CN220932224U - Auxiliary calibration device for oil immersed transformer oil thermometer - Google Patents
Auxiliary calibration device for oil immersed transformer oil thermometer Download PDFInfo
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- CN220932224U CN220932224U CN202322759999.5U CN202322759999U CN220932224U CN 220932224 U CN220932224 U CN 220932224U CN 202322759999 U CN202322759999 U CN 202322759999U CN 220932224 U CN220932224 U CN 220932224U
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Abstract
The utility model relates to the technical field of oil thermometer calibration instruments, in particular to an auxiliary calibration device for an oil immersed transformer oil thermometer, which comprises a device body with a hollow inside and a singlechip arranged in the device body, wherein a power module is arranged in the device body, the singlechip is electrically connected with the power module, a voltage output interface connected with an oil thermometer terminal row through a circuit, an analog input interface connected with an oil thermometer temperature analog output end through a circuit, a switching value input interface connected with an oil thermometer temperature action switching value contact through a circuit and a temperature display screen electrically connected with the singlechip are arranged on the outer side of the device body, the voltage output interface is electrically connected with the power module, and the analog input interface and the switching value input interface are electrically connected with the singlechip. According to the utility model, all temperature action switching value contacts of the oil thermometer are simultaneously connected into the auxiliary calibration device to replace a universal meter, so that the calibration efficiency and accuracy are prevented from being influenced due to untimely measurement or error of the measurement contacts.
Description
Technical Field
The utility model relates to the technical field of oil immersed transformer oil thermometer calibration instruments, in particular to an auxiliary calibration device for an oil immersed transformer oil thermometer.
Background
The oil immersed transformer thermometer is a temperature measuring element for measuring the copper oil temperature of a large oil immersed thermometer, and most of the type of the thermometer adopts a mechanical pointer type thermometer, and meanwhile, the thermometer can output the temperature as an analog quantity and can apply an action contact of a preset temperature value to each control system. According to DL/T1400-2015, the field calibration specification of the temperature measuring device of the oil immersed transformer specifies: the temperature measuring device is subjected to field calibration by combining with the state overhaul of an oil immersed transformer (a reactor and a converter transformer), and the verification period is generally not more than 6 years; therefore, for large power plants or substations, the verification frequency of the transformer thermometer is high.
Referring to fig. 1, a conventional verification method for an oil immersed thermometer includes an oil thermometer 3 (including a temperature measuring probe 301, a terminal row 302 and a pointer reading dial 303), a multimeter, a temperature control system 4 (including an oil tank 401, a temperature control device 402 and an operation terminal 403), wherein after the temperature measuring probe of the oil thermometer is placed in the oil tank, the temperature of transformer oil in the oil tank needs to be reached at the operation terminal, the temperature control device controls to heat the oil in the oil tank, when the temperature measuring probe measures the oil temperature value to reach an alarm value preset by the oil thermometer, a corresponding alarm contact is connected, and at the moment, an external multimeter is connected to the corresponding temperature action contact on the terminal row in the oil thermometer for measurement, so as to verify whether the action temperature value set by the thermometer is accurate. This prior art has the following problems: (1) At least 4 pairs of alarm joints are arranged on a conventional large-sized oil immersed transformer oil thermometer, and during the rising period of the oil temperature in an oil groove, a universal meter is used for testing whether all temperature action joints are connected or not under different temperature values; if the temperature of the oil in the oil tank rises to a certain set value and the oil thermometer acts, inaccurate verification is caused due to error or delay measurement of an action contact measured by the universal meter, and verification efficiency and result are affected; (2) The temperature value measured by the transformer oil thermometer is also required to be transmitted to a cooling control system of the transformer through a 4-20 milliamp channel to be used as display and control and to be transmitted to a monitoring system of a power plant (power station) to be used as display, but the traditional laboratory verification method generally has no milliamp channel, can not display analog values and verify channels, and can only carry out comparison verification through the set oil temperature in the oil groove and the mechanical pointer reading on the thermometer dial, so that larger errors exist in the temperature of the oil in the oil groove, the indication temperature of the thermometer dial and the display temperature of the milliamp channel.
Therefore, an auxiliary calibration device capable of improving the convenience, accuracy and reliability of the calibration of the oil thermometer is needed.
Disclosure of utility model
The utility model aims to provide an auxiliary calibration device for an oil immersed transformer oil thermometer, which is characterized in that after all temperature action switching value contacts of the oil thermometer are connected into the auxiliary calibration device, when all set temperature values of the oil thermometer act in the calibration process, the temperature values of a milliamp channel can be displayed on the auxiliary calibration device through a temperature display screen so as to solve the problems pointed out in the background art.
The embodiment of the utility model is realized by the following technical scheme: the utility model provides an auxiliary calibration device of oil-immersed transformer oil thermometer, includes inside hollow device body and locates the inside singlechip of device body, the inside power module that still is equipped with of device body, the singlechip is connected with the power module electricity, the device body outside is equipped with the voltage output interface that passes through the line connection with oil thermometer terminal row, the analog input interface that passes through the line connection with oil thermometer temperature analog output, the switching value input interface that passes through the line connection with oil thermometer temperature action switching value contact and the temperature display screen that is connected with the singlechip electricity, voltage output interface and power module electricity are connected, analog input interface, switching value input interface all are connected with the singlechip electricity.
According to a preferred embodiment, the power module comprises a socket connected with an external alternating current power supply input and a power conversion module electrically connected with the socket, and an output end of the power conversion module is connected to the voltage output interface.
According to a preferred embodiment, the power module further comprises a switch button, and the switch button is arranged on the outer side of the device body and is electrically connected with the single chip.
According to a preferred embodiment, the power module further comprises a grounding pile, wherein the grounding pile is arranged on the outer side of the device body and is electrically connected with the single chip microcomputer.
According to a preferred embodiment, the power module further comprises a voltage stabilizing module, one end of the voltage stabilizing module is electrically connected with the single chip microcomputer, and the other end of the voltage stabilizing module is connected to the socket.
According to a preferred embodiment, an indicator light corresponding to the switching value input interface is further arranged on the outer side of the device body, and the indicator light is electrically connected with the single chip.
According to a preferred embodiment, a buzzer is further arranged on the outer side of the device body, and the buzzer is electrically connected with the singlechip.
According to a preferred embodiment, the device body is further provided with a reset button on the outer side, and the reset button is arranged on the outer side of the device body and is electrically connected with the single chip.
The technical scheme of the auxiliary verification device for the oil immersed transformer oil thermometer has at least the following advantages and beneficial effects: according to the utility model, all temperature action switching value contacts of the oil thermometer are simultaneously connected to the auxiliary calibration device, and the auxiliary calibration device is adopted to replace a universal meter, so that the influence of untimely measurement or contact error on the calibration efficiency and the calibration accuracy are avoided; the auxiliary checking device is connected to the temperature analog output end of the oil thermometer, the temperature display screen is utilized for displaying, the temperature values of the oil groove temperature value, the dial pointer reading value of the thermometer and the temperature values of three different positions of the display value on the auxiliary checking device can be compared at the same time, so that whether an error exists in a certain value is judged, adjustment is carried out according to the need, the situation that temperature deviation occurs after the oil thermometer is checked and installed on a transformer is avoided, and further judgment of operation and maintenance personnel and control of a transformer cooling control system are affected.
Drawings
FIG. 1 is a schematic diagram of a prior art oil immersed thermometer calibration;
FIG. 2 is a schematic front view of an auxiliary verification device according to embodiment 1 of the present utility model;
FIG. 3 is a schematic diagram of the back side of the auxiliary checking device according to embodiment 1 of the present utility model;
Fig. 4 is a schematic diagram illustrating the calibration of an oil immersed thermometer of the auxiliary calibration device provided in embodiment 1 of the present utility model;
FIG. 5 is a schematic illustration of the electrical connection inside the auxiliary verification device according to embodiment 1 of the present utility model;
Icon: 1-external 220V alternating current power supply, 2-auxiliary verification device, 201-three-hole socket, 202-voltage stabilizing module, 203-conversion module, 204-voltage output interface, 205-switching value input interface, 206-analog input interface, 207-singlechip, 208-temperature display screen, 209-buzzer, 210-indicator lamp, 211-reset button, 212-switch button, 213-grounding column, 3-oil thermometer, 301-temperature probe, 302-terminal row, 303-pointer reading dial, 4-temperature control system, 401-oil groove, 402-temperature control device, 403-operation terminal.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Example 1
Referring to fig. 2 and 3, fig. 2 and 3 are schematic diagrams of front and back structures of an auxiliary checking device 2 for an oil immersed transformer oil thermometer according to an embodiment of the present utility model.
The auxiliary calibration device 2 is adopted to replace a universal meter in the embodiment, so that the influence on the calibration efficiency and the calibration accuracy caused by untimely measurement or measurement contact errors is avoided. Specifically, the auxiliary verification device 2 for the oil immersed transformer oil thermometer provided by the embodiment comprises a device body with a hollow inside and a singlechip 207 arranged in the device body, wherein the programming language of the singlechip 207 is Python, and C language, C++, java and the like can be used, so that redundant description is omitted.
The device body outside is equipped with the voltage output interface 204 that passes through the line connection with oil thermometer 3 terminal row 302, with the analog input interface 206 that passes through the line connection of oil thermometer 3 temperature analog output, with the switching value input interface 205 that the oil thermometer 3 temperature action switching value contact passes through the line connection and with the temperature display screen 208 that singlechip 207 electricity is connected, voltage output interface 204 is connected with power module electricity, analog input interface 206, switching value input interface 205 all are connected with the singlechip 207 electricity. The oil thermometer 3 receives the temperature returned by the temperature measuring probe 301 placed in the oil groove 401, transmits the temperature value to the analog input interface 206 of the auxiliary checking device 2, and displays the temperature on the temperature display screen 208 in real time after processing by the singlechip 207.
According to the embodiment, the temperature analog quantity output end of the oil thermometer 3 is connected to the auxiliary checking device 2, the temperature display screen 208 is utilized for displaying, the temperature value of the oil groove 401, the pointer reading value of the thermometer dial and the temperature value of three different positions of the display value on the auxiliary checking device 2 can be compared at the same time, so that whether an error exists in a certain value is judged, adjustment is carried out according to the need, the situation that temperature deviation occurs after the oil thermometer 3 is checked and installed on a transformer is avoided, and judgment of operation and maintenance personnel and control of a transformer cooling control system are affected.
Referring to fig. 4 and 5, a power module is further disposed inside the device body, the single-chip microcomputer 207 is electrically connected with the power module, in one implementation manner of this embodiment, the power module adopts an external power supply mode, and includes a three-hole socket 201 connected with an external 220V ac power supply 1 and a power conversion module 203 electrically connected with the three-hole socket 201, the power conversion module 203 converts the 220V ac power supply into 24V dc voltage, and an output end of the power conversion module 203 is connected to the voltage output interface 204 and is connected to the oil thermometer 3 through a wiring. Further, the power module further comprises a voltage stabilizing module 202, one end of the voltage stabilizing module 202 is electrically connected with the single chip microcomputer 207, the other end of the voltage stabilizing module is connected to the socket, and the power of the single chip microcomputer 207 is provided by the 220V alternating current power supply on the three-hole socket 201 after being converted by the voltage stabilizing module 202. The power module further comprises a switch button 212, wherein the switch button 212 is arranged on the outer side of the device body and is electrically connected with the singlechip 207, and the auxiliary verification device 2 is started and stopped through the switch button 212. The power module further comprises a grounding pile, and the grounding pile is arranged on the outer side of the device body and is electrically connected with the singlechip 207, so that the grounding pile is connected to a protection grounding point.
Further, an indicator lamp 210 corresponding to the switching value input interface 205 is further disposed on the outer side of the device body, and the indicator lamp 210 is electrically connected with the single-chip microcomputer 207. A buzzer 209 is further arranged on the outer side of the device body, and the buzzer 209 is electrically connected with the singlechip 207; the device body outside is also provided with a reset button 211, and the reset button 211 is arranged on the device body outside and is electrically connected with the singlechip 207. The temperature control system is electrically connected with the oil thermometer 3 and comprises an oil groove 401, a temperature control device 402 and an operation terminal 403. In one implementation manner of this embodiment, after the oil temperature in the oil tank 401 reaches a certain preset operation temperature of the oil thermometer 3, the contact of the temperature operation switch value of the oil thermometer 3 corresponding to the switch value input interface 205 is turned on, and at the same time, the corresponding indicator lamp 210 is turned on, and the buzzer 209 sounds; after the temperature continues to rise to the second preset temperature value, the contacts of the second set of temperature action switches are turned on, the corresponding indicator lamps 210 are lightened, the buzzer 209 sounds, and the temperature display screen 208 displays the current temperature value. After the contact point of each temperature operation switch is turned on to generate a beeping sound, the reset button 211 can be manually pressed to stop the buzzing and indicating lamp 210.
In this embodiment, when the contact of each temperature operation switch is turned on, the corresponding indicator lamp 210 is turned on, and the buzzer 209 sounds, so that whether the contact of each temperature operation switch preset by the oil thermometer 3 normally operates can be more intuitively reflected by the sound and light effects.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The utility model provides an auxiliary calibration device (2) of oil-immersed transformer oil thermometer, its characterized in that, including inside hollow device body and locate inside singlechip (207) of device body, the inside power module that still is equipped with of device body, singlechip (207) are connected with the power module electricity, the device body outside is equipped with voltage output interface (204) through the circuit connection with oil thermometer (3) terminal row (302), analog input interface (206) through the circuit connection with oil thermometer (3) temperature analog output, switching value input interface (205) through the circuit connection with oil thermometer (3) temperature action switching value contact and temperature display screen (208) of being connected with singlechip (207), voltage output interface (204) are connected with the power module electricity, analog input interface (206), switching value input interface (205) are all connected with singlechip (207) electricity.
2. The auxiliary verification device (2) of an oil immersed transformer oil thermometer according to claim 1, wherein the power supply module comprises a socket connected to an external ac power supply input and a power supply conversion module (203) electrically connected to the socket, and an output end of the power supply conversion module (203) is connected to a voltage output interface (204).
3. The auxiliary verification device (2) for the oil immersed transformer oil thermometer according to claim 1, wherein the power module further comprises a switch button (212), and the switch button (212) is arranged on the outer side of the device body and is electrically connected with the single chip microcomputer (207).
4. The auxiliary verification device (2) for the oil immersed transformer oil thermometer according to claim 1, wherein the power module further comprises a grounding pile, and the grounding pile is arranged on the outer side of the device body and is electrically connected with the single chip microcomputer (207).
5. The auxiliary verification device (2) of the oil immersed transformer oil thermometer according to claim 2, wherein the power module further comprises a voltage stabilizing module (202), one end of the voltage stabilizing module (202) is electrically connected with the single chip microcomputer (207), and the other end of the voltage stabilizing module is connected to the socket.
6. The auxiliary verification device (2) for the oil immersed transformer oil thermometer according to claim 1, wherein an indicator lamp (210) corresponding to the switching value input interface (205) is further arranged on the outer side of the device body, and the indicator lamp (210) is electrically connected with the single chip microcomputer (207).
7. The auxiliary verification device (2) for the oil immersed transformer oil thermometer according to claim 1, wherein a buzzer (209) is further arranged on the outer side of the device body, and the buzzer (209) is electrically connected with the singlechip (207).
8. The auxiliary verification device (2) for the oil immersed transformer oil thermometer according to claim 1, wherein a reset button (211) is further arranged on the outer side of the device body, and the reset button (211) is arranged on the outer side of the device body and is electrically connected with the single chip microcomputer (207).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322759999.5U CN220932224U (en) | 2023-10-13 | 2023-10-13 | Auxiliary calibration device for oil immersed transformer oil thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322759999.5U CN220932224U (en) | 2023-10-13 | 2023-10-13 | Auxiliary calibration device for oil immersed transformer oil thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220932224U true CN220932224U (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322759999.5U Active CN220932224U (en) | 2023-10-13 | 2023-10-13 | Auxiliary calibration device for oil immersed transformer oil thermometer |
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| Country | Link |
|---|---|
| CN (1) | CN220932224U (en) |
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2023
- 2023-10-13 CN CN202322759999.5U patent/CN220932224U/en active Active
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