CN211318651U - Porcelain insulator chain zero value detection auxiliary device - Google Patents
Porcelain insulator chain zero value detection auxiliary device Download PDFInfo
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- CN211318651U CN211318651U CN201921645830.4U CN201921645830U CN211318651U CN 211318651 U CN211318651 U CN 211318651U CN 201921645830 U CN201921645830 U CN 201921645830U CN 211318651 U CN211318651 U CN 211318651U
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Abstract
The utility model discloses a porcelain insulator chain zero value detects auxiliary device for solve among the prior art problem long when consuming time under the insulation resistance method inefficiency that adopts porcelain insulator. The method comprises the following steps: each insulator piece is connected in parallel and then connected to two ends of the insulation resistance meter; the two insulator pieces are in a group, each group of insulator pieces is connected in parallel and then sequentially connected with a current sampling circuit, a comparison circuit and an optical alarm circuit, the output end of each comparison circuit is connected with an acoustic alarm circuit, and the current sampling circuit, the comparison circuit, the optical alarm circuit and the acoustic alarm circuit are all connected with a power module. The beneficial effects include: through the use of the special auxiliary device for detecting the zero value of the porcelain insulator string of the transformer substation, the working load of maintainers is reduced while the test time is greatly shortened, the accuracy and the reliability of receiving and taking test signals are greatly improved, the working efficiency of operators is improved, and the operation time is shortened.
Description
Technical Field
The utility model relates to the field of electric power technology, especially, relate to a porcelain insulator chain zero value detects auxiliary device.
Background
With the rapid development of social economy, the power supply load is increased day by day, newly-built substations and newly-introduced electrical equipment are greatly increased, so that the contradiction between the safety production pressure and the equipment maintenance and repair efficiency is increasingly prominent, how to strengthen the safety production management and avoid the occurrence of safety events becomes an urgent problem to be solved while completing the repair plan in due time, analytical research is carried out aiming at zero value detection work of insulators in stations of 220kV and below, the insulators are important components in the power transmission and transformation equipment, and the functions of the insulators are mainly shown in isolating the high potential of a line lead from the ground potential of a tower and a framework, and realizing electrical insulation and mechanical fixation. It may leave a flaw due to collision during transportation and construction; during operation, the lightning stroke accident may cause the lightning stroke accident to break or damage the lightning stroke accident; degradation is caused by the long-term combination of mechanical load and high voltage. When the insulator chain has low value or zero value insulator, the flashover accident is easy to happen under the action of overvoltage even working voltage in the dirty environment. Therefore, effective detection and quality evaluation of the power grid on the porcelain insulator are enhanced, and the method is very important for ensuring safe, reliable and economic operation of the power grid.
The detection workload of the porcelain insulator is huge. According to the state overhaul regulations of the power transmission and transformation equipment, zero value detection of insulators with the voltage level of 110kV and above in the station is completed once every three years. The maintainer counted the work and found that the work required 3.5 years (work load was calculated as 24 hours per day) without interruption, which was significantly above the person's load capacity. At present, an insulation resistance method is adopted by national network companies for carrying out zero value detection on porcelain insulators in transformer substations, the method needs to carry out piece-by-piece inspection on the insulators, and the whole time consumption is long.
In conclusion, finally, aiming at the problem that the operation times of voltage adding and discharging are large for important reasons influencing the long zero-value detection time of the porcelain insulator string, the special auxiliary device for detecting the zero value of the porcelain insulator string of the transformer substation is developed to practically solve the field practical problem.
Disclosure of Invention
The embodiment of the utility model provides a porcelain insulator chain zero value detects auxiliary device for solve among the prior art problem long when consuming time under the insulation resistance method inefficiency that adopts porcelain insulator.
A porcelain insulator string zero value detection auxiliary device comprises: each insulator piece is connected in parallel and then connected to two ends of the insulation resistance meter; the two insulator pieces are in a group, each group of insulator pieces is connected in parallel and then sequentially connected with a current sampling circuit, a comparison circuit and an optical alarm circuit, the output end of each comparison circuit is connected with an acoustic alarm circuit, and the current sampling circuit, the comparison circuit, the optical alarm circuit and the acoustic alarm circuit are all connected with a power module.
Preferably, the porcelain insulator zero value detection auxiliary device further comprises a current display module, the current display module comprises an ammeter, one end of each ammeter is connected with the grounding end of the insulation resistance meter, and each group of insulator sheets are electrically connected with the other end of the corresponding ammeter after being connected in parallel.
Preferably, the power module comprises a device switch, a direct current input end and a rechargeable battery which are connected in series; the DC input end provides 12V DC voltage, and the rechargeable battery outputs 5V voltage.
Preferably, the light alarm circuit comprises a light emitting diode, and when the current value in the current sampling circuit is higher than the set threshold value in the comparison circuit, the comparison circuit outputs a high level, and the light emitting diode connected with the output end of the comparison circuit is conducted.
Preferably, the sound alarm circuit comprises a diode and a buzzer, when the current value in any current sampling circuit is higher than the set threshold value in the corresponding comparison circuit, the corresponding comparison circuit outputs high level, and the diode connected with the output end of the corresponding comparison circuit is conducted to drive the buzzer.
Preferably, the device is a box body, and a current sampling circuit, a comparison circuit, an optical alarm circuit, an acoustic alarm circuit and a power module are arranged in the box body; the upper surface of the box body is provided with a device panel, and the device panel is provided with a device switch, binding posts inserted into each group of insulator sheets after being connected in parallel, binding posts inserted into two ends of each group of insulator sheets, a grounding binding post, an L binding post and an E binding post connected into an insulation resistance meter, and a light-emitting diode; the side surface of the box body is provided with a buzzer.
Preferably, the device panel is made of an epoxy resin plate.
Preferably, the terminal inserted after each group of insulator sheets are connected in parallel, the terminals inserted at two ends of each group of insulator sheets, the grounding terminal, and the L terminal and the E terminal connected to the insulation resistance meter are pure copper terminals.
The utility model discloses beneficial effect includes: through the use of the special auxiliary device for detecting the zero value of the porcelain insulator string of the transformer substation, the working load of maintainers is reduced while the test time is greatly shortened, the accuracy and the reliability of receiving and taking test signals are greatly improved, the working efficiency of operators is improved, and the operation time is shortened.
Drawings
Fig. 1 is a schematic circuit diagram of a zero value detection auxiliary device for a porcelain insulator string in an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a unit of the porcelain insulator string zero-value detection auxiliary device in the embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a current display module according to an embodiment of the present invention;
fig. 4 is an enlarged circuit diagram of the upper part of fig. 1.
Detailed Description
In order to provide a porcelain insulator string zero value detection auxiliary device with high test efficiency, the following description is combined with the drawings of the specification to describe the preferred embodiment of the invention.
The utility model provides a porcelain insulator zero value detects auxiliary device adds every insulator in with porcelain insulator test process and gets voltage and the operation number of times that discharges reduces for 1 time, if when the zero value insulator appears, can send audible-visual alarm, has shortened the maintenance activity duration.
Referring to fig. 1-4, circuit connection diagrams of two groups of insulator sheets are shown, and circuit connection diagrams of other groups of insulator sheets are the same as those described above, in particular, an auxiliary device for detecting zero value of porcelain insulator comprises: each insulator piece is connected in parallel and then connected to two ends of the insulation resistance meter 5; the two insulator pieces are in a group, each group of insulator pieces is connected in parallel and then sequentially connected with a current sampling circuit 1, a comparison circuit 2 and an optical alarm circuit 3, the output end of each comparison circuit 2 is connected with an acoustic alarm circuit 6, and the current sampling circuit 1, the comparison circuit 2, the optical alarm circuit 3 and the acoustic alarm circuit 6 are all connected with a power module 4.
The porcelain insulator zero value detection auxiliary device further comprises a current display module, the current display module comprises ampere meters, one end of each ampere meter is connected with the 5 grounding ends of the insulation resistance meters, and each group of insulator pieces are electrically connected with the other end of the corresponding ampere meter after being connected in parallel.
The power module 4 comprises a device switch, a direct current input end and a rechargeable battery which are connected in series; the DC input end provides 12V DC voltage, and the rechargeable battery outputs 5V voltage.
The acousto-optic alarm mainly comprises the following steps: the light alarm circuit 3 comprises a light emitting diode, when the current value in the current sampling circuit 1 is higher than the set threshold value in the comparison circuit 2, the comparison circuit 2 outputs high level, and the light emitting diodes (LED 01, LED 02) connected with the output end of the comparison circuit 2 are conducted. The sound alarm circuit 6 includes diodes (D01, D305) and a buzzer SFM-27, when the current value in any one of the current sampling circuits 1 is higher than the set threshold value in the corresponding comparison circuit 2, the corresponding comparison circuit 2 outputs a high level, and the diodes (D01, D305) connected to the output end of the corresponding comparison circuit 2 are turned on to drive the buzzer SFM-27.
The device is a box body, and a current sampling circuit 1, a comparison circuit 2, an optical alarm circuit 3, an acoustic alarm circuit 6 and a power module 4 are arranged in the box body; the upper surface of the box body is provided with a device panel which is made of an epoxy resin plate. The device panel is provided with a device switch SW01, terminals inserted into each group of insulator sheets after being connected in parallel, terminals inserted into two ends of each group of insulator sheets, a grounding terminal, an L terminal and an E terminal connected into an insulation resistance meter 5, and light emitting diodes (LED 01 and LED 02); the side surface of the box body is provided with a buzzer SFM-27. The wiring terminal inserted after each group of insulator sheets are connected in parallel, the wiring terminals inserted at two ends of each group of insulator sheets, the grounding wiring terminal, the L wiring terminal and the E wiring terminal connected into the insulation resistance meter 5 are pure copper wiring terminals.
The structure and the application method of the porcelain insulator string zero-value detection auxiliary device in the embodiment of the present invention are described in detail below.
Referring to fig. 1 and 2, fig. 2 shows that only the detection circuit under one group of insulator sheets is shown, and the detection circuit is provided with the only acoustic alarm circuit 6 of the whole device, and RL1-RL26 in the figure is 26 insulator sheets, the zero value detection auxiliary device of the porcelain insulator string in the embodiment of the utility model is characterized in that each two insulator sheets are connected in parallel and then connected with a current sampling circuit 1, a comparison circuit 2 and an optical alarm circuit 3, all the insulator sheets are connected in parallel into the circuit, and then the output end of the comparison circuit 2 under each group of insulator sheets is connected with the same acoustic alarm circuit 6; the current sampling circuit 1 and the comparison circuit 2 are implemented in many ways, not limited to the embodiments of the present invention shown in the drawings.
After 5kV experimental voltage is added from two ends of an insulation resistance meter 5L, E, the insulation resistance value of each group of insulator sheets is more than 500M omega, namely when the passing current is less than 10 muA, the comparison circuit 2 does not act, and the optical alarm circuit 3 and the acoustic alarm circuit 6 are not conducted; if one of the insulator pieces in each group is less than 500 MOmega, namely the passing current is more than 10 muA, the comparison circuit 2 acts to output high level, the corresponding light alarm circuit 3 gives out light alarm, and the buzzer SFM-27 in the sound alarm circuit 6 gives out sound; because each parallel branch circuit measures signals of two insulator pieces in each group, when zero and low-value insulators are detected, only the two insulators are needed to be measured independently, so that the measuring time is greatly shortened, and the measuring range is narrowed. In addition, the number of times of adding and taking the voltage of the insulation resistance meter 5 is only one, so that the overall detection time length is greatly reduced.
Referring to fig. 3, only a part of the insulator pieces are drawn in fig. 3, in the zero-value detection auxiliary device for the porcelain insulator string in the embodiment, a parallel circuit is used for connecting all the insulator pieces in parallel, the same voltage is applied to each insulator piece, and an ammeter is connected in series after every two insulator pieces are connected in parallel, so that the leakage current of the insulator pieces can be measured and displayed.
The power module 4 adopts a direct current circuit module and provides direct current power for the current sampling circuit 1, the comparison circuit 2, the light alarm circuit 3 and the sound alarm circuit 6.
The current of the comparison circuit 2 is set to 10 μ a, and when the signal current is larger than 10 μ a, the comparison circuit 2 outputs a high level, so that the light emitting diode in the light alarm circuit 3 is turned on, and the diode (D01, D305) in series with the buzzer SFM-27 in the sound alarm circuit 6 is turned on. When the insulation resistance of any group of insulator sheets has zero or low value, the corresponding light emitting diode (LED 01, LED 02) in the group of circuits is lighted, and no matter which group of insulator sheets has zero or low value, the buzzer SFM-27 of the sound alarm circuit 6 can sound.
When the device is used specifically, a special test line for the insulation ohmmeter 5 is adopted, two ends of each insulator are connected into a circuit in parallel, a connection wire between two insulator sheets is inserted into a terminal inserted after each group of insulator sheets are connected in parallel, two ends of the two insulator sheets are inserted into terminals inserted at two ends of each group of insulator sheets, a ground wire is inserted into the grounding terminal, and output connection wires (L connection wires and E connection wires) of the insulation ohmmeter 5 are connected into the L terminal and the E terminal of the insulation ohmmeter 5 of the porcelain insulator string zero value detection auxiliary device in the embodiment of the utility model; after all the connection wires are connected, a device switch SW01 of the auxiliary device is opened, a switch of the insulation resistance meter 5 is opened, 5kV voltage is added, whether the light emitting diodes (LED 01 and LED 02) and the buzzer SFM-27 are operated or not is observed, whether the insulation resistance value of the insulation resistance meter 5 is qualified or not is observed, if one light emitting diode (LED 01 and LED 02) is lightened, the buzzer SFM-27 sounds, and the insulation resistance value displayed in the insulation resistance meter 5 is unqualified, the corresponding two insulator pieces can be independently measured through the position displayed by the light emitting diodes (LED 01 and LED 02) of the auxiliary device, if the light emitting diodes (LED 01 and LED 02) and the buzzer SFM-27 are not operated and the insulation resistance meter 5 displays normal, zero value detection work of the porcelain insulator string is completed, and the mark is normal.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. The utility model provides a porcelain insulator chain zero value detects auxiliary device which characterized in that includes: each insulator piece is connected in parallel and then connected to two ends of the insulation resistance meter; the two insulator pieces are in a group, each group of insulator pieces is connected in parallel and then sequentially connected with a current sampling circuit, a comparison circuit and an optical alarm circuit, the output end of each comparison circuit is connected with an acoustic alarm circuit, and the current sampling circuit, the comparison circuit, the optical alarm circuit and the acoustic alarm circuit are all connected with a power module.
2. The porcelain insulator string zero-value detection auxiliary device of claim 1, further comprising a current display module, wherein the current display module comprises ammeters, one end of each ammeter is connected with the grounding end of the insulation resistance meter, and each group of insulator sheets are electrically connected with the other end of the corresponding ammeter after being connected in parallel.
3. The porcelain insulator string zero-value detection auxiliary device of claim 1, wherein the power module comprises a device switch, a direct current input end and a rechargeable battery which are connected in series; the DC input end provides 12V DC voltage, and the rechargeable battery outputs 5V voltage.
4. The porcelain insulator string zero-value detection auxiliary device as claimed in claim 1, wherein the light alarm circuit comprises a light emitting diode, and when the current value in the current sampling circuit is higher than the set threshold value in the comparison circuit, the comparison circuit outputs high level, and the light emitting diode connected with the output end of the comparison circuit is conducted.
5. The porcelain insulator string zero-value detection auxiliary device as claimed in claim 1, wherein the acoustic alarm circuit comprises a diode and a buzzer, when the current value in any one of the current sampling circuits is higher than the set threshold value in the corresponding comparison circuit, the corresponding comparison circuit outputs a high level, and the diode connected with the output end of the corresponding comparison circuit is conducted to drive the buzzer.
6. The porcelain insulator string zero-value detection auxiliary device of claim 4 or 5, wherein the device is a box body, and a current sampling circuit, a comparison circuit, an optical alarm circuit, an acoustic alarm circuit and a power module are arranged in the box body; the upper surface of the box body is provided with a device panel, and the device panel is provided with a device switch, binding posts inserted into each group of insulator sheets after being connected in parallel, binding posts inserted into two ends of each group of insulator sheets, a grounding binding post, an L binding post and an E binding post connected into an insulation resistance meter, and a light-emitting diode; the side surface of the box body is provided with a buzzer.
7. The porcelain insulator string zero-value detection auxiliary device as claimed in claim 6, wherein the device panel is made of an epoxy resin plate.
8. The porcelain insulator string zero-value detection auxiliary device of claim 6, wherein the terminals inserted after each group of insulator sheets are connected in parallel, the terminals inserted at two ends of each group of insulator sheets, the grounding terminal, and the L terminal and the E terminal connected to the insulation resistance meter are pure copper terminals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921645830.4U CN211318651U (en) | 2019-09-29 | 2019-09-29 | Porcelain insulator chain zero value detection auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921645830.4U CN211318651U (en) | 2019-09-29 | 2019-09-29 | Porcelain insulator chain zero value detection auxiliary device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211318651U true CN211318651U (en) | 2020-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921645830.4U Expired - Fee Related CN211318651U (en) | 2019-09-29 | 2019-09-29 | Porcelain insulator chain zero value detection auxiliary device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211318651U (en) |
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2019
- 2019-09-29 CN CN201921645830.4U patent/CN211318651U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200821 Termination date: 20210929 |