 is screwed into the threaded hole, and then the pressure sensor W2 is sealed and installed on the outer end of the threaded hole (the inner end of the liquid inlet pipe and the thermistor RT are located inside the housing of the transformer body 1, and the wire connected to the thermistor RT is sealed and enters the component compartment of the pressure sensor W2 and is located outside the front end of the pressure sensor W2 along with the wire of the pressure sensor). The diodes of the battery G1, SMS module W3, LED voltage display meter, temperature detection circuit 3, pressure detection circuit 4, current detection circuit 5, phase loss detection circuit 6, and terminal detection circuit 7 are installed in the component box 8. The rear end of the component box 8 is fixedly installed on the right front outer end of the transformer body 1.
[0018] Figure 1 , 2As shown, the outer diameter of the thermistor RT is smaller than the outer diameter of the inlet pipe of the pressure sensor W2. The temperature detection circuit includes a resistor R3, a transistor Q1, and a diode VD1 connected via circuit board wiring, and is connected to the thermistor RT. One end of the thermistor RT is connected to one end of the resistor R3 and the base of the transistor Q1. The collector of the transistor Q1 is connected to the cathode of the diode VD1. The other end of the resistor R3 is connected to the emitter of the transistor VD1. The pressure detection circuit includes a relay J4, resistors R1 and R2, transistor Q2, and diode VD2 connected via circuit board wiring, and is connected to a pressure sensor W2. The positive power input terminal 1 of the pressure sensor W2 is connected to the positive power input terminal of the relay J4. The negative power input terminal 2 of the pressure sensor W2 is connected to the control power input terminal of the relay J4, one end of the first resistor R2, and the emitter of the transistor Q2. The other end of the first resistor R2 is connected to one end of the second resistor R1 and the base of the transistor Q2. The collector of the transistor Q2 is connected to the negative power input terminal of the relay J4. The normally closed contact of the relay J4 is connected to the negative terminal of the diode VD2. The signal output terminal 3 of the pressure sensor W2 is connected to the other end of the second resistor R1. The current detection circuit includes a current transformer M, a rectifier bridge W, a capacitor C1, resistors R4 and R5, a diode VD4, and a transistor Q3, all connected via circuit board wiring. One phase wire of the power output terminal of the transformer body 1 passes through the central hole in the middle of the current transformer M. The power output terminal (two terminals on the secondary side) of the current transformer M is connected to the power input terminals 1 and 2 of the rectifier bridge W. The positive power output terminal 3 of the rectifier bridge W is connected to the positive terminal of capacitor C1 and one end of the first resistor R4. The negative power output terminal 4 of the rectifier bridge W is connected to one end of the second resistor R5 and the emitter of the transistor Q3. The other end of the first resistor R4 and the other end of the second resistor R5 are connected to the base of the transistor Q3. The collector of the transistor Q3 is connected to the negative terminal of the diode VD4. The phase loss detection circuit includes three relays J1, J2, and J3 connected via circuit board wiring, and a diode VD3. One power input terminal of each relay (J1, J2, J3) is connected to the neutral line L of the three-phase four-wire system. The other power input terminal of each relay (J1, J2, J3) is connected to the three phase lines N1, N2, and N3 respectively. The control power input terminal of the first relay J1, the second relay J2, and the third relay J3 is connected to pin 4 of the negative power output terminal of the power module W1. The normally closed contact terminal of the first relay J1, the second relay J2, and the third relay J3 is connected to the negative terminal of diode VD3. In each set of terminal block detection circuits, one terminal of the power switch SN is connected to the negative terminal of diode VDN; in all four sets of terminal block detection circuits, the other terminal of the power switch SN is connected to the positive terminal of each of the four diodes VDN.
[0019] Figure 1 , 2As shown, the power input terminals 1 and 2 of the power module W1 are connected to the two poles of the 220V AC power supply via wires. The power output terminals 3 and 4 of the power module W1 are connected to the two poles of the battery G1. The power input terminals 1 and 2 of the SMS module W3, the other end of the resistor R3 in the temperature detection circuit and the other end of the thermistor RT, the other end of the resistor R2 in the pressure detection circuit and the positive power input terminal 1 of the pressure sensor W2, the other end of the resistor R4 in the current detection circuit, the power input terminal of the relay J1 in the phase loss detection circuit, and the other end of the power switch SN in the four sets of terminal block detection circuit are connected via wires. The negative power input terminal 2 of the pressure sensor W2 is connected to the 4th pin of the power module W1 via wires. The signal input terminals 3, 4, 5, 6, and 7 of the SMS module W3, the positive terminal of diode VD1 (signal output terminal of temperature detection circuit), the positive terminal of diode VD2 (signal output terminal of pressure detection circuit), the positive terminal of diode VD4 (signal output terminal of current detection circuit), the positive terminal of diode VD3 (signal output terminal of phase loss detection circuit), and the positive terminal of diode VDN (signal output terminal of four sets of terminal block detection circuits) are connected by wires. The power input terminals of LED voltage displays (display surface located on the front exterior of the component box) V1, V2, V3, V4, and VN (four units), the other end of resistor R3, and the positive terminal of battery G1 are connected; the other end of resistor R2 is connected to the positive terminal of battery G1; the normally closed contacts of relays J1, J2, and J3 are connected to the positive terminal of battery G1; the other end of resistor R5 is connected to the positive terminal of battery G1; and the other ends of the four power switches SN are connected to the positive terminal of battery G1.
[0020] Figure 1 , 2 As shown, after the 220V AC power enters the power input terminal of the power module W1, the power module W1 outputs a stable 12V DC power from pins 3 and 4 to the battery G1 (normally charging the battery G1 to ensure that the relevant circuits can still operate after the mains power fails).
[0021] The power input terminals of the SMS module W3, temperature detection circuit, pressure detection circuit, pressure sensor W2, current detection circuit, phase loss detection circuit, and four sets of terminal block detection circuits are powered on, and the above circuits and the battery are powered on. After the temperature detection circuit and thermistor RT are powered on, they will monitor the transformer oil temperature inside the transformer body 1 in real time. When the oil temperature is high, the thermistor RT receives more heat, resulting in a lower resistance value and a lower voltage drop across resistor R3, causing the voltmeter V1 to display a higher voltage reading. Conversely, when the oil temperature is low, the voltmeter V1 displays a lower voltage reading. When the oil temperature does not exceed the set temperature (e.g., below 95℃), the 12V power supply, through the thermistor RT and resistor R3, enters the base of transistor Q1 at a voltage below 0.7V, so transistor Q1 will not conduct, and pin 3 of the SMS module W3 will not receive a low level input, thus preventing the sending of the first SMS message. When the oil temperature exceeds the set temperature (e.g., above 95℃), the 12V power supply, through the thermistor RT and resistor R3, enters the base of transistor Q1 at a voltage above 0.7V, causing transistor Q1 to conduct. The collector outputs a low level, which is then unidirectionally conducted through diode VD1 to pin 3 of the SMS module W3, causing the SMS module W3 to send the first SMS message. After the pressure detection circuit and pressure sensor are powered on, they will monitor the transformer oil pressure inside the transformer body 1 in real time (the higher the pressure, the more oil). When the oil volume is high, the pressure sensor W2 experiences greater pressure, and its output voltage signal at pin 3 is relatively large. The voltage signal is divided between resistors R1 and R2, resulting in a high voltage reading on voltmeter V2. Conversely, the voltage reading on voltmeter V2 is low. When the oil volume exceeds the set amount (submerging the transformer coils), the voltage signal is divided between resistors R1 and R2 and enters the base of transistor Q1, where it is higher than 0.7V. Transistor Q2 will then conduct, and its collector will output a low level that enters the negative terminal of relay J4. When the power input terminal is reached, relay J4 is energized and its control power input terminal and normally closed contact terminal are open. Pin 4 of SMS module W3 will not receive a low level, and it will not send a second SMS message. When the oil level is less than the set amount (not submerging the upper part of the transformer's inner coil), the voltage signal is divided by resistors R1 and R2 and enters the base of transistor Q1, where it is below 0.7V. Transistor Q2 will be cut off, and its collector will no longer output a low level to the negative power input terminal of relay J4. Relay J4 is de-energized and no longer energized, closing its control power input terminal and normally closed contact terminal. Pin 4 of SMS module W3 will receive a low level, and SMS module W3 will then send a second SMS message.
[0022] Figure 1 , 2As shown, after the current detection circuit is powered on, it will monitor the electrical load inside the transformer body 1 in real time. The larger the electrical load, the larger the output current on the secondary side of the current transformer M, and vice versa. Correspondingly, the current and voltage output from pins 3 and 4 of the rectifier bridge W are relatively high (the current output from the rectifier bridge W is rectified by capacitor C1, and the voltage displayed by voltmeter V4 after voltage division by resistors R4 and R5 is high), and vice versa. When the load does not exceed the set current (e.g., below 400A), the power output from the rectifier bridge W is divided by resistors R4 and R5 and enters the base of transistor Q3, resulting in a voltage below 0.7V. Transistor Q3 will not conduct, and pin 5 of the SMS module W3 will not receive a low level input, thus preventing the sending of a third SMS message. When the load exceeds the set current (e.g., above 400A), the power output from the rectifier bridge W is divided by resistors R4 and R5 and enters the base of transistor Q3, resulting in a voltage above 0.7V. Transistor Q3 will conduct, and its collector will output a low level input to pin 5 of the SMS module W3, allowing the SMS module W3 to send a third SMS message. After the phase loss detection circuit is powered on, when there is no phase loss in the power output of transformer body 1, relays J1, J2, and J3 are energized and closed. When relays J1, J2, and J3 are energized and closed, their control power input terminals and normally closed contacts are open. In this way, pin 6 of SMS module W3 will not input a low level and will not send a fourth SMS message. In actual situations, if any phase line or neutral line output by the transformer body stops outputting (phase loss), or relays J1, J2, and J3 lose power, a low level will be output from pin 4 of power module W1, which will enter pin 6 of SMS module W3 through diode VD3 (at the same time, voltmeter V3 will be energized and display the corresponding voltage value, representing a phase loss in the transformer body output). Thus, SMS module W3 will send a fourth SMS message. After the four sets of terminal detection circuits are powered on, if the four terminals of the transformer body 1 are not loose, the lower ends of the four terminals will press the buttons of the four power switches SN, opening the internal contacts of the power switches SN, and the SMS module W3 will send the fifth SMS message. When one or more terminals of the transformer body 1 become loose (e.g., bolts loosen, terminals shake, or fall off the installation position), the lower ends of one or more terminals will no longer press the buttons of the four power switches SN, and the internal contacts of one or more power switches SN will close. The low level output from pin 4 of the power module W1 will enter pin 7 of the SMS module W3 through one or more diodes VDN (at the same time, the voltmeter VN will be powered on and display the corresponding voltage value, indicating that one or more terminals of the transformer body are loose, etc.). Then, the SMS module W3 will send the fifth SMS message.
[0023] Figure 1 , 2As shown above, during operation, this new type of transformer can monitor the temperature of the transformer body, the amount of internal transformer oil, and whether there is phase loss or loose wiring terminals in real time via an actively illuminating LED voltage display. Staff can conveniently view various data from the ground, and when relevant data is abnormal, the SMS module can send different SMS messages to relevant staff at the remote location to handle the situation promptly (after receiving different SMS messages, the relevant personnel can understand the specific situation on site), thus minimizing the escalation of the fault. Figure 2 As shown, power module W1 is an AC 220V to DC 12V power module; voltmeters V1, V2, V3, V4, and VN are LED self-illuminating voltmeters with a range of 24V; relay J4 is DC 12V; relays J2, J3, and J1 are AV 220V; capacitor C1 is a 470μF / 25V electrolytic capacitor; diodes VD1, VD2, VD3, VD4, and VDN (unidirectional conduction) are 1N4007; transistors Q1, Q2, and Q3 are 9013 (NPN); thermistor RT is a negative temperature coefficient thermistor of model MF52; pressure sensor W2 is model BP8G-AxA, which has two power input terminals and one signal output terminal; current transformer M is a small current transformer of model GTA08L; rectifier bridge W is model MB10F. SOP4; The SMS module W3 is a text message alarm device from the brand Biyin Technology, model 95106. It has two power input terminals and six low-level signal input terminals. After a low-level signal is input to each of the six low-level signal input terminals, the SMS alarm device will send six different text messages.
[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.
[0025] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A transformer device with indication function, comprising a transformer body, a battery, a short message module, a voltage display table, characterized in that, The transformer body has a plurality of installation slots at the lower position of the shell terminal end, and the power switch of each set of terminal post detection circuit is installed in the installation slot, and the button of the power switch is located at the upper end of the installation slot.
2. The transformer device with indication function according to claim 1, characterized in that, The outer diameter of the thermistor is smaller than the outer diameter of the liquid inlet pipe of the pressure sensor.
3. The transformer device with indication function according to claim 1, characterized in that, The temperature detection circuit includes a resistance and a triode electrically connected, and a diode, and is connected with the thermistor. One end of the thermistor is connected with one end of the resistance and the base of the triode. The collector of the triode is connected with the negative electrode of the diode. The other end of the resistance is connected with the emitter of the triode.
4. The transformer device with indication function according to claim 1, characterized in that, The pressure detection circuit includes a relay, a resistance, a triode, and a diode electrically connected, and is connected with the pressure sensor. The positive power input end of the pressure sensor is connected with the positive power input end of the relay. The negative power input end of the pressure sensor is connected with the control power input end of the relay, one end of the first resistance, and the emitter of the triode. The other end of the first resistance is connected with one end of the second resistance and the base of the triode. The collector of the triode is connected with the negative power input end of the relay. The normally closed contact end of the relay is connected with the negative electrode of the diode. The signal output end of the pressure sensor is connected with the other end of the second resistance.
5. The transformer device with indication function according to claim 1, characterized in that, The current detection circuit includes a current transformer, a rectifier bridge, a capacitor, a resistance, a diode, and a triode electrically connected. One of the power output ends of the transformer body passes through the center hole of the current transformer. The power output end of the current transformer is connected with the power input end of the rectifier bridge. The positive power output end of the rectifier bridge is connected with the positive electrode of the capacitor and one end of the first resistance. The negative power output end of the rectifier bridge is connected with one end of the second resistance and the emitter of the triode. The other end of the first resistance is connected with the other end of the second resistance and the base of the triode. The collector of the triode is connected with the negative electrode of the diode.
6. The transformer device with indication function according to claim 1, characterized in that, The open-phase detection circuit comprises three relays and a diode which are electrically connected. One end of the power input of the three relays is connected with the zero line of the three-phase four-wire, and the other end of the power input of the three relays is connected with the three phase lines of the three-phase four-wire respectively. The control power input of the first, second and third relays is connected with the negative power output of the power module. The normally closed contact end of the first, second and third relays is connected with the negative electrode of the diode.
7. The transformer device with indication function according to claim 1, characterized in that, In the connection pile detection circuit, one end of the power switch is connected with the negative electrode of the diode. The other end of the power switch of the multiple connection pile detection circuits is connected, and the positive electrodes of the multiple diodes are connected.