CN210222146U

CN210222146U - Fault indicator casing inspection frock

Info

Publication number: CN210222146U
Application number: CN201920675048.0U
Authority: CN
Inventors: Ke Xu; 许克; Shengxian Wang; 王胜贤; Liang Wang; 王亮; Hao Zhang; 张�浩; Yuan Wang; 王源; Guangpeng Xue; 薛广鹏
Original assignee: Zhiyang Innovation Technology Co Ltd
Current assignee: Zhiyang Innovation Technology Co Ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2020-03-31
Anticipated expiration: 2029-05-10

Abstract

The utility model relates to a fault indicator casing inspection tool, belonging to the field of fault indicator production; the single detection plate comprises a power circuit, a Rogowski coil acquisition circuit, a battery voltage acquisition circuit and a single chip microcomputer, wherein the input of the power circuit is connected with the output of a shell CT, the input of the Rogowski coil acquisition circuit is connected with the output of the shell Rogowski coil, the output of the Rogowski coil acquisition circuit is connected with the single chip microcomputer, and the input of the battery voltage acquisition circuit is connected with the output of the shell battery voltage, and the output of the battery voltage acquisition circuit is connected with the single chip microcomputer; the single chip microcomputer is connected with a radio frequency module transmitting end, a radio frequency module receiving end is connected with an android screen, and M is an integer of 1-50. The shell data are automatically detected after the single board is electrified, so that the test points are prevented from being sequentially detected by using a universal meter, and the workload is reduced.

Description

Fault indicator casing inspection frock

Technical Field

The utility model relates to a fault indicator casing inspection frock belongs to fault indicator production field.

Background

In the field of power system detection, a line fault indicator can be installed on an overhead line and an underground cable line and used for judging whether a line has a short circuit or a ground fault. Once the short circuit or the ground fault occurs to the line, the maintenance personnel can quickly determine the short circuit and ground fault section, branch and fault point by means of the positioning information sent by the system and the red alarm display of the fault indicator.

The fault indicator casing contains a CT coil for power supply of equipment, a Rogowski coil for detecting circuit current and a backup battery. The fault indicator collects line current through the Rogowski coil, and when the line is electrified, the line is powered through the CT to maintain self-work, and when the line is not electrified, the line is maintained to self-work through the backup battery. The function of the shell of the fault indicator directly determines the performance of the whole fault indicator, so that the shell inspection is very important. However, when detecting the casing, the casing needs to be hung on the detection coil, a relay protection instrument or a fault indicator tester applies a large current, then the CT terminal, the battery terminal and the rogowski coil terminal are respectively connected to the detection tool, and then a multimeter is used for sequentially measuring and recording. The inspection of the machine shell is time-consuming and labor-consuming, and is an important link influencing the production efficiency of the fault indicator.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a fault indicator casing inspection frock, automated inspection casing data avoids using the universal meter to detect the test point in proper order, reduces work load.

The utility model discloses a fault indicator casing inspection frock includes voltage regulator, cement resistance, current coil, M detects the veneer, the android screen, radio frequency module, and voltage regulator input AC220V power, and the output L end of voltage regulator connects the cement resistance, and the current coil is connected to the cement resistance other end, and the output N end of voltage regulator is connected to the current coil other end; the detection single board comprises a power circuit, a Rogowski coil acquisition circuit, a battery voltage acquisition circuit and a single chip microcomputer, wherein the input of the power circuit is connected with the output of the CT of the shell, the input of the Rogowski coil acquisition circuit is connected with the output of the Rogowski coil of the shell, the output of the Rogowski coil acquisition circuit is connected with the single chip microcomputer, and the input of the battery voltage acquisition circuit is connected with the voltage output of the battery of the shell; the single chip microcomputer is connected with a radio frequency module transmitting end, a radio frequency module receiving end is connected with an android screen, and M is an integer of 1-50.

A voltage regulator input AC220V power supply for outputting current to the current coil; the cement resistor is connected in series with a current coil and a voltage regulator output loop and used for stabilizing current. The current coil is used for amplifying input current, and can output larger current in a coil winding mode under smaller input current, so that detection current is provided for the shell, and a test environment is provided. The detection single board converts the battery voltage and the analog signal output by the Rogowski coil into a digital signal, and then transmits the acquired data to the receiving end of the radio frequency module through the transmitting end of the radio frequency module. The android screen reads the information collected by the single acquisition board through the radio frequency module receiving end, the judgment is carried out according to the preset range, the display of the case which accords with the set range is qualified, the display of the case which does not accord with the set range is unqualified, and the detection data is recorded. The radio frequency module can adopt 433Mhz wireless communication.

Preferably, the number of turns of the current coil is 20, and the current coil is wound by a polytetrafluoroethylene high-temperature wire.

Preferably, the cement resistance is 10 Ω/100W.

Preferably, the rogowski coil acquisition circuit and the battery voltage acquisition circuit are connected with the single chip microcomputer through ADC pins.

Preferably, the power circuit comprises a rectifier bridge and an LDO power chip U5.

Preferably, the battery voltage acquisition circuit comprises a voltage division circuit and a filter capacitor.

Preferably, the rogowski coil acquisition circuit comprises an operational amplifier U7A, a first resistor R87, a second resistor R89 and a third resistor R90, wherein the non-inverting input end of the operational amplifier U7A is connected with the second resistor R89, one side of the inverting input end is connected with the third resistor R90, the other side of the inverting input end is connected with the first resistor R87, and the other end of the first resistor R87 is connected with the output end of the operational amplifier U7A.

Preferably, the android screen is fixed on the fixed shell in a buckling mode.

Preferably, the M detection single plates are fixed on the fixing plate by screws.

Preferably, the transmitting end of the radio frequency module is connected with the single chip microcomputer through a USB, and the receiving end of the radio frequency module is connected with the android screen through the USB.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a voltage regulator cooperation current coil can lower cost detect for the fault indicator casing and provide test environment, and can work for a long time, can not cause equipment damage because of exerting the heavy current for a long time. The shell data are automatically detected after the single board is electrified, so that the test points are prevented from being sequentially detected by using a universal meter, and the workload is reduced. By using the radio frequency module for wireless communication, the detection single board and the android screen do not need to be in wired connection, so that the installation and the use are more convenient. The android screen can realize automatic recording and analysis of data and judgment of whether the shell is qualified, so that the workload is reduced, and the influence on a test result by subjective judgment of people is reduced.

Drawings

Fig. 1 is a circuit diagram of a fault indicator casing inspection tool of the present invention;

fig. 2 is a schematic diagram of the circuit connection between the voltage regulator and the current coil according to the present invention;

fig. 3 is a circuit diagram of the power supply circuit of the present invention;

fig. 4 is a circuit diagram of the rogowski coil acquisition circuit of the present invention;

fig. 5 is a circuit diagram of the battery voltage acquisition circuit of the present invention;

fig. 6 is a schematic structural view of the fault indicator casing inspection tool of the present invention.

In the figure: 1, a voltage regulator; 2. cement resistance; 3. a current coil; 4. detecting the single board; 5. android screen; 6. a radio frequency module; 7. a stationary housing; 8. a fixing plate; 9. a first switch; 10. a second switch.

Detailed Description

The embodiments of the present invention will be further described with reference to the accompanying drawings:

as shown in fig. 1-2, the fault indicator casing inspection tool of the present invention includes a voltage regulator 1, a cement resistor 2, a current coil 3, M detection boards 4, an android screen 5, and a radio frequency module 6, wherein the voltage regulator 1 inputs an AC220V power, an output L end of the voltage regulator 1 is connected to the cement resistor 2, the other end of the cement resistor 2 is connected to the current coil 3, and the other end of the current coil 3 is connected to an output N end of the voltage regulator 1; the detection single board 4 comprises a power circuit, a Rogowski coil acquisition circuit, a battery voltage acquisition circuit and a single chip microcomputer, wherein the input of the power circuit is connected with the output of the CT of the machine shell, the input of the Rogowski coil acquisition circuit is connected with the output of the Rogowski coil of the machine shell, the output of the Rogowski coil acquisition circuit is connected with the single chip microcomputer, and the input of the battery voltage acquisition circuit is connected with the voltage output of the battery of the; the single chip microcomputer is connected with a transmitting end of the radio frequency module 6, a receiving end of the radio frequency module 6 is connected with the android screen 5, and M is an integer of 1-50.

The voltage regulator 1 inputs an AC220V power supply and is used for outputting current to the current coil 3; the output alternating voltage can be adjusted from 0 to 220V, and the power of the voltage regulator 1 can reach 1KVA, so as to meet the test requirement. The cement resistor 2 is connected in series with the current coil 3 and the output loop of the voltage regulator 1 and is used for stabilizing the current; the cement resistor 2 is preferably 10 Ω/100W, and can pass 3A current for a long time, and can maintain the stability of the current without a little load change due to the cement resistor 2. The current coil 3 is used for amplifying input current, and can output larger current in a coil winding mode under smaller input current, so as to provide detection current for the shell and provide a test environment; the number of turns of the current coil 3 is preferably 20, the current coil is formed by winding a polytetrafluoroethylene high-temperature wire, and the current coil has the characteristics of low resistance and high temperature resistance, and can detect 50 machine shells at a time; when the input current is 3A, the overall current of the current coil 3 can reach 60A.

The fault indicator casing has three output terminals, namely a battery terminal, a CT power taking terminal and a Rogowski coil terminal, and the detection single board 4 has three corresponding acquisition ports which are respectively corresponding to the three terminals for output. Namely, the input of the power circuit is connected with the output of the CT of the machine shell, the input of the Rogowski coil acquisition circuit is connected with the output of the Rogowski coil of the machine shell, and the input of the battery voltage acquisition circuit is connected with the output of the battery voltage of the machine shell. The detection single board 4 converts the battery voltage and the analog signal output by the rogowski coil into a digital signal, and then transmits the acquired data to the receiving end of the radio frequency module 6 through the transmitting end of the radio frequency module 6. The radio frequency module 6 can adopt 433Mhz wireless communication, the transmitting end of the radio frequency module 6 is connected with the singlechip through a USB, and the receiving end of the radio frequency module 6 is connected with the android screen 5 through the USB; the detection single plate 4 and the android screen 5 do not need to be connected in a wired mode, and installation and use are more convenient. The android screen 5 reads the information collected by the acquisition single board 4 through the radio frequency module 6 receiving end, judges according to the preset range, displays the qualified shell which accords with the preset range, displays the unqualified shell which does not accord with the preset range, and records the detection data. If the acquisition single board 4 has no information to report, the power taking capability of the casing is judged to be insufficient, and the casing is judged to be unqualified. And the android screen 5 is an integrated industrial android screen.

The detection single board 4 comprises a power circuit, a rogowski coil acquisition circuit, a battery voltage acquisition circuit and a single chip microcomputer, wherein the power circuit supplies power for the detection single board 4, the rogowski coil acquisition circuit is used for acquiring output current of a rogowski coil terminal of the shell, the battery voltage acquisition circuit is used for acquiring output voltage of the battery terminal of the shell, and the single chip microcomputer is used for processing analog-to-digital conversion. The Rogowski coil acquisition circuit and the battery voltage acquisition circuit are connected with the single chip microcomputer through ADC pins.

As shown in fig. 3, the power circuit includes a rectifier bridge and an LDO power chip U5, the output terminal of the CT of the case is connected to the input terminal P5 of the power circuit, and the output terminal of the CT of the case is converted into a dc voltage through the rectifier bridge, and then the dc voltage is output through the LDO power chip U5 to supply power to the acquisition board 4.

As shown in fig. 4, the rogowski coil acquisition circuit includes an operational amplifier U7A, a first resistor R87, a second resistor R89, and a third resistor R90, the non-inverting input terminal of the operational amplifier U7A is connected to the second resistor R89, one side of the inverting input terminal is connected to the third resistor R90, the other side of the inverting input terminal is connected to the first resistor R87, the other end of the first resistor R87 is connected to the output terminal of the operational amplifier U7A, and the output terminal of the operational amplifier U7A is connected to the single chip microcomputer through an ADC pin. The output terminal of the Rogowski coil of the shell is connected to the input terminal P4 of the Rogowski coil acquisition circuit, and the Rogowski coil is amplified by the operational amplifier U7A and then output to an ADC pin of the singlechip.

As shown in fig. 5, the battery voltage collecting circuit includes a voltage dividing circuit and a filter capacitor, the casing battery voltage output terminal is connected to the battery voltage collecting circuit input terminal P3, the voltage is adjusted to the single chip ADC collecting range by the voltage dividing resistors R67 and R68 and then is input to the single chip ADC pin, the filter capacitor C21 is used for filtering, and the filtered voltage enters the single chip ADC pin.

As shown in fig. 6, the android screen 5 is fixed on the fixed shell 7 in a buckling manner, and the receiving end of the radio frequency module 6 is fixed on the android screen 5 and connected with the android screen 5 through a USB. Android screen 5 is connected AC220V power supply, sets up second switch 10 between android screen 5 and AC220V power, and control android screen 5 whether supplies power, second switch 10 can be button switch. M detect veneer 4 and pass through the screw fixation on fixed plate 8, the radio frequency module 6 transmitting terminal is fixed by detecting veneer 4 singlechip, connects the singlechip on detecting veneer 4 through USB. A first switch 9 is arranged between the cement resistor 2 and the AC220V power supply to control whether the voltage regulator 1 supplies power or not, and the first switch 9 can be a contact switch.

During the use, the testing personnel hang fault indicator casing on current coil 3, and corresponding terminal inserts in proper order detects veneer 4, then goes up the electricity for voltage regulator 1, goes up the electricity for ann tall and erect screen 5. And clicking on the android screen 5 to start detection, and waiting for detection to be finished for about 30 seconds, so that a detection result can be seen on the android screen 5.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a fault indicator casing inspection frock, includes voltage regulator (1), cement resistor (2), its characterized in that: the device is characterized by further comprising a current coil (3), M detection single plates (4), an android screen (5) and a radio frequency module (6), wherein an AC220V power supply is input into the voltage regulator (1), the output L end of the voltage regulator (1) is connected with the cement resistor (2), the other end of the cement resistor (2) is connected with the current coil (3), and the other end of the current coil (3) is connected with the output N end of the voltage regulator (1); the detection single board (4) comprises a power circuit, a Rogowski coil acquisition circuit, a battery voltage acquisition circuit and a single chip microcomputer, wherein the input of the power circuit is connected with the output of the CT of the shell, the input of the Rogowski coil acquisition circuit is connected with the output of the Rogowski coil of the shell, the output of the Rogowski coil acquisition circuit is connected with the single chip microcomputer, and the input of the battery voltage acquisition circuit is connected with the voltage output of the battery of the shell; the single chip microcomputer is connected with a transmitting end of the radio frequency module (6), a receiving end of the radio frequency module (6) is connected with the android screen (5), and M is an integer of 1-50.

2. The fault indicator casing inspection tool of claim 1, characterized in that: the number of turns of the current coil (3) is 20, and the current coil is wound by a polytetrafluoroethylene high-temperature wire.

3. The fault indicator housing inspection tool of claim 2, characterized in that: the cement resistance (2) is 10 omega/100W.

4. The fault indicator housing inspection tool of any one of claims 1 to 3, characterized in that: the Rogowski coil acquisition circuit and the battery voltage acquisition circuit are connected with the single chip microcomputer through ADC pins.

5. The fault indicator housing inspection tool of claim 4, characterized in that: the power circuit comprises a rectifier bridge and an LDO power chip U5.

6. The fault indicator housing inspection tool of claim 5, characterized in that: the battery voltage acquisition circuit comprises a voltage division circuit and a filter capacitor.

7. The fault indicator housing inspection tool of claim 6, characterized in that: the Rogowski coil acquisition circuit comprises an operational amplifier U7A, a first resistor R87, a second resistor R89 and a third resistor R90, wherein the non-inverting input end of the operational amplifier U7A is connected with the second resistor R89, one side of the inverting input end is connected with the third resistor R90, the other side of the inverting input end is connected with the first resistor R87, and the other end of the first resistor R87 is connected with the output end of an operational amplifier U7A.

8. The fault indicator housing inspection tool of claim 7, characterized in that: the android screen (5) is fixed on the fixed shell (7) in a buckling mode.

9. The fault indicator housing inspection tool of claim 8, characterized in that: m detection single plates (4) are fixed on a fixing plate (8) through screws.

10. The fault indicator housing inspection tool of claim 9, characterized in that: the transmitting end of the radio frequency module (6) is connected with the single chip microcomputer through a USB, and the receiving end of the radio frequency module (6) is connected with the android screen (5) through the USB.