CN2475014Y - Transformer oil surface thermometer - Google Patents
Transformer oil surface thermometer Download PDFInfo
- Publication number
- CN2475014Y CN2475014Y CN 01241472 CN01241472U CN2475014Y CN 2475014 Y CN2475014 Y CN 2475014Y CN 01241472 CN01241472 CN 01241472 CN 01241472 U CN01241472 U CN 01241472U CN 2475014 Y CN2475014 Y CN 2475014Y
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- CN
- China
- Prior art keywords
- operational amplifier
- resistance
- temperature
- anode
- transformer oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a voltage transformer oil-level thermometer, comprising a casing 1, a temperature control instrument 2 arranged in the casing 1, a connecting terminal 3 and a draught fan control device 4. The temperature control instrument (1) is connected with a sensing device 5, and a temperature transmitter 6 is arranged in the casing 1. The special design greatly reduces volume of the regulated power supply and the temperature transmitter, and can be arranged in a standard temperature-measuring instrument case, with the advantages of simple structure, very convenient on-site installment, and complete functions. Signal can be directly input in a computer, and the display is direct-viewing and precise, which meets operating and monitoring requirements of a transformer.
Description
The utility model relates to a kind of transformer oil surface temperature meter that is used to detect with the control transformer top-oil temperature.
Transformer is in continuous use, and its interior oil temperature will raise along with the increase of service time, and this just need monitor the temperature of transformer, in time starts heat sink.The product that the temperature of transformer is monitored is made up of sensor and temperature control instrument the earliest, this product can record the top-oil temperature of transformer, and can in time start heat sink, realization is to the temperature control of sensor, but, the demonstration of its temperature can only show by temperature control instrument, shows not directly perceived.For this reason, people have designed a kind of secondary instrument (digital watch) that can join with sensor, in order to showing the top-oil temperature of transformer intuitively, though, product ratio properties of product advanced person in the past after the improvement, but but than in the past product complexity, the used stabilized voltage supply of digital watch and digital watch all respectively is a separate unit on the structure, assembling separately, on-the-spot installation is very inconvenient, and can not directly provide input signal to computing machine, is difficult to finish man-machine conversation.
The purpose of this utility model provide a kind of simple in structure, multiple functional, can be directly to the transformer oil surface temperature meter of computer input signal.
Technical solution of the present utility model is: a kind of transformer oil surface temperature meter, comprise housing 1, be arranged on temperature control instrument 2, connection terminal 3 and fan controller 4 in the housing 1, be connected to sensor 5, be provided with temperature transmitter 6 in the described housing 1 with temperature control instrument (1).
Also be provided with the mu balanced circuit 7 that joins with temperature transmission circuit 6 in the described housing 1.
In the described housing 1 temperature transmission circuit 6 is set and mu balanced circuit 7 is placed in the housing 8.
Be provided with platinum resistance Pt in the thermometer bulb of described sensor 5, platinum resistance Pt and temperature transmitter 9 join.
Described temperature transmitter 6 is for being provided with the computing amplification circuit that comprises operational amplifier U2-1, U2-2, U2-3, be connected to resistance R 4, R5 between the anode of operational amplifier U2-1 and the output terminal, power supply "+5V " is connected to resistance R 10, the resistance R 8 that is connected to capacitor C 1 between the anode of operational amplifier U2-1 and the ground and is in series, potentiometer W2, resistance R 7 with the anode of operational amplifier U2-1; Negative terminal and the output terminal of operational amplifier U2-2 join, and join with the contact of potentiometer W2 and resistance R 7, be connected to capacitor C 2 between the anode of operational amplifier U2-2 and the ground, resistance R 3, potentiometer W1, resistance R 9 that the anode of operational amplifier U2-2 and power supply "+5V " join and be in series, the output terminal of the anode of operational amplifier U2-3 and operational amplifier U2-1 joins, and resistance R 6, capacitor C 3 are arranged between the negative terminal of operational amplifier U2-3 and the ground.
The utility model is compared with prior art, special design is dwindled the volume of stabilized voltage supply, temperature transmitter greatly, can be arranged in the temperature measurer watchcase of standard, not only simple in structure, on-the-spot installation is very convenient, can directly temperature signal be imported computing machine, solved the problem of dtmf distortion DTMF that signal repeatedly transmits, and can carry out temperature digital at the monitoring scene and show that intuitive display is accurate, has satisfied the requirement that transformer normally moves, monitors.
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the theory diagram of the utility model embodiment.
Fig. 3 is the utility model embodiment voltage-stabilized power supply circuit schematic diagram.
Fig. 4 is the utility model embodiment temperature transmitter circuit theory diagrams.
Below in conjunction with accompanying drawing and specific embodiment of the utility model the utility model is further described.As shown in Figure 1: temperature control instrument 2, connection terminal 3 and fan controller 4 have been installed in housing 1, be connected to sensor 5 with temperature control instrument 1, stabilized voltage supply 6, temperature transmitter 7 also are fixedly mounted in the housing 1, in order to prevent on-the-spot electromagnetic interference (EMI), stabilized voltage supply 6, temperature transmitter 7 are placed in the housing 8.
Circuit block diagram is as shown in Figure 2: be connected to sensor with temperature control instrument, be connected to temperature transmitter with sensor, be connected to stabilized voltage supply with temperature transmitter.
Voltage-stabilized power supply circuit 6 is as shown in Figure 3: be provided with integrated package of pressure-stabilizing U1 (SV06G00B), be connected to resistance R 1, capacitor C 7, C8 with integrated package U1, with " 13 " pin of integrated package of pressure-stabilizing U1 also join resistance R 2, stabilivolt D1, capacitor C 6, C4, with " 15 " pin of integrated package of pressure-stabilizing U1 capacitor C 5 of joining, with voltage be the output terminal of the 5V regulator block U3 (LM336) that joins.
Temperature transmission circuit 7 is as shown in Figure 4: be provided with the computing amplification circuit (LM324) that comprises operational amplifier U2-1, U2-2, U2-3, be connected to resistance R 4, R5 between the anode of operational amplifier U2-1 and the output terminal, power supply "+5V " is connected to resistance R 10, the resistance R 8 that is connected to capacitor C 1 between the anode of operational amplifier U2-1 and the ground and is in series, potentiometer W2, resistance R 7 with the anode of operational amplifier U2-1; Negative terminal and the output terminal of operational amplifier U2-2 join, and join with the contact of potentiometer W2 and resistance R 7, be connected to capacitor C 2 between the anode of operational amplifier U2-2 and the ground, resistance R 3, potentiometer W1, resistance R 9 that the anode of operational amplifier U2-2 and power supply "+5V " join and be in series, the output terminal of the anode of operational amplifier U2-3 and operational amplifier U2-1 joins, and resistance R 6, capacitor C 3 are arranged between the negative terminal of operational amplifier U2-3 and the ground.
Principle of work: sensor of the present utility model is the sensor that adopts existing flexible member (corrugated tube), kapillary and thermometer bulb to form, when dut temperature changes, the volume of the temperature sensing medium in the thermometer bulb changes thereupon, this dilatation is delivered to flexible member in the temperature control instrument by kapillary, make it to produce a corresponding displacement, temperature control instrument gets final product pointer displays temperature value, and the output control signal reaches the purpose of control transformer temperature rise with the driving transformer cooling system.Be arranged on the platinum resistance (Pt100) in the thermometer bulb, temperature signal is become electric signal, normalized current signal by the temperature transmitter 7 outputs 4-20mA corresponding with temperature value, use for department of computer science's secondary instrument of unifying, synchronous digital shows and the control transformer top-oil temperature, solve the problem of remote transmission signal distortion, guarantee the transformer safe operation.
Claims (5)
1. transformer oil surface temperature meter, comprise housing (1), be arranged on temperature control instrument (2), connection terminal (3) and fan controller (4) in the housing (1), be connected to sensor (5) with temperature control instrument (1), it is characterized in that: be provided with temperature transmitter (6) in the described housing (1).
2. transformer oil surface temperature meter according to claim 1 is characterized in that: also be provided with the mu balanced circuit (7) that joins with temperature transmission circuit (6) in the described housing (1).
3. transformer oil surface temperature meter according to claim 1 and 2 is characterized in that: temperature transmission circuit (6) is set in the described housing (1) and mu balanced circuit (7) is placed in the housing (8).
4. transformer oil surface temperature meter according to claim 1 and 2 is characterized in that: be provided with platinum resistance Pt in the thermometer bulb of described sensor (5), platinum resistance Pt and temperature transmitter (9) join.
5. transformer oil surface temperature meter according to claim 1 and 2, it is characterized in that: described temperature transmitter (6) is for being provided with the computing amplification circuit that comprises operational amplifier U2-1, U2-2, U2-3, be connected to resistance R 4, R5 between the anode of operational amplifier U2-1 and the output terminal, power supply "+5V " is connected to resistance R 10, the resistance R 8 that is connected to capacitor C 1 between the anode of operational amplifier U2-1 and the ground and is in series, potentiometer W2, resistance R 7 with the anode of operational amplifier U2-1; Negative terminal and the output terminal of operational amplifier U2-2 join, and join with the contact of potentiometer W2 and resistance R 7, be connected to capacitor C 2 between the anode of operational amplifier U2-2 and the ground, resistance R 3, potentiometer W1, resistance R 9 that the anode of operational amplifier U2-2 and power supply "+5V " join and be in series, the output terminal of the anode of operational amplifier U2-3 and operational amplifier U2-1 joins, and resistance R 6, capacitor C 3 are arranged between the negative terminal of operational amplifier U2-3 and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01241472 CN2475014Y (en) | 2001-04-28 | 2001-04-28 | Transformer oil surface thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01241472 CN2475014Y (en) | 2001-04-28 | 2001-04-28 | Transformer oil surface thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2475014Y true CN2475014Y (en) | 2002-01-30 |
Family
ID=33653466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01241472 Expired - Fee Related CN2475014Y (en) | 2001-04-28 | 2001-04-28 | Transformer oil surface thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2475014Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589742A (en) * | 2012-02-22 | 2012-07-18 | 昆明理工大学 | Oil-immersed power transformer top-level oil temperature monitoring method based on thermistor |
| CN110987204A (en) * | 2019-12-04 | 2020-04-10 | 南京韦伯测控技术有限公司 | Intelligent transmitting device for measuring temperature of large oil-immersed power transformer winding |
-
2001
- 2001-04-28 CN CN 01241472 patent/CN2475014Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102589742A (en) * | 2012-02-22 | 2012-07-18 | 昆明理工大学 | Oil-immersed power transformer top-level oil temperature monitoring method based on thermistor |
| CN110987204A (en) * | 2019-12-04 | 2020-04-10 | 南京韦伯测控技术有限公司 | Intelligent transmitting device for measuring temperature of large oil-immersed power transformer winding |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |